US Pat. No. 9,298,242

OPTICAL MOUSE APPARATUS FOR ADJUSTING EXPOSURE OF SENSED IMAGE OUTPUT AND RELATED METHOD THEREOF

PixArt Imaging Inc., Sci...

1. An optical mouse apparatus, comprising:
a light source unit, arranged for generating and emitting an optical signal, wherein the optical signal is emitted upon a
surface, and then forms an optical reflected signal;

a sensing unit, arranged for generating a sensed image output according to the optical reflected signal, wherein the sensed
image output is utilized for estimating an image displacement of the optical mouse apparatus; and

a processing unit, coupled to the light source unit and the sensing unit, the processing unit arranged for controlling the
light source unit to emit the optical signal, and controlling an exposure of the sensed image output to dynamically switch
between at least two exposure value ranges according to the sensed image output,

wherein the processing unit adjusts the exposure of the light source unit to dynamically switch between the at least two exposure
value ranges according to a quality parameter of the sensed image output, the quality parameter is a signal-to-noise ratio
(SNR), when the SNR of the sensed image output is higher than a first signal threshold, the processing unit reduces the exposure
of the sensed image output, and switches the exposure to a second exposure value range from a first exposure value range,
and wherein the first exposure value range is higher than the second exposure value range.

US Pat. No. 9,104,249

ELECTRONIC SYSTEM WITH POINTING DEVICE AND METHOD THEREOF

Pixart Imaging Inc., Hsi...

1. A pointing device apparatus, comprising:
an image sensor generating a first image frame and a second image frame in a sequential manner, wherein the first image frame
comprises two images related to a sensed target, and the second image frame comprises one image related to the sensed target;
and

a processor configured to determine an image position representing the sensed target using the first image frame and to determine
an image displacement using the first image frame and the second image frame.

US Pat. No. 9,354,699

INPUT DEVICE AND RELATED METHOD

PixArt Imaging Inc., Sci...

1. An input device for transmitting a signal between a terminal device and an external device, the input device being a mouse
or a keyboard invariably connected with the terminal device to receive a request from the terminal device, the input device
comprising:
an input unit for generating an operation signal, the operation signal being transmitted to the terminal device according
to the request;

a terminal communication unit establishing connection to the terminal device;
a wireless transmission unit establishing connection to the external device, the wireless transmission unit being for receiving
a first datum signal outputted from the external device; and

a processor electrically connected to the input unit, the terminal communication unit and the wireless transmission unit,
the processor transmitting the operation signal and the first datum signal being transmitted to the terminal device at transmission
break of the operation signal while the input unit is in use, the processor further utilizing full bandwidth of the terminal
communication unit to transmit the first datum signal while the input unit is out of use.

US Pat. No. 9,274,650

OPTICAL TOUCH DEVICE AND RELATED IMAGE DETECTING COMPONENT AND LOCATING METHOD

PixArt Imaging Inc., Sci...

1. A locating method applied to an optical touch device, the optical touch device comprising at least one image detecting
component for detecting an imaging position of an object and generating a touch position of the object on a plane according
to the imaging position, the at least one image detecting component comprising a plurality of pixels, the locating method
comprising:
dividing the plurality of pixels into a first group and a second group along a first direction;
analyzing dimension ratios of a darkness point respectively relative to the first group and the second group when the darkness
point formed by the object is simultaneously detected by the first group and the second group, wherein a first algorithm is
utilized to calculate the imaging position of the darkness point inside the image detecting component when the darkness point
formed by the object is detected by the first group, and a second algorithm is utilized to calculate the imaging position
of the darkness point inside the image detecting component when the darkness point formed by the object is detected by the
second group;

utilizing the first algorithm and the second algorithm to respectively calculate a first subgroup imaging position of the
darkness point on the first group and a second subgroup imaging position of the darkness point on the second group;

setting the dimension ratio of the darkness point relative to the first group and the dimension ratio of the darkness point
relative to the second group as weight indices; and

multiplying the first subgroup imaging position and the second subgroup imaging position respectively by the corresponding
weight indices and adding up two multiplication results, so as to obtain the imaging position of the darkness point.

US Pat. No. 9,274,999

COMMUNICATION SYSTEM AND OPTICAL NAVIGATION DEVICE

PIXART IMAGING INC., Hsi...

1. A communication system, comprising:
a transmission interface, comprising:
a TR/ACK channel configured to transmit at least one trigger signal and an acknowledge signal; and
a DA channel configured to transmit a normal data or a simplified data;
a master device sending a first trigger signal via the TR/ACK channel before data transmission begins; and
a slave device sending the normal data or the simplified data to the master device via the DA channel after receiving the
first trigger signal;

wherein the master device and the slave device are configured to use a predetermined data transmission protocol to directly
transmit the normal data or the simplified data without transmitting an address data related to the normal data and the simplified
data,

wherein the simplified data is a compressed data or a repackaged data of the normal data.

US Pat. No. 9,420,950

RETRO-REFLECTIVITY ARRAY FOR ENABLING PUPIL TRACKING

PixArt Imaging Inc., Hsi...

6. An optical array system for performing pupil tracking using retro-reflectivity, comprising:
an LED array comprising on-axis LEDs and off-axis LEDs, for illuminating pupils of a user within an active region;
a first high-speed camera with a gaming motion sensor and a second high-speed camera with a gaming motion sensor, for capturing
images of the pupils illuminated by the LED array; and

a processor, coupled to the first and second high-speed cameras, for receiving the captured images and performing processing
algorithms on the captured images to isolate pupil information and thereby determine pupil presence and location within the
active region;

wherein the optical array system is a pair of glasses comprising a left-eye frame, for mounting a left-eye lens; a right-eye
frame for mounting a right-eye lens; a pair of arms, respectively coupled to the outermost edge of the left-eye frame and
the right-eye frame; and a bridge, for joining the innermost edges of the left-eye frame and the right-eye frame; the first
high-speed camera is disposed at the top and in the middle of the left-eye frame, the second high-speed camera is disposed
at the top and in the middle of the right-eye frame, the off-axis LEDs are disposed at the respective outermost edges of the
left-eye frame and the right-eye frame and at the respective innermost edges of the left-eye frame and the right-eye frame,
and the on-axis LEDs are disposed around the first high-speed camera and the second high-speed camera.

US Pat. No. 9,269,148

DISPLACEMENT DETECTION DEVICE

PIXART IMAGING INC., Hsi...

1. A displacement detection device, comprising:
a light source configured to illuminate a work surface in a projection direction;
an image sensor comprising an image sensing matrix having a rectangular shape and configured to capture reflected light from
the work surface and to successively output image frames; and

a processor configured to respectively select at least one window of interest in the image frames and to calculate a displacement
of the displacement detection device according to the window of interest in two of the image frames,

wherein the at least one window of interest is a partial pixel range in each of the image frames, and remaining pixel ranges
in the image frames outside the at least one window of interest are not used in calculating the displacement, and

wherein the at least one window of interest is selected corresponding to a first position of the image sensing matrix according
to reflected light from a first work surface and the at least one window of interest is selected corresponding to a second
position of the image sensing matrix according to reflected light from a second work surface, and the first position is changed
to the second position along a length direction of the image sensing matrix when the first work surface is changed to the
second work surface, wherein the first position is different from the second position, and the first work surface is different
from the second work surface.

US Pat. No. 9,395,858

CAPACITIVE FINGER NAVIGATION DEVICE WITH HYBRID MODE AND OPERATING METHOD THEREOF

Pixart Imaging Inc., Hsi...

1. A finger navigation device, comprising:
a capacitive touch device comprising:
a touch surface configured as an operating interface; and
a plurality of detecting cells configured to respectively output a capacitance variation signal; and
a processing unit configured to calculate a touch position corresponding to the touch surface according to the capacitance
variation signals and predetermined position coordinates of the detecting cells to accordingly enter a relative motion mode
or an absolute coordinate mode,

wherein the relative motion mode corresponds to a first area of the touch surface and the absolute coordinate mode corresponds
to a second area of the touch surface, and

the processing unit is further configured to adjust both of the first area and the second area according to a first detected
touch position, wherein

when the first area is increased, the second area is decreased correspondingly, and
when the first area is decreased, the second area is increased correspondingly.

US Pat. No. 9,046,935

MOTION ESTIMATION DEVICE AND POWER SAVING METHOD THEREOF

PIXART IMAGING INC., Hsi...

1. A power saving method for a motion estimation device, the motion estimation device having a fixed sampling period and comprising
a light source illuminating with an adjustable emitting cycle to provide the needed light for the motion estimation device
during capturing images, the power saving method comprising:
calculating a first differential image at a first time;
calculating a second differential image at a second time, wherein a time interval between the first time and the second time
is equal to one emitting cycle and the emitting cycle is a first integral multiple of the fixed sampling period;

comparing the first differential image and the second differential image to obtain a displacement between the first differential
image and the second differential image;

comparing the displacement with at least one threshold value; and
adjusting the emitting cycle of the light source to a second integral multiple of the fixed sampling period according to a
comparison result of comparing the displacement and the threshold value and maintaining the fixed sampling period unchanged
when adjusting the emitting cycle of the light source,

wherein the emitting cycle is longer than the fixed sampling period;
wherein the first differential image and the second differential image are obtained by subtracting a background image captured
when the light source is turned off from an effective image captured when the light source is illuminating, and the effective
image and the background image are captured within the same emitting cycle.

US Pat. No. 9,285,927

EXPOSURE MECHANISM OF OPTICAL TOUCH SYSTEM AND OPTICAL TOUCH SYSTEM USING THE SAME

PIXART IMAGING INC., Hsi...

1. An exposure mechanism of an optical touch system, the optical touch system comprising a plurality of image sensors and
a plurality of active light sources, each of the active light sources irradiating corresponding to the associated image sensor,
the exposure mechanism comprising:
capturing image frames using the image sensors with a sampling cycle to allow each of the image sensors to capture a bright
image, wherein the sampling cycle comprises a plurality of working modes and in each of the working modes at least one of
the image sensors captures the bright image in a sampling interval;

simultaneously capturing a dark image using all the image sensors in a denoising sampling interval; and
calculating, using a processing unit, a differential image between the bright image and the dark image captured by each of
the image sensors,

wherein the sampling intervals of a part of the working modes are not identical and the denoising sampling interval is equal
to a shortest sampling interval of the sampling intervals.

US Pat. No. 9,256,332

CONCURRENT DRIVING CAPACITIVE TOUCH SENSING DEVICE CAPABLE OF RESENDING DRIVE SIGNALS

Pixart Imaging Inc., Hsi...

1. A concurrent driving capacitive touch sensing device comprising:
a capacitive sensing matrix comprising a plurality of drive electrodes and a plurality of sense electrodes configured to form
coupling capacitance;

a drive end configured to
concurrently input cycle data of encoded and modulated drive signals into the drive electrodes, and
concurrently input a plurality of cycle data into the drive electrodes in each of a plurality of drive time slots of a frame
of the capacitive sensing matrix, and the cycle data within a same drive time slot and corresponding to a same drive electrode
are identical; and

a detection end coupled to one of the sense electrodes and configured to
acquire a predetermined number of sampled values corresponding to the cycle data associated with the coupled sense electrode
and generate a response signal to the drive end according to the sampled values, and

be sequentially coupled to the sense electrodes of the capacitive sensing matrix so as to acquire the predetermined number
of sampled values corresponding to each of the cycle data of each of the drive time slots, and generate a detection signal
according to notch filtering or standard deviation of the sampled values of each of the drive time slots,

wherein the drive end resends the cycle data according to the response signal.

US Pat. No. 9,049,333

OPTICAL DETECTING DEVICE AND RELATED METHOD OF SYNCHRONIZATION ADJUSTMENT

PixArt Imaging Inc., Sci...

13. An optical detecting device for detecting an indicating light source, the optical detecting device comprising:
an image detector for acquiring a continued image set; and
a control unit electrically connected to the image detector, the control unit analyzing intensity of each image of the continued
image set, and adjusting an exposure timing sequence of the image detector according to intensity ratio of at least two images
and a duty cycle of the image detector;

wherein an exposure frequency of the image detector is greater than a flickering frequency of the indicating light source,
the control unit further obtains a duty cycle or a flickering period of the indicating light source according to time difference
between a half illuminated image and the other half illuminated image of the continued image set, so as to adjust the exposure
timing sequence of the image detector accordingly.

US Pat. No. 9,425,812

CIRCUIT CALIBRATING METHOD AND CIRCUIT CALIBRATING SYSTEM

PixArt Imaging Inc., Hsi...

1. circuit calibrating system, applied to calibrate a target circuit, comprising:
a digital control code generating circuit, configured to generate a digital control code;
an analog control signal generating circuit, comprising a plurality of analog control signal generating units, configured
to correspondingly activate at least one part of the analog control signal generating units to generate different analog control
signals according to different digital control codes;

a control unit, configured to perform following steps (a)-(c):
(a) determining which one of the analog control signals has a large difference between an actual value of the analog control
signal and an ideal value of the analog control signal;

(b) adjusting a number of the analog control signal generating units that a digital control code corresponding to the analog
control signal acquired in the step (a) can activate, or adjusting a number of the analog control signal generating units
that a neighboring stage for the digital control code corresponding to the analog control signal acquired in the step (a)
can activate; and

(c)generating the analog control signal to the target circuit, according to the number of the analog control signal generating
units, which is adjusted in the step (b).

US Pat. No. 9,395,847

IMAGE SENSING METHOD AND IMAGE SENSING APPARATUS

PixArt Imaging Inc., Sci...

10. An image sensing method, comprising:
computing a read region, which is for sensing an object and is in the image sensing unit array comprising a plurality of image
sensing units arranged in a sensing matrix with M rows and N columns; and

reading at least one part of the column or the row, wherein the part of the column or the row, which is read, comprises the
read region;

wherein the read region comprises a first read region and a second read region, wherein the image sensing method comprises
computing a first read slope and a second read slope according to the image of the object, computing the first read region
according to the first read slope, and computing the second read region according to the second read slope.

US Pat. No. 9,383,253

OPTICAL TOUCH DEVICE HAVING A PLURALITY OF LIGHT GUIDE COMPONENTS EACH WITH AN ACUTE ANGLE BETWEEN LIGHT EMITTING SURFACES

PIXART IMAGING INC., Hsi...

1. An optical touch device with a detecting area, comprising:
a plurality of light guide components arranged along a plurality of sides of the detecting area, the light guide components
including a first light guide component and a second light guide component arranged at two neighboring sides of the detecting
area, each of the first light guide component and the second light guide component including a first light emitting surface
and a second light emitting surface, the first light emitting facing the detecting area, the second light emitting surface
being connected to the first light emitting surface, an included angle between the second light emitting surface and the first
light emitting surface being an acute angle, and the second light emitting surfaces of the first light guide component and
the second light guide component being two neighboring end surfaces of the first light guide component and the second light
guide component;

a light source module configured for providing light into the light guide components, the second light emitting surfaces of
the first light guide component and the second light guide component being configured for guiding the light to an area between
the second light emitting surfaces; and

a light detecting component disposed between the second light emitting surfaces of the first light guide component and the
second light guide component, and the light detecting component including a light detecting end facing the detecting area.

US Pat. No. 9,170,682

IMAGE PROCESSING METHOD FOR OPTICAL TOUCH SYSTEM

Pixart Imaging Inc., Hsi...

1. An image processing method for an optical touch system, comprising the steps of:
obtaining an image of an object contacting a sensing area of a touch surface by generating a light distribution curve pattern
representing light intensity values of light directed at and around the object from a light source;

determining presence of at least one target signal from the light distribution curve pattern in accordance with the light
intensity values from the light distribution curve pattern;

determining at least one rising slope and at least one falling slope from the light intensity values of the at least one target
signal in the light distribution curve pattern, and

recognizing the at least one target signal as an object signal when absolute values of the at least one rising slope and the
at least one falling slope are greater than a threshold.

US Pat. No. 9,455,823

FOUR-PHASE CLOCK GENERATOR WITH TIMING SEQUENCE SELF-DETECTION

PIXART IMAGING INC., Hsi...

1. A four-phase clock generator with timing sequence self-detection, comprising:
a phase-locked loop (PLL) for generating a first to a fourth reference clock signal with a same frequency, respectively, wherein
each consecutive two of said first to said fourth reference clock signals have a 90-degree phase difference;

a frequency dividing module being coupled to said phase-locked loop to determine whether to perform frequency dividing on
said first to said fourth reference clock signals to obtain a first through a fourth output clock signal according to a first
control signal, wherein said frequency dividing module is triggered by said fourth reference clock signal to start perform
frequency dividing; and

a detection and control module being coupled to said frequency dividing module to detect a timing sequence of said first to
said fourth output clock signals to output said first control signal accordingly;

wherein when the phase difference for each consecutive two of the four reference clock signals is no longer 90-degree, said
first control signal controls said frequency dividing module to stop performing frequency dividing on said first to said fourth
reference clock signals since said timing sequence of said first to said fourth output clock signals is incorrect.

US Pat. No. 9,354,717

OPTICAL NAVIGATION DEVICE

PIXART IMAGING INC., Hsi...

1. An optical navigation device, configured to be operated on a work surface, the optical navigation device comprising:
a first light source and a second light source configured to illuminate the work surface in a first brightness value and a
second brightness value;

an image sensor configured to receive reflected light from the work surface and output a first image frame corresponding to
the first brightness value and a second image frame corresponding to the second brightness value; and

a processor electrically coupled to the first light source, the second light source and the image sensor, and configured to
control illuminating of the first light source and the second light source,
calculate a first average intensity difference associated with the illuminating of the first light source and a second average
intensity difference associated with the illuminating of the second light source, and

identify an operating state according to comparison results of comparing the first average intensity difference with a first
threshold and comparing the second average intensity difference with a second threshold,

wherein the first threshold is identical to or different from the second threshold.

US Pat. No. 9,311,072

PROTOCOL SYSTEM AND RELATED METHOD OF AUTOMATICALLY UPDATING A DATUM

PixArt Imaging Inc., Sci...

1. A method of automatically updating a datum, the method being applied to a signal outputting device and a plurality of signal
receiving devices for datum transmission, the method comprising:
outputting a detecting signal to detect whether any of the signal receiving devices is located within an effective range of
the detecting signal;

receiving a plurality of reacting signals generated according to the detecting signal;
analyzing the plurality of reacting signals wherein each of the reacting signals represents a distance between the signal
outputting device and the corresponding signal receiving device;

selecting one of the plurality of signal receiving devices having the distance smaller than a threshold;
outputting a request of the datum transmission in accordance with the selected signal receiving device; and
transmitting the datum to the selected signal receiving device via wireless transmission when the request is allowed by the
selected signal receiving device, so as to drive the selected signal receiving device to automatically execute an application
program according to the updated datum;

wherein the selected signal receiving device is configured to control at least one electric equipment, and the updated datum
contains personalized environmental control parameter for rapidly adjusting the at least one electric equipment.

US Pat. No. 9,285,451

LIGHT SOURCE DETERMINING APPARATUS, LIGHT SOURCE DETERMINING METHOD AND OPTICAL TRACKING APPARATUS

PixArt Imaging Inc., Sci...

1. A light source determining apparatus, for determining if a light source is a specific type light source, comprising:
a light filtering device, comprising at least one first region and at least one second region, wherein the first region can
pass only light with a specific frequency range, where the second region can pass not only light with the specific frequency
range but also light with other frequencies; and

a determining unit, for determining if the light source is the specific type light source, according to luminosity that the
light source respectively generates for the first region and the second region;

an image sensing chip, for sensing an image generated by the light source, wherein the image comprises a first image region
area generated via the first region and a second image region area generated via the second region, wherein at least one pixel
of the first image region area is adjacent to at least one pixel of the second image region area;

wherein the determining unit determines if the light source is the specific type light source according to a relation between
a luminosity difference and a threshold value, wherein the luminosity difference is difference between a luminosity for the
pixel of the first image region area and a luminosity for the pixel of the second image region area which is adjacent to the
pixel of the first image region area.

US Pat. No. 9,268,409

METHOD AND SYSTEM FOR GESTURE IDENTIFICATION BASED ON OBJECT TRACING

PIXART IMAGING INC., Hsi...

1. A method for gesture identification based on object tracing, the method comprising the steps of:
A.) projecting light to an operation space;
B.) capturing images from the operation space to generate a plurality of successive images;
C.) detecting a bright region in each of the successive images;
D.) detecting at a first operation distance to identify whether any object is moving;
E.) switching the first operation distance to a second operation distance if no moving object is detected in the step D;
F.) performing object tracing based on information provided by the bright region if a moving object is detected in the step
D; and

G.) comparing a result of the object tracing with predetermined gesture definitions to identify an operation gesture.

US Pat. No. 9,263,604

WAFER SCALE IMAGE SENSOR PACKAGE AND OPTICAL MECHANISM INCLUDING THE SAME

PIXART IMAGING INC., Hsi...

1. An optical mechanism, comprising:
a substrate having a front side and a rear side opposite to the front side;
a wafer scale image sensor package attached to the front side of the substrate and having an active area;
a light source attached to the front side of the substrate;
a blocking member attached to the front side of the substrate from a front of the active area of the wafer scale image sensor
package to cover the wafer scale image sensor package, the blocking member comprising an opening to expose at least the active
area of the wafer scale image sensor package; and

a securing member fitting on the blocking member from the front of the active area of the wafer scale image sensor package
to secure the blocking member to the front side of the substrate, wherein the securing member comprises a first transparent
area associated with the light source and a second transparent area associated with the opening of the blocking member, and
the securing member has

a first portion engaging the rear side of the substrate,
a second portion extending from the first portion, through a hollow in the substrate, to the front side of the substrate,
and

a third portion connected to the second portion and engaging a front side of the blocking member, wherein
the blocking member is sandwiched between the third portion of the securing member and the front side of the substrate.

US Pat. No. 9,075,484

SENSOR PATTERNS FOR MUTUAL CAPACITANCE TOUCHSCREENS

PixArt Imaging Inc., Sci...

1. A mutual capacitance touchscreen, comprising:
a first set of electrically conductive traces arranged in rows or columns, and
a second set of electrically conductive traces arranged in rows or columns arranged at an angle with respect to the rows or
columns of the first set; wherein the first and second sets of traces are electrically insulated from another, each cell comprising
a plurality of sub-cell rectangular or square drive electrodes electrically connected to one another by first cross-over traces
and a plurality of sub-cell rectangular or square sense electrodes electrically connected to one another by second cross-over
traces, the sub-cell drive and sense electrodes being interleaved with respect to, and disposed in between, one another within
each cell, the sub-cell sense and drive electrodes being separated by gaps within each cell, the first and second sets of
electrically conductive traces comprising and being electrically connected to the drive and sense electrodes;

wherein the sub-cell rectangular or square drive or sense electrodes each form a pattern having an unfilled empty center surrounded
by an electrically conductive material.

US Pat. No. 9,046,960

LIGHT PATH ADJUSTING ASSEMBLY AND OPTICAL TOUCH DEVICE USING THE SAME

PIXART IMAGING INC., Hsi...

1. An optical touch device, which defines a sensing region having a plurality of sides, comprising:
a frame surrounding the sensing region; and
a plurality of light path adjusting assemblies respectively disposed beside the sides of the sensing region, each of the light
path adjusting assemblies comprising:

a supporting component having a lengthwise direction, comprising:
a mounting portion fixed to the frame, the mounting portion longitudinally extending along the lengthwise direction;
a light transmission portion longitudinally extending along the lengthwise direction, two sides of the light transmission
portion facing to the mounting portion and the sensing region respectively; and

a connecting portion located between the mounting portion and the light transmission portion, the connecting portion longitudinally
extending along the lengthwise direction and being connected to the mounting portion and the light transmission portion, thereby
forming a receiving space between the mounting portion and the light transmission portion; and

a light path adjusting component disposed in and matched with the receiving space, wherein the light path adjusting component
is a light reflecting bar.

US Pat. No. 9,459,351

IMAGE SYSTEM

PIXART IMAGING INC., Hsi...

1. An image system comprising:
a light source configured to illuminate at least one portion of an object;
an image sensing device configured to generate an object image produced by the object;
a computing apparatus configured to determine an intensity value of light from the light source representing the object image
and to determine a distance between the object and the image sensing device using the intensity value of the light and a dimension
of the object image, wherein the computing apparatus is further configured to determine the intensity value of the light based
on an intensity of the light from the light source that is reflected from the object, and the dimension of the object image
is based on a distance of the object from the image sensing device; and

a visible light image sensing device configured to generate a visible light picture of the object, wherein the computing apparatus
is further configured to determine a position of the visible light picture and a dimension of the object based on the visible
light picture.

US Pat. No. 9,289,159

USER IDENTIFICATION METHOD, PHYSIOLOGICAL DETECTION DEVICE AND PHYSIOLOGICAL DETECTION METHOD

PIXART IMAGING INC., Hsi...

1. A user identification method, comprising:
a step of constructing database in which at least one predetermined track, drawn by at least one user for a predetermined
time interval or a predetermined times on a finger detection unit, is analyzed to construct a database containing at least
one track feature corresponding to the at least one predetermined track drawn by the at least one user; and a step of identifying
user in which a current track drawn by a current user on the finger detection unit is analyzed and the current user is identified
according to the track feature in the database; wherein after the step of identifying user ID the method further comprises:
detecting current physiological information of the current user with the finger detection unit; and storing the current physiological
information to the database.

US Pat. No. 9,261,982

IMAGE ADJUSTING METHOD AND OPTICAL NAVIGATING APPARATUS UTILIZING THE IMAGE ADJUSTING METHOD

PixArt Imaging Inc., Sci...

10. An optical navigating apparatus, comprising:
at least one light source, for emitting light to an object;
an image sensor, for catching a current image that is generated via the object and the light; and
a displacement detecting module, for computing at least one kind of brightness information of the current image, for respectively
setting corresponding threshold values to different kinds of the brightness information, and for determining if a contrast
enhancing operation should be performed to the current image to generate an adjusted image according to a number that the
brightness information is over the threshold value;

wherein the displacement detecting module determines if displacement exists between the object and the optical navigating
apparatus according to the adjusted image if the displacement detecting module performs the contrast enhancing operation;

wherein the displacement detecting module determines if displacement exists between the object and the optical navigating
apparatus according to the current image if the displacement detecting module does not perform the contrast enhancing operation;
wherein the displacement detecting module determines a ratio for the contrast enhancing operation according to the number
that the brightness information is over the threshold value.

US Pat. No. 9,465,153

LINEAR LIGHT SOURCE MODULE AND OPTICAL TOUCH DEVICE WITH THE SAME

PIXART IMAGING INC., Hsi...

1. A linear light source module, comprising:
a mirror light guide component having a light emitting end, a surface opposite to the light emitting end and a light incidence
end connected between the light emitting end and the surface, and the surface having a mirror light reflecting layer formed
thereon; and

a light emitting component configured for providing light to the light incidence end of the mirror light guide component;
wherein the mirror light guide component is a light guide bar and is configured for converting the light from the light emitting
component into a linear light to emit from the light emitting end when the light emitting component is lighted, the mirror
light guide component is a mirror bar and is configured for providing a mirror function when the light emitting component
is closed.

US Pat. No. 9,423,893

GESTURE DETECTION DEVICE FOR DETECTING HOVERING AND CLICK

Pixart Imaging Inc., Hsi...

1. A gesture detection device, comprising:
a detection surface having a normal direction;
an infrared light source configured to emit light alternatively in a first brightness value and a second brightness value,
wherein the second brightness value is zero or nonzero brightness;

a first image sensor disposed on the detection surface and configured to capture a first image corresponding to light emission
of the infrared light source and along a direction deviating a predetermined angle from the normal direction;

a second image sensor disposed on the detection surface offsetting a predetermined distance from the first image sensor along
a Z-axis and configured to capture a second image corresponding to the light emission of the infrared light source and along
a direction deviating a negative predetermined angle from the normal direction; and

a processing unit configured to
calculate a two-dimensional coordinate according to positions of a pointer image in the first image and a pointer image in
the second image, and

identify a click event of the Z-axis when a size difference of the pointer images between the first image and the second image
is larger than or equal to a difference threshold.

US Pat. No. 9,335,841

COMPUTER READABLE MEDIA CAN PERFORM INTERFERENCE IMAGE DETERMINING METHOD AND INTERFERENCE IMAGE DETERMINING APPARATUS

PixArt Imaging Inc., Sci...

1. A non-transitory computer readable medium, having at least one program code recorded thereon, an interference image determining
method can be performed when the program code is read and executed, wherein the interference image determining method comprises:
(a) controlling a light source to illuminate an object on a detecting surface to generate an image;
(b) controlling a sensor to catch a current frame of the image;
determining whether the object can be detected in the current frame of the image; and
determining whether displacement of the object has occurred when determined that the object can be detected in the current
frame;

(c) utilizing an image characteristic included in the current frame to determine an interference image part of the current
frame, the interference image part being a still image part generated from the presence of at least one of a scraping trace,
a finger print and dust located on the detecting surface that causes fixed interference effects; and

d) updating a defined interference image according to the determined interference image part when determined that displacement
of the object has occurred and not updating the defined interference image according to the determined interference image
part when the object can be detected in the current frame and that displacement of the object has not occurred.

US Pat. No. 9,210,449

VIDEO GENERATING SYSTEM WITH MULTIPLE IMAGE SENSORS AND RELATED METHOD THEREOF

PixArt Imaging Inc., Sci...

1. A video generating system, comprising:
a plurality of image sensors, arranged to generate a plurality of images and a plurality of synchronization signals corresponding
to the images; and

a combining circuit, coupled to the image sensors, arranged to generate a plurality of output images according to the images,
and generate a plurality of output synchronization signals corresponding to the output images according to the synchronization
signals;
wherein the image sensors comprise a first image sensor and a second image sensor; and when the combining circuit receives
image data of at least a first image generated by the first image capturer, the combining circuit does not receive image data
of at least a second image generated by the second image capturer at the same time;wherein an output image of the output images is composed of the first image and the second image, and an upper half of the
output image is composed of the first image; and a lower half of the output image is composed of the second image.

US Pat. No. 9,342,164

MOTION DETECTING DEVICE AND THE METHOD FOR DYNAMICALLY ADJUSTING IMAGE SENSING AREA THEREOF

PIXART IMAGING INC., Hsi...

1. A motion detecting device, configured for detecting a flatness of a surface and dynamically adjusting an image sensing
region, the motion detecting device comprising:
a light source, launching a light;
an image capture unit, capturing at least one reference image of the surface according to a fixed sampling period; and
a processing unit, connected to the light source and the image capture unit, the processing unit calculating an exposure reference
value of the light source and an image characteristic value of the reference image, and then accordingly determining whether
the surface is in a first rough coefficient range, which is a range for a smooth surface, or a second rough coefficient range,
which is a range for a rough surface, wherein the processing unit chooses a search frame which is smaller than the reference
image on the reference image,

wherein if the surface is in the first rough coefficient range, the processing unit defines a first image sensing region on
the reference image, the first image sensing region is larger than the search frame by a first search radius in order to achieve
a high operation speed of the motion detecting device or defines a second image sensing region on the reference image, the
second image sensing region is larger than the search frame by a second search radius in order to reduce power consumption,
wherein the first image sensing region is larger than the second image sensing region and the first search radius is larger
than the second search radius;

wherein if the surface is in the second rough coefficient range, the processing unit defines a third image sensing region
on the reference image, the third image sensing region is larger than the search frame by a third search radius in order to
achieve a high operation speed of the motion detecting device or defines a fourth image sensing region on the reference image,
the fourth image sensing region is larger than the search frame by a fourth search radius in order to reduce power consumption,
wherein the third image sensing region is larger than the fourth image sensing region, and the third search radius is larger
than the first search radius and the fourth search radius; and

wherein the search frame is moved on the first image sensing region, the second image sensing region, the third image sensing
region, or the fourth image sensing region pixel by pixel for calculating displacement of pixels of the image sensing regions.

US Pat. No. 9,317,744

DEVICE AND METHOD FOR DETERMINING GESTURE AND OPERATION METHOD OF GESTURE DETERMINING DEVICE

Pixart Imaging Inc., Hsi...

1. A device for determining a gesture, comprising:
a light emitting unit configured to emit a light beam;
an image sensing device configured to capture an image of a hand reflecting the light beam; and
a processing circuit, electrically connected to the image sensing device, configured to obtain the image and determine a gesture
of the hand by performing an operation on the image;

wherein the operation comprises steps of:
selecting pixels in the image having a brightness greater than or equal to a brightness threshold, wherein the image of the
hand is composed by a plurality of areas different in brightness due to these areas have different distances relative to the
light emitting unit;

dividing the selected pixels into a number of group of divided pixels; and
determining the gesture of the hand according to the number of group of divided pixels.

US Pat. No. 9,116,575

CAPACITANCE SENSING CIRCUIT AND POWER SUPPLYING APPARATUS UTILIZING THE CAPACITANCE SENSING CIRCUIT

PixArt Imaging Inc., Sci...

1. A capacitance sensing circuit, comprising:
a first voltage source;
a first switch, wherein the first voltage source charges an sensing capacitor to a first voltage when the first switch is
conductive;

a base capacitor;
a second voltage source;
a second switch, wherein the second voltage source charges the base capacitor to a second voltage when the second switch is
conductive;

a first comparator, for outputting a first comparing result according a difference between a first voltage difference and
a second voltage difference, wherein the first voltage difference is a difference for the first voltage and the second voltage,
wherein the second voltage difference is a difference for an sensing voltage on the sensing capacitor and a base voltage on
the base capacitor; and

a voltage holding circuit, for keeping the base voltage at a reference voltage.

US Pat. No. 9,389,742

CAPACITIVE TOUCH DEVICE, CAPACITIVE COMMUNICATION DEVICE AND COMMUNICATION SYSTEM

Pixart Imaging Inc., Hsi...

1. A capacitive touch device, configured to perform a near field communication with an external touch panel, the capacitive
touch device comprising:
a touch panel comprising a plurality of drive electrodes and a plurality of receiving electrodes configured to form a coupling
electric field with the external touch panel, wherein the receiving electrodes are respectively configured to output a detection
signal according to the coupling electric field;

a detection circuit, coupled to one of the receiving electrodes, configured to modulate the detection signal respectively
with two signals to generate two detection components; and

a processing unit configured to obtain a norm of vector according to the two detection components to accordingly identify
a touch event and obtain a phase value according to the two detection components to accordingly decode transmission data.

US Pat. No. 9,383,866

IMAGE SENSING APPARATUS, OPTICAL TOUCH CONTROL APPARATUS AND MOTION TRACKING APPARATUS UTILIZING THE IMAGE SENSING APPARATUS

PixArt Imaging Inc., Sci...

1. An image sensing apparatus, comprising:
a control unit; and
an image sensor, wherein the control unit controls the image sensor to utilize a first image sensing region to sense a first
image to output a first image signal in a first mode, wherein the control unit controls the image sensor to utilize a second
image sensing region to sense a second image to output a second image signal in a second mode,

wherein the first image sensing region is smaller than a total image sensing region of the image sensor, and the second image
sensing region is smaller than the first image sensing region,

wherein the control unit controls the image sensor to utilize the second image sensing region to sense brightness of the second
image and switches the image sensing apparatus back to the first mode if variation of the brightness is larger than a threshold
value, and

wherein the control unit controls the image sensing apparatus to keep in the second mode if variation of the brightness is
smaller than the threshold value.

US Pat. No. 9,274,615

INTERACTIVE INPUT SYSTEM AND METHOD

PixArt Imaging Inc., Sci...

1. An interactive input system comprising:
at least two imaging assemblies capturing image frames of a region of interest wherein the at least two imaging assemblies
capturing images from different vantages, each imaging assembly comprising an image sensor and signal processing circuitry
implemented on an application specific integrated circuit (ASIC), image data acquired by said image sensor being pre-processed
by said signal processing circuitry; and

processing structure processing pre-processed image data output by said imaging assemblies to determine a location of at least
one pointer within the region of interest.

US Pat. No. 9,244,541

IMAGE SENSING APPARATUS AND OPTICAL NAVIGATING APPARATUS WITH THE IMAGE SENSING APPARATUS

PixArt Imaging Inc., Sci...

8. An optical navigating apparatus, comprising:
an image sensing apparatus, for generating a first image sensing signal in a first mode, and for generating a second image
sensing signal in a second mode, comprising:

a sensing pixel, comprising: a charge storing device;
a light sensing device, for generating a first amount of photoelectrons according to a environmental light received in a first
mode, and for generating a second amount of photoelectrons according the environmental light and a light source light to received
in a second mode, wherein the second amount is larger than the first amount; and

a switch device, for determining a charge amount that the photoelectrons can be transmitted from the light sensing device
to the charge storing device according to a control voltage and the switch device controlled by the control voltage to be
partially conductive so a third charge amount of photoelectrons do not flow into the charge storing device; and

an image sensing signal generating circuit, for generating an image sensing signal according to the charges stored in the
charge storing device; and

a control circuit, for generating the control voltage, thereby the charge amount that the photoelectrons can be transmitted
from the light sensing device to the charge storing device in the first mode is a first charge amount and the charge amount
that the photoelectrons can be transmitted from the light sensing device to the charge storing device in the second mode is
a second charge amount, wherein the first charge amount equals to the first amount minus the third charge amount, and the
second charge amount equals to the second amount minus the third charge amount; wherein the first charge amount and the second
charge amount are smaller than a maximum charge storing amount for the charge storing device;

wherein the image sensing signal generating circuit generates the first image sensing signal according to the first amount
of photoelectrons, and generates the second image sensing signal according to the second amount of photoelectrons; and

a light source, for generating no light in the first mode, and for providing light to the light sensing device in the second
mode; a processing unit, for subtracting the first image sensing signal from the second image sensing signal to compute movement
between the optical navigating apparatus and an object.

US Pat. No. 9,377,366

NAVIGATION DEVICE INCLUDING THERMAL SENSOR

Pixart Imaging Inc., Hsi...

1. A navigation device, configured to be operated on a work surface, the navigation device comprising:
a light guide comprising a light emergent surface;
an image sensor facing the light emergent surface and configured to capture reflection images of the work surface according
to light emerging from the light emergent surface;

a bolometer facing the same light emergent surface of the same light guide as the image sensor and configured to output temperature
readings of the work surface according to the light emerging from the light emergent surface; and

at least one processing unit configured to perform tracking operation according to the reflection images and identify a lift
event according to the temperature readings.

US Pat. No. 9,335,525

OPTICAL LENS, IMAGE-CAPTURING DEVICE AND OPTICAL TOUCH SYSTEM

PIXART IMAGING INC., Hsi...

1. An optical lens used for configuring in front of an image-capturing lens of an image-capturing device, which includes a
light-emitting unit used for emitting a light beam, the optical lens comprising:
a pair of peripheral compensation portions each having a first convex surface and a first concave surface arranged opposite
to the first convex surface; and

a central diverging portion arranged between and connected to the peripheral compensation portions, the central diverging
portion having a second concave surface and a light incident surface arranged opposite to the second concave surface, the
second concave surface arranged between the first convex surfaces, the light incident surface arranged between the first concave
surfaces, wherein the optical axis of the light beam sequentially passes through the light incident surface and the second
concave surface, and a plurality of light rays of the light beam passes through the first concave surfaces and the first convex
surfaces in sequence.

US Pat. No. 9,255,795

DISTANCE MEASURING DEVICE WITH INCREASED SIGNAL-TO-NOISE RATIO AND METHOD THEREOF

PixArt Imaging Inc., Sci...

1. A method of increasing signal-to-noise ratio of a distance-measuring device, the distance-measuring device being utilized
for measuring a measured distance between the distance-measuring device and a measured object, the measured distance being
longer than a predetermined shortest measured distance and shorter than a predetermined longest measured distance, the distance-measuring
device having a light-emitting component for emitting a detecting light, and a first light-sensing component for sensing and
accumulating energy of light according to a first shutter periodic signal to generate a light-sensing signal, the method comprising:
the light-emitting component continuously emitting the detecting light to the measured object to generate a reflected light
during an emitting period;

a delay period after the light-emitting component starts to emit the detecting light, the first light-sensing component sensing
and accumulating energy of the reflected light during a sensing period to generate the light-sensing signal;

obtaining a time of flight of light going back and forth between the distance-measuring device and the measured object according
to the light-sensing signal and energy of the detecting light emitted by the light-emitting component during the emitting
period; and

obtaining the measured distance according to the time of flight;
wherein:
the delay period is calculated according to the predetermined shortest measured distance;
a relationship between the predetermined longest measured distance and the sensing period is represented by DMAX=2×(TSEN1+TDELAY)/C;

DMAX represents the predetermined longest measured distance;

TSEN1 represents the sensing period;

TDELAY represents the delay period; and

C represents speed of light.

US Pat. No. 9,288,369

DISPLACEMENT ESTIMATION METHOD AND DISPLACEMENT ESTIMATION DEVICE USING THE SAME

PIXART IMAGING INC., Hsi...

1. A displacement estimation method for a displacement estimation device on a working surface, the estimation device comprising
an amplifier and an image sensor, the method comprising:
acquiring an image frame of the working surface with sampling parameters, wherein the sampling parameters comprise an amplification
gain of the amplifier and an exposure time of the image sensor;

determining a number of peaks according to the sampling parameters by referring to a lookup table which stores a previously
constructed relationship between the sampling parameters and the number of peaks, wherein the sampling parameters in the previously
constructed relationship include values of the amplification gain and the exposure time, wherein the previously constructed
relationship is obtained by acquiring test image frames with the image sensor while varying the sampling parameters, and wherein
the test image frames include an image of a uniformly distributed light source and do not contain an image of any working
surface;

calculating a total number of peaks of the image frame, wherein a peak is a pixel having a gray level larger or smaller than,
by a predetermined value, gray levels of two adjacent pixels thereof in a same row or a same column of the image frame;

setting a quality threshold directly as a ratio or an offset of the determined number of peaks, wherein the quality threshold
is larger than the determined number of peaks;

comparing the total number of peaks and the quality threshold;
when the total number of peaks is larger than the quality threshold, estimating a displacement of the displacement estimation
device based on the image frame; and

when the total number of peaks is smaller than the quality threshold, ignoring the image frame.

US Pat. No. 9,070,699

MICROMACHINED STRUCTURES

PIXART IMAGING INC., Hsi...

1. A micromachined structure, comprising:
a substrate having a cavity formed thereon, wherein the substrate defines a horizontal direction parallel to a surface thereof;
and

a suspended structure formed on the cavity of the substrate, the suspended structure comprising
a first metal layer,
a second metal layer,
a first dielectric layer positioned between the first and second metal layers,
a second dielectric layer disposed on the second metal layer,
a third metal layer disposed on the second dielectric layer, and
a third dielectric layer disposed on the third metal layer,
wherein
the first dielectric layer has a first opening in communication with the cavity through an opening formed in the first metal
layer,

the second dielectric layer has a second opening in communication with the first opening through an opening formed in the
second metal layer,

the third dielectric layer has a third opening in communication with the second opening through an opening formed in the third
metal layer, and

the second opening has a second width in the horizontal direction, the third opening has a third width in the horizontal direction,
and the second width is greater than the third width.

US Pat. No. 9,310,940

CAPACITIVE TOUCHSCREEN OR TOUCH PANEL WITH FINGERPRINT READER

PixArt Imaging Inc., Sci...

1. A capacitive touchscreen or touch panel system, comprising:
a touchscreen comprising a first plurality of electrically conductive drive electrodes arranged in rows or columns, and a
second plurality of electrically conductive sense electrodes arranged in rows or columns arranged at an angle with respect
to the rows or columns of the first plurality of electrodes, mutual capacitances existing between the first and second pluralities
of electrodes at locations where the first and second pluralities of electrodes intersect to form first and second groups
of individual cells having first and second cell dimensions associated therewith, respectively, all of the first cell dimensions
being identical to each other, all of the second cell dimensions being identical to each other, each of the first cell dimensions
being different from each of the second cell dimensions, the second group of individual cells including multiple sub-regions,
traces of the second group of individual cells in different sub-regions being connected to a same one of the second plurality
of electrically conductive sense electrodes, the mutual capacitances changing in the presence of one or more fingers of a
user or touch devices brought into proximity thereto;

drive circuitry operably connected to the first plurality of drive electrodes, and
at least first sense circuitry operably connected to the second plurality of sense electrodes of the first group and the second
group,

wherein the first group and first cell dimensions are configured to permit the detection by the first sense circuitry of the
presence of the one or more fingers of the user or touch devices brought into proximity thereto, and the second group and
second cell dimensions form a fingerprint reader configured to permit at least one fingerprint from the user's finger to be
read by the first sense circuitry associated therewith.

US Pat. No. 9,223,444

CMOS IMAGE SENSOR WITH SHARED MULTIPLEXER AND METHOD OF OPERATING THE SAME

PixArt Imaging Inc., Sci...

1. A CMOS image sensor comprising:
a pixel array unit for sensing an object, the pixel array unit comprising M pixels and P multiplexers, each of the M pixels
being electrically connected to one of the P multiplexers wherein M is a positive integer and P is a positive integer;

a row selection unit, electrically connected to the P multiplexers, for generating a row selection signal; and
a logic circuit, electrically connected to the P multiplexers, for determining a sensing region having rows of pixels that
directly correspond to a position of the object, wherein the sensing region has a non-rectangular shape and comprises N of
the M pixels, and N is a positive integer smaller than or equal to M, the logic circuit controlling Q multiplexers, which
are electrically connected to the N pixels, to transmit the row selection signal to the N pixels, such that at least two rows
of the sensing region have different numbers of pixels, at least one row of the sensing region has two pixel groups, each
pixel group has a plurality of pixels adjacent to each other, each pixel group does not overlap with another pixel group of
the sensing region, and each pixel group is not adjacent to another pixel of the sensing region in the same row, wherein Q
is a positive integer smaller than or equal to N and smaller than or equal to P.

US Pat. No. 9,048,041

KEY PRESS DETECTING CIRCUIT AND METHOD FOR DETECTING THE STATUS OF MULTIPLE KEYS THROUGH A SINGLE PIN

PIXART IMAGING INC., Hsi...

1. A key press detecting circuit for detecting a status of a plurality of keys which are connected in series or in parallel
with a plurality of resistors to establish a key module, the key press detecting circuit comprising:
a single pin connected to the key module;
a constant voltage control circuit connected to the single pin, setting the single pin at a first voltage by adjusting a first
current;

a current source connected to the constant voltage control circuit, providing the first current and a second current related
to the first current; and

a current comparator connected to the current source, comparing the second current with a set of reference values to generate
an output signal representative of the status of the plurality of keys.

US Pat. No. 9,652,052

OPTICAL MINI-MOUSE

PIXART IMAGING INC., Hsi...

1. An optical mini-mouse, for being operated on a work surface, the optical mini-mouse comprising:
a mouse case comprising an operating region and an accommodation space arranged along a length direction;
a navigation module disposed inside the accommodation space and comprising a plurality of image sensors respectively configured
to detect a rotation direction of the optical mini-mouse with respect to the work surface and identify a rotation mode according
to the rotation directions detected by different image sensors; and

a finger detection module configured to detect at least one of a click event and a slide event in the operating region.

US Pat. No. 9,354,749

OPTICAL TOUCH SYSTEM WITH BRIGHTNESS COMPENSATION AND BRIGHTNESS COMPENSATION METHOD THEREOF

PIXART IMAGING INC., Hsi...

1. An optical touch system, comprising:
a touch surface;
a plurality of reflection light bars respectively disposed at a plurality of edges of the touch surface;
a first image sensor configured to capture image frames looking across the touch surface;
a first active light source disposed adjacent to the first image sensor;
a second active light source disposed at a corner of the touch surface and within a field of view of the first image sensor;
and

a second image sensor
disposed at the corner of the touch surface where the second active light source is disposed, and
configured to capture image frames looking across the touch surface;
wherein
during an interval that the first image sensor captures a first image frame, the first active light source emits light with
a first brightness value and the second active light source emits light with a second brightness value smaller than the first
brightness value,

the first image sensor and the first active light source are within a field of view of the second image sensor, and
during an interval that the second image sensor captures a second image frame, the first active light source emits light with
a third brightness value and the second active light source emits light with a fourth brightness value larger than the third
brightness value.

US Pat. No. 9,258,510

METHOD OF OPTICAL TRACKING A FRAME OF AN OBJECT AND RELATED OPTICAL TRACKING SYSTEM

PixArt Imaging Inc., Sci...

1. A method of optically tracking a frame of an object, the method being applied to an optical tracking system having an image
sensor and a control unit, the method comprising:
the image sensor capturing different frames containing continuous imaging variation of a reference light source during an
operative period, wherein the frames are defined as a sequential image set, and the reference light source generates a known
illumination variation during the operative period;

the control unit identifying an image characteristic illumination variation of the sequential image set; and
the control unit comparing the image characteristic illumination variation to the known illumination variation to determine
whether a predetermined function is executed.

US Pat. No. 9,213,448

POSITIONING MODULE, OPTICAL TOUCH SYSTEM AND METHOD OF CALCULATING A COORDINATE OF A TOUCH MEDIUM

PixArt Imaging Inc., Sci...

1. A method of calculating a coordinate of a touch medium, the method comprising:
obtaining a first image to determine whether the first image overlaps a first threshold;
generating a first interceptive boundary when the first image overlaps the first threshold;
obtaining a second image to generate a second interceptive boundary by overlap of the second image and a second threshold;
and

confirming the touch medium is at a hovering status when the first interceptive boundary does not overlap the second interceptive
boundary.

US Pat. No. 9,200,894

FILM AND LIGHT GUIDE HAVING MATERIAL WHICH CAN PROVIDE POSITION INFORMATION AND DISTRIBUTED THEREON ON, AND POSITION DETECTING SYSTEM UTILIZING THE FILM OR THE LIGHT GUIDE

PixArt Imaging Inc., Sci...

1. A light guide that can provide position information, comprising:
a light receiving side, to receive light from a light source; and
a light emitting-out side, having at least one position information region distributed on an outer surface of the light emitting-out
side, wherein the light has position information from the position information region when the light emits out from at least
part of the light emitting-out side;

wherein the position information region comprises materials which are distributed on the outer surface and provide the position
information.

US Pat. No. 9,377,896

OPTICAL TOUCH SYSTEM AND HOVERING IDENTIFICATION METHOD THEREOF

Pixart Imaging Inc., Hsi...

1. An optical touch system, comprising:
a touch surface for at least one object operating thereupon;
a plurality of image sensors, each of the image sensors being configured to capture an image frame looking across the touch
surface; and

a control chip electrically coupled to the image sensors and configured to
store at least one depth threshold and an operable range of each of the image sensors corresponding to the touch surface,
calculate a coordinate of each of the object and an operating depth of each of the object corresponding to each of the image
sensors according to the image frame,

define the image sensor with the operable range thereof containing the coordinate of the object as an operable image sensor,
accumulate a count value of the operable image sensor with the associated operating depth exceeding the depth threshold corresponding
to each of the object, and

identify a touched state when the count value exceeds a counting threshold.

US Pat. No. 9,310,897

DISPLACEMENT DETECTION DEVICE USING ADJUSTABLE BLOCK SIZE

Pixart Imaging Inc., Hsi...

1. A displacement detection device, for being operated on a work surface, the displacement detection device comprising:
a light source configured to emit a main beam illuminating the work surface and forming a main reflected light path;
an image sensor located outside the main reflected light path and configured to capture a current image with an exposure parameter;
and

a control and processing unit configured to
search the current image with a search block,
calculate a quality parameter according to the current image,
adjust a block size of the search block according to the exposure parameter and the quality parameter, and
identify that the work surface does not contain enough surface features when a quotient of the quality parameter divided by
the exposure parameter is smaller than a ratio threshold.

US Pat. No. 9,244,093

MICRO-ELECTRO-MECHANICAL SENSING DEVICE AND MANUFACTURING METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. A micro-electro-mechanical sensing device, comprising:
a substrate;
a semiconductor layer, disposed on or above the substrate;
a supporting pillar, disposed on or above the semiconductor layer;
a first suspended arm, disposed on the supporting pillar, wherein the supporting pillar connects a portion of the first suspended
arm;

a first connecting member, which directly or indirectly connects another portion of the first suspended arm;
a second suspended arm including a first surface and a second surface opposite to the first surface, wherein the first connecting
member connects a portion of the first surface; and

a proof mass, which connects the second suspended arm, and which includes a portion of the second suspended arm as a portion
of the proof mass;

wherein a projection of the supporting pillar and a projection of the first connecting member do not overlap in an out-of-plane
direction of the substrate, whereby the supporting pillar, the first suspended arm, the first connecting member and the second
suspended arm form a folded structure.

US Pat. No. 9,223,386

INTERACTIVE POINTING DEVICE CAPABLE OF SWITCHING CAPTURE RANGES AND METHOD FOR SWITCHING CAPTURE RANGES FOR USE IN INTERACTIVE POINTING DEVICE

PIXART IMAGING INC., Hsi...

1. An interactive pointing device capable of switching capture ranges, comprising:
an image capturing element, configured to:
detect a light source with a first sensing angle and a first capture range to output a first image having a first pixel area
when a distance from the interactive pointing device to the light source is smaller than a reference value, and

detect the light source with a second sensing angle and a second capture range to output a second image having a second pixel
area when the distance is greater than the reference value,

wherein the first capture range and the second capture range correspond to areas of the image capturing element that are used
for sensing light and are respectively defined by a number of pixels, the first sensing angle and the second sensing angle
respectively correspond to the first and second capture ranges, the image capturing element operates using the first capture
range of the image capturing element at the first sensing angle to sense light, and operates using the second capture range
of the image capturing element at the second sensing angle to sense light, the first capture range of the image capturing
element is larger than the second capture range of the image capturing element, such that the first pixel area is larger than
the second pixel area; and

a processing unit for controlling the image capturing element to detect the light source with the first sensing angle and
the first capture range or with the second sensing angle and the second capture range, converting the first image into a first
coordinate data, and converting the second image into a second coordinate data.

US Pat. No. 9,314,173

REMOTE CONTROLLER AND DISPLAY SYSTEM

PIXART IMAGING INC., Hsi...

15. A display system, comprising:
a display device configured to display images; and
a remote controller configured to output a control signal and a physiological characteristic to the display device to control
the display device to update the images being displayed according to the control signal and to display the physiological characteristic,
the remote controller comprising:

a first light source configured to provide light of a first wavelength to a finger;
a second light source configured to provide light of a second wavelength to the finger;
a light control unit configured to control on-states of the first light source and the second light source;
at least one image sensor configured to receive reflected light from the finger to generate a plurality of first image frames
corresponding to the on-states of the first light source and a plurality of second image frames corresponding to the on-states
of the second light source; and

a processing unit configured to
(i) divide each of the first image frames into at least two parts and calculate an average brightness of each part, and analyze
the average brightness of the each part of the first image frames to obtain a first intensity variation;

(ii) divide each of the second image frames into at least two parts and calculate an average brightness of each part, and
analyze the average brightness of the each part of the second image frames to obtain a second intensity variation; and

(iii) calculate the physiological characteristic according to the first intensity variation and the second intensity variation.

US Pat. No. 9,301,694

OPTICAL FINGER MOUSE, ELECTRONIC DEVICE AND PHYSIOLOGICAL CHARACTERISTICS DETECTION DEVICE

PIXART IMAGING INC., Hsi...

1. An optical finger mouse configured to detect a displacement of a finger of a user and a physiological characteristic of
the user, the optical finger mouse comprising:
a first light source configured to emit light of a first wavelength to the finger;
a second light source configured to emit light of a second wavelength to the finger;
a light control unit configured to control an on-state and an off-state of the first light source and the second light source;
an image sensor configured to capture reflected light from the finger with a sampling frequency to generate a plurality of
first image frames corresponding to the on-state of the first light source and a plurality of second image frames corresponding
to the on-state of the second light source; and

a processing unit configured to calculate both of the displacement of the finger for controlling a cursor and the physiological
characteristic according to the first image frames and the second image frames captured by the image sensor,

wherein in calculating the physiological characteristic, the processing unit is configured to
divide each of the first image frames into at least two parts and calculate an average brightness of each part,
analyze the average brightness of the each part of the first image frames to obtain a first intensity variation,
divide each of the second image frames into at least two parts and calculate an average brightness of each part,
analyze the average brightness of the each part of the second image frames to obtain a second intensity variation, and
calculate the physiological characteristic according to the first intensity variation and the second intensity variation.

US Pat. No. 9,304,607

POINTER POSITIONING METHOD OF HANDHELD POINTER DEVICE

PIXART IMAGING INC., Hsi...

1. A pointer positioning method of a handheld pointer device, comprising:
capturing a first image frame containing a reference point to compute a first pointing coordinate according to the image position
of the reference point formed in the first image frame;

generating a cursor parameter for controlling a display position of a cursor on a display apparatus according to the first
pointing coordinate;

recording the first pointing coordinate and positioning the display position of the cursor at the first pointing coordinate
on the display apparatus when the handheld pointer device enters a pointer-lock mode;

capturing a second image frame to compute a second pointing coordinate according to the image position of the reference point
formed in the second image frame and generating a displacement vector between the first pointing coordinate and the second
pointing coordinate when the handheld pointer device exits the pointer-lock mode; and

computing a cursor position according to the displacement vector and the first pointing coordinate for compensating an offset
between the first pointing coordinate and the second pointing coordinate, and generating the cursor parameter for controlling
the movement of the cursor based on the computational result.

US Pat. No. 9,275,610

OBJECT TRACKING APPARATUS AND CONTROL METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. An object tracking apparatus, comprising:
a reference object having a plurality of light emitting devices, wherein the plurality of light emitting devices are sequentially
turned on at different timings, for generating an optical signal;

an optical sensor for detecting the optical signal and generating an identification signal in response to the optical signal;
and

a controller for generating a control signal according to the identification signal and outputting the control signal to the
reference object, thereby adaptively adjusting a light emitting number or light emitting intensity of the plurality of light
emitting devices;

wherein, by sequentially turning on the plurality of light emitting devices at different timings, the plurality of light emitting
devices form a different shape when the optical sensor and the reference object are relatively rotated with respect to each
other at every different rotation angle, whereby the controller identifies a relative rotation between the optical sensor
and the reference object.

US Pat. No. 9,204,843

OPTICAL DISTANCE MEASUREMENT SYSTEM AND OPERATION METHOD THEREOF

PIXART IMAGING INC., Hsi...

1. An optical distance measurement system configured to detect a finger distance of a finger of a user from the optical distance
measurement system and a physiological characteristic of the user, the optical distance measurement system comprising:
a first light source configured to provide light of a first wavelength to the finger;
a second light source configured to provide light of a second wavelength to the finger;
a light control unit configured to control on-states of the first light source and the second light source;
an image sensor configured to receive reflected light from the finger at a sampling frequency to generate a plurality of first
image frames corresponding to the on-states of the first light source and a plurality of second image frames corresponding
to the on-states of the second light source; and

a processing unit configured to
calculate the finger distance and a finger motion of the finger according to the first image frames or the second image frames,
and

calculate the physiological characteristic according to the first image frames and the second image frames when the finger
distance is within a predetermined range, wherein

the finger motion is not calculated when the finger distance is within the predetermined range.

US Pat. No. 9,092,864

DISPLACEMENT DETECTION APPARATUS AND METHOD

PIXART IMAGING INC, Hsin...

1. A displacement detection apparatus, for being operated on a working surface, the displacement detection apparatus comprising:
an image sensing unit capturing a reference frame and a current frame;
a storage unit configured to save at least one displacement threshold; and
a processing unit configured to
select a first block in the reference frame and a second block in the current frame, wherein the first block and the second
block have a block size;

calculate a displacement according to the first block and the second block;
compare the displacement with the at least one displacement threshold to accordingly adjust the block size;
calculate a quality parameter of the current frame; and
determine a sub block size associated with the block size adjusted according to at least one of the quality parameter and
an exposure parameter.

US Pat. No. 9,204,043

IMAGE SENSING MODULE AND OPTICAL SIGNAL PROCESSING DEVICE

PixArt Imaging Inc., Sci...

1. An image sensing module comprising:
a first image sensor having a first scanning mode and a second scanning mode;
wherein when the first image sensor operates in the first scanning mode, the first image sensor uses a first frequency to
capture a first sense image;

wherein when the first image sensor operates in the second scanning mode, the first image sensor using a second frequency
different than the first frequency to capture the first sense image; and

a first sensing controller for determining whether the first image sensor detects an object according to the first sense image;
wherein when the first sensing controller determines that the first image sensor has not detected an object, the first sensing
controller controls the first image sensor to operate in the first scanning mode, and when the first sensing controller determines
that the first image sensor has detected the object, the first sensing controller controls the first image sensor to operate
in the second scanning mode.

US Pat. No. 9,128,543

TOUCH PAD DEVICE AND METHOD FOR DETERMINING A POSITION OF AN INPUT OBJECT ON THE DEVICE USING CAPACITIVE COUPLING

PixArt Imaging Inc., Sci...

1. A touch pad device comprising:
a substrate having opposing first and second surfaces;
a drive electrode and multiple sensing electrodes on the second surface, the multiple sensing electrodes including first and
second sensing electrodes each substantially in the shape of a right triangle positioned on the second surface such that the
first and second sensing electrodes form a rectangular arrangement with the drive electrode being situated diagonally between
a hypotenuse of the first sensing electrode and a hypotenuse of the second sensing electrode;

a plurality of conductors on the first surface, each of the conductors having a rectangular shape with each of the conductors
being positioned along a horizontal axis on the first surface such that each of the conductors is respectively situated directly
across from a portion of the first sensing electrode, a portion of the second sensing electrode, and a portion of the drive
electrode, wherein a size of the respective portions of the first sensing electrode increases in a first direction along the
horizontal axis and a size of the respective portions of the second sensing electrode decreases in the first direction along
the horizontal axis;

a drive circuit configured to generate a drive signal, the drive circuit being electrically connected to the drive electrode
to supply the drive signal to the drive electrode to generate coupling signals in the multiple sensing electrodes, the coupling
signals being dependent on any electrical contact between an input object and at least one of the conductors;

multiple signal measuring units electrically connected to the multiple sensing electrodes to measure the coupling signals
in the multiple sensing electrodes and to produce output signals; and

a processing unit connected to the multiple signal measuring units to process the output signals to determine which of the
conductors is being electrically contacted by the input object to determine a position of the input object;

wherein the touch pad device is configured such that the drive electrode generates the coupling signals in the multiple sensing
electrodes.

US Pat. No. 9,489,066

COMPUTER SYSTEM INCLUDING MOUSE DEVICE WITH ADJUSTABLE DPI BASED ON SCREEN SIZE AND OPERATING METHOD THEREOF

Pixart Imaging Inc., Hsi...

1. A computer system, comprising:
a plurality of display devices, each of the display devices having a screen size;
a host configured to detect the screen size of each of the display devices when the plurality of display devices is connected
to the host simultaneously, and output a screen size signal associated with the screen size of one of the display devices;
and

a mouse device configured to receive the screen size signal from the host and adjust a dot per inch (DPI) value of the mouse
device according to the screen size signal from the host, wherein the DPI value of the mouse device is a number of dots that
a cursor moves on the display devices corresponding to one inch displacement detected by the mouse device.

US Pat. No. 9,325,303

BUTTON DETECTING CIRCUIT

PIXART IMAGING INC., Hsi...

1. A button detecting circuit, comprises:
a determining circuit electrically connected to a voltage source, and the determining circuit comprising a pin;
a voltage selector electrically connected to the determining circuit, and the voltage selector comprising a plurality of candidate
voltages arranged in sequence based on magnitudes of the candidate voltages and forming a voltage sequence; and

a button module electrically connected to the pin, and the button module comprising a threshold unit;
wherein the voltage selector selects one of the candidate voltages and outputs the selected candidate voltage to the determining
circuit, the determining circuit receives the candidate voltage outputted from the voltage selector and outputs the candidate
voltage to the button module for testing whether the threshold unit will be conducted to find a threshold voltage; when the
threshold unit is not conducted, the determining circuit outputs a determining signal to the voltage selector such that the
voltage selector selects a next candidate voltage based upon the voltage sequence and outputs the candidate voltage to the
determining circuit; when the threshold unit is conducted, the determining circuit outputs the determining signal to the voltage
selector such that the voltage selector selects the candidate voltage which is arranged in front of the current candidate
voltage in the voltage sequence as the threshold voltage.

US Pat. No. 9,229,579

OPTICAL TOUCH SYSTEM

Pixart Imaging Inc., Hsi...

1. An optical touch system comprising:
an image sensor configured to detect at least one object; and
a processor coupled with the image sensor, configured to determine a number of pixel clusters created by the at least one
object on an image generated by the image sensor, and configured to recognize a gesture mode when the number of pixel clusters
is greater than a predetermined pixel cluster number.

US Pat. No. 9,194,740

IMAGE RETRIEVING APPARATUS AND OPTICAL DISPLACEMENT ESTIMATING APPARATUS

PixArt Imaging Inc., Sci...

1. An optical displacement estimating apparatus, comprising:
a light source, for transmitting incident light to a finger without utilizing any medium besides air, such that the light
emits from the finger to generate passing-through light; and

a sensor, for capturing a finger print image of the finger according to the passing-through light, wherein the finger print
image comprises at least one finger print protruding part image and at least one finger print concave part image;

a processing circuit, configured to perform displacement estimating to the finger according to images at different timings;
a light isolating device, located between the sensor and the finger, for isolating light from least one direction, wherein
the sensor still can receive the passing-through light via the light isolating device;

a cover, wherein part of the cover is below the sensor and the light isolating device is above the sensor and all the cover.

US Pat. No. 9,176,603

INTERACTIVE POINTING DEVICE CAPABLE OF SWITCHING CAPTURE RANGES AND METHOD FOR SWITCHING CAPTURE RANGES

PIXART IMAGING INC., Hsi...

1. An interactive pointing device capable of switching capture ranges, comprising:
an image capturing element, capable of operating with a first capture range or a second capture range, for capturing an optical
signal from an external light source, and outputting an image signal from the optical signal based on the first capture range
or the second capture range; and

a processing unit, for responding to a switching signal,
wherein when the switching signal is in a first mode, the processing unit controls the image capturing element to capture
the optical signal with the first capture range, and the processing unit calculates a first coordinate data based on the image
signal from the optical signal, and when the switching signal is in a second mode, the processing unit controls the image
capturing element to capture the optical signal with the second capture range, and the processing unit calculates a second
coordinate data based on the image signal from the optical signal, wherein the first capture range is corresponding to a first
sensing angle, and the second capture range is corresponding to a second sensing angle.

US Pat. No. 9,152,272

MULTIPOINT POSITIONING METHOD FOR TOUCHPAD

PIXART IMAGING INC., Hsi...

1. A multipoint positioning method for a touchpad, comprising:
scanning a touchpad to retrieve two-dimensional data;
calculating an object area and a number of maxima of local maxima in the two-dimensional data;
comparing the object area with an area threshold when the number of maxima is larger than 1; and
identifying positions of the local maxima as a plurality of contact positions when the object area is larger than or equal
to the area threshold.

US Pat. No. 9,151,599

IMAGE SENSING MODULE ADAPTED TO COMPENSATE TEMPERATURE VARIATION

PIXART IMAGING INC., Hsi...

1. An image sensing module, comprising:
an image sensing device configured to acquire an operation image containing an object image, wherein the operation image has
a plurality of pixels; and

a calculation device configured to
store a look-up table regarding a temperature related parameter and a position deviation of the object image at each of all
the plurality of pixels associated with the temperature related parameter, wherein the temperature related parameter comprises
a position difference between at least one reference position and at least one pixel at which the object image locates corresponding
to different temperatures,

select the position deviation from the look-up table according to the temperature related parameter corresponding to a current
position difference of the object image obtained from the acquired operation image, and

correct a current position of the object image in the operation image according to the selected position deviation.

US Pat. No. 9,093,342

OPTICAL SENSOR CAPABLE OF DETECTING IR LIGHT AND VISIBLE LIGHT SIMULTANEOUSLY

PixArt Imaging Inc., Sci...

1. An optical sensor, comprising:
an image sensor, comprising:
a first pixel coated with two optical films, wherein a first optical film is configured to block light whose wavelength is
outside a first predetermined range, and a second optical film is on the first optical film and configured to block light
whose wavelength is outside a second predetermined range; and

a second pixel without being coated with any optical film; and
a processing unit configured to simultaneously receive pixel data measured by the first pixel and the second pixel and generate
an electrical signal accordingly, wherein the first predetermined range and the second predetermined range are not overlapped.

US Pat. No. 9,063,219

OPTICAL TOUCH SYSTEM

Pixart Imaging Inc., Hsi...

1. An image system comprising:
a light source configured to illuminate an object comprising at least one portion;
an image sensing device configured to generate a picture comprising an image produced by the object, wherein the image comprises
at least one part corresponding to the at least one portion of the object; and

a computing apparatus configured to determine an intensity value representing the at least one part of the image and to determine
at least one distance between the at least one portion of the object and the image sensing device using the intensity value
and a dimension of the at least one part of the image, wherein the picture is obtained by subtracting a picture that is taken
when the light source is turned off from a picture that is taken when the light source is turned on.

US Pat. No. 9,456,147

VIDEO GENERATING SYSTEM WITH MULTIPLE IMAGE SENSORS AND RELATED METHOD THEREOF

PixArt Imaging Inc., Hsi...

1. A video generating system, comprising:
a plurality of image sensors, arranged to generate a plurality of images and a plurality of synchronization signals corresponding
to the images;

a combining circuit, coupled to the image sensors, arranged to generate a plurality of output images according to the images,
and generate a plurality of output synchronization signals corresponding to the output images according to the synchronization
signals; and

a bus, coupled between the image sensors and the combining circuit, arranged to perform signal transmission;
wherein the image sensors comprise a first image sensor and a second image sensor; and when the combining circuit receives
image data of at least a first image generated by the first image sensor, the combining circuit does not receive image data
of at least a second image generated by the second image sensor at the same time; and the combining circuit transmits a first
control signal to each of the first image sensor and the second image sensor for determining when the first image sensor is
allowed to utilize the bus to perform signal transmission with the combining circuit and determining when the second image
sensor is allowed to utilize the bus to perform signal transmission with the combining circuit.

US Pat. No. 9,432,600

SENSOR DEVICE WITH DARK CURRENT COMPENSATION AND CONTROL METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. A sensor device with dark current compensation, comprising:
a sensor circuit, for sensing a physical property or a chemical property to generate an analog sensing signal;
a dark current compensation circuit, which is coupled to the sensor circuit, for processing the analog sensing signal according
to a reference signal and generating an analog compensated signal; and

a conversion circuit, which is coupled to the dark current compensation circuit, for generating a digital sensing signal according
to the analog compensated signal.

US Pat. No. 9,244,540

OPTICAL MINI-MOUSE

Pixart Imaging Inc., Hsi...

1. An optical mini-mouse, for being operated on a work surface, the optical mini-mouse comprising:
a mouse case comprising an operating region and an accommodation space arranged along a length direction, wherein a thickness
of the accommodation space is between 0.7 cm and 1.3 cm, a width of the operating region is between 4 cm and 6 cm, and a thickness
of the operating region is smaller than the thickness of the accommodation space;

a navigation module disposed inside the accommodation space and configured to detect a movement of the optical mini-mouse
with respect to the work surface; and

a finger detection unit configured to detect at least one of a click event and a slide event in the operating region.

US Pat. No. 9,218,091

OPTICAL TOUCH PANEL ASSEMBLY AND LIGHT SENSOR THEREOF

PIXART IMAGING INC., Hsi...

1. An optical touch panel assembly comprising:
a touch panel;
two light sensors oppositely disposed at two sides of the touch panel, each light sensor comprising:
a case having a light incident side facing toward the touch panel;
a light reflective layer covered on parts of the light incident side to cause the light incident side to form a light incident
area uncovered by the light reflective layer and a light reflective area covered by the light reflective layer and located
beside the light incident area, wherein a majority portion of the light incident side is covered by the light reflective layer
to form the light reflective area for reflecting light, and a minority portion of the light incident side is uncovered by
the light reflective layer to form the light incident area for allowing light passing through; and

a light sensing component disposed within the case and having a light sensing surface facing toward the light incident area;
and

two light sources respectively disposed on two outer surfaces of the cases of the light sensors, the outer surfaces opposite
and parallel to bottom surfaces of the cases, and the bottom surfaces resting on the touch panel, wherein the light source
disposed on the outer surface of one of the cases is configured to directly emit a light into the light incident side of the
other one of the cases and the light reflective layer covered on the light incident side of one of the cases is configured
to reflect the light emitted by the light source disposed on the outer surface of the other one of the cases.

US Pat. No. 9,442,583

OPTICAL MOUSE APPARATUS AND DATA COMPRESSION METHOD USED IN OPTICAL MOUSE APPARATUS

PixArt Imaging Inc., Hsi...

1. An optical mouse apparatus, comprising:
a light source circuit, arranged for generating and emitting an optical signal, wherein the optical signal is emitted upon
a surface and then forms an optical reflected signal;

a sensing circuit, arranged for estimating an image displacement of the optical mouse apparatus according to the optical reflected
signal; and

a processing circuit, coupled to the light source circuit and the sensing circuit, the processing circuit arranged for generating
and outputting a control signal to a host terminal according to the image displacement outputted by the sensing circuit;

wherein the sensing circuit is further arranged for detecting at least one of a moving speed and a displacement direction
of the image displacement of the optical mouse apparatus to dynamically determine whether to compress data of the image displacement
outputted to the processing circuit for reducing a data amount read by the processing circuit; the data of the image displacement
is composed of a low-byte data and a high-byte data; when the sensing circuit detects that the moving speed is lower than
a threshold, the sensing circuit generates a corresponding detection result, generates a compressed data by compressing the
data of the image displacement outputted to the processing circuit according to the corresponding detection result, and outputs
the corresponding detection result for notifying the processing circuit to receive and read the compressed data; the data
amount read by the processing circuit is reduced by the sensing circuit by discarding or ignoring the high-byte data for compressing
the data of the image displacement, where the high-byte data is not outputted to the processing circuit.

US Pat. No. 9,599,988

ADAPTED MOBILE CARRIER AND AUTO FOLLOWING SYSTEM

PIXART IMAGING INC., Hsi...

1. An adapted mobile carrier configured to track a guiding light source, the adapted mobile carrier having an axis and comprising:
a sensing module comprising a first image sensor and a second image sensor, wherein the first image sensor is disposed at
a first side of the axis and configured to sense the guiding light source and generate at least one first image, the second
image sensor is disposed at a second side of the axis and configured to sense the guiding light source and generate at least
one second image; and

a mobile module comprising a driving unit configured to control at least one of turning of a travel direction, a travel speed
and a travel time interval of the mobile module according to imaging positions of the guiding light source in the first image
and the second image.

US Pat. No. 9,519,380

HANDWRITING SYSTEMS AND OPERATION METHODS THEREOF

PIXART IMAGING INC., Hsi...

1. A handwriting system, comprising:
a light source module configured to provide a light source to illuminate an object on a plane;
an image sensing apparatus disposed on the plane and configured to capture an image of the object reflecting lights emitted
by the light source; and

a processing circuit electrically connected to the image sensing apparatus and configured to receive the image captured by
the image sensing apparatus, analyze a shape of at least one light spot in the captured image, and screen out at least one
light spot not conforming to the shape of the object according to an aspect ratio of the at least one light spot in the captured
image,

wherein when a merged light spot having a width shorter than a threshold at a position is located, the processing circuit
is configured to divide the merged light spot into two individual light spots at the position, and determine whether each
of the two individual light spots has image characteristics conforming to the shape of the object.

US Pat. No. 9,435,886

PROXIMITY SENSOR INCLUDING ENCLOSED ACCOMMODATION SPACE WITH SEALED LIGHT PASSAGE AND MANUFACTURING METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. A proximity sensor, comprising:
a transmitter unit, for transmitting a light signal;
a receiver unit, for receiving the light signal reflected by an object to determine a proximity status of the object; and
a housing having at least a portion which defines an enclosed receiver accommodation space for surrounding and accommodating
the receiver unit, wherein the portion of the housing defining the enclosed receiver accommodation space includes a sealed
first light passage made of a light-transmissible material, and the light passage is provided for the light signal reflected
by the object to pass through;

wherein the housing includes a portion made of the light-transmissible material whose surface is partially covered by the
light shielding material such that the uncovered light-transmissible material forms the first light passage, and the enclosed
receiver accommodation space formed by the housing is larger than the receiver unit so that there is empty space around the
receiver unit, wherein the housing includes a top cover and at least one partition wall both made of the light-transmissible
material, and the light shielding material includes at least one side shielding layer and a top shielding layer, wherein the
at least one side shielding layer is adhered to the partition wall and the top shielding layer is adhered to a bottom surface
of the top cover, or the at least one side shielding layer is adhered to the partition wall and the top shielding layer is
adhered to a bottom surface and a top surface of the top cover.

US Pat. No. 9,423,887

METHOD OF ADJUSTING SAMPLING PRECISION OF A NAVIGATION DEVICE, RELATED NAVIGATION DEVICE AND RELATED TERMINAL DEVICE

PixArt Imaging Inc., Hsi...

1. A method of adjusting sampling precision of a navigation device, the sampling precision representing counts per inch (CPI)
or dots per inch (DPI) of the navigation device, the method comprising:
determining a predetermined mode of the navigation device;
obtaining resolution of a display; and
adjusting the sampling precision according to the resolution and the predetermined mode, so that the sampling precision is
accordingly increased and decreased by variation of the resolution.

US Pat. No. 9,329,702

NAVIGATIONAL DEVICE WITH ADJUSTABLE TRACKING PARAMETER

Pixart Imaging Inc., Hsi...

1. A navigation device comprising:
an illumination source;
a CMOS image sensor directed toward a work surface on which the navigation device is being operated for capturing an image
frame of the work surface on which the navigation device is being operated with a predetermined image capture parameter;

a memory unit having a lookup table stored therein, the lookup table comprising:
a plurality of surface quality profiles of different surface categories associated with different predetermined work surfaces,
wherein each of the surface quality profiles is a surface quality distribution associated with one of the different predetermined
work surfaces with respect to a set of quality thresholds, and

a plurality sets of tracking parameters, wherein each of the surface categories is associated with one set of the tracking
parameters and each set of the tracking parameters comprises a filter size and a filter strength; and

a processor having an input coupled to the CMOS image sensor to post-process the image frame output from the CMOS image sensor,
the post-processing of the processor being configured to:

calculate surface qualities of the image frame,
compare the surface qualities of the image frame with the lookup table to determine a surface category of the work surface
on which the navigation device is being operated, and

perform a tracking operation according to the set of the tracking parameters corresponding to the surface category of the
work surface on which the navigation device is being operated.

US Pat. No. 9,201,543

OPTICAL NAVIGATING APPARATUS AND COMPUTER READABLE RECORDING MEDIA FOR PERFORMING OPTICAL NAVIGATING METHOD

PixArt Imaging Inc., Sci...

1. An optical navigating apparatus, comprising:
a displacement detecting apparatus, for determining if the optical navigating apparatus has displacement relative to an target,
and for generating a displacement signal according to the displacement;

a touch control panel, for detecting a touch control operation of a user, wherein the touch control panel has a sampling rate
and changes the sampling rate according to a control signal in an adjusting mode, wherein the sampling rate can be adjusted
according to the displacement signal, where the sampling rate correspondingly decreases when the displacement signal indicates
that the displacement increases; and

a switch, for determining if the optical navigating apparatus enters the adjustment mode.

US Pat. No. 9,405,381

OPTICAL NAVIGATING APPARATUS AND COMPUTER READABLE MEDIA CAN PERFORM OPTICAL NAVIGATING METHOD

PixArt Imaging Inc., Hsi...

1. An optical navigating apparatus, comprising:
a light source, for illuminating a surface to generate an image;
an image sensor, for catching pictures of the image; and
a controller, for computing a first estimating speed of the optical navigating apparatus according to a first picture of the
pictures and a second picture after the first picture, for defining a first group of pictures according to the first estimating
speed, wherein the first group of pictures comprises a plurality of pictures that the second picture is included in and has
a picture number defining the number of pictures in the first group of pictures, and for determining whether a selected picture
of the first group of pictures is the last picture within the first group of pictures;

wherein the controller controls at least one of parameters as following according to the first estimating speed:
a non-illuminating frequency that the light source does not illuminate the pictures in the first group of pictures;
a non-catching frequency that the image sensor does not catch the pictures in the first group of pictures;
a computing frequency that the controller computes the pictures in the first group of pictures, which are caught by the image
sensor; and

a searching range for the pictures in the first group of pictures;
wherein the controller applies at least one of the non-illuminating frequency, the non-catching frequency, the computing frequency
and the searching range, which are controlled according to the first estimating speed, to control all the pictures for the
first group of pictures.

US Pat. No. 9,280,714

USER IDENTIFICATION SYSTEM AND METHOD FOR IDENTIFYING USER

PIXART IMAGING INCORPORAT...

1. An identification system for identifying a user by receiving a motion trajectory generated by the user, the identification
system comprising:
an image sensor for capturing a plurality of images of the motion trajectory generated by the user in a repetitive circular
motion;

a storage unit for storing motion vector information of a group of users including or not including the user generating the
motion trajectory, wherein each of the motion vector information includes a trajectory of said repetitive circular motion;
and

a comparing unit for comparing the plurality of images with the motion vector information to identify the user according to
a habitual pattern of the user of said repetitive circular motion, so that different users are differentiated according to
different habitual patterns.

US Pat. No. 9,274,614

OPTICAL MOUSE APPARATUS BASED ON IMAGE VARIATION AND RELATED METHOD THEREOF

PixArt Imaging Inc., Sci...

1. An optical mouse apparatus, comprising:
a light source unit, arranged for generating and emitting an optical signal, wherein the optical signal is emitted upon a
surface and then reflected to form an optical reflected signal;

a sensing unit, arranged for generating a sensed image output according to the optical reflected signal, wherein the sensed
image output is utilized for estimating an image displacement of the optical mouse apparatus; and

a processing unit, coupled to the light source unit and the sensing unit, the processing unit arranged for controlling the
light source unit to emit the optical signal and determining an operation status of the optical mouse apparatus according
to an image variation of at least a partial region of each of a plurality of consecutive images of the sensed image output;

wherein the processing circuit configures a first predetermined brightness threshold and a second predetermined brightness
threshold that is lower than the first predetermined brightness threshold; the processing circuit determines that the optical
mouse apparatus is being placed on the surface when detecting that an actual image brightness of the sensed image sequentially
becomes lower than the second predetermined brightness threshold, between the first and second predetermined brightness thresholds,
and higher than the first predetermined brightness threshold; and, the processing circuit determines that the optical mouse
apparatus is being lifted in to air when detecting that the actual image brightness of the sensed image sequentially becomes
higher than the first predetermined brightness threshold, between the first and second predetermined brightness thresholds,
and lower than the second predetermined brightness threshold and further detecting that an image exposure trend of the actual
image brightness increases.

US Pat. No. 9,229,578

IMAGE SENSOR AND OPTICAL TOUCH SYSTEM INCLUDING THE SAME

Pixart Imaging Inc., Hsi...

1. An image sensor comprising:
a plurality of light detecting elements arranged in a plurality of rows and a plurality of columns, wherein each column at
least comprises a first light detecting element having a first effective light collecting area and a second light detecting
element having a second effective light collecting area different from the first effective light collecting area, and the
first light detecting element and the second light detecting element are configured to detect the same illumination of light;

wherein the image sensor generates a flat field picture comprising a plurality of pixel rows and a plurality of pixel columns;
and

wherein in the flat field picture, an intensity standard deviation of pixels in each pixel column is greater than an intensity
standard deviation of pixels in any pixel row.

US Pat. No. 9,207,809

OPTICAL TOUCH SYSTEM AND OPTICAL TOUCH CONTROL METHOD

PIXART IMAGING INC., Hsi...

1. An optical touch system, comprising:
a touch surface configured to have a quadrilateral structure defined by a first, second, third and fourth edges connected
sequentially;

three light emitting elements disposed at the first, second and third edges, respectively, and configured to emit light to
the touch surface in a first period;

two image sensing devices disposed at an intersecting corner of the fourth and first edges and an intersecting corner of the
fourth and third edges, respectively;

two illumination devices disposed close to or inside the two image sensing devices, respectively, and configured to emit light
to illuminate the touch surface in a second period; and

a processing unit electrically connected to the two image sensing devices and configured to control the two image sensing
devices to sense the touch surface in the first period and thereby obtaining a first image and a second image, respectively,
and control the two image sensing devices to sense the touch surface in the second period and thereby obtaining a third image
and a fourth image, respectively.

US Pat. No. 9,134,117

DISTANCE MEASURING SYSTEM AND DISTANCE MEASURING METHOD

PIXART IMAGING INC., Hsi...

1. A distance measuring method for measuring an object within a predetermined depth range, the method comprising:
projecting, using a light source, a light section onto the object with a projection angle which is an angle between a projection
direction of the light section and a normal line of a surface of the object facing the light source;

sensing, using a sensor array comprising a plurality of light sensing units, reflected light from the light section on the
object;

determining the light sensing units that are to sense the reflected light from the light section on the object as a window
of interest of the sensor array according to the projection angle and the predetermined depth range;

controlling the light sensing units of the sensor array within the window of interest to output electric signals, and
controlling the light sensing units of the sensor array, which are not within the window of interest and do not sense the
reflected light from the light section on the object, not to output electric signals.

US Pat. No. 9,517,019

PHYSIOLOGY MEASUREMENT DEVICE AND SYSTEM, AND OPERATING METHOD OF WIRELESS SINGLE CHIP

PIXART IMAGING INC., Hsi...

1. An optical physiology measurement device, configured to measure physiological characteristics of a user via a skin surface
of the user, the optical physiology measurement device comprising:
a coherent light source configured to illuminate the skin surface in a first brightness value and a second brightness value
different from the first brightness value;

an image sensor configured to receive scattered light from tissues under the skin surface, output a first image frame corresponding
to the first brightness value and output a second image frame corresponding to the second brightness value; and

a processor electrically coupled to the light source and the image sensor, and configured to
calculate an intensity comparison index between the first image frame and the second image frame,
identify a contact status of the image sensor with respect to the skin surface according to a comparison result of comparing
the intensity comparison index with a threshold, and

calculate tissue perfusion according to at least one of the first image frame and the second image frame.

US Pat. No. 9,498,710

3D FEEDBACK MOUSE SENSOR

PixArt Imaging Inc., Hsi...

1. A method for providing feedback from a personal computer (PC) to a mouse, the method comprising:
providing a sensor within the mouse;
utilizing the sensor to receive signals from the PC;
providing a register coupled to the sensor, wherein the register comprises a plurality of bits, and specific signals received
from the PC trigger specific bits of the plurality of bits;

defining a plurality of areas on the mouse which can provide a feedback response, the plurality of areas corresponding to
the plurality of bits in the register; and

translating the signals from the PC to trigger specific bits within the register and thereby activate a feedback response
of at least one of the plurality of areas.

US Pat. No. 9,417,713

IMAGE-CAPTURING DEVICE FOR OPTICAL POINTING APPARATUS HAVING LARGE AND SMALL AREA IMAGE-SENSING UNITS

PIXART IMAGING INC., Hsi...

1. An image-capturing device configured for an optical pointing apparatus, comprising:
a plurality of adjacently arranged image-sensing units configured to sense an image of a surface and generate a sensing signal
being adapted to evaluate a velocity of the optical pointing apparatus, the plurality of adjacently arranged image-sensing
units including at least a first plurality of image-sensing units and a second plurality of image-sensing units, wherein each
of the image-sensing units of the first plurality occupy a physical area smaller than a physical area of each of the image-sensing
units of the second plurality, and the first plurality being positioned an adjacently separate region from the second plurality;

wherein the image-capturing device configures different arrangements of the image-sensing units to sense the image of the
surface according to different velocities of the optical pointing apparatus;

wherein when the optical pointing apparatus moves at a first velocity, the image-capturing device uses the first plurality
of image-sensing units to sense the surface, and when the optical pointing apparatus moves at a second velocity, the image-capturing
device uses the second plurality of image-sensing units to sense the surface, wherein the first velocity is lower than the
second velocity, and

wherein within the plurality of adjacently arranged image-sensing units, the first plurality of image-sensing units are positioned
in a middle region and the second plurality of image-sensing units are positioned in a circumambient region.

US Pat. No. 9,302,901

MICRO-ELECTRO-MECHANICAL SYSTEM DEVICE WITH ENHANCED STRUCTURAL STRENGTH

PIXART IMAGING INCORPORAT...

1. A MEMS device with enhanced structural strength, comprising:
a MEMS structure, including a plurality of metal layers which include a top metal layer, the top metal layer including a plurality
of metal segments which are not directly connected with one another; and

a signal transmission structure under the MEMS structure for transmitting an electric signal generated by the MEMS structure;
wherein each of the metal segments is individually connected to an adjacent metal layer through at least one supporting pillar,
and there is no dielectric layer between the metal segments and the adjacent metal layer, and wherein except the top metal
layer, the other metal layers are respectively connected to their adjacent metal layers through at least one supporting pillar,
with a dielectric layer at least partially filling between two adjacent metal layers.

US Pat. No. 9,292,130

OPTICAL TOUCH SYSTEM AND OBJECT DETECTION METHOD THEREFOR

PIXART IMAGING INC., Hsi...

1. An object detection method for an optical touch system, the optical touch system identifying at least one object according
to an image of the object blocking invisible light and an image of the object reflecting visible light, the object detection
method comprising:
acquiring a first image and a second image, wherein the first image has a brightness information and is formed by the object
blocking the invisible light, and the second image has an image feature and is formed by the object reflecting the visible
light, wherein the first image and the second image are respectively acquired by different partial areas of a same sensing
array;

calculating a representative brightness of every column of pixels in the first image according to the brightness information;
determining an object range of the object in the first image according to the representative brightness;
calculating the image feature within a pixel range in the second image after the object range in the first image is determined,
wherein a width of the pixel range in the second image is determined corresponding to a width of the object range in the first
image; and

identifying a block information of the object within the object range according to the calculated image feature within the
pixel range in the second image.

US Pat. No. 9,286,805

LANE DEPARTURE WARNING SYSTEM, LANE IDENTIFICATION APPARATUS AND RELATED METHOD THEREOF

PixArt Imaging Inc., Sci...

1. A lane departure warning system, comprising:
an image sensing device, arranged for generating a video;
an identification module, coupled to the image sensing device, arranged for referring to the video to identify a plurality
of lane lines corresponding to at least one lane and accordingly generating an identification result, wherein the identification
result is generated based on specific borderlines of the lane lines; and

a determination module, coupled to the identification module, arranged for determining a determination strategy according
to vehicle speed information, and generates a determination result according to the determination strategy and the identification
result;

wherein the lane departure warning system determines whether to issue a warning according to the determination result;
wherein when the vehicle speed information indicates that a speed of a vehicle is within a first speed range, the determination
module selects an aggressive determination strategy; and when the vehicle speed information indicates that the speed of the
vehicle is within a second speed range which is different from the first speed range, the determination module selects a defensive
determination strategy; and compared with the defensive determination strategy, the aggressive determination strategy makes
the determination module generate the determination result which indicates the vehicle has departed from lane when the identification
module identifies fewer lanes.

US Pat. No. 9,202,942

CONNECTOR OF CONNECTING LIGHT SENSOR AND SUBSTRATE AND METHOD OF FABRICATING LIGHT SENSOR

PixArt Imaging Inc., Sci...

1. A method of fabricating a light sensor, the light sensor having a sensing unit and a lens, the method comprising:
filling an underfill between the sensing unit and a carrying component for fixing the sensing unit to the carrying component,
wherein a transmission end structure of the sensing unit is contacted with and coupled to the carrying component by means
of surface mount technology and the transmission end structure is covered by the underfill;

attaching the lens on the sensing unit after the sensing unit is fixed onto the carrying component; and
filling a fixing component around the sensing unit and the lens for packaging the sensing unit and the lens.

US Pat. No. 9,197,167

AMPLIFYING CIRCUIT AND TOUCH CONTROL SENSING SYSTEM

PixArt Imaging Inc., Sci...

1. An amplifying circuit, comprising:
an amplifier, comprising a signal input terminal and a signal output terminal;
a first current providing module, for providing a first current to the signal input terminal;
a noise sensing module, for sensing a output voltage level from the signal output terminal, for controlling the first current
providing module to provide the first current if the output voltage level is less than a first low threshold value, and for
controlling the first current providing module not to provide the first current if the output voltage level is larger than
the first low threshold value; and

a second current providing module, for providing a second current to the signal input terminal;
wherein the noise sensing module controls the second current providing module to provide the second current and the first
current providing module to provide the first current if the output voltage level is less than a second low threshold value
smaller than the first low threshold value, and controls the second current providing module not to provide the second current
if the output voltage level is between the first low threshold value and the second low threshold value.

US Pat. No. 9,104,910

DEVICE AND METHOD FOR DETERMINING GESTURE AND OPERATION METHOD OF GESTURE DETERMINING DEVICE

PIXART IMAGING INC., Hsi...

1. A device for determining a gesture, comprising:
a light emitting unit configured to emit a light beam;
an image sensing device configured to capture an image of a hand reflecting the light beam; and
a processing circuit, electrically connected to the image sensing device, configured to obtain the image and determine a gesture
of the hand by performing an operation on the image;

wherein the operation comprises steps of:
selecting pixels in the image having a brightness greater than or equal to a brightness threshold;
sorting the selected pixels;
selecting a first predetermined percentage of pixels from the sorted pixels;
dividing the adjacent pixels in the first predetermined percentage of pixels into a same group; and
determining the gesture of the hand according to the number of groups of pixels.

US Pat. No. 9,063,435

EXPOSURE ADJUSTING APPARATUS, IMAGE NORMALIZING APPARATUS AND IMAGE NORMALIZING METHOD

PixArt Imaging Inc., Sci...

1. An exposure adjusting apparatus, comprising:
an image sensor, for catching an image according to an exposure parameter;
a computing apparatus, for computing an exposure amount of the image and for determining whether the exposure amount is in
a predetermined exposure range or not; and

an exposure updating apparatus;
if the exposure amount is in the predetermined exposure range, the exposure updating apparatus does not adjust the exposure
amount;

if a first exposure difference exists between the exposure amount and the predetermined exposure range, the exposure updating
apparatus generates a first adjusting amount, and if a second exposure difference exists between the exposure amount and the
predetermined exposure range, the exposure updating apparatus generates a second adjusting amount, wherein the first exposure
difference and the second exposure difference do not simultaneously exist;

wherein the exposure updating apparatus utilizes the first adjusting amount to increase or decrease the exposure parameter
to generate a first new exposure parameter if the first exposure difference exists between the exposure amount and the predetermined
exposure range, and utilizes the second adjusting amount to increase or decrease the exposure parameter to generate a second
new exposure parameter if the second exposure difference exists between the exposure amount and the predetermined exposure
range;

wherein the first adjusting amount equals to a first predetermined percentage of the exposure parameter, and the second adjusting
amount equals to a second predetermined percentage of the exposure parameter;

wherein the first exposure difference is larger than the second exposure difference, and the first predetermined percentage
is larger than the second predetermined percentage;

wherein the first new exposure parameter and the second new exposure parameter are different.

US Pat. No. 9,536,128

THIN BIOMETRIC DETECTION MODULE

PIXART IMAGING INC., Hsi...

1. A thin biometric detection module configured to detect at least one biometric characteristic of a part of human body, the
thin biometric detection module comprising:
a substrate having a substrate surface;
a chip disposed on the substrate surface and comprising a semiconductor optical detection region;
at least one light source disposed on the substrate surface; and
an abrasion-proof layer formed on a chip surface of the chip without an optical mechanism for image scaling between the substrate
surface and the abrasion-proof layer, and a distance from the chip surface to an upper surface of the abrasion-proof layer
is smaller than 100 micrometers,

wherein the upper surface of the abrasion-proof layer is configured to be directly in contact with a body surface of the part
of human body when detecting the biometric characteristic such that light emitted from the light source directly illuminates
the body surface and sequentially passes through the part of human body and the abrasion-proof layer to be detected by the
semiconductor optical detection region.

US Pat. No. 9,465,487

OPTICAL TOUCH SENSITIVE APPARATUS AND IMAGE CAPTURING APPARATUS

PIXART IMAGING INC., Hsi...

1. An optical touch sensitive apparatus, comprising:
a substrate, having an operation surface;
a plurality of image capturing lens modules, each having a light input end and a light output end, the light input end being
disposed on an edge of the substrate and located above the substrate for obtaining optical information in an objective space
above the operation surface, and the light output end being configured for outputting the optical information, wherein the
light input ends of the plurality of image capturing lens modules are disposed at four sides of the substrate;

a light detecting unit disposed under the substrate; and
an optical path switching unit disposed between the light output ends and the light detecting unit for transmitting the optical
information alternately output from the light output ends to the light detecting unit;

wherein the substrate further comprises a back surface opposite to the operation surface, and the light detecting unit and
the optical path switching unit are disposed at the back surface.

US Pat. No. 9,316,563

METHOD OF TESTING IMAGE SENSOR AND RELATED APPARATUS THEREOF

PixArt Imaging Inc., Sci...

1. A method of testing an image sensor having a plurality of sensing units, comprising:
utilizing the image sensor to capture at least a dynamic scene to generate a plurality of sensing results corresponding to
a plurality of captured images respectively, wherein each of the sensing results includes a plurality of sensing values generated
by the sensing units respectively; and

generating a testing result indicative of performance of the image sensor according to changing of the sensing results, wherein
the test result records a number of defective sensing units each having a significant change ratio exceeds a threshold, and
the significant change ratio of one sensing unit is a number of times that a significant change in the sensing values corresponding
to successive captured images happens to a given number of the captured images, wherein the step of generating the testing
result indicative of performance of the image sensor according to changing of the sensing results comprises:

performing a pre-processing operation upon the sensing results to generating a plurality of processed sensing results, wherein
each of the processed sensing results comprises a plurality of characteristic values corresponding to the sensing units respectively;
and

generating the testing result indicative of performance of the image sensor according to changing of the characteristic values,
comprising:

for each of the sensing units:
calculating a changing ratio of a characteristic value corresponding to the sensing unit in the sensing results; and
generating the testing result according to a number of sensing units each having a corresponding changing ratio falling within
a specific interval, comprising:

for each of the sensing units:
 calculating a difference between the changing ratio and a predetermined ratio to generate a ratio difference corresponding
to the sensing unit; and

 calculating an absolute value of the ratio difference; and
generating the testing result according to a number of sensing units each having a corresponding absolute value falling within
a difference interval.

US Pat. No. 9,319,216

OPERATING METHOD OF HUMAN INTERFACE DEVICE

PIXART IMAGING INC., Hsi...

1. An operating method of a human interface device, the operating method comprising:
estimating an accumulated bit number of bits between a first bit of a SYNC field and a bit immediately preceding an End-of-Packet
of a data packet in a USB data stream according to a clock signal and counting an oversampling number of the clock signal;

comparing the oversampling number and M times of the accumulated bit number when the accumulated bit number exceeds a predetermined
value;

determining a correction parameter according to a ratio between the oversampling number and the M times of the accumulated
bit number; and

calibrating, using the correction parameter, detected information obtained according to the clock signal.

US Pat. No. 9,279,823

OPTICAL ACCELEROMETER

PIXART IMAGING INC., Hsi...

1. An optical accelerometer, comprising:
a first substrate, comprising:
a frame;
a movable member, periodic slots being formed along at least one direction on the movable member to be served as a diffraction
grating; and

at least one elastic member connected between the frame and the movable member;
a second substrate disposed at one side of the first substrate and comprising at least one sensing unit configured to detect
a zero-order diffraction pattern and a first-order diffraction pattern generated by interference between coherent light coming
from another side of the first substrate and passing through the diffraction grating;

a spacer disposed between the first substrate and the second substrate and configured to define a predetermined height; and
a processing unit coupled to the sensing unit and configured to calculate a three-dimensional acceleration according to the
zero-order diffraction pattern and the first-order diffraction pattern.

US Pat. No. 9,239,261

AMBIENT LIGHT SENSING DEVICE AND METHOD

PIXART IMAGING INCORPORAT...

1. An ambient light sensing device, comprising:
at least one pixel, receiving a plurality of exposures having different exposure time durations to sense different dynamic
ranges, the exposures including an exposure of a first dynamic range (Rx) and an exposure of a second dynamic range (Ry),
wherein Ry is larger than Rx;

a read out circuit, reading the exposures and generating corresponding digital codes; and
a combination unit, combining the digital codes to generate a code combination indicating the result of ambient light detection,
wherein the code combination has a higher resolution than each of the digital codes,

wherein the code combination includes a first digital code corresponding to the exposure of a first dynamic range and a second
digital code corresponding to the exposure in the difference range, and in a two-dimensional coordinate system in which the
horizontal axis is the dynamic ranges and the vertical axis is the digital codes, the first digital code connects the second
digital code,

wherein both the first digital code and the second digital code are not multiplied by any weighting, or the first digital
code is not multiplied by any weighting whereas the second digital code is multiplied by a weighting.

US Pat. No. 9,235,279

WAKE UP METHOD AND OPTICAL INPUT DEVICE USING THE SAME

PIXART IMAGING INC., Hsi...

1. A wake up method of an optical input device, the method comprising:
a) capturing and setting a first image as a reference frame when the optical input device enters a sleep mode;
b) capturing and setting a second image as a compare frame while the optical input device operates in the sleep mode;
c) comparing the compare frame and the reference frame to generate a histogram difference;
d) determining whether a peak histogram value of the histogram difference is less than a predetermined threshold; and
e) causing the optical input device to operate in an active mode when the peak histogram value of the histogram difference
is less than the predetermined threshold;

wherein step c) further comprises:
comparing each pixel value in the compare frame with the corresponding pixel value in the reference frame;
computing the histogram difference based on the comparison result; and
obtaining the peak histogram value of the histogram difference.

US Pat. No. 9,223,078

POSITIONING SIGNAL TRANSMITTER MODULE AND ELECTRONIC PRODUCT WITH CURSOR-CONTROLLABLE FUNCTION

PIXART IMAGING INC., Hsi...

6. An electronic product with a cursor-controllable function, comprising:
a display apparatus comprising:
a display panel;
a signal-receiving element; and
a circuit unit electrically connected to the display panel and the signal-receiving element and configured to control the
display panel to display a cursor;

a positioning signal transmitter module disposed beside the display panel and comprising:
a first light-guide element having a first light-emission surface and at least a first light-incidence surface adjacent to
the first light-emission surface;

a second light-guide element having a second light-emission surface and at least a second light-incidence surface adjacent
to the second light-emission surface;

an opaque connection part connected between the first and second light-guide elements;
a first light source disposed beside the first light-incidence surface and configured to provide a first light signal to the
first light-incidence surface, and

a second light source disposed beside the second light-incidence surface and configured to provide a second light signal to
the second light-incidence surface, the first and second light signals emitting out from the first and second light-emission
surfaces, respectively; and

a cursor-controlling device comprising a sensor module for sensing the first and second light signals, the cursor-controlling
device being configured to output a control signal according to a variation of the first and second light signals sensed by
the sensor module;

wherein the circuit unit controls the movement of the cursor according to the control signal received by the signal-receiving
element;

wherein the second light-incidence surface is opposite to the first light-incidence surface, the first light-emission surface
is configured to have a size different to that of the second light-emission surface for recognizing a rotation angle of the
cursor-controlling device and the cursor may therefore be precisely controlled, the opaque connection part is formed between
the first and the second light-emission surfaces so as to define sizes of the first and second light-emission surfaces;

wherein the first light signal may only emit out from the first light-emission surface, the second light signal may only emit
out from the second light-emission surface.

US Pat. No. 9,146,627

LIFT DETECTION METHOD FOR OPTICAL MOUSE AND OPTICAL MOUSE WITH LIFT DETECTION FUNCTION

PIXART IMAGING INC., Hsi...

1. A lift detection method for an optical mouse, applicable to an optical mouse, wherein the optical mouse comprises an optical
source and an image sensor, the image sensor has a sensing surface formed by N sensing units, and the image sensor uses light
rays generated by the optical source to continuously scan and capture a plurality of images corresponding to an optical field
of a working plane facing the sensing surface, wherein N is an integer greater than 1, the method comprising:
computing an average brightness value of K pixels captured by K sensing units, which are among the N sensing units, from an
ith scanning, to obtain a first average brightness value, wherein K is a positive integer smaller than N, and i is a positive
integer;

computing an average brightness value of the K pixels captured by the K sensing units from an (i+1)th scanning, to obtain a second average brightness value; and

determining a brightness change of the K pixels in the two images captured from the ith scanning and the (i+1)th scanning according to the first average brightness value and the second average brightness value, wherein when the brightness
change is from dark to bright, a first signal indicating that a placing state of the optical mouse is a lift state is output.

US Pat. No. 9,134,812

IMAGE POSITIONING METHOD AND INTERACTIVE IMAGING SYSTEM USING THE SAME

PIXART IMAGING INC., Hsi...

1. An image positioning method, comprising:
capturing an image frame with an image sensor;
identifying a pixel or a plurality of adjacent pixels in the image frame having an intensity value larger than an intensity
threshold as at least one object image in the image frame with a processing unit, wherein the intensity threshold is dynamically
set as an average of intensity values of pixels of a previous image frame multiplied by a ratio X which is greater than zero
and less than or equal to one, and the previous image frame is captured by the image sensor;

comparing, using the processing unit, an object image size of the at least one object image with a size threshold, which is
a predetermined number of pixels, and identifying the object image having the object image size larger than the size threshold
as a reference point image; and

positioning the reference point image with the processing unit according to intensity values and pixel positions of at least
a part of pixels of the reference point image.

US Pat. No. 9,134,855

POSITIONING MODULE, OPTICAL TOUCH SYSTEM AND METHOD OF CALCULATING A COORDINATE OF A TOUCH MEDIUM

PixArt Imaging Inc., Sci...

1. A positioning module for calculating coordinates of a touch medium, the positioning module comprising:
at least one image detecting unit, the image detecting unit comprising a bottom side, a lateral side and an upper side, the
bottom side being opposite to the upper side and the lateral side being connected between the bottom side and the upper side,
the bottom side of the image detecting unit being disposed on a panel;

a first light source disposed on the panel whereon the bottom side is disposed, and the first light source being adjacent
to the lateral side for emitting a first beam;

a second light source disposed on the upper side for emitting a second beam, wherein an angle between the panel and a projection
direction of the second light source is greater than an angle between the panel and a projection direction of the first light
source; and

a processor electrically connected to the image detecting unit, the processor determining a touch status of the touch medium
according to a first image generated by the first beam, and further determining a touch position of the touch medium according
to a second image generated by the second beam, wherein the first light source and the second light source are respectively
actuated by the processor, the processor actuates the first light source to generate the first image, and determines whether
the second light source is actuated to generate the second image according to the touch status by analyzing the first image.

US Pat. No. 9,117,871

MULTI-AXIAL ACCELERATION SENSOR AND METHOD OF MANUFACTURING THE SAME

PixArt Imaging Inc., Sci...

1. A manufacturing method of a multi-axial acceleration sensor, comprising:
providing a substrate, wherein the substrate has a lead plane;
disposing a first acceleration sensor chip onto the lead plane, wherein a wire bonding plane of the first acceleration sensor
chip is perpendicular to the lead plane, comprising:

connecting a plurality of contact pads of the wire bonding plane of the first acceleration sensor chip to a plurality of contact
pads of the lead plane via a plurality of bonding wires; and

disposing a second acceleration sensor chip onto the lead plane, wherein a wire bonding plane of the second acceleration sensor
chip is in parallel with the lead plane.

US Pat. No. 10,186,048

OBJECT DISTANCE COMPUTING METHOD AND OBJECT DISTANCE COMPUTING APPARATUS

PixArt Imaging Inc., Hsi...

1. An object distance computing method, applied to an image sensor comprising a plurality of first type pixels, wherein the first type pixels comprises a first group of first type pixels and a second group of first type pixels, wherein the object distance computing method comprises:blocking a first part for each the first type pixel of the first group of first type pixels, and blocking a second part for each the first type pixel of the first group of first type pixels;
capturing a first image of an object via a non-blocked part for each the first type pixel of the first group of first type pixels;
capturing a second image of the object via a non-blocked part for each the first type pixel of the second group of first type pixels; and
computing first distance information between the object and the image sensor, according to at least one blur level for at least one of the first image, the second image and a first combined image generated by combining the first image and the second image.

US Pat. No. 9,405,460

TOUCH MOUSE SUPPORTING KEY FUNCTIONS OF KEYBOARD DEVICE AND RELATED METHOD USED IN TOUCH MOUSE

PixArt Imaging Inc., Hsi...

1. A method used in a touch mouse, comprising:
providing a touch panel having a touch area that is uncovered, the touch panel being capable of switching between a first
operation mode and a second operation mode wherein the touch panel in the first operation mode is used for moving a cursor
to a certain coordinate on a screen and in the second operation mode is used for performing a key input operation, a total
touch area corresponding to the first operation mode being larger than a total touch area corresponding to the second operation
mode, the touch panel being an optical touch panel entirely receiving image(s) of the touch area to detect contact movement
to perform navigation functions of at least one of cursor navigation and gesture;

using the touch panel to detect a touch of a user's finger on the touch area to sense and generate a touch signal; and
generating a corresponding key output signal to a host by simulating a condition of pressing at least one key of a keyboard
device according to the touch signal;

wherein the touch area is divided into a plurality of contact areas under the second operation mode, and each contact area
corresponds to at least a key of the keyboard device, and the step of generating the corresponding key output signal by simulating
the condition of pressing the at least one key of the keyboard device further comprises:

providing at least one point light source, and utilizing the point light source to emit light toward at least one contact
area within the contact areas for indicating a position of the at least one contact area;

referring to the touch signal for determining a contact area in the touch area that is touched by the user's finger, and accordingly
deciding the at least one key of the keyboard device; and

generating the corresponding key output signal to the host by simulating the condition of pressing the at least one key of
the keyboard device.

US Pat. No. 9,389,726

CLICK-EVENT DETECTION DEVICE

PIXART IMAGING INC., Hsi...

1. A click-event detection device, configured to detect a click-event of a finger, the click-event detection device comprising:
a light source configured to illuminate the finger;
a light control unit configured to control the light source to illuminate with a first brightness value and a second brightness
value;

an image sensor configured to receive reflected light from the finger at a sampling frequency to output bright image frames
corresponding to the first brightness value and to output dark image frames corresponding to the second brightness value;
and

a processing unit configured to calculate a plurality of differential image characteristics according to the bright image
frames and the dark image frames,

wherein the processing unit is configured to identify a single-click when following two conditions are satisfied sequentially:
(1) a first variation of the differential image characteristics is larger than a first varying threshold within a first time
interval; and (2) a second variation of the differential image characteristics is smaller than or equal to a second varying
threshold within a second time interval, and

wherein the processing unit is configured to identify a double-click when following four conditions are satisfied sequentially:
(1) the first variation of the differential image characteristics is larger than the first varying threshold within the first
time interval; (2) the second variation of the differential image characteristics is smaller than or equal to the second varying
threshold within the second time interval; (3) a third variation of the differential image characteristics is larger than
the first varying threshold within a third time interval; and (4) a fourth variation of the differential image characteristics
is smaller than or equal to the second varying threshold within a fourth time interval.

US Pat. No. 9,310,903

DISPLACEMENT DETECTION DEVICE WITH NO HOVERING FUNCTION AND COMPUTER SYSTEM INCLUDING THE SAME

Pixart Imaging Inc., Hsi...

15. A displacement detection device, operated on a working surface, the displacement detection device comprising:
an image sensor configured to detect reflected light from the working surface and successively output image frames;
a processing unit configured to identify a hovering height and calculate a first axis displacement and a second axis displacement
according to the image frames; and

an output unit controlled by the processing unit and configured to output a first ratio of the first axis displacement but
not to output the second axis displacement when the hovering height is higher than a predetermined height,

wherein the first ratio is 50%-100%.

US Pat. No. 9,302,907

MICRO-ELECTRO-MECHANICAL-SYSTEM DEVICE WITH GUARD RING AND METHOD FOR MAKING SAME

PIXART IMAGING INCORPORAT...

1. A method for making a MEMS device with guard ring, comprising:
providing a substrate including transistor devices, part of interconnection and MEMS structure;
forming a top dielectric layer;
forming a top metal layer, part of which forms a bond pad; and
forming a sidewall on, surrounding and connected with the bond pad, the sidewall being disposed on and along all sides of
the bond pad to extend upward from the bond pad in a direction opposing to a downward direction from the bond pad toward the
substrate, to form a guard ring extending upward from the bond pad, wherein the sidewall is made of metal or amorphous silicon
resistive to an etchant capable of etching the top dielectric layer, wherein the sidewall forms a guard ring; and

after forming the sidewall, etching part of the top dielectric layer to release the MEMS device.

US Pat. No. 9,290,374

MICRO-ELECTRO-MECHANICAL SYSTEM DEVICE HAVING DIFFERENTIAL CAPACITORS OF CORRESPONDING SIZES

PIXART IMAGING INCORPORAT...

1. A micro-electro-mechanical system (MEMS) device having differential capacitors of corresponding sizes, comprising:
a substrate;
a top fixed electrode;
a bottom fixed electrode;
a mass, including a top electrode which forms a top capacitor with the top fixed electrode and a bottom electrode which forms
a bottom capacitor with the bottom fixed electrode;

a top fixed electrode extension wall having an upper end connected to the top fixed electrode and a lower end connected to
the substrate; and

a bottom fixed electrode extension wall having a lower end connected to the substrate through the bottom electrode,
wherein the bottom fixed electrode extension wall is not connected to the top fixed electrode at any upper end of the bottom
fixed electrode extension wall, and a total of a conductive surface area of the top fixed electrode extension wall facing
the mass and a conductive surface area of the top fixed electrode facing the mass is substantially equal to a total of a conductive
surface area of the bottom fixed electrode extension wall facing the mass and a conductive surface area of the bottom fixed
electrode facing the mass.

US Pat. No. 9,280,213

OPTICAL NAVIGATION CHIP USED IN AN OPTICAL MOUSE

PixArt Imaging Inc., Inn...

1. An optical navigation system cooperated with a light source for being used in a mouse, the mouse transmitting a mouse signal
to a computer for navigation control, the optical navigation system comprising:
an optical sensing array, receiving a reflected light from a surface indicating features of the surface for generating a digital
frame corresponding to intensity variation in a two-dimensional space caused by the reflected light; and

a circuitry coupled to the optical sensing array and generating a digital displacement signal by monitoring the intensity
variation of two different digital frames, wherein the two digital frames are captured by the optical sensing array at two
different time;

wherein the digital displacement signal is zero if the intensity in the two-dimensional space variation is less than a threshold
value.

US Pat. No. 9,229,545

OPTICAL NAVIGATION APPARATUS AND OPTICAL NAVIGATION METHOD

PIXART IMAGING INC., (TW...

1. An optical navigation apparatus, comprising:
a light source unit, being configured to generate a beam of light;
an image sensing unit, being configured to capture a plurality of first images within a first time interval and a plurality
of second images within a second time interval, wherein the first time interval comes immediately after the second time interval;
and

a processing unit, being electrically connected to the light source unit and the image sensing unit and configured to determine
that the light is not projected onto a touch object within the second time interval according to the second images and the
light is projected onto the touch object within the first time interval according to the first images, activate a resolution
adjustment mechanism in response to a change from determining the light being not projected onto the touch object to determining
the light being projected onto the touch object, calculate a piece of displacement information related to the touch object
according to the first images, generate a comparison result by comparing the piece of displacement information with a first
threshold, and set a displacement resolution of the optical navigation apparatus according to the comparison result.

US Pat. No. 9,195,900

SYSTEM AND METHOD BASED ON HYBRID BIOMETRIC DETECTION

PIXART IMAGING INC., Hsi...

1. A system based on hybrid biometric detection, comprising:
a first light source being configured to provide light of different wavelengths under control to project on a user;
a first image sensor being configured to capture images of the user to generate image signals;
a recognition module being coupled to the image sensor and configured to receive the image signals, extract various biometric
informations from the images, and analyze and compare for each of the biometric informations to generate a matching score;

an analysis unit being coupled to the recognition module and configured to determine an identity for the user according to
all of the matching scores generated by the recognition module; and

a biometric detection system which comprises:
a second light source being configured to emit to illuminate a skin surface of the user;
a second image sensor being configured to receive dispensed light from the user for generating PPG signals;
a time frequency reducing unit being coupled to the second image sensor and configured to generate a time and PPG variation
signal for each frame captured by the second image sensor;

a space frequency reducing unit being coupled to the second image sensor and configured to generate a space and PPG variation
signal for each frame captured by the second image sensor;

a converting unit being coupled to the time frequency reducing unit and the space frequency reducing unit, and configured
to convert the time and PPG variation signals into frequency domain signals and determine a reference frequency according
to the space and PPG variation signals;

a capturing unit being coupled to the converting unit and configured to retrieve energy of the frequency domain signals at
the reference frequency; and

a processing unit being coupled to the capturing unit and configured to establish a three-dimensional energy distribution.

US Pat. No. 9,189,075

PORTABLE COMPUTER HAVING POINTING FUNCTIONS AND POINTING SYSTEM

Pixart Imaging Inc., Hsi...

1. A portable computer, comprising:
a display screen showing a cursor;
a first image sensor disposed on a first plane on which the display screen locates and configured to capture a first image
toward a first direction along a front of the display screen;

a second image sensor disposed on a second plane, and configured to capture a second image in a field of view thereof and
toward a second direction, wherein the second plane is not parallel to the first plane, and the second direction is different
from the first direction; and

a processing unit configured to recognize a predetermined hand posture according to the first image, activate the second image
sensor when the predetermined hand posture is recognized, control the cursor according to a hand posture position of the first
image and identify a click event of an object transversely crossing the field of view of the second image sensor according
to the second image.

US Pat. No. 9,170,693

CAPACITIVE TOUCH SYSTEM AND GAIN CONTROL METHOD THEREOF

Pixart Imaging Inc., Hsi...

1. A capacitive touch system, comprising:
a gain buffer configured to store a current gain sheet;
a multiplying circuit configured to multiply a digital detected signal associated with each sensing cell of a detection frame
by an associated gain value in the current gain sheet to respectively output an amplified detected signal;

a subtraction circuit configured to subtract the amplified detected signal associated with each sensing cell of the detection
frame from a setpoint to respectively output a first touch data; and

a control circuit configured to calculate a first gain sheet associated with the detection frame, a current roughness of the
current gain sheet and a first roughness of the first gain sheet, and to replace the current gain sheet in the gain buffer
by the first gain sheet when the first roughness is smaller than the current roughness.

US Pat. No. 9,127,930

DISTANCE MEASUREMENT SYSTEM AND METHOD

PIXART IMAGING INC., Hsi...

1. A distance measurement system, comprising:
at least one reference plane;
a light source module, providing a light beam having a speckle pattern to the at least one reference plane and an object,
so as to show a plurality of images having the speckle pattern on the at least one reference plane and a surface of the object,
wherein the speckle pattern has a plurality of speckles;

an image capture device, capturing the image shown on the reference plane to generate a reference image information, and capturing
the image shown on the surface of the object to generate an object image information; and

a processing module, coupled to the image capture device for obtaining the reference image information and the object image
information, calculating a plurality of brightness relationships between each of the speckles and adjacent speckles rounding
each speckle in the reference image information and the object image information, and using a predetermined formula to calculate
the brightness of each of the speckles and adjacent speckles rounding each speckle, in order to obtain a relative brightness
information of each of the speckles, so as to calculate the distance between the distance measurement system and the object
according to the relative brightness information;

wherein the predetermined formula is a value, which is obtained by dividing the brightness of each speckle by a summation
of the brightness of each speckle and the average of brightness of each speckle and adjacent speckles rounding each speckle.

US Pat. No. 9,092,063

ELECTRONIC SYSTEM

Pixart Imaging Inc., Hsi...

1. An electronic system comprising:
an image-sensing device comprising an image-sensing area that generates a picture comprising a noisy region; and
a processor coupled with the image-sensing device, configured to select a tracking region from the portion of the picture
outside the noisy region, wherein the tracking region corresponds to an operative region of the image-sensing area, wherein
the tracking region is an intersection region of a first region and a second region, wherein the first region comprises a
plurality of successive rows of pixels, which do not include any pixel of the noisy region, and the second region comprises
a plurality of successive columns of pixels, which do not include any pixel of the noisy region.

US Pat. No. 9,836,132

IMAGE PROCESSING METHOD CAPABLE OF DETECTING NOISE AND RELATED NAVIGATION DEVICE

PixArt Imaging Inc., Hsi...

1. An image processing method capable of detecting noise, comprising:
adjusting a lighting unit to acquire an over-exposure image;
comparing each pixel of the over-exposure image with at least one threshold value;
labeling a pixel of the over-exposure image as the noise while bright intensity of the foresaid pixel is lower than the threshold
value;

calculating a simulating value according to bright intensity of pixels adjacent to the noise by a predetermined function;
replacing bright intensity of the pixel corresponding to the noise by the simulating value; and
utilizing the simulating value and bright intensity of other pixels except the noise to execute a displacement detecting calculation.

US Pat. No. 9,588,597

OPTICAL POINTING DEVICE AND METHOD FOR DETECTING AN OPTICAL POINTING

PIXART IMAGING INC., Hsi...

1. An optical pointing device for detecting a finger's direction of a user, comprising:
a cover, comprising a press portion and a side wall, the press portion having a first surface and a second surface opposite
the first surface, the side wall extending downward from the periphery of the second surface, and the press portion and the
side wall are two separate elements;

a light source, projecting a main beam to the press portion of the cover, wherein the main beam then forms a first beam passing
through the press portion and a second beam reflected by the second surface; and

a sensor, being adapted to receive the second beam reflected by the second surface, and detect the second beam by an algorithm
to output a first displacement position;

wherein the light source and the sensor are covered by the cover, and the side wall is a flexible side wall, and the side
wall is deformable according to a horizontal movement of the press portion.

US Pat. No. 9,490,290

BACK SIDE ILLUMINATED SEMICONDUCTOR STRUCTURE WITH SEMICONDUCTOR CAPACITOR CONNECTED TO FLOATING DIFFUSION NODE

Pixart Imaging Inc., Hsi...

11. A back side illuminated semiconductor structure comprising:
a substrate having a light receiving surface;
a light sensing region, inside the substrate, configured to receive light penetrating the substrate from the light receiving
surface to generate photo-generated charges by a photoelectric effect;

a floating diffusion node, inside the substrate, configured to temporarily store the photo-generated charges generated by
the light sensing region;

a transfer gate, connected to the light sensing region and the floating diffusion node, configured to control the photo-generated
charges generated by the light sensing region to flow to the floating diffusion node; and

a semiconductor capacitor comprising a first electrode and a second electrode, wherein
the first electrode is electrically connected to the floating diffusion node through a contact,
the semiconductor capacitor is configured to temporarily store the photo-generated charges generated by the light sensing
region together with the floating diffusion node,

a cross section of the floating diffusion node is 4 to 5 times of that of the contact, and
the first electrode of the semiconductor capacitor is configured as a light reflection layer to reflect light not being absorbed
in a first penetration of the light sensing region back to the light sensing region.

US Pat. No. 9,454,257

ELECTRONIC SYSTEM

PIXART IMAGING INC., Hsi...

1. An electronic system comprising:
a device comprising a unitary screen integrated into the device, the screen having defined thereon a plurality of regions;
and

an optical touch device configured to detect activity of an object touching the screen, the optical touch device being configured
to generate first data when the object performs a gesture touching and moving along a surface of a first region of the screen
and to generate second data when the object performs a gesture touching and moving along a surface of at least a second region
of the screen, wherein

the first data and the second data are of different data types,
the first region is separate from the second region,
the optical touch device is configured to generate a first gesture event in response to the gesture being performed touching
and moving along the surface of the first region that is different from a second gesture event generated in response to the
same gesture being performed touching and moving along the surface of the second region, and

the optical touch device is further configured to generate at least one of a track point and a pointing stick event in response
to the object touching a predetermined operation m point defined in one of the first and second regions, the at least one
of a track point and a pointing stick event being determined based on a posture of the object while touching the predetermined
operation point.

US Pat. No. 9,323,347

OPTICAL POINTING SYSTEM

PIXART IMAGING INC., Hsi...

1. An optical pointing system, comprising:
at least one reference beacon;
an image sensor configured to capture an image frame containing a beacon image associated with the at least one reference
beacon;

a storage unit configured to save image data of at least one object image in the image frame; and
a processing unit configured to sequentially process every pixel of the image frame within a scan period for identifying the
at least one object image, and when two object images simultaneously appear within a clearance range of the image frame within
the scan period, remove image data, saved in the storage unit, associated with the two object images within the clearance
range,

wherein the clearance range is a pixel region extending outward from an edge of the at least one object image to a pixel area
smaller than the image frame, and the two object images are separated from each other in the image frame.

US Pat. No. 9,223,407

GESTURE RECOGNITION APPARATUS AND COMPLEX OPTICAL APPARATUS

PIXART IMAGING INCORPORAT...

1. A gesture recognition apparatus, comprising:
a substrate;
a light emitting device for emitting a light beam according to a first clock signal;
an image sensor for receiving the light beam reflected by a movement of an object according to a second clock signal to generate
an object image; and

a processing unit for recognizing the object image detected by the image sensor to provide a command signal;
wherein the image sensor and the processing unit are disposed on a same substrate and integrated into a same module, whereby
the module directly outputs the command signal without outputting the object image, and a data amount of the command signal
outputted from the processing unit is smaller than a data amount of the object image; and wherein there is a correlation between
a period of the first clock signal and a period of the second clock signal.

US Pat. No. 9,150,403

MEMS MICROPHONE DEVICE AND METHOD FOR MAKING SAME

PIXART IMAGING INCORPORAT...

1. A MEMS microphone device, comprising:
a substrate including a first cavity;
a MEMS device region above the substrate, wherein the MEMS device region includes at least one metal layer, at least one metal
via layer, an insulating material region and a second cavity, wherein a portion of the at least one metal layer and a portion
of the at least one metal via layer form a membrane and the second cavity is formed below the membrane;

a mask layer above the MEMS device region;
a first lid having at least one opening communicating with the second cavity and the first cavity, the first lid being fixed
above the mask layer; and

a second lid fixed under the substrate.

US Pat. No. 9,152,242

OPTICAL NAVIGATOR DEVICE AND ITS TRANSMISSION INTERFACE INCLUDING QUICK BURST MOTION READOUT MECHANISM

Pixart Imaging Inc., Hsi...

1. A transmission interface having a quick burst motion readout mechanism and configured to be applied between a master device
and a slave device, the transmission interface comprising:
a trigger channel configured to allow the master device to transmit a trigger signal to the slave device before transmission
of data; and

a data transmission channel configured to allow the slave device to transmit readable data to the master device after the
slave device receives the trigger signal;

wherein the master and slave devices are adapted to a predetermined data transmission protocol by which the readable data
is directly transmitted and not accompanied by address data related to the readable data.

US Pat. No. 9,141,204

DYNAMIC SCALE FOR MOUSE SENSOR RUNAWAY DETECTION

PixArt Imaging Inc., Sci...

1. A method for dynamically setting a scale for performing a cross-correlation check between a reference image and a comparison
image of a mouse, the method comprising:
setting a plurality of scale sizes fora cross-correlation check, the plurality of scale sizes corresponding to a plurality
of predicted locations for cross-correlation, respectively;

determining a velocity of motion of the mouse, and using the determined velocity to generate a predicted location for performing
cross-correlation;

selecting a scale size according to the predicted location; and
performing the cross-correlation check according to the scale size.

US Pat. No. 9,093,343

IMAGE SENSOR DEVICE AND METHOD FOR MAKING SAME

PIXART IMAGING INCORPORAT...

1. A method for making an image sensor device, comprising:
providing a substrate;
forming an image sensor area in the substrate;
forming a masking layer above the image sensor area;
depositing a dielectric layer above the masking layer;
etching the dielectric layer until the masking layer, such that a light passage is formed above the masking layer;
retaining at least a part of the masking layer without removing it; and
forming an optical resonator in the light passage, wherein the optical resonator includes an upper reflective layer and a
lower reflective layer, the lower reflective layer being formed by the masking layer.

US Pat. No. 9,075,537

COMMUNICATION METHOD APPLIED TO TRANSMISSION PORT BETWEEN ACCESS DEVICE AND CONTROL DEVICE FOR PERFORMING MULTIPLE OPERATIONAL COMMAND FUNCTIONS AND RELATED ACCESS DEVICE THEREOF

PixArt Imaging Inc., Sci...

1. A communication method applied to a transmission port between an access device and a control device, comprising:
selecting one as a specific command according to a plurality of types of commands of the access device, the commands including
a single write register command, a single read register command, a burst read motion data command, a multi-write register
command, a multi-read register command, a status report command, an image read-out command, and a status reset command;

using one of the access device and control device to encode the specific command to generate a mode data;
using the one of the access device and control device to generate an output data according to content of the mode data and
content of a command data corresponding to the specific command; and

transmitting the output data from the one of the access device and control device to another one of the access device and
control device via the transmission port;

wherein the another one of the access device and control device is utilized to receive the output data, decode the mode data
of the output data to generate a decoding result, and select the specific command from a plurality of different operational
commands according to the decoding result for executing a communication function corresponding to the specific command.

US Pat. No. 9,058,064

INTERACTIVE IMAGE SYSTEM, INTERACTIVE CONTROL DEVICE AND OPERATION METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. An interactive image system, comprising:
a host generating interactive images;
a light source generating at least one light beam; and
an interactive control device transmitting data to the host and switching between an operation status and an idle status,
the interactive control device including:

an image sensor capturing a first picture in the idle status, wherein the first picture has a reference point image formed
by the light beam; and

a control circuit selecting a pixel area according to a position of the reference point image in the first picture, wherein
a size of the pixel area is smaller than a size of the first picture, controlling the image sensor to obtain a second picture
by simply and only scanning the pixel area while leaving another pixel area other than the pixel area not-scanned, and comparing
a threshold value with brightness information of at least one pixel in the pixel area of the second picture to confirm whether
the interactive control device is still in the idle status;

wherein when the brightness information of the at least one pixel in the pixel area of the second picture is smaller than
the threshold value, the interactive control device switches from the idle status to the operation status; and

when the brightness information of the at least one pixel in the pixel area of the second picture is larger than the threshold
value, the interactive control device is still in the idle status.

US Pat. No. 10,033,956

IMAGE SENSOR

PIXART IMAGING INC, Hsin...

1. An image sensor, comprising:a plurality of pixel circuits arranged in a matrix, each of the pixel circuits comprising:
an optoelectronic conversion circuit configured to generate a photocurrent;
a pixel buffer circuit configured to receive the photocurrent within a first exposure time to store a first charge and store the first charge for a selectable storage interval, and receive the photocurrent within a second exposure time to store a second charge, wherein the selectable storage interval is between the first exposure time and the second exposure time; and
a plurality of output circuits, each of the output circuits coupled to one pixel circuit column via a readout line and comprising:
a first storage circuit configured to store a first output voltage formed by reading the first charge in the pixel buffer circuit within a readout interval;
a second storage circuit configured to store a second output voltage formed by reading the second charge in the pixel buffer circuit within the readout interval; and
a differential unit configured to compare, within the readout interval, the first output voltage with the second output voltage to output an analog image signal.

US Pat. No. 9,588,605

TRACKING METHOD AND OPTICAL INPUT DEVICE USING THE SAME

PIXART IMAGING INC., Hsi...

1. A tracking method, adapted for tracking a movement of an optical input device, the tracking method comprising:
a) capturing a first image as a reference frame and an input image subsequent to the first image as a compare frame while
the optical input device operates;

b) computing correlation between the compare frame and the reference frame for a first correlation window to obtain a first
peak correlation value;

c) computing another correlation between the compare frame and the reference frame for a second correlation window when the
first peak correlation value obtained is located at a corner of the first correlation window to determine whether the first
peak correlation value is the maximum correlation value between the compare frame and the reference frame, wherein the second
correlation window is a predetermined region of the compare frame centering on the position of the first peak correlation
value; and

d) computing a displacement information of the optical input device based on the pixel position associated with a second peak
correlation value identified in the compare frame when it is determined that the second peak correlation value of the second
correlation window computed is larger than the first peak correlation value.

US Pat. No. 9,489,077

OPTICAL TOUCH PANEL SYSTEM, OPTICAL SENSING MODULE, AND OPERATION METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. An optical touch panel system for recognizing a track of an object to determine a corresponding gesture function, comprising:
a touch control surface for the object to move on or above to form the track, the track having a starting point, an ending
point and a path connecting the starting point and the end point, the touch control surface including at least two touch control
areas, wherein each touch control area does not overlap and is distinguishable from any other touch control area, and the
at least two touch control areas are adjacent to each other and there is a boundary between the at least two touch control
areas, and the path includes a continuous trajectory which passes the at least two touch control areas and the boundary between
the at least two touch control areas;

at least one image sensor for capturing a plurality of continuous pictures including images of the object; and
a processor for determining which touch control area is exclusively active according to all of the track of the object in
the pictures, and recognizing all of the track to execute a corresponding single gesture function which is pre-defined in
association with the exclusively active touch control area, wherein a plurality of different gesture functions are provided
in each touch control area when the touch control area is active, and the corresponding single gesture function is determined
according to the path;

wherein the processor determines the touch control area to be exclusively active according to whether all of the track has
a higher ratio existing in this touch control area than existing in another touch control area, and wherein at least one gesture
function which is pre-defined in association with the exclusively active touch control area is different from at least one
gesture which is pre-defined in association with another inactive touch control area.

US Pat. No. 9,189,106

OPTICAL TOUCH PANEL SYSTEM AND POSITIONING METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. An optical touch panel system for positioning an object in a touch control area, the system comprising:
a reflective element disposed on a first side of the touch control area for reflecting light from the touch control area;
two lighting elements respectively disposed on a second side and a third side of the touch control area, wherein the second
side and the third side are adjacent to each other, and the third side is opposite the first side;

a first light projection apparatus including a planar mirror and a light generator, disposed on the first side and at a location
adjacent to a fourth side of the touch control area, wherein the planar mirror and the reflective element are adjacent to
each other and at a same side of the touch control area;

an image sensor capturing a first picture and a second picture respectively when the light generator is inactivated and activated,
the light generator being inactivated and activated when the object is between the first light projection apparatus and the
image sensor, wherein when the light generator is inactivated, the planar mirror reflects light external to the first light
projection apparatus, and when the light generator is activated, light generated from the light generator goes through the
planar mirror, the first light projection apparatus selectively operating to reflect light or to let light pass; and

a processor calculating a coordinate of the object according to optical information of an object and a mirror image of the
object in the first picture and the second picture, wherein the optical information of the object is a projected image of
the object (projected object image) and the optical information of the mirror image is a projected image of the mirror image
(projected mirror image).

US Pat. No. 9,134,844

OPTICAL TOUCHPAD WITH POWER SAVING FUNCTIONS BASED ON DETECTED LIGHT

PixArt Imaging Inc., Sci...

1. An optical touchpad comprising:
a light source for emitting a specific-light;
a specific-light sensing array for sensing reflected light of the specific-light reflected by an instruction object to generate
a signal of a specific-light sensing image that indicates that the reflected light of the specific-light reflected by the
instruction object is sufficient for the specific-light sensing array to sense the specific-light sensing image;

a proximity detector for determining an instruction distance between the instruction object and the optical touchpad according
to the signal intensity of the specific-light sensing image, wherein the higher the signal intensity of the specific-light
sensing image, the closer the instruction distance is, up to the instruction object contacting the optical touchpad, and the
proximity detector generates a control signal according to the signal intensity of the specific-light sensing image;

a motion detector independent from the proximity detector for determining a motion path of the instruction object according
to motion of the signal of the specific-light sensing image over the specific-light sensing array for outputting an instruction
object motion signal;

an environmental light sensing array for sensing light near the optical touchpad to output a signal of an environmental light
sensing image; and

an environmental light detector for adjusting intensity of the specific-light emitted by the light source according to the
signal of the environmental light sensing image, wherein the signal of the environmental light sensing image represents intensity
of light near the optical touchpad;

wherein when the signal intensity of the specific-light sensing image weakens to less than a predetermined value while still
being strong enough for the specific-light sensing array to sense the reflected light of the specific-light reflected by the
instruction object, the proximity detector determines that the instruction distance is too great, and the proximity detector
issues the control signal to the motion detector to turn off the motion detector while keeping the proximity detector and
the environmental light detector turned on, and when the motion detector is turned on, the environmental light detector is
turned off.

US Pat. No. 9,052,780

OPTICAL TOUCH SCREEN SYSTEM AND SENSING METHOD FOR THE SAME

Pixart Imaging Inc., Hsi...

1. An optical touch screen system comprising:
a touch screen;
an image-sensing device generating a plurality of light-shielding information of an object at a plurality of time points;
and

a processing device coupled to the image-sensing device, comprising a computing unit configured to generate a projected size
difference value according to the plurality of light-shielding information, wherein the projected size difference value is
generated by subtracting a first projected size of the object on the touch screen from a second projected size of the object
at two different time points,

wherein a projected size is a diameter of a circle representing a projection of the object,
wherein the processing device comprises a coordinate calculation unit configured to compute coordinates of the object according
to the plurality of light-shielding information generated by the image-sensing device when the image-sensing device detects
the object, and

wherein the processing device does not output the coordinates when the projected size difference value is larger than a threshold
level.

US Pat. No. 10,119,843

OPTICAL DETECTING DEVICE CAPABLE OF DETERMINING SHIFT OF A MULTI-AXIS INSTRUCTION OUTPUTTING MECHANISM

PixArt Imaging Inc., Hsi...

1. An optical detecting device capable of determining gearshift, comprising:a multi-axis instruction outputting mechanism, an actuating component of the multi-axis instruction outputting mechanism being shifted in reciprocation at a first operating direction to output a corresponding instruction; and
an optical detecting module disposed adjacent by the actuating component, an interval between the optical detecting module and the actuating component being varied according to a relative movement between the optical detecting module and the actuating component at a second operating direction, the actuating component being arbitrarily shifted between different gears, the optical detecting module determining the interval and related gearshift according to parameter variation of a reflecting signal actuated by the actuating component and utilizing the reflecting signal to acquire a movement of a feature point on the actuating component along the first operating direction so as to interpret the instruction, wherein the first operating direction is different from the second operating direction.

US Pat. No. 10,057,516

IMAGE SENSOR AND IMAGE CAPTURE DEVICE SUPPORTING ROLLING SHUTTER MECHANISM AND GLOBAL SHUTTER MECHANISM

PIXART IMAGING INC., Hsi...

1. An image sensor, connected to an analog-to-digital converter array, wherein the analog-to-digital converter array comprises a plurality of comparators, the image sensor comprising:an image sensing array, capturing image data, comprising a plurality of pixels, wherein the image sensing array supports both a rolling shutter mechanism and a global shutter mechanism; and
a voltage supply array, connected to the analog-to-digital converter array, comprising a plurality of voltage supply circuits to provide a dummy voltage;
wherein during an auto-zero period, the voltage supply array provides the dummy voltage to the analog-to-digital converter array, the comparators execute an auto-zero function according to the dummy voltage, the image sensing array outputs the image data to the analog-to-digital converter array after the comparators complete the auto-zero function, and the analog-to-digital converter array makes the image data be digital.

US Pat. No. 9,628,698

GESTURE RECOGNITION SYSTEM AND GESTURE RECOGNITION METHOD BASED ON SHARPNESS VALUES

Pixart Imaging Inc., Hsi...

1. A gesture recognition system, comprising:
a zoom lens configured to adjust a focus length thereof in response to a control signal;
an image sensor configured to capture an image frame through the zoom lens;
a memory unit configured to previously save, in association with at least one focus length corresponding to the control signal,
a lookup table of a plurality of depths of an object from the image sensor versus a plurality of sharpness values, each of
the sharpness values at one of the depths; and

a processing unit configured to
calculate a current sharpness value of at least one object image in the captured image frame according to the captured image
frame, and

obtain a current depth of at least one object captured by the image sensor and associated with the at least one object image
according to the lookup table.

US Pat. No. 9,518,884

MICRO-ELECTRO-MECHANICAL DEVICE AND METHOD FOR MAKING THE SAME

PIXART IMAGING INCORPORAT...

1. A micro-electro-mechanical device, comprising:
a substrate, a first metal layer above the substrate, a via layer above the first metal layer, and a second metal layer above
the via layer;

an electrode, including a plurality of vent holes; and
a diaphragm, including a planar layer and a plurality of ribs, wherein the planar layer is disposed above and in parallel
to the electrode to form a capacitive sensor with the electrode, and the ribs protrude upward and/or downward from the planar
layer such that the ribs are respectively disposed in correspondence to the vent holes, wherein the ribs are smaller than
and within the vent holes from a top view having a direction normal to the substrate, such that the ribs do not contact the
electrode and do not overlap the electrode from the top view;

wherein each of the ribs at least includes the via layer and the second metal layer which are located in correspondence to
the vent holes and are stacked such that a whole interface between the via layer and the second metal layer is in parallel
to the planar layer, and the via layer and the second metal layer are different layers from the planar layer and do not belong
to a part of the planar layer.

US Pat. No. 9,471,180

OPTICAL TOUCH PANEL SYSTEM, OPTICAL APPARATUS AND POSITIONING METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. An optical touch panel system, for positioning an object in a touch control area, the system comprising:
at least two reflective elements respectively disposed on a first side and a second side of the touch control area, wherein
the first side and the second side are adjacent to each other, and wherein the sum of lengths of the first side and the second
side is larger than the sum of lengths of the two reflective elements;

two lighting elements respectively disposed on a third side and a fourth side of the touch control area, wherein the third
side and the fourth side are adjacent to each other;

two lighting elements respectively disposed at two ends of the second side, to emit light into the touch control area;
an image sensor capturing an image of the object to form a projected object image and at least one mirror image of the object
formed by the two reflective elements to form at least one projected mirror image; and

a processor calculating coordinates of the object according to geometric information of at least two of the projected object
image and the at least one projected mirror image;

wherein the reflective element disposed on the second side occupies a middle portion of the second side and does not extend
to the two ends of the second side, whereby a straight light path between the two lighting elements respectively disposed
at two ends of the second side is blocked by the reflective element occupying the middle portion of the second side.

US Pat. No. 9,304,574

REMOTE DEVICE AND POWER SAVING METHOD OF INTERACTIVE SYSTEM

PIXART IMAGING INC., Hsi...

1. A remote device, comprising:
an image sensor configured to successively capture a first image and a second image containing at least one reference beacon
image, and capture a pretreatment image containing the at least one reference beacon image before capturing the first image;

a readout circuit configured to read first image data of the first image and second image data of the second image from the
image sensor, and read image data of partial rows of the pretreatment image from the image sensor; and

a processing unit configured to calculate an image feature of the at least one reference beacon image according to the first
image data and control the readout circuit to read only the second image data of a range of interest in the second image according
to the image feature, wherein the range of interest is smaller than the second image.

US Pat. No. 9,269,842

WAFER SCALE IMAGE SENSOR PACKAGE AND OPTICAL MECHANISM

PIXART IMAGING INC, Hsin...

1. An optical mechanism, comprising:
a substrate having a front side and a rear side opposite to the front side;
a wafer scale image sensor package attached to the front side of the substrate and having an active area;
a light source attached to the front side of the substrate; and
a securing member secured to the substrate from a front of the active area of the wafer scale image sensor package and comprising
a first portion engaging the rear side of the substrate,
a second portion extending from the first portion through a hollow in the substrate to the front side of the substrate,
a third portion connected to the second portion to form
a first containing space for accommodating the light source, and
a second containing space for accommodating the wafer scale image sensor package, and
a blocking region being a part of the securing member extending toward the front side of the substrate and separating the
first containing space from the second containing space.

US Pat. No. 9,256,364

TOUCH CONTROL APPARATUS WHICH IS HELPFUL FOR DOUBLE CLICK DETERMINING, AND COMPUTER READABLE RECORDING MEDIA FOR PERFORMING CORRESPONDING TOUCH CONTROL METHOD

PixArt Imaging Inc., Sci...

1. A non-transitory computer readable recording media, comprising at least one program code recorded thereon, a touch control
method is performed when the program code is read and executed, wherein the touch control method comprises the following steps:
(a) detecting location data for an object relative to a detecting surface to generate at least one displacement data;
(b) storing the displacement data to a storage apparatus and outputting the stored displacement data to a target apparatus
from the storage apparatus after storing the displacement data for a predetermined time period, when the object touches the
detecting surface; and

(c) cleaning the stored displacement data when the object leaves the detecting surface.

US Pat. No. 9,234,756

OBJECT TRACKING DEVICE CAPABLE OF REMOVING BACKGROUND NOISE AND OPERATING METHOD THEREOF

PIXART IMAGING INC, Hsin...

1. An object tracking device, comprising:
a light source configured to emit light at a lighting frequency;
an image sensor configured to output an operating image when the light source is being turned on and output a background image
when the light source is being turned off; and

a processing unit configured to
obtain background information from the background image, wherein the background information is a background object position
of at least one background object in the background image,

calculate a differential image of the operating image and the background image,
identify at least one object in the differential image, and
remove an invalid object, which has a distance from the background object position smaller than a distance threshold and has
a size smaller than a size threshold, from the differential image.

US Pat. No. 9,684,416

IMAGE SENSOR

PixArt Imaging Inc., Hsi...

1. An image sensor, comprising:
an image sensing unit array, for sensing an object and comprising a plurality of image sensing units arranged in a sensing
matrix with M rows and N columns;

an image data reading circuit, for reading and outputting image data caught by at least part of the image sensing units;
a control unit,
for controlling numbers and locations of the image sensing units for each row or each column, from which the image data reading
circuit reads the image data;

for computing relations between a read region and each of the rows or each of the columns, wherein the read region in the
image sensing unit array and corresponds to the object; and

for controlling the image data reading circuit to read at least part of the image data of the column or the row according
to the relations; and

a buffer comprising a plurality of buffer rows having a first buffer row and a second buffer row, each of the first buffer
row and the second buffer row comprising N buffer regions corresponding to the N columns of the image sensing unit array,

wherein image data from the image sensing units meeting a first condition in a k-th column of the image sensing unit array
is summed in the k-th buffer region of the first buffer row; and

wherein image data from image sensing units meeting as second condition in the k-th column of the image sensing unit array
is summed in the k-th buffer region of the second buffer row,

wherein a number of the buffer rows of the buffer is smaller than M.

US Pat. No. 9,606,636

OPTICAL PROCESSING APPARATUS, LIGHT SOURCE LUMINANCE ADJUSTMENT METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM THEREOF

PIXART IMAGING INC., Hsi...

1. An optical processing apparatus, comprising:
a light source unit, being configured to provide a beam of light;
a processing unit, being electrically connected to the light source unit and configured to define a frame rate, define a plurality
of first time instants within a first time interval, and set the beam of light provided by the light source unit to a luminance
value at each of the first time instants, wherein a length of the first time interval is shorter than a reciprocal of the
frame rate and the luminance values are different and within a first range; and

an image sensing unit, being electrically connected to the processing unit and configured to capture a first image by an exposure
time length at each of the first time instants, wherein the exposure time lengths are the same,

wherein the processing unit further calculates an image quality index of each of the first images, derives a comparison result
by comparing the image quality indices with at least one threshold, and selects more than one of the first images as a plurality
of first temporary images when the image quality indices do not meet the at least one threshold;

wherein the processing unit further derives an averaged image by averaging the first temporary images and sets the averaged
image as a first selected image representing the first time interval;

wherein the processing unit further decides a second range corresponding to a second time interval according to the comparison
result, the second time interval occurs later than the first time interval, a length of the second time interval is shorter
than the reciprocal of the frame rate, the second range is different from the first range, the processing unit further defines
a plurality of second time instants within the second time interval, the processing unit further sets the beam of light provided
by the light source unit to a luminance value at each of the second time instants, the luminance values corresponding to the
second time interval are different and within the second range, and the image sensing unit further captures a second image
by the exposure time length at each of the second time instants.

US Pat. No. 9,557,837

TOUCH INPUT APPARATUS AND OPERATION METHOD THEREOF

PIXART IMAGING INC., Hsi...

1. A touch input apparatus, comprising:
a first carbon nanotube layer of which carbon nanotubes each are disposed to be roughly parallel to a first direction;
a second carbon nanotube layer of which carbon nanotubes each are disposed to be roughly parallel to a second direction;
a plurality of first contact pads electrically connected to an edge of the first carbon nanotube layer and a plurality of
second contact pads electrically connected to an edge of the second carbon nanotube layer;

a processing unit sequentially receives first output signals from the plurality of first contact pads in a first period and
sequentially receive second output signals from the plurality of second contact pads in a second period, the first output
signals are voltage values of each one of the first contact pads and the second output signals are voltage values of each
one of the second contact pads;

wherein, the processing determines a position of an external force according to the first output signals and the second output
signals from the plurality of first contact pads and the plurality of second contact pads; and

wherein, the processing determines a strength of the external force according to slopes or shapes of signal distributions
of the first output signals from the plurality of first contact pads and the second output signals from the plurality of second
contact pads.

US Pat. No. 9,459,338

RELATIVE POSITION POSITIONING SYSTEM AND TRACKING SYSTEM

PIXART IMAGING INC., Hsi...

6. A relative position positioning system, comprising:
a first apparatus including:
a first light sensing device, configured to sense a movement of the first apparatus relative to a plane and therefore obtains
a plurality of images corresponding to the movement of the first apparatus;

a first wireless transmission unit; and
a first processing unit, electrically coupled to the first wireless transmission unit and the first light sensing device and
configured to processing the plurality of images obtained by the first light sensing device so as to measure a displacement
of the first apparatus relative to the plane;

a second apparatus including:
a second light sensing device, configured to sense a movement of the second apparatus relative to the plane and therefore
obtains a plurality of images corresponding to the movement of the second apparatus;

a second wireless transmission unit; and
a second processing unit, electrically coupled to the second wireless transmission unit and the second light sensing device
and configured to processing the plurality of images obtained by the second light sensing device so as to measure a displacement
of the second apparatus relative to the plane; and

a third apparatus including:
a third light sensing device, configured to sense a movement of the third apparatus relative to the plane and therefore obtains
a plurality of images corresponding to the movement of the third apparatus;

a third wireless transmission unit; and
a third processing unit, electrically coupled to the third wireless transmission unit and the third light sensing device and
configured to processing the plurality of images obtained by the third light sensing device so as to measure a displacement
of the third apparatus relative to the plane;

wherein each one of the first and second apparatuses transmits its own displacement to the third apparatus through the first
and second wireless transmission units and thereby the third apparatus transmits the received displacements and its own displacements
to the first and second apparatuses through the third wireless transmission unit so that each one of the first, second and
third apparatus accordingly generates a relative position from one another, each one of the first and second apparatuses is
configured to sense a relative position of the other in an initialization period, wherein in an operation period, each one
of the first and second apparatuses is configured to measure its own displacement relative to a plane, transmit its own measured
displacement to the other through a wireless transmission mean, and update the relative position of the other according to
its own displacement and the displacement received from the other.

US Pat. No. 9,456,171

TV DEMODULATOR CAPABLE OF CALIBRATING OUTPUT AND CALIBRATION METHOD THEREOF

PIXART IMAGING INCORPORAT...

7. A calibration method for a TV demodulator, comprising the steps of:
(A) providing a TV digital-to-analog converter (TV DAC), wherein the TV DAC distributes a master current via a current distribution
circuit, to determine an analog output signal;

(B) providing a first switch and a first resistor, which are coupled to each other in series, wherein the first switch is
coupled to the current distribution circuit and the output terminal;

(C) providing a second switch and a second resistor, which are coupled to each other in series, wherein the second switch
is coupled to the current distribution circuit; and

(D) feedback controlling the master current according to the analog output signal.

US Pat. No. 9,423,888

OBJECT NAVIGATING APPARATUS AND OBJECT NAVIGATING METHOD

PixArt Imaging Inc., Hsi...

1. An object navigating apparatus, comprising:
a sensing apparatus, for sensing an object; and
a control unit, for continuously computing a plurality of displacements that the object is relative to the sensing apparatus
during a first sensing time interval;

wherein the control unit increases the sensing resolution when at least N displacements of the plurality of displacements
are larger than a first predetermined value during the first sensing time interval;

where N is a positive integer greater than 2.

US Pat. No. 9,383,833

NAVIGATION DEVICE AND POWER SAVING METHOD THEREOF

PIXART IMAGING INC., Hsi...

1. A navigation device, configured to report a displacement with a burst mode in a normal operation mode, the navigation device
comprising:
a main clock circuit configured to generate a first clock signal with a first frequency;
an auxiliary clock circuit configured to generate a second clock signal with a second frequency, wherein the second frequency
is lower than the first frequency;

an image sensor configured to capture a first image, a second image and a third image according to the first clock signal
within a burst period of the burst mode; and

a processing unit configured to
calculate the displacement according to the first image, the second image and the third image, and
disable the main clock circuit to stop generating the first clock signal at a predetermined time after receiving the third
image from the image sensor,

wherein a start point of a next burst period is counted by using the second clock signal generated by the auxiliary clock
circuit.

US Pat. No. 9,342,161

OPTICAL POINTING DEVICE AND CORRESPONDING METHOD FOR CONCURRENTLY PERFORMING GAIN CONTROL AND IMAGE CAPTURING FOR NAVIGATION OF OPTICAL POINTING DEVICE DURING ONE LED TURNED-ON TIME PERIOD

PixArt Imaging Inc., Sci...

1. An optical pointing device, comprising:
a light emitting unit, for emitting light to a surface;
a pixel array, for sensing the light reflected from a surface to generate at least one sense resultant signal;
a gain controlling circuit, coupled to the pixel array, for controlling a gain value for the at least one sense resultant
signal; and

a processing circuit, coupled to the gain controlling circuit, for performing image capturing for a navigation of the optical
pointing device based on the gain value;

wherein the gain controlling circuit and the processing circuit concurrently control the gain value and perform the image
capturing for the navigation of the optical pointing device.

US Pat. No. 9,285,926

INPUT DEVICE WITH OPTICAL MODULE FOR DETERMINING A RELATIVE POSITION OF AN OBJECT THEREON

PIXART IMAGING INC., Hsi...

1. An input device, comprising:
an optical module, comprising:
a light guide plate, being made of a transparent material, having a top surface, a bottom surface opposite the top surface,
and a side, wherein the transparent material makes the light travel in a way of total reflection between the top surface and
the bottom surface within the light guide plate;

a light source, being disposed adjacent to the side of the light guide plate to emit a light to the side, the light traveling
within the light guide plate;

a scattering layer, being formed on the bottom surface and being configured to change a reflection path of the partial light
hitting on the bottom surface so that the partial light is projected out of the top surface by the scattering layer to form
a penetrating light; and

a sensor, having a viewing angle covering at least a part of the bottom surface of the light guide plate, wherein when an
object approaches or touches the top surface of the light guide plate, at least a part of the penetrating light is reflected
by the object to form a reflected light passing through the light guide plate and then being received by the sensor, and the
input device generates a position signal according to the reflected light, the position signal indicating at least one relative
position of the object with respect to the top surface of the light guide plate;

wherein the sensor further continuously receives the reflected light so that the input device determines a variance of the
at least one relative position over time according to the position signal;

wherein the input device is a mouse, the optical module is used as a mouse wheel, and the variance is used by the input device
to generate a control signal which represents one of a 360° scroll action, a click action and a combination thereof.

US Pat. No. 9,274,051

MOVEMENT DETECTION DEVICE CAPABLE OF DETECTING THREE-DIMENSIONAL MOTIONS

PIXART IMAGING INC., Hsi...

1. A movement detection device configured to detect a movement of an object in a space range, the movement detection device
comprising:
a light source configured to emit light along an optical axis;
a light guiding element;
at least two light sensing elements laid out on a surface of a same substrate and having an offset therebetween along a first
direction such that the object, when moving in the space range, reflects the light from the light source sequentially to the
light sensing elements through the light guiding element; and

a processing unit configured to
identify the movement of the object along the first direction according to a sequence in which the light sensing elements
detect light reflected by the object,

identify a motion of the object along the optical axis according to an intensity variation of the light reflected by the object
and detected by the light sensing elements, and

identify a single click when the intensity variation detected within a predetermined time interval changes from dark to bright
once and from bright to dark once.

US Pat. No. 9,123,131

PARALLEL CORRELATION METHOD AND CORRELATION APPARATUS USING THE SAME

PIXART IMAGING INC., Hsi...

1. A parallel correlation method, adapted for an optical navigation device, the method comprising:
a) generating a reference array corresponding to a reference image and a compare array corresponding to a first compare image
captured;

b) storing the reference array in a first memory bank in a manner that the reference pixel values of an ith column of the
reference array are indexed by the ith column; storing the compare array in a second memory bank in a manner that the compare
pixel values of a jth column of the compare array are indexed by the jth column; and

c) fetching the compare pixel values from the second memory bank and the corresponding reference pixel values from the first
memory bank with column indexing to simultaneously compute the correlation between the reference array and the compare array
for a L×M correlation array, wherein each correlation value in the L×M correlation array corresponds to an indexing movement
of the reference array over the compare array;

wherein L, M, i, and j are integers.

US Pat. No. 9,116,578

OPTICAL DISTANCE DETERMINATION DEVICE, OPTICAL TOUCH MONITORING SYSTEM AND METHOD FOR MEASURING DISTANCE OF A TOUCH POINT ON AN OPTICAL TOUCH PANEL

PixArt Imaging Inc., Sci...

1. An optical touch display system comprising:
a touch panel contactable by a plurality of objects;
a first image sensor for capturing a first image comprising image information of the plurality of objects on the touch panel;
a second image sensor for capturing a second image comprising image information of the plurality of objects on the touch panel;
an auxiliary image sensor for capturing an auxiliary image comprising image information of at least one target object of the
plurality of objects on the touch panel, and a physical distance between the first image sensor and the auxiliary image sensor;

a coordinates calculation module for calculating a plurality of candidate coordinates of the plurality of objects comprising
the target object according to image formation positions of the plurality of objects in the first image and the second image;
and

a true image determination module for calculating a pixel distance between the image formation positions of the target object
in the first image and the auxiliary image, and selecting a set of candidate coordinates of the plurality of candidate coordinates
as coordinates of the target object according to the pixel distance, the physical distance, and focal lengths of the first
image sensor and the second image sensor;

wherein the first image sensor and the auxiliary image sensor have the same focal length, ratio of the focal length and the
pixel distance is approximately equal to ratio of the physical distance and distance between the plurality of objects and
the first image sensor, and the true image determination module selects the set of candidate coordinates from the plurality
of candidate coordinates as the coordinates of the plurality of objects through the physical distance according to the ratio
of the focal length and the pixel distance.

US Pat. No. 10,116,295

VOLTAGE COMPARING CIRCUIT AND VOLTAGE COMPARING METHOD

PixArt Imaging Inc., Hsi...

1. A voltage comparing circuit, comprising:a comparator, comprising a first comparing terminal and a second comparing terminal;
a time interval computing unit;
a switch module, coupled to the first comparing terminal and the second comparing terminal, comprising a reference voltage terminal coupled to a reference voltage source, and comprising a first input terminal and a second input terminal;
a first current source, comprising a first charging terminal coupled to the first input terminal and the second input terminal;
a first capacitor, coupled to the first current source at the first charging terminal; and
a capacitance adjusting unit, coupled to the first capacitor.

US Pat. No. 9,851,836

TOUCH DISPLAY DEVICE AND OPERATING METHOD THEREOF

PIXART IMAGING INC., Hsi...

1. A touch device comprising:
a substrate; and
a touch control device attached to the substrate and comprising:
a touch zone comprising a matrix of first detecting cells coupled at a first grid distance along a direction parallel to a
surface of the substrate;

a fingerprint detection zone comprising a matrix of second detecting cells coupled at a second grid distance and a third grid
distance along the direction parallel to the surface of the substrate, wherein the third grid distance is larger than the
second grid distance; and

a control circuit configured to initially control detection operations of the touch zone and the fingerprint detection zone
by coupling the matrix of the first detecting cells with the first grid distance and the matrix of second detecting cells
with the third grid distance, and then configured to control the detection operation of the fingerprint detection zone by
coupling the matrix of second detecting cells with the second grid distance when a touch position is firstly detected in the
fingerprint detection zone.

US Pat. No. 9,818,245

INDIVIDUALIZED CONTROL SYSTEM UTILIZING BIOMETRIC CHARACTERISTIC

PixArt Imaging Inc., Hsi...

1. An individualized control system for controlling a smart parking lot which comprises a plurality of illumination lights
arranged corresponding to a plurality of parking spaces and passways, the individualized control system comprising:
a detection device configured to detect a second derivative of photoplethysmogram (SDPPG) to identify a user ID according
to the SDPPG, and output an ID signal according to the identified user ID, wherein the detection device comprises a biometric
detection module comprising:

a substrate;
a light source module electrically coupled to the substrate and configured to emit infrared light to illuminate a skin surface;
a detection region electrically coupled to the substrate through a plurality of contact points and configured to detect penetrating
light emitted from the light source module for illuminating the skin surface and passing through body tissues to correspondingly
generate an infrared light signal; and

a control module electrically coupled to the light source module via the substrate to control the light source module, electrically
coupled to the contact points via the substrate to receive the infrared light signal from the detection region, and configured
to calculate the SDPPG according to the infrared light signal;

a database configured to previously store information of a specific parking space and a passway to the specific parking space
respectively associated with each of a plurality of user IDs; and

a control host configured to
receive the ID signal corresponding to the identified user ID from the detection device,
control the illumination lights in areas of the specific parking space and the passway associated with the user ID according
to the received ID signal to turn on, and

control the rest illumination lights among the plurality of illumination lights to turn off.

US Pat. No. 9,619,072

TOUCH SYSTEM WITH TRACK DETECTING FUNCTION AND METHOD THEREOF

PixArt Imaging Inc., Hsi...

1. A method for controlling a touch system, comprising:
sensing a track of an indication object on a touch pad;
continuously obtaining motion vectors according to the track of the indication object;
generating a candidate motion vector by summing a plurality of unweighted motion vectors, and nonlinearly generating a target
motion vector according to the candidate motion vector;

moving a target shown on a display panel according to the target motion vector, wherein a displayed track over which the target
is moved on the display panel represents a smoother version of the track of the indication object on the touch pad; and

when the candidate motion vector is smaller than a predetermined value, determining the indication object being on any area
of the touch pad stopped moving, and continuing to move the target along a direction of the candidate motion vector;

wherein each of the motion vectors represents a moving distance and a moving direction from a position of the indication object
to a next position of the indication object, and the indication object is on the touch pad of the touch system.

US Pat. No. 9,536,914

FRONT SIDE ILLUMINATED SEMICONDUCTOR STRUCTURE WITH IMPROVED LIGHT ABSORPTION EFFICIENCY

PIXART IMAGING INC., Hsi...

1. A front side illuminated semiconductor structure comprising:
a transparent layer having an upper surface and a lower surface, wherein the upper surface is configured to receive incident
light which penetrates the transparent layer and leaves from the lower surface to form emergent light;

a chip structure comprising a light sensing region and a base layer, wherein a part of the emergent light sequentially penetrates
the light sensing region and the base layer; and

a reflecting layer formed on a bottom surface of the base layer and directly in contact with the base layer, and configured
to reflect the part of the emergent light back to the light sensing region to be absorbed by the light sensing region again.

US Pat. No. 9,529,139

LIGHT SOURCE MODULE

Pixart Imaging Inc., Hsi...

1. A light source module comprising:
an LED die;
a lead frame electrically coupled to the LED die;
at least one light guide member encapsulating the LED die and a part of the lead frame, and comprising at least one tilted
surface opposite to the LED die, wherein a part of an ejection surface of the light guide member is coated with a reflection
film;

a light pipe combined to a lateral surface of the light guide member; and
a pipe holder configured to secure the light pipe and comprising at least one receiving hole configured to accommodate an
end of the at least one light guide member close to the LED die.

US Pat. No. 9,489,085

OPTICAL TOUCH PANEL SYSTEM AND POSITIONING METHOD THEREOF

PIXART IMAGING INCORPORAT...

1. An optical touch panel system for positioning an object existing in a touch control area including a first side, a second
side adjacent to a first end of the first side, a third side opposite the first side, and a fourth side adjacent to a first
end of the first side, the optical touch panel system comprising:
at least one reflective element disposed on the first side of the touch control area;
at least two light guide modules respectively disposed on the second and third sides of the touch control area adjacent to
and opposite the reflective element, the light guide modules emitting light;

an image sensor for capturing an image of the object;
a plurality of first photo-detectors arranged on the fourth side of the touch control area adjacent to the image sensor, the
first photo-detectors sensing the object to obtain first shade information;

a plurality of second photo detectors for sensing the object to obtain second shade information, wherein the second photo
detectors are

(1) disposed non-symmetrically along the first side of the touch control area on which the reflective element is, and the
second photo detectors are adjacent to the first photo detectors and farther from the second side; or

(2) disposed non-symmetrically along the third side of the touch control area opposite the reflective element, and the second
photo detectors are adjacent to the image sensor and farther from the second side; and

a processor for calculating the coordinates of the object according to the image of the object and the first and second shade
information,

wherein:
in a first period, the two light guide modules simultaneously emit light, and the image sensor captures the image in this
first period;

in a second period, the light guide module on the second side emits light and the light guide module on the third side is
turned off, whereby when the first photo-detectors sense the object in this second period, the first photo-detectors receive
light from a front side of the first photo-detectors but not a lateral side of first photo-detectors; and

in a third period, the light guide module on the third side emits light and the light guide module on the second side is turned
off, whereby when the second photo detectors sense the object in this third period, the second photo detectors only receive
the light from their front side but not their lateral side.

US Pat. No. 9,435,646

DISPLACEMENT DETECTION DEVICE AND OPERATING METHOD THEREOF

Pixart Imaging Inc, Hsin...

1. A displacement detection device, comprising:
a housing;
an image sensor disposed inside the housing and configured to capture image frames at a sampling frequency;
a light source disposed inside the housing and configured to provide, in at least one speed mode, light for the image sensor
in capturing the image frames;

a light control unit coupled to the light source and configured to control the light source with the speed mode to turn on
corresponding to N successive image frames and next turn off corresponding to M successive image frames where in N and M are
integers;

a processing unit configured to calculate a displacement according to the image frames captured when the light source turns
on to be served as an estimated displacement for an interval during which the light source turns off; and

a transmission interface configured to output the displacement and the estimated displacement at a report rate, wherein (M+N)
is smaller than or equal to a quotient calculated by dividing a frame rate of the light source by the report rate.

US Pat. No. 9,348,071

MINIATURIZED OPTICAL SYSTEM, LIGHT SOURCE MODULE AND PORTABLE ELECTRONIC DEVICE

PIXART IMAGING INC., Hsi...

1. A miniaturized optical system, comprising:
a protection cover having a first surface and a second surface;
a light source opposite to the first surface of the protection cover;
an image sensor opposite to the first surface of the protection cover; and
at least one of a first interference film and a second interference film,
the first interference film disposed between the light source and the protection cover to allow the light source to form a
predetermined light shape in front of the second surface of the protection cover through the first interference film, wherein
the first interference film comprises

a first substrate which has a first side facing the protection cover and a second side facing the light source, and
a first coating layer formed on the first side of the first substrate but not formed on the second side of the first substrate,
and

the second interference film disposed between the image sensor and the protection cover to allow the image sensor to receive
light of a predetermined range in front of the second surface of the protection cover through the second interference film,
wherein the second interference film comprises

a second substrate which has a first side facing the protection cover and a second side facing the image sensor, and
a second coating layer formed on the second side of the second substrate but not formed on the first side of the second substrate,
wherein a transmittance wavelength range of the first and second interference films has a predetermined shift rate in wavelengths
with respect to incident angles of light impinging on the first and second interference films.

US Pat. No. 10,120,459

IMAGE PROCESSING METHOD CAPABLE OF DETECTING NOISE AND RELATED NAVIGATION DEVICE

PixArt Imaging Inc., Hsi...

1. An image processing method capable of detecting noise, comprising:adjusting a lighting unit to acquire an over-exposure image;
comparing each pixel of the over-exposure image with at least one threshold value;
labeling a pixel of the over-exposure image as the noise while bright intensity of the foresaid pixel is lower than the threshold value;
calculating a simulating value according to bright intensity of pixels around the noise and except the noise; and
utilizing the simulating value and bright intensity of other pixels except the noise to execute a displacement detecting calculation.

US Pat. No. 10,033,937

OPTICAL DISTANCE MEASUREMENT SYSTEM WITH DYNAMIC EXPOSURE TIME

PIXART IMAGING INC., Hsi...

1. An optical distance measurement system comprising:a light source configured to emit light at an operating frequency;
an image sensor configured to
capture, with a first exposure time, a first bright image corresponding to activation of the light source,
capture, with the first exposure time, a first dark image corresponding to deactivation of the light source,
capture, with a second exposure time, a second bright image corresponding to activation of the light source, and
capture, with the second exposure time, a second dark image corresponding to deactivation of the light source, wherein the second exposure time is longer than the first exposure time; and
a processing unit configured to
receive the first bright image, the first dark image, the second bright image and the second dark image,
adjust the first exposure time according to a first average brightness value of the first dark image, and
adjust the second exposure time according to a second average brightness value of the second dark image.

US Pat. No. 9,877,291

WIRELESS TRANSCEIVER APPARATUS AND METHOD CAPABLE OF CONTROLLING GAIN(S) OF AMPLIFIER(S) BY DETECTING POWER OF INTERFERENCE SIGNAL IN THE AIR WITH CONSIDERATIONS OF POWER SAVING AND SMALLER CIRCUIT AREA

PixArt Imaging Inc., Hsi...

1. A wireless transceiver apparatus, comprising:
a power detector, configured at a wireless signal transmission side and used for detecting power of a power amplifier on a
transmitting path of the wireless signal transmission side;

an analog signal receiving circuit, configured at a wireless signal reception side and coupled to the power detector, the
analog signal receiving circuit receiving a wireless signal form an antenna; and

a processing circuit, coupled to the analog signal receiving circuit;
wherein, under a signal reception mode, the analog signal receiving circuit transmits the received wireless signal to the
processing circuit; under an interference detection mode, the analog signal receiving circuit transfers the received wireless
signal to the power detector, and the power detector detects a power of the received wireless signal to measure an interference
power value and transmit the interference power value to the processing circuit.