US Pat. No. 10,474,230

BRIGHTNESS CONTROL FOR AN AUGMENTED REALITY EYE-MOUNTED DISPLAY

Tectus Corporation, Sara...

19. A system for controlling a brightness of an augmented reality eye-mounted display, the system comprising:an eye-mounted display comprising a contact lens containing a femtoprojector, the femtoprojector projecting an augmented reality image to a user's retina, the augmented reality image overlaid on an external scene viewed by the user through the contact lens;
a photodetector that detects a brightness level of a local sensing area within the external scene rather than an ambient brightness level of the entire external scene; and
a controller that adjusts a brightness level of the augmented reality image based on the brightness level of the external scene and wherein the controller can orient the photodetector to different local sensing areas within the external scene.

US Pat. No. 10,388,641

ULTRA-DENSE LED PROJECTOR

Tectus Corporation, Sara...

1. A monolithic device comprising:a light emitting diode (LED) array comprising:
an array of pillars of semiconductor layers; the semiconductor layers including an N-type layer, an active layer, and a P-type layer; the pillars having a height greater than their width;
a fill that vertically surrounds the pillars and fills a space between the pillars, the fill including a reflective metal; the reflective metal providing mechanical support for the pillars, providing optical isolation between the pillars, and electrically contacting the N-type layer of each pillar along sidewalls of the N-type layers; and
a dielectric material insulating sidewalls of the P-type layer and the active layer from the reflective metal.

US Pat. No. 10,467,992

EYE MOUNTED INTRAOCULAR DISPLAYS AND SYSTEMS

Tectus Corporation, Sara...

1. An eye mounted display system comprising:an intraocular display capsule configured to be placed inside a user's eye; and
a femto projector contained in the intraocular display capsule, the femto projector projecting a plurality of pixels onto a retina of the user's eye, thereby forming a visual sensation of an image comprising the pixels, the femto projector comprising:
an array of addressable display pixels, and
display optics projecting light from the display pixels to a portion of the retina corresponding to the image displayed by the femto projector, where the portion of the retina is fixed as the user's eye rotates in its socket and thereby forming the visual sensation of the image comprising the pixels.

US Pat. No. 10,409,068

BINOCULAR FEMTOPROJECTOR LAYOUTS

Tectus Corporation, Sara...

1. A pair of eye-mounted displays, each eye-mounted display comprising:a contact lens that comprises a femtoprojector system to project an image onto a retina of a user's eye when the contact lens is mounted on the user's eye; and
when the pair of eye-mounted displays is mounted on the user's left eye and on the user's right eye, a left-eye image projected onto the user's left-eye retina and a right-eye image projected onto the user's right-eye retina are only partially overlapping within the user's binocular visual field such that overlapping portions of the left-eye image and the right-eye image are projected onto a same portion of the left-eye retina and the right-eye retina independent of each eye's location within a socket.

US Pat. No. 10,417,950

SUBPIXEL LAYOUTS FOR EYE-MOUNTED DISPLAYS

Tectus Corporation, Sara...

10. An eye-mounted display comprising:a contact lens; and
a femtoprojector including a backplane and a frontplane that fit in the contact lens; the frontplane containing an array of red, green and blue light emitters organized into arrays of individually addressable red, green and blue subpixels; the backplane receiving data that specifies images to be projected by the frontplane, the backplane converting the received data to drive signals that drive the subpixels; where a ratio of (red subpixels):(blue subpixels) is at least 3:1 and/or a ratio of (green subpixels):(blue subpixels) is at least 3:1, and each blue subpixel comprises at least two blue light emitters; wherein the blue light emitters are individually addressable and the data received by the backplane determines the organization of blue light emitters into blue subpixels.

US Pat. No. 10,409,092

CONTACT LENS DATA TRANSCEIVER

Tectus Corporation, Sara...

1. A contact lens comprising:an ultra-high-frequency (UHF) radio antenna contained within the contact lens;
a UHF radio transceiver contained within the contact lens and coupled to the UHF radio antenna via a transmit/receive switch, the UHF radio transceiver designed to operate at a bit rate of one megabit per second or more; and
wherein the UHF radio transceiver comprises:
a UHF carrier phase tracking loop and a UHF frequency acquisition loop that share a voltage-controlled oscillator, the frequency acquisition loop designed to be turned off periodically during normal transceiver operation.

US Pat. No. 10,353,204

FEMTOPROJECTOR OPTICAL SYSTEMS

Tectus Corporation, Sara...

1. A femtoprojector optical system for projecting an image produced by an image source to a retina of a user's eye, the femtoprojector optical system comprising:a convex secondary mirror facing the image source, where image-forming rays from the image source are incident on and reflected by the secondary mirror;
a concave primary mirror facing the secondary mirror and further reflecting the image-forming rays from the secondary mirror, the secondary mirror and primary mirror cooperating to project the image from the image source;
a light baffle system that includes an obscuration, the obscuration blocking stray rays from the image source that are not reflected by the secondary mirror; and
a solid transparent substrate with the primary mirror on one end of the substrate and with the secondary mirror on an opposite end of the substrate;
where the femtoprojector optical system is small enough to mount in a contact lens wearable by a human user.

US Pat. No. 10,505,394

POWER GENERATION NECKLACES THAT MITIGATE ENERGY ABSORPTION IN THE HUMAN BODY

Tectus Corporation, Sara...

1. A system comprising:a necklace comprising:
a driver circuit comprising a first signal generator to generate a first alternating current (AC) electrical signal and a second signal generator to generate a second AC electrical signal having a same frequency as the first AC electrical signal; and
a plurality of conductive loops extending along a band of the necklace and including a first conductive loop and a second conductive loop concentric with the first conductive loop, the first conductive loop being driven by the first AC signal and the second conductive loop being driven by the second AC signal to provide wireless power to a remote device via inductive coupling.

US Pat. No. 10,488,678

FOLDED OPTICAL DESIGN FOR EYE-MOUNTED CAMERAS

Tectus Corporation, Sara...

1. An eye-mounted device comprising:a contact lens; and
a femtocamera mounted in the contact lens, the femtocamera comprising:
a front aperture facing away from a user's eye and towards an external environment;
an image sensor; and
optics that image the external environment onto the image sensor, where an optical path from the front aperture to the image sensor is a folded optical path.

US Pat. No. 10,459,255

COMPENSATING VISUAL IMPAIRMENT BY USING AN EYE-MOUNTED DISPLAY

Tectus Corporation, Sara...

1. A method for enhancing vision of a user with visual impairment, the method comprising:capturing images of a user's unimpaired view of a surrounding environment;
modifying the captured images to create compensated images, the modification compensating for the user's visual impairment; and
projecting, by an eye-mounted display, the compensated images onto the user's retina;
where the visual impairment is that a portion of the user's unimpaired view would be imaged by the user's eye to a damaged section of the user's retina, and the eye-mounted display projects the compensated images away from the damaged section of the user's retina.

US Pat. No. 10,353,205

FEMTOPROJECTOR OPTICAL SYSTEMS

Tectus Corporation, Sara...

1. A femtoprojector optical system for projecting an image produced by an image source to a retina of a user's eye, the femtoprojector optical system comprising:a convex secondary mirror facing the image source, where image-forming rays from the image source are incident on and reflected by the secondary mirror;
a concave primary mirror facing the secondary mirror and further reflecting the image-forming rays from the secondary mirror, the secondary mirror and primary mirror cooperating to project the image from the image source onto the user's retina; and
a light baffle system that includes an obscuration, the obscuration blocking stray rays from the image source that are not reflected by the secondary mirror, where a ratio of (a) power in the stray rays that exit the femtoprojector optical system but do not form the projected image on the user's retina; to (b) power in the image-forming rays that exit the femtoprojector optical system and do form the projected image on the user's retina, does not exceed 1:2;
where the femtoprojector optical system is small enough to mount in a contact lens wearable by a human user;
where the femtoprojector optical system has a height h as measured from the image source to the secondary mirror of less than 2 mm and an aspect ratio of (height h):(width w) of not more than 2:1 where the width w is a width of the primary mirror.

US Pat. No. 10,481,403

CONTACT LENS WITH RETINAL CAMERA

Tectus Corporation, Sara...

1. A system comprising:an eye-mounted device comprising:
a scleral contact lens that sits on a sclera of a wearer's eye; and
a retinal camera contained in the scleral contact lens, the retinal camera imaging light reflected from a retina of a wearer of the scleral contact lens, the reflected light imaged by the retinal camera comprising a reflection of an external scene imaged by the eye onto the retina; and
a processing system that determines a gaze direction of the eye relative to the external scene based on the reflected light imaged by the retinal camera.

US Pat. No. 10,602,513

WIRELESS COMMUNICATION BETWEEN A CONTACT LENS AND AN ACCESSORY DEVICE

Tectus Corporation, Sara...

1. An accessory device for managing wireless communication with a contact lens, the accessory device comprising:a controller;
a battery coupled to the controller;
a memory coupled to the controller;
an interference determination unit coupled to the controller, the interference determination unit scans a communication environment to determine interference characteristics across a plurality of wireless channels; and
a scheduler coupled to the controller, the scheduler communicates with a Wi-Fi access point and is provided a time window within a wireless channel, the scheduler schedules a communication with the contact lens in the provided time window within the wireless channel, wherein the communication comprises:
scanning a communication environment to determine interference characteristics of a plurality of wireless channels;
communicating with a Wi-Fi access point to coordinate sharing a wireless channel within a Wi-Fi network;
communicating data with a contact lens through a shared wireless channel; and
responsive to failing to share a wireless channel, sending a data packet to the contact lens through a wireless channel that has a least interference, wherein sending the data packet comprises:
waking up from a sleep mode;
choosing a wireless channel that is not being used by a Wi-Fi access point;
sending the data packet to the contact lens through the chosen wireless channel; and
determining whether an acknowledgement signal from the contact lens is received.

US Pat. No. 10,529,107

PROJECTOR ALIGNMENT IN A CONTACT LENS

Tectus Corporation, Sara...

1. A contact lens comprising:a contact lens body;
a first femtoprojector embedded within the contact lens body and configured to project a first image onto a retina of a wearer of the contact lens;
a second femtoprojector embedded within the contact lens body and configured to project a second image onto the retina of the wearer of the contact lens; and
an alignment circuit configured to align the first femtoprojector and the second femtoprojector based on an input from the wearer of the contact lens.

US Pat. No. 10,580,334

PERIPHERAL FEMTOPROJECTOR OPTICAL SYSTEMS

Tectus Corporation, Sara...

1. An eye-mounted display comprising:a contact lens containing a plurality of femtoprojectors that project an image to a user's retina;
the plurality of femtoprojectors including a first group of one or more central femtoprojectors that projects a first portion of the image with a first resolution to a first region of the retina, where each central femtoprojector comprises reflective optics;
the plurality of femtoprojectors further including a second group of one or more peripheral femtoprojectors that projects a second portion of the image with a second resolution to a more peripheral region of the retina, where the second resolution is lower than the first resolution;
each of the peripheral femtoprojectors comprising:
an image source;
an optically transparent core bounded by a first end and a second end opposite the first end;
a sidewall structure that extends between the two ends; and
a lens element positioned at the second end.

US Pat. No. 10,580,349

BACKPLANE FOR EYE-MOUNTED DISPLAY

Tectus Corporation, Sara...

1. A backplane that fits in an eye-mounted display, the backplane receiving data packets that specify images to be projected by a frontplane containing an array of light emitters that also fits in the eye-mounted display, the backplane converting the data packets to drive signals that drive corresponding subsets of the light emitters in the frontplane, where:the data packets specify subframes to be projected by the corresponding subsets of light emitters using a protocol that does not require receiving full frames for the entire array of light emitters; and
the drive signals cause the corresponding subsets of light emitters to produce light.