US Pat. No. 9,267,667

KIND OF OPTICAL LENS AND A KIND OF MINER'S HELMET LAMP

Huizhou Light Engine Limi...

1. An optical lens comprising:
a reflective surface including, in a circle with the central position of the reflective surface as its center: a convex surface
portion, a light distribution camber, a transition camber, and a reflective camber consecutively formed along the radius direction
of the reflective surface; and

a light exiting surface including, in a circle with the central position of the light exiting surface as its center: a Fresnel
annular surface and a surface formed along the radius direction of the light exiting surface, wherein:

the light distribution camber is configured to refract light incident on the reflective surface to the Fresnel annular surface
and the surface;

the reflective camber is configured to reflect the light incident on the reflective camber to the surface in collimation;
the Fresnel annular surface is configured to refract the light incident on the Fresnel annular surface through the light distribution
camber from the light exiting surface in collimation; and

the surface is configured to:
substantially wholly reflect the incident light through the light distribution camber to the reflective camber, and
refract the incident light through the reflective camber from the light exiting surface in collimation,
wherein the distribution of the light incident on the light distribution camber by the light distribution camber meets the
following tangent conditions:


wherein ?1 is the angle between the light incident on the light distribution camber and the central optical axis of the optical
lens; ?2 is the angle between the light incident on the light distribution camber refracted from the light distribution camber
and the central optical axis of the optical lens; ? is the angle between the periphery of the surface to the central position
of the reflective surface of the optical lens and the central optical axis of the optical lens.

US Pat. No. 9,445,472

METHOD AND CIRCUIT FOR DRIVING LIGHT-EMITTING DIODES FROM THREE-PHASE POWER SOURCE

Huizhou Light Engine Limi...

1. Light emitting diode (LED) drive circuitry, comprising:
a rectifier comprising three inputs adapted for connection to a three-phase power source to respectively receive three-phase
currents from said three-phase power source;

said rectifier comprising a plurality of diodes connected to rectify said three-phase currents to produce a DC voltage across
two outputs of said rectifier;

a plurality of LEDs connected in series across said two outputs of said rectifier, and driven by said DC voltage produced
by said rectifier at said two outputs, the plurality of LEDs including a first set, comprising multiple LEDs connected in
series, and a second set, comprising at least one LED, said first set and said second set being connected in series to a first
of said two outputs of said rectifier;

a first constant current source connected to a second of said two outputs of said rectifier and across said first set, said
first constant current source including a first transistor having a control electrode;

a second constant current source connected to said second of said two outputs of said rectifier and across said second set,
said second constant current source including a second transistor having a control electrode; and

a further transistor connected in series to said first transistor between said two outputs of said rectifier such that a same
current flows through said first transistor and said further transistor and between said two outputs of said rectifier, and
connected to said second transistor, said further transistor being configured to turn off said first transistor while said
second transistor is conducting.

US Pat. No. 9,161,400

METHOD AND APPARATUS FOR CANCELLING OUTPUT CURRENT RIPPLES IN LED DRIVING CIRCUITS

Huizhou Light Engine Limi...

1. A lighting array comprising:
a single stage power factor correction driver for converting an AC supply voltage to DC and providing a power correction factor,
with an output of the single stage power factor correction driver having an output voltage ripple;

a light emitting diode array;
a linear current regulator connected in series between the single stage power factor correction driver and the light emitting
diode array to actively adjust an equivalent impedance of the linear current regulator in correspondence with the output voltage
ripple of the single stage power factor correction driver; and

a valley voltage detector coupled between the linear current regulator and the single stage power factor correction driver,
the valley voltage detector being configured to:

determine a valley value of the voltage drop across the linear current regulator based on an output of the linear current
regulator and an output of the light emitting diode array; and

provide the valley value to the single stage power factor correction driver to modulate a DC output voltage value of the single
stage power factor correction driver.

US Pat. No. 9,206,975

NON-GLARE REFLECTIVE LED LIGHTING APPARATUS WITH HEAT SINK MOUNTING

Huizhou Light Engine Limi...

1. A lighting apparatus comprising:
a concave reflector having a front side with a reflective surface, a rear side, a focal point and a principal axis;
an axial heat pipe extending longitudinally near the principal axis of the reflector, the heat pipe having a proximal end
extending from the front side of the reflector and a distal end extending from the rear side of the reflector;

at least one LED thermally coupled to the axial heat pipe at or adjacent to the focal point of the reflector; and
a means for dissipation of heat coupled to the distal end of the axial heat pipe, the means for dissipation of heat including:
a radial heat pipe thermally coupled to the axial heat pipe and extending radially outward from the axial heat pipe;
a first heat dissipating planar fin thermally coupled to the radial heat pipe and radially extending from the radial heat
pipe along a radial direction of the radial heat pipe, the first heat dissipating planar fin including:

a planar surface substantially parallel to an axial direction of the axial heat pipe and the radial direction of the radial
heat pipe, and

first and second angled extensions extending from opposite ends of the planar surface, the first and second angled extensions
forming respective angles with the planar surface; and

a second heat dissipating planar fin thermally coupled to the radial heat pipe and spaced apart from the first heat dissipating
planar fin along the radial heat pipe, the second heat dissipating planar fin radially extending from the radial heat pipe
along the radial direction of the radial heat pipe, wherein:

the second heat dissipating planar fin is spaced farther from the axial heat pipe than the first heat dissipating planar fin,
and

the second heat dissipating planar fin has a planar surface substantially parallel to the planar surface of the first heat
dissipating planar fin, the planar surface of the first heat dissipating planar fin being larger than the planar surface of
the second heat dissipating planar fin.

US Pat. No. 9,161,404

AC LED ARRAY CONFIGURATION SWITCHING CIRCUIT TRIGGERED BY SOURCE VOLTAGE LEVEL

Huizhou Light Engine Limi...

1. An LED array lighting apparatus powered by a rectified voltage comprising:
a pair of LEDs, each having a forward bias voltage;
first and second current drivers;
three solid state switches configured such that in a first state the pair of LEDs are connected in parallel to the rectified
voltage and are driven by the first current driver, and in a second state the pair of LEDs are connected in series to the
rectified voltage and are driven by second current driver; and

a voltage detector comprising a zener diode having a zener voltage equal to or greater than a sum of the forward bias voltages
of the pair of LEDs, the voltage detector being configured to:

compare the rectified voltage to the zener voltage,
generate, using the zener diode, a control signal based on the comparison, and
control, based on the control signal, the three solid state switches to enter the first state when the control signal indicates
that the rectified voltage is below the zener voltage and to enter the second state when the control signal indicates that
the rectified voltage is greater than the zenor voltage.

US Pat. No. 9,462,648

METHOD AND ARRANGEMENT FOR REMOTELY DRIVING LIGHT EMITTING DIODES FROM A THREE-PHASE POWER SOURCE VIA A SINGLE PHASE CABLE SYSTEM

Huizhou Light Engine Limi...

1. Light emitting diode (LED) drive circuitry, comprising:
a rectifier comprising three inputs adapted for connection to a three-phase power source to respectively receive three-phase
currents from said three-phase power source;

said rectifier comprising a plurality of diodes connected to rectify said three-phase currents to produce a DC voltage across
two outputs of said rectifier;

a single phase power transmission system including two wires, respectively connected to said two outputs of said rectifier;
a plurality of LEDs connected in series across said two wires at at least one location situated remote from said rectifier,
and driven by said DC voltage produced by said rectifier at said two outputs, and being physically separated from said rectifier
by said transmission system at said at least one location remote from said rectifier; and

first and second current sources connected to the plurality of LEDs and across said two wires, the first current source being
configured to drive a first LED of the plurality of LEDs based on said DC voltage, and the second current source being configured
to drive the first LED and a second LED of the plurality of LEDs based on said DC voltage, wherein the first current source
comprises: a field-effect transistor (FET), a resistor, and a bi-polar junction transistor (BJT), wherein the drain of the
FET is connected to a first of the two outputs of said rectifier, the source of the FET is connected to the emitter of the
BJT via the resistor, and the collector of the BJT is connected to a second of the two outputs of said rectifier.

US Pat. No. 10,251,236

LAMPS HAVING CURRENT LEAKAGE PROTECTION, SYSTEMS AND METHODS OF USE

Huizhou Light Engine Limi...

1. An LED lamp configured to be connected to a leakage protection switch, the LED lamp comprising:one or more light emitting diodes;
a control circuit configured to be coupled to the leakage protection switch by a hot connector and a neutral connector;
a light board, wherein the light board is a printed circuit board that includes a track that surrounds at least a portion of a light module on the printed circuit board, a branch of the hot connector is directly coupled to the track and the light module is coupled to the control circuit by a hot line and a neutral line; and
an enclosure supporting the control circuit and the light board;
wherein when water contacts at least a portion of the track, at least a portion of a current flowing through the hot connector enters a ground conductor, thereby causing the leakage protection switch to electrically disconnect the LED lamp from a power supply.

US Pat. No. 10,145,531

LIGHT EMITTING DIODE STROBE LIGHTING SYSTEM

Huizhou Light Engine Limi...

1. A lens comprising:a base defining a cavity configured to accept one or more light sources;
one or more lens elements disposed on the base, the one or more lens segments being configured to direct light emitted from the one or more light sources out from the lens;
wherein the one or more lens elements are angularly positioned on the base with respect to an optical axis of the one or more light sources; and
wherein each of the one or more lens elements comprise an arced portion and linear portion, wherein the linear portion extends radially outward from the one or more light sources and meets the arced portion.