US Pat. No. 9,295,145

MULTIFUNCTION MAGNETIC DEVICE WITH MULTIPLE CORES AND COILS

Universal Lighting Techno...

1. An electronic ballast circuit comprising:
an AC power source;
a positive AC rail;
a negative AC rail coupled to the AC power source;
a resonant circuit including a resonant capacitor coupled between the positive AC rail and the negative AC rail;
first and second positive lamp terminals configured to couple to respective gas discharge lamps;
first and second negative lamp terminals configured to couple the negative AC rail to respective gas discharge lamps;
a magnetic device comprising
first and second magnetic cores each having an E-core configuration, the first and second magnetic cores being substantially
aligned to define first, second, and middle legs extending between first and second back walls;

the first leg, second leg, middle leg, and first and second back walls having a substantially equal width;
a first winding located on the first leg, the first winding coupled between the positive AC rail and the first positive lamp
terminal;

a second winding located on the second leg, the second winding coupled between the positive AC rail and the second positive
lamp terminal;

a third winding located on the middle leg, the third winding coupled between the AC power source and the positive AC rail,
the third winding configured to define a resonant inductor in the resonant circuit.

US Pat. No. 9,125,250

CONSTANT CURRENT CONTROL BASED ON INDIRECT CURRENT SENSING FOR CRITICAL CONDUCTION MODE BUCK CONVERTER

Universal Lighting Techno...

1. A buck converter operable to provide a predetermined average current to a load, said buck converter comprising:
first and second load terminals;
a primary inductor connected between a positive input of the converter and the first load terminal;
a primary inductor current integrator circuit functional to
sense current through the primary inductor,
provide a primary inductor current signal indicative of the current through the primary inductor,
induce, in the primary inductor, an integral of the sensed current through the primary inductor;
a switch connected between the second load terminal and a ground input of the converter; and
a controller operable to receive the primary inductor current signal and to control the switch as a function of the primary
inductor current signal, wherein

controlling the switch comprises turning the switch on and off,
the switch is operable to conduct current through the switch when turned on, and
the switch is operable to substantially prevent current flow through the switch when turned off.

US Pat. No. 9,295,143

WIRELESS CONTROLLED LIGHTING SYSTEM WITH SHARED SIGNAL PATH ON OUTPUT WIRES

Universal Lighting Techno...

1. A lighting system comprising:
first and second sets of power terminals;
a power stage comprising a power converter configured to provide power across the first set of power terminals, and a controller
configured to regulate the power provided by the power converter;

a load stage coupled to the second set of power terminals, wherein the power provided across the first set of power terminals
is received by the load stage and deliverable to a load comprising one or more lighting devices;

the load stage further comprising a dimming control signal receiver coupled across the second set of power terminals and configured
to receive an encoded dimming control signal; and

the power stage further comprising a dimming control signal decoder coupled across the first set of power terminals, and effective
to deliver a decoded dimming control signal to the controller.

US Pat. No. 9,173,256

DIMMABLE LED DRIVER BASED ON PARALLEL RESONANT CURRENT FED SELF-OSCILLATING TOPOLOGY

Universal Lighting Techno...

1. A driver circuit operable to provide power to a load from a direct current (DC) power rail, said driver circuit comprising:
a self-oscillating, current-fed parallel resonant inverter configured to connect to the DC power rail, receive DC power from
the DC power rail, and provide an alternating current (AC) output signal;

a current limiting circuit connected to the self-oscillating current fed parallel resonant inverter, wherein the current limiting
circuit is configured to receive the AC output signal from the self-oscillating current fed parallel resonant inverter and
provide an AC current signal as a function of a DC current provided to the load by the driver circuit; and

a rectifier connected to the current limiting circuit, wherein the rectifier is operable to receive the AC current signal
from the current limiting circuit and provide a DC current to the load.

US Pat. No. 9,066,406

LED DRIVER AND PROTECTION CIRCUIT FOR OUTPUT SHORT CONDITIONS

Universal Lighting Techno...

1. A driver circuit operable to provide current to a load from a direct current (DC) power source, the driver circuit comprising:
first and second output terminals coupled to a power rail and a circuit ground, respectively;
first and second switching elements coupled in series between the DC power source and one of the output terminals, each of
the first and second switching elements having a respective gate terminal;

a first energy storage device coupled to the gate terminals for the first and second switching elements and configured to
define a first gate charge time for the first and second switching element;

a failure detection circuit comprising
a third switching element having a gate terminal, the third switching element coupled on a first end to a node between the
DC power source and the first switching element,

a second energy storage device coupled to the gate terminal for the third switching element and configured to define a second
gate charge time for the third switching element, the second gate charge time being less than the first gate charge time,
and

a threshold device having a threshold voltage less than a maximum output voltage across the output terminals during a normal
operating mode of the driver circuit, the threshold device coupled to a node between the second energy storage device and
the gate terminal for the third switching element;

wherein the failure detection circuit is configured to block voltage from the gate terminal of the third switching element
during the normal operating mode, and

wherein the failure detection circuit is configured to charge the gate terminal of the third switching element during a failure
mode, further wherein the gate terminals of the first and second switching elements are shorted.

US Pat. No. 9,125,259

CONSTANT CURRENT DRIVE CIRCUIT FOR MULTI-CHANNEL LED LIGHTING

Universal Lighting Techno...

1. A driver circuit operable to provide current to a plurality of light sources from a direct current (DC) power source having
a power rail and a ground, the driver circuit comprising:
a half-bridge inverter having an input and an output, wherein the input is configured to connect to the power rail and the
ground of the DC power source and provide an alternating current (AC) signal at the output;

a resonant tank circuit comprising a resonant inductor and a resonant capacitor coupled in series between the output of the
half-bridge inverter and the ground of the DC power source;

an isolating transformer comprising a primary winding coupled between an output of the resonant tank circuit and the ground
of the DC power source, and a plurality of secondary windings;

a balancing transformer comprising a plurality of balancing windings; and
a plurality of output stages configured to provide an output power to a respective load, each of the output stages further
comprising

one of the balancing windings of the balancing transformer and one of the secondary windings of the isolating transformer
coupled in series, and

a rectifier circuit coupled to an output end of the series coupled windings.

US Pat. No. 9,521,724

METHOD FOR AUTOMATICALLY COMMISSIONING DEVICES USED IN BUILDING LIGHTING AND CONTROLS

UNIVERSAL LIGHTING TECHNO...

1. A method of commissioning one or more system devices installed in a lighting system and coupled to a communication link,
the lighting system including a system controller and at least one light fixture coupled to the communication link, said method
comprising:
receiving in the light fixture a commissioning command from the system controller via the communication link;
modulating a light output from the light fixture in response to the received commissioning command, the modulated light output
defining a unique commissioning code corresponding to the light fixture;

receiving the modulated light output at the one or more system devices;
demodulating the modulated light output in the one or more system devices to determine the commissioning code from a plurality
of unique commissioning codes; and

in response to the determined commissioning code, sending to the system controller via the communication link an acknowledgement
message from the one or more system devices.

US Pat. No. 9,420,670

CONTROLLER AND RECEIVER FOR A POWER LINE COMMUNICATION SYSTEM

Universal Lighting Techno...

1. A power line communication system for communicating a dimming level to an electronic ballast or LED driver as a lighting
circuit, the system comprising:
first and second AC power lines for transmitting an AC power signal to the lighting circuit;
a power line controller configured to generate a control signal having a signal pattern associated with a desired dimming
level and being coupled to one or more of the AC power lines to insert the control signal on the AC power signal;

a first resonant circuit coupled across the AC power lines and having a resonant frequency equivalent to a frequency of the
control signal from the power line controller; and

a power line receiver configured to receive the AC power signal with the control signal, including
a second resonant circuit connected in parallel with the AC power lines and operable to extract the control signal from the
AC power signal, and

a dimming level sensing circuit coupled to the second resonant circuit and configured to sense the signal pattern of the control
signal and generate a dimming level signal corresponding to the desired dimming level.

US Pat. No. 9,480,126

METHOD TO DETECT UNEVEN AC LOAD OR PARALLEL LOAD REMOVAL

Universal Lighting Techno...

1. A ballast configured to connect to a plurality of lamps and provide alternating current (AC) power to the plurality of
lamps, the ballast comprising:
an oscillator configured to receive direct current (DC) power from a DC power rail and provide the AC power to the plurality
of lamps;

a starting transformer comprising
a primary winding configured to connect in series with a first lamp of the plurality of lamps,
a first secondary winding configured to connect in series with a second lamp of the plurality of lamps, and
a second secondary winding; and
an unbalanced load sensing circuit connected to the second secondary winding of the starting transformer, wherein the unbalanced
load sensing circuit is configured to monitor a voltage across the second secondary winding of the starting transformer and
provide a shut down signal to the oscillator when the voltage across the second secondary winding of the starting transformer
exceeds a threshold;

wherein the oscillator is further configured to cease providing the AC power to the plurality of lamps in response to receiving
the shut down signal from the unbalanced load sensing circuit.

US Pat. No. 9,629,209

OFFLINE TUNING INTERFACE FOR LED DRIVERS

UNIVERSAL LIGHTING TECHNO...

1. An LED driver circuit comprising:
a power converter configured to generate an output voltage and an output current for driving an LED array;
a dimming interface circuit configured to generate a dimming control signal based on an input received across first and second
dimming input terminals during an online mode of operation;

a tuning interface circuit configured for coupling to at least the first dimming input terminal during an offline mode of
operation;

a controller configured during the online mode of operation to regulate the output voltage and the output current generated
by the power converter, based on the dimming control signal, a sensed output from the power converter, and programmed maximum
output voltage and maximum output current values; and

the controller is configured during the offline mode of operation to modify the programmed maximum output voltage and the
maximum output current values based on a predetermined sequence of digital pulses received via the tuning interface circuit.

US Pat. No. 9,095,022

CONSTANT CURRENT DRIVER BASED ON CRITICAL CONDITION MODE BUCK CONVERTER

Universal Lighting Techno...

1. A buck converter operable to provide a predetermined average current to a load, said buck converter comprising:
a converter positive input, a first load terminal and a second load terminal;
a primary inductor connected between the converter positive input and the first load terminal;
a primary inductor current sensing circuit effective to sense current through the primary inductor and provide a primary inductor
current signal indicative of the current through the primary inductor;

a switch connected between the second load terminal and a ground input of the converter;
a switch current sensing circuit effective to sense an instantaneous current through the switch and provide an instantaneous
current signal indicative of the sensed instantaneous current through the switch; and

a controller operable to receive the primary inductor current signal and the instantaneous current signal and control the
switch as a function of the primary inductor current signal and the instantaneous current signal, wherein:

controlling the switch comprises turning the switch on and off;
the switch is operable to conduct current through the switch when turned on; and
the switch is operable to substantially prevent current flow through the switch when turned off.

US Pat. No. 9,370,061

HIGH POWER FACTOR CONSTANT CURRENT BUCK-BOOST POWER CONVERTER WITH FLOATING IC DRIVER CONTROL

Universal Lighting Techno...

1. An LED driver circuit comprising:
first and second DC input terminals, the second DC input terminal coupled to a first circuit ground;
a switching circuit block comprising a switching element having first and second power terminals coupled on a first end to
the first DC input terminal and on a second end to a second circuit ground; and

an output circuit block comprising
a buck-boost inductor coupled on a first end to the first circuit ground and on a second end to the second circuit ground,
a current sensor coupled on a first end to the second circuit ground and on a second end directly to a feedback input terminal
on the controller, and

a capacitor coupled in parallel with the current sensor, wherein an AC current component is filtered from a feedback current
signal;

wherein the switching element is configured to drive an LED load coupled between the second circuit ground and the feedback
input terminal on the controller with a substantially constant current based on driving signals provided to a control terminal
from a controller.

US Pat. No. 9,293,246

MAGNETIC COMPONENT WITH INTEGRATED COMPONENT CIRCUIT BOARD

Universal Lighting Techno...

1. A magnetic component apparatus for mounting on a main printed circuit board, comprising:
a bobbin comprising at least one winding and first and second bobbin rails;
first and second terminal pins respectively mechanically connected to the first and second bobbin rails, the first and second
terminal pins being electrically connected to the at least one winding and being configured to protrude from the bobbin;

a component printed circuit board mounted on the first and second terminal pins and configured to fit between the bobbin and
the main printed circuit board; and

wherein the first and second terminal pins are configured to each provide electrical connection between the bobbin, the component
printed circuit board, and the main printed circuit board, and wherein the magnetic component apparatus is configured to provide
a gap between the component printed circuit board and the main printed circuit board.

US Pat. No. 9,518,716

LINEAR WIDE AREA LIGHTING SYSTEM

UNIVERSAL LIGHTING TECHNO...

1. A lighting apparatus, comprising:
a substrate having first and second opposing sides, the substrate extending longitudinally in a first direction;
a base defining a substrate channel shaped to receive the substrate, wherein the substrate is installed in the substrate channel
of the base;

a longitudinal mounting groove defined in the base;
a longitudinal mounting flange disposed on the base, wherein the longitudinal mounting flange of the base is shaped to be
received in a longitudinal mounting groove on a like base;

at least one linear light emitter array disposed on at least one of the first and second opposing sides of the substrate,
the array extending longitudinally in the first direction, the light emitter array comprising a plurality of light sources,
each light source extending perpendicularly from the at least one of the first and second opposing sides of the substrate
in a second direction, the second direction perpendicular to the first direction;

an elongated refractive lens positioned over the substrate, the lens having a longitudinal axis extending in the first direction,
the lens having a two-dimensional light refraction profile substantially transverse to the longitudinal axis, the lens including
a longitudinal bore extending from a first end of the lens to a second end of the lens, the bore of the lens comprising a
longitudinal recess facing the substrate, the plurality of light sources extending into the longitudinal bore; and

a first mounting structure coupled to the substrate, the first mounting structure including at least a first longitudinal
mounting slot, the first longitudinal mounting slot extending in the first direction parallel to the longitudinal axis, the
first longitudinal mounting slot displaced away from the substrate in a third direction, the third direction perpendicular
to the first direction and perpendicular to the second direction.

US Pat. No. 9,183,974

BOBBIN APPARATUS FOR REDUCING GAP LOSSES IN MAGNETIC COMPONENTS

Universal Lighting Techno...

1. A bobbin apparatus for supporting a core assembly, the core assembly including an air gap having an axial gap distance,
the bobbin apparatus comprising:
a bobbin body having a first bobbin end and a second bobbin end, the second bobbin end spaced from the first bobbin end;
an axial passage defined through the bobbin body between the first and second bobbin ends, the bobbin body including an inner
passage surface substantially facing the axial passage, the core assembly insertable into the axial passage with the air gap
of the core assembly located at an air gap position between the first and second bobbin ends;

a winding surface disposed on the bobbin body between the first and second bobbin ends; and
a step having an outer step surface protruding from the winding surface between the first and second bobbin ends, the step
located on the winding surface in substantial alignment with the air gap position, the step having a step height defined as
the distance between the inner passage surface and the outer step surface, wherein the step height is at least as great as
the axial gap distance, wherein the step further comprises an axial step width at least as great as twice the axial gap distance.

US Pat. No. 9,125,252

POWER LINE COMMUNICATION SYSTEM AND METHOD FOR CONTROL OF LAMP DIMMING

Universal Lighting Techno...

1. A lighting control method comprising:
receiving at an electronic ballast an AC signal transmitted across an AC power line, the AC signal comprising a first set
of message frames and a second set of message frames,

each message frame comprising a pattern of energy bursts provided at respective zero crossings,
the first set of message frames comprising a bit pattern corresponding to a lighting zone associated with the ballast,
the second set of message frames comprising one or more hamming-encoded bit patterns corresponding to respective hexadecimal
digits of a desired power level;

upon detecting the second set of message frames, decoding the hamming-encoded digits and immediately adjusting an output current
of the ballast to a value proportional to the desired power level; and

upon failing to detect the second set of message frames, determining the desired power level over time based on a pattern
density corresponding to the lighting zone, and adjusting the output current of the ballast accordingly.

US Pat. No. 9,396,865

MAGNETIC COMPONENT WITH AUXILIARY WINDING CIRCUIT BOARD

Universal Lighting Techno...

1. A magnetic component apparatus, comprising:
a bobbin having a first end flange and a second end flange, and having an axial passage extending through the bobbin;
a core having at least a first main body portion and having at least one leg extending from the main body portion, the at
least one leg positionable in the axial passage;

a main winding wound around the bobbin between the first end flange and the second end flange;
at least one substantially planar auxiliary winding circuit board having an opening, the auxiliary winding circuit board having
a first auxiliary winding disposed at least partially around the opening, the auxiliary winding circuit board positioned between
the first end flange of the bobbin and the at least a first main body portion of the core with the at least one leg of the
core extending through the opening of the auxiliary winding circuit board;

an auxiliary terminal pin rail disposed on the auxiliary winding circuit board; and
a first fastener component disposed on the bobbin and a second fastener component disposed on the auxiliary winding circuit
board, the first fastener component selectively engageable with the second fastener component to removably mount the auxiliary
winding circuit board to the bobbin.

US Pat. No. 9,190,830

OVERCURRENT PROTECTION CIRCUIT AND METHOD FOR AN LED DRIVER

Universal Lighting Techno...

1. A current limiting circuit for a direct current (DC) driver circuit, wherein the DC driver circuit includes a positive
lead and a ground lead and is operable to provide power to a load connected to first and second load terminals, the current
limiting circuit comprising:
a positive input terminal configured to connect to the positive lead of the DC driver circuit;
a ground input terminal configured to connect to a ground lead of the DC driver circuit;
a positive output terminal configured to connect to the first load terminal;
a ground output terminal configured to connect to the second load terminal;
an output switch connected between the positive input terminal and the positive output terminal, the output switch comprising
a control terminal and operable to provide a low resistance current path from the positive input terminal to the positive
output terminal when closed and to substantially prevent current flow from the positive input terminal to the positive output
terminal when open;

a control circuit connected to the control terminal of the output switch, wherein the control circuit is effective to
sense an output voltage between the positive output terminal and the ground output terminal;
close the output switch via the control terminal of the output switch when the output voltage exceeds a predetermined voltage
limit; and

open the output switch via the control terminal of the output switch when the output voltage is less than or equal to the
predetermined voltage limit.

US Pat. No. 9,520,711

GATE DRIVE INTEGRATED CIRCUIT WITH INPUT LINE OVERVOLTAGE PROTECTION FOR A HALF-BRIDGE POWER CONVERTER

UNIVERSAL LIGHTING TECHNO...

1. A driver circuit operable to provide power from a power source to a load, said driver circuit comprising:
an input stage operable to receive power from the power source and provide a direct current (DC) power rail, wherein a voltage
of the DC power rail is substantially proportional to a voltage of the power source;

an output stage operable to receive power from the DC power rail and provide output power to the load when operating,
wherein the output stage comprises a half-bridge inverter comprising a pair of switches, at least one of the pair of switches
having a rated voltage;

a controller configured to:
operate the output stage such that the output stage provides power to the load;
determine a voltage of the DC power rail; and
cease operating the output stage when the determined voltage of the DC power rail exceeds a predetermined threshold of approximately
the rated voltage of the at least one switch of the pair of switches, such that the output stage ceases providing power to
the load; and wherein the controller comprises

a pulse width modulation module configured to provide gate drive signals to the output stage, and
an overvoltage sensing module configured to
determine the voltage of the DC power rail and
disable the pulse width modulation module by blocking a bias voltage of the controller from the pulse width modulation module
when the determined voltage of the DC power rail exceeds the predetermined threshold.

US Pat. No. 9,279,564

INDIRECT AREA LIGHTING APPARATUS AND METHODS

Universal Lighting Techno...

1. An overhead lighting fixture apparatus for illuminating an illumination area below the lighting fixture apparatus and not
above the lighting fixture apparatus, the lighting fixture apparatus comprising:
a light source configured to emit light to illuminate the illumination area;
a primary reflector disposed between the light source and the illumination area below the lighting fixture apparatus to intercept
the light emitted by the light source, the primary reflector including a primary concave surface substantially facing the
light source, the primary concave surface having substantially specular reflectivity, the primary reflector reflecting at
least a first portion of the intercepted light in a direction away from the illumination area; and

a secondary reflector including a secondary concave surface at least partially facing the primary concave surface to receive
the first portion of the intercepted light from the primary concave surface, the secondary concave surface facing toward the
illumination area, the secondary concave surface having substantially diffuse reflectivity, the secondary reflector reflecting
the first portion of intercepted light toward the illumination area below the lighting fixture apparatus, the secondary reflector
blocking the first portion of the intercepted light from illuminating any area above the lighting fixture apparatus, wherein
the secondary reflector is positioned with respect to the primary reflector and the primary reflector is positioned with respect
to the light source such that all light incident on the illumination area below the lighting fixture apparatus from the light
source is reflected by at least one of the primary concave surface and the secondary concave surface.

US Pat. No. 9,369,050

INDIRECT CURRENT SENSING METHOD FOR A CONSTANT CURRENT FLYBACK CONVERTER

Universal Lighting Techno...

1. A flyback power converter comprising:
a flyback transformer having magnetically coupled first, second and third windings;
a primary circuit comprising a switching element coupled in series with the first winding and a controller configured to drive
the switching element wherein a current is provided through the first winding;

a secondary circuit galvanically isolated from the primary circuit and comprising a load coupled across the second winding;
and

a feedback circuit coupled across the third winding and galvanically isolated from the secondary circuit, the feedback circuit
configured to generate a feedback signal to the controller representative of an output current through the load;

wherein the controller is further configured to
regulate the output current through the load based on the feedback signal from the feedback circuit, and
regulate the output current through the load by generating driving signals to turn the switching element on and off based
on a comparison of the feedback signal from the feedback circuit to a reference value corresponding to a desired output current
through the load;

wherein the feedback signal comprises a feedback voltage that is proportional to the output current through the load; and
wherein the feedback circuit comprises
an energy storage device coupled in parallel with the third winding,
a first branch coupled between the energy storage device and the third winding, and
a second branch coupled in parallel with the first branch between the energy storage device and the third winding,
wherein the energy storage device is charged through the first branch during an on-time of the switching element in the primary
circuit, and

the energy storage device discharges through the second branch during an off-time of the switching element in the primary
circuit.

US Pat. No. 9,236,179

MAGNETIC COMPONENT APPARATUS WITH INTERCONNECTABLE BOBBINS

Universal Lighting Techno...

1. An interconnectable bobbin apparatus comprising a first bobbin positionable on a first leg of a multi-leg core and a second
bobbin positionable on an adjacent leg of the multi-leg core, wherein the first leg and the adjacent leg are parallel and
are not longitudinally aligned with each other, each of the first bobbin and the second bobbin comprising:
a bobbin body having an axial passage to receive the first leg of the multi-leg core, the axial passage extending axially
from an outer face of a first end flange to an outer face of a second end flange, the second end flange positioned at an opposite
end of the axial passage with respect to the first end flange, each of the first end flange and the second end flange having
a respective inner face in a plane normal to the axial passage, the bobbin body configured to receive a winding wound from
the inner face of the first end flange to the inner face of the second end flange; and

a first fastener element on the outer face of the first end flange of one of the first bobbin and the second bobbin, the first
fastener element configured to engage a second fastener element on the outer face of the first end flange of the other of
the first bobbin and the second bobbin with at least a portion of the outer face of the first end flange of the first bobbin
positioned against at least a portion of the outer face of the first end flange of the second bobbin and with the first fastener
element of the first bobbin aligned with the second fastener element of the second bobbin.

US Pat. No. 9,136,054

REDUCED LEAKAGE INDUCTANCE TRANSFORMER AND WINDING METHODS

Universal Lighting Techno...

1. An electrical transformer comprising:
a core;
a primary winding wound around the core, the primary winding comprising a first number of primary winding layers, each primary
winding layer comprising a second number of primary layer winding turns per layer, the primary winding turns in all of the
plurality of primary winding layers electrically connected in series such that the primary winding has an effective total
number of primary winding turns equal to the first number of primary winding layers times the second number of primary winding
turns per layer; and

a secondary winding wound around the core, the secondary winding comprising a third number of secondary winding layers, each
secondary winding layer comprising a fourth number of secondary layer winding turns per layer, the secondary winding turns
in all of the secondary winding layers electrically connected in parallel such that the effective number of turns of the secondary
winding is equal to the fourth number of secondary winding turns per layer thereby providing a turns ratio of the primary
winding to the secondary winding corresponding to the effective total number of primary winding turns divided by the fourth
number of turns in each layer of the secondary winding, the secondary winding layers wound around the core interleaved with
the primary winding layers to separate each secondary winding layer from an adjacent secondary winding layer by one of the
primary winding layers and to separate each primary winding layer from an adjacent primary winding layer by one of the secondary
winding layers.

US Pat. No. 9,099,333

LED LAMP DEVICE HAVING A FLUORESCENT ELEMENT SHAPED FOR UNIFORM LIGHT CONVERSION

Universal Lighting Techno...

1. An LED lamp device comprising;
a substrate;
a plurality of LED elements positioned in a 2×2 array on the substrate and effective to emit light having a first wavelength,
and further comprising a cross-sectional space defined between each adjacent LED element; and

a fluorescent element having an inner surface and an outer surface, the fluorescent element comprising:
a fluorescent material excitable by light emitted from the LED elements to emit light of a second wavelength, wherein the
fluorescent element is arranged to cover each LED element and the cross-sectional spaces with no gaps provided between an
inner surface of the fluorescent element and the substrate;

a plurality of cross-sectional grooves formed in the outer surface, the cross-sectional grooves positioned in accordance with
the positioning of the LED elements and substantially aligned with the spaces defined between adjacent LED elements, the cross-sectional
grooves causing distances traveled by light at the first wavelength propagating through the fluorescent material in different
directions to be substantially uniform such that a proportion of light of the first wavelength with respect to light of the
second wavelength is substantially uniform irrespective of light exit direction from the LED elements;

a plurality of side surfaces extending along the circumference of the fluorescent element and perpendicular to a surface of
the substrate upon which the LED elements are positioned, each side surface having a distal edge disposed away from the surface
of the substrate; and

a plurality of inclined surfaces along a circumference of the fluorescent element, wherein each of the inclined surfaces extends
from the outer surface of the fluorescent material to the distal edge of an adjacent side surface.

US Pat. No. 9,237,636

SELF-CLAMPED RESONANT FILAMENT HEATING CIRCUIT

Universal Lighting Techno...

1. An electronic ballast comprising:
an inverter circuit comprising a power supply having positive and negative output terminals, a controller, and a pair of switching
elements coupled between the positive and negative terminals of the power supply, the switching elements responsive to control
signals from the controller to oscillate at an operating frequency and to generate an output voltage at an inverter output
terminal between the switching elements;

a main inverter tank comprising a resonant inductor and a resonant capacitor coupled in series between the inverter output
terminal and the negative terminal of the power supply; and

a filament heating circuit further comprising
a primary winding of a filament heating transformer having a first end coupled to the resonant inductor and a second end coupled
to a first capacitor,

a second capacitor coupled between the first capacitor and the negative terminal of the power supply, and
a clamping circuit coupled to the second capacitor and configured to, during a preheat mode of operation, clamp an amplitude
of the voltage across the primary winding of the filament heating transformer to an amplitude of the input voltage from the
power supply.

US Pat. No. 9,462,655

CIRCUIT AND METHOD FOR MONITORING FUNCTIONALITY OF AN ELECTRONIC SURGE SUPPRESSOR

UNIVERSAL LIGHTING TECHNO...

1. A surge protection device for a dimmable lighting system, the device comprising:
a first input line;
a first impedance network coupled to the first input line;
a dimming control circuit coupled to the first impedance network and configured in a first impedance mode to provide an analog
output associated with full lighting output of an LED device, and in a second impedance mode to provide an analog output associated
with dimmed lighting output of the LED device;

a second input line, wherein the first impedance network is coupled between the first input line and the second input line;
the first impedance network comprising a thermal cutoff device coupled in series with a clamping device, the dimming control
circuit coupled to a node between the thermal cutoff device and the clamping device; and

the dimming control circuit comprising a resistor network which provides a 0-10 V analog dimming input signal to an analog
dimming input terminal for an LED device controller.

US Pat. No. 9,240,726

DIMMING LED DRIVER CIRCUIT WITH DYNAMICALLY CONTROLLED RESONANT TANK GAIN

Universal Lighting Techno...

6. A light fixture configured to receive alternating current (AC) power from a power supply and provide light, the light fixture
comprising:
a light source configured to provide light in response to receiving a current;
an input stage configured to receive AC power from the power supply and provide a direct current (DC) power rail;
a driver circuit configured to provide the current to the light source, the driver circuit comprising
a half-bridge inverter having an input, an output, and a circuit ground, wherein the input is connected to the DC power rail
of the input stage,

a resonant tank circuit having an input and an output, wherein the input is connected to the output of the half-bridge inverter,
an output transformer having an input connected to the output of the resonant tank circuit,
a rectifier connected between the output transformer and the light source, and
a variable capacitance circuit connected between the output of the half-bridge inverter and the circuit ground of the half-bridge
inverter, wherein the variable capacitance circuit is configured to vary a capacitance of the variable capacitance circuit
as a function of a control signal;

a housing configured to support the light source, the input stage, and the driver circuit;
the rectifier has an output ground isolated from the circuit ground of the half-bridge inverter by the output transformer;
the driver circuit further comprises a dimming controller configured to receive a dimming signal and provide the control signal
to the variable capacitance circuit as a function of the received dimming signal;

the dimming controller is referenced to the output ground of the rectifier; and
the variable capacitance circuit comprises
a dimming capacitor,
a switch connected in series with the dimming capacitor between the output of the half-bridge inverter and the ground of the
half-bridge inverter,

an opto-coupler connected between the dimming controller and the switch,
wherein the opto-coupler is configured to provide the control signal from the dimming controller to the switch and provide
electrical isolation between the circuit ground and the output ground,

a pull down resistor connected to the control terminal of the switch, and
a DC voltage source connected in series with the pull down resistor between the control terminal of the switch and the circuit
ground of the half-bridge inverter.

US Pat. No. 9,115,877

MOUNTING APPARATUS FOR A LIGHT EMITTING DIODE MODULE

Universal Lighting Techno...

1. An expandable support bracket for supporting a light emitting diode module in a lighting fixture, comprising:
a first bracket rod;
a second bracket rod pivotally attached to the first bracket rod at a pivoting rod joint; and
a rod flange protruding from the pivoting rod joint, the rod flange configured to secure the support bracket to the lighting
fixture,

wherein the first bracket rod is shaped to mount the light emitting diode module.

US Pat. No. 9,093,212

STACKED STEP GAP CORE DEVICES AND METHODS

Universal Lighting Techno...

1. A core apparatus for a magnetic component, comprising:
a first E-core having a first core thickness and including
a first outer first core leg and a second outer first core leg, each having an outer first core leg length, and
a middle first core leg having a middle first core leg length, the middle first core leg length being less than the outer
first core leg length by a middle first core offset;

a second E-core having a second core thickness and including
a first outer second core leg and a second outer second core leg, each having an outer second core leg length, and
a middle second core leg having a middle second core leg length greater than the middle first core leg length, the middle
second core leg length being less than the outer second core leg length by a middle second core offset less than the middle
first core offset;

wherein the first and second E-cores are stacked against each other such that the middle first core leg and the middle second
core leg extend in substantially the same direction;

wherein a difference between the middle first core offset and the middle second core offset forms a stepped end profile at
exposed ends of the middle first core leg and the middle second core leg; and

a third E-core positioned opposite the stacked first and second E-cores, the third E-core being a single non-stacked core
and including a first outer third core leg, a second outer third core leg, and a middle third core leg, the middle third core
leg having a constant middle third core leg length extending toward the stacked middle first and second core legs, the middle
third core leg being shorter than the first and second outer third core legs by a middle third core leg offset, the middle
third core leg offset being less than the middle second core offset, the third E-core having a third core thickness substantially
equal to the sum of first and second core thicknesses.

US Pat. No. 9,416,951

COMPACT INDIRECT LIGHTING SYSTEM WITH IMPROVED THERMAL PERFORMANCE

Universal Lighting Techno...

1. A lighting apparatus comprising:
a light source comprising a plurality of light emitting devices, the light sources emitting light in a first range of directions;
a primary optical surface configured to receive light emitted from the light emitting devices of the light source and to reflectively
redirect the light in a second range of directions;

a secondary optical surface configured to receive the reflectively redirected light from the primary optical surface and to
reflectively redirect the light in a primary emission direction, the primary emission direction being within the first range
of directions;

a central opening through the apparatus, the central opening having a boundary and defining a convective path within the boundary;
and

a heat spreader positioned in the central opening, the plurality of light emitting devices mounted to the heat spreader outside
the boundary of the central opening, the light emitting devices thermally coupled to the heat spreader, the heat spreader
having at least one through-hole that allows air flow through the heat spreader.

US Pat. No. 9,237,613

CONSTANT CURRENT CONTROL FOR AN LED DRIVER CIRCUIT USING A MICROCONTROLLER-BASED OSCILLATOR CONTROLLED BY A DIFFERENTIAL ERROR FEEDBACK SIGNAL FROM A PROPORTIONAL AND INTEGRATION CONTROL LOOP

Universal Lighting Techno...

1. A constant current driver circuit comprising:
a current source tank circuit configured to receive power from a power source and provide an output current to a load as a
function of a control signal;

a controller having a circuit ground, an error signal input, and a control signal output, wherein
the control signal output is configured to provide the control signal to the current source tank circuit, and
the controller is configured to adjust the control signal as a function of an error signal received at the error signal input,
wherein the error signal is referenced to the circuit ground;

an output current sensing circuit operable to sense the output current provided by the current source tank circuit to the
load and provide an amplified current sensing signal indicative of the sensed output current provided to the load; and

a differential error circuit having an output current sensing input and a reference current input, wherein the differential
error circuit is configured to

receive the amplified current sensing signal from the output current sensing circuit at the output current sensing input,
receive a reference current signal at the reference current input; and
determine a difference between the received amplified current sensing signal and the received reference current signal, and
provide the error signal to the error signal input of the controller.

US Pat. No. 9,431,893

STABILITY CONTROL OF A POWER FACTOR CORRECTION CIRCUIT USING ADAPTIVE MULITPLIER VOLTAGE FEEDBACK

Universal Lighting Techno...

1. An adaptive multiplier feedback control circuit for a power factor correction (PFC) circuit, said adaptive multiplier feedback
control circuit comprising:
a current sensor operable to sense a current of the PFC circuit;
an output stage operable to provide a multiplier voltage to the PFC circuit, wherein the provided multiplier voltage is directly
related to the current of the PFC circuit;

the PFC circuit includes a ground, a positive input, output current sensing resistor, and a controller having a multiplier
voltage input; and

the output stage comprises
a pull-up resistor coupled between the positive input of the PFC circuit and the multiplier voltage input of the controller
of the PFC circuit, and

a p-type transistor having a first terminal coupled to the multiplier voltage input of the controller of the PFC circuit,
a second terminal coupled to the ground of the PFC circuit, and a control terminal coupled to the output current sensing resistor
of the PFC circuit, wherein the control terminal is coupled to the output current sensing resistor of the PFC circuit via
an input resistor of the adaptive multiplier feedback control circuit.

US Pat. No. 9,419,514

HIGH POWER FACTOR DC POWER SUPPLY WITH VARIABLE GAIN CONVERTER AND FAST-AVERAGING CONTROL LOOP

Universal Lighting Techno...

10. A light fixture configured to receive alternating current (AC) power from an AC power source and provide light, said light
fixture comprising:
a light source operable to provide light in response to receiving power;
a driver circuit operable to receive power from the AC power source and provide DC power to the light source, said driver
circuit comprising

a power factor correction (PFC) circuit configured to receive AC power from the AC power source and provide a DC power rail,
wherein the DC power rail has a maximum peak voltage and a minimum peak voltage corresponding to a ripple voltage having a
frequency,

a DC to DC converter configured to receive power from the DC power rail and provide a DC output voltage or current to the
light source from a DC output of the DC to DC converter as a function of a control signal, and

a closed loop control circuit configured to
determine at least one of a voltage across the light source or a current through the light source,
set a nominal operating frequency for the DC to DC converter as a function of the determined voltage or current, and
provide the control signal to the DC to DC converter as a function of the DC power rail, wherein a control signal associated
with a minimum operating frequency corresponds to the minimum peak voltage for the DC power rail, and a control signal associated
with a maximum operating frequency corresponds to the maximum peak voltage for the DC power rail,

wherein the closed loop control circuit has a low pass crossover frequency greater than the frequency of the ripple voltage
of the PFC circuit; and

a housing supporting the light source and the driver circuit.

US Pat. No. 9,363,862

AUTOMATIC CURRENT AND REFERENCE GAIN CONTROL FOR WIDE RANGE CURRENT CONTROL

Universal Lighting Techno...

1. A constant current driver circuit comprising:
a current source tank circuit configured to receive power from a power source and provide an output current to a load as a
function of a control signal;

the current source tank circuit including a circuit ground;
a controller having an output current sensing input, a reference current input, and a control signal output;
the control signal output is configured to provide the control signal to the current source tank circuit;
the controller is configured to adjust the control signal as a function of a sensed output current received at the output
current sensing input and a sensed reference current received at the reference current input;

an output current sensing circuit operable to sense the output current provided by the current source tank circuit to the
load and provide an amplified current sensing signal to the output current sensing input of the controller;

a gain control circuit operable to
receive a reference current signal,
adjust a gain of the output current sensing circuit as a function of the received reference current signal, and
provide a modified reference current signal to the reference current input of the controller as a function of the received
reference current signal; and

the output current sensing circuit comprises
a current sensing resistor having a first terminal configured to connect to the load and a second terminal connected to the
circuit ground,

a current sensing amplifier having an inverting input, a non-inverting input, and an output connected to the output current
sensing input of the controller,

a first resistor connected between the inverting input of the current sensing amplifier and the output of the current sensing
amplifier, and

a second resistor connected between the inverting input of the current sensing amplifier and the circuit ground.

US Pat. No. 9,583,073

ADAPTIVE STARTUP METHOD FOR CONSTANT CURRENT LED DRIVERS

UNIVERSAL LIGHTING TECHNO...

1. A controller for an LED driver circuit configured to provide an output current to an LED load, the controller comprising:
at least a first input to receive a sensed current provided to the LED load;
at least a first output to provide driving control signals to the LED driver circuit as a function of the sensed current to
maintain the sensed current at a target current;

wherein the controller is programmed during a startup mode of operation to provide driving control signals further as a function
of a first defined maximum output voltage value for the LED driver circuit,

wherein the controller is programmed during a steady state mode of operation to provide driving control signals further as
a function of a second defined maximum output voltage value;

at least a second input to receive a dimming signal from a dimming circuit; and
wherein the controller is operable to control the current provided to the LED load further as a function of the received dimming
signal by adjusting the target current as a function of the received dimming signal.

US Pat. No. 9,490,058

MAGNETIC COMPONENT WITH CORE GROOVES FOR IMPROVED HEAT TRANSFER

Universal Lighting Techno...

1. A magnetic component apparatus for an electronic circuit, comprising:
a core having an outer core perimeter, an upper core surface, and an end core surface;
an end beveled edge between the upper core surface and the end core surface;
a bobbin disposed about the core;
a conductive winding disposed about the bobbin; and
the core further comprising a plurality of surface grooves in the outer core perimeter;
an enclosure having an enclosure wall surrounding the core, with a gap defined between the core and the enclosure wall;
a gap filler disposed between the enclosure wall and the core; and
wherein the gap filler extends partially into at least one of the plurality of surface grooves.

US Pat. No. 9,379,533

INPUT SURGE PROTECTION CIRCUIT AND METHOD FOR AN LED LOAD

Universal Lighting Techno...

1. A light fixture comprising:
a non-isolated DC-DC power converter having an input connected to circuit ground of a DC power source and further configured
to provide an output to drive a light source;

a chassis configured to house the light source and to be coupled to earth ground; and
a surge protection circuit comprising
a series circuit of a first capacitor and a voltage triggering device having a breakdown voltage value,
a second capacitor coupled in parallel with the voltage triggering device,
the surge protection circuit is coupled on one end to earth ground and is configured to clamp a voltage between the light
source and the earth ground to a light source threshold value associated with a capacitance value of the first capacitor during
a surge condition;

the surge protection circuit is coupled on a second end to the output of the DC-DC converter, and
wherein a capacitance value of the second capacitor is selected based upon an impedance value of the voltage triggering device
during normal operation to prevent false triggering of the voltage triggering device.

US Pat. No. 9,307,587

CONSTANT CURRENT SOURCE BASED ON SELF-OSCILLATING SOFT-SWITCHING LLC CONVERTER TOPOLOGY

Universal Lighting Techno...

1. A driver circuit operable to provide power to a load from a direct current (DC) power rail, the driver circuit comprising:
a self-oscillating inductor-inductor-capacitor (LLC) series resonant inverter configured to connect to the DC power rail,
receive DC power from the DC power rail, and provide an alternating current (AC) output signal;

a current limiting capacitor connected to the self-oscillating LLC series resonant inverter, wherein the current limiting
capacitor is configured to receive the AC output signal from the self-oscillating LLC series resonant inverter and provide
an AC current signal;

a rectifier circuit connected to the current limiting capacitor, wherein the rectifier circuit is configured to receive the
AC current signal from the current limiting capacitor and provide a DC current to the load; and

wherein the DC power rail has an associated ground, and the self-oscillating LLC series resonant inverter comprises
a first switch having a first terminal connected to the DC power rail, a second terminal, and a control terminal,
a second switch having a first terminal connected to the second terminal of the first switch, a second terminal connected
to the ground associated with the DC power rail, and a control terminal,

a resonant capacitor having a first terminal and a second terminal, wherein the first terminal is connected to the ground
associated with the DC power rail, and

a transformer having a primary winding, a first secondary winding, a second secondary winding, and an output secondary winding,
wherein

the primary winding of the transformer is connected between the second terminal of the first switch and the second terminal
of the resonant capacitor,

the first secondary winding is connected between the control terminal of the first switch and the second terminal of the first
switch,

the second secondary winding is connected between the control terminal of the second switch and the second terminal of the
second switch, and

the output secondary winding is configured to provide the AC output signal.

US Pat. No. 9,055,651

CIRCUIT AND METHOD FOR MONITORING AND REPORTING THE REMAINING USEFUL LIFE OF AN LED MODULE

Universal Lighting Techno...

1. A light source comprising:
a light emitting diode (LED) configured to connect to a driver circuit and operable to provide light in response to receiving
power from the driver circuit;

a controller integrally connected with the LED and operable to receive power from the driver circuit when the driver circuit
is providing power to the LED, said controller comprising

a counter operable to periodically increment a count stored in a counter memory of the controller only when the controller
is receiving power from the driver circuit, wherein when the count reaches a predetermined limit, the count restarts, and

a nonvolatile memory operable to store a representation of a number of times the controller has restarted the count; and
wherein the counter memory is a volatile memory, and the controller further comprises
a power regulator integrally connected with the LED, wherein the power regulator is operable to receive power from the driver
circuit, regulate the received power to a stable voltage, and provide the stable voltage, and

a microprocessor operable to receive the stable voltage from the power regulator, wherein the controller is receiving power
from the driver circuit when the microprocessor is receiving the stable voltage from the power regulator, said microprocessor
comprising

the counter,
the counter memory,
the nonvolatile memory, wherein the nonvolatile memory stores computer executable instructions for restarting the count by
resetting the counter to zero when the count reaches the predetermined limit, and incrementing the representation of the number
of times that the counter has been restarted in the nonvolatile memory in response to restarting the counter, and

an arithmetic logic unit operable to execute the computer executable instructions stored in the nonvolatile memory.

US Pat. No. 9,723,695

POWER LINE COMMUNICATION METHOD AND APPARATUS USING DOWNSTREAM CURRENT MODULATION

Universal Lighting Techno...

1. A lighting control system for controlling a plurality of lighting devices via a mains power transmission network, wherein
each of the plurality of lighting devices is disposed within a respective one of a plurality of defined areas and associated
with one or more occupancy sensors configured to determine an occupancy status for the respective defined area, the lighting
control system comprising:
a primary controller configured to be electrically coupled to each of the plurality of lighting devices via the mains power
transmission network; and

the primary controller is configured to identify a predetermined pattern of a current adjustment and to generate and send
corresponding control signals for each of the plurality of lighting devices via the mains power transmission network, and
generate control signals directing each of the plurality of lighting devices to illuminate upon identifying a change from
a first occupancy status to a second occupancy status,

wherein the primary controller is further configured to activate a timer having a defined duration upon identifying the change
from the first occupancy status to the second occupancy status,

wherein at least one of the plurality of lighting devices includes local control circuitry configured to determine a local
condition of continued occupancy for the respective defined area prior to lapsing of the defined timer duration, and adjust
an operating current to a respective light source according to a corresponding predetermined pattern,

wherein the primary controller is configured to generate control signals directing each of the plurality of lighting devices
to maintain illumination of the respective light sources upon identifying said predetermined pattern via the mains power transmission
network.

US Pat. No. 9,362,044

MAGNETIC COMPONENT WITH MULTIPLE PIN ROW BOBBIN

Universal Lighting Techno...

1. A magnetic component apparatus comprising:
a core;
a bobbin comprising:
a bobbin body, the bobbin body having a first end and a second end, having a longitudinal axis, and having a passage extending
through the bobbin body from the first end to the second end along the longitudinal axis;

a first pin rail fixed to the first end of the bobbin body and extending outward in a first direction away from the bobbin
body, the first direction parallel to the longitudinal axis, the first pin rail having a first inner side directed toward
the second end of the bobbin body and having a first lower side, the first lower side facing away from the passage in a direction
perpendicular to the first direction, the first lower side substantially transverse to the longitudinal axis; and

a second pin rail fixed to the second end of the bobbin body and extending outward in a second direction away from the bobbin
body, the second direction parallel to the longitudinal axis and opposite the first direction, the second pin rail having
a second inner side directed toward the first end of the bobbin body and having a second lower side, the second lower side
facing away from the passage in a direction perpendicular to the second direction, the second lower side substantially transverse
to the longitudinal axis;

a first pin row located on the first pin rail, the first pin row comprising a first plurality of straight pins, each pin in
the first pin row extending perpendicularly from the first lower side of the first pin rail, each pin in the first pin row
displaced at least a first distance from the first inner side of the first pin rail;

a second pin row located on the first pin rail, the second pin row comprising a second plurality of straight pins, each pin
in the second pin row extending perpendicularly from the first lower side of the first pin rail, each pin in the second pin
row displaced at least a second distance from the first inner side of the first pin rail, the second distance greater than
the first distance such that the second pin row is located at a longitudinally exterior position with respect to the first
pin row;

a third pin row located on the second pin rail, the third pin row comprising a third plurality of straight pins, each pin
in the third pin row extending perpendicularly from the second lower side of the second pin rail, each pin in the third pin
row displaced at least a third distance from the second inner side of the second pin rail; and

a plurality of windings located on the bobbin body between the first and second pin rails.

US Pat. No. 9,237,617

LED DRIVER WITH INHERENT CURRENT LIMITING AND SOFT STARTUP CAPABILITY

Universal Lighting Techno...

1. A lighting device comprising:
an input having first and second terminals connectable to an AC power source;
a controllable switch module coupled to the first AC power source input terminal, the controllable switch module configured
to conduct power in association with a detected zero voltage state for power received from the AC power source, and to disable
conduction in association with a detected zero current state;

a capacitor coupled to the output for the controllable switch module and defining a maximum peak output current for the device;
and

a rectifier circuit having a first input coupled to the capacitor and a second input coupled to the second AC power source
input terminal, and first and second outputs, the rectifier circuit configured to rectify AC input power received thereby
into DC output power across the first and second rectifier outputs.

US Pat. No. 9,237,621

CURRENT CONTROL CIRCUIT AND METHOD FOR FLOATING IC DRIVEN BUCK-BOOST CONVERTER

Universal Lighting Techno...

1. An LED driver circuit comprising:
first and second DC input terminals, the second DC input terminal coupled to a first circuit ground;
a PFC switching circuit block comprising a PFC controller and a switching element coupled on a first end to the first DC input
terminal and on a second end to a second circuit ground;

an output circuit block comprising
a buck-boost inductor coupled on a first end to the first circuit ground and on a second end to the second circuit ground,
and

a first current sensor coupled on a first end to the second circuit ground; and
a dimming control circuit block comprising a second current sensor coupled between a second end of the first current sensor
and a feedback input terminal on the PFC controller, the dimming control circuit block further coupled to the second circuit
ground.

US Pat. No. 9,629,206

REDUCING OUTPUT RIPPLE CURRENT AND PROTECTING INVERTER SWITCHES DURING NON-ZERO VOLTAGE SWITCHING FOR ISOLATED BUCK CONVERTERS

UNIVERSAL LIGHTING TECHNO...

1. An isolated buck converter operable to receive a direct current (DC) voltage from a power source and provide a substantially
DC output voltage to a load, said isolated buck converter comprising:
a high switch connected to the power source;
a low switch connected to the high switch and a ground of the power source, the connection between the high switch and the
low switch forming a first junction;

a high bulk capacitor connected to the power source;
a low bulk capacitor connected to the high bulk capacitor and to the ground of the power source, the connection between the
high bulk capacitor and the low bulk capacitor forming a second junction;

an isolating transformer having a primary winding and a secondary winding, wherein the primary winding is connected between
the first junction and the second junction;

a rectifier connected to the secondary winding of the isolating transformer;
an output inductor connected to an output of the rectifier, wherein the output inductor is configured to provide the DC output
voltage to the load; and

a switch controller connected to the high switch and to the low switch, wherein said switch controller is configured to
control the high switch and the low switch via pulse width modulation, and
increase a frequency of the pulse width modulation as a current from the output inductor to the load decreases to operate
the output inductor in a continuous current mode.

US Pat. No. 9,435,527

THERMAL VENTING APPARATUS AND METHOD FOR LED MODULES

Universal Lighting Techno...

1. A light emitting apparatus comprising:
a substrate;
a light emitter mounted on the substrate;
a lens at least partially covering the light emitter, the lens defining a space about the light emitter;
a heat sink attached to the substrate, the heat sink configured to dissipate heat from the light emitter via the substrate;
an opening in the substrate, the opening communicated with the space; and
a vent passage at least partially defined between the heat sink and the substrate, the vent passage communicating the opening
in the substrate with an exterior of the heat sink.

US Pat. No. 9,577,540

MULTI-STAGE FLYBACK CONVERTER FOR WIDE INPUT VOLTAGE RANGE APPLICATIONS

UNIVERSAL LIGHTING TECHNO...

1. A DC-DC power converter circuit comprising:
an intermediate circuit comprising first and second capacitors coupled in series across first and second DC input terminals
and defining a midpoint;

a flyback transformer having a first primary winding coupled on a first end to the first DC input terminal, a second primary
winding coupled on a first end to the midpoint, and a secondary winding;

a first switching element coupled between a second end of the first primary winding and the midpoint;
a second switching element coupled between a second end of the second primary winding and the second DC input terminal;
the secondary winding of the flyback transformer is configured for coupling to a DC load; and
control circuitry is coupled to the first and second switching elements and effective to turn the first and second switching
elements on and off synchronously, wherein a voltage across the first capacitor is substantially equal to a voltage across
the second capacitor, further wherein a voltage stress across the first and second switching elements is substantially equal.

US Pat. No. 9,459,396

LINEAR INDIRECT LED LIGHTING SYSTEM

Universal Lighting Techno...

1. An edge-lit lighting apparatus comprising:
a light source; and
a light guide body comprising
an input edge defined by at least a first boundary and a second boundary, the light source positioned to project light through
the input edge between the first and second boundaries in a primary emission direction, the light guide body extending from
the first and second boundaries of the input edge in elongation directions that vary with distance of the light guide body
from the input edge, the elongation directions having an average elongation direction that defines a mean elongation plane
angularly offset from the primary emission direction;

a reflective side adjacent the input edge at the first boundary, the reflective side extending from the first boundary of
the input edge to a distal end of the light guide body, the reflective side having a curvilinear profile configured to receive
and redirect light from the light source;

an output side adjacent the input edge at the second boundary, the output side extending from the second boundary of the input
edge to the distal end of the light guide body, the output side having an output portion configured to disperse redirected
light from the reflective side: and

a camber line extending from the input edge to the distal end, the camber line equidistant from the reflective side and the
output side, the camber line tangent to the mean elongation plane.

US Pat. No. 9,307,623

METHOD TO CONTROL STRIATIONS IN A LAMP POWERED BY AN ELECTRONIC BALLAST

Universal Lighting Techno...

1. A driver circuit configured to provide power to a load from a power source, the driver circuit comprising:
a controller configured to provide an upper switch drive signal and a lower switch drive signal, wherein an on-time of the
upper switch drive signal is less than an on-time of the lower switch drive signal;

a half-bridge inverter coupled to the controller and configured to provide an output signal as a function of the upper drive
switch signal and the lower drive switch signal; and

a resonant tank circuit coupled to the half-bridge inverter and configured to receive the output signal from the half-bridge
inverter and provide power to the load as a function of the received output signal; and

wherein the controller comprises
a signal generator configured to provide a frequency modulated signal having a duty cycle of 50% or less, wherein the frequency
is modulated as a function of an output current or output voltage provided to the load,

a delay circuit coupled to the signal generator and configured to receive the frequency modulated signal, and delay a turn
on-time of the frequency modulated signal to generate a delayed frequency modulated signal, and

a half-bridge driver coupled to the delay circuit and configured to receive the delayed frequency modulated signal and provide
the upper switch drive signal and the lower switch drive signal as a function of the delayed frequency modulated signal,

the half-bridge driver further comprising:
a first dead time delay configured to delay a turn on-time of the upper switch drive signal from a turn on-time of the delayed
frequency modulated signal,

a NOT gate configured to receive the delayed frequency modulated signal and invert the delayed frequency modulated signal
to generate an inverted delayed frequency modulated signal, and

a second dead time delay configured to delay a turn on-time of the lower switch drive signal from a turn on-time of the inverted
delayed frequency modulated signal.

US Pat. No. 9,401,237

CORE PASSAGE STEP APPARATUS AND METHODS

Universal Lighting Techno...

1. A magnetic component apparatus comprising:
a bobbin body having a first end and a second end;
a core passage defined axially through the bobbin body from the first end to the second end;
the bobbin body including a passage floor substantially facing toward the core passage, the passage floor defining a plane,
the passage floor extending outward from the first and second ends of the bobbin body in the plane such that portions of the
floor are outside the core passage;

a first passage wall extending upwardly from the passage floor substantially facing toward the core passage; and
a first step disposed on the bobbin body at the intersection of the passage floor and the first passage wall, the first step
terminating at the first end and at the second end of the bobbin body such that no portion of the first step extends out of
the core passage;

a core leg disposed in the core passage, the core leg resting on the first step, the core leg defining a gap between the core
leg and the passage floor; and

a thermal transfer potting material disposed in the gap in thermal contact with the core leg to transfer heat from the core
leg.

US Pat. No. 9,237,625

DRIVER CIRCUIT WITH A COMMON INTERFACE FOR NEGATIVE TEMPERATURE COEFFICIENT RESISTOR AND BI-METALLIC STRIP TEMPERATURE SENSING

Universal Lighting Techno...

1. A constant current driver circuit comprising:
a current source tank circuit configured to receive power from a power source and provide an output current to a light source
of a light engine as a function of a control signal;

a temperature sensing circuit operable to
connect to a temperature sensor of the light engine, wherein the temperature sensor is one of a thermistor or a bi-metal switch,
and

provide a temperature signal indicative of a resistance of the temperature sensor; and
a controller connected to the current source tank circuit, the temperature sensing circuit, and a ground, wherein the controller
is operable to

provide the control signal to the current source tank circuit,
receive the temperature signal from the temperature sensing circuit at a temperature signal input of the controller, and
adjust the provided control signal as a function of the received temperature signal.

US Pat. No. 9,203,321

NON-ISOLATED RESONANT DC-DC CONVERTER WITH BOOST-TYPE VOLTAGE DOUBLER OUTPUT

Universal Lighting Techno...

1. A driver circuit for providing power from a power source to a load, said driver circuit comprising:
an inverter having a control input, a power input, and an inverter output, wherein:
the power input is configured to connect a direct current (DC) power rail; and
the inverter is configured to provide an alternating current (AC) output signal as a function of a drive signal received at
the control input of the inverter;

a voltage doubler output stage having a voltage doubler input and a voltage doubler output, wherein:
the voltage doubler output is configured to connect to the load;
the voltage doubler input is coupled to the inverter output;
the voltage doubler output stage is configured to convert the AC output signal from the inverter into a DC output signal;
and

the voltage doubler output stage comprises
a first diode having an anode and a cathode,
a second diode having an anode and a cathode,
a charge capacitor having a first terminal coupled to the voltage doubler input and a second terminal coupled to the cathode
of the second diode,

a boost inductor having a first terminal connected to the cathode of the second diode and to the second terminal of the charge
capacitor, and a second terminal connected to the anode of the first diode, and

wherein the cathode of the first diode is coupled to the voltage doubler output.

US Pat. No. 9,583,852

PCB HOLDER HAVING A LEG WITH A PASSAGEWAY WITH A CONDUCTIVE PIN THEREIN TO ELECTRICALLY CONNECT TWO PCBS

UNIVERSAL LIGHTING TECHNO...

1. A horizontal printed circuit board (PCB) holder for connection to a first PCB and a second PCB, the PCB holder comprising:
a frame having one or more legs extending outwardly from the frame, each of the one or more legs comprising a passageway therein;
and

at least one conductive pin fixedly secured within the passageway of at least one of the one or more legs,
wherein the at least one conductive pin is configured to convey electrical signals between the first PCB and the second PCB
when both of the first PCB and second PCB are connected to the PCB holder.

US Pat. No. 9,234,650

ASYMMETRIC AREA LIGHTING LENS

Universal Lighting Techno...

1. An optical lens apparatus for distributing light from a light emitter, comprising:
a lens body having an input side and an output side, the input side of the lens body positionable to receive light from the
light emitter, the light from the light emitter including at least first and second portions of light, the first portion of
light initially directed into a first region of the lens body and the second portion of light initially directed into a second
region of the lens body, the first region and the second region separated by a transverse reference plane passing through
the light emitter;

a refractive output surface positioned on the output side of the first region of the lens body, the refractive output surface
refracting the first portion of the light from the light emitter to direct and the first portion of the light to a desired
illumination region; and

a light redirecting fin positioned on the output side of the second region of the lens body, the light redirecting fin having
a proximal end and a distal end, the distal end positioned farther from the input side of the lens body than the distal end,
the light redirecting fin including a total internal reflection surface extending from the proximal end to the distal end
of the light redirecting fin and spaced apart from the transverse reference plane, the light redirecting fin including a refracting
surface, the refracting surface of the light redirecting fin extending at an acute angle from the distal end of the total
internal reflection surface to an intersection with the transverse reference plane, the total internal reflection surface
reflecting the second portion of the light from the light emitter to direct the second portion of the light toward the desired
illumination region, at least a portion of the second portion of light reflected by the internal reflection surface passing
through the second refracting surface of the light directing fin wherein the total internal reflection surface of the light
redirecting fin is positioned at varying distances from the transverse reference plane such that a proximal portion of the
total internal reflection surface is farther from the reference plane than a distal portion of the total internal reflecting
surface; the total internal reflection surface comprises a plurality of planar longitudinal faces, each face having a proximal
edge and a distal edge, each respective distal edge of a longitudinal face closer to the transverse reference plane than the
respective proximal edge of the longitudinal face.

US Pat. No. 9,648,678

LED DRIVER CIRCUIT WITH DIMMING CONTROL AND PROGRAMMING INTERFACES

UNIVERSAL LIGHTING TECHNO...

1. An LED driver circuit permitting dynamic operation range control for powering an LED array, the LED driver comprising:
a power converter configured to generate an output voltage and an output current for driving the LED array;
a dimming interface circuit configured to generate a dimming control signal based on an input received across first and second
dimming input terminals;

a tuning interface circuit configured to removably couple to the first and second dimming input terminals and to provide a
programming signal associated with at least one of the output voltage and the output current;

a controller configured to regulate the output voltage and the output current generated by the power converter, based on the
dimming control signal, a sensed output from the power converter, and at least one of a programmed maximum output voltage
and a maximum output current value associated with the power converter, the dimming interface circuit, and the tuning interface
circuit; and

a tuning interface sensing circuit, the tuning interface sensing circuit comprising
first and second capacitors coupled in series between the first dimming input terminal and a circuit ground, and
a switching element having its gate electrode coupled to a node between the first and second capacitors, wherein a tuning
input voltage corresponding to a high (1) digital pulse received via the tuning interface circuit is configured to charge
the second capacitor and to turn on the switching element.

US Pat. No. 9,668,309

LED DRIVER PROVIDING CONSTANT OUTPUT POWER ACROSS A WIDE OUTPUT VOLTAGE AND CURRENT RANGE

Universal Lighting Techno...

1. An LED driver comprising:
first and second switching elements coupled in series across a DC power input source;
a first resonant inductive element coupled on a first end to a first node between the first and second switching elements;
first and second voltage clamping elements coupled in series across the DC power input source, wherein a second end of the
first resonant inductive element is coupled to a second node between the first and second voltage clamping elements;

a second resonant inductive element and a resonant energy storage device coupled in series between the second node and a power
input source ground terminal; and

a primary winding of an output transformer coupled in parallel with the energy storage device, wherein the LED driver further
comprising a rectifier circuit coupled across a secondary winding of the output transformer; an output energy storage device
coupled across the rectifier circuit; and first and second output terminals configured to provide an output voltage from the
rectifier circuit and the output energy storage device to one or more LEDs coupled thereto.

US Pat. No. 9,807,830

LED DRIVER CIRCUIT WITH STEP CONFIGURABLE OUTPUT

UNIVERSAL LIGHTING TECHNO...

1. An LED driver comprising:
an input power converter coupled to a DC input and configured to generate AC power at an output of the power converter;
a resonant circuit comprising a primary winding of a power transformer coupled to the output of the power converter;
a secondary winding of the power transformer coupled on a first end to a first output rectifier branch;
a plurality of circuit branches coupled in parallel on their respective first ends to a second output rectifier branch, and
on their respective second ends to a corresponding plurality of taps on the secondary winding of the power transformer,

each of the circuit branches comprising a switching element user-selectably driven between an open and closed state, wherein
a closed one of the plurality of switching elements defines a number of turns between the first end and a second end of the
secondary winding corresponding to the respective tap, and

wherein an output current through the first and second output rectifier branches is defined according to one or more of the
switching elements in the circuit branches being closed.

US Pat. No. 9,805,859

MAGNETIC COMPONENT WITH ELEVATED BOBBIN

UNIVERSAL LIGHTING TECHNO...

1. A magnetic device for an electronic circuit comprising:
a bobbin comprising
a bobbin body having an axial passage,
a first pin rail and a second pin rail, each pin rail having a respective upper surface facing toward the axial passage of
the bobbin body, the first pin rail spaced apart from the second pin rail by a pin rail spacing distance,

a first spacing member positioned between the bobbin body and the upper surface of the first pin rail,
a second spacing member positioned between the bobbin body and the upper surface of the second pin rail, and
a winding disposed around the bobbin body;
a printed circuit board having an upper surface positioned below the first and second pin rails; and
a core having a core leg extending into the axial passage in the bobbin body, the core having a lower surface facing the upper
surfaces of the first and second pin rails, the lower surface of the core being offset from the first and second pin rails
by a first core offset distance, the lower surface of the core being offset from the upper surface of the printed circuit
board by a second core offset distance, the second core offset distance being at least seventy-five percent of the pin rail
spacing distance.

US Pat. No. 9,787,195

PRIMARY CURRENT SENSING METHOD FOR ISOLATED LED DRIVER

Universal Lighting Techno...

1. A system for controlling the current through a DC load, the system comprising:
a DC-to-AC inverter configured to generate a primary AC voltage to a primary winding of an isolation transformer, the primary
AC voltage having a nominal frequency, the primary winding having a magnetizing inductance, wherein

the DC-to-AC inverter includes a switch controller configured to control the frequency of the primary AC voltage; and
the switch controller is configured to receive a reference signal having a value corresponding to a desired sensed primary
current through the primary winding;

a rectifier circuit connected to a secondary winding of the isolation transformer to receive a secondary AC voltage responsive
to the primary AC voltage, the rectifier circuit configured to rectify the secondary AC voltage to provide a DC voltage to
a load to cause a load current to flow through the load;

a capacitor connected across the primary winding of the isolation transformer in parallel with the magnetizing inductance
of the primary winding to form a parallel inductance-capacitance (L-C) combination, the capacitor having a capacitance selected
such that the parallel L-C combination resonates at a frequency near the nominal frequency; and

a current sensor electrically coupled to the primary winding of the isolation transformer and configured to sense a sensed
current responsive to the primary current through the primary winding, the primary current through the primary winding responsive
to the load current through the DC load, the current sensor configured to provide a feedback signal responsive to the sensed
current, the feedback signal provided to the DC-to-AC inverter, the DC-to-AC inverter responsive to the feedback signal to
adjust the operating frequency to produce a desired sensed current through the current sensor and thereby to produce a desired
load current through the DC load, wherein:

the switch controller is further configured to compare the value of the reference signal with an internal signal responsive
to the feedback value;

the switch controller is configured to adjust the frequency of the primary AC voltage to reduce any difference between the
internal signal and the value of the reference signal;

the feedback signal comprises a sinusoidal signal having a non-zero value during approximately half of an AC cycle of the
primary AC voltage; and

the internal signal responsive to the feedback signal is an average of the sinusoidal signal over the AC cycle of the primary
AC voltage.

US Pat. No. 9,618,164

ADAPTER FOR RETROFITTING LED LAMPS, METHOD OF USE, AND LIGHTING FIXTURE WITH RETROFIT ADAPTER

Universal Lighting Techno...

20. A lighting fixture for retrofitting a light emitting diode (LED) lamp, the lighting fixture comprising:
a fixture body having opposing ends;
a plurality of sockets having distal and proximal sides, the plurality of sockets being attached at the opposing ends of the
fixture body, the plurality of sockets being configured to receive an LED lamp and to form electrical and mechanical connections
with the LED lamp;

at least one adapter, the at least one adapter comprising
a pin plate having distal and proximal sides, the pin plate comprising at least one pin extending outwardly from the distal
side of the pin plate; and

a retaining ring comprising a base, at least one arm, and at least one projecting member, each of the base, the at least one
arm, and the at least one projecting member having an inward and an outward surface, wherein

the at least one pin is configured to restrict movement of the at least one adapter when the at least one adapter is rotated
to a restraining position,

the at least one arm extends outwardly from the inward surface of the base, and
the at least one projecting member extends from the inward surface of the at least one arm and is configured to cause the
inward surface of the at least one projecting member to face the inward surface of the base, wherein the at least one projecting
member is configured to restrict movement of the at least one adapter in a direction corresponding to an axis of rotation
of the at least one adapter.

US Pat. No. 9,801,262

CONDUIT KNOCKOUT INTERFACE DEVICE FOR CONNECTING A POWER OVER ETHERNET CABLE TO AN LED LUMINAIRE

Universal Lighting Techno...

1. A power over Ethernet (PoE) interface device for use with a luminaire having a conduit knockout opening defined in the
luminaire, the PoE interface device comprising:
a knockout adapter configured to be mounted to the luminaire at the conduit knockout opening;
a power assembly connected to the knockout adapter, the power assembly including
an input section having a data connector, the data connector configured to couple to a data cable and further configured to
receive PoE signals from the data cable, and

an output section having power output terminals, the power output terminals electrically connected to the data connector and
configured to electrically communicate the PoE signals from the data connector to an LED light source in the luminaire;

wherein the power assembly is configured to pass through the conduit knockout opening defined in the luminaire; and
wherein the power assembly is further configured to be positioned inside the luminaire when the knockout adapter is mounted
to the luminaire.

US Pat. No. 9,913,354

UNPOWERED TUNING INTERFACE CIRCUIT FOR AN LED DRIVER

UNIVERSAL LIGHTING TECHNO...

1. An LED driver circuit configured to be tuned via an unpowered tuning process, the LED driver circuit comprising:
a radio frequency (RF) coupling circuit configured to receive an RF tuning signal having a plurality of bursts of RF energy,
each burst including a plurality of cycles of an RF carrier, the RF coupling circuit configured to output a coupled RF tuning
signal;

a direct current (DC) generator circuit having a bridge rectifier configured to rectify the coupled RF tuning signal and to
output a rectified RF tuning voltage;

an RF demodulation circuit having an input and an output, the RF demodulation circuit configured to receive the rectified
RF tuning voltage at the input and to selectively convert each burst of the rectified RF tuning voltage to a single DC pulse
at the output, the RF demodulation circuit including a transistor having a collector connected to the input and having an
emitter connected to the output, the transistor having a base connected to the input via an input resistor, the base further
connected to a Zener diode configured to limit the base voltage and to thereby limit the emitted voltage on the output;

a voltage regulator configured to receive the rectified RF tuning voltage and to output a regulated voltage; and
a microcontroller configured to receive the output of the RF demodulation circuit, to receive the regulated voltage and to
control one or more tuning operations of the LED driver circuit.

US Pat. No. 9,719,662

THIN-FORM LENS FOR VOLUME LIGHTING APPLICATIONS

Universal Lighting Techno...

1. A lens for redirecting light from a light source positioned in a plane and along a centerline, the centerline normal to
the plane, the lens comprising:
a reflecting portion having an inner surface and an outer surface, wherein:
the inner surface comprises a plurality of stepped refracting surfaces parallel to the plane, the plurality of refracting
surfaces including at least a first refracting surface and a last refracting surface, the first refracting surface extending
from the centerline at a first distance from the plane, each subsequent refracting surface positioned farther from the centerline
and farther from the plane; and

the outer surface comprises at least one curved segment, the at least one curved segment having a first end at the centerline
at a selected first lens thickness from the first step and having a second end positioned farther from the centerline and
farther from the plane than the first end, the second end of the curved segment spaced apart from the last refracting surface
of the inner surface by a second lens thickness, the outer surface having at least one curvature selected such that light
from the light source incident on the inner surface is refracted by the inner surface and is totally internally reflected
by the outer surface;

and
a refracting portion having an inner surface and an outer surface, the refracting portion extending from the reflecting portion
in a first direction away from the centerline and in a second direction toward the plane with the inner surface facing toward
the centerline.

US Pat. No. 9,693,404

NEGATIVE CURRENT SENSING METHOD FOR MULTI-CHANNEL LED DRIVER

Universal Lighting Techno...

1. A multi-channel power supply comprising:
first and second power converters configured to drive respective first and second lighting sources, each of the first and
second power converters respectively comprising

a first stage configured to provide current through a primary winding of an isolation transformer;
a second stage having
an energy storage device coupled in parallel with a secondary winding of the isolation transformer,
a current sensing resistor coupled on a first end to the secondary winding and on a second end to a circuit ground for the
second stage, and

a filtering circuit coupled on a first end to a node between the secondary winding and the current sensing resistor, and on
a second end to the circuit ground; and

a feedback circuit coupled between the first stage and the filtering circuit, and configured to deliver a control signal to
the first stage corresponding to a current through the secondary winding.

US Pat. No. 9,723,667

OUTPUT TUNING AND DIMMING INTERFACE FOR AN LED DRIVER

Universal Lighting Techno...

1. An LED driver circuit for group tuning one or more power parameters of the LED driver circuit with one or more other LED
driver circuits by a programming device via a shared bus, the LED driver circuit comprising:
a power converter configured to generate an output voltage and an output current for driving an LED array;
a dimming interface circuit configured to generate a dimming control signal based on an input received across first and second
dimming interface input terminals during an online mode of operation;

a tuning interface circuit coupled to the first and second dimming interface input terminals during an offline mode of operation,
wherein the LED driver circuit is configured to receive both programming signals and power from the programming device via
the tuning interface circuit when operating in the offline mode of operation;

a controller configured (i) during the online mode of operation to regulate the output voltage and the output current generated
by the power converter, and (ii) during the offline mode of operation to receive at least one of the programming signals and
power from the programming device.

US Pat. No. 9,644,833

ENCAPSULATED LED LIGHTING MODULE WITH INTEGRAL GAS VENTING

UNIVERSAL LIGHTING TECHNO...

1. A lighting apparatus comprising:
a substrate;
a light source electrically connected to the substrate;
a lens positioned over the light source, the lens at least partially defining a space about the light source;
a frame connected to the substrate, the frame including a vent hole, the vent hole communicated with an exterior of the lighting
apparatus;

a vent channel at least partially defined between the lens and the substrate, the vent channel communicating the space about
the light source with the vent hole in the frame; and

an encapsulant at least partially covering the substrate and at least partially covering the lens, the encapsulant defining
a seal between the substrate and the lens.

US Pat. No. 9,721,716

MAGNETIC COMPONENT HAVING A CORE STRUCTURE WITH CURVED OPENINGS

Universal Lighting Techno...

1. An electric coil device comprising:
A modified E-core structure for a magnetic component comprising a unitary solid structure of a ferromagnetic material, the
unitary solid structure comprising:

a core body comprising:
a first arcuate portion having a respective first end and a respective second end, the first arcuate portion comprising a
first arcuate inner surface and a first arcuate outer surface, the outer surface of the first arcuate portion having a first
constant outer radius of curvature between the first end and the second end of the first arcuate portion;

a second arcuate portion having a respective first end and a respective second end, the second end of the second arcuate portion
adjacent the second end of the first arcuate portion, the second arcuate portion comprising a second arcuate inner surface
and a second arcuate outer surface, the outer surface of the second arcuate portion having a second constant outer radius
of curvature between the first end and the second end of the second arcuate portion; and

a filler bridge disposed between the first arcuate outer surface and the second arcuate outer surface near the respective
second ends of the first arcuate portion and the second arcuate portion of the core body, the filler bridge interconnecting
the first arcuate portion and the second arcuate portion with magnetically permeable material, the filler bridge including
a filler bridge surface facing away from the middle core leg;

a first outer leg protruding away from the first end of the first arcuate portion of the core body, the first outer leg having
a respective outer surface and a respective inner surface;

a second outer leg protruding away from the first end of the second arcuate portion of the core body, the second outer leg
having a respective inner surface and a respective outer surface, the second outer core leg parallel to the first outer core
leg;

a middle core leg extending from the second ends of the first and second arcuate portions of the core body, the middle leg
positioned between the respective inner surfaces of the first and second outer core legs and parallel to the first and second
outer core legs, the middle core leg having a first surface facing the inner surface of the first outer leg and having a second
surface facing the inner surface of the second outer leg;

wherein a first U-shaped channel is defined in the unitary core structure between the inner surface of the first outer core
leg, the first surface of the middle core leg, and the first arcuate inner surface; and

wherein a second U-shaped channel is defined in the unitary core structure between the inner surface of the second outer core
leg, the second surface of the middle core leg, and the second arcuate inner surface.

US Pat. No. 9,974,147

INTEGRATED LED DRIVER FOR WIRELESS COMMUNICATION

UNIVERSAL LIGHTING TECHNO...

1. An LED lighting device comprising:first and second input terminals configured to receive input power from an LED driver when coupled thereto;
one or more light emitting diodes (LEDs) coupled in series across the first and second input terminals and configured to generate a lighting output corresponding to the input power;
a wireless communication module coupled to the first and second input terminals to receive input power therefrom, the wireless communication module comprising
a transceiver configured to send and receive wireless communication signals with respect to an external device, and
a controller linked to the transceiver and configured to generate lighting output control signals; and
first and second output terminals configured to transmit the lighting output control signals to the LED driver when coupled thereto.

US Pat. No. 9,683,717

ASYMMETRIC AREA LENS FOR LOW-PROFILE LIGHTING SYSTEM

UNIVERSAL LIGHTING TECHNO...

1. A low-profile lighting apparatus, the lighting apparatus comprising:
at least one light-emitting diode (LED);
a primary optical lens positioned with respect to the LED, the primary optical lens comprising at least one lobe defined with
respect to a lens reference plane, with respect to a lens center point in the lens reference plane, and with respect to a
lens optical axis orthogonal to the lens reference plane and passing through the lens center point, the at least one lobe
comprising:

a primary lens input surface displaced from the lens center point to receive light emitted by the LED, the primary lens input
surface having a semicircular profile defined with respect to the lens center point; and

a primary lens output surface displaced from the primary lens input surface to define a primary lens body between the input
surface and the output surface, the primary lens output surface having a cross-sectional profile defined with respect to the
lens reference plane and the lens optical axis, the cross-sectional profile of the output surface comprising:

at least a first curve segment angularly closest to the lens reference line, the first curve segment having a first slope
that slopes away from the lens reference line and away from the lens optical axis;

at least a second curve segment which is angularly farther from the lens reference line than the first curve segment, the
second curve segment having a second slope that slopes away from the lens reference line, the second slope steeper than the
first slope;

at least a third curve segment which is angularly farther from the lens reference line than the second curve segment, the
third curve segment having a third slope that is less steep than the second slope, the third curve segment having a third
slope that slopes away from the lens reference line and toward the lens optical axis;

a first plurality of additional curve segments which are progressively angularly farther from the lens reference line than
the third curve segment, each of the first plurality of additional curve segments sloping away from the lens reference line
and sloping toward the lens optical axis, with each successive curve segment having a slope that is less steep than the immediately
preceding curve segment;

a second plurality of additional curve segments which are progressively angularly farther from the lens reference line than
the first plurality of additional curve segments, the second plurality of additional line segments sloping toward the lens
reference line and sloping towards the lens optical axis, with each successive curve segment in the second plurality of additional
curve segments having a steeper slope than the immediately preceding curve segment.

US Pat. No. 9,980,396

LOW PROFILE MAGNETIC COMPONENT APPARATUS AND METHODS

UNIVERSAL LIGHTING TECHNO...

1. A magnetic component apparatus for an electronic circuit, comprising:a core having a core body and a core leg protruding from the core body;
the core body defining a core body height;
the core leg defining a core leg height, the core leg height being less than the core body height; and
a conductive winding positioned about the core leg, the conductive winding defining a winding height, the conductive winding also defining a winding height offset ratio equal to the winding height divided by the core body height, the winding height offset ratio being less than about 1.1,
wherein the winding height offset ratio being between about 1.0 and about 0.5.

US Pat. No. 9,974,129

CIRCUIT AND METHOD FOR LED CURRENT REGULATION AND RIPPLE CONTROL

UNIVERSAL LIGHTING TECHNO...

1. A circuit for providing a load current to a load comprising:a driver circuit having an isolation transformer that includes a primary winding and a secondary winding, the driver circuit comprising a flyback converter controller that is configured to selectively apply a pulsing DC voltage to the primary winding to generate a current in the secondary winding, the secondary winding coupled to a diode configured to provide a rectified secondary current to charge a secondary filter capacitor, the secondary filter capacitor connected between a first output terminal and a second output terminal, the driver circuit including a sensing resistor in series with the primary winding of the isolation transformer, the sensing resistor configured to generate a primary sensed voltage responsive to the rectified secondary current, the flyback converter controller configured to respond to the magnitude of the primary sensed voltage to control the magnitude of the rectified secondary current to maintain the magnitude of the rectified secondary current within a first range of magnitudes between a first lower magnitude and a first upper magnitude, a difference between the first upper magnitude and the first lower magnitude being a first magnitude difference;
a secondary sensing resistor having a first resistor terminal connected to the first output terminal and having a second resistor terminal connectable to a load, the second output terminal connectable to the load, the secondary sensing resistor configured to generate a secondary sensed voltage proportional to the load current flowing through the secondary sensing resistor; and
a current regulator connected between the first and the second output terminals, the current regulator including a reference voltage, the current regulator configured to receive the secondary sensed voltage from the secondary sensing resistor and to selectively enable a shunt current to pass through the current regulator when the secondary sensed voltage exceeds the reference voltage to divert a portion of the rectified current from the load, the current regulator configured to control the current through the secondary sensing resistor to a controlled current magnitude that varies within a second range of magnitudes between a second lower magnitude and a second upper magnitude, a difference between the second upper magnitude and the second lower magnitude being a second magnitude difference, the second magnitude difference as a percentage of the second lower magnitude less than the first magnitude difference as a percentage of the first lower magnitude.

US Pat. No. 9,689,554

ASYMMETRIC AREA LIGHTING LENS

Universal Lighting Techno...

1. An optical lens apparatus for distributing light from a light emitter, comprising:
a lens body having an input side and an output side, the input side of the lens body positionable to receive light from the
light emitter, the light from the light emitter including at least first and second portions of light, the first portion of
light initially directed into a first region of the lens body and the second portion of light initially directed into a second
region of the lens body;

a first refractive output surface positioned on the output side of the first region of the lens body, the first refractive
output surface refracting the first portion of the light from the light emitter to direct the first portion of the light to
a desired illumination region; and
a total internal reflection surface positioned on the output side of the second region of the lens body, the total internal
reflection surface reflecting the second portion of the light from the light emitter;
a second refractive output surface positioned on the output side of the second region of the lens body, the second refractive
surface comprising a plurality of refractive elements, the refractive elements of the second refractive surface receiving
the second portion of light reflected by the total internal reflection surface and refracting the second portion of light
to the desired illumination region;

wherein the plurality of refractive elements comprise a plurality of spaced apart arcuate convex elements with a respective
concave element positioned between adjacent arcuate convex elements; and

wherein the plurality of refractive elements comprise seven convex refractive elements and six concave refractive elements,
and the convex refractive elements have a total arc length that is approximately 5.4 times a total arc length of the concave
refractive elements.

US Pat. No. 10,045,451

LIGHTING CONTROL SYSTEM, EXPANSION PACK, AND METHOD OF USE

Universal Lighting Techno...

1. A lighting control system, comprising:an expansion pack;
a main lighting controller comprising
at least one electrical relay,
a main connector having an opening permitting access to an interior portion of the main lighting controller, and
a main coupler directly connected to the expansion pack;
the expansion pack comprising
at least one electrical relay,
an expansion connector having an opening permitting access to an interior portion of the expansion pack, and
an expansion coupler directly connected to the main lighting controller;
at least two junction boxes each comprising at least one configurable opening adapted to permit access to an interior portion of the junction box, a first of the at least two junction boxes directly connected to the main lighting controller and a second of the at least two junction boxes directly connected to the expansion pack;
wherein a location of the main connector and a location of the expansion connector form a predetermined distance therebetween when the main lighting controller and the expansion pack are connected via the main coupler and the expansion coupler, and
wherein the at least one configurable opening of each of the first of the at least two junction boxes and the second of the at least two junction boxes corresponds to the predetermined distance.

US Pat. No. 9,788,430

STACKED MAGNETIC ASSEMBLY

Universal Lighting Techno...

1. A magnetic device for an electronic circuit comprising:
a printed circuit board;
a first magnetic component assembly electrically connected to the printed circuit board, wherein the first magnetic component
assembly comprises

a first bobbin, wherein the first bobbin includes a first bobbin first retention flange and a first bobbin second retention
flange,

a first core extending through the first bobbin, and
a first winding disposed around the first bobbin, the first winding positioned between the first bobbin first retention flange
and the first bobbin second retention flange;

and
a second magnetic component assembly electrically connected to the printed circuit board, the second magnetic component assembly
stacked on the first magnetic component assembly, wherein the second magnetic component assembly comprises

a second bobbin,
a second core extending through the second bobbin, and
a second winding disposed around the second bobbin;
wherein the second bobbin of the second magnetic component assembly is positioned on the first bobbin of the first magnetic
component assembly with the second bobbin positioned on the first bobbin first retention flange and the first bobbin second
retention flange.

US Pat. No. 9,894,718

CONSTANT CURRENT SOURCE LED DRIVER CIRCUIT WITH SELF-CLAMPED OUTPUT

UNIVERSAL LIGHTING TECHNO...

1. A driver circuit operable to provide current to a light source from a direct current (DC) power source having a power rail
and a ground, the driver circuit comprising:
a power converter having an input and an output, wherein the input is configured to connect to the power rail and to the ground
of the DC power source and provide an alternating current (AC) signal at the output;

an output tank circuit comprising a first capacitive element and a primary winding of an inductive element coupled in series
between the output of the power converter and the ground;

wherein the inductive element provides a resonant inductance and is further configured to distribute power output from the
tank circuit to at least first, second and third secondary windings of the inductive element;

a clamping circuit comprising
a first clamping diode having an anode connected to the ground,
a second clamping diode having a cathode connected to the power rail of the DC power source and an anode connected to a cathode
of the first clamping diode, and

a DC blocking capacitor and the first secondary winding of the inductive element coupled in series between the ground and
the anode of the second clamping diode;

an output rectifier having first and second inputs connected respectively to the second and third secondary windings of the
inductive element and an output operable to connect to the light source; and

a second capacitive element coupled on a first end to a node between the second secondary winding and the first rectifier
input, and on a second end to a node between the third secondary winding and the second rectifier input,

wherein the second capacitive element provides a resonant capacitance for the tank circuit corresponding to a turns ratio
between the primary winding and the first secondary winding of the inductive element.

US Pat. No. 9,693,411

LED DRIVER CONFIGURATION AND DIMMING INTERFACE FOR DYNAMIC ADJUSTMENT OF DRIVER OPERATING PARAMETERS

Universal Lighting Techno...

1. An LED driver circuit having first and second dimming interface input terminals, the LED driver circuit comprising:
a power converter configured to generate an output voltage and an output current for driving an LED array;
a tuning interface circuit coupled to the first and second dimming interface input terminals during an offline mode of operation,
wherein (i) the LED driver circuit is configured to receive both programming signals and power from a programming device via
the tuning interface circuit when operating in the offline mode of operation, and wherein (ii) the programming signals comprise
at least one of (a) a maximum voltage or maximum current value, and (b) one or more operating parameters associated with the
power converter;

a controller configured to receive one or more signals from the tuning interface circuit, the controller being configured
such that (i) during an online mode of operation an operating characteristic of the power converter is managed based at least
in part upon at least one of the received programming signals, and (ii) during the offline mode of operation to receive at
least one of the programming signals and power from the programming device.

US Pat. No. 9,913,335

LED DRIVER CIRCUIT WITH THREE LEVEL STEP DIMMING INTERFACE

UNIVERSAL LIGHTING TECHNO...

1. A light emitting diode (LED) driver circuit providing a direct input line sensing step dimming interface for controlling
an LED load, the LED driver circuit comprising:
a first input line coupled to an unswitched terminal of a first line switch;
a second input line coupled to an unswitched terminal of a second line switch;
a neutral line;
a diode bridge coupled to respective switched terminals of each of the first line switch and to the second line switch and
to the neutral line;

a first isolation circuit coupled between the first line switch and the diode bridge, and comprising a first line resistor,
a first sense resistor, and a first optocoupler having an LED source side and a phototransistor side, wherein the first optocoupler
is coupled between the first sense resistor and ground at the phototransistor side, and is coupled between the first line
resistor and the neutral line at the LED source side;

a second isolation circuit coupled between the second line switch and the diode bridge, and comprising a second line resistor,
a second sense resistor, and a second optocoupler having an LED source side and a phototransistor side, wherein the second
optocoupler is coupled between the second sense resistor and ground at the phototransistor side, and is coupled between the
second line resistor and the neutral line at the LED source side; and

a microcontroller having a first sense input and a second sense input,
wherein the first isolation circuit is configured to provide a first sense signal to the first sense input and the second
isolation circuit is configured to provide a second sense signal to the second sense input, and

wherein the microcontroller is configured to control an output of the LED driver circuit based at least in part upon at least
one of the first sense signal and the second sense signal.

US Pat. No. 9,820,351

CIRCUIT AND METHOD FOR ABNORMAL FAULT TESTING IN AN LED DRIVER

Universal Lighting Techno...

1. An LED driver comprising:
a DC power source;
first and second energy storage elements coupled across the DC power source;
a DC-DC converter coupled to the energy storage elements;
transient protection circuitry coupled across each of the first and second energy storage elements and configured upon sensing
a short condition across one of the first and second energy storage elements to disable the LED driver prior to failure of
the other of the first and second energy storage elements; and

a circuit interrupter coupled in series with the DC power source, wherein the transient protection circuitry is configured
to disable the LED driver by causing the circuit interrupter to open.

US Pat. No. 10,039,159

AC LED DRIVER WITH CAPACITIVE SWITCHING

Universal Lighting Techno...

1. An alternating current (AC) light emitting diode (LED) driver for providing operating power to an LED load, comprising:a first input terminal and a second input terminal, each of the first and second input terminals connectable to an AC input voltage source;
a current limiting capacitor coupled to the first input terminal;
a bridge rectifier coupled to the current limiting capacitor, the bridge rectifier having a plurality of rectifying diodes and configured to rectify an input from the AC input voltage source;
a phase angle shift unit coupled to the first input terminal and the bridge rectifier, the phase angle shift unit configured to minimize a phase angle between input line current and input voltage received via at least one of the first input terminal and the second input terminal and rectified by the bridge rectifier.

US Pat. No. 9,799,442

MAGNETIC CORE STRUCTURES FOR MAGNETIC ASSEMBLIES

Universal Lighting Techno...

1. A magnetic assembly comprising:
a bobbin comprising a first outer flange and a second outer flange, a passageway extending through the bobbin from the first
outer flange to the second outer flange, and at least one winding wound about the passageway, the bobbin further comprising
at least one crushable passageway rib protruding into the passageway and at least one crushable flange rib on each outer flange;
and

a magnetic core comprising
an inner core positioned through the passageway of the bobbin, the inner core having a first end surface proximate to the
first outer flange and having a second end surface proximate the second outer flange, the inner core positioned in frictional
engagement with the crushable passageway rib, and

an outer core having a first inner surface and a second inner surface, the outer core positioned around the bobbin with the
first inner surface in frictional engagement with the at least one crushable flange rib on the first outer flange, the first
inner surface spaced apart from the first end surface of the inner core by a first gap distance, and with the second inner
surface in frictional engagement with the at least one crushable flange rib on the second outer flange, the second inner surface
spaced apart from the second end surface of the inner core by a second gap distance.

US Pat. No. 9,991,045

BOBBIN AND CORE ASSEMBLY CONFIGURATION AND METHOD FOR E-CORE AND I-CORE COMBINATION

UNIVERSAL LIGHTING TECHNO...

1. A magnetic assembly comprising:a bobbin comprising a first end flange and a second end flange, each end flange having a respective outer surface, a passageway extending through the bobbin from the first end flange to the second end flange, the passageway having a passageway height, the passageway including a plurality of crushable passageway ribs extending longitudinally from the first end flange toward the second end flange, and at least one winding wound about the passageway, the bobbin further comprising a channel wall parallel to the outer surface of the first end flange, the channel wall having an inner surface, the inner surface of the channel wall displaced from the outer surface of the first end flange to define an I-core receiving channel between the outer surface of the first end flange and the inner surface of the channel wall, the inner surface of the channel wall having a channel wall height approximately equal to the passageway height, the I-core receiving channel having a channel width between the outer surface of the first end flange and the inner surface of the channel wall, the I-core receiving channel extending longitudinally and vertically with respect to the outer surface of the first end flange;
an E-core having a main body with an inner surface, and having a first outer leg, a second outer leg, and a middle leg extending from the inner surface of the main body, each of the first outer leg, the second outer leg and the middle leg having a respective end surface displaced away from the inner surface of the main body, the middle leg of the E-core positioned in the passageway of the bobbin with at least a portion of the middle leg in crushing frictional engagement with the passageway ribs, the inner surface of the main body positioned against the outer surface of the second end flange, the respective end surfaces of the first outer leg and the second outer leg substantially flush with the outer surface of the first end flange; and
an I-core in the form of a rectangular parallelepiped, the I-core having a first longitudinal surface and a second longitudinal surface defining a thickness of the I-core therebetween, the thickness of the I-core substantially equal to the channel width, the I-core positioned in the I-core receiving channel with the first longitudinal surface in frictional engagement with the outer surface of the first end flange and with the second longitudinal surface in frictional engagement with the inner surface of the channel wall, the frictional engagement of the first longitudinal surface with the outer surface of the first end flange and the frictional engagement of the second longitudinal surface with the inner surface of the channel wall sufficient to retain the I-core in a fixed position, both longitudinally and vertically, within the I-core receiving channel.

US Pat. No. 9,837,194

OUTPUT TRANSFORMER AND RESONANT INDUCTOR IN A COMBINED MAGNETIC STRUCTURE

Universal Lighting Techno...

1. A magnetic assembly comprising:
a bobbin structure having
a first flange, the first flange having a first outer flange surface,
a second flange spaced apart from the first flange in a first direction,
a third flange spaced apart from the second flange in the first direction,
a fourth flange spaced apart from the third flange in the first direction,
a first core passage extending between the first flange and the second flange,
a second core passage extending between the third flange and the fourth flange,
a third core passage, the third core passage positioned between the second flange and the third flange, the third core passage
oriented perpendicular to the first core passage and the second core passage,

a first pin rail and a second pin rail, the first pin rail and the second pin rail extending perpendicularly from the first
flange in a second direction opposite the first direction, the first pin rail spaced apart from the second pin rail by a core
channel on the outer surface of the first flange, the first core passage extending to the core channel;

a first coil at least partially surrounding the first core passage;
a second coil at least partially surrounding the second core passage;
an I-core having at least a central portion positioned in the third core passage, the I-core having a first planar surface
and a second planar surface;

a first E-core having a main body positioned in the core channel between the first pin rail and the second pin rail, having
a center leg positioned in the first core passage and having a first outer leg and a second outer leg, the first and second
outer legs of the first E-core having respective end surfaces contacting the first planar surface of the I-core; and

a second E-core having a center leg positioned in the second core passage and having a first outer leg and a second outer
leg, the first and second outer legs and the center leg of the second E-core having respective end surfaces positioned proximate
to and spaced apart from the second planar surface of the I-core.

US Pat. No. 9,645,597

CIRCUIT AND METHOD FOR INDIRECTLY SENSING CURRENT AND VOLTAGE IN A FLOATING OUTPUT POWER SUPPLY

UNIVERSAL LIGHTING TECHNO...

1. A light fixture comprising:
a light source operable to provide light in response to receiving power;
a floating output power supply operable to provide power to the light source, said floating output power supply having a circuit
ground, a negative output referenced to a ground electrically separated from the circuit ground, and a positive output;

the floating output power supply further comprising
an alternating current (AC) power supply referenced to the circuit ground of the floating output power supply,
a controller having a voltage sensing input configured to sense an output voltage of the floating output power supply and
a current sensing input configured to sense an output current of the floating output power supply, wherein the controller
is configured to adjust an operating characteristic of the AC power supply as a function of the sensed output current and
the sensed output voltage,

a rectifier circuit comprising a first diode and a second diode connected in series between the negative output and the positive
output of the floating output power supply, wherein the first diode has an anode connected to the negative output of the floating
output power supply and a cathode connected to the circuit ground and the second diode has a cathode connected to the positive
output of the floating output power supply,

a current sensing resistor connected between an anode of the second diode and the circuit ground, wherein the current sensing
input of the controller is connected to the anode of the second diode, and

a resistive network connected in series between the negative output and the positive output of the floating output power supply,
said resistive network comprising

a first resistor connected between the negative output of the floating output power supply and the circuit ground of the floating
output power supply,

a second resistor having a first terminal connected to the circuit ground of the floating output power supply and a second
terminal connected to the voltage sensing input of the controller, and

a third resistor having a first terminal connected to the positive output of the floating output power supply and a second
terminal connected to the second terminal of the second resistor; and

a housing configured to support the light source and the floating output power supply.

US Pat. No. 10,004,123

FAILURE DETECTION AND ALERTING CIRCUIT FOR A DIFFERENTIAL MODE SURGE PROTECTION DEVICE IN AN LED DRIVER

UNIVERSAL LIGHTING TECHNO...

1. A failure indication circuit for monitoring a three-terminal, internally thermally fused surge protection device (SPD), the SPD including a metal-oxide varistor (MOV) in series with a thermal fuse between a first power terminal and a second power terminal, the first power terminal and the second power terminal connected to a first AC input terminal and a second AC input terminal, respectively, to receive an AC voltage across the first power terminal and the second power terminal, the SPD further including a monitor output line connected to a common node between the MOV and the thermal fuse, the common node connected to the first power terminal when the thermal fuse is intact, the common node disconnected from the first power terminal when the thermal fuse is open, the failure indication circuit comprising:a diode, a resistor and an input circuit of an optical isolator connected in series between the monitor output line of the SPD and one of the first and second power terminals of the SPD;
a voltage source that provides a supply voltage referenced to a DC reference voltage;
a resistor and an output circuit of the optical isolator connected in series between the voltage source and the DC reference voltage, the output circuit of the optical isolator having an output node connected to the resistor;
a capacitor connected between the output node of the optical isolator and the DC reference voltage, the capacitor charging during a first half-cycle of each cycle of the AC voltage across the first and second power terminals, the capacitor discharging during a second half-cycle of each cycle of the AC voltage only when the thermal fuse is intact, the capacitor remaining charged during the second half-cycle of each cycle of the AC voltage when the thermal fuse is open;
a semiconductor switch having a control input terminal, a current input terminal and a current output terminal, the control input terminal coupled to the output node of the optical isolator, the current output terminal connected to the reference voltage, the semiconductor switch turning on only when the capacitor remains charged during the second half-cycles of a plurality of cycles of the AC voltage; and
a light-emitting diode (LED) and a current limiting resistor connected in series between the low-voltage source and the current input terminal of the semiconductor switch, the LED illuminating when current flows through the semiconductor switch when the capacitor remains charged during the second half-cycles of the plurality of cycles of the AC voltage.

US Pat. No. 9,842,683

BOBBIN AND E-CORE ASSEMBLY CONFIGURATION AND METHOD FOR E-CORES AND EI-CORES

UNIVERSAL LIGHTING TECHNO...

1. A magnetic assembly comprising:
a bobbin comprising a first outer flange, a second outer flange, a passageway extending through the bobbin from the first
outer flange to the second outer flange, and at least one winding wound about the passageway, the bobbin further comprising
a first channel extending from the first outer flange and a second channel extending from the second outer flange, the bobbin
further comprising a first plurality of crushable ribs extending outward from the first outer flange into the first channel
and a second plurality of crushable ribs extending outward from the second outer flange into the second channel;

a first core having a main body, a first outer leg, a second outer leg, and a center leg extending from the main body, the
center leg having an end surface, the center leg of the first core positioned in the passageway of the bobbin with at least
a portion of the main body of the core positioned in the first channel in crushing frictional engagement with the first plurality
of ribs to crush at least a portion of each rib to increase friction between the main body of the first core and the ribs
to thereby secure the first core to the bobbin; and

a second core having a main body, at least a portion of the main body of the second core positioned in the second channel
in crushing frictional engagement with the second plurality of crushable ribs to crush at least a portion of each rib to increase
friction between the main body of the second core and the ribs to thereby secure the second core to the bobbin, a facing surface
of the second core positioned proximate to the end surface of the center leg of the first core.

US Pat. No. 9,826,583

AUXILIARY POWER SUPPLY WITH DYNAMICALLY ADJUSTABLE OUTPUT

Universal Lighting Techno...

1. An adjustable auxiliary power supply for a light emitting diode (LED) driver for adjusting an auxiliary power output, the
adjustable auxiliary power supply comprising:
a voltage regulator configured to receive a regulator input voltage and to output an auxiliary power supply voltage selected
from a first output voltage and a second output voltage according to a voltage selection signal;

a first input voltage circuit having a first control switch, the first input voltage circuit being associated with the first
output voltage and being configured to selectively output a first input voltage as the regulator input voltage via the first
control switch when the voltage selection signal corresponds to the first output voltage;

a second input voltage circuit having a second control switch, the second input voltage circuit being associated with the
second output voltage and being configured to selectively output a second input voltage as the regulator input voltage via
the second control switch when the voltage selection signal corresponds to the second output voltage; and

an adjustable resistance circuit coupled to the voltage regulator, the adjustable resistance circuit configured to control
the auxiliary power supply voltage based on an adjustable resistance setting of the adjustable resistance circuit, the adjustable
resistance setting corresponding to at least one of the first output voltage and the second output voltage.

US Pat. No. 10,128,740

DYNAMIC AC IMPEDANCE STABILIZATION IN A FLYBACK LED DRIVER

Universal Lighting Techno...

1. A drive circuit for providing a load current to a load having an AC resistance, the drive circuit comprising:an isolation transformer, which includes a primary winding and a secondary winding;
a flyback converter controller configured to selectively apply a pulsing DC voltage to the primary winding of the isolation transformer to generate a current in the secondary winding of the isolation transformer;
a diode coupled to the secondary winding of the isolation transformer, the diode configured to provide a rectified secondary current;
a secondary filter capacitor coupled to receive the rectified secondary current, the secondary filter capacitor including a first capacitor terminal and a second capacitor terminal;
a first output terminal coupled to the first capacitor terminal, and a second output terminal coupled to the second capacitor terminal, the first and second output terminals connectable to a load to provide a current path for a load current between the secondary filter capacitor and the load;
a current sensing circuit coupled to the current path to sense a magnitude of the load current and to provide a feedback signal to the flyback converter, the flyback converter responsive to the feedback signal to control the pulsing DC voltage to the primary winding of the isolation transformer to thereby control the magnitude of the load current, the load current including an AC ripple superimposed on an average DC current, the AC ripple having a magnitude inversely responsive to the AC resistance of the load, wherein the current sensing circuit includes a current sensing resistor in the current path; and
a stabilizing resistance connected in the current path, the stabilizing resistance having a resistance value selected to be much greater than a minimum AC resistance of the load connected between the first and second output terminals, wherein the stabilizing resistance is a dynamic resistance connected in series with the sensing resistor in the current path, the dynamic resistance responsive to a voltage across the first and second output terminals, the dynamic resistance having a first resistance value when the voltage across the first and second output terminals is below a threshold voltage, the dynamic resistance having a second resistance value when the voltage across the first and second output terminals is at least as great as the threshold voltage, the first resistance value much greater than the second resistance value and wherein the dynamic resistance comprises:
a stabilizing resistor having the first resistance value, the stabilizing resistor connected in series with the sensing resistor in the current path;
a semiconductor switch including a controlled conduction path connected across the stabilizing resistor, the semiconductor switch including a control input terminal responsive to a control input voltage to selectively turn on the controlled conduction path and apply a low resistance across the stabilizing resistor; and
a control input circuit that provides a control voltage to the control input terminal of the semiconductor switch, the control input circuit responsive to a load voltage between the first output terminal and the second output terminal to generate a first control voltage to the control input terminal to turn on the semiconductor switch when the load voltage is above a threshold voltage and to generate a second control voltage to the control input terminal to turn off the semiconductor switch when the load voltage is below the threshold voltage.

US Pat. No. 9,769,890

CIRCUIT AND METHOD FOR ELIMINATING POWER-OFF FLASH FOR LED DRIVERS

Universal Lighting Techno...

1. A drive circuit for providing a DC voltage to a plurality of light-emitting diodes (LEDs), comprising:
a rectifier configured to convert an applied AC voltage to a rectified DC voltage;
a passive voltage circuit configured to receive the rectified DC voltage and produce a first charging voltage;
a power factor correction circuit having an input configured to receive the rectified DC voltage and having an output configured
to provide a rail DC voltage;

a switching DC-DC converter configured to receive the rail DC voltage and convert the rail DC voltage to an LED drive voltage
and to a second charging voltage, the DC-DC converter including a controller, at least first and second semiconductor switches,
and a resonant tank circuit, the semiconductor switches selectively switched by the controller to produce a switched DC voltage,
the resonant tank circuit responsive to the switched DC voltage to produce the LED drive voltage, the controller having a
power input terminal, the controller operable to switch the semiconductor switches only when a voltage on the power input
terminal is at least as great as a controller threshold voltage;

a filter capacitor coupled to provide a controller supply voltage to the power input terminal of the controller, the filter
capacitor configured to receive the first charging voltage when the applied AC voltage is initially applied to the rectifier,
the first charging voltage charging the capacitor to the controller threshold voltage, the capacitor receiving the second
charging voltage when the controller is operable after the capacitor charges to the controller threshold voltage; and

a voltage drop sensing circuit coupled to receive the first charging voltage, the voltage drop sensing circuit configured
to sense when the first charging voltage decreases upon loss of the applied AC voltage, the voltage drop sensing circuit responsive
to the decreasing first charging voltage to discharge the filter capacitor below the controller threshold voltage to halt
the operation of the controller and thereby cease producing the LED drive voltage.

US Pat. No. 9,769,896

LED DRIVER WITH OFFLINE TUNING INTERFACE USING HOT AND NEUTRAL INPUTS

Universal Lighting Techno...

1. An LED driver tuning system comprising:
first and second input power terminals;
a power converter configured to generate an output voltage and an output current for driving an LED array, responsive to input
power provided across the first and second input power terminals during an online mode of operation;

a tuning interface device configured for coupling to at least the first and second input power terminals during an offline
mode of operation;

a controller configured to generate a dimming control signal based on an input received across first and second dimming input
terminals during an online mode of operation, and

the controller configured during the offline mode of operation to modify one or more programmed operating parameters based
on a predetermined sequence of digital pulses received via the tuning interface device;

wherein the output voltage and the output current generated by the power converter is regulated during the online mode of
operation based on the dimming control signal, a sensed output from the power converter, and the one or more programmed operating
parameters.

US Pat. No. 9,978,496

STACKED MAGNETIC ASSEMBLY

Universal Lighting Techno...

1. A magnetic device for an electronic circuit comprising: a printed circuit board having a planar mounting surface; a first magnetic component assembly mounted on the printed circuit board, the first magnetic component assembly including a first bobbin having a first axial passage extending through the first bobbin from a first end of the first bobbin to a second end of the first bobbin, the first bobbin including a plurality of first bobbin terminal pins electrically connected to the printed circuit board; at least a first winding disposed around the first axial passage of the first bobbin; and a first core structure, the first core structure having a respective first end portion positioned proximate to the first end of the first bobbin, a respective second end portion positioned proximate to the second end of the first bobbin, at least a respective first outer leg portion, the respective first outer leg portion extending from the respective first end portion toward the respective second end portion,at least a respective second outer leg portion, the respective second outer leg portion extending from the respective first end portion toward the respective second end portion, and
at least a respective middle leg portion, the respective middle leg portion extending from the respective first end portion into the first axial passage toward the respective second end portion, wherein
the respective first end portion, the respective second end portion, the respective middle leg portion, the respective first outer leg portion and the respective second outer leg portion of the first core structure form a first set of complete magnetic paths, the first set of complete magnetic paths comprising magnetic path components extending through the middle leg in the first axial passage and magnetic path components through the first and second outer legs of the first core structure, the magnetic path components of the first set of complete magnetic paths parallel to the planar mounting surface of the printed circuit board, and
the respective first end portion, the respective second end portion, the respective first outer leg portion and the respective second outer leg portion of the first core structure define an outer boundary of the first magnetic component assembly;anda second magnetic component assembly mounted on the printed circuit board, the second magnetic component assembly stacked on the first magnetic component assembly, the second magnetic component assembly including
a second bobbin having a second axial passage extending through the second bobbin from a first end of the second bobbin to a second end of the second bobbin, the second bobbin including a first plurality of second bobbin terminal pins extending from the second bobbin near the first end of the second bobbin and a second plurality of second bobbin terminal pins extending from the second bobbin near the second end of the second bobbin, the first and second pluralities of second bobbin terminal pins extending to the printed circuit board and electrically connected to the printed circuit board, the first and second pluralities of second bobbin terminal pins positioned outside the outer boundary of the first magnetic component assembly;
at least a second winding disposed around the second axial passage of the second bobbin; and
a second core structure, the second core structure having a respective first end portion positioned proximate to the first end of the second bobbin,
a respective second end portion positioned proximate to the second end of the second bobbin,
at least a respective first outer leg portion, the respective first outer leg portion extending from the respective first end portion toward the respective second end portion,
at least a respective second outer leg portion, the respective second outer leg portion extending from the respective first end portion toward the respective second end portion, and
at least a respective middle leg portion, the respective middle leg portion of core extending from the respective first end portion into the second axial passage toward the respective second end portion, wherein the respective first end portion, the respective second end portion, the respective middle leg portion, the respective first outer leg portion and the respective second outer leg portion of the second core structure form a second set of complete magnetic paths, the second set of complete magnetic paths comprising magnetic path components extending through the middle leg portion in the second axial passage and magnetic path components through the first and second outer leg portions of the second core structure, the magnetic path components of the second set of complete magnetic paths parallel to the planar mounting surface of the printed circuit board and parallel to the magnetic path components of the first set of complete magnetic paths.

US Pat. No. 9,835,322

FLOW THROUGH EXTENDED SURFACE TROFFER SYSTEM

UNIVERSAL LIGHTING TECHNO...

1. A light apparatus comprising:
a printed circuit board having first and second sides;
a first light source mounted on the first side of the printed circuit board;
a second light source mounted on the second side of the printed circuit board;
a first optical member positioned to receive and redirect light from the first light source;
a second optical member positioned to receive and redirect light from the second light source; and
at least one vent aperture defined in the printed circuit board, the vent aperture located between the first and second optical
members;

a housing at least partially surrounding the printed circuit board, the first and second light sources, and the first and
second optical members;

the housing further comprises a first housing vent and a second housing vent,
the first housing vent positioned adjacent the first optical surface, the second housing vent positioned adjacent the second
optical surface;

the vent aperture in the printed circuit board and the first housing vent define a first convective path; and
the vent aperture in the printed circuit board and the second housing vent define a second convective path.

US Pat. No. 9,816,681

SIDE LIT INDIRECT FLEXIBLE LIGHTING SYSTEM

Universal Lighting Techno...

1. A portable indirect lighting apparatus comprising:
a first support structure comprising
a first longitudinal light source, the first longitudinal light source comprising a first linear array of light-emitting diodes
(LEDs), and

a first longitudinal lens positioned with respect to the first linear array of LEDs, the first longitudinal lens receiving
light emitted by the first linear array of LEDs over a respective first angular range and redirecting the light over a respective
second angular range;

a second support structure comprising
a second longitudinal light source, the second longitudinal light source comprising a second linear array of LEDs, and
a second longitudinal lens positioned with respect to the second linear array of LEDs, the second longitudinal lens receiving
light emitted by the second linear array of LEDs over a respective first angular range and redirecting the light over a respective
second angular range;

and
a reflector extending between the first support structure and the second support structure, the reflector comprising a flexible
material having at least one diffusedly reflective surface, the reflector having a transportable configuration with at least
a portion of the reflector wrapped around at least one of the first and second support structures and an operational configuration
with the reflector unwrapped from the at least one of the first and second support structures, the at least one diffusedly
reflective surface receiving the light redirected in the respective second angular ranges from the first and second longitudinal
lenses in the operational configuration.

US Pat. No. 9,756,703

LIGHTING CONTROL SYSTEM AND METHOD FOR COMMUNICATION OF SHORT MESSAGING

Universal Lighting Techno...

1. A lighting system comprising:
a light fixture including a light source and a controller;
a plurality of occupancy sensors associated with the light fixture, wherein each occupancy sensor is configured to generate
output signals only upon determining no occupancy in a defined area;

the controller for the light fixture is configured to
count a number of occupancy sensors from which output signals are received during each of sequential predetermined time windows,
operate the light source in a first lighting state comprising a disabled or dimmed lighting output upon identifying output
signals as received from each of a predetermined number of associated occupancy sensors within a particular predetermined
time window, and

operate the light source in a second lighting state comprising a full lighting output upon identifying output signals as received
from less than the predetermined number of associated occupancy sensors within the predetermined time window.

US Pat. No. 9,980,328

APPARATUS, SYSTEM, AND METHOD FOR CONFIGURING AN UNPOWERED LED DRIVER USING AN RS-232 INTERFACE

UNIVERSAL LIGHTING TECHNO...

1. A light emitting diode (LED) driver for permitting unpowered tuning, comprising:an RS-232 serial connector;
an RS-232 serial interface controller coupled to the RS-232 serial connector, the RS-232 serial interface controller including a serial received voltage input coupled to the RS-232 serial connector and a serial transmit voltage output coupled to the RS-232 serial connector, wherein the RS-232 serial interface controller is configured to provide an RS-232 port for the LED driver;
a voltage regulator coupled between the RS-232 serial connector and the RS-232 serial interface controller, the voltage regulator configured (i) to receive a voltage regulator input voltage at least in part from the RS-232 serial connector when operating in an unpowered tuning mode, and (ii) to output a regulated voltage; and
a controller including a controller received voltage input and a controller transmit voltage output each coupled to the RS-232 serial interface controller, the controller configured to be powered by the regulated voltage during an unpowered tuning operation.

US Pat. No. 9,913,346

SURGE PROTECTION SYSTEM AND METHOD FOR AN LED DRIVER

UNIVERSAL LIGHTING TECHNO...

1. A protection system for a light emitting diode (LED) driver, the protection system comprising:
a voltage rail;
an input voltage source configured to provide input power to the voltage rail;
a surge protector coupled between the input voltage source and the voltage rail;
a voltage change sensing block configured to detect a change in a voltage associated with the input voltage source;
a voltage sensing block coupled to the voltage change sensing block;
a half-bridge switching circuit comprising a controller, a first switching element, and a second switching element, the controller
configured to control an operating state of each of the first switching element and the second switching element; and

a reset block connected to the controller, the reset block configured to disable at least one of the controller, the first
sensing element, and the second switching element responsive to a control signal associated with at least one of the voltage
change sensing block and the voltage sensing block.

US Pat. No. 9,844,118

AC LED DRIVER CIRCUIT

UNIVERSAL LIGHTING TECHNO...

1. A light-emitting diode (LED) driver circuit comprising:
a rectifier circuit configured to receive an AC voltage and produce between a voltage rail and a reference rail a rectified
DC having a sinusoidal magnitude during each half-cycle of the AC voltage;

at least a first LED string comprising a first plurality of light-emitting diodes (LEDs) and a second LED string comprising
a second plurality of LEDs, the first LED string having a respective first terminal connected to the voltage rail and having
a respective second terminal, the second LED string having a respective first terminal connected to the second terminal of
the first LED string and having a respective second terminal;

a first current regulator having a respective first terminal connected to the second terminal of the first LED string and
having a respective second terminal connected to the reference rail,

the first current regulator configured, when the rectified DC voltage has a magnitude within a first voltage range, to enable
a first current having a first current magnitude to flow from the second terminal of the first LED string to the reference
rail, the first current flowing through the first LED string and not through the second LED string; and

a second current regulator having a respective first terminal connected to the second terminal of the second LED string and
having a respective second terminal connected to the reference rail,

the second current regulator configured, when the rectified DC voltage has a magnitude within a second voltage range that
is non-overlapping with respect to the first voltage range, to enable a second current having a second current magnitude to
flow from the second terminal of the second LED string to the reference rail, the second current flowing through the first
LED string and through the second LED string,

wherein when the magnitude of the rectified DC voltage is increasing, the first current regulator disables the first current
through the first LED string before the second current regulator enables the second current through the first LED string and
the second LED string.

US Pat. No. 10,103,538

SURGE PROTECTION CIRCUIT FOR A HALF-BRIDGE POWER CONVERTER

Universal Lighting Techno...

1. A light fixture operable to provide light in response to receiving power from a power source, said light fixture comprising:a light source operable to provide light in response to receiving power;
a driver circuit operable to provide power from the power source to the light source, said driver circuit comprising:
an input stage operable to receive power from the power source and provide a direct current (DC) power rail, wherein a voltage of the DC power rail is substantially proportional to a voltage of the power source;
a surge protector operable to limit the voltage of power received from the power source at the input stage;
an output stage operable to receive power from the DC power rail and provide output power to the light source when operating, wherein the output stage comprises a half bridge inverter comprising a pair of switches, wherein a switch of the pair of switches has a rated voltage;
a voltage regulator operable to receive power from the DC power rail and provide a bias voltage to a controller operable to operate the output stage when enabled, wherein the controller is connected to the DC power rail via the voltage regulator and the overvoltage protection circuit; and
an overvoltage protection circuit operable to determine the voltage of the DC power rail, enable the controller, and selectively disable the controller when the determined voltage of the DC power rail exceeds a predetermined threshold that is approximately the rated voltage, wherein the overvoltage protection circuit is configured to disable the controller by preventing the voltage regulator from receiving power from the DC power rail,
further wherein the pair of switches are opened throughout an input surge condition corresponding to the determined DC power rail voltage exceeding the predetermined threshold; and
a housing configured to support the light source and the driver circuit.

US Pat. No. 9,674,907

INPUT SURGE PROTECTION CIRCUIT AND METHOD FOR A NON-ISOLATED BUCK-BOOST LED DRIVER

UNIVERSAL LIGHTING TECHNO...

1. An LED driver comprising:
a direct current (DC) power source configured to provide DC power across first and second lines;
a capacitor coupled across the first and second lines at an output end of the DC power source;
a power factor correction (PFC) circuit coupled across the first and second lines; and
a surge protection circuit branch coupled across the first and second lines and between the capacitor and the PFC circuit,
wherein the surge protection circuit branch is configured
to operate as an open circuit during normal operating conditions with respect to a peak input voltage across the capacitor,
responsive to a surge condition with respect to excess energy across the capacitor, to absorb the excess energy within the
circuit branch, and

responsive to a return from the surge condition to normal operating conditions with respect to the peak input voltage across
the capacitor, to revert to operation as an open circuit.

US Pat. No. 10,098,194

CURRENT AND VOLTAGE CONTROL CIRCUIT AND METHOD FOR A CLASS II LED DRIVER

Universal Lighting Techno...

1. A driver circuit having a combined current and voltage control circuit for driving a light emitting diode (LED) load, the driver circuit comprising:an isolation transformer having a primary winding, a secondary winding, and an auxiliary winding;
a primary side circuit coupled to the primary winding of the isolation transformer, the primary side circuit having a power factor controller and a switch, the power factor controller configured to control an output current to the LED load by controlling an operational state of the switch;
a secondary side circuit coupled to the secondary winding, the secondary side circuit having a proportional and integration (PI) control portion configured to output a control signal, the secondary side circuit configured to drive the LED load; and
the combined voltage and current control circuit coupled to the auxiliary winding, the combined voltage and current control circuit having an optocoupler coupled to the power factor controller and to the PI control section and a voltage feedback resistor group, the voltage feedback resistor group having a first divider formed by a first and a second dividing resistor, and having a second divider formed by the optocoupler and a third dividing resistor,
wherein the combined voltage and current control circuit is configured to transmit a control signal from the PI control section to the power factor controller, the control signal obtained between the collector of the optocoupler and an intersection between the first and second dividing resistors.

US Pat. No. 10,098,202

CONSTANT CURRENT SOURCE WITH OUTPUT VOLTAGE RANGE AND SELF-CLAMPING OUTPUT VOLTAGE

Universal Lighting Techno...

1. A driver circuit operable to provide current to a light source from a direct current (DC) power source having a power rail and a ground, the driver circuit comprising:first and second switches coupled in series between the power rail and the ground of the DC power source;
a resonant circuit comprising one resonant inductor and one resonant capacitor coupled in series on a first end to a node between the first and second switches and on a second end to the ground of the DC power source;
a first clamping diode having an anode connected to a junction between the resonant inductor and the resonant capacitor and a cathode connected to the power rail of the DC power source;
a second clamping diode having an anode connected to the ground of the DC power source and a cathode connected to the junction between the resonant capacitor and the resonant inductor;
an isolating transformer comprising a primary winding coupled in parallel with the resonant capacitor, and a secondary winding;
an output rectifier having an input connected to the secondary winding of the isolating transformer and an output operable to connect to the light source; and
a controller operable to sense a current provided to the light source from the output rectifier and adjust a switching frequency of the first and second switches as a function of the sensed current to maintain the sensed current at a target current,
wherein the controller is connected to a dimming circuit and configured to receive a dimming signal from the dimming circuit, and
wherein the controller is operable to control the current provided to the light source as a function of the received dimming signal by adjusting the target current as a function of the received dimming signal.

US Pat. No. 10,083,790

METHOD AND APPARATUS FOR ATTACHING MAGNETIC COMPONENTS TO PRINTED CIRCUIT BOARDS

Universal Lighting Techno...

1. A bobbin for a magnetic component, the bobbin comprising:a bobbin body, the bobbin body having a first flange and a second flange, having a longitudinal axis, and having a passage extending through the bobbin body from the first flange to the second flange along the longitudinal axis;
a first pin rail fixed to the first flange of the bobbin body and extending downwardly in a first direction away from the bobbin body to a respective lower side of the first pin rail;
a second pin rail fixed to the second flange of the bobbin body and extending in the first direction away from the bobbin body to a respective lower side of the second pin rail;
a first pin row comprising a first plurality of L-shaped pins, each L-shaped pin having a substantially vertical stem extending perpendicularly from the respective lower side of the first pin rail and a substantially horizontal arm extending from a bottom end of the stem, the horizontal arm being parallel to the respective lower side of the first pin rail;
a second pin row comprising a second plurality of pins, the second plurality of pins comprising straight pins extending perpendicularly from the respective lower side of the second pin rail;
a first plurality of standoffs proximate to the first pin rail and extending in the first direction, the first plurality of standoffs positioned between the first pin row and the second pin rail; and
a second plurality of standoffs proximate to the second pin rail and extending in the first direction,
wherein each standoff in the first and second plurality of standoffs has a face parallel with the lower side of each of the first and second pin rails.

US Pat. No. 9,837,913

CONTROL METHOD TO AVOID CAPACITIVE MODE SWITCHING FOR RESONANT CONVERTERS

UNIVERSAL LIGHTING TECHNO...

1. A method of avoiding capacitive switching in a resonant power converter having an operating frequency, the method comprising:
generating one or more feedback signals representing respective output values of the resonant power converter;
regulating the operating frequency of the resonant power converter based at least on a value of a first feedback signal relative
to a reference value;

determining a capacitive switching mode of operation for the resonant power converter based on a detected direction of change
in an output value relative to a detected direction of change in the operating frequency; and

setting the operating frequency to a preceding operating frequency and disabling regulation of the operating frequency therefrom.

US Pat. No. 10,320,181

FAILURE DETECTION AND ALERTING CIRCUIT FOR A COMMON MODE SURGE PROTECTION DEVICE IN AN LED DRIVER

Universal Lighting Techno...

1. A surge protection device for a lighting system, the device comprising:first, second, and third input lines;
a first surge suppression circuit coupled between the first input line and the second input line;
a second surge suppression circuit coupled between the second input line and the third input line;
a fault detection circuit coupled between the first surge suppression circuit and the second surge suppression circuit and configured responsive to a normal operation mode to activate an indicator lamp and responsive to a short circuit fault mode to shut off the indicator lamp;
the first surge suppression circuit comprising a first thermal cutoff device coupled to the first input line and in series with a first clamping device coupled to the second input line, the fault detection circuit coupled at a first end to a respective node between the first thermal cutoff device and the first clamping device; and
the second surge suppression circuit comprising a second clamping device coupled to the second input line and in series with a second thermal cutoff device coupled to the third input line, the fault detection circuit coupled at a second end to a respective node between the second clamping device and the second thermal cutoff device.

US Pat. No. 10,041,984

INPUT VOLTAGE SENSE CIRCUIT FOR BOOST POWER FACTOR CORRECTION IN ISOLATED POWER SUPPLIES

Universal Lighting Techno...

1. A linear isolated power supply circuit for a light emitting diode (LED) driver, comprising:a boost converter having a boost inductor winding;
a voltage sensing circuit comprising
a first resistor coupled on a first end to an auxiliary side winding magnetically coupled to the boost inductor winding and on a second end to both of an attenuating capacitor and an anode of a rectifying diode,
a low pass filter coupled to a cathode of the rectifying diode, and
an output resistor having a first end and a second end, the first end coupled to the low pass filter,
the voltage sensing circuit configured to measure an input voltage at an isolated circuit associated with the auxiliary side winding; and
a processor configured to receive the measured input voltage from the voltage sensing circuit and to cause at least one operation to be performed by the processor based at least in part upon the measured input voltage.

US Pat. No. 10,186,809

PRINTED CIRCUIT BOARD CONNECTOR WITH INTEGRATED EMI NOISE SUPPRESSION

Universal Lighting Techno...

1. A connector assembly for suppressing electromagnetic interference (EMI) generated by electronic circuitry on a printed circuit board (PCB), the connector assembly comprising:a plurality of conductive through-holes forming a hole pattern on the PCB, the conductive trough-holes electrically connected to the electronic circuitry;
a connector having a plurality of terminal pins extending from a connector surface, the plurality of terminal pins configured to form a pin pattern conforming to the hole pattern of the conductive through-holes on the PCB, the terminal pins insertable into the conductive through-holes of the of the PCB to electrically connect the terminal pins to the electronic circuitry, the connector having an outer perimeter; and
a tube of magnetic material surrounding the outer perimeter of the connector, the tube having a first end surface configured to abut a PCB surface of the PCB.

US Pat. No. 10,178,720

LOW STANDBY POWER CONTROL CIRCUIT FOR LED DRIVER

Universal Lighting Techno...

1. An LED driver comprising:a power factor correction (PFC) stage coupled to receive input power from a DC input power stage;
an isolated DC-DC power converter stage coupled to an output of the PFC stage, and configured to provide DC current to an LED lighting load;
first and second regulators configured to provide drive signals to the PFC stage and the isolated DC-DC power converter stage, respectively;
one or more auxiliary sensors configured to detect one or more environmental conditions;
a controller coupled to receive auxiliary feedback signals from the one or more auxiliary sensors, and configured to provide standby mode signals or normal operating mode signals based on a detected environmental condition from the one or more auxiliary sensors; and
a low standby isolated power supply circuit comprising
a power converter comprising a primary side coupled to the DC input power stage and a secondary side coupled to supply power to the controller and the one or more auxiliary sensors,
a switching element coupled to the primary side of the power converter,
an input resistor coupled on a first end between the switching element and the primary side of the power converter, and
an isolation device configured responsive to the standby mode signals on a first side to disable supply power from the primary side of the power converter to the first and second regulators, and responsive to the normal operating mode signals on the first side to enable supply power from the primary side of the power converter to the first and second regulators, the isolation device having a second side coupled between a second end of the first input resistor and a gate electrode of the switching element, wherein the low standby isolated power supply circuit is configured
responsive to the normal operating mode signals to enable the first and second regulators,
responsive to the standby mode signals to disable the first and second regulators, and
in both modes to supply power to the controller and the one or more auxiliary sensors.

US Pat. No. 10,186,812

FERRITE WAFER AND CONNECTOR ASSEMBLY FOR EMI NOISE SUPPRESSION ON A PRINTED CIRCUIT BOARD

Universal Lighting Techno...

1. A connector assembly for suppressing electromagnetic interference (EMI) generated by electronic circuitry on a printed circuit board (PCB), the connector assembly comprising:a plurality of conductive through-holes forming a conductive through-hole pattern on the PCB;
a connector having an outer perimeter wall, a lower connector surface, and a connector height extending vertically from the lower connector surface, the connector including a plurality of terminal pins configured to form a pin pattern conforming to the conductive through-hole pattern of the conductive through-holes on the PCB, the plurality of terminal pins engageable with the plurality of conductive through-holes; and
a magnetic wafer cup coupleable between the PCB and the lower connector surface, the magnetic wafer cup having a main wafer body, a upper wafer surface, a lower wafer surface, and contiguous walls extending vertically from the main wafer body and surrounding the upper wafer surface, the main wafer body having a plurality of wafer holes configured to align with the terminal pins and the conductive through-holes, the lower wafer surface configured to contact the PCB, the upper wafer surface configured to contact the lower connector surface, the contiguous walls configured to surround the outer perimeter wall of the connector by a vertical portion of the connector height.

US Pat. No. 10,243,473

GATE DRIVE IC WITH ADAPTIVE OPERATING MODE

Universal Lighting Techno...

1. A power converter comprising:a power stage comprising at least one switching element and configured to provide to a load an output current corresponding to an on-time of the at least one switching element;
a controller configured to selectively enable and disable gate drive signals to the switching element to maintain a desired output current,
wherein the controller during a first operating mode is configured to generate gate drive signals in accordance with a predetermined minimum on-time and a predetermined maximum off-time,
wherein the controller is configured, upon sensing that one or more gate drive signals have reached the predetermined minimum on-time and predetermined maximum off-time during the first operating mode, during a second operating mode to fix an on-time for subsequently generated gate drive signals to be equal to the predetermined minimum on-time and to enable adjustment of an off-time for said gate drive signals to be greater than or equal to the predetermined maximum off-time.

US Pat. No. 10,320,303

FREQUENCY CONTROLLED DUMMY LOAD TO STABILIZE PFC OPERATION AT LIGHT LOAD CONDITIONS

Universal Lighting Techno...

1. A system for controlling the current through a DC load, the system comprising:a first rectifier circuit configured to receive an AC voltage, the rectifier generating a rectified voltage on rectifier output;
a power factor controller coupled to the rectifier output, the power factor controller generating a conditioned DC voltage on a power factor controller output; and
a DC-to-DC converter coupled to the power factor controller output to receive the conditioned DC voltage and to generate a load current, the DC-to-DC converter including:
a DC-to-AC inverter configured to generate a switched AC voltage at an operating frequency, the operating frequency having a frequency range between a minimum frequency and a maximum frequency, the DC-to-AC inverter configured to vary the operating frequency in response to a feedback signal;
an isolation transformer having a primary winding and a secondary winding, the primary winding coupled to the output of the DC-to-AC inverter to receive the switched AC voltage and to produce a secondary AC voltage on the secondary winding;
a second rectifier circuit connected to the secondary winding of the isolation transformer to receive the secondary AC voltage, the second rectifier circuit configured to rectify the secondary AC voltage to provide a DC voltage to a load to cause a load current to flow through the load;
a current sensor that generates a feedback signal responsive to the magnitude of the load current and the magnitude of a reference current, the DC-to-AC inverter responsive to the feedback signal to increase the operating frequency when the magnitude of the load current is greater than the magnitude of the reference current and to decrease the operating frequency when the magnitude of the load current is less than the magnitude of the reference current; and
a frequency-dependent load impedance coupled to the output of the DC-to-AC inverter, the frequency-dependent load impedance configured to have a first impedance when the DC-to-AC inverter is operating at the minimum operating frequency, the frequency-dependent load impedance having a second impedance when the DC-to-AC inverter is operating at the maximum operating frequency.

US Pat. No. 10,320,283

RESONANT CONVERTER WITH PRE-CHARGING CIRCUIT FOR STARTUP PROTECTION

Universal Lighting Techno...

1. A power converter comprising:first and second switching elements coupled in series between a positive rail of a DC power source and a circuit ground;
a controller configured to generate drive signals to the switching elements, wherein an output from the switching elements corresponds to a frequency of the gate drive signals;
a resonant circuit comprising first and second capacitors, a resonant inductor, and output terminals for receiving a load; and
a pre-charge circuit coupled to the resonant tank and configured, after initially receiving power from the DC power source and prior to startup of the controller, to pre-charge at least one of the first and second capacitors in the resonant circuit to a steady state charge value for the at least one of the first and second capacitors, wherein the steady state charge value corresponds to one half of a voltage across the positive rail and the circuit ground.

US Pat. No. 10,264,641

LIGHTING SYSTEM AND METHOD FOR DYNAMICALLY REGULATING DRIVEN CURRENT TO AN ANALOG OR DIGITAL DIMMING INTERFACE

Universal Lighting Techno...

1. A lighting device comprising:a power converter configured to provide output power to a lighting load;
a controller configured to regulate operation of the power converter based at least in part on a desired dimming output for the lighting load; and
a dimming interface circuit comprising:
a first circuit coupled across the first and second interface terminals and comprising at least one switching element controlled on and off to regulate a level of current sourced from the dimming interface circuit to an external dimming device coupled across the first and second interface terminals, and
a second circuit coupled in parallel with the first circuit and configured to measure a control voltage across the first and second interface terminals,
wherein the dimming interface circuit is configured to
automatically detect a type of external dimming device coupled to the first and second interface terminals as being
analog, based on a sampled measurement of the control voltage across the first and second interface terminals as having a calculated ramp slope greater than a threshold value, or
digital, based on the sampled measurement of the control voltage across the first and second interface terminals as having the calculated ramp slope less than the threshold value,
dynamically adapt a level of constant current sourced from the dimming interface circuit to the external dimming device via the first and second interface terminals, based at least on the detected type of the external dimming device being analog or digital, and
generate dimming control signals to the controller based on dimming input signals from the external dimming device via the first and second interface terminals.

US Pat. No. 10,326,377

CIRCUIT AND METHOD FOR INDIRECT PRIMARY-SIDE LOAD CURRENT SENSING IN AN ISOLATED POWER SUPPLY

Universal Lighting Techno...

1. A system for controlling the current through a DC load, the system comprising:a DC-to-AC inverter configured to generate a primary AC voltage to a primary winding of an isolation transformer, the primary AC voltage having a nominal frequency, the primary winding having a primary magnetizing inductance;
a rectifier circuit connected to at least one secondary winding of the isolation transformer to receive a secondary AC voltage responsive to the primary AC voltage, the rectifier circuit configured to rectify the secondary AC voltage to provide a DC voltage to the DC load to cause a load current to flow through the DC load;
a first current sensor electrically coupled to the primary winding of the isolation transformer and configured to sense a sensed current responsive to the primary current through the primary winding, the primary current through the primary winding responsive to the load current through the DC load and further responsive to a magnetizing current, the first current sensor configured to provide a first feedback signal responsive to the sensed current, the first feedback signal including a component responsive to the primary magnetizing current; and
a feedback signal generator that outputs a second feedback signal, the feedback signal generator comprising:
an auxiliary winding of the isolation transformer, the auxiliary winding producing an auxiliary voltage responsive to the primary AC voltage;
an auxiliary inductor having an inductance proportional to the magnetizing inductance of the primary winding, the auxiliary inductor responsive to the auxiliary voltage to produce an auxiliary current;
an auxiliary sensing resistor that receives the auxiliary current and that produces a second feedback signal responsive to the auxiliary current, the second feedback signal having a component that offsets the component of the first feedback signal responsive to the magnetizing current, the second feedback signal combined with the first feedback signal to produce a total feedback signal representing only the load current through the DC load, the DC-to-AC inverter responsive to the total feedback signal to vary the frequency of the primary AC voltage to maintain the load current at a selected load current.

US Pat. No. 10,512,143

METHOD FOR COMMISSIONING LIGHTING SYSTEM COMPONENTS USING VOICE COMMANDS

Universal Lighting Techno...

1. A lighting control system comprising:a first device mounted in association with a lighting zone to be commissioned and comprising data storage;
a plurality of second devices in operable connection with the first device; and
a controller configured upon actuation of a commissioning mode via the first device, to direct the performance of a set of commissioning operations for each of the plurality of second devices, said operations comprising
providing an audio and/or visual notification corresponding to at least one of the plurality of second devices,
translating voice commands received via a microphone operably associated with the first device into device configuration data,
storing the device configuration data in the data storage and in association with an address for the at least one of the plurality of second devices.

US Pat. No. 10,483,864

METHOD FOR DETECTING SHORT CIRCUIT CONDITIONS IN FREQUENCY CONTROL LOOP COMPONENTS

Universal Lighting Techno...

1. A system for controlling a load current through a DC load, the system comprising:a self-oscillating switch driver integrated circuit (IC) having a first driver output and a second driver output coupled to a first semiconductor switch and a second semiconductor switch, the switch driver IC selectively applying driver output voltages to the first and second driver outputs to enable the first and second semiconductor switches at a variable frequency to generate a switched voltage signal referenced to a primary circuit ground reference, the switch driver IC varying the variable frequency in response to a current magnitude on a control input, the switch driver IC including a disable input terminal, the switch driver IC responsive to an active disable input signal on the disable input terminal to discontinue applying the driver output voltages;
an isolation transformer having a primary winding configured to receive the switched voltage signal, the isolation transformer having at least one secondary winding that generates a secondary AC voltage responsive to the switched voltage signal received by the primary winding;
a rectifier circuit connected to the at least one secondary winding of the isolation transformer to receive the secondary AC voltage, the rectifier circuit configured to rectify the secondary AC voltage to provide a DC voltage to the DC load to produce the load current through the DC load;
a current sensor that senses a magnitude of the load current to generate a sensor voltage responsive to the magnitude of the load current, the magnitude of the load current responsive to the variable frequency of the switch driver IC;
a feedback generator that outputs a feedback signal responsive to a difference between the sensor voltage and a reference voltage, the reference voltage representing a desired magnitude of the load current;
an optocoupler having an input stage and an output stage, the input stage coupled to receive the feedback signal, the output stage having a variable impedance between a first output terminal and a second output terminal responsive to the feedback signal;
a current control circuit having a first resistor and a second resistor connected in series between the control input of the switch driver IC and the primary circuit ground reference, the current control circuit further including a node between the first resistor and the second resistor;
a voltage superposition circuit connected between a supply voltage and the node of the current control circuit, the voltage superposition circuit including the output stage of the optocoupler in series with at least one resistor, the voltage superposition circuit responsive to the feedback voltage received by the input stage of the optocoupler to vary the impedance of the output stage to thereby vary a superposition voltage applied to the node of the current control circuit and vary the magnitude of the current on the control input of the switch driver IC; and
a fault detection circuit having a voltage sensor configured to sense a voltage across the output stage of the optocoupler, the fault detection circuit having an output coupled to the disable input terminal of the driver IC, the fault detection circuit responsive to the voltage across the output stage of the optocoupler being less than a minimum magnitude to activate the disable input signal on the disable input terminal to cause the driver IC to discontinue applying voltages to the first and second driver outputs.

US Pat. No. 10,480,966

ADAPTABLE FIXTURE MOUNT SENSOR FOR VAPOR TIGHT LIGHT FIXTURES

Universal Lighting Techno...

1. A method of mounting a sensor assembly on a corresponding light fixture having a fixture opening defined therein, the method comprising:for a first light fixture having a gasket lip extending adjacent to a sensing area of the sensor assembly when the sensor assembly is mounted on the first light fixture without a spacer:
(a) detaching a first mount portion from a second mount portion collinear with the first mount portion at a break point defined between the first mount portion and the second mount portion; and
(b) removably connecting the sensor assembly to the light fixture by inserting the second mount portion into the fixture opening; and
for a second light fixture having a gasket lip extending into the sensing area of the sensor assembly when the sensor assembly is mounted on the second light fixture without the spacer:
(c) placing the spacer that is longer than the second mount portion onto the sensor assembly such that at least some of the first mount portion extends beyond the spacer; and
(d) removably connecting the sensor assembly to the light fixture by inserting the first mount portion into the fixture opening.

US Pat. No. 10,476,399

FREQUENCY CONTROL METHOD FOR SELF-OSCILLATING CIRCUIT

Universal Lighting Techno...

1. A system for controlling a load current through a DC load, the system comprising:a self-oscillating switch driver integrated circuit (IC) having a first driver output and a second driver output coupled to a first semiconductor switch and a second semiconductor switch, the switch driver IC selectively enabling the first and second semiconductor switches at a variable frequency to generate a switched voltage signal referenced to a primary circuit ground reference, the switch driver IC varying the variable frequency in response to a current magnitude on a control input;
an isolation transformer having a primary winding configured to receive the switched voltage signal, the isolation transformer having at least one secondary winding that generates a secondary AC voltage responsive to the switched voltage signal received by the primary winding;
a rectifier circuit connected to the at least one secondary winding of the isolation transformer to receive the secondary AC voltage, the rectifier circuit configured to rectify the secondary AC voltage to provide a DC voltage to the DC load to produce the load current through the DC load;
a current sensor that senses a magnitude of the load current to generate a sensor voltage responsive to the magnitude of the load current, the magnitude of the load current responsive to the variable frequency of the switch driver IC;
a feedback generator that outputs a feedback signal responsive to a difference between the sensor voltage and a reference voltage, the reference voltage representing a desired magnitude of the load current;
an optocoupler having an input stage and an output stage, the input stage coupled to receive the feedback signal, the output stage having a variable impedance between a first output terminal and a second output terminal responsive to the feedback signal;
a current control circuit having a first resistor and a second resistor connected in series between the control input of the switch driver IC and the primary circuit ground reference, the current control circuit further including a node between the first resistor and the second resistor; and
a voltage superposition circuit connected between a supply voltage and the node of the current control circuit, the voltage superposition circuit including the output stage of the optocoupler in series with at least one resistor, the voltage superposition circuit responsive to the feedback signal received by the input stage to vary the impedance of the output stage to thereby vary a superposition voltage applied to the node of the current control circuit and vary the magnitude of the current on the control input of the switch driver IC, wherein:
the voltage superposition circuit has at least a first state when the output stage of the optocoupler has a minimum impedance;
the voltage superposition circuit has at least a second state when the output stage of the optocoupler has a maximum impedance;
the superposition circuit applies a maximum superposition voltage to the node of the current control circuit when the superposition circuit is in the first state, the current control circuit responsive to the maximum superposition voltage to enable a minimum current to flow out of the control input of the switch driver IC, the switch driver IC is responsive to the minimum current flowing out of the control input to operate at a minimum variable frequency; and
the superposition circuit applies no superposition voltage to the node of the current control circuit when the superposition circuit is in the second state, the current control circuit responsive to the absence of the superposition voltage to enable a maximum current to flow out of the control input of the switch driver IC, the switch driver IC is responsive to the maximum current flowing out of the control input to operate at a maximum variable frequency.

US Pat. No. 10,524,334

ELECTRICALLY ISOLATED SYSTEM AND METHOD FOR DIGITAL REGULATION OF A PROGRAMMABLE LIGHTING DEVICE

Universal Lighting Techno...

1. A lighting device comprising:a driving circuit configured to convert AC mains input power into an output current for driving a lighting load;
a wireless interface circuit coupled to an antenna and comprising a volatile memory interface,
wherein the wireless interface circuit is configured
to receive device configuration data from at least a first external device via the volatile memory interface during at least a first operating condition when the AC mains input power is not applied to the lighting device, and further
to continuously receive dimming control data from the at least first external device during a second operating condition when the AC mains input power is applied to the lighting device; and
a controller configured to generate output current reference signals for regulating the output current from the driving circuit during the second operating condition, said reference signals corresponding to the device configuration data and the dimming control data.

US Pat. No. 10,362,644

FLYBACK CONVERTER WITH LOAD CONDITION CONTROL CIRCUIT

Universal Lighting Techno...

1. A drive circuit for providing stability over a wide load range, the drive circuit comprising:an isolation transformer including a primary winding and a secondary winding;
a primary side circuit coupled to the primary winding of the isolation transformer;
a secondary side circuit coupled to the secondary winding, the secondary side circuit having first and second output terminals for coupling to a primary load; and
a load control circuit responsive to a load condition and configured to selectively apply an auxiliary load across the first and second output terminals,
wherein the isolation transformer is maintained in continuous operating mode, and
wherein the load control circuit comprises
an auxiliary load circuit for supplementing the load when the load is in a low load condition,
an output voltage sensing circuit for sensing an output voltage and bypassing the auxiliary load circuit when the load is in a high load condition, and
an input voltage sensing circuit for sensing whether the drive circuit is in a power off condition.

US Pat. No. 10,362,652

LIGHTING DEVICE WITH DIMMING REFERENCE CONTROL METHOD TO STABILIZE LOW OUTPUT CURRENT

Universal Lighting Techno...

1. A lighting device comprising:a power stage comprising one or more switching elements and configured to generate an output current to a lighting mode based on a regulated switching operation; and
control circuitry configured to generate control signals for regulating the switching operation of the power stage based at least in part on a feedback signal regarding the output current and a reference signal,
wherein the control circuitry is further configured
to define each of an upper boundary and a lower boundary as offset values with respect to a measured average control value, the offset values respectively extending linearly from a minimum control value to a maximum control value,
wherein each of the upper boundary and the lower boundary are defined corresponding to a difference between a current control value and the maximum control value, and linearly and progressively approach the control value as the control value increases, and
the control circuitry is further configured to enable adjustments to the reference signal only when changes to the control value exceed the upper boundary or the lower boundary.

US Pat. No. 10,356,873

MULTIPLE INTERFACE LED DRIVER WITH INHERENT OVERVOLTAGE PROTECTION

Universal Lighting Techno...

1. A lighting device comprising:a driving circuit configured to convert AC mains input power into an output current for driving a lighting load;
first and second terminals configured to receive corresponding terminals from any one of an analog dimming device, a digital dimming device or a driver configuration device;
an analog and digital interface circuit coupled to the first and second terminals and configured to receive dimming control signals from the analog dimming device or the digital dimming device when coupled thereto;
a driver configuration circuit coupled to the first and second terminals and configured to receive device configuration data from the driver configuration device when coupled thereto; and
a controller configured to
automatically detect whether one of the analog dimming device, the digital dimming device or the driver configuration device is coupled to the first and second terminals,
enable a corresponding one of the analog and digital interface circuit or the driver configuration circuit, and
generate output current reference signals for regulating the output current from the driving circuit, said reference signals corresponding to the received dimming control signals via the analog and digital interface circuit.