Methods, apparatuses, and systems for operating light emitting diodes at low temperature

Lighting apparatus

Multi-Stages Power Supplying Control Circuit for Light Emitting Diode

LED driver and LED driving method

Lighting device, illumination device, and lighting fixture

Battery powered light source for compartment illumination

System and method for achieving precise regulation of multiple outputs in a multi-resonant LED driver stage

LED lighting device

Light-emitting diode lighting device having multiple driving stages and line/load regulation control

Sequential Linear LED System With Low Output Ripple

Light driver and the controller and driving method thereof

Lighting apparatus and dimming regulation circuit thereof

Retrofit LED lighting system with circuit level enhancement

Lighting circuits, luminaries and methods compatible with phase-cut mains supplies

Low flicker LED driving circuit with high power factor

Multipath current source switching device

Lighting apparatus comprising a control device and aircraft comprising the lighting apparatus

LED controller

Solid state lighting apparatuses, circuits, methods, and computer program products providing targeted spectral power distribution output using pulse width modulation control

Purely resistive dimming circuit

Standby power for LED drivers

Circuit arrangement and led lamp comprising the same

CURRENT ADJUSTING DEVICE AND ADJUSTMENT METHOD THEREOF

Driving apparatus and method for dimmable LED

Driving device

Lighting Control System and Method

LED driver circuit having efficiency-improving function

Lighting device

HIGH UTILIZATION LED DRIVER

LED luminescence apparatus

LED lighting apparatus comprising an energy storage module and method for operating the LED lighting apparatus

Organic light-emitting element

Light emitting device driving apparatus and illumination system including the same

SYSTEM AND METHOD FOR POWERING AND CONTROLLING A SOLID STATE LIGHTING UNIT

Light emitting diode driving system with carrier signal control

Lighting Control System Using Input Voltage Dependent Control

Auxiliary power supply for AC powered electronics

Status indicating light unit and aircraft comprising the same

Circuit for compensating bipolar junction transistor base current and LED driving apparatus having the same

Apparatus for controlling on and off states of light emitting diode lamp

Lighting device having LED elements

Digitally-controlled switch-mode start-up circuit with dimmer compatibility for LED-based lights

Light-emitting diode (LED) driver, LED lighting apparatus, and method of operating LED lighting apparatus

Backlight control circuit with flexible configuration

Controlled function light emitting diode lighting device and method

Digitally-controlled switch-mode start-up circuit for LED-based lights

Light-emitting diode lighting device with adjustable color rendering indexes

High-efficiency, wide dynamic range dimming for solid-state lighting

LED driving apparatus and driving method for continuously driving LED

AC-powered LED light engine

High voltage converter without auxiliary winding

Systems and methods for current matching of LED channels

Capacitance amplifying circuit applied to a controller of a power convertor and operation method thereof

GAUUSIAN SURFACE LENS QUANTUM PHOTON CONVERTER AND METHODS OF CONTROLLING LED COLOUR AND INTENSITY

AC LED driving circuit

Multiple stage sequential current regulator

Single stage LED driver system, control circuit and associated control method

LOW-FLICKER LIGHT-EMITTING DIODE LIGHTING DEVICE HAVING MULTIPLE DRIVING STAGES

LIGHTING SYSTEM WITH BUILT-IN INTELLIGENCE

A DEVICE AND SYTEM FOR LED LINEAR FLUORESCENT TUBE LAMP DRIVER

Light emitting device including light emitting diode and driving method thereof

AC direct drive LED power supply capable of handling overvoltage

Optoelectronic component device

Light source driving apparatus for controlling the operating mode of a backlight in response to changes in the dropout voltage of the current control transistor

Load drive circuit, load drive method, and luminaire

Non-linear system control methods

Solid state lighting device and method for operating the same

Pulse current LED driving circuit

LED drive circuit

Light source circuitry for controlling the color of emitted light

Device for controlling a plurality of sets of LEDs, especially for an automotive vehicle

ADJUSTABLE CONTROL FOR BI-LEVEL LUMINAIRE DRIVER

LED-BASED LIGHTING APPARATUS WITH LOW FLICKER

Three-terminal LED and drive circuit thereof

Bi-level dimming controller for LED light fixture

Light emitting system and voltage conversion device thereof

Dynamically reconfigurable LED drivers and lighting systems

Controlling current flowing through LEDs in a LED light fixture

Battery powered light source for compartment illumination

Photocontrol for luminaire consumes very low power

Driving circuit with dimming controller for driving light sources

Ceiling lamp adopting non-separating driver circuit

Light emitting diode driver with linearly controlled driving current

Driving device for illuminating device, illuminating device and luminaire, driving device having distributed inductance

LED LIGHT SOURCE

Techniques for assessing condition of leds and power supply

Light-emitting circuit with variable resistor element, and light-emitting module and illumination device including the same

High efficiency led driver and driving method thereof

Lighting systems with uniform LED brightness

LED lighting device

Auxiliary power supply for lighting driver circuitry

Lighting driver having multiple dimming interfaces

INFRARED EMITTING DIODE DRIVING CIRCUIT AND REMOTE CONTROL

Circuit Arrangement and Method for Operating an LED Chain on AC Voltage

Lighting module

Driving device

Driver system for driving at least one LED

Constant current source circuit and a sampling circuit

Controlling an LED string using a current sink with low side voltage regulation

Near unity power factor long life low cost LED lamp retrofit system and method

System and method for controlling maximum output drive voltage of solid state lighting device

Light-emitting device package and light-emitting apparatus

Linear LED Driver

LED linear regulator circuit with improved power factor

Half- or quarter-cycle current regulator for non-isolated, line voltage L.E.D. ballast circuits

Liquid crystal display, LED backlight source, and the driving method thereof

Dimmable LED reading light unit, arrangement of power supply and dimmable LED reading light unit, method of operating a dimmable LED reading light unit in a power supply system and method of replacing a dimmable light unit by a dimmable LED reading light unit

Light emission module

LED lighting system driven at high voltage DC

High efficiency LED driver and driving method thereof

LED controlling circuit with high power factor and an LED lighting device

LINEARLY DIMMING CIRCUIT OF LIGHT-EMITTING DEVICE AND METHOD THEREOF

Dimmable LED illuminating system, driver of the illuminating system, and method of driving the illuminating system

Linear bypass electrical circuit for driving LED strings

Current driver for LED diodes

Self-adaptive LED fluorescent lamp

Device for improving compatibility of solid state light sources with phase-cut dimmers

Voltage control circuit with temperature compensation function

Light source device with light-emitting diode module

Current regulator

LED drive circuit

LED illuminating method and apparatus for image measuring device

Light emitting apparatus

AVERAGE LINEAR LED DRIVER CIRCUIT

Power-saving driver circuit for providing a bias current or driving a current-driven load

LED light source

LED light source

POWER DISTRIBUTION SYSTEM AND METHOD FOR LED LIGHTING

Light emitting element drive circuit

Active current limiting for lighting apparatus

PFC LED driver capable of reducing flicker

Dimming apparatus for LEDs

Drive device for light-emitting element

Method of driving a light emitting device

LED backlight driving circuit, backlight module, and LCD device

Driver device and driving method for driving a load, in particular an LED unit

Solid-state lighting apparatus and methods using switched energy storage

Circuit arrangement for operating at least a first and a second cascade of LEDs

Device and method for controlling current to solid state lighting circuit

LED driver circuit

Constant current driving device having an improved accuracy

LED driver circuit and method

Linear bypass electrical circuit for driving LED strings

LED AC driving circuit capable of adjusting operating voltage

Emergency lighting with charging indicator circuitry

High efficiency LED driver and driving method thereof

LED driver circuit and light apparatus having the same in

Driving circuits for solid-state lighting apparatus with high voltage LED components and related methods

Bi-level dimming controller for LED light fixture

Driving circuits for light emitting elements

Driving circuits for light emitting elements

Light emitting diode driving integrated circuit with a multi-step current setting function and method of setting a multi-step current of a light emitting diode driving integrated circuit

Light emitting diode lighting apparatus

LED emitting device and driving method thereof

Multi-current source and method for regulating current

Detector controlled illuminating system

LED backlight driving circuit for LCD panels

Indicator drive circuit

LED driver circuit

Controlled power dissipation in a lighting system

PWM signal generating circuit for DC-DC converter using dimming signal and LED driver circuit using the same in digital PWM method having fixed phase mode

Thermal management in a lighting system using multiple, controlled power dissipation circuits

Multichip package structure for directly electrically connecting to an AC power source

Dimmable light source with temperature shift

Power systems for driving light emitting diodes and associated methods of control

Method and apparatus for controlling brightness of light emitting diodes

Backlight control circuit with flexible configuration

Circuit for providing power to two or more strings of LEDs

Circuit for LED illumination driving current linear adjustment and dimming control

Switched-mode control circuit for correlated color temperature based on linear drive LED lighting

Lighting system

Multi-string LED drivers and current switching techniques

Apparatus and methods for converter mode and load configuration control

Hybrid driving scheme for RGB color tuning

Power offloading for linear current source

Load bypass slew control techniques

Circuit and method for linear constant current control and LED device

Constant current linear driver with high power factor

Light-emitting device with digital control of color temperature modulation and application thereof

Plug structure of light emitting AC electric power cord

Pulse modulation for isolated auxiliary voltage and dimming signal transfer over single opto-isolator

Current regulator

Adjustable light color temperature switching circuit

Color-tunable lighting device and method

Low-flicker light-emitting diode lighting device

Input voltage sense circuit for boost power factor correction in isolated power supplies

Linear constant current LED driver circuit in active valley-fill circuit mode

Light emitting diode driving circuit with stable driving current

High efficiency flicker attenuator for lighting

Phase-cut dimming circuit with wide input voltage

Unpowered tuning interface circuit for an LED driver

LED control circuit and method therefor

Dual input voltage constant power indicator

Redundant power for lighting system

LED device with energy compensation

High performance linear LED driving circuit

Constant voltage output AC phase dimmable LED driver

Method and apparatus for correcting for power harmonics

Method and apparatus for controlling light output from a LED lamp

Auxiliary power supply with dynamically adjustable output

LED driver with offline tuning interface using hot and neutral inputs

Kind of pulse width dimming control circuit for LED phase cut dimming power supply

Low current LED fixture internal auxiliary power supply

LED light with power switch controlled color temperature

Light emitting diode dimmer circuit

Illumination device

LED lighting

Low power photocontrol for luminaire

Light emitting diode linear light modulator with temperature compensation

LED driver circuit with stepwise adjustable power and LED lighting tube

LED lighting device

Lighting system including a driving device for driving a lighting appliance

Power drive system of light-emitting diode strings

Power control system and method for providing an optimal power level to a designated light assembly

Integrated circuit with precision current source

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

Systems and methods for low-power lamp compatibility with an electronic transformer