LED lighting device and lighting equipment

Systems and methods for dimming control with capacitive loads

Circuit arrangement and method for operating a light source, in particular, a light-emitting diode

Light-emitting device, display device, light-emitting system, and display system

Bootstrap startup and assist circuit

Lighting device for solid-state light source and illumination apparatus including same

Back light unit and display device including the same

Dimmer for light emitting diodes and fluorescent bulbs

Multi-mode portable lighting device

Lighting power supply device

Constant current power supply apparatus

Driver for a solid state lamp

Illumination apparatus

LED driving circuit and LED driving controller

Load control device for high-efficiency loads

Two-peak current control for flyback voltage converters

LED driver for powering an LED unit from a electronic transformer

Driving controller and full-bridge converting circuit

Illumination system

Adaptive frequency control to change a light output level

Lighting device, and headlight lighting device, headlight, and vehicle using same

Method of driving light source, light source module for performing the method and display apparatus having the light source module

LED emitting device and driving method thereof

Systems and methods for driving light emitting diodes

Switch control circuit, switch controlling method, and power supply device using the switch control circuit

Light emitting element driving circuit, light emitting device, display device, and light emission controlling method

Load driving device and electronic device using the same

Lighting system, electronic device for a lighting system and method for operating the electronic device

LED driver with end-of-life detection circuitry

Method and apparatus providing deep dimming of solid state lighting systems

LED driving apparatus and LED lighting apparatus

Dimming of LED driver

LED driver and lighting application for wattage control

LED driving control circuit and LED driving circuit

Light-emitting device

Current regulating circuit of light emitting diode (LED) string and LED illumination device

LED lighting device and illumination apparatus including same

Switching parameter based discontinuous mode-critical conduction mode transition

Ramp controlled driver for series/parallel solid state lighting devices

3-way, phase-cut dimmable LED driver

Light-emitting diode driving circuit capable of controlling current of light-emitting diode on a full time basis

Circuit configuration for operating LEDs for a micromirror arrangement

Light emitting diode driver having phase control mechanism

Light emitting diode driver having cascode structure

Power regulation of LED by means of an average value of the LED current and bidirectional counter

LED drive circuit and LED illumination apparatus

Light source temperature monitor and control

Apparatus and method for circuit configuration for powering light emitting diodes

LED work light

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

PWM signal generating circuit for DC-DC converter using dimming signal and LED driving circuit having the same in direct digital dimming method

Duty factor probing of a triac-based dimmer

Circuit for operating parallel light emitting diode strings

Controlled power dissipation in a link path in a lighting system

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

Driver for cooperating with a wall dimmer

Lighting device and illumination apparatus using same

Synchronous regulation for LED string driver

Wireless power inverter for lighting

Method and device for programming a microcontroller

Pulsed indication unit for vehicle

Power saving arrangement for use with a user implementable phase cut dimmer

Generation from phase cut dimmer output with fast response to changes in dimmer position

Illumination system having color temperature control and method for controlling the same

Mechanisms for anti-flickering

Field equipment photoelectric sensing sensitivity adjustment

Power conversion and control systems and methods for solid-state lighting

Apparatus and methods for supplying power

LED driver with adaptive dynamic headroom voltage control

Light-emitting element driving device

Lighting wall switch with power failure capability

Light dimming control

DC power source unit and LED lamp system

Circuit and method for driving LED lamp with a dimmer

Multi-mode dimmer interfacing including attach state control

Off-grid LED power failure lights

System for driving a lamp

Integrated circuit switching power supply controller with selectable buck mode operation

Secondary-side alternating energy transfer control with inverted reference and LED-derived power supply

Multiple power sources for a switching power converter controller

Transformerless resonant boost supply circuit

Backlight module and an LCD thereof

Power supply control system with power factor improvement circuits and electronic device equipped with this system

Electrical system using high frequency AC and having inductively connected loads, and related power supplies and luminaires

Switching power supply device, switching power supply circuit, and electrical equipment

Current sensing for LED drivers

Step-up converter for light-emitting diodes (LEDs)

Multi power supply apparatus for driving light emitting diodes

LED based lighting application

Adaptive power factor correction for a lighting load circuit

Dynamic loading of power supplies

Wireless supplyable lighting module

Dimmer circuit for electronic loads

Current regulator drive circuit shunting current by voltage-dividing load

Voltage-converter arrangement and method for voltage conversion

Luminary control systems

Backlight assembly having current detection circuit and display apparatus having the same

Driving circuit and method for driving current-driven devices and electronic device applying the same

Modular illumination device

Backlight unit, method for driving the same, and liquid crystal display device using the same

Phase controlled dimming LED driver system and method thereof

Method and circuit for controlling an LED load

LED driver and driving method

LED thermal management

LED power-supply detection and control

Controllable-load circuit for use with a load control device

Power supply and display apparatus having the same

Driver circuit with an increased power factor

Power supplies for LED light fixtures

Harmonic compensation circuit and method for an LED light unit

Dimmer decoder with low duty cycle handling for use with LED drivers

Controller circuitry for light emitting diodes

Power supply device, lamp fitting, and vehicle

Compact converter plug for LED light strings

Dim range enhancement for LED driver connected to phase-cut dimmer

LED lighting device

Low current thyristor-based dimming

Dual voltage and current control feedback loop for an optical sensor system

Device and method for dimming light sources

Compensation method and circuit for line rejection enhancement

Electronic control to regulate power for solid-state lighting and methods thereof

High efficiency lighting device including one or more solid state light emitters, and method of lighting

Light emitting diode assembly

Lighting device having boost circuitry

System and method for sequential driving of information handling system display backlight LED strings

Light emission control circuit, light emission control method, flat illuminating device, and liquid crystal display device having the same device

Circuit for providing power to two or more strings of LEDs

Light-emitting diode lighting system with automatic bleeder current control

Light emitting device and production method therefor

Voltage compensation driving circuit

Two-wire dimmer operation

Appliance illumination with zero standby power

Dim-to-warm LED circuit

LED lighting methods and apparatus

Linear solid-state lighting with multiple switches

Horticulture facilities with centralized power supplies for powering LED luminaires via power transfer switches

Circuit for controlling delivery of an electrical signal to one or more light-emitting diode strings

Light emitting diode circuit with accurate current monitoring of two or more different LED strings

Negative voltage rail

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

Lighting system

Digital standby control of a lighting driver using peak detection of pulse width modulated output reference control signal

Light string with a non-extinguishing function and an independent LED blinking function

Hybrid driving scheme for RGB color tuning

LED driving circuits

Power converter control using calculated average current

Method for step dimming

Dimmer circuit for use in light-emitting diode lighting system

Backlight device and dimming control method thereof

Smart dimming system

Light control circuit and optical encoder system

Driver circuit supplying positive and negative voltages and control circuit and control method thereof

PWM signal control circuit for driving chip and LED driving chip for automotive reading lamp

LED dimming load sudden change suppression circuit

Dimming control of lighting modules

Driver circuit for LED light

Isolated dimming circuit

Lighting device with output buffer circuit for stability during no-load or standby operation

Universal input-voltage-compatible switched-mode power supply

Negative charge pump doubling output voltage range for step-up LED driver

Filter LED lamp arrangement

Electrically isolated system and method for digital regulation of a programmable lighting device

Lighting device with dimming reference control method to stabilize low output current

Multiple interface LED driver with inherent overvoltage protection

Control signal switching system

Light-emitting diode lighting system with automatic bleeder current control

Circuit and method for indirect primary-side load current sensing in an isolated power supply

Light emitting device driver circuit and control method thereof

Resonant converter with pre-charging circuit for startup protection

Flyback converter with load condition control circuit

Power supply for a two-wire smart switch and lighting loads thereof

Method and apparatus for sequencing outputs in a multi-output power converter system

Light control circuit and optical encoder system

Control method and apparatus for extending runtime on a portable lighting device

Light emitting diode control circuit with hysteretic control and low-side output current sensing

Constant current linear driver with high power factor

Reducing jitter in a direct AC LED lighting device

Method of forming a power supply control circuit and structure therefor

Dimmable LED light fixture maintaining brightness during color temperature change

Light emitting diode driver for load changes

Adaptive LED light

Signal communication for circuit with floating ground

Lighting driver, lighting system and control method

Voltage regulation circuit for LED tube

Individual LED short circuit detection

Electronic driver with electric-leakage protection for LED lighting

Apparatus and method for linearization of the control inputs for a dual output resonant converter

Low standby power control circuit for LED driver

Adjustable light color temperature switching circuit

Dual pathway LED dimmer

Light emitting diode light device

Lighting system and method for dynamically regulating driven current to an analog or digital dimming interface

Primary-side regulated current control system under LLC topology

Aircraft escape slide lighting system with self-regulated, circuit-protected luminaires

Burst operation of a switching controller having a plurality of foldback curves

Trimming system and method for regulated current mirrors

Radiation tolerant, analog latch peak current mode control for power converters

Multifunctional universal LED driver

Dimmable single-stage power converter with adaptive switching frequency control

LED dimming

LED dimming

Resonant inductive coupling extension cord for light emitting diodes

Low-cost LED driving circuit using high voltage

Dynamic AC impedance stabilization in a flyback LED driver

LED straight tube lamps

Feedback circuit

Phase-cut dimmable power supply with high power factor

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

High efficiency flicker attenuator for lighting

Phase-cut dimming circuit with wide input voltage

Unpowered tuning interface circuit for an LED driver

Ballast compatibility buffer circuit for LED lamps

Switching mode constant current LED driver

Light emitting diode bulb, control system and apparatus

Multi-phase power supplies for light fixtures

Dual mode constant current LED driver

Circuit and method for LED current regulation and ripple control

Toilet seat lighting apparatus

Helmet with energy attachment

Energy attachment for a helmet

Constant power output from emergency battery packs

Techniques for providing environmental lighting using network infrastructure

Techniques for providing environmental lighting using network infrastructure

Controller for a power converter

Multicolored tube light with improved LED array

Methods for adjusting the light output of illumination systems

Silicon controllable dimming full-range flickfree circuit

Light fixture with internally-loaded multilayer stack for pressure transfer

Light-emitting device for providing flash light source

System having a driver with voltage supply using an auxiliary winding of a transformer

Flicker-free dimming circuit for non-point light source

Control method to avoid capacitive mode switching for resonant converters

LED device

Boost converter design with 100%-pass mode for WLED backlight and camera flash applications

2-D lamp with integrated thermal management and near-ideal light pattern

Light fixture providing multiple switchable brightness levels

Apparatus, systems and methods for average current control in a buck DC/DC LED driver

Apparatus, systems and methods for average current and frequency control in a synchronous buck DC/DC LED driver

Visible light communication enabling lighting driver

Modular light control device and dimming control system

Systems and methods for intelligent control related to triac dimmers by using modulation signals

LED driver systems adapted for gang boxes

Secondary-side bucking and current-stabilizing flyback power converter

Current source regulation

Tunable LED

Semi-dual-active-bridge converter system and methods thereof

Dimmer configured for providing sinking and sourcing current outputs

Audible noise reduction method for multiple LED channel systems

LED driver with offline tuning interface using hot and neutral inputs

Combined wireless voltage controlled dimming interface for an LED driver

Dimmable switching mode LED driving circuit without phase angle measurement

Negative current sensing method for multi-channel LED driver

LED lamp arrangement adapted to replace fluorescent lamp in luminaire with ballast

LED driver providing constant output power across a wide output voltage and current range

Kind of LED phase cut dimming power supply

Primary current sensing method for isolated LED driver

Photosensor employing a fiber optic collector

Integrated LED driver for wireless communication

Circuit and method for eliminating power-off flash for LED drivers

Current control circuits

Dimmable LED driving system and method for reducing flicker

Light-emitting diode headlight driver

LED driver circuit with step configurable output

Current control circuits

Self-healing overtemp circuits in LED lighting systems

Constant current and temperature compensation control device for outdoor spotlights used on laser stages

LED light with power switch controlled color temperature

Light tube and power supply circuit

Energy saving under-cabinet lighting system using light emitting diodes with a USB port

Multifunction DC to DC driver

Variable bleeder circuit

Power conversion apparatus for decreasing number of pins

Operation method for LED dimming device

Wireless remote control circuit

Apparatus and methods for LED control

Precision color-controlled light source

Switched capacitor LED matrix driver

Temperature protection circuit for light-emitting diodes

Non-linear lighting system brightness control for a user device

Vehicle indicator circuit having controlled backlighting

Sub-assembly for searchlight signal, and associated assembly

Switch current control to shape input current

Output tuning and dimming interface for an LED driver

Input surge protection circuit and method for a non-isolated buck-boost LED driver

Dimmable switching mode LED driving circuit without phase angle measurement

LED driver circuits

Tubular light emitting diode lighting device having selectable light output

Circuit and method for abnormal fault testing in an LED driver

System and method for a switched-mode power supply

LED light source and circuit for driving the same

Device and method for removing transient and drift from an AC main supplied to a DC-controlled LED load

Illumination device and method for independently controlling power delivered to a load from dimmers having dissimilar phase-cut dimming angles

Methods and apparatus of incandescent bulb emulator

Illumination device

Light emitting diode backlight module and driving apparatus thereof

Offline tuning interface for LED drivers

Electronic driver for controlling an illumination device

Electronic driver for an illumination device and method of operating thereof

LED control circuit