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US20120074854 LIMITED FLICKER LIGHT EMITTING DIODE STRING  
A limited flicker decorative light-emitting diode (LED) string includes a power plug adapted to connect to an alternating current (AC) power source and supply AC power to the LED string, a first...
US20160128158 LED ENVIRONMENT ENGINE  
An environment engine with LED lighting is disclosed herein. According to one embodiment, a lighting system is disclosed having a sensor that detects a physical condition of a user. The physical...
US20130147373 Aircraft LED Washlight System and Method for Controlling Same  
A modular area washlight illumination system and method for operating are provided that comprise an intelligent light module group that has: one or more light modules, each of which comprises a...
US20060238136 Lamp and bulb for illumination and ambiance lighting  
An Edison-style light bulb (40) which supports a plurality of light emitting diodes (LEDs) (50) and an illumination source (54). First and second electrical circuits (56) and (58) are mounted in...
US20150382413 LED LAMP WITH VARIABLE INPUT POWER SUPPLY  
There is provided a light emitting diode apparatus for operation with varying input electrical sources. The apparatus comprises an array of light emitting diodes to produce light, and a variable...
US20130082611 FEED FORWARD CONTROLLED VOLTAGE TO CURRENT SOURCE FOR LED DRIVER  
A DC to DC converter receives a DC input voltage and generates an output DC voltage. A current sensor measures a DC input current. A control circuit is coupled to the current sensor for...
US20140197751 Spectral Shift Control for Dimmable AC LED Lighting  
Apparatus and associated methods involve operation of an LED light engine in which a relative intensities of selected wavelengths shift as a function of electrical excitation. In an illustrative...
US20140091718 Power Converter with an Inductor-Inductor-Capacitor Stage and Method of Operating the Same  
A power converter including an inductor-inductor-capacitor stage and method of operating the same. In one embodiment, the power converter includes an inductor-inductor-capacitor (LLC) stage...
US20130320869 ELECTROMAGNETIC BALLAST-COMPATIBLE LIGHTING DRIVER FOR LIGHT-EMITTING DIODE LAMP  
A lighting driver includes a shunt switch circuit configured to detect when an input of the lighting driver is connected to mains power without a ballast, and in response thereto to disable the...
US20110006688 LED LAMP DEVICE  
This invention relates to an LED lamp device which can be applicable to a socket of a general fluorescent lamp, a halogen lamp, an incandescent lamp or the like by embodying an LED illuminating...
US20110050110 APPARATUS AND METHOD OF DRIVING LED, SYSTEM FOR DRIVING LED USING THE SAME, AND LIQUID CRYSTAL DISPLAY APPARATUS INCLUDING THE SYSTEM  
The light emitting diode (LED) driving apparatus includes a channel driving unit configured to detect a pulse width of a pulse width modulation (PWM) signal, and configured to output n dimming...
US20150022102 Omni Voltage Direct Current Power Supply  
A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost...
US20150247630 LED Task Lighting System  
The disclosure provides an LED light system that is easy to install and customizable by the user. The LED lighting system may be plugged directly into an existing power source. In one...
US20110080397 BACKLIGHT DRIVE APPARATUS AND VIDEO DISPLAY APPARATUS  
A backlight drive apparatus for current driving a plurality of strings has a period in which at least one of the strings is a current driven idly during a liquid crystal OFF period, in addition to...
US20100026187 LUMINAIRE DRIVE CIRCUIT  
A luminaire drive circuit (1) comprises an AC to DC power supply (2) delivering DC power to rails (3), and a plurality of LED drive circuits (4) connected across the rails to receive DC power....
US20120126711 PLANAR LIGHT EMITTING DEVICE  
A sensor circuit or a display apparatus from which a highly accurate sensor output can be obtained includes a photodiode, a capacitor that is connected to the photodiode via an accumulation node...
US20100295460 LIGHT EMITTING DIODE CIRCUIT  
A light emitting diode (LED) circuit is provided. A light emitting diode (LED) circuit includes an alternating current (AC) source, a rectifier, a voltage-limiting circuit, and an LED module. The...
US20140049730 LED DRIVER WITH BOOST CONVERTER CURRENT CONTROL  
An electronic circuit includes a driver for an LED light, having an isolated DC-DC converter having a first output at a higher voltage referred to a floating ground and a second output at a lower...
US20120019156 LED STRING DRIVER WITH NON-DISSIPATIVE REACTANCE BALANCER  
A solid state lighting arrangement constituted of: a power source providing a current which is discontinuous in at least one direction; a plurality of light emitting diode (LED) strings arranged...
US20090026973 LIGHTING APPARATUS  
A lighting apparatus according to the present invention includes: a plurality of solid state light emitting devices; a holding unit which holds the plurality of solid state light emitting devices;...
US20160150615 METHOD AND APPARATUS FOR PROVIDING A PASSIVE COLOR CONTROL SCHEME USING BLUE AND RED EMITTERS  
A lighting device capable of generating warm or neutral white light using blue light-emitting diodes (“LEDs”), red LEDs, and/or luminescent material that responds to blue LED emission is...
US20150137688 LED DRIVER OPERATING FROM UNFILTERED MAINS ON A HALF-CYCLE BY HALF-CYCLE BASIS  
An analog electronic circuit for driving a string of LEDs including input terminals for accepting connection to AC voltage, a current regulation circuit operatively coupled to receive an AC...
US20120133290 IMAGE DISPLAY APPARATUS  
An image display apparatus includes a main body in which a display unit is disposed, and a backlight unit that is detachable from the main body and to which a plurality of LED modules are...
US20100141159 LED DRIVING CIRCUIT AND CONTROLLER WITH TEMPERATURE COMPENSATION THEREOF  
The present invention provides an LED driving circuit with temperature compensation, comprising a power transforming circuit, an LED module and a controller. The transforming circuit receives an...
US20150181666 ARRANGEMENT AND METHOD FOR CONTROLLING LIGHT-EMITTING DIODES IN ACCORDANCE WITH AN INPUT VOLTAGE LEVEL, BY MEANS OF A CAPACITOR AND SWITCH  
An arrangement and a method for controlling an array of light-emitting diodes includes a capacitor arranged in series with an electronic switch between one end of a first segment of the array and...
US20110210676 Public lighting device with high energetic efficiency  
Public lighting device with high energetic efficiency, including a casing (10, 12) for containing light sources, suitable to be connected with a support element, wherein the casing (10, 12)...
US20100295458 AC LED MODULE WITH AN IMPROVED POWER FACTOR  
An AC LED module with an improved power factor for coupling with an AC source includes a plurality of LED strings and a plurality of connecting-to-middle drive elements. The LED strings are...
US20140239809 DEVICES AND SYSTEMS HAVING AC LED CIRCUITS AND METHODS OF DRIVING THE SAME  
A lighting device and system having at least one circuit, the circuit having at least two LEDs connected in series, parallel or anti-parallel configuration and at least one current limiting diode....
US20140210347 AC LED LAMP  
An AC LED lamp includes first and second AC power ends, a lighting module and a DC power output circuit. The lighting module has first and second ends and an LED unit. The first end is connected...
US20130082603 LED Device with Simultaneous Open and Short Detection Function and Method Thereof  
An LED device with simultaneous open and short detection function includes a plurality of LED strings, a voltage converter, a current driving unit, a loop control unit and an open and short...
US20080258637 LIGHT EMITTING ELEMENT DRIVER AND CONTROL METHOD THEREFOR  
A method of controlling a light emitting element to compensate for reduced brightness includes accumulating a power-on time of the light emitting element and adjusting a light emitting element...
US20090141481 Array light source using led and backlight unit including the same  
Disclosed are an array light source using a light-emitting diode and a backlight unit including the same. In accordance with an embodiment of the present invention, the array light source can...
US20140159592 LED LIGHT TUBE COMPATIBLE WITH LIGHT FIXTURE HAVING ELECTRONIC BALLAST OR MAGNETIC BALLAST  
The LED light tube compatible with a light fixture having an ballast has a translucent tube and an LED light bar mounted in the translucent tube. and having at least one waveform conversion...
US20130285563 Power Supply Device, Luminaire, Control Method for the Power Supply Device, and Control Method for the Luminaire  
According to one embodiment, a control circuit detects power supply voltages converted by switching elements for conversion and subjects the switching elements for conversion to feedback control....
US20130257282 LED DRIVER AND A METHOD OF DRIVING LEDS  
A method of driving current from an AC power supply through a series arrangement of a varying number of strings of LEDs is disclosed, the method comprising, adding LED strings to the series...
US20130229119 Dimmable Solid State Lighting System, Apparatus and Method, with Distributed Control and Intelligent Remote Control  
Exemplary systems, methods and apparatuses for a distributed solid-state lighting system are disclosed. An exemplary system comprises a central power source, and one or more terminal lighting...
US20080297059 Led Control Circuit and Method  
A LED control circuit for controlling the activation scheme of a plurality of LED light sources in an in-vivo swallowable imaging capsule is presented, which is designed for efficient operation...
US20100269383 POWER MANAGEMENT SYSTEM CONTROLLER  
An apparatus and method provides for managing solar power to a LED illumination device such as a street sign so that the power from a power storage device is monitored and variations in applied...
US20100109535 LIGHT-EMITTING DEVICE  
A light-emitting device includes a light-emitting diode (LED) module, a detecting circuit and a control circuit. The light-emitting diode module receives a variable voltage. The detecting circuit...
US20160205730 CURRENT ROUTING TO MULTIPLE LED CIRCUITS  
An illumination module includes a plurality of Light Emitting Diodes (LEDs) located in different zones to preferentially illuminate different color converting surfaces. The flux emitted from LEDs...
US20110068700 Method and apparatus for driving multiple LED devices  
A series of methods of driving multiple LED devices with high efficiency balancing technique is disclosed. The regulation of the LED current is accomplished by switching operation to compensate...
US20110018451 Single Inductor Serial-Parallel LED Driver  
An LED driver circuit is disclosed that can drive a plurality of LED strings that are arranged in parallel, each LED string having a plurality of component LEDs that are series-connected. The LED...
US20070273296 LED light strings  
Light emitting diode (LED) lights are mixed with incandescent lights in a light string, e.g., for Christmas or other holiday season lighting. In an incandescent light string, such as a mini-light...
US20130221861 METHOD AND DEVICE FOR DRIVING AN LED STRING  
The invention relates to a method and a device for driving an LED string of a first LED segment (11) and at least one further LED segment (12, 13, 14) connected in series. Each LED segment has at...
US20120086349 Decorative Light System  
A light string includes a plurality of remote units and a control unit. Each of the plurality of remote units includes a microcontroller and is connected to a plurality of lights. Each...
US20090218952 COLOR-CHANGING LIGHT STRING  
A color-changing light string comprises a plurality of color-changing luminous bodies connected in series, driven by a rectifier circuit and controlled by a control switch, so that each of the...
US20160345396 METHOD OF DRIVING AT LEAST ONE LED STRING THEREOF  
The Light Emitting Diode (LED) lamp is adapted for mounting in a fluorescent tube mount having a selectively activatable magnetic ballast powering two pairs of sockets with AC power upon...
US20150208469 ILLUMINATION DEVICE CONTROL SYSTEMS AND METHODS  
In various embodiments, a converter for a lighting apparatus iteratively applies voltage to and senses current from the lighting apparatus to regulate operation thereof.
US20120176047 Lighting Apparatus and Light Emitting Diode Device Thereof  
The present invention provides a light emitting diode (LED) device. The LED device include a driver, a first LED coupled in series with the driver, and an impedance-providing component coupled in...
US20110031889 AC-POWERED LED LIGHTING SYSTEM  
The present invention relates to an AC-powered LED lighting system made in implementing AC-driven LED lightings that are achieved without the use of a dedicated circuit configuration such as SMPS,...

Matches 1 - 50 out of 153 1 2 3 4 >