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US20150022087 METHOD AND APPARATUS FOR PROVIDING SUPPLEMENTAL POWER IN A LED DRIVER  
A DC current driver includes a DC current drive circuit configured to provide a DC supply current and receive a DC return current. A switch is coupled in series with the DC return current, and a...
US20110089840 Ultalow-Power Illumination Method and Apparatus  
An ultra-low power illumination apparatus and method providing a useful, low-level illumination source for highlighting objects, navigating, making beacons, glowing toys, or marking pathways in...
US20120086345 SOLID STATE LIGHT SYSTEM WITH BROADBAND OPTICAL COMMUNICATION CAPABILITY  
Systems and methods are disclosed for use in conjunction with a standardized electrical connector of a conventional light bulb or tube with one or more light emitting diodes (LEDs) electrically...
US20100295467 CIRCUIT ARRANGEMENT AND METHOD FOR REGULATING THE CURRENT THROUGH AT LEAST ONE DISCHARGE LAMP  
A circuit arrangement for the closed-loop control of the current through at least one discharge lamp may include a control loop including: a setpoint value input for supplying a setpoint value; an...
US20090295306 LED DRIVE CIRCUIT  
Provided is an LED drive circuit capable of using a switching regulator IC having low breakdown voltage even when a power supply voltage is high. The LED drive circuit includes a voltage clamp...
US20090184656 BACKLIGHT SYSTEM HAVING A LAMP CURRENT BALANCE AND FEEDBACK MECHANISM AND RELATED METHOD THEREOF  
A lamp current balance and feedback system and related method are disclosed for balancing the input and output currents of a lamp by making use of a lamp current balance and feedback mechanism....
US20090218961 POWER SENSING IN A FLASHLIGHT  
A flashlight includes a battery and a circuit for operation to signal to a user that the battery voltage is at selected voltage or power level. There can be two switches each being for operating a...
US20150181675 POWER FACTOR CORRECTION CIRCUIT, OPERATING DEVICE FOR A LIGHT-EMITTING MEANS AND METHOD FOR CONTROLLING A POWER FACTOR CORRECTION CIRCUIT  
A power factor correction circuit (11) comprises an input for receiving an input voltage (UIN), an inductance (21) coupled to the input, a switching means (24) that is coupled to the inductance...
US20100301766 OPERATING DEVICE FOR OPERATING A LIGHT SOURCE, IN PARTICULAR LED  
The invention relates to an operating device for operating an LED light source. The device includes a first power converter stage (P1) supplied with mains voltage with a first reference potential...
US20090001903 Backligth module having detecting circuit and direct current voltage compensation circuit  
An exemplary backlight module includes lamps (21), a power supply circuit (20), a detecting circuit (22), and a direct current voltage compensation circuit (23). The power supply circuit is...
US20120146540 METHOD AND APPARATUS TO CONTROL LED BRIGHTNESS  
Method and apparatus to control LED brightness are disclosed. An example method includes receiving a dimmer control signal; determining a cutoff point of the dimmer control signal; determining the...
US20070145912 Multi-mode flashlight  
A lighting device includes one or more light sources, one or more switches, and a controller. The lighting device has multiple modes of operation. The controller selects modes of operation...
US20100026204 ORGANIC LIGHT EMITTING DIODE ARRANGEMENT  
Organic light emitting diode arrangement Organic light emitting diode arrangements (1) are, to protect them against an effect of a switch-on, provided with circuits (31-36) for, during a first...
US20080272709 THREE-WAY DIMMING BALLAST CIRCUIT  
A three-way dimming ballast circuit for driving a ballast power switching circuit powering a gas discharge lamp such as a CFL. The circuit includes a driver circuit for driving high and low side...
US20110050116 ELECTRONIC BALLAST DEVICE AND OPERATION METHOD THEREOF  
An electronic ballast device includes a stabilizer and a sweep frequency circuit for preheating. The stabilizer includes a first input terminal, a second input terminal and an output terminal...
US20050242751 Inverter circuit with a power factor corrector  
The present invention provides an inverter circuit with a power factor corrector. A power source provides a power signal of alternating current. An electromagnetic interference filtering unit and...
US20090167203 AC-powered, microprocessor-based, dimming LED power supply  
A dimmable, light-emitting diode (LED) power supply adapted to provide a direct current (DC), constant current (“constant current source”) from a conventional, phase-controlled 120 VAC, 60 Hz...
US20110001435 System and Method For Controlling an Output Illumination Level of a Lighting System  
A method of controlling a brightness level of an LED by supplying power to an LED in series with a field effect transistor and a resistor. A first voltage is supplied from a digital potentiometer...
US20090001901 ULTRAVIOLET LAMP SYSTEM AND METHOD FOR CONTROLLING EMITTED UV LIGHT  
An ultraviolet lamp assembly and corresponding methods is operable to generate ultraviolet light for irradiating a substrate.. The lamp assembly includes a magnetron, an electrodeless lamp for...
US20110018907 PROCESSING CIRCUIT AND ELECTRONIC SYSTEM UTILIZING THE SAME  
A processing circuit coupled to a controlling circuit and including a first capacitor module, a second capacitor, a detection module, a first processing module, and a second processing module is...
US20100314048 ADJUSTING CURRENT RATIOS IN INDUCTIVELY COUPLED PLASMA PROCESSING SYSTEMS  
A plasma processing system for generating plasma to process at least a wafer. The plasma processing system may include a first coil for conducting a first current for sustaining at least a first...
US20100315019 LED DRIVER CIRCUIT AND METHOD, AND SYSTEM AND METHOD FOR ESTIMATING THE JUNCTION TEMPERATURE OF A LIGHT EMITTING DIODE  
A driver circuit (10) for a light emitting diode comprises a first driver circuit (32, 32′, 32′) for generating a first current output for driving the light emitting diode, wherein the first...
US20090021384 Method of Sampling a Modulated Signal Driven Channel  
An automated method of sampling an electrical condition of each of a plurality channels, the method comprising: driving each of the plurality of channels with a modulated signal; providing a...
US20110101868 REPLACEABLE LIGHTING UNIT WITH ADJUSTABLE OUTPUT INTENSITY AND OPTIONAL CAPABILITY FOR REPORTING USAGE INFORMATION, AND METHOD OF OPERATING SAME  
A lighting unit includes a power supply, a light source, a controller, and an output intensity adjustment mechanism. The adjustment mechanism is configured to allow a user to set an output...
US20100264314 Lighting Techniques for Wirelessly Controlling Lighting Elements  
Disclosed are lighting techniques, including systems, apparatus, and methods, that employ optical transmission of two-dimensional control signals to manipulate lighting elements. The lighting...
US20100264313 Lighting Techniques for Wirelessly Controlling Lighting Elements  
Disclosed are lighting techniques, including systems, apparatus, and methods, that employ optical transmission of two-dimensional control signals to manipulate lighting elements. The lighting...
US20080074059 Application of Microsystems for Lighting Control  
An arrangement includes a plurality of microsystems and a controller. Each of the plurality of wireless microsystems is operable to measure at least one parameter of a space, and to transmit the...
US20090200956 POWER SUPPLY CIRCUIT AND PORTABLE DEVICE  
A power supply circuit has a charge pump (CHP) step-up circuit including multiple CHP units for stepping up a given power supply voltage to a step-up voltage higher than the power supply voltage,...
US20100244725 MULTIPLE DOPANT EMISSIVE LAYER OLEDS  
An organic light emitting device comprising, an anode, a cathode, and an emissive layer, located between the anode and the cathode, of a host compound, a first compound capable of phosphorescent...
US20080272711 Apparatus and Method for Eliminating Electric Arc  
The present invention relates to an apparatus and a method for eliminating electric arc in the field of lighting electronics. Whether or not electric arc is likely to be produced is determined...
US20100283406 BI-DIRECTION CONSTANT CURRENT DEVICE  
An LED lamp includes a bi-direction constant current device coupled between a power supply and a LED load to provide stable positive and negative currents to the LED load. The bi-direction...
US20090289575 Opto-Isolator Multi-Voltage Detection Circuit  
An opto-isolator multi-voltage detection circuit is capable to handle a wide range of input voltages ranging from about 9 volts DC to about 240 volts AC includes an input voltage, an...
US20050237007 ELECTRONIC ALTERNATING-CURRENT REGULATOR  
An electronic alternating-current regulator for supplying a high-voltage direct current for activating a discharging light tube for steady illumination comprises a power circuit, a voltage control...
US20120049758 DRIVER CIRCUIT FOR DRIVING LIGHT-EMITTING ELEMENTS  
A driver circuit is configured to drive light-emitting elements. The driver circuit includes a light-emitting element, a power switching element, a control circuit, and a charge pump circuit. The...
US20100124067 CONTROL MODULE FOR A LIGHTING SYSTEM, LIGHTING SYSTEM AND LIGHT MODULE FOR A LIGHTING SYSTEM  
The present invention relates to a control module (30) for a lighting system, which lighting system (10) comprises a base module (11) with at least two parallel electrodes (16) and at least one...
US20150002049 Light Emitting Diode Driver with Linearly Controlled Driving Circuit  
A driver circuit for a lighting apparatus includes a current regulator configured to supply a load current to a load, and a control circuit coupled to the current regulator and configured to...
US20090184657 BACKLIGHT APPARATUS  
The invention discloses a backlight apparatus. The backlight apparatus includes a power source, a lamp, a balance transformer, a detecting circuit, a judging module, and a controlling module. The...
US20100060191 ELECTRIC-DISCHARGE-LAMP LIGHTING APPARATUS  
An electric-discharge-lamp lighting apparatus including: an inverter that converts a DC voltage to a high-frequency voltage; an insulating transformer for low voltage with a primary winding...
US20100164383 METHOD OF DRIVING A DISCHARGE LAMP, DRIVING ARRANGEMENT, AN PROJECTOR SYSTEM  
The invention describes a method of driving a discharge lamp (1), wherein a blackening value (N) is determined, which blackening value (N) represents a level of blackening of the interior of the...
US20120020131 POWER APPARATUS AND METHOD OF SUPPLYING POWER  
The present invention provides a power apparatus, which includes a switch unit, a bleeder resistor, a filter, a rectifier, a power factor corrector, an output capacitor, a rectifying diode, a...
US20090230880 DRIVING CIRCUIT AND METHOD FOR LIGHT EMITTING DIODE  
A driving circuit for a light emitting diode (LED) and a method thereof are provided. The driving circuit includes a voltage converting circuit and a reference voltage generator. The reference...
US20060132060 Power saving method and apparatus for electronic device  
A power-saving apparatus and a power-saving method are disclosed for electronic device. A power-saving program is stored in the electronic device and is activated to a detecting and stand-by...
US20100013402 System And Method For Controlling A Matrix Of Light Emitting Diodes And Light Provided Therewith  
A system and method for controlling a matrix of light emitting diodes (LED) connected to an input line comprises a power converter for connecting to the matrix of LEDs and to the input line...
US20090206769 Smart Load Control Device Having a Rotary Actuator  
A load control device for controlling the amount of power delivered from an AC power source to an electrical load comprises a rotary actuator, such as a rotary knob or a rotary wheel. The load...
US20100060192 Circuit for Driving Light Sources and Related Method  
A circuit for supplying a light source (L) such as a high flux (HF) LED with Pulse Width Modulation (PWM) dimming capability includes: a rectifier (10) for receiving an input bipolar PWM modulated...
US20080136348 LIGHT-EMITTING DISPLAY ARCHITECTURE  
A light-emitting display driver architecture and a method of supplying power and data thereto are disclosed. The driver architecture includes a wire interface with a host controller electrically...
US20110164071 PIXEL CIRCUIT, ORGANIC ELECTRO-LUMINESCENT DISPLAY APPARATUS, AND METHOD OF DRIVING THE SAME  
A pixel circuit includes a light emitting device, an N-type driving transistor for outputting a driving current according to a voltage applied to the gate electrode, a first capacitor coupled to a...
US20100001659 SEMICONDUCTOR LIGHT SOURCE DRIVING APPARATUS AND SEMICONDUCTOR LIGHT SOURCE DRIVING METHOD  
The semiconductor light source driving apparatus has: a semiconductor light source that is driven by a current; a voltage source that drives the semiconductor light source; an output voltage...
US20090200957 ILLUMINATION APPARATUS  
The present invention relates to an illumination apparatus comprising an LED light source which includes an LED chip and a sealing member containing a fluorescent material therein and sealing the...
US20060202637 DRIVING CIRCUIT AND METHOD OF TUNING A DRIVING VOLTAGE OF A LIGHT-EMITTING DEVICE UTILIZING A FEEDBACK MECHANISM  
A driving circuit and method for driving a light-emitting device. The driver circuit includes a first bias circuit coupled to an output node of a first light-emitting device for providing a bias...