Match Document Document Title
8937432 Light source having LED arrays for direct operation in alternating current network and production method therefor  
To allow a direct connection of a light source to a 230V/50 Hz or 120V/60 Hz AC network and to ensure safe operation and easy adaptation to user requirements when mounting, the light source...
8933637 AC/DC power converter  
In one embodiment, an AC/DC power converter can include: a rectifier bridge and a filter capacitor for converting an external AC voltage to a half-sinusoid DC input voltage; a first storage...
8901843 Light driving apparatus and method thereof  
A light driving apparatus includes a first rectifying unit for receiving AC power and rectifying the AC power into DC, a switching element controlled to turn on or off by a control signal, a...
8896207 Fluorescent light fixture assembly with LED lighting element and converter modules  
The present invention is directed to a fluorescent light fixture assembly including a ballast and a novel lighting element that includes an array of LEDs and at least one converter module that...
8786203 Variable effect light spring  
A light system that is controllable to generate a plurality of selected lighting effects, the light system includes a main processor, the main processor being in communication with a plurality of...
8754584 SCR dimming circuit and method  
The present invention relates to a silicon-controlled rectifier (SCR) dimming circuit and method for regulating the luminance of a light-emitting diode (LED) load. In one embodiment, an SCR...
8736185 SCR dimming circuit and method  
The present invention relates to an SCR dimming circuit and method for regulating the luminance of an LED load. In one embodiment, an SCR dimming circuit can include: an SCR element that generates...
RE44806 Electrical adapter for medical diagnostic instruments using LEDs as illumination sources  
An adapter for permitting a medical diagnostic instrument having an illumination source including at least one LED (light emitting diode) to be used with a power supply normally configured for use...
8674612 Fluorescent tube driving device  
A fluorescent tube driving device including a first voltage converter, a second voltage converter, an oscillating unit, an inverter, an adjusting unit, a switching unit and a voltage stabilizing...
8624520 Electrical appliance having a lighting device having light emitting diodes  
An electrical appliance, particularly a television or a monitor, having a lighting device (8) having light emitting diodes (12). The light emitting diodes (LED) (12) are collected in LED strings...
8502462 Voltage detection module  
The voltage detection module according to the invention comprises: a first electric terminal; a second ground terminal; a load resistor, connected to the first electric terminal; a main gas-filled...
8487555 Bi-level lamp ballast  
A bi-level lamp ballast to selectively operate two lamps is provided. The ballast includes a control circuit having an input, connected to a switching network, and an output, which provides a...
8471484 Reversed-polarity pulse generating circuit for direct current plasma and direct current plasma power supply unit  
A capacitor is connected between direct current voltage terminals, and inductance means is connected between one end of the capacitor and one of load terminals. In a case in which the direct...
8415889 LED lighting equipment  
Certain embodiments provide an LED lighting equipment including a lighting main body. An LED power device has a DC power source and a DC-DC converter having an input terminal connected to the DC...
8373347 Variable effect light string  
A light system that is controllable to generate a plurality of selected lighting effects, the light system includes a main processor, the main processor being in communication with a plurality of...
8274229 Reverse polarity series type LED and drive circuit  
The present invention of a reverse polarity series type LED is formed by two sets of LED and diode assemblies in reverse polarity series connection wherein the first set is consisted of at least...
8267554 Light emitting diode device  
A light emitting diode (LED) device comprises a base and a cover packaging of a rectifier diode chip and a light emitting diode chip connecting in series with a metal wire. The LED device can be...
8198819 3-way LED bulb  
Circuits to make a 3-way LED light bulb correctly interface to a standard 3-way light socket, producing three levels of light corresponding to the three settings of the socket. One of the circuits...
8134298 Decorative light string device  
The present invention discloses a decorative light string device, which comprises: a power plug receiving AC power, a tail socket coupled to the power plug, and a LED string with one end thereof...
8115402 Method and apparatus for driving multiple parallel discharge lamps  
The present invention provides a method and apparatus for driving multiple parallel discharge lamps, which increases the switching frequency once the open lamp condition is detected to provide an...
8049428 Uni-directional light emitting diode drive circuit in pulsed power series resonance  
The present invention is disclosed by that the series connected capacitive impedance and inductive impedance are powered by a pulsed power, thereby to produce the bi-directional divided power in...
7986101 Variable effect light string  
A light system that is controllable to generate a plurality of selected lighting effects, the light system includes a main processor, the main processor being in communication with a plurality of...
7956547 Dielectric barrier discharge lamp lighting device  
A dielectric barrier discharge lamp (14) has an inside electrode (142) in a tube axis direction within the airtight container (141), which has ultraviolet transmission properties and a long tube...
7863831 AC illumination apparatus with amplitude partitioning  
A method includes rectifying AC power and controlling switching of first, second and third currents from and rectified power and a switching sequence that is locked to the AC cycle time by sensing...
7679292 LED lights with matched AC voltage using rectified circuitry  
An LED light string employs a plurality of LEDs wired in block series-parallel, where the one or more series blocks, each driven at the same input voltage or rectified AC input voltage as the...
7609006 LED light string with split bridge rectifier and thermistor fuse  
A string of lights has an electrical plug at one end and a receptacle at the other end and plural light-emitting diodes (LEDs) in series with a negative temperature coefficient (NTC) thermistor....
7576337 Power supply for an ion implantation system  
A power supply system for an ion implantation system. In one particular exemplary embodiment, the system may be realized as a power supply system that includes a low frequency power inverter, a...
7545102 Single-stage electronic ballast device  
A single-stage electronic ballast device outputs a square wave current to drive an HID lamp, which includes a rectifying and power factor correction unit, a bridge converter and a controller...
7518316 Half-wave rectification circuit with a low-pass filter for LED light strings  
Disclosed is a low cost LED string circuit design that uses an inexpensive half-wave rectification and low-pass filter circuit that is designed to produce minimal flicker in the LED string that is...
7453215 Illumination system having cold cathode started, illumination controlled gas discharge lamps in series  
An illumination system having cold cathode started, illumination controlled gas discharge lamps in series, includes the parts of a voltage-adjustable full-wave voltage-doubler rectifier power...
7449839 Structure of LED lighting chain  
A LED lighting chain is disclosed to include a front plug, a rear plug, an AC-DC converter formed of four rectifying diodes, and a LED serial set, wherein the LED serial set has a voltage dropping...
7276858 Decorative lighting string with stacked rectification  
An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing...
7164237 Circuit arrangement for operating discharge lamps  
A DC-AC converter in a half bridge configuration is used for operation with high pressure discharge lamps as well as low pressure discharge lamps. The converter consists in two switches (T1-T2)...
6949889 Wide input voltage range light emitting diode driver  
A current-regulating driver circuit for a light emitting diode (LED) maintains energization drive to and thereby illumination provided by the LED at a prescribed, substantially constant value,...
6630799 Resonant power supply and apparatus for producing vacuum arc discharges  
The present invention relates to a vacuum arc discharge power supply. The power supply may be a high frequency resonant AC supply or it may be rectified to give resonant DC. The power supply of...
6501228 Full-wave driving circuit for multiple electroluminescent cells  
A full-wave driving circuit for multiple electroluminescent lamps includes circuitry at a collective first end of the electroluminescent lamps for boosting of both positive and negative waves, and...
6462485 EL driver for small semiconductor die  
A driver for an EL lamp includes a voltage boost circuit and an H-bridge output having an AC diagonal and a DC diagonal. An EL lamp is coupled across the AC diagonal. A current path is coupled in...
6459216 Multiple CCFL current balancing scheme for single controller topologies  
The multiple lamp circuit for minimizing lamp current imbalance comprises at least one transformer comprising primary windings and secondary windings. Multiple lamps are coupled in serial to the...
6211625 Electronic ballast with over-voltage protection  
In an electronic ballast, a rapid start fluorescent lamp is powered by being parallel-connected with the tank-capacitor of a series-resonant LC circuit. Beating power for the lamp's cathodes is...
6204609 Enhanced inverter for powering an EL lamp  
A power supply for an EL lamp includes a boost circuit and four semiconductor switches connected as a bridge having an AC diagonal and a DC diagonal having one end grounded. The voltage boost...
6172464 Compact screw-in fluorescent lamp  
In a high-frequency electronic ballast, a fluorescent lamp is connected with and powered by way of a series-resonant LC circuit. A resistive load is connected with the LC circuit, thereby to...
6166492 Low loss, electronic ballast  
A low loss capacitive delivery system for converting a low voltage AC power source into a driving energy for a high voltage lamp is disclosed. The system involves delivering two energy loops with...
6150761 Discharge lamp ballast circuit with charge pump igniter  
A ballast for a compact fluorescent lamp includes a down-converter for operating the lamp with a DC current during stable operation and a charge pump for igniting the lamp. The converter includes...
6121733 Controlled inverter-type fluorescent lamp ballast  
Unfiltered full-wave-rectified 60 Hz power line voltage is supplied to a first self-oscillating series-resonance-loaded inverter, the high frequency output current from which is...
6118225 High frequency discharge lamp operating circuit with resonant power factor correction circuit  
A circuit arrangement comprising a DC-AC converter for operating a lamp (La). A first capacitor is connected across first and second inputs of the DC-AC converter. A first coil and a second...
6100645 Ballast having a reactive feedback circuit  
A circuit for energizing a load includes an inverter which provides a feedback signal to a rectifier for substantially linear operation of the rectifying diodes. In one embodiment, a ballast...
6100642 Discharge lamp operating electronic device for improving the reliability, efficiency, and life of a hot-cathode discharge lamp  
A discharge lamp operating electronic device is provided with a booster circuit for converting the direct-current power provided by a direct-current power supply to a predetermined operating...
6091208 Lamp ignitor for starting conventional hid lamps and for starting and restarting hid lamps with hot restrike capability  
An ignitor is provided to predictably and reliably start a conventional HID lamp, or to start or restart an HID lamp having a hot strike capability such as a high pressure xenon HPS lamp or...
6091206 Electronic ballast system for fluorescent lamps  
Electronic ballast system for fluorescent lights. A power oscillator connected to the primary winding of a power transformer for operation at a predetermined frequency in the range of 10 KHz to 5...
6043610 Battery operated power supply including a low level boost and a high level boost  
An EL lamp is driven by a power supply including a voltage boost circuit and a low power inverter. The boost circuit includes a level shifting capacitor to provide voltage doubling. The inverter...