Matches 1 - 50 out of 371 1 2 3 4 5 6 7 8 >


Match Document Document Title
9006991 State cycling apparatus and method, and control circuit for a lamp  
A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal...
9000678 Reduced flicker AC LED lamp with separately shortable sections of an LED string  
An LED lamp with an integrated circuit, a rectifier, and a string of series-connected LEDs rectifies an incoming AC signal. The integrated circuit includes power switches that can separately and...
8987998 LED flourescent lamp  
An LED fluorescent lamp includes: an LED array having a plurality of LEDs connected in series; a first connection pin and a third connection pin connected to one side of the LED array; a second...
8970121 Driving device, light-emitting device and projector  
A driving device includes a power source that converts input power to output power, first and second capacitors connected to an output of the power source, a load selector, and a capacitor...
8872426 Arrangements and methods for triac dimming of gas discharge lamps powered by electronic ballasts  
An apparatus for powering and TRIAC dimming of a gas discharge lamp includes an electronic ballast for powering a gas discharge lamp from a TRIAC based dimmer connected to an AC line, an EMI...
8836239 LED lighting device and illumination apparatus including same  
An LED lighting device includes a converter for converting a power source voltage into a DC voltage and outputting it to an LED unit; and a controller for controlling an output of the converter....
8823281 System and method for providing both power and control to circuits coupled serially to a single conductor  
To power and control multiple different electronic circuit nodes, this document introduces a single-wire multiple-circuit power and control system. Specifically, individually controlled circuit...
8779677 Circuit arrangement and method for operating a light source, in particular, a light-emitting diode  
A circuit arrangement for driving a light source, in particular, a light-emitting diode, comprises a first adjustable current path (1), that connects a terminal (BAT_IN) for a battery to a...
8704454 Integrated driver system architecture for light emitting diodes (LEDs)  
A method includes forming one or more capacitors over a substrate. The method also includes forming a transformer at least partially over the substrate. The transformer is adjacent to at least one...
8629631 Method and system for improving start-up time of a light emitting diode (LED) driver at reduced input voltage  
Improving start-up time of a light emitting diode (led) driver at lower input voltage is accomplished with a quick start circuit comprising a constant current source that replaces the traditional...
8508146 Electronic device, control circuit, and method for controlling light emitting element  
An electronic device including a light emitting element. A capacitor is coupled to the light emitting element. A measurement circuit measures a change amount in charge of the capacitor. A control...
8492986 LED circuit arrangement with improved flicker performance  
A circuit arrangement (1) for a light emitting device, comprising a first circuit branch (2) for receiving an AC voltage and comprising a first light emitting diode (LED) circuit (3) serially...
8456098 Method and apparatus for efficiently powering digital electronic nodes on a single conductor current line  
Direct current circuits always require a voltage source consisting of a positive voltage and a ground. To power a plurality of a direct current circuit nodes one must traditionally supply a power...
8334659 Electronic driver dimming control using ramped pulsed modulation for large area solid-state OLEDs  
An electronic driver apparatus and methods are disclosed for driving power an organic LED or other large area solid state light source, in which a switch mode DC current source provides DC current...
8305010 Light-emitting diode lighting device with step-down chopper  
There is provided an LED lighting device having a satisfactory temperature characteristic and a small amount of variation in output current. The step-down chopper is provided with a first circuit...
8283876 Circuit for driving an infrared transmitter LED with temperature compensation  
Systems and methods to achieve a circuit for driving one or more infrared transmitter LEDs with temperature compensation have been disclosed. In a preferred embodiment of the invention the circuit...
8247990 Apparatus, method, and system for improved switching methods for power adjustments in light sources  
An apparatus, method, and system for switch control of power to light sources, particularly high power consumption light sources that may experience lumen depreciation, such that the power level...
8217588 Adaptive dimmable LED lamp  
A low voltage LED Lamp produces variable illumination in response to industry standard lighting dimmers, through the use of an input voltage monitoring circuit which variably controls the current...
8143793 Device and method for periodic diode actuation  
An energy efficient illumination device is provided in which energy consumption is reduced by using a pulse generating circuit which provides power to LEDs in short pulses, and in which the...
8089213 LED fluorescent lamp  
Provided is a light-emitting diode (LED) fluorescent lamp using as light sources a plurality of LEDs, which are eco-friendly and can contribute to power conservation. The LED fluorescent lamp...
8067926 Power supply for a load control device  
A power supply for a load control device generates a DC voltage and provides an asymmetrical output current, while drawing a substantially symmetrical input current. The power supply comprises a...
8013536 Inverter circuit  
From the individual small areas of a conductor pattern arranged on the back side of a circuit board, there are individually extended leader patterns, which are midway led by through holes to the...
7982404 Method and apparatus and system for adjusting power to HID lamp to control level of light output and conserve energy (ballast multi-tap power output)  
One aspect of the present invention is a non-electronic method of controlling the power provided to the lamp through use of multiple secondary taps off the secondary side of the HID ballast. This...
7960922 High efficiency low power capacitor charged DC driver  
A high efficiency low power DC driver apparatus is presented for powering a light source, with a capacitive divider circuit receiving an AC input and providing a divided AC output, a rectifier...
7952294 Apparatus, system and method for cascaded power conversion  
An apparatus method and system are provided for power conversion, to supply power to a nonlinear load such as a plurality of light emitting diodes. An exemplary apparatus comprises a first power...
7952299 Control circuit and method for self-exciting capacitor charging circuit  
A first voltage comparator makes a comparison between a first detection voltage that occurs at one terminal of a first resistor and a predetermined first threshold voltage. A second voltage...
7919928 Boost LED driver not using output capacitor and blocking diode  
An LED driver is disclosed that boosts an input voltage to drive any number of LEDs in series. The driver includes a switch-mode current regulator that supplies regulated current pulses to the...
7791285 High efficiency AC LED driver circuit  
In an AC drive circuit for LEDs, a current limiting capacitor connects to an AC source, a first circuit portion, including a first rectifying diode and a first power capacitor, connects between...
7586270 Circuit and method for the operation of miniature high pressure short-arc lamps using alternating current  
An embodiment of the invention is concerned with a circuit and a method for the generation and operation of the plasmas in High Pressure Short Arc Lamps having miniature dimensions using...
7453214 Lamp-operating unit and low-pressure mercury discharge lamp  
The present invention aims to provide an inrush current limiting resistor for suppressing inrush current, and to avoid an excessive current flowing through the inrush current limiting resistor...
7279849 Apparatus for driving backlight of liquid crystal display  
This invention relates to a backlight driving apparatus of a liquid crystal display device, and more particularly to a backlight driving apparatus of a liquid crystal display device that includes:...
7242149 Lamp driving circuit with floating power supply driver  
A lamp driving circuit with a floating power supply driver includes a microcomputing unit, a floating power supply driver, and a driving unit. The microcomputing unit and the floating power supply...
7129650 Lighting apparatus for high intensity discharge lamp  
A lighting apparatus of high intensity discharge lamp comprises a DC power source, a series connection of a first and a second transistors; a series connection of a first and a second capacitors...
7049756 Capacitive load driving circuit, capacitive load driving method, and apparatus using the same  
A capacitive load driving circuit (1) for charging and discharging a capacitive load (11) is provided with a voltage divider (5) for dividing a power supply voltage (VH) into a plurality of...
7042167 Back light device for liquid crystal displays  
Disclosed herein is a back light device for LCDs. The back light device includes an inverter to supply an alternating current or a pulse, a plurality of fluorescent lamps to radiate visible light,...
7009346 Driving an EL panel without DC bias  
An inverter is coupled to an EL lamp by a high pass filter including a series capacitor and a shunt resistor. The resistor is coupled in parallel with the EL lamp. The high pass filter has a time...
6960891 Direct-type back light device  
The object of this invention is to provide a direct-type back light device, capable of maintaining uniform luminance, and reducing manufacturing costs and power consumption, in addition to being...
6856101 Method and apparatus for switching of parallel capacitors in an HID bi-level dimming system using voltage suppression  
Switching of parallel capacitors in an HID bi-level lighting control system is accomplished through use of transient voltage suppression across an electronic relay for discharge of residual charge...
6597128 Remote discharge lamp ignition circuitry  
A starter circuit is provided for starting an HID lamp. The circuit de-couples the high voltage starting pulse from the input lines (ballast output lines) so that the starter can function properly...
6566822 Electronic circuits for detecting filament breakage in gas discharge lamps  
Disconnection device for an electronic operating device for gas discharge lamps. The DC component is evaluated at a coupling capacitor (C5) specifically via a filament. Disconnection is performed...
6515433 Gas discharge fluorescent device  
Sputtering of the cathodes of a cold cathode fluorescent lamp is reduced or eliminated by removing electrodes altogether from the sealed envelope containing the gaseous medium. Electric field is...
6414447 Discharge lamp lighting device and illuminating device  
A combination-type high frequency inverter connects an isolation leakage transformer, a smoothing condenser, a resonance condenser, a first field-effect transistor and a second field-effect...
6337543 High power cold cathode gas discharge lamp using sub-electrode structures  
A high power cold cathode gas discharge system employs two electrode structures, where each structure includes a plurality of sub-electrodes connected in parallel to a driver so that the current...
6335596 Control device of a flash type movable decorating lamp  
A control device of a flash type movable decorating lamp comprises a high voltage converting circuit, an actuating circuit, a high voltage storage capacitor, a flash displaying circuit and other...
6326738 Two wire light for electronic displays  
An apparatus for illuminating an electronic display such as an LCD. A single hot wire is connected to multiple capacitors each dedicated to a cold cathode fluorescent tube, and multiple tubes are...
6232724 Light emitting diode array  
An LED array composed of a plurality of LEDs is disposed on either side of a signal interconnection board, while metal plates are disposed on the other side of the signal interconnection board as...
6147459 Voltage-controlled ballast for gas-discharge lamps  
An electronic, externally controlled ballast has a control oscillator which feeds a fluorescent lamp via an invertor bridge and a resonant circuit. To keep the voltage constant, there are derived...
6111364 Method and device to inhibit the flash photography of a vehicle  
A device and method that inhibits the ability of photographic equipment from obtaining a recognizable picture upon its recording media, of areas of a vehicle equipped with this invention. The...
6031340 Device and method for capacitive bi-level switching of high intensity discharge lighting  
A zero current crossing capacitive switching scheme for controlling the switching of a capacitor into and out of an HID lead ballast circuit at a time when a current through the capacitor is at or...
5973447 Gridless ion source for the vacuum processing of materials  
Plasma beam apparatus and method for the purpose of vacuum processing temperature sensitive materials at high discharge power and high processing rates. A gridless, closed or non-closed...

Matches 1 - 50 out of 371 1 2 3 4 5 6 7 8 >