Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 8188674 | LED light emitting device and driving method thereof The present invention relates to an LED light emitting device and a driving method, and discloses a technology that may improve a slew rate of a channel current flowing through an LED channel when driving with a pulse width modulation method. For this, the present i... | 05/29/2012 |
| 8188673 | 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 time interval that follows a switch-on, limiting a c... | 05/29/2012 |
| 8164269 | Discharge lamp lighting device and lighting fixture One output power characteristic curve for supplying constant power is provided with respect to a raging voltage range of a discharge lamp, and in addition, a plurality of output power characteristic curves W1, W2 and W3 are provided with respect... | 04/24/2012 |
| 8154214 | Switching power supply for an illumination device with precision current control A system and method for powering a light-emitting element in an illumination device includes a DC power supply with the light-emitting element coupled across a positive output terminal and a negative output terminal of the DC power supply. A switching element is cou... | 04/10/2012 |
| 8154215 | Discharge lamp lighting apparatus In a discharge-lamp lighting apparatus, a switching frequency of an AC voltage applied to an LC series circuit including an inductor and a capacitor is swept near a frequency having a value provided by dividing the resonant frequency of the LC series circuit by an o... | 04/10/2012 |
| 8148909 | Driver system and method with multi-function protection for cold-cathode fluorescent lamp and external-electrode fluorescent lamp System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, conv... | 04/03/2012 |
| 8148910 | Differential driving circuit for powering a light source A differential driving circuit for powering a light source is disclosed. The differential driving circuit includes a first set of switches and a second set of switches. A first current from a power source flows through the first set of switches to charge a first ene... | 04/03/2012 |
| 8148908 | Power supply control device for lamp A power supply control device for lamp includes a control unit, the control unit receives a forward voltage signal and a reverse voltage signal simultaneously from a zero-crossover sampling circuit and determines if a connected load is an LED lamp, then the control ... | 04/03/2012 |
| 8143800 | Circuits and methods for driving a load with power factor correction function A circuit for driving a load includes a power line, converter circuitry, and a controller. The power line is operable for providing an input current and an input voltage. The converter circuitry coupled to the power line is operable for converting the input voltage ... | 03/27/2012 |
| 8129918 | Power supply, display device, and light source driving apparatus A power supply is provided, which includes a DC-DC converter being supplied with an external DC input voltage and a first switching control signal and outputting a duty sensing signal of which a magnitude is varied in accordance with the first switching control sign... | 03/06/2012 |
| 8125158 | Insulation type AC-DC converter and LED DC power supply device using the same In an insulation type AC-dc converter in which input current from a commercial power supply is converted to obtain insulated direct current, the overall efficiency is raised and the structure is simplified. A multi-resonance type half-bridge DC-DC converter having a... | 02/28/2012 |
| 8120270 | Circuit arrangement and method for operating a discharge lamp with preheatable electrodes A circuit arrangement for operating a discharge lamp (LA) with preheatable electrodes comprising: an input terminal for applying an input voltage (UE); an output terminal for providing an output voltage (UA) to a lamp generator (LG) for operati... | 02/21/2012 |
| 8106597 | High efficiency boost LED driver with output A current driver for powering a string of LEDs has a boost converter coupled to an input voltage source. A voltage multiplier circuit is coupled to the boost converter and to the string of LEDs. A latch is provided having an output coupled to the boost converter. A ... | 01/31/2012 |
| 8067896 | Digitally controlled current regulator for high power solid state lighting An exemplary apparatus embodiment provides for controlling current supplied to solid state lighting, such as light emitting diodes. An exemplary apparatus comprises a memory adapted to store a plurality of current parameters; and a control circuit adapted to modulat... | 11/29/2011 |
| 8040072 | Power supply and plasma display including the same A power supply including a transformer primary coil coupled to an input power source and a secondary coil coupled to an output terminal, a first switch coupled to the primary coil of the transformer, a duty cycle of the first switch controlling a voltage of the outp... | 10/18/2011 |
| 8030853 | Circuit and method for improving the performance of a light emitting diode (LED) driver A circuit includes a driver configured to generate an output for driving one or more light emitting diodes. The circuit also includes a voltage booster configured to boost an input voltage provided to the driver when the voltage booster is coupled to a high-frequenc... | 10/04/2011 |
| 8004203 | Electronic light generating element with power circuit The present system for driving an electronic light generating element, includes: (i) input terminals, (ii) an input circuit coupled to the input terminals and operable to convert a sinusoidal signal to a signal independent of negative current attributes, (iii) a swi... | 08/23/2011 |
| 7999484 | Method and apparatus for controlling current supplied to electronic devices The present invention provides a drive and control apparatus provides a desired switched current to a load including a string of one or more electronic devices. A voltage conversion means, based on an input control signal converts the magnitude of the voltage from t... | 08/16/2011 |
| 7999485 | Electrical device The present invention is directed to a power control wiring device that includes an electronic switch circuit that energizes the electrical load in accordance with a timing regulation signal. A timing regulation circuit includes a primary timing regulation circuit a... | 08/16/2011 |
| 7994731 | Universal input voltage device A universal input voltage device is presented which may receive a wide range of regulated and unregulated input voltages, both DC and a wide range of variable frequency AC, and output a desired regulated current at a desired voltage independent of the fluctuation of... | 08/09/2011 |
| 7990070 | LED power source and DC-DC converter Isolated LED power sources and DC-DC converters therefor are presented in which the DC-DC converter includes a self-oscillating inverter driving an output rectifier for operating an LED array of one or more LEDs, where the inverter uses a control transformer with co... | 08/02/2011 |
| 7977890 | Direct current power supply device, power supply device for driving LED and semiconductor integrated circuit for controlling power supply Disclosed is a direct-current power supply device, including: an inductor; a switching element to intermittently supply a current to the inductor; an external terminal to which an output current of an external unit is fed back; a control circuit to generate a pulse ... | 07/12/2011 |
| 7977889 | Direct-current power supply device, power supply device for driving LED and semiconductor integrated circuit for driving power supply Disclosed is a direct-current power supply device, including: an inductor; a switching element to intermittently supply a current to the inductor; an output terminal connected to an external unit; a rectifying element connected between the inductor and the output te... | 07/12/2011 |
| 7952297 | Driving device for providing light dimming control of light-emitting element A driving device includes a first switch element to switch between applying or not applying to a light-emitting element a voltage directed to setting the light-emitting element in an ON state, and a constant current control circuit to adjust a current flowing throug... | 05/31/2011 |
| 7948188 | Light emitting diode illuminating apparatus with adjustable luminance A light emitting diode (LED) illuminating apparatus (100) includes a controller (20) and an illuminating member (10). The controller is configured for setting a luminance of the LED illuminating apparatus and creating a luminance level value acc... | 05/24/2011 |
| 7932679 | Method of forming an LED system In one embodiment, an LED system is controlled to have a substantially unity power factor. ... | 04/26/2011 |
| 7919929 | Lamp driving device having impedance component detecting abnormal discharge In one aspect, an impedance component which exhibits a high impedance in a high frequency region is arranged on a high pressure line formed on a secondary side of a transformer. The potential difference generated at both ends of the impedance component is used to de... | 04/05/2011 |
| 7911151 | Single driver for multiple light emitting diodes A LED driver circuit (70, 80) employs a power source (IS, VS) for providing power at a power conversion frequency to a switching LED cell (30-32, 40-42). The switching LED cell (30-32, 40-42) switches between a radiat... | 03/22/2011 |
| 7898187 | Circuit and method for average-current regulation of light emitting diodes A regulator regulates one or more light emitting diodes (LEDs) so as to control an average current through the LEDs. The regulator could include a transistor switch that can couple the LEDs to ground. The regulator could also include circuitry that controls the tran... | 03/01/2011 |
| 7880401 | Lighting controlling device of vehicle lighting equipment A lighting controlling device of vehicle lighting equipment includes switching regulators for supplying a current to a plurality of semiconductor light sources respectively; a plurality of current driving portions, having switching elements connected to the semicond... | 02/01/2011 |
| 7880400 | Digital driver apparatus, method and system for solid state lighting An apparatus, method and system are provided for controlling the solid state lighting, such as LEDs. An exemplary apparatus comprises: a switch for switching electrical current through the LEDs, a current sensor; a first comparator adapted to determine when a switch... | 02/01/2011 |
| 7863828 | Power supply DC voltage offset detector A power supply output voltage direct current (DC) offset detector determines a DC offset in a power supply output voltage signal, and the output voltage signal has a DC component and an alternating current (AC) “ripple” component. Once during each period of the ... | 01/04/2011 |
| 7852014 | Method and cell for controlling the power factor of a power supply line A method and system controls the power factor associated with a power supply line. The system includes a control circuit having a power factor control cell connected to the power supply line. The power factor control is performed by modulating the conduction time of... | 12/14/2010 |
| 7825606 | Fluorescent lamp driver power A kind of fluorescent lamp driver power consists of a multi-switch converting circuit, a power transformer, a resonant inductor, a resonant capacitor, a step-up transformer and a rectifier. The primary winding of the power transformer connects with an AC output of m... | 11/02/2010 |
| 7825607 | D-c to d-c converter circuit A d-c to d-c converter circuit (DDCC) (10) that is comprised of a passive thin-film hybrid circuit that includes an input circuit (12), a voltage regulator circuit (14), a comparator circuit (16), an oscillator circuit (18) and an ... | 11/02/2010 |
| 7795820 | Emulation circuit An emulation circuit is disclosed for connection to a low energy lamp energized by an AC supply and substituted for an incandescent lamp in a traffic signal installation. The circuit comprises means for sensing the magnitude of a supply voltage applied to energize t... | 09/14/2010 |
| 7777424 | Method and apparatus for controlling an input voltage to a light emitting diode A method and apparatus for controlling an input voltage to a light emitting diode (LED) is disclosed. In one embodiment a system for controlling an input voltage to at least one LED includes an energy storage device. The energy storage device is coupled to the at le... | 08/17/2010 |
| 7772782 | Light emitting diode (LED) driving device A light emitting diode (LED) driving device includes a power factor correction (PFC) circuit, a bridge switch circuit, a resonant circuit, a transformer and a feedback circuit. The PFC circuit adjusts an output signal thereof based on a feedback signal. The bridge s... | 08/10/2010 |
| 7759876 | LED lighting apparatus A light comprising a housing, a plurality of LED lights coupled in an array inside of the housing, and a reflective protrusion coupled to the housing wherein the reflective protrusion is for reflecting light from the LED lights out of the housing. The housing can be... | 07/20/2010 |
| 7750580 | Dimmable, high power factor ballast for gas discharge lamps A ballast for operating a compact fluorescent lamp includes a power factor correction circuit and an energy storage capacitor coupled to the output thereof. The power factor correction circuit is configured to draw current from an AC power source during substantiall... | 07/06/2010 |
