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7619447 |
High voltage high side transistor driver
A high side transistor driver includes a sender module that generates a power input signal. A converter module receives the power input signal and generates an output signal that has a higher...
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7619372 |
Method and apparatus for driving a light emitting diode
An apparatus includes circuitry that responds to application to its input of an alternating current input signal by producing at its output an output signal suitable for driving an electronic light...
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7619371 |
Inverter for driving backlight devices in a large LCD panel
Two out-of-phase inverters are used for driving a backlight for large LCD panels. The lamp currents of each inverter are regulated to substantially the same level to ensure the same brightness in...
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7619370 |
Power allocation methods for lighting devices having multiple source spectrums, and apparatus employing same
Methods for allocating power amongst different source spectrums, or “channels,” of a multi-channel lighting unit, and apparatus that employ such methods. Power allocation methods exploit the...
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7619369 |
Method and circuit arrangement for operating a discharge lamp
A method and a circuit arrangement for operating a discharge lamp, in particular during the first hours of operation after lamp manufacture, are described. The method and the circuit arrangement...
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7619362 |
Outer jacket leak detection method and ballast implementing the method
A method of detecting a leak in an outer jacket of a metal halide lamp having an arc tube inside the outer jacket and operated by a ballast, where the ballast monitors an electrical characteristic...
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7615941 |
Apparatus and method for maximizing the longevity of arc tube bulbs during pulsing operation
Heating or powering a filament less light bulb, and preferably a High Intensity Discharge light sufficiently close to steady state temperature and then pulsing the current, thereby improving and or...
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7615940 |
Gate driver topology for maximum load efficiency
A circuit comprises a first input for receiving a supply voltage and a second input for receiving a sensed current signal from an output of a DC to DC converter. The circuit also includes an output...
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7615939 |
Spectrally calibratable multi-element RGB LED light source
An LED lighting system is disclosed. The lighting system includes means to calibrate the light temperature and intensity between multiple modules in one system, or to calibrate the light...
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7615938 |
Method and system for variable LED output in an electronic device
A waveform generator generates LED signal values that define an LED waveform and period. Each signal value is scaled by a particular scaling value to scale the amplitude of the LED waveform. The...
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7615937 |
High-pressure discharge lamp lighting device and lighting fixture
An object of the invention is to provide a high-pressure discharge lamp lighting device capable of executing dimming up to a lower luminous flux level than the dimming lower limit obtained by...
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7615933 |
Pulsed dielectric barrier discharge
A method of generating a fast-rise time voltage step to produce an overvoltage condition for a dielectric barrier plasma discharge involves providing a pair of electrodes spaced apart by an...
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7615931 |
Pulsed dielectric barrier discharge
A dielectric barrier plasma discharge device consistent with certain embodiments of the present invention has a pair of electrodes spaced apart by an electrode gap. A dielectric is disposed between...
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7613020 |
Discharge lamp ballast apparatus comprising DC/DC converters having at least two transformers and outputting two kinds of voltages
A discharge lamp ballast apparatus includes a DC/DC converter having a transformer T 1 and a DC/DC converter having a transformer T 2 , which are connected in parallel; a control section 4 for...
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7612506 |
Method for controlling light-emission of a light-emitting diode light source
A method for controlling light-emission of a light-emitting diode (LED) light source whose heat is dissipated by a thermal module is provided. The method includes following steps: providing a...
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7612505 |
Liquid crystal display backlight inverter
A LCD backlight inverter including: a dimming control unit comparing a level of a triangle wave with a level of a dimming control signal and controlling a dimming control current to be supplied or...
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7612504 |
Lamp with integral voltage converter having phase-controlled dimming circuit for reducing RMS load voltage
An incandescent lamp includes a lamp voltage conversion circuit within the lamp and connected to a lamp terminal, where the voltage conversion circuit converts a first line voltage at the lamp...
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7609098 |
Driver circuit for electronic components
A driver circuit including an amplifier, which generates a control signal from a reference signal; a driver current mirror; and a control current switch located between the amplifier and the driver...
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7609007 |
Dimmer adaptable to either two or three active wires
A dimmer ( 42 ) adaptable to either two (H, DH) or three (H, N, DH) active wires includes a first full-wave rectifier (D 1 , D 2 , D 3 , D 4 ) across an AC power hot (H) terminal and a dimmer hot...
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7605809 |
Driver and method for driving a semiconductor light emitting device array
A driver and method for driving a semiconductor light emitting device array is provided. The driver includes at least one current regulator unit having a plurality of controllable switches to...
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7605792 |
Driving method and circuit for automatic voltage output of active matrix organic light emitting device and data drive circuit using the same
Disclosed herein is a driving method and circuit for the automatic voltage output of an active matrix organic light emitting device, which is capable of resolving the non-uniformity of brightness...
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7605547 |
Addressable LED architecture
The present disclosure provides an addressable light emitting diodes (LED) architecture that is able to control a plurality of LEDs individually. The present disclosure further provides a method of...
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7605546 |
Discharge lamp lighting apparatus and semiconductor integrated circuit
A discharge lamp lighting apparatus includes a triangular signal oscillator, a first control part to compare the triangular signal with an error voltage between a reference voltage and a voltage...
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7605545 |
Control system for multiple fluorescent lamps
The present invention is directed to an apparatus that drives a lighting system with multiple lamps. A phase shift mechanism is produced either by a digital method, an analog method, or a mixture...
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7599107 |
Electro-optical device, electronic apparatus, and driving method
An electro-optical device includes a controller, a reference current source, a correction current source, a combining unit, and an electro-optical element. The controller generates a reference...
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7598859 |
Method and system for controlling lighting
A method and system for controlling lighting in a space reduces energy consumption of the light sources by changing at least one of the color rendering index (CRI) and the correlated color...
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7598684 |
Methods and apparatus for controlling devices in a networked lighting system
Methods and apparatus for computer-based control of light sources in a networked lighting system. In one example, a plurality of LED-based lighting systems are arranged as computer controllable...
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7598683 |
Control of light intensity using pulses of a fixed duration and frequency
A method and circuit to control the intensity of lights, illumination fixtures, and displays using pulses of a fixed duration and a fixed frequency (FD/FF) is provided. In particular, the method...
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7598682 |
Current regulator apparatus and methods
An apparatus according to the present invention provides regulated pulsed current to an LED from a voltage source such as a rectified AC voltage. The present inventions provide methods for...
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7598681 |
Methods and apparatus for controlling devices in a networked lighting system
Disclosed are various methods and apparatus for controlling illumination sources in a networked lighting system. For example, disclosed is an integrated circuit to control at least one illumination...
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7598680 |
Electronic power protection circuit and applications thereof
An electric power protection circuit connected in series to a secondary side circuit of a transformer in a switch mode power supply includes a voltage/current limiting device to get an electric...
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7598679 |
Integrated circuit capable of synchronization signal detection
A method according to one embodiment may include providing power to at least one light source. The method of this embodiment may also include detecting the frequency of at least one vertical...
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7598677 |
Multiple failure detection shutdown protection circuit for an electronic ballast
A shut-down circuit configured for use with an electronic ballast coupled to a lamp in a control path includes a device for sensing the electrical energy associated with the control path, and a...
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7595785 |
Display device and driving device for a light source
A light source portion for a liquid crystal display (LCD) device may prevent reduction of the life span of the multiple lamps (LPs) when a surrounding temperature of the multiple LPs is less than a...
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7595596 |
Power-saving control circuit and method for OLED panel
The present invention discloses a power-saving control circuit for an OLED panel, comprising: a plurality of OLEDs respectively located in a corresponding plurality of paths; a current amount...
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7595595 |
System and method for current and/or temperature control of light fixtures
A system ( 100 ) for current and/or temperature control of light fixtures includes a sensor ( 110 ) structured to be in communication with a light fixture ( 150 ), sense a current flow or a...
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7593241 |
Hybrid power supply system
A hybrid power supply system including piezoelectric and ferrite transformers for driving a discharge lamp is provided. Specifically, the hybrid power supply system includes a rectifier/filter, a...
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7592925 |
Lighting control having an idle state with wake-up upon actuation
A load control device comprises an actuator for controlling a connected lighting load and a plurality of status indicators for displaying the intensity of the lighting load as feedback to a user....
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7592758 |
Stabilizer with brightness control for high intensity discharge lamp
A stabilizer with brightness control for a High Intensity discharge lamp comprising a base, an positive electrode terminal configured with a power input of the base, a negative electrode terminal...
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7592757 |
System and method for dimming one or more light source
A system for dimming one or more light sources includes a first light source that emits a light of a first brightness according to an operating condition of the first light source, a second light...
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7592755 |
Light source driving circuit
A light source driving circuit for driving a light-emitting element is provided. The light source driving circuit includes a power supply circuit, a dimming circuit, and a feedback circuit/control...
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7592754 |
Method and apparatus for driving a light emitting diode
An LED drive circuit includes a current source configured to electrically drive an LED. In one configuration, the current source forms part of an integrated circuit that requires a relatively small...
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7592750 |
Fluorescent lamp with external electrodes
An external-electrode fluorescent lamp has two external electrodes disposed on its ends, wherein each external electrode has an extended portion flattened to form two substantially flat...
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7589479 |
Backlight driving apparatus of liquid crystal display and method for driving backlight driving apparatus
A backlight driving apparatus for a liquid crystal display device includes a light source, an AC driver for supplying a high voltage AC power to turn on the light source, and a protection circuit...
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7589478 |
Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system
An inverter circuit for discharge lamps for multi-lamp lighting in which the value of a negative resistance characteristic of a fluorescent lamp is controlled, and an excessively set reactance is...
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7586274 |
LED light output linearization
A system and method for producing a flattened characteristic for LED luminous output. The system may include an array containing one or more light emitted diodes, a power source connected to the...
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7586273 |
Method and apparatus for achieving perceived light mixing via alternating different colored LEDS
A method and apparatus for achieving perceived light mixing via alternating colored light emitting diodes (LEDs) is disclosed. For example, a control signal to produce a requested color output is...
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7586272 |
Cold cathode fluorescent lamp, cold cathode fluorescent lamp driving apparatus, cold cathode fluorescent lamp apparatus, liquid crystal display apparatus, control method for cold cathode fluorescent lamp, and control method for liquid crystal display apparatus
A cold cathode fluorescent lamp apparatus has a cold cathode fluorescent lamp which can be lit readily and in which leak current is minimized. A pair of internal electrodes are disposed on an inner...
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7586271 |
Efficient lighting
A light source includes a plurality of lighting elements arranged to illuminate different regions of visual perception. Circuitry coupled to the light source is configured to supply power to a...
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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...
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