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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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7586269 |
Device for driving light source module
A driving device for driving a lamp (L 2 ) includes a power stage circuit ( 21 ), a transformer circuit ( 22 ), a resonance circuit ( 23 ) and a PWM controller ( 25 ). The power stage circuit...
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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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7586261 |
Rare gas fluorescent lamp
The present rare gas fluorescent lamp can prevent reduction of an effective light-emitting region by securely suppressing creeping discharge even when a conductive material is provided to improve...
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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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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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7586265 |
Illumination device
An illumination device is described that includes a light source that is an organic light-emitting diode and a control device capable of adjusting the current through the organic light-emitting...
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7586266 |
Driver circuit for an HID lamp and method for operating an HID lamp
The present invention relates to a driver circuit for an HID lamp having a circuit arrangement for applying a radiofrequency signal for the purpose of starting the lamp and for applying a...
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7583034 |
LED controller and method therefor
In one embodiment, a vertical N-channel transistor is coupled in a high side configuration to control a current through an LED. A control circuit operates the vertical N-channel transistor to...
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7583035 |
System and method for driving LED
A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital...
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7579781 |
Organic electro-luminescent display device and method for driving the same
An organic electro-luminescent display device according to an embodiment includes a light emitting device in a pixel to emit light in response to a current applied thereto; a data line for...
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7579788 |
Power supply system of a light source and a light source actuating method
A power supply system of a light source includes a luminance control unit, luminance adjusting unit, control circuit and voltage transformer. The luminance control unit is for receiving a turn-on...
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7579782 |
Circuitry for portable lighting devices and portable rechargeable electronic devices
A portable rechargeable electronic device, such as a flashlight, with external charging contacts and a short protection circuit is disclosed. The short protection circuit electrically uncouples one...
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7579787 |
Methods and protection schemes for driving discharge lamps in large panel applications
The present disclosure introduces a simple method and apparatus for converting DC power to AC power for driving discharge lamps such as a cold cathode fluorescent lamp (CCFL), an external electrode...
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7579786 |
Method, apparatus, and system for driving LED's
A method and apparatus for driving LED's is disclosed, comprising the steps of receiving a desired intensity value, wherein the desired intensity value represents the desired intensity for the...
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7576498 |
Organic EL drive circuit and organic EL display device using the same
A voltage corresponding to the maximum voltage value among respective terminal voltages at least at the time of light emission of organic EL elements is held in a hold circuit, and a power source...
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7576497 |
Synchronous light emitting diode lamp string
The present invention provides a light emitting diode lamp, which includes at least a light emitting diode and a control circuit. The light emitting diode lamp has an anode pin, a cathode pin, and...
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7573210 |
Method and system for feedback and control of a luminaire
A method and system for controlling the chromaticity and luminous flux output of a digitally controlled luminaire. The luminaire includes one or more light-emitting elements and one or more light...
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7573729 |
Resonant power LED control circuit with brightness and color control
The invention relates to a resonant power LED control circuit for the independent, simultaneous brightness and color or color temperature control of two LEDs ( 41, 42 ) or two groups of LEDs,...
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