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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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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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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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7605548 |
Electricity controller, device for lighting discharge tube, display device and electric power control method
An electricity controller is provided which comprises a first power control means for controlling output power from power generator 4 to a first level during a first period of start-up time for...
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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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7595490 |
Charged particle beam emitting device and method for operating a charged particle beam emitting device
A method for operating a charged particle beam emitting device and, in particular, an electron beam emitting device including a cold field emitter is provided. The method includes the steps of...
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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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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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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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7573212 |
Automatic power control module for battery powered devices
A power control module which can be used to automatically open a power circuit for electrically operated devices, particularly battery operated devices, during predetermined periods of non-use. A...
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7560880 |
Control device for work lamp
A control device for work lamp includes a microprocessor, which is able to receive signals sent from a power supply unit and a switch. The microprocessor is able to determine the number of times...
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7560878 |
Circuit arrangement and method for operating high-pressure discharge lamps
High-pressure discharge lamps may explode at the end of their life. In order to be able to predict an explosion, the gradient of the operating voltage is evaluated. If a risk of explosion is...
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7557524 |
Lighting device
An LED lighting device is provided which is capable of being connected to a network and being controlled by a host computer also connected to the network. The lighting device has several lifespan...
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7557523 |
Discharge lamp lighting device, and lighting equipment and lighting system using the device
A level shift IC ( 3 b ) of a power supply/shutoff section ( 3 ) is operable, when a shutoff signal (Sa) is input from a timer circuit ( 8 ) for a time T during an ON state of a discharge lamp ( 7...
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7557522 |
Preheat control device for modulating voltage of gas-discharge lamp
A preheat control device for modulating the voltage of a gas-discharge lamp is disclosed, which comprises: a pulse-width modulation (PWM) circuit, for controlling the voltage of the gas-discharge...
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7548031 |
Lighting apparatus for discharge lamp
In the transient electric power control of a discharge lamp containing no mercury or a small amount of mercury, a change value relating to a lamp voltage from the initial value thereof is detected....
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7544951 |
Electron gun assembly
A device which employs an electron beam, for performing a desired function, includes an electron gun for generating the electron beam. The electron gun includes a barrel shaped rotatable structure...
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7541751 |
Soft start control circuit for lighting
A low voltage lighting system includes a transformer having at least a primary winding and a secondary winding. The low voltage lighting system also includes one or more lighting elements and a...
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7541750 |
DC to DC converter with load open detection and related method thereof
Disclosed is a DC to DC converter, which comprises: a transforming circuit, for transforming an input voltage to an output voltage; a comparator, for comparing a reference voltage and a feedback...
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7541744 |
Electronic ballast for a high-pressure discharge lamp having a current-measuring device
The invention relates to an electronic ballast and to an operating method for high-pressure discharge lamps. During a current measurement, in particular for current regulation, only switching...
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7535184 |
Photopolymerization apparatus
A light-weight, portable photocuring device possesses a single light emitting diode (LED). The single LED backed with a heat sink is driven by a driving circuit and controlled by a timing circuit....
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7528553 |
Lighting control apparatus for vehicle lighting device
A lighting control apparatus and a method of lighting control for a vehicle lighting device includes a semiconductor light source including a semiconductor light emitting element; and a current...
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7525261 |
Circuit arrangement for operating a high pressure discharge lamp
A circuit arrangement for operating a high pressure discharge lamp comprises a down converter equipped with an output capacitor and a commutator equipped with lamp connection terminals. The...
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7521877 |
Dimmer circuit for a discharge lighting apparatus
There is provided a discharge lamp lighting apparatus including a dimmer circuit which is provided with a control means to dynamically adjust screen brightness according to an input signal, and a...
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7518321 |
Luminance adjusting device
The invention is directed to a light module, which allows the individual lamp unit to be replaced with a new one and the luminance of the newly-replaced lamp unit can be automatically or manually...
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7474063 |
Anti-cycling control system for luminaires
An anti-cycling luminaire control system may detect repeated lamp-off conditions and interrupt power to the lamp and provide an indication of lamp cycling after a predetermined number of lamp-off...
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7471287 |
Light source driving circuit for driving light emitting diode components and driving method thereof
A light source driving circuit is adapted for driving a light-emitted component. The light source driving circuit includes a power supply, a dimming circuit, and a feedback circuit. An output...
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7471050 |
Organic EL drive circuit and organic EL display device
To provide an organic EL drive circuit and an organic EL display device using the organic EL drive circuit, which, when grey levels of passive matrix type organic EL elements are controlled...
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7462992 |
Starter circuit having regulated starter voltage
A circuit for the generation of ignition pulses for a lamp has: an ignition pulse transformer, a device for the generation of ignition pulses (ignition pulse generator) at a primary winding of the...
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7459867 |
Program start ballast
A ballast ( 10 ) for powering at least one gas discharge lamp ( 70 ) in a program start mode comprises an inverter ( 200 ), a resonant output circuit ( 400 ), and a control circuit ( 600 ). During...
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7456590 |
Vehicular lamp
A vehicular lamp used in an automobile includes: semiconductor light emitting elements for emitting light; a time measurement unit for measuring time in which the semiconductor light emitting...
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7453219 |
Method and apparatus for controlling illumination of a display in a portable wireless communication device
A portable wireless communication device having a display screen, a light source that is capable of illuminating the display screen, and a processor coupled to the light source, dynamically adjusts...
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7449847 |
Systems and methods for synchronizing lighting effects
In one example, a lighting apparatus comprises a processor wherein the processor is configured to control a color-changing lighting effect generated by the lighting apparatus; wherein the processor...
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7449840 |
Ignitor turn-off switch for HID ballasts
The instant invention relates to an ignitor turn-off switch for ballasts for high intensity discharge (HID) lamps to prevent damage to ballasts by disconnecting the ignitor if a lamp has failed or...
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7439690 |
Discharge lamp lighting apparatus and discharge lamp lighting method
A lighting control technology for a discharge lamp can be capable of suppressing start-up variations of luminous flux in consideration of variations in lamp voltage. A discharge lamp lighting...
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7436134 |
Cyclical, aquarium and terrarium light
The aquarium or terrarium light systems simulates rising and setting of the sun. A housing contains two lamps, one variable lumen output for graduated light output and the other for full ON or OFF...
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7436123 |
Discharge lamp ballast device and lighting appliance
An inverter controller dives an inverter to operate at a switching frequency selectively from one of a preheating frequency (f 1 ), a starting frequency (f 2 ), and a lighting frequency (f 3 )...
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7432662 |
Circuit arrangement and method for operating at least one lamp
The present invention relates to a circuit arrangement for operating at least one lamp (LA), which has a first filament (W 1 ) and a second filament (W 2 ), it comprising an apparatus ( 10 ) for...
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7432660 |
IC-based low cost reliable electronic ballast with multiple striking attempts and end of lamp life protection
The present invention relates generally to a simple, low cost ballast for fluorescent lamps that incorporates an integrated circuit and a number of ballast protection functions to cost effectively...
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7429829 |
Discharge lamp lighting circuit with an open protection circuit
A discharge lamp lighting circuit includes a plurality of discharge lamps, a driving circuit, a control circuit, an open protection circuit, which are connected in series. The open protection...
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7425804 |
Lamp drive device of projector
A projector includes a lamp drive circuit which drives a lamp, and a lamp drive current detection unit which detects the lamp drive current. Based upon the lamp drive current which is detected, the...
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7425802 |
Discharge lamp lighting apparatus, luminaire and illumination system
There is provided a high-intensity discharge lamp lighting apparatus to be loaded with a plurality of types of high-intensity discharge lamps and connected with any one of the lamps to be lighted,...
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7414372 |
Dimming ballast control circuit
A dimming ballast control circuit for driving a ballast power switching circuit powering a gas discharge lamp. The circuit includes a driver circuit for driving high and low side switches of the...
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7405524 |
Light management system device and method
A lighting control system is disclosed. The lighting control system is electrically coupled to a load circuit for controlling indoor and/or outdoor lighting. The lighting control system includes a...
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7405522 |
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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7402962 |
System and methods of driving an electroluminescent lamp
Embodiments of the present invention include systems and methods of driving an electroluminescent lamp. In one embodiment, the electroluminescent lamp is driven to a first threshold during a first...
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7400100 |
Discharge-lamp lighting apparatus and projector
A discharge-lamp lighting apparatus includes a control circuit that determines electric power supplied to a high-pressure discharge lamp after the high-pressure discharge lamp is started by an...
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7397205 |
Illumination brightness and color control system and method therefor
An illumination brightness and color control system for adjusting the illumination of a plurality of point light sources and method therefor are provided, implemented in a time division manner. A...
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7385361 |
Ballast for high-pressure discharge lamp and method of operating the same
An operating device control section ( 4 ) controls an output current of a DC-DC converter ( 1 ), and also controls a commutation frequency of a commutator ( 2 ) that converts a direct current...
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