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US20130043806 Driver circuit particularly suited for lighting devices  
Disclosed are various embodiments of driver circuits that operate to excite devices for light emissions therefrom regardless of the impedance ratings thereof. The driver circuits are particularly...
US20100321369 BACKLIGHT DEVICE AND DISPLAY EQUIPPED WITH THE DEVICE  
The present invention provides a backlight device that can ensure the margin for design of the placement of a circuit board by simplifying the configuration of a lighting circuit of a lamp and...
US20150206648 Transformer and Strobe Device  
To prevent a transformer such as a trigger transformer from becoming unable to perform transformation as designed due to short circuits caused by leakage of an insulating wax or the like even when...
US20110037406 HIGH PRESSURE DISCHARGE LAMP LIGHTING APPARATUS AND LIGHTING FIXTURE  
The high pressure discharge lamp lighting apparatus (10) includes a power circuit (20, 30, 40, and 50) and a starting circuit (60). The power circuit (20, 30, 40, and 50) includes a pair of output...
US20110122165 LAMP DRIVING CIRCUIT HAVING LOW VOLTAGE CONTROL, BACKLIGHT UNIT, AND LIQUID CRYSTAL DISPLAY USING THE SAME  
A lamp driving circuit is provided for controlling individual block luminances provided by corresponding locally dimmed blocks of a backlight unit of an LCD system where the backlight unit employs...
US20110115398 STARTING DEVICE WITH TWO INPUT POLES  
In order to reduce the amount of wiring complexity involved in conventional starting devices for gas discharge lamps, the invention proposes a starting circuit arrangement in which the lamp, in...
US20110254452 GAS DISCHARGE LAMPS  
An electronic ballast (10), for a gas discharge lamp (18), comprises a constant current source (14) and a switch (16). A transformer (60), for use in an igniter (90) for a gas discharge lamp (18,...
US20070210724 Power adapter and DC-DC converter having acoustic transformer  
An integrated power adapter, a portable electronic device with an integrated power adapter, and multichip modules are described.
US20110050115 METHOD AND IGNITER FOR IGNITING A GAS DISCHARGE LAMP  
A method of igniting a gas discharge lamp (2) comprises the steps of first applying a plurality of high-voltage ignition pulses with a relatively low amplitude and subsequently applying...
US20110031892 LIGHTING DEVICE AND DISPLAY DEVICE  
A lighting device (8), which is provided with a cold cathode fluorescent tube (light source) (9) and a chassis (8a) that houses the cold cathode fluorescent tube (9), includes an inverter circuit...
US20120217895 LAMP TUBE DRIVING DEVICE, LAMP TUBE MODULE, AND LAMP TUBE DRIVING SYSTEM  
Disclosed is a lamp-tube driving device including a controller, an oscillating circuit, a converter, and a protective circuit. Connection relations there-between include the oscillating circuit...
US20130049619 Device and Method for Using High Efficiency Ballasted Lamps with Electronic Transformer  
An approach is provided for devices and methods for using high efficiency ballasted lamps with an electronic transformer, especially for the replacement of traditional halogen lamps from the...
US20080054814 Ac Driven Light-Emitting Diodes  
The invention relates to a circuit (2) comprising at least two parallel-connected light-emitting diodes (4, 5) opposite poled in a first parallel branch (12) and comprising at least two...
US20120268030 LED DRIVER HAVING CONSTANT INPUT CURRENT  
Power consumed by an LED driver may be reduced by drawing, from an electronic transformer or dimmer, an input current that is constant over a plurality of input voltages. Power derived from the...
US20100282198 CORONA IGNITION WITH SELF-TUNING POWER AMPLIFIER  
A power amplifier circuit that has an inductor and capacitor connected to one end of the output winding of an RF transformer. The other end of the output winding is connected to a resistor that in...
US20110018458 LIGHTING DEVICE IMPLEMENTED THROUGH UTILIZING INSULATING TYPE PIEZOELECTRIC TRANSFORMER IN DRIVING LIGHT-EMITTING-DIODES (LEDS)  
A lighting device implemented through utilizing an insulating type piezoelectric transformer in driving light-emitting-diodes (LEDs), comprising at least said insulating type piezoelectric...
US20100045199 IGNITION TRANSFORMER FOR A DISCHARGE LAMP  
An ignition transformer for a discharge lamp is provided having a transformer core whose material and dimensions are selected in such a manner that the Curie temperature of the material after the...
US20110163669 DC/AC INVERTER SUBSTRATE HAVING VOLTAGE ABNORMALITY DETECTOR CIRCUIT  
A DC/AC inverter substrate includes a voltage abnormality detector circuit. All of a high voltage side detection sensor, a low voltage side detection sensor, and a high-voltage and low-voltage...
US20100033104 CIRCUIT CONFIGURATION FOR STARTING AND OPERATING AT LEAST ONE DISCHARGE LAMP  
A circuit arrangement for starting and operating at least one discharge lamp is provided.
US20140354172 Illumination systems  
An illumination system includes a master power supply providing power to several illumination modules. The master power supply is constructed and arranged to generate high-frequency and...
US20110062881 LIGHTING DEVICE AND PROJECTOR  
A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp includes: a pulse generating circuit which produces a high-voltage pulse and applies the...
US20100176737 DISCHARGE LAMP BALLAST HAVING AN AUTO-TRANSFORMER FOR HIGH VOLTAGE DETECTION  
A lamp ballast is provided requiring less size and cost for powering a discharge lamp. An inverter circuit converts a DC voltage from a DC power source into a voltage having a determined...
US20100213864 CHANGING POWER INPUT TO A GAS DISCHARGE LAMP  
The present disclosure thus provides a technique for providing multi-level operation of ballast circuitry for discharge lamps. In one version, an auxiliary capacitance is switched in and out of...
US20110210681 ILLUMINANT OPERATING APPLIANCE WITH POTENTIAL SEPARATION  
An operating device for operation of at least one illuminant, such as one or more LEDs, includes first and second converters and first and second logic circuits. The first converter is supplied...
US20090189535 Transformer wiring method and apparatus for fluorescent lighting  
A transformer wiring method and apparatus for fluorescent lighting are described. The fluorescent lighting apparatus includes a transformer and a ballast. An installer is easily able to balance...
US20090295304 Ballast with multilead wires  
A ballast with multilateral lead wires is provided for supplying a power for fluorescent lamps. The ballast comprises a lid and a longitudinal container for containing a ballast circuit for...
US20100001655 Inverter Circuit and Lamp Control Apparatus Having the Same  
Disclosed is an inverter circuit. The inverter circuit comprises a transformer comprising a primary coil and a secondary coil wound at a predetermined turn ratio, a first switch circuit comprising...
US20100118561 BACKLIGHT APPARATUS AND TRANSFORMER THEREOF  
A transformer is disclosed. The transformer includes a first pin, a second pin, a first side winding, a second side winding, and a jump pin. The second side winding is coupled to the first pin and...
US20080290812 Transformer Driver and Transformer Driving Method  
A transformer driver capable of making a load current constant with a simple configuration is provided. A driver 10 of the present invention applies a drive voltage Vd to the primary side of a...
US20090243505 FREQUENCY SYNCHRONIZING METHOD FOR DISCHARGE TUBE LIGHTING APPARATUS, DISCHARGE TUBE LIGHTING APPARATUS, AND SEMICONDUCTOR INTEGRATED CIRCUIT  
(1) An oscillator generates a triangular wave signal whose inclination for charging a capacitor and inclination for discharging the same are the same and which is used to turn on/off FETs Qp1 and...
US20080169768 Electronic ballast with PCB edge mounted output transformer/inductor  
An output transformer or inductor for electronic ballast which having a number of electronic components including diodes, transistors, resistors, various type of capacitors and different...
US20100141164 IGNITER CIRCUIT FOR AN HID LAMP  
An igniter circuit (10) for an HID lamp (11) has a DC input (VBUS) for coupling to a source of DC voltage, and an output (23, 24) for coupling to the HID lamp. A resonant ignition circuit (12)...
US20100045200 Lamp drive circuit  
A lamp drive circuit used for driving a number of lamps is provided. The lamps are used in the backlight module. The backlight module is used for providing a light source during a liquid crystal...
US20090026968 PLASMA SUPPLY DEVICE  
A plasma supply device generates an output power greater than 500 W at an essentially constant basic frequency greater than 3 MHz and powers a plasma process to which is supplied the generated...
US20080265794 CURRENT-DRIVEN TOROIDAL-MAGNETIC-CORE-FREE FEEDBACK TYPE BALLAST  
A current driven toroid-free feedback type ballast comprising a filter and rectifier circuit, a switch and resonant circuit and a lamp load including capacitors, wherein the filter and rectifier...
US20110007099 INVERTER CIRCUIT, BACKLIGHT DEVICE AND DISPLAY DEVICE  
Provided is an inverter circuit capable of suppressing an increase in EMI level. In at least one embodiment, the inverter circuit includes: a drive circuit for outputting a pulse signal; a...
US20120169246 ILLUMINATION DEVICE  
An illumination device (1) comprises: at least one low-power light source (50); a power input stage (20) suitable for receiving AC low voltage from an electronic transformer (ET); a power buffer...
US20120237409 OPTICAL REACTOR AND DRIVING CIRCUIT FOR OPTICAL REACTOR  
An optical reactor has a reactor enclosure defining a reaction chamber. In the reaction chamber, a light source operating at a very high frequency is arranged to radiate light to a fluid to be...
US20120001564 Illumination systems  
An illumination system includes a master power supply providing power to several illumination modules. The master power supply is constructed and arranged to generate high-frequency and...
US20090115342 Lighting System for Illumination Using Cold Cathode Fluorescent Lamps  
A lighting system for illuminating a chamber in a building includes a lighting fixture suitable for being mounted onto a surface of the chamber, so that light emitted by at least one CCFL device...
US20090195177 Self-excited inverter driving circuit  
To provide a low-cost self-excited inverter driving circuit exhibiting an excellent operational efficiency. A main inverter section is so constructed that a part of output signals is fed back by a...
US20100231136 LINE VOLTAGE DIMMABLE CONSTANT CURRENT LED DRIVER  
A programmable LED constant current driver circuit for driving LEDs at constant current and dimming the LEDs using standard, off-the-shelf dimmers is provided. The current driver circuit of the...
US20090140662 Circuit Arrangement Having a Transformation Apparatus and Operating Method for a Lamp Using a Circuit Arrangement Having a Transformation Apparatus  
The present invention relates to a circuit arrangement having a transformation apparatus, which has a primary side (P) and a secondary side (S), wherein the primary side and the secondary side (S)...
US20080238333 Inverter, Backlight Assembly Having the Same and Display Apparatus Having the Same  
A display apparatus includes a display panel and a backlight assembly including a lamp and an inverter. The inverter includes a main transformer, a main driver and a voltage controller. The main...
US20090160352 DISCHARGE TUBE LIGHTING APPARATUS  
A discharge tube lighting apparatus includes a converter that converts a voltage received from an alternating-current or direct-current power supply into a predetermined direct-current voltage and...
US20130175937 WIRELESS POWER SUPPLY SYSTEM FOR LIGHTING AND LIGHTING APPARATUS  
A wireless power supply system for lighting includes: a power transmission unit including a power transmission coil; and a power reception unit including a power reception coil. The power...
US20090315464 TRANSFORMER AND BACKLIGHT APPARATUS  
The invention discloses a transformer for a backlight apparatus including a lamp and a detecting unit. The transformer includes a bobbin, a first winding and a second winding. The bobbin has a...
US20100253238 High-Frequency Lamp and Method for the Operation Thereof  
A high-frequency lamp (10) for low-pressure and high-pressure applications, and a method for the operation thereof, that is particularly suitable for improving the characteristics with regard to...
US20100213863 Discharge Lamp Lighting Device  
To provide a discharge lamp lighting device in which the initial state of discharge in a wiring of a circuit on the secondary side of a transformer in the discharge lamp lighting device is...
US20090195172 INVERTER WITH ADJUSTABLE RESONANCE GAIN  
The present invention includes a PWM unit, a switch unit, a resonance unit, a transformer, a feedback unit and a frequency control unit, wherein the switch unit obtains a DC power from a power...

Matches 1 - 50 out of 95 1 2 >