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US20090315469 |
INVERTER FOR DRIVING LIGHT SOURCE
An inverter for driving light source is disclosed. The inverter includes a pulse control unit for producing a conduction period signal, a power switch unit driven by the conduction period signal...
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US20090278466 |
Fluorescent lamp driving circuit
A fluorescent lamp driving circuit is provided. The fluorescent lamp driving circuit collects a pulse-width-modulation and a MOS switch in a single package. The pulse-width-modulation for driving...
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US20090184651 |
Circuit system for driving high-intensity discharging lamp
The invention provides a circuit system for driving a high-intensity discharging lamp, comprising a boosting circuit, an ignition coil circuit and a clamp circuit. The boosting circuit includes a...
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US20090167199 |
FRONT-STAGE VOLTAGE-ADJUSTMENT INVERTER
The present invention discloses a front-stage voltage-adjustment inverter, which comprises: a front-stage voltage-adjustment unit, a duty cycle modulation unit, a half-bridge driving unit and a...
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US20090161362 |
SOLID STATE LIGHT ILLUMINATOR
A solid state light illuminator includes a solid state lighting element, a primary coil, and a secondary coil. The secondary coil and the solid state lighting element cooperatively form a circuit....
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US20090160347 |
ANTI-STRIATION CIRCUIT FOR CURRENT-FED BALLAST
An electronic ballast circuit having at least two distinct switching cycles also includes an anti-striation feature. More particularly the electronic ballast includes an input section configured to...
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US20090128047 |
BACKLIGHT ASSEMBLY, DISPLAY APPARATUS HAVING THE SAME AND CONTROL METHOD THEREOF
A backlight assembly with a light source unit, includes: a drive signal generator which generates a switching drive signal on the basis of a predetermined drive frequency and a feedback power fed...
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US20090039796 |
POWER SUPPLY FOR AN LCD DISPLAY
A power supply system is provided for a multiple lamp LCD panel. In one aspect, the power supply includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides...
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US20080309244 |
Primary-side driving control circuit for backlight of LCD panel
The present invention discloses a primary-side driving backlight circuit for LCD panel. The primary-side driving backlight circuit employs a single isolation device to achieve isolation request for...
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US20080303448 |
DIELECTRIC BARRIER DISCHARGE LAMP SYSTEM AND DRIVING METHOD THEREOF HAVING RELATIVELY BETTER PERFORMANCE IN STARTUP AND RE-STARTUP OF DIMMING
The configurations of a dielectric barrier discharge lamp (DBDL) system and the driving method thereof are provided in the present invention. The proposed DBDL system includes a driver circuit...
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US20080297060 |
Switched LED Nightlight for Single-Gang Junction Box
A nightlight including a light emitting diode (LED) is provided. The nightlight includes a switch that is operative to control the flow of power to the LED. The nightlight also includes a driver...
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US20080297061 |
HID lighting control with transient voltage sensing and lamp restarting, and method of making and using
A voltage control apparatus ( 10 ) for an HID lamp includes a voltage control transformer circuit ( 20 ), and is connected between supply mains ( 22 ) and a high intensity discharge (HID) lamp. The...
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US20080290809 |
CONTROL CIRCUIT OF A DRIVING CIRCUIT OF A DISCHARGE LAMP
A control circuit controls a driving circuit of a discharge lamp. The driving circuit comprises a half bridge and a clock generator that determines the switching frequency of the half bridge. The...
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US20080272706 |
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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US20080252225 |
Dielectric Barrier Discharge Lamp Lighting Device
A dielectric barrier discharge lamp lighting device includes a transformer that supplies a driving voltage to a dielectric barrier discharge lamp from a secondary coil, and a driving circuit that...
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US20080246409 |
Power Supply for Halogen Lamp
A circuit ( 10 ) for powering a halogen lamp ( 20 ) comprises an inverter ( 100 ) and an output circuit ( 300 ). During operation, the inverter ( 100 ) and output circuit ( 300 ) provide a...
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US20080231205 |
CURRENT MODE RESONANT INVERTER
The present invention provides a low-cost inverter for ballast. A current transformer is connected in series with a lamp to operate the lamp. A first transistor and a second transistor are coupled...
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US20080224626 |
OPTICAL EMISSION SPECTROMETRY DEVICE
An optical emission spectrometry device is provided. In the optical emission spectrometry device, a discharge path is formed by connecting an ignition circuit to a discharge gap, and further...
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US20080174251 |
SINGLE-ENDED DC TO AC POWER INVERTER
An inverter comprising a low-side switching element in series with a first primary winding; a high-side switching element in series with a second primary winding, where the combination of the...
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US20080157692 |
DISCHARGE LAMP LIGHTING CIRCUIT
A discharge lamp lighting circuit is provided. The discharge lamp lighting circuit includes an inverter circuit which has two output ends; a series resonant circuit which includes a capacitor, an...
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US20080151450 |
Feedback and protection circuit of liquid crystal display panel backlight apparatus
A feedback and protection circuit is provided for detecting voltage and current of a cold cathode fluorescent lamp (CCFL) of a liquid crystal display (LCD) panel backlight apparatus and integrating...
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US20080150445 |
DISCHARGE LAMP LIGHTING CIRCUIT
A discharge lamp lighting circuit is provided. The discharge lamp lighting circuit includes a power supplying portion which comprises an inverter circuit comprising a switching element; a series...
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US20080150444 |
COLD CATHODE FLUORESCENT LAMP INVERTER APPARATUS
A cold cathode fluorescent lamp inverter apparatus includes a series circuit connected to a DC power source and including first and second switching elements, a series circuit connected between a...
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US20080143270 |
DISCHARGE LAMP LIGHTING DEVICE, LIGHTING SYSTEM AND METHOD
A method and apparatus for protecting a discharge lamp lighting device from damage due to mis-wiring of a source of electrical power to the discharge lamp lighting device. The protection apparatus...
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US20080143269 |
DRIVING METHOD AND CIRCUIT FOR FLUORESCENT LAMP
A driving method for a fluorescent lamp is provided. A driving signal for driving the fluorescent lamp is generated, and an operating current of the fluorescent lamp is detected. The frequency of...
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US20080137248 |
BACKLIGHT UNIT HAVING PROTECTION CIRCUIT USING INDUCED VOLTAGE DETECTION
There is provided a backlight unit that determines whether a lamp performs an abnormal operation by detecting a voltage that is induced in a power conversion transformer without using a complicated...
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US20080136343 |
Resonant DC/AC inverter
A resonant DC/AC inverter includes a DC power source providing a DC voltage, a half-bridge power switch circuit electrically connected to the DC power source being operative to convert the DC...
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US20080129216 |
Anti-Striation Circuit For A Gas Discharge Lamp Ballast
An anti-striation circuit employs an inverter topology including a pair of electronic switches (Q, M) that are switched between a conducting state and a nonconducting state in an alternating manner...
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US20080100230 |
Inverter and driving device of backlight module
An inverter for driving at least one light-emitting unit includes a switching circuit, an electric-isolated circuit and a transforming circuit. The switching circuit generates at least one...
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US20080093996 |
Multi-Pulse Ignition Circuit For A Gas Discharge Lamp
An ignition circuit for igniting a gas discharge lamp generates a high voltage gas breakdown pulse by building up a current through a primary winding of a transformer. After a predetermined period...
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US20080061705 |
CCFL INVERTER WITH SINGLE TRANSISTOR
A power supply circuit for transforming a direct-current voltage into an alternating-current voltage for a light source is provided. The power supply circuit includes a drive circuit, a switch, a...
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