| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 08/04/1999 | CN2332142Y Electronic ballast with filament preheating device |
| 08/04/1999 | CN2332141Y Electronic starter for fluorescent lamp |
| 08/04/1999 | CN1224920A Pulsed gas-filled lamp |
| 08/03/1999 | US5933340 Frequency controller with loosely coupled transformer having a shunt with a gap and method therefor |
| 08/03/1999 | US5932997 Bit-weighted regulator |
| 08/03/1999 | US5932976 Discharge lamp driving |
| 08/03/1999 | US5932974 Ballast circuit with lamp removal protection and soft starting |
| 07/29/1999 | WO1999038248A1 Ac power converter |
| 07/28/1999 | EP0931437A1 Method and device for producing series of impulse voltages to operate discharge lamps and circuit pertaining thereto |
| 07/28/1999 | EP0931436A1 A power distribution system |
| 07/28/1999 | CN1224325A Electronic ballast circuit for fluorescent lamp |
| 07/28/1999 | CA2255098A1 Ignition apparatus for a discharge lamp |
| 07/27/1999 | US5930130 Electronic power supply system |
| 07/27/1999 | US5930127 To provide an ac voltage to a load circuit |
| 07/27/1999 | US5930126 Ballast shut-down circuit responsive to an unbalanced load condition in a single lamp ballast or in either lamp of a two-lamp ballast |
| 07/27/1999 | US5930121 Power conversion circuit for driving a fluorescent lamp |
| 07/27/1999 | US5929573 Switching device having varying RC time period for ignition of a lamp |
| 07/22/1999 | WO1999037125A1 A power factor correction circuit |
| 07/22/1999 | WO1999037124A1 A multiple flash/single lamp circuit for fast sequential strobing |
| 07/22/1999 | WO1999036940A2 High frequency inductive lamp and power oscillator |
| 07/22/1999 | CA2317730A1 High frequency inductive lamp and power oscillator |
| 07/21/1999 | EP0930809A2 Procedure and device for the power supply of fluorescent discharge lamps |
| 07/21/1999 | EP0930808A2 Incrementally preheating and lighting system for a discharge lamp |
| 07/21/1999 | EP0929997A1 Circuit arrangement |
| 07/21/1999 | EP0929996A1 Circuit arrangement |
| 07/21/1999 | EP0929995A1 Ballast |
| 07/21/1999 | CN2330141Y Electronic ballast for fluorescent lamp |
| 07/21/1999 | CN2330140Y Low-loss energy-saving self-glow starting fluorescent lamp ballast |
| 07/21/1999 | CN2330139Y Electronic glow starter of fast low-voltage glow starting |
| 07/20/1999 | US5925990 Microprocessor controlled electronic ballast |
| 07/20/1999 | US5925989 For igniting and operating a high-pressure discharge lamp |
| 07/20/1999 | US5925988 Backlight using transverse dynamic RF electric field and transparent conductors to provide an extended luminance range |
| 07/20/1999 | US5925987 Printed circuit board mounted electrodeless gas discharge lamp |
| 07/20/1999 | US5925986 Method and apparatus for controlling power delivered to a fluorescent lamp |
| 07/20/1999 | US5925985 Electronic ballast circuit for igniting, supplying and dimming a gas discharge lamp |
| 07/20/1999 | US5925984 Circuit arrangement having LC parallel tuned drive circuitry |
| 07/20/1999 | US5925983 Circuit for inhibiting the supply of power to a discharge lamp |
| 07/20/1999 | US5925982 Power supply circuit for intermittently actuating a filament of a vacuum fluorescent display |
| 07/20/1999 | CA2153159C Backlighting for liquid crystal display |
| 07/15/1999 | WO1999035892A1 Electronic ballast having an oscillator shutdown circuit for fluorescent tubes or lamps |
| 07/15/1999 | WO1999035891A1 Light source using dielectric barrier discharge lamp |
| 07/15/1999 | WO1999035890A1 Electronic ballast |
| 07/14/1999 | EP0928552A1 Arrangement for determining the state of a high-pressure gas discharge lamp on switching-on |
| 07/14/1999 | CN2329137Y High power factor electron ballast |
| 07/14/1999 | CN2329136Y Electron integrated startor for day-light lamp |
| 07/14/1999 | CN2328872Y 应急灯 Emergency lights |
| 07/14/1999 | CN1223066A 镇流器 Ballast |
| 07/14/1999 | CN1222823A Soft started current limiter for lamp tube |
| 07/14/1999 | CN1222822A Soft started current limiter for serially connected lamp tubes |
| 07/13/1999 | US5923546 Control circuit and method for driving and controlling parasitic vibration of a piezoelectric transformer-inverter |
| 07/13/1999 | US5923542 Method and apparatus for driving piezoelectric transformer |
| 07/13/1999 | US5923129 Apparatus and method for starting a fluorescent lamp |
| 07/13/1999 | US5923128 Electronic ballast for high-intensity discharge lamps |
| 07/13/1999 | US5923127 High-pressure discharge lamp with miniature discharge vessel and integrated circuitry |
| 07/13/1999 | US5923126 Fluorescent lamp electronic ballast with rapid voltage turn-on after preheating |
| 07/13/1999 | US5923125 Vehicular discharge lamp lighting circuit device for controlling a plurality of head lamp functions |
| 07/13/1999 | US5923118 Small, efficient, mercury free, cold weatherproofing |
| 07/13/1999 | CA2093921C High power lamp |
| 07/08/1999 | WO1999034651A1 Method and apparatus for dimming a lamp in a backlight of a liquid crystal display |
| 07/08/1999 | WO1999034650A1 Electronic lamp ballast |
| 07/08/1999 | WO1999034649A1 Method for detecting a lamp change and electronic lamp ballast for operating gas-discharge lamps using such a method for detecting a lamp change |
| 07/08/1999 | WO1999034648A1 Electronic lamp ballast |
| 07/08/1999 | WO1999034647A1 Method and device for detecting the rectification effect occurring in a gas-discharge lamp |
| 07/08/1999 | WO1999034502A1 Pulse power source apparatus |
| 07/07/1999 | EP0928061A1 Neutral-point inverter |
| 07/07/1999 | EP0927506A1 Process for generating voltage pulse sequences and circuit assembly therefor |
| 07/07/1999 | EP0856241B1 Methods of controlling the brightness of a glow discharge |
| 07/07/1999 | CN2328146Y Fully sealed electronic ballast for sodium lamp |
| 07/07/1999 | CN1222248A Multiple reflection electrodeless lamp with sulfur or sellenium filland method for providing radiation using such a lamp |
| 07/06/1999 | US5920408 Color image reader |
| 07/06/1999 | US5920155 Electronic ballast for discharge lamps |
| 07/06/1999 | US5920153 Power supply for light sources, particularly for the quick ignition of fluorescent lamps and the like |
| 07/01/1999 | WO1999032953A1 Microprocessor controlled electronic ballast |
| 06/30/1999 | EP0926928A1 Discharge lamp lighting device and illumination device |
| 06/30/1999 | EP0925712A2 Circuit arrangement |
| 06/30/1999 | EP0925711A2 Circuit arrangement for operating a discharge lamp |
| 06/30/1999 | EP0925710A2 Electronic ballast |
| 06/30/1999 | EP0777929A4 Fail-safe lighting system with load shedding and dimming |
| 06/30/1999 | CN1221308A Fluorescent tube current-limiting device with abnormal load protector |
| 06/29/1999 | USRE36239 Strobe control apparatus |
| 06/29/1999 | US5917717 For high-frequency operation of a discharge lamp |
| 06/29/1999 | US5917290 Parallel-storage series-drive electronic ballast |
| 06/29/1999 | US5917289 Lamp ballast with triggerless starting circuit |
| 06/29/1999 | US5917287 Operating circuit for high-pressure discharge lamps with an ignition-time bridging function |
| 06/24/1999 | WO1999031941A1 An electronic ballast |
| 06/24/1999 | WO1999031940A1 Power device for illuminated light box |
| 06/24/1999 | WO1999031710A1 High-pressure discharge lamp |
| 06/24/1999 | DE19756437A1 Vehicle headlamp with high and dipped beam settings |
| 06/24/1999 | DE19755538A1 Fluorescent light with over-current protection |
| 06/23/1999 | EP0923850A1 Circuit arrangement |
| 06/23/1999 | CN1220572A Free oscillator circuit with simple starting circuit |
| 06/23/1999 | CN1220477A Luminescent material discharge lamp with overcurrent safety device |
| 06/22/1999 | US5914871 Device for multi-stage illuminance control for light source of scanner |
| 06/22/1999 | US5914843 Neon power supply with improved ground fault protection circuit |
| 06/22/1999 | US5914572 Discharge lamp driving circuit having resonant circuit defining two resonance modes |
| 06/22/1999 | US5914571 Method for igniting high frequency operated, high intensity discharge lamps |
| 06/22/1999 | US5914570 Compact lamp circuit structure having an inverter/boaster combination that shares the use of a first n-channel MOSFET of substantially lower on resistance than its p-channel counterpart |
| 06/22/1999 | US5914569 Switching controller and control device for a low pressure fluorescent lamp |
| 06/22/1999 | US5914566 Lighting circuit for applying a negative AC voltage to a discharge lamp |
| 06/22/1999 | US5914564 RF driven sulfur lamp having driving electrodes which face each other |