| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 09/08/1999 | EP0765593B1 Fluorescent tube control |
| 09/08/1999 | CN2337741Y Electronic ballast with high performance |
| 09/08/1999 | CN2337740Y Starting luminous lamp switch |
| 09/08/1999 | CN1228244A 镇流器 Ballast |
| 09/08/1999 | CN1228243A Anti-flicker circuit for fluorescent lamp ballast driver |
| 09/08/1999 | CN1228242A Ballast for compact fluorescent lamp with current protection |
| 09/08/1999 | CN1228241A Bidirectional silicon controlled compact fluorescent lamp with low power factor |
| 09/08/1999 | CN1228240A Circuit arrangement for operating discharge lamp |
| 09/07/1999 | US5949633 Fluorescent lamp drive system with transformer over-voltage protection circuit |
| 09/07/1999 | US5949199 Gas discharge lamp inverter with a wide input voltage range |
| 09/07/1999 | US5949198 Light-emission controlling apparatus |
| 09/07/1999 | US5949197 Apparatus and method for dimming a gas discharge lamp |
| 09/07/1999 | US5949196 Method and system for switchable light levels in operating gas discharge lamps with an inexpensive single ballast |
| 09/07/1999 | US5949192 Operating apparatus for discharge lamp |
| 09/07/1999 | US5949191 Heat dissipating transformer in a power supply circuit for a motor vehicle headlight |
| 09/07/1999 | US5949190 Internal combustion engine-driven discharge lamp lighting apparatus |
| 09/07/1999 | CA2126768C Magnetic-field discharge lamp and lighting device using the same |
| 09/06/1999 | CA2254580A1 Alternating current hid lamp with magnetic deflection |
| 09/03/1999 | CA2260466A1 Coaxial applicators for electrodeless high intensity discharge lamps |
| 09/02/1999 | WO1999044398A1 Ballast for electric lamps |
| 09/02/1999 | WO1999044396A1 Lamp driven voltage transformation and ballasting system |
| 09/02/1999 | WO1999044278A1 D.c.-d.c. converter with a transformer and a reactance coil |
| 09/02/1999 | WO1999044097A1 Projection display apparatus |
| 09/02/1999 | DE19907942A1 Flash apparatus used for photography |
| 09/02/1999 | DE19807449A1 Vorschaltgerät für elektrische Lampen Ballast for electric lamps |
| 09/01/1999 | EP0939476A2 Device for central emergency lighting supply |
| 09/01/1999 | EP0938835A2 A ballast for a high intensity discharge lamp |
| 09/01/1999 | CN2336540Y Fluorescent lamp circuit arrangement having starting switch |
| 09/01/1999 | CN2336539Y Cerium iron fire-stone starting switch bulb |
| 09/01/1999 | CN1227667A Method and apparatus for starting difficult to start electrodeless lamp |
| 08/31/1999 | US5946209 Motion sensing system with adaptive timing for controlling lighting fixtures |
| 08/31/1999 | US5945788 Electronic ballast with inverter control circuit |
| 08/31/1999 | US5945787 Power control of an AC-operated high-pressure gas discharge lamp, particularly for motor vehicles |
| 08/31/1999 | US5945786 Igniter circuit |
| 08/31/1999 | US5945785 Power source device with minimized variation in circuit efficiency due to variation in applied voltage to driving transformer |
| 08/31/1999 | US5945784 High intensity discharge ballast |
| 08/31/1999 | US5945783 Zero energy-storage ballast for compact fluorescent lamps |
| 08/26/1999 | WO1999043188A1 Drive scheme for low pressure gas discharge lamps |
| 08/25/1999 | EP0938128A1 Planar gas discharge lamp dimmable over a wide range and system including such a lamp with a control circuit |
| 08/25/1999 | CN2335339Y High-pressure sodium lamp electronic ballast |
| 08/25/1999 | CN2335338Y High-frequency pump type electronic energy-saving lamp |
| 08/25/1999 | CN1227042A 镇流器 Ballast |
| 08/25/1999 | CN1227041A Ignition device for discharge lamp and method for igniting discharge lamp |
| 08/24/1999 | US5942953 Oscillation circuit driven alternately by two different square wave periodic signals having different half cycle durations |
| 08/24/1999 | US5942883 Circuit for supplying current |
| 08/24/1999 | US5942860 Electronic ballast for a high intensity discharge lamp with automatic acoustic resonance avoidance |
| 08/24/1999 | US5942859 Discharge lamp lighting device |
| 08/24/1999 | US5942835 Piezoelectric transformer drive circuit |
| 08/23/1999 | CA2261248A1 Gas discharge lamps and systems |
| 08/19/1999 | WO1999041956A1 Improvements to devices for powering a motor vehicle headlight discharge lamp |
| 08/19/1999 | WO1999041955A1 Method and arrangement for controlling the ignition and status of a lamp |
| 08/19/1999 | WO1999041954A1 Circuit for actuating at least one electrode-less discharge lamp |
| 08/19/1999 | WO1999041953A1 Electronic dimming ballast |
| 08/19/1999 | DE19858359A1 Structure for attaching ballast apparatus for electrical discharge lamp of motorbike |
| 08/19/1999 | DE19805801A1 Lamp control circuit for all high pressure gas discharge lamps for example sodium, mercury, halogen and metal vapor lamps |
| 08/19/1999 | DE19805314A1 Schaltungsanordnung zum Betrieb mindestens einer elektrodenlosen Entladungslampe Circuit arrangement for operating at least one electrodeless discharge lamp |
| 08/19/1999 | CA2286139A1 Circuit for actuating at least one electrode-less discharge lamp |
| 08/18/1999 | EP0936846A1 Method and arrangement for determining remaining operating life of fluorescent lamp |
| 08/18/1999 | EP0936845A1 Device for lighting and operating a fluorescent lamp |
| 08/18/1999 | EP0935911A1 Anti-flicker scheme for a fluorescent lamp ballast driver |
| 08/18/1999 | EP0935909A2 Circuit arrangement |
| 08/18/1999 | EP0935844A1 Voltage regulation scheme for power supply having a voltage-fed inverter |
| 08/18/1999 | CN2334139Y 模块化彩灯控制器 Modular lantern controller |
| 08/18/1999 | CN2334137Y Electronic transformer for E-shape core self-excited semi-bridge neon lamp |
| 08/18/1999 | CN2334136Y Protective circuit for electronic ballast |
| 08/18/1999 | CN2334135Y High-voltage package for neon lamp |
| 08/18/1999 | CN2334134Y Energy-saving lamp ballast device for R7s holder |
| 08/17/1999 | US5939840 Liquid crystal back light illuminating device and liquid crystal display device |
| 08/17/1999 | US5939838 Ferroresonant transformer ballast for maintaining the current of gas discharge lamps at a predetermined value |
| 08/17/1999 | US5939837 Electronic ballast circuit for independently increasing the power factor and decreasing the crest factor |
| 08/17/1999 | US5939836 Discharge lamp lighting apparatus and lighting apparatus |
| 08/17/1999 | US5939835 Discharge lamp lighting device with power system, control system and power source system |
| 08/17/1999 | US5939834 Power supply circuit with complementary converter switches |
| 08/17/1999 | US5939832 Safety disconnection with asymmetric lamp power |
| 08/17/1999 | US5939830 Method and apparatus for dimming a lamp in a backlight of a liquid crystal display |
| 08/12/1999 | WO1999040757A1 A method and device for operating electronic ballasts for high intensity discharge (hid) lamps |
| 08/12/1999 | WO1999040602A1 Microwave assisted flashlamps |
| 08/12/1999 | WO1999030539A3 Method and apparatus for power factor correction |
| 08/12/1999 | CA2319738A1 Microwave assisted flashlamps |
| 08/12/1999 | CA2318144A1 A method and device for operating electronic ballasts for high intensity discharge (hid) lamps |
| 08/11/1999 | EP0935278A1 High-voltage discharge lamp, high-voltage discharge lamp device, and lighting device |
| 08/11/1999 | EP0934683A1 Inductive-resistive fluorescent apparatus and method |
| 08/11/1999 | EP0934682A1 A power control apparatus for lighting systems |
| 08/11/1999 | EP0809923B1 Circuit for operating a discharge lamp |
| 08/11/1999 | CN2333139Y Electronic ballast of fluorescent lamp |
| 08/11/1999 | CN2333138Y High strength gas discharge lamp electronic ballast |
| 08/10/1999 | US5936361 Discharge lamp lighting circuit with lighting condition detector |
| 08/10/1999 | US5936360 Brightness controller for and method for controlling brightness of a discharge tube with optimum on/off times determined by pulse waveform |
| 08/10/1999 | US5936359 Apparatus for efficient remote ballasting of gaseous discharge lamps |
| 08/10/1999 | US5936358 Dielectric barrier discharge device |
| 08/10/1999 | US5936357 Electronic ballast that manages switching frequencies for extrinsic purposes |
| 08/10/1999 | US5936356 Fluorescent lamp flashing circuit and control |
| 08/05/1999 | DE19850619A1 Illumination device for aquarium or terrarium |
| 08/04/1999 | EP0933979A1 High frequency power supply for lamps |
| 08/04/1999 | EP0933978A1 Starter for discharge lamps |
| 08/04/1999 | EP0933977A2 Device for igniting and operating a high pressure discharge lamp in a vehicle |
| 08/04/1999 | EP0933976A2 Device for igniting a high pressure discharge lamp in a vehicle |
| 08/04/1999 | EP0933975A2 Ignition transformer |
| 08/04/1999 | EP0933974A1 Ignition device for a discharge lamp |
| 08/04/1999 | EP0933008A1 Circuit arrangement |