| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 02/23/1994 | EP0583841A2 Switch mode power supply |
| 02/23/1994 | EP0583838A2 Lamp ballast circuit |
| 02/23/1994 | CN2157651Y 电子镇流器 Electronic Ballast |
| 02/23/1994 | CN2157584Y Clip induction ballast core |
| 02/23/1994 | CN1082768A Electroless low-pressure discharge lamp |
| 02/22/1994 | US5289219 Camera provided with red-eye phenomenon preventing feature |
| 02/22/1994 | US5289085 Capacitively driven RF light source having notched electrode for improved starting |
| 02/22/1994 | US5289084 Lamp arrangement employing a resonant circuit formed from an autotransformer and a capacitor where the capacitor is switched out of the resonant circuit and into a power factor correcting circuit when the ignition of the lamp is sensed |
| 02/22/1994 | US5289083 Resonant inverter circuitry for effecting fundamental or harmonic resonance mode starting of a gas discharge lamp |
| 02/22/1994 | CA2104619A1 Electronic lamp ballast |
| 02/21/1994 | CA2104252A1 Lamp ballast circuit |
| 02/21/1994 | CA2104251A1 Switch mode power supply |
| 02/17/1994 | WO1994004011A1 Fluorescent tube driver and lighting system |
| 02/17/1994 | CA2141617A1 Florescent tube driver and lighting system |
| 02/16/1994 | CN2156651Y Energy-saving electronic ballast for fluorescent lamp |
| 02/16/1994 | CN2156650Y 补偿式镇流器 Compensation ballast |
| 02/16/1994 | CN2156649Y High-effect energy-saving device combined with inductance ballast fluorescent lamp |
| 02/16/1994 | CN2156648Y Voltage-doubler ballast for fluorescent lamp |
| 02/16/1994 | CN2156647Y Starter for fluorescent lamp |
| 02/16/1994 | CN2156646Y Neon lamp transformer |
| 02/16/1994 | CN1082305A Frequency modulator for improved lighting |
| 02/16/1994 | CN1082304A Control apparatus of fluorescent lamp |
| 02/16/1994 | CN1082244A Adjustable ballast for more lamps with safe isolation between them |
| 02/15/1994 | US5287134 Photographic flash apparatus |
| 02/15/1994 | US5287040 Variable control, current sensing ballast |
| 02/15/1994 | US5287039 Method of hot restarting electrodeless HID lamps |
| 02/15/1994 | CA2076175A1 Ballast connector |
| 02/12/1994 | CA2103636A1 Starting and operating circuit for arc discharge lamp |
| 02/10/1994 | DE4226126A1 Photo-flash generator for studio use - has thyristors to allow capacitor charging through inductor during positive cycle and inductive charging when thyristors switch off |
| 02/09/1994 | EP0581912A1 Improved low loss ballast system |
| 02/09/1994 | CN2155653Y Electronic trigger for high-pressure sodium bulb |
| 02/09/1994 | CN2155626Y High power-factor electronic lamp with abnormal state protector |
| 02/08/1994 | CA1326881C Ignitor disabler |
| 02/03/1994 | WO1994003034A1 High frequency electronic circuit for load ballasting |
| 02/03/1994 | WO1994003033A1 Power supply circuit |
| 02/03/1994 | CA2140290A1 High frequency electronic circuit for load ballasting |
| 02/02/1994 | EP0581091A1 Ballast for supplying high pressure discharge lamps in vehicles with a low-frequency square-wave voltage |
| 02/02/1994 | CN2155124Y Multifunction fluorescent lamp ballast |
| 02/02/1994 | CN2155123Y Compensation fluorescent lamp ballast |
| 02/02/1994 | CN2155122Y Cylinder-shape ballast of straight tube type fluorescent lamp |
| 02/02/1994 | CN2155072Y 照明装置 Lighting device |
| 02/02/1994 | CN1081555A Improvement for gaseous conductance lamp |
| 02/01/1994 | US5283502 Method and circuit for square wave current generation by harmonic injection |
| 02/01/1994 | CA2006282C Glow discharge lamp having dual anodes and circuit for operating same |
| 02/01/1994 | CA2006280C Electronic ballast circuit for discharge lamp |
| 01/27/1994 | DE4223934A1 HF full bridge generator for fluorescent lamp - has two ring core transmitters with windings where drive of each transistor base is associated with ring core |
| 01/26/1994 | EP0580257A1 Circuit arrangement for square-wave modulation of a high-frequency current in a ballast for a discharge lamp |
| 01/26/1994 | EP0580255A1 DC-AC converter with protection means, for supplying a discharge lamp |
| 01/26/1994 | EP0383831B1 Circuit arrangement for igniting and operating gas discharge lamps |
| 01/26/1994 | CN2154582Y Energy-saving ballast |
| 01/26/1994 | CN2154581Y Fluorescent lamp with resonance energy-saving and cabable for chang brightress |
| 01/26/1994 | CN2154580Y Energy-saving compensater for fluorescent lamp |
| 01/26/1994 | CN2154529Y Double-function pullswitch with start function special for fluorescent lamp |
| 01/25/1994 | US5282120 Converter for providing boost voltage for a flash discharge lamp serving as a photographic light |
| 01/24/1994 | CA2100630A1 Starting circuit for a high intensity discharge lamp |
| 01/19/1994 | EP0579572A1 Lamp brightness control circuit with ambient light compensation |
| 01/19/1994 | CN2153923Y Special-purpose electronic booster device for fluorescent lamp |
| 01/19/1994 | CN2153922Y Starter holder for fluorescent lamp |
| 01/18/1994 | US5280217 Apparatus for coupling energy to electrodeless lamp applicators |
| 01/13/1994 | DE4317904A1 Electronic ballast circuit for discharge lamps - has voltage increasing transformer with primary and main secondary coils, providing discharge voltage |
| 01/13/1994 | DE4222865A1 Ballast circuit for fluorescent discharge lamp - uses frequency unit to generate HF for ignition and lower frequency for running of lamp |
| 01/13/1994 | DE4222634A1 Fluorescent tube operating circuit using AC and rectangular voltages - has AC voltage applied to transformer primary, whose secondary is coupled to fluorescent tube and parallel switch |
| 01/13/1994 | DE4222633A1 AC voltage generating circuit for fluorescent tubes - has capacitor and inductivity as resonance circuit tuned to AC voltage frequency |
| 01/12/1994 | EP0578575A1 Device for operating a discharge tube with a high frequency high voltage signal |
| 01/12/1994 | EP0577975A1 Variable control, current sensing ballast |
| 01/12/1994 | EP0577704A1 Power supply having high power factor with control that tracks the input alternating supply |
| 01/12/1994 | CN2153202Y Energy-saving starting switch for fluorescent lamp |
| 01/12/1994 | CN2153201Y Low-temp low-voltage glow starter for fluorescent lamp |
| 01/12/1994 | CN1080805A Colour-changeable neon lamp and fluorescent lamp |
| 01/12/1994 | CN1080781A Electrodeless discharge lamp containing push-pull class e amplifier and bifilar coil |
| 01/05/1994 | EP0577105A1 Inverter circuit and electrodeless discharge lamp lighting apparatus using the same |
| 01/05/1994 | EP0576991A2 Control apparatus of fluorescent lamp |
| 01/05/1994 | DE4322384A1 Ignition device for discharge lamp - has feedback control through monitors on lamp to vary pulse-width modulator on drive circuit |
| 01/05/1994 | DE4322139A1 Halogen discharge lamp for vehicle - has protection circuit to isolate lamp if abnormal conditions are detected at lamp terminals |
| 01/05/1994 | DE4320857A1 Halogen discharge lamp for vehicle - has protection circuit for start-up current and for failing battery supply |
| 01/05/1994 | DE4220690A1 Electronic ballast circuit for compact fluorescent lamp - has SMD devices mounted on circuit board with height profile matching shape of socket |
| 01/05/1994 | CN2152369Y Voltage step-up ballast |
| 01/05/1994 | CN2152368Y Daylight lamp ballast |
| 01/05/1994 | CN1080455A Filamentless gas-conducted lamp |
| 01/05/1994 | CN1080201A Artificial electronic firecracker |
| 01/04/1994 | US5276385 High-pressure discharge lamp and lighting method |
| 12/29/1993 | CN2151605Y Electronic urgent lamp |
| 12/29/1993 | CN1080098A Zero-voltage complementary switching hige efficiency class D amplifier |
| 12/28/1993 | US5274540 Inverter device for stable, high power-factor input current supply |
| 12/28/1993 | US5274299 Grid controlled gas discharge lamp |
| 12/28/1993 | US5274274 Power controller |
| 12/23/1993 | WO1993026140A1 Electrodeless discharge lamp containing push-pull class e amplifier and bifilar coil |
| 12/23/1993 | CA2137289A1 Electrodeless discharge lamp containing push-pull class e amplifier and bifilar coil |
| 12/22/1993 | EP0574993A1 Luminaire of variable color temperature |
| 12/22/1993 | EP0574554A1 Driver circuit for a plurality of gas discharge lamps. |
| 12/22/1993 | EP0574540A1 Solar powered lamp utilizing cold cathode fluorescent illumination and method of facilitating same. |
| 12/22/1993 | CN2150700Y Electronic inductive type fluorescence ballast |
| 12/22/1993 | CN2150699Y Fluorescence lamp ballast |
| 12/21/1993 | US5272420 Biasing system for reducing ion loss in lamps |
| 12/21/1993 | US5272327 Constant brightness liquid crystal display backlight control system |
| 12/16/1993 | DE4218968A1 Electrical current supply circuit for LV fluorescent lamp - uses flat capacitor allowing compact incorporation in housing for choke coil or transformer |
| 12/15/1993 | CN2149742Y Non-consumption type electric resistance arrangement with ballast function |
| 12/15/1993 | CN2149741Y Voltage-increasing type starting switch |
| 12/14/1993 | US5270910 Neon light box |
| 12/14/1993 | US5270620 High frequency resonant converter for operating metal halide lamps |