| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 05/13/1993 | WO1993009649A1 Lamp brightness control circuit with ambient light compensation |
| 05/13/1993 | DE4136486A1 High power gas discharge lamp ballast for ignition and operation of lamp - uses bridge stage switched between DC mode for lamp ignition and AC mode for subsequent operation of lamp |
| 05/13/1993 | CA2123226A1 Lamp brightness control circuit with ambient light compensation |
| 05/12/1993 | EP0541344A1 Luminaire including an electrodeless discharge lamp as a light source |
| 05/12/1993 | EP0540924A1 Ballast for starting and operating high pressure discharge lamps |
| 05/12/1993 | CN2133124Y Light-regulating, electric-saving ballast for fluorescent lamp |
| 05/12/1993 | CN2133122Y Multifunction starter for fluorescent lamp |
| 05/12/1993 | CN2133121Y Quick start ballast for fluorescent lamp |
| 05/12/1993 | CN2133120Y Electronic starter for fluorescent lamp |
| 05/12/1993 | CN2133119Y Induction ballast with super-heat protector |
| 05/11/1993 | US5210471 Controlled-current lamp starting ciruit |
| 05/11/1993 | US5210470 Low power on-off control of electronic ballast |
| 05/11/1993 | CA1317629C Electronic ballast for fluorescent lamps |
| 05/05/1993 | EP0540191A2 Electrodeless high intensity discharge lamps |
| 05/05/1993 | CN2132378Y Energy-saving ballast for fluorescent lamp |
| 05/05/1993 | CN2132377Y Device capable of increasing service life of fluorescent lamp |
| 05/05/1993 | CN2132376Y Glow starter holder for fluorescent lamp |
| 05/05/1993 | CN2132375Y Low voltage starting switch for fluorescent lamp |
| 05/05/1993 | CN2132285Y 无电极高频扫描霓虹灯 No neon electrode high-frequency scanning |
| 05/05/1993 | CN2132258Y Self-starting energy-saving ballast |
| 05/05/1993 | CN1020536C Fluorescent light functional extender apparatus |
| 05/05/1993 | CA2080176A1 Luminaire including an electrodeless discharge lamp as a light source |
| 05/04/1993 | US5208515 Protection circuit for stabilizer for discharge apparatus |
| 05/04/1993 | US5208511 Fluorescent lamp electrode disconnect arrangement |
| 05/01/1993 | CA2077776A1 Electrodeless high intensity discharge lamp excitation coil and ballast configuration for maximum efficiency |
| 04/27/1993 | US5206644 System and method for extending the life of aircraft anti-collision lights |
| 04/27/1993 | US5206564 Circuit for controlling light output of a discharge lamp |
| 04/22/1993 | DE4217822A1 Switching circuit for HF low pressure discharge lamp - uses series oscillator resonated at characteristic frequency for lamp ignition |
| 04/22/1993 | DE4134036A1 Luminaire unit with sockets for gas discharge lamp(s) - has clamps either side of core for connection to external wiring connected across core by electric lead |
| 04/22/1993 | DE4134027A1 Series connected device, e.g. for lamps, with integral auxiliary lead - forms galvanised connection between two clamps arranged either side of ferromagnetic core |
| 04/21/1993 | EP0537394A1 A means of periodic change and alternating tube power receiption DC polarity for driving a fluorescent light or lighting apparatus |
| 04/21/1993 | CN2130316Y Incandescent fluorescent lamp |
| 04/20/1993 | US5204587 Fluorescent lamp power control |
| 04/19/1993 | CA2069777A1 Controlled current lamp starting circuit |
| 04/15/1993 | WO1993007732A1 Circuit for driving a gas discharge lamp load |
| 04/14/1993 | EP0536886A2 High frequency luminous tube power supply having neon-bubble and mercury-migration suppression |
| 04/14/1993 | EP0536877A1 Timed power saving device |
| 04/14/1993 | EP0536577A1 Discharge tube and control of an apparatus provided with same |
| 04/14/1993 | EP0536535A1 Discharge-lamp lighting apparatus |
| 04/14/1993 | CN2130025Y High efficient power saving brocken filament fluorescent lamp |
| 04/14/1993 | CN2130024Y Magnetic saturated voltage stabilizing daylight lamp ballast |
| 04/14/1993 | CN2130023Y Micro computer controlled neon lamp |
| 04/14/1993 | CN2130022Y Tube protector for electronic daylight lamp starter |
| 04/13/1993 | US5202892 Pulse forming and delivery system |
| 04/13/1993 | US5202608 Emergency lighting system utilizing improved and rapidly installable fluorescent inverter |
| 04/13/1993 | US5202607 Adapter for fluorescent lamps |
| 04/13/1993 | CA1316210C Excitation supply for gas discharge tubes |
| 04/08/1993 | DE4232737A1 Electronic flash unit for photographic camera - uses series circuit of 2 or more flash tubes coupled to respective auxiliary storage capacitors |
| 04/08/1993 | DE4132229A1 Microcomputer-controlled analyser for optimising a multi-cell battery - has relay selection networks, filter stage and voltage measurement system |
| 04/07/1993 | EP0535911A1 Operating circuit arrangement for a discharge lamp |
| 04/07/1993 | CN2129502Y Power saving ballast |
| 04/07/1993 | CN2129501Y High efficient electronic starter |
| 04/06/1993 | US5200672 Circuit containing symetrically-driven coil for energizing electrodeless lamp |
| 04/06/1993 | US5200671 Filament-free lamp tube structure |
| 04/01/1993 | WO1993006650A1 Single-stage electrical conversion device |
| 04/01/1993 | WO1993006579A1 System and method for extending the life of aircraft anti-collision lights |
| 03/31/1993 | EP0534839A1 Control and monitoring process for a lighting equipment |
| 03/31/1993 | EP0534793A1 Emergency lighting apparatus |
| 03/31/1993 | EP0534728A1 Compact discharge lamp with thermal management characteristics |
| 03/31/1993 | EP0534727A1 Electronic ballast arrangement for a compact fluorescent lamp |
| 03/31/1993 | EP0534280A1 Ballast for starting and operating high-pressure electric discharge lamps |
| 03/31/1993 | CN2129030Y Inductance ballast |
| 03/30/1993 | US5198728 Operating circuit for a discharge lamp |
| 03/30/1993 | US5198727 Acoustic resonance operation of xenon-metal halide lamps on unidirectional current |
| 03/30/1993 | US5198726 Electronic ballast circuit with lamp dimming control |
| 03/27/1993 | CA2076127A1 Electronic ballast arrangement for a compact fluorescent lamp |
| 03/27/1993 | CA2076126A1 Compact discharge lamp having improved thermal management characteristics |
| 03/24/1993 | EP0532832A1 A power supply unit for discharge lamps |
| 03/24/1993 | CN1070304A Durable non-contact starter for fluorescent lamp |
| 03/23/1993 | US5196766 Discharge circuit for flash lamps including a non-reactive current shunt |
| 03/19/1993 | CA2067320A1 Power supply unit for discharge lamps |
| 03/18/1993 | WO1993005629A1 Device for low consumption operation of fluorescent lamps, and fluorescent lamp therefor |
| 03/18/1993 | WO1993005628A1 Circuitry for operating fluorescent lamps with no stroboscopic effects |
| 03/16/1993 | US5194889 Flashing device |
| 03/16/1993 | US5194781 Control circuit |
| 03/11/1993 | DE4129966A1 Einrichtung fuer den energie-sparbetrieb von leuchtstofflampen Means for the energy-saving mode of fluorescent lamps |
| 03/10/1993 | EP0530603A1 Circuit for operating a lamp |
| 03/09/1993 | US5192897 Electronic high frequency controlled device for operating gas discharge lamps |
| 03/09/1993 | US5192896 Variable chopped input dimmable electronic ballast |
| 03/04/1993 | WO1993004570A1 Frequency-modulated converter with a series-parallel resonance |
| 03/04/1993 | WO1993004569A1 Device for operating a gas-discharge lamp |
| 03/04/1993 | WO1993004478A1 Heat sensitive mechanical adjusting apparatus |
| 03/03/1993 | EP0529901A1 Dual feedback control for a high-efficiency class-D power amplifier circuit |
| 03/03/1993 | EP0529551A1 Converter with minimum reactive power transfered to the load |
| 03/03/1993 | CN2127814Y Quick-charging and power-saving flash lamp |
| 03/03/1993 | CN2127806Y Means for changing incandescents to energy-saving efficient lamps |
| 03/02/1993 | US5191266 Circuit and method for controlling luminous intensity of discharge lamps |
| 03/02/1993 | US5191263 Ballast circuit utilizing a boost to heat lamp filaments and to strike the lamps |
| 03/02/1993 | US5191262 Extra cost-effective electronic ballast |
| 03/02/1993 | US5191261 Switching power supply for high-voltage flash lamps |
| 03/01/1993 | CA2076834A1 Fluorescent lamp electrode disconnect arrangement |
| 02/25/1993 | DE4234358A1 Driving gas discharge or fluorescent lamp - using frequency modulated supply from DC or AC source with centre frequency between 15 and 100 kHz |
| 02/24/1993 | EP0528769A2 A self-pulsing circuit for operating a gas-discharge lamp, particularly for use in a motor vehicle |
| 02/24/1993 | EP0528482A1 Control circuits for gas discharge lamp with grid |
| 02/24/1993 | CN2127539Y Adjusting saving starter |
| 02/23/1993 | US5189344 Solid state strobe tube control circuit with programmable flash pattern |
| 02/23/1993 | US5189343 High frequency luminous tube power supply having neon-bubble and mercury-migration suppression |
| 02/23/1993 | US5189342 Parallel-tuned electronic ballast |
| 02/23/1993 | US5189340 Fluorescent lamp assebmly for image scanner |
| 02/23/1993 | US5188444 Vehicular headlamp |