| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 04/10/1990 | CA1267686A1 Load control circuit |
| 04/04/1990 | EP0361748A1 Power control circuit for discharge lamp and method of operating same |
| 04/04/1990 | EP0361665A2 Power circuit |
| 04/04/1990 | CN2055663U Double 9 wh type high-efficient, energy-saving fluorescent lamp |
| 04/04/1990 | CN2055662U Low-voltage quick glow starter for daylight lamp |
| 04/04/1990 | CN2055661U Device for preventing early black of emergency fluorescent lamp |
| 04/04/1990 | CN1041078A Power control circuit for inductive loads |
| 04/04/1990 | CN1041072A Notch cutting circuit with minimal power dissipation |
| 04/03/1990 | US4914558 Series resonant inverter and method of lamp starting |
| 04/03/1990 | US4914356 Controller for gas discharge lamps |
| 04/03/1990 | US4914355 D.C. voltage supply circuit for fluorescent lamps |
| 04/03/1990 | US4914354 Reactor-type ballast circuit |
| 03/29/1990 | DE3832235A1 Controllable alternating current source having sine-wave current for gas-discharge gaps |
| 03/29/1990 | DE3831390A1 Car-ashtray-accumulator-onboard and flashing luminaire, called ABL |
| 03/28/1990 | EP0360156A2 Power supply |
| 03/28/1990 | EP0359860A1 Device and method for operating at least one discharge lamp |
| 03/28/1990 | EP0222823B1 Flash tube simmer circuitry for a film video player electronic strobe light |
| 03/28/1990 | EP0221972B1 Protection circuit for an inverter |
| 03/28/1990 | CN2055316U Low-voltage safety power supply for neon lamps |
| 03/28/1990 | CN2055315U Inductance-electronic ballast |
| 03/28/1990 | CN2055314U Semiwave-rectifier glow starter for fluorescent lamp |
| 03/27/1990 | US4912375 Energizing arrangement for a discharge lamp |
| 03/27/1990 | US4912374 Discharge lamp driving circuit |
| 03/27/1990 | US4912371 Power saving fluorescent lamp substitute |
| 03/27/1990 | US4912370 Glow discharge starter containing cylindrical capacitor |
| 03/27/1990 | US4912368 Cold cathode discharge tube with series connected capacitor |
| 03/27/1990 | CA1267188A1 Metal vapor lamp having low starting voltage |
| 03/21/1990 | EP0359210A2 Inverter having a broad output-control range |
| 03/21/1990 | CN2054968U High efficiency electronic fluorescent lamp starter |
| 03/21/1990 | CN2054967U Automatic pole-changing switch specially used for fluorescent lamp |
| 03/21/1990 | CN1040724A Lighting supply circuit |
| 03/21/1990 | CN1040723A Design of energy-saxing multitube household lighting device |
| 03/20/1990 | US4910440 Electronic constant power ballast for arc lamps |
| 03/20/1990 | US4910439 Luminaire configuration for electrodeless high intensity discharge lamp |
| 03/20/1990 | US4910438 Wide band, high efficiency simmer power supply for a laser flashlamp |
| 03/20/1990 | US4910437 High-pressure discharge lamp |
| 03/20/1990 | CA1266929A1 Power source device for driving liquid crystal |
| 03/20/1990 | CA1266879A1 Circuit arrangement for operating a high-pressure sodium discharge lamp |
| 03/15/1990 | DE3911758A1 Discharge lamp operating circuit - with fuse provided by temp. monitor for choke coil using bimetallic disc to operate cut-out switch |
| 03/15/1990 | DE3830361A1 Laser using gas-discharge lamps for supply of energy - feeds laser-active medium, with AC mains connected directly to lamps or via AC-DC mains unit with fixed or adjustable frequency |
| 03/14/1990 | EP0358502A1 Ballast circuit |
| 03/14/1990 | EP0358462A2 Excitation coil for HID lamps |
| 03/14/1990 | CN2054610U Electronic starting ballast for fluorescent |
| 03/13/1990 | US4908552 Electronic flash unit |
| 03/13/1990 | US4908551 DC/AC bridge circuit |
| 03/08/1990 | WO1990002476A1 Power control circuit for inductive loads |
| 03/08/1990 | WO1990002475A1 Time delay initialization circuit |
| 03/08/1990 | WO1990002474A1 Notch cutting circuit with minimal power dissipation |
| 03/08/1990 | DE3843344C1 Film-viewing device |
| 03/07/1990 | EP0357453A1 A discharge tube arrangement |
| 03/07/1990 | EP0356818A2 Circuitry for driving a load |
| 03/07/1990 | CN2054252U Automatic sodium lamp protecting igniter |
| 03/07/1990 | CN2054250U Power-saving high-efficiency ballast of fluorescent lamp |
| 03/07/1990 | CN2054207U Fluorescent lamp apparatus without tungsten filament |
| 03/06/1990 | US4906899 Fluorescent lamp regulating system |
| 02/28/1990 | EP0356288A1 Method and device for back-lighting a liquid-crystal matrix screen |
| 02/28/1990 | EP0355698A2 Electrical power supply, fusing apparatus and recording apparatus using the same |
| 02/28/1990 | CN2053835U Matching apparatus for energy-saving, prolonged service life and stepless light controlling fluorescent lamp |
| 02/28/1990 | CN2053787U Electronic compound low-voltage non-bounceing bulb switch |
| 02/28/1990 | CN1007035B Regulatable dc power supply for the operation of a gas discharge radiator |
| 02/27/1990 | US4904907 Ballast circuit for metal halide lamp |
| 02/27/1990 | US4904906 Fluorescent light dimming |
| 02/27/1990 | US4904905 Dual resonant frequency arc lamp power supply |
| 02/27/1990 | US4904904 Electronic transformer system for powering gaseous discharge lamps |
| 02/27/1990 | US4904903 Ballast for high intensity discharge lamps |
| 02/27/1990 | CA1266308A1 Fitting for compact electric discharge lamps |
| 02/21/1990 | CN2053422U Fluorescent lamp set |
| 02/21/1990 | CN2053288U Portable mining lamp with high lighting power |
| 02/21/1990 | CN1039927A Alternating current ballast |
| 02/20/1990 | US4902943 Plug-in starting aid |
| 02/20/1990 | US4902942 Controlled leakage transformer for fluorescent lamp ballast including integral ballasting inductor |
| 02/20/1990 | US4902939 Display circuit |
| 02/20/1990 | US4902938 Electronic ballast with high voltage protection |
| 02/20/1990 | US4902932 Socket-adapter stabilizing device for miniature fluorescent lamps |
| 02/14/1990 | CN2053009U Multi-lamp igniter for fluorescent lamp with high power saving feature |
| 02/14/1990 | CN2053008U Power saving electronic ballast for high voltage sodium lamp |
| 02/14/1990 | CN2053007U Electric inductive multi-fluorescent lamps ballast |
| 02/14/1990 | CN2053006U 万能日光灯开关 Universal lamp switch |
| 02/13/1990 | US4900990 Method and apparatus for energizing a gaseous discharge lamp using switched energy storage capacitors |
| 02/13/1990 | US4900986 Ballast circuit for starting fluorescent lamps |
| 02/08/1990 | WO1990001248A1 A circuit arrangement for a power supply unit |
| 02/07/1990 | EP0353382A1 Driving circuitry for a low-pressure discharge lamp |
| 02/07/1990 | EP0146599B1 Electronic photoflash control circuit |
| 02/06/1990 | US4899092 Juxtaposed discharge tubes with opposed trigger electrodes |
| 02/06/1990 | US4899088 Power control circuit for inductive loads |
| 02/06/1990 | US4899087 Triggering circuit for series connected flash lamps |
| 02/06/1990 | US4899085 Igniting device for a high-pressure discharge lamp capable of battery voltage compensation |
| 02/06/1990 | CA1265577A1 Electrical control system and driver |
| 02/06/1990 | CA1265576A1 Transient control circuit for fluorescent lamp systems |
| 01/31/1990 | EP0352703A1 Electronic ballast |
| 01/31/1990 | CN2052182U Universal electronic ballast for fluorescent lamp |
| 01/31/1990 | CN2052101U High-officiency fluorescent lamp with built-in battery |
| 01/30/1990 | US4897684 Auto-flash photographing system |
| 01/24/1990 | CN2051810U Inner triggering gas discharge lamp |
| 01/24/1990 | CN1039150A Gas discharge lamp with an excitation source |
| 01/23/1990 | US4896079 Control mechanism for fluorescent lighting unit |
| 01/23/1990 | US4896078 Distributed ballasting system for sun tanning apparatus |
| 01/23/1990 | US4896077 Ignitor disabler |
| 01/17/1990 | EP0351012A2 Fluorescent lamp controllers |
| 01/17/1990 | CN2051396U Rectifier-free and filament-free fluorescent lamp |