| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
|---|
| 02/26/1991 | US4996465 Variable color lighting device |
| 02/26/1991 | US4996464 Ignitor disabler |
| 02/26/1991 | US4996463 Auxiliary lighting system for high intensity discharge lamp |
| 02/26/1991 | US4996462 Electronic ballast for fluoroscent lamps |
| 02/21/1991 | WO1991002443A1 Dual resonant frequency arc lamp power supply |
| 02/21/1991 | WO1991002442A1 Process for igniting a gas-discharge lamp |
| 02/21/1991 | WO1991002441A1 Process for adapting the light intensity of summation light to external light |
| 02/20/1991 | CN2071861U Automatic electricity-saving controller with low voltage glow-starting function |
| 02/20/1991 | CN2071860U Regulating electricity-saving switch for fluorescent lamp |
| 02/20/1991 | CN2071859U Glow starter |
| 02/19/1991 | US4994718 Method and means for dimming ballasted lamps |
| 02/19/1991 | US4994717 Electronic stabilizer for a fluorescent lamp |
| 02/19/1991 | US4994716 Circuit arrangement for starting and operating gas discharge lamps |
| 02/15/1991 | CA2023193A1 Four lamp fluorescent wiring arrangement |
| 02/13/1991 | EP0412130A1 Device for igniting gas-discharge lamps |
| 02/13/1991 | CN1049262A High-efficient large power delay starter for fluorescent lamp |
| 02/12/1991 | US4992923 Electrical power supply, fusing apparatus and recording apparatus using the same |
| 02/12/1991 | US4992705 Fluorescent lighting system |
| 02/12/1991 | US4992702 Inverter capable of controlling operating frequency |
| 02/07/1991 | DE3925654A1 Control unit for discharge lamp(s) - has switches in series connected to DC circuit and diode in parallel in blocking direction |
| 02/06/1991 | EP0411618A2 Electronic ballast for gas discharge lamps |
| 02/06/1991 | EP0411617A2 Method of lighting discharge lamp and discharge lamp lighting apparatus |
| 02/06/1991 | EP0410966A1 Solid state electronic ballast. |
| 02/06/1991 | CN2070972U Low voltage dc high efficient energy saving fluorescent lamp |
| 02/06/1991 | CN2070971U Induced capacity starting ballast for fluorescent lamp |
| 02/06/1991 | CN2070970U Domestic ac-dc double purpose emergency lamp |
| 02/05/1991 | WO1991002400A1 Feeding device for converters, free of harmonic distortion |
| 02/05/1991 | US4990830 Disconnecting fluorescent lamp filaments |
| 02/05/1991 | US4990789 Ultra violet rays generator by means of microwave excitation |
| 02/05/1991 | CA2037927A1 Feeding device for converters, free of harmonic distortion |
| 01/30/1991 | EP0410484A1 Process for adapting the total light intensity to the outside light intensity |
| 01/30/1991 | CN2070522U Energy-saving ballast |
| 01/30/1991 | CN2070521U Starterless fluorescent switch |
| 01/29/1991 | US4988925 Omnidirectional metal halide arc discharge lamp |
| 01/29/1991 | US4988922 Power supply for microwave discharge light source |
| 01/29/1991 | US4988920 High-frequency power circuit for gas discharge lamps |
| 01/29/1991 | US4988918 Mercury, rare gas, and halogen; small diameter; brightness; semiconductors |
| 01/23/1991 | EP0409328A2 A switched bridge circuit |
| 01/23/1991 | CN2070078U Source adjustable illuminating lamp device |
| 01/23/1991 | CN2070077U Double tube fluorescent lamp without ballast |
| 01/23/1991 | CN2070076U Power-saving universal electronic ballast |
| 01/23/1991 | CN2070075U Capacity sensitive ballast |
| 01/23/1991 | CN2070074U Power-economizing electronic ballast |
| 01/23/1991 | CN2070073U Ac/dc fluorescent lamp |
| 01/23/1991 | CN1048748A Energy-saving safe lighting lamp for work on machine-tool |
| 01/23/1991 | CN1048747A Ac/dc desk lamp with functions of saving energy and regulating luminosity |
| 01/22/1991 | US4987347 Lamp driver circuit |
| 01/22/1991 | US4987344 Arc discharge lamp with internal starter |
| 01/17/1991 | DE4021420A1 One-sided compact fluorescent lamp with secure contact - has slots for press fittings in neck of threaded pedestal contg. stress relief notch for one connecting lead |
| 01/17/1991 | DE4020878A1 Headlamp control circuit for vehicle - has separate lamps for dipped beam and full beam and with progressive changeover in beam settings |
| 01/17/1991 | DE3922024A1 Battery-powered lamp for vehicular and domestic uses - has provision for recharging of nickel-cadmium cells via choice of alternative plug-terminated electrical leads |
| 01/17/1991 | DE3921389A1 Series equipment with booster for discharge lamp lighting - allows temporary increase in brightness by supply of substantially higher power with indication of booster engagement |
| 01/16/1991 | EP0408534A2 Phase switched power controller |
| 01/16/1991 | EP0408121A2 Circuit arrangement |
| 01/16/1991 | CN2069611U Stater omitted energy-saving switch for fluorescent |
| 01/16/1991 | CN2069609U Automatic power-off switch for fluorescent on outage |
| 01/15/1991 | US4985725 Auto-flash photographing system |
| 01/15/1991 | US4985664 Electronic ballast with high power factor |
| 01/15/1991 | US4985662 Low voltage lamp switcher circuit |
| 01/11/1991 | CA2020767A1 Circuit arrangement |
| 01/11/1991 | CA2020766A1 Multi-tap primary coil for gas discharge lamps |
| 01/10/1991 | DE4017731A1 Opto electric pulse convertor esp. for photographic flash - is based on phototransistor delivering HF AC to emitter follower with base AC short-circuit |
| 01/09/1991 | EP0406285A1 Circuit arrangement for monitoring the duty cycle of a transistor |
| 01/09/1991 | CN2069194U Electronic ballast starter for fluorescent light lamp |
| 01/09/1991 | CN2069193U Ballast of energy saving for fluorescent light lamp |
| 01/09/1991 | CN2069192U Elecronic ballast of light effect for fluorescent light lamp |
| 01/09/1991 | CN1048479A Fluorescent lamp controllers with dimming control |
| 01/08/1991 | US4983889 Discharge lamp using acoustic resonant oscillations to ensure high efficiency |
| 01/08/1991 | US4983888 Fluorescent lamp device |
| 01/08/1991 | US4983887 Controlled series-resonance-loaded ballast |
| 01/08/1991 | CA1278818C Glow discharge starter |
| 01/03/1991 | DE4014355A1 Electronic operating circuit for discharge lamp - has short-circuit switch for auxiliary sec. winding of heating transformer |
| 01/02/1991 | EP0406116A1 Process and device for dimming a fluorescent lamp of an LCD backlight |
| 01/02/1991 | EP0405715A1 Lamp starting circuit |
| 01/02/1991 | EP0405674A1 Switching arrangement |
| 01/02/1991 | CN2068640U Safety mark lamp |
| 01/01/1991 | US4982140 Starting aid for an electrodeless high intensity discharge lamp |
| 01/01/1991 | US4982137 Apparatus for igniting a discharge lamp including circuitry for preventing cataphoresis phenomenon generation |
| 12/31/1990 | CA2019628A1 Dimming method and device for fluorescent lamps used for backlighting of liquid crystal screens |
| 12/27/1990 | EP0404593A1 Luminaire for an electrodeless high intensity discharge lamp |
| 12/27/1990 | EP0403667A1 Electronic switching ballast for a fluorescent lamp |
| 12/26/1990 | CN1048139A Electronic ballast system for fluorescent lamps |
| 12/25/1990 | US4980612 Energy-saving ballast for electric gas discharge lamps |
| 12/25/1990 | US4980611 Overvoltage shutdown circuit for excitation supply for gas discharge tubes |
| 12/19/1990 | CN1047954A 开关式电源 Switching Power Supplies |
| 12/18/1990 | US4978892 Flash discharge |
| 12/18/1990 | US4978891 Electrodeless lamp system with controllable spectral output |
| 12/18/1990 | US4978890 Fluorescent lamp device |
| 12/18/1990 | CA1278024C Electronic constant power ballast for arc lamps |
| 12/12/1990 | EP0401931A1 Switch mode power supply |
| 12/12/1990 | EP0401278A1 A circuit for starting and operating a gas discharge lamp. |
| 12/12/1990 | CN2067472U Glow starter |
| 12/11/1990 | US4977354 Electrodeless low-pressure discharge lamp |
| 12/05/1990 | CN1047602A Electronic starter |
| 12/04/1990 | US4975625 Electrodeless lamp which couples to small bulb |
| 12/04/1990 | US4975624 Spark gap device particularly suited for a rapid restrike circuit for metal halide lamps |
| 11/29/1990 | WO1990014746A1 Discharge lamp unit with variable light intensity |
| 11/29/1990 | WO1990014745A1 Process and control cirucit for regulating the luminous intensity of tubular lamps with two incandescent filaments |
| 11/28/1990 | EP0399835A1 Supply circuits for discharge lamps |
| 11/28/1990 | EP0399613A2 Fluorescent lamp controllers with dimming control |