| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 03/03/1999 | EP0641510B1 Electrodeless discharge lamp including impedance matching and filter network |
| 03/03/1999 | CN2309685Y Electronic glow starter for daylight lamp |
| 03/03/1999 | CN2309684Y Acoustooptic control energy-saving lamp base |
| 03/03/1999 | CN2309645Y Universal electronic holder for new and old tubular lamp |
| 03/03/1999 | CN1209940A 电路装置 Circuit means |
| 03/03/1999 | CN1209904A Inductive tuners for microwave driven discharge lamps |
| 03/02/1999 | US5878290 Camera provided with red-eye phenomenon preventing feature |
| 03/02/1999 | US5877926 Common mode ground fault signal detection circuit |
| 03/02/1999 | US5877596 Universal electronic ballast for a family of fluorescent lamps |
| 03/02/1999 | US5877595 High power factor ballast circuit with complementary converter switches |
| 03/02/1999 | US5877592 Programmed-start parallel-resonant electronic ballast |
| 02/25/1999 | WO1999009464A1 Low-voltage high-efficiency fluorescent signage, particularly exit sign |
| 02/25/1999 | WO1998053649A3 Ballast |
| 02/25/1999 | CA2301288A1 Low-voltage high-efficiency fluorescent signage, particularly exit sign |
| 02/24/1999 | CN2309029Y Relay stroboscopic lamp |
| 02/24/1999 | CN1209035A Electronic fluorescent lamp and lamp group |
| 02/23/1999 | US5875357 Lens-fitted photo film unit and electronic flash device for use therewith |
| 02/23/1999 | US5875107 Inverter apparatus |
| 02/23/1999 | US5874810 Electrodeless lamp arrangement wherein the excitation coil also forms the primary of the feedback transformer used to switch the transistors of the arrangement |
| 02/23/1999 | US5874809 For maintaining the output of an electronic ballast |
| 02/23/1999 | CA2037131C Ac battery supply for railroad crossing gate |
| 02/18/1999 | WO1999008492A1 Method for operating a direct current metal halogen arc lamp and circuit pertaining thereto |
| 02/18/1999 | WO1999008491A1 Method and device for producing series of impulse voltages to operate discharge lamps and circuit pertaining thereto |
| 02/18/1999 | WO1999008490A1 Method for producing impulse voltage sequences to operate discharge lamps and circuit pertaining thereto |
| 02/18/1999 | WO1999008373A2 Voltage regulation scheme for power supply having a voltage-fed inverter |
| 02/18/1999 | DE19733302A1 Flashlamp operating method e.g for copier |
| 02/17/1999 | CN2308222Y Capacity fluorescent lamp ballast |
| 02/17/1999 | CN2308221Y Ballast, transformer with double protection |
| 02/17/1999 | CN2308220Y Safety protection cover of electronic ballast |
| 02/17/1999 | CN2308219Y Electronic ballast for fluorescent lamp |
| 02/17/1999 | CN1208500A Lampholder and lighting unit comprising a lampholder |
| 02/16/1999 | US5872431 Efficient power transfer in electronic ballast |
| 02/16/1999 | US5872430 Single switch electronic ballast with low in-rush current |
| 02/16/1999 | US5872429 Coded communication system and method for controlling an electric lamp |
| 02/16/1999 | US5872427 Glowswitch starter with specific glass envelope composition |
| 02/11/1999 | WO1999007192A1 Circuit arrangement |
| 02/11/1999 | WO1999007191A1 Ballast |
| 02/11/1999 | WO1999007190A1 Variable high frequency lamp controllers and systems |
| 02/11/1999 | WO1998047324A3 Safety-enhanced transformer circuit |
| 02/11/1999 | DE19733939A1 Fluorescent lamp dimming circuit |
| 02/10/1999 | EP0896500A2 Process for generating a reference signal for a control device for obtaining a quick light-on of high-pressure discharge lamps |
| 02/10/1999 | CN2307428Y Improved ballast for fluorescent lamp |
| 02/10/1999 | CN2307427Y 电子镇流器 Electronic Ballast |
| 02/10/1999 | CN2307426Y Combined switch capable of increasing service life of fluorescent lamp tube |
| 02/10/1999 | CN2307425Y Straight tube fluorescent lamp integral electronic ballast lamp holder |
| 02/09/1999 | US5869937 High efficiency electronic ballast |
| 02/09/1999 | US5869936 Strobe device |
| 02/09/1999 | US5869935 Electronic ballast with inverter protection circuit |
| 02/04/1999 | WO1999005894A1 Circuit arrangement |
| 02/04/1999 | WO1999005893A1 Electronic ballast system |
| 02/04/1999 | WO1999005892A1 Process for generating voltage pulse sequences and circuit assembly therefor |
| 02/04/1999 | WO1999005891A1 Auxilliary lighting control circuit and method for a hid lamp lighting system |
| 02/04/1999 | WO1999005890A1 Low-voltage non-thermionic ballast-free fluorescent light system and method |
| 02/04/1999 | WO1999005889A1 An electronic ballast for a gas discharge lamp |
| 02/04/1999 | WO1999005700A1 High-voltage discharge lamp, high-voltage discharge lamp device, and lighting device |
| 02/04/1999 | WO1998051133A3 Circuit arrangement for operating a discharge lamp |
| 02/04/1999 | CA2297255A1 Electronic ballast system |
| 02/04/1999 | CA2297248A1 An electronic ballast for a gas discharge lamp |
| 02/04/1999 | CA2285378A1 Low-voltage non-thermionic ballast-free fluorescent light system and method |
| 02/03/1999 | EP0894345A1 Electrical connector and electrical connecting component for use therein |
| 02/03/1999 | CN2306629Y Electronic ballast for fast starting energy-saving fluorescent lamp |
| 02/03/1999 | CN1207236A Circuit arrangement |
| 02/02/1999 | US5866993 Three-way dimming ballast circuit with passive power factor correction |
| 02/02/1999 | US5866991 Induction lamp with oppositely oriented coil winding layers |
| 02/02/1999 | US5866989 Circuit arrangement for operating a discharge lamp |
| 01/28/1999 | WO1999004605A1 Discharge lamp |
| 01/28/1999 | CA2296390A1 Discharge lamp |
| 01/27/1999 | EP0893943A1 Inverter for a gas discharge lamp and stepwise variable frequencies |
| 01/27/1999 | EP0893040A1 Ballast |
| 01/27/1999 | EP0893039A1 Ballast circuit |
| 01/27/1999 | CN1206544A Circuit device for operating high-pressure discharge lamp, illuminator with high-pressure discharge lamp and operating device for high-pressure discharge lamp thereof |
| 01/26/1999 | US5864461 Compact fluorescent lamp adapter |
| 01/26/1999 | US5864212 Control system for providing power to a gas discharge lamp |
| 01/21/1999 | WO1999003311A2 Circuit arrangement |
| 01/21/1999 | WO1999003310A2 Electronic ballast |
| 01/21/1999 | CA2266024A1 Electronic ballast |
| 01/20/1999 | EP0771518B1 Electrical power control system |
| 01/20/1999 | CN2305029Y Composite ballast for fluorescent light |
| 01/20/1999 | CN2305000Y Inserting energy saving electronic ballast |
| 01/20/1999 | CN1041787C Frequency-modulated converter with series parallel resonance |
| 01/19/1999 | US5861718 ARC lamp igniter apparatus and method |
| 01/19/1999 | US5861717 Lighting system for controlling the color temperature of artificial light under the influence of the daylight level |
| 01/14/1999 | WO1999002020A1 Circuit arrangement |
| 01/14/1999 | WO1999002019A1 Ignitor free discharge tube lighting apparatus |
| 01/14/1999 | WO1999002018A1 Circuit arrangement |
| 01/14/1999 | WO1999001934A1 Half bridge circuit drive without collector bias current peak |
| 01/13/1999 | EP0891123A1 A device for operating a gas-discharge lamp, particularly for motor vehicles |
| 01/13/1999 | EP0890977A1 Electrodeless lamp having compensation loop for suppression of magnetic interference |
| 01/13/1999 | CN2304226Y Electronic ballast for sodium lamp |
| 01/13/1999 | CN2304225Y High-efficient energy-saved electronic ballast for fluorescent lamp |
| 01/13/1999 | CN2304224Y Low-voltage starting light-regulator for fluorescent lamp |
| 01/13/1999 | CN1205161A Circuit apparatus |
| 01/13/1999 | CN1205115A Piezo-electric transformer |
| 01/13/1999 | CN1204853A Filament power supply circuit for vacuum fluorescent display tube |
| 01/13/1999 | CN1041675C Power source device |
| 01/13/1999 | CN1041674C Power source device |
| 01/13/1999 | CN1041655C Bias lighting circuit for LCD |
| 01/12/1999 | US5859507 Circuit arrangement for starting and operating a high-pressure gas discharge lamp operating by controlled alternating current |
| 01/12/1999 | US5859505 Method and controller for operating a high pressure gas discharge lamp at high frequencies to avoid arc instabilities |
| 01/12/1999 | US5859504 Lamp ballast circuit with cathode preheat function |