| Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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| 03/07/1989 | US4810936 Failing lamp monitoring and deactivating circuit |
| 03/07/1989 | CA1250889A1 High intensity discharge lamp self-adjusting ballast system with current limiters and a current feedback loop |
| 03/01/1989 | EP0304564A1 Stroboscopic light generator, in particular for medical purposes |
| 03/01/1989 | CN2033568U Universal-type double-tube energy-saving electronic ballast |
| 03/01/1989 | CN2033567U Fluorescent lamp illuminator |
| 03/01/1989 | CN2033566U Electronic transformer of neon lamp |
| 03/01/1989 | CN1031462A Multipurpose energy-saving electric ballast |
| 02/28/1989 | US4808889 Circuit for fluorescent light power supply in a borehole television probe |
| 02/28/1989 | US4808888 Starting circuit for gaseous discharge lamps |
| 02/28/1989 | US4808887 Low-pressure discharge lamp, particularly fluorescent lamp high-frequency operating system with low inductance power network circuit |
| 02/28/1989 | US4808886 Switched capacitive ballasts for discharge lamps |
| 02/23/1989 | WO1989001731A1 Electronic ballast for fluorescent lamps |
| 02/23/1989 | DE3727058A1 Circuit arrangement for adjusting the brightness of lamps |
| 02/21/1989 | US4806994 Semiconductor device |
| 02/21/1989 | US4806830 Device and process for lighting a fluorescent discharge lamp |
| 02/21/1989 | CA1250345A1 Discharge lamp driving circuit |
| 02/14/1989 | CA1250014A1 Gas discharge lamp control |
| 02/09/1989 | WO1989001234A1 Power supply for microwave discharge light source |
| 02/08/1989 | EP0302748A2 Discharge lamp type display device |
| 02/08/1989 | CN2032387U Electronic driver for fluorescent lamp |
| 02/08/1989 | CN1031005A Parallel duplex tube ballast |
| 02/07/1989 | US4803406 High-pressure discharge lamp operating circuit |
| 02/02/1989 | DE3713312A1 Controllable AC source for gas-discharge paths for light production and ozone production |
| 02/01/1989 | CN2031988U Low-voltage soft-starting energy-saving fluorescent lamp |
| 01/31/1989 | US4802073 Lighting level control apparatus for fluorescent lighting installations |
| 01/26/1989 | WO1989000804A1 Power supply circuit for an electric discharge lamp |
| 01/26/1989 | EP0291526A4 Programmable multicircuit wall-mounted controller. |
| 01/26/1989 | DE3823766A1 Method and device for changing the emission properties of an electrodeless lamp |
| 01/25/1989 | CN2031593U Electronic ballast for fluorescent lamp |
| 01/25/1989 | CN2031574U Combined self ballast electron fluorescent lamp with multiple bulbs |
| 01/25/1989 | CN2031566U Rapid switch starter for fluorescent lamp |
| 01/25/1989 | CN2031540U Electronic flasher with power saving and steady flashing potency |
| 01/24/1989 | US4800424 Endoscope light source apparatus with a light emitting timing delaying circuit |
| 01/18/1989 | EP0164774B1 Circuit device for controlling the running voltage of high-pressure gas-discharge lamps |
| 01/18/1989 | EP0155729B1 Circuit device for the ac operation of high-pressure discharge lamps |
| 01/17/1989 | US4798998 Electronically dimmed power limited lighting system |
| 01/17/1989 | US4798996 Electronic photoflash control circuit |
| 01/11/1989 | EP0298934A1 Lighting apparatus |
| 01/11/1989 | EP0298500A2 Flash device |
| 01/11/1989 | EP0298497A2 Flash device |
| 01/11/1989 | CN2030792U Circulation type stroboscopic controller for flash lamp |
| 01/11/1989 | CN2030791U High-efficiency, energy-saving and life-prolonging fluorescent lamp |
| 01/11/1989 | CN2030790U Electric-economizing trigger for fluorescent lamp |
| 01/10/1989 | US4797778 Gas discharge path |
| 01/10/1989 | US4797599 Power control circuit with phase controlled signal input |
| 01/05/1989 | DE3801721A1 Circuit arrangement for operating a fluorescent lamp |
| 01/04/1989 | EP0297692A1 Photocell temperature switch for high intensity discharge lamp fixture |
| 01/04/1989 | CN2030400U Ballast for controlling three fluorescent lamps |
| 01/04/1989 | CN1030170A Photocell temp. switch for high intensity discharge lamp fixture |
| 01/03/1989 | US4795945 Starting circuit for high intensity gaseous discharge lamps |
| 01/03/1989 | CA1248169A1 Fluorescent light unit with dual light levels |
| 12/28/1988 | EP0296558A1 Power supply device for a discharge lamp |
| 12/28/1988 | CN88211621U Electronic ballast |
| 12/28/1988 | CN88211566U Connecting structure of daylight lamp |
| 12/28/1988 | CN88211523U Switch for daylight lamp |
| 12/27/1988 | US4794505 A method of operating a power supply system including inverter stage |
| 12/21/1988 | EP0295491A1 Apparatus for and method of stabilizing the quantity of light of fluorescent lamp |
| 12/21/1988 | CN87204766U Combined switch of daylight lamp |
| 12/21/1988 | CN87104214A Electronic glow starter for daylight lamp |
| 12/21/1988 | CN87103974A Electric source for daylight lamp glow starting |
| 12/20/1988 | US4792730 Circuit for interrupting arc discharge in a gas-discharge vessel |
| 12/20/1988 | US4792729 Fluorescent lamp brightness control |
| 12/20/1988 | US4792727 System and method for operating a discharge lamp to obtain positive volt-ampere characteristic |
| 12/20/1988 | CA1247189A1 Thermal protector for circular fluorescent lamp assembly |
| 12/20/1988 | CA1247188A1 Multiple level dimming circuit for fluorescent lamp |
| 12/14/1988 | EP0294901A1 Switching arrangement |
| 12/14/1988 | EP0294878A1 DC-AC converter for igniting and supplying a gas discharge lamp |
| 12/14/1988 | EP0294605A2 Circuit arrangement for operating a discharge lamp connected to a low-voltage source |
| 12/14/1988 | EP0294604A1 Circuit arrangement for operating a discharge lamp from a low voltage DC-voltage source |
| 12/14/1988 | CN88210361U Start switch for d.c. fluorescent lamp |
| 12/14/1988 | CN88203620U Pulling switch of fluorescent lamps |
| 12/14/1988 | CN88103402A Dc-ac converter for igniting and supplying gas discharge lamp |
| 12/13/1988 | US4791479 Color-image sensing apparatus |
| 12/13/1988 | US4791338 Start-up circuit energized by a direct voltage source |
| 12/07/1988 | EP0293569A2 Power control circuit with phase controlled signal input |
| 12/07/1988 | CN87215153U 荧光灯镇流器 Fluorescent Lamp Ballasts |
| 12/07/1988 | CN87205098U Electricity-saving pullswitch of daylight lamp without starter |
| 12/06/1988 | US4789810 Photocell temperature switch for high intensity discharge lamp fixture |
| 11/30/1988 | EP0293138A1 Low pressure sodium lamps |
| 11/30/1988 | CN87204714U Soft starter for fluorescent lamp |
| 11/30/1988 | CN87204691U Light-regulating energy-saving long-life fluorescent lamp device |
| 11/23/1988 | EP0291526A1 Programmable multicircuit wall-mounted controller. |
| 11/23/1988 | EP0098285B1 Electronic high frequency controlled device for operating gas discharge lamps |
| 11/23/1988 | CN88200368U Tube standard of fluorescent lamp with energy-saving, life-prolonging and quick glow starter |
| 11/22/1988 | US4787022 High voltage power source for a discharge tube |
| 11/22/1988 | CA1245367A1 Gain controlled electronic ballast system |
| 11/17/1988 | WO1988009108A1 Circuit arrangement for operating a gas discharge lamp on a direct current source |
| 11/17/1988 | EP0291223A1 Power supply |
| 11/16/1988 | CN88102588A Energizing arrangement for discharge lamp |
| 11/16/1988 | CN87215263U Ballast with overlap inserted iron core |
| 11/16/1988 | CN87212609U Electronic starter for flurescent lamp |
| 11/16/1988 | CN87212568U High power factor fast-starting ballast for fluorescent lamp |
| 11/09/1988 | EP0290366A1 High frequency lighting system for gas discharge lamps |
| 11/09/1988 | EP0289542A1 Control system for electrical lighting. |
| 11/09/1988 | CN88202953U Electronic light-regulating device for a fluorescent lamp |
| 11/03/1988 | DE3812066A1 Circuit for controlling the luminous flux of fluorescent lamps |
| 11/02/1988 | EP0288924A1 Power supply device for a discharge lamp |
| 11/02/1988 | CN88210133U 综合节能镇流器 Integrated energy-saving ballast |
| 11/02/1988 | CN88201089U Auxiliary power supply for hollow cathode lamp with high performance |
| 11/02/1988 | CN87216325U Multifunction electronic energy-saving ballast for dual fluorescent lamp |