Patents
Sitemap › H05 - Electric techniques not otherwise provided for › H05B - Electric heating; Electric lighting not otherwise provided for › H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps
Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100)
11/1990
11/28/1990EP0399428A2 Rare gas discharge fluorescent lamp device
11/28/1990EP0399288A2 Discharge lamp using acoustic resonant oscillations to ensure high efficiency
11/28/1990EP0399201A1 Flashlight warning system
11/28/1990CN2066643U Switch special for fluorescent lamp
11/28/1990CN1047429A Switching arrangement
11/28/1990CN1010652B Energy-economizing and durable daylight lamp
11/28/1990CN1010651B Programmable multiple controller on wall
11/28/1990CA2017409A1 Fluorescent lamp controllers with dimming control
11/27/1990US4973887 Four lamp fluorescent wiring arrangement
11/27/1990US4973886 Four lamp fluorescent ballast means
11/27/1990US4973885 Low voltage direct current (DC) powered fluorescent lamp
11/27/1990US4973882 Transformerless power circuit
11/27/1990CA1276964C Electrodeless fluorescent lighting system
11/22/1990EP0398526A1 Improved power supply circuit for a gaseous discharge tube device
11/22/1990EP0398432A1 Switching arrangement
11/22/1990DE3941799A1 Discharge lamp contg. mercury vapour among inert gases - eliminates physiological damage by limitation of ranges of wavelength and colour temp. under e.g. electronic control
11/22/1990CA2017129A1 Rare gas discharge fluorescent lamp device
11/21/1990CN2066223U Charging electronic fluorescent desk lamp for alternating current and direct current
11/21/1990CN2066222U Electronic starting current-limiting unit for fluorescent lamp
11/20/1990US4972126 Ballasting system for fluorescent lamps
11/20/1990US4972125 Plug-in dimmer module for lighting control systems
11/20/1990US4972124 Electronic ballast inverter
11/20/1990US4972123 Power-reducing circuit for fluorescent and for high-intensity incandescent lighting fixtures
11/20/1990US4972122 Fluorescent display tube head-up display apparatus eliminating a heated filament image of fluorescent display tube
11/18/1990CA2014374A1 Gas discharge lamp dimming system
11/15/1990WO1990013988A1 Electronic ballast for discharge lamps
11/14/1990EP0397334A1 A method of operating an arc discharge lamp
11/14/1990EP0396621A1 Fluorescent dimming ballast utilizing a resonant sine wave power converter
11/13/1990US4970441 Brightness stabilizing control of a VF display
11/13/1990US4970439 Power supply circuit for a gaseous discharge tube device
11/13/1990US4970438 Electronic fluorescent lamp ballasting system
11/13/1990US4970437 Chopper for conventional ballast system
11/12/1990WO1990013940A1 Supply voltage circuit with controllable output power
11/12/1990CA2064009A1 Supply voltage circuit with controllable output power
11/07/1990EP0396011A2 Preflash pseudofocus/exposure control system
11/07/1990EP0395776A1 Electronic ballast
11/07/1990CN2065388U Electronic starter for fluorescent lamp
11/07/1990CN2065387U Multi-functional electronic ballast
11/07/1990CN2065386U Power-economizing ballast for use in double lamp
11/06/1990WO1990013879A1 Location marker
11/06/1990US4968917 Electronic dimmer control for vacuum fluorescent display devices
11/06/1990CA2054194A1 Location marker
11/01/1990CA2014018A1 Preflash pseudofocus/exposure control system
10/1990
10/31/1990EP0395159A1 DC/AC converter for the supply of two gas and / or vapour discharge lamps
10/31/1990EP0394966A2 Power supply
10/31/1990CN2064976U Light adjustable energy-saving capacitive ballast for fluorescent lamp
10/31/1990CN2064975U Voltage multiplier type electricity-saving ballast for fluorescent lamp
10/31/1990CN2064974U Explosion-proof energy-saving electronic starter for under mine fluorescent lamp
10/31/1990CN2064973U Helix starting device for fluorescent lamp
10/31/1990CN2064972U Transformer starting device for fluorescent lamp
10/31/1990CN2064971U Ballast plug-in board for fluorescent lamp's electronic ballast
10/30/1990CA1275688C Two capacitor apparatus for sequential starting and operation of multiple series connected discharge lamps
10/28/1990CA2013032A1 Power supply circuit for a gaseous discharge tube device
10/24/1990EP0393900A2 A discharge tube arrangement
10/24/1990EP0393449A1 Fluorescent lamp
10/23/1990US4965494 Capacitor charging circuit for timing light power source
10/23/1990US4965493 Electric arrangement for igniting and supplying a gas discharge lamp
10/18/1990WO1990012479A1 A method in the operation of a drive device for electric discharge lamps and a drive device
10/18/1990DE3912457A1 Fluorescent lamps LP discharge arranged in circuit - has lamps power matched across current dependent variable resistances and switching elements to give energy saving of about thirty per cent
10/17/1990EP0392834A1 Ballast circuits for gas discharge lamps
10/17/1990EP0392770A2 Ballast circuits for discharge lamps
10/17/1990CN2064148U Ac electronic ballast of fluorescent lamp
10/17/1990CN2064147U Synchronous self-excited ballast of fluorescent lamp
10/17/1990CN2064146U Multifunction ballast of fluorescent lamp
10/17/1990CN2064145U Electronic ballast of fluorescent lamp with protector
10/17/1990CN2064144U High efficient electricity saver
10/17/1990CN2064143U Lighting series fluorescent lamp ballast
10/17/1990CN2064006U Field start fluorescent camp rack
10/16/1990US4963797 Ballast assembly
10/16/1990US4963795 Step-controllable electronic ballast
10/14/1990CA2014608A1 Ballast circuits for gas discharge lamps
10/14/1990CA2014606A1 Ballast circuits for discharge lamps
10/13/1990WO1990012478A1 Adaptive resonant ballast for discharge lamps
10/13/1990CA2031190A1 Adaptive resonant ballast for discharge lamps
10/11/1990DE4007913A1 ACtivating auxiliary flash unit outside camera - using integrated flash unit to prevent unintentional activation of auxiliary flash unit by foreign flash light
10/11/1990DE3910809A1 Fluorescent lamp
10/10/1990EP0391470A1 Switching device and high-pressure discharge lamp
10/10/1990EP0391383A1 Ballast for a discharge lamp
10/10/1990EP0391360A1 Ballast for a direct heated discharge lamp
10/10/1990CN2063732U Low voltage glow starting and lightness intensifing device for fluorescent lamp
10/10/1990CN1046080A Circuit arrangements for electronical fluorescent lamp
10/10/1990CN1046049A Electronic flashing device being able to flash continously
10/09/1990US4962336 Ignitor disabler
10/09/1990US4962335 Deuterium lamp voltage supply means
10/05/1990WO1990012417A1 Fluorescent lamp
10/05/1990CA2051447A1 Fluorescent lamp
10/04/1990WO1990011672A1 Device for lighting a discharge lamp
10/04/1990DE3910207A1 Luminous pointer for demonstration purposes
10/03/1990EP0390699A1 Powering circuit for an arclamp, especially for a car headlight
10/03/1990EP0390285A2 Discharge lamp lighting device
10/03/1990EP0389847A2 Circuit
10/03/1990CN2063333U Light regulating and igniting device for high-or low-pressure gas discharging lamp
10/02/1990US4961029 Discharge lamp lighting device
09/1990
09/27/1990DE4009267A1 Gas discharge lamp DC powered operating circuit - has inverter bridge using power switching semiconductor and associated buffer circuits
09/26/1990EP0388492A1 Inverter capable of controlling operating frequency
09/26/1990CN2062936U 电子镇流器 Electronic Ballast
09/26/1990CN1045677A Supply circuit
09/25/1990US4959593 Two-lead igniter for HID lamps
09/25/1990US4959591 Rectifier-inverter circuit with low harmonic feedback, particularly for operation of fluorescent lamps
09/25/1990US4959589 Glow discharge starter having discharge extinguishing means
1 ... 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 ... 351