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)
05/1991
05/14/1991CA1284171C Start, hot restart and operating lamp circuit
05/08/1991EP0426201A2 Interchangeable camera and interchangeable flash device
05/08/1991DE4018060A1 Universal car and domestic accumulator light with emergency function - has electronic automatic changeover circuit and slide switch for mains
05/08/1991CN2076735U Electronic rectifier
05/08/1991CN2076734U High-voltage sodium lamp ballast
05/08/1991CN2076710U Energy saving fluorescent lamp with electronic starting switch
05/08/1991CN1051272A Fluorescent light with universal power
05/07/1991US5013977 Ignitor for high pressure arc discharge lamps
05/07/1991US5013976 Electrodeless glow discharge lamp
05/07/1991US5013974 Electronic ballast with improved lamp current crest factor
05/07/1991US5013973 Power supply for intermittently operated loads
05/07/1991US5013970 Peak voltage reducer circuit for fluorescent lamps
05/07/1991US5013253 Fluorescent light connector assembly
05/05/1991CA2028886A1 System for operating a portable lamp
05/01/1991CN2076291U Protection device for electronic ballast
04/1991
04/30/1991US5012161 Power factor correction circuit
04/30/1991CA1283695C Circuit arrangement for operating a high-pressure discharge lamp
04/25/1991WO1991007071A1 Fluorescent tube heating and starting circuit
04/25/1991DE3935331A1 Schaltung zur speisung einer leuchtstoffroehre Circuit for feeding a fluorescent tube
04/24/1991CN2075844U Power saving electronic ballast
04/24/1991CN2075843U Cold cathode sunlight lamp and low voltage starter
04/24/1991CN2075842U Power saving device for gas glow discharge lamp
04/23/1991US5010336 Temporary traffic light control
04/23/1991US5010279 Switched capacitive ballasts for discharge lamps
04/23/1991US5010278 Electronic switching ballast for a fluorescent lamp
04/23/1991US5010277 Electronic converter supplied by an alternating current distribution network
04/23/1991US5010274 Starter circuits for discharge lamps
04/17/1991WO1991006179A2 Method and apparatus for improving signal to noise ratio in a telecine machine
04/17/1991EP0422594A1 Alternating cathode fluorescent lamp dimmer
04/17/1991EP0422255A1 Electronic ballast
04/17/1991EP0422073A1 Electronic ballast
04/16/1991US5008599 Power factor correction circuit
04/16/1991US5008598 Fluorescent lighting control circuit
04/16/1991US5008597 Power network supplied high-frequency low-pressure discharge lamp operating circuit
04/16/1991US5008596 Fluorescent lamp high frequency operating circuit
04/13/1991CA2024743A1 Alternating cathode florescent lamp dimmer
04/11/1991DE4001750A1 Fluorescent lamp operating circuit - supplies lamp with normal current and reduced current in alternation for energy saving operation
04/10/1991CN2074964U Service life prolongable fluorescent lamp tube starter
04/10/1991CN2074963U High-efficient starter
04/09/1991US5006764 Fluorescent lamp ballast with end connector
04/09/1991US5006763 Luminaire for an electrodeless high intensity discharge lamp with electromagnetic interference shielding
04/03/1991EP0420282A1 Inverter circuit for stable illumination of discharge lamp
04/03/1991EP0420251A2 Discharge lamp lighting device having level shift control function
04/03/1991CN2074527U Power-economizing converter of fluorescent lamp
04/03/1991CN2074526U Small-size instantaneous glow starter of fluorescent lamp
04/03/1991CN2074525U Combinational power on-off switch
04/02/1991US5004972 Integrated power level control and on/off function circuit
04/02/1991US5004960 Ignition device for a gas discharge lamp
04/02/1991US5004959 Fluorescent lamp ballast with adjustable lamp current
04/02/1991US5004958 Strobe apparatus
04/02/1991US5004955 Electronic ballast with shock protection feature
04/02/1991US5004954 Current sensing relay
04/02/1991US5004953 Emergency lighting ballast for compact fluorescent lamps with integral starters
04/02/1991US5004947 Fluorescent lamp ballast with high power factor
04/02/1991CA1282452C Energizing arrangement for a discharge lamp
03/1991
03/27/1991EP0418612A1 Fluorescent lamp lighting apparatus
03/27/1991CN1050300A Electronic continuous high efficiency dimming fluorescent lamp
03/26/1991US5003231 Adaptive resonant ballast for discharge lamps
03/26/1991US5003230 Fluorescent lamp controllers with dimming control
03/26/1991US5003229 Flashing device
03/26/1991US5003227 Power distribution for lighting systems
03/21/1991WO1991003919A1 Circuit arrangement for operating a gas discharge lamp
03/20/1991EP0417315A1 Device for lighting a discharge lamp
03/20/1991CN2073640U Electron scanning neon lamp of dc. low volt
03/20/1991CN2073639U High effective electronic glow starter
03/20/1991CN1050120A Dimmer control circuit
03/19/1991US5001401 Dual voltage ballast
03/19/1991US5001400 Power factor correction in electronic ballasts
03/19/1991US5001399 Power supply for vacuum fluorescent displays
03/19/1991US5001394 Glow discharge lamp containing thermal switch for producing double hot spots on cathode
03/19/1991US5001391 Glow discharge starter
03/19/1991US5001386 Circuit for dimming gas discharge lamps without introducing striations
03/13/1991EP0416724A2 Brightness stabilizing control of a VF display
03/13/1991EP0416697A2 Dimmer control circuit
03/13/1991CN2073164U Portable high efficiency d.c fluorecent lamp
03/13/1991CN2073153U Ballast quick starter for electromagnetic fluorecent lamp
03/13/1991CN2073074U Quick starting energy-saving long service fluorescent lamp
03/12/1991US4999663 Flash device
03/12/1991US4999547 Ballast for high pressure sodium lamps having constant line and lamp wattage
03/12/1991US4999546 Starting device for discharge tube
03/12/1991US4999545 Luminaire system
03/12/1991CA1281368C Electric arrangement for regulating the luminous intensity of at least one discharge lamp
03/07/1991WO1991003073A1 Tri-model thermal switch and preheat lamp containing same
03/07/1991WO1991003072A1 Glow discharge lamp containing thermal switch for producing double hot spots on cathode
03/07/1991DE3929029A1 Schaltungsanordnung zum betrieb einer gasentladungslampe Circuit arrangement for operating a gas discharge lamp
03/06/1991EP0415738A2 Discharge lamp systems
03/06/1991EP0415496A2 Circuit for supplying a gas discharge lamp
03/06/1991EP0415490A2 Circuit arrangement for power supply to a load
03/06/1991EP0414840A1 Gas-enclosure lighting device
03/06/1991CN2072756U 电极型荧光灯 Electrode Fluorescent Lamp
03/06/1991CN2072755U Closed structure electronic ballast for fluorescent lamp
03/06/1991CN1049768A Electronic switching ballast for fluorescent lamp
03/05/1991US4998046 Synchronized lamp ballast with dimming
03/05/1991US4998045 Fluorescent lamp dimmer
03/02/1991CA2024507A1 Discharge lamp life and lamp lumen life-extender module, circuitry, and methodology
02/1991
02/27/1991EP0413991A1 Discharge lamp lighting apparatus for driving discharge lamp according to rating thereof
02/27/1991EP0413806A1 Electronic starting and power supply device for preheated electrode fluorescent tubes
02/27/1991CN2072308U Fast electronic ballast for fluorescent lamp
02/27/1991CN2072307U Pen type mercury lamp device
02/26/1991US4996606 Light emitting device and original reading apparatus having the device
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