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)
07/1991
07/10/1991CN1052983A Method for controlling fluorescent lamp dimmers and circuit for providing such control
07/10/1991CN1013166B Dc fluorescent lamp device
07/09/1991US5030892 Means for preventing damage to electronic ballasts as a result of failure of gas discharge lamps
07/09/1991US5030889 Lamp ballast configuration
07/09/1991US5030887 High frequency fluorescent lamp exciter
07/04/1991DE4010112A1 Dual-frequency resonant circuit for discharge lamp ignition - is fed from inverter at upper resonant frequency for starting and lower frequency for continuous operation
07/04/1991DE3943350A1 Gas discharge lamp operating circuit
07/03/1991EP0435628A2 Inverter device
07/03/1991EP0435612A2 Voltage follower circuit for use in power level control circuits
07/03/1991EP0435597A2 Integrated power level control and on/off function circuit
07/03/1991EP0435231A1 Process for dimming discharge tubes
07/03/1991EP0435228A2 Circuit and process for operating (and igniting) a discharge lamp
07/03/1991CN2080290U Multi-purpose electronic high frequency power source
07/03/1991CN2080289U Long life starter of fluorescence lamp
07/03/1991CN2080288U Hibenation general starter of adjustable daylight lamp
07/03/1991CN2080287U Open circuit starter control of fluorescence lamp
07/03/1991CN2080286U High efficient starter
07/03/1991CN2080285U Inductant rapid starter of daylight lamp
07/02/1991US5029311 Elongated
07/02/1991US5029061 Emergency lighting system
07/02/1991US5028862 Voltage follower circuit for use in power level control circuits
07/02/1991US5028846 Single-ended ballast circuit
07/02/1991US5028845 High-pressure series arc discharge lamp construction
07/02/1991US5028844 DC discharge lamp lighting device
06/1991
06/27/1991DE3942425A1 HF igniter with loss compensation for discharge lamp - occupies min. space with components laid out according to criteria of size instead of energy loss
06/27/1991CA2032457A1 Voltage follower circuit for use in power level control circuits
06/27/1991CA2029434A1 Integrated power level control and on/off function circuit
06/26/1991EP0434287A1 Electric discharge lamp and thermal switch starter means therefor
06/26/1991CN2079846U 一种电子镇流器 An electronic ballast
06/26/1991CN2079845U Durable starter for fluorescent lamp
06/26/1991CN2079818U Impedance self-control co2 laser power supply
06/25/1991US5027041 Integrated radio-frequency light source for large scale display
06/25/1991US5027039 Electronic flash apparatus
06/25/1991US5027038 DC/AC converter for the supply of a gas and/or vapor discharge lamp
06/25/1991US5027034 Alternating cathode florescent lamp dimmer
06/25/1991US5027033 Low-pressure discharge lamp
06/25/1991US5027032 Electronically controlled magnetic fluorescent lamp ballast
06/19/1991EP0432845A2 Method for controlling fluorescent lamp dimmers and circuit for providing such control
06/19/1991EP0432670A2 Converter and discharge-lamp operating apparatus using the converter
06/18/1991US5025197 Circuit arrangement for A.C. operation of high-pressure gas discharge lamps
06/12/1991EP0431812A2 Luminous tube protection circuit
06/12/1991EP0431697A1 High-pressure discharge lamp
06/12/1991EP0431696A1 High-pressure discharge lamp
06/12/1991EP0431695A1 High-pressure discharge lamp
06/12/1991EP0431073A1 Time delay initialization circuit
06/12/1991EP0431063A1 Notch cutting circuit with minimal power dissipation
06/12/1991EP0431048A1 Power control circuit for inductive loads
06/12/1991CN2078957U Quick starter of high-voltage sodium lamp
06/12/1991CN2078956U Electronic switch of fluorescent lamp
06/12/1991CA2031809A1 Method for controlling fluorescent lamp dimmers and circuit for providing such control
06/11/1991US5023521 Fluorescent
06/11/1991US5023520 Fluorescent
06/11/1991US5023519 Circuit for starting and operating a gas discharge lamp
06/11/1991US5023518 Electronic
06/11/1991US5023516 Discharge lamp operation apparatus
06/11/1991US5023470 Electronic flash charging circuit
06/11/1991US5022613 AC and battery backup supply for a railroad crossing gate
06/11/1991CA1284815C D.c. voltage supply circuit for fluorescent lamps
06/05/1991EP0430358A1 Circuit arrangement
06/05/1991EP0430357A1 Circuit arrangement
06/05/1991EP0429716A1 Electronic ballast for fluorescent lamps
06/05/1991CN2078515U Integrated energy-saving ballast
06/04/1991US5021717 Operating system for multiple fluorescent lamps
06/04/1991US5021716 Forward inverter ballast circuit
06/04/1991US5021714 Circuit for starting and operating fluorescent lamps
05/1991
05/30/1991WO1991007863A1 Inverters and cathode lamp arrangements
05/29/1991EP0429402A2 A device for supplying power to gas-discharge lamps for use in motor vehicles
05/29/1991EP0429028A2 Ballast for a plurality of discharge lamps
05/29/1991CN2078070U Energy saving ballast of high voltage discharge lamp
05/29/1991CN2078069U High effective electron ballast of fluorescent lamp with power saving function
05/29/1991CN2078068U Inductive type ballast
05/29/1991CN2078040U Three function ceiling switch
05/28/1991US5019959 Discharge tube
05/28/1991US5019751 End-of-life lamp starter disabling circuit
05/28/1991US5019750 Radio-frequency driven display
05/28/1991US5019749 Back-light device for a video display apparatus
05/23/1991DE3938677A1 Fluorescent lamp starter circuit - allows several lamps to be operated from single unit
05/23/1991CA2025094A1 Ballast for supplying a plurality of discharge lamps
05/22/1991CN2077626U Current transformer of neon lamp controlled by ic
05/22/1991CN2077625U Starter of fluorecent lamp
05/22/1991CN2077582U Multifunctional ballast featured by low-voltage starting and light regulating
05/22/1991CN1051655A Fluorescent lamp and electric incandescent lamp combined device
05/22/1991CN1051643A 推挽式逆变器 Push-pull inverter
05/21/1991US5018019 Method and apparatus for improving signal to noise ratio in a telecine machine
05/21/1991US5017840 Ignitor circuit for discharge lamps with novel ballast
05/21/1991US5017834 Simplified gaseous discharge device simmering circuit
05/16/1991WO1991007070A1 Preheater circuit for fluorescent lamps
05/15/1991EP0427709A2 Power control circuit
05/15/1991EP0427346A1 Ballast for one or more external fluorescent lamps and lighting fixture for fluorescent lamps having no ballast apparatus
05/15/1991EP0427042A2 System for operating a portable lamp
05/15/1991EP0426738A1 A circuit arrangement for a power supply unit
05/15/1991CN2077180U Special switch for fluorescent lamp
05/14/1991US5016038 Strobe control apparatus
05/14/1991US5015924 Pupillary efficient lighting system
05/14/1991US5015923 Extra efficient electronic ballast for fluorescent lamps
05/14/1991US5015922 Power supply circuit for a gas discharge lamp
05/14/1991US5015919 Emergency lighting system provided with a fluorescent tube
05/14/1991US5015917 Adaptor for small fluorescent tubes
05/14/1991US5015916 Electric discharge lamp and thermal switch starter means therefor
05/14/1991CA1284172C High wattage hid lamp circuit
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