Patents for H05B 41 - Circuit arrangements or apparatus for igniting or operating discharge lamps (35,100) |
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09/04/1991 | CN2084268U Fluorescent lamp with double tubes |
09/03/1991 | US5046152 Ignition circuit for a gas discharge lamp |
09/03/1991 | US5045760 Neon sign transformer |
09/03/1991 | US5045758 Solid state regulated power supply for luminescent lamp |
09/03/1991 | US5045757 Metal vapor discharge lamp |
08/29/1991 | DE4005850A1 Gas discharge lamp operating circuit - uses cold conductor for switching between pre-heating and lamp ignition |
08/28/1991 | EP0443795A2 Operating gas-discharge light sources |
08/28/1991 | CN2083829U Electronic starter for composite lamp |
08/28/1991 | CN2083828U Electronic recovering device for fluorescent lamp |
08/27/1991 | US5043635 Apparatus for controlling power to a load such as a fluorescent light |
08/27/1991 | US5042139 Method of making an excitation coil for an electrodeless high intensity discharge lamp |
08/21/1991 | EP0442572A1 Circuit arrangement |
08/21/1991 | EP0442286A2 Power factor correction circuit |
08/21/1991 | EP0442216A2 Power supply for vacuum fluorescent displays |
08/21/1991 | CN2083388U Power-saving glow starter of fluorescent lamp |
08/21/1991 | CN2083387U Electronic ballast with self-protective circuit |
08/21/1991 | CN2083386U High-efficient ballast |
08/21/1991 | CA2034714A1 Fluorescent light connector assembly |
08/20/1991 | US5041767 Digital controller for gas discharge tube |
08/20/1991 | US5041766 Power-factor-controlled electronic ballast |
08/20/1991 | US5041765 Negative glow discharge lamp device |
08/20/1991 | US5041763 Circuit and method for improved dimming of gas discharge lamps |
08/20/1991 | US5040964 Apparatus for polymerization of plastic dental material |
08/15/1991 | CA2034799A1 Power factor correction circuit |
08/14/1991 | EP0441253A1 Electronic ballast for gas discharge lamp |
08/14/1991 | EP0440765A1 Feeding device for converters, free of harmonic distortion |
08/14/1991 | CN2082954U Continuously luminance-regulating ballast of high-voltage discharge lamp |
08/14/1991 | CN2082950U Universal fluorescent desk lamp |
08/14/1991 | CN2082949U Low-voltage electronic glow starter for fluorescent lamp |
08/14/1991 | CN2082948U Ballast for double tube self-starting fluorescent lamps |
08/14/1991 | CN2082947U Capacitive electronic ballast for fluorescent lamp |
08/14/1991 | CN2082946U Contactless glow starter for fluorescent lamp |
08/14/1991 | CN2082810U Long-life high-altitude obstacle lamp |
08/13/1991 | US5040185 Large volume gaseous electric discharge system |
08/13/1991 | US5039921 Discharge lamp lighting apparatus for driving discharge lamp according to rating thereof |
08/13/1991 | US5039920 Method of operating gas-filled tubes |
08/13/1991 | US5039919 Control arrangement for electronic ballast |
08/13/1991 | US5039916 Operating circuit for a high-pressure discharge lamp |
08/13/1991 | US5039915 Multipurpose fluorescent light device |
08/13/1991 | US5039914 Dimmer control circuit |
08/13/1991 | US5039908 Tri-model thermal switch and preheat lamp containing same |
08/09/1991 | CA2009750A1 Circuit for starting and operating fluorescent lamps |
08/08/1991 | DE4001840A1 Road vehicle discharge lamp supply transformer - has secondary winding stages coupled in series for voltage summation |
08/07/1991 | EP0440381A2 Improvements relating to electrodeless high intensity discharge lamps |
08/07/1991 | EP0440245A2 Power source circuit |
08/07/1991 | EP0440244A2 Discharge lamp lighting apparatus |
08/07/1991 | EP0439864A1 Circuit arrangement |
08/07/1991 | EP0439863A1 Circuit arrangement |
08/07/1991 | EP0439862A1 Circuit arrangement |
08/07/1991 | EP0439861A1 Circuit arrangement |
08/07/1991 | EP0439606A1 Glow discharge lamp containing thermal switch for producing double hot spots on cathode |
08/07/1991 | EP0439603A1 Tri-model thermal switch and preheat lamp containing same |
08/07/1991 | CN2082508U Emergency lamp with automatic solar ennergy device |
08/07/1991 | CN2082507U Multifunctional electron ballast |
08/07/1991 | CN2082506U Fluorescent lamp switch without ballast |
08/07/1991 | CN2082505U Inductance-capacity ballast of fluorescent lamp with single end inner start |
08/06/1991 | US5038080 Electric flash apparatus |
08/06/1991 | US5038079 Method for controlling fluorescent lamp dimmers and circuit for providing such control |
08/01/1991 | DE4100349A1 Ballast circuit for fluorescent lamp - uses isolated gate bipolar transistor as low-loss switch for capacitors in resonant circuit |
07/31/1991 | EP0439248A2 Lamp ballast |
07/31/1991 | EP0439240A2 Electronic ballast |
07/31/1991 | CN2082067U Electronic neon lamp with low voltage |
07/31/1991 | CN2082065U Multifunction lamp |
07/31/1991 | CN2082064U Electronic light changing device for energy-saving fluorescent lamp |
07/31/1991 | CN2082063U Starter-switch assembly of fluorescent lamp |
07/31/1991 | CN2082062U Ballast of fluorescent lamp with autoformer |
07/31/1991 | CN2082061U Magnetic-leakage pulse ballast with autoformer |
07/31/1991 | CN2082060U Combined switch for multiple lamps |
07/31/1991 | CN1013401B Durable fluorescent lamp |
07/30/1991 | US5036444 High intensity lamp |
07/30/1991 | US5036256 Arc discharge ballast suitable for automotive applications |
07/30/1991 | US5036255 Balancing and shunt magnetics for gaseous discharge lamps |
07/30/1991 | US5036254 Inverter having a broad output-control range |
07/25/1991 | WO1991011017A1 Integrated radio-frequency light source for large scale display |
07/25/1991 | WO1991010984A1 Radio-frequency driven display |
07/25/1991 | WO1991006179A3 Method and apparatus for improving signal to noise ratio in a telecine machine |
07/25/1991 | DE4001549A1 Electronic starter circuit for discharge lamps - has PWM integrated circuit with frequency varied to adjust brightness |
07/24/1991 | EP0437908A1 Electronic capacitive ballast for fluorescent and other discharge lamps |
07/24/1991 | CN2081625U Ballast circuit device using fluorescent lamp waste tube |
07/24/1991 | CN2081624U Mercury-vapour lamp, sodium lamp ballast with glass tube fuse |
07/23/1991 | US5034769 Interchangeable camera and interchangeable flash device |
07/23/1991 | US5034663 Power source for metal halide lamps and the like |
07/23/1991 | US5034662 Apparatus for controlling the charging of a main capacitor of a flash unit |
07/23/1991 | US5034661 Rare gas discharge fluorescent lamp device |
07/23/1991 | US5034660 Method of and apparatus for supplying high frequency alternating current to a fluorescence lamp |
07/23/1991 | US5034657 Thermal-switch instant starter for a fluorescent light |
07/17/1991 | EP0436985A1 Circuit arrangement suitable for igniting a high-pressure discharge lamp |
07/17/1991 | CN2081163U Ntegrated fluorescent lamp holder with electronic ballast |
07/16/1991 | US5032782 Series-connected power-line controller |
07/16/1991 | US5032767 High frequency oscillator-inverter with improved regenerative power supply |
07/16/1991 | US5032765 Operating system for fluorescent lamp array |
07/16/1991 | US5032762 Protective beryllium oxide coating for high-intensity discharge lamps |
07/16/1991 | CA1286353C Ignitor disabler |
07/16/1991 | CA1286352C Thermal protection device for a dual input voltage lamp transformer/ballastapparatus |
07/16/1991 | CA1286351C Glow discharge starter containing radioactive alloy |
07/10/1991 | CN2080740U Multifunction energy-saving electronic multicircuit controller for fluorescent lamp |
07/10/1991 | CN2080739U Under-voltage fast igniting arrangement for fluorescent lamp |
07/10/1991 | CN2080738U 高性能电子镇流器 High-performance electronic ballasts |
07/10/1991 | CN2080737U Glow starter for fluorescent lamp |
07/10/1991 | CN2080720U Energy-saving current regulated power supply for co2 gas laser |