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