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Class Information
Number: 315/175
Name: Electric lamp and discharge devices: systems > Plural power supplies > Diverse-type current supplies
Description: Systems wherein two of the sources of current supply are of diverse types.

Sub-classes under this class:

Class Number Class Name Patents
315/176 Simultaneous application to the load device 106

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8159154 Apparatus and method of driving backlight unit and display apparatus employing the same Apr. 17, 2012
7994722 Energy saving control for a fluorescent light in a merchandising machine and a method of retrofitting the control in a merchandising machine Aug. 9, 2011
7466081 Emergency lighting Dec. 16, 2008
7327092 Current driving circuit for inductive loads Feb. 5, 2008
7239041 Light emitting device for vehicles Jul. 3, 2007
6756951 Display apparatus and driving circuit of display panel Jun. 29, 2004
6693390 Load driving apparatus Feb. 17, 2004
6507333 Tribo-addressed and tribo-supperessed electric paper Jan. 14, 2003
5770924 Ignitional run circuit that immediately applies only a DC voltage after lamp ignition but before the main AC potential is applied Jun. 23, 1998
5635800 Ballast circuit with a japped transformer flyback converter providing driving energy for start, glow and run modes of a lamp Jun. 3, 1997
5578906 Field emission device with transient current source Nov. 26, 1996
5498934 Electronic flashlight Mar. 12, 1996
5418433 Flashlight with hybrid battery and electronic control circuit May. 23, 1995
5384516 Information processing apparatus including a control circuit for controlling a liquid crystal display illumination based on whether illuminatio power is being supplied from an AC power source Jan. 24, 1995
5323089 Method for the pulsed mode of operation of high-pressure discharge lamps Jun. 21, 1994
5315215 High-voltage switching circuit May. 24, 1994
5252893 Light flasher apparatus Oct. 12, 1993
5233271 Starting device and lamp base construction for a Philips lamp Aug. 3, 1993
5198727 Acoustic resonance operation of xenon-metal halide lamps on unidirectional current Mar. 30, 1993
5170099 Discharge lamp lighting device Dec. 8, 1992
5144189 Automotive high voltage discharge lighting system and assembly Sep. 1, 1992
5068577 Constant current drive system for fluorescent tubes Nov. 26, 1991
5047695 Direct current (DC) acoustic operation of xenon-metal halide lamps using high-frequency ripple Sep. 10, 1991
5039915 Multipurpose fluorescent light device Aug. 13, 1991
4887007 DC-AC converter for supplying a gas and/or vapour discharge lamp Dec. 12, 1989
4855646 Fluorescent illuminator with inverter power supply Aug. 8, 1989
4812712 Plasma processing apparatus Mar. 14, 1989
4803406 High-pressure discharge lamp operating circuit Feb. 7, 1989
4779026 Rapid-start high-pressure discharge lamp, and method of its operation Oct. 18, 1988
4749908 Emergency power supply Jun. 7, 1988
4749913 Operating circuit for a direct current discharge lamp Jun. 7, 1988
4749914 Circuit system for igniting and operating a high-pressure discharge lamp, particularly a sodium vapor lamp Jun. 7, 1988
4742276 Regulated deuterium arc supply system May. 3, 1988
4704563 Fluorescent lamp operating circuit Nov. 3, 1987
RE32450 Light-sensing, light fixture control system Jun. 30, 1987
4663569 Energy management/dimming system and control May. 5, 1987
4645981 Process and apparatus for the surface treatment of workpieces by glow discharge Feb. 24, 1987
4604552 Retrofit fluorescent lamp energy management/dimming system Aug. 5, 1986
4602193 Method and apparatus for the stabilization of direct current arc lamps Jul. 22, 1986
4591761 Relaxation oscillator synchronizer for pulsed laser operation May. 27, 1986
4587459 Light-sensing, light fixture control system May. 6, 1986
4587460 High-pressure discharge lamp operating circuit May. 6, 1986
4550272 Operating circuit for electric discharge lamp Oct. 29, 1985
4454453 Power source device for ion sources Jun. 12, 1984
4417180 Lamp firing apparatus Nov. 22, 1983
4410930 Photo voltaic lighting for outdoor telephone booth Oct. 18, 1983
4392085 Direct drive ballast with delayed starting circuit Jul. 5, 1983
4385261 Method and apparatus for the execution of gas discharge reactions May. 24, 1983
4286193 Starting and operating circuit for gas discharge lamp Aug. 25, 1981
4238707 Power supply system for a semiconductor light source Dec. 9, 1980

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