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Class Information
Number: 315/107
Name: Electric lamp and discharge devices: systems > With cathode or cathode heater supply circuit > Automatic cut-out or voltage regulator in the cathode or heater circuit
Description: Systems provided (1) with means to open the cathode or the cathode heater circuit, or (2) means to regulate the current supplied to the cathode, or the cathode heater circuit, such means being automatically operated in response to some condition.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8558459 Electronic ballast and method for operating an electrical lamp Oct. 15, 2013
8358072 Circuit arrangement, and method for the operation of a fluorescent lamp Jan. 22, 2013
8314557 Light source device, discharge lamp and its control method Nov. 20, 2012
8228000 Circuit arrangement for operating a low-pressure gas discharge lamp and corresponding method Jul. 24, 2012
8203273 Ballast circuit for a gas discharge lamp that reduces a pre-heat voltage to the lamp filaments during lamp ignition Jun. 19, 2012
8138676 Methods and systems for dimmable fluorescent lighting using multiple frequencies Mar. 20, 2012
8106598 Method and apparatus for assuring compliance with high efficiency lighting standards Jan. 31, 2012
8026674 Electron source and method for the operation thereof Sep. 27, 2011
8004199 Method for powering a control circuit for a gas discharge lamp during pre-heating of said lamp, and a device for performing said method Aug. 23, 2011
8004212 Drive apparatus for a vacuum fluorescent display Aug. 23, 2011
7977894 Programmed start ballast for gas discharge lamps Jul. 12, 2011
7800311 Power supply unit, high-frequency circuit system and heater voltage control method Sep. 21, 2010
7629750 Lamp driving device and driving method thereof Dec. 8, 2009
7595490 Charged particle beam emitting device and method for operating a charged particle beam emitting device Sep. 29, 2009
7586730 Electron bombardment heating apparatus and temperature controlling apparatus Sep. 8, 2009
7586098 Ion stripper device made of carbon nanotubes or fullerenes Sep. 8, 2009
7576494 High voltage discharge lamp lighting method, lighting apparatus and image device using that lighting apparatus Aug. 18, 2009
7560868 Ballast with filament heating and ignition control Jul. 14, 2009
7544951 Electron gun assembly Jun. 9, 2009
7355348 Ballast for a discharge lamp having a continuous-operation control circuit Apr. 8, 2008
7339322 Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps Mar. 4, 2008
7268496 Discharge lamp lighting device and lighting system Sep. 11, 2007
7256549 Three electrode arc-discharge lamp Aug. 14, 2007
7199526 Electronic ballast Apr. 3, 2007
7193367 Indirectly heated electrode for gas discharge tube, gas discharge tube with this, and its operating device Mar. 20, 2007
7106008 Flashlight control circuit Sep. 12, 2006
6965237 Device for scanning or detecting electromagnetic waves Nov. 15, 2005
6936970 Method and apparatus for a unidirectional switching, current limited cutoff circuit for an electronic ballast Aug. 30, 2005
6838834 Lighting system and electric power supplier for the same Jan. 4, 2005
6812920 Display device Nov. 2, 2004
6750619 Electronic ballast with filament detection Jun. 15, 2004
6603275 Electronic starter for fluorescent lamps Aug. 5, 2003
6552494 Fluorescent lamp driver circuit Apr. 22, 2003
6504534 CRT display unit and power supply control method therefor Jan. 7, 2003
6495979 Power-saving apparatus and method for computer peripheral devices Dec. 17, 2002
6456009 Adaptive heater voltage algorithm and control system for setting and maintenance of the heater voltage of a vacuum electron device Sep. 24, 2002
6417630 Circuit arrangement Jul. 9, 2002
6404421 Heater voltage generation Jun. 11, 2002
6320319 Charged particle generating apparatus Nov. 20, 2001
6211620 Ballast for fluorescent lamp Apr. 3, 2001
6114810 Electronic ballast circuit for fluorescent lamps which have a high Q factor and high resonance voltage Sep. 5, 2000
6091187 High emittance electron source having high illumination uniformity Jul. 18, 2000
6084355 Circuit for controlling power supplied to a cathode heater of a cathode ray tube Jul. 4, 2000
6008587 Fluorescent lamp electronic ballast control circuit Dec. 28, 1999
5998812 Amplifying-gate thyristor with an increased hold current Dec. 7, 1999
5952832 Diagnostic circuit and method for predicting fluorescent lamp failure by monitoring filament currents Sep. 14, 1999
5923126 Fluorescent lamp electronic ballast with rapid voltage turn-on after preheating Jul. 13, 1999
5854538 Circuit arrangement for electrode pre-heating of a fluorescent lamp Dec. 29, 1998
5841240 Efficient discharge lamp electrode heating circuit operable over wide temperature and power range Nov. 24, 1998
5821696 Method and circuit to start and operate high pressure discharge lamps Oct. 13, 1998

1 2 3 4

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