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Class Information
Number: 315/DIG.7
Name: Electric lamp and discharge devices: systems > Starting and control circuits for gas discharge lamp using transistors

Patents under this class:

Patent Number Title Of Patent Date Issued
8513903 Discharge lamp lighting device Aug. 20, 2013
8441203 Dimming electronic ballast for true parallel lamp operation May. 14, 2013
8441200 Electronic ballast and method for operating at least one first and second discharge lamp May. 14, 2013
8441197 Method of striking a lamp in an electronic dimming ballast circuit May. 14, 2013
RE44133 Fixed operating frequency inverter for cold cathode fluorescent lamp having strike frequency adjusted by voltage to current phase relationship Apr. 9, 2013
8378592 End of lamp life protection circuit with bi-level detections for the electronic ballast and method thereof Feb. 19, 2013
8324813 Electronic ballast with frequency independent filament voltage control Dec. 4, 2012
8288956 Lamp preheat circuit for a program start ballast with filament voltage cut-back in steady state Oct. 16, 2012
8269421 Lighting controllers Sep. 18, 2012
8232746 High pressure discharge lamp lighting device and lighting fixture using the same Jul. 31, 2012
8228006 High pressure discharge lamp lighting device and lighting fixture using the same Jul. 24, 2012
8169149 Circuit arrangement and method for the operation of at least one discharge lamp May. 1, 2012
8089220 Circuit arrangement and method for operating a high-pressure discharge lamp Jan. 3, 2012
8076864 Circuit configuration for starting and operating at least one discharge lamp Dec. 13, 2011
8063670 High voltage high side transistor driver Nov. 22, 2011
8058811 HID lamp ballast circuit Nov. 15, 2011
8022635 CCFL controller with multi-function terminal Sep. 20, 2011
8018174 Safety circuit for electro-luminescent lamp ballast Sep. 13, 2011
8008869 Discharge lamp lighting device, control method for the same, and projector Aug. 30, 2011
8008865 Multiple failure detection shutdown protection circuit for an electronic ballast Aug. 30, 2011
7994733 Discharge lamp lighting device and light fixture Aug. 9, 2011
7924064 Inverter circuit Apr. 12, 2011
7888889 Protection for external electrode fluorescent lamp system Feb. 15, 2011
7812546 Circuit structure for driving a plurality of cold cathode fluorescent lamps Oct. 12, 2010
7728527 Energy saving power supply circuit Jun. 1, 2010
7683678 Inverter circuit Mar. 23, 2010
7646152 Full-bridge and half-bridge compatible driver timing schedule for direct drive backlight system Jan. 12, 2010
7619447 High voltage high side transistor driver Nov. 17, 2009
7598677 Multiple failure detection shutdown protection circuit for an electronic ballast Oct. 6, 2009
7589476 Power supply for external electrode fluorescent lamps Sep. 15, 2009
7586270 Circuit and method for the operation of miniature high pressure short-arc lamps using alternating current Sep. 8, 2009
7560874 Electronic ballast with improved inverter startup circuit Jul. 14, 2009
7554273 Protection for external electrode fluorescent lamp system Jun. 30, 2009
7531970 Power source driving circuits and controllers thereof May. 12, 2009
7531965 Discharge centering lamp lighting device May. 12, 2009
7479742 Discharge lamp lighting circuit Jan. 20, 2009
7477021 Non-discontinuous neon power supply with high power factor Jan. 13, 2009
7474064 Lamp driving circuit for a discharge lamp and a control method thereof Jan. 6, 2009
7459867 Program start ballast Dec. 2, 2008
7443103 High pressure lamp with lamp flicker suppression and lamp voltage control Oct. 28, 2008
7439687 Discharge lamp lighting circuit Oct. 21, 2008
7436124 Voltage fed inverter for fluorescent lamps Oct. 14, 2008
7425802 Discharge lamp lighting apparatus, luminaire and illumination system Sep. 16, 2008
7425777 Lighting circuit Sep. 16, 2008
7417381 Discharge lamp lighting circuit Aug. 26, 2008
7411360 Apparatus and method for striking a fluorescent lamp Aug. 12, 2008
7405522 Multiple failure detection shutdown protection circuit for an electronic ballast Jul. 29, 2008
7400100 Discharge-lamp lighting apparatus and projector Jul. 15, 2008
7388336 Discharge lamp driving circuit having a signal detection circuit therein Jun. 17, 2008
7385361 Ballast for high-pressure discharge lamp and method of operating the same Jun. 10, 2008

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