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Class Information
Number: 315/121
Name: Electric lamp and discharge devices: systems > With automatic shunt and/or cutout > Plural load device systems
Description: Systems, having a plurality of load devices connected in the system.

Sub-classes under this class:

Class Number Class Name Patents
315/122 Series connected load devices 85

Patents under this class:

Patent Number Title Of Patent Date Issued
8653735 Backlight module of liquid crystal display device Feb. 18, 2014
8653736 Multiple channel light source power supply with output protection Feb. 18, 2014
8648537 Methods and apparatus for driving LED-based lighting units Feb. 11, 2014
8643282 Driving device for lighting fixture Feb. 4, 2014
8638038 System for reprogramming power parameters for light emitting diodes Jan. 28, 2014
8611057 LED module for sign channel letters and driving circuit Dec. 17, 2013
8598811 Projection-type display device and method of controlling thereof Dec. 3, 2013
8587203 Multiple channel light source power supply with output protection Nov. 19, 2013
8581497 Electronic ballast circuit and method for detecting removal of parallel connected lamp filaments in low level dimming Nov. 12, 2013
8581498 Control of bleed current in drivers for dimmable lighting devices Nov. 12, 2013
8564206 LED lighting device and illumination apparatus including same Oct. 22, 2013
8564155 Multiple output power supply Oct. 22, 2013
8552652 Lighting device, manufacturing method thereof, and electronic apparatus Oct. 8, 2013
8531128 Electrical circuit for driving LEDs in dissimilar color string lengths Sep. 10, 2013
8487537 LED drive circuit Jul. 16, 2013
8384291 Backlight protection circuit Feb. 26, 2013
8132933 Power blackout bulb Mar. 13, 2012
8098015 Lamp operation device and image display device Jan. 17, 2012
8008864 Single LED string lighting Aug. 30, 2011
7986107 Electrical circuit for driving LEDs in dissimilar color string lengths Jul. 26, 2011
7973670 Display device and method for inspecting the same Jul. 5, 2011
7859192 Method for operating high-pressure lamps without hotstarting and luminaire having two high-pressure discharge lamps Dec. 28, 2010
7629751 Electrical compensation and fault tolerant structure for light emitting device array Dec. 8, 2009
7307385 Boost controller capable of step-up ratio control Dec. 11, 2007
7261458 Semiconductor chip with container and contact elements for use in a light socket Aug. 28, 2007
6870328 LED lamp apparatus for vehicles Mar. 22, 2005
6828732 Fluorescent lamp end-of-life protection circuit Dec. 7, 2004
6538448 Determining remaining operating life of fluorescent lamp Mar. 25, 2003
6400095 Process and device for the detection of the rectifier effect appearing in a gas discharge lamp Jun. 4, 2002
5936359 Apparatus for efficient remote ballasting of gaseous discharge lamps Aug. 10, 1999
5886423 Electric series circuit Mar. 23, 1999
5777439 Detection and protection circuit for fluorescent lamps operating at failure mode Jul. 7, 1998
5606224 Protection circuit for fluorescent lamps operating at failure mode Feb. 25, 1997
5574335 Ballast containing protection circuit for detecting rectification of arc discharge lamp Nov. 12, 1996
5504396 Discharge lamp control system Apr. 2, 1996
5397963 Subsystem and method for detecting lamp failure Mar. 14, 1995
5089753 Arrangement for predicting failure in fluorescent lamp systems Feb. 18, 1992
5081399 Power supply systems for neon lights Jan. 14, 1992
4912372 Power circuit for series connected loads Mar. 27, 1990
4912371 Power saving fluorescent lamp substitute Mar. 27, 1990
4570109 Irradiation device Feb. 11, 1986
4398126 Protected low-pressure discharge lamp operating circuit Aug. 9, 1983
4210846 Inverter circuit for energizing and dimming gas discharge lamps Jul. 1, 1980

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