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Class Information
Number: 315/225
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Periodic switch cut-out
Description: Systems having means provided for rendering the periodic switch inoperative to interrupt the circuit when it is so desired.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619369 |
Method and circuit arrangement for operating a discharge lamp |
Nov. 17, 2009 |
| 7605549 |
System and method for current and/or temperature control of light fixture |
Oct. 20, 2009 |
| 7598682 |
Current regulator apparatus and methods |
Oct. 6, 2009 |
| 7589475 |
Electric lamp with enhanced dependability |
Sep. 15, 2009 |
| 7589480 |
High intensity discharge lamp ballast |
Sep. 15, 2009 |
| 7586267 |
Inverter system and detecting device thereof |
Sep. 8, 2009 |
| 7557515 |
Simplified ballast control circuit |
Jul. 7, 2009 |
| 7545369 |
Methods and apparatus to improve efficiency in cold cathode fluorescent light controllers |
Jun. 9, 2009 |
| 7535184 |
Photopolymerization apparatus |
May. 19, 2009 |
| 7535183 |
Apparatus and method to provide a hybrid linear/switching current source, such as for high-efficiency, wide dimming range light emitting diode (LED) backlighting |
May. 19, 2009 |
| 7531965 |
Discharge centering lamp lighting device |
May. 12, 2009 |
| 7528558 |
Ballast with ignition voltage control |
May. 5, 2009 |
| 7514878 |
High frequency electronic ballast with sine wave oscillator |
Apr. 7, 2009 |
| 7498750 |
Gas discharge lamp driving circuit and method with resonating sweep voltage |
Mar. 3, 2009 |
| 7495398 |
Discharge lamp lighting apparatus |
Feb. 24, 2009 |
| 7486030 |
Universal input voltage device |
Feb. 3, 2009 |
| 7482758 |
Magnetic low voltage dimmer |
Jan. 27, 2009 |
| 7474063 |
Anti-cycling control system for luminaires |
Jan. 6, 2009 |
| 7466083 |
Protective device for vehicle electronic apparatus |
Dec. 16, 2008 |
| 7456587 |
Digital controlled light source driving apparatus |
Nov. 25, 2008 |
| 7456581 |
Power supply, backlight apparatus, and display device |
Nov. 25, 2008 |
| 7449841 |
Charge limited high voltage switch circuits |
Nov. 11, 2008 |
| 7443106 |
Circuit with switch-off device for the operation of light sources |
Oct. 28, 2008 |
| 7429830 |
Power control of a fluorescent lamp |
Sep. 30, 2008 |
| 7420333 |
Mixed mode control for dimmable fluorescent lamp |
Sep. 2, 2008 |
| 7417382 |
High-efficiency adaptive DC/AC converter |
Aug. 26, 2008 |
| 7402960 |
LED-based lamp apparatus |
Jul. 22, 2008 |
| 7397196 |
Circuit arrangement for preventing high peak currents |
Jul. 8, 2008 |
| 7394212 |
Inverter and inverter unit thereof |
Jul. 1, 2008 |
| 7388335 |
Apparatus for providing a sinusoidally amplitude-modulated operating voltage, lighting system and method for generating an amplitude-modulated voltage |
Jun. 17, 2008 |
| 7382093 |
Device for operation of a discharge lamp of the short arc type |
Jun. 3, 2008 |
| 7372214 |
Apparatus and method for driving lamp of liquid crystal display device |
May. 13, 2008 |
| 7352134 |
Lamp containing fixed reverse phase switching power supply with time-based phase pulse triggering control |
Apr. 1, 2008 |
| 7348734 |
Method for protecting a ballast from an output ground-fault condition |
Mar. 25, 2008 |
| 7321206 |
LED driving apparatus |
Jan. 22, 2008 |
| 7315130 |
Switching control for inverter startup and shutdown |
Jan. 1, 2008 |
| 7312588 |
Ballast with frequency-diagnostic lamp fault protection circuit |
Dec. 25, 2007 |
| 7288898 |
Automotive high intensity discharge lamp ballast circuit |
Oct. 30, 2007 |
| 7247996 |
Projector |
Jul. 24, 2007 |
| 7245088 |
Power control circuit for controlling rated power supplied to a load |
Jul. 17, 2007 |
| 7242150 |
Dimmer having a power supply monitoring circuit |
Jul. 10, 2007 |
| 7218062 |
Protective device and a CCFL driving system used thereon |
May. 15, 2007 |
| 7208884 |
Discharge lamp lighting circuit with an open protection circuit |
Apr. 24, 2007 |
| 7208882 |
Lighting device for discharge lamp |
Apr. 24, 2007 |
| 7170235 |
Circuit arrangement with a separate resonant igniter for a high-pressure discharge lamp |
Jan. 30, 2007 |
| 7157862 |
Protection device for a chopping supply and a vehicle lighting device |
Jan. 2, 2007 |
| 7154232 |
Ballast control IC with multi-function feedback sense |
Dec. 26, 2006 |
| 7138769 |
Device for operation of a high pressure discharge lamp and a projector device |
Nov. 21, 2006 |
| 7126287 |
Lamp with integral voltage converter having phase-controlled dimming circuit with fuse-resistor network for reducing RMS load voltage |
Oct. 24, 2006 |
| 7116084 |
Step-up converter having power factor correction |
Oct. 3, 2006 |
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