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Class Information
Number: 315/219
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Periodic switch in the primary circuit of the supply transformer
Description: Systems provided with a transformer connected between the source of supply and the load device for supplying electric current or potential to the load device and having the periodic switch connected in the primary circuit of the transformer so as to periodically interrupt the primary circuit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7253564 |
Lamp current balancing device |
Aug. 7, 2007 |
| 7247991 |
Dimming ballast and method |
Jul. 24, 2007 |
| 7245086 |
Lamp operating circuit and operating method for a lamp having active current measurement |
Jul. 17, 2007 |
| 7242153 |
Pulse width modulation inverter circuit and control method thereof |
Jul. 10, 2007 |
| 7239090 |
Discharge lamp lighting apparatus |
Jul. 3, 2007 |
| 7233114 |
Apparatus for driving lamp of liquid crystal display device |
Jun. 19, 2007 |
| 7233113 |
Power supply system for liquid crystal monitors |
Jun. 19, 2007 |
| 7230391 |
Multi-phase input dimming ballast with flyback converter and method therefor |
Jun. 12, 2007 |
| 7227315 |
Discharge lamp drive apparatus and liquid crystal display apparatus |
Jun. 5, 2007 |
| 7218059 |
Discharge-lamp control device |
May. 15, 2007 |
| 7218060 |
Flyback ballast for fluorescent lamp |
May. 15, 2007 |
| 7218541 |
High efficiency two stage inverter |
May. 15, 2007 |
| 7211965 |
High intensity discharge lamp with current sense resistor |
May. 1, 2007 |
| 7208884 |
Discharge lamp lighting circuit with an open protection circuit |
Apr. 24, 2007 |
| 7208886 |
Apparatus for driving cold cathode fluorescent lamps |
Apr. 24, 2007 |
| 7205725 |
Electronic stabilizer used for hand-held lamp |
Apr. 17, 2007 |
| 7199530 |
Digital ballast |
Apr. 3, 2007 |
| 7187135 |
High intensity discharge lamp electronics controller |
Mar. 6, 2007 |
| 7183722 |
Apparatus and method of driving lamp of liquid crystal display device |
Feb. 27, 2007 |
| 7176638 |
Discharge lamp lighting circuit |
Feb. 13, 2007 |
| 7173380 |
Push-pull driver with null-short feature |
Feb. 6, 2007 |
| 7161305 |
Method and apparatus for single-ended conversion of DC to AC power for driving discharge lamps |
Jan. 9, 2007 |
| 7157862 |
Protection device for a chopping supply and a vehicle lighting device |
Jan. 2, 2007 |
| 7154644 |
Image reader |
Dec. 26, 2006 |
| 7126286 |
Lamp assembly, back light assembly having the same, display device having the same, and method of driving lamps |
Oct. 24, 2006 |
| 7119494 |
Circuit designs and control techniques for high frequency electronic ballasts for high intensity discharge lamps |
Oct. 10, 2006 |
| 7091670 |
Safety interlock apparatus and method |
Aug. 15, 2006 |
| 7084580 |
Discharge lamp lighting circuit |
Aug. 1, 2006 |
| 7084583 |
External electrode fluorescent lamp, back light unit using the external electrode fluorescent lamp, LCD back light equipment using the back light unit and driving device thereof |
Aug. 1, 2006 |
| 7081715 |
Method of providing break-in conditioning for a bi-level illumination system |
Jul. 25, 2006 |
| 7078870 |
Simplified topology for HID lamps |
Jul. 18, 2006 |
| 7078868 |
DC--DC converter and device for operation of a high pressure discharge lamp using said converter |
Jul. 18, 2006 |
| 7078867 |
DC--DC converter and device for operation of a high pressure discharge lamp using said converter |
Jul. 18, 2006 |
| 7075245 |
Driving circuit for multiple cold cathode fluorescent lamps backlight applications |
Jul. 11, 2006 |
| 7075246 |
Discharge lamp illumination circuit |
Jul. 11, 2006 |
| 7067987 |
Electronic ballast with closed loop control using composite current and voltage feedback and method thereof |
Jun. 27, 2006 |
| 7067988 |
Inverter circuit for lighting discharge lamps with reduced power consumption |
Jun. 27, 2006 |
| 7064494 |
Discharge lamp operating apparatus and self-ballasted electrodeless discharge lamp |
Jun. 20, 2006 |
| 7060954 |
Magnetron drive power supply |
Jun. 13, 2006 |
| 7042166 |
Circuit arrangement for operating electric lamps |
May. 9, 2006 |
| 7030572 |
Lighting arrangement |
Apr. 18, 2006 |
| 7023145 |
Backlight inverter for U-Shaped lamp |
Apr. 4, 2006 |
| 7012381 |
DC--DC converter and device for operation of a high pressure discharge lamp using the converter |
Mar. 14, 2006 |
| 6982526 |
Dielectric barrier discharge lamp and method and circuit for igniting and operating said lamp |
Jan. 3, 2006 |
| 6975070 |
Power source apparatus and vehicular lamp |
Dec. 13, 2005 |
| 6972531 |
Method for operating at least one low-pressure discharge lamp |
Dec. 6, 2005 |
| 6963176 |
Discharge lamp operation apparatus |
Nov. 8, 2005 |
| 6958579 |
Thermally-protected ballast for high-intensity-discharge lamps |
Oct. 25, 2005 |
| 6954038 |
Electronic ballast for a discharge lamp |
Oct. 11, 2005 |
| 6933681 |
Circuit arrangement and method for starting and operating discharge lamps |
Aug. 23, 2005 |
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