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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 |
| 6515436 |
Discharge lamp lighting apparatus and lighting appliance employing same |
Feb. 4, 2003 |
| 6504318 |
Supply coupling of a fluorescent lamp |
Jan. 7, 2003 |
| 6501234 |
Sequential burst mode activation circuit |
Dec. 31, 2002 |
| 6498441 |
Method for coloring mixing of hid lamps operated at VHF frequencies using duty cycle modulation |
Dec. 24, 2002 |
| 6495970 |
Lamp stand with multi-stage light modulation |
Dec. 17, 2002 |
| 6495969 |
Series-resonant ballast having overload control |
Dec. 17, 2002 |
| 6492780 |
Lamp ballast system |
Dec. 10, 2002 |
| 6489730 |
Discharge-lamp illumination circuit |
Dec. 3, 2002 |
| 6483253 |
Light source |
Nov. 19, 2002 |
| 6472827 |
Parallel-resonant inverter-type fluorescent lamp ballast |
Oct. 29, 2002 |
| 6472876 |
Sensing and balancing currents in a ballast dimming circuit |
Oct. 29, 2002 |
| 6459213 |
Ballast for parallel-connected lamps |
Oct. 1, 2002 |
| 6448720 |
Circuit for driving an HID lamp |
Sep. 10, 2002 |
| 6445141 |
Power supply for gas discharge lamp |
Sep. 3, 2002 |
| 6433490 |
Electronic ballast for at least one low-pressure discharge lamp |
Aug. 13, 2002 |
| 6426597 |
Circuit arrangement for operating gas discharge lamps |
Jul. 30, 2002 |
| 6424097 |
Projection lamp safety interlock apparatus and method |
Jul. 23, 2002 |
| 6420836 |
Switching arrangement |
Jul. 16, 2002 |
| 6420837 |
Antenna driver with constant peak current |
Jul. 16, 2002 |
| 6417629 |
Push-pull based voltage-clamping electronic ballast |
Jul. 9, 2002 |
| 6414447 |
Discharge lamp lighting device and illuminating device |
Jul. 2, 2002 |
| 6384543 |
Switching device |
May. 7, 2002 |
| 6366027 |
Circuit device for operating a discharge lamp by means of a high-frequency current |
Apr. 2, 2002 |
| 6366032 |
Fluorescent lamp ballast with integrated circuit |
Apr. 2, 2002 |
| 6362576 |
Circuit arrangement for igniting a lamp |
Mar. 26, 2002 |
| 6359391 |
System and method for overvoltage protection during pulse width modulation dimming of an LCD backlight inverter |
Mar. 19, 2002 |
| 6356034 |
Low voltage discharge lamp power supply |
Mar. 12, 2002 |
| 6356035 |
Deep PWM dimmable voltage-fed resonant push-pull inverter circuit for LCD backlighting with a coupled inductor |
Mar. 12, 2002 |
| 6351082 |
Electronic ballast for a fluorescent lamp |
Feb. 26, 2002 |
| 6339296 |
Low profile emergency ballast |
Jan. 15, 2002 |
| 6329761 |
Frequency controlled half-bridge inverter for variable loads |
Dec. 11, 2001 |
| 6323600 |
Process for generating voltage pulse sequences and circuit assembly therefor |
Nov. 27, 2001 |
| 6323603 |
Resonant flyback ignitor circuit for a gas discharge lamp control circuit |
Nov. 27, 2001 |
| 6317347 |
Voltage feed push-pull resonant inverter for LCD backlighting |
Nov. 13, 2001 |
| 6316881 |
Method and apparatus for controlling a discharge lamp in a backlighted display |
Nov. 13, 2001 |
| 6313585 |
Method for dimming a fluorescent lamp arranged in the secondary circuit of a transformer and arrangement to implement said method |
Nov. 6, 2001 |
| 6310444 |
Multiple lamp LCD backlight driver with coupled magnetic components |
Oct. 30, 2001 |
| 6294881 |
Discharging tube with piezoelectric substrate |
Sep. 25, 2001 |
| 6271633 |
High power factor electronic ballast with fully differential circuit topology |
Aug. 7, 2001 |
| 6255783 |
Gas discharge lamp power supply with feed forward compensation for input voltage variations |
Jul. 3, 2001 |
| 6246173 |
Free-running oscillator circuit with simple starting circuit |
Jun. 12, 2001 |
| 6242867 |
Circuit for synchronizing the ignition of electronic ballast discharge lamps |
Jun. 5, 2001 |
| 6239559 |
Light source using dielectric barrier discharge lamp |
May. 29, 2001 |
| 6236168 |
Ballast instant start circuit |
May. 22, 2001 |
| 6233162 |
Compounded power factor corrected universal display monitor power supply |
May. 15, 2001 |
| 6225760 |
Fluorescent lamp dimmer system |
May. 1, 2001 |
| 6225751 |
Fluorescent lamp drive circuit of an image formation apparatus |
May. 1, 2001 |
| 6222325 |
Fluorescent lamp control circuit |
Apr. 24, 2001 |
| 6215256 |
High-efficient electronic stabilizer with single stage conversion |
Apr. 10, 2001 |
| 6208089 |
Discharge-lamp lighting circuit |
Mar. 27, 2001 |
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