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Class Information
Number: 315/274
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply > Discharge control discharge device load > Transformer in the control circuit
Description: Systems provided with a transformer connected in the control circuit of the discharge device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7605544 |
Current balancing circuit |
Oct. 20, 2009 |
| 7592753 |
Inductively-powered gas discharge lamp circuit |
Sep. 22, 2009 |
| 7593241 |
Hybrid power supply system |
Sep. 22, 2009 |
| 7586268 |
Apparatus and method for controlling the filament voltage in an electronic dimming ballast |
Sep. 8, 2009 |
| 7586269 |
Device for driving light source module |
Sep. 8, 2009 |
| 7573207 |
Driver system and method with multi-function protection for cold-cathode fluorescent lamp and external-electrode fluorescent lamp |
Aug. 11, 2009 |
| 7569998 |
Striking and open lamp regulation for CCFL controller |
Aug. 4, 2009 |
| 7567041 |
Discharge lamp lighting apparatus and projector |
Jul. 28, 2009 |
| 7564200 |
Discharge lamp lighting circuit with frequency control in accordance with phase difference |
Jul. 21, 2009 |
| 7560879 |
Method and apparatus for DC to AC power conversion for driving discharge lamps |
Jul. 14, 2009 |
| 7557516 |
Resonant inverter |
Jul. 7, 2009 |
| 7550929 |
Power system and method for driving plural lamps |
Jun. 23, 2009 |
| 7541746 |
Lamp driver circuit with power factor correction circuit coupled to direct-current to direct-current power converter |
Jun. 2, 2009 |
| 7541751 |
Soft start control circuit for lighting |
Jun. 2, 2009 |
| 7531967 |
Flashlamp drive circuit |
May. 12, 2009 |
| 7528552 |
Power transformer combined with balance windings and application circuits thereof |
May. 5, 2009 |
| 7525257 |
Device for driving light sources |
Apr. 28, 2009 |
| 7492107 |
Device for driving light source module |
Feb. 17, 2009 |
| 7479740 |
Module for parallel lighting and balancer coil for discharge lamp |
Jan. 20, 2009 |
| 7468586 |
Ballast with arc protection circuit |
Dec. 23, 2008 |
| 7459865 |
Cold cathode tube lighting device, tube current detecting circuit used in cold cathode tube lighting device, tube current controlling method and integrated circuit |
Dec. 2, 2008 |
| 7439689 |
Lamp driving device having impedance component detecting abnormal discharge |
Oct. 21, 2008 |
| 7436129 |
Triple-loop fluorescent lamp driver |
Oct. 14, 2008 |
| 7432666 |
Cold cathode fluorescent lamp driving system |
Oct. 7, 2008 |
| 7397198 |
Fluorescent lamp driver and liquid crystal display apparatus |
Jul. 8, 2008 |
| 7397196 |
Circuit arrangement for preventing high peak currents |
Jul. 8, 2008 |
| 7391165 |
Discharge lamp lighting control device |
Jun. 24, 2008 |
| 7378802 |
Discharge lamp lighting circuit |
May. 27, 2008 |
| 7372212 |
Lamp, method of driving the lamp, backlight assembly and liquid crystal display device having the backlight assembly |
May. 13, 2008 |
| 7365500 |
Display device having lamp control circuit |
Apr. 29, 2008 |
| 7352140 |
Master-slave control architecture for inverters |
Apr. 1, 2008 |
| 7348735 |
Lamp driver |
Mar. 25, 2008 |
| 7332874 |
Discharge lamp ignition device |
Feb. 19, 2008 |
| 7332873 |
Electrical circuit for fluorescent lamps |
Feb. 19, 2008 |
| 7332868 |
Discharge lamp lighting device |
Feb. 19, 2008 |
| 7327094 |
Circuit arrangement and method for operating at least one electric lamp |
Feb. 5, 2008 |
| 7321205 |
Method and a controller to control power supply to a CCFL |
Jan. 22, 2008 |
| 7319296 |
Device for driving lamps |
Jan. 15, 2008 |
| 7315136 |
Protection apparatus and multi-lamp driving system using the same |
Jan. 1, 2008 |
| 7312587 |
Control device for high intensity discharge bulb and method of controlling high intensity discharge bulb |
Dec. 25, 2007 |
| 7310246 |
Capacitor charging circuit and strobe apparatus comprising same |
Dec. 18, 2007 |
| 7307388 |
Backlight modules and lamp modules in flat panel displays |
Dec. 11, 2007 |
| 7298097 |
Driver system and method with multi-function protection for cold-cathode fluorescent lamp and external-electrode fluorescent lamp |
Nov. 20, 2007 |
| 7288901 |
Ballast with arc protection circuit |
Oct. 30, 2007 |
| 7279852 |
Apparatus and method for striking a fluorescent lamp |
Oct. 9, 2007 |
| 7274155 |
Flash lamp drive circuit |
Sep. 25, 2007 |
| 7271545 |
Ballast and igniter for a lamp having larger storage capacitor than charge pump capacitor |
Sep. 18, 2007 |
| 7271547 |
High-pressure discharge lamp having a pulse starting device, and operating method for a high pressure discharge lamp |
Sep. 18, 2007 |
| 7271548 |
Multi-lamp drivers and transformers thereof |
Sep. 18, 2007 |
| 7262558 |
Lamp current control device |
Aug. 28, 2007 |
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