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Class Information
Number: 315/247
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply > With power factor control device
Description: Systems having combined therewith means designed to alter the power factor of the system.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7626341 |
Discharge lamp lighting apparatus |
Dec. 1, 2009 |
| 7626342 |
High efficiency power controller for solid state lighting |
Dec. 1, 2009 |
| 7626346 |
LED circuit with current control |
Dec. 1, 2009 |
| 7619904 |
Pulse signal drive circuit |
Nov. 17, 2009 |
| 7615941 |
Apparatus and method for maximizing the longevity of arc tube bulbs during pulsing operation |
Nov. 10, 2009 |
| 7615940 |
Gate driver topology for maximum load efficiency |
Nov. 10, 2009 |
| 7612505 |
Liquid crystal display backlight inverter |
Nov. 3, 2009 |
| 7613020 |
Discharge lamp ballast apparatus comprising DC/DC converters having at least two transformers and outputting two kinds of voltages |
Nov. 3, 2009 |
| 7605545 |
Control system for multiple fluorescent lamps |
Oct. 20, 2009 |
| 7605809 |
Driver and method for driving a semiconductor light emitting device array |
Oct. 20, 2009 |
| 7593241 |
Hybrid power supply system |
Sep. 22, 2009 |
| 7592757 |
System and method for dimming one or more light source |
Sep. 22, 2009 |
| 7589477 |
Control method and ballast for run-up of metal halide lamp |
Sep. 15, 2009 |
| 7583035 |
System and method for driving LED |
Sep. 1, 2009 |
| 7573207 |
Driver system and method with multi-function protection for cold-cathode fluorescent lamp and external-electrode fluorescent lamp |
Aug. 11, 2009 |
| 7570235 |
Communication diode driver circuit |
Aug. 4, 2009 |
| 7569998 |
Striking and open lamp regulation for CCFL controller |
Aug. 4, 2009 |
| 7567041 |
Discharge lamp lighting apparatus and projector |
Jul. 28, 2009 |
| 7564192 |
HID dimming method and apparatus |
Jul. 21, 2009 |
| 7560879 |
Method and apparatus for DC to AC power conversion for driving discharge lamps |
Jul. 14, 2009 |
| 7557515 |
Simplified ballast control circuit |
Jul. 7, 2009 |
| 7554272 |
Low noise electroluminescent lamp (EL) driver and method therefor |
Jun. 30, 2009 |
| 7554271 |
Single stage PFC and power converter circuit |
Jun. 30, 2009 |
| 7550933 |
Offline control circuit of LED driver to control the maximum voltage and the maximum current of LEDs |
Jun. 23, 2009 |
| 7550934 |
LED driver with fast open circuit protection, short circuit compensation, and rapid brightness control response |
Jun. 23, 2009 |
| 7545102 |
Single-stage electronic ballast device |
Jun. 9, 2009 |
| 7541746 |
Lamp driver circuit with power factor correction circuit coupled to direct-current to direct-current power converter |
Jun. 2, 2009 |
| 7538498 |
Driving circuit of surface light source and method of driving the same |
May. 26, 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 |
| 7531969 |
Arc lamp improvements |
May. 12, 2009 |
| 7528551 |
LED control system |
May. 5, 2009 |
| 7528557 |
Electronic controller for high-power gas discharging lamp |
May. 5, 2009 |
| 7524085 |
Series wiring of highly reliable light sources |
Apr. 28, 2009 |
| 7521912 |
Power supply apparatus |
Apr. 21, 2009 |
| 7521879 |
Device for driving light emitting diode |
Apr. 21, 2009 |
| 7521876 |
Electronic ballast with lamp type determination |
Apr. 21, 2009 |
| 7521877 |
Dimmer circuit for a discharge lighting apparatus |
Apr. 21, 2009 |
| 7521875 |
Electronic light generating element light bulb |
Apr. 21, 2009 |
| 7521874 |
Dimmable ballast control integrated circuit |
Apr. 21, 2009 |
| 7518319 |
LED lighting device and LCD device using the same |
Apr. 14, 2009 |
| 7514879 |
Method and system for driving a plasma-based light source |
Apr. 7, 2009 |
| 7514880 |
Lighting apparatus for projector |
Apr. 7, 2009 |
| 7511437 |
Methods and apparatus for high power factor controlled power delivery using a single switching stage per load |
Mar. 31, 2009 |
| 7511436 |
Current control method and circuit for light emitting diodes |
Mar. 31, 2009 |
| 7511435 |
Backlight unit and liquid crystal display device having the same |
Mar. 31, 2009 |
| 7504782 |
Discharge lamp lighting apparatus and projector |
Mar. 17, 2009 |
| 7498751 |
High efficiency and low cost cold cathode fluorescent lamp driving apparatus for LCD backlight |
Mar. 3, 2009 |
| 7492107 |
Device for driving light source module |
Feb. 17, 2009 |
| 7486033 |
Lighting device |
Feb. 3, 2009 |
| 7486032 |
Apparatus for driving LED arrays |
Feb. 3, 2009 |
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