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Class Information
Number: 315/246
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply
Description: Systems wherein the load devices in the system is supplied with either pulsating or alternating current or potential (but not both).
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7609007 |
Dimmer adaptable to either two or three active wires |
Oct. 27, 2009 |
| 7586272 |
Cold cathode fluorescent lamp, cold cathode fluorescent lamp driving apparatus, cold cathode fluorescent lamp apparatus, liquid crystal display apparatus, control method for cold cathode fluor |
Sep. 8, 2009 |
| 7579788 |
Power supply system of a light source and a light source actuating method |
Aug. 25, 2009 |
| 7557515 |
Simplified ballast control circuit |
Jul. 7, 2009 |
| 7554272 |
Low noise electroluminescent lamp (EL) driver and method therefor |
Jun. 30, 2009 |
| 7554254 |
Flat fluorescent lamp |
Jun. 30, 2009 |
| 7554271 |
Single stage PFC and power converter circuit |
Jun. 30, 2009 |
| 7545102 |
Single-stage electronic ballast device |
Jun. 9, 2009 |
| 7528551 |
LED control system |
May. 5, 2009 |
| 7521875 |
Electronic light generating element light bulb |
Apr. 21, 2009 |
| 7514880 |
Lighting apparatus for projector |
Apr. 7, 2009 |
| 7501773 |
Multistrike gas discharge lamp ignition apparatus and method |
Mar. 10, 2009 |
| 7495398 |
Discharge lamp lighting apparatus |
Feb. 24, 2009 |
| 7486032 |
Apparatus for driving LED arrays |
Feb. 3, 2009 |
| 7477022 |
System and method for driving a multi-lamp |
Jan. 13, 2009 |
| 7463070 |
Switching device for driving LED array by pulse-shaped current modulation |
Dec. 9, 2008 |
| 7459861 |
Lamp containing voltage conversion circuit including forward/reverse hybrid phase-control clipping circuit |
Dec. 2, 2008 |
| 7456586 |
Voltage controlled light source and image presentation device using the same |
Nov. 25, 2008 |
| 7449841 |
Charge limited high voltage switch circuits |
Nov. 11, 2008 |
| 7446483 |
Backlight light source drive device |
Nov. 4, 2008 |
| 7436130 |
Cold-cathode tube lighting device for use in a plurality of cold-cathode tubes lit by two low-impedance power sources |
Oct. 14, 2008 |
| 7432663 |
Circuit for igniting a high intensity discharge lamp |
Oct. 7, 2008 |
| 7425804 |
Lamp drive device of projector |
Sep. 16, 2008 |
| 7423385 |
System and method for controlling voltage on discharge capacitors which control light energy from flash lamps |
Sep. 9, 2008 |
| 7408309 |
Input current limiting circuit and driving device using the same |
Aug. 5, 2008 |
| 7408329 |
Power supply unit for gas discharge processes |
Aug. 5, 2008 |
| 7402956 |
Ballast with zero voltage switching converter |
Jul. 22, 2008 |
| 7391164 |
Visual notification methods for candy-bar type cellphones |
Jun. 24, 2008 |
| 7378804 |
Ballast for a discharge lamp with integrated control circuit for controlling switching element of dc power supply and inverter circuit |
May. 27, 2008 |
| 7378803 |
Igniting pulse booster circuit |
May. 27, 2008 |
| 7372211 |
Cold cathode tube lighting device and driving method and integrated circuit to be used in same |
May. 13, 2008 |
| 7372216 |
Constant brightness control for electro-luminescent lamp |
May. 13, 2008 |
| 7362058 |
Method and device for controlling the light intensity in a multi-lamp illumination device for a display panel |
Apr. 22, 2008 |
| 7358680 |
Bistate HID operation |
Apr. 15, 2008 |
| 7358689 |
Phase-control power controller for converting a line voltage to a RMS load voltage |
Apr. 15, 2008 |
| 7358683 |
Automatic PWM controlled driver circuit and method |
Apr. 15, 2008 |
| 7355353 |
Illumination control circuit |
Apr. 8, 2008 |
| 7345432 |
Inverter circuit for lighting backlight of liquid crystal display and method for driving the same |
Mar. 18, 2008 |
| 7339330 |
Methods and circuits for instant hot restart of high intensity discharge lamps |
Mar. 4, 2008 |
| 7339328 |
Method of shaping light pulses emitted by an arc lamp |
Mar. 4, 2008 |
| 7334917 |
Illumination device |
Feb. 26, 2008 |
| 7332873 |
Electrical circuit for fluorescent lamps |
Feb. 19, 2008 |
| 7332870 |
Driving voltage controller for light-emitting source |
Feb. 19, 2008 |
| 7330002 |
Circuit for controlling LED with temperature compensation |
Feb. 12, 2008 |
| 7321203 |
LED dimming control technique for increasing the maximum PWM dimming ratio and avoiding LED flicker |
Jan. 22, 2008 |
| 7315137 |
Method and apparatus for a CCFL driving device |
Jan. 1, 2008 |
| 7315135 |
Load driving device and load driving method |
Jan. 1, 2008 |
| 7304438 |
Method and apparatus for preventing instabilities in radio-frequency plasma processing |
Dec. 4, 2007 |
| 7294971 |
Balancing transformers for ring balancer |
Nov. 13, 2007 |
| 7291984 |
Method of reducing RMS load voltage in a lamp using pulse width modulation |
Nov. 6, 2007 |
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