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Class Information
Number: 315/291
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation
Description: Systems which include means to regulate the current and/or voltage supplied to the load device.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7173584 |
Transistor circuit, display panel and electronic apparatus |
Feb. 6, 2007 |
| 7173384 |
Illumination device and control method |
Feb. 6, 2007 |
| 7173383 |
Lighting apparatus having a plurality of independently controlled sources of different colors of light |
Feb. 6, 2007 |
| 7173380 |
Push-pull driver with null-short feature |
Feb. 6, 2007 |
| 7173375 |
Vehicular lamp |
Feb. 6, 2007 |
| 7170237 |
Device for operation of a high pressure discharge lamp |
Jan. 30, 2007 |
| 7170234 |
Light emitting apparatus generating white light by mixing of light of a plurality of oscillation wavelengths |
Jan. 30, 2007 |
| 7170231 |
Lamp that sets desired RMS load voltage with variable pulse width modulation |
Jan. 30, 2007 |
| 7166970 |
Lighting control device having improved long fade off |
Jan. 23, 2007 |
| 7166964 |
Lamp containing pulse width modulated voltage conversion circuit |
Jan. 23, 2007 |
| 7164241 |
Method and apparatus for driving a gas discharge lamp |
Jan. 16, 2007 |
| 7164239 |
Discharge lamp ballast circuit |
Jan. 16, 2007 |
| 7164238 |
Energy savings device and method for a resistive and/or an inductive load and/or a capacitive load |
Jan. 16, 2007 |
| 7164237 |
Circuit arrangement for operating discharge lamps |
Jan. 16, 2007 |
| 7161312 |
Distributed fluorescent light control system |
Jan. 9, 2007 |
| 7161310 |
Backlight apparatus for liquid crystal display |
Jan. 9, 2007 |
| 7161309 |
Protecting a cold cathode fluorescent lamp from a large transient current when voltage supply transitions from a low to a high voltage |
Jan. 9, 2007 |
| 7161308 |
High-voltage discharge lamp operating device |
Jan. 9, 2007 |
| 7161307 |
Power factor correction apparatus with embedded DC--DC converter |
Jan. 9, 2007 |
| 7157865 |
Circuit for driving cold cathode tubes and external electrode fluorescent lamps |
Jan. 2, 2007 |
| 7157864 |
Vehicular lamp, cold cathode fluorescent lamp lighting apparatus, and cold cathode fluorescent lamp lighting method |
Jan. 2, 2007 |
| 7156525 |
System and method for managing projector bulb life |
Jan. 2, 2007 |
| 7154921 |
Light emitting element driving circuit, communication device and light emitting element driving method |
Dec. 26, 2006 |
| 7154644 |
Image reader |
Dec. 26, 2006 |
| 7154234 |
Low voltage regulator for in-line powered low voltage power supply |
Dec. 26, 2006 |
| 7154232 |
Ballast control IC with multi-function feedback sense |
Dec. 26, 2006 |
| 7154231 |
Gas discharge lamp dimming control method |
Dec. 26, 2006 |
| 7154229 |
Electronic ballast with load shed circuit |
Dec. 26, 2006 |
| 7154228 |
Ballast for high pressure discharge lamp |
Dec. 26, 2006 |
| 7154227 |
Circuit arrangement for operating at least one light source |
Dec. 26, 2006 |
| 7151346 |
Method and apparatus for optimizing power efficiency in light emitting device arrays |
Dec. 19, 2006 |
| 7145295 |
Dimming control circuit for light-emitting diodes |
Dec. 5, 2006 |
| 7145294 |
Detecting apparatus for cold cathode lamp |
Dec. 5, 2006 |
| 7145293 |
Electronic ballast having resonance excitation for generating a transfer voltage |
Dec. 5, 2006 |
| 7144130 |
Illumination device |
Dec. 5, 2006 |
| 7141940 |
Method and control circuitry for providing average current mode control in a power converter and an active power filter |
Nov. 28, 2006 |
| 7141939 |
Power supply circuit that is stable against sudden load change |
Nov. 28, 2006 |
| 7141938 |
Power control device, apparatus and method of controlling the power supplied to a discharge lamp |
Nov. 28, 2006 |
| 7141937 |
High-pressure discharge lamp operation device and illumination appliance having the same |
Nov. 28, 2006 |
| 7141933 |
Systems and methods for a transformer configuration for driving multiple gas discharge tubes in parallel |
Nov. 28, 2006 |
| 7139500 |
Image fusing device and image forming apparatus |
Nov. 21, 2006 |
| 7138770 |
LED driving circuit |
Nov. 21, 2006 |
| 7138769 |
Device for operation of a high pressure discharge lamp and a projector device |
Nov. 21, 2006 |
| 7135825 |
LED power supply device |
Nov. 14, 2006 |
| 7132803 |
High efficiency 4-lamp instant start ballast |
Nov. 7, 2006 |
| 7129653 |
Self-contained, self-snubbed, HID dimming module that exhibits non-zero crossing detection switching |
Oct. 31, 2006 |
| 7129652 |
System and method for driving a plurality of loads |
Oct. 31, 2006 |
| 7129651 |
Remote control of electronic light ballast and other devices |
Oct. 31, 2006 |
| 7129650 |
Lighting apparatus for high intensity discharge lamp |
Oct. 31, 2006 |
| 7129647 |
Electronic ballast with programmable processor |
Oct. 31, 2006 |
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