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Class Information
Number: 315/307
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Automatic regulation
Description: Systems wherein the regulation of the current or potential supplied to the load device is automatically controlled in response to some condition.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6710555 |
Discharge lamp lighting circuit with protection circuit |
Mar. 23, 2004 |
| 6710556 |
Discharge lamp lighting apparatus |
Mar. 23, 2004 |
| 6707257 |
Ferrite stabilized LED drive |
Mar. 16, 2004 |
| 6707262 |
Discharge lamp operating circuit having a circuit for detecting the proximity to capacitive operation |
Mar. 16, 2004 |
| 6707264 |
Sequential burst mode activation circuit |
Mar. 16, 2004 |
| 6703794 |
Power factor correction device including electronic ballast function |
Mar. 9, 2004 |
| 6703796 |
Power supply and inverter used therefor |
Mar. 9, 2004 |
| 6703798 |
Discharge lamp lighting device |
Mar. 9, 2004 |
| 6700335 |
Method and circuit for regulating power in a high pressure discharge lamp |
Mar. 2, 2004 |
| 6696797 |
Electronic ballast having valley frequency modulation for a gas discharge lamp |
Feb. 24, 2004 |
| 6696798 |
Ballast circuit for operating a discharge lamp |
Feb. 24, 2004 |
| 6696803 |
Self-oscillating electronic discharge lamp ballast with dimming control |
Feb. 24, 2004 |
| 6693394 |
Brightness compensation for LED lighting based on ambient temperature |
Feb. 17, 2004 |
| 6693395 |
Remote control of electronic light ballast and other devices |
Feb. 17, 2004 |
| 6693396 |
Apparatus for driving a discharge lamp |
Feb. 17, 2004 |
| 6693397 |
Light source device |
Feb. 17, 2004 |
| 6693527 |
Warning system |
Feb. 17, 2004 |
| 6690121 |
High precision luminance control for PWM-driven lamp |
Feb. 10, 2004 |
| 6690122 |
Lamp ballast with SEPIC converter |
Feb. 10, 2004 |
| 6686702 |
Transformerless xenon power supply |
Feb. 3, 2004 |
| 6683418 |
Inverter type illumination lighting apparatus |
Jan. 27, 2004 |
| 6683420 |
Switching device for operating a high-pressure discharge lamp |
Jan. 27, 2004 |
| 6683422 |
Full wave sense amplifier and discharge lamp inverter incorporating the same |
Jan. 27, 2004 |
| 6680582 |
System and method for employing pulse width modulation for reducing vertical segregation in a gas discharge lamp |
Jan. 20, 2004 |
| 6680584 |
Device for driving discharge lamp |
Jan. 20, 2004 |
| 6680588 |
Low noise backlight system for use in display device and method for driving the same |
Jan. 20, 2004 |
| 6677716 |
Operating device for gas discharge lamp |
Jan. 13, 2004 |
| 6677718 |
HID electronic ballast with glow to arc and warm-up control |
Jan. 13, 2004 |
| 6677719 |
Ballast circuit |
Jan. 13, 2004 |
| 6670769 |
Image input device |
Dec. 30, 2003 |
| 6670780 |
Method for operating high-pressure discharge lamp, lighting apparatus, and high-pressure discharge lamp apparatus |
Dec. 30, 2003 |
| 6670781 |
Cold cathode fluorescent lamp low dimming antiflicker control circuit |
Dec. 30, 2003 |
| 6667583 |
Method and apparatus for efficiently driving a low-voltage device from a wide-range input supply |
Dec. 23, 2003 |
| 6667585 |
Fluorescent lamp brightness control process by ballast frequency adjustment |
Dec. 23, 2003 |
| 6667586 |
Variable frequency electronic ballast for gas discharge lamp |
Dec. 23, 2003 |
| 6667587 |
Flickering mode control system for a high intensity discharge lamp |
Dec. 23, 2003 |
| 6664735 |
Dimmer for incandesent lamp |
Dec. 16, 2003 |
| 6661182 |
Lamp ballast system having improved power factor and end-of-lamp-life protection circuit |
Dec. 9, 2003 |
| 6657401 |
Ballast for discharge lamp |
Dec. 2, 2003 |
| 6657403 |
Circuit arrangement for operating a fluorescent lamp |
Dec. 2, 2003 |
| 6653800 |
Ballast circuit with lamp cathode protection and ballast protection |
Nov. 25, 2003 |
| 6650067 |
Electronic ballast for discharge lamps |
Nov. 18, 2003 |
| 6650070 |
Point of use lighting controller |
Nov. 18, 2003 |
| 6646392 |
Circuit arrangement for operating a discharge lamp |
Nov. 11, 2003 |
| 6642668 |
Discharge lamp device for reducing noise radiation and surge pulse current |
Nov. 4, 2003 |
| 6642674 |
Twin dimming controller for backlight system |
Nov. 4, 2003 |
| 6639367 |
Control circuit employing preconditioned feedback amplifier for initializing VCO operating frequency |
Oct. 28, 2003 |
| 6639369 |
Electronic dimmable ballast for high intensity discharge lamp |
Oct. 28, 2003 |
| 6635991 |
Method of adjusting the light spectrum of a gas discharge lamp, gas discharge lamp, and luminaire for said lamp |
Oct. 21, 2003 |
| 6630801 |
Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes |
Oct. 7, 2003 |
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