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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 |
| 6909238 |
Back-lighted control and protection device for multi-lamp LCD |
Jun. 21, 2005 |
| 6909245 |
Ballast circuit for control of lamp power |
Jun. 21, 2005 |
| 6909246 |
Electronic ballast and electronic transformer |
Jun. 21, 2005 |
| 6909248 |
Deuterium arc lamp assembly with an elapsed time indicator system and a method thereof |
Jun. 21, 2005 |
| 6909249 |
Switching constant-current power supply |
Jun. 21, 2005 |
| 6909250 |
Apparatus and method for operating a portable xenon arc searchlight |
Jun. 21, 2005 |
| 6909377 |
Illumination device with light emitting diodes (LEDs), method of illumination and method for image recording with such an LED illumination device |
Jun. 21, 2005 |
| 6906475 |
Fluorescent lamp and high intensity discharge lamp with improved luminous efficiency |
Jun. 14, 2005 |
| 6903518 |
Discharge lamp device and backlight using the same |
Jun. 7, 2005 |
| 6900593 |
Light source and image reading device using the same |
May. 31, 2005 |
| 6900599 |
Electronic dimming ballast for cold cathode fluorescent lamp |
May. 31, 2005 |
| 6900600 |
Method for starting a discharge lamp using high energy initial pulse |
May. 31, 2005 |
| 6900601 |
Control circuit of two current unidirectional switches |
May. 31, 2005 |
| 6897622 |
Incremental color blending illumination system using LEDs |
May. 24, 2005 |
| 6897623 |
Electric power supply system for LED lighting unit |
May. 24, 2005 |
| 6894437 |
Light source device |
May. 17, 2005 |
| 6894438 |
Lighting system and method incorporating pulsed mode drive for enhanced afterglow |
May. 17, 2005 |
| 6894440 |
Method and device for lighting an electronic or electromechanical apparatus |
May. 17, 2005 |
| 6894441 |
Method and apparatus for detecting remaining lamp lifetime |
May. 17, 2005 |
| 6894442 |
Luminary control system |
May. 17, 2005 |
| 6891337 |
Lighting system |
May. 10, 2005 |
| 6891338 |
Projector, lamp lighting circuit and lamp lighting control method |
May. 10, 2005 |
| 6891339 |
Adaptive CFL control circuit |
May. 10, 2005 |
| 6892310 |
Method for efficient supply of power to a microcontroller |
May. 10, 2005 |
| 6888319 |
Flashlamp drive circuit |
May. 3, 2005 |
| 6888321 |
Device for operating a high pressure discharge lamp |
May. 3, 2005 |
| 6888323 |
Light management system device and method |
May. 3, 2005 |
| 6888922 |
Filament circuit resistance adjusting apparatus technical field |
May. 3, 2005 |
| 6885159 |
Light emitting device drive and image forming apparatus |
Apr. 26, 2005 |
| 6882117 |
Apparatus and methods for continuous and/or selective production of multiple light displays |
Apr. 19, 2005 |
| 6882118 |
Discharge lamp starting device and illumination apparatus |
Apr. 19, 2005 |
| 6882119 |
Lamp with multiple light-producing elements |
Apr. 19, 2005 |
| 6879111 |
DC/AC and DC/DC power supply for LCD displays |
Apr. 12, 2005 |
| 6879113 |
Low frequency output electronic ballast |
Apr. 12, 2005 |
| 6879115 |
Adaptive ballast control IC |
Apr. 12, 2005 |
| 6876157 |
Lamp inverter with pre-regulator |
Apr. 5, 2005 |
| 6876158 |
Electronic ballast with full bridge circuit |
Apr. 5, 2005 |
| 6876159 |
Electronic ballast system for emergency lighting applications |
Apr. 5, 2005 |
| 6873111 |
Vehicular lamp |
Mar. 29, 2005 |
| 6873121 |
Fluorescent ballast with unique dimming control |
Mar. 29, 2005 |
| 6873262 |
Maintaining illumination intensity of a light emitting diode in a domestic appliance |
Mar. 29, 2005 |
| 6870319 |
Optical axis adjusting system for vehicle head lamp |
Mar. 22, 2005 |
| 6870325 |
Led drive circuit and method |
Mar. 22, 2005 |
| 6870326 |
Fluorescent ballast with isolated system interface |
Mar. 22, 2005 |
| 6870327 |
Electrode-less discharge lamp lighting apparatus, bulb-shaped electrode-less fluorescent lamp, and discharge lamp lighting apparatus |
Mar. 22, 2005 |
| 6870328 |
LED lamp apparatus for vehicles |
Mar. 22, 2005 |
| 6870329 |
PWM controller with automatic low battery power reduction circuit and lighting device incorporating the controller |
Mar. 22, 2005 |
| 6870330 |
Shorted lamp detection in backlight system |
Mar. 22, 2005 |
| 6866390 |
Image modification effects for image projection lighting devices |
Mar. 15, 2005 |
| 6867554 |
Ballast control card |
Mar. 15, 2005 |
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