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Class Information
Number: 315/224
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Impedance or current regulator in the supply circuit
Description: Systems having an impedance or a current or voltage regulator connected in the supply circuit of the load device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619904 |
Pulse signal drive circuit |
Nov. 17, 2009 |
| 7619372 |
Method and apparatus for driving a light emitting diode |
Nov. 17, 2009 |
| 7619371 |
Inverter for driving backlight devices in a large LCD panel |
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 |
| 7615939 |
Spectrally calibratable multi-element RGB LED light source |
Nov. 10, 2009 |
| 7615937 |
High-pressure discharge lamp lighting device and lighting fixture |
Nov. 10, 2009 |
| 7615934 |
High efficiency resonant ballast |
Nov. 10, 2009 |
| 7615933 |
Pulsed dielectric barrier discharge |
Nov. 10, 2009 |
| 7609008 |
Method and circuit for controlling an LED |
Oct. 27, 2009 |
| 7609007 |
Dimmer adaptable to either two or three active wires |
Oct. 27, 2009 |
| 7598859 |
Method and system for controlling lighting |
Oct. 6, 2009 |
| 7598685 |
Off line LED driver with integrated synthesized digital optical feedback |
Oct. 6, 2009 |
| 7598678 |
Lamp lighting apparatus |
Oct. 6, 2009 |
| 7598677 |
Multiple failure detection shutdown protection circuit for an electronic ballast |
Oct. 6, 2009 |
| 7592753 |
Inductively-powered gas discharge lamp circuit |
Sep. 22, 2009 |
| 7589480 |
High intensity discharge lamp ballast |
Sep. 15, 2009 |
| 7589477 |
Control method and ballast for run-up of metal halide lamp |
Sep. 15, 2009 |
| 7589476 |
Power supply for external electrode fluorescent lamps |
Sep. 15, 2009 |
| 7589475 |
Electric lamp with enhanced dependability |
Sep. 15, 2009 |
| 7586270 |
Circuit and method for the operation of miniature high pressure short-arc lamps using alternating current |
Sep. 8, 2009 |
| 7586269 |
Device for driving light source module |
Sep. 8, 2009 |
| 7586268 |
Apparatus and method for controlling the filament voltage in an electronic dimming ballast |
Sep. 8, 2009 |
| 7586267 |
Inverter system and detecting device thereof |
Sep. 8, 2009 |
| 7586266 |
Driver circuit for an HID lamp and method for operating an HID lamp |
Sep. 8, 2009 |
| 7586265 |
Illumination device |
Sep. 8, 2009 |
| 7583035 |
System and method for driving LED |
Sep. 1, 2009 |
| 7579790 |
Multiple gas discharge lamp interleave trigger circuit |
Aug. 25, 2009 |
| 7579783 |
Microprocessor-controlled insertable flashlight adapter device |
Aug. 25, 2009 |
| 7579782 |
Circuitry for portable lighting devices and portable rechargeable electronic devices |
Aug. 25, 2009 |
| 7573729 |
Resonant power LED control circuit with brightness and color control |
Aug. 11, 2009 |
| 7573210 |
Method and system for feedback and control of a luminaire |
Aug. 11, 2009 |
| 7573209 |
Method and system for feedback and control of a luminaire |
Aug. 11, 2009 |
| 7573207 |
Driver system and method with multi-function protection for cold-cathode fluorescent lamp and external-electrode fluorescent lamp |
Aug. 11, 2009 |
| 7573204 |
Standby lighting for lamp ballasts |
Aug. 11, 2009 |
| 7569998 |
Striking and open lamp regulation for CCFL controller |
Aug. 4, 2009 |
| 7567067 |
Power supply, display device, and light source driving apparatus |
Jul. 28, 2009 |
| 7567039 |
Multiple discharge lamp lighting apparatus |
Jul. 28, 2009 |
| 7564201 |
Intelligent gas discharge lamp control circuit |
Jul. 21, 2009 |
| 7564200 |
Discharge lamp lighting circuit with frequency control in accordance with phase difference |
Jul. 21, 2009 |
| 7564197 |
Discharge tube operation device |
Jul. 21, 2009 |
| 7564194 |
Method for detecting lamp current and lamp driving circuit using the method for detecting the lamp current |
Jul. 21, 2009 |
| 7564193 |
DC-AC converter having phase-modulated, double-ended, full-bridge topology for powering high voltage load such as cold cathode fluorescent lamp |
Jul. 21, 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 |
| 7560878 |
Circuit arrangement and method for operating high-pressure discharge lamps |
Jul. 14, 2009 |
| 7560877 |
Operation circuit for a discharge lamp and device for operation of a discharge lamp and a light source device |
Jul. 14, 2009 |
| 7560874 |
Electronic ballast with improved inverter startup circuit |
Jul. 14, 2009 |
| 7560873 |
Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast |
Jul. 14, 2009 |
| 7560872 |
DC-AC converter having phase-modulated, double-ended, half-bridge topology for powering high voltage load such as cold cathode fluorescent lamp |
Jul. 14, 2009 |
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