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Class Information
Number: 315/209R
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit
Description:
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5438239 |
Fluorescent lamp ballast with light output control |
Aug. 1, 1995 |
| 5436533 |
Method to operate a high-pressure discharge lamp suitable for horizontal arc position |
Jul. 25, 1995 |
| 5434476 |
Circuitry for operating fluorescent lamps with no stroboscopic effects |
Jul. 18, 1995 |
| 5434477 |
Circuit for powering a fluorescent lamp having a transistor common to both inverter and the boost converter and method for operating such a circuit |
Jul. 18, 1995 |
| 5434478 |
Electronic ballast for transilluminators and crosslinkers |
Jul. 18, 1995 |
| 5434479 |
Full-bridge inverter for discharge lamp lighting device with varied transistor zero voltage period |
Jul. 18, 1995 |
| 5434480 |
Electronic device for powering a gas discharge road from a low frequency source |
Jul. 18, 1995 |
| 5434481 |
Electronic ballast for fluorescent lamps |
Jul. 18, 1995 |
| 5432409 |
Electronic ballast with parallel-tuned output circuit |
Jul. 11, 1995 |
| 5428266 |
Electronic ballast with leakage transformer |
Jun. 27, 1995 |
| 5426347 |
Lighting system with emergency standby feature |
Jun. 20, 1995 |
| 5426348 |
High efficiency ballast for operation of electronic lamps |
Jun. 20, 1995 |
| 5426350 |
High frequency transformerless electronics ballast using double inductor-capacitor resonant power conversion for gas discharge lamps |
Jun. 20, 1995 |
| 5424611 |
Method for pre-heating a gas-discharge lamp |
Jun. 13, 1995 |
| 5424613 |
Method of operating a gas-discharge lamp and protecting same from overload |
Jun. 13, 1995 |
| 5424614 |
Modified half-bridge parallel-loaded series resonant converter topology for electronic ballast |
Jun. 13, 1995 |
| 5422545 |
Closed loop feedback control circuits for gas discharge lamps |
Jun. 6, 1995 |
| 5418435 |
Light controller with overload current protection circuit |
May. 23, 1995 |
| 5416386 |
Electronic ballast with controlled DC rail voltage |
May. 16, 1995 |
| 5416387 |
Single stage, high power factor, gas discharge lamp ballast |
May. 16, 1995 |
| 5414327 |
High frequency discharge lamp operating circuit with frequency control of the ignition voltage |
May. 9, 1995 |
| 5412287 |
Circuit for powering a gas discharge lamp |
May. 2, 1995 |
| 5410220 |
Control circuit for drive circuit of an electronic ballast for a discharge lamp |
Apr. 25, 1995 |
| 5410221 |
Lamp ballast with frequency modulated lamp frequency |
Apr. 25, 1995 |
| 5406177 |
Gas discharge lamp ballast circuit with compact starting circuit |
Apr. 11, 1995 |
| 5404095 |
Mode power supply including self-inductance in the drive circuit |
Apr. 4, 1995 |
| 5402042 |
Method and apparatus for vacuum fluorescent display power supply |
Mar. 28, 1995 |
| 5402043 |
Controlled driven series-resonant ballast |
Mar. 28, 1995 |
| 5399942 |
Apparatus and method for providing ignition to a turbine engine |
Mar. 21, 1995 |
| 5397965 |
Device for operating a gas discharge lamp |
Mar. 14, 1995 |
| 5396152 |
Electrical circuit for the pulsed operation of high-pressure gas-discharge lamps |
Mar. 7, 1995 |
| 5396153 |
Protection circuit for electronic ballasts which use charge pump power factor correction |
Mar. 7, 1995 |
| 5396154 |
Stabilizer circuit having means for adjusting the light of the lamps |
Mar. 7, 1995 |
| 5394062 |
Lamp ballast circuit with overload detection and ballast operability indication features |
Feb. 28, 1995 |
| 5394064 |
Electronic ballast circuit for fluorescent lamps |
Feb. 28, 1995 |
| 5387845 |
Neon lamp power supply |
Feb. 7, 1995 |
| 5387846 |
Combination ballast for driving a fluorescent lamp or tube and ballast protection circuit |
Feb. 7, 1995 |
| 5387847 |
Passive power factor ballast circuit for the gas discharge lamps |
Feb. 7, 1995 |
| 5387848 |
Fluorescent lamp ballast with regulated feedback signal for improved power factor |
Feb. 7, 1995 |
| 5384516 |
Information processing apparatus including a control circuit for controlling a liquid crystal display illumination based on whether illuminatio power is being supplied from an AC power source |
Jan. 24, 1995 |
| 5384518 |
Power source device |
Jan. 24, 1995 |
| 5382881 |
Ballast stabilization circuitry for eliminating moding or oscillation of the current envelope in gas discharge lamps and method of operating |
Jan. 17, 1995 |
| 5382882 |
Power supply circuit for a gas discharge lamp |
Jan. 17, 1995 |
| 5381076 |
Metal halide electronic ballast |
Jan. 10, 1995 |
| 5381077 |
Power control circuit for high intensity discharge lamps |
Jan. 10, 1995 |
| 5373218 |
Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lamps |
Dec. 13, 1994 |
| 5371439 |
Electronic ballast with lamp power regulation and brownout accommodation |
Dec. 6, 1994 |
| 5371440 |
High frequency miniature electronic ballast with low RFI |
Dec. 6, 1994 |
| 5371441 |
Plug-in electronic lighting product |
Dec. 6, 1994 |
| 5371668 |
Resonant inverter |
Dec. 6, 1994 |
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