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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 |
| 6181066 |
Frequency modulated ballast with loosely coupled transformer for parallel gas discharge lamp control |
Jan. 30, 2001 |
| 6181082 |
Ballast power control circuit |
Jan. 30, 2001 |
| 6175191 |
Drive circuit for EL element |
Jan. 16, 2001 |
| 6172890 |
Half bridge circuit drive without collector bias current peak |
Jan. 9, 2001 |
| 6166494 |
Drive circuit arrangement for a gas discharge lamp |
Dec. 26, 2000 |
| 6160357 |
Bridge commutator with separate drive oscillator for electrodeless lamps |
Dec. 12, 2000 |
| 6160358 |
Ballast circuit with lamp current regulating circuit |
Dec. 12, 2000 |
| 6160362 |
Ignition scheme for a high intensity discharge lamp |
Dec. 12, 2000 |
| 6150768 |
Ballast with active power factor correction |
Nov. 21, 2000 |
| 6150769 |
Gas discharge lamp ballast with tapless feedback circuit |
Nov. 21, 2000 |
| 6150773 |
Model and method for high-frequency electronic ballast design |
Nov. 21, 2000 |
| 6147457 |
Incandescent lamp with continuous high-frequency oscillations |
Nov. 14, 2000 |
| 6147463 |
Electronic ballast for the operation of at least one gas discharge lamp |
Nov. 14, 2000 |
| 6144167 |
Circuit arrangement |
Nov. 7, 2000 |
| 6144168 |
Circuit arrangement for operation of a high-pressure gas discharge lamp on alternating current |
Nov. 7, 2000 |
| 6144171 |
Ignitor for high intensity discharge lamps |
Nov. 7, 2000 |
| 6144172 |
Method and driving circuit for HID lamp electronic ballast |
Nov. 7, 2000 |
| 6144175 |
Low-voltage ballast-free energy-efficient ultraviolet material treatment and purification system and method |
Nov. 7, 2000 |
| 6144445 |
Electronic ballast products and systems |
Nov. 7, 2000 |
| 6140779 |
Incrementally preheating and lighting system for a discharge lamp |
Oct. 31, 2000 |
| 6137233 |
Ballast circuit with independent lamp control |
Oct. 24, 2000 |
| 6137234 |
Circuit arrangement |
Oct. 24, 2000 |
| 6137238 |
High-efficiency self-regulated electronic ballast with a single characteristic curve for operating high-pressure sodium vapor lamps |
Oct. 24, 2000 |
| 6137241 |
Starting switch circuit for a fluorescent lamp |
Oct. 24, 2000 |
| 6133696 |
Dimmer for fluorescent lighting |
Oct. 17, 2000 |
| 6134132 |
Circuit arrangement |
Oct. 17, 2000 |
| 6130508 |
Method and apparatus for operating a discharge lamp to reduce the curvature of its discharge arc |
Oct. 10, 2000 |
| 6127786 |
Ballast having a lamp end of life circuit |
Oct. 3, 2000 |
| 6127788 |
High voltage discharge lamp device |
Oct. 3, 2000 |
| 6124678 |
Fluorescent lamp excitation circuit having a multi-layer piezoelectric acoustic transformer and methods for using the same |
Sep. 26, 2000 |
| 6124680 |
Lighting device for illumination and lamp provided with the same |
Sep. 26, 2000 |
| 6124682 |
Lamp driver circuit using resonant circuit for starting lamp |
Sep. 26, 2000 |
| 6121731 |
Discharge lamp lighting system with overcurrent protection for an inverter switch or switches |
Sep. 19, 2000 |
| 6121732 |
Neon lamp power supply for producing a bubble-free discharge without promoting mercury migration or premature core saturation |
Sep. 19, 2000 |
| 6121734 |
Apparatus for dimming a fluorescent lamp with a magnetic ballast |
Sep. 19, 2000 |
| 6118224 |
Discharge lamp lighting device |
Sep. 12, 2000 |
| 6118225 |
High frequency discharge lamp operating circuit with resonant power factor correction circuit |
Sep. 12, 2000 |
| 6118228 |
Electronic ballast for fluorescent lamps |
Sep. 12, 2000 |
| 6114815 |
Device and process for lighting discharge lamp |
Sep. 5, 2000 |
| 6111362 |
Controlling color shift in EL phosphors |
Aug. 29, 2000 |
| 6111363 |
Ballast shutdown circuit for a gas discharge lamp |
Aug. 29, 2000 |
| 6111365 |
Fast starting, surge limited, electronic ballast |
Aug. 29, 2000 |
| 6111370 |
High-efficiency gas discharge signage lighting |
Aug. 29, 2000 |
| 6107744 |
Back-up electrical systems |
Aug. 22, 2000 |
| 6107747 |
Self ballasted fluorescent lamp and lighting fixture |
Aug. 22, 2000 |
| 6107750 |
Converter/inverter circuit having a single switching element |
Aug. 22, 2000 |
| 6107751 |
Current fed, parallel resonant ballast |
Aug. 22, 2000 |
| 6107753 |
Radio frequency electronic ballast with integrated power factor correction stage |
Aug. 22, 2000 |
| 6107754 |
Electronic ballast for high-intensity discharge lamp and method of driving high-intensity discharge lamp |
Aug. 22, 2000 |
| 6104142 |
Circuit arrangement for operating low-pressure discharge lamps |
Aug. 15, 2000 |
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