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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 |
| 6034489 |
Electronic ballast circuit |
Mar. 7, 2000 |
| 6034490 |
Lighting circuit for discharge lamp |
Mar. 7, 2000 |
| 6031338 |
Ballast method and apparatus and coupling therefor |
Feb. 29, 2000 |
| 6031339 |
Efficient electronic ballast for fluorescent tubes |
Feb. 29, 2000 |
| 6031342 |
Universal input warm-start linear ballast |
Feb. 29, 2000 |
| 6028397 |
Buck converter switching scheme |
Feb. 22, 2000 |
| 6023132 |
Electronic ballast deriving auxilliary power from lamp output |
Feb. 8, 2000 |
| 6020688 |
Converter/inverter full bridge ballast circuit |
Feb. 1, 2000 |
| 6020691 |
Driving circuit for high intensity discharge lamp electronic ballast |
Feb. 1, 2000 |
| 6018220 |
Gas discharge lamp ballast circuit with a non-electrolytic smoothing capacitor for rectified current |
Jan. 25, 2000 |
| 6018221 |
Lighting circuit and lighting device |
Jan. 25, 2000 |
| 6011360 |
High efficiency dimmable cold cathode fluorescent lamp ballast |
Jan. 4, 2000 |
| 6011361 |
Buck converter switching scheme |
Jan. 4, 2000 |
| 6008589 |
Single-switch, high power factor, ac-to-ac power converters |
Dec. 28, 1999 |
| 6008590 |
Integrated circuit inverter control having a multi-function pin |
Dec. 28, 1999 |
| 6008591 |
Circuit for starting an hid lamp |
Dec. 28, 1999 |
| 6005352 |
Electronic flash device |
Dec. 21, 1999 |
| 6005353 |
Commutator for a discharge lamp having mutually coupled inductors |
Dec. 21, 1999 |
| 6005354 |
Ballast IC with shut-down function |
Dec. 21, 1999 |
| 6002210 |
Electronic ballast with controlled-magnitude output voltage |
Dec. 14, 1999 |
| 6002215 |
Lighting circuit for discharge lamp |
Dec. 14, 1999 |
| 5998930 |
Electronic ballast with two-step boost converter and method |
Dec. 7, 1999 |
| 5998936 |
Fire-initiation-safe lighting system |
Dec. 7, 1999 |
| 5998939 |
High frequency HID lamp system |
Dec. 7, 1999 |
| 5998941 |
Low-voltage high-efficiency fluorescent signage, particularly exit sign |
Dec. 7, 1999 |
| 5994846 |
Buck converter switching scheme |
Nov. 30, 1999 |
| 5994847 |
Electronic ballast with lamp current valley-fill power factor correction |
Nov. 30, 1999 |
| 5986408 |
Discharge lamp with heating electrode circuit |
Nov. 16, 1999 |
| 5986410 |
Integrated circuit for use in a ballast circuit for a gas discharge lamp |
Nov. 16, 1999 |
| 5982104 |
Driver for capacitive light-emitting device with degradation compensated brightness control |
Nov. 9, 1999 |
| 5982106 |
Self-protected series resonant electronic energy converter |
Nov. 9, 1999 |
| 5982107 |
Drive circuit for a power-saving lamp |
Nov. 9, 1999 |
| 5982108 |
DC/AC converter for a discharge lamp having a DC offset at the switching element to reduce power loss |
Nov. 9, 1999 |
| 5982109 |
Electronic ballast with fault-protected series resonant output circuit |
Nov. 9, 1999 |
| 5977720 |
Method and apparatus for driving an electroluminescent lamp |
Nov. 2, 1999 |
| 5977723 |
Ballast circuit for fluorescent lamp |
Nov. 2, 1999 |
| 5977725 |
Resonance type power converter unit, lighting apparatus for illumination using the same and method for control of the converter unit and lighting apparatus |
Nov. 2, 1999 |
| 5969481 |
Power supply and electronic ballast with high efficiency voltage converter |
Oct. 19, 1999 |
| 5965985 |
Dimmable ballast with complementary converter switches |
Oct. 12, 1999 |
| 5962981 |
Discharge lamp lighting device |
Oct. 5, 1999 |
| 5959410 |
Charge pump power factor correction circuit for power supply for gas discharge lamp |
Sep. 28, 1999 |
| 5959412 |
Inverter circuit for discharge tube having impedance matching circuit |
Sep. 28, 1999 |
| 5952790 |
Lamp ballast circuit with simplified starting circuit |
Sep. 14, 1999 |
| 5949196 |
Method and system for switchable light levels in operating gas discharge lamps with an inexpensive single ballast |
Sep. 7, 1999 |
| 5945786 |
Discharge lamp igniter with reduced noise output |
Aug. 31, 1999 |
| 5942859 |
Discharge lamp lighting device |
Aug. 24, 1999 |
| 5939830 |
Method and apparatus for dimming a lamp in a backlight of a liquid crystal display |
Aug. 17, 1999 |
| 5939832 |
Safety disconnection with asymmetric lamp power |
Aug. 17, 1999 |
| 5939834 |
Power supply circuit with complementary converter switches |
Aug. 17, 1999 |
| 5939835 |
Discharge lamp lighting device with power system, control system and power source system |
Aug. 17, 1999 |
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