Wide range dimmable fluorescent lamp ballast system
US5172034A · kind A · utility
24Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Jun 10, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention and its related methods of operation provide a wide range dimmable high frequency lamp ballast system having a resonant circuit associated with each lamp or lamp set for providing a resonant frequency which is substantially higher than the drive frequency at which the lamp or lamp set is driven, and means for automatically selecting a drive frequency to be a submultiple of the resonant frequency of the resonant circuit, the selection of a submultiple being dependent on lamp operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.