Fluorescent dimming ballast with improved efficiency
US8581501B2 · kind B2 · utility
2Cited by
25References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2009 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Sep 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Dimming ballasts and methods are presented for powering a plurality of fluorescent lamps in which at most one of the lamps is selectively dimmed while all the remaining lamps are turned on or off according to a dimming level setpoint to allow dimming to match a user's desired lighting level while maintaining high efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.