Electronic ballast having a pump circuit for a discharge lamp having preheatable electrodes
US7193375B2 · kind B2 · utility
2Cited by
12References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2005 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Aug 30, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electronic ballast for discharge lamps LA1, LA2 having preheatable electrodes which has a pump circuit D5/D7, D6/D8 for improving the power factor. In this arrangement, preheating is performed with a converter frequency, raised by comparison with continuous operation, and with the aid of a preheating transformer TR2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.