Electronic ballast with dimming control from power line sensing
US8067904B2 · kind B2 · utility
1Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2009 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | Jun 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/3925
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a control voltage generator, used to generate a control voltage according to a switching count of a power line; an oscillator, used to generate an oscillating signal, wherein the oscillating signal is of a fixed frequency and has a rising voltage portion and a falling voltage portion; and a comparator, used to generate a high side gating signal according to voltage comparison of the oscillating signal and the control voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.