Ballast with lamp sensor and method therefor
US6781326B2 · kind B2 · utility
13Cited by
10References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2001 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2855
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ballast circuit is provided having an input, an output for coupling to an electric discharge lamp and an oscillation circuit for illuminating the lamp. A circuit may be included for sensing when a voltage on an input to the oscillation circuit exceeds desired levels. The ballast circuit may be shut down, limited or otherwise controlled to reduce the possibility of ballast failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.