Ballast with end-of-life protection for one or more lamps
US8362701B2 · kind B2 · utility
2Cited by
22References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2009 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Apr 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/2988
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Ballasts are presented with improved end-of-life (EOL) detection of lamp DC voltage components and protection circuits to facilitate user maintenance and extend lamp life using selective dimming with preheating when EOL conditions are detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.