Lighting system electronic ballast or driver with shunt control for lighting control quiescent current
US8653759B2 · kind B2 · utility
13Cited by
1References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2010 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Jul 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/3575
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Ballasts and LED drivers are presented for powering at least one light source, in which a shunt circuit provides a high impedance to allow operation of the light source when the AC input power exceeds a power threshold value, and provides a low impedance when the AC input power is below the power threshold value to prevent an output power stage from providing power to the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.