Circuits and methods for controlling power of light sources
US8324832B2 · kind B2 · utility
13Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2010 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Oct 1, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit for driving a light source includes a power converter, a controller and a voltage-controlled current source. The power converter is coupled to the light source, and receives an input voltage from a power source and provides an output voltage to the light source. The power converter includes a switch coupled in series with the light source. The controller is coupled to the power converter and controls a power of the light source by controlling the switch. The voltage-controlled current source is coupled to the controller and provides a first current. The controller controls the switch based on the first current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.