Driving circuit and method for light emitting diode
US7999486B2 · kind B2 · utility
3Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2008 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Apr 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit for a light emitting diode (LED) and a method thereof are provided. The driving circuit includes a voltage converting circuit and a reference voltage generator. The reference voltage generator generates a reference voltage according to the cathode voltage of the LED. The voltage converting circuit automatically adjusts the driving voltage of the LED based on the reference voltage so as to reduce the possibility of unnecessary power wastage caused by high driving voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.