LED circuit and operation method of the same having minimum output voltage selection mechanism to generate feedback voltage
US8368316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2010 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Mar 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A LED circuit is provided. The LED circuit comprises: a plurality of LED channels, a driving module and a feedback-selecting module. The driving module supplies a driving voltage to the plurality of LED channels according to a feedback voltage. The feedback-selecting module comprises an open detection unit and a minimum-selecting unit. The open detection unit performs an open detection mechanism to separate the plurality of LED channels into a plurality of open LED channels and a plurality of non-open LED channels having an output voltage respectively. The minimum-selecting unit performs a selection mechanism to select a minimum output voltage as the feedback voltage from the output voltage of each of the plurality of non-open LED channels. A LED circuit operation method adapted in the LED circuit is provided herein as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.