Closed-loop feedback circuit for controlling LEDs
US7781983B1 · kind B1 · utility
3Cited by
1References
10Claims
0Family size
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Key dates
| Filing date | Jul 20, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Jan 1, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for controlling LEDs is described. The circuit includes a negative feedback closed-loop circuit provided to sense only the voltage on an LED. Any change in the voltage is caused to be corrected by the negative feedback closed-loop circuit in conjunction with a current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.