Driving circuit and related driving method for providing feedback control and open-circuit protection
US7675246B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2007 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Mar 21, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit includes at least one light-emitting device, a voltage regulator circuit, an analysis and decision circuit, and a selecting circuit. The voltage regulator circuit is coupled to the light-emitting device for providing a driving voltage to drive the light-emitting device. The analysis and decision circuit is coupled to the light-emitting device for determining whether the light-emitting device is open-circuited to generate a decision result. The selecting circuit is coupled between the analysis and decision circuit and the voltage regulator circuit for selecting a maximum forward bias voltage corresponding to the light-emitting device to generate a feedback signal according to the decision result and for transmitting the feedback signal to the voltage regulator circuit. The voltage regulator circuit adjusts the driving voltage according to the feedback signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.