Compact and efficient driver for multiple light emitting diodes (LEDs)
US8373358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Feb 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method includes receiving a variable reference voltage at a power converter and generating a regulated output voltage based on the variable reference voltage. The method also includes sequentially driving multiple sets of light emitting diodes (LEDs) using the regulated output voltage, where each set includes at least one LED. The variable reference voltage varies based on the set of LEDs being driven. For example, the method could include receiving a first reference voltage, generating a first output voltage based on the first reference voltage, and driving a first set of LEDs using the first output voltage. The method could then include receiving a second reference voltage, generating a second output voltage based on the second reference voltage, and driving a second set of LEDs using the second output voltage. At least one additional set of LEDs could be driven concurrently with the sequential driving of the multiple sets of LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.