Method and apparatus for LED driving and dimming, and illumination system
US9119238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2011 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Aug 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for driving an LED connected to a power switch is provided. The method includes: determining a duty cycle of a pulse sequence for controlling the power switch according to a present current and a predetermined operating current of the LED; generating the pulse sequence according to the duty cycle and according to at least one of a randomized period sequence and a randomized pulse position sequence; and controlling switching operation of the power switch by the pulse sequence, so as to drive the LED. An apparatus for driving a light emitting diode, an apparatus for dimming a light emitting diode and illumination systems are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.