LED device, LED driving circuit and method
US8994277B2 · kind B2 · utility
3Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2011 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Nov 1, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.