Power source sensing dimming circuits and methods of operating same
US8217591B2 · kind B2 · utility
36Cited by
40References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 2009 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Jun 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Lighting is controlled by receiving an input signal, determining whether the input signal is an AC signal or a DC signal and generating a dimming command signal based on the determination of whether the input signal is an AC signal or a DC signal. For example, determining whether the input signal is an AC signal or a DC signal may include generating an average signal indicative of an average duty cycle of the input signal and determining whether the average signal meets a predetermined criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.