Dimming controlling circuit for LED
US8901836B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 31, 2011 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Aug 31, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimming controlling circuit for LED includes: a switch configured to connect a main circuit and a power grid; a switch-on duration controlling circuit configured to output a switch-on duration controlling signals according to action times of the switch; a switch-off controlling circuit configured to output a switch-off controlling signal according to a comparison result of the voltages of the switch-on duration controlling signal and of a signal from a terminal of a switch transistor in the main circuit; a switch-on controlling circuit configured to generate a switch-on controlling signal after a first preset duration since receiving the switch-off controlling signal; and a logic unit configured to output a switch transistor controlling signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.