Dimmable LED device with low ripple current and driving circuit thereof
US8193738B2 · kind B2 · utility
33Cited by
1References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2009 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Oct 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimmable light emitting diode (LED) device with low ripple current includes a LED module, a phase dimmer, a voltage converting module, a driving module and a feedback module. The flyback converter of the voltage converting module adds a secondary forward winding connecting to a phase cut-off detector to provide a detecting voltage in proportion to current level of the output current across the LED module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.