Driving circuit capable of enhancing energy conversion efficiency and driving method thereof
US8519630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Mar 9, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/3725
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit includes a switch, a detecting unit, a current supply unit, and an energy storage unit. The current supply unit is used for providing a driving current for at least one series of light emitting diodes. The detecting unit is used for comparing a voltage of a first terminal of the detecting unit with a reference voltage to generate a switch control signal. When the switch is turned on according the switch control signal, a first voltage drives the series of light emitting diodes through the switch and the energy storage unit is charged according a charge current. When the switch is turned off according the switch control signal, the energy storage unit drives the series of light emitting diodes according to a discharge current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.