Light emitting diode driving circuit and light emitting diode lighting device
US10470268B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2016 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Mar 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The LED driving circuit includes: a detecting circuit that detects whether an input current of the driving circuit is low or high frequency; a first stage converter that converts the input of the driving circuit to provide a DC power suitable for the LED; a first feedback loop that is activated by a low frequency current, to convert a current from a LED load to a feedback voltage and feed it back to the first stage converter, wherein in the first feedback loop, the feedback voltage changes as a function of the current of the LED load; and a second feedback loop that is activated by high frequency current, to convert the current from the LED load to the feedback voltage and feed it back to the first stage converter, wherein in the second feedback loop, the feedback voltage changes as a function of the current of the LED load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.