Control circuit for LED lighting apparatus
US9655187B2 · kind B2 · utility
2Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2016 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Feb 3, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a control circuit of an LED lighting apparatus which is capable of improving power efficiency. The control circuit controls light emission of one or more LED groups in response to changes of a rectified voltage, and includes a current source configured to provide a primary current using a driving current outputted through a current path of a driver and a secondary current using a rectified current provided to a plurality of LED groups. Thus, the control circuit can perform a charging operation using a current provided from the current source, and provide a charge voltage to an additional device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.