Constant current driving circuit of light emitting diode and lighting apparatus
US8598810B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 2011 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Jan 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/375
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant current driving circuit of a light emitting diode (LED) including a control unit, a buck converter, and a compensation unit is provided. The control unit has an input terminal and an output terminal, and outputs a control signal through the output terminal. The buck converter is coupled to an input power, and is coupled between the output terminal of the control unit and an LED string. The compensation unit is coupled between the LED string and the input terminal of the control unit. The control unit receives a compensation signal of the compensation unit through the input terminal. Besides, a lighting apparatus is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.