LED power supply device
US7135825B2 · kind B2 · utility
7Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2004 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Aug 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED power supply device has a loop circuit formed by a switching circuit, an LED and a comparison circuit, and a reference voltage generation circuit for providing reference voltage to the comparison circuit. The loop circuit oscillates so that substantially constant current is applied to the LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.