Light source of LED and method for producing light source with varying color while dimming
US8330394B2 · kind B2 · utility
3Cited by
5References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Feb 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source of LED includes at least one first LED and at least one second LED. The first LED has a first optical illuminant characteristic varying with a variable operation voltage from a first level to a second level, wherein the first level is larger than the second level. The second LED has a second optical illuminant characteristic varying with the variable operation voltage from a third level to a fourth level, wherein the third level is smaller than the fourth level. The first LED and the second LED are simultaneously controlled by the same variable operation voltage to produce a light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.