Stacked light-mixing LED
US6525464B1 · kind B1 · utility
24Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Oct 21, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A stacked light-mixing LED includes a main body, more than one connecting parts, a first chip, and a second chip. Two lights with different wavelength in the visible light spectrum area, such as the yellow light and the blue light, or the green light and the red light, are respectively excited and emitted from the first chip and the second chip. By controlling electrical current and voltage, the two lights respectively excited from the first chip and the second chip can be symmetrically mixed into another wavelength of light in the visible light spectrum area, such white light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.