White light emitting diode with first and second LED elements
US7365485B2 · kind B2 · utility
78Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2004 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Sep 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/851
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A white LED (20) for emitting illumination light entirely to exterior, comprising a first LED element (4) and a second LED element (5) which have mutually different emission wavelengths, and a sealing member (10) including a fluorescent material (8) which is excited to emit yellow light (sy) and for sealing at least the first LED element, the first LED element (4) being a long wave length-blue LED element for emitting blue light (sb 1) of a long wave length in which a peak wave length is in the range of 470 nm to 490 nm, the second LED element being a red LED element for emitting red light (sr).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.