White light emitting device
US7227190B2 · kind B2 · utility
45Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2003 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Oct 2, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A purple LED is fixed onto lead frames in the cup of a frame using a mount, and the purple LED is sealed by filling a sealant of transparent resin into the cup. Red/green/blue phosphors that absorb a light emitted by the purple LED and emit lights having red, green, blue wavelengths different from the wavelength of this absorbed light are mixed into the sealant. A yellow phosphor that absorbs a light emitted by the purple LED and emits a light having a yellow wavelength different from the wavelength of this absorbed light is additionally mixed into the sealant in such a white light emitting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.