Light-emitting device and manufacturing method thereof
US6809342B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2003 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Apr 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/856
Abstract
In the light-emitting device provided with the conventional wavelength converter, colors became irregular, and light radiated to a side of the semiconductor light-emitting element from the wavelength converter could not be used as radiation light, thus lowered the conversion efficiency. The present invention improves the availability of the light from the wavelength converter 5 and resolves the problems by realizing a composition of an LED lamp, wherein a light-radiation-direction-limiter 4a and reflector 4b around it are mounted on a substrate 4, a wavelength converter 5 is mounted on a proper position to cover a part of the light-radiation-direction-limiter 4a and the reflector 4b, and among the light whose wavelength gets converted from fundamental wavelength-light into wavelength-converted light at the wavelength converter 5, both the wavelength-converted light transmitted through the aforementioned wavelength converter 5 and radiated to the front face as direct light, and the wavelength-converted light radiated to the inner face of the wavelength converter 5, by reflecting towards the radiation direction of this light-emitting 1 by the reflector 4b, can be taken out as output …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.