Light emitting module, method of manufacturing the light emitting module, and lamp unit
US8669575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2009 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8583
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a light emitting module 40, light wavelength conversion ceramic 58 converts the wavelength of the light emitted by a semiconductor light emitting element 52. The light wavelength conversion ceramic 58 is made so transparent that the light wavelength conversion ceramic 58 has 40 percent or more of the total light transmittance of the light with a wavelength within the conversion wavelength range. A reflective film 60 is provided on the surface of the light wavelength conversion ceramic 58 and narrows down the emission area of the light that has transmitted the light wavelength conversion ceramic 58 to an area smaller than the light emitting area of the semiconductor light emitting element 52. In the case, the reflective film 60 guides the light such that the light is emitted in the direction approximately parallel to the light emitting surface of the light emitting element 52.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.