Light emitting apparatus and method for manufacturing thereof
US8513872B2 · kind B2 · utility
11Cited by
24References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2011 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Dec 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8514
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light emitting apparatus includes a light emitting device emitting primary light and a wavelength conversion unit absorbing a part of the primary light to emit secondary light. The wavelength conversion unit includes a first wavelength conversion unit containing at least a nanocrystalline phosphor and a second wavelength conversion unit containing a rare-earth-activated phosphor or a transition-metal-element-activated phosphor. In the light emitting device, the first wavelength conversion unit and the second wavelength conversion unit are closely stacked in order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.