Light emission device and method utilizing multiple emitters and multiple phosphors
US7564180B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light emission device, including at least two LED dies having differing spectral output from one another; and phosphor material including one or more phosphors, arranged to receive spectral output from at least one of the LED dies and to responsively emit a phosphor output, as a component of a spectral output of the light emission device. In a specific arrangement, the multiple LED dies and phosphor material are arranged to produce a white light output having a color temperature selected from among (i) color temperature in a range of from 1350° K to 1550° K, (ii) color temperature in a range of from 2400° K to 3550° K and (iii) color temperature in a range of from 4950° K to 6050° K.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.