High-brightness LED-phosphor coupling
US7108386B2 · kind B2 · utility
25Cited by
14References
14Claims
0Family size
Assignee
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Key dates
| Filing date | May 12, 2004 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Aug 9, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A high brightness LED phosphor coupling device. A semiconductor light source is encapsulated by a medium of first index of refraction, a layer of phosphor surrounded by a second medium of second index of refraction of optical index less than the first index and a light coupler for redirecting most of the light from the light source to an area of the phosphor about equal to the area of the light source multiplied by the square of the ratio of the first to the second index of refraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.