Illumination system and method for recycling light to increase the brightness of the light source
US7976204B2 · kind B2 · utility
36Cited by
10References
35Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 13, 2007 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jun 13, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system for increasing the brightness of a light source comprises an optical recycling device coupled to the light source, preferably light emitting diode (LED), for spatially and/or angularly recycling light. The optical recycling device spatially recycles a portion of rays of light emitted by the LED back to the light source using a reflector or mirror and/or angularly recycles high angle rays of light and transmits small angle rays of light, thereby increasing the brightness of the light source's output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.