Illumination device
US7052168B2 · kind B2 · utility
91Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2003 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Feb 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination system includes a light guide for distributing light. Extraction structures are provided to uniformly extract light from the light guide. The structures extract more light out of the light guide when light is propagating in the light guide in a direction toward the light input area than when light is propagating in the light guide in a direction away from the light input area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.