Wedge light extractor with risers
US6347874B1 · kind B1 · utility
65Cited by
31References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wedge-shaped light extractor having a light-redirecting surface with a plurality of projections having a riser segment, a plateau segment, and a facet segment, with land segments flanking the projections. The projections improve extraction efficiency, thereby facilitating use of available light from a light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.