Light guide with extraction structures
US6379016B1 · kind B1 · utility
145Cited by
31References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light distribution device having a light-redirecting surface with a plurality of light extraction structures having a riser segment, plateau segment, and facet segment, with adjacent light extraction structures being separated by lands. The light extraction structures improve extraction efficiency, thereby facilitating use of available light from a light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.