Surface light source and liquid crystal display including the same
US7995161B2 · kind B2 · utility
0Cited by
6References
5Claims
0Family size
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Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Nov 3, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surface light source includes a light source and an optical waveguide plate. The light source serves to emit light. The optical waveguide plate has an incident end face where the light is incident and a light exit surface where the light incident on the incident end face exits. Further, the optical waveguide plate has a refractive index n. The incident end face has a plurality of concave portions. The angle between a plane formed by the plurality of concave portions and a tangent plane of the incident end face is not more than (90−2·arcsin(1/n)) degree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.