Plane light source apparatus, light guide plate and display
US6692133B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 24, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jul 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0086
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plane light source apparatus having a lamp as light source and a light guide plate for directing and emitting the light from the lamp, wherein said light guide has a light incident surface opposed to said lamp and where the light from the lamp enters, a light emitting surface for emitting light from the lamp, and an opposed surface opposed to the light emitting surface, said light emitting surface or said opposed surface extends in the direction opposed to said light incident surface, has a plurality of convexoconcave portions formed to collect substantially light propagating in said light guide plate, and said convexoconcave portions have a flat face formed at the bottom of the concave portion or at the top face of the convex portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.