Light guiding plate made of transparent resin, surface-emitting light source apparatus and process for manufacturing light guiding plate
US7616858B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 2006 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Feb 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guiding plate is made of a transparent thermoplastic resin and has a first main surface, a second main surface opposed to said first main surface, a first side wall, a second side wall, a third side wall opposed to said first side wall and a fourth side wall opposed to said second side wall. The surface portion of the first main surface is provided with convex portions and/or concave portions, and the light guiding plate has a longitudinal-direction length, which is a length from the first side wall to the third side wall, of 40 mm or more but 130 mm or less, at least 80% region of the light guiding plate has a thickness of 0.1 mm or more but 0.55 mm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.