Lighting panel for a display
US6731355B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Feb 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided a lighting panel having rectangular both surfaces one of which is a reflection surface and the other is a discharge surface, an edge light provided at a corner of the lighting panel. A plurality of prisms are circularly formed on the reflection surface of the lighting panel. Each of the prisms has a vertical angle &thgr; comprising a first inclination angle &thgr;1 on the edge light side and a second inclination angle &thgr;2 opposite to the first inclination angle &thgr;1. There is a following relationship between the first inclination angle &thgr;1 and the second inclination angle &thgr;2&thgr;1(=89.5°˜60°)>&thgr;2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.