Rear projection screen and optical device thereof
US7375884B2 · kind B2 · utility
0Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2004 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Apr 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A rear-projection screen comprises an optical unit, a light-blocking layer, and an optical lens. The optical unit has a first surface and a second surface. The first surface is opposite to the second surface. The first surface has a plurality of cylindrical convexes and the second surface has a plurality of irregular protruding parts. The light-blocking layer adjoins to the second surface and has a plurality of striped light-absorbing units. The optical lens is disposed adjacent to the optical unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.