Rear projection screen and optical device thereof

Details Rear projection screen and optical device thereof Rear projection screen and optical device thereof

2008-05-20

2008-05-20

Lee, Diane I. (Department: 2851)

Optical: systems and elements

Projection screen

Rear projection screen

C359S453000, C359S455000, C359S456000, C359S457000

Reexamination Certificate

active

11024407

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.

REFERENCES:
patent: 4431266 (1984-02-01), Mori et al.
patent: 6278546 (2001-08-01), Dubin et al.
patent: 6700702 (2004-03-01), Sales
patent: 6862139 (2005-03-01), Chang et al.
patent: 2003/0169332 (2003-09-01), Ebina et al.

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