Rear projection-type screen and rear projection-type image...

Details Rear projection-type screen and rear projection-type image... Rear projection-type screen and rear projection-type image...

2003-07-15

2008-05-27

Lee, Diane I. (Department: 2851)

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

C359S456000, C359S460000

Reexamination Certificate

active

07379240

ABSTRACT:
A rear projection-type screen includes two sheet-like members having lenses prevented from being deformed and scratched. In the rear projection-type screen (5) for passing and focusing image light L emitted from an image light source (3), two sheet-like members (a lenticular lens sheet7and a Fresnel lens sheet8) each made of a transparent material and having minute lenses (9) and (11) formed on at least one surface thereof are disposed such that their surfaces (7b) and (8a) with the lenses formed thereon confront each other, and a plurality of spacers (14), (14), . . . are disposed at appropriate spaced intervals between the confronting lenses of the two sheet-like members within an effective screen area (5a) for passing and focusing the image light thereon.

REFERENCES:
patent: 5513036 (1996-04-01), Watanabe et al.
patent: 6348993 (2002-02-01), Hori
patent: 6618196 (2003-09-01), Ikari et al.
patent: 2003/0030903 (2003-02-01), Honda et al.
patent: 2001-324766 (2001-11-01), None
patent: 2001324766 (2001-11-01), None
patent: 2002-107829 (2002-04-01), None
patent: 2002107829 (2002-04-01), None

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