Reflecting screen

Details Reflecting screen Reflecting screen

1998-05-08

1999-05-11

Nguyen, Thong

Optical: systems and elements

Diffusing of incident light

359707, 359834, G02B5/02;13/20

Patent

active

059033924

ABSTRACT:
This invention provides a reflecting screen with a wide angle of field and high luminance usable in a video projector or the like, and comprising a first sheet having a first surface having a diffusion layer for diffusing a projected image, and a second surface formed on a side opposite to the first surface and having a group of striped prisms of an optically transparent resin arranged so as to extend vertically, the prisms having a section in the shape of an isosceles triangle with a constant apical angle and sides of constant length; and a second sheet opposed to the group of prisms of the second surface of the first sheet, a surface of the second sheet opposed to the group of prisms being of a black color capable of absorbing transmitted light substantially; the first sheet and the second sheet being disposed parallel to each other.

REFERENCES:
patent: 4906070 (1990-03-01), Cobb, Jr.
patent: 5187611 (1993-02-01), White et al.
patent: 5212596 (1993-05-01), Andrus
patent: 5467417 (1995-11-01), Nakamura et al.
patent: 5550676 (1996-08-01), Ohe et al.

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