Projection screen, and projection type display system

Details Projection screen, and projection type display system Projection screen, and projection type display system

2007-01-23

2007-01-23

Koval, Melissa Jan (Department: 2851)

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

C359S459000, C359S460000, C359S742000, C359S743000

Reexamination Certificate

active

10913488

ABSTRACT:
The invention relates to a projection screen and a projection type display device, wherein projection light projected through a single projector is intensively diffused into at least two areas of view, each having a relatively narrow extent, so that the same image can be simultaneously viewed with both eyes or by at least two viewers. The projection screen1comprises a plurality of Fresnel concave mirrors2L and2R superposed on the same substrate in a mutually decentered fashion, and a diffusing plate is located on the side of the projection screen1on which projection light is incident or at which projection light is reflected.

REFERENCES:
patent: 5457572 (1995-10-01), Ishii et al.
patent: 6700712 (2004-03-01), Servatius et al.
patent: 6989929 (2006-01-01), Watanabe
patent: 2005/0030622 (2005-02-01), Morita et al.
patent: 60-064302 (1985-04-01), None
patent: 2000-122176 (2000-04-01), None

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