Screen for liquid crystal projector

Details Screen for liquid crystal projector Screen for liquid crystal projector

1995-06-05

1998-02-03

Malley, Daniel P.

Optical: systems and elements

Projection screen

G03H 126, G02B 532

Patent

active

057150834

ABSTRACT:
A screen for a liquid crystal projector is provided on which an image formed by the output light from a liquid crystal projector can be recognized even in the presence of extraneous light. The screen is used for a color liquid crystal projector for projecting an image formed on a liquid crystal onto the screen by causing the light from a light source to be transmitted through or reflected from the liquid crystal. Lippman-type holograms (BS, GS, RS) having great reflectances with respect to only the wavelength band of output light of the liquid crystal projector are formed on the screen. As the screen reflects substantially only the output light of the liquid crystal projector and absorbs light having other wavelengths, the reflection of extraneous light is suppressed as much as possible. Therefore, the image projected by the liquid crystal projector is recognizable even in the presence of extraneous light.

REFERENCES:
patent: 5011244 (1991-04-01), Smith et al.
patent: 5135300 (1992-08-01), Toide et al.
patent: 5187597 (1993-02-01), Kato et al.
patent: 5347644 (1994-09-01), Sedlmayr

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