Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Patent
1990-04-24
1991-11-19
Wintercorn, Richard A.
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
359453, 359599, G03B 2160
Patent
active
050660993
ABSTRACT:
A rear projection screen for use in a rear projection image display device comprises one or more sheet members through which light is sequentially transmitted from the side of a plane of incidence of the screen, the last sheet member comprising a transparent material as a base thereof, and a light diffusing layer provided on the side of a plane of emergence of the base. A light diffuser having a refractive index different from that of the base may be dispersed in the base so as to contrive a greater viewing angle. Further, a transperent binder for supporting the light diffuser dispersed in the light diffusing layer or the light diffuser itself may be colored in order to obtain a further enhanced contrast.
REFERENCES:
patent: 4752116 (1988-06-01), Sekiguchi
Hirata Koji
Konuma Nobuhiro
Muranaka Masayuki
Teratani Masakuni
Yoshida Takahoko
Hitachi , Ltd.
Wintercorn Richard A.
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