Rear projection screen and rear projection system comprising suc

Details Rear projection screen and rear projection system comprising suc Rear projection screen and rear projection system comprising suc

1990-07-19

1991-04-09

Wintercorn, Richard A.

350126, G03B 2160

Patent

active

050059459

ABSTRACT:
In a rear projection screen having a large horizontal viewing angle caused by the shape of the first light-spreading elements (51) provided at the front side of the plate (50) the color shift is corrected by providing second light-spreading elements (61) at the rear side of the plate. The second light-spreading elements are aligned approximately parallel to the first light-spreading elements and have a pitch (p) which is considerably smaller than the pitch of the first light-spreading elements. This screen provides a good color correction while the first and the second light-spreading elements are formed in such a way that the screen can be manufactured on an industrial scale without any problem.

REFERENCES:
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patent: 4730897 (1988-03-01), McKechnie et al.
patent: 4762393 (1988-08-01), Gerritsen et al.
patent: 4773731 (1988-09-01), Goldenberg et al.

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