Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Patent
1995-04-07
1997-08-26
Malley, Daniel P.
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
359453, 359456, 359400, G03B 2160
Patent
active
056616007
ABSTRACT:
A lenticular lens provided on the viewer side of a transmission type screen is composed of at least two layers, that is, a surface layer and a base layer at least one of which contains a light dispersing material, and a visible light absorbing material is mingled in at least one of these two layers, or in the light dispersing material, thereby enhancing the image contrast of the transmission type screen.
REFERENCES:
patent: Re33795 (1992-01-01), Ogino
patent: 4919515 (1990-04-01), Hasegawa et al.
patent: 5066099 (1991-11-01), Yoshida et al.
patent: 5196160 (1993-03-01), Matsuzuki et al.
patent: 5196960 (1993-03-01), Matsuzaki et al.
Patent Abstracts of Japan, vol. 15, No. 180, (P-1199) 9 May 1991 & JP-A-03 039 944 (Hitachi) 20 Feb. 1991.
Kuwada Hiroshi
Matsuzaki Ichiro
Mitani Katsuaki
Yasumatsuya Noboru
Kuraray Co. Ltd.
Malley Daniel P.
Matsushita Electric Co., Ltd.
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