Optical: systems and elements – Projection screen
Patent
1993-04-20
1994-05-31
Wintercorn, Richard A.
Optical: systems and elements
Projection screen
359449, 359451, G03B 2156
Patent
active
053174496
ABSTRACT:
A projection television set in which a seamless image may be obtained on a screen. A screen plate of a screen assembly is held under a suspended state by a frame in a state wherein the left and right parts are centered in the frame. A cruciform light-shielding frame is mounted on the frame. A light-shielding plate is swingably mounted on a horizontal light-shielding frame of the frame. The position of the light shielding plate is adjusted in response to the vertical movement of a horizontal joint. Also, the horizontal joint line adjusting mechanism is provided independently of a centering mechanism for a vertical joint line.
REFERENCES:
patent: 3992841 (1976-11-01), Ward, Jr.
patent: 4318589 (1982-03-01), Brown et al.
patent: 4668046 (1987-05-01), Yatabe et al.
patent: 4984871 (1991-01-01), Martinez
patent: 5011263 (1991-04-01), Hopper
patent: 5011277 (1991-04-01), Ogino et al.
patent: 5103339 (1992-04-01), Broome
patent: 5206760 (1993-04-01), Nakashima et al.
Furuno Takashi
Hagiwara Kanehiro
Iizuka Jun
Mitake Mitsuyoshi
Wakasa Toshiya
Pioneer Electronic Corporation
Wintercorn Richard A.
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