Projection screen device

Details Projection screen device Projection screen device

1990-10-24

1991-08-27

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

358 60, G03B 2160, H04N 931

Patent

active

050429086

ABSTRACT:
A projection screen device for a back projection type television system for projecting an image by emitting beams from a projector, comprising, a lenticular sheet having black strips provided on an emergent surface of the lenticular sheet, a sensor, which is positioned on the black stripes, for outputing a signal when receiving the beams from the projector, a circuit for automatically adjusting a convergence of the beams from the projector and electrical connecting lines for electrically connecting the sensor and edges of the lenticular sheet so as to input the signal to the circuit.

REFERENCES:
patent: 4509823 (1985-04-01), Moriguchi et al.
patent: 4536056 (1985-08-01), Oguino
patent: 4548469 (1985-10-01), Inoue et al.
patent: 4636035 (1987-01-01), Clausen et al.
patent: 4647519 (1987-03-01), Speigel
patent: 4681405 (1987-07-01), Balogh et al.
patent: 4730897 (1988-03-01), McKechnie et al.
patent: 4859027 (1989-08-01), Kishida
patent: 4910010 (1984-12-01), Honda et al.
patent: 4923280 (1990-05-01), Clausen et al.
patent: 4927233 (1990-05-01), Nakanishi et al.

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