Rear projection image viewing system

Details Rear projection image viewing system Rear projection image viewing system

1987-06-17

1988-01-26

Wintercorn, Richard A.

Photocopying

Contact printing

Light boxes

355 45, G03B 2160

Patent

active

047213612

ABSTRACT:
A rear-projection system by means of which a high brightness and contrast can be obtained in that the projection screen has a maximum transmission for signal light and ambient light. This is achieved by making the surfaces of the projection-screen anti-reflecting as far as possible. A satisfactory contrast is further guaranteed by ensuring that ambient light which has traversed the screen is absorbed in dark layers inside the enclosure. Further steps may be taken in order to prevent ambient light which is incident on the mirror from being reflected back to the screen.

REFERENCES:
patent: 2974565 (1961-03-01), Miller
patent: 3832032 (1974-08-01), Shimada
patent: 3865484 (1975-02-01), Heldenbrand et al.
patent: 4113377 (1978-09-01), Sone et al.
patent: 4482206 (1984-11-01), Van Breemen
patent: 4512631 (1985-04-01), Van Breemen

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