Image projection display and pick-up apparatus with optical shut

Details Image projection display and pick-up apparatus with optical shut Image projection display and pick-up apparatus with optical shut

1992-08-05

1994-01-25

Weldon, Ulysses

Facsimile and static presentation processing

Static presentation processing

Attribute control

379 53, H04N 714

Patent

active

052820270

ABSTRACT:
An image projection display and pick-up apparatus includes a display screen with controllable tranmissivity, and image projection device behind the screen for projecting an image onto the rear surface of the screen, and an image pick-up device, also located behind the screen, for picking up an image of a viewer located in front of the screen, and an optical shutter for preventing light from the projection device to reach the screen during image pick-up.

REFERENCES:
patent: 2909097 (1959-10-01), Alden et al.
patent: 4400725 (1983-08-01), Tanigaki
patent: 4928301 (1990-05-01), Sinoot

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