Image display and pick-up apparatus

Details Image display and pick-up apparatus Image display and pick-up apparatus

1993-10-28

1995-06-06

Groody, James J.

Television

Video display

Projection device

348 14, 348 15, 348456, 348756, 348781, 348335, 359625, H04N 714

Patent

active

054226830

ABSTRACT:
An image pick-up and projection apparatus comprising a projection unit (14), a pick-up unit (11) and a projection screen (9) switchable between a transmissive state and a diffusing state. By arranging an array (15) of elongated prismatic elements on the front surface of the screen, the contrast of the projected image is enhanced and it is avoided that a user (12) can simultaneously see the front of the projection unit and the front of the pick-up unit.

REFERENCES:
patent: 2590049 (1952-05-01), Siezen
patent: 4475791 (1984-10-01), Nixon
patent: 4729631 (1988-04-01), Takahashi et al.
patent: 5282027 (1994-01-01), Takahashi et al.
Search Report.

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