Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-10-29
1994-02-22
Powell, Mark R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
353 71, 353 74, 348789, 348794, H04N 574
Patent
active
052892875
ABSTRACT:
A projection television system which adapts automatically between from screen projection and rear screen projection upon insertion of the projector into a rear screen cabinet. A compact projection unit has a quick-disconnect electric connector and optical aligner which mate with connection elements in a projection cabinet upon insertion of the projector into an opening in the front of the cabinet. The cabinet has a two-mirror optical relay which inverts the projected picture. Upon completion of insertion, the electric connections automatically invert the image being projected by the projector. In another embodiment, insertion also automatically connects to audio equipment in the rear screen cabinet.
REFERENCES:
patent: 3807847 (1974-04-01), Okano
patent: 3885868 (1975-05-01), Hadzimihalis
patent: 3951518 (1976-04-01), Kobayashi et al.
patent: 4163610 (1979-08-01), Sanderson
patent: 4273396 (1981-06-01), Teragaki et al.
patent: 4572632 (1986-02-01), Bodier et al.
patent: 5090800 (1992-02-01), Ushiro
patent: 5173781 (1992-12-01), Masreliez
Brown Larry S.
Dargis Daniel J.
Sharp Jeffrey L.
North American Philips Corporation
Powell Mark R.
Treacy David R.
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