Motorized video projection screen control with digital interface

Details Motorized video projection screen control with digital interface Motorized video projection screen control with digital interface

1989-02-02

1990-05-08

Shoop, Jr., William M.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318266, 307112, H02P 122, H02J 100

Patent

active

049241575

ABSTRACT:
A device for controlling a motorized video projection screen, which allows for remote to the screen adjustability for repeatable positioning of the viewing surface, with the ability to interface, via digital logic, with any device capable of sinking enough current at 5 volts to hold the logic lines in the low state; most notably by computer interface cards.

REFERENCES:
patent: 4005387 (1977-01-01), Herring et al.
patent: 4092574 (1978-05-01), Hansen et al.
patent: 4482850 (1984-11-01), Sonoda et al.
patent: 4549233 (1985-10-01), Teranishi et al.

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