Message character image projection control system

Details Message character image projection control system Message character image projection control system

1980-01-23

1981-02-17

Waring, Alvin H.

Communications: electrical

Audible indication

Percussion-type sound producer

340366B, 340380, 340766, G08B 536

Patent

active

042518067

ABSTRACT:
Message character image projection control system, utilizing a matrix array of individually shaped light forming windows and a corresponding array of individual electrically responsive light emitting elements in combination with acousto-optic light reflector means for controlling the optical path relationship between illuminated windows in the matrix and a common optical axis of the system, and additional optics for projecting images of the message character toward a light responsive record medium.

REFERENCES:
patent: 3541542 (1967-09-01), Duguay et al.
patent: 4179689 (1979-12-01), McNaney

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