Scroll displaying device

Details Scroll displaying device Scroll displaying device

1993-05-26

1995-04-25

Brier, Jeffery

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

G09G 300

Patent

active

054103304

ABSTRACT:
A scroll displaying mechanism suitable for use in moving advertising displays, chart recorders and tape readers uses a pair of D.C. motors wired to operate under slightly different speed-controlling voltages in order to maintain the displayed part of the scroll between two rollers taut. A simple belt and pulley drive mechanism for each roller assures quiet and vibration-free operation. The viewing time between frame-advance and the scroll direction reversal are controlled by detection of different length markers positioned along one edge of the scroll.

REFERENCES:
patent: 3726031 (1973-04-01), Singer
patent: 4012674 (1977-03-01), Spitsbergen et al.
patent: 4720661 (1988-01-01), Kisakibaru et al.
patent: 4942411 (1990-07-01), Polston

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