Display devices

Details Display devices Display devices

1975-03-03

1977-05-17

Trafton, David L.

Communications: electrical

Systems

With specific power supply

340324M, G08B 536

Patent

active

040245314

ABSTRACT:
A display device using a scanned dot-matrix array produces a running display by shifting the displayed characters by one column at each scan of the array. The characters are fetched from store sequentially and are decoded into dot-matrix form. The dot columns corresponding to each character are then shown sequentially as the display is scanned. The process is repeated at the next scan with a one-column displacement of the characters. In one embodiment the characters are stored in a recycling shift register and the required displacement is achieved by means of a counter incremented at each scan of the array. In another embodiment the characters are stored in a random-access memory and the sequencing and displacement are achieved by means of a preprogrammed micro-computer.

REFERENCES:
patent: 3493956 (1970-02-01), Andrews et al.
patent: 3573790 (1971-04-01), Schulenburg et al.
patent: 3685039 (1972-08-01), Flanagan
patent: 3747073 (1973-07-01), Sharpless
patent: 3750138 (1973-07-01), Burgan et al.
patent: 3913089 (1975-10-01), Albrecht
Newell et al., An Alphanumeric Display as a Communication Aid for the Dumb, Medical and Biological Engineering, Jan. 1975, pp. 84-88.

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