Sequentially scanned plasma display for alphanumeric characters

Details Sequentially scanned plasma display for alphanumeric characters Sequentially scanned plasma display for alphanumeric characters

1978-08-08

1981-01-27

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340801, 340802, G06F 314

Patent

active

042478561

ABSTRACT:
Information is displayed in alphanumeric form on a screen of a gas discharge tube having row and column electrodes with intersections. Gas in the tube is ionized in response to a predetermined ionizing voltage existing between the rows and columns at selected intersections to cause a visible signal to be derived at the intersections. Logic means applies ionizing voltages to column electrodes of the screen in a sequential scan. A video scan controller has one input responsive to signals representing coded characters to be displayed column by successive column. A character generator responsive to signals derived from the scan controller activates a controlled logic circuit so ionizing voltages are applied to predetermined row electrodes in the screen to activate the selected intersections to display the coded characters.

REFERENCES:
patent: 3626244 (1971-12-01), Holz
patent: 3832693 (1974-08-01), Ishizaki et al.
patent: 3889253 (1975-06-01), Ross
patent: 3891982 (1975-06-01), Cheek et al.
patent: 3895375 (1975-07-01), Williams
patent: 3938137 (1976-02-01), Ngo et al.
patent: 4121256 (1978-10-01), Lorteise et al.

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