Gas discharge display apparatus capable of emphasis display

Details Gas discharge display apparatus capable of emphasis display Gas discharge display apparatus capable of emphasis display

1981-10-15

1984-12-04

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340768, 340771, 340805, 340793, G09G 300

Patent

active

044867476

ABSTRACT:
A gas discharge display apparatus comprises at least a number of anodes and cathodes each disposed in opposition to each of the anodes so that the anodes and the cathodes are arrayed alternately with each other. The anodes and the cathodes are wired, respectively, in polyphase connections. Discharge stabilizing resistors are connected in series to the polyphase connections leading to either the anodes or cathodes. Pulse voltages are successively applied to the anodes and the cathodes so that the discharge produced between both electrodes is caused to perform self-scanning, while the pulse voltages are applied to the polyphase connections leading to the anodes during a period determined in accordance with an input signal to be displayed, thereby to produce discharge between selected ones of anodes and cathodes determined in accordance with the input signal, said discharge being imparted with a memory effect. By controlling pulse duration of the pulse voltages applied during the period determined by the input signal, brightness of display element(s) selected in accordance with the input signal is controlled in a rather arbitrary manner.

REFERENCES:
patent: 3334269 (1967-08-01), L'Heureux
patent: 3876906 (1975-04-01), Walters
patent: 3953886 (1976-04-01), Ngo
patent: 4009414 (1977-02-01), Bockett-Pugh
patent: 4233544 (1980-11-01), Coleman
patent: 4247802 (1981-01-01), Kurokawa
patent: 4253044 (1981-02-01), Smith

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