Gray scale for planar gas discharge display devices

Details Gray scale for planar gas discharge display devices Gray scale for planar gas discharge display devices

1974-11-04

1976-04-27

Britton, Howard W.

Telegraphy

Systems

Simplex-reversing periodic

313188, 315169TV, 358 59, H04N 544

Patent

active

039536726

ABSTRACT:
A two-dimensional planar display device includes a plurality of plasma discharge shift registers positioned along rows of a display matrix. Each resolution element along a row includes two stable discharge locations, a first of which is optically masked. Modulating the duration of propagation signals associated with the second discharge location, the duration for propagation signals for the entire resolution element being constant, permits the generation of continuously variable brightness levels. In a preferred embodiment, glow discharges propagating down an additional one or more column shift registers are sequentially coupled to row shift registers to permit rapid scanning over the entire two-dimensional array.

REFERENCES:
patent: 3733435 (1973-05-01), Chodil
patent: 3771008 (1973-11-01), Chen et al.
patent: 3798502 (1974-03-01), Ngo
patent: 3821721 (1974-06-01), Hughes
patent: 3838209 (1974-09-01), Tsuchiya
patent: 3839713 (1974-10-01), Urade et al.
patent: 3839715 (1974-10-01), Andoh
patent: 3866209 (1975-02-01), Weimer

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