Communications: electrical – Systems – Portable self-contained
Patent
1974-11-29
1976-08-17
Curtis, Marshall M.
Communications: electrical
Systems
Portable self-contained
315169TV, 340343, G09F 932
Patent
active
039757250
ABSTRACT:
The display panel includes a base plate which carries a plurality of pairs of scanning cathodes and display cathodes, oriented in columns, and insulating spacers which, in each pair, separate the scanning and display cathodes into operative pairs, with the pairs being arrayed in rows and columns. The panel also includes a face plate which carries a plurality of anode strips, oriented in rows, each strip overlaying and having a portion in operative relation with a row of scanning and display cathode pairs. In each pair of cathodes, only the display cathode is visible to a viewer. The face plate and base plate are sealed together to form an envelope which is filled with a gas suitable for supporting cathode glow.
In one mode of operation of the panel, each column of scanning cathodes is energized at a relatively low level, and then selected display cathodes in the associated column are energized at viewing level. Then, the same column of scan cathodes is re-energized, and glow is then transferred to the next adjacent column of scan cathodes where the cycle is repeated. This operation is carried out through the columns of scan and display cathodes in the panel sequentially at such a rate that a changeable but apparently stationary message is displayed by the total number of display cathodes energized.
REFERENCES:
patent: 3683364 (1972-08-01), Holz et al.
patent: 3769543 (1973-10-01), Pennebaker
patent: 3781587 (1973-12-01), Lustig et al.
patent: 3863090 (1975-01-01), Pennebaker, Jr.
patent: 3866090 (1975-02-01), VanGelder et al.
Burroughs Corporation
Curtis Marshall M.
Green Robert A.
Penn William B.
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