Circular plasma charge display device
AssigneeNCR Corporation
InventorsHerman Albertine, Jr., Donald G. Craycraft, William E. Coleman
Life of this patent
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Abstract
A plasma charge display device having a channel containing an ionizable medium with the channel defining an endless length as in the case of a circular channel. At least one input electrode is located in a first position, and transfer electrodes extend away from the input electrode on opposite sides thereof completely along the length of the channel. Gas ionization results in the formation and shifting of light emitting areas in either direction relative to the position of the input electrode. The transfer electrode positions are related to the input electrode position in a manner such that the light emitting areas can be shifted through the position of the input electrode from one side to the other thereof.
Claims11
In a plasma charge transfer device of the type having a channel containing an ionizable medium, said channel being defined within a walled structure, at least one wall thereof being transparent, input and transfer electrodes positioned on inside wall surfaces, said transfer electrodes being arranged in alternating sequence and offset from one another on opposite inside wall surfaces, and means for applying a potential difference between adjacent electrodes whereby the medium will emit light proximate said adjacent electrodes and leave a charge proximate one of the adjacent electrodes, the improvement wherein:
- said channel comprises an endless length, a single input electrode is utilized located at a first position along the length of said channel, said transfer electrodes extending along the entire length of said channel whereby sequential application of potential differences enables shifting of light emission and charge positions in either direction relative to said first position.
In a plasma charge transfer device of the type having a channel containing an ionizable medium, said channel being defined within a walled structure, at least one wall thereof being transparent, input and transfer electrodes positioned on inside wall surfaces, said transfer electrodes being arranged in alternating sequence and offset from one another on opposite inside wall surfaces, and means for applying a potential difference between adjacent electrodes whereby the medium will emit light proximate said adjacent electrodes and leave a charge proximate one of the adjacent electrodes, the improvement wherein:
- said channel comprises an endless length, said transfer electrodes extending along the entire length of said channel, a pair of input electrodes are provided at said first position, one on each side of the device and offset from one another, means for applying a potential difference between the input electrodes, whereby a charge is developed proximate one input electrode for shift away from said first position in one direction, and a charge is developed proximate the other input electrode for shift away from said first position in the other direction.
Dependencies are inferred from the claim text.