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Asymmetrical Electrode Design for AC Gas Panels

IP.com Disclosure Number: IPCOM000048378D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Hairabedian, BZ: AUTHOR [+3]

Abstract

Conventional AC gas panels consist of two sets of conductors of equal widths arranged in orthogonal fashion on glass substrates covered with a dielectric material and separated by a gas-filled chamber. When appropriate electrical stimulation is applied, a plasma will form and emit light. The amount of light depends, among other things, on the width of the rear electrode. Usually the front and the rear electrodes are of equal width, resulting in uniform electrical characteristics, i.e., horizontal and vertical maximum sustain voltages. By designing the rear electrodes wider and the front electrodes thinner, but maintaining the same cross-sectional area at the intersections, the following benefits are realized.

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Asymmetrical Electrode Design for AC Gas Panels

Conventional AC gas panels consist of two sets of conductors of equal widths arranged in orthogonal fashion on glass substrates covered with a dielectric material and separated by a gas-filled chamber. When appropriate electrical stimulation is applied, a plasma will form and emit light. The amount of light depends, among other things, on the width of the rear electrode. Usually the front and the rear electrodes are of equal width, resulting in uniform electrical characteristics, i.e., horizontal and vertical maximum sustain voltages. By designing the rear electrodes wider and the front electrodes thinner, but maintaining the same cross-sectional area at the intersections, the following benefits are realized.

Frontal light emission is increased, while rear light emission is decreased. The minimum sustain voltages and thus the panel margin will not change, and the cell currents are not affected. The side with the narrow electrodes will have less interaction of the panel between cells in the direction perpendicular to the electrodes, especially with respect to patterns and sequences associated with the direction of line by line writing and erasing. The side with the wide electrodes is more sensitive to interaction in a direction perpendicular to the electrodes. However, this effect can be compensated for by designing the line by line writing and erasing direction such that the cell interactions are avoided in the dire...