Browse Prior Art Database

Gas Panel Operation

IP.com Disclosure Number: IPCOM000084076D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Aboelfotoh, MO: AUTHOR [+2]

Abstract

In a gaseous discharge display panel, parallel conductor arrays are formed on a pair of glass plates with the conductor arrays being substantially orthogonal to each other. These arrays are then covered with a dielectric to eliminate direct contact between the conductors and the gas, and the dielectric surface in contact with the glass having a surface of a refractory material having high secondary emission characteristics such as magnesium oxide. By selectively firing single or multiple discharge sites, the resulting firing of orthogonal conductors produces a display.

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Gas Panel Operation

In a gaseous discharge display panel, parallel conductor arrays are formed on a pair of glass plates with the conductor arrays being substantially orthogonal to each other. These arrays are then covered with a dielectric to eliminate direct contact between the conductors and the gas, and the dielectric surface in contact with the glass having a surface of a refractory material having high secondary emission characteristics such as magnesium oxide. By selectively firing single or multiple discharge sites, the resulting firing of orthogonal conductors produces a display.

A close relationship exists between the panel firing voltage and the secondary electron emission of the panel. A material having a high coefficient of secondary emission as well as refractory properties to protect the inner surface of the panel, is magnesium oxide. Utilizing a magnesium oxide overcoating the dielectric, the electrodes show a pronounced spreading of the discharge along the drive conductor which can produce crosstalk or firing of unselected cells.

By utilizing magnesium oxide spots only at the cell areas and utilizing another refractory material such as aluminum oxide in the adjacent areas around the cells, the tendency of the discharge to spread is eliminated or substantially reduced.

Referring to the drawing, a glass plate 1 has conductors 3 formed thereon, the connectors being insulated from contact with the gas by dielectric 5. A refractory material 7 having a lower secondary emission than magnesium oxide, such...