Browse Prior Art Database

Eliminating Gas Impurities in a Gas Display Panel

IP.com Disclosure Number: IPCOM000078507D
Original Publication Date: 1973-Jan-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 3 page(s) / 48K

Publishing Venue

IBM

Related People

Ahearn, WE: AUTHOR [+2]

Abstract

In a gas discharge display/storage device, contamination of the gas affects the electrical margins of the gas panel as well as the intensity of the result light output. Such impurities, primarily air constituents, can be permanently removed from a Penning gas mixture of a gas discharge display panel as follows: A gas panel 1 is composed of two glass substrates 2 and 3, on which orthogonal conductors 4 and 5 have been deposited prior to sealing the glass plates. Conductors 4 and 5 run across the panel, their intersections defining gaseous discharge cells, and are insulated from direct contact with the gas by a layer of dielectric.

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Eliminating Gas Impurities in a Gas Display Panel

In a gas discharge display/storage device, contamination of the gas affects the electrical margins of the gas panel as well as the intensity of the result light output. Such impurities, primarily air constituents, can be permanently removed from a Penning gas mixture of a gas discharge display panel as follows: A gas panel 1 is composed of two glass substrates 2 and 3, on which orthogonal conductors 4 and 5 have been deposited prior to sealing the glass plates. Conductors 4 and 5 run across the panel, their intersections defining gaseous discharge cells, and are insulated from direct contact with the gas by a layer of dielectric.

The viewing area of the panel is indicated within the border 7. A direct discharge electrode cell in the tubulation 9 of the gas panel is operated in pulse mode, and initially excited by a pulsed signal above the initial sparking operating potential. The inner electrodes comprising cathode 10 and anode 11, which may be composed of nickel, titanium, tantalum, zirconium or other suitable metals, provides a gettering action by sputtering the metallic material on the glass wall of the tubulation which, in turn, absorbs oxygen or nitrogen, the most prevalent impurities in the gas. In addition, the metal comprising electrodes 10, 11 combines with the oxygen or nitrogen to form a metallic oxide or nitride on the surface of the electrodes. After a few minutes of operation in a pulse mode, the surface of cathode 10 is cleaned, the discharge noise is reduced and the glow wandering effect noted during the initial operation disappears.

One of the steps in a gas panel fabrication is the burn-in procedure, which is designed to stabilize the electrical characteristics of the panel and represents one of the final steps...