Browse Prior Art Database

Gas Panel Testing Method

IP.com Disclosure Number: IPCOM000085058D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Aboelfotoh, MO: AUTHOR

Abstract

After a gaseous discharge display panel has been fabricated, various testing procedures are employed to test the operating characteristics of the panel. One of these tests consists of applying operating voltages at elevated temperatures to alternate lines in the panel for a predetermined period, and then comparing the operating characteristics of the two sets of alternate lines.

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Gas Panel Testing Method

After a gaseous discharge display panel has been fabricated, various testing procedures are employed to test the operating characteristics of the panel. One of these tests consists of applying operating voltages at elevated temperatures to alternate lines in the panel for a predetermined period, and then comparing the operating characteristics of the two sets of alternate lines.

Many of the panels tended to diverge in operating characteristics, i.e., the excited lines required lower operating voltages while the non-excited lines required higher operating voltages, thereby decreasing the operating margin of the panel. This effect, designated alternate line aging, may result from the migration of impurity ions on the surface of the dielectric layer under the action of the discharge from the aged to the unaged areas.

A technique to eliminate or substantially reduce the alternate line aging characteristic of a gas panel operates as follows. Referring to the drawing, a series of interconnected lines designated 1', 2', 3', etc., are positioned between the normal horizontal lines 1, 2, 3, etc.. The cell locations are at the intersection of horizontal lines 1-5 and the vertical lines 6-11.

During the burn-in process in which all cells of the panel are operated at a specified voltage for a period of hours, a zero voltage is applied across these cells at the intersection of the vertical lines and horizontal lines 1', 2', 3', etc.,and the vertical l...