Browse Prior Art Database

Pattern Testing of Gas Display Panel with Minimum use of Computers and Direct Display of Faults

IP.com Disclosure Number: IPCOM000077376D
Original Publication Date: 1972-Jul-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Klein, M: AUTHOR

Abstract

The system described herein performs pattern tests on gas display panels or other light-emitting matrix display devices.

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Pattern Testing of Gas Display Panel with Minimum use of Computers and Direct Display of Faults

The system described herein performs pattern tests on gas display panels or other light-emitting matrix display devices.

In the figure wherein there is shown an illustrative embodiment of the described system, at computer terminal 10 there are obtained signals corresponding to previously programmed and stored test patterns, such signals suitably being provided by the telephone line 11. The panel address and drive circuits 12 which are designed for a display system are employed to operate the panel under test 14. The panel address and drive circuits 12 in turn concurrently operate a reference panel 16. The address duplexer 18 and the sustain synchronizer 20 are, respectively, employed to duplex the address signals to the reference panel 16, and to provide sustain signals to reference panel 16 in synchronism with test panel 14. The panel address and drive circuits 22 are similar to those of stage 12 and are concerned with the operating of reference panel 16.

The displays on panels 14 and 16 are scanned simultaneously by image tubes 24 and 26, respectively, image tubes 24 and 26 receiving raster scanning signals from the common raster scan generator 28, the electrical outputs from image tubes 24 and 26 all combined in a difference circuit 30. The difference signals outputs from difference circuit 30 are employed to switch the beam of a cathode-ray tube 32, which receives...