Method of testing control matrices for flat-panel displays

Details Method of testing control matrices for flat-panel displays Method of testing control matrices for flat-panel displays

1990-05-04

1991-10-15

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 731, G01R 3102

Patent

active

050577751

ABSTRACT:
An AC signal source (26) in series with a variable DC source (34) drives a gate line of an LCD-display drive matrix (10), and current meters (28, 30, 32) monitor the resultant currents in the drain lines. By comparing the thus-measured transadmittance both with and without enabling values of the DC-source output, one can test the matrix (10) for defects.

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Wisnieff et al., "In-Process Testing of Thin-Film Transistor Arrays", 190 SID 90 Digest, No. 11.2, 6/90.
Nagae et al., "Smectic Liquid-Crystal . . . "; IEEE Trans. on Electron Devices; vol. ED-32; No. 4; Apr. 1985; pp. 744-748.

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