Method for optically testing flat panel display base plates

Details Method for optically testing flat panel display base plates Method for optically testing flat panel display base plates

1996-01-16

1997-03-25

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324753, G01R 3100, G01R 31308

Patent

active

056148399

ABSTRACT:
A flat panel display plate (10) comprising part of a liquid crystal display device is tested by overlying the plate with a probe plate (18) comprised of light-transmissive electrode (22) a light-transmissive electrode support (20), and a sensing layer (24). The probe plate in combination with the flat panel display plate (10) realize a conventional liquid crystal display device whose operation depends on the operability of the flat panel display plate. Thus, by observing the liquid crystal display device realized by the combination of the flat panel display plate (10) and the probing plate (18), defects in the flat panel display plate can be detected.

REFERENCES:
patent: 4906922 (1990-03-01), Takahashi et al.
patent: 5034683 (1991-07-01), Takahashi et al.
patent: 5124635 (1992-06-01), Henley
patent: 5309108 (1994-05-01), Maeda et al.
patent: 5406213 (1995-04-01), Henley
patent: 5465052 (1995-11-01), Henley
patent: 5504438 (1996-04-01), Henley

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