Method and apparatus for defect detection and location

Details Method and apparatus for defect detection and location Method and apparatus for defect detection and location

1989-08-16

1990-07-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250563, G01N 2188

Patent

active

049437321

ABSTRACT:
Methods and apparatus for locating defects in liquid crystal display (LCD) panels include scanning the panel with a laser, detecting reflected, refracted, scattered or transmitted light, and processing signals representative of the detected light utilizing a digital processor, to detect discontinuities in the arrays of LCD elements on the panel.

REFERENCES:
patent: 4417149 (1983-11-01), Takeuchi et al.
patent: 4851696 (1989-07-01), West

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