Method for correcting a defect in a liquid crystal panel

Details Method for correcting a defect in a liquid crystal panel Method for correcting a defect in a liquid crystal panel

1998-09-24

1999-11-23

Sikes, William L.

Liquid crystal cells, elements and systems

Nominal manufacturing methods or post manufacturing...

Defect correction or compensation

349 84, 349158, G02F 113, G02F 11333

Patent

active

059910020

ABSTRACT:
A portion of a transparent substrate corresponding to a defective pixel of a liquid crystal panel is protruded like a dome to a suction hole by decompressing the interior of a vacuum suction head. As a result, the gap between the transparent substrates of the portion corresponding to the defective pixel of the liquid crystal panel becomes greater than that in a surrounding portion. In this state, a laser beam is radiated to the dome-like deformed portion of the transparent substrate in the portion corresponding to the defective pixel, so that a bubble is generated in a liquid crystal layer. The bubble expands in a region shaped like a circle centered at the point where the gap between the transparent substrates is the greatest, on a cross section parallel to the transparent substrates. Thus, the size of the bubble and the range where a substance is scattered are limited, thereby accurately correcting the defective pixel and improving the display quality after the correction.

REFERENCES:
patent: 5142386 (1992-08-01), Ishihara
patent: 5267066 (1993-11-01), Nakai et al.
patent: 5280374 (1994-01-01), Nakai et al.
patent: 5373379 (1994-12-01), Nakai
patent: 5638199 (1997-06-01), Tsubota et al.

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