Pixel and method for pixel repair

Details Pixel and method for pixel repair Pixel and method for pixel repair

2007-08-07

2007-08-07

Nelms, David (Department: 2871)

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

C349S054000, C349S141000, C349S192000

Reexamination Certificate

active

10971620

ABSTRACT:
A pixel structure and repair method thereof. A through hole is formed in the common line. When the source/drain electrode of a thin film transistor is not electrically connected to a pixel electrode due to a polymer residue remaining in a contact hole, a first laser beam passes through the through hole to weld the source/drain electrode and the pixel electrode. The defective pixel can be thus repaired to display the original color. In addition, if the defective pixel fails due to a defective thin film transistor, the invention irradiates a second laser beam to sever the source/drain electrode such that the defective thin film transistor is not electrically connected to the pixel electrode. The defective pixel can be thus repaired to a dark point.

REFERENCES:
patent: 5946065 (1999-08-01), Tagusa et al.
patent: 6259502 (2001-07-01), Komatsu
patent: 6506617 (2003-01-01), Cheng
patent: 6515720 (2003-02-01), Iizuka et al.
patent: 2002/0163602 (2002-11-01), Lee

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