TFT-LCD comprising test pixels, black matrix elements,...

Details TFT-LCD comprising test pixels, black matrix elements,... TFT-LCD comprising test pixels, black matrix elements,...

2005-06-14

2005-06-14

Ton, Toan (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S187000

Reexamination Certificate

active

06906766

ABSTRACT:
A liquid crystal display device includes a first substrate divided into a first active region and a first dummy region surrounding the first active region, a plurality of data lines and gate lines arranged on the first substrate along lengthwise and widthwise directions to define a plurality of pixel regions, a common voltage line formed within the first dummy region, a plurality of active pixels formed within the first active region each having a pixel electrode, a plurality of test pixels formed within the first dummy region each having a pixel electrode, a second substrate divided into a second active region and a second dummy region surrounding the second active region and bonded to the first substrate, a first black matrix formed within the second dummy region having openings corresponding to the test pixels, a second black matrix formed within the second dummy region to overlap the pixel electrodes of the test pixels by a plurality of different widths, and a common electrode formed on the second substrate including the first black matrix and the second black matrix, wherein the common electrode receives a common voltage from a common voltage line.

REFERENCES:
patent: 5285301 (1994-02-01), Shirahashi et al.
patent: 6014193 (2000-01-01), Taira et al.
patent: 6577367 (2003-06-01), Kim
patent: 6836308 (2004-12-01), Sawasaki et al.
patent: 2002/0063834 (2002-05-01), Sawasaki et al.
patent: 2001-42357 (2001-02-01), None

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