Casio Computer Co., Ltd.

Hidehiro Morita

Ryota Mizusako

Masazumi Shikanai

Yosihisa Kato

A liquid crystal display device comprises a TFT substrate, a CF substrate, a liquid crystal with negative dielectric anisotropy filled between the substrates, a pixel electrode provided on the TFT substrate, and an auxiliary electrode formed around the pixel electrode. A slit for segmenting a pixel region into a plurality of sub-pixel regions is formed in the pixel electrode from the center portion of each pixel toward the periphery portion thereof. The auxiliary electrode has a transparent step film formed at a position corresponding to the slit of the pixel electrode in such a way as to overlie the auxiliary electrode. Molecules of the liquid crystal of each sub-pixel region are aligned toward center of the sub-pixel region from the circumference of the sub-pixel region by a horizontal electric filed applied between the pixel electrode and auxiliary electrode, and the shape of the end portion of the transparent step film.

Vertical alignment active matrix liquid crystal display device having particular reflection metal films

Vertical alignment active matrix liquid crystal display device having particular transparent step films

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.

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Hachioji, Japan

Hidehiro Morita