Nec Lcd Technologies, Ltd.

Nec Corporation

Shoichi Kuroha

Shinichi Nishida

Makoto Watanabe

Kimikazu Matsumoto

Tsutomu Kadotani

Kunimasa Itakura

Masanobu Hidehira

Tatsuya Shiki

Toshikazu Shimizu

Noriaki Sugawara

In an LCD, according to an embodiment of the present invention, a projectionis structured on top of insulation layeron a TFT glass substrateand under part of a black matrix. The projectionencircles the transparent region in each pixel so that a spacercannot climb over the projectionand enter the transparent region even though a certain pressure is applied onto the substratesand. The width of the projectionis equal to or less than the diameter of the spacer. The height of the projectionis equal to or longer than approximately 1% the length of the diameter of the spacer, and it is preferable that it be equal to or longer than approximately 2%.

Liquid crystal display and manufacturing method thereof

A black matrix layeris formed on a counter substratealong the direction where a scanning lineextends, so that it continuously covers the upper parts of a common electrode line, the scanning line, a space between the common electrode lineand the scanning line, a TFT, a space between the scanning lineand a common electrode line, and the common electrode line, and in the portion opposed to the signal line, the black matrix layer is eliminated.

Liquid crystal display device of an in-plane switching mode including a black matrix layer

In an LCD, according to an embodiment of the present invention, a projection is structured on top of insulation layer on a TFT glass substrate and under part of a back matrix . The projection encircles the transparent region in each pixel so that a spacer cannot climb over the projection and enter the transparent region even though a certain pressure is applied onto the substrates and . The width of the projection is equal to or less than the diameter of the spacer . The height of the projection is equal to or longer than approximately 1% the length of the diameter of the spacer , and it is preferable that it be equal to or longer than approximately 2%.

An active matrix type liquid crystal display includes an array of pixels each implemented by a combination of a thin film transistor, a pixel electrode connected through the thin film transistor to a signal line, a common electrode spaced from said pixel electrode and liquid crystal filling the gap between the pixel electrode and the common electrode, and spacers are inserted between a protective insulating layer over back channel regions of the thin film transistors and a planarization layer, wherein the spacers are conductive and fixed to a certain potential level in such a manner as to eliminate the conductivity from the back channel regions.

Liquid crystal display unit with conductive spacers between two substrate structures for biasing back channels of thin film transistors

An active-matrix LCD device drives the LCD panel by using a dot reversible driving technique. The switching between two sets of input signals or two resolution modes is conducted by applying a DC voltage between the pixel electrode and the common electrode in each pixel before restart of the image display of a switched signal. The DC voltage has the same polarity among the pixels in the pixel array to thereby reduce the flicker after the restart of the image display.

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Tokyo, Japan

Shoichi Kuroha