LIQUID CRYSTAL DISPLAY DEVICE

摘要

In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.

主权项

1. A liquid crystal display device comprising:
a TFT substrate in which scanning lines, video signal lines, and pixel electrodes are formed; a counter substrate; and a liquid crystal layer interposed between the TFT substrate and the counter substrate, wherein the pixel electrode has strips and a slit portion, wherein a common electrode is formed between the pixel electrode and the TFT substrate through an interlayer insulating film, wherein an opening extending in the direction in which the strips extends is formed in the common electrode, as seen in a plan view, on both outer sides of the end portion of the pixel electrode in the direction in which the scanning lines extend, and wherein the common electrode is formed overlapping the comb-like portion and slit portion of the pixel electrode.