Liquid crystal display device

Abstract

The invention discloses a liquid crystal display device. According to the device, liquid crystal molecules are between an upper substrate and a lower substrate, wherein the lower substrate comprises a first pair of electrodes and a second pair of electrodes; a first pixel electrode and a first common electrode generate a first electric field, which drives the liquid crystal molecules to twist from the initial position to the preset position; a second pixel electrode and a second common electrode generate a second electric field, which drives the liquid crystal molecules to return from the preset position to the initial position; meanwhile, reactive monomer molecules are added to the liquid crystal molecules, when in on-state, the reactive monomer molecules of the liquid crystal molecules are driven by the second electric field to be arrayed according to the preset mode so that the arraying direction of the liquid crystal molecules is consistent. According to the liquid crystal display device, the distribution of the liquid crystal molecules can be optimized, the torsion angle generated in the orientation process of the liquid crystal molecules can be amended or eliminated to a maximum extent, and thus the dark state light leakage can be reduced or eliminated, the contrast degree can be improved, and the recovery time of the liquid crystal molecules in off-state is reduced.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal display device capable of improving response speed and display contrast. Background technique [0002] IPS (In Plane Switching) and FFS (Fringe Field Switching) technologies both belong to the wide viewing angle technology of TFT-LCD panels. Compared with VA (Vertical Alignment) of another camp, IPS and FFS belong to the same family and are similar in technology and principle . The wide viewing angle technology is mainly to make the viewing angle of the panel wider, and also contribute to the performance of other characteristics such as image quality and brightness. [0003] IPS and FFS panels have a large viewing angle, fast response speed, accurate color reproduction, and the screen is relatively "hard", and it is not easy to appear water-like deformation when swiping lightly with the hand, so it is also called a hard screen to preve...

AI Technical Summary

Problems solved by technology

Neither rubbing nor optical alignment can guarantee that the PI alignment directions of the upper and lower substrates are completely parallel. In addition, twist angles (twistangel) will also occur when the upper and lower substrates are aligned, which will cause light leakage in the dark state. Compared with VA, the dark state is not dark enough. The contrast is relatively low, and the liquid crystal molecules return to the initial state under the action of the anchoring force of the PI layer in the off state, and the response time is slower compared with TN

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