Method for increasing contrast ratio of liquid crystal display panel and parallel electric field generating device

Abstract

The invention discloses a method for increasing the contrast ratio of a liquid crystal display panel and a parallel electric field generating device. The method is suitable for a display mode in which the liquid crystal molecule arrangement direction is parallel to the alignment direction. The method comprises the steps that a reactive monomer is increased in liquid crystals, and the liquid crystal display panel attached with the liquid crystals is placed in an electric field generated by the parallel electric field generating device, so that the alignment direction of the liquid crystal display panel is parallel to the parallel electric field direction; the parallel electric field generating device runs, a parallel electric field is applied, therefore, reactive monomer molecules are attached to alignment film molecules, the positive liquid crystals are arranged to be parallel to the electric field direction, the negative liquid crystals are arranged to be perpendicular to the electric field direction, and the liquid crystal molecules are arranged to be parallel to the direction of the reactive monomer molecules. According to the method, due to the fact that the torsion angle of the liquid crystal molecules in the alignment process are corrected or eliminated to the greatest extent, dark-state light leakage is reduced or eliminated, the darkness is enhanced, and then the purpose of increasing the contrast ratio is achieved.

Description

Technical field [0001] The invention belongs to the field of liquid crystal display, and in particular relates to a method for improving the contrast of a liquid crystal display panel and a parallel electric field generating device. Background technique [0002] IPS (In Plane Switching) and FFS (Fringe Field Switching) technologies are both TFT-LCD panel wide viewing angle technologies. Compared with the other camp of VA (Vertical Alignment), IPS and FFS belong to the same family, and are similar in technology and principle. 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 large viewing angles, fast response speeds, accurate color reproduction, and the screen is "hard". Water pattern deformation is not easy to occur with a light swipe with your hand, so it is also called a hard screen to prevent blur and water pa...

AI Technical Summary

Problems solved by technology

[0005] Traditional IPS and FFS alignments use rubbing or optical alignment to arrange liquid crystal molecules along the PI channel. Neither rubbing nor optical alignment can ensure that the PI alignment directions of the upper and lower substrates are completely parallel. In addition, the upper and lower substrates are aligned. It will also produce a twist angle (twist angel), which will lead to light leakage in the dark state, resulting in insufficient contrast

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