Liquid crystal display panel alignment method

Abstract

The invention provides a liquid crystal display panel alignment method. A liquid crystal display substrate comprises a TFT side substrate body, a CF side substrate body and liquid crystal clamped between the TFT side substrate body and the CF side substrate body, wherein both the TFT side substrate body and the CF side substrate body comprises a plurality of opposite pixel units, and each pixel unit comprises a plurality of sub-pixel units in different colors. Taking the arrangement direction of the sub-pixel units in different colors as the line direction and the direction perpendicular to the horizontal direction as the longitudinal direction, the alignment method comprises the steps of irradiating the left half portion of the sub-pixel units in each row with the cross range of the sub-pixel units of every two rows as the period of a TFT side UV2A photomask, and then irradiating the right half portion of the sub-pixel units in each row; irradiating the upper half portion of the sub-pixel units in each row with the longitudinal distance of the sub-pixel units of every two lines as the period of a CF side UV2A photomask, and then irradiating the lower half portion of the sub-pixel units in each row.

Description

technical field [0001] The invention relates to an alignment method of a liquid crystal panel. Background technique [0002] Photo-alignment in liquid crystal display technology is to use linearly polarized ultraviolet light to irradiate the polymer alignment film with photosensitive ability, so that the polymer has alignment ability. The advantage is that it avoids the surface contamination of the glass substrate that may be caused during the contact rubbing alignment process. At the same time, the restriction on the alignment area is relatively low. Multi-domain alignment can be achieved through the mask, and the angle of incident light and the length of irradiation time are used to control the liquid crystal. The parameters of the unit (such as pretilt angle, surface alignment force, etc.). [0003] The existing photo-alignment process includes UV2A alignment process. UV2A (UltraViolet Vertical Alignment) technology is a VA (Vertical Alignment, vertical alignment) panel ...

AI Technical Summary

Problems solved by technology

[0006] However, in the actual production and application of liquid crystal panels, there is a problem of offset between the color filter substrate and the thin film transistor array substrate, especially when the liquid crystal panel is applied to a curved surface product, the offset between the upper and lower substrates will be more obvious

like image 3 As shown, when there is an offset between the upper and lower substrates, the sub-pixels designed by 4Domain have different opening areas in the four liquid crystal alignment regions, and the viewing angle compensation value will be different, resulting in panel viewing angle difference

Similarly, when the size of the pixel is not absolutely rectangular, or due to the influence of peripheral components such as thin-film transistors (TFT), the opening areas of the four domains of the pixel are different, which will cause panel viewing angle difference

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