Color film substrate and manufacturing method thereof and display device

Abstract

The invention relates to a color film substrate, which comprises a transparent substrate, black matrix units and color resin layers, wherein the black matrix units are arranged on the transparent substrate. The black matrix units respectively comprise a first black sub-matrix and a second black sub-matrix, wherein the first black sub-matrixes respectively serve as a foundation for forming the corresponding color resin layers; the second black sub-matrixes are respectively located on the first black sub-matrixes and are respectively filled among the color resin layers after the color resin layers are formed; the color resin layers formed after the first black sub-matrixes respectively cover on at least one parts of the first black sub-matrixes; and the sum of the thickness of every first black sub-matrix and the thickness of every second black sub-matrix is not less than the minimum thickness value meeting the shading requirement. The color film substrate has the advantages that the angular segment difference of the overlap position of each color resin layer and each corresponding black matrix unit is reduced, the diffusion uniformity of a liquid crystal orientation layer is improved, the thickness of a flat layer is reduced, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a color filter substrate, a manufacturing method thereof, and a display device. Background technique [0002] The color filter substrate is an essential part of liquid crystal display. The traditional color filter substrate usually consists of a transparent substrate 1, a black matrix (Black Matrix, BM) unit 3, a color resin layer 4, a flat layer (Over Coating, OC) 5 and a columnar spacer Object (Post Spacer, PS) 6 composition (such as figure 1 shown). There is an angular difference in the overlapping part of the colored resin layer 4 and the BM unit 3 (the area of ​​the angular difference is figure 1 The area circled in ) requires flattening layer 5 for flattening, and the thickness of BM unit 3 is proportional to its OD value (optical density value). If the OD value of BM unit 3 is too small, there is a risk of light leakage, and if BM unit 3 If it is too thic...

AI Technical Summary

Problems solved by technology

This process has very high requirements on the flatness of the substrate surface. If the angle difference of the color filter substrate is too large, if the flat layer 5 is too thin, even after the flat layer 5 is flattened, it is still easy to cause missing coating and PI coating when coating PI. Uneven diffusion and other defects, thus increasing the thickness of the flat layer and increasing the cost

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