Color filter, manufacture method thereof, and liquid crystal display unit

Abstract

The invention provides a color filter, wherein at least a black resin matrix with latticed pattern and a painted pattern with candy strip are arranged on a base plate. The black resin matrix cuts the base plate into a plurality of pixels. In at least one part of the painted pattern, the painted patterns are serially arranged in lines on a plurality of linear pixels and on the black resin matrix among the pixels. Each line of the painted pattern has an overlapping part Ox group on the black resin matrix which is in the direction orthogonal to the line direction of the painted pattern, has an overlapping part Oy group on the black resin matrix which is in the direction parallel to the line direction of the painted pattern, and has a couple of pattern edges. By observing one pixel on the linear pixels, it can reach a conclusion that the height hY of the overlapping part Oy relative to the surface of painted pattern in the pixels is lower than the height hX of the overlapping part Ox relative to the surface of painted pattern in the pixels above 0.1 micron.

Description

technical field [0001] The invention relates to a color filter, a manufacturing method thereof, and a liquid crystal display device. Background technique [0002] A color filter is an indispensable component of a liquid crystal display device and a solid-state imaging device. [0003] For example, liquid crystal displays are increasingly used in TVs, and color filters for liquid crystal display devices (liquid crystal displays; LCDs) require higher image quality than current color filters for notebook computers and monitors. In addition, in order to produce large TVs, the size of substrates has increased, and there has been an increased demand for yield improvements and cost reductions. [0004] Regarding the improvement of the above-mentioned image quality, there is the following problem in the manufacture of the color filter: the coloring pattern is raised at the boundary portion between the black matrix and the coloring pixel, and the color filter is not flat, resulting ...

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Problems solved by technology

In addition, in order to produce large TVs, the size of substrates has expanded, and there has been an increase in demand for yield improvements and cost reductions

[0004] Regarding the improvement of the above-mentioned image quality, there is the following problem in the manufacture of the color filter: the coloring pattern is raised at the boundary portion between the black matrix and the coloring pixel, and the color filter is not flat, resulting in a decrease in image quality (for example, refer to Japanese Patent Laying-Open Hei 9- Bulletin No. 113721)

[0008] However, if the method described in Japanese Patent Laid-Open No. 9-113721 is adopted, a large number of steps are required to obtain a black matrix having the above-mentioned taper angle, specifically, forming a black matrix with a photosensitive black composition on a substrate It is a time-consuming and labor-intensive method to apply the positive-type resist after coating and drying, and to adjust the developing speed of the photosensitive black composition and the positive-type resist

Also, when only the taper angle is adjusted, the effect of suppressing the protrusion of the colored pattern is not sufficient

In addition, this technology is not aimed at large substrates (such as large substrates with substrate dimensions of 1m x 1m or more)

[0009] On the other hand, in Japanese Patent Application Laid-Open No. 2003-161826, since the coloring pattern is formed by applying the coloring composition on the substrate by the inkjet method, it is not suitable to suppress the coloring pattern by coating, transfer, etc. of the coloring composition. Protrusion of the coloring pattern at the overlapping portion where the black matrix generated when the coloring pattern is formed overlaps with the coloring pattern

On the contrary, at the boundary between the black matrix and the colored pixels, the black matrix is ​​higher than the colored pixels, resulting in a height difference, and the color filter is not flat, sometimes causing the same problem of image quality degradation

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