Colorant, color filter, LCD device, composition and preparation

Abstract

The invention relates to a colorant, a colored filter, a liquid crystal display (LCD), a composition and a preparation method thereof. The colorant covers pigment grains through acrylic polymer which comprises aromatic groups and has the acid value of more than 20mgKOH/g, thus not only improving the dispersing capacity of the pigment grains but also greatly enhancing the stability of the pigment grains. A photosensitive resin composition with the colorant ensures that the development performance is not affected basically, thereby meeting the requirements of high transmittance, high color purity and high contrast ratio of the colored filter. With the picture formed by the photosensitive resin composition with comparatively high dispersing stability and development performances, the coloredfilter greatly improves the transmittance, color purity and contrast ratio. The LCD remarkably improves the display effect of colored pictures through the colored filter with high transmittance, highcolor purity and high contrast ratio.

Description

technical field [0001] The invention relates to a color filter, in particular to a colorant capable of improving the color display effect of a liquid crystal display device, a color filter, a liquid crystal display device, a photosensitive resin composition and a preparation method thereof. Background technique [0002] The color filter is the key to realize the color display of liquid crystal display (LCD), and its production methods include dyeing method, pigment dispersion method, printing method, electroplating method, inkjet method and so on. Due to the advantages of the pigment dispersion method in terms of color characteristics and quality, the pigment dispersion method is currently used to make color filters. The color filter is prepared by the pigment dispersion method, and the purpose of patterning is mainly achieved through a series of operations such as coating a photoresist on the substrate, exposure, and development, so as to obtain a color filter. [0003] Wh...

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Problems solved by technology

[0007] The defect that prior art exists is, because the kind and usage amount of dispersant or dispersing resin have greater influence on the stability of the pigment dispersion system in colorant, cause the dispersion stability of colorant poor; As the amount increases, the developing performance of the photosensitive resin composition will decrease significantly

When the acrylic copolymer with an ammonia value greater than 0 and an acid value of 0 is added to an alkali-sol

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