Liquid crystal display panel and preparation method thereof

Abstract

The invention relates to a liquid crystal display panel and a preparation method thereof. The liquid crystal display panel comprises a first substrate and a second substrate, wherein a plurality of spacers are formed between the first substrate and the second substrate; the spacers at least comprise a first spacer and a second spacer; the thermal expansion coefficient of the material adopted by the first spacer is less than the thermal expansion coefficient of liquid crystal; the thermal expansion coefficient of the material adopted by the second spacer is greater than the thermal expansion coefficient of the liquid crystal; and the first spacer and the second spacer are arranged in a spacing mode. The preparation method comprises the following steps: respectively preparing and forming the first spacer and the second spacer on one or two substrates, and folding the two substrates to form the liquid crystal display panel. In the invention, by the combined actions of the spacers of different materials, the integral thermal expansion coefficient of the spacers is approximate to the thermal expansion coefficient of the liquid crystal, thereby enhancing the capacity of the spacers in keeping the box thickness, reducing the adverse phenomena of high-temperature gravity water ripple and low-temperature air bubbles appearing on the liquid crystal display panel, and improving the display effect.

Description

technical field [0001] The invention relates to liquid crystal display structure technology, in particular to a liquid crystal display panel and a preparation method thereof. Background technique [0002] The liquid crystal display panel includes a first substrate and a second substrate, and is formed by injecting liquid crystal between the two substrates. The two substrates of a common liquid crystal display panel are an array substrate and a color filter substrate. In the manufacturing process of the liquid crystal display panel, the thickness of the liquid crystal layer is a very important control factor, and the thickness of the liquid crystal layer can be controlled by controlling the distance between the two substrates, that is, the cell thickness (Cell Gap). [0003] In order to keep the thickness of the cell between the first substrate and the second substrate consistent at each position in the plane of the entire liquid crystal display panel, the prior art mainly a...

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Problems solved by technology

[0004] However, in the process of carrying out the research of the present invention, the inventors found that existing liquid crystal display panels that maintain cell thickness by setting PS have certain defects: the liquid crystal display panel manufactured at room temperature, when in a high temperature environment, the volume of liquid crystal It will increase due to thermal expansion. The liquid crystal display panel is placed vertically when it is used, so the liquid crystal display panel will have the undesirable phenomenon of gravitational water ripples (mura); when it is in a low temperature environment, the volume of the liquid crystal will decrease due to shrinkage. There is a gap between them, so the liquid crystal display panel will have a bad phenomenon of low-temperature bubbles (bubble)

PS is generally made of polymethyl methacrylate (Polymethyl Methacrylate; hereinafter referred to as: PMMA) or polycarbonate (hereinafter referred to as: PC) and other resins, because the material of PS is difficult to match the coefficient of thermal expansion of liquid crystal (Coefficient of Thermal Expansion ; hereinafter referred to as: CTE) remains consistent, so the above-mentioned high-temperature gravity water ripples and low-temperature air bubbles are unavoidable, which seriously affects the display quality of the LCD panel

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