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Liquid crystal alignment agent, liquid crystal alignment film, making method of film, panel including film, and device including film

A technology of liquid crystal alignment agent and liquid crystal alignment film, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of reduced screen contrast, high contrast, and weak afterimage, so as to reduce the amount of Dose, improve alignment, and improve The effect of contrast and afterimage

Active Publication Date: 2017-03-29
XIAMEN TIANMA MICRO ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The afterimage problem has always affected the picture quality of TFT-LCD. How to improve the afterimage has always been a problem that this field tries to solve. However, while improving the afterimage, the contrast of the picture will decrease, and it is impossible to obtain the effect of high contrast and weak afterimage at the same time.

Method used

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  • Liquid crystal alignment agent, liquid crystal alignment film, making method of film, panel including film, and device including film
  • Liquid crystal alignment agent, liquid crystal alignment film, making method of film, panel including film, and device including film
  • Liquid crystal alignment agent, liquid crystal alignment film, making method of film, panel including film, and device including film

Examples

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preparation example Construction

[0100] In one embodiment, the present invention also provides a method for preparing the aforementioned liquid crystal alignment film, the preparation method comprising the following steps:

[0101] (a) coating the aforementioned liquid crystal aligning agent on the substrate to form a coating film;

[0102] (b) pre-baking the substrate formed with the coating film;

[0103] (c) aligning the film layer obtained in step (b) by light, and then post-baking to form a liquid crystal alignment film.

[0104] In a preferred embodiment, the thickness of the coating film in step (a) is 80nm-120nm, such as 90nm, 100nm, 110nm and so on.

[0105] In a preferred embodiment, the baking temperature in the pre-baking stage of step (b) is 70-150°C, such as 90°C, 110°C, 130°C, etc., and the baking time is 120s.

[0106] In a preferred specific embodiment, the wavelength range of the light alignment in step (c) is 254-323 nm, and the light alignment dose is 500-2000 mJ, such as 1000 mJ, 1500 m...

Embodiment 1

[0113] A liquid crystal aligning agent comprises the following components in parts by weight:

[0114] (i) have structure of polyamic acid, where n 1 The average value is 10.0, and the addition amount is 3 parts by weight;

[0115] (ii) have structure of polyamic acid, where n 2 The average value is 9.3, and the addition amount is 1 part by weight; wherein the polypyrrole group is a rigid group, which belongs to a hard polymer group with a high cyclization rate, and can promote the stacking of the polymer in the obtained PI film;

[0116] (iii) have structure of polyamic acid, where n 2 The average value is 7.5, and the addition amount is 1 part by weight; an isomeric photoreactive group is connected to it, which can be sensitive to a wavelength near 313nm;

[0117] (iv) have structure of polyamic acid, where n 2 The average value is 8.0, and the addition amount is 1 part by weight; a decomposing photoreactive group is connected to it, which can be sensitive to a w...

Embodiment 2

[0125] The difference from Example 1 is that the light alignment dose in step (c) is 500mJ.

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Abstract

The invention relates to a liquid crystal alignment agent, a liquid crystal alignment film, a making method of the film, a panel including the film, and a device including the film. The above compound has multi-waveband ultraviolet photosensitivity, is sensitive to two wavebands, reduces the Dose amount of illumination, and can complete orientation only by 500-1000 mJ, so energy is saved, and the productivity is improved; and addition of a rigid group to the compound increases the orientation of AC voltage and improves the contrast and the afterimage.

Description

technical field [0001] The invention belongs to the field of liquid crystal display, and in particular relates to a liquid crystal alignment agent, a liquid crystal alignment film, a liquid crystal element, and a manufacturing method thereof. Background technique [0002] The display of the liquid crystal display device is performed by applying an electric field to the liquid crystal molecules of the liquid crystal layer sandwiched between a pair of substrates to change the alignment direction of the liquid crystal molecules, and utilizing the changes in the optical properties of the liquid crystal layer due to the changes. In TFT-LCD (Thin Film Transistor Liquid Crystal Display), the alignment film coated on the CF substrate and the TFT substrate plays a role in controlling the alignment direction of liquid crystal molecules. The alignment technology of the liquid crystal alignment film can realize that the liquid crystal molecules on the entire substrate surface are neatly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56C08G73/10C08J5/18G02F1/1337C08L79/08
CPCG02F1/133711G02F1/133788C09K19/56C08G73/1085C08G73/1096C08J5/18C08J2379/08
Inventor 宋琼沟口亲明
Owner XIAMEN TIANMA MICRO ELECTRONICS
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