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Alignment film material, alignment film and preparation method of alignment film, and liquid display device

A technology of alignment film and alignment layer, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of large investment and high equipment cost, and achieve the effect of good orientation uniformity, small investment, and increased uniformity

Inactive Publication Date: 2014-09-17
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of ultraviolet light equipment is large, and the investment is large.

Method used

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  • Alignment film material, alignment film and preparation method of alignment film, and liquid display device
  • Alignment film material, alignment film and preparation method of alignment film, and liquid display device
  • Alignment film material, alignment film and preparation method of alignment film, and liquid display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] An embodiment of the present invention provides a method for manufacturing an alignment film material, such as figure 1 As shown, the method includes:

[0082] Step 101, carry out surface modification treatment on the silica nanoparticles, to eliminate or reduce the number of hydroxyl groups on the surface of the silica nanoparticles, and graft the terminal with amino groups (-NH 2 ) linear chain to obtain surface-modified silica nanoparticles;

[0083] Step 102, disperse the surface-modified silica nanoparticles into the polyimide solution to prepare a mixed solution containing surface-modified silica nanoparticles and polyimide, wherein the surface-modified two The mass percentage of the silicon oxide nanoparticles relative to the polyimide is 0.01wt%-0.2wt%.

[0084] The particle size of silica nanoparticles is small, the specific surface area is large, and the surface contains hydroxyl groups, which are easy to agglomerate to form aggregate particles. In step 101...

Embodiment 2

[0120] Corresponding to the manufacturing method in Example 1, this embodiment of the present invention provides an alignment film material, which is a mixed solution containing surface-modified silica nanoparticles and polyimide, wherein the surface The mass percentage of the modified silica nanoparticles relative to the polyimide is 0.01wt% to 0.2wt%;

[0121] Wherein, the surface-modified silica nanoparticles are obtained after silica nanoparticles undergo surface modification treatment, which eliminates or reduces the number of hydroxyl groups on the surface of the silica nanoparticles, and the surface modification The silica nanoparticles are anchored on the surface with terminal amino groups (-NH 2 ) linear chain.

[0122] Optionally, the alignment film material may also include a certain amount of non-aqueous organic solvent.

[0123] Using the alignment film material described in this embodiment, a vertically aligned alignment film can be prepared without the use of ...

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Abstract

The invention discloses an alignment film material, an alignment film and a preparation method of the alignment film, and a liquid display device and relates to the field of a liquid crystal display. The alignment film with a vertical orientation can be prepared without use of an illumination device, so that cost of investment is reduced. The alignment film provided by the invention is a mixed solution containing a surface modified silica nanoparticles and polyimide, wherein the surface modified silica nanoparticles are 0.01 to 0.2 wt% in comparison with mass percentage of polyimide; and the surface modified silica nanoparticles are obtained by performing surface modification for the silica nanoparticles, so that quantity of the hydroxide radicals on surfaces of the silica nanoparticles are eliminated or reduced, and the surfaces of the silica nanoparticles are anchored with linear chains with amino groups at terminals on the surfaces of the silica nanoparticles after being carried out surface modification. The alignment film is prepared by coating the alignment film material on a base plate.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to an alignment film material, an alignment film and a manufacturing method thereof, and a liquid crystal display device. Background technique [0002] In recent years, liquid crystal displays in vertical display mode have attracted widespread attention due to their advantages such as wide viewing angle, short response time, and high contrast. In the liquid crystal display of this display mode, the alignment film is perpendicular to the display screen, so in the state of no voltage applied, the induction or restriction of the vertical alignment film will make the liquid crystal molecules align vertically to the display screen, here for "vertical The understanding of "means that in the state of no voltage applied, the alignment film induces or restricts liquid crystal molecules, so that the angle (pretilt angle) formed by the long axis direction of the liquid crystal molecules a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K9/04C08K9/06C08K3/36C08J5/18C09K19/56G02F1/1337
Inventor 唐广涛
Owner BOE TECH GRP CO LTD
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