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Magnetic-control liquid crystal material, preparation method of liquid crystal display device and display device

A liquid crystal material and liquid crystal display technology, applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of complicated process, long post-processing time, and increased manufacturing cost of magnetically controlled liquid crystal materials, so as to reduce manufacturing costs and shorten The effect of postprocessing time

Inactive Publication Date: 2012-08-29
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above process of preparing the magnetron liquid crystal material, the inventors found that the prior art has the following problems: In order to make the Fe 3 o 4 Magnetic nanoparticles can induce chiral compounds to move together when they are subjected to a magnetic field. 3 o 4 The above-mentioned chiral modification step must be carried out before the magnetic nanoparticles are added to the cholesteric liquid crystal. This step specifically includes esterification reaction, addition of catalyst, subsequent purification treatment (recrystallization, injection chromatography) and other process steps. The process is complicated and the material post-treatment The time is long, thus increasing the manufacturing cost of the magnetron liquid crystal material

Method used

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  • Magnetic-control liquid crystal material, preparation method of liquid crystal display device and display device
  • Magnetic-control liquid crystal material, preparation method of liquid crystal display device and display device
  • Magnetic-control liquid crystal material, preparation method of liquid crystal display device and display device

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preparation example Construction

[0020] An embodiment of the present invention provides a method for preparing a magnetron liquid crystal material, comprising: preparing Fe 3 o 4 Magnetic nanoparticles; adding a chiral compound in the nematic liquid crystal to form a cholesteric liquid crystal, the chiral compound can be combined with the Fe 3 o 4 The magnetic nanoparticles are bonded; the Fe 3 o 4 Magnetic nanoparticles are added into the cholesteric liquid crystal to form the magnetron liquid crystal material.

[0021] An embodiment of the present invention also provides a method for preparing a liquid crystal display device, comprising: preparing an upper substrate with a first alignment layer; preparing a lower substrate with a second alignment layer; and aligning the first alignment layer of the upper substrate to The second alignment layer of the lower substrate, and combining the upper substrate and the lower substrate to form a plane-oriented liquid crystal cell; filling the magnetron liquid cryst...

Embodiment 1

[0026] Embodiments of the present invention provide a method for preparing a magnetron liquid crystal material, such as figure 1 As shown, the method includes the following steps.

[0027] 101. Preparation of Fe 3 o 4 magnetic nanoparticles.

[0028] Specifically, Fe 3 o 4 Magnetic nanoparticles can be prepared by chemical co-deposition method, microemulsion method or other methods known to those skilled in the art.

[0029] 102. Adding a chiral compound to the nematic liquid crystal to form a cholesteric liquid crystal, the chiral compound can be combined with the Fe 3 o 4 The magnetic nanoparticles are bonded.

[0030] 103, the Fe 3 o 4 Magnetic nanoparticles are added into the cholesteric liquid crystal to form the magnetron liquid crystal material.

[0031] Specifically, compared with the prior art, in this embodiment, when the cholesteric liquid crystal is formed, the nematic liquid crystal is added with Fe 3 o 4 Magnetic nanoparticles bond with chiral compounds...

Embodiment 2

[0038] This embodiment provides a method for preparing a liquid crystal display device. The initial reflected light color of the liquid crystal display device is green, and the liquid crystal display device has the magnetron liquid crystal material described in embodiment 1.

[0039] Step 1. Prepare a liquid crystal cell. This step includes: using 3% polyvinyl alcohol aqueous solution, coating one side of the glass substrate by the method of spin coating, baking at 80 ℃ for 30 minutes, and then rubbing and aligning in one direction with flannelette to form an orientation layer; After the glass substrates were aligned along the orientation direction, they were bonded with a polyethylene gasket with a thickness of 100 μm to form a plane-oriented liquid crystal cell.

[0040] Step 2, prepare Fe by chemical co-deposition 3 o 4 magnetic nanoparticles. This step includes: 10mL of 0.2mol / L FeCl 3 (ferric chloride) solution was slowly added to 10mL of 0.15mol / L FeCl 2 4H 2 O (fe...

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Abstract

The invention discloses a magnetic-control liquid crystal material, a preparation method of a liquid crystal display device and a display device, which relate to the technical field of the liquid crystal display, and solve the problem of the existing preparation method of the magnetic-control liquid crystal material that the manufacturing cost of the magnetic-control liquid crystal material is increased due to complicated process and long post-treatment time of the material. According to the embodiment of the invention, in the process that cholesteric liquid crystal is formed, a chiral compound which can have bonding action with ferroferric oxide (Fe3O4) magnetic nano particles is added into nematic phase liquid crystal, so that the Fe3O4 magnetic nano particles are bonded with the chiral compound to form a chemical bond. Therefore, a step for chirally modifying the Fe3O4 magnetic nano particles in the prior art can be omitted, the post-treatment time of the material can be shortened, so that the manufacturing cost of the magnetic-control liquid crystal material can be reduced. The embodiment of the invention is mainly used for a liquid crystal display device.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a magnetron liquid crystal material, a preparation method of a liquid crystal display device and a display device. Background technique [0002] With the need for energy saving and environmental protection, people have shown great interest in using liquid crystal materials to develop electronic paper products. Since electronic paper can be as light, thin, soft and foldable as ordinary paper, and can be repeatedly erased and written, once electronic paper is widely used, it can save a lot of natural resources used to prepare ordinary paper, reduce the cost of papermaking and printing pollution of the environment. [0003] In terms of using liquid crystal materials to develop electronic paper, Kent State University in the United States has developed electronic paper with electric addressing and electric erasing characteristics by using dual-frequency drive liquid cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/36C09K19/54G02F1/1333G02F1/137
Inventor 胡望
Owner BOE TECH GRP CO LTD
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