Cholesteric liquid crystal handwriting board and preparation method thereof

A technology of cholesteric liquid crystal and handwriting tablet, which is applied in optics, instruments, electrical digital data processing, etc., and can solve problems such as poor adhesion, natural phase separation that does not achieve the best effect, and unsatisfactory brightness.

Inactive Publication Date: 2020-08-04
SHENZHEN POLICRAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the method of controlling the thickness of the liquid crystal layer can only be adjusted by using spacers, but the diameter of the spacers is generally about a few microns, which is a kind of extremely small particles. If you want to change the thickness of the liquid crystal layer, you can only change a k

Method used

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  • Cholesteric liquid crystal handwriting board and preparation method thereof
  • Cholesteric liquid crystal handwriting board and preparation method thereof
  • Cholesteric liquid crystal handwriting board and preparation method thereof

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preparation example Construction

[0047] In the present invention, the preparation method of the liquid crystal layer feed solution preferably includes the following steps:

[0048] The polymerized monomer, photoinitiator, chiral agent, spacer and liquid crystal are mixed, then heated to above the clearing point, and stirred for 2 hours in the dark to obtain the liquid crystal layer feed solution.

[0049] image 3 Schematic diagram of the structure of the cholesteric liquid crystal tablet provided by the present invention.

[0050] The present invention also provides the preparation method of the cholesteric liquid crystal tablet described in the above technical scheme, comprising the following steps:

[0051] Adhering the first ITO conductive layer and the first polymer layer in sequence on the first substrate, and attaching the second ITO conductive layer and the second polymer layer in sequence on the second substrate to obtain two splints;

[0052] The liquid crystal layer material is dropped on one end...

Embodiment 1

[0062] A preparation method for a cholesteric liquid crystal tablet, comprising the following steps:

[0063] The first ITO conductive layer (thickness is 100nm) is attached on the first substrate (material is PET) with a thickness of 50 μm, then the polyamic acid aqueous solution is dropped on the first ITO conductive layer, spin coating (rotating speed 3500r / min, time 30s) after heating at 220° C. for 10 minutes, attach a first polymer layer (polyimide) with a thickness of 1 μm on the first ITO conductive layer to obtain a splint, and obtain another splint according to the same method;

[0064] 5 parts by weight of RM257 monomer, 1.2 parts by weight of photoinitiator BME, 0.8 parts by weight of chiral agent R6N, 2 parts by weight of PS (with a particle diameter of 5 μm) and 100 parts by weight of liquid crystal E7 were mixed, then heated to above the clearing point, and Stir in the dark for 2 hours, drop the obtained liquid crystal layer material on one end of the two splint...

Embodiment 2

[0066] A preparation method for a cholesteric liquid crystal tablet, comprising the following steps:

[0067] A first ITO conductive layer (thickness 100 nm) was attached on a first substrate (material: PET) with a thickness of 50 μm.

[0068] 10 parts by weight of RM257 monomer, 1.2 parts by weight of photoinitiator BME, 0.8 parts by weight of chiral agent R6N, 2 parts by weight of PS (with a particle diameter of 5 μm) and 100 parts by weight of liquid crystal E7 were mixed, then heated to above the clearing point, and Stir in the dark for 2 hours, drop the obtained liquid crystal layer on one end of the two splints, squeeze it from one end of the splint to the other end with a roller, repeat extrusion 3 times, heat to 100°C and then ultraviolet light (intensity 2mW / cm 2 ) to polymerize for 20min to obtain a polymer layer (an olefin polymer whose side group is an ester group), then stop the light, cool naturally to room temperature, and then use ultraviolet light (intensity...

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Abstract

The invention provides a cholesteric liquid crystal handwriting board and a preparation method thereof, and belongs to the technical field of liquid crystal materials. The invention provides a cholesteric liquid crystal handwriting board. The cholesteric liquid crystal handwriting board comprises a first substrate, a first ITO conducting layer, a first polymer layer, a liquid crystal layer, a second polymer layer, a second ITO conducting layer and a second substrate which are sequentially arranged in a stacked mode. According to the handwriting board, the polymer layer is attached to the conducting layer, the thickness of the liquid crystal layer can be finely adjusted due to the existence of the polymer layer, and the thickness of the liquid crystal layer can be reduced as much as possible while handwriting brightness is not affected, so that driving voltage is reduced, and the service life of the handwriting board is prolonged. Meanwhile, due to the existence of the polymer layer, the adhesion between the substrate and the liquid crystal layer is improved, and the integrity of the handwriting board is improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials, in particular to a cholesteric liquid crystal tablet and a preparation method thereof. Background technique [0002] At present, the cholesteric liquid crystal tablet is mainly composed of a substrate, an ITO (indium tin oxide) conductive layer, and a liquid crystal layer. The ITO layer is very thin for turning on the power supply, the first and second ITO layers are turned on to form a capacitor, which can form an electric field in the liquid crystal layer, figure 1 It is a schematic structural diagram of a cholesteric liquid crystal tablet in the prior art, including a first substrate, a first ITO conductive layer, a liquid crystal layer, a second ITO conductive layer, and a second substrate. [0003] The material liquid layer of the liquid crystal layer is a polymer-stabilized cholesteric liquid crystal layer, which is obtained by dissolving the polymerized monomer, initiator...

Claims

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Application Information

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IPC IPC(8): G06F3/0354G02F1/1333G02F1/1334G02F1/137
CPCG02F1/13338G02F1/1334G02F1/13718G06F3/03547
Inventor 夏亮陆红波吴飞沈隆军
Owner SHENZHEN POLICRAL TECH CO LTD
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