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Liquid crystal display element

A liquid crystal and component technology, applied in the field of liquid crystal display components, can solve the problem of poor peel strength of reverse PDLC, and achieve the effects of reducing poor peel strength, saving costs, and eliminating environmental pollution

Pending Publication Date: 2022-04-12
青岛诚志光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the present invention also overcomes the problem of pre-coating the alignment film on the substrate in the reverse PDLC device existing in the prior art, saves the cost of the alignment film coating equipment and materials, and eliminates the volatilization of the alignment film solvent The environmental pollution caused reduces the problem of poor reverse PDLC peel strength caused by the alignment film

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0089] The preparation method of the liquid crystal / polymerizable compound mixture is as follows: the liquid crystal, the compound shown in formula I, and other polymerizable compounds except the compound shown in formula I are put into a stainless steel beaker after weighing according to a certain proportion, and the The stainless steel beaker is placed on a magnetic stirring apparatus for heating, stirring and mixing, the mixture is stirred evenly, and the liquid crystal / polymerizable compound mixture is obtained after cooling to room temperature.

[0090] The preparation method of the liquid crystal display element: a conductive layer is formed on the substrate, and the liquid crystal / polymerizable compound mixture is coated on the conductive layer, and spacers exist on the substrate to control the thickness of the liquid crystal layer. The conductive layer of the substrate with the conductive layer formed on the other side is rolled to roll with the substrate coated with th...

Embodiment 1

[0111] Table 6

[0112]

[0113] Introduce the materials in Example 1 into the preparation method of the liquid crystal / polymerizable compound mixture, the preparation method of the liquid crystal display element, and use the characterization method of the liquid crystal display element to characterize the haze. It can be seen that the liquid crystal display device can be realized without using an alignment layer. Under voltage actuation, the transition from transparent state to light scattering state is achieved, which is reverse PDLC.

Embodiment 2

[0115] Table 7

[0116]

[0117]

[0118] Introduce the materials in Example 2 into the preparation method of the liquid crystal / polymerizable compound mixture, the preparation method of the liquid crystal display element, and use the characterization method of the liquid crystal display element to characterize the haze. It can be seen that the liquid crystal display device can be realized without using an alignment layer. Under voltage actuation, the transition from transparent state to light scattering state is achieved, which is reverse PDLC.

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Abstract

The invention discloses a liquid crystal display element which comprises two layers of substrates opposite to each other, two layers of conducting layers located on the inner layers of the substrates and opposite to each other, and a liquid crystal layer located between the conducting layers, and the material of at least one layer of substrate in the two layers of substrates is optically isotropic; the dielectric anisotropy of the liquid crystal layer is positive, the liquid crystal layer comprises a liquid crystal alignment film which is obtained by curing a liquid crystal and a polymerizable compound through polarized light irradiation, the polymerizable compound further comprises one or more of the following compounds selected from a formula I, and the liquid crystal display element is in a transparent state without being powered up and is in a fog state after being powered up.

Description

technical field [0001] The invention relates to the field of liquid crystal application technology. More specifically, it relates to a liquid crystal display element. Background technique [0002] Polymer dispersed liquid crystal (PDLC, polymer dispersed liquid crystal) is currently widely used in smart windows, which can switch between a transparent state and a scattering state. The scattering state can protect privacy and shield outdoor sunlight. At present, there are mainly positive PDLCs on the market, that is, they are transparent when the power is on, and show a scattering state when the power is off. However, the problem with this display mode is that it does not conform to the actual usage habits. Most of the windows need to be transparent, and the transparent positive PDLC needs to consume power in the transparent state; When passing through the positive PDLC, its transparency is reduced, showing a white turbid state, that is, the viewing angle is poor and the vis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334G02F1/1337C08F22/14C08F20/18C09K19/46
Inventor 李正强颜希哲张珂李瑶瑶靳鹏程李元元
Owner 青岛诚志光电科技有限公司