Liquid crystal composition, polymer dispersion liquid crystals, display panel and preparation method

A liquid crystal composition and display panel technology, which are applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as inability to present color, and achieve the effects of simple preparation method, wide source and low cost

Active Publication Date: 2016-05-11
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that the existing polymer liquid crystal film can only realize two states of transparency or opaqu

Method used

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  • Liquid crystal composition, polymer dispersion liquid crystals, display panel and preparation method
  • Liquid crystal composition, polymer dispersion liquid crystals, display panel and preparation method
  • Liquid crystal composition, polymer dispersion liquid crystals, display panel and preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a liquid crystal composition, including a twisted grain boundary phase liquid crystal system, a polymerization system, and nanoparticles; the polymerization system includes a first polymerizable monomer and a second polymerizable monomer with different polymerization rates.

[0047] The liquid crystal composition of this embodiment includes a wide temperature twisted grain boundary phase liquid crystal system, at least two polymerizable monomers with different polymerization rates and nanoparticles; since the polymerization rates of different polymerizable monomers are different, the formed Polymer dispersed liquid crystals have a gradient distribution of polymer networks. When the liquid crystal composition is added into a liquid crystal cell and cured for display, under the condition of applied voltage, the liquid crystal droplets in the polymer with gradient distribution in the system will form a pitch gradient distribution, which can present ...

Embodiment 2

[0049] This embodiment provides a liquid crystal composition, including a twisted grain boundary phase liquid crystal system, a polymerization system, and nanoparticles; the polymerization system includes a first polymerizable monomer and a second polymerizable monomer with different polymerization rates.

[0050] That is to say, two monomers with different polymerization rates are selected so that the polymer network formed by the polymerization of the two monomers can be distributed in a gradient. Under certain conditions, it can present a color screen state or a transparent or opaque state.

[0051] Preferably, the polymerization system further includes an initiator.

[0052] That is to say, the initiator corresponding to the monomer is included in the polymerization system, for example, when the polymerizable monomer is ionic polymerized, the initiator for initiating the ionic polymerization should be added correspondingly, and when the polymerizable monomer undergoes radi...

Embodiment 3

[0067] This embodiment provides a polymer dispersed liquid crystal, such as figure 1 As shown, it is formed by the polymerization of the liquid crystal composition of Example 1. The liquid crystal composition includes a twisted grain boundary phase liquid crystal system 1, a polymerization system and nanoparticles 2; the polymerization system includes a first polymerizable monomer with different polymerization rates , the second polymerizable monomer. The first polymerizable monomer and the second polymerizable monomer form a polymer network 3, and due to the different polymerization rates of the first polymerizable monomer and the second polymerizable monomer, the two monomers are self-polymerized or copolymerized to form Gradient distributed polymer network 3; thereby obtaining polymer dispersed liquid crystals.

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Abstract

The invention provides a liquid crystal composition, polymer dispersion liquid crystals, a display panel and a preparation method, belongs to the technical field of display and can solve the problems that an existing polymer liquid crystal membrane can only achieve two states, namely the transparent state or the non-transparent state, and cannot present color. The liquid crystal composition comprises a twisted grain boundary phase liquid crystal system with a wide temperature range, two or more types of polymerizable monomers different in polymerization rate and nano particles; due to the fact that the different polymerizable monomers are different in polymerization rate, the polymer dispersion liquid crystals formed by the polymerizable monomers have polymer networks which are distributed in a gradient mode. When the liquid crystal composition is added to a liquid crystal cell for display, under the condition that voltage is applied, the colored frame state or transparent/non-transparent state can be presented. The display panel is wide in raw material source, low in cost, simple in preparation method and suitable for various display devices.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a liquid crystal composition, a polymer dispersed liquid crystal, a display panel and a preparation method. Background technique [0002] Polymer Dispersed Liquid Crystal (abbreviated as PDLC) is to mix low-molecular liquid crystal (abbreviated as LC) with prepolymer, and undergo polymerization reaction under certain conditions to form micron-sized liquid crystal droplets uniformly dispersed in high In the molecular network, the dielectric anisotropy of liquid crystal molecules is used to obtain materials with electro-optic response characteristics. It mainly works between the scattering state and the transparent state and has a certain gray scale. Polymer liquid crystal film is a film material with excellent comprehensive performance obtained by combining liquid crystal and polymer. Liquid crystal molecules endow polymer liquid crystal films with remarkable electro...

Claims

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Application Information

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IPC IPC(8): C09K19/54G02F1/1334
CPCC09K19/542C09K2019/546G02F1/1334G02F1/13345
Inventor 王菲菲宋平邵喜斌赵合彬张洪林李承珉
Owner BOE TECH GRP CO LTD
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