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Prepolymer of polymer dispersed liquid crystal, polymer dispersed liquid crystal composition and display panel

A technology for dispersing liquid crystal and display panels, applied in liquid crystal materials, instruments, optics, etc., can solve the problem of high driving voltage of polymer dispersed liquid crystal film, limited application of polymer dispersed liquid crystal film, poor mechanical strength and anti-radiation performance, etc. problem, to achieve the effect of excellent radiation resistance, high strength and excellent insulation properties

Active Publication Date: 2019-12-06
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the polymer matrix of the currently used polymer-dispersed liquid crystal film is mostly polyacrylate, epoxy resin or mercaptan, there are disadvantages such as high and low temperature resistance, poor chemical stability, poor mechanical strength and radiation resistance. , which limits the application of polymer dispersed liquid crystal films
However, the currently known polymer-dispersed liquid crystal film using polyimide as the polymer matrix has the problem that the driving voltage exceeds 50V.
[0006] Therefore, it is necessary to propose a new material, which can solve the problem of high driving voltage or poor comprehensive performance of the known polymer dispersed liquid crystal film, so as to overcome the above defects

Method used

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  • Prepolymer of polymer dispersed liquid crystal, polymer dispersed liquid crystal composition and display panel
  • Prepolymer of polymer dispersed liquid crystal, polymer dispersed liquid crystal composition and display panel
  • Prepolymer of polymer dispersed liquid crystal, polymer dispersed liquid crystal composition and display panel

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Embodiment 1

[0043] Embodiment 1. Prepolymer of polymer dispersed liquid crystal

[0044] In this embodiment, a polymer-dispersed liquid crystal prepolymer is provided, which can be used to make a polymer-dispersed liquid crystal film. The prepolymer includes fluorine-containing dianhydride monomer, fluorine-containing diamine monomer and polyaniline, and a solvent. Based on the total mass of the prepolymer, the mass fraction of the solvent is 90%, which is N-methylpyrrolidone (NMP) or N-ethylpyrrolidone (NEP).

[0045] The fluorine-containing dianhydride monomer has any one of the structures shown in formulas (i-1) to (i-3):

[0046]

[0047] The fluorine-containing diamine monomer has any one of the structures shown in formulas (ii-1) to (ii-4):

[0048]

[0049] Described polyaniline has the structure shown in formula (iii):

[0050]

[0051] (iii); wherein, n is 3-5.

Embodiment 2

[0052] Embodiment 2. Prepolymer A of polymer dispersed liquid crystal

[0053] In this embodiment, a polymer-dispersed liquid crystal prepolymer A is provided, which can be used to make a polymer-dispersed liquid crystal film. The prepolymer A includes a fluorine-containing dianhydride monomer, a fluorine-containing diamine monomer, polyaniline, and a solvent. Based on the total mass of the prepolymer, the mass fraction of the solvent is 90%, which is N-methylpyrrolidone (NMP) or N-ethylpyrrolidone (NEP).

[0054] The fluorine-containing dianhydride monomer has the structure shown in formula i-1, the fluorine-containing diamine monomer has the structure shown in formula ii-4, the polyaniline has the structure shown in formula iii and n is 4 .

[0055]In the prepolymer described in this embodiment, the molar ratio of the fluorine-containing dianhydride monomer and the fluorine-containing diamine monomer to the polyaniline is 10:9:1.

Embodiment 3

[0056] Embodiment 3. Polymer dispersed liquid crystal composition

[0057] In this embodiment, a polymer-dispersed liquid crystal composition is provided, and the polymer-dispersed liquid crystal composition includes the prepolymer described in Embodiment 1 and liquid crystal molecules. The liquid crystal molecules are commonly used liquid crystal molecules in the field, which will not be repeated here.

[0058] In this embodiment, the polymer monomer has the structures shown in formula (I-1) to formula (I-12), and n is 3-5:

[0059]

[0060]

[0061]

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Abstract

The invention provides a prepolymer of a polymer dispersed liquid crystal, a polymer dispersed liquid crystal composition and a display panel. The polymer dispersed liquid crystal composition comprises a polymer monomer and a liquid crystal molecule, wherein the polymer monomer is a fluorine-containing polyimide monomer having polyaniline bonded by a chemical bond. In the invention, conductive polyaniline is introduced into the fluorine-containing polyimide monomer in a chemical bond manner to improve the conductivity of the polyimide monomer, thereby obtaining a polymer dispersed liquid crystal film which has the driving voltage lower than 30 V and also has excellent insulation performance and radiation resistance.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a polymer-dispersed liquid crystal prepolymer, a polymer-dispersed liquid crystal composition and a display panel. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC) is a structure in which micron-sized liquid crystal droplets are uniformly dispersed in a polymer network by mixing low-molecular liquid crystals with prepolymers and undergoing a polymerization reaction under certain conditions. Due to the dielectric anisotropy of liquid crystal molecules, the polymer dispersed liquid crystal is a material with electro-optic response characteristics. [0003] The polymer-dispersed liquid crystal film made of the polymer-dispersed liquid crystal is a film material with excellent comprehensive performance combining liquid crystal and polymer. Because liquid crystal molecules endow polymer-dispersed liquid crystal films with remarkable electro-optical properties, t...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08J5/18C08L79/08C09K19/54G02F1/1334G02F1/1337G02F1/1343
CPCC08G73/1071C08G73/1039C08G73/1085C08G73/1007C08J5/18C09K19/544G02F1/1334G02F1/133723G02F1/1343C08J2379/08C08G73/1067C08G73/1042C08L2203/16C08G73/1032
Inventor 兰松
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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