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Liquid crystal composition for optical switching element, mixture, polymer/liquid crystal composite material, element and lidar

A liquid crystal composition and light conversion technology, applied in liquid crystal materials, optics, nonlinear optics, etc., can solve the problems of limited control times and long response time

Inactive Publication Date: 2019-12-17
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In an element using a liquid crystal medium for polarization control, a nematic liquid crystal medium is used and the response time is long, so there is a problem that the number of times of control per fixed time is limited.

Method used

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  • Liquid crystal composition for optical switching element, mixture, polymer/liquid crystal composite material, element and lidar
  • Liquid crystal composition for optical switching element, mixture, polymer/liquid crystal composite material, element and lidar
  • Liquid crystal composition for optical switching element, mixture, polymer/liquid crystal composite material, element and lidar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0466] A nematic liquid crystal composition NLC-A was prepared by mixing the liquid crystal compounds shown in the figure below in the following ratios.

[0467] Nematic liquid crystal composition NLC-A

[0468]

[0469]

[0470] The phase transition temperature (° C.) of the nematic liquid crystal composition NLC-A is N 87.8I.

[0471] Next, a chiral nematic liquid crystal composition CLC-A1 comprising a nematic liquid crystal composition NLC-A (95.2% by weight) and a chiral agent (8H) BN-H5 (4.8% by weight) was obtained.

[0472] The phase transition temperature (℃) of the chiral nematic liquid crystal composition CLC-A1 is N * 79.0BP-I.

[0473] Preparation of the mixture (MLC-A1) of polymerizable monomer and chiral nematic liquid crystal composition

[0474] As a mixture of chiral nematic liquid crystal composition and polymerizable monomer, 88.8% by weight of chiral nematic liquid crystal composition CLC-A1, 6.0% by weight of n-hexadecyl acrylate, and 4.8% by weigh...

Embodiment 2

[0481] A chiral nematic liquid crystal composition CLC-A2 comprising the nematic liquid crystal composition NLC-A (96.5% by weight) and the chiral agent (8H) BN-H5 (3.5% by weight) was obtained.

[0482] The phase transition temperature (℃) of the chiral nematic liquid crystal composition CLC-A2 is N * 79.8 BP-I.

[0483] Preparation of the mixture (MLC-A2) of polymerizable monomer and chiral nematic liquid crystal composition

[0484] As a mixture of chiral nematic liquid crystal composition and polymerizable monomer, 88.8% by weight of chiral nematic liquid crystal composition CLC-A2, 6.0% by weight of n-hexadecyl acrylate, and 4.8% by weight of benzene-1 , 2,4-triyltris(4-(12-(acryloyloxy)dodecyloxy)benzoyloxy)benzoate (LCA-1), 0.4% by weight as photopolymerized Initiator 2,2'- dimethoxyphenyl acetophenone mixed mixture MLC-A2. The phase transition temperature (℃) of the mixture MLC-A2 is N * 52.5BP-I.

[0485] Preparation of polymer / liquid crystal composite material (...

Embodiment 3

[0489] A nematic liquid crystal composition NLC-B was prepared by mixing the liquid crystal compounds shown in the figure below in the following ratios.

[0490] Nematic liquid crystal composition NLC-B

[0491]

[0492]

[0493] The phase transition temperature (° C.) of the nematic liquid crystal composition NLC-B is N 97.1I.

[0494] Next, a chiral nematic liquid crystal composition CLC-B comprising a nematic liquid crystal composition NLC-B (96.5% by weight) and a chiral agent (8H) BN-H5 (3.5% by weight) was obtained.

[0495] The phase transition temperature (℃) of the chiral nematic liquid crystal composition CLC-B is N * 90.4BP-I.

[0496] Preparation of the mixture (MLC-B) of polymerizable monomer and chiral nematic liquid crystal composition

[0497] As a mixture of chiral nematic liquid crystal composition and polymerizable monomer, 88.8% by weight of chiral nematic liquid crystal composition CLC-B, 6.0% by weight of n-dodecyl acrylate, and 4.8% by weight of...

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Abstract

Since a switching element using a nematic liquid crystal medium has a long response time, there is a limit to the number of control instances over a certain time. By using a liquid crystal compositionexhibiting an optical isotropic phase, an element capable of performing polarization control at high speed is provided. A mixture comprising the liquid crystal composition and polymerizable monomers,a polymer / liquid crystal composite material obtained by polymerizing the mixture, an element comprising the liquid crystal composition or the polymer / liquid crystal composite, and a LIDAR comprisingthe element are provided.

Description

technical field [0001] The present invention relates to a liquid crystal medium exhibiting an optically isotropic liquid crystal phase (liquid crystal composition, Polymer / liquid crystal composite materials, etc.), mixtures of polymerizable monomers, etc., and liquid crystal compositions, and devices using them. Background technique [0002] The optical conversion element is an element that performs switching or on / off of an optical path, and there are mechanical, electronic, and all-optical types in the form. The mechanical type is a method of mechanically moving a prism, a mirror, or an optical fiber, and the electronic type includes a type that uses electro-optical effects, magneto-optic effects, thermo-optic effects, or semiconductor gates. The plenoptic type uses a non-linear refractive index change and uses a liquid crystal medium exhibiting an isotropic liquid crystal phase, which corresponds to the plenoptic type. The light conversion element is preferably capable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C08F220/68C08F222/20C08F2/48C08F2/44G01S7/481
CPCC09K19/44C08F220/68C08F2/48C08F2/44G01S7/481G02F1/29G01S7/4817G01S7/499C09K2019/0448C09K2019/0466C09K2019/3422C09K2019/3009C09K2019/3016C09K19/586C09K19/42C09K19/3402C09K19/32C09K19/20C09K19/542G02F1/13G02F2203/24
Inventor 山本真一冈部英二
Owner JNC CORP
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