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Liquid-crystal display element, liquid-crystal alignment agent, and liquid-crystal alignment film

A technology of liquid crystal alignment film and liquid crystal alignment, which is applied in the direction of instruments, optics, nonlinear optics, etc., and can solve the problem of increased power consumption

Active Publication Date: 2016-05-18
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the standard type element needs to constantly apply a voltage in order to obtain a transmissive state, so it consumes a lot of power when it is used in a transparent state, such as window glass

Method used

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  • Liquid-crystal display element, liquid-crystal alignment agent, and liquid-crystal alignment film
  • Liquid-crystal display element, liquid-crystal alignment agent, and liquid-crystal alignment film
  • Liquid-crystal display element, liquid-crystal alignment agent, and liquid-crystal alignment film

Examples

Experimental program
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Effect test

Embodiment

[0328] Examples are listed below to further describe the present invention in detail, but they are not limitedly interpreted. In addition, the abbreviations of the compounds used in the synthesis example, the Example, and the comparative example are as follows.

[0329] (liquid crystal) L1: MLC-6608 (manufactured by MERCK CORPORATION)

[0330] (polymerizable compound) R1: a compound represented by the following formula [R1]

[0331] (Photoinitiator) P1: a compound represented by the following formula [P1]

[0332]

[0333] (specific cellulosic polymer)

[0334] CE-1: Hydroxyethylcellulose (manufactured by Wako Pure Chemical Industries, Ltd.)

[0335] CE-2: Hydroxypropylmethylcellulose phthalate (manufactured by ACROS)

[0336] (specific side chain type diamine compound)

[0337] A1: 1,3-diamino-4-[4-(trans-4-n-heptylcyclohexyl)phenoxy]benzene (the following formula [A1])

[0338] A2: 1,3-diamino-4-[4-(trans-4-n-heptylcyclohexyl)phenoxymethyl]benzene (the following for...

Synthetic example 1

[0391] Mix D1 (3.32g, 16.9mmol), A1 (3.26g, 8.57mmol), B1 (1.04g, 6.84mmol) and C2 (0.19g, 1.76mmol) in NEP (23.4g) and react at 40°C for 8 hours , A polyamic acid solution (1) having a resin solid content concentration of 25% by mass was obtained. The number average molecular weight of this polyamic acid was 23,200, and the weight average molecular weight was 70,100.

Synthetic example 2

[0393] Mix D2 (4.29g, 17.1mmol), A2 (6.76g, 17.1mmol) and B1 (2.61g, 17.1mmol) in NMP (33.9g), react at 50°C for 2 hours, add D1 (3.29g, 16.8 mmol) and NMP (17.0 g) were reacted at 40° C. for 6 hours to obtain a polyamic acid solution (2) whose resin solid content concentration was 25% by mass. The number average molecular weight of this polyamic acid was 23,800, and the weight average molecular weight was 69,500.

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Abstract

A liquid-crystal display element obtained by disposing a liquid-crystal composition comprising a liquid crystal and a polymerizable compound that polymerizes by the action of actinic energy rays or heat, between two substrates equipped with electrodes, at least one of the substrates having a liquid-crystal alignment film, and curing the liquid-crystal composition in the state of being liquid-crystalline either partly or wholly, to thereby form a composite of the liquid crystal with a cured object obtained from the polymerizable compound, wherein the liquid-crystal alignment film is formed from a liquid-crystal alignment agent containing the following ingredients (A) and (B). Ingredient (A): a cellulosic polymer having a specific structure. Ingredient (B): at least one polyimide-based polymer selected from the group consisting of polyimide precursors and polyimides all having a specific side chain.

Description

technical field [0001] The present invention relates to a transmissive-scattering liquid crystal display element that exhibits a transparent state when no voltage is applied and a scattering state when a voltage is applied, a liquid crystal alignment treatment agent for the element, and a liquid crystal alignment film. Background technique [0002] As a liquid crystal display element using a liquid crystal material, a TN (twisted nematic, Twisted Nematic) mode is actually used. This mode uses the optical rotation characteristics of liquid crystals to convert light, and polarizers are required when used as liquid crystal display elements. However, it is known that light utilization efficiency becomes low due to the use of polarizers. [0003] As a liquid crystal display element that has high light utilization efficiency and does not use a polarizer, there is a liquid crystal display element that switches between a transmissive state (also called a transparent state) and a sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08L1/02C08L79/08G02F1/1334
CPCC08L1/284C08L1/32C08L79/08G02F1/133723G02F1/133726
Inventor 三木徳俊片山雅章巴幸司国见奈穂保坂和義
Owner NISSAN CHEM IND LTD
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