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Liquid crystal display element and liquid crystal composition

A technology of liquid crystal display elements and liquid crystal compositions, applied in liquid crystal materials, optics, instruments, etc., to achieve the effect of reducing manufacturing costs

Active Publication Date: 2019-10-25
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is no hint or description that a specific polymerizable compound can control the horizontal alignment of a liquid crystal compound by irradiation with polarized light.

Method used

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  • Liquid crystal display element and liquid crystal composition
  • Liquid crystal display element and liquid crystal composition
  • Liquid crystal display element and liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0627] Compound (A-1-1-1) was added in a ratio of 0.5 parts by weight to 100 parts by weight of composition (M1), and compound (5) of t=7 was added as an antioxidant in a ratio of 150 ppm. The mixture was injected into an IPS element having no alignment film at 90° C. (above the upper limit temperature of the nematic phase).

[0628] While heating the IPS element at 90°C (above the upper limit temperature), irradiate the element with linearly polarized ultraviolet rays (313nm, 2.0J / cm 2), so as to obtain an element formed with an orientation control layer. The irradiated ultraviolet light becomes linearly polarized light by passing through the polarizer. Next, the device in which the orientation control layer was formed was placed on a polarizing microscope, and the orientation state of the liquid crystal was observed. The polarizer and the analyzer of the polarizing microscope are arranged such that their respective transmission axes are perpendicular to each other. First,...

Embodiment 2～ Embodiment 26

[0630] As shown in the following Table 4, compositions (M1) to (M20) were used, and additives were mixed as shown in the following table. The temperature at the time of irradiating linearly polarized ultraviolet rays was set as shown in the following table. The presence or absence of light leakage was observed by the same method as in Example 1. As a result, no light leakage was observed, so the orientation was good. In addition, the following compound (RM-1) - compound (RM-3) were used as a 2nd additive.

[0631]

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Abstract

The purpose of the invention is to control, by using a colorless alignment control monomer, the alignment of liquid crystal molecules of a liquid crystal display element that does not include an alignment film, and to provide a liquid crystal composition with which the colorless alignment control monomer exhibits excellent compatibility. The invention uses a liquid crystal display element that comprises an alignment control monomer including an aromatic ester that undergoes photo-Fries rearrangement by light irradiation, and that employs a liquid crystal composition having a positive dielectric anisotropy. The invention also uses the liquid crystal composition.

Description

technical field [0001] The invention relates to a liquid crystal display element and a liquid crystal composition containing a liquid crystal composition with positive dielectric anisotropy. In particular, it relates to a liquid crystal display device utilizing a liquid crystal composition containing an alignment control monomer having an aromatic ester that undergoes photo Fries rearrangement by light irradiation, and through the The effect of compound can achieve the alignment of liquid crystal molecules without using alignment film such as polyimide. Background technique [0002] In liquid crystal display elements, the classification based on the operation mode of liquid crystal molecules is phase change (phase change, PC), twisted nematic (twisted nematic, TN), super twisted nematic (super twisted nematic, STN), electronically controlled birefringence ( Electrically controlled birefringence (ECB), optically compensated bend (OCB), in-plane switching (IPS), vertical alig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08F20/30C09K19/46G02F1/13G02F1/139
CPCC08F20/30C09K19/0208C09K19/0216C09K19/3001C09K19/3066C09K19/3068C09K19/3402C09K19/542C09K19/56C09K2019/0466C09K2019/3071C09K2019/3078C09K2019/3083C09K2019/3422C09K2019/548C09K2019/301C09K2019/3077C09K2019/3019C09K2019/0448C09K19/322C09K2019/122C09K19/32G02F1/13725G02F1/13706G02F1/13712G02F1/13775G02F1/133788G02F1/1339G02F1/1362C09K2323/00C09K2323/02
Inventor 平井吉治荻田和寛近藤史尚矢野智広远藤浩史
Owner JNC CORP
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