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Nematic liquid crystal composition, and liquid crystal display element using same

A liquid crystal composition and compound technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as poor display and reduced response speed, and achieve the effect of excellent display quality and high-speed response of display quality

Active Publication Date: 2018-11-09
DAINIPPON INK & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, a liquid crystal composition containing a liquid crystal material having an alkenyl group effective for lowering the viscosity is effective for reducing the response speed, but after polymerization of a polymerizable compound in the production process of a PSA display element, display may sometimes occur. Bad and other problems

Method used

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  • Nematic liquid crystal composition, and liquid crystal display element using same
  • Nematic liquid crystal composition, and liquid crystal display element using same
  • Nematic liquid crystal composition, and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0247] Hereinafter, examples are given and the present invention will be described in further detail, but the present invention is not limited to these examples. In addition, "%" in the composition of a following Example and a comparative example means "mass %".

[0248] The following abbreviations are used for descriptions of compounds in Examples.

[0249] (side chain)

[0250] -n -C n h 2n+1 straight-chain alkyl group with carbon number n

[0251] n-C n h 2n+1 - Straight-chain alkyl group with carbon number n

[0252] -On -OC n h 2n+1 straight-chain alkoxyl with carbon number n

[0253] nO-C n h 2n+1 O- straight-chain alkoxy with carbon number n

[0254] -V -CH=CH 2

[0255] V-CH 2 =CH-

[0256] -V1 -CH=CH-CH 3

[0257] 1V-CH 3 -CH=CH-

[0258] -2V -CH 2 -CH 2 -CH=CH 3

[0259] V2-CH 3 =CH-CH 2 -CH 2 -

[0260] -2V1-CH 2 -CH 2 -CH=CH-CH 3

[0261] 1V2-CH 3 -CH=CH-CH 2 -CH 2 -

[0262] (connecting group)

[0263] -CF2O- -CF 2 -O-

[026...

Embodiment 5～8

[0286] In addition, a liquid crystal display device in PSVA mode was produced using a liquid crystal composition obtained by adding 0.3 mass % of formula (XX-4) as a polymerizable compound to 99.7 mass % of each liquid crystal composition of LC-1 to LC-4. None of the elements exhibited a defect, and sufficient high-speed response was confirmed.

Embodiment 9～12

[0288] Using a liquid crystal composition obtained by adding 0.35% by mass of a compound of formula (XX-2) as a polymerizable compound to 99.65% by mass of liquid crystal composition LC-A, a PSVA mode liquid crystal display element was produced, and a burn-in phenomenon was observed.

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PUM

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Abstract

The present invention addresses the problem that a negative [delta][epsilon] value having a large absolute value, a small rotational viscosity ([gamma]1), a large elastic modulus (K33), a low (solid phase)-(nematic phase) transition temperature (Tcn), a high (nematic phase)-(isotropic liquid phase) transition temperature (Tni) and a large voltage holding ratio (VHR) are demanded. The present invention also addresses the problem of providing a rapid-response liquid crystal display element of a VA type, a PSVA type, a PSA type, a FFS type or the like, which is produced using the same, rarely undergoes or never undergoes display failures such as burning-in and display unevenness and has excellent display quality. Provided are: a liquid crystal composition which contains a compound representedby formula (I-1) as a first component and a compound represented by formula (I-2) as a second component and has a negative dielectric anisotropy ([delta][epsilon]) value; and a liquid crystal displayelement produced using the liquid crystal composition.

Description

technical field [0001] The present invention relates to a nematic liquid crystal composition having a negative dielectric constant anisotropy (Δε), which is useful as a liquid crystal display material, and a liquid crystal display element using the nematic liquid crystal composition. Background technique [0002] Liquid crystal display devices have been used in clocks and calculators, and have been used in various household electrical equipment, measuring equipment, automotive panels, mobile phones, computers, and televisions. Examples of liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, DS (Dynamic Light Scattering) type, GH (Guest Host) type, IPS (In-Plane Switching) type, and FFS type. (Fringe Field Switching) type, OCB (Optically Compensated Birefringence) type, ECB (Voltage Controlled Birefringence) type, VA (Vertical Alignment) type, PSVA type, PSA type, CSH (Color Hypervertic) type or FLC (Fe Electrical liquid crystal...

Claims

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Application Information

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IPC IPC(8): C09K19/54C09K19/12C09K19/20C09K19/30C09K19/42G02F1/13
CPCC09K19/12C09K19/20C09K19/30C09K19/42C09K19/54G02F1/13
Inventor 须藤豪后藤麻里奈
Owner DAINIPPON INK & CHEM INC