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Nematic liquid crystal composition and liquid crystal display element using same

A technology of liquid crystal composition and compound, applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problem that the response speed of liquid crystal composition cannot be said to be sufficient, and achieve the effect of excellent display quality and fast response speed

Active Publication Date: 2015-12-02
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] In addition, Patent Document 8 discloses that the response speed of the homeotropic alignment liquid crystal cell is improved by using a liquid crystal material having a large index (FoM) shown in (Formula 1), but the improvement of the response speed of the liquid crystal composition described in the specification is still insufficient. can't say enough

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

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Embodiment

[0152] The present invention will be described in further detail by enumerating examples below, 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 %".

[0153] The following abbreviations are used to describe the compounds in the Examples.

[0154] (side chain)

[0155] -n-C n h 2n+1 straight-chain alkyl group with n carbon atoms

[0156] n-C n h 2n+1 - straight-chain alkyl group with n carbon atoms

[0157] -On-OC n h 2n+1 straight-chain alkoxy group with n carbon atoms

[0158] nO-C n h 2n+1 O- straight-chain alkoxy group with n carbon atoms

[0159] -V-CH=CH 2

[0160] V-CH 2 =CH-

[0161] -V1-CH=CH-CH 3

[0162] 1V-CH 3 -CH=CH-

[0163] -2V-CH 2 -CH 2 -CH=CH 3

[0164] V2-CH 3 =CH-CH 2 -CH 2 -

[0165] -2V1-CH 2 -CH 2 -CH=CH-CH 3

[0166] 1V2-CH 3 -CH=CH-CH 2 -CH 2

[0167] (connecting group)

[0168] -nO--C n h 2n O- straight-cha...

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Abstract

The present invention addresses the problem of providing: a liquid crystal composition which has a sufficiently low solid phase-nematic phase transition temperature (Tcn), a sufficiently small viscosity (η), a sufficiently small rotational viscosity (γ1), a high coefficient of elasticity (K33), and a negative dielectric anisotropy (Δε) with a large absolute value without reducing the refractive index anisotropy (Δｎ) and the nematic phase-isotropic liquid phase transition temperature (Tni); and further a liquid crystal display element which uses the same, has no or suppressed display defects of a VA type, etc., and has excellent display quality and a high response speed. The present invention provides: a liquid crystal composition which comprises a compound represented by formula (N2) as a first component, one type or more of a compound represented by general formula (N3) as a second component, and one type or more of a compound having a negative dielectric anisotropy (Δε) with an absolute value greater than 3 as a third component; and a liquid crystal display element which uses the same.

Description

technical field [0001] The present invention relates to a nematic liquid crystal composition having a negative dielectric constant anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display element using the same. Background technique [0002] Liquid crystal display devices are used in clocks, calculators and other household electrical appliances, measurement equipment, automotive panels, word processors, electronic notebooks, printers, computers, televisions, etc. Representative 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 OCB type. (Optical Compensated Birefringence) type, ECB (Voltage Controlled Birefringence) type, VA (Vertical Alignment) type, CSH (Color Super Vertical) type or FLC (Ferroelectric Liquid Crystal) and so on. Further, examples of the driving method include static driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/12C09K19/20C09K19/42C09K19/54G02F1/13G02F1/137
CPCC09K19/44C09K19/3003C09K2019/0448C09K2019/122C09K2019/123C09K2019/3004C09K2019/301C09K2019/3016C09K2019/3027C09K19/3066C09K19/3001C09K19/542C09K2019/548G02F1/1362
Inventor 须藤豪川上正太郎
Owner DIC CORP
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