Nematic liquid-crystal composition and liquid-crystal display element including same

A liquid crystal composition and compound technology, which is applied in the field of liquid crystal display elements and nematic liquid crystal compositions, can solve the problems of low driving voltage, high transmittance and high response speed, and achieve large refractive index anisotropy and low High drive voltage and high voltage retention
CN107532085APending Publication Date: 2018-01-02DIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DIC CORP
Publication Date
2018-01-02

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Abstract

The present invention addresses the problem of: providing a liquid-crystal composition which has a high refractive index anisotropy ([delta]n), a low rotational viscosity ([gamma]1), and a large elasticity constant (K33) and further has a high voltage holding ratio (VHR) and a negative dielectric anisotropy ([delta][epsilon]); and providing a liquid-crystal display element of excellent display quality, which includes the liquid-crystal composition and is prevented or inhibited from suffering display failures including dropping marks, image persistence, and display unevenness and which combinesa low operating voltage, a high transmittance, and a high response speed. The liquid-crystal composition, which has negative dielectric anisotropy, has a value calculated by the following expression(I) in the range of 1-50: |[delta][epsilon]| / P*100 expression (I) where |[delta][epsilon]| is the absolute value of dielectric anisotropy and P ([mu]m) is the spiral pitch, and comprises one or more of compounds represented by the general formula (np-1) and the general formula (np-2).
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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 nematic liquid crystal composition. Background technique

[0002] Liquid crystal display devices are used in various household electrical appliances such as clocks and electronic calculators, measuring 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, and IPS (in-plane switching) type , OCB (Optically Compensated Birefringence) type, ECB (Electrically Controlled Birefringence) type, VA (Vertical Alignment) type, CSH (Color Super Vertical Alignment) type, or FLC (Ferroelectric Liquid Crystal) and the l...

Claims

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