Nematic liquid crystal composition and liquid crystal display element using same

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...

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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

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