US 2016/0168462 A1 · NEMATIC LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME

Abstract

The present invention relates to nematic liquid crystal compositions having a negative dielectric anisotropy (Δ∈) and useful as liquid crystal display materials and to liquid crystal display devices including such liquid crystal compositions. The present invention provides a liquid crystal composition with sufficiently low viscosity (η), sufficiently low rotational viscosity (γ1), high elastic constant (K33), and a dielectric anisotropy (Δ∈) large in absolute value without decreasing the refractive index anisotropy (Δn) or nematic-isotropic liquid phase transition temperature (Tni) thereof. A liquid crystal display device including such a liquid crystal composition has high response speed and good display quality with few or no display defects. The liquid crystal display device is particularly useful as an active-matrix liquid crystal display device. The liquid crystal display device is applicable to display modes such as the VA mode and the PSVA mode.

Claims20

Dependent claims

A liquid crystal composition comprising a first component and a second component, the first component comprising at least one compound represented by general formula (I):

(wherein q is 0 or 1, and R55 is an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms), the first component being present in an amount of 3% to 25% by mass, the second component comprising a compound having a negative dielectric anisotropy (Δ∈) larger than 3 in absolute value.

Dependencies are inferred from the claim text.

Facts

Application

14/436,644Filed 21 Oct 2013

Priority

JP 2012-23470524 Oct 2012

Published

16 Jun 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

C09K 19/3066
Cyclohexane rings: in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
C09K 19/0216
Characterised by optical, electrical or physical properties of the components, in general: super Birefringence Effect ; Electrically Controlled…
C09K 19/20
Containing at least two benzene rings: linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
C09K 19/3003
Cyclohexane rings: compounds containing at least two rings in which the different rings are directly linked

Nematic liquid crystal composition and liquid crystal display device including the same

Life of this patent

Nematic liquid crystal composition and liquid crystal display device including the same

Life of this patent

Abstract

Claims20