NEMATIC LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME

摘要

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.

主权项

1. 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.