Abstract: The disclosure provides a liquid crystal device including a liquid crystal composition containing a dichroic dye (dye-containing liquid crystal composition) that is in a light transmissive state when no voltage is applied to the transparent electrode and in a light scattering state when voltage is applied. The liquid crystal composition exhibits a negative dielectric constant anisotropy. The haze value of the liquid crystal device is 10% or less when no voltage is applied at 25° C., and the haze value is 50% or more when a rectangular wave voltage (AC 50 V, 60 Hz) is applied. The voltage holding ratio of the dye-containing liquid crystal composition is 60% or less at 25° C. The liquid crystal device provided by the disclosure is used as a component to provide a liquid crystal display apparatus, a light control apparatus, or a light transmitting apparatus with a high contrast.

Abstract: There is provided a liquid crystal composition having the following properties without reductions in refractive index anisotropy (?n) and nematic phase-isotropic liquid phase transition temperature (Tni): sufficiently small viscosity (?), sufficiently small rotational viscosity (?1), a large elastic constant (K33), and negative dielectric anisotropy (??) with a large absolute value. There is also provided a liquid crystal display device of, for example, a VA type in which such a liquid crystal composition is used and which has a high response speed and excellent display quality with defective display being eliminated or reduced. The liquid crystal display device using the liquid crystal composition of the present invention is useful as an active-matrix liquid crystal display device and can be used in liquid crystal display devices of, for instance, a VA mode and PSVA mode.

Abstract: There is provided a liquid crystal composition whose refractive index anisotropy (?n) and nematic phase-isotropic liquid phase transition temperature (Tni) are sufficiently high, whose viscosity (?) is sufficiently low, whose rotational viscosity (?1) is sufficiently low, whose elastic constant (K33) is high, whose dielectric anisotropy (??) is high or whose ?? is negative with a large absolute value, and whose decrease in reliability after UV irradiation is small, and also provide a liquid crystal display element including the same, which has the excellent display quality and the high response speed.

Abstract: There is provided a liquid crystal composition having the following properties without reductions in refractive index anisotropy (?n) and nematic phase-isotropic liquid phase transition temperature (Tni): sufficiently small viscosity (?), sufficiently small rotational viscosity (?1), a large elastic constant (K33), and negative dielectric anisotropy (??) with a large absolute value. There is also provided a liquid crystal display device of, for example, a VA type in which such a liquid crystal composition is used and which has a high response speed and excellent display quality with defective display being eliminated or reduced. The liquid crystal display device using the liquid crystal composition of the present invention is useful as an active-matrix liquid crystal display device and can be used in liquid crystal display devices of, for instance, a VA mode and PSVA mode.