Abstract: There is provided a liquid crystal display device of a PSA type or the like that uses the polymerizable compound-containing liquid crystal composition, having a sufficiently fast response speed, capable of 3D displaying. Uniform and stable orientation control can be obtained at a lower energy cost. Provided are the polymerizable compound-containing liquid crystal composition containing one or two or more polymerizable compounds represented by general formula (M) as the first component, and containing one or two or more compounds represented by general formula (Na), general formula (Nb), or general formula (Nc) having a naphthalene unit as the second component. The liquid crystal display device uses the same.

Abstract: A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness or the like, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.

Abstract: A polymerizable compound-containing liquid crystal composition of the present invention relates to a liquid crystal composition containing a polymerizable compound represented by general formula (I) and a compound represented by general formula (II) and can be used for a liquid crystal display device imparted with liquid crystal aligning ability by polymerization. The polymerizable liquid crystal composition is required to cause no precipitation in a wide temperature range and have a low viscosity corresponding to fast switching, and a liquid crystal display device using the composition is required to have more stable alignment after polymerization and to cause no defect in display characteristics. In the present invention, the problems can be solved using a specified compound.

Abstract: Without reductions in refractive index anisotropy (?n) and nematic phase-isotropic liquid phase transition temperature (Tni), the liquid crystal composition has sufficiently low solid phase-nematic phase transition temperature (Tcn), sufficiently small viscosity (?), sufficiently small rotational viscosity (?1), a large elastic constant (K33), and negative dielectric anisotropy (??) with a large absolute value. The liquid crystal composition contains a first component that is a compound represented by Formula (N2), a second component that is at least one compound represented by General Formula (N3), and a third component that is at least one compound having a negative dielectric anisotropy (??) with an absolute value of greater than three. There is also provided a liquid crystal display device using such a liquid crystal composition.

Abstract: The present invention relates to a nematic liquid crystal composition useful as a liquid crystal display material, the liquid crystal composition having negative dielectric anisotropy (??), and to a liquid crystal device element including the liquid crystal composition. The liquid crystal composition of the present invention has sufficiently low viscosity (?), sufficiently low rotational viscosity (?1), a large elastic constant (K33), and a negative dielectric anisotropy (??) whose absolute value is large, without reducing the refractive index anisotropy (?n) or the nematic-isotropic liquid phase transition temperature (Tni). Provided is, for example, a VA-mode liquid crystal display element including the liquid crystal composition, the liquid crystal display element having no or minimal display defects and having excellent display quality and a fast response.

Abstract: The present invention relates to nematic liquid crystal compositions having a negative dielectric anisotropy (??) 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 (?), sufficiently low rotational viscosity (?1), high elastic constant (K33), and a dielectric anisotropy (??) large in absolute value without decreasing the refractive index anisotropy (?n) 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.

Abstract: A polymerizable compound-containing liquid crystal composition of the present invention relates to a liquid crystal composition containing a polymerizable compound represented by general formula (I) and a compound represented by general formula (II) and can be used for a liquid crystal display device imparted with liquid crystal aligning ability by polymerization. The polymerizable liquid crystal composition is required to cause no precipitation in a wide temperature range and have a low viscosity corresponding to fast switching, and a liquid crystal display device using the composition is required to have more stable alignment after polymerization and to cause no defect in display characteristics. In the present invention, the problems can be solved using a specified compound.

Abstract: There is provided a polymerizable compound-containing liquid crystal composition having strong alignment regulating force of a liquid crystal compound. The polymerizable compound-containing liquid crystal composition includes: a polymerizable compound; and a liquid crystal compound, in which the polymerizable compound includes at least one polymerizable compound represented by General Formula (I), and in which the liquid crystal compound includes at least one component selected from the group consisting of at least one compound represented by General Formula (II) as a second component, at least one compound represented by General Formulae (IIIa), (IIIb), and (IIIc) as a third component, and at least one compound represented by General Formulae (IVa), (IVb), and (IVc) as a fourth component.

Abstract: The present invention relates to a nematic liquid crystal composition with negative dielectric anisotropy (??) useful as a liquid crystal display material, and to a liquid crystal display device using the composition. The liquid crystal composition of the present invention provides a liquid crystal composition that has sufficiently low viscosity (?), sufficiently low rotational viscosity (?1), high elastic modulus (K33), and negative dielectric anisotropy (??) with a large absolute value without decreasing the refractive index anisotropy (?n) and nematic phase-isotropic liquid phase transition temperature (Tni). A liquid crystal display device of VA-mode or the like that uses this composition is also provided, which has less or no display failures. The liquid crystal display device that uses the liquid crystal composition of the present invention is useful as an active-matrix-driving liquid crystal display device and can be used as a liquid crystal display device of VA-mode PSVA-mode, or the like.

Abstract: There is provided a positive liquid crystal composition that has a dielectric anisotropy useful as a liquid crystal display material. The liquid crystal composition has a liquid crystal phase in a wide temperature range, a low viscosity, a good solubility at low temperatures, a high resistivity, and a high voltage holding ratio, and is stable to heat and light. Use of this liquid crystal composition can provide a liquid crystal display element that has high displaying quality and is less likely to undergo displaying failures such as burn-in and dropping marks. A liquid crystal display element that employs the liquid crystal composition is useful for an active-matrix-driving liquid crystal display element and can be used for a liquid crystal display element that employs the TN mode, the IPS mode, the FFS mode, or the like.

Abstract: The present invention relates to a PSA-mode liquid crystal display device including a polymer produced by polymerizing a polymerizable compound by energy ray irradiation in a state in which a mixture of the polymerizable compound and a liquid crystal composition is held between the first substrate and the second substrate, the polymer having a number-average molecular weight of 50,000 or more in terms of polystyrene. In a PSA-mode display device in which alignment of liquid crystal molecules substantially vertically aligned between the substrates is controlled by applying a voltage, a pre-tilt angle can be properly given without being inhibited. Therefore, the present invention provides a PSA-mode display device with good alignment stability, uniform alignment within the substrates, and no or suppressed display defects and a method for producing the same.

Abstract: There is provided a liquid crystal composition having a sufficiently low viscosity (?), a sufficiently low rotational viscosity (?1), a high elastic constant (K33), and a negative dielectric anisotropy (??), the absolute value of the negative dielectric anisotropy being large, without a reduction in the refractive index anisotropy (?n) or the nematic phase-isotropic liquid phase transition temperature (Tni) thereof. By using the liquid crystal composition, it is possible to provide a liquid crystal display element, such as a VA-type liquid crystal display element, which eliminates or reduces the risk of a faulty display and realizes high display quality and a high-speed response. The liquid crystal display element including the liquid crystal composition according to the present invention may be suitably used as a liquid crystal display element for active-matrix driving and may also be used as, for example, a VA-type or PSVA-type liquid crystal display element.

Abstract: There are provided a polymerizable-compound-containing nematic liquid crystal composition which is useful as a material for a liquid crystal display and which has a negative dielectric anisotropy (??), and a liquid crystal display device using such a nematic liquid crystal composition. The polymerizable compound is polymerized without interference with generation of the pretilt angle of the liquid crystal molecules by exposure to ultraviolet in a process for producing a device, so that a PSA display device in which a proper pretilt angle is given and which has well stabilized alignment state, a high response speed, and excellent display quality with defective display being eliminated or reduced can be produced. A liquid crystal display device using the liquid crystal composition is useful as an active-matrix liquid crystal display device and can be applied to PSVA liquid crystal display devices.

Abstract: There is provided a liquid crystal composition having a sufficiently low viscosity (?), a sufficiently low rotational viscosity (?1), a high elastic constant (K33), and negative ?? with a high absolute value without decreasing the refractive index anisotropy (?n) and the nematic phase-isotropic liquid phase transition temperature (Tni); and a liquid crystal display device with a VA mode or the like that uses the liquid crystal composition and has high display quality and high response speed. The liquid crystal display device that uses the liquid crystal composition of the present invention has a distinguished feature of high-speed response and is particularly useful as an active matrix driving liquid crystal display device. The liquid crystal display device is applicable to a VA mode, PSVA mode, PSA mode, IPS mode, or ECB mode liquid crystal display device.

Abstract: There is provided a liquid crystal composition having a dielectric anisotropy (??) large in absolute value, a sufficiently low viscosity (?), a sufficiently low rotational viscosity (?1), and a high elastic constant (K33) without decreased refractive index anisotropy (?n) or nematic phase-isotropic liquid phase transition temperature (Tni). A liquid crystal display device, such as a VA mode liquid crystal display device, including the liquid crystal composition has high response speed and good display quality with few or no display defects. The liquid crystal display device including the liquid crystal composition is useful as an active-matrix liquid crystal display device and is applicable as a liquid crystal display device such as a VA mode or PSVA mode liquid crystal display device.

Abstract: The present invention provides a nematic liquid crystal composition having a negative dielectric anisotropy with an absolute value from 2 to 8 at 25° C., the composition containing at least one liquid crystal compound having a negative dielectric anisotropy with an absolute value of 4 or more and at least one antioxidant, wherein the amount of the liquid crystal compound is not less than 3%; the present invention also provides a liquid crystal display device using such a liquid crystal composition.

Abstract: A polymerizable liquid crystal composition of the present invention contains at least two polymerizable compounds having different rates of polymerization reaction and a liquid crystal compound. The polymerizable liquid crystal composition is characterized in that the rate of polymerization reaction of the polymerizable compounds contained in the composition can be easily made suitable for the specification of a UV irradiation lamp, the pretilt angle, which affects the display performance, can be easily controlled, a problem of unpolymerization of polymerizable compounds, which affects display unevenness, image sticking, etc., can be solved, and thus a PSA liquid crystal display element having good performance and high reliability can be produced. The polymerizable liquid crystal composition is suitable as a practical liquid crystal composition.

Abstract: A polymerizable compound-containing liquid crystal composition of the present invention relates to a liquid crystal composition containing a polymerizable compound represented by general formula (I) and a compound represented by general formula (II) and can be used for a liquid crystal display device imparted with liquid crystal aligning ability by polymerization. The polymerizable liquid crystal composition is required to cause no precipitation in a wide temperature range and have a low viscosity corresponding to fast switching, and a liquid crystal display device using the composition is required to have more stable alignment after polymerization and to cause no defect in display characteristics. In the present invention, the problems can be solved using a specified compound.

Abstract: There is provided a liquid crystal composition having a sufficiently low viscosity (?), a sufficiently low rotational viscosity (?1), a high elastic constant (K33), and a negative dielectric anisotropy (??), the absolute value of the negative dielectric anisotropy being large, without a reduction in the refractive index anisotropy (?n) or the nematic phase-isotropic liquid phase transition temperature (Tni) thereof. By using the liquid crystal composition, it is possible to provide a liquid crystal display element, such as a VA-type liquid crystal display element, which eliminates or reduces the risk of a faulty display and realizes high display quality and a high-speed response. The liquid crystal display element including the liquid crystal composition according to the present invention may be suitably used as a liquid crystal display element for active-matrix driving and may also be used as, for example, a VA-type or PSVA-type liquid crystal display element.

Abstract: A polymerizable compound-containing liquid crystal composition of the present invention relates to a liquid crystal composition containing a polymerizable compound represented by general formula (I) and a compound represented by general formula (II) and can be used for a liquid crystal display device imparted with liquid crystal aligning ability by polymerization. The polymerizable liquid crystal composition is required to cause no precipitation in a wide temperature range and have a low viscosity corresponding to fast switching, and a liquid crystal display device using the composition is required to have more stable alignment after polymerization and to cause no defect in display characteristics. In the present invention, the problems can be solved using a specified compound.