Abstract: The present invention provides a compound represented by the general formula (i), which has a partial structure Ki1 represented by one of the general formulae (K-1) to (K-6) and has a ring B with at least one P-Sp- group and with at least one Ri2 (Ri2 denotes a linear or branched alkyl group having 2 to 10 carbon atoms or a linear or branched halogenated alkyl group having 2 to 10 carbon atoms, —CH2— in the alkyl or halogenated alkyl group is optionally substituted with —CH?CH—, —O—, —COO—, or —OCO—, but —O— is not adjacent to another —O—). Thus, the compound in a liquid crystal composition adsorbs to substrates between which the liquid crystal composition (a liquid crystal layer) exists. The compound can hold vertically aligned liquid crystal molecules, can improve alignment stability, and can ensure low-temperature storage stability.

Abstract: [Object] An object of the present invention is to provide a liquid crystal composition containing a polymerizable compound for use in the manufacture of a PSA or PSVA liquid crystal display device. The polymerizable compound has a sufficiently high polymerization rate. The PSA or PSVA liquid crystal display device has few or no display defects due to a change in pretilt angle, has an adequate pretilt angle, and has high responsiveness. The present invention also provides a liquid crystal display device having the liquid crystal composition. [Solution] The object is achieved by using a liquid crystal composition containing one or two or more polymerizable compounds represented by the general formula (I).

Abstract: The present invention provides a compound represented by the general formula (i), which has a partial structure Ki1 represented by one of the general formulae (K-1) to (K-6) and has a ring B with at least one P-Sp- group and with at least one Ri2 (Ri2 denotes a linear or branched alkyl group having 2 to 10 carbon atoms or a linear or branched halogenated alkyl group having 2 to 10 carbon atoms, —CH2— in the alkyl or halogenated alkyl group is optionally substituted with —CH?CH—, —O—, —COO—, or —OCO—, but —O— is not adjacent to another —O—). Thus, the compound in a liquid crystal composition adsorbs to substrates between which the liquid crystal composition (a liquid crystal layer) exists. The compound can hold vertically aligned liquid crystal molecules, can improve alignment stability, and can ensure low-temperature storage stability.

Abstract: The liquid crystal display device including a liquid crystal layer between a first substrate and a second substrate, the first substrate having a common electrode and a color filter, the second substrate having a plurality of pixels and having a pixel electrode in each pixel, the liquid crystal layer containing a liquid crystal composition, wherein the liquid crystal display device has no alignment film on one or both of the first substrate and the second substrate, but has an alignment control layer formed of a polymer of two or more polymerizable compounds, and contains a compound represented by the general formula (III).

Abstract: [Object] An object of the present invention is to provide a liquid crystal composition containing a polymerizable compound for use in the manufacture of a PSA or PSVA liquid crystal display device. The polymerizable compound has a sufficiently high polymerization rate. The PSA or PSVA liquid crystal display device has few or no display defects due to a change in pretilt angle, has an adequate pretilt angle, and has high responsiveness. The present invention also provides a liquid crystal display device having the liquid crystal composition. [Solution] The object is achieved by using a liquid crystal composition containing one or two or more polymerizable compounds represented by the general formula (I).