Abstract: In a photo-alignment liquid crystal panel capable of achieving a uniform display quality and highly reliable photo-alignment properties, and excellent electro-optical properties (transmittance, contrast, viewing angle, and response) for improving a basic performance and a high image quality of a liquid crystal panel and a liquid crystal display device, a structural composition of a polymer, which is preferable as a photo-alignment film, is unclear. The invention optimizes a copolymerization ratio and a modification rate of a photopolymer in order for a compound having photo-alignment properties to be contained as the photo-alignment film so as to enable the photo-alignment film to have the photo-alignment properties, and achieves the discovery of a preferred structural composition of the polymer.

Abstract: In a photo-alignment liquid crystal panel capable of achieving a uniform display quality and highly reliable photo-alignment properties, and excellent electro-optical properties (transmittance, contrast, viewing angle, and response) for improving a basic performance and a high image quality of a liquid crystal panel and a liquid crystal display device, a structural composition of a polymer, which is preferable as a photo-alignment film, is unclear. The invention optimizes a copolymerization ratio and a modification rate of a photopolymer in order for a compound having photo-alignment properties to be contained as the photo-alignment film so as to enable the photo-alignment film to have the photo-alignment properties, and achieves the discovery of a preferred structural composition of the polymer.

Abstract: A liquid crystal display device suppresses generation of image sticking in AC mode. A liquid crystal display device comprises an alignment film arranged on at least one of a pair of substrates. The alignment film comprises a polymer containing a first constitutional unit and a second constitutional unit. The first constitutional unit controls alignment of the liquid crystal molecules by photoirradiation. The second constitutional unit controls alignment of the liquid crystal molecules regardless of photoirradiation.

Abstract: The present invention provides a liquid crystal display device in which a good alignment state can be obtained, and the occurrence of AC image sticking can be suppressed. The present invention is a liquid crystal display device including a liquid crystal layer including liquid crystal molecules and being interposed between a pair of substrates, and an alignment layer provided on a side of the liquid crystal layer in at least one of the substrates, wherein the alignment layer includes a liquid crystal alignment polymer having a property of controlling and aligning the liquid crystal molecules, and the surface side chain density in the alignment layer is not less than 2.0.

Abstract: The present invention provides a liquid crystal display device capable of suppressing generation of the image sticking in AC mode and a polymer for alignment film materials.

Abstract: The present invention provides a liquid crystal display device that has good reliability and can inhibit an image sticking phenomenon even when a comparatively low temperature is set for baking the alignment layer, and a method for manufacturing such a liquid crystal display device. The liquid crystal display device of the prevent invention includes a configuration in which a liquid crystal layer including liquid crystal molecules is sandwiched between a pair of substrates, and includes an alignment layer on a surface of at least one of the substrates on the liquid crystal layer side thereof. The alignment layer is obtained by performing an aligning treatment by light irradiation on a layer formed using an alignment layer material including a first constituent material and a second constituent material. The first constituent material demonstrates a property of controlling the alignment of the liquid crystal molecules under light irradiation.

Abstract: The present invention provides a liquid crystal display device capable of suppressing generation of the image sticking in AC mode and a polymer for alignment film materials.