76results about How to "Excellent voltage retention" patented technology

One embodiment of the present invention provides a liquid crystal photo-alignment agent that includes a polyamic acid copolymer including a repeating unit having the following Formula 1 and a repeating unit having the following Formula 2; a polyimide copolymer including a repeating unit having the following Formula 3 and a repeating unit having the following Formula 4; or a combination thereof: wherein the definition of R1 to R8 are the same as in the specification. The liquid crystal photo-alignment agent can have improved liquid crystal alignment properties, electrical characteristics such as voltage holding ratio, pretilt angle, residual DC, and the like, printability, cleaning stability, and spot stability, and is capable of unidirectionally aligning liquid crystals by ultraviolet (UV) exposure.

The present invention provides a liquid crystal display device whereby a good voltage holding ratio is maintained for a long time using an optical alignment film, and the occurrence of ghosting and spots in a display screen image is prevented. This liquid crystal display device is provided with: a liquid crystal layer containing liquid crystal molecules and an antioxidant; a sealing material obtained by curing a sealing resin containing a compound having at least one type of first connective functional group selected from the group consisting of an epoxy group, a methoxysilane group, and an ethoxysilane group; and an optical alignment film having at least one type of alignment film polymer having an ester group; the at least one type of alignment film polymer including an optical alignment film polymer having at least one type of photofunctional group selected from the group consisting of a cinnamate group, a carbonyl group, an azobenzene group, a coumarin group, a stilbene group, and a phenol ester group, and at least one type of second connective functional group selected from the group consisting of -COOH, -NH2, -NHR, -SH, and -OH being present on the surface of the optical alignment film.

A liquid crystal composition including one or two or more compounds selected from the group consisting of compounds represented by general formula (i) shown below, and one or two or more compounds selected from the group consisting of compounds represented by general formula (ii) shown below. (In formulae, R i1 and R ii1 independently represent an alkyl group having 1 to 8 carbon atoms, and one -CH 2 - group or two or more -CH 2 - groups which are not adjacent to each other in the alkyl group may be independently substituted by -CH=CH-, -C‰¡C-, -O-, -CO-, -COO- or -OCO, and one or two or more hydrogen atoms in the alkyl group independently may be substituted by a fluorine atom or a chlorine atom; m i1 represents 0, 1 or 2; A i1 represents 1,4-phenylene group in which a hydrogen atom may be substituted by a fluorine atom or a chlorine atom, and when m i1 represents 2, A i1 may be the same or different; X i1 independently represents a hydrogen atom, a fluorine atom or a chlorine atom; m ii1 represents 0 or 1; X ii1 , X ii2 , X ii3 and X ii4 independently represent a hydrogen atom, a fluorine atom or a chlorine atom; and X ii5 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, -CF 3 or -OCF 3 .)

The invention provides a liquid crystal aligning agent, a liquid crystal alignment film and a liquid crystal display device. The liquid crystal alignment agent can produce the liquid crystal display element with features of high speed response and excellent voltage holding rate, afterimage characteristic, light resistance and excellent uniform coating property. The liquid crystal aligning agent, comprises (A) at least one polymer selected from a group consisting of polyamic acid, polyimide, (methyl ) acrylic acid polymer, polysiloxane and poly(amic ester); and the polymer has groups shown by the following formula (1), wherein the group R3 is preferably the group shown by the following formula (2).

The present invention provides a vertical alignment type liquid crystal display element capable of achieving vertical alignment, excellent in voltage retention, and free of contrast unevenness and display defects even when placed in a high-humidity environment, and having high reliability, and a liquid crystal used therein Orienting agent. The vertical alignment type liquid crystal aligning agent contains 100 parts by weight of polyamic acid obtained by reacting tetracarboxylic dianhydride and diamine compound and / or its imidized polymer and 0.01 to 100 parts by weight of 2 Or a compound with two or more epoxy groups.