The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.

The invention relates to a polymerisable LC material comprising at least one di- or multireactive mesogenic compound and at least one compound of formula I,

##STR00001##

in which the parameter R.sup.1, A.sup.1, Z.sup.1, Z.sup.2, n, Sp, P, p1, p2, L.sup.1, L.sup.2, r1, r2, m and R.sup.2 have one of the meanings as given in claim 1. Furthermore, the present invention relates also to a method for the preparation of a polymerisable LC material, a polymer film obtainable from the corresponding polymerisable LC material, to a method of preparation of such polymer film, and to the use of such polymer film and said polymerisable LC material for optical, electro-optical, decorative or security devices.

An object of the present invention is to provide a polymerizable liquid crystal composition used for formation of an optically anisotropic film having excellent moisture-heat resistance and an excellent surface condition, an optically anisotropic film, an optical film, a polarizing plate, and an image display device. The polymerizable liquid crystal composition of an embodiment of the present invention is a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound and a compound represented by Formula (1): L.sup.1-SP.sup.1-(E.sup.3-A.sup.1).sub.m-E.sup.1-G.sup.1-C(═O)—O—C(═O)-G.sup.2-E.sup.2-(A.sup.2-E.sup.4).sub.n-SP.sup.2-L.sup.2, in which a content of the compound represented by Formula (1) is 0.01 to 5 parts by mass with respect to 100 parts by mass of the polymerizable liquid crystal compound.

An object of the present invention is to provide a polymerizable liquid crystal composition used for formation of an optically anisotropic film having excellent moisture-heat resistance and an excellent surface condition, an optically anisotropic film, an optical film, a polarizing plate, and an image display device. The polymerizable liquid crystal composition of an embodiment of the present invention is a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound and a compound represented by Formula (1): L.sup.1-SP.sup.1-(E.sup.3-A.sup.1).sub.m-E.sup.1-G.sup.1-C(═O)—O—C(═O)-G.sup.2-E.sup.2-(A.sup.2-E.sup.4).sub.n-SP.sup.2-L.sup.2, in which a content of the compound represented by Formula (1) is 0.01 to 5 parts by mass with respect to 100 parts by mass of the polymerizable liquid crystal compound.

Disclosed is a polymerizable compound useful in the preparation of a polymer which is capable of producing, for example, an optical film having excellent in-plane thickness uniformity and improved in-plane uniformity in optical properties. The polymerizable compound of the present disclosure is represented by formula (I):

##STR00001##

where Ar is represented by the following formula (II-1) or (II-2):

##STR00002##

The present invention relates to a liquid crystal (LC) medium comprising polymerisable compounds, to a process for its preparation, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, and to LC displays comprising it.

The present invention relates to a liquid crystal (LC) medium comprising polymerisable compounds, to a process for its preparation, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, and to LC displays comprising it.

Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy and large dielectric anisotropy, or the liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device including the composition. The liquid crystal composition contains a specific compound having small optical anisotropy as a first component, and a specific compound having positive dielectric anisotropy as a second component, and may contain a specific compound having high maximum temperature or small viscosity as a third component, a specific compound having positive dielectric anisotropy as a fourth component, or a specific compound having negative dielectric anisotropy as a fifth component.

A negative liquid crystal material includes a liquid crystal compound and a viscosity-decreasing agent. The liquid crystal compound has a negative dielectric anisotropy. The viscosity-decreasing agent is represented by the following chemical formula (1):

##STR00001##

in the chemical formula (1), X and Y are each H or a halogen group, and at least one of X and Y is a halogen group; and R and R are each a linear saturated alkyl group having 1 to 5 carbon atoms or a linear saturated alkoxy group having 1 to 5 carbon atoms.

Provided are a dye compound, a composition comprising the dye compound, and a display device using the dye compound. The dye compound is represented by Formula 1.

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