Patent ID: 8860912

Claim:
A liquid crystal display device comprising a first substrate, a second substrate, a liquid crystal composition layer held between the first substrate and the second substrate, a color filter including a black matrix and at least RGB three-color pixel portions, a pixel electrode, and a common electrode, wherein the liquid crystal composition layer includes a liquid crystal composition which contains at least one compound selected from a compound group represented by general formula (LC1) to general formula (LC4), (in the formulae, R 1 and R 2 each independently represent an alkyl group having 1 to 15 carbon atoms, at least one CH 2 group in the alkyl group may be substituted by —O—, —CH═CH—, —CO—, —OCO—, —COO—, —C≡C—, —CF 2 O—, or —OCF 2 — so that oxygen atoms are not directly adjacent to each other, at least one hydrogen atom in the alkyl group may be arbitrarily substituted by a halogen, A 1 and A 2 each independently represent any one of the following structures, (at least one CH 2 group in a cyclohexane ring in the structures may be substituted by an oxygen atom, at least one CH group in a benzene ring in the structures may be substituted by a nitrogen atom, and at least one hydrogen atom in the structures may be substituted by Cl, CF 3 , or OCF 3 ), Z 1 to Z 4 each independently represent a single bond, —CH═CH—, —C≡C—, —CH 2 CH 2 —, —(CH 2 ) 4 —, —COO—, —OCH 2 —, —CH 2 O—, —OCF 2 —, or —CF 2 O—, Z 5 represents a CH 2 group or an oxygen atom, at least one of Z 1 and Z 2 present is not a single bond, l 1 represents 0 or 1, m 1 and m 2 each independently represent 0 to 3, and m 1 +m 2 is 1, 2, or 3), and the RGB three-color pixel portions include, as a colorant in a G pixel portion, a halogenated metal phthalocyanine pigment containing as a central metal a metal selected from the group consisting of Al, Si, Sc, Ti, V, Mg, Fe, Co, Ni, Zn, Ga, Ge, Y, Zr, Nb, In, Sn, and Pb, wherein when the central metal is trivalent, any one of a halogen atom, a hydroxyl group, and a sulfonic acid group is bonded to the central metal or the central metal is oxo- or thio-bridged, and when the central metal is a tetravalent metal, an oxygen atom or any two, which may be the same or different, selected from halogen atoms, hydroxyl groups, and sulfonic acid groups are bonded to the central metal.