Patent ID: 8885124

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 colorants, a diketopyrrolopyrrole pigment and/or anionic red organic dye in a R pixel portion, at least one selected from the group consisting of a halogenated copper phthalocyanine pigment, a phthalocyanine green dye, and a mixture of a phthalocyanine blue dye and an azo yellow organic dye in a G pixel portion, and a e-type copper phthalocyanine pigment and/or cationic blue organic dye in a B pixel portion.