Liquid crystal compositions and liquid crystal display devices
AssigneesChisso Corporation, Chisso Petrochemical Corporation
InventorsYasuhiro Kubo, Kanetsugu Terashima
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Abstract
Liquid crystal compositions having board nematic phase range, low viscosity, low threshold voltage and large pre-tilt angle, while meeting the general properties required for AM-LCD. The compositions contain at least one of the compounds of the formulas (I-1) to (I-3), at least one of the compounds of the formulas (II-1) to (II-4), at least one of the compounds of the formulas (III-1) and (III-2), at least one of the compounds of the formulas (IV-1) to (IV-3), and optionally at least one of the compounds of the formulas (V-1) and (V-2), as described in the specification.
Claims18
A liquid crystal composition which comprises Component I comprising at least one compound selected from the compounds of the formulas (I-1) to (I-3), Component II comprising at least one compound selected from the compounds of the formulas (II-1) to (II-4), Component III comprising at least one compound selected from the compounds of the formulas (III-1) and (III-2), and Component IV comprising at least one compound selected from the compounds of the formulas (IV-1) to (IV-3),
- in which R and R′ each independently represent an alkyl group of 2 to 7 carbon atoms, Y independently represents H or F, and n represents an integer of 0 to 4.
A liquid crystal composition which consists essentially of four components of Component I comprising at least one compound selected from the compounds of the formulas (I-1) to (I-3), Component II comprising at least one compound selected from the compounds of the formulas (II-1) to (II-4), Component III comprising at least one compound selected from the compounds of the formulas (III-1) and (III-2), and Component IV comprising at least one compound selected from the compounds of the formulas (IV-1) to (IV-3),
- in which R and R′ each independently represent an alkyl group of 2 to 7 carbon atoms, Y independently represents H or F, and n represents an integer of 0 to 4.
Dependencies are inferred from the claim text.