摘要:
The present invention provides a polymerizable liquid crystal composition containing at least one polymerizable liquid crystal compound (I) having one polymerizable functional group in its molecule, at least one polymerizable liquid crystal compound (II) having two polymerizable functional groups in its molecule, and at least one compound (III) having tree or more aromatic rings at least one of which is substituted by an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms. Also, the present invention provides an optically anisotropic body using the polymerizable liquid crystal composition of the present invention.
摘要:
A ferroelectric liquid crystal composition having a long helical pitch and a light switching element having a quick response property are provided. This compositon comprises (1) at least one member selected from the group consisting of liquid crystal compounds having a smectic C phase and no helical structure and liquid crystal compounds having only a nematic phase as a liquid crystal phase and no helical structure and (2) at least one chiral smectic liquid crystal compounds.
摘要:
A ferroelectric chiral smectic liquid crystal composition comprising at least three kinds of chiral smectic liquid crystal compounds within which a difference in molecular chain length does not exceed a length corresponding to the straight alkyl chain having five carbon atoms is provided. A light switching element using the above-mentioned composition, and having an extremely quick response is also provided.
摘要:
A fluoroalkane derivative represented by the formula: wherein R denotes an alkyl group having 1 -16 carbon atoms, C * denotes an asymmetric carbon atom, R' denotes an alkyl or alkoxy group having 1 -16 carbon atoms; respectively denote a phenylene group a cyclohexylene group or a pyrimidinylene group p is 0 or 1, q is 0 or 1 when p is 1, r is 0 or 1; and I, m and n are respectively 0 or a positive integer satisfying the relationship of l + m + n ≧ 1. The fluoroalkane derivative has a fluorine atom providing a large dipole moment and directly connected to an asymmetric carbon atom, so that it provides a high speed responsive characteristic through an increased spontaneous polarization when contained in a liquid crystal - composition, especially a ferroelectric liquid crystal composition.
摘要:
L'invention a pour objet un mélange de cristaux liquides comportant une base de Schiff. Ce mélange de cristaux liquides est constitué par : - au moins une base de Schiff répondant à la formule : dans laquelle R¹ et R² qui peuvent être identiques ou différents, sont des radicaux alkyle de 1 à 7 atomes de carbone, et - au moins un composé choisi parmi :
a) les alkyl bicyclooctane carboxylates d'alkyl fluorophényle, b) les biphénylbicyclohexyldialkyle, c) les alkylcyclohexylcarboxylates de dicyanoalcoxyphényle, d) les bicyclohexylcarbonitrile dialkyle.
L'utilisation de tels mélanges permet l'obtention d'un taux de multiplexabilité élevé dans les dispositifs d'affichage mettant en jeu l'effet de biréfringence contrôlée électriquement.
摘要:
A ferroelectric chiral smectic liquid crystal composition containing two kinds of chiral smectic liquid crystal compound is provided. One of the said compounds shows twist sense of helix of right-handed and the other show twist sense of helix of left-handed and the direction of spontaneous polarization of component chiral smectic liquid crystal compounds is the same. This composition provides a liquid crystal display element which shows very quick response.