Optical compensatory sheet comprising transparent support and optically anisotropic layer
AssigneeFuji Photo Film Co., Ltd.
InventorsHideyuki Nishikawa, Ken Kawata
Life of this patent
Estimating the term…
Abstract
An optical compensatory sheet comprises a transparent support and an optically anisotropic layer. The optically anisotropic layer is formed from liquid crystal molecules. Three principal refractive indices of the optically anisotropic layer are different from each other.
Claims13
An optical compensatory sheet comprising a transparent support and an optically anisotropic layer formed from liquid crystal molecules, wherein three principal refractive indices of the optically anisotropic layer are different from each other, and wherein the liquid crystal molecules are rod-like liquid crystal molecules oriented in cholesteric alignment.
An optical compensatory sheet comprising a transparent support and an optically anisotropic layer formed from liquid crystal molecules, wherein three principal refractive indices of the optically anisotropic layer are different from each other, and wherein the liquid crystal molecules are rod-like liquid crystal molecules represented by the formula (II):
- in which X11 is CR11 or N where R11 is hydrogen, a halogen atom, an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms;
- X12 is CR12 or N where R12 is hydrogen, a halogen atom, an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms;
- each of L11 and L12 independently is a single bond or a divalent linking group, selected from the group consisting of —O—, —CO—, —S—, and —NH—, an alkylene group, an alkenylene group, an alkynylene group, an arylene group and a combination thereof;
- L13 is a single bond, —O—CO— or —NH—CO—;
- each of Q11 and Q12 is independently a polymerizable group;
- and each of the benzene rings A and B may have a substituent group selected from the group consisting of a halogen atom, an alkyl group having 1 to 12 carbon atoms, a halogen-substituted alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an acyl group having 2 to 13 carbon atoms, an alkylamino group having 1 to 12 carbon atoms and an acyloxy group having 2 to 13 carbon atoms.
An optical compensatory sheet comprising a transparent support and an optically anisotropic layer formed from liquid crystal molecules, wherein three principal refractive indices of the optically anisotropic layer are different from each other, and wherein the liquid crystal molecules are rod-like liquid crystal molecules which are aligned at an average inclined angle of less than 5°.
A process for the preparation of an optical compensatory sheet, comprising the steps in order of coating a transparent support with rod-like liquid crystal molecules having a benzene ring and a double bond conjugated with the benzene ring;
- orienting the rod-like liquid crystal molecules in cholesteric alignment at an average inclined angle of less than 5°;
- and exposing the layer to polarized light.
Dependencies are inferred from the claim text.