ELEKTROOPTISCHES LICHTSTEUERELEMENT, ELEKTROOPTISCHE ANZEIGE UND STEUERMEDIUM
申请人:Merck Patent GmbH
公开号:EP1561150B1
公开(公告)日:2007-01-03
COMPOUNDS FOR USE IN LIQUID CRYSTAL MEDIA
申请人:Merck Patent GmbH
公开号:EP1658350B1
公开(公告)日:2010-01-20
MESOGENIC COMPOUNDS, MEDIUM FOR ELECTRO-OPTICAL DISPLAYS AND ELECTRO-OPTICAL DISPLAY
申请人:Merck Patent GmbH
公开号:EP1658351B1
公开(公告)日:2009-10-28
OPTICALLY ANISOTROPIC SUBSTANCE
申请人:HIRAI YOSHIHARU
公开号:US20100297367A1
公开(公告)日:2010-11-25
Subject to be Solved The invention aims to provide a polyamic acid-type photo-alignment layer in a heating process only below approximately 140° C., and to provide an optically anisotropic substance in which various polymerizable liquid crystal compositions are uniformly oriented by use of the layer.
Means for Solving the Subject An optically anisotropic substance obtained by applying a polyamic acid varnish which is a composition including a polyamic acid having a divalent azobenzene group in the principal chain or its derivative, or a composition including a mixture of both this polyamic acid or its derivative and other polyamic acids or its derivative as a polymer component, to a supporting substrate, by drying the resultant layer at a temperature range of approximately 50° C. to approximately 140° C., by carrying out alignment treatment by irradiation of the layer with light, applying a polymerizable liquid crystal composition to a alignment layer formed by means of the treatment, and polymerizing the composition.
A compound represented by the formula (1) is provided. A polymerizable liquid crystal composition containing the compound can be controlled in birefringence and is excellent in stability of a liquid crystal phase. An anisotropic polymer excellent in uniformity of alignment is obtained by coating and polymerizing the composition on a supporting substrate. In the formula (1), at least one of R
a
represents a polymerizable group, A represents a ring group, Y and Z each represent a single bond or alkylene; in which —CH
2
— in the alkylene may be replaced by another group, and m and n each represent an integer of from 0 to 5.