LIQUID CRYSTAL ALIGNMENT LAYER AND LIQUID CRYSTAL DISPLAY ELEMENT

PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent for giving a liquid crystal alignment layer that maintains good liquid crystal aligning property even when the element is continuously driven for a long time, and suppresses reduction in a voltage retention rate and increase in a resid...

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Bibliographische Detailangaben
Hauptverfasser:	ISAYAMA JUN, HAYASHI EIJI, AKIIKE TOSHIYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent for giving a liquid crystal alignment layer that maintains good liquid crystal aligning property even when the element is continuously driven for a long time, and suppresses reduction in a voltage retention rate and increase in a residual DC voltage. SOLUTION: The liquid crystal aligning agent contains at least one kind of polymer selected from the group consisting of polyamic acids obtained by reacting a tetracarboxylic acid dianhydride with a diamine containing a compound expressed by formula (A), and polyimide produced by dehydrating and ring-closing the polyamic acids. In formula (A), RIand RIIeach represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms; X represents a single bond, a methylene group, an alkylene group having 2 to 30 carbon atoms, -O-, -CO-, -COO-, -NH-, -NHCO- or -CONH-; and n is an integer of 1 to 4. COPYRIGHT: (C)2011,JPO&INPIT