LIQUID CRYSTAL ALIGNING AGENT AND IN-PLANE SWITCHING MODE LIQUID CRYSTAL DISPLAY ELEMENT

• Main Authors: HAYASHI EIJI, YOSHIO KOHEI
• Format: Patent
• Language: English
• Published: 04.10.2007
• Subjects: 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

PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent excellent in printing property for an in-plane switching mode liquid crystal display element. SOLUTION: The liquid crystal aligning agent for the in-plane switching mode liquid crystal display element contains a soluble polyimide having an imide structure expressed by formula (1), obtained by dehydration cyclization of polyamic acid obtained by the reaction of a tetracarboxylic acid dianhydride and diamine, wherein the imidization rate of the soluble polyimide ranges from 60 to 95%. In formula (1), R1represents a tetravalent organic group and R2represents a divalent organic group. COPYRIGHT: (C)2008,JPO&INPIT