LIQUID CRYSTAL ALIGNING AGENTS FOR FORMING LIQUID CRYSTAL ALIGNMENT LAYER FOR PHOTOALIGNMENT LIQUID CRYSTAL ALIGNMENT LAYERS AND LIQUID CRYSTAL DISPLAY DEVICES USING THE SAME

• Main Author: IZAWA KEISUKE
• Format: Patent
• Language: English; Korean
• Published: 21.12.2016
• Subjects: ADHESIVES; CHEMISTRY; 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; DYES; FREQUENCY-CHANGING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The present invention relates to a liquid crystal aligning agent or photo-alignment, which comprises at least one polymer selected from the group consisting of polyamic acid, polyamic acid ester and polyimides obtained by imidization thereof, wherein at least one of the starting monomers of the polymer has a photo-isomerizable structure and the diamine as a starting material for the polymer comprises at least one compound represented by chemical formula (1). A liquid crystal display device having a liquid crystal alignment layer formed by using the liquid crystal aligning agent according to the present invention causes no degradation of display quality even when it is exposed to strong light for a long time. In chemical formula (1), n independently represents a C1-C6 alkylene. 본 발명은 폴리아믹산, 폴리아믹산에스테르 및 이들을 이미드화하여 얻어지는 폴리이미드로 이루어지는 군에서 선택되는 적어도 1 개의 중합체를 함유하고, 상기 중합체의 원료 모노머의 적어도 1 개가 광 이성화 구조를 가지며, 또한, 상기 중합체의 원료인 디아민이 하기 식 (1) 로 나타내는 화합물의 적어도 1 개를 함유하는, 광 배향용 액정 배향제에 관한 것이다. 본 발명의 액정 배향제를 사용하여 형성한 액정 배향막을 갖는 액정 표시 소자는 장시간 강한 광에 노출되어도 표시 품위가 저하되지 않는다는 우수한 특징을 갖는다.n 은 독립적으로 탄소수 1∼6 의 알킬렌이다.