PRODUCTION METHOD FOR SUBSTRATE PROVIDED WITH LIQUID CRYSTAL ALIGNMENT FILM FOR HORIZONTAL ELECTRIC FIELD-DRIVEN LIQUID CRYSTAL DISPLAY ELEMENT

• Main Authors: KATAYAMA MASAAKI, KAWATSUKI NOBUHIRO, KONDO MIZUHO, NEGI TAKAYUKI
• Format: Patent
• Language: English; Korean
• Published: 11.02.2016
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED 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

본 발명은, 고효율로 배향 제어능이 부여되고, 노광 특성이 우수하며, 또한 단부의 직선성이 높고, 단부의 팽창이 작은 액정 배향막을 갖는 횡전계 구동형 액정 표시 소자를 제공한다. 본 발명은,［I］(A) 소정의 온도 범위에서 액정성을 발현하는 감광성의 측사슬형 고분자 및 (B) 상기 측사슬형 고분자의 양용매 및 빈용매의 쌍방을 가지며 또한 비점 180 ℃ 이상의 양용매를 10 질량％ 이상 갖는 유기 용매로서, 양용매가, 비점이 100 ∼ 230 ℃ 이고 표면 장력이 41.0 dyn/cm 보다 작은 용매에서 선택되는 것을 함유하고, 및/또는 빈용매가, 프로필렌글리콜모노부틸에테르를 함유하는 유기 용매를 함유하는 중합체 조성물을, 횡전계 구동용의 도전막을 갖는 기판 상에 도포하여 도포막을 형성하고 ； ［II］얻어진 도포막에 편광된 자외선을 조사하고 ； ［III］얻어진 도포막을 가열함으로써 배향 제어능이 부여된 횡전계 구동형 액정 표시 소자용 액정 배향막을 얻는, 상기 액정 배향막을 갖는 기판의 제조 방법에 의해, 상기 과제를 해결한다. The present invention provides a horizontal electric field-driven liquid crystal display element provided with a liquid crystal alignment film with which the ability to control alignment with high efficiency is imparted, and which exhibits excellent burn-in properties, high edge linearity, and little edge bulging. The problem to be solved by the present invention is addressed by employing a production method for a substrate provided with a liquid crystal alignment film, said method wherein: [I] a coating film is formed by applying, to the top of a substrate provided with a horizontal electric field-driving conductive film, a polymer composition including an organic solvent which includes (A) a photosensitive side-chain-type polymer that becomes liquid crystal at a prescribed temperature range, and (B) both a good solvent and a poor solvent of the side-chain-type polymer, and which includes at least 10 mass% of a good solvent having a boiling point of at least 180 C, said organic solvent wherein the good solvent includes a substance selected from solvents having a boiling point of 100-230 C and a surface tension lower than 41.0 dyn/cm, and/or the poor solvent includes a propylene glycol monobutyl ether; [II] the resultant coating film is irradiated with polarized ultraviolet light; and [III] the resultant coating film is heated to obtain the liquid crystal alignment film for the horizontal electric field-driven liquid crystal display element, said film imparting the ability to control alignment.