OPTICAL ANISOTROPIC MATERIAL AND LIQUID CRYSTAL DISPLAY

• Main Authors: MIYAGAWA NAGAHISA, HIRAI KICHIJI, NARA KAZUMI, OTSUKI DAISUKE, TANABE MAYUMI
• Format: Patent
• Language: English; Japanese
• Published: 09.07.2015
• 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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; 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 an optical anisotropic material having a negative uniaxial optical retardation film and a positive uniaxial retardation film, excellent in heat resistance and sputtering resistance.SOLUTION: A positive uniaxial retardation film is composed by combining bifunctional polymerizable liquid crystal compounds, and a negative uniaxial retardation film is composed by combining a bifunctional polymerizable liquid crystal compound and an optical active compound having a polymerizable binaphthol portion. Additional thermal cure processing (post-curing) is performed after the negative uniaxial retardation film is photocured. The additional thermal cure processing temperature is set to be 220°C or higher and 250°C or lower when a glass-transition temperature is 85°C or higher and 115°C or lower after the negative uniaxial retardation film is cured, and the additional thermal cure processing temperature is set to be 200°C or higher and 250°C or lower when the glass-transition temperature is higher than 115°C. 【課題】耐熱性および耐スパッタリング性に優れた、負の一軸性光学位相差膜および正の一軸性位相差膜を有する光学異方体の提供。【解決手段】正の一軸性位相差膜を二官能の重合性液晶化合物の組み合わせで構成し、負の一軸性位相差膜を二官能の重合性液晶化合物と重合可能なビナフトール部位を有する光学活性化合物との組み合わせで構成し、さらに、負の一軸性位相差膜の光硬化後に追加の熱硬化処理（後硬化）を行い、負の一軸性位相差膜の硬化後におけるガラス転移温度が８５℃以上、１１５℃以下である場合、追加の熱硬化処理温度を２２０℃以上、２５０℃以下とし、該ガラス転移温度が１１５℃より高い場合は、追加の熱硬化処理温度を２００℃以上、２５０℃以下とする。【選択図】 なし