LAMINATE AND ORGANIC EL DISPLAY DEVICE

• Main Authors: MORIMOTO KENSUKE, HATANAKA NOBUYUKI, NADA TAKAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 13.06.2024
• Subjects: ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING

To provide a laminate which can suppress generation of a hue at the time of black display of a display device, even when being exposed to humid and hot environment.SOLUTION: A laminate has a light absorption anisotropic layer obtained from a liquid crystal composition, a bonding layer and a polarizer, wherein the polarizer contains a polyvinyl alcohol-based resin, iodine and boron. The light absorption anisotropic layer contains one or more kinds of dichroic dyes and satisfies the following expressions (1) to (3). The liquid crystal composition contains a liquid crystalline compound and a polymerization initiator, and the polymerization initiator is at least one of an oxime ester compound and an α-hydroxyketone compound. Expression (1): Az>(Ax+Ay)/2. Expression (2): 0.001≤Ax≤0.10. Expression (3): Ax(z=60°)/Ax≥2.SELECTED DRAWING: Figure 1 【課題】湿熱環境下に曝された場合にも、表示装置の黒表示時に色味が生じることを抑制することができる積層体を提供する。【解決手段】積層体は、液晶組成物から得られる光吸収異方性層、貼合層、及び偏光子を有し、偏光子はポリビニルアルコール系樹脂、ヨウ素、及びホウ素を含む。光吸収異方性層は、１種以上の二色性色素を含み、かつ、下記式（１）～（３）の関係を満たす。液晶組成物は、液晶性化合物及び重合開始剤を含み、重合開始剤は、オキシムエステル化合物及びα－ヒドロキシケトン化合物のうちの少なくとも一方である。Ａｚ＞（Ａｘ＋Ａｙ）／２・・・（１）０．００１≦Ａｘ≦０．１０・・・（２）Ａｘ（ｚ＝６０°）／Ａｘ≧２・・・（３）【選択図】図１