POLARIZING PLATE AND OPTICAL DISPLAY DEVICE INCLUDING THE SAME

• Main Authors: LEE DAE GYU, LEE EUN HWA, HONG HYUN AH, CHO JANG HYUN, SEO JIN AH
• Format: Patent
• Language: English; Japanese
• Published: 01.05.2023
• Subjects: 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; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

To provide a polarizing plate that improves a light-dark ratio and/or brightness even when the polarizing plate does not include an optical pattern or a pattern layer including the optical pattern.SOLUTION: A polarizing plate includes a polarizer, and an optical functional layer and a first protective layer laminated on a light emission surface of the polarizer. The optical functional layer includes a resin layer and acicular microparticles. The resin layer is formed of a composition including an active energy-ray curable resin. The acicular microparticles are oriented in an in-plane direction of the optical functional layer, and when a light absorption axis of the polarizer is defined as 0°, an average value of an orientation angle in the longitudinal direction of the acicular microparticles to the light absorption axis of the polarizer is from -10° to +10°, and a standard deviation of the orientation angle is 15° or less.SELECTED DRAWING: Figure 1 【課題】光学パターン又は光学パターンを含むパターン層を含まない場合にも、明暗比及び／又は輝度を改善する偏光板を提供する。【解決手段】偏光子、及び偏光子の光出射面に積層された光学機能性層及び第１保護層、を含み、光学機能性層は、樹脂層、及び針状形マイクロ粒子、を含み、樹脂層は、活性エネルギー線硬化型樹脂を含む組成物で形成され、光学機能性層の面内方向において、針状形マイクロ粒子は配向されており、偏光子の光吸収軸を０゜としたとき、偏光子の光吸収軸に対する針状形マイクロ粒子の長手方向の配向角度の平均値は－１０゜から＋１０゜で、配向角度の標準偏差は１５゜以下である偏光板を構成する。【選択図】図１