OPTICAL LAMINATE AND IMAGE DISPLAY DEVICE USING SAME

• Main Authors: TAKASE YUTA, MURAKAMI RYOICHI, UWADA KAZUKI
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2023
• 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

The invention relates to an optical laminate and an image display device using the same. Provided is an optical laminate in which frame-shaped display defects are suppressed. An optical laminate according to an embodiment of the present invention has a front panel, an adhesive layer, a polarizing plate, and a phase difference layer in this order. The polarizing plate includes a polarizer and a protective layer disposed on the adhesive layer side of the polarizer. The pressure-sensitive adhesive layer is configured from a photocurable pressure-sensitive adhesive containing a compound having a maximum absorption wavelength of 200-300 nm. The single-body transmittance of the polarizer is 43.3% or more. Alternatively, the moisture permeability of the protective layer is 100 g/cm2.24 hr or less. 本发明涉及光学层叠体以及使用了该光学层叠体的图像显示装置。本发明提供抑制了框状显示缺陷的光学层叠体。本发明实施方式的光学层叠体依次具有前面板、粘合剂层、偏振片、及相位差层。偏振片包含起偏器和配置于起偏器的粘合剂层侧的保护层。粘合剂层由包含最大吸收波长为200nm～300nm的化合物的光固化性粘合剂构成。起偏器的单体透过率为43.3％以上。或者保护层的透湿度为100g/cm2·24hr以下。