Optical laminate and image display device using the same

• Main Authors: TAKASE YUTA, MORISAKI MAYUMI, MURAKAMI RYOICHI
• Format: Patent
• Language: English; Korean
• Published: 24.06.2024
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING

본 발명은, 프레임상 표시 결함이 억제된 광학 적층체를 제공하는 것이다. 본 발명의 실시형태에 따른 광학 적층체는, 전면판과 점착제층과 편광판과 위상차층을 이 순서대로 포함한다. 편광판은, 편광자와 편광자의 점착제층 측에 배치된 보호층을 포함한다. 점착제층은, 흡수 극대 파장이 200nm~300nm인 화합물을 포함하는 광경화성 점착제로 구성되어 있다. 편광자는, 단체 투과율이 43.3% 미만이고, 파장 210nm에서의 두께 1㎛당의 직교 흡광도(A210)가 0.60 이하이다. The invention provides an optical laminate and an image display device using the same. [Problem] To provide an optical laminate in which frame-shaped display defects are suppressed. [Solution] 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 an absorption maximum wavelength of 200-300 nm. The polarizer has a single transmittance of less than 43.3% and an orthogonal absorbance A210 of 0.60 or less at an average thickness of 1 [mu] m at a wavelength of 210 nm.