POLARIZING FILM AND IMAGE DISPLAY DEVICE

• Main Authors: KANNO RYO, FUKUYAMA YOSHITO, KATAYAMA KISUKE
• Format: Patent
• Language: Chinese; English
• Published: 04.11.2022
• Subjects: ADVERTISING; BASIC ELECTRIC ELEMENTS; CRYPTOGRAPHY; 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; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; 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; SEALS; SEMICONDUCTOR DEVICES; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING

Provided is a polarizing film capable of sufficiently suppressing the transmission of iodine contained in a polarizer to the outside in a high-temperature and humid environment. This polarizing film is provided with a polarizer and a resin layer containing a polymer, and is characterized in that at least one of the following requirements (i) to (v) is satisfied. (i) The tensile modulus E1 of the resin layer is 1 * 108 Pa or more; (ii) the tensile modulus E2 of the resin layer is 1 * 108 Pa or more; (iii) the linear expansion coefficient [alpha] 1 of the resin layer is 400 * 10-6/K or less; (iv) the linear expansion coefficient [alpha] 2 of the resin layer is 300 * 10-6/K or less; (v) The dipole moment D of the monomer for forming the polymer is 2 Debye or less. 本发明提供能够在高温多湿环境中充分地抑制起偏镜中所含的碘向外部透过的偏振膜。本发明的偏振膜具备：起偏镜、和包含聚合物的树脂层，其中，下述的要件(i)～(v)中的至少一个要件成立。(i)树脂层的拉伸模量E1为1×108Pa以上；(ii)树脂层的拉伸模量E2为1×108Pa以上；(iii)树脂层的线膨胀系数α1为400×10-6/K以下；(iv)树脂层的线膨胀系数α2为300×10-6/K以下；(v)用于形成聚合物的单体的偶极矩D为2德拜以下。