Thin polarizer and image display apparatus using the same

Abstract

A polarizing plate provided with a pressure-sensitive adhesive layer on at least one side of the polarizer imparts good durability even in a high-temperature environment, and can laminate a polymer film thereon without troublesome workability. The polarizing plate with pressure-sensitive adhesive is laminated with a polymer film such as a phase difference plate to obtain a thinner composite polarizing plate, which is applied to an image display device. A polarizing plate (10) in which a pressure-sensitive adhesive layer (2) is provided on at least one side of a polarizer (1), wherein the pressure-sensitive adhesive layer (2) exhibits a storage capacity of 0.15-1 MPa at a temperature range of 23-80°C Elastic modulus of the pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer (2) exhibiting a high storage elastic modulus suppresses dimensional changes caused by expansion and contraction of the polarizer (1) in a high-temperature environment. A polymer film (6) such as a phase difference plate is arranged on the outside of the pressure-sensitive adhesive layer (2) to make a composite polarizer (15, 16), and it is combined with an image display element such as a liquid crystal cell (20) to obtain an image display device.

Description

technical field [0001] The present invention relates to a polarizing plate used in an image display device such as a liquid crystal display device, and an image display device including the polarizing plate. The polarizing plate of the present invention has a thin and lightweight structure and is excellent in durability in a high-temperature environment, so it is particularly useful in various image display devices for mobile applications in which the module itself is intended to be thinner, lighter, and more durable. Background technique [0002] Liquid crystal display devices have been used in desktop computers, electronic timepieces, etc., but in recent years, their applications are rapidly expanding. That is, from mobile devices such as mobile phones to large televisions, liquid crystal display devices have begun to be used regardless of the screen size. In addition, in addition to liquid crystal display devices, organic electroluminescence (organic EL) display devices ...

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