Polarizing plate, image display and liquid crystal display device

A technology for image display devices and polarizers, applied in polarizing elements, instruments, optics, etc., can solve problems such as air bubbles, and achieve excellent curl resistance

Active Publication Date: 2016-11-23
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If curling occurs in this way, there is a problem that when bonding to an adherend such as a liquid crystal cell, it is easy to cause bonding defects such as air bubbles

Method used

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  • Polarizing plate, image display and liquid crystal display device
  • Polarizing plate, image display and liquid crystal display device
  • Polarizing plate, image display and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0043] As the first embodiment of the polarizing plate of the present invention, a polarizing plate provided with a polarizer, a protective film, and a peeling film in this order is mentioned. In addition, after bonding a polarizing plate to an adherend, the release film is usually peeled off from the polarizing plate.

[0044] figure 1 A schematic cross-sectional view of a polarizing plate 100 as a first embodiment of the polarizing plate of the present invention is shown.

[0045] The polarizing plate 100 is provided with the polarizer 10, the protective film 20, and the peeling film 30 in this order.

[0046] Hereinafter, a polarizer, a protective film, and a peeling film are demonstrated.

[0047]

[0048] The polarizer may be any member as long as it has a function of converting light into specific linearly polarized light. For example, an absorption polarizer, a reflective polarizer, or the like can be used.

[0049] As the absorption-type polarizer, an iodine-based...

no. 2 Embodiment approach 〕

[0086] As a second embodiment of the polarizing plate of the present invention, a polarizing plate provided with a polarizer, a protective film, an adhesive layer, and a release film in this order is mentioned. It is preferable that the polarizing plate of the present invention is provided with an adhesive layer between the protective film and the release film, as in the second embodiment, because the release film is stably adhered. Moreover, after bonding a polarizing plate to a to-be-adhered body normally, a peeling film and an adhesive layer are peeled off from a polarizing plate.

[0087] figure 2 A schematic cross-sectional view of a polarizing plate 110 as a second embodiment of the polarizing plate of the present invention is shown.

[0088] The polarizing plate 110 is provided with the polarizer 10, the protective film 20, the adhesive layer 40, and the release film 30 in this order.

[0089] About a polarizer, a protective film, and a peeling film, it is as above-m...

no. 3 Embodiment approach 〕

[0099] A third embodiment of the polarizing plate of the present invention includes a polarizing plate provided with a polarizer, a protective film, a hard coat layer, an adhesive layer, and a release film in this order. Moreover, after bonding a polarizing plate to a to-be-adhered body normally, a peeling film and an adhesive layer are peeled off from a polarizing plate.

[0100] image 3 A schematic cross-sectional view of a polarizing plate 120 which is a third embodiment of the polarizing plate of the present invention is shown.

[0101] Polarizing plate 120 includes polarizer 10 , protective film 20 , hard coat layer 50 , adhesive layer 40 , and release film 30 in this order.

[0102] The polarizer, protective film, adhesive layer, and release film are as described above.

[0103] Hereinafter, the hard coat layer will be described.

[0104]

[0105] The hard coat layer is a layer mainly used to impart physical strength to the polarizing plate.

[0106] The hard coat...

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Abstract

The purpose of the present invention is to provide a polarizing plate that does not easily curl due to environmental changes, and an image display and liquid crystal display device provided with the polarizing plate. This polarizing plate is provided with, a polarizing element, a protective film and a release film, in that order. The modulus of elasticity of the release film is at least 2.0 GPa. The thickness P (micrometer) of the polarizing element, the thickness Q (micrometer) of the protective film, and the thickness T (micrometer) of the release film satisfy formula (A). Formula(A): T>=(2.8*P-1.2*Q)+50

Description

technical field [0001] The invention relates to a polarizer, an image display device and a liquid crystal display device. Background technique [0002] Usually, a polarizer is manufactured using a polyvinyl-alcohol-type resin film. More specifically, a dichroic dye such as iodine or a dichroic dye is adsorbed and oriented on a polyvinyl alcohol-based resin film, and then uniaxially stretched to produce it. [0003] Since such a polarizer has poor mechanical strength, a polarizer protective film (protective film) such as TAC (a film made of saponified triacetyl cellulose) is bonded to the polarizer to be used as a polarizing plate. [0004] For example, Patent Document 1 discloses a polarizing plate including a polarizer and a single polarizing plate protective film (claim 1, paragraph [0171], etc.). [0005] Previous technical literature [0006] patent documents [0007] Patent Document 1: Japanese Patent Laid-Open No. 2012-014148 Contents of the invention [0008] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335
CPCG02B5/3016G02B5/3033G02F1/133528G02F2201/50G02F2201/54
Inventor 保田浩太郎
Owner FUJIFILM CORP
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