Polarizing plate and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-2016209565-A1
Application number	US-201615000256-A
Country	US
Kind code	A1
Filing date	Jan 19, 2016
Priority date	Jan 19, 2015
Publication date	Jul 21, 2016
Grant date	—

Abstract

There is provided a polarizing plate including a transparent support, a polarizer, and a low-moisture permeable layer in this order, wherein a thickness of the polarizer is 15 μm or less, a film thickness of the low-moisture permeable layer is greater than 5 μm and equal to 30 μm or less, the low-moisture permeable layer is formed from a composition containing at least one of a compound having a cyclic aliphatic hydrocarbon group and two or more ethylenically unsaturated double bond groups in its molecule, and a compound having a fluorene ring and two or more ethylenically unsaturated double bond group in its molecule, and a polymerization initiator, and the polarizer and the low-moisture permeable layer are laminated directly or through an adhesive layer.

First claim

What is claimed is:

1 . A polarizing plate comprising a transparent support, a polarizer, and a low-moisture permeable layer in this order,
wherein a thickness of the polarizer is 15 μm or less, a film thickness of the low-moisture permeable layer is greater than 5 μm and 30 μm or less, the low-moisture permeable layer is formed from a composition containing at least one of a compound having a cyclic aliphatic hydrocarbon group and two or more ethylenically unsaturated double bond groups in its molecule, and a compound having a fluorene ring and two or more ethylenically unsaturated double bond group in its molecule, and a polymerization initiator, and the polarizer and the low-moisture permeable layer are laminated directly or through an adhesive layer.

2 . The polarizing plate of claim 1 , wherein a hard coat layer is provided on a surface opposite to the polarizer of the low-moisture permeable layer.

3 . The polarizing plate of claim 1 , wherein the cyclic aliphatic hydrocarbon group is a group represented by the following Formula (I):

wherein L 1 and L 2 each independently represent a single bond or di- or higher-valent group, and
n represents an integer of 1 to 3.

4 . The polarizing plate of claim 1 , wherein the composition contains a rosin compound.

5 . The polarizing plate of claim 1 , wherein the transparent support contains a polymer selected from a cellulose acylate-based polymer, a polyester-based polymer, a (meth)acrylic polymer, and a cycloolefin-based polymer in an amount of 50% by mass or more in the transparent support.

6 . The polarizing plate of claim 1 , wherein a thickness of the transparent support is 35 μm.

7 . The polarizing plate of claim 1 , wherein a thickness of the polarizing plate is 80 μm or less.

8 . The polarizing plate of claim 1 , wherein the low-moisture permeable layer has an ultraviolet absorbability.

9 . A liquid crystal display device comprising:
a liquid crystal cell; and the polarizing plate of claim 1 which is disposed at a viewing side of the liquid crystal cell, wherein the low-moisture permeable layer of the polarizing plate is arranged at the viewing side.

Assignees

• Fujifilm Corp

Inventors

• Nakao Masato
• Hisakado Yoshiaki

Classifications

• G02B5/305 Primary

  including organic materials, e.g. polymeric layers · CPC title

• G02F1/133528

  Polarisers · CPC title

• C09K2323/035

  Ester polymer, e.g. polycarbonate, polyacrylate or polyester · CPC title