Polarizing plate and display apparatus

Patent metadata

Field	Value
Publication number	US-9857625-B2
Application number	US-201415103662-A
Country	US
Kind code	B2
Filing date	Dec 5, 2014
Priority date	Dec 12, 2013
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A polarizing plate and a display apparatus including the polarizing plate are provided. The polarizing plate includes a polarizer, a first protective film disposed on one surface of the polarizer with a first adhesive layer having a thickness less than 2.0 μm being interposed, and a second protective film disposed on the other surface with a second adhesive layer having a thickness less than or equal to 2.0 μm being interposed, the second protective film being a protective film to be arranged on a side of a cell for display relative to the first protective film in arrangement of the polarizing plate on the cell for display, and the first adhesive layer being smaller in thickness than the second adhesive layer.

First claim

The invention claimed is:

1. A polarizing plate comprising:
a polarizer having a first surface and an opposing second surface;
a first protective film disposed on the first surface of the polarizer with a first adhesive layer having a thickness less than 2.0 μm being interposed; and
a second protective film disposed on the second surface of the polarizer with a second adhesive layer having a thickness less than or equal to 2.0 μm being interposed,
the second protective film being a protective film to be arranged on a side of a cell for display relative to the first protective film in arrangement of the polarizing plate on the cell for display, and
the first adhesive layer being smaller in thickness than the second adhesive layer and a difference in thickness between the second adhesive layer and the first adhesive layer being greater than or equal to 0.3 μm.

2. The polarizing plate according to claim 1 , wherein the first and second adhesive layers are each a layer of a cured product of a photo-curable adhesive.

3. The polarizing plate according to claim 1 , wherein the first adhesive layer has a thickness less than or equal to 0.7 μm.

4. A display apparatus comprising:
the cell for display; and
the polarizing plate according to claim 1 arranged on at least one surface of the cell for display.

5. The polarizing plate according to claim 1 , wherein the polarizer has a thickness less than or equal to 10 μm.

6. The polarizing plate according to claim 1 , the polarizing plate further comprising a pressure-sensitive adhesive layer for bonding to the cell for display, wherein the second protective film comprises an outer surface and the pressure-sensitive adhesive layer is laminated on the outer surface of the second protective film.

Assignees

• Sumitomo Chemical Co

Inventors

• Kunai Yuichiro

Classifications

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02B5/3033

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title

• B32B2551/00

  Optical elements · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title