Polarizing film, method of manufacturing polarizing film, and display apparatus including polarizing film manufactured using the same

Patent metadata

Field	Value
Publication number	US-12552117-B2
Application number	US-202217589744-A
Country	US
Kind code	B2
Filing date	Jan 31, 2022
Priority date	Apr 5, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A polarizing film includes: a polarizing layer; a coating layer at one side of the polarizing layer and to absorb wavelengths in an ultraviolet ray region; and a phase retardation layer at another side of the polarizing layer, wherein the coating layer has a thickness of about 15 nm to about 5 μm.

First claim

What is claimed is:

1 . A display apparatus comprising:
a display panel comprising a display element; an input detection layer on the display panel; a polarizing film on the input detection layer; a window layer on the polarizing film; a first adhesive layer between the input detection layer and the polarizing film; and a second adhesive layer between the polarizing film and the window layer, wherein the polarizing film comprises: a polarizing layer; a coating layer directly on one side of the polarizing layer and defining an outer surface of the polarizing film, the coating layer being to absorb wavelengths in an ultraviolet ray region; a protective layer directly on another side of the polarizing layer and comprising an organic material; a phase retardation layer at one side of the protective layer opposite to the polarizing layer; and an adhesive film directly between the protective layer and the phase retardation layer, and including a pressure-sensitive adhesive, wherein the coating layer and the polarizing layer are separate components, and during a manufacturing process, the coating layer is formed by being directly applied on the polarizing layer after the polarizing layer has been formed, wherein the coating layer includes a poly vinyl alcohol-based resin and an ultraviolet-ray-absorbing monomer, wherein the coating layer has a thickness of about 15 nm to about 1 μm, wherein the second adhesive layer is a pressure-sensitive adhesive directly between the coating layer and the window layer, and wherein a transmittance of the coating layer in a wavelength area between about 300 nm to about 400 nm is less than 50%.

2 . The display apparatus of claim 1 , wherein only the coating layer is between the second adhesive layer and the polarizing layer.

3 . The display apparatus of claim 1 , wherein the ultraviolet-ray-absorbing monomer comprises at least one selected from a benzotriazole-based monomer, a triphenyltriazine-based monomer, and a benzophenone-based monomer.

4 . The display apparatus of claim 1 , wherein the coating layer comprises about 0.1 to about 20 parts by weight of a sum of the poly vinyl alcohol-based resin and the ultraviolet-ray-absorbing monomer based on 100 parts by weight of a coating layer composition for forming the coating layer.

5 . The display apparatus of claim 1 , wherein the window layer defines an outer surface of the display apparatus, and the second adhesive layer is directly between the coating layer and the window layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Beon Beonghun
• Lee Dukjin
• Jung Woosuk
• Hong Hyosung

Classifications

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• B32B2255/26

  Polymeric coating · CPC title