Window film and display including the same

Patent metadata

Field	Value
Publication number	US-10508218-B2
Application number	US-201514830708-A
Country	US
Kind code	B2
Filing date	Aug 19, 2015
Priority date	Aug 21, 2014
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A window film includes a base layer and a coating layer formed on the base layer. The coating layer contains a silicone resin, and the window film contains a dye having a maximum absorption wavelength of about 500 nm to about 650 nm. A display includes the window film, and may be a flexible display.

First claim

What is claimed is:

1. A window film, comprising:
a base layer, the base layer being a polyimide resin film having a yellowness index of 5 or greater; and
a coating layer on the base layer, the coating layer comprising a silicone resin containing a UV curable group,
the window film containing a dye having a maximum absorption wavelength of about 500 nm to about 650 nm, the dye comprising at least one of a porphyrin dye, an arylmethane dye, a squarylium dye, an azomethine dye, an oxonol dye, an azo dye, an arylidene dye, a xanthene dye, a vanadium dye, or a merocyanine dye,
wherein the window film has an overall yellowness index of about 4.0 or lower, a pencil hardness measured on the coating layer of the window film is about 6H or higher, and a thickness ratio of the base layer to the coating layer is about 1:1 to about 5:1.

2. The window film according to claim 1 , wherein the dye has a maximum absorption wavelength of about 550 nm to about 620 nm.

3. The window film according to claim 1 , wherein the dye is contained in at least one of the base layer or the coating layer.

4. The window film according to claim 1 , further comprising an adhesive layer on the base layer.

5. The window film according to claim 4 , wherein the dye is contained in the adhesive layer.

6. The window film according to claim 1 , wherein the coating layer has a pencil hardness of about 6H to about 9H.

7. The window film according to claim 1 , wherein the dye is present in an amount of about 0.001 wt % to about 5 wt % based on 100 wt % of the coating layer.

8. The window film according to claim 1 , wherein the coating layer is formed from a composition for a coating layer comprising the dye, the silicone resin, a curable monomer and an initiator.

9. The window film according to claim 8 , wherein the curable monomer comprises at least one of an epoxy monomer, an acid anhydride monomer, or an oxetane monomer.

10. A display, comprising the window film according to claim 1 .

11. The display according to claim 10 , wherein the display is a flexible display.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Lee Jung Hyo
• Kang Kyoung Ku
• Kim Sung Han
• Kim Joo Hui
• Park Si Kyun
• Sung Nak Hyun
• Choi Jin Hee

Classifications

• B32B2369/00

  Polycarbonates · CPC title

• C08K5/151

  having one oxygen atom in the ring · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B27/20 Primary

  using fillers, pigments, thixotroping agents · CPC title

• B32B2379/08

  Polyimides · CPC title