Cover window including anti-pollution layer at opening and display device including the same

Patent metadata

Field	Value
Publication number	US-11428967-B2
Application number	US-201916565644-A
Country	US
Kind code	B2
Filing date	Sep 10, 2019
Priority date	Oct 10, 2018
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

A cover window of a display device includes: a transparent layer; a light blocking layer disposed on the transparent layer, the light blocking layer defining an opening therein, the opening exposing a portion of the transparent layer which corresponds to a sensor of the display device; and an anti-pollution layer disposed corresponding to the portion of the transparent layer which corresponds to the sensor of the display device and is exposed by the opening. The anti-pollution layer has a surface energy lower than each of a surface energy of the transparent layer and a surface energy of the light blocking layer.

First claim

What is claimed is:

1. A cover window of a display device, comprising:
a transparent layer;
a light blocking layer disposed on the transparent layer, the light blocking layer defining an opening therein which corresponds to a light sensor of the display device and exposes a portion of the transparent layer to outside the light blocking layer to define an exposed portion of the transparent layer;
the light blocking layer and the exposed portion of the transparent layer defining a recess which corresponds to the light sensor of the display device; and
an anti-pollution layer in the recess, the anti-pollution layer between the light sensor of the display device and the exposed portion of the transparent layer,
wherein the anti-pollution layer has a surface energy lower than each of a surface energy of the transparent layer and a surface energy of the light blocking layer.

2. The cover window of claim 1 , wherein the anti-pollution layer is disposed in the opening and extends from the opening to be disposed on a portion of the light blocking layer which is adjacent to the opening.

3. The cover window of claim 1 , wherein the anti-pollution layer is disposed in the opening and extends to have a planar area larger than a planar area of the opening.

4. The cover window of claim 1 , wherein the surface energy of the anti-pollution layer is about 40 dynes per centimeter or less.

5. The cover window of claim 1 , wherein the surface energy of the anti-pollution layer is about 20 dynes/cm or less.

6. The cover window of claim 1 , wherein the anti-pollution layer which is in the recess which corresponds to the light sensor of the display device has a water contact angle of about 90 degrees or more.

7. The cover window of claim 1 , wherein the anti-pollution layer which is in the recess which corresponds to the light sensor of the display device has a hexadecane contact angle of about 25 degrees or more.

8. The cover window of claim 1 , wherein the anti-pollution layer which is in the recess which corresponds to the light sensor of the display device includes a fluorine material.

9. The cover window of claim 8 , wherein the fluorine material includes at least one of perfluoropolyether, polytetrafluoroethylene, fluorinated ethylene propylene and a perfluoroalkyl vinyl ether copolymer.

10. The cover window of claim 1 , wherein the anti-pollution layer further includes an adhesion improving layer which improves adhesion of the anti-pollution layer to the light blocking layer, the adhesion improving layer disposed corresponding to the exposed portion of the transparent layer.

11. The cover window of claim 10 , wherein the adhesion improving layer includes SiO 2 .

12. The cover window of claim 1 , wherein the anti-pollution layer has a protrusion pattern on a surface of the anti-pollution layer which is opposite to the transparent layer.

13. The cover window of claim 1 , further comprising a first protective film removably disposable on a surface of the anti-pollution layer which is opposite to the transparent layer.

14. The cover window of claim 13 , wherein the first protective film and the anti-pollution layer are removably attached to each other using a first adhesive.

15. The cover window of claim 13 , further comprising a second protective film removably attachable to a surface of the first protective film which is opposite to the transparent layer,
wherein the first protective film and the second protective film are removably attached to each other using a second adhesive.

16. The cover window of claim 15 , wherein the second adhesive seals the first protective film on the anti-pollution layer.

17. The cover window of claim 1 , wherein the anti-pollution layer is disposed in the opening to be spaced apart from side surfaces of the light blocking layer which define the opening therein.

18. A display device comprising:
a display panel;
a light receiving sensor; and
a cover window disposed overlapping the display panel and the light receiving sensor,
wherein the cover window comprises:
a transparent layer;
a first light blocking layer disposed between the transparent layer and the display panel, the first light blocking layer defining an opening therein which corresponds to the light receiving sensor of the display device and exposes a portion of the transparent layer to outside the light blocking layer to define an exposed portion of the transparent layer;
the first light blocking layer and the exposed portion of the transparent layer defining a recess which corresponds to the light receiving sensor of the display device; and
an anti-pollution layer in the recess, the anti-pollution layer disposed between the first light blocking layer and the display panel and between the light receiving sensor of the display device and the exposed portion of the transparent layer,
wherein the anti-pollution layer has a surface energy lower than each of a surface energy of the transparent layer and a surface energy of the light blocking layer.

19. The display device of claim 18 , wherein
the light receiving sensor to which the exposed portion of the transparent layer corresponds includes an infrared sensor, and
the cover window further includes a second light blocking layer including a semi-transmissive material layer disposed between the first light blocking layer and the anti-pollution layer, the second light blocking layer corresponding to the exposed portion of the transparent layer.

20. The display device of claim 18 , wherein
the opening defined by the first light blocking layer corresponds to an image display area of the display panel, and
the light receiving sensor overlaps the opening corresponding to the image display area, in a top plan view.

Assignees

• Samsung Display Co Ltd

Inventors

• Sung Sujin

Classifications

• H10K59/871

  Self-supporting sealing arrangements · CPC title

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• B32B2307/412

  Transparent · CPC title

• B32B7/02

  Physical, chemical or physicochemical properties · CPC title