Adhesive member, display device including the same and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11072727-B2
Application number	US-201715832521-A
Country	US
Kind code	B2
Filing date	Dec 5, 2017
Priority date	Jan 18, 2017
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

An adhesive member for a display device is disclosed. The adhesive member may include an adhesive film configured to roll along a rolling axis. The adhesive film may include an adhesive portion including a plurality of adhesive lines. The plurality of adhesive lines may not be orthogonal to the rolling axis.

First claim

What is claimed is:

1. A display device, comprising:
a display member configured to roll along a rolling axis;
an adhesive member disposed on the display member, the adhesive member comprising an adhesive portion comprising a plurality of adhesive lines; and
a protective member disposed on the adhesive member,
wherein the display device is an electronic display device,
wherein the plurality of adhesive lines are not orthogonal to the rolling axis,
wherein the display member is capable of displaying an image,
wherein the plurality of adhesive lines define an elastic portion that is between respective ones of the adhesive lines,
wherein the elastic portion comprises a silicon based adhesive,
wherein a difference between a refractive index of the adhesive portion and a refractive index of the elastic portion is less than 0.1,
wherein the adhesive portion comprises a first adhesive layer between a second lower adhesive layer and a second upper adhesive layer, the second lower adhesive layer and the second upper adhesive layer each having an adhesion greater than an adhesion of the first adhesive layer, and
wherein an elastic resilience of the first adhesive layer is greater than an elastic resilience of each of the second lower adhesive layer and the second upper adhesive layer.

2. The display device of claim 1 , wherein included angles between the plurality of adhesive lines and the rolling axis are in a range of 0 degrees to 30 degrees.

3. The display device of claim 1 , wherein an area of the adhesive portion is in a range of 10% to 80% of an area of the adhesive member.

4. The display device of claim 1 , wherein the adhesive portion comprises a pressure sensitive adhesive (PSA).

5. The display device of claim 1 , wherein a width of each of the plurality of adhesive lines is in a range of 10 micrometers (μm) to 200 μm.

6. The display device of claim 1 , wherein the elastic portion has a polygonal shape.

7. The display device of claim 6 , wherein the silicon based adhesive is an elastomer.

8. The display device of claim 1 , wherein each of the plurality of adhesive lines comprises:
a first adhesive line parallel with the rolling axis;
a second adhesive line that forms an acute angle with the rolling axis in a counterclockwise direction; and
a third adhesive line that forms an acute angle with the rolling axis in a clockwise direction, and
wherein the first adhesive line, the second adhesive line, and the third adhesive line define the elastic portion that is between respective ones of the first adhesive line, the second adhesive line, and the third adhesive line.

9. The display device of claim 8 , wherein the elastic portion has a honeycomb shape, a triangle shape, or a trapezoid shape.

10. The display device of claim 1 , wherein each of the plurality of adhesive lines comprises:
a first adhesive line that forms an acute angle with the rolling axis in a counterclockwise direction; and
a second adhesive line that forms an acute angle with the rolling axis in a clockwise direction, and
wherein the first adhesive line and the second adhesive line define the elastic portion that is between the first adhesive line and the second adhesive line.

11. The display device of claim 10 , wherein the elastic portion has a diamond shape.

12. The display device of claim 1 , wherein a storage modulus of the first adhesive layer is in a range of 1.0×10 4 to 1.0×10 6 at 25° C., and
wherein a loss tangent of the first adhesive layer is in a range of 0.3 to 1.5 at 25° C.

13. The display device of claim 1 , wherein an adhesion of the adhesive portion is in a range of 0.3 kgf/in to 1.5 kgf/in.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Heonjung
• Oh Hye-Jin
• Lee Jeoungsub
• Choi Min-Hoon
• Kim Kyungtae
• Kim Boa
• Kim Sanghoon
• Park Sang-Il
• Oh Hyunjoon

Classifications

• C09J7/00 Primary

  Adhesives in the form of films or foils · CPC title

• C09J7/10 Primary

  without carriers · CPC title

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• C09J2301/312

  parameters being the characterizing feature · CPC title

• C09J7/20 Primary

  characterised by their carriers · CPC title