Flexible display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9874772-B2
Application number	US-201514968602-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	Feb 26, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A flexible display and method of manufacturing the same are disclosed. In one aspect, the flexible display includes a display panel configured to display images, a window substrate disposed on a first surface of the display panel, and a lower passivation film attached to a second surface of the display panel opposing the first surface. The flexible display can also include a lower adhesive layer interposed between the display panel and the lower passivation film. The lower adhesive layer can include a plurality of isolated-pattern portions and a peripheral portion surrounding the isolated-pattern portions.

First claim

What is claimed is:

1. A flexible display, comprising:
a display panel configured to display images;
a window substrate disposed on a first surface of the display panel;
a lower passivation film attached to a second surface of the display panel opposing the first surface;
a lower adhesive layer interposed between the display panel and the lower passivation film; and
a winding cylinder fixed to one end of the display panel,
wherein the lower adhesive layer includes a plurality of isolated-pattern portions and a peripheral portion surrounding the isolated-pattern portions,
wherein the display panel is configured to be rolled around the winding cylinder, and
wherein the isolated-pattern portions are arranged to have an increasing density as they become farther away from the winding cylinder.

2. The flexible display of claim 1 , wherein the isolated-pattern portions are defined as a plurality of openings in the peripheral portion of the lower adhesive layer.

3. The flexible display of claim 1 , wherein the isolated-pattern portions are formed of an adhesive material that is different from that of the peripheral portion.

4. The flexible display of claim 1 , wherein each of the isolated-pattern portions are formed to have a polygonal shape and wherein the isolated-pattern portions are spaced apart from each other.

5. The flexible display of claim 1 , wherein the lower adhesive layer includes two layers, and wherein the two layers each include a plurality of isolated-pattern portions with different arrangements from each other.

6. The flexible display of claim 1 , further comprising: a touch screen panel interposed between the window substrate and the display panel; and a window adhesive layer interposed between the window substrate and the touch screen panel, wherein the window adhesive layer includes a plurality of isolated-pattern portions and a peripheral portion surrounding the isolated-pattern portions, and wherein the isolated-pattern portions of the window adhesive layer are configured to distribute stress differently than the peripheral portion of the window adhesive layer.

7. The flexible display of claim 6 , wherein the isolated-pattern portions of the window adhesive layer are defined as a plurality of openings in the peripheral portion of the window adhesive layer.

8. The flexible display of claim 6 , wherein the isolated-pattern portions of the window adhesive layer are formed of an adhesive material that is different from that of the peripheral portion of the window adhesive layer.

9. The flexible display of claim 6 wherein each of the isolated-pattern portions of the window adhesive layer are formed to have a polygonal shape and wherein the isolated-pattern portions of the window adhesive layer are spaced apart from each other.

10. The flexible display of claim 6 , wherein the window adhesive layer includes two layers, and wherein the two layers each include a plurality of isolated-pattern portions with different arrangements from each other.

11. The flexible display of claim 6 , further comprising a touch screen panel (TSP) adhesive layer interposed between the display panel and the touch screen panel, wherein the TSP adhesive layer includes a plurality of isolated-pattern portions and a peripheral portion surrounding the isolated-pattern portions, and wherein the isolated-pattern portions of the TSP adhesive layer are configured to distribute stress differently than the peripheral portion of the TSP adhesive layer.

12. The flexible display of claim 11 , wherein the isolated-pattern portions of the TSP adhesive layer are defined as a plurality of openings in the peripheral portion of the TSP adhesive layer.

13. The flexible display of claim 11 , wherein the isolated-pattern portions of the TSP adhesive layer are formed of an adhesive material different from that of the peripheral portion of the TSP adhesive layer.

14. The flexible display of claim 11 , wherein each of the isolated-pattern portions of the TSP adhesive layer are formed to have a polygonal shape and wherein the isolated-pattern portions of the TSP adhesive layer are spaced apart from each other.

15. The flexible display of claim 11 , wherein the TSP adhesive layer includes two layers, and wherein the two layers each include a plurality of isolated-pattern portions with different arrangements from each other.

16. The flexible display of claim 6 , further comprising: an optical film interposed between the window substrate and the touch screen panel; and an optical film adhesive layer interposed between the optical film and the touch screen panel, wherein the optical film adhesive layer includes a plurality of isolated-pattern portions and a peripheral portion surrounding the isolated-pattern portions, and wherein the isolated-pattern portions of the optical film adhesive layer are configured to distribute stress differently than the peripheral portion of the optical film adhesive layer.

17. The flexible display of claim 16 , wherein the isolated-pattern portions of the optical film adhesive layer are defined as a plurality of openings in the peripheral portion of the optical film adhesive layer.

18. The flexible display of claim 16 , wherein the isolated-pattern portions of the optical film adhesive layer are formed of an adhesive material different from that of the peripheral portion of the optical film adhesive layer.

19. The flexible display of claim 16 , wherein each of the isolated-pattern portions of the optical film adhesive layer are formed to have a polygonal shape and wherein the isolated-pattern portions of the optical film adhesive layer are spaced apart from each other.

20. The flexible display of claim 16 , wherein the optical film adhesive layer includes two layers, and wherein the two layers each include a plurality of isolated-pattern portions with different arrangements from each other.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Youn Joon
• Lee Jung Hun
• Lee Sang Jo
• Lee Jusuck
• Choi Kyung Min

Classifications

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• C09J2203/318

  for the production of liquid crystal displays · CPC title

• B32B2457/208

  Touch screens · CPC title

• Y10T428/1036

  Cross-Sectional Technologies · mapped topic