PROTECTIVE FILM, DISPLAY MODULE, DISPLAY DEVICE, METHOD OF MANUFACTURING DISPLAY MODULE, AND METHOD OF MANUFACTURING DISPLAY DEVICE

• US 20190081274A1
• Filed: 03/27/2018
• Published: 03/14/2019
• Est. Priority Date: 09/08/2017
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHOI, Dongwan, KIM, Doyoub
• Granted Patent: US 10,777,769 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2202/22 Antistatic materials or arrangements
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/80 using temporary substrates
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A display module includes a display panel for displaying an image, and a protective film adhered to a back surface of the display panel. The protective film includes a compensation layer being in contact with the back surface of the display panel, a first release layer disposed under the compensation layer, a cushion layer disposed under the first release layer, and a second release layer disposed under the cushion layer. An adhesive strength of the first release layer is less than an adhesive strength of the second release layer.

Claims

1. A display module comprising:

a display panel for displaying an image; and

a protective film adhered to a back surface of the display panel,

wherein the protective film comprises;

a compensation layer being in contact with the back surface of the display panel;

a first release layer disposed under the compensation layer;

a cushion layer disposed under the first release layer; and

a second release layer disposed under the cushion layer,

wherein an adhesive strength of the first release layer is less than an adhesive strength of the second release layer.

2. The display module of claim 1, wherein a thickness of the cushion layer is greater than a thickness of the compensation layer.

3. The display module of claim 1, wherein the cushion layer includes polymer resin foam.

4. The display module of claim 1, wherein the first release layer comprises a grip portion protruding from an edge of the first release layer in a plan view.

5. The display module of claim 1, wherein the first release layer comprises:

a first sub-release layer having a first adhesive strength; and

a second sub-release layer having a second adhesive strength less than the first adhesive strength, and

wherein the first adhesive strength and the second adhesive strength are less than the adhesive strength of the second release layer.

6. The display module of claim 5, wherein a groove or a hole is provided in an area of the cushion layer, which overlaps with a boundary between the first sub-release layer and the second sub-release layer when viewed in a plan view.

7. The display module of claim 1, wherein the compensation layer comprises:

a first antistatic layer;

a colored layer disposed under the first antistatic layer; and

a second antistatic layer disposed under the colored layer.

8. The display module of claim 1, wherein the protective film further comprises:

an adhesive layer disposed between the first release layer and the cushion layer to adhere the first release layer to the cushion layer.

9. A protective film comprising:

a protective paper;

a compensation layer disposed under the protective paper;

a first release layer disposed under the compensation layer;

a cushion layer disposed under the first release layer; and

a second release layer disposed under the cushion layer,

wherein an adhesive strength of the first release layer is less than an adhesive strength of the second release layer.

10. The protective film of claim 9, wherein a thickness of the cushion layer is greater than a thickness of the compensation layer, and

wherein the cushion layer includes polymer resin foam.

11. The protective film of claim 9, wherein the first release layer comprises a grip portion protruding from an edge of the first release layer in a plan view.

12. The protective film of claim 9, wherein the first release layer comprises:

a first sub-release layer having a first adhesive strength; and

a second sub-release layer having a second adhesive strength less than the first adhesive strength.

13. The protective film of claim 12, wherein a groove or a hole is provided in an area of the cushion layer, which overlaps with a boundary between the first sub-release layer and the second sub-release layer when viewed in a plan view.

14. The protective film of claim 9, further comprising:

an adhesive layer disposed between the first release layer and the cushion layer to adhere the first release layer to the cushion layer.

15. The protective film of claim 9, wherein the compensation layer comprises:

a glue layer disposed under the protective paper;

a first antistatic layer disposed under the glue layer;

a colored layer disposed under the first antistatic layer; and

a second antistatic layer disposed under the colored layer.

16. A method of manufacturing a display module, the method comprising:

aligning a protective film with a back surface of a display panel, wherein the protective film comprises;

a compensation layer;

a first release layer disposed under the compensation layer and having a first adhesive strength;

a cushion layer disposed under the first release layer; and

a second release layer disposed under the cushion layer and having a second adhesive strength greater than the first adhesive strength; and

adhering the protective film to the display panel in such a way that the compensation layer is in contact with the back surface of the display panel.

17. The method of claim 16, further comprising:

separating the first release layer from the compensation layer adhered to the display panel.

18. The method of claim 16, wherein the first release layer comprises:

a first sub-release layer having a third adhesive strength greater than the first adhesive strength and less than the second adhesive strength; and

a second sub-release layer having the first adhesive strength, the method further comprising;

separating the second sub-release layer from the compensation layer adhered to the display panel.

19. The method of claim 18, further comprising:

providing a groove or a hole in an area of the cushion layer, which overlaps with a boundary between the first sub-release layer and the second sub-release layer.

20. A method of manufacturing a display device, the method comprising:

aligning a protective film with a back surface of a display panel, wherein the protective film comprises;

a compensation layer;

a first release layer disposed under the compensation layer;

a cushion layer disposed under the first release layer; and

a second release layer disposed under the cushion layer;

adhering the protective film to the display panel in such a way that the compensation layer is in contact with the back surface of the display panel; and

separating the first release layer from the compensation layer being in contact with the display panel.

21. The method of claim 20, wherein an adhesive strength of the first release layer is less than an adhesive strength of the second release layer.

22. The method of claim 20, wherein the first release layer comprises:

a first sub-release layer having a first adhesive strength; and

a second sub-release layer having a second adhesive strength less than the first adhesive strength, and

wherein only the second sub-release layer of the first and second sub-release layers is separated in the separating of the first release layer.

23. The method of claim 22, further comprising:

providing a groove or a hole in an area of the cushion layer, which overlaps with a boundary between the first sub-release layer and the second sub-release layer.

24. A display device comprising:

a display panel for displaying an image;

a protective film adhered to a back surface of the display panel; and

a bracket disposed under the protective film,

wherein the protective film comprises;

a compensation layer being in contact with the back surface of the display panel and including a first area and a second area;

a first release layer disposed under the compensation layer; and

a cushion layer disposed under the first release layer,

wherein the first release layer and the cushion layer overlap with the first area and do not overlap with the second area, when viewed in a plan view.

25. The display device of claim 24, wherein a concave region is provided in an area of the bracket, which overlaps with the first area in a plan view.

26. The display device of claim 24, wherein a central portion of the protective film is defined as the first area and an outer portion of the protective film is defined as the second area, when viewed in a plan view.