Method of manufacturing cover window and method of manufacturing display device

Patent metadata

Field	Value
Publication number	US-12403638-B2
Application number	US-202318329654-A
Country	US
Kind code	B2
Filing date	Jun 6, 2023
Priority date	Oct 13, 2022
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A method of manufacturing a display device, the method including ejecting a window raw material into a mold, precuring the ejected window raw material, molding a cover window by placing the precured window raw material onto a display panel and curing the precured window raw material, and separating the mold from the cover window.

First claim

What is claimed is:

1. A method of manufacturing a display device, comprising:
providing a mold to hold, contain, and shape a window raw material;
ejecting the window raw material into the mold;
precuring the ejected window raw material;
molding a cover window by placing the precured window raw material onto a display panel and curing the precured window raw material; and
separating the mold from the cover window after the curing.

2. The method of claim 1 , wherein in the ejecting of the window raw material, the window raw material is ejected into the mold by inkjet technique.

3. The method of claim 1 , wherein
the window raw material comprises a material selected from a group consisting of siloxane, epoxy, and a combination thereof, and
the cover window comprises of a material selected from a group consisting of siloxane, epoxy, and a combination thereof.

4. The method of claim 1 , wherein a curing energy used in the molding the cover window is about three times higher than a curing energy used in the precuring of the window raw material.

5. The method of claim 4 , wherein the curing energy used in the precuring the window raw material is in a range of about 800 mJ to about 1200 mJ.

6. The method of claim 4 , wherein the curing energy used in the molding of the cover window is in a range of about 2500 mJ to about 3500 mJ.

7. The method of claim 1 , wherein the molding of the cover window further comprises treating a top surface of the display panel to which the precured window raw material is bonded with plasma before the placing of the precured window raw material onto the display panel.

8. The method of claim 1 , further comprising, between the precuring of the ejected window raw material and the molding of the cover window:
forming a printed pattern that defines a non-display area of the display device on the precured window raw material, wherein
the printed pattern comprises a material selected from a group consisting of a black pigment, a dye, a light absorbing material, and a combination thereof, and
the display device further including a display area where pixels are disposed and an image is displayed, the non-display area surrounding and being outside of the display area in plan view, the non-display area corresponding to sides of the display device.

9. The method of claim 8 , wherein the printed pattern is produced by an inkjet technique.

10. The method of claim 1 , further comprising, before the ejecting of the window raw material into the mold:
applying a release agent onto a support surface of the mold onto which the window raw material is to be ejected.

11. The method of claim 1 , wherein the display panel comprises:
a display element layer disposed on a substrate, the display element layer including a plurality of pixels that include:
a plurality of pixel electrodes;
a plurality of light-emitting layers;
a common electrode; and
a pixel-defining film that defines the plurality of pixels; and

a thin-film encapsulation layer disposed on the display element layer.

12. The method of claim 10 , wherein at least one of an optical film and an input detection sensor is further disposed on the display panel.

13. A method of manufacturing a display device, comprising:
a mold to receive and contain a window raw material;
ejecting the window raw material into the mold;
precuring the ejected window raw material;
forming a printed pattern that defines a non-display area of the display device on the precured window raw material;
molding a cover window by curing the precured window raw material;
bonding the cover window disposed in the mold to a display panel by using an adhesive; and
separating the mold from the cover window after the molding and the bonding.

14. The method of claim 13 , wherein in the ejecting of the window raw material, the window raw material is ejected into the mold by an inkjet technique.

15. The method of claim 14 , wherein
the window raw material comprises a material selected from a group consisting of siloxane, epoxy, and a combination thereof, and
the cover window comprises a material selected from a group consisting of siloxane, epoxy, and a combination thereof.

16. The method of claim 15 , wherein the printed pattern comprises a material selected from a group consisting of a black pigment, a dye, a light absorbing material, and a combination thereof.

17. The method of claim 16 , wherein the printed pattern is formed by an inkjet technique.

18. The method of claim 13 , wherein the adhesive comprises a material selected from a group consisting of an optically clear adhesive (OCA), an optically clear resin (OCR), and a combination thereof.

19. A method of manufacturing a display device, comprising:
providing a mold to receive a window raw material;
ejecting the window raw material into the mold;
precuring the ejected window raw material;
forming a printed pattern that defines a non-display area of the display device on the precured window raw material; and
molding a cover window by curing the precured window raw material, wherein a surface of the cover window has a profile that conforms to a profile of a surface of the mold.

20. The method of claim 19 , wherein
in the ejecting of the window raw material, the window raw material is ejected into the mold by an inkjet technique,
the window raw material comprises a material selected from a group consisting of siloxane, epoxy, and a combination thereof, and
the cover window comprises a material selected from a group consisting of siloxane, epoxy, and a combination thereof.

21. The method of claim 1 , wherein
the mold having rounded corners, and
the cover window having a curved surface at edges to correspond to the rounded corners of the mold.

22. The method of claim 1 , wherein the mold includes at least one of polyethylene terephthalate (PET), polyvinyl chloride (PVC), polypropylene (PP), polyvinylidene chloride (PVDC), polyethylene (PE), polytetrafluoroethylene (PTFE).

23. The method of claim 1 , further comprising:
coating a release agent onto the mold prior to the ejecting.

24. The method of claim 13 , wherein
the display device further comprising a display area corresponding to where pixels are disposed in the display panel and where an image is produced, and
the cover window having a flat portion corresponding to the display area and a curved portion at sides of the flat portion corresponding to the non-display area of the display device.

Assignees

• Samsung Display Co Ltd

Inventors

• Jung Kyu Ho
• Byun Sang Chul

Classifications

• B29C65/4805

  characterised by the type of adhesives · CPC title

• B29C2045/14745

  in-line printing · CPC title

• B29C2045/14885

  by plasma treatment · CPC title

• B29C2045/0075

  curing or polymerising by irradiation · CPC title

• B29L2031/3475

  Displays, monitors, TV-sets, computer screens · CPC title