Display apparatus, structure and manufacturing apparatus of flexible display apparatus

Patent metadata

Field	Value
Publication number	US-11316139-B2
Application number	US-201916709569-A
Country	US
Kind code	B2
Filing date	Dec 10, 2019
Priority date	Dec 21, 2018
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A manufacturing apparatus is configured to bond a display panel to a cover window having a flat portion between a first curvature portion and a second curvature portion. The manufacturing apparatus comprises a first attachment portion configured to press a first adhesive surface of the display panel to the flat portion of the cover window, and a 3D attachment portion configured to press a first edge adhesive surface and a second edge adhesive surface of the display panel to the first curvature portion and the second curvature portion of the window, respectively, and not press the first adhesive surface of the display panel.

First claim

What is claimed is:

1. A manufacturing apparatus configured to bond a display panel to a cover window having a flat portion between a first curvature portion and a second curvature portion, the manufacturing apparatus comprising:
a first attachment portion configured to press a first adhesive surface of the display panel to the flat portion of the cover window; and
a 3D attachment portion configured to press a first edge adhesive surface and a second edge adhesive surface of the display panel to the first curvature portion and the second curvature portion of the cover window, respectively, and not press the first adhesive surface of the display panel,
wherein the 3D attachment portion includes:
a window supporting member configured to support the cover window; and
a 3D attachment unit overlapping the window supporting member and having a 3D pressurizing pad configured to press the first edge adhesive surface and the second edge adhesive surface of the display panel to the first curvature portion and the second curvature portion of the cover window, respectively, and not press the first adhesive surface of the display panel,

wherein the 3D pressurizing pad includes:
a pad body;
a first pressurizing portion protruding from a side of the pad body, the first pressurizing portion having varying thickness and configured to press the first edge adhesive surface of the display panel to the first curvature portion; and
a second pressurizing portion protruding from another side of the pad body, the second pressurizing portion having varying thickness and configured to press the second edge adhesive surface of the display panel to the second curvature portion, and
wherein the 3D pressurizing pad further includes a groove portion between the first pressurizing portion and the second pressurizing portion, and a cross-sectional area of the groove portion is gradually reduced toward the pad body.

2. The manufacturing apparatus of claim 1 , wherein the first attachment portion includes:
a first window supporting stage configured to support the cover window;
a panel supporting stage overlapping the first window supporting stage and configured to be loaded with the display panel; and
a first attachment unit having a first pressurizing pad configured to press the first adhesive surface of the display panel to the flat portion of the cover window by passing through the panel supporting stage.

3. The manufacturing apparatus of claim 2 , wherein the panel supporting stage includes a pad through hole overlapping the first adhesive surface of the display panel, and the first pressurizing pad presses the first adhesive surface of the display panel to the flat portion of the cover window by passing through the pad through hole.

4. The manufacturing apparatus of claim 2 , wherein the first attachment portion further includes a film delamination unit configured to delaminate or peel a protective film of an adhesive sheet of the display panel loaded in the panel supporting stage.

5. The manufacturing apparatus of claim 1 , further comprising a second attachment portion, wherein the second attachment portion includes:
a second window supporting stage configured to support the cover window; and
a second attachment unit overlapping the second window supporting stage and having a second pressurizing pad configured to press a second adhesive surface of the display panel to the flat portion of the cover window, the second adhesive surface having an area greater than that of the first adhesive surface.

6. The manufacturing apparatus of claim 5 , wherein the second pressurizing pad includes a convex panel pressurizing surface.

7. A manufacturing apparatus configured to bond a display panel to a cover window having a flat portion between a first curvature portion and a second curvature portion, the manufacturing apparatus comprising:
a 3D attachment portion configured to press a first edge adhesive surface and a second edge adhesive surface of the display panel to the first curvature portion and the second curvature portion of the cover window, respectively, and not press a first adhesive surface of the display panel between the first edge adhesive surface and the second edge adhesive surface of the display panel,
wherein the 3D attachment portion includes:
a window supporting member configured to support the cover window; and
a 3D attachment unit overlapping the window supporting member and having a 3D pressurizing pad configured to press the first edge adhesive surface and the second edge adhesive surface of the display panel to the first curvature portion and the second curvature portion of the cover window, respectively, and not press the first adhesive surface of the display panel,
wherein the 3D pressurizing pad includes:
a pad body;
a first pressurizing portion protruding from a side of the pad body, the first pressurizing portion having varying thickness and configured to press the first edge adhesive surface of the display panel to the first curvature portion; and
a second pressurizing portion protruded from another side of the pad body, the second pressurizing portion having varying thickness and configured to press the second edge adhesive surface of the display panel to the second curvature portion, and
wherein the 3D pressurizing pad further includes a groove portion between the first pressurizing portion and the second pressurizing portion, and a cross-sectional area of the groove portion is gradually reduced toward the pad body.

8. The manufacturing apparatus of claim 7 , wherein the 3D pressurizing pad further includes:
a slit arranged on a middle portion of the pad body between the first pressurizing portion and the second pressurizing portion, and formed to be recessed from the groove portion; and
a hollow surface formed to be recessed from an outer side of each of the first pressurizing portion and the second pressurizing portion.

9. The manufacturing apparatus of claim 8 ,
wherein the slit includes an arc shape having a first curvature radius, and
wherein the hollow surface includes another arc shape having a second curvature radius greater than the first curvature radius.

10. The manufacturing apparatus of claim 9 , wherein a center of the hollow surface is aligned with a center of the slit.

11. The manufacturing apparatus of claim 7 , wherein the 3D pressurizing pad further includes a slit formed to be recessed from a middle portion of the pad body and connected to each of the first pressurizing portion and the second pressurizing portion.

12. The manufacturing apparatus of claim 11 , wherein the first pressurizing portion includes:
a first convex surface configured to press the first edge adhesive surface of the display panel to the first curvature portion; and
a first slope surface between the first convex surface and the slit.

13. The manufacturing apparatus of claim 12 , wherein the second pressurizing portion includes:
a second convex surface configured to press the second edge adhesive surface of the display panel to the second curvature portion; and
a second slope surface between the second convex surface and the slit.

14. The manufacturing apparatus of claim 7 , wherein the first pressurizing portion includes:
a first convex surface configured to press the first edge adhesive surface of the display panel to the first curvature portion;
a first hollow surface between one side end of the pad body and one end of the first convex surface; and
a first slope surface between the other end of the first convex surface and a middle portion of the pad body.

15. The manufacturing appara

Assignees

• Lg Display Co Ltd

Inventors

• Kuon Ikhyun
• Kim Yongsoo
• Han Sangeun
• Byun Sungnam
• Park Jeongkweon
• Lee Sanggul
• Pyo Changmin
• Seo Doowon
• Kang Bogyung
• Park Sungwook
• Lee Juyeob
• Ha YongMin
• Shin Soonbum
• Kim Moongoo
• Park Chan
• Lee Yunmi

Classifications

• H10K50/8426

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/8794

  Arrangements for heating and cooling · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/873

  Encapsulations · CPC title