Display module and manufacturing method therefor, and display apparatus

Patent metadata

Field	Value
Publication number	US-11719969-B2
Application number	US-202017296614-A
Country	US
Kind code	B2
Filing date	Jul 13, 2020
Priority date	Jul 31, 2019
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A display module is provided that includes a curved back panel including a bottom board and a side frame disposed on the bottom board; a display assembly located in an accommodation space enclosed by the side frame and the bottom board; a cover board located on a side, away from the bottom board, of the display assembly and supported by the side frame; and a bonding layer including a first bonding portion and a second bonding portion, which are located between the cover board and the side frame. Both the first bonding portion and the second bonding portion are configured to bond the cover board to the side frame to enable the cover board to be curved. The second bonding portion has a smaller elasticity modulus than the first bonding portion. A method for manufacturing the display module, and a display apparatus are further provided.

First claim

What is claimed is:

1. A display module, comprising:
a curved back panel comprising a bottom board and a side frame disposed on the bottom board;
a display assembly located in an accommodation space enclosed by the side frame and the bottom board;
a cover board located on a side of the display assembly away from the bottom board and supported by the side frame; and
a bonding layer comprising a first bonding portion and a second bonding portion located between the cover board and the side frame,
wherein the first bonding portion and the second bonding portion are both configured to bond the cover board to the side frame to enable the cover board to be curved, and
wherein an elasticity modulus of the second bonding portion is smaller than the elasticity modulus of the first bonding portion.

2. The display module according to claim 1 , wherein:
the first bonding portion comprises first solid glue and second solid glue disposed on the side frame, and the first solid glue and the second solid glue both are configured to extend along a circumferential direction of the cover board, and the first solid glue, the second solid glue and the side frame are configured to enclose an accommodation cavity; and
the second bonding portion comprises liquid glue, and the liquid glue is filled in the accommodation cavity.

3. The display module according to claim 2 , wherein the first solid glue and the second solid glue are spaced apart, the first solid glue is closer to an outer wall surface of the side frame than the second solid glue, and the second solid glue is closer to an inner wall surface of the side frame than the first solid glue.

4. The display module according to claim 3 , wherein both the first solid glue and the second solid glue are in a ring shape, and the first solid glue is configured to surround the second solid glue.

5. The display module according to claim 2 , wherein a surface of the side frame in contact with the liquid glue is provided with a groove.

6. The display module according to claim 2 , wherein the first solid glue and the second solid glue are a substrate-free double sided adhesive, and the liquid glue is optical glue.

7. The display module according to claim 1 , wherein the first bonding portion and the second bonding portion are both solid glue, the second bonding portion is disposed in a plurality of corner areas of the side frame, and the first bonding portion is disposed between any two adjacent corner areas and extends from one corner area of any two adjacent corner areas to the other corner area of the two adjacent corner areas.

8. The display module according to claim 7 , wherein the first bonding portion is a substrate-free double sided adhesive, and the second bonding portion is a foam substrate double sided adhesive.

9. The display module according to claim 7 , wherein an end of the first bonding portion close to the second bonding portion comprises a first bump protruding toward the second bonding portion, an end of the second bonding portion close to the first bonding portion comprises a second bump protruding toward the first bonding portion, and the first bump and the second bump are configured to abut against each other in a width direction of the first bonding portion.

10. The display module according to claim 1 , wherein the display module is curved.

11. The display module according to claim 1 , wherein the display assembly comprises a display panel and a touch panel bonded between the display panel and the cover board, and the display panel, the touch panel, and the cover board are all curved.

12. The display module according to claim 1 , wherein a curvature of the curved back panel is the same as a curvature of the cover board.

13. The display module according to claim 1 , wherein the side frame is detachably coupled to the bottom board.

14. A display apparatus, comprising:
a display module, the display module comprising:
a curved back panel comprising a bottom board and a side frame disposed on the bottom board;
a display assembly located in an accommodation space enclosed by the side frame and the bottom board;
a cover board located on a side of the display assembly away from the bottom board and supported by the side frame; and
a bonding layer comprising a first bonding portion and a second bonding portion located between the cover board and the side frame,
wherein the first bonding portion and the second bonding portion are both configured to bond the cover board to the side frame to enable the cover board to be curved, and
wherein an elasticity modulus of the second bonding portion is smaller than the elasticity modulus of the first bonding portion.

15. The display apparatus according to claim 14 , wherein:
the first bonding portion comprises first solid glue and second solid glue disposed on the side frame, the first solid glue and the second solid glue both are configured to extend along a circumferential direction of the cover board, and the first solid glue, the second solid glue, and the side frame are configured to enclose an accommodation cavity; and
the second bonding portion comprises liquid glue, and the liquid glue is filled in the accommodation cavity.

16. The display apparatus according to claim 14 , wherein the first bonding portion and the second bonding portion are both solid glue, the second bonding portion is disposed in a plurality of corner areas of the side frame, and the first bonding portion is disposed between any two adjacent corner areas and extends from one corner area of any two adjacent corner areas to the other corner area of the two adjacent corner areas.

17. The display apparatus according to claim 14 , wherein the display assembly comprises a display panel and a touch panel bonded between the display panel and the cover board, and the display panel, the touch panel, and the cover board are all curved.

18. A method of manufacturing a display module, comprising:
manufacturing a curved back panel through a die-casting process, wherein the curved back panel comprises a bottom board and a side frame disposed on the bottom board;
performing a cold-bending process on a cover board to make a curved cover board;
bonding the curved cover board to the side frame through a first bonding portion and a second bonding portion, wherein an elasticity modulus of the second bonding portion is smaller than the elasticity modulus of the first bonding portion; and
providing a display assembly, wherein the display assembly comprises a display panel and a touch panel bonded to each other,
wherein, before the bonding the curved cover board to the side frame through the first bonding portion and the second bonding portion, the method of manufacturing the display module further comprises:
bonding the display panel and the touch panel bonded to each other to the cover board, wherein the touch panel is located between the display panel and the cover board, and the cold-bending process is performed on the display panel, the touch panel and the cover board that are bonded together, to enable all of the display panel, the touch panel and the cover board to be curved; or
performing the cold-bending process on the display panel and the touch panel that are bonded to each other to enable both of the display panel and the touch panel to be curved, and bonding the display panel and the touch panel as curved to the cover board, wherein the touch panel is located between the display panel and the cover board.

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Han Rui
• Zhai Yue
• Ma Qing
• Zhang Zhipeng
• Tong Zeyuan
• Cui Dong
• Li Wenyang
• Zhang Zan
• Leng Shouyang
• Chi Weining
• Wang Fengping
• Tan Rui

Classifications

• G02F1/133314 Primary

  Back frames · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G02F1/133308 Primary

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

• G02F1/133325

  Assembling processes · CPC title

• G02F1/133331 Primary

  Cover glasses · CPC title