US-20260130034-A1 - DISPLAY MODULE, MANUFACTURING METHOD THEREOF, AND DISPLAY DEVICE THEREOF

US20260130034A1US 20260130034 A1US20260130034 A1US 20260130034A1US-20260130034-A1

Abstract

The present application discloses a display module, a manufacturing method thereof, and a display device thereof. The display module includes a display panel, a cover plate and a first bonding layer and a second bonding layer therebetween. The first bonding layer and the second bonding layer are at least disposed in corner sub-regions of the display module. The first bonding layer contacts the cover plate. A surface of a side of the second bonding layer near cover plate contacts a surface of a side of the first bonding layer away from cover plate. A curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer.

Inventors

Wen HAN
Zikang FENG

Assignees

WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20240201
Priority Date: 20240123

Claims (20)

1 . A display module, comprising a plane region and a curved surface region located on an outer periphery of the plane region, and the curved surface region comprising a plurality of side edge sub-regions located on a peripheral side of the plane region and corner sub-regions each of which is located between adjacent two of the side edge sub-regions, wherein the display module comprises: a display panel; a cover plate disposed on a side of the display panel; and a first bonding layer located between the display panel and the cover plate, wherein the first bonding layer is at least disposed in the corner sub-regions, and the first bonding layer contacts the cover plate; and a second bonding layer located between the display panel and the cover plate, wherein the second bonding layer is at least disposed in the corner sub-regions, and a surface of a side of the second bonding layer near the cover plate contacts the first bonding layer; wherein a curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer.
2 . The display module according to claim 1 , wherein a bonding force between the first bonding layer and the cover plate is less than a bonding force between the second bonding layer and the first bonding layer.
3 . The display module according to claim 1 , wherein a boundary of the first bonding layer is located in the curved surface region, and the boundary of the first bonding layer retracts relative to a boundary of the second bonding layer along a direction toward the plane region.
4 . The display module according to claim 3 , wherein a distance between the boundary of the second bonding layer and the boundary of the first bonding layer is greater than or equal to 0 and is less than or equal to 0.5 microns.
5 . The display module according to claim 1 , wherein a boundary of the first bonding layer is located in the curved surface region, and the boundary of the first bonding layer protrudes relative to a boundary of the second bonding layer along a direction away from the plane region.
6 . The display module according to claim 5 , wherein a distance between the boundary of the second bonding layer and the boundary of the first bonding layer is greater than 0 and is less than or equal to 0.1 microns.
7 . The display module according to claim 1 , wherein a thickness of the first bonding layer is greater than or equal to a thickness of the second bonding layer.
8 . The display module according to claim 7 , wherein the thickness of the first bonding layer ranges from 25 microns to 200 microns, and the thickness of the second bonding layer ranges from 25 microns to 200 microns.
9 . The display module according to claim 1 , wherein the display module further comprises a light shielding layer located on an edge of the cover plate, and the light shielding layer is disposed between the cover plate and the first bonding layer; wherein at least a portion of the first bonding layer overlaps the light shielding layer.
10 . The display module according to claim 9 , wherein the first bonding layer comprises a first sub-region and a second sub-region, the second bonding layer comprises a third sub-region and a fourth sub-region, orthographic projections of the first sub-region and the third sub-region on the light shielding layer are located in the light shielding layer, orthographic projections of the second sub-region and the fourth sub-region on a plane in which the cover plate is located do not overlap the light shielding layer, and curing rates of the first sub-region, the second sub-region, and the third sub-region are equal.
11 . The display module according to claim 10 , wherein material of the first bonding layer is equal to material of the first bonding layer; wherein a curing rate of the fourth sub-region is less than a curing rate of the third sub-region.
12 . The display module according to claim 11 , wherein material of the first bonding layer comprises ultraviolet curable optical adhesive, and material of the second bonding layer comprises an ultraviolet curable optical adhesive.
13 . The display module according to claim 10 , wherein material of the first bonding layer is different from material of the first bonding layer; wherein the curing rate of the fourth sub-region is equal to the curing rate of the third sub-region.
14 . The display module according to claim 13 , wherein material of the first bonding layer comprises an ultraviolet curable optical adhesive, material of the second bonding layer comprises a non-ultraviolet curable optical adhesive.
15 . The display module according to claim 1 , wherein the display module further comprises a backplate disposed on a side of the display panel away from the cover plate, and a boundary of the second bonding layer, a boundary of the display panel, and a boundary of the backplate are located in in a same plane.
16 . The display module according to claim 15 , wherein the display module further comprises a polarizer disposed between the display panel and the second bonding layer, and the boundary of the second bonding layer, a boundary of the polarizer, the boundary of the display panel, and the boundary of the backplate are located in a same plane.
17 . A display module manufacturing method, comprising a plane region and a curved surface region located on an outer periphery of the plane region, and the curved surface region comprising a plurality of side edge sub-regions located on a peripheral side of the plane region and corner sub-regions each of which is located between adjacent two of the side edge sub-regions, wherein the display module manufacturing method comprises: providing a cover plate; forming a first bonding layer on a side of the cover plate away from a light exiting surface of the display module, and implementing a curing process to the first bonding layer, wherein the first bonding layer is at least disposed in the corner sub-regions; providing a display panel, forming a second bonding layer on a side of the display panel near the light exiting surface of the display module, wherein the second bonding layer is at least disposed in the corner sub-regions; and making a surface of the second bonding layer away from the display panel contacting a surface of the first bonding layer away from the cover plate, and implementing a curing process to the second bonding layer; wherein a curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer.
18 . A display device, comprising a display module, the display module comprising a plane region and a curved surface region located on an outer periphery of the plane region, and the curved surface region comprising a plurality of side edge sub-regions located on a peripheral side of the plane region and corner sub-regions each of which is located between adjacent two of the side edge sub-regions: wherein the display module comprises: a display panel; a cover plate disposed on a side of the display panel; and a first bonding layer located between the display panel and the cover plate, wherein the first bonding layer is at least disposed in the corner sub-regions, and the first bonding layer contacts the cover plate; and a second bonding layer located between the display panel and the cover plate, wherein the second bonding layer is at least disposed in the corner sub-regions, and a surface of a side of the second bonding layer near the cover plate contacts the first bonding layer; wherein a curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer.
19 . The display device according to claim 18 , wherein a boundary of the first bonding layer is located in the curved surface region, and the boundary of the first bonding layer retracts relative to a boundary of the second bonding layer along a direction toward the plane region.
20 . The display device according to claim 19 , wherein the display module further comprises a light shielding layer located on an edge of the cover plate, the light shielding layer is disposed between the cover plate and the first bonding layer, and at least a portion of the first bonding layer overlaps the light shielding layer; wherein the first bonding layer comprises a first sub-region and a second sub-region, the second bonding layer comprises a third sub-region and a fourth sub-region, orthographic projections of the first sub-region and the third sub-region on the light shielding layer are located in the light shielding layer, orthographic projections of the second sub-region and the fourth sub-region on a plane in which the cover plate are located do not overlap the light shielding layer, curing rates of the first sub-region, the second sub-region, and the third sub-region are equal, and a curing rate of the fourth sub-region is less than a curing rate of the third sub-region.

Description

FIELD OF INVENTION The present application relates to a field of display technologies, especially to a display module, a manufacturing method thereof, and a display device thereof. BACKGROUND OF INVENTION With the trend of electronic apparatuses pursuing the ultimate full-screen development, various display screens (for example, cell phones) are emerging endlessly in the market. In order to pursue the diversification of the appearance of display apparatus, the cover plate of the display screen has evolved from dual curved surfaces on the left and right sides to curved surfaces all around or even fully curved forms. Curved surface screens include dual curved surface screens formed by the curvature of the two opposite sides of the display screen and quad-curved surface screens formed by the curvature of all four sides of the display screen. Quad-curved surface screens are usually formed by bonding the display panel with a cover plate having curved surfaces. In quad-curved surface screens, the positions where adjacent curved surfaces of the display screen intersect form Gaussian curved surfaces, which are prone to bubbles after bonding. SUMMARY OF INVENTION The present application provides a display module, a manufacturing method thereof, and a display device thereof to ease a technical issue of a Gaussian curved surface of the conventional quad-curved surface screen easily has bubbles after bonding. To solve the above solution, technical solutions provided by the present application are as follows: The present application provides a display module, comprising a plane region and a curved surface region located on an outer periphery of the plane region, and the curved surface region comprising a plurality of side edge sub-regions located on a peripheral side of the plane region and corner sub-regions each of which is located between adjacent two of the side edge sub-regions, wherein the display module comprises: a display panel;a cover plate disposed on a side of the display panel; anda first bonding layer located between the display panel and the cover plate, wherein the first bonding layer is at least disposed in the corner sub-regions, and the first bonding layer contacts the cover plate; anda second bonding layer located between the display panel and the cover plate, wherein the second bonding layer is at least disposed in the corner sub-regions, and a surface of a side of the second bonding layer near the cover plate contacts the first bonding layer;wherein a curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer. The present application also sets forth a display module manufacturing method, comprising a plane region and a curved surface region located on an outer periphery of the plane region, and the curved surface region comprising a plurality of side edge sub-regions located on a peripheral side of the plane region and corner sub-regions each of which is located between adjacent two of the side edge sub-regions, wherein the display module manufacturing method comprises: providing a cover plate;forming a first bonding layer on a side of the cover plate away from a light exiting surface of the display module, and implementing a curing process to the first bonding layer, wherein the first bonding layer is at least disposed in the corner sub-regions;providing a display panel, forming a second bonding layer on a side of the display panel near the light exiting surface of the display module, wherein the second bonding layer is at least disposed in the corner sub-regions; andmaking a surface of the second bonding layer away from the display panel contacting a surface of the first bonding layer away from the cover plate, and implementing a curing process to the second bonding layer;wherein a curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer. The present application also sets forth a display device, comprising a display module, the display module comprising a plane region and a curved surface region located on an outer periphery of the plane region, and the curved surface region comprising a plurality of side edge sub-regions located on a peripheral side of the plane region and corner sub-regions each of which is located between adjacent two of the side edge sub-regions: wherein the display module comprises:a display panel;a cover plate disposed on a side of the display panel; anda first bonding layer located between the display panel and the cover plate, wherein the first bonding layer is at least disposed in the corner sub-regions, and the first bonding layer contacts the cover plate; anda second bonding layer located between the display panel and the cover plate, wherein the second bonding layer is at least disposed in the corner sub-regions, and a surface of a side of the second bonding layer near the cover plate contacts the first bonding layer;wherein a curing rate of the first bonding layer is