Display module and manufacturing method thereof

Abstract

The application discloses a display module and a manufacturing method thereof. The edge corner curved surface area of the display module is provided with a second transparent adhesive layer. The second transparent adhesive layer is arranged on one surface of the cover plate facing the display panel. A part of the second transparent adhesive layer fills the recess. The part of the first transparent adhesive layer is connected with the cover plate, and the part of the first transparent adhesive layer is connected with the second transparent adhesive layer. That is, the second transparent adhesive layer is separately arranged in the edge corner curved surface area of the display module corresponding to the cover plate to fill the recess of the cover plate. The curvature radius of the edge corner curved surface area of the display module is reduced, the bending degree of the module on the side of the display panel fixed with the cover plate is reduced, the rebound force of the module on the side of the display panel fixed with the cover plate is reduced, and the problem of bubbles generated after the cover plate and the display panel are fixed and attached is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display module and a manufacturing method thereof. BACKGROUND

[0002] The curved display module includes a four-curved display module, and each of the four sides of the four-curved display module has a certain bending curvature. The four-curved display module includes a display panel and a cover plate. The cover plate is fixedly attached to the display panel through an optically transparent adhesive on the display panel. The position where the two adjacent curved sides of the four-curved display module intersect forms a Gauss curved surface area. After the cover plate of the four-curved display module is fixedly attached to the display panel, the Gauss curved surface area of the four-curved display module is prone to bubbles. SUMMARY

[0003] Embodiments of the present application provide a display module and a manufacturing method thereof to improve the problem that the Gauss curved surface area of the display module is prone to bubbles.

[0004] In a first aspect, embodiments of the present application provide a display module, comprising a planar area and a curved area located at the periphery of the planar area, the curved area comprising a plurality of side curved area located at the side of the planar area and a corner curved area located between two adjacent side curved areas, the corner curved area of the display module comprising:

[0005] a display panel;

[0006] a cover plate, the cover plate being arranged on the light-emitting side of the display panel, and a surface of the cover plate facing the display panel being formed with a recess;

[0007] a first transparent adhesive layer, the first transparent adhesive layer being arranged on a side of the display panel facing the cover plate;

[0008] a second transparent adhesive layer, the second transparent adhesive layer being arranged on a surface of the cover plate facing the display panel, and the second transparent adhesive layer filling the recess;

[0009] wherein part of the first transparent adhesive layer is connected with the cover plate, and part of the first transparent adhesive layer is connected with the second transparent adhesive layer.

[0010] Further, the thickness of the side of the second transparent adhesive layer away from the edge of the recess is greater than the thickness of the side of the second transparent adhesive layer close to the edge of the recess.

[0011] Further, in the top view of the display module, the second transparent adhesive layer is located in the recess.

[0012] Further, in the top view of the display module, the edge of the display panel is located in the first transparent adhesive layer.

[0013] Further, the first transparent adhesive layer has a first spacing between the edge of the first transparent adhesive layer and the edge of the display panel, and the length of the first spacing is not more than 0.1 um.

[0014] Further, in a top view of the display module, the edge of the second transparent adhesive layer is located in the first transparent adhesive layer, and the edge of the second transparent adhesive layer does not exceed the edge of the display panel.

[0015] Further, the surface energy of the interface between the second transparent adhesive layer and the cover plate is higher than the surface energy of the interface between the second transparent adhesive layer and the first transparent adhesive layer.

[0016] Further, the display module further comprises an opaque ink layer, the opaque ink layer is arranged on a surface of the cover plate facing the display panel, and in a top view of the display module, the opaque ink layer does not overlap the second transparent adhesive layer.

[0017] Further, the materials of the first transparent adhesive layer and the second transparent adhesive layer are different.

[0018] In a second aspect, embodiments of the present application provide a manufacturing method of a display module, the display module comprising a planar region and a curved region located at the periphery of the planar region, the curved region comprising a plurality of side curved regions located at the side of the planar region and a corner curved region located between two adjacent side curved regions, the manufacturing method comprising:

[0019] arranging a first transparent adhesive layer on the light-emitting surface of the display panel, wherein the first transparent adhesive layer is located in the corner curved region;

[0020] arranging an optically transparent resin adhesive on the cover plate and curing the optically transparent resin adhesive to form a second transparent adhesive layer on the cover plate, wherein the cover plate has a recessed portion, the optically transparent resin adhesive fills the recessed portion, and the second transparent adhesive layer is located in the corner curved region;

[0021] fixing part of the second transparent adhesive layer and part of the first transparent adhesive layer, and fixing the cover plate and part of the first transparent adhesive layer, so as to fix the cover plate and the display panel.

[0022] The beneficial effects of the present application are as follows:

[0023] The present application provides a display module, which includes a second transparent adhesive layer in the corner curved area of ​​the display module, wherein the second transparent adhesive layer is provided on a surface of the cover plate facing the display panel, and a portion of the second transparent adhesive layer fills the recessed portion, wherein a portion of the first transparent adhesive layer is connected to the cover plate, and a portion of the first transparent adhesive layer is connected to the second transparent adhesive layer; that is, a second transparent adhesive layer is separately provided in the corner curved area of ​​the display module corresponding to the cover plate to fill the recessed portion of the cover plate, which can reduce the curvature radius of the corner curved area of ​​the display module, reduce the bending degree of the module on the display panel side fixed to the cover plate, thereby reducing the rebound force of the module on the display panel side fixed to the cover plate, and thereby improve the problem of bubbles generated after the cover plate and the display panel are bonded and fixed.

[0024] The present application provides a method for manufacturing a display module, which comprises providing a first transparent adhesive layer on the light-emitting surface of a display panel located in the edge curved surface area, providing an optically transparent resin glue on a cover plate, and curing the optically transparent resin glue to form a second transparent adhesive layer on the cover plate, and forming a recessed portion on the cover plate, and filling the recessed portion with the optically transparent resin glue; then fixing the second transparent adhesive layer to a portion of the first transparent adhesive layer, and fixing the cover plate to a portion of the first transparent adhesive layer, so that the cover plate is fixed to the display panel; that is, a second transparent adhesive layer is separately provided in the edge curved surface area of ​​the display module corresponding to the cover plate to fill the recessed portion of the cover plate, which can reduce the curvature radius of the edge curved surface area of ​​the display module, reduce the bending degree of the module on the display panel side fixed to the cover plate, thereby reducing the rebound force of the module on the display panel side fixed to the cover plate, and thereby improving the problem of bubbles generated after the cover plate and the display panel are bonded and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a conventional display module;

[0026] Figure 2 yes Figure 1 Schematic diagram of the display module generating bubbles;

[0027] Figure 3 is a schematic diagram of the display module of the present application;

[0028] Figure 4 yes Figure 2 The structural diagram of the display module shown;

[0029] Figure 5 yes Figure 2 A schematic diagram of the structure of the corner curved area of ​​the display module shown;

[0030] Figure 6 yes Figure 2A schematic view of a corner curved surface area of the display module not filled with a second transparent adhesive layer is shown.

[0031] Figure 7 is Figure 2 A schematic view of a corner curved surface area of the display module filled with a second transparent adhesive layer is shown.

[0032] 10 - display module; 100 - display panel; 200 - cover plate, 210 - recess; 300 - first transparent adhesive layer; 400 - second transparent adhesive layer; 500 - support functional layer; 600 - back plate; 700 - polarizing layer; 800 - light-blocking ink layer.

[0033] 01 - display panel; 02 - cover plate; 03 - bubble; 04 - Gaussian curved surface area; 05 - polarizing layer; 06 - optically transparent adhesive. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings of the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application, and should not be regarded as limiting the protection scope of the present application.

[0035] In addition, the terms "first", "second", and similar words do not represent any order, quantity, or importance, but are only used to distinguish different technical features. The term "multiple" and similar words represent two or more, unless otherwise explicitly limited.

[0036] The first embodiment of the present application provides a display module 10, referring to Figures 3-7 , comprising a planar area AA and a curved surface area BB located at the periphery of the planar area AA, the curved surface area BB comprising a plurality of side edge curved surface areas BB1 located at the side of the planar area AA and a corner curved surface area BB2 located between two adjacent side edge curved surface areas BB1, the corner curved surface area BB2 of the display module 10 comprising a display panel 100, a cover plate 200, a first transparent adhesive layer 300, and a second transparent adhesive layer 400.

[0037] Specifically, the cover plate 200 is arranged on the light-emitting side of the display panel 100, and a recess 210 is formed on one surface of the cover plate 200 facing the display panel 100; the first transparent adhesive layer 300 is arranged on one side of the display panel 100 facing the cover plate 200; the second transparent adhesive layer 400 is arranged on one surface of the cover plate 200 facing the display panel 100, and the second transparent adhesive layer 400 fills the recess 210, wherein part of the first transparent adhesive layer 300 is connected with the cover plate 200, and part of the first transparent adhesive layer 300 is connected with the second transparent adhesive layer 400.

[0038] The position where the two adjacent curved edges of the four-curved display module intersect forms a Gauss curved surface area 04. When the curvature of the curved surface area at the periphery of the flat area of the four-curved display module becomes steeper and steeper, the curvature radius of the part of the module of the display panel 01 fixed to the cover plate 02 and the cover plate 02 becomes smaller and smaller, which causes the rebound force of the part of the module of the display panel 01 fixed to the cover plate 02 to increase. The conventional four-curved display module 10 includes a display panel 01 and a cover plate 02. The cover plate 02 is fixedly attached to the display panel 01 through the optical transparent adhesive 06 on the display panel 01. After the cover plate 02 of the four-curved display module is fixedly attached to the display panel 01, because the rebound force of the part of the module of the display panel 01 fixed to the cover plate 02 is greater than the adhesive force of the optical transparent adhesive 06 and the cover plate 02, the Gauss curved surface area 04 of the four-curved display module is prone to bubbles. Therefore, the technical solution of the present application sets the corner curved surface area BB2 of the display module 10 to include a second transparent adhesive layer 400. The second transparent adhesive layer 400 is arranged on a surface of the cover plate 200 facing the display panel 100. A part of the second transparent adhesive layer 400 fills the recessed part 210. The part of the first transparent adhesive layer 300 is connected to the cover plate 200, and the part of the first transparent adhesive layer 300 is connected to the second transparent adhesive layer 400. That is, the second transparent adhesive layer 400 is separately arranged in the corner curved surface area BB2 of the display module 10 corresponding to the cover plate 200 to fill the recessed part 210 of the cover plate 200. This can reduce the curvature radius of the corner curved surface area BB2 of the display module 10, reduce the bending degree of the part of the module of the display panel 100 fixed to the cover plate 200, thereby reducing the rebound force of the part of the module of the display panel 100 fixed to the cover plate 200, and further improving the problem of bubbles generated after the cover plate 200 is fixedly attached to the display panel 100.

[0039] In the embodiment, the material of the first transparent adhesive layer 300 and the second transparent adhesive layer 400 is different.

[0040] In the embodiment, the material of the first transparent adhesive layer 300 includes optical clear adhesive (OCA).

[0041] It should be noted that the optical clear adhesive is in the state of a film or a sheet before curing.

[0042] In the embodiment, the material of the second transparent adhesive layer 400 includes optical clear resist (OCR). By setting the material of the second transparent adhesive layer 400 to include optical clear resist, the optical clear resist can better penetrate, so as to ensure that the second transparent adhesive layer 400 can better fill the recessed part 210, thereby reducing the risk of bubbles generated between the second transparent adhesive layer 400 and the cover plate 200.

[0043] It should be noted that the optical transparent resin glue is a liquid resin which will chemically react to become a solid transparent body during the curing process. The OCR glue is usually in a liquid or semi-liquid state before curing.

[0044] In the embodiment, referring to Figure 5 、 Figure 7 , the thickness of the second transparent adhesive layer 400 on the side away from the edge of the recess 210 is greater than the thickness of the second transparent adhesive layer 400 on the side close to the edge of the recess 210. Since the bending degree of the middle position of the recess 210 is greater than the bending degree of the edge position of the recess 210, that is, the depth of the middle position of the recess 210 is greater than the depth of the edge position of the recess 210, when the second transparent adhesive layer 400 is of equal thickness at each position of the recess 210, there is still a relatively large radius of curvature at the middle position of the recess 210, which limits the improvement effect on the problem of air bubbles. Therefore, by setting the thickness of the second transparent adhesive layer 400 on the side away from the edge of the recess 210 to be greater than the thickness of the second transparent adhesive layer 400 on the side close to the edge of the recess 210, the radius of curvature of the middle position of the corner curved surface area BB2 of the display module 10 corresponding to the middle position of the recess 210 can be closer to the radius of curvature of the edge position of the corner curved surface area BB2 of the display module 10 corresponding to the edge position of the recess 210, which can further reduce the bending degree of the module of the part of the display panel 100 fixed with the cover plate 200, thereby further reducing the rebound force of the module of the part of the display panel 100 fixed with the cover plate 200, and further improving the problem of air bubbles generated after the cover plate 200 is fixed with the display panel 100.

[0045] In the embodiment, referring to Figure 7 , in the top view of the display module 10, the second transparent adhesive layer 400 is located in the recess 210. By setting the second transparent adhesive layer 400 in the recess 210, that is, no second transparent adhesive layer 400 is arranged in other areas except the recess 210, the increase in the thickness of the display module 10 caused by the arrangement of the second transparent adhesive layer 400 can be avoided.

[0046] In the embodiment, the thickness of the second transparent adhesive layer 400 is less than the thickness of the first transparent adhesive layer 300.

[0047] In the embodiment, the thickness of the second transparent adhesive layer 400 is not greater than 100 um. Preferably, the thickness of the second transparent adhesive layer 400 is 0, 10 um, 20 um, 30 um, 40 um, 50 um, 20 um, 60 um, 70 um, 80 um, 90 um or 100 um.

[0048] It should be noted that, since the second transparent adhesive layer 400 is not an equal-thickness film layer, the closer the second transparent adhesive layer 400 is to the edge of the recess 210, the smaller the thickness of the second transparent adhesive layer 400, and the closer the second transparent adhesive layer 400 is to the middle of the recess 210, the greater the thickness of the second transparent adhesive layer 400, wherein the thickness of the position where the second transparent adhesive layer 400 contacts the edge of the recess 210 is 0.

[0049] In the present embodiment, it is referred to Figure 5 In the top view of the display module 10, the edge of the display panel 100 is located in the first transparent adhesive layer 300. In the conventional scheme, it is referred to Figure 1 Figure 2 The optical transparent adhesive 06 is smaller than the length of the display panel 01, that is, the optical transparent adhesive 06 is inwardly retracted, and the edge of the optical transparent adhesive 06 has a second spacing b from the edge of the display panel 01. Since there are certain defects in the bonding of the cover plate 02 and the optical transparent adhesive 06, and the optical transparent adhesive 06 is subjected to greater force in the Gaussian surface area, the thickness of the optical transparent adhesive is uneven, and the edge of the Gaussian surface area lacks the optical transparent adhesive 06, which also easily leads to the problem of air bubbles 03. Therefore, the technical scheme of the present application sets the edge of the display panel 100 in the first transparent adhesive layer 300, that is, the first transparent adhesive layer 300 is outwardly expanded, the length of the first transparent adhesive layer 300 is increased, and the risk of air bubbles caused by the failure of the first transparent adhesive layer 300 to completely fill the area between the display panel 100 and the cover plate 200 is reduced, thereby further improving the problem of air bubbles generated after the bonding and fixation of the cover plate 200 and the display panel 100. At the same time, since the thickness of the transparent adhesive at the middle position of the recess 210 will be thicker, it can play a role in absorbing glue, thereby also being able to improve the problem of glue overflow of the display module 10.

[0050] In the present embodiment, the edge of the display panel 100 located in the side edge curved surface area BB1 of the display module 10 is located in the first transparent adhesive layer 300.

[0051] In the present embodiment, the edge of the display panel 100 located in the side edge curved surface area BB1 of the display module 10 is located outside the first transparent adhesive layer 300.

[0052] In the present embodiment, it is referred to Figure 5 ​The first transparent adhesive layer 300 has a first spacing a between the edge of the first transparent adhesive layer 300 and the edge of the display panel 100, and the length of the first spacing a is not more than 0.1 um. By setting the first spacing a between the edge of the first transparent adhesive layer 300 and the edge of the display panel 100, and setting the length of the first spacing a to be not more than 0.1 um, on the one hand, the length of the first transparent adhesive layer 300 is increased, and the risk of air bubbles caused by the first transparent adhesive layer 300 failing to completely fill the area between the display panel 100 and the cover plate 200 is reduced. On the other hand, the risk of overflow of the first transparent adhesive layer 300 caused by the increase in the length of the first transparent adhesive layer 300 is avoided. Preferably, the length of the first spacing a is 0.03 um, 0.04 um, 0.05 um, 0.06 um, 0.07 um, 0.08 um, 0.09 um or 0.1 um.

[0053] In this embodiment, with reference to Figure 5 In the top view of the display module 10, the edge of the second transparent adhesive layer 400 is located in the first transparent adhesive layer 300, and the edge of the second transparent adhesive layer 400 does not exceed the edge of the display panel 100. By setting the edge of the second transparent adhesive layer 400 to be located in the first transparent adhesive layer 300, and the edge of the second transparent adhesive layer 400 to not exceed the edge of the display panel 100, the curvature radius of the corner curved surface area BB2 filled with the second transparent adhesive layer 400 can be more gentle. At this time, the curvature radius of the corner curved surface area BB2 filled with the second transparent adhesive layer 400 is the largest, thereby avoiding the increase in the stress of the edge of the cover plate 200 of the corner curved surface area BB2.

[0054] In this embodiment, with reference to Figure 4 、 Figure 5 The display module further comprises a support functional layer 500, a back plate 600 and a polarizing layer 700. The back plate 600 is arranged on the support functional layer 500, the display panel 100 is arranged on the back plate 600, and the polarizing layer 700 is arranged on the display panel 100.

[0055] It should be noted that the module on the display panel side comprises the support functional layer 500, the back plate 600, the display panel 100, the polarizing layer 700 and the first transparent adhesive layer.

[0056] In the embodiment, the surface energy of the interface between the second transparent adhesive layer 400 and the cover plate 200 is higher than the surface energy of the interface between the second transparent adhesive layer 400 and the first transparent adhesive layer 300. By setting the surface energy of the interface between the second transparent adhesive layer 400 and the cover plate 200 to be higher than the surface energy of the interface between the second transparent adhesive layer 400 and the first transparent adhesive layer 300, the second transparent adhesive layer 400 has greater adhesion to the cover plate 200 than to the first transparent adhesive layer 300, thereby reducing the risk of air bubbles occurring between the cover plate 200 and the second transparent adhesive layer 400.

[0057] In the embodiment, the surface energy of the interface between the second transparent adhesive layer 400 and the cover plate 200 is equal to the surface energy of the interface between the second transparent adhesive layer 400 and the first transparent adhesive layer 300.

[0058] In the embodiment, the display module further comprises an opaque ink layer 800, which is arranged on a surface of the cover plate 200 facing the display panel 100. In a top view of the display module, the opaque ink layer 800 does not overlap the second transparent adhesive layer 400. By arranging the opaque ink layer 800 not to overlap the second transparent adhesive layer 400, there is no overlapping area between the second transparent adhesive layer 400 and the opaque ink layer 800. When the second transparent adhesive layer 400 and the first transparent adhesive layer 300 are fixed, the opaque ink layer 800 does not exist between the second transparent adhesive layer 400 and the first transparent adhesive layer 300. Thus, the adhesion of the second transparent adhesive layer 400 to the first transparent adhesive layer 300 is not reduced due to the presence of the opaque ink layer 800, thereby reducing the risk of air bubbles occurring between the second transparent adhesive layer 400 and the first transparent adhesive layer 300.

[0059] The second embodiment of the present application provides a manufacturing method of a display module 10. Referring to Figure 3 , Figure 5 The display module 10 comprises a planar area AA and a curved area BB located at the periphery of the planar area AA. The curved area BB comprises a plurality of side curved areas BB1 located at the sides of the planar area AA and a corner curved area BB2 located between two adjacent side curved areas BB1. The manufacturing method comprises:

[0060] A first transparent adhesive layer 300 is arranged on the light-emitting surface of the display panel 100. The first transparent adhesive layer 300 is located in the corner curved area BB2.

[0061] An optical transparent resin glue is arranged on the cover plate 200, and the optical transparent resin glue is cured to form a second transparent glue layer 400 on the cover plate 200, wherein the cover plate 200 is provided with a recessed portion 210, the optical transparent resin glue fills the recessed portion 210, and the second transparent glue layer 400 is located in the corner curved surface area BB2.

[0062] The second transparent glue layer 400 and part of the first transparent glue layer 300 are fixed, and the cover plate 200 and part of the first transparent glue layer 300 are fixed to fix the cover plate 200 and the display panel 100.

[0063] By arranging the first transparent glue layer 300 on the light-emitting surface of the display panel 100 located in the corner curved surface area BB2, arranging the optical transparent resin glue on the cover plate 200, and curing the optical transparent resin glue to form the second transparent glue layer 400 on the cover plate 200, and the cover plate 200 is provided with a recessed portion 210, the optical transparent resin glue fills the recessed portion 210; then the second transparent glue layer 400 and the cover plate 200 and the first transparent glue layer 300 are fixed to fix the cover plate 200 and the display panel 100; that is, the second transparent glue layer 400 is arranged separately on the cover plate 200 corresponding to the corner curved surface area BB2 of the display module 10 to fill the recessed portion 210 of the cover plate 200, which can reduce the radius of curvature of the corner curved surface area BB2 of the display module 10, reduce the bending degree of the module of the part of the display panel 100 fixed with the cover plate 200, thereby reducing the rebound force of the module of the part of the display panel 100 fixed with the cover plate 200, and further improving the problem of air bubbles generated after the cover plate 200 and the display panel 100 are fixed and bonded.

[0064] In this embodiment, the materials of the first transparent glue layer 300 and the second transparent glue layer 400 are different.

[0065] In this embodiment, the material of the first transparent glue layer 300 includes OCA (Optically Clear Adhesive) glue.

[0066] It should be noted that the optical transparent glue is in the state of a glue film or a glue sheet before curing.

[0067] In this embodiment, the material of the second transparent glue layer 400 includes OCR (Optical Clear Resin) glue. By arranging the material of the second transparent glue layer 400 to include OCR glue, the OCR glue can better penetrate to ensure that the second transparent glue layer 400 can better fill the recessed portion 210, thereby reducing the risk of air bubbles generated between the second transparent glue layer 400 and the cover plate 200.

[0068] It should be noted that the optical transparent resin glue is a liquid resin which will chemically react to become a solid transparent body during the curing process. The OCR glue is usually in a liquid or semi-liquid state before curing.

[0069] In the embodiment, referring to Figure 5 , Figure 7 , the thickness of the second transparent adhesive layer 400 on the side away from the edge of the recess 210 is greater than the thickness of the second transparent adhesive layer 400 on the side close to the edge of the recess 210. Since the bending degree of the middle position of the recess 210 is greater than the bending degree of the edge position of the recess 210, that is, the depth of the middle position of the recess 210 is greater than the depth of the edge position of the recess 210, when the second transparent adhesive layer 400 is of equal thickness at different positions of the recess 210, there is still a relatively large radius of curvature at the middle position of the recess 210, which limits the improvement effect on the problem of air bubbles. Therefore, by setting the thickness of the second transparent adhesive layer 400 on the side away from the edge of the recess 210 to be greater than the thickness of the second transparent adhesive layer 400 on the side close to the edge of the recess 210, the radius of curvature of the middle position of the corner curved surface area BB2 of the display module 10 corresponding to the middle position of the recess 210 can be closer to the radius of curvature of the edge position of the corner curved surface area BB2 of the display module 10 corresponding to the edge position of the recess 210, which can further reduce the bending degree of the module of the part of the display panel 100 fixed with the cover plate 200, thereby further reducing the rebound force of the module of the part of the display panel 100 fixed with the cover plate 200, and further improving the problem of air bubbles generated after the cover plate 200 is fixed with the display panel 100.

[0070] In the embodiment, referring to Figure 7 , in the top view of the display module 10, the second transparent adhesive layer 400 is located in the recess 210. By setting the second transparent adhesive layer 400 in the recess 210, that is, no second transparent adhesive layer 400 is arranged in other areas except the recess 210, the increase in the thickness of the display module 10 caused by the arrangement of the second transparent adhesive layer 400 can be avoided.

[0071] In the embodiment, the thickness of the second transparent adhesive layer 400 is less than the thickness of the first transparent adhesive layer 300.

[0072] In the embodiment, the thickness of the second transparent adhesive layer 400 is not greater than 100 um. Preferably, the thickness of the second transparent adhesive layer 400 is 0, 10 um, 20 um, 30 um, 40 um, 50 um, 20 um, 60 um, 70 um, 80 um, 90 um or 100 um.

[0073] It should be noted that, since the second transparent adhesive layer 400 is not an equal-thickness film layer, the closer the second transparent adhesive layer 400 is to the edge of the recess 210, the smaller the thickness of the second transparent adhesive layer 400, and the closer the second transparent adhesive layer 400 is to the middle of the recess 210, the greater the thickness of the second transparent adhesive layer 400, wherein the thickness of the position where the second transparent adhesive layer 400 contacts the edge of the recess 210 is 0.

[0074] In the present embodiment, reference is made to Figure 5 In the top view of the display module 10, the edge of the display panel 100 is located in the first transparent adhesive layer 300. In a conventional scheme, the optically transparent adhesive is smaller than the length of the display panel 100, that is, the first transparent adhesive layer 300 is inwardly retracted. Since there are certain defects in the bonding of the cover plate 200 and the optically transparent adhesive, and the optically transparent adhesive is subjected to greater force in the Gaussian curved surface area, the thickness of the optically transparent adhesive is uneven, and the edge of the Gaussian curved surface area lacks optically transparent adhesive, which has also led to the problem of air bubbles. Therefore, the technical solution of the present application sets the edge of the display panel 100 in the first transparent adhesive layer 300, that is, the first transparent adhesive layer 300 is outwardly expanded, thereby increasing the length of the first transparent adhesive layer 300 and reducing the risk of air bubbles caused by the failure of the first transparent adhesive layer 300 to completely fill the area between the display panel 100 and the cover plate 200, thereby further improving the problem of air bubbles generated after the bonding and fixation of the cover plate 200 and the display panel 100. At the same time, since the thickness of the transparent adhesive at the middle position of the recess 210 is thicker, it can play a role in absorbing adhesive, thereby also improving the problem of adhesive overflow of the display module 10.

[0075] In the present embodiment, the edge of the display panel 100 located in the side edge curved surface area BB1 of the display module 10 is located in the first transparent adhesive layer 300.

[0076] In the present embodiment, the edge of the display panel 100 located in the side edge curved surface area BB1 of the display module 10 is located outside the first transparent adhesive layer 300.

[0077] In the present embodiment, reference is made to Figure 5The first transparent adhesive layer 300 has a first spacing a between the edge of the first transparent adhesive layer 300 and the edge of the display panel 100, and the length of the first spacing a is not more than 0.1 um. By setting the first spacing a between the edge of the first transparent adhesive layer 300 and the edge of the display panel 100, and setting the length of the first spacing a to be not more than 0.1 um, on the one hand, the length of the first transparent adhesive layer 300 is increased, and the risk of air bubbles caused by the first transparent adhesive layer 300 failing to completely fill the area between the display panel 100 and the cover plate 200 is reduced, and on the other hand, the risk of overflow of the first transparent adhesive layer 300 caused by the increase in the length of the first transparent adhesive layer 300 is avoided. Preferably, the length of the first spacing a is 0.03 um, 0.04 um, 0.05 um, 0.06 um, 0.07 um, 0.08 um, 0.09 um or 0.1 um.

[0078] In this embodiment, with reference to Figure 5 In the top view of the display module 10, the edge of the second transparent adhesive layer 400 is located in the first transparent adhesive layer 300, and the edge of the second transparent adhesive layer 400 does not exceed the edge of the display panel 100. By setting the edge of the second transparent adhesive layer 400 to be located in the first transparent adhesive layer 300, and the edge of the second transparent adhesive layer 400 to not exceed the edge of the display panel 100, the curvature radius of the corner curved surface area BB2 filled with the second transparent adhesive layer 400 can be more gentle, and at this time, the curvature radius of the corner curved surface area BB2 filled with the second transparent adhesive layer 400 is the largest, thereby avoiding the increase in the stress of the edge of the cover plate 200 of the corner curved surface area BB2.

[0079] In this embodiment, with reference to Figure 4 、 Figure 5 The display module further comprises a support functional layer 500, a back plate 600, a polarizing layer 700 and a light shielding ink layer 800. The back plate 600 is arranged on the support functional layer 500, the display panel 100 is arranged on the back plate 600, the polarizing layer 700 is arranged on the display panel 100, and the light shielding ink layer 800 is arranged between the first transparent adhesive layer 300 and the cover plate 200.

[0080] It should be noted that the module on the display panel side comprises a support functional layer 500, a back plate 600, a display panel 100, a polarizing layer 700 and a first transparent adhesive layer.

[0081] In the embodiment, the surface energy of the interface between the second transparent adhesive layer 400 and the cover plate 200 is higher than the surface energy of the interface between the second transparent adhesive layer 400 and the first transparent adhesive layer 300. By setting the surface energy of the interface between the second transparent adhesive layer 400 and the cover plate 200 to be higher than the surface energy of the interface between the second transparent adhesive layer 400 and the first transparent adhesive layer 300, the second transparent adhesive layer 400 has a greater bonding force with the cover plate 200 than with the first transparent adhesive layer 300, thereby reducing the risk of bubbles occurring between the cover plate 200 and the second transparent adhesive layer 400.

[0082] In the embodiment, the surface energy of the interface between the second transparent adhesive layer 400 and the cover plate 200 is equal to the surface energy of the interface between the second transparent adhesive layer 400 and the first transparent adhesive layer 300.

[0083] In the embodiment, the display module further comprises a light-blocking ink layer 800, which is arranged on a surface of the cover plate 200 facing the display panel 100. In a top view of the display module, the light-blocking ink layer 800 does not overlap the second transparent adhesive layer 400. By setting the light-blocking ink layer 800 not to overlap the second transparent adhesive layer 400, there is no overlapping area between the second transparent adhesive layer 400 and the light-blocking ink layer 800. When the second transparent adhesive layer 400 and the first transparent adhesive layer 300 are fixed, the light-blocking ink layer 800 does not exist between the second transparent adhesive layer 400 and the first transparent adhesive layer 300, thereby avoiding the bonding force between the second transparent adhesive layer 400 and the first transparent adhesive layer 300 from being reduced due to the existence of the light-blocking ink layer 800, and the risk of bubbles occurring between the second transparent adhesive layer 400 and the first transparent adhesive layer 300 is increased.

[0084] The specific embodiments of the present application are described in detail above. The above-described embodiments disclosed by the present application are only preferred embodiments of the present application. Those skilled in the art can make many modifications and improvements without departing from the concept of the present application. These modifications and improvements fall within the scope of the claims of the present application.

Claims

1. A display module, characterized in that: The display module includes a flat area and a curved area located outside the flat area. The curved area includes a plurality of side curved areas located around the flat area and a corner curved area located between two adjacent side curved areas. The corner curved area of ​​the display module includes: Display panel; a cover plate, the cover plate being arranged on the light-emitting side of the display panel, and a recessed portion being formed on a surface of the cover plate facing the display panel; a first transparent adhesive layer, the first transparent adhesive layer being disposed on a side of the display panel facing the cover plate; a second transparent adhesive layer, the second transparent adhesive layer being disposed on a surface of the cover plate facing the display panel, the second transparent adhesive layer filling the recessed portion; Part of the first transparent adhesive layer is connected to the cover plate, and part of the first transparent adhesive layer is connected to the second transparent adhesive layer; The surface energy of the interface between the second transparent adhesive layer and the cover plate is higher than the surface energy of the interface between the second transparent adhesive layer and the first transparent adhesive layer.

2. The display module according to claim 1, wherein: The thickness of the second transparent adhesive layer at a side away from the edge of the recessed portion is greater than the thickness of the second transparent adhesive layer at a side close to the edge of the recessed portion.

3. The display module according to claim 1, wherein: In a top view of the display module, the second transparent adhesive layer is located in the recessed portion.

4. The display module according to claim 1, wherein: In a top view of the display module, an edge of the display panel is located within the first transparent adhesive layer.

5. The display module according to claim 4, wherein: There is a first distance between the edge of the first transparent adhesive layer and the edge of the display panel, and the length of the first distance does not exceed 0.1 um.

6. The display module according to claim 1, wherein: In a top view of the display module, an edge of the second transparent adhesive layer is located within the first transparent adhesive layer, and the edge of the second transparent adhesive layer does not exceed an edge of the display panel.

7. The display module according to claim 1, wherein: The display module further includes a light-shielding ink layer, which is disposed on a surface of the cover plate facing the display panel. In a top view of the display module, the light-shielding ink layer does not overlap with the second transparent adhesive layer.

8. The display module according to claim 1, wherein: The first transparent adhesive layer and the second transparent adhesive layer are made of different materials.

9. A method for manufacturing a display module, characterized in that: The display module includes a flat area and a curved area located outside the flat area, wherein the curved area includes a plurality of side curved areas located around the flat area and a corner curved area located between two adjacent side curved areas. The manufacturing method includes: Disposing a first transparent adhesive layer on the light-emitting surface of the display panel, wherein the first transparent adhesive layer is located in the corner curved surface area; Disposing optically transparent resin glue on the cover plate and curing the optically transparent resin glue to form a second transparent adhesive layer on the cover plate, wherein a recessed portion is formed on the cover plate and the optically transparent resin glue fills the recessed portion, and the second transparent adhesive layer is located in the corner curved surface area; Fixing the second transparent adhesive layer to a portion of the first transparent adhesive layer, and fixing the cover plate to a portion of the first transparent adhesive layer, so that the cover plate is fixed to the display panel; The surface energy of the interface between the second transparent adhesive layer and the cover plate is higher than the surface energy of the interface between the second transparent adhesive layer and the first transparent adhesive layer.

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