Display module and manufacturing method thereof

Abstract

The invention discloses a display module and a manufacturing method thereof.A corner curved surface area of the display module comprises a second transparent adhesive layer, the second transparent adhesive layer is arranged on the surface, facing a display panel, of a cover plate, a part of the second transparent adhesive layer fills a concave part, and the second transparent adhesive layer is arranged on the surface, facing the display panel, of the cover plate; a part of the first transparent adhesive layer is connected with the cover plate, and a part of the first transparent adhesive layer is connected with the second transparent adhesive layer; the second transparent adhesive layer is independently arranged in the corner curved surface area of the display module corresponding to the cover plate and used for filling the concave part of the cover plate, so that the curvature radius of the corner curved surface area of the display module can be reduced, and the bending degree of the module on the side of the display panel fixed to the cover plate is reduced; therefore, the rebound force of the module on the side of the display panel fixed to the cover plate is reduced, and the problem of bubbles generated after the cover plate and the display panel are attached and fixed is solved.

Description

Technical Field

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

[0002] The curved display module includes a four-curved display module, and the four sides of the four-curved display module all have a certain curvature. The four-curved display module includes a display panel and a cover plate, and the cover plate is bonded and fixed to the display panel through an optical transparent adhesive on the display panel. The intersection of two adjacent curved edges of the four-curved display module forms a Gaussian curved surface area. After the cover plate of the four-curved display module is bonded and fixed to the display panel, bubbles are easily formed in the Gaussian curved surface area of ​​the four-curved display module. Summary of the invention

[0003] The embodiments of the present application provide a display module and a manufacturing method thereof to improve the problem that bubbles are easily generated in the Gaussian surface area of ​​the display module.

[0004] In a first aspect, an embodiment of the present application provides a display module, comprising a plane area and a curved surface area located outside the plane area, wherein the curved surface area comprises a plurality of side curved surface areas located around the plane area and a corner curved surface area located between two adjacent side curved surface areas, and the corner curved surface area of ​​the display module comprises:

[0005] Display panel;

[0006] 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;

[0007] a first transparent adhesive layer, wherein the first transparent adhesive layer is disposed on a side of the display panel facing the cover plate;

[0008] 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;

[0009] 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.

[0010] Furthermore, 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.

[0011] Furthermore, in the top view of the display module, the second transparent adhesive layer is located in the recessed portion.

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

[0013] Furthermore, 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.

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

[0015] Furthermore, 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] Furthermore, the display module further comprises a light-shielding ink layer, which is disposed on a surface of the cover plate facing the display panel, and in a top view of the display module, the light-shielding ink layer does not overlap with the second transparent adhesive layer.

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

[0018] In a second aspect, an embodiment of the present application provides a method for manufacturing a display module, wherein the display module includes a plane area and a curved surface area located outside the plane area, wherein the curved surface area includes a plurality of side curved surface areas located around the plane area and a corner curved surface area located between two adjacent side curved surface areas, and the manufacturing method includes:

[0019] 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;

[0020] Disposing optically transparent resin glue on the cover plate, and curing the optically transparent resin glue to form a second transparent glue layer on the cover plate, wherein a recessed portion is formed on the cover plate, the optically transparent resin glue fills the recessed portion, and the second transparent glue layer is located in the corner curved surface area;

[0021] The second transparent adhesive layer is fixed to a portion of the first transparent adhesive layer, and the cover plate is fixed to a portion of the first transparent adhesive layer, so that the cover plate is fixed to the display panel.

[0022] Beneficial effects of this application:

[0023] The present application provides a display module, wherein the corner curved surface area of ​​the display module includes a second transparent adhesive layer, the second transparent adhesive layer is arranged 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 arranged in the corner 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 corner 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 further 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 the following steps: setting a first transparent adhesive layer on the light-emitting surface of a display panel located in the edge and corner curved surface area, setting 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 set in the edge and corner 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 and corner 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 thus 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 It is a schematic diagram of a conventional display module;

[0026] Figure 2 yes Figure 1 The schematic diagram of the display module generating bubbles is shown;

[0027] Figure 3 is a schematic diagram of a 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 surface area of ​​the display module shown;

[0030] Figure 6 yes Figure 2A schematic diagram showing that the corner curved surface area of ​​the display module is not filled with the second transparent adhesive layer;

[0031] Figure 7 yes Figure 2 The schematic diagram shows that the corner curved area of ​​the display module is filled with a second transparent adhesive layer.

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

[0033] 01-display panel; 02-cover plate; 03-bubble; 04-Gaussian 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 drawings in 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 scope of protection of the present application.

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

[0036] The first embodiment of the present application provides a display module 10, referring to Figure 3-Figure 7 , including a plane area AA and a curved area BB located outside the plane area AA, the curved area BB includes a plurality of side curved areas BB1 located around the plane area AA and a corner curved area BB2 located between two adjacent side curved areas BB1, the corner curved area BB2 of the display module 10 includes 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 recessed portion 210 is formed on a surface of the cover plate 200 facing the display panel 100; the first transparent adhesive layer 300 is arranged on a side of the display panel 100 facing the cover plate 200; the second transparent adhesive layer 400 is arranged on a surface of the cover plate 200 facing the display panel 100, and the second transparent adhesive layer 400 fills the recessed portion 210, wherein a portion of the first transparent adhesive layer 300 is connected to the cover plate 200, and a portion of the first transparent adhesive layer 300 is connected to the second transparent adhesive layer 400.

[0038] A Gaussian curved surface area 04 is formed at the intersection of two adjacent curved surface edges of the four-curved display module. When the curvature of the curved surface area outside the plane area of ​​the four-curved display module becomes steeper and steeper, the curvature radius of the module of the portion of the display panel 01 fixed to the cover plate 02 and the cover plate 02 becomes smaller and smaller, resulting in an increase in the rebound force of the module of the portion of the display panel 01 fixed to the cover plate 02. The conventional four-curved display module 10 includes a display panel 01 and a cover plate 02. The cover plate 02 is bonded and fixed to the display panel 01 by an optically transparent adhesive 06 on the display panel 01. After the cover plate 02 of the four-curved display module is bonded and fixed to the display panel 01, bubbles are easily formed in the Gaussian curved surface area 04 of the four-curved display module because the rebound force of the module of the portion of the display panel 01 fixed to the cover plate 02 is greater than the adhesive force between the optically transparent adhesive 06 and the cover plate 02. Therefore, the technical solution of the present application is to set the corner curved surface area BB2 of the display module 10 to include a second transparent adhesive layer 400, and the second transparent adhesive layer 400 is arranged on a surface of the cover plate 200 facing the display panel 100, and a portion of the second transparent adhesive layer 400 fills the recessed portion 210, wherein a portion of the first transparent adhesive layer 300 is connected to the cover plate 200, and a portion of the first transparent adhesive layer 300 is connected to the second transparent adhesive layer 400, that is, a 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 portion 210 of the cover plate 200, which can reduce the curvature radius of the corner curved surface area BB2 of the display module 10, reduce the bending degree of the module of the portion of the display panel 100 fixed to the cover plate 200, thereby reducing the rebound force of the module of the portion of the display panel 100 fixed to the cover plate 200, and further improve the problem of bubbles generated after the cover plate 200 and the display panel 100 are bonded and fixed.

[0039] In this embodiment, the first transparent adhesive layer 300 and the second transparent adhesive layer 400 are made of different materials.

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

[0041] It should be noted that the optically transparent adhesive is in the state of an adhesive film or a film before curing.

[0042] In this embodiment, the material of the second transparent adhesive layer 400 includes optically clear resin glue (Optical Clear Resist, OCR). By setting the material of the second transparent adhesive layer 400 to include optically clear resin glue, the optically clear resin glue can penetrate better, ensuring that the second transparent adhesive layer 400 can better fill the recessed portion 210, thereby reducing the risk of bubbles between the second transparent adhesive layer 400 and the cover plate 200.

[0043] It should be noted that optically clear resin glue is a liquid resin that undergoes a chemical reaction during the curing process to become a solid transparent solid. OCR glue is usually in a liquid or semi-fluid state before curing.

[0044] In this embodiment, reference Figure 5 , Figure 7 , the thickness of the second transparent adhesive layer 400 at the side away from the edge of the recessed portion 210 is greater than the thickness of the second transparent adhesive layer 400 at the side close to the edge of the recessed portion 210. Since the curvature of the middle position of the recessed portion 210 is greater than the curvature of the edge position of the recessed portion 210, that is, the depth of the middle position of the recessed portion 210 is greater than the depth of the edge position of the recessed portion 210, when the second transparent adhesive layer 400 is of equal thickness at various positions of the recessed portion 210, the middle position of the recessed portion 210 still has a large curvature radius, resulting in certain limitations in the effect of improving the problem of bubbles. Therefore, by setting the thickness of the side of the second transparent adhesive layer 400 away from the edge of the recessed portion 210 to be greater than the thickness of the side of the second transparent adhesive layer 400 close to the edge of the recessed portion 210, the curvature radius of the middle position of the corner curved surface area BB2 of the display module 10 corresponding to the middle position of the recessed portion 210 can be closer to the curvature radius of the edge position of the corner curved surface area BB2 of the display module 10 corresponding to the edge position of the recessed portion 210, which can further reduce the bending degree of the module of the portion of the display panel 100 fixed to the cover plate 200, thereby further reducing the rebound force of the module of the portion of the display panel 100 fixed to the cover plate 200, and further improving the problem of bubbles generated after the cover plate 200 and the display panel 100 are bonded and fixed.

[0045] In this embodiment, reference Figure 7 In the top view of the display module 10, the second transparent adhesive layer 400 is located in the recessed portion 210. By arranging the second transparent adhesive layer 400 in the recessed portion 210, that is, the second transparent adhesive layer 400 is not arranged in other areas except the recessed portion 210, it is possible to avoid the thickness of the display module 10 being increased due to the second transparent adhesive layer 400.

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

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

[0048] It should be noted that, since the second transparent adhesive layer 400 is not a uniformly thick film layer, the closer the second transparent adhesive layer 400 is to the edge of the recessed portion 210, the smaller the thickness of the second transparent adhesive layer 400 is, and the closer the second transparent adhesive layer 400 is to the middle of the recessed portion 210, the thicker the second transparent adhesive layer 400 is, wherein the thickness of the position where the second transparent adhesive layer 400 touches the edge of the recessed portion 210 is 0.

[0049] In this embodiment, reference 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, refer to Figure 1 , Figure 2 The optical transparent glue 06 is smaller than the length of the display panel 01, that is, the optical transparent glue 06 is retracted, and the edge of the optical transparent glue 06 has a second distance b from the edge of the display panel 01. Since there are certain defects in the bonding between the cover plate 02 and the optical transparent glue 06, and the optical transparent glue 06 is subjected to greater force in the Gaussian surface area, the thickness of the optical transparent glue is uneven. The lack of optical transparent glue 06 at the edge of the Gaussian surface area is also prone to cause the problem of bubbles 03. Therefore, the technical solution of the present application arranges the edge of the display panel 100 to be located within the first transparent adhesive layer 300, that is, the first transparent adhesive layer 300 is expanded outward, thereby increasing the length of the first transparent adhesive layer 300, and reducing the risk of bubbles generated due to the first transparent adhesive layer 300 failing to completely fill the area between the display panel 100 and the cover plate 200, thereby further improving the problem of bubbles generated after the cover plate 200 and the display panel 100 are bonded and fixed; at the same time, since the thickness of the transparent adhesive in the middle position of the recessed portion 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 this embodiment, the edge of the display panel 100 located in the side curved area BB1 of the display module 10 is located in the first transparent adhesive layer 300 .

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

[0052] In this embodiment, reference Figure 5, there is 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 does not exceed 0.1um. 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 no more than 0.1um, on the one hand, the length of the first transparent adhesive layer 300 is increased, and the risk of 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 the first transparent adhesive layer 300 overflowing due to the increase in the length of the first transparent adhesive layer 300 is avoided. Preferably, the length of the first spacing a is 0.03um, 0.04um, 0.05um, 0.06um, 0.07um, 0.08um, 0.09um or 0.1um.

[0053] In this embodiment, reference Figure 5 In the top view of the display module 10, the edge of the second transparent adhesive layer 400 is located inside 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 inside 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, the curvature radius of the corner curved surface area BB2 filled with the second transparent adhesive layer 400 can be smoother. 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 an increase in the force on the edge of the cover plate 200 in the corner curved surface area BB2.

[0054] In this embodiment, reference Figure 4 , Figure 5 The display module further includes a supporting function layer 500 , a back plate 600 , and a polarizing layer 700 . The back plate 600 is disposed on the supporting function layer 500 , the display panel 100 is disposed on the back plate 600 , and the polarizing layer 700 is disposed on the display panel 100 .

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

[0056] In this 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 and the cover plate 200 have a greater bonding force than the second transparent adhesive layer 400 and the first transparent adhesive layer 300, thereby reducing the risk of bubbles generated between the cover plate 200 and the second transparent adhesive layer 400.

[0057] In this 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 this embodiment, the display module further includes a light-shielding ink layer 800, which is disposed on a surface of the cover plate 200 facing the display panel 100. In a top view of the display module, the light-shielding ink layer 800 does not overlap with the second transparent adhesive layer 400. By arranging that the light-shielding ink layer 800 does not overlap with the second transparent adhesive layer 400, there is no overlapping area between the second transparent adhesive layer 400 and the light-shielding ink layer 800. When the second transparent adhesive layer 400 is fixed to the first transparent adhesive layer 300, there is no light-shielding ink layer 800 between the second transparent adhesive layer 400 and the first transparent adhesive layer 300, thereby avoiding a decrease in the bonding force between the second transparent adhesive layer 400 and the first transparent adhesive layer 300 due to the light-shielding ink layer 800, which increases the risk of bubbles being generated between the second transparent adhesive layer 400 and the first transparent adhesive layer 300.

[0059] The second embodiment of the present application provides a method for manufacturing a display module 10, referring to Figure 3 , Figure 5 The display module 10 includes a plane area AA and a curved area BB located outside the plane area AA, the curved area BB includes a plurality of side curved areas BB1 located around the plane area AA and a corner curved area BB2 located between two adjacent side curved areas BB1, and the manufacturing method includes:

[0060] A first transparent adhesive layer 300 is disposed on the light emitting surface of the display panel 100 , wherein the first transparent adhesive layer 300 is located in the corner curved surface area BB2 ;

[0061] Disposing optically transparent resin glue on the cover plate 200 and curing the optically transparent resin glue to form a second transparent glue layer 400 on the cover plate 200, wherein a recessed portion 210 is formed on the cover plate 200, and the optically 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 adhesive layer 400 is fixed to a portion of the first transparent adhesive layer 300 , and the cover plate 200 is fixed to a portion of the first transparent adhesive layer 300 , so that the cover plate 200 is fixed to the display panel 100 .

[0063] The first transparent adhesive layer 300 is arranged on the light-emitting surface of the display panel 100 located in the corner curved surface area BB2, an optically transparent resin glue is arranged on the cover plate 200, and the optically transparent resin glue is cured, so that a second transparent adhesive layer 400 is formed on the cover plate 200, and a recessed portion 210 is formed on the cover plate 200, and the optically transparent resin glue is filled in the recessed portion 210; then the second transparent adhesive layer 400 is fixed to the cover plate 200 and the first transparent adhesive layer 300, so that the cover plate 200 and the cover plate 200 are fixed to each other. The display panel 100 is fixed; that is, a second transparent adhesive layer 400 is separately provided in the corner curved surface area BB2 of the display module 10 corresponding to the cover plate 200 to fill the recessed portion 210 of the cover plate 200, which can reduce the curvature radius of the corner curved surface area BB2 of the display module 10, reduce the bending degree of the module of the portion of the display panel 100 fixed to the cover plate 200, thereby reducing the rebound force of the module of the portion of the display panel 100 fixed to the cover plate 200, and further improve the problem of bubbles generated after the cover plate 200 and the display panel 100 are bonded and fixed.

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

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

[0066] It should be noted that the optically transparent adhesive is in the state of an adhesive film or a film before curing.

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

[0068] It should be noted that optically clear resin glue is a liquid resin that undergoes a chemical reaction during the curing process to become a solid transparent solid. OCR glue is usually in a liquid or semi-fluid state before curing.

[0069] In this embodiment, reference Figure 5 , Figure 7 , the thickness of the second transparent adhesive layer 400 at the side away from the edge of the recessed portion 210 is greater than the thickness of the second transparent adhesive layer 400 at the side close to the edge of the recessed portion 210. Since the curvature of the middle position of the recessed portion 210 is greater than the curvature of the edge position of the recessed portion 210, that is, the depth of the middle position of the recessed portion 210 is greater than the depth of the edge position of the recessed portion 210, when the second transparent adhesive layer 400 is of equal thickness at various positions of the recessed portion 210, the middle position of the recessed portion 210 still has a large curvature radius, resulting in certain limitations in the effect of improving the problem of bubbles. Therefore, by setting the thickness of the side of the second transparent adhesive layer 400 away from the edge of the recessed portion 210 to be greater than the thickness of the side of the second transparent adhesive layer 400 close to the edge of the recessed portion 210, the curvature radius of the middle position of the corner curved surface area BB2 of the display module 10 corresponding to the middle position of the recessed portion 210 can be closer to the curvature radius of the edge position of the corner curved surface area BB2 of the display module 10 corresponding to the edge position of the recessed portion 210, which can further reduce the bending degree of the module of the portion of the display panel 100 fixed to the cover plate 200, thereby further reducing the rebound force of the module of the portion of the display panel 100 fixed to the cover plate 200, and further improving the problem of bubbles generated after the cover plate 200 and the display panel 100 are bonded and fixed.

[0070] In this embodiment, reference Figure 7 In the top view of the display module 10, the second transparent adhesive layer 400 is located in the recessed portion 210. By arranging the second transparent adhesive layer 400 in the recessed portion 210, that is, the second transparent adhesive layer 400 is not arranged in other areas except the recessed portion 210, it is possible to avoid the thickness of the display module 10 being increased due to the second transparent adhesive layer 400.

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

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

[0073] It should be noted that since the second transparent adhesive layer 400 is not a film layer of uniform thickness, the closer the second transparent adhesive layer 400 is to the edge of the recessed portion 210, the smaller the thickness of the second transparent adhesive layer 400 is, and the closer the second transparent adhesive layer 400 is to the middle of the recessed portion 210, the thicker the second transparent adhesive layer 400 is, wherein the thickness of the position where the second transparent adhesive layer 400 touches the edge of the recessed portion 210 is 0.

[0074] In this embodiment, reference 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 solution, the optical transparent adhesive is shorter than the length of the display panel 100, that is, the first transparent adhesive layer 300 is retracted. Since there are certain defects in the bonding between the cover plate 200 and the optical transparent adhesive, and the optical transparent adhesive is subjected to greater force in the Gaussian surface area, the thickness of the optical transparent adhesive is uneven, and the lack of optical transparent adhesive at the edge of the Gaussian surface area has also caused the problem of bubbles. Therefore, the technical solution of the present application arranges the edge of the display panel 100 to be located within the first transparent adhesive layer 300, that is, the first transparent adhesive layer 300 is expanded outward, thereby increasing the length of the first transparent adhesive layer 300, and reducing the risk of bubbles generated due to the first transparent adhesive layer 300 failing to completely fill the area between the display panel 100 and the cover plate 200, thereby further improving the problem of bubbles generated after the cover plate 200 and the display panel 100 are bonded and fixed; at the same time, since the thickness of the transparent adhesive in the middle position of the recessed portion 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.

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

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

[0077] In this embodiment, reference Figure 5, there is 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 does not exceed 0.1um. 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 no more than 0.1um, on the one hand, the length of the first transparent adhesive layer 300 is increased, and the risk of 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 the first transparent adhesive layer 300 overflowing due to the increase in the length of the first transparent adhesive layer 300 is avoided. Preferably, the length of the first spacing a is 0.03um, 0.04um, 0.05um, 0.06um, 0.07um, 0.08um, 0.09um or 0.1um.

[0078] In this embodiment, reference Figure 5 In the top view of the display module 10, the edge of the second transparent adhesive layer 400 is located inside 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 inside 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, the curvature radius of the corner curved surface area BB2 filled with the second transparent adhesive layer 400 can be smoother. 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 an increase in the force on the edge of the cover plate 200 in the corner curved surface area BB2.

[0079] In this embodiment, reference Figure 4 , Figure 5 The display module also includes a supporting function 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 supporting function 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 includes a supporting function layer 500 , a back plate 600 , a display panel 100 , a polarizing layer 700 and a first transparent adhesive layer.

[0081] In this 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 and the cover plate 200 have a greater bonding force than the second transparent adhesive layer 400 and the first transparent adhesive layer 300, thereby reducing the risk of bubbles generated between the cover plate 200 and the second transparent adhesive layer 400.

[0082] In this 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 this embodiment, the display module further includes a light-shielding ink layer 800, which is disposed on a surface of the cover plate 200 facing the display panel 100. In a top view of the display module, the light-shielding ink layer 800 does not overlap with the second transparent adhesive layer 400. By arranging that the light-shielding ink layer 800 does not overlap with the second transparent adhesive layer 400, there is no overlapping area between the second transparent adhesive layer 400 and the light-shielding ink layer 800. When the second transparent adhesive layer 400 is fixed to the first transparent adhesive layer 300, there is no light-shielding ink layer 800 between the second transparent adhesive layer 400 and the first transparent adhesive layer 300, thereby avoiding a decrease in the bonding force between the second transparent adhesive layer 400 and the first transparent adhesive layer 300 due to the light-shielding ink layer 800, which increases the risk of bubbles being generated between the second transparent adhesive layer 400 and the first transparent adhesive layer 300.

[0084] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A display module, characterized in that: The display module comprises a plane area and a curved area located outside the plane area, wherein the curved area comprises a plurality of side curved areas located around the plane area and a corner curved area located between two adjacent side curved areas, and the corner curved area of ​​the display module comprises: 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, wherein the first transparent adhesive layer is 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.

2. The display module according to claim 1, characterized in that: 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, characterized in that: In the 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, characterized in that: In the top view of the display module, the edge of the display panel is located within the first transparent adhesive layer.

5. The display module according to claim 4, characterized in that: 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, characterized in that: In a top view of the display module, an edge of the second transparent adhesive layer is located inside 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, characterized in that: 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.

8. The display module according to claim 1, characterized in that: 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.

9. The display module according to claim 1, characterized in that: The first transparent adhesive layer and the second transparent adhesive layer are made of different materials.

10. A method for manufacturing a display module, characterized in that: The display module includes a plane area and a curved area located outside the plane area, the curved area includes a plurality of side curved areas located around the plane area and a corner curved area located between two adjacent side curved areas, and 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 glue layer on the cover plate, wherein a recessed portion is formed on the cover plate, the optically transparent resin glue fills the recessed portion, and the second transparent glue layer is located in the corner curved surface area; The second transparent adhesive layer is fixed to a portion of the first transparent adhesive layer, and the cover plate is fixed to a portion of the first transparent adhesive layer, so that the cover plate is fixed to the display panel.

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