Display module and preparation method thereof

Abstract

This application provides a display module and its manufacturing method. The method includes depositing a first adhesive layer on the surface of the display panel facing a cover plate, and depositing a second adhesive layer on the surface of the cover plate facing the display panel. The display panel with the first adhesive layer and the cover plate with the second adhesive layer are then bonded together, forming an adhesive layer. This application can reduce the possibility of film layer separation within the display module and improve the reliability of the display module.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display module and its manufacturing method. Background Technology

[0002] Flat panel displays, such as liquid crystal display (LCD) panels, organic light-emitting diode (OLED) panels, and display panels using light-emitting diode (LED) devices, are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, and wide range of applications, becoming the mainstream of display devices. Summary of the Invention

[0003] This application provides a display module and its manufacturing method, which can reduce the possibility of film layer separation inside the display module and improve the reliability of the display module.

[0004] In a first aspect, embodiments of this application provide a method for manufacturing a display module. The method includes depositing a first adhesive layer on the surface of a display panel facing a cover plate, and depositing a second adhesive layer on the surface of the cover plate facing the display panel. The display panel with the first adhesive layer and the cover plate with the second adhesive layer are then bonded together, forming an adhesive layer between the first and second adhesive layers.

[0005] In some embodiments, prior to the step of applying the first adhesive layer to the side surface of the display panel facing the cover plate and the side surface of the cover plate facing the display panel, the method further includes: performing dust removal treatment on the side surface of the display panel facing the cover plate and the side surface of the cover plate facing the display panel.

[0006] In some embodiments, the dust removal process includes a plasma treatment process.

[0007] In some embodiments, forming a first adhesive layer on the side of the display panel facing the cover plate includes: forming a first liquid adhesive layer on the side of the display panel facing the cover plate; and pre-curing the first liquid adhesive layer to form the first adhesive layer.

[0008] In some embodiments, the step of applying a first adhesive layer to the side of the display panel facing the cover plate includes: polishing the first surface of the first adhesive layer facing away from the display panel to reduce the roughness of the first surface.

[0009] In some embodiments, providing a second adhesive layer on the side surface of the cover plate facing the display panel includes: providing a second liquid adhesive layer on the side surface of the cover plate facing the display panel; and pre-curing the second liquid adhesive layer to form the second adhesive layer.

[0010] In some embodiments, the step of applying a second adhesive layer to the side of the cover plate facing the display panel includes: polishing the second surface of the second adhesive layer facing away from the cover plate to reduce the roughness of the second surface.

[0011] In some embodiments, a display panel with a first adhesive layer and a cover plate with a second adhesive layer are bonded together, wherein the first adhesive layer and the second adhesive layer form an adhesive layer, and the thickness of the first adhesive layer and the thickness of the second adhesive layer are the same.

[0012] In some embodiments, both the surface of the display panel facing the cover plate and the surface of the cover plate facing the display panel include a receiving area and a non-receiving area. Depositing a first adhesive layer on the surface of the display panel facing the cover plate includes forming a first adhesive layer in the receiving area of ​​the display panel. Depositing a second adhesive layer on the surface of the cover plate facing the display panel includes forming a second adhesive layer in the receiving area of ​​the cover plate.

[0013] In some embodiments, both the display panel and the cover plate include a plurality of receiving areas and a plurality of non-receiving areas, with the plurality of receiving areas and the plurality of non-receiving areas of the display panel arranged alternately, and the plurality of receiving areas and the plurality of non-receiving areas of the cover plate arranged alternately.

[0014] In some embodiments, bonding a display panel with a first adhesive layer and a cover plate with a second adhesive layer together includes: positioning a receiving area of ​​the display panel opposite to a non-receiving area of ​​the cover plate, and positioning the non-receiving area of ​​the display panel opposite to the receiving area of ​​the cover plate, such that the first adhesive layer formed on the display panel is embedded in the non-receiving area of ​​the cover plate, and the second adhesive layer formed on the cover plate is embedded in the non-receiving area of ​​the display panel.

[0015] In some embodiments, bonding a display panel with a first adhesive layer and a cover plate with a second adhesive layer together includes: positioning the receiving area of ​​the display panel opposite to the receiving area of ​​the cover plate, and positioning the non-receiving area of ​​the display panel opposite to the non-receiving area of ​​the cover plate, so that the first adhesive layer and the second adhesive layer abut against each other.

[0016] In some embodiments, both the side surface of the display panel facing the cover plate and the side surface of the cover plate facing the display panel include a first receiving area and a second receiving area. Depositing the first adhesive layer on the side surface of the display panel facing the cover plate includes: forming a first adhesive portion in the first receiving area of ​​the display panel, forming a second adhesive portion in the second receiving area of ​​the display panel, wherein the thickness of the first adhesive portion is greater than the thickness of the second adhesive portion, and the first and second adhesive portions form the first adhesive layer. Depositing the second adhesive layer on the side surface of the cover plate facing the display panel includes: forming a third adhesive portion in the first receiving area of ​​the cover plate, forming a fourth adhesive portion in the second receiving area of ​​the cover plate, wherein the thickness of the third adhesive portion is greater than the thickness of the fourth adhesive portion, and the third and fourth adhesive portions form the second adhesive layer. Bonding the display panel with the first adhesive layer and the cover plate with the second adhesive layer together includes: bonding the first and fourth adhesive portions together, and bonding the second and third adhesive portions together to form an adhesive layer.

[0017] In some embodiments, a portion of the first adhesive portion is embedded between the third adhesive portion and the fourth adhesive portion, and a portion of the third adhesive portion is embedded between the first adhesive portion and the second adhesive portion.

[0018] In some embodiments, the step of forming a first adhesive layer on the side surface of the display panel facing the cover plate includes: forming a fifth adhesive portion and a plurality of sixth adhesive portions on the side surface of the display panel facing the cover plate, the fifth adhesive portion covering the plurality of sixth adhesive portions and the side surface of the display panel facing the cover plate, the adhesive strength of the sixth adhesive portions being greater than the adhesive strength of the fifth adhesive portion, and the fifth adhesive portion and the plurality of sixth adhesive portions forming the first adhesive layer. The step of forming a second adhesive layer on the side surface of the cover plate facing the display panel includes: forming a seventh adhesive portion and a plurality of eighth adhesive portions on the side surface of the cover plate facing the display panel, the seventh adhesive portion covering the plurality of eighth adhesive portions and the side surface of the display panel facing the cover plate, the adhesive strength of the eighth adhesive portions being greater than the adhesive strength of the seventh adhesive portion, and the seventh adhesive portion and the plurality of eighth adhesive portions forming the second adhesive layer.

[0019] In some embodiments, a plurality of sixth adhesive portions are arranged in an array.

[0020] In some embodiments, a plurality of eighth adhesive portions are arranged in an array.

[0021] In some embodiments, along the thickness direction of the display module, at least a portion of the sixth adhesive portion and at least a portion of the eighth adhesive portion are at least partially overlapped.

[0022] Secondly, embodiments of this application provide a display device, including the display panel in any of the foregoing embodiments.

[0023] This application provides a display module and its manufacturing method and display device. By first forming adhesive layers on the surfaces of the display panel and the cover plate respectively, and then bonding the two adhesive layers together to form an adhesive layer, the display panel and the cover plate are bonded together. This improves the bonding interface force between the display panel and the cover plate and the adhesive layers, thereby reducing the possibility of separation between the display panel and the cover plate, and thus improving the reliability of the display module. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A flowchart illustrating a method for manufacturing a display module as provided in this application embodiment;

[0026] Figure 2 This is a cross-sectional structural diagram of a display module provided in an embodiment of this application;

[0027] Figures 3 to 5 This is a schematic diagram illustrating the process structure of a method for manufacturing a display module according to an embodiment of this application.

[0028] Figure 6 A schematic diagram of a display panel and a cover plate in a display module provided in an embodiment of this application;

[0029] Figure 7 A schematic diagram of a display panel and a cover plate in a display module provided for an embodiment of this application;

[0030] Figures 8 to 13 This is a schematic diagram illustrating the process structure of a method for manufacturing a display module according to an embodiment of this application.

[0031] Marker explanation:

[0032] 100. Display panel; 200. Cover plate; 300. Adhesive layer;

[0033] 10. First adhesive layer; 11. First adhesive portion; 111. First stepped portion; 112. Second stepped portion; 113. First stepped surface; 12. Second adhesive portion; 13. Fifth adhesive portion; 14. Sixth adhesive portion;

[0034] 20. Second adhesive layer; 21. Third adhesive section; 211. Third stepped section; 212. Fourth stepped section; 213. Second stepped surface; 22. Fourth adhesive section; 23. Seventh adhesive section; 24. Eighth adhesive section;

[0035] 30. First liquid adhesive layer; 40. Second liquid adhesive layer; S1. First surface; S2. Second surface;

[0036] AA, containment area; NA, non-containment area; A1, first containment area; A2, second containment area. Detailed Implementation

[0037] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0039] In existing display modules, the display module includes a display panel and a cover plate. The existing cover plate and display panel are connected by an adhesive layer. The assembly is carried out by first covering the cover plate or display panel with the adhesive layer, and then covering the display panel or cover plate with the adhesive layer. However, during the bonding process, the display panel and cover plate are prone to separation, especially in display modules that need to be folded and medium to large-sized display modules, which leads to a decrease in the yield and lifespan of the display module.

[0040] Figure 1 A flowchart illustrating a method for manufacturing a display module according to an embodiment of this application. Figure 2 This is a cross-sectional structural diagram of a display module provided in an embodiment of this application. Figures 3 to 5 This is a schematic diagram illustrating the process structure of a method for manufacturing a display module according to an embodiment of this application.

[0041] In view of this, firstly, please refer to Figures 1 to 3 This application provides a method for manufacturing a display module, comprising the following steps:

[0042] S100, A first adhesive layer 10 is provided on the surface of the display panel 100 facing the cover plate 200.

[0043] Specifically, the display panel 100 has a display surface, and the light-emitting units within the display panel 100 emit light to the outside through the display surface. A first adhesive layer 10 covers the display surface. In some examples, the first adhesive layer 10 may include a liquid optical adhesive. For example, the preparation method of the first adhesive layer 10 includes processes such as coating and UV curing. Optionally, the display panel 100 may include a bending area and non-bending areas. Exemplarily, there are two non-bending areas connected by a bending area, and the two non-bending areas can be bonded together after the bending area is bent. The preparation method in the embodiments of this application can be a method for preparing bending areas, or it can be a method for bonding the entire display panel 100 and the cover plate 200.

[0044] UV curing refers to using ultraviolet light to activate the photosensitizer in optical adhesives, causing a chemical reaction that cures the optical adhesives into the desired shape.

[0045] S200, A second adhesive layer 20 is provided on the surface of the cover plate 200 facing the display panel 100.

[0046] Specifically, the method for preparing the second adhesive layer 20 on the cover plate 200 can be the same as the method for preparing the first adhesive layer 10 on the display panel 100. Optionally, the materials of the first adhesive layer 10 and the second adhesive layer 20 can be the same, or they can be different.

[0047] For example, the first adhesive layer 10 includes a first sub-layer and a second sub-layer, the second adhesive layer 20 includes a third sub-layer and a fourth sub-layer, the outermost surface of the display panel 100 facing the display surface can be an encapsulation layer or a polarizing layer, and the cover plate 200 can be UTG (Ultra-Thin Glass) or CPI (transparent polyimide flexible material). Taking the outermost layer of the display panel 100 facing the display surface as an example, the bonding strength between the first sub-layer and the polarizing layer is greater than that between the second sub-layer and the polarizing layer. This improves the bonding force between the first adhesive layer 10 and the display panel 100 while reducing the manufacturing cost of the first adhesive layer 10. The bonding strength between the fourth sub-layer and the cover plate 200 is greater than that between the third sub-layer and the cover plate 200. This improves the bonding force between the second adhesive layer 20 and the display panel 100 while reducing the manufacturing cost of the second adhesive layer 20. The second and third sub-layers are made of the same material so that the second and third sub-layers can be fused together after the first adhesive layer 10 and the second adhesive layer 20 are bonded in subsequent steps, thereby improving the bonding force between the first adhesive layer 10 and the second adhesive layer 20.

[0048] S300, the display panel 100 with the first adhesive layer 10 and the cover plate 200 with the second adhesive layer 20 are bonded together, and the first adhesive layer 10 and the second adhesive layer 20 form an adhesive layer 300.

[0049] Specifically, the display panel 100 with the first adhesive layer 10 and the cover plate 200 with the second adhesive layer 20 are arranged opposite each other, and after they are aligned, they abut against each other so that the first adhesive layer 10 and the second adhesive layer 20 are bonded together to form an adhesive layer.

[0050] In some embodiments, the first adhesive layer 10 and the second adhesive layer 20 are simultaneously cured by thermosetting. The assembled display panel 100 and cover plate 200 are placed under a heat source or in an environment with a curing temperature so that the first and second layers fuse together to form an adhesive layer 300.

[0051] This application provides a display module that first forms adhesive layers on the surfaces of the display panel 100 and the cover plate 200, and then bonds the two adhesive layers together to form an adhesive layer. This improves the bonding force between the display panel 100 and the cover plate 200 and the adhesive layers, thereby reducing the possibility of separation between the display panel 100 and the cover plate 200 and improving the reliability of the display module.

[0052] In some optional embodiments, the step of applying the first adhesive layer 10 to the surface of the display panel 100 facing the cover plate 200 and the surface of the cover plate 200 facing the display panel 100 respectively further includes:

[0053] S001. Dust removal treatment is performed on the side surface of the display panel 100 facing the cover plate 200 and the side surface of the cover plate 200 facing the display panel 100.

[0054] Optionally, in this embodiment and hereinafter, the surface of the display panel 100 facing the cover plate 200 is taken as the first surface, and the surface of the cover plate 200 facing the display panel 100 is taken as the second surface. Both the first and second surfaces require full-surface dust removal. When the first layer is located in the bending and non-bending areas of the first surface, and the second layer is located in the bending and non-bending areas of the second surface, a single dust removal process is sufficient for the first surface. When the first layer is located in the bending area of ​​the first surface, and the second layer is located in the bending area of ​​the second surface, a third layer can be formed on either the first or second surface. When a third layer is required, the surface on which the third layer is located can undergo two dust removal processes, meaning the first or second layer and the third layer are formed in two separate processes. Alternatively, the first or second layer and the third layer can also be formed in a single process. Optionally, the thickness of the third layer is equal to the thickness of the adhesive layer 300.

[0055] Optionally, the dust removal process includes plasma treatment.

[0056] In some alternative embodiments, please refer to Figure 3 and Figure 4 The first adhesive layer 10 is provided on the surface of the display panel 100 facing the cover plate 200, including:

[0057] S101. A first liquid adhesive layer 30 is provided on the surface of the display panel 100 facing the cover plate 200.

[0058] S102. Pre-curing the first liquid adhesive layer 30 to form the first adhesive layer.

[0059] In step S101, the first liquid adhesive layer 30 can cover the bent and non-bent areas of the display panel 100. After completing step S101, the display panel 100 with the first liquid adhesive layer 30 can be placed under a heat source or in an environment with a first curing temperature to achieve pre-curing of the first liquid adhesive layer 30.

[0060] In step S102, the degree of curing of the first liquid adhesive layer 30 after being subjected to a heat source or a first curing temperature can be less than the degree of curing of the adhesive layer 300, so that the first adhesive layer 10 and the second adhesive layer 20 can fuse together. Optionally, the degree of curing of the first adhesive layer 10 can be changed by controlling the curing temperature and curing time.

[0061] In some alternative embodiments, the step of applying the first adhesive layer 10 to the side surface of the display panel 100 facing the cover plate 200 includes step S103.

[0062] Step S103: Polish the first surface S1 of the first adhesive layer 10 on the side facing away from the display panel 100 to reduce the roughness of the first surface S1.

[0063] In step S103, when the first liquid adhesive layer 30 is cured to form the first adhesive layer 10, the side of the first adhesive layer 10 facing away from the display panel 100 has an uneven structure, which makes the roughness of the first surface S1 relatively large. In the subsequent step of bonding the first adhesive layer 10 and the second adhesive layer 20 together, gaps are easily generated, resulting in air bubbles in the formed adhesive layer. By polishing the first surface S1 of the first adhesive layer 10 in step S103, the roughness of the first surface S1 is reduced, thereby reducing the possibility of air bubbles in the formed adhesive layer and improving the preparation yield.

[0064] In some alternative embodiments, please refer to Figure 3 and Figure 5 The second adhesive layer 20 is provided on the side surface of the cover plate 200 facing the display panel 100, including:

[0065] S201. A second liquid adhesive layer 40 is provided on the surface of the cover plate 200 facing the display panel 100.

[0066] S202. Pre-curing the second liquid adhesive layer 40 to form the second adhesive layer.

[0067] In step S201, the second liquid adhesive layer 40 can cover the bent and non-bent areas of the display panel 100. After completing step S201, the display panel 100 with the second liquid adhesive layer 40 can be placed under a heat source or in an environment with a second curing temperature to achieve pre-curing of the second liquid adhesive layer 40.

[0068] In step S202, the degree of curing of the second liquid adhesive layer 40 after being subjected to a heat source or a second curing temperature can be less than the degree of curing of the adhesive layer 300, so that the first adhesive layer 10 and the second adhesive layer 20 can fuse together. Optionally, the degree of curing of the second adhesive layer 20 can be changed by controlling the curing temperature and curing time.

[0069] In some alternative embodiments, the step of applying a second adhesive layer 20 to the side surface of the cover plate 200 facing the display panel 100 includes step S203.

[0070] Step S203: Polish the second surface S2 of the second adhesive layer 20 on the side facing away from the cover plate 200 to reduce the roughness of the second surface S2.

[0071] In step S203, when the second liquid adhesive layer 40 is cured to form the second adhesive layer 20, the side of the second adhesive layer 20 facing away from the cover plate has an uneven structure, which makes the second surface S2 rough. In the subsequent step of bonding the first adhesive layer 10 and the second adhesive layer 20 together, gaps are easily generated, resulting in air bubbles in the formed adhesive layer. By polishing the second surface S2 of the second adhesive layer 20 in step S103, the roughness of the second surface S2 is reduced, thereby reducing the possibility of air bubbles in the formed adhesive layer and improving the preparation yield.

[0072] Optionally, the first curing temperature and the second curing temperature can be different to specifically improve the bonding strength between the first adhesive layer 10 and the display panel 100 and the bonding strength between the second adhesive layer 20 and the cover plate 200.

[0073] In some alternative embodiments, the display panel 100 with a first adhesive layer 10 and the cover plate 200 with a second adhesive layer 20 are bonded together, wherein the first adhesive layer 10 and the second adhesive layer 20 form an adhesive layer 300 including:

[0074] The thickness of the first adhesive layer 10 is the same as the thickness of the second adhesive layer 20.

[0075] In some embodiments, the first adhesive layer 10 covers the entire first surface, and the second layer covers the entire second surface. After the first adhesive layer 10 and the second adhesive layer 20 are bonded together, the bonding area of ​​the first adhesive layer 10 and the second adhesive layer 20 fuses together to form an adhesive layer, thereby reducing redundant loss of the adhesive layer 300 material and reducing the manufacturing cost.

[0076] It is understood that the thickness of the first adhesive layer 10 and the thickness of the second adhesive layer 20 are the same. "Same thickness" here includes both the two adhesive layers having the same thickness and allowing for a certain degree of thickness difference. For example, if the difference between the thickness of the first adhesive layer and the thickness of the second adhesive layer does not exceed five percent of the total thickness of either the first or second adhesive layer, then the thickness of the first adhesive layer and the thickness of the second adhesive layer are considered to be the same. Of course, in other examples, the percentage of the thickness difference to the total thickness can be other percentage values.

[0077] Figure 6 This is a schematic diagram of a display panel and a cover plate in a display module provided in an embodiment of this application.

[0078] Figure 7 This is a schematic diagram of a display panel and a cover plate in a display module provided in an embodiment of this application.

[0079] Figures 8 to 13 This is a schematic diagram illustrating the process structure of a method for manufacturing a display module according to an embodiment of this application.

[0080] In some alternative embodiments, please refer to Figure 3 , Figures 6 to 9 The display panel 100 and the cover plate 200 both include receiving areas AA and non-receiving areas NA on their respective surfaces facing the display panel 100. Both the display panel 100 and the cover plate 200 include multiple receiving areas AA and multiple non-receiving areas NA, with the multiple receiving areas AA and multiple non-receiving areas NA of the display panel 100 arranged alternately. Similarly, the multiple receiving areas AA and multiple non-receiving areas NA of the cover plate 200 are arranged alternately.

[0081] It is understood that the receiving area AA can be an area with an adhesive layer. For example, the receiving area AA on the surface of the display panel 100 facing the cover plate 200 is an area with an adhesive layer on the surface of the display panel 100 facing the cover plate 200. Similarly, the receiving area AA on the surface of the cover plate 200 facing the display panel 100 is an area with an adhesive layer on the surface of the cover plate 200 facing the display panel 100. The non-receiving area NA can be an area without an adhesive layer. For example, the non-receiving area NA on the surface of the display panel 100 facing the cover plate 200 is an area without an adhesive layer on the surface of the display panel 100 facing the cover plate 200. Similarly, the non-receiving area NA on the surface of the cover plate 200 facing the display panel 100 is an area without an adhesive layer on the surface of the cover plate 200 facing the display panel 100.

[0082] In some embodiments, the number of accommodating areas AA may include one, and non-accommodating areas NA are disposed around the accommodating area. In other embodiments, the number of accommodating areas AA may include multiple, and non-accommodating areas NA separate the multiple accommodating areas. Optionally, the multiple accommodating areas AA and the multiple non-accommodating areas NA may be arranged in an array along a first direction and a second direction.

[0083] Optionally, the receiving area AA of the first surface and the receiving area AA of the second surface can have the same shape or different shapes. For example, both the receiving area AA of the first surface and the receiving area AA of the second surface are rectangular, and both the non-receiving area NA of the first surface and the non-receiving area NA of the second surface are annular. Alternatively, the receiving area AA of the first surface is rectangular, the non-receiving area NA of the first surface is annular, the receiving area AA of the second surface is annular, and the non-receiving area NA of the second surface is rectangular.

[0084] S100, the first adhesive layer 10 is provided on the side surface of the display panel 100 facing the cover plate 200, including:

[0085] S110, A first adhesive layer 10 is formed in the receiving area AA of the display panel 100.

[0086] It is understandable that step S110 is only for the purpose of distinguishing it from steps S101 to S103, and is not a sequential step.

[0087] In some embodiments, steps S101 to S103 may be performed within the accommodating area AA.

[0088] In some examples, a first liquid adhesive layer 30 is formed in the accommodating area AA, and a first adhesive layer 10 is formed after steps S102 and S103.

[0089] In some embodiments, step S101 can be performed in both the accommodating area AA and the non-accommodating area NA, and the first liquid adhesive layer 30 in the accommodating area AA can be pre-cured to remove the first adhesive layer 30 in the non-accommodating area NA. Optionally, the first liquid adhesive layer 30 in the accommodating area AA can be pre-cured by laser curing.

[0090] S200, the second adhesive layer 20 is provided on the side surface of the cover plate 200 facing the display panel 100, including:

[0091] S210, A second adhesive layer 20 is formed in the receiving area AA of the cover plate 200.

[0092] It is understandable that step S210 is only for the purpose of distinguishing it from steps S201 to S203, and is not a sequential step.

[0093] In some embodiments, steps S201 to S203 may be performed within the accommodating area AA.

[0094] In some examples, a second liquid adhesive layer 40 is formed in the accommodating area AA, and the second adhesive layer 20 is formed after steps S202 and S203.

[0095] In some embodiments, step S201 can be performed in both the accommodating region AA and the non-accommodating region NA, and the second liquid adhesive layer 40 in the accommodating region AA can be pre-cured to remove the second liquid adhesive layer 40 in the non-accommodating region NA. Optionally, the second liquid adhesive layer 40 in the accommodating region AA can be pre-cured by laser curing.

[0096] In some alternative embodiments, please refer to Figure 8 The process of bonding the display panel 100 with the first adhesive layer 10 and the cover plate 200 with the second adhesive layer 20 together includes:

[0097] S310, the receiving area AA of the display panel 100 is positioned opposite to the non-receiving area NA of the cover plate 200, and the non-receiving area NA of the display panel 100 is positioned opposite to the receiving area of ​​the cover plate 200, so that the first adhesive layer 10 formed on the display panel 100 is embedded in the non-receiving area NA of the cover plate 200, and the second adhesive layer 20 formed on the cover plate 200 is embedded in the non-receiving area NA of the display panel 100.

[0098] Take, for example, multiple accommodating areas AA and multiple non-accommodating areas NA arranged in an array.

[0099] For example, the receiving area AA of the first surface and the non-receiving area NA of the second surface are configured in a one-to-one correspondence, and the non-receiving area NA of the first surface and the receiving area AA of the second surface are configured in a one-to-one correspondence. That is, the first adhesive layer 10 in each receiving area AA of the first surface is embedded in each non-receiving area NA of the second surface, and the second adhesive layer 20 in each receiving area AA of the second surface is embedded in each non-receiving area NA of the first surface. Optionally, the area of ​​the non-receiving area NA can be larger than the area of ​​the receiving area AA, so that after the first adhesive layer 10 is embedded in the non-receiving area NA, there is a gap between the first adhesive layer 10 and the second adhesive layer 20. The gap can be an overflow space to reduce the risk that some adhesive material will overflow to areas outside the display panel 100 and the cover plate 200 after the first adhesive layer 10 and the second adhesive layer 20 are bonded together.

[0100] For example, multiple receiving areas AA on the first surface are correspondingly configured with a non-receiving area NA on the second surface, and the non-receiving area NA on the first surface is correspondingly configured with multiple receiving areas AA on the second surface. The multiple receiving areas AA form a receiving area AA block, and each receiving area block is correspondingly configured with a non-receiving area NA. Within the receiving area AA block, the multiple receiving areas AA can be spaced apart, so that the receiving area AA block contains multiple spaced first adhesive layers 10, and the gaps can form adhesive overflow spaces. The first adhesive layer 10 in each receiving area AA block on the first surface is embedded into the non-receiving area NA on the second surface, and the second adhesive layer 20 in each receiving area AA block on the second surface is embedded into the non-receiving area NA on the first surface.

[0101] The embodiments of this application, through the above-described implementation methods, facilitate an increase in the contact area between the first adhesive layer 10 and the second adhesive layer 20, enabling the first adhesive layer 10 and the second adhesive layer 20 to form a mutually interlocking structure, thereby further improving the bonding reliability of the formed adhesive layer 300.

[0102] In some alternative embodiments, please refer to Figure 9 The process of bonding the display panel 100 with the first adhesive layer 10 and the cover plate 200 with the second adhesive layer 20 together includes:

[0103] S320, the receiving area AA of the display panel 100 is positioned opposite to the receiving area of ​​the cover plate 200, and the non-receiving area NA of the display panel 100 is positioned opposite to the non-receiving area of ​​the cover plate 200, so that the first adhesive layer 10 and the second adhesive layer 20 abut against each other.

[0104] Optionally, the thickness of the first adhesive layer 10 is 4 μm to 6 μm.

[0105] Take, for example, multiple accommodating areas AA and multiple non-accommodating areas NA arranged in an array.

[0106] For example, the accommodating area AA of the first surface and the accommodating area AA of the second surface are arranged in a one-to-one correspondence, and the non-accommodating area NA of the first surface and the non-accommodating area NA of the second surface are arranged in a one-to-one correspondence. That is, the first adhesive layer 10 in each accommodating area AA of the first surface and the second adhesive layer 20 in each accommodating area AA of the second surface are abutted together. The non-accommodating area NA can form an overflow space. When the first adhesive layer 10 and the second adhesive layer 20 fuse together, a portion flows into the overflow space to fill the non-accommodating area NA and thus form an adhesive layer 300. This helps to reduce the thickness of the formed adhesive layer 300, thereby reducing the overall thickness of the display module.

[0107] For example, a plurality of accommodating areas AA on the first surface are correspondingly configured with one accommodating area AA on the second surface; or, one accommodating area AA on the first surface is correspondingly configured with a plurality of accommodating areas AA on the second surface.

[0108] For example, multiple accommodating areas AA on the first surface are correspondingly arranged with one accommodating area AA on the second surface, that is, multiple first adhesive layers 10 on the first surface and one second adhesive layer 20 on the second surface are abutting each other. The gaps between the multiple first adhesive layers 10 and the non-accommodating area NA can form an overflow space. When the first adhesive layer 10 and the second adhesive layer 20 fuse together, a portion flows into the overflow space to fill the non-accommodating area NA, thereby forming an adhesive layer 300. This helps to reduce the thickness of the formed adhesive layer 300, thereby reducing the overall thickness of the display module.

[0109] In some alternative embodiments, please refer to Figure 10 The display panel 100 has a first receiving area A1 and a second receiving area A2 on the side surface of the cover plate 200 facing the display panel 100 and on the side surface of the cover plate facing the display panel 100.

[0110] Optionally, the first accommodating area A1 and the second accommodating area A2 can be set at intervals, and a non-accommodating area NA can be provided between the first accommodating area A1 and the second accommodating area A2.

[0111] Optionally, the first accommodating area A1 and the second accommodating area A2 can be interlocked.

[0112] For example, both the first accommodating area A1 and the second accommodating area A2 have an opening and a surrounding portion that encloses the opening. The opening of the first accommodating area A1 contains a portion of the surrounding portion of the second accommodating area A2, and the opening of the second accommodating area A2 contains a portion of the surrounding portion of the first accommodating area A1.

[0113] S100, the first adhesive layer 10 is provided on the side surface of the display panel 100 facing the cover plate 200, including:

[0114] S120. A first adhesive portion 11 is formed in the first accommodating area A1 of the display panel 100, and a second adhesive portion 12 is formed in the second accommodating area A2 of the display panel 100. The thickness of the first adhesive portion 11 is greater than the thickness of the second adhesive portion 12. The first adhesive portion 11 and the second adhesive portion 12 form a first adhesive layer 10.

[0115] Optionally, the first adhesive portion 11 and the second adhesive portion 12 can be formed in a single preparation process.

[0116] For example, a first liquid adhesive layer 30 is formed on the display panel 100, and the first accommodating area A1 and the second accommodating area A2 are irradiated by laser curing, and the first adhesive portion 11 and the second adhesive portion 12 with different thicknesses are formed by controlling factors such as light intensity and light time.

[0117] In some other embodiments, the first adhesive portion 11 and the second adhesive portion 12 can also be formed by two preparation processes.

[0118] Optionally, there may be multiple first receiving areas A1, and the number of first adhesive parts 11 and the number of first receiving areas A1 are set in a one-to-one correspondence.

[0119] Optionally, there may be multiple second receiving areas A2, and the number of second adhesive parts 12 and the number of second receiving areas A2 may be set in a one-to-one correspondence.

[0120] Optionally, the shape and thickness of the plurality of first adhesive portions 11 can be the same, or of course, they can be different.

[0121] Optionally, the shape and thickness of the plurality of second adhesive portions 12 can be the same, or of course, they can be different.

[0122] S200, the second adhesive layer 20 is provided on the side surface of the cover plate 200 facing the display panel 100, including:

[0123] S220, a third adhesive portion 21 is formed in the first receiving area A1 of the cover plate 200, and a fourth adhesive portion 22 is formed in the second receiving area A2 of the cover plate 200. The thickness of the third adhesive portion 21 is greater than the thickness of the fourth adhesive portion 22. The third adhesive portion 21 and the fourth adhesive portion 22 form a second adhesive layer 20.

[0124] Optionally, the preparation process of the third adhesive part 21 and the fourth adhesive part 22 can be the same as the preparation process of the first adhesive part 11 and the second adhesive part 12.

[0125] Optionally, the thickness of the first adhesive portion 11 may be equal to, greater than or less than the thickness of the third adhesive portion 21.

[0126] Optionally, the thickness of the second adhesive portion 12 may be equal to, greater than or less than the thickness of the fourth adhesive portion 22.

[0127] Optionally, there may be multiple first receiving areas A1, and the number of third adhesive parts 21 may correspond one-to-one with the number of first receiving areas A1.

[0128] Optionally, there may be multiple second receiving areas A2, and the number of fourth adhesive parts 22 may correspond one-to-one with the number of second receiving areas A2.

[0129] Optionally, the shape and thickness of the plurality of fourth adhesive portions 22 can be the same, or of course, they can be different.

[0130] Optionally, the shape and thickness of the plurality of second adhesive portions 12 can be the same, or of course, they can be different.

[0131] S300, bonding the display panel 100 with the first adhesive layer 10 and the cover plate 200 with the second adhesive layer 20 together includes:

[0132] S330, the first adhesive part 11 and the fourth adhesive part 22 are bonded together, and the second adhesive part 12 and the third adhesive part 21 are bonded together to form an adhesive layer 300.

[0133] Optionally, the sum of the thicknesses of the first adhesive portion 11 and the fourth adhesive portion 22 is equal to the sum of the thicknesses of the second adhesive portion 12 and the third adhesive portion 21.

[0134] Because the first adhesive portion 11 and the second adhesive portion 12 have different thicknesses, and the third adhesive portion 21 and the fourth adhesive portion 22 have different thicknesses, the adhesive portions of different thicknesses adhere to each other during the bonding process of the display panel 100 and the cover plate 200. The bonding surface of the first adhesive layer 10 and the second adhesive layer 20 changes from a complete plane to multiple small bonding surfaces, thereby reducing the possibility of bonding surface separation due to insufficient bonding strength. Furthermore, the mutual bonding of adhesive portions of different thicknesses can also reduce the overall thickness of the adhesive layer 300.

[0135] In some alternative embodiments, please refer to Figure 11 A portion of the first adhesive portion 11 is embedded between the third adhesive portion 21 and the fourth adhesive portion 22, and a portion of the third adhesive portion 21 is embedded between the first adhesive portion 11 and the second adhesive portion 12.

[0136] Optionally, the shape of the first adhesive portion 11 along its thickness direction can be stepped. For example, the first adhesive portion 11 includes a first stepped portion 111 and a second stepped portion 112 stacked along its thickness direction. The first stepped portion 111 includes a first stepped surface 113, and the second stepped portion 112 is disposed on the first stepped surface 113, with the orthographic projection of the second stepped portion 112 onto the first stepped surface 113 located within the first stepped surface 113. During the process of bonding the display panel 100 and the cover plate 200 together, the first stepped surface 113 and the fourth adhesive portion 22 are bonded together, and the second stepped portion 112 is embedded between the third adhesive portion 21 and the fourth adhesive portion 22. Optionally, a non-accommodating area NA is provided between the third adhesive portion 21 and the fourth adhesive portion 22, and the second stepped portion 112 is embedded into the non-accommodating area NA. Further, the sidewall of the second stepped portion 112 can abut against the sidewall of at least one of the third adhesive portion 21 and the fourth adhesive portion 22.

[0137] Optionally, the shape of the third adhesive portion 21 along its thickness direction can be stepped. For example, the third adhesive portion 21 includes a third stepped portion 211 and a fourth stepped portion 212 stacked along its thickness direction. The third stepped portion 211 includes a second stepped surface 213, and the fourth stepped portion 212 is disposed on the second stepped surface 213, with its orthographic projection on the second stepped surface 213 located within the second stepped surface 213. During the process of bonding the display panel 100 and the cover plate 200 together, the second stepped surface 213 and the second adhesive portion 12 are bonded together, and the fourth stepped portion 212 is embedded between the first adhesive portion 11 and the second adhesive portion 12. Optionally, a non-accommodating area NA is provided between the first adhesive portion 11 and the second adhesive portion 12, and the fourth stepped portion 212 is embedded in the non-accommodating area NA. Further, the sidewall of the fourth stepped portion 212 can abut against the sidewall of at least one of the first adhesive portion 11 and the second adhesive portion 12.

[0138] In this embodiment, the above-mentioned arrangement helps to increase the bonding area of ​​the first adhesive layer 10 and the second adhesive layer 20, further improve the bonding strength of the first adhesive layer 10 and the second adhesive layer 20, and improve the reliability of the display module.

[0139] In some alternative embodiments, please refer to Figure 12 and Figure 13 The step of applying the first adhesive layer 10 to the side surface of the display panel 100 facing the cover plate 200 includes step S130.

[0140] Step S130: A fifth adhesive portion 13 and a plurality of sixth adhesive portions 14 are provided on the side surface of the display panel 100 facing the cover plate 200. The fifth adhesive portion 13 covers the plurality of sixth adhesive portions 14 and the side surface of the display panel 100 facing the cover plate 200. The bonding strength of the sixth adhesive portion 14 is greater than the bonding strength of the fifth adhesive portion 13. The fifth adhesive portion 13 and the plurality of sixth adhesive portions 14 form a first adhesive layer.

[0141] Optionally, the fifth adhesive portion 13 can be a single film layer. After multiple sixth adhesive portions 14 are formed on the surface of the display panel 100 facing the cover plate 200, the entire film layer covers the fifth adhesive portion 13 to increase the bonding area between the fifth adhesive portion 13 and the display panel 100, while also improving the bonding strength of the sixth adhesive portion 14 to both the fifth adhesive portion 13 and the display panel 100, thereby further improving the bonding strength of the adhesive layer. Optionally, the fifth adhesive portion 13 and the sixth adhesive portion 14 can also be both disposed within the receiving area of ​​the display panel 100, with the fifth adhesive portion 13 covering the sixth adhesive portion 14 and the receiving area surface not covered by the sixth adhesive portion 14.

[0142] The step of applying a second adhesive layer to the surface of the cover plate 200 facing the display panel 100 includes step S230.

[0143] Step S230: A seventh adhesive portion 23 and a plurality of eighth adhesive portions 24 are provided on the side surface of the cover plate 200 facing the display panel 100. The seventh adhesive portion 23 covers the plurality of eighth adhesive portions 24 and the side surface of the display panel 100 facing the cover plate 200. The bonding strength of the eighth adhesive portion 24 is greater than the bonding strength of the seventh adhesive portion 23. The seventh adhesive portion 23 and the plurality of eighth adhesive portions 24 form a second adhesive layer.

[0144] Optionally, the seventh adhesive portion 23 can be a single film layer. After multiple eighth adhesive portions 24 are prepared on the surface of the display panel 100 facing the cover plate 200, the entire film layer covers the seventh adhesive portion 23 to increase the bonding area between the seventh adhesive portion 23 and the display panel 100, while also improving the bonding strength of the eighth adhesive portions 24 to the seventh adhesive portion 23 and the display panel 100, thereby further improving the bonding strength of the adhesive layer. Optionally, the seventh adhesive portion 23 and the eighth adhesive portions 24 can also be both disposed within the receiving area of ​​the display panel 100, with the seventh adhesive portion 23 covering the eighth adhesive portion 24 and the receiving area surface not covered by the eighth adhesive portion 24.

[0145] Optionally, multiple sixth adhesive portions 14 are arranged in an array.

[0146] Optionally, multiple eighth adhesive sections 24 are arranged in an array.

[0147] Exemplarily, a plurality of sixth adhesive portions 14 are arranged in an array along a first direction and a second direction. A plurality of eighth adhesive portions 24 are arranged in an array along the first direction and the second direction. In some embodiments, the sixth adhesive portions 14 and the eighth adhesive portions 24 may not overlap in the thickness direction of the display module.

[0148] Optionally, along the thickness direction of the display module, at least a portion of the sixth adhesive portion 14 and at least a portion of the eighth adhesive portion 24 are at least partially overlapped.

[0149] For example, the projections of the plurality of sixth adhesive portions 14 in the thickness direction of the display module are arranged to overlap one-to-one with the projections of the plurality of eighth adhesive portions 24 in the thickness direction. Alternatively, the projections of the plurality of sixth adhesive portions 14 in the thickness direction of the display module are arranged to overlap one-to-one with the projections of the plurality of eighth adhesive portions 24 in the thickness direction. Of course, it is also possible that the projections of a portion of the plurality of sixth adhesive portions 14 in the thickness direction of the display module are arranged to overlap one-to-one with the projections of a portion of the plurality of eighth adhesive portions 24 in the thickness direction. Alternatively, the projections of a portion of the plurality of sixth adhesive portions 14 in the thickness direction of the display module are arranged to overlap one-to-one with the projections of a portion of the plurality of eighth adhesive portions 24 in the thickness direction.

[0150] Optionally, the projected area of ​​the sixth adhesive portion 14 along the thickness direction and the projected area of ​​the eighth adhesive portion 24 along the thickness direction are the same.

[0151] Optionally, the projected area of ​​the sixth adhesive part 14 along the thickness direction and the projected area of ​​the eighth adhesive part 24 along the thickness direction are different.

[0152] For example, the projected area of ​​the sixth adhesive portion 14 along the thickness direction and the projected area of ​​the eighth adhesive portion 24 along the thickness direction are both larger than the other. For instance, the projected area of ​​the sixth adhesive portion 14 along the thickness direction is larger than the projected area of ​​the eighth adhesive portion 24 along the thickness direction.

[0153] The second aspect of this application also provides a display module, which is manufactured using the manufacturing method of any of the first aspects of the above-described embodiments. Since the display device provided in the second aspect of this application is manufactured using the manufacturing method of any of the first aspects of the above-described embodiments, the display module provided in the second aspect of this application has the beneficial effects of the manufacturing method of any of the first aspects of the above-described embodiments, which will not be elaborated further here.

[0154] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0155] While the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit the invention. Any person skilled in the art to which this application pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of protection of this application shall still be determined by the scope defined in the appended claims.

[0156] The above description is merely a specific embodiment of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, substitutions for other connection methods described above can be made by referring to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A method for manufacturing a display module, characterized by, The preparation method includes: A first adhesive layer is provided on the surface of the display panel facing the cover plate; providing the first adhesive layer on the surface of the display panel facing the cover plate includes: A first liquid adhesive layer is provided on the side surface of the display panel facing the cover plate; The first liquid adhesive layer is pre-cured to form a first adhesive layer. The degree of curing of the pre-curing is less than the degree of curing of the subsequently formed adhesive layer. The first adhesive layer includes a first sub-layer and a second sub-layer arranged in a direction away from the display panel. The adhesive strength between the first sub-layer and the display panel is greater than the adhesive strength between the second sub-layer and the display panel. A second adhesive layer is provided on the surface of the cover plate facing the display panel; providing the second adhesive layer on the surface of the cover plate facing the display panel includes: A second liquid adhesive layer is provided on the side surface of the cover plate facing the display panel; The second liquid adhesive layer is pre-cured to form a second adhesive layer. The degree of curing of the pre-cured layer is less than the degree of curing of the subsequently formed adhesive layer. The second adhesive layer includes a fourth sub-layer and a third sub-layer arranged in a direction away from the cover plate. The adhesive strength between the fourth sub-layer and the cover plate is greater than the adhesive strength between the third sub-layer and the cover plate. The second sub-layer and the third sub-layer are made of the same material. The display panel with the first adhesive layer and the cover plate with the second adhesive layer are bonded together, and the first adhesive layer and the second adhesive layer are cured simultaneously, so that the first adhesive layer and the second adhesive layer fuse together to form an adhesive layer.

2. The preparation method according to claim 1, characterized in that, Before the step of applying the first adhesive layer to the side surface of the display panel facing the cover plate and the side surface of the cover plate facing the display panel, the method further includes: Dust removal treatment is performed on the side surface of the display panel facing the cover plate and the side surface of the cover plate facing the display panel.

3. The preparation method according to claim 2, characterized in that, The dust removal process includes plasma treatment.

4. The method of claim 1, wherein, The step of applying a first adhesive layer to the surface of the display panel facing the cover plate includes: The first surface of the first adhesive layer facing away from the display panel is polished to reduce the roughness of the first surface.

5. The preparation method according to claim 1, characterized in that, The step of applying a second adhesive layer to the side surface of the cover plate facing the display panel includes: The second surface of the second adhesive layer on the side opposite to the cover plate is polished to reduce the roughness of the second surface.

6. The method of claim 1, wherein, The display panel with the first adhesive layer and the cover plate with the second adhesive layer are bonded together, wherein the first adhesive layer and the second adhesive layer form an adhesive layer comprising: The thickness of the first adhesive layer is the same as the thickness of the second adhesive layer.

7. The preparation method according to claim 1, characterized in that, The display panel has a receiving area and a non-receiving area on the side surface facing the cover plate and on the side surface of the cover plate facing the display panel. The first adhesive layer is formed on the side of the display panel facing the cover plate, comprising: The first adhesive layer is formed in the receiving area of ​​the display panel; The second adhesive layer is provided on the side surface of the cover plate facing the display panel, including: The second adhesive layer is formed in the receiving area of ​​the cover plate.

8. The preparation method according to claim 7, characterized in that, Both the display panel and the cover plate include a plurality of receiving areas and a plurality of non-receiving areas. The plurality of receiving areas and the plurality of non-receiving areas of the display panel are arranged alternately, and the plurality of receiving areas and the plurality of non-receiving areas of the cover plate are arranged alternately.

9. The preparation method according to claim 7, characterized in that, Bonding the display panel with the first adhesive layer and the cover plate with the second adhesive layer together includes: The receiving area of ​​the display panel is positioned opposite to the non-receiving area of ​​the cover plate, and the non-receiving area of ​​the display panel is positioned opposite to the receiving area of ​​the cover plate, so that the first adhesive layer formed on the display panel is embedded in the non-receiving area of ​​the cover plate, and the second adhesive layer formed on the cover plate is embedded in the non-receiving area of ​​the display panel.

10. The method of claim 7, wherein, Bonding the display panel with the first adhesive layer and the cover plate with the second adhesive layer together includes: The receiving area of ​​the display panel is positioned opposite to the receiving area of ​​the cover plate, and the non-receiving area of ​​the display panel is positioned opposite to the non-receiving area of ​​the cover plate, so that the first adhesive layer and the second adhesive layer abut against each other.

11. The production method according to claim 1 or 10, characterized by, The display panel has a first receiving area and a second receiving area on the side surface facing the cover plate and on the side surface of the cover plate facing the display panel. The first adhesive layer is formed on the side of the display panel facing the cover plate, comprising: A first adhesive portion is formed in the first accommodating area of ​​the display panel, and a second adhesive portion is formed in the second accommodating area of ​​the display panel. The thickness of the first adhesive portion is greater than the thickness of the second adhesive portion, and the first adhesive portion and the second adhesive portion form the first adhesive layer. The second adhesive layer is provided on the side surface of the cover plate facing the display panel, including: A third adhesive portion is formed in the first receiving area of ​​the cover plate, and a fourth adhesive portion is formed in the second receiving area of ​​the cover plate. The thickness of the third adhesive portion is greater than the thickness of the fourth adhesive portion, and the third adhesive portion and the fourth adhesive portion form the second adhesive layer. Bonding the display panel with the first adhesive layer and the cover plate with the second adhesive layer together includes: The first adhesive portion and the fourth adhesive portion are bonded together, and the second adhesive portion and the third adhesive portion are bonded together to form the adhesive layer.

12. The method of claim 11, wherein, A portion of the first adhesive portion is embedded between the third adhesive portion and the fourth adhesive portion, and a portion of the third adhesive portion is embedded between the first adhesive portion and the second adhesive portion.

13. The method of claim 1, wherein, The step of applying a first adhesive layer to the surface of the display panel facing the cover plate includes: A fifth adhesive portion and a plurality of sixth adhesive portions are provided on the side surface of the display panel facing the cover plate. The fifth adhesive portion covers the plurality of sixth adhesive portions and the side surface of the display panel facing the cover plate. The adhesive strength of the sixth adhesive portion is greater than that of the fifth adhesive portion. The fifth adhesive portion and the plurality of sixth adhesive portions form the first adhesive layer. The step of applying a second adhesive layer to the side surface of the cover plate facing the display panel includes: A seventh adhesive portion and a plurality of eighth adhesive portions are provided on the side surface of the cover plate facing the display panel. The seventh adhesive portion covers the plurality of eighth adhesive portions and the side surface of the display panel facing the cover plate. The adhesive strength of the eighth adhesive portion is greater than that of the seventh adhesive portion. The seventh adhesive portion and the plurality of eighth adhesive portions form the second adhesive layer.

14. The preparation method according to claim 13, characterized in that, The plurality of sixth adhesive parts are arranged in an array.

15. The preparation method according to claim 13, characterized in that, The plurality of eighth adhesive parts are arranged in an array.

16. The method of claim 13, wherein, Along the thickness direction of the display module, at least a portion of the sixth adhesive portion and at least a portion of the eighth adhesive portion overlap.

17. A display module, characterized in that, It is prepared by the preparation method according to any one of claims 1 to 16.

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