Display module, preparation method thereof and display device

Abstract

The application provides a display module, a preparation method thereof and a display device. The display module comprises a display panel, a through hole and a barrier structure. The display panel comprises a display area and an opening area, and the display area at least partially surrounds the opening area. The through hole is located in the opening area and penetrates the display panel. The barrier structure is located in the opening area and is arranged around the through hole. The barrier structure is used for blocking light and water vapor. The display module provided by the application is provided with the barrier structure. The barrier structure is located between the through hole and the display area, which can prevent the propagation of light and the penetration of water and oxygen between the through hole and the display area. On the one hand, the barrier structure blocks the propagation of light emitted from the display panel towards the sidewall of the through hole, thereby avoiding the light leakage phenomenon of the through hole. On the other hand, the barrier structure blocks external light, thereby avoiding the influence of the display effect caused by the penetration of the light through hole into the display area of the display panel. Therefore, the provision of the barrier structure is conducive to improving the shooting quality of the photosensitive element and the user experience, and also improves the display performance.

Description

Technical Field

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

[0002] In recent years, flexible OLED (Organic Light-Emitting Diode) displays have been increasingly used to improve the appearance and display effect of monitors. OLED (Organic Light-Emitting Diode) is an active light-emitting device with a sandwich structure consisting of multiple organic layers and electrodes on both sides. Currently, AMOLED (Active-matrix organic light-emitting diode) based displays have been commercialized in fields such as smartphones, watches, and laptops.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a display module and its manufacturing method, as well as a display device, which improves the ability to block light and water vapor.

[0005] For the purposes described above, this application provides a display module, including:

[0006] A display panel includes a display area and an opening area, wherein the display area at least partially surrounds the opening area;

[0007] A through-hole is located in the opening area and extends through the display panel;

[0008] A barrier structure is located in the opening area and arranged around the through hole, the barrier structure being used to block light and water vapor.

[0009] In one embodiment, the barrier structure includes a cutting groove and a functional adhesive, the functional adhesive being filled in the cutting groove;

[0010] Preferably, the cutting groove includes an annular groove structure surrounding the through hole;

[0011] Preferably, the width of the cutting groove is between 20µm and 1mm.

[0012] In one embodiment, the display module includes a barrier portion located in the opening area and disposed between the through hole and the barrier structure;

[0013] Preferably, the barrier portion includes an annular structure surrounding the through hole.

[0014] In one embodiment, the cutting groove is set at a preset angle between its extending direction on the first cross-section and the display panel, wherein the first cross-section is perpendicular to the plane in which the display panel is located;

[0015] Preferably, the preset angle is greater than or equal to 10 degrees and less than or equal to 90 degrees.

[0016] In one embodiment, the functional adhesive includes a single-layer structure or a multi-layer structure;

[0017] Preferably, the functional adhesive includes a waterproof vapor layer and a light-absorbing layer;

[0018] Preferably, the functional adhesive includes at least one of silicone adhesive, epoxy adhesive, or acrylic adhesive;

[0019] Preferably, the functional adhesive includes a black adhesive.

[0020] In one embodiment, the display module further includes a composite tape layer disposed on the backlight side of the display panel, and one end of the cutting groove is disposed on the composite tape layer;

[0021] Preferably, the cutting groove is a conical annular groove structure, and the orthographic projection of the end of the cutting groove near the composite tape layer on the composite tape layer is located inside the orthographic projection of the end of the cutting groove away from the composite tape layer on the composite tape layer.

[0022] Preferably, the display module includes a cover plate, which is disposed on the light-emitting side of the display panel;

[0023] Preferably, the cover plate at least covers the display panel, the through hole, and the barrier structure;

[0024] Preferably, the display module includes a polarizing layer, the polarizing layer is located between the display panel and the cover plate, and the through hole penetrates the polarizing layer;

[0025] Preferably, the display module includes an optical adhesive layer located between the cover plate and the display panel, and the through hole penetrates the optical adhesive layer;

[0026] Preferably, the display module includes a support layer located on the side of the display panel opposite to the cover plate, and the through hole penetrates the support layer. Based on the same inventive concept, this application also discloses a method for manufacturing a display module, which includes the following steps:

[0027] A display module to be cut is provided, the display module including a display panel;

[0028] Cut a groove in the opening area of ​​the display panel and inject functional adhesive into the groove to form a barrier structure;

[0029] A through hole is cut into the barrier structure to penetrate the display panel.

[0030] In one embodiment, after the functional adhesive is injected into the cutting groove, the functional adhesive is cured to form the barrier structure.

[0031] Preferably, injecting the functional adhesive into the cutting groove includes:

[0032] The functional adhesive is injected into the cutting groove using inkjet printing, screen printing, or a sealing spray valve.

[0033] Preferably, the curing of the functional adhesive includes:

[0034] The functional adhesive is cured using either heat curing or ultraviolet curing.

[0035] Based on the same inventive concept, this application also discloses a display device, which includes the display module described in any of the above claims.

[0036] Compared with the prior art, the display module provided in this application, by setting a barrier structure between the through hole and the display area, can prevent the propagation of light and the transmission of water and oxygen between the through hole and the display area. The barrier structure blocks the light emitted from the display panel from propagating toward the side wall of the through hole, thus avoiding light leakage from the through hole and affecting its light transmittance.

[0037] At the same time, the barrier structure can also prevent water vapor and oxygen from seeping into the display area of ​​the display panel through the through holes, avoiding display defects such as dark spots and improving display performance. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a related display module;

[0040] Figure 2 This is a schematic diagram of the layer structure of a related display module;

[0041] Figure 3 This is a schematic diagram of a display module in one embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the layer structure of the display module in one embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the layer structure of the display module in another embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the layer structure of the display module in another embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the layer structure of the display module in another embodiment of this application;

[0046] Figure 8 This is a schematic diagram of a display module in another embodiment of this application;

[0047] Figure 9 This is a schematic diagram of the layer structure of the display module in another embodiment of this application;

[0048] Figure 10 This is a schematic diagram of the layer structure of the display module in another embodiment of this application;

[0049] Figure 11 This is a schematic flowchart of a method for preparing a display module in one embodiment of this application.

[0050] Marker explanation:

[0051] 100. Display module; 10. Display panel; 101. Display area; 102. Opening area; 103. Light-emitting device; 11. Through hole; 12. Barrier structure; 121. Cutting groove; 122. Functional adhesive; 13. Barrier part; 14. Polarizing layer; 15. Support layer; 16. Optical adhesive layer; 17. Composite tape layer; 18. Cover plate. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0053] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0054] Active matrix organic light-emitting diode (OLED) panels are widely used in mobile phones, wearable devices, and other fields due to their flexibility and foldability. To maximize the display size of mobile phones, punch-hole or under-display screens are currently the main technologies used, which involve punching holes in the active area to achieve a higher screen-to-body ratio or specific functions, such as an under-display camera.

[0055] Figure 1 , Figure 2 A related display module 100 is provided, which includes a display panel 10 with a through-hole 11 extending vertically for housing a camera. The display panel 10 includes a light-emitting device 103. The inventors have discovered that because the light-emitting device 103 is located close to the through-hole 11, light leaks out through the through-hole 11 when the display panel 10 emits light through the light-emitting device 103, causing light leakage and affecting the light transmittance of the through-hole 11. Furthermore, since the camera needs to be placed below the through-hole 11, its resistance to moisture is also a key consideration. Existing display modules 100 suffer from light leakage and poor moisture resistance.

[0056] Based on this, this application provides a display module and its manufacturing method, as well as a solution for a display device, to solve the above problems.

[0057] Reference Figure 3 , Figure 4This application provides a display module 100, which includes a display panel 10, a through hole 11, and a barrier structure 12. The display panel 10 includes a display area 101 and an opening area 102. The display area 101 is at least partially surrounding the opening area 102, that is, the display area 101 completely or partially surrounds the opening area 102. The through hole 11 is located in the opening area 102 and penetrates the display panel 10. The barrier structure 12 is located in the opening area 102 and surrounds the through hole 11, wherein the barrier structure 12 is used to block light and moisture.

[0058] The display module 100 provided in this application embodiment, by setting a barrier structure 12 located between the through hole 11 and the display area 101, can prevent light propagation and water and oxygen transmission between the through hole 11 and the display area 101. On the one hand, the barrier structure 12 blocks the light emitted by the light-emitting device 103 in the display panel 10 from propagating to the sidewall of the through hole 11, avoiding light leakage from the through hole 11, reducing the impact on the light transmittance of the through hole 11, and improving the shooting quality of the photosensitive element. In addition, the barrier structure 12 can also prevent water vapor and oxygen from seeping into the display area 101 of the display panel 10 from the through hole 11, avoiding display defects such as dark spots.

[0059] For example, the through hole 11 is a round hole, and a camera can be installed in the through hole 11. The camera receives external light through the through hole 11 to obtain an image of the outside of the display panel 10.

[0060] Continue to refer to Figure 3 , Figure 4 In one embodiment, the barrier structure 12 includes a cutting groove 121 and a functional adhesive 122, with the functional adhesive 122 filling the cutting groove 121. The barrier structure 12 is formed by cutting the cutting groove 121 in the opening area 102 of the display panel 10 and filling the cutting groove 121 with the functional adhesive 122. This process is simple and has no additional impact on the product. Furthermore, the functional adhesive 122 can absorb the impact of external forces on the sidewalls during the subsequent cutting of the through-hole 11, reducing the impact during the cutting of the through-hole 11 and preventing cracks in the film structure of the display module 100.

[0061] Preferably, a cutting groove 121 is formed in the opening area 102 by laser cutting, with the laser irradiation direction from the light-emitting side of the display panel 10 to the backlight side of the display panel 10. Specifically, the functional adhesive 122 has the functions of black light absorption and water vapor prevention. The cutting groove 121 is an annular groove structure surrounding the through hole 11, and in the first cross-section perpendicular to the display panel 10, the width direction of the cutting groove 121 is perpendicular to its length extension direction.

[0062] Preferably, the width of the cutting groove 121 ranges from 20µm to 1mm. For example, the width of the cutting groove 121 can be 20µm, 100µm, 500µm, 700µm, 1mm, etc., and the specific value can be selected according to the performance of the adhesive.

[0063] Continue to refer to Figure 3 , Figure 4 In one embodiment, the display module 100 includes a barrier portion 13 located in the opening area 102 and between the through hole 11 and the barrier structure 12. The barrier portion 13 is positioned between the through hole 11 and the barrier structure 12, ensuring that the size of the through hole 11 is smaller than the size of the barrier portion 13. When the through hole 11 is cut, the barrier portion 13 prevents the functional adhesive 122 from diffusing into the through hole 11, ensuring effective adhesive application, and also prevents damage to the barrier structure 12 during the cutting and fabrication of the through hole 11.

[0064] Preferably, the barrier portion 13 is an annular structure surrounding the through hole 11. The annular barrier portion 13 provides omnidirectional isolation between the inner through hole 11 and the outer barrier structure 12, preventing mutual interference between the through hole 11 and the barrier structure 12 during the cutting process.

[0065] Preferably, the through hole 11 is formed in the barrier structure 12 by laser cutting.

[0066] Reference Figure 4 In one embodiment, the cutting groove 121 is set at a preset angle α between the length extension direction of the first cross section and the display panel 10, wherein the plane of the first cross section is perpendicular to the plane of the display panel 10.

[0067] Preferably, the preset angle α is greater than or equal to 10 degrees and less than or equal to 90 degrees. Here, the preset angle α refers to the angle between the extending direction of the cutting groove 121 and the display panel 10. The size of the preset angle α affects the light-shielding range of the blocking structure 12; the smaller the preset angle α, the larger the light-shielding range of the blocking structure 12.

[0068] For example, the preset angle 'a' can be 10 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, etc. The specific size of the preset angle 'a' can be selected according to the needs of the display module 100.

[0069] Preferably, the end of the cutting groove 121 near the light-emitting surface of the display panel 10 is larger than the end of the cutting groove 121 near the backlight surface of the display panel 10. Specifically, the cutting groove 121 is a conical annular groove structure, with the light-emitting side of the display panel 10 as the upper side and the backlight side as the lower side, so the upper end of the cutting groove 121 is larger than the lower end. Correspondingly, the end of the through hole 11 near the light-emitting surface of the display panel 10 is also larger than the end of the through hole 11 near the backlight surface of the display panel 10. This arrangement allows more external light to enter the through hole 11, expanding the viewing angle range of the camera installed in the through hole 11.

[0070] In one embodiment, the functional adhesive 122 includes a single-layer structure that can simultaneously absorb light and prevent water vapor.

[0071] Preferably, the functional adhesive 122 includes a black adhesive.

[0072] In another embodiment, the functional adhesive 122 includes a multilayer structure comprising a vapor-proof layer and a light-absorbing layer stacked together.

[0073] Preferably, the functional adhesive 122 includes at least one of silicone adhesive, epoxy adhesive, or acrylic adhesive.

[0074] Reference Figure 10 In one embodiment, the display module 100 further includes a composite tape layer 17, which is disposed on the backlight side of the display panel 10, and one end of the cutting groove 121 is disposed on the composite tape layer 17.

[0075] Preferably, the orthographic projection of the end of the cutting groove 121 near the composite tape layer 17 on the composite tape layer 17 is located inside the orthographic projection of the end of the cutting groove 121 away from the composite tape layer 17 on the composite tape layer 17.

[0076] In one embodiment, the display module 100 further includes a cover plate 18 disposed on the light-emitting side of the display panel 10.

[0077] Preferably, the cover plate 18 at least covers the display panel 10, the through hole 11 and the barrier structure 12, that is, the orthographic projection of the display panel 10, the through hole 11 and the barrier structure 12 on the cover plate 18 is located within the cover plate 18, and the through hole 11 does not pass through the cover plate 18.

[0078] Preferably, the display module 100 further includes a polarizing layer 14, which is located between the display panel 10 and the cover plate 18, with a through hole 11 penetrating the polarizing layer 14. The polarizing layer 14 is transparent.

[0079] Preferably, the display module 100 further includes a support layer 15, which is located on the side of the display panel 10 away from the cover plate 18, and the through hole 11 penetrates the support layer 15.

[0080] Specifically, the lower end of the barrier structure 12 is located above the composite tape layer 17, and the upper end of the barrier structure 12 is located below the cover plate 18. In this embodiment, the display module 100 includes a composite tape layer 17, a support layer 15, a display panel 10, a polarizing layer 14, an optical adhesive layer 16, and a cover plate 18 stacked sequentially. The through hole 11 and the barrier structure 12 both pass through the optical adhesive layer 16, the polarizing layer 14, the display panel 10, and the support layer 15 sequentially, and the barrier structure 12 abuts between the cover plate 18 and the composite tape layer 17.

[0081] Reference Figure 11 Based on the same inventive concept, another embodiment of this application discloses a method for manufacturing a display module, which includes the following steps:

[0082] Step S1: Provide a display module to be cut, the display module includes a display panel 10;

[0083] Step S2: Cut a cutting groove 121 in the opening area of ​​the display panel 10, and inject functional adhesive 122 into the cutting groove 121 to form a barrier structure 12.

[0084] Step S3: Cut a through hole 11 through the display panel 10 in the barrier structure 12.

[0085] This embodiment provides a method for manufacturing a display module. The display module 100 incorporates a barrier structure 12 located between a through-hole 11 and a display area 101. This barrier structure prevents light propagation and water / oxygen transmission between the through-hole 11 and the display area 101. On one hand, the barrier structure 12 blocks light emitted from the light-emitting device 103 in the display panel 10 from propagating to the sidewall of the through-hole 11, preventing light leakage and improving the image quality of the photosensitive element and the user experience. On the other hand, the barrier structure 12 prevents ambient light from being transmitted from the sidewall of the through-hole 11 to the display area 101 of the display panel 10, thus avoiding any impact on the display effect of the display module 100. Furthermore, the barrier structure 12 also prevents water vapor and oxygen from seeping into the display area 101 of the display panel 10 through the through-hole 11, preventing display defects such as dark spots.

[0086] Specifically, refer to Figure 5 In step S1, the display panel 10 includes a light-emitting device 103. The display panel 10 has a light-emitting surface and a backlight surface that are disposed opposite to each other. The display module also includes a polarizing layer 14, a support layer 15, an optical adhesive layer 16, and a composite tape layer 17. The polarizing layer 14 is disposed on the light-emitting surface of the display panel 10, the support layer 15 is disposed on the backlight surface of the display panel 10, the optical adhesive layer 16 is disposed on the side of the polarizing layer 14 away from the display panel 10, and the composite tape layer 17 is disposed on the side of the support layer 15 away from the display panel 10.

[0087] Specifically, refer to Figure 6 , Figure 7 , Figure 8 In step S2, along the inner edge of the opening area 102, a laser is used to sequentially cut the optical adhesive layer 16, polarizing layer 14, display panel 10, and support layer 15 from top to bottom, forming a cutting groove 121. The angle between the laser direction and the display panel 10 is a preset angle α, which ranges from 10° to 90°. The lower end of the cutting groove 121 is located on the upper surface of the composite tape layer 17. Functional adhesive 122 is injected into the cutting groove 121. After the functional adhesive 122 cures, a barrier structure 12 is formed. At this time, no through holes are formed inside the barrier structure 12.

[0088] Specifically, refer to Figure 9 In step S3, after the barrier structure 12 is fabricated, the interior of the barrier structure 12 in the opening area 102 is laser-cut to form a through hole 11. The through hole 11 sequentially penetrates the optical adhesive layer 16, the polarizing layer 14, the display panel 10, and the support layer 15. The uncut portion inside the barrier structure 12 forms the barrier portion 13. The barrier structure 12 exists between the through hole 11 and the display area 101, thereby providing the ability to block light and water vapor.

[0089] Preferably, the method for manufacturing the display module further includes the following steps:

[0090] Step S4: After completing the preparation of the through hole 11, the cover plate 18 is sealed on the light-emitting side of the display panel 10.

[0091] Specifically, refer to Figure 10 In step S4, the cover plate 18 is fixed to the side of the polarizing layer 14 away from the display panel 10 by the optical adhesive layer 16.

[0092] Furthermore, before the encapsulation cover 18, a camera or other photosensitive element can be installed in the through hole 11. Since the barrier part 13 and the barrier structure 12 are located on the outer periphery of the through hole 11, they will not affect the installation and use of the photosensitive element.

[0093] In one embodiment, step S2 includes: after injecting functional adhesive 122 into the cutting groove 121, curing the functional adhesive 122 to form a barrier structure 12.

[0094] Preferably, injecting functional adhesive 122 into the cutting groove 121 includes injecting functional adhesive 122 into the cutting groove 121 using inkjet printing, screen printing, or a sealing spray valve.

[0095] The functional adhesive 122 can be a multi-layer structure, including a waterproof vapor layer and a light-absorbing layer. Therefore, injecting the functional adhesive 122 into the cutting groove 121 also includes: first injecting a waterproof vapor layer and curing it, then applying a light-absorbing layer and curing it.

[0096] The functional adhesive 122 is cured, and the curing method includes, but is not limited to, natural curing, heat curing, and ultraviolet (UV) curing. Preferably, the functional adhesive 122 injected into the cutting groove 121 is cured by ultraviolet heating and exposure.

[0097] Based on the same inventive concept, another embodiment of this application discloses a display device, which includes the display module in the above embodiment.

[0098] Furthermore, the display device includes mobile phones, VR devices, computers, televisions, in-vehicle display devices, etc.

[0099] This embodiment provides a display device in which the display module 100 is provided with a barrier structure 12 located between the through hole 11 and the display area 101. This barrier structure 12 prevents light propagation and water / oxygen transmission between the through hole 11 and the display area 101. The barrier structure 12 also blocks light emitted from the light-emitting device 103 in the display panel 10 from propagating to the sidewall of the through hole 11, preventing light leakage and improving the image quality of the photosensitive element and the user experience. Simultaneously, the barrier structure 12 prevents ambient light from being transmitted from the sidewall of the through hole 11 to the display area 101 of the display panel 10, thus avoiding affecting the display effect of the display module 100. Furthermore, the barrier structure 12 also prevents water vapor and oxygen from seeping into the display area 101 of the display panel 10 through the through hole 11, preventing display defects such as dark spots.

[0100] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0101] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0102] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A display module, characterized in that, include: A display panel includes a display area and an opening area, wherein the display area at least partially surrounds the opening area; A through-hole is located in the opening area and extends through the display panel; A barrier structure is located in the opening area and surrounding the through hole, the barrier structure being used to block light and moisture; The barrier structure includes a cutting groove and a functional adhesive, the functional adhesive being filled in the cutting groove and curing to form the barrier structure before the through hole is cut. The cutting groove is a conical annular groove, and the end of the cutting groove near the light-emitting side of the display panel is larger than the end of the cutting groove near the backlight side of the display panel; The barrier structure is configured to absorb impact energy acting on the sidewall when the through hole is cut to form it. The display module includes a barrier portion located in the opening area, the barrier portion being disposed between the through hole and the barrier structure, and the barrier portion including an annular structure surrounding the through hole.

2. The display module according to claim 1, characterized in that, The width of the cutting groove ranges from 20μm to 1mm.

3. The display module according to claim 1, characterized in that, The cutting groove is set at a preset angle to the display panel along its length extension direction on the first cross-section, wherein the first cross-section is perpendicular to the plane where the display panel is located, and the preset angle is greater than or equal to 10 degrees and less than 90 degrees.

4. The display module according to claim 1, characterized in that, The functional adhesive comprises a single-layer structure; or... The functional adhesive has a multi-layer structure, including a waterproof vapor layer and a light-absorbing layer stacked together.

5. The display module according to claim 1, characterized in that, The functional adhesive includes at least one of silicone adhesives, epoxy adhesives, and acrylic adhesives.

6. The display module according to claim 1, characterized in that, The functional adhesive includes black adhesive.

7. The display module according to claim 1, characterized in that, The display module includes a composite tape layer, which is disposed on the backlight side of the display panel, and one end of the cutting groove is disposed on the composite tape layer.

8. The display module according to claim 7, characterized in that, The orthographic projection of the end of the cutting groove near the composite tape layer onto the composite tape layer is located inside the orthographic projection of the end of the cutting groove away from the composite tape layer onto the composite tape layer.

9. The display module according to claim 1, characterized in that, The display module includes a cover plate, which is disposed on the light-emitting side of the display panel.

10. The display module according to claim 9, characterized in that, The cover plate at least covers the display panel, the through hole, and the barrier structure.

11. The display module according to claim 9, characterized in that, The display module includes a polarizing layer located between the display panel and the cover plate, and the through hole penetrates the polarizing layer.

12. The display module according to claim 9, characterized in that, The display module includes an optical adhesive layer located between the cover plate and the display panel, and the through hole penetrates the optical adhesive layer.

13. The display module according to claim 9, characterized in that, The display module includes a support layer located on the side of the display panel away from the cover plate, and the through hole penetrates the support layer.

14. A method for manufacturing a display module, characterized in that, Includes the following steps: A display module to be cut is provided, the display module including a display panel; A cutting groove is cut in the opening area of ​​the display panel, and functional adhesive is injected into the cutting groove and cured to form a barrier structure; the cutting groove is a conical annular groove, and the end of the cutting groove near the light-emitting side of the display panel is larger than the end of the cutting groove near the backlight side of the display panel. A through-hole is cut into the barrier structure to penetrate the display panel; during the process of cutting to form the through-hole, the barrier structure absorbs the impact energy acting on the sidewall.

15. The method for preparing a display module according to claim 14, characterized in that, The process of injecting functional adhesive into the cutting groove includes: The functional adhesive is injected into the cutting groove using inkjet printing, screen printing, or a sealing spray valve.

16. The method for preparing a display module according to claim 14, characterized in that, The curing of the functional adhesive includes: The functional adhesive in the cutting groove is cured by ultraviolet heating and exposure.

17. A display device, characterized in that, Includes the display module as described in any one of claims 1-13.

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