Display module, preparation method of display module and display device

Abstract

The invention discloses a display module, a preparation method of the display module and a display device, the display module comprises a first substrate, a polarization layer and a first adhesive layer which are sequentially stacked, the edge of the first adhesive layer is in contact with the first substrate, a closed space is formed by the edge of the first adhesive layer and the first substrate, and the polarization layer is located in the closed space. According to the display module, the edge of the first adhesive layer is in contact with the first substrate to form the closed space, the polarization layer is located in the closed space, overall sealing of the polarization layer can be achieved, invasion of external water and oxygen is effectively blocked, the risk that the edge of the polarization layer fails is reduced, and then the reliability and the display effect of the display module are improved.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) display modules have the advantages of low power consumption, fast response speed, wide operating range, and easy realization of flexible display.

[0003] In the related art, a polarizing layer is usually provided to reduce the reflectivity of the OLED display module to ambient light.

[0004] However, the related technology cannot produce a display module with good performance. Summary of the invention

[0005] In order to solve the above problems or other problems, the present application provides the following technical solutions.

[0006] The first technical solution adopted in the present application is to provide a display module, including a first substrate, a polarizing layer and a first adhesive layer stacked in sequence, the edge of the first adhesive layer contacts the first substrate and forms a closed space with the first substrate, and the polarizing layer is located in the closed space.

[0007] A groove is provided on the first substrate, and the orthographic projection of the polarizing layer on the first substrate falls within the orthographic projection range of the groove on the first substrate; the first adhesive layer covers the surface of the polarizing layer on one side facing away from the first substrate, and the first adhesive layer extends outward along the edge of the polarizing layer until the edge of the first adhesive layer contacts the first substrate located outside the edge of the groove to form a closed space.

[0008] The depth of the groove is equal to or greater than the thickness of the polarizing layer.

[0009] There is a gap between the side wall of the polarizing layer and the side wall of the groove, and the gap is filled with a first adhesive layer.

[0010] The first adhesive layer covers a surface of the polarizing layer away from the first substrate and wraps around a side wall of the polarizing layer; the first adhesive layer wrapping around the side wall of the polarizing layer contacts the first substrate to form a closed space.

[0011] The first adhesive layer covering the side wall of the polarizing layer forms a step with the first adhesive layer covering the side surface of the polarizing layer.

[0012] The display module further comprises a cover plate, which is arranged on a surface of the first adhesive layer facing away from the polarizing layer; a stacked first ink layer and a second ink layer are arranged on the cover plate, the first ink layer is arranged on the cover plate, and the second ink layer is arranged on the first ink layer and is located at the periphery of the first ink layer; the first adhesive layer is in contact with the first ink layer and the second ink layer; wherein an area of ​​the first ink layer not covered by the second ink layer corresponds to the first adhesive layer covering a surface of one side of the polarizing layer, and the second ink layer corresponds to the first adhesive layer covering the side wall of the polarizing layer.

[0013] In order to solve the above technical problems, the second technical solution adopted in the present application is to provide a method for preparing a display module, including: obtaining a first substrate; processing a groove on the first substrate; setting a polarizing layer in the groove; setting a first adhesive layer on the surface of the polarizing layer on the side away from the first substrate, and extending the first adhesive layer outward along the edge of the polarizing layer to contact the first substrate located outside the edge of the groove, so as to form a closed space through the first substrate, the groove and the first adhesive layer.

[0014] In order to solve the above technical problems, the third technical solution adopted in the present application is to provide a method for preparing a display module, including: obtaining a first substrate; setting a polarizing layer on one side surface of the first substrate; setting a first adhesive layer on the side surface of the polarizing layer away from the first substrate, and extending the first adhesive layer outward along the edge of the polarizing layer; obtaining a cover plate, and forming a first ink layer and a second ink layer located on the first ink layer in sequence on the cover plate, and making the pattern shape of the area of ​​the first ink layer not covered by the second ink layer consistent with the pattern shape of the polarizing layer; laminating the cover plate to the side surface of the first adhesive layer away from the polarizing layer, so that the area of ​​the first ink layer not covered by the second ink layer corresponds to the first adhesive layer covering the polarizing layer, and pressing the second ink layer to the first adhesive layer extending out of the edge of the polarizing layer, so that the first adhesive layer extending out of the edge of the polarizing layer covers the side wall of the polarizing layer, and the first adhesive layer covering the side wall of the polarizing layer contacts the first substrate, thereby forming a closed space through the first substrate and the first adhesive layer.

[0015] In order to solve the above technical problems, the fourth technical solution adopted in the present application is to provide a display device, including the above display module.

[0016] The beneficial effect of the present application is as follows: Different from the related art, the present application provides a display module, a method for preparing the display module, and a display device. By making the edge of the first adhesive layer contact with the first substrate to form a closed space, and making the polarizing layer located in the closed space, the overall sealing of the polarizing layer can be achieved to effectively block the invasion of external water and oxygen, thereby reducing the risk of edge failure of the polarizing layer, and then improving the reliability and display effect of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the example description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the first embodiment of the display module of the present application;

[0019] Figure 2 is a structural schematic diagram of a second embodiment of the display module of the present application;

[0020] Figure 3 is a structural schematic diagram of a third embodiment of the display module of the present application;

[0021] Figure 4 It is a schematic diagram of the process of the first embodiment of the method for preparing the display module of the present application;

[0022] Figure 5 It is a schematic diagram of the process of the second embodiment of the method for preparing the display module of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "said", and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless otherwise clearly indicated above, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0025] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] It should be understood that the terms "include", "comprises" or any other variations used herein are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0027] In the related art, a polarizer (POL) is usually provided to reduce the reflectivity of the display module to ambient light. However, the PVA (Polyvinyl alcohol) layer in the polarizer is easily affected by water vapor in the environment. Once subjected to high temperature and high humidity experiments, the POL edge will fail due to the invasion of water vapor, and then the module will suffer from failure phenomena such as discoloration and fading.

[0028] Based on the above situation, the present application provides a display module, a method for preparing a display module, and a display device, which can solve the problem that a display module with good performance cannot be prepared in the above-mentioned related technologies.

[0029] The display module provided by the present application includes a first substrate, a polarizing layer, and a first adhesive layer which are stacked in sequence. The edge of the first adhesive layer contacts the first substrate and forms a closed space with the first substrate. The polarizing layer is located in the closed space. By making the edge of the first adhesive layer contact the first substrate to form a closed space, and making the polarizing layer located in the closed space, the overall sealing of the polarizing layer can be achieved to effectively block the invasion of water and oxygen from the outside, thereby reducing the risk of edge failure of the polarizing layer, and then improving the reliability and display effect of the display module.

[0030] To illustrate the specific structure of the display module of this application, please refer to Figure 1 , Figure 1 It is a schematic structural diagram of the first embodiment of the display module of the present application.

[0031] In this embodiment, the display module 100 includes a first substrate 10, a polarizing layer 20 and a first adhesive layer 30 which are stacked in sequence. The edge of the first adhesive layer 30 contacts the first substrate 10 and forms a closed space with the first substrate 10. The polarizing layer 20 is located in the closed space.

[0032] In some embodiments, the first substrate 10 is a glass substrate.

[0033] In some embodiments, the polarizing layer 20 is a polarizing layer. In other specific embodiments, the polarizing layer 20 is a film layer with a polarizing effect. This application does not limit this.

[0034] In some specific embodiments, the polarizing layer 20 includes a PVA layer. After being dyed, the PVA layer adsorbs iodine molecules having a biaxial absorption function, and the iodine molecules are arranged in an orderly manner on the PVA layer by stretching, thereby forming a polarizing film having uniform biaxial absorption performance.

[0035] In some implementations, the first adhesive layer 30 is an optically clear adhesive (OCA). In some specific implementations, the first adhesive layer 30 is an acrylic or silicone optical adhesive.

[0036] In some embodiments, the first adhesive layer 30 covers a surface of the polarizing layer 20 that is away from the first substrate 10 , so as to prevent external water and oxygen from invading the polarizing layer 20 .

[0037] In this embodiment, the first substrate 10 is provided with a groove 11, and the orthographic projection of the polarizing layer 20 on the first substrate 10 falls within the orthographic projection range of the groove 11 on the first substrate 10. The first adhesive layer 30 covers the surface of the polarizing layer 20 on one side away from the first substrate 10, and the first adhesive layer 30 extends outward along the edge of the polarizing layer 20 until the edge of the first adhesive layer 30 contacts the first substrate 10 located outside the edge of the groove 11, so as to form a closed space.

[0038] In some implementations, the polarizing layer 20 is attached to the groove 11 through a second adhesive layer. In some specific implementations, the second adhesive layer and the first adhesive layer 30 are made of the same material.

[0039] In some embodiments, Figure 1 As shown, the orthographic projection area of ​​the groove 11 on the first substrate 10 is larger than the orthographic projection area of ​​the polarizing layer 20 on the first substrate 10 , so as to facilitate mounting the polarizing layer in the groove 11 .

[0040] In some other embodiments, the orthographic projection area of ​​the groove 11 on the first substrate 10 is equal to the orthographic projection area of ​​the polarizing layer 20 on the first substrate 10, that is, the orthographic projection of the polarizing layer 20 on the first substrate 10 completely overlaps with the orthographic projection of the groove 11 on the first substrate 10, so that the side wall of the polarizing layer 20 fits with the side wall of the groove 11, thereby further improving the sealing performance of the polarizing layer 20. This application is not limited to this.

[0041] In some embodiments, the depth of the groove 11 is equal to or greater than the thickness of the polarizing layer 20 .

[0042] In some specific embodiments, Figure 1As shown, the depth of the groove 11 is equal to the thickness of the polarizing layer 20, so that the first adhesive layer 30 can directly extend to the first substrate 10 outside the edge of the groove 11 while encapsulating the surface of the polarizing layer 20 facing away from the first substrate 10. In other specific implementations, the depth of the groove 11 is greater than the thickness of the polarizing layer 20 to ensure that the polarizing layer 20 can be completely accommodated in the groove 11, which is not limited in the present application.

[0043] In some embodiments, Figure 1 As shown, there is a gap between the side wall of the polarizing layer 20 and the side wall of the groove 11, and the first adhesive layer 30 is not disposed in the gap.

[0044] For other implementations, see Figure 2 , Figure 2 It is a schematic diagram of the structure of the second embodiment of the display module of the present application. In this embodiment, the display module 200 includes a first substrate 10, a polarizing layer 20, and a first adhesive layer 30 which are stacked in sequence. The edge of the first adhesive layer 30 contacts the first substrate 10 and forms a closed space with the first substrate 10. The polarizing layer 20 is located in the closed space. There is a gap between the side wall of the polarizing layer 20 and the side wall of the groove 11, and the gap is filled with the first adhesive layer 30.

[0045] It can be understood that by filling the first adhesive layer 30 in the gap, the first adhesive layer 30 can cover the side wall of the polarizing layer 20 , thereby further improving the sealing performance of the polarizing layer 20 .

[0046] In this embodiment, the display module 100 further includes a cover plate 40 and a second substrate 50 .

[0047] In some embodiments, the cover plate 40 is disposed on a surface of the first adhesive layer 30 that is away from the polarizing layer 20. In some specific embodiments, the cover plate 40 may be a glass cover plate.

[0048] In some implementations, the second substrate 50 is disposed on a surface of the first substrate 10 that is away from the polarizing layer 20. In some specific implementations, the second substrate 50 is a LTPS (Temperature Poly-silicon) substrate.

[0049] It can be understood that by providing a groove 11 on the surface of the first substrate 10, providing the polarizing layer 20 in the groove 11, and making the first adhesive layer 30 cover the surface of the polarizing layer 20 on the side facing away from the first substrate 10, and making the first adhesive layer 30 extend outward along the edge of the polarizing layer 20 to contact the first substrate 10 located outside the edge of the groove 11, a closed space can be formed by the first adhesive layer 30, the groove 11 and the first substrate 10, and the polarizing layer 20 is located in the closed space, so as to achieve overall sealing of the polarizing layer 20, so as to effectively block the invasion of external water and oxygen, thereby reducing the risk of edge failure of the polarizing layer 20, and reducing the risk of failure of the display module 100 such as discoloration and fading, thereby improving the reliability and display effect of the display module 100.

[0050] See also Figure 3 , Figure 3 It is a structural schematic diagram of the third embodiment of the display module of the present application.

[0051] In this embodiment, the display module 300 includes a first substrate 10, a polarizing layer 20 and a first adhesive layer 30 stacked in sequence. The edge of the first adhesive layer 30 contacts the first substrate 10 and forms a closed space with the first substrate 10. The polarizing layer 20 is located in the closed space.

[0052] In this embodiment, the display module 100 further includes a cover plate 40 and a second substrate 50 .

[0053] In some embodiments, the cover plate 40 is disposed on a surface of the first adhesive layer 30 that is away from the polarizing layer 20. In some specific embodiments, the cover plate 40 may be a glass cover plate.

[0054] In some implementations, the second substrate 50 is disposed on a surface of the first substrate 10 that is away from the polarizing layer 20. In some specific implementations, the second substrate 50 is a LTPS substrate.

[0055] Only the parts of this embodiment that are different from the first embodiment and the second embodiment will be described below.

[0056] In this embodiment, the first adhesive layer 30 covers the surface of the polarizing layer 20 facing away from the first substrate 10 and covers the side wall of the polarizing layer 20. The first adhesive layer 30 covering the side wall of the polarizing layer 20 contacts the first substrate 10 to form a closed space.

[0057] In some embodiments, the first adhesive layer 30 covering the side wall of the polarizing layer 20 forms a step with the first adhesive layer 30 covering the one side surface of the polarizing layer 20 .

[0058] It can be understood that by covering the surface and sidewall of the polarizing layer 20 with the first adhesive layer 30 , the polarizing layer 20 can be effectively prevented from being corroded by water and oxygen in the environment, thereby improving the reliability of the polarizing layer 20 .

[0059] In this embodiment, a stacked first ink layer 41 and a second ink layer 42 are provided on the cover plate 40. The first ink layer 41 is provided on the cover plate 40, and the second ink layer 42 is provided on the first ink layer 41 and is located at the periphery of the first ink layer 41. The first adhesive layer 30 is in contact with the first ink layer 41 and the second ink layer 42. The area of ​​the first ink layer 41 not covered by the second ink layer 42 corresponds to the first adhesive layer 30 covering one side surface of the polarizing layer 20, and the second ink layer 42 corresponds to the first adhesive layer 30 covering the side wall of the polarizing layer 20.

[0060] It can be understood that when the cover plate 40 is pressed against the surface of the first adhesive layer 30 on the side facing away from the polarizing layer 20, the area of ​​the first ink layer 41 on the cover plate 40 that is not covered by the second ink layer 42 can completely correspond to the first adhesive layer 30 covering the surface of one side of the polarizing layer 20, and the second ink layer 42 corresponds to the first adhesive layer 30 extending from the polarizing layer 20, so that the second ink layer 42 can press the first adhesive layer 30 extending from the polarizing layer 20, so that the first adhesive layer 30 extending from the polarizing layer 20 covers the side wall of the polarizing layer 20, and then the first adhesive layer 30 covering the side wall of the polarizing layer 20 forms a step with the first adhesive layer 30 covering the surface of one side of the polarizing layer 20.

[0061] Furthermore, since the second ink layer 42 makes the first adhesive layer 30 covering the side wall of the polarizing layer 20 contact with the first substrate 10 (that is, the edge of the first adhesive layer 30 contacts with the first substrate 10), a closed space can be formed by the first substrate 10 and the first adhesive layer 30, and the polarizing layer 20 is located in the closed space, thereby achieving overall sealing of the polarizing layer 20 to effectively block the invasion of external water and oxygen, thereby reducing the risk of edge failure of the polarizing layer 20, and reducing the risk of failure of the display module 100 such as discoloration, fading, etc., thereby improving the reliability and display effect of the display module 100.

[0062] See also Figure 4 , Figure 4 1 is a schematic diagram of a first embodiment of a method for preparing a display module of the present application. In this embodiment, the preparation method includes:

[0063] S11: Obtain a first substrate.

[0064] In this embodiment, the first substrate is a glass substrate.

[0065] In some embodiments, a second substrate is disposed on one side surface of the first substrate, and the second substrate is a LTPS substrate.

[0066] S12: machining a groove on the first substrate.

[0067] In this embodiment, the groove is processed on the surface of the first substrate on the side facing away from the second substrate by etching or milling.

[0068] In some embodiments, a groove is processed on the first substrate based on the size and thickness of the polarizing layer to be mounted, so that the depth of the groove is equal to or greater than the thickness of the polarizing layer, and the size of the groove is equal to or greater than the size of the polarizing layer.

[0069] S13: Arranging a polarizing layer in the groove.

[0070] In this embodiment, the polarizing layer is attached to the groove through the second adhesive layer.

[0071] In some specific implementations, the second adhesive layer is optical adhesive.

[0072] S14: disposing a first adhesive layer on a surface of the polarizing layer facing away from the first substrate, and extending the first adhesive layer outward along the edge of the polarizing layer to contact the first substrate outside the edge of the groove, so as to form a closed space by the first substrate, the groove and the first adhesive layer.

[0073] In this embodiment, the first adhesive layer covers the surface of the polarizing layer away from the first substrate by vacuum adsorption, and extends outward along the edge of the polarizing layer to contact the first substrate outside the edge of the groove.

[0074] In some embodiments, the first adhesive layer is optical adhesive.

[0075] Furthermore, a cover plate is obtained and covered on a surface of the first adhesive layer that is away from the polarizing layer, so that the cover plate and the polarizing layer are bonded together by the first adhesive layer, thereby obtaining a display module.

[0076] It can be understood that in this embodiment, by setting a groove on the surface of the first substrate, setting the polarizing layer in the groove, and making the first adhesive layer cover the side surface of the polarizing layer away from the first substrate, and making the first adhesive layer extend outward along the edge of the polarizing layer to contact the first substrate located outside the edge of the groove, it is possible to form a closed space through the first adhesive layer, the groove and the first substrate, and the polarizing layer is located in the closed space, thereby achieving overall sealing of the polarizing layer, so as to effectively block the invasion of external water and oxygen, thereby reducing the risk of edge failure of the polarizing layer, and reducing the risk of failure of the display module such as discoloration and fading, thereby improving the reliability and display effect of the display module.

[0077] See also Figure 5 , Figure 51 is a flow chart of a second embodiment of the method for preparing a display module of the present application. In this embodiment, the preparation method includes:

[0078] S21: Obtain a first substrate.

[0079] In this embodiment, the first substrate is a glass substrate.

[0080] In some embodiments, a second substrate is disposed on one side surface of the first substrate, and the second substrate is a LTPS substrate.

[0081] S22: Disposing a polarizing layer on one side surface of the first substrate.

[0082] In this embodiment, a polarizing layer is attached to a surface of the first substrate on a side facing away from the second substrate.

[0083] S23: disposing a first adhesive layer on a surface of the polarizing layer that is away from the first substrate, and extending the first adhesive layer outward along an edge of the polarizing layer.

[0084] In this embodiment, the first adhesive layer is covered on a surface of the polarizing layer that is away from the first substrate by vacuum adsorption, and the first adhesive layer is extended outward along the edge of the polarizing layer.

[0085] S24: obtaining a cover plate, and sequentially forming a first ink layer and a second ink layer located on the first ink layer on the cover plate, and making the pattern shape of the area of ​​the first ink layer not covered by the second ink layer consistent with the pattern shape of the polarizing layer.

[0086] It can be understood that the first ink layer and the second ink layer form a step shape.

[0087] S25: Laminating the cover plate to the surface of the first adhesive layer facing away from the polarizing layer, so that the area of ​​the first ink layer not covered by the second ink layer corresponds to the first adhesive layer covering the polarizing layer, and the second ink layer is pressed against the first adhesive layer extending out of the edge of the polarizing layer, so that the first adhesive layer extending out of the edge of the polarizing layer covers the side wall of the polarizing layer, and the first adhesive layer covering the side wall of the polarizing layer contacts the first substrate, thereby forming a closed space through the first substrate and the first adhesive layer.

[0088] It can be understood that, since the pattern shape of the area of ​​the first ink layer not covered by the second ink layer is consistent with the pattern shape of the polarizing layer, when the cover is pressed, the area of ​​the first ink layer not covered by the second ink layer can completely correspond to the first adhesive layer covering the surface of one side of the polarizing layer, and the second ink layer corresponds to the first adhesive layer extending along the polarizing layer, and the first adhesive layer extending out of the polarizing layer can be pressed, so that the first adhesive layer 30 extending out of the polarizing layer covers the side wall of the polarizing layer, and then the first adhesive layer covering the side wall of the polarizing layer forms a step with the first adhesive layer covering the surface of one side of the polarizing layer.

[0089] It can be understood that in this embodiment, the first adhesive layer extending from the polarizing layer covers the side wall of the polarizing layer through the second ink layer on the cover plate, and the first adhesive layer covering the side wall of the polarizing layer contacts the first substrate. A closed space can be formed through the first substrate and the first adhesive layer, and the polarizing layer is located in the closed space, thereby achieving overall sealing of the polarizing layer to effectively block the invasion of external water and oxygen, thereby reducing the risk of edge failure of the polarizing layer, and reducing the risk of failure of the display module such as discoloration and fading, thereby improving the reliability and display effect of the display module.

[0090] Correspondingly, the present application provides a display device, comprising any one of the above-mentioned display modules.

[0091] Different from the related art, the present application makes the edge of the first adhesive layer contact with the first substrate to form a closed space, and the polarizing layer is located in the closed space, so as to achieve overall sealing of the polarizing layer, so as to effectively block the invasion of external water and oxygen, thereby reducing the risk of edge failure of the polarizing layer, and then improving the reliability and display effect of the display module.

[0092] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display module, comprising a first substrate, a polarizing layer and a first adhesive layer stacked in sequence, characterized in that: The edge of the first adhesive layer contacts the first substrate and forms a closed space with the first substrate. The polarizing layer is located in the closed space.

2. The display module according to claim 1, characterized in that: A groove is provided on the first substrate, and the orthographic projection of the polarizing layer on the first substrate falls within the orthographic projection range of the groove on the first substrate; The first adhesive layer covers a surface of the polarizing layer facing away from the first substrate, and the first adhesive layer extends outward along the edge of the polarizing layer until the edge of the first adhesive layer contacts the first substrate outside the edge of the groove to form the enclosed space.

3. The display module according to claim 2, characterized in that: The depth of the groove is equal to or greater than the thickness of the polarizing layer.

4. The display module according to claim 2, characterized in that: There is a gap between the side wall of the polarizing layer and the side wall of the groove, and the gap is filled with the first adhesive layer.

5. The display module according to claim 1, characterized in that: The first adhesive layer covers a surface of the polarizing layer that is away from the first substrate and covers a side wall of the polarizing layer; The first adhesive layer covering the side wall of the polarizing layer is in contact with the first substrate to form the enclosed space.

6. The display module according to claim 5, characterized in that: The first adhesive layer covering the side wall of the polarizing layer forms a step with the first adhesive layer covering a side surface of the polarizing layer.

7. The display module according to claim 6, characterized in that: The display module further includes a cover plate, which is disposed on a surface of the first adhesive layer on a side away from the polarizing layer; The cover plate is provided with a first ink layer and a second ink layer stacked, the first ink layer is provided on the cover plate, and the second ink layer is provided on the first ink layer and is located at the periphery of the first ink layer; The first adhesive layer is in contact with the first ink layer and the second ink layer; wherein the area of ​​the first ink layer not covered by the second ink layer corresponds to the first adhesive layer covering one side surface of the polarizing layer, and the second ink layer corresponds to the first adhesive layer covering the side wall of the polarizing layer.

8. A method for preparing a display module, characterized in that: include: obtaining a first substrate; Processing a groove on the first substrate; Disposing a polarizing layer in the groove; A first adhesive layer is disposed on a surface of the polarizing layer facing away from the first substrate, and the first adhesive layer is extended outward along the edge of the polarizing layer to contact the first substrate located outside the edge of the groove, so as to form a closed space through the first substrate, the groove and the first adhesive layer.

9. A method for preparing a display module, characterized in that: include: obtaining a first substrate; A polarizing layer is disposed on one side surface of the first substrate; Disposing a first adhesive layer on a surface of the polarizing layer that is away from the first substrate, and extending the first adhesive layer outward along an edge of the polarizing layer; Obtaining a cover plate, and sequentially forming a first ink layer and a second ink layer located on the first ink layer on the cover plate, and making the pattern shape of the area of ​​the first ink layer not covered by the second ink layer consistent with the pattern shape of the polarizing layer; The cover plate is laminated to a surface of the first adhesive layer on a side facing away from the polarizing layer, so that an area of ​​the first ink layer not covered by the second ink layer corresponds to the first adhesive layer covering the polarizing layer, and the second ink layer is pressed against the first adhesive layer extending out of an edge of the polarizing layer, so that the first adhesive layer extending out of the edge of the polarizing layer covers a side wall of the polarizing layer, and the first adhesive layer covering the side wall of the polarizing layer contacts the first substrate, thereby forming a closed space through the first substrate and the first adhesive layer.

10. A display device, characterized in that: A display module comprising any one of claims 1 to 7.

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