Display module, preparation method thereof and display device

Abstract

The invention provides a display module, a preparation method thereof and a display device, the display panel comprises a cover plate, an ink layer, a first bonding layer, a second bonding layer and a display panel, the cover plate comprises a straight area and a bending area surrounding at least part of the straight area; the ink layer is located on one side of the cover plate, at least part of the ink layer is arranged in the bending area of the cover plate, and the ink layer surrounds the cover plate in the circumferential direction and defines a cavity. The cavity is filled with the first bonding layer; the second bonding layer is located on the side, away from the cover plate, of the first bonding layer and covers at least part of the ink layer, and the storage modulus of the second bonding layer is larger than or equal to 500 kPa; the display panel is located on the side, away from the cover plate, of the second bonding layer. The storage modulus of the second bonding layer is high, deformation of the second bonding layer in the attaching process of the display panel and the cover plate can be reduced, and the mold mark resistance of the display module is improved.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) display panel 40 has been widely used due to its advantages such as high brightness, low power consumption, fast response and low driving voltage.

[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 the present disclosure is to provide a display module and a preparation method thereof, and a display device, wherein the display module has a strong anti-mold printing capability.

[0005] Based on the above objectives, the present disclosure discloses a display module, which includes:

[0006] A cover plate, the cover plate comprising a straight region and a curved region surrounding at least a portion of the straight region;

[0007] An ink layer, located on one side of the cover plate and at least partially disposed in the curved area of ​​the cover plate, the ink layer being disposed circumferentially around the cover plate and enclosing a cavity;

[0008] a first adhesive layer, wherein the first adhesive layer fills the cavity;

[0009] a second adhesive layer, the second adhesive layer being located on a side of the first adhesive layer away from the cover plate and covering at least a portion of the ink layer, wherein the storage modulus of the second adhesive layer is greater than or equal to 500 kPa;

[0010] The display panel is located on a side of the second adhesive layer away from the cover plate.

[0011] In one embodiment, the material of the first adhesive layer includes liquid optical adhesive;

[0012] Preferably, the first adhesive layer is formed by curing the liquid optical adhesive.

[0013] In one embodiment, the storage modulus of the first adhesive layer is less than the storage modulus of the second adhesive layer;

[0014] Preferably, the storage modulus of the first adhesive layer is less than 100 kPa;

[0015] Preferably, the material of the first adhesive layer includes solid optical glue, and the material of the second adhesive layer includes solid optical glue.

[0016] In one embodiment, the side wall of the first adhesive layer is in contact with the side wall of the ink layer close to the flat area.

[0017] In one embodiment, in a direction perpendicular to the cover plate, a ratio of a thickness of the first adhesive layer to a thickness of the ink layer is between 0.98 and 1.02.

[0018] In one embodiment, in a direction perpendicular to the cover plate, the thickness of the second adhesive layer is less than or equal to 100 microns;

[0019] Preferably, the recovery of the second adhesive layer is greater than or equal to 98%.

[0020] In one embodiment, the display module further includes a polarizer, wherein the polarizer is located between the second adhesive layer and the display panel, and the polarizer extends from the straight area to the curved area.

[0021] Based on the same inventive concept, the present disclosure also provides a method for manufacturing a display module, comprising the following steps:

[0022] Providing a cover plate, the cover plate comprising a straight area and a curved area connected to the straight area;

[0023] An ink layer is formed on the cover plate, at least a portion of the ink layer is located in the bending area, and the ink layer is circumferentially arranged around the cover plate to enclose a cavity;

[0024] forming a first adhesive layer and a second adhesive layer on the cover plate, wherein the first adhesive layer fills the cavity, and the second adhesive layer is located on a side of the first adhesive layer away from the cover plate and covers at least a portion of the ink layer;

[0025] A display panel is provided, wherein the display panel is attached to a side of the second adhesive layer away from the cover plate.

[0026] In one embodiment, the step of forming the first adhesive layer and the second adhesive layer on the cover plate includes:

[0027] The step of forming the first adhesive layer and the second adhesive layer on the cover plate comprises:

[0028] Applying a liquid first adhesive in the cavity and pre-curing the liquid first adhesive,

[0029] Providing a second adhesive layer, laminating the second adhesive layer on the side of the pre-cured liquid first adhesive facing away from the cover plate, and curing the pre-cured liquid first adhesive to form the first adhesive layer, so that the second adhesive layer is laminated to the cover plate, or,

[0030] Providing a second adhesive layer, coating a liquid first adhesive on the second adhesive layer, and pre-curing the liquid first adhesive;

[0031] The second adhesive layer is bonded to the cover plate at one side corresponding to the pre-cured liquid first adhesive, and the pre-cured liquid first adhesive is located in the cavity, and the pre-cured liquid first adhesive is cured to form the first adhesive layer, so that the second adhesive layer is bonded to the cover plate, or,

[0032] providing a first adhesive layer, and disposing the first adhesive layer in the cavity,

[0033] providing a second adhesive layer, and laminating the second adhesive layer to a side of the first adhesive layer facing away from the cover plate, or,

[0034] Providing a second adhesive layer and a first adhesive layer, and laminating the first adhesive layer on the second adhesive layer;

[0035] The first adhesive is attached to the cover plate at a side facing away from the second adhesive layer, and the first adhesive layer is located in the cavity.

[0036] Based on the same inventive concept, the present disclosure provides a display device, which is the display module mentioned above.

[0037] Compared with the prior art, the second adhesive layer in the display module provided by the present disclosure has a higher storage modulus, which can reduce the deformation of the second adhesive layer during the bonding process of the display panel and the cover plate, and improve the anti-mold printing capability of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 It is a schematic diagram of a partial cross section of a display module in the prior art;

[0040] Figure 2 A schematic diagram of the planar structure of a display module provided in an embodiment of the present application;

[0041] Figure 3 A partial cross-sectional schematic diagram of a display module provided in an embodiment of the present application;

[0042] Figure 4A schematic flow chart of a method for manufacturing a display module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0044] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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.

[0045] In the process of implementing the present invention, the inventors found that the following problems exist in the related art: due to the design requirements of the narrow edge of the display module, the cover plate 100 is bent in the edge area, such as the common 3D hyperbolic and quadrilateral display modules, such as Figure 1 As shown, the display module includes a cover plate 100, an ink layer 200, an optical adhesive (OCA) 300 and a display panel 400, wherein the cover plate 100 has a straight area AA and a curved area FAA arranged adjacent to each other, the oil film layer 200 is located at one side of the cover plate 100 and at the curved area FAA, the oil film layer encloses and forms a cavity 110, the optical adhesive (OCA) 300 fills the cavity 110 and extends along the side wall of the ink layer 20 toward the straight area AA to the side of the ink layer 200 away from the cover plate 100, and the display panel 400 is provided. The optical adhesive is placed on the side away from the cover plate 100. During the bonding process of the display module, on the one hand, the cover plate 100 is close to the surface of the display panel 400, and a gap will be generated between the side wall of the ink layer 200 close to the straight area AA and the adhesive layer. Bonding bubbles are easily generated in the gap. On the other hand, conventional optical adhesive (OCA) is a material with low modulus and thick thickness before UV (such as 150um). During the bonding process, the optical adhesive (OCA) will be compressed and deformed, especially in the FAA position of the curved area. Due to the thinning of the edge thickness of the optical adhesive (OCA), the screen has different reflections in the arc area, resulting in arc area mold printing problems. At the same time, the optical adhesive (OCA) material is thick and the anti-mold printing performance is poor.

[0046] Based on the above reasons, the present application provides a display module and a preparation method thereof, and a display device, wherein the display module has a strong anti-mold printing capability.

[0047] Next, combine Figure 2-Figure 3 The display module provided by the first aspect of the present application is described, and the display module includes a cover plate 10, an ink layer 20, a first adhesive layer 31, a second adhesive layer 32 and a display panel 40, wherein the cover plate 10 includes a straight area AA and a curved area FAA surrounding at least a portion of the straight area AA, the ink layer 20 is located on one side of the cover plate 10 and is at least partially located in the curved area FAA of the cover plate 10, and the ink layer 20 is circumferentially arranged around the cover plate 10 and encloses a cavity 11; the first adhesive layer 31 The cavity 11 is filled, the second adhesive layer 32 is located on the side of the first adhesive layer 31 away from the cover plate 10, and covers at least a portion of the ink layer 20, the storage modulus of the second adhesive layer 32 is greater than or equal to 500 kPa, and the display panel 40 is located on the side of the second adhesive layer 32 away from the cover plate 10. In the present application, the storage modulus of the second adhesive layer 32 is relatively high, which can reduce the deformation of the second adhesive layer 32 during the bonding process of the display panel 40 and the cover plate 10, thereby improving the anti-mold printing ability of the display module.

[0048] The cover plate 10 in the present application includes a hyperbolic cover plate 10 or a quad-curved cover plate 10. The cover plate 10 may be a curved rigid cover plate 10. The cover plate 10 includes a transparent substrate, and the curved cover plate 10 includes a straight area AA and a curved area FAA surrounding at least part of the straight area AA. The curved area FAA may be arc-shaped. The straight area AA is arranged in the main display area. The curved area FAA is arranged in the curved display area. The curved area FAA may surround at least part of the straight area AA; specifically, the curved area FAA may be arranged around the circumferential edge of the straight area AA. For example, the curved area FAA may be arranged around the circumferential edge of the straight area AA, and cooperate with the straight area AA to form a concave structure. Among them, the transparent substrate is formed of materials such as glass (Glass), polymethyl methacrylate (PolyMethyl Methacrylate, PMMA), and polycarbonate (Poly Carbonate, PC).

[0049] The display panel 40 includes a flexible display panel 40, and the display panel 40 has a display surface and a back surface facing each other. The cover plate 10 is specifically covered on the side where the display surface of the display panel 40 is located. The display panel 40 is used to display images when working. The display panel 40 specifically includes a straight area AA and a curved area FAA surrounding at least part of the straight area AA. The straight area AA can be set in the main display area, and the curved portion can be set in the curved display area. The curved portion can be arc-shaped. Among them, the straight area AA and the curved portion of the display panel 40 can both display images when working to achieve 3D display of the display module.

[0050] The oil film layer 20 is arranged on one side of the cover plate 10 and on the curved area FAA of the cover plate 10, that is, the oil film layer is arranged in a circle around the straight area AA of the cover plate 10 to absorb the light emitted from the display area and reflected to the edge of the cover plate 10 to prevent light leakage from the edge of the cover plate 10. Furthermore, the orthographic projection of the ink layer 20 on the cover plate 10 at least covers a portion of the curved area FAA of the cover plate 10.

[0051] In one embodiment, the first adhesive layer 31 includes liquid optical glue, and the second adhesive layer 32 includes solid optical glue, wherein the first adhesive layer 31 is formed by curing the liquid optical glue, and the liquid optical glue is filled in the cavity 11, and after filling, it is cured to form the first adhesive layer 31. In this embodiment, since the first adhesive layer 31 is liquid in the initial state, the liquid optical glue with higher fluidity is used to absorb the morphological tolerance between the cover plate 10 and the ink layer 20, thereby reducing the possibility of defects such as wrinkles and cracks occurring in the cavity 11 enclosed by the cover plate 10 and the ink layer 20 where the first adhesive layer 31 is bonded. Therefore, the liquid optical glue has a better fit with the edge of the ink layer 20, and wrinkles are not easy to appear during the molding process, which can effectively fill the step difference between the cover plate 10 and the oil film layer.

[0052] In another embodiment, the first adhesive layer 31 includes solid optical glue, and the second adhesive layer 32 includes solid optical glue. The storage modulus of the first adhesive layer 31 is less than the storage modulus of the second adhesive layer 32. Further, the storage modulus of the first adhesive layer 31 is less than or equal to 100 kPa. In this embodiment, in the initial state of the first adhesive layer 31 (that is, when the display panel 40 and the cover plate 10 are not pressed together), the surface of the first adhesive layer 31 on one side close to the ink layer 20 is inclined so that the side wall of the ink layer 20 close to the straight area AA and the surface of the cover plate 10 close to the display panel 40 and the first adhesive layer 31 together enclose a accommodating space. Since the first adhesive layer 31 in this embodiment is an optical glue with an ultra-low storage modulus, during the pressing process of the cover plate 10 and the display panel 40, the first adhesive layer 31 will deform and fill the gap, so that the side wall of the first adhesive layer 31 can be better fitted with the side wall of the oil film layer to avoid the formation of a step difference and solve the problem of 3D bonding bubbles.

[0053] In a specific embodiment, the side wall of the first adhesive layer 31 is bonded to the inner wall of the ink layer 20. Furthermore, in the direction perpendicular to the cover plate 10, the ratio of the thickness of the first adhesive layer 31 to the thickness of the ink layer 20 is between 0.98 and 1.02, that is, the thickness of the first adhesive layer 31 is the same as or approximately the same as the thickness of the ink layer 20, thereby avoiding the step difference between the first adhesive layer 31 and the ink layer 20 and solving the 3D bonding bubble problem.

[0054] In one embodiment, the second adhesive layer 32 has a high recovery (recovery, which can also be called elastic recovery, elastic recovery refers to the ability of a material to return to its original shape after being subjected to force), and the recovery of the second adhesive layer 32 is greater than or equal to 98%, that is, the second adhesive layer 32 has a high cohesive force, which can reduce the deformation of the second adhesive layer 32 during the bonding process and prevent the thickness of the second adhesive layer 32 in the bending area FAA from being thinned. The thickness of the second adhesive layer 32 is less than or equal to 100 microns, and the thickness of the second adhesive layer 32 is relatively Thin, on the one hand, not only reduces the thickness of the entire display module, but also improves the anti-mold printing ability of the display module. However, the thickness of the second adhesive layer 32 cannot be too thin. When the thickness of the second adhesive layer 32 is too thin, it will affect the viscosity of the second adhesive layer 32. Therefore, the thickness of the second adhesive layer 32 is greater than or equal to 50 microns and less than or equal to 100 microns (for example, the thickness of the second adhesive layer 32 is 50 microns, 55 microns, 60 microns, 65 microns, 70 microns, 75 microns, 80 microns, 85 microns, 90 microns, 95 microns, 100 microns).

[0055] In one embodiment, the display module also includes a polarizer, which is located between the second adhesive layer 32 and the display panel 40 and is used to block the reflection of external light and avoid reflected light interference on the surface of the display panel 40 to ensure that the display panel 40 maintains a high contrast. Furthermore, the polarizer extends from the straight area AA to the curved area FAA, and the orthographic projection of the polarizer on the substrate at least covers a portion of the oil film layer.

[0056] A second aspect of the present disclosure provides a method for preparing a display module, the method specifically comprising the following steps:

[0057] Providing a cover plate 10, the cover plate 10 comprising a straight area AA and a curved area FAA connected to the straight area AA;

[0058] An ink layer 20 is formed on one side of the cover plate 10, at least a portion of the ink layer 20 is located in the bending area FAA, and the ink layer 20 is circumferentially arranged around the cover plate 10 to enclose a cavity 11;

[0059] A first adhesive layer 31 and a second adhesive layer 32 are formed on one side of the cover plate 10, wherein the first adhesive layer 31 fills the cavity 11, and the second adhesive layer 32 is located on a side of the first adhesive layer 31 away from the cover plate 10 and covers at least a portion of the ink layer 20;

[0060] A display panel 40 is provided, and the display panel 40 is attached to a side of the second adhesive layer 32 away from the cover plate 10 .

[0061] In a specific embodiment, the step of forming the first adhesive layer 31 and the second adhesive layer 32 on the cover plate 10 includes:

[0062] When the first adhesive layer 31 includes liquid optical adhesive, the liquid optical adhesive can be directly coated in the cavity 11 enclosed by the ink layer 20, the liquid optical adhesive is pre-cured, and then the second adhesive layer 32 is attached to the pre-cured liquid optical adhesive. The specific steps are as follows:

[0063] Applying a liquid first adhesive (optical adhesive) in the cavity 11 and pre-curing the liquid first adhesive (optical adhesive);

[0064] For example, after the liquid first adhesive (optical adhesive) is applied, a curing device such as an ultraviolet lamp (UV lamp) can be used to pre-cure the liquid first adhesive applied on one side of the curved display panel 40, thereby forming a semi-fluid bonding adhesive. This step can also be called pre-hardening of the liquid first adhesive.

[0065] A second adhesive layer 32 is provided and laminated to the side of the pre-cured liquid first adhesive facing away from the cover plate 10 , and the pre-cured liquid first adhesive is cured to form a first adhesive layer 31 , so that the second adhesive layer 31 is laminated to the cover plate 10 .

[0066] When the first adhesive layer 31 includes liquid optical adhesive, the liquid first adhesive (optical adhesive) may be coated on the first adhesive layer 31 and pre-cured, and then the second adhesive layer 32 and the pre-cured liquid optical adhesive may be attached to the cover plate 10. The specific steps are as follows:

[0067] Providing a second adhesive layer 32, coating a liquid first adhesive glue (optical adhesive) on the second adhesive layer 32, and pre-curing the liquid first adhesive glue (optical adhesive);

[0068] For example, after the liquid first adhesive (optical adhesive) is applied, a curing device such as an ultraviolet lamp (UV lamp) can be used to pre-cure the liquid optical adhesive material applied on one side of the curved display panel 40, thereby forming a semi-fluid bonding adhesive. This step can also be called pre-hardening of the liquid first adhesive (optical adhesive).

[0069] The second adhesive layer 32 is bonded to the cover plate 10 on one side corresponding to the pre-cured liquid first adhesive, wherein the pre-cured liquid first adhesive is located in the cavity, and the pre-cured liquid first adhesive is cured to form a first adhesive layer 31, so that the second adhesive layer 32 is bonded to the cover plate 10.

[0070] When the first adhesive layer 31 includes solid optical glue, the solid optical glue with low storage modulus can be directly bonded into the cavity 11, and then the second adhesive layer 32 is bonded on the first adhesive layer 31. The specific steps are as follows:

[0071] Providing a first adhesive layer 31, and placing the first adhesive layer 31 in the cavity 11,

[0072] A second adhesive layer 32 is provided and attached to a side of the first adhesive layer 31 facing away from the cover plate 10 .

[0073] When the first adhesive layer 31 includes a solid optical adhesive, the solid optical adhesive with a low storage modulus may be firstly bonded to the second adhesive layer 32, and then the second adhesive layer 32 and the first adhesive layer 31 (solid optical adhesive with a low storage modulus) are bonded together on the cover plate 10. The specific steps are as follows:

[0074] Providing a first adhesive layer 31 and a second adhesive layer 32, and bonding the first adhesive layer 31 to the second adhesive layer 32;

[0075] The first adhesive layer 31 is attached to the cover plate 10 at a side facing away from the second adhesive layer 32 , and the first adhesive layer 31 is located in the cavity 11 .

[0076] The third aspect of the present disclosure provides a display device, which includes the display module in any of the above embodiments. The display device can be a mobile phone, a computer, a television, a smart wearable display device, etc., and the embodiments of the present invention are not particularly limited to this. The beneficial effects of the display device are the same as those of the display panel 40, which will not be repeated here.

[0077] It should be noted that the above describes some embodiments of the present disclosure. 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 an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0078] The embodiments of the present disclosure 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 the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display module, characterized in that: include: A cover plate, the cover plate comprising a straight region and a curved region surrounding at least a portion of the straight region; An ink layer, located on one side of the cover plate and at least partially disposed in the curved area of ​​the cover plate, the ink layer being disposed circumferentially around the cover plate and enclosing a cavity; a first adhesive layer, wherein the first adhesive layer fills the cavity; a second adhesive layer, the second adhesive layer being located on a side of the first adhesive layer away from the cover plate and covering at least a portion of the ink layer, wherein the storage modulus of the second adhesive layer is greater than or equal to 500 kPa; The display panel is located on a side of the second adhesive layer away from the cover plate.

2. The display module according to claim 1, wherein: The material of the first bonding layer includes liquid optical glue; Preferably, the first adhesive layer is formed by curing the liquid optical adhesive.

3. The display module according to claim 1, wherein: The storage modulus of the first adhesive layer is smaller than the storage modulus of the second adhesive layer; Preferably, the storage modulus of the first adhesive layer is less than or equal to 100 kPa; Preferably, the material of the first adhesive layer includes solid optical glue, and the material of the second adhesive layer includes solid optical glue.

4. The display module according to claim 1, wherein: The side wall of the first adhesive layer is in contact with the inner side wall of the ink layer.

5. The display module according to claim 1, wherein: In a direction perpendicular to the cover plate, a ratio of a thickness of the first adhesive layer to a thickness of the ink layer is between 0.98 and 1.

02.

6. The display module according to claim 1, wherein: In a direction perpendicular to the cover plate, the thickness of the second adhesive layer is less than or equal to 100 microns; Preferably, the recovery of the second adhesive layer is greater than or equal to 98%.

7. The display module according to claim 1, wherein: The display module further includes a polarizer, which is located between the second adhesive layer and the display panel, and extends from the straight area to the curved area.

8. A method for manufacturing a display module, characterized in that: The steps include: Providing a cover plate, the cover plate comprising a straight area and a curved area connected to the straight area; An ink layer is formed on the cover plate, at least a portion of the ink layer is located in the bending area, and the ink layer is circumferentially arranged around the cover plate to enclose a cavity; forming a first adhesive layer and a second adhesive layer on the cover plate, wherein the first adhesive layer fills the cavity, and the second adhesive layer is located on a side of the first adhesive layer away from the cover plate and covers at least a portion of the ink layer; A display panel is provided, wherein the display panel is attached to a side of the second adhesive layer away from the cover plate.

9. The manufacturing method according to claim 8, characterized in that: The step of forming the first adhesive layer and the second adhesive layer on the cover plate comprises: Applying a liquid first adhesive in the cavity and pre-curing the liquid first adhesive, Providing a second adhesive layer, laminating the second adhesive layer on the side of the pre-cured liquid first adhesive facing away from the cover plate, and curing the pre-cured liquid first adhesive to form the first adhesive layer, so that the second adhesive layer is laminated to the cover plate, or, Providing a second adhesive layer, coating a liquid first adhesive on the second adhesive layer, and pre-curing the liquid first adhesive; The second adhesive layer is bonded to the cover plate at one side corresponding to the pre-cured liquid first adhesive, and the pre-cured liquid first adhesive is located in the cavity, and the pre-cured liquid first adhesive is cured to form the first adhesive layer, so that the second adhesive layer is bonded to the cover plate, or, providing a first adhesive layer, and disposing the first adhesive layer in the cavity, providing a second adhesive layer, and laminating the second adhesive layer to a side of the first adhesive layer facing away from the cover plate, or, Providing a second adhesive layer and a first adhesive layer, and laminating the first adhesive layer on the second adhesive layer; The first adhesive is attached to the cover plate at a side facing away from the second adhesive layer, and the first adhesive layer is located in the cavity.

10. A display device, characterized in that: The display device comprises a display module as described in any one of claims 1-7.

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