Display module and mobile terminal

Abstract

The utility model provides a display module and a mobile terminal, and the display module comprises a backboard, a display panel, a printed circuit board, a flexible circuit board, and an edge covering adhesive tape. The flexible circuit board comprises a first part connected with the first surface of the display panel, a second part connected with the second surface of the printed circuit board and a third part located between the first part and the second part, and the edge covering adhesive tape extends from the edge of the first surface of the display panel to the side, away from the display panel, of the backboard. The edge covering adhesive tape covers the printed circuit board and the flexible circuit board; in the direction perpendicular to the display panel, the distance between the side, close to the second surface, of the edge covering adhesive tape and the first part is a preset distance which is larger than or equal to 0, and the distance between the side, close to the second surface, of the edge covering adhesive tape and the second part is smaller than or equal to the preset distance. The distance between the side, close to the second surface, of the edge covering adhesive tape and the third part is smaller than or equal to the preset distance, and therefore the abnormal noise problem caused by the flexible circuit board is solved.

Description

Technical Field

[0001] The utility model belongs to the field of display technology, and specifically relates to a display module and a mobile terminal. Background Art

[0002] In existing display devices, after the display panel and the backlight module are attached to each other, the edge of the product is usually wrapped with an edge tape to prevent light leakage from the side of the product and to strengthen the connection between the display panel and the backlight module.

[0003] At present, a multilayer composite film including polyethylene terephthalate (PET) material is usually used as the edge tape. Among them, the polyethylene terephthalate material has high hardness and strong stiffness. When the outside of the flexible circuit board is covered with the edge tape, there is a gap between the edge tape and the flexible circuit board. When the part where the flexible circuit board is located is pressed, the flexible circuit board is prone to deformation, resulting in abnormal sound, which affects the user experience. Utility Model Content

[0004] The embodiments of the present invention provide a display module and a mobile terminal to alleviate the deficiencies in the related art.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the present invention are as follows:

[0006] The utility model provides a display module, comprising

[0007] Back panel;

[0008] A display panel, disposed on one side of the back plate, the display panel comprising a first surface away from the back plate;

[0009] a printed circuit board, arranged with a spacing from the display panel along a first direction, the printed circuit board comprising a second surface and a third surface arranged opposite to each other, the second surface and the third surface being arranged parallel to the first surface, and the second surface being arranged close to the first surface;

[0010] A flexible circuit board, comprising a first portion connected to the first surface of the display panel, a second portion connected to the second surface of the printed circuit board, and a third portion located between the first portion and the second portion;

[0011] An edge tape extending from an edge of the first surface of the display panel to a side of the back plate away from the display panel, the edge tape covering the printed circuit board and the flexible circuit board;

[0012] Among them, in the direction perpendicular to the display panel, the distance between the side of the edging tape close to the second surface and the first part is a preset distance, and the preset distance is greater than or equal to 0, the distance between the side of the edging tape close to the second surface and the second part is less than or equal to the preset distance, and the distance between the side of the edging tape close to the second surface and the third part is less than or equal to the preset distance.

[0013] Optionally, in one embodiment, the edge tape includes a first release film, a heat shrinkable layer, a shielding layer and a second release film that are stacked;

[0014] Wherein, in the edge tape, the width of the heat shrinkable layer is smaller than the width of other film layers.

[0015] Optionally, in one embodiment, the material of the heat shrinkable layer is one of polyethylene, plastic optical fiber or polyvinyl chloride.

[0016] Optionally, in one embodiment, in a direction perpendicular to the display panel, the orthographic projection of the heat shrinkable layer at least covers the orthographic projection of the flexible circuit board.

[0017] Optionally, in one embodiment, the distance between the side of the edging tape close to the second surface and the second portion is equal to the preset distance, and the distance between the side of the edging tape close to the second surface and the third portion is equal to the preset distance.

[0018] Optionally, in one embodiment, the edge tape is in direct contact with the flexible circuit board in a direction perpendicular to the display panel.

[0019] Optionally, in one embodiment, the edge tape includes a first adhesive portion, a second adhesive portion, and a third adhesive portion connecting the first adhesive portion and the second adhesive portion;

[0020] The first adhesive part is bonded to the side of the first part close to the edge tape, the second adhesive part is bonded to the side of the first part close to the edge tape, and the third adhesive part is bonded to the side of the third part close to the edge tape.

[0021] Optionally, in one embodiment, the edge tape further includes a fourth adhesive portion, the fourth adhesive portion extending from one end of the second adhesive portion to a side of the back plate away from the display panel, and the distance between the side of the fourth adhesive portion close to the second surface and the printed circuit board is less than or equal to the preset distance.

[0022] Optionally, in one embodiment, the edge tape includes a first release film, a composite layer and a second release film that are stacked;

[0023] Wherein, the material of the composite layer includes a material with heat shrinkability and a conductive material.

[0024] An embodiment of the utility model further provides a mobile terminal, comprising a terminal body and any one of the above-mentioned display panels; wherein the terminal body and the display panel are combined into one body.

[0025] Beneficial effects of the embodiments of the utility model: The embodiments of the utility model provide a display module and a mobile terminal, the display module comprising a back plate, a display panel, a printed circuit board, a flexible circuit board and an edge tape, the flexible circuit board comprising a first part connected to the first surface of the display panel, a second part connected to the second surface of the printed circuit board, and a third part located between the first part and the second part, the edge tape extends from the edge of the first surface of the display panel to the side of the back plate away from the display panel, and the edge tape covers the printed circuit board and the flexible circuit board; in a direction perpendicular to the display panel, the distance between the side of the edge tape close to the second surface of the printed circuit board and the first part is a preset distance, the preset distance is greater than or equal to 0, the distance between the side of the edge tape close to the second surface of the printed circuit board and the second part is less than or equal to the preset distance, and the distance between the side of the edge tape close to the second surface of the printed circuit board and the third part is less than or equal to the preset distance, thereby reducing the gap between the flexible circuit board and the edge tape, and further when the part where the flexible circuit board is located is pressed, the abnormal sound problem in the prior art can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of a partial cross-sectional structure of an existing display module;

[0028] Figure 2 It is a structural schematic diagram of the edge tape in the existing display module;

[0029] Figure 3 A schematic diagram of the structure of a display module provided by an embodiment of the utility model;

[0030] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0031] Figure 5 A schematic diagram of the first structure of the edge tape provided by the embodiment of the utility model;

[0032] Figure 6 A second structural schematic diagram of the edge tape provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only, and the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the present invention, the term "same-layer arrangement" refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.

[0037] The disclosure below provides many different embodiments for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention provides various specific examples of processes and materials, but those skilled in the art can recognize the application of other processes and / or the use of other materials.

[0038] The embodiments of the present utility model provide a display module and a mobile terminal. The following are detailed descriptions of each embodiment. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0039] See also Figure 1 and Figure 2 ;in, Figure 1 It is a schematic diagram of a partial cross-sectional structure of a conventional display module 1; Figure 2 The figure is a schematic diagram of the structure of the edge tape in the existing display module.

[0040] like Figure 1 As shown, the existing display module 1 includes a backlight module 11, a display panel 12, a printed circuit board 13, a flexible circuit board 14 and an edge tape 15; the display panel 12 is arranged on the light-emitting side of the backlight module 11, the printed circuit board 13 is electrically connected to the display panel 12 through the flexible circuit board 14, and the edge tape 15 covers the printed circuit board 13 and the flexible circuit board 14; Figure 2 As shown, a multilayer composite film including a polyethylene terephthalate (PET) film layer 151 is usually used as the edge tape 15. The polyethylene terephthalate material has high hardness and strong stiffness. When the outer side of the flexible circuit board 14 is covered with the edge tape 15 with a shielding function, there is a gap between the edge tape 15 and the flexible circuit board 14. When the flexible circuit board 14 is pressed, the position of the edge tape 15 corresponding to the flexible circuit board 14 is prone to deformation, thereby generating abnormal sounds, which affects the user experience.

[0041] Please combine Figure 3 and Figure 4 ;in, Figure 3 A schematic diagram of the structure of a display module provided by an embodiment of the utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0042] The present embodiment provides a display module 2, including a back plate 21, a display panel 30, a printed circuit board 40, a flexible circuit board 50 and an edge tape 60, wherein the display panel 30 is disposed on one side of the back plate 21, the display panel 30 includes a first surface 311 away from the back plate 21, the printed circuit board 40 and the display panel 30 are spaced apart along a first direction X, the printed circuit board 40 includes a second surface 41 and a third surface 42 disposed opposite to each other, the second surface 41 and the third surface 42 are disposed parallel to the first surface 311, and the The second surface 41 is arranged close to the first surface 311, and the flexible circuit board 50 includes a first part 51 connected to the first surface 311 of the display panel 30, a second part 52 connected to the second surface 41 of the printed circuit board 40, and a third part 53 located between the first part 51 and the second part 52; the edge tape 60 extends from the edge of the first surface 311 of the display panel 30 to the side of the back plate 21 away from the display panel 30, and the edge tape 60 covers the printed circuit board 40 and the flexible circuit board 50.

[0043] Among them, in the direction perpendicular to the display panel 30, the distance between the side of the edge tape 60 close to the second surface 41 and the first part 51 is a preset distance, and the preset distance is greater than or equal to 0, the distance between the side of the edge tape 60 close to the second surface 41 and the second part 52 is less than or equal to the preset distance, and the distance between the side of the edge tape 60 close to the second surface 41 and the third part 53 is less than or equal to the preset distance.

[0044] It can be understood that, in this embodiment, by being arranged in a direction perpendicular to the display panel 30, the distance between the side of the edge tape 60 close to the second surface 41 and the first part 51 is a preset distance, and the preset distance is greater than or equal to 0, the distance between the side of the edge tape 60 close to the second surface 41 and the second part 52 is less than or equal to the preset distance, and the distance between the side of the edge tape 60 close to the second surface 41 and the third part 53 is less than or equal to the preset distance, thereby reducing the gap between the flexible circuit board 50 and the edge tape 60, and further when the part where the flexible circuit board 50 is located is pressed, the abnormal sound problem caused by the prior art can be avoided.

[0045] In one embodiment, the display module 2 includes a backlight module 20, a display panel 30, a flexible circuit board 50, a printed circuit board 40 and an edge tape 60; the display panel 30 includes but is not limited to one of an organic light emitting diode display panel (Organic Light Emitting Diode, OLED) and a liquid crystal display panel (Liquid Crystal Display, LCD), and this embodiment does not make specific restrictions on this; wherein, this embodiment takes the display panel 30 as a liquid crystal display panel and the first direction as the X direction as an example to illustrate the technical solution of the utility model.

[0046] The backlight module 20 includes a backplane 21, the display panel 30 is located on one side of the backplane 21, and the display panel 30 is located on the light emitting side of the backlight module 20; the display panel 30 includes a first substrate 31 and a second substrate 32 that are relatively arranged, the second substrate 32 is located on a side of the first substrate 31 away from the backplane 21, and the first substrate 31 includes a wiring layer 31A that is not covered by the second substrate 32; specifically, the first substrate 31 can be an array substrate, the second substrate 32 can be a color film substrate, the second substrate 32 and the first substrate 31 form a step sub-area 30A, the wiring layer 31A is located in the step sub-area 30A, and the wiring layer 31A is connected to the flexible circuit board 50.

[0047] The printed circuit board 40 and the display panel 30 are spaced apart along the first direction X, one end of the flexible circuit board 50 is connected to the display panel 30 , and the other end of the flexible circuit board 50 is connected to the printed circuit board 40 , so as to realize electrical connection between the display panel 30 and the printed circuit board 40 .

[0048] Specifically, the display panel 30 includes a first surface 311 away from the back panel 21, and the edge of the first surface 311 of the display panel 30 is connected to the flexible circuit board 50. The printed circuit board 40 includes a second surface 41 and a third surface 42 that are arranged opposite to each other, the second surface 41 and the third surface 42 are arranged parallel to the first surface 311, and the second surface 41 is arranged close to the first surface 311, and the second surface 41 of the printed circuit board 40 is connected to the flexible circuit board 50; wherein the second surface 41 of the printed circuit board 40 serves as the front side of the printed circuit board 40 (for example, the side facing upward), the third surface 42 of the printed circuit board 40 serves as the back side of the printed circuit board 40 (for example, the side facing downward), and the second surface 41 is arranged closer to the first surface 311 than the third surface 42.

[0049] The edge tape 60 covers the wiring layer 31A, the flexible circuit board 50 and the printed circuit board 40, and the first end of the edge tape 60 is bonded to the edge of the first surface 311 of the display panel 30, and the second end of the edge tape 60 is bonded to the side of the back panel 21 away from the display panel 30, so that the edge tape 60 wraps the flexible circuit board 50 and the printed circuit board 40 to protect them.

[0050] Specifically, please combine Figure 1 , Figure 3 , Figure 4 and Figure 5 ;in, Figure 5 A first structural schematic diagram of an edge tape provided in an embodiment of the utility model; the edge tape 60 includes a first release film 61, a heat shrinkable layer 62, a shielding layer 63 and a second release film 64 which are stacked; wherein, in a direction perpendicular to the display panel 30, the orthographic projection of the heat shrinkable layer 62 at least covers the orthographic projection of the flexible circuit board 50, the heat shrinkable layer 62 has heat shrinkability, and in the edge tape 60, the width of the heat shrinkable layer 62 is less than the width of other film layers; optionally, the material of the heat shrinkable layer 62 includes but is not limited to one of polyethylene (PE), plastic optical fiber (POF) or polyvinyl chloride (PVC).

[0051] A fixed potential or a ground potential is applied to the shielding layer 63. Specifically, the edge tape 60 also includes a ground terminal (not shown in the figure), and the ground terminal is electrically connected to the shielding layer 63, so that a ground potential is applied to the shielding layer 63, thereby preventing external electromagnetic signals from interfering with signal transmission within the flexible circuit board 50 and the printed circuit board 40.

[0052] It can be understood that the edge tape 60 includes a heat shrinkable layer 62, and the heat shrinkable layer 62 has heat shrinkage, so that the edge tape 60 wrapped around the periphery of the printed circuit board 40 and the flexible circuit board 50 can shrink in the direction close to the flexible circuit board 50 after heating, thereby reducing the gap between the flexible circuit board 50 and the edge tape 60, and then when the part where the flexible circuit board 50 is located is pressed, it can avoid the abnormal sound problem caused by the prior art.

[0053] Please continue reading Figure 3 and Figure 4In one embodiment, the distance between the side of the edge tape 60 close to the second surface 41 and the second portion 52 is equal to the preset distance, and the distance between the side of the edge tape 60 close to the second surface 41 and the third portion 53 is equal to the preset distance, thereby further reducing the gap between the flexible circuit board 50 and the edge tape 60, preventing the unbound portion of the flexible circuit board 50 from arching above the second surface 41 of the printed circuit board 40, thereby improving the abnormal sound problem caused by the flexible circuit board 50.

[0054] Optionally, in one embodiment, the edge tape 60 is in direct contact with the flexible circuit board 50 ; in a direction perpendicular to the display panel 30 , the orthographic projection of the edge tape 60 covers the orthographic projection of the flexible circuit board 50 .

[0055] Specifically, the preset distance is equal to 0, and the edge tape 60 includes a first glue portion 60A, a second glue portion 60B, and a third glue portion 60C connecting the first glue portion 60A and the second glue portion 60B; the first glue portion 60A is bonded to the side of the first portion 51 close to the edge tape 60, the second glue portion 60B is bonded to the side of the first portion 51 close to the edge tape 60, and the third glue portion 60C is bonded to the side of the third portion 53 close to the edge tape 60.

[0056] It can be understood that the edge tape 60 includes a heat shrinkable layer 62, and the heat shrinkable layer 62 has heat shrinkage, so that the edge tape 60 wrapped around the periphery of the printed circuit board 40 and the flexible circuit board 50 can directly shrink and wrap around the outer periphery of the flexible circuit board 50 after heating, thereby reducing the gap between the flexible circuit board 50 and the edge tape 60, and then when the part where the flexible circuit board 50 is located is pressed, it can avoid the abnormal sound problem in the prior art; and the third glue part 60C is arranged to fit the side of the third part 53 close to the edge tape 60, so as to avoid the unbound part of the flexible circuit board 50 from arching above the second surface 41 of the printed circuit board 40, thereby improving the flatness of the flexible circuit board 50 and maintaining the stability of signal transmission in the flexible display panel 30.

[0057] Please continue reading Figure 3 In one embodiment, the edge tape 60 also includes a fourth adhesive portion 60D, which extends from one end of the second adhesive portion 60B to a side of the back plate 21 away from the display panel 30, and the distance between the side of the fourth adhesive portion 60D close to the second surface 41 and the printed circuit board 40 is less than or equal to the preset distance.

[0058] Furthermore, the distance between the side of the fourth adhesive portion 60D close to the second surface 41 and the printed circuit board 40 is equal to the thickness of the flexible circuit board, so that when the edge tape 60 is in direct contact with the flexible circuit board 50, the edge tape 60 is maintained between the printed circuit board 40, thereby maintaining the flatness of the edge tape 60 and improving the attachment accuracy of the edge tape 60.

[0059] Optionally, the fourth adhesive portion 60D is connected to a side of the printed circuit board 40 away from the display panel 30, thereby ensuring that the edge tape 60 after heat shrinkage can cooperate with the structure of the printed circuit board 40, improving the connection stability of the edge tape 60, and preventing the problem of poor adhesive bonding between the edge tape 60 and the printed circuit board 40.

[0060] Please combine Figure 3 and Figure 6 ;in, Figure 6 A second structural schematic diagram of the edge tape provided in an embodiment of the utility model.

[0061] In one embodiment, the edge tape 60 includes a first release film 61 , a composite layer 65 , and a second release film 64 that are stacked; the composite layer 65 has heat shrinkability.

[0062] Furthermore, the material of the composite layer 65 includes a heat-shrinkable material and a conductive material; wherein the heat-shrinkable material includes but is not limited to one of polyethylene (PE), plastic optical fiber (POF) or polyvinyl chloride (PVC); the conductive material includes but is not limited to gold, silver, copper or gold-clad silver.

[0063] Specifically, a fixed potential or a ground potential is applied to the composite layer 65. Specifically, the display module 2 also includes a ground terminal (not shown in the figure), which is electrically connected to the composite layer 65, so that a ground potential is applied to the composite layer 65, so that the edge tape 60 is reused as a shielding layer 63, thereby preventing external electromagnetic signals from interfering with signal transmission within the flexible circuit board 50 and the printed circuit board 40.

[0064] At the same time, the material of the composite layer 65 includes a heat-shrinkable material, so that the edge tape 60 wrapped around the periphery of the printed circuit board 40 and the flexible circuit board 50 can shrink in a direction close to the flexible circuit board 50 after heating. Preferably, the edge tape 60 can directly shrink and wrap around the outer periphery of the flexible circuit board 50 after heating, thereby reducing the gap between the flexible circuit board 50 and the edge tape 60, and then when the part where the flexible circuit board 50 is located is pressed, the abnormal sound problem that occurs in the prior art can be avoided.

[0065] This embodiment provides a mobile terminal, which includes a terminal body and the display module described in any one of the above embodiments, and the terminal body and the display module are combined into one.

[0066] It can be understood that the display module has been described in detail in the above embodiments and will not be repeated here.

[0067] In specific applications, the mobile terminal can be a display screen of a smart phone, tablet computer, laptop computer, smart bracelet, smart watch, smart glasses, smart helmet, desktop computer, smart TV or digital camera, and can even be used on electronic devices with flexible display screens.

[0068] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] The above is a detailed introduction to a display module and a mobile terminal provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A display module, characterized in that: include: Back panel; A display panel, disposed on one side of the back plate, the display panel comprising a first surface away from the back plate; a printed circuit board, arranged with a spacing from the display panel along a first direction, the printed circuit board comprising a second surface and a third surface arranged opposite to each other, the second surface and the third surface being arranged parallel to the first surface, and the second surface being arranged close to the first surface; A flexible circuit board, comprising a first portion connected to the first surface of the display panel, a second portion connected to the second surface of the printed circuit board, and a third portion located between the first portion and the second portion; An edge tape extending from an edge of the first surface of the display panel to a side of the back plate away from the display panel, the edge tape covering the printed circuit board and the flexible circuit board; Among them, in the direction perpendicular to the display panel, the distance between the side of the edging tape close to the second surface and the first part is a preset distance, and the preset distance is greater than or equal to 0, the distance between the side of the edging tape close to the second surface and the second part is less than or equal to the preset distance, and the distance between the side of the edging tape close to the second surface and the third part is less than or equal to the preset distance.

2. The display module according to claim 1, characterized in that: The edge tape comprises a first release film, a heat shrinkable layer, a shielding layer and a second release film which are stacked; Wherein, in the edge tape, the width of the heat shrinkable layer is smaller than the width of other film layers.

3. The display module according to claim 2, characterized in that: The material of the heat shrinkable layer is one of polyethylene, plastic optical fiber or polyvinyl chloride.

4. The display module according to claim 2, characterized in that: In a direction perpendicular to the display panel, the orthographic projection of the heat shrinkable layer at least covers the orthographic projection of the flexible circuit board.

5. The display module according to claim 1, characterized in that: The distance between the side of the edge tape close to the second surface and the second portion is equal to the preset distance, and the distance between the side of the edge tape close to the second surface and the third portion is equal to the preset distance.

6. The display module according to claim 5, characterized in that: The edge tape is in direct contact with the flexible circuit board.

7. The display module according to claim 6, characterized in that: The edge tape comprises a first adhesive portion, a second adhesive portion, and a third adhesive portion connecting the first adhesive portion and the second adhesive portion; The first adhesive part is bonded to the side of the first part close to the edge tape, the second adhesive part is bonded to the side of the first part close to the edge tape, and the third adhesive part is bonded to the side of the third part close to the edge tape.

8. The display module according to claim 7, characterized in that: The edge tape also includes a fourth adhesive portion, which extends from one end of the second adhesive portion to a side of the back plate away from the display panel, and the distance between the side of the fourth adhesive portion close to the second surface and the printed circuit board is less than or equal to the preset distance.

9. The display module according to claim 1, characterized in that: The edge tape comprises a first release film, a composite layer and a second release film which are stacked; Wherein, the material of the composite layer includes a heat-shrinkable material and a conductive material.

10. A mobile terminal, characterized in that: The mobile terminal comprises a terminal body and a display module according to any one of claims 1 to 9, wherein the terminal body and the display module are integrated into one.

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