Display modules and their manufacturing methods, electronic devices

Abstract

This application provides a display module, its manufacturing method, and an electronic device. The display module includes a display panel comprising a first display portion, a second display portion, and a bent portion connecting the two display portions. The first and second display portions are stacked along the thickness direction of the display module. A heat dissipation composite layer is disposed between the first and second display portions, and the surface of the heat dissipation composite layer facing the second display portion has a receiving groove. A shim is disposed on the side of the second display portion facing the first display portion, and at least a portion of the shim is accommodated within the receiving groove. This display module reduces its bending radius, thereby achieving a narrow bezel design without affecting the relevant performance of the display module. Furthermore, the bending radius of the display panel is not limited by the thickness requirements of each structural layer.

Description

Technical Field

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

[0002] With the development of technology, the display area required for electronic devices such as mobile phones and smartwatches is getting larger and larger, and the bezels of display modules are getting smaller and smaller. Display module manufacturers are all working to reduce the bezels of display modules, and narrow bezels have become one of the main competitive advantages of products.

[0003] In narrow bezel requirements, the bottom bezel is the most critical component. Reducing the bending radius of the non-display area of ​​the display module is a key approach. Currently, this is achieved by reducing the thickness of each layer in the display module, such as the base film (BPF), thermal composite layer (SCF), and support blocks. However, each layer of the display module has its specific function; reducing its thickness will compromise related performance characteristics. For example, thinning the SCF reduces the module's mechanical protection properties, such as its resistance to cushioning. Furthermore, the thickness of each layer has its limits; once the bending radius is reduced to a certain extent, it becomes constrained by the thickness of these layers. Summary of the Invention

[0004] The display module, its manufacturing method, and electronic device provided in this application aim to solve the problem that the existing display module's solution of reducing bending to achieve a narrow bezel will result in damage to the relevant performance of the display module, and the degree of reduction in bending radius is limited by the thickness of each layer of the display module's structure.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: providing a display module. The display module includes a display panel, a heat dissipation composite layer, and a raised block; wherein the display panel includes a first display portion, a bent portion, and a second display portion, the first display portion and the second display portion being stacked along the thickness direction of the display module, and the bent portion connecting the first display portion and the second display portion together; the heat dissipation composite layer is disposed between the first display portion and the second display portion, and the surface of the heat dissipation composite layer facing the second display portion has an accommodating groove; the raised block is disposed on the side of the second display portion facing the first display portion, and at least a portion of the raised block is accommodated within the accommodating groove.

[0006] In one embodiment, the surface of the shim block facing the second display portion is flush with the side surface of the heat dissipation composite layer facing away from the first display portion.

[0007] The above solution can reduce the overall thickness of the display module and minimize the bending radius of the display module as much as possible.

[0008] In one embodiment, the heat dissipation composite layer includes a metal layer, a buffer layer, and a first adhesive layer stacked sequentially; wherein the first adhesive layer is bonded to the side surface of the first display portion facing the second display portion; and the receiving groove is formed on the metal layer.

[0009] In one embodiment, the depth of the receiving groove along the thickness direction of the heat dissipation composite layer is less than the thickness of the metal layer.

[0010] The above solution can ensure a certain heat dissipation effect at the position of the raised block corresponding to the heat dissipation composite layer, while reducing the bending radius of the display panel, thereby achieving a narrow bezel design for the display module.

[0011] In one embodiment, the receiving groove extends through the metal layer along the thickness direction of the heat dissipation composite layer.

[0012] The above solution will not affect the buffering performance of the heat dissipation composite layer; at the same time, since visible light cannot pass through the foam, the foam can be used to shield the back of the first display unit from light.

[0013] In one embodiment, the side surface of the shim facing the receiving groove has a second adhesive layer, and the shim is bonded to the receiving groove through the second adhesive layer.

[0014] The above solution can stably fix the shim block in the receiving groove, preventing the shim block from falling out of the receiving groove during the bending of the display module.

[0015] In one embodiment, both the metal layer and the shim block are made of copper foil.

[0016] The above solution can utilize the raised blocks housed in the receiving groove to dissipate heat simultaneously, effectively improving the problem of poor local heat dissipation and shielding effect caused by the removal of part of the metal layer of the heat dissipation composite layer.

[0017] In one embodiment, a support film is further included, comprising a first support portion and a second support portion, wherein the first support portion is located on the side of the first display portion facing the second display portion, and the second support portion is located on the side of the second display portion facing the first display portion;

[0018] The heat dissipation composite layer is located between the first support portion and the second support portion, and the surface of the shim block facing the second support portion has a third adhesive layer, and the shim block is bonded to the second support portion through the third adhesive layer.

[0019] The above solution can fix the second support part in the thickness direction of the first support part through the second adhesive layer and the third adhesive layer, maintain the overall bending state of the display module, and prevent the display module from returning to a straight state or the bending radius from increasing due to stress.

[0020] To solve the aforementioned technical problems, another technical solution adopted in this application is to provide an electronic device. This electronic device includes the display module mentioned above.

[0021] To solve the above-mentioned technical problems, another technical solution adopted in this application is: providing a method for manufacturing a display module, the method comprising:

[0022] A display body is provided; the display body includes a display panel and a heat dissipation composite layer; wherein, the display panel includes a first display part, a bent part and a second display part connected in sequence, the heat dissipation composite layer is disposed on the side where the back of the first display part is located, and the surface of the heat dissipation composite layer opposite to the first display part has a receiving groove;

[0023] Secure the shim block to the back of the second display unit;

[0024] The bending portion is bent so that the second display portion bends to the back of the first display portion, and at least a portion of the shim block is accommodated in the receiving groove.

[0025] The beneficial effects of this application, which differ from the prior art, are as follows: The display module provided in the embodiments of this application includes a display panel, a heat dissipation composite layer, and a raised block. The display panel includes a first display portion, a bent portion, and a second display portion, which are stacked along the thickness direction of the display module. The bent portion connects the first and second display portions together. The heat dissipation composite layer is disposed between the first and second display portions, and its surface facing the second display portion has a receiving groove. The raised block is disposed on the side of the second display portion facing the first display portion, and at least a portion of the raised block is accommodated within the receiving groove. By providing a receiving groove on the heat dissipation composite layer and accommodating at least a portion of the raised block within the receiving groove, the bending radius of the display panel can be reduced, thereby achieving a narrow bezel design for the display module. Furthermore, it eliminates the need to reduce the thickness of the display panel, heat dissipation composite layer, and raised block, thus not affecting the performance of each structural layer of the display module. Simultaneously, the thickness of the raised block can be adjusted according to the required thickness for the bending radius, ensuring that the bending radius of the display panel is not limited by the thickness requirements of each structural layer. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a partial cross-sectional view of a display module provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 The diagram shown is a schematic of the module after the shims have been removed.

[0029] Figure 3 A partial cross-sectional view of a display module provided in another embodiment of this application;

[0030] Figure 4 A partial cross-sectional view of a display module provided in yet another embodiment of this application;

[0031] Figure 5 A partial cross-sectional view of a display module provided in another embodiment of this application;

[0032] Figure 6 A simplified structural diagram of an electronic device provided in an embodiment of this application;

[0033] Figure 7 A flowchart illustrating a method for fabricating a display module according to an embodiment of this application;

[0034] Figures 8-9 for Figure 7 The provided structural diagram shows the specific process flow of the display module fabrication method.

[0035] Explanation of reference numerals in the attached figures

[0036] 10-Display module; 1-Display panel; 11-First display part; 12-Bending part; 13-Second display part; 2-Support film; 21-First support part; 22-Second support part; 3-Heat dissipation composite layer; 30-Accommodation groove; 31-Metal layer; 32-Buffer layer; 33-First adhesive layer; 4-Elevating block; 41-Second adhesive layer; 42-Third adhesive layer; 43-Fourth adhesive layer. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0039] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Please see Figure 1 and Figure 2 , Figure 1 This is a partial cross-sectional view of a display module provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the structure of the display module after removing the shim. In this embodiment, a display module 10 is provided. The display module 10 can be an OLED display module 10, used to display images during operation. The display module 10 includes a display panel 1, a heat dissipation composite layer 3, and a shim 4.

[0042] The display panel 1 can be a flexible display panel 1, used to display images during operation. For example... Figure 1 As shown, the display panel 1 includes a first display portion 11, a bending portion 12, and a second display portion 13. The first display portion 11 and the second display portion 13 are stacked along the thickness direction Y of the display module 10, and the first display portion 11 and the second display portion 13 extend in a horizontal direction (i.e., a direction perpendicular to the thickness direction Y). The bending portion 12 connects one end of the first display portion 11 and one end of the second display portion 13 together; and the bending portion 12 may specifically be curved.

[0043] Specifically, the first display portion 11 of the display panel 1 is used for display, and the bending portion 12 and the second display portion 13 are used for wiring. The wiring on the bending portion 12 and the second display portion 13 controls the display of the first display portion 11. Of course, in some other embodiments, both the first display portion 11 and the bending portion 12 of the display panel 1 are used for display to improve the display effect of the display module 10; the second display portion 13 is used for wiring, and the wiring on the second display portion 13 controls the display of the first display portion 11 and the bending portion 12. Alternatively, the second display portion 13, the first display portion 11, and the bending portion 12 of the display panel 1 can all be used for display to increase the display area of ​​the display module 10.

[0044] Combination Figure 1 and Figure 2 A heat dissipation composite layer 3 is disposed between the first display unit 11 and the second display unit 13, and the surface of the heat dissipation composite layer 3 facing the second display unit 13 has a receiving groove 30. A shim block 4 is disposed on the side of the second display unit 13 facing the first display unit 11, and at least a portion of the shim block 4 is accommodated within the receiving groove 30. In this way, the distance between the first display unit 11 and the second display unit 13 can be reduced, the overall thickness of the display module 10 can be thinned, and the bending radius of the bending portion 12 can be reduced, thereby achieving a narrow bezel design for the display module 10 without reducing the thickness of the display panel 1, the heat dissipation composite layer 3, and the shim block 4, etc., of the display module 10, and without affecting the relevant performance of each structural layer of the display module 10. At the same time, the bending radius of the display panel 1 is not limited by the thickness requirements of each structural layer. Furthermore, this application chooses to open the receiving groove 30 on the heat dissipation composite layer 3. Compared with the solution of opening the receiving groove 30 on the support film of the existing display module, it can avoid the reduction of the overall support performance of the support film due to the groove in the support film when the bending part 12 is bent and pressed. Moreover, the support film has a padding block 4, which makes it more likely to cause cracks in the display panel 1 when pressed.

[0045] Furthermore, when at least a portion of the shim block 4 is accommodated within the receiving groove 30, the top surface of the shim block 4 facing away from the second display section 13 and at least a portion of the side surface of the shim block 4 are in contact with the heat dissipation composite layer 3. This increases the contact area between the shim block 4 and the heat dissipation composite layer 3, improves the sealing performance of the display module 10, and mitigates problems such as poor contact caused by moisture and other impurities entering from the location of the shim block 4. During immersion testing, due to the good sealing performance of the display module 10, the amount of acidic solution intrusion can also be reduced, effectively improving circuit short circuits or poor contact caused by acid corrosion.

[0046] The raised block 4 is made of a wave-absorbing material, enabling it to provide electromagnetic shielding. Optionally, the raised block 4 may also be made of materials such as polyethylene terephthalate (PET) or polyimide (PI).

[0047] In some embodiments, such as Figure 1 As shown, the raised blocks 4 are all accommodated within the receiving groove 30, and the surface of the raised blocks 4 facing the second display section 13 is flush with the surface of the heat dissipation composite layer 3 facing away from the first display section 11; this minimizes the bending radius of the bending section 12, achieving a narrow bezel design for the display module 10. Of course, in other embodiments, see... Figure 3 , Figure 3 This is a partial cross-sectional view of a display module 10 provided in another embodiment of this application; alternatively, a portion of the raised block 4 may be contained within the receiving groove 30, while the remaining portion of the raised block 4 may be exposed outside the receiving groove 30.

[0048] For a detailed description of the specific implementation, please refer to the following documentation. Figure 1 The display module 10 further includes a support film 2, which comprises a first support portion 21 and a second support portion 22. The first support portion 21 is located on the side of the first display portion 11 facing the second display portion 13 and is used to support the first display portion 11. The second support portion 22 is located on the side of the second display portion 13 facing the first display portion 11 and is used to support the second display portion 13. In this embodiment, the heat dissipation composite layer 3 is located between the first support portion 21 and the second support portion 22.

[0049] The first support part 21 and / or the second support part 22 can be a structure with a certain degree of support, such as a steel sheet or a copper sheet.

[0050] For details, see Figure 4 , Figure 4This is a partial cross-sectional view of a display module 10 provided in another embodiment of this application; the heat dissipation composite layer 3 includes a metal layer 31, a buffer layer 32, and a first adhesive layer 33 stacked sequentially. The first adhesive layer 33 is bonded to the side of the first display portion 11 facing the second display portion 13. Specifically, the first adhesive layer 33 can be bonded to the surface of the first support portion 21 facing the second support portion 22 to fix the heat dissipation composite layer 3 to the first support portion 21. The first adhesive layer 33 can be an adhesive layer or other existing materials that can be used for bonding. The metal layer 31 can be made of copper foil. The buffer layer 32 is used to buffer the stress on the display module 10 to protect the display panel 1; the buffer layer 32 can be foam.

[0051] In this embodiment, the receiving groove 30 is specifically formed on the metal layer 31. Compared with the existing heat dissipation composite layer where the metal layer is a single layer, in this embodiment, part of the copper foil is removed from the metal layer 31 to form the receiving groove 30. To improve the problem of poor local heat dissipation and shielding effect caused by the removal of part of the copper foil in the heat dissipation composite layer 3, the material of the shim 4 can also be copper foil. In this way, the shim 4, which is contained in the receiving groove 30, can be used for heat dissipation at the same time, effectively improving the problem of poor local heat dissipation and shielding effect caused by the removal of part of the metal layer 31 in the heat dissipation composite layer 3.

[0052] In one specific embodiment, the depth of the receiving groove 30 along the thickness direction Y of the heat dissipation composite layer 3 is less than the thickness of the metal layer 31. In this case, the shim block 4 can be selected to be fully or partially accommodated within the receiving groove 30.

[0053] In another embodiment, such as Figure 4 As shown, the receiving groove 30 penetrates the metal layer 31 along the thickness direction Y of the heat dissipation composite layer 3. It can be understood that the heat dissipation composite layer 3 in this embodiment retains the original buffer layer 32 to avoid affecting the buffering performance of the heat dissipation buffer layer 32.

[0054] For details, see Figure 5 , Figure 5 This is a partial cross-sectional view of a display module 10 provided in another embodiment of this application; the side surface of the shim 4 facing the receiving groove 30 has a second adhesive layer 41, and the shim 4 is bonded to the receiving groove 30 through the second adhesive layer 41 to be stably fixed in the receiving groove 30, so as to prevent the shim 4 from falling out of the receiving groove 30 during the bending process of the display module 10.

[0055] In some embodiments, the surface of the shim 4 facing the second support portion 22 has a third adhesive layer 42, and the shim 4 is bonded to the second support portion 22 through the third adhesive layer 42; this fixes the second support portion 22 in the thickness direction Y of the first support portion 21 through the second adhesive layer 41 and the third adhesive layer 42, maintaining the bent state of the display module 10 and preventing the display module 10 from returning to a straight state or the bending radius from increasing due to stress. The materials of the second adhesive layer 41 and the third adhesive layer 42 can be the same as or similar to the material of the first adhesive layer 33.

[0056] Of course, in specific embodiments, please refer to 5 simultaneously. A fourth adhesive layer 43 is also provided between the metal layer 31 and the buffer layer 32. The material and function of the fourth adhesive layer 43 are similar to those of the first adhesive layer 33 to the third adhesive layer 42. Specifically, it can be an adhesive layer.

[0057] The display module 10 provided in this embodiment includes a display panel 1, a support film 2, a heat dissipation composite layer 3, and a shim block 4. The display panel 1 includes a first display part 11, a bending part 12, and a second display part 13. The first display part 11 and the second display part 13 are stacked along the thickness direction Y of the display module 10. The bending part 12 connects one end of the first display part 11 and one end of the second display part 13 together. The heat dissipation composite layer 3 is disposed between the first display part 11 and the second display part 13, and the surface of the heat dissipation composite layer 3 facing the second display part 13 has a receiving groove 30. The shim block 4 is disposed on the side of the second display part 13 facing the first display part 11, and at least a portion of the shim block 4 is accommodated in the receiving groove 30. By setting a receiving groove 30 on the heat dissipation composite layer 3 and accommodating at least a portion of the shim block 4 within the receiving groove 30, the bending radius of the display panel 1 can be reduced, thereby achieving a narrow bezel design for the display module 10. Furthermore, it eliminates the need to reduce the thickness of the display panel 1, support film 2, heat dissipation composite layer 3, and shim block 4, thus not affecting the performance of each structural layer of the display module 10. Simultaneously, the thickness of the shim block 4 can be adjusted according to the required thickness for the bending radius, ensuring that the bending radius of the display panel 1 is not limited by the thickness requirements of each structural layer.

[0058] Please see Figure 6 , Figure 6 This is a simplified structural diagram of an electronic device provided in one embodiment of this application. In this embodiment, an electronic device is provided that can realize 3D display, i.e., curved surface display; specifically, it can be a watch, smartphone, tablet computer, etc. The electronic device specifically includes the display module 10 involved in any of the above embodiments. The specific structure and function of the display module 10 can be found in the specific structure and function of the display module 10 provided in the above embodiments, and can achieve the same or similar technical effects, which will not be repeated here.

[0059] Please see Figures 7 to 9 , Figure 7 A flowchart illustrating a method for fabricating a display module according to an embodiment of this application; Figures 8-9 for Figure 7 The provided structural schematic diagram shows the specific process flow of the display module fabrication method. In this embodiment, a method for fabricating a display module is provided, which can be used to fabricate the display module 10 involved in the above embodiment. The fabrication method specifically includes:

[0060] Step S1: Provide a display body; the display body includes a display panel and a heat dissipation composite layer; wherein, the display panel includes a first display part, a bent part and a second display part connected in sequence, the heat dissipation composite layer is disposed on the side where the back of the first display part is located, and the surface of the heat dissipation composite layer opposite to the first display part has a receiving groove.

[0061] For details on the specific structure of the main display element, please refer to [link / reference]. Figure 8 The specific structure and function of the display panel 1 and the heat dissipation composite layer 3, as well as their positional relationship, can be found in the relevant descriptions of the display panel 1 and the heat dissipation composite layer 3 in the display module provided in the embodiment, and will not be repeated here.

[0062] Step S2: Fix the shim block to the back of the second display unit.

[0063] Specifically, the product structure after step S2 can be found in [reference needed]. Figure 9 In some embodiments, the shim 4 can be fixed to the back of the second display unit 13 via the third adhesive layer 42. Further, the display body also includes a support film 2, which includes a first support portion 21 and a second support portion 22. The position and connection relationship between the support film 2 and the display panel 1 and the heat dissipation composite layer 3 can be found in the relevant description in the display module 10 provided in the above embodiments, and will not be repeated here. In this embodiment, the shim 4 can be bonded to the surface of the second support portion 22 facing away from the second display unit 13 via the third adhesive layer 42.

[0064] Step S3: Bend the bending portion so that the second display portion bends to the back of the first display portion and at least a portion of the pad block is accommodated in the receiving groove.

[0065] The product structure after step S3 can be found in [link to product details]. Figure 1 .

[0066] The above-mentioned method involves first fixing the shim block 4 to the back of the second display unit 13, and then bending the bending portion 12 of the display panel 1 so that the second display unit 13 bends to the back of the first display unit 11, and at least a portion of the shim block 4 is accommodated in the receiving groove 30. In this way, the limiting effect of the receiving groove 30 on the shim block 4 can be used to ensure the bending effect of step S3, so as to obtain the display module 10. This avoids the problem that the second display unit 13 will return to the same plane as the first display unit 11 under the action of bending stress.

[0067] Of course, in other embodiments, the electronic device also includes components such as batteries and fasteners. The specific structure and function of these components are the same as or similar to the specific structure and function of related components in existing electronic devices, and can achieve the same or similar technical effects. For details, please refer to the prior art, which will not be repeated here.

[0068] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display module, characterized in that, include: The display panel includes a first display part, a bending part, and a second display part. The first display part and the second display part are stacked along the thickness direction of the display module, and the bending part connects the first display part and the second display part together. A heat dissipation composite layer is disposed between the first display unit and the second display unit. The heat dissipation composite layer includes a metal layer, a buffer layer and a first adhesive layer stacked in sequence. The surface of the heat dissipation composite layer facing the second display unit has a receiving groove, which is disposed on the metal layer. A shim is disposed on the side of the second display unit facing the first display unit, and at least a portion of the shim is accommodated in the receiving groove. The material of the shim is copper foil. The support film includes a first support portion and a second support portion, wherein the first support portion is located on the side of the first display portion facing the second display portion, and the second support portion is located on the side of the second display portion facing the first display portion; the heat dissipation composite layer is located between the first support portion and the second support portion.

2. The display module according to claim 1, characterized in that, The surface of the shim block facing the second display section is flush with the side surface of the heat dissipation composite layer that is away from the first display section.

3. The display module according to claim 1, characterized in that, The first adhesive layer is bonded to the side of the first display portion facing the second display portion.

4. The display module according to claim 1, characterized in that, The depth of the receiving groove along the thickness direction of the heat dissipation composite layer is less than the thickness of the metal layer.

5. The display module according to claim 1, characterized in that, The receiving groove penetrates the metal layer along the thickness direction of the heat dissipation composite layer.

6. The display module according to any one of claims 3-5, characterized in that, The raised block has a second adhesive layer on the side surface facing the receiving groove, and the raised block is bonded to the receiving groove through the second adhesive layer.

7. The display module according to claim 3, characterized in that, Both the metal layer and the raised block are made of copper foil.

8. The display module according to claim 1, characterized in that, The raised block has a third adhesive layer on the side surface facing the second support portion, and the raised block is bonded to the second support portion through the third adhesive layer.

9. An electronic device, characterized in that, include: The display module as described in any one of claims 1-8.

10. A method for manufacturing a display module, characterized in that, include: A display body is provided; the display body includes a display panel, a heat dissipation composite layer, and a support film; wherein, the display panel includes a first display part, a bent part, and a second display part connected in sequence, the support film includes a first support part and a second support part, the first support part is disposed on the side where the back of the first display part is located, the heat dissipation composite layer is disposed on the side surface of the first support part away from the first display part, and includes a metal layer, a buffer layer, and a first adhesive layer stacked in sequence, and the side surface of the heat dissipation composite layer away from the first display part has a receiving groove, the receiving groove being disposed on the metal layer; the second support part is located on the side where the back of the second display part is located; The shim is fixed to the side surface of the second support that is away from the second display part; the shim is made of copper foil. The bending portion is bent so that the second display portion bends to the back of the first display portion, and at least a portion of the shim block is accommodated in the receiving groove; wherein the heat dissipation composite layer is located between the first support portion and the second support portion.

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