Display module, terminal device
By staggering the first and second parts of the graphite layer in the foldable display device, they overlap when unfolded and separate when folded, solving the problem of reduced heat dissipation area caused by the inability to bend the graphite layer, and improving heat dissipation speed and effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD
- Filing Date
- 2023-06-30
- Publication Date
- 2026-06-26
AI Technical Summary
In existing foldable display devices, the graphite layer cannot be bent, resulting in a reduced heat dissipation area and poor heat dissipation speed and effect.
In the foldable heat dissipation structure, the first and second parts of the graphite layer are staggered in the film thickness direction, overlapping when unfolded and separating when folded, thereby increasing the heat dissipation area.
This improves the heat dissipation speed and effect of the foldable heat dissipation structure, alleviating the problem of poor heat dissipation effect of graphite layer in the prior art.
Smart Images
Figure CN117479482B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of foldable display technology, specifically to a display module and a terminal device. Background Technology
[0002] As the refresh rate of display devices continues to increase, their heat generation is also increasing, especially at the integrated circuit chip level. This not only affects the user experience but can also damage the hardware. Typically, a graphite layer is placed under the display module to dissipate heat, utilizing its heat-dissipating properties. However, in foldable displays, because the graphite layer cannot be bent, existing foldable heat dissipation structures can only distribute the graphite layer in the non-bending areas of the foldable display, not in the bending areas. This results in heat from the IC being dissipated only in localized areas of the graphite layer, significantly reducing the heat dissipation speed and effectiveness. Therefore, it is necessary to address the problem of poor heat dissipation speed and effectiveness of the graphite layer in foldable heat dissipation structures.
[0003] Therefore, existing display modules suffer from the technical problem of poor heat dissipation performance of the graphite layer in the foldable heat dissipation structure. Summary of the Invention
[0004] This application provides a display module and a terminal device that can alleviate the technical problem of poor heat dissipation of the graphite layer in the foldable heat dissipation structure of existing display modules.
[0005] This application provides a display module, including a bent area and a non-bent area located outside the bent area, wherein the bent area and the non-bent area have a bent boundary, and the display module includes:
[0006] A foldable heat dissipation structure includes a substrate layer and a graphite layer disposed on the substrate layer. The graphite layer includes a first portion and a second portion. The first portion includes a first overlapping portion located in a bending region, and the second portion includes a second overlapping portion located in a bending region. The first overlapping portion and the second overlapping portion are offset in the film thickness direction. When the foldable heat dissipation structure is unfolded, the first overlapping portion and the second overlapping portion overlap each other to form an overlapping region. The distance between the center position of the overlapping region and one bending boundary is greater than the distance between the center position of the overlapping region and the other bending boundary. When the foldable heat dissipation structure is folded, the first overlapping portion and the second overlapping portion separate from each other.
[0007] A support layer is disposed on the side of the graphite layer away from the substrate layer;
[0008] A backplate and a display panel are sequentially disposed on the side of the support layer away from the substrate layer.
[0009] Optionally, in some embodiments of this application, the non-bending area includes a first non-bending area and a second non-bending area located on both sides of the bending area, the first non-bending area intersecting the bending area at a first bending boundary, and the second non-bending area intersecting the bending area at a second bending boundary. The first part further includes a first body located in the first non-bending area, the first body being integrally formed with the first overlapping portion. The second part further includes a second body located in the second non-bending area, the second body being integrally formed with the second overlapping portion.
[0010] Optionally, in some embodiments of this application, the first portion and the second portion of the graphite layer are offset in the film thickness direction, and the maximum vertical distance between the end of the first overlapping portion away from the first bending boundary and the first bending boundary is less than the maximum vertical distance between the end of the second overlapping portion away from the second bending boundary and the second bending boundary.
[0011] Optionally, in some embodiments of this application, a first single-sided adhesive tape is provided on the side surface of the support layer facing the first overlap portion, the adhesive side of the first single-sided adhesive tape is in contact with the support layer, and a gap is provided between the first overlap portion and the first single-sided adhesive tape.
[0012] Optionally, in some embodiments of this application, a first adhesive layer is further disposed between the substrate layer and the graphite layer, and a second adhesive layer is disposed between the graphite layer and the support layer. The first adhesive layer includes a flat portion, a recessed portion, and a protruding portion. A first body and a second body are disposed on the flat portion, a second overlapping portion is disposed on the recessed portion, and a first overlapping portion is disposed on the protruding portion. The film thickness of the recessed portion is less than the film thickness of the flat portion, and the film thickness of the flat portion is less than the film thickness of the protruding portion.
[0013] Optionally, in some embodiments of this application, the thickness of the graphite layer ranges from 20 micrometers to 50 micrometers, the thickness of the planarization layer ranges from 20 micrometers to 50 micrometers, and the thickness of the recess ranges from 10 micrometers to 25 micrometers.
[0014] Optionally, in some embodiments of this application, the substrate layer includes a first portion and a second portion arranged at intervals. The first portion has a plurality of first protrusions on the side facing the second portion, and the second portion has a plurality of second protrusions on the side facing the first portion. In the bending region, the support layer is hollowed out, and the first protrusions and the second protrusions are arranged alternately at intervals.
[0015] Optionally, in some embodiments of this application, a second single-sided tape is provided on the side surface of the first overlap and the second overlap away from the substrate in the bending area.
[0016] Optionally, in some embodiments of this application, the graphite layer is also doped with one of nano-copper or graphene.
[0017] This application provides a terminal device, which includes the foldable heat dissipation structure described in the above embodiment.
[0018] Beneficial effects: The graphite layer of the foldable heat dissipation structure of the display module is divided into a first overlapping part and a second overlapping part that are staggered in the film thickness direction during bending. When the foldable heat dissipation structure is folded, the first overlapping part and the second overlapping part are separated from each other, which does not affect the bending performance of the foldable heat dissipation structure. When the foldable heat dissipation structure is unfolded, the first overlapping part and the second overlapping part overlap each other. The overlap of different parts of the graphite layer increases the heat dissipation area, thereby improving the heat dissipation speed and heat dissipation effect of the foldable heat dissipation structure and alleviating the technical problem of poor heat dissipation effect of the graphite layer in the foldable heat dissipation structure of existing display modules. Attached Figure Description
[0019] 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.
[0020] Figure 1 This is a cross-sectional schematic diagram of the display module provided in this application when it is unfolded;
[0021] Figure 2 This is a cross-sectional schematic diagram of the foldable heat dissipation structure in the display module provided in this application when unfolded;
[0022] Figure 3 This is a cross-sectional schematic diagram of the foldable heat dissipation structure in the display module provided in this application when folded;
[0023] Figure 4 This is a schematic diagram of the first structure of the substrate layer in the foldable heat dissipation structure of the display module provided in this application;
[0024] Figure 5 This is a schematic diagram of the second structure of the substrate layer in the foldable heat dissipation structure of the display module provided in this application.
[0025] Explanation of reference numerals in the attached figures:
[0026] Detailed Implementation
[0027] 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 skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0028] Please see Figure 1 , Figure 2 , Figure 3 The display module provided in this application includes a foldable heat dissipation structure 1 and a support layer 30. The foldable heat dissipation structure 1 includes a substrate layer 10, a graphite layer 20, and a support layer 30. The graphite layer 20 is disposed on the substrate layer 10 and includes a first portion 40 and a second portion 50. The first portion 40 includes a first overlapping portion 401 located in the bending region 2, and the second portion 50 includes a second overlapping portion 501 located in the bending region 2. The support layer 30 is disposed on the side of the graphite layer 20 away from the substrate layer 10. When the foldable heat dissipation structure 1 is unfolded, the first overlapping portion 401 and the second overlapping portion 501 overlap each other. The distance between the center position of the overlapping region and one bending boundary is greater than the distance between the center position of the overlapping region and the other bending boundary. When the foldable heat dissipation structure 1 is folded, the first overlapping portion 401 and the second overlapping portion 501 separate from each other.
[0029] The display module includes a bending area 2 and a non-bending area 3 located outside the two bending boundaries of the bending area 2.
[0030] The display module 8 further includes a back plate 120, a display panel 130, a polarizer 140, an optical adhesive layer 150, and a cover plate 160, which are stacked on the side of the support layer 30 away from the foldable heat dissipation structure 1.
[0031] It is understandable that, since the overlap position of the first overlap portion 401 and the second overlap portion 501 is close to a certain bending boundary, during the process of folding the foldable heat dissipation structure 1 to unfold, the overlap portion that extends less beyond the non-bending area 3 is covered by another overlap portion that extends more beyond the non-bending area 3, thereby realizing the overlap of the first overlap portion 401 and the second overlap portion 501.
[0032] In this embodiment, the graphite layer 20 of the foldable heat dissipation structure 1 includes a first overlap portion 401 and a second overlap portion 501 located in the bending region 2. Please refer to [link to previous document]. Figure 2 When the foldable heat dissipation structure 1 is unfolded, the first overlapping portion 401 and the second overlapping portion 501 overlap each other. Please refer to [link / reference]. Figure 3 When the foldable heat dissipation structure 1 is folded (not shown in the attached diagram of the display module, but it can be understood that the back plate 120, display panel 130, polarizer 140, optical adhesive layer 150, and cover plate 160 located on the side of the support layer away from the foldable heat dissipation structure 1 also fold synchronously with the foldable heat dissipation structure 1), the first overlapping part 401 and the second overlapping part 501 separate from each other; the foldable heat dissipation structure 1 can increase the heat dissipation area by overlapping the graphite layers 20 when unfolded without affecting the folding, thereby improving the heat dissipation speed and heat dissipation effect of the foldable heat dissipation structure 1 and alleviating the technical problem of poor heat dissipation effect of the graphite layer 20 in the existing foldable heat dissipation structure 1.
[0033] The technical solution of this application will now be described in conjunction with specific embodiments.
[0034] It should be noted that the graphite layer in this application is only an example of a thermally conductive material. Replacing it with other thermally conductive materials, such as copper foil, aluminum alloy, thermally conductive silicone sheet, etc., should also fall within the scope of protection of this application.
[0035] Furthermore, the filling of each membrane layer in the accompanying drawings is merely illustrative and does not represent the actual structure of the membrane layer.
[0036] In one embodiment, please refer to Figure 2 The non-bending area 3 includes a first non-bending area 4 and a second non-bending area 5 located on both sides of the bending area 2. The first non-bending area 4 intersects the bending area 2 at a first bending boundary 6, and the second non-bending area 5 intersects the bending area 2 at a second bending boundary 7. The first part 40 also includes a first body located in the first non-bending area 4. The first body is integrally formed with the first overlapping part 401. The second part 50 also includes a second body located in the second non-bending area 5. The second body is integrally formed with the second overlapping part 501.
[0037] The thickness of the first part 40 and the second part 50 ranges from 20 micrometers to 50 micrometers.
[0038] In one embodiment, the first portion 40 is located on the side of the second portion 50 away from the substrate layer 10, and the maximum vertical distance between the end of the first overlap portion 401 away from the first bending boundary 6 and the first bending boundary 6 is less than the maximum vertical distance between the end of the second overlap portion 501 away from the second bending boundary 7 and the second bending boundary 7.
[0039] The maximum vertical distance between the end of the first overlapping portion 401 furthest from the first bending boundary 6 and the first bending boundary 6 refers to the vertical distance between the farthest end of the first overlapping portion 401 from the first bending boundary 6 and the first bending boundary 6.
[0040] The maximum vertical distance between the end of the second overlapping portion 501 away from the second bending boundary 7 and the second bending boundary 7 refers to the vertical distance between the farthest end of the second overlapping portion 501 from the second bending boundary 7 and the second bending boundary 7.
[0041] It is understandable that, due to the above-mentioned limitations on the first overlapping portion 401 and the second overlapping portion 501, during the folding or unfolding process of the foldable heat dissipation structure 1, the second overlapping portion 501 will reach the horizontal state later than the first overlapping portion 401, thereby ensuring that after the foldable heat dissipation structure 1 is unfolded, the second overlapping portion 501 can always overlap with the first overlapping portion 401 to form a heat conduction path.
[0042] In this embodiment, by positioning the first overlapping portion 401 on the side of the second overlapping portion 501 away from the substrate layer 10, and by ensuring that the first overlapping portion 401 extends slightly beyond the first bending boundary 6, the first overlapping portion 401 is prevented from collapsing due to excessive suspended area, thus improving the stability of the first overlapping portion 401 itself. At the same time, by ensuring that the second overlapping portion 501 reaches a horizontal state later than the first overlapping portion 401, it is ensured that when the foldable heat dissipation structure 1 is unfolded, the second overlapping portion 501 can always overlap with the first overlapping portion 401 to form a heat conduction path.
[0043] In one embodiment, please refer to Figure 2 A gap 90 is provided between the first overlapping part 401 and the support layer 30.
[0044] It is understandable that when the foldable heat dissipation structure 1 is unfolded, the first overlapping part 401 and the second overlapping part 501 have a large overlapping area. It is necessary to design the thickness to ensure that there is a certain squeezing force between the first overlapping part 401 and the second overlapping part 501. In order to prevent excessive interference between the first overlapping part 401 and the second overlapping part 501 due to thickness tolerance, the gap 90 is provided above the first overlapping part 401 and the support layer 30. This can effectively reduce the squeezing force between the first overlapping part 401 and the second overlapping part 501 and avoid excessive interference between the first overlapping part 401 and the second overlapping part 501 due to thickness tolerance.
[0045] In this embodiment, by providing a gap 90 between the first overlapping portion 401 and the support layer 30, excessive interference between the first overlapping portion 401 and the second overlapping portion 501 is prevented.
[0046] In one embodiment, please refer to Figure 2 , Figure 3 A first adhesive layer 60 is further disposed between the substrate layer 10 and the graphite layer 20. The first adhesive layer 60 includes a flat portion 601 and a recessed portion 602. A first portion 40 and a second body are disposed on the flat portion 601. A second overlapping portion 501 is disposed on the recessed portion 602. The film thickness of the recessed portion 602 is less than the film thickness of the flat portion 601.
[0047] The recessed portion 602 is aligned with the overlapping position.
[0048] Understandably, due to the requirement for flatness of the entire display panel 130, the first overlapping portion 401 and the second overlapping portion 501 are stacked at the overlapping position, resulting in the thickness of the graphite layer 20 at the overlapping position being greater than the thickness of the graphite layer 20 at other positions. Therefore, by providing a smaller recessed portion 602 below the second overlapping portion 501 and aligning the recessed portion 602 with the overlapping position, the overall film thickness of the foldable heat dissipation structure 1 tends to be consistent at all positions, thereby improving the flatness of the foldable heat dissipation structure 1.
[0049] In this embodiment, by making the thickness of the first adhesive layer 60 below the overlapping position less than the thickness of the first adhesive layer 60 at other positions, the thickness difference between the graphite layer 20 at the overlapping position and the graphite layer 20 at other positions is reduced, thereby improving the flatness of the foldable heat dissipation structure 1.
[0050] In one embodiment, please refer to Figure 2 , Figure 3A second adhesive layer 70 is also provided between the graphite layer 20 and the support layer 30. The second adhesive layer 70 is used to bond the adjacent graphite layer 20 and the support layer 30.
[0051] The thickness of the second adhesive layer 70 ranges from 20 micrometers to 50 micrometers.
[0052] The first adhesive layer 60 and the second adhesive layer 70 can be either optical adhesive or pressure-sensitive adhesive.
[0053] Preferably, both the first adhesive layer 60 and the second adhesive layer 70 are pressure-sensitive adhesives, thereby reducing costs.
[0054] In one embodiment, the thickness of the graphite layer 20 ranges from 20 micrometers to 50 micrometers, the thickness of the planarization layer ranges from 20 micrometers to 50 micrometers, and the thickness of the recess 602 ranges from 10 micrometers to 25 micrometers.
[0055] The thickness of the support layer 30 ranges from 100 micrometers to 150 micrometers.
[0056] It is understandable that the thickness of the first overlapping portion 401 + the thickness of the second overlapping portion 501 + the thickness of the recessed portion 602 ≈ the thickness of the first portion 40 + the thickness of the flat portion 601 below the first portion 40 ≈ the thickness of the second body + the thickness of the flat portion 601 below the second overlapping portion 501, thereby making the thickness of the graphite layer 20 + the first adhesive layer 60 at each position more consistent, and improving the overall flatness of the foldable heat dissipation structure 1.
[0057] In one embodiment, please refer to Figure 4 , Figure 5 The substrate layer 10 includes a first part and a second part arranged at intervals. The first part has a plurality of first protrusions on the side facing the second part, and the second part has a plurality of second protrusions on the side facing the first part. In the bending area 2, the support layer 30 is hollowed out, and the first protrusions and the second protrusions are arranged alternately at intervals.
[0058] The thickness of the substrate layer 10 ranges from 25 micrometers to 30 micrometers.
[0059] The support layer 30 has a hollowed-out portion 80 formed in the bending area 2. A blocking member 100 is provided on the side of the hollowed-out portion 80 near the substrate layer 10. In the film thickness direction, the blocking member 100 at least covers the hollowed-out portion 80.
[0060] The thickness of the membrane layer of the blocking member 100 ranges from 15 micrometers to 35 micrometers.
[0061] Understandably, since the support layer 30 is relatively thick, it has a significant impact on the bending performance of the bending zone 2. Therefore, it is necessary to hollow out the support layer 30 in the bending zone 2 to improve its bending performance.
[0062] It is understood that the blocking member 100 is disposed below the hollow part 80 to prevent dust from entering the foldable heat dissipation structure 1 from the hollow part 80, thereby avoiding the accumulation of dust in the foldable heat dissipation structure 1 and thus affecting the bending performance.
[0063] It is understandable that the substrate layer 10, due to its thickness being less than that of the support layer 30, has a greater impact on the bending of the bending region 2. The substrate layer 10 is designed to be staggered in the bending region 2, which can improve the stiffness of the foldable heat dissipation structure 1 in the bending region 2 and enhance its reliability. This avoids the situation where the substrate layer 10 in the bending region 2 is disconnected, resulting in unsupported areas of the substrate layer 10 in the bending region 2, which would lead to poor overall strength of the foldable heat dissipation structure 1 in the bending region 2.
[0064] In this embodiment, by hollowing out the support layer 30 and then setting a blocking member 100 to cover the hollowed-out portion 80, it not only facilitates the bending of the foldable heat dissipation structure 1, but also prevents dust from entering through the hollowed-out portion 80, thereby improving the bending performance of the bending area 2 of the foldable heat dissipation structure 1.
[0065] In one embodiment, the hollow portion 80 may be filled with a cushioning material.
[0066] In this embodiment, by filling the hollow part 80 with a buffer material, on the one hand, it can further block dust and prevent dust from entering the foldable heat dissipation structure 1 from the hollow part 80. On the other hand, it can also improve the bending resistance of the hollow part 80. The buffer material plays the role of buffering stress.
[0067] In one embodiment, please refer to Figure 2 , Figure 3 In the bending area 2, a second single-sided adhesive tape 110 is provided on the side surface of the first overlapping portion 401 and the second overlapping portion 501 away from the substrate layer 10.
[0068] The thickness of the substrate layer 10 ranges from 10 micrometers to 15 micrometers.
[0069] It is understandable that, since the graphite layer 20 is prone to falling off, the second single-sided tape 110 is used to fix the graphite layer 20, which can protect the graphite layer 20 and prevent the graphite powder of the graphite layer 20 from falling off.
[0070] In this embodiment, a second single-sided adhesive tape 110 is provided on the surface of the graphite layer 20, which can prevent the graphite powder of the graphite layer 20 from falling off and extend the service life of the graphite layer 20.
[0071] In one embodiment, the graphite layer 20 is also doped with one of nano-copper or graphene.
[0072] In this embodiment, by doping the graphite layer 20 with high thermal conductivity particles, including but not limited to one of nano-copper and graphene, the thermal conductivity of the graphite layer 20 can be improved, thereby further improving the heat dissipation speed and heat dissipation effect of the graphite layer 20.
[0073] This application also proposes a terminal device, wherein the terminal device includes, but is not limited to, a foldable display device, and the terminal device includes the above-mentioned display module 8 or foldable heat dissipation structure 1, which will not be described in detail here.
[0074] It is understood that in the display module or the terminal device, when the display panel 130 is in a folded state, the display panel 130 is off, the device generates little heat, and no further heat dissipation is required. At this time, the folding heat dissipation structure is also folded, and the first overlapping portion 401 and the second overlapping portion 501 of the graphite layer 20 are separated from each other. The separation of the graphite layer 20 facilitates the folding display module or the terminal device to be folded. When the display panel 130 is in an unfolded state, the screen of the display panel 130 is displayed, and the folding heat dissipation structure is also unfolded. The first overlapping portion 401 and the second overlapping portion 501 of the graphite layer 20 overlap each other, which can better transfer heat for heat dissipation, improving the heat dissipation speed and heat dissipation effect of the folding heat dissipation structure.
[0075] The display module provided in this application embodiment includes a foldable heat dissipation structure. The foldable heat dissipation structure includes a substrate layer, a graphite layer, and a support layer. The graphite layer is disposed on the substrate layer and includes a first portion and a second portion. The first portion includes a first overlapping portion located in a bending region, and the second portion includes a second overlapping portion located in a bending region. The support layer is disposed on the side of the graphite layer away from the substrate layer. When the foldable heat dissipation structure is unfolded, the first overlapping portion and the second overlapping portion overlap each other. The distance between the center position of the overlapping region and one bending boundary is greater than the distance between the center position of the overlapping region and the other bending boundary. When the foldable heat dissipation structure is folded, the first overlapping portion and the second overlapping portion separate from each other. By making the graphite layer of the foldable heat dissipation structure include the first overlapping portion and the second overlapping portion located in the bending area, when the foldable heat dissipation structure is unfolded, the first overlapping portion and the second overlapping portion overlap each other, and when the foldable heat dissipation structure is folded, the first overlapping portion and the second overlapping portion separate from each other. The foldable heat dissipation structure increases the heat dissipation area through the mutual overlap of the graphite layer when unfolded without affecting the folding, thereby improving the heat dissipation speed and heat dissipation effect of the foldable heat dissipation structure and alleviating the technical problem of poor heat dissipation effect of the graphite layer in existing foldable heat dissipation structures.
[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0077] The foldable heat dissipation structure, display module, and terminal device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A display module, comprising a bent area and a non-bent area located outside the bent area, wherein the bent area and the non-bent area have a bent boundary, characterized in that, The display module includes: A foldable heat dissipation structure includes a substrate layer and a graphite layer disposed on the substrate layer. The graphite layer includes a first portion and a second portion. The first portion includes a first overlapping portion located in a bending region, and the second portion includes a second overlapping portion located in a bending region. The first overlapping portion and the second overlapping portion are offset in the film thickness direction. When the foldable heat dissipation structure is unfolded, the first overlapping portion and the second overlapping portion overlap each other to form an overlapping region. The distance between the center position of the overlapping region and one bending boundary is greater than the distance between the center position of the overlapping region and the other bending boundary. When the foldable heat dissipation structure is folded, the first overlapping portion and the second overlapping portion separate from each other. A support layer is disposed on the side of the graphite layer away from the substrate layer; A backplate and a display panel are sequentially disposed on the side of the support layer away from the substrate layer.
2. The display module as described in claim 1, characterized in that, The non-bending area includes a first non-bending area and a second non-bending area located on both sides of the bending area. The first non-bending area intersects the bending area at a first bending boundary, and the second non-bending area intersects the bending area at a second bending boundary. The first part also includes a first body located in the first non-bending area, and the first body is integrally formed with the first overlapping portion. The second part also includes a second body located in the second non-bending area, and the second body is integrally formed with the second overlapping portion.
3. The display module as described in claim 2, characterized in that, The first portion and the second portion of the graphite layer are offset in the film thickness direction, and the maximum vertical distance between the end of the first overlapping portion away from the first bending boundary and the first bending boundary is less than the maximum vertical distance between the end of the second overlapping portion away from the second bending boundary and the second bending boundary.
4. The display module as described in claim 3, characterized in that, A first single-sided adhesive tape is provided on the side surface of the support layer facing the first overlap portion. The adhesive side of the first single-sided adhesive tape is in contact with the support layer, and a gap is provided between the first overlap portion and the first single-sided adhesive tape.
5. The display module as described in claim 2, characterized in that, A first adhesive layer is disposed between the substrate layer and the graphite layer, and a second adhesive layer is disposed between the graphite layer and the support layer. The first adhesive layer includes a flat portion, a recessed portion, and a protruding portion. A first body and a second body are disposed on the flat portion. A second overlapping portion is disposed on the recessed portion. A first overlapping portion is disposed on the protruding portion. The film thickness of the recessed portion is less than the film thickness of the flat portion, and the film thickness of the flat portion is less than the film thickness of the protruding portion.
6. The display module as described in claim 5, characterized in that, The thickness of the graphite layer ranges from 20 micrometers to 50 micrometers, the thickness of the flat portion ranges from 20 micrometers to 50 micrometers, and the thickness of the recessed portion ranges from 10 micrometers to 25 micrometers.
7. The display module as described in claim 1, characterized in that, The substrate layer includes a first portion and a second portion arranged at intervals. The first portion has a plurality of first protrusions on the side facing the second portion, and the second portion has a plurality of second protrusions on the side facing the first portion. In the bending area, the support layer is hollowed out, and the first protrusions and the second protrusions are arranged alternately at intervals.
8. The display module as described in claim 1, characterized in that, In the bending area, a second single-sided adhesive tape is provided on the surface of the first overlap and the second overlap away from the substrate layer.
9. The display module as described in claim 1, characterized in that, The graphite layer is also doped with either nano-copper or graphene.
10. A terminal device, characterized in that, The terminal device includes the display module as described in any one of claims 1 to 9.