Display module and display device

Abstract

The application discloses a display module and a display device. The display module comprises a bending area and non-bending areas on both sides of the bending area. The bending area comprises a bending center area and reverse bending areas on both sides of the bending center area. The display module comprises a display panel and a cover plate arranged on the light-emitting surface side of the display panel, a first adhesive layer arranged between the display panel and the cover plate and located in the bending area and the non-bending areas to bond the display panel and the cover plate. The first adhesive layer comprises a first adhesive part located in the reverse bending area, a second adhesive part located in the bending center area and a third adhesive part located in the non-bending area. The second adhesive part and the third adhesive part are uniform in thickness. The first adhesive part has a grid structure, and / or the surface of the first adhesive part away from the display panel is provided with a groove. The first adhesive part with the grid structure or the groove can reduce the risk of bubbles easily generated in the first adhesive part of the reverse bending area.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] In related technologies, teardrop-shaped bendable display modules have two symmetrical folding areas. During the bending process, the adhesive layer (such as OAC, Optically Clear Adhesive) in the display module is subjected to the greatest hydrostatic pressure at the folding area. This causes the adhesive layer to fail after prolonged bending, and air bubbles are easily generated in the adhesive layer at the folding area, resulting in low product reliability. Summary of the Invention

[0003] This application provides a display module and display device that can reduce the problem of air bubbles forming in the adhesive layer at the folding area.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: A display module is provided, the display module including a bending area and non-bending areas located on both sides of the bending area, the bending area including a bending center area and anti-bending areas located on both sides of the bending center area, the display module comprising:

[0005] The display panel is located in the bent area and the non-bent area;

[0006] A cover plate is disposed on one side of the light-emitting surface of the display panel and located in the bending area and the non-bending area, for protecting the display panel;

[0007] A first adhesive layer is disposed between the display panel and the cover plate and located in the bending area and the non-bending area, for bonding the display panel and the cover plate. The first adhesive layer includes a first adhesive portion located in the folding area, a second adhesive portion located in the bending center area, and a third adhesive portion located in the non-bending area. The second adhesive portion and the third adhesive portion are both film layers of uniform thickness. The first adhesive portion has a mesh structure, and / or the surface of the first adhesive portion facing away from the display panel is provided with a groove.

[0008] Wherein, the first adhesive part has a mesh structure, and the aperture of the mesh structure is not completely equal; preferably, in the direction from the middle of the folded area to the adjacent non-bending area, the aperture of the mesh structure gradually decreases; preferably, in the direction from the middle of the folded area to the bending center area, the aperture of the mesh structure gradually decreases; preferably, the aperture of the mesh in the mesh structure is less than or equal to 0.5 mm.

[0009] The first adhesive part has a mesh structure, and the spacing of the mesh holes in the mesh structure is not completely equal; preferably, the spacing of the mesh holes in the mesh structure gradually increases in the direction from the middle of the folded area to the adjacent non-bending area; preferably, the spacing of the mesh holes in the mesh structure gradually increases in the direction from the middle of the folded area to the bending center area; preferably, the spacing of the mesh holes in the mesh structure is greater than or equal to 0.5 mm.

[0010] The first adhesive part has a mesh structure, and the mesh holes in the mesh structure are one or more of polygons or circles.

[0011] The groove is an arc-shaped groove; preferably, the depth of the groove is between one-quarter and one-half of the thickness of the first adhesive part; preferably, the depth of the groove is equal to one-third of the thickness of the first adhesive part.

[0012] Wherein, the elastic modulus at each position of the first adhesive portion is not completely equal; preferably, in the direction from the middle of the folded area to the adjacent non-bending area, the elastic modulus of the first adhesive portion gradually increases; preferably, in the direction from the middle of the folded area to the bending center area, the elastic modulus of the first adhesive portion gradually increases.

[0013] Wherein, in the direction from the bending area to the non-bending area, the width of the first adhesive portion ranges from 5mm to 10mm; preferably, the material of the first adhesive layer includes optically transparent adhesive.

[0014] The display panel includes: a display layer having a light-emitting surface and a backlight surface disposed opposite to each other; a polarizer connected to the light-emitting surface, and the first adhesive layer being bonded between the polarizer and the cover plate.

[0015] The display module further includes: a support member disposed on one side of the backlight surface of the display layer; and a second adhesive layer bonded between the support member and the backlight surface of the display layer. Preferably, the support member is made of any one of steel sheet, titanium, or organic material. Preferably, the second adhesive layer is made of double-sided adhesive.

[0016] To solve the above-mentioned technical problems, this application adopts a technical solution: providing a display device, including the display module described above.

[0017] Beneficial effects: By setting a first adhesive part with a mesh-like structure or groove, this application can improve the material ductility of the first adhesive part in the folding area and reduce the accumulation of bending stress in the first adhesive part in the folding area, thereby reducing the risk of air bubbles easily forming in the first adhesive part in the folding area and improving the product reliability of the display module. Attached Figure Description

[0018] 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, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a display module with a teardrop-shaped bending structure in the prior art;

[0020] Figure 2 This is a schematic diagram of the structure of a display module provided in one embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a first adhesive portion having a mesh-like structure according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of a structure in which the first adhesive portion has a groove, according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of a mesh structure with gradually changing apertures provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of a mesh structure with gradually changing apertures provided in another embodiment of this application;

[0025] Figure 7 This is a schematic diagram of a mesh structure provided in an embodiment of this application, where the aperture and spacing of the mesh are equal.

[0026] Figure 8 This is a schematic diagram of a mesh structure with gradually changing mesh spacing provided in an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the display module in an unfolded state according to an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the groove structure provided in one embodiment of this application;

[0029] Figure 11 This is a structural block diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Please see Figure 1 , Figure 1This is a schematic diagram of a folded display module 1 with a teardrop-shaped bending structure. The foldable display module 1 typically includes a flexible display screen 1a, a flexible cover plate 1b, and OCA (Optically Clear Adhesive) adhesive 1c disposed between the flexible display screen 1a and the flexible cover plate 1b. The display module 1 includes a bending region 101a, non-bending regions 101b located on opposite sides of the bending region 101a, and a transition region 101c (i.e., a reverse bending region) located between the bending region 101a and the non-bending region 101b. Because the teardrop-shaped bending structure has superior inward bending force, it is generally designed and developed to replace the U-shaped bending structure. Figure 1 As shown, the teardrop-shaped bending structure has two symmetrical transition zones 101c (i.e., the reverse bending zone, where the front of the flexible display screen arches, while other areas are where the back of the flexible display screen arches, hence the reverse bending). This zone exhibits the highest hydrostatic pressure of the OCA adhesive 1c during the bending test. Hydrostatic pressure characterizes the resultant force of the adhesive's shear stress and normal stress. After prolonged bending of the display module, the cohesive failure of OCA1c occurs, and bubbles are generated inside the OCA adhesive 1c, i.e., OCA bubbles. This failure is more likely to occur at high temperatures because the cohesive force of the OCA adhesive 1c decreases at high temperatures compared to room temperature.

[0034] To address the aforementioned problems, embodiments of the present invention provide a display module, and the following description, in conjunction with the accompanying drawings, illustrates various embodiments of the display module.

[0035] Please refer to the following: Figure 2 , Figure 3 and Figure 4 In one embodiment of this application, a display module 100 is provided. The display module 100 includes a bending area 101 and non-bending areas 102 located on both sides of the bending area 101. The bending area 101 includes a bending center area 1011 and anti-bending areas 1012 located on both sides of the bending center area 1011. The bending center area 1011 is located in the central region of the bending area 101 and has the greatest deformation after bending. When the bending area 101 is bent into a teardrop shape, the bending area 101 located below the teardrop after bending is the bending center area 1011. The display module 100 in the non-bending area 102 does not bend. At the same time, the boundary between the non-bending area 102 and the bending area 101 is the starting point of the anti-bending area 1012, which extends from the starting point towards the bending center area 1011. It is understandable that the bending direction of the bending center area 1011 is opposite to the bending direction of the reverse bending area 1012.

[0036] The display module 100 includes a display panel 10, a cover plate 20, and a first adhesive layer 30 disposed between the display panel 10 and the cover plate 20. The display panel 10 is used to realize the display function of the display module 100, and the cover plate 20 is used to protect the display panel 10.

[0037] Specifically, the display panel 10 is located in the bending area 101 and the non-bending area 102, and is used to display images. It is the main display component in the display module 100, ensuring that the display module 100 can maintain good visual effects even when bent.

[0038] The display panel 10 of this application can be an OLED display panel, or it can be an LCD display panel (Liquid Crystal Display), a Micro-LED display panel (Micro Light Emitting Diode), or other types of display panels. This application does not limit the specific type of the display panel 10.

[0039] The cover plate 20 is disposed on the light-emitting surface (not shown) of the display panel 10 and located in the bending area 101 and the non-bending area 102, for protecting the display panel 10 and reducing the risk of damage to the display panel 10 due to external physical contact. In one embodiment, the cover plate 20 may specifically be an ultra-thin glass.

[0040] The first adhesive layer 30 is disposed between the display panel 10 and the cover plate 20 and is located in the bending area 101 and the non-bending area 102, for bonding the display panel 10 and the cover plate 20. The first adhesive layer 30 includes a first adhesive portion 31 located in the folding area 1012, a second adhesive portion 32 located in the bending center area 1011, and a third adhesive portion 33 located in the non-bending area 102. The second adhesive portion 32 and the third adhesive portion 33 are both film layers of uniform thickness, which helps to maintain the overall flatness and stability of the bending center area 1011 and the non-bending area 102 of the display panel 10.

[0041] in, Figure 3 This is a schematic diagram of the first adhesive portion 31 having a mesh-like structure. Compared to a continuous film structure, the mesh-like structure has higher flexibility and adaptability. This structure allows air bubbles generated during bending of the first adhesive portion 31 to escape through the mesh-like structure. Simultaneously, by reducing the continuity of the material, the mesh-like structure of the first adhesive portion 31 enhances creep recovery performance, further evenly distributes stress, and reduces stress generated during bending, thereby lowering the risk of cohesive failure of the first adhesive portion 31 under bending conditions.

[0042] in, Figure 4The diagram shows a groove 311 provided for the first adhesive part 31. The surface of the first adhesive part 31 facing away from the display panel 10 may also be provided with a groove 311 to achieve a thinning effect of the first adhesive part 31 in the folding area 1012, thereby reducing the stress generated during bending and improving the problem of air bubbles easily generated during the bending process of the first adhesive part 31.

[0043] In one embodiment, the first adhesive portion 31 has only a mesh structure; in another embodiment, the first adhesive portion 31 has only a groove 311; and in yet another embodiment, a portion of the first adhesive portion 31 has a mesh structure and a portion of the first adhesive portion 31 has a groove 311.

[0044] When the display module 100 is folded, it bends around the bending center area 1011 in the bending area 101, forming a teardrop-shaped bending structure. Since the portion of the display panel 10 corresponding to the non-bending area 102 is not bent, the non-bending area 102 is flat. The bending center area 1011 and the reverse folding area 1012 in the bending area 101 undergo repeated folding as the foldable display module 100 is folded and unfolded. By using the partitioned structure design described above for the first adhesive layer 30 between the display panel 10 and the cover plate 20—that is, by providing a mesh structure or grooves 311 in the first adhesive portion 31—the stress on the first adhesive portion 31 can be reduced, thereby improving the problem of air bubbles easily forming in the first adhesive portion 31.

[0045] In the above-mentioned display module 100, by providing a first adhesive portion 31 with a mesh structure or groove 311, the material ductility of the first adhesive portion 31 at the folding area 1012 can be improved, and the accumulation of bending stress in the first adhesive portion 31 at the folding area 1012 can be reduced, thereby reducing the risk of air bubbles easily forming in the first adhesive portion 31 at the folding area 1012 and improving the product reliability of the display module 100.

[0046] In the above embodiment, the folded area 1012 is provided with a first adhesive portion 31. However, it should be noted that in other embodiments, the folded area 1012 may not be provided with a first adhesive portion 31. That is, during the preparation process, after the entire first adhesive layer 30 is formed, the first adhesive layer 30 of the folded area 1012 is hollowed out. This makes the first adhesive layer 30 not affected by stress when the folded area 1012 is bent, so that no air bubbles will appear in the first adhesive layer 30 at the folded area 1012.

[0047] Please refer to the following: Figure 3 and Figure 4In one embodiment, the width L of the first adhesive portion 31 in the direction from the bending region 101 to the non-bending region 102 ranges from 5mm to 10mm. For example, the width L of the first adhesive portion 31 can be 5mm, 7.5mm, or 10mm, and is not limited here.

[0048] Please see Figure 2 In one embodiment, the material of the first adhesive layer 30 includes optically clear adhesive (OCA). The optically clear adhesive has a good elastic modulus and can undergo corresponding elastic deformation according to the bending of the display module 100. Simultaneously, the transparent first adhesive layer 30, while bonding the display panel 10 and the cover plate 20, also ensures that the light-emitting performance of the display panel 10 located beneath the first adhesive layer 30 is not affected by the color of the film layer of the first adhesive layer 30, thereby improving the display effect of the display module 100.

[0049] In one embodiment, when the first adhesive portion 31 has a mesh-like structure, the mesh openings 312 of the mesh-like structure can be formed by laser, etching, or other methods. When a groove 311 is provided on the first adhesive portion 31, the groove 311 can also be formed by laser, etching, or other methods, and there is no limitation on this.

[0050] Please refer to the following: Figure 3 , Figure 5 and Figure 6 In one embodiment, when the first adhesive portion 31 has a mesh-like structure, the apertures of the mesh 312 are not completely equal. That is, the first adhesive portion 31 adopts a mesh-like structure with non-uniform apertures in the folding region 1012. Different aperture sizes allow the first adhesive layer 30 to better adapt to complex bending patterns and different degrees of bending stress. It is understood that the aperture of the mesh 312 can be optimized according to the specific needs of the first adhesive portion 31 in different areas of the folding region 1012. For example, a larger aperture is used in areas expected to undergo greater deformation to provide greater deformation space; while a smaller aperture is used in areas requiring higher strength support to enhance local rigidity.

[0051] Please continue reading. Figure 3 , Figure 5 and Figure 6In one embodiment, in the direction X1 from the center of the folded region 1012 towards the adjacent non-bending region 102, the aperture of the mesh structure 312 gradually decreases. The gradient size of the mesh 312 allows for a smoother stress transition when the region is bent, reducing cracks, delamination, or bubbles caused by stress concentration. The smaller mesh 312, located closer to the non-bending region 102, provides necessary rigid support for the display panel 10, preventing excessive deformation or damage. The larger mesh 312, located in the center of the folded region 1012, allows for greater bending freedom and provides more space for the first adhesive portion 31 to expand and contract under stress, increasing the flexibility of the display module 100 in the critical bending region 101.

[0052] Please continue reading. Figure 3 , Figure 5 and Figure 6 In one embodiment, in the direction X2 from the center of the folding region 1012 towards the bending center region 1011, the aperture of the mesh structure 312 gradually decreases. The gradient size of the mesh 312 allows for a smoother stress transition in this area when bent, reducing cracks, delamination, or bubbles caused by stress concentration. The smaller mesh 312, located closer to the bending center region 1011, provides necessary rigid support for the display panel 10, preventing excessive deformation or damage. The larger mesh 312, located in the center of the folding region 1012, allows for greater bending freedom and provides more space for the first adhesive portion 31 to expand and contract under stress, increasing the flexibility of the display module 100 in the critical bending region 101.

[0053] It is understandable that the aperture of the mesh structure 312 can be gradually reduced only in the direction X1 from the middle of the folded region 1012 to the adjacent non-bending region 102, or only in the direction X2 from the middle of the folded region 1012 to the bending center region 1011; or the aperture of the mesh structure 312 can be gradually reduced in both the direction X1 from the middle of the folded region 1012 to the adjacent non-bending region 102 and the direction X2 from the middle of the folded region 1012 to the bending center region 1011.

[0054] In one embodiment, the aperture of the mesh 312 of the grid structure can be reduced uniformly or non-uniformly in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011, without any limitation.

[0055] In one embodiment, the aperture of the mesh 312 in the same row of the grid structure along the length of the first adhesive layer 30 can be the same. Obviously, in other embodiments, the aperture of the mesh 312 in the same row of the grid structure along the length of the first adhesive layer 30 can also be different, as long as it is ensured that the aperture of the mesh 312 of the multiple grid structures is the same and gradually decreases in size in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011.

[0056] Please see Figure 7 In other embodiments, all the mesh openings 312 of the mesh structure may have the same aperture, thereby simplifying the preparation process.

[0057] In one embodiment, the aperture of the mesh 312 in the mesh structure is less than or equal to 0.5 mm. For example, the aperture of the mesh 312 in the mesh structure is 0.5 mm, 0.4 mm, or 0.35 mm.

[0058] Please refer to the following: Figure 3 and Figure 8 In one embodiment, the first adhesive portion 31 has a mesh-like structure, and the spacing of the mesh openings 312 is not completely equal. By adjusting the spacing between the mesh openings 312, the stress generated during bending can be better distributed. For example, in areas expected to experience greater deformation or higher stress, a larger mesh opening spacing 312 is used to provide greater deformation space and improve flexibility; while in areas requiring more support, the mesh opening spacing 312 is reduced to increase local stiffness, thereby reducing stress concentration and ensuring that the display module 100 maintains its structural integrity and stability even under frequent or long-term bending.

[0059] Please continue reading. Figure 3 and Figure 8 In one embodiment, in the direction X1 from the center of the folded region 1012 towards the adjacent non-bending region 102, the spacing of the mesh openings 312 of the grid structure gradually increases, which can more effectively disperse stress during bending. The larger mesh opening spacing 312, closer to the non-bending region 102, provides more space to absorb and disperse stress, reducing the risk of damage caused by stress concentration in this area. The smaller mesh opening spacing 312, located in the center of the folded region 1012, provides necessary support to maintain structural stability and reduces the risk of excessive deformation of the first bonding portion 31 during frequent or prolonged bending.

[0060] Please continue reading. Figure 3 and Figure 8In one embodiment, in the direction X2 from the center of the folding region 1012 towards the bending center region 1011, the spacing of the mesh openings 312 of the grid structure gradually increases, which can more effectively disperse stress during bending. The larger mesh opening spacing 312, closer to the bending center region 1011, provides more space to absorb and disperse stress, reducing the risk of damage caused by stress concentration in this area. The smaller mesh opening spacing 312, located in the center of the folding region 1012, provides necessary support to maintain structural stability and reduces the risk of excessive deformation of the first bonding portion 31 during frequent or prolonged bending.

[0061] It is understandable that the spacing of the mesh 312 of the grid structure can be gradually increased only in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or only in the direction X2 from the middle of the folded area 1012 to the bending center area 1011; or the spacing of the mesh 312 of the grid structure can be gradually increased in both the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102 and the direction X2 from the middle of the folded area 1012 to the bending center area 1011. There are no restrictions on this.

[0062] In one embodiment, the spacing of the mesh 312 of the grid structure can be increased uniformly or unevenly in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011, without any limitation.

[0063] In one embodiment, in the length direction of the first adhesive layer 30, the spacing between adjacent mesh openings 312 in the same row of the mesh structure can be the same. Obviously, in other embodiments, in the length direction of the first adhesive layer 30, the spacing between adjacent mesh openings 312 in the same row of the mesh structure can also be different, as long as it is ensured that the spacing between the mesh openings 312 of the multiple mesh structures gradually increases in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011.

[0064] Please refer to it again. Figure 7 In other embodiments, the spacing between all the mesh openings 312 of the mesh structure can also be completely equal, thereby simplifying the preparation process.

[0065] In one embodiment, the spacing of the mesh openings 312 in the mesh structure is greater than or equal to 0.5 mm. For example, the aperture of the mesh openings 312 in the mesh structure is 0.5 mm, 0.6 mm, or 0.75 mm.

[0066] In one embodiment, such as Figure 6 As shown, in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011, the aperture of the mesh 312 of the grid structure gradually decreases while the spacing of the mesh 312 of the grid structure can be further gradually increased.

[0067] In one embodiment, such as Figure 7 As shown, in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011, the mesh apertures 312 of the mesh structure are equal, and the spacing of the mesh apertures 312 of the mesh structure is also equal.

[0068] Please refer to the following: Figure 5 and Figure 6 In one embodiment, the first adhesive portion 31 has a mesh-like structure, and the mesh openings 312 in the mesh-like structure are one or more of polygons or circles. When the mesh openings 312 in the mesh-like structure are polygons, the polygons can be rhombuses, rectangles, hexagons or other irregular shapes. When the mesh openings 312 in the mesh-like structure are circles, the mesh openings 312 can be circles or ellipses, and there are no restrictions.

[0069] Understandably, depending on different functional requirements, the mesh openings 312 in the grid structure can all be polygonal, all be circular, or a combination of both. For example, circular mesh openings 312 can be used in areas requiring greater flexibility, while polygonal mesh openings 312 can be used in areas requiring more support, thus meeting diverse needs.

[0070] It should be noted that since rhombuses or rectangles only have two sides, their shapes are relatively simple. Consequently, the patterns used to form the grid structure are also relatively simple, which reduces the difficulty of manufacturing the process molds.

[0071] It should also be noted that the mesh openings 312 of the grid structure are arranged in an array. In practical applications, the mesh can also be arranged sequentially along a preset direction. That is to say, this embodiment does not specifically limit the arrangement of the mesh in the grid structure, and can be set according to actual needs. Providing a grid structure on the first adhesive part 31 is beneficial for eliminating air bubbles. In addition, when the mesh openings 312 in the grid structure are arranged in an array, this embodiment does not specifically limit the number of mesh openings 312 in each column or the number of rows, and can be set according to actual needs.

[0072] Please refer to the following: Figure 4 , Figure 9and Figure 10 In one embodiment, the groove 311 is an arc-shaped groove. The arc-shaped structure can better adapt to the bending deformation of the first adhesive part 31, which helps to distribute the stress generated during bending more evenly, thereby improving the problem of air bubbles easily generated in the first adhesive part 31. At the same time, the arc-shaped groove is recessed in the direction away from the cover plate 20, that is, towards the display panel 10 to achieve the thinning of the first adhesive part 31. This is opposite to the bending direction of the reverse folding area 1012. The two complement each other, effectively releasing the shear force generated during bending, while also reducing the risk of reverse arching and creases caused by reverse arching in the reverse folding area 1012, thereby improving the display performance of the display module 100.

[0073] It is understandable that the shape of the groove 311 can also be other geometric shapes, and there are no restrictions here.

[0074] Please see Figure 10 In one embodiment, the depth of the groove 311 ranges from one-quarter to one-half the thickness of the first adhesive portion 31. This provides necessary support for the first adhesive portion 31 while also offering some flexibility for stress release during bending. It is understood that a suitable groove depth helps to distribute the stress generated during bending more evenly. A shallower groove 311 (relative to the overall thickness of the first adhesive portion 31) will not excessively weaken the rigidity of the first adhesive portion 31, while allowing a certain degree of deformation to adapt to bending requirements, thereby preventing cracks or delamination caused by localized stress concentration.

[0075] In this embodiment, the depth of the groove 311 is equal to one-third of the thickness of the first adhesive portion 31.

[0076] Please refer to the following: Figure 2 and Figure 3 In one embodiment, the elastic modulus at different locations of the first adhesive portion 31 is not completely equal, meaning the first adhesive portion 31 has non-uniform elastic properties. Elastic modulus is a parameter used to measure the ability of a solid material to resist deformation; it describes how easily a material undergoes elastic deformation under stress. A higher elastic modulus indicates greater hardness and less susceptibility to elastic deformation; conversely, a lower elastic modulus indicates lower hardness and relative ease of deformation.

[0077] Specifically, by adjusting the elastic modulus at different locations of the first adhesive portion 31, stress can be managed and dispersed more effectively during bending. For example, a material with a lower elastic modulus can be used in areas where greater deformation or higher stress is expected. The lower elastic modulus increases the flexibility of the material in these areas, allowing for more deformation and reducing stress concentration, thus enabling the display module 100 to better adapt to bending actions. In areas where more support is needed, a material with a higher elastic modulus can be used to provide the necessary rigid support for the display module 100.

[0078] Please continue reading. Figure 2 and Figure 3 In one embodiment, the elastic modulus of the first adhesive portion 31 gradually increases in the direction X1 from the center of the folded region 1012 toward the adjacent non-bending region 102. By allowing the elastic modulus to gradually increase from the center of the folded region 1012 toward the non-bending region 102, stress can be more effectively dispersed during bending. A higher elastic modulus closer to the non-bending region 102 can provide more rigid support and reduce the risk of damage caused by stress concentration in this area; while a lower elastic modulus located in the center of the folded region 1012 allows for greater deformation to alleviate local stress.

[0079] Please continue reading. Figure 2 and Figure 3 In one embodiment, the elastic modulus of the first adhesive portion 31 gradually increases in the direction X2 from the center of the folding region 1012 toward the bending center region 1011. By allowing the elastic modulus to gradually increase from the center of the folding region 1012 toward the bending center region 1011, stress can be more effectively distributed during bending. The location near the bending center region 1011 bears the greatest deformation and stress; a higher elastic modulus can provide more rigid support and reduce the risk of damage to this area due to excessive deformation. Conversely, a lower elastic modulus located in the center of the folding region 1012 allows for greater deformation to alleviate localized stress.

[0080] The gradient elastic modulus design of the first adhesive portion 31 in two directions helps to enhance the overall durability of the display module 100, especially under frequent or long-term bending conditions. This ensures that the first adhesive portion 31 is sufficiently flexible while also providing additional protection and support for critical areas of the display module 100.

[0081] It is understood that the elastic modulus of the first adhesive portion 31 may be gradually increased only in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or the elastic modulus of the first adhesive portion 31 may be gradually increased only in the direction X2 from the middle of the folded area 1012 to the bending center area 1011; or the elastic modulus of the first adhesive portion 31 may be gradually increased in both the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102 and the direction X2 from the middle of the folded area 1012 to the bending center area 1011, and no restriction is imposed here.

[0082] In one embodiment, the elastic modulus of the first adhesive portion 31 may increase uniformly or unevenly in the direction X1 from the middle of the folded area 1012 to the adjacent non-bending area 102, or in the direction X2 from the middle of the folded area 1012 to the bending center area 1011, without limitation.

[0083] Please refer to the following: Figure 2 and Figure 9 In one embodiment, the display panel 10 includes a display layer 11 and a polarizer 12. The display layer 11 is used to display images and has a light-emitting surface and a backlight surface (not shown) disposed opposite to each other. The polarizer 12 is connected to the light-emitting surface to filter light and improve the image quality of the display layer 11. A first adhesive layer 30 is bonded between the polarizer 12 and the cover plate 20 to ensure the stability of the display module 100 structure, thereby improving the overall optical performance (such as increasing light transmittance and reducing reflection).

[0084] Please continue reading. Figure 2 and Figure 9 In one embodiment, the display module 100 further includes a support member 40 and a second adhesive layer 50. The support member 40 is disposed on the backlight side of the display layer 11. When the display panel 10 is bent, the support member 40 supports the display panel 10 to keep the display surface of the display panel 10 flat, without affecting the display effect, and improving the rigidity and stability of the entire display module 100. The second adhesive layer 50 is bonded between the support member 40 and the backlight side of the display layer 11, ensuring a tight bond between the display layer 11 and the support member 40, and reducing the risk of delamination of the display module 100.

[0085] In one embodiment, the material of the support member 40 includes any one of steel sheet, titanium, or organic material. These materials have good rigidity and can effectively support the display panel 10.

[0086] In one embodiment, the steel sheet comprises stainless steel.

[0087] In one embodiment, the material of the second adhesive layer 50 includes double-sided adhesive, which can provide strong adhesion to ensure that the support 40 is tightly attached to the display panel 10 and improve the overall structural stability of the display module 100.

[0088] Please see Figure 2 , Figure 3 , Figure 4 and Figure 11 This application also provides a display device 200, including the above-described display module 100.

[0089] As described above, when the display device 200 with the aforementioned display module 100 is folded, it bends around the bending center area 1011 in the bending area 101, thus forming a teardrop-shaped bending structure. Since the portion of the display panel 10 corresponding to the non-bending area 102 is not bent, the non-bending area 102 is flat, while the bending center area 1011 and the reverse folding area 1012 in the bending area 101 undergo repeated folding as the foldable display module 100 is folded and unfolded. By using the partitioned structure design described above for the first adhesive layer 30 between the display panel 10 and the cover plate 20, i.e., by providing a mesh structure or groove 311 in the first adhesive portion 31, the stress on the first adhesive portion 31 can be reduced, thereby improving the problem of air bubbles easily forming in the first adhesive portion 31.

[0090] The aforementioned display device 200 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, or digital photo frame.

[0091] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations 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 patent protection scope of this application.

Claims

1. A display module, characterized in that, The display module includes a bending area and non-bending areas located on both sides of the bending area. The bending area includes a bending center area and reverse bending areas located on both sides of the bending center area. The display module includes: The display panel is located in the bent area and the non-bent area; A cover plate is disposed on one side of the light-emitting surface of the display panel and located in the bending area and the non-bending area, for protecting the display panel; A first adhesive layer is disposed between the display panel and the cover plate and located in the bending area and the non-bending area, for bonding the display panel and the cover plate. The first adhesive layer includes a first adhesive portion located in the folding area, a second adhesive portion located in the bending center area, and a third adhesive portion located in the non-bending area. The second adhesive portion and the third adhesive portion are both film layers of uniform thickness. The first adhesive portion has a mesh structure, and / or the surface of the first adhesive portion facing away from the display panel is provided with a groove.

2. The display module according to claim 1, characterized in that, The first adhesive part has a mesh-like structure, and the pore sizes of the mesh-like structure are not completely equal; Preferably, in the direction from the middle of the folded area to the adjacent non-folded area, the aperture of the mesh structure gradually decreases; Preferably, in the direction from the middle of the folded area to the bending center area, the aperture of the mesh structure gradually decreases; Preferably, the aperture of the mesh in the grid structure is less than or equal to 0.5 mm.

3. The display module according to claim 1, characterized in that, The first adhesive part has a mesh-like structure, and the spacing of the mesh holes in the mesh-like structure is not completely equal; Preferably, in the direction from the middle of the folded area to the adjacent non-folded area, the spacing of the mesh openings of the grid structure gradually increases; Preferably, in the direction from the middle of the folded area to the bending center area, the spacing of the mesh of the grid structure gradually increases; Preferably, the spacing between the mesh openings in the mesh structure is greater than or equal to 0.5 mm.

4. The display module according to claim 1, characterized in that, The first adhesive part has a mesh structure, and the mesh holes in the mesh structure are one or more of polygons or circles.

5. The display module according to claim 1, characterized in that, The groove is an arc-shaped groove; Preferably, the depth of the groove ranges from one-quarter to one-half of the thickness of the first adhesive portion; Preferably, the depth of the groove is equal to one-third of the thickness of the first adhesive portion.

6. The display module according to claim 1, characterized in that, The elastic modulus at different locations of the first adhesive portion is not completely equal; Preferably, in the direction from the middle of the folded area to the adjacent non-bending area, the elastic modulus of the first adhesive portion gradually increases; Preferably, in the direction from the middle of the folded area to the bending center area, the elastic modulus of the first adhesive portion gradually increases.

7. The display module according to claim 1, characterized in that, In the direction from the bending area to the non-bending area, the width of the first adhesive portion ranges from 5mm to 10mm; Preferably, the material of the first adhesive layer includes an optically transparent adhesive.

8. The display module according to claim 1, characterized in that, The display panel includes: The display layer has a light-emitting surface and a backlight surface disposed opposite to each other; A polarizer is attached to the light-emitting surface, and the first adhesive layer is bonded between the polarizer and the cover plate.

9. The display module according to claim 8, characterized in that, The display module also includes: A support member is provided on one side of the backlight surface of the display layer; A second adhesive layer is bonded between the support member and the backlight surface of the display layer; Preferably, the material of the support includes any one of steel sheet, titanium, or organic material; Preferably, the material of the second adhesive layer includes double-sided adhesive.

10. A display device, characterized in that, The display module includes any one of claims 1-9 above.

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