Support backplate, display module and display device

Abstract

This application relates to a support backplate, a display module, and a display device. The support backplate has a first region, a second region, and a third region sequentially arranged along a first direction. The support backplate includes: a first fiber layer comprising a plurality of first fibers extending along a second direction; a second fiber layer disposed on one side of the first fiber layer, comprising a plurality of second fibers extending along the first direction; a third fiber layer disposed on the side of the second fiber layer opposite to the first fiber layer, comprising a plurality of third fibers extending along the second direction; and a plurality of first grooves disposed in the first region and / or the third region, the first grooves extending along the first direction on the first fiber layer, the depth of the first grooves being greater than or equal to one-third of the thickness of the support backplate, and the second direction being perpendicular to the first direction.

Description

Technical Field

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

[0002] With the development of technology, foldable display products have become a hot topic, especially flexible foldable products, which have become a popular trend in the development of electronic products.

[0003] However, while the support components used in current flexible foldable OLED modules have gradually improved in terms of folding performance, their bending performance and reliability still cannot meet the requirements for flexible folding in a teardrop shape. Summary of the Invention

[0004] Based on this, this application proposes a support backplate, a display module, and a display device to improve the bending performance and reliability of the support backplate, so that it meets the performance requirements of the display device when flexibly folded in a teardrop shape, thereby improving the bending performance and reliability of the display module and the display device.

[0005] This application embodiment provides a support backplate, the support backplate having a first region, a second region, and a third region sequentially arranged along a first direction, the support backplate comprising:

[0006] A first fiber layer, the first fiber layer comprising a plurality of first fibers extending along a second direction;

[0007] A second fiber layer is disposed on one side of the first fiber layer, and the second fiber layer includes a plurality of second fibers extending along the first direction;

[0008] A third fiber layer is disposed on the side of the second fiber layer opposite to the first fiber layer, the third fiber layer comprising a plurality of third fibers extending along the second direction; and

[0009] A plurality of first grooves are disposed in the first region and / or the third region, the first grooves extending along the first direction on the first fiber layer, the depth of the first grooves being greater than or equal to one-third of the thickness of the support back plate, and the second direction being perpendicular to the first direction.

[0010] Furthermore, based on the same inventive concept, this application also provides a display module including the aforementioned support backplate.

[0011] Thirdly, embodiments of this application also provide a display device including the above-described display module.

[0012] In this application, the support backplate has a first region, a second region, and a third region sequentially arranged along a first direction. The first region and the third region can be bent through the second region. Further, the support backplate includes a first fiber layer, a second fiber layer, and a third fiber layer. The extension directions of the first and third fibers are parallel to the bending axis, thereby generating less bending stress when the support backplate is bent. The extension direction of the second fiber is perpendicular to the bending axis, which helps to improve the bending recovery capability of the support backplate. Further, the support backplate is also provided with a first groove, which extends along the first direction on the first fiber layer, and its extension direction is parallel to the extension direction of the second fiber. This reduces the number of second fibers cut by the first groove, thereby further improving the bending recovery capability of the support backplate. Further, the first groove is located in at least one of the first region and the third region, and the depth of the first groove is greater than or equal to one-third of the thickness of the support backplate, thereby further reducing the bending stress and elastic modulus of at least one of the first region and the third region. Thus, compared to the support backplates in related technologies, the support backplate of this application has stronger bending recovery capability, and lower bending stress and elastic modulus in the first and third regions, thereby improving the bending performance of the support backplate and enabling the teardrop-shaped bending of the support backplate. Secondly, since the number of second fibers cut by the first groove is reduced, the probability of internal stress in the support backplate caused by the first groove is reduced, thereby reducing the probability of partial deformation, warping, and other conditions during the processing of the support backplate, and further improving the reliability of the support backplate. Attached Figure Description

[0013] Figure 1 This is a top view schematic diagram of one of the supporting back plates according to an embodiment of this application;

[0014] Figure 2 for Figure 1 A top view of the first fiber layer of the supporting backplate;

[0015] Figure 3 for Figure 1 A top view of the third fiber layer supporting the backplate;

[0016] Figure 4 for Figure 1 A top view of the second fiber layer supporting the backplate;

[0017] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the supporting back plate AA shown.

[0018] Figure 6 This is a top view schematic diagram of another supporting back plate according to an embodiment of this application;

[0019] Figure 7 This is a top view schematic diagram of another supporting back plate according to an embodiment of this application;

[0020] Figure 8 for Figure 7 A top view of the second fiber layer supporting the backplate;

[0021] Figure 9 for Figure 7 A top view of the first fiber layer of the supporting backplate;

[0022] Figure 10 for Figure 7 A top view of the third fiber layer supporting the backplate;

[0023] Figure 11 This is a top view schematic diagram of another supporting back plate according to an embodiment of this application;

[0024] Figure 12 for Figure 11 A top view of the second fiber layer supporting the backplate;

[0025] Figure 13 for Figure 11 A top view of the first fiber layer of the supporting backplate;

[0026] Figure 14 for Figure 11 A top view of the third fiber layer supporting the backplate;

[0027] Figure 15 This is a top view schematic diagram of another supporting back plate according to an embodiment of this application;

[0028] Figure 16 for Figure 15 A top view of the second fiber layer supporting the backplate;

[0029] Figure 17 for Figure 15 A top view of the first fiber layer of the supporting backplate;

[0030] Figure 18 for Figure 15 A top view of the third fiber layer supporting the backplate;

[0031] Figure 19 This is a top view schematic diagram of another supporting back plate according to an embodiment of this application;

[0032] Figure 20 for Figure 19 A top view of the first fiber layer of the supporting backplate;

[0033] Figure 21 for Figure 19 A top view of the third fiber layer supporting the backplate;

[0034] Figure 22 for Figure 19 A top view of the second fiber layer supporting the backplate;

[0035] Figure 23 This is a top view schematic diagram of another supporting back plate according to an embodiment of this application;

[0036] Figure 24 for Figure 23 A top view of the first fiber layer of the supporting backplate;

[0037] Figure 25 for Figure 23 A top view of the third fiber layer supporting the backplate;

[0038] Figure 26 for Figure 23 A top view of the second fiber layer supporting the backplate;

[0039] Figure 27 This is a top view of one embodiment of the first fiber layer in this application.

[0040] Figure 28 This is a top view of one of the third fiber layers in an embodiment of this application. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] With technological advancements, foldable display products have become a hot topic, especially flexible foldable products, which have become a popular trend in electronic product development. However, regarding current flexible foldable OLED modules, although the support components used in these modules have gradually improved in terms of folding performance, their bending performance and reliability still cannot meet the requirements for flexible folding in a teardrop shape.

[0048] Based on the above problems, the applicant discovered that fiber is a good supporting material for several reasons. First, fiber materials are lightweight, which can reduce the overall weight of the supporting backplate, thereby reducing the overall weight of the device. Second, the fiber layer contains fibrous materials, which have good bending performance. Third, fibers are anisotropic materials, with different mechanical properties in different directions. Data shows that the tensile strength of fiber materials in the 0° direction (parallel to the fiber extension direction S) is much greater than that in the 90° direction (perpendicular to the fiber extension direction S). Thus, by reasonably setting the arrangement and stacking of fibers, it can also have good supporting performance and reliability, making it applicable to flexible foldable display modules. Therefore, the applicant further developed the technical solution of the embodiments of this application. Specifically, this application proposes a supporting backplate, which has a first region, a second region, and a third region arranged sequentially along a first direction. The supporting backplate includes a first fiber layer, a second fiber layer, a third fiber layer, and a plurality of first grooves disposed in at least one of the first region and / or the third region. The first fiber layer includes a plurality of first fibers extending along a second direction. A second fiber layer is disposed on one side of the first fiber layer, and the second fiber layer includes multiple second fibers extending along the first direction. A third fiber layer is disposed on the side of the second fiber layer opposite to the first fiber layer, and the third fiber layer includes multiple third fibers extending along the second direction. A first groove extends on the first fiber layer along the first direction, and the depth of the first groove is greater than or equal to one-third of the thickness of the support backing plate, and the second direction is perpendicular to the first direction. In the above scheme, the support backing plate has a first region, a second region, and a third region arranged sequentially along the first direction. The first region and the third region can be bent through the second region. In one aspect, the support backing plate includes a first fiber layer, a second fiber layer, and a third fiber layer. The extension directions of the first fiber and the third fiber are parallel to the bending axis, thereby generating a smaller bending stress when the support backing plate is bent. The extension direction of the second fiber is perpendicular to the bending axis, thereby improving the bending recovery capability of the support backing plate. The first groove extends on the first fiber layer along the first direction, and its extension direction is parallel to the extension direction of the second fiber. In this way, the number of second fibers cut by the first groove can be reduced, thereby further improving the bending recovery capability of the support backing plate. Furthermore, the first groove is located in at least one of the first and third regions, and the depth of the first groove is greater than or equal to one-third of the thickness of the support back plate. This can further reduce the bending stress and elastic modulus of at least one of the first and third regions, making it easier to bend. This improves the bending performance of the support back plate, thereby facilitating the teardrop-shaped bending of the support back plate.Secondly, since the number of second fibers cut by the first groove is reduced, it is also beneficial to reduce the probability of internal stress generated in the support back plate due to the setting of the first groove. This can reduce the probability of half-deformation, warping and other conditions during the processing of the support back plate, and further improve the reliability of the support back plate.

[0049] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0050] An embodiment of the first aspect of this application provides a support backplate 10. For example... Figures 1 to 5 As shown, the support back plate 10 has a first region 10a, a second region 10b, and a third region 10c arranged sequentially along a first direction X. (See Figures 1 and 2.) Figure 2 As shown, the support backplate 10 includes a first fiber layer 11, a second fiber layer 12, a third fiber layer 13, and a plurality of first grooves 14 disposed in at least one of the first region 10a and the third region 10c. The first fiber layer 11 includes a plurality of first fibers 111 extending along a second direction Y. The second fiber layer 12 is disposed on one side of the first fiber layer 11 and includes a plurality of second fibers 121 extending along a first direction X. The third fiber layer 13 is disposed on the side of the second fiber layer 12 opposite to the first fiber layer 11 and includes a plurality of third fibers 131 extending along the second direction Y. The first grooves 14 extend on the first fiber layer 11 along the first direction X, and the depth H of the first grooves 14 is greater than or equal to one-third of the thickness of the support backplate 10. The second direction Y is perpendicular to the first direction X. The thickness direction of the support backplate 10 is set as the third direction Z.

[0051] like Figure 1 As shown, the support backplate 10 of this application has a first region 10a, a second region 10b, and a third region 10c arranged sequentially along a first direction X. The first region 10a and the third region 10c can be flexibly folded through the second region 10b. That is, the second region 10b is the bending area of ​​the support backplate 10. When the display panel is bent, the second region 10b can bend synchronously with the display panel, thereby supporting the bending area of ​​the display panel. The second region 10b and the first region 10a can support the unbent area of ​​the display panel.

[0052] The supporting backplate 10 includes a first fiber layer 11, a second fiber layer 12, and a third fiber layer 13. For example... Figure 5As shown, the fiber layer refers to a film structure formed by doping a fiber material with a resin substrate 115, with the resin substrate 115 filling the gaps between the fiber filaments. Specifically, the first fiber layer 11 includes first fibers 111 extending along the second direction Y. That is, the extension direction of the first fibers 111 is parallel to the bending axis L of the support back plate 10, thereby reducing the bending stress of the first fiber layer 11. The second fiber layer 12 includes multiple second fibers 121 extending along the first direction X. Thus, the extension direction of the second fibers 121 is perpendicular to the bending axis L of the support back plate 10, and when the support back plate 10 is bent, the second fiber layer 12 can provide the bending recovery capability of the support back plate 10. The third fiber layer 13 includes multiple third fibers 131 extending along the second direction Y. The extension direction of the third fibers 131 is the same as the extension direction of the first fibers 111, thereby reducing the bending stress of the third fiber layer 11. Thus, through this layering method, while ensuring support performance, both bending stress and bending recovery capability can be reduced.

[0053] The supporting backplate 10 also includes a first groove 14. The first groove 14 is a non-through groove. The first groove 14 extending along the first direction X on the first fiber layer 11 means that the first groove 14 opens on the first fiber layer 11 and its depth extends toward the third fiber layer 13. Furthermore, the length direction of the first groove 14 is parallel to the first direction X.

[0054] In this application, the extension directions of the first fiber 111 and the third fiber 131 are parallel to the bending axis L of the support back plate 10, thereby generating less bending stress when the support back plate 10 is bent. The extension direction of the second fiber 121 is perpendicular to the bending axis L of the support back plate 10, which helps to improve the bending recovery capability of the support back plate 10. The first groove 14 extends along the first direction X on the first fiber layer 11, and its extension direction X is parallel to the extension direction of the second fiber 121. In this way, the number of second fibers 121 that are completely cut off by the first groove 14 in the second fiber layer 12 can be reduced, thereby further improving the bending recovery capability of the support back plate 10. Furthermore, the first groove 14 is located in at least one of the first region 10a and the third region 10c, and the depth of the first groove 14 is greater than or equal to one-third of the thickness of the support back plate 10, thereby also reducing the bending stress and elastic modulus of at least one of the first region 10a and the third region 10c. When the support backplate 10 is applied to a teardrop-shaped bent display screen in related technologies, in addition to the second region 10b needing to be bent, the first region 10a and the third region 10c also need to be partially bent. Therefore, the support backplate 10 of this application has lower bending stress and elastic modulus in at least one of the first region 10a and the third region 10c, making it easier to bend. This improves the bending performance of the support backplate 10, thereby facilitating the teardrop-shaped bending of the support backplate 10. Secondly, since the number of second fibers 121 cut by the first groove 14 is reduced, it also helps to reduce the probability of internal stress generated within the support backplate 10 due to the first groove 14, thereby reducing the probability of partial deformation, warping, etc., during the processing of the support backplate 10, and further improving the reliability of the support backplate 10.

[0055] In some embodiments, the thickness of the second fiber layer 12 is greater than or equal to two-thirds of the thickness of the support backing plate 10. Since the second fiber layer 12 is related to the bending recovery capability of the support backing plate 10, setting the thickness of the second fiber layer 12 to be greater than or equal to two-thirds of the thickness of the support backing plate 10 is beneficial to improving the bending recovery capability of the support backing plate 10, thereby improving the bending performance of the support backing plate 10.

[0056] In some embodiments, the thickness D1 of the first fiber layer 11 satisfies: 15μm ≤ D1 ≤ 40μm. When the thickness D1 of the first fiber layer 11 is within the above range, it is beneficial to reduce the bending stress of the support backing plate 10, thereby improving the bending performance of the support backing plate 10. In this embodiment, the thickness D1 of the first fiber layer 11 is related to the diameter of the first fiber 111 and the number of stacked layers of the first fiber 111. The number of stacked layers of the first fiber 111 refers to the number of layers of the first fiber 111 that can be stacked along the thickness direction of the support backing plate 10, i.e., the third direction Z, according to the diameter of the first fiber 111. In other words, the first fiber layer 11 can have multiple sub-fiber layers, in which the first fiber 111 in each sub-fiber layer extends along the second direction Y and is arranged at intervals along the first direction X. Figure 5 As shown, the number of sub-fiber layers in the first fiber layer 11 is 2. Of course, it can also be 3, 5, 6, etc. This application does not limit it, as long as the first fiber 111 is reasonably arranged and stacked so that its thickness meets the above range.

[0057] In some embodiments, the thickness D2 of the second fiber layer 12 satisfies: 60μm ≤ D2 ≤ 140μm. When the thickness D2 of the second fiber layer 12 is within the above range, it is beneficial to improve the bending recovery capability of the support backing plate 10, thereby improving the bending performance of the support backing plate 10. In this embodiment, the thickness D2 of the second fiber layer 12 is related to the diameter of the second fiber 121 and the number of stacked layers of the second fiber 121. The number of stacked layers of the second fiber 121 refers to the number of layers of the second fiber 121 that can be stacked along the third direction Z, according to the diameter of the second fiber 121. In other words, the second fiber layer 12 can have multiple sub-fiber layers, in which the second fibers 121 extend along the first direction X and are spaced apart along the second direction Y. Figure 5 As shown, the number of sub-fiber layers in the second fiber layer 12 is 8. Of course, it can also be 5, 6, 9, etc. This application does not limit it, as long as the second fiber 121 is reasonably arranged and stacked so that its thickness meets the above range.

[0058] In some embodiments, the thickness D3 of the third fiber layer 13 satisfies: 15μm ≤ D1 ≤ 40μm. When the thickness D3 of the third fiber layer 13 is within the above range, it is beneficial to reduce the bending stress of the support backing plate 10, thereby improving the bending performance of the support backing plate 10. In this embodiment, the thickness D3 of the third fiber layer 13 is related to the diameter of the third fiber 131 and the number of stacked layers of the third fiber 131. The number of stacked layers of the third fiber 131 refers to the number of layers of the third fiber 131 that can be stacked along the third direction Z according to the diameter of the third fiber 131. In other words, the third fiber layer 13 can have multiple sub-fiber layers, and the third fibers 131 in each sub-fiber layer extend along the first direction X and are spaced apart along the second direction Y. Figure 5 As shown, the number of sub-fiber layers in the first fiber layer 11 is 2. Of course, it can also be 3, 4, 5, etc. This application does not limit this, as long as the third fiber 131 is reasonably arranged and stacked so that its thickness meets the above range.

[0059] In some embodiments, such as Figure 6 As shown, the plurality of first grooves 14 include at least one of the following: rectangular groove 14a, elliptical groove 14b, hourglass-shaped groove 14c, dog bone-shaped groove 14d, and waist-shaped groove 14e. This embodiment proposes multiple shapes for the first grooves 14. The first grooves 14 are mainly used to reduce the bending stress and elastic modulus of the first region 10a or the third region 10c. The aforementioned shapes of the first grooves 14 are relatively common, thereby improving the diversity and ease of manufacture of the first grooves 14. In addition, the first grooves 14 can also have other shapes, as long as their length direction extends along the first direction X.

[0060] In some embodiments, such as Figure 1 As shown, the multiple first grooves 14 have the same shape. This facilitates the manufacturing of the first grooves 14 and reduces costs.

[0061] In some embodiments, such as Figure 1 As shown, a plurality of first grooves 14 are disposed within a first region 10a and a third region 10c. The plurality of first grooves 14 located in the first region 10a and the plurality of first grooves 14 located in the third region 10c are symmetrically arranged along the extension line of the second direction Y. This has several advantages: First, it improves the ease of manufacturing the first grooves 14 and reduces costs. Second, it helps to simultaneously reduce the bending stress in both the first region 10a and the third region 10c, resulting in better bending performance of the support back plate 10. Third, the symmetrical arrangement of the plurality of first grooves 14 located in the first region 10a and the plurality of first grooves 14 located in the third region 10c along the extension line of the second direction Y also helps to make the bending stress in the first region 10a and the third region 10c more consistent, thereby improving the ease of bending.

[0062] In some embodiments, such as Figure 7 As shown, within the first region 10a, a plurality of first grooves 14 are arranged in a single row at intervals along the second direction Y. This helps to reduce the bending stress in the first region 10a, thereby improving the bending performance of the support back plate 10.

[0063] Alternatively, in some embodiments, such as Figure 8 As shown, in the second fiber layer 12, second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. The orthographic projection of the first groove 14 on the second fiber layer 12 is located in the second region 12b. In this embodiment, within the first region 10a, a plurality of first grooves 14 are arranged in a single row at intervals along the second direction Y. Furthermore, the orthographic projection of the first groove 14 on the second fiber layer 12 is located in the second region 12b. The arrangement density of the second fibers 121 in the second region 12b is less than that in the first region 12a. This helps to further reduce the number of second fibers 121 that are completely cut off by the first groove 14 in the second fiber layer 12, thereby improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the first groove 14, thus improving the bending performance and reliability of the support back plate 10. It should be noted that the arrangement density of the second fibers 121 refers to the tightness between adjacent second fibers 121. When adjacent second fibers 121 are densely arranged, it indicates a high fiber density in that region; when they are sparsely arranged, it indicates a low fiber density in that region. That is, the boundary between the first region 12a and the second region 12b is determined by the density of the second fibers 121. In the first region 12a, the second fibers 121 are densely arranged; in the second region 12b, the second fibers 121 are sparsely arranged, or even absent.

[0064] Optionally, such as Figure 9 As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. The orthographic projection of the first groove 14 on the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 cut by the first groove 14 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0065] In some embodiments, such as Figure 11 As shown, within the third region 10c, multiple first grooves 14 are arranged in a single row at intervals along the second direction Y. This helps to reduce the bending stress in the third region 10c, thereby improving the bending performance of the support back plate 10.

[0066] Alternatively, in some embodiments, such as Figure 12 As shown, in the second fiber layer 12, second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. The orthographic projection of the first groove 14 on the second fiber layer 12 is located in the second region 12b. In this embodiment, within the third region 10c, a plurality of first grooves 14 are arranged in a single-row interval along the second direction Y. Furthermore, the orthographic projection of the first groove 14 on the second fiber layer 12 is located in the second region 12b. The arrangement density of the second fibers 121 in the second region 12b is less than that in the first region 12a. This helps to further reduce the number of second fibers 121 that are completely cut off by the first groove 14 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the setting of the first groove 14, which in turn helps to improve the bending performance and reliability of the support back plate 10.

[0067] Alternatively, in some embodiments, such as Figure 13 As shown, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than that in the fourth region 11b. The orthographic projection of the first groove 14 on the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 cut by the first groove 14 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0068] In some embodiments, such as Figure 15 As shown, in the first region 10a and the third region 10c, a plurality of first grooves 14 are arranged in a single row at intervals along the second direction Y. This helps to reduce the bending stress in the first region 10a and the third region 10c, thereby improving the bending performance of the support back plate 10.

[0069] Alternatively, in some embodiments, such as Figure 16As shown, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. The orthographic projection of the first groove 14 on the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the first groove 14 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the first groove 14, thus improving the bending performance and reliability of the support back plate 10.

[0070] Alternatively, in some embodiments, such as Figure 17 As shown, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than that in the fourth region 11b. The orthographic projection of the first groove 14 on the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 cut by the first groove 14 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0071] In some embodiments, such as Figure 1 As shown, the support back plate 10 also includes a plurality of through slots 15 disposed within the second region 10b, the through slots 15 extending along the second direction Y. In this embodiment, the support back plate 10 further includes through slots 15. The through slots 15 are disposed in the second region 10b, thereby helping to reduce the bending stress in the second region 10b, and thus helping to improve the bending performance of the support back plate 10. In addition, the through slots 15 extend along the second direction Y, and their length direction is parallel to the bending axis L, thereby helping to further reduce the bending stress in the second region 10b.

[0072] In some embodiments, such as Figure 1 As shown, through slots 15 are arranged at intervals along the first direction X. This helps to reduce the manufacturing difficulty of the through slots 15 and reduce the cost of the supporting back plate 10.

[0073] Optionally, such as Figure 2As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. At least a portion of the orthographic projection of the through-groove 15 on the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 intersecting with the through-groove 15 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10. It should be noted that "at least a portion of the orthographic projection of the through-groove 15 on the first fiber layer 11 is located in the fourth region 11b" means that the entire orthographic projection of the through-groove 15 on the first fiber layer 11 is located in the fourth region 11b, or that a portion of the orthographic projection of the through-groove 15 on the first fiber layer 11 is located in the fourth region 11b.

[0074] Optionally, such as Figure 3 As shown, in some embodiments, in the third fiber layer 13, the third fibers 131 are arranged at intervals along the first direction X. The third fiber layer 13 includes a fifth region 13a and a sixth region 13b arranged along the first direction X. The arrangement density of the third fibers 131 in the fifth region 13a is greater than the arrangement density of the third fibers 131 in the sixth region 13b. At least a portion of the orthographic projection of the through-groove 15 onto the third fiber layer 13 is located in the sixth region 13b. This helps to reduce the number of third fibers 131 intersecting with the through-groove 15 in the third fiber layer 13, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10. It should be noted that "at least a portion of the orthographic projection of the through-groove 15 onto the third fiber layer 13 is located in the sixth region 13b" means that the entire orthographic projection of the through-groove 15 onto the third fiber layer 13 is located in the sixth region 13b, or that a portion of the orthographic projection of the through-groove 15 onto the third fiber layer 13 is located in the sixth region 13b.

[0075] Optionally, such as Figure 4As shown, in some embodiments, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. At least a portion of the orthographic projection of the through-groove 15 onto the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the through-groove 15 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the through-groove 15, thus improving the bending performance and reliability of the support back plate 10. It should be noted that "at least a portion of the orthographic projection of the through groove 15 on the second fiber layer 12 is located in the second region 12b" means that the entire orthographic projection of the through groove 15 on the second fiber layer 12 is located in the second region 12b, or that a portion of the orthographic projection of the through groove 15 on the second fiber layer 12 is located in the second region 12b.

[0076] In some embodiments, such as Figure 11 As shown, through slots 15 are arranged at intervals along the second direction Y. This helps to reduce the manufacturing difficulty of the through slots 15 and reduce the cost of the supporting back plate 10.

[0077] Optionally, such as Figure 13 As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. At least a portion of the orthographic projection of the through groove 15 onto the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 intersecting with the through groove 15 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0078] Optionally, such as Figure 14 As shown, in some embodiments, in the third fiber layer 13, the third fibers 131 are arranged at intervals along the first direction X. The third fiber layer 13 includes a fifth region 13a and a sixth region 13b arranged along the first direction X. The arrangement density of the third fibers 131 in the fifth region 13a is greater than the arrangement density of the third fibers 131 in the sixth region 13b. At least a portion of the orthographic projection of the through groove 15 onto the third fiber layer 13 is located in the sixth region 13b. This helps to reduce the number of third fibers 131 intersecting with the through groove 15 in the third fiber layer 13, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0079] Optionally, such as Figure 12 As shown, in some embodiments, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. At least a portion of the orthographic projection of the through-groove 15 onto the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the through-groove 15 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the through-groove 15, thus improving the bending performance and reliability of the support back plate 10.

[0080] In some embodiments, such as Figure 7 As shown, through slots 15 are arranged at intervals along the first direction X; through slots 15 are also arranged at intervals along the second direction Y. That is, the through slots 15 are arranged in an array in the second region 10b. This helps to reduce the manufacturing difficulty of the through slots 15 and reduce the cost of the supporting back plate 10.

[0081] Optionally, such as Figure 9 As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. At least a portion of the orthographic projection of the through groove 15 onto the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 intersecting with the through groove 15 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0082] Optionally, such as Figure 10 As shown, in some embodiments, in the third fiber layer 13, the third fibers 131 are arranged at intervals along the first direction X. The third fiber layer 13 includes a fifth region 13a and a sixth region 13b arranged along the first direction X. The arrangement density of the third fibers 131 in the fifth region 13a is greater than the arrangement density of the third fibers 131 in the sixth region 13b. At least a portion of the orthographic projection of the through groove 15 onto the third fiber layer 13 is located in the sixth region 13b. This helps to reduce the number of third fibers 131 intersecting with the through groove 15 in the third fiber layer 13, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0083] Optionally, such as Figure 8 As shown, in some embodiments, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. At least a portion of the orthographic projection of the through-groove 15 onto the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the through-groove 15 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the through-groove 15, thus improving the bending performance and reliability of the support back plate 10.

[0084] In some embodiments, such as Figure 15 As shown, through slots 15 are arranged at intervals along the first direction X, with adjacent through slots 15 being staggered. This prevents the fibers in the second region 10b from breaking at the same location, thereby further improving the support performance of the support back plate 10.

[0085] Optionally, such as Figure 17 As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. At least a portion of the orthographic projection of the through groove 15 onto the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 intersecting with the through groove 15 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0086] Optionally, such as Figure 18 As shown, in some embodiments, in the third fiber layer 13, the third fibers 131 are arranged at intervals along the first direction X. The third fiber layer 13 includes a fifth region 13a and a sixth region 13b arranged along the first direction X. The arrangement density of the third fibers 131 in the fifth region 13a is greater than the arrangement density of the third fibers 131 in the sixth region 13b. At least a portion of the orthographic projection of the through groove 15 onto the third fiber layer 13 is located in the sixth region 13b. This helps to reduce the number of third fibers 131 intersecting with the through groove 15 in the third fiber layer 13, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0087] Optionally, such as Figure 16As shown, in some embodiments, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. At least a portion of the orthographic projection of the through-groove 15 onto the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the through-groove 15 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the through-groove 15, thus improving the bending performance and reliability of the support back plate 10.

[0088] In some embodiments, such as Figure 19 As shown, through slots 15 are arranged at intervals along the second direction Y, with adjacent through slots 15 being staggered. This prevents the fibers in the second region 10b from breaking at the same location, thereby further improving the support performance of the backing plate 10.

[0089] Optionally, such as Figure 20 As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. At least a portion of the orthographic projection of the through groove 15 onto the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 intersecting with the through groove 15 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0090] Optionally, such as Figure 21 As shown, in some embodiments, in the third fiber layer 13, the third fibers 131 are arranged at intervals along the first direction X. The third fiber layer 13 includes a fifth region 13a and a sixth region 13b arranged along the first direction X. The arrangement density of the third fibers 131 in the fifth region 13a is greater than the arrangement density of the third fibers 131 in the sixth region 13b. At least a portion of the orthographic projection of the through groove 15 onto the third fiber layer 13 is located in the sixth region 13b. This helps to reduce the number of third fibers 131 intersecting with the through groove 15 in the third fiber layer 13, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0091] Optionally, such as Figure 22As shown, in some embodiments, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. At least a portion of the orthographic projection of the through-groove 15 onto the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the through-groove 15 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the through-groove 15, thus improving the bending performance and reliability of the support back plate 10.

[0092] In some embodiments, such as Figure 23 As shown, along the first direction X, the through grooves 15 are arranged at intervals, with adjacent through grooves 15 staggered; along the second direction Y, the through grooves 15 are arranged at intervals, with adjacent through grooves 15 staggered. This avoids the fibers in the second region 10b from breaking at the same location, thereby further improving the support performance of the support back plate 10.

[0093] Optionally, such as Figure 24 As shown, in some embodiments, in the first fiber layer 11, the first fibers 111 are arranged at intervals along the first direction X. The first fiber layer 11 includes a third region 11a and a fourth region 11b arranged along the first direction X. The arrangement density of the first fibers 111 in the third region 11a is greater than the arrangement density of the first fibers 111 in the fourth region 11b. At least a portion of the orthographic projection of the through groove 15 onto the first fiber layer 11 is located in the fourth region 11b. This helps to reduce the number of first fibers 111 intersecting with the through groove 15 in the first fiber layer 11, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0094] Optionally, such as Figure 25 As shown, in some embodiments, in the third fiber layer 13, the third fibers 131 are arranged at intervals along the first direction X. The third fiber layer 13 includes a fifth region 13a and a sixth region 13b arranged along the first direction X. The arrangement density of the third fibers 131 in the fifth region 13a is greater than the arrangement density of the third fibers 131 in the sixth region 13b. At least a portion of the orthographic projection of the through groove 15 onto the third fiber layer 13 is located in the sixth region 13b. This helps to reduce the number of third fibers 131 intersecting with the through groove 15 in the third fiber layer 13, thereby improving the support strength of the support back plate 10 and thus improving the support reliability of the support back plate 10.

[0095] Optionally, such as Figure 26As shown, in some embodiments, in the second fiber layer 12, the second fibers 121 are arranged at intervals along the second direction Y. The second fiber layer 12 includes a first region 12a and a second region 12b arranged along the second direction Y. The arrangement density of the second fibers 121 in the first region 12a is greater than that in the second region 12b. At least a portion of the orthographic projection of the through-groove 15 onto the second fiber layer 12 is located in the second region 12b. This helps to reduce the number of second fibers 121 that are completely cut off by the through-groove 15 in the second fiber layer 12, thereby further improving the bending recovery capability of the support back plate 10 and reducing the probability of internal stress generated in the support back plate 10 due to the through-groove 15, thus improving the bending performance and reliability of the support back plate 10.

[0096] In some embodiments, such as Figure 27 As shown, in the first fiber layer 11, the density of the first fibers 111 located in the second region 10b is less than the density of the first fibers 111 located in at least one of the first regions 10a and the third region 10c. This helps to reduce the number of first fibers 111 cut by the through groove 15 in the second region 10b, thereby improving the support strength of the support back plate 10. Furthermore, the higher density of the first fibers 111 in at least one of the first regions 10a and the third region 10c further enhances the support strength of the support back plate 10.

[0097] In some embodiments, such as Figure 28 As shown, in the third fiber layer 13, the arrangement density of the third fibers 131 located in the second region 10b is less than the arrangement density of the third fibers 131 located in at least one of the first region 10a and the third region 10c. This helps to reduce the number of third fibers 131 cut by the through groove 15 in the second region 10b, thereby improving the support strength of the support back plate 10. Furthermore, the higher density of the third fibers 131 in at least one of the first region 10a and the third region 10c also helps to further improve the support strength of the support back plate 10.

[0098] The second aspect of this application provides a display module including a display panel and a support backplate 10 as described in the first aspect, wherein the support backplate 10 is disposed on the backlight side of the display panel. This application uses the support backplate 10 of the first aspect to support the display panel. In the first aspect, at least one of the first region 10a and the third region 10c has low bending stress and low modulus of elasticity, making it easier to bend. This improves the bending performance of the support backplate 10, thereby facilitating the teardrop-shaped bending of the support backplate 10. In the second aspect, since the number of second fibers 121 cut by the first groove 14 is reduced, it also helps to reduce the probability of internal stress generated within the support backplate 10 due to the first groove 14, thereby reducing the probability of partial deformation, warping, etc., during the processing of the support backplate 10, and further improving the reliability of the support backplate 10.

[0099] An embodiment of the third aspect of this application provides a display device including the display module described in the second aspect. The display device of this application uses the support backplate 10 described in the first aspect, which facilitates teardrop-shaped folding and thus improves the portability of the display device. The display device can be an electronic product such as a mobile phone, computer monitor, or tablet; this application does not limit it to this, as long as it is an electronic product with display functionality.

[0100] In summary, in the support backplate, display module, and display device provided in this application embodiment, the extension directions of the first and third fibers are parallel to the bending axis, thereby generating less bending stress when the support backplate is bent. The extension direction of the second fiber is perpendicular to the bending axis, which helps to improve the bending recovery capability of the support backplate. The first groove extends along a first direction on the first fiber layer, and its extension direction is parallel to the extension direction of the second fiber. This reduces the number of second fibers cut by the first groove, thereby further improving the bending recovery capability of the support backplate. Furthermore, the first groove is located in at least one of the first and third regions, and the depth of the first groove is greater than or equal to one-third of the thickness of the support backplate, which can further reduce the bending stress and elastic modulus of at least one of the first and third regions, making it easier to bend. This helps to improve the bending performance of the support backplate, and thus helps to achieve the teardrop-shaped bending of the support backplate. Secondly, since the number of second fibers cut by the first groove is reduced, it is also beneficial to reduce the probability of internal stress generated in the support back plate due to the setting of the first groove. This can reduce the probability of half-deformation, warping and other conditions during the processing of the support back plate, and further improve the reliability of the support back plate.

[0101] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A support backplate, the support backplate having a first region, a second region, and a third region sequentially arranged along a first direction, characterized in that, The supporting back plate includes: A first fiber layer, the first fiber layer comprising a plurality of first fibers extending along a second direction; A second fiber layer is disposed on one side of the first fiber layer, and the second fiber layer includes a plurality of second fibers extending along the first direction; A third fiber layer is disposed on the side of the second fiber layer opposite to the first fiber layer, the third fiber layer comprising a plurality of third fibers extending along the second direction; and A plurality of first grooves are provided in the first region and / or the third region, the first grooves extending along the first direction on the first fiber layer, the depth of the first grooves being greater than or equal to one-third of the thickness of the support back plate, and the second direction being perpendicular to the first direction. In the first region and / or the third region, a plurality of the first grooves are arranged in a single row at intervals along the second direction; In the second fiber layer, the second fibers are spaced apart along the second direction. The second fiber layer includes a first region and a second region arranged along the second direction. The arrangement density of the second fibers in the first region is greater than the arrangement density of the second fibers in the second region. The orthographic projection of the first groove on the second fiber layer is located in the second region.

2. The supporting back plate according to claim 1, characterized in that, The thickness of the second fiber layer is greater than or equal to two-thirds of the thickness of the support back plate.

3. The supporting back plate according to claim 1, characterized in that, The thickness D1 of the first fiber layer satisfies: 15μm≤D1≤40μm; And / or, the thickness D2 of the second fiber layer satisfies: 60μm≤D2≤140μm; And / or, the thickness D3 of the third fiber layer satisfies: 15μm≤D1≤40μm.

4. The supporting back plate according to claim 1, characterized in that, The plurality of the first grooves include at least one of the following: rectangular groove, elliptical groove, hourglass-shaped groove, dog bone-shaped groove, and waist-shaped groove.

5. The supporting back plate according to claim 1, characterized in that, The multiple first grooves have the same shape.

6. The supporting back plate according to claim 1, characterized in that, A plurality of first grooves are disposed in the first region and the third region, and the plurality of first grooves located in the first region and the plurality of first grooves located in the third region are symmetrically arranged along the extension line of the second direction.

7. The supporting backplate according to claim 1, characterized in that, In the first fiber layer, the first fibers are spaced apart along the first direction. The first fiber layer includes a third region and a fourth region arranged along the first direction. The arrangement density of the first fibers in the third region is greater than the arrangement density of the first fibers in the fourth region. The orthographic projection of the first groove on the first fiber layer is located in the fourth region.

8. The supporting back plate according to claim 1, characterized in that, The support back plate also includes a plurality of through slots disposed in the second region, the through slots extending along the second direction.

9. The supporting back plate according to claim 8, characterized in that, The through slots are arranged at intervals along the first direction; And / or, along the second direction, the through slots are spaced apart.

10. The supporting back plate according to claim 8, characterized in that, Along the first direction, the through slots are arranged at intervals, and two adjacent through slots are arranged in a staggered manner; And / or, along the second direction, the through slots are arranged at intervals, with adjacent through slots arranged in a staggered manner.

11. The support backplate according to any one of claims 8 to 10, characterized in that, In the first fiber layer, the first fibers are spaced apart along the first direction. The first fiber layer includes a third region and a fourth region arranged along the first direction. The arrangement density of the first fibers in the third region is greater than the arrangement density of the first fibers in the fourth region. At least a portion of the orthographic projection of the through groove onto the first fiber layer is located in the fourth region. And / or, in the third fiber layer, the third fibers are spaced apart along the first direction, the third fiber layer includes a fifth region and a sixth region arranged along the first direction, the arrangement density of the third fibers in the fifth region is greater than the arrangement density of the third fibers in the sixth region, and at least a portion of the orthographic projection of the through groove on the third fiber layer is located in the sixth region; And / or, in the second fiber layer, the second fibers are spaced apart along the second direction, the second fiber layer includes a first region and a second region arranged along the second direction, the arrangement density of the second fibers in the first region is greater than the arrangement density of the second fibers in the second region, and at least a portion of the orthographic projection of the through groove on the second fiber layer is located in the second region.

12. The supporting back plate according to claim 1, characterized in that, In the first fiber layer, the arrangement density of the first fiber located in the second region is less than the arrangement density of the first fiber located in the first region and / or the third region. And / or, in the third fiber layer, the arrangement density of the third fiber located in the second region is less than the arrangement density of the third fiber located in the first region and / or the third region.

13. A display module, characterized in that, It includes a display panel and a support back plate as described in any one of claims 1-12, wherein the support back plate is disposed on the backlight side of the display panel.

14. A display device, characterized in that, Includes the display module as described in claim 13.

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