Display module and display device

Abstract

The display module and the display device are disclosed in the embodiments of the present application. The display module disclosed in the embodiments of the present application comprises a back plate, a first adhesive layer, a support structure layer and a flexible display panel which are sequentially stacked. The side of the back plate facing the support structure layer is provided with a groove. The display module further comprises a tension maintaining assembly. The tension maintaining assembly is arranged at least in the groove. One end of the tension maintaining assembly is connected to the back plate, and the other end of the tension maintaining assembly is connected to the support structure layer. The tension maintaining assembly comprises an elastic member. The elastic member is in a stretched state. The flexible display panel is fixed on the support structure layer to form a curved module. The tension maintaining assembly is used to hold the curved module to improve the stability of the shape of the curved module.

Description

Technical Field

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

[0002] In related technologies, dome displays are displays that are curved in both horizontal and vertical directions to form a dome structure. To maintain the dome shape, a dome-shaped back panel is usually needed as a support for shaping, and the flexible display module is fixed to the curved back panel.

[0003] However, due to the springback stress of the dome-shaped flexible display module after bending, this springback stress will cause the display module to return to a flat state. The adhesive layer used to fix the flexible display module and the curved back panel is not strong enough to resist the springback stress of the flexible display module as the usage time increases. As a result, the flexible display module and the curved back panel separate, and the flexible display module tends to be flat. Summary of the Invention

[0004] This application provides a display module and display device that can reduce the risk of a curved display panel being restored to a flat display panel.

[0005] This application provides a display module that is curved along a first direction and a second direction, wherein the first direction intersects the second direction, and the display module includes:

[0006] The back panel is bent along the first and second directions;

[0007] A first adhesive layer is disposed on the back plate;

[0008] A supporting structural layer is disposed on the first adhesive layer; and

[0009] A flexible display panel is disposed on the supporting structure layer;

[0010] The back panel has a groove on the side facing the support structure layer; the display module also includes a tension maintaining component, which is at least disposed in the groove, with one end connected to the back panel and the other end connected to the support structure layer; the tension maintaining component includes an elastic element disposed in the groove, which is in a stretched state, causing the flexible display panel to bend along the first direction and the second direction.

[0011] In some embodiments of this application, the tension maintaining assembly further includes a connecting pad and a second adhesive layer. One end of the elastic member is connected to the side of the groove away from the support structure layer, and the other end of the elastic member is connected to the connecting pad. The connecting pad covers the groove and abuts against the outer periphery of the groove. The second adhesive layer is bonded between the connecting pad and the support structure layer.

[0012] In some embodiments of this application, a clearance groove is further provided on the side of the back plate facing the support structure layer. The clearance groove is connected to the groove, the groove wall is located on the outer periphery of the groove, and the connecting pad is located inside the clearance groove.

[0013] In some embodiments of this application, the elastic force of the elastic element is greater than the adhesion force between the first adhesive layer and the back plate, and the adhesion force between the second adhesive layer and the connecting pad is greater than the adhesion force between the first adhesive layer and the back plate.

[0014] In some embodiments of this application, the hardness of the elastic element is greater than the hardness of the first adhesive layer.

[0015] In some embodiments of this application, the first adhesive layer includes a plurality of adhesive portions, which are spaced apart on the side of the back plate near the support structure layer.

[0016] In some embodiments of this application, in a top view of the display module, the back panel has a major axis and a minor axis, the extension direction of the major axis intersects the extension direction of the minor axis at the center point of the back panel, the major axis and the minor axis intersect to form a first region, a second region, a third region and a fourth region, the first region and the fourth region are diagonally arranged, and the second region and the third region are diagonally arranged;

[0017] The number of tension maintaining components is multiple, and the tension maintaining components include a first tension maintaining component, a second tension maintaining component, a third tension maintaining component, and a fourth tension maintaining component. The first tension maintaining component is disposed in the first region, the second tension maintaining component is disposed in the second region, the third tension maintaining component is disposed in the third region, and the fourth tension maintaining component is disposed in the fourth region.

[0018] In any of the first to fourth regions, the connecting pad extends from the center region of the back plate toward the corner region.

[0019] In some embodiments of this application, in a top view of the display module, the connecting pad of the first tension maintaining component extends along a third direction, the connecting pad of the second tension maintaining component extends along a fourth direction, the connecting pad of the third tension maintaining component extends along a fifth direction, and the connecting pad of the fourth tension maintaining component extends along a sixth direction. The third to sixth directions intersect the extension directions of the major axis and the minor axis. The third direction intersects the sixth direction, and the fourth direction intersects the fifth direction. The patterns of the connecting pads in the first region and the second region are symmetrically arranged about the minor axis. The patterns of the connecting pads in the first region and the third region are symmetrically arranged about the major axis. The patterns of the connecting pads in the fourth region and the second region are symmetrically arranged about the major axis. The patterns of the connecting pads in the fourth region and the third region are symmetrically arranged about the minor axis.

[0020] In some embodiments of this application, in a top view of the display module, a plurality of adhesive portions are located at the long axis and extend along the extension direction of the long axis and are arranged in a specific arrangement; a plurality of adhesive portions are located at the short axis and extend along the extension direction of the short axis and are arranged in a specific arrangement; and a plurality of adhesive portions are located in the peripheral area of ​​the back plate and extend along the peripheral direction of the back plate and are arranged in a specific arrangement.

[0021] In some embodiments of this application, the support structure layer includes a metal layer, a third adhesive layer, an elastic buffer layer and a fourth adhesive layer stacked sequentially, the fourth adhesive layer being connected to the flexible display panel, and the metal layer being connected to the first adhesive layer and the second adhesive layer.

[0022] In some embodiments of this application, the thickness of the elastic buffer layer is less than or equal to 0.1 mm.

[0023] Accordingly, this application also provides a display device, which includes a middle frame, a back cover, and a display module as described in any of the above embodiments. The middle frame is disposed in the periphery of the back cover and forms a receiving cavity with the back cover, and the display module is disposed in the receiving cavity.

[0024] The display module of this application embodiment includes a back plate, a first adhesive layer, a support structure layer, and a flexible display panel stacked sequentially. A groove is provided on the side of the back plate facing the support structure layer. The display module also includes a tension-maintaining component, which is at least disposed within the groove. One end of the tension-maintaining component is connected to the back plate, and the other end is connected to the support structure layer. The tension-maintaining component includes an elastic element, which is in a stretched state. The flexible display panel is fixed to the support structure layer to form a curved module. In this application embodiment, the tension-maintaining component is used to hold the curved module in place to improve the stability of maintaining its shape. When the elastic force of the curved module is large and pulls the tension-maintaining component, the elastic element continues to be stretched, increasing its elastic force to resist the elastic force of the curved module. Furthermore, the tension-maintaining component remains attached to the support structure layer, reducing the risk of the curved module returning to a flat surface. Attached Figure Description

[0025] Figure 1 This is an exploded view of the display module provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the display module provided in the embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the metal layer of the display module provided in the embodiments of this application;

[0028] Figure 4 This is a top view of the back plate, the first adhesive layer, and the tension maintaining component in the display module provided in the embodiments of this application;

[0029] Figure 5 This is another structural schematic diagram of the display module provided in the embodiments of this application;

[0030] Figure 6 This is an exploded structural diagram of the display device provided in the embodiments of this application. Detailed Implementation

[0031] The technical solutions in 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 in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device; the terms "first," "second," "third," etc., are used only as indications and do not impose numerical requirements or establish a sequence.

[0032] This application provides a display module and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.

[0033] Please refer to Figure 1 and Figure 2 This application provides a display module 100, which is bent along a first direction x and a second direction y. The first direction x intersects the second direction y. The display module 100 includes a back plate 11, a first adhesive layer 12, a support structure layer 13, a flexible display panel 14, and a tension maintaining assembly 15.

[0034] The back panel 11 is bent along a first direction x and a second direction y. A first adhesive layer 12 is disposed on the back panel 11. A support structure layer 13 is disposed on the first adhesive layer 12. A flexible display panel 14 is disposed on the support structure layer 13.

[0035] The back panel 11 has a groove 11a on the side facing the support structure layer 13. The display module 100 also includes a tension maintaining component 15, which is at least disposed within the groove 11a. One end of the tension maintaining component 15 is connected to the back panel 11, and the other end is connected to the support structure layer 13. The tension maintaining component 15 includes an elastic element 151 disposed within the groove. When the elastic element 151 is in a stretched state, it causes the flexible display panel 14 to bend along the first direction x and the second direction y.

[0036] In this embodiment, the flexible display panel 14 is fixed on the support structure layer 13 to form a curved module. A tension-maintaining component 15 is used to hold the curved module in place to improve the stability of its shape. When the elastic force of the curved module is large and pulls the tension-maintaining component 15, the elastic element 151 continues to be stretched, increasing its elastic force to resist the elastic force of the curved module. Furthermore, the tension-maintaining component 15 remains attached to the support structure layer 13, reducing the risk of the curved module returning to a flat surface.

[0037] In addition, the groove 11a is used to accommodate the elastic element 151, so as to avoid the gap between the back plate 11 and the curved module being too large, thereby improving the stability of the connection.

[0038] Optionally, the groove 11a can be formed by stamping.

[0039] It should be explained that the display module 100 is a curved surface display module that is curved along the first direction x and the second direction y. Optionally, the first direction x is perpendicular to the second direction y, for example, the display module 100 can be dome-shaped or spherical cap-shaped.

[0040] Elastic force, also known as elasticity, is the force that allows an object to return to its original shape after being deformed by an external force and the force is removed. The direction of the elastic force is opposite to the direction of the external force that caused the deformation. For example, when an object is stretched or compressed, the distance between its internal molecules changes, causing an imbalance between the attractive and repulsive forces between the molecules, thus creating a tendency to return to its original shape—this is the elastic force. The magnitude of the elastic force is directly proportional to the amount of deformation of the object.

[0041] The elastic element 151 is in a stretched state, that is, the elastic element 151 is stretched and has a tightening elastic force. Optionally, the elastic element 151 includes, but is not limited to, a spring.

[0042] Optionally, in a single tension maintaining assembly 15, the number of elastic elements 151 can be one, two, or more, and can be set according to the actual situation. This application embodiment does not impose any restrictions.

[0043] In one embodiment of this application, the hardness of the elastic element 151 is greater than the hardness of the first adhesive layer 12.

[0044] Optionally, the flexible display panel 14 includes, but is not limited to, organic light-emitting diode panels, micro light-emitting diode panels, quantum dot light-emitting diode panels, and sub-millimeter-scale light-emitting diode panels.

[0045] Optionally, the dome curvature of the display surface of the flexible display panel 14 is less than 3.14 Rad (Rad is a unit of radians, and its formula is: arc length / radius).

[0046] Optionally, the back plate 11 is a curved back plate, and optionally, the back plate 11 is dome-shaped or spherical. The back plate 11 is formed of a rigid material, and it serves as a support for the curved module and also as a substrate for maintaining the shape of the curved module.

[0047] The back plate 11 has a higher hardness than the curved module in order to better maintain the shape of the curved module.

[0048] In one embodiment of this application, the first adhesive layer 12 includes a plurality of adhesive portions 121, which are spaced apart on the side of the back plate 11 near the support structure layer 13.

[0049] In contrast to adhesive layers that are applied to an entire strip or surface, the first adhesive layer 12 uses multiple adhesive portions 121 spaced apart to reduce the risk of wrinkles forming during bending, thereby reducing the risk of the curved module arching.

[0050] Optionally, the first adhesive layer 12 may include, but is not limited to, double-sided adhesive, pressure-sensitive adhesive, hot melt adhesive, or optical adhesive, such as double-sided foam adhesive.

[0051] In one embodiment of this application, the support structure layer 13 includes a metal layer 131, a third adhesive layer 132, an elastic buffer layer 133, and a fourth adhesive layer 134, which are sequentially stacked. The fourth adhesive layer 134 is connected to the flexible display panel 14, and the metal layer 131 is connected to the first adhesive layer 12 and the tension maintaining component 15. The metal layer 131 is connected to the second adhesive layer 153 of the tension maintaining component 15.

[0052] The elastic buffer layer 133 is used to balance the wrinkle stress of the flexible display panel 14 and reduce the risk of wrinkles in the flexible display panel 14. That is, during the bending process, the low elastic modulus of the elastic buffer layer 133 is used to balance the wrinkle stress of the flexible display panel 14, thereby reducing the risk of wrinkles.

[0053] Optionally, the elastic buffer layer 133 has high elasticity and strong shrinkage. The material of the elastic buffer layer 133 can be rubber resin.

[0054] Optionally, the thickness of the elastic buffer layer 133 is less than or equal to 0.1 mm.

[0055] Understandably, if the elastic buffer layer 133 is too thick, wrinkles are likely to form during bending, causing the film layers to separate. Therefore, in order to further reduce the risk of wrinkles, the thickness of the elastic buffer layer 133 is set to be less than or equal to 0.1 mm, such as 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm, 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, or 0.01 mm.

[0056] Optionally, the materials of the third adhesive layer 132 and the fourth adhesive layer 134 can be optical adhesive or pressure-sensitive adhesive.

[0057] Please refer to Figure 3 In one embodiment of this application, a plurality of openings 13a are formed on the metal layer 131. (Top view of the metal layer 131 in a flat state) Figure 3 In the ), multiple openings 13a are arranged at intervals to form multiple circular patterns, and the center of each of the multiple circular patterns is the center k of the metal layer 131.

[0058] Optionally, the arc length between openings 13a increases from the center of metal layer 131 towards its edge. This arrangement improves the uniformity of stress release.

[0059] Optionally, the number of openings 13a in two adjacent annular patterns is the same.

[0060] Optionally, in a top view where the metal layer 131 is in a flat state, the metal layer 131 has a long side and a short side, which are connected sequentially to form a rectangle. The metal layer 131 has a first central axis zc1 parallel to the long side and a second central axis zc2 parallel to the short side, and the first central axis zc1 and the second central axis zc2 intersect perpendicularly at the center k. The first central axis zc1 is aligned with the first direction x, and the second central axis zc2 is aligned with the second direction y.

[0061] The openings 13a are spaced apart at the first central axis zc1 and the second central axis zc2. The distance between the nearest openings 13a on both sides of the first central axis zc1 is the first distance d1, the distance between the nearest openings 13a on both sides of the second central axis zc2 is the second distance d2, and the distance between the openings 13a in the area between the first central axis zc1 and the second central axis zc2 is the third distance d3. In any annular pattern, the first distance d1 and the second distance d2 are both greater than the third distance d3 to ensure the support of the metal layer 131 for the flexible display panel 14.

[0062] Optionally, the material of the metal layer 131 includes, but is not limited to, at least one of iron, nickel, manganese, titanium, copper, zinc, chromium, and aluminum. The metal layer 131 can undergo plastic deformation under stress and maintain its deformed shape after the external force is removed, thereby adjusting the shape and structure of the flexible display panel 14.

[0063] Optionally, the material forming the metal layer 131 includes a shape memory material. Exemplarily, the metal layer 131 is formed from a shape memory material and is configured to have a planar structure. The user can bend the metal layer 131 to create a 3D curved surface structure and maintain the shape of the curved surface structure.

[0064] Shape memory materials can be shape memory alloys, such as nickel-titanium alloys, titanium-nickel-copper alloys, titanium-nickel-chromium alloys, titanium-nickel-iron alloys, copper-nickel alloys, copper-aluminum alloys, copper-zinc alloys, etc.

[0065] In one embodiment of this application, the tension maintaining assembly 15 further includes a connecting pad 152 and a second adhesive layer 153. One end of the elastic member 151 is connected to the side of the groove 11a away from the support structure layer 13, and the other end of the elastic member 151 is connected to the connecting pad 152. The connecting pad 152 covers the groove 11a and abuts against the outer periphery of the groove 11a, and the second adhesive layer 153 is bonded between the connecting pad 152 and the support structure layer 13.

[0066] In this process, the connecting pad 152 is bonded to the support structure layer 13 through the second adhesive layer 153, thereby increasing the connection area between the tension maintaining component 15 and the support structure layer 13, which in turn increases the connection area between the tension maintaining component 15 and the curved module, thereby improving the stability of the curved shape of the curved module.

[0067] In addition, the connecting pad 152 is subjected to the elastic force of the elastic member 151, which causes the connecting pad 152 to abut against the back plate 11 on the outer periphery of the groove 11a, so that the tension maintaining component 15 always has tension to hold the curved module, thereby improving the stability of the curved shape of the flexible display panel in the curved module.

[0068] Optionally, the connecting pad 152 is aligned with the surface of the curved module facing the flexible display panel, so that the connecting pad 152 can fully conform to the curved module, thereby improving the stability of the connection.

[0069] In one embodiment of this application, the elastic force of the elastic element 151 is greater than the adhesive force between the first adhesive layer 12 and the back plate 11. The adhesive force between the second adhesive layer 153 and the connecting pad 152 is greater than the adhesive force between the first adhesive layer 12 and the back plate 11. The above-described arrangement improves the firmness of the connection between the tension maintaining assembly 15 and the back plate 11, thereby reducing the risk of the curved module detaching from the back plate 11 and / or the first adhesive layer 12.

[0070] Optionally, the bonding force of the support structure layer 13 and the second adhesive layer 153 is greater than the bonding force of the support structure layer 13 and the first adhesive layer 12, so as to improve the firmness of the connection between the connecting pad 152 and the curved module, thereby improving the stability of the curved shape of the flexible display panel.

[0071] It should be explained that at the interface between the adhesive and the object being bonded, the adhesive force refers to the intermolecular force, which is the result of the interaction between the adhesive and the object being bonded, and is used to tightly bond the two together.

[0072] Please refer to Figure 4In one embodiment of this application, in a top view of the display module 100, the back panel 11 has a major axis 1a and a minor axis 1b, the extension direction of the major axis 1a intersects the extension direction of the minor axis 1b at the center point Q of the back panel 11. The major axis 1a and the minor axis 1b intersect to form a first region z1, a second region z2, a third region z3, and a fourth region z4, the first region z1 and the fourth region z4 being diagonally arranged, and the second region z2 and the third region z3 being diagonally arranged.

[0073] There are multiple tension maintaining components 15. The tension maintaining components 15 include a first tension maintaining component 15a, a second tension maintaining component 15b, a third tension maintaining component 15c, and a fourth tension maintaining component 15d. The first tension maintaining component 15a is disposed in a first region z1, the second tension maintaining component 15b is disposed in a second region z2, the third tension maintaining component 15c is disposed in a third region z3, and the fourth tension maintaining component 15d is disposed in a fourth region z4.

[0074] In any of the regions from the first region z1 to the fourth region z4, the connecting pad 152 extends from the center region of the back plate 11 to the corner region.

[0075] Optionally, the extension direction of the major axis 1a is consistent with the direction of the first direction x, and the extension direction of the minor axis 1b is consistent with the direction of the second direction y.

[0076] Among them, the tension maintaining component 15 is distributed in the first region z1 to the fourth region z4, which improves the uniformity of the tension maintaining component 15 in maintaining the shape of the curved module, thereby better maintaining the shape of the curved module.

[0077] Optionally, in the top view of the display module 100, the connecting pad 152 of the first tension maintaining component 15a extends along a third direction m, the connecting pad 152 of the second tension maintaining component 15b extends along a fourth direction n, the connecting pad 152 of the third tension maintaining component 15c extends along a fifth direction s, and the connecting pad 152 of the fourth tension maintaining component 15d extends along a sixth direction g. The third direction m to the sixth direction g all intersect the extension direction of the major axis 1a and the extension direction of the minor axis 1b. The third direction m intersects the sixth direction g, and the fourth direction n intersects the fifth direction s.

[0078] The pattern of the connecting pad 152 located in the first region z1 is symmetrical to the pattern of the connecting pad 152 located in the second region z2 about the minor axis 1b. The pattern of the connecting pad 152 located in the first region z1 is symmetrical to the pattern of the connecting pad 152 located in the third region z3 about the major axis 1a. The pattern of the connecting pad 152 located in the fourth region z4 is symmetrical to the pattern of the connecting pad 152 located in the second region z2 about the major axis 1a. The pattern of the connecting pad 152 located in the fourth region z4 is symmetrical to the pattern of the connecting pad 152 located in the third region z3 about the minor axis 1b.

[0079] Specifically, the patterns of the connecting pads 152 in two adjacent regions are symmetrically arranged, and the patterns of the connecting pads 152 in two diagonal regions are symmetrically arranged about the center point Q, so that the connecting pads 152 uniformly connect the curved surface module, thereby maintaining the curved surface shape of the curved surface module in a balanced manner.

[0080] It should be noted that the number of grooves 11a is the same as the number of tension maintaining components 15, and the two are set in a one-to-one correspondence.

[0081] In one embodiment of this application, in a top view of the display module 100, a plurality of adhesive portions 121 are located at the major axis 1a and extend along the extension direction of the major axis 1a and are arranged in a plurality of adhesive portions 121 are located at the minor axis 1b and extend along the extension direction of the minor axis 1b and are arranged in a plurality of adhesive portions 121 are located in the peripheral area of ​​the back plate 11 and extend along the peripheral direction of the back plate 11 and are arranged in a plurality of adhesive portions 121.

[0082] The adhesive layer 121 is arranged along the long axis 1a, the short axis 1b and the periphery of the back plate 11, and the second adhesive layer 153 is arranged along the diagonal direction of the four regions (z1 to z4), so that the first adhesive layer 12 and the second adhesive layer 153 are more evenly connected to the curved module, which improves the stability and balance of maintaining the curved shape of the curved module as a whole.

[0083] The space between the adhesive layer 121 and the second adhesive layer 153 can be used to release the bending stress and wrinkle stress of the curved module, reducing the risk of wrinkles and breakage of the flexible display panel 14.

[0084] Please refer to Figure 5 In some embodiments of this application, the difference from the above embodiments is that a clearance groove 11b is also provided on the side of the back plate 11 facing the support structure layer 13. The clearance groove 11b is connected to the groove 11a. The groove wall of the clearance groove 11b is located on the outer periphery of the groove 11a, and the connecting pad 152 is located in the clearance groove 11b.

[0085] The setting of the clearance groove 11b further reduces the distance between the back plate 11 and the curved module, thins the display module 100, and also improves the effect of the back plate 11 in maintaining the shape of the curved module.

[0086] Optionally, the surface of the connecting pad 152 away from the elastic element 151 is coplanar with the surface of the back plate 11 where the first adhesive layer 12 is provided. The thickness of the first adhesive layer 12 is equal to the thickness of the second adhesive layer 153.

[0087] Please refer to Figure 6 Accordingly, this application also provides a display device 1000, which includes a middle frame 200, a back cover 300, and a display module 100 as described in any of the above embodiments. The middle frame 200 is disposed in the periphery region of the back cover 300 and forms a receiving cavity with the back cover 300. The display module 100 is disposed within the receiving cavity.

[0088] The flexible display panel 14 is fixed on the support structure layer 13 to form a curved module Qm.

[0089] Optionally, the display device 1000 can be at least one of the following: smartphone, tablet computer, mobile phone, video phone, e-book reader, desktop PC, laptop PC, netbook computer, workstation, server, personal digital assistant, portable multimedia player, MP3 player, television, mobile medical device, camera, game console, digital camera, car navigation system, electronic billboard, ATM, or wearable device, VR device, AR device.

[0090] Optionally, this embodiment uses a desktop monitor as an example to illustrate the concept of display device 1000.

[0091] The display device 1000 also includes a decorative strip 400, a base 500, and a fixing component 600. The decorative strip 400 is used to cover the circuit board on the lower side of the curved module and to maintain the shape of the lower side of the curved module, preventing the lower side of the screen from lifting up.

[0092] Decorative strip 400 is provided on back panel 11 and covers curved module connected to circuit board. Base 500 is fixedly connected to back cover 300 by fixing component 600.

[0093] It should be noted that the structure of the display module 100 of the display device 1000 in this application embodiment is similar to or the same as the structure of the display module 100 in any of the above embodiments. Please refer to [link / reference] for details. Figures 1 to 5 The corresponding explanations will not be repeated here.

[0094] The display module of the display device in this embodiment includes a back plate, a first adhesive layer, a support structure layer, and a flexible display panel stacked sequentially. A groove is provided on the side of the back plate facing the support structure layer. The display module also includes a tension-maintaining component, which is at least disposed within the groove. One end of the tension-maintaining component is connected to the back plate, and the other end is connected to the support structure layer. The tension-maintaining component includes an elastic element, which is in a stretched state. The flexible display panel is fixed to the support structure layer to form a curved module. In this embodiment, the tension-maintaining component holds the curved module in place to improve the stability of its shape. When the elastic force of the curved module is large and pulls the tension-maintaining component, the elastic element continues to be stretched, increasing its elastic force to resist the elastic force of the curved module. The connecting pad remains in contact with the support structure layer, reducing the risk of the curved module returning to a flat surface.

[0095] The above provides a detailed description of a display module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display module, bent along a first direction and a second direction, wherein the first direction intersects the second direction, characterized in that, The display module includes: The back panel is bent along the first and second directions; A first adhesive layer is disposed on the back plate; A supporting structural layer is disposed on the first adhesive layer; and A flexible display panel is disposed on the supporting structure layer; The back panel has a groove on the side facing the support structure layer; the display module also includes a tension maintaining component, which is at least disposed in the groove, with one end connected to the back panel and the other end connected to the support structure layer; the tension maintaining component includes an elastic element disposed in the groove, which is in a stretched state, causing the flexible display panel to bend along the first direction and the second direction.

2. The display module according to claim 1, characterized in that, The tension maintaining assembly further includes a connecting pad and a second adhesive layer. One end of the elastic element is connected to the side of the groove away from the support structure layer, and the other end of the elastic element is connected to the connecting pad. The connecting pad covers the groove and abuts against the outer periphery of the groove. The second adhesive layer is bonded between the connecting pad and the support structure layer.

3. The display module according to claim 2, characterized in that, The back plate is also provided with a clearance groove on the side facing the supporting structure layer. The clearance groove is connected to the groove, the groove wall is located on the outer periphery of the groove, and the connecting pad is located inside the clearance groove.

4. The display module according to claim 2, characterized in that, The elastic force of the elastic element is greater than the adhesion force between the first adhesive layer and the back plate, and the adhesion force between the second adhesive layer and the connecting pad is greater than the adhesion force between the first adhesive layer and the back plate.

5. The display module according to claim 2, characterized in that, The first adhesive layer includes a plurality of adhesive portions, which are spaced apart on the side of the back plate near the support structure layer.

6. The display module according to claim 5, characterized in that, In the top view of the display module, the back panel has a major axis and a minor axis. The extension direction of the major axis intersects the extension direction of the minor axis at the center point of the back panel. The major axis and the minor axis intersect to form a first region, a second region, a third region, and a fourth region. The first region and the fourth region are diagonally arranged, and the second region and the third region are diagonally arranged. The number of tension maintaining components is multiple, and the tension maintaining components include a first tension maintaining component, a second tension maintaining component, a third tension maintaining component, and a fourth tension maintaining component. The first tension maintaining component is disposed in the first region, the second tension maintaining component is disposed in the second region, the third tension maintaining component is disposed in the third region, and the fourth tension maintaining component is disposed in the fourth region. In any of the first to fourth regions, the connecting pad extends from the center region of the back plate toward the corner region.

7. The display module according to claim 6, characterized in that, In the top view of the display module, the connecting pad of the first tension maintaining component extends along a third direction, the connecting pad of the second tension maintaining component extends along a fourth direction, the connecting pad of the third tension maintaining component extends along a fifth direction, and the connecting pad of the fourth tension maintaining component extends along a sixth direction. The third to sixth directions intersect the extension directions of the major axis and the minor axis. The third direction intersects the sixth direction, and the fourth direction intersects the fifth direction. The patterns of the connecting pads in the first region and the second region are symmetrically arranged about the minor axis. The patterns of the connecting pads in the first region and the third region are symmetrically arranged about the major axis. The patterns of the connecting pads in the fourth region and the second region are symmetrically arranged about the major axis. The patterns of the connecting pads in the fourth region and the third region are symmetrically arranged about the minor axis.

8. The display module according to claim 6, characterized in that, In the top view of the display module, a plurality of adhesive portions are located at the long axis and extend along the extension direction of the long axis and are arranged in a specific arrangement; a plurality of adhesive portions are located at the short axis and extend along the extension direction of the short axis and are arranged in a specific arrangement; and a plurality of adhesive portions are located in the peripheral area of ​​the back plate and extend along the peripheral direction of the back plate and are arranged in a specific arrangement.

9. The display module according to any one of claims 2-8, characterized in that, The supporting structure layer includes a metal layer, a third adhesive layer, an elastic buffer layer and a fourth adhesive layer stacked in sequence. The fourth adhesive layer is connected to the flexible display panel, and the metal layer is connected to the first adhesive layer and the second adhesive layer.

10. The display module according to claim 9, characterized in that, The thickness of the elastic buffer layer is less than or equal to 0.1 mm.

11. A display device, characterized in that, The device includes a mid-frame, a back cover, and a display module as described in any one of claims 1-10, wherein the mid-frame is disposed in the periphery of the back cover and forms a receiving cavity with the back cover, and the display module is disposed within the receiving cavity.

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