Supporting piece, flexible display screen and foldable electronic equipment

Abstract

The invention provides a supporting piece, a flexible display screen and foldable electronic equipment. The supporting piece comprises a first supporting layer and a second supporting layer which are arranged in a stacked mode. The first supporting layer comprises a bending area and a non-bending area, the first supporting layer is provided with a first surface and a second surface which are oppositely arranged in the thickness direction of the supporting piece, the first surface forms at least part of the supporting surface of the supporting piece, and the first supporting layer is provided with a groove; the groove is recessed from one surface of the first surface and the second surface to the other surface, at least part of the groove is located in the bending area, the portion, located at the bottom of the groove, of the first supporting layer is a groove bottom wall, at least part of the second supporting layer is arranged in the groove in the thickness direction of the second supporting layer, and the second supporting layer and the groove bottom wall are arranged in a stacked mode. And the second supporting layer covers at least partial area of the bending area of the first supporting layer. The supporting piece can meet the requirements of lightening and thinning on the basis of meeting the reliability of the flexible display screen, so that the effect of reducing the weight and the thickness of the foldable electronic equipment is achieved.

Description

Technical Field

[0001] The present application relates to the field of flexible display screens, and in particular to a support member, a flexible display screen and a foldable electronic device. Background Art

[0002] A foldable electronic device generally includes a shell assembly and a flexible display screen. The shell assembly is used to support the flexible display screen, and includes a first middle frame, a second middle frame and a hinge mechanism. The first middle frame and the second middle frame are rotatably connected via the hinge mechanism. The flexible display screen generally includes a stacked functional layer and a support member. The portion of the functional layer and the support member stacked with the hinge mechanism is a bending zone of each layer. The bending zone bends and flattens as the foldable electronic device is opened and folded. When the flexible display screen is bent or unfolded, the bending zones of the functional layer and the support member are bent and unfolded synchronously. Among them, the support member must not only play the role of supporting the functional layer, but also have good bending and stretching properties, so that it can bend and flatten synchronously with the functional layer, and provide a stable and reliable supporting force for the functional layer during the bending and flattening process.

[0003] In order to meet the above requirements, the prior art is to stagger a plurality of holes (also called bamboo book structures) in the bending zone of the support member to improve the bending and stretching properties of the bending zone of the support member. However, due to the uneven surface of the hinge mechanism, some hole-like structures are easily formed between it and the support member. In addition, the holes inside the support member reduce the anti-extrusion and anti-collision capabilities of the flexible display screen. In order to improve the anti-extrusion and anti-collision capabilities of the flexible display screen, the prior art is to add a layered support structure made of harder materials such as stainless steel to the original structure of the support member to improve the overall reliability of the support member. However, since the density of these materials is usually large, the addition of a layered support structure will not only increase the thickness of the flexible display screen, but also increase the weight of the flexible display screen, which is not conducive to the thinness of the terminal product.

[0004] Therefore, it is difficult for the flexible display screen of the foldable electronic device in the prior art to be lightweight while ensuring structural reliability, which in turn affects the lightweightness of the entire device and provides a poor user experience. Summary of the invention

[0005] The support member, flexible display screen and foldable electronic device provided in the embodiments of the present application solve the problem in the prior art that the flexible display screen of the foldable electronic device is difficult to make thin and light while ensuring structural reliability, which in turn affects the thinness of the entire device and results in a poor user experience.

[0006] The embodiment of the present application provides a support member for a flexible display screen, comprising a first support layer and a second support layer stacked in layers. The first support layer comprises a bending region and a non-bending region connected to the bending region.

[0007] The first supporting layer has a first surface and a second surface which are arranged opposite to each other in the thickness direction of the supporting member, the first surface constitutes at least a part of the supporting surface of the supporting member, the first supporting layer is provided with a groove, the groove is recessed from one of the first surface and the second surface toward the other surface, at least a part of the groove is located in the bending zone, and the part of the first supporting layer located at the bottom of the groove is the groove bottom wall.

[0008] Furthermore, at least a portion of the second supporting layer along its thickness direction is disposed in the groove and is stacked with the groove bottom wall, and the second supporting layer covers at least a portion of the bending area of ​​the first supporting layer.

[0009] By adopting the above technical solution, the support member is divided into a first support layer and a second support layer. The first support layer is mainly used to realize the bending and stretching performance of the support member. The second support layer has a large rigidity and is not easily deformed after being impacted, thereby improving the support capacity of the support member. In addition, the second support layer covers at least part of the bending area of ​​the first support layer. When a hole is provided in the bending area of ​​the first support layer, the second support layer can reduce the influence of the hole on the overall structure of the support member, thereby improving the anti-extrusion and anti-collision capabilities of the support member, preventing the functional layer from being dented or deformed after being impacted or collided, thereby structurally strengthening the support member's support capacity for the functional layer and ensuring the reliability of the flexible display screen.

[0010] Furthermore, the second support layer is arranged in the groove of the first support layer, that is, an embedded design is adopted, and the second support layer is embedded inside the first support layer, which reduces the space occupied by the second support layer in the thickness direction of the support member, thereby avoiding the thickness increase of the flexible display screen. In addition, the groove is formed by the surface of one side of the first support layer being recessed inward, which means that in a plane perpendicular to the thickness direction of the first support layer, the size of the groove is smaller than the size of the surface of the first support layer, and the size of the second support layer is also smaller than the size of the first support layer. Or it can be understood that the second support layer does not need to cover the entire area of ​​the first support layer, but only needs to ensure that it can cover a part of the bending area of ​​the first support layer. And due to the embedded design, the surfaces of the first support layer and the second support layer can be connected flatly to stably support the functional layer. This allows the second support layer to be smaller in size, the overall weight of the support member is reduced, and the weight of the flexible display screen is also lighter.

[0011] Therefore, the support member provided in the embodiment of the present application can make the flexible display screen lighter and thinner while ensuring the structural reliability of the flexible display screen, thereby realizing a lighter and thinner design of the entire foldable electronic device and improving the user experience.

[0012] In some embodiments, the area in which the groove is provided in the first supporting layer is a recessed area, and the other areas in the first supporting layer except the recessed area are non-recessed areas. Among them, the entire area of ​​the bending zone is a recessed area, the entire area of ​​the non-bending zone is a non-recessed area, and the second supporting layer covers the entire area of ​​the bending zone. The second supporting layer only covers the bending zone of the first supporting layer, but not the non-bending zone of the first supporting layer, and the size of the second supporting layer is reduced to the maximum extent on the basis of ensuring the supporting capacity of the supporting member, thereby reducing the weight of the supporting member to the maximum extent. In some embodiments, the entire area of ​​the bending zone and a part of the non-bending zone are recessed areas, another part of the non-bending zone is a non-recessed area, and the second supporting layer covers a part of the non-bending zone of the entire area of ​​the bending zone. This has low requirements on the dimensional accuracy of the second supporting layer, which is convenient for processing and manufacturing.

[0013] In some embodiments, in the bending area, the first support layer is provided with a plurality of holes arranged at intervals, and each of the plurality of holes is a through hole or a blind hole. With this structure, the bending area of ​​the first support layer is easy to bend, and no creases or deformations are generated after multiple bendings, so that the support member can bend synchronously with the functional layer and provide a stable and reliable support force for the functional layer.

[0014] In some embodiments, the groove and the orthographic projection of the second supporting layer on the first plane coincide, wherein the first plane is perpendicular to the thickness direction of the supporting member. The second supporting layer completely matches the groove of the first supporting layer, and no gap that affects the supporting capacity of the supporting member is generated after the first supporting layer and the second supporting layer are assembled.

[0015] In some embodiments, the groove is recessed from the first surface of the first support layer toward the second surface, the second support layer is entirely disposed in the groove along its thickness direction, and the surface of the second support layer facing away from the bottom wall of the groove and the first surface of the first support layer are located on the same plane and together constitute the entire support surface of the support member.

[0016] With the above solution, the second support layer is arranged between the groove bottom wall of the first support layer and the functional layer. When the functional layer is hit or impacted, the second support layer can prevent the functional layer from sinking or deforming toward the hole on the first support layer and the hole, gap, etc. on the rotating shaft mechanism. The surface of the second support layer away from the groove bottom wall and the first surface of the first support layer are located in the same plane, and together constitute the support surface of the support member, so that the functional layer is flat and the display effect is good.

[0017] In some embodiments, the groove is sunken from the second surface of the first supporting layer toward the first surface, and the first surface of the first supporting layer constitutes the entire supporting surface of the supporting member, wherein a portion of the second supporting layer along its thickness direction is disposed in the groove, or the entire second supporting layer along its thickness direction is disposed in the groove, and a surface of the second supporting layer away from the groove bottom wall and the second surface of the first supporting layer are located on the same plane or on different planes.

[0018] By adopting the above technical solution, grooves of different depths can be designed in combination with the needs of the flexible display screen. When the surface of the second supporting layer away from the bottom wall of the groove is located on the side of the second surface of the first supporting layer facing the first surface, the depth of the groove is relatively large. The greater the depth of the groove, the lighter the weight of the first supporting layer. When the surface of the second supporting layer away from the bottom wall of the groove is located in the same plane as the second surface of the first supporting layer, there is no need to design a middle frame of unequal thickness to ensure the flatness of the functional layer, and the structure is relatively simple. When the surface of the second supporting layer away from the bottom wall of the groove is located on the side of the second surface of the first supporting layer away from the first surface, the depth of the groove is relatively small. The smaller the depth of the groove, the greater the thickness of the bottom wall of the groove of the first supporting layer, and the better the support capacity for the functional layer.

[0019] In some embodiments, the second support layer is fixed to the bottom wall of the groove by a glue layer. The first support layer and the second support layer are connected by the glue layer, and the bonding force between the first support layer and the second support layer is strong. In addition, the thickness of the glue layer is thin and the weight is light, which is conducive to realizing the thinness of the support member.

[0020] In some embodiments, the density of the second support layer is greater than the density of the first support layer, and the modulus of the second support layer is greater than the modulus of the first support layer. Since the volume of the first support layer is much larger than the volume of the second support layer, the lower density of the first support layer is conducive to achieving lightweight support. The higher modulus of the second support layer enables the support to have sufficient structural strength.

[0021] In some embodiments, the material of the first supporting layer is carbon fiber material or titanium alloy, and the material of the second supporting layer is stainless steel.

[0022] In some embodiments, the thickness of the second support layer is 1 / 10 to 1 / 5 of the thickness of the non-depressed area of ​​the first support layer. The second support layer has high rigidity and is more difficult to bend than the first support layer. The small thickness of the second support layer is conducive to bending. In addition, the small thickness of the second support layer is conducive to achieving lightweight support.

[0023] The present application also provides a flexible display screen, including a functional layer and a support member provided in any of the above embodiments. The support member and the functional layer are stacked, and the support surface of the support member supports the functional layer. The flexible display screen provided in the embodiment of the present application can be made thin and light while ensuring reliability, and has a good display effect.

[0024] The embodiment of the present application also provides a foldable electronic device, including a housing assembly and a flexible display screen provided by any of the above embodiments, wherein the flexible display screen is laid on the housing assembly through a support member. The foldable electronic device provided by the embodiment of the present application can be made thin and light, and the user experience is good.

[0025] In some embodiments, the shell assembly includes a first middle frame, a second middle frame and a hinge mechanism, the first middle frame and the second middle frame are rotatably connected by the hinge mechanism, the flexible display screen includes a first part, a foldable part and a second part connected in sequence, the first part of the flexible display screen is fixedly connected to the first middle frame, the second part is fixedly connected to the second middle frame, and the foldable part and the hinge mechanism are at least partially stacked.

[0026] Among them, in the support member of the flexible display screen, the non-bending area of ​​the first supporting layer includes a first non-bending area connected to one side of the bending area, and a second non-bending area connected to the other side of the bending area, the first part of the flexible display screen includes the first non-bending area, the foldable part includes the bending area, and the second part includes the second non-bending area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1a is a schematic diagram of a cross-sectional structure of a first foldable electronic device;

[0028] Figure 1b A schematic diagram of the cross-sectional structure of a flexible display screen of a first foldable electronic device;

[0029] Figure 2a is a schematic diagram of a cross-sectional structure of a second foldable electronic device;

[0030] Figure 2b is a schematic diagram of a cross-sectional structure of a flexible display screen of a second foldable electronic device;

[0031] Figure 3 This is a schematic diagram of the exploded structure of a foldable electronic device according to an embodiment of the present application;

[0032] Figure 4a This is a schematic diagram of the structure of a foldable electronic device in an unfolded state according to an embodiment of the present application;

[0033] Figure 4b This is a schematic diagram of the structure of a foldable electronic device in a closed state according to an embodiment of the present application;

[0034] Figure 4c This is a schematic diagram of the structure of the foldable electronic device according to an embodiment of the present application when it is unfolded at a certain angle;

[0035] Figure 5a This is a schematic cross-sectional structure diagram of a first implementation of a foldable electronic device according to an embodiment of the present application;

[0036] Figure 5b to Figure 5c This is a schematic diagram of the principle structure of the first implementation mode of the support member of the embodiment of the present application;

[0037] Figure 5d This is a schematic cross-sectional structure diagram of a first implementation mode of the flexible display screen of an embodiment of the present application;

[0038] Figure 6a This is a schematic diagram of the principle structure of the second implementation mode of the support member of the embodiment of the present application;

[0039] Figure 6b This is a schematic cross-sectional structure diagram of a second implementation mode of the flexible display screen of the present application embodiment;

[0040] Figure 6c This is a schematic cross-sectional structure diagram of a second embodiment of a foldable electronic device according to an embodiment of the present application;

[0041] Figure 7a to Figure 7b This is a schematic diagram of the principle structure of a third implementation mode of the support member of the embodiment of the present application;

[0042] Figure 7c This is a schematic cross-sectional structure diagram of a third implementation mode of the flexible display screen of the present application embodiment;

[0043] Figure 7d It is a schematic cross-sectional structure diagram of a third implementation mode of the foldable electronic device according to an embodiment of the present application;

[0044] Figure 8 This is a schematic cross-sectional structure diagram of a fourth implementation mode of the flexible display screen of the present application embodiment;

[0045] Fig. 9 This is a schematic cross-sectional structure diagram of a fifth implementation of the flexible display screen of the present application embodiment;

[0046] Fig.10a This is a schematic diagram of the principle structure of the fourth implementation mode of the support member of the embodiment of the present application;

[0047] Fig.10b This is a schematic cross-sectional structure diagram of a sixth implementation mode of the flexible display screen according to an embodiment of the present application;

[0048] Fig.11 This is a schematic cross-sectional structure diagram of a seventh implementation mode of the flexible display screen according to an embodiment of the present application;

[0049] Fig.12 This is a schematic cross-sectional structure diagram of an eighth implementation of the flexible display screen according to an embodiment of the present application.

[0050] Description of reference numerals:

[0051] The first option:

[0052] 100', foldable electronic devices;

[0053] 2', flexible display screen; 21', protective film; 22', cover plate; 23', functional layer;

[0054] 241', adhesive layer; 242', adhesive layer;

[0055] 25', support member; 251', hole;

[0056] W', bending zone;

[0057] 26', stainless steel sheet;

[0058] 3', housing assembly; 31', first middle frame; 32', second middle frame;

[0059] 33', rotating shaft mechanism; 331', hole structure;

[0060] F1', first direction; F2', second direction.

[0061] Second option:

[0062] 100”, foldable electronic devices;

[0063] 2”, flexible display screen; 21”, protective film; 22”, cover plate; 23”, functional layer;

[0064] 241”, glue layer; 242”, glue layer;

[0065] 25", support; 251", hole;

[0066] W”, bending area;

[0067] 26”, stainless steel sheet; 3”, shell assembly;

[0068] 31”, first middle frame; 32”, second middle frame;

[0069] 33”, shaft mechanism; 331”, hole structure;

[0070] F1”, first direction; F2”, second direction.

[0071] This application:

[0072] 100. Foldable electronic devices;

[0073] 2. Flexible display screen; 201. first part; 202. second part; 203. foldable part;

[0074] 21. Protective film; 22. Cover plate; 23. Functional layer;

[0075] 241, glue layer; 242, glue layer;

[0076] 25. support member; 25a. support surface;

[0077] 251, first supporting layer; 251a, first surface; 251b, second surface;

[0078] 2511, groove; 2512, groove bottom wall; 2513, hole;

[0079] O, sunken area; P, non-sunken area;

[0080] W, bending zone;

[0081] R, non-bending zone; R1, first non-bending zone; R2, second non-bending zone;

[0082] M, first plane;

[0083] 252, second supporting layer; 252a, first surface; 252b, second surface;

[0084] 3. Shell assembly; 31. First middle frame; 32. Second middle frame;

[0085] 33. Rotating shaft mechanism; 331. Hole structure;

[0086] F1, first direction; F2, second direction. DETAILED DESCRIPTION

[0087] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0088] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0089] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0090] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0091] In the description of the present application, it should be noted that the mutual perpendicularity in the present application is not absolute perpendicularity, and the approximate perpendicularity due to processing errors and assembly errors (for example, the angle between the two structural features is 89.9°) is also within the scope of mutual perpendicularity in the present application. The mutual parallelism in the present application is not absolute parallelism, and the approximate parallelism due to processing errors and assembly errors (for example, the angle between the two structural features is 0.1°) is also within the scope of mutual parallelism in the present application. The overlap in the present application is not absolute overlap, and the approximate overlap due to processing errors and assembly errors is also within the scope of mutual parallelism in the present application. The present application does not make specific limitations on this.

[0092] In order to make the objectives, technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0093] A foldable electronic device generally includes a shell component and a flexible display screen. The shell component is used to support the flexible display screen. The flexible display screen includes a stacked functional layer and a support member. When the flexible display screen is bent, the functional layer and the support member are bent synchronously. Among them, the support member should not only play the role of supporting the functional layer, so that the functional layer has a certain rigidity, and ensure that the functional layer does not sag or deform, so that the display effect of the flexible display screen is stable and flat, but also have good bending performance, so that it can bend synchronously with the functional layer, and provide a stable and reliable support force for the functional layer during the bending process. However, the thickness and weight of the support member in the prior art make it difficult for the flexible display screen of the foldable electronic device to be thin and light while ensuring the reliability of the structure, which affects the user experience.

[0094] See also Figure 1a to Figure 1b , Figure 1a is a schematic diagram of a cross-sectional structure of a first foldable electronic device; Figure 1b Schematic diagram of the cross-sectional structure of the first flexible display screen of a foldable electronic device.

[0095] like Figure 1a to Figure 1b As shown, for ease of understanding, the first direction F1' and the second direction F2' are shown in the figure, and the first direction F1' and the second direction F2' are perpendicular to each other. Among them, the first direction F1' can be the thickness direction of the flexible display screen 2', and the second direction F2' can be the length direction of the flexible display screen 2'. It can be understood from the following that the flexible display screen 2' is bent or flattened around an axis, and the axis is perpendicular to the length direction of the flexible display screen 2' and parallel to the width direction of the flexible display screen 2'. It should be noted that the length direction of the flexible display screen 2" and the length direction of the flexible display screen 2 mentioned below can also be understood in the same way, and will not be explained one by one later.

[0096] like Figure 1a to Figure 1b As shown, the foldable electronic device 100' comprises a flexible display screen 2' and a housing assembly 3', wherein the housing assembly 3' comprises a first middle frame 31', a second middle frame 32' and a hinge mechanism 33', and the flexible display screen 2' comprises a protective film 21', a cover plate 22', a functional layer 23' and a support member 25' which are sequentially stacked in a first direction F1'. The flexible display screen 2' is laid on the housing assembly 3' through the support member 25', and the support member 25' and the housing assembly 3' are connected by a glue layer 242'. When the foldable electronic device 100' is opened or folded, the flexible display screen 2' is bent or flattened around an axis, and the functional layer 23' and the bending area W' of the support member 25' are bent or flattened synchronously. A plurality of holes 251' are staggered in the bending area W' of the support member 25' to improve the bending and stretching properties of the support member 25', so that the support member 25' is easy to bend and can be bent multiple times without breaking or creases. However, since the hinge mechanism 33' is composed of multiple parts, the surface of the hinge mechanism 33' is uneven and has a height difference, and some hole structures 331' are easily formed between it and the support member 25'. In addition, the holes 251' inside the support member 25', these gaps reduce the anti-extrusion and anti-collision capabilities of the flexible display 2'. For example, when a user clicks the flexible display 2' with a stylus, or when the stylus falls on the flexible display 2', the flexible display 2' is subjected to a force in the first direction F1', causing the functional layer 23' to sink toward the holes 251' inside the support member 25' or even the hole structures 331' on the hinge mechanism 33', resulting in damage to the flexible display 2'.

[0097] In order to improve the reliability of the flexible display screen 2', a stainless steel sheet 26' is provided between the support member 25' and the functional layer 23', and the stainless steel sheet 26' and the support member 25' are connected by an adhesive layer 241'. The stainless steel sheet 26' has a relatively high rigidity, which can prevent the functional layer 23' from being sunken or deformed toward the gap on the support member 25' and the rotating shaft mechanism 33', thereby improving the supporting capacity of the support member 25' for the functional layer 23'. In order to ensure the flatness of the functional layer 23', the stainless steel sheet 26' is the same size as the flexible display screen 2'. Although the introduction of the stainless steel sheet 26' improves the reliability of the flexible display screen 2', due to the high density of stainless steel, it also increases the weight and thickness of the flexible display screen 2', which is not conducive to the thinness of the terminal product.

[0098] See also Figure 2a to Figure 2b , Figure 2a is a schematic diagram of a cross-sectional structure of a second foldable electronic device; Figure 2b This is a schematic diagram of the cross-sectional structure of a flexible display screen of a second foldable electronic device.

[0099] like Figure 2a to Figure 2b As shown, for ease of understanding, the first direction F1" and the second direction F2" are shown in the figure, and the first direction F1" and the second direction F2" are perpendicular to each other. Among them, the first direction F1" can be the thickness direction of the flexible display screen 2", and the second direction F2" can be the length direction of the flexible display screen 2".

[0100] The foldable electronic device 100" includes a flexible display screen 2" and a shell assembly 3", wherein the shell assembly 3" includes a first middle frame 31", a second middle frame 32" and a hinge mechanism 33", and the flexible display screen 2" includes a protective film 21", a cover plate 22", a functional layer 23" and a support member 25" which are stacked in sequence in a first direction F1". Unlike the above-mentioned foldable electronic device 100', the stainless steel sheet 26" of the foldable electronic device 100" is arranged between the support member 25" and the shell assembly 3", and the support member 25" and the stainless steel sheet 26" are connected by an adhesive layer 241", and at a position where the stainless steel sheet 26" is arranged, the stainless steel sheet 26" and the shell assembly 3" are connected by an adhesive layer 242", and at a position where the stainless steel sheet 26" is not arranged, the support member 25" and the shell assembly 3" are connected by an adhesive layer 242". Compared with the above-mentioned foldable electronic device 100', the size of the stainless steel sheet 26" in the foldable electronic device 100" is also reduced, and the stainless steel sheet 26" only covers the bending area W" and a part of the non-bending area of ​​the support member 25". The stainless steel sheet 26" prevents the functional layer 23" from continuing to sink or deform toward the hole structure 331" on the hinge mechanism 33" after passing through the hole 251" on the support member 25", thereby ensuring the reliability of the flexible display screen 2". In addition, the gap between the shell assembly 3" and the support member 25" is filled by increasing the local thickness of the middle frame, that is, the first middle frame 31" and the second middle frame 32" are not of equal thickness, and the step difference between the stainless steel sheet 26" and the support member 25" is compensated by thickening the second middle frame 32". This structure can reduce the size of the stainless steel sheet 26" while ensuring the flatness of the functional layer 23". Since the material of the middle frame has a lower density than that of stainless steel, this structure can reduce the weight of the flexible display 2" to a certain extent, but the thickness of the stainless steel sheet 26" cannot be reduced, and the problem of the thick flexible display 2" still exists.

[0101] Therefore, in the above solution, it is difficult for the flexible display screen of the foldable electronic device to be lightweight while meeting the reliability requirement, which in turn affects the lightweightness of the entire device and affects the user experience of consumers.

[0102] To this end, an embodiment of the present application provides a support member. Through the structural design of the support member, the weight and thickness of the flexible display screen can be reduced while meeting the reliability of the flexible display screen, thereby achieving a lightweight design of the entire foldable electronic device and improving the user experience.

[0103] The present application provides a foldable electronic device, and the support member provided by the present application is applied to the flexible display screen of the foldable electronic device. The foldable electronic device provided by the present application may be, but is not limited to, a foldable screen mobile phone, a foldable tablet computer, a foldable display, a foldable reader, a personal digital device, a smart wearable device, and a vehicle-mounted device. The present application does not limit the specific type of foldable electronic device. The following is an example of a foldable screen mobile phone to illustrate the structure of the foldable electronic device.

[0104] See also Figures 3 to 5a , Figure 3 This is a schematic diagram of the exploded structure of a foldable electronic device according to an embodiment of the present application; Figure 4a This is a schematic diagram of the structure of a foldable electronic device in an unfolded state according to an embodiment of the present application; Figure 4b This is a schematic diagram of the structure of a foldable electronic device in a closed state according to an embodiment of the present application; Figure 4c This is a schematic diagram of the structure of the foldable electronic device according to an embodiment of the present application when it is unfolded at a certain angle; Figure 5a This is a schematic cross-sectional structure diagram of a first embodiment of a foldable electronic device according to an embodiment of the present application.

[0105] like Figure 3 As shown, the foldable electronic device 100 includes a housing assembly 3 and a flexible display screen 2, and the flexible display screen 2 is laid on one side of the housing assembly 3. The housing assembly 3 provides support for the flexible display screen 2, and its specific structure is not limited. In one embodiment, the housing assembly 3 includes a first middle frame 31, a second middle frame 32, and a hinge mechanism 33. The first middle frame 31 and the second middle frame 32 are rotatably connected by the hinge mechanism 33, so that the foldable electronic device 100 switches between an unfolded state (also called an open state) and a closed state (also called a folded state).

[0106] For example, Figure 4a As shown, when the foldable electronic device 100 is in the unfolded state, the unfolded angle is 180°, that is, the angle between the first middle frame 31 and the second middle frame 32 is 180°, or it can be understood that the first middle frame 31 and the second middle frame 32 are coplanar. It can be understood by those skilled in the art that the unfolded angle of the foldable electronic device 100 can also be 170°, 190°, 210°, etc., and this application does not limit this. Moreover, the angles illustrated in this application are allowed to have a small deviation. For example, when the foldable electronic device 100 is in the unfolded state, the unfolded angle can be 180°, or it can be approximately 180°, such as 179°, 181°, etc., and the same understanding can be made for other angles later.

[0107] Furthermore, the first middle frame 31 and the second middle frame 32 can both rotate around the shaft mechanism 33, so that the first middle frame 31 and the second middle frame 32 rotate relative to each other. When the first middle frame 31 and the second middle frame 32 rotate relative to each other to overlap each other, the foldable electronic device 100 is as follows: Figure 4b In the closed state shown in the figure, the angle between the first middle frame 31 and the second middle frame 32 can be approximately regarded as 0°. Figure 4c As shown, the foldable electronic device 100 can also be unfolded at a certain angle, for example, the first middle frame 31 and the second middle frame 32 can also form a certain angle, so that the foldable electronic device 100 can be switched to a usage mode where it can be placed on a desktop. At this time, the first middle frame 31 can be placed on a placement surface such as a desk or a storage table to ensure that the foldable electronic device is placed stably.

[0108] like Figures 3 to 5a As shown, the flexible display screen 2 has good bending performance, and the flexible display screen 2 can maintain a stable picture display and a sensitive touch experience when it is deformed or bent. Therefore, the flexible display screen 2 laid on the shell component 3 can be bent or flattened as the shell component 3 is folded or unfolded, and maintain a continuous, stable picture display and sensitive touch function. In one embodiment, the flexible display screen 2 includes a first part 201, a second part 202 and a foldable part 203, wherein the first part 201 of the flexible display screen 2 is fixedly connected to the first middle frame 31, the second part 202 is fixedly connected to the second middle frame 32, and the foldable part 203 is arranged between the first part 201 and the second part 202, and is stacked with the hinge mechanism 33. During the use of the foldable electronic device 100, the first part 201 and the second part 202 of the flexible display screen 2 always remain in a planar state, and the foldable part 203 of the flexible display screen 2 is bent with the shell component 3.

[0109] Optionally, the flexible display screen 2 can be a flexible screen that is foldable as a whole, or the flexible display screen 2 can also be a combination of a rigid screen and a flexible screen. For example, the foldable part 203 of the flexible display screen 2 is a flexible screen, the first part 201 and the second part 202 are rigid screens, etc. This application does not impose any restrictions on this.

[0110] Optionally, the flexible display screen 2 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (miniorganic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display screen, etc., and the present application does not impose any restrictions on this.

[0111] like Figures 4a to 4c As shown, in one embodiment, the foldable electronic device 100 is an inward-folding electronic device. Figure 4a When the foldable electronic device is in the unfolded state shown in FIG. 1 , a large screen display can be realized, providing the user with a wider field of view, richer information, and a better user experience. Figure 4b In the closed state shown, the housing assembly 3 surrounds the outside of the flexible display screen 2, or it can be understood that the first part 201 and the second part 202 of the flexible display screen 2 are arranged opposite to each other. At this time, the flexible display screen 2 is on the inside, and the housing assembly 3 can protect the flexible display screen 2. In addition, the foldable electronic device 100 has a smaller volume, which is convenient for users to store and carry it. When the inward-folding electronic device is in the state as shown in FIG. Figure 4c In the state shown, a certain angle is formed between the first middle frame 31 and the second middle frame 32, so that the foldable electronic device 100 is switched to a usage mode that can be placed on a desktop. One of the first part 201 and the second part 202 of the flexible display screen 2 can be an operating end, and the other can be a display end, which is convenient for users to use.

[0112] In other alternative embodiments, the foldable electronic device 100 may also be an outward-folding electronic device, which is not limited in the present application. When the outward-folding electronic device is in a closed state, the flexible display screen 2 is surrounded by the outside of the housing assembly 3. Or it can be understood that the first part 201 and the second part 202 of the flexible display screen 2 are arranged back to back. When the outward-folding electronic device is in a closed state, the entire display area of ​​the flexible display screen 2 can still display normally and interact with the user, and the size is smaller than the size in the unfolded state, so that the outward-folding electronic device in the closed state can be convenient for the user to operate or carry with one hand, thereby improving the flexibility of the use of the outward-folding electronic device.

[0113] It can be understood by those skilled in the art that Figures 3 to 5a The foldable electronic device 100 shown is only an example of a foldable electronic device and does not constitute a specific limitation on the foldable electronic device of the embodiment of the present application. The foldable electronic device 100 may have more or fewer components than those shown in the figure. Optionally, the foldable electronic device 100 may also include: a processor, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, a microphone, a motor, a speaker, a mobile communication module, an antenna, a wireless communication module, an audio module, a headphone interface, a sensor module, a button, a camera, and a user identification module.

[0114] It can be understood by those skilled in the art that Figures 3 to 5a The foldable electronic device 100 shown includes two parts that can be folded with each other, each part can be understood as a functional area, including a middle frame and a corresponding area in the flexible display screen 2. In other alternative embodiments, the foldable electronic device 100 can include more than two functional areas. For example, the housing component 3 can include three or more middle frames, and the adjacent middle frames are connected by a hinge mechanism 33, so that multiple areas of the housing component 3 can be folded or unfolded. For example, when the housing component 3 includes three middle frames connected in sequence, the areas corresponding to the two hinge mechanisms 33 of the housing component 3 can be folded or unfolded, and the flexible display screen 2 covering the housing component 3 can also have two corresponding bendable or unfoldable areas. At the same time, different areas in the housing component 3 that can be folded or unfolded can have the same or different states. For example, when there are two areas in the housing component 3 that can be folded or unfolded, one of the areas of the housing component 3 can be in a closed state and the other area can be in an unfolded state.

[0115] In other alternative embodiments, the housing assembly 3 may be made of a flexible material, so that the entire housing assembly 3 can be bent freely or in a specific direction. In this case, the entire area of ​​the flexible display screen 2 covered by the housing assembly 3 can also be bent freely with the entire housing assembly 3 or in the same specific direction.

[0116] It can be understood by those skilled in the art that, during the unfolding and folding of the foldable electronic device 100, at least part of the flexible display screen 2 can be bent accordingly as the shell assembly 3 is folded or unfolded. The area where the flexible display screen 2 is bent as the shell assembly 3 is folded or unfolded is defined as the foldable portion 203, and the area where the flexible display screen 2 is not bent during the folding or unfolding of the shell assembly 3 is the non-foldable portion. It should be emphasized that the specific shape and structure of the non-foldable portion of the flexible display screen 2 in the present application are not limited. For example, the non-foldable portion of the flexible display screen 2 can be an area that maintains a flat display, or it can be an area that is kept in a bent state and performs a curved display.

[0117] It can be understood by those skilled in the art that the flexible display screen 2 is a core component for realizing functions such as picture display and touch control. It not only needs to integrate multiple functional modules inside, but also needs to have a stable supporting structure so that the flexible display screen 2 can maintain functional stability and connection with the shell assembly during bending and flattening.

[0118] like Figure 5aAs shown, for ease of understanding, the first direction F1 and the second direction F2 are shown in the figure, and the first direction F1 and the second direction F2 are perpendicular to each other. Among them, the first direction F1 can be the thickness direction of the flexible display screen 2, and the second direction F2 can be the length direction of the flexible display screen 2. In one embodiment, the flexible display screen 2 includes a functional layer 23 and a support member 25. Among them, the functional layer 23 is used to achieve interaction with the user. In one embodiment, the functional layer 23 includes a touch layer (not shown in the figure), a display layer (not shown in the figure), and a glue layer (not shown in the figure) connecting the touch layer and the display layer. The touch layer enables the user to perform touch operations, the display layer enables the functional layer 23 to provide the user with a picture, and the glue layer makes the connection between the touch layer and the display layer of the functional layer 23 reliable, and the thickness and weight of the glue layer are very small, which is conducive to the thinness of the flexible display screen 2. In other alternative embodiments, the functional layer 23 may include more laminated layers to expand the performance of the flexible display screen 2, or include fewer laminated layers to further achieve the thinness of the flexible display screen 2, or use other laminated layers to achieve different effects, and this application is not limited to this. When the foldable part 203 of the flexible display screen 2 is bent, the functional layer 23 and the support member 25 corresponding to the area of ​​the foldable part 203 of the flexible display screen 2 can be bent synchronously, and the bending direction and bending method of the functional layer 23 and the support member 25 are synchronized with the bending direction and bending method of the flexible display screen 2.

[0119] like Figure 5a As shown, in one embodiment, the flexible display screen 2 further includes a protective film 21 and a cover plate 22. The protective film 21 and the cover plate 22 are sequentially stacked and arranged on the side of the functional layer 23 away from the support member 25, and play a positive protection role for the functional layer 23, and can prevent scratches, oil stains, etc. from being left on the functional layer 23. It should be noted that the flexible display screen 2 may not be provided with the protective film 21 and the cover plate 22.

[0120] In one embodiment, the functional layer 23 is made of a flexible material. The rigidity and strength of the flexible material are both relatively small, so that the functional layer 23 is easy to bend, and no creases are generated after bending multiple times, ensuring that the flexible display screen 2 has a good display effect. However, when subjected to external force, the functional layer 23 made of a flexible material is also prone to deformation, depression and the like, affecting its display effect. Therefore, in the first direction F1, a support member 25 is provided on one side of the functional layer 23. It can be understood that the side of the functional layer 23 facing away from the support member 25 faces the user to provide information to the user. The side of the functional layer 23 facing the user is defined as the front side of the functional layer 23, and the side facing the support member 25 is defined as the back side of the functional layer 23. When the user performs operations such as clicking on the flexible display screen 2, the functional layer 23 is subjected to a force from the front side.

[0121] like Figure 5aAs shown, in one embodiment, the support member 25 is arranged between the functional layer 23 and the shell assembly 3. It can be understood that the flexible display screen 2 is laid on the shell assembly 3 through the support member 25, and the support member 25 and the shell assembly 3 are connected by the adhesive layer 242. In the first direction F1, the side surface of the support member 25 facing the functional layer 23 is its support surface 25a, and the support surface 25a of the support member 25 is set to a flat surface, so that the functional layer 23 can maintain a high flatness, thereby having a good display effect. The support member 25 is made of a material with high rigidity and strength, and can provide support for the functional layer 23 in the thickness direction. When the functional layer 23 is subjected to a force from the front, the force can be transmitted to the support member 25, and the reaction force generated on the support member 25 can prevent the functional layer 23 from sinking or deforming downward, thereby ensuring the reliability of the flexible display screen 2. The support member 25 can also play a role in buffering the impact force on the flexible display screen 2. The structure of the support member is described below in conjunction with the accompanying drawings to better illustrate the technical effects that can be produced by the support member provided by the present application.

[0122] See also Figure 5b to Figure 5d , Figure 5b to Figure 5c This is a schematic diagram of the principle structure of the first implementation mode of the support member of the embodiment of the present application; Figure 5d This is a schematic cross-sectional structure diagram of a first implementation of the flexible display screen of an embodiment of the present application.

[0123] like Figure 5b As shown, in one embodiment, the support member 25 includes a first support layer 251, and the first support layer 251 includes a bending area W and a non-bending area R connected to the bending area W. The bending area W of the first support layer 251 is arranged corresponding to the foldable part 203 of the flexible display screen 2. When the foldable part 203 of the flexible display screen 2 is bent or unfolded, the bending area W of the first support layer 251 is deformed, and the non-bending area R of the first support layer 251 always remains flat. In one embodiment, the non-bending area R of the first support layer 251 includes a first non-bending area R1 and a second non-bending area R2, the first non-bending area R1 is arranged corresponding to the first part 201 of the flexible display screen 2, and the second non-bending area R2 is arranged corresponding to the second part 202 of the flexible display screen 2.

[0124] It can be understood that the bending area W of the first supporting layer 251 should have a high bending performance to ensure that the flexible display screen 2 can be bent normally. Figure 5aAs shown, in one embodiment, in order to improve the bending performance of the bending zone W of the first supporting layer 251, a plurality of holes 2513 are staggered in the bending zone W of the first supporting layer 251. Among them, the specific number of the plurality of holes 2513 is not limited and can be set as needed. Only a few are drawn in the figure for illustration. It should be noted that the specific structure of the hole 2513 is not limited, and it can be a blind hole or a through hole. The size of each hole 2513 in all directions can be the same or different. In one embodiment, each hole 2513 is a through hole extending along the first direction F1. It should be noted that the present application does not limit the distribution of the plurality of holes 2513. In one embodiment, in a plane perpendicular to the first direction F1 (for example, the first plane M), the projections of the plurality of holes 2513 are arranged in an array to form a grid structure, also known as a bamboo book structure. The multiple holes 2513 arranged in an array can reduce the stress concentration generated in the bending area W of the first support layer 251 when bending, and prevent the bending area W of the first support layer 251 from breaking or creases after multiple bending, so that the support member 25 can bend synchronously with the functional layer 23 and provide stable and reliable supporting force for the functional layer 23.

[0125] It can be understood by those skilled in the art that, since the hinge mechanism 33 is composed of multiple parts, the surface of the hinge mechanism 33 is uneven, there is a height difference, and some hole structures 331 are easily formed between it and the support member 25, and the holes 2513 inside the support member 25, these gaps cause the flexible display screen 2 to reduce its anti-extrusion, anti-impact, and anti-collision capabilities. The following is an example of some scenarios. In some cases, the flexible display screen 2 is squeezed, for example, the user clicks on the flexible display screen 2 to operate, or uses a touch screen pen to write. In some cases, the flexible display screen 2 is impacted, for example, items such as touch screen pens and headphones fall from a certain height onto the flexible display screen 2. In some cases, the flexible display screen 2 is bumped, for example, the user accidentally hits the flexible display screen 2 against a hard object. In the above scenario, the flexible display screen 2 is subjected to a force in the first direction F1, so that the flexible functional layer 23 tends to be recessed toward the support member 25 along the first direction F1. If the support member 25 is only composed of the first support layer 251, in the area corresponding to the non-bending area R of the first support layer 251, the first support layer 251 is in contact with the functional layer 23, and can provide reliable supporting force to ensure that the functional layer 23 does not sink or deform. However, in the area corresponding to the bending area W of the first support layer 251, due to the presence of multiple holes 2513, there is a gap between the first support layer 251 and the functional layer 23, and the functional layer 23 will sink toward the holes 2513 on the first support layer 251. In some cases, the functional layer 23 will pass through the holes 2513 on the first support layer 251 and continue to sink and deform toward the hole structure 331 on the hinge mechanism 33, resulting in excessive deformation, causing damage to the functional layer 23 and defects such as bright spots on the flexible display screen 2, affecting user use.

[0126] like Figure 5a to Figure 5d As shown, in one embodiment, the support member 25 also includes a second support layer 252. The first support layer 251 and the second support layer 252 are stacked. Specifically, the first support layer 251 has a first surface 251a and a second surface 251b that are arranged opposite to each other in a first direction F1 (parallel to the thickness direction of the support member 25), the first surface 251a faces the functional layer 23, and the second surface 251b faces away from the functional layer 23. A groove 2511 is provided on the first support layer 251, and the groove 2511 is formed by being recessed from the first surface 251a of the first support layer 251 toward the second surface 251b. Among them, the formation method of the groove 2511 is not limited. For example, a local area of ​​the first support layer 251 can be thinned to form the groove 2511. In an alternative embodiment, the groove 2511 can also be formed by being recessed from the second surface 251b of the first support layer 251 toward the first surface 251a (refer to Figure 7a, which will be described in detail later). The portion of the first supporting layer 251 located at the bottom of the groove 2511 is the groove bottom wall 2512 of the first supporting layer 251, and the second supporting layer 252 is arranged in the groove 2511 and stacked with the groove bottom wall 2512 of the first supporting layer 251. Among them, the area where the groove 2511 is arranged in the first supporting layer 251 is the recessed area O of the first supporting layer 251, and the other areas of the first supporting layer 251 except the recessed area O are the non-recessed areas P.

[0127] It can be understood by those skilled in the art that at least a portion of the groove 2511 is located in the bending zone W of the first supporting layer 251, so that at least a portion of the bending zone W of the first supporting layer 251 is the recessed area O of the first supporting layer 251, and the second supporting layer 252 covers at least a portion of the bending zone W of the first supporting layer 251, thereby preventing the functional layer 23 from sinking into the hole structure 331 on the hinge mechanism 33, causing excessive deformation and causing failure of the functional layer 23 and the flexible display screen 2.

[0128] The support member 25 provided in the embodiment of the present application is divided into a first support layer 251 and a second support layer 252. The first support layer 251 is mainly used to achieve the bending and stretching performance of the support member 25. The second support layer 252 has a large rigidity and is not easily deformed after being impacted, thereby improving the support capacity of the support member 25. In addition, the second support layer 252 covers at least part of the bending area W of the first support layer 251. When a hole 2513 is provided in the bending area W of the first support layer 251, the second support layer 252 can reduce the influence of the hole 2513 of the first support layer 251 on the overall structure of the support member 25, thereby improving the anti-extrusion and anti-collision capabilities of the support member 25, preventing the functional layer 23 from being dented or deformed after being impacted or collided, thereby structurally strengthening the support capacity of the support member 25 on the functional layer 23, and ensuring the reliability of the flexible display screen 2.

[0129] Further, the second supporting layer 252 is arranged in the groove 2511 of the first supporting layer 251, that is, an embedded design is adopted, which reduces the space occupied by the second supporting layer 252 in the thickness direction of the supporting member 25, thereby avoiding the thickness increase of the flexible display screen 2. In addition, the groove 2511 is formed by the surface of one side of the first supporting layer 251 being recessed inward, which means that in the first plane M, the size of the groove 2511 is smaller than the size of the first supporting layer 251, and the size of the second supporting layer 252 is also smaller than the size of the first supporting layer 251. Or it can be understood that the second supporting layer 252 does not need to cover the entire area of ​​the first supporting layer 251, and only a part of the bending area W of the first supporting layer 251 can be covered. And due to the embedded design, the surfaces of the first supporting layer 251 and the second supporting layer 252 can be flatly connected to stably support the functional layer 23. This allows the second supporting layer 252 to be smaller in size, the overall weight of the supporting member 25 is reduced, and the weight of the flexible display screen 2 is also lighter.

[0130] Therefore, the support member provided in the embodiment of the present application can make the flexible display screen lighter and thinner while ensuring the structural reliability of the flexible display screen, thereby realizing a lighter and thinner design of the entire foldable electronic device and improving the user experience.

[0131] like Figure 5a to Figure 5c As shown, in one embodiment, the second support layer 252 is fixed to the groove bottom wall 2512 of the first support layer 251 by the adhesive layer 241. The connection effect of the adhesive layer 241 is good, so that the first support layer 251 and the second support layer 252 are reliably connected, and the elastic deformation effect of the adhesive is good, easy to bend, and will not reduce the bending performance of the support member 25. In addition, the thickness of the adhesive is relatively thin, which can be 0.01mm~0.02mm (the thickness value here is only for example), and the weight of the adhesive is light, which is conducive to the thinness of the flexible display screen 2. Among them, the adhesive can be solid adhesive (for example, double-sided adhesive) or liquid adhesive, etc., and the specific form and material of the adhesive layer 241 are not limited in this application. In other alternative embodiments, the first support layer 251 and the second support layer 252 can also be connected in other ways, and this application is not limited to this.

[0132] In one embodiment, the density of the second support layer 252 is greater than the density of the first support layer 251, and the modulus of the second support layer 252 is greater than the modulus of the first support layer 251. Under the condition of a certain size, the greater the modulus of the material, the greater the rigidity, the greater the structural strength of the material, and the less likely the material is to deform. The modulus of the second support layer 252 is greater than the modulus of the first support layer 251, so that the first support layer 251 is mainly used to achieve the bending and stretching properties of the support member 25 and to provide certain support to the functional layer 23, and the second support layer 252 is mainly used to improve the support capacity of the support member 25 and solve the problem that the foldable part 203 of the flexible display screen 2 is easily damaged. When the flexible display screen 2 is impacted or collided, the second support layer 252 is not easy to deform, and can provide reliable support for the functional layer 23, so that the functional layer 23 does not sag or deform, and reduces the influence of the hole 2513 on the bending area W of the first support layer 251 and the hole-shaped structure 331 on the hinge mechanism 33 on the reliability of the flexible display screen 2.

[0133] In one embodiment, the second support layer 252 is made of materials such as stainless steel, and the first support layer 251 is made of materials such as titanium alloy and carbon fiber, so that the density and modulus of the second support layer 252 are greater than those of the first support layer 251. In other alternative embodiments, the first support layer 251 and the second support layer 252 may also be made of other suitable materials, such as polymer materials, etc., which is not limited in the present application.

[0134] In one embodiment, the thickness of the second support layer 252 is less than the thickness of the non-depressed area P of the first support layer 251. It can be understood by those skilled in the art that the modulus of the second support layer 252 is greater than the modulus of the first support layer 251, so the second support layer 252 is more difficult to bend relative to the first support layer 251. The thickness of the second support layer 252 is designed to be smaller, and the force required when bending is smaller, which makes the second support layer 252 easy to bend and flatten from a structural point of view, and the bending and flattening of the first support layer 251, the second support layer 252 and the functional layer 23 can be kept consistent. In addition, the smaller the thickness of the second support layer 252, the more conducive it is to achieve a thin and light support member 25.

[0135] It should be noted that the thickness ratio of the non-depressed area P of the second support layer 252 and the first support layer 251 is not limited. In one embodiment, the thickness of the second support layer 252 is 1 / 10 to 1 / 5 of the thickness of the non-depressed area P of the first support layer 251. The thickness of the non-depressed area P of the second support layer 252 and the first support layer 251 is not limited. For example, the thickness of the second support layer 252 can be 0.02 mm, and the thickness of the non-depressed area P of the first support layer 251 can be 0.1 to 0.2 mm, such as 0.12 mm, 0.15 mm, etc. At this time, the thickness of the non-depressed area P of the first support layer 251 is much greater than the thickness of the second support layer 252, and the first support layer 251 with a lower density accounts for a larger proportion in the support member 25, which is conducive to better reducing the weight of the support member 25. In addition, the size of the depressed area O of the first support layer 251 is smaller than that of the non-depressed area P, and the impact on the performance of the first support layer 251 can be basically ignored. The thickness of the second supporting layer 252 and the thickness of the non-recessed area P of the first supporting layer 251 may also be other sizes, which is not limited in the present application.

[0136] Those skilled in the art will appreciate that only a portion of the second supporting layer 252 needs to be embedded in the first supporting layer 251. The present application does not limit the specific structures such as the size relationship, position relationship, connection method, and shape and position of the groove 2511 on the first supporting layer 251 between the first supporting layer 251 and the second supporting layer 252. The following is an example of possible structures of the support member 25 in combination with several embodiments.

[0137] See also Figures 6a to 6c , Figure 6a This is a schematic diagram of the principle structure of the second implementation mode of the support member of the embodiment of the present application; Figure 6b This is a schematic cross-sectional structure diagram of a second implementation mode of the flexible display screen of the present application embodiment; Figure 6c This is a schematic cross-sectional structure diagram of a second embodiment of the foldable electronic device of the present application.

[0138] like Figures 5a to 6cAs shown, in one embodiment, the first surface 251a of the first supporting layer 251 is recessed toward the second surface 251b to form a groove 2511, and the second supporting layer 252 is entirely disposed in the groove 2511 along its thickness direction. In the first direction F1, the second supporting layer 252 has a first surface 252a and a second surface 252b disposed opposite to each other, the first surface 252a faces the functional layer 23, and the second surface 252b faces away from the functional layer 23. The first surface 252a of the second supporting layer 252 and the first surface 251a of the first supporting layer 251 can be located on the same plane, and together constitute the supporting surface 25a of the supporting member 25, stably supporting the functional layer 23. It can also be understood that the sum of the thickness of the second supporting layer 252 and the thickness of the adhesive layer 241 is equal to the depth of the groove 2511.

[0139] Compared with the flexible display screen 2' of the first solution and the flexible display screen 2", the second solution adopts Figure 5d and Figure 6c In the structure shown in , the thickness of the flexible display screen 2 is reduced, and the reduced thickness is the sum of the thickness of the second support layer 252 and the thickness of the adhesive layer 241. In addition, the second surface 252b of the second support layer 252 facing away from the groove bottom wall 2512 and the first surface 251a of the first support layer 251 are located in the same plane, and together constitute the support surface 25a of the support member 25, so that the functional layer 23 is flat and the display effect is good.

[0140] In other alternative embodiments, the first surface 252a of the second supporting layer 252 and the first surface 251a of the first supporting layer 251 may be located on different planes. For example, in the first direction F1, the first surface 252a of the second supporting layer 252 is located on the side of the first surface 251a of the first supporting layer 251 facing the second surface 251b, that is, the entire second supporting layer 252 along its thickness direction is arranged in the groove 2511, and the sum of the thickness of the second supporting layer 252 and the thickness of the glue layer 241 is less than the depth of the groove 2511; or, in the first direction F1, the first surface 252a of the second supporting layer 252 protrudes from the first surface 251a of the first supporting layer 251, that is, part of the second supporting layer 252 along its thickness direction is arranged in the groove 2511, and the sum of the thickness of the second supporting layer 252 and the thickness of the glue layer 241 is greater than the depth of the groove 2511. At this time, the support surface 25a of the support member 25 is uneven, and the adhesive layer connecting the functional layer 23 and the support member 25 can be designed to have a structure of unequal thickness so that the functional layer 23 is placed flat.

[0141] like Figure 5a-Figure 6cAs shown, in one embodiment, on the first plane M, the orthographic projection of the groove 2511 coincides with the orthographic projection of the second supporting layer 252, that is, on the first plane M, the size of the groove 2511 is the same as the size of the second supporting layer 252. The second supporting layer 252 is completely matched with the groove 2511 of the first supporting layer 251, and no gap that affects the supporting capacity of the support member 25 is generated after the first supporting layer 251 and the second supporting layer 252 are assembled. It can be understood by those skilled in the art that in other alternative embodiments, the orthographic projections of the groove 2511 and the second supporting layer 252 on the first plane M may not coincide, that is, on the first plane M, the size of the second supporting layer 252 may be smaller than the size of the groove 2511, in which case there is a gap between the first supporting layer 251 and the second supporting layer 252, but the machining accuracy requirements for the second supporting layer 252 and the groove 2511 are lower, and the weight of the support member 25 is lighter.

[0142] like Figure 5b-Figure 5c As shown, in one embodiment, the entire area of ​​the bending zone W and a part of the non-bending zone R of the first supporting layer 251 are recessed areas O, another part of the non-bending zone R is a non-recessed area P, and the second supporting layer 252 covers the entire area of ​​the bending zone W and a part of the non-bending zone P. In one embodiment, the entire area of ​​the bending zone W of the first supporting layer 251 and the entire area of ​​the first non-bending zone R1 are set as the recessed area O, and the entire area of ​​the second non-bending zone R2 of the first supporting layer 251 is set as the non-recessed area P, so that the second supporting layer 252 covers the entire area of ​​the bending zone W of the first supporting layer 251 and the entire area of ​​the first non-bending zone R1. In an alternative embodiment, the entire area of ​​the bending zone W and the entire area of ​​the second non-bending zone R2 of the first supporting layer 251 can also be set as the recessed area O, and the entire area of ​​the first non-bending zone R1 of the first supporting layer 251 is set as the non-recessed area P, so that the second supporting layer 252 covers the entire area of ​​the bending zone W and the second non-bending zone R2 of the first supporting layer 251.

[0143] like Figures 6a to 6cAs shown, in one embodiment, in order to further reduce the weight of the support member 25, the second support layer 252 may only cover the bending area W of the first support layer 251, but not the non-bending area R of the first support layer 251. Specifically, the entire area of ​​the bending area W of the first support layer 251 is the recessed area O, and the entire area of ​​the non-bending area R of the first support layer 251 is the non-recessed area P. On the first plane M, the size of the second support layer 252 is equal to the size of the bending area W of the first support layer 251. Since the density of the second support layer is greater than that of the first support layer, this structure minimizes the size of the second support layer 252 on the basis of ensuring the supporting capacity of the support member 25 and the impact and bump resistance of the flexible display screen 2, thereby reducing the weight of the flexible display screen 2 to the greatest extent. In the second direction F2, the two side edges of the groove 2511 can be aligned with the two side boundaries of the bending area W of the first support layer 251, respectively.

[0144] In other alternative embodiments, the recessed area O may also be the entire area of ​​the bending area W and a portion of the non-bending area R of the first supporting layer 251. For example, the recessed area O may be the entire area of ​​the bending area W of the first supporting layer 251, a portion of the first non-bending area R1 and a portion of the second non-bending area R2, or the recessed area O may be the entire area of ​​the bending area W of the first supporting layer 251 and a portion of the first non-bending area R1, or the recessed area O may be the entire area of ​​the bending area W of the first supporting layer 251 and the entire area of ​​the first non-bending area R1, or the recessed area O may be the entire area of ​​the bending area W of the first supporting layer 251 and a portion of the second non-bending area R2, or the recessed area O may be the entire area of ​​the bending area W of the first supporting layer 251 and the entire area of ​​the second non-bending area R2. The recessed area O may also be a partial area of ​​the bending zone W of the first supporting layer 251 , that is, on the first plane M, the size of the groove 2511 is smaller than the size of the bending zone W of the first supporting layer 251 , which will not be listed one by one in this application.

[0145] See also Figures 7a to 12 , Figure 7a to Figure 7b This is a schematic diagram of the principle structure of a third implementation mode of the support member of the embodiment of the present application; Figure 7c This is a schematic cross-sectional structure diagram of a third implementation mode of the flexible display screen of the present application embodiment; Figure 7d It is a schematic cross-sectional structure diagram of a third implementation mode of the foldable electronic device according to an embodiment of the present application; Figure 8 This is a schematic cross-sectional structure diagram of a fourth implementation mode of the flexible display screen of the present application embodiment;

[0146] Fig. 9 This is a schematic cross-sectional structure diagram of a fifth implementation of the flexible display screen of the present application embodiment; Fig.10aThis is a schematic diagram of the principle structure of the fourth implementation mode of the support member of the embodiment of the present application; Fig.10b This is a schematic cross-sectional structure diagram of a sixth implementation mode of the flexible display screen according to an embodiment of the present application; Fig.11 This is a schematic cross-sectional structure diagram of a seventh implementation mode of the flexible display screen according to an embodiment of the present application; Fig.12 This is a schematic cross-sectional structure diagram of an eighth implementation of the flexible display screen according to an embodiment of the present application.

[0147] like Figures 7a to 12 As shown, in one embodiment, the second surface 251b of the first supporting layer 251 is recessed toward the first surface 251a to form a groove 2511, and at least a portion of the second supporting layer 252 along the first direction F1 is disposed in the groove 2511. It can be understood that the first surface 251a of the first supporting layer 251 constitutes the entire supporting surface 25a of the supporting member 25, the second supporting layer 252 is disposed between the groove bottom wall 2512 of the first supporting layer 251 and the housing assembly 3, the first surface 252a of the second supporting layer 252 is connected to the groove bottom wall 2512 of the first supporting layer 251 through the adhesive layer 241, and the second surface 252b of the second supporting layer 252 and the second surface 251b of the first supporting layer 251 can be located in the same plane or in different planes, that is, the depth of the groove 2511 can be designed in combination with the needs of the flexible display screen 2 and the foldable electronic device 100. It should be noted that the second supporting layer 252 is arranged on the side of the groove bottom wall 2512 of the first supporting layer 251 away from the functional layer 23. When the functional layer 23 is subjected to the force from the first direction F1, it will still be recessed toward the hole 2513 on the first supporting layer 251. However, the thickness of the first supporting layer 251 is relatively small, and at least part of the bending area W of the first supporting layer 251 is the recessed area O. The size of each of the multiple holes 2513 of the first supporting layer 251 in the first direction F1 is very small. When the functional layer 23 is recessed toward the hole 2513 on the first supporting layer 251, only a slight deformation occurs, and this slight deformation will not cause damage or failure of the functional layer 23. The second supporting layer 252 can prevent the functional layer 23 from being greatly recessed and deformed toward the hole-like structure 331 on the rotating shaft mechanism 33, and the reliability of the flexible display screen 2 can still be guaranteed.

[0148] like Figures 7a to 7c , Figure 10a to Figure 10bAs shown, in one embodiment, the second surface 252b of the second supporting layer 252 and the second surface 251b of the first supporting layer 251 are located in the same plane, that is, the second supporting layer 252 is entirely disposed in the groove 2511 along its thickness direction, and the sum of the thickness of the second supporting layer 252 and the thickness of the adhesive layer 241 is equal to the depth of the groove 2511. At this time, in the first direction F1, the surface of one side of the support member 25 facing the housing assembly 3 is a plane, which is relatively simple in structure. In other alternative embodiments, the second surface 252b of the second supporting layer 252 and the second surface 251b of the first supporting layer 251 may also be located on different planes.

[0149] like Figure 8 , Fig.11 As shown, in one embodiment, in the first direction F1, the second surface 252b of the second support layer 252 is located on the side of the second surface 251b of the first support layer 251 facing the functional layer 23, that is, the second support layer 252 is entirely disposed in the groove 2511 along its thickness direction, and the sum of the thickness of the second support layer 252 and the thickness of the adhesive layer 241 is less than the depth of the groove 2511, and the thickness of the support member 25 is the thickness of the non-depressed area P of the first support layer 251. It can be understood by those skilled in the art that in the first direction F1, there is a height difference on the side surface of the support member 25 facing the housing component 3. In order to enable the support member 25 to stably support the functional layer 23, compensation can be made by the housing component 3 of unequal thickness, for example, the thickness of the shaft mechanism 33 can be increased to make up for the step difference between the second surface 252b of the second support layer 252 and the second surface 251b of the first support layer 251.

[0150] like Fig. 9 , Fig.12As shown, in one embodiment, in the first direction F1, the second surface 252b of the second supporting layer 252 protrudes from the second surface 251b of the first supporting layer 251, that is, the portion of the second supporting layer 252 along its thickness direction is arranged in the groove 2511, and the sum of the thickness of the second supporting layer 252 and the thickness of the adhesive layer 241 is greater than the depth of the groove 2511. At this time, the thickness space occupied by the support member 25 in the first direction F1 is the sum of the thickness of the groove bottom wall 2512 of the first supporting layer 251, the thickness of the second supporting layer 252 and the thickness of the adhesive layer 241. At this time, the unequal thickness of the support member 25 can also be compensated by the housing component 3 of unequal thickness. Compared with the structure in which the second surface 252b of the second supporting layer 252 does not protrude from the second surface 251b of the first supporting layer 251, the thickness and weight of the support member 25 are slightly increased, but the larger thickness of the support member 25 is conducive to better providing supporting force, so that the reliability of the flexible display screen 2 is higher. Moreover, the thickness and weight of the flexible display screen 2 with this structure are still reduced compared with the flexible display screen 2 ′ of the first solution and the flexible display screen 2 ″ of the second solution.

[0151] Similarly, when the second surface 251b of the first supporting layer 251 is recessed toward the first surface 251a to form the groove 2511, the layout of the recessed area O and the non-recessed area P of the first supporting layer 251 is not limited. Figures 7a to 9 As shown, in one embodiment, the entire area of ​​the bending area W of the first support layer 251 and the entire area of ​​the first non-bending area R1 are set as the recessed area O, and the entire area of ​​the second non-bending area R2 of the first support layer 251 is set as the non-recessed area P, so that the second support layer 252 covers the entire area of ​​the bending area W of the first support layer 251 and the entire area of ​​the first non-bending area R1. The first middle frame 31 and the rotating shaft mechanism 33 are connected to the second surface 252b of the second support layer 252 through the glue layer 242, and the second middle frame 32 is connected to the second surface 251b of the first support layer 251 through the glue layer 242.

[0152] In an alternative embodiment, the entire area of ​​the bending zone W of the first support layer 251 and the entire area of ​​the second non-bending zone R2 can also be set as the recessed area O, and the entire area of ​​the first non-bending zone R1 of the first support layer 251 can be set as the non-recessed area P, so that the second support layer 252 covers the entire area of ​​the bending zone W and the second non-bending zone R2 of the first support layer 251. In other alternative embodiments, the recessed area O can also be the entire area of ​​the bending zone W and a partial area of ​​the non-bending zone R of the first support layer 251. For example, the recessed area O can be the entire area of ​​the bending zone W of the first support layer 251, a partial area of ​​the first non-bending zone R1, and a partial area of ​​the second non-bending zone R2, or the recessed area O can be the entire area of ​​the bending zone W of the first support layer 251 and a partial area of ​​the first non-bending zone R1, or the recessed area O can be the entire area of ​​the bending zone W and a partial area of ​​the second non-bending zone R2 of the first support layer 251. This application will not list them one by one.

[0153] like Figures 10a to 12 As shown, in one embodiment, in order to further reduce the weight of the support member 25, the second support layer 252 only covers the bending area W of the first support layer 251, but does not cover the non-bending area R of the first support layer 252. Specifically, the entire area of ​​the bending area W of the first support layer 251 is the recessed area O, and the entire area of ​​the non-bending area R of the first support layer 251 is the non-recessed area P. On the first plane M, the size of the second support layer 252 is equal to the size of the bending area W of the first support layer 251. In the second direction F2, the two side edges of the groove 2511 are respectively aligned with the two side boundaries of the bending area W of the first support layer 251. The rotating shaft mechanism 33 is connected to the second surface 252b of the second support layer 252 through the adhesive layer 242, and the first middle frame 31 and the second middle frame 32 are connected to the second surface 251b of the first support layer 251 through the adhesive layer 252. In other alternative embodiments, the recessed area O may also be a partial area of ​​the bending area W of the first supporting layer 251 , that is, on the first plane M, the size of the groove 2511 is smaller than the size of the bending area W of the first supporting layer 251 .

[0154] In order to more clearly demonstrate the contribution of the support member provided in the embodiments of the present application to the thinning and lightening of the entire foldable electronic device, the thicknesses of the foldable electronic device 100' of the first solution, the foldable electronic device 100" of the second solution, and multiple embodiments of the foldable electronic device 100 of the present application are compared below.

[0155] Assume that the display area of ​​the flexible display screen in the foldable electronic device 100', the foldable electronic device 100" and the multiple embodiments of the foldable electronic device 100 is the same, which is S0, and the total thickness of the structure of the flexible display screen of the foldable electronic device 100 excluding the support member is the same as the total thickness of the structure of the flexible display screen of the foldable electronic device 100 excluding the support member and the stainless steel sheet, which is represented by A (not shown in the figure). Figure 5d As shown, it is assumed that in each embodiment of the foldable electronic device 100, the area of ​​the first non-bending region R1 of the first supporting layer 251 in a plane perpendicular to the first direction F1 (such as the first plane M) is S1, the area of ​​the second non-bending region R2 is S2, and the area of ​​the bending region W is S3, S0 = S1 + S2 + S3. It should be noted that due to Figure 5d This is a cross-sectional perspective. S0, S1, S2, and S3 in the figure all represent the area of ​​the surface perpendicular to the paper surface. The same understanding can be made for other figures, and this will not be repeated in the following text.

[0156] like Figure 1b As shown, the total thickness of the flexible display screen 2' of the foldable electronic device 100' is H', the thickness of the support member 25' is m', and the thickness of the stainless steel sheet 26' is n', then H'=A+m'+n', the occupied area of ​​the stainless steel sheet 26' is S', and S'=S0.

[0157] like Figure 2b As shown, the total thickness of the flexible display screen 2" of the foldable electronic device 100" is H", the thickness of the support member 25" is m", and the thickness of the stainless steel sheet 26" is n", then H"=A+m"+n", and the occupied area of ​​the stainless steel sheet 26" is S", and S"=S1+S3.

[0158] like Figure 5c to Figure 5d As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H1, the thickness of the first supporting layer 251 is m1, the first surface 252a of the second supporting layer 252 and the first surface 251a of the first supporting layer 251 are located in the same plane, then H1=A+m1, the occupied area of ​​the second supporting layer 252 is S01, and S01=S1+S3.

[0159] like Figure 6c As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H2, the thickness of the first supporting layer 251 is m2, the first surface 252a of the second supporting layer 252 and the first surface 251a of the first supporting layer 251 are located in the same plane, then H2=A+m2, the occupied area of ​​the second supporting layer 252 is S02, and S02=S3.

[0160] like Figure 7dAs shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H3, the thickness of the first supporting layer 251 is m3, and the second supporting layer 252 does not protrude from the first supporting layer 251, then H3=A+m3, the occupied area of ​​the second supporting layer 252 is S03, and S03=S1+S3.

[0161] like Figure 8 As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H4, the thickness of the first supporting layer 251 is m4, and the second supporting layer 252 does not protrude from the first supporting layer 251, then H4=A+m4, and the occupied area of ​​the second supporting layer 252 is S04, S04=S1+S3.

[0162] like Fig. 9 As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H5, the thickness of the first supporting layer 251 is m5, the second supporting layer 252 protrudes from the first supporting layer 251, and the thickness of the second supporting layer 252 protruding from the first supporting layer 251 is q5, H5=A+m5+q5, and the occupied area of ​​the second supporting layer 252 is S05, S05=S1+S3.

[0163] like Fig.10b As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H6, the thickness of the first supporting layer 251 is m6, and the second supporting layer 252 does not protrude from the first supporting layer 251, then H6=A+m6, and the occupied area of ​​the second supporting layer 252 is S06, S06=S3.

[0164] like Fig.11 As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H7, the thickness of the first supporting layer 251 is m7, and the second supporting layer 252 does not protrude from the first supporting layer 251, then H7=A+m7, and the occupied area of ​​the second supporting layer 252 is S07, S07=S3.

[0165] like Fig.12 As shown, the total thickness of the flexible display screen 2 of the foldable electronic device 100 is H8, the thickness of the first supporting layer 251 is m8, the second supporting layer 252 protrudes from the first supporting layer 251, and the thickness of the second supporting layer 252 protruding from the first supporting layer 251 is q8, H8=A+m8+q8, and the occupied area of ​​the second supporting layer 252 is S08, S08=S3.

[0166] It can be understood that m', m", m1, m2, m3, m4, m5, m6, m7, and m8 are equal; n' and n" are equal; the depth of the groove 2511 can be designed to make q5<n', q8<n', therefore, the support member 25 provided in the embodiment of the present application can achieve the effect of thinning the flexible display screen 2 and the foldable electronic device 100. Moreover, in each embodiment of the embodiment of the present application, the occupied area of ​​the second support layer in the plane perpendicular to the first direction is less than S0, therefore, the support member 25 provided in the embodiment of the present application can achieve the effect of reducing the weight of the flexible display screen 2 and the foldable electronic device 100.

[0167] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and modifications.

Claims

1. A support member for a flexible display screen, comprising a first support layer and a second support layer stacked together, characterized in that: The first supporting layer comprises a bending area and a non-bending area connected to the bending area; The first supporting layer has a first surface and a second surface which are arranged opposite to each other in the thickness direction of the supporting member, the first surface constitutes at least a part of the supporting surface of the supporting member, the first supporting layer is provided with a groove, the groove is recessed from one of the first surface and the second surface toward the other surface, at least a part of the groove is located in the bending area, and the part of the first supporting layer located at the bottom of the groove is the groove bottom wall; At least a portion of the second supporting layer along the thickness direction thereof is disposed in the groove and is stacked with the groove bottom wall, and the second supporting layer covers at least a portion of the bending area of ​​the first supporting layer.

2. The support member according to claim 1, characterized in that The area of ​​the first supporting layer where the groove is provided is a recessed area, and the other areas of the first supporting layer except the recessed area are non-recessed areas; Wherein, the entire area of ​​the bending zone is the recessed area, the entire area of ​​the non-bending zone is the non-recessed area, and the second supporting layer covers the entire area of ​​the bending zone; or, The entire area of ​​the bending zone and a part of the non-bending zone are the recessed area, another part of the non-bending zone is the non-recessed area, and the second supporting layer covers the entire area of ​​the bending zone and a part of the non-bending zone.

3. The support member according to claim 1 or 2, characterized in that: In the bending area, the first supporting layer is provided with a plurality of holes arranged at intervals, and each of the plurality of holes is a through hole or a blind hole.

4. The support member according to any one of claims 1 to 3, characterized in that: The orthographic projections of the groove and the second supporting layer on a first plane coincide with each other, wherein the first plane is perpendicular to a thickness direction of the supporting member.

5. The support member according to any one of claims 1 to 4, characterized in that: The groove is recessed from the first surface of the first supporting layer toward the second surface, the second supporting layer is entirely disposed in the groove along its thickness direction, and the surface of the second supporting layer facing away from the groove bottom wall and the first surface of the first supporting layer are located on the same plane and together constitute the entire supporting surface of the support member.

6. The support member according to any one of claims 1 to 4, characterized in that: The groove is sunken from the second surface of the first supporting layer toward the first surface, and the first surface of the first supporting layer constitutes the entire supporting surface of the supporting member; wherein, A portion of the second supporting layer along the thickness direction thereof is disposed in the groove; or, The entire second supporting layer along its thickness direction is disposed in the groove, and a surface of the second supporting layer away from the groove bottom wall and the second surface of the first supporting layer are located on the same plane or on different planes.

7. The support member according to any one of claims 1 to 6, characterized in that: The second supporting layer is adhered and fixed to the bottom wall of the groove through an adhesive layer.

8. The support member according to any one of claims 1 to 7, characterized in that: The density of the second supporting layer is greater than that of the first supporting layer, and the modulus of the second supporting layer is greater than that of the first supporting layer.

9. The support member according to claim 8, characterized in that The material of the first supporting layer is carbon fiber material or titanium alloy, and the material of the second supporting layer is stainless steel.

10. The support member according to any one of claims 1 to 9, characterized in that: The thickness of the second supporting layer is 1 / 10 to 1 / 5 of the thickness of the non-recessed area of ​​the first supporting layer.

11. A flexible display screen, comprising a functional layer, characterized in that: It also includes a support member according to any one of claims 1 to 10, wherein the support member and the functional layer are stacked, and the support surface of the support member supports the functional layer.

12. A foldable electronic device, comprising a housing assembly, characterized in that: The foldable electronic device also includes the flexible display screen as described in claim 11, and the flexible display screen is laid on the shell assembly through the support member.

13. The foldable electronic device according to claim 12, characterized in that: The housing assembly comprises a first middle frame, a second middle frame and a hinge mechanism, the first middle frame and the second middle frame are rotatably connected via the hinge mechanism, the flexible display comprises a first part, a foldable part and a second part connected in sequence, the first part of the flexible display is fixedly connected to the first middle frame, the second part is fixedly connected to the second middle frame, and the foldable part and the hinge mechanism are at least partially stacked; Among them, in the supporting member of the flexible display screen, the non-bending area of ​​the first supporting layer includes a first non-bending area connected to one side of the bending area, and a second non-bending area connected to the other side of the bending area, the first part of the flexible display screen includes the first non-bending area, the foldable part includes the bending area, and the second part includes the second non-bending area.

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