Patent Publication Number: US-2022217857-A1

Title: Supporting Structure and Foldable Display Apparatus

Description:
This application claims priority to Chinese Patent Application No. 201910363515.0, filed with the China National Intellectual Property Administration on Apr. 30, 2019 and entitled “SUPPORTING STRUCTURE AND FOLDABLE DISPLAY APPARATUS”, which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     This application relates to the field of foldable display apparatus technologies, and in particular, to a supporting structure and a foldable display apparatus. 
     BACKGROUND 
     A foldable mobile phone with a flexible screen is an important development trend of modern mobile phones. The flexible screen usually includes planar regions and a bending region connecting two adjacent planar regions. Corresponding to a structure of the foldable flexible screen, a supporting structure of the foldable mobile phone with a flexible screen includes planar supporting portions opposite to the planar regions and a bending supporting portion opposite to the bending region. 
     In a conventional technology, the flexible screen is bonded and fastened to the supporting structure. The bending supporting portion includes an intermediate skeleton and a flexible supporting bar injection-molded with the intermediate skeleton, and the flexible screen is bonded and fastened to the flexible supporting bar. In a process of using the foldable mobile phone with a flexible screen, during folding and unfolding operations, the bending supporting portion and the bending region of the flexible screen are simultaneously bent or unfolded, and the bending supporting portion and the flexible screen each have a specified thickness. In a process of performing unfolding and bending operations for a plurality of times, the flexible screen needs to stretch and contract. Consequently, degumming is likely caused between the flexible screen and the bending supporting portion, resulting in poor products. 
     SUMMARY 
     This application provides a supporting structure of a foldable display apparatus and a foldable display apparatus, to improve strength of connection between a flexible screen and a bending supporting portion, and improve product quality of the foldable display apparatus. 
     According to a first aspect, this application provides a supporting structure of a foldable display apparatus, where the supporting structure of the foldable display apparatus is configured to support a flexible screen of the foldable display apparatus. The flexible screen includes two types of regions: planar regions and a bending region. Specifically, the flexible screen includes at least two planar regions and a bending region connected between the two planar regions. Correspondingly, to reliably support the flexible screen, the supporting structure of the foldable display apparatus includes two types of parts: planar supporting portions and a bending supporting portion. The planar supporting portions are opposite to the planar regions and support the planar regions of the flexible screen, and the bending supporting portion is opposite to the bending region and supports the bending region of the flexible screen. The bending supporting portion includes two parts: a bending skeleton and a flexible supporting bar connected to the bending skeleton, and the flexible supporting bar is in direct contact with the flexible screen. When the flexible screen is unfolded, the flexible supporting bar is configured to support the bending region of the flexible screen, and when the flexible screen is folded, the flexible supporting bar is configured to drive the flexible screen to be folded. In this technical solution, the flexible supporting bar includes at least two parts: a supporting portion and a plurality of connecting portions that are distributed at intervals and fastened to the supporting portion. The supporting portion is connected to the flexible screen. The plurality of connecting portions are located on a side of the supporting portion away from the flexible screen, and the plurality of connecting portions are distributed at intervals. In this case, an end of the connecting portion away from the supporting portion is connected to the bending skeleton. Therefore, there is a specified distance from a joint between the flexible supporting bar and the bending skeleton to the supporting portion. In addition, there is also a specified distance between two adjacent joints. In the foldable display apparatus, the flexible screen is bonded and fastened to the supporting portion of the flexible supporting bar. When the foldable display apparatus is folded, the supporting portion and the flexible screen are bent together, and the supporting portion is connected to the bending skeleton by using the plurality of connecting portions distributed at intervals. Therefore, during bending, relative displacement is generated between the supporting portion and the bending skeleton, so that no relative displacement is likely generated between the supporting portion and the flexible screen. This improves strength of connection between the supporting portion and the flexible screen, reduces a risk of degumming between the flexible screen and the flexible supporting bar, and improves product quality of the foldable display apparatus. 
     In an optional technical solution, the connecting portions may be clamping slot structures, and the bending skeleton includes clamping heads clamped with the clamping slot structures. When the supporting structure of the foldable display apparatus is mounted, the clamping head extends into the clamping slot structure for clamping, to implement connection between the flexible supporting bar and the bending skeleton. When the foldable display apparatus is folded, the supporting portion and the flexible screen are bent together, and displacement is generated between the clamping slot of the supporting portion and the bending skeleton, so that no relative displacement is likely generated between the supporting portion and the flexible screen. This improves strength of connection between the supporting portion and the flexible screen, reduces a risk of degumming between the flexible screen and the flexible supporting bar, and improves product quality of the foldable display apparatus. 
     In another optional technical solution, the connecting portions may be fixed protrusions, the plurality of fixed protrusions are located on a side of the supporting portion away from the flexible screen, and an end of each of the plurality of fixed protrusions away from the supporting portion is connected to the bending skeleton. Therefore, there is a specified distance from the joint between the flexible supporting bar and the bending skeleton to the supporting portion. In the foldable display apparatus, the flexible screen is bonded and fastened to the supporting portion of the flexible supporting bar. When the foldable display apparatus is folded, the supporting portion and the flexible screen are bent together, and displacement is generated between the fixed protrusion of the supporting portion and the bending skeleton, so that no relative displacement is likely generated between the supporting portion and the flexible screen. This improves strength of connection between the supporting portion and the flexible screen. 
     Specifically, there are a plurality of manners in which the fixed protrusion of the flexible supporting bar is connected to the bending skeleton. In a connection manner, the fixed protrusion of the flexible supporting bar is clamped with the bending skeleton. Specifically, the fixed protrusions have fasteners, the bending skeleton includes bayonets in one-to-one adaptation with the fasteners of the fixed protrusions, the fastener may be clamped with the bayonet, and the fastener of the fixed protrusion extends into the bayonet and is clamped with the bayonet. This solution facilitates mounting. In particular, the flexible supporting bar is flexible. Therefore, the fastener may contract and deform to pass through the bayonet, and spring back after passing through the bayonet, to be clamped with the bayonet. In this solution, when the bending supporting portion is bent, a small amount of displacement may be alternatively generated between the fastener and the bayonet, but an effect of connection between the fastener and the bayonet may not be affected. Therefore, relative displacement generated between layers in a folding region when the foldable display apparatus is folded may be further absorbed. In this way, this can improve strength of connection between the supporting portion and the flexible screen, and reduce a disk of degumming between the flexible screen and the flexible supporting bar. 
     A manner for connection between the fastener and the bayonet further includes different implementation solutions. For example, the bayonet may be a groove, or may be a through hole. 
     When the bayonet is a groove, an opening of the groove has a clamping edge. To be specific, a size of the opening of the groove is less than a size of a bottom region of the groove. After the fastener contracts to pass through the clamping edge, the fastener springs back to be accommodated inside the groove, and the fastener is clamped with the clamping edge of the opening, to complete clamping between the flexible supporting bar and the bending skeleton. In this technical solution, because the groove has a slot wall, a structure is relatively regular, and no structural interference likely occurs between the fixed protrusion and another structure. In addition, the groove may further protect the fixed protrusion, so that the fixed protrusion is not likely damaged. 
     When the bayonet is a through hole, after the fastener of the fixed protrusion contracts to pass through the through hole, the fastener springs back and is clamped with an edge of the through hole, to complete clamping between the flexible supporting bar and the bending skeleton. A structure of the through hole is relatively simple, and therefore a manufacturing process can be simplified. 
     In another manner for connection between the flexible supporting bar and the bending skeleton, an end of the fixed protrusion of the flexible supporting bar away from the supporting portion is fastened to the bending skeleton. In this solution, the bending skeleton includes mounting portions in one-to-one adaptation with the fixed protrusions, and the fixed protrusion is fastened to the mounting portion, to complete mounting and connection between the flexible supporting bar and the bending skeleton. 
     To improve stability of mounting between the fixed protrusion and the mounting portion, the mounting portion has a mounting hole. The fixed protrusion passes through the mounting hole of the mounting portion and is then fastened to the mounting portion. Therefore, a hole wall of the mounting hole can limit the fixed protrusion to some extent. In this way, a region in which the fixed protrusion is fixedly connected to the mounting portion does not likely fall off. 
     A manner for fixed connection between the fixed protrusion and the bending skeleton further includes different implementation solutions. For example, the fixed protrusion may be bonded and fastened to the mounting portion. A process in this solution is relatively simple. Alternatively, the fixed protrusion may be hot-melt in the mounting portion. In this solution, connection is relatively stable, and falling-off does not likely occur. 
     In a specific implementation, a shape of the foregoing connecting portion is not specifically limited. For example, the connecting portions may be bar-shaped connecting portions or dot-shaped connecting portions. The shape of the connecting portion may be selected based on an actual product requirement. 
     In a further implementation, when the connecting portions are bar-shaped connecting portions, the bar-shaped connecting portions extend in an extension direction of the flexible supporting bar, and the plurality of bar-shaped connecting portions are disposed in parallel. Specifically, when the foldable display apparatus is folded, a folding direction is perpendicular to the extension direction of the flexible supporting bar. Therefore, in this technical solution, the bar-shaped connecting portions do not need to be bent drastically, and a region between the bar-shaped connecting portions in parallel may be bent drastically, to facilitate a bending operation. In addition, the bar-shaped connecting portions are not likely damaged. This improves a service life. 
     In another implementation, when the connecting portions are dot-shaped connecting portions, the dot-shaped connecting portions are arranged in a matrix on the supporting portion. In an aspect, a relatively reliable connection relationship can be provided. In another aspect, there are bar-shaped gaps between the dot-shaped connecting portions that are arranged in a matrix, to facilitate a folding operation on the foldable display apparatus. 
     In an optional technical solution, the flexible screen may have one bending region, or may have two or more bending regions. Correspondingly, the supporting structure of the foldable display apparatus in this application may include one bending supporting portion, or may include two bending supporting portions. The technical solution of this application can be used provided that the foldable display apparatus includes the bending supporting portion, to improve strength of connection between the flexible screen and the bending supporting portion, and improve product quality of the foldable display apparatus. 
     According to a second aspect, this application further provides a foldable display apparatus, where the foldable display apparatus includes a flexible screen and the supporting structure of the foldable display apparatus in any one of the foregoing technical solutions. A bending supporting portion of the supporting structure includes a flexible supporting bar and a bending skeleton. Distal ends of connecting portions of the flexible supporting bar are fixedly connected to the bending skeleton. Therefore, there may be space for relative movement between the flexible supporting bar and the bending skeleton. When the foldable display apparatus is bent, the flexible screen may be stably connected to a supporting portion of the supporting bar, and degumming does not likely occur, so that product quality of the foldable display apparatus is relatively high. 
     In a specific implementation, a folding direction of the foregoing foldable display apparatus is not limited. The foldable display apparatus may be folded in a direction towards the flexible screen. To be specific, after being folded, the flexible screen is located between supporting housings of the foldable display apparatus. Alternatively, in another specific embodiment, the foldable display apparatus may be folded in a direction away from the flexible screen. To be specific, after being folded, the flexible screen is located on outer sides of supporting housings of the foldable display apparatus. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a top view of a foldable display apparatus according to an embodiment of this application; 
         FIG. 2  is a schematic cross-sectional diagram of a foldable display apparatus according to an embodiment of this application; 
         FIG. 3  is a schematic diagram of a folded state of a foldable display apparatus according to an embodiment of this application; 
         FIG. 4  is a schematic diagram of an unfolded state of a foldable display apparatus according to an embodiment of this application; 
         FIG. 5  is a schematic cross-sectional structural diagram of a bending supporting portion according to an embodiment of this application; 
         FIG. 6  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 7  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 8  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 9  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 10  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 11  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 12  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application; 
         FIG. 13  is a schematic structural diagram of a supporting structure according to an embodiment of this application; 
         FIG. 14  is a schematic structural diagram of another supporting structure according to an embodiment of this application; 
         FIG. 15  is a schematic structural diagram of a foldable display apparatus according to an embodiment of this application; and 
         FIG. 16  is a schematic diagram of a folded state of another foldable display apparatus according to an embodiment of this application. 
     
    
    
     REFERENCE NUMERALS 
     
         
         
           
               1 —Flexible screen; 
               11 —Display panel; 
               12 —Cover; 
               13 —Bonding region; 
               14 —Planar region; 
               15 —Bending region; 
               2 —Supporting structure; 
               21 —Bonding step; 
               22 —Planar supporting portion; 
               23 —Bending supporting portion; 
               231 —Bending skeleton; 
               2312 —Clamping head; 
               2313 —Head; 
               2314 —Clamping neck; 
               2315 —Bayonet; 
               2316 —Groove; 
               2317 —Clamping edge; 
               2318 —Through hole; 
               2319 —Mounting portion; 
               2320 —Mounting hole; 
               232 —Flexible supporting bar; 
               2321 —Supporting portion; 
               2322 —Connecting portion; 
               2323 —Clamping slot; 
               2324 —Slot hole; 
               2325 —Clamping wall; 
               2326 —Fixed protrusion; 
               2327 —Bar-shaped connecting portion; and 
               2328 —Dot-shaped connecting portion. 
           
         
       
    
     DESCRIPTION OF EMBODIMENTS 
     To make the objectives, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings. 
     To facilitate understanding of a supporting structure of a foldable display apparatus provided in the embodiments of this application, the following first describes an application scenario of the supporting structure. The supporting structure of the foldable display apparatus is applied to a foldable mobile terminal, for example, a foldable mobile phone or a foldable ebook. When the mobile phone is folded, a flexible screen of the mobile terminal is also folded. To fold the flexible screen, the flexible screen includes two types of regions: planar regions and a bending region connecting two adjacent planar regions. The supporting structure of the foldable display apparatus includes planar supporting portions and a bending supporting portion. The planar supporting portions are opposite to the planar regions, and the bending supporting portion is opposite to the bending region. When the flexible screen is folded, the bending region of the flexible screen and the bending supporting portion that supports the bending region need to be folded together. When the flexible screen of the mobile phone is unfolded, the bending region of the flexible screen and the bending supporting portion that supports the bending region are also unfolded together. During folding and unfolding, the flexible screen and the bending supporting portion each have a specified thickness, and the bending supporting portion has an integral structure. As a result, specified relative displacement is generated between the flexible screen and the bending supporting portion in the bending region, and a risk of degumming likely occurs. Therefore, a supporting structure of the foldable display apparatus needs to be designed, to reduce a risk of degumming between the flexible screen and the bending supporting portion, and improve product quality. 
       FIG. 1  is a top view of a foldable display apparatus according to an embodiment of this application,  FIG. 2  is a schematic cross-sectional diagram of a foldable display apparatus according to an embodiment of this application,  FIG. 3  is a schematic diagram of a folded state of a foldable display apparatus according to an embodiment of this application, and  FIG. 4  is a schematic diagram of an unfolded state of a foldable display apparatus according to an embodiment of this application. The supporting structure of the foldable display apparatus in the embodiments of this application is applied to the foldable display apparatus shown in the figures. A supporting structure  2  is configured to support a flexible screen  1  of the foldable display apparatus. As shown in the figures, the foldable display apparatus includes the flexible screen  1  and the supporting structure  2 . The supporting structure  2  includes a bonding step  21 . The flexible screen  1  has a display panel  11  and a cover  12  that are stacked together. On an edge of the flexible screen  1 , the cover  12  extends from an edge of the display panel  11  by a specified distance, so that the cover  12  can be lapped and fastened to the bonding step  21  of the supporting structure  2 , to form a bonding region  13  located on the edge of the flexible screen  1 . The flexible screen  1  includes at least two planar regions  14  (that the flexible screen  1  includes two planar regions  14  is used as an example in the figures). There is a bending region  15  between any two adjacent planar regions  14 . When the foldable display apparatus is in a folded state and an unfolded state, the planar regions  14  remain flattened. When the foldable display apparatus is in the folded state, the bending region  15  is bent. When the foldable display apparatus is in the unfolded state, the bending region  15  is flattened. The foldable display apparatus has a bending supporting portion  23  corresponding to the bending region  15 . There is a flexible supporting bar on a side of the bending supporting portion that is close to the flexible screen. The flexible supporting bar is made of a flexible material, for example, rubber, and has specified flexibility. When the flexible screen is bent, the flexible supporting bar may be bent together with the flexible screen. 
     Referring to  FIG. 3  to  FIG. 5 ,  FIG. 5  is a schematic cross-sectional structural diagram of a bending supporting portion according to an embodiment of this application. The supporting structure  2  in this embodiment of this application includes planar supporting portions  22  and a bending supporting portion  23 . The planar supporting portions  22  are opposite to the planar regions  14  of the flexible screen  1 , and are configured to support the planar regions  14 . The bending supporting portion  23  is opposite to the bending region  15  of the flexible screen  1 , and is configured to support the bending region  15 . The bending supporting portion  23  includes a bending skeleton  231  and a flexible supporting bar  232  connected to the bending skeleton  231 , and the flexible supporting bar  232  is in contact with the flexible screen  1  to support the bending portion of the flexible screen  1 . Specifically, the flexible supporting bar  232  includes a supporting portion  2321  and a plurality of connecting portions  2322  that are distributed at intervals and fastened to the supporting portion  2321 . The supporting portion  2321  is in contact with the flexible screen  1 . The connecting portions  2322  are located on a side of the supporting portion  2321  away from the flexible screen  1 , an end of the connecting portion  2322  away from the supporting portion  2321  is connected to the bending skeleton  231 , and there is a specified interval between the plurality of connecting portions  2322 . In this embodiment, the end of the connecting portion  2322  away from the supporting portion  2321  is connected to the bending skeleton  231 , so that there is at least a specified distance from a joint between the connecting portion  2322  and the bending skeleton  231  to the supporting portion  2321 . The connecting portions  2322  are flexible connecting portions, and there is a specified interval between the plurality of connecting portions  2322 . Therefore, when the foldable display apparatus is folded, the flexible screen  1  bonded to the supporting portion  2321  and the supporting portion  2321  are bent together, and relative displacement is generated between the supporting portion  2321  and the bending skeleton  231 , so that no relative displacement is likely generated between the supporting portion  2321  and the flexible screen  1 . This improves strength of connection between the supporting portion  2321  and the flexible screen  1 , reduces a risk of degumming between the flexible screen  1  and the flexible supporting bar  232 , and improves product quality of the foldable display apparatus. 
     It should be noted that, in this embodiment of this application, description is provided by using an example in which the flexible screen has the planar regions and the bending region. Correspondingly, the supporting structure has the planar supporting portions and the bending supporting portion. This implementation is used only as a specific solution for implementing this embodiment of this application. The supporting structure in the technical solution of this application is applicable to all solutions in which the flexible screen has a bending region. The supporting structure correspondingly has the bending supporting portion. A structure of a part other than the bending region of the flexible screen is not limited, for example, the part may be a curved-surface region or in any shape or state, provided that the supporting structure is adapted to the structure. 
     In an optional embodiment, there are a plurality of manners in which the connecting portions  2322  are connected to the bending skeleton  231 . For example, the connecting portions  2322  may be clamped with the bending skeleton  231 , or may be fixedly connected to the bending skeleton  231 , and a structure of the connecting portion  2322  may be a clamping slot  2323 , or may be a fixed protrusion  2326 . As shown in  FIG. 5  to  FIG. 7 ,  FIG. 6  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application, and  FIG. 7  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application. In an optional embodiment, the connecting portions  2322  are clamped with the bending skeleton  231 , the connecting portions  2322  are clamping slots  2323 , the bending skeleton  231  includes clamping heads  2312 , and the clamping head  2312  extends into the clamping slot  2323  and is clamped with the clamping slot  2323 . In this embodiment, the connecting portion  2322  of the flexible supporting bar  232  is made of a flexible material. Therefore, the clamping slot  2323  is also a flexible clamping slot  2323 . The flexible clamping slot  2323  has a slot hole  2324 . There is a clamping wall  2325  on a side of the slot hole  2324  that is close to the bending skeleton  231 . The bending skeleton  231  has the clamping heads  2312 . The clamping head  2312  has a head  2313  and a clamping neck  2314 . A radial size of the head  2313  of the clamping head  2312  is greater than a radial size of the clamping neck  2314 , and the head  2313  of the clamping head  2312  is close to a side of the flexible supporting bar  232 . During mounting, the head  2313  of the clamping head  2312  passes through a region of the clamping wall  2325  of the clamping slot  2323 , and the clamping wall  2325  elastically expands, so that the head  2313  of the clamping head  2312  passes through the region of the clamping wall  2325  to enter the slot hole  2324  of the clamping slot  2323 . When the clamping neck  2314  is opposite to the clamping wall  2325 , the head  2313  of the clamping head  2312  is clamped with the clamping wall  2325  of the slot hole  2324 . In this way, when the foldable display apparatus is folded, the bending supporting portion  23  is bent, and the supporting portion  2321  of the flexible supporting bar  232  is connected to the bending bracket by using the clamping slot  2323  and the clamping head  2312 , so that the clamping slot  2323  deforms during bending. Therefore, the supporting portion  2321  and the flexible screen  1  fixedly connected to the supporting portion  2321  are bent simultaneously, and no relative displacement is likely generated between the supporting portion  2321  and the flexible screen  1 . In this way, this can improve strength of connection between the supporting portion  2321  and the flexible screen  1 , reduce a risk of degumming between the flexible screen  1  and the flexible supporting bar  232 , and improve product quality of the foldable display apparatus. 
     As shown in  FIG. 5  to  FIG. 7 , in the foregoing embodiment, cross-sectional shapes of the clamping head and the clamping slot are not specifically limited, and a structure for clamping between the clamping head and the clamping slot is not specifically limited, either. As shown in  FIG. 5 , in an embodiment, the cross-sectional shape of the clamping head is a rectangle, and the clamping head is clamped with the clamping slot in a planar manner. As shown in  FIG. 6 , in another embodiment, the cross-sectional shape of the clamping head is an ellipse, and the clamping head is clamped with the clamping slot in a curved-surface manner. In this embodiment, the clamping head has a region whose size gradually increases in a direction away from the bottom of the clamping slot, to facilitate mounting the clamping head to the clamping slot. As shown in  FIG. 7 , in still another specific embodiment, the cross-sectional shape of the clamping head is a triangle. In this embodiment, a size of the clamping head gradually increases in the direction away from the bottom of the clamping slot, to facilitate mounting. 
       FIG. 8  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application,  FIG. 9  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application, and  FIG. 10  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application. In another optional embodiment, the connecting portions  2322  may be fixed protrusions  2326 , and an end of the fixed protrusion  2326  away from the supporting portion  2321  is connected to the bending skeleton  231 . Therefore, there is a specified distance from the joint between the connecting portion  2322  and the bending skeleton  231  to the supporting portion  2321 . Within the distance, connection is performed by using the fixed protrusion  2326 . The fixed protrusion  2326  is flexible and has relatively high flexibility. In this way, when the foldable display apparatus is folded, the bending supporting portion  23  is bent, and the fixed protrusion  2326  is bent. Therefore, the supporting portion  2321  and the flexible screen  1  fixedly connected to the supporting portion  2321  are bent simultaneously, and no relative displacement is likely generated between the supporting portion  2321  and the flexible screen  1 . In this way, this can improve strength of connection between the supporting portion  2321  and the flexible screen  1 , reduce a risk of degumming between the flexible screen  1  and the flexible supporting bar  232 , and improve product quality of the foldable display apparatus. 
     Still referring to  FIG. 8 , in a specific embodiment of this application, the fixed protrusions  2326  may have fasteners, the bending skeleton  231  has bayonets  2315 , and the fasteners are in one-to-one adaptation with the bayonets  2315 , namely, the fasteners may be clamped with the bayonets  2315 . Specifically, the fastener is flexible. When the bending supporting portion  23  is mounted to the bending skeleton  231 , the fastener may be inserted into the bayonet  2315  of the bending skeleton  231 . The fastener may contract when passing through the bayonet  2315 . The fastener returns to an original shape after passing through the bayonet  2315 , and may be clamped with the bayonet  2315 , so that an end of the fixed protrusion  2326  away from the supporting portion  2321  is connected to the bending skeleton  231 . In this embodiment, mounting can be completed by inserting the bayonet  2315  of the fixed protrusion  2326  into the bayonet  2315  of the bending skeleton  231 . Therefore, a mounting process is relatively simple. 
     As shown in  FIG. 8  to  FIG. 10 , in the foregoing embodiment, cross-sectional shapes of the fastener and the bayonet are not specifically limited, and a structure for clamping between the fastener and the bayonet is not specifically limited, either. As shown in  FIG. 5 , in an embodiment, the cross-sectional shape of the fastener is a rectangle, and the fastener is clamped with the bayonet in a planar manner. As shown in  FIG. 6 , in another embodiment, the cross-sectional shape of the fastener is an ellipse, and the fastener is clamped with the bayonet in a curved-surface manner. In this embodiment, the fastener has a region whose size gradually increases in a direction away from the bottom of the bayonet, to facilitate mounting the fastener to the bayonet. As shown in  FIG. 7 , in still another specific embodiment, the cross-sectional shape of the fastener is a triangle. In this embodiment, a size of the fastener gradually increases in the direction away from the bottom of the bayonet, to facilitate mounting. 
     A manner for connection between the fastener and the bayonet  2315  further includes different implementation solutions. For example, a structure and a shape of the bayonet  2315  are not specifically limited. The bayonet  2315  may be a groove  2316 , or may be a through hole  2318 . Still referring to  FIG. 8 , in an optional embodiment, the bayonet  2315  is a groove  2316 . An opening of the groove  2316  has a clamping edge  2317 . The fastener may pass through the clamping edge  2317  and extends into the groove  2316 , and is clamped with the clamping edge  2317 . Specifically, the fastener is a flexible fastener. Therefore, when passing through the clamping edge  2317 , the fastener contracts to enter the groove  2316 , then returns to an original shape, and can be clamped with the clamping edge  2317 , to complete mounting. In this embodiment, the fastener is clamped with the groove  2316 . Therefore, specified displacement may alternatively occur at a joint between the fastener and the groove  2316 , to facilitate absorbing deformation of the bending supporting portion  23 , and the connection manner facilitates mounting. In addition, in this embodiment, the fastener is located in the groove  2316 . The groove  2316  may protect the fastener, and no friction or structural interference likely occurs between a remaining structure and the fastener. 
       FIG. 11  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application. In another optional embodiment, the bayonet  2315  is a through hole  2318 , the fastener passes through the through hole  2318 , and is then clamped with an edge of the through hole  2318 . In this embodiment, a process of mounting the fastener to the through hole  2318  is also relatively convenient, and specified displacement may alternatively occur at a joint between the fastener and the through hole  2318 , to facilitate absorbing deformation of the bending supporting portion  23 . In addition, in this embodiment, a structure of the through hole  2318  is relatively simple, to simplify a manufacturing process of the bending skeleton  231 , and reduce manufacturing costs of the bending skeleton  231 . 
       FIG. 12  is a schematic cross-sectional structural diagram of another bending supporting portion according to an embodiment of this application. In another implementation of this application, the fixed protrusion  2326  may alternatively be fixedly connected to the bending skeleton  231 . Specifically, the bending skeleton  231  may include mounting portions  2319  in one-to-one adaptation with the fixed protrusions  2326 . An end of the fixed protrusion  2326  away from the supporting portion  2321  is fastened to the mounting portion  2319 . In this embodiment, the end of the fixed protrusion  2326  away from the supporting portion  2321  is fixedly connected to the bending skeleton  231 . In this embodiment, a joint between the fixed protrusion  2326  and the bending skeleton  231  is connected to the supporting portion  2321  by using the flexible fixed protrusion  2326 , to absorb deformation of the bending supporting portion  23 . In this embodiment, strength of connection between the fixed protrusion  2326  and the bending skeleton  231  is relatively high. 
     Still referring to  FIG. 12 , in a specific embodiment, the mounting portion  2319  has a mounting hole  2320 , and the fixed protrusion  2326  passes through the mounting hole  2320  and is then fastened to the bending skeleton  231 . In this embodiment, the fixed protrusion  2326  passes through the mounting hole  2320 . Therefore, a hole wall of the mounting hole  2320  may protect the fixed protrusion  2326 , to improve a service life of the fixed protrusion  2326 . In addition, the hole wall of the mounting hole  2320  may limit the fixed protrusion  2326 , to prevent excessively large displacement from being generated between the fixed protrusion  2326  and the bending skeleton  231 , and improve strength of connection between the fixed protrusion  2326  and the bending skeleton  231 . 
     In a specific embodiment of this application, a manner for fixed connection between the fixed protrusion  2326  and the bending skeleton  231  is not limited. In a specific implementation, the fixed protrusion  2326  is bonded and fastened to the mounting portion  2319 . This connection manner has relatively low costs and a relatively simple process. In another specific implementation, the fixed protrusion  2326  is fastened to the mounting portion  2319  in a hot-melting manner. This connection manner has relatively high strength of fixed connection, and falling-off does not likely occur. 
     In an optional technical solution, a shape of the connecting portion is not limited. For example, the connecting portions may be bar-shaped connecting portions or dot-shaped connecting portions. The shape of the connecting portion may be selected based on an actual product requirement.  FIG. 13  is a schematic structural diagram of a supporting structure according to an embodiment of this application. In a specific embodiment, the connecting portions  2322  are bar-shaped connecting portions  2327 , a quantity of bar-shaped connecting portions  2327  required by the flexible supporting bar  232  is relatively small, and a structure of the flexible supporting bar  232  is relatively simple, so that the flexible supporting bar  232  has a simple manufacturing process and relatively low manufacturing costs. 
     Still referring to  FIG. 13 , in a specific embodiment, the flexible supporting bar  232  has a plurality of bar-shaped connecting portions  2327 , the bar-shaped connecting portions  2327  extend in an extension direction of the flexible supporting bar  232 , and the plurality of bar-shaped connecting portions  2327  are arranged in parallel. When the foldable display apparatus is folded, a folding direction is perpendicular to the extension direction of the flexible supporting bar  232 . Therefore, in this embodiment of this application, an extension direction of the bar-shaped connecting portion  2327  is perpendicular to the folding direction of the flexible supporting bar  232 , so that a folding line of the foldable display apparatus is parallel to a region between the bar-shaped connecting portions  2327 . In this way, when the foldable display apparatus is folded, the region between the parallel bar-shaped connecting portions  2327  can be drastically bent, to facilitate a bending operation. In addition, the bar-shaped connecting portions  2327  are not likely damaged. This improves a service life. As shown in  FIG. 13 , the extension direction of the flexible supporting bar  232  is a direction A, and the folding direction is a direction B. 
       FIG. 14  is a schematic structural diagram of another supporting structure according to an embodiment of this application. In a specific embodiment, when the connecting portions  2322  are dot-shaped connecting portions  2328 , the dot-shaped connecting portions  2328  are arranged in a matrix on the supporting portion  2321 . In an aspect, the plurality of dot-shaped connecting portions  2328  arranged in a matrix can provide a relatively reliable connection relationship. In another aspect, bar-shaped gaps may be formed between the dot-shaped connecting portions  2328  that are arranged in a matrix, to facilitate a folding operation on the foldable display apparatus. 
     In a specific embodiment, a cross-sectional shape of the dot-shaped connecting portion in a direction parallel to the flexible screen  1  may be a circle, a square, or a polygon, and a shape of the dot-shaped connecting portion is relatively regular, to facilitate manufacturing. 
     In this embodiment of this application, the flexible screen of the foldable display apparatus may include one bending region, or may include two or more bending regions. Correspondingly, the supporting structure of the foldable display apparatus may include only one bending supporting portion, or may include two or more bending supporting portions. Specifically, a quantity of bending regions included in the foldable display apparatus may be correspondingly the same as a quantity of included bending supporting portions, so that degumming does not likely occur between the flexible screen and the bending supporting portion of the foldable display apparatus. Therefore, strength of connection between the flexible screen and the bending supporting portion of the foldable display apparatus can be improved, and product quality of the foldable display apparatus is relatively good.  FIG. 15  is a schematic structural diagram of a foldable display apparatus according to an embodiment of this application. The flexible screen  1  of the foldable display apparatus shown in the figure includes three planar regions  14  and two bending regions  15 . 
     Referring to  FIG. 3  and  FIG. 16 ,  FIG. 16  is a schematic diagram of a folded state of another foldable display apparatus according to an embodiment of this application. According to a second aspect, this application further provides a foldable display apparatus, where the foldable display apparatus includes a flexible screen  1  and the supporting structure  2  of the foldable display apparatus in any one of the foregoing technical solutions. The supporting structure  2  includes a bending supporting portion  23  that supports a bending region  15  of the flexible screen  1 , and planar supporting portions  22  that support planar regions  14  of the flexible screen  1 . The bending supporting portion  23  includes a flexible supporting bar  232  and a bending skeleton  231 . The flexible supporting bar  232  includes a supporting portion  2321  and connecting portions fastened to a side of the supporting portion  2321  away from the flexible screen  1 . Distal ends of the connecting portions are fixedly connected to the bending skeleton  231 . Therefore, there may be space for relative movement between the flexible supporting bar  232  and the bending skeleton  231 . When the foldable display apparatus is bent, the flexible screen  1  may be stably connected to the supporting portion of the supporting bar, and degumming does not likely occur, so that product quality of the foldable display apparatus is relatively high. 
     In a specific implementation, a folding direction of the foregoing foldable display apparatus is not limited. As shown in  FIG. 16 , the foldable display apparatus may be folded in a direction towards the flexible screen  1 . To be specific, after being folded, the flexible screen  1  is located between supporting housings of the foldable display apparatus. Alternatively, as shown in  FIG. 3 , in another specific embodiment, the foldable display apparatus may be folded in a direction away from the flexible screen  1 . To be specific, after being folded, the flexible screen  1  is located on outer sides of supporting housings of the foldable display apparatus. 
     The foregoing descriptions are merely specific implementations of this application, but are not intended to limit the protection scope of this application. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in this application shall fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.