Display module, display device and mold

Abstract

The utility model discloses a display module, a display device and a mold. The display module comprises a display panel, the display panel is provided with a display side and a back side, the display side is opposite to the back side, the display panel comprises a display area, a bending area and a binding area, the bending area is connected with the display area and the binding area, the bending area is bent towards the back side of the display panel to form a curved surface, and the binding area is located on the back side of the display panel; a hole is formed in the bending area, and an opening in one end of the hole is located on the display side of the display panel; the cover plate covers the display side of the display panel, and the cover plate covers the display panel; the middle frame surrounds the periphery of the edge of the display panel and is in contact with the edge of the cover plate; the supporting and fixing structure is at least located between the curved surface and the middle frame, the supporting and fixing structure wraps at least part of the outer side, away from the display area of the display panel, of the curved surface, and the supporting and fixing structure covers an opening in one end of the hole.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure belongs to the technical field of display, and particularly relates to a display module, a display device and a mold. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display screens are widely concerned due to their advantages of self-luminous, low power consumption, thinness, flexibility, bright colors, high contrast, fast response rate and the like. SUMMARY

[0003] In a first aspect, the embodiments of the present disclosure provide a display module, comprising a display panel having a display side and a back side opposite to each other, the display panel comprising a display area, a bending area and a binding area, the bending area being connected to the display area and the binding area respectively, the bending area being bent into a curved surface towards the back side of the display panel, and the binding area being located on the back side of the display panel; the bending area is provided with a hole, one end of the hole being open on the display side of the display panel; a cover plate covering the display side of the display panel; a middle frame surrounding the periphery of the display panel and being in contact with the edge of the cover plate; a support fixing structure being located between the curved surface and the middle frame, and covering at least part of the outer side of the curved surface away from the display area of the display panel, the support fixing structure covering one end of the hole. In some embodiments, the hole comprises a through hole and / or a blind hole. In some embodiments, the number of holes is one, and one hole is located at the middle position of the bending area along the length direction thereof; or the number of holes is two, and two holes are arranged at intervals along the length direction of the bending area; or the number of holes is two, and two holes are arranged at intervals along the width direction of the bending area; or the number of holes is more than three, and more than three holes are arranged at intervals along the length direction of the bending area; the length direction of the bending area is parallel to the bending axis direction of the curved surface; and the width direction of the bending area is perpendicular to the bending axis direction of the curved surface. In some embodiments, the orthographic projection shape of the hole on the display panel comprises a circle, an ellipse, a rectangle or a polygon; the maximum radial dimension range of the orthographic projection of the hole on the display panel is 0.1-0.6 mm; or the maximum radial dimension range of the orthographic projection of the hole on the display panel is 0.1-0.3 mm; or the maximum radial dimension range of the orthographic projection of the hole on the display panel is 0.2-0.5 mm. In some embodiments, a first protective layer is further provided on the back side of the display panel, and the orthographic projection of the first protective layer on the display panel covers at least the bending area. In some embodiments, the hole penetrates through the first protective layer. In some embodiments, a second protective layer is further provided on the display side of the display panel, and the orthographic projection of the second protective layer on the display panel covers at least the bending area. In some embodiments, the hole penetrates through the second protective layer. In some embodiments, the support fixing structure comprises a fixing part and a first support part, the fixing part and the first support part being connected as a whole, the fixing part being located on the outer side of the curved surface and covering at least part of the outer side of the curved surface; and the first support part being embedded in the hole of the bending area of the display panel.In some embodiments, the display panel further comprises a back film and a support film located on the back side of the display panel, and the back film and the support film are stacked away from the display panel in sequence; the back film and the support film do not overlap with the bending area of the display panel in orthographic projection on the display panel; a gap is formed between the side end face of the back film and the support film close to the curved surface and the inner side of the curved surface close to the display area of the display panel, and the support fixing structure further comprises a second support part located in the gap on the inner side of the curved surface and in contact with the inner side of the curved surface. In some embodiments, the length direction of the support fixing structure is parallel to the length direction of the curved surface, the length direction of the curved surface is parallel to the bending axis direction of the curved surface, the length of the support fixing structure is greater than or equal to the length of the curved surface, and the fixing part covers the entire outer side of the curved surface; the second support part fills the entire gap. In some embodiments, the length direction of the support fixing structure is parallel to the length direction of the curved surface, the length direction of the curved surface is parallel to the bending axis direction of the curved surface, the length of the support fixing structure is less than the length of the curved surface, and the fixing part covers part of the area on the outer side of the curved surface; the second support part fills part of the gap. In some embodiments, the second support part and the first support part are connected as a whole. In some embodiments, the support fixing structure further comprises a conductive layer located on the side of the fixing part away from the curved surface, and the conductive layer covers at least part of the area on the side of the fixing part away from the curved surface; the cover plate comprises a substrate and an ink layer located on the side of the substrate close to the display panel, and the ink layer surrounds the four peripheral edges of the substrate; the conductive layer is in contact with the ink layer and the middle frame respectively. In some embodiments, the shapes of the contact parts of the support fixing structure and the middle frame are adapted to each other. In some embodiments, the area of the support fixing structure in contact with the middle frame is provided with a first protruding structure, the area of the middle frame in contact with the support fixing structure is provided with a first recessed structure, and the sizes and shapes of the first protruding structure and the first recessed structure are adapted to each other; and / or, the area of the support fixing structure in contact with the middle frame is provided with a second recessed structure, the area of the middle frame in contact with the support fixing structure is provided with a second protruding structure, and the sizes and shapes of the second recessed structure and the second protruding structure are adapted to each other. In some embodiments, the materials of the fixing part, the first support part and the second support part comprise thermoplastic organic polymer materials, and / or thermosetting organic polymer materials, and / or photopolymerizable organic polymer materials. In some embodiments, the display panel comprises a plurality of signal lines extending from the display area to the bending area, and the signal lines and the hole do not overlap in orthographic projection on the display panel.In some embodiments, the line width of at least part of the signal line located at the periphery of the hole in the bending area is smaller than the line width of the same signal line in the display area. In some embodiments, the path of at least part of the signal line located at the periphery of the hole in the bending area is a curved path that bends away from the hole. In some embodiments, the spacing between adjacent signal lines in at least part of the signal line located at the periphery of the hole in the bending area is not equal. In a second aspect, the embodiments of the present disclosure provide a display device, which comprises the display module described above. In a third aspect, the embodiments of the present disclosure provide a mold for injection molding the support and fixing structure in the display module described above, wherein the mold comprises an injection molding structure, the injection molding structure is configured to at least surround the periphery of the binding side bezel area of the display panel in the display module and is located at the back side of the display panel, in the binding side bezel area of the display panel, the bending area of the display panel bends to a curved surface at the back side thereof, the orthographic projection of the injection molding structure on the display panel covers at least part of the binding side bezel area, the injection molding structure is configured to be in contact with the back side of the display panel and the edge of the cover plate in the display module and forms a first sealing channel between the back side of the display panel and the cover plate, the side of the injection molding structure away from the display panel is provided with a first opening at a position corresponding to the hole in the bending area of the display panel, the first opening and the first sealing channel are communicated, and the orthographic projections of the first opening and the hole on the display panel at least partially overlap. In some embodiments, the length of the first sealing channel is greater than the length of the binding side bezel area, the length of the binding side bezel area is the length of the curved surface along the bending axis thereof, and the first sealing channel surrounds the entire binding side bezel area. In some embodiments, the length of the first sealing channel is smaller than or equal to the length of the binding side bezel area, the length of the binding side bezel area is the length of the curved surface along the bending axis thereof, and the first sealing channel corresponds to surrounds part of the binding side bezel area. In some embodiments, the number of the first openings is multiple, the multiple first openings are arranged at intervals along the length direction of the binding side bezel area, and the multiple first openings and the multiple holes in the bending area one-to-one correspond to each other, and the length direction of the binding side bezel area is the bending axis direction of the curved surface. In some embodiments, the orthographic projection shape of the first opening on the display module comprises a circle, an ellipse, a rectangle or a polygon, the maximum radial dimension range of the orthographic projection of the first opening on the display module is 0.1-0.6 mm, or the maximum radial dimension range of the orthographic projection of the first opening on the display module is 0.1-0.3 mm, or the maximum radial dimension range of the orthographic projection of the first opening on the display module is 0.2-0.5 mm.In some embodiments, a second opening is further provided on the side of the injection molding structure facing away from the display panel at a position corresponding to one end of the binding side frame area, and a third opening is further provided on the side of the injection molding structure facing away from the display panel at a position corresponding to the other end of the binding side frame area, the second opening and the third opening are respectively connected to the first sealing channel; the second opening, the third opening and the hole are not overlapped in their orthographic projections on the display panel. In some embodiments, the injection molding structure is further configured to surround the periphery of the non-binding side frame area of ​​the display panel, the orthographic projection of the injection molding structure on the display panel also covers the non-binding side frame area; the injection molding structure is further configured to contact the back side of the non-binding side frame area and the edge of the cover plate, and form a second sealing channel between the non-binding side frame area and the cover plate; the second sealing channel is connected to the first sealing channel; the injection molding structure is further provided with a fourth opening on the side of the injection molding structure facing away from the display panel at a connection position corresponding to the adjacent non-binding side frame area, and the fourth opening is connected to the second sealing channel. Beneficial effects of the embodiments of the present disclosure: The display module provided by the embodiments of the present disclosure, by providing a supporting and fixing structure at least between the curved surface and the middle frame, and making the supporting and fixing structure cover one end opening of the hole, can make part of the supporting and fixing structure be located between the curved surface and the middle frame, and part of it be embedded in the hole. Thus, on the one hand, a certain gap can be maintained between the curved surface and the middle frame, preventing the middle frame from causing damage to the curved surface by collision, extrusion, or compression during assembly and transportation; on the other hand, the supporting and fixing structure can support and fix the curved surface, and at the same time, it can buffer the extrusion force of the middle frame, preventing the bending area from being bumped and extruded by the middle frame, thereby ensuring the safety of the bending area bent into the curved surface and ensuring the reliability of the circuit routing in the bending area. The display device provided by the embodiments of the present disclosure, by adopting the above-mentioned display module, can ensure the quality of the display device. The mold provided by the embodiments of the present disclosure will apply pressure to the liquid adhesive during the injection molding process. Compared with the solution of preparing the supporting and fixing structure by printing process in the related art, the liquid adhesive in the injection molding process has a higher filling density and better resistance to damage. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and are not intended to limit the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed exemplary embodiments with reference to the accompanying drawings, in which: Figure 1a The figure is a schematic diagram of the assembly structure of the binding side frame area of ​​a display device in the related art. Figure 1b This is a schematic diagram of the assembly structure of the binding side frame area of ​​another display device in the related art. Figure 2a The figure is a schematic top view of the display side of a display module in a flattened state with a bent area of ​​a display panel according to an embodiment of the present disclosure.Figure 2b The figure is a schematic top view of the back side of a display panel bending area in a display module in a bent state according to an embodiment of the present disclosure. Figure 2c For the Figure 2b A structural cross-sectional view with the AA' cutting line in the figure. Figure 2d For the Figure 2b Another structural cross-sectional view of the AA' section line. Figure 2e FIG1 is a schematic top view of the display side of another display module in an embodiment of the present disclosure, wherein the bent region of the display panel is in a flattened state. Figure 2f FIG1 is a schematic top view of the display side of another display module in an embodiment of the present disclosure, wherein the bent region of the display panel is in a flattened state. Figure 2g FIG1 is a schematic top view of the display side of another display module in an embodiment of the present disclosure, wherein the bent region of the display panel is in a flattened state. Figure 3a For the Figure 2b Another structural cross-sectional view of the AA' section line. Figure 3b For the Figure 2b Another structural cross-sectional view of the AA' section line. Figure 3c For the Figure 2b Another structural cross-sectional view of the AA' section line. Figure 4a Schematic diagram of the supporting structure in the embodiment of the present disclosure. Figure 4b For the Figure 4a Structural cross-sectional view of the BB' section line. Figure 5a FIG1 is a schematic top view of the back side of another display module in a bent state of a display panel in a bent state according to an embodiment of the present disclosure. Figure 5b FIG1 is a schematic top view of the back side of a display panel bending area in a bent state in another embodiment of the present disclosure. Figure 5c For the Figure 5a CC' section line and Figure 5b A structural cross-sectional view of the DD' cutting line. Figure 5d For the Figure 5a CC' section line and Figure 5b Another structural cross-sectional view of the DD' section line. Figure 6a - Figure 6k For the Figure 5a CC' section line and Figure 5b Structural cross-sectional view of the DD' section line. Figure 7a - Figure 7b For the Figure 5a CC' section line and Figure 5b Structural cross-sectional view of the DD' section line. Figure 8a The figure is a schematic diagram of wiring within the bending area of ​​the display panel in the display module according to an embodiment of the present disclosure. Figure 8b This is another schematic diagram of wiring within the bending area of ​​the display panel in the display module according to an embodiment of the present disclosure. Figure 8cA schematic diagram of another wiring in a bending area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 8d A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 8c An enlarged schematic diagram of part G in the middle is shown in the embodiments of the present disclosure. Figure 9a A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 9b A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 9c A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 9d A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 9e A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 10a A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 10b A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 10c A schematic diagram of a structure in which a mold is installed in a binding side frame area of a display panel in a display module is shown in the embodiments of the present disclosure. Figure 11 A process diagram for preparing a support fixing structure by using a 3D printing process is shown in the embodiments of the present disclosure. To enable a person skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display module, a display device and a mold provided by the embodiments of the present disclosure are described in further detail below in combination with the drawings and specific embodiments. In the following, the embodiments shown will be described more fully with reference to the drawings, but the embodiments shown can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth in the present disclosure. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete, and to enable a person skilled in the art to fully understand the scope of the present disclosure. The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications of configurations formed based on manufacturing processes. Therefore, the regions illustrated in the drawings have a schematic property, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions, but are not intended to be limiting. At present, with the rapid development of the OLED display industry, a large number of new display devices are gradually flooding the market. In order to obtain a larger screen ratio and provide customers with a good visual experience, narrow frame has become a trend of display devices. In the related art, with reference to Figure 1a, which is a schematic diagram of the assembly structure of the binding side frame area of ​​a display device in the related art; the binding side frame area J1 (generally the lower frame) of the display panel 1 (flexible panel) in the display module is bent toward its back side and fixed to the back side of the display panel 1. During the assembly process of the entire machine 18 (i.e., the entire display device), the edge of the cover plate 3 set on the display side of the display panel 1 is assembled with the entire machine 18 (such as the middle frame). After assembly, a gap M of sufficient width (about 0.8 to 2 mm) must be reserved between the bending area K (i.e., the Pad Bending area) of the binding side frame area J1 of the display panel 1 and the entire machine 18 to ensure the safety of the bending area K, such as preventing the bending area K from being bumped or squeezed during assembly and transportation. In the related art, refer to Figure 1b , which is a schematic diagram of the assembly structure of the binding side frame area of ​​another display device in the related art; through the BNB (printing glue on the outside of the bending area) or BNB (printing glue on the outside of the bending area) + bending potting (side glue injection in the bending area) process, a regularly shaped glue frame 19 is formed in the gap between the bending area K of the display panel and the whole machine 18, which can improve the impact resistance of the bending area K, and the assembly with the whole machine 18 can reduce the distance between the edge of the bending area K of the display panel 1 and the edge of the cover plate 3, thereby achieving an extremely narrow frame (frame width reduction> 1mm). However, there is shrinkage of the glue in the bending potting (side glue injection in the bending area) process, and the inside of the bending area is not completely filled; and because the glue in the BNB process is different from the glue in the bending potting process, the two glues have poor fusion, resulting in poor impact resistance of the bending area. In order to solve the above problems in the related art, in the first aspect, the embodiment of the present disclosure provides a display module, with reference to Figure 2a 、 Figure 2b 、 Figure 2c and Figure 2d , Figure 2a This is a schematic top view of the display side of a display module in a flattened state with a bent area of ​​a display panel according to an embodiment of the present disclosure; Figure 2b This is a schematic top view of the back side of a display panel bending area in a bent state in a display module according to an embodiment of the present disclosure; Figure 2c For the Figure 2b A structural cross-sectional view with the AA' section line in the middle; Figure 2d For the Figure 2bAnother structural cross-sectional view of the middle AA' cutting line; wherein, the display panel 1 is included, having a display side A and a back side B, the display side A and the back side B are opposite, the display panel 1 includes a display area 100, a bending area 101 and a binding area 102, the bending area 101 is connected with the display area 100 and the binding area 102 respectively, the bending area 101 is bent into a curved surface C towards the back side B of the display panel 1, and the binding area 102 is located at the back side B of the display panel 1; the bending area 101 is provided with a hole D, one end of the hole D is opened at the display side A of the display panel 1; a cover plate 3 is covered on the display side A of the display panel 1, and the cover plate 3 covers the display panel 1; a middle frame 4 is surrounded around the edge of the display panel 1 and is in contact with the edge of the cover plate 3; a support fixing structure 2 is located at least between the curved surface C and the middle frame 4, and the support fixing structure 2 covers at least part of the area of the curved surface C away from the display area 100 of the display panel 1, and the support fixing structure 2 covers one end of the hole D. In the display panel 1, some circuit traces are extended from the display area 100 to the bending area 101, and then extended from the bending area 101 to the binding area 102, and the binding area 102 is bound and connected with the peripheral circuit board, so as to realize that the peripheral circuit board provides driving signals (such as data signals, control signals, power signals, etc.) to the display panel 1. In the embodiment, by arranging the support fixing structure 2 at least between the curved surface C and the middle frame 4, and making the support fixing structure 2 cover one end of the hole D, part of the support fixing structure 2 is located between the curved surface C and the middle frame 4, and part of the support fixing structure 2 is embedded into the hole D, so as to ensure that a certain gap is maintained between the curved surface C and the middle frame 4, and avoid that the middle frame 4 causes damage to the curved surface C by knocking and extrusion during assembly and transportation; on the other hand, the support fixing structure 2 can support and fix the curved surface C, and can buffer the extrusion force of the middle frame 4, so as to avoid that the bending area 101 is knocked and extruded by the middle frame 4, and then ensure the safety of the bending area 101 bent into the curved surface C, and ensure the reliability of the circuit traces in the bending area 101. In some embodiments, referring to Figure 2c and Figure 2d , the hole D includes a through hole and / or a blind hole. The through hole penetrates the thickness of the bending area 101 of the display panel 1. The depth of the blind hole is less than the thickness of the bending area 101 of the display panel 1. In some embodiments, referring to Figure 2a , the number of the hole D is one, and the hole D is located at the middle position of the bending area 101 along the length direction X. In some embodiments, referring to Figure 2e , it is another display side top view schematic diagram of the display panel bending area in the flat state in another display module of the embodiment of the present disclosure; the number of the hole D is two, and the two holes D are arranged at intervals along the length direction X of the bending area 101; or, referring to Figure 2f , it is another display side top view schematic diagram of the display panel bending area in the flat state in another display module of the embodiment of the present disclosure; the two holes D are arranged at intervals along the width direction Y of the bending area 101. In some embodiments, referring toFigure 2g , is a schematic top view of the display side of the display panel bending area in a flattened state in another embodiment of the display module of the present disclosure; the number of holes D is three or more, and the three or more holes D are arranged at intervals along the length direction X of the bending area 101. The length direction X of the bending area 101 is parallel to the bending axis P of the curved surface C; the width direction Y of the bending area 101 is perpendicular to the bending axis P of the curved surface C. In this embodiment, the provision of at least one blind hole or through hole can enable a part of the supporting and fixing structure 2 to be embedded therein, thereby providing good support and fixing for the bending area 101 of the display panel 1 bent into the curved surface C, thereby ensuring the safety of the bending area 101 bent into the curved surface C. In addition, the provision of at least one through-hole allows the injection molding or printing material to enter the inner side of the curved surface C near the display area 100 of the display panel 1 through the through-hole when the support and fixing structure 2 is formed by injection molding or 3D printing, thereby allowing the support and fixing structure 2 to support the inner side of the curved surface C, thereby further ensuring the safety of the bending area 101 bent into the curved surface C. In some embodiments, the orthographic projection shape of the hole D on the display panel 1 includes a circle, an ellipse, a rectangle, or a polygon; the maximum radial dimension of the orthographic projection of the hole D on the display panel 1 ranges from 0.1 to 0.6 mm; or, the maximum radial dimension of the orthographic projection of the hole D on the display panel 1 ranges from 0.1 to 0.3 mm; or, the maximum radial dimension of the orthographic projection of the hole D on the display panel 1 ranges from 0.2 to 0.5 mm. The maximum radial dimension range of the hole D can ensure that when the support and fixing structure 2 is formed by injection molding or 3D printing, the injection molding or printing material can smoothly enter the blind hole or smoothly enter the inner side of the curved surface C close to the display area 100 of the display panel 1 through the through hole, so that the support and fixing structure 2 can form a good support and fixation for the outer side or the inner and outer sides of the curved surface C, thereby ensuring the safety of the bending area 101 bent into the curved surface C. In some embodiments, refer to Figure 3a , for along Figure 2b Another structural cross-sectional view of the AA' section line; the display module also includes a first protective layer 5, which is located on the back side B of the display panel 1, and the orthographic projection of the first protective layer 5 on the display panel 1 covers at least the bending area 101. Among them, the first protective layer 5 can play a reinforcing role in the bending area 101, improve the bending force of the bending area 101, and avoid the circuit traces in the bending area 101 from being broken or damaged. The first protective layer 5 is made of organic adhesive. The first protective layer 5 can be prepared by forming an adhesive film by applying glue on the back side B of the bending area 101, or by attaching a photocurable monomer adhesive film to the back side B of the bending area 101, and then curing it by light (such as UV light, i.e., ultraviolet light). In some embodiments, refer to Figure 3b , for along Figure 2b Another structural cross-sectional view of the AA' section line; the hole D penetrates the first protective layer 5. That is, in this embodiment, the hole D is a through hole opened in the bending area 101. In some embodiments, refer toFigure 3c , for along Figure 2b Another structural cross-sectional view along the AA' section line; the display module also includes a second protective layer 6, which is located on the display side A of the display panel 1, and the orthographic projection of the second protective layer 6 on the display panel 1 covers at least the bending area 101. The second protective layer 6 can further reinforce the bending area 101, improve the bending force of the bending area 101, and prevent the circuit traces in the bending area 101 from being broken or damaged. The second protective layer 6 is made of an organic adhesive. The second protective layer 6 can be directly attached to the display side A of the bending area 101. In addition, the display module also includes a touch layer and a color filter layer (not shown in the figure), which are sequentially stacked on the display side A of the display panel 1, and the orthographic projections of the touch layer and the color filter layer on the display panel 1 cover the display area 100. The touch layer includes a first organic resin material layer, the color filter layer includes a second organic resin material layer, and the second protective layer 6 can also be extended from the first organic resin material layer or the second organic resin material layer to the bending area 101 and cover the bending area 101, thereby reinforcing the bending area 101. In some embodiments, refer to Figure 3c , hole D passes through the second protective layer 6. That is, in this embodiment, hole D is a through hole opened in the bending area 101. In some embodiments, refer to Figure 2c 、 Figure 2d 、 Figure 3a 、 Figure 4a and Figure 4b , Figure 4a This is a schematic structural diagram of the supporting and fixing structure in an embodiment of the present disclosure; Figure 4b For the Figure 4a The structural cross-sectional view of the BB' section line in the middle; the support fixing structure 2 includes a fixing portion 21 and a first supporting portion 22, which are connected as a whole. The fixing portion 21 is located outside the curved surface C and covers at least a portion of the area outside the curved surface C; the first supporting portion 22 is embedded in the hole D of the bending area 101 of the display panel 1. The first supporting portion 22 can support the outside of the bending area 101, and the fixing portion 21 can fix the outside of the bending area 101. In some embodiments, refer to Figure 5a , is a schematic top view of the back side of a display panel bending area in a bent state in another embodiment of the present disclosure; Figure 5b FIG1 is a schematic top view of the back side of a display panel bending area in a bent state in another embodiment of the present disclosure; Figure 5c For the Figure 5a CC' section line and Figure 5bA structural sectional view of the middle DD' section line; wherein the display module further comprises a back film 7 and a support film 8, located at the back side B of the display panel 1, and the back film 7 and the support film 8 are stacked away from the display panel 1 in turn; the orthographic projection of the back film 7 and the support film 8 on the display panel 1 does not overlap with the bending area 101 of the display panel 1; the side end face of the back film 7 and the support film 8 close to the curved surface C and the inner side of the curved surface C close to the display area 100 of the display panel 1 form a gap, and the support fixing structure 2 further comprises a second support part 23 located in the gap on the inner side of the curved surface C and in contact with the inner side of the curved surface C. Wherein, the second support part 23 can support and fix the inner side of the bending area 101 bent into the curved surface C, so as to further ensure the safety of the bending area 101 bent into the curved surface C. In some embodiments, referring to Figure 5a and Figure 5c , the length direction of the support fixing structure 2 is parallel to the length direction X of the curved surface C, the length direction X of the curved surface C is parallel to the bending axis direction P of the curved surface C, the length of the support fixing structure 2 is greater than or equal to the length of the curved surface C, and the fixed part 21 covers the entire outer side of the curved surface C; the second support part 23 fills the entire gap. In some embodiments, referring to Figure 5b and Figure 5c , wherein the length direction of the support fixing structure 2 is parallel to the length direction X of the curved surface C, the length direction X of the curved surface C is parallel to the bending axis direction P of the curved surface C, the length of the support fixing structure 2 is less than the length of the curved surface C, and the fixed part 21 covers part of the area outside the curved surface C; the second support part 23 fills part of the gap. In some embodiments, referring to Figure 5c , the second support part 23 and the first support part 22 are connected as a whole. In some embodiments, referring to Figure 5d , the second support part 23 and the first support part 22 are connected as a whole. In some embodiments, referring to Figure 5a , the second support part 23 and the first support part 22 are connected as a whole. In some embodiments, referring to Figure 5bAnother structural cross-sectional view of the middle DD' cross-section line; the support fixing structure 2 further comprises a conductive layer 24 located on the side of the fixing part 21 away from the curved surface C, and the conductive layer 24 covers at least part of the area on the side of the fixing part 21 away from the curved surface C; the cover plate 3 comprises a substrate 31 and an ink layer 32, the ink layer 32 is located on the side of the substrate 31 close to the display panel 1, and the ink layer 32 surrounds the four peripheral edges of the substrate 31; the conductive layer 24 is in contact with the ink layer 32 and the middle frame 4 respectively. Wherein, the conductive layer 24 can be conductive cloth or conductive adhesive material. The middle frame 4 is made of metal material, and the middle frame 4 is connected to the grounding end of the display module. The ink layer 32 can be made of conductive ink material. The setting of the conductive layer 24 can enhance the edge extrusion of the display module binding side frame, reduce the thickness of the binding side frame, on the other hand, the conductive layer 24 is in contact with the middle frame 4 and the ink layer 32, which can conduct the static electricity generated by the display module binding side frame to the grounding end, thereby improving the green screen phenomenon of the display module. In addition, the related art display module improves the green screen in the following way: an opaque conductive film layer is prepared in the display area by patterning process, which will increase the cost of the display module, and at the same time, the production capacity of the display module will also be reduced; in the embodiment, the conductive layer 24 can be directly attached to the side of the fixing part 21 away from the curved surface C, compared with the related art green screen improvement scheme, it can not only reduce the cost of the display module, but also improve the production capacity of the display module. Figure 6a - Figure 6k , for along Figure 5a , the middle CC' cross-section line and Figure 5b , the structural cross-sectional view of the middle DD' cross-section line; the shape of the contact part of the support fixing structure 2 and the middle frame 4 is matched. In this way, the support fixing structure 2 and the middle frame 4 can form a more firm fixation to the bending area 101 bent into the curved surface C, thereby further avoiding the damage of the bending area 101 caused by knocking and extrusion during the assembly and transportation of the display module. Figure 6a - Figure 6k , the area of the support fixing structure 2 in contact with the middle frame 4 is provided with a first protruding structure E1, the area of the middle frame 4 in contact with the support fixing structure 2 is provided with a first recess structure F1, and the size and shape of the first protruding structure E1 and the first recess structure F1 are matched; and / or, the area of the support fixing structure 2 in contact with the middle frame 4 is provided with a second recess structure E2, the area of the middle frame 4 in contact with the support fixing structure 2 is provided with a second protruding structure F2, and the size and shape of the second recess structure E2 and the second protruding structure F2 are matched. Figure 6g , Figure 6h and Figure 6i , the first protruding structure E1 and the second protruding structure F2 are micro-protruding structures, and the first recess structure F1 and the second recess structure E2 are micro-recess structures. Figure 7a and Figure 7b , for along Figure 5athe middle frame 4 and Figure 5b the structure sectional view of the middle frame 4 and Figure 7a the bending area 101 is not exposed at the position of the recessed portion E3. Refer to Figure 7b the bending area 101 is exposed at the position of the recessed portion E3. Refer to Figure 7a and Figure 7b the other area of the support fixing structure 2, except the recessed portion E3, is in contact with the middle frame 4. In some embodiments, refer to Figure 6a and Figure 6e the end of the middle frame 4 in contact with the cover plate 3 has a stepped structure matching the edge of the cover plate 3, the edge of the cover plate 3 is arranged on the stepped structure, and the stepped structure can support and fix the cover plate 3. In some embodiments, refer to Figure 6b , Figure 6d , Figure 6f , Figure 6g , Figure 6h , Figure 6i , Figure 6j and Figure 6k the cover plate 3 covers the support fixing structure 2 and the middle frame 4. In some embodiments, refer to Figure 7a and Figure 7b the end of the middle frame 4 in contact with the cover plate 3 is located outside the edge of the cover plate 3 and does not overlap with the cover plate 3. In some embodiments, refer to Figure 6k, an end of the middle frame 4 close to the cover plate 3 is provided with a sealing structure 9 between the cover plate 3, and the sealing structure 9 can also extend to between the support fixing structure 2 and the cover plate 3. The sealing structure 9 can prevent external water vapor from entering the display area 100 and the bending area 101 of the display panel 1, thereby avoiding the circuit traces in the display area 100 and the bending area 101 from being eroded by water vapor. In some embodiments, the display module further includes a polarizer 10 between the display panel 1 and the cover plate 3, and a normal projection of the polarizer 10 on the display panel 1 covers at least the display area 100. The polarizer 10 and the display panel 1 are bonded by an optical adhesive layer 11, and the polarizer 10 and the cover plate 3 are also bonded by the optical adhesive layer 11. In some embodiments, the support fixing structure 2 directly contacts the bending area 101. Further, a second protective layer can be provided between the bending area 101 and the support fixing structure 2, and the second protective layer can protect the circuit structure in the bending area 101. The second protective layer can extend to cover the optical adhesive layer 11 between the display panel 1 and the polarizer 10 and an edge of the polarizer 10 close to the bending area 101, thereby better preventing external water vapor from entering the display area 100 of the display panel 1. In some embodiments, the cover plate 3 can be a multi-film layer structure, and the cover plate 3 integrates the polarizer. For example, the cover plate 3 is formed by sequentially stacking a cover film, a first adhesive layer, the polarizer, and a second adhesive layer, and a material of the cover film can be polyimide or polyethylene terephthalate. For another example, the cover plate can also be formed by sequentially stacking an ultra-thin flexible glass plate, a first bonding layer, the polarizer, and a second bonding layer. In some embodiments, the display panel 1 and the cover plate 3 can not be provided with the polarizer, and a color film layer can be provided instead of the polarizer. In some embodiments, a material of the fixing portion 21, the first support portion 22, and the second support portion 23 includes a thermoplastic organic polymer material, and / or a thermosetting organic polymer material, and / or a light-curable organic polymer material. The thermosetting organic polymer material is, for example, an epoxy resin, a polyurethane, and / or other polymer materials. The light-curable organic polymer material is, for example, an ultraviolet light-curable organic polymer material. The support fixing structure 2 using the above-mentioned materials can not only support and fix the bending area 101, but also buffer the impact and extrusion force transmitted from the middle frame 4 and the cover plate 3, thereby avoiding damage to the circuit traces in the bending area 101. In some embodiments, referring to Figure 8a , a schematic diagram of a circuit trace in a bending area of a display panel in a display module according to an embodiment of the present disclosure; Figure 8b , another schematic diagram of a circuit trace in a bending area of a display panel in a display module according to an embodiment of the present disclosure; Figure 8c , still another schematic diagram of a circuit trace in a bending area of a display panel in a display module according to an embodiment of the present disclosure; Figure 8d , a schematic diagram of a circuit trace in a bending area of a display panel in a display module according to an embodiment of the present disclosure; Figure 8cThe enlarged schematic view of the middle G part; the display panel 1 includes a plurality of signal lines 12 extending from the display area 100 to the bending area 101, and the orthographic projection of the signal line 12 and the hole D on the display panel 1 does not overlap. In this way, the signal line 12 in the bending area 101 of the display panel 1 can avoid the hole D, thereby avoiding the breakage of the signal line 12 passing through the position of the hole D. In some embodiments, the signal line in the display area 100 of the display panel 1 adopts FIP (Fanout Interconnection Pattern) technology, that is, the signal line in the display area 100 is designed through a circuit structure, such as sharing the display area 100 wiring, borrowing the display area 100 wiring, and the like, thereby reducing the signal line wiring of the bending area 101 and / or other frame areas of the display module, integrating part of the signal line wiring of the bending area 101 and / or other frame areas in the display area 100, and thereby narrowing the frame width of the display module. In some embodiments, referring to Figure 8a , the line width of at least part of the signal line 12 around the hole D in the bending area 101 is smaller than the line width of the same signal line in the display area 100. That is, by reducing the line width of at least part of the signal line 12 avoiding the hole D in the bending area 101, the signal line 12 avoids the hole D. In some embodiments, referring to Figure 8b , the direction of at least part of the signal line 12 around the hole D in the bending area 101 is a curved direction away from the hole D. That is, by making the direction of at least part of the signal line 12 around the hole D a curved direction, the signal line 12 avoids the hole D. In some embodiments, referring to Figure 8c and Figure 8d , the spacing between adjacent signal lines 12 in at least part of the signal line 12 around the hole D in the bending area 101 is not equal. That is, by setting the spacing between at least part of the adjacent signal lines 12 around the hole D not to be equal, the signal line 12 avoids the hole D. The display module provided by the embodiments of the present disclosure can make part of the support and fixing structure located between the curved surface and the middle frame and part of the support and fixing structure embedded in the hole by at least setting a support and fixing structure between the curved surface and the middle frame and making the support and fixing structure cover one end opening of the hole, thereby on the one hand ensuring that a certain gap is maintained between the curved surface and the middle frame to avoid damage to the curved surface caused by the middle frame during assembly and transportation; on the other hand, the support and fixing structure can support and fix the curved surface, and can also buffer the extrusion force of the middle frame to avoid the bending area from being bumped and extruded by the middle frame, thereby ensuring the safety of the bending area bent into a curved surface and ensuring the reliability of the circuit wiring in the bending area. Secondly, the embodiments of the present disclosure also provide a display device including the display module in the above embodiments. By using the display module in the above embodiments, the quality of the display device can be ensured. Thirdly, the embodiments of the present disclosure also provide a mold for injection molding the support and fixing structure in the above display module.Figure 9a and Figure 9b , Figure 9a FIG. 13 is a structure side view schematic diagram of a mold mounted in a display module in a binding side frame area of a display panel according to an embodiment of the present disclosure; Figure 9b FIG. 13 is a structure side view schematic diagram of a mold mounted in a display module in a binding side frame area of a display panel according to an embodiment of the present disclosure; wherein the injection molding structure 13 is configured to at least surround the periphery of the binding side frame area J1 of the display panel 1 in the display module, and is located at the back side B of the display panel 1; in the binding side frame area J1 of the display panel 1, the bending area 101 of the display panel 1 is bent into a curved surface C towards the back side B; the orthographic projection of the injection molding structure 13 on the display panel 1 covers at least part of the binding side frame area J1; the injection molding structure 13 is configured to contact the back side B of the display panel 1 and the edge of the cover plate 3 in the display module, and form a first sealing channel 14 between the back side B of the display panel 1 and the cover plate 3; the side of the injection molding structure 13 away from the display panel 1 is provided with a first opening H1 at a position corresponding to the hole D in the bending area 101 of the display panel 1, the first opening H1 and the first sealing channel 14 are communicated, and the orthographic projection of the first opening H1 and the hole D on the display panel 1 at least partially overlaps. Wherein the injection molding structure 13 can contact the back side of the binding side frame area J1 of the display panel 1, or the back side of the area outside the binding side frame area J1 of the display panel 1. When the hole D is a blind hole, the liquid adhesive material injected from the first opening H1 on the injection molding structure 13 can enter the blind hole directly, and can also fill the first sealing channel 14, and the liquid adhesive material can form a support and fixing structure located in the blind hole and outside the curved surface C after solidification. When the hole D is a through hole, the liquid adhesive material injected from the first opening H1 on the injection molding structure 13 can enter the through hole, and pass through the through hole to the inside of the curved surface C, so as to further fill the gap inside the curved surface C, and can also fill the first sealing channel 14, and the liquid adhesive material can form a support and fixing structure located in the through hole and inside and outside the curved surface C after solidification. In the embodiment, the injection molding structure 13 of the mold exerts pressure on the liquid adhesive material during injection molding, and compared with the scheme of preparing a support and fixing structure by a printing process (such as BNB process) in the related art, the liquid adhesive material in the injection molding process has a larger filling density and better impact resistance. Figure 9b, the length of the first sealing channel 14 is greater than the length of the binding side frame area J1, the length of the binding side frame area J1 is the length of the curved surface C along its bending axis; the first sealing channel 14 surrounds the entire binding side frame area J1. In this way, when the hole D is a blind hole, the injection structure 13 can be formed by the first sealing channel 14 to form a fixed part covering the entire outer side of the curved surface C and a first supporting part embedded in the blind hole; at the same time, since the length of the first sealing channel 14 is greater than the length of the binding side frame area J1, the liquid adhesive material can also enter the inner side of the curved surface C through the two end positions of the first sealing channel 14 beyond the length of the binding side frame area J1, thereby forming a second supporting part that fills the entire inner side gap of the curved surface C. When the hole D is a through hole, the injection structure 13 can be formed by the first sealing channel 14 to form a fixed part covering the entire outer side of the curved surface C and a first supporting part embedded in the through hole; at the same time, the liquid adhesive material can also enter the inner side of the curved surface C through the two end positions of the first sealing channel 14 beyond the length of the binding side frame area J1 and the through hole, thereby forming a second supporting part that fills the entire inner side gap of the curved surface C. In some embodiments, referring to Figure 9cFIG. 8 is a front view of another structure of the mold installed in the binding side frame area of the display panel in the display module according to an embodiment of the present disclosure; wherein the length of the first sealing channel 14 is less than or equal to the length of the binding side frame area J1, and the length of the binding side frame area J1 is the length of the curved surface C along the bending axis thereof; the first sealing channel 14 corresponds to the partial area surrounding the binding side frame area J1. In this embodiment, for example, the binding side frame area J1 is bound to the peripheral circuit board 20, the length of the peripheral circuit board 20 (i.e. the dimension of the peripheral circuit board 20 parallel to the length direction of the binding side frame area J1) is less than the length of the binding side frame area J1, and the length of the first sealing channel 14 is less than the length of the peripheral circuit board 20. In this way, when the hole D is a blind hole, the injection structure 13 can form the fixed part covering the partial area outside the curved surface C and the first support part embedded in the blind hole through the first sealing channel 14; and the second support part cannot be formed in the gap inside the curved surface C. When the hole D is a through hole, the injection structure 13 can form the fixed part covering the partial area outside the curved surface C and the first support part embedded in the through hole through the first sealing channel 14; meanwhile, the liquid adhesive material can also enter the inside of the curved surface C through the through hole, thereby forming the second support part filling the partial gap inside the curved surface C. It should be noted that the first sealing channel 14 can be the actual space formed between the injection structure 13, the back side B of the display panel 1 and the cover plate 3, or the actual space capable of injecting the liquid adhesive material formed by applying vacuum in the actual space, for example, only part of the space between the injection structure 13, the back side B of the display panel 1 and the cover plate 3 can inject the liquid adhesive material after applying vacuum, and the other spaces that cannot inject the liquid adhesive material do not belong to the first sealing channel 14. In some embodiments, the number of first openings H1 is multiple, the multiple first openings H1 are arranged at intervals along the length direction X of the binding side frame area J1, and the multiple first openings H1 and the multiple holes D of the bending area 101 correspond one by one; and the length direction X of the binding side frame area J1 is the bending axis P of the curved surface. In some embodiments, the shape of the orthographic projection of the first opening H1 on the display module includes a circle, an ellipse, a rectangle or a polygon; the maximum radial dimension range of the orthographic projection of the first opening H1 on the display module is 0.1-0.6 mm; or the maximum radial dimension range of the orthographic projection of the first opening H1 on the display module is 0.1-0.3 mm; or the maximum radial dimension range of the orthographic projection of the first opening H1 on the display module is 0.2-0.5 mm.In some embodiments, the side of the injection molding structure 13 facing away from the display panel 1 is also provided with a second opening H2 at a position corresponding to one end of the bound side frame area J1, and a third opening H3 at a position corresponding to the other end of the bound side frame area J1. The second opening H2 and the third opening H3 are respectively communicated with the first sealing channel 14. The orthogonal projections of the second opening H2, the third opening H3 and the hole D on the display panel 1 do not overlap. One of the second opening H2 and the third opening H3 can be used as the glue injection inlet of the injection molding structure 13, and the other can be used as the exhaust port of the injection molding structure 13, which is communicated with the outside atmosphere. In order to inject the liquid glue material into the first sealing channel 14 from the glue injection inlet. During the injection molding process, the liquid glue material can be injected into the first sealing channel 14 through the glue injection inlet, and a vacuum can be applied at the exhaust port to achieve the injection of the liquid glue material into the first sealing channel 14 through the glue injection inlet. Figure 9d The injection molding line diagram of the glue injection structure in the mold of the embodiment of the present disclosure; wherein two first openings H1 are provided between the second opening H2 and the third opening H3 of the injection molding structure 13, and the second opening H2, the third opening H3 and the two first openings H1 are arranged at equal intervals along the length direction of the glue injection structure. Glue can be injected at the same time at the second opening H2, the third opening H3 and the two first openings H1. When injecting glue, the liquid glue material can flow to both sides of each first opening H1 after being injected into the first sealing channel 14, that is, each first opening H1 is equivalent to increasing two glue injection channels. Using the glue injection scheme as shown in Figure 9d The glue injection channel can be increased from two (Figures ① and ⑥) before the first opening H1 is not opened (only the second opening H2 and the third opening H3 are opened) to six (Figures ①, ②, ③, ④, ⑤ and ⑥) after the first opening H1 is opened. The maximum glue channel length is reduced from L before the first opening H1 is not opened to L / 3 after the first opening H1 is opened. The reduction of the glue channel length can effectively reduce the pressure required for glue injection, thereby improving or solving the problem of difficult glue injection inside the curved surface C. In some embodiments, refer to Figure 9e Another structure front view schematic diagram of the mold installed in the bound side frame area of the display panel in the display module in the embodiment of the present disclosure; when the mold uses a non-vacuum glue injection process, an exhaust port needs to be reserved. The glue injection scheme of the mold in the related art can only open an opening at one end of the injection molding structure for glue injection, and open an opening at the other end for exhaust. In this embodiment, a first opening H1 is opened at the middle position of the injection molding structure 13 corresponding to the bound side frame area J1 of the display panel 1. The first opening H1 can be used as a glue injection inlet or an exhaust port. The radial size of the exhaust port can be smaller than the radial size of the glue injection inlet, such as the radial size of the exhaust port is only 0.1 mm, and the radial size of the glue injection inlet is about 0.25 mm. Refer to Figure 9eFive first openings H1 are formed in the middle of the injection molding structure 13 corresponding to the binding side frame area J1 of the display panel 1, of which the second and fourth are glue injection openings, and the first, third and fifth are exhaust openings. Figure 9e The second opening H2 and the third opening H3 are respectively formed at the two ends of the injection molding structure 13 corresponding to the binding side frame area J1 of the display panel 1, and the five first openings H1 are located between the second opening H2 and the third opening H3, which equally divide the distance between the second opening H2 and the third opening H3. The second opening H2 and the third opening H3 are both glue injection openings, so the glue injection path of the injection molding structure 13 can be increased from one in the related technical solution (i.e., only the second opening and the third opening are respectively formed at the two ends of the injection molding structure, the second opening is a glue injection opening, and the third opening is an exhaust opening) to six in the embodiment, and the maximum glue injection path length of the injection molding structure in the embodiment is reduced to 10mm from 60mm in the related technical solution. In some embodiments, refer to Figure 10a , Figure 10b and Figure 10c , Figure 10a is a top view schematic diagram of the structure of a mold in an embodiment of the present disclosure, Figure 10b is a top view schematic diagram of the structure of another mold in an embodiment of the present disclosure; Figure 10c is a side view schematic diagram of the structure of the mold in an embodiment of the present disclosure, which is installed in the non-binding side frame area of the display panel in the display module; wherein the injection molding structure 13 is also configured to surround the non-binding side frame area J2 of the display panel 1, and the orthographic projection of the injection molding structure 13 on the display panel 1 also covers the non-binding side frame area J2; the injection molding structure 13 is also configured to contact the back side of the non-binding side frame area J2 and the edge of the cover plate 3, and form a second sealing channel 15 between the non-binding side frame area J2 and the cover plate 3; the second sealing channel 15 and the first sealing channel 14 are communicated; the side of the injection molding structure 13 away from the display panel 1 is also provided with a fourth opening H4 at the connection position corresponding to the adjacent non-binding side frame area J2, and the fourth opening H4 is communicated with the second sealing channel 15. In some embodiments, refer to Figure 10a , the second opening H2 formed in the side of the injection molding structure 13 away from the display panel 1 at the connection position corresponding to the adjacent binding side frame area J1 and non-binding side frame area J2 is a glue injection opening, and the fourth opening H4 formed in the side of the injection molding structure 13 away from the display panel 1 at the connection position corresponding to the adjacent non-binding side frame area J2 is an exhaust opening, and the second opening H2 and the fourth opening H4 are located at the diagonal positions of the display panel 1. In some embodiments, refer to Figure 10b, fourth opening H4 can be opened two, injection structure 13 is provided with second opening H2 at the left end connection position corresponding to the binding side frame area J1 and the non-binding side frame area J2, injection structure 13 is provided with third opening H3 at the right end connection position corresponding to the binding side frame area J1 and the non-binding side frame area J2;Second opening H2 and one fourth opening H4 are located at a pair of corner positions of display panel 1, and one of them is used as glue injection inlet, and the other is used as exhaust port;Third opening H3 and the other fourth opening H4 are located at another pair of corner positions of display panel 1, and one of them is used as glue injection inlet, and the other is used as exhaust port;For example, the fourth opening H4 at the upper left corner is used as glue injection inlet, the third opening H3 at the lower right corner is used as exhaust port, the fourth opening H4 at the upper right corner is used as exhaust port, and the second opening H2 at the lower left corner is used as glue injection inlet.In addition, it should be pointed out that the first sealing channel 14 and the second sealing channel 15 are communicated to form a glue injection channel around the frame area of the display panel 1, and when the support fixing structure for supporting and fixing the edges of the display panel 1 around is formed by injection through the injection structure 13, a vacuum can be applied at any opening of the injection structure 13, so that the support fixing structure with the required shape is formed in the first sealing channel 14 and the second sealing channel 15.Thirdly, the display module preparation method of the above-mentioned embodiments is also provided, wherein step S1 includes preparing a display panel.The display panel has a display side and a back side, the display side and the back side are opposite, the display panel includes a display area, a bending area and a binding area, the bending area is connected with the display area and the binding area respectively, the bending area is bent into a curved surface towards the back side of the display panel, and the binding area is located on the back side of the display panel.The bending area is provided with a hole, and one end opening of the hole is located on the display side of the display panel.Step S2: a cover plate is attached to the display side of the display panel, wherein the cover plate covers the display panel.The method further includes step S3: using the injection mold of the above-mentioned embodiments to form the support fixing structure, or using a 3D printing process to prepare the support fixing structure.In this step, after the support fixing structure is formed by injection mold, the mold is removed from the back side of the display panel, and then subsequent process steps are performed.Step S4: installing a middle frame, wherein the support fixing structure is located at least between the curved surface and the middle frame, and the support fixing structure covers at least part of the outer side of the curved surface away from the display area of the display panel, and the support fixing structure covers one end opening of the hole.In some embodiments, when the bending area of the display panel is provided with a blind hole, or when the bending area of the display panel is provided with a through hole, and the first protective layer arranged on the inner side of the curved surface formed by the bending of the bending area blocks the one end opening of the through hole located on the inner side of the curved surface, and at the same time when the length of the first sealing channel in the injection structure of the mold is less than or equal to the length of the binding side frame area (i.e. the curved surface formed by the bending of the bending area) of the display panel, the first support part embedded in the blind hole and the fixing part covering part of the outer side of the curved surface can be formed by the injection mold;and the second support part cannot be formed in the gap on the inner side of the curved surface.In some embodiments, when a blind hole is provided in the bending area of ​​the display panel, or when a through hole is provided in the bending area of ​​the display panel, and a first protective layer provided on the inner side of the curved surface formed by the bending of the bending area blocks the opening of one end of the through hole located on the inner side of the curved surface, and at the same time, when the length of the first sealing channel in the injection molding structure of the mold is greater than the length of the binding side frame area of ​​the display panel (that is, the curved surface formed by the bending area), the mold can be injection molded to form a fixing portion covering the entire outer side of the curved surface and a first supporting portion embedded in the blind hole; at the same time, a second supporting portion filling the entire inner gap of the curved surface can also be injection molded on the inner side of the curved surface. In some embodiments, when a through hole is provided in the bending area of ​​the display panel, and an opening is also provided in the first protective layer arranged on the inner side of the curved surface formed by the bending area and / or the second protective layer arranged on the outer side of the curved surface at the position corresponding to the through hole, and at the same time, when the length of the first sealing channel in the injection molding structure of the mold is greater than or equal to the length of the binding side frame area of ​​the display panel (i.e., the curved surface formed by the bending area), the injection molding adhesive can, on the one hand, flow between the outer side and the inner side of the curved surface through the through hole and the openings in the first protective layer and / or the second protective layer, and on the other hand, can also enter the inner side of the curved surface through the two end positions of the first sealing channel that exceed the length of the binding side frame area, so that the mold can be used to injection mold a fixing portion covering the entire outer side of the curved surface and a first supporting portion embedded in the through hole; at the same time, a second supporting portion filling the entire inner gap of the curved surface can also be injection molded on the inner side of the curved surface. In some embodiments, when a through hole is provided in the bending area of ​​the display panel, and an opening is also provided in the first protective layer disposed on the inner side of the curved surface formed by the bending of the bending area and / or the second protective layer disposed on the outer side of the curved surface at a position corresponding to the through hole, and at the same time, when the length of the first sealing channel in the injection molding structure of the mold is less than the length of the display panel binding side frame area (i.e., the curved surface formed by the bending of the bending area), the injection molding adhesive can flow between the outer side and the inner side of the curved surface through the through hole and the openings in the first protective layer and / or the second protective layer, thereby enabling the mold to injection mold a fixing portion covering a portion of the outer side of the curved surface and a first supporting portion embedded in the through hole; and simultaneously, a second supporting portion filling the gap inside the curved surface can be injection molded on the inner side of the curved surface. In some embodiments, the first protective layer located on the back side of the bending area of ​​the display panel can be prepared by a process of forming an adhesive film by dispensing glue on the back side of the bending area, or by laminating a photocurable monomer adhesive film (i.e., adhesive film monomer material) to the back side of the bending area and then curing it by light (e.g., UV light, i.e., ultraviolet light). The first protective layer may or may not have an opening at the location corresponding to the through hole in the bending area. In some embodiments, the second protective layer may have an opening at the location corresponding to the opening in the bending area, or the second protective layer may be removed after the bending area is bent toward the back side of the display panel, and then the supporting and fixing structure is prepared to form a first supporting portion embedded in the hole in the bending area. In some embodiments, when the supporting and fixing structure is prepared using a 3D printing process, reference is made. Figure 11Fig. 6 is a process diagram of a process of preparing the support fixing structure by using a 3D printing process in the embodiments of the present disclosure. First, a dam 16 is printed on the back side of the binding side frame area J1 of the display panel 1 and the edge of the cover plate 3 close to the display panel 1 by using a high-viscosity material. The dam 16 and the curved surface C formed by the bending area 101 in the binding side frame area J1 form a gap. Then, a low-viscosity liquid adhesive material 17 is used to fill the gap between the dam 16 and the curved surface C. Finally, the liquid adhesive material 17 is cured (such as photocuring or thermal curing). In some embodiments, the dam can be formed by multi-layer printing, which means that the thickness of the dam gradually increases, and the dam is formed by stacking multiple printed film layers in the vertical direction. The dam can also be formed by multi-column printing, which means that the width of the dam gradually increases, and the dam is formed by stacking multiple printed film layers in the horizontal direction. In this embodiment, the process of forming the support fixing structure by using a mold injection process can apply pressure to the liquid adhesive material forming the support fixing structure, so that the filling density of the liquid adhesive material is larger and the impact resistance is better. The display device provided by the embodiments of the present disclosure can be an OLED panel, an OLED television, an OLED billboard, a display, a mobile phone, a navigator, or any product or component with display function. It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered within the protection scope of the present disclosure.

Claims

1. A display module, characterized by The display panel comprises a display side and a back side opposite to each other, and comprises a display area, a bending area and a binding area, the bending area is connected with the display area and the binding area respectively, the bending area is bent into a curved surface towards the back side of the display panel, and the binding area is located on the back side of the display panel. A cover plate is arranged on the display side of the display panel, and covers the display panel. A middle frame is arranged around the edge of the display panel and in contact with the edge of the cover plate.

2. The display module of claim 1, wherein, A support fixing structure is arranged between the curved surface and the middle frame, and covers at least part of the outer side of the curved surface away from the display area of the display panel.

3. The display module of claim 2, wherein, The hole comprises a through hole and / or a blind hole.

4. The display module of any one of claims 1-3, wherein, The number of holes is one, and one hole is located at the middle position of the bending area along the length direction thereof; or the number of holes is two, and two holes are arranged at intervals along the length direction of the bending area; or the number of holes is three or more, and three or more holes are arranged at intervals along the length direction of the bending area; the length direction of the bending area is parallel to the bending axis direction of the curved surface; and the width direction of the bending area is perpendicular to the bending axis direction of the curved surface.

5. The display module of claim 1, wherein, The shape of the hole in the orthographic projection on the display panel comprises a circle, an ellipse or a polygon; the maximum radial dimension of the orthographic projection of the hole on the display panel ranges from 0.1 mm to 0.6 mm; or the maximum radial dimension of the orthographic projection of the hole on the display panel ranges from 0.1 mm to 0.3 mm; or the maximum radial dimension of the orthographic projection of the hole on the display panel ranges from 0.2 mm to 0.5 mm.

6. The display module of claim 5, wherein, A first protective layer is arranged on the back side of the display panel, and the orthographic projection of the first protective layer on the display panel covers at least the bending area.

7. The display module of claim 1, wherein, The hole penetrates the first protective layer.

8. The display module of claim 7, wherein, A second protective layer is arranged on the display side of the display panel, and the orthographic projection of the second protective layer on the display panel covers at least the bending area.

9. The display module of any of claims 1-3, 5-8, wherein, The hole penetrates the second protective layer. The support fixing structure comprises a fixing part and a first support part, the fixing part and the first support part are connected as a whole, and the fixing part is located on the outer side of the curved surface and covers at least part of the outer side of the curved surface. The first support part is embedded in the hole of the bending area of the display panel.

10. The display module of claim 9, wherein, The display module further comprises a back film and a supporting film located at the back side of the display panel, and the back film and the supporting film are stacked away from the display panel in sequence; the normal projection of the back film and the supporting film on the display panel does not overlap with the bending area of the display panel; the side end face of the back film and the supporting film close to the curved surface and the inner side of the curved surface close to the display area of the display panel form a gap; the supporting fixing structure further comprises a second supporting part located in the gap on the inner side of the curved surface and in contact with the inner side of the curved surface.

11. The display module of claim 10, wherein, The length direction of the supporting fixing structure is parallel to the length direction of the curved surface, the length direction of the curved surface is parallel to the bending axis direction of the curved surface, the length of the supporting fixing structure is greater than or equal to the length of the curved surface, and the fixing part covers the entire outer side of the curved surface; the second supporting part fills the entire gap.

12. The display module of claim 10, wherein, The length direction of the supporting fixing structure is parallel to the length direction of the curved surface, the length direction of the curved surface is parallel to the bending axis direction of the curved surface, the length of the supporting fixing structure is less than the length of the curved surface, and the fixing part covers part of the area of the outer side of the curved surface; the second supporting part fills part of the gap.

13. The display module of claim 11 or 12, wherein, The second supporting part and the first supporting part are connected as a whole.

14. The display module of claim 9, wherein, The supporting fixing structure further comprises a conductive layer located on the side of the fixing part away from the curved surface, and the conductive layer covers at least part of the area of the side of the fixing part away from the curved surface; the cover plate comprises a substrate and an ink layer, the ink layer is located on the side of the substrate close to the display panel, and the ink layer surrounds the four peripheral edges of the substrate; The conductive layer is in contact with the ink layer and the middle frame respectively.

15. The display module of claim 14, wherein, The shapes of the contact parts of the supporting fixing structure and the middle frame are matched.

16. The display module of claim 15, wherein, The area of the supporting fixing structure in contact with the middle frame is provided with a first protruding structure, the area of the middle frame in contact with the supporting fixing structure is provided with a first recessed structure, and the sizes and shapes of the first protruding structure and the first recessed structure are matched; And / or, the area of the supporting fixing structure in contact with the middle frame is provided with a second recessed structure, the area of the middle frame in contact with the supporting fixing structure is provided with a second protruding structure, and the sizes and shapes of the second recessed structure and the second protruding structure are matched.

17. The display module of claim 1, wherein, The display panel comprises a plurality of signal lines, the plurality of signal lines extend from the display area to the bending area, and the normal projection of the signal lines and the hole on the display panel does not overlap.

18. The display module of claim 17, wherein, The line width of at least part of the signal lines in the periphery of the hole in the bending area is less than the line width of the same signal lines in the display area.

19. The display module of claim 17, wherein, At least part of the signal lines in the periphery of the hole in the bending area has a curved line direction bending away from the hole.

20. The display module of claim 17, wherein, The spacing between adjacent signal lines of at least part of the signal lines in the periphery of the hole in the bending area is not equal.

21. A display device comprising: The display module comprises any one of claims 1-20.

22. A mold for injection molding a supporting and fixing structure in a display module according to any one of claims 1 to 20, characterized in that: The injection molding structure is configured to at least surround a binding side frame area of a display panel in the display module and is located at the back side of the display panel; a bending area of the display panel is bent into a curved surface at the back side of the binding side frame area of the display panel; the orthographic projection of the injection molding structure on the display panel covers at least part of the binding side frame area; the injection molding structure is configured to be in contact with the back side of the display panel and the edge of a cover plate in the display module and forms a first sealing channel between the back side of the display panel and the cover plate; a first opening is formed on the side of the injection molding structure away from the display panel at a position corresponding to a hole in the bending area of the display panel, the first opening and the first sealing channel are communicated, and the orthographic projection of the first opening and the hole on the display panel at least partially overlaps.

23. The mold of claim 22, wherein, The length of the first sealing channel is greater than the length of the binding side frame area, and the length of the binding side frame area is the length of the curved surface along the bending axis; the first sealing channel surrounds the entire binding side frame area.

24. The mold of claim 22, wherein, The length of the first sealing channel is less than or equal to the length of the binding side frame area, and the length of the binding side frame area is the length of the curved surface along the bending axis; the first sealing channel corresponds to the part of the binding side frame area.

25. The mold of claim 22, wherein, The number of the first openings is multiple, multiple first openings are arranged in the length direction of the binding side frame area, and multiple first openings and multiple holes in the bending area one-to-one correspond; the length direction of the binding side frame area is the bending axis direction of the curved surface.

26. The mold of claim 22, wherein The orthographic projection shape of the first opening on the display module includes a circle, an ellipse or a polygon; the maximum radial dimension range of the orthographic projection of the first opening on the display module is 0.1-0.6 mm; or, the maximum radial dimension range of the orthographic projection of the first opening on the display module is 0.1-0.3 mm; or, the maximum radial dimension range of the orthographic projection of the first opening on the display module is 0.2-0.5 mm.

27. The mold of claim 22, wherein The side of the injection molding structure away from the display panel is further provided with a second opening at a position corresponding to one end of the binding side frame area, and the side of the injection molding structure away from the display panel is further provided with a third opening at a position corresponding to the other end of the binding side frame area, the second opening and the third opening are respectively communicated with the first sealing channel; the orthographic projection of the second opening, the third opening and the hole on the display panel does not overlap.

28. The mold of claim 22, wherein, The injection molding structure is also configured to be wrapped around a non-bound side frame area of the display panel, a normal projection of the injection molding structure on the display panel also covers the non-bound side frame area; the injection molding structure is also configured to be in contact with a back side of the non-bound side frame area and an edge of the cover plate, and a second sealing channel is formed between the non-bound side frame area and the cover plate; the second sealing channel and the first sealing channel are communicated; a fourth opening is also formed in a side of the injection molding structure away from the display panel at a connection position corresponding to the adjacent non-bound side frame area, and the fourth opening is communicated with the second sealing channel.

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