Display module, preparation method thereof, display device and mold

Abstract

A display module, a preparation method thereof, a display device and a mold. The display module comprises 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 with 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 is covered on the display side of the display panel, the cover plate covering the display panel; a middle frame is surrounded on the periphery of the edge of the display panel and is in contact with the edge of the cover plate; a 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 area on the outer side of the curved surface away from the display area of the display panel, and the support fixing structure covers one end of the hole.

Description

Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display module, its manufacturing method, display device, and mold. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-illumination, low power consumption, thinness, flexibility, vibrant colors, high contrast, and fast response speed. Summary of the Invention

[0003] In a first aspect, embodiments of this disclosure provide a display module, comprising a display panel having a display side and a back side, wherein the display side and the back side are opposite to each other.

[0004] The display panel includes a display area, a bending area, and a bonding area. The bending area is connected to the display area and the bonding area respectively. The bending area is bent into a curved surface towards the back side of the display panel. The bonding area is located on the back side of the display panel.

[0005] The bending area has a hole, and one end of the hole is located on the display side of the display panel;

[0006] A cover plate that fits onto the display side of the display panel, the cover plate covering the display panel;

[0007] The middle frame surrounds the periphery of the edge of the display panel and contacts the edge of the cover plate;

[0008] A supporting and fixing structure is located at least between the curved surface and the middle frame, and the supporting and fixing structure covers at least a portion of the curved surface on the outer side away from the display area of ​​the display panel.

[0009] The supporting and fixing structure covers one end opening of the hole.

[0010] In some embodiments, the hole includes a through hole and / or a blind hole.

[0011] In some embodiments, the number of holes is one, and one hole is located at the middle position of the bending area along its length direction;

[0012] Alternatively, the number of holes is two, and the two holes are arranged at intervals along the length direction of the bending area; or, the two holes are arranged at intervals along the width direction of the bending area.

[0013] Alternatively, the number of holes is three or more, and the three or more holes are arranged at intervals along the length of the bending area;

[0014] The length direction of the bending zone is parallel to the bending axis of the curved surface;

[0015] The width of the bending zone is perpendicular to the bending axis of the curved surface.

[0016] In some embodiments, the orthographic projection shape of the hole on the display panel includes a circle, an ellipse, a rectangle, or a polygon;

[0017] The maximum radial dimension of the hole projected onto the display panel ranges from 0.1 to 0.6 mm.

[0018] Alternatively, the maximum radial dimension of the hole projected onto the display panel ranges from 0.1 to 0.3 mm;

[0019] Alternatively, the maximum radial dimension of the hole projected onto the display panel ranges from 0.2 to 0.5 mm.

[0020] In some embodiments, a first protective layer is further included, located on the back side of the display panel.

[0021] The orthographic projection of the first protective layer onto the display panel at least covers the bending area.

[0022] In some embodiments, the hole penetrates the first protective layer.

[0023] In some embodiments, a second protective layer is further included, located on the display side of the display panel.

[0024] The second protective layer's orthographic projection on the display panel at least covers the bending area.

[0025] In some embodiments, the hole penetrates the second protective layer.

[0026] In some embodiments, the support and fixing structure includes a fixing part and a first supporting part, wherein the fixing part and the first supporting part are connected as a single unit.

[0027] The fixing part is located on the outside of the curved surface and covers at least a portion of the outer area of ​​the curved surface;

[0028] The first support portion is embedded in the hole in the bending area of ​​the display panel.

[0029] In some embodiments, a back film and a support film are also included, located on the back side of the display panel, and the back film and the support film are stacked sequentially away from the display panel;

[0030] The orthographic projections of the back film and the support film onto the display panel do not overlap with the bending area of ​​the display panel;

[0031] The back film and the support film form a gap between the end face of the back film and the side of the support film near the curved surface and the inner side of the curved surface near the display area of ​​the display panel.

[0032] The supporting and fixing structure further includes a second supporting part, which is located in the gap inside the curved surface and contacts the inside of the curved surface.

[0033] In some embodiments, the length direction of the supporting and fixing structure is parallel to the length direction of the curved surface.

[0034] The length direction of the curved surface is parallel to the bending axis of the curved surface.

[0035] The length of the supporting and fixing structure is greater than or equal to the length of the curved surface.

[0036] The fixing part covers the entire outer side of the curved surface;

[0037] The second support fills the entire gap.

[0038] In some embodiments, the length direction of the supporting and fixing structure is parallel to the length direction of the curved surface.

[0039] The length direction of the curved surface is parallel to the bending axis of the curved surface.

[0040] The length of the supporting and fixing structure is less than the length of the curved surface.

[0041] The fixing part covers a portion of the outer side of the curved surface;

[0042] The second support portion fills a section of the gap.

[0043] In some embodiments, the second support portion and the first support portion are connected as one unit.

[0044] In some embodiments, the support and fixing structure further includes a conductive layer located on the side of the fixing portion away from the curved surface, and the conductive layer at least covers a portion of the fixing portion on the side away from the curved surface.

[0045] The cover plate includes a substrate and an ink layer, the ink layer being located on the side of the substrate closer to the display panel, and the ink layer surrounding the periphery of the substrate;

[0046] The conductive layer is in contact with the ink layer and the middle frame, respectively.

[0047] In some embodiments, the shapes of the contact portions of the supporting fixing structure and the middle frame are adapted to each other.

[0048] In some embodiments, the area of ​​the supporting and fixing structure that contacts the middle frame is provided with a first protruding structure, and the area of ​​the middle frame that contacts the supporting and fixing structure is provided with a first recessed structure, wherein the size and shape of the first protruding structure and the first recessed structure are adapted to each other.

[0049] And / or, the area of ​​the supporting and fixing structure that contacts the middle frame is provided with a second recessed structure, and the area of ​​the middle frame that contacts the supporting and fixing structure is provided with a second protruding structure, wherein the size and shape of the second recessed structure and the second protruding structure are adapted to each other.

[0050] In some embodiments, the materials of the fixing portion, the first support portion, and the second support portion include thermoplastic organic polymer materials, and / or thermosetting organic polymer materials, and / or photocurable organic polymer materials.

[0051] In some embodiments, the display panel includes a plurality of signal lines extending from the display area to the bend area.

[0052] The signal line and the hole do not overlap in their orthographic projections on the display panel.

[0053] In some embodiments, at least a portion of the signal lines located around the hole within the bending area have a line width smaller than the line width of the same signal lines within the display area.

[0054] In some embodiments, at least a portion of the signal lines located outside the hole within the bending region follow a curved path that bends away from the hole.

[0055] In some embodiments, the spacing between adjacent signal lines in at least a portion of the signal lines located around the hole within the bending region is unequal.

[0056] Secondly, embodiments of this disclosure provide a display device, which includes the aforementioned display module.

[0057] Thirdly, embodiments of this disclosure provide a mold for injection molding the support and fixing structure in the aforementioned display module.

[0058] This includes injection-molded structures.

[0059] 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 on the back side of the display panel;

[0060] In the binding side bezel area of ​​the display panel, the bending area of ​​the display panel is bent into a curved surface towards its back side;

[0061] The orthographic projection of the injection-molded structure onto the display panel covers at least a portion of the area of ​​the bonded side bezel region;

[0062] The injection molding structure is configured to contact the edge of the back side of the display panel and the cover plate in the display module, and to form a first sealing channel between the back side of the display panel and the cover plate.

[0063] On the side of the injection-molded structure opposite to the display panel, a first opening is provided at the position of the inner hole in the bending area of ​​the display panel. The first opening is connected to the first sealing channel, and the orthographic projections of the first opening and the hole on the display panel at least partially overlap.

[0064] In some embodiments, 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 its bending axis.

[0065] The first sealing channel surrounds the entire binding side frame area.

[0066] In some embodiments, the length of the first sealing channel is less than or equal to the length of the binding side frame region, the length of the binding side frame region being the length of the curved surface along its bending axis;

[0067] The first sealing channel corresponds to a portion of the area surrounding the binding side frame area.

[0068] 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 frame area, and the multiple first openings correspond one-to-one with the multiple holes in the bending area;

[0069] The length direction of the binding side frame area is the bending axis of the curved surface.

[0070] In some embodiments, the orthographic projection shape of the first opening on the display module includes a circle, an ellipse, a rectangle, or a polygon;

[0071] The maximum radial dimension of the first opening projected onto the display module ranges from 0.1 to 0.6 mm.

[0072] Alternatively, the maximum radial dimension of the first opening projected onto the display module ranges from 0.1 to 0.3 mm.

[0073] Alternatively, the maximum radial dimension of the first opening projected onto the display module ranges from 0.2 to 0.5 mm.

[0074] In some embodiments, a second opening is provided on the side of the injection-molded structure opposite to the display panel at one end corresponding to the bonding side bezel area, and a third opening is provided on the other side of the injection-molded structure opposite to the display panel at the other end corresponding to the bonding side bezel area.

[0075] The second opening and the third opening are respectively connected to the first sealing channel;

[0076] The second opening, the third opening, and the hole do not overlap in their orthographic projections on the display panel.

[0077] In some embodiments, the injection-molded structure is further configured to surround the unbonded side bezel area of ​​the display panel.

[0078] The orthogonal projection of the injection-molded structure onto the display panel also covers the non-bonded side bezel area;

[0079] The injection-molded structure is also configured to contact the back side of the unbonded side frame area and the edge of the cover plate, and to form a second sealing channel between the unbonded side frame area and the cover plate;

[0080] The second sealing channel is connected to the first sealing channel;

[0081] On the side of the injection-molded structure opposite to the display panel, a fourth opening is provided at the connection position of the adjacent unbonded side bezel area.

[0082] The fourth opening is connected to the second sealing channel.

[0083] Fourthly, embodiments of this disclosure provide a method for manufacturing a display module, including the preparation of a display panel;

[0084] The display panel has a display side and a back side, which are opposite to each other.

[0085] The display panel includes a display area, a bending area, and a bonding area. The bending area is connected to the display area and the bonding area respectively. The bending area is bent into a curved surface towards the back side of the display panel. The bonding area is located on the back side of the display panel.

[0086] The bending area has a hole, and one end of the hole is located on the display side of the display panel;

[0087] A cover plate is affixed to the display side of the display panel;

[0088] The cover plate covers the display panel;

[0089] This also includes using the aforementioned mold injection molding to form the support and fixing structure; or using 3D printing technology to prepare the support and fixing structure;

[0090] Install the middle frame;

[0091] The supporting and fixing structure is located at least between the curved surface and the middle frame, and the supporting and fixing structure covers at least a portion of the curved surface on the outer side away from the display area of ​​the display panel.

[0092] The supporting and fixing structure covers one end opening of the hole.

[0093] The beneficial effects of the embodiments of this disclosure are as follows: The display module provided in the embodiments of this disclosure, by providing a support and fixing structure at least between the curved surface and the middle frame, and by making one end of the support and fixing structure cover the hole open, allows part of the support and fixing structure to be located between the curved surface and the middle frame and partially embedded in the hole. This ensures, on the one hand, that a certain gap is maintained between the curved surface and the middle frame, preventing the middle frame from causing bumps and squeezing damage to the curved surface during assembly and transportation; on the other hand, the support and fixing structure can support and fix the curved surface, and at the same time buffer the squeezing force of the middle frame, preventing the bending area from being bumped and squeezed by the middle frame, thereby ensuring the safety of the bending area that is bent into a curved surface and ensuring the reliability of the circuit wiring in the bending area.

[0094] The display device provided in this embodiment of the present disclosure, by employing the above-described display module, can ensure the quality of the display device.

[0095] The mold provided in this embodiment applies pressure to the liquid adhesive material during the injection molding process. Compared with the related technology, which uses printing technology to prepare the supporting and fixing structure, the liquid adhesive material in the injection molding process has a higher filling density and better impact resistance. Attached Figure Description

[0096] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0097] Figure 1a This is a schematic diagram of the assembly structure of the binding side bezel area of ​​a display device in the related art.

[0098] Figure 1b This is a schematic diagram of the assembly structure of the binding side bezel area of ​​another display device in the related technology.

[0099] Figure 2a This is a top view of the display side of a display module in a flattened state, representing an embodiment of the present disclosure.

[0100] Figure 2b This is a top view of the back side of a display panel bending area in a display module according to an embodiment of the present disclosure, in a bent state.

[0101] Figure 2c For along Figure 2b A structural cross-sectional view of the AA' section line.

[0102] Figure 2d For along Figure 2b Another structural cross-sectional view of the AA' section line.

[0103] Figure 2e This is a top view of the display side of a display module in a flattened state, representing another embodiment of the present disclosure.

[0104] Figure 2f This is a top view of the display side of a display module in a flattened state, representing another embodiment of the present disclosure.

[0105] Figure 2g This is a top view of the display side of a display module in a flattened state, representing another embodiment of the present disclosure.

[0106] Figure 3a For along Figure 2b Another structural sectional view of the AA' section line.

[0107] Figure 3b For along Figure 2b Another structural sectional view with the AA' section line.

[0108] Figure 3c For along Figure 2b Another structural sectional view with the AA' section line.

[0109] Figure 4a This is a schematic diagram of the supporting and fixing structure in an embodiment of this disclosure.

[0110] Figure 4b For along Figure 4a A structural sectional view along the BB' section line.

[0111] Figure 5a This is a top-rear view of the bent area of ​​the display panel in a bent state in another embodiment of the present disclosure.

[0112] Figure 5b This is a top view of the back side of a display panel bending area in a bending state in another embodiment of the present disclosure.

[0113] Figure 5c For along Figure 5a The CC' section line and Figure 5b A structural cross-sectional view of the DD' section line.

[0114] Figure 5d For along Figure 5a The CC' section line and Figure 5b Another structural cross-sectional view of the DD' section line.

[0115] Figures 6a-6k For along Figure 5a The CC' section line and Figure 5b A structural cross-sectional view of the DD' section line.

[0116] Figures 7a-7b For along Figure 5a The CC' section line and Figure 5b A structural cross-sectional view of the DD' section line.

[0117] Figure 8a This is a schematic diagram of the wiring within the bending area of ​​the display panel in the display module of this embodiment.

[0118] Figure 8b This is a schematic diagram of another wiring pattern in the bending area of ​​the display panel in the display module of this disclosure embodiment.

[0119] Figure 8c This is a schematic diagram of another type of wiring in the bending area of ​​the display panel in the display module of this disclosure embodiment.

[0120] Figure 8d for Figure 8c An enlarged schematic diagram of section G in the middle.

[0121] Figure 9a This is a side view schematic diagram of a structure in which the mold is installed in the binding side frame area of ​​the display panel in the display module according to an embodiment of the present disclosure.

[0122] Figure 9b This is a front view schematic diagram of a structure in which the mold is installed in the binding side frame area of ​​the display panel in the display module according to an embodiment of the present disclosure.

[0123] Figure 9c This is a front view schematic diagram of another structure in which the mold is installed in the binding side frame area of ​​the display panel in the display module, according to an embodiment of this disclosure.

[0124] Figure 9d This is a diagram showing the injection circuit of the injection structure in the mold according to an embodiment of this disclosure.

[0125] Figure 9e This is a front view schematic diagram of another structure in which the mold is installed in the binding side frame area of ​​the display panel in the display module, according to an embodiment of this disclosure.

[0126] Figure 10aThis is a top view schematic diagram of the structure of a mold according to an embodiment of the present disclosure.

[0127] Figure 10b This is a top view schematic diagram of the structure of another mold in an embodiment of this disclosure.

[0128] Figure 10c This is a side view of the structure of the mold installed in the non-bonded side frame area of ​​the display panel in the display module, according to an embodiment of this disclosure.

[0129] Figure 11 This is a schematic diagram illustrating the process of preparing the support and fixing structure using 3D printing technology in an embodiment of this disclosure. Detailed Implementation

[0130] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the following describes in further detail a display module, its preparation method, display device, and mold provided by the embodiments of this disclosure in conjunction with the accompanying drawings and specific implementation methods.

[0131] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0132] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0133] Currently, with the rapid development of the OLED display industry, a large number of new display devices are gradually entering the market. In order to achieve a larger screen-to-body ratio and provide customers with a better visual experience, narrow bezels have become a trend in display devices.

[0134] In related technologies, refer to Figure 1a This is a schematic diagram of the assembly structure of the binding side bezel area of ​​a display device in the related technology. In the display module, the binding side bezel area J1 (generally the bottom bezel) of the display panel 1 (flexible panel) is bent towards its back side and fixed to the back side of the display panel 1. During the assembly of the whole unit 18 (i.e. the entire display device), the edge of the cover plate 3 located on the display side of the display panel 1 is assembled with the whole unit 18 (such as the middle frame). After the assembly is completed, a gap M with a sufficient width (about 0.8 to 2 mm) needs to be reserved between the bent area K (i.e., the Pad Bending area) of the binding side bezel area J1 of the display panel 1 and the whole unit 18 to ensure the safety of the bent area K, such as avoiding the bent area K from being bumped and squeezed during assembly and transportation.

[0135] In related technologies, refer to Figure 1b This is a schematic diagram of the assembly structure of the bonding side bezel area of ​​another display device in the related technology. Through BNB (printing adhesive material on the outside of the bending area) or BNB (printing adhesive material on the outside of the bending area) + bending potting (applying adhesive on the inside of the bending area), a regularly shaped adhesive frame 19 is formed in the gap between the bending area K of the display panel and the main unit 18. This improves the impact resistance of the bending area K, and the assembly with the main unit 18 reduces 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 bezel (bezel width reduction > 1mm). However, the adhesive in the bending potting process shrinks, resulting in incomplete filling on the inside of the bending area; and because the adhesive material in the BNB process is different from that in the bending potting process, the two adhesive materials have poor fusion, leading to poor impact resistance in the bending area.

[0136] To address the aforementioned problems in the related art, in a first aspect, embodiments of this disclosure provide a display module, referring to... Figure 2a , Figure 2b , Figure 2c and Figure 2d , Figure 2a This is a top view of the display side of a display module in a flattened state, representing an embodiment of the present disclosure; Figure 2b This is a top view of the back side of a display panel bending area in a display module according to an embodiment of the present disclosure, in a bent state; Figure 2c For along Figure 2b A structural sectional view of the AA' section line; Figure 2d For along Figure 2b Another structural cross-sectional view along the AA' section line; wherein, a display panel 1 is included, having a display side A and a back side B, with the display side A and back side B facing each other. The display panel 1 includes a display area 100, a bending area 101, and a binding area 102. The bending area 101 is connected to the display area 100 and the binding area 102 respectively. The bending area 101 is bent towards the back side B of the display panel 1 to form a curved surface C. The binding area 102 is located on the back side B of the display panel 1. The bending area 101 has a hole D, one end of which is open on the display side A of the display panel 1. A cover plate 3 is fitted onto the display side A of the display panel 1, covering the display panel 1. A middle frame 4 surrounds the periphery of the edge of the display panel 1 and contacts the edge of the cover plate 3. A support and fixing structure 2 is located at least between the curved surface C and the middle frame 4, and the support and fixing structure 2 covers at least a portion of the curved surface C that is away from the outer side of the display area 100 of the display panel 1. The support and fixing structure 2 covers one end of the opening of the hole D.

[0137] In this process, some circuit traces in the display panel 1 extend from the display area 100 to the bending area 101, and then from the bending area 101 to the bonding area 102. The bonding area 102 is bonded to the peripheral circuit board, thereby enabling the peripheral circuit board to provide drive signals (such as data signals, control signals, power signals, etc.) to the display panel 1.

[0138] In this embodiment, by providing a support and fixing structure 2 at least between the curved surface C and the middle frame 4, and by covering one end of the hole D with the support and fixing structure 2, part of the support and fixing structure 2 is located between the curved surface C and the middle frame 4, and part is embedded in the hole D. This ensures that a certain gap is maintained between the curved surface C and the middle frame 4, preventing the middle frame 4 from causing bumps and squeezing damage to the curved surface C during assembly and transportation. On the other hand, the support and fixing structure 2 can support and fix the curved surface C, and at the same time buffer the squeezing force of the middle frame 4, preventing the bending area 101 from being bumped and squeezed by the middle frame 4, thereby ensuring the safety of the bending area 101 that is bent into the curved surface C and ensuring the reliability of the circuit wiring in the bending area 101.

[0139] In some embodiments, refer to Figure 2c and Figure 2d Hole D includes through holes and / or blind holes. Through holes penetrate the thickness of the bending area 101 of the display panel 1. Blind holes have a depth less than the thickness of the bending area 101 of the display panel 1.

[0140] In some embodiments, refer to Figure 2a There is one hole D, and one hole D is located at the middle position of the bending area 101 along its length direction X.

[0141] In some embodiments, refer to Figure 2e This is a top view of the display side of the display panel in a flattened state in another embodiment of the present disclosure; the number of holes D is two, and the two holes D are arranged at intervals along the length direction X of the bending area 101; or, refer to Figure 2f This is a top view of the display side of the display panel in a flattened state in another embodiment of the present disclosure; the two holes D are arranged at intervals along the width direction Y of the bending area 101.

[0142] In some embodiments, refer to Figure 2g This is a top view of the display side of a display panel bending area in a flattened state in another embodiment 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.

[0143] The length direction X of the bending region 101 is parallel to the bending axis P of the curved surface C; the width direction Y of the bending region 101 is perpendicular to the bending axis P of the curved surface C.

[0144] In this embodiment, the inclusion of at least one blind hole or through hole allows a portion of the support and fixing structure 2 to be embedded therein, thereby providing good support and fixation for the bending area 101 of the display panel 1 bent into the curved surface C, thus ensuring the safety of the bending area 101. Furthermore, the inclusion of at least one through hole also allows the injection molding or 3D printing material to enter the inner side of the curved surface C near the display area 100 of the display panel 1 during injection molding or 3D printing of the support and fixing structure 2. This allows the support and fixing structure 2 to also provide support for the inner side of the curved surface C, further ensuring the safety of the bending area 101.

[0145] 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 aforementioned maximum radial dimension range of the hole D ensures 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 near the display area 100 of the display panel 1 through the through hole, thereby providing good support and fixation for the outer or inner / outer sides of the curved surface C, thus ensuring the safety of the bending area 101 of the curved surface C.

[0146] 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, 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 at least covers the bending area 101.

[0147] The first protective layer 5 reinforces the bending area 101, improving its bending stress and preventing breakage of circuit traces within the bending area 101. The first protective layer 5 is made of organic adhesive. It can be prepared by applying adhesive to the back side B of the bending area 101 to form an adhesive film, or by bonding a photocurable monomeric adhesive film to the back side B of the bending area 101 and then curing it with light (such as UV light).

[0148] In some embodiments, refer to Figure 3b , for along Figure 2b Another structural cross-sectional view along the AA' section line; hole D penetrates the first protective layer 5. That is, in this embodiment, hole D is a through hole opened in the bending area 101.

[0149] In some embodiments, refer to Figure 3c , for along Figure 2b Another structural cross-sectional view of the AA' section line; the display module also includes a second protective layer 6, 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 at least covers the bending area 101.

[0150] The second protective layer 6 further reinforces the bending area 101, improving its bending stress and preventing breakage of circuit traces within the bending area 101. The second protective layer 6 is made of organic adhesive. It can be directly attached to the display side A of the bending area 101. Additionally, the display module includes a touch layer and a color filter layer (not shown in the figure). These layers are sequentially stacked on the display side A of the display panel 1, and their orthogonal projections onto the display panel 1 cover the display area 100. The touch layer includes a first organic resin material layer, and the color filter layer includes a second organic resin material layer. The second protective layer 6 can also extend from either the first or second organic resin material layer to the bending area 101, covering it and thus reinforcing it.

[0151] In some embodiments, refer to Figure 3c Hole D penetrates the second protective layer 6. That is, in this embodiment, hole D is a through hole opened in the bending area 101.

[0152] In some embodiments, refer to Figure 2c , Figure 2d , Figure 3a , Figure 4a and Figure 4b , Figure 4a This is a schematic diagram of the supporting and fixing structure in an embodiment of this disclosure; Figure 4b For along Figure 4a A cross-sectional view of the structure along the BB' section line; the supporting and fixing structure 2 includes a fixing part 21 and a first supporting part 22, which are connected as one unit. The fixing part 21 is located on the outside of the curved surface C and covers at least a portion of the outer area of ​​the curved surface C; the first supporting part 22 is embedded in the hole D of the bending area 101 of the display panel 1. The first supporting part 22 can provide support for the outside of the bending area 101, and the fixing part 21 can fix the outside of the bending area 101.

[0153] In some embodiments, refer to Figure 5a This is a top view of the back side of another display module in the present disclosure, showing the bent area of ​​the display panel in a bent state. Figure 5b This is a top view of the back side of a display panel bending area in a bending state in another embodiment of the present disclosure; Figure 5c For along Figure 5a The CC' section line and Figure 5bA structural cross-sectional view along the DD' section line is shown. The display module further includes a back film 7 and a support film 8, located on the back side B of the display panel 1, with the back film 7 and support film 8 stacked sequentially away from the display panel 1. The orthographic projections of the back film 7 and support film 8 onto the display panel 1 do not overlap with the bending area 101 of the display panel 1. A gap is formed between the end face of the back film 7 and support film 8 near the curved surface C and the inner side of the curved surface C near the display area 100 of the display panel 1. The supporting and fixing structure 2 further includes a second support portion 23, located in the gap inside the curved surface C and in contact with the inner side of the curved surface C. The second support portion 23 can provide support and fixation to the inner side of the bending area 101 bent into the curved surface C, thereby further ensuring the safety of the bending area 101 bent into the curved surface C.

[0154] In some embodiments, refer to Figure 5a and Figure 5c The length direction of the supporting and 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 P of the curved surface C, the length of the supporting and fixing structure 2 is greater than or equal to the length of the curved surface C, the fixing part 21 covers the entire outer side of the curved surface C; the second supporting part 23 fills the entire gap.

[0155] In some embodiments, refer to Figure 5b and Figure 5c The length direction of the supporting and 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 P of the curved surface C, the length of the supporting and fixing structure 2 is less than the length of the curved surface C, the fixing part 21 covers a portion of the outer side of the curved surface C, and the second supporting part 23 fills a portion of the gap.

[0156] In some embodiments, refer to Figure 5c The second support part 23 and the first support part 22 are connected as one unit.

[0157] In some embodiments, refer to Figure 5d , for along Figure 5a The CC' section line and Figure 5b Another structural cross-sectional view of the DD' section line; the supporting and fixing structure 2 also includes a conductive layer 24, located on the side of the fixing part 21 away from the curved surface C, and the conductive layer 24 at least covers a portion of the area of ​​the fixing part 21 away from the curved surface C; the cover plate 3 includes a substrate 31 and an ink layer 32, the ink layer 32 is located on the side of the substrate 31 near the display panel 1, and the ink layer 32 surrounds the periphery of the substrate 31; the conductive layer 24 contacts the ink layer 32 and the middle frame 4 respectively.

[0158] The conductive layer 24 can be made of conductive cloth or conductive adhesive. The middle frame 4 is made of metal and connects to the grounding terminal of the display module. The ink layer 32 can be made of conductive ink. The conductive layer 24 enhances the edge compression of the side frame of the display module, reducing the thickness of the side frame. Furthermore, the contact between the conductive layer 24 and the middle frame 4 and the ink layer 32 allows static electricity generated by the side frame of the display module to be conducted to the grounding terminal, thereby improving the green screen phenomenon of the display module. In addition, related technologies improve the green screen phenomenon by preparing a light-shielding conductive film layer in the display area using a patterning process. This method increases the cost of the display module and reduces its production capacity. In this embodiment, the conductive layer 24 can be directly attached to the side of the fixing part 21 away from the curved surface C. Compared to the related technologies, this method reduces the cost of the display module and increases its production capacity.

[0159] In some embodiments, refer to Figures 6a-6k , for along Figure 5a The CC' section line and Figure 5b The structural cross-sectional view along the DD' section line shows that the shapes of the contact portions of the supporting and fixing structure 2 and the middle frame 4 are adapted to each other. This configuration allows the supporting and fixing structure 2 and the middle frame 4 to provide a more robust fixation to the bent area 101, which is bent into a curved surface C, thereby further preventing damage to the bent area 101 from impacts and pressure during the assembly and transportation of the display module.

[0160] In some embodiments, refer to Figures 6a-6k The area of ​​the supporting and fixing structure 2 that contacts the middle frame 4 is provided with a first protruding structure E1, and the area of ​​the middle frame 4 that contacts the supporting and fixing structure 2 is provided with a first recessed structure F1, the size and shape of the first protruding structure E1 and the first recessed structure F1 are adapted to each other; and / or, the area of ​​the supporting and fixing structure 2 that contacts the middle frame 4 is provided with a second recessed structure E2, and the area of ​​the middle frame 4 that contacts the supporting and fixing structure 2 is provided with a second protruding structure F2, the size and shape of the second recessed structure E2 and the second protruding structure F2 are adapted to each other.

[0161] In some embodiments, refer to Figure 6g , Figure 6h and Figure 6i The first protruding structure E1 and the second protruding structure F2 are both micro-protruding structures, and the first concave structure F1 and the second concave structure E2 are both micro-concave structures.

[0162] In some embodiments, refer to Figure 7a and Figure 7b , for along Figure 5a The CC' section line and Figure 5bA structural sectional view along the DD' section line; a recess E3 is provided on the side of the supporting and fixing structure 2 near the middle frame 4. The recess E3 can be a groove or a pit, and it does not contact the middle frame 4. (Refer to...) Figure 7a The bending area 101 at the recessed part E3 is not exposed. (Refer to...) Figure 7b The bending area 101 is exposed at the recessed portion E3. (Refer to...) Figure 7a and Figure 7b The area of ​​the supporting and fixing structure 2 other than the recessed part E3 on the side near the middle frame 4 is in contact with the middle frame 4.

[0163] In some embodiments, refer to Figure 6a and Figure 6e The end of the middle frame 4 that contacts the cover plate 3 has a stepped structure that matches the edge of the cover plate 3. The edge of the cover plate 3 is set on the stepped structure, and the stepped structure can support and fix the cover plate 3.

[0164] 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 supporting and fixing structure 2 and the middle frame 4.

[0165] In some embodiments, refer to Figure 7a and Figure 7b The end of the middle frame 4 that contacts the cover plate 3 is located on the outer side of the edge of the cover plate 3 and does not overlap with the cover plate 3.

[0166] In some embodiments, refer to Figure 6k A sealing structure 9 is provided between the end of the middle frame 4 near the cover plate 3 and the cover plate 3. The sealing structure 9 can also extend between the support and fixing structure 2 and the cover plate 3. The sealing structure 9 can prevent external moisture from entering the display area 100 and the bending area 101 of the display panel 1, thereby avoiding the circuit wiring of the display area 100 and the bending area 101 from being corroded by moisture.

[0167] In some embodiments, the display module further includes a polarizer 10 located between the display panel 1 and the cover plate 3, wherein the orthographic projection of the polarizer 10 on the display panel 1 at least covers the display area 100. The polarizer 10 is bonded to the display panel 1 and to the cover plate 3 by an optical adhesive layer 11.

[0168] In some embodiments, the support and fixing structure 2 is in direct contact with the bending area 101. Further, a second protective layer can be provided between the bending area 101 and the support and fixing structure 2, which protects 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 the edge of the polarizer 10 near the bending area 101, thereby better preventing external moisture from entering the display area 100 of the display panel 1.

[0169] In some embodiments, the cover plate 3 can be a multi-layer structure, and a polarizer is integrated into the cover plate 3; for example, the cover plate 3 is formed by sequentially stacking a cover film, a first adhesive layer, a polarizer, and a second adhesive layer; wherein, the material of the cover film can be polyimide or polyethylene terephthalate. Alternatively, the cover plate can also be formed by sequentially stacking an ultra-thin flexible glass plate, a first adhesive layer, a polarizer, and a second adhesive layer.

[0170] In some embodiments, a polarizer may not be provided between the display panel 1 and the cover plate 3, such as by providing a color filter layer instead of a polarizer.

[0171] In some embodiments, the materials of the fixing portion 21, the first support portion 22, and the second support portion 23 include thermoplastic organic polymer materials, and / or thermosetting organic polymer materials, and / or photocurable organic polymer materials. Thermosetting organic polymer materials include epoxy resins, polyurethanes, and / or other polymer materials. Photocurable organic polymer materials include UV-curable organic polymer materials.

[0172] Among them, the support and fixing structure 2 using the above-mentioned materials can provide good support and fixing for the bending area 101, and can also buffer the impact and squeezing forces transmitted to it by the middle frame 4 and the cover plate 3, so as to avoid damage to the circuit wiring in the bending area 101 by the impact and squeezing forces.

[0173] In some embodiments, refer to Figure 8a This is a schematic diagram of a wiring diagram within the bending area of ​​the display panel in the display module of this embodiment. Figure 8b This is a schematic diagram of another wiring pattern in the bending area of ​​the display panel in the display module according to an embodiment of this disclosure; Figure 8c This is a schematic diagram of another type of wiring within the bending area of ​​the display panel in the display module of this disclosure embodiment; Figure 8d for Figure 8c An enlarged schematic diagram of section G; the display panel 1 includes multiple signal lines 12, which extend from the display area 100 to the bending area 101. The orthographic projections of the signal lines 12 and the hole D on the display panel 1 do not overlap. This arrangement ensures that the signal lines 12 located in the bending area 101 of the display panel 1 avoid the hole D, thereby preventing breakage or damage to the signal lines 12 passing through the hole D.

[0174] In some embodiments, the signal line routing within the display area 100 of the display panel 1 adopts FIP (Fanout Interconnection Pattern) technology. That is, the signal line routing within the display area 100 is reduced by means of circuit structure design, such as by sharing the routing within the display area 100 or by using the routing within the display area 100. This reduces the signal line routing in the bending area 101 and / or other border areas of the display module, and integrates some of the signal line routing in the bending area 101 and / or other border areas within the display area 100, thereby narrowing the border width of the display module.

[0175] In some embodiments, refer to Figure 8a At least a portion of the signal lines 12 located outside the inner hole D in the bending area 101 have a line width smaller than that of the same signal lines within the display area 100. That is, by reducing the line width of at least a portion of the signal lines 12 that avoid the hole D within the bending area 101, the signal lines 12 avoid the hole D.

[0176] In some embodiments, refer to Figure 8b At least a portion of the signal lines 12 located around the inner hole D in the bending area 101 have a curved orientation that bends away from the hole D. That is, by making the orientation of at least a portion of the signal lines 12 around the hole D a curved orientation, the signal lines 12 avoid the hole D.

[0177] In some embodiments, refer to Figure 8c and Figure 8d At least some of the signal lines 12 located outside the inner hole D in the bending area 101 have unequal spacing between adjacent signal lines 12. That is, by setting the spacing between at least some adjacent signal lines 12 outside the hole D to be unequal, the signal lines 12 avoid the hole D.

[0178] The display module provided in this embodiment of the present disclosure, by providing a support and fixing structure at least between the curved surface and the middle frame, and by having one end of the support and fixing structure cover the opening of the hole, allows part of the support and fixing structure to be located between the curved surface and the middle frame and partially embedded in the hole. This ensures, on the one hand, that a certain gap is maintained between the curved surface and the middle frame, preventing the middle frame from causing bumps and squeezing damage to the curved surface during assembly and transportation; on the other hand, the support and fixing structure can support and fix the curved surface, while also buffering the squeezing force of the middle frame, preventing the bending area from being bumped and squeezed by the middle frame, thereby ensuring the safety of the bending area and the reliability of the circuit wiring within the bending area.

[0179] Secondly, embodiments of this disclosure also provide a display device, including the display module in the above embodiments.

[0180] By employing the display module described in the above embodiments, the quality of the display device can be ensured.

[0181] Thirdly, this disclosure also provides a mold for injection molding the support and fixing structure in the above-mentioned display module, referring to... Figure 9a and Figure 9b , Figure 9a This is a side view schematic diagram of a structure in which the mold is installed in the binding side frame area of ​​the display panel in the display module according to an embodiment of the present disclosure; Figure 9b This is a front view schematic diagram of a structure in which a mold is installed in the binding side frame area of ​​a display panel in a display module according to an embodiment of the present disclosure; wherein, an injection molding structure 13 is included, which 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 on 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 its back side B; the orthographic projection of the injection molding structure 13 on the display panel 1 covers at least a portion 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; on the side of the injection molding structure 13 away from the display panel 1, a first opening H1 is provided at the position corresponding to the inner hole D of the bending area 101 of the display panel 1, the first opening H1 and the first sealing channel 14 are connected, and the orthographic projections of the first opening H1 and the hole D on the display panel 1 at least partially overlap.

[0182] The injection molding structure 13 can contact the back side of the bonding side bezel area J1 of the display panel 1, or it can contact the back side of an area other than the bonding side bezel area J1 of the display panel 1. When the hole D is a blind hole, the liquid adhesive injected from the first opening H1 on the injection molding structure 13 can directly enter the blind hole and also fill the first sealing channel 14. After curing, the liquid adhesive can form a support and fixing structure located in the blind hole and on the outside of the curved surface C. When the hole D is a through hole, the liquid adhesive injected from the first opening H1 on the injection molding structure 13 can enter the through hole and enter the inner side of the curved surface C through the through hole, thereby further filling the gap on the inner side of the curved surface C. In addition, it can also fill the first sealing channel 14. After curing, the liquid adhesive can form a support and fixing structure located on the inner and outer sides of the curved surface C and in the through hole.

[0183] In this embodiment, since the injection structure 13 of the mold applies pressure to the liquid adhesive material during the injection process, compared with the related technology of preparing the support and fixing structure through printing process (such as BNB process), the liquid adhesive material in the injection process has a higher filling density and better impact resistance.

[0184] In some embodiments, refer to Figure 9bThe length of the first sealing channel 14 is greater than 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 its bending axis; the first sealing channel 14 surrounds the entire binding side frame area J1.

[0185] With this configuration, when hole D is a blind hole, the injection molding structure 13 can injection mold a fixing part covering the entire outer side of the curved surface C and a first support part embedded in the blind hole through the first sealing channel 14. Simultaneously, since the length of the first sealing channel 14 is greater than the length of the binding side frame area J1, liquid adhesive can also enter the inner side of the curved surface C through the two ends of the first sealing channel 14 beyond the length of the binding side frame area J1, thereby forming a second support part filling the entire inner gap of the curved surface C. When hole D is a through hole, the injection molding structure 13 can injection mold a fixing part covering the entire outer side of the curved surface C and a first support part embedded in the through hole through the first sealing channel 14. Simultaneously, liquid adhesive can also enter the inner side of the curved surface C through the two ends of the first sealing channel 14 beyond the length of the binding side frame area J1 and the through hole, thereby forming a second support part filling the entire inner gap of the curved surface C.

[0186] In some embodiments, refer to Figure 9c This is a front view schematic diagram of another structure of the binding side frame area of ​​the display panel in the display module, which is installed by the mold in the embodiment of this 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 its bending axis; the first sealing channel 14 corresponds to a part of the area surrounding the binding side frame area J1.

[0187] 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 (referring to 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. With this configuration, when the hole D is a blind hole, the injection molding structure 13 can injection mold a fixing part covering the outer part of the curved surface C and a first support part embedded in the blind hole through the first sealing channel 14; while the second support part cannot be injection molded in the gap on the inner side of the curved surface C. When the hole D is a through hole, the injection molding structure 13 can injection mold a fixing part covering the outer part of the curved surface C and a first support part embedded in the through hole through the first sealing channel 14; at the same time, liquid adhesive can also enter the inner side of the curved surface C through the through hole, thereby forming a second support part filling the gap on the inner side of the curved surface C.

[0188] It should be noted that the first sealing channel 14 can be the space actually formed between the injection molding structure 13 and the back side B of the display panel 1 and the cover plate 3, or it can be the actual space that can be filled with liquid adhesive after applying a vacuum within the space actually formed. If only part of the space can be filled with liquid adhesive after applying a vacuum within the space actually formed between the injection molding structure 13 and the back side B of the display panel 1 and the cover plate 3, then the other spaces where liquid adhesive cannot be filled do not belong to the first sealing channel 14.

[0189] In some embodiments, there are multiple first openings H1, and 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 correspond one-to-one with the multiple holes D of the bending area 101; the length direction X of the binding side frame area J1 is the bending axis P of the curved surface.

[0190] In some embodiments, the orthographic projection shape of the first opening H1 on the display module includes a circle, an ellipse, a rectangle, or a polygon; the maximum radial dimension of the orthographic projection of the first opening H1 on the display module ranges from 0.1 to 0.6 mm; or, the maximum radial dimension of the orthographic projection of the first opening H1 on the display module ranges from 0.1 to 0.3 mm; or, the maximum radial dimension of the orthographic projection of the first opening H1 on the display module ranges from 0.2 to 0.5 mm.

[0191] In some embodiments, a second opening H2 is provided on the side of the injection molding structure 13 away from the display panel 1 at one end of the corresponding binding side frame area J1, and a third opening H3 is provided on the other side of the injection molding structure 13 away from the display panel 1 at the other end of the corresponding binding side frame area J1. The second opening H2 and the third opening H3 are respectively connected to the first sealing channel 14. The orthographic projections of the second opening H2, the third opening H3 and the hole D on the display panel 1 do not overlap.

[0192] Of the two openings, H2 and H3, one can serve as the injection inlet of the injection structure 13, and the other as the vent. The vent connects the injection structure 13 to the outside atmosphere, allowing liquid adhesive to be injected from the injection inlet into the first sealed channel 14. During the injection molding process, the injection structure 13 can inject liquid adhesive into the first sealed channel 14 through the injection inlet, while simultaneously applying a vacuum at the vent to ensure that the liquid adhesive is injected into the designated space within the first sealed channel 14 through the injection inlet.

[0193] In some embodiments, refer to Figure 9dThis is a diagram showing the injection path of the injection structure in the mold according to an embodiment of this disclosure. Two first openings H1 are formed between the second opening H2 and the third opening H3 of the injection structure 13. The second opening H2, the third opening H3, and the two first openings H1 are arranged at equal intervals along the length of the injection structure. Glue can be injected simultaneously at the second opening H2, the third opening H3, and the two first openings H1. During injection, the liquid glue flows simultaneously to both sides of each first opening H1 after being injected into the first sealed channel 14; that is, each first opening H1 is equivalent to adding two injection paths. Using... Figure 9d The glue injection scheme shown can increase the number of glue injection paths from two (Figures ① and ⑥) before the first opening H1 is opened (only the second opening H2 and the third opening H3 are opened) to six (Figures ①②③④⑤⑥) after the first opening H1 is opened. The maximum glue path length is reduced from L before the first opening H1 is opened to L / 3 after the first opening H1 is opened. The reduction in glue path length can effectively reduce the pressure required for glue injection, thereby improving or solving the problem of difficult glue injection on the inner side of the curved surface C.

[0194] In some embodiments, refer to Figure 9e This is a front view schematic diagram of another structure in which the mold is installed in the bonding side frame area of ​​the display panel in the display module according to an embodiment of this disclosure. When the mold adopts a non-vacuum injection molding process, an vent is required. In related technologies, the mold injection molding scheme can only open an opening at one end of the injection molding structure for injection molding and an opening at the other end for venting. In this embodiment, a first opening H1 is opened at the middle position of the injection molding structure 13 corresponding to the bonding side frame area J1 of the display panel 1. The first opening H1 can serve as an injection inlet or an vent. The radial dimension of the vent can be smaller than the radial dimension of the injection inlet. For example, the radial dimension of the vent only needs to be 0.1 mm, while the radial dimension of the injection inlet is approximately 0.25 mm. (Refer to...) Figure 9e Five first openings H1 are made in the middle of the injection structure 13 of the side frame area J1 of the corresponding display panel 1, of which the second and fourth are glue injection inlets, and the first, third and fifth are exhaust outlets. Figure 9e In the injection molding structure 13 corresponding to the side frame area J1 of the display panel 1, a second opening H2 and a third opening H3 are respectively opened at both ends. Five first openings H1 are located between the second opening H2 and the third opening H3, and the five first openings H1 divide the distance between the second opening H2 and the third opening H3 equally. Both the second opening H2 and the third opening H3 serve as glue injection inlets. Thus, the glue injection path of the injection molding structure 13 can be increased from one of the related technical solutions (i.e., only opening the second opening and the third opening at both ends of the injection molding structure, with the second opening serving as the glue injection inlet and the third opening serving as the vent) to six in this embodiment. Assuming that the maximum glue path length of the injection structure in the related technical solution is 60mm, the maximum glue path length of the injection structure in this embodiment is reduced to 10mm.

[0195] In some embodiments, refer to Figure 10a , Figure 10b and Figure 10c , Figure 10a This is a top view schematic diagram of the structure of a mold according to an embodiment of this disclosure. Figure 10b This is a top view schematic diagram of the structure of another mold in an embodiment of this disclosure; Figure 10c This is a side view of the structure of the mold installed in the non-bonded side frame area of ​​the display panel in the embodiment of the present disclosure; wherein, the injection molding structure 13 is also configured to surround the non-bonded 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-bonded side frame area J2; the injection molding structure 13 is also configured to contact the back side of the non-bonded side frame area J2 and the edge of the cover plate 3, and form a second sealing channel 15 between the non-bonded side frame area J2 and the cover plate 3; the second sealing channel 15 is connected to the first sealing channel 14; a fourth opening H4 is also provided on the side of the injection molding structure 13 away from the display panel 1 at the connection position of the corresponding adjacent non-bonded side frame area J2, and the fourth opening H4 is connected to the second sealing channel 15.

[0196] Among them, reference Figure 10a The second opening H2 on the side of the injection molding structure 13 away from the display panel 1 at the connection position of the adjacent bonded side frame area J1 and the unbonded side frame area J2 serves as an injection inlet, and the fourth opening H4 on the side of the injection molding structure 13 away from the display panel 1 at the connection position of the adjacent unbonded side frame area J2 serves as an exhaust outlet. The second opening H2 and the fourth opening H4 are located at diagonal positions of the display panel 1.

[0197] In some embodiments, refer to Figure 10b Two fourth openings H4 can be provided. The injection molding structure 13 has a second opening H2 at the left end connection position of the corresponding binding side frame area J1 and the unbinding side frame area J2, and a third opening H3 at the right end connection position of the corresponding binding side frame area J1 and the unbinding side frame area J2. The second opening H2 and the fourth opening H4 are located at opposite corners of the display panel 1, and one of them serves as an injection port and the other as an exhaust port. The third opening H3 and the other fourth opening H4 are located at opposite corners of the display panel 1, and one of them serves as an injection port and the other as an exhaust port. For example, the fourth opening H4 in the upper left corner serves as an injection port, the third opening H3 in the lower right corner serves as an exhaust port, the fourth opening H4 in the upper right corner serves as an exhaust port, and the second opening H2 in the lower left corner serves as an injection port.

[0198] Additionally, the instruction manual states that the first sealing channel 14 and the second sealing channel 15 are connected to form a glue injection channel around the four-sided border area of ​​the display panel 1. When the support and fixing structure for supporting and fixing the four-sided edge of the display panel 1 is actually formed by injection molding through the glue injection structure 13, a vacuum can be applied to any opening of the glue injection structure 13, thereby forming the support and fixing structure of the required shape in the first sealing channel 14 and the second sealing channel 15.

[0199] Thirdly, this disclosure also provides a method for preparing the display module in the above embodiments, wherein step S1 includes preparing a display panel.

[0200] The display panel has a display side and a back side, which are opposite to each other. The display panel includes a display area, a bending area and a bonding area. The bending area is connected to the display area and the bonding area respectively. The bending area is bent into a curved surface towards the back side of the display panel. The bonding area is located on the back side of the display panel. The bending area has a hole, and one end of the hole is located on the display side of the display panel.

[0201] Step S2: Attach a cover plate to the display side of the display panel.

[0202] The cover plate covers the display panel.

[0203] It also includes step S3: forming a support and fixing structure by injection molding using the mold in the above embodiment; or, preparing the support and fixing structure using 3D printing process.

[0204] In this step, after the support and fixing structure is formed by injection molding, the mold is removed from the back of the display panel before subsequent process steps are performed.

[0205] Step S4: Install the middle frame.

[0206] The supporting and fixing structure is located at least between the curved surface and the middle frame, and the supporting and fixing structure covers at least a portion of the outer side of the curved surface away from the display area of ​​the display panel, and the supporting and fixing structure covers the opening at one end of the hole.

[0207] 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 when the length of the first sealing channel in the injection molding structure of the mold is less than or equal to the length of the side frame area of ​​the display panel (i.e. the curved surface formed by the bending of the bending area), a fixing part covering the outer part of the curved surface and a first support part embedded in the blind hole can be injection molded by the mold; while a second support part cannot be injection molded in the gap on the inner side of the curved surface.

[0208] 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 when the length of the first sealing channel in the injection molding structure of the mold is greater than the length of the side frame area of ​​the display panel (i.e. the curved surface formed by the bending of the bending area), a fixing part covering the entire outer side of the curved surface and a first support part embedded in the blind hole can be injection molded by the mold; at the same time, a second support part filling the gap on the inner side of the curved surface can also be injection molded on the inner side of the curved surface.

[0209] In some embodiments, when the bending area of ​​the display panel has a through hole, and the first protective layer disposed on the inner side of the curved surface formed by bending in the bending area and / or the second protective layer disposed on the outer side of the curved surface also have openings at the positions corresponding to the through hole, and 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 side frame area of ​​the display panel (i.e. the curved surface formed by bending in the bending area), the injection molding material can flow between the outer and inner sides of the curved surface through the through hole and the openings in the first protective layer and / or the second protective layer, and can also enter the inner side of the curved surface through the two ends of the first sealing channel that extend beyond the length of the side frame area of ​​the binding, thereby forming a fixing part that covers the entire outer side of the curved surface and a first support part embedded in the through hole through the mold; at the same time, a second support part that fills the gap of the entire inner side of the curved surface can also be formed by injection molding on the inner side of the curved surface.

[0210] 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 on the inner side of the curved surface formed by bending in the bending area and / or in the second protective layer on the outer side of the curved surface at the position corresponding to the through hole, and when the length of the first sealing channel in the injection molding structure of the mold is less than the length of the side frame area bound to the display panel (i.e., the curved surface formed by bending in the bending area), the injection molding material can flow between the outer and inner sides of the curved surface through the through hole and the opening in the first protective layer and / or the second protective layer, thereby forming a fixing part covering a portion of the outer side of the curved surface and a first support part embedded in the through hole through the mold; at the same time, a second support part filling the gap of the inner side of the curved surface can also be formed by injection molding on the inner side of the curved surface.

[0211] 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 dispensing adhesive to form an adhesive film on the back side of the bending area, or by bonding a photocurable monomeric adhesive film (i.e., adhesive film monomer material) to the back side of the bending area and then curing it with light (such as UV light, i.e., ultraviolet light). The first protective layer may or may not have an opening at the location of the through-hole corresponding to the bending area.

[0212] In some embodiments, the second protective layer has an opening at the location corresponding to the opening in the bending area, or the second protective layer is removed after the bending area is bent toward the back of the display panel, and then the support and fixing structure is prepared to form a first support portion embedded in the hole in the bending area.

[0213] In some embodiments, when using 3D printing to fabricate the support and fixing structure, refer to Figure 11 This is a schematic diagram of the process of preparing the support and fixing structure using 3D printing technology in this embodiment of the present disclosure. First, a high-viscosity material is used to print a barrier wall 16 on the back side of the binding side frame area J1 of the display panel 1 and the edge of the cover plate 3 near the display panel 1. A gap is formed between the barrier wall 16 and the curved surface C formed by bending the bending area 101 in the binding side frame area J1. Then, a low-viscosity liquid adhesive 17 is used to fill the gap between the barrier wall 16 and the curved surface C. Finally, the liquid adhesive 17 is cured (such as by light curing or heat curing).

[0214] In some embodiments, the barrier wall can be formed by multi-layer printing, where the thickness of the barrier wall gradually increases, and the barrier wall is formed by stacking multiple printed film layers vertically. The barrier wall can also be formed by multi-column printing, where the width of the barrier wall gradually increases, and the barrier wall is formed by stacking multiple printed film layers horizontally.

[0215] In this embodiment, during the process of forming the support and fixing structure by injection molding, pressure is applied to the liquid adhesive material forming the support and fixing structure, thereby increasing the filling density of the liquid adhesive material and improving its impact resistance.

[0216] The display device provided in this disclosure can be any product or component with display function, such as an OLED panel, OLED TV, OLED billboard, monitor, mobile phone, or navigator.

[0217] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display module, wherein, Includes a display panel having a display side and a back side, the display side and the back side being opposite to each other. The display panel includes a display area, a bending area, and a bonding area. The bending area is connected to the display area and the bonding area respectively. The bending area is bent into a curved surface towards the back side of the display panel. The bonding area is located on the back side of the display panel. The bending area has a hole, and one end of the hole is located on the display side of the display panel; A cover plate that fits onto the display side of the display panel, the cover plate covering the display panel; The middle frame surrounds the periphery of the edge of the display panel and contacts the edge of the cover plate; A supporting and fixing structure is located at least between the curved surface and the middle frame, and the supporting and fixing structure covers at least a portion of the curved surface on the outer side away from the display area of ​​the display panel. The supporting and fixing structure covers one end opening of the hole.

2. The display module according to claim 1, wherein, The holes include through holes and / or blind holes.

3. The display module according to claim 2, wherein, The number of holes is one, and the hole is located at the middle position of the bending area along its length direction; Alternatively, the number of holes is two, and the two holes are arranged at intervals along the length direction of the bending area; or, the two holes are arranged at intervals along the width direction of the bending area. Alternatively, the number of holes is three or more, and the three or more holes are arranged at intervals along the length of the bending area; The length direction of the bending zone is parallel to the bending axis of the curved surface; The width of the bending zone is perpendicular to the bending axis of the curved surface.

4. The display module according to any one of claims 1-3, wherein, The orthographic projection shape of the hole on the display panel includes a circle, an ellipse, a rectangle, or a polygon; The maximum radial dimension of the hole projected onto the display panel ranges from 0.1 to 0.6 mm. Alternatively, the maximum radial dimension of the hole projected onto the display panel ranges from 0.1 to 0.3 mm; Alternatively, the maximum radial dimension of the hole projected onto the display panel ranges from 0.2 to 0.5 mm.

5. The display module according to claim 1, wherein, It also includes a first protective layer located on the back side of the display panel. The orthographic projection of the first protective layer onto the display panel at least covers the bending area.

6. The display module according to claim 5, wherein, The hole penetrates the first protective layer.

7. The display module according to claim 1, wherein, It also includes a second protective layer located on the display side of the display panel. The second protective layer's orthographic projection on the display panel at least covers the bending area.

8. The display module according to claim 7, wherein, The hole penetrates the second protective layer.

9. The display module according to any one of claims 1-3, 5-8, wherein, The supporting and fixing structure includes a fixing part and a first supporting part, wherein the fixing part and the first supporting part are connected as a whole. The fixing part is located on the outside of the curved surface and covers at least a portion of the outer area of ​​the curved surface; The first support portion is embedded in the hole in the bending area of ​​the display panel.

10. The display module according to claim 9, wherein, It also includes 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 sequentially away from the display panel; The orthographic projections of the back film and the support film onto the display panel do not overlap with the bending area of ​​the display panel; The back film and the support film form a gap between the end face of the back film and the side of the support film near the curved surface and the inner side of the curved surface near the display area of ​​the display panel. The supporting and fixing structure further includes a second supporting part, which is located in the gap inside the curved surface and contacts the inside of the curved surface.

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

12. The display module according to claim 10, wherein, The length direction of the supporting and 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 of the curved surface. The length of the supporting and fixing structure is less than the length of the curved surface. The fixing part covers a portion of the outer side of the curved surface; The second support portion fills a section of the gap.

13. The display module according to claim 11 or 12, wherein, The second support part and the first support part are connected as one unit.

14. The display module according to claim 9, wherein, The supporting and fixing structure further includes a conductive layer located on the side of the fixing part away from the curved surface, and the conductive layer at least covers a portion of the fixing part on the side away from the curved surface. The cover plate includes a substrate and an ink layer, the ink layer being located on the side of the substrate closer to the display panel, and the ink layer surrounding the periphery of the substrate; The conductive layer is in contact with the ink layer and the middle frame, respectively.

15. The display module according to claim 14, wherein, The shapes of the contact portions of the supporting and fixing structure and the middle frame are adapted to each other.

16. The display module according to claim 15, wherein, The area of ​​the supporting and fixing structure that contacts the middle frame is provided with a first protruding structure, and the area of ​​the middle frame that contacts the supporting and fixing structure is provided with a first recessed structure. The size and shape of the first protruding structure and the first recessed structure are adapted to each other. And / or, the area of ​​the supporting and fixing structure that contacts the middle frame is provided with a second recessed structure, and the area of ​​the middle frame that contacts the supporting and fixing structure is provided with a second protruding structure, wherein the size and shape of the second recessed structure and the second protruding structure are adapted to each other.

17. The display module according to claim 10, wherein, The materials of the fixing part, the first support part and the second support part include thermoplastic organic polymer materials, and / or thermosetting organic polymer materials, and / or photocurable organic polymer materials.

18. The display module according to claim 1, wherein, The display panel includes multiple signal lines that extend from the display area to the bending area. The signal line and the hole do not overlap in their orthographic projections on the display panel.

19. The display module according to claim 18, wherein, At least a portion of the signal lines located outside the hole within the bending area have a line width smaller than that of the same signal lines within the display area.

20. The display module according to claim 18, wherein, At least a portion of the signal lines located outside the hole within the bending area follow a curved path that bends away from the hole.

21. The display module according to claim 18, wherein, At least a portion of the signal lines located outside the hole within the bending area have unequal spacing between adjacent signal lines.

22. A display device, wherein, Includes the display module as described in any one of claims 10-21.

23. A mold for injection molding the support and fixing structure in the display module according to any one of claims 1-21. in, Including injection molded structures, 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 on the back side of the display panel; In the binding side bezel area of ​​the display panel, the bending area of ​​the display panel is bent into a curved surface towards its back side; The orthographic projection of the injection-molded structure onto the display panel covers at least a portion of the area of ​​the bonded side bezel region; The injection molding structure is configured to contact the edge of the back side of the display panel and the cover plate in the display module, and to form a first sealing channel between the back side of the display panel and the cover plate. On the side of the injection-molded structure opposite to the display panel, a first opening is provided at the position of the inner hole in the bending area of ​​the display panel. The first opening is connected to the first sealing channel, and the orthographic projections of the first opening and the hole on the display panel at least partially overlap.

24. The mold according to claim 23, 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 its bending axis. The first sealing channel surrounds the entire binding side frame area.

25. The mold according to claim 23, 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 its bending axis. The first sealing channel corresponds to a portion of the area surrounding the binding side frame area.

26. The mold according to claim 23, wherein, The number of the first openings is multiple, and the multiple first openings are arranged at intervals along the length direction of the binding side frame area, and the multiple first openings correspond one-to-one with the multiple holes in the bending area; The length direction of the binding side frame area is the bending axis of the curved surface.

27. The mold according to claim 23, wherein, The orthographic projection shape of the first opening on the display module includes a circle, an ellipse, a rectangle, or a polygon; The maximum radial dimension of the first opening projected onto the display module ranges from 0.1 to 0.6 mm. Alternatively, the maximum radial dimension of the first opening projected onto the display module ranges from 0.1 to 0.3 mm. Alternatively, the maximum radial dimension of the first opening projected onto the display module ranges from 0.2 to 0.5 mm.

28. The mold according to claim 23, wherein, On the side of the injection-molded structure opposite to the display panel, at one end corresponding to the bonding side bezel area, a second opening is provided; on the other side of the injection-molded structure opposite to the display panel, at the other end corresponding to the bonding side bezel area, a third opening is provided. The second opening and the third opening are respectively connected to the first sealing channel; The second opening, the third opening, and the hole do not overlap in their orthographic projections on the display panel.

29. The mold according to claim 23, wherein, The injection-molded structure is also configured to surround the unbonded side bezel area of ​​the display panel. The orthogonal projection of the injection-molded structure onto the display panel also covers the non-bonded side bezel area; The injection-molded structure is also configured to contact the back side of the unbonded side frame area and the edge of the cover plate, and to form a second sealing channel between the unbonded side frame area and the cover plate; The second sealing channel is connected to the first sealing channel; On the side of the injection-molded structure opposite to the display panel, a fourth opening is provided at the connection position of the adjacent unbonded side bezel area. The fourth opening is connected to the second sealing channel.

30. A method for manufacturing a display module, wherein, Including the fabrication of display panels; The display panel has a display side and a back side, which are opposite to each other. The display panel includes a display area, a bending area, and a bonding area. The bending area is connected to the display area and the bonding area respectively. The bending area is bent into a curved surface towards the back side of the display panel. The bonding area is located on the back side of the display panel. The bending area has a hole, and one end of the hole is located on the display side of the display panel; A cover plate is affixed to the display side of the display panel; The cover plate covers the display panel; It also includes forming the support and fixing structure by injection molding using any one of the molds described in claims 23-29; or, preparing the support and fixing structure using a 3D printing process; Install the middle frame; The supporting and fixing structure is located at least between the curved surface and the middle frame, and the supporting and fixing structure covers at least a portion of the curved surface on the outer side away from the display area of ​​the display panel. The supporting and fixing structure covers one end opening of the hole.

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