DISPLAY MODULES, DISPLAY MODULE FABRICATION METHODS, AND DISPLAY DEVICES

Abstract

The invention relates to a display module comprising a display panel, a cover plate, and a first frame. The cover plate is located on the display side of the display portion of the display panel. The first frame is located on the cover plate near the display panel and extends along the side edge of the cover plate corresponding to the connection portion of the display panel. The first frame consists of a first retaining wall, a second retaining wall, and a first filling between them. The end of the first retaining wall is connected to the edge region of the cover plate, and the end of the second retaining wall is connected to the connection portion. The viscosity of the material for the first retaining wall and the viscosity of the material for the second retaining wall are greater than the viscosity of the material for the first filling.

Description

Display module, method for manufacturing display module, and display device

[0001] This application claims priority to Chinese patent application No. 202311423893.6, filed on October 30, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of display technology, and in particular to a display module, a method for preparing a display module, and a display device. Background Art

[0003] With the continuous development of display technology, display devices have become increasingly ubiquitous in people's lives. Organic Light-Emitting Diode (OLED) display panels, due to their advantages such as self-luminescence, low power consumption, wide viewing angle, fast response speed, and high contrast, are widely used in smart products such as mobile phones, televisions, and laptops. Narrowing the bezel is currently a key development trend for display devices.

[0004] Summary of the Invention

[0005] In one aspect, a display module is provided. The display module includes a display panel, a cover plate, and a first frame. The display panel includes a display portion, a bent portion, and a binding portion connected in sequence, wherein the bent portion is bent so that the binding portion is located on the non-display side of the display portion. The cover plate is stacked on the display side of the display portion, with the boundary of the cover plate being further away from the display portion than the boundary of the bent portion furthest from the display portion. The first frame is provided on the side of the cover plate closest to the display panel and extends along the side of the cover plate corresponding to the binding portion.

[0006] The first frame includes a first retaining wall, a second retaining wall, and a first filling portion. One end of the first retaining wall is connected to the edge area of ​​the cover plate, and one end of the second retaining wall is connected to the binding portion. A gap exists between the first retaining wall and the second retaining wall. The first filling portion is filled between the first retaining wall and the second retaining wall. The viscosity of the material used to form the first retaining wall and the second retaining wall is greater than the viscosity of the material used to form the first filling portion.

[0007] In some embodiments, the display module further includes a top cover. The top cover is connected to the first and second retaining walls at ends distal from the cover plate. The top cover, the first and second retaining walls together form a storage space, and the first filling portion fills the storage space. The top cover is provided with a plurality of through holes.

[0008] In some embodiments, the top cover includes a support layer and a main body layer that are stacked together, and the support layer is closer to the cover plate than the main body layer.

[0009] In some embodiments, the support layer includes a metal wire mesh, and the edges of the main layer are connected to the first retaining wall and the second retaining wall through meshes of the metal wire mesh.

[0010] In some embodiments, the material of the main body layer is the same as that of the first retaining wall.

[0011] In some embodiments, the width of the portion of the top cover where the through hole is provided is greater than the width of the portion where the through hole is not provided.

[0012] In some embodiments, a groove is provided on one end of each of the first retaining wall and the second retaining wall away from the cover plate, and the edge of the top cover is placed in the groove of the first retaining wall and the second retaining wall.

[0013] In some embodiments, magnetic particles or conductive particles are disposed in the first filling portion.

[0014] In some embodiments, the magnetic particles include at least one of magnetic nanoparticles and magnetic polymer particles; and the conductive particles include at least one of organic conductive particles and carbon conductive particles.

[0015] In some embodiments, the display module further includes an ink layer disposed on a side of the cover plate close to the display panel and located in an edge region of the cover plate. The first filling portion contacts the ink layer, and a portion of the first filling portion extends between the bent portion and the ink layer.

[0016] In some embodiments, the ink layer is magnetic.

[0017] In some embodiments, the bent portion is bent to form a cavity facing the display portion, and the display module further includes a third filling portion filled in the cavity formed by the bent portion. The material of the third filling portion is different from that of the first filling portion.

[0018] In some embodiments, the display module further includes a second frame, wherein the first frame and the second frame are connected to form a frame surrounding the display panel. The width of the second frame is substantially equal to the width of the first retaining wall or the second retaining wall, and the viscosity of the material used to form the second frame is greater than the viscosity of the material used to form the first filling portion.

[0019] In some embodiments, the width of the first border is greater than the width of the second border.

[0020] In some embodiments, the display module further includes a second frame, wherein the first frame and the second frame are connected to form a frame surrounding the display panel. The second frame includes a third retaining wall, a fourth retaining wall, and a second filling portion. One end of the third retaining wall is connected to the edge area of ​​the cover plate, and one end of the fourth retaining wall is connected to the display portion, with a gap between the third retaining wall and the fourth retaining wall. The second filling portion is filled between the third retaining wall and the fourth retaining wall. The viscosity of the material used to form the third retaining wall and the fourth retaining wall is greater than the viscosity of the material used to form the second filling portion.

[0021] In some embodiments, the display module includes a top cover. The top cover is connected to the first, second, third, and fourth retaining walls at ends away from the cover plate. The top cover, the first, second, third, and fourth retaining walls together form a storage space, and the first and second filling portions fill the storage space. The top cover is provided with a plurality of through holes.

[0022] In some embodiments, the display module further includes at least one fifth retaining wall, the fifth retaining wall being disposed within the accommodation space to divide the accommodation space into a plurality of sub-accommodation spaces. The top cover is provided with a plurality of through holes in an area corresponding to each of the sub-accommodation spaces.

[0023] In some embodiments, the first retaining wall, the second retaining wall, and the first filling portion form an integrated structure, and a surface of the first filling portion away from the cover plate is recessed toward the cover plate.

[0024] In some embodiments, the first retaining wall, the second retaining wall, the first filling portion, and the main body layer of the top cover form an integrated structure, and the support layer of the top cover is embedded in the integrated structure.

[0025] In another aspect, a method for manufacturing a display module is provided. The method comprises: providing a display panel, the display panel comprising a display portion, a bent portion, and a binding portion connected in sequence; bending the bent portion so that the binding portion is located on the non-display side of the display portion; laminating a cover plate on the display side of the display portion, wherein a boundary of the cover plate is further away from the display portion than a boundary of the bent portion that is farthest from the display portion; and forming a first frame on a side of the cover plate that is close to the display panel, the first frame extending along a side of the cover plate corresponding to the binding portion.

[0026] The forming of the first frame includes: forming a first retaining wall at the edge of the cover plate by a printing process; forming a second retaining wall on a side of the binding portion away from the cover plate by a printing process, with a gap between the second retaining wall and the first retaining wall; and forming a first filling portion between the first retaining wall and the second retaining wall by a printing process or a glue pouring process. The viscosity of the material used to form the first retaining wall and the second retaining wall is greater than the viscosity of the material used to form the first filling portion.

[0027] In some embodiments, the preparation method of the display module also includes: forming a top cover, the top cover is connected to the first baffle wall and the second baffle wall at one end away from the cover plate, so that the top cover, the first baffle wall and the second baffle wall are enclosed to form a receiving space; a plurality of through holes are opened on the top cover, and the plurality of through holes include at least one pouring hole and at least one exhaust hole; through a glue pouring process, the glue material is injected into the receiving space through the pouring hole, and the receiving space is vacuumed through the exhaust hole, so that the glue material fills the receiving space to form a first filling part.

[0028] In some embodiments, forming the top cover includes: forming a support layer on one end of the first retaining wall and the second retaining wall away from the cover plate; and forming a main body layer on a side of the support layer away from the cover plate through a printing process.

[0029] In some embodiments, forming the first filling portion includes: placing a glue containing conductive particles or magnetic particles between the first retaining wall and the second retaining wall; applying an electric field force or a magnetic field force to the display module to cause the glue containing conductive particles or magnetic particles to flow toward the side close to the cover plate and flow to between the cover plate and the bending portion.

[0030] In some embodiments, the forming of the first filling portion includes: forming a magnetic ink layer in an edge area of ​​the cover plate close to the display panel; setting a glue containing magnetic particles between the first retaining wall and the second retaining wall, and the magnetic particles in the glue containing magnetic particles flow toward the direction close to the magnetic ink layer under the magnetic field force of the magnetic ink layer, and flow between the cover plate and the bending portion.

[0031] In some embodiments, the method for manufacturing the display module further includes forming a second frame on a side of the cover plate adjacent to the display panel, wherein the second frame and the first frame are connected to form a frame surrounding the display panel. The second frame and the first retaining wall are formed simultaneously, or the second frame and the second retaining wall are formed simultaneously.

[0032] In some embodiments, the method for preparing the display module further includes: forming a second frame on a side of the cover plate close to the display panel, wherein the second frame and the first frame are connected to form a frame surrounding the display panel.

[0033] The forming of the second frame includes: forming a third retaining wall in the edge area of ​​the cover plate through a printing process, and the third retaining wall is formed synchronously with the first retaining wall; forming a fourth retaining wall on the side of the display part away from the cover plate through a printing process, and the fourth retaining wall is formed synchronously with the second retaining wall, and there is a gap between the fourth retaining wall and the third retaining wall; forming a second filling part between the third retaining wall and the fourth retaining wall through a printing process or a glue pouring process.

[0034] In some embodiments, before bending the bending portion so that the binding portion is located on the non-display side of the display portion, a third filling portion is formed on one side of the bending portion.

[0035] In yet another aspect, a display device is provided. The display device comprises: a display module as described in any of the above embodiments and a middle frame. The middle frame is disposed around the display module. The distance between the first border of the display module and the sidewall of the middle frame adjacent to the display module is 0 to 0.5 mm.

[0036] In some embodiments, the middle frame includes a first portion and a second portion, wherein the first portion is disposed around the display module, the second portion is connected to an end of the first portion away from the cover plate, and the second portion includes a first surface facing the cover plate. The surface of the first frame away from the cover plate contacts the first surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and do not limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, etc. involved in the embodiments of the present disclosure.

[0038] FIG1A is a structural diagram of a display device according to the related art;

[0039] FIG1B is a cross-sectional structural diagram of the display device along section line JJ in FIG1A ;

[0040] FIG2 is a structural diagram of a display device according to some embodiments;

[0041] FIG3A is a cross-sectional structural diagram of the display device along section line ZZ in FIG2 ;

[0042] FIG3B is a rear structural diagram of the display device in FIG3A ;

[0043] FIG4 is a structural diagram of a display module according to some embodiments;

[0044] FIG5 is another structural diagram of a display module according to some embodiments;

[0045] FIG6 is another structural diagram of a display module according to some embodiments;

[0046] FIG7 is another structural diagram of a display module according to some embodiments;

[0047] FIG8 is a cross-sectional structural diagram of the display device along section line KK in FIG1A ;

[0048] FIG9 is another rear structural diagram of a display module according to some embodiments;

[0049] FIG10 is a cross-sectional structural diagram of the display device along section line II in FIG2 ;

[0050] FIG11 is another rear structural diagram of a display module according to some embodiments;

[0051] FIG12 is another rear structural diagram of a display module according to some embodiments;

[0052] FIG13 is another rear structural diagram of a display module according to some embodiments;

[0053] FIG14 is another rear structural diagram of a display module according to some embodiments;

[0054] FIG15 is another rear structural diagram of a display module according to some embodiments;

[0055] FIG16 is a flow chart of a method for preparing a display module according to some embodiments;

[0056] FIG17 is a structural diagram of a display module corresponding to step R1 in a method for manufacturing a display module according to some embodiments;

[0057] FIG18 is a structural diagram of a display module corresponding to step R2 in a method for manufacturing a display module according to some embodiments;

[0058] FIG19 is a flow chart of step R3 in a method for manufacturing a display module according to some embodiments;

[0059] FIG20 is a structural diagram of a display module corresponding to step R3 in a method for manufacturing a display module according to some embodiments;

[0060] FIG21 is a flow chart of step R33 in a method for manufacturing a display module according to some embodiments;

[0061] FIG22 is a structural diagram of a display module corresponding to step R33 in a method for manufacturing a display module according to some embodiments;

[0062] FIG23 is a structural diagram of a display module corresponding to step R331 in a method for manufacturing a display module according to some embodiments;

[0063] FIG24 is another flow chart of step R33 in the method for manufacturing a display module according to some embodiments;

[0064] FIG25 is another structural diagram of a display module corresponding to step R33 in the method for manufacturing a display module according to some embodiments;

[0065] FIG26 is another structural diagram of a display module corresponding to step R33 in the method for manufacturing a display module according to some embodiments;

[0066] FIG27 is a flow chart of step R1 in a method for manufacturing a display module according to some embodiments;

[0067] FIG28 is a structural diagram of a display module corresponding to step R1 in a method for manufacturing a display module according to some embodiments;

[0068] FIG29 is another flow chart of a method for preparing a display module according to some embodiments;

[0069] FIG30 is a structural diagram of a display module corresponding to step R4 in a method for manufacturing a display module according to some embodiments;

[0070] FIG31 is another structural diagram of a display module corresponding to step R4 in the method for manufacturing a display module according to some embodiments;

[0071] FIG32 is another structural diagram of a display module corresponding to step R4 in the method for manufacturing a display module according to some embodiments;

[0072] FIG33A is a cross-sectional structural diagram of the display module along section line HH in FIG32;

[0073] FIG33B is a cross-sectional structural diagram of the display module along section line GG in FIG32 ;

[0074] FIG34 is another flow chart of a method for manufacturing a display module according to some embodiments;

[0075] FIG35 is a structural diagram of a display module corresponding to step R31′ in a method for manufacturing a display module according to some embodiments;

[0076] FIG36 is another structural diagram of a display module corresponding to step R31′ in the method for manufacturing a display module according to some embodiments;

[0077] FIG37 is another flow chart of a method for manufacturing a display module according to some embodiments;

[0078] FIG38 is a structural diagram of a display module corresponding to step R31A in a method for manufacturing a display module according to some embodiments;

[0079] FIG39 is a structural diagram of a display module corresponding to step R32A in a method for manufacturing a display module according to some embodiments;

[0080] FIG40 is a structural diagram of a display module corresponding to step R33A in a method for manufacturing a display module according to some embodiments;

[0081] FIG41 is a flow chart of step R33A in a method for manufacturing a display module according to some embodiments;

[0082] FIG42 is a structural diagram of a display module corresponding to step R331A in a method for manufacturing a display module according to some embodiments;

[0083] FIG43 is a structural diagram of a display module corresponding to step R332A in a method for manufacturing a display module according to some embodiments;

[0084] FIG. 44 is a structural diagram of a display module corresponding to step R3A in a method for preparing a display module according to some embodiments. DETAILED DESCRIPTION

[0085] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0086] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0087] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0088] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0089] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0090] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0091] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0092] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0093] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0094] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0095] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0096] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0097] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0098] It should be noted that, for example, 217 / 218 appearing in the drawings of the present disclosure indicates that the component may be 217 or 218, and other similar numbers appearing in the drawings also follow the above description.

[0099] For the convenience of the following description, an XYZ coordinate system is established. The Z direction is the thickness direction of the display device 1000, the XY plane is perpendicular to the Z direction, and the X direction intersects the Y direction. For example, the X direction and the Y direction are perpendicular to each other.

[0100] As shown in FIG1A , FIG1A is a structural diagram of a display device 1000′ provided in the related art. Display device 1000′ includes a display module 100′ and a middle frame 200. Middle frame 200 is disposed around display module 100′. Display module 100′ includes a left frame 101, a bottom frame 102, a right frame 103, and a top frame 104.

[0101] As shown in Figure 1B, Figure 1B is a cross-sectional view of the display device 1000' along section line JJ in Figure 1A. Display module 100' includes a display panel 10. Display panel 10 includes a display portion 11, a bent portion 12, and a binding portion 13 connected in sequence. The bent portion 12 is bent so that the binding portion 13 is located on the non-display side 11b of the display portion 11. The bent portion 12 and the binding portion 13 are located at the bottom frame 102 of the display module.

[0102] The display portion 11 includes a display area AA (ie, an area of ​​the display portion 11 for image display) and a non-display area BB surrounding the display area (ie, an area of ​​the display portion 11 surrounding the display area AA).

[0103] The middle frame 200 includes an inner wall 200 a and an outer wall 200 b .

[0104] The width of the bottom frame 102 of the display module 100' is the distance from the boundary between the display area AA and the non-display area BB of the display portion 11 to the inner sidewall 200a of the middle frame 200 on the same side as the bottom frame 102, that is, the distance from the dotted line B to the dotted line E along the X direction in Figure 1B. The width of the bottom frame 102 includes h1', h2, and h3.

[0105] Among them, h1' is the width from the tangent line of the outer edge of the bending portion 12 in the Z direction to the inner side wall 200a of the middle frame 200; h2 is the width of the bending portion 12 in the X direction; h2 is the width of the bending portion 12 along the X direction after bending; h3 is the width of the portion of the non-display area BB of the display portion 11 located at the position of the lower frame 102.

[0106] To increase the display area AA of the display portion 11 in the display module 100', the width of the lower bezel 102 needs to be reduced. The size of h3 is related to the circuit design of the display panel 10 and is affected by the processing accuracy, making it difficult to reduce the value of h3. The size of h2 can be achieved by reducing the bending radius of the bent portion 12. However, when the bending radius is reduced, the risk of the bent portion 12 breaking increases, and reliability during subsequent use is difficult to ensure. Furthermore, because the bent portion 12 of the display panel 10 is relatively fragile, it is prone to shaking when the display device 1000' falls or rolls. At the same time, the inner sidewall 200a of the middle frame 200 is prone to deformation when subjected to external forces. If the middle frame 200 is too close to the bent portion 12, the middle frame 200 will squeeze the bent portion 12 of the display panel 10, causing abnormal display of the display panel 10. Therefore, a certain gap must be maintained between the middle frame 200 and the bent portion 12. Specifically, h1' must have a certain width to prevent the inner sidewall 200a of the middle frame 200 from deforming and striking the bent portion 12 of the display panel 10 during a drop or tumble of the display device 1000'. Reducing h1' to reduce the width of the lower frame 102 would reduce the drop reliability of the display device 1000'.

[0107] Based on this, as shown in FIG2 , some embodiments of the present disclosure provide a display device 1000 . The display device 1000 includes a display module 100 and a middle frame 200 . The middle frame 200 is disposed around the display module 100 to support the display module 100 .

[0108] For example, the display device 1000 can be any product or component with a display function, such as a television, a monitor, a laptop computer, a tablet computer, a mobile phone, a navigator, etc. FIG2 illustrates the display device 1000 as a mobile phone.

[0109] For example, the display device 1000 may be a liquid crystal display (LCD); the display device 1000 may also be an electroluminescent display or a photoluminescent display. If the display device 1000 is an electroluminescent display, the electroluminescent display may be an organic light-emitting diode (OLED) or a quantum dot light-emitting diode (QLED). If the display device 1000 is a photoluminescent display, the photoluminescent display may be a quantum dot photoluminescent display.

[0110] The display module 100 includes a display area and a frame area surrounding the display area. The display area of ​​the display module 100 and the display area AA of the display portion 11 are the same area. The frame area of ​​the display module 100 includes a left frame 101, a bottom frame 102, a right frame 103, and an upper frame 104. It should be understood that the directional terms such as "upper," "lower," "left," and "right" used in describing the frame of the display module 100 in the embodiments of the present application are primarily based on the orientation of the display module 100 shown in FIG. 2 , with the negative direction of the X-axis being the bottom, the positive direction of the X-axis being the top, the negative direction of the Y-axis being the left, and the positive direction of the Y-axis being the right.

[0111] The structure of the display module 100 is described in detail below.

[0112] Figure 3A is a cross-sectional view of the display device 1000 along section line ZZ in Figure 2. As shown in Figure 3A, the display module 100 includes a display panel 10. The display panel 10 includes a display portion 11, a bending portion 12, and a binding portion 13 connected in sequence.

[0113] The display portion 11 of the display panel 10 is used to display images. The display portion 11 includes a display area AA for displaying images. In a display device 1000 with a high screen-to-body ratio, such as a full-screen display, almost the entire area of ​​the display portion 11 is the display area AA. In a display device 1000 with a lower screen-to-body ratio, the display portion 11 also includes a non-display area BB surrounding the display area AA. In this case, the display portion 11 includes the non-display area BB at the bottom frame 102 of the display module.

[0114] In order to realize the screen display function of the display panel 10 , a display device is formed in the display portion 11 .

[0115] For example, the display device may be an organic light emitting diode (OLED) device or a liquid crystal display device, and the selection may be made according to actual needs of the user.

[0116] For example, when the display panel 10 is an OLED display panel, the OLED display panel includes: an array substrate and a pixel defining layer located on the array substrate, wherein an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and a cathode are sequentially arranged in the pixel defining area of ​​the pixel defining layer.

[0117] For another example, when the display panel 10 is a liquid crystal display panel, the liquid crystal display panel includes an array substrate and a color filter substrate that are arranged in a cell-to-cell manner, and a liquid crystal layer located between the array substrate and the color filter substrate.

[0118] The bending portion 12 is bendable, and through the bending action of the bending portion 12, the binding portion 13 is arranged on the non-display side 11b of the display portion 11. In order to realize the bending of the bending portion 12 of the display panel 10, the display panel 10 in this embodiment can be a flexible display panel, which is made of a flexible material. The selected flexible material can be made of polymer materials such as polyethylene terephthalate, polyarylethersulfone, polyethylene naphthalate, polyimide, etc. It should be noted that the present disclosure does not specifically limit the material of the flexible display panel. No matter what material is selected (including all flexible materials that can be used as flexible substrates in the prior art), it needs to have a certain degree of stretchability to form a flexible display substrate. In the specific preparation process, it is necessary to select a flexible material that meets the stretchability requirements based on the actual needs of the display panel 10.

[0119] For example, the display panel 10 may be bent by the bending portion 12, while the display portion 11 and the binding portion 13 on either side thereof are not bent. The display panel 10 may also be bent by the bending portion 12 with a large bending, while a portion of the display portion 11 near its edge may be slightly bent, thereby forming a curved display device.

[0120] For example, the outer wall of the bent portion 12 of the display panel 10 (the side wall of the bent portion 12 close to the middle frame 200) can be covered with a protective adhesive layer 70 to reduce the probability of breakage of the display panel 10. The protective adhesive layer 70 can be, for example, an MCL (Micro Coating Layer).

[0121] It should be understood that Figure 3A only shows the edge of the display portion 11, i.e., the portion of the display portion 11 corresponding to the binding portion 13. In reality, the display portion 11 continues to extend along the X direction (rightward) in Figure 3A , and the binding portion 13, after being bent to the non-display side 11 b of the display portion 11, only corresponds to a partial area of ​​the display portion 11.

[0122] The binding portion 13 can be located on any of the top, bottom, left, or right sides of the display unit 11, that is, at any location among the left frame 101, bottom frame 102, right frame 103, and top frame 104 of the display module. The display device 1000 may further include multiple binding portions 13, which can be located on at least two of the top, bottom, left, or right sides of the display unit 11, that is, at any two of the left frame 101, bottom frame 102, right frame 103, and top frame 104 of the display module. The following description uses the example of the binding portion 13 being located on the bottom side of the display unit 11, that is, at the bottom frame 102 of the display module.

[0123] 3A , the display module 100 further includes a cover plate 30 . The cover plate 30 is stacked on the display side 11 a of the display portion 11 . The cover plate 30 can isolate the display panel 10 from the external environment and provide protection for the display panel 10 .

[0124] Among them, the boundary of the cover plate 30 is farther away from the display part 11 than the boundary of the bending part 12 farthest from the display part 11, that is, the orthographic projection of the boundary of the bending part 12 farthest from the display part 11 on the cover plate 30 falls into the cover plate 30 and has a distance d1 between it and the boundary of the cover plate 30.

[0125] Exemplarily, the cover plate 30 may be a single-layer cover plate, or may be a multi-layer cover plate 30 laminated together by adhesive.

[0126] Exemplarily, the cover plate 30 can be a silicate glass cover plate, a curved glass or an ultra-thin glass; at the same time, the cover plate 30 can also be a flexible polymer film cover plate, which can be transparent polyimide or PET or polyurethane, etc., and can also be a combination of the above layers of polymer films, or a combination of polymer film and glass.

[0127] The middle frame 200 is disposed around the display panel 10 (specifically, the display panel 10 after the middle frame 200 is bent around the binding portion 13 to the back of the display portion 11). The middle frame 200 includes an inner sidewall 200a and an outer sidewall 200b. The inner sidewall 200a is the sidewall of the middle frame 200 close to the bending portion 12, and the outer sidewall 200b is the sidewall of the middle frame 200 away from the bending portion 12.

[0128] As shown in Figures 3A and 3B, Figure 3B is a structural diagram of the back side of the display device 1000 in Figure 2 (i.e., the side of the display device 1000 where the binding portion 13 is located). The display module 100 also includes a first frame 21. The first frame 21 is disposed on the side of the cover plate 30 adjacent to the display panel 10 and extends along the side of the cover plate 30 corresponding to the binding portion 13. A portion of the first frame 21 is located between the bent portion 12 and the inner sidewall 200a of the middle frame 200.

[0129] It should be noted that the dotted lines on both sides of the first frame 21 in FIG. 3B refer to the boundaries of the first frame 21 in the Y direction.

[0130] By providing a first frame 21 between the bend portion 12 and the inner sidewall 200a of the middle frame 200, the first frame 21 can protect the bend portion 12 during a drop or tumble of the display device 1000. Compared to the related art shown in FIG1B , the embodiment shown in FIG3A protects the bend portion 12 during a drop or tumble of the display device 1000 by providing the first frame 21. This can reduce the distance between the tangent line of the outer edge of the bend portion 12 in the Z direction and the inner sidewall 200a of the middle frame 200. That is, the width h1 of the tangent line of the outer edge of the bend portion 12 in the Z direction to the inner sidewall 200a of the middle frame 200 in FIG3A is smaller than the width h1' of the tangent line of the outer edge of the bend portion 12 in the Z direction to the inner sidewall 200a of the middle frame 200 in FIG1B . This helps to reduce the size of the lower frame 102 of the display module 100, further achieving a narrow frame for the display device 1000.

[0131] The first frame 21 can be made of a material with a relatively low elastic modulus to provide a buffer for deformation of the middle frame 200 when the middle frame 200 is subjected to external impact, thereby preventing stress from being transmitted to the bent portion 12. The elastic modulus of the first frame 21 is smaller than that of the middle frame 200, and a material such as resin can be used.

[0132] In some embodiments, as shown in FIG. 3A , a distance S1 between the first frame 21 and the inner sidewall 200 a of the middle frame 200 is 0 mm to 0.5 mm.

[0133] For example, the distance S1 between the first frame 21 and the inner sidewall 200 a of the middle frame 200 may be 0, 0.1 mm, 0.12 mm, 0.2 mm, 0.26 mm, 0.3 mm, 0.36 mm, 0.4 mm, 0.46 mm, or 0.5 mm.

[0134] The distance S1 between the first frame 21 and the inner sidewall 200a of the middle frame 200 can be 0. In this case, the first frame 21 and the inner sidewall 200a of the middle frame 200 are in contact, and the width h1 of the tangent line of the outer edge of the bent portion 12 in the Z direction to the inner sidewall 200a of the middle frame 200 is reduced to a minimum, greatly reducing the width of the lower frame 102 of the display module 100. The distance S1 between the first frame 21 and the inner sidewall 200a of the middle frame 200 can be greater than 0. In this case, there is a gap between the first frame 21 and the inner sidewall 200a of the middle frame 200 to meet the process margin of the display module assembly and provide space for stress release for deformation of some components in the display module (such as deformation caused by thermal expansion and contraction).

[0135] It can be understood that when there is a gap between the first frame 21 and the inner wall 200a of the middle frame 200, the width of the gap can be much smaller than the width of the gap between the bending portion and the middle frame in the related art. Therefore, even if there is a gap between the first frame 21 and the inner wall 200a of the middle frame 200, the effect of reducing the width of the lower frame 102 of the display module 100 is still achieved.

[0136] In some embodiments, as shown in Figure 3A, the middle frame 200 includes a first part 201 and a second part 202. The first part 201 is arranged around the display module 100, and the second part 202 is connected to the end of the first part 201 away from the cover plate 30. The second part 202 and the first part 201 are combined in an "L" shape.

[0137] The second part 202 includes a first surface 202a facing the cover plate 30, and the surface of the first frame 21 away from the cover plate 30 is in contact with the first surface 202a, so that the second part 202 of the middle frame 200 supports the first frame 21, which is beneficial to improving the stability of the first frame 21 and further improving the protection effect of the bent portion 12 of the display panel 10.

[0138] In some embodiments, as shown in FIG3A , the display module 100 further includes a first backing film 51 and a second backing film 52. The first backing film 51 is disposed on the non-display side 11 b of the display portion 11, and the second backing film 52 is disposed on a side of the binding portion 13 closer to the display portion 11 and closer to the display portion 11 than the binding portion 13.

[0139] By setting the first back film 51 and the second back film 52, when the display panel 10 is bent through the bending action of the bending portion 12 so that the binding portion 13 is set on the non-display side of the display portion 11, the first back film 51 and the second back film 52 can respectively provide supporting force to the display portion 11 and the binding portion 13 of the display panel 10 to achieve a better bending effect.

[0140] Illustratively, the material of the first back film 51 and the second back film 52 may be one of polyethylene terephthalate (PET), polyimide (PI), or cycloolefin polymer (COP).

[0141] For example, the first back film 51 and the display portion 11 , and the second back film 52 and the binding portion 13 may be adhered by using an optically clear adhesive (OCA), which helps to ensure the light transmittance of the display panel 10 .

[0142] 3A , the display module 100 further includes a heat dissipation film 80 . The heat dissipation film 80 is laminated on a side of the first back film 51 away from the display portion 11 and disposed between the display portion 11 and the binding portion 13 to dissipate heat.

[0143] Exemplarily, the heat dissipation film 80 may be a composite film composed of mesh glue, foam and copper foil.

[0144] In some embodiments, as shown in FIG. 3A , the display module 100 further includes a spacer 42 . The spacer 42 is disposed between the second back film 52 and the heat dissipation film 80 , and can increase the strength of the display portion 11 of the display panel 10 .

[0145] In some embodiments, as shown in FIG3A , the display module 100 further includes an adhesive layer 41 . The adhesive layer 41 is disposed between the cover plate 30 and the display panel 10 and is used to adhere the cover plate 30 to the display panel 10 .

[0146] Illustratively, the adhesive layer 41 may be OCA (Optically Clear Adhesive) or OCR (Optically Clear Resin).

[0147] In some embodiments, as shown in FIG3A , the display module 100 further includes an ink layer 90. The ink layer 90 is disposed on a side of the cover plate 30 close to the display panel 10 and located at an edge of the cover plate 30. The main function of the ink layer 90 is to prevent light leakage from the sides of the display panel 10.

[0148] In some embodiments, as shown in FIG3A , the display module 100 further includes an FPC cable 60. The FPC cable 60 is disposed on a side of the binding portion 13 away from the display portion 11. The display module 100 further includes a driver chip (not shown) for providing control signals to the display panel 10. The FPC cable 60 is connected to the driver chip to transmit the control signals provided by the driver chip to the display panel 10.

[0149] The structure of the first frame 21 in the display module 100 is described in detail below.

[0150] As shown in FIG4 , the first frame 21 includes a first retaining wall 211, a second retaining wall 212, and a first filling portion 213. The first end 211a of the first retaining wall 211 is connected to the edge of the cover plate 30, and the first end 212a of the second retaining wall 212 is connected to the binding portion 13. A distance d2 is defined between the first retaining wall 211 and the second retaining wall 212. The first filling portion 213 is positioned between the first retaining wall 211 and the second retaining wall 212.

[0151] It is understood that in the embodiment of the present disclosure, the first retaining wall 211 and the second retaining wall 212 can be formed using a printing process, and the first filling portion 213 can be formed using a printing or glue pouring process. In order to enable the first filling portion 213 to more fully cover the bent portion 12 and better protect the bent portion 12, the material used to form the first filling portion 213 can be made of a material with low viscosity. In this way, when the first filling portion 213 is formed by printing or glue pouring, the material of the first filling portion 213 can more easily flow toward the cover plate 30 to cover more of the bent portion 12.

[0152] The first retaining wall 211 and the second retaining wall 212 serve as a barrier for the first filling portion 213 to prevent the material from overflowing. Furthermore, to improve the forming efficiency of the printed first retaining wall 211 and the second retaining wall 212, the material used to form the first retaining wall 211 and the second retaining wall 212 can be a material with a higher viscosity. Specifically, the viscosity of the material used to form the first retaining wall 211 and the second retaining wall 212 is greater than the viscosity of the material used to form the first filling portion 213.

[0153] As mentioned above, the first frame 21 can be made of a material with a relatively low elastic modulus. On this basis, for example, the material used to form the first retaining wall 211, the second retaining wall 212 and the first filling portion 213 can be polyimide or epoxy resin.

[0154] In some embodiments, the materials used to form the first retaining wall 211, the second retaining wall 212, and the first filling portion 213 are the same, but differ in viscosity. Thus, after curing, the first retaining wall 211, the second retaining wall 212, and the first filling portion 213 form a single unitary structure, i.e., the first frame 21 forms a single unitary structure. It should be understood that the term "same material" means that the first retaining wall 211, the second retaining wall 212, and the first filling portion 213 are primarily made of the same material. The first retaining wall 211, the second retaining wall 212, and the first filling portion 213 may contain other materials of different types, or other materials of the same type but in different proportions. For example, by adding different proportions of other materials to the same primary material, the viscosity of the first filling portion 213 can be reduced, while the viscosity of the first retaining wall 211 and the second retaining wall 212 can be increased.

[0155] On this basis, as shown in Figure 5, since the viscosity of the material used to form the first filling portion 213 is relatively low, that is, the fluidity of the material used to form the first filling portion 213 is relatively high, the material for forming the first filling portion 213 arranged between the first retaining wall 211 and the second retaining wall 212 has its first surface 213a (that is, the side surface of the first filling portion 213 away from the cover plate 30) slightly concave toward the cover plate 30 after solidification, that is, the side surface of the first filling portion 213 away from the cover plate 30 is uneven.

[0156] In some embodiments, as shown in FIG5 , the first frame 21 further includes a top cover 214 , and a plurality of through holes 215 are formed on the top cover 214 . The through holes 215 may include a pouring hole 2151 and an exhaust hole 2152 .

[0157] The top cover 214 is connected to one end of the first retaining wall 211 and the second retaining wall 212 away from the cover plate 30 , that is, the top cover 214 is connected to the second end 211 b of the first retaining wall 211 and the second end 212 b of the second retaining wall 212 .

[0158] The top cover 214 , the first retaining wall 211 and the second retaining wall 212 enclose a receiving space f1 , and the first filling portion 213 fills the receiving space f1 .

[0159] The glue used to form the first filling portion 213 can enter the accommodating space f1 through the pouring hole 2151, and the exhaust hole 2152 can be used to evacuate the accommodating space f1, which is beneficial for the glue used to form the first filling portion 213 to flow toward the side close to the cover plate 30 and flow to between the cover plate 30 and the bending portion 12, that is, the area f11 surrounded by the dotted box in Figures 7 and 8, which can increase the contact area between the first filling portion 213 and the bending portion 12, which is beneficial for further protecting the bending portion 12 of the display panel 10 and improving the anti-extrusion strength of the bending portion 12 of the display panel 10.

[0160] On this basis, as shown in FIG5 , the ends of the first retaining wall 211 and the second retaining wall 212 away from the cover plate 30, i.e., the second end 211b of the first retaining wall 211 and the second end 212b of the second retaining wall 212, are both provided with a groove 216. The edge of the top cover 214 can be placed in the groove 216, which helps to improve the stability of the top cover 214.

[0161] 6 , the top cover 214 may include a stacked support layer 2141 and a main body layer 2142 , wherein the support layer 2141 is closer to the cover plate 30 than the main body layer 2142 . The support layer 2141 is used to support the main body layer 2142 , thereby further improving the stability of the top cover 214 .

[0162] The material of the support layer 2141 may include, for example, a metal mesh. When the material of the support layer 2141 is a metal mesh, the edge of the main body layer 2142 may be connected to the first retaining wall 211 and the second retaining wall 212 through the mesh of the metal mesh.

[0163] The material used to form the main layer 2142 can be, for example, the same as the material used to form the first retaining wall 211 or the second retaining wall 212. Since the viscosity of the material used to form the first retaining wall 211 or the second retaining wall 212 is greater than the viscosity of the material used to form the first filling part 213, the viscosity of the material used to form the main layer 2142 is greater than the viscosity of the first filling part 213, which is beneficial to molding when forming the main layer 2142 through the printing process and improves the molding rate.

[0164] In some embodiments, when the materials used to form the first retaining wall 211, the second retaining wall 212, the first filling part 213 and the main layer 2142 are the same, the first retaining wall 211, the second retaining wall 212, the first filling part 213 and the main layer 2142 after molding are an integrated structure, and the support layer 2141 is embedded in the integrated structure formed by the above-mentioned first retaining wall 211, the second retaining wall 212, the first filling part 213 and the main layer 2142.

[0165] In some embodiments, as shown in FIG. 7 , magnetic particles 217 are disposed in the first filling portion 213 .

[0166] During the process of forming the first filling portion 213, a magnetic field force is applied on the side of the display module 100 close to the cover plate 30, and the magnetic particles 217 move toward the cover plate 30 under the action of the magnetic field force, which is beneficial for the glue used to form the first filling portion 213 to flow toward the side close to the cover plate 30 and flow to between the cover plate 30 and the bending portion 12, that is, the area f11 surrounded by the dotted box in Figure 10, which can increase the contact area between the first filling portion 213 and the bending portion 12, which is beneficial for further protecting the bending portion 12 of the display panel 10 and improving the compressive strength of the bending portion 12 of the display panel 10.

[0167] Alternatively, the material of the ink layer 90 is set to magnetic ink. In the process of forming the first filling portion 213, the glue used to form the first filling portion 213 flows toward the side close to the cover plate 30 under the action of the magnetic field force of the magnetic ink, and flows to between the cover plate 30 and the bending portion 12, that is, the area f11 surrounded by the dotted box in Figure 10. The formed first filling portion 213 is in contact with the ink layer 90, and part of the first filling portion 213 extends to between the bending portion 12 and the ink layer 90, which can increase the contact area between the first filling portion 213 and the bending portion 12, which is beneficial to further protect the bending portion 12 of the display panel 10 and improve the compressive strength of the bending portion 12 of the display panel 10.

[0168] Exemplarily, the magnetic particles 217 include at least one of magnetic nanoparticles and magnetic polymer particles, such as magnetic ferrosoferric oxide or polystyrene microspheres.

[0169] Exemplarily, the diameter of the magnetic particles 217 is 50 nm to 100 nm, for example, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm or 100 nm.

[0170] Exemplarily, the concentration of the magnetic particles 217 in the first filling portion 213 is 3% to 10%, for example, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10%.

[0171] In other embodiments, as shown in FIG7 , conductive particles 218 are provided in the first filling portion 213. By providing the conductive particles 218 in the first filling portion 213, the conductive particles 218 move toward the cover plate 30 under the action of the electric field force. In the process of forming the first filling portion 213, by applying the electric field force on the side of the display module 100 outside the cover plate 30, the adhesive used to form the first filling portion 213 flows toward the side close to the cover plate 30 and flows between the cover plate 30 and the bent portion 12, that is, the area f11 surrounded by the dotted line frame in FIG10 . This can increase the contact area between the first filling portion 213 and the bent portion 12, further protecting the bent portion 12 of the display panel 10 and improving the compressive strength of the bent portion 12 of the display panel 10.

[0172] Illustratively, the conductive particles 218 include at least one of organic conductive particles or carbon conductive particles. When the conductive particles 218 are organic conductive particles, they may be, for example, polypropylene conductive particles, polystyrene conductive particles, or polyaniline conductive particles. When the conductive particles 218 are carbon conductive particles, they may be, for example, graphene conductive particles.

[0173] Exemplarily, the diameter of the conductive particles 218 is 3 μm to 5 μm, for example, 3 μm, 3.5 μm, 4 μm, 4.5 μm or 5 μm.

[0174] Exemplarily, the concentration of the conductive particles 218 in the first filling portion 213 is 10% to 15%, for example, 10%, 11%, 12%, 13%, 14% or 15%.

[0175] In some embodiments, as shown in Figures 4 to 7 , the display module 100 further includes a third filling portion 219. The bent portion 12 of the display panel 10 is bent to form a cavity facing the display portion 11, and the third filling portion 219 fills the cavity formed by the bent portion 12. Filling the cavity of the bent portion 12 facing the display portion 11 with the third filling portion 219 further protects the bent portion 12 and helps further improve the anti-compression strength of the bent portion 12.

[0176] Exemplarily, the material used to form the third filling portion 219 can be the same as the material used to form the first filling portion 213. For example, as shown in Figures 5 and 6, the first frame 21 includes a top cover 214. In the process of forming the first filling portion 213 through a glue pouring process, the material used to form the first filling portion 213 enters the accommodating space f1 through the pouring port 2151. The exhaust hole 2152 is used to vacuum the accommodating space f1. When the accommodating space f1 is in a vacuum state, since the accommodating space f1 is connected to the cavity formed by the bending portion 12 bending toward the display portion 11, the material used to form the first filling portion 213 enters the cavity formed by the bending portion 12 bending toward the display portion 11 to form the third filling portion 219. In this case, the material used to form the third filling portion 219 is the same as the material used to form the first filling portion 213.

[0177] In the above embodiment, the first filling portion 213 and the third filling portion 219 are formed simultaneously. In other embodiments, the first filling portion 213 and the third filling portion 219 may be made of the same material but may be formed in different steps. For example, before the folding portion 12 is bent so that the binding portion 13 is located on the non-display side 11b of the display portion 11, the third filling portion 219 may be formed on one side of the folding portion 12. The folding portion 12 may then be bent again, and then the first frame 21 including the first filling portion 213 may be formed.

[0178] The material used to form the third filling portion 219 may also be different from the material used to form the first filling portion 213. For example, as shown in FIG7 , before the bent portion 12 is bent so that the binding portion 13 is located on the non-display side 11 b of the display portion 11, the third filling portion 219 is pre-formed on one side of the bent portion 12. The bent portion 12 is then bent again, and then the first frame 21 including the first filling portion 213 is formed. The material used to form the third filling portion 219 is different from the material used to form the first filling portion 213.

[0179] Referring again to FIG1A , when the bent portion 12 and the binding portion 13 of the display panel 10 are only provided at the lower frame 102 , the structures of the display device 1000 ′ at the corresponding locations on the left frame 101 , right frame 103 , and upper frame 104 of the display module 100 ′ are substantially the same. The following description uses the structure of the display device 1000 ′ at the corresponding location on the left frame 101 of the display module 100 ′ as an example. FIG8 is a cross-sectional view of the display device 1000 ′ along section line KK in FIG1A .

[0180] As shown in FIG8 , the width of the left frame 101 of the display module 100 ′ is the distance from the boundary between the display area AA and the non-display area BB of the display portion 11 to the inner sidewall 200 a of the middle frame 200 on the same side as the left frame 101, i.e., the distance from the dotted line L to the dotted line N along the Y direction in FIG11 . The width of the left frame 101 includes h4 ′ and h5 .

[0181] Wherein, h4 ′ is the distance from the edge of the display portion 11 to the inner sidewall 200 a of the middle frame 200 ; and h5 is the width of the non-display area BB of the display portion 11 at the position of the left frame 101 .

[0182] In order to increase the proportion of the display area AA of the display portion 11 in the display module 100', the width of the left frame 101 needs to be reduced. Among them, the size of h5 is related to the circuit design of the display panel 10 and is affected by the processing accuracy, so it is difficult to reduce the value of h5. In addition, when the display device 1000' falls or rolls over, the inner side wall 200a of the middle frame 200 is easily deformed when subjected to external force. If the distance between the middle frame 200 and the display portion 11 is too close, the middle frame 200 will squeeze the display portion 11 of the display panel 10, causing the display panel 10 to display abnormally. Therefore, a certain gap must be maintained between the middle frame 200 and the bending portion 12, that is, h4' needs to have a certain width to avoid the problem that the inner side wall 200a of the middle frame 200 deforms and hits the display portion 11 of the display panel 10 during the display device 1000' falling or rolling. If the value of h4 ′ is reduced in order to reduce the width of the left frame 101 , the drop reliability of the display device 1000 ′ will be reduced.

[0183] Based on this, as shown in Figure 9, which is a structural diagram of a display module 100 in some embodiments of the present disclosure, the display module 100 also includes a second frame 22. The first frame 21 and the second frame 22 are connected to form a frame surrounding the display panel 10. The second frame 22 is provided at least on the left frame 101, the right frame 103, and the top frame 104 of the display module 100.

[0184] The above-mentioned “the second frame 22 is at least arranged on the left frame 101, the right frame 103 and the top frame 104 of the display module 100” means that: the second frame 22 can be arranged only on the left frame 101, the right frame 103 and the top frame 104 of the display module 100, and its ends are respectively connected to the ends of the first frame 21 at the junction of the left frame 101 and the bottom frame 102, and at the junction of the right frame 103 and the bottom frame 102; or, the ends of the second frame 22 can also extend to the bottom frame 102 of the display module 100 and be connected to the ends of the first frame 21 in the bottom frame 102, that is, the second frame 22 is arranged on the left frame 101, the bottom frame 102, the right frame 103 and the top frame 104 of the display module 100.

[0185] It is understandable that when the second frame 22 is set on the left frame 101, the bottom frame 102, the right frame 103 and the top frame 104 of the display module 100, in the bottom frame 102, the second frame 22 is set in the area of ​​the bottom frame 102 where the first frame 21 is not set.

[0186] Since the structures of the display device 1000 at the corresponding positions of the left frame 101, right frame 103, and top frame 104 of the display module 100 are substantially the same, the following description will take the structure of the display device 1000 at the corresponding position of the left frame 101 of the display module 100 as an example. FIG10 is a cross-sectional view of the display device 1000 along section line II in FIG2.

[0187] As shown in Figure 10, the second frame 22 is arranged between the edge of the display part 11 of the display panel 10 and the inner wall 200a of the middle frame 200, and is used to protect the edge of the display part 11 of the display panel 10, so as to prevent the inner wall 200a of the middle frame 200 from deforming and hitting the display part 11 of the display panel 10 when the display device 1000 falls or rolls, which is beneficial to ensure the normal display of the display panel 10.

[0188] By providing a second frame 22 between the edge of the display portion 11 of the display panel 10 and the inner sidewall 200a of the middle frame 200, the second frame 22 can protect the display portion 11 during a drop or tumble of the display device 1000. Compared with the related art shown in FIG11 , the embodiment shown in FIG13 protects the display portion 11 during a drop or tumble of the display device 1000 by providing a second frame 22, thereby reducing the distance between the edge of the display portion 11 and the inner sidewall 200a of the middle frame 200. That is, the width h4 from the edge of the display portion 11 to the inner sidewall 200a of the middle frame 200 in FIG13 is smaller than the width h4' from the edge of the display portion 11 to the inner sidewall 200a of the middle frame 200 in FIG11 . This is beneficial for reducing the size of the left frame 101 of the display module 100, further achieving a narrow frame for the display device 1000.

[0189] The second frame 22 can be made of a material with a relatively low elastic modulus to provide a buffer for deformation of the middle frame 200 when the middle frame 200 is subjected to external impact, thereby preventing stress from being transmitted to the display portion 11. The elastic modulus of the second frame 22 is smaller than that of the middle frame 200, and a material such as resin can be used.

[0190] Similarly, since the second frame 22 is also provided on the right frame 103 and the upper frame 104 of the display module 100 , the sizes of the right frame 103 and the upper frame 104 of the display module 100 can also be reduced, further realizing a narrow frame of the display device 1000 .

[0191] In some embodiments, referring to FIG. 10 , a distance S2 between the second frame 22 and the inner sidewall 200 a of the middle frame 200 is 0 mm to 0.5 mm.

[0192] For example, the distance S2 between the second frame 22 and the inner sidewall 200a of the middle frame 200 may be 0, 0.1 mm, 0.12 mm, 0.2 mm, 0.26 mm, 0.3 mm, 0.36 mm, 0.4 mm, 0.46 mm, or 0.5 mm.

[0193] That is, the distance S2 between the second frame 22 and the inner sidewall 200a of the middle frame 200 can be 0. In this case, the second frame 22 and the inner sidewall 200a of the middle frame 200 are in contact, and the width h1 of the tangent line of the outer edge of the bent portion 12 in the Z direction to the inner sidewall 200a of the middle frame 200 is reduced to a minimum, greatly reducing the width of the left frame 101 of the display module 100. The distance S2 between the second frame 22 and the inner sidewall 200a of the middle frame 200 can be greater than 0. In this case, there is a gap between the second frame 22 and the inner sidewall 200a of the middle frame 200 to meet the process margin of the display module assembly and provide space for stress release for deformation of some components in the display module (such as deformation caused by thermal expansion and contraction).

[0194] It can be understood that when there is a gap between the second frame 22 and the inner wall 200a of the middle frame 200, the width of the gap is much smaller than the width of the gap between the bending portion 12 and the inner wall 200a of the middle frame 200 in the related art. Therefore, even if there is a gap between the second frame 22 and the inner wall 200a of the middle frame 200, the effect of reducing the width of the left frame 101 of the display module 100 is still achieved.

[0195] In some embodiments, please continue to refer to Figure 10. The middle frame 200 includes a first part 201 and a second part 202. The first part 201 is arranged around the display module 100, and the second part 202 is connected to the end of the first part 201 away from the cover plate 30. The second part 202 and the first part 201 are combined in an "L" shape.

[0196] The second part 202 includes a first surface 202a facing the cover plate 30, and the surface of the second frame 22 away from the cover plate 30 is in contact with the first surface 202a, so that the second part 202 of the middle frame 200 supports the second frame 22, which is beneficial to improving the stability of the second frame 22 and further improving the protection effect of the display part 11 of the display panel 10.

[0197] In some embodiments, as shown in Figure 9, the length L2 of the first frame 21 (i.e., the size of the first frame 21 in the Y direction) and the length L1 of the binding portion 13 of the display panel 10 (i.e., the size L1 of the binding portion 13 in the Y direction) are the same or approximately the same, and the length L2 of the first frame 21 is smaller than the length L3 of the lower frame 102 (i.e., the size of the lower frame 102 in the Y direction), and a portion of the second frame 22 extends to the lower frame 102 and is connected to the first frame 21.

[0198] It should be noted that “L2 and L1 are substantially the same” means that the difference between the length L2 of the first frame 21 and the length L1 of the binding portion 13 of the display panel 10 in the Y direction is very small, for example, the difference is within the range of ±5 mm.

[0199] In some embodiments, as shown in Figures 11 and 12, the length L2 of the first frame 21 is greater than the length L1 of the binding portion 13 of the display panel 10 and less than the length L3 of the lower frame 102, and a portion of the second frame 22 extends to the lower frame 102 and is connected to the first frame 21.

[0200] In some embodiments, as shown in Figure 13, the length L2 of the first frame 21 is greater than the length L1 of the binding portion 13 of the display panel 10, and is approximately the same as the length L3 of the lower frame 102. The second frame 22 is only set on the left frame 101, the right frame 103 and the upper frame 104, and is connected to the first frame 21 set on the lower frame 102.

[0201] It should be noted that "L2 and L3 are approximately the same" means that the difference between the length L2 of the first frame 21 (i.e., the size of the first frame 21 in the Y direction) and the length L3 of the lower frame 102 (i.e., the size of the lower frame 102 in the Y direction) is very small, for example, the difference is within the range of ±5 mm.

[0202] In some embodiments, as shown in FIG9 and FIG11 , the width L4 of the first frame 21 (i.e., the dimension of the first frame 21 in the X direction) and the width L5 of the second frame 22 (i.e., the dimension of the second frame 22 in a direction perpendicular to its own length) are the same or substantially the same. This allows the frame widths of the display module 100 to be relatively uniform across the entire display module 100.

[0203] In other embodiments, as shown in Figures 12 and 13, the width L4 of the first frame 21 is greater than the width L5 of the second frame 22, and the width L5 of the second frame 22 can be the same as or substantially the same as the width L6 of the first retaining wall 211 of the first frame 21 (i.e., the dimension of the first retaining wall 211 in the X direction) or the width L7 of the second retaining wall 212 (i.e., the dimension of the second retaining wall 212 in the X direction). Since the bending portion 12 and the binding portion 13 are located at the lower frame 102, by setting the width of the first frame 21 larger, the first frame 21 can better cover and protect the bending portion 12. Moreover, the width of the second frame 22 is equal to the width of the first retaining wall 211 (or the second retaining wall 212) of the first frame 21, which facilitates the preparation of the second frame 22 and the first retaining wall 211 (or the second retaining wall 212) in the same process steps. That is, the preparation of the second frame 22 is compatible with the preparation process of the first frame 21, which helps simplify the preparation process of the display module.

[0204] The structure of the second frame 22 of the display module 100 is described in detail below.

[0205] In some embodiments, as shown in FIG. 11 , FIG. 12 and FIG. 13 , the second frame 22 is a single-layer structure.

[0206] The above-mentioned “single-layer structure” means that, along a direction perpendicular to the length extension direction of the second frame 22 , the second frame 22 only includes one film layer structure.

[0207] In other embodiments, as shown in FIG10 , which is a cross-sectional view of the display device 1000 along section line II in FIG2 , the second frame 22 is a composite structure (i.e., the second frame 22 includes multiple film layers along a direction perpendicular to the length of the second frame 22 ). The second frame 22 includes a third retaining wall 221, a fourth retaining wall 222, and a second filling portion 223. The first end 221a of the third retaining wall 221 is connected to the edge of the cover plate 30, and the first end 222a of the fourth retaining wall is connected to the display unit 11. A spacing d3 is provided between the third retaining wall 221 and the fourth retaining wall 222. The second filling portion 223 is filled between the third retaining wall 221 and the fourth retaining wall 222.

[0208] It is understood that in the embodiment of the present disclosure, the third retaining wall 221 and the fourth retaining wall 222 can be formed using a printing process, and the second filling portion 223 can be formed using a printing or glue pouring process. In order to enable the second filling portion 223 to more fully cover the display portion 11 of the display panel 10 and better protect the display portion 11, the material used to form the second filling portion 223 can be made of a material with low viscosity. In this way, when the second filling portion 223 is formed by printing or glue pouring, the material of the second filling portion 223 can more easily flow toward the cover plate 30 to cover more of the display portion 11.

[0209] The third retaining wall 221 and the fourth retaining wall 222 serve as a barrier for the second filling portion 223 to prevent the material from overflowing from the second filling portion 223. Furthermore, to improve the forming efficiency of the third retaining wall 221 and the fourth retaining wall 222 after printing, the material used to form the third retaining wall 221 and the fourth retaining wall 222 can be a material with a higher viscosity. Specifically, the viscosity of the material used to form the third retaining wall 221 and the fourth retaining wall 222 is greater than the viscosity of the material used to form the second filling portion 223.

[0210] As mentioned above, the second frame 22 can be made of a material with a relatively low elastic modulus. On this basis, the material used to form the third retaining wall 221, the fourth retaining wall 222 and the second filling portion 223 can be polyimide or epoxy resin.

[0211] In some embodiments, the materials used to form the third retaining wall 221, the fourth retaining wall 222, and the second filling portion 223 are the same, but differ in viscosity, or the materials used to form the third retaining wall 221, the fourth retaining wall 222, and the second filling portion 223 contain the same components. In this way, after curing, the third retaining wall 221, the fourth retaining wall 222, and the second filling portion 223 form a single unitary structure, i.e., the second frame 22 forms a single unitary structure. It should be understood that "same materials" means that the third retaining wall 221, the fourth retaining wall 222, and the second filling portion 223 are primarily made of the same material. The third retaining wall 221, the fourth retaining wall 222, and the second filling portion 223 may contain other materials of different types, or other materials of the same type but in different proportions. For example, by adding different proportions of other materials to the same primary material, the viscosity of the second filling portion 223 can be lower, while the viscosity of the third retaining wall 221 and the fourth retaining wall 222 can be higher.

[0212] On this basis, since the viscosity of the material used to form the second filling portion 223 is relatively low, that is, the fluidity of the material used to form the second filling portion 223 is relatively high, the material used to form the second filling portion 223 arranged between the third retaining wall 221 and the fourth retaining wall 222 has a surface portion on the side away from the cover plate 30 slightly concave toward the cover plate 30 after solidification, that is, the surface of the second filling portion 223 on the side away from the cover plate 30 is uneven.

[0213] In some embodiments, as shown in FIG14 , the first retaining wall 211 is connected to the third retaining wall 221, the second retaining wall 212 is connected to the fourth retaining wall 222, and a top cover 214 is provided at an end of the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, and the fourth retaining wall 222 away from the cover plate 30. A plurality of through holes 215 are formed in the top cover 214.

[0214] The top cover 214 , the first retaining wall 211 , the second retaining wall 212 , the third retaining wall 221 and the fourth retaining wall 222 enclose a receiving space, and the first filling portion 213 and the second filling portion 223 are filled in the receiving space.

[0215] Exemplarily, the through-holes 215 include at least one pouring hole 2151 and at least one vent hole 2152, i.e., the top cover 214 is provided with both a pouring hole 2151 and a vent hole 2152. The number of pouring holes 2151 and vent holes 2152 on the top cover 214 can be the same or different. For example, the number of pouring holes 2151 and the number of vent holes 2152 on the top cover 214 can both be 1, 2, 3, etc.; alternatively, the number of pouring holes 2151 on the top cover 214 can be 1, and the number of vent holes 2152 on the top cover 214 can be 2.

[0216] Exemplarily, the material used to form the first retaining wall 211 and the material used to form the third retaining wall 221 can be the same, and the material used to form the second retaining wall 212 and the material used to form the fourth retaining wall 222 can also be the same. When the first retaining wall 211, the second retaining wall 212, the third retaining wall 221 and the fourth retaining wall 222 are formed through a printing process, the first retaining wall 211 and the third retaining wall 221 can be formed simultaneously, and the second retaining wall 212 and the fourth retaining wall 222 can also be formed simultaneously, which can simplify the operating steps and help improve the preparation efficiency of the first frame 21 and the second frame 22.

[0217] Exemplarily, the material used to form the first filling portion 213 and the material used to form the second filling portion 223 can be the same filling material, and the first filling portion 213 and the second filling portion 223 are formed simultaneously in the accommodating space enclosed by the top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221 and the fourth retaining wall 222, which can simplify the operating steps and help improve the preparation efficiency of the first frame 21 and the second frame 22.

[0218] In some embodiments, when the top cover 214 includes a support layer 2141 and a main layer 2142, when the materials used to form the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, the fourth retaining wall 222, the first filling part 213, the second filling part 223 and the main layer 2142 of the top cover 214 are the same, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, the fourth retaining wall 222, the first filling part 213, the second filling part 223 and the main layer 2142 of the top cover 214 after molding are an integrated structure, and the support layer 2141 is embedded in the integrated structure formed by the above-mentioned first retaining wall 211, the second retaining wall 212, the third retaining wall 221, the fourth retaining wall 222, the first filling part 213, the second filling part 223 and the main layer 2142 of the top cover 214.

[0219] For example, as shown in FIG14 , the width L9 of the position where the through hole 215 is located on the second frame 22 can be greater than the width L8 of the position where the through hole 215 is not set on the second frame 22. On the one hand, it ensures that the through hole 215 has a sufficient size for glue filling or vacuuming. On the other hand, it can ensure that the width of the portion of the second frame 22 where the through hole 215 is not set is smaller, thereby ensuring the realization of a narrow frame of the display device 1000.

[0220] It is understood that when the top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, and the fourth retaining wall 222 enclose a receiving space, the through hole 215 can also be provided in the portion of the top cover 214 corresponding to the first frame 21. When the through hole 215 is provided in the portion of the top cover 214 corresponding to the first frame 21, the width of the portion of the first frame 21 where the through hole 215 is located can be greater than the width of the portion of the first frame 21 where the through hole 215 is not provided. This ensures that the through hole 215 is of sufficient size to facilitate glue injection or vacuuming, and also ensures that the width of the portion of the first frame 21 where the through hole 215 is not provided is relatively small, thereby ensuring that the display device 1000 has a narrow frame.

[0221] Considering that if the first filling portion 213 and / or the second filling portion 223 are formed by one-time glue pouring, the glue material may not be able to fully fill the accommodation space enclosed by the top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, and the fourth retaining wall 222 due to the excessively long flow path of the glue material, in some embodiments, as shown in FIG15 , the display module 100 further includes at least one fifth retaining wall 231. The fifth retaining wall 231 is disposed within the accommodation space enclosed by the top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, and the fourth retaining wall 222, thereby dividing the accommodation space into a plurality of sub-accommodation spaces. By providing the fifth retaining wall 231 to divide the accommodation space into a plurality of sub-accommodation spaces, the first filling portion 213 and / or the second filling portion 223 can be formed in each sub-accommodation space, thereby shortening the flow path of the glue material during the glue pouring, promoting the glue material to fully fill each sub-accommodation space, and facilitating improving the yield of the first frame 21 and the second frame 22.

[0222] The fifth retaining wall 231 may be made of the same material as the first retaining wall 211 , the second retaining wall 212 , the third retaining wall 221 or the fourth retaining wall 222 , so that they can be formed simultaneously, which is beneficial to simplifying the process steps and reducing the process difficulty.

[0223] When the top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221 and the fourth retaining wall 222 enclose a storage space divided into multiple sub-storage spaces, the top cover 214 can be provided with multiple through holes 215 in the area corresponding to each sub-storage space, and the through holes 215 corresponding to each sub-storage space include at least one pouring hole 2151 and at least one exhaust hole 2152.

[0224] The above-mentioned “each sub-accommodating space corresponding to the through hole 215 includes at least one pouring hole 2151 and at least one exhaust hole 2152” means that each sub-accommodating space corresponding to the through hole 215 may include one pouring hole 2151 and one exhaust hole 2152, and each sub-accommodating space corresponding to the through hole 215 may also include multiple pouring holes 2151 and multiple exhaust holes 2152, and the number of corresponding pouring holes 2151 and exhaust holes 2152 in the through hole 215 corresponding to each sub-accommodating space may be the same or different.

[0225] The following is a detailed description of the method for manufacturing the display module 100 .

[0226] As shown in Figures 16, 17, 18, and 20, Figure 16 is a flow chart of a method for manufacturing a display module 100 in some embodiments of the present disclosure, and Figures 17, 18, and 20 are structural diagrams corresponding to each step in the method for manufacturing the display module 100 provided in accordance with Figure 16. The method for manufacturing the display module 100 includes the following steps:

[0227] R1: As shown in FIG17 , a display panel 10 is provided. The display panel 10 includes a display portion 11, a bending portion 12, and a binding portion 13 connected in sequence. The bending portion 12 is bent so that the binding portion 13 is located on the non-display side 11 b of the display portion 11 .

[0228] R2: As shown in FIG18 , a cover plate 30 is stacked on the display side 11a of the display portion 11, and a boundary of the cover plate 30 is farther away from the display portion 11 than a boundary of the bending portion 12 farthest from the display portion 11, that is, the orthographic projection of the boundary of the bending portion 12 farthest from the display portion 11 on the cover plate 30 falls inside the cover plate 30 and has a distance d1 between it and the boundary of the cover plate 30.

[0229] R3: As shown in FIG. 20 , a first frame 21 is formed on a side of the cover plate 30 close to the display panel 10 , and the first frame 21 extends along a side of the cover plate 30 corresponding to the binding portion 13 .

[0230] The steps of forming the first frame 21 are described in detail below.

[0231] As shown in Figures 19 and 20, Figure 19 is a flow chart of the steps of forming the first frame 21 according to some embodiments of the present disclosure, and Figure 20 is a structural diagram corresponding to each step in the steps of forming the first frame 21 provided in Figure 19. The steps of forming the first frame 21 include:

[0232] R31: forming a first retaining wall 211 at the edge area of ​​the cover plate 30 by a printing process;

[0233] R32: A second retaining wall 212 is formed on the side of the binding portion 13 away from the cover plate 30 by a printing process, with a distance d2 between the second retaining wall 212 and the first retaining wall 211;

[0234] R33: Form a first filling portion 213 between the first retaining wall 211 and the second retaining wall 212 through a printing process or a glue filling process.

[0235] The viscosity of the material used to form the first retaining wall 211 and the second retaining wall 212 is greater than the viscosity of the material used to form the first filling portion 213. In order to enable the first filling portion 213 to more fully cover the bent portion 12 and better protect the bent portion 12, the material used to form the first filling portion 213 can be a material with good fluidity, that is, a material with low viscosity. In this way, when the first filling portion 213 is formed by printing or glue pouring, the material of the first filling portion 213 can more easily flow toward the cover plate 30 to cover more of the bent portion 12.

[0236] The first retaining wall 211 and the second retaining wall 212 can serve as a blocking structure for the first filling portion 213 to prevent the material of the first filling portion 213 from overflowing. In addition, in order to improve the forming rate of the printed first retaining wall 211 and the second retaining wall 212, the material used to form the first retaining wall 211 and the second retaining wall 212 can be a material with a higher viscosity.

[0237] The above-mentioned method for forming the first frame 21 is: first, a first retaining wall 211 and a second retaining wall 212 are formed respectively by a printing process, and then a first filling portion 213 is formed between the first retaining wall 211 and the second retaining wall 212 by a printing process or a glue pouring process. Compared with forming the first frame 21 by an injection molding process, no mold is required in the process of forming the first frame 21. On the one hand, it can avoid problems such as defects of the first frame 21 during the demolding process. On the other hand, because different models of display modules 100 use different molds when forming the first frame 21 by an injection molding process, corresponding molds need to be made separately. Therefore, the method for forming the first frame 21 in the embodiment of the present disclosure can reduce the production cost of the first frame 21 and further reduce the production cost of the display module 100.

[0238] For example, the material used to form the first retaining wall 211 , the second retaining wall 212 and the first filling portion 213 may be polyimide or epoxy resin.

[0239] Exemplarily, the above-mentioned printing process may be a 3D printing process.

[0240] For example, when the first filling portion 213 is formed between the first retaining wall 211 and the second retaining wall 212 by a printing process or a glue pouring process, after the material used to form the first filling portion 213 enters between the first retaining wall 211 and the second retaining wall 212, the molding of the first filling portion 213 can be accelerated by ultraviolet curing.

[0241] In some embodiments, as shown in Figure 5, since the viscosity of the material used to form the first filling portion 213 is relatively low, that is, the fluidity of the material used to form the first filling portion 213 is relatively high, the material used to form the first filling portion 213 arranged between the first retaining wall 211 and the second retaining wall 212 has its first surface 213a (that is, the side surface of the first filling portion 213 away from the cover plate 30) slightly concave toward the cover plate 30 after solidification, that is, the side surface of the first filling portion 213 away from the cover plate 30 is uneven.

[0242] As shown in Figure 20, in the above step R33: when the first filling portion 213 is formed between the first retaining wall 211 and the second retaining wall 212 through a printing process or a glue filling process, since the gap between the cover plate 30 and the bending portion 12 (that is, the area f11 circled by the dotted box in Figure 20) is small, the material used to form the first filling portion 213 may have difficulty in entering the area f11 between the cover plate 30 and the bending portion 12.

[0243] Based on this, in some embodiments, as shown in Figures 21 and 22, Figure 21 is a flow chart of step R33 of forming the first frame 21 according to some embodiments of the present disclosure, and Figure 22 is a structural diagram corresponding to each step in step R33 of forming the first frame 21 provided in Figure 21. In the above steps of forming the first frame 21, after step R32, step R33 specifically includes the following steps:

[0244] R331: A top cover 214 is formed at the second end 211b of the first retaining wall 211 (i.e., the end of the first retaining wall 211 away from the cover plate 30) and the second end 212b of the second retaining wall 212 (i.e., the end of the second retaining wall 212 away from the cover plate 30), so that the top cover 214, the first retaining wall 211 and the second retaining wall 212 enclose a receiving space f1.

[0245] The top cover 214 is provided with a plurality of through holes 215 , and the plurality of through holes 215 include at least one pouring hole 2151 and at least one exhaust hole 2152 ;

[0246] R332: The material (glue) used to form the first filling part 213 is injected into the accommodating space f1 through the pouring hole 2151 through the glue pouring process, and the accommodating space f1 is vacuumed through the exhaust hole 2152, so that the material (glue) used to form the first filling part 213 fills the accommodating space f1 to form the first filling part 213.

[0247] After the material for forming the first filling portion 213 enters the accommodating space f1 through the pouring hole 2151, the accommodating space f1 is vacuumed through the exhaust hole 2152, which is conducive to the material for forming the first filling portion 213 flowing toward the side close to the cover plate 30 and flowing to between the cover plate 30 and the bending portion 12, that is, the area f11 surrounded by the dotted box in Figure 22, which can increase the contact area between the first filling portion 213 and the bending portion 12, which is conducive to further protecting the bending portion 12 of the display panel 10 and improving the extrusion strength of the bending portion 12 of the display panel 10.

[0248] Exemplarily, as shown in Figure 23, the steps of forming the above-mentioned top cover 214 include: forming a support layer 2141 at the second end 211b of the first retaining wall 211 (that is, the end of the first retaining wall 211 away from the cover plate 30) and the second end 212b of the second retaining wall 212 (that is, the end of the second retaining wall 212 away from the cover plate 30), and forming a main body layer 2142 on the side of the support layer 2141 away from the cover plate 30 through a printing process.

[0249] The support layer 2141 can play a supporting role when the main body layer 2142 is formed through a printing process. On the one hand, it is conducive to the molding of the main body layer 2142, and on the other hand, it can also make the molded main body layer 2142 have a flat surface.

[0250] For example, when forming the top cover 214 through the above steps, a core hole having the same diameter as the pouring hole 2151 and the vent hole 2152 can be reserved before forming the support layer 2141 and the main body layer 2142. After the top cover 214 is formed, the core hole can be pulled out to form the pouring hole 2151 and the vent hole 2152. The core hole can be made of metal, such as aluminum.

[0251] Exemplarily, as shown in Figure 23, when the first retaining wall 211 and the second retaining wall 212 are formed by a printing process, grooves 216 are formed at the ends of the first retaining wall 211 and the second retaining wall 212 away from the cover plate 30, that is, the second end 211b of the first retaining wall 211 and the second end 212b of the second retaining wall 212. On the one hand, the grooves 216 can be used to place the support layer 2141 when forming the support layer 2141, and on the other hand, can also play a blocking role to prevent the material used to form the main layer 2142 from overflowing when the main layer 2142 is formed by a printing process.

[0252] Exemplarily, the material of the support layer 2141 may be a metal mesh.

[0253] For example, the material used to form the main body layer 2142 may be a resin, such as a photosensitive resin.

[0254] In some embodiments, please continue to refer to Figures 21 and 22. The above step R33 also includes R333: part of the material in the accommodating space f1 for forming the first filling portion 213 enters the cavity of the bending portion 12 facing the display portion 11 to form a third filling portion 219.

[0255] It is understood that when the third filling portion 219 is formed through the above step R333, the material used to form the third filling portion 219 is the same as the material used to form the first filling portion 213. Step R333 and step R332 are performed simultaneously.

[0256] In other embodiments, as shown in FIG. 24 , FIG. 25 and FIG. 26 , FIG. 24 is a flow chart of step R33 of forming the first frame 21 according to some embodiments of the present disclosure, and FIG. 25 and FIG. 26 are structural diagrams corresponding to the steps in step R33 of forming the first frame 21 provided in FIG. 24 . In the above steps of forming the first frame 21, after step R32, step R33 specifically includes the following steps:

[0257] R331′: As shown in FIG. 25 or FIG. 26 , a material (ie, glue) containing conductive particles 218 or magnetic particles 217 for forming the first filling portion 213 is disposed between the first retaining wall 211 and the second retaining wall 212 .

[0258] R332': As shown in FIG25 , an electric field force or a magnetic field force is applied to the accommodation space f1 within the display module 100 on the side of the cover plate 30 away from the display panel 10. That is, when the material used to form the first filling portion 213 includes conductive particles 218, an electric field force is applied to the accommodation space f1 within the display module 100 on the side of the cover plate 30 away from the display panel 10. When the material used to form the first filling portion 213 includes magnetic particles 217, a magnetic field force is applied to the accommodation space f1 within the display module 100 on the side of the cover plate 30 away from the display panel 10. The material (i.e., glue) containing conductive particles 218 or magnetic particles 217 used to form the first filling portion 213 is made to flow toward the side close to the cover plate 30 (i.e., the direction of the black arrow in Figure 25) and flow to between the cover plate 30 and the bending portion 12, i.e., the area f11 framed by the dotted line in Figure 25. This can increase the contact area between the first filling portion 213 and the bending portion 12, which is beneficial to further protect the bending portion 12 of the display panel 10 and improve the compressive strength of the bending portion 12 of the display panel 10.

[0259] Alternatively, as shown in Figure 26, when the material used to form the first filling portion 213 contains magnetic particles 217, the ink layer 90 in the edge area of ​​the cover plate 30 close to the display panel 10 can be set as a magnetic ink layer; the material (i.e., glue) containing magnetic particles 217 for forming the first filling portion 213 is made to flow in the direction close to the magnetic ink layer, and flows to between the cover plate 30 and the bending portion 12, i.e., the area f11 surrounded by the dotted box in Figure 26, so that the formed first filling portion 213 contacts the ink layer 90, and part of the first filling portion 213 extends between the bending portion 12 and the ink layer 90, which can increase the contact area between the first filling portion 213 and the bending portion 12, which is beneficial to further protect the bending portion 12 of the display panel 10 and improve the compressive strength of the bending portion 12 of the display panel 10.

[0260] In some embodiments, step R1 of the method for manufacturing the display module 100 further includes forming a third filling portion 219. As shown in Figures 27 and 28, Figure 27 is a flow chart of step R1 of the method for manufacturing the display module 100 in some embodiments of the present disclosure, and Figure 28 is a structural diagram corresponding to each step in step R1 of the method for manufacturing the display module 100 provided according to Figure 27. The above-mentioned step R1 includes:

[0261] R11: Provide a display panel 10 , which includes a display portion 11 , a bending portion 12 , and a binding portion 13 connected in sequence, and form a third filling portion 219 on a side of the bending portion 12 away from the cover plate 30 .

[0262] R12 : Bend the bent portion 12 so that the binding portion 13 is located on the non-display side 11 b of the display portion 11 .

[0263] It can be understood that the third filling portion 219 formed by the above step R1 is formed before the first filling portion 213, that is, the third filling portion 219 and the first filling portion 213 are not formed synchronously. Therefore, the material used to form the third filling portion 219 and the material used to form the first filling portion 213 can be different or the same.

[0264] For example, the material used to form the third filling portion 219 may be polyimide or epoxy resin.

[0265] Exemplarily, the third filling portion 219 may be formed by a glue potting process.

[0266] In some embodiments, the method for preparing the display module 100 further includes step R4: forming a second frame 22 on a side of the cover plate 30 close to the display panel 10, wherein the second frame 22 and the first frame 21 are connected to form a frame surrounding the display panel 10. The steps for forming the second frame 22 are described in detail below.

[0267] In some embodiments, the second frame 22 is a single-layer structure. The second frame 22 can be formed separately before or after the first frame 21 is formed. As shown in Figures 29 to 33B, Figure 29 is a flow chart of a method for preparing the display module 100 in some embodiments of the present disclosure, and Figures 30 to 32 are structural diagrams corresponding to the method for preparing the display module 100 provided according to Figure 29. Figure 33A is a cross-sectional view of Figure 31 or Figure 32 along the HH section line, and Figure 33B is a cross-sectional view of Figure 31 or Figure 32 along the GG section line. The cross-sectional structure of the first frame 21 and the second frame 22 formed can be seen from Figure 33A, and the cross-sectional structure of the second frame 22 formed can be seen from Figure 33B. Among them, the difference between Figures 30 to 32 is that the shapes of the first frame 21 and the second frame 22 are different. Please refer to the description of Figures 11 to 13 for details, which will not be repeated here.

[0268] It should be noted that FIG. 29 to FIG. 33B illustrate an example in which the second frame 22 is formed separately after the first frame 21 is formed. However, the order of forming the first frame 21 and the second frame 22 in the present disclosure is not limited to this.

[0269] For example, a printing process, such as a 3D printing process, can be used to form the second frame 22 on the side of the cover plate 30 close to the display panel 10. The second frame 22 is formed by a printing process. Compared with the injection molding process to form the second frame 22, no mold is required in the process of forming the second frame 22. On the one hand, it can avoid the second frame 22 being prone to defects during the demolding process. On the other hand, since different models of display modules 100 use different molds when forming the second frame 22 by the injection molding process, corresponding molds need to be made separately. Therefore, the method of forming the second frame 22 by a printing process can reduce the production cost of the second frame 22 and further reduce the production cost of the display module 100.

[0270] Exemplarily, the viscosity of the material used to form the second frame 22 is greater than the viscosity of the material used to form the first filling portion 213 , and the second frame 22 is easily formed when formed by a printing process, which is beneficial to improving the forming rate of the second frame 22 .

[0271] For example, the material used to form the second frame 22 may be polyimide or epoxy resin.

[0272] For example, the material used to form the second frame 22 may be the same material as or different from the material used to form the first retaining wall 211 or the material used to form the second retaining wall 212 .

[0273] In some embodiments, when the second frame 22 is a single-layer structure, the second frame 22 can also be formed simultaneously with the first retaining wall 211 of the first frame 21, or with the second retaining wall 212 of the first frame 21. Figures 34, 35, and 36 illustrate the synchronous formation of the second frame 22 and the first retaining wall 211 as an example. As shown in Figures 34, 35, and 36, Figure 34 is a flow chart of step R3 of synchronously forming the first retaining wall 211 and the second frame 22 in some embodiments of the present disclosure, and Figures 35 and 36 are structural diagrams corresponding to step R3 of synchronously forming the first retaining wall 211 and the second frame 22 provided in Figure 34. It should be noted that the dotted line along the X direction in Figures 35 and 36 refers to the boundary line between the first retaining wall 211 and the second frame 22. The difference between Figures 30 and 32 lies in the different shapes of the first retaining wall 211 and the second frame 22. Please refer to the description of Figures 12 and 13 for details, which will not be repeated here.

[0274] R31 ′: forming a first retaining wall 211 and a second frame 22 at the edge area of ​​the cover plate 30 by a printing process.

[0275] The first retaining wall 211 and the second frame 22 are formed simultaneously through a printing process, which can simplify the process steps and is conducive to improving the preparation efficiency of the first frame 21 and the second frame 22.

[0276] It can be understood that since the first retaining wall 211 and the second frame 22 are formed simultaneously, the material used to form the first retaining wall 211 is the same as the material used to form the second frame 22, and the first retaining wall 211 and the second frame 22 are an integral structure with no obvious boundary between the two.

[0277] In other embodiments, the second frame 22 is a composite structure. The second frame 22 can be formed separately before or after the first frame 21 is formed, or it can be formed synchronously with the first frame 21. The following description takes the synchronous formation of the second frame 22 and the first frame 21 as an example, but the order of forming the first frame 21 and forming the second frame 22 in the present disclosure is not limited to this. As shown in Figures 37 to 40, Figure 37 is a flow chart of step R3A of synchronously forming the first frame 21 and the second frame 22 in the method for preparing the display module 100 in some embodiments of the present disclosure, and Figures 38 to 40 are structural diagrams corresponding to each step in step R3A of synchronously forming the first frame 21 and the second frame 22 in the method for preparing the display module 100 provided according to Figure 37.

[0278] It should be noted that the dotted line extending along the X direction in Figure 38 refers to the dividing line between the first retaining wall 211 and the third retaining wall 221, the dotted line extending along the X direction in Figure 39 refers to the dividing line between the first retaining wall 211 and the third retaining wall 221, and the dividing line between the second retaining wall 212 and the fourth retaining wall 222, and the dotted line extending along the X direction in Figure 40 refers to the dividing line between the first frame 21 and the second frame 22.

[0279] Step R3A of synchronously forming the first frame 21 and the second frame 22 includes:

[0280] R31A: As shown in FIG38 , a first retaining wall 211 and a third retaining wall 221 are formed on the edge area of ​​the cover plate 30 by a printing process. The first retaining wall 211 and the third retaining wall 221 form a frame shape.

[0281] R32A: As shown in FIG39 , a second retaining wall 212 and a fourth retaining wall 222 are formed on a side of the display panel 10 away from the cover plate 30 by a printing process. The second retaining wall 212 and the fourth retaining wall 222 form a frame shape.

[0282] R33A: As shown in FIG40 , a first filling portion 213 is formed between the first retaining wall 211 and the second retaining wall 212 by a printing process or a glue filling process, and a second filling portion 223 is formed between the third retaining wall 221 and the fourth retaining wall 222 .

[0283] It can be understood that since the first retaining wall 211 and the third retaining wall 221 are formed simultaneously, the second retaining wall 212 and the fourth retaining wall 222 are formed simultaneously, and the first filling section 213 and the second filling section 223 are formed simultaneously, the material used to form the first retaining wall 211 and the material used to form the third retaining wall 221 can be the same, the material used to form the second retaining wall 212 and the material used to form the fourth retaining wall 222 can be the same, the material used to form the first filling section 213 and the material used to form the second filling section 223 can also be the same, and the first retaining wall 211 and the third retaining wall 221, the second retaining wall 212 and the fourth retaining wall 222, the first filling section 213 and the second filling section 223 can all be an integral structure, that is, there is no obvious boundary between the two integral structures mentioned above.

[0284] Through the above steps S31A to S33A, the first frame 21 and the second frame 22 are formed synchronously, thereby simplifying the process steps and improving the preparation efficiency of the first frame 21 and the second frame 22 .

[0285] In some embodiments, after step R32A, step R33A includes steps R331A and R332A. As shown in Figures 41, 42, and 43, Figure 41 is a flow chart of step R33A of synchronously forming the first frame 21 and the second frame 22 in the method for manufacturing the display module 100 in some embodiments of the present disclosure, and Figures 42 and 43 are structural diagrams corresponding to the respective steps in step R33A of synchronously forming the first frame 21 and the second frame 22 in the method for manufacturing the display module 100 provided according to Figure 41.

[0286] It should be noted that the dotted line extending along the X direction in FIG. 42 and FIG. 43 refers to the boundary line between the first frame 21 and the second frame 22 .

[0287] R331A: As shown in Figure 42, a top cover 214 is provided at one end of the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, and the fourth retaining wall 222, away from the cover plate 30. The top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221, and the fourth retaining wall 222 together form a receiving space. A plurality of through holes 215 are defined in the top cover 214. The through holes 215 include at least one pouring hole 2151 and at least one vent hole 2152. In other words, the top cover 214 is provided with both pouring holes 2151 and vent holes 2152.

[0288] R332A: As shown in FIG43 , the material for forming the first filling portion 213 and the second filling portion 223 is injected into the accommodation space through the pouring hole 2151 and the accommodation space is evacuated through the exhaust hole 2152 so that the material for forming the first filling portion 213 and the second filling portion 223 fills the accommodation space and forms the first filling portion 213 and the second filling portion 223.

[0289] It should be noted that the structure and preparation method of the top cover 214 in this embodiment are basically the same as the structure and preparation method of the aforementioned top cover 214, and will not be repeated here.

[0290] In some embodiments, as shown in Figure 44, the preparation method of the display module 100 also includes: forming a fifth retaining wall 231 through a printing process, the fifth retaining wall 231 is printed on the top cover 214, the first retaining wall 211, the second retaining wall 212, the third retaining wall 221 and the fourth retaining wall 222 to form a receiving space, and the receiving space is divided into a plurality of sub-receiving spaces. A first filling portion 213 and / or a second filling portion 223 can be formed in each sub-receiving space, thereby shortening the flow path of the glue material, promoting the glue material to fully fill each sub-receiving space, and facilitating improving the yield of the first frame 21 and the second frame 22.

[0291] For example, the fifth retaining wall 231 may be formed simultaneously with the first retaining wall 211 , the second retaining wall 212 , the third retaining wall 221 or the fourth retaining wall 222 , which is beneficial to simplifying the manufacturing process and improving the manufacturing efficiency.

[0292] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display module, comprising: The display panel comprises a display portion, a bending portion and a binding portion connected in sequence, wherein the bending portion is bent so that the binding portion is located on a non-display side of the display portion; A cover plate, stacked on a display side of the display portion, wherein a boundary of the cover plate is farther from the display portion than a boundary of the bent portion that is farthest from the display portion; A first frame is provided on a side of the cover plate close to the display panel and extends along a side of the cover plate corresponding to the binding portion; The first frame includes: a first retaining wall and a second retaining wall, wherein one end of the first retaining wall is connected to the edge area of ​​the cover plate, one end of the second retaining wall is connected to the binding portion, and there is a distance between the first retaining wall and the second retaining wall; A first filling portion, filled between the first retaining wall and the second retaining wall; The viscosity of the material used to form the first retaining wall and the second retaining wall is greater than the viscosity of the material used to form the first filling part.

2. The display module according to claim 1, wherein: The display module further includes a top cover, and the top cover is connected to one end of the first retaining wall and the second retaining wall away from the cover plate; The top cover, the first retaining wall and the second retaining wall enclose a receiving space, and the first filling part fills the receiving space; The top cover is provided with a plurality of through holes.

3. The display module according to claim 2, wherein: The top cover includes a support layer and a main body layer which are stacked, and the support layer is closer to the cover plate than the main body layer.

4. The display module according to claim 3, wherein: The support layer includes a metal wire mesh, and the edge of the main layer is connected to the first retaining wall and the second retaining wall through the mesh holes of the metal wire mesh.

5. The display module according to claim 3 or 4, wherein: The material of the main body layer is the same as that of the first retaining wall.

6. The display module according to any one of claims 2 to 5, wherein: The width of the portion of the top cover where the through hole is provided is greater than the width of the portion where the through hole is not provided.

7. The display module according to any one of claims 2 to 6, wherein: A groove is provided at one end of the first retaining wall and the second retaining wall away from the cover plate, and the edge of the top cover is placed in the groove of the first retaining wall and the second retaining wall.

8. The display module according to claim 1, wherein: Magnetic particles or conductive particles are arranged in the first filling portion.

9. The display module according to claim 8, wherein: The magnetic particles include at least one of magnetic nanoparticles and magnetic polymer particles; The conductive particles include at least one of organic conductive particles and carbon conductive particles.

10. The display module according to claim 8 or 9, wherein: The display module further includes an ink layer, which is disposed on a side of the cover plate close to the display panel and located in an edge area of ​​the cover plate; The first filling portion is in contact with the ink layer, and a portion of the first filling portion extends between the bending portion and the ink layer.

11. The display module according to claim 10, wherein: The ink layer has magnetic properties.

12. The display module according to any one of claims 8 to 11, wherein: The bending portion is bent to form a cavity facing the display portion. The display module further includes a third filling portion filled in the cavity formed by the bending portion. The material of the third filling portion is different from that of the first filling portion.

13. The display module according to any one of claims 1 to 12, wherein: The display module further includes a second frame, wherein the first frame and the second frame are connected to form a frame shape surrounding the display panel; The width of the second frame is substantially equal to the width of the first retaining wall or the second retaining wall, and the viscosity of the material used to form the second frame is greater than the viscosity of the material used to form the first filling portion.

14. The display module according to claim 13, wherein: The width of the first frame is greater than the width of the second frame.

15. The display module according to any one of claims 1 to 12, wherein: The display module further includes a second frame, wherein the first frame and the second frame are connected to form a frame shape surrounding the display panel; The second frame includes: a third retaining wall and a fourth retaining wall, wherein one end of the third retaining wall is connected to the edge area of ​​the cover plate, one end of the fourth retaining wall is connected to the display portion, and there is a distance between the third retaining wall and the fourth retaining wall; A second filling portion, filled between the third retaining wall and the fourth retaining wall; The viscosity of the material used to form the third retaining wall and the fourth retaining wall is greater than the viscosity of the material used to form the second filling part.

16. The display module according to claim 15, wherein: The display module includes a top cover, and the top cover is connected to the first retaining wall, the second retaining wall, the third retaining wall and one end of the fourth retaining wall away from the cover plate; The top cover, the first retaining wall, the second retaining wall, the third retaining wall and the fourth retaining wall enclose a receiving space, and the first filling part and the second filling part are filled in the receiving space; The top cover is provided with a plurality of through holes.

17. The display module according to claim 16, wherein: The display module further includes at least one fifth retaining wall, which is disposed in the accommodation space and divides the accommodation space into a plurality of sub-accommodation spaces; The top cover is provided with a plurality of through holes in an area corresponding to each of the sub-accommodating spaces.

18. The display module according to any one of claims 1, 8 to 15, wherein: The first retaining wall, the second retaining wall and the first filling portion form an integrated structure, and a surface of the first filling portion away from the cover plate is recessed toward a direction approaching the cover plate.

19. The display module according to any one of claims 3 to 5, wherein: The first retaining wall, the second retaining wall, the first filling portion and the main body layer of the top cover form an integrated structure, and the supporting layer of the top cover is embedded in the integrated structure.

20. A method for preparing a display module, comprising: A display panel is provided, wherein the display panel comprises a display portion, a bending portion and a binding portion connected in sequence, and the bending portion is bent so that the binding portion is located on a non-display side of the display portion; A cover plate is stacked on the display side of the display portion, wherein a boundary of the cover plate is farther from the display portion than a boundary of the bent portion that is farthest from the display portion; A first frame is formed on a side of the cover plate close to the display panel, and the first frame extends along a side of the cover plate corresponding to the binding portion; The forming of the first frame comprises: Forming a first retaining wall in the edge area of ​​the cover plate by a printing process; Forming a second retaining wall on a side of the binding portion away from the cover plate by a printing process, wherein a distance exists between the second retaining wall and the first retaining wall; Forming a first filling portion between the first retaining wall and the second retaining wall by a printing process or a glue pouring process; The viscosity of the material used to form the first retaining wall and the second retaining wall is greater than the viscosity of the material used to form the first filling part.

21. The method for preparing a display module according to claim 20, further comprising: A top cover is formed, and the top cover is connected to one end of the first retaining wall and the second retaining wall away from the cover plate, so that the top cover, the first retaining wall and the second retaining wall enclose a receiving space; a plurality of through holes are opened on the top cover, and the plurality of through holes include at least one pouring hole and at least one exhaust hole; The glue material is injected into the accommodation space through the pouring hole by a glue pouring process, and the accommodation space is evacuated through the exhaust hole, so that the glue material fills the accommodation space to form a first filling portion.

22. The method for preparing a display module according to claim 21, wherein: The forming of the top cover comprises: forming a support layer at one end of the first retaining wall and the second retaining wall away from the cover plate; A main body layer is formed on a side of the support layer away from the cover plate by a printing process.

23. The method for preparing a display module according to claim 20, wherein: The forming of the first filling portion comprises: Disposing a glue material containing conductive particles or magnetic particles between the first retaining wall and the second retaining wall; An electric field force or a magnetic field force is applied to the display module to make the glue material containing the conductive particles or the magnetic particles flow toward the side close to the cover plate and flow between the cover plate and the bending portion.

24. The method for preparing a display module according to claim 20, wherein: The forming of the first filling portion comprises: forming a magnetic ink layer in an edge region of the cover plate on a side close to the display panel; The adhesive material containing magnetic particles is arranged between the first retaining wall and the second retaining wall. The magnetic particles in the adhesive material containing magnetic particles flow toward the magnetic ink layer under the magnetic field force of the magnetic ink layer and flow between the cover plate and the bending portion.

25. The method for preparing a display module according to any one of claims 20 to 24, further comprising: A second frame is formed on a side of the cover plate close to the display panel, wherein the second frame is connected to the first frame to form a frame shape surrounding the display panel; Wherein, the second frame and the first retaining wall are formed synchronously, or the second frame and the second retaining wall are formed synchronously.

26. The method for preparing a display module according to any one of claims 20 to 24, further comprising: A second frame is formed on a side of the cover plate close to the display panel, wherein the second frame is connected to the first frame to form a frame shape surrounding the display panel; The forming of the second frame comprises: Forming a third retaining wall at the edge area of ​​the cover plate by a printing process, wherein the third retaining wall and the first retaining wall are formed synchronously; Forming a fourth retaining wall on a side of the display portion away from the cover plate by a printing process, wherein the fourth retaining wall and the second retaining wall are formed simultaneously, and there is a gap between the fourth retaining wall and the third retaining wall; A second filling portion is formed between the third retaining wall and the fourth retaining wall by a printing process or a glue pouring process.

27. The method for preparing a display module according to any one of claims 20 to 26, before bending the bent portion so that the binding portion is located on the non-display side of the display portion, further comprising: A third filling portion is formed on one side of the bent portion.

28. A display device comprising: The display module according to any one of claims 1 to 19; A middle frame, arranged around the display module; Wherein, the distance between the first frame of the display module and the side wall of the middle frame close to the display module is 0-0.5 mm.

29. The display device according to claim 28, wherein: The middle frame includes a first part and a second part, the first part is arranged around the display module, the second part is connected to an end of the first part away from the cover plate, and the second part includes a first surface facing the cover plate; A surface of the first frame away from the cover plate contacts the first surface.

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