Display module, preparation method of display module and display device

Abstract

The embodiment of the invention provides a display module, a preparation method of the display module and a display device, and relates to the technical field of display. The display module comprises a display panel, a cover plate and a first frame. The cover plate is arranged on the display side of the display part in a stacked mode. The first frame is arranged on the side, close to the display panel, of the cover plate and extends along the side edge, corresponding to the binding part, of the cover plate. The first frame comprises a first retaining wall, a second retaining wall and a first filling part. One end of the first retaining wall is connected with the edge area of the cover plate, one end of the second retaining wall is connected with the binding part, and a gap is formed between the first retaining wall and the second retaining wall. And the first filling part is filled between the first retaining wall and the second retaining wall. Wherein the viscosity of a material for forming the first retaining wall and the second retaining wall is greater than that of a material for forming the first filling part. The display module is used for displaying images.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module, a method for preparing the display module, and a display device. Background Art

[0002] With the continuous development of display technology, display devices have gradually become prevalent in people's lives. Among them, organic light-emitting diode (OLED) display panels are widely used in smart products such as mobile phones, TVs, and laptops due to their advantages such as self-luminescence, low power consumption, wide viewing angle, fast response speed, and high contrast. Narrow frame is an important development direction of display devices at present. Summary of the invention

[0003] The purpose of the embodiments of the present disclosure is to provide a display module, a method for manufacturing the display module, and a display device, so as to realize a narrow frame of the display device.

[0004] To achieve the above objectives, the embodiments of the present disclosure provide the following technical solutions:

[0005] On the one hand, 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 bending portion and a binding portion connected in sequence, and the bending 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, and the boundary of the cover plate is farther away from the display portion than the boundary of the bending portion farthest from the display portion. The first frame is arranged on the side of the cover plate close 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, one end of the second retaining wall is connected to the binding portion, and there is a gap 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 the above-mentioned display module, by setting a first frame, the first frame can protect the bent portion during the process of the display device falling or rolling. Compared with the related art of maintaining a certain gap between the middle frame and the bent portion to avoid the middle frame from deforming and squeezing the bent portion during the process of the display device falling or rolling, the distance between the outer edge of the bent portion and the inner side wall of the middle frame can be reduced, which is beneficial to reducing the size of the lower frame of the display module and further realizing a narrow frame of the display device.

[0008] In some embodiments, the display module further comprises a top cover. 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 together form a receiving space, and the first filling part fills the receiving space. A plurality of through holes are formed on the top cover.

[0009] In some embodiments, the top cover includes a support layer and a main body layer which are stacked together, and the support layer is closer to the cover plate than the main body layer.

[0010] In some embodiments, 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.

[0011] In some embodiments, the material of the main body layer is the same as that of the first retaining wall.

[0012] 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.

[0013] In some embodiments, 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.

[0014] In some embodiments, magnetic particles or conductive particles are disposed in the first filling portion.

[0015] In some embodiments, 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.

[0016] 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 at an edge region 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.

[0017] In some embodiments, the ink layer is magnetic.

[0018] In some embodiments, the bending portion is bent to form a cavity facing the display portion, and the display module further comprises 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.

[0019] In some embodiments, the display module further includes a second frame, 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.

[0020] In some embodiments, a width of the first border is greater than a width of the second border.

[0021] In some embodiments, the display module further includes a second frame, and the first frame is connected to the second frame to form a frame shape 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, one end of the fourth retaining wall is connected to the display portion, and there is 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.

[0022] In some embodiments, the display module includes a top cover. The top cover is connected to the first retaining wall, the second retaining wall, the third retaining wall, and the fourth retaining wall at one end 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. A plurality of through holes are provided on the top cover.

[0023] In some embodiments, the display module further comprises at least one fifth retaining wall, which is disposed in 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.

[0024] 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 a direction approaching the cover plate.

[0025] In some embodiments, the first retaining wall, the second retaining wall, the first filling portion, and a main layer of the top cover form an integrated structure, and a supporting layer of the top cover is embedded in the integrated structure.

[0026] On the other hand, a method for preparing a display module is provided. The method for preparing a display module comprises: providing a display panel, the display panel comprising a display portion, a bending portion and a binding portion connected in sequence, bending the bending portion so that the binding portion is located on the non-display side of the display portion; stacking a cover plate on the display side of the display portion, the boundary of the cover plate being farther away from the display portion than the boundary of the bending portion that is farthest from the display portion; forming a first frame on a side of the cover plate close to the display panel, the first frame extending along the side of the cover plate corresponding to the binding portion.

[0027] The forming of the first frame includes: forming a first retaining wall at the edge area of ​​the cover plate by a printing process; forming a second retaining wall on the side of the binding portion away from the cover plate by a printing process, with a spacing 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 portion.

[0028] The preparation method of the above-mentioned display module does not require the use of a mold in the process of forming the first frame. On the one hand, it can avoid the problem that the first frame is prone to defects during the demolding process. On the other hand, since different models of display modules use different molds when forming the first frame through the injection molding process, corresponding molds need to be made separately. Therefore, the method of forming the first frame in the embodiment of the present disclosure can reduce the production cost of the first frame and further reduce the production cost of the display module.

[0029] 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 storage 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; injecting glue into the storage space through the pouring hole through a glue pouring process, and evacuating the storage space through the exhaust hole, so that the glue fills the storage space to form a first filling part.

[0030] In some embodiments, forming the top cover includes: forming a support layer at 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 by a printing process.

[0031] In some embodiments, forming the first filling portion includes: setting 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 make the glue containing conductive particles or magnetic particles flow to the side close to the cover plate and flow to between the cover plate and the bending portion.

[0032] In some embodiments, forming the first filling portion includes: forming a magnetic ink layer in an edge area of ​​the cover plate on a side 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.

[0033] 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 shape 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.

[0034] 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 is connected to the first frame to form a frame surrounding the display panel.

[0035] The forming of the second frame includes: forming a third retaining wall in the edge area of ​​the cover plate by 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 by 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 by a printing process or a glue pouring process.

[0036] In some embodiments, before the bending portion is bent 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.

[0037] In another aspect, a display device is provided. The display device comprises: a display module and a middle frame as in any of the above embodiments. The middle frame is arranged around the display module. 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 to 0.5 mm.

[0038] The above-mentioned display device has the same structure and beneficial technical effects as the display modules provided in some of the above-mentioned embodiments, which will not be described in detail here.

[0039] In some embodiments, the middle frame includes a first portion and a second portion, the first portion is arranged 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

[0040] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0041] Figure 1A is a structural diagram of a display device according to the related art;

[0042] Figure 1B for Figure 1A A cross-sectional structural diagram of the display device along section line JJ;

[0043] Figure 2 is a structural diagram of a display device according to some embodiments;

[0044] Figure 3A for Figure 2 A cross-sectional structural diagram of the display device along section line ZZ;

[0045] Figure 3B for Figure 3A A rear structural diagram of a display device in FIG.

[0046] Figure 4 is a structural diagram of a display module according to some embodiments;

[0047] Figure 5 is another structural diagram of a display module according to some embodiments;

[0048] Figure 6 is another structural diagram of a display module according to some embodiments;

[0049] Figure 7 is another structural diagram of a display module according to some embodiments;

[0050] Figure 8 for Figure 1A A cross-sectional structural diagram of the display device along the section line KK;

[0051] Fig. 9 is another back structural diagram of a display module according to some embodiments;

[0052] Fig.10 for Figure 2 A cross-sectional structural diagram of the display device along section line II;

[0053] Fig.11 is another back structural diagram of a display module according to some embodiments;

[0054] Fig.12 is another back structural diagram of a display module according to some embodiments;

[0055] Fig.13 is another back structural diagram of a display module according to some embodiments;

[0056] Fig.14 is another back structural diagram of a display module according to some embodiments;

[0057] Fig.15 is another back structural diagram of a display module according to some embodiments;

[0058] Fig.16 is a flow chart of a method for preparing a display module according to some embodiments;

[0059] Fig.17 is a structural diagram of a display module corresponding to step R1 in a method for preparing a display module according to some embodiments;

[0060] Fig.18 is a structural diagram of a display module corresponding to step R2 in a method for preparing a display module according to some embodiments;

[0061] Fig.19 is a flow chart of step R3 in a method for preparing a display module according to some embodiments;

[0062] Fig. 20 is a structural diagram of a display module corresponding to step R3 in a method for preparing a display module according to some embodiments;

[0063] Fig.21 is a flow chart of step R33 in a method for preparing a display module according to some embodiments;

[0064] Fig. 22 is a structural diagram of a display module corresponding to step R33 in a method for preparing a display module according to some embodiments;

[0065] Fig.23is a structural diagram of a display module corresponding to step R331 in a method for preparing a display module according to some embodiments;

[0066] Fig.24 is another flow chart of step R33 in the method for preparing a display module according to some embodiments;

[0067] Fig.25 is another structural diagram of a display module corresponding to step R33 in the method for preparing a display module according to some embodiments;

[0068] Fig.26 is another structural diagram of a display module corresponding to step R33 in the method for preparing a display module according to some embodiments;

[0069] Fig. 27 is a flow chart of step R1 in a method for preparing a display module according to some embodiments;

[0070] Fig.28 is a structural diagram of a display module corresponding to step R1 in a method for preparing a display module according to some embodiments;

[0071] Fig.29 is another flow chart of a method for preparing a display module according to some embodiments;

[0072] Fig.30 is a structural diagram of a display module corresponding to step R4 in a method for preparing a display module according to some embodiments;

[0073] Fig.31 is another structural diagram of a display module corresponding to step R4 in the method for preparing a display module according to some embodiments;

[0074] Fig.32 is another structural diagram of a display module corresponding to step R4 in the method for preparing a display module according to some embodiments;

[0075] Fig.33A for Fig.32 A cross-sectional structural diagram of the display module along the section line HH;

[0076] Fig.33B for Fig.32 A cross-sectional structural diagram of the display module along the section line GG;

[0077] Fig.34 is another flow chart of a method for preparing a display module according to some embodiments;

[0078] Fig.35 is a structural diagram of a display module corresponding to step R31' in a method for preparing a display module according to some embodiments;

[0079] Fig.36 is another structural diagram of a display module corresponding to step R31′ in a method for preparing a display module according to some embodiments;

[0080] Fig.37 is another flow chart of a method for preparing a display module according to some embodiments;

[0081] Fig.38 is a structural diagram of a display module corresponding to step R31A in a method for preparing a display module according to some embodiments;

[0082] Fig.39 is a structural diagram of a display module corresponding to step R32A in a method for preparing a display module according to some embodiments;

[0083] Fig.40 is a structural diagram of a display module corresponding to step R33A in a method for preparing a display module according to some embodiments;

[0084] Fig.41 is a flow chart of step R33A in a method for preparing a display module according to some embodiments;

[0085] Fig.42 is a structural diagram of a display module corresponding to step R331A in a method for preparing a display module according to some embodiments;

[0086] Fig.43 is a structural diagram of a display module corresponding to step R332A in a method for preparing a display module according to some embodiments;

[0087] 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

[0088] 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 described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0089] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, 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" and the like are intended to indicate that specific 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 specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0090] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, 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.

[0091] 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.

[0092] “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.

[0093] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0094] 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 [a stated condition or event] is detected" are optionally interpreted to mean "upon determining that" or "in response to determining that" or "upon detecting [a stated condition or event]" or "in response to detecting [a stated condition or event]," depending on the context.

[0095] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0096] 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.

[0097] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation 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).

[0098] 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 the acceptable deviation range, wherein the acceptable deviation range is 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 a particular 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 may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0099] It will be understood that when a layer or an 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 between the layer or element and the other layer or substrate.

[0100] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the layers and the area of ​​the regions are exaggerated for clarity. Therefore, variations in the shapes relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations 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 shapes of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0101] 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.

[0102] 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.

[0103] like Figure 1A As shown, Figure 1A The structure diagram of a display device 1000' provided in the related art. The display device 1000' includes a display module 100' and a middle frame 200. The middle frame 200 is arranged around the display module 100'. The display module 100' includes a left frame 101, a bottom frame 102, a right frame 103 and an upper frame 104.

[0104] like Figure 1B As shown, Figure 1B for Figure 1A 1 is a cross-sectional view of the display device 1000' along the section line JJ. 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. The bending portion 12 is bent so that the binding portion 13 is located at the non-display side 11b of the display portion 11. The bending portion 12 and the binding portion 13 are located at the lower frame 102 of the display module.

[0105] The display section 11 includes a display area AA (ie, an area of ​​the display section 11 for image display) and a non-display area BB surrounding the display area (ie, an area of ​​the display section 11 surrounding the display area AA).

[0106] The middle frame 200 includes an inner wall 200 a and an outer wall 200 b .

[0107] The width of the lower frame 102 of the display module 100' refers to the distance between the boundary line between the display area AA and the non-display area BB of the display unit 11 and the inner side wall 200a of the middle frame 200 on the same side as the lower frame 102, that is, Figure 1B The distance from the dotted line B to the dotted line E along the X direction. The width of the lower frame 102 includes h1', h2 and h3.

[0108] 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 wall 200a of the middle frame 200; h2 is the width of the bending portion 12 in the X direction; h3 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 lower frame 102.

[0109] In order to increase the proportion of the display area AA of the display part 11 in the display module 100', it is necessary to reduce the width of the lower frame 102. Among them, the size of h3 is related to the circuit design of the display panel 10. It is difficult to reduce the value of h3 due to the influence of the process processing accuracy. The size of h2 can be achieved by reducing the bending radius of the bending part 12, but when the bending radius is reduced, the risk of the bending part 12 breaking will increase, and it is difficult to ensure the reliability during subsequent use. And because the bending part 12 of the display panel 10 is relatively fragile, when the display device 1000' falls or rolls, the bending part 12 of the display panel 10 is prone to shaking. At the same time, the inner side wall 200a of the middle frame 200 is prone to deformation when it is impacted by external force. If the distance between the middle frame 200 and the bending part 12 is too close, the middle frame 200 will squeeze the bending part 12 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 bent portion 12, that is, h1' needs to have a certain width, to prevent the inner side wall 200a of the middle frame 200 from deforming and hitting the bent portion 12 of the display panel 10 during the falling or tumbling process of the display device 1000'. If the value of h1' is reduced in order to reduce the width of the lower frame 102, the drop reliability of the display device 1000' will be reduced.

[0110] Based on this, Figure 2 As shown, 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.

[0111] Exemplarily, the display device 1000 may be any product or component with a display function, such as a television, a monitor, a laptop computer, a tablet computer, a mobile phone, or a navigator. Figure 2 In the figure, the display device 1000 is taken as a mobile phone as an example for illustration.

[0112] Exemplarily, the display device 1000 may be a liquid crystal display device (LCD); the display device 1000 may also be an electroluminescent display device or a photoluminescent display device. When the display device 1000 is an electroluminescent display device, the electroluminescent display device may be an organic light-emitting diode (OLED) or a quantum dot electroluminescent display device (QLED). When the display device 1000 is a photoluminescent display device, the photoluminescent display device may be a quantum dot photoluminescent display device.

[0113] The display module 100 includes a display area and a frame area surrounding the display area, wherein the display area of ​​the display module 100 and the display area AA of the display unit 11 are the same area, and 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 the embodiment of the present application to describe the frame of the display module 100 are mainly based on the display module 100 at the Figure 2 The negative direction of the X-axis is described as the bottom, the positive direction of the X-axis is the top, the negative direction of the Y-axis is the left side, and the positive direction of the Y-axis is the right side.

[0114] The structure of the display module 100 is described in detail below.

[0115] Figure 3A for Figure 2 FIG. 1 is a cross-sectional view of the display device 1000 along the section line ZZ. Figure 3A As shown, 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 which are connected in sequence.

[0116] 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, almost all of the display portion 11 is the display area AA; in a display device 1000 with a low 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.

[0117] In order to realize the screen display function of the display panel 10 , a display device is formed in the display portion 11 .

[0118] Exemplarily, 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.

[0119] 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.

[0120] 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.

[0121] 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 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 according to the actual needs of the display panel 10.

[0122] 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 both sides 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, so as to form a curved display device.

[0123] For example, the outer wall of the bending portion 12 of the display panel 10 (the side wall of the bending portion 12 close to the middle frame 200) may be covered with a protective adhesive layer 70 to reduce the probability of the display panel 10 being broken. The protective adhesive layer 70 may be, for example, MCL (Micro Coating Layer).

[0124] Understandably, Figure 3A Only the edge portion of the display portion 11 is shown, that is, the portion of the display portion 11 corresponding to the binding portion 13. In fact, the display portion 11 is arranged along the Figure 3AThe binding portion 13 continues to extend in the X direction (rightward direction) of the display portion 11, and after being bent to the non-display side 11b of the display portion 11, it only corresponds to a partial area of ​​the display portion 11.

[0125] The binding part 13 may be located on any side of the display part 11, that is, located at any position of the left frame 101, the lower frame 102, the right frame 103 and the upper frame 104 of the display module; the display device 1000 may also include multiple binding parts 13, and the multiple binding parts 13 may be located on at least two sides of the display part 11, that is, located at any at least two positions of the left frame 101, the lower frame 102, the right frame 103 and the upper frame 104 of the display module. The following description is based on the example that the binding part 13 is located on the lower side of the display part 11, that is, located at the lower frame 102 of the display module.

[0126] Please continue reading Figure 3A The display module 100 further includes a cover plate 30. The cover plate 30 is stacked on the display side 11a of the display unit 11. The cover plate 30 can separate the display panel 10 from the external environment and provide protection for the display panel 10.

[0127] 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.

[0128] 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 material.

[0129] Exemplarily, the cover plate 30 may be a silicate glass cover plate, curved glass or ultra-thin glass; at the same time, the cover plate 30 may also be a flexible polymer film cover plate, such as transparent polyimide or PET or polyurethane, etc., and may also be a combination of the above layers of polymer films, or a combination of polymer film and glass.

[0130] The middle frame 200 is arranged 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 wall 200a and an outer wall 200b. The inner wall 200a is a side wall of the middle frame 200 close to the bending portion 12, and the outer wall 200b is a side wall of the middle frame 200 away from the bending portion 12.

[0131] like Figure 3A and Figure 3B As shown, Figure 3B for Figure 2The back side of the display device 1000 (i.e., the side where the binding portion 13 of the display device 1000 is located) is shown in FIG. The display module 100 further includes a first frame 21, which is disposed on a side of the cover plate 30 close 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 side wall 200a of the middle frame 200.

[0132] It should be noted that Figure 3B The dotted lines on both sides of the first frame 21 refer to the boundaries of the first frame 21 in the Y direction.

[0133] By providing the first frame 21 between the bent portion 12 and the inner side wall 200a of the middle frame 200, the first frame 21 can protect the bent portion 12 during the process of the display device 1000 falling or rolling. Figure 1B Compared with the related art shown, Figure 3A In the embodiment shown, the first frame 21 is provided to protect the bent portion 12 during the falling or rolling process of the display device 1000, so that the distance between the tangent line of the outer edge of the bent portion 12 in the Z direction and the inner side wall 200a of the middle frame 200 can be reduced, that is, Figure 3A The width h1 of the tangent line of the outer edge of the middle bending portion 12 in the Z direction to the inner side wall 200a of the middle frame 200 is less than Figure 1B The width h1' from the tangent line of the outer edge of the middle bending portion 12 in the Z direction to the inner sidewall 200a of the middle frame 200 is beneficial to reduce the size of the lower frame 102 of the display module 100, and further realize a narrow frame of the display device 1000.

[0134] The material of the first frame 21 can be selected from materials with a smaller elastic modulus, so as to provide a buffer space for the deformation of the middle frame 200 when the middle frame 200 is subjected to external impact force, and to prevent stress from being transmitted to the bending portion 12. The elastic modulus of the first frame 21 is smaller than that of the middle frame 200, and materials such as resin can be used.

[0135] In some embodiments, Figure 3A As shown, the distance S1 between the first frame 21 and the inner side wall 200a of the middle frame 200 is 0 mm to 0.5 mm.

[0136] For example, the distance S1 between the first frame 21 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.

[0137] The distance S1 between the first frame 21 and the inner side wall 200a of the middle frame 200 can be 0. In this case, the first frame 21 and the inner side wall 200a of the middle frame 200 are in contact, and the width h1 of 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 is reduced to a minimum, which greatly reduces the width of the lower frame 102 of the display module 100. The distance S1 between the first frame 21 and the inner side wall 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 side wall 200a of the middle frame 200 to meet the process margin of the display module assembly and provide space for releasing stress for the deformation of some components in the display module (such as deformation caused by thermal expansion and contraction).

[0138] 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.

[0139] In some embodiments, Figure 3A As shown, 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 an 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.

[0140] 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 improve the stability of the first frame 21 and further improve the protection effect of the bending portion 12 of the display panel 10.

[0141] In some embodiments, Figure 3A As shown, the display module 100 further includes a first back film 51 and a second back film 52. The first back film 51 is disposed on the non-display side 11b of the display unit 11, and the second back film 52 is disposed on a side of the binding unit 13 close to the display unit 11 and closer to the display unit 11 than the binding unit 13.

[0142] By setting the first back film 51 and the second back film 52, when the display panel 10 is bent by 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.

[0143] Exemplarily, 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).

[0144] Exemplarily, 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 adhesive (Optically Clear Adhesive, OCA for short), which is helpful to ensure the light transmittance of the display panel 10 .

[0145] In some embodiments, Figure 3A As shown, the display module 100 further includes a heat dissipation film 80. The heat dissipation film 80 is stacked on a side of the first back film 51 away from the display portion 11 and is disposed between the display portion 11 and the binding portion 13 to dissipate heat.

[0146] Exemplarily, the heat dissipation film 80 may be a composite film composed of mesh glue, foam and copper foil.

[0147] In some embodiments, Figure 3A As shown, the display module 100 further includes a spacer 42 , which 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 .

[0148] In some embodiments, Figure 3A As shown, 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 .

[0149] Exemplarily, the adhesive layer 41 may be OCA (Optically Clear Adhesive) or OCR (Optical Clear Resin).

[0150] In some embodiments, Figure 3A As shown, 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 is located at an edge region of the cover plate 30. The main function of the ink layer 90 is to prevent light leakage from the side of the display panel 10.

[0151] In some embodiments, Figure 3AAs shown, 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 a control signal to the display panel 10, and the FPC cable 60 is used to connect to the driver chip to transmit the control signal provided by the driver chip to the display panel 10.

[0152] The structure of the first frame 21 in the display module 100 is described in detail below.

[0153] like Figure 4 As shown, 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 area of ​​the cover plate 30, the first end 212a of the second retaining wall 212 is connected to the binding portion 13, and there is a distance d2 between the first retaining wall 211 and the second retaining wall 212. The first filling portion 213 is filled between the first retaining wall 211 and the second retaining wall 212.

[0154] It is understandable that, in the embodiment of the present disclosure, the first retaining wall 211 and the second retaining wall 212 may be formed by a printing process, and the first filling portion 213 may be formed by a printing or glue pouring process. In order to allow the first filling portion 213 to more fully cover the bending portion 12 to better protect the bending portion 12, the material used to form the first filling portion 213 may be a material with a lower viscosity, so that 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 direction of the cover plate 30 to cover more of the bending portion 12.

[0155] The first retaining wall 211 and the second retaining wall 212 serve as a blocking structure of the first filling portion 213 to prevent the material of the first filling portion 213 from overflowing, and in order to improve the forming rate of the first retaining wall 211 and the second retaining wall 212 formed by printing, the material used to form the first retaining wall 211 and the second retaining wall 212 can be a material with a higher viscosity. That is, 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.

[0156] As described above, the first frame 21 can be made of a material with a relatively small elastic modulus. On this basis, illustratively, 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.

[0157] In some embodiments, the materials used to form the first retaining wall 211, the second retaining wall 212 and the first filling part 213 are the same, but the viscosity is different. In this way, the first retaining wall 211, the second retaining wall 212 and the first filling part 213 after curing and forming are an integrated structure, that is, the first frame 21 is an integrated structure. It can be understood that the "same material" means that the main material of the first retaining wall 211, the second retaining wall 212 and the first filling part 213 is the same, and the first retaining wall 211, the second retaining wall 212 and the first filling part 213 can be mixed with other materials of different types, or other materials of the same type but different contents. For example, by mixing other materials of different contents into the same main material, the viscosity of the first filling part 213 can be lower, while the viscosity of the first retaining wall 211 and the second retaining wall 212 can be higher.

[0158] On this basis, if Figure 5 As shown, 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 a 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.

[0159] In some embodiments, Figure 5 As shown, 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.

[0160] The top cover 214 is respectively 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 respectively connected to the second end 211b of the first retaining wall 211 and the second end 212b of the second retaining wall 212 .

[0161] 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 .

[0162] The glue material used to form the first filling portion 213 can enter the accommodation space f1 through the pouring hole 2151, and the exhaust hole 2152 can be used to evacuate the accommodation space f1, which is conducive to the glue material used to form the first filling portion 213 flowing toward the side close to the cover plate 30 and flowing between the cover plate 30 and the bending portion 12. Figure 7 and Figure 8The area f11 enclosed by the dotted line frame can increase the contact area between the first filling portion 213 and the bent portion 12 , which is beneficial to further protect the bent portion 12 of the display panel 10 and improve the compression strength of the bent portion 12 of the display panel 10 .

[0163] On this basis, if Figure 5 As shown, the first retaining wall 211 and the second retaining wall 212 are both provided with a groove 216 at one end 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. The edge of the top cover 214 can be placed in the groove 216, which is conducive to improving the stability of the top cover 214.

[0164] For example, Figure 6 As shown, the top cover 214 may include a support layer 2141 and a main body layer 2142 which are stacked, and 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, which is beneficial to further improve the stability of the top cover 214.

[0165] 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 layer 2142 may be connected to the first retaining wall 211 and the second retaining wall 212 through the mesh of the metal mesh.

[0166] 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 a printing process and improves the molding rate.

[0167] 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 supporting layer 2141 is embedded in the integrated structure formed by the first retaining wall 211, the second retaining wall 212, the first filling part 213 and the main layer 2142.

[0168] In some embodiments, Figure 7 As shown, magnetic particles 217 are disposed in the first filling portion 213 .

[0169] In the process of forming the first filling portion 213, by applying a magnetic field force on the side of the display module 100 close to the cover plate 30, the magnetic particles 217 move toward the cover plate 30 under the action of the magnetic field force, which is conducive to the glue used to form 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, Fig.10 The area f11 enclosed by the dotted line frame can increase the contact area between the first filling portion 213 and the bent portion 12 , which is beneficial to further protect the bent portion 12 of the display panel 10 and improve the compression strength of the bent portion 12 of the display panel 10 .

[0170] Alternatively, the material of the ink layer 90 is set to be magnetic ink. In the process of forming the first filling portion 213, the glue material 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, Fig.10 The first filling portion 213 formed in the area f11 enclosed by the middle dotted frame is in contact with 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 compression strength of the bending portion 12 of the display panel 10.

[0171] Exemplarily, the magnetic particles 217 include at least one of magnetic nanoparticles and magnetic polymer particles, such as magnetic ferrosoferric oxide or polystyrene microspheres.

[0172] 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.

[0173] 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%.

[0174] In other embodiments, Figure 7 As shown, conductive particles 218 are arranged in the first filling portion 213. By arranging the conductive particles 218 in the first filling portion 213, the conductive particles 218 move toward the direction of 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 close to the cover plate 30, it is beneficial to make the glue used to form the first filling portion 213 flow to the side close to the cover plate 30 and flow to between the cover plate 30 and the bending portion 12, that is, Fig.10The area f11 enclosed by the dotted line frame can increase the contact area between the first filling portion 213 and the bent portion 12 , which is beneficial to further protect the bent portion 12 of the display panel 10 and improve the compression strength of the bent portion 12 of the display panel 10 .

[0175] For example, 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.

[0176] 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.

[0177] 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%.

[0178] In some embodiments, Figures 4 to 7 As shown, the display module 100 further includes a third filling portion 219. The bending portion 12 of the display panel 10 is bent to form a cavity toward the display portion 11, and the third filling portion 219 is filled in the cavity formed by the bending portion 12. By filling the third filling portion 219 in the cavity of the bending portion 12 toward the display portion 11, the bending portion 12 can be further protected, which is conducive to further improving the anti-extrusion strength of the bending portion 12.

[0179] Exemplarily, the material used to form the third filling portion 219 may be the same as the material used to form the first filling portion 213, for example, Figure 5 and Figure 6 As shown, the first frame 21 includes a top cover 214. In the process of forming the first filling portion 213 through the 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 evacuate 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.

[0180] 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 are made of the same material, but can be formed in different steps. For example, before the bending 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 can be formed on one side of the bending portion 12 in advance, and then the bending portion 12 is bent, and then the first frame 21 including the first filling portion 213 is formed.

[0181] 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. Figure 7 As shown, before the bending portion 12 is bent so that the binding portion 13 is located on the non-display side 11b of the display portion 11, a third filling portion 219 is formed on one side of the bending portion 12, and then the bending portion 12 is bent, 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.

[0182] Please refer again Figure 1A In the case where the bending portion 12 and the binding portion 13 of the display panel 10 are only provided at the position of the lower frame 102, the structures of the display device 1000' at the corresponding positions of the left frame 101, the right frame 103 and the upper frame 104 of the display module 100' are basically the same. The structure of the display device 1000' at the corresponding position of the left frame 101 of the display module 100' is taken as an example for explanation below. Figure 8 for Figure 1A FIG. 1 is a cross-sectional view of the display device 1000 ′ along the section line KK.

[0183] like Figure 8 As shown, the width of the left frame 101 of the display module 100' refers to the distance between the boundary line between the display area AA and the non-display area BB of the display unit 11 and the inner side wall 20a of the middle frame 200 on the same side as the left frame 101, that is, Fig.11 The distance from the dotted line L to the dotted line N along the Y direction. The width of the left frame 101 includes h4' and h5.

[0184] 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 .

[0185] In order to increase the proportion of the display area AA of the display part 11 in the display module 100', it is necessary to reduce the width of the left frame 101. Among them, the size of h5 is related to the circuit design of the display panel 10. It is difficult to reduce the value of h5 due to the influence of the process processing accuracy. And because the inner side wall 200a of the middle frame 200 is easily deformed when the display device 1000' falls or rolls over, if the distance between the middle frame 200 and the display part 11 is too close, the middle frame 200 will squeeze the display part 11 of the display panel 10, causing the display panel 10 to display abnormally. Therefore, a certain gap should be maintained between the middle frame 200 and the bending part 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 is deformed and hits the display part 11 of the display panel 10 during the falling or rolling process of the display device 1000'. 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.

[0186] Based on this, Fig. 9 As shown, Fig. 9 1 is a structural diagram of a display module 100 in some embodiments of the present disclosure. The display module 100 further includes a second frame 22, and the first frame 21 and the second frame 22 are connected to form a frame shape surrounding the display panel 10. The second frame 22 is at least arranged on the left frame 101, the right frame 103 and the upper frame 104 of the display module 100.

[0187] The above-mentioned “the second frame 22 is at least arranged on the left frame 101, the right frame 103 and the upper frame 104 of the display module 100” means: the second frame 22 can be arranged only on the left frame 101, the right frame 103 and the upper frame 104 of the display module 100, and its ends are respectively connected to the end of the first frame 21 at the junction of the left frame 101 and the lower frame 102, and at the junction of the right frame 103 and the lower frame 102; or, the end of the second frame 22 can also extend to the lower frame 102 of the display module 100 and be connected to the end of the first frame 21 in the lower frame 102, that is, the second frame 22 is arranged on the left frame 101, the lower frame 102, the right frame 103 and the upper frame 104 of the display module 100.

[0188] 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.

[0189] Since the structures of the display device 1000 at the corresponding positions of the left frame 101, the right frame 103 and the upper frame 104 of the display module 100 are basically the same, the structure of the display device 1000 at the corresponding position of the left frame 101 of the display module 100 is taken as an example for description. Fig.10 for Figure 2 FIG. 1 is a cross-sectional view of the display device 1000 along section line II.

[0190] like Fig.10 As shown, 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 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.

[0191] By providing the second frame 22 between the edge of the display portion 11 of the display panel 10 and the inner side wall 200a of the middle frame 200, the second frame 22 can protect the display portion 11 during the process of the display device 1000 falling or rolling. Fig.11 Compared with the related art shown in FIG. Fig.13 In the embodiment shown, the second frame 22 is provided to protect the display portion 11 during the process of the display device 1000 falling or rolling, so that the distance between the edge of the display portion 11 and the inner side wall 200a of the middle frame 200 can be reduced. Fig.13 The width h4 from the edge of the middle display portion 11 to the inner side wall 200a of the middle frame 200 is less than Fig.11 The width h4' from the edge of the middle display portion 11 to the inner side wall 200a of the middle frame 200 is helpful to reduce the size of the left frame 101 of the display module 100, and further realize the narrow frame of the display device 1000.

[0192] The material of the second frame 22 can be selected from materials with a smaller elastic modulus, so as to provide a buffer space for deformation of the middle frame 200 when the middle frame 200 is subjected to external impact force, 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 materials such as resin can be used.

[0193] Similarly, since the second frame 22 is also disposed on the right frame 103 and the upper frame 104 of the display module 100 , the size 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 .

[0194] In some embodiments, please refer to Fig.10 , a distance S2 between the second frame 22 and the inner side wall 200a of the middle frame 200 is 0 mm to 0.5 mm.

[0195] For example, the distance S2 between the second frame 22 and the inner side wall 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.

[0196] That is to say, the distance S2 between the second frame 22 and the inner side wall 200a of the middle frame 200 can be 0. In this case, the second frame 22 and the inner side wall 200a of the middle frame 200 are in contact, and the width h1 of 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 is reduced to a minimum, which greatly reduces the width of the left frame 101 of the display module 100. The distance S2 between the second frame 22 and the inner side wall 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 side wall 200a of the middle frame 200 to meet the process margin of the display module assembly and provide space for releasing stress for the deformation of some components in the display module (such as deformation caused by thermal expansion and contraction).

[0197] 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.

[0198] In some embodiments, please refer to Fig.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 an 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.

[0199] 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 improve the stability of the second frame 22 and further improve the protection effect of the display part 11 of the display panel 10.

[0200] In some embodiments, Fig. 9As shown, 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.

[0201] 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.

[0202] In some embodiments, Fig.11 and Fig.12 As shown, 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 . Part of the second frame 22 extends to the lower frame 102 and connects to the first frame 21 .

[0203] In some embodiments, Fig.13 As shown, 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 arranged on the left frame 101, the right frame 103 and the upper frame 104, and is connected to the first frame 21 arranged on the lower frame 102.

[0204] 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.

[0205] In some embodiments, Fig. 9 and Fig.11 As shown, 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 the direction perpendicular to its own length extension) are the same or substantially the same. This makes the frame widths of the display module 100 uniform everywhere.

[0206] In other embodiments, Fig.12 and Fig.13As shown, 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 or substantially the same as the width L6 of the first retaining wall 211 of the first frame 21 (i.e., the size of the first retaining wall 211 in the X direction) or the width L7 of the second retaining wall 212 (i.e., the size of the second retaining wall 212 in the X direction). Since the bending portion 12 and the binding portion 13 are located at the position of the lower frame 102, the first frame 21 can better cover and protect the bending portion 12 by setting the width of the first frame 21 larger; and 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, so that the second frame 22 and the first retaining wall 211 (or the second retaining wall 212) can be prepared 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 is conducive to simplifying the preparation process of the display module.

[0207] The structure of the second frame 22 of the display module 100 is described in detail below.

[0208] In some embodiments, Fig.11 , Fig.12 and Fig.13 As shown, the second frame 22 is a single-layer structure.

[0209] 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 includes only one film layer structure.

[0210] In other embodiments, Fig.10 As shown, Fig.10 for Figure 2 The second frame 22 is a composite structure (i.e., the second frame 22 includes multiple film structures along a direction perpendicular to the length extension direction 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 area of ​​the cover plate 30, and the first end 222a of the fourth retaining wall is connected to the display portion 11. There is a spacing d3 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.

[0211] It is understandable that in the embodiment of the present disclosure, the third retaining wall 221 and the fourth retaining wall 222 may be formed by a printing process, and the second filling portion 223 may be formed by 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 to better protect the display portion 11, the material used to form the second filling portion 223 may be a material with a lower viscosity, so that 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 direction of the cover plate 30 to cover more of the display portion 11.

[0212] The third retaining wall 221 and the fourth retaining wall 222 serve as a blocking structure of the second filling portion 223 to prevent the material of the second filling portion 223 from overflowing, and in order to improve the forming rate of the third retaining wall 221 and the fourth retaining wall 222 formed by 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. That is, 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.

[0213] As mentioned above, the second frame 22 can be made of a material with a relatively small 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.

[0214] In some embodiments, the materials used to form the third retaining wall 221, the fourth retaining wall 222 and the second filling part 223 are the same, but the viscosity is different or the materials used to form the third retaining wall 221, the fourth retaining wall 222 and the second filling part 223 contain the same components, so that the third retaining wall 221, the fourth retaining wall 222 and the second filling part 223 after curing and forming are an integral structure, that is, the second frame 22 is an integral structure. It can be understood that the "same material" means that the main material of the third retaining wall 221, the fourth retaining wall 222 and the second filling part 223 is the same, and the third retaining wall 221, the fourth retaining wall 222 and the second filling part 223 can be mixed with other materials of different types, or other materials of the same type but different contents. For example, by mixing other materials of different contents into the same main material, the viscosity of the second filling part 223 can be lower, while the viscosity of the third retaining wall 221 and the fourth retaining wall 222 can be higher.

[0215] 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.

[0216] In some embodiments, Fig.14 As shown, 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 the top cover 214 is arranged 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. A plurality of through holes 215 are opened on the top cover 214.

[0217] 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.

[0218] Exemplarily, the through hole 215 includes at least one pouring hole 2151 and at least one vent hole 2152, that is, the top cover 214 is provided with both the pouring hole 2151 and the vent hole 2152. The number of the pouring holes 2151 and the vent hole 2152 on the top cover 214 may be the same or different. For example, the number of the pouring holes 2151 and the number of the vent holes 2152 on the top cover 214 may both be 1, 2, 3, etc.; or, the number of the pouring holes 2151 on the top cover 214 may be 1, and the number of the vent holes 2152 may be 2.

[0219] 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 by 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.

[0220] 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.

[0221] In some embodiments, when the top cover 214 includes a supporting 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 supporting layer 2141 is embedded in the integrated structure formed by 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.

[0222] For example, Fig.14 As shown, 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 second frame 22 where the through hole 215 is not set. On the one hand, it ensures that the through hole 215 has a sufficient size to facilitate 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.

[0223] It is understandable 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 are enclosed to form an accommodation space, the through hole 215 can also be provided on the portion of the top cover 214 corresponding to the first frame 21. When the through hole 215 is provided on the portion of the top cover 214 corresponding to the first frame 21, the width of the position where the through hole 215 is located on the first frame 21 can be greater than the width of the first frame 21 where the through hole 215 is not provided. On the one hand, it is ensured that the through hole 215 has a sufficient size to facilitate glue filling or vacuuming, and on the other hand, it can be ensured that the width of the portion of the first frame 21 where the through hole 215 is not provided is small, thereby ensuring the realization of a narrow frame of the display device 1000.

[0224] Considering that if the first filling portion 213 and / or the second filling portion 223 are formed by one-time glue pouring, the glue may not be able to fully fill the accommodation space formed 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. Therefore, in some embodiments, Fig.15As shown, the display module 100 further includes at least one fifth retaining wall 231, which is disposed in the receiving 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, and divides the receiving space into a plurality of sub-receiving spaces. By disposing the fifth retaining wall 231 to divide the receiving space 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.

[0225] 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 may be formed simultaneously, which is beneficial to simplifying the process steps and reducing the process difficulty.

[0226] 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 a plurality of sub-storage spaces, the top cover 214 may be provided with a plurality of 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.

[0227] 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.

[0228] The following is a detailed description of the method for preparing the display module 100 .

[0229] like Fig.16 , Fig.17 , Fig.18 and Fig. 20 As shown, Fig.16 is a flow chart showing a method for preparing the module 100 in some embodiments of the present disclosure, Fig.17 , Fig.18 and Fig. 20 Based on Fig.16 The structure diagram corresponding to each step in the manufacturing method of the display module 100 is provided. The manufacturing method of the display module 100 includes the following steps:

[0230] R1: Fig.17As shown, a display panel 10 is provided, and the display panel 10 includes a display portion 11, a bending portion 12 and a binding portion 13 connected in sequence, and the bending portion 12 is bent so that the binding portion 13 is located on the non-display side 11b of the display portion 11;

[0231] R2: Fig.18 As shown, 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 that is farthest from the display portion 11, that is, the orthographic projection of the boundary of the bending portion 12 that is 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.

[0232] R3: Fig. 20 As shown, 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 .

[0233] The steps of forming the first frame 21 are described in detail below.

[0234] like Fig.19 and Fig. 20 As shown, Fig.19 is a flowchart of steps for forming the first frame 21 according to some embodiments of the present disclosure. Fig. 20 Based on Fig.19 The steps of forming the first frame 21 are provided with structural diagrams corresponding to the steps. The steps of forming the first frame 21 include:

[0235] R31: forming a first retaining wall 211 at the edge area of ​​the cover plate 30 by a printing process;

[0236] R32: a second retaining wall 212 is formed on a side of the binding portion 13 away from the cover plate 30 by a printing process, and a distance d2 is provided between the second retaining wall 212 and the first retaining wall 211;

[0237] R33: Form a first filling portion 213 between the first retaining wall 211 and the second retaining wall 212 by a printing process or a glue pouring process.

[0238] 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 bending portion 12 to better protect the bending 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 pouring glue, the material of the first filling portion 213 can flow more easily toward the cover plate 30 to cover more of the bending portion 12.

[0239] 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 first retaining wall 211 and the second retaining wall 212 formed by printing, the material used to form the first retaining wall 211 and the second retaining wall 212 can be a material with a higher viscosity.

[0240] The above method for forming the first frame 21 is: firstly, the first retaining wall 211 and the second retaining wall 212 are formed respectively by a printing process, and then the first filling part 213 is formed between the first retaining wall 211 and the second retaining wall 212 by a printing process or a glue injection process. Compared with the formation of 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 the first frame 21 from being easily defective during the demoulding process. On the other hand, since 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 respectively. 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.

[0241] Exemplarily, the material used to form the first retaining wall 211 , the second retaining wall 212 , and the first filling part 213 may be polyimide or epoxy resin.

[0242] Exemplarily, the above printing process may be a 3D printing process.

[0243] Exemplarily, 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, ultraviolet curing can be used to accelerate the molding of the first filling portion 213.

[0244] In some embodiments, Figure 5 As shown, 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.

[0245] like Fig. 20 As shown, 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 by a printing process or a glue filling process, the area between the cover plate 30 and the bending portion 12 (i.e. Fig. 20The gap in the area f11) circled by the dotted line is relatively small, and 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 .

[0246] Based on this, in some embodiments, such as Fig.21 and Fig. 22 As shown, Fig.21 is a flowchart of step R33 of forming the first frame 21 according to some embodiments of the present disclosure, Fig. 22 Based on Fig.21 The structural diagram corresponding to each step in the step R33 of forming the first frame 21 is provided. In the above steps of forming the first frame 21, after step R32, step R33 specifically includes the following steps:

[0247] 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 are enclosed to form a accommodating space f1.

[0248] 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 ;

[0249] R332: The material (glue) used to form the first filling part 213 is injected into the accommodating space f1 through the pouring hole 2151 by the glue pouring process, and the accommodating space f1 is evacuated 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.

[0250] After the material for forming the first filling portion 213 enters the accommodation space f1 through the pouring hole 2151, the accommodation space f1 is evacuated 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. Fig. 22 The area f11 enclosed by the dotted line frame can increase the contact area between the first filling portion 213 and the bent portion 12 , which is beneficial to further protect the bent portion 12 of the display panel 10 and improve the compression strength of the bent portion 12 of the display panel 10 .

[0251] For example, Fig.23As shown, 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 (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), 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.

[0252] The support layer 2141 can play a supporting role when the main layer 2142 is formed by a printing process. On the one hand, it is conducive to the molding of the main layer 2142, and on the other hand, it can also make the molded main layer 2142 have a flat surface.

[0253] By way of example, when the top cover 214 is formed through the above steps, a hole core having the same diameter as the pouring hole 2151 and the exhaust hole 2152 may be reserved before forming the support layer 2141 and the main layer 2142, and the hole core may be pulled out after the top cover 214 is formed to obtain the pouring hole 2151 and the exhaust hole 2152. The material of the hole core may be metal, such as aluminum.

[0254] For example, Fig.23 As shown, when the first retaining wall 211 and the second retaining wall 212 are formed by a printing process, grooves 216 are formed at one end 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 the support layer 2141 is formed, and on the other hand, they 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.

[0255] Exemplarily, the material of the support layer 2141 may be a metal mesh.

[0256] Exemplarily, the material used to form the main body layer 2142 may be a resin, such as a photosensitive resin.

[0257] In some embodiments, please refer to Fig.21 and Fig. 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 .

[0258] It can be 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.

[0259] In other embodiments, Fig.24, Fig.25 and Fig.26 As shown, Fig.24 is a flowchart of step R33 of forming the first frame 21 according to some embodiments of the present disclosure, Fig.25 and Fig.26 Based on Fig.24 The structural diagram corresponding to each step in the step R33 of forming the first frame 21 provided. In the above steps of forming the first frame 21, after step R32, step R33 specifically includes the following steps:

[0260] R331': Fig.25 or Fig.26 As shown, the material (ie, glue) for forming the first filling portion 213 and containing conductive particles 218 or magnetic particles 217 is disposed between the first retaining wall 211 and the second retaining wall 212 .

[0261] R332': Fig.25 As shown, an electric field force or a magnetic field force is applied to the accommodation space f1 in the display module 100 on the side of the cover plate 30 away from the display panel 10. That is to say, when the material used to form the first filling portion 213 contains conductive particles 218, an electric field force is applied to the accommodation space f1 in the display module 100 on the side of the cover plate 30 away from the display panel 10; and when the material used to form the first filling portion 213 contains magnetic particles 217, a magnetic field force is applied to the accommodation space f1 in the display module 100 on the side of the cover plate 30 away from the display panel 10. The material (i.e., the glue) used to form the first filling portion 213 containing conductive particles 218 or magnetic particles 217 is caused to move toward the side (i.e., the side) close to the cover plate 30. Fig.25 The liquid flows in the direction of the black arrow in the middle of the liquid and flows between the cover plate 30 and the bent portion 12, that is, Fig.25 The area f11 framed by the dotted line can increase the contact area between the first filling portion 213 and the bent portion 12 , which is beneficial to further protect the bent portion 12 of the display panel 10 and improve the compression strength of the bent portion 12 of the display panel 10 .

[0262] Or, if Fig.26 As shown, 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., the glue material) used to form the first filling portion 213 containing the magnetic particles 217 flows toward the direction close to the magnetic ink layer and flows to between the cover plate 30 and the bending portion 12, i.e. Fig.26The first filling portion 213 formed in the area f11 enclosed by the middle dotted frame is in contact with 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 compression strength of the bending portion 12 of the display panel 10.

[0263] In some embodiments, step R1 in the method for preparing the display module 100 further includes forming a third filling portion 219. Fig. 27 and Fig.28 As shown, Fig. 27 is a flow chart of step R1 in the method for preparing the display module 100 in some embodiments of the present disclosure, Fig.28 Based on Fig. 27 The structure diagram corresponding to each step in step R1 of the manufacturing method of the display module 100 provided. The above step R1 includes:

[0264] R11: Provide a display panel 10 , wherein the display panel 10 includes a display portion 11 , a bending portion 12 , and a binding portion 13 that are sequentially connected, and a third filling portion 219 is formed on a side of the bending portion 12 away from the cover plate 30 .

[0265] R12: 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 .

[0266] It can be understood that, since 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 simultaneously, 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.

[0267] Exemplarily, the material used to form the third filling part 219 may be polyimide or epoxy resin.

[0268] Exemplarily, the third filling portion 219 may be formed by a glue potting process.

[0269] 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 shape surrounding the display panel 10. The step of forming the second frame 22 is described in detail below.

[0270] 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. Figure 29 to Figure 33B As shown, Fig.29is a flow chart of a method for preparing a display module 100 in some embodiments of the present disclosure. Figure 30 to Figure 32 Based on Fig.29 The structure diagram corresponding to the manufacturing method of the display module 100 provided, Fig.33A for Fig.31 or Fig.32 Cross-section along the HH section line, Fig.33B for Fig.31 or Fig.32 The cross-section along the GG section line, from Fig.33A The cross-sectional structure of the first frame 21 and the second frame 22 can be seen from Fig.33B The cross-sectional structure of the formed second frame 22 can be seen in FIG. Figure 30 to Figure 32 The difference is that the shapes of the first frame 21 and the second frame 22 are different. For details, please refer to Figure 11 to Figure 13 The description will not be repeated here.

[0271] It should be noted that Figure 29 to Figure 33B The example of forming the second frame 22 separately after forming the first frame 21 is used for illustration, but the order of forming the first frame 21 and forming the second frame 22 in the present disclosure is not limited to this.

[0272] Exemplarily, 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 second frame 22 formed by the injection molding process, no mold is required in the process of forming the second frame 22. On the one hand, it can avoid the second frame 22 from being easily defective 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 the printing process can reduce the production cost of the second frame 22 and further reduce the production cost of the display module 100.

[0273] 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 , so that the second frame 22 is easily formed when being formed by a printing process, which is beneficial to improving the forming rate of the second frame 22 .

[0274] Exemplarily, the material used to form the second frame 22 may be polyimide or epoxy resin.

[0275] Exemplarily, the material used to form the second frame 22 may be the same material as the material used to form the first retaining wall 211 or the material used to form the second retaining wall 212 , or may be different materials.

[0276] In some embodiments, when the second frame 22 is a single-layer structure, the second frame 22 may also be formed simultaneously with the first retaining wall 211 of the first frame 21 , or may be formed simultaneously with the second retaining wall 212 of the first frame 21 . Fig.34 , Fig.35 and Fig.36 The second frame 22 and the first retaining wall 211 are formed synchronously as an example. Fig.34 , Fig.35 and Fig.36 As shown, Fig.34 A flowchart of step R3 of synchronously forming the first retaining wall 211 and the second frame 22 in some embodiments of the present disclosure, Fig.35 and Fig.36 Based on Fig.34 The structure diagram corresponding to step R3 of synchronously forming the first retaining wall 211 and the second frame 22 is provided, and it should be noted that: Fig.35 and Fig.36 The dotted line along the X direction refers to the boundary line between the first retaining wall 211 and the second frame 22 . Fig.30 and Fig.32 The difference is that the shapes of the first retaining wall 211 and the second frame 22 are different. For details, please refer to Figure 12-13 The description will not be repeated here.

[0277] R31 ′: a first retaining wall 211 and a second frame 22 are formed in the edge area of ​​the cover plate 30 by a printing process.

[0278] The first retaining wall 211 and the second frame 22 are formed simultaneously by the printing process, which can simplify the process steps and is beneficial to improving the preparation efficiency of the first frame 21 and the second frame 22 .

[0279] It is understandable 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 them.

[0280] 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 simultaneously with the first frame 21. The following takes the synchronous formation of the second frame 22 and the first frame 21 as an example for explanation, but the order of forming the first frame 21 and forming the second frame 22 in the present disclosure is not limited to this. Figures 37 to 40 As shown, Fig.37 1 is a flow chart of step R3A of simultaneously 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. Figures 38 to 40 Based on Fig.37Structural diagrams corresponding to the steps in step R3A of simultaneously forming the first frame 21 and the second frame 22 in the method for manufacturing the display module 100 provided.

[0281] It should be noted that Fig.38 The dotted line extending along the X direction in FIG. 2 is the boundary line between the first retaining wall 211 and the third retaining wall 221. Fig.39 The dotted line extending along the X direction in FIG. 2 refers to the boundary line between the first retaining wall 211 and the third retaining wall 221, and the boundary line between the second retaining wall 212 and the fourth retaining wall 222. Fig.40 The dotted line extending along the X direction in FIG. 2 is a boundary line between the first frame 21 and the second frame 22 .

[0282] Step R3A of synchronously forming the first frame 21 and the second frame 22 includes:

[0283] R31A: Fig.38 As shown, a first retaining wall 211 and a third retaining wall 221 are formed in the edge area of ​​the cover plate 30 by a printing process, and the first retaining wall 211 and the third retaining wall 221 are enclosed into a frame shape;

[0284] R32A: Fig.39 As shown, 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, and the second retaining wall 212 and the fourth retaining wall 222 are enclosed into a frame shape;

[0285] R33A: Fig.40 As shown, 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, and a second filling portion 223 is formed between the third retaining wall 221 and the fourth retaining wall 222 .

[0286] It can be understood that since the first retaining wall 211 and the third retaining wall 221 are formed synchronously, the second retaining wall 212 and the fourth retaining wall 222 are formed synchronously, and the first filling section 213 and the second filling section 223 are formed synchronously, 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.

[0287] Through the above steps S31A to S33A, the first frame 21 and the second frame 22 are formed synchronously, so that the process steps can be simplified, which is beneficial to improving the preparation efficiency of the first frame 21 and the second frame 22.

[0288] In some embodiments, after the above step R32A, step R33A includes R331A and R332A. Fig.41 , Fig.42 and Fig.43 As shown, Fig.41 1 is a flow chart of step R33A 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. Fig.42 and Fig.43 Based on Fig.41 Structural diagrams corresponding to the steps in step R33A of simultaneously forming the first frame 21 and the second frame 22 in the method for manufacturing the display module 100 are provided.

[0289] It should be noted that Fig.42 and Fig.43 The dotted line extending along the X direction in FIG. 2 refers to the boundary line between the first frame 21 and the second frame 22 .

[0290] R331A: Fig.42 As shown, 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, and 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. A plurality of through holes 215 are provided on the top cover 214, and the through holes 215 include at least one pouring hole 2151 and at least one exhaust hole 2152, that is, the top cover 214 is provided with both the pouring hole 2151 and the exhaust hole 2152.

[0291] R332A: Fig.43 As shown, the material for forming the first filling part 213 and the second filling part 223 is injected into the accommodating space through the pouring hole 2151 and the accommodating space is evacuated through the exhaust hole 2152 so that the material for forming the first filling part 213 and the second filling part 223 fills the accommodating space and forms the first filling part 213 and the second filling part 223.

[0292] It should be noted that the structure and preparation method of the top cover 214 in this embodiment are substantially the same as the structure and preparation method of the aforementioned top cover 214 , and will not be described in detail herein.

[0293] In some embodiments, Fig.44As shown, 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 enclose 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 the improvement of the yield of the first frame 21 and the second frame 22.

[0294] Exemplarily, 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 preparation process and improving the preparation efficiency.

[0295] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display module, characterized in that: include: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The material of the main body layer is the same as that of the first retaining wall.

6. The display module according to claim 2, characterized in that: 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, characterized in that: 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, characterized in that: Magnetic particles or conductive particles are arranged in the first filling portion.

9. The display module according to claim 8, characterized in that: 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, characterized in that: 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, characterized in that: The ink layer has magnetic properties.

12. The display module according to any one of claims 8 to 11, characterized in that: 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 claim 1, characterized in that: 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, characterized in that: The width of the first frame is greater than the width of the second frame.

15. The display module according to claim 1, characterized in that: 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, characterized in that: 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, characterized in that: 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 claim 1, characterized in that: 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, characterized in that: 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, characterized in that: include: 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, characterized in that: Also includes: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: Also includes: 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, characterized in that: Also includes: 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 24, characterized in that: Before the bending portion is bent so that the binding portion is located on the non-display side of the display portion, the method further includes: A third filling portion is formed on one side of the bent portion.

28. A display device, characterized in that: include: 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, characterized in that 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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