Cover plate and display module

Abstract

The present disclosure relates to a cover plate and a display module. The cover plate of the present disclosure is applied to the display module and has an unfolded state and a folded state. The cover plate comprises a cover plate body. The cover plate body comprises at least one folding part and a plurality of cover plate parts. In the unfolded state of the cover plate, the plurality of cover plate parts are arranged along a first direction, and the folding part is connected between two adjacent cover plate parts. The folding part can be bent along a bending axis, and the extension direction of the bending axis intersects with the first direction and the thickness direction of the cover plate. The cover plate part has a first surface and a second surface arranged along the thickness direction of the cover plate, and the folding part is located between the plane of the first surface and the plane of the second surface, and the folding part and the adjacent cover plate part have an overlap in the orthographic projection on the reference plane. The reference plane is a plane perpendicular to the thickness direction of the cover plate. The cover plate part and the folding part in the cover plate of the present disclosure can be designed by splicing and combining different materials, so as to realize the foldability while improving the impact resistance of the display module.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, specifically to a cover plate and a display module. Background Technology

[0002] With the development of display technology, various new forms of display devices have become a hot topic for major screen manufacturers and terminal developers. For example, foldable display devices, such as foldable phones and foldable tablets, have attracted widespread attention. In related technologies, the display module of a bendable display device typically includes a flexible display panel and a cover plate disposed on the light-emitting side of the flexible display panel. The cover plate serves to protect the light-emitting side of the flexible display panel. Summary of the Invention

[0003] This disclosure aims to address at least one of the technical problems existing in the prior art by proposing a cover plate and module.

[0004] To achieve the above objectives, this disclosure provides a cover plate for use in a foldable display module. The cover plate has an unfolded state and a folded state. The cover plate includes a cover plate body, which includes at least one folding portion and multiple cover plate portions. In the unfolded state, the multiple cover plate portions are arranged along a first direction. The folding portion is connected between two adjacent cover plate portions. The folding portion is capable of bending along a bending axis. The extension direction of the bending axis intersects both the first direction and the thickness direction of the cover plate.

[0005] The cover plate portion has a first surface and a second surface arranged along the thickness direction of the cover plate, the folded portion is located between the plane where the first surface and the second surface of at least one of the cover plate portions are located, and the folded portion overlaps with the orthographic projection of the adjacent cover plate portion on the reference plane;

[0006] The reference plane is a plane perpendicular to the thickness direction of the cover plate.

[0007] In some embodiments, the folded portion has a first longitudinal section perpendicular to the bending axis, the first longitudinal section including a first side and a second side disposed opposite to each other, the first side and the second side respectively fitting into the two cover portions;

[0008] At least a portion of the first side and at least a portion of the second side are independently selected from one of the following shapes: a curve, a broken line, or a straight line intersecting the thickness direction of the cover plate.

[0009] In some embodiments, the first longitudinal section of the folded portion perpendicular to the bending axis is a centrally symmetrical figure;

[0010] And / or, the first longitudinal section of the folded portion perpendicular to the bending axis is an axisymmetric figure, and the axisymmetric figure is symmetrical about a first axis of symmetry extending along the thickness direction of the cover plate.

[0011] In some embodiments, the cover plate further includes:

[0012] A first protective layer is located on one side of the cover plate body along its thickness direction, and the elastic modulus of the first protective layer is not greater than the elastic modulus of the folded portion.

[0013] And / or, a second protective layer, the second protective layer being disposed around the cover plate body, wherein the elastic modulus of the second protective layer is not greater than the elastic modulus of the folded portion.

[0014] In some embodiments, the cover plate includes a first protective layer and a second protective layer, and at least one of the folded portion and the second protective layer is connected to the first protective layer as an integral structure.

[0015] In some embodiments, the refractive index difference between adjacent folds and cover portions is less than or equal to 0.1.

[0016] In some embodiments, the at least one fold includes a first fold and a second fold, wherein the elastic modulus of the first fold is greater than that of the second fold, and the bending radius of the first fold is greater than that of the second fold.

[0017] In some embodiments, the cover plate includes:

[0018] A first cover plate surface and a second cover plate surface, the first cover plate surface and the second cover plate surface being located on opposite sides of the cover plate in its thickness direction;

[0019] The connecting side is connected between the first cover plate surface and the second cover plate surface, and the connecting side is connected to the first cover plate surface through a first chamfered surface, and the connecting side is connected to the second cover plate surface through a second chamfered surface.

[0020] This disclosure also provides a display module, including:

[0021] Flexible display panel;

[0022] The cover plate as described in any one of the above statements is located on the light-emitting side of the flexible display panel.

[0023] In some embodiments, the folded portion includes a first flexible layer and a second flexible layer stacked sequentially along the direction close to the flexible display panel, wherein the elastic modulus of the first flexible layer is greater than that of the second flexible layer.

[0024] In some embodiments, the folded portion further includes a third flexible layer located on the side of the second flexible layer closer to the flexible display panel;

[0025] The elastic modulus of the third flexible layer is greater than that of the second flexible layer.

[0026] In some embodiments, the elastic modulus of the first flexible layer is greater than that of the third flexible layer.

[0027] In some embodiments, the thickness of the first flexible layer is greater than the thickness of the third flexible layer.

[0028] In some embodiments, the third flexible layer includes multiple third sub-flexible layers, and for two adjacent third sub-flexible layers, the elastic modulus of the one closer to the flexible display panel is not less than the elastic modulus of the one farther from the flexible display panel.

[0029] In some embodiments, the first flexible layer includes multiple first sub-flexible layers, and for two adjacent first sub-flexible layers, the elastic modulus of the one farther from the flexible display panel is not less than the elastic modulus of the one closer to the flexible display panel.

[0030] And / or, the second flexible layer includes multiple second sub-flexible layers, wherein for two adjacent second sub-flexible layers, the elastic modulus of the one closer to the first flexible layer is not less than the elastic modulus of the one closer to the third flexible layer. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the planar structure of the cover plate in the unfolded state in some embodiments of this disclosure;

[0033] Figure 2 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some embodiments of this disclosure;

[0034] Figure 3 This is a cross-sectional structural diagram of the cover plate in a folded state in some embodiments of this disclosure;

[0035] Figure 4 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0036] Figure 5 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0037] Figure 6 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0038] Figure 7 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0039] Figure 8 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0040] Figure 9 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0041] Figure 10 This is a schematic diagram of the planar structure of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0042] Figure 11 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0043] Figure 12 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0044] Figure 13 This is a schematic diagram of the planar structure of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0045] Figure 14 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure;

[0046] Figure 15 This is a cross-sectional structural diagram showing the module in its unfolded state in some embodiments of this disclosure;

[0047] Figure 16 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0048] Figure 17 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0049] Figure 18 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0050] Figure 19 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0051] Figure 20This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0052] Figure 21 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0053] Figure 22 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0054] Figure 23 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure;

[0055] Figure 24 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Detailed Implementation

[0056] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0058] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] As used herein, “parallel” and “perpendicular” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error 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, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°.

[0060] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0061] This document describes exemplary embodiments with reference to sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0062] Compared to non-foldable display devices, foldable or flexible display devices can be folded, rolled, or bent like paper, and are gradually gaining consumer attention due to their excellent portability and convenience.

[0063] However, the thickness of the cover plate is limited in order to achieve the folding function of foldable display devices. For example, in some embodiments, the cover plate of a foldable display device includes a flexible display panel and ultra-thin glass (UTG) located on the light-emitting side of the flexible display panel. For such flexible cover plates using ultra-thin glass, if the ultra-thin glass is too thick, the bending ability of the cover plate decreases, and creases or even breakage are likely to occur during folding. On the other hand, if the ultra-thin glass is too thin, the overall impact resistance of the cover plate is poor, making the flexible display panel susceptible to impact, thereby affecting the display performance.

[0064] In order to at least alleviate or solve one of the aforementioned technical problems, this disclosure provides a cover plate and a display module.

[0065] In some embodiments, this disclosure provides a cover plate 1 for use in a folding display module.

[0066] Figure 1 This is a schematic diagram of the planar structure of the cover plate in the unfolded state in some embodiments of this disclosure. Figure 2 This is a schematic cross-sectional view of the cover plate in its unfolded state in some embodiments of this disclosure, specifically along... Figure 1 A schematic diagram of the cross-sectional structure cut by the cutting line AA'. Figure 3 This is a cross-sectional structural diagram of the cover plate in a folded state in some embodiments of this disclosure.

[0067] like Figure 1 and Figure 2 As shown, the cover plate 1 of this disclosure has an unfolded state, and the cover plate 1 in the unfolded state extends along a first direction. The cover plate 1 of this embodiment includes: a cover plate body, the cover plate body including at least one folding portion 12 and a plurality of cover plate portions 11. Furthermore, in the unfolded state of the cover plate 1, the plurality of cover plate portions 11 are arranged along the first direction, and the folding portion 12 is connected between two adjacent cover plate portions 11.

[0068] like Figure 1 As shown, the folding portion 12 can be bent along the bending axis a, and the extending direction of the bending axis a intersects both the first direction and the thickness direction of the cover plate 1. The folding portion 12 includes a first folding surface 201 and a second folding surface 202 along its thickness direction. Figure 1 and Figure 3 In the illustrated embodiment, the bending shaft a passes through the center O of the first folding surface 201. It can be understood that, in the folded state of the cover plate 1, the first folding surface 201 is the inner folding surface, and the second folding surface 202 is the outer folding surface.

[0069] It should be noted that, in this embodiment, the thickness direction of the cover plate 1 refers to the thickness direction of the cover plate 1 in its flattened state. Similarly, the thickness direction of the folded portion 12 also refers to the thickness direction of the cover plate 1 in its flattened state.

[0070] like Figure 3 As shown, the cover plate 1 of this disclosure has a folded state. The folding portion 12, when bent along the bending axis a, allows the cover plate 1 to be in a folded state. In the folded state of the cover plate 1, the cover plate portions 11 on both sides of the same folding portion 12 are arranged opposite to each other. Furthermore, the folding radius of the cover plate 1 is R.

[0071] like Figure 2 As shown, the cover plate portion 11 has a first surface 101 and a second surface 102 arranged along the thickness direction of the cover plate 1, wherein the folding portion 12 is located between the plane where the first surface 101 and the second surface 102 of at least one cover plate portion 11 are located.

[0072] Specifically, in the flattened state of cover plate 1, in one example, such as Figure 2As shown, the first surface 101 of all cover plate portions 11 is located on the first plane, the second surface 102 of all cover plate portions 11 is located on the second plane, the folding portion 12 is located between the first plane and the second plane, and further, the first folding surface 201 of the folding portion 12 is also located on the first plane, and the second folding surface 202 of the folding portion 12 is also located on the second plane.

[0073] The orthographic projections of the folded portion 12 and the adjacent cover portion 11 onto the reference plane b overlap. The reference plane b is a plane perpendicular to the thickness direction of the cover plate 1. Alternatively, the reference plane b may be a plane parallel to the first surface 101.

[0074] The cover plate 1 in this embodiment is designed by splicing and combining the cover plate part 11 and the folding part 12. The cover plate part 11 and the folding part 12 can be made of appropriate materials, so that the folding part 12 can realize the foldability of the cover plate 1, while the cover plate part 11 can ensure the impact resistance of the cover plate 1.

[0075] Optionally, the cover portion 11 can be made of a rigid material. For example, the material of the cover portion 11 may include at least one of flexible glass, acrylic, etc. Flexible glass may be, for example, ultra-thin glass.

[0076] Optionally, the fold portion 12 can be made of a flexible material. For example, the material of the fold portion 12 may include at least one of acrylic, PU (Polyurethane), CPI (Colorless Polyimide), and PET (Polyethylene terephthalate). Alternatively, the material of the fold portion 12 may include a variety of flexible materials to improve impact resistance.

[0077] Optionally, the modulus of the folded portion 12 can be 10MPa to 10Gpa, thereby ensuring the bending reliability of the folded portion 12.

[0078] In this embodiment, the orthographic projections of the folded portion 12 and the adjacent cover portion 11 on the reference plane overlap. That is, the connection surface between the folded portion 12 and the adjacent cover portion 11 is not a plane extending along the thickness direction of the cover plate 1. Furthermore, it can be understood that the surface of the folded portion 12 facing the adjacent cover portion 11 and the surface of the cover portion 11 facing the adjacent folded portion 12 are not planes extending along the thickness direction of the cover plate 1. This ensures the adhesion between the adjacent cover portion 11 and the folded portion 12, thereby increasing the connection reliability between the cover portion 11 and the folded portion 12.

[0079] Wherein, the minimum width W1 of the folded part 12 in the first direction is π*R+L, where R is the bending radius of the folded part 12, and L is the sum of tolerances including connection, assembly, etc.

[0080] Optionally, the thickness H1 of the cover plate 1 can be greater than or equal to 10 μm. In order to ensure the overall impact resistance of the cover plate 1, the thickness H1 of the cover plate 1 can be greater than or equal to 50 μm. For example, H1 can be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm or 200 μm.

[0081] Optionally, the method for preparing the cover plate 1 in this embodiment includes the following steps: first, preparing a plurality of cover plate portions 11; then, applying a liquid flexible material between adjacent cover plate portions 11; and finally, after the liquid flexible material solidifies, forming a folded portion 12. The shape of the connecting surface between adjacent cover plate portions 11 and the folded portion 12 can be determined during the preparation of the cover plate portions 11, thereby ensuring that the orthographic projections of the folded portion 12 and the adjacent cover plate portions 11 on the reference plane overlap.

[0082] The present invention simplifies the preparation process of the cover plate 1, reduces the preparation difficulty of the cover plate 1, and improves the preparation efficiency of the cover plate 1.

[0083] Figure 4 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 5 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 6 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 7 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 8 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 9 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure.

[0084] In some embodiments, such as Figure 1 , Figures 4 to 9As shown, the folded portion 12 has a first longitudinal section perpendicular to the bending axis. The first longitudinal section includes a first side 203 and a second side 204 disposed opposite to each other, and the first side 203 and the second side 204 respectively abut against the two cover portions 11. At least a portion of the first side 203 and at least a portion of the second side 204 are independently selected from one of the following shapes: a straight line, a curve, or a broken line intersecting the thickness direction of the cover 1. Wherein, "independent" means that the shapes of at least a portion of the first side 203 and at least a portion of the second side 204 can be the same or different.

[0085] Among them, Figure 1 , Figures 4 to 7 In the embodiment shown, the first side 203 and the second side 204 are shaped like broken lines. Figure 8 In the illustrated embodiment, at least a portion of the first side 203 is curved, and at least a portion of the second side 204 is curved. Figure 9 In the embodiment shown, the first side 203 and the second side 204 are straight lines, and the straight lines intersect the thickness direction of the cover plate 1.

[0086] Optionally, in Figure 8 In the illustrated embodiment, the curve can be a portion of the arc length of a circle, i.e., an arc. The radius r of the arc can be between 0.02 mm and 1 mm. Furthermore, the radius r of the arc can be gradually increased. For example, in one example, the radius r of the arc gradually increases or decreases in the direction near the fold 12.

[0087] In this embodiment of the present disclosure, the shapes of the first side 203 and the second side 204 in the first longitudinal section can determine the shape of the connection surface between adjacent cover portions 11 and folded portions 12. Therefore, designing the first side 203 and the second side 204 into various shapes can improve the adhesion between adjacent cover portions 11 and folded portions 12, thereby increasing the connection reliability between adjacent cover portions 11 and folded portions 12. Furthermore, different shapes and combinations can also meet the needs of different products.

[0088] It should be noted that this disclosure provides some exemplary embodiments. The specific settings of the shapes of the first side 203 and the second side 204 in the first longitudinal section can be selected according to the actual situation, and the embodiments of this disclosure will not be listed one by one.

[0089] In some embodiments, such as Figure 1 , Figures 4 to 9 As shown, the first longitudinal section of the folded portion 12 perpendicular to the bending axis is a centrally symmetric figure, and / or the first longitudinal section of the folded portion 12 perpendicular to the bending axis is an axisymmetric figure, wherein the axisymmetric figure is symmetric about a first axis of symmetry c extending along the thickness direction of the cover plate 1.

[0090] Specifically, in Figure 1 , Figures 4 to 8 In the embodiment shown, the first longitudinal section of the folded portion 12 perpendicular to the bending axis is an axisymmetric figure symmetrical about the first axis of symmetry c.

[0091] exist Figure 9 In the embodiment shown, the first longitudinal section of the folded portion 12 perpendicular to the bending axis is a parallelogram. That is, it can be understood that the first longitudinal section of the folded portion 12 perpendicular to the bending axis is centrally symmetrical about the center P of the parallelogram.

[0092] At the same time, Figure 1 , Figures 4 to 8 In the embodiment shown, the first longitudinal section of the folded portion 12 perpendicular to the bending axis can also be a centrally symmetrical figure.

[0093] In this embodiment, the first longitudinal section of the folded portion 12 perpendicular to the bending axis is a centrally symmetrical and / or axisymmetric figure, which can ensure the reliability of the connection between adjacent folded portions 12 and cover portions 11, and at the same time ensure that the adhesion between the same folded portion 12 and two adjacent cover portions 11 is the same or close, avoiding problems such as breakage at the connection between the same folded portion 12 and different cover portions 11.

[0094] In some embodiments, the refractive index difference between adjacent fold portions 12 and cover portions 11 is less than or equal to 0.1. For example, the refractive index difference can be 0.1, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03, 0.02, 0.01, or 0. A refractive index difference of 0 between adjacent fold portions 12 and cover portions 11 indicates that adjacent fold portions 12 and cover portions 11 have the same refractive index.

[0095] In this embodiment, the refractive index difference between adjacent folded portions 12 and cover portions 11 is less than or equal to 0.1. This allows the rigid material of the cover portion 11 and the flexible material of the folded portion 12 to achieve refractive index matching, thereby eliminating the boundary light and shadow at the connection point between the cover portion 11 and the folded portion 12, i.e., eliminating the boundary light and shadow in the transition region. This ensures that the light transmission effect of the transition region is consistent with that of other regions, avoiding any impact on the light transmission effect. Specifically, in the transition region, the orthographic projections of the cover portion 11 and the folded portion 12 on the reference plane b overlap.

[0096] Figure 10 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 11 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 12 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure.

[0097] In some embodiments, such as Figures 10 to 12 As shown, the cover plate 1 further includes: a first protective layer 13 and / or a second protective layer 14. Wherein, in... Figure 10 and Figure 12 In the embodiment shown, the cover plate 1 includes a first protective layer 13, in such a way as Figure 11 and Figure 12 In the embodiment shown, the cover plate 1 includes a second protective layer 14.

[0098] Among them, such as Figure 10 and Figure 12 As shown, the first protective layer 13 is located on one side of the cover plate body along its thickness direction, and the elastic modulus of the first protective layer 13 is not greater than the elastic modulus of the folded portion 12. It can be understood that the first protective layer 13 is located on one side of the cover plate portion 11 or the folded portion 12 along the thickness direction of the cover plate, and the first protective layer 13 covers the cover plate portion 11 and the folded portion 12.

[0099] like Figure 11 and Figure 12 As shown, the second protective layer 14 is disposed around the main body of the cover plate, and the elastic modulus of the second protective layer 14 is not greater than the elastic modulus of the folded part 12.

[0100] In this embodiment, the first protective layer 13 and the second protective layer 14 can protect the cover plate portion 11 and the folded portion 12. Furthermore, the elastic modulus of the first protective layer 13 and the second protective layer 14 being no greater than the elastic modulus of the folded portion 12 can further improve the impact resistance of the cover plate.

[0101] In some embodiments, such as Figure 12 As shown, the first protective layer 13 and the second protective layer 14 are connected as a single structure.

[0102] In other embodiments, the first protective layer 13 and the cover plate portion 11 are connected as an integral structure.

[0103] In other embodiments, the first protective layer 13, the second protective layer 14, and the cover plate portion 11 are connected as a single structure.

[0104] In this embodiment of the present disclosure, at least one of the cover plate portion 11 and the second protective layer 14 is connected to the first protective layer 13 as an integral structure, which can simplify the manufacturing process of the cover plate and reduce the manufacturing difficulty of the cover plate.

[0105] Optionally, the materials of the first protective layer 13 and the second protective layer 14 may be the same as or different from the material of the folded portion 12.

[0106] For example, the materials of the first protective layer 13 and the second protective layer 14 are organic polymers.

[0107] Optionally, when preparing the first protective layer 13 and the second protective layer 14, a liquid organic polymer material can be coated onto the corresponding positions of the cover plate body. After the liquid organic polymer material solidifies, the corresponding first protective layer 13 or second protective layer 14 is obtained. The specific configuration of the first protective layer 13 and the second protective layer 14 can be selected as needed in different embodiments.

[0108] Figure 13 This is a schematic diagram of the planar structure of the cover plate in the unfolded state in some other embodiments of this disclosure. Figure 14 This is a cross-sectional structural diagram of the cover plate in the unfolded state in some other embodiments of this disclosure, specifically along... Figure 13 A schematic diagram of the cross-sectional structure cut by the middle cutting line BB'.

[0109] In some embodiments, such as Figure 13 and Figure 14 As shown, at least one folding portion 12 includes a first folding portion 121 and a second folding portion 122. Correspondingly, there are three cover portions 11. Wherein, as... Figure 10 As shown, the first folding part 121 can be bent around the first bending axis a1, and the second folding part 122 can be bent around the second bending axis a2.

[0110] And, as Figure 13 and Figure 14 As shown, the minimum width W11 of the first folded portion 121 in the first direction is W11 = π*R1 + L1, where R1 is the bending radius of the first folded portion 121 and L1 is the first tolerance corresponding to the first folded portion 121. The minimum width W12 of the second folded portion 122 in the first direction is W12 = π*R2 + L2, where R2 is the bending radius of the second folded portion 122 and L2 is the second tolerance corresponding to the first folded portion 122.

[0111] The bending radius of the first fold 12 is greater than that of the second fold 12. Furthermore, the elastic modulus of the first fold 12 is greater than that of the second fold 12.

[0112] In this embodiment, the bending radius of the first fold 12 is greater than that of the second fold 12. It is understood that the cover plate 1 in this embodiment is a three-fold product. Furthermore, the elastic modulus of the first fold 12 is greater than that of the second fold 12, which ensures the bending reliability of both the first and second folds, thus preventing creases and breakage in the first and second folds.

[0113] Optionally, the first fold 12 and the second fold 12 can be made of the same material or different materials.

[0114] In one example, the bending radius of the first fold 12 is 3 μm, and the bending radius of the first fold 12 is 1.5 μm.

[0115] Optionally, the first fold 12 has a large bending radius, and its material may include at least one of high-modulus materials such as CPI and PET. The second fold 12 has a small bending radius, and its material may include at least one of softer materials such as acrylic, polyurethane, and silicone.

[0116] Optionally, the elastic modulus of the first fold 12 can be greater than 3 GPa. The elastic modulus of the second fold 12 can be 10 MPa to 1 GPa.

[0117] In some embodiments, such as Figure 2 As shown, the cover plate 1 includes a first cover plate surface and a second cover plate surface (the first cover plate surface and the second cover plate surface are not separately shown in the figure). The first cover plate surface and the second cover plate surface are located on opposite sides of the cover plate 1 in its thickness direction.

[0118] Specifically, such as Figure 1 and Figure 2 As shown, the first cover plate surface includes a first surface 101 and a first folded surface 201. (As indicated...) Figure 2 As shown, the second cover plate surface includes a second surface 102 and a second folded surface 202.

[0119] like Figure 2 As shown, the cover plate 1 further includes a connecting side 103. The connecting side 103 is connected between the first cover plate surface and the second cover plate surface. The connecting side 103 is connected to the first cover plate surface through a first chamfered surface 104, and connected to the second cover plate surface through a second chamfered surface 105.

[0120] In this embodiment of the present disclosure, by designing a first chamfered surface 104, a connecting side surface 103, and a second chamfered surface 105 between the first cover plate surface and the second cover plate surface, the impact resistance of the cover plate 1 at the edge of the connecting side surface 103 can be increased.

[0121] Optionally, the dimensions of the first end face 103 and the second end face 104 in the thickness direction of the cover plate 1 are both H2. H2 can be H1*(1 / 4 to 3 / 4). For example, H2 can be 1 / 4*H1, 1 / 3*H1, 1 / 2*H1, 2 / 3*H1 or 3 / 4*H1.

[0122] This disclosure also provides a display module, including: a flexible display panel 2 and a cover plate 1 as described in any embodiment of this disclosure, wherein the cover plate 1 is located on the light-emitting side of the flexible display panel 2.

[0123] In this embodiment of the present disclosure, the cover plate 1 can achieve the protection of the light-emitting side of the flexible display panel 2 by combining and splicing the folding part 12 and the cover plate part 11.

[0124] Figure 15 This is a cross-sectional structural diagram showing the module in its unfolded state in some embodiments of this disclosure.

[0125] In some embodiments, such as Figure 15 As shown, the folded portion 12 includes a first flexible layer 121 and a second flexible layer 122 stacked sequentially along the direction close to the flexible display panel 2, wherein the elastic modulus of the first flexible layer 121 is greater than that of the second flexible layer 122.

[0126] In this embodiment, the first flexible layer 121 is farther from the flexible display panel 2 than the second flexible layer 122. Therefore, the first flexible layer 121 has a larger elastic modulus, which increases the extensibility of the folded portion 12. At the same time, the second flexible layer 122 has a smaller elastic modulus, which increases the bending reliability of the folded portion 12 and avoids problems such as creases caused by bending. The extensibility ensures that the folded portion 12 remains flat when transitioning from a folded state to an unfolded state.

[0127] Optionally, such as Figure 15 As shown, the thickness H3 of the first flexible layer 121 is greater than the thickness H4 of the second flexible layer 122. In this embodiment of the present disclosure, based on the fact that the elastic modulus of the first flexible layer 121 is less than the elastic modulus of the second flexible layer 122, making the thickness H3 of the first flexible layer 121 greater than the thickness H4 of the second flexible layer 122 can further increase the impact resistance of the folded portion 12.

[0128] Figure 16 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Figure 17 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Figure 18 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure.

[0129] In some embodiments, such as Figures 16 to 18 As shown, the folded portion 12 also includes a third flexible layer 123 located on the side of the second flexible layer 122 near the flexible display panel 2. The elastic modulus of the third flexible layer 123 is greater than that of the second flexible layer 122.

[0130] In this embodiment, the elastic modulus of the third flexible layer 123 is less than that of the second flexible layer 122, which can further reduce the impact from the third flexible layer 123 on the flexible display panel 2, thereby further improving the impact resistance of the folded portion 12.

[0131] Furthermore, in this embodiment, the elastic modulus of the first flexible layer 121 is greater than that of the second flexible layer 122, and the elastic modulus of the third flexible layer 123 is greater than that of the second flexible layer 122. That is, the first flexible layer 121, the second flexible layer 122, and the third flexible layer 123 form a hard-soft-hard stacked combination. This hard-soft-hard three-layer structure can further improve the impact resistance of the cover plate 1.

[0132] Optionally, the first flexible layer 121 and the third flexible layer 123 can both be materials with high modulus, such as CPI and PET, with a modulus greater than 3 GPa. The second flexible layer 122 can be a softer material, such as acrylic, polyurethane, or silicone, with a modulus of 10 MPa to 1 GPa.

[0133] It should be noted that, as Figure 17 and Figure 18 As shown, when the shape of the first side 203 and the second side 204 is a combination of curves and straight lines, or when it is a broken line, both the first side 203 and the second side 204 include inflection points connecting the curves and straight lines, or inflection points connecting the straight lines. The boundary lines of the first flexible layer 121 and the second flexible layer 122, as well as the boundary lines of the second flexible layer 122 and the third flexible layer 123, may or may not be collinear with the lines connecting the inflection points of the first side 203 and the corresponding inflection points of the second side 204.

[0134] Specifically, in Figure 17 In the illustrated embodiment, the first side 203 includes a first inflection point Q1 and a second inflection point Q2 sequentially arranged along the direction close to the flexible display panel 2. Correspondingly, the second side 204 also includes a third inflection point Q3 and a fourth inflection point Q4 sequentially arranged along the direction close to the flexible display panel 2. The first inflection point Q1 of the first side 203 corresponds to the third inflection point Q3 of the second side 204, and the second inflection point Q2 of the first side 203 corresponds to the fourth inflection point Q4 of the second side 204. The line connecting the first inflection point Q1 of the first side 203 and the third inflection point Q3 of the second side 204 is the boundary line between the first flexible layer 121 and the second flexible layer 122. The line connecting the second inflection point Q2 of the first side 203 and the fourth inflection point Q4 of the second side 204 is the boundary line between the second flexible layer 122 and the third flexible layer 123.

[0135] In such Figure 15 In the illustrated embodiment, the line connecting the first inflection point Q1 of the first side 203 and the third inflection point Q3 of the second side 204 is not collinear with the boundary line between the first flexible layer 121 and the second flexible layer 122. The line connecting the second inflection point Q2 of the first side 203 and the fourth inflection point Q4 of the second side 204 is not collinear with the boundary line between the second flexible layer 122 and the third flexible layer 123.

[0136] In this embodiment of the present disclosure, the shapes of the first side 203 and the second side 204, as well as the thicknesses of the first flexible layer, the second flexible layer, and the third flexible layer, can be set separately.

[0137] In actual manufacturing, the line connecting the first inflection point Q1 of the first side 203 and the third inflection point Q3 of the second side 204 can be collinear with the boundary line between the first flexible layer 121 and the second flexible layer 122, and the line connecting the second inflection point Q2 of the first side 203 and the fourth inflection point Q4 of the second side 204 can be collinear with the boundary line between the second flexible layer 122 and the third flexible layer 123. In this case, the thickness of the first flexible layer 121, the second flexible layer 122 and the third flexible layer 123 can be set by setting the shape of the first side 203 and the second side 204, which helps to reduce the manufacturing difficulty of the cover plate 1 and makes it easier to control the overall impact resistance of the cover plate 1.

[0138] In some embodiments, such as Figure 17 and Figure 18 As shown, the width W1 of the second flexible layer 122 is the minimum width W1 of the folded portion 12 in the first direction.

[0139] like Figure 17 and Figure 18 As shown, the orthographic projection of the first flexible layer 121 on the flexible display panel 2 extends beyond the orthographic projection of the second flexible layer 122 on the flexible display panel 2 on both sides of the first direction, and the width W2 of the extended portion on each side is greater than or equal to the thickness H1 of the cover plate 1.

[0140] It should be noted that, for ease of understanding of the structure of the cover plate and the display module, the dimension representation of the cover plate thickness H1 in the accompanying drawings has been adjusted accordingly. Therefore, those skilled in the art should understand that in the actual cover plate structure, the thickness H1 of the cover plate 1 is relatively small, thus allowing W2 to be greater than or equal to H1, thereby increasing the reliability of the connection between the cover plate portion 11 and the folding portion 12.

[0141] In some embodiments, the elastic modulus of the first flexible layer 121 is less than the elastic modulus of the third flexible layer 123.

[0142] In this embodiment, the first flexible layer 121 has a low elastic modulus, which can mitigate the impact on the folded portion 12, thereby improving the impact resistance of the folded portion 12. Furthermore, in this embodiment, the second flexible layer 122 has the highest elastic modulus, which can ensure the ductility of the folded portion 12.

[0143] In some embodiments, the thickness H3 of the first flexible layer 121 is greater than the thickness H5 of the third flexible layer 123.

[0144] In this embodiment, the first flexible layer 121 is thicker, which can alleviate the impact on the folded portion 12, thereby improving the impact resistance of the folded portion 12.

[0145] Optionally, in Figure 17 In the illustrated embodiment, the thickness H3 of the first flexible layer 121 is greater than the thickness H4 of the second flexible layer 122. The thickness H4 of the second flexible layer 122 is greater than the thickness H5 of the third flexible layer 123.

[0146] Optionally, in Figure 18 In the embodiment shown, the thickness H3 of the first flexible layer 121 and the thickness H5 of the third flexible layer are both less than the thickness H4 of the second flexible layer.

[0147] Optionally, the thickness H4 of the second flexible layer 122 can be (1 / 5 to 1 / 2) * H1.

[0148] In one example, the total thickness H1 of the cover plate 1 is 200 μm, wherein the thickness H3 of the first flexible layer 121 is 80 μm, the thickness H4 of the second flexible layer 122 is 100 μm, and the thickness H5 of the third flexible layer 123 is 20 μm.

[0149] Figure 19 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Figure 20 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Figure 21 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Figure 22 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure. Figure 23 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure.

[0150] In some embodiments, such as Figures 19 to 21 As shown, the first flexible layer 121 includes multiple first sub-flexible layers 1211. For any two adjacent first sub-flexible layers 1211, the elastic modulus of the layer farther from the flexible display panel 2 is not less than the elastic modulus of the layer closer to the flexible display panel 2. That is, the farther the first sub-flexible layer 1211 is from the flexible display panel 2, the greater its rigidity.

[0151] In this embodiment of the present disclosure, by setting multiple first sub-flexible layers 1211 with smaller elastic moduli, and setting the elastic moduli of the first sub-flexible layers 1211 according to their distance from the flexible display panel 2, the impact on the folded portion 12 can be gradually buffered by the multiple first sub-flexible layers 1211. Therefore, this embodiment of the present disclosure can improve the impact resistance of the folded portion 12.

[0152] In some embodiments, such as Figure 21 and Figure 23 As shown, the second flexible layer 122 includes multiple second sub-flexible layers 1221. Specifically, for any two adjacent second sub-flexible layers 1221, the elastic modulus of the one closer to the first flexible layer 121 is not less than the elastic modulus of the one closer to the third flexible layer 123. In other words, the elastic modulus of the second sub-flexible layer 1221 farther from the flexible display panel 2 is not less than the elastic modulus of the second sub-flexible layer 1221 closer to the flexible display panel 2.

[0153] In this embodiment of the disclosure, the bending reliability of the folded portion 12 can be improved by providing multiple second sub-flexible layers 1221 with large elastic modulus.

[0154] In some embodiments, such as Figure 20 and Figure 22 As shown, the third flexible layer 123 includes multiple third sub-flexible layers 1231. Specifically, for any two adjacent third sub-flexible layers 1231, the elastic modulus of the third flexible layer 123 closer to the flexible display panel 2 is not less than the elastic modulus of the third flexible layer 123 farther from the flexible display panel 2. That is, the closer the third sub-flexible layer 1231 is to the flexible display panel 2, the greater its rigidity.

[0155] In this embodiment of the present disclosure, by setting multiple third sub-flexible layers 1231 with smaller elastic moduli, and setting the elastic moduli of the third sub-flexible layers 1231 according to their distance from the flexible display panel 2, the impacts on the folded portion 12 can be gradually buffered by the multiple third sub-flexible layers 1231. Therefore, this embodiment of the present disclosure can improve the impact resistance of the folded portion 12.

[0156] It should be noted that this disclosure provides some exemplary embodiments. Whether the first sub-flexible layer 1211, the second sub-flexible layer 1221 and the third sub-flexible layer 1231 are set, as well as the specific number of layers, can be selected according to the actual situation. This disclosure will not list them one by one.

[0157] Figure 24 This is a cross-sectional structural diagram showing the module in its unfolded state in some other embodiments of this disclosure.

[0158] In some embodiments, such as Figure 24As shown, the first protective layer 13 is located on the side of the cover plate 1 away from the flexible display panel 2. The second protective layer 14 is located on the same side of the flexible display panel 2 as the cover plate portion 11 and the folded portion 12, and the second protective layer 14 can be connected to the cover plate portion 11, the folded portion 12, and the flexible display panel 2, respectively. Specifically, the second protective layer 14 is connected to the side surfaces of the cover plate portion 11 and the folded portion 12, respectively, and is connected to the surface of the flexible display panel 2 facing the cover plate 1. Therefore, the second protective layer 14 can increase the connection reliability between the cover plate 1 and the flexible display panel 2.

[0159] In this embodiment, the first protective layer 13 can increase the impact resistance of the flexible display panel 2 on the light-emitting side, and the second protective layer 14 can increase the impact resistance of the edges of the cover plate 1.

[0160] In some embodiments, the display module further includes an optically clear adhesive layer (OCA) located between the flexible display panel 2 and the cover plate 1. The flexible display panel 2 and the cover plate 1 are bonded together by the optically clear adhesive layer.

[0161] In some embodiments, the flexible display panel 2 includes a flexible substrate, a driving circuit layer, a light-emitting structure layer, an encapsulation layer, and a touch layer arranged sequentially in the direction close to the cover plate 1.

[0162] The material of the flexible substrate may include PI.

[0163] The light-emitting structure layer includes light-emitting devices, which can be organic light-emitting diodes (OLEDs) or micro light-emitting diodes (Micro LEDs).

[0164] The encapsulation layer comprises a first inorganic layer, an organic layer, and a second inorganic layer stacked sequentially. For example, the encapsulation layer comprises a first inorganic layer, an organic layer, and a second inorganic layer stacked sequentially in a direction away from the flexible substrate. The materials of the first and second inorganic layers can both include at least one of SiN and SiO. For example, the material of the first inorganic layer includes SiON, and the material of the second inorganic layer includes SiN. The material of the organic layer can include acrylic.

[0165] Optionally, the light-emitting structure layer may also include a protective film located on the side of the light-emitting device away from the cover plate 1.

[0166] Optionally, the light-emitting structure layer may also include a polarizing plate or color filter layer located near the cover plate 1 of the light-emitting device.

[0167] In some embodiments, the method for manufacturing the display module disclosed herein includes the following steps:

[0168] Step S1: Provide a display motherboard, which includes multiple first product areas, each product area including a flexible display panel 2. Adjacent first product areas are separated by a first cutting line.

[0169] Step S2: Prepare a cover plate motherboard and adhere it to the light-emitting side of the display motherboard using optical adhesive. The cover plate motherboard includes multiple second product areas, each second product area including a cover plate 1 corresponding to the flexible display panel 2. Adjacent second product areas are separated by a second cutting line, and the second cutting line corresponds to the first cutting line.

[0170] The preparation process of the cover plate mother plate includes: preparing multiple cover plate parts 11 using a rigid material, arranging the cover plate parts 11 according to the position setting, coating the cover plate parts 11 with a liquid flexible material, and obtaining the cover plate mother plate after the liquid flexible material solidifies.

[0171] Step S3: Cut along the first or second cutting line to obtain the display module.

[0172] In other embodiments, the method for manufacturing the display module of this disclosure includes the following steps:

[0173] Step S01: Provide a flexible display panel 2.

[0174] Step S02: Prepare cover plate 1 and bond cover plate 1 to the light-emitting side of flexible display motherboard using optical adhesive layer.

[0175] The preparation process of the cover plate 1 includes: preparing the cover plate part 11 using a rigid material, coating the cover plate part 11 with a liquid flexible material, and obtaining the cover plate 1 after the liquid flexible material solidifies.

[0176] In the above preparation process, the cutting process can be carried out using laser cutting, wherein the laser can be selected as a UV pico laser.

[0177] This disclosure also provides a display device, including the display module described in any of the embodiments of this disclosure.

[0178] In summary, this disclosure presents a foldable cover plate composed of a cover plate portion and a folding portion. The cover plate portion and the folding portion can be designed by splicing different materials to achieve the foldability of the cover plate, while also improving the overall impact resistance of the display module.

[0179] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A cover plate for use in a folding display module, characterized in that, The cover plate has an unfolded state and a folded state. The cover plate includes: a cover plate body, the cover plate body including at least one folding part and multiple cover plate parts. In the unfolded state, the multiple cover plate parts are arranged along a first direction. The folding part is connected between two adjacent cover plate parts. The folding part can be bent along a bending axis. The extension direction of the bending axis intersects both the first direction and the thickness direction of the cover plate. The cover plate portion has a first surface and a second surface arranged along the thickness direction of the cover plate, the folded portion is located between the plane where the first surface and the second surface of at least one of the cover plate portions are located, and the folded portion overlaps with the orthographic projection of the adjacent cover plate portion on the reference plane; The reference plane is a plane perpendicular to the thickness direction of the cover plate.

2. The cover plate according to claim 1, characterized in that, The folded portion has a first longitudinal section perpendicular to the bending axis. The first longitudinal section includes a first side and a second side disposed opposite to each other. The first side and the second side are respectively attached to the two cover portions. At least a portion of the first side and at least a portion of the second side are independently selected from one of the following shapes: a curve, a broken line, or a straight line intersecting the thickness direction of the cover plate.

3. The cover plate according to claim 2, characterized in that, The first longitudinal section of the folded part, perpendicular to the bending axis, is a centrally symmetrical figure. And / or, the first longitudinal section of the folded portion perpendicular to the bending axis is an axisymmetric figure, and the axisymmetric figure is symmetrical about a first axis of symmetry extending along the thickness direction of the cover plate.

4. The cover plate according to any one of claims 1 to 3, characterized in that, The cover plate also includes: A first protective layer is located on one side of the cover plate body along its thickness direction, and the elastic modulus of the first protective layer is not greater than the elastic modulus of the folded portion. And / or, a second protective layer, the second protective layer being disposed around the cover plate body, wherein the elastic modulus of the second protective layer is not greater than the elastic modulus of the folded portion.

5. The cover plate according to claim 4, characterized in that, The cover plate includes a first protective layer and a second protective layer, and at least one of the folded portion and the second protective layer is connected to the first protective layer to form an integral structure.

6. The cover plate according to any one of claims 1 to 3, characterized in that, The refractive index difference between adjacent folds and cover plates is less than or equal to 0.

1.

7. The cover plate according to any one of claims 1 to 3, characterized in that, The at least one fold includes a first fold and a second fold, wherein the elastic modulus of the first fold is greater than that of the second fold, and the bending radius of the first fold is greater than that of the second fold.

8. The cover plate according to any one of claims 1 to 3, characterized in that, The cover plate includes: A first cover plate surface and a second cover plate surface, the first cover plate surface and the second cover plate surface being located on opposite sides of the cover plate in its thickness direction; The connecting side is connected between the first cover plate surface and the second cover plate surface, and the connecting side is connected to the first cover plate surface through a first chamfered surface, and the connecting side is connected to the second cover plate surface through a second chamfered surface.

9. A display module, characterized in that, include: Flexible display panel; The cover plate as described in any one of claims 1 to 8, wherein the cover plate is located on the light-emitting side of the flexible display panel.

10. The display module according to claim 9, characterized in that, The folded portion includes a first flexible layer and a second flexible layer stacked sequentially along the direction close to the flexible display panel, wherein the elastic modulus of the first flexible layer is greater than that of the second flexible layer.

11. The display module according to claim 10, characterized in that, The folded portion also includes a third flexible layer located on the side of the second flexible layer closer to the flexible display panel; The elastic modulus of the third flexible layer is greater than that of the second flexible layer.

12. The display module according to claim 10, characterized in that, The elastic modulus of the first flexible layer is greater than that of the third flexible layer.

13. The display module according to claim 10, characterized in that, The thickness of the first flexible layer is greater than the thickness of the third flexible layer.

14. The display module according to claim 10, characterized in that, The third flexible layer includes multiple third sub-flexible layers, and for any two adjacent third sub-flexible layers, the elastic modulus of the one closer to the flexible display panel is not less than the elastic modulus of the one farther from the flexible display panel.

15. The display module according to any one of claims 10 to 14, characterized in that, The first flexible layer includes multiple first sub-flexible layers. For two adjacent first sub-flexible layers, the elastic modulus of the one farther from the flexible display panel is not less than the elastic modulus of the one closer to the flexible display panel. And / or, the second flexible layer includes multiple second sub-flexible layers, wherein for two adjacent second sub-flexible layers, the elastic modulus of the one closer to the first flexible layer is not less than the elastic modulus of the one closer to the third flexible layer.

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