Display module and display device

Abstract

The utility model discloses a display module and a display device, the display module comprises a display panel, the display panel is provided with at least one bending part and at least two non-bending parts, and every two adjacent non-bending parts are connected through one bending part; wherein the bending part comprises a first bending area, two connecting areas and two second bending areas, the two connecting areas are connected to the two sides of the first bending area respectively, the side, away from the first bending area, of each connecting area is connected with one second bending area, and the sides, away from the connecting areas, of the second bending areas are connected with the non-bending part; when the display panel is in a bent state, the curvature center of the first bent area and the curvature center of the second bent area are located on the two sides of the display panel respectively. The display module further comprises a cover plate located on the display side of the display panel, and the thickness of the part, corresponding to the first bending area and the second bending area, of the cover plate is smaller than that of the part, corresponding to the connecting area, of the cover plate.

Description

Technical Field

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

[0002] With the development of display technology, foldable display devices have become the focus of attention in the industry. A foldable display device is a display device with a folding function, which can be folded under the action of external force and can also be restored to a flat state under the action of external force. Utility Model Content

[0003] On the one hand, a display module is provided. The display module includes a display panel and a cover plate. The display panel has at least one bending portion and at least two non-bending portions, and two adjacent non-bending portions are connected by one of the bending portions. The bending portion includes a first bending area, two connecting areas and two second bending areas, and the two connecting areas are respectively connected to the two sides of the first bending area, and the side of each connecting area away from the first bending area is connected to one of the second bending areas, and the side of the second bending area away from the connecting area is connected to the non-bending portion; when the display panel is in a bending state, the center of curvature of the first bending area and the center of curvature of the second bending area are respectively located on both sides of the display panel. The cover plate is located on the display side of the display panel, and the thickness of the cover plate corresponding to the first bending area and the second bending area is less than the thickness of the cover plate corresponding to the connecting area.

[0004] In some embodiments, the cover plate includes a first surface and a second surface opposite to each other, the first surface is farther away from the display panel than the second surface; in a portion of the cover plate corresponding to the first bending zone, the first surface is recessed toward the second surface to form a groove; and / or, in a portion of the cover plate corresponding to the first bending zone, the second surface is recessed toward the first surface to form a groove.

[0005] In some embodiments, the cover plate includes a first surface and a second surface opposite to each other, the first surface is farther away from the display panel than the second surface; in a portion of the cover plate corresponding to the second bending zone, the first surface is recessed toward the second surface to form a groove; and / or, in a portion of the cover plate corresponding to the second bending zone, the second surface is recessed toward the first surface to form a groove.

[0006] In some embodiments, the opening of the groove gradually increases along the thickness direction of the cover plate and in the direction away from the bisector of the cover plate; wherein the bisector is parallel to the plane where the cover plate is located, and the maximum thickness of the parts of the cover plate located on opposite sides of the bisector are equal.

[0007] In some embodiments, the ratio of the thickness of the cover plate corresponding to the second bending zone to the thickness of the cover plate corresponding to the connecting zone is greater than or equal to 0.03 and less than 1; and / or the ratio of the thickness of the cover plate corresponding to the first bending zone to the thickness of the cover plate corresponding to the connecting zone is greater than or equal to 0.03 and less than 1.

[0008] In some embodiments, a thickness of a portion of the cover plate corresponding to the second bending zone is less than or equal to 45 μm.

[0009] In some embodiments, a thickness of a portion of the cover plate corresponding to the first bending zone is less than or equal to 35 μm.

[0010] In some embodiments, the display module includes a display area and a non-display area located around the display area, and the display module also includes: a covering layer located on a side of the cover plate away from the display panel; a shading pattern layer located on a side of the covering layer close to the display panel, the shading pattern layer is located in the non-display area and is arranged around the display area; a first glue layer located between the shading pattern layer and the cover plate; a portion of the first glue layer is filled in the groove.

[0011] In some embodiments, the display module includes a display area and a non-display area located around the display area, and the display module also includes: a covering layer located on a side of the cover plate away from the display panel; a first glue layer located between the covering layer and the cover plate; a portion of the first glue layer is filled in the groove; and a shading pattern layer located on a side of the cover plate close to the display panel, the shading pattern layer being located in the non-display area and arranged around the display area.

[0012] In some embodiments, the display module further includes: an anti-fouling layer located between the cover plate and the first adhesive layer, and the first adhesive layer is peelable relative to the anti-fouling layer so that the cover layer is replaceable.

[0013] In some embodiments, the display module further includes: a second adhesive layer located between the cover plate and the display panel; a portion of the second adhesive layer is filled in the groove.

[0014] In some embodiments, the display module further includes: a first buffer layer located between the cover plate and the display panel, a portion of the first buffer layer filling the groove; an edge of the first buffer layer extending out from an edge of the cover plate; a second buffer layer located on a side of the cover plate away from the display panel, the second buffer layer covering a surface of the cover plate away from the display panel and a side of the cover plate, and the second buffer layer abuts against an edge of the first buffer layer.

[0015] In some embodiments, the display module includes a display area and a non-display area located around the display area, and the display module also includes: a shading pattern layer located on the side of the first buffer layer close to the display panel, the shading pattern layer is located in the non-display area and is arranged around the display area; the shading pattern layer is located within the range of the first buffer layer.

[0016] In some embodiments, the material of the second buffer layer includes a hydrophobic and oleophobic material.

[0017] In some embodiments, the display module includes a display area and a non-display area located around the display area, and the display module also includes: a third buffer layer located on a side of the second buffer layer away from the first buffer layer; a shading pattern layer located between the third buffer layer and the second buffer layer, the shading pattern layer being located in the non-display area and arranged around the display area.

[0018] In some embodiments, the material of the third buffer layer includes a hydrophobic and oleophobic material; and / or, the material of the third buffer layer includes a hardening coating material.

[0019] In some embodiments, the display module further includes: a support member located on a non-display side of the display panel;

[0020] The support member includes a first patterned area, the first patterned area corresponds to the first bending area, and the size of the first patterned area along the first direction is greater than or equal to the size of the first bending area along the first direction; the first patterned area is provided with at least one hole and / or at least one groove; and / or, the support member includes a second patterned area, the second patterned area corresponds to the second bending area, and the size of the second patterned area along the first direction is greater than or equal to the size of the second bending area along the first direction; the second patterned area is provided with at least one hole and / or at least one groove; wherein, the first direction is the arrangement direction of the at least one bending portion and the at least two non-bending portions.

[0021] In some embodiments, the edge of the cover plate exceeds the edge of the display panel; the display module also includes: a middle frame, the middle frame is installed at the edge of the cover plate, and a step is provided on the side of the middle frame close to the cover plate, and one end of the cover plate close to the middle frame is overlapped at the step.

[0022] In some embodiments, the display panel includes: a substrate, and a thickness of a portion of the substrate corresponding to the first bending region and the second bending region is smaller than a thickness of a portion of the substrate corresponding to the non-bending portion.

[0023] In another aspect, a display device is provided, comprising: a display module as described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. 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 products involved in the embodiments of the present disclosure, the actual process of the method, etc.

[0025] Figure 1 is a structural diagram of a display device according to some embodiments;

[0026] Figure 2 is a structural diagram of a display module according to some embodiments;

[0027] Figure 3 is a structural diagram of a display panel according to some embodiments;

[0028] Figure 4 is a partial enlarged view of a display device according to some embodiments;

[0029] Figure 5 A curve diagram showing the variation of the stress of a cover plate under simulation with respect to position according to some embodiments;

[0030] Figure 6 is a structural diagram of another display module according to some embodiments;

[0031] Figure 7 is a structural diagram of a cover plate according to some embodiments;

[0032] Figure 8 is a structural diagram of another cover plate according to some embodiments;

[0033] Fig. 9 is a structural diagram of another cover plate according to some embodiments;

[0034] Fig.10 is a structural diagram of another cover plate according to some embodiments;

[0035] Fig.11 is a structural diagram of another cover plate according to some embodiments;

[0036] Fig.12 is a structural diagram of another cover plate according to some embodiments;

[0037] Fig.13is a structural diagram of another cover plate according to some embodiments;

[0038] Fig.14 is a structural diagram of another cover plate according to some embodiments;

[0039] Fig.15 is a graph of thickness measurements of a portion of the cover plate corresponding to the first bending zone or the second bending zone according to some embodiments;

[0040] Fig.16 is a structural diagram of another display module according to some embodiments;

[0041] Fig.17 is a structural diagram of another display module according to some embodiments;

[0042] Fig.18 is a structural diagram of another display module according to some embodiments;

[0043] Fig.19 is a structural diagram of another display module according to some embodiments;

[0044] Fig. 20 is a structural diagram of a display panel according to some embodiments;

[0045] Fig.21 is a structural diagram of yet another display panel according to some embodiments. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] “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.

[0051] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0052] 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.

[0053] 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.

[0054] Some embodiments of the present disclosure provide a display device, which can be any display device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or text. More specifically, it is expected that the display device of the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controls and / or displays, displays of camera views (e.g., displays of rear-view cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0055] Figure 1 FIG. 1 is a structural diagram of a display device according to some embodiments. Figure 1 As shown, the display device 2000 includes a display module 100 .

[0056] Exemplarily, the display device 2000 further includes a frame, a display driver IC (Integrated Circuit), and other electronic components.

[0057] like Figure 2 As shown, some embodiments of the present disclosure provide a display module 100, which can be applied to the above-mentioned display device 2000. Of course, the display module 100 can also be applied to other display devices, and the present disclosure does not limit this.

[0058] In some embodiments, Figure 2 As shown, the display module 100 includes a display panel 1 and a cover plate 2 .

[0059] Exemplarily, the display panel 1 may be an OLED (Organic Light Emitting Diode) display panel, a QLED (Quantum Dot Light Emitting Diodes) display panel, etc. The embodiments of the present disclosure do not specifically limit this. For example, the display panel 1 in the embodiments of the present disclosure is an OLED display panel.

[0060] Exemplarily, the display panel 1 may be a flexible folding display panel. A flexible folding display panel is a display panel with a folding function, which can be folded under the action of an external force, and can also be restored to a flat state under the action of an external force.

[0061] In addition, the flexible folding display panel can be an outward folding display panel or an inward folding display panel, and the embodiments of the present disclosure do not limit this. Outward folding means that when the flexible folding display panel is in a folded state, the display side faces outward, so as to provide convenient services to customers. Inward folding means that when the flexible folding display panel is in a folded state, the display side faces inward, which can well avoid the occurrence of defects such as scratches on the flexible folding display panel. In the embodiments of the present disclosure, the flexible folding display panel is an inward folding display panel for exemplary description.

[0062] Specifically, Figure 3 As shown, the display panel 1 has at least one bending portion 10 and at least two non-bending portions 11 , and two adjacent non-bending portions 11 are connected via a bending portion 10 .

[0063] Among them, Figure 4 As shown, Figure 4 It is a partial enlarged view of the display device 2000. The bending portion 10 of the display panel 1 includes a first bending area 101, two connecting areas 103 and two second bending areas 102. The two connecting areas 103 are respectively connected to the two sides of the first bending area 101. The side of each connecting area 103 away from the first bending area 101 is connected to a second bending area 102, and the side of the second bending area 102 away from the connecting area 103 is connected to the non-bending portion 11. When the display panel 1 is in a bent state, the curvature center of the first bending area 101 and the curvature center of the second bending area 102 are respectively located on the two sides of the display panel 1.

[0064] In some examples, such as Figure 4As shown, the display device 2000 further includes a folding mechanism 200, on which the display panel 1 is disposed, and the folding mechanism 200 is used to drive the display panel 1 to be relatively folded or unfolded. When the display panel 1 is relatively folded, the display panel 1 can be located in the folding mechanism 200, for example, and the folding mechanism 200 can provide protection for the display panel 1.

[0065] Exemplarily, when the display panel 1 is an inward-folding display panel, the folding mechanism 200 may be located on the non-display side of the display panel 1 .

[0066] It should be noted that the above “the center of curvature of the first bending zone 101 and the center of curvature of the second bending zone 102 are respectively located on both sides of the display panel 1” means that the first bending zone 101 and the second bending zone 102 have different bending directions. For example, the first bending zone 101 bends in a direction close to the folding mechanism 200, and the second bending zone 102 bends in a direction away from the folding mechanism 200. For another example, the first bending zone 101 bends in a direction away from the folding mechanism 200, and the second bending zone 102 bends in a direction close to the folding mechanism 200.

[0067] like Figure 4 As shown, when the display panel 1 is relatively folded, the first bending area 101 and the two second bending areas 102 are in a bent state, and the two connecting areas 103 are in a straight state. Specifically, the first bending area 101 is bent in a direction away from the folding mechanism 200, and the second bending area 102 is bent in a direction close to the folding mechanism 200, so that the bending portion 10 is bent in a water droplet profile.

[0068] When the display panel 1 is relatively folded, the connection area 103 has a certain inclination angle. For example, an extension line of the connection area 103 and an extension line of the non-bending portion 11 have an angle.

[0069] like Figure 2 As shown, the cover plate 2 is located on the display side of the display panel 1. As the surface structure of the display module 100, the cover plate 2 can not only play a certain supporting role, but also protect the display panel 1 below it, prevent impurities from entering the display panel 1, and improve the drop resistance and impact protection capabilities of the display panel 1, so that the surface of the display panel 1 is not easily scratched or bruised. Among them, the side of the display panel 1 used to display the image is the display side of the display panel 1, and the side facing away from the display side of the display panel 1 is the non-display side of the display panel 1.

[0070] Exemplarily, the cover plate 2 is made of a flexible material with a certain hardness, such as UTG (Ultra Thin Glass), transparent PET (Polyethylene Terephthalate) or transparent PI (Polyimide).

[0071] For example, the cover plate is ultra-thin glass. The ultra-thin glass is transparent glass with a certain degree of flexibility, so that the display panel 1 can be bent.

[0072] When the flexible foldable display panel is an inward foldable display panel, the display side of the display panel 1 faces inward. At this time, when the flexible foldable display panel is in a relatively folded state, the display panel 1 is located on the outside and the cover plate 2 is located on the inside of the display panel 1. That is, the cover plate 2 is wrapped by the display panel 1.

[0073] Specifically, when the flexible folding display panel is in a relatively folded state, the first bending zone 101 bends inward, for example, the first bending zone 101 bends in an arc shape and bulges toward the side away from the cover plate 2, and correspondingly, the cover plate 2 corresponds to the portion in the first bending zone 101 bends in an arc shape and bulges toward the side close to the display panel 1; the second bending zone 102 bends outward, for example, the second bending zone 102 bends in an arc shape and bulges toward the side close to the cover plate 2, and correspondingly, the cover plate 2 corresponds to the portion in the second bending zone 102 bends in an arc shape and bulges toward the side away from the display panel 1.

[0074] Among them, the orthographic projection of the part of the cover plate 2 corresponding to the first bending zone 101 on the display panel 1 can overlap with the first bending zone 101; the orthographic projection of the part of the cover plate 2 corresponding to the second bending zone 102 on the display panel 1 can overlap with the second bending zone 102.

[0075] like Figure 5 As shown, Figure 5 A curve of the force variation of the cover plate 2 with position is extracted from the whole machine simulation. Among them, the ordinate is Pressure Stress. When the first bending zone 101 is bent toward the display side, the surface of the cover plate 2 corresponding to the first bending zone 101 is subject to tensile stress on the side close to the display panel 1, and the surface of the cover plate 2 away from the display panel 1 is subject to compressive stress; when the second bending zone 102 is bent toward the non-display side, the surface of the cover plate 2 corresponding to the second bending zone 102 is subject to compressive stress on the side close to the display panel 1, and the surface of the cover plate 2 away from the display panel 1 is subject to tensile stress; the portion of the cover plate 2 corresponding to the connection zone 103 is not subjected to stress.

[0076] It is understandable that when the display panel 1 is relatively folded, the cover plate 2 may be broken due to the stress, thereby affecting the display quality of the display panel 1 .

[0077] Based on this, in the embodiment of the present disclosure, the cover plate 2 is improved, such as Figure 6 As shown, the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102 is smaller than the thickness of the portion of the cover plate 2 corresponding to the connecting zone 103 .

[0078] Exemplarily, the overall thickness of the cover plate 2 is in the range of 30 μm to 300 μm.

[0079] Optionally, the overall thickness of the cover plate 2 is in the range of 50 μm to 200 μm.

[0080] Furthermore, the overall thickness of the cover plate 2 is in the range of 80 μm to 150 μm.

[0081] For example, the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 is 30 μm, and the thickness of the portion of the cover plate 2 corresponding to the connection zone 103 is 250 μm. For another example, the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102 is 50 μm, and the thickness of the portion of the cover plate 2 corresponding to the connection zone 103 is 300 μm.

[0082] Illustratively, the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 may be equal to or unequal to the thickness of the portion of the second bending zone 102 , and the embodiments of the present disclosure are not limited to this.

[0083] In addition, the thickness of the portion of the cover plate 2 corresponding to the non-bending portion 11 may be equal to or different from the thickness of the portion of the cover plate 2 corresponding to the connecting area 103. Figure 6 As shown, the thickness of the portion of the cover plate 2 corresponding to the non-bending portion 11 is equal to the thickness of the portion of the cover plate 2 corresponding to the connecting area 103. Thus, the impact resistance of the cover plate 2 can be improved.

[0084] The calculation formula of the stress on the cover plate 2 in the bent state is as follows:

[0085]

[0086] Wherein, σ is the stress on the cover plate 2 , E is the elastic modulus of the cover plate 2 , t is the thickness of the cover plate 2 , and R is the bending radius of the cover plate 2 .

[0087] It can be seen from formula 1 that when the elastic modulus of the cover plate 2 and the bending radius of the cover plate 2 are constant, the stress on the cover plate 2 is proportional to the thickness of the cover plate 2. That is, the greater the thickness of the cover plate 2, the greater the stress on the cover plate 2; the smaller the thickness of the cover plate 2, the smaller the stress on the cover plate 2.

[0088] It is understandable that the smaller the stress on the cover plate 2 is, the lower the risk of the cover plate 2 being broken is. Conversely, the smaller the thickness of the cover plate 2 is, the lower the impact resistance of the corresponding display module 100 is.

[0089] Exemplarily, the elastic modulus of the cover plate 2 ranges from 1MPa to 200GPa. For example, the elastic modulus of the cover plate 2 may be: 1MPa, 500MPa, 10GPa, 150GPa, 200GPa, etc. The larger the elastic modulus of the cover plate 2, the stronger its impact resistance and the less likely it is to bend. The elastic modulus of the cover plate 2 ranges from 1MPa to 200Gpa, which can avoid the problem that the elastic modulus of the cover plate 2 is too large, resulting in the thermal cover plate 2 being difficult to bend; and the problem that the modulus of the cover plate 2 is too small, resulting in the poor impact resistance of the cover plate 2.

[0090] In the present embodiment, the cover plate 2 is designed to be thinner by thinning the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102. On the one hand, the portion of the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102 can have a smaller thickness, so that the ultra-thin design of the portion of the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102 is realized. When the cover plate 2 is bent, the stress on the portion of the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102 can be reduced, which can not only reduce the risk of the portion of the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102 being broken, but also improve the cover plate 2 corresponding to the first bending zone 101 and the second bending zone 102. The bending fatigue resistance of the first bending zone 101 and the second bending zone 102 avoids creases after multiple bending, thereby effectively improving the bendability of the cover plate 2; on the other hand, the portion of the cover plate 2 corresponding to the connection zone 103 and the non-bending portion 11 may have a larger thickness, thereby ensuring the pressure resistance of the portion of the cover plate 2 corresponding to the connection zone 103 and the non-bending portion 11. Under external force impact, the risk of the portion of the cover plate 2 corresponding to the connection zone 103 and the non-bending portion 11 being broken due to external force impact is reduced, thereby improving the impact resistance and scratch resistance of the display module 100, thereby extending the life of the display module 100 and ensuring the display effect of the display module 100.

[0091] In some embodiments, Figure 6 As shown, the cover plate 2 includes a first surface a1 and a second surface a2 opposite to each other, the first surface a1 is farther away from the display panel 1 than the second surface a2; in the portion of the cover plate 2 corresponding to the first bending zone 101, the first surface a1 is recessed toward the second surface a2 to form a groove 20; and / or, in the portion of the cover plate 2 corresponding to the first bending zone 101, the second surface a2 is recessed toward the first surface a1 to form a groove 20.

[0092] It should be noted that the above “in the portion of the cover plate 2 corresponding to the first bending zone 101, the first surface a1 is recessed toward the second surface a2 to form the groove 20; and / or, in the portion of the cover plate 2 corresponding to the first bending zone 101, the second surface a2 is recessed toward the first surface a1 to form the groove 20” means that, in some examples, in the portion of the cover plate 2 corresponding to the first bending zone 101, the first surface a1 is recessed toward the second surface a2 to form the groove 20, such as Figure 7 to Figure 10 As shown; in other examples, in the portion of the cover plate 2 corresponding to the first bending zone 101, the second surface a2 is recessed toward the first surface a1 to form a groove 20, such as Fig.11 and Fig.12 As shown; in some other examples, in the portion of the cover plate 2 corresponding to the first bending zone 101, the first surface a1 is recessed toward the second surface a2 to form a groove 20, and the second surface a2 is recessed toward the first surface a1 to form a groove 20, as shown Fig.13 and Fig.14 shown.

[0093] In the present embodiment, in the portion of the cover plate 2 corresponding to the first bending zone 101, the first surface a1 is recessed toward the second surface a2 to form a groove 20; and / or, in the portion of the cover plate 2 corresponding to the first bending zone 101, the second surface a2 is recessed toward the first surface a1 to form a groove 20, which can reduce the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101. When the cover plate 2 is bent, the stress on the portion of the cover plate 2 corresponding to the first bending zone 101 can be reduced, which not only reduces the risk of breakage of the portion of the cover plate 2 corresponding to the first bending zone 101, but also improves the bending fatigue resistance of the portion of the cover plate 2 corresponding to the first bending zone 101, avoids the formation of creases after multiple bending, thereby effectively improving the bendability of the cover plate 2.

[0094] It is understandable that the mechanical characteristic of glass material is that the compressive strength of glass is 10 times that of tensile strength. In the case where the cover plate 2 is UTG, the side of the cover plate 2 with a greater risk of breaking is the side subjected to tensile stress.

[0095] As can be seen from the above, when the first bending zone 101 is bent toward the display side, the surface of the portion of the cover plate 2 corresponding to the first bending zone 101, which is close to the display panel 1, is subjected to tensile stress, and the surface of the portion of the cover plate 2 corresponding to the first bending zone 101, which is close to the display panel 1, is subjected to compressive stress. In the case where the second surface a2 is recessed toward the first surface a1 to form the groove 20 in the portion of the cover plate 2 corresponding to the first bending zone 101, by reducing the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101, which is close to the display panel 1, the tensile stress received by the cover plate 2 during the bending process toward the display side can be released, thereby effectively reducing the risk of the portion of the cover plate 2 corresponding to the first bending zone 101 being broken.

[0096] In some embodiments, in a portion of the cover plate 2 corresponding to the second bending zone 102, the first surface a1 is recessed toward the second surface a2 to form a groove 20; and / or, in a portion of the cover plate 2 corresponding to the second bending zone 102, the second surface a2 is recessed toward the first surface a1 to form a groove 20.

[0097] It should be noted that the above “in the portion of the cover plate 2 corresponding to the second bending zone 102, the first surface a1 is recessed toward the second surface a2 to form the groove 20; and / or, in the portion of the cover plate 2 corresponding to the second bending zone 102, the second surface a2 is recessed toward the first surface a1 to form the groove 20” means that, in some examples, in the portion of the cover plate 2 corresponding to the second bending zone 102, the first surface a1 is recessed toward the second surface a2 to form the groove 20, such as Figure 6 , Figure 7 , Fig.11 as well as Fig.14 In other examples, in the portion of the cover plate 2 corresponding to the second bending zone 102, the second surface a2 is recessed toward the first surface a1 to form a groove 20, such as Figure 8 , Fig.12 as well as Fig.13 As shown; in some other examples, in the portion of the cover plate 2 corresponding to the second bending zone 102, the first surface a1 is recessed toward the second surface a2 to form a groove 20, and the second surface a2 is recessed toward the first surface a1 to form a groove 20, as shown Fig. 9 and Fig.10 shown.

[0098] In the present embodiment, in the portion of the cover plate 2 corresponding to the second bending zone 102, the first surface a1 is recessed toward the second surface a2 to form a groove 20; and / or, in the portion of the cover plate 2 corresponding to the second bending zone 102, the second surface a2 is recessed toward the first surface a1 to form a groove 20, which can reduce the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102. When the cover plate 2 is bent, the stress on the portion of the cover plate 2 corresponding to the second bending zone 102 can be reduced, which not only reduces the risk of breakage of the portion of the cover plate 2 corresponding to the second bending zone 102, but also improves the bending fatigue resistance of the portion of the cover plate 2 corresponding to the second bending zone 102, avoids the formation of creases after multiple bending, and effectively improves the bendability of the cover plate 2.

[0099] For example, taking the cover plate 2 as UTG, the position analysis data of the starting point of the defective UTG Crack of the whole machine shows that about half of the breakage of the cover plate 2 starts from the portion of the cover plate 2 corresponding to the second bending zone 102. By thinning the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102, the risk of the cover plate 2 breaking can be reduced to a large extent.

[0100] In addition, it can be known from the above that when the second bending zone 102 is bent toward the non-display side, the surface of the portion of the cover plate 2 corresponding to the second bending zone 102, which is close to the display panel 1, is subjected to compressive stress, and the surface of the portion of the cover plate 2 corresponding to the second bending zone 102, which is close to the display panel 1, is subjected to tensile stress. In the case where the first surface a1 is recessed toward the second surface a2 to form the groove 20 in the portion of the cover plate 2 corresponding to the second bending zone 102, by reducing the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102, which is away from the display panel 1, the tensile stress received by the cover plate 2 during the bending process toward the non-display side can be released, thereby effectively reducing the risk of the portion of the cover plate 2 corresponding to the second bending zone 102 being broken.

[0101] In some embodiments, Figure 6 to Figure 14 As shown, along the thickness direction of the cover plate 2 and in the direction away from the bisector of the cover plate 2, the opening of the groove 20 gradually becomes larger. Figure 7 As shown, the bisector of the cover plate 2 is parallel to the plane where the cover plate 2 is located. The maximum thicknesses of the portions of the cover plate 2 located on opposite sides of the bisector DD are equal.

[0102] Exemplarily, there is a smooth transition between the bottom wall and the side wall of the groove 20. For example, the angle between the bottom wall and the side wall of the groove 20 is an arc angle.

[0103] For example, the side wall of the groove 20 may be an arc surface.

[0104] like Fig.15 As shown, Fig.15 : is a measured thickness diagram of a portion of the cover plate 2 corresponding to the first bending zone 101 or the second bending zone 102 in some embodiments. Fig.15 The middle ordinate is the measured thickness of the cover plate 2 .

[0105] Depend on Fig.15 It can be seen that the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 gradually decreases and then gradually increases. Specifically, the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 gradually decreases from 70 μm to about 30 μm, and then gradually increases from 30 μm to 70 μm.

[0106] For example, the angle between the bottom wall and the side wall of the groove 20 may be 0.15°. The slope of the side wall of the groove 20 may be 1 / 375.

[0107] In this embodiment, the opening of the groove 20 gradually becomes larger, and during the formation of the subsequent film layer, the subsequent film layer can be prevented from being broken at the position of the groove 20, thereby ensuring the continuity of the subsequent film layer.

[0108] In some embodiments, the ratio of the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102 to the thickness of the cover plate 2 corresponding to the connection zone 103 is greater than or equal to 0.03 and less than 1. For example, the ratio of the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102 to the thickness of the cover plate 2 corresponding to the connection zone 103 may be 0.03, 0.04, 0.05, 0.06, 0.07, 0.09, etc. The embodiments of the present disclosure are not limited to this.

[0109] Exemplarily, the thickness of the cover plate 2 corresponding to the connection area 103 ranges from 50 μm to 1000 μm, and the thickness of the cover plate 2 corresponding to the second bending area 102 ranges from 30 μm to 300 μm.

[0110] Therefore, by thinning the portion of the cover plate 2 corresponding to the second bending zone 102, when the cover plate 2 is bent, the stress on the portion of the cover plate 2 corresponding to the second bending zone 102 can be reduced, thereby reducing the risk of breakage of the portion of the cover plate 2 corresponding to the second bending zone 102, and avoiding the portion of the cover plate 2 corresponding to the second bending zone 102 being too thin, which would cause the impact resistance of the portion of the cover plate 2 corresponding to the second bending zone 102 to be too low, thereby affecting the impact resistance and scratch resistance of the display module 100; at the same time, the portion of the cover plate 2 corresponding to the connection zone 103 has a larger thickness, which ensures the pressure resistance of the portion of the cover plate 2 corresponding to the connection zone 103, thereby further improving the impact resistance and scratch resistance of the display module 100.

[0111] Furthermore, the ratio of the thickness of the portion of the cover plate 2 corresponding to the second bending area 102 to the thickness of the cover plate 2 corresponding to the connecting area 103 may be in the range of 0.1 to 0.5.

[0112] Furthermore, the ratio of the thickness of the portion of the cover plate 2 corresponding to the second bending area 102 to the thickness of the cover plate 2 corresponding to the connection area 103 may be in the range of 0.2 to 0.4.

[0113] It should be noted that, when the thickness of the cover plate 2 corresponding to the connection area 103 is equal to the thickness of the cover plate 2 corresponding to the non-bending portion 11, the ratio of the thickness of the portion of the cover plate 2 corresponding to the second bending area 102 to the thickness of the cover plate 2 corresponding to the connection area 103 is, that is, the ratio of the thickness of the portion of the cover plate 2 corresponding to the second bending area 102 to the overall thickness of the cover plate 2. In some examples, the ratio of the thickness of the portion of the cover plate 2 corresponding to the first bending area 101 to the thickness of the cover plate 2 corresponding to the connection area 103 is greater than or equal to 0.03 and less than 1. For example, the ratio of the thickness of the portion of the cover plate 2 corresponding to the first bending area 101 to the thickness of the cover plate 2 corresponding to the connection area 103 may be: 0.03, 0.04, 0.05, 0.06, 0.07, etc. The embodiments of the present disclosure are not limited to this.

[0114] Exemplarily, the thickness of the cover plate 2 corresponding to the connection area 103 ranges from 50 μm to 1000 μm, and the thickness of the cover plate 2 corresponding to the first bending area 101 ranges from 30 μm to 300 μm.

[0115] Therefore, by thinning the portion of the cover plate 2 corresponding to the first bending zone 101, when the cover plate 2 is bent, the stress on the portion of the cover plate 2 corresponding to the first bending zone 101 can be reduced, thereby reducing the risk of breakage of the portion of the cover plate 2 corresponding to the first bending zone 101, and avoiding the portion of the cover plate 2 corresponding to the first bending zone 101 being too thin, which would cause the impact resistance of the portion of the cover plate 2 corresponding to the first bending zone 101 to be too low, thereby affecting the impact resistance and scratch resistance of the display module 100; at the same time, the portion of the cover plate 2 corresponding to the connection zone 103 has a larger thickness, which ensures the pressure resistance of the portion of the cover plate 2 corresponding to the connection zone 103, thereby further improving the impact resistance and scratch resistance of the display module 100.

[0116] In some embodiments, the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102 is less than or equal to 45 μm. For example, the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102 may be 45 μm, 44 μm, 43 μm, 42 μm, 41 μm, etc. The embodiments of the present disclosure are not limited to this.

[0117] according to Figure 5 From the curve diagram of the force variation of the cover plate 2 as a function of position, it can be obtained that the maximum value of the tensile stress on the portion of the cover plate 2 corresponding to the second bending zone 102 is 400 MPa.

[0118] When the cover plate 2 is UTG, the elastic modulus of the cover plate 2 is in the range of 60000 MPa to 80000 MPa. The bending radius R of the cover plate 2 is in the range of 1 mm to 10 mm.

[0119] Combined with the above formula 1, it can be obtained that when the elastic modulus of the cover plate 2 is in the range of 60000MPa to 80000MPa and the bending radius R of the cover plate 2 is in the range of 1mm to 10mm, by making the thickness of the portion of the cover plate 2 corresponding to the second bending zone 102 less than or equal to 45μm, the thinning design of the portion of the cover plate 2 corresponding to the second bending zone 102 is achieved. On the one hand, it ensures that the portion of the cover plate 2 corresponding to the second bending zone 102 has a smaller thickness, and ensures that the tensile stress on the portion of the cover plate 2 corresponding to the second bending zone 102 is within the safe value of the tensile stress that the portion of the cover plate 2 corresponding to the second bending zone 102 can withstand, thereby reducing the risk of breakage of the portion of the cover plate 2 corresponding to the second bending zone 102, and can also improve the bending performance of the portion of the cover plate 2 corresponding to the second bending zone 102, thereby improving the bendability of the cover plate 2.

[0120] In some embodiments, the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 is less than or equal to 35 μm. For example, the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 may be 35 μm, 34 μm, 33 μm, 32 μm, 31 μm, etc. The embodiments of the present disclosure are not limited to this.

[0121] according to Figure 5 From the curve diagram of the force variation of the cover plate 2 as a function of position, it can be obtained that the maximum value of the tensile stress on the portion of the cover plate 2 corresponding to the first bending zone 101 is 600 MPa.

[0122] Combined with the above formula 1, it can be obtained that when the elastic modulus of the cover plate 2 is in the range of 60000MPa to 80000MPa and the bending radius R of the cover plate 2 is in the range of 1mm to 10mm, by making the thickness of the portion of the cover plate 2 corresponding to the first bending zone 101 less than or equal to 35μm, the thinning design of the portion of the cover plate 2 corresponding to the first bending zone 101 is achieved. On the one hand, it ensures that the portion of the cover plate 2 corresponding to the first bending zone 101 has a smaller thickness, and ensures that the tensile stress on the portion of the cover plate 2 corresponding to the first bending zone 101 is within the safe value of the tensile stress that the portion of the cover plate 2 corresponding to the first bending zone 101 can withstand, thereby reducing the risk of breakage of the portion of the cover plate 2 corresponding to the first bending zone 101, and improving the bending performance of the portion of the cover plate 2 corresponding to the first bending zone 101, thereby improving the bendability of the cover plate 2.

[0123] In some embodiments, Figure 6 As shown, the display module 100 includes a display area AA and a non-display area BB located around the display area AA. For example, the non-display area BB is adjacent to the display area AA, and the non-display area BB surrounds the display area AA in a full circle.

[0124] like Figure 6 As shown, the display module 100 further includes: a covering layer 3 , a light shielding pattern layer 4 and a first adhesive layer 5 .

[0125] Among them, Figure 6 As shown, the covering layer 3 is located on the side of the cover plate 2 away from the display panel 1; the shading pattern layer 4 is located on the side of the covering layer 3 close to the display panel 1, the shading pattern layer 4 is located in the non-display area BB, and is arranged around the display area AA; the first adhesive layer 5 is located between the shading pattern layer 3 and the cover plate 2, and part of the first adhesive layer 5 is filled in the groove 20.

[0126] Exemplarily, the material of the covering layer 3 includes, but is not limited to, CPI (Colorless polyimide), PET, TPU (Thermoplastic polyurethane), and PMMA (polymethyl methacrylate).

[0127] For example, the material of the cover layer 3 includes CPI. Since CPI has high hardness, scratch resistance, and impact resistance, when CPI is used as the cover layer 3, the impact resistance and scratch resistance of the display module 100 can be improved.

[0128] For another example, the material of the covering layer 3 includes TPU. Since TPU has high strength and high toughness, when TPU is used as the covering layer 3, when the display module 100 changes from a folded state to a flat state, the recovery ability of the display module 100 can be improved.

[0129] For example, the first adhesive layer 5 may be optical clear adhesive (OCA), and the cover layer 3 and the cover plate 2 are bonded together by the first adhesive layer 5 .

[0130] Exemplarily, the light-shielding pattern layer 4 may be black ink, white ink, or ink of other colors.

[0131] The shading pattern layer 4 can block the opaque circuits and other structures in the non-display area BB of the display panel 1 to achieve a decorative effect; it can also cover the portion of the cover plate 2 located in the non-display area BB to effectively isolate the edge light beams of the cover plate 2, and can also absorb or reflect the diffusely reflected light inside the cover plate 2 to prevent light from passing through the edge of the cover plate 2, thereby avoiding the halo phenomenon in the display module 100.

[0132] In other embodiments, Fig.16 As shown, the light shielding pattern layer 4 is located on a side of the cover plate 2 close to the display panel 1 .

[0133] Therefore, on the one hand, by setting a shading pattern layer 4 in the non-display area BB, the opaque circuits and other structures in the non-display area BB are blocked to achieve a decorative effect, and the edge light beams of the cover plate 2 are effectively isolated, and the diffusely reflected light inside the cover plate 2 is absorbed or reflected to prevent the light from passing through the edge of the cover plate 2, thereby preventing the display module 100 from having a halo phenomenon; on the other hand, when the shading pattern layer 4 is located on the side of the cover plate 2 close to the display panel 1, the above-mentioned covering layer 3 can use a client-replaceable protective film, which can avoid re-setting a layer of client-replaceable protective film on the covering layer 3, thereby achieving a certain degree of lightness and thinness of the display module 100.

[0134] In some embodiments, when the shading pattern layer 4 is located on the side of the cover plate 2 close to the display panel 1, the display module 100 also includes: an anti-fouling layer (Anti-Fingerprint and Scratch, abbreviated as AF) located between the cover plate 2 and the first adhesive layer 5, and the first adhesive layer 5 is peelable relative to the anti-fouling layer so that the covering layer 3 can be replaced.

[0135] Exemplarily, the covering layer 3 is a client-replaceable protective film.

[0136] For example, the material of the anti-fouling layer is usually fluoride, which achieves the effect of oil and water repellency by increasing the surface water drop angle, thereby making it difficult for dirt or other film layers to adhere.

[0137] Specifically in the embodiments of the present disclosure, an anti-fouling layer is provided between the cover plate 2 and the first adhesive layer 5, and the anti-fouling layer is utilized to prevent dirt or other film layers from adhering easily. When the covering layer 3 is a replaceable protective film by the client, it is convenient for the user to peel off the covering layer 3 and replace the covering layer 3 with other protective films.

[0138] In some embodiments, Figure 6 and Fig.16 As shown, the display module 100 further includes: a second adhesive layer 6 located between the cover plate 2 and the display panel 1 ; a portion of the second adhesive layer 6 is filled in the groove 20 .

[0139] Exemplarily, the materials of the second adhesive layer 6 and the first adhesive layer 5 may be the same or different, which is not limited in the embodiments of the present disclosure.

[0140] For example, the second adhesive layer 6 may be an OCA adhesive. Thus, the display panel 1 and the cover plate 2 are bonded together via the second adhesive layer 6 .

[0141] In some embodiments, Fig.17 As shown, the display module 100 also includes: a first buffer layer 7 located between the cover plate 2 and the display panel 1, and a portion of the first buffer layer 7 is filled in the groove 20; an edge of the first buffer layer 7 protrudes compared to the edge of the cover plate 2; a second buffer layer 8 located on the side of the cover plate 2 away from the display panel 1, the second buffer layer 8 covers the surface of the cover plate 2 away from the display panel 1 and the side of the cover plate 2, and the second buffer layer 8 is in contact with the edge of the first buffer layer 7.

[0142] Exemplarily, the material of the first buffer layer 7 and the material of the second buffer layer 8 may include at least one of a polymer, transparent PI (Polyimide), or PET (Polyethylene terephthalate). Of course, the material of the first buffer layer 7 and the material of the second buffer layer 8 are not limited to the above materials, as long as they are transparent and can play a buffering role.

[0143] In addition, the material of the first buffer layer 7 and the material of the second buffer layer 8 may be the same or different, which is not limited in the embodiments of the present disclosure.

[0144] It should be noted that, in the embodiments of the present disclosure, the surface of the cover plate 2 away from the display panel 1 refers to the surface of the cover plate 2 close to the display panel 1 and opposite to the display panel 1 after the cover plate 2 and the display panel 1 are attached. The side of the cover plate 2 refers to the side connecting the surface of the cover plate 2 close to the display panel 1 and the surface of the cover plate 2 away from the display panel 1.

[0145] In the present embodiment, a first buffer layer 7 is arranged between the cover plate 2 and the display panel 1. When the display panel 1 is subjected to a large force, the display panel 1 can be protected so that the display panel 1 is not easily damaged. At the same time, the circuit structure located in the display panel 1 will not be damaged due to the squeezing of the display panel 1. At the same time, the second buffer layer 8 is used to wrap the surface of the cover plate 2 away from the display panel 1 and the side of the cover plate 2. When the display module 100 falls, the cover plate 2 can be protected, thereby improving the reliability of the display module 100.

[0146] In some embodiments, Fig.17 As shown, when the display module 100 further includes: the above-mentioned first buffer layer 7 and second buffer layer 8 , the shading pattern layer 4 can be located on a side of the first buffer layer 7 close to the display panel 1 , and the shading pattern layer 4 is located within the range of the first buffer layer 7 .

[0147] Therefore, on the one hand, the light-shielding pattern layer 4 is used to block the opaque circuits and other structures in the non-display area BB to achieve a decorative effect, and to effectively isolate the edge light beams of the cover plate 2, so that the diffusely reflected light inside the cover plate 2 is absorbed or reflected to prevent the light from passing through the edge of the cover plate 2, thereby preventing the display module 100 from having a halo phenomenon; on the other hand, the light-shielding pattern layer 4 is located within the range of the first buffer layer 7, which can avoid the need for the light-shielding pattern layer 4 to be attached to the cover plate 2 and the first buffer layer 7 at the same time, thereby improving the adhesion effect of the light-shielding pattern layer 4.

[0148] In addition, an OCA adhesive layer may be provided between the light shielding pattern layer 4 and the display panel 1. The display panel 1 and the cover plate 2 are bonded together by the OCA adhesive layer.

[0149] Furthermore, the material of the second buffer layer 8 includes a hydrophobic and oleophobic material.

[0150] For example, the hydrophobic and oleophobic material may include a perfluoropolyether polymer, which can increase the water drop angle on the surface of the second buffer layer to achieve the effects of oleophobic and hydrophobicity, thereby making it difficult for dirt or other film layers to adhere.

[0151] It can be understood that when the display module 100 leaves the factory, a client-replaceable protective film is also provided on the side of the second buffer layer 8 away from the cover plate 2. In the embodiment of the present disclosure, by making the material of the second buffer layer 8 include a hydrophobic and oleophobic material and utilizing the anti-fouling layer to prevent dirt or other film layers from adhering easily, it is convenient for users to peel off the client-replaceable protective film and replace the client-replaceable protective film with other protective films.

[0152] In some embodiments, Fig.18 As shown, when the display module 100 further includes: the first buffer layer 7 and the second buffer layer 8 mentioned above, the display module 100 further includes: a third buffer layer 9 .

[0153] like Fig.18 As shown, the third buffer layer 9 is located on a side of the second buffer layer 8 away from the first buffer layer 7. The light shielding pattern layer 4 is located between the third buffer layer 9 and the second buffer layer 8.

[0154] The material of the third buffer layer 9 may include at least one of polymer, transparent PI (Polyimide), or PET (Polyethylene terephthalate).

[0155] In some embodiments, the material of the third buffer layer 9 includes a hydrophobic and oleophobic material; and / or, the material of the third buffer layer 9 includes a hardening coating material.

[0156] It should be noted that the above-mentioned “the material of the third buffer layer 9 includes hydrophobic and oleophobic material; and / or, the material of the third buffer layer 9 includes a hardened coating material” means that, in some examples, the material of the third buffer layer 9 includes a hydrophobic and oleophobic material; in other examples, the material of the third buffer layer 9 includes a hardened coating material; in yet other examples, the material of the third buffer layer 9 includes both a hydrophobic and oleophobic material and a hardened coating material.

[0157] The hydrophobic and oleophobic materials can refer to the above description and will not be described again here.

[0158] Exemplarily, the hardening coating material may include nano inorganic particles (such as SiO2), silicon dioxide organic-inorganic composites, etc. The material of the third buffer layer 9 includes the hardening coating, which can make the third buffer layer 9 have a higher hardness and further improve the scratch resistance of the display module 100.

[0159] In some embodiments, Figure 6 , Figure 16 to Figure 18 As shown, the display module 100 further includes: a support member 30 located on the non-display side of the display panel 1 .

[0160] The support member 30 is used to support the display panel 1 .

[0161] Exemplarily, the material of the support member 30 may be metal, such as stainless steel or titanium alloy, etc. Also exemplary, the material of the support member 30 is non-metal, such as plastic, glass fiber composite material or carbon fiber composite material, etc. The embodiments of the present disclosure are not limited to this.

[0162] Exemplarily, the thickness of the support member 30 ranges from 30 μm to 300 μm. For example, the thickness of the support member 30 may be 30 μm, 50 μm, 100 μm, 200 μm, 300 μm, etc. The embodiments of the present disclosure are not limited thereto.

[0163] Exemplarily, the elastic modulus of the support member 30 ranges from 1MPa to 500GPa. For example, the elastic modulus of the support member 30 may be: 1MPa, 500MPa, 100GPa, 350GPa, 500GPa, etc. The larger the elastic modulus of the support member 30, the stronger its support capacity and the less likely it is to bend. The elastic modulus of the support member 30 ranges from 1MPa to 200Gpa, which can avoid the problem that the elastic modulus of the support member 30 is too large, resulting in the thermal support member 30 being difficult to bend; and the problem that the modulus of the support member 30 is too small, resulting in poor support performance of the support member 30.

[0164] In some examples, such as Figure 6 and Fig.16 As shown, the support member 30 includes a first patterned area 31, the first patterned area 31 corresponds to the first bending area 101, and the size of the first patterned area 31 along the first direction X is greater than or equal to the size of the first bending area 101 along the first direction X; the first patterned area 31 is provided with at least one hole and / or at least one groove. The first direction X is the arrangement direction of at least one bending portion 10 and at least two non-bending portions 11.

[0165] It should be noted that the above-mentioned “the first patterned area 31 is provided with at least one hole and / or at least one groove” means that, in some examples, the first patterned area 31 is provided with at least one hole; in other examples, the first patterned area 31 is provided with at least one groove; in some other examples, the first patterned area 31 includes at least one hole and at least one groove.

[0166] The shape, quantity, depth and arrangement of the holes and grooves may be selected and set according to actual conditions, and the embodiments of the present disclosure do not limit this.

[0167] For example, a plurality of holes may be provided in the first patterned area 31. In the case where a plurality of holes are provided in the first patterned area 31, the plurality of holes may be evenly arranged in an array shape, thereby making the bending performance of the first patterned area 31 better and more stable.

[0168] Wherein, along the thickness direction of the display module 100, the shape of the orthographic projection of each hole may be a rectangle, a circle, a diamond or other irregular shapes, which is not limited in the embodiments of the present disclosure.

[0169] The cross-section of each hole is in the shape of a rectangle, a semicircle, a semi-ellipse, a trapezoid, a triangle or other irregular shapes, and the cross-section is a cross-section parallel to the axial direction of the hole.

[0170] In this embodiment, by patterning the portion of the support member 30 corresponding to the first bending zone 101, the stress on the portion of the support member 30 corresponding to the first bending zone 101 during the bending process can be reduced, and the flexibility of the portion of the support member 30 corresponding to the first bending zone 101 can be improved, making the display module 100 easier to bend.

[0171] In some examples, such as Figure 6 and Fig.16 As shown, the support member 30 includes a second patterned area 32, the second patterned area 32 corresponds to the second bending area 102, and the size of the second patterned area 32 along the first direction X is greater than or equal to the size of the second bending area 102 along the first direction X; the second patterned area 32 is provided with at least one hole and / or at least one groove.

[0172] It should be noted that the above-mentioned “the second patterned area 32 is provided with at least one hole and / or at least one groove” means that, in some examples, the second patterned area 32 is provided with at least one hole; in other examples, the second patterned area 32 is provided with at least one groove; in some other examples, the second patterned area 32 includes at least one hole and at least one groove.

[0173] For example, the second patterned area 32 may be provided with a plurality of grooves. In the case where the second patterned area 32 may be provided with a plurality of grooves, the plurality of grooves may be evenly arranged in an array shape, thereby making the bending performance of the second patterned area 32 better and more stable.

[0174] In this embodiment, by patterning the portion of the support member 30 corresponding to the second bending zone 102, the stress on the portion of the support member 30 corresponding to the second bending zone 102 during the bending process can be reduced, and the flexibility of the portion of the support member 30 corresponding to the second bending zone 102 can be improved, making the display module 100 easier to bend.

[0175] In some examples, the ratio of the overall thickness of the cover plate 2 to the thickness of the support member 30 may be in the range of 0.1-10.

[0176] Optionally, the ratio of the overall thickness of the cover plate 2 to the thickness of the support member 30 may be in the range of 0.2-5.

[0177] Furthermore, the ratio of the overall thickness of the cover plate 2 to the thickness of the support member 30 may be in the range of 0.5-2.

[0178] By adopting the above-mentioned setting, the overall thickness of the cover plate 2 and the thickness of the support member 30 are adjusted to make the neutral layer position of the display module 100 optimal. For example, the thickness of the cover plate 2 is smaller and the thickness of the support member 30 is larger, so that the neutral layer position of the display module 100 is offset toward the direction of the support member 30, thereby reducing the tensile stress in the display panel 1 and preventing the devices in the bending portion 10 of the display panel 1 from being damaged, thereby improving the problem that the devices in the bending portion 10 of the display panel 1 are easily damaged.

[0179] In some examples, the ratio of the size of the groove 20 along the first direction X to the size of the first patterned region 31 along the first direction X ranges from 0.1 to 10.

[0180] Optionally, the ratio of the size of the groove 20 along the first direction X to the size of the first patterned area 31 along the first direction X is in the range of 0.2-5.

[0181] Further, the ratio of the size of the groove 20 along the first direction X to the size of the first patterned area 31 along the first direction X is in the range of 0.5 to 2. With the above configuration, by adjusting the size of the groove 20 along the first direction X and the size of the first patterned area 31 along the first direction X, it is ensured that the display module 100 has good impact resistance and good bending performance.

[0182] In some embodiments, Fig.19 As shown, the edge of the cover plate 2 exceeds the edge of the display panel 1 .

[0183] like Fig.19 As shown, the display module 100 also includes: a middle frame 40, which is installed at the edge of the cover plate 2, and a step 41 is provided on the side of the middle frame 40 close to the cover plate 2, and one end of the cover plate 2 close to the middle frame 40 is overlapped at the step 41.

[0184] Exemplarily, at one end of the cover plate 2 close to the middle frame 40 , a portion of the side surface of the cover plate 2 close to the display panel 1 overlaps at the step 41 and is bonded to the middle frame 40 .

[0185] For example, the cover plate 2 may be overlapped at the step 41 and bonded to the middle frame 40 by OCA glue.

[0186] Exemplarily, the cross-section of the middle frame 40 is substantially “L”-shaped.

[0187] For example, Fig.19 As shown, the display module 100 further includes: a plastic frame 50 located on a side of the support member 30 away from the display panel 1 . A portion of the side surface of the plastic frame 50 away from the support member 30 abuts against the middle frame 40 .

[0188] In one implementation, a pressure strip is provided on the display side of the display module 100, and the display panel 1 is fixed by the pressure strip and the middle frame. The pressure strip is a stacked metal layer and a rubber layer, resulting in a black side span at the edge of the display module 100.

[0189] In this embodiment, the cover plate 2 is located on the display side of the display panel 1, the edge of the cover plate 2 exceeds the edge of the display panel 1, and the cover plate 2 is overlapped at the step 41 of the middle frame 40, and the rubber frame 50 located on the non-display side of the display panel 1 is abutted against the middle frame 40, thereby achieving fixed crimping of the display panel 1, improving the problem that the edge of the display module 100 is easily warped during the folding process; moreover, compared with fixing the display panel 1 by means of a pressure strip and a middle frame, the display module 100 disclosed in the present invention achieves a borderless design.

[0190] In some embodiments, Fig. 20 and Fig.21 As shown, the display panel 1 includes a substrate 110 . The thickness of the portion of the substrate 110 corresponding to the first bending area 101 and the second bending area 102 is smaller than the thickness of the portion of the substrate 110 corresponding to the non-bending portion 11 .

[0191] In some examples, the substrate 110 may be a flexible substrate, such as a PET (Polyethylene terephthalate) substrate, a PEN (Polyethylenenaphthalate diformic acid glycol ester) substrate, or a PI (Polyimide) substrate.

[0192] In some other examples, the substrate 110 may be ultra-thin glass.

[0193] With the above arrangement, the thickness of the substrate 110 corresponding to the first bending area 101 and the second bending area 102 is smaller, which can improve the bending performance of the display panel 1 and prevent the devices in the first bending area 101 and the second bending area 102 from being damaged.

[0194] For example, Fig. 20 and Fig.21 As shown, the display panel 1 further includes: a circuit structure layer 120 located on the substrate 110 and a light emitting device layer 130 located on a side of the circuit structure layer 120 away from the substrate 110. The circuit structure layer 120 includes a plurality of pixel driving circuits 121 and a plurality of signal lines.

[0195] The pixel driving circuit 121 is generally composed of thin film transistors (TFT), capacitors and other electronic devices. For example, the pixel driving circuit 121 can specifically be a "2T1C", "6T1C", "7T1C", "6T2C" or "7T2C" structure. Here, "T" represents a transistor, such as a thin film transistor. The number before "T" represents the number of transistors. "C" represents a capacitor, and the number before "C" represents the number of capacitors. In the drawings of some embodiments of the present disclosure, only one thin film transistor 122 is used as an example for illustration. For example, the thin film transistor 122 can be a driving transistor.

[0196] The light emitting device layer 130 includes a plurality of light emitting devices 131, and the light emitting devices 131 are electrically connected to the pixel driving circuit 121. The pixel driving circuit 121 can provide a driving signal to the light emitting device 131 to drive the light emitting device 131 to emit light.

[0197] Exemplarily, there are various electrical connection relationships between the light emitting device 131 and the pixel driving circuit 121 , which can be selected and set according to actual needs, and the present disclosure does not limit this.

[0198] For example, a plurality of pixel driving circuits 121 and a plurality of light emitting devices 131 may be coupled in a one-to-one correspondence. For another example, one pixel driving circuit 121 may be coupled to a plurality of light emitting devices 131. For another example, a plurality of pixel driving circuits 121 may be coupled to one light emitting device 131.

[0199] Below, the present disclosure takes the coupling of a pixel driving circuit 121 and a light emitting device 131 as an example to schematically illustrate the structure of the display panel 1 .

[0200] Exemplarily, in the display panel 1, the pixel driving circuit 121 can generate a driving signal, and each light-emitting device 131 can emit light under the driving action of the driving signal generated by the corresponding pixel driving circuit 121, and the light emitted by multiple light-emitting devices 131 cooperates with each other, so that the display panel 1 can realize image display.

[0201] Exemplarily, the light emitting device 131 may be an OLED light emitting device.

[0202] For example, Fig. 20 and Fig.21 As shown, the light emitting device 131 includes an anode 1311, a light emitting portion 1312 and a cathode 1313 which are sequentially stacked in a direction away from the substrate 110. The anode 1311 is electrically connected to the drain of the thin film transistor 122 used as a driving transistor in the pixel driving circuit 121.

[0203] For example, Fig. 20 and Fig.21 As shown, the display panel 1 further includes: an encapsulation layer 140 located on a side of the light emitting device layer 130 away from the circuit structure layer 120 .

[0204] For example, the encapsulation layer 140 may be a thin film encapsulation (TFE) or an encapsulation substrate. The encapsulation layer 140 is configured to encapsulate the light emitting device layer 130 to block water and oxygen, thereby preventing the light emitting devices in the light emitting device layer 130 from being damaged by water and oxygen, thereby extending the life of the light emitting devices.

[0205] For another example, the encapsulation layer 140 includes a first inorganic layer, an organic layer, and a second inorganic layer sequentially arranged from bottom to top. Of course, the encapsulation layer 140 may also include more inorganic layers and organic layers.

[0206] In some examples, such as Fig.21 As shown, the display panel 1 further includes: a touch function layer 150 located on a side of the encapsulation layer 140 away from the light emitting device layer 130. The touch function layer 150 is used to realize the touch function of the display panel 1.

[0207] For example, the touch function layer 150 may be an FMLOC structure, thereby reducing the thickness of the display panel 1 and facilitating a thin and light design of the display panel 1 .

[0208] 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: A display panel is included, wherein the display panel has at least one bending portion and at least two non-bending portions, and two adjacent non-bending portions are connected by one of the bending portions; The bending portion includes a first bending area, two connecting areas and two second bending areas, the two connecting areas are respectively connected to two sides of the first bending area, a side of each connecting area away from the first bending area is connected to a second bending area, and a side of the second bending area away from the connecting area is connected to the non-bending portion; When the display panel is in a bent state, a center of curvature of the first bending area and a center of curvature of the second bending area are respectively located on two sides of the display panel; The display module further includes a cover plate located on the display side of the display panel, and a thickness of a portion of the cover plate corresponding to the first bending area and the second bending area is smaller than a thickness of a portion of the cover plate corresponding to the connection area.

2. The display module according to claim 1, characterized in that: The cover plate comprises a first surface and a second surface opposite to each other, wherein the first surface is farther away from the display panel than the second surface; In a portion of the cover plate corresponding to the first bending zone, the first surface is recessed toward the second surface to form a groove; and / or, In a portion of the cover plate corresponding to the first bending zone, the second surface is recessed toward the first surface to form a groove.

3. The display module according to claim 1, characterized in that: The cover plate comprises a first surface and a second surface opposite to each other, wherein the first surface is farther away from the display panel than the second surface; In a portion of the cover plate corresponding to the second bending area, the first surface is recessed toward the second surface to form a groove; and / or, In a portion of the cover plate corresponding to the second bending zone, the second surface is recessed toward the first surface to form a groove.

4. The display module according to claim 2, characterized in that: The opening of the groove gradually becomes larger along the thickness direction of the cover plate and in the direction away from the bisector of the cover plate; wherein the bisector is parallel to the plane where the cover plate is located, and the maximum thickness of the parts of the cover plate located on opposite sides of the bisector is equal.

5. The display module according to any one of claims 1 to 4, characterized in that: The ratio of the thickness of the portion of the cover plate corresponding to the second bending zone to the thickness of the cover plate corresponding to the connecting zone is greater than or equal to 0.03 and less than 1; and / or, The ratio of the thickness of the cover plate corresponding to the first bending zone to the thickness of the cover plate corresponding to the connecting zone is greater than or equal to 0.03 and less than 1.

6. The display module according to any one of claims 1 to 4, characterized in that: The thickness of a portion of the cover plate corresponding to the second bending zone is less than or equal to 45 μm.

7. The display module according to any one of claims 1 to 4, characterized in that: The thickness of a portion of the cover plate corresponding to the first bending zone is less than or equal to 35 μm.

8. The display module according to any one of claims 2 to 4, characterized in that: The display module includes a display area and a non-display area around the display area, and the display module also includes: a covering layer located on a side of the cover plate away from the display panel; a light shielding pattern layer located on a side of the cover layer close to the display panel, the light shielding pattern layer being located in the non-display area and arranged around the display area; A first adhesive layer is located between the light-shielding pattern layer and the cover plate; a portion of the first adhesive layer is filled in the groove.

9. The display module according to any one of claims 2 to 4, characterized in that: The display module includes a display area and a non-display area around the display area, and the display module also includes: a covering layer located on a side of the cover plate away from the display panel; A first adhesive layer is located between the cover layer and the cover plate; a portion of the first adhesive layer is filled in the groove; A light shielding pattern layer is located on a side of the cover plate close to the display panel, and the light shielding pattern layer is located in the non-display area and is arranged around the display area.

10. The display module according to claim 9, characterized in that: Also includes: The anti-fouling layer is located between the cover plate and the first adhesive layer, and the first adhesive layer is peelable relative to the anti-fouling layer, so that the cover layer can be replaced.

11. The display module according to any one of claims 2 to 4, characterized in that: Also includes: a second adhesive layer located between the cover plate and the display panel; A portion of the second adhesive layer is filled in the groove.

12. The display module according to any one of claims 2 to 4, characterized in that: Also includes: a first buffer layer located between the cover plate and the display panel, wherein a portion of the first buffer layer fills the groove; an edge of the first buffer layer protrudes beyond an edge of the cover plate; A second buffer layer is located on a side of the cover plate away from the display panel, the second buffer layer covers the surface of the cover plate away from the display panel and the side of the cover plate, and the second buffer layer abuts against an edge of the first buffer layer.

13. The display module according to claim 12, characterized in that: The display module includes a display area and a non-display area around the display area, and the display module also includes: The light-shielding pattern layer is located on a side of the first buffer layer close to the display panel, the light-shielding pattern layer is located in the non-display area and is arranged around the display area; the light-shielding pattern layer is located within the range of the first buffer layer.

14. The display module according to claim 13, characterized in that: The material of the second buffer layer includes a hydrophobic and oleophobic material.

15. The display module according to claim 12, characterized in that: The display module includes a display area and a non-display area around the display area, and the display module also includes: a third buffer layer located on a side of the second buffer layer away from the first buffer layer; A light shielding pattern layer is located between the third buffer layer and the second buffer layer, and the light shielding pattern layer is located in the non-display area and is arranged around the display area.

16. The display module according to claim 15, characterized in that: The material of the third buffer layer includes a hydrophobic and oleophobic material; and / or, The material of the third buffer layer includes a hardening coating material.

17. The display module according to any one of claims 1 to 4, characterized in that: Also includes: a support member located on a non-display side of the display panel; The support member includes a first patterned area, the first patterned area corresponds to the first bending area, and the size of the first patterned area along the first direction is greater than or equal to the size of the first bending area along the first direction; the first patterned area is provided with at least one hole and / or at least one groove; and / or, The support member includes a second patterned area, the second patterned area corresponds to the second bending area, and the size of the second patterned area along the first direction is greater than or equal to the size of the second bending area along the first direction; the second patterned area is provided with at least one hole and / or at least one groove; Wherein, the first direction is the arrangement direction of the at least one bending portion and the at least two non-bending portions.

18. The display module according to any one of claims 1 to 4, characterized in that: The edge of the cover plate exceeds the edge of the display panel; the display module further includes: The middle frame is installed at the edge of the cover plate, and a step is provided on a side of the middle frame close to the cover plate, and one end of the cover plate close to the middle frame is overlapped at the step.

19. The display module according to any one of claims 1 to 4, characterized in that: The display panel comprises: The thickness of the substrate corresponding to the first bending area and the second bending area is smaller than the thickness of the substrate corresponding to the non-bending portion.

20. A display device, characterized in that: It comprises the display module as claimed in any one of claims 1 to 19.

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