Display module and electronic equipment
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2026-03-10
AI Technical Summary
It is difficult for existing folding electronic equipment to take into account high stiffness and excellent bending performance when bending and flattening, and its impact and extrusion resistance are insufficient.
A display module with an unequal thickness structure is designed, including a display screen and a cover plate. Different areas of the cover plate have different thicknesses and elastic modulus. Through the unequal thickness design and the use of buffer layers, the non-bending area is enhanced. The stiffness and bendability of the bend area are improved by supporting plates and buffer pads.
It is achieved to improve the stiffness of the non-bending area and the bendable performance of the bend area without increasing the overall thickness, enhance the impact and extrusion resistance of the electronic equipment, and improve the use performance.
Smart Images
Figure CN121646799A_ABST
Abstract
Description
Display modules and electronic devices
[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on June 30, 2023, with application number 202310808453.6 and invention name “Display module and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field
[0002] The present application relates to the field of display technology, and in particular to a display module and a foldable electronic device including the display module. Background Art
[0003] With the development of human-computer interaction technology, display has become an important element of human-computer interaction. Therefore, foldable screen electronic devices have emerged, such as foldable mobile phones.
[0004] Improving the performance of foldable electronic devices is a major challenge. For example, the folding area must have good bendability when folded, the non-bending area must have high flattening stiffness when flattened, and good impact and compression resistance must be achieved.
[0005] Summary of the Invention
[0006] The present application provides a display module and an electronic device including the display module, such as a foldable electronic device, with the primary purpose of improving the performance of the electronic device, for example, improving the flattening rigidity of the non-bending region and improving the bending performance of the bending region.
[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:
[0008] In a first aspect, the present application provides a display module, which is a flexible display structure that can be applied to a flexible display device and has bendability.
[0009] The display module includes a display screen and a cover plate, which is arranged on one side of the display surface of the display screen; the display screen includes a first non-bending portion, a second non-bending portion, a third non-bending portion, a first bending portion and a second bending portion, the first bending portion connects the first non-bending portion and the second non-bending portion, the second bending portion connects the second non-bending portion and the third non-bending portion, the cover plate includes a first non-bending area, a second non-bending area, a third non-bending area, a first bending area and a second bending area, the first bending area connects the first non-bending area and the second non-bending area, the second bending area connects the second non-bending area and The third non-bending area; the first non-bending area corresponds to the first non-bending portion, the first bending area corresponds to the first bending portion, the second non-bending area corresponds to the second non-bending portion, the second bending area corresponds to the second bending portion, and the third non-bending area corresponds to the third non-bending portion; the first bending area, the first bending portion, the second bending area and the second bending portion can all be bent along the bending line to switch between the expanded state and the closed state. The display module belongs to a display module structure that can be folded at least three times; wherein, the thickness of the first non-bending area of the cover plate is not equal to the thickness of the second non-bending area.
[0010] In the display module provided in this application, the thickness of the first non-bending region and the thickness of the second non-bending region in the cover plate are unequal, i.e., the cover plate is designed with a unequal thickness structure. For example, in some scenarios, to enhance the stiffness of the first non-bending region (which is exposed in the closed state (to present the image to the user), the thickness of the first non-bending region may be increased. However, the unequal thickness design of the cover plate substantially prevents the bending performance of the first bending region from being affected by the increased thickness of the first non-bending region.
[0011] The display module provided in this application not only has high rigidity in the non-bending region, but also has excellent bendability in the bending region.
[0012] In one implementation, the thickness of the first non-bending region is greater than the thickness of the second non-bending region.
[0013] In some usage scenarios, in the closed state, the first non-bending area is exposed, and the stiffness of the first non-bending area is improved by making the thickness of the first non-bending area greater than the thickness of the second non-bending area.
[0014] In one possible implementation, the cover plate includes: a first substrate and a first buffer layer, the first buffer layer being closer to the display screen than the first substrate; the thickness of the first substrate located in the first non-bending area is greater than the thickness of the first substrate located in the second non-bending area, and / or; the thickness of the first buffer layer located in the first non-bending area is greater than the thickness of the first buffer layer located in the second non-bending area.
[0015] In some implementation structures, at least one of the substrate or the buffer layer in the cover plate may be designed to have unequal thickness.
[0016] In one achievable manner, the thickness of the first buffer layer located in the first bending region gradually decreases from the first non-bending region to the second non-bending region.
[0017] In one achievable manner, the thickness of the first buffer layer in the second non-bending area gradually decreases from the first bending area to the second bending area.
[0018] The thickness of the first buffer layer located in the first bending area and the second non-bending area gradually decreases, and the thick-thin transition area is designed to be wider, which has a better concealing effect on the visual step difference of unequal thickness.
[0019] In one possible implementation, the first buffer layer is disposed on a surface of the first substrate facing the display screen.
[0020] Since the buffer layer is directly disposed on the surface of the substrate, compared to some examples in which the buffer layer is adhered to the substrate by using an adhesive layer, the structure implemented in the present application can reduce the thickness of the display module.
[0021] In one achievable manner, the material of the first buffer layer includes at least one of thermoplastic polyurethane elastomer, silicone gel, and shear thickening material.
[0022] In one possible implementation, the display module further includes a second substrate, the second substrate is disposed between the first buffer layer and the display screen, and the first buffer layer is disposed on a surface of the second substrate facing away from the display screen.
[0023] In this example, the first substrate can be the substrate in the protective layer, and the second substrate can be the substrate in the display cover. If the protective layer and the display cover are set, the first buffer layer can be directly set on the surface of the second substrate of the display cover. The first buffer layer not only plays a buffering role, but also has an adhesive role. Compared with using an adhesive layer to bond the first buffer layer to the second substrate, the thickness of the display module can also be compressed.
[0024] In one achievable manner, the material of the first buffer layer includes optically transparent adhesive (OCA) or the like.
[0025] In one possible implementation, the cover plate also includes a second buffer layer, the second buffer layer includes a first part and a second part; the first part of the second buffer layer is located in the first non-bending area, the second part of the second buffer layer is located in the first bending area, and the elastic modulus of the first part of the second buffer layer is greater than the elastic modulus of the second part of the second buffer layer.
[0026] In some configurations, the display module may also include a second buffer layer. To further enhance the bendability of the bending region, the second buffer layer may be designed to have unequal elastic moduli. In this example, the second buffer layer may be a protective layer disposed on the display surface side of the display, or a buffer layer within the display cover.
[0027] In one possible implementation, the second buffer layer is closer to the display screen than the first buffer layer; or the first buffer layer is closer to the display screen than the second buffer layer.
[0028] In one achievable manner, the first portion of the second buffer layer and the second portion of the second buffer layer are an integrally formed structure; or, the first portion of the second buffer layer and the second portion of the second buffer layer are connected via an adhesive layer.
[0029] For example, when the first part and the second part adopt an integrally molded structure, the buffer layer material can be first coated on the substrate, and then cured in different regions by UV (ultraviolet light) to obtain buffer materials with different hardness; or, the buffer layer material can be heated in different regions to obtain parts with different elastic moduli.
[0030] In one achievable embodiment, the second buffer layer further includes a third part, and the third part of the second buffer layer is located in the second non-bending area; the elastic modulus of the third part of the second buffer layer is smaller than the elastic modulus of the first part of the second buffer layer, and larger than the elastic modulus of the second part of the second buffer layer.
[0031] In one achievable manner, the thickness of the first bending region gradually decreases from the first non-bending region to the second non-bending region.
[0032] In the cover plate, the first non-bending area is a thick area, the second non-bending area is a thin area, and the first bending area connected between the first non-bending area and the second non-bending area is a thin-to-thick transition area.
[0033] In one possible implementation, the thickness of the second non-bending area gradually decreases from the first bending area to the second bending area.
[0034] The thickness of the first bending area and the second non-bending area of the cover gradually decreases, and the thick-to-thin transition area is designed to be wider, which has a better concealing effect on the visual step difference of unequal thickness.
[0035] In one implementation, the thickness of the third non-bending region is smaller than the thickness of the first non-bending region.
[0036] In some scenarios, for a multi-fold display configuration, in the closed state, the first non-bending area is visible to the user, while the second and third non-bending areas are invisible. In this implementation, the cover includes a thick region in the first non-bending area and thin regions in the second and third non-bending areas, meeting the rigidity requirements of the electronic device in this scenario without significantly increasing the thickness of the display module in the closed state.
[0037] In one achievable manner, the thicknesses of the first bending region, the second non-bending region, the second bending region, and the third non-bending region gradually decrease from the first non-bending region to the third non-bending region.
[0038] It has a further masking effect on visual segment differences of unequal thickness.
[0039] In one possible implementation, the display module further includes a support plate and a buffer pad, wherein the support plate is arranged on the side of the display screen away from the display surface; the buffer pad is arranged on the side of the support plate away from the display screen, and the buffer pad is located at a position corresponding to the first bending area.
[0040] In one achievable manner, the display module further includes a support plate and a buffer pad. The support plate is disposed on a side of the display screen away from the display surface; the buffer pad is embedded in a position of the support plate corresponding to the first bending area.
[0041] In some examples, to ensure the bending performance of the bending area, the impact resistance and compression resistance of the bending portion may be weakened. In the examples of this application, by providing a buffer pad in the portion of the support plate corresponding to the first bending area, the cushioning properties of the buffer pad can be utilized to improve the impact resistance and compression resistance of this area. For example, the buffer pad can be provided on the side of the support plate away from the display screen, or the buffer pad can be embedded in the support plate.
[0042] In one achievable manner, when the first bending area is in a closed state, the display surface of the display screen is away from the center of the arc structure formed by the display module relative to the back of the display screen, so that the first bending area forms an outwardly folded bending structure.
[0043] When the electronic device is in a closed state, the screen in the first non-bending area is visible to the user. This application example can also be applied to a case where the screen in the first non-bending area is not visible to the user.
[0044] In one achievable method, when the second bending area is in a closed state, the display surface of the display screen is close to the center of the arc structure formed by the display module relative to the back of the display screen, so that the second bending area forms an inward-folding bending structure; and, when the first bending area is in a closed state, the display surface of the display screen is away from the center of the arc structure formed by the display module relative to the back of the display screen, so that the first bending area forms an outward-folding bending structure.
[0045] In some embodiments of the present application, when the electronic device is in a closed state, an outer folding area and an inner folding area are formed.
[0046] In a second aspect, the present application provides a display module. The display module includes a display screen and a cover plate, wherein the cover plate is arranged on one side of the display surface of the display screen; the display screen includes a first non-bending portion, a second non-bending portion, a third non-bending portion, a first bending portion, and a second bending portion, wherein the first bending portion connects the first non-bending portion and the second non-bending portion, and the second bending portion connects the second non-bending portion and the third non-bending portion; the cover plate includes a first non-bending area, a second non-bending area, a third non-bending area, a first bending area, and a second bending area, wherein the first bending area connects the first non-bending area and the second non-bending area, and the second bending area connects the second non-bending area. bending area and a third non-bending area; the first non-bending area corresponds to the first non-bending portion, the first bending area corresponds to the first bending portion, the second non-bending area corresponds to the second non-bending portion, the second bending area corresponds to the second bending portion, and the third non-bending area corresponds to the third non-bending portion; the first bending area, the first bending portion, the second bending area and the second bending portion can all be bent along the bending line to switch between the expanded state and the closed state. The present application belongs to a display screen that can be folded at least three times; the elastic modulus of the first non-bending area is not equal to the elastic modulus of the first bending area.
[0047] In the display module provided in this application, the cover plate disposed on the display surface side of the display screen is designed with an unequal modulus structure. For example, the elastic modulus of the first non-bending region can be greater than that of the first bending region. This ensures high rigidity in the first non-bending region while also enabling the first bending region to have better bendability.
[0048] In one achievable manner, the elastic modulus of the first non-bending region is greater than the elastic modulus of the first bending region.
[0049] In some usage scenarios, in the closed state, the first non-bending area is exposed, and the elastic modulus of the first non-bending area is greater than the elastic modulus of the first bending area, thereby improving the stiffness of the first non-bending area and ensuring the bendability of the first bending area.
[0050] In one possible implementation, the cover plate includes a substrate and a buffer layer, which are arranged on the display surface side of the display screen, and the buffer layer is closer to the display screen than the substrate; the buffer layer includes a first part and a second part; the first part of the buffer layer is located in the first non-bending area, and the second part of the buffer layer is located in the first bending area, and the elastic modulus of the first part of the buffer layer is greater than the elastic modulus of the second part of the buffer layer.
[0051] In one achievable manner, the first portion of the buffer layer and the second portion of the buffer layer are an integrally formed structure; or, the first portion of the buffer layer and the second portion of the buffer layer are connected via an adhesive layer.
[0052] In some embodiments of the present application, two implementation methods are provided for the cover plate to have unequal moduli. Of course, other methods may also be used.
[0053] In one achievable manner, the buffer layer further includes a third portion, and the third portion of the buffer layer is located in the second non-bending region; the elastic modulus of the third portion of the buffer layer is smaller than the elastic modulus of the first portion of the buffer layer and larger than the elastic modulus of the second portion of the buffer layer.
[0054] In one possible implementation, the display module further includes a support plate and a buffer pad, wherein the support plate is arranged on the side of the display screen away from the display surface; the buffer pad is arranged on the side of the support plate away from the display screen, and the buffer pad is located at a position corresponding to the first bending area.
[0055] In one achievable manner, the display module further includes a support plate and a buffer pad. The support plate is disposed on a side of the display screen away from the display surface; the buffer pad is embedded in a position of the support plate corresponding to the first bending area.
[0056] In some examples, to ensure the bending performance of the bending area, the impact resistance and compression resistance of the bending portion may be weakened. In the examples of this application, by providing a buffer pad in the portion of the support plate corresponding to the first bending area, the cushioning properties of the buffer pad can be utilized to improve the impact resistance and compression resistance of this area. For example, the buffer pad can be provided on the side of the support plate away from the display screen, or the buffer pad can be embedded in the support plate.
[0057] In one achievable manner, when the first bending area is in a closed state, the display surface of the display screen is away from the center of the arc structure formed by the display module relative to the back of the display screen, so that the first bending area forms an outwardly folded bending structure.
[0058] That is, when the electronic device is in a closed state, the screen in the first non-bending area is visible to the user. The present application can also be applied when the screen in the first non-bending area is not visible to the user.
[0059] In one achievable method, when the second bending area is in a closed state, the display surface of the display screen is close to the center of the arc structure formed by the display module relative to the back of the display screen, so that the second bending area forms an inward-folding bending structure; and, when the first bending area is in a closed state, the display surface of the display screen is away from the center of the arc structure formed by the display module relative to the back of the display screen, so that the first bending area forms an outward-folding bending structure.
[0060] In some embodiments of the present application, when the electronic device is in a closed state, an outer folding area and an inner folding area are formed.
[0061] In a third aspect, the present application further provides an electronic device, comprising a housing and a display module according to any of the above implementations, wherein the display module is arranged on the housing.
[0062] The electronic device provided in the embodiment of the present application includes the above-mentioned display module. Therefore, the electronic device provided in the embodiment of the present application and the display module of the above-mentioned technical solution can solve the same technical problems and achieve the same expected effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0063] FIG1 is a structural diagram of a foldable electronic device;
[0064] FIG2 is a structural diagram of a multi-fold display module in a flattened state;
[0065] FIG3 is a structural diagram of a multi-folding display module provided in an embodiment of the present application in a flattened state;
[0066] FIG4 is a structural diagram of a multi-folding display module provided in an embodiment of the present application in a flattened state;
[0067] FIG5 is a structural diagram of a multi-folding display module provided in an embodiment of the present application in a flattened state;
[0068] FIG6 is a structural diagram of a multi-folding display module in a closed state provided by an embodiment of the present application;
[0069] FIG7 is a structural diagram of a multi-folding display module in a flattened state provided by an embodiment of the present application;
[0070] FIG8 is a structural diagram of a multi-folding display module provided in an embodiment of the present application in a flattened state;
[0071] FIG9 is a structural diagram of a multi-folding display module in a flattened state provided by an embodiment of the present application;
[0072] FIG10 is a structural diagram of a multi-folding display module provided in an embodiment of the present application;
[0073] FIG11 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0074] FIG12 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0075] FIG13 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0076] FIG14 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0077] FIG15 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, in which a cover plate is in a flattened state;
[0078] FIG16 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0079] FIG17 is a structural diagram of a multi-folding display module in a flattened state provided by an embodiment of the present application;
[0080] FIG18 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, in which a cover plate is in a flattened state;
[0081] FIG19 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0082] FIG20 is a structural diagram of a multi-folding display module provided by an embodiment of the present application, wherein the cover plate is in a flattened state;
[0083] FIG21 is a structural diagram of a multi-folding display module provided by an embodiment of the present application in a flattened state;
[0084] FIG22 is a structural diagram of a multi-folding display module provided by an embodiment of the present application in a flattened state;
[0085] FIG23 is a structural diagram of a multi-folding display module provided by an embodiment of the present application in a flattened state;
[0086] FIG24 is a structural diagram of a multi-folding display module provided by an embodiment of the present application in a flattened state;
[0087] FIG25 is a structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application. DETAILED DESCRIPTION
[0088] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0089] The present invention provides an electronic device with a foldable screen. The electronic device may include a mobile phone, a tablet computer (pad), a smart wearable product (e.g., a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or other electronic products with a display function. The present invention does not impose any particular restrictions on the specific form of the electronic device with a display function.
[0090] For the convenience of explanation, the structure of the electronic device is described below by taking a mobile phone as an example.
[0091] Figure 1 shows a structural diagram of a foldable screen mobile phone, and the exemplary foldable screen mobile phone is a triple-screen foldable phone. The triple-screen foldable screen mobile phone may include a first housing 100a, a second housing 100b, and a third housing 100c, as well as a display module 11. The display module 11 may continuously cover the first housing 100a, the second housing 100b, and the third housing 100c. The foldable screen mobile phone may also include a first hinge mechanism and a second hinge mechanism.
[0092] The first shell 100a and the second shell 100b are arranged on both sides of the first rotating shaft mechanism and are respectively connected to the first rotating shaft mechanism. The first rotating shaft mechanism can move so that the first shell 100a and the second shell 100b are relatively folded or unfolded, thereby realizing the flattening and closing of the display module 11 arranged on the first shell 100a and the second shell 100b.
[0093] The second shell 100b and the third shell 100c are arranged on both sides of the second hinge mechanism and are respectively connected to the second hinge mechanism. The second hinge mechanism can move so that the second shell 100b and the third shell 100c are relatively folded or unfolded, thereby realizing the flattening and closing of the display module 11 arranged on the second shell 100b and the third shell 100c.
[0094] A foldable electronic device can unfold into a flattened state, fold into a closed state, or be in an intermediate state between the flattened and closed states. A foldable electronic device has at least two states: a flattened state and a closed state. In some cases, it may further include a third state, an intermediate state between the flattened and closed states. Intermediate states are not unique; they can be any one or more states between the flattened and closed states.
[0095] Figure 1 illustrates a three-screen foldable electronic device. The electronic device involved in the embodiments of the present application can also be a device with more screens, such as a four-screen foldable electronic device, a five-screen foldable electronic device, etc.
[0096] Among foldable electronic devices, multi-folding options are increasingly popular, such as the tri-fold electronic device shown in Figure 1. When the electronic device is in the folded (or closed) state, as shown in Figure 1, the non-bending area B1 of the display module is exposed. To enhance the ability of this exposed non-bending area to resist external damage, the thickness of this non-bending area B1 can be increased to improve rigidity and strength.
[0097] As shown in FIG. 2 , the display module 11 may include a support plate (bracket) 111 , a display panel (panel) 112 and a cover plate 110 .
[0098] The support plate 111 and the cover plate 110 are arranged on opposite sides of the display screen 112. The support plate 111 is located on the back side of the display screen 112 and serves as a supporting structure for supporting the display screen 112; the cover plate 110 is located on the display surface side of the display screen 112 and is used to protect the display screen 112 and reduce the chance of the display screen 112 being damaged.
[0099] The display surface of the display screen 112 is: the side of the display screen 112 used to display the image to the user. The back of the display screen 112 refers to the side opposite to the display surface of the display screen 112. The back of the display screen 112 can also be the side away from the display surface.
[0100] As shown in FIG2 , since the various film layer structures in the display module 11 are connected together and are in the form of a sheet-like integral structure, for example, the protective layer 114 in the cover plate 110 is a continuous integral structure in each non-bending area and each bending area, and the thickness of each area is the same. The display cover plate 113 in the cover plate 110 is similar, and the thickness of each area is the same. When it is necessary to increase the thickness of the non-bending area B1 in the display module, the thickness of other areas (such as the bending area A1, the non-bending area B2, the bending area A2, and the non-bending area B3) will also increase accordingly, resulting in a larger thickness of the entire device when closed.
[0101] Even if the stiffness of the non-bending area B1 is improved by increasing the thickness of the display module 11, the thicker screen will affect the bending performance of the bending area A1 and the bending area A2, increase the rebound force of the bending area A1 and the bending area A2, and reduce the user experience.
[0102] This application provides some display module embodiments that can not only improve the rigidity of the exposed non-bending area, but also will not weaken the bendability of the bending area.
[0103] Figure 3 is a structural diagram of a display module according to an embodiment of the present application. Display module 11 includes a support plate (bracket) 111, a display panel (panel) 112, and a cover plate 110. Support plate 111 and cover plate 110 are disposed on opposite sides of display panel 112. Support plate 111 is located on the back side of display panel 112 and serves as a support structure for supporting display panel 112. Cover plate 110 is located on the display surface side of display panel 112 and protects display panel 112.
[0104] The display screen 112 in the display module 11 includes: a first non-bending portion, a second non-bending portion, a third non-bending portion, a first bending portion, and a second bending portion; the first bending portion connects the first non-bending portion and the second non-bending portion, and the second bending portion connects the second non-bending portion and the third non-bending portion.
[0105] The cover plate 110 in the display module 11 includes a first non-bending area, a second non-bending area and a third non-bending area, a first bending area connecting the first non-bending area and the second non-bending area, and a second bending area connecting the second non-bending area and the third non-bending area.
[0106] The first non-bending portion of the display screen 112 corresponds to the first non-bending area of the cover plate 110, the first bending portion of the display screen 112 corresponds to the first bending area of the cover plate 110, the second non-bending portion of the display screen 112 corresponds to the second non-bending area of the cover plate 110, the second bending portion of the display screen 112 corresponds to the second bending area of the cover plate 110, and the third non-bending portion of the display screen 112 corresponds to the third non-bending area of the cover plate 110.
[0107] The first bending region, the first bending portion, the second bending region and the second bending portion can all be bent along a bending line to switch between an expanded state and a closed state.
[0108] FIG3 takes a three-screen folding as an example. In other examples, more bending areas and non-bending areas can be added on the basis of the structure shown in FIG3 to form electronic devices such as a four-screen folding or a five-screen folding.
[0109] As shown in FIG3 , the thickness of the first non-bending region of the cover plate 110 is d1 , and the thickness of the second non-bending region is d2 . The thickness d1 is not equal to the thickness d2 . For example, the thickness d1 may be greater than the thickness d2 .
[0110] Figure 4 is a structural diagram of another display module according to an embodiment of the present application. Similar to Figure 3, the thickness of the first non-bending region of the cover plate 110 is d1, and the thickness of the second non-bending region is d2. Thickness d1 and thickness d2 are not equal, but are greater than thickness d2.
[0111] Figure 5 is a structural diagram of another display module according to an embodiment of the present application. Similar to Figures 3 and 4, in the cover plate 110, the thickness d1 of the first non-bending region is not equal to the thickness d2 of the second non-bending region, and the thickness d1 is greater than the thickness d2.
[0112] In some examples, the thickness dimension involved in the embodiments of the present application refers to: the dimension along the stacking direction (P direction) of multiple film layers as shown in FIG3 .
[0113] In the three different examples of the display module 11 shown in Figures 3, 4 and 5, the thickness d4 of the first bending area of the cover plate 110 is not constant, but gradually decreases along the direction away from the first non-bending area, that is, from the first non-bending area to the second non-bending area, so that the thickness d2 is smaller than the thickness d1.
[0114] As shown in FIG3 to FIG5 , in the cover plate 110 , the first non-bending area is a thick area, the second non-bending area is a thin area, and the first bending area connected between the first non-bending area and the second non-bending area is a thin-to-thick transition area.
[0115] The three different examples of the display module 11 shown in FIG3 , FIG4 and FIG5 have the following differences:
[0116] In the cover plate 110 of Figure 3 , the second bending region has a thickness of d5, and the third non-bending region has a thickness of d3. Thicknesses d2, d5, and d3 are equal. The first non-bending region is a thick region, the first bending region is a thick-to-thin transition region, and the second non-bending region, the second bending region, and the third non-bending region are thin regions of equal thickness.
[0117] Compared to Figure 3 , in the example shown in Figure 4 , not only is the thickness d4 of the first bending region not constant, but the thickness d2 of the second non-bending region is also not constant. In some examples, the thickness of the first bending region and the second non-bending region of the cover plate 110 gradually decreases as it moves away from the first non-bending region, thereby masking the visual effect of uneven thickness across the display module.
[0118] In FIG4 , the thicknesses of the second bending region and the third non-bending region of the cover plate 110 are equal, that is, the thickness d5 is equal to the thickness d3 .
[0119] In FIG4 , the first non-bending region is a thick region, the first bending region and the second non-bending region are thick-thin transition regions, and the second bending region and the third non-bending region are thin regions with equal thickness.
[0120] Compared to Figures 3 and 4 , in Figure 5 , not only are the thicknesses of the first bending region and the second non-bending region of cover plate 110 not constant, but the thicknesses of the second bending region and the third non-bending region of cover plate 110 are also not constant. As one moves away from the first non-bending region, the thicknesses of the first, second, third, and third non-bending regions of cover plate 110 gradually decrease. This further masks the visual effect of uneven thickness across the display module.
[0121] Figure 6 is a structural diagram of the display module 11 given in the embodiment of the present application of Figure 3 after bending. The thickness of the first non-bending area that is exposed (visible to the user when folded) is greater than the thickness of the second non-bending area that is not exposed (invisible to the user when folded). The first bending area connected to the exposed first non-bending area is designed to have an unequal thickness structure. Even if the thickness of the first non-bending area is increased in order to improve the rigidity and strength of the first non-bending area, it will not affect the bendability of the bending area. The thickness of other areas will not be increased either. When the whole machine is in a folded state, the thickness of the closed state will not be significantly increased.
[0122] In some examples, the bending regions illustrated in Figures 3 through 5 can form an inner fold or an outer fold. For example, in the closed state shown in Figure 6, the first bending region forms an outer fold, and the second bending region forms an inner fold. The first non-bending region is exposed and visible to the user, while the second and third non-bending regions are opposite and invisible to the user.
[0123] As shown in FIG6 , the outer folding area is where the display screen of the display module 11 is still visible to the user during the folding process and in the closed state, and the user can also perform some operations on the display module 11 in the closed state. Alternatively, the display surface side of the display module 11 is visible to the user.
[0124] As shown in Figure 6 , the inner folding area refers to the area where the display screen is located on the inner side of the electronic device during the transition from the flattened state to the closed state, and when the electronic device is in the closed state. In other words, during the folding process, the display screen gradually becomes invisible to the user until, in the closed state, the display module 11 is completely concealed between the two housings. The display surface of the display module 11 is concealed and is not visible to the user.
[0125] As shown in Figure 7, Figure 7 is a structural diagram of a display module provided in an embodiment of the present application, wherein the cover plate 110 may include a display cover plate 113 and a protective layer 114. The display cover plate 113 is disposed on the display surface side of the display screen 112, and the protective layer 114 is disposed on the side of the display cover plate 113 away from the display screen 112. Both the display cover plate 113 and the protective layer 114 are light-transmissive. Light transmitted from the display surface of the display screen 112 can pass through the display cover plate 113 and the protective layer 114 and be received by the user.
[0126] In some usage scenarios, when the protective layer 114 is damaged or falls off, the display cover 113 can still protect the display screen 112 .
[0127] Of course, in some other examples, the cover plate 110 may further include other film layer structures, or the cover plate 110 includes one of the display cover plate 113 and the protective layer 114 .
[0128] In the embodiment of the present application, the display screen (panel) 112 may be a flexible display screen, and the cover plate 110 may be a flexible structure to meet folding requirements.
[0129] The display screen 112 can be used to display information and provide an interactive interface for the user. In various embodiments of the present application, the display screen 112 can be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a microorganic light-emitting diode (OLED) display screen, a quantum dot light-emitting diode (QLED) display screen, etc. In the example shown in FIG7 , the thickness of the display cover plate 113 located in the first non-bending region is greater than the thickness located in the second non-bending region, and the thickness of the display cover plate 113 located in the first bending region gradually decreases as it moves away from the first non-bending region.
[0130] In FIG. 7 , the thickness of the protection layer 114 in each bending region and each non-bending region is equal.
[0131] Figure 8 is a structural diagram of another display module according to an embodiment of the present application. In this structure, the thickness of the protective layer 114 in the first non-bending region is greater than that in the second non-bending region, and the thickness of the protective layer 114 in the first bending region gradually decreases as it moves away from the first non-bending region.
[0132] FIG. 8 shows that the thickness of the cover plate 113 in each bending region and each non-bending region is equal.
[0133] Figure 9 is a structural diagram of another display module according to an embodiment of the present application. Compared to Figure 8 , in this structure, the thickness of the first bending region and the thickness of the second non-bending region of the protective layer 114 gradually decrease as they move away from the first non-bending region, thereby widening the width of the thin-to-thick transition zone of the protective layer 114.
[0134] Figure 10 is a structural diagram of another display module according to an embodiment of the present application. Compared to Figures 8 and 9, in this example, the thickness of the first bending region, the second non-bending region, the second bending region, and the third non-bending region of the protective layer 114 gradually decrease as they move away from the first non-bending region. This further widens the width of the thin-to-thick transition zone of the protective layer 114.
[0135] 8 to 10 , the protective layer 114 is designed as a structure with uneven thickness. In other examples, the uneven thickness transition zone can be set in other film structures, for example, in the display cover 113, the structure shown in FIG8 to 10 can also be used.
[0136] In some examples provided in this application, as shown in FIG11 , the display cover 113 or the protective layer 114 may include: a substrate 11D and a buffer layer 11B.
[0137] The substrate 11D and the buffer layer 11B can be connected by an adhesive layer 11C, and the adhesive layer 11A connects these stacked film layers to other layer structures. In some examples, when FIG. 11 shows a protective layer 114, the adhesive layer 11A can be used to connect the structure including the substrate 11D, the adhesive layer 11C, and the buffer layer 11B to the display cover 113.
[0138] Among some selectable materials, the substrate 11D may be made of at least one of polyethylene terephthalate (PET), polyimide (PI), and transparent polyimide (CPI).
[0139] In some examples, the buffer layer 11B is an elastomeric film material, and the elastic modulus of the buffer layer 11B is smaller than the elastic modulus of the substrate 11D. The buffer layer 11B can be made of at least one of thermoplastic polyurethane elastomer TPU, thermoplastic polyamide elastomer TPAE, and other elastomeric film materials.
[0140] The adhesive layer 11A and the adhesive layer 11C may be made of at least one of an optically clear adhesive (OCA), an optically clear resin (OCR), an acrylic resin, an epoxy resin, and the like.
[0141] Referring to Figure 11 , in this embodiment, the buffer layer 11B in the first bending region is designed to have a unequal thickness. The thickness of the buffer layer 11B in the first bending region gradually decreases as it moves away from the first non-bending region, creating a transition zone between thick and thin regions for the protective layer 114 or display cover 113 in the first bending region.
[0142] 11 , the thickness of substrate 11D may be 25 μm to 75 μm, and the thickness of adhesive layer 11A and adhesive layer 11C may be 25 μm to 50 μm.
[0143] The thickness of the buffer layer 11B in the first non-bending region is 75 μm to 150 μm, and the thickness of the buffer layer 11B in the second non-bending region, the second bending region, and the third non-bending region is 25 μm to 75 μm.
[0144] Figure 12 illustrates another structural example of a display cover 113 or protective layer 114 according to an embodiment of the present application. In this example, the substrate 11D located in the first bend region is designed to have varying thicknesses. The thickness of the substrate 11D in the first bend region gradually decreases as it moves away from the first non-bend region, creating a transitional zone between the protective layer 114 and display cover 113 located in the first bend region.
[0145] Figure 13 shows the structure of another display cover plate 113 or protective layer 114 according to an embodiment of the present application. Compared to Figure 12 , not only is the buffer layer 11B in the first bending region designed with uneven thickness, but the buffer layer 11B in the second non-bending region is also designed with uneven thickness, thereby reducing the visual effect of uneven thickness across the entire display module.
[0146] Figure 14 illustrates another embodiment of the present invention, illustrating the structure of a display cover plate 113 or protective layer 114. In some examples, the buffer layer 11B is relatively thick, for example, up to 100 μm. Due to the thick buffer layer, the strain generated on the upper and lower surfaces of the display module when it is bent easily enters the plastic deformation stage.
[0147] When the display module is bent, in order to weaken the strain generated on the upper and lower surfaces of the display module, it enters the plastic deformation stage and improves the bendability. In some examples, as shown in Figure 14, the buffer layer 11B includes a first buffer layer 11B1 and a second buffer layer 11B2. The first buffer layer 11B is a structure of equal thickness, and the second buffer layer 11B2 located in the first bending area is designed to have an uneven thickness structure. The second buffer layer 11B2 with uneven thickness is farther away from the display screen than the first buffer layer 11B1 with uniform thickness, that is, closer to the interface that the user can see; in other examples, the first buffer layer 11B1 with uniform thickness can also be closer to the interface that the user can see than the second buffer layer 11B2 with uneven thickness.
[0148] 14 , the first buffer layer 11B1 is connected to the second buffer layer 11B2 via an adhesive layer 11E, and the second buffer layer 11B2 is connected to the substrate 11D via an adhesive layer 11C.
[0149] Figure 15 is a structural diagram of another display cover plate 113 or protective layer 114 according to an embodiment of the present application. Among the possible process options, a coating process can be used to bond the buffer layer 11B to the substrate 11D. The adhesive layer connecting the buffer layer 11B and substrate 11D can be removed, reducing the thickness of the entire display module without compromising the rigidity of the non-bending region or the bendability of the bending region.
[0150] The material of the buffer layer 11B in the example of FIG15 can be selected from at least one of thermoplastic polyurethane elastomer, silicone gel, and shear thickening material.
[0151] Referring to FIG. 15 , in this example, the buffer layer 11B located in the first bending region is designed to have an uneven thickness structure, and the thickness of each region of the substrate 11D is equal.
[0152] Figure 16 is a structural diagram of another display cover plate 113 or protective layer 114 according to an embodiment of the present application. In some alternative processes, a coating process can be used to bond the buffer layer 11B to the substrate 11D. In this example, the buffer layer 11B can be made of an adhesive material, such as optically clear adhesive (OCA). This buffer layer 11B is not only an elastomeric film but also serves as a connector, eliminating the need for adhesive layer 11A. This can further reduce the thickness of the display module.
[0153] Referring to FIG. 16 , in this example, the buffer layer 11B located in the first bending region is designed to have an uneven thickness structure, and the thickness of each region of the substrate 11D is equal.
[0154] In order to improve the rigidity of the exposed non-bending area without weakening the bendability of the bending area, the present application also provides some possible structures, which are as follows:
[0155] Figure 17 is a structural diagram of a display module according to an embodiment of the present application. In the cover plate 110 of the display module 11, the elastic modulus in the first non-bending region is greater than the elastic modulus in the first bending region. The cover plate 110 includes a hard region with a higher elastic modulus and a soft region with a lower elastic modulus.
[0156] In some examples, when the cover plate 110 includes a display cover plate or a protective layer, the hard region and the soft region can be provided in at least one of the display cover plate and the protective layer. For example, Figure 18 is a structural diagram of a display cover plate 113 or protective layer 114 according to an embodiment of the present application. The display cover plate 113 or protective layer 114 includes a substrate 11D and a buffer layer 11B, which are connected by an adhesive layer 11C.
[0157] As shown in Figure 18 , buffer layer 11B includes a hard region 11B01 (also called the first portion) and a soft region 11B02 (also called the second portion). The elastic modulus of hard region 11B01 is greater than that of soft region 11B02. Hard region 11B01 is located in the first non-bending region, while soft region 11B02 can be located in at least one of the first bending region and the second bending region.
[0158] In Figure 18, the hard region 11B01 and the soft region 11B02 are connected together as a single unit. In some alternative process steps, a buffer layer material can be first coated on the substrate and then cured in different regions using UV (ultraviolet light) to produce buffer materials with varying hardness. In other alternative process steps, the buffer layer material can be heated in different regions to produce sections with different elastic moduli, thereby creating hard and soft regions.
[0159] The buffer layer 11B is divided into a hard area 11B01 and a soft area 11B02 with different elastic moduli. The hard area 11B01 is located in the first non-bending area, which can improve the stiffness of the first non-bending area. The soft area 11B02 with a smaller elastic modulus is located in the bending area to ensure that the bending area has better bendability.
[0160] In FIG18 , the elastic modulus of the buffer layer 11B (which may be called the third portion) located in the second non-bending region and the third non-bending region may be smaller than the elastic modulus of the hard region 11B01 and larger than the elastic modulus of the soft region 11B02 .
[0161] In some examples, to improve the stiffness of the second and third non-bending regions, the elastic modulus of the buffer layer 11B in the second and third non-bending regions may be equal to the elastic modulus of the hard region 11B01 .
[0162] When the elastic modulus of the buffer layer 11B located in the second non-bending area and the third non-bending area is smaller than the elastic modulus of the hard area 11B01 and larger than the elastic modulus of the soft area 11B02, the buffer material can be applied first, at which time its modulus is lower, and then cross-linked by local UV curing or heating. By controlling the UV energy or heating temperature, a lower modulus part and a higher modulus part can be obtained.
[0163] 19 is a structural diagram of another display cover 113 or protective layer 114 according to an embodiment of the present application, comprising a substrate 11D and a buffer layer 11B, which are connected via an adhesive layer 11C.
[0164] In this example, buffer layer 11B includes a hard portion 11B11 with a larger elastic modulus and a soft portion 11B12 with a smaller elastic modulus, which are spliced together. Hard portion 11B11 is located in the first non-bending region, and soft portion 11B12 is located in at least one of the first bending region and the second bending region.
[0165] In some examples, as shown in Figure 19, an adhesive layer 11B13 can be used to join the hard portion 11B11 and the soft portion 11B12 together. For example, when the adhesive layer 11C is applied to one side of the buffer layer 11B, the colloid can overflow into the gap between the hard portion and the soft portion, bonding the hard portion and the soft portion together.
[0166] 19 , in order to improve the stiffness of the second and third non-bending regions, the elastic modulus of the buffer layer 11B located in the second and third non-bending regions may be equal to the elastic modulus of the hard portion.
[0167] In some other examples, the elastic modulus of the buffer layer 11B located in the second non-bending region and the third non-bending region may be smaller than the elastic modulus of the hard portion and larger than the elastic modulus of the soft portion.
[0168] In the example of FIG19 , the material of the hard part 11B11 includes at least one of polyethylene terephthalate (PET) and transparent polyimide (CPI), etc. The material of the soft part 11B12 includes at least one of thermoplastic polyurethane elastomer (TPU) and thermoplastic polyamide elastomer (TPAE), etc.
[0169] Figure 20 shows the structure of another display cover 113 or protective layer 114 according to an embodiment of the present application. The buffer layer 11B comprises a first buffer layer 11B1 and a second buffer layer 11B2. The first buffer layer 11B1 includes a hard region 11B01 with a higher elastic modulus and a soft region 11B02 with a lower elastic modulus. The second buffer layer 11B2 has a unequal thickness design in the first bend region. This embodiment combines a unequal buffer layer thickness design with a unequal elastic modulus design.
[0170] When the display module is folded and the first non-bending area is exposed, the first bending area connecting the first non-bending area and the second non-bending area must have sufficient resistance to external impact. For example, if the closed electronic device is dropped, the first bending area may be damaged by the impact of the hinge mechanism on one side and the ground.
[0171] The embodiments of the present application provide some new display modules 11. As shown in FIG21 , a buffer pad 127 is provided on the side of the support plate 111 away from the display screen 112. The buffer pad 127 is provided at a position of the support plate 111 opposite to the first bending area.
[0172] In some examples, in order to improve the bendability of the support plate 111 , a hollow structure 111 a is provided in a portion opposite to the first bending region, and the buffer pad 127 is disposed at a position opposite to the hollow structure 111 a .
[0173] The buffer pad 127 may be a one-layer film structure, or a multi-layer film structure.
[0174] For example, the buffer pad 127 can be made of at least one of stainless steel SUS, thermoplastic polyurethane elastomer TPU elastomer, porous foam Foam material, PET film material, and the like.
[0175] Figure 22 is a structural diagram of another display module according to an embodiment of the present application. In this embodiment, a buffer pad 127 is disposed within the support plate 111. For example, a groove can be provided within the support plate 111, and the buffer pad 127 can be disposed within the groove, with the groove being located opposite the first bending region.
[0176] 23 is a structural diagram of another display module according to an embodiment of the present application. In this embodiment, a buffer pad 127 is provided on a hinge mechanism 200 located on one side of the display module.
[0177] As shown in FIG. 21 to FIG. 23 , since the buffer pad 127 is included, when the first bending region is impacted by an external force, the buffering effect of the buffer pad 127 can reduce the degree of damage to the display module.
[0178] Figure 24 is a structural diagram of another display module according to an embodiment of the present application. In this structure, not only is the display cover plate 113 located in the first bending region designed with uneven thickness, but a cushioning pad 127 is also provided on the side of the support plate 111 away from the display screen 112. This not only increases the rigidity of the exposed, non-bending portion, but also maintains the bendability of the bending portion. Furthermore, it reduces damage to the bending portion of the display module, thereby improving the performance of the display module.
[0179] In some other examples, various regions of the protection layer 114 may be designed to have unequal thickness structures.
[0180] As shown in Figure 25 , the cover plate (e.g., display cover, protective layer) located on the display surface side of display screen 112 is designed with a structure having varying elastic moduli, as shown in Figures 17 to 20 . Furthermore, a buffer pad 127 is positioned on support plate 111 opposite the first bending region. This not only optimizes the bendability of the display module's bending portion, but also enhances its resistance to impact and compression.
[0181] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
[0182] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.
Claims
1. A display module, characterized in that: include: Display screen; a cover plate, arranged on a display surface side of the display screen, the cover plate comprising a first non-bending area, a second non-bending area, a third non-bending area, a first bending area, and a second bending area, the first bending area connecting the first non-bending area and the second non-bending area, the second bending area connecting the second non-bending area and the third non-bending area, and the first bending area and the second bending area both being able to be bent along a bending line to switch between an expanded state and a closed state; The thickness of the first non-bending region is not equal to the thickness of the second non-bending region.
2. The display module according to claim 1, characterized in that: The thickness of the first non-bending region is greater than the thickness of the second non-bending region.
3. The display module according to claim 2, characterized in that: The cover plate comprises: a first substrate and a first buffer layer, wherein the first buffer layer is closer to the display screen than the first substrate; The thickness of the first substrate in the first non-bending area is greater than the thickness of the first substrate in the second non-bending area, and / or; The thickness of the first buffer layer located in the first non-bending area is greater than the thickness of the first buffer layer located in the second non-bending area.
4. The display module according to claim 3, characterized in that: From the first non-bending area to the second non-bending area, the thickness of the first buffer layer located in the first bending area gradually decreases.
5. The display module according to claim 3 or 4, characterized in that: The first buffer layer is disposed on a surface of the first substrate facing the display screen.
6. The display module according to any one of claims 3 to 5, characterized in that: The cover plate also includes: a second substrate; The second substrate is disposed between the first buffer layer and the display screen, and the first buffer layer is disposed on a surface of the second substrate facing away from the display screen.
7. The display module according to any one of claims 3 to 6, characterized in that: The cover plate also includes: a second buffer layer, the second buffer layer comprising a first portion and a second portion; The first portion of the second buffer layer is located in the first non-bending region, the second portion of the second buffer layer is located in the first bending region, and the elastic modulus of the first portion of the second buffer layer is greater than the elastic modulus of the second portion of the second buffer layer.
8. The display module according to claim 7, characterized in that: The first portion of the second buffer layer and the second portion of the second buffer layer are an integrally formed structure; or, The first portion of the second buffer layer and the second portion of the second buffer layer are connected by an adhesive layer.
9. The display module according to claim 7 or 8, characterized in that: The second buffer layer further includes a third portion, and the third portion of the second buffer layer is located in the second non-bending area; The elastic modulus of the third portion of the second buffer layer is smaller than the elastic modulus of the first portion of the second buffer layer, and larger than the elastic modulus of the second portion of the second buffer layer.
10. The display module according to any one of claims 1 to 9, characterized in that: From the first non-bending area to the second non-bending area, the thickness of the first bending area gradually decreases.
11. The display module according to any one of claims 1 to 10, characterized in that: From the first bending area to the second bending area, the thickness of the second non-bending area gradually decreases.
12. The display module according to any one of claims 1 to 11, characterized in that: The thickness of the third non-bending region is smaller than the thickness of the first non-bending region.
13. The display module according to any one of claims 1 to 12, characterized in that: From the first non-bending area to the third non-bending area, the thicknesses of the first bending area, the second non-bending area, the second bending area and the third non-bending area gradually decrease.
14. The display module according to any one of claims 1 to 13, characterized in that: The display module also includes: A support plate, the support plate being arranged on a side of the display screen away from a display surface; A buffer pad is arranged on a side of the support plate away from the display screen, and the buffer pad is located at a position corresponding to the first bending area.
15. The display module according to any one of claims 1 to 13, characterized in that: The display module also includes: A support plate, the support plate being arranged on a side of the display screen away from a display surface; A buffer pad is embedded in a position of the support plate corresponding to the first bending area.
16. The display module according to any one of claims 1 to 15, characterized in that: When the first bending area is in the closed state, the display surface of the display screen is away from the center of the arc structure formed by the display module relative to the back surface of the display screen.
17. A display module, characterized in that: include: Display screen; a cover plate, arranged on a display surface side of the display screen, the cover plate comprising a first non-bending area, a second non-bending area, a third non-bending area, a first bending area, and a second bending area, the first bending area connecting the first non-bending area and the second non-bending area, the second bending area connecting the second non-bending area and the third non-bending area, and the first bending area and the second bending area both being able to be bent along a bending line to switch between an expanded state and a closed state; The elastic modulus of the first non-bending region is not equal to the elastic modulus of the first bending region.
18. The display module according to claim 17, characterized in that: The elastic modulus of the first non-bending region is greater than the elastic modulus of the first bending region.
19. The display module according to claim 18, characterized in that: The cover plate comprises: A substrate and a buffer layer, wherein the buffer layer is closer to the display screen than the substrate; The buffer layer includes a first portion and a second portion; The first portion of the buffer layer is located in the first non-bending region, the second portion of the buffer layer is located in the first bending region, and the elastic modulus of the first portion of the buffer layer is greater than the elastic modulus of the second portion of the buffer layer.
20. The display module according to claim 19, characterized in that: The first part of the buffer layer and the second part of the buffer layer are an integrally formed structure; or, The first portion of the buffer layer and the second portion of the buffer layer are connected via an adhesive layer.
21. The display module according to claim 19 or 20, characterized in that: The buffer layer further includes a third portion, and the third portion of the buffer layer is located in the second non-bending area; The elastic modulus of the third portion of the buffer layer is smaller than the elastic modulus of the first portion of the buffer layer, and larger than the elastic modulus of the second portion of the buffer layer.
22. The display module according to any one of claims 17 to 21, characterized in that: The display module also includes: A support plate, the support plate being arranged on a side of the display screen away from a display surface; A buffer pad is arranged on a side of the support plate away from the display screen, and the buffer pad is located at a position corresponding to the first bending area.
23. The display module according to any one of claims 17 to 21, characterized in that: The display module also includes: A support plate, the support plate being arranged on a side of the display screen away from a display surface; A buffer pad is embedded in a position of the support plate corresponding to the first bending area.
24. The display module according to any one of claims 17 to 23, characterized in that: When the first bending area is in the closed state, the display surface of the display screen is away from the center of the arc structure formed by the display module relative to the back surface of the display screen.
25. An electronic device, characterized in that: include: case; The display module according to any one of claims 1 to 24; The display module is arranged on the housing.