Support member, display screen assembly and electronic device

Abstract

Provided in the present application are a support member, a display screen assembly and an electronic device. The support member is arranged on a backlight side of a display screen, and the support member comprises: a first support layer and a second support layer which are stacked. The first support layer is arranged close to the display screen, and the first support layer is made of a first material. The second support layer comprises: a first support part, a second support part and a bending part, the first support part, the bending part and the second support part being distributed in the direction perpendicular to the thickness direction of the support member, and the bending part being located between the first support part and the second support part. The bending part is made of the first material, and the first support part and the second support part are made of a second material, the relative density of the first material being greater than the relative density of the second material. Thus, a balance can be made between the support performance and the lightness and thinness of the support member.

Description

Supports, display assemblies, and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on October 31, 2023, with application number 202311443388.8 and application name “Support, display assembly and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of display screens, and in particular to a support member, a display screen assembly, and an electronic device. Background Art

[0003] With the continuous advancement of display technology, foldable display terminals are becoming a trend in future mobile electronic products. These terminals include at least one flexible display. The performance of each component directly impacts the performance of the display. To maintain the flatness and rigidity of flexible displays, one or more layers of metal are typically placed underneath the display as support.

[0004] Existing support components are primarily made of metals: stainless steel, copper alloys, titanium alloys, and aluminum alloys. These materials are dense and heavy. As consumers demand lighter electronic devices, they also demand lighter support components. To address this, fiber composite materials, such as carbon fiber, glass fiber, aramid fiber, and ceramic fiber, can be used for support components. These materials have low density and offer significant weight savings. However, the stiffness of fiber composites combined with resins is poor, requiring increased thickness to compensate, hindering product thinness.

[0005] However, existing supports cannot meet the requirements of lightness and reliable support.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a support member, a display screen assembly, and an electronic device, which are intended to improve the problem that existing support members cannot achieve both lightness and supporting performance.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] In a first aspect, the present application provides a support member disposed on the backlight side of a display screen. The support member comprises: a first support layer and a second support layer stacked together. The first support layer is disposed proximate the display screen and is made of a first material. The second support layer comprises: a first support portion, a second support portion, and a bend portion. The first, second, and third support portions are arranged perpendicular to the thickness of the support member. The bend portion is located between the first and second support portions. The bend portion is made of the first material, and the first and second support portions are made of a second material. The relative density of the first material is greater than that of the second material. Thus, the high relative density of the first material provides support for the display screen, facilitating the flatness and rigidity of the screen. The first and second support portions of the second support layer are made of the second material, which has a lower relative density. This reduces the weight of the first and second support portions, thereby reducing the weight of the second support layer. The bend portion is made of the first material, which has a higher relative density, enabling multiple bends and improving bending performance.

[0010] In addition, from the overall perspective, the non-bending area of ​​the support member forms a laminated structure of a first material with high relative density and a second material with low relative density. The high relative density support layer and the low relative density support layer are alternately arranged along the z direction. The high relative density support layer has better supporting performance, which can improve the flatness and rigidity of the flexible display and the shell, while the low relative density support layer is lighter in weight, which is conducive to the thinning of electronic equipment. In this way, by setting a laminated structure of high relative density support members and low relative density support members, the product is made thinner while ensuring the supporting performance of the support member, thereby improving the user experience. Moreover, the bending area of ​​the support member is entirely made of the first material with high relative density, which has a high density and can retain the modulus and strength of the steel, so that the bending area has high strength and elastic deformation capacity, so that the bending area can withstand multiple bending, improve the reliability of the bending area, and extend the service life of the support member. The use of this first material is conducive to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display, and can better support the flexible display.

[0011] In an optional implementation, the relative density of the first material is greater than or equal to 97%, and the relative density of the second material is 10%-95%, thereby making the relative density of the first material greater than the relative density of the second material.

[0012] In one optional implementation, the support member is integrally formed by 3D printing or powder metallurgy. This integral molding method strengthens the bonding between the first and second support layers, and between the support portion and the bend in the second support layer, thereby improving the strength and stability of the connection between the first and second support layers, and between the support portion and the bend.

[0013] In one optional implementation, the first material includes one or more of steel, titanium, aluminum, amorphous alloys, metal-based composite materials, and plastic-based composite materials. This allows for a wide variety of first materials to be selected. By adjusting the relative density of the first material to achieve a high relative density, the display screen can be supported, thereby facilitating the flatness and rigidity of the screen.

[0014] In one optional implementation, the second material includes one or more of steel, titanium, aluminum, amorphous alloys, metal-based composite materials, and plastic-based composite materials. This allows for a wide variety of second materials to be selected. By adjusting the relative density of the second material to a low relative density, the average density of the support member made of the second material can be reduced, thereby reducing the weight of the support member.

[0015] In an optional implementation, the thickness of the first support layer is greater than or equal to 0.02 mm, and the thickness of the second support layer is greater than or equal to 0.03 mm. Thus, the support member adopting this structure has a lower average relative density, which reduces the weight of the support member and facilitates the thinning and lightening of electronic devices.

[0016] In an optional implementation, the support member further comprises a filling material, wherein the first support portion and the second support portion each comprise a plurality of holes, and the filling material is disposed in the plurality of holes. Thus, disposing the filling material in the holes of the first support portion and the second support portion forms a dense structure of the first support portion and the second support portion, thereby improving the support performance of the support member.

[0017] In an optional implementation, the filling material includes: a polymer material or an adhesive material. Thus, using the polymer material or the adhesive material as the filling material can improve the cushioning performance of the support member.

[0018] In an optional implementation, the support member further comprises a third support layer, disposed on a side of the second support layer away from the first support layer, the third support layer being made of the first material. Thus, disposing the third support layer on the side closer to the housing and using a relatively high-density material can further enhance the support performance of the support member.

[0019] In an optional implementation, the thickness of the first supporting layer is greater than or equal to 0.02 mm, thereby improving the supporting performance of the supporting layer.

[0020] In an optional implementation, the thickness of the support member is 0.08-0.2 mm. Thus, the support member adopting this structure has a smaller thickness and better supporting performance, achieving both portability and supporting performance.

[0021] In an optional implementation, the support member further includes a third support portion, the third support portion being disposed around the second support layer and being made of the first material. Thus, the provision of the third support portion can prevent the support portion of the second support layer from contacting the outside, thereby preventing air, moisture, and dust from the external environment from intruding into the support member, thereby better protecting the support portion.

[0022] In one optional implementation, the bent portion includes multiple through-holes. By providing through-holes extending through the bent portion, the bent portion is formed into a hollow area, which increases the elastic deformation capacity of the bent portion and reduces the tensile force exerted on the first and second support portions, thereby avoiding the problem of the first and second support portions breaking due to excessive tensile force. Furthermore, the provision of the hollow area can reduce the weight of the flexible display support, thereby reducing the weight of the electronic device.

[0023] In an optional implementation, the bending portion includes: a first bending portion and a second bending portion, and the second supporting layer further includes: a third supporting portion, and the first supporting portion, the first bending portion, the second supporting portion, the second bending portion, and the third supporting portion are distributed in a direction perpendicular to the thickness direction of the supporting member, the first bending portion is located between the first supporting portion and the second supporting portion, and the second bending portion is located between the second supporting portion and the third supporting portion. As a result, the above-mentioned support member can be used not only in dual-screen folding electronic devices, but also in triple-screen folding electronic devices, with a wider range of applications. While ensuring support performance, it achieves a lightweight and thin product, thereby improving user experience.

[0024] A second aspect of the present application provides a display assembly comprising: a flexible display; and the aforementioned support member, the support member disposed on the backlight side of the flexible display, the flexible display being connected to the first support layer. Thus, the flexible display assembly employs the aforementioned support member, thereby improving the flatness and rigidity of the flexible display, while maintaining support performance while achieving a lightweight and thin product, thereby enhancing the user experience.

[0025] In an optional implementation, the first non-bending area of ​​the flexible display screen is opposite to the first support portion; the second non-bending area of ​​the flexible display screen is opposite to the second support portion; and the bending area of ​​the flexible display screen is opposite to the bending portion; wherein the bending area is arranged between the first non-bending area and the second non-bending area. Thus, the position where the support member is opposite to the non-bending area of ​​the flexible display screen adopts a laminated structure in which high relative density support members and low relative density support members are alternately arranged. This ensures the supporting performance of the support member while achieving a lightweight product and improving the user experience. The position where the support member connects to the bending area of ​​the flexible display screen is entirely made of a high relative density material. The high density increases the modulus and strength of this position, making the portion connected to the bending area of ​​the flexible display screen have high strength and elastic deformation capacity, thereby enabling the bending area to withstand multiple bending, improving the reliability of the bending area, extending the service life of the support member, and facilitating the increase in screen lifting capacity, reducing the collision between the hinge mechanism and the flexible display screen, and better supporting the flexible display screen.

[0026] The third aspect of the present application provides an electronic device comprising: a housing and the display screen assembly described above, wherein the display screen assembly is connected to the housing. Thus, the electronic device employs the display screen assembly described above, achieving a lightweight and thin product while ensuring support performance, thereby improving user experience.

[0027] The fourth aspect of the present application provides a method for preparing a support member, comprising: printing a first support layer using a 3D printing process, wherein the first support layer is made of a first material; printing a second support layer on the first support layer using a 3D printing process; the second support layer comprises: a first support portion, a second support portion and a bending portion, wherein the first support portion, the bending portion and the second support portion are distributed in a direction perpendicular to the thickness direction of the support member, the bending portion is located between the first support portion and the second support portion, the bending portion is made of the first material, the first support portion and the second support portion are made of the second material, and the relative density of the first material is greater than the relative density of the second material.

[0028] In an optional implementation, the method further includes: printing a third supporting layer on the second supporting layer using a 3D printing process, wherein the third supporting layer is made of the first material.

[0029] In an optional implementation, the support member further includes: a third support portion, the third support portion is arranged around the second support layer, and the third support portion is made of the first material.

[0030] In an optional implementation, the first support portion and the second support portion each include a plurality of holes, and the method further includes: filling the plurality of holes with a filling material. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic diagram of the disassembled structure of an electronic device provided in an embodiment of the present application;

[0032] FIG2 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0033] FIG3 is a schematic structural diagram of another electronic device provided in an embodiment of the present application;

[0034] FIG4 is a cross-sectional view of an electronic device provided in an embodiment of the present application;

[0035] FIG5 is a schematic structural diagram of a support member;

[0036] FIG6 is a schematic structural diagram of another support member;

[0037] FIG7 is a schematic diagram of a connection method of a support member;

[0038] FIG8 is a schematic diagram of another connection method of the support member;

[0039] FIG9 is a schematic structural diagram of a support member provided in an embodiment of the present application;

[0040] FIG10 is a schematic structural diagram of another support member provided in an embodiment of the present application;

[0041] FIG11 is a schematic structural diagram of another support member provided in an embodiment of the present application;

[0042] FIG12 is a schematic structural diagram of a display screen assembly provided in Example 1 of the present application;

[0043] FIG13 is a flow chart of a method for preparing a support member provided in Example 1 of the present application;

[0044] Figures 14 and 15 are schematic diagrams of the product structure after executing the steps shown in Figure 13;

[0045] FIG16 is a flow chart of another method for preparing a support member provided in Example 1 of the present application;

[0046] FIG17 is a schematic diagram of the product structure after executing the steps shown in FIG16;

[0047] FIG18 is a schematic structural diagram of a display screen assembly provided in Example 2 of the present application;

[0048] FIG19 is a flow chart of a method for preparing a support member provided in Example 2 of the present application;

[0049] FIG20 is a schematic diagram of the product structure after executing the steps shown in FIG19;

[0050] FIG21 is a schematic structural diagram of a display screen assembly provided in Example 3 of the present application;

[0051] FIG. 22 is another schematic diagram of the product structure after executing step S102 shown in FIG. 13 . DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0053] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0054] In addition, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0055] The present application provides an electronic device. The electronic device may be a tablet computer, a mobile phone, an e-reader, a remote control, a personal computer (PC), a laptop computer, a personal digital assistant (PDA), an in-vehicle device, an Internet-connected television, a wearable device, a television, or other products with a display interface, as well as smart display wearable products such as smart watches and smart bracelets. The present application does not impose any particular restrictions on the form of the electronic device.

[0056] Exemplarily, the electronic device may be a device with a foldable screen, including but not limited to a foldable mobile phone, a foldable tablet computer, etc.

[0057] For the convenience of description, the following embodiments are all described by taking a mobile phone as an example of an electronic device.

[0058] FIG1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. As shown in FIG1 , the electronic device 1 includes a display module 10 and a housing (or battery cover) 12. A middle frame 11 is located between the display module 10 and the housing 12.

[0059] The display module 10 is used to display images.

[0060] The display module 10, the middle frame 11, and the housing 12 can be arranged in different layers in the thickness direction of the electronic device. These layers can be parallel to each other. The plane in which each layer is located can be called the XY plane, and the direction perpendicular to the XY plane can be called the Z direction. In other words, the display module 10, the middle frame 11, and the housing 12 can be arranged in layers in the Z direction.

[0061] The display module 10 can be electrically connected to a PCB disposed on the middle frame 11 by passing a flexible printed circuit (FPC) through the middle frame 11 as shown in FIG1 . This allows the PCB to transmit display data to the display module 10 to control the display module 10 to display images.

[0062] The middle frame 11 is located between the display module 10 and the housing 12. The surface of the middle frame 11, facing away from the display module 10, is used to mount internal components such as the battery, printed circuit board (PCB), camera, and antenna. When the housing 12 and middle frame 11 are closed, these internal components are located between the housing 12 and the middle frame 11.

[0063] The housing 12 is connected to the middle frame 11 to form a cavity for accommodating the PCB, camera, battery and other electronic components, thereby preventing moisture and dust from entering the cavity and affecting the performance of the electronic components.

[0064] The embodiments of the present application do not limit the structure of the mobile phone. In some embodiments of the present application, as shown in Figures 2 and 3, the mobile phone can be a foldable screen mobile phone, and the display module 10 includes a flexible display screen 101.

[0065] The flexible display screen 101 may be an active matrix organic light emitting diode (AMOLED) display screen.

[0066] AMOLED displays are self-luminous and do not require a backlight module (BLM). Therefore, when the base substrate of an AMOLED display is made of a flexible resin material such as polyimide (PI) or polyethylene terephthalate (PET), the AMOLED display can be bendable.

[0067] Figure 2 shows the structure of a dual-screen foldable phone, which includes a first housing 12a, a second housing 12b, a flexible display 101, and a hinge mechanism. The flexible display 101 can be continuously covered on the first and second housings 12a, 12b. The first and second housings 12a, 12b are positioned on either side of the hinge mechanism and are respectively connected to the hinge mechanism. The flexible display 101 can also be flattened and closed by the hinge mechanism.

[0068] Figure 3 shows a structural diagram of a triple-screen foldable phone. The example foldable phone is a triple-screen foldable phone. The triple-screen foldable phone may include a first housing 12a, a second housing 12b, and a third housing 12c, as well as a flexible display 101. The flexible display 101 may continuously cover the first, second, and third housings 12a, 12b, and 12c. The foldable phone may also include a first hinge mechanism and a second hinge mechanism.

[0069] The first shell 12a and the second shell 12b 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 12a and the second shell 12b are folded or unfolded relative to each other, thereby realizing the flattening and closing of the flexible display screen 101 arranged on the first shell 12a and the second shell 12b.

[0070] The second shell 12b and the third shell 12c are arranged on both sides of the second rotating shaft mechanism and are respectively connected to the second rotating shaft mechanism. The second rotating shaft mechanism can move so that the second shell 12b and the third shell 12c are relatively folded or relatively unfolded, thereby realizing the flattening and closing of the flexible display screen 101 arranged on the second shell 12b and the third shell 12c.

[0071] 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.

[0072] Figures 2 and 3 above illustrate a dual-screen and triple-screen foldable electronic device. The foldable electronic device involved in the embodiments of the present application can also be a device with more screens, such as a four-screen foldable device, a five-screen foldable device, etc.

[0073] The following uses a dual-screen foldable electronic device as an example for illustration. Figure 4 shows the structure of some exemplary electronic devices. As shown in Figure 4, to protect the flexible display 101, the electronic device also includes a support member 200. The support member 200 is disposed on the backlight side of the flexible display 101 and is used to provide reliable support for the flexible display 101.

[0074] The support member can be used in a foldable terminal as a supporting structure under a flexible display screen. For example, the support member 200 can be a bamboo book structure.

[0075] As shown in Figure 4, the housing 12 includes a first housing 12a, a second housing 12b, and a hinge mechanism 13 located between the first and second housings 12a, 12b. The first and second housings 12a, 12b can rotate along the axis OO of the hinge mechanism 13, thereby causing the display screen 102 to fold or unfold.

[0076] For example, when the included angle α between the first shell 12a and the second shell 12b is 0°, the flexible display screen 101 is in a folded state.

[0077] Alternatively, when the included angle α between the first shell 12a and the second shell 12b increases to 180°, the flexible display screen 101 is in the unfolded state.

[0078] The flexible display screen 101 includes a first non-bending area opposite to the first shell 12 a , a second non-bending area opposite to the second shell 12 b , and a bending area opposite to the hinge mechanism 13 .

[0079] The support member 200 is disposed on the backlight side of the flexible display 101, that is, between the flexible display 101 and the housing 12. In some embodiments, the support member 200 includes a first support portion 201 connected to the first non-bending region, a second support portion 202 connected to the second non-bending region, and a bending portion 203 connected to the bending region.

[0080] The embodiment of the present application does not limit the structure of the support member. In some embodiments, the support member includes a metal layer.

[0081] 5 , in the example shown in FIG5 , the support member 200 includes a metal layer, and the first support portion 201 , the second support portion 202 and the bending portion 203 are all made of metal.

[0082] In this example, the first support portion 201, the second support portion 202 and the bending portion 203 can be integrally formed, and then regular holes can be processed in the bending portion 203 by chemical etching so that the bending portion 203 can be bent repeatedly.

[0083] In some examples, the metal material may be stainless steel, copper alloy, titanium alloy, or aluminum alloy.

[0084] For example, the size of the support member 200 is 140*155 mm and the thickness is 0.15 mm.

[0085] When the support member 200 is made of stainless steel, its density is 7.9 g / cm 3 , the weight can reach 23.5g, it has high density and heavy weight.

[0086] When the support member 200 is made of titanium alloy, its density is 4.5 g / cm 3 , the weight can reach 12.8g. Although the weight is reduced compared with stainless steel, it is still heavy, and lightweight is still achieved. Compared with stainless steel, the cost is increased.

[0087] Fig. 6 is an exploded schematic diagram of some other exemplary display screen assemblies. Referring to Fig. 6 , the support member 200 includes a fiber layer.

[0088] In some examples, the material of the fiber layer can be a fiber composite material, such as carbon fiber, glass fiber, aramid fiber, ceramic fiber, etc., which is formed by winding, molding, pultrusion or other molding processes with a matrix material.

[0089] Compared with the metal layer, the fiber layer is lighter, but the fiber layer has poor stiffness. When the flexible display is repeatedly bent or unfolded, the opposite sides of the flexible display will be continuously subjected to inward compression and outward tension. This will easily lead to insufficient flatness and stiffness of the flexible display after long-term use. Among them, stiffness is called elastic modulus, which refers to the ability of a material or structure to resist elastic deformation when subjected to force. The larger the elastic modulus or stiffness, the smaller the elastic deformation, and the smaller the elastic modulus or stiffness, the greater the elastic deformation.

[0090] In some embodiments, the stiffness can be compensated by increasing the thickness of the support member, which is not conducive to the lightweight and thinness of the product.

[0091] In this example, the first support portion 201 , the second support portion 202 and the bending portion 203 are made of different materials and need to be formed separately before connecting the first support portion 201 , the second support portion 202 and the bending portion 203 .

[0092] As can be seen from Figures 7 and 8, the flexible display screen support member in the embodiment of the present application adopts a planar splicing structure, so that the flexible display screen can be bent along the direction of arrow a or arrow b in Figures 7 and 8 when in use. When the flexible display screen support member is bent along direction a in Figure 7, the first support portion 201 will be subjected to two forces at the same time, wherein the end surface of the first support portion 201 close to the flexible display screen 101 will be subjected to the compression force of the second support portion 202, and the end surface of the first support portion 201 away from the flexible display screen 101 will be subjected to the tensile force of the second support portion 202. Similarly, when the flexible display screen support member is bent along direction b in Figure 7, the second support portion 202 will be subjected to two forces at the same time, wherein the end surface of the second support portion 202 close to the flexible display screen 101 will be subjected to the compression force of the first support portion 201, and the end surface of the second support portion 202 away from the flexible display screen 101 will be subjected to the tensile force of the first support portion 201.

[0093] Among them, in order to avoid the problem of the flexible display screen support being broken when it is continuously subjected to compression and tension, in the embodiment of the present application, the bending portion 203 may include at least a partial bending area. By setting the bending area, when the flexible display screen 101 is in use, on the one hand, the bending area can reduce the tension exerted on the first support portion 201 and the second support portion 202, and on the other hand, the bending portion 203 is set between the first support portion 201 and the second support portion 202, so that when bending from the first support portion 201 to the second support portion 202, or from the second support portion 202 to the first support portion 201, the bending area on the bending portion 203 can bear part of the tension exerted on the first support portion 201 and the second support portion 202, thereby avoiding the problem of the first support portion 201 and the second support portion 202 being broken due to excessive tension.

[0094] In some examples, the bending portion 203 is made of a bendable material, such as a metal material or a soft-glue continuous fiber composite material.

[0095] The first support part 201 and the second support part 202 can both use hard-glue continuous fiber composite materials as under-screen supports. The hard-glue continuous fiber composite materials can be, for example, carbon fiber, glass fiber, Kevlar fiber, etc.

[0096] The embodiment of the present application does not limit the connection method of the first support portion 201, the second support portion 202 and the bending portion 203. In some embodiments, as shown in Figure 7, the first support portion 201, the second support portion 202 and the bending portion 203 are connected by splicing.

[0097] In other embodiments, as shown in FIG8 , the first supporting portion 201 , the second supporting portion 202 and the bending portion 203 are connected by overlapping.

[0098] However, both splicing and overlapping connection methods will produce joints, which are prone to unevenness and easily cause light and shadow to appear after being attached to the flexible display screen, affecting usage.

[0099] To this end, the present application provides an improved support member. The support member provided in the embodiments of the present application is introduced below.

[0100] Figure 9 is a schematic diagram of the structure of a support member provided by an embodiment of the present application. As shown in Figure 9, the support member includes: a first support layer 2001 and a second support layer 2002 stacked along the z direction.

[0101] The first supporting layer 2001 is connected to the display screen, and the second supporting layer 2002 is arranged on a side of the first supporting layer 2001 away from the display screen.

[0102] In some embodiments, first supporting layer 2001 is made of a first material. The relative density of the first material can be greater than or equal to 97%. Relative density refers to the percentage of actual density to theoretical density. In this embodiment, actual density is the measured density. Theoretical density refers to the density of the solid phase of the first material, i.e., the density of the first material in a non-porous state.

[0103] The first material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

[0104] In some embodiments, the thickness of the first supporting layer 2001 may be greater than or equal to 0.02 mm.

[0105] In this way, the first material has a high relative density and a certain thickness, which provides support for the display screen and is conducive to maintaining the flatness and rigidity of the screen.

[0106] The second supporting layer 2002 includes: a supporting portion and a bending portion, and the supporting portion and the bending portion are distributed along a direction (ie, x direction) perpendicular to the thickness direction (z direction) of the supporting member.

[0107] In some embodiments, the bending portion is made of a first material, and the supporting portion is made of a second material, wherein the relative density of the second material is less than that of the first material. For example, the relative density of the second material may be 10%-95%.

[0108] The second material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

[0109] In some embodiments, the thickness of the second supporting layer 2002 may be greater than or equal to 0.03 mm.

[0110] In this way, the supporting portion of the second supporting layer 2002 is made of the second material, and the relative density of the second material is relatively low. The average density of the supporting member adopting this structure is reduced, which can reduce the weight of the supporting member.

[0111] For example, taking 301 stainless steel profile as an example, the density is 8g / cm 3 In some embodiments, the thickness of the support member using the above structure is 0.08-0.2 mm, and the average density is about 4 g / cm 3 Its weight is lighter than the titanium alloy material used in the structure of Figure 5, which reduces the weight of the supporting parts and is conducive to the lightweight and thinning of electronic equipment.

[0112] The bent portion of the second support layer 2002 is made of the first material, which has a higher density and retains the modulus and strength of steel. This helps increase the screen lift, reduces collision between the hinge mechanism and the flexible display, and better supports the flexible display. When the foldable electronic device is closed, the flexible display sags. The screen lift refers to the height to which the bent portion lifts the drooping flexible display.

[0113] The supporting portion and the bending portion in the second supporting layer 2002 provided in this embodiment are made of metal materials with different characteristics. Since the relative density of the first metal material used to make the bending portion is greater than the relative density of the second metal material used to make the supporting portion, the weight of the supporting portion is lighter, which is beneficial to reducing the weight of the second supporting layer 2002. The elastic modulus of the first metal material used to make the bending portion is greater than the elastic modulus of the second metal material used to make the supporting portion, so that the bending portion that can be bent has higher strength and elastic deformation ability, so that the bending portion can withstand multiple bending, thereby improving the reliability of the bending portion and extending the service life of the support component.

[0114] The embodiment of the present application does not limit the number and position of the supporting portions and the bending portions in the second supporting layer 2002 .

[0115] In some embodiments, as shown in FIG9 , the support member is used in a dual-screen foldable electronic device. In this case, the support portion includes: a first support portion 2002a and a second support portion 2002b, with a bending portion 2002c located between the first support portion 2002a and the second support portion 2002b. As shown in FIG12 , the first support portion 2002a is disposed opposite the first non-bending region 101a of the flexible display (or opposite the first housing), the second support portion 2002b is disposed opposite the second non-bending region 101b of the flexible display (or opposite the second housing), and the bending portion 2002c is disposed opposite the bending region 101c of the flexible display (or opposite the hinge mechanism).

[0116] In this embodiment, the first supporting portion 2002a and the second supporting portion 2002b are made of the second material, and the bending portion 2002c is made of the first material.

[0117] In some embodiments, the support member is used in a three-screen foldable electronic device. In this case, the support portion includes: a first support portion, a second support portion, and a third support portion, and the bending portion includes: a first bending portion and a second bending portion, the first bending portion is located between the first support portion and the second support portion, and the second bending portion is located between the second support portion and the third support portion. The first support portion is arranged opposite to the first housing 12a shown in Figure 3, the second support portion is arranged opposite to the second housing 12b shown in Figure 3, and the third support portion is arranged opposite to the third housing 12c shown in Figure 3. The first bending portion is arranged opposite to the first rotating shaft mechanism, and the second bending portion is arranged opposite to the second rotating shaft mechanism.

[0118] In this embodiment, the first supporting portion, the second supporting portion, and the third supporting portion are made of the second material, and the first bending portion and the second bending portion are both made of the first material.

[0119] The above description uses the supporting parts of dual-screen folding electronic devices and triple-screen folding electronic devices as examples. The folding electronic devices involved in the embodiments of the present application can also be devices with more screens, such as four-screen folding, five-screen folding and other electronic devices. The structure of their supporting parts can refer to the above embodiments and will not be repeated here.

[0120] The embodiments of the present application do not limit the molding process of the support member. In some embodiments, the support member is molded by 3D printing (3D printing, 3DP).

[0121] Among them, 3D printing is a rapid prototyping technology. It uses digital model files as the basis and prints powdered metal, plastic and other adhesive materials layer by layer to form support parts.

[0122] For example, the present application also provides a method for preparing a support member, the method comprising:

[0123] S101. Print a first support layer 2001 using a 3D printing process, where the first support layer 2001 is made of a first material.

[0124] S102 . Print the second support layer 2002 on the first support layer 2001 using a 3D printing process.

[0125] The second support layer 2002 includes: a first support portion 2002a, a second support portion 2002b and a bending portion 2002c. The first support portion 2002a, the bending portion 2002c and the second support portion 2002b are distributed along a direction perpendicular to the thickness direction of the support member. The bending portion 2002c is located between the first support portion 2002a and the second support portion 2002b. The bending portion 2002c is made of a first material, and the first support portion 2002a and the second support portion 2002b are made of a second material. The relative density of the first material is greater than the relative density of the second material.

[0126] In other embodiments, the support member may be formed by powder metallurgy, wherein the powder metallurgy process includes metal injection molding, compression molding, and ceramic injection molding.

[0127] For example, metal injection molding can be performed by melting the first material and the second material respectively, injecting them into a mold using pressure, and cooling and molding them to obtain the support member.

[0128] The compression molding may be to first place the first material and the second material in powder, granular or fibrous form into a mold cavity at a molding temperature, and then close the mold and pressurize them to form and solidify them to form the support member.

[0129] Ceramic injection molding can be a process in which a molten first material and a second material are pushed into a mold by a plunger or a screw, and a support is obtained after cooling.

[0130] Therefore, the support member provided in the embodiment of the present application is formed in an integral manner, which strengthens the bonding force between the first support layer 2001, the second support layer 2002, and the support portion and the bending portion 2002c in the second support layer 2002, and is beneficial to improving the connection strength and stability between the first support layer 2001 and the second support layer 2002, and the support portion and the bending portion 2002c.

[0131] The support member adopts a structure comprising a second support layer 2002 and a first support layer 2001 stacked together. The first support layer 2001 is positioned close to the display screen and is made of a high-relative-density material, providing support for the display screen and facilitating the flatness and rigidity of the screen. The support portion and the bent portion 2002c in the second support layer 2002 are made of metal materials with different properties. The relative density of the first metal material making up the bent portion 2002c is greater than the relative density of the second metal material making up the support portion, resulting in a lighter support portion and thus reducing the weight of the second support layer 2002. Furthermore, the elastic modulus of the first metal material making up the bent portion 2002c is greater than the elastic modulus of the second metal material making up the support portion, resulting in a higher strength and elastic deformation capability for the bendable bent portion 2002c. This allows the bent portion 2002c to withstand multiple bends, improving its reliability and extending the service life of the support member.

[0132] Therefore, the support member provided in the embodiment of the present application, on the one hand, ensures the flatness and rigidity of the flexible display screen, and on the other hand, a bending portion 2002c is provided in the second supporting layer 2002, which is conducive to bending and can increase the amount of screen lifting. In addition, a support portion with relatively low density is provided in the second supporting layer 2002, which is conducive to reducing the weight of the support portion and realizing the lightweight and thin electronic device.

[0133] In some embodiments, as shown in FIG10 , the support member further includes: a third support layer 2003 , which is disposed on a side of the second support layer 2002 away from the first support layer 2001 , and is made of the first material.

[0134] In some embodiments, the thickness of the third supporting layer 2003 may be greater than or equal to 0.02 mm.

[0135] Therefore, the third supporting layer 2003 is arranged close to one side of the shell and is made of a material with a relatively high density, which can further improve the supporting performance of the supporting member.

[0136] In some embodiments, the support portion includes a plurality of holes. Thus, providing a plurality of holes in the support portion can reduce the relative density of the support portion, which is beneficial for reducing the weight of the support member and achieving a lighter and thinner electronic device.

[0137] In some embodiments, the support member further comprises: a filling material 20021, and the filling material 20021 is disposed in the plurality of holes. Thus, disposing the filling material 20021 in the holes of the support portion forms a dense structure of the support member, thereby improving the supporting performance of the support member.

[0138] In some embodiments, filler material 20021 includes at least one of a polymer material or an adhesive. For example, the polymer material includes at least one of polymethyl methacrylate (PMMA), polycarbonate (PC), polyetheretherketone (PEEK), or a composite material containing glass fiber, carbon fiber, or the like.

[0139] Therefore, filling the holes of the support member with polymer materials or adhesive materials can improve the cushioning performance of the support member.

[0140] In some embodiments, as shown in FIG. 11 , the support member further includes: a fourth support portion 2002 d , which is disposed around the second support layer 2002 , and is made of the first material.

[0141] Therefore, by providing the fourth supporting portion, the supporting portion of the second supporting layer 2002 can be prevented from contacting the outside, and air, moisture, and dust in the external environment can be prevented from invading the interior of the supporting member, thereby better protecting the supporting portion.

[0142] In some embodiments, the bent portion 2002c includes multiple through-holes. Thus, by providing through-holes extending through the bent portion 2002c, the bent portion 2002c forms a hollow area, which can increase the elastic deformation capacity of the bent portion 2002c, reduce the tensile force exerted on the first support portion 2002a and the second support portion 2002b, and partially share the tensile force exerted on the first support portion 2002a and the second support portion 2002b, thereby preventing the first support portion 2002a and the second support portion 2002b from breaking due to excessive tensile force. Furthermore, the hollow area can reduce the weight of the flexible display support, thereby reducing the weight of the electronic device.

[0143] The embodiment of the present application does not limit the forming process of the through hole of the bending portion 2002c. In some embodiments, a precise chemical etching method can be used to form regular through holes in the bending portion 2002c, so that the bending portion 2002c can be bent repeatedly and smoothly.

[0144] The present invention also provides a display screen assembly, comprising a flexible display screen 101 and the aforementioned support member 200. Flexible display screen 101 comprises a first non-bending region 101a, a second non-bending region 101b, and a bending region 101c, wherein bending region 101c is disposed between first non-bending region 101a and second non-bending region 101b.

[0145] The second supporting layer 2002 of the support member includes a first supporting portion 2002a, a second supporting portion 2002b, and a bending portion 2002c. The bending portion 2002c is located between the first supporting portion 2002a and the second supporting portion 2002b. The first supporting portion 2002a is disposed opposite the first non-bending region 101a of the flexible display 101, the second supporting portion 2002b is disposed opposite the second non-bending region 101b of the flexible display 101, and the bending portion 2002c is disposed opposite the bending region 101c of the flexible display 101. In this embodiment, the opposing arrangement can be such that the projections of the first supporting portion and the second supporting portion on the first supporting layer 2001 overlap.

[0146] The following takes a double-folding screen as an example and describes the structure of the display screen assembly provided in this application in combination with Example 1, Example 2, and Example 3.

[0147] Example 1

[0148] Figure 12 is a schematic structural diagram of a display screen assembly provided in Example 1. As shown in Figure 12 , the display screen assembly includes: a flexible display screen 101 and a support member 200 stacked along the z-direction.

[0149] The flexible display screen 101 includes a first non-bending area 101a, a second non-bending area 101b, and a bending area 101c. The bending area 101c is arranged between the first non-bending area 101a and the second non-bending area 101b.

[0150] The support member includes a first support layer 2001 and a second support layer 2002 stacked along the z direction.

[0151] The first supporting layer 2001 is connected to the flexible display screen 101 , and the second supporting layer 2002 is arranged on a side of the first supporting layer 2001 away from the flexible display screen 101 .

[0152] In some embodiments, the first supporting layer 2001 is made of a first material. The relative density of the first material may be greater than or equal to 97%, where the relative density refers to the percentage of the actual density to the theoretical density.

[0153] In this way, the first material has a high relative density, provides support for the display screen, and is beneficial to maintaining the flatness and rigidity of the screen.

[0154] The second supporting layer 2002 includes a first supporting portion 2002a, a bent portion 2002c, and a second supporting portion 2002b, arranged sequentially along the x-direction. The bent portion 2002c is located between the first supporting portion 2002a and the second supporting portion 2002b. The first supporting portion 2002a is positioned opposite the first non-bending region 101a of the flexible display 101, the second supporting portion 2002b is positioned opposite the second non-bending region 101b of the flexible display 101, and the bent portion 2002c is positioned opposite the bending region 101c of the flexible display 101. In this embodiment, the opposing arrangement means that the projections of the first supporting portion and the second supporting portion on the first supporting layer 2001 overlap.

[0155] In some embodiments, the bending portion 2002c is made of a first material, and the first support portion 2002a and the second support portion 2002b are made of a second material, wherein the relative density of the second material is less than that of the first material. For example, the relative density of the second material may be 10%-95%.

[0156] In this way, the supporting portion of the second supporting layer 2002 is made of the second material, which has a lower density. The average density of the supporting member with this structure is reduced, which can reduce the weight of the supporting member.

[0157] For example, taking 301 stainless steel profile as an example, the density is 8g / cm 3 In some embodiments, the thickness of the support member using the above structure is 0.08-0.2 mm, and the average density is about 4 g / cm 3 Its weight is lighter than that of titanium alloy materials, which reduces the weight of the supporting parts and is conducive to the lightweighting of electronic equipment.

[0158] This embodiment also provides a method for preparing a support member, as shown in FIG13 , the method comprising:

[0159] S101. As shown in FIG14 , a first support layer 2001 is printed using a 3D printing process.

[0160] The first supporting layer 2001 is made of a first material.

[0161] The first material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

[0162] In some embodiments, the thickness of the first supporting layer 2001 may be greater than or equal to 0.02 mm.

[0163] S102 . As shown in FIG. 15 , a second supporting layer 2002 is printed on the first supporting layer 2001 using a 3D printing process.

[0164] Among them, the second support layer 2002 includes: a first support part 2002a, a second support part 2002b and a bending part 2002c. The first support part 2002a, the bending part 2002c and the second support part 2002b are distributed along the thickness direction of the vertical support member. The bending part 2002c is located between the first support part 2002a and the second support part 2002b. The bending part 2002c is made of a first material, and the first support part 2002a and the second support part 2002b are made of a second material. The relative density of the first material is greater than the relative density of the second material.

[0165] The second material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

[0166] The present embodiment does not limit the materials used for the various parts of the second support layer 2002. In some embodiments, the first support layer 1001 and the bent portion 2002 can be made of the same material. It is only necessary to control the relative density of the materials during the 3D printing process so that the relative density of the bent portion 2002c is greater than the relative density of the first support portion 2002a and the second support portion 2002b.

[0167] In some embodiments, the thickness of the second supporting layer 2002 may be greater than or equal to 0.03 mm.

[0168] In some embodiments, the order of the above steps S101 and S102 can be swapped, which all fall within the scope of protection of this application.

[0169] In some embodiments, the first support portion 2002a and the second support portion 2002b each include a plurality of holes, as shown in FIG16 , and the method further includes:

[0170] S103. As shown in FIG. 17 , fill the plurality of holes of the first support portion 2002a and the second support portion 2002b with a filling material 20021 .

[0171] Among them, the provision of multiple holes in the support portion can make the relative density of the support portion smaller, which is beneficial to reducing the weight of the support member and achieving lightweight and thin electronic equipment.

[0172] In some embodiments, the support member further comprises: a filling material 20021, and the filling material 20021 is disposed in the plurality of holes. Thus, the filling material 20021 is disposed in the holes of the support portion, so that the support member forms a structure and improves the supporting performance of the support member.

[0173] In some embodiments, filler material 20021 includes at least one of a polymer material or an adhesive. For example, the polymer material includes at least one of polymethyl methacrylate (PMMA), polycarbonate (PC), polyetheretherketone (PEEK), or a composite material containing glass fiber, carbon fiber, or the like.

[0174] Therefore, filling the holes of the support member with polymer materials or adhesive materials can improve the cushioning performance of the support member.

[0175] Thus, the bent portion 2002c of the second support layer 2002 is made of the first material, which has a higher density and can retain the modulus and strength of steel, thereby increasing the screen lifting capacity, reducing the collision between the hinge mechanism and the flexible display 101, and better supporting the flexible display 101. When the foldable electronic device is closed, the flexible display 101 will sag, and the screen lifting capacity refers to the height to which the bent portion 2002c lifts the drooping flexible display 101.

[0176] In the second supporting layer 2002 provided in this embodiment, the first supporting portion 2002a and the second supporting portion 2002b are made of the second material, while the bent portion 2002c is made of the first material. The two are made of metal materials with different properties. The relative density of the first metal material making up the bent portion 2002c is greater than the relative density of the second metal material making up the supporting portion, resulting in a lighter weight of the supporting portion, which helps reduce the weight of the second supporting layer 2002. The elastic modulus of the first metal material making up the bent portion 2002c is greater than the elastic modulus of the second metal material making up the supporting portion, resulting in the bendable bent portion 2002c having higher strength and elastic deformation capacity. This allows the bent portion 2002c to withstand multiple bending cycles, improves the reliability of the bent portion 2002c, and extends the service life of the supporting member.

[0177] Furthermore, the aforementioned structure forms a high-relative-density-low-relative-density laminated structure in the non-bending region of the support member. The high-relative-density support layers and the low-relative-density support layers are alternately arranged along the z-direction. The high-relative-density support layers provide superior support performance, improving the flatness and rigidity of the flexible display 101. The low-relative-density support layers are lightweight, contributing to the slimming and lightness of the electronic device. Thus, by providing a laminated structure of high-relative-density and low-relative-density support members, the support performance of the support members is maintained while achieving a slimmer product and improving the user experience.

[0178] Furthermore, the entire bending region of the support is made of a high-relative-density material. This high density preserves the modulus and strength of steel, giving the bending region high strength and elastic deformation capacity. This allows the bending region to withstand multiple bending cycles, improving its reliability and extending the lifespan of the support. Furthermore, the use of this first material increases the screen lift capacity, reduces collisions between the hinge mechanism and the flexible display 101, and provides better support for the flexible display 101.

[0179] Example 2

[0180] FIG18 is a schematic structural diagram of a display screen assembly provided in Example 2. The display screen assembly shown in FIG18 differs from the display screen assembly shown in FIG12 in that the support member further includes a third support layer 2003 , which is disposed on a side of the second support layer 2002 away from the first support layer 2001 .

[0181] In some embodiments, as shown in FIG19 , after step S102 , the method further includes:

[0182] S104 . As shown in FIG. 20 , a third supporting layer 2003 is printed on the second supporting layer 2002 using a 3D printing process.

[0183] The third supporting layer 2003 is made of the first material.

[0184] In some embodiments, the thickness of the third supporting layer 2003 may be greater than or equal to 0.02 mm.

[0185] Therefore, the display screen assembly provided in the embodiment of the present application, by setting the third supporting layer 2003 on the second supporting layer 2002, so that the third supporting layer 2003 is set close to one side of the shell, and the supporting layer uses a material with a relatively high density, which can further improve the supporting performance of the supporting member.

[0186] Furthermore, the non-bending regions of the support members form a high relative density-low relative density-high relative density laminated structure, with high and low relative density support layers alternating along the z-direction. The high relative density support layers offer superior support performance, improving the flatness and rigidity of the flexible display 101 and the housing, while the low relative density support layers are lighter, contributing to the slimmer and lighter electronic devices. Thus, by providing a laminated structure of high and low relative density support members, the support performance of the support members is maintained while achieving a slimmer and lighter product, improving the user experience.

[0187] Furthermore, the entire bending region of the support is made of a high-relative-density material. This high density preserves the modulus and strength of steel, giving the bending region high strength and elastic deformation capacity. This allows the bending region to withstand multiple bending cycles, improving its reliability and extending the lifespan of the support. Furthermore, the use of this first material increases the screen lift capacity, reduces collisions between the hinge mechanism and the flexible display 101, and provides better support for the flexible display 101.

[0188] Example 3

[0189] FIG21 is a schematic structural diagram of a display screen assembly provided in Example 2. The display screen assembly shown in FIG21 differs from the display screen assembly shown in FIG18 in that the support member further includes a fourth support portion 2002d, which is disposed around the second support layer 2002 and is made of the first material.

[0190] As shown in FIG. 22 , in step S102 , when forming the second supporting layer 2002 on the first supporting layer 2001 , the process includes forming a fourth supporting portion 2002 d on the first supporting layer 2001 .

[0191] Therefore, by setting the fourth support part 2002d, the first support part 2002a and the second support part 2002b with relatively low density in the second support layer 2002 can be prevented from contacting the outside, and the air, moisture and dust in the external environment can be prevented from invading the interior of the support part, which can better protect the support part.

[0192] An electronic device is also provided in an embodiment of the present application. In the embodiment of the present application, the electronic device may include the above-mentioned display screen assembly.

[0193] The electronic device in the embodiment of the present application includes a display screen assembly, which, on the one hand, ensures the flatness and rigidity of the flexible display screen, and on the other hand, facilitates the formation of a bending zone in the bending portion 2002c of the support member, which is made of a material with a high relative density, thereby facilitating bending, and forms a non-bending zone in the non-bending portion 2002c of the support member, and adopts a structure in which high relative density and low relative density are alternately arranged, which can take into account both support performance and lightness.

[0194] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions 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 support member, the support member being arranged on the backlight side of a display screen, characterized in that: The support member includes: a first support layer and a second support layer which are stacked, the first support layer is arranged close to the display screen, the first support layer is made of a first material, the second support layer includes: a first support portion, a second support portion and a bending portion, the first support portion, the bending portion and the second support portion are distributed along a direction perpendicular to the thickness direction of the support member, the bending portion is located between the first support portion and the second support portion, the bending portion is made of the first material, the first support portion and the second support portion are made of a second material, and the relative density of the first material is greater than the relative density of the second material.

2. The support member according to claim 1, characterized in that The relative density of the first material is greater than or equal to 97%, and the relative density of the second material is 10%-95%.

3. The support member according to claim 1 or 2, characterized in that: The support member is formed by 3D printing or powder metallurgy.

4. The support member according to any one of claims 1 to 3, characterized in that: The material of the first material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

5. The support member according to any one of claims 1 to 4, characterized in that: The material of the second material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

6. The support member according to any one of claims 1 to 5, characterized in that: The thickness of the first supporting layer is greater than or equal to 0.02 mm; the thickness of the second supporting layer is greater than or equal to 0.03 mm.

7. The support member according to any one of claims 1 to 6, characterized in that: The support member further includes a filling material, the first support portion and the second support portion each include a plurality of holes, and the filling material is disposed in the plurality of holes.

8. The support member according to claim 7, characterized in that The filling material includes: polymer material or glue material.

9. The support member according to any one of claims 1 to 8, characterized in that: The support member further includes: a third supporting layer, which is disposed on a side of the second supporting layer away from the first supporting layer, and is made of the first material.

10. The support member according to claim 9, characterized in that The thickness of the third supporting layer is greater than or equal to 0.02 mm.

11. The support member according to any one of claims 1 to 10, characterized in that: The thickness of the support member is 0.08-0.2 mm.

12. The support member according to any one of claims 1 to 11, characterized in that: The support member further includes: a third support portion, which is disposed around the second support layer and is made of the first material.

13. The support member according to any one of claims 1 to 12, characterized in that: The bending portion includes a plurality of through holes.

14. The support member according to any one of claims 1 to 13, characterized in that: The bending portion includes: a first bending portion and a second bending portion, and the second supporting layer also includes: a third supporting portion, the first supporting portion, the first bending portion, the second supporting portion, the second bending portion and the third supporting portion are distributed along a direction perpendicular to the thickness direction of the supporting member, the first bending portion is located between the first supporting portion and the second supporting portion, and the second bending portion is located between the second supporting portion and the third supporting portion.

15. A display screen assembly, characterized in that: include: A flexible display screen, and a support member as described in any one of claims 1 to 14, wherein the support member is arranged on the backlight side of the flexible display screen, and the flexible display screen is connected to the first support layer.

16. The display screen assembly according to claim 15, characterized in that: The first non-bending area of ​​the display screen is opposite to the first supporting portion; The second non-bending area of ​​the display screen is opposite to the second supporting portion; The bending area of ​​the display screen is opposite to the bending portion; Wherein, the bending zone is arranged between the first non-bending zone and the second non-bending zone.

17. An electronic device, characterized in that: It comprises: a shell and a display screen assembly as claimed in claim 15 or 16, wherein the display screen assembly is connected to the shell.

18. A method for preparing a support member, characterized in that: include: Printing a first support layer using a 3D printing process, wherein the first support layer is made of a first material; Printing a second supporting layer on the first supporting layer using a 3D printing process; The second supporting layer includes: a first supporting portion, a second supporting portion and a bending portion, wherein the first supporting portion, the bending portion and the second supporting portion are distributed in a direction perpendicular to the thickness direction of the supporting member, the bending portion is located between the first supporting portion and the second supporting portion, the bending portion is made of the first material, the first supporting portion and the second supporting portion are made of the second material, and the relative density of the first material is greater than the relative density of the second material.

19. The preparation method according to claim 18, characterized in that: The method further comprises: A third supporting layer is printed on the second supporting layer by using a 3D printing process, wherein the third supporting layer is made of the first material.

20. The preparation method according to claim 18 or 19, characterized in that: The first support portion and the second support portion each include a plurality of holes, and the method further includes: A filling material is filled in the plurality of holes.

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