Supporting piece, display screen assembly and electronic equipment

Abstract

The invention provides a supporting piece, a display screen assembly and electronic equipment, the supporting piece is arranged on the backlight side of a display screen, the supporting piece comprises a first supporting layer and a second supporting layer which are arranged in a stacked mode, the first supporting layer is arranged close to the display screen and is made of a first metal material, and the second supporting layer is made of a second metal material; the second supporting layer comprises a first supporting part, a second supporting part and a bending part which are distributed in the direction perpendicular to the thickness direction of the supporting piece, the bending part is located between the first supporting part and the second supporting part, the bending part is made of the first material, the first supporting part and the second supporting part are made of a second metal material, and the bending part is made of the second metal material. The density of the first metal material is larger than that of the second metal material, and the supporting piece is integrally formed in a rolling mode. Therefore, the supporting performance and the lightness and thinness of the supporting piece can be considered, a rolling forming mode is adopted, the connection strength and stability between all the components can be improved, and the flatness of the display screen is improved.

Description

Technical Field

[0001] 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

[0002] With the continuous development of display technology, foldable display terminals are gradually becoming a development trend of future mobile electronic products. Foldable display terminals include at least a flexible display screen. The performance of each component will directly affect the performance of the display screen. In order to maintain the flatness and rigidity of the flexible display screen, there is usually one or more layers of metal under the screen as a support.

[0003] The existing support parts are mainly made of metal materials: stainless steel, copper alloy, titanium alloy, aluminum alloy, which have high density and heavy weight. As consumers' requirements for the portability of electronic devices increase, they also require the weight of support parts to be reduced. For this reason, support parts can also be made of fiber composite materials, such as carbon fiber, glass fiber, aramid fiber, ceramic fiber and other composite materials, which have low density and have very obvious weight reduction benefits. However, the stiffness of fiber materials after being compounded with resin is poor, and the thickness needs to be increased to compensate, which is not conducive to the thinness of the product.

[0004] However, the existing support members cannot meet the requirement of light and reliable support. Summary of the invention

[0005] 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 take into account both lightness and supporting performance.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In the first aspect of the present application, a support member is provided, which is arranged on the backlight side of a display screen, and the support member includes: a first support layer and a second support layer arranged in a stacked manner, the first support layer is arranged close to the display screen, the first support layer is made of a first metal material, and 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 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 metal material, the first support portion and the second support portion are made of a second metal material, the density of the first metal material is greater than the density of the second metal material, and the support member is integrally formed by rolling. Thus, the first support layer adopts an integral structure and is connected to the flexible display screen, which is conducive to improving the flatness of the flexible display screen. The first metal material has a high density, provides support for the display screen, and is conducive to maintaining the rigidity of the screen. The first support part and the second support part in the second support layer are made of the second metal material, which has a relatively low density, so that the weight of the first support part and the second support part is relatively light, which is conducive to reducing the weight of the second support layer. The bending part is made of the first metal material, which has a relatively high density and can be bent multiple times, and has better bending performance. In addition, the rolling forming method is adopted to strengthen the bonding force between the first support layer, the second support layer, and the support part and the bending part in the second support layer, which is conducive to improving the connection strength and stability between the first support layer and the second support layer, and between the support part and the bending part, and improves the flatness of the display screen.

[0008] In addition, from the overall point of view, the non-bending area of ​​the support member forms a laminated structure of a high-density first metal material-a low-density second metal material. The high-density support layer and the low-density support layer are alternately arranged along the z direction. The high-density support layer has good support performance, which can improve the flatness and rigidity of the flexible display screen and the shell, while the low-density support layer is light in weight, which is conducive to the thinness of the electronic device. In this way, by setting a laminated structure of high-density support members and low-density support members, the product is thinned while ensuring the support performance of the support member, and the user experience is improved. In addition, the bending area of ​​the support member is all made of a high-density first metal material with a large density, which can retain the modulus and strength of the steel, so that the bending area has a high strength and elastic deformation capacity, so that the bending area can withstand multiple bendings, improve the reliability of the bending area, and extend the service life of the support member. And the use of the first metal material is conducive to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display screen, and can better support the flexible display screen.

[0009] In an optional implementation, the flatness of the surface of the first support layer close to the display screen is less than 0.1 mm. Thus, the first support layer adopts an integrated structure with a small flatness, which can improve the flatness of the flexible display screen when connected to the display screen.

[0010] In an optional implementation, the density of the first metal material is greater than or equal to 97%, and the density of the second metal material is 10%-95%, thereby making the density of the first metal material greater than the density of the second metal material.

[0011] In an optional implementation, the material of the first metal material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material. Therefore, there are many types of first metal materials that can be selected. By adjusting the density of the first metal material, the density of the first metal material is high, which provides support for the display screen and is conducive to maintaining the flatness and rigidity of the screen.

[0012] In an optional implementation, the material of the second metal material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material. Therefore, there are many types of second metal materials that can be selected. By adjusting the density of the second metal material to make the density of the second metal material low, the average density of the support member using the second metal material is reduced, and the weight of the support member can be reduced.

[0013] In an optional implementation, the thickness of the first support layer is greater than or equal to 0.02 mm; the thickness of the second support layer is greater than or equal to 0.03 mm. Thus, the average density of the support member using this structure is relatively small, which reduces the weight of the support member and is conducive to the thinness of the electronic device.

[0014] In an optional implementation, the support member further includes: a third support layer, the third support layer is arranged on a side of the second support layer away from the first support layer, and the third support layer is made of the first metal material. Thus, the third support layer is arranged on the side close to the shell, and a material with a higher density is used, which can further improve the support performance 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, thereby improving the support performance of the support layer.

[0016] In an optional implementation, the thickness of the support member is 0.08-0.2 mm. Therefore, the support member adopting this structure has a smaller thickness and better supporting performance, achieving both portability and supporting performance.

[0017] 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 metal material. Thus, by providing the third support portion, the support portion of the second support layer can be prevented from contacting the outside, and the air, moisture, and dust in the external environment can be prevented from intruding into the support member, so that the support portion can be better protected.

[0018] In an optional implementation, the bending portion includes a plurality of through holes. Thus, by providing through holes penetrating the bending portion, the bending portion is made into a hollow area, which can increase the elastic deformation capacity of the bending portion, and can reduce the tensile force on the first support portion and the second support portion, thereby avoiding the problem of the first support portion and the second support portion being broken due to excessive tensile force. In addition, the hollow area can reduce the weight of the flexible display support, thereby reducing the weight of the electronic device.

[0019] In an optional implementation, the bending portion includes: a first bending portion and a second bending portion, the second support layer also includes: a third support portion, the first support portion, the first bending portion, the second support portion, the second bending portion and the third support portion are distributed in a direction perpendicular to the thickness direction of the support member, 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. Therefore, 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, achieving lightweight products and improving user experience.

[0020] In a second aspect of the present application, a display screen assembly is provided, comprising: a flexible display screen, and the support member as described above, the support member being arranged on the backlight side of the flexible display screen, and the flexible display screen being connected to the first support layer. Thus, the flexible display screen assembly adopts the support member, thereby improving the flatness and rigidity of the flexible display screen, and achieving a thin and light product while ensuring the supporting performance, thereby improving the user experience.

[0021] In an optional implementation, the first non-bending area of ​​the flexible display screen is opposite to the first supporting portion; the second non-bending area of ​​the flexible display screen is opposite to the second supporting portion; 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-density support members and low-density support members are alternately arranged, which achieves a lightweight product while ensuring the supporting performance of the support member, thereby improving the user experience. The position where the support member is connected to the bending area of ​​the flexible display screen is all made of high-density materials with a large density, which improves the modulus and strength of the position, so that the part connected to the bending area of ​​the flexible display screen has a high strength and elastic deformation capacity, so that the bending area can withstand multiple bendings, improve the reliability of the bending area, extend the service life of the support member, and is conducive to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display screen, and can better support the flexible display screen.

[0022] The third aspect of the present application provides an electronic device, comprising: a housing and the display screen assembly as described above, wherein the display screen assembly is connected to the housing. Thus, the electronic device adopts the display screen assembly as described above, achieves a lightweight product while ensuring support performance, and improves user experience.

[0023] In a fourth aspect of the present application, a method for preparing a support member is provided, comprising: providing a first plate made of a first metal material and a second plate made of a second metal material, wherein the density of the first metal material is greater than the density of the second metal material;

[0024] The first plate material and the second plate material are composite-processed to form a support member; the support member comprises: a first support layer and a second support layer which are stacked, the first support layer is made of the first plate material, the second support layer comprises: 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 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 plate material, and the first support portion and the second support portion are made of the second plate material.

[0025] In an optional implementation, processing the first plate and the second plate into the support member includes: cold rolling the first plate and the second plate to form the support member.

[0026] In an optional implementation, before cold rolling the first plate and the second plate, the method further includes: extruding the first plate and the second plate in an extruder.

[0027] 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 metal material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the disassembled structure of an electronic device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of another electronic device provided in an embodiment of the present application;

[0031] Figure 4 A cross-sectional view of an electronic device provided in an embodiment of the present application;

[0032] Figure 5 is a structural schematic diagram of a support member;

[0033] Figure 6 is a schematic diagram of the structure of another support member;

[0034] Figure 7 A schematic diagram of a connection method of a support member;

[0035] Figure 8 is a schematic diagram of another connection method of the supporting members;

[0036] Fig. 9 A schematic diagram of the structure of a support member provided in an embodiment of the present application;

[0037] Fig.10 A schematic diagram of the structure of a first supporting member provided in an embodiment of the present application;

[0038] Fig.11 A schematic diagram of the structure of a second support member provided in an embodiment of the present application;

[0039] Fig.12 A schematic structural diagram of a third supporting member provided in an embodiment of the present application;

[0040] Fig.13 A schematic structural diagram of a fourth supporting member provided in an embodiment of the present application;

[0041] Fig.14 A schematic structural diagram of a fifth supporting member provided in an embodiment of the present application;

[0042] Fig.15 A flow chart of a method for preparing a support member provided in Example 1;

[0043] Fig.16 , Fig.17 Execute Fig.15 Schematic diagram of the product structure after each step is shown. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0045] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "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.

[0046] In addition, in the present 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 the changes in the orientation of the components in the drawings.

[0047] The embodiment of the present application provides an electronic device. The electronic device may be a tablet computer, a mobile phone, an e-reader, a remote controller, a personal computer (PC), a laptop computer, a personal digital assistant (PDA), a vehicle-mounted device, an Internet TV, a wearable device, a TV, and other products with a display interface, as well as smart display wearable products such as smart watches and smart bracelets. The embodiment of the present application does not impose any special restrictions on the form of the above electronic devices.

[0048] 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.

[0049] For the convenience of description, the following embodiments are all described by taking a mobile phone as an example of the electronic device.

[0050] Figure 1 A schematic diagram of the disassembled structure of an electronic device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the electronic device 1 includes a display module 10 and a housing (or battery cover) 12. The middle frame 11 is located between the display module 10 and the housing 12.

[0051] The display module 10 is used to display images.

[0052] 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, and these layers can be parallel to each other. The plane where 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 distributed in layers in the Z direction.

[0053] The display module 10 can be Figure 1 The flexible printed circuit (FPC) shown passes through the middle frame 11 and is electrically connected to the PCB disposed on the middle frame 11. Thus, the PCB can transmit display data to the display module 10 to control the display module 10 to display images.

[0054] The middle frame 11 is located between the display module 10 and the housing 12. The surface of the middle frame 11 away from the display module 10 is used to install internal components such as a battery, a printed circuit board (PCB), a camera, and an antenna. After the housing 12 and the middle frame 11 are covered, the above internal components are located between the housing 12 and the middle frame 11.

[0055] The housing 12 is connected to the middle frame 11 to form a receiving cavity for receiving the above-mentioned PCB, camera, battery and other electronic components, thereby preventing external moisture and dust from invading the receiving cavity and affecting the performance of the above-mentioned electronic components.

[0056] The embodiments of the present application do not limit the structure of the mobile phone. In some embodiments of the present application, such as Figure 2 , Figure 3 As shown, the mobile phone may be a foldable screen mobile phone, and the display module 10 includes a flexible display screen 101 .

[0057] The flexible display screen 101 may be an active matrix organic light emitting diode (AMOLED) display screen.

[0058] As a self-luminous display, the AMOLED display screen does not need a backlight module (BLM). Therefore, when the base substrate in the AMOLED display screen is made of a flexible resin material, such as polyimide (PI) or polyethylene terephthalate (PET), the AMOLED display screen can have a bendable property.

[0059] Figure 2 The structure diagram of a dual-screen folding mobile phone is shown, and the folding mobile phone includes a first shell 12a, a second shell 12b, a flexible display screen 101 and a hinge mechanism. The flexible display screen 101 can be continuously covered on the first shell 12a and the second shell 12b, and the first shell 12a and the second shell 12b are arranged on both sides of the hinge mechanism and are respectively connected to the hinge mechanism. The flexible display screen 101 can also be flattened and closed under the action of the hinge mechanism.

[0060] Figure 3A structural diagram of a three-screen folding mobile phone is shown, and the folding screen mobile phone of the example is a three-screen folding mobile phone. The three-folding screen mobile phone may include a first housing 12a, a second housing 12b and a third housing 12c, and a flexible display screen 101. The flexible display screen 101 may be continuously covered on the first housing 12a, the second housing 12b and the third housing 12c. The folding screen mobile phone may also include a first rotating shaft mechanism and a second rotating shaft mechanism.

[0061] The first shell 12a and the second shell 12b are arranged on both sides of the first hinge mechanism and are respectively connected to the first hinge mechanism. The first hinge mechanism can move so that the first shell 12a and the second shell 12b are relatively folded or relatively unfolded, thereby realizing the flattening and closing of the flexible display screen 101 arranged on the first shell 12a and the second shell 12b.

[0062] The second shell 12b and the third shell 12c 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 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.

[0063] A foldable electronic device can be unfolded to a flat state, or folded to a closed state, or in an intermediate state between the flat state and the closed state. A foldable electronic device has at least two states, namely, a flat state and a closed state. In some cases, a third state may be further included, which is an intermediate state between the flat state and the closed state. The intermediate state does not have only one state, and may be any one or more states between the flat state and the closed state of the electronic device.

[0064] Above Figure 2 and Figure 3 The examples are dual-screen and triple-screen folding electronic devices. The folding electronic device involved in the embodiments of the present application may also be a device with more screens, such as a four-screen folding electronic device, a five-screen folding electronic device, etc.

[0065] The following explanation is given using a dual-screen folding electronic device as an example. Figure 4 Schematic diagrams of the structures of some exemplary electronic devices. Figure 4 As shown, in order to protect the flexible display screen 101 , the electronic device further includes: a support member 200 , which is disposed on the backlight side of the flexible display screen 101 , and is used to provide reliable support for the flexible display screen 101 .

[0066] 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.

[0067] like Figure 4 As shown, the housing 12 includes: a first housing 12a, a second housing 12b, and a hinge mechanism 13 located between the first housing 12a and the second housing 12b. The first housing 12a and the second housing 12b can rotate along the axis OO of the hinge mechanism 13 respectively, thereby driving the display screen 102 to fold or unfold.

[0068] For example, when the angle α between the first shell 12a and the second shell 12b is 0°, the flexible display screen 101 is in a folded state.

[0069] Alternatively, when the angle α between the first shell 12a and the second shell 12b increases to 180°, the flexible display screen 101 is in an unfolded state.

[0070] 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 .

[0071] The support member 200 is disposed on the backlight side of the flexible display screen 101, that is, between the flexible display screen 101 and the housing 12. In some embodiments, the support member 200 includes: a first support portion 201 connected to the first non-bending area, a second support portion 202 connected to the second non-bending area, and a bending portion 203 connected to the bending area.

[0072] 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.

[0073] Figure 5 Schematic diagram of the structure of a support member. Figure 5 ,exist Figure 5 In the example shown, the support member 200 includes a metal layer. The first support portion 201, the second support portion 202 and the bending portion 203 are all made of metal material.

[0074] 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.

[0075] In some examples, the metal material may be stainless steel, copper alloy, titanium alloy, or aluminum alloy.

[0076] For example, the size of the support member 200 is 140*155 mm and the thickness is 0.15 mm.

[0077] 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.

[0078] 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 it still achieves lightweight, and the cost is increased compared with stainless steel.

[0079] Figure 6 is a schematic diagram of the structure of another support member. Figure 6 , the support member 200 includes a fiber layer.

[0080] In some examples, the material of the fiber layer may 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.

[0081] Compared with the metal layer, the fiber layer is lighter, but the fiber layer has poor rigidity. When the flexible display is repeatedly bent or unfolded, the opposite sides of the flexible display will be continuously subjected to inward compression force and outward tension force. This may easily lead to insufficient flatness and rigidity of the flexible display after long-term use. Among them, rigidity 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 rigidity, the smaller the elastic deformation, and the smaller the elastic modulus or rigidity, the greater the elastic deformation.

[0082] In some embodiments, the stiffness can be compensated by increasing the thickness of the support member, which is not conducive to the thinness of the product.

[0083] 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.

[0084] 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.

[0085] 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 .

[0086] The embodiment of the present application does not limit the connection method between the first supporting portion 201, the second supporting portion 202 and the bending portion 203. In some embodiments, Figure 7 As shown, the first supporting portion 201, the second supporting portion 202 and the bending portion 203 are connected by splicing.

[0087] In other embodiments, Figure 8 As shown, the first supporting portion 201, the second supporting portion 202 and the bending portion 203 are connected by overlapping.

[0088] However, both the splicing and overlapping connection methods will produce seams, which are prone to unevenness and can easily cause light and shadows when attached to the flexible display, affecting usage.

[0089] To this end, the present application provides an improved support member. The support member provided in the embodiment of the present application is introduced below.

[0090] Fig. 9 This is a schematic diagram of the structure of a support member provided in an embodiment of the present application. Fig. 9 As shown, the support member includes: a first support layer 2001 and a second support layer 2002 stacked along the z direction.

[0091] 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.

[0092] In some embodiments, the first support layer 2001 is made of a first metal material. The density of the first metal material may be greater than or equal to 97%. Wherein, density refers to the percentage of actual density to theoretical density. In this embodiment, the actual density is the density obtained by detection. Theoretical density refers to the density of the solid phase in the first metal material, that is, the density of the first metal material in a non-porous state.

[0093] The first metal material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

[0094] In some embodiments, the thickness of the first supporting layer 2001 may be greater than or equal to 0.02 mm.

[0095] In this way, the first metal material has a high density and a certain thickness, which provides support for the display screen and is beneficial to maintaining the flatness and rigidity of the screen.

[0096] 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.

[0097] In some embodiments, the bending portion is made of a first metal material, and the supporting portion is made of a second metal material, and the density of the second metal material is less than that of the first metal material. For example, the density of the second metal material may be 10%-95%.

[0098] The second metal material includes: one or more of steel, titanium, aluminum, amorphous alloy, metal-based composite material, and plastic-based composite material.

[0099] In some embodiments, the thickness of the second supporting layer 2002 may be greater than or equal to 0.03 mm.

[0100] In this way, the supporting part of the second supporting layer 2002 is made of the second metal material, and the density of the second metal material is relatively small. The average density of the supporting member using this structure is reduced, and the weight of the supporting member can be reduced.

[0101] 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 About, its weight ratio Figure 5 The structure is made of titanium alloy material, which is light and reduces the weight of the supporting parts, which is conducive to the lightweighting of electronic equipment.

[0102] The bending portion of the second support layer 2002 is made of the first metal material, which has a high density and can retain the modulus and strength of the steel, which is conducive to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display screen, and can better support the flexible display screen. After the foldable electronic device is closed, the flexible display screen will sag, and the screen lifting amount refers to the height of the sag flexible display screen lifted by the bending portion.

[0103] The supporting part and the bending part in the second supporting layer 2002 provided in this embodiment are made of metal materials with different characteristics, wherein since the density of the first metal material making the bending part is greater than the density of the second metal material making the supporting part, the weight of the supporting part is lighter, which is beneficial to reducing the weight of the second supporting layer 2002, and the elastic modulus of the first metal material making the bending part is greater than the elastic modulus of the second metal material making the supporting part, so that the bending part that can be bent has higher strength and elastic deformation ability, so that the bending part can withstand multiple bending, thereby improving the reliability of the bending part and extending the service life of the support.

[0104] The embodiment of the present application does not limit the number and position of the supporting parts and the bending parts in the second supporting layer 2002.

[0105] In some embodiments, Fig. 9 As shown, the support member is used for a dual-screen folding electronic device. In this case, the support portion includes: a first support portion 2002a and a second support portion 2002b, and the bending portion 2002c is located between the first support portion 2002a and the second support portion 2002b. Fig.12As shown, the first supporting portion 2002a is arranged opposite to the first non-bending area 101a of the flexible display screen (or opposite to the first shell), the second supporting portion 2002b is arranged opposite to the second non-bending area 101b of the flexible display screen (or opposite to the second shell), and the bending portion 2002c is arranged opposite to the bending area 101c of the flexible display screen (or opposite to the hinge mechanism).

[0106] In this embodiment, the first supporting portion 2002a and the second supporting portion 2002b are made of the second metal material, and the bending portion 2002c is made of the first metal material.

[0107] In some embodiments, the support member is used for a three-screen folding 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. Figure 3 The first housing 12a is arranged opposite to the second supporting portion. Figure 3 The second housing 12b is arranged opposite to the third support portion. Figure 3 The third shell 12c shown is arranged opposite to each other, 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.

[0108] In this embodiment, the first supporting portion, the second supporting portion and the third supporting portion are made of the second metal material, and the first bending portion and the second bending portion are both made of the first metal material.

[0109] 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 the supporting parts can refer to the above embodiments and will not be repeated here.

[0110] The support member adopts a structure in which the second support layer 2002 and the first support layer 2001 are stacked. The first support layer 2001 is arranged close to the display screen and adopts a high-density material to provide support for the display screen, which is conducive to maintaining the flatness and rigidity of the screen. The support portion and the bending portion 2002c in the second support layer 2002 are made of metal materials with different characteristics. Among them, since the density of the first metal material used to make the bending portion 2002c is greater than the density of the second metal material used to make the support portion, the weight of the support portion is lighter, which is conducive to reducing the weight of the second support layer 2002. The elastic modulus of the first metal material used to make the bending portion 2002c is greater than the elastic modulus of the second metal material used to make the support portion, so that the bending portion 2002c that can be bent has higher strength and elastic deformation capacity, so that the bending portion 2002c can withstand multiple bending, improve the reliability of the bending portion 2002c, and extend the service life of the support member.

[0111] 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, and a support portion with a lower 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.

[0112] In some embodiments, the first supporting layer 2001 and the second supporting layer 2002 are prepared by a rolling process.

[0113] See also Figure 9-12 The first supporting layer 2001 includes a first surface and a second surface opposite to each other. The first surface of the first supporting layer 2001 is connected to the flexible display screen 101 , and the second surface of the first supporting layer 2001 is connected to the second supporting layer 2002 .

[0114] In some embodiments, the first surface of the first supporting layer 2001 is a plane, and the second surface of the first supporting layer 2001 may adopt a shape that matches the second supporting layer 2002. For example, the flatness of the first surface of the first supporting layer 2001 is less than 0.1 mm. The flatness of the first surface of the first supporting layer 2001 refers to the deviation of the macroscopic convex height of the first surface of the first supporting layer 2001 from the ideal plane. The smaller the flatness, the flatter the surface.

[0115] Therefore, the first supporting layer 2001 adopts an integrated structure with a flatness of less than 0.1 mm, and is connected to the flexible display screen 101 , which is beneficial to improving the flatness of the flexible display screen 101 .

[0116] In some embodiments, see Fig. 9, the second support layer 2002 is formed by rolling of the bending portion 2002c, the first support portion 2002a, and the second support portion 2002b. The bending portion 2002c includes a first surface connected to the first support layer, a second surface opposite to the first surface, and a rolling surface connected to the support portion. The first support portion 2002a and the second support portion 2002b include a rolling connection surface that matches and is fixedly connected to the rolling surface. That is, the rolling surface matches the rolling connection surface. Since the rolling surface matches the rolling connection surface, the following is a brief description using the rolling surface as an example.

[0117] The rolled surface includes a first rolled surface and a second rolled surface. The first surface and the second surface are arranged opposite to each other along the z direction. The first rolled surface is connected between the first surface and the second surface. The second rolled surface is connected between the first surface and the second surface. The rolled connection surfaces of the bending portion 2002c and the first supporting portion 2002a are inlaid and combined with each other through the first rolled surface. The rolled connection surfaces of the bending portion 2002c and the second supporting portion 2002b are inlaid and combined with each other through the second rolled surface.

[0118] The bending portion 2002c is fixed together with the rolling connection surfaces of the first support portion 2002a and the second support portion 2002b through the rolling surface. Since the first metal material and the second metal material undergo plastic deformation during the rolling process, the rolling surface of the bending portion 2002c is embedded and combined with the rolling connection surfaces of the first support portion 2002a and the second support portion 2002b, so that the bonding force between the first support portion 2002a, the second support portion 2002b and the bending portion 2002c is stronger, which is beneficial to improving the connection strength and stability between the first support portion 2002a, the second support portion 2002b and the bending portion 2002c. Among them, rolling refers to a pressure processing method in which a metal blank passes through the gap (various shapes) of a pair of rotating rollers, and the material cross-section is reduced and the length is increased due to the compression of the rollers.

[0119] In this embodiment, the first rolling surface and the second rolling surface may be vertical surfaces perpendicular to the first surface, that is, the cross section of the bending portion 2002 c is substantially rectangular, which facilitates the preparation of the second supporting layer 2002 .

[0120] The present application does not limit the shape and structure of the first supporting portion 2002a, the second supporting portion 2002b and the bending portion 2002c. Fig.10 The cross-section of the bending portion 2002c is roughly trapezoidal, the first rolling surface and the second rolling surface can be inclined surfaces inclined relative to the first surface, the angle between the first rolling surface and the first surface is an obtuse angle, and the angle between the second rolling surface and the first surface is an obtuse angle.

[0121] In other embodiments, see Fig.11The cross-section of the bending portion 2002c is roughly a parallelogram, the first rolling surface and the second rolling surface can be inclined surfaces inclined relative to the first surface, the angle between the first rolling surface and the first surface is an obtuse angle, and the angle between the first rolling surface and the first surface is an acute angle.

[0122] In other embodiments, see Fig.12 , the first rolling surface and the second rolling surface both include step surfaces.

[0123] because Figure 9-12 The first rolled surface shown in the figure is a plane that is not perpendicular to the first surface, which increases the contact area between the bending portion 2002c and the first support portion 2002a and the second support portion 2002b, and is beneficial to improving the bonding strength between the bending portion 2002c and the first support portion 2002a and the second support portion 2002b.

[0124] It can be understood that the cross-sectional shapes of the first rolling surface and the second rolling surface can be the same or different; the shape of the first rolling surface is not limited, for example, the first rolling surface can also be serrated, curved, etc.; the structural shape of the second rolling surface is not limited, for example, the first rolling surface can also be serrated, curved, etc. The rolling surface can be a plane perpendicular to the first surface, the rolling surface of the rolling surface can be an inclined surface inclined relative to the first surface, the rolling surface can also be a curved surface, a special-shaped surface, a step surface, etc. The rolling surface includes at least one of a plane and a curved surface, and the rolling connection surface matches the rolling surface.

[0125] When preparing the support member 200, a first plate made of a first metal material and a second plate made of a second metal material are selected, the first plate and the second plate are arranged, and the first plate and the second plate are rolled and compounded together. The rolled plates are sequentially subjected to slicing, rough leveling, fine leveling, lamination / mimeographing, exposure, development, etching, and then stripping and cleaning to obtain the support member 200.

[0126] It can be understood that the support member 200 is not limited to be prepared by a rolling process, and the first support layer 2001, the bending portion 2002c, the first support portion 2002a, and the second support portion 2002b can be fixedly connected by other means, for example, gluing, welding, etc.

[0127] The embodiment of the present application also provides a method for preparing a support member 200, comprising the following steps:

[0128] S101. Provide a first plate made of a first metal material and a second plate made of a second metal material.

[0129] The first plate is used to form the first support layer 2001 and the bending portion 2002c, and the second plate is used to form the first support portion 2002a and the second support portion 2002b. The first metal material is different from the second metal material, and the density of the first metal material is greater than that of the second metal material. The thickness direction of the first plate is the z direction.

[0130] For example, the first metal material includes: one or more of alloy steel, pure titanium, titanium alloy, pure aluminum, aluminum alloy, and metal-based composite materials; the second metal material includes: one or more of pure aluminum, aluminum alloy, pure magnesium, magnesium alloy, and metal-based composite materials.

[0131] S102 . Composite-processing the first plate and the second plate to form a support member 200 .

[0132] The support member 200 includes a first support layer 2001 and a bending portion 2002c formed by a first plate material, and a first support portion 2002a and a second support portion 2002b formed by a second plate material. The first support layer 2001 and the second support layer 2002 are arranged along the z direction, the first support portion 2002a and the second support portion 2002b and the bending portion 2002c are arranged along the x direction, and the bending portion 2002c can be bent.

[0133] In this embodiment, the first plate and the second plate are rolled to form the support member 200. The rolling can be performed in two ways, the first rolling way is different temperature rolling and cold rolling, and the second rolling way is multi-pass cold rolling. Different temperature rolling means that the heating temperature of rolling is different according to different metal materials, for example, stainless steel is heated to 300-500°C, while aluminum alloy is not heated, and the two are rolled together for compounding.

[0134] When the first rolling method (different temperature rolling and cold rolling) is adopted, the first plate and the second plate are rolled to form a prefabricated composite plate, including: heating the first plate to a preset temperature; rolling the first plate and the second plate after the heating treatment; and cold rolling the rolled plate to form a prefabricated composite plate. For example, the first plate can be heated by induction heating, the preset temperature range can be 300-500°C, and the first plate transfers heat to the second plate by heat transfer, wherein the rolling pass reduction can range from 10% to 60%, the cold rolling pass reduction can be 2% to 20%, and the rolling speed can be 50-3000mm / s. The reduction refers to the percentage value of the total thickness change of the plate after rolling to the total thickness before rolling. In the first rolling method, heating is carried out, and the rolling force required is relatively small, which is conducive to processing and forming, and the bonding force after rolling is better.

[0135] By heating it to an appropriate temperature and keeping it warm, the metal and alloy will undergo re-nucleation and crystal nucleus growth, obtaining a structure without internal stress and work hardening. This crystallization process without phase change in solid metals and alloys, that is, the process of softening work-hardened metals and alloys without phase change, is called recrystallization. Cold rolling refers to the rolling process carried out in a temperature range below the recrystallization temperature.

[0136] It can be understood that there is no limitation on the heating method and heating location. For example, the first plate and the second plate can be heated at the same time; there is no limitation on the reduction amount of the rolling pass after heating, there is no limitation on the reduction amount of the cold rolling pass, there is no limitation on the rolling speed; there is no limitation on the type of rolling.

[0137] When the second rolling method (at least two cold rolling passes) is adopted, the arranged first plate and the second plate are cold rolled for at least two passes to form a prefabricated composite plate, for example, the first cold rolling pass has a reduction of 10%-70%, and the subsequent cold rolling passes have a reduction of 2%-20%, and the rolling speed is 50-3000mm / s. It can be understood that there is no limit on the cold rolling reduction and rolling speed. In the second rolling method, since heating is not required during the rolling process, the process is simpler.

[0138] It can be understood that the first plate and the second plate are not limited to being fixedly connected by rolling, and the first plate and the second plate can be fixedly connected by means of adhesive bonding, welding, riveting, etc.

[0139] In some embodiments, Fig.13 As shown, 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 a first metal material.

[0140] In some embodiments, the thickness of the third supporting layer 2003 may be greater than or equal to 0.02 mm.

[0141] Therefore, the third supporting layer 2003 is disposed close to one side of the shell and adopts a material with a higher density, which can further improve the supporting performance of the supporting member.

[0142] In some embodiments, Fig.14 As shown, the support member further includes: a third support portion 2002d, the third support portion 2002d is arranged around the second support layer 2002, and the third support portion 2002d is made of a first metal material.

[0143] Therefore, by providing the third supporting portion, the supporting portion of the second supporting 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 supporting member, thereby better protecting the supporting portion.

[0144] In some embodiments, the bending portion 2002c includes a plurality of through holes. Thus, by providing a through hole penetrating the bending portion 2002c, the bending portion 2002c is made into a hollow area, which can increase the elastic deformation capacity of the bending portion 2002c, reduce the tensile force on the first support portion 2002a and the second support portion 2002b, and share part of the tensile force on the first support portion 2002a and the second support portion 2002b, thereby avoiding the problem of the first support portion 2002a and the second support portion 2002b being broken due to excessive tensile force. In addition, the hollow area can reduce the weight of the flexible display screen support, thereby reducing the weight of the electronic device.

[0145] The embodiment of the present application does not limit the molding process of the through hole of the bending portion 2002c. In some embodiments, a precise chemical etching method can be used to process regular through holes in the bending portion 2002c, so that the bending portion 2002c can be bent repeatedly and smoothly.

[0146] The following takes a double-folded folding screen as an example, and further describes the method for preparing the support member 200 in combination with Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, and Embodiment 5.

[0147] Embodiment 1

[0148] The preparation method provided in Example 1 of this application is shown in Fig.15 , specifically including the following steps:

[0149] S101. Fig.16 As shown, a first plate 200a made of a first metal material and a second plate 200b made of a second metal material are provided.

[0150] The first plate 200a has a surface to be composited, and the second plate 200b has a surface to be composited. The surface to be composited of the first plate 200a and the surface to be composited of the second plate 200b are used to form a rolled composite surface after rolling. The first plate 200a is used to form the first support layer 2001 and the bending portion 2002c, and the second plate 200b is used to form the first support portion 2002a and the second support portion 2002b. The first metal material is different from the second metal material, and the density of the first metal material is greater than the density of the second metal material. In this embodiment, the number of the first plates 200a is two, and the number of the second plates 200b is two. The surface to be composited of the first plate 200a matches the surface to be composited of the second plate 200b.

[0151] In the above embodiment, the first support portion 2002a and the second support portion are made of the same material. In other embodiments, the first support portion 2002a and the second support portion 2002b may be made of different materials.

[0152] In this embodiment, the first plate 200a is made of alloy steel, and the second plate 200b is made of pure aluminum or aluminum alloy. The cross section of the first plate is roughly square.

[0153] S102. Fig.17 As shown, the first plate and the second plate are composite-processed to form the support member 200 .

[0154] The composite support component includes a first support layer 2001 and a bending portion 2002c formed by a first plate material, and a first support portion 2002a and a second support portion 2002b formed by a second plate material. The first support layer 2001 and the second support layer 2002 are arranged along the z direction, the first support portion 2002a and the second support portion 2002b and the bending portion 2002c are arranged along the x direction, and the bending portion 2002c can be bent.

[0155] Thus, the bending portion 2002c of the second supporting layer 2002 is made of the first metal material, which has a relatively high density and can retain the modulus and strength of the steel material, which is beneficial to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display screen 101, and can better support the flexible display screen 101. Among them, after the foldable electronic device is closed, the flexible display screen 101 will sag, and the screen lifting amount refers to the height to which the bending portion 2002c lifts the drooping flexible display screen 101.

[0156] The first support portion 2002a and the second support portion 2002b of the second support layer 2002 provided in this embodiment are made of the second metal material, and the bending portion 2002c is made of the first metal material, and the two are made of metal materials with different characteristics. Among them, the density of the first metal material used to make the bending portion 2002c is greater than the density of the second metal material used to make the support portion, so that the weight of the support portion is relatively light, which is conducive to reducing the weight of the second support layer 2002, and the elastic modulus of the first metal material used to make the bending portion 2002c is greater than the elastic modulus of the second metal material used to make the support portion, so that the bending portion 2002c that can be bent has higher strength and elastic deformation capacity, so that the bending portion 2002c can withstand multiple bending, improve the reliability of the bending portion 2002c, and extend the service life of the support.

[0157] In addition, the above structure forms a high-density-low-density laminated structure in the non-bending area of ​​the support member, and the high-density support layer and the low-density support layer are alternately arranged along the z direction. The high-density support layer has good support performance, which can improve the flatness and rigidity of the flexible display screen 101, while the low-density support layer is light in weight, which is conducive to the thinness of electronic equipment. In this way, by setting a laminated structure of high-density support members and low-density support members, the product is made thinner while ensuring the support performance of the support member, thereby improving the user experience.

[0158] Furthermore, the bending area of ​​the support is made entirely of high-density materials with a high density, which can retain the modulus and strength of steel, so that the bending area has high strength and elastic deformation capacity, so that the bending area can withstand multiple bendings, improve the reliability of the bending area, and extend the service life of the support. The use of the first metal material is conducive to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display screen 101, and can better support the flexible display screen 101.

[0159] In some embodiments, Fig.13 As shown, the support member 200 further includes a third support layer 2003 .

[0160] In step S101, the first plate 200a is also used to form the third supporting layer 2003. The number of the first plate 200a is three, and the number of the second plate 200b is two.

[0161] In step S102, the composite support component further includes a third support layer 2003 formed by the first plate material. The first support layer 2001, the second support layer 2002 and the third support layer 2003 are arranged along the z direction.

[0162] In some embodiments, the thickness of the third supporting layer 2003 may be greater than or equal to 0.02 mm.

[0163] 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 adopts a material with a higher density, the supporting performance of the supporting member can be further improved.

[0164] Taking the first metal material as alloy steel and the second metal material as aluminum alloy as an example, the density of the first metal material is 7.85 g / cm 3 , the density of the second metal material is 2.72g / cm 3 , the density of stainless steel is 7.93g / cm 3 The support member has a length of 160 mm and a width of 145 mm. The thickness of the first support layer is 0.03 mm, the thickness of the second support layer is 0.04 mm, the thickness of the third support layer is 0.03 mm, and the width of the bending portion made of the first metal material is 20 mm.

[0165] Under the same size, the support member 200 prepared in Example 1 of the present application weighs 14.2g, and the support component made entirely of stainless steel weighs about 18.4g. That is, the support member 200 prepared in Example 1 of the present application is about 20% lighter than the stainless steel part, which is conducive to the lightweight and thinning of electronic equipment.

[0166] Embodiment 2

[0167] The steps of the preparation method provided in the second embodiment of the present application are roughly similar to those in the first embodiment, except that the first plate and the second plate selected in step S101 are different. The specific differences from the first embodiment are described below:

[0168] In step S101, the first plate is made of pure titanium or titanium alloy, and the second plate is made of pure aluminum or aluminum alloy.

[0169] Taking the first metal material as titanium alloy and the second metal material as aluminum alloy as an example, the density of the first metal material is 4.54 g / cm 3 , the density of the second metal material is 2.72g / cm 3 , the density of stainless steel is 7.93g / cm 3 The support member has a length of 160 mm and a width of 145 mm. The thickness of the first support layer is 0.03 mm, the thickness of the second support layer is 0.04 mm, the thickness of the third support layer is 0.03 mm, and the width of the bending portion made of the first metal material is 20 mm.

[0170] Under the same size, the support member 200 prepared in Example 2 of the present application weighs 9.1g, and the support component made entirely of stainless steel weighs 18.4g. That is, the support member 200 prepared in Example 2 of the present application is 50% lighter than the stainless steel member, which is conducive to the lightweight and thinning of electronic equipment.

[0171] Embodiment 3

[0172] The steps of the preparation method provided in the third embodiment of the present application are roughly similar to those in the first embodiment, except that the first plate and the second plate selected in step S101 are different, the rolling reduction in step S1073 and the number of cold rolling passes in step S1075, and some processing steps in S203. The following describes the specific differences from the first embodiment:

[0173] In step S101, the first plate is made of titanium alloy, and the second plate is made of pure aluminum.

[0174] Taking the first metal material as titanium alloy and the second metal material as pure aluminum as an example, the density of the first metal material is 4.54 g / cm 3 , the density of the second metal material is 2.7g / cm 3 , the density of stainless steel is 7.93g / cm 3 The support member has a length of 160 mm and a width of 145 mm. The thickness of the first support layer is 0.03 mm, the thickness of the second support layer is 0.04 mm, the thickness of the third support layer is 0.03 mm, and the width of the bending portion made of the first metal material is 20 mm.

[0175] Under the same size, the support member 200 prepared in Example 3 of the present application weighs 9.1g, and the support component made entirely of stainless steel weighs 18.4g. That is, the support member 200 prepared in Example 3 of the present application is 50% lighter than the stainless steel part, which is conducive to the lightweight and thinning of electronic equipment.

[0176] Embodiment 4

[0177] The steps of the preparation method provided in the fourth embodiment of the present application are roughly similar to those in the first embodiment, except that the first plate and the second plate selected in step S101 are different. The specific differences from the third embodiment are described below:

[0178] In step S101, the first plate is made of pure titanium or titanium alloy, and the second plate is made of aluminum-based composite material.

[0179] Compared with the support component made of a single titanium alloy material, the support member 200 prepared in the fourth embodiment of the present application has a lower etching processing cost and a higher strength at the bending portion.

[0180] Taking the first metal material as titanium alloy and the second metal material as aluminum-based composite material as an example, the density of the first metal material is 4.54 g / cm 3 , the density of the second metal material is 2.4g / cm 3 , the density of stainless steel is 7.93g / cm 3 The support member has a length of 160 mm and a width of 145 mm. The thickness of the first support layer is 0.03 mm, the thickness of the second support layer is 0.04 mm, the thickness of the third support layer is 0.03 mm, and the width of the bending portion made of the first metal material is 20 mm.

[0181] Under the same size, the support member 200 prepared in Example 4 of the present application weighs about 8.82g, and the support component made entirely of stainless steel weighs 18.4g, that is, the support member 200 prepared in Example 4 of the present application is about 47% lighter than the stainless steel part, which is conducive to the lightweight and thinning of electronic equipment.

[0182] Embodiment 5

[0183] The steps of the preparation method provided in the fifth embodiment of the present application are roughly similar to those in the first embodiment, except that the first plate and the second plate selected in step S101 are different. The specific differences from the third embodiment are described below:

[0184] In step S101, the first plate is made of pure titanium or titanium alloy, and the second plate is made of magnesium alloy plate, wherein the magnesium alloy plate is easily corroded when in contact with water.

[0185] In some embodiments, the support member further includes a third support portion, which is disposed around the second support layer 2002 and is made of the first metal material.

[0186] Among them, Fig.14 As shown, in step S102 , when forming the second supporting layer 2002 on the first supporting layer 2001 , it includes: forming a third supporting portion 2002 d on the first supporting layer 2001 .

[0187] Therefore, by setting the third support part 2002d, the first support part 2002a and the second support part 2002b with lower 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 member, so as to better protect the support part.

[0188] Taking the first metal material as titanium alloy and the second metal material as magnesium alloy as an example, the density of the first metal material is 4.54 g / cm 3 , the density of the second metal material is 1.8g / cm 3 , the density of stainless steel is 7.93g / cm 3 The support member has a length of 160 mm and a width of 145 mm. The thickness of the first support layer is 0.03 mm, the thickness of the second support layer is 0.04 mm, the thickness of the third support layer is 0.03 mm, and the width of the bending portion made of the first metal material is 20 mm.

[0189] Under the same size, the support member 200 prepared in Example 5 of the present application weighs 8.34g, and the support component made entirely of stainless steel weighs 18.4g. That is, the support member 200 prepared in Example 5 of the present application is about 54% lighter than the stainless steel part, which is conducive to the lightweight and thinning of electronic equipment.

[0190] In the support member provided in the embodiment of the present application, the first support layer and the third support layer are made of a first metal material, which has a high density and provides support for the display screen and the housing, which is conducive to maintaining the flatness and rigidity of the screen and the housing. The first support part and the second support part in the second support layer are made of a second metal material with a low density, so that the weight of the first support part and the second support part is light, which is conducive to reducing the weight of the second support layer. The bending part is made of the first metal material with a high density, can be bent multiple times, and has better bending performance.

[0191] The non-bending area forms a high-density-low-density-high-density laminated structure, and the high-density support layer and the low-density support layer are alternately arranged along the z direction. The high-density support layer has good support performance, which can improve the flatness and rigidity of the flexible display screen 101 and the shell, while the low-density support layer is light in weight, which is conducive to the thinness of the electronic device. In this way, by setting a laminated structure of high-density support members and low-density support members, the product is thinned while ensuring the support performance of the support members, thereby improving the user experience. In addition, the bending area of ​​the support member is made entirely of high-density materials with a large density, which 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 bendings, improve the reliability of the bending area, and extend the service life of the support member. And the use of the first metal material is conducive to increasing the screen lifting amount, reducing the collision between the hinge mechanism and the flexible display screen 101, and can better support the flexible display screen 101.

[0192] An electronic device is also provided in an embodiment of the present application, wherein 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. The device is made of a high-density material, which is conducive to bending, and forms a non-bending zone in the non-bending portion 2002c of the support member. The structure of alternating high-density and low-density is adopted, which can take into account both supporting performance and lightness.

[0194] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope 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 metal 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 metal material, the first support portion and the second support portion are made of a second metal material, the density of the first metal material is greater than the density of the second metal material, and the support member is formed by rolling.

2. The support member according to claim 1, characterized in that The flatness of the surface of the first supporting layer close to the display screen is less than 0.1 mm.

3. The support member according to claim 1 or 2, characterized in that: The surface where the bending portion is connected to the first supporting portion is a stepped surface, and the first supporting portion matches the bending portion.

4. The support member according to any one of claims 1 to 3, characterized in that: The first metal material is made of alloy steel, and the second metal material is made of pure aluminum or aluminum alloy.

5. The support member according to any one of claims 1 to 3, characterized in that: The first metal material is made of pure titanium or titanium alloy, and the second metal material is made of pure aluminum or aluminum alloy.

6. The support member according to any one of claims 1 to 3, characterized in that: The first metal material is made of pure titanium or titanium alloy, and the second metal material is made of aluminum-based composite material.

7. The support member according to any one of claims 1 to 3, characterized in that: The first metal material is made of pure titanium or titanium alloy, and the second metal material is made of pure magnesium or magnesium alloy.

8. The support member according to any one of claims 1 to 7, 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.

9. The support member according to any one of claims 1 to 8, characterized in that: The support member further includes: a third support layer, which is disposed on a side of the second support layer away from the first support layer, and is made of the first metal 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 metal 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: Providing a first plate made of a first metal material and a second plate made of a second metal material, wherein the density of the first metal material is greater than the density of the second metal material; Composite processing of the first plate and the second plate forms a support member; The support member includes: a first support layer and a second support layer which are stacked, the first support layer is made of the first plate 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 plate material, and the first support portion and the second support portion are made of the second plate material.

19. The preparation method according to claim 18, characterized in that: The step of processing the first plate and the second plate into a support member comprises: The first plate and the second plate are cold rolled to form a support member.

20. The preparation method according to claim 19, characterized in that: Before cold rolling the first plate and the second plate, the method further comprises: The first sheet and the second sheet are extruded in an extruder.

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