Supporting structural member, display screen assembly and electronic equipment

Abstract

The invention provides a supporting structural member, a display screen assembly and electronic equipment. The supporting structural member comprises a metal layer and a non-metal layer; wherein the metal layer comprises a bending part and a supporting part which are arranged in an integrated structure, the bending part is arranged corresponding to a bending area of the folding screen, and the supporting part is arranged corresponding to a non-bending area of the folding screen; on the side facing the folding screen, the bending part and the supporting part are arranged in a coplanar mode, and the thickness of the supporting part is smaller than that of the bending part. The non-metal layer is arranged on the surface of the side, away from the folding screen, of the supporting part or arranged in the supporting part, and the density of the non-metal layer is smaller than that of the metal layer. Therefore, the supporting structural member which is light in weight, light, thin and high in supporting performance is obtained.

Description

Technical Field

[0001] The present application relates to the field of folding devices, and in particular to a supporting structure, a display screen assembly and an electronic device. Background Art

[0002] In a folding screen, one or more metal layers are usually arranged under the flexible display screen as an under-screen support structure to maintain sufficient flatness and rigidity of the flexible display screen. The materials of existing support structures are mainly metals: stainless steel, copper alloy, titanium alloy or aluminum alloy. The main problems are high density and heavy weight. In order to reduce the weight of the support structure, there is an existing support structure that is a fiber composite material, such as carbon fiber, glass fiber, aramid fiber, ceramic fiber and other composite materials, which have low density and very obvious weight reduction benefits. However, due to the elastic modulus of the fiber material after being composited with the resin, that is, the stiffness performance has certain disadvantages compared to metal. Under the premise of the development of thinning electronic equipment, it cannot meet the supporting function. In order to achieve the functions of weight reduction and strong support, an existing composite support structure is made by splicing fiber composite materials and metal. Among them, the metal material is used as the bending part of the support structure, the fiber composite material is used as the supporting part of the support structure, and the metal material and the fiber composite material are made by splicing or overlapping, and its structure is as follows Figure 1 and Figure 2 As shown. In the support structure, the bending part 21 and the supporting part 22 are separate structures, and after the two are spliced ​​or overlapped, steps or gaps will inevitably be generated on the side facing the folding screen. The existence of steps and gaps will affect the display problem of the folding screen, and it is easy to have light and shadow problems on the display interface. Therefore, the current support structure cannot meet the requirements of not affecting the high-quality display effect of the folding screen on the basis of thinning and weight reduction. Summary of the invention

[0003] The present application provides a supporting structure, a display screen assembly and an electronic device to obtain a supporting structure that is lightweight, thin and does not affect the display effect of the folding screen.

[0004] In a first aspect, the present application provides a support structure for a folding screen, the support structure comprising a metal layer and a non-metal layer; wherein the metal layer comprises a bending portion and a supporting portion arranged in an integral structure, the bending portion is arranged corresponding to the bending area of ​​the folding screen, and the supporting portion is arranged corresponding to the non-bending area of ​​the folding screen; on the side facing the folding screen, the bending portion and the supporting portion are arranged in the same plane, and the thickness of the supporting portion is less than the thickness of the bending portion. The non-metal layer is arranged on the surface of the supporting portion on the side away from the folding screen or is arranged inside the supporting portion, and the density of the non-metal layer is less than the density of the metal layer.

[0005] In the supporting structure of the embodiment of the present application, the bending portion provided in the bending area corresponding to the folding screen and the supporting portion provided in the non-bending area corresponding to the folding screen are metal layers of an integrated structure. The bending portion can realize the bending function and at the same time support the folding screen in the bending area. The supporting portion supports the non-bending area of ​​the folding screen. Among them, since the bending portion and the supporting portion are an integrated structure, and the surface on the side facing the folding screen is arranged in an equiplanar manner, there is no connecting step or connecting gap between the two, which can effectively eliminate the light and shadow problem of the folding screen. In addition, a non-metallic layer can be provided on the surface of the side of the supporting portion facing away from the folding screen or inside thereof, and the density of the non-metallic layer is less than that of the metal layer. Therefore, the non-metallic layer can be used to reduce weight without affecting the supporting strength of the supporting structure.

[0006] In an optional implementation, the thickness of the non-metallic layer is ≥ 0.03 mm to achieve a weight reduction effect.

[0007] In an optional implementation, the elastic modulus of the metal layer is ≥65 GPa. Selecting a metal material with a high elastic modulus as the metal layer can provide high-strength support.

[0008] In an optional implementation, the thickness of the bent portion is ≥ 0.08 mm to provide high-strength support.

[0009] In an optional implementation, the support portion includes a first metal sublayer and a second metal sublayer, the first metal sublayer and the second metal sublayer are sequentially stacked in the thickness direction of the support portion, and the non-metal layer is disposed between the first metal sublayer and the second metal sublayer. In this structure, the metal layer forms an I-shaped structure, and the non-metal layer is disposed inside the support portion, that is, between the first metal sublayer and the second metal sublayer.

[0010] In an optional implementation, the thickness of the first metal layer is ≥ 0.02 mm, and the thickness of the second metal sublayer is ≥ 0.02 mm. Selecting a folding plate with a high elastic modulus can make the thickness of the folding plate thinner and provide stronger support.

[0011] In an optional implementation, the sum of the thickness of the support portion and the thickness of the non-metallic layer is equal to the thickness of the bending portion, so that the support structure maintains a high degree of flatness.

[0012] In an optional implementation, the bending portion is provided with an array of openings for bending, and each opening in the array of openings is a long strip opening or a special-shaped hole. When the opening is a long strip hole, the width of the opening is 0.03-0.5 mm, the hole spacing is 0.03-0.5 mm, and the hole length is 0.1-20 mm. By providing an array of openings, it can help the bending plate to bend and reduce the release of internal stress of the bending plate during the bending process.

[0013] In an optional implementation, the material of the non-metallic layer includes at least one of a polymer material, a fiber composite material or an inorganic non-metallic material. The polymer material includes at least one of epoxy resin, polycarbonate, acrylic resin, polyphenylthioamidine and polyetheretherketone. The fiber composite material includes at least one of a carbon fiber composite material, a glass fiber composite material, an organic fiber composite material and a ceramic fiber composite material. The inorganic non-metallic material includes one of glass, ceramic and sapphire.

[0014] In an optional implementation, the non-metallic layer and the support portion are connected by bonding, hot pressing or soldering.

[0015] Among them, the data in the above-mentioned possible implementation methods of the present application, such as the thickness of the bending portion, the thickness of the non-metallic layer, the elastic modulus of the metal layer, etc., when measuring, the values ​​within the scope of engineering measurement error should be understood to be within the scope specified in the present application.

[0016] In a second aspect, the present application provides a method for manufacturing a supporting structure, which comprises: providing a metal plate, wherein a surface of the metal plate facing the folding screen is a planar structure, and the metal plate is divided into a bending portion and a supporting portion, the bending portion is arranged corresponding to a bending area of ​​the folding screen, and the supporting portion is arranged corresponding to a non-bending area of ​​the folding screen; performing thinning processing on the metal plate corresponding to the supporting portion, and arranging a non-metallic layer in the thinned portion of the metal plate, and the density of the non-metallic layer is less than the density of the metal layer.

[0017] The manufacturing method of the embodiment of the present application utilizes the same metal plate to process and manufacture the bending portion and the supporting portion, and the formed supporting structure is formed by the bending portion provided in the bending area corresponding to the folding screen and the supporting portion provided in the non-bending area corresponding to the folding screen as an integrated structure. The bending portion can realize the bending function and at the same time support the folding screen in the bending area. The supporting portion supports the non-bending area of ​​the folding screen. Among them, since the bending portion and the supporting portion are an integrated structure, and the surface on the side facing the folding screen is arranged in a plane, there is no connecting step or connecting gap between the two, which can effectively eliminate the light and shadow problem of the folding screen. In addition, a non-metallic layer can be provided on the surface of the side of the supporting portion facing away from the folding screen or inside thereof, and the density of the non-metallic layer is less than the density of the metal layer. Therefore, the non-metallic layer can be used to reduce weight without affecting the supporting strength of the supporting structure.

[0018] In an optional implementation, the material of the metal plate includes at least one of stainless steel, titanium alloy, aluminum alloy, alloy steel or metal-based composite material.

[0019] In an optional implementation, in a plane perpendicular to the thickness direction of the metal plate, a groove is formed extending from the side wall of the metal plate toward the bending portion, and the metal layer corresponding to the support portion forms a first metal sublayer and a second metal sublayer; a non-metallic material is filled in the groove to form a non-metallic layer between the first metal sublayer and the second metal sublayer. The support portion and the non-metallic layer form a three-layer laminated structure, which can help further improve the support performance of the support portion.

[0020] In a third aspect, the present application provides a display screen assembly, which includes a folding screen and a supporting structure as in the first aspect of the present application, wherein the folding screen includes a bending area and a non-bending area, the bending plate is connected to the bending area, and the first metal layer is connected to the non-bending area.

[0021] In a fourth aspect, the present application provides an electronic device, including the display screen assembly of the present application.

[0022] The technical effects that can be achieved by the second to fourth aspects mentioned above can be described with reference to the corresponding effects in the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a splicing structure of an existing supporting structure;

[0024] Figure 2 It is a schematic diagram of a lap joint structure of an existing supporting structure;

[0025] Figure 3 It is a structural schematic diagram of an electronic mobile phone;

[0026] Figure 4 It is a structural schematic diagram of a display screen assembly;

[0027] Figure 5 A schematic structural diagram of a supporting structure according to an embodiment;

[0028] Figure 6 It is a schematic diagram of the structure of an opening on a folding plate;

[0029] Figure 7 This is a schematic structural diagram of a supporting structure according to another embodiment of the present application.

[0030] Reference numerals:

[0031] 01-housing, 011-first housing; 012-second housing; 02-display assembly; 03-folding hinge;

[0032] 10-folding screen; 20-supporting structure; 21-metal layer; 211-opening; 212-bending part; 213-supporting part; 214-first metal sublayer;

[0033] 215 - second metal sublayer; 22 - non-metal layer. DETAILED DESCRIPTION

[0034] 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.

[0035] Figure 3 It is a schematic diagram of the structure of an electronic device. Figure 3 As shown, a foldable electronic device, such as a foldable mobile phone, may include a housing 01, a display assembly 02, and a folding hinge 03, and may also include components such as a processor and a battery. The folding hinge 03 may be connected to the display assembly 02 to drive the display assembly 02 to fold and unfold. For a foldable mobile phone that folds in two, the housing 01 may include a first housing 011 and a second housing 012. The folding hinge 03 is disposed between the first housing 011 and the second housing 012 and is used to drive the first housing 011 and the second housing 012 to rotate relative to each other.

[0036] Figure 4 Schematic diagram of the structure of a display screen assembly. Figure 4As shown, the display screen assembly 02 generally includes a folding screen 10 and a supporting structure 20. The supporting structure 20 can be bonded to the folding screen 10 by an adhesive. The folding screen 10 can be divided into a bending area and a non-bending area. The non-bending area includes two parts, a first non-bending area and a second non-bending area. The first non-bending area is arranged corresponding to the first shell, and the second non-bending area is arranged corresponding to the second shell. The bending area is located between the first non-bending area and the second non-bending area. Since the folding screen 10 is a flexible display screen, a supporting structure 20 is generally arranged below the folding screen 10. By arranging the supporting structure 20, the folding screen 10 can have sufficient flatness and rigidity after being folded or unfolded.

[0037] Figure 5 FIG. 1 is a schematic diagram of a supporting structure of an embodiment. Figure 5 As shown, the supporting structure 20 of the embodiment of the present application includes a metal layer 21 and a non-metal layer 22. Among them, the metal layer 21 includes a bending portion 212 and a supporting portion 213. The bending portion 212 and the supporting portion 213 are an integral structure, and the two together form the metal layer 21. The bending portion 212 is arranged in a bending area corresponding to the folding screen. The supporting portion 213 is arranged in a non-bending area corresponding to the folding screen. On the side connected to the folding screen, the surface of the metal layer 21 is a plane, that is, the bending portion 212 and the supporting portion 213 are arranged in the same plane. The bending portion 212 and the supporting portion 213 are arranged in the same plane, which can better fit the folding screen and prevent light and shadow problems due to the height difference between the bending portion 212 and the supporting portion 213. Among them, it can be understood that the length direction of the bending portion 212 is the length direction of the folding hinge.

[0038] The bending portion and the supporting portion are explained below respectively.

[0039] Reference Figure 4 , the bending portion 212 is arranged in the middle position of the folding screen. When the folding screen switches between the folded state and the unfolded state, the bending portion 212 may bend and flatten accordingly. In the embodiment of the present application, the bending portion 212 is a metal material, and its elastic modulus is ≥65GPa. Exemplarily, the bending portion 212 may be made of metal such as stainless steel, titanium alloy, aluminum alloy, alloy steel or metal-based composite material. The bending portion 212 mainly utilizes the high modulus characteristics of the metal material to achieve a high rigidity design of the bending portion in the bending zone. The thickness of the bending portion 212 is ≥0.08mm, such as between 0.08-0.2mm, and its length direction is consistent with the length direction of the folding hinge.

[0040] The bending function of the bending portion 212 can be achieved by providing an opening in the middle of the metal layer 21. Figure 6 Figure 1 is a schematic diagram of the structure of an opening on a folding plate. Figure 6As shown, the openings 211 of the bent portion 212 can form an opening array, and each opening 211 in the opening array is a long strip opening or a special-shaped hole. When the opening 211 is a long strip opening, the width of the opening 211 is 0.05-0.3 mm, the hole spacing is 0.05-0.3 mm, and the hole length is 0.2-20 mm. The openings 211 in the folding plate 21 can be formed by etching or laser cutting, for example.

[0041] Continue to refer to Figure 5 , the support portion 213 is arranged corresponding to the non-bending area of ​​the folding screen. The thickness of the metal layer corresponding to the support portion 213 is less than the thickness of the metal layer corresponding to the bending portion 212. Figure 4 In the structure shown, the support portion 213 only includes the first metal sublayer 214. The thickness of the first metal sublayer 214 is less than the thickness of the bending portion 212. Figure 3 The support portion 213, namely the first metal sublayer 214, is connected to the folding screen. The two can be bonded by an adhesive. The thickness of the first metal sublayer 214 is ≥ 0.03 mm.

[0042] Continue to refer to Figure 5 The non-metal layer 22 may be disposed on a surface of the first metal sub-layer 214 that is away from the folding screen. The connection between the non-metal layer 22 and the first metal sub-layer 214 includes bonding, hot pressing or soldering.

[0043] The sum of the thickness of the first metal sublayer 214 and the thickness of the non-metal layer 22 is the same as the thickness of the bending portion 212. The density of the non-metal layer is less than that of the metal layer to achieve weight reduction. The thickness of the non-metal layer is ≥ 0.03 mm.

[0044] Among them, the material of the non-metallic layer 22 may be at least one of a polymer material, a fiber composite material or an inorganic non-metallic material. Among them, the polymer material may include, for example, a resin, a resin-based fiber composite material, etc. Among them, the resin may be one of epoxy resin, polycarbonate, acrylic resin, polyphenylthiocarbamide or polyetheretherketone, etc. The resin-based fiber composite material may be at least one of a carbon fiber composite material, a glass fiber composite material, an organic fiber composite material and a ceramic fiber composite material. Exemplarily, the resin-based fiber composite material may be a fiber composite material based on the above resin. The fiber may be a carbon fiber, a glass fiber, an aramid fiber, a ceramic fiber, etc., and the monofilament diameter of the fiber is ≥3μm, and the elastic modulus is ≥80GPa. Among them, the fiber may be a layer of fiber woven by mixing one or more of the above fibers, or may be a layer of unidirectional fibers woven by laying at different angles and then hot pressing. In the woven fiber, the weaving method may be any form of weaving process such as plain weave, twill satin weave, etc. Among them, whether it is a woven fiber or a unidirectional fiber pre-impregnated resin-based fiber cloth, the mass fraction of the resin is ≥20%. The inorganic non-metallic material includes one of glass, ceramic and sapphire. Among them, the density of glass, ceramics and sapphire needs to be lower than the density of the metal layer.

[0045] Figure 5 The supporting structure of the structure shown can be prepared by the following method:

[0046] Step S11, providing a metal plate, such as a stainless steel plate, an aluminum alloy plate, a titanium alloy plate, an alloy steel or a metal matrix composite material plate, wherein a surface of the metal plate facing the folding screen is a planar structure, and an opening is provided at a portion corresponding to the bending area of ​​the folding screen to form a bending portion 212;

[0047] Step S12: thinning and etching are performed on the portion corresponding to the non-bending area of ​​the folding screen to form the first metal sublayer 214. After thinning and etching, plasma treatment is performed on the surface of the first metal sublayer 214 and the bending portion 212 facing the folding screen to increase the surface tension of the first metal sublayer 214. After plasma treatment, the dyne value of the metal layer 21 is ≥36A.

[0048] Step S13, after hot pressing, the resin or resin-based fiber composite material is bonded to the surface of the first metal sublayer 214 on the side away from the folding screen by gluing; or the resin or resin-based fiber composite material is laid on the surface of the first metal sublayer 214 on the side away from the folding screen according to the designed number of layers and angles, and then hot pressed to be fixedly connected to the first metal sublayer 214. Before bonding and hot pressing, the surface of the first metal sublayer 214 can be plasma or sandblasted to increase the surface roughness and further increase the surface adhesion.

[0049] Figure 7This is a schematic diagram of the structure of a supporting structure of another embodiment of the present application. Figure 7 As shown, Figure 5 The support structures shown differ in that Figure 7 The support portion 213 of the support structure shown includes a second metal sublayer 215 in addition to a first metal sublayer 214. The non-metal layer 22 is disposed between the first metal sublayer 214 and the second metal sublayer 215. The first metal sublayer 214, the polymer layer 222 and the second metal sublayer 215 are stacked in sequence to form a sandwich structure. In this structure, the metal layer 21 formed by the first metal sublayer 214, the second metal sublayer 215 and the bending portion 212 is an I-shaped structure. The non-metal layer 22 is filled between the first metal sublayer 214 and the second metal sublayer 215.

[0050] Figure 7 The supporting structure of the structure shown can be obtained by the following method.

[0051] Step S21, providing a metal plate, dividing the metal plate into a bending area and a supporting area according to the bending area and the non-bending area of ​​the folding screen, processing a hole in the bending area, and processing a gap layer in the support area from the side wall of the metal plate toward the bending area in a direction parallel to the plate surface of the metal plate. The processing method of the gap layer includes etching or diamond wire cutting.

[0052] Step S22 , filling the gap layer with non-metallic material to form a non-metallic layer 22 .

[0053] The following is an explanation of the effect of reducing the thickness and weight of the supporting structure of the present application in conjunction with specific embodiments.

[0054] Example 1

[0055] Reference Figure 5 The supporting structure of this embodiment has the following steps in its preparation process:

[0056] Step Sa1, provide a stainless steel plate with a thickness of 0.15 mm and a modulus ≥ 180 GPa; divide the stainless steel plate into a bending area and a supporting area according to the bending area and non-bending area of ​​the folding screen.

[0057] Step Sa2: make holes in the bending area with a pore size of 0.12 mm and a hole spacing of 0.25 mm.

[0058] Step Sa3: In the support area, a metal plate is etched on the side facing away from the folding screen, and the thickness of the metal plate is reduced by 0.1 mm. After etching, a plasma treatment is performed on the surface of the metal plate facing the folding screen to make its dyne value ≥ 36A.

[0059] Step Sa4: lay the resin-based fiber cloth of the carbon fiber unidirectional prepreg with a three-layer symmetrical structure of 0°-90°-0° layer by layer on the surface of the metal plate in the support area, and then hot-press it in a mold and fix it to the metal plate to obtain a support structure. The resin content in the single-layer resin-based fiber cloth is 30%, and the single-layer thickness is 0.033 mm.

[0060] The supporting structure, taking the size of 140*155mm as an example, has the following advantages:

[0061] 1) Compared with the stainless steel integrated solution, it can achieve a weight reduction of 9.7g;

[0062] 2) Compared with the titanium alloy integrated solution, it can achieve a weight reduction of 2.3g;

[0063] 3) Compared with the carbon fiber integrated solution, the stiffness is increased by >20%.

[0064] Example 2

[0065] The supporting structure of this embodiment is different from that of Embodiment 1 in that the initial metal plate is a titanium alloy metal plate with an elastic modulus of ≥110 GPa. The other preparation processes are the same as those of Embodiment 1.

[0066] The supporting structure, taking the size of 140*155mm as an example, has the following advantages:

[0067] 1) Compared with the stainless steel integrated solution, it can reduce weight by 11.8g;

[0068] 2) Compared with the titanium alloy integrated solution, it can achieve a weight reduction of 4.5g;

[0069] 3) Compared with the carbon fiber integrated solution, the stiffness is increased by >10%.

[0070] Example 3

[0071] Reference Figure 6 The supporting structure of this embodiment has the following steps in its preparation process:

[0072] Step Sa1: Provide an aluminum-based composite plate with a thickness of 0.15 mm and a modulus ≥ 90 GPa. Divide the stainless steel plate into a bending area and a supporting area according to the bending area and non-bending area of ​​the folding screen.

[0073] Step Sa2: make holes in the bending area with a pore size of 0.12 mm and a hole spacing of 0.25 mm.

[0074] Step Sa3: In the support area, a gap layer is processed from the side wall of the metal plate toward the bending area. The processing method of the gap layer includes etching or diamond wire cutting. The thickness of the gap layer is 0.09 mm. The thickness of the first metal layer and the second metal layer formed on both sides of the gap layer is 0.03 mm. Plasma treatment is performed on the surface of the first metal layer facing the folding screen to make its dyne value ≥ 36A.

[0075] Step S a4: filling the void layer with polyetheretherketone material to form a non-metallic layer.

[0076] The supporting structure, taking the size of 140*155mm as an example, has the following advantages:

[0077] 1) Compared with the stainless steel integrated solution, it can reduce weight by 11.4g;

[0078] 2) Compared with the titanium alloy integrated solution, it can reduce weight by 4g;

[0079] 3) Compared with the carbon fiber integrated solution, the stiffness is increased by >10%.

[0080] Example 4

[0081] Reference Figure 6 The supporting structure of this embodiment is different from that of Embodiment 3 in that the initial metal plate is a stainless steel metal plate with an elastic modulus of ≥180 GPa. The other preparation processes are the same as those of Embodiment 3.

[0082] The supporting structure, taking the size of 140*155mm as an example, has the following advantages:

[0083] 1) Compared with the stainless steel integrated solution, it can reduce weight by 8.7g;

[0084] 2) Compared with the titanium alloy integrated solution, it can achieve a weight reduction of 1.4g;

[0085] 3) Compared with the carbon fiber integrated solution, the stiffness is increased by >20%.

[0086] In summary, the support structure of the present application achieves high rigidity in the bending area and lightness in the non-bending area by combining the metal layer and the non-metal layer. The support structure provided by the embodiment of the present application is to meet the development needs of thinness and lightness. At the same time, the bending part and the non-bending part of the integrated structure are used as metal layers to reduce light and shadow problems.

[0087] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which 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 supporting structure, characterized in that: It includes a metal layer and a non-metal layer; wherein, The metal layer includes a bending portion and a supporting portion arranged in an integral structure, the bending portion is arranged corresponding to the bending area of ​​the folding screen, and the supporting portion is arranged corresponding to the non-bending area of ​​the folding screen; on a side facing the folding screen, the bending portion and the supporting portion are arranged in the same plane, and the thickness of the supporting portion is less than the thickness of the bending portion; The non-metal layer is arranged on a surface of the support portion facing away from the folding screen or inside the support portion, and the density of the non-metal layer is less than the density of the metal layer.

2. The supporting structure according to claim 1, characterized in that: The thickness of the non-metallic layer is ≥0.03 mm.

3. The supporting structure according to claim 1 or 2, characterized in that: The elastic modulus of the metal layer is ≥65 Gpa.

4. The supporting structure according to any one of claims 1 to 3, characterized in that: The thickness of the bent portion is ≥0.08 mm.

5. The supporting structure according to any one of claims 1 to 4, characterized in that: The support portion includes a first metal sublayer and a second metal sublayer, which are sequentially stacked in a thickness direction of the support portion, and the non-metal layer is disposed between the first metal sublayer and the second metal sublayer.

6. The supporting structure according to claim 5, characterized in that: The thickness of the first metal sublayer is ≥0.02 mm, and the thickness of the second metal sublayer is ≥0.02 mm.

7. The supporting structure according to any one of claims 1 to 6, characterized in that: The connection method between the non-metallic layer and the support portion includes bonding, hot pressing or soldering.

8. The supporting structure according to any one of claims 1 to 7, characterized in that: The sum of the thickness of the support portion and the thickness of the non-metal layer is equal to the thickness of the bending portion.

9. The supporting structure according to any one of claims 1 to 8, characterized in that: The bending portion is provided with an array of openings for bending, and each opening in the array of openings is a long strip opening or a special-shaped hole; The opening is a long strip-shaped hole, the width of the opening is 0.03-0.5 mm, the hole spacing is 0.03-0.5 mm, and the hole length is 0.1-20 mm.

10. The supporting structure according to any one of claims 1 to 9, characterized in that: The material of the non-metallic layer includes at least one of a polymer material, a fiber composite material or an inorganic non-metallic material; The polymer material includes at least one of epoxy resin, polycarbonate, acrylic resin, polyphenylthioamidine and polyetheretherketone; The fiber composite material includes at least one of a carbon fiber composite material, a glass fiber composite material, an organic fiber composite material and a ceramic fiber composite material; The inorganic non-metallic material includes one of glass, ceramic and sapphire.

11. A method for manufacturing a supporting structure, characterized in that: include: A metal plate is provided, wherein a surface of the metal plate facing the folding screen is a planar structure, and the metal plate is divided into a bending portion and a supporting portion, wherein the bending portion is arranged corresponding to a bending area of ​​the folding screen, and the supporting portion is arranged corresponding to a non-bending area of ​​the folding screen; The metal plate corresponding to the support portion is thinned, and a non-metal layer is provided at the thinned portion of the metal plate, wherein the density of the non-metal layer is less than that of the metal layer.

12. The manufacturing method according to claim 11, characterized in that: The material of the metal plate includes at least one of stainless steel, titanium alloy, aluminum alloy, alloy steel or metal matrix composite material.

13. The production method according to claim 11 or 12, characterized in that: In a plane perpendicular to the thickness direction of the metal plate, a groove is extended from the side wall of the metal plate toward the bending portion, and the metal layer corresponding to the support portion forms a first metal sublayer and a second metal sublayer; a non-metallic material is filled in the groove to form a non-metallic layer between the first metal sublayer and the second metal sublayer.

14. A display screen assembly, characterized in that: It comprises a folding screen and a supporting structure as described in any one of claims 1-10, wherein the folding screen comprises a bending area and a non-bending area, the bending plate is connected to the bending area, and the first metal layer is connected to the non-bending area.

15. An electronic device, characterized in that: Includes the display screen assembly as claimed in claim 14.

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