Folding screen and electronic device

Abstract

The application provides a folding screen, which comprises a panel, a first liquid film layer, a protective layer, a second liquid film layer and a supporting layer, the panel comprises a light-emitting surface and a back surface arranged oppositely, the first liquid film layer is arranged on the light-emitting surface of the panel, the protective layer is laminated on the surface of the first liquid film layer away from the panel, the first liquid film layer is interfacially adsorbed on the panel and the protective layer respectively, the second liquid film layer is arranged on the back surface of the panel, the supporting layer is laminated on the surface of the second liquid film layer away from the panel, and the second liquid film layer is interfacially adsorbed on the panel and the supporting layer respectively. The application also provides an electronic device provided with the folding screen.

Description

Technical Field

[0001] This invention relates to the field of electronic devices, and more particularly to a foldable screen with improved flatness, and an electronic device equipped with said foldable screen. Background Technology

[0002] With the development of display devices, foldable screens have emerged, and foldable screen devices are becoming increasingly popular due to their unique shapes and diverse functions. Related technologies allow foldable screens to bend into a teardrop shape. Currently, foldable screen devices are trending towards thinner and lighter designs, resulting in increasingly thinner screens. However, this also compresses the space for hinges and the rigidity and deformation control of hinge components. Because of the reduced design space, the teardrop shape during bending causes more severe bending strain, significantly increasing the redundancy between layers and impacting the user's aesthetic experience.

[0003] Currently, the conventional solutions for foldable screens on the market involve the cross-coating of multiple film layers and multiple adhesive layers to meet the requirements of the folding and flattening movements of the screen, the stress-strain balance between the layers, and the mechanical impact resistance of the front and back of the screen assembly. However, as foldable screens continue to evolve towards thinner and lighter designs, the relative redundancy of the existing screen-to-screen technology in the bending area is too high, and crease control is becoming increasingly poor. Summary of the Invention

[0004] This application provides a foldable screen and an electronic device equipped with the foldable screen.

[0005] This application provides a foldable screen, which includes a panel, a first liquid film layer, a protective layer, a second liquid film layer, and a support layer. The panel includes a light-emitting surface and a back surface disposed opposite to each other. The first liquid film layer is disposed on the light-emitting surface of the panel. The protective layer is stacked on the surface of the first liquid film layer opposite to the panel. The first liquid film layer is adsorbed onto the panel and the protective layer at their respective interfaces. The second liquid film layer is disposed on the back surface of the panel. The support layer is stacked on the surface of the second liquid film layer opposite to the panel. The second liquid film layer is adsorbed onto the panel and the support layer at their respective interfaces.

[0006] This application also provides an electronic device comprising a foldable screen and a folding housing. The foldable screen includes a panel, a first liquid film layer, a protective layer, a second liquid film layer, and a support layer. The panel includes a light-emitting surface and a back surface disposed opposite to each other. The first liquid film layer is disposed on the light-emitting surface of the panel. The protective layer is stacked on the surface of the first liquid film layer opposite to the panel. The first liquid film layer is adsorbed onto the panel and the protective layer at their respective interfaces. The second liquid film layer is disposed on the back surface of the panel. The support layer is stacked on the surface of the second liquid film layer opposite to the panel. The second liquid film layer is adsorbed onto the panel and the support layer at their respective interfaces. The foldable screen includes a bendable area and two non-bendable areas. The bendable area is located between the two non-bendable areas. The folding housing includes a folding device and two frames. The two frames are respectively connected to opposite sides of the folding device. The foldable screen covers the front of the folding housing. The two non-bendable areas are respectively connected to the two frames. The bendable area faces the folding device.

[0007] The foldable screen of this application replaces the traditional adhesive layer in existing foldable screens with a first liquid film layer and a second liquid film layer. The thickness of both the first and second liquid film layers is less than that of the traditional adhesive layer, thus significantly reducing the overall thickness of the foldable screen. This achieves a low-fault effect, improving creases and enhancing bending reliability. Secondly, both the first and second liquid film layers have ultra-low modulus characteristics, resulting in an ultra-thin, low-damping, and low-fault foldable screen. During the process of unfolding from the folded state to the flattened state, the first and second liquid film layers can return to their original state extremely quickly, eliminating the redundancy of the traditional adhesive layer and achieving near-zero creases, thus improving the user experience. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a three-dimensional structural diagram of the folding screen in the first embodiment of this application;

[0010] Figure 2 yes Figure 1 A cross-sectional view of the foldable screen in the image;

[0011] Figure 3 yes Figure 2 An exploded view of the foldable screen in the image;

[0012] Figure 4 yes Figure 2 A further detailed structural diagram of the foldable screen in the image;

[0013] Figure 5 yes Figure 1 A schematic diagram of the front structure of the foldable screen in the image;

[0014] Figure 6 yes Figure 1 A 3D structural diagram of the foldable screen in its combined state;

[0015] Figure 7 yes Figure 6 A side view of the foldable screen in the image;

[0016] Figure 8 This is a cross-sectional schematic diagram of the folding screen in the second embodiment of this application;

[0017] Figure 9 yes Figure 8 An exploded view of the foldable screen in the image;

[0018] Figure 10 This is a cross-sectional schematic diagram of the folding screen in the third embodiment of this application;

[0019] Figure 11 yes Figure 10 An exploded view of the foldable screen in the image;

[0020] Figure 12 This is a cross-sectional schematic diagram of the folding screen in the fourth embodiment of this application;

[0021] Figure 13 yes Figure 12 An exploded view of the foldable screen in the image;

[0022] Figure 14 This is a cross-sectional schematic diagram of the folding screen in the fifth embodiment of this application;

[0023] Figure 15 yes Figure 14 An exploded view of the foldable screen in the image;

[0024] Figure 16 This is a cross-sectional schematic diagram of the folding screen in the sixth embodiment of this application;

[0025] Figure 17 yes Figure 16 An exploded view of the foldable screen in the image;

[0026] Figure 18 yes Figure 16 A schematic diagram of the front structure of the foldable screen in the image;

[0027] Figure 19 This is a cross-sectional schematic diagram of the folding screen in the seventh embodiment of this application;

[0028] Figure 20 yes Figure 19 An exploded view of the foldable screen in the image;

[0029] Figure 21 This is a cross-sectional schematic diagram of the folding screen in the eighth embodiment of this application;

[0030] Figure 22 yes Figure 21 An exploded view of the foldable screen in the image;

[0031] Figure 23 This is a cross-sectional schematic diagram of the folding screen in the ninth embodiment of this application;

[0032] Figure 24 yes Figure 23 An exploded view of the foldable screen in the image;

[0033] Figure 25 This is a cross-sectional schematic diagram of the folding screen in the tenth embodiment of this application;

[0034] Figure 26 yes Figure 25 An exploded view of the foldable screen in the image;

[0035] Figure 27 This is a three-dimensional structural schematic diagram of an electronic device according to one embodiment of this application;

[0036] Figure 28 yes Figure 27 A three-dimensional exploded view of the electronic equipment in the diagram;

[0037] Figure 29 yes Figure 28 A further exploded three-dimensional structural diagram of the electronic equipment in the diagram;

[0038] Figure 30 yes Figure 27 A cross-sectional schematic diagram of the electronic equipment in the diagram;

[0039] Figure 31 yes Figure 27 A three-dimensional structural diagram of the combined state of electronic devices in the diagram;

[0040] Figure 32 yes Figure 31 A cross-sectional schematic diagram of the electronic equipment in the diagram.

[0041] Explanation of main labels:

[0042] 100. Foldable screen; 110. Bendable area; 130. Non-bendable area; 150. Flexible circuit board; 20. Panel; 201. Light-emitting surface; 203. Back side; 21. Display body layer; 22. Adhesive layer; 23. Screen protective layer; 24. Polarizing film; 25. Pressure-sensitive adhesive layer; 26. Ultra-thin flexible film layer; 27. First polarizing layer; 28. CPI film; 29. ​​Second polarizing layer; 40. First liquid film layer; 50. Protective layer; 52. First adhesive reservoir; 521. Inner top surface; 523. 54. First inner surface; 60. First flange; 71. Second liquid film layer; 72. Support layer; 73. Second adhesive reservoir; 74. Inner bottom surface; 75. Second inner surface; 76. Second flange; 87. Sealant; 87. Sealing ring groove; 300. Electronic equipment; 310. Folding housing; 320. Folding device; 322. Rotating mechanism; 324. Central support plate; 326. Side support plate; 340. Frame; 341. Front; 343. Side; 344. Connecting groove; 345. Mounting groove. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Furthermore, the following descriptions of various embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments that can be implemented in this application. Directional terms used in this application, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] Please refer to the following: Figures 1 to 3In the first embodiment of the present invention, a foldable screen 100 covers the front of the folding housing of an electronic device. The foldable screen 100 includes a panel 20, a first liquid film layer 40, a protective layer 50, a second liquid film layer 60, and a support layer 70. The panel 20 includes a light-emitting surface 201 and a back surface 203 disposed opposite to each other. The first liquid film layer 40 is disposed on the light-emitting surface 201 of the panel 20. The protective layer 50 is stacked on the surface of the first liquid film layer 40 facing away from the panel 20. The first liquid film layer 40 is adsorbed onto the light-emitting surface 201 and the protective layer 50 of the panel 20 respectively. Specifically, the first liquid film layer 40 is coated on the light-emitting surface 201, and then the protective layer 50 is attached to the first liquid film layer 40 so that the first liquid film layer 40 is adsorbed onto both the panel 20 and the protective layer 50; or the first liquid film layer 40 is coated on the protective layer 50 facing the panel 20. The light-emitting surface 201 of panel 20 is then attached to the first liquid film layer 40, so that the first liquid film layer 40 is uniformly adsorbed onto panel 20 and protective layer 50; a second liquid film layer 60 is disposed on the back surface 203 of panel 20, and a support layer 70 is stacked on the surface of the second liquid film layer 60 away from panel 20, and the second liquid film layer 60 is uniformly adsorbed onto the back surface 203 of panel 20 and support layer 70 respectively; specifically, the second liquid film layer 60 is coated on the back surface 203, and then the support layer 70 is attached to the second liquid film layer 60, so that the second liquid film layer 60 is uniformly adsorbed onto panel 20 and support layer 70; or the second liquid film layer 60 is coated on the surface of support layer 70 facing panel 20, and then the back surface 203 of panel 20 is attached to the second liquid film layer 60, so that the second liquid film layer 60 is uniformly adsorbed onto panel 20 and support layer 70.

[0047] Both the first liquid film layer 40 and the second liquid film layer 60 are made of neutral grease with high light transmittance and resistance to high and low temperatures. The first liquid film layer 40 and the second liquid film layer 60 can be, but are not limited to, a polyurethane acrylate layer, an organosilicon resin layer, an acrylate prepolymer layer, a modified organosilicon oil layer, a fluorinated grease layer, or a synthetic ester neutral grease layer.

[0048] It is understood that the "front" refers to the side facing the same direction as the light-emitting surface of the foldable screen 100, and the "back" refers to the side facing away from the light-emitting surface of the foldable screen 100. The "interface adsorption" refers to the adsorption of substances at the interface between the protective layer 50 and the first liquid film layer 40, the interface between the panel 20 and the first liquid film layer 40, the interface between the support layer 70 and the second liquid film layer 60, and the interface between the panel 20 and the second liquid film layer 60. The foldable screen 100 can be, but is not limited to, flexible displays, flexible touch screens, flexible touch displays, and other flexible components with corresponding functions. The electronic device can be a mobile phone, tablet, or computer, etc. In the description of this embodiment, "connection" includes both direct and indirect connections. For example, the connection between A and B includes a direct connection between A and B or a connection through a third element C or more other elements. Connection also includes both integrated and non-integrated connections. An integrated connection means that A and B are formed and connected as a single unit, while a non-integrated connection means that A and B are not formed and connected as a single unit.

[0049] The foldable screen 100 of this application includes only a panel 20, a protective layer 50 stacked on the front side of the panel 20 by a first liquid film layer 40, and a support layer 70 stacked on the back side of the panel 20 by a second liquid film layer 60. This reduces the number of layers in the foldable screen 100. Furthermore, by using the first liquid film layer 40 and the second liquid film layer 60 to replace the traditional adhesive layer in the foldable screen of the prior art, the viscoelastic inherent characteristics of the traditional adhesive layer can cause bending redundancy, affecting the film layer recovery and causing creases. In contrast, the first liquid film layer 40 and the second liquid film layer 60 of this application... The thickness of the two liquid film layers 60 is less than that of the traditional adhesive layer. Specifically, the thickness of existing foldable screens is about 0.50 mm, while the thickness of the foldable screen 100 in this application is about 0.30 mm, thereby significantly reducing the overall thickness of the foldable screen 100. According to the principle of bending geometry, the reduction in the overall thickness of the foldable screen 100 significantly reduces the misalignment of each layer of the foldable screen 100, thereby achieving a low misalignment effect of the foldable screen 100, improving the creases of the foldable screen 100 and enhancing the screen bending reliability. Secondly, the traditional adhesive layer in the prior art has a slow recovery speed and some parts cannot be fully recovered, which causes bending redundancy in the existing foldable screen and affects the creases generated by the film layer recovery. However, the first liquid film layer 40 and the second liquid film layer 60 of the foldable screen 100 of this application have ultra-low modulus characteristics, which makes the foldable screen 100 ultra-thin, low-damping and low-misalignment characteristics. During the process of opening from the folded state to the flattened state, the first liquid film layer 40 and the second liquid film layer 60 can recover to their original state at an extremely fast speed, eliminating the redundancy of the traditional adhesive layer, achieving infinitely close to zero creases and improving the user experience.

[0050] Optionally, the thickness of the first liquid film layer 40 coated on the light-emitting surface 201 of the panel 20 or the surface of the protective layer 50 facing the panel 20 is much smaller than the thickness of the optical adhesive layer. Preferably, the thickness of the first liquid film layer 40 can be ultra-thin to negligible. The thickness of the second liquid film layer 60 coated on the back surface 203 of the panel 20 or the surface of the support layer 70 facing the panel 20 is much smaller than the thickness of the optical adhesive layer. Preferably, the thickness of the second liquid film layer 60 can be ultra-thin to negligible. Since the thicknesses of both the first liquid film layer 40 and the second liquid film layer 60 are much smaller than the thickness of the optical adhesive layer, the overall thickness of the folding screen 100 is reduced. Since the misalignment between the screen layers of the folding screen 100 is directly proportional to the layer thickness (i.e., the thicker the layer, the higher the misalignment, and the thinner the layer, the lower the misalignment), the folding screen 100 of this application exhibits reduced misalignment between the screen layers during the merging process and lower damping.

[0051] Optionally, the modulus of both the first liquid film layer 40 and the second liquid film layer 60 is less than or equal to 10 kPa. This significantly reduces the stacking misalignment and resistive layers of the foldable screen 100 during the process of folding, unfolding, and flattening. The film layers of the foldable screen 100 can quickly return to their initial state (i.e., flattened state). In other words, the first liquid film layer 40 and the second liquid film layer 60 can return to their original state at an extremely fast speed, without generating redundancy in traditional optical adhesive layers, thus achieving a crease-free appearance on the light-emitting surface of the foldable screen 100. Understandably, the modulus of the first liquid film layer 40 and the second liquid film layer 60 can be, but is not limited to, 10 kPa, 9 kPa, 9.5 kPa, 8 kPa, 8.6 kPa, 7 kPa, 6 kPa, and 5 kPa.

[0052] like Figure 4As shown, the panel 20 includes a display body layer 21, an adhesive layer 22, a screen protective layer 23, a polarizer 24, a pressure-sensitive adhesive layer 25, an ultra-thin flexible film layer 26, a first polarizing layer 27, a CPI film 28, and a second polarizing layer 29. The adhesive layer 22 is stacked on the light-emitting surface of the display body layer 21, the screen protective layer 23 is stacked on the surface of the adhesive layer 22 facing away from the display body layer 21, the polarizer 24 is stacked on the surface of the screen protective layer 23 facing away from the adhesive layer 22, a first liquid film layer 40 is coated on the surface of the polarizer 24 facing away from the screen protective layer 23, and a protective layer 50 is attached to the first liquid film layer 40. Pressure-sensitive adhesive layer 25 is stacked on the surface of the display body layer 21 away from the adhesive layer 22. Ultra-thin flexible film layer 26 is stacked on the surface of pressure-sensitive adhesive layer 25 away from the surface of the display body layer 21. First polarizing layer 27 is stacked on the surface of ultra-thin flexible film layer 26 away from the surface of pressure-sensitive adhesive layer 25. CPI film 28 is stacked on the surface of first polarizing layer 27 away from the surface of ultra-thin flexible film layer 26. Second polarizing layer 29 is stacked on the surface of CPI film 28 away from the surface of first polarizing layer 27. Second liquid film layer 60 is coated on the surface of second polarizing layer 29 away from CPI film 28. Support layer 70 is attached to second liquid film layer 60. In existing foldable screens, a polyimide layer is typically bonded to the protective layer on the surface away from the panel via an optical adhesive layer. A high-load-bearing ground layer is also stacked on the surface of the polyimide layer away from the optical adhesive layer, and a thermoplastic polyurethane elastic layer is stacked on the support layer on the surface away from the panel. However, the foldable screen 100 of this application has no other layers on the front of the protective layer 50 and no other layers on the back of the support layer 70, thus reducing the number of layers and the stack thickness. Since the misalignment between the layers of a foldable screen is directly proportional to the stack thickness—that is, the thicker the stack, the higher the misalignment, and the thinner the stack, the lower the misalignment—the reduced stack thickness of the foldable screen 100 specifically reduces the misalignment between the layers during the folding process.

[0053] Optionally, a first liquid film layer 40 is coated between the front side of the polarizer 24 and the back side of the protective layer 50. The first liquid film layer 40 utilizes its interfacial adsorption properties to ensure the fixation and movement limitation between the polarizer 24 and the protective layer 50. A second liquid film layer 60 is coated between the back side of the second polarizing layer 29 and the front side of the support layer 70. The second liquid film layer 60 utilizes its interfacial adsorption properties to ensure the fixation and movement limitation between the second liquid film layer 60 and the second polarizing layer 29.

[0054] In this embodiment, the protective layer 50 is an ultra-thin glass layer with a thickness ranging from 30µm to 150µm. It is understood that the thickness of the protective layer 50 can be, but is not limited to, 30µm, 35µm, 40µm, 43µm, 46µm, 50µm, 60µm, 65µm, 70µm, 75µm, 80µm, 90µm, 100µm, 110µm, 120µm, 135µm, 140µm, 145µm, and 150µm. Due to the inherent hardening coating process of the ultra-thin glass layer, the increased thickness and the effect of the hardening layer enable the protective layer 50 to protect the panel 20. Furthermore, the ultra-thin glass layer exhibits high light transmittance, high surface smoothness, high hardness, strong wear resistance, and good chemical stability. The support layer 70 is a stainless steel sheet with a thickness ranging from 0.01 mm to 0.10 mm. It can be understood that the thickness of the support layer 70 can be, but is not limited to, 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, and 0.10 mm. The support layer 70 covers the back of the panel 20 to ensure large-area support for the panel 20.

[0055] like Figure 1 and Figure 5 As shown, the foldable screen 100 includes a bendable area 110 and two non-bendable areas 130. The bendable area 110 is located between the two non-bendable areas 130. The foldable screen 100 can be folded or flattened through the bendable area 110. Specifically, the bendable area 110 is directly opposite the folding device of the folding shell, and the bendable area 110 of the foldable screen 100 can be folded or flattened with the folding device. The foldable screen 100 also includes a flexible circuit board 150. The flexible circuit board 150 connects various electronic components of the foldable screen 100, such as drive circuits or control circuits, to ensure stable signal transmission. Secondly, the flexible circuit board 150 provides a certain degree of support and protection for the foldable screen 100. The flexibility of the flexible circuit board 150 allows the foldable screen 100 to remain stable in various configurations and avoids circuit damage caused by deformation of the foldable screen 100. The end of the flexible circuit board 150 away from the foldable screen 100 is connected to the motherboard of the electronic device. The length direction of the bendable area 110 is parallel to the folding axis L of the foldable screen 100, and the width direction of the bendable area 110 is perpendicular to the folding axis L of the foldable screen 100.

[0056] like Figures 5-7As shown, when the foldable screen 100 is closed, the two non-bending areas 130 move closer together, and the foldable screen 100 bends along the bendable area 110 until the bendable area 110 bends into a teardrop shape, thus achieving the folding of the foldable screen 100. When the foldable screen 100 is unfolded, the two non-bending areas 130 move away from each other, and the foldable screen 100 unfolds along the bendable area 110 until the bendable area 110 is flattened, meaning that the two non-bending areas 130 and the bendable area 110 are on the same horizontal plane. Because the overall thickness of the foldable screen 100 is reduced, the misalignment of each layer during the folding or unfolding process is reduced, thus achieving a low misalignment effect. Secondly, both the first liquid film layer 40 and the second liquid film layer 60 have ultra-low modulus characteristics, which makes the foldable screen 100 ultra-thin and low-damping. During the process of opening from the folded state to the unfolded state, the first liquid film layer 40 and the second liquid film layer 60 can return to their original state at an extremely fast speed, eliminating the redundancy of traditional adhesive layers, achieving near-zero creases, and improving the user experience.

[0057] like Figures 8-9 As shown, the structure of the foldable screen 100a in the second embodiment of this application is similar to that of the foldable screen 100 in the first embodiment, except that the protective layer 50 and the support layer 70 in the second embodiment are made of the same material. Specifically, both the protective layer 50 and the support layer 70 in the second embodiment are ultra-thin glass layers. The protective layer 50 is laminated onto the light-emitting surface 201 of the panel 20 through a first liquid film layer 40, and the support layer 70 is laminated onto the back surface 203 of the panel 20 through a second liquid film layer 60. The thickness range of both the protective layer 50 and the support layer 70 is 30µm-150µm.

[0058] The beneficial effects of the foldable screen 100a in the second embodiment of this application are the same as those of the foldable screen 100 in the first embodiment, and will not be repeated here.

[0059] In other embodiments, the protective layer 50 is an ultra-thin glass layer, and the support layer 70 can also be, but is not limited to, a titanium alloy layer, a carbon fiber layer, etc. The titanium alloy layer has the effects of high strength, good elasticity, low density and light weight, and corrosion resistance; the carbon fiber layer has the effects of high strength, low density, corrosion resistance, and good fatigue resistance.

[0060] like Figures 10-11As shown, the structure of the foldable screen 100b in the third embodiment of this application is similar to that of the foldable screen in the first embodiment, except that the protective layer 50 of the foldable screen 100b in the third embodiment has an uneven thickness. Specifically, the thickness of the protective layer 50 facing the bendable area 110 is less than the thickness of the protective layer 50 facing the non-bendable area 130. In this embodiment, the surface of the protective layer 50 facing the panel 20 is provided with a first adhesive groove 52 facing the bendable area 110. A portion of the first liquid film layer 40 is filled in the first adhesive groove 52 to form a first protrusion 42 on the front side of the first liquid film layer 40. The length direction of the first adhesive groove 52 is parallel to the folding axis L of the foldable screen 100b, and the width direction of the first adhesive groove 52 is perpendicular to the folding axis L of the foldable screen 100b. Specifically, when the foldable screen 100b is in a flattened state, the width of the first adhesive groove 52 is greater than or equal to the width of the bendable area 110, and the length of the first adhesive groove 52 is less than or equal to the length of the bendable area 110; the depth of the first adhesive groove 52 gradually increases from the opposite sides towards the center. In this embodiment, the first adhesive groove 52 has an inner top surface 521 parallel to the protective layer 50 and first inner side surfaces 523 connected to the opposite sides of the inner top surface 521. The inner top surface 521 and the two first inner side surfaces 523 form the first adhesive groove 52; the first inner side surfaces 523 are inclined surfaces so that the first liquid film material in the first adhesive groove 52 can smoothly transition with the first liquid film material between the protective layer 50 and the panel 20, avoiding stress concentration during bending of the foldable screen. In this embodiment, the back of the protective layer 50 is provided with a first adhesive groove 52 facing the bendable area 110, and the first liquid film layer 40 is filled into the first adhesive groove 52, which further reduces the thickness of the foldable screen 100b at the bendable area 110 and improves the bendability of the foldable screen 100b.

[0061] In other embodiments, the first inner surface 523 may be an arc-shaped surface; the inner top surface 521 may also be an arc-shaped surface.

[0062] The beneficial effects of the foldable screen 100b in the third embodiment of this application are the same as those of the foldable screen 100 in the first embodiment, and will not be repeated here.

[0063] like Figures 12-13As shown, the structure of the foldable screen 100c in the fourth embodiment of this application is similar to that of the foldable screen in the first embodiment, except that the support layer 70 of the foldable screen 100c in the fourth embodiment has an uneven thickness. Specifically, the thickness of the support layer 70 facing the bendable area 110 is less than the thickness of the support layer 70 facing the non-bendable area 130. In this embodiment, the surface of the support layer 70 facing the panel 20 is provided with a second adhesive groove 72 facing the bendable area 110. A portion of the second liquid film layer 60 is filled in the second adhesive groove 72 to form a second protrusion 62 on the front side of the second liquid film layer 60. The length direction of the second adhesive groove 72 is parallel to the folding axis L of the foldable screen 100c, and the width direction of the second adhesive groove 72 is perpendicular to the folding axis L of the foldable screen 100c. Specifically, when the foldable screen 100c is in a flattened state, the second adhesive grooves 72 are all parallel to the folding axis L of the bendable area 110. The width of the second adhesive groove 72 is greater than or equal to the width of the bendable area 110, and the length of the second adhesive groove 72 is less than or equal to the length of the bendable area 110. The depth of the second adhesive groove 72 gradually increases from the opposite sides towards the center. In this embodiment, the second adhesive groove 72 has an inner bottom surface 721 parallel to the support layer 70 and two second inner side surfaces 723 connected to the opposite sides of the inner bottom surface 721. The inner bottom surface 721 and the two second inner side surfaces 723 form the second adhesive groove 72. The second inner side surfaces 723 are inclined surfaces so that the second liquid film material in the second adhesive groove 72 can smoothly transition with the second liquid film material between the support layer 70 and the panel 20, avoiding stress concentration during bending of the foldable screen. In this embodiment, the support layer 70 has a second adhesive groove 72 on the front side facing the bendable area 110, and the second liquid film layer 60 is filled into the second adhesive groove 72, which further reduces the thickness of the foldable screen 100c at the bendable area 110 and improves the bendability of the foldable screen 100c.

[0064] In other embodiments, the second inner surface 723 may be an arc-shaped surface, and the inner bottom surface 721 may be an arc-shaped surface.

[0065] The beneficial effects of the foldable screen 100c in the fourth embodiment of this application are the same as those of the foldable screen 100 in the first embodiment, and will not be repeated here.

[0066] like Figures 14-15As shown, the structure of the foldable screen 100d in the fifth embodiment of this application is similar to that of the foldable screen in the first embodiment, except that the protective layer 50 and the support layer 70 of the foldable screen 100d in the fifth embodiment are of different thicknesses. Specifically, the thickness of the protective layer 50 facing the bendable area 110 is less than the thickness of the protective layer 50 facing the non-bendable area 130, and the thickness of the support layer 70 facing the bendable area 110 is less than the thickness of the support layer 70 facing the non-bendable area 130. In this embodiment, the protective layer 50 has a first adhesive groove 52 facing the bendable area 110 on its surface facing the panel 20. A portion of the first liquid film layer 40 is filled in the first adhesive groove 52 to form a first protrusion 42 on the front side of the first liquid film layer 40. The support layer 70 has a second adhesive groove 72 facing the bendable area 110 on its surface facing the panel 20. A portion of the second liquid film layer 60 is filled in the second adhesive groove 72 to form a second protrusion 62 on the front side of the second liquid film layer 60. The length direction of the first adhesive groove 52 is parallel to the folding axis L of the folding screen 100d, and the width direction of the first adhesive groove 52 is perpendicular to the folding axis L of the folding screen 100d. The length direction of the second adhesive groove 72 is parallel to the folding axis L of the folding screen 100d, and the width direction of the second adhesive groove 72 is perpendicular to the folding axis L of the folding screen 100d. Specifically, when the foldable screen 100d is in a flattened state, the width of the first adhesive groove 52 is greater than or equal to the width of the bendable area 110, the length of the first adhesive groove 52 is less than or equal to the length of the bendable area 110, and the depth of the first adhesive groove 52 gradually increases from the opposite sides toward the center; the width of the second adhesive groove 72 is greater than or equal to the width of the bendable area 110, the length of the second adhesive groove 72 is less than or equal to the length of the bendable area 110, and the depth of the second adhesive groove 72 gradually increases from the opposite sides toward the center.

[0067] Specifically, the first adhesive reservoir 52 has an inner top surface 521 parallel to the protective layer 50 and two first inner side surfaces 523 connected to opposite sides of the inner top surface 521. The inner top surface 521 and the two first inner side surfaces 523 form the first adhesive reservoir 52; the first inner side surfaces 523 are inclined surfaces. The second adhesive reservoir 72 has an inner bottom surface 721 parallel to the support layer 70 and two second inner side surfaces 723 connected to opposite sides of the inner bottom surface 721. The inner bottom surface 721 and the two second inner side surfaces 723 form the second adhesive reservoir 72; the second inner side surfaces 723 are inclined surfaces. Since both the first inner side surfaces 523 and the second inner side surfaces 723 are inclined surfaces, the first liquid film material in the first adhesive reservoir 52 can smoothly transition with the first liquid film material between the protective layer 50 and the panel 20, and the second liquid film material in the second adhesive reservoir 72 can smoothly transition with the second liquid film material between the support layer 70 and the panel 20, thereby avoiding stress concentration during bending of the folding screen. In other embodiments, the first inner surface 523, the inner top surface 521, the second inner surface 723, and the inner bottom surface 721 can all be arc-shaped surfaces.

[0068] In this embodiment, the protective layer 50 has a first adhesive groove 52 on its back side facing the bendable area 110, and the first liquid film layer 40 is filled into the first adhesive groove 52; the support layer 70 has a second adhesive groove 72 on its front side facing the bendable area 110, and the second liquid film layer 60 is filled into the second adhesive groove 72, which further reduces the thickness of the foldable screen 100d at the bendable area 110 and further improves the bendability of the foldable screen 100d.

[0069] The beneficial effects of the folding screen 100d in the fifth embodiment of this application are the same as those of the folding screen in the first embodiment, and will not be repeated here.

[0070] like Figures 16-18 As shown, the structure of the folding screen 100e in the sixth embodiment of this application is similar to that of the folding screen in the first embodiment, except that: the outer peripheral surface of the folding screen 100e in the sixth embodiment is provided with sealant 80, which is sealed to the outer peripheral surface of the folding screen 100e to prevent the first liquid film layer 40 and the second liquid film layer 60 from being squeezed out during the folding or flattening process of the folding screen 100e. Specifically, the outer peripheral edge of the protective layer 50 protrudes relative to the panel 20 to form a first flange 54, and the outer peripheral edge of the support layer 70 protrudes relative to the panel 20 to form a second flange 74. A sealing ring groove 81 is formed between the first flange 54 and the second flange 74, and the sealing ring groove 81 is filled with sealant 80. The sealant 80 around the folding screen 100e can produce a sealing effect to prevent the first liquid film layer 40 and the second liquid film layer 60 from being squeezed out during the folding or flattening process of the folding screen 100e. Optionally, the room temperature modulus of the sealant 80 is less than 50 kPa.

[0071] In this embodiment, the first flange 54 is parallel to the second flange 74, and the length of the first flange 54 protruding relative to the panel 20 is equal to the length of the second flange 74 protruding relative to the panel 20. The length of the first flange 54 protruding relative to the panel 20 is 0.20 mm to 1.0 mm. It can be understood that the length of the first flange 54 protruding relative to the panel 20 can be, but is not limited to, 0.2 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, or 0.65 mm. The second flange 74 protrudes from the panel 20 by a length of 0.20 mm to 1.0 mm, and the length of the second flange 74 protruding from the panel 20 can be, but is not limited to, 0.2 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.8 mm, 0.86 mm, 0.9 mm, or 1.0 mm. The depth of the sealing ring groove 81 is in the range of 0.20 mm to 1.0 mm, so that the sealant 80 can be stably positioned in the sealing ring groove 81 to prevent the first liquid film layer 40 and the second liquid film layer 60 from being squeezed out. Understandably, the depth of the sealing ring groove 81 can be, but is not limited to, 0.2 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.8 mm, 0.86 mm, 0.9 mm, or 1.0 mm. In other embodiments, the length by which the first flange 54 protrudes relative to the panel 20 may not be equal to the length by which the second flange 74 protrudes relative to the panel 20.

[0072] The beneficial effects of the foldable screen 100e in the fifth embodiment of this application are the same as those of the foldable screen in the first embodiment, and will not be repeated here.

[0073] like Figures 19-20 As shown, the structure of the foldable screen 100f in the seventh embodiment of this application is similar to that of the foldable screen in the sixth embodiment, except that the protective layer 50 and the support layer 70 in the seventh embodiment are made of the same material. Specifically, both the protective layer 50 and the support layer 70 in the seventh embodiment are ultra-thin glass layers. The protective layer 50 is laminated onto the light-emitting surface 201 of the panel 20 through a first liquid film layer 40, and the support layer 70 is laminated onto the back surface 203 of the panel 20 through a second liquid film layer 60. The thickness range of both the protective layer 50 and the support layer 70 is 30µm-150µm.

[0074] The beneficial effects of the folding screen 100f in the seventh embodiment of this application are the same as those of the folding screen in the sixth embodiment, and will not be repeated here.

[0075] like Figures 21-22As shown, the structure of the folding screen 100g in the eighth embodiment of this application is similar to that in the sixth embodiment, except that the protective layer 50 of the folding screen 100g in the eighth embodiment has an uneven thickness. Specifically, the thickness of the protective layer 50 facing the bendable area 110 is less than the thickness of the protective layer 50 facing the non-bendable area 130. In this embodiment, the surface of the protective layer 50 facing the panel 20 is provided with a first adhesive groove 52 facing the bendable area 110. A portion of the first liquid film layer 40 is filled in the first adhesive groove 52 to form a first protrusion 42 on the front side of the first liquid film layer 40. The length direction of the first adhesive groove 52 is parallel to the folding axis L of the folding screen 100g, and the width direction of the first adhesive groove 52 is perpendicular to the folding axis L of the folding screen 100g. Specifically, when the foldable screen 100g is in a flattened state, the width of the first adhesive groove 52 is equal to the width of the bendable area 110, and the length of the first adhesive groove 52 is less than the length of the bendable area 110; the depth of the first adhesive groove 52 gradually increases from the opposite sides towards the center. In this embodiment, the first adhesive groove 52 has an inner top surface 521 parallel to the protective layer 50 and first inner side surfaces 523 connected to the opposite sides of the inner top surface 521. The inner top surface 521 and the two first inner side surfaces 523 form the first adhesive groove 52; the first inner side surfaces 523 are inclined surfaces so that the first liquid film material in the first adhesive groove 52 can smoothly transition with the first liquid film material between the protective layer 50 and the panel 20, avoiding stress concentration when the foldable screen 100g is bent. In this embodiment, the back of the protective layer 50 is provided with a first adhesive groove 52 facing the bendable area 110, and the first liquid film layer 40 is filled into the first adhesive groove 52, which further reduces the thickness of the foldable screen 100g at the bendable area 110 and improves the bendability of the foldable screen 100g.

[0076] In other embodiments, the first inner surface 523 is an arc-shaped surface, and the inner top surface 521 is an arc-shaped surface.

[0077] The beneficial effects of the folding screen 100g in the eighth embodiment of this application are the same as those of the folding screen in the sixth embodiment, and will not be repeated here.

[0078] like Figures 23-24As shown, the structure of the foldable screen 100j in the ninth embodiment of this application is similar to that of the foldable screen in the sixth embodiment, except that the support layer 70 of the foldable screen 100j in the ninth embodiment has an uneven thickness. Specifically, the thickness of the support layer 70 facing the bendable area 110 is less than the thickness of the support layer 70 facing the non-bendable area 130. In this embodiment, the surface of the support layer 70 facing the panel 20 is provided with a second adhesive groove 72 facing the bendable area 110. A portion of the second liquid film layer 60 is filled in the second adhesive groove 72 to form a second protrusion 62 on the front side of the second liquid film layer 60. The length direction of the second adhesive groove 72 is parallel to the folding axis L of the foldable screen 100j, and the width direction of the second adhesive groove 72 is perpendicular to the folding axis L of the foldable screen 100j. Specifically, when the foldable screen 100j is in a flattened state, the width of the second adhesive groove 72 is greater than or equal to the width of the bendable area 110, and the length of the second adhesive groove 72 is less than the length of the bendable area 110; the depth of the second adhesive groove 72 gradually increases from the opposite sides towards the center. In this embodiment, the second adhesive groove 72 has an inner bottom surface 721 parallel to the support layer 70 and two second inner side surfaces 723 connected to the opposite sides of the inner bottom surface 721. The inner bottom surface 721 and the two second inner side surfaces 723 form the second adhesive groove 72. Specifically, the second inner side surface 723 is an inclined surface so that the second liquid film material in the second adhesive groove 72 can smoothly transition with the second liquid film material between the support layer 70 and the panel 20, avoiding stress concentration during bending of the foldable screen 100j. Since the support layer 70 in this embodiment has a second adhesive groove 72 facing the bendable area 110, and the second liquid film layer 60 is filled into the second adhesive groove 72, the thickness of the foldable screen 100j at the bendable area 110 can be further reduced, and the bendability of the foldable screen 100j can be improved.

[0079] In other embodiments, the second inner surface 723 may be an arc-shaped surface, and the inner bottom surface 721 may be an arc-shaped surface.

[0080] The beneficial effects of the folding screen 100j in the ninth embodiment of this application are the same as those of the folding screen in the sixth embodiment, and will not be repeated here.

[0081] like Figures 25-26As shown, the structure of the foldable screen 100m in the tenth embodiment of this application is similar to that of the foldable screen in the sixth embodiment, except that the protective layer 50 and the support layer 70 of the foldable screen 100m in the tenth embodiment are of different thicknesses. Specifically, the thickness of the protective layer 50 facing the bendable area 110 is less than the thickness of the protective layer 50 facing the non-bendable area 130, and the thickness of the support layer 70 facing the bendable area 110 is less than the thickness of the support layer 70 facing the non-bendable area 130. In this embodiment, the protective layer 50 has a first adhesive groove 52 facing the bendable area 110 on its surface facing the panel 20. A portion of the first liquid film layer 40 is filled in the first adhesive groove 52 to form a first protrusion 42 on the front side of the first liquid film layer 40. The support layer 70 has a second adhesive groove 72 facing the bendable area 110 on its surface facing the panel 20. A portion of the second liquid film layer 60 is filled in the second adhesive groove 72 to form a second protrusion 62 on the front side of the second liquid film layer 60. The length direction of the first adhesive groove 52 is parallel to the folding axis L of the folding screen 100m, and the width direction of the first adhesive groove 52 is perpendicular to the folding axis L of the folding screen 100m. The length direction of the second adhesive groove 72 is parallel to the folding axis L of the folding screen 100m, and the width direction of the second adhesive groove 72 is perpendicular to the folding axis L of the folding screen 100m. Specifically, when the foldable screen 100m is in a flattened state, the width of the first adhesive groove 52 is greater than or equal to the width of the bendable area 110, the length of the first adhesive groove 52 is less than the length of the bendable area 110, and the depth of the first adhesive groove 52 gradually increases from the opposite sides towards the center; the width of the second adhesive groove 72 is greater than or equal to the width of the bendable area 110, the length of the second adhesive groove 72 is less than the length of the bendable area 110, and the depth of the second adhesive groove 72 gradually increases from the opposite sides towards the center.

[0082] Specifically, the first adhesive receiving tank 52 has an inner top surface 521 parallel to the protective layer 50 and two first inner side surfaces 523 connected to opposite sides of the inner top surface 521. The inner top surface 521 and the two first inner side surfaces 523 form the first adhesive receiving tank 52; in this embodiment, the first inner side surface 523 is an inclined surface. The second adhesive receiving tank 72 has an inner bottom surface 721 parallel to the support layer 70 and two second inner side surfaces 723 connected to opposite sides of the inner bottom surface 721. The inner bottom surface 721 and the two second inner side surfaces 723 form the second adhesive receiving tank 72; in this embodiment, the second inner side surface 723 is an inclined surface. Since both the first inner side surface 523 and the second inner side surface 723 are inclined surfaces, the first liquid film material in the first adhesive receiving tank 52 can smoothly transition with the first liquid film material between the protective layer 50 and the panel 20, and the second liquid film material in the second adhesive receiving tank 72 can smoothly transition with the second liquid film material between the support layer 70 and the panel 20, thereby avoiding stress concentration during bending of the folding screen.

[0083] In other embodiments, the first inner surface 523, the inner top surface 521, the second inner surface 723, and the inner bottom surface 721 can all be arc-shaped surfaces.

[0084] In this embodiment, the protective layer 50 has a first adhesive groove 52 on its back side facing the bendable area 110, and the first liquid film layer 40 is filled into the first adhesive groove 52; the support layer 70 has a second adhesive groove 72 on its front side facing the bendable area 110, and the second liquid film layer 60 is filled into the second adhesive groove 72, which further reduces the thickness of the foldable screen 100m at the bendable area 110 and improves the bendability of the foldable screen 100m.

[0085] The beneficial effects of the folding screen 100m in the tenth embodiment of this application are the same as those of the folding screen in the sixth embodiment, and will not be repeated here.

[0086] like Figures 27-30 As shown, the electronic device 300 in one embodiment of this application includes a foldable screen 100 and a folding housing 310 as described in any of the above embodiments. The back of the foldable screen 100 is disposed on the front of the folding housing 310. The foldable screen 100 includes a bendable area 110 and two non-bendable areas 130. The bendable area 110 is located between the two non-bendable areas 130. The folding housing 310 includes a folding device 320 and two frames 340. The two frames 340 are respectively connected to opposite sides of the folding device 320. The foldable screen 100 covers the front of the folding housing 310. The two non-bendable areas 130 are respectively connected to the two frames 340. The bendable area 110 faces the front of the folding device 320. The bendable area 110 of the foldable screen 100 can be bent or flattened with the folding device 320.

[0087] The folding device 320 includes a rotating mechanism 322, two central support plates 324, and two side support plates 326. The two central support plates 324 and the two side support plates 326 are disposed on the front of the rotating mechanism 322. The two central support plates 324 are rotatably connected to each other, and the two side support plates 326 are respectively located on opposite sides of the two central support plates 324. The two side support plates 326 and the two central support plates 324 can be combined into a teardrop-shaped space through the rotating mechanism 322. The bendable area 110 of the foldable screen 100 is accommodated in the teardrop-shaped space. The two side support plates 326 and the two central support plates 324 can be flattened to a horizontal state through the rotating mechanism 322. The bendable area 110 of the foldable screen 100 is flattened and covers the two central support plates 324 and the two side support plates 326.

[0088] The frame 340 includes a front side 341 and two opposite sides 343. The front side of the frame 340 is provided with a connecting groove 344. The front side 341 of the frame 340 is provided with a mounting groove 345 on the side near the folding device 320. The mounting groove 345 passes through the side 343 facing the folding device 320 and connects to the connecting groove 344. When assembling the electronic device 300, the folding device 320 is placed between two frames 340, so that the opposite sides of the rotating mechanism 322 are respectively positioned in the mounting slots 345 of the two frames 340. When the folded housing 310 is in a flattened state, the front surfaces of the two central support plates 324, the front surfaces of the two side support plates 326, and the inner surfaces of the connecting slots 344 of the two frames 340 are coplanar. The two non-bending areas 130 of the folding screen 100 are respectively accommodated in the connecting slots 344 of the two frames 340, and the two non-bending areas 130 are respectively connected to the two frames 340. The bendable area 110 is attached to the two central support plates 324 and the two side support plates 326. Specifically, each non-bending area 130 is connected to the corresponding frame 340 by an adhesive, and the two central support plates 324 and the two side support plates 326 are respectively connected to the bendable area 110 by an adhesive. The adhesive can be, but is not limited to, glue or double-sided tape. In other embodiments, no adhesive bonding is required between the two central support plates 324 and the bendable area 110, and / or no adhesive bonding is required between the two side support plates 326 and the bendable area 110.

[0089] like Figure 31 and Figure 32 As shown, when merging the electronic device 300, a bending force is applied to at least one of the two frames 340 of the electronic device 300, causing the two frames 340 connected to each other to rotate towards each other via the rotating mechanism 322; the two side support plates 326 fold together with the rotating mechanism 322, and the two middle support plates 324 fold together with the rotating mechanism 322, until the front of the two middle support plates 324 and the front of the two side support plates 326 form a teardrop shape in cross section; the bendable area 110 of the foldable screen 100 bends with the folding device 320 until the bendable area 110 bends into a teardrop shape, thereby realizing the merging of the electronic device 300. When the electronic device 300 is flattened, a flattening force is applied to at least one of the two frames 340 of the electronic device 300, so that the two frames 340 connected to each other are flattened by rotating through the rotating mechanism 322; the two side support plates 326 unfold with each other along with the rotating mechanism 322, and the two middle support plates 324 unfold with each other along with the rotating mechanism 322, until the front surfaces of the two middle support plates 324 and the front surfaces of the two side support plates 326 are coplanar; the bendable area 110 of the foldable screen 100 is flattened with the folding device 320 until the bendable area 110 is completely flattened, thereby realizing the flattening of the electronic device 300.

[0090] In this application, the protective layer 50 of the foldable screen 100 of the electronic device 300 is connected to the panel 20 via a first liquid film layer 40, and the support layer 70 is connected to the panel 20 via a second liquid film layer 60. Since both the first liquid film layer 40 and the second liquid film layer 60 have low modulus and good interface adsorption function, and the thickness of the first liquid film layer 40 and the second liquid film layer 60 is relatively thin, the first liquid film layer 40 and the second liquid film layer 60 replace the traditional adhesive layer in the existing foldable screen, thereby reducing the thickness of the foldable screen 100 and reducing the misalignment of each layer of the foldable screen 100. This results in the foldable screen 100 having a low misalignment effect during the process of opening from the folded shell 310 to the flattened state, allowing the foldable screen 100 to return to its original state at a very fast speed. This eliminates the redundancy of the traditional adhesive layer and improves the bending reliability of the foldable screen 100.

[0091] The above are the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A foldable screen, characterized in that, The foldable screen includes: A panel, the panel comprising a light-emitting surface and a back surface disposed opposite to each other; A first liquid film layer is disposed on the light-emitting surface of the panel; A protective layer is stacked on the surface of the first liquid film layer away from the panel, and the first liquid film layer is adsorbed onto the panel and the protective layer at the interface respectively; A second liquid film layer is disposed on the back side of the panel; and A support layer is stacked on the surface of the second liquid film layer away from the panel, and the second liquid film layer is adsorbed onto the panel and the support layer at their respective interfaces.

2. The foldable screen according to claim 1, characterized in that, The modulus of both the first liquid film layer and the second liquid film layer is less than or equal to 10 kPa.

3. The foldable screen according to claim 1, characterized in that, The protective layer is an ultra-thin glass layer, and the supporting layer is a stainless steel layer, a titanium alloy layer, a carbon fiber layer, or an ultra-thin glass layer.

4. The foldable screen according to any one of claims 1-3, characterized in that, The foldable screen includes a bendable area, through which the foldable screen can be folded or flattened; the protective layer has a first adhesive groove facing the bendable area on its surface facing the panel, and a first liquid film layer fills the first adhesive groove; and / or the support layer has a second cavity groove facing the bendable area on its surface facing the panel, and a second liquid film layer fills the second adhesive groove.

5. The foldable screen according to any one of claims 1-3, characterized in that, The outer periphery of the protective layer protrudes relative to the panel to form a first flange, and the outer periphery of the support layer protrudes relative to the panel to form a second flange. A sealing ring groove is formed between the first flange and the second flange, and the sealing ring groove is filled with sealant.

6. The foldable screen according to claim 5, characterized in that, The first flange protrudes from the panel by a length of 0.20 mm to 1.0 mm, and the second flange protrudes from the panel by a length of 0.20 mm to 1.0 mm.

7. The foldable screen according to claim 5, characterized in that, The foldable screen includes a bendable area, through which the foldable screen can be folded or flattened; the protective layer has a first adhesive groove on the surface facing the panel, which is directly opposite the bendable area, and the first liquid film layer is filled in the first adhesive groove.

8. The foldable screen according to claim 7, characterized in that, The first adhesive container has an inner top surface and two first inner side surfaces located on opposite sides of the inner top surface. The inner top surface and the two first inner side surfaces form the first adhesive container. The first inner side surfaces are inclined surfaces or arc-shaped surfaces.

9. The foldable screen according to claim 5, characterized in that, The foldable screen includes a bendable area, through which the foldable screen can be folded or flattened; the surface of the support layer facing the panel is provided with a second adhesive groove directly opposite the bendable area, and the second liquid film layer is filled in the second adhesive groove.

10. The foldable screen according to claim 9, characterized in that, The second adhesive container has an inner bottom surface and two second inner side surfaces located on opposite sides of the inner bottom surface. The second inner surface and the two second side surfaces form the second adhesive container. The second inner side surfaces are inclined surfaces or arc-shaped surfaces.

11. The foldable screen according to claim 5, characterized in that, The foldable screen includes a bendable area, through which the foldable screen can be folded or flattened; the protective layer has a first adhesive groove facing the bendable area on its surface facing the panel, and a first liquid film layer fills the first adhesive groove; the support layer has a second adhesive groove facing the bendable area on its surface facing the panel, and a second liquid film layer fills the second adhesive groove.

12. The foldable screen according to claim 11, characterized in that, The first adhesive container has an inner top surface and two first inner side surfaces located on opposite sides of the inner top surface. The inner top surface and the two first side surfaces form the first adhesive container. The first inner side surfaces are inclined or arc-shaped surfaces. The second adhesive container has an inner bottom surface and two second inner side surfaces located on opposite sides of the inner bottom surface. The inner bottom surface and the two second side surfaces form the second adhesive container. The second inner side surfaces are inclined or arc-shaped surfaces.

13. An electronic device, characterized in that, The electronic device includes a foldable screen and a folding housing as described in any one of claims 1-12. The foldable screen includes a bendable area and two non-bendable areas, the bendable area being located between the two non-bendable areas. The folding housing includes a folding device and two frames, the two frames being respectively connected to opposite sides of the folding device. The foldable screen covers the front of the folding housing. The two non-bendable areas are respectively connected to the two frames. The bendable area faces the folding device.

Images