Foldable display screen and foldable electronic device

Abstract

A foldable display screen (100) and a foldable electronic device (1000). The foldable display screen (100) comprises a display light-emitting layer (10), a light-transmitting cover plate layer (20) and a first support layer (30), wherein the display light-emitting layer (10) comprises at least one non-bending display region (101) and at least one bending display region (102), the non-bending display region (101) being arranged adjacent to the bending display region (102); the light-transmitting cover plate layer (20) is arranged on a display side of the display light-emitting layer (10) and covers the non-bending display region (101) and the bending display region (102); the first support layer (30) is arranged on the side of the display light-emitting layer (10) facing away from the light-transmitting cover plate layer (20) and covers the non-bending display region (101) and the bending display region (102); and the first support layer (30) comprises at least one non-bending support portion (301) and at least one bending support portion (302), the non-bending support portion (301) being supported on the side of the non-bending display region (101) facing away from the light-transmitting cover plate layer (20), the bending support portion (302) being supported on the side of the bending display region (102) facing away from the light-transmitting cover plate layer (20), and the thickness of the bending support portion (302) being less than the thickness of the non-bending support portion (301). The foldable display screen (100) and the foldable electronic device (1000) can enhance the protective effect and reduce creases.

Description

Foldable displays and foldable electronic devices

[0001] This application claims priority to Chinese Patent Application No. 2024119189432, filed on December 24, 2024, entitled "Foldable Display Screen and Foldable Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic technology, specifically to a foldable display screen and a foldable electronic device. Background Technology

[0003] Foldable displays offer advantages such as larger screen size and greater portability. In related technologies, to achieve foldability, the metal support plate of the display needs to be perforated. However, this perforation design increases the risk of damage to the display's light-emitting layer and can also cause stress concentration in the corresponding perforation areas of the film and adhesive materials, thus deepening the creases on the display. Summary of the Invention

[0004] This application provides a foldable display screen and a foldable electronic device that can enhance protection and reduce creases.

[0005] On one hand, this application provides a foldable display screen, including:

[0006] The display light-emitting layer includes at least one non-bending display area and at least one bending display area, wherein the non-bending display area and the bending display area are disposed adjacent to each other;

[0007] A light-transmitting cover layer is disposed on the display side of the display light-emitting layer, and covers the non-bent display area and the bent display area; and

[0008] A first support layer is disposed on the side of the display light-emitting layer opposite to the light-transmitting cover layer, and covers the non-bending display area and the bending display area. The first support layer includes at least one non-bending support portion and at least one bending support portion. The non-bending support portion supports the side of the non-bending display area opposite to the light-transmitting cover layer, and the bending support portion supports the side of the bending display area opposite to the light-transmitting cover layer. The thickness of the bending support portion is less than the thickness of the non-bending support portion.

[0009] On the other hand, this application also provides a foldable electronic device, including a foldable housing assembly and the foldable display screen, wherein the foldable housing assembly is connected to the foldable display screen. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0011] Figure 1 shows the strain curves of polymer films or adhesives;

[0012] Figure 2 is a partial cross-sectional schematic diagram of the foldable display screen provided in an embodiment of this application;

[0013] Figure 3 is a front view of one of the display light-emitting layers in the foldable display screen shown in Figure 2.

[0014] Figure 4 is a schematic diagram of another front structure of the display light-emitting layer in the foldable display screen shown in Figure 2;

[0015] Figure 5 is a front view of one of the front structures of the first support layer in the foldable display screen shown in Figure 2;

[0016] Figure 6 is a schematic diagram of another front structure of the first support layer in the foldable display shown in Figure 2;

[0017] Figure 7 is a partial cross-sectional schematic diagram of the first support layer of the foldable display screen shown in Figure 2, which also includes a transition support portion.

[0018] Figure 8 is a partial cross-sectional schematic diagram of the foldable display screen shown in Figure 2, which also includes a second support layer;

[0019] Figure 9 is a partial cross-sectional schematic diagram of the light-transmitting cover layer of the foldable display screen shown in Figure 2, including the non-bending cover portion and the bending cover portion.

[0020] Figure 10 is a front structural schematic diagram of the light-transmitting cover layer in the foldable display screen shown in Figure 9;

[0021] Figure 11 is a schematic diagram of another front structure of the light-transmitting cover layer in the foldable display screen shown in Figure 9;

[0022] Figure 12 is a partial cross-sectional schematic diagram of the light-transmitting cover layer in the foldable display screen shown in Figure 9, which also includes a transition cover plate.

[0023] Figure 13 is a partial cross-sectional schematic diagram of the foldable display screen shown in Figure 8, which also includes a first coating and a second coating;

[0024] Figure 14 is a partial cross-sectional schematic diagram of the foldable display screen shown in Figure 13, which also includes a third coating;

[0025] Figure 15 is a partial cross-sectional schematic diagram of the foldable display screen shown in Figure 14, which also includes a conductive layer.

[0026] Figure 16 is a schematic diagram of a foldable electronic device provided in an embodiment of this application after folding;

[0027] Figure 17 is a schematic diagram of another structure of the foldable electronic device provided in the embodiment of this application after folding;

[0028] Figure 18 is a schematic diagram of another structure of the foldable electronic device provided in the embodiment of this application after folding.

[0029] Explanation of reference numerals in the attached drawings: Foldable display screen 100; Display light-emitting layer 10; Light-transmitting cover layer 20; First support layer 30; Non-bending display area 101; Bending display area 102; First non-bending display area 110; Second non-bending display area 112; Third non-bending display area 113; First bending display area 121; Fourth non-bending display area 114; Second bending display area 122; Fifth non-bending display area 115; First adhesive layer 41; Non-bending support part 301; Bending support part 302; First non-bending support part 310; Second non-bending support part 312; Third non-bending support part 313; First bending support part 321; Fourth non-bending support part 314; Second bending support part 322; Fifth non-bending support part 315; Second adhesive layer 42; Transition support part 303; Second support Layer 60; Third adhesive layer 43; Fourth adhesive layer 44; Non-bending cover plate 201; Bending cover plate 202; First non-bending cover plate 210; Second non-bending cover plate 212; Third non-bending cover plate 213; First bending cover plate 220; Fourth non-bending cover plate 214; Second bending cover plate 221; Fifth non-bending cover plate 215; Transition cover plate 203; First coating 51; Second coating 52; Foldable electronic device 1000; First housing assembly 21; Second housing assembly 22; First non-bending display body 11; Second non-bending display body 12; Bending display body 13; Third non-bending display body 14; Fourth non-bending display body 15; Fifth non-bending display body 16; First bending display body 17; Second bending display body 18. Detailed Implementation

[0030] Foldable screens have a layered structure, consisting of multiple layers of polymer films and adhesives. Due to the low elastic modulus of these polymer films and adhesives, they are easily deformed, offering limited protection for the foldable screen's light-emitting panel. This often results in damage to the internal circuitry or cracking of the coating when the foldable screen is subjected to external force, manifesting as colored dots, bright lines, or black spots on the screen. Furthermore, because of the viscous flow properties of the polymer films and adhesives, folding causes viscous flow deformation, resulting in irreversible creases after repeated folding.

[0031] Figure 1 shows the strain curve of the polymer film or adhesive. The horizontal axis represents the time the polymer film or adhesive is subjected to external force, and the vertical axis represents the magnitude of the strain. As can be seen from Figure 1, at time t1, the polymer film or adhesive is subjected to external force. From t1 to t2, the strain of the polymer film or adhesive increases rapidly with the increase of the time the external force is applied. At time t2, the external force disappears, and the strain of the polymer film or adhesive begins to recover, but ultimately, the viscous flow deformation of ε3 remains unrecovered. The specific principle can be explained as follows: at times t1 to t2, the polymer chains of the polymer film or adhesive undergo elastic deformation ε1, high elastic deformation ε2, and viscous flow deformation ε3 in sequence. Elastic deformation is the elastic deformation caused by the immediate change in bond length and bond angle inside the polymer chain after being subjected to force, and it can recover quickly after the force is released. High elastic deformation is the elastic deformation caused by the relaxation of polymer chain segments and the extension along the direction of external force, and the chain segments rebound after the force is released and can recover slowly. Viscous flow deformation is the viscous flow caused by the polymer chains overcoming interactions and entanglements and undergoing relative slippage, and it cannot recover after the force is released.

[0032] In addition, foldable screens contain support plates with openings. These openings can cause localized differences in the rigidity of the support plate, making the film or adhesive material at the corresponding locations more prone to stress concentration and micro-deformation, which manifests as film marks on the foldable screen.

[0033] In summary, current foldable screens suffer from poor protection of the light-emitting panel, noticeable creases due to lamination creep, and film imprinting caused by openings in the support plate. To address these issues, this application provides a foldable display screen and a foldable electronic device.

[0034] This application provides a foldable display screen, including a display light-emitting layer, a light-transmitting cover layer, and a first support layer. The display light-emitting layer includes at least one non-bending display area and at least one bending display area, which are disposed adjacent to each other. The light-transmitting cover layer is disposed on the display side of the display light-emitting layer and covers the non-bending display area and the bending display area. The first support layer is disposed on the side of the display light-emitting layer away from the light-transmitting cover layer and covers the non-bending display area and the bending display area. The first support layer includes at least one non-bending support portion and at least one bending support portion. The non-bending support portion supports the non-bending display area on the side away from the light-transmitting cover layer, and the bending support portion supports the bending display area on the side away from the light-transmitting cover layer. The thickness of the bending support portion is less than the thickness of the non-bending support portion.

[0035] The thickness of the non-bending support portion ranges from 100µm to 180µm, while the thickness of the bending support portion ranges from 30µm to 80µm.

[0036] The first notch is formed on the side of the bent support that is away from the display light-emitting layer.

[0037] The thickness of the non-bending support part is uniform, and the thickness of the bending support part is uniform.

[0038] The first support layer also includes a transition support portion, which is located between the non-bending support portion and the bending support portion. The thickness of the transition support portion gradually decreases in the direction from the non-bending support portion to the bending support portion.

[0039] The foldable display screen also includes a first adhesive layer, which is disposed between the light-transmitting cover layer and the display light-emitting layer to connect the light-transmitting cover layer and the display light-emitting layer.

[0040] The foldable display screen also includes a second adhesive layer, which is disposed between the first support layer and the display light-emitting layer to connect the first support layer and the display light-emitting layer.

[0041] The foldable display screen also includes a second support layer. The display light-emitting layer, the second support layer and the first support layer are stacked in sequence. The material of the second support layer is glass. The thickness of the second support layer is uniform and ranges from 30um to 50um.

[0042] The foldable display screen also includes a third adhesive layer and a fourth adhesive layer. The third adhesive layer is located between the second support layer and the display light-emitting layer to connect the second support layer and the display light-emitting layer. The fourth adhesive layer is located between the second support layer and the first support layer to connect the second support layer and the first support layer.

[0043] The non-bending display area includes a first non-bending display area and a second non-bending display area, with the first non-bending display area, the bending display area, and the second non-bending display area being sequentially adjacent to each other. The non-bending support part includes a first non-bending support part and a second non-bending support part, with the first non-bending support part, the bending support part, and the second non-bending support part being sequentially adjacent to each other.

[0044] Among them, at least one non-bending display area includes a third non-bending display area, a fourth non-bending display area, and a fifth non-bending display area; at least one bending display area includes a first bending display area and a second bending display area; the third non-bending display area, the first bending display area, the fourth non-bending display area, the second bending display area, and the fifth non-bending display area are sequentially adjacent to each other; at least one non-bending support part includes a third non-bending support part, a fourth non-bending support part, and a fifth non-bending support part; at least one bending support part includes a first bending support part and a second bending support part; the third non-bending support part, the first bending support part, the fourth non-bending support part, the second bending support part, and the fifth non-bending support part are sequentially adjacent to each other.

[0045] The light-transmitting cover layer is made of glass, and its thickness is uniform, ranging from 40µm to 60µm.

[0046] The light-transmitting cover layer includes at least one non-bending cover portion and at least one bending cover portion. The non-bending cover portion covers the non-bending display area, and the bending cover portion covers the bending display area. The thickness of the bending cover portion is less than the thickness of the non-bending cover portion.

[0047] The thickness of the non-bending cover plate ranges from 70µm to 200µm, while the thickness of the bending cover plate ranges from 30µm to 60µm.

[0048] Among them, a second notch is formed on the side of the bent cover plate that is away from the display light-emitting layer.

[0049] The thickness of the non-bent cover plate is uniform, and the thickness of the bent cover plate is uniform.

[0050] The light-transmitting cover layer also includes a transition cover portion, which is located between the non-bent cover portion and the bent cover portion. The thickness of the transition cover portion gradually decreases in the direction from the non-bent cover portion to the bent cover portion.

[0051] The foldable display screen further includes a first coating and a second coating. The second coating is attached to the surface of the light-transmitting cover layer away from the display light-emitting layer, and the first coating is attached to the surface of the second coating away from the light-transmitting cover layer. The hardness of the first coating is greater than that of the second coating. And / or, the foldable display screen further includes a third coating, which is attached to the surface of the first support layer away from the display light-emitting layer.

[0052] The foldable display also includes a conductive layer, which is attached to the surface of the third coating that faces away from the display light-emitting layer.

[0053] This application also provides a foldable electronic device, including a foldable housing assembly and a foldable display screen, wherein the foldable housing assembly is connected to the foldable display screen.

[0054] The technical solutions provided in this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort are within the protection scope of this application.

[0055] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0056] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device that includes one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0057] As shown in Figure 2, which is a partial cross-sectional schematic diagram of the foldable display screen 100 provided in an embodiment of this application, the foldable display screen 100 includes a display light-emitting layer 10, a light-transmitting cover layer 20, and a first support layer 30.

[0058] The display light-emitting layer 10 is capable of emitting light to form a displayed image. The display light-emitting layer 10 includes, but is not limited to, an Organic Light Emitting Diode (OLED) display device. Structurally, the display light-emitting layer 10 can include a single-layer OLED display device, a dual-layer OLED display device, a triple-layer OLED display device, or a multi-layer OLED display device. A single-layer OLED display device comprises a substrate, an anode layer, an OLED light-emitting layer, and a cathode layer stacked together. A dual-layer OLED display device is based on a single-layer OLED display device, with hole transport layers or electron transport layers added to both sides of the OLED light-emitting layer. A triple-layer OLED display device comprises a substrate, an anode layer, a hole transport layer, an OLED light-emitting layer, an electron transport layer, and a cathode layer stacked together. A multi-layer OLED display device comprises multiple OLED light-emitting layers, or includes multiple stacked single-layer OLED display devices, multiple stacked dual-layer OLED display devices, or multiple stacked triple-layer OLED display devices. Classified by driving method, the display light-emitting layer 10 can be an active-matrix OLED display device or a passive-matrix OLED display device. When classified by luminescent material, the luminescent layer 10 can be a small molecule OLED display device or a polymer OLED display device.

[0059] Please refer to Figures 2, 3, and 4. Figure 3 is a front view of one structure of the display light-emitting layer 10 in the foldable display screen 100 shown in Figure 2, and Figure 4 is another front view of one structure of the display light-emitting layer 10 in the foldable display screen 100 shown in Figure 2. The display light-emitting layer 10 includes at least one non-bending display area 101 and at least one bending display area 102, with the non-bending display area 101 and the bending display area 102 arranged adjacent to each other.

[0060] During the folding process of the foldable display screen 100, the non-bending display area 101 does not bend, while the bending display area 102 bends. This application does not specify the number of non-bending display areas 101 and the number of bending display areas 102 included in the display light-emitting layer 10.

[0061] In one possible embodiment, as shown in FIG3, the display light-emitting layer 10 may include two non-bending display areas 101 and one bending display area 102. The two non-bending display areas 101 are described below as a first non-bending display area 110 and a second non-bending display area 112, respectively. The first non-bending display area 110, the bending display area 102 and the second non-bending display area 112 are connected adjacent to each other in sequence.

[0062] In another possible embodiment, as shown in FIG4, the display light-emitting layer 10 may include three non-bending display areas 101 and two bending display areas 102. The three non-bending display areas 101 are described below as the third non-bending display area 113, the fourth non-bending display area 114 and the fifth non-bending display area 115, respectively, and the two bending display areas 102 are described as the first bending display area 121 and the second bending display area 122, respectively. The third non-bending display area 113, the first bending display area 121, the fourth non-bending display area 114, the second bending display area 122 and the fifth non-bending display area 115 are connected adjacent to each other in sequence.

[0063] Of course, in other possible embodiments, the number of non-bent display areas 101 can be greater than three, and the number of bent display areas 102 can be greater than two. The number of non-bent display areas 101 can be equal to the number of bent display areas 102 plus one.

[0064] The light-transmitting cover layer 20 is used to protect the display light-emitting layer 10. The light-transmitting cover layer 20 allows light emitted from the display light-emitting layer 10 to pass through, meaning it is light-transmitting. The material of the light-transmitting cover layer 20 includes, but is not limited to, glass or plastic. The light-transmitting cover layer 20 is bendable. The structure of the light-transmitting cover layer 20 can be single-layered, double-layered, or multi-layered. In this embodiment, the light-transmitting cover layer 20 is a single-layered structure.

[0065] A light-transmitting cover layer 20 is disposed on the display side of the display light-emitting layer 10 and covers the non-bending display area 101 and the bending display area 102. In this application, the display side of the display light-emitting layer 10 can also be understood as the light-emitting side of the display light-emitting layer 10, that is, the light emitted by the display light-emitting layer 10 is emitted through the light-transmitting cover layer 20. The length of the light-transmitting cover layer 20 can be greater than or equal to the length of the display light-emitting layer 10. The width of the light-transmitting cover layer 20 can be greater than or equal to the width of the display light-emitting layer 10. It is understood that the area of ​​the light-transmitting cover layer 20 is greater than or equal to the area of ​​the display light-emitting layer 10 so that the light-transmitting cover layer 20 can cover the non-bending display area 101 and the bending display area 102. By having the light-transmitting cover layer 20 cover the non-bending display area 101 and the bending display area 102, the light-transmitting cover layer can provide protection for the entire display light-emitting layer 10.

[0066] In this embodiment of the application, as shown in FIG2, the foldable display screen 100 further includes a first adhesive layer 41. The first adhesive layer 41 is disposed between the light-transmitting cover layer 20 and the display light-emitting layer 10, and is used to connect the light-transmitting cover layer 20 and the display light-emitting layer 10. The material of the first adhesive layer 41 includes, but is not limited to, solid optical adhesive (Optically Clear Adhesive, OCA), liquid optical adhesive (Optical Clear Resin, OCR), photosensitive adhesive, double-sided adhesive, etc.

[0067] In one possible embodiment, the first adhesive layer 41 may be made of OCA. In this embodiment, the thickness of the first adhesive layer 41 ranges from approximately 25 μm to 75 μm. Exemplarily, the thickness of the first adhesive layer 41 may be 25 μm, or 30 μm, or 35 μm, or 40 μm, or 45 μm, or 50 μm, or 55 μm, or 60 μm, or 65 μm, or 70 μm, or 75 μm.

[0068] In another possible embodiment, the material of the first adhesive layer 41 can be OCR. In this embodiment, the thickness of the first adhesive layer 41 ranges from approximately 5µm to 20µm. Exemplarily, the thickness of the first adhesive layer 41 can be 5µm, or 6µm, or 7µm, or 8µm, or 9µm, or 10µm, or 11µm, or 12µm, or 13µm, or 14µm, or 15µm, or 16µm, or 17µm, or 18µm, or 19µm, or 20µm.

[0069] Since OCR is a liquid adhesive, it has better wetting and bonding effects. Therefore, by making the first adhesive layer 41 of OCR material, it is possible to design a thinner first adhesive layer 41 while ensuring bonding effect. For example, the thickness of the first adhesive layer 41 can be reduced to less than 10um, which facilitates the thinner and lighter design of the foldable display screen 100. In addition, the thinner design of the first adhesive layer 41 can also reduce the viscous flow deformation of the first adhesive layer 41 after multiple folds, thereby helping to reduce creases in the foldable display screen 100.

[0070] Please refer to Figures 2, 5, and 6. Figure 5 is a front view of one structure of the first support layer 30 in the foldable display screen 100 shown in Figure 2, and Figure 6 is another front view of the first support layer 30 in the foldable display screen 100 shown in Figure 2. The first support layer 30 is used to support the display light-emitting layer 10 and to form protection on the non-display side of the display light-emitting layer 10. The first support layer 30 is in the shape of a plate of unequal thickness. The material of the first support layer 30 includes, but is not limited to, a single metal, an alloy, stainless steel, carbon fiber, or glass.

[0071] The first support layer 30 is disposed on the side of the display light-emitting layer 10 opposite to the light-transmitting cover layer 20, and covers the non-bending display area 101 and the bending display area 102. It is understood that the light-transmitting cover layer 20, the display light-emitting layer 10, and the first support layer 30 are stacked sequentially. The length of the first support layer 30 can be greater than or equal to the length of the display light-emitting layer 10, and the width of the first support layer 30 can be greater than or equal to the width of the display light-emitting layer 10. It is understood that the area of ​​the first support layer 30 is greater than or equal to the area of ​​the display light-emitting layer 10, so that the first support layer 30 can cover the non-bending display area 101 and the bending display area 102. By covering the non-bending display area 101 and the bending display area 102 with the first support layer 30, the first support layer 30 can provide support and protection for the entire display light-emitting layer 10.

[0072] The first support layer 30 includes at least one non-bending support portion 301 and at least one bending support portion 302. During the folding process of the foldable display screen 100, the non-bending support portion 301 does not bend, while the bending support portion 302 bends. It is understood that the bending support portion 302 of the first support layer 30 is bendable. This application does not specifically limit the number of non-bending support portions 301 and the number of bending support portions 302 included in the first support layer 30. The number of non-bending support portions 301 may be equal to the number of non-bending display areas 101. The number of bending support portions 302 may be equal to the number of bending display areas 102.

[0073] In one possible embodiment, as shown in FIG5, the first support layer 30 may include two non-bending support portions 301 and one bending support portion 302. The two non-bending support portions 301 are described below as the first non-bending support portion 310 and the second non-bending support portion 312, respectively. The first non-bending support portion 310, the bending support portion 302 and the second non-bending support portion 312 are connected adjacent to each other in sequence.

[0074] In another possible embodiment, as shown in FIG6, the first support layer 30 may include three non-bending support portions 301 and two bending support portions 302. The three non-bending support portions 301 are described below as the third non-bending support portion 313, the fourth non-bending support portion 314 and the fifth non-bending support portion 315, respectively, and the two bending support portions 302 are described as the first bending support portion 321 and the second bending support portion 322, respectively. The third non-bending support portion 313, the first bending support portion 321, the fourth non-bending support portion 314, the second bending support portion 322 and the fifth non-bending support portion 315 are connected adjacent to each other in sequence.

[0075] Of course, in other possible embodiments, the number of non-bending support portions 301 can be greater than three, and the number of bending support portions 302 can be greater than two. Specifically, the number of non-bending support portions 301 can be equal to the number of bending support portions 302 plus one.

[0076] The non-bending support part 301 is supported on the side of the non-bending display area 101 away from the light-transmitting cover layer 20, and the bending support part 302 is supported on the side of the bending display area 102 away from the light-transmitting cover layer 20.

[0077] Understandably, the non-bending support portion 301 covers and supports the non-bending display area 101, and the bending support portion 302 covers and supports the bending display area 102. Specifically, the non-bending support portion 301 can directly support the side of the non-bending display area 101 facing away from the light-transmitting cover layer 20, meaning the surface of the non-bending support portion 301 can directly contact the surface of the non-bending display area 101 facing away from the light-transmitting cover layer 20. Alternatively, the non-bending support portion 301 can indirectly support the side of the non-bending display area 101 facing away from the light-transmitting cover layer 20, meaning the surface of the non-bending support portion 301 does not directly contact the surface of the non-bending display area 101 facing away from the light-transmitting cover layer 20. The bending support 302 can be directly supported on the side of the bent display area 102 away from the light-transmitting cover layer 20, that is, the surface of the bending support 302 can directly contact the surface of the side of the bent display area 102 away from the light-transmitting cover layer 20. Alternatively, the bending support 302 can be indirectly supported on the side of the bent display area 102 away from the light-transmitting cover layer 20, that is, the surface of the bending support 302 and the surface of the side of the bent display area 102 away from the light-transmitting cover layer 20 are not in direct contact.

[0078] The thickness of the bent support portion 302 is less than the thickness of the non-bent support portion 301. It is understood that the first support layer 30 in this application is a support layer of unequal thickness. In embodiments where the first support layer 30 is made of glass, the first support layer 30 is UFG glass. Due to the thickness difference between the bent support portion 302 and the non-bent support portion 301, a first notch is formed on the side of the bent support portion 302 facing away from the display light-emitting layer 10. It is understood that the surface of the first support layer 30 supporting the display light-emitting layer 10 is planar, and the surface of the first support layer 30 facing away from the display light-emitting layer 10 is concave.

[0079] By making the thickness of the bent support portion 302 less than the thickness of the non-bent support portion 301, the overall rigidity of the first support layer 30 and the bendability of the bent support portion 302 can be ensured, thereby balancing the support effect of the first support layer 30 on the display light-emitting layer 10 and the foldability of the bent support portion 302.

[0080] Optionally, the thickness of the bent support portion 302 is less than or equal to 1 / 2 the thickness of the non-bent support portion 301; or, the thickness of the bent support portion 302 is less than or equal to 1 / 3 the thickness of the non-bent support portion 301; or, the thickness of the bent support portion 302 is less than or equal to 1 / 4 the thickness of the non-bent support portion 301.

[0081] In this embodiment, the thickness of the non-bending support portion 301 can be uniform, meaning it can be a support portion of equal thickness. Similarly, the thickness of the bending support portion 302 can be uniform, meaning it can be a support portion of equal thickness. Of course, in other possible embodiments, the thickness of the non-bending support portion 301 can be non-uniform, meaning it can vary, for example, gradually. The thickness of the bending support portion 302 can also be non-uniform, meaning it can vary, for example, gradually. In embodiments where both the non-bending support portion 301 and the bending support portion 302 have non-uniform thicknesses, the fact that the thickness of the bending support portion 302 is less than the thickness of the non-bending support portion 301 can be understood as the maximum thickness of the bending support portion 302 being less than the minimum thickness of the non-bending support portion 301.

[0082] As shown in Figure 2, in this embodiment of the application, the foldable display screen 100 further includes a second adhesive layer 42. The second adhesive layer 42 is disposed between the first support layer 30 and the display light-emitting layer 10, and is used to connect the first support layer 30 and the display light-emitting layer 10. The material of the second adhesive layer 42 includes, but is not limited to, OCA, OCR, photosensitive adhesive, double-sided adhesive, etc.

[0083] In one possible embodiment, the material of the second adhesive layer 42 may be OCA. In this embodiment, the thickness of the second adhesive layer 42 ranges from approximately 25µm to 75µm. Exemplarily, the thickness of the second adhesive layer 42 may be 25µm, or 30µm, or 35µm, or 40µm, or 45µm, or 50µm, or 55µm, or 60µm, or 65µm, or 70µm, or 75µm.

[0084] In another possible embodiment, the material of the second adhesive layer 42 can be OCR. In this embodiment, the thickness of the second adhesive layer 42 ranges from approximately 5µm to 20µm. Exemplarily, the thickness of the second adhesive layer 42 can be 5µm, 6µm, 7µm, 8µm, 9µm, 10µm, 11µm, 12µm, 13µm, 14µm, 15µm, 16µm, 17µm, 18µm, 19µm, or 20µm.

[0085] Since OCR is a liquid adhesive, it has better wetting and bonding effects. Therefore, by making the material of the second adhesive layer 42 OCR, it is possible to design a thinner second adhesive layer 42 while ensuring the bonding effect. For example, the thickness of the second adhesive layer 42 can be reduced to less than 10um, which facilitates the thinner and lighter design of the foldable display screen 100. In addition, the thinner design of the second adhesive layer 42 can also reduce the viscous flow deformation of the second adhesive layer 42 after multiple folds, thereby helping to reduce creases in the foldable display screen 100.

[0086] The material of the second adhesive layer 42 may be the same as or different from that of the first adhesive layer 41. The thickness of the second adhesive layer 42 may be the same as or different from that of the first adhesive layer 41.

[0087] The foldable display screen 100 provided in this application includes a display light-emitting layer 10, a light-transmitting cover layer 20, and a first support layer 30. The non-bending support portion 301 of the first support layer 30 supports the non-bending display area 101 of the display light-emitting layer 10. The non-bending support portion 301 is relatively thick, while the bending support portion 302 of the first support layer 30 supports the bending display area 102 of the display light-emitting layer 10. The bending support portion 302 is relatively thin. This non-uniform thickness design of the first support layer 30 ensures the foldability of the bending support portion 302 and increases the overall strength of the first support layer 30, improving the support and protection effect on the display light-emitting layer 10. Simultaneously, by placing the first support layer 30 on the side of the display light-emitting layer 10 away from the light-transmitting cover layer 20 and covering both the non-bending display area 101 and the bending display area 102 of the display light-emitting layer 10, the non-bending support portion 301 supports the non-bending display area 101 and the bending display area 102 of the display light-emitting layer 10. The non-bending display area 101 is located on the side opposite to the light-transmitting cover layer 20, and the bending support part 302 is supported on the side of the bending display area 102 opposite to the light-transmitting cover layer 20. This ensures that the non-bending support part 301 provides a completely flat support for the non-bending display area 101, and the bending support part 302 provides a completely flat support for the bending display area 102. This reduces stress concentration and effectively reduces creases in the foldable display screen 100. Furthermore, since the non-bending support part 301 covers the non-bending display area 101 and the bending support part 302 covers the bending display area 102, there are no openings on either the non-bending support part 301 or the bending support part 302. This prevents the formation of local ribs or spikes on the first support layer 30, thus avoiding damage to the display light-emitting layer 10 by the first support layer 30. This further enhances the support and protection effect of the first support layer 30 on the display light-emitting layer 10. Furthermore, since the bending support portion 302 covers the bending display area 102, there is no need to attach a dustproof film or the like to the side of the bending support portion 302 away from the display light-emitting layer 10 for dust prevention. This avoids creases caused by creep of the dustproof film after multiple folds, and can further reduce creases on the foldable display screen 100.

[0088] Understandably, this application achieves the foldability of the first support layer 30 and ensures reliable support for the display light-emitting layer 10 by designing a first support layer 30 of unequal thickness. This eliminates the need for openings in the first support layer 30, preventing the formation of ribs, spikes, etc., and thus avoiding damage to the display light-emitting layer 10 from external forces (e.g., drops), thereby improving the protection of the display light-emitting layer 10. Simultaneously, since there are no openings in the bending support portion 302, it can provide a flat support for the bent display area 102, and the stiffness of the bending support portion 302 remains constant. During folding, it can provide uniform traction to the film and adhesive materials in the foldable display screen 100, thereby reducing creases and film marks on the foldable display screen 100.

[0089] In one possible embodiment, the thickness of the non-bending support portion 301 ranges from 100µm to 180µm, and the thickness of the bending support portion 302 ranges from 30µm to 80µm.

[0090] Optionally, the thickness of the non-bending support portion 301 ranges from 100µm to 150µm, and the thickness of the bending support portion 302 ranges from 30µm to 50µm; or, the thickness of the non-bending support portion 301 ranges from 150µm to 180µm, and the thickness of the bending support portion 302 ranges from 50µm to 80µm; or, the thickness of the non-bending support portion 301 ranges from 100µm to 150µm, and the thickness of the bending support portion 302 ranges from 50µm to 80µm; or, the thickness of the non-bending support portion 301 ranges from 150µm to 180µm, and the thickness of the bending support portion 302 ranges from 30µm to 50µm.

[0091] For example, the thickness of the non-bending support portion 301 can be 100um, or 110um, or 120um, or 130um, or 140um, or 150um, or 160um, or 170um, or 180um; the thickness of the bending support portion 302 can be 30um, or 40um, or 50um, or 60um, or 70um, or 80um.

[0092] By making the thickness of the non-bending support portion 301 range from 100µm to 180µm, the first support layer 30 as a whole can have high rigidity, ensuring the support and protection effect of the first support layer 30 on the display light-emitting layer 10. By making the thickness of the bending support portion 302 range from 30µm to 80µm, both the support effect of the bending support portion 302 on the bending display area 102 and the bendability of the bending support portion 302 can be taken into account.

[0093] In one possible embodiment, as shown in FIG7, FIG7 is a partial cross-sectional schematic diagram of the first support layer 30 of the foldable display screen 100 shown in FIG2, which further includes a transition support portion 303. The first support layer 30 also includes a transition support portion 303, which is located between the non-bending support portion 301 and the bending support portion 302. The thickness of the transition support portion 303 gradually decreases in the direction from the non-bending support portion 301 to the bending support portion 302.

[0094] Understandably, in this embodiment, the first support layer 30 has a region with a gradually changing thickness. Specifically, the thickness of the end of the transition support portion 303 connecting to the non-bending support portion 301 can be equal to the thickness of the non-bending support portion 301, and the thickness of the end of the transition support portion 303 connecting to the bending support portion 302 can be equal to the thickness of the bending support portion 302. During the folding process of the foldable display screen 100, the transition support portion 303 may not bend, or may be partially bent.

[0095] In one possible embodiment, a first support plate of a first thickness is provided, and a cutting or etching process is performed on one side of the first support plate to form a transition support portion 303 and a bent support portion 302 of a second thickness. The first thickness is greater than the second thickness, the thickness of the non-bent support portion 301 is the first thickness, and the thickness of the transition support portion 303 in the direction from the non-bent support portion 301 to the bent support portion 302 gradually decreases from the first thickness to the second thickness.

[0096] In another possible embodiment, a stepped second support plate is provided, and material is filled in the thinner areas of the second support plate to form a transition support portion 303. In this embodiment, the thicker areas of the second support plate form a non-bending support portion 301, the thinner areas form a bending support portion 302, and the material-filled areas form the transition support portion 303. The material filling includes, but is not limited to, forming a filler that fixes the second support plate by bonding, thermosetting, or UV curing. The filler material can be a resin, such as epoxy resin.

[0097] Since the thickness of the bent support portion 302 is less than the thickness of the non-bending support portion 301, by including a transition support portion 303 in the first support layer 30, the thickness of the transition support portion 303 gradually decreases in the direction from the non-bending support portion 301 to the bent support portion 302. This reduces the stiffness difference between the non-bending support portion 301 and the bent support portion 302, thereby helping to reduce stress concentration in the adhesive and film materials between the non-bending support portion 301 and the bent support portion 302, which could lead to film marks.

[0098] Furthermore, as shown in Figure 8, which is a partial cross-sectional view of the foldable display screen 100 shown in Figure 2, the foldable display screen 100 also includes a second support layer 60. The second support layer 60 is used to support the display light-emitting layer 10 and to form protection on the non-display side of the display light-emitting layer 10.

[0099] The display light-emitting layer 10, the second support layer 60, and the first support layer 30 are stacked sequentially. It is understood that in this embodiment, the light-transmitting cover layer 20, the first adhesive layer 41, the display light-emitting layer 10, the second support layer 60, and the first support layer 30 are stacked sequentially. The second support layer 60 supports the display light-emitting layer 10 on the side opposite to the light-transmitting cover layer 20. The length of the second support layer 60 can be greater than or equal to the length of the display light-emitting layer 10, and the width of the second support layer 60 can be greater than or equal to the width of the display light-emitting layer 10. It is understood that the area of ​​the second support layer 60 is greater than or equal to the area of ​​the display light-emitting layer 10, and the second support layer 60 can support and cover the non-bent display area 101 and the bent display area 102.

[0100] The second support layer 60 is made of glass. The second support layer 60 has a uniform thickness, ranging from 30µm to 50µm. In this embodiment, the second support layer 60 is ultra-thin flexible glass (UTG). The second support layer 60 is shaped like a plate of uniform thickness. The second support layer 60 is bendable overall.

[0101] Optionally, the thickness of the second support layer 60 ranges from 30µm to 40µm; or, the thickness of the second support layer 60 ranges from 40µm to 50µm. For example, the thickness of the second support layer 60 can be 30µm, 31µm, 32µm, 33µm, 34µm, 35µm, 36µm, 37µm, 38µm, 39µm, 40µm, 41µm, 42µm, 43µm, 44µm, 45µm, 46µm, 47µm, 48µm, 49µm, or 50µm.

[0102] In this embodiment, the foldable display screen 100 further includes a third adhesive layer 43 and a fourth adhesive layer 44. The third adhesive layer 43 is disposed between the second support layer 60 and the display light-emitting layer 10, and is used to connect the second support layer 60 and the display light-emitting layer 10. The fourth adhesive layer 44 is disposed between the second support layer 60 and the first support layer 30, and is used to connect the second support layer 60 and the first support layer 30. The material of the third adhesive layer 43 includes, but is not limited to, OCA, OCR, photosensitive adhesive, double-sided adhesive, etc., and the material of the fourth adhesive layer 44 includes, but is not limited to, OCA, OCR, photosensitive adhesive, double-sided adhesive, etc.

[0103] In one possible embodiment, both the third adhesive layer 43 and the fourth adhesive layer 44 can be made of OCA. In this embodiment, the thickness of the third adhesive layer 43 is approximately 25µm to 75µm, and the thickness of the fourth adhesive layer 44 is approximately 25µm to 75µm.

[0104] In another possible embodiment, both the third adhesive layer 43 and the fourth adhesive layer 44 can be made of OCR material. The thickness of the third adhesive layer 43 is less than or equal to 20 μm, and the thickness of the fourth adhesive layer 44 is less than or equal to 20 μm. In this embodiment, the relatively thin thickness of the third adhesive layer 43 and the fourth adhesive layer 44 ensures the bonding effect while facilitating the lightweight design of the foldable display screen and reducing creases in the foldable display screen 100.

[0105] By providing a second support layer 60, it is advantageous to directly form the display light-emitting layer 10 on the second support layer 60, simplifying the production and manufacturing of the foldable display screen 100. Furthermore, the second support layer 60 and the first support layer 30 together provide a support effect, resulting in a more stable and reliable support for the display light-emitting layer 10. By making the second support layer 60 of glass, a brittle material that does not undergo viscous flow deformation, creases in the foldable display screen 100 can be reduced. Additionally, the second support layer 60 has a high elastic modulus, allowing its own rebound force to provide restoring traction to the creeping adhesive material within the foldable display screen 100 during bending and unfolding, further reducing creases. By setting the thickness of the second support layer 60 to 30µm, it is possible to provide restoring traction to the adhesive material while ensuring the bendability of the second support layer 60.

[0106] In one possible embodiment, the light-transmitting cover layer 20 is made of glass, and the thickness of the light-transmitting cover layer 20 is uniform, ranging from 40µm to 60µm.

[0107] In this embodiment, the light-transmitting cover layer 20 is ultra-thin flexible glass (UTG). The light-transmitting cover layer 20 is in the shape of a plate of uniform thickness. The light-transmitting cover layer 20 as a whole is bendable.

[0108] Optionally, the thickness of the light-transmitting cover layer 20 ranges from 40µm to 50µm; or, the thickness of the light-transmitting cover layer 20 ranges from 50µm to 60µm. For example, the thickness of the light-transmitting cover layer 20 can be 40µm, or 41µm, or 42µm, or 43µm, or 44µm, or 45µm, or 46µm, or 47µm, or 48µm, or 49µm, or 50µm, or 51µm, or 52µm, or 53µm, or 54µm, or 55µm, or 56µm, or 57µm, or 58µm, or 59µm, or 60µm.

[0109] In one embodiment where the foldable display screen 100 includes a light-transmitting cover layer 20 and a second support layer 60, and the thickness of the light-transmitting cover layer 20 is uniform, the thickness of the light-transmitting cover layer 20 may be greater than the thickness of the second support layer 60.

[0110] By making the material of the light-transmitting cover layer 20 glass, and making the thickness of the light-transmitting cover layer 20 uniform and ranging from 40um to 60um, there is no need to design other plastic protective layers or other adhesive layers on the side of the light-transmitting cover layer 20 away from the display light-emitting layer 10. That is, the coating design can be directly applied to the light-transmitting cover layer 20, thereby reducing the thickness of the foldable display screen 100 and avoiding creases caused by the viscous flow characteristics of other plastic protective layers and other adhesive layers.

[0111] In another possible embodiment, please refer to Figures 9 to 11. Figure 9 is a partial cross-sectional schematic diagram of the light-transmitting cover layer 20 of the foldable display screen 100 shown in Figure 2, including a non-bending cover portion 201 and a bending cover portion 202. Figure 10 is a front structural schematic diagram of the light-transmitting cover layer 20 in the foldable display screen 100 shown in Figure 9. Figure 11 is another front structural schematic diagram of the light-transmitting cover layer 20 in the foldable display screen 100 shown in Figure 9. The light-transmitting cover layer 20 includes at least one non-bending cover portion 201 and at least one bending cover portion 202. The non-bending cover portion 201 covers the non-bending display area 101, and the bending cover portion 202 covers the bending display area 102. The thickness of the bending cover portion 202 is less than the thickness of the non-bending cover portion 201.

[0112] During the folding process of the foldable display screen 100, the non-bending cover plate portion 201 does not bend, while the bending cover plate portion 202 bends. It is understood that the bending cover plate portion 202 of the light-transmitting cover plate layer 20 is bendable. This application does not specifically limit the number of non-bending cover plate portions 201 and bending cover plate portions 202 included in the light-transmitting cover plate layer 20. The number of non-bending cover plate portions 201 can be equal to the number of non-bending display areas 101. The number of bending cover plate portions 202 can be equal to the number of bending display areas 102.

[0113] In one possible embodiment, as shown in FIG10, the light-transmitting cover layer 20 may include two non-bending cover portions 201 and one bending cover portion 202. The two non-bending cover portions 201 are described below as a first non-bending cover portion 210 and a second non-bending cover portion 212, respectively. The first non-bending cover portion 210, the bending cover portion 202 and the second non-bending cover portion 212 are connected adjacent to each other in sequence.

[0114] In another possible embodiment, as shown in FIG11, the light-transmitting cover layer 20 may include three non-bending cover portions 201 and two bending cover portions 202. The three non-bending cover portions 201 are referred to as the third non-bending cover portion 213, the fourth non-bending cover portion 214 and the fifth non-bending cover portion 215, respectively, and the two bending cover portions 202 are referred to as the first bending cover portion 220 and the second bending cover portion 221, respectively. The third non-bending cover portion 213, the first bending cover portion 220, the fourth non-bending cover portion 214, the second bending cover portion 221 and the fifth non-bending cover portion 215 are connected adjacent to each other in sequence.

[0115] Of course, in other possible embodiments, the number of non-bending cover plate portions 201 may be greater than three, and the number of bending cover plate portions 202 may be greater than two. Specifically, the number of non-bending cover plate portions 201 may be equal to the number of bending cover plate portions 202 plus one.

[0116] The length of the light-transmitting cover layer 20 can be greater than or equal to the length of the display light-emitting layer 10, and the width of the light-transmitting cover layer 20 can be greater than or equal to the width of the display light-emitting layer 10. It is understood that the area of ​​the light-transmitting cover layer 20 is greater than or equal to the area of ​​the display light-emitting layer 10, so that the light-transmitting cover layer 20 can cover the non-bent display area 101 and the bent display area 102.

[0117] Understandably, in this embodiment, the light-transmitting cover layer 20 is a cover layer of unequal thickness. For example, a second notch will be formed on the side of the bent cover portion 202 that is away from the display light-emitting layer 10.

[0118] In embodiments where the light-transmitting cover layer 20 is made of glass, it is UFG glass. Due to the thickness difference between the bent cover portion 202 and the non-bent cover portion 201, a second notch is formed on the side of the bent cover portion 202 facing away from the display light-emitting layer 10. It is understood that the surface of the light-transmitting cover layer 20 facing the display light-emitting layer 10 is planar, and the surface of the light-transmitting cover layer 20 facing away from the display light-emitting layer 10 is concave.

[0119] By making the thickness of the bent cover portion 202 less than the thickness of the non-bent cover portion 201, the overall rigidity of the light-transmitting cover layer 20 and the bendability of the bent cover portion 202 can be ensured, thereby balancing the protective effect of the light-transmitting cover layer 20 on the display light-emitting layer 10 and the foldability of the bent cover portion 202.

[0120] For another example, a second notch is formed on the side of the bent cover plate portion 202 facing the display light-emitting layer 10. In this way, the thickness of the bent cover plate portion 202 is less than the thickness of the non-bent cover plate portion 201, so as to ensure the overall rigidity of the light-transmitting cover plate layer 20 and the bendability of the bent cover plate portion 202, thereby balancing the protective effect of the light-transmitting cover plate layer 20 on the display light-emitting layer 10 and the foldability of the bent cover plate portion 202.

[0121] In other embodiments, the bent cover plate portion 202 has notches on both the side facing the display light-emitting layer 10 and the side away from the display light-emitting layer 10, so that the thickness of the bent cover plate portion 202 is less than the thickness of the non-bent cover plate portion 201.

[0122] Optionally, the thickness of the bent cover portion 202 is less than or equal to 1 / 2 the thickness of the non-bent cover portion 201; or, the thickness of the bent cover portion 202 is less than or equal to 1 / 3 the thickness of the non-bent cover portion 201; or, the thickness of the bent cover portion 202 is less than or equal to 1 / 4 the thickness of the non-bent cover portion 201.

[0123] In this embodiment, the thickness of the non-bending cover plate portion 201 can be uniform, meaning it can be a cover plate portion of equal thickness. Similarly, the thickness of the bending cover plate portion 202 can be uniform, meaning it can be a cover plate portion of equal thickness. Of course, in other possible embodiments, the thickness of the non-bending cover plate portion 201 can be non-uniform, meaning it can vary, for example, gradually. Similarly, the thickness of the bending cover plate portion 202 can be non-uniform, meaning it can vary, for example, gradually. In embodiments where both the non-bending cover plate portion 201 and the bending cover plate portion 202 have non-uniform thicknesses, the fact that the thickness of the bending cover plate portion 202 is less than the thickness of the non-bending cover plate portion 201 can be understood as the maximum thickness of the bending cover plate portion 202 being less than the minimum thickness of the non-bending cover plate portion 201.

[0124] In one possible embodiment, the thickness of the non-bending cover portion 201 ranges from 70µm to 200µm, and the thickness of the bending cover portion 202 ranges from 30µm to 60µm.

[0125] Optionally, the thickness of the non-bending cover plate portion 201 ranges from 150µm to 200µm, and the thickness of the bending cover plate portion 202 ranges from 30µm to 50µm; or, the thickness of the non-bending cover plate portion 201 ranges from 70µm to 150µm, and the thickness of the bending cover plate portion 202 ranges from 50µm to 60µm; or, the thickness of the non-bending cover plate portion 201 ranges from 150µm to 200µm, and the thickness of the bending cover plate portion 202 ranges from 50µm to 60µm; or, the thickness of the non-bending cover plate portion 201 ranges from 70µm to 150µm, and the thickness of the bending cover plate portion 202 ranges from 30µm to 50µm.

[0126] For example, the thickness of the non-bending cover portion 201 can be 70um, or 80um, or 90um, or 100um, or 110um, or 120um, or 130um, or 140um, or 150um, or 160um, or 170um, or 180um, or 190um, or 200um; the thickness of the bending cover portion 202 can be 30um, or 35um, or 40um, or 45um, or 50um, or 55um, or 60um.

[0127] By making the thickness of the non-bending cover portion 201 range from 70µm to 200µm, the overall strength of the light-transmitting cover layer 20 can be made high, ensuring the protective effect of the light-emitting layer 10. By making the thickness of the bending cover portion 202 range from 30µm to 60µm, both the protective effect of the bending cover portion 202 on the bending display area 102 and the bendability of the bending cover portion 202 can be taken into account.

[0128] In one possible embodiment, as shown in FIG12, FIG12 is a partial cross-sectional schematic diagram of the light-transmitting cover layer 20 of the foldable display screen 100 shown in FIG9, which also includes a transition cover portion 203. The non-bending cover portion 201 also includes a transition cover portion 203, which is located between the non-bending cover portion 201 and the bending cover portion 202. The thickness of the transition cover portion 203 gradually decreases in the direction from the non-bending cover portion 201 to the bending cover portion 202.

[0129] Understandably, in this embodiment, the light-transmitting cover layer 20 has a region with a gradually changing thickness. Specifically, the thickness of the end of the transition cover portion 203 connecting to the non-bending cover portion 201 can be equal to the thickness of the non-bending cover portion 201, and the thickness of the end of the transition cover portion 203 connecting to the bending cover portion 202 can be equal to the thickness of the bending cover portion 202. During the folding process of the foldable display screen 100, the transition cover portion 203 may not bend, or may be partially bent.

[0130] Since the thickness of the bent cover portion 202 is less than the thickness of the non-bent cover portion 201, a ridge line will appear at the connection between the bent cover portion 202 and the non-bent cover portion 201. This ridge line is easily visible on the outside of the foldable display screen 100, affecting the usability and appearance consistency of the foldable display screen 100. Therefore, by including a transition cover portion 203 in the light-transmitting cover layer 20, the formation of a ridge line at the connection between the bent cover portion 202 and the non-bent cover portion 201 can be avoided, improving the user experience and the appearance consistency of the foldable display screen 100.

[0131] Further, as shown in Figure 13, which is a partial cross-sectional view of the foldable display screen 100 shown in Figure 8, it further includes a first coating 51 and a second coating 52. The foldable display screen 100 also includes a first coating 51 and a second coating 52. The second coating 52 is attached to the surface of the light-transmitting cover layer 20 facing away from the display light-emitting layer 10, and the first coating 51 is attached to the surface of the second coating 52 facing away from the light-transmitting cover layer 20. The hardness of the first coating 51 is greater than the hardness of the second coating 52.

[0132] In this embodiment, the foldable display screen 100 may include a first coating layer 51, a second coating layer 52, a light-transmitting cover layer 20, a first adhesive layer 41, a display and light-emitting layer 10, a second adhesive layer 42, and a first support layer 30, stacked sequentially. Alternatively, the foldable display screen 100 may include a first coating layer 51, a second coating layer 52, a light-transmitting cover layer 20, a first adhesive layer 41, a display and light-emitting layer 10, a third adhesive layer 43, a second support layer 60, a fourth adhesive layer 44, and a first support layer 30, stacked sequentially. The second coating layer 52 being attached to the surface of the light-transmitting cover layer 20 facing away from the display and light-emitting layer 10 can be understood as the second coating layer 52 being directly formed on the surface of the light-transmitting cover layer 20 facing away from the display and light-emitting layer 10. The first coating layer 51 being attached to the surface of the second coating layer 52 facing away from the light-transmitting cover layer 20 can be understood as the first coating layer 51 being directly formed on the surface of the second coating layer 52 facing away from the light-transmitting cover layer 20. The second coating 52 can be formed by methods including but not limited to coating, deposition, and spraying. The first coating 51 can be formed by methods including but not limited to coating, deposition, and spraying. The first coating 51 and / or the second coating 52 have anti-fingerprint properties.

[0133] Hardness refers to the coating's ability to resist localized pressure without permanent deformation. In one possible embodiment, the hardness of the first coating 51 being greater than the hardness of the second coating 52 can be achieved by the thickness of the first coating 51 being greater than the thickness of the second coating 52. Optionally, the sum of the thicknesses of the first coating 51 and the second coating 52 can range from 10 μm to 30 μm. For example, the thickness of the first coating 51 can range from 15 μm to 25 μm, and the thickness of the second coating 52 can range from 5 μm to 15 μm.

[0134] This embodiment further includes a first coating 51 and a second coating 52 in the foldable display screen 100. The second coating 52 is attached to the surface of the light-transmitting cover layer 20 away from the display light-emitting layer 10, and the first coating 51 is attached to the surface of the second coating 52 away from the light-transmitting cover layer 20. The double-layer coating can achieve explosion-proof and fingerprint-resistant properties of the foldable display screen 100. In this way, there is no need to set a plastic film layer and an adhesive layer with viscous flow characteristics between the light-transmitting cover layer 20 and the coating for explosion-proof and connection. The thickness of the foldable display screen 100 can be reduced, and more viscous flow deformation can be avoided, which can effectively reduce the creases of the foldable display screen 100.

[0135] In another possible embodiment, as shown in FIG14, FIG14 is a partial cross-sectional schematic diagram of the foldable display screen 100 shown in FIG13 further including a third coating 53. The foldable display screen 100 further includes a third coating 53. The third coating 53 is attached to the surface of the first support layer 30 on the side opposite to the display light-emitting layer 10.

[0136] In this embodiment, the foldable display screen 100 may include a first coating layer 51, a second coating layer 52, a light-transmitting cover layer 20, a first adhesive layer 41, a display and light-emitting layer 10, a second adhesive layer 42, a first support layer 30, and a third coating layer 53, stacked sequentially. Alternatively, the foldable display screen 100 may include the same three layers stacked sequentially. The third coating layer 53 is attached to the surface of the first support layer 30 facing away from the display and light-emitting layer 10, which can be understood as the third coating layer 53 being directly formed on the surface of the first support layer 30 facing away from the display and light-emitting layer 10. The forming method of the third coating layer 53 includes, but is not limited to, coating, deposition, and spraying. In embodiments where the first support layer 30 is made of glass, the third coating layer 53 can protect the first support layer 30, reducing the likelihood of cracking.

[0137] The third coating 53 can cover the non-bending support portion 301 and the bending support portion 302 of the first support layer 30, that is, the first support layer 30 can cover the entire surface of the first support layer 30.

[0138] In another possible embodiment, a fourth coating may be provided on the surface of the second support layer 60 facing away from the display light-emitting layer 10. The fourth coating adhering to the surface of the second support layer 60 facing away from the display light-emitting layer 10 can be understood as the fourth coating being directly formed on the surface of the second support layer 60 facing away from the display light-emitting layer 10. The formation method of the fourth coating includes, but is not limited to, coating, deposition, and spraying. In embodiments where the second support layer 60 is made of glass, the fourth coating can provide protection for the second support layer 60, reducing the likelihood of cracking.

[0139] The fourth coating can cover part or all of the surface of the second support layer 60 on the side opposite to the display light-emitting layer 10.

[0140] Of course, the embodiments in Figure 13 and Figure 14 can be combined to design a new embodiment. The embodiment in Figure 13 can be combined with the embodiment having a fourth coating to design a new embodiment. The embodiment in Figure 14 can be combined with the embodiment having a fourth coating to design a new embodiment.

[0141] Of course, in other embodiments, the surface of the second support layer 60 facing away from the display light-emitting layer 10 may not have a fourth coating.

[0142] Furthermore, as shown in Figure 15, which is a partial cross-sectional view of the foldable display screen 100 shown in Figure 14, the foldable display screen 100 also includes a conductive layer 54. The conductive layer 54 is attached to the surface of the third coating layer 53 on the side opposite to the display light-emitting layer 10.

[0143] In this embodiment, the foldable display screen 100 may include a first coating layer 51, a second coating layer 52, a light-transmitting cover layer 20, a first adhesive layer 41, a display and light-emitting layer 10, a second adhesive layer 42, a first support layer 30, a third coating layer 53, and a conductive layer 54, stacked sequentially. Alternatively, the foldable display screen 100 may include the same layers stacked sequentially. The conductive layer 54 is attached to the surface of the third coating layer 53 facing away from the display and light-emitting layer 10, which can be understood as the conductive layer 54 being directly formed on the surface of the third coating layer 53 facing away from the display and light-emitting layer 10. The forming method of the conductive layer 54 includes, but is not limited to, vapor deposition and electroplating. The conductive layer 54 may be a metal layer. The conductive layer 54 facilitates grounding of the foldable display screen 100, thereby reducing static electricity.

[0144] The conductive layer 54 may be attached only to the surface of the third coating layer 53 on the side away from the non-bending display area 101 of the display light-emitting layer 10, that is, the conductive layer 54 is provided corresponding to the non-bending support portion 301 of the first support layer 30.

[0145] Furthermore, referring to Figures 16 to 18, this application also provides a foldable electronic device 1000. Figure 16 is a schematic diagram of one structure of the foldable electronic device 1000 after folding according to an embodiment of this application; Figure 17 is a schematic diagram of another structure of the foldable electronic device 1000 after folding according to an embodiment of this application; and Figure 18 is a schematic diagram of yet another structure of the foldable electronic device 1000 after folding according to an embodiment of this application. The foldable electronic device 1000 includes a foldable housing assembly 200 and a foldable display screen 100 of any of the above embodiments, wherein the foldable housing assembly 200 is connected to the foldable display screen 100.

[0146] The foldable electronic device 1000 provided in this application can be a foldable mobile phone, a foldable tablet, etc. The following embodiments use a foldable mobile phone as an example, but include, but are not limited to, bi-fold and tri-fold mobile phones.

[0147] In one possible embodiment, as shown in FIG16, the foldable housing assembly 200 includes two housing assemblies and a pivot mechanism. The two housing assemblies are described below as a first housing assembly 21 and a second housing assembly 22. The first housing assembly 21 and the second housing assembly 22 are disposed on opposite sides of the pivot mechanism. The first housing assembly 21 is connected to the first non-bending display body 11 of the foldable display screen 100, and the second housing assembly 22 is connected to the second non-bending display body 12 of the foldable display screen 100. The pivot mechanism supports the bending display body 13 of the foldable display screen 100.

[0148] The foldable display screen 100 includes a first non-bending display body 11 comprising a first non-bending cover plate portion 210 of the light-transmitting cover plate layer 20, a first non-bending display area 110 of the display and light-emitting layer 10, and a first non-bending support portion 310 of the first support layer 30, as described in the above embodiments. The foldable display screen 100 also includes a bending cover plate portion 202 of the light-transmitting cover plate layer 20, a bending display area 102 of the display and light-emitting layer 10, and a bending support portion 302 of the first support layer 30, as described in the above embodiments. The foldable display screen 100 also includes a second non-bending cover plate portion 212 of the light-transmitting cover plate layer 20, a second non-bending display area 112 of the display and light-emitting layer 10, and a second non-bending support portion 312 of the first support layer 30, as described in the above embodiments. In this embodiment, the foldable electronic device 1000 includes, but is not limited to, outward-folding mobile phones and inward-folding mobile phones.

[0149] In another possible embodiment, referring to Figures 17 and 18, the foldable housing assembly 200 includes three housing assemblies and two pivot mechanisms. The three housing assemblies are referred to as the third housing assembly 23, the fourth housing assembly 24, and the fifth housing assembly 25, respectively. The two pivot mechanisms are referred to as the first pivot mechanism and the second pivot mechanism, respectively. The third housing assembly 23 and the fourth housing assembly 24 are disposed on opposite sides of the first pivot mechanism, and the fourth housing assembly 24 and the fifth housing assembly 25 are disposed on opposite sides of the second pivot mechanism. The third housing assembly 23 is connected to the third non-bending display body 14 of the foldable display screen 100, the fourth housing assembly 24 is connected to the fourth non-bending display body 15 of the foldable display screen 100, and the fifth housing assembly 25 is connected to the fifth non-bending display body 16 of the foldable display screen 100. The first pivot mechanism supports the first bending display body 17 of the foldable display screen 100, and the second pivot mechanism supports the second bending display body 18 of the foldable display screen 100.

[0150] The third non-bending display body 14 of the foldable display screen 100 includes the third non-bending cover plate portion 213 of the light-transmitting cover plate layer 20, the third non-bending display area 113 of the display and light-emitting layer 10, and the third non-bending support portion 313 of the first support layer 30, as described in the above embodiments. The fourth non-bending display body 15 of the foldable display screen 100 includes the fourth non-bending cover plate portion 214 of the light-transmitting cover plate layer 20, the fourth non-bending display area 114 of the display and light-emitting layer 10, and the fourth non-bending support portion 314 of the first support layer 30, as described in the above embodiments. The fifth non-bending display body 16 of the foldable display screen 100 includes the fifth non-bending cover plate portion 215 of the light-transmitting cover plate layer 20, the fifth non-bending display area 115 of the display and light-emitting layer 10, and the fifth non-bending support portion 315 of the first support layer 30, as described in the above embodiments. The first folding display body 17 of the foldable display screen 100 includes a first folding cover plate portion 220 of the light-transmitting cover plate layer 20, a first folding display area 121 of the display and light-emitting layer 10, and a first folding support portion 321 of the first support layer 30, as described in the above embodiment. The second folding display body 18 of the foldable display screen 100 includes a second folding cover plate portion 221 of the light-transmitting cover plate layer 20, a second folding display area 122 of the display and light-emitting layer 10, and a second folding support portion 322 of the first support layer 30, as described in the above embodiment. In this embodiment, the foldable electronic device 1000 includes, but is not limited to, a G-type tri-folding mobile phone, an S-type tri-folding mobile phone, etc.

[0151] The features mentioned above in the specification, claims, and drawings can be combined in any way as long as they are meaningful within the scope of this application. The advantages and features described for the foldable display screen 100 are applied accordingly to the foldable electronic device 1000.

[0152] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. A foldable display screen, characterized in that, include: The display light-emitting layer includes at least one non-bending display area and at least one bending display area, wherein the non-bending display area and the bending display area are disposed adjacent to each other; A light-transmitting cover layer is disposed on the display side of the display light-emitting layer, and covers the non-bent display area and the bent display area; and A first support layer is disposed on the side of the display light-emitting layer away from the light-transmitting cover layer, and covers the non-bending display area and the bending display area. The first support layer includes at least one non-bending support portion and at least one bending support portion. The non-bending support portion supports the non-bending display area on the side away from the light-transmitting cover layer, and the bending support portion supports the bending display area on the side away from the light-transmitting cover layer. Wherein, the thickness of the bending support portion is less than the thickness of the non-bending support portion, and / or, the foldable display screen further includes a second support layer, wherein the display light-emitting layer, the second support layer and the first support layer are stacked in sequence, and the material of the second support layer is glass.

2. The foldable display screen according to claim 1, characterized in that, The thickness of the non-bending support portion ranges from 100µm to 180µm, and the thickness of the bending support portion ranges from 30µm to 80µm.

3. The foldable display screen according to claim 1, characterized in that, The bent support portion forms a first notch on the side opposite to the display light-emitting layer.

4. The foldable display screen according to claim 1, characterized in that, The thickness of the non-bending support portion is uniform, and the thickness of the bending support portion is also uniform.

5. The foldable display screen according to claim 1, characterized in that, The first support layer further includes a transition support portion located between the non-bending support portion and the bending support portion, wherein the thickness of the transition support portion gradually decreases in the direction from the non-bending support portion to the bending support portion.

6. The foldable display screen according to claim 1, characterized in that, The foldable display screen further includes a first adhesive layer, which is disposed between the light-transmitting cover layer and the display light-emitting layer to connect the light-transmitting cover layer and the display light-emitting layer.

7. The foldable display screen according to claim 1, characterized in that, When the foldable display screen does not include the second support layer, the foldable display screen further includes a second adhesive layer, which is disposed between the first support layer and the display light-emitting layer for connecting the first support layer and the display light-emitting layer.

8. The foldable display screen according to claim 1, characterized in that, The second support layer has a uniform thickness, ranging from 30µm to 50µm.

9. The foldable display screen according to claim 1, characterized in that, The foldable display screen further includes a third adhesive layer and a fourth adhesive layer. The third adhesive layer is disposed between the second support layer and the display light-emitting layer to connect the second support layer and the display light-emitting layer. The fourth adhesive layer is disposed between the second support layer and the first support layer to connect the second support layer and the first support layer.

10. The foldable display screen according to claim 1, characterized in that, The at least one non-bending display area includes a first non-bending display area and a second non-bending display area, wherein the first non-bending display area, the bending display area, and the second non-bending display area are sequentially adjacent to each other, and the at least one non-bending support portion includes a first non-bending support portion and a second non-bending support portion, wherein the first non-bending support portion, the bending support portion, and the second non-bending support portion are sequentially adjacent to each other.

11. The foldable display screen according to claim 1, characterized in that, The at least one non-bending display area includes a third non-bending display area, a fourth non-bending display area, and a fifth non-bending display area. The at least one bending display area includes a first bending display area and a second bending display area. The third non-bending display area, the first bending display area, the fourth non-bending display area, the second bending display area, and the fifth non-bending display area are sequentially adjacent to each other. The at least one non-bending support portion includes a third non-bending support portion, a fourth non-bending support portion, and a fifth non-bending support portion. The at least one bending support portion includes a first bending support portion and a second bending support portion. The third non-bending support portion, the first bending support portion, the fourth non-bending support portion, the second bending support portion, and the fifth non-bending support portion are sequentially adjacent to each other.

12. The foldable display screen according to any one of claims 1 to 11, characterized in that, The light-transmitting cover layer is made of glass, and the thickness of the light-transmitting cover layer is uniform, ranging from 40µm to 60µm.

13. The foldable display screen according to any one of claims 1 to 11, characterized in that, The light-transmitting cover layer includes at least one non-bending cover portion and at least one bending cover portion. The non-bending cover portion covers the non-bending display area, and the bending cover portion covers the bending display area. The thickness of the bending cover portion is less than the thickness of the non-bending cover portion.

14. The foldable display screen according to claim 13, characterized in that, The thickness of the non-bending cover plate portion ranges from 70µm to 200µm, and the thickness of the bending cover plate portion ranges from 30µm to 60µm.

15. The foldable display screen according to claim 13, characterized in that, The bent cover plate portion forms a second notch on the side opposite to or towards the display light-emitting layer.

16. The foldable display screen according to claim 13, characterized in that, The thickness of the non-bent cover plate portion is uniform, and the thickness of the bent cover plate portion is uniform.

17. The foldable display screen according to claim 13, characterized in that, The light-transmitting cover layer also includes a transition cover portion, which is located between the non-bent cover portion and the bent cover portion, and the thickness of the transition cover portion gradually decreases in the direction from the non-bent cover portion to the bent cover portion.

18. The foldable display screen according to any one of claims 1 to 11, characterized in that, The foldable display screen further includes a first coating and a second coating, wherein the second coating is attached to the surface of the light-transmitting cover layer opposite to the display light-emitting layer, and the first coating is attached to the surface of the second coating opposite to the light-transmitting cover layer, wherein the hardness of the first coating is greater than that of the second coating; and / or, the foldable display screen further includes a third coating, wherein the third coating is attached to the surface of the first support layer opposite to the display light-emitting layer. And / or, the surface of the second support layer opposite to the display light-emitting layer is provided with a fourth coating.

19. The foldable display screen according to claim 18, characterized in that, The foldable display screen also includes a conductive layer attached to the surface of the third coating on the side opposite to the display light-emitting layer.

20. A foldable electronic device, characterized in that, It includes a foldable housing assembly and a foldable display screen according to any one of claims 1 to 19, wherein the foldable housing assembly is connected to the foldable display screen.

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