Cover plate, display screen, and electronic device

Abstract

The present application provides a cover plate, a display screen, and an electronic device. The cover plate comprises a first part, a second part, and a third part which are sequentially connected in a first direction, and the second part is capable of being bent. The second part of the cover plate comprises a glass layer, a first connection layer, and a film layer which are stacked in a second direction, the second direction being different from the first direction. A first edge of the glass layer of the second part is located on the inner side of a first edge of the first connection layer of the second part, and the first edge of the glass layer of the second part and the first connection layer of the second part define a first space. The cover plate further comprises a first compensation structure, and the first compensation structure is at least partially located in the first space and is fixedly connected to the first connection layer of the second part. The first compensation structure comprises a first sub-part and a second sub-part connected to the first sub-part, the first sub-part is located between the second sub-part and the glass layer, and the material used for the first sub-part comprises a curing adhesive. When the cover plate is applied to the display screen, the first compensation structure can reduce moisture-induced corrosion of the display screen.

Description

Cover plate, display screen and electronic equipment

[0001] This application claims priority to Chinese Patent Application No. 202410943229.2, filed on July 12, 2024, entitled "Cover Plate, Display Screen and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display device technology, and more particularly to a cover plate, a display screen, and an electronic device. Background Technology

[0003] In foldable electronic devices, flexible displays are used to achieve large screen sizes. These displays consist of a cover plate and a display panel stacked together. The cover plate protects the display panel. The cover plate includes a protective layer, an adhesive layer, and a glass layer. The glass layer improves the screen's resistance to pressure and reduces creases and light reflections. The cover plate is typically fixed to the display panel using adhesive. Thus, adhesive layers are present on both the top and bottom of the glass layer, forming a three-layer structure of adhesive layer-glass layer-adhesive layer after the cover plate is fixedly attached to the display panel.

[0004] During the manufacturing process of a display screen, lasers are used to cut the screen to match the screen size requirements of electronic devices. Because the glass layer is prone to breakage when laser-cut, the edges of the glass layer are typically recessed from the upper and lower adhesive layers to reduce the risk of cracking. The sides of the glass layer are connected by adhesive layers. Due to the recessed glass layer, a step difference is created around its perimeter, causing deformation of the upper and lower adhesive layers at the joints. When an electronic device switches between an open and folded state, the bending area of ​​the display screen deforms. With repeated bending, the joints between the two adhesive layers in the bending area become misaligned due to stress. External moisture can easily seep into the display area from this misalignment, leading to display failure. Summary of the Invention

[0005] This application provides a cover plate, a display screen, and an electronic device.

[0006] In a first aspect, embodiments of this application provide a cover plate. The cover plate includes a first portion, a second portion, and a third portion sequentially connected along a first direction, the second portion being bendable. The cover plate includes a glass layer, a first connecting layer, and a film layer stacked in a second direction, which is different from the first direction. A first edge of the glass layer of the second portion of the cover plate is located inside the first edge of the first connecting layer of the second portion of the cover plate, and the first edge of the glass layer of the second portion of the cover plate and the first connecting layer of the second portion of the cover plate enclose a first space. The cover plate also includes a first compensation structure, which is at least partially located within the first space and is fixedly connected to the first connecting layer of the second portion of the cover plate. The first compensation structure includes a first sub-part and a second sub-part connecting the first sub-part, the first sub-part being located between the second sub-part and the glass layer of the second portion of the cover plate, and the material used for the first sub-part includes a curing adhesive.

[0007] It is understood that the second part of the cover plate is bendable, and this second part is the bending area of ​​the cover plate. When the cover plate is used for a display screen, it can be fixedly connected to the display panel via a second connecting layer. The first compensation structure can be located on one side of the glass layer of the second part of the cover plate and connected between the first and second connecting layers of the second part of the cover plate. Compared to conventional solutions that do not include a first compensation structure, the first compensation structure in this application can be used to fill the edge space of the glass layer in the bending area of ​​the cover plate, eliminating initial air bubbles; it can also be used to prevent deformation caused by direct contact between the first and second connecting layers of the second part of the cover plate. At the interface between the second part of the cover plate and the first compensation structure, air bubbles are less likely to form due to misalignment after repeated bending. At the two interface points between the first compensation structure and the second connecting layer, air bubbles are less likely to form due to misalignment after repeated bending. The first compensation structure can also regulate the stress during the bending process, increasing the impact and compression resistance of the glass layer edge of the second part of the cover plate and reducing the risk of cracks in the glass layer of the second part of the cover plate.

[0008] The first sub-component uses a curing adhesive. This adhesive itself has adhesive properties, eliminating the need for additional connecting structures to secure the first sub-component to the glass layer of the second part of the cover plate, the first connecting layer of the second part of the cover plate, and the second sub-component. The manufacturing process is relatively simple and easy. Furthermore, the curing adhesive is fluid before curing, effectively filling the gaps between the second sub-component and the glass layer of the second part of the cover plate, eliminating air bubbles, resulting in good surface contact and strong bond between the first sub-component, the glass layer of the second part of the cover plate, the first connecting layer of the second part of the cover plate, and the second sub-component. This increases the impact and compression resistance of the glass layer edges of the second part of the cover plate, reducing the risk of cracks in the glass layer of the second part of the cover plate during assembly with the cover plate and display panel, and during use of electronic devices.

[0009] In the cover plate manufacturing process, when preparing the first compensation structure, the second sub-part is prepared first, followed by the first sub-part. The material used for the first sub-part includes a curing adhesive. Before solidification, the curing adhesive is fluid, exhibiting good wetting between the curing adhesive and the glass layer of the second part of the cover plate. Therefore, after contacting the glass layer of the second part of the cover plate, the curing adhesive easily and quickly spreads on its surface. By providing the second sub-part, an adsorption force can be generated on the curing adhesive before solidification. Consequently, the curing adhesive before solidification can be subjected to a force in the direction of the second sub-part, thereby reducing the degree of spread of the curing adhesive on the glass layer of the second part of the cover plate. This, in turn, reduces the area of ​​the curing adhesive (first sub-part) between the glass layer of the second part of the cover plate and the second connecting layer in the XY plane. Typically, the adhesive strength between the materials used in the first sub-part and the materials used in the second connecting layer, and the adhesive strength between the materials used in the first sub-part and the materials used in the glass layer of the second part of the cover plate, are both less than the adhesive strength between the materials used in the glass layer of the second part of the cover plate and the materials used in the second connecting layer. By setting a second sub-part, the contact area between the first sub-part and the bottom surface of the glass layer of the second part of the cover plate can be reduced. The bottom surface of the glass layer of the second part of the cover plate faces the second connecting layer, thereby increasing the connection area between the glass layer of the second part of the cover plate and the second connecting layer. The connection reliability between the glass layer of the second part of the cover plate and the second connecting layer is better, reducing the risk of misalignment between the glass layer of the second part of the cover plate and the second connecting layer after multiple bends.

[0010] In some possible implementations, the relationship between the thickness h1 of the first sub-part and the thickness h0 of the glass layer of the second part of the cover plate satisfies: (h0-10μm)≤h1≤(h0+50μm).

[0011] It is understandable that by controlling the thickness h1 of the first sub-part and the thickness h0 of the glass layer of the second part of the cover plate within a relatively close range, the first sub-part can better fill the first space and eliminate air bubbles.

[0012] In some possible implementations, the material used for the second sub-part includes a curing adhesive. The outer surface of the first sub-part faces away from the glass layer, and the outer surface of the first sub-part is fixedly connected to the second sub-part.

[0013] It is understandable that the materials used in the second sub-part can be the same as those used in the first sub-part.

[0014] In some possible implementations, the outer surface of the first sub-part includes a first side and a second side, which are spaced apart in a second direction. The first side connects to a first connecting layer of the second part of the cover plate. The first side is closer to the glass layer of the second part of the cover plate than the second side.

[0015] Understandably, during the fabrication of the first compensation structure, the cover plate is inverted, meaning the film layer of the second part of the cover plate is located on the side of the first connecting layer of the second part of the cover plate closer to the ground. A second sub-part is fabricated on the first connecting layer of the second part of the cover plate. The materials used for the second sub-part all include a curing adhesive. Before curing, the curing adhesive is fluid and, under the influence of gravity, the inner surface of the second sub-part will form a slope after curing. The width of the end of the second sub-part closer to the first connecting layer of the second part of the cover plate is greater than the width of the end of the second sub-part farther from the cover plate. Curing adhesive is injected between the second sub-part and the glass layer of the second part of the cover plate before curing, forming the first sub-part after curing. The outer surface of the first sub-part connects to the inner surface of the second sub-part, and the outer surface of the first sub-part can be a slope.

[0016] In some possible implementations, the materials used in the second sub-component include one or more of UV-curing adhesives, infrared-curing adhesives, and moisture-curing adhesives.

[0017] It is understandable that the second sub-component can be made of the same material as the first sub-component, or it can be made of a different material. When the second sub-component can be made of the same material as the first sub-component, it is not necessary to prepare multiple materials during the fabrication of the cover plate, thus reducing the complexity of the process.

[0018] In some possible implementations, the first compensation structure further includes a third sub-part, which is at least partially fixedly connected between the first sub-part and the first connecting layer of the second part of the cover plate.

[0019] Understandably, by providing a third sub-section, the connection force between the first sub-section and the first connecting layer of the second part of the cover plate can be increased. This reduces the likelihood of misalignment between the first sub-section and the first connecting layer of the second part of the cover plate, thus lowering the probability of air bubbles forming.

[0020] In some possible implementations, the first connecting layer of both the first sub-section and the second part of the cover plate uses acrylic materials. The third sub-section uses one or more of silane coupling agents, resins, and low-temperature inks.

[0021] Understandably, the third sub-part can be a surface modifier used to improve the interfacial adhesion between the first sub-part and the first connecting layer of the second part of the cover plate.

[0022] In some possible implementations, a portion of the third sub-part is fixedly connected between the first sub-part and the first connecting layer of the second part of the cover plate, and a portion is fixedly connected between the second sub-part and the first connecting layer of the second part of the cover plate.

[0023] It is understandable that by setting a portion of the third sub-part between the second sub-part and the first connecting layer of the second part of the cover plate, and by using the third sub-part to increase the connection force between the second sub-part and the first connecting layer of the second part of the cover plate, the connection reliability between the second sub-part and the first connecting layer of the second part of the cover plate can be improved, and misalignment is less likely to occur between the second sub-part and the first connecting layer of the second part of the cover plate, thus reducing the probability of bubble formation.

[0024] In some possible implementations, along the thickness direction of the cover plate, the projection of the third sub-part onto the first connecting layer of the second part of the cover plate and the projection of the glass layer of the second part of the cover plate onto the first connecting layer of the second part of the cover plate are staggered.

[0025] It is understandable that when the third sub-part is manufactured using inkjet or printing processes, the projection of the third sub-part on the first connecting layer of the second part of the cover plate and the projection of the glass layer of the second part of the cover plate on the first connecting layer of the second part of the cover plate are staggered, making the manufacturing process easier.

[0026] In some possible implementations, the thickness of the third sub-part is greater than or equal to 100 nm and less than or equal to 5 μm.

[0027] It is understandable that the thickness of the third sub-part is within a suitable range to avoid the third sub-part being too thick or too thin, which would affect the connection between the third sub-part and the first connecting layer of the second part of the cover plate.

[0028] In some possible implementations, the elastic modulus of the material used in the second sub-component is greater than the energy storage modulus of the material used in the first sub-component.

[0029] It is understandable that, compared to the technical solution where the second sub-part and the first sub-part use the same material, in this embodiment, the elastic modulus of the second sub-part can be greater than the energy storage modulus of the first sub-part, and thus the elastic modulus of the first compensation structure is larger, which can further improve the impact resistance and compression resistance of the edge of the glass layer of the second part of the cover plate.

[0030] In some possible implementations, the materials used in the second sub-section include one or more of PET film, TPU film, CPI film, and optically transparent adhesive.

[0031] In some possible implementations, the first side of the glass layer of the second part of the cover plate includes a first inclined surface, the first inclined surface connects to the first connecting layer of the second part of the cover plate, and the first inclined surface and the first connecting layer of the second part of the cover plate are set at an acute angle, and a portion of the first sub-part is fixedly connected between the first inclined surface and the first connecting layer of the second part of the cover plate.

[0032] Understandably, the edge of the second part of the cover glass can be chamfered, i.e., the first chamfer. By setting the chamfer, problems such as edge chipping and micro-cracks that occur at the edge of the second part of the cover glass during CNC machining or cutting can be repaired, reducing the risk of cracks in the second part of the cover glass after repeated bending.

[0033] In some possible implementations, the connection length L of the glass layers of the first sub-part and the second part of the cover plate in the third direction is greater than or equal to 0 μm and less than or equal to 1000 μm. The projection of the first sub-part onto the first connecting layer of the second part of the cover plate along the thickness direction is called the first projection, and the projection of the glass layer of the second part of the cover plate onto the first connecting layer of the second part of the cover plate along the thickness direction is called the second projection. The overlap length of the first and second projections in the third direction is the connection width L of the glass layers of the first sub-part and the second part of the cover plate. The third direction is different from both the first and second directions.

[0034] Understandably, the connection width L between the first sub-part and the second part of the cover plate's glass layer is relatively small, and the connection area of ​​the bottom surface of the glass layer between the first sub-part and the second part of the cover plate is also relatively small. When the cover plate is fixedly connected to the display panel via the second connecting layer, the bottom surface of the glass layer of the second part of the cover plate faces the second connecting layer. This results in a larger connection area between the glass layer of the second part of the cover plate and the second connecting layer, leading to better connection reliability and reducing the risk of misalignment and air bubbles between the glass layer of the second part of the cover plate and the second connecting layer after multiple bends.

[0035] In some possible implementations, the first sub-part adopts a material and the first connecting layer of the second part of the cover plate adopts a 180° peel force between the materials, which is F1. The glass layer of the second part of the cover plate adopts a material and the first connecting layer of the second part of the cover plate adopts a 180° peel force between the materials, which is F2. F1 and F2 satisfy the relationship: F1 / F2≥0.2.

[0036] It is understandable that the smaller the difference between F1 and F2, the closer the unit area connection force between the first sub-part and the first connecting layer of the second part of the cover plate is to the unit area connection force between the glass layer of the second part of the cover plate and the first connecting layer of the second part of the cover plate. The unit area connection force between the first sub-part and the first connecting layer of the second part of the cover plate is larger, which can better adapt to the stress of the bending area of ​​the cover plate (the second part of the cover plate).

[0037] In some possible implementations, the energy storage modulus of the material used in the first sub-component is greater than or equal to 10 kPa and less than or equal to 100 MPa at room temperature.

[0038] It is understandable that the storage modulus describes the energy stored in a viscoelastic material during elastic deformation. The storage modulus of the material used in the first sub-section is greater than or equal to 10 kPa and less than or equal to 100 MPa. After the cover plate has been bent multiple times, the first sub-section still has good resilience, which can better adjust the stress in the bending area of ​​the cover plate (the second part of the cover plate).

[0039] In some possible implementations, at room temperature, the 180° peel force between the material used in the first sub-part and the material used in the first connecting layer of the second part of the cover plate is greater than or equal to 1 N / cm and less than or equal to 16 N / cm.

[0040] It is understandable that the greater the 180° peel force between two materials, the greater the adhesive force between them. The 180° peel force between the material used in the first sub-part and the material used in the first connecting layer of the second part of the cover plate can be greater than or equal to 1 N / cm and less than or equal to 16 N / cm, which makes the connection between the first sub-part and the first connecting layer of the second part of the cover plate more reliable.

[0041] In some possible implementations, the creep recovery rate of the material used in the first sub-component is greater than or equal to 60% and less than or equal to 99% at room temperature.

[0042] Understandably, the higher the creep recovery rate of the material used in the first sub-component, the better its ability to return to its original shape after deformation. After the cover plate has undergone multiple bends, the first sub-component exhibits good springback after deformation, indicating good bending resistance.

[0043] In some possible implementations, the second edge of the glass layer of the second portion of the cover plate is located inside the second edge of the first connecting layer of the second portion of the cover plate. The second edge of the glass layer of the second portion of the cover plate and the first connecting layer of the second portion of the cover plate enclose a second space, and the first edge and the second edge are arranged upward along a third direction. The cover plate also includes a second compensation structure, which is at least partially located within the second space and is fixedly connected to the first connecting layer of the second portion of the cover plate. The glass layer of the second portion of the cover plate is located between the first compensation structure and the second compensation structure.

[0044] Understandably, the second compensation structure can be used to eliminate air bubbles in the second space of the cover plate, reduce the risk of misalignment between the second edge of the first connecting layer of the second part of the cover plate and the second connecting layer of the second part of the cover plate, and reduce the generation of air bubbles. Furthermore, the second compensation structure can also regulate the stress during bending, increase the impact and extrusion resistance of the second edge of the glass layer of the second part of the cover plate, and reduce the risk of cracks forming at the second edge of the glass layer of the second part of the cover plate during assembly of the cover plate and display panel, and during use of electronic devices.

[0045] In some possible implementations, a first compensation structure is disposed around the glass layer of the cover plate. The first compensation structure may be located partly in a first space, partly in the space enclosed by the edge of the glass layer of the first portion of the cover plate and the first connecting layer of the first portion of the cover plate, and partly in the space enclosed by the edge of the glass layer of the third portion of the cover plate and the first connecting layer of the third portion of the cover plate.

[0046] This allows for further filling of the edge space enclosed by the glass layers in the parts of the cover plate other than the second part and the first connecting layer, eliminating air bubbles; it also compensates for the step difference caused by the inward shrinkage of the glass layers in the parts of the cover plate other than the second part, further reducing the risk of misalignment and air bubbles between the first connecting layer, the first compensation structure, and the second connecting layer; and it further increases the impact and compression resistance of the edges of the glass layers in the parts of the cover plate other than the second part, reducing the risk of cracks in the glass layers.

[0047] Secondly, embodiments of this application provide a display screen. The display screen includes a display panel, a second connecting layer, and a cover plate, with the second connecting layer connecting the display panel and the cover plate. A glass layer and a first compensation structure of a second portion of the cover plate are both connected between the first and second connecting layers of the second portion of the cover plate.

[0048] Understandably, the first compensation structure can be used to fill the edge space of the glass layer in the bending area of ​​the cover plate, eliminating initial air bubbles during bonding; it can also be used to prevent deformation caused by direct contact between the first and second connecting layers in the bending area of ​​the cover plate. At the interface between the first connecting layer and the first compensation structure in the bending area of ​​the cover plate, air bubbles are less likely to form due to misalignment after multiple bends. By reducing air bubbles through the first compensation structure, air and moisture are less likely to corrode the display panel, resulting in better display reliability. The first compensation structure can also be used to regulate stress during the bending process, increasing the impact and extrusion resistance of the glass layer edges, reducing the risk of cracks in the glass layer during the assembly of the cover plate and display panel, further enhancing display reliability.

[0049] Thirdly, embodiments of this application provide an electronic device. The electronic device includes a first housing, a second housing, a folding mechanism, and a display screen. The folding mechanism is connected between the first housing and the second housing, and the first housing and the second housing are unfolded or folded relative to each other via the folding mechanism. A portion of the display screen is fixed to the first housing, a portion is fixed to the second housing, and a portion is fixed to the folding mechanism.

[0050] Understandably, displays offer better reliability, provide a better user experience when using electronic devices, and extend the lifespan of those devices. Attached Figure Description

[0051] To illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0052] Figure 1 is a schematic diagram of the electronic device provided in the embodiment of this application in the open state;

[0053] Figure 2 is a schematic diagram of one embodiment of the electronic device shown in Figure 1 in a closed state;

[0054] Figure 3 is an exploded view of one embodiment of the electronic device shown in Figure 1;

[0055] Figure 4 is a partial assembly diagram of one embodiment of the structure shown in Figure 3;

[0056] Figure 5 is an exploded view of one embodiment of the display screen shown in Figure 4;

[0057] Figure 6 is a cross-sectional view of one embodiment of the display screen shown in Figure 4 at section line AA;

[0058] Figure 7 is a cross-sectional view of one embodiment of the display screen shown in Figure 4 at section line BB;

[0059] Figure 8 is a schematic diagram of one embodiment of the cover plate shown in Figure 5 from another angle;

[0060] Figure 9 is a cross-sectional view of another embodiment of the display screen shown in Figure 4 at section line BB;

[0061] Figure 10 is a cross-sectional view of another embodiment of the display screen shown in Figure 4 at section line BB;

[0062] Figure 11 is a cross-sectional view of one embodiment of the display screen shown in Figure 4 at section line CC;

[0063] Figure 12 is a cross-sectional view of another embodiment of the display screen shown in Figure 4 at section line BB;

[0064] Figure 13 is a cross-sectional view of another embodiment of the display screen shown in Figure 4 at section line BB;

[0065] Figure 14 is a schematic diagram of another embodiment of the structure shown in Figure 8;

[0066] Figure 15 is a schematic diagram of another embodiment of the structure shown in Figure 8;

[0067] Figure 16 is a cross-sectional view of another embodiment of the display screen shown in Figure 4 at section line BB. Detailed Implementation

[0068] The embodiments of this application are described below with reference to the accompanying drawings. The embodiments described herein with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0069] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. It should be understood that in this application, "electrical connection" can be understood as components physically contacting and conducting electricity; it can also be understood as a form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship. For example, A connecting to B or A being connected to B can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate.

[0070] Furthermore, the term "fixed" in this document should be interpreted broadly. For example, "fixed" can mean direct fixing or indirect fixing through an intermediate medium. "Fixed" refers to connections where the relative positional relationship remains unchanged after connection. The directional terms used in the embodiments of this application, such as "upper" and "lower," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to two or more.

[0071] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0072] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0073] Furthermore, the limitations on relative positional relationships mentioned in the embodiments of this application, such as parallel, perpendicular, and aligned, are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallelism, perpendicularity, and alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0074] The embodiments of this application are described below with reference to the accompanying drawings.

[0075] Figure 1 is a schematic diagram of the electronic device 1000 provided in the embodiment of this application in the open state.

[0076] The electronic device 1000 can be a foldable mobile phone, a foldable tablet computer, a foldable personal computer, a foldable laptop computer, a foldable in-vehicle device, or a foldable wearable device. The electronic device 1000 in the embodiment shown in Figure 1 is illustrated using a foldable mobile phone as an example. For ease of description, as shown in Figure 1, the bending axis direction of the electronic device 1000 is defined as the X-axis direction. The thickness direction of the electronic device 1000 is defined as the Z-axis direction. The Y-axis direction is perpendicular to both the X-axis and Z-axis directions. In other embodiments, the coordinate system can be flexibly set according to other requirements.

[0077] Figure 2 is a schematic diagram of one embodiment of the electronic device 1000 shown in Figure 1 in a closed state. Figure 3 is an exploded schematic diagram of one embodiment of the electronic device 1000 shown in Figure 1. Figure 4 is a partial assembly schematic diagram of one embodiment of the structure shown in Figure 3.

[0078] As shown in Figures 1 to 4, the electronic device 1000 includes a display screen 100, a housing 200, and a folding mechanism 300. The housing 200 includes a first housing 210 and a second housing 220. The folding mechanism 300 connects the first housing 210 and the second housing 220, allowing the first housing 210 and the second housing 220 to be unfolded or folded relative to each other, thus enabling the first housing 210 and the second housing 220 to switch between a closed state and an open state. Figure 1 illustrates the electronic device 1000 in the open state. Figure 2 illustrates the electronic device 1000 in the closed state.

[0079] The display screen 100 can be used to display images and videos, etc. The display screen 100 can be mounted on the housing 200. Exemplarily, the display screen 100 may include a first part 1001, a second part 1002, and a third part 1003 (distinguished by dashed lines in Figures 1 to 3). The second part 1002 of the display screen 100 is connected between the first part 1001 and the third part 1003 of the display screen 100. The second part 1002 of the display screen 100 is bendable. The first part 1001 of the display screen 100 is fixed to the first housing 210, the second part 1002 of the display screen 100 is fixed to the folding mechanism 300, and the third part 1003 of the display screen 100 is fixed to the second housing 220. Thus, when the first housing 210 and the second housing 220 are closed and opened by the folding mechanism 300, the second part 1002 of the display screen 100 can bend. The first part 1001 and the third part 1003 of the display screen 100 overlap each other in the Z-axis direction.

[0080] When the electronic device 1000 is in the open state, the first part 1001, the second part 1002, and the third part 1003 of the display screen 100 are approximately 180° apart (slight deviations are allowed, such as 177° or 182°). At this time, the display screen 100 has a continuous large display area, meaning it can achieve large-screen display, providing a better user experience. When the electronic device 1000 is in the closed state, the display screens 100 fold together. Specifically, the second part 1002 of the display screen 100 bends. The first part 1001 and the third part 1003 of the display screen 100 overlap each other in the Z-axis direction. At this time, the electronic device 1000 has a smaller planar size, making it easier for users to carry and store.

[0081] Furthermore, Figure 2 illustrates that when the electronic device 1000 is in a closed state, the first portion 1001 and the third portion 1003 of the display screen 100 can be located between the first housing 210 and the second housing 220, meaning the display screen 100 can fold inward. In other embodiments, when the electronic device 1000 is in a closed state, the first housing 210 and the second housing 220 can also be located between the first portion 1001 and the third portion 1003 of the display screen 100, meaning the display screen 100 can fold outward. Specific embodiments are not limited in this case.

[0082] Furthermore, Figures 1 and 2 both illustrate that the electronic device 1000 is folded horizontally. In other embodiments, the electronic device 1000 may also be folded vertically.

[0083] Furthermore, both Figures 1 and 2 illustrate that the electronic device 1000 can be folded once. In other embodiments, the electronic device 1000 can also be folded multiple times, and the display screen 100 may include multiple bendable portions.

[0084] In some embodiments, the electronic device 1000 may further include one or more electronic components (not shown). The electronic components may be located within the housing 200. For example, the electronic components may also be fixed to the first housing 210 or the second housing 220.

[0085] For example, electronic devices may include batteries, antennas, charging management modules, camera modules, processors, audio modules, internal memory, speakers, receivers, microphones, and sensor modules.

[0086] Figure 5 is an exploded view of one embodiment of the display screen 100 shown in Figure 4. Figure 6 is a cross-sectional view of one embodiment of the display screen 100 shown in Figure 4 at section line AA.

[0087] As shown in Figures 5 and 6, the display screen 100 may include a cover plate 10, a second connecting layer 20, and a display panel 30 stacked in the thickness direction of the display screen 100. The display panel 30 can be used to display images. The cover plate 10 is used to protect the display panel 30. The cover plate 10 can be fixed to the display panel 30 by the second connecting layer 20.

[0088] In some embodiments, the display panel 30 may be a flexible display screen. For example, the display panel 30 may be an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a mini organic light-emitting diode (MLED) display panel, a micro organic light-emitting diode (MOLED) display panel, or a quantum dot light-emitting diode (QLED) display panel.

[0089] In some embodiments, the display panel 30 includes a display surface 301 and a non-display surface 302. The display surface 301 and the non-display surface 302 are disposed opposite to each other. The display surface 301 of the display screen 100 refers to the side of the display screen 100 where an image can be displayed when the user is using the electronic device 1000 normally. The display surface 301 faces the user, and the non-display surface 302 faces the interior of the electronic device 1000.

[0090] For example, the display panel 30 may include a first portion 303, a second portion 304, and a third portion 305 connected sequentially. The second portion 304 of the display panel 30 is connected between the first portion 303 and the third portion 305 of the display panel 30. For example, FIG5 illustrates the arrangement of the first portion 303, the second portion 304, and the third portion 305 of the display panel 30 in the Y-axis direction. The second portion 304 of the display panel 30 can be deformed. When the electronic device 1000 is in the open state, the first portion 303, the second portion 304, and the third portion 305 of the display panel 30 are approximately 180° apart (slight deviations are allowed, such as 177° or 182°). When the electronic device 1000 is in the closed state, the second portion 304 of the display panel 30 bends, and the first portion 303 and the third portion 305 of the display panel 30 can overlap each other in the Z-axis direction.

[0091] In some embodiments, the cover plate 10 may include a first portion 101, a second portion 102, and a third portion 103 connected sequentially in a first direction (distinguished by dashed lines in Figures 5 and 6). The second portion 102 of the cover plate 10 is connected between the first portion 101 and the third portion 103 of the cover plate 10. For example, Figure 5 illustrates the arrangement of the first portion 101, the second portion 102, and the third portion 103 of the cover plate 10 in the Y-axis direction. That is, the first direction is parallel to the Y-axis direction. The second portion 102 of the cover plate 10 is bendable. When the electronic device 1000 is in the open state, the first portion 101, the second portion 102, and the third portion 103 of the cover plate 10 are approximately 180° apart (slight deviations are allowed, such as 177° or 182°). When the electronic device 1000 is in the closed state, the second part 102 of the cover plate 10 bends, and the first part 101 and the third part 103 of the cover plate 10 can overlap each other in the Z-axis direction and face each other.

[0092] In some embodiments, the second connecting layer 20 may be located between the cover plate 10 and the display panel 30. The cover plate 10 and the display panel 30 may be fixedly connected via the second connecting layer 20. For example, the cover plate 10 may be fixedly connected to the display surface 301 of the display panel 30 via the second connecting layer 20.

[0093] For example, the second bonding layer 20 may be an optically clear adhesive (OCA). OCA is a substrate-free, double-sided optical adhesive. OCA is typically an acrylate polymer with a storage modulus at room temperature usually between 10 kPa and 500 kPa. In other embodiments, the second bonding layer 20 may also be other types of adhesives, such as moisture-curing adhesives, UV-curing adhesives, etc.

[0094] As shown in Figures 4 to 6, the first portion 303 of the display panel 30, the first portion 101 of the cover plate 10, and a portion of the second connecting layer 20 can constitute the first portion 1001 of the display screen 100. The second portion 304 of the display panel 30, the second portion 102 of the cover plate 10, and a portion of the second connecting layer 20 can constitute the second portion 1002 of the display screen 100. The third portion 305 of the display panel 30, the third portion 103 of the cover plate 10, and a portion of the second connecting layer 20 can constitute the third portion 1003 of the display screen 100.

[0095] Figure 7 is a cross-sectional view of one embodiment of the display screen 100 shown in Figure 4 at section line BB.

[0096] As shown in Figures 6 and 7, the cover plate 10 may include a membrane layer 1, a first connecting layer 2, a glass layer 3, and a first compensation structure 4, which are sequentially stacked in a second direction. The second direction is different from the first direction. For example, the second direction is parallel to the Z-axis direction.

[0097] In some embodiments, the film layer 1 can be made of a light-transmitting material. In this way, the film layer 1 will not block the light from the display panel 30 from escaping from the display screen 100 and being received by the user. The film layer 1 can also be used to protect the glass layer 3.

[0098] In some embodiments, the material used for membrane layer 1 may include polyethylene terephthalate (PET) or colorless polyimide film (CPI). For example, when membrane layer 1 is made of PET, its elastic modulus can be in the range of 500 MPa to 5 GPa. When membrane layer 1 is made of CPI, its elastic modulus can be in the range of 1 gigapascal (GPa) to 10 GPa.

[0099] In some embodiments, the film layer 1 can be fixedly connected to the glass layer 3 via the first connecting layer 2. Exemplarily, the first connecting layer 2 can be an optically clear adhesive (OCA). In this way, the first connecting layer 2 is light-transmitting, allowing light from the display panel 30 to pass through it and exit the screen. In other embodiments, the first connecting layer 2 can also be other types of adhesives, such as moisture-curing adhesives, UV-curing adhesives, etc. The material of the first connecting layer 2 can be the same as or different from the material of the second connecting layer 20.

[0100] For example, the first bonding layer 2 may include a first adhesive surface 21, a peripheral side surface 22, and a second adhesive surface 23. The first adhesive surface 21 and the second adhesive surface 23 are disposed opposite to each other. The peripheral side surface 22 of the first bonding layer 2 is connected between the first adhesive surface 21 and the second adhesive surface 23. The first adhesive surface 21 can be fixedly connected to the film layer 1. The second adhesive surface 23 can be fixedly connected to the glass layer 3.

[0101] In some embodiments, the glass layer 3 can be used to protect the display panel 30. Exemplarily, the glass layer 3 can be made of ultra-thin glass (UTG). This allows for a thinner glass layer 3 with better strength. Furthermore, ultra-thin glass has better bendability. For example, it can be bent 200,000 times with a bending radius R of 1.5 millimeters (mm).

[0102] In some embodiments, when the glass layer 3 is made of ultrathin glass, the thickness h0 of the glass layer 3 can be in the range of 10 micrometers (μm) to 200 μm. For example, the thickness of the glass layer 3 can be 10 μm, 20 μm, 30 μm, 50 μm, 100 μm, 150 μm, or 200 μm.

[0103] In some embodiments, the glass layer 3 may include a top surface 31, a bottom surface 32, and a peripheral surface 33. The top surface 31 and the bottom surface 32 are disposed opposite to each other. The peripheral surface 33 is connected between the top surface 31 and the bottom surface 32. The top surface 31 of the glass layer 3 may be fixedly connected to the first connecting layer 2, and the bottom surface 32 may be fixedly connected to the second connecting layer 20. Exemplarily, the top surface 31 of the glass layer 3 may be fixedly connected to the second adhesive surface 23 of the first connecting layer 2.

[0104] Figure 8 is a schematic diagram of one embodiment of the cover plate 10 shown in Figure 5 from another angle. The dashed lines in Figure 8 indicate the positional relationship of the glass layer 3, the second connecting layer 20, and the first compensation structure 4 within the cover plate 10.

[0105] As shown in Figures 6 to 8, the glass layer 3 can be recessed inward relative to the edge of the first connecting layer 2. The projection of the peripheral side surface 33 of the glass layer 3 onto the first connecting layer 2 along the thickness direction of the cover plate 10 is located inside the peripheral side surface 22 of the first connecting layer 2 (the projection of the peripheral side surface 33 of the glass layer 3 onto the first connecting layer 2 along the thickness direction of the cover plate 10 is shown by dashed lines in Figure 8). It can be understood that the length and width dimensions of the glass layer 3 are designed to be smaller than the length and width dimensions of the second connecting layer 20 to ensure that the glass layer 3 is not damaged during the edge cutting process of the display screen 100 during its manufacturing process.

[0106] Exemplarily, the cover plate 10 may include a first region 104 and a second region 105 (as shown in Figures 6 and 8, where Figure 8 schematically distinguishes the first region 104 and the second region 105 by different filling patterns). The second region 105 surrounds the first region 104. The first region 104 may include a portion of the film layer 1, a portion of the first connecting layer 2, and the glass layer 3. The second region 105 may include another portion of the film layer 1 and another portion of the first connecting layer 2. In other words, the area of ​​the cover plate 10 covered by the glass layer 3 is the first region 104. The area of ​​the cover plate 10 not covered by the glass layer 3 is the second region 105.

[0107] It is understandable that the thickness of the first connecting layer 2, the glass layer 3, and the second connecting layer 20 in the first region 104 is H1, the thickness of the first connecting layer 2 in the first region 104 is H2, and the thickness of the second connecting layer 20 in the first region 104 is H3. The glass layer 3 does not cover the second region 105, and there is a step difference in the second region 105 (ΔH = H1 - H2 - H3), resulting in direct contact and deformation between the first connecting layer 2 and the second connecting layer 20. That is, the thickness of the first connecting layer 2 in the second region 105 is greater than the thickness H2 of the first connecting layer 2 in the first region 104; and the thickness of the second connecting layer 20 in the second region 105 is greater than the thickness H3 of the second connecting layer 20 in the first region 104.

[0108] As shown in Figures 6 and 8, the glass layer 3 may include a first portion 34, a second portion 35, and a third portion 36 connected sequentially in a first direction (schematically distinguished by dashed lines in Figure 6). For example, the accompanying drawings of this embodiment illustrate the first direction as parallel to the Y-axis. The second portion 35 of the glass layer 3 is bendable. When the electronic device 1000 is in the open state, the first portion 34, the second portion 35, and the third portion 36 of the glass layer 3 are approximately 180° apart (slight deviations are allowed, such as 177° or 182°). When the electronic device 1000 is in the closed state, the second portion 35 of the glass layer 3 bends, and the first portion 34 and the third portion 36 of the glass layer 3 may overlap each other in the Z-axis direction.

[0109] It is understood that the first portion 34 of the glass layer 3 may be a part of the first portion 101 of the cover plate 10. The second portion 35 of the glass layer 3 may be a part of the second portion 102 of the cover plate 10. The third portion 36 of the glass layer 3 may be a part of the third portion 103 of the cover plate 10.

[0110] In some embodiments, the film layer 1 may include a first portion 11, a second portion 12, and a third portion 13 connected sequentially in a first direction (schematically distinguished by dashed lines in FIG. 6). For example, the accompanying drawings of this application embodiment illustrate the first direction being parallel to the Y-axis direction. The second portion 12 of the film layer 1 is bendable.

[0111] In some embodiments, the first connecting layer 2 may include a first portion 24, a second portion 25, and a third portion 26 connected sequentially in a first direction (schematically distinguished by dashed lines in FIG. 6). For example, the accompanying drawings of this application embodiment illustrate the first direction as parallel to the Y-axis direction. The second portion 25 of the first connecting layer 2 is bendable.

[0112] As shown in Figures 6 to 8, a portion of film layer 1, a portion of first connecting layer 2, and a first portion 34 of glass layer 3 can constitute the first portion 101 of cover plate 10. A portion of film layer 1, a portion of first connecting layer 2, a second portion 35 of glass layer 3, and a first compensation structure 4 can constitute the second portion 102 of cover plate 10. A portion of film layer 1, a portion of first connecting layer 2, and a third portion 36 of glass layer 3 can constitute the third portion 103 of cover plate 10. In other words, the first portion 101 of cover plate 10 can include glass layer 34 (i.e., the first portion 34 of glass layer 3), first connecting layer 24 (i.e., the first portion 24 of first connecting layer 2), and film layer 11 (i.e., the first portion 11 of film layer 1) stacked in the second direction. The second portion 102 of cover plate 10 can include glass layer 35 (i.e., the second portion 35 of glass layer 3), first connecting layer 25 (i.e., the second portion 25 of first connecting layer 2), and film layer 12 (i.e., the second portion 12 of film layer 1) stacked in the second direction. The third part 103 of the cover plate 10 may include a glass layer 36 (i.e., the third part 36 of glass layer 3), a first connecting layer 26 (i.e., the third part 26 of first connecting layer 2), and a film layer 13 (i.e., the third part 13 of film layer 1) stacked in the second direction.

[0113] It is understood that the laminated structure of the first part 101 of the cover plate 10 in the second direction and the laminated structure of the third part 103 of the cover plate 10 in the second direction are not limited to the three-layer structure described above. The first part 101 and the third part 103 of the cover plate 10 may include more or fewer layers. For example, the first part 101 of the cover plate 10 may not include the membrane layer 11.

[0114] Exemplarily, the first connecting layer 25 of the second portion 102 of the cover plate 10 includes a first edge 221 and a second edge 222 (as shown in FIG. 8). The first edge 221 and the second edge 222 are the two edges of the first connecting layer 25 of the second portion 102 of the cover plate 10 in the third direction. The first edge 221 and the second edge 222 can be arranged in the third direction. The glass layer 35 of the second portion 102 of the cover plate 10 includes a first edge 351 and a second edge 352. The first edge 351 and the second edge 352 are the two edges of the glass layer 35 of the second portion 102 of the cover plate 10 in the third direction, and the first edge 351 and the second edge 352 can be arranged in the third direction. The third direction is different from both the second direction and the first direction. The accompanying drawings of this application embodiment illustrate the third direction parallel to the X-axis as an example.

[0115] As shown in Figures 6 to 8, the first edge 351 of the glass layer 35 of the second portion 102 of the cover plate 10 can be located inside the first edge 221 of the first connecting layer 25 of the second portion 102 of the cover plate 10. The inside of the first edge 221 refers to the side of the first edge 221 closest to the center of the cover plate 10. In other words, the dimension of the glass layer 35 of the second portion 102 of the cover plate 10 in the third direction can be smaller than the dimension of the first connecting layer 25 of the second portion 102 of the cover plate 10 in the third direction. The projection of the glass layer 35 of the second portion 102 of the cover plate 10 onto the first connecting layer 25 of the second portion 102 of the cover plate 10 along the second direction (Z-axis direction) is a third projection. The third projection is located between the first edge 221 and the second edge 222 of the first connecting layer 25 of the second portion 102 of the cover plate 10. The first edge 351 of the glass layer 35 of the second portion 102 of the cover plate 10 and the first connecting layer 25 of the second portion 102 of the cover plate 10 enclose a first space Q1. The first compensation structure 4 may be at least partially located within the first space Q1 and fixedly connected to the first connecting layer 25 of the second portion 102 of the cover plate 10. Exemplarily, the first compensation structure 4 may be disposed opposite to the glass layer 35 of the second portion 102 of the cover plate 10 in a third-order orientation. The first compensation structure 4 may be fixedly connected to the second adhesive surface 23 of the first connecting layer 2. The first edge 351 of the second portion 35 of the glass layer 3 may enclose the first space Q1 with the second adhesive surface 23 of the second portion 102 of the cover plate 10. Exemplarily, when the cover plate 10 is fixedly connected to the display panel 30 via the second connecting layer 20, the glass layer 35 of the second portion 102 of the cover plate 10 may be connected between the first connecting layer 25 and the second connecting layer 20 of the second portion 102 of the cover plate 10, and the first compensation structure 4 may be connected between the first connecting layer 25 and the second connecting layer 20 of the second portion 102 of the cover plate 10.

[0116] Understandably, in traditional technical solutions, the cover plate 10 does not have a first compensation structure 4. Due to the inward shrinkage of the glass layer 3, a step difference exists between the second region 105 and the first region 104 of the cover plate 10. When the cover plate 10 is fixedly connected to the display panel 30 via the second connecting layer 20, the first connecting layer 2 and the second connecting layer 20 of the second region 105 are in direct contact. On one hand, due to the step difference, after the first connecting layer 2 adheres to the second connecting layer 20, trapped air bubbles may occur between the first connecting layer 2, the second connecting layer 20, and the peripheral side surface 33 of the glass layer 3. After the cover plate 10 undergoes multiple bends, these trapped air bubbles may enter the display area of ​​the display panel 30, causing abnormal display on the screen 100. On the other hand, after the first connecting layer 2 and the second connecting layer 20 of the second region 105 deform due to direct contact, the connection reliability of the first connecting layer 2 and the second connecting layer 20 decreases. After repeated opening and closing of the electronic device 1000, connection failure and holes are likely to occur between the first connecting layer 2 and the second connecting layer 20. External air and moisture can penetrate into the display screen 100 through the holes between the first connecting layer 2 and the second connecting layer 20 (from an external perspective, the holes can be considered as air bubbles), ultimately causing the display area of ​​the display panel 30 to malfunction and the display screen 100 to display abnormally. In the axial region of the display screen 100 (that is, the area that deforms and bends when the electronic device 1000 is closed—the second part 1002 of the display screen 100), the second part 102 of the cover plate 10 needs to undergo multiple bends. The first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10 are more prone to connection failure than other parts, resulting in misalignment and holes. External air and moisture can more easily penetrate through the holes between the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10, ultimately causing the display area of ​​the display panel 30 to malfunction and the display screen 100 to display abnormally. Furthermore, since there is no support around the glass layer 3, cracks are easily generated around the glass layer 3 during the assembly of the display screen 100 or the use of the electronic device 1000. Moisture can enter the interior of the display screen 100 along the cracks in the glass layer 3, causing abnormal display of the display screen 100.

[0117] Compared to the solution without the first compensation structure 4, in the technical solution of this application, the second region 105 of the second part 102 of the cover plate 10 may include a portion of the film layer 1, a portion of the first connecting layer 2 and the first compensation structure 4 in the thickness direction. A first compensation structure 4 is provided in the bending area of ​​the cover plate 10 (i.e., the second part 102 of the cover plate 10). The first compensation structure 4 can be used to fill the first space Q1 at the edge of the glass layer 3, make up for the step difference caused by the inward shrinkage of the glass layer 3, and eliminate the initial air bubbles (enclosed air bubbles). On the other hand, the first compensation structure 4 can also be used to compensate for the step difference caused by the inward shrinkage of the second part 35 of the glass layer 3. The first compensation structure 4 can be fixedly connected between the first connecting layer 2 and the second connecting layer 20 to avoid direct contact and deformation of the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10. This can reduce the stress and strain of the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10. At the connection interface of the first connecting layer 25, the first compensation structure 4 and the second connecting layer 20 of the second part 102 of the cover plate 10, it is not easy for air and water vapor to cause misalignment and generate air bubbles. Air and water vapor are not easily corroded by the display panel of the display screen 100, the display screen 100 has better display reliability, and the electronic device 1000 has a longer service life. Furthermore, the first compensation structure 4 can also be used to regulate the stress during the bending process, increase the impact and extrusion resistance of the glass layer 3 edge, and reduce the risk of cracks in the glass layer 3 during the assembly of the cover plate 10 and the display panel 30 and the use of the electronic device 1000.

[0118] Furthermore, since the first compensation structure 4 is located within the first space Q1, there is no need to increase the thickness of the cover plate 10 or increase the bending radius of the cover plate 10. Thus, the folding thickness of the electronic device 1000 will not increase.

[0119] It is understood that in this embodiment, the first compensation structure 4 is only provided in the second part 102 of the cover plate 10, and is used to compensate for the step difference caused by the inward shrinkage of the glass layer 35 in the second part 102 of the cover plate 10. In other embodiments, the first compensation structure 4 may be partially provided in the second part 102 of the cover plate 10, and partially provided in the first part 101 and / or the third part 103 of the cover plate 10, and is used to compensate for the step difference caused by the inward shrinkage of the glass layer 34 in the first part 101 of the cover plate 10 and / or the glass layer 36 in the third part 103 of the cover plate 10. This will be described in detail below with reference to the accompanying drawings, and will not be repeated here.

[0120] As shown in Figure 8, the second edge 352 of the glass layer 35 of the second portion 102 of the cover plate 10 can be located inside the second edge 222 of the first connecting layer 25 of the second portion 102 of the cover plate 10. The inside of the second edge 222 refers to the side of the second edge 222 closer to the center of the cover plate 10. The glass layer 35 of the second portion 102 of the cover plate 10 and the first connecting layer 25 of the second portion 102 of the cover plate 10 enclose the second space Q2. The cover plate 10 may also include a second compensation structure 5. The second compensation structure 5 can be at least partially located within the second space Q2 and is fixedly connected to the first connecting layer 25 of the second portion 102 of the cover plate 10. In the third direction, the glass layer 35 of the second portion 102 of the cover plate 10 is located between the first compensation structure 4 and the second compensation structure 5. The structural configuration of the second compensation structure 5 can refer to the structural configuration of the first compensation structure 4. Understandably, the second compensation structure 5 can be used to eliminate air bubbles in the second space Q2 of the cover plate 10, reduce the risk of misalignment between the second edge 222 of the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10, and reduce the generation of air bubbles. In addition, the second compensation structure 5 can also regulate the stress during the bending process, increase the impact and extrusion resistance of the glass layer 3 edge, and reduce the risk of cracks in the glass layer 3 during the assembly of the cover plate 10 and the display panel 30 and the use of the electronic device 1000.

[0121] It is understood that the second compensation structure 5 may be partially or entirely located within the second space Q2. Figure 8 illustrates an example where the second compensation structure 5 is entirely located within the second space Q2. Exemplarily, a portion of the membrane layer 1, a portion of the first connecting layer 2, a portion of the glass layer 3, the first compensation structure 4, and the second compensation structure 5 can constitute the second part 102 of the cover plate 10.

[0122] It is understandable that the structure of the second compensation structure 5 can be referenced to the structure of the first compensation structure 4. The following text will use the structure of the first compensation structure 4 as an example for specific illustration.

[0123] As shown in Figures 7 and 8, the first compensation structure 4 may include a first sub-part 41 and a second sub-part 42. Both the first sub-part 41 and the second sub-part 42 may be fixedly connected to the first connecting layer 25 of the second portion 102 of the cover plate 10. The first sub-part 41 may at least partially fix the second sub-part 42 to the glass layer 35 of the second portion 102 of the cover plate 10. The first sub-part 41 may be used to fill part or all of the step difference formed by the glass layer 3. Exemplarily, the first compensation structure 4 may be fixedly connected to the first connecting layer 2 of the second portion 102 of the cover plate 10. The first sub-part 41 may be disposed opposite to the second portion 35 of the glass layer 3 in a third-order orientation.

[0124] Exemplarily, the first sub-part 41 may have a top surface 411, a bottom surface 412, an inner surface 413, and an outer surface 414. The top surface 411 and bottom surface 412 are disposed opposite to each other, and the inner surface 413 and outer surface 414 are disposed opposite to each other. The inner surface 413 and outer surface 414 are two sides of the first sub-part 41 in a third-order direction. The top surface 411 is connected to the first connecting layer 2. The bottom surface 412 is connected to the second connecting layer 20. The outer surface 414 is fixedly connected to the second sub-part 42. The inner surface 413 faces the glass layer 3.

[0125] In some embodiments, the material used for the first sub-part 41 may include a curing adhesive. For example, the first sub-part 41 may include one or more of ultraviolet curing adhesives (UV adhesives), infrared curing adhesives, and moisture curing adhesives. A curing adhesive, also known as a binder, is a bonding material that can cure from a liquid state into a strong gel-like substance upon contact with air or under specific conditions. It is understood that the first sub-part 41 may be a single-component curing adhesive; it may be a mixture of several curing adhesives; or it may be a mixture of curing adhesive and other dopants to give the first sub-part 41 more physical properties. For example, materials that accelerate curing may be added to the curing adhesive to speed up the fabrication and molding of the first sub-part 41. In some embodiments, the fabrication of the first sub-part 41 may be completed in two stages. This allows for better control of the width of the first sub-part 41. Exemplarily, the first sub-part 41 may be fabricated using a dispensing process or an inkjet printing process.

[0126] It is understandable that the material used for the first sub-part 41 may include a curing adhesive. The curing adhesive has adhesive properties, thus eliminating the need for additional connecting structures for the fixed connection between the first sub-part 41 and the first connecting layer 25 and the second sub-part 42 of the second part 102 of the cover plate 10. The manufacturing process is relatively simple and easy. Furthermore, the adhesive has fluidity before curing, which can effectively fill the gap between the second sub-part 42 and the glass layer 3, eliminating trapped air bubbles. Therefore, the surface contact between the first sub-part 41 and the glass layer 3, the first connecting layer 2, and the second sub-part 42 is good, resulting in superior connection strength.

[0127] In some embodiments, the first sub-part 41 and the second sub-part 42 can be manufactured in two processes, with the second sub-part 42 being manufactured first. It is understood that during the manufacturing process of the cover plate 10, when manufacturing the first compensation structure 4, the second sub-part 42 is manufactured first, followed by the first sub-part 41. The first sub-part 41 is cured with adhesive. The adhesive has good wettability with the glass layer 3, and the adhesive spreads easily and quickly on the surface of the glass layer 3 after contact. The second sub-part 42 can generate an adsorption force on the adhesive, thus the adhesive is subjected to a force in the direction of the second sub-part 42, thereby reducing the degree of spread of the adhesive on the glass layer 3. After the adhesive cures, the first sub-part 41 is formed. By providing the second sub-part 42, the area of ​​the first sub-part 41 in the XY plane between the glass layer 3 and the second connecting layer 20 can be reduced. Furthermore, generally, the adhesive force between the material of the first sub-part 41 and the material of the second connecting layer 20 is less than the adhesive force between the material of the glass layer 3 and the material of the second connecting layer 20. By setting the second sub-part 42, the contact area between the first sub-part 41 and the bottom surface 32 of the glass layer 3 can be reduced, the connection area between the glass layer 3 and the second connecting layer 20 can be increased, the connection reliability between the glass layer 3 and the second connecting layer 20 can be improved, and the risk of misalignment between the glass layer 3 and the second connecting layer 20 after multiple bends of the cover plate 10 can be reduced.

[0128] For example, the 180° peel force between the material used in the first sub-part 41 and the material used in the first connecting layer 25 of the second part 102 of the cover plate 10 can be greater than or equal to 2 N / cm and less than 6 N / cm. The 180° peel force between the material used in the glass layer 35 of the second part 102 of the cover plate 10 and the material used in the second connecting layer 20 can be greater than or equal to 6 N / cm and less than or equal to 10 N / cm.

[0129] In some embodiments, the first sub-part 41 may be partially fixedly connected between the bottom surface 32 of the glass layer 3 and the second connecting layer 20. For example, the first sub-part 41 may be partially fixedly connected between the glass layer 35 and the second connecting layer 20 of the second portion 102 of the cover plate 10. It is understood that during the fabrication process of the cover plate 10, the film layer 1, the first connecting layer 2, and the glass layer 3 are assembled first, and then the first compensation structure 4 is fabricated. The material used for the first sub-part 41 may include a curing adhesive, which is fluid before curing. The curing adhesive has good wettability with the glass layer 3, and before curing, the curing adhesive may flow along the surface of the glass layer 3, and some of the curing adhesive may flow onto the bottom surface 32 of the glass layer 3. Therefore, after the curing adhesive has cured, the cover plate 10 and the display panel 30 are fixedly connected by the second connecting layer 20, and the first sub-part 41 may be partially located between the bottom surface 32 of the glass layer 3 and the second connecting layer 20.

[0130] In some embodiments, the connection width L between the first sub-part 41 and the glass layer 35 of the second portion 102 of the cover plate 10 in the third direction is greater than or equal to 0 μm and less than or equal to 1000 μm. For example, the connection width L between the first sub-part 41 and the glass layer 35 of the second portion 102 of the cover plate 10 can be greater than or equal to 100 μm and less than or equal to 300 μm. The projection of the first sub-part 41 onto the first connecting layer 2 along the thickness direction of the cover plate 10 is the first projection, and the projection of the glass layer 35 of the second portion 102 of the cover plate 10 onto the first connecting layer 2 along the thickness direction of the cover plate 10 is the second projection. The overlap length of the first projection and the second projection along the third direction is the connection width L of the glass layer 35 of the second portion 102 of the cover plate 10.

[0131] It is understandable that the connection width L between the first sub-part 41 and the glass layer 35 of the second part 102 of the cover plate 10 is small, the connection area between the first sub-part 41 and the bottom surface 32 of the glass layer 3 is small, the connection area between the glass layer 3 and the second connecting layer 20 is large, the connection reliability between the glass layer 3 and the second connecting layer 20 is better, and the risk of misalignment between the glass layer 3 and the second connecting layer 20 after multiple bends of the cover plate 10 is reduced.

[0132] In some embodiments, the first sub-part 41 may be connected to the peripheral side surface 33 of the glass layer 3. This allows the first sub-part 41 to better fill the first space Q1, which is beneficial for eliminating air bubbles. For example, the first sub-part 41 may be connected to the side surface of the glass layer 35 of the second portion 102 of the cover plate 10.

[0133] In some embodiments, the relationship between the thickness h1 of the first sub-part 41 and the thickness h0 of the glass layer 35 of the second portion 102 of the cover plate 10 satisfies: (h0-10μm)≤h1≤(h0+50μm). For example, when h0=30μm, the thickness h1 of the first sub-part 41 can be greater than or equal to 20μm and less than or equal to 80μm. It is understood that by controlling the thickness h1 of the first sub-part 41 and the thickness h0 of the glass layer 35 of the second portion 102 of the cover plate 10 within a relatively close range, the first sub-part 41 can better accommodate the first space Q1.

[0134] In some implementations, the width k1 of the first sub-part 41 satisfies: 50μm≤k1≤3000μm.

[0135] In some embodiments, the length L1 of the first sub-part 41 can be determined based on the length L0 of the glass layer 35 of the second portion 102 of the cover plate 10. L1 can be greater than or equal to L0. For example, the length L1 of the first sub-part 41 can satisfy: 5mm ≤ L1 ≤ 30mm.

[0136] Understandably, the first sub-part 41 is located in the bending area of ​​the cover plate 10 (i.e., the second part 102 of the cover plate 10), and simultaneously connects the first connecting layer 25, the second connecting layer 20, the second sub-part 42, and the glass layer 35 of the second part 102 of the cover plate 10. When selecting the material for the first sub-part 41, materials with good bending resistance and good adhesion can be chosen. This allows the first sub-part 41 to better adapt to the need for multiple bending in the bending area of ​​the cover plate 10, reducing the risk of failure after multiple bending. The characteristics of the material used in the first sub-part 41 are illustrated below.

[0137] In some embodiments, at room temperature, the storage modulus of the material used in the first sub-section 41 is greater than or equal to 10 kilopascals (kPa) and less than or equal to 100 megapascals (MPa). The storage modulus describes the energy stored in a viscoelastic material during elastic deformation. Since the storage modulus of the material used in the first sub-section 41 is greater than or equal to 10 kPa and less than or equal to 100 MPa, the first sub-section 41 still exhibits good resilience after the cover plate 10 has undergone multiple bends, thus allowing for better stress regulation in the bending area. Exemplarily, the method for measuring the storage modulus of the first material can refer to standard ASTM E2254-2011.

[0138] In some embodiments, at room temperature, the creep recovery rate of the material used in the first sub-part 41 can be greater than or equal to 60% and less than or equal to 99%. It is understood that the higher the creep recovery rate of the material used in the first sub-part 41, the better the ability of the first sub-part 41 to return to its original shape after deformation. After the cover plate 10 has undergone multiple bends, the first sub-part 41 exhibits good springback after deformation, and its bending resistance is good. Exemplarily, the creep recovery rate of the material used in the first sub-part 41 can be measured according to standard ASTM D2990-13. The creep recovery rates of all materials mentioned herein can be referenced to standard ASTM D2990-13.

[0139] In some embodiments, at room temperature, the 180° peel force between the material used in the first sub-part 41 and the material used in the first connecting layer 25 of the second part 102 of the cover plate 10 can be greater than or equal to 1 N / cm and less than or equal to 16 N / cm. It is understood that the greater the 180° peel force between the two materials, the greater the adhesive force between them. The fact that the 180° peel force between the material used in the first sub-part 41 and the material used in the first connecting layer 25 of the second part 102 of the cover plate 10 can be greater than or equal to 1 N / cm and less than or equal to 16 N / cm improves the reliability of the connection between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10. Exemplarily, the method for measuring the 180° peel force between the material used in the first sub-part 41 and the material used in the first connecting layer 25 of the second part 102 of the cover plate 10 can refer to standard GB 2792-1998. The 180° peel strength of the materials mentioned in this article can be referenced to standard GB 2792-1998.

[0140] In some embodiments, the 180° peel force between the material used in the first sub-part 41 and the material used in the first connecting layer 2 is F1, and the 180° peel force between the material used in the glass layer 3 and the material used in the first connecting layer 2 is F2. F1 and F2 satisfy the relationship: F1 / F2≥0.2.

[0141] It is understandable that the smaller the difference between F1 and F2, the closer the unit area connection force between the first sub-part 41 and the first connecting layer 2 is to the unit area connection force between the glass layer 3 and the first connecting layer 2. The unit area connection force between the first sub-part 41 and the first connecting layer 2 is larger, which can better adapt to the stress in the bending area of ​​the cover plate 10.

[0142] In some embodiments, at room temperature, the 180° peel force between the material used in the first sub-part 41 and the material used in the second connecting layer 20 can be greater than or equal to 1 N / cm and less than or equal to 16 N / cm. This results in better connection reliability between the first sub-part 41 and the second connecting layer 20, and prevents delamination from easily occurring between the first sub-part 41 and the second connecting layer 20 after multiple bends.

[0143] In some embodiments, the curing rate of the material used in the first sub-part 41 can be greater than 95% at room temperature. This reduces surface stickiness of the first sub-part 41, facilitating subsequent assembly processes. For example, the curing rate of the material used in the first sub-part 41 can be measured according to standard GB / T 27267-2017. The curing rate measurements of all materials mentioned herein can be performed according to standard GB / T 27267-2017.

[0144] In some embodiments, the material used for the first sub-part 41 can be acrylic adhesive. It is understood that acrylic adhesive has a wide range of raw material sources, a simple preparation process, rapid curing, good transparency, good adhesion to various materials, and excellent weather resistance, water resistance, and chemical resistance. Using acrylic adhesive for the first sub-part 41 helps reduce the material cost of the cover plate 10 and improves the reliability of the connection between the first sub-part 41 and the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10.

[0145] In some embodiments, the relationship between the thickness h2 of the second sub-part 42 and the thickness h0 of the glass layer 35 of the second portion 102 of the cover plate 10 satisfies: (h0-10μm)≤h2≤(h0+50μm). For example, when the thickness h0 is 30μm, the thickness h2 of the second sub-part 42 can be greater than or equal to 20μm and less than or equal to 80μm.

[0146] Understandably, if the thickness h2 of the second sub-section 42 and the thickness h0 of the glass layer 35 of the second part 102 of the cover plate 10 are controlled within a relatively close range, the second sub-section 42 can better fill the step difference.

[0147] In some implementations, the width k2 of the second sub-part 42 satisfies: 50μm≤k2≤5000μm.

[0148] In some embodiments, the length L2 of the second sub-part 42 can be adjusted according to the length L0 of the glass layer 35 of the second portion 102 of the cover plate 10. L1 can be greater than or equal to L0. For example, the length L2 of the second sub-part 42 can satisfy: 5mm ≤ L2 ≤ 30mm.

[0149] Understandably, the second sub-part 42 is located in the bending area of ​​the cover plate 10 and simultaneously connects the first connecting layer 25, the second connecting layer 20, and the first sub-part 41 of the second part 102 of the cover plate 10. When selecting the material for the second sub-part 42, materials with good bending resistance and good adhesion can be chosen. This allows the second sub-part 42 to better adapt to the need for multiple bending in the bending area of ​​the cover plate 10, reducing the risk of failure after multiple bending. Furthermore, the second sub-part 42 does not need to contact the glass layer 35 of the second part 102 of the cover plate 10; therefore, the material selection for the second sub-part 42 has a wider range of choices compared to the first sub-part 41. The characteristics of the materials used in the second sub-part 42 are illustrated below.

[0150] In some embodiments, the material used for the second sub-part 42 may include a curable adhesive. The material used for the second sub-part 42 may be the same as that used for the first sub-part 41. This simplifies the manufacturing process and reduces manufacturing costs. For example, the second sub-part 42 can be manufactured using a dispensing process or an inkjet printing process.

[0151] In some embodiments, the material used for the second sub-part 42 may include one or more of ultraviolet-curing adhesives, infrared-curing adhesives, and moisture-curing adhesives. It is understood that the second sub-part 42 may use the same material as the first sub-part 41, or it may use a different material. For example, the second sub-part 42 may use the same material as the first sub-part 41. This eliminates the need to prepare multiple materials during the fabrication of the cover plate 10, reducing process complexity. For example, when the material used for the second sub-part 42 is a curing adhesive, the storage modulus of the material used for the second sub-part 42 can be in the range of 10 kPa to 2 GPa.

[0152] In some embodiments, the elastic modulus of the material used in the second sub-part 42 can be greater than the storage modulus of the material used in the first sub-part 41. Thus, compared to technical solutions where the second sub-part 42 and the first sub-part 41 use the same material, in this embodiment, the elastic modulus of the second sub-part 42 can be greater than the storage modulus of the first sub-part 41, resulting in a larger elastic modulus of the first compensation structure 4, which can further improve the impact and compression resistance of the edge of the glass layer 3.

[0153] For example, the materials used in the second subsection 42 may include optically clear adhesive (OCA). OCA adhesive can be a single-layer adhesive tape, a multi-layer adhesive tape, or an OCA-PET-OCA composite multi-layer tape. It is understood that the interfacial adhesion between OCA adhesive and adhesive materials is better than the interfacial adhesion between adhesive materials themselves. For example, the elastic modulus of OCA adhesive can range from 10 kPa to 1000 kPa. The test methods for the elastic modulus of the materials in the embodiments of this application can all refer to the standard ASTM D882-10.

[0154] In some embodiments, the material used for the second sub-part 42 may include a membrane material. The elastic modulus of the membrane material may be greater than that of the adhesive material. For example, the material used for the second sub-part 42 may include a silicone membrane, a CPI membrane, a PET membrane, or a thermoplastic polyurethane (TPU) membrane. Exemplarily, the elastic modulus of the TPU membrane may be in the range of 10 MPa to 100 MPa. The elastic modulus of the silicone membrane may be in the range of 100 MPa to 2 GPa. The elastic modulus of the PET membrane may be in the range of 500 MPa to 5 GPa. The elastic modulus of the CPI membrane may be in the range of 1 GPa to 10 GPa. Exemplarily, the second sub-part 42 may be fixed to the first connecting layer 2 by a bonding process.

[0155] Understandably, the interfacial adhesion between the membrane material and the adhesive material is better than the interfacial adhesion between adhesive materials. For example, the 180° peel force between the membrane material and the adhesive material can be in the range of 6 N / cm to 10 N / cm. The 180° peel force between adhesive materials can be in the range of 2 N / cm to 4 N / cm. Compared to the solution where the second sub-part 42 uses an adhesive material, when the second sub-part 42 uses a membrane material, the adhesion between the second sub-part 42 and the first connecting layer 2 and the second connecting layer 20 can be greater.

[0156] In some embodiments, when the first space Q1 is large, the material used for the second sub-part 42 may also include foam adhesive. For example, the elastic modulus of the foam adhesive can be in the range of 1000 MPa to 5000 MPa.

[0157] It is understandable that the material used in the second sub-section 42 can be set according to requirements. For example, if the first sub-section 41 uses acrylic adhesive, the second sub-section 42 can use a film material. The elastic modulus of the film material can be greater than that of the adhesive material. Compared to the option of using an adhesive material in the second sub-section 42, in this embodiment, the second sub-section 42 can further improve the edge impact and compression resistance of the glass layer 3.

[0158] Figure 9 is a cross-sectional view of another embodiment of the display screen 100 shown in Figure 4 at section line BB.

[0159] As shown in Figures 8 and 9, when both the materials used in the first sub-part 41 and the second sub-part 42 include a curing adhesive, the outer surface 414 of the first sub-part 41 can be a slope. Exemplarily, the outer surface 414 of the first sub-part 41 may include a first side 4141 and a second side 4142. The first side 4141 and the second side 4142 may be spaced apart in a second direction. The first side 4141 may be connected to the first connecting layer 25 of the second portion 102 of the cover plate 10, and the second side 4142 may be connected to the second connecting layer 20. The first side 4141 is closer to the glass layer 35 of the second portion 102 of the cover plate 10 than the second side 4142. In other words, the distance D1 from the first side 4141 to the glass layer 35 of the second portion 102 of the cover plate 10 is less than the distance D2 from the second side 4142 to the glass layer 35 of the second portion 102 of the cover plate 10.

[0160] Understandably, during the preparation of the first compensation structure 4, the cover plate 10 is inverted, meaning the membrane layer 1 is located on the side of the first connecting layer 2 closest to the ground. A second sub-part 42 is prepared on the first connecting layer 2, with the second sub-part 42 and the glass layer 35 of the second part 102 of the cover plate 10 spaced apart. The materials used for the second sub-part 42 all include a curing adhesive. Before curing, the curing adhesive is fluid and, under the influence of gravity, the inner surface of the second sub-part 42 will form a slope after curing. The width of the end of the second sub-part 42 closest to the first connecting layer 25 of the second part 102 of the cover plate 10 is greater than the width of the end of the second sub-part 42 furthest from the cover plate 10. Adhesive is injected between the second sub-part 42 and the glass layer 35 of the second part 102 of the cover plate 10, and after curing, a first sub-part 41 is formed. The outer surface 414 of the first sub-part 41 connects to the inner surface of the second sub-part 42. At this time, the distance D1 from the first side 4141 of the outer surface 414 of the first sub-part 41 to the glass layer 35 of the second part 102 of the cover plate 10 is less than the distance D2 from the second side 4142 to the glass layer 35 of the second part 102 of the cover plate 10.

[0161] Exemplarily, the glass layer 35 of the second portion 102 of the cover plate 10 may include a first side 335 and a second side 336. The first side 335 and the second side 336 may be spaced apart in a third-order upward direction. It is understood that the first side 335 may be part of the peripheral side 33 of the glass layer 3, and the second side 336 may be part of the peripheral side 33 of the glass layer 3.

[0162] In some embodiments, the edge of the glass layer 35 of the second portion 102 of the cover plate 10 may be chamfered. Exemplarily, the first side surface 335 of the glass layer 35 of the second portion 102 of the cover plate 10 may include a first inclined surface 331, a connecting surface 332, and a second inclined surface 333. The second inclined surface 333, the connecting surface 332, and the first inclined surface 331 may be arranged in a second direction. One side of the first inclined surface 331 is connected to the first connecting layer 25 of the second portion 102 of the cover plate 10, and the other side may be connected to the connecting surface 332. One side of the second inclined surface 333 may be connected to the second connecting layer 20, and the other side may be connected to the connecting surface 332. The first inclined surface 331 may face the first connecting layer 25 of the second portion 102 of the cover plate 10 and is set at an acute angle to the first connecting layer 25 of the second portion 102 of the cover plate 10. The second inclined surface 333 may face the second connecting layer 20 and is set at an acute angle to the second connecting layer 20. In this case, the glass layer 3 has two chamfers, namely a first chamfer C1 and a second chamfer C2. The first sub-part 41 may be partially located between the first inclined surface 331 and the first connecting layer 25 of the second part 102 of the cover plate 10, and partially located between the second inclined surface 333 and the second connecting layer 20.

[0163] In other embodiments, the glass layer 3 may also have only one chamfer. Exemplarily, the first side surface 335 may also include a first inclined surface 331 and a connecting surface 332. The connecting surface 332 connects the first inclined surface 331 and the second connecting layer 20. Alternatively, the first side surface 335 may also include a second inclined surface 333 and a connecting surface 332. The connecting surface 332 may connect the first connecting layer 25 and the second inclined surface 333 of the second portion 102 of the cover plate 10. This application is not limiting.

[0164] Understandably, by setting a chamfer, issues such as edge chipping and micro-cracks that occur at the edges of glass layer 3 during CNC machining or cutting can be repaired, reducing the risk of cracks forming after repeated bending. The chamfer dimensions can be designed according to the dimensions of glass layer 3.

[0165] In some embodiments, the length X of the first inclined plane 331 can be in the range of 10 μm to 100 μm. For example, 10 μm, 15 μm, 20 μm, 40 μm, 50 μm, 80 μm, 95 μm, or 100 μm. The length of the second inclined plane 333 can be set with reference to the length of the first inclined plane 331, and will not be described in detail here.

[0166] In some implementations, the height H of the connection surface 332 can be in the range of 5 μm to 20 μm. For example, 5 μm, 10 μm, 15 μm, or 20 μm.

[0167] In some embodiments, the first sub-part 41 may be partially fixed between the first inclined surface 331 and the first connecting layer 25 of the second portion 102 of the cover plate 10, and partially fixed between the second inclined surface 333 and the second connecting layer 20. Exemplarily, the first sub-part 41 may fixably connect the first inclined surface 331, the connecting surface 332, the second inclined surface 333, the first connecting layer 25 of the second portion 102 of the cover plate 10, and the second connecting layer 20. It is understood that the first sub-part 41 not only fills the space between the first connecting layer 25 and the second connecting layer 20 of the second portion 102 of the cover plate 10. When the glass layer 35 of the second portion 102 of the cover plate 10 is also chamfered, the first sub-part 41 may also be partially located within the chamfer, filling the chamfer and further filling the gap between the glass layer 35 of the second portion 102 of the cover plate 10 and the first connecting layer 25 and the second connecting layer 20 of the second portion 102 of the cover plate 10, eliminating air bubbles. Furthermore, by setting a chamfer, the contact area between the first sub-part 41 and the glass layer 35 of the second part 102 of the cover plate 10 can be increased, thereby improving the connection reliability between the first sub-part 41 and the glass layer 35 of the second part 102 of the cover plate 10.

[0168] In other embodiments, the second side 336 of the glass layer 35 of the second part 102 of the cover plate 10 may also be chamfered, and the chamfering method can refer to the chamfering method of the first side 335.

[0169] In other embodiments, the sides of the glass layer 34 of the first portion 101 of the cover plate 10 and / or the sides of the glass layer 36 of the third portion 103 of the cover plate 10 may also be chamfered. For example, the peripheral side surface 33 of the glass layer 3 of the cover plate 10 may be chamfered.

[0170] Figure 10 is a cross-sectional view of the display screen 100 shown in Figure 4 at section line BB. Figure 11 is a cross-sectional view of the display screen 100 shown in Figure 4 at section line CC. Figure 11 illustrates the structure shown in Figure 10 at section line CC on the display screen 100.

[0171] As shown in Figures 10 and 11, the first compensation structure 4 may further include a third sub-part 43. The third sub-part 43 may be at least partially fixed between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10. The third sub-part 43 can be used to increase the connection force between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10. It is understood that by providing the third sub-part 43, the connection force between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 can be increased, making it less likely for misalignment to occur between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10, thus reducing the probability of bubble formation.

[0172] In some embodiments, the third sub-part 43 may be a surface modifier to improve the interfacial adhesion between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10. For example, the material of the third sub-part 43 may include one or more of a silane coupling agent, a resin, and a low-temperature ink. Exemplarily, the third sub-part 43 may be formed by an inkjet or printing process. Exemplarily, when the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 are in direct contact, the connection force between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 is F3. When the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 are indirectly contacted through the third sub-part 43, the connection force between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 is F4, where F4 is greater than F3.

[0173] In some embodiments, the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10 may use the same type of adhesive. Exemplarily, the materials used for both the first sub-part 41 and the first connecting layer 2 may both include acrylate materials, such as acrylate adhesives. Here, "two materials of the same type" means that the main components of the two materials are the same, but their content may differ, and other non-main components may also differ. For example, acrylate adhesives refer to adhesive substances prepared by copolymerizing acrylate monomers containing hydrogen ester groups (such as ethyl methacrylate, butyl acrylate, and 2-ethylhexyl acrylate) with unsaturated olefin monomers (such as styrene, acrylonitrile, or vinyl acetate), and then adding appropriate additives. The chemical composition of different acrylate adhesives may differ slightly due to preparation processes, but they all belong to the acrylate category and are of the same type.

[0174] Under normal circumstances, the bonding force between adhesives of the same type of material (which can be characterized by 180° peel force) is relatively small. By providing the third sub-part 43, the interfacial bonding ability between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10 can be improved, thereby enhancing the bonding force between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10.

[0175] In other embodiments, the first connecting layer 25 of the first sub-part 41 and the second part 102 of the cover plate 10 can also be made of different types of materials. When the direct adhesive force between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10 cannot meet the usage requirements, a third sub-part 43 can be provided between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10 to improve the connection force between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10.

[0176] In some embodiments, when the glass layer 35 of the second portion 102 of the cover plate 10 has a chamfer, the projection of the third sub-part 43 on the first connecting layer 2 along the thickness direction of the cover plate 10 can partially overlap with the projection of the glass layer 35 of the second portion 102 of the cover plate 10 on the first connecting layer 2. That is, the third sub-part 43 can be partially located within the chamfer of the glass layer 35 of the second portion 102 of the cover plate 10. In this way, the connection area between the third sub-part 43 and the first connecting layer 25 and the first sub-part 41 of the second portion 102 of the cover plate 10 is larger, and the connection reliability between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 is better.

[0177] For example, the thickness h3 of the third sub-part 43 is greater than or equal to 100 nm and less than or equal to 5 μm.

[0178] It is understandable that the width k3 of the third sub-part 43 can be determined based on the inward dimension of the glass layer 3 and the dimension of the first sub-part 41. In some embodiments, the width k3 of the third sub-part 43 can satisfy: 50μm≤k3≤3000μm. For example, the width k3 can be 200μm, 600μm, 1000μm, 2000μm, or 3000μm. In electronic devices 1000 of different sizes, the width k3 of the third sub-part 43 can be within different ranges. In a foldable phone, the width k3 of the third sub-part 43 can satisfy: 50μm≤k3≤600μm.

[0179] In some embodiments, the length L3 of the third sub-part 43 can be adjusted according to the length L1 of the first sub-part 41. For example, the length L3 of the third sub-part 43 can satisfy: 5mm ≤ L3 ≤ 30mm.

[0180] In some embodiments, the first compensation structure 4 may further include a fourth sub-part 44. The fourth sub-part 44 may be at least partially fixed between the first sub-part 41 and the second connecting layer 20. The fourth sub-part 44 may be used to increase the connection force between the first sub-part 41 and the second connecting layer 20.

[0181] It is understandable that by setting the fourth sub-part 44, the interfacial bonding ability between the first sub-part 41 and the second connecting layer 20 can be improved, the bonding strength between the first sub-part 41 and the second connecting layer 20 can be enhanced, the mis-layering between the first sub-part 41 and the second connecting layer 20 is less likely to occur, and the probability of bubble formation is reduced.

[0182] In some embodiments, the fourth sub-part 44 may be a surface modifier used to improve the interfacial adhesion between the first sub-part 41 and the second connecting layer 20. For example, the material of the fourth sub-part 44 may include one or more of a silane coupling agent, a resin, and a low-temperature ink. It is understood that the material of the fourth sub-part 44 may be the same as or different from the material of the third sub-part 43.

[0183] In some embodiments, the first sub-part 41 and the second connecting layer 20 may use an adhesive of the same type. Exemplarily, the materials used for both the first sub-part 41 and the second connecting layer 20 may both include acrylic materials. Exemplarily, the fourth sub-part 44 may be formed by inkjet printing or other printing processes. It is understood that adhesives of the same type have relatively low bonding strength; by providing the fourth sub-part 44, the interfacial adhesion between the first sub-part 41 and the second connecting layer 20 can be improved, thereby enhancing the bond strength between the first sub-part 41 and the second connecting layer 20.

[0184] In some embodiments, when the glass layer 35 of the second portion 102 of the cover plate 10 has a chamfer, the projection of the fourth sub-part 44 onto the second connecting layer 20 along the thickness direction of the cover plate 10 can partially overlap with the projection of the glass layer 35 of the second portion 102 of the cover plate 10 onto the second connecting layer 20. That is, the fourth sub-part 44 can be partially located within the chamfer of the glass layer 35 of the second portion 102 of the cover plate 10. In this way, the connection area between the fourth sub-part 44 and the second connecting layer 20, and the first sub-part 41 is larger, and the connection reliability between the first sub-part 41 and the second connecting layer 20 is better.

[0185] For example, the thickness h4 of the fourth sub-part 44 can be greater than or equal to 100 nm and less than or equal to 5 μm.

[0186] It is understandable that the width k4 of the fourth sub-part 44 can be determined based on the inward dimension of the glass layer 35 of the second portion 102 of the cover plate 10 and the dimensions of the first sub-part 41. In some embodiments, the width k4 of the fourth sub-part 44 can satisfy: 50μm ≤ k4 ≤ 3000μm. For example, the width k4 can be 200μm, 600μm, 1000μm, 2000μm, or 3000μm. In electronic devices 1000 of different sizes, the width k4 of the fourth sub-part 44 can be within different ranges. In a foldable phone, the width k4 of the fourth sub-part 44 can satisfy: 50μm ≤ k4 ≤ 600μm.

[0187] In some embodiments, the length L4 of the fourth sub-part 44 can be adjusted according to the length L1 of the first sub-part 41. For example, the length L4 of the fourth sub-part 44 can satisfy: 5mm ≤ L4 ≤ 30mm.

[0188] Figure 12 is a cross-sectional view of the display screen 100 shown in Figure 4 at section line BB, representing another embodiment.

[0189] As shown in Figure 12, the third sub-part 43 can be partially connected between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10, and another part can be connected between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10. The third sub-part 43 can also be used to increase the connection force between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10. In this way, the connection reliability between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10 is better, and mis-layering is less likely to occur between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10, thus reducing the probability of bubble formation.

[0190] In some embodiments, the second sub-part 42 may use the same type of adhesive as the first connecting layer 25 of the second portion 102 of the cover plate 10. It is understood that, generally, the bonding strength (characterized by the 180° peel force) between adhesives of the same type is relatively low. By providing the third sub-part 43, the interfacial bonding ability between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10 can be improved, thereby enhancing the bonding strength between the first sub-part 41 and the first connecting layer 25 of the second portion 102 of the cover plate 10.

[0191] In other embodiments, the second sub-part 42 may also be made of a different type of material from the first connecting layer 25 of the second part 102 of the cover plate 10. When the direct adhesion between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10 cannot meet the usage requirements, a third sub-part 43 may be provided between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10 to improve the connection force between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10.

[0192] In some embodiments, the fourth sub-part 44 may be partially fixed between the first sub-part 41 and the second connecting layer 20, and partially fixed between the second sub-part 42 and the second connecting layer 20. The fourth sub-part 44 can also be used to increase the connection force between the second sub-part 42 and the second connecting layer 20. This improves the reliability of the connection between the second sub-part 42 and the second connecting layer 20, reduces the likelihood of misalignment between them, and lowers the probability of air bubbles forming.

[0193] In some embodiments, the second sub-part 42 may use an adhesive of the same type as the second connecting layer 20. It is understood that, generally, the bonding strength (characterized by the 180° peel force) between adhesives of the same type is relatively small. By providing the fourth sub-part 44, the interfacial bonding ability between the second sub-part 42 and the second connecting layer 20 can be improved, thereby enhancing the bonding strength between the second sub-part 42 and the second connecting layer 20.

[0194] In other embodiments, the second sub-part 42 may also use an adhesive of a different type than that used for the second connecting layer 20. If the direct adhesion between the second sub-part 42 and the first connecting layer 2 cannot meet the usage requirements, a third sub-part 43 may be provided between the second sub-part 42 and the second connecting layer 20 to improve the connection between the second sub-part 42 and the second connecting layer 20.

[0195] Understandably, the positions of the third sub-part 43 and the fourth sub-part 44 can be set according to requirements. When the connection force between the first sub-part 41 / second sub-part 42 and the upper and lower connecting layers cannot meet the requirements, the third sub-part 43 and the fourth sub-part 44 can be selectively set between the two structures to improve the connection reliability between the two structural components; or, if the connection force between the two structures is large, the third sub-part 43 / fourth sub-part 44 can be omitted to avoid increasing unnecessary manufacturing processes and costs. For example, when the second sub-part 42 uses a membrane material, the connection performance between the membrane material and the adhesive material is good. In this case, the connection force between the second sub-part 42 and the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10 can be large, and the third sub-part 43 can be omitted between the second sub-part 42 and the first connecting layer 2, and the fourth sub-part 44 can be omitted between the second sub-part 42 and the second connecting layer 20.

[0196] Figure 13 is a cross-sectional view of the display screen 100 shown in Figure 4 at section line BB, representing another embodiment.

[0197] As shown in Figure 13, the third sub-part 43 can be partially connected between the first sub-part 41 and the first connecting layer 25 of the second part 102 of the cover plate 10, and the other part can be connected between the second sub-part 42 and the first connecting layer 25 of the second part 102 of the cover plate 10. Along the thickness direction of the cover plate 10, the projection of the third sub-part 43 on the first connecting layer 25 of the second part 102 of the cover plate 10 can be staggered from the projection of the glass layer 35 of the second part 102 of the cover plate 10 on the first connecting layer 25 of the second part 102 of the cover plate 10.

[0198] It is understandable that the third sub-part 43 can be manufactured by inkjet or printing processes. The projection of the third sub-part 43 on the first connecting layer 2 and the projection of the glass layer 3 on the first connecting layer 2 are staggered, making the manufacturing process easier.

[0199] In some embodiments, the fourth sub-part 44 may be partially connected between the first sub-part 41 and the second connecting layer 20, and another part may be connected between the second sub-part 42 and the second connecting layer 20. Along the thickness direction of the cover plate 10, the projection of the fourth sub-part 44 onto the first connecting layer 25 of the second portion 102 of the cover plate 10 may also be offset from the projection of the glass layer 35 of the second portion 102 of the cover plate 10 onto the first connecting layer 25 of the second portion 102 of the cover plate 10.

[0200] It is understandable that when the fourth sub-part 44 is manufactured by inkjet or printing process, the projection of the fourth sub-part 44 on the first connecting layer 25 of the second part 102 of the cover plate 10 and the projection of the glass layer 35 of the second part 102 of the cover plate 10 on the first connecting layer 25 of the second part 102 of the cover plate 10 are staggered, making the manufacturing process easier.

[0201] Figure 14 is a schematic diagram of another embodiment of the structure shown in Figure 8.

[0202] As shown in Figure 14, the length of the first compensation structure 4 in the first direction can be greater than the length of the glass layer 35 of the second portion 102 of the cover plate 10 in the first direction. That is, the length of the first compensation structure 4 in the first direction can be greater than the length of the bending area of ​​the cover plate 10. For example, the length L1 of the first sub-part 41 in the first direction can be greater than the length L0 of the second portion 35 of the glass layer 3 in the first direction. The length L2 of the second sub-part 42 in the first direction can be greater than the length of the second portion 35 of the glass layer 3 in the first direction.

[0203] For example, a portion of film layer 1, a portion of first connecting layer 2, a portion of glass layer 3, a portion of first sub-part 41, and a portion of second sub-part 42 can constitute a first portion 101 of cover plate 10. A portion of film layer 1, a portion of first connecting layer 2, a portion of glass layer 3, a portion of first sub-part 41, and a portion of second sub-part 42 can constitute a second portion 102 of cover plate 10. A portion of film layer 1, a portion of first connecting layer 2, a portion of glass layer 3, a portion of first sub-part 41, and a portion of second sub-part 42 can constitute a third portion 103 of cover plate 10.

[0204] It is understandable that the first compensation structure 4 can not only be set in the second part 102 of the cover plate 10, but the positional relationship, material selection and size design of the first compensation structure 4 in the first part 101 and the third part 103 of the cover plate 10 can refer to the positional relationship, material selection and size design of the first compensation structure 4 in the second part 102 of the cover plate 10.

[0205] For example, when the cover plate 10 also includes a second compensation structure 5, the second compensation structure 5 may also be provided with reference to the first compensation structure 4 shown in FIG14. The second compensation structure 5 may participate in constituting the first part 101, the second part 102, and the third part 103 of the cover plate 10.

[0206] In some embodiments, the first edge 351 of the glass layer 35 of the second portion 102 of the cover plate 10 may be recessed toward the inside of the glass layer 35 to form a first groove 353, and / or the second edge 352 of the glass layer 35 of the second portion 102 of the cover plate 10 may be recessed toward the inside of the glass layer 35 to form a second groove 354. Thus, the width of the second portion 35 of the glass layer 3 in the third direction can be smaller than the width of the first portion 34 of the glass layer 3 in the third direction, and smaller than the width of the third portion 36 of the glass layer 3 in the third direction. Figure 14 illustrates an example where the third direction is parallel to the X-axis direction. This reduces the stress on the glass layer 3 during bending. The first compensation structure 4 may be entirely or partially located within the first groove 353. The second compensation structure 5 may be entirely or partially located within the second groove 354.

[0207] Figure 15 is a schematic diagram of another embodiment of the structure shown in Figure 8. For ease of understanding, Figure 15 illustrates the relative positions of the glass layer 3, the first connecting layer 2, and the first compensation structure 4 within the cover plate 10 using different filling patterns. The first part 101, the second part 102, and the third part 103 of the cover plate 10 are schematically distinguished by dashed lines.

[0208] As shown in Figures 5 and 15, the edge of the glass layer 34 of the first portion 101 of the cover plate 10 can be located inside the edge of the first connecting layer 24 of the first portion 101 of the cover plate 10. The edge of the glass layer 36 of the third portion 103 of the cover plate 10 can be located inside the edge of the first connecting layer 26 of the third portion 103 of the cover plate 10. The first compensation structure 4 can be arranged around the glass layer 3 of the cover plate 10. The first compensation structure 4 can be partially located in the first space Q1, partially located in the space enclosed by the edge of the glass layer 34 of the first portion 101 of the cover plate 10 and the first connecting layer 24 of the first portion 101 of the cover plate 10, and partially located in the space enclosed by the edge of the glass layer 36 of the third portion 103 of the cover plate 10 and the first connecting layer 26 of the third portion 103 of the cover plate 10.

[0209] In this way, the edges of the glass layers (the first part 34 and the third part 36 of the glass layer 3) in the cover plate 10 other than the second part 102 and the space enclosed by the first connecting layer 2 can be further filled to eliminate air bubbles; it can also compensate for the step difference caused by the inward shrinkage of the glass layer 3 other than the second part 35, further reducing the risk of air bubbles caused by misalignment between the first connecting layer 2, the first compensation structure 4 and the second connecting layer 20; it can also further increase the impact and extrusion resistance of the edges of the glass layer 3 and reduce the risk of cracks in the glass layer 3.

[0210] Figure 16 is a cross-sectional view of the display screen 100 shown in Figure 4 at section line BB of another embodiment.

[0211] As shown in Figures 4, 5, and 16, the display screen 100 may further include a second cover plate 50, which may include a second film layer 51 and a third connecting layer 52. The second film layer 51 is connected between the second connecting layer 51 and the third connecting layer 52. The third connecting layer 52 may be connected between the second film layer 51 and the display panel 30. The cover plate 10 may be fixedly connected to the second cover plate 50 via the second connecting layer 20. The second cover plate 50 may be fixedly connected to the display panel 30 via the third connecting layer 52.

[0212] It is understood that by providing multiple film layers (first film layer 1 and second film layer 51), the impact and extrusion resistance of the display screen 100 can be improved. In other embodiments, the display screen 100 may also include three or more film layers.

[0213] For example, the material of the second film layer 51 may be polyethylene terephthalate (PET) or colorless polyimide film (CPI). The material of the second film layer 51 may be the same as or different from the material of the first film layer 1.

[0214] In some embodiments, the display screen 100 may further include a support plate 40. The support plate 40 may be fixedly connected to the non-display surface 302 of the display panel 30. It is understood that the support plate 40 can be used to support the display panel 30 and adjust the stress on the display panel 30 when bent. Exemplarily, the support plate 40 may be fixedly connected to the non-display surface 302 of the display panel 30 via a fourth connecting layer 60. Exemplarily, the support plate 40 may be perforated, thereby improving its bending capability.

[0215] This application describes several embodiments of the cover plate 10 with reference to the accompanying drawings. The cover plate 10 may include a first portion 101, a second portion 102, and a third portion 103 connected sequentially along a first direction. The second portion 102 of the cover plate 10 is bendable. The second portion 102 of the cover plate 10 includes a glass layer 35, a first connecting layer 25, and a film layer 12 stacked in a second direction, which is different from the first direction. The first edge 351 of the glass layer 35 of the second portion 102 of the cover plate 10 is located inside the first edge 221 of the first connecting layer 25 of the second portion 102 of the cover plate 10. The first edge 351 of the glass layer 35 of the second portion 102 of the cover plate 10 and the first connecting layer 25 of the second portion 102 of the cover plate 10 enclose a first space Q1. The cover plate 10 also includes a first compensation structure 4, which is at least partially located within the first space Q1 and is fixedly connected to the first connecting layer 25 of the second portion 102 of the cover plate 10. The first compensation structure 4 includes a first sub-part 41 and a second sub-part 42 connected to the first sub-part 41. The first sub-part 41 is located between the second sub-part 42 and the glass layer 3. The material used in the first sub-part 41 includes a curing adhesive.

[0216] It is understood that the second part 102 of the cover plate 10 is bendable, and the second part 102 of the cover plate 10 is the bending area of ​​the cover plate 10. The first edge 351 of the glass layer 35 of the second part 102 of the cover plate 10 is located inside the first edge 221 of the first connecting layer 25 of the second part 102 of the cover plate 10. The first edge 351 of the glass layer 35 of the second part 102 of the cover plate 10 and the first connecting layer 25 of the second part 102 of the cover plate 10 enclose the first space Q1. The first compensation structure 4 is located within the first space Q1. The first compensation structure 4 can be used to compensate for the step difference caused by the inward shrinkage of the glass layer 35 of the second part 102 of the cover plate 10. When the cover plate 10 is used for the display screen 100, the cover plate 10 can be fixedly connected to the display panel 30 through the second connecting layer 20. The first compensation structure 4 can be at least partially located between the first connecting layer 25 and the second connecting layer 20, and can be used to avoid deformation caused by direct contact between the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10. Compared to solutions without the first compensation structure 4, the technical solution of this application reduces the deformation of the first connecting layer 25 and the second connecting layer 20 at the step difference position of the second part 102 of the cover plate 10, thereby reducing the stress and strain of the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10. The first compensation structure 4 avoids direct contact between the first connecting layer 25 and the second connecting layer 20 of the second part 102 of the cover plate 10. At the interface between the first connecting layer 25, the first compensation structure 4, and the second connecting layer 20 of the second part 102 of the cover plate 10, it is less likely to generate air bubbles after misalignment due to repeated bending. The first compensation structure 4 can be used to fill the step difference caused by the inward shrinkage of the glass layer 35 of the second part 102 of the cover plate 10, fill the edge space of the glass layer 35 of the second part 102 of the cover plate 10, and eliminate the initial air bubbles. In this way, when the cover plate 10 is used in the display screen 100, the second part 1002 of the display screen 100 is less likely to generate air bubbles, and the display screen 100 is less likely to experience display failure. The first compensation structure 4 can also regulate the stress during the bending process, increase the impact and extrusion resistance of the glass layer 3 edge, and reduce the risk of cracks in the glass layer 3.

[0217] The material used for the first sub-part 41 includes a curing adhesive, which has adhesive properties. This eliminates the need for additional connecting structures for the fixed connection between the first sub-part 41 and the glass layer 35 of the second part 102 of the cover plate 10, the first connecting layer 25 of the second part 102 of the cover plate 10, and the second sub-part 42. The manufacturing process is relatively simple and easy. Furthermore, the curing adhesive has fluidity before curing, which can effectively fill the gap between the second sub-part 42 and the glass layer 35 of the second part 102 of the cover plate 10, eliminating air bubbles. This results in good surface contact and strong connection between the first sub-part 41 and the glass layer 35 of the second part 102 of the cover plate 10, the first connecting layer 25 of the second part 102 of the cover plate 10, and the second sub-part 42. This increases the impact and compression resistance of the edges of the glass layer 35 of the second part 102 of the cover plate 10, reducing the risk of cracks in the glass layer 35 of the second part 102 of the cover plate 10.

[0218] During the fabrication process of the cover plate 10, when fabricating the first compensation structure 4, the second sub-part 42 is fabricated first, followed by the first sub-part 41. The material used for the first sub-part 41 includes a curing adhesive. The curing adhesive is fluid before solidification, and has good wettability between the curing adhesive and the glass layer 35 of the second part 102 of the cover plate 10. Therefore, after the curing adhesive comes into contact with the glass layer 35 of the second part 102 of the cover plate 10, it can easily spread quickly on the surface of the glass layer 35 of the second part 102 of the cover plate 10. By setting the second sub-part 42, an adsorption force can be generated on the curing adhesive before solidification. As a result, the curing adhesive before solidification can be subjected to a force in the direction of the second sub-part 42, thereby reducing the degree of spread of the curing adhesive on the glass layer 35 of the second part 102 of the cover plate 10. This reduces the area of ​​the curing adhesive (first sub-part 41) between the glass layer 35 of the second part 102 of the cover plate 10 and the second connecting layer 20 in the XY plane. Normally, the adhesive strength between the materials used in the first sub-part 41 and the second connecting layer 20, and the adhesive strength between the materials used in the first sub-part 41 and the materials used in the glass layer 35 of the second part 102 of the cover plate 10, are both less than the adhesive strength between the materials used in the glass layer 35 of the second part 102 of the cover plate 10 and the materials used in the second connecting layer 20. By providing the second sub-part 42, the contact area between the first sub-part 41 and the bottom surface of the glass layer 35 of the second part 102 of the cover plate 10 can be reduced, with the bottom surface of the glass layer 35 of the second part 102 of the cover plate 10 facing the second connecting layer 20. Therefore, by providing the second sub-part 42, the connection area between the glass layer 35 of the second part 102 of the cover plate 10 and the second connecting layer 20 can be increased, resulting in better connection reliability between the glass layer 3 and the second connecting layer 20, and reducing the risk of misalignment between the glass layer 3 and the second connecting layer 20 after multiple bends of the cover plate 10.

[0219] It is understood that, in some embodiments, when the edges of the glass layer 34 of the first portion 101 and / or the edges of the glass layer 36 of the third portion 103 of the cover plate 10 also enclose a space with the first connecting layer 2, the first compensation structure 4 can be extended to the first portion 101 and / or the third portion 103 of the cover plate 10. The arrangement of the first compensation structure 4 within the first portion 101 and the third portion 103 of the cover plate 10 can refer to the arrangement of the first compensation structure 4 within the second portion of the cover plate 10. In this way, when the cover plate 10 is used for the display screen 100, the risk of air bubbles forming in the first portion 1001 and the third portion 1003 of the display screen 100 can be reduced. Furthermore, the further extension of the first compensation structure 4 also helps to enhance the impact and compression resistance of the edges of the glass layer 34 of the first portion 101 and / or the glass layer 36 of the third portion 103 of the cover plate 10, reducing the risk of cracks forming in the glass layer 34 of the first portion 101 and / or the glass layer 36 of the third portion 103 of the cover plate 10.

[0220] It is understood that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0221] It is understood that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0222] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cover plate (10), characterized in that, It includes a first part (101), a second part (102) and a third part (103) connected sequentially along a first direction, wherein the second part (102) is bendable; The second part (102) of the cover plate (10) includes a glass layer (35), a first connecting layer (25) and a film layer (12) stacked in a second direction, which is different from the first direction; The first edge (351) of the glass layer (35) is located inside the first edge (221) of the first connecting layer (25), and the first edge (351) of the glass layer (35) and the first connecting layer (25) enclose the first space (Q1); The cover plate (10) further includes a first compensation structure (4), which is at least partially located within the first space (Q1) and is fixedly connected to the first connecting layer (25); The first compensation structure (4) includes a first sub-part (41) and a second sub-part (42) connecting the first sub-part (41). The first sub-part (41) is located between the second sub-part (42) and the glass layer (35). The material used for the first sub-part (41) includes a curing adhesive.

2. The cover plate (10) according to claim 1, characterized in that, The relationship between the thickness h1 of the first sub-part (41) and the thickness h0 of the glass layer (35) satisfies: (h0-10μm)≤h1≤(h0+50μm).

3. The cover plate (10) according to claim 1 or 2, characterized in that, The materials used in the second sub-part (42) include curing adhesive; The outer side (414) of the first sub-part (41) faces away from the glass layer (35), and the outer side (414) of the first sub-part (41) is fixedly connected to the second sub-part (42).

4. The cover plate (10) according to claim 3, characterized in that, The outer surface (414) of the first sub-part (41) includes a first side (4141) and a second side (4142), the first side (4141) and the second side (4142) are arranged at intervals in the second direction, and the first side (4141) is connected to the first connecting layer (25). The first side (4141) is closer to the glass layer (35) than the second side (4142).

5. The cover plate (10) according to any one of claims 1 to 4, characterized in that, The materials used in the second sub-part (42) include one or more of ultraviolet curing adhesive, infrared curing adhesive and moisture curing adhesive.

6. The cover plate (10) according to any one of claims 1 to 5, characterized in that, The first compensation structure (4) further includes a third sub-part (43), which is at least partially fixedly connected between the first sub-part (41) and the first connecting layer (25).

7. The cover plate (10) according to claim 6, characterized in that, The materials used in the first sub-part (41) and the first connecting layer (25) both include acrylic materials; The materials used in the third subsection (43) include one or more of silane coupling agents, resins, and low-temperature inks.

8. The cover plate (10) according to claim 5 or 6, characterized in that, A portion of the third sub-part (43) is fixedly connected between the first sub-part (41) and the first connecting layer (25), and a portion is fixedly connected between the second sub-part (42) and the first connecting layer (25).

9. The cover plate (10) according to any one of claims 6 to 8, characterized in that, Along the thickness direction of the cover plate (10), the projection of the third sub-part (43) on the first connecting layer (25) and the projection of the glass layer (35) on the first connecting layer (25) are staggered.

10. The cover plate (10) according to any one of claims 6 to 9, characterized in that, The thickness of the third sub-part (43) is greater than or equal to 100 nm and less than or equal to 5 μm.

11. The cover plate (10) according to any one of claims 1 to 4, characterized in that, The elastic modulus of the material used in the second sub-part (42) is greater than the energy storage modulus of the material used in the first sub-part (41).

12. The cover plate (10) according to claim 11, characterized in that, The materials used in the second sub-part (42) include one or more of PET film, TPU film, CPI film and optically transparent adhesive.

13. The cover plate (10) according to claim 12, characterized in that, The first side surface (335) of the glass layer (35) includes a first inclined surface (331), the first inclined surface (331) is connected to the first connecting layer (25), and the first inclined surface (331) and the first connecting layer (25) are set at an acute angle, and a portion of the first sub-part (41) is fixedly connected between the first inclined surface (331) and the first connecting layer (25).

14. The cover plate (10) according to claim 12 or 13, characterized in that, The connection length L of the first sub-part (41) and the glass layer (35) in the third direction is greater than or equal to 0 μm and less than or equal to 1000 μm, and the third direction is different from both the second direction and the first direction.

15. The cover plate (10) according to any one of claims 1 to 14, characterized in that, The 180° peel force between the material used in the first sub-part (41) and the material used in the first connecting layer (25) is F1, and the 180° peel force between the material used in the glass layer (35) and the material used in the first connecting layer (25) is F2. F1 and F2 satisfy the relationship: F1 / F2≥0.

2.

16. The cover plate (10) according to any one of claims 1 to 15, characterized in that, At room temperature, the energy storage modulus of the material used in the first sub-part (41) is greater than or equal to 10 kPa and less than or equal to 100 MPa.

17. The cover plate (10) according to any one of claims 1 to 16, characterized in that, At room temperature, the 180° peel force between the material used in the first sub-part (41) and the material used in the first connecting layer (25) is greater than or equal to 1 N / cm and less than or equal to 16 N / cm.

18. The cover plate (10) according to any one of claims 1 to 17, characterized in that, At room temperature, the creep recovery rate of the material used in the first sub-part (41) is greater than or equal to 60% and less than or equal to 99%.

19. The cover plate (10) according to any one of claims 1 to 18, characterized in that, The second edge (352) of the glass layer (35) is located inside the second edge (222) of the first connecting layer (25). The second edge (352) of the glass layer (35) and the first connecting layer (25) enclose a second space (Q2). The first edge (351) and the second edge (352) are arranged upward along a third direction, which is different from both the second direction and the first direction. The cover plate (10) further includes a second compensation structure (5), which is at least partially located within the second space (Q2) and is fixedly connected to the first connecting layer (25). The glass layer (35) is located between the first compensation structure (4) and the second compensation structure (5).

20. The cover plate (10) according to any one of claims 1 to 18, characterized in that, The first compensation structure (4) is disposed around the glass layer (3) of the cover plate (10).

21. A display screen (100), characterized in that, It includes a display panel (30), a second connecting layer (20), and a cover plate (10) as claimed in any one of claims 1 to 20, wherein the second connecting layer (20) is connected between the display panel (30) and the cover plate (10); The glass layer (35) and the first compensation structure (4) are both connected between the first connecting layer (25) and the second connecting layer (20).

22. An electronic device (1000), characterized in that, The device includes a first housing (210), a second housing (220), a folding mechanism (300), and a display screen (100) as described in claim 21. The folding mechanism (300) is connected between the first housing (210) and the second housing (220), and the first housing (210) and the second housing (220) can be unfolded or folded relative to each other by means of the folding mechanism (300). A portion of the display screen (100) is fixed to the first housing (210), a portion is fixed to the second housing (220), and a portion is fixed to the folding mechanism (300).

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