A flexible display panel, display screen and electronic device

Abstract

The application provides a flexible display panel, a display screen and an electronic device, relates to the technical field of display, and is used for solving the problem of how to improve the screen ratio and product competitiveness of the electronic device. The flexible display panel comprises a main viewing part, a first side viewing part, a second side viewing part and a third side viewing part arranged at the edge of the main viewing part; the third side viewing part is connected between the first side viewing part and the second side viewing part; the first side viewing part, the second side viewing part and the third side viewing part extend away from the middle part of the main viewing part from a first section, a second section and a corner section of the main viewing part respectively, and are bent towards the back side. The electronic device provided by the application is used for displaying pictures or information.

Description

[0001] This application is a divisional application, the original application number is 202210113128.3, the filing date is January 29, 2022, and the name is: a flexible display panel, a display screen and an electronic device.

[0002] The present application claims priority to the Chinese patent application No. 202111436962.8 filed on November 29, 2021, and entitled "A four-curved screen", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of display, in particular to a flexible display panel, a display screen and an electronic device. BACKGROUND

[0004] At present, the appearance of electronic devices such as mobile phones and tablet computers is becoming more and more homogeneous. As an important part of electronic devices, the form of display screens (which can also be referred to as screens) will be an important factor for electronic devices to distinguish from other brand products. In addition, with the improvement of living standards, users increasingly need to improve the screen ratio of display screens.

[0005] In order to improve the competitiveness of products and the screen ratio of display screens, electronic devices are gradually developing towards curved screens. For general curved screen electronic devices, in order to prevent the internal flexible display panel from wrinkling, the flexible display panel is provided with a curved curved surface shape at both side parts of the display screen, and is not curved at the top and bottom. In this way, the top and bottom frames are directly laid under the cover glass (CG), so that the screen ratio of such electronic devices cannot be further improved. In addition, since the flexible display panel is not curved at the top and bottom, the appearance form of the curved screen electronic device is fixed, the product competitiveness is weak, and the user experience effect is also poor. SUMMARY

[0006] The embodiments of the present application provide a flexible display panel, a display screen and an electronic device, which are used to solve the problem of how to improve the screen ratio and product competitiveness of electronic devices.

[0007] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, a flexible display panel is provided. The flexible display panel includes a main viewing portion, and a first side viewing portion, a second side viewing portion and a third side viewing portion disposed at edges of the main viewing portion. The main viewing portion includes a middle portion and edges. The edges of the main viewing portion include a first segment, a second segment and a corner segment connected between the first segment and the second segment. The main viewing portion includes a display surface and a back surface opposite to the display surface. The first side viewing portion extends away from the middle portion of the main viewing portion from the first segment and bends towards the back surface side. The second side viewing portion extends away from the middle portion of the main viewing portion from the second segment and bends towards the back surface side. The third side viewing portion is connected between the first side viewing portion and the second side viewing portion, and the third side viewing portion extends away from the middle portion of the main viewing portion from the corner segment and bends towards the back surface side.

[0009] In this way, the flexible display panel is provided with a curved surface shape at the side portion, the top portion or the bottom portion, and is also provided with a curved surface shape at the edge corner portion. When the flexible display panel is applied to an electronic device, there is no need to form an angle on the middle frame, thereby reducing the processing difficulty of the middle frame. At the same time, the flexible display panel is provided in the curved surface shape of the edge corner position of the light-transmitting cover plate in addition to the curved surface shape of the side portion, the top portion or the bottom portion of the light-transmitting cover plate, so that the black border width of the front corner position of the electronic device is consistent with the black border width of the side portion, the top portion or the bottom portion, and the appearance effect of the front of the electronic device is ensured. At the same time, the screen ratio of the electronic device can be further increased, the information carrying efficiency of the display area is improved, and the product competitiveness is improved.

[0010] In a possible implementation manner of the first aspect, two ends of the outer contour of the third side viewing portion are connected with the outer contour of the first side viewing portion and the outer contour of the second side viewing portion respectively, and a middle portion of the outer contour of the third side viewing portion is raised towards the main viewing portion in a direction perpendicular to the main viewing portion. In this way, the part of the third side viewing portion between the raised part of the middle portion of the outer contour and the corner segment forms a redundant part of the edge corner portion of the flexible display panel, and the redundant part is in an unfolded state and does not generate a wrinkle, so that the display effect of the electronic device is not affected when the flexible display panel is applied to the electronic device.

[0011] In a possible implementation manner of the first aspect, a projection of the outer contour of the first side viewing portion on the display surface is a first projection. A projection of the outer contour of the second side viewing portion on the display surface is a second projection. A projection of the outer contour of the third side viewing portion on the display surface is a third projection. The third projection is a transition arc connected between the first projection and the second projection. In this way, when the flexible display panel is applied to an electronic device such as a mobile phone, the edge corner of the front of the electronic device is in a rounded corner shape, which can ensure the appearance and is more in line with the use habits of users.

[0012] In a possible implementation manner of the first aspect, the third side view portion is in the fourth projection of the orthographic projection of the display surface, and the intersection of the length line of the first segment and the extension line of the second segment is located in the fourth projection. In this way, the third side view portion has a larger area, the orthographic projection area of the display surface is larger, and the screen-to-body ratio of the electronic device can be further improved.

[0013] In a possible implementation manner of the first aspect, the height of the third side view portion in the direction perpendicular to the main view portion is greater than or equal to 0.05 mm and less than or equal to 0.25 mm. In this way, the flexible display panel has a moderate redundancy in the third side view portion, and the flexible display panel can be prevented from being wrinkled as much as possible while maintaining the curved shape.

[0014] In a possible implementation manner of the first aspect, the first segment and the second segment are both straight line segments, and the first segment is perpendicular to the second segment.

[0015] In a possible implementation manner of the first aspect, the corner segment is a transition arc connected between the first segment and the second segment. In this way, the edge of the main view portion is smoothly transitioned, and the first side view portion, the third side view portion, and the second side view portion arranged at the edge of the main view portion can be smoothly transitioned in sequence, and the flexible display panel can be prevented from being damaged due to an excessively large bending angle between the first side view portion and the third side view portion, between the third side view portion and the second side view portion, and in the third side view portion.

[0016] In a possible implementation manner of the first aspect, the length of the first segment is greater than the length of the second segment.

[0017] The second aspect further provides a display screen, which includes a light-transmitting cover plate and the flexible display panel as in any of the preceding technical solutions. The light-transmitting cover plate includes a flat portion and a first arc piece portion, a second arc piece portion, and a third arc piece portion arranged at the edge of the flat portion. The flat portion includes a central portion and an edge. The edge of the flat portion includes a first side, a second side, and a corner side connected between the first side and the second side. The first arc piece portion extends away from the central portion of the flat portion from the first side of the flat portion and bends toward the inside of the flat portion. The second arc piece portion extends away from the central portion of the flat portion from the second side of the flat portion and bends toward the inside of the flat portion. The third arc piece portion is connected between the first arc piece portion and the second arc piece portion, and the third arc piece portion extends away from the central portion of the flat portion from the corner side of the flat portion and bends toward the inside of the flat portion. The flexible display panel is arranged on the inside of the light-transmitting cover plate. The main view portion of the flexible display panel is arranged in layers with the flat portion, and the display surface of the main view portion faces the flat portion. The first side view portion of the flexible display panel is arranged in layers with the first arc piece portion. The second side view portion of the flexible display panel is arranged in layers with the second arc piece portion. The third side view portion of the flexible display panel is arranged in layers with the third arc piece portion.

[0018] Since the display screen provided by the embodiment includes the flexible display panel as described in any of the above embodiments, and the flat plate portion, the first arc piece portion, the second arc piece portion and the third arc piece portion of the light-transmitting cover plate are respectively laminated with the front viewing portion, the first side viewing portion, the second side viewing portion and the third side viewing portion of the flexible display panel, a curved display screen can be formed, which is curved not only at the side portion, the top portion or the bottom portion, but also at the edge corner position, and the curved shape at the edge corner position can be used for displaying pictures or information, so that the screen ratio and product competitiveness can be improved.

[0019] In a possible implementation of the second aspect, two ends of the outer contour of the third arc piece portion are respectively connected with the outer contour of the first arc piece portion and the outer contour of the second arc piece portion, and the middle part of the outer contour of the third arc piece portion is curved upward along a direction perpendicular to the flat plate portion and close to the flat plate portion. In this way, the third arc piece portion is adapted to the third side viewing portion of the flexible display panel, and the fitting effect of the two can be ensured.

[0020] In a possible implementation of the second aspect, the orthographic projection of the outer contour of the first arc piece portion on the outer surface of the flat plate portion is a fifth projection, the orthographic projection of the outer contour of the second arc piece portion on the outer surface of the flat plate portion is a sixth projection, and the orthographic projection of the outer contour of the third arc piece portion on the outer surface of the flat plate portion is a seventh projection. The seventh projection is a transition arc connected between the fifth projection and the sixth projection. In this way, when the light-transmitting cover plate is applied to the electronic device, the edge corner portion of the light-transmitting cover plate presents a round corner shape on the front surface of the electronic device, the appearance can be ensured, and the use habit of the user can be better met.

[0021] In a possible implementation of the second aspect, the orthographic projection of the third arc piece portion on the outer surface of the flat plate portion is an eighth projection, and the intersection of the extension line of the first side and the extension line of the second side is located in the eighth projection. In this way, the area of the third arc piece portion is large, and the third side viewing portion can be covered to effectively protect the third side viewing portion.

[0022] In a possible implementation of the second aspect, the thickness of the first arc piece portion, the second arc piece portion and the third arc piece portion gradually decreases from one end connected with the flat plate portion to the outer contour. In this way, on the premise that the inner surfaces of the first arc piece portion, the second arc piece portion and the third arc piece portion are adapted to the first side viewing portion, the second side viewing portion and the third side viewing portion of the flexible display panel respectively, the curvature of the outer surfaces of the first arc piece portion, the second arc piece portion and the third arc piece portion is larger, and the pictures that can be appreciated by the user tend to be 3D.

[0023] In a possible implementation manner of the second aspect, a length of the first arc piece in a direction parallel to the flat plate and perpendicular to the first side is less than or equal to 6 mm. Optionally, the length can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm, and the like. In this way, when the light-transmitting cover plate is applied to the electronic device, the first arc piece occupies a smaller area on the front of the electronic device, and on the premise that the display area is certain, the area of the flat plate can be set larger, so that the user can view more images or information displayed by the flexible display panel from the flat plate, thereby reducing visual errors.

[0024] In a possible implementation manner of the second aspect, lengths of the second arc pieces in a direction parallel to the flat plate and perpendicular to the second side are all less than or equal to 6 mm. Optionally, the length can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm, and the like. In this way, when the light-transmitting cover plate is applied to the electronic device, the second arc piece occupies a smaller area on the front of the electronic device, and on the premise that the display area is certain, the area of the flat plate can be set larger, so that the user can view more images or information displayed by the flexible display panel from the flat plate, thereby reducing visual errors.

[0025] In a possible implementation manner of the second aspect, a height of the first arc piece in a direction perpendicular to the flat plate is less than or equal to 3.5 mm. Optionally, the height can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm, and the like. Since the height of the first arc piece affects the height of the light-transmitting cover plate, and the height of the light-transmitting cover plate affects the thickness of the electronic device when the light-transmitting cover plate is applied to the electronic device, the height of the first arc piece is less than or equal to 3.5 mm, which is beneficial to the thinness of the electronic device.

[0026] In a possible implementation manner of the second aspect, a height of the second arc piece in a direction perpendicular to the flat plate is less than or equal to 1.5 mm. Optionally, the height can be 0.5 mm, 0.8 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, and the like. When the light-transmitting cover plate is applied to the electronic device, the outer edge of the second arc piece covers the top edge or the bottom edge of the frame of the middle frame. On this basis, since the height of the second arc piece is less than or equal to 1.5 mm, the height is small, and on the premise that the thickness of the electronic device is certain, the thickness of the frame of the middle frame can be designed larger, so as to facilitate the arrangement of structures such as a USB interface, a speaker sound hole and an earphone hole on the top edge and the bottom edge of the frame.

[0027] In a possible implementation manner of the second aspect, an angle between a tangent plane at an outer edge of the inner surface of the first arc piece and the outer surface of the flat plate, and an angle between a tangent plane at an outer edge of the inner surface of the second arc piece and the outer surface of the flat plate are each less than or equal to 89°. In this way, the picture that a user appreciates tends to be more 3D.

[0028] In a possible implementation manner of the second aspect, a radius of curvature of the inner surface of the first arc piece and a radius of curvature of the inner surface of the second arc piece are each greater than or equal to 2.5 mm. Optionally, the two radii of curvature can be 2.5 mm, 3 mm, 3.5 mm, 4 mm, and the like. In this way, the radii of curvature of the inner surface of the first arc piece and the inner surface of the second arc piece are relatively large, and when the planar light-transmissive cover plate is bent by heat pressing or the like to form the first arc piece and the second arc piece, the bending angle is relatively small, and the forming yield of the first arc piece and the second arc piece can be ensured. In the embodiments of the present application, the radii of curvature of the respective portions on the inner surface of the first arc piece and the inner surface of the second arc piece can be the same or different, and are not specifically limited in the embodiments of the present application.

[0029] In a possible implementation manner of the second aspect, a height of the third arc piece in a direction perpendicular to the flat plate is greater than or equal to 1 mm and less than or equal to 2 mm. In this way, the height of the third arc piece is moderate, and the middle portion of the outer edge of the third arc piece can avoid being raised too much to affect the 3D display effect of the electronic device.

[0030] The third aspect further provides an electronic device including the display screen, the middle frame, the back cover, and the circuit board according to any one of the technical solutions described above. The back cover is arranged in a stack with the display screen, the middle frame is arranged between the back cover and the display screen, an internal accommodation space of the electronic device is formed between the middle frame and the back cover, the circuit board is arranged in the internal accommodation space, and the circuit board is electrically connected to the flexible display panel of the display screen.

[0031] Since the electronic device provided in the embodiments of the present application includes the display screen described in the above embodiments, the electronic device can achieve four-curved-surface display, and has a relatively large screen-to-body ratio and relatively high competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1a A perspective view of an electronic device provided in some embodiments of the present application;

[0033] Figure 1b A perspective view of an electronic device provided in some embodiments of the present application; Figure 1a An exploded view of the electronic device shown in FIG. 8;

[0034] Figure 2 A structure schematic view of a flexible display panel in the electronic device shown in FIG. 8; Figure 1a and Figure 1b A structure schematic view of a flexible display panel in the electronic device shown in FIG. 8;

[0035] Figure 3 For including Figure 2 A perspective view of another electronic device with a flexible display panel shown;

[0036] Figure 4 for Figure 1a Front view of the electronic device shown;

[0037] Figure 5 for Figure 4 A magnified view of a portion of region I in the electronic device shown;

[0038] Figure 6 for Figure 3 Front view of the electronic device shown;

[0039] Figure 7 for Figure 6 A magnified view of a portion of region II in the electronic device shown;

[0040] Figure 8 A perspective view of a flexible display panel provided in some embodiments of this application;

[0041] Figure 9 for Figure 8 The flexible display panel shown is a cross-sectional view at line AA;

[0042] Figure 10 for Figure 8 The flexible display panel shown is a cross-sectional view at the BB line;

[0043] Figure 11 for Figure 8 The flexible display panel shown is a cross-sectional view at the CC line.

[0044] Figure 12 for Figure 8 A magnified view of a portion of region III in the flexible display panel shown.

[0045] Figure 13 for Figure 12 The diagram shows the structure of the flexible display panel as viewed from direction D.

[0046] Figure 14 for Figure 13 A schematic diagram of the orthographic projection of the first side view, the second side view, and the third side view in the flexible display panel shown onto the display surface of the main view.

[0047] Figure 15 for Figure 14 The flexible display panel shown is a cross-sectional view at section L.

[0048] Figure 16 for Figure 8 The diagram shows the structure of the flexible display screen.

[0049] Figure 17 Structure diagram of the display screen provided in some embodiments of the present application;

[0050] Figure 18 Structure diagram of the display screen provided in some embodiments of the present application; Figure 17

[0051] Structure diagram of the display screen provided in some embodiments of the present application; Figure 19 Figure 17-18 Structure diagram of the display screen provided in some embodiments of the present application;

[0052] Figure 20 Figure 17-18 Structure diagram of the display screen provided in some embodiments of the present application;

[0053] Figure 21 Structure diagram of the display screen provided in some embodiments of the present application; Figure 19

[0054] Structure diagram of the display screen provided in some embodiments of the present application; Figure 22 Figure 19 Structure diagram of the display screen provided in some embodiments of the present application;

[0055] Figure 23 Figure 19 Structure diagram of the display screen provided in some embodiments of the present application;

[0056] Figure 24 Structure diagram of the display screen provided in some embodiments of the present application; Figure 19

[0057] Structure diagram of the display screen provided in some embodiments of the present application; Figure 25 DETAILED DESCRIPTION

[0058] In the embodiments of the present application, the terms “first”, “second”, “third”, “fourth”, “fifth”, “sixth”, “seventh”, and “eighth” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first”, “second”, “third”, “fourth”, “fifth”, “sixth”, “seventh”, and “eighth” can explicitly or implicitly include one or more of the features.

[0059] ​​​​​In the embodiments of the present application, the terms "comprising", "containing" or any other variant thereof are intended to encompass a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements not only includes those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0060] In the embodiments of the present application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0061] In order to improve the screen ratio of the electronic device and the product competitiveness, the curved shape can be set on both sides of the display screen, and the curved shape can also be added on the top and bottom of the display screen to form a four-curved screen form. In this way, on the basis of reducing the width of the two side frames, the width of the top and bottom frames of the electronic device is further reduced, thereby increasing the screen ratio of the electronic device, and also enhancing the user experience of the up and down sliding operation on the display screen, thereby improving the product competitiveness.

[0062] However, in the four-curved screen electronic device, the display screen usually includes a light-transmitting cover plate (such as CG) and a flexible display panel. The light-transmitting cover plate is in a four-curved form, and the flexible display panel is attached to the inner surface of the light-transmitting cover plate. Since the flexible display panel is in a planar sheet shape before being attached to the inner surface of the light-transmitting cover plate, there is redundancy at the edge corner position of the inner surface after being attached to the inner surface, which is easy to produce wrinkles, thereby causing poor appearance.

[0063] In order to meet the four-curved screen form of the electronic device while preventing the flexible display panel from producing wrinkles, the part of the flexible display panel located at the edge corner position of the light-transmitting cover plate can be cut off.

[0064] Specifically, please refer to Figure 1a , Figure 1aA perspective view of the electronic device 100 is provided for some embodiments of the present application. The embodiments of the present application and the following embodiments are described by taking the electronic device 100 as a curved-screen mobile phone, which cannot be considered as a specific limitation to the present application. The electronic device 100 is approximately rectangular and flat. In order to facilitate the description of the following embodiments, an XYZ coordinate system is established. The width direction of the electronic device 100 is defined as the X-axis direction, the length direction of the electronic device 100 is defined as the Y-axis direction, and the thickness direction of the electronic device 100 is defined as the Z-axis direction. It can be understood that the coordinate system of the electronic device 100 can be flexibly set according to actual needs, which is not specifically limited here. In some other embodiments, the shape of the electronic device 100 can also be square, circular, elliptical, and the like.

[0065] The electronic device 100 has a front surface 100a approximately perpendicular to the Z-axis direction and a back surface 100b. The front surface 100a of the electronic device 100 has a display interface for displaying pictures or information, and when the electronic device 100 is in a use state, the front surface 100a of the electronic device 100 faces the user to present pictures or information to the user. The back surface 100b of the electronic device 100 is opposite to the front surface 100a of the electronic device 100, and the back surface 100b can be provided with a light-transmitting window of a rear camera, a camera decoration, and the like. The electronic device 100 also has opposite top and bottom portions a and b, and opposite side portions c and d. The top and bottom portions a and b are two end portions of the electronic device 100 in the Y-axis direction, and the side portions c and d are two end portions of the electronic device 100 in the X-axis direction. When the electronic device 100 presents pictures or information to the user by means of the front surface 100a, the top portion a is located above the user's line of sight, the bottom portion b is located below the user's line of sight, and the side portions c and d are located on the left and right sides of the user's line of sight, respectively. The top portion a is usually provided with a front camera, an earpiece, an earphone hole, and the like. The bottom portion b is usually provided with a loudspeaker sound hole, a universal serial bus (USB) interface, and the like. The side portion d is usually provided with a side key.

[0066] On the basis of the above, it should be noted that in the following embodiments, the "top" used to describe the components in the electronic device 100 refers to the part of the electronic device 100 that constitutes the top portion a when the described component is applied to the electronic device 100 shown in FIG. 1; the "bottom" refers to the part of the electronic device 100 that constitutes the bottom portion b when the described component is applied to the electronic device 100 shown in FIG. 1; and the "side" refers to the part of the electronic device 100 that constitutes the side portion when the described component is applied to the electronic device 100 shown in FIG. 1. Figure 1a Figure 1a Figure 1a ​​The part shown is a side c or side d that constitutes the electronic device 100. This is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0067] Please refer to the following: Figure 1a and Figure 1b , Figure 1b for Figure 1a The exploded view of the electronic device 100 is shown. The electronic device 100 includes a display screen 10, a mid-frame 20, a back cover 30, and a circuit board 40. It is understood that... Figure 1a and Figure 1b The accompanying drawings below only schematically illustrate some components included in the electronic device 100; the actual shape, size, location, and construction of these components are not subject to change. Figure 1a , Figure 1b And the limitations of the figures below.

[0068] The display screen 10 is used to display images, videos, etc. Optionally, the display screen 10 includes a light-transmitting cover plate 2 and a flexible display panel 1. The light-transmitting cover plate 2 and the flexible display panel 1 are stacked and fixedly connected by adhesive or other means. The light-transmitting cover plate 2 mainly serves to protect the flexible display panel 1 and prevent dust. The material of the light-transmitting cover plate 2 includes, but is not limited to, plastic and glass. The flexible display panel 1 can 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 (MicroOLED) display panel, a quantum dot light-emitting diode (QLED) display panel, etc.

[0069] The middle frame 20 is connected to the display screen 10. The middle frame 20 serves as a support frame for electronic components in the electronic device 100, supporting the display screen 10 on it.

[0070] The back cover 30 is located on the side of the middle frame 20 away from the display screen 10, and the back cover 30 is attached to the middle frame 20. The middle frame 20 and the back cover 30 form an internal housing space for the electronic device 100.

[0071] On the basis of the above, it needs to be explained that in each of the following embodiments, unless otherwise specified, the "inner side" adopted by each component in the electronic device 100 refers to the side of the component close to the internal accommodation space of the electronic device 100, and the "inner surface" refers to the surface of the component close to the internal accommodation space of the electronic device 100; the "outer side" refers to the side of the component away from the internal accommodation space of the electronic device 100; and the "outer surface" refers to the surface of the component away from the internal accommodation space of the electronic device 100. It is not intended or implied that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0072] The circuit board 40 is arranged in the internal accommodation space of the electronic device 100. The circuit board 40 can be a main circuit board or a secondary circuit board. The circuit board 40 is electrically connected to the flexible display panel 1 of the display screen 10 to transmit images or information to the flexible display panel 1.

[0073] Please refer to Figure 2 , Figure 2 for Figure 1a and Figure 1b the structural schematic diagram of the flexible display panel 1 in the electronic device 100. It needs to be explained that Figure 2 and the coordinate system in the following drawings showing the flexible display panel are the same coordinate system as Figure 1a and Figure 1b . That is, the positional relationship of each part of the flexible display panel 1 in Figure 2 and the coordinate system in the following drawings showing the flexible display panel is the same as the positional relationship of each part in Figure 1a and Figure 1b in the coordinate system when the flexible display panel 1 is applied to Figure 1a and Figure 1b . The flexible display panel 1 includes a main viewing part 11, a first side viewing part 12 and a second side viewing part 13 arranged around the edge of the main viewing part 11. The main viewing part 11 has a middle part and an edge, and the first side viewing part 12 extends away from the middle part of the main viewing part 11 from one end edge of the main viewing part 11 in the X-axis direction and bends towards the back side of the main viewing part 11. Among them, the back side of the main viewing part 11 refers to the side close to the back 100b of the electronic device 100 when the flexible display panel 1 is applied to Figure 1a and Figure 1b . The second side viewing part 13 extends away from the middle part of the main viewing part 11 from one end edge of the main viewing part 11 in the Y-axis direction and bends towards the back side of the main viewing part 11. In this way, the flexible display panel 1 is applied to Figure 1a and Figure 1bWhen the display screen 10 of the electronic device 100 shown is used, the display screen 10 can be made to present a four-curved surface shape. The outer contour of the main viewing portion 11 includes a corner segment 111, one end of which connects to the outer contour of the first side viewing portion 12, and the other end connects to the outer contour of the second side viewing portion 13. The corner segment 111, the outer contour of the first side viewing portion 12, and the outer contour of the second side viewing portion 13 form the outer contour of the flexible display panel 1. In this way, a notch is formed at the edge corner of the flexible display panel 1, and when the flexible display panel 1 is attached to the inner surface of the four-curved light-transmitting cover, no wrinkles will occur at the corner.

[0074] When the flexible display panel 1 shown in the above embodiment is applied to Figure 1a and Figure 1b When using the electronic device shown, the edges and corners of the light-transmitting cover 2 can also be notched. Of course, the light-transmitting cover 2 can also maintain a complete four-curved surface shape, that is, the sides, top, bottom, and edges and corners of the light-transmitting cover are all curved. Figure 1a and Figure 1b An example is given where the edge corner of the light-transmitting cover 2 is not provided. This should not be considered as a specific limitation on the structure of the light-transmitting cover 2.

[0075] When the edges and corners of the light-transmitting cover are also notched, please refer to [the relevant documentation]. Figure 1a and Figure 1b The flexible display panel 1 and the light-transmitting cover 2 both have missing corners at their edges and corners. The middle frame 20 needs to fill the missing corners upwards, which creates a warped corner A on the middle frame 20, increasing the processing difficulty of the middle frame 20.

[0076] When the light-transmitting cover maintains its complete four-curved shape, please refer to Figure 3 , Figure 3 For including Figure 2 The diagram shows a perspective view of another electronic device 100 based on the flexible display panel 1. In this embodiment, the corners of the flexible display panel 1 are notched, while the light-transmitting cover 2 maintains a complete four-curved surface shape. The corners of the flexible display panel 1 do not extend into the corner area of ​​the light-transmitting cover 2. A black light-shielding layer can be provided on the inner surface of the corner of the light-transmitting cover 2 to shield the internal structure of the electronic device 100, thereby ensuring the uniformity of the appearance of the electronic device 100. Consequently, the black border at the corner of the light-transmitting cover 2 is wider than the black borders on the sides, top, and bottom. Viewed from the front 100a of the electronic device 100, the rounded corners of the light-transmitting cover are inconsistent with the rounded corners of the display area, thus affecting the appearance of the electronic device 100.

[0077] Please see Figure 4-7 , Figure 4 for Figure 1a The front view of the electronic device 100 shown.Figure 5 As shown in the front view of the electronic device 100, Figure 4 As shown in the partial enlarged view of region I of the electronic device 100, Figure 6 As shown in the front view of the electronic device 100, Figure 3 As shown in the partial enlarged view of region II of the electronic device 100. As can be seen from the above, Figure 7 As shown in the front view of the electronic device 100, Figure 6 As shown in the partial enlarged view of region II of the electronic device 100. As can be seen from the above, Figure 4-7 As can be seen from the above, in the electronic device 100, whether the light-transmitting cover plate 2 is kept in the four-curved surface shape or is provided with a missing corner at the edge corner position, since the flexible display panel 1 is provided with a missing corner at the edge corner position, there is a large area (such as the approximately crescent-shaped region B) at the edge corner position of the front of the electronic device 100 that cannot be used for display, which leads to the fact that the screen-to-body ratio of the electronic device cannot be further improved, and the information carrying efficiency of the display region is low.

[0078] In order to solve the above problems, please refer to Figure 8-11 , Figure 8 As shown in the perspective view of the flexible display panel 1 provided by some embodiments of the present application; Figure 9 As shown in the cross-sectional view of the flexible display panel 1 at the A-A line, Figure 8 As shown in the cross-sectional view of the flexible display panel 1 at the B-B line; Figure 10 As shown in the cross-sectional view of the flexible display panel 1 at the C-C line. The difference between the flexible display panel 1 shown in the embodiment and the flexible display panel 1 shown in Figure 8 As shown in the cross-sectional view of the flexible display panel 1 at the B-B line; Figure 11 As shown in the cross-sectional view of the flexible display panel 1 at the C-C line. The difference between the flexible display panel 1 shown in the embodiment and the flexible display panel 1 shown in Figure 8 As shown in the cross-sectional view of the flexible display panel 1 at the C-C line. The difference between the flexible display panel 1 shown in the embodiment and the flexible display panel 1 shown in Figure 2 As shown in the cross-sectional view of the flexible display panel 1 at the C-C line. The difference between the flexible display panel 1 shown in the embodiment and the flexible display panel 1 shown in

[0079] The main view part 11 is the main part for a user to view the flexible display panel 1. Based on this, the main view part 11 is located in the middle of the flexible display panel 1, and has a larger area relative to the first side view part 12, the second side view part 13 and the third side view part 14, so as to provide the user with the picture and information presented by the flexible display panel 1.

[0080] The main view part 11 is in the shape of a planar sheet, and the shape of the main view part 11 is approximately rectangular. Of course, the shape of the main view part 11 can also be square, triangular, prismatic, polygonal, etc., and the embodiments of the present application take the shape of the main view part 11 as approximately rectangular as an example for description, which cannot be considered as a special limitation to the present application.

[0081] The main viewing portion 11 includes a display surface 11a and a back surface 11b. The display surface 11a is a surface on which the main viewing portion 11 presents pictures and information. The back surface 11b is opposite to the display surface 11a.

[0082] The first side viewing portion 12, the second side viewing portion 13 and the third side viewing portion 14 are secondary portions of the flexible display panel 1 for a user to view, and are arranged at edges of the main viewing portion 11. Specifically, the main viewing portion 11 has a middle portion and edges, and the edges of the main viewing portion 11 include a first segment 112, a second segment 113 and a corner segment 111.

[0083] In some embodiments, referring to Figure 8 , the first segment 112 extends along the Y-axis direction, the second segment 113 extends along the X-axis direction, and the first segment 112 and the second segment 113 are two straight line segments perpendicular to each other, that is, the angle between the extension line of the first segment 112 and the extension line of the second segment 113 is approximately equal to 90°. Of course, when the shape of the main viewing portion 11 is triangular, prismatic or polygonal, the angle between the extension line of the first segment 112 and the extension line of the second segment 113 can also be less than 90° or greater than 90°. The present application is described by taking the angle between the extension line of the first segment 112 and the extension line of the second segment 113 as approximately equal to 90°, which cannot be considered as a special limitation to the present application.

[0084] In some embodiments, referring to Figure 8 , the length of the first segment 112 can be greater than the length of the second segment 113, that is, the first segment 112 is the long side of the main viewing portion 11, and the second segment 113 is the short side of the main viewing portion 11. In other embodiments, the length of the first segment 112 can also be less than or equal to the length of the second segment 113. The present application is described by taking the length of the first segment 112 greater than the length of the second segment 113, which cannot be considered as a special limitation to the present application.

[0085] The corner segment 111 is connected between the first segment 112 and the second segment 113. Optionally, the corner segment 111 can be a transition arc connected between the first segment 112 and the second segment 113. In this way, the edges of the main viewing portion 11 are smoothly transitioned, and the first side viewing portion 12, the third side viewing portion 14 and the second side viewing portion 13 arranged at the edges of the main viewing portion 11 can be smoothly transitioned in sequence, preventing damage to the flexible display panel 1 due to excessive bending angles between the first side viewing portion 12 and the third side viewing portion 14, between the third side viewing portion 14 and the second side viewing portion 13, and inside the third side viewing portion 14.

[0086] The first side viewing portion 12, the second side viewing portion 13 and the third side viewing portion 14 are all curved relative to the main viewing portion 11, and overall present a smoothly transitioned arc surface shape. Specifically, referring to Figure 8-11The first side view part 12 extends from a first section 112 of the edge of the main view part 11 away from the middle part of the main view part 11 and is bent towards the back side of the main view part 11. The back side of the main view part 11 refers to the side of the back surface 11b of the main view part 11 away from the display surface 11a, and the first side view part 12 is bent towards the back side, that is, the normal direction of each part of the first side view part 12 gradually inclines towards the back side of the main view part 11 from the end close to the main view part 11 to the end away from the main view part 11. The second side view part 13 extends from a second section 113 of the edge of the main view part 11 away from the middle part of the main view part 11 and is bent towards the back side of the main view part 11. The third side view part 14 is connected between the first side view part 12 and the second side view part 13, and the third side view part 14 extends from a corner section 111 of the edge of the main view part 11 away from the middle part of the main view part 11 and is bent towards the back side of the main view part 11.

[0087] In this way, the flexible display panel 1 is provided with a curved surface shape in the side part, the top part or the bottom part and is also provided with a curved surface shape in the edge corner part. When the flexible display panel 1 is applied to the electronic device 100, there is no need to form an angle on the middle frame 20, so that the processing difficulty of the middle frame 20 can be reduced. At the same time, the flexible display panel 1 is not only provided in the curved surface shape of the side part, the top part or the bottom part of the light-transmitting cover plate 2, but also provided in the curved surface shape of the edge corner position of the light-transmitting cover plate 2, so that the black border width of the front corner position of the electronic device 100 can be consistent with the black border width of the side part, the top part or the bottom part, and the appearance effect of the front of the electronic device 100 is ensured. At the same time, the screen ratio of the electronic device 100 can be further increased, the information carrying efficiency of the display area is improved, and the product competitiveness is improved.

[0088] On the basis of the above-mentioned embodiments, in order to avoid wrinkles of the flexible display panel 1, in some embodiments, please refer to Figure 12 and Figure 13 , Figure 12 for Figure 8 the partial enlarged view of the region III of the flexible display panel 1 shown in Figure 13 and Figure 12 , the edge of the first side view part 12 away from the main view part 11 is the outer contour of the first side view part 12, which is represented as E2 in Figure 12 and Figure 13 . The edge of the second side view part 13 away from the main view part 11 is the outer contour of the second side view part 13, which is represented as E3 in Figure 12 and Figure 13 . The edge of the third side view part 14 away from the main view part 11 is the outer contour of the third side view part 14, which is represented as E4 in Figure 12 and Figure 13The middle part of the outer contour E1 of the third side view part 14 is curved towards the main view part 11 in a direction perpendicular to the main view part 11.

[0089] Specifically, please refer to Figure 13 , one end of the outer contour E1 of the third side view part 14 is connected with the outer contour E2 of the first side view part 12, and the intersection point is a1. The other end of the outer contour E1 of the third side view part 14 is connected with the outer contour E3 of the second side view part 13, and the intersection point is a2. The outer contour E1 has a highest point a3 curved towards the main view part 11. The middle part of the outer contour E1 of the third side view part 14 is curved towards the main view part 11 in a direction perpendicular to the main view part 11 (i.e. the Z-axis direction), that is, the vertical distance from at least the highest point a3 to the display surface 11a of the main view part 11 is greater than the vertical distance from the intersection point a1 to the display surface 11a of the main view part 11, and the vertical distance from the highest point a3 to the display surface 11a of the main view part 11 is also greater than the vertical distance from the intersection point a2 to the display surface 11a of the main view part 11.

[0090] In this way, the part of the third side view part 14 between the curved part of the middle part of the outer contour E1 and the corner segment 111 forms a redundant part of the edge corner part of the flexible display panel 1, and the redundant part is in an unfolded state and does not generate wrinkles, so as not to affect the display effect of the electronic device when the flexible display panel 1 is applied to the electronic device.

[0091] In some embodiments, please refer to Figure 13 , the outer contour E1 and the outer contour E2, the outer contour E1 and the outer contour E3, and the parts in the outer contour E1 are smoothly transitioned. It can be understood that when a user holds a mobile phone or other electronic device, the front of the electronic device is the main observation area of the user. The overall contour of the front of the electronic device is mainly affected by the contour of the internal display panel, and accordingly, the structure of the middle frame is also determined according to the shape of the display screen. In addition, this is particularly true for electronic devices that pursue higher screen-to-body ratios (such as narrow-bezel design or full-screen design). In this regard, the flexible display panel 1 in the embodiments of the present application smoothly transitions the outer contour E1 and the outer contour E2, the outer contour E1 and the outer contour E3, and the parts in the outer contour E1, so that when the flexible display panel 1 is applied in the electronic device 100, the front of the electronic device 100 does not have unnatural gaps or recesses in the edge corner area, so as to be more in line with the user's usage habits.

[0092] In some embodiments, please refer to Figure 14 , Figure 14 , the outer contour E1 and the outer contour E2, the outer contour E1 and the outer contour E3, and the parts in the outer contour E1 are smoothly transitioned. It can be understood that when a user holds a mobile phone or other electronic device, the front of the electronic device is the main observation area of the user. The overall contour of the front of the electronic device is mainly affected by the contour of the internal display panel, and accordingly, the structure of the middle frame is also determined according to the shape of the display screen. In addition, this is particularly true for electronic devices that pursue higher screen-to-body ratios (such as narrow-bezel design or full-screen design). In this regard, the flexible display panel 1 in the embodiments of the present application smoothly transitions the outer contour E1 and the outer contour E2, the outer contour E1 and the outer contour E3, and the parts in the outer contour E1, so that when the flexible display panel 1 is applied in the electronic device 100, the front of the electronic device 100 does not have unnatural gaps or recesses in the edge corner area, so as to be more in line with the user's usage habits. Figure 13The first side view part 12, the second side view part 13 and the third side view part 14 of the flexible display panel 1 are shown in the schematic diagram of the orthographic projection of the display surface 11a of the front view part 11. The outer contour E2 of the first side view part 12 is the first projection E21 in the orthographic projection of the display surface 11a of the front view part 11. The outer contour E3 of the second side view part 13 is the second projection E31 in the orthographic projection of the display surface 11a of the front view part 11. The outer contour E1 of the third side view part 14 is the third projection E11 in the orthographic projection of the display surface 11a of the front view part 11. The third projection E11 is a transition arc connected between the first projection E21 and the second projection E31, and the center of the transition arc is O. In this way, when the flexible display panel 1 is applied to an electronic device such as a mobile phone, the edge corner of the front of the electronic device is in a rounded form, which can ensure the aesthetics and is more in line with the user's usage habits.

[0093] In some embodiments, please refer to Figure 14 , the orthographic projection of the third side view part 14 on the display surface 11a of the front view part 11 is the fourth projection E, and the intersection K of the extension line of the first section 112 and the second section 113 is located in the fourth projection E. In this way, the area of the third side view part 14 is larger, and the orthographic projection area of the display surface 11a is larger, which can improve the screen-to-body ratio of the electronic device 100.

[0094] In some embodiments, please refer to Figure 15 , Figure 15 is Figure 14 The cross-sectional view of the flexible display panel 1 at the section L is shown. The section L is perpendicular to the plane of the front view part 11 and passes through the highest point a3 of the outer contour E1 and the center O of the third projection E11. The height of the third side view part 14 in the direction perpendicular to the front view part 11 (i.e., the Z-axis direction) is h, which is greater than 0 millimeters (mm). Specifically, h is greater than or equal to 0.05 mm and less than or equal to 0.25 mm. In this way, the flexible display panel 1 has a moderate redundancy in the third side view part 14, which can prevent the flexible display panel 1 from being wrinkled as much as possible while maintaining the curved form of the flexible display panel 1.

[0095] In some embodiments, please refer to Figure 16 , Figure 16 is Figure 8A structural schematic diagram of the flexible display screen 1 is shown. In the embodiment, the number of the first side view parts 12 and the second side view parts 13 is two. The two first side view parts 12 are respectively arranged at opposite edges of the main view part 11, and the two second side view parts 13 are respectively arranged at other opposite edges of the main view part 11. The number of the third side view parts 14 is four, and the four third side view parts 14 are respectively arranged at four corner segments of the edge of the main view part 11 and connected between the adjacent first side view part 12 and the second side view part 13. In this way, the flexible display panel 1 is in a four-curved surface form and can match a four-curved light-transmitting cover plate to form a four-curved screen, so that an electronic device with a four-curved screen can be formed, thereby improving the screen ratio and product competitiveness of the electronic device.

[0096] In some embodiments, please refer to Figure 16 , the flexible display panel 1 also has a camera hole 15. When the flexible display panel 1 is applied to an electronic device such as a mobile phone, the camera hole 15 is opposite to the camera of the electronic device, so that the ambient light can pass through the camera hole 15 and enter the camera, thereby realizing the shooting of a photo or a video.

[0097] In some embodiments, please refer to Figure 16 , the flexible display panel 1 is also provided with a circuit connection end 16 at the outer edge of the second side view part 13, and the circuit connection end 16 is used for electrically connecting with a flexible printed circuit (FPC) 17 to transmit pictures and information to the flexible display panel 1 through the FPC 17. In other embodiments, the circuit connection end 16 can also be arranged at the outer edge of the first side view part 12 or the outer edge of the third side view part 14.

[0098] The application also provides a display screen comprising the flexible display panel 1 provided by any of the above embodiments.

[0099] For example, please refer to Figure 17 and Figure 18 , Figure 17 , a structural schematic diagram of the display screen 10 provided by some embodiments of the application is shown, Figure 18 , an exploded view of the display screen 10 shown in Figure 17 . In addition to comprising the flexible display panel 1, the display screen 10 also comprises a light-transmitting cover plate 2. The material of the light-transmitting cover plate 2 includes but is not limited to glass and plastic. The light-transmitting cover plate 2 has an outer surface m1 and an inner surface m2 opposite to the outer surface m1. Please refer to Figure 19 and Figure 20 , Figure 19 , a structural schematic diagram of the outer surface m1 of the light-transmitting cover plate 2 in the display screen 10 shown in Figure 17-18 , a structural schematic diagram of the inner surface m2 of the light-transmitting cover plate 2 in the display screen 10 shown in Figure 20 , a structural schematic diagram of the inner surface m2 of the light-transmitting cover plate 2 in the display screen 10 shown in Figure 17-18A structure diagram of the inner surface m2 of the light-transmitting cover plate 2 in the display screen 10 is shown. When the light-transmitting cover plate 2 is applied to an electronic device, the outer surface m1 of the light-transmitting cover plate 2 faces the outside of the electronic device, and the inner surface m2 of the light-transmitting cover plate 2 faces the inside of the electronic device. The flexible display panel 1 is arranged on the inner side of the light-transmitting cover plate 2. The light-transmitting cover plate 2 is used to protect the flexible display panel 1.

[0100] Please refer to Figure 19 and Figure 20 The light-transmitting cover plate 2 includes a flat plate portion 21, and a first arc piece portion 22, a second arc piece portion 23, and a third arc piece portion 24 arranged at the edges of the flat plate portion 21.

[0101] In some embodiments, the shape of the flat plate portion 21 is substantially rectangular. In other embodiments, the shape of the flat plate portion 21 can also be square, triangular, prismatic, polygonal, etc. The embodiments of the present application are described by taking the flat plate portion 21 as an example, which is substantially rectangular, and this cannot be considered as a special limitation to the present application.

[0102] The flat plate portion 21 includes a central portion and edges, and the edges of the flat plate portion 21 include a first edge 212, a second edge 213, and a corner edge 211.

[0103] The first arc piece portion 22, the second arc piece portion 23, and the third arc piece portion 24 are all curved relative to the flat plate portion 21, and have an overall shape of a smoothly transitioned arc.

[0104] Specifically, please refer to Figure 19 and Figure 20 The first arc piece portion 22 extends away from the central portion of the flat plate portion 21 from the first edge 212 of the flat plate portion 21, and is curved towards the inner side of the flat plate portion 21. The second arc piece portion 23 extends away from the central portion of the flat plate portion 21 from the second edge 213 of the flat plate portion 21, and is curved towards the inner side of the flat plate portion 21. The third arc piece portion 24 is connected between the first arc piece portion 22 and the second arc piece portion 23, and extends away from the central portion of the flat plate portion 21 from the corner edge 211 of the flat plate portion 21, and is curved towards the inner side of the flat plate portion 21.

[0105] In this way, the inner surface 22 of the light-transmitting cover plate 2 is provided with an arc surface modeling at the side portion, the top portion, or the bottom portion, and is also provided with an arc surface modeling at the edge corner portion, which can be adapted to the flexible display panel 1.

[0106] Specifically, please refer to Figure 18The main viewing portion 11 of the flexible display panel 1 is stacked with the flat portion 21 of the light-transmitting cover plate 2, with the display surface 11a of the main viewing portion 11 facing the flat portion 21, and the flat portion 21 adapting to the main viewing portion 11. The first side viewing portion 12 of the flexible display panel 1 is stacked with the first arc-shaped portion 22 of the light-transmitting cover plate 2, and the first arc-shaped portion 22 adapting to the first side viewing portion 12. The second side viewing portion 13 of the flexible display panel 1 is stacked with the second arc-shaped portion 23 of the light-transmitting cover plate 2, and the second arc-shaped portion 23 adapting to the second side viewing portion 13. The third side viewing portion 14 of the flexible display panel 1 is stacked with the third arc-shaped portion 24 of the light-transmitting cover plate 2, and the third arc-shaped portion 24 adapting to the third side viewing portion 14. In this way, the light-transmitting cover 2 is compatible with the flexible display panel 1, and the flexible display panel 1 can form curved shapes on both sides, top or bottom by attaching it to the inner surface 22 of the light-transmitting cover 2.

[0107] Based on the above embodiments, in order to further adapt the third arc-shaped portion 24 to the third side-view portion 14 of the flexible display panel 1, in some embodiments, please refer to... Figure 21 , Figure 21 for Figure 19 The diagram shows the structure of the light-transmitting cover 2 as viewed from direction F. The edge of the first arc-shaped portion 22 furthest from the flat plate portion 21 is the outer contour of the first arc-shaped portion 22. Figure 21 The middle part is represented as e2. The edge of the second arc-shaped portion 23 that is away from the flat plate portion 21 is the outer contour of the second arc-shaped portion 23. Figure 21 The third arc plate portion 24, located away from the flat plate portion 21, forms the outer contour of the third arc plate portion 24. Figure 21 The outer contour e1 of the third arc plate portion 24 is connected at both ends to the outer contour e2 of the first arc plate portion 22 and the outer contour e3 of the second arc plate portion 23, respectively. The middle part of the outer contour e1 of the third arc plate portion 24 is raised close to the flat plate portion 21 in a direction perpendicular to the flat plate portion 21.

[0108] For details, please refer to the following: Figure 21 One end of the outer contour e1 of the third arc-shaped portion 24 connects with the outer contour e2 of the first arc-shaped portion 22, and the intersection point is A1. The other end of the outer contour e1 of the third arc-shaped portion 24 connects with the outer contour e3 of the second arc-shaped portion 23, and the intersection point is A2. The outer contour e1 has a highest point A3 that is raised near the flat plate portion 21. The middle part of the outer contour e1 of the third arc-shaped portion 24 is raised near the flat plate portion 21 in a direction perpendicular to the flat plate portion 21. That is, at least the vertical distance from the highest point A3 of the outer contour e1 to the outer surface of the flat plate portion 21 is greater than the vertical distance from the intersection point A1 to the outer surface of the flat plate portion 21, and the vertical distance from the highest point A3 to the outer surface of the flat plate portion 21 is also greater than the vertical distance from the intersection point A2 to the outer surface of the flat plate portion 21.

[0109] In this way, the third arc piece 24 is adapted to the third side view part 14, and the fit between the two can be ensured. In other embodiments, the outer contour e1 can not have the raised part, so that the third arc piece 24 is not adapted to the third side view part 14, and the distances from the third arc piece 24 to the third side view part 14 are not equal. In this case, the gap between the third arc piece 24 and the third side view part 14 can be filled with a liquid light-transmissive adhesive (such as OCA adhesive) that is not fixed in shape. The liquid light-transmissive adhesive has fluidity and can flow from an area with a smaller gap to an area with a larger gap, so as to maintain the shapes of the third arc piece 24 and the third side view part 14.

[0110] In some embodiments, the outer contour e1 and the outer contour e2, the outer contour e1 and the outer contour e3, and the parts in the outer contour e1 are smoothly connected. In this way, the edges of the light-transmissive cover plate 2 are smoothly connected, unnatural gaps or recesses are avoided, and the use habits of users are better met.

[0111] In some embodiments, the outer contour e2 is a fifth projection in the orthographic projection of the outer surface of the flat plate part 21, the outer contour e3 is a sixth projection in the orthographic projection of the outer surface of the flat plate part 21, and the outer contour e1 is a seventh projection in the orthographic projection of the outer surface of the flat plate part 21. The seventh projection is a transition arc connected between the fifth projection and the sixth projection. In this way, when the light-transmissive cover plate 2 is applied to an electronic device, the edge corner part of the light-transmissive cover plate 2 appears as a rounded corner on the front surface of the electronic device, the appearance is beautiful, and the use habits of users are better met.

[0112] In some embodiments, the third arc piece 24 is an eighth projection in the orthographic projection of the outer surface of the flat plate part 21, and the intersection of the extension line of the first edge 212 and the extension line of the second edge 213 is located in the eighth projection. In this way, the area of the third arc piece 24 is large, and the third side view part 14 can be covered to effectively protect the third side view part 14.

[0113] In some embodiments, please refer back to Figure 20There are two first arc-shaped portions 22 and two second arc-shaped portions 23. The two first arc-shaped portions 22 are respectively disposed on opposite sides of the flat panel 21, and the two second arc-shaped portions 23 are respectively disposed on the other opposite sides of the flat panel 21. The two first side-view portions 12 of the flexible display panel 1 are stacked with the two first arc-shaped portions 22, and the two first arc-shaped portions 22 are adapted to the two first side-view portions 12 of the flexible display panel 1. The two second side-view portions 13 of the flexible display panel 1 are stacked with the two second arc-shaped portions 23, and the two second arc-shaped portions 23 are adapted to the two second side-view portions 13 of the flexible display panel 1. There are four third arc-shaped portions 24, which are respectively disposed at the four corner edges of the flat panel 21 and connected between adjacent first arc-shaped portions 22 and second arc-shaped portions 23. The four third side-view portions 14 of the flexible display panel 1 are respectively stacked with the four third arc-shaped portions 24, and the four third arc-shaped portions 24 are respectively adapted to the four third side-view portions 14 of the flexible display panel 1. In this way, the light-transmitting cover plate 2 can cover the two first side-view portions 12, the two second side-view portions 13 and the four third side-view portions 14 of the flexible display panel 1, so as to effectively protect the flexible display panel 1.

[0114] In some embodiments, please refer to Figure 22 , Figure 22 for Figure 19 The image shows a cross-sectional view of the light-transmitting cover plate 2 at line DD. The thickness of the first arc-shaped portion 22 gradually decreases from one end connecting to the flat plate portion 21 to the outer contour of the first arc-shaped portion 22. It should be noted that the thickness of each part of the arc-shaped portion (such as the first arc-shaped portion 22) described in this embodiment and in the embodiments below refers to the distance from the inner surface of that part of the arc-shaped portion along the normal direction of the inner surface to the outer surface. In this way, while the inner surface of the first arc-shaped portion 22 is adapted to the first side view portion 12 of the flexible display panel 1, the curvature of the outer surface of the first arc-shaped portion 22 is larger, which allows the image viewed by the user to be closer to a 3D effect.

[0115] In the above embodiments, it should be noted that the inner surface of the first arc-shaped portion 22 refers to the surface of the first arc-shaped portion 22 facing the interior of the electronic device when the light-transmitting cover 2 is applied to the electronic device. Correspondingly, the outer surface of the first arc-shaped portion 22 refers to the surface of the first arc-shaped portion 22 facing the exterior of the electronic device when the light-transmitting cover 2 is applied to the electronic device.

[0116] In some embodiments, the processing of the first arc-shaped portion 22 described above can be as follows: First, the edge portion of the planar light-transmitting cover plate is bent by hot pressing to form an arc-shaped portion of uniform thickness; then, a portion of the material on the outer surface of the arc-shaped portion of uniform thickness is removed using a computerized numerical control (CNC) machine to form a first arc-shaped portion 22 with gradually decreasing thickness. This forming process is simple and has low cost.

[0117] In some embodiments, please refer to... Figure 22 The length L1 of the first arc-shaped portion 22 in the direction parallel to and perpendicular to the first side 212 of the flat plate portion 21 is less than or equal to 6 mm. Optionally, L1 can be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, or 6 mm, etc. In this way, when the light-transmitting cover 2 is applied to an electronic device, the area occupied by the first arc-shaped portion 22 on the front of the electronic device is small. Under the premise of a fixed display area, the area of ​​the flat plate portion 21 can be set to be larger, allowing users to view more images or information displayed on the flexible display panel 1 from the flat plate portion 21, thereby reducing visual errors.

[0118] In some embodiments, please refer to... Figure 22 The height H1 of the first arc-shaped portion 22 in the direction perpendicular to the flat plate portion 21 is less than or equal to 3.5 mm. Optionally, H1 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, or 3.5 mm, etc. Since the height H1 of the first arc-shaped portion 22 affects the height of the light-transmitting cover 2, the height of the light-transmitting cover 2, when applied to electronic devices, also affects the thickness of the electronic devices. Therefore, when the height H1 of the first arc-shaped portion 22 is less than or equal to 3.5 mm, a smaller height H1 is beneficial for the thinning of the electronic device.

[0119] In some embodiments, please refer to... Figure 22 The edge of the inner surface of the first arc-shaped portion 22 that is away from the inner surface of the flat plate portion 21 is the outer edge of the inner surface of the first arc-shaped portion 22. The angle θ1 between the tangent plane at the outer edge of the inner surface of the first arc-shaped portion 22 and the outer surface of the flat plate portion 21 is less than or equal to 89°. Optionally, the angle θ1 can be 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, or 89°, etc. In this way, the image viewed by the user is closer to a 3D effect.

[0120] In some embodiments, please refer to... Figure 22The radius of curvature R1 of the inner surface of the first arc-shaped portion 22 is greater than or equal to 2.5 mm. Optionally, the radius of curvature R1 can be 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc. In this way, the radius of curvature R1 of the inner surface of the first arc-shaped portion 22 is relatively large, and when the planar light-transmitting cover plate is bent by hot pressing to form the first arc-shaped portion 22, the bending angle is smaller, which can ensure the forming yield of the first arc-shaped portion 22. The radius of curvature R1 of each part of the inner surface of the first arc-shaped portion 22 can be the same or different, and no specific limitation is made in this embodiment.

[0121] In some embodiments, please refer to Figure 23 , Figure 23 for Figure 19 The image shows a cross-sectional view of the light-transmitting cover 2 along line EE. The thickness of the second arc-shaped portion 23 gradually decreases from one end connecting to the flat plate portion 21 to the outer contour of the second arc-shaped portion 23. In this way, while the inner surface of the second arc-shaped portion 23 is adapted to the second side view portion 13 of the flexible display panel 1, the curvature of the outer surface of the second arc-shaped portion 23 is greater, allowing the image viewed by the user to be closer to a 3D effect.

[0122] In the above embodiments, it should be noted that the inner surface of the second arc-shaped portion 23 refers to the surface of the second arc-shaped portion 23 facing the interior of the electronic device when the light-transmitting cover 2 is applied to the electronic device. Correspondingly, the outer surface of the second arc-shaped portion 23 refers to the surface of the second arc-shaped portion 23 facing the exterior of the electronic device when the light-transmitting cover 2 is applied to the electronic device.

[0123] In some embodiments, the second arc plate portion 23 can also be formed by hot pressing combined with CNC machining to reduce the forming difficulty and processing cost of the second arc plate portion 23.

[0124] In some embodiments, please refer to... Figure 23 The length L2 of the second arc-shaped portion 23 in the direction parallel to and perpendicular to the second side 213 of the flat plate portion 21 is less than or equal to 6 mm. Optionally, L2 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm, etc. In this way, when the light-transmitting cover 2 is applied to an electronic device, the second arc-shaped portion 23 occupies a small area on the front of the electronic device. Under the premise of a fixed display area, the area of ​​the flat plate portion can be set to be larger, allowing users to view more information or images displayed on the flexible display panel 1 from the flat plate portion and reducing visual errors.

[0125] In some embodiments, please refer to Figure 23The height H2 of the second arc-shaped portion 23 in the direction perpendicular to the flat plate portion 21 is less than or equal to 1.5 mm. Optionally, H2 can be 0.5 mm, 0.8 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm, etc. When the light-transmitting cover 2 is applied to an electronic device, the outer edge of the second arc-shaped portion 23 covers the top or bottom edge of the frame of the middle frame. Based on this, since the height H2 of the second arc-shaped portion 23 is less than or equal to 1.5 mm, the height H2 is relatively small. Given a certain thickness of the electronic device, the thickness of the frame of the middle frame can be designed to be larger, so as to facilitate the placement of structures such as USB interfaces, sound holes, and headphone jacks on the top and bottom edges of the frame.

[0126] In some embodiments, please refer to Figure 23 The edge of the inner surface of the second arc-shaped portion 23 that is away from the inner surface of the flat plate portion 21 is the outer edge of the inner surface of the second arc-shaped portion 23. The angle θ2 between the tangent plane at the outer edge of the inner surface of the second arc-shaped portion 23 and the outer surface of the flat plate portion 21 is less than or equal to 89°. Optionally, the angle θ2 can be 10°, 20°, 25°, 30°, 35°, 40°, 45°, or 50°, etc. In this way, the image viewed by the user is closer to a 3D effect.

[0127] In some embodiments, please refer to Figure 23 The radius of curvature R2 of the inner surface of the second arc-shaped portion 23 is greater than or equal to 2.5 mm. Optionally, the radius of curvature R2 can be 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc. In this way, the radius of curvature R2 of the inner surface of the second arc-shaped portion 23 is relatively large, and when the planar light-transmitting cover plate is bent by means of hot pressing or other methods to form the second arc-shaped portion 23, the bending angle is smaller, which can ensure the molding yield of the second arc-shaped portion 23. The radius of curvature R2 of each part of the inner surface of the second arc-shaped portion 23 can be the same or different, and no specific limitation is made in this embodiment.

[0128] In some embodiments, please refer to Figure 24 , Figure 24 for Figure 19 The image shows a cross-sectional view of the light-transmitting cover 2 at line GG. The thickness of the third arc-shaped portion 24 gradually decreases from one end connecting to the flat plate portion 21 to the outer contour of the third arc-shaped portion 24. In this way, while the inner surface of the third arc-shaped portion 24 is adapted to the third side view portion 14 of the flexible display panel 1, the curvature of the outer surface of the third arc-shaped portion 24 is greater, allowing the image viewed by the user to more closely resemble a 3D effect.

[0129] In some embodiments, the third arc plate portion 24 can also be formed by hot pressing combined with CNC machining to reduce the forming difficulty and processing cost of the third arc plate portion 24.

[0130] In some embodiments, please refer to Figure 24 , the height H3 of the third arc segment 24 in the direction perpendicular to the flat plate 21 is greater than or equal to 1 mm and less than or equal to 2 mm. In this way, the height H3 of the third arc segment is moderate, which can avoid the middle part of the outer edge of the third arc segment from being raised too much to affect the 3D display effect of the electronic device.

[0131] Please refer to Figure 17 , the display screen 10 further comprises a polarizer 3. The polarizer 3 is arranged on the display surface of the flexible display panel 1, and the polarizer 3 is arranged to have the same shape as the surface of the flexible display panel 1 to be attached to the flexible display panel 1 without gaps and wrinkles, thereby forming a display panel with a polarizer.

[0132] Please refer to Figure 17 , the display screen 10 further comprises a light-transmitting adhesive layer 4. The light-transmitting adhesive layer 4 is arranged between the polarizer 3 and the light-transmitting cover plate 2, and the light-transmitting adhesive layer 4 includes but is not limited to a transparent adhesive such as an optically clear adhesive (OCA), which is used to bond the above-mentioned display panel with a polarizer to the inner surface 22 of the light-transmitting cover plate 2. When the inner surface 22 of the light-transmitting cover plate 2 does not match the shape of the flexible display panel 1, since the light-transmitting adhesive layer 4 has a certain flowability, when the display panel with a polarizer is attached to the inner surface 22 of the light-transmitting cover plate 2, the attachment pressure can be adjusted to make the light-transmitting adhesive layer 4 flow from the small gap part to the large gap part, thereby making the flexible display panel 1 form a four-curved surface without wrinkles.

[0133] The present application also provides an electronic device, which is a type of electronic device with display function. Specifically, the electronic device includes but is not limited to a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a personal computer, a notebook computer, a vehicle-mounted device, and a wearable device such as a watch.

[0134] Please refer to Figure 25 , Figure 25A structural schematic diagram of an electronic device 100 is provided for some embodiments of the present application. In the present embodiment, the electronic device 100 is a mobile phone. Specifically, the electronic device 100 includes a display screen 10, a middle frame 20, a back cover (not shown in the figure) and a circuit board (not shown in the figure). The display screen 10 is the display screen 10 described in the above embodiments. The display screen 10, the middle frame 20 and the back cover are connected in sequence. The middle frame 20 and the back cover form an internal accommodating space of the electronic device 100, and the circuit board is arranged in the internal accommodating space. In some embodiments, the circuit board is a main board of the mobile phone, and in other embodiments, the circuit board can also be a secondary board of the mobile phone. The circuit board is electrically connected with the flexible display panel of the display screen 10 to transmit images or information to the flexible display panel.

[0135] Since the electronic device provided by the embodiments of the present application includes the display screen 10 described in the above embodiments, the electronic device can realize four-curved surface display, has a large screen-to-body ratio, and has better product competitiveness.

[0136] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0137] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display screen, characterized in that, include: Translucent cover plate; A flexible display panel is disposed inside the light-transmitting cover plate. The flexible display panel includes a main viewing portion and a first side viewing portion, a second side viewing portion, and a third side viewing portion disposed at the edge of the main viewing portion. The main viewing area includes a center and an edge, and the edge of the main viewing area includes a first segment, a second segment, and a corner segment connecting the first segment and the second segment; the main viewing area includes a display surface and a back surface opposite to the display surface; The first side view portion extends from the middle of the first segment away from the main view portion and bends toward the rear side; the second side view portion extends from the middle of the second segment away from the main view portion and bends toward the rear side; the third side view portion connects the first side view portion and the second side view portion, and the third side view portion extends from the middle of the corner segment away from the main view portion and bends toward the rear side. The two ends of the outer contour of the third side view are respectively connected to the outer contours of the first side view and the second side view. The middle part of the outer contour of the third side view is raised close to the main view along a direction perpendicular to the main view to form the highest point of the outer contour of the third side view. The vertical distance from the highest point to the display surface of the main view is greater than the vertical distance from the intersection of the outer contours of the third side view and the first side view to the display surface of the main view.

2. The display screen according to claim 1, characterized in that, The orthographic projection of the outer contour of the first side view portion onto the display surface is the first projection; the orthographic projection of the outer contour of the second side view portion onto the display surface is the second projection; the orthographic projection of the outer contour of the third side view portion onto the display surface is the third projection, and the third projection is a transition arc connecting the first projection and the second projection.

3. The display screen according to claim 1, characterized in that, The orthographic projection of the third side view onto the display surface is a fourth projection, and the intersection of the long line of the first segment and the extension line of the second segment is located within the fourth projection.

4. The display screen according to claim 1, characterized in that, The height of the third side view portion in the direction perpendicular to the main view portion is greater than or equal to 0.05 mm and less than or equal to 0.25 mm.

5. The display screen according to claim 1, characterized in that, Both the first segment and the second segment are straight line segments, and the first segment is perpendicular to the second segment.

6. The display screen according to claim 1, characterized in that, The corner segment is a transition arc connecting the first segment and the second segment.

7. The display screen according to claim 1, characterized in that, The length of the first segment is greater than the length of the second segment.

8. The display screen according to any one of claims 1-7, characterized in that, The light-transmitting cover plate includes a flat plate portion and a first arc plate portion, a second arc plate portion and a third arc plate portion disposed on the edge of the flat plate portion; the flat plate portion includes a middle portion and an edge, and the edge of the flat plate portion includes a first side, a second side and a corner side connecting the first side and the second side; The first arc-shaped portion extends from the middle of the first side away from the flat plate portion and bends inward toward the flat plate portion; the second arc-shaped portion extends from the second side away from the middle of the flat plate portion and bends inward toward the flat plate portion; the third arc-shaped portion connects the first arc-shaped portion and the second arc-shaped portion, and the third arc-shaped portion extends from the corner side away from the middle of the flat plate portion and bends inward toward the flat plate portion. The main viewing portion of the flexible display panel is stacked with the flat plate portion, and the display surface of the main viewing portion faces the flat plate portion. The first side viewing portion of the flexible display panel is stacked with the first arc plate portion. The second side viewing portion of the flexible display panel is stacked with the second arc plate portion. The third side viewing portion of the flexible display panel is stacked with the third arc plate portion. One end of the outer contour of the third arc plate is connected to and smoothly transitions with the outer contour of the first arc plate portion, and the other end of the outer contour of the third arc plate portion is connected to and smoothly transitions with the outer contour of the second arc plate portion.

9. The display screen according to claim 8, characterized in that, The middle part of the outer contour of the third arc plate portion is raised close to the plate portion in a direction perpendicular to the plate portion.

10. The display screen according to claim 8, characterized in that, The thickness of the first arc plate portion, the second arc plate portion, and the third arc plate portion gradually decreases from the end connected to the flat plate portion to the outer contour portion.

11. The display screen according to claim 8, characterized in that, The length of the first arc plate portion in the direction parallel to the flat plate portion and perpendicular to the first side, and the length of the second arc plate portion in the direction parallel to the flat plate portion and perpendicular to the second side, are both less than or equal to 6 mm.

12. The display screen according to claim 8, characterized in that, The height of the first arc-shaped portion in the direction perpendicular to the flat plate portion is less than or equal to 3.5 mm.

13. The display screen according to claim 8, characterized in that, The height of the second arc-shaped portion in the direction perpendicular to the flat plate portion is less than or equal to 1.5 mm.

14. The display screen according to claim 8, characterized in that, The angle between the tangent plane at the outer edge of the inner surface of the first arc plate portion and the outer surface of the flat plate portion, and the angle between the tangent plane at the outer edge of the inner surface of the second arc plate portion and the outer surface of the flat plate portion are both less than or equal to 89°.

15. The display screen according to claim 8, characterized in that, The radius of curvature of the inner surface of the first arc plate and the radius of curvature of the inner surface of the second arc plate are both greater than or equal to 2.5 mm.

16. The display screen according to claim 8, characterized in that, The height of the third arc plate portion in the direction perpendicular to the flat plate portion is greater than or equal to 1 mm and less than or equal to 2 mm.

17. An electronic device, characterized in that, Includes the display screen, mid-frame, back cover, and circuit board as described in any one of claims 1-16; The display screen, the mid-frame, and the circuit board are connected in sequence. The mid-frame and the back cover form an internal accommodating space for the electronic device. The circuit board is disposed within the internal accommodating space and is electrically connected to the flexible display panel of the display screen.

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