Flexible display panel and display device

Abstract

An embodiment of the present application provides a flexible display panel and a display device, wherein the flexible display panel includes a base substrate and a plurality of island portions located on one side of the base substrate, wherein at least one pixel unit is provided on the island portion; a plurality of first connecting lines and a plurality of second connecting lines, wherein the plurality of first connecting lines and the plurality of second connecting lines connect adjacent island portions, the plurality of first connecting lines are located on one side of the base substrate and are arranged parallel to each other, the plurality of second connecting lines are located on one side of the base substrate and are arranged parallel to each other, two adjacent first connecting lines and two adjacent second connecting lines intersect to define an island portion, and a hollow area is provided between the island portion and the adjacent first connecting lines and / or second connecting lines, the plurality of first connecting lines and the plurality of second connecting lines have a plurality of overlapping areas, in some overlapping areas, the first connecting line is located on the side of the second connecting line away from the base substrate, and in another partial overlapping area, the first connecting line is located on the side of the second connecting line close to the base substrate.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a flexible display panel and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) flexible display panels are widely used in display devices such as mobile phones, computers, and wearable devices due to their advantages such as lightness, low power consumption, fast response, high clarity, bendability, and high luminous efficiency. The stretchability of flexible display panels is a major factor affecting their application scope and scenarios. In related technologies, flexible display panels have a limited stretchability. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a flexible display panel and a display device to increase the stretching range of the flexible display panel. The specific technical solutions are as follows:

[0004] An embodiment of a first aspect of the present application provides a flexible display panel, the flexible display panel comprising:

[0005] A base substrate and a plurality of island portions located on one side of the base substrate, wherein at least one pixel unit is provided on the island portion;

[0006] A plurality of first connecting lines and a plurality of second connecting lines, wherein the plurality of first connecting lines and the plurality of second connecting lines connect adjacent island portions, the plurality of first connecting lines are located on one side of the base substrate and are arranged parallel to each other, the plurality of second connecting lines are located on one side of the base substrate and are arranged parallel to each other, two adjacent first connecting lines and two adjacent second connecting lines intersect to define the island portion, and a hollow area is provided between the island portion and the adjacent first connecting lines and / or second connecting lines, the plurality of first connecting lines and the plurality of second connecting lines have a plurality of overlapping areas, in some overlapping areas, the first connecting line is located on the side of the second connecting line away from the base substrate, and in another partial overlapping area, the first connecting line is located on the side of the second connecting line close to the base substrate.

[0007] In some embodiments, the material of the plurality of first connecting lines includes graphene, and / or the material of the plurality of second connecting lines includes graphene.

[0008] In some embodiments, the plurality of first connecting lines and the plurality of second connecting lines have a plurality of first overlapping regions and a plurality of second overlapping regions, wherein in the plurality of first overlapping regions, the first connecting line is located on a side of the second connecting line away from the base substrate, and in the second overlapping region, the first connecting line is located on a side of the second connecting line close to the base substrate;

[0009] Along the extension direction of the first connecting line, the first overlapping areas and the second overlapping areas are alternately arranged; and / or along the extension direction of the second connecting line, the first overlapping areas and the second overlapping areas are alternately arranged.

[0010] In some embodiments, the flexible display panel further includes at least one barrier structure disposed between the island portion and the hollow area.

[0011] In some embodiments, the pixel unit includes a transistor and a light-emitting unit connected to the transistor;

[0012] The flexible display panel further includes a first data line located on one side of the base substrate, the first data line is electrically connected to transistors of a plurality of pixel units, and the plurality of first connection lines and the second connection line are electrically connected to the first data line.

[0013] In some embodiments, the light-emitting unit includes a first planarization layer, an anode layer, a light-emitting layer, and a cathode layer sequentially arranged in a direction away from the transistor, and the at least one barrier structure is arranged in the same layer as the first planarization layer.

[0014] In some embodiments, the transistor includes an active layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer and a source-drain metal layer located on one side of the substrate, the first gate metal layer includes a first gate, the second gate metal layer includes a second gate, the source-drain metal layer includes a source and a drain, the source and the drain are connected to the active layer vias, the anode layer is connected to the source or drain vias, the first data line is electrically connected to the source or the drain, and the first data line is arranged on the same layer as the source-drain metal layer.

[0015] In some embodiments, a first via structure is provided on the first connection line, and the first data line is electrically connected to the first connection line through the first via structure; and / or the first via structure is provided on the second connection line, and the first data line is electrically connected to the second connection line through the first via structure.

[0016] In some embodiments, at least one first connecting line is electrically connected to at least one second connecting line at the overlapping region.

[0017] An embodiment of the second aspect of the present application provides a display device, characterized in that the display device includes any of the flexible display panels described above.

[0018] Beneficial effects of the embodiments of the present application:

[0019] In the flexible display panel provided in the embodiments of the present application, a plurality of first connecting lines and a plurality of second connecting lines connect adjacent islands, achieving electrical connection between the multiple islands and enabling signal transmission between the adjacent islands. Every two adjacent first connecting lines and every two adjacent second connecting lines are intersecting and collectively define an island. A hollow region is provided between the island and one or two adjacent first connecting lines and / or second connecting lines. When the flexible display panel is stretched by an external force, the first and second connecting lines are stretched, causing the multiple hollow regions surrounding the island to deform, thereby achieving stretching deformation of the flexible display panel without affecting the pixel units on the multiple islands. An overlapping region exists at the intersection of every two intersecting first and second connecting lines, and in the overlapping regions of the plurality of first connecting lines and the plurality of second connecting lines, the first connecting lines are located above the second connecting lines in some overlapping regions, and below the second connecting lines in other overlapping regions. That is, the plurality of first connecting lines and the plurality of second connecting lines are arranged alternately up and down, so that when the plurality of first connecting lines and the plurality of second connecting lines are stretched by an external force, the first connecting lines and the second connecting lines can limit each other, reducing the probability of the first connecting lines and the second connecting lines being misaligned and affecting the pixel units. Furthermore, when the plurality of first connecting lines and the plurality of second connecting lines are stretched by an external force, a small range of displacement can occur between the first connecting lines and the second connecting lines along the extension direction of the first connecting lines and the extension direction of the second connecting lines, thereby increasing the stretching range of the flexible display panel.

[0020] Of course, it is not necessary to achieve all of the advantages described above simultaneously when implementing any product or method of this application. The above description is only an overview of the technical solution of this application. In order to more clearly understand the technical means of this application, it can be implemented in accordance with the contents of the description. In order to make the above and other purposes, features and advantages of this application more obvious and easy to understand, the following specifically describes the specific implementation methods of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A structural diagram of a display panel in some embodiments of the present application;

[0023] Figure 2 for Figure 1 A magnified schematic diagram of the middle area A;

[0024] Figure 3 for Figure 1 A cross-sectional view along the BB direction;

[0025] Figure 4 This is a flow chart of a manufacturing process of a display panel in some embodiments of the present application. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0028] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0029] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0034] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0035] To increase the stretching range of the display panel, the embodiments of the present application provide a flexible display panel and a display device. The flexible display panel and the display device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The display panel may be an electroluminescent display panel or a photoluminescent display panel. In the case where the display panel is an electroluminescent display panel, the electroluminescent display panel may be an OLED (Organic Light-Emitting Diode) or a QLED (Quantum Dot Light Emitting Diodes). In the case where the display panel is a photoluminescent display panel, the photoluminescent display panel may be a quantum dot photoluminescent display panel.

[0036] The embodiment of the first aspect of the present application provides a flexible display panel, such as Figures 1 to 3 As shown, the flexible display panel 100 includes a base substrate 1, multiple islands 2 located on one side of the base substrate 1, multiple first connecting lines 3, and multiple second connecting lines 4. The islands 2 are provided with at least one pixel unit. The multiple first connecting lines 3 and the multiple second connecting lines 4 connect adjacent islands 2. The multiple first connecting lines 3 are located on one side of the base substrate 1 and are arranged parallel to each other. The multiple second connecting lines 4 are located on one side of the base substrate 1 and are arranged parallel to each other. Two adjacent first connecting lines 3 and two adjacent second connecting lines 4 intersect to define an island 2. A hollow region 5 is defined between the island 2 and the adjacent first connecting lines 3 and / or second connecting lines 4. The multiple first connecting lines 3 and the multiple second connecting lines 4 have multiple overlapping regions 31. In some overlapping regions 31, the first connecting lines 3 are located on the side of the second connecting lines 4 away from the base substrate 1. In other overlapping regions 31, the first connecting lines 3 are located on the side of the second connecting lines 4 closer to the base substrate 1.

[0037] In the embodiment of this application, Figure 2 As shown, multiple islands 2 can be arranged in an array. One or more pixel units are provided on each island 2. Optionally, the multiple first connection lines 3 can be perpendicular to the multiple second connection lines 4, and the multiple first connection lines 3 can extend along the row arrangement direction of the multiple islands 2, and the multiple second connection lines 4 can extend along the column arrangement direction of the multiple islands; or the multiple first connection lines 3 can extend along the column arrangement direction of the multiple islands, and the multiple second connection lines 4 can extend along the row arrangement direction of the multiple islands 2. The multiple first connection lines 3 and the multiple second connection lines 4 connect adjacent islands 2, that is, the multiple first connection lines 3 and the multiple second connection lines 4 connect multiple pixel units in adjacent islands 2, thereby realizing signal transmission between the multiple pixel units.

[0038] In the embodiment of the present application, the overlapping region 31 is the intersection area of each first connecting line 3 and each second connecting line 4. In some overlapping regions 31, the first connecting line 3 is located above the second connecting line 4, and in other overlapping regions 31, the first connecting line 3 is located below the second connecting line 4, so that the first connecting lines 3 and the second connecting lines 4 are arranged alternately in an upper and lower manner.

[0039] Optional, such as Figure 2 As shown, the island portion 2 may be substantially rectangular, and hollow areas 5 may be provided around the island portion 2 . The hollow areas 5 are used to provide stretching space for the flexible display panel 100 by deforming themselves.

[0040] Optionally, the base substrate 1 is a flexible base substrate to reduce the probability of the base substrate breaking during the stretching process of the flexible display panel 10. Optionally, the material of the base substrate 1 includes but is not limited to PDMS (Polydimethylsiloxane), PET (Polyethylene terephthalate), PI (Polyimide), PU (Polyurethane), etc.

[0041] In the flexible display panel provided in the embodiment of the present application, a hollow area 5 is provided between the island portion 2 and one or two adjacent first connecting lines 3 and / or second connecting lines 4. When the flexible display panel 100 is stretched by an external force, the first connecting lines 3 and the second connecting lines 4 are stretched, and the multiple hollow areas 5 around the island portion 2 are deformed, thereby achieving tensile deformation of the flexible display panel 100 without affecting the pixel units on the multiple island portions 2. An overlapping region 31 exists at the intersection of every two intersecting first and second connecting lines 3, 4. Furthermore, in the overlapping regions 31 of the first and second connecting lines 3, 4, the first connecting lines 3 are located above the second connecting lines 4 in some overlapping regions 31, while the first connecting lines 3 are located below the second connecting lines 4 in other overlapping regions 31. In other words, the first and second connecting lines 3, 4 are arranged alternately in an up-and-down arrangement. This allows the first and second connecting lines 3, 4 to be mutually restrained when the first and second connecting lines 3, 4 are subjected to external tension, reducing the probability of the first and second connecting lines 3, 4 being misaligned and affecting the pixel units. Furthermore, when the first and second connecting lines 3, 4 are subjected to external tension, a small range of displacement may occur between the first and second connecting lines 3, 4 along the extension directions of the first and second connecting lines 3, 4, thereby increasing the stretching range of the flexible display panel 100.

[0042] In some embodiments, the material of the plurality of first connecting lines 3 includes graphene, and / or the material of the plurality of second connecting lines 4 includes graphene. Graphene has excellent electrical conductivity, good stretchability, and good deformation resistance. Using graphene as the material for the first connecting lines 3 and the second connecting lines 4 ensures good electrical conductivity between the multiple pixel units in adjacent islands 2. This also allows the first connecting lines 3 and the second connecting lines 4 to experience significant deformation during the stretching of the flexible display panel 100, further increasing the stretching range of the flexible display panel 100. This also reduces the probability of the first connecting lines 3 and the second connecting lines 4 breaking during the stretching of the flexible display panel 100, thereby improving the structural stability of the flexible display panel 100.

[0043] Optionally, the material of the plurality of first connecting lines 3 and the plurality of second connecting lines 4 may also be metal, such as copper, aluminum, etc., which is not limited in this application.

[0044] In some embodiments, the plurality of first connecting lines 3 and the plurality of second connecting lines 4 have a plurality of first overlapping regions 311 and a plurality of second overlapping regions 312. In the plurality of first overlapping regions 311, the first connecting lines 3 are located on a side of the second connecting lines 4 away from the substrate 1. In the second overlapping regions 312, the first connecting lines 3 are located on a side of the second connecting lines 4 closer to the substrate 1. Along the extension direction of the first connecting lines 3, the first overlapping regions 311 and the second overlapping regions 312 are alternately arranged; and / or along the extension direction of the second connecting lines 4, the first overlapping regions 311 and the second overlapping regions 312 are alternately arranged.

[0045] In the embodiment of the present application, the first overlapping region 311 and the second overlapping region 312 are both the intersection regions of the first connecting line 3 and the second connecting line 4. In the first overlapping region 311, the first connecting line 3 is located above the second connecting line 4, and in the second overlapping region 312, the first connecting line 3 is located below the second connecting line 4. Along the extension direction of the first connecting line 3, the first overlapping regions 311 and the second overlapping regions 312 are arranged alternately. That is, along the extension direction of the first connecting line 3, the first connecting line 3 and the plurality of second connecting lines 3 have intersection regions, and the two adjacent intersection regions are the first overlapping region 311 and the second overlapping region 312 respectively.

[0046] like Figure 2As shown, there are overlapping areas between the nth first connecting line and the mth to m+5th second connecting lines. The overlapping area between the nth first connecting line and the mth second connecting line is the first overlapping area, the overlapping area between the nth first connecting line and the m+1th second connecting line is the second overlapping area, the overlapping area between the nth first connecting line and the m+3th second connecting line is the first overlapping area, the overlapping area between the nth first connecting line and the m+4th second connecting line is the second overlapping area, the overlapping area between the nth first connecting line and the m+5th second connecting line is the first overlapping area, and so on. Similarly, there is an overlapping area between the mth second connecting line and the nth to n+3th first connecting lines. The overlapping area between the mth second connecting line and the nth first connecting line is the first overlapping area, the overlapping area between the mth second connecting line and the n+1th first connecting line is the second overlapping area, the overlapping area between the mth second connecting line and the n+2th first connecting line is the first overlapping area, and the overlapping area between the mth second connecting line and the n+3th first connecting line is the first overlapping area, and so on, so that the multiple first connecting lines 3 and the multiple second connecting lines 4 are arranged in a woven manner. Since each first connection line 3 and the plurality of second connection lines 4 are alternately arranged up and down in sequence, and each second connection line 4 and the plurality of first connection lines 3 are also alternately arranged up and down, the plurality of first connection lines 3 and the plurality of second connection lines 4 are mutually limited, further reducing the probability of misalignment between the first connection lines 3 and the second connection lines 4 during the stretching process of the flexible display panel 100, and reducing the influence of the first connection lines 3 and the second connection lines 4 on the plurality of pixel units during the stretching process of the flexible display panel 100.

[0047] In the embodiment of the present application, the plurality of first connecting lines 3 and the plurality of second connecting lines 4 may also be arranged in other ways, such as making some of the first connecting lines 3 located above all of the second connecting lines 4, and some of the first connecting lines 4 located below all of the second connecting lines 4. Alternatively, some of the first connecting lines 3 and some of the second connecting lines 4 may be connected into an integral structure and located on the same layer, which is not limited in the present application.

[0048] In some embodiments, the flexible display panel 100 further includes at least one barrier structure 6 disposed between the island portion 2 and the hollow area 5. Figure 3 As shown, at least one barrier structure 6 is located between the pixel units in the island portion 2 and the hollow area 5. The at least one barrier structure 6 is used to encapsulate the periphery of the island portion 2, thereby encapsulating the pixel units on the island portion 2, reducing the probability of impurities such as water vapor entering the pixel units through the hollow area 5 and causing damage to the pixel units.

[0049] Optionally, the island portion 2 is roughly rectangular, and hollow areas 5 are provided on the four side edges of the island portion 2. Baffle structures 6 are provided between the four side edges of the island portion 2 and the hollow areas 5 to further improve the packaging performance of the flexible display panel 100.

[0050] Optionally, there are multiple barrier structures 6 between any side edge of the island 2 and the hollow area 5, and the multiple barrier structures 6 are arranged along the edge of the island 2. Figure 3 As shown, there are three barrier structures 6 between one side edge of the island portion 2 and the hollow area 5 .

[0051] In some embodiments, such as Figure 3 As shown, the pixel unit includes a transistor 7 and a light-emitting unit 8 connected to the transistor 7. The flexible display panel 100 also includes a first data line 9 located on one side of the base substrate 1. The first data line 9 is electrically connected to the transistors 7 of the plurality of pixel units, and a plurality of first connection lines 3 and a second connection line 4 are electrically connected to the first data line 9.

[0052] In the embodiment of the present application, the first data line 9 can be a source line. A plurality of first connection lines 3 and a plurality of second data lines 4 are electrically connected to the first data line 9 to electrically connect to a plurality of pixel units through the first data line 9, thereby realizing data transmission with the plurality of pixel units. Optionally, the flexible display panel 100 can include a plurality of first data lines 9, which are arranged parallel to each other and extend along the column arrangement direction of the plurality of island portions 2. Each first data line 9 can be electrically connected to the transistors 7 of the plurality of pixel units in a column of the island portion 2.

[0053] In the embodiment of the present application, the connection method of the multiple first connection lines 3 and the multiple second connection lines 4 and the first data line 9 can be set according to needs. It is only necessary to ensure that signal transmission is achieved between the multiple first connection lines 3 and the multiple second connection lines 4 and the first data line 9. This application does not limit this.

[0054] In some embodiments, such as Figure 3 As shown, a first via structure 32 is provided on the first connection line 3, and the first data line 9 is electrically connected to the first connection line 3 through the first via structure 32; and / or a first via structure 32 is provided on the second connection line 4, and the first data line is electrically connected to the second connection line through the first via structure.

[0055] In the embodiment of this application, Figure 3As shown, a first via structure 32 can be etched on the first connection line 3 or the second connection line 4, and the first data line 9 is electrically connected to the first connection line 3 and the second connection line 4 through the first via structure 32. The first via structure 32 can increase the electrical contact area between the first data line 9 and the first connection line 3 and the second connection line 4, thereby ensuring better electrical stability between the first connection line 3, the second connection line 4, and the first data line 9. In addition, the first data line 9 can also be used to secure the first connection line 3 and the second connection line 4, further reducing the probability of misalignment between the first connection line 3 and the second connection line 4 during the stretching process of the flexible display panel 100, thereby reducing the impact of the first connection line 3 and the second connection line 4 on multiple pixel units during the stretching process of the flexible display panel 100.

[0056] Optionally, the first connection line 3 can be in contact with and connected to the first data line 9, and the second connection line 4 can be in contact with and connected to the first data line 9. When the first connection line 3 and the second connection line 4 are in contact with and connected to the first data line 9, there is no need to etch the first connection line 3 and the second connection line 4, thereby reducing process difficulty and complexity.

[0057] Optionally, the first data line 9 is a metal line, and the material of the first data line 9 may include metal materials such as copper, aluminum, silver, or alloy materials containing the above metal materials.

[0058] In some embodiments, the light emitting unit 8 includes a first planarization layer 81 , an anode layer 82 , a light emitting layer 83 and a cathode layer 84 sequentially arranged in a direction away from the transistor 7 , and at least one barrier structure 6 is arranged in the same layer as the first planarization layer 81 .

[0059] In the embodiment of this application, Figure 3 As shown, the first planarization layer 81 is located between the anode layer 82 and the transistor 7. The first planarization layer 81 is used to improve the flatness of the surface of the transistor 7 away from the substrate 1, facilitating the fabrication of subsequent film layers. The at least one barrier structure 6 and the first planarization layer 81 are disposed on the same layer, which can reduce the thickness of the flexible display panel 100. Furthermore, the at least one barrier structure 6 and the first planarization layer 81 can be fabricated on the same layer, that is, the at least one barrier structure 6 and the first planarization layer 81 can be formed on the same layer in a single fabrication process using the same mask, reducing the processing difficulty and complexity of the at least one barrier structure 6.

[0060] Optionally, the materials of the anode layer 82 and the cathode layer 83 may include transparent metal oxides, such as indium zinc oxide (IZO), indium tin oxide (ITO), etc. The materials of the anode layer 82 and the cathode layer 83 may also include metal materials such as copper, aluminum, silver, or alloy materials containing the above metal materials, etc., which can be set according to actual needs and are not limited in this application.

[0061] Optionally, the flexible display panel 100 further includes a pixel-defining layer 10, which is positioned between the light-emitting unit 8 and the transistor 7. The pixel-defining layer 10 includes a plurality of pixel openings, within which the light-emitting units are positioned. The pixel-defining layer 7 is used to separate the light-emitting units 8. Optionally, the anode layer 82 and the organic light-emitting layer 83 of each light-emitting unit 8 are separated by the pixel-defining layer 4, while the cathode layers 84 of at least some of the light-emitting units 8 can be connected as a whole to have equal potentials.

[0062] In some embodiments, such as Figure 3 As shown, the transistor 7 includes an active layer 71, a first insulating layer 72, a first gate metal layer 73, a second insulating layer 74, a second gate metal layer 75 and a source-drain metal layer 76 located on one side of the base substrate 1. The first gate metal layer 73 includes a first gate 731, the second gate metal layer 75 includes a second gate 751, the source-drain metal layer 76 includes a source electrode 761 and a drain electrode 762, the source electrode 761 and the drain electrode 762 are connected to the active layer 71 via a hole, the anode layer 82 is connected to the source electrode 761 or the drain electrode 762 via a hole, the first data line 9 is electrically connected to the source electrode 761 or the drain electrode 762, and the first data line 9 is arranged on the same layer as the source-drain metal layer 75.

[0063] In the embodiment of the present application, the transistor 7 is used to drive the light-emitting layer 83 in the corresponding light-emitting unit 8 to emit light. The flexible display panel 100 can be a top gate structure, a bottom gate structure or a double gate structure, which is not specifically limited in this application. Figure 3 As shown, taking the flexible display panel 100 as a dual-gate structure as an example, the transistor 7 includes an active layer 71, a first insulating layer 72, a first gate metal layer 73, a second insulating layer 74, a second gate metal layer 75 and a source-drain metal layer 76 arranged in sequence along a direction away from the base substrate 1.

[0064] In the embodiment of the present application, the materials of the first gate metal layer 73, the second gate metal layer 75, and the source / drain metal layer 76 may include metal materials such as copper, aluminum, silver, or alloy materials containing the above metal materials. The materials of the first insulating layer 72 and the second insulating layer 74 may include inorganic insulating materials such as silicon oxide, silicon nitride, and silicon oxynitride, or may include organic insulating materials such as polyimide, polyphthalimide, polyphthalamide, acrylic resin, benzocyclobutene, or phenolic resin.

[0065] In the embodiment of this application, Figure 4As shown, one side of the base substrate 1 includes an island portion 2 and a hollow portion 5 surrounding the island portion 2. The manufacturing process of the flexible display panel 100 can be as follows: forming a second planarization layer 20 on the hollow portion 5 of the base substrate 1, and sequentially forming an active layer 71, a first insulating layer 72, a first gate metal layer 73, a second insulating layer 74, and a second gate metal layer 75 on the island portion 2 of the base substrate 1, and forming a second via structure 741 on the first insulating layer 72 and the second insulating layer 74. Then, a portion of the second planarization layer 20 is etched, and the first connection line 3 or the second connection line 4 is formed on the side of the second planarization layer 20 away from the island portion 2. Then, a first via structure 31 is formed by etching on the surface of the first connecting line 3 or the second connecting line 4, and then a first data line 9 and a source-drain metal layer 76 are formed on the upper surface of the first connecting line 3 or the second connecting line 4. The source 761 and the drain 762 of the source-drain metal layer 76 are connected to the active layer 71 through the second via structure 741, and the first data line 9 is connected to the first connecting line 3 or the second connecting line 4 through the first via structure 31.

[0066] In some embodiments, at least one first connection line 3 is electrically connected to at least one second connection line 4 at the overlapping area to increase the conductivity between the first connection line 3 and the second connection line 4, so that better current transmission is achieved between the pixel units of the island portion 2 connected to the first connection line 3 and the pixel units of the island portion 2 connected to the second connection line 4, which is beneficial to improving the resolution of the flexible display panel 100.

[0067] Optionally, the first connection line 3 and the second connection line 4 may be connected through a via structure, or the first connection line 3 and the second connection line 4 may be connected in contact, which is not limited in the present application.

[0068] An embodiment of a second aspect of the present application provides a display device, which includes any of the flexible display panels 100 described above.

[0069] In the embodiment of the present application, the display device includes the flexible display panel 100 in any of the above embodiments. The display device includes but is not limited to a mobile phone, a tablet computer, an electronic wearable device, a picture screen, an advertising screen, an electronic paper, etc.

[0070] In the flexible display panel of the display device provided in the embodiment of the present application, a hollow area 5 is provided between the island portion 2 and one or two first connecting lines 3 and / or second connecting lines 4 adjacent thereto. When the flexible display panel 100 is stretched by an external force, the first connecting lines 3 and the second connecting lines 4 are stretched, and the multiple hollow areas 5 around the island portion 2 are deformed, thereby achieving tensile deformation of the flexible display panel 100 without affecting the pixel units on the multiple island portions 5. An overlapping region 31 exists at the intersection of every two intersecting first and second connection lines 3, 4. Furthermore, in the overlapping regions 31 of the first and second connection lines 3, the first connection lines 3 are located above the second connection lines 4 in some overlapping regions 31, while the first connection lines 3 are located below the second connection lines 4 in other overlapping regions 31. In other words, the first and second connection lines 3, 4 are arranged alternately up and down. This allows the first and second connection lines 3, 4 to be mutually restrained when the first and second connection lines 3, 4 are subjected to external tension, thereby reducing the probability of the first and second connection lines 3, 4 being misaligned and affecting the pixel units. Furthermore, when the first and second connection lines 3, 4 are subjected to external tension, a small range of displacement may occur between the first and second connection lines 3, 4 along the extension direction of the first and second connection lines 3, 4, thereby increasing the stretching range of the flexible display panel 100.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A flexible display panel, characterized in that: include: A base substrate and a plurality of island portions located on one side of the base substrate, wherein at least one pixel unit is provided on the island portion; a plurality of first connecting lines and a plurality of second connecting lines, the plurality of first connecting lines and the plurality of second connecting lines connecting adjacent island portions, the plurality of first connecting lines being located on one side of a base substrate and being arranged parallel to each other, the plurality of second connecting lines being located on one side of a base substrate and being arranged parallel to each other, two adjacent first connecting lines and two adjacent second connecting lines intersecting to define the island portion, and a hollow region being defined between the island portion and the adjacent first connecting lines and / or second connecting lines, the plurality of first connecting lines and the plurality of second connecting lines having a plurality of overlapping regions, wherein in some overlapping regions, the first connecting lines are located on a side of the second connecting lines away from the base substrate, and in other overlapping regions, the first connecting lines are located on a side of the second connecting lines close to the base substrate; The plurality of first connecting lines and the plurality of second connecting lines have a plurality of first overlapping regions and a plurality of second overlapping regions, wherein in the plurality of first overlapping regions, the first connecting lines are located on a side of the second connecting lines away from the base substrate, and in the second overlapping regions, the first connecting lines are located on a side of the second connecting lines close to the base substrate; Along the extension direction of the first connecting line, the first overlapping areas and the second overlapping areas are alternately arranged; and / or along the extension direction of the second connecting line, the first overlapping areas and the second overlapping areas are alternately arranged.

2. The flexible display panel according to claim 1, wherein: The material of the plurality of first connecting lines includes graphene, and / or the material of the plurality of second connecting lines includes graphene.

3. The flexible display panel according to claim 1, wherein: The flexible display panel further includes at least one barrier structure disposed between the island portion and the hollow area.

4. The flexible display panel according to claim 3, wherein: The pixel unit includes a transistor and a light emitting unit connected to the transistor; The flexible display panel further includes a first data line located on one side of the base substrate, the first data line is electrically connected to transistors of a plurality of pixel units, and the plurality of first connection lines and the second connection line are electrically connected to the first data line.

5. The flexible display panel according to claim 4, wherein: The light emitting unit includes a first planarization layer, an anode layer, a light emitting layer and a cathode layer which are sequentially arranged in a direction away from the transistor, and the at least one barrier structure is arranged in the same layer as the first planarization layer.

6. The flexible display panel according to claim 5, wherein: The transistor includes an active layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer and a source-drain metal layer located on one side of the base substrate, the first gate metal layer includes a first gate, the second gate metal layer includes a second gate, the source-drain metal layer includes a source and a drain, the source and the drain are connected to the active layer vias, the anode layer is connected to the source or the drain via, the first data line is electrically connected to the source or the drain, and the first data line is arranged on the same layer as the source-drain metal layer.

7. The flexible display panel according to claim 4, wherein: The first connecting line is provided with a first via structure, and the first data line is electrically connected to the first connecting line through the first via structure; and / or the second connecting line is provided with the first via structure, and the first data line is electrically connected to the second connecting line through the first via structure.

8. The flexible display panel according to claim 1, wherein: At least one first connection line is electrically connected to at least one second connection line at the overlapping region.

9. A display device, characterized in that: The display device comprises the flexible display panel according to any one of claims 1 to 8.

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