Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel, a preparation method thereof and a display device, and relates to the technical field of display. For an island-shaped display area included in a first stretchable substrate in the display panel, the first stretchable substrate and the display substrate are connected through a first bonding layer, the second stretchable substrate and the display substrate are connected through a second bonding layer, and then the display substrate is fixed between the first stretchable substrate and the second stretchable substrate. For the stretching area included in the first stretchable substrate in the display panel, no bonding layer is arranged to fix the display substrate. Therefore, after the display panel is subjected to the stretching force, the part, located in the stretching area, of the display panel can be stretched in all directions of the surface where the first stretchable substrate is located and can also be stretched in the direction perpendicular to the first stretchable substrate, the stretching amount of the display panel is increased, and the deformation flexibility of the display panel is high.

Description

Display panel and manufacturing method thereof, and display device

[0001] This disclosure claims priority to Chinese patent application No. 202310797409.X filed on June 30, 2023, entitled “A display panel, manufacturing method and display device”. The entire contents of the above case are incorporated into this disclosure by reference. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0003] Organic light-emitting diode (OLED) display panels offer advantages such as self-luminescence, low driving voltage, and fast response. Compared to liquid crystal display panels, OLED display panels are also bendable, offering a wider range of applications. Furthermore, after years of technological development, OLED display panels have evolved from currently curved products to foldable and even stretchable ones.

[0004] Summary of the Invention

[0005] This application provides a display panel and a method for manufacturing the same, and a display device. The technical solutions are as follows:

[0006] In one aspect, a display panel is provided, comprising:

[0007] a first stretchable substrate comprising a plurality of island-shaped display areas, a stretching area connecting adjacent island-shaped display areas, and a hollow area between the island-shaped display areas and the stretching area;

[0008] A display substrate, the display substrate comprising a plurality of display units, the display units being located in the island-shaped display area;

[0009] a first adhesive layer located between the display substrate and the first stretchable substrate, wherein an orthographic projection of the first adhesive layer on the first stretchable substrate is located within an orthographic projection of the display unit on the first stretchable substrate;

[0010] Also, a second adhesive layer located on a side of the display substrate away from the first stretchable substrate, and a second stretchable substrate located on a side of the second adhesive layer away from the display substrate, the orthographic projection of the second adhesive layer on the first stretchable substrate being within the orthographic projection of the display unit on the first stretchable substrate.

[0011] Optionally, the display unit includes: a first flexible substrate, a display layer, and an encapsulation film layer stacked in sequence in a direction away from the first stretchable base;

[0012] Wherein, for each of the island-shaped display areas, the display substrate includes at least one display unit located in the island-shaped display area, and each of the display units includes a plurality of sub-pixels.

[0013] Optionally, the display substrate further comprises: a plurality of signal lines, wherein a portion of each signal line is located in the island-shaped display area and another portion is located in the stretching area;

[0014] The portion of the signal line located in the island-shaped display area is connected to the display layer of the display unit, and the signal line is used to transmit a driving signal provided by a driving circuit.

[0015] Optionally, the display substrate further comprises: a second flexible substrate, a first flexible film layer, and a second flexible film layer located in the stretching region and stacked sequentially in a direction away from the first stretchable base;

[0016] Wherein, the portion of the signal line located in the stretching area is located between the first flexible film layer and the second flexible film layer.

[0017] Optionally, the first flexible substrate has one or more first groove structures on a side close to the first stretchable base;

[0018] A portion of the first adhesive layer is located in the first groove structure, a portion of the surface of the first adhesive layer close to the first flexible substrate is bonded to the inner wall of the first groove structure, and a portion of the surface of the first adhesive layer close to the first stretchable substrate is bonded to the first stretchable substrate.

[0019] Optionally, a side of the first flexible substrate close to the first stretchable base includes a first area and a second area, and the first area is closer to the connection between the island display area and the stretching area than the second area;

[0020] In the case where the first flexible substrate has a plurality of first groove structures on a side close to the first stretchable base, an arrangement density of the first groove structures in the first region is greater than an arrangement density of the first groove structures in the second region.

[0021] Optionally, the shape of the orthographic projection of each of the first groove structures on the first stretchable substrate is a circle, an ellipse, a square, a regular hexagon, or a rhombus.

[0022] Optionally, when the first flexible substrate has a plurality of first groove structures on a side close to the first stretchable base, the shapes of the orthographic projections of the plurality of first groove structures on the first stretchable base are the same.

[0023] Optionally, when the first flexible substrate has multiple first groove structures on a side close to the first stretchable base, the center points of the positive projections of the multiple first groove structures on the first stretchable base constitute a central symmetrical figure, and the center of symmetry of the central symmetrical figure is the center of the island-shaped display area.

[0024] Optionally, a depth of the first groove structure is 10% to 60% of a thickness of the first flexible substrate.

[0025] Optionally, the plurality of island-shaped display areas are arranged in an array in a first direction and a second direction; the orthographic projection of the first groove structure on the reference plane is in the shape of a trapezoid, a semicircle, a semi-ellipse, and a T-shape;

[0026] The reference plane is perpendicular to the supporting surface of the first stretchable substrate, and the reference plane is parallel to the first direction or the second direction.

[0027] Optionally, the packaging film layer has one or more second groove structures on a side away from the first stretchable substrate;

[0028] A portion of the second adhesive layer is located in the second groove structure, a portion of the surface of the second adhesive layer close to the first flexible substrate is bonded to the inner wall of the second groove structure, and a surface of the second adhesive layer close to the second stretchable substrate is bonded to the second stretchable substrate.

[0029] Optionally, the encapsulation film layer includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked in sequence in a direction away from the first stretchable substrate; the first encapsulation layer and the third encapsulation layer are made of inorganic materials, and the second encapsulation layer is made of organic materials;

[0030] The one or more second groove structures are located on the surface of the third packaging layer away from the first stretchable substrate; the distance between the surface of the second groove structure close to the first stretchable substrate and the surface of the third packaging layer close to the first stretchable substrate is greater than or equal to 600 nanometers.

[0031] Optionally, the display panel further includes a fixed film layer;

[0032] The fixed film layer is located in the island display area and between the first adhesive layer and the first stretchable substrate. The first adhesive layer is used to connect the fixed film layer and the first flexible substrate.

[0033] Optionally, in a case where the first flexible substrate has one or more first groove structures on a side close to the first stretchable base, the fixed membrane layer includes a fixed layer, and one or more protruding structures located on a side of the fixed layer away from the first stretchable base and corresponding to the one or more first groove structures;

[0034] The orthographic projection of each of the protruding structures on the first stretchable substrate is located within the orthographic projection of a corresponding one of the first groove structures on the first stretchable substrate.

[0035] Optionally, the height of the protrusion structure is less than the depth of the first groove structure; and the thickness of the fixed layer is greater than or equal to 1 micron.

[0036] Optionally, the display layer includes: a blocking layer, a buffer layer, an active layer, a gate insulating layer, a gate layer, an interlayer dielectric layer, a source and drain electrode layer, a planarization layer, an anode layer, a pixel defining layer, a light emitting layer, and a cathode layer;

[0037] The active layer includes an active pattern, and the active pattern includes a source region, a drain region, and a channel region;

[0038] The source-drain electrode layer includes a source electrode and a drain electrode, the source electrode is connected to the source region through a first via hole in the interlayer dielectric layer and the gate insulating layer, and the drain electrode is connected to the drain region through a second via hole in the interlayer dielectric layer and the gate insulating layer;

[0039] The gate layer includes a gate pattern, and the channel region is an overlapping area of ​​an orthographic projection of the gate pattern on the first stretchable substrate and an orthographic projection of the active pattern on the first stretchable substrate.

[0040] Optionally, the plurality of signal lines included in the display substrate are located in the source and drain electrode layer; and the second flexible film layer included in the display substrate and the planar layer are located in the same layer.

[0041] In another aspect, a method for preparing a display panel is provided, the method comprising:

[0042] forming a display substrate on a glass substrate, wherein the display substrate includes a plurality of display units;

[0043] forming a temporary adhesive material and a protective film on a side of the display substrate away from the glass base;

[0044] removing the glass substrate and bonding a first stretchable base to a side of the display substrate away from the protective film using a first adhesive layer;

[0045] removing the temporary adhesive material and the protective film, and bonding the second stretchable substrate to a side of the display substrate away from the first stretchable substrate using a second adhesive layer;

[0046] In which, the first stretchable substrate includes multiple island-shaped display areas, a stretching area connecting adjacent island-shaped display areas, and a hollow area located between the island-shaped display areas and the stretching area; the display unit is located in the island-shaped display area; the orthographic projection of the first adhesive layer on the first stretchable substrate is located within the orthographic projection of the display unit on the first stretchable substrate, and the orthographic projection of the second adhesive layer on the first stretchable substrate is located within the orthographic projection of the display unit on the first stretchable substrate.

[0047] Optionally, forming a display substrate on a glass substrate includes:

[0048] forming one or more protrusions on a glass substrate, and forming a first flexible substrate film, a display film, and an encapsulation film on a side of the protrusions away from the glass substrate;

[0049] Etching the first flexible substrate film, the display film, and the encapsulation film to remove portions of the first flexible substrate film, the display film, and the encapsulation film located in the hollow area, thereby obtaining a first flexible substrate, a display layer, and an encapsulation film layer located in the island-shaped display area, and obtaining a second flexible substrate, a first flexible film layer, and a second flexible film layer located in the stretching area;

[0050] The step of removing the glass substrate and bonding the first stretchable base to a side of the display substrate away from the protective film using a first adhesive layer comprises:

[0051] The glass substrate and the raised portion on the glass substrate are removed so that one or more first groove structures are formed on the side of the first flexible substrate away from the display layer. A first adhesive layer is used to adhere the first stretchable substrate to the side of the display substrate away from the protective film, wherein a portion of the first adhesive layer is located within the first groove structure, a portion of the surface of the first adhesive layer close to the first flexible substrate is adhered to the inner wall of the first groove structure, and a surface of the first adhesive layer close to the first stretchable substrate is adhered to the first stretchable substrate.

[0052] In another aspect, a display device is provided, comprising: a power supply component and the display panel according to the above aspect;

[0053] The power supply component is connected to the display panel, and is used to supply power to the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0055] FIG1 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application;

[0056] FIG2 is a partial top view of a first stretchable substrate provided in an embodiment of the present application;

[0057] FIG3 is a partial top view of a display panel provided in an embodiment of the present application;

[0058] FIG4 is a partial schematic diagram of a display panel provided by an embodiment of the present application when stretched;

[0059] FIG5 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0060] FIG6 is a partial top view of another display panel provided in an embodiment of the present application;

[0061] FIG7 is a top view of a first flexible substrate provided in an embodiment of the present application;

[0062] FIG8 is a top view of another first flexible substrate provided in an embodiment of the present application;

[0063] FIG9 is a top view of another first flexible substrate provided in an embodiment of the present application;

[0064] FIG10 is a top view of another first flexible substrate provided in an embodiment of the present application;

[0065] FIG11 is a top view of another first flexible substrate provided in an embodiment of the present application;

[0066] FIG12 is a schematic diagram of a first adhesive layer provided in an embodiment of the present application in a case where a first groove structure is not provided on a first flexible substrate;

[0067] FIG13 is a schematic diagram of a first adhesive layer provided in an embodiment of the present application in which a first groove structure is provided on a first flexible substrate;

[0068] FIG14 is a top view of another first flexible substrate provided in an embodiment of the present application;

[0069] FIG15 is a top view of a first flexible substrate provided with different numbers of first groove structures in four regions according to an embodiment of the present application;

[0070] FIG16 is a top view of a first groove structure having different shapes provided in four regions of a first flexible substrate according to an embodiment of the present application;

[0071] FIG17 is a top view of another first flexible substrate provided in an embodiment of the present application;

[0072] FIG18 is a partial cross-sectional view of a display unit provided in an embodiment of the present application;

[0073] FIG19 is a partial cross-sectional view of another display unit provided in an embodiment of the present application;

[0074] FIG20 is a partial cross-sectional view of another display unit provided in an embodiment of the present application;

[0075] FIG21 is a partial cross-sectional view of another display unit provided in an embodiment of the present application;

[0076] FIG22 is a partial cross-sectional view of another display unit provided in an embodiment of the present application;

[0077] FIG23 is a partial cross-sectional view of another display panel provided in an embodiment of the present application;

[0078] FIG24 is a partial cross-sectional view of another display panel provided in an embodiment of the present application;

[0079] FIG25 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0080] FIG26 is a flow chart of a method for forming a display substrate provided in an embodiment of the present application;

[0081] FIG27 is a schematic diagram of forming a protrusion on a glass substrate according to an embodiment of the present application;

[0082] FIG28 is a schematic diagram of forming a flexible substrate film according to an embodiment of the present application;

[0083] FIG29 is a schematic diagram of forming a hollow area according to an embodiment of the present application;

[0084] FIG30 is a schematic diagram of forming a temporary adhesive material and a protective film according to an embodiment of the present application;

[0085] FIG31 is a schematic diagram of bonding a first stretchable substrate to a side of a display substrate away from a protective film, provided by an embodiment of the present application;

[0086] FIG32 is a schematic diagram of bonding a second stretchable substrate to a side of a display substrate away from the first stretchable substrate, provided by an embodiment of the present application;

[0087] Figure 33 is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0088] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0089] In some embodiments, the OLED display panel includes multiple island-shaped display areas and a stretching area located between adjacent island-shaped display areas. The stretching area can withstand a certain amount of deformation to achieve stretching of the entire display panel. The two ends of the stretching area are respectively connected to two adjacent island-shaped display areas, and the area of ​​the OLED display panel other than the island-shaped display area and the stretching area is a hollow area. Generally, various signal lines need to be laid on the stretching area, so that the signal lines are connected to the pixel units of different island-shaped display areas to achieve signal transmission.

[0090] However, the OLED display panel cannot be deformed in a direction perpendicular to the display panel, and has poor flexibility in use.

[0091] Organic light-emitting diode (OLED) display panels have a series of advantages such as all-solid-state structure, high brightness, full viewing angle, fast response speed, wide operating temperature range and flexible display. At the same time, compared with liquid crystal display panels, OLED display panels can be bent and have a wider range of applications. For example, in the field of flexible displays, OLED display panels can be curled and folded, so they have extremely broad prospects in the field of portable products or wearable products. After several years of technological accumulation, OLED display panels have gradually developed from curved product forms to foldable products and even stretchable products. At present, the stretchable display panel includes a rigid display area and an elastic wire area for connecting the rigid display area. The rigid display area does not withstand tensile deformation, and the elastic wire area can withstand a certain deformation to achieve the stretching of the entire display device.

[0092] FIG1 is a schematic diagram of a display panel according to an embodiment of the present application. Referring to FIG1 , the display panel 100 includes: a first stretchable substrate 101 , a first adhesive layer 102 , a display substrate 103 , a second adhesive layer 104 , and a second stretchable substrate 105 .

[0093] FIG2 is a partial top view of a first stretchable substrate provided in an embodiment of the present application. Referring to FIG2 , the first stretchable substrate 101 includes a plurality of island-shaped display areas 101a, stretching areas 101b connecting adjacent island-shaped display areas 101a, and a hollow area 101c located between the island-shaped display areas 101a and the stretching areas 101b. The island-shaped display areas 101a may also be referred to as display islands. The plurality of island-shaped display areas 101a are used to represent a plurality of independently set areas, each of which can be used to set a display unit to achieve display.

[0094] FIG3 is a partial top view of a display panel provided in an embodiment of the present application. Referring to FIG3 , the display substrate 103 includes a plurality of display units 1031 , each of which is located in an island-shaped display region 101 a . Each display unit 1031 includes a plurality of sub-pixels 1031 . For example, for each island-shaped display region 101 a shown in FIG3 , the display substrate 103 includes one display unit 1031 located in that island-shaped display region 101 a . Each display unit 1031 includes three sub-pixels 1031 .

[0095] 1 , a first adhesive layer 102 is located between a display substrate 103 and a first stretchable substrate 101 . The first adhesive layer 102 is used to bond the display substrate 103 and the first stretchable substrate 101 , so that the display substrate 103 is fixed on the first stretchable substrate 101 .

[0096] The orthographic projection of the first adhesive layer 102 on the first stretchable substrate 101 is located within the orthographic projection of the display unit 1031 on the first stretchable substrate 101. That is, the first adhesive layer 102 is only provided in the island-shaped display area 101a, and is used to bond the portion of the display substrate 103 located in the island-shaped display area 101a to the island-shaped display area 101a of the first stretchable substrate 101. Furthermore, the first adhesive layer 102 need not be provided in the stretching area 101b, and the portion of the display substrate 103 located in the stretching area 101b does not need to be bonded to the stretching area 101b of the first stretchable substrate 101. The portion of the display substrate 103 located in the stretching area 101b need only be placed on the first stretchable substrate 101.

[0097] The second adhesive layer 104 is located on a side of the display substrate 103 away from the first stretchable substrate 101, and the second stretchable substrate 105 is located on a side of the second adhesive layer 104 away from the display substrate 103. In other words, the second adhesive layer 104 is located between the display substrate 103 and the second stretchable substrate 105 and is used to bond the display substrate 103 and the second stretchable substrate 105 together, so that the display substrate 103 is fixed between the first stretchable substrate 101 and the second stretchable substrate 105.

[0098] The orthographic projection of the second adhesive layer 104 on the first stretchable substrate 101 is located within the orthographic projection of the display unit 1031 on the first stretchable substrate 101. That is, the second adhesive layer 104 is only provided in the island-shaped display region 101a, and is used to bond the portion of the display substrate 103 located in the island-shaped display region 101a and the portion of the second stretchable substrate 105 located in the island-shaped display region 101a. Furthermore, the second adhesive layer 104 need not be provided in the stretch region 101b, and the portion of the display substrate 103 located in the stretch region 101b does not need to be bonded to the portion of the second stretchable substrate located in the stretch region 101b.

[0099] In an embodiment of the present application, in the island display area 101a, the display substrate 103 is fixed between the two stretchable substrates by the first adhesive layer 102 and the second adhesive layer 104. And no adhesive layer is provided in the stretching area 101b for fixing. Referring to Figure 4, taking the stretching area as a U-shaped area as an example, since the display panel 100 is not fixed by adhesive in the vertical direction (third direction Z) perpendicular to the bearing surface of the stretchable substrate, after the display panel 100 is subjected to a tensile force, the portion of the display panel 100 located in the stretching area 101b can generate strain in the vertical direction. In addition, the portion of the display panel 100 located in the stretching area 101b can also be stretched in various directions on the surface of the first stretchable substrate 101 (such as the first direction X and the second direction Y that are perpendicular to each other). That is, the deformation flexibility of the display panel 100 is high, which increases the stretching amount of the display panel 100. Among them, multiple island display areas 101a can be arranged in an array in the first direction X and the second direction Y.

[0100] In summary, the embodiment of the present application provides a display panel, and for the island display area included in the first stretchable substrate in the display panel, the first adhesive layer connects the first stretchable substrate and the display substrate, and the second adhesive layer connects the second stretchable substrate and the display substrate, thereby fixing the display substrate between the first stretchable substrate and the second stretchable substrate. For the stretching area included in the first stretchable substrate in the display panel, no adhesive layer is provided to fix the display substrate. Thus, after the display panel is subjected to a stretching force, the portion of the display panel located in the stretching area can be stretched not only in various directions on the surface where the first stretchable substrate is located, but also in a direction perpendicular to the first stretchable substrate. That is, the deformation flexibility of the display panel is high, which increases the stretching amount of the display panel.

[0101] Referring to FIG3 , the shape of the stretch region 101b can be S-shaped. Alternatively, the shape of the stretch region 101b can be other shapes, such as U-shaped, V-shaped, and Z-shaped. The embodiment of the present application does not limit the shape of the stretch region 101b, as long as the stretch region 101b can connect the adjacent island-shaped display areas 101a.

[0102] Optionally, the material of the first adhesive layer 102 and the second adhesive layer 104 may be optically clear adhesive (OCA).

[0103] Optionally, the material of the first stretchable substrate 101 and the second stretchable substrate 105 can be one of highly elastic materials such as polydimethylsiloxane (PDMS), styrene block copolymer (SEBS), aliphatic aromatic random copolyester (Ecoflex) and rubber.

[0104] Figure 5 is a partial cross-sectional view of another display panel provided in an embodiment of the present application. In addition, Figure 5 is also a cross-sectional view of Figure 3 along the AA' direction. Referring to Figure 5, the display unit 1031 includes: a first flexible substrate 1031a, a display layer 1031b and an encapsulation film layer (thin film encapsulation, TFE) 1031c stacked in sequence along a direction away from the first stretchable substrate 101. Since the display unit 1031 is located in the island display area 101a, the first flexible substrate 1031a, the display layer 1031b and the encapsulation film layer 1031c included in the display unit 1031 are located in the island display area 101a. Optionally, the material of the first flexible substrate 1031a can be a flexible material, such as polyimide (PI), or polyethylene terephthalate (PET).

[0105] 3 , for each island-shaped display area 101a, the display substrate 103 includes at least one display unit 1031 located in the island-shaped display area 101a, and each display unit 1031 includes a plurality of sub-pixels. For example, in FIG3 , in each island-shaped display area 101a, the display substrate 103 includes one display unit 1031 located in the island-shaped display area 101a. Each display unit 1031 includes three sub-pixels, which are respectively a red (red, R) sub-pixel, a green (green, G) sub-pixel, and a blue (blue, B) sub-pixel. For example, in FIG6 , in each island-shaped display area 101a, the display substrate 103 includes four display units 1031 located in the island-shaped display area 101a. Each display unit 1031 includes four sub-pixels, which are respectively a red sub-pixel, a blue sub-pixel, and two green sub-pixels.

[0106] As can be seen from Figures 3 and 6 , the display substrate 103 further includes a plurality of signal lines 1032. Each signal line 1032 is partially located in the island display area 101a and partially located in the stretched area 101b. The portion of the signal line 1032 located in the island display area 101a is connected to the display layer 1031b of the display unit 1031. The portion of the signal line 1032 located in the stretched area 101b is used to transmit drive signals provided by the drive circuit. To facilitate the illustration of the display unit 1031 in Figure 6 , the portion of the signal line 1032 located in the island display area 101a is not depicted.

[0107] 3 , the plurality of signal lines 1032 include a plurality of first-type signal lines 1032 a and a plurality of second-type signal lines 1032 b. The plurality of first-type signal lines 1032 a are used to connect the display layers 1031 b of the display units 1031 in the island-shaped display regions 101 a arranged along the first direction X, thereby transmitting drive signals to the display units 1031 in the island-shaped display regions 101 a arranged along the first direction X. The plurality of second-type signal lines 1032 b are used to connect the display layers 1031 b of the display units 1031 in the island-shaped display regions 101 a arranged along the second direction Y, thereby transmitting drive signals to the display units 1031 in the island-shaped display regions 101 a arranged along the second direction Y.

[0108] The plurality of first-type signal lines 1032a may include a gate signal line (gate), a reset signal line (reset), a reset power line (Vinit), and an emission control signal line (EM). The plurality of second-type signal lines 1032b may include a data signal line (data), a positive power line (VDD), and a negative power line (VSS).

[0109] FIG3 schematically shows only four first-type signal lines 1032 a and four second-type signal lines 1032 b . In fact, the number of the first-type signal lines 1032 a and the number of the second-type signal lines 1032 b can be determined according to the actual design of the driving circuit layer included in the display layer 1031 b in the display unit 1031 .

[0110] Referring to Figure 5 , the display substrate 103 further includes: a second flexible substrate 1033, a first flexible film layer 1034, and a second flexible film layer 1035, located in the stretch region 101b and stacked sequentially in a direction away from the first stretchable base 101. The second flexible substrate 1033 and the first flexible substrate 1031a can be located on the same layer; that is, the second flexible substrate 1033 and the first flexible substrate 1031a can be made of the same material and fabricated using a single patterning process. For example, the material of the second flexible substrate 1033 can be PI or PET.

[0111] The portion of the signal line 1032 located in the stretch region 101b is located between the first flexible film layer 1034 and the second flexible film layer 1035. In other words, the signal line 1032 is protected by the first flexible film layer 1034 and the second flexible film layer 1035. Furthermore, because the stretching effect of a flexible film layer is greater than that of a rigid film layer, configuring all film layers included in the stretch region 101b of the display substrate 103 as flexible film layers can enhance the stretching effect of the stretch region 101b.

[0112] 5 , the first flexible substrate 1031a has one or more first groove structures J1 on a side close to the first stretchable substrate 101. A portion of the first adhesive layer 102 is located within the first groove structures J1. A portion of the surface of the first adhesive layer 102 close to the first flexible substrate 1031a is bonded to the inner wall of the first groove structures J1. The surface of the first adhesive layer 102 close to the first stretchable substrate 101 is bonded to the first stretchable substrate 101.

[0113] By providing the first groove structure J1 on the first flexible substrate 1031a, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 can be increased, thereby increasing the stability of the display unit 1031 fixed to the first stretchable base 101 and significantly reducing the deformation force on the display unit 1031 during the stretching process.

[0114] Optionally, the shape of the orthographic projection of each first groove structure J1 on the first stretchable substrate 101 is a circle, an ellipse, a square, a regular hexagon or a rhombus. For example, in Figure 7, the number of the first groove structures J1 is multiple, and the shape of the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 is a circle. In Figure 8, the number of the first groove structures J1 is multiple, and the shape of the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 is a regular hexagon. In Figure 9, the number of the first groove structures J1 is multiple, and the shape of the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 is a rhombus. In Figure 10, the number of the first groove structure J1 is one, and the shape of the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 is a square.

[0115] Taking the shape of the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 in FIG7 as a circle as an example, the diameter d of the circle can range from 60 nm (nanometers) to 200 μm (micrometers). The distance p between two adjacent circles can range from 60 nm to 10 μm. Moreover, the distance p1 between two adjacent circles in the first direction X can be equal to or different from the distance p2 between two adjacent circles in the second direction Y, which is not limited in this embodiment of the present application.

[0116] In the embodiment of the present application, for each island-shaped display area 101a, the multiple first groove structures J1 designed on the first flexible substrate 1031a can be designed with different shapes, sizes, and spacings. Of course, these can also be designed without differentiation, and this embodiment of the present application is not limited to this. In other words, the shapes of the multiple first groove structures J1 on the first flexible substrate 1031a can be different or the same. The sizes of the multiple first groove structures J1 on the first flexible substrate 1031a can be different or the same. The distance between two adjacent first groove structures J1 on the first flexible substrate 1031a can be different or the same.

[0117] Alternatively, referring to Figures 7 to 9 , when the first flexible substrate 1031a has multiple first groove structures J1 on the side closest to the first stretchable substrate 101, the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 may have the same shape, thereby facilitating the preparation of the multiple first groove structures J1. Alternatively, referring to Figure 11 , when the first flexible substrate 1031a has multiple first groove structures J1 on the side closest to the first stretchable substrate 101, the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 may have different shapes.

[0118] In the embodiment of the present application, the shape of the first groove structure J1 affects the contact area between the first flexible substrate 1031a and the first adhesive layer 102. Figure 12 is a schematic diagram of the first adhesive layer in an embodiment of the present application, wherein the first groove structure is not provided on the first flexible substrate. Figure 13 is a schematic diagram of the first adhesive layer in an embodiment of the present application, wherein the first groove structure is provided on the first flexible substrate. Combining Figures 12 and 13, when the first groove structure J1 is in the shape of a cube, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 increases by the lateral surface area of ​​the cube: S1 = 4 × h × b. Where h is the depth of the first groove structure J1, and b is the length and width of the first groove structure J1. If the first flexible substrate 1031a is provided with multiple first groove structures J1 in an m × n array, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 increases by S1 total = m × n × 4 × h × b.

[0119] In conjunction with Figures 12 and 13 , when the first groove structure J1 is cylindrical, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 is increased by the lateral surface area of ​​the cylinder: S2 = π × d × h. Here, h is the depth of the first groove structure J1, and d is the diameter of the first groove structure J1. If the first flexible substrate 1031a includes multiple first groove structures J1 in an m × n array, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 is increased by S2 total = m × n × π × d × h.

[0120] In conjunction with Figures 12 and 13 , if the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 is a regular hexahedron, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 increases by the lateral surface area of ​​the regular hexahedron: S3 = 6 × h × b. Here, h is the depth of the first groove structure J1, and b is the side length of the first groove structure J1. If the first flexible substrate 1031a is provided with multiple first groove structures J1 in an m × n array, the contact area between the first flexible substrate 1031a and the first adhesive layer 102 increases by S3 total = m × n × 6 × h × b.

[0121] 12 and 13 , when the orthographic projection of the first groove structure J1 on the first stretchable substrate 101 is a hemisphere, the contact area between the first flexible substrate 1031 a and the first adhesive layer 102 increases: S4=2πr 2 -πr 2 =πr 2Where r is the radius of the hemisphere. If the plurality of first groove structures J1 provided on the first flexible substrate 1031a is an m×n array, then the contact area between the first flexible substrate 1031a and the first adhesive layer 102 increases by S4 total = m×n×πr 2 .

[0122] In the embodiment of the present application, assuming that the adhesion force of the first adhesive layer 102 is λ (unit: kgf / cm2), the product of the increased contact area and the adhesion force is the increased fixing force of the display unit 1031. In other words, the larger the increased contact area, the greater the increased fixing force of the display unit 1031; the smaller the increased contact area, the smaller the increased fixing force of the display unit 1031.

[0123] Alternatively, regardless of the shape of the first groove structures J1, when the size of the first groove structures J1 is fixed, the increased contact area is positively correlated with the number of first groove structures J1. That is, the greater the number of first groove structures J1, the greater the increased contact area; and the fewer the number of first groove structures J1, the smaller the increased contact area.

[0124] In the embodiment of the present application, to maximize the contact area between the first flexible substrate 1031a and the first adhesive layer 102, the first groove structures J1 can be arranged as densely as possible, provided the process allows. This allows for a greater number of first groove structures J1, thereby increasing the contact area between the first flexible substrate 1031a and the first adhesive layer 102 and providing a greater fixing force for the display unit 1031.

[0125] Optionally, when the first groove structures J1 are arranged in the densest arrangement, the diameter of the minimum circumscribed circle of the first groove structures J1 may be 1.5 μm, and the distance between adjacent first groove structures J1 is also 1.5 μm.

[0126] In the embodiment of the present application, when the first flexible substrate 1031a has a plurality of first groove structures J1 on a side close to the first stretchable substrate 101, regardless of whether the shapes of the orthographic projections of the plurality of first groove structures J1 on the first stretchable substrate 101 are the same, it is necessary to make the center points of the orthographic projections of the plurality of first groove structures J1 on the first stretchable substrate 101 form a centrally symmetrical figure, and the center of symmetry of the centrally symmetrical figure is the center of the island-shaped display area 101a.

[0127] Referring to Figure 11, the shapes of the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 are different (including circles, regular hexagons and rhombuses), and the multiple first groove structures J1 are arranged in an array in the first direction X and the second direction Y. And the center of symmetry of the central symmetrical figure formed by the center points of the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 is the center of the island-shaped display area 101a. Alternatively, referring to Figure 14, the shapes of the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 are the same (regular hexagons). Although they are not arranged in an array, the center points of the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 can also form a central symmetrical figure, and the center of symmetry of the central symmetrical figure is the center of the island-shaped display area 101a.

[0128] The reason why it is necessary to make the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 centrally symmetrical with respect to the center of the island-shaped display area 101a is that: if the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 are not centrally symmetrical with respect to the center of the island-shaped display area 101a, then the fixing force of the display unit 1031 in different areas will be different, and then when the display panel is subjected to a tensile force, the area with lower fixing force of the display unit 1031 will cause the display unit 1031 to separate from the first stretchable substrate 101.

[0129] For example, referring to Figure 15 , the first flexible substrate 1031a is divided into four regions (region 1, region 2, region 3, and region 4). The first flexible substrate 1031a has seven first groove structures J1 in region 1, four first groove structures J1 in region 2, one first groove structure J1 in region 3, and no first groove structure J1 in region 4. For example, if the first groove structure J1 is a regular hexahedron, the increased contact area in region 1 is S(region 1) = 7 × 6 × h × b. The increased contact area in region 2 is S(region 2) = 4 × 6 × h × b. The increased contact area in region 3 is S(region 3) = 1 × 6 × h × b. The increased contact area in region 4 is S(region 4) = 0 × 6 × h × b.

[0130] According to the comparison of the increased contact areas in the above four regions, the increased contact area in region 1 is greater than the increased contact area in region 2, the increased contact area in region 2 is greater than the increased contact area in region 3, and the increased contact area in region 3 is greater than the increased contact area in region 4. That is, S(region 1)>S(region 2)>S(region 3)>S(region 4). As a result, the fixing force of the display unit 1031 in region 1 is greater than the fixing force in region 2, the fixing force of the display unit 1031 in region 2 is greater than the fixing force in region 3, and the fixing force of the display unit 1031 in region 3 is greater than the fixing force in region 4. When the display panel is subjected to a tensile force, the region where the fixing force of the display unit 1031 is lower (such as region 4) will cause the display unit 1031 to separate from the first stretchable substrate 101.

[0131] For example, referring to FIG16 , the first flexible substrate 1031a is divided into four regions (region 1, region 2, region 3, and region 4). The first flexible substrate 1031a has four first groove structures J1 in region 1, four first groove structures J1 in region 2, five first groove structures J1 in region 3, and one first groove structure J1 in region 4. This design allows the increased contact area in different regions to be determined based on the increased contact area and number of first groove structures J1 of different shapes, thereby determining the magnitude of the fixing force on the display unit 1031 in different regions.

[0132] Generally, since the contact areas increased by first groove structures J1 of different shapes are different, the size can be adjusted to make the contact areas increased in different regions as similar as possible, ensuring that the fixing force of the display unit 1031 in different regions is as consistent as possible.

[0133] Therefore, in the embodiment of the present application, when the first flexible substrate 1031a includes a plurality of first groove structures J1 uniformly arranged in an array, and the shapes and sizes of the plurality of first groove structures J1 are the same, the fixing forces of the display unit 1031 in different areas are substantially the same, thereby ensuring the fixing effects of different display units 1031 in different areas.

[0134] In the embodiment of the present application, the edge of the island display area 101a is closer to the stretch region 101b than the center of the island display area 101a, making it more susceptible to deformation of the stretch region 101b. Therefore, referring to Figure 17 , the side of the first flexible substrate 1031a near the first stretchable substrate 101 includes a first region Q1 and a second region Q2. The first region Q1 is closer to the junction L between the island display area 101a and the stretch region 101b than the second region Q1. When the first flexible substrate 1031a near the first stretchable substrate 101 has multiple first groove structures J1, the arrangement density of the first groove structures J1 in the first region Q1 is greater than the arrangement density of the first groove structures J1 in the second region Q2. In other words, the arrangement density of the first groove structures J1 at the edge of the first flexible substrate 1031a near the stretch region 101b can be higher than the arrangement density of the first groove structures J1 at the center of the island display area 101a. This can increase the adhesion between the edge of the first flexible substrate 1031a located in the island display area 101a close to the stretching area 101b and the first adhesive layer 102, thereby reducing the impact of deformation of the stretching area 101b on the display unit 1031.

[0135] 17 , the connection points L between the island display area 101a and the stretching area 101b are located at the four corners of the island display area 101a. Therefore, the first region Q1 may be the four corner regions of the first flexible substrate 1031a. In these four corner regions, the arrangement density of the first groove structures J1 is relatively high.

[0136] In the embodiment of the present application, referring to Figures 18 and 19, the shape of the orthographic projection of the first groove structure J1 on the reference plane (which can be referred to as the shape of the cross section of the first groove structure J1) is a trapezoid. Referring to Figure 20, the shape of the orthographic projection of the first groove structure J1 on the reference plane is a semicircular shape. Referring to Figure 21, the shape of the orthographic projection of the first groove structure J1 on the reference plane is a T-shape. Alternatively, the shape of the orthographic projection of the first groove structure J1 on the reference plane is other shapes, such as a semi-ellipse, etc. The embodiment of the present application does not limit the shape of the cross section of the first groove structure J1.

[0137] The reference plane is perpendicular to the supporting surface of the first stretchable substrate 101 and parallel to the first direction X or the second direction Y. That is, the orthographic projection of the first groove structure J1 on the reference plane can be the cross section of the first groove structure J1.

[0138] For example, in FIG18 , when the orthographic projection of the first groove structure J1 on the reference plane is a trapezoid, the width of the lower base a2 of the trapezoid ranges from 1.5 μm (micrometers) to 20 μm, and the width of the upper base a1 of the trapezoid ranges from 50% to 90% of the width of the lower base. The spacing a3 between adjacent first groove structures J1 ranges from 1.5 μm to 20 μm.

[0139] In FIG. 20 , when the orthographic projection of the first groove structure J1 on the reference plane is a semicircle, the curvature radius r of the semicircle ranges from 5 μm to 35 μm, and the interval b1 between adjacent first groove structures J1 ranges from 1.5 μm to 20 μm.

[0140] In FIG21 , when the orthographic projection of the first groove structure J1 onto the reference plane is T-shaped, the width e1 of the lower half of the T-shape ranges from 1.5 μm to 10 μm, and the height e2 ranges from 0.5 μm to 5 μm. The width e3 of the upper half of the T-shape exceeds that of the lower half by 0.1 μm to 0.5 μm, and the height e4 of the upper half of the T-shape ranges from 0.05 μm to 1 μm. The spacing e5 between adjacent first groove structures J1 ranges from 1.5 μm to 20 μm.

[0141] In FIG19 , when the orthographic projection of the first groove structure J1 onto the reference plane is a trapezoid, the height f1 of the trapezoid ranges from 0.5 μm to 6 μm, and the slope angle α of the side faces ranges from 30 degrees to 90 degrees. A distance f2 between the first groove structure J1 and the boundary of the first flexible substrate 1031 a ranges from 5 μm to 20 μm.

[0142] In an embodiment of the present application, the height (also referred to as depth) of the first groove structure J1 can be 10% to 60% of the thickness of the first flexible substrate 1031a. The height of the first groove structure J1 can be determined based on existing process capabilities. Optionally, the material of the first flexible substrate 1031a can be polyimide (PI), and the thickness of the first flexible substrate 1031a ranges from 5μm to 10μm. When the thickness of the first flexible substrate 1031a is 10μm, the maximum height of the first groove structure J1 can be 6μm (for example, in the subsequent preparation process, the raised portion T2 can be formed by superimposing an inorganic layer and a multi-layer resin, the thickness of the inorganic layer can be 2μm, and the total thickness of the multi-layer resin can be 4μm). It is estimated that the maximum ratio of the height of the first groove structure J1 to the thickness of the first flexible substrate 1031a is 60%. When the thickness of the first flexible substrate 1031a is 5 μm, the minimum height of the first groove structure J1 can be 0.5 μm (for example, in the subsequent manufacturing process, the protrusion T2 can be made of an inorganic material such as silicon oxide and have a thickness of 0.5 μm). Therefore, it is estimated that the minimum ratio of the height of the first groove structure J1 to the thickness of the first flexible substrate 1031a is 10%.

[0143] Figure 22 is a schematic cross-sectional view of another display panel provided by an embodiment of the present application. Referring to Figure 22, the encapsulation film layer 1031c has one or more second groove structures J2 on a side facing away from the first stretchable substrate 101. A portion of the second adhesive layer 104 is positioned within the second groove structures J2. A portion of the second adhesive layer 104 near the surface of the first flexible substrate 1031a is bonded to the inner walls of the second groove structures J2. The second adhesive layer 104 near the surface of the second stretchable substrate 105 is bonded to the second stretchable substrate 105.

[0144] By setting a second groove structure J2 on the packaging film layer 1031c, the contact area between the packaging film layer 1031c and the second adhesive layer 104 can be increased, thereby increasing the stability of the display unit 1031 fixed between the first stretchable substrate 101 and the second stretchable substrate 105, and significantly reducing the deformation force exerted on the display unit 1031 during the stretching process.

[0145] Optionally, the shape of the second groove structure J2 can be set with reference to the shape of the first groove structure J1. In addition, the shape of the second groove structure J2 can be the same as or different from the shape of the first groove structure J1, which is not limited in this embodiment of the present application.

[0146] Optionally, the orthographic projection of the second groove structure J2 on the first stretchable substrate 101 is one of a circle, a square, a regular hexagon, and a rhombus. In addition, when the packaging film layer 1031c has multiple first groove structures J1 on the side away from the first stretchable substrate 101, the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 may have the same shape, or the orthographic projections of the multiple first groove structures J1 on the first stretchable substrate 101 may have different shapes.

[0147] Furthermore, regardless of the shape of the second groove structures J2, when the size of the second groove structures J2 is fixed, the increased contact area between the encapsulation film layer 1031c and the second adhesive layer 104 is positively correlated with the number of second groove structures J2. In other words, the greater the number of second groove structures J2, the greater the increased contact area between the encapsulation film layer 1031c and the second adhesive layer 104; and the fewer the number of second groove structures J2, the smaller the increased contact area between the encapsulation film layer 1031c and the second adhesive layer 104.

[0148] In the embodiment of the present application, in order to maximize the contact area between the encapsulation film layer 1031c and the second adhesive layer 104, the second groove structures J2 can be arranged as densely as possible, provided that the process allows. This allows for a greater number of second groove structures J2, thereby increasing the contact area between the encapsulation film layer 1031c and the second adhesive layer 104 and providing a greater fixing force for the display unit 1031.

[0149] In the case where the packaging film layer 1031c has multiple second groove structures J2 on the side away from the first stretchable substrate 101, regardless of whether the shapes of the orthographic projections of the multiple second groove structures J2 on the first stretchable substrate 101 are the same, it is necessary to make the orthographic projections of the multiple second groove structures J2 on the first stretchable substrate 101 centrally symmetrical relative to the center of the island-shaped display area 101a.

[0150] In the embodiment of the present application, the distance between the edge of the island display area 101a and the stretch region 101b is closer than the center of the island display area 101a, making it more susceptible to the deformation of the stretch region 101b. Therefore, the arrangement density of the second groove structures J2 of the encapsulation film layer 1031c located at the edge of the island display area 101a near the stretch region 101b can be higher than the arrangement density of the first groove structures J1 of the encapsulation film layer 1031c located at the center of the island display area 101a. This can increase the adhesion between the edge of the encapsulation film layer 1031c at the island display area 101a and the second adhesive layer 104, reducing the impact of the deformation of the stretch region 101b on the display unit 1031. The arrangement of the second groove structures J2 can be similar to the arrangement of the first groove structures J1 in Figure 17.

[0151] In the embodiment of the present application, the orthographic projection of the first groove structure J1 on the reference plane is in the shape of a trapezoid, a semicircle, a T-shape, a semi-ellipse, etc. The embodiment of the present application does not limit the shape of the cross section of the second groove structure J2.

[0152] Optionally, the size of the second groove structure J2 can be set with reference to the size of the first groove structure J1. In addition, the size of the second groove structure J2 can be the same as or different from the size of the first groove structure J1, which is not limited in this embodiment of the present application.

[0153] In the embodiment of the present application, the encapsulation film layer 1031c may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked sequentially in a direction away from the first stretchable substrate 101. The first and third encapsulation layers are made of inorganic materials, while the second encapsulation layer may be made of an organic material. In other words, the encapsulation film layer 1031c may have a three-layer structure: inorganic + organic + inorganic.

[0154] For example, the first and third encapsulation layers may be made of one or more inorganic oxides such as SiNx (silicon nitride), SiOx (silicon oxide), and SiOxNy (silicon oxynitride). The second encapsulation layer may be made of a resin material. The resin may be a thermoplastic resin or a thermoplastic resin. The thermoplastic resin may include acrylic (PMMA) resin, and the thermosetting resin may include epoxy resin.

[0155] Optionally, the second encapsulation layer can be produced using inkjet printing (IJP) and can be referred to as an IJP layer. The first and third encapsulation layers can be produced using chemical vapor deposition (CVD). The first encapsulation layer can be referred to as a CVD1 layer, and the second encapsulation layer can be referred to as a CVD2 layer.

[0156] Typically, to ensure the encapsulation effect of the encapsulation film layer 1031c, the thickness of the third encapsulation layer needs to be greater than or equal to 600 nm. In the embodiment of the present application, since the second groove structure J2 is provided on the encapsulation film layer 1031c away from the first stretchable substrate 101, and the second groove structure J2 is obtained by local etching, when preparing the third encapsulation layer, a thicker third encapsulation film can be first prepared, and then the thicker third encapsulation film can be etched to obtain one or more second groove structures J2.

[0157] For example, the thickness of the thicker third encapsulation film can be greater than or equal to 1100nm, that is, the third encapsulation film is thickened by 500nm. The additional 500nm can be used for local etching to form the second groove structure J2, and the remaining 600nm is used to ensure the encapsulation effect of the encapsulation film layer 1031c. In this case, one or more second groove structures J2 are located on the surface of the third encapsulation layer away from the first stretchable substrate 101, and the distance between the surface of the second groove structure J2 close to the first stretchable substrate 101 and the surface of the third encapsulation layer close to the first stretchable substrate 101 is greater than or equal to 600nm.

[0158] Optionally, since the first stretchable substrate 101 has relatively low rigidity, the first adhesive layer 102 may be made of a material having a certain degree of rigidity to improve the deformation resistance of the display unit 1031 in the island-shaped display area 101a. For example, the Young's modulus of PDMS ranges from 1 MP (megaPascals) to 10 MP. That is, since the first stretchable substrate 101 has relatively low rigidity, the Young's modulus of the material used for the first adhesive layer 102 may be greater than or equal to 5 GPa.

[0159] If the material used for the first adhesive layer 102 has a low Young's modulus (e.g., in the range of 500 kPa (kilopascals) to 3.5 MPa), that is, the first adhesive layer 102 has low rigidity, the display panel 100 may further include a fixing film layer 106. Referring to Figures 23 and 24 , the fixing film layer 106 is located in the island-shaped display area 101a and between the first adhesive layer 102 and the first stretchable substrate 101. The first adhesive layer 102 is used to connect the fixing film layer 106 to the first flexible substrate 1031a.

[0160] Optionally, the material of the fixed film layer 106 can be at least one of inorganic materials such as SiNx, SiON, and SiO. Because the Young's modulus of the fixed film layer 106 is in the range of 1 GPa to 100 GPa, which is relatively large, the fixed film layer 106 can provide deformation resistance for the display unit 1031 in the island display area 101a.

[0161] 23 and 24 , when the first flexible substrate 1031a has one or more first groove structures J1 on a side close to the first stretchable substrate 101, the fixing film layer 106 includes a fixing layer 1061 and one or more protrusion structures T1 located on a side of the fixing layer 1061 away from the first stretchable substrate 101. The orthographic projection of each protrusion structure T1 on the first stretchable substrate 101 is located within the orthographic projection of a corresponding first groove structure J1 on the first stretchable substrate 101.

[0162] The orthographic projection of the protrusion structure T1 on the first stretchable substrate 101 is located within the orthographic projection of a corresponding first groove structure J1 on the first stretchable substrate 101. This may mean that the orthographic projection area of ​​the protrusion structure T1 on the first stretchable substrate 101 is smaller than the area of ​​the corresponding first groove structure J1 on the first stretchable substrate 101, and at least a portion of the protrusion structure T1 can be inserted into the first groove structure J1. In other words, the width of the protrusion structure T1 in the fixing film layer 106 is smaller than the width of the first groove structure J1. This allows the first groove structure J1 to form a better fit with the protrusion structure T1, thereby effectively increasing the contact area between the first adhesive layer 102, the fixing film layer 106, and the first flexible substrate 1031a, and further improving the bonding strength between the first adhesive layer 102, the fixing film layer 106, and the first flexible substrate 1031a.

[0163] Optionally, the height of the protrusion structure T1 is smaller than the height of the first groove structure J1, and the thickness g1 of the fixed layer 1061 is greater than or equal to 1 μm, so as to ensure that the fixed film layer 106 has good strength.

[0164] In an embodiment of the present application, the display unit 1031 includes a pixel circuit and a light-emitting unit. The pixel circuit includes a plurality of thin-film transistors and at least one storage capacitor. Optionally, the pixel circuit may include seven thin-film transistors and one storage capacitor, that is, a pixel circuit having a 7T1C pixel circuit. Alternatively, the pixel circuit may include other numbers of thin-film transistors (TFTs) and other numbers of storage capacitors. The embodiment of the present application does not limit the number of thin-film transistors included in the pixel circuit and the number of storage capacitors included.

[0165] Each thin film transistor includes a gate, a source, and a drain. The pixel circuit includes multiple thin film transistors that are interconnected to achieve the function of driving the light-emitting unit to emit light.

[0166] 5 and 22 to 24 , the display layer 1031 b includes a buffer layer (buffer) b1, an active layer (ACT) b2, a gate insulator (GI) b3, a gate layer (gate) b4, an inter-level dielectric (ILD) b5, a source / drain layer (b6), a planarization layer (PLN) b7, an anode layer (anode layer) b8, a pixel definition layer (PDL) b9, a light-emitting layer (b10), and a cathode layer (cathode layer) b11. The buffer layer b1, active layer b2, gate insulator b3, gate layer b4, inter-level dielectric b5, source / drain layer (b6) (also referred to as an SD layer), and planarization layer b7 are used to form the pixel circuit of the display unit 1031. The anode layer b8 , the pixel defining layer b9 , the light-emitting layer b10 (the light-emitting layer may also be referred to as an EL functional layer) and the cathode layer b11 are used to form a light-emitting unit of the display unit 1031 .

[0167] The active layer b2 includes an active pattern, which includes a source region, a drain region, and a channel region. The source-drain layer includes a source electrode and a drain electrode. The source electrode is connected to the source region through a first via in the interlayer dielectric layer and the gate insulating layer, and the drain electrode is connected to the drain region through a second via in the interlayer dielectric layer and the gate insulating layer.

[0168] The gate layer b4 includes a gate pattern, and the channel region is an overlapping area of ​​an orthographic projection of the gate pattern on the first stretchable substrate 101 and an orthographic projection of the active pattern on the first stretchable substrate 101 .

[0169] Optionally, the material of the source and drain electrode layer b6 can be a metal or a metal alloy. For example, the material of the source and drain electrode layer b6 can be one of titanium, aluminum, molybdenum, copper, silver, and gold, or the material of the source and drain electrode layer b6 can be titanium aluminum alloy and aluminum neodymium alloy. Of course, the material of the source and drain electrode layer b6 can also be a conductive material with good tensile properties, such as nano silver wires, carbon nanotubes, graphene and liquid metal, etc. Alternatively, the material of the source and drain electrode layer b6 can also be an organic mixture, such as carbon nanotubes, silver nanosheets, stretchable resins and rubber, etc. Among them, the source and drain electrode layer b6 can be graphically designed using processes such as inkjet printing, 3D printing, printing and nanoimprinting.

[0170] Optionally, the light-emitting layer b9 can be prepared by an evaporation process. The anode layer b8 and the cathode layer b10 are both in contact with and electrically connected to the light-emitting layer b9. The anode layer b8 and the cathode layer b10 jointly realize electrical control of the light-emitting layer b9, so that the light-emitting layer b9 can emit light. The material of the cathode layer b10 can be a metal or a metal alloy, such as at least one of Mg (magnesium) and Ag (silver), or the material of the cathode layer b10 can be a transparent conductive oxide such as indium zinc oxide (IZO).

[0171] The film layers in the display layer 1031b (such as the light-emitting layer and the cathode layer) are easily corroded by water vapor and oxygen. However, since the packaging film layer 1031c is arranged above the display layer 1031c, the packaging film layer 1031c can protect the film layers in the display layer 1031b and avoid water and oxygen corrosion.

[0172] In this embodiment of the present application, the display substrate 103 includes multiple signal lines 1032 located in the source and drain electrode layer. In other words, the multiple signal lines 1032 can be made of the same material as the source and drain electrodes of the thin-film transistors and fabricated using the same patterning process. The display substrate 103 includes a second flexible membrane layer 1035 located in the same layer as the planar layer. In other words, the second flexible membrane layer 1035 can be made of the same material as the planar layer b7 and fabricated using the same patterning process.

[0173] In order to enable the stretching area 101b to be stretched, the inorganic material film layer in the stretching area 101b needs to be removed. This will result in a large step difference between the surface used to form the source and drain layer in the island display area 101a and the surface used to form the source and drain layer b6 in the stretching area 101b when forming the source and drain layer b6, which may affect the wiring of the signal line 1032 in the stretching area 101b. Therefore, in order to reduce the surface step difference between the two areas, a layer of organic material layer (i.e., the first flexible film layer 1034) can be set separately in the stretching area 101b to fill the void after removing the inorganic material film layer, so that the surface used to form the source and drain layer in the island display area 101a and the surface used to form the source and drain layer b6 in the stretching area 101b are roughly located in the same plane, reducing the difficulty of wiring the signal line 1032. Optionally, the material of the first flexible film layer 1034 can be resin.

[0174] Optionally, the distance between the first flexible film layer 1034 and the surface of the second flexible substrate 1033, and the distance between the interlayer dielectric layer b5 and the surface of the first flexible substrate 1031a in the third direction Z are less than a distance threshold. That is, the surface of the island-shaped display area 101a used to form the source and drain electrode layer b6 and the surface of the stretched area 101b used to form the source and drain electrode layer b6 are substantially located in the same plane.

[0175] 5 , the display substrate 103 may include a flexible layer 1036 located in the island display area 101a, and the flexible layer 1036 may be prepared together with the first flexible film layer 1034. The flexible layer 1036 may be made of resin.

[0176] In summary, the embodiment of the present application provides a display panel, for the island display area included in the first stretchable substrate in the display panel, the first adhesive layer connects the first stretchable substrate and the display substrate, and the second adhesive layer connects the second stretchable substrate and the display substrate, thereby fixing the display substrate between the first stretchable substrate and the second stretchable substrate. For the stretching area included in the first stretchable substrate in the display panel, no adhesive layer is provided to fix the display substrate. Thus, after the display panel is subjected to a stretching force, the portion of the display panel located in the stretching area can be stretched not only in various directions on the surface where the first stretchable substrate is located, but also in a direction perpendicular to the first stretchable substrate. That is, the deformation flexibility of the display panel is high, which increases the stretching amount of the display panel.

[0177] In an embodiment of the present application, through the special design of the display panel, when the display panel (stretchable panel) is deformed by external force, the display units (pixel circuits and light-emitting units) in the island-shaped display area are almost not deformed, while the stretching area can withstand larger deformation, thereby ensuring that the display panel can work normally under stretching conditions.

[0178] FIG25 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present application. Referring to FIG25 , the method includes:

[0179] Step S101: forming a display substrate on a glass substrate.

[0180] In the embodiment of the present application, when forming a display panel, a substrate with a certain degree of rigidity can be obtained first, and a display substrate 103 can be formed on the substrate. The rigid substrate can be a glass substrate. The display substrate 103 includes a plurality of display units 1031.

[0181] 26 , when one or more first groove structures J1 are provided on the first flexible substrate 1031 a of the display substrate 103 , the process of forming the display substrate 103 includes:

[0182] Step S1011: forming one or more protrusions on a glass substrate, and forming a flexible substrate film, a display film, and an encapsulation film on a side of the protrusion away from the glass substrate.

[0183] 27 , the material of the protrusion T2 may include silicon oxide and transparent resin. The protrusion T2 may be formed by processes such as exposure, development, and etching, or by inkjet printing or nanoimprinting.

[0184] Referring to Figure 28 , after the protrusions T2 are formed, a liquid flexible substrate material can be applied to the glass substrate. Since the protrusions T2 are formed before the liquid flexible substrate material is applied, the area around the protrusions T2 is not coated with the flexible substrate material during the application of the liquid flexible substrate material. This results in an uneven structure on the flexible substrate. Following the coating process, the flexible substrate material is cured to secure the uneven structure, resulting in a flexible substrate film. This uneven structure can be used to represent the first groove structure J1.

[0185] Next, a display film and an encapsulation film are formed on the flexible substrate film. The display film may include each film layer in the display unit 1031 (the portion of the film layer located in the hollowed-out area 101c is not etched at this stage and is the entire film layer). The encapsulation film may include a CVD1 film, an IJP film, and a CVD2 film.

[0186] Step S1012: Etch the first flexible substrate film, the display film, and the encapsulation film to remove the portions of the first flexible substrate film, the display film, and the encapsulation film located in the hollow area, thereby obtaining the first flexible substrate, the display layer, and the encapsulation layer located in the island-shaped display area, and obtaining the second flexible substrate, the first flexible film layer, and the second flexible film layer located in the stretching area.

[0187] 29 , an etching process may be used to remove the portion located in the hollow region 101 c , thereby facilitating obtaining a stretchable display panel.

[0188] Step S102 : forming a temporary adhesive material and a protective film on a side of the display substrate away from the glass base.

[0189] In the embodiment of the present application, referring to FIG30 , a temporary adhesive is located on the side of the display substrate away from the glass substrate, and a protective film is located on the side of the temporary adhesive away from the display substrate. The temporary adhesive is used to bond the display substrate and the protective film. The temporary adhesive and protective film protect the side of the display substrate 103 away from the glass substrate, preventing damage to the display substrate 103 during the display panel manufacturing process.

[0190] Step S103 : removing the glass substrate, and using a first adhesive layer to adhere the first stretchable base to the side of the display substrate away from the protective film.

[0191] In an embodiment of the present application, since the tensile properties of the glass substrate are relatively poor, after the display substrate 103 is prepared, the glass substrate can be removed by a laser lift-off process, and the first stretchable substrate 101 with better tensile properties can be bonded to the side of the display substrate 103 away from the protective film using a first adhesive layer 102.

[0192] Optionally, since the protrusions T2 are formed on the glass substrate, they are not affected by laser lift-off. If the protrusions T2 are formed on the glass substrate, during the removal of the glass substrate, the protrusions T2 can separate from the glass substrate and the flexible substrate, thereby forming one or more first groove structures J1 on the lower surface of the first flexible substrate 1031a.

[0193] After the glass substrate and raised portion T2 are removed, an adhesive material can be formed on the first flexible substrate 1031a using a process such as dispensing or inkjet printing. The first stretchable substrate 101 is then attached to the underside of the first flexible substrate 1031a, and the adhesive material is finally cured. As shown in FIG31 , a first adhesive layer 102 is obtained, completing the bonding of the first flexible substrate 1031a and the first stretchable substrate 101.

[0194] Step S104 : removing the temporary adhesive material and the protective film, and using a second adhesive layer to adhere the second stretchable substrate to a side of the display substrate away from the first stretchable substrate.

[0195] In the embodiment of the present application, after bonding the first stretchable substrate 101, the temporary adhesive and protective film on the side of the display substrate 103 away from the first stretchable substrate 101 can be removed (peeled off). Then, the second stretchable substrate 105 with better stretchability can be bonded to the side of the display substrate 103 away from the first stretchable substrate 101 using the second adhesive layer 104.

[0196] Specifically, a process such as dispensing or inkjet printing can be used to form an adhesive material on the side of the encapsulation film layer 1031c away from the first stretchable substrate 101. The second stretchable substrate 105 is then attached to the top of the encapsulation film layer 1031c, and the adhesive material is finally cured. As shown in Figure 32, the second adhesive layer 104 is obtained, completing the bonding of the encapsulation film layer 1031c and the second stretchable substrate 105.

[0197] In the embodiment of the present application, the first stretchable substrate 101 includes multiple island-shaped display areas 101a, stretchable areas 101b connecting adjacent island-shaped display areas 101a, and hollow areas 101c located between the island-shaped display areas 101a and the stretchable areas 101b. The display unit 1031 is located in the island-shaped display areas 101a. The first adhesive layer 102 is located between the display substrate 103 and the first stretchable substrate 101. The first adhesive layer 102 is used to bond the display substrate 103 and the first stretchable substrate 101, thereby securing the display substrate 103 to the first stretchable substrate 101.

[0198] The orthographic projection of the first adhesive layer 102 on the first stretchable substrate 101 is located within the orthographic projection of the display unit 1031 on the first stretchable substrate 101. That is, the first adhesive layer 102 is only provided in the island-shaped display area 101a, and is used to bond the portion of the display substrate 103 located in the island-shaped display area 101a to the island-shaped display area 101a of the first stretchable substrate 101. Furthermore, the first adhesive layer 102 need not be provided in the stretching area 101b, and the portion of the display substrate 103 located in the stretching area 101b does not need to be bonded to the stretching area 101b of the first stretchable substrate 101. The portion of the display substrate 103 located in the stretching area 101b need only be placed on the first stretchable substrate 101.

[0199] The second adhesive layer 104 is located on a side of the display substrate 103 away from the first stretchable substrate 101, and the second stretchable substrate 105 is located on a side of the second adhesive layer 104 away from the display substrate 103. In other words, the second adhesive layer 104 is located between the display substrate 103 and the second stretchable substrate 105 and is used to bond the display substrate 103 and the second stretchable substrate 105 together, so that the display substrate 103 is fixed between the first stretchable substrate 101 and the second stretchable substrate 105.

[0200] The orthographic projection of the second adhesive layer 104 on the first stretchable substrate 101 is located within the orthographic projection of the display unit 1031 on the first stretchable substrate 101. That is, the second adhesive layer 104 is only provided in the island-shaped display region 101a, and is used to bond the portion of the display substrate 103 located in the island-shaped display region 101a and the portion of the second stretchable substrate 105 located in the island-shaped display region 101a. Furthermore, the second adhesive layer 104 need not be provided in the stretchable region 101b, and the portion of the display substrate 103 located in the stretchable region 101b does not need to be bonded to the portion of the second stretchable substrate 105 located in the stretchable region 101b.

[0201] In an embodiment of the present application, in the island-shaped display area 101a, the display substrate 103 is fixed between two stretchable substrates by a first adhesive layer 102 and a second adhesive layer 104. And no adhesive layer is provided in the stretching area 101b for fixing. Since the display panel is not fixed by adhesive in the vertical direction (third direction Z) perpendicular to the bearing surface of the stretchable substrate, after the display panel 100 is subjected to a tensile force, the portion of the display panel located in the stretching area 101b can generate strain in the vertical direction. In addition, the portion of the display panel located in the stretching area 101b can also be stretched in various directions on the surface of the first stretchable substrate 101 (such as the first direction X and the second direction Y perpendicular to each other). That is, the deformation flexibility of the display panel 100 is high, which increases the stretching amount of the display panel 100. Among them, multiple island-shaped display areas 101a can be arranged in an array in the first direction X and the second direction Y.

[0202] In summary, an embodiment of the present application provides a method for preparing a display panel, wherein for the island display area included in the first stretchable substrate in the display panel prepared by this method, the first adhesive layer connects the first stretchable substrate and the display substrate, and the second adhesive layer connects the second stretchable substrate and the display substrate, thereby fixing the display substrate between the first stretchable substrate and the second stretchable substrate. For the stretching area included in the first stretchable substrate in the display panel, no adhesive layer is provided to fix the display substrate. Thus, after the display panel is subjected to a stretching force, the portion of the display panel located in the stretching area can be stretched not only in various directions on the surface where the first stretchable substrate is located, but also in a direction perpendicular to the first stretchable substrate. That is, the deformation flexibility of the display panel is high, which increases the stretching amount of the display panel.

[0203] FIG33 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Referring to FIG33 , the display device includes: a power supply component 200 and a display panel 100 provided in the above embodiment. The power supply component 200 is connected to the display panel 100 to supply power to the display panel 100.

[0204] Alternatively, the display panel 100 may be an organic light emitting diode (OLED) display panel, and the display device may be an OLED display device. Alternatively, the display device may be any suitable display device, including but not limited to mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, navigation systems, and e-books, and any other product or component with a display function.

[0205] Since the display device can have substantially the same technical effects as the display panel described in the previous embodiment, the technical effects of the display device will not be repeatedly described here for the purpose of brevity.

[0206] The terms used in the embodiments of this application are only used to explain the embodiments of this application and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this application should have the common meaning understood by people with ordinary skills in the field to which this application belongs.

[0207] The terms used in the embodiments of this application are intended solely to illustrate the embodiments of this application and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in the embodiments of this application should have the same ordinary meaning as those understood by persons of ordinary skill in the art to which this application belongs. The terms "first," "second," "third," and similar terms used in this patent specification and claims do not denote any order, quantity, or importance, but are simply used to distinguish between different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one. Terms such as "include" or "comprising" and similar terms mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising," and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used solely to indicate relative positions. When the absolute position of the described objects changes, the relative positions may also change accordingly.

[0208] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: A first stretchable substrate, the first stretchable substrate comprising a plurality of island display areas, a stretching area connecting adjacent island display areas, and a hollow area between the island display areas and the stretching area; A display substrate, the display substrate comprising a plurality of display units, the display units being located in the island-shaped display area; a first adhesive layer located between the display substrate and the first stretchable substrate, wherein an orthographic projection of the first adhesive layer on the first stretchable substrate is located within an orthographic projection of the display unit on the first stretchable substrate; Also, a second adhesive layer located on a side of the display substrate away from the first stretchable substrate, and a second stretchable substrate located on a side of the second adhesive layer away from the display substrate, the orthographic projection of the second adhesive layer on the first stretchable substrate being within the orthographic projection of the display unit on the first stretchable substrate.

2. The display panel according to claim 1, characterized in that: The display unit comprises: a first flexible substrate, a display layer and an encapsulation film layer stacked in sequence in a direction away from the first stretchable substrate; Wherein, for each of the island-shaped display regions, the display substrate includes at least one display unit located in the island-shaped display region, and each of the display units includes a plurality of sub-pixels.

3. The display panel according to claim 2, characterized in that: The display substrate further comprises: a plurality of signal lines, a portion of each of the signal lines is located in the island-shaped display area, and another portion of each of the signal lines is located in the stretching area; The portion of the signal line located in the island-shaped display area is connected to the display layer of the display unit, and the signal line is used to transmit a driving signal provided by a driving circuit.

4. The display panel according to claim 3, characterized in that: The display substrate further includes: a second flexible substrate, a first flexible film layer and a second flexible film layer which are located in the stretching region and are sequentially stacked in a direction away from the first stretchable base; Wherein, the portion of the signal line located in the stretching area is located between the first flexible film layer and the second flexible film layer.

5. The display panel according to claim 2, characterized in that: The first flexible substrate has one or more first groove structures on a side close to the first stretchable base; A portion of the first adhesive layer is located in the first groove structure, a portion of the surface of the first adhesive layer close to the first flexible substrate is bonded to the inner wall of the first groove structure, and a surface of the first adhesive layer close to the first stretchable substrate is bonded to the first stretchable substrate.

6. The display panel according to claim 5, characterized in that: The first flexible substrate comprises a first area and a second area on a side close to the first stretchable base, wherein the first area is closer to the connection between the island display area and the stretching area than the second area; In the case where the first flexible substrate has a plurality of first groove structures on a side close to the first stretchable base, an arrangement density of the first groove structures in the first region is greater than an arrangement density of the first groove structures in the second region.

7. The display panel according to claim 5, characterized in that: The shape of the orthographic projection of each of the first groove structures on the first stretchable substrate is a circle, an ellipse, a square, a regular hexagon, or a rhombus.

8. The display panel according to claim 5, characterized in that: When the first flexible substrate has a plurality of first groove structures on a side close to the first stretchable base, the orthographic projections of the plurality of first groove structures on the first stretchable base have the same shape.

9. The display panel according to claim 5, characterized in that: When the first flexible substrate has a plurality of first groove structures on a side close to the first stretchable base, the center points of the orthographic projections of the plurality of first groove structures on the first stretchable base form a central symmetrical figure, and the center of symmetry of the central symmetrical figure is the center of the island-shaped display area.

10. The display panel according to claim 5, characterized in that: The depth of the first groove structure is 10% to 60% of the thickness of the first flexible substrate.

11. The display panel according to claim 5, characterized in that: The plurality of island-shaped display areas are arranged in an array in a first direction and a second direction; the shape of the orthographic projection of the first groove structure on the reference plane is one of a trapezoid, a semicircle, a semi-ellipse, and a T-shape; The reference plane is perpendicular to the supporting surface of the first stretchable substrate, and the reference plane is parallel to the first direction or the second direction.

12. The display panel according to claim 2, characterized in that: The packaging film layer has one or more second groove structures on a side away from the first stretchable substrate; A portion of the second adhesive layer is located in the second groove structure, a portion of the surface of the second adhesive layer close to the first flexible substrate is bonded to the inner wall of the second groove structure, and a surface of the second adhesive layer close to the second stretchable substrate is bonded to the second stretchable substrate.

13. The display panel according to claim 12, characterized in that: The encapsulation film layer comprises a first encapsulation layer, a second encapsulation layer and a third encapsulation layer stacked in sequence in a direction away from the first stretchable substrate; the materials of the first encapsulation layer and the third encapsulation layer are inorganic materials, and the material of the second encapsulation layer is organic material; The one or more second groove structures are located on a surface of the third encapsulation layer away from the first stretchable substrate; A distance between a surface of the second groove structure close to the first stretchable substrate and a surface of the third encapsulation layer close to the first stretchable substrate is greater than or equal to 600 nanometers.

14. The display panel according to any one of claims 1 to 13, characterized in that: The display panel also includes a fixed film layer; The fixed film layer is located in the island display area and between the first adhesive layer and the first stretchable substrate. The first adhesive layer is used to connect the fixed film layer and the first flexible substrate.

15. The display panel according to claim 14, characterized in that: In the case where the first flexible substrate has one or more first groove structures on a side close to the first stretchable base, the fixed film layer includes a fixed layer, and one or more protrusion structures located on a side of the fixed layer away from the first stretchable base and corresponding to the one or more first groove structures; The orthographic projection of each of the protruding structures on the first stretchable substrate is located within the orthographic projection of a corresponding one of the first groove structures on the first stretchable substrate.

16. The display panel according to claim 15, characterized in that: The height of the protrusion structure is less than the depth of the first groove structure; and the thickness of the fixed layer is greater than or equal to 1 micrometer.

17. The display panel according to any one of claims 2 to 13, characterized in that: The display layer includes: a blocking layer, a buffer layer, an active layer, a gate insulating layer, a gate layer, an interlayer dielectric layer, a source and drain electrode layer, a planar layer, an anode layer, a pixel defining layer, a light emitting layer and a cathode layer; The active layer includes an active pattern, and the active pattern includes a source region, a drain region and a channel region; The source-drain electrode layer comprises a source electrode and a drain electrode, the source electrode is connected to the source electrode region through a first via hole in the interlayer dielectric layer and the gate insulating layer, and the drain electrode is connected to the drain electrode region through a second via hole in the interlayer dielectric layer and the gate insulating layer; The gate layer includes a gate pattern, and the channel region is an overlapping area of ​​an orthographic projection of the gate pattern on the first stretchable substrate and an orthographic projection of the active pattern on the first stretchable substrate.

18. The display panel according to claim 17, characterized in that: The plurality of signal lines included in the display substrate are located in the source-drain electrode layer; the second flexible film layer included in the display substrate and the planar layer are located in the same layer.

19. A method for preparing a display panel, characterized in that: The method comprises: forming a display substrate on a glass substrate, wherein the display substrate comprises a plurality of display units; forming a temporary adhesive material and a protective film on a side of the display substrate away from the glass base; removing the glass substrate, and bonding a first stretchable substrate to a side of the display substrate away from the protective film using a first bonding layer; removing the temporary adhesive material and the protective film, and bonding the second stretchable substrate to a side of the display substrate away from the first stretchable substrate using a second adhesive layer; Wherein, the first stretchable substrate includes a plurality of island display areas, connecting adjacent island display areas. A stretching area of ​​the display area, and a hollow area between the island display area and the stretching area; the display unit is located in the island display area; the orthographic projection of the first adhesive layer on the first stretchable substrate is located within the orthographic projection of the display unit on the first stretchable substrate, and the orthographic projection of the second adhesive layer on the first stretchable substrate is located within the orthographic projection of the display unit on the first stretchable substrate.

20. The method according to claim 19, characterized in that The method of forming a display substrate on a glass substrate comprises: One or more protrusions are formed on the glass substrate, and a first flexible substrate film, a display film and a packaging film are formed on a side of the protrusions away from the glass substrate; Etching the first flexible substrate film, the display film and the packaging film to remove the first flexible substrate film, the display film and the packaging film located in the hollow area, to obtain the first flexible substrate, the display layer and the packaging film layer located in the island display area, and to obtain the second flexible substrate, the first flexible film layer and the second flexible film layer located in the stretching area; The method of removing the glass substrate and bonding the first stretchable substrate to a side of the display substrate away from the protective film using a first adhesive layer comprises: The glass substrate and the protrusions on the glass substrate are removed so that the side of the first flexible substrate away from the display layer has one or more first groove structures, and the first stretchable substrate is bonded to the side of the display substrate away from the protective film using a first adhesive layer, a portion of the first adhesive layer is located in the first groove structure, a portion of the surface of the first adhesive layer close to the first flexible substrate is bonded to the inner wall of the first groove structure, and the surface of the first adhesive layer close to the first stretchable substrate is bonded to the first stretchable substrate.

21. A display device, characterized in that: The display device comprises: a power supply component and a display panel according to any one of claims 1 to 18; The power supply component is connected to the display panel, and is used to supply power to the display panel.

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