Display panel and display device

Abstract

The present application relates to the technical field of display. Disclosed are a display panel and a display device. The display panel comprises a stretchable substrate, a flexible base, a pixel unit layer, a plurality of signal lines, and a fixing assembly. The fixing assembly is at least located in a connection region of the stretchable substrate, and is closer to an edge of the flexible base than the plurality of signal lines. When the display panel is stretched, the existence of the fixing assembly can relieve the tensile stress borne by a film layer at an edge position in the connection region, and avoid the tensile stress from being concentrated at the edge position of the connection region. In this way, signal lines close to the edge in the connection region can be prevented from being broken, thereby improving the reliability of the signal lines for transmitting driving signals, and thus increasing the yield of a display panel.

Description

Display panel and display device

[0001] This disclosure claims priority to Chinese Patent Application No. 202410789709.8, filed on June 18, 2024, entitled “Display Panel and Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0003] Organic light-emitting diode (OLED) display panels have advantages such as self-illumination, low driving voltage, and fast response. Compared to liquid crystal display panels, OLED display panels can be bent, making their application range wider. Furthermore, after years of technological accumulation, OLED display panels have gradually evolved from flexible products to foldable and even stretchable products. Summary of the Invention

[0004] This application provides a display panel and a display device, the technical solution of which is as follows:

[0005] On one hand, a display panel is provided, the display panel comprising:

[0006] A stretchable substrate, the stretchable substrate including an island-shaped display area, a stretchable area, a connecting area connecting the island-shaped display area and the stretchable area, and a cutout area located between the island-shaped display area and the stretchable area;

[0007] A flexible substrate, the flexible substrate comprising a first substrate portion, a connecting substrate portion and a second substrate portion connected in sequence, wherein the first substrate portion is located in the island-shaped display area, the connecting substrate portion is located in the connecting area, and the second substrate portion is located in the stretching area;

[0008] A pixel unit layer, the pixel unit layer comprising at least pixel units, the pixel unit layer being located on one side of the first substrate portion of the island-shaped display area;

[0009] Multiple signal lines are provided, each of which is located in the island-shaped display area, the stretching area, and the connecting area. The portion of the signal line located in the island-shaped display area is connected to the pixel unit. The portions of the signal line located in the connecting area and the stretching area are used to transmit driving signals provided by the driving circuit.

[0010] And a fixing component, the fixing component being located at least in the connection area, and the fixing component being closer to the edge of the flexible substrate relative to the plurality of signal lines;

[0011] Wherein, the distance between the side of the fixing component near the stretchable substrate and the stretchable substrate is less than the distance between the side of the plurality of signal lines near the stretchable substrate and the stretchable substrate, and the distance between the side of the fixing component away from the stretchable substrate and the stretchable substrate is greater than the distance between the side of the plurality of signal lines away from the stretchable substrate and the stretchable substrate.

[0012] Optionally, the connecting substrate portion has opposing first substrate edges and second substrate edges, and the fixing assembly includes a first type of fixing portion and a second type of fixing portion;

[0013] The orthographic projections of the first type of fixing part on the stretchable substrate and the orthographic projections of the second type of fixing part on the stretchable substrate are located on both sides of the orthographic projections of the plurality of signal lines on the stretchable substrate;

[0014] The first type of fixing part is located near the edge of the first substrate relative to the plurality of signal lines, and the second type of fixing part is located near the edge of the second substrate relative to the plurality of signal lines.

[0015] Optionally, each of the first type of fixing part and the second type of fixing part includes a plurality of fixing structures spaced apart. The plurality of fixing structures included in the first type of fixing part are arranged along the extension direction of the signal line near the edge of the first substrate, and the plurality of fixing structures included in the second type of fixing part are arranged along the extension direction of the signal line near the edge of the second substrate.

[0016] The distance between the side of each fixed structure closest to the stretchable substrate and the stretchable substrate is less than the distance between the side of the plurality of signal lines closest to the stretchable substrate and the stretchable substrate, and the distance between the side of each fixed structure furthest from the stretchable substrate and the stretchable substrate is greater than the distance between the side of the plurality of signal lines furthest from the stretchable substrate and the stretchable substrate.

[0017] Optionally, the radius of curvature of the edge of the first substrate is smaller than the radius of curvature of the edge of the second substrate;

[0018] The number of fixing structures included in the first type of fixing part in the fixing assembly located in the connection area is less than the number of fixing structures included in the second type of fixing part in the fixing assembly located in the connection area.

[0019] Optionally, the stretchable substrate includes a plurality of island-shaped display areas arranged in an array, and a plurality of stretchable areas for connecting the plurality of island-shaped display areas; the stretchable area includes at least a first sub-stretchable area and a second sub-stretchable area, the tangent of the first sub-stretchable edge of the first sub-stretchable area intersects the tangent of the second sub-stretchable edge of the second sub-stretchable area, and the stretchable area includes a corner area, the corner area including the area where the tangent of the first sub-stretchable edge and the tangent of the second sub-stretchable edge intersect;

[0020] The plurality of island-shaped display areas include adjacent first island-shaped display areas and second island-shaped display areas, and the plurality of stretching areas include a first stretching area located between the first island-shaped display area and the second island-shaped display area. One end of the first stretching area is connected to the first island-shaped display area through a connecting area, and the other end is connected to the second island-shaped display area through another connecting area.

[0021] The fixing component is also located in the corner area, and the fixing component is closer to the edge of the flexible substrate relative to the plurality of signal lines.

[0022] Optionally, the second substrate portion has opposing third substrate edges and fourth substrate edges, wherein the third substrate edge and the first substrate edge are continuous edges, and the fourth substrate edge and the second substrate edge are continuous edges;

[0023] The radius of curvature of the portion of the edge of the third substrate located in the corner region is greater than the radius of curvature of the portion of the edge of the fourth substrate located in the corner region.

[0024] The number of fixing structures included in the first type of fixing part of the fixing assembly located in the corner area is greater than the number of fixing structures included in the second type of fixing part of the fixing assembly located in the corner area.

[0025] Optionally, the arrangement span of the plurality of fixing structures in the first type of fixing part of the fixing assembly located in the corner region is greater than or equal to the curvature diameter of the portion of the edge of the third substrate located in the corner region;

[0026] The second type of fixing part in the fixing assembly located in the corner region includes a plurality of fixing structures with an arrangement span greater than or equal to the curvature diameter of the portion of the fourth substrate edge located in the corner region.

[0027] Optionally, the plurality of island display areas further include a third island display area located on the side of the second island display area away from the first island display area and adjacent to the second island display area; the plurality of stretching areas further include a second stretching area located between the second island display area and the third island display area.

[0028] Each of the first island-shaped display area, the second island-shaped display area, and the third island-shaped display area includes a first side, a second side, a third side, and a fourth side connected in sequence. The first side and the third side are arranged along a first direction, and the second side and the fourth side are arranged along a second direction. The second direction intersects with the first direction.

[0029] The first island-shaped display area, the second island-shaped display area, and the third island-shaped display area are arranged along the first direction; one end of the first stretching area is connected to the portion of the third side of the first island-shaped display area near the second side, and the other end is connected to the portion of the first side of the second island-shaped display area near the second side; one end of the second stretching area is connected to the portion of the third side of the second island-shaped display area near the fourth side, and the other end is connected to the portion of the first side of the third island-shaped display area near the fourth side;

[0030] Alternatively, the first island-shaped display area, the second island-shaped display area, and the third island-shaped display area are arranged along the second direction; one end of the first stretching area is connected to the portion of the fourth side of the first island-shaped display area near the third side, and the other end is connected to the portion of the second side of the second island-shaped display area near the third side; one end of the second stretching area is connected to the portion of the fourth side of the second island-shaped display area near the first side, and the other end is connected to the portion of the second side of the second island-shaped display area near the first side.

[0031] Optionally, each island-shaped area in the first island-shaped display area and the second island-shaped display area includes a first side, a second side, a third side, and a fourth side connected in sequence. The first side and the third side are arranged along the first direction, and the second side and the fourth side are arranged along the second direction, which intersects with the first direction.

[0032] The first stretching region and the second stretching region are arranged along the first direction. One end of the first stretching region is connected to the portion of the fourth side of the first island display region that is close to the third side, and the other end of the first stretching region is connected to the portion of the second side of the second island display region that is close to the first side.

[0033] Alternatively, the first stretching region and the second stretching region are arranged along the second direction, one end of the first stretching region is connected to the portion of the first side of the first island display region near the fourth side, and the other end of the first stretching region is connected to the portion of the third side of the second island display region near the second side.

[0034] Optionally, the shape of the orthographic projection of the fixing structure onto the flexible substrate is circular or elliptical.

[0035] Optionally, the display panel includes: a flexible film layer group located on one side of the connecting substrate portion and the second substrate portion; the flexible film layer group includes at least a first flexible insulating layer and a second flexible insulating layer, and the plurality of signal lines are located between the first flexible insulating layer and the second flexible insulating layer;

[0036] The first flexible insulating layer has a first through hole, the second flexible insulating layer has a second through hole communicating with the first through hole, a portion of the fixing component is located within the first through hole and the second through hole, and another portion of the fixing component protrudes from the surface of the second flexible insulating layer away from the stretchable substrate;

[0037] The second via penetrates the second flexible insulating layer, and the depth of the first via is less than or equal to the thickness of the first flexible insulating layer.

[0038] Optionally, when the depth of the first via is equal to the thickness of the first flexible insulating layer, the first via is used to expose a target area of ​​the second substrate portion, and the fixing assembly contacts the target area on the side near the stretchable substrate.

[0039] Optionally, the display panel further includes: a dummy trace located on the same layer as the plurality of signal lines and close to the edge of the flexible substrate relative to the plurality of signal lines;

[0040] The orthographic projection of the second via on the stretchable substrate is located within the orthographic projection of the dummy trace on the stretchable substrate, and the area of ​​the second via on the orthographic projection of the stretchable substrate is smaller than the area of ​​the orthographic projection of the dummy trace on the stretchable substrate.

[0041] The orthographic projection of the first via on the stretchable substrate is located within the orthographic projection of the dummy trace on the stretchable substrate, and the area of ​​the orthographic projection of the first via on the stretchable substrate is smaller than the area of ​​the orthographic projection of the dummy trace on the stretchable substrate.

[0042] The dummy trace has a third via, and a portion of the fixing component is located within the third via.

[0043] Optionally, the size of the second via on the side closer to the stretchable substrate is smaller than the size of the second via on the side farther from the stretchable substrate; the area of ​​the orthographic projection of the side of the second via on the stretchable substrate that is farther from the stretchable substrate is smaller than the area of ​​the orthographic projection of the dummy trace on the stretchable substrate.

[0044] The size of the first via on the side closer to the stretchable substrate is smaller than the size of the first via on the side farther from the stretchable substrate; the area of ​​the orthographic projection of the side of the first via on the stretchable substrate that is farther from the stretchable substrate is smaller than the area of ​​the orthographic projection of the dummy trace on the stretchable substrate.

[0045] Optionally, the line width of the dummy trace is 1 to 2 times the line width of the target signal line among the multiple signal lines;

[0046] The target signal line is the signal line with the largest line width among the multiple signal lines.

[0047] Optionally, the height of the portion of the fixing component protruding from the surface of the second flexible insulating layer away from the stretchable substrate ranges from 1 micrometer to 2 micrometers;

[0048] When the fixing component includes a first type of fixing part and a second type of fixing part, and each type of fixing part includes a plurality of fixing structures arranged at intervals, the width of the orthographic projection of the fixing structure on the flexible substrate ranges from 5 micrometers to 20 micrometers, and the spacing between two adjacent fixing structures ranges from 10 micrometers to 20 micrometers.

[0049] Optionally, the pixel unit layer includes: a blocking layer, a buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a source-drain layer, a second planarization layer, an anode layer, a pixel defining layer, a light-emitting layer, and a cathode layer.

[0050] The active layer includes an active pattern, which includes a source region, a drain region, and a channel region.

[0051] The source-drain layer includes a source and a drain. The source is connected to the source region through the interlayer dielectric layer, the second gate insulating layer, and a fourth via in the first gate insulating layer. The drain is connected to the drain region through the interlayer dielectric layer, the second gate insulating layer, and a fifth via in the first gate insulating layer.

[0052] The first gate layer includes a first gate pattern, and the channel region is the overlapping area of ​​the orthographic projection of the first gate pattern on the flexible substrate and the orthographic projection of the active pattern on the flexible substrate.

[0053] Optionally, the multiple signal lines are located in the source-drain layer, the second flexible insulating layer and the second planarization layer are located in the same layer, and the first flexible insulating layer is the first planarization layer;

[0054] The distance between the first flexible insulating layer and the surface of the interlayer dielectric layer away from the surface of the flexible substrate in a third direction is less than a distance threshold, wherein the third direction is a direction perpendicular to the bearing surface of the flexible substrate.

[0055] Optionally, the fixing component and the pixel defining layer are located on the same layer.

[0056] Optionally, the display panel further includes: an encapsulation film layer;

[0057] The encapsulation film layer is located in the island-shaped display area, the stretching area, and the connecting area. The encapsulation film layer is used to encapsulate the pixel unit layer, the multiple signal lines, and the fixing components.

[0058] On the other hand, a display device is provided, the display device comprising: a power supply component and a display panel as described above;

[0059] The power supply component is connected to the display panel, and the power supply component is used to supply power to the display panel. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of this application;

[0062] Figure 2 is a partial top view of a stretchable substrate provided in an embodiment of this application;

[0063] Figure 3 is a partial top view of a stretchable substrate, a flexible substrate, and a pixel unit layer provided in an embodiment of this application.

[0064] Figure 4 is a partial schematic diagram of region A in Figure 3;

[0065] Figure 5 is a cross-sectional view of Figure 4 along the BB' direction;

[0066] Figure 6 is a partial top view of a flexible substrate provided in an embodiment of this application;

[0067] Figure 7 is another partial schematic diagram of region A in Figure 3;

[0068] Figure 8 is a partial schematic diagram of a flexible substrate, signal lines, and fixing components provided in an embodiment of this application;

[0069] Figure 9 is a partial schematic diagram of another flexible substrate, signal lines, and fixing components provided in an embodiment of this application;

[0070] Figure 10 is a partial schematic diagram of another flexible substrate, signal lines, and fixing components provided in an embodiment of this application;

[0071] Figure 11 is a schematic diagram of a stretching region and a connecting region provided in an embodiment of this application;

[0072] Figure 12 is a structural schematic diagram of a corner region of a stretching region provided in an embodiment of this application;

[0073] Figure 13 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0074] Figure 14 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0075] Figure 15 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0076] Figure 16 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0077] Figure 17 is a schematic diagram of a first island display area, a first stretchable area, a second island display area, a second stretchable area, and a third island display area provided in an embodiment of this application.

[0078] Figure 18 is a schematic diagram of another first island display area, a first stretching area, a second island display area, a second stretching area, and a third island display area provided in an embodiment of this application.

[0079] Figure 19 is a partial top view of an island-shaped display area and a stretched display area provided in an embodiment of this application;

[0080] Figure 20 is a partial cross-sectional view of a corner region of a stretching region provided in an embodiment of this application;

[0081] Figure 21 is a partial schematic diagram of a corner region of a stretching region provided in an embodiment of this application;

[0082] Figure 22 is a cross-sectional view of Figure 21 along the CC' direction;

[0083] Figure 23 is a partial top view of a display panel provided in an embodiment of this application;

[0084] Figure 24 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0085] Figure 25 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0086] Figure 26 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0087] Figure 27 is a schematic diagram of another stretching region and connecting region provided in an embodiment of this application;

[0088] Figure 28 is a cross-sectional view of Figure 23 along the DD' direction;

[0089] Figure 29 is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0090] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0091] In some embodiments, the OLED display panel includes multiple island-shaped display areas and a stretched region located between adjacent island-shaped display areas. The stretched region can withstand a certain deformation to achieve the stretching of the entire display panel. The two ends of the stretched region are respectively connected to two adjacent island-shaped display areas, and the area of ​​the OLED display panel other than the island-shaped display areas and the stretched region is a cutout area. Typically, various signal lines need to be laid on the stretched region to connect the signal lines to the pixel units of different island-shaped display areas, thereby realizing signal transmission.

[0092] However, when OLED display panels are stretched, the edges where the stretching area and the island display area are connected are subjected to greater stress. The film layer at this point is prone to tearing and cracking, which in turn causes the signal lines laid on the stretching area to break, resulting in a low yield of the display panel.

[0093] This application provides a display panel. Referring to FIG1, the display panel 100 includes: a stretchable substrate 101, a flexible substrate 102, a pixel unit layer 103, multiple signal lines 104, and a fixing component 105.

[0094] Figure 2 is a partial top view of a stretchable substrate provided in an embodiment of this application. Referring to Figure 2, it can be seen that the stretchable substrate 101 includes an island-shaped display area 101a, a stretchable area 101b, a connecting area 101c connecting the island-shaped display area 101a and the stretchable area 101b, and a hollow area 101d located between the island-shaped display area 101a and the stretchable area 101b.

[0095] Figure 3 is a partial top view of a stretchable substrate, a flexible substrate, and a pixel unit layer provided in an embodiment of this application. Figure 1 can be a cross-sectional view of Figure 3 along the AA' direction. Referring to Figures 1 to 3, the flexible substrate 102 includes a first substrate portion 1021, a connecting substrate portion 1022, and a second substrate portion 1023 connected in sequence. The first substrate portion 1021 is located in the island-shaped display area 101a, the connecting substrate portion 1022 is located in the connecting area 101c, and the second substrate portion 1023 is located in the stretching area 101b. That is, the flexible substrate 102 may not be located in the hollowed-out area 101d.

[0096] Referring to Figure 3, it can also be seen that the pixel unit layer 103 includes at least pixel units 1031, and the pixel unit layer 103 is located on one side of the first substrate portion 1021 of the island display area 101a.

[0097] Figure 4 is a partial schematic diagram of region A in Figure 3. Figure 5 is a cross-sectional view of Figure 4 along the BB' direction. Referring to Figures 4 and 5, it can be seen that each of the multiple signal lines 104 included in the display panel 100 can be located in the island-shaped display area 101a, the stretched area 101b, and the connecting area 101c. The portion of the signal line 104 located in the island-shaped display area 101a is connected to the pixel unit 1031, and the portions of the signal line 104 located in the connecting area 101c and the stretched area 101b are used to transmit the driving signals provided by the driving circuit.

[0098] Referring to Figures 1 to 5, it can also be seen that the fixing component 105 can be located in the connection region 101c, and the fixing component 105 is closer to the edge of the flexible substrate 102 than the multiple signal lines 104. Therefore, when the display panel 100 is stretched, the presence of the fixing component 105 can alleviate the tensile stress on the film layer at the edge of the connection region 101c, preventing the tensile stress from concentrating at the edge of the connection region 101c. This can prevent the signal lines 104 near the edge of the connection region 101c from breaking, improve the reliability of the signal lines 104 transmitting drive signals, and thus improve the yield of the display panel 100.

[0099] Referring to Figure 5, the distance h1 between the side of the fixing component 105 near the stretchable substrate 101 and the stretchable substrate 101 is smaller than the distance h2 between the side of the multiple signal lines 104 near the stretchable substrate 101 and the stretchable substrate 101. The distance h3 between the side of the fixing component 105 away from the stretchable substrate 101 and the stretchable substrate 101 is greater than the distance h4 between the side of the multiple signal lines 104 away from the stretchable substrate 101 and the stretchable substrate 101. That is, the side of the fixing component 105 near the flexible substrate 102 can be embedded in the film layer between the signal lines 104 and the flexible substrate 102, and the other side can protrude from the side of the signal lines 104 away from the flexible substrate 102. Thus, the fixing component 105 can be stably formed within the film layer of the display panel 100, ensuring the reinforcement effect of the fixing component 105.

[0100] In summary, this application provides a display panel including a stretchable substrate, a flexible substrate, a pixel unit layer, multiple signal lines, and a fixing component. The fixing component is located at least in the connection area of ​​the stretchable substrate and is closer to the edge of the flexible substrate than the multiple signal lines. When the display panel is stretched, the presence of the fixing component can alleviate the tensile stress on the film layer at the edge of the connection area, preventing the tensile stress from concentrating at the edge of the connection area. This avoids breakage of the signal lines near the edge of the connection area, improves the reliability of signal transmission driving signals, and thus improves the yield of the display panel.

[0101] Referring to Figure 6, the connecting substrate portion 1022 has opposing first substrate edges 1022a and second substrate edges 1022b. Combining Figures 4 to 6, the fixing assembly 105 includes a first type of fixing portion 1051 and a second type of fixing portion 1052. The orthographic projection of the first type of fixing portion 1051 onto the stretchable substrate 101 and the orthographic projection of the second type of fixing portion 1052 onto the stretchable substrate 101 are located on opposite sides of the orthographic projections of the plurality of signal lines 104 onto the stretchable substrate 101.

[0102] In this design, the first type of fixing part 1051 is located near the first substrate edge 1022a (which can be the inner edge of the connecting substrate portion 1022) relative to the multiple signal lines 104, and the second type of fixing part 1052 is located near the second substrate edge 1022b (which can be the outer edge of the connecting substrate portion 1022) relative to the multiple signal lines 104. That is, fixing parts are designed on both edges of the connecting substrate portion 1022. When the display panel 100 is stretched, the first type of fixing part 1051 can alleviate the tensile stress on the film layer at the first substrate edge 1022a, and the second type of fixing part 1052 can alleviate the tensile stress on the film layer at the second substrate edge 1022b. This avoids the concentration of tensile stress at the first substrate edge 1022a and the second substrate edge 1022b, thereby preventing the signal line 104 near the first substrate edge 1022a and the second substrate edge 1022b in the connection area 101c from breaking, improving the reliability of the signal line 104 in transmitting the driving signal, and thus improving the yield of the display panel 100.

[0103] Figure 7 is another partial schematic diagram of region A in Figure 3. Referring to Figure 7, each of the first type of fixing part 1051 and the second type of fixing part 1052 includes a plurality of fixing structures 105a spaced apart. The plurality of fixing structures 105a included in the first type of fixing part 1051 are arranged along the extension direction of the signal line 104 near the edge 1022a of the first substrate. The plurality of fixing structures 105a included in the second type of fixing part 1052 are arranged along the extension direction of the signal line 104 near the edge 1022b of the second substrate.

[0104] Referring to Figures 7 and 8, if the signal line 104 near the first substrate edge 1022a extends in the direction of the first substrate edge 1022a, then the plurality of fixing structures 105a included in the first type of fixing part 1051 are arranged approximately along the direction of the first substrate edge 1022a. If the signal line 104 near the second substrate edge 1022b extends in the direction of the second substrate edge 1022b, then the plurality of fixing structures 105a included in the second type of fixing part 1052 are arranged approximately along the direction of the second substrate edge 1022b.

[0105] Alternatively, referring to Figures 9 and 10, if the extension direction of the signal line 104 near the first substrate edge 1022a is not the direction of the first substrate edge 1022a, then the plurality of fixing structures 105a included in the first type of fixing part 1051 are arranged along the extension direction of the signal line 104 near the first substrate edge 1022a. If the extension direction of the signal line 104 near the second substrate edge 1022b is not the direction of the second substrate edge 1022b, then the plurality of fixing structures 105a included in the second type of fixing part 1052 are arranged along the extension direction of the signal line 104 near the second substrate edge 1022b.

[0106] In this embodiment, when the fixing component 105 includes multiple fixing structures 105a, the distance between the side of each fixing structure 105a closest to the stretchable substrate 101 and the stretchable substrate 101 is less than the distance between the side of each signal line 104 closest to the stretchable substrate 101 and the stretchable substrate 101. The distance between the side of each fixing structure 105a furthest from the stretchable substrate 101 and the stretchable substrate 101 is greater than the distance between the side of each signal line 104 furthest from the stretchable substrate 101 and the stretchable substrate 101. That is, the side of each fixing structure 105a closest to the flexible substrate 102 can be embedded into the film layer between the signal line 104 and the flexible substrate 102, and the other side can protrude from the side of the signal line 104 furthest from the flexible substrate 102. Therefore, the fixing structure 105a can be stably formed within the film layer of the display panel 100, ensuring the reinforcement effect of the fixing structure 105a.

[0107] Furthermore, the multiple fixing structures 105a are spaced apart, preventing them from interfering with each other. During the stretching process of the display panel 100, the localized tensile stress is confined to the area where the fixing structure 105a is located, and is not transmitted along the direction of the integral fixing part, thus avoiding stress concentration. This further prevents signal line 104 breakage due to stress concentration, improving the yield of the display panel. Moreover, the discontinuous fixing structure 105a provides better buffering during third-direction Z-deformation.

[0108] In this embodiment of the application, referring to FIG6, the radius of curvature of the first substrate edge 1022a is smaller than the radius of curvature of the second substrate edge 1022b. In this case, the first substrate edge 1022a can be referred to as the inner edge of the connecting substrate portion 1022, and the second substrate edge 1022b can be referred to as the outer edge of the connecting substrate portion 1022.

[0109] Since the radius of curvature of the first substrate edge 1022a is smaller than that of the second substrate edge 1022b, the length of the first substrate edge 1022a is smaller than that of the second substrate edge 1022b. Typically, in order for the fixing structure 105a included in the fixing assembly 105 to reinforce the connecting region 101c, the edges of the connecting region 101c need to be designed with fixing structures 105a that are substantially uniform. Therefore, the number of fixing structures 105a included in the fixing part can be positively correlated with the length of the edge of the connecting region 101c (i.e., the number of fixing structures 105a included in the fixing part can be positively correlated with the radius of curvature of the edge of the connecting region 101c).

[0110] When the dimensions of the fixing structure 105a included in the first type of fixing part 1051 are the same as the dimensions of the fixing structure 105a included in the second type of fixing part 1052, and the spacing between adjacent fixing structures 105a in the first type of fixing part 1051 and the spacing between adjacent fixing structures 105a in the second type of fixing part 1052 are the same, the number of fixing structures 105a included in the first type of fixing part 1051 in the fixing assembly 105 located in the connection region 101c is less than the number of fixing structures 105a included in the second type of fixing part 1052 in the fixing assembly 105 located in the connection region 101c.

[0111] In this embodiment, besides the connecting area 101c being a weak area of ​​tensile stress, the tensile area 101b, when it has a specific shape, also includes some weak areas that require fixing components 105 to reduce the impact of tensile stress on these weak areas. The weak area of ​​tensile stress refers to the area experiencing relatively high tensile stress during the stretching process of the display panel 100.

[0112] Optionally, the specific shape of the tensile region 101b can mean that the tensile region 101b includes at least a first sub-tensile region and a second sub-tensile region. The tangent of the first sub-tensile edge 101bz11 of the first sub-tensile region intersects the tangent of the second sub-tensile edge 101bz21 of the second sub-tensile region. The tensile region 101b includes a corner region G, which is the area where the tangent of the first sub-tensile edge 101bz11 and the tangent of the second sub-tensile edge 101bz21 intersect. The corner region G is a weak area for tensile stress.

[0113] For example, referring to Figures 11 and 12, the shape of the stretching region 101b is U-shaped. In this case, the stretching region 101b also includes a third sub-stretching region 101bz3. The first sub-stretching region 101bz1, the second sub-stretching region 101bz2, and the third sub-stretching region 101bz3 are connected sequentially. The first sub-stretching region 101bz1 and the third sub-stretching region 101bz3 are both strip-shaped regions. The second sub-stretching region 101bz2 is a U-shaped region with a curved bottom. The tangent of the first sub-stretching edge 101bz11 of the first sub-stretching region 101bz1 (tangent 5 in Figure 11) extends along the extension direction of the first sub-stretching edge 101bz11. The tangent of the second sub-stretching edge 101bz21 of the second sub-stretching region 101bz2 includes multiple tangents at different positions of the second sub-stretching edge 101bz21, with different directions for each tangent. For example, tangents 1, 2, 3, and 4 in Figure 11 are multiple tangents of the second sub-stretched edge 101bz21 at different positions. Of course, in addition to the four tangents mentioned above, there are tangents at other positions as well. The tangent of the third sub-stretched edge 101bz31 of the third sub-stretched region 101bz3 extends along the extension direction of the third sub-stretched edge 101bz31. That is, multiple tangents of the second sub-stretched region 101bz2 intersect with the tangent of the first sub-stretched edge 101bz11 and also with the tangent of the third sub-stretched edge 101bz31. In this case, the second sub-stretched region 101bz2 is the corner region G.

[0114] Alternatively, referring to Figure 13, the shape of the stretching region 101b is V-shaped. In this case, the tangent of the first sub-stretching edge 101bz11 of the first sub-stretching region 101bz1 extends along the extension direction of the first sub-stretching edge 101bz11. The tangent of the second sub-stretching edge 101bz21 of the second sub-stretching region 101bz2 extends along the extension direction of the second sub-stretching edge 101bz21. That is, the extension direction of the first sub-stretching region 101bz1 intersects the extension direction of the second sub-stretching region 101bz2. In this case, the boundary region between the first sub-stretching region 101bz1 and the second sub-stretching region 101bz2 is the corner region G.

[0115] Alternatively, referring to Figure 14, the stretching region 101b is S-shaped. The S-shaped stretching region 101b is roughly equivalent to two U-shaped stretching regions 101b joined together, and the two U-shaped stretching regions 101b share a sub-stretching region. In this case, the stretching region 101b includes two corner regions G, which are the two curved regions of the S-shaped stretching region.

[0116] Alternatively, referring to Figure 15, the stretching region 101b is Z-shaped. The Z-shaped stretching region 101b is roughly equivalent to two V-shaped stretching regions 101b joined together, with the two V-shaped stretching regions 101b sharing a single sub-stretching region. In this case, the stretching region 101b includes two corner regions G, which are the two boundary regions of the Z-shaped stretching region.

[0117] Alternatively, the shape of the stretched region 101b may be a partially convex type, such as in Figure 16, where the two edges in the middle of the stretched region 101b convex away from the stretched region 101b and towards the hollowed-out region 101d. In this case, the stretched region 101b also includes a third sub-stretched region 101bz3. The first sub-stretched region 101bz1, the second sub-stretched region 101bz2, and the third sub-stretched region 101bz3 are connected sequentially. The first sub-stretched region 101bz1 and the third sub-stretched region 101bz3 are both strip-shaped regions. The second sub-stretched region 101bz2 is an arc-shaped convex region in the middle. The tangent (such as tangent 5) of the first sub-stretched edge 101bz11 of the first sub-stretched region 101bz1 extends along the extension direction of the first sub-stretched edge 101bz11. The tangents of the second sub-stretched edge 101bz21 of the second sub-stretched region 101bz2 include multiple tangents at different positions of the second sub-stretched edge 101bz21, with different directions. For example, tangents 1, 2, 3, and 4 in Figure 16 are multiple tangents of the second sub-stretched edge 101bz21 at different positions. Of course, in addition to the above four tangents, tangents at other positions are also included. The tangents of the third sub-stretched edge 101bz31 of the third sub-stretched region 101bz3 extend along the extension direction of the third sub-stretched edge 101bz31. That is, multiple tangents of the second sub-stretched region 101bz2 intersect with the tangents of the first sub-stretched edge 101bz11 and the tangents of the third sub-stretched edge 101bz31. In this case, the boundary region between the second sub-stretched region 101bz2 and the first sub-stretched region 101bz1, and the boundary region between the second sub-stretched region 101bz2 and the third sub-stretched region 101bz3, is the corner region G.

[0118] In this embodiment, the shape of the tension region 101b can be other than the shape described in the above embodiments. This embodiment does not limit this; it is sufficient to provide a fixing component 105 in the weak area of ​​the tension region 101b.

[0119] Taking the stretched region 101b as a U-shaped region as an example, referring to Figure 17, the multiple island-shaped display regions 101a include adjacent first island-shaped display regions 101a1 and second island-shaped display regions 101a2. The multiple stretched regions 101b include a first stretched region 101b1 located between the first island-shaped display region 101a1 and the second island-shaped display region 101a2. One end of the first stretched region 101b1 is connected to the first island-shaped display region 101a1 via a connecting region 101c, and the other end is connected to the second island-shaped display region 101a2 via another connecting region 101c. The fixing component 105 is also located in the corner region G, and the fixing component 105 is closer to the edge of the flexible substrate 102 relative to the multiple signal lines 104.

[0120] Referring to Figure 6, the second substrate portion 1023 has opposing third substrate edges 1023a and fourth substrate edges 1023b. The third substrate edge 1023a and the first substrate edge 1022a are continuous edges, and the fourth substrate edge 1023b and the second substrate edge 1022b are continuous edges. The term "two substrate edges are continuous edges" can be used to indicate two substrate edges that can be joined together.

[0121] Optionally, the fixing component 105 includes a first type of fixing portion 1051 near the third substrate edge 1023a relative to the plurality of signal lines 104, and the fixing component 105 includes a second type of fixing portion 1052 near the fourth substrate edge 1023b relative to the plurality of signal lines 104.

[0122] Optionally, the radius of curvature of the portion of the third substrate edge 1023a located in the corner region G is greater than the radius of curvature of the portion of the fourth substrate edge 1023b located in the corner region G. In this case, the portion of the third substrate edge 1023a located in the corner region G can be referred to as the outer edge of the corner region G, and the portion of the fourth substrate edge 1023b located in the corner region G can be referred to as the inner edge of the corner region G.

[0123] Since the radius of curvature of the third substrate edge 1023a is smaller than that of the fourth substrate edge 1023b, the length of the third substrate edge 1023a is greater than that of the fourth substrate edge 1023b. Typically, in order for the fixing structure 105a included in the fixing assembly 105 to reinforce the corner region G, the edges of the corner region G should be designed with fixing structures 105a that are essentially uniformly distributed. Therefore, the number of fixing structures 105a included in the fixing part can be positively correlated with the length of the edge of the corner region G (i.e., the number of fixing structures 105a included in the fixing part can be positively correlated with the radius of curvature of the edge of the corner region G).

[0124] When the dimensions of the fixing structure 105a included in the first type of fixing part 1051 are the same as the dimensions of the fixing structure 105a included in the second type of fixing part 1052, and the spacing between adjacent fixing structures 105a in the first type of fixing part 1051 and the spacing between adjacent fixing structures 105a in the second type of fixing part 1052 are the same, the number of fixing structures 105a included in the first type of fixing part 1051 in the fixing assembly 105 located in the corner region G is greater than the number of fixing structures 105a included in the second type of fixing part 1052 in the fixing assembly 105 located in the corner region G.

[0125] Furthermore, to ensure the reinforcement effect of the fixing component 105 on the corner region G, the span of the first type of fixing part 1051 located in the corner region G is generally required to be greater than or equal to the curvature diameter of the third substrate edge 1023a, and the span of the second type of fixing part 1052 located in the corner region G is greater than or equal to the curvature diameter of the fourth substrate edge 1023b. The span can refer to the distance between the two ends of the fixing part. For example, in Figure 12, the span of the first type of fixing part 1051 is represented by d.

[0126] Optionally, when the first type of fixing part 1051 and the second type of fixing part 1052 include multiple fixing structures 105a, the arrangement span of the multiple fixing structures 105a included in the first type of fixing part 1051 in the fixing assembly 105 located in the corner region G is greater than or equal to the curvature diameter of the portion of the third substrate edge 1023a located in the corner region G. The arrangement span of the multiple fixing structures 105a included in the second type of fixing part 1052 in the fixing assembly 105 located in the corner region G is greater than or equal to the curvature diameter of the portion of the fourth substrate edge 1023b located in the corner region G.

[0127] By limiting the span and curvature diameter, the tensile stress on the film layer at the edge of the corner region G can be greatly alleviated, further preventing the signal line 104 from breaking.

[0128] In this embodiment of the application, referring to FIG17, each of the plurality of island-shaped display areas 101a includes a first side c1, a second side c2, a third side c3, and a fourth side c4 connected in sequence. The first side c1 and the third side c3 are arranged along a first direction X, and the second side c2 and the fourth side c4 are arranged along a second direction Y. The second direction Y intersects with the first direction X.

[0129] In the case where the stretching area 101b includes a corner area G (for example, the shape of the stretching area 101b is U-shaped or V-shaped), in order to avoid the connection between the side edges of a row or column of stretching areas 101b and the side edges of the island display area 101a that are close to each other, which would lead to excessive force differences on different sides of the island display area 101a and cause it to tip over, the adjacent stretching areas 101b can be connected to the side edges of different sides of the island display area 101a.

[0130] Optionally, referring to FIG17, the plurality of island-shaped display areas 101a further includes a third island-shaped display area 101a3 located on the side of the second island-shaped display area 101a2 away from the first island-shaped display area 101a1 and adjacent to the second island-shaped display area 101a2. The plurality of stretchable areas 101b further includes a second stretchable area 101b2 located between the second island-shaped display area 101a2 and the third island-shaped display area 101a3.

[0131] In the case where the first island display area 101a1, the second island display area 101a2, and the third island display area 101a3 are arranged along the first direction X, in order to connect the first stretching area 101b1 and the second stretching area 101b2 to the sides of different sides of the island display area 101a1, the design can be as follows: one end of the first stretching area 101b1 is connected to the portion of the third side c3 of the first island display area 101a1 near the second side c2, and the other end is connected to the portion of the first side c1 of the second island display area 101a2 near the second side c2. One end of the second stretching area 101b2 is connected to the portion of the third side c3 of the second island display area 101a2 near the fourth side c4, and the other end is connected to the portion of the first side c1 of the third island display area 101a3 near the fourth side c4.

[0132] In this case, the second sub-stretch region 101bz2 included in the first stretching region 101b1 is closer to the fourth side c4 relative to the second side c2, and the second sub-stretch region 101bz2 included in the second stretching region 101b2 is closer to the second side c2 relative to the fourth side c4. That is, the opening orientation of the first stretching region 101b1 is opposite to the opening orientation of the second stretching region 101b2.

[0133] Alternatively, referring to Figure 18, when the first island display area 101a1, the second island display area 101a2, and the third island display area 101a3 are arranged along the second direction Y, in order to connect the first stretching area 101b1 and the second stretching area 101b2 to the sides of different sides of the island display area 101a1, the design can be as follows: one end of the first stretching area 101b1 is connected to the portion of the fourth side c4 of the first island display area 101a1 near the third side c3, and the other end is connected to the portion of the second side c2 of the second island display area 101a2 near the third side c3. One end of the second stretching area 101b2 is connected to the portion of the fourth side c4 of the second island display area 101a2 near the first side c1, and the other end is connected to the portion of the second side c2 of the third island display area 101a3 near the first side c1.

[0134] In this case, the second sub-stretching region 101bz2 included in the first stretching region 101b1 is closer to the first side c1 relative to the third side c3, and the second sub-stretching region 101bz2 included in the second stretching region 101b2 is closer to the third side c3 relative to the first side c1. That is, the opening orientation of the first stretching region 101b1 is opposite to the opening orientation of the second stretching region 101b2.

[0135] In the embodiments of this application, when the stretching region 101b includes two corner regions G (for example, the shape of the stretching region 101b is S-shaped or Z-shaped), the two sides of the two island-shaped display regions 101a connected by the stretching region 101b can be opposite each other in the first direction X or the second direction Y to achieve uniform stress in the structure, and to ensure the uniformity of stress on different sides of the island-shaped display regions 101a as much as possible.

[0136] Optionally, referring to region B of Figure 19, when the first island display area 101a1 and the second island display area 101a2 are arranged along the first direction X, the design can be as follows: one end of the first stretching area 101b1 is connected to the portion of the fourth side c4 of the first island display area 101a1 near the third side c3, and the other end of the first stretching area 101b1 is connected to the portion of the second side c2 of the second island display area 101a2 near the first side c1. That is, the two ends of the first stretching area 101b1 are respectively connected to the two opposite sides of the two island display areas 101a in the second direction Y. One of the two opposite sides of the two island display areas 101a in the second direction Y is the second side c2 of one island display area 101a, and the other side is the fourth side c4 of the other island display area 101a.

[0137] In this case, of the two corner regions G included in the first stretching region 101b1, the first corner region G1 is closer to the first island display region 101a1 relative to the second island display region 101a2, and the second corner region G2 is closer to the second island display region 101a2 relative to the first island display region 101a1. In the second direction Y, the first corner region G1 is closer to the fourth side c4 relative to the second side c2 of the first island display region 101a1, and the second corner region G2 is closer to the second side c2 relative to the fourth side c4 of the second island display region 101a2. That is, in the second direction Y, the length of the first stretching region 101b1 is greater than the length of the island display region 101a.

[0138] Alternatively, referring to region C of Figure 19, when the first stretched region 101b1 and the second stretched region 101b2 are arranged along the second direction Y, the design can be as follows: one end of the first stretched region 101b1 is connected to the portion of the first side c1 of the first island display region 101a1 near the fourth side c4. The other end of the first stretched region 101b1 is connected to the portion of the third side c3 of the second island display region 101a2 near the second side c2. That is, both ends of the first stretched region 101b1 are respectively connected to the two opposite sides of the two island display regions 101a in the first direction X. One of the two opposite sides of the two island display regions 101a in the first direction X is the first side c1 of one island display region 101a, and the other side is the third side c3 of the other island display region 101a.

[0139] In this case, of the two corner regions G included in the first stretching region 101b1, the first corner region G1 is closer to the first island display region 101a1 relative to the second island display region 101a2, and the second corner region G2 is closer to the second island display region 101a2 relative to the first island display region 101a1. In the first direction X, the first corner region G1 is closer to the first side c1 relative to the third side c3 of the first island display region 101a1, and the second corner region G2 is closer to the third side c3 relative to the first side c1 of the second island display region 101a2. That is, in the first direction X, the length of the first stretching region 101b1 is greater than the length of the island display region 101a.

[0140] Referring to Figure 5, the display panel 100 includes a flexible film layer group 106 located on one side connecting the substrate portion 1022 and the second substrate portion 1023. The flexible film layer group 106 includes at least a first flexible insulating layer 1061 and a second flexible insulating layer 1062. Multiple signal lines 104 are located between the first flexible insulating layer 1061 and the second flexible insulating layer 1062.

[0141] The first flexible insulating layer 1061 has a first through hole K1, and the second flexible insulating layer 1062 has a second through hole K2 communicating with the first through hole K1. A portion of the fixing component 105 is located within the first through hole K1 and the second through hole K2, and another portion of the fixing component 105 protrudes from the surface of the second flexible insulating layer 1062 away from the surface of the stretchable substrate 101.

[0142] The second through-hole K2 penetrates the second flexible insulating layer 1062, and the depth of the first through-hole K1 is less than or equal to the thickness of the first flexible insulating layer 1061. That is, the fixing component 105 can pass through the second flexible insulating layer 1062 and be embedded inside the first flexible insulating layer 1061. This ensures the reliability of the fixing component 105.

[0143] Optionally, referring to FIG20, if the depth of the first via K1 is equal to the thickness of the first flexible insulating layer 1061, the first via K1 is used to expose a target area of ​​the second substrate portion 1023. The fixing assembly 105 contacts the target area on the side near the stretchable substrate 101.

[0144] Furthermore, during the stretching process of the display panel 100, the main body being stretched is the flexible substrate 102. Therefore, typically, no vias are needed on the flexible substrate 102 to embed the fixing component 105. Of course, if vias are designed on the flexible substrate 102 for embedding the fixing component 105, the depth of the vias is typically less than or equal to half the thickness of the flexible substrate 102. For example, if the thickness of the flexible substrate 102 ranges from 10 μm to 20 μm, the depth of the vias designed on the flexible substrate 102 should be less than or equal to 5 μm to 10 μm.

[0145] Optionally, the height of the portion of the fixing component 105 protruding from the surface of the second flexible insulating layer 1062 away from the surface of the stretchable substrate 101 ranges from 1 μm to 2 μm. When the fixing component 105 includes a first type of fixing portion 1051 and a second type of fixing portion 1052, and each type of fixing portion 1051 and the second type of fixing portion 1052 includes a plurality of fixing structures 105a spaced apart, the width of the orthographic projection of the fixing structure 105a onto the flexible substrate 102 ranges from 5 μm to 20 μm, and the spacing between two adjacent fixing structures 105a ranges from 10 μm to 20 μm.

[0146] In this embodiment of the application, referring to Figures 21 and 22, the display panel 100 further includes a dummy trace 107 located on the same layer as the plurality of signal lines 104 and close to the edge of the flexible substrate 102 relative to the plurality of signal lines 104. The dummy trace 107 has a third via K3, and a portion of the fixing component 105 is also located within the third via K3. That is, the fixing component 105 passes through the second flexible insulating layer 1062 and the dummy trace 107 and is embedded inside the first flexible insulating layer 1061.

[0147] The phrase "dummy trace 107 and multiple signal lines 104 are located on the same layer" can mean that the dummy trace 107 and multiple signal lines 104 are fabricated using the same material and based on a single patterning process. Optionally, the fabrication process of the dummy trace 107 and multiple signal lines 104 includes: forming a conductive thin film, and patterning the conductive thin film using a mask to obtain the dummy trace 107 and multiple signal lines 104. The patterning process includes: photoresist coating, exposure, development, etching, and photoresist removal.

[0148] Without the dummy trace 107, the etchant concentration near the substrate edge is higher than that further away during the etching process. Therefore, the signal line 104 closest to the substrate edge among multiple signal lines 104 is prone to over-etching due to the excessive etchant concentration, which can easily lead to breakage. With the dummy trace 107, the etchant near the substrate edge preferentially etches the dummy trace 107 closer to the substrate edge, protecting the signal lines 104 and reducing the probability of breakage.

[0149] Optionally, the materials of the dummy trace 107 and the multiple signal lines 104 can be conductive materials, such as metal.

[0150] Optionally, the orthographic projection of the second via K2 on the stretchable substrate 101 lies within the orthographic projection of the dummy trace 107 on the stretchable substrate 101, and the area of ​​the orthographic projection of the second via K2 on the stretchable substrate 101 is smaller than the area of ​​the orthographic projection of the dummy trace 107 on the stretchable substrate 101. That is, the dummy trace 107 has a margin that extends beyond the second via K2.

[0151] The reason for reserving an edge portion in the dummy trace 107 is that if the dummy trace 107 does not have a reserved edge portion, when the second flexible insulating layer 1062 forms the second via K2 by etching, the dummy trace 107 is prone to peeling, resulting in irregular peeling and residue (such as curling to form a hollow space), which will affect the integrity of the subsequent filling of the fixing structure 105a.

[0152] Furthermore, the orthographic projection of the first via K1 on the stretchable substrate 101 lies within the orthographic projection of the dummy trace 107 on the stretchable substrate 101, and the area of ​​the orthographic projection of the first via K1 on the stretchable substrate 101 is smaller than the area of ​​the orthographic projection of the dummy trace 107 on the stretchable substrate 101. That is, the dummy trace 107 has an edge portion that extends beyond the first via K1, further improving the reliability of the dummy trace 107.

[0153] In this embodiment, assuming the dimension of the second via K2 near the stretchable substrate 101 is smaller than the dimension of the second via K2 away from the stretchable substrate 101, then in order for the dummy trace 107 to have a portion extending beyond the edge of the second via K2, the area of ​​the orthographic projection of the side of the second via K2 away from the stretchable substrate 101 onto the stretchable substrate 101 can be made smaller than the area of ​​the orthographic projection of the dummy trace 107 onto the stretchable substrate 101. Furthermore, assuming the dimension of the first via K1 near the stretchable substrate 101 is smaller than the dimension of the side of the first via K1 away from the stretchable substrate 101, then in order for the dummy trace 107 to have a portion extending beyond the edge of the first via K1, the area of ​​the orthographic projection of the side of the first via K1 away from the stretchable substrate 101 onto the stretchable substrate 101 can be made smaller than the area of ​​the orthographic projection of the dummy trace 107 onto the stretchable substrate 101.

[0154] In this embodiment, referring to FIG22, the cross-sectional shape of the portion of the fixing structure 105a protruding from the second flexible insulating layer 1062 can be a regular trapezoid. In this case, the dimension of the portion of the fixing structure 105a protruding from the second flexible insulating layer 1062 closer to the second flexible insulating layer 1062 is larger than the dimension of the portion farther from the second flexible insulating layer 1062. Alternatively, the cross-sectional shape of the portion of the fixing structure 105a protruding from the second flexible insulating layer 1062 can be rectangular or inverted trapezoidal; this embodiment does not limit this.

[0155] Furthermore, the orthographic projection of the fixing structure 105a onto the flexible substrate 102 can be circular or elliptical. Compared to a circle, an ellipse has a longer spatial proportion in the stretching direction. Additionally, the shorter minor axis of an ellipse saves space. The fixing structure 105a with an elliptical orthographic projection can be approximately an elliptical cylinder. When this fixing structure 105a deforms in the third direction Z, the stress in the third direction Z is more dispersed, reducing the force on the third direction Z and preventing premature failure of the signal line 104. The third direction Z is perpendicular to the bearing surface of the flexible substrate 102.

[0156] For the fixed structure 105a whose orthographic projection is elliptical, the length of the minor axis of the ellipse is relatively small, and the length of the second via K2 in the direction of the minor axis of the ellipse is also relatively small. This allows for more edge area to be reserved in the direction of the minor axis for the dummy trace 107, thus ensuring the reliability of the dummy trace 107.

[0157] In this embodiment, the line width of the dummy trace 107 can be 1 to 2 times the line width of the target signal line among the multiple signal lines 104. The target signal line is the signal line 104 with the largest line width among the multiple signal lines 104. That is, the line width of the dummy trace 107 can be relatively wide, which facilitates the design of a third via K3 on the dummy trace 107 for the mounting component 105, and also ensures the reliability of the dummy trace 107.

[0158] Optionally, referring to Figure 23, the multiple signal lines 104 included in the display panel 100 can be: gate signal line, reset signal line, reference signal line, reset power line, light emission control signal line, positive power line, negative power line, and data line.

[0159] For example, assuming that the positive power line (VDD) has the largest line width among the signal lines 104 above, then the positive power line is the target signal line. The line width of the dummy trace 107 can be 1 to 2 times the line width of the positive power line (VDD).

[0160] In this embodiment, the gate signal line, reset signal line, reference signal line (Vref), reset power supply line (Vinit), and light emission control signal line (EM) can be connected to the pixel units 1031 in the plurality of island-shaped display areas 101a arranged along the first direction X, and provide signals to the pixel units 1031 in the plurality of island-shaped display areas 101a arranged along the first direction X. The positive power supply line (VDD), negative power supply line (VSS), and data line (Data) can be connected to the pixel units 1031 in the plurality of island-shaped display areas 101a arranged along the second direction Y, and provide signals to the pixel units 1031 in the plurality of island-shaped display areas 101a arranged along the second direction Y.

[0161] Optionally, referring to Figure 23, the pixel unit layer 103 located in each island-shaped display area 101a includes three pixel units 1031. The three pixel units 1031 can be a red pixel unit 1031, a green pixel unit 1031, and a blue pixel unit 1031, respectively. Furthermore, the three pixel units 1031 need to be connected to three signal lines 104, such as the red pixel unit connected to the data line (Data_R), the green pixel unit connected to the data line (Data_G), and the blue pixel unit connected to the data line (Data_B).

[0162] In this embodiment, a signal line 104 is provided in a plurality of stretched regions 101b for connecting a plurality of island-shaped display regions 101a arranged in the first direction X to provide signals to the pixel units 1031 in the plurality of island-shaped display regions 101a arranged in the first direction X. That is, the plurality of stretched regions 101b in the first direction X include a gate signal line, a reset signal line, a reference signal line (Vref), a reset power supply line (Vinit), and an luminous emission control signal line (EM).

[0163] Referring to Figure 23, among the five signal lines 104, the gate signal line and the light emission control signal line (EM) can have wider linewidths, while the reset signal line, the reference signal line (Vref), and the reset power supply line (Vinit) can have narrower linewidths. Furthermore, the gate signal line and the light emission control signal line (EM) are closer to the edge of the flexible substrate 102 than the reset signal line, the reference signal line (Vref), and the reset power supply line (Vinit). Placing the wider signal lines 104 near the edge allows them to better withstand edge tensile stress, preventing breakage. Placing the narrower signal lines 104 away from the edge reduces the impact of edge tensile stress on the narrower signal lines 104, also preventing breakage.

[0164] Optionally, in the stretching region 101b in the first direction X, the dummy trace 107 can be located on the side of the gate signal line away from other signal lines 104, or on the side of the light emission control signal line away from other signal lines 104.

[0165] In this embodiment, a signal line 104 is provided in a plurality of stretched regions 101b for connecting a plurality of island-shaped display regions 101a arranged in the second direction Y to provide signals to the pixel units 1031 in the plurality of island-shaped display regions 101a arranged in the second direction Y. That is, the plurality of stretched regions 101b in the second direction Y include a positive power line (VDD), a negative power line (VSS), a data line (Data_R), a data line (Data_G), and a data line (Data_B).

[0166] Referring to Figure 23, among the five signal lines 104, the positive power line (VDD) and negative power line (VSS) can have wider linewidths, while the data lines (Data_R, Data_G, and Data_B) can have narrower linewidths. Furthermore, the positive power line (VDD) and negative power line (VSS) are positioned closer to the edge of the flexible substrate 102 than the individual data lines. Placing the wider signal lines 104 near the edge allows them to better withstand edge tensile stress, preventing breakage. Conversely, placing the narrower signal lines 104 away from the edge reduces the impact of edge tensile stress on the narrower signal lines, also preventing breakage.

[0167] Optionally, in the stretching region 101b in the second direction Y, the dummy trace 107 can be located on the side of the positive power line (VDD) away from other signal lines 104, or it can be located on the side of the negative power line (VSS) away from other signal lines 104.

[0168] In this embodiment, the pixel 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, i.e., a 7T1C pixel circuit. Alternatively, the pixel circuit may include other numbers of thin-film transistors and other numbers of storage capacitors. This embodiment does not limit the number of thin-film transistors or the number of storage capacitors included in the pixel circuit.

[0169] Each thin-film transistor includes a gate, a source, and a drain. Multiple thin-film transistors in a pixel circuit are interconnected to drive the light-emitting unit to emit light.

[0170] Referring to Figure 21, the dummy trace 107 can be located in the corner region G. Referring to Figures 24 to 27, the dummy trace 107 can also be located in the connection region 101b.

[0171] Figure 28 is a cross-sectional view of Figure 23 along the DD' direction. Referring to Figure 28, the pixel unit layer 103 includes: a barrier layer n1, a buffer layer n2, an active layer n3, a first gate insulator (GI1) n4, a first gate layer (Gate1) n5, a second gate insulator (GI2) n6, a second gate layer (Gate2) n7, an inter-level dielectric (ILD) layer n8, a source-drain layer n9, a second planarization layer (PLN2) n10, an anode layer n11, a pixel definition layer (PDL) n12, a light-emitting layer (not shown in Figure 24), and a cathode layer (not shown in Figure 24). The barrier layer n1, buffer layer n2, active layer n3, first gate insulating layer n4, first gate layer n5, second gate insulating layer n6, second gate layer n7, interlayer dielectric layer n8, source-drain layer n9, and second planarization layer n10 are used to form the pixel circuit of pixel unit 1031. The anode layer n11, pixel defining layer n12, light-emitting layer (which can also be called EL functional layer), and cathode layer are used to form the light-emitting unit of pixel unit 1031.

[0172] The active layer n3 includes multiple active patterns corresponding to multiple thin-film transistors. Each active pattern includes a source region, a drain region, and a channel region. The source and drain of the thin-film transistors are located in the source-drain layer n9, and the source and source regions of the thin-film transistors are connected, and the drain and drain regions are connected.

[0173] The first gate layer n5 includes multiple gate patterns corresponding to multiple thin-film transistors. The channel region is the overlapping area of ​​the orthographic projection of the gate pattern on the flexible substrate 102 and the orthographic projection of the active pattern on the flexible substrate 102.

[0174] In this embodiment, multiple signal lines 104 are located in the source-drain layer n9, and the second flexible insulating layer 1062 and the second planarization layer n10 are located in the same layer. The first flexible insulating layer 1061 can be the first planarization layer (PLN1) n13. The second flexible insulating layer 1062 and the second planarization layer n10 being in the same layer can mean that the second flexible insulating layer 1062 and the second planarization layer n10 are made of the same material and fabricated using a single patterning process.

[0175] Furthermore, the first flexible insulating layer 1061 (first planarization layer n13) is prepared prior to the source / drain layer n9. To enable the stretching region 101b to be stretched, the inorganic material film layer in the stretching region 101b needs to be removed. This results in a significant step difference between the surface of the island display region 101a used to form the source / drain layer n9 and the surface of the stretching region 101b used to form the source / drain layer n9 during the formation of the source / drain layer n9, which may affect the wiring of the signal line 104. Therefore, to reduce the surface step difference between the two regions, an organic material layer (first flexible insulating layer 1061) can be separately provided in the stretching region 101b to fill the voids left after the removal of the inorganic material film layer, so that the surface of the island display region 101a used to form the source / drain layer n9 and the surface of the stretching region 101b used to form the source / drain layer n9 are approximately on the same plane, reducing the wiring difficulty of the signal line 104.

[0176] Optionally, the distance between the surface of the first flexible insulating layer 1061 away from the flexible substrate 102 and the surface of the interlayer dielectric layer n8 away from the flexible substrate 102 in the third direction Z is less than a distance threshold. That is, the surfaces in the island display region 101a used to form the source-drain layer n9 and the surfaces in the stretching region 101b used to form the source-drain layer n9 are approximately on the same plane.

[0177] In this embodiment, the fixing component 105 may be located in the same layer as the pixel defining layer n12. Optionally, when the fixing component 105 includes a first type of fixing part 1051 and a second type of fixing part 1052, and each type of fixing part 1051 and the second type of fixing part 1052 includes a plurality of spaced fixing structures 105a, the fixing structures 105a and the pixel defining layer n12 are located in the same layer. Being located in the same layer can mean using the same material and being fabricated using a single patterning process.

[0178] In this embodiment, the gate signal line (Gate), reset signal line (reset), reference signal line (Vref), reset power supply line (Vinit), and light emission control signal line (EM) can be located in the second gate layer n7. The data lines (Data_R), (Data_G), and (Data_B) can be located in the source-drain layer n9. A portion of the positive power supply line (VDD) and negative power supply line (VSS) are located in the source-drain layer n9, while the other portion is routed through the first gate layer n5 to avoid design conflicts with the various signal lines. For example, in Figure 23, the first portion a1 of the positive power supply line (VDD) is located in the source-drain layer n9, and the second portion a2 of the positive power supply line (VDD) is located in the first gate layer n5. The first portion b1 of the negative power supply line (VSS) is located in the source-drain layer n9, and the second portion b2 of the negative power supply line (VSS) is located in the first gate layer n5.

[0179] In this embodiment, the fabrication process of the display panel includes: 1. Coating a flexible material (such as polyimide) onto a rigid substrate (such as a glass substrate) and curing the flexible material to form a film to obtain a flexible substrate 102 film; 2. Determining the cutout region 101d to be formed and removing the flexible material in the cutout region 101d by inductively coupled plasma (ICP) etching to obtain the flexible substrate 102; 3. Sequentially forming a barrier film, a buffer film, an active film, a first gate insulating film, a first gate film, a second gate insulating film, a second gate film, and an interlayer dielectric film on the flexible substrate 102. 1. The pixel circuit of pixel unit 1031 has been formed at this stage; 2. The stretching region 101b, the connection region 101c and the hollow region 101d to be formed are determined, and the blocking film, buffer film, active film, first gate insulating film, first gate film, second gate insulating film, second gate film and interlayer dielectric film in the stretching region 101b and the connection region 101c are removed; 3. A first flexible insulating layer 1061 (first planarization layer n13) is formed on one side of the flexible substrate 102 in the stretching region 101b and the connection region 101c. The first via K1 included in the first flexible insulating layer 1061 is also etched and formed at this stage; 4. Multiple signal lines 1 are formed in the island display region 101a, the stretching region 101b and the connection region 101c. 04 and dummy trace 107, the third via K3 included in dummy trace 107 is also etched and formed in this stage; 6. Form the second flexible insulating layer 1062 (second planarization layer n10), the second via K2 included in the second flexible insulating layer 1062 is also etched and formed in this stage; 7. Form the anode layer n11, pixel defining layer n12, light emitting layer and cathode layer, the pixel defining layer n12 can be prepared simultaneously with the fixing component 105, so that the fixing component 105 fills the second via K2, the third via K3 and the first via K1; 8. After the pixel unit layer 103 is prepared, the rigid carrier is peeled off, and the stretchable substrate 101 is pasted on the flexible substrate 102 away from the pixel unit layer 103 using adhesive (OCA adhesive) 108, thereby obtaining the display panel.

[0180] It should be noted that step 2 can be performed after step 7. In step 4, when forming the first flexible insulating layer 1061, the first via K1 can be formed without etching first. The first via K1 can be etched simultaneously with the second via K2 in step 7. That is, the first via K1 and the second via K2 can be implemented using two separate etching processes, or they can be implemented using the same etching process. This application embodiment does not limit this.

[0181] In this embodiment, the display panel 100 further includes an encapsulation film layer (not shown in the figure). The encapsulation film layer is located in the island-shaped display area 101a, the stretching area 101b, and the connecting area 101c. The encapsulation film layer is used to encapsulate the pixel unit layer 103, multiple signal lines 104, and the fixing component 105.

[0182] Optionally, the encapsulation film may comprise a single-layer inorganic material film, such as at least one of SiNx (silicon nitride), SiCN (silicon carbon nitride), SiOx (silicon oxide), SiOxNy (silicon oxynitride), and Al2O3 (aluminum oxide). This encapsulation film can be prepared using methods such as chemical vapor deposition (CVD), physical vapor deposition (PVD), and atomic layer deposition (ALD). The thickness of the encapsulation film ranges from 0.05 μm to 2 μm.

[0183] Alternatively, the encapsulation film can be a film composed of three stacked layers: an inorganic material film, an organic material film, and an inorganic material film. For example, the encapsulation film may include a first film, a second film, and a third film stacked in a direction away from the flexible substrate 102. The first and third films may be made of inorganic materials, and the second film may be made of organic materials.

[0184] For example, the first and third film layers can be made of one or more inorganic oxides such as SiNx, SiOx, and SiOxNy. The second film layer can be made of a resin material. The resin can be a thermoplastic resin or a thermosetting resin, where the thermoplastic resin can include acrylic (PMMA) resin and the thermosetting resin can include epoxy resin.

[0185] Optionally, the second film layer can be fabricated using inkjet printing (IJP). The first and third film layers can be fabricated using chemical vapor deposition (CVD).

[0186] In summary, this application provides a display panel including a stretchable substrate, a flexible substrate, a pixel unit layer, multiple signal lines, and a fixing component. The fixing component is located at least in the connection area of ​​the stretchable substrate and is closer to the edge of the flexible substrate than the multiple signal lines. When the display panel is stretched, the presence of the fixing component can alleviate the tensile stress on the film layer at the edge of the connection area, preventing the tensile stress from concentrating at the edge of the connection area. This avoids breakage of the signal lines near the edge of the connection area, improves the reliability of signal transmission driving signals, and thus improves the yield of the display panel.

[0187] Figure 29 is a schematic diagram of a display device provided in an embodiment of this application. Referring to Figure 29, the display device includes a power supply component 200 and a display panel 100 as provided in the above embodiment. The power supply component 200 is connected to the display panel 100 and is used to supply power to the display panel 100.

[0188] Optionally, the display panel can be an organic light emitting diode (OLED) display panel, and the display device can be an OLED display device. Optionally, the display device can be any suitable display device, including but not limited to mobile phones, tablets, televisions, monitors, laptops, digital photo frames, navigators, and e-readers, as well as any product or component with display functionality.

[0189] Since the display device can have essentially the same technical effects as the display panel described in the previous embodiments, for the sake of brevity, the technical effects of the display device will not be described again here.

[0190] The terminology used in the embodiments section of this application is for explaining the embodiments of this application only and is not intended to limit this application. Unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains.

[0191] The terminology used in the embodiments section of this application is for illustrative purposes only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in the patent application specification and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0192] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized by, The display panel comprises: a stretchable substrate comprising an island display region, a stretchable region, a connecting region connecting the island display region and the stretchable region, and a hollow region between the island display region and the stretchable region; a flexible substrate comprising a first substrate portion, a connecting substrate portion, and a second substrate portion connected in sequence, the first substrate portion being located at the island display region, the connecting substrate portion being located at the connecting region, and the second substrate portion being located at the stretchable region; a pixel unit layer comprising at least a pixel unit, the pixel unit layer being located at one side of the first substrate portion of the island display region; a plurality of signal lines, each of the signal lines being located at the island display region, the stretchable region, and the connecting region, the signal line at the island display region being connected with the pixel unit, the signal line at the connecting region being used for transmitting a driving signal provided by a driving circuit, and the signal line at the stretchable region being used for transmitting the driving signal provided by the driving circuit; and a fixing assembly located at least at the connecting region and closer to the edge of the flexible substrate relative to the plurality of signal lines; wherein the distance between the fixing assembly close to one side of the stretchable substrate and the stretchable substrate is smaller than the distance between the plurality of signal lines close to one side of the stretchable substrate and the stretchable substrate, and the distance between the fixing assembly away from one side of the stretchable substrate and the stretchable substrate is greater than the distance between the plurality of signal lines away from one side of the stretchable substrate and the stretchable substrate.

2. The display panel of claim 1, wherein, The connecting substrate portion has opposite first and second substrate edges, and the fixing assembly comprises first and second types of fixing portions. The orthographic projections of the first and second types of fixing portions on the stretchable substrate are located on two sides of the orthographic projections of the plurality of signal lines on the stretchable substrate. The first type of fixing portion is closer to the first substrate edge relative to the plurality of signal lines, and the second type of fixing portion is closer to the second substrate edge relative to the plurality of signal lines.

3. The display panel of claim 2, wherein, Each of the first and second types of fixing portions comprises a plurality of fixing structures arranged at intervals, the plurality of fixing structures of the first type of fixing portion being arranged along the extension direction of the signal line close to the first substrate edge, and the plurality of fixing structures of the second type of fixing portion being arranged along the extension direction of the signal line close to the second substrate edge. The distance between each of the fixing structures close to one side of the stretchable substrate and the stretchable substrate is smaller than the distance between the plurality of signal lines close to one side of the stretchable substrate and the stretchable substrate, and the distance between each of the fixing structures away from one side of the stretchable substrate and the stretchable substrate is greater than the distance between the plurality of signal lines away from one side of the stretchable substrate and the stretchable substrate.

4. The display panel of claim 3, wherein, The radius of curvature of the first substrate edge is smaller than the radius of curvature of the second substrate edge. The first type of fixing part in the fixing assembly at the connection region includes a smaller number of fixing structures than the second type of fixing part in the fixing assembly at the connection region.

5. The display panel of claim 3, wherein, The stretchable substrate includes a plurality of island display regions arranged in an array, and a plurality of stretch regions for connecting the plurality of island display regions; the stretch region includes at least a first sub-stretch region and a second sub-stretch region, a tangent line of a first sub-stretch edge of the first sub-stretch region and a tangent line of a second sub-stretch edge of the second sub-stretch region intersect, and the stretch region includes a corner region including an area where the tangent line of the first sub-stretch edge and the tangent line of the second sub-stretch edge intersect; The plurality of island display regions includes a first island display region and a second island display region adjacent to each other, and the plurality of stretch regions includes a first stretch region between the first island display region and the second island display region, one end of the first stretch region being connected to the first island display region through a connection region, and the other end being connected to the second island display region through another connection region; The fixing assembly is also located at the corner region, and the fixing assembly is closer to the edge of the flexible substrate relative to the plurality of signal lines.

6. The display panel of claim 5, wherein, The second substrate portion has opposite third and fourth substrate edges, the third substrate edge and the first substrate edge being continuous edges, and the fourth substrate edge and the second substrate edge being continuous edges; The radius of curvature of the portion of the third substrate edge at the corner region is greater than the radius of curvature of the portion of the fourth substrate edge at the corner region; The first type of fixing part in the fixing assembly at the corner region includes a greater number of fixing structures than the second type of fixing part in the fixing assembly at the corner region.

7. The display panel of claim 6, wherein, The arrangement span of the plurality of fixing structures included in the first type of fixing part in the fixing assembly at the corner region is greater than or equal to the diameter of curvature of the portion of the third substrate edge at the corner region; The arrangement span of the plurality of fixing structures included in the second type of fixing part in the fixing assembly at the corner region is greater than or equal to the diameter of curvature of the portion of the fourth substrate edge at the corner region.

8. The display panel of claim 5, wherein, The plurality of island display regions further includes a third island display region adjacent to the second island display region and located away from the first island display region, and the plurality of stretch regions further includes a second stretch region between the second island display region and the third island display region; Each of the first, second, and third island display regions includes a first side edge, a second side edge, a third side edge, and a fourth side edge connected in sequence, the first side edge and the third side edge being arranged along a first direction, and the second side edge and the fourth side edge being arranged along a second direction intersecting the first direction. The first island-shaped display region, the second island-shaped display region and the third island-shaped display region are arranged along the first direction; one end of the first stretchable region is connected to a portion of the third side of the first island-shaped display region close to the second side, and the other end is connected to a portion of the first side of the second island-shaped display region close to the second side; one end of the second stretchable region is connected to a portion of the third side of the second island-shaped display region close to the fourth side, and the other end is connected to a portion of the first side of the third island-shaped display region close to the fourth side. Alternatively, the first island-shaped display region, the second island-shaped display region and the third island-shaped display region are arranged along the second direction; one end of the first stretchable region is connected to a portion of the fourth side of the first island-shaped display region close to the third side, and the other end is connected to a portion of the second side of the second island-shaped display region close to the third side; one end of the second stretchable region is connected to a portion of the fourth side close to the first side, and the other end is connected to a portion of the second side close to the first side.

9. The display area of claim 5, wherein, Each of the first island-shaped display region and the second island-shaped display region comprises a first side, a second side, a third side and a fourth side connected in sequence, the first side and the third side are arranged along the first direction, the second side and the fourth side are arranged along the second direction, and the second direction intersects the first direction. The first stretchable region and the second stretchable region are arranged along the first direction; one end of the first stretchable region is connected to a portion of the fourth side of the first island-shaped display region close to the third side, and the other end is connected to a portion of the second side of the second island-shaped display region close to the first side. Alternatively, the first stretchable region and the second stretchable region are arranged along the second direction; one end of the first stretchable region is connected to a portion of the first side of the first island-shaped display region close to the fourth side, and the other end is connected to a portion of the third side of the second island-shaped display region close to the second side.

10. The display panel of claim 3, wherein, The shape of the orthographic projection of the fixing structure on the flexible substrate is a circle or an ellipse.

11. The display panel of any of claims 1 to 10, wherein, The display panel comprises a flexible film layer group on one side of the connecting substrate part and the second substrate part; the flexible film layer group comprises at least a first flexible insulating layer and a second flexible insulating layer, and the plurality of signal lines are located between the first flexible insulating layer and the second flexible insulating layer; The first flexible insulating layer has a first via hole, the second flexible insulating layer has a second via hole in communication with the first via hole, a part of the fixing assembly is located in the first via hole and the second via hole, and another part of the fixing assembly protrudes from the surface of the second flexible insulating layer away from the stretchable substrate; The second via hole penetrates through the second flexible insulating layer, and the depth of the first via hole is less than or equal to the thickness of the first flexible insulating layer.

12. The display panel of claim 11, wherein, In a case that the depth of the first via is equal to the thickness of the first flexible insulating layer, the first via is configured to expose a target region of the second substrate portion, and the fixing assembly is in contact with the target region and a side of the stretchable substrate close to the target region.

13. The display panel of claim 11, wherein, The display panel further comprises a dummy trace in the same layer as the plurality of signal lines and close to the edge of the flexible substrate relative to the plurality of signal lines; A projection of the second via on the stretchable substrate is located within a projection of the dummy trace on the stretchable substrate, and an area of the projection of the second via on the stretchable substrate is less than an area of the projection of the dummy trace on the stretchable substrate; A projection of the first via on the stretchable substrate is located within a projection of the dummy trace on the stretchable substrate, and an area of the projection of the first via on the stretchable substrate is less than an area of the projection of the dummy trace on the stretchable substrate; The dummy trace has a third via, and a part of the fixing assembly is also located in the third via.

14. The display panel of claim 13, wherein, A dimension of a side of the second via close to the stretchable substrate is less than a dimension of a side of the second via away from the stretchable substrate; An area of a projection of the side of the second via away from the stretchable substrate on the stretchable substrate is less than an area of a projection of the dummy trace on the stretchable substrate; A dimension of a side of the first via close to the stretchable substrate is less than a dimension of a side of the first via away from the stretchable substrate; An area of a projection of the side of the first via away from the stretchable substrate on the stretchable substrate is less than an area of a projection of the dummy trace on the stretchable substrate.

15. The display panel of claim 13, wherein, A line width of the dummy trace is 1 to 2 times a line width of a target signal line in the plurality of signal lines; The target signal line is a signal line with the largest line width in the plurality of signal lines.

16. The display panel of claim 11, wherein, A height of the fixing assembly protruding from a part of the second flexible insulating layer away from a surface of the stretchable substrate ranges from 1 to 2 microns; In a case that the fixing assembly comprises a first type of fixing part and a second type of fixing part, each type of fixing part comprises a plurality of fixing structures arranged at intervals, a width of a projection of the fixing structure on the flexible substrate ranges from 5 to 20 microns, and a distance between adjacent two fixing structures ranges from 10 to 20 microns.

17. The display panel of claim 11, wherein, The pixel unit layer comprises a barrier layer, a buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a source-drain layer, a second planarization layer, an anode layer, a pixel definition layer, a light-emitting layer, and a cathode layer. The active layer comprises an active pattern, and the active pattern comprises a source region, a drain region, and a channel region. The source-drain layer comprises a source and a drain, the source is connected with the source region through fourth via holes in the interlayer dielectric layer, the second gate insulating layer and the first gate insulating layer, and the drain is connected with the drain region through fifth via holes in the interlayer dielectric layer, the second gate insulating layer and the first gate insulating layer; The first gate layer comprises a first gate pattern, and the channel region is an overlapping area of a normal projection of the first gate pattern on the flexible substrate and a normal projection of the active pattern on the flexible substrate.

18. The display panel of claim 17, wherein, The plurality of signal lines are located in the source-drain layer, the second flexible insulating layer and the second planar layer are located in the same layer, and the first flexible insulating layer is a first planar layer. The distance between the surface of the first flexible insulating layer away from the flexible substrate and the surface of the interlayer dielectric layer away from the flexible substrate in a third direction is less than a distance threshold, and the third direction is a direction perpendicular to the bearing surface of the flexible substrate.

19. The display panel of claim 15, wherein, The fixing component and the pixel boundary layer are located in the same layer.

20. The display panel of any one of claims 1 to 10, wherein, The display panel further comprises an encapsulation film layer. The encapsulation film layer is located in the island-shaped display region, the stretching region and the connection region, and is used for encapsulating the pixel unit layer, the plurality of signal lines and the fixing component.

21. A display device comprising: The display device comprises a power supply component and the display panel as claimed in any one of claims 1 to 20. The power supply component is connected with the display panel, and is used for supplying power to the display panel.

Images