Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The problem that in the prior art, a display panel is low in stretch rate is solved. The display panel comprises a substrate, the substrate comprises a plurality of island parts, the island parts form a plurality of island groups, each island group comprises a first island part, a second island part, a third island part and a fourth island part which are arranged in a quadrangle shape, the first island part is provided with a first position and a third position, and the second island part is provided with a second position and a fourth position; a plurality of sub-pixels respectively located on the corresponding island portions; the plurality of pixel circuits are respectively positioned on the corresponding island parts and are used for driving the corresponding sub-pixels; and a plurality of bridging lines including a first bridging line and a second bridging line between the first island portion and the second island portion. The shape of the first bridging line and the shape of the second bridging line facilitate stretching and contracting of the display panel, and when the display panel is stretched, a large stretching rate can be achieved under the small deformation angles of the first bridging line and the second bridging line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device. BACKGROUND

[0002] In recent years, flexible electronic devices gradually come into people's vision. Among them, flexible display panels such as stretchable light-emitting devices have wide application prospects in the fields of display and lighting as an important member of flexible electronic devices. In particular, with the rise of wearable electronic devices, stretchable light-emitting devices have attracted much attention due to their great application potential in this emerging field. However, the flexible substrate of the current stretchable light-emitting device has the problem of low stretchability. SUMMARY

[0003] Therefore, the embodiments of the present application provide a display panel, which solves the problem of low stretchability of the display panel in the prior art.

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

[0005] a substrate comprising a plurality of island portions, the plurality of island portions forming a plurality of island groups, an island group comprising a first island portion, a second island portion, a third island portion and a fourth island portion arranged in a quadrilateral shape, the first island portion and the second island portion being adjacent in a first direction, the third island portion and the fourth island portion being adjacent in the first direction, the first island portion having a first position and a third position, the second island portion having a second position and a fourth position;

[0006] a plurality of sub-pixels respectively located on corresponding island portions;

[0007] a plurality of pixel circuits respectively located on corresponding island portions and used for driving corresponding sub-pixels; and

[0008] a plurality of bridge lines comprising a first bridge line and a second bridge line located between the first island portion and the second island portion;

[0009] wherein two ends of the first bridge line are connected with a circuit structure of a pixel circuit at the first position and a circuit structure of a pixel circuit at the second position respectively, two ends of the second bridge line are connected with a circuit structure of a pixel circuit at the third position and a circuit structure of a pixel circuit at the fourth position respectively, a distance between a first midpoint of the first bridge line and a second midpoint of the second bridge line is less than a distance between the first position and the third position, and less than a distance between the second position and the fourth position;

[0010] the first bridge line comprises a plurality of inflection points, the plurality of inflection points comprising a first inflection point and a second inflection point, the first inflection point and the second inflection point being located on two sides of the first midpoint, a distance between the first inflection point and the first midpoint is greater than a distance between the first position and the first midpoint, and a distance between the second inflection point and the first midpoint is greater than a distance between the second position and the first midpoint.

[0011] In an embodiment, the second bridge line comprises a plurality of inflection points, the plurality of inflection points comprising a third inflection point and a fourth inflection point, the third inflection point and the fourth inflection point being located on two sides of the second midpoint, a distance between the third inflection point and the second midpoint being greater than a distance between the third position and the second midpoint, a distance between the fourth inflection point and the second midpoint being greater than a distance between the fourth position and the second midpoint;

[0012] Preferably, the first position and the third position are located on a side of the first island part close to the second island part, the second position and the fourth position are located on a side of the second island part close to the first island part; the first position and the second position are both located on a first side of a line connecting a centroid of the first island part and a centroid of the second island part, the third position and the fourth position are both located on a second side of the line opposite to the first side where the first position and the second position are located;

[0013] Preferably, in a length direction of the first bridge line from the first position to the second position, the first bridge line comprises a first segment, a second segment, a third segment and a fourth segment connected in sequence, the first segment extends from the first position to the first inflection point in a direction away from the second bridge line, the second segment extends from the first inflection point to the first midpoint in a direction close to the second bridge line, the third segment extends from the first midpoint to the second inflection point in a direction away from the second bridge line, the fourth segment extends from the second inflection point to the second position in a direction close to the second bridge line;

[0014] Preferably, in a length direction of the second bridge line from the third position to the fourth position, the second bridge line comprises a fifth segment, a sixth segment, a seventh segment and an eighth segment connected in sequence, the fifth segment extends from the third position to the third inflection point in a direction away from the first bridge line, the sixth segment extends from the third inflection point to the second midpoint in a direction close to the first bridge line, the seventh segment extends from the second midpoint to the fourth inflection point in a direction away from the first bridge line, the eighth segment extends from the fourth inflection point to the fourth position in a direction close to the first bridge line;

[0015] Preferably, the first bridge line and the second bridge line are both symmetrical with respect to a line connecting the first midpoint and the second midpoint.

[0016] In an embodiment, the third island part and the fourth island part are adjacent in a first direction, the first island part and the third island part are adjacent in a second direction, the second island part and the fourth island part are adjacent in the second direction, the first direction intersects the second direction;

[0017] Preferably, the third island part has a fifth position and a seventh position, the fourth island part has a sixth position and an eighth position;

[0018] The plurality of bridge lines further comprises a third bridge line and a fourth bridge line located between the third island part and the fourth island part;

[0019] The two ends of the third bridge line are connected with the circuit structure of the pixel circuit at the fifth position and the circuit structure of the pixel circuit at the sixth position respectively, and the two ends of the fourth bridge line are connected with the circuit structure of the pixel circuit at the seventh position and the circuit structure of the pixel circuit at the eighth position respectively; the fifth position and the seventh position are located on one side of the third island close to the fourth island, and the sixth position and the eighth position are located on one side of the fourth island close to the third island; the fifth position and the sixth position are both located on the third side of the centroid connecting line of the third island and the fourth island, and the third position and the fourth position are both located on the fourth side of the centroid connecting line opposite to the side where the fifth position and the sixth position are located;

[0020] Preferably, the bridge line located between the third island and the fourth island has the same structure as the bridge line located between the first island and the second island;

[0021] Preferably, the first bridge line and the second bridge line are both curved lines;

[0022] Preferably, the first island has a ninth position and an eleventh position, and the third island has a tenth position and a twelfth position;

[0023] The plurality of bridge lines further include a fifth bridge line and a sixth bridge line located between the first island and the third island;

[0024] The two ends of the fifth bridge line are connected with the circuit structure of the pixel circuit at the ninth position and the circuit structure of the pixel circuit at the tenth position respectively, and the two ends of the sixth bridge line are connected with the circuit structure of the pixel circuit at the eleventh position and the circuit structure of the pixel circuit at the twelfth position respectively; the ninth position and the eleventh position are located on one side of the first island close to the third island, and the tenth position and the twelfth position are located on one side of the third island close to the first island; the ninth position and the tenth position are both located on the fifth side of the centroid connecting line of the first island and the third island, and the eleventh position and the twelfth position are both located on the sixth side of the centroid connecting line opposite to the side where the ninth position and the tenth position are located;

[0025] Preferably, the distance between the third midpoint of the fifth bridge line and the fourth midpoint of the sixth bridge line is smaller than the distance between the ninth position and the eleventh position, and smaller than the distance between the tenth position and the twelfth position;

[0026] Preferably, the fifth bridge line includes a plurality of inflection points, and the plurality of inflection points include a fifth inflection point and a sixth inflection point, the fifth inflection point and the sixth inflection point are located on both sides of the third midpoint, the distance between the fifth inflection point and the third midpoint is greater than the distance between the ninth position and the third midpoint, and the distance between the sixth inflection point and the third midpoint is greater than the distance between the tenth position and the third midpoint;

[0027] Preferably, the sixth bridge line comprises a plurality of inflection points, the plurality of inflection points comprising a seventh inflection point and an eighth inflection point, the seventh inflection point and the eighth inflection point being located on two sides of the fourth midpoint, a distance between the seventh inflection point and the fourth midpoint being greater than a distance between the eleventh position and the fourth midpoint, a distance between the eighth inflection point and the fourth midpoint being greater than a distance between the twelfth position and the fourth midpoint;

[0028] Preferably, in a length direction of the fifth bridge line from the ninth position to the tenth position, the fifth bridge line comprises a ninth segment, a tenth segment, an eleventh segment and a twelfth segment connected in sequence, the ninth segment extending from the ninth position to the fifth inflection point in a direction away from the sixth bridge line, the tenth segment extending from the fifth inflection point to the third midpoint in a direction close to the sixth bridge line, the eleventh segment extending from the third midpoint to the sixth inflection point in a direction away from the sixth bridge line, and the twelfth segment extending from the sixth inflection point to the tenth position in a direction close to the sixth bridge line;

[0029] Preferably, in a length direction of the sixth bridge line from the eleventh position to the twelfth position, the sixth bridge line comprises a thirteenth segment, a fourteenth segment, a fifteenth segment and a sixteenth segment connected in sequence, the thirteenth segment extending from the eleventh position to the seventh inflection point in a direction away from the fifth bridge line, the fourteenth segment extending from the seventh inflection point to the fourth midpoint in a direction close to the fifth bridge line, the fifteenth segment extending from the fourth midpoint to the eighth inflection point in a direction away from the fifth bridge line, and the sixteenth segment extending from the eighth inflection point to the twelfth position in a direction close to the fifth bridge line;

[0030] Preferably, the fifth bridge line and the sixth bridge line are symmetrical with respect to a line connecting the third midpoint and the fourth midpoint;

[0031] Preferably, the fifth bridge line and the sixth bridge line are curves;

[0032] Preferably, the second island portion has a thirteenth position and a fifteenth position, and the fourth island portion has a fourteenth position and a sixteenth position;

[0033] The plurality of bridge lines further comprises a seventh bridge line and an eighth bridge line between the second island portion and the fourth island portion;

[0034] Two ends of the seventh bridge line are connected with the circuit structure of the pixel circuit at the thirteenth position and the circuit structure of the pixel circuit at the fourteenth position respectively, and two ends of the eighth bridge line are connected with the circuit structure of the pixel circuit at the fifteenth position and the circuit structure of the pixel circuit at the sixteenth position respectively; the thirteenth position and the fifteenth position are located on a side of the second island portion close to the fourth island portion, and the fourteenth position and the sixteenth position are located on a side of the fourth island portion close to the second island portion; the thirteenth position and the fourteenth position are located on a seventh side of a line connecting the centers of the second island portion and the fourth island portion, and the fifteenth position and the sixteenth position are located on an eighth side of the line opposite to the seventh side where the thirteenth position and the fourteenth position are located;

[0035] Preferably, the bridging line between the first island and the third island has the same structure as the bridging line between the second island and the fourth island.

[0036] In one embodiment, multiple islands are arranged along a first direction and a second direction, respectively, with the first direction intersecting the second direction;

[0037] The first island, the second island, the third island, and the fourth island are connected by four bridge lines, and the figure formed by the four bridge lines is centrally symmetrical.

[0038] Preferably, the figure formed by the four bridge lines between the first island, the second island, the third island, and the fourth island is axially symmetrical;

[0039] Preferably, the inflection points on both sides of the centroid connecting the first island and the fourth island are close to each other and extend towards the center of symmetry of the figure enclosed by the four bridge lines, and / or, the inflection points on both sides of the centroid connecting the second island and the third island are close to each other and extend towards the center of symmetry of the figure enclosed by the four bridge lines.

[0040] Preferably, the angle between the line connecting the inflection point of the bridge wire connected to the pixel circuit of the first island and the center of symmetry and the line connecting the centroids of the first island and the fourth island is 20-25°, preferably 22.5°; and / or, the angle between the line connecting the inflection point of the bridge wire connected to the pixel circuit of the fourth island and the center of symmetry and the line connecting the centroids of the first island and the fourth island is 20-25°, preferably 22.5°; and / or, the angle between the line connecting the inflection point of the bridge wire connected to the pixel circuit of the second island and the center of symmetry and the line connecting the centroids of the second island and the third island is 20-25°, preferably 22.5°; and / or, the angle between the line connecting the inflection point of the bridge wire connected to the pixel circuit of the third island and the line connecting the centroids of the second island and the third island is 20-25°, preferably 22.5°.

[0041] In one embodiment, the substrate further includes: a plurality of bridge portions, the bridge portions connecting adjacent island portions, bridge lines located on the bridge portions, and the bridge portions and bridge lines extending in the same direction;

[0042] Preferably, a sub-pixel is located in an island portion, and the first bridge connection and the second bridge connection are respectively located in a bridge portion;

[0043] Preferably, the plurality of bridge portions include a first bridge portion and a second bridge portion, the first bridge portion includes a first groove and a first bridge wire is located in the first groove, and the second bridge portion includes a second groove and a second bridge wire is located in the second groove;

[0044] Preferably, the first bridge portion and the second bridge portion corresponding to the first midpoint and the second midpoint are connected as one unit;

[0045] Preferably, the substrate includes a flexible substrate.

[0046] In one embodiment, the island includes a central region and an edge region surrounding the central region, with sub-pixels located in the central region and the thickness of the edge region gradually decreasing in a direction gradually moving away from the central region;

[0047] Preferably, the longitudinal section of the edge region has an arc shape on the side closest to the sub-pixel;

[0048] Preferably, the display panel further includes: a plurality of bridge sections, the bridge sections connecting adjacent island sections, bridge lines located on the bridge sections, and the extension directions of the bridge sections and bridge lines being consistent; the bridge section includes a connecting area and a main body area, the connecting area connecting to the island section, and the thickness of the connecting area gradually decreasing in the direction from the main body area to the connecting area;

[0049] Preferably, the longitudinal section of the connection area is arc-shaped on the side closest to the bridge wire.

[0050] In one embodiment, the island has multiple recessed edges, with the first, second, third, and fourth positions located at the edges of a recess;

[0051] Preferably, the island portion includes a central region and an edge region surrounding the central region, with the recessed edge located in the edge region;

[0052] Preferably, the edge region extending from the recessed edge toward the central region includes a first notch or a first opening;

[0053] Preferably, the first notch and / or the first opening extends through the edge region along the thickness direction of the substrate.

[0054] In one embodiment, the bridge portion includes a plurality of turning sub-ports, and the turning sub-ports include a second notch or a second opening;

[0055] Preferably, the second notch and / or the second opening penetrates the turning section along the thickness direction of the bridge portion;

[0056] Preferably, the first bridge connection includes a first inflection point and a second inflection point, and the first inflection point, the second inflection point and the first midpoint are respectively located at a turning sub-section;

[0057] Preferably, the second bridge connection includes a third inflection point and a fourth inflection point, and the third inflection point, the fourth inflection point, and the second midpoint are each located at a turning sub-section.

[0058] A second aspect of this application provides a display panel, comprising:

[0059] The substrate includes multiple islands, each island comprising a central region and an edge region surrounding the central region; the thickness of the edge region gradually decreases in a direction gradually moving away from the central region.

[0060] Multiple sub-pixels are located on their respective islands, with the sub-pixels located in the central region;

[0061] Multiple pixel circuits, each located on a corresponding island, are used to drive the corresponding sub-pixels; and

[0062] Multiple bridging lines are located between adjacent islands, and the two ends of the bridging lines are respectively connected to the circuit structure of the pixel circuit of the two adjacent islands.

[0063] In one embodiment, the island portion has multiple recessed edges, the recessed edges are located in the edge region, and the edge region extending from the recessed edges toward the central region includes a first notch or a first opening.

[0064] Preferably, the first notch and / or the first opening extends through the edge region along the thickness direction of the substrate.

[0065] A third aspect of this application provides a method for manufacturing a display panel, comprising:

[0066] Multiple pixel circuits are fabricated on one side of the substrate;

[0067] The substrate is first patterned to obtain multiple grooves;

[0068] Multiple bridging wires are fabricated in the groove;

[0069] The substrate is subjected to a second patterning process to obtain a substrate including multiple bridge portions and multiple island portions, thereby obtaining a display panel;

[0070] Multiple islands form multiple island groups. The island groups include a first island, a second island, a third island, and a fourth island arranged in a quadrilateral. The first island and the second island are adjacent in the first direction. The first island has a first position and a third position, and the second island has a second position and a fourth position.

[0071] The multiple bridging wires include a first bridging wire and a second bridging wire located between the first island and the second island; wherein, the two ends of the first bridging wire are respectively connected to the circuit structure of the pixel circuit at the first position and the circuit structure of the pixel circuit at the second position, and the two ends of the second bridging wire are respectively connected to the circuit structure of the pixel circuit at the third position and the circuit structure of the pixel circuit at the fourth position; the distance between the first midpoint of the first bridging wire and the second midpoint of the second bridging wire is less than the distance between the first position and the third position, and less than the distance between the second position and the fourth position; the first bridging wire includes multiple inflection points, including a first inflection point and a second inflection point, the first inflection point and the second inflection point are located on both sides of the first midpoint, the distance between the first inflection point and the first midpoint is greater than the distance between the first position and the first midpoint, and the distance between the second inflection point and the first midpoint is greater than the distance between the second position and the first midpoint.

[0072] In one embodiment, performing a second patterning process on the substrate includes:

[0073] The photomask is placed on one side of the substrate, and the orthographic projection of the photomask on the substrate covers the bridging wires and pixel circuits.

[0074] The mask and the substrate are etched. During the etching process, the mask and the substrate are etched at the same time to obtain an island that includes a central region and an edge region surrounding the central region. The thickness of the edge region gradually decreases in the direction that moves away from the central region.

[0075] Preferably, etching the photomask and substrate includes: etching the photomask and substrate using a dry etching method;

[0076] Preferably, the photomask comprises photoresist.

[0077] A fourth aspect of this application provides a display device, including the display panel described above, or including a display panel prepared by the preparation method described above.

[0078] This application provides a first bridge wire and a second bridge wire between the first island and the second island. The shapes of the first bridge wire and the second bridge wire are conducive to the stretching and shrinking of the display panel. When stretching the display panel, a large stretching rate can be achieved with a small deformation angle of the first bridge wire and the second bridge wire, which can maximize the utilization of the space between adjacent islands. Attached Figure Description

[0079] Figure 1 This is a top view of the display panel without stretching in one embodiment of this application.

[0080] Figure 2 This is a top view of the stretched display panel structure in one embodiment of this application.

[0081] Figure 3 This is a top view of the display panel without stretching in another embodiment of this application.

[0082] Figure 4 This is a top view of the display panel without stretching in another embodiment of this application.

[0083] Figure 5 This is a top view of the display panel without stretching in another embodiment of this application.

[0084] Figure 6 for Figure 1 A magnified view of the display panel at point A.

[0085] Figure 7 for Figure 1 A magnified view of the display panel at point B.

[0086] Figure 8 for Figure 1 A magnified schematic diagram of a portion of the display panel at point C.

[0087] Figure 9 for Figure 1 Another magnified view of the display panel at point C.

[0088] Figure 10 This is a flowchart of a method for manufacturing a display panel in one embodiment of this application.

[0089] Figures 11-12 This is a schematic diagram of the process of forming edge regions by etching a substrate using a soft mask in this application.

[0090] Figures 13-19 This is a schematic diagram of the manufacturing process of the display panel in one embodiment of this application. Detailed Implementation

[0091] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0092] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0093] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0094] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0095] In current display panels, subpixels are connected by bridge lines. The stretchability of the bridge lines limits the stretchability of the display panel, resulting in a low stretchability of current stretchable display panels and a tendency for the lines to break during stretching. This seriously affects the display and usability of stretchable display panels.

[0096] Based on this, the first aspect of this application provides a display panel, the structural schematic diagram of which is shown below. Figure 1 and Figure 2 As shown, the display panel includes: a substrate 100, which includes multiple islands 110, which together form multiple island groups a. Each island group a includes a first island 111, a second island 112, a third island 113, and a fourth island 114 arranged in a quadrilateral shape. The first island 111 and the second island 112 are adjacent in a first direction x. The first island 111 has a first position 1111 and a third position 1112, and the second island 112 has a second position 1121 and a fourth position 1122. Multiple sub-pixels 200 are located on one side of each island 110. Multiple pixel circuits (not shown) are located on corresponding islands 110 and are used to drive the corresponding sub-pixels 200. Multiple bridge wires 400 include a first bridge wire 410 and a second bridge wire 420 located between the first island 111 and the second island 112. The two ends of the first bridge wire 410 are respectively connected to the circuit structure of the pixel circuit at the first position 1111 and the second island 112. The second bridge wire 420 is connected to the circuit structure of the pixel circuit at the second position 1121. The two ends of the second bridge wire 420 are respectively connected to the circuit structures of the pixel circuit at the third position 1112 and the pixel circuit at the fourth position 1122. The distance between the first midpoint 411 of the first bridge wire 410 and the second midpoint 421 of the second bridge wire 420 is less than the distance between the first position 1111 and the third position 1112, and less than the distance between the second position 1121 and the fourth position 1122. The first bridge wire 410 includes multiple inflection points, including a first inflection point 401 and a second inflection point 402. The first inflection point 401 and the second inflection point 402 are located on both sides of the first midpoint 411. The distance between the first inflection point 401 and the first midpoint 411 is greater than the distance between the first position 1111 and the first midpoint 411. The distance between the second inflection point 402 and the first midpoint 411 is greater than the distance between the second position 1121 and the first midpoint 411.

[0097] For example, for ease of explanation, in Figure 1 In the diagram, the centroid of the first island 111 is marked as S1, the centroid of the second island 112 is marked as S2, the centroid of the third island 113 is marked as S3, and the centroid of the fourth island 114 is marked as S4.

[0098] It is understandable that the pixel circuitry can be located between the sub-pixel 200 and the substrate 100.

[0099] It should be noted that the first bridge connection 410 and the second bridge connection 420 are insulated from each other; the centroid S1 of the first island 111 refers to the center of the area of ​​the cross section of the first island 111 in the direction parallel to the plane of the substrate 100, and the centroid S2 of the second island 112 refers to the center of the area of ​​the cross section of the second island 112 in the direction parallel to the plane of the substrate 100.

[0100] It is important to note in the manual that the first midpoint 411 of the first bridge wire 410 refers to the midpoint of the length of the first bridge wire 410, and the second midpoint 421 of the second bridge wire 420 refers to the midpoint of the length of the second bridge wire 420. All midpoints of bridge wires mentioned in this document refer to the midpoint of the bridge wire length.

[0101] This application provides a first bridge wire 410 and a second bridge wire 420 between the first island portion 111 and the second island portion 112. The shapes of the first bridge wire 410 and the second bridge wire 420 are conducive to the stretching and shrinking of the display panel. When stretching the display panel, a large stretching rate can be achieved with a small deformation angle of the first bridge wire 410 and the second bridge wire 420, which can maximize the utilization of the space between adjacent island portions 110.

[0102] For example, the third island portion 113 and the fourth island portion 114 are adjacent in the first direction x, the first island portion 111 and the third island portion 113 are adjacent in the second direction y, and the second island portion 112 and the fourth island portion 114 are adjacent in the second direction y. The first direction x intersects the second direction y.

[0103] For example, the first position 1111 and the third position 1112 are located on the side of the first island portion 111 close to the second island portion 112, and the second position 1121 and the fourth position 1122 are located on the side of the second island portion 112 close to the first island portion 111; the first position 1111 and the second position 1121 are both located on the first side of the line connecting the centroids of the first island portion 111 and the second island portion 112, and the third position 1112 and the fourth position 1122 are both located on the second side of the line connecting the centroids, opposite to the side where the first position 1111 and the second position 1121 are located.

[0104] It should be noted that, for ease of description, the four adjacent island portions 110 are referred to as the first island portion 111, the second island portion 112, the third island portion 113, and the fourth island portion 114. This does not imply that the four island portions 110 are necessarily different. The first island portion 111, the second island portion 112, the third island portion 113, and the fourth island portion 114 merely reflect the relativity of the four island portions 110. The arrangement of the first island portion 111, the second island portion 112, the third island portion 113, and the fourth island portion 114 is not restricted, as long as it satisfies the requirements. A group of islands a includes a first island portion 111, a second island portion 112, a third island portion 113, and a fourth island portion 114 arranged in a quadrilateral shape. The first island portion 111 and the second island portion 112 are adjacent in the first direction x, the third island portion 113 and the fourth island portion 114 are adjacent in the first direction x, the first island portion 111 and the third island portion 113 are adjacent in the second direction y, and the second island portion 112 and the fourth island portion 114 are adjacent in the second direction y. This should not be construed as a limitation of this application; for example, refer to... Figure 1 In island group a, in the first direction x, the first island portion 111 and the second island portion 112 are arranged in sequence; in the second direction y, the first island portion 111 and the third island portion 113 are arranged in sequence, and the second island portion 112 and the fourth island portion 114 are arranged in sequence; for example, refer to Figure 3 In the first direction x, the second island portion 112 and the first island portion 111 are arranged in sequence; in the second direction y, the second island portion 112 and the fourth island portion 114 are arranged in sequence; and the first island portion 111 and the third island portion 113 are arranged in sequence. For example, refer to... Figure 4 In the second direction y, the third island portion 113 and the first island portion 111 are arranged in sequence; in the first direction x, the third island portion 113 and the fourth island portion 114 are arranged in sequence. For example, refer to... Figure 5 In the second direction y, the fourth island 114 and the second island 112 are arranged in sequence, and in the first direction x, the fourth island 114 and the third island 113 are arranged in sequence.

[0105] In one embodiment, the second bridging cable 420 includes multiple inflection points, including a third inflection point 403 and a fourth inflection point 404. The third inflection point 403 and the fourth inflection point 404 are located on either side of the second midpoint 421. The distance between the third inflection point 403 and the second midpoint 421 is greater than the distance between the third position 1112 and the second midpoint 421, and the distance between the fourth inflection point 404 and the second midpoint 421 is greater than the distance between the fourth position 1122 and the second midpoint 421. Therefore, the second bridging cable 420 can be stretched over a longer distance.

[0106] In one embodiment, refer to Figure 1Along the length of the first bridge wire 410 from the first position 1111 to the second position 1121, the first bridge wire 410 includes a first segment 412, a second segment 413, a third segment 414, and a fourth segment 415 connected sequentially. The first segment 412 extends from the first position 1111 in a direction away from the second bridge wire 420 to the first inflection point 401. The second segment 413 extends from the first inflection point 401 in a direction close to the second bridge wire 420 to the first midpoint 411. The third segment 414 extends from the first midpoint 411 in a direction away from the second bridge wire 420 to the second inflection point 402. The fourth segment 415 extends from the second inflection point 402 in a direction close to the second bridge wire 420 to the second position 1121. Along the length of the second bridge connection 420 from the third position 1112 to the fourth position 1122, the second bridge connection 420 includes a fifth segment 422, a sixth segment 423, a seventh segment 424, and an eighth segment 425 connected sequentially. The fifth segment 422 extends from the third position 1112 away from the first bridge connection 410 to the third inflection point 403. The sixth segment 423 extends from the third inflection point 403 towards the first bridge connection 410 to the second midpoint 421. The seventh segment 424 extends from the second midpoint 421 away from the first bridge connection 410 to the fourth inflection point 404. The eighth segment 425 extends from the fourth inflection point 404 towards the first bridge connection 410 to the fourth position 1122. Therefore, the structural arrangement of the first bridge connection 410 and the second bridge connection 420 is relatively reasonable, which facilitates full utilization of the space between the first island portion 111 and the second island portion 112, and the first bridge connection 410 and the second bridge connection 420 have a large elongation ratio.

[0107] It is understandable that the second segment 413 and the third segment 414 are connected at the first midpoint 411, and the first midpoint 411 is an inflection point.

[0108] In one embodiment, both the first bridge wire 410 and the second bridge wire 420 are symmetrical with respect to the line connecting the first midpoint 411 and the second midpoint 421. This facilitates the fabrication of the first bridge wire 410 and the second bridge wire 420.

[0109] In one embodiment, refer to Figure 1The third island 113 has a fifth position 1131 and a seventh position 1132, and the fourth island 114 has a sixth position 1141 and an eighth position 1142; the multiple bridge connections 400 also include a third bridge connection 430 and a fourth bridge connection 440 located between the third island 113 and the fourth island 114; the two ends of the third bridge connection 430 are respectively connected to the circuit structure of the pixel circuit at the fifth position 1131 and the circuit structure of the pixel circuit at the sixth position 1141, and the two ends of the fourth bridge connection 440 are respectively connected to the circuit structure of the pixel circuit at the seventh position 1132 and the... The circuit structure of the pixel circuit at eight positions 1142 is connected as follows: the fifth position 1131 and the seventh position 1132 are located on the side of the third island 113 near the fourth island 114, and the sixth position 1141 and the eighth position 1142 are located on the side of the fourth island 114 near the third island 113; the fifth position 1131 and the sixth position 1141 are both located on the third side of the line connecting the centroids of the third island 113 and the fourth island 114, and the third position 1112 and the fourth position 1122 are both located on the fourth side of the line connecting the centroids, opposite to the side where the fifth position 1131 and the sixth position 1141 are located. Therefore, the third bridge connection 430 and the fourth bridge connection 440 between the third island 113 and the fourth island 114 facilitate the stretching and contraction of the display panel. When stretching the display panel, a larger stretching rate can be achieved with a smaller deformation angle of the third bridge connection 430 and the fourth bridge connection 440, maximizing the utilization of space between adjacent islands 110.

[0110] In one embodiment, the bridging wire 400 located between the third island portion 113 and the fourth island portion 114 has the same structure as the bridging wire 400 located between the first island portion 111 and the second island portion 112. Therefore, the structural arrangement of the third bridging wire 430 and the fourth bridging wire 440 is more reasonable, which facilitates full utilization of the space between the third island portion 113 and the fourth island portion 114, and the third bridging wire 430 and the fourth bridging wire 440 have a larger elongation.

[0111] In one embodiment, both the first bridge wire 410 and the second bridge wire 420 are curved. Therefore, the first bridge wire 410 and the second bridge wire 420 are relatively long, which can further improve the stretchability of the display panel.

[0112] In one embodiment, refer to Figure 1The first island 111 has a ninth position 1113 and an eleventh position 1114, and the third island 113 has a tenth position 1133 and a twelfth position 1134. The multiple bridge connections 400 also include a fifth bridge connection 450 and a sixth bridge connection 460 located between the first island 111 and the third island 113. The two ends of the fifth bridge connection 450 are respectively connected to the circuit structures of the pixel circuits at the ninth position 1113 and the tenth position 1133, and the two ends of the sixth bridge connection 460 are respectively connected to the circuit structures of the pixel circuits at the eleventh position 1114 and the twelfth position 1134. The circuit structure connection of the pixel circuit at position 1134; the ninth position 1113 and the eleventh position 1114 are located on the side of the first island 111 close to the third island 113, and the tenth position 1133 and the twelfth position 1134 are located on the side of the third island 113 close to the first island 111; the ninth position 1113 and the tenth position 1133 are both located on the fifth side of the line connecting the centroids of the first island 111 and the third island 113, and the eleventh position 1114 and the twelfth position 1134 are both located on the sixth side of the line connecting the centroids, opposite to the side where the ninth position 1113 and the tenth position 1133 are located.

[0113] In one embodiment, refer to Figure 1 The distance between the third midpoint 451 of the fifth bridge connection 450 and the fourth midpoint 461 of the sixth bridge connection 460 is less than the distance between the ninth position 1113 and the eleventh position 1114, and less than the distance between the tenth position 1133 and the twelfth position 1134. This facilitates full utilization of the space between the first island portion 111 and the third island portion 113, and further improves the stretchability of the display panel.

[0114] In one embodiment, refer to Figure 1 The fifth bridge connection 450 includes multiple inflection points, including the fifth inflection point 405 and the sixth inflection point 406. The fifth inflection point 405 and the sixth inflection point 406 are located on both sides of the third midpoint 451. The distance between the fifth inflection point 405 and the third midpoint 451 is greater than the distance between the ninth position 1113 and the third midpoint 451. The distance between the sixth inflection point 406 and the third midpoint 451 is greater than the distance between the tenth position 1133 and the third midpoint 451. The sixth bridge connection 460 includes multiple inflection points, including the seventh inflection point 407 and the eighth inflection point 408. The seventh inflection point 407 and the eighth inflection point 408 are located on both sides of the fourth midpoint 461. The distance between the seventh inflection point 407 and the fourth midpoint 461 is greater than the distance between the eleventh position 1114 and the fourth midpoint 461. The distance between the eighth inflection point 408 and the fourth midpoint 461 is greater than the distance between the twelfth position 1134 and the fourth midpoint 461.

[0115] In one embodiment, refer to Figure 1Along the length of the fifth bridge connection 450 from the ninth position 1113 to the tenth position 1133, the fifth bridge connection 450 includes a ninth segment 452, a tenth segment 453, an eleventh segment 454, and a twelfth segment 455 connected in sequence. The ninth segment 452 extends from the ninth position 1113 in a direction away from the sixth bridge connection 460 to the fifth inflection point 405. The tenth segment 453 extends from the fifth inflection point 405 in a direction close to the sixth bridge connection 460 to the third midpoint 451. The eleventh segment 454 extends from the third midpoint 451 in a direction away from the sixth bridge connection 460 to the sixth inflection point 406. The twelfth segment 455 extends from the sixth inflection point 406 in a direction close to the sixth bridge connection 460 to the tenth position 1133. Along the length of the sixth bridge connection 460 from position 1114 to position 1234, the sixth bridge connection 460 includes a thirteenth segment 462, a fourteenth segment 463, a fifteenth segment 464, and a sixteenth segment 465 connected in sequence. The thirteenth segment 462 extends from position 1114 away from the fifth bridge connection 450 to the seventh inflection point 407. The fourteenth segment 463 extends from the seventh inflection point 407 towards the fifth bridge connection 450 to the fourth midpoint 461. The fifteenth segment 464 extends from the fourth midpoint 461 away from the fifth bridge connection 450 to the eighth inflection point 408. The sixteenth segment 465 extends from the eighth inflection point 408 towards the fifth bridge connection 450 to the twelfth position 1134. Therefore, the structure of the fifth bridge connection 450 and the sixth bridge connection 460 is relatively reasonable, which is conducive to making full use of the space between the first island 111 and the third island 113, and the fifth bridge connection 450 and the sixth bridge connection 460 have a large elongation.

[0116] It should be noted that both the third midpoint 451 and the fourth midpoint 461 are inflection points.

[0117] In one embodiment, both the fifth bridge wire 450 and the sixth bridge wire 460 are symmetrical with respect to the line connecting the third midpoint 451 and the fourth midpoint 461. This facilitates the fabrication of the fifth bridge wire 450 and the sixth bridge wire 460.

[0118] In one embodiment, both the fifth bridge connection 450 and the sixth bridge connection 460 are curved. Therefore, the fifth bridge connection 450 and the sixth bridge connection 460 are relatively long, which can further improve the stretchability of the display panel.

[0119] In one embodiment, refer to Figure 1The second island 112 has a thirteenth position 1123 and a fifteenth position 1124, and the fourth island 114 has a fourteenth position 1143 and a sixteenth position 1144. The multiple bridge connections also include a seventh bridge connection 470 and an eighth bridge connection 480 located between the second island 112 and the fourth island 114. The two ends of the seventh bridge connection 470 are respectively connected to the circuit structures of the pixel circuits at the thirteenth position 1123 and the fourteenth position 1143, and the two ends of the eighth bridge connection 480 are respectively connected to the circuit structures of the pixel circuits at the fifteenth position 1124 and the sixteenth position 1144. The circuit structure of pixel circuit 1144 is connected as follows: the thirteenth position 1123 and the fifteenth position 1124 are located on the side of the second island 112 near the fourth island 114, and the fourteenth position 1143 and the sixteenth position 1144 are located on the side of the fourth island 114 near the second island 112; the thirteenth position 1123 and the fourteenth position 1143 are both located on the seventh side of the line connecting the centroids of the second island 112 and the fourth island 114, and the fifteenth position 1124 and the sixteenth position 1144 are both located on the eighth side of the line connecting the centroids, opposite to the side where the thirteenth position 1123 and the fourteenth position 1143 are located.

[0120] In one embodiment, the bridging cable 400 located between the first island portion 111 and the third island portion 113 has the same structure as the bridging cable 400 located between the second island portion 112 and the fourth island portion 114. This facilitates the fabrication of the bridging cable 400.

[0121] In one embodiment, refer to Figure 1 Multiple islands 110 are arranged along a first direction x and a second direction y, respectively, with the first direction x intersecting the second direction y. Four bridging cables 400 are connected between the first island 111, second island 112, third island 113, and fourth island 114, forming a centrally symmetrical shape. This facilitates the fabrication of the bridging cables and allows for higher space utilization between the first island 111, second island 112, third island 113, and fourth island 114, thus improving the stretchability of the display panel.

[0122] In one embodiment, the shape formed by the four bridging lines 400 between the first island 111, the second island 112, the third island 113, and the fourth island 114 is axially symmetrical. For example, the axis of symmetry can be the line connecting the centroids of the first island 111 and the fourth island 114, the line connecting the centroids of the second island 112 and the third island 113, the line connecting the midpoints of two opposing bridging lines 400 in the first direction x, or the line connecting the midpoints of two opposing bridging lines 400 in the second direction y.

[0123] In one embodiment, the inflection points on both sides of the centroid connecting line between the first island 111 and the fourth island 114 are close to each other and extend towards the center of symmetry of the pattern formed by the four bridging lines 400; and / or, the inflection points on both sides of the centroid connecting line between the second island 112 and the third island 113 are close to each other and extend towards the center of symmetry of the pattern formed by the four bridging lines 400. This facilitates obtaining longer bridging lines 400, which further improves the stretchability of the display panel.

[0124] It should be noted that the center of symmetry is the intersection of the line connecting the centroids of the first island 111 and the fourth island 114 with the line connecting the centroids of the second island 112 and the third island 113.

[0125] In one embodiment, the angle between the inflection point and the center of symmetry of the line connecting the bridge wire 400 connected to the pixel circuit of the first island 111 and the centroid line connecting the first island 111 and the fourth island 114 is 20-25°, preferably 22.5°; and / or, the angle between the inflection point and the center of symmetry of the line connecting the bridge wire connected to the pixel circuit of the fourth island 114 and the centroid line connecting the first island 111 and the fourth island 114 is 20-25°, preferably 22.5°. 5°; and / or, the angle between the line connecting the inflection point of the bridge wire connected to the pixel circuit of the second island 112 and the center of symmetry and the line connecting the centroid of the second island 112 and the third island 113 is 20° to 25°, preferably 22.5°; and / or, the angle between the line connecting the inflection point of the bridge wire connected to the pixel circuit of the third island 113 and the center of symmetry and the line connecting the centroid of the second island 112 and the third island 113 is 20° to 25°, preferably 22.5°. This facilitates obtaining a longer bridge wire 400, which is beneficial for further improving the stretchability of the display panel.

[0126] In one embodiment, refer to Figure 1 The display panel also includes multiple bridge sections 500, which connect adjacent island sections 110. Bridge wires 400 are located on the bridge sections 500, and the extension directions of the bridge sections 500 and bridge wires 400 are consistent. Therefore, the bridge sections 500 can effectively protect the bridge wires 400, effectively preventing defects such as wire breakage, and improving the yield rate of the display panel.

[0127] In one embodiment, refer to Figure 1 A sub-pixel 200 is located in an island section 110, and the first bridge connection 410 and the second bridge connection 420 are respectively located in a bridge section.

[0128] In one embodiment, refer to Figure 1 , Figure 6 and Figure 7The multiple bridge portions 500 include a first bridge portion 510 and a second bridge portion 520. The first bridge portion 510 includes a first groove 511, and a first bridging wire 410 is located within the first groove 511. The second bridge portion 520 includes a second groove 521, and a second bridging wire 420 is located within the second groove 521. Therefore, the bridge portions 500 can effectively protect the bridging wire 400, effectively preventing defects such as wire breakage, and improving the yield rate of the display panel.

[0129] In one embodiment, refer to Figure 1 The first bridge portion 510 and the second bridge portion 520, corresponding to the first midpoint 411 and the second midpoint 421, are connected as one unit. This facilitates the restoration of the stretched display panel to its state before stretching.

[0130] In one embodiment, the substrate 100 includes a flexible substrate. It should be noted that the first bridging wire 410 and the second bridging wire 420 preferably have good intrinsic tensile strength. The materials of the first bridging wire 410 and the second bridging wire 420 can be the same or different, and can be flexibly selected according to actual conditions. In one embodiment, the material of the first bridging wire 410 includes, but is not limited to, metals, conductive polymers, etc., and the material of the second bridging wire 420 includes, but is not limited to, metals, conductive polymers, etc. In a specific embodiment, the first bridging wire 410 includes at least one of titanium, aluminum, silver, and molybdenum, and the material of the second bridging wire 420 includes at least one of titanium, aluminum, silver, and molybdenum.

[0131] It is understandable that when the display panel is stretched, the bridge portion 500 deforms, and significant stress is generated at the connection between the bridge portion 500 and the island portion 110, which in turn affects the encapsulation of the display panel. To reduce the impact of stress during stretching on the display panel, in one embodiment, reference is made to... Figure 1 and Figure 8 The island portion 110 includes a central region 101 and an edge region 102 surrounding the central region 101. The sub-pixel 200 is located in the central region 101, and the thickness of the edge region 102 gradually decreases in the direction gradually moving away from the central region 101. This gradual decrease in the thickness of the edge region 102 helps to alleviate stress concentration at the connection between the bridge portion 500 and the island portion 110. In one specific embodiment, the longitudinal section of the edge region 102 near the sub-pixel 200 has an arc shape.

[0132] In one embodiment, refer to Figure 1The display panel also includes: multiple bridge sections 500, which connect adjacent island sections 110, with bridging lines 400 located on the bridge sections 500. The extension directions of the bridge sections 500 and bridging lines 400 are consistent. Each bridge section 500 includes a connecting area 501 and a main body area 502. The connecting area 501 is connected to the island section 110, and the thickness of the connecting area 501 gradually decreases from the main body area 502 towards the connecting area 501. For example, the longitudinal section of the connecting area 501 near the bridging line 400 is arc-shaped. This helps to alleviate stress concentration at the connection between the bridge section 500 and the island section 110.

[0133] It is understandable that at the connection between the bridge section 500 and the island section 110, the thickness of the connection area 501 is the same as the thickness of the edge area 102.

[0134] In one embodiment, refer to Figure 1 The island portion 110 has multiple recessed edges, with the first position 1111, the second position 1121, the third position 1112, and the fourth position 1122 each located at a recessed edge. This provides sufficient space for the island portion 110, allowing each sub-pixel 200 to contain more pixel units, resulting in a better display effect after stretching the display panel. Furthermore, the edge recesses increase the distance between the first position 1111 and the first inflection point 401 of the first bridge wire 410, and the distance between the second position 1121 and the second inflection point 402 of the first bridge wire 410, making the first bridge wire 410 longer and further improving the stretchability of the display panel. Similarly, the longer second bridge wire 420 further enhances the stretchability of the display panel.

[0135] For example, the edges of the cross-sectional shape of the island portion 110 form a rectangle, the four corners of the rectangle are recessed, the resulting shape includes an octagon, and the sides of the octagon corresponding to the four corners of the rectangle have triangular protrusions, the protrusions being recessed edges away from the edges of the octagons.

[0136] In one embodiment, refer to Figure 1 The island portion 110 includes a central region 101 and an edge region 102 surrounding the central region 101, with the recessed edge located in the edge region 102.

[0137] In one embodiment, refer to Figure 8 and Figure 9 The edge region 102, extending from the recessed edge towards the central region 101, includes a first notch 103 or a first opening 104; the first notch 103 or the first opening 104 penetrates the edge region 102 along the thickness direction of the substrate 100. This facilitates stress concentration at the contact point between the island portion 110 and the bridge portion 500 during deformation of the buffer bridge portion 500, thereby reducing the impact of stress on the display panel encapsulation layer and improving product yield.

[0138] In one embodiment, refer to Figure 1 , Figure 6 and Figure 7 The bridge portion 500 includes multiple transition sub-portions 503, each transition sub-portion 503 including a second notch 504 or a second opening (not shown in the figure); the second notch 504 or the second opening penetrates the transition sub-portion 503 along the thickness direction of the bridge portion 500. Therefore, since the deformation of the transition sub-portion 503 is relatively large and stress is easily concentrated, providing the second notch 504 or the second opening in the transition sub-portion 503 can alleviate stress concentration, making the bridge portion 500 easier to stretch and effectively preventing breakage of the bridge portion 500. This effectively protects the first bridge connection 410 and the second bridge connection 420, improving the reliability of the display panel.

[0139] In one embodiment, refer to Figure 1 The first bridge connection 410 includes a first inflection point 401 and a second inflection point 402, with the first inflection point 401, the second inflection point 402, and the first midpoint 411 each located at a turning sub-section 503. The second bridge connection 420 includes a third inflection point 403 and a fourth inflection point 404, with the third inflection point 403, the fourth inflection point 404, and the second midpoint 421 each located at a turning sub-section 503. Thus, the shapes of the first bridge connection 410 and the second bridge connection 420 correspond to the shape of the bridge section 500, further enhancing the protective effect of the bridge section 500 on the first bridge connection 410 and the second bridge connection 420.

[0140] It is understandable that the matching settings between the third bridge wiring 430 and the fourth bridge wiring 440 and the bridge section 500, the matching settings between the fifth bridge wiring 450 and the sixth bridge wiring 460 and the bridge section 500, and the matching settings between the seventh bridge wiring 470 and the eighth bridge wiring 480 and the bridge section 500 can refer to the matching settings between the first bridge wiring 410 and the second bridge wiring 420 and the bridge section 500.

[0141] It is understandable that there are no restrictions on the type of display panel mentioned above; it can be an OLED display panel or an LCD display panel, and the choice can be made flexibly according to the actual situation.

[0142] In one embodiment, the substrate includes a flexible substrate, and the material of the flexible substrate includes, but is not limited to, polyimide materials.

[0143] A second aspect of this application provides a display panel, as shown in [reference] Figure 1 , Figure 8 and Figure 9The display panel includes: a substrate 100, comprising multiple islands 110, each island 110 including a central region 101 and an edge region 102 surrounding the central region 101, the thickness of the edge region 102 gradually decreasing in a direction gradually moving away from the central region 101; multiple sub-pixels 200, each located on a corresponding island 110, with the sub-pixels 200 located in the central region 101; multiple pixel circuits, each located on a corresponding island 110, for driving the corresponding sub-pixels 200; and multiple bridging wires 400, located between adjacent islands 110, with both ends of the bridging wires 400 connected to the circuit structure of the pixel circuits of two adjacent islands 110. Therefore, during the stretching deformation process of the display panel, the stress in the edge region 102 of the island 110 is almost not concentrated, improving the yield of the display panel.

[0144] It should be noted that the substrate 100, sub-pixel 200, pixel circuit, and bridging wire 400 are the same as described above, and will not be repeated here.

[0145] In one embodiment, refer to Figure 1 , Figure 8 and Figure 9 The island portion 110 has multiple edge recesses, with the edges of these recesses located in edge regions 102. These edge regions 102, extending towards the central region 101, include a first notch 103 or a first opening 104. The first notch 103 or the first opening 104 penetrates the edge regions 102 along the thickness direction of the substrate 100. This design helps to reduce stress concentration at the contact point between the island portion 110 and the bridge portion 500 during deformation, thereby mitigating the impact of stress on the display panel encapsulation layer and improving product yield.

[0146] It should be noted that the display panel in this embodiment can be combined with the display panel described above in whole or in part, which will not be elaborated further here.

[0147] The second aspect of this application provides a method for fabricating a display panel, the flowchart of which is shown below. Figure 10 The preparation method includes:

[0148] S100: Multiple pixel circuits are fabricated on one side of the substrate.

[0149] It should be noted that the multiple pixel circuits are the same as described above, and will not be elaborated on further here.

[0150] S200: Prepare multiple bridging wires in the groove.

[0151] It should be noted that the bridging wire is the same as described above, and will not be repeated here.

[0152] S300: Perform a second patterning process on the substrate to obtain a substrate including multiple bridges and multiple islands, thereby obtaining a display panel.

[0153] It should be noted that the bridge section, island section, and substrate are the same as described above, and will not be repeated here.

[0154] It should be noted that multiple islands form multiple island groups. Each island group includes a first island, a second island, a third island, and a fourth island arranged in a quadrilateral shape. The first and second islands are adjacent in the first direction. The first island has a first position and a third position, and the second island has a second position and a fourth position. Multiple bridging lines include a first bridging line and a second bridging line located between the first and second islands. The two ends of the first bridging line are connected to the circuit structures of the pixel circuits at the first and second positions, respectively. The two ends of the second bridging line are connected to the circuit structures of the pixel circuits at the third and fourth positions, respectively. The distance between the first midpoint of the first bridging line and the second midpoint of the second bridging line is less than the distance between the first and third positions, and also less than the distance between the second and fourth positions. The first bridging line includes multiple inflection points, including a first inflection point and a second inflection point. The first and second inflection points are located on either side of the first midpoint. The distance between the first inflection point and the first midpoint is greater than the distance between the first position and the first midpoint, and the distance between the second inflection point and the first midpoint is greater than the distance between the second position and the first midpoint.

[0155] It should be noted that the display panel prepared by the method in this embodiment can be combined with the display panel described above in whole or in part, which will not be elaborated further here.

[0156] In one embodiment, the second patterning process on the substrate includes: placing a mask on one side of the substrate, the orthographic projection of the mask on the substrate covering the bridge wires and pixel circuits; etching the mask and the substrate, wherein the mask and the substrate are etched simultaneously during the etching process to obtain an island including a central region and an edge region surrounding the central region, wherein the thickness of the edge region gradually decreases in the direction gradually moving away from the central region.

[0157] In one embodiment, etching the photomask and the substrate includes: etching the photomask and the substrate using a dry etching method.

[0158] In one embodiment, the photomask comprises photoresist.

[0159] In one specific embodiment, a second patterning process is performed on the substrate using a soft mask (photoresist) to form the island, as shown in the reference. Figures 11-12The process of performing a second patterning process on the substrate includes: placing a photoresist soft mask 10 on one side of the substrate 1, with the photoresist soft mask 10 covering the pixel circuit (not shown in the figure); etching the substrate 1 with plasma; during the etching process, as the etching process simultaneously etches the substrate 1 and the photoresist soft mask 10, a relatively gentle taper morphology appears at the etching boundary, forming the edge region 102 of the island (see reference). Figure 12 That is, the longitudinal section of the obtained edge region 102 has an arc shape near the sub-pixel. In a specific embodiment, a flexible substrate including an island and a bridge is formed by etching with the same mask. During etching, the mask covers the bridge lines. Under the action of the soft mask, the thickness of the first bridge gradually decreases in the direction gradually moving away from the first groove, and the thickness of the second bridge gradually decreases in the direction gradually moving away from the second groove.

[0160] In one specific embodiment, the flowchart of the display panel fabrication method is as follows: Figures 13-19 As shown, the method for manufacturing the display panel includes:

[0161] 1. A substrate 1 is formed by coating PI (polyimide) onto a carrier plate 20, such as... Figure 13 As shown;

[0162] 2. The driving circuit structure 30 is formed using conventional AMOLED (Active Matrix Organic Light Emitting Diode) array technology, such as... Figure 14 As shown;

[0163] 3. The first groove 511, the second groove (not shown in the figure), and the third groove 40 are formed through a patterning process, such as... Figure 15 As shown;

[0164] 4. A first bridging wire 410 is fabricated in the first groove 511, a second bridging wire (not shown in the figure) is fabricated in the second groove, and a metal lead wire 50 is fabricated in the third groove 40. The two ends of the first bridging wire 410 are electrically connected to the metal lead wire 50, and the two ends of the second bridging wire are electrically connected to the metal lead wire (not shown in the figure). Figure 16 As shown;

[0165] 5. An organic layer 60 is formed on the surfaces of the metal lead 50, the first bridging wire 410, and the second metal bridging wire away from the substrate 1, such as... Figure 17 As shown;

[0166] 6. Cover the organic layer 60 with a soft mask, and remove the remaining substrate 1 by patterning to obtain a substrate 100 including the bridge portion 500 and the island portion 110, the first bridge portion 510 and the edge region 102 of the island portion 110, as shown. Figure 18 As shown;

[0167] 7. The above structure is encapsulated using a vapor deposition encapsulation process, and the carrier plate 20 is removed by laser lift-off (LLO) to form a display panel, such as... Figure 19 As shown.

[0168] Understandable Figures 13-19 The schematic diagram of the display panel fabrication process shown only illustrates the positional relationship between the first bridge portion and the island portion. The positional relationship between the second bridge portion and the island portion can be found by referring to... Figures 13-19 I will not go into too much detail here.

[0169] A fourth aspect of this application provides a display device that includes the aforementioned display panel.

[0170] It should be noted that the display panel is the same as described above, so we will not go into further detail here.

[0171] It is understood that, in addition to the display panel mentioned above, the display device may also include the structures that a conventional display device should have. For example, the display device may also include, but is not limited to, a frame structure, a cover plate, etc., which will not be elaborated further here.

[0172] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0173] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display panel, characterized in that, include: The substrate includes multiple island portions, which together form multiple island groups. Each island group includes a first island portion, a second island portion, a third island portion, and a fourth island portion arranged in a quadrilateral shape. The first island portion and the second island portion are adjacent in a first direction. The first island portion has a first position and a third position, and the second island portion has a second position and a fourth position. Multiple sub-pixels are located on the corresponding island portions; Multiple pixel circuits are located on the corresponding island portions, and are used to drive the corresponding sub-pixels; as well as Multiple bridge connections, including a first bridge connection and a second bridge connection located between the first island and the second island; Wherein, the two ends of the first bridging wire are respectively connected to the circuit structure of the pixel circuit at the first position and the circuit structure of the pixel circuit at the second position; the two ends of the second bridging wire are respectively connected to the circuit structure of the pixel circuit at the third position and the circuit structure of the pixel circuit at the fourth position; the distance between the first midpoint of the first bridging wire and the second midpoint of the second bridging wire is less than the distance between the first position and the third position, and less than the distance between the second position and the fourth position; The first bridge connection includes multiple inflection points, including a first inflection point and a second inflection point. The first inflection point and the second inflection point are located on both sides of the first midpoint. The distance between the first inflection point and the first midpoint is greater than the distance between the first position and the first midpoint. The distance between the second inflection point and the first midpoint is greater than the distance between the second position and the first midpoint.

2. The display panel according to claim 1, characterized in that, The second bridge connection includes multiple inflection points, including a third inflection point and a fourth inflection point. The third inflection point and the fourth inflection point are located on both sides of the second midpoint. The distance between the third inflection point and the second midpoint is greater than the distance between the third position and the second midpoint, and the distance between the fourth inflection point and the second midpoint is greater than the distance between the fourth position and the second midpoint. Preferably, the first position and the third position are located on the side of the first island portion closer to the second island portion, and the second position and the fourth position are located on the side of the second island portion closer to the first island portion; the first position and the second position are both located on the first side of the line connecting the centroids of the first island portion and the second island portion, and the third position and the fourth position are both located on the second side of the line connecting the centroids, opposite to the side where the first position and the second position are located; Preferably, along the length direction of the first bridging wire from the first position to the second position, the first bridging wire includes a first segment, a second segment, a third segment, and a fourth segment connected in sequence. The first segment extends from the first position in a direction away from the second bridging wire to a first inflection point. The second segment extends from the first inflection point in a direction close to the second bridging wire to a first midpoint. The third segment extends from the first midpoint in a direction away from the second bridging wire to the second inflection point. The fourth segment extends from the second inflection point in a direction close to the second bridging wire to the second position. Preferably, along the length direction of the second bridging wire from the third position to the fourth position, the second bridging wire includes a fifth segment, a sixth segment, a seventh segment, and an eighth segment connected in sequence. The fifth segment extends from the third position in a direction away from the first bridging wire to a third inflection point. The sixth segment extends from the third inflection point in a direction close to the first bridging wire to a second midpoint. The seventh segment extends from the second midpoint in a direction away from the first bridging wire to the fourth inflection point. The eighth segment extends from the fourth inflection point in a direction close to the first bridging wire to the fourth position. Preferably, both the first bridging wire and the second bridging wire are symmetrical with respect to the line connecting the first midpoint and the second midpoint.

3. The display panel according to claim 2, characterized in that, The third island portion and the fourth island portion are adjacent in the first direction, the first island portion and the third island portion are adjacent in the second direction, the second island portion and the fourth island portion are adjacent in the second direction, and the first direction intersects the second direction; Preferably, the third island portion has a fifth position and a seventh position, and the fourth island portion has a sixth position and an eighth position; The multiple bridge connections also include a third bridge connection and a fourth bridge connection located between the third island and the fourth island; The two ends of the third bridge connection are respectively connected to the circuit structures of the pixel circuit at the fifth position and the sixth position; the two ends of the fourth bridge connection are respectively connected to the circuit structures of the pixel circuit at the seventh position and the eighth position; the fifth and seventh positions are located on the side of the third island closer to the fourth island, and the sixth and eighth positions are located on the side of the fourth island closer to the third island; the fifth and sixth positions are both located on the third side of the centroid line connecting the third and fourth islands, and the third and fourth positions are both located on the fourth side of the centroid line opposite to the side where the fifth and sixth positions are located; Preferably, the bridging wire between the third island and the fourth island has the same structure as the bridging wire between the first island and the second island; Preferably, both the first bridging wire and the second bridging wire are curved. Preferably, the first island portion has a ninth position and an eleventh position, and the third island portion has a tenth position and a twelfth position; The multiple bridge connections also include a fifth bridge connection and a sixth bridge connection located between the first island and the third island; The two ends of the fifth bridge connection are respectively connected to the circuit structures of the pixel circuit at the ninth position and the tenth position; the two ends of the sixth bridge connection are respectively connected to the circuit structures of the pixel circuit at the eleventh position and the twelfth position; the ninth and eleventh positions are located on the side of the first island closer to the third island, and the tenth and twelfth positions are located on the side of the third island closer to the first island; the ninth and tenth positions are both located on the fifth side of the centroid line connecting the first island and the third island, and the eleventh and twelfth positions are both located on the sixth side of the centroid line opposite to the side where the ninth and tenth positions are located; Preferably, the distance between the third midpoint of the fifth bridge connection and the fourth midpoint of the sixth bridge connection is less than the distance between the ninth position and the eleventh position, and less than the distance between the tenth position and the twelfth position; Preferably, the fifth bridge connection includes multiple inflection points, including a fifth inflection point and a sixth inflection point. The fifth inflection point and the sixth inflection point are located on both sides of the third midpoint. The distance between the fifth inflection point and the third midpoint is greater than the distance between the ninth position and the third midpoint. The distance between the sixth inflection point and the third midpoint is greater than the distance between the tenth position and the third midpoint. Preferably, the sixth bridge connection includes multiple inflection points, including a seventh inflection point and an eighth inflection point. The seventh inflection point and the eighth inflection point are located on both sides of the fourth midpoint. The distance between the seventh inflection point and the fourth midpoint is greater than the distance between the eleventh position and the fourth midpoint. The distance between the eighth inflection point and the fourth midpoint is greater than the distance between the twelfth position and the fourth midpoint. Preferably, along the length direction of the fifth bridge connection from the ninth position to the tenth position, the fifth bridge connection includes a ninth segment, a tenth segment, an eleventh segment, and a twelfth segment connected in sequence. The ninth segment extends from the ninth position in a direction away from the sixth bridge connection to the fifth inflection point. The tenth segment extends from the fifth inflection point in a direction close to the sixth bridge connection to the third midpoint. The eleventh segment extends from the third midpoint in a direction away from the sixth bridge connection to the sixth inflection point. The twelfth segment extends from the sixth inflection point in a direction close to the sixth bridge connection to the tenth position. Preferably, along the length direction of the sixth bridge connection from the eleventh position to the twelfth position, the sixth bridge connection includes a thirteenth segment, a fourteenth segment, a fifteenth segment, and a sixteenth segment connected in sequence. The thirteenth segment extends from the eleventh position in a direction away from the fifth bridge connection to the seventh inflection point. The fourteenth segment extends from the seventh inflection point in a direction close to the fifth bridge connection to the fourth midpoint. The fifteenth segment extends from the fourth midpoint in a direction away from the fifth bridge connection to the eighth inflection point. The sixteenth segment extends from the eighth inflection point in a direction close to the fifth bridge connection to the twelfth position. Preferably, both the fifth bridge connection and the sixth bridge connection are symmetrical with respect to the line connecting the third midpoint and the fourth midpoint; Preferably, both the fifth bridge connection and the sixth bridge connection are curved. Preferably, the second island portion has a thirteenth position and a fifteenth position, and the fourth island portion has a fourteenth position and a sixteenth position; The multiple bridge connections also include a seventh bridge connection and an eighth bridge connection located between the second island and the fourth island; The two ends of the seventh bridge connection are respectively connected to the circuit structures of the pixel circuit at the thirteenth position and the fourteenth position; the two ends of the eighth bridge connection are respectively connected to the circuit structures of the pixel circuit at the fifteenth position and the sixteenth position; the thirteenth and fifteenth positions are located on the side of the second island closer to the fourth island, and the fourteenth and sixteenth positions are located on the side of the fourth island closer to the second island; the thirteenth and fourteenth positions are both located on the seventh side of the centroid line connecting the second island and the fourth island, and the fifteenth and sixteenth positions are both located on the eighth side of the centroid line opposite to the side where the thirteenth and fourteenth positions are located; Preferably, the bridging wire between the first island and the third island has the same structure as the bridging wire between the second island and the fourth island.

4. The display panel according to claim 3, characterized in that, The multiple islands are arranged along a first direction and a second direction, respectively, and the first direction intersects the second direction; The first island, the second island, the third island, and the fourth island are connected by four bridging lines, and the shape formed by the four bridging lines is centrally symmetrical. Preferably, the figure formed by the four bridging lines between the first island, the second island, the third island, and the fourth island is axially symmetrical; Preferably, the inflection points on both sides of the centroid connecting line between the first island and the fourth island are close to each other and extend towards the center of symmetry of the figure enclosed by the four bridging lines, and / or, the inflection points on both sides of the centroid connecting line between the second island and the third island are close to each other and extend towards the center of symmetry of the figure enclosed by the four bridging lines. Preferably, the angle between the inflection point of the bridging wire connected to the circuit structure of the pixel circuit of the first island and the center of symmetry, and the centroid line connecting the first island and the fourth island, is 20-25°, preferably 22.5°; and / or, the angle between the inflection point of the bridging wire connected to the circuit structure of the pixel circuit of the fourth island and the center of symmetry, and the centroid line connecting the first island and the fourth island, is 20-25°, preferably 22.5°; and / or, the angle between the inflection point of the bridging wire connected to the circuit structure of the pixel circuit of the second island and the center of symmetry, and the centroid line connecting the second island and the third island, is 20-25°, preferably 22.5°; and / or, the angle between the inflection point of the bridging wire connected to the circuit structure of the pixel circuit of the third island and the center of symmetry, and the centroid line connecting the second island and the third island, is 20-25°, preferably 22.5°.

5. The display panel according to claim 1, characterized in that, The substrate further includes: a plurality of bridge portions, the bridge portions connecting adjacent island portions, the bridge wires located on the bridge portions, and the bridge portions and the bridge wires extending in the same direction; Preferably, a sub-pixel is located in one of the island portions, and the first bridging wire and the second bridging wire are respectively located in one of the bridge portions; Preferably, the plurality of bridge portions include a first bridge portion and a second bridge portion, the first bridge portion includes a first groove and the first bridge wire is located in the first groove, the second bridge portion includes a second groove and the second bridge wire is located in the second groove; Preferably, the first bridge portion and the second bridge portion corresponding to the first midpoint and the second midpoint are connected as a single unit; Preferably, the substrate comprises a flexible substrate.

6. The display panel according to claim 1, characterized in that, The island portion includes a central region and an edge region surrounding the central region. The sub-pixel is located in the central region, and the thickness of the edge region gradually decreases in a direction that gradually moves away from the central region. Preferably, the longitudinal section of the edge region has an arc shape on the side closest to the sub-pixel; Preferably, the display panel further includes: a plurality of bridge portions, the bridge portions connecting adjacent island portions, the bridge wires located on the bridge portions, and the bridge portions and the bridge wires extending in the same direction; the bridge portion includes a connecting area and a main body area, the connecting area is connected to the island portion, and the thickness of the connecting area gradually decreases in the direction from the main body area to the connecting area; Preferably, the longitudinal section of the connection area is arc-shaped on the side closest to the bridging wire.

7. The display panel according to claim 1, characterized in that, The island has multiple recessed edges, with the first, second, third, and fourth positions each located at a recessed edge. Preferably, the island portion includes a central region and an edge region surrounding the central region, with the recessed edge located in the edge region; Preferably, the edge region extending from the recessed edge toward the central region includes a first notch or a first opening; Preferably, the first notch and / or the first opening extends through the edge region along the thickness direction of the substrate.

8. The display panel according to claim 5, characterized in that, The bridge portion includes multiple turning sub-ports, and each turning sub-port includes a second notch or a second opening; Preferably, the second notch and / or the second opening penetrates the turning sub-section along the thickness direction of the bridge portion; Preferably, the first bridge connection includes a first inflection point and a second inflection point, wherein the first inflection point, the second inflection point and the first midpoint are respectively located in a turning sub-section; Preferably, the second bridge connection includes a third inflection point and a fourth inflection point, wherein the third inflection point, the fourth inflection point and the second midpoint are respectively located in one of the turning sub-sections.

9. A display panel, characterized in that, include: A substrate includes multiple islands, each island comprising a central region and an edge region surrounding the central region; the thickness of the edge regions gradually decreases in a direction gradually moving away from the central region. Multiple sub-pixels are located on their respective island portions, and the sub-pixels are located in the central region; Multiple pixel circuits are located on the corresponding island portions, and are used to drive the corresponding sub-pixels; as well as Multiple bridging wires are located between adjacent island sections, and the two ends of each bridging wire are respectively connected to the circuit structure of the pixel circuit of the two adjacent island sections.

10. The display panel according to claim 9, characterized in that, The island portion has multiple edge recesses, the edges of which are located in the edge region, and the edge region extending from the edge of the recessed edge toward the central region includes a first notch or a first opening. Preferably, the first notch and / or the first opening extends through the edge region along the thickness direction of the substrate.

11. A method for manufacturing a display panel, characterized in that, include: Multiple pixel circuits are fabricated on one side of the substrate; The substrate is subjected to a first patterning process to obtain multiple grooves; Multiple bridging wires are fabricated in the groove; The substrate is subjected to a second patterning process to obtain a substrate including multiple bridge portions and multiple island portions, thereby obtaining the display panel; Multiple island portions form multiple island groups, and the island groups include a first island portion, a second island portion, a third island portion, and a fourth island portion arranged in a quadrilateral shape. The first island portion and the second island portion are adjacent in a first direction. The first island portion has a first position and a third position, and the second island portion has a second position and a fourth position. The multiple bridging wires include a first bridging wire and a second bridging wire located between the first island and the second island; wherein, the two ends of the first bridging wire are respectively connected to the circuit structure of the pixel circuit at the first position and the circuit structure of the pixel circuit at the second position, and the two ends of the second bridging wire are respectively connected to the circuit structure of the pixel circuit at the third position and the circuit structure of the pixel circuit at the fourth position; the distance between the first midpoint of the first bridging wire and the second midpoint of the second bridging wire is less than the distance between the first position and the third position, and less than the distance between the second position and the fourth position; the first bridging wire includes multiple inflection points, the multiple inflection points including a first inflection point and a second inflection point, the first inflection point and the second inflection point being located on both sides of the first midpoint, the distance between the first inflection point and the first midpoint being greater than the distance between the first position and the first midpoint, and the distance between the second inflection point and the first midpoint being greater than the distance between the second position and the first midpoint.

12. The preparation method according to claim 11, characterized in that, The second patterning process for the substrate includes: A photomask is placed on one side of a substrate, and the orthographic projection of the photomask onto the substrate covers the bridging wires and the pixel circuit. The mask and the substrate are etched simultaneously to obtain the island, which includes a central region and an edge region surrounding the central region. The thickness of the edge region gradually decreases in the direction that moves away from the central region. Preferably, the etching process of the photomask and the substrate includes: etching the photomask and the substrate using a dry etching method; Preferably, the photomask comprises photoresist.

13. A display device, characterized in that, The display panel includes any one of claims 1-10, or the display panel prepared by the preparation method according to claim 11 or 12.

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