Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a flexible substrate, pixel islands, stretchable wires and a springback structure. The rebound structures are further arranged between the pixel islands, the yield strength of the rebound structures is larger than that of the stretchable wires, after the display panel is stretched by external force, the rebound structures and the stretchable wires are stretched together, and after the external force disappears, the rebound structures with the large yield strength can recover to the original shape more easily. Therefore, the stretching recovery capability and the recovery rate of the display panel are improved. The springback structures and the stretchable wires are jointly arranged between the pixel islands, when the display panel is stretched, the springback structures and the stretchable wires can share stress and reduce the stress of the stretchable wires and the springback structures, so that the overall bearable external force of the display panel is improved, the display panel has high stretching rate, and the display effect is improved. And the stretchable routing and the rebound structure with small stress can recover to the original shape more easily, and the recovery rate is high, so that the use performance of the display panel is improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. Summary of the invention

[0004] Embodiments of the present application provide a display panel and a display device, aiming to improve the performance of the display panel.

[0005] A first aspect of the present application provides a display panel, comprising: a flexible substrate; a pixel island located on one side of the flexible substrate, wherein a plurality of pixel islands are arranged at intervals; a stretchable trace located on one side of the flexible substrate and connected between adjacent pixel islands; and a rebound structure located on one side of the flexible substrate and connected between adjacent pixel islands, wherein the yield strength of the rebound structure is greater than the yield strength of the stretchable trace.

[0006] According to an implementation of the first aspect of the present application, a ratio of the yield strength of the rebound structure to the yield strength of the stretchable wiring is 1.5-10.

[0007] According to any of the aforementioned embodiments of the first aspect of the present application, the plurality of pixel islands are distributed in an array.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, the yield strength of the rebound structure is 30% to 150%.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the rebound structure extends along a straight path.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the stretchable routing line extends along a curved path.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the stretchable routing has a curved segment, the curved segment includes two segments connected to each other, each segment includes a first curved segment and a second curved segment connected in sequence, and the first curved segment is located between the pixel island and the second curved segment.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the curved segment also includes a second straight segment connected to the second curved segment, the second straight segment is located on a side of the second curved segment away from the first curved segment, and the second straight segments of two adjacent segments are connected to each other.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, at least two stretchable traces are arranged between adjacent pixel islands.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, two stretchable traces connecting the same two pixel islands are disposed on both sides of the rebound structure.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the protruding directions of the curved sections of the two stretchable traces connecting the same two pixel islands are opposite.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, two stretchable traces connecting the same two pixel islands are symmetrically arranged with respect to the rebound structure.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, the stretchable wiring further has first straight line segments located on both sides of the curved segment, and the stretchable wiring is connected to the pixel island through the first straight line segments.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, two segments of the same stretchable trace are symmetrically arranged about the first reference line, and the side-by-side arrangement directions of the two pixel islands connected by the first reference line and the curved segment intersect.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, the second straight line segments of the same stretchable trace are symmetrical about the first reference line axis.

[0020] According to any of the aforementioned embodiments of the first aspect of the present application, the protruding directions of the first curved segment and the second curved segment are opposite.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, the stretchable routing has a first curved segment and a second curved segment connected in sequence, the first curved segment is located between the pixel island and the second curved segment, the first curved segment includes a first segment and a second segment, the first segment is located between the pixel island and the second segment, the second segment is connected between the first segment and the second curved segment, and the curvature radius of the first segment is greater than the curvature radius of the second segment.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the first segment is greater than or equal to 4 times the radius of curvature of the second segment.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the first segment is greater than or equal to 130 μm.

[0024] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the second segment is greater than or equal to 30 μm.

[0025] According to any of the aforementioned embodiments of the first aspect of the present application, the second curved segment includes a third segment and a fourth segment, the third segment is connected between the first curved segment and the fourth segment, the fourth segment is located between the third segment and the adjacent segment, and the curvature radii of the third segment and the fourth segment are the same or different.

[0026] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the third segment is greater than or equal to 1.5 times the radius of curvature of the second segment.

[0027] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the fourth segment is greater than or equal to 1.5 times the radius of curvature of the second segment.

[0028] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the first segment is greater than or equal to 3 times the radius of curvature of the third segment.

[0029] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the first segment is greater than or equal to 3 times the radius of curvature of the fourth segment.

[0030] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the third segment is greater than or equal to 45 μm.

[0031] According to any of the aforementioned embodiments of the first aspect of the present application, the radius of curvature of the fourth segment is greater than or equal to 45 μm.

[0032] According to any of the aforementioned embodiments of the first aspect of the present application, along a cross section perpendicular to the extension direction of the stretchable wiring, the cross section of the stretchable wiring has two oppositely arranged first edges and two oppositely arranged second edges, the second edges are parallel to the flexible substrate, the size of the first edge is a, the size of the second edge is b, and a and b satisfy: a≤b≤4a.

[0033] According to any of the aforementioned embodiments of the first aspect of the present application, a and b satisfy: b=8 / 6a.

[0034] According to any of the aforementioned implementations of the first aspect of the present application, the display panel further includes: a protective layer located on one side of the flexible substrate, and the stretchable trace is arranged in the protective layer.

[0035] According to any of the aforementioned embodiments of the first aspect of the present application, a plurality of stretchable traces are arranged at intervals in the thickness direction of the display panel.

[0036] According to any of the aforementioned embodiments of the first aspect of the present application, a protective layer is provided between a plurality of stretchable traces spaced apart in the thickness direction.

[0037] According to any of the aforementioned embodiments of the first aspect of the present application, the orthographic projections of a plurality of stretchable traces spaced apart in the thickness direction overlap on the flexible substrate.

[0038] An embodiment of a second aspect of the present application provides a display device, which includes a display panel according to any of the above embodiments.

[0039] According to an embodiment of the present application, a display panel is provided, and the display panel includes a flexible substrate, a pixel island, a stretchable routing and a rebound structure. A stretchable routing is arranged between the pixel islands. When the display panel is stretched, the stretchable routing can be stretched accordingly, reducing the possibility of the routing between the pixel islands being broken due to the stretching of the display panel, thereby improving the stretching rate of the display panel. A rebound structure is also arranged between the pixel islands, and the yield strength of the rebound structure is greater than the yield strength of the stretchable routing. When the display panel is stretched by an external force, the rebound structure and the stretchable routing are stretched together. When the external force disappears, the rebound structure with a larger yield strength is easier to restore to its original state, thereby improving the stretching recovery ability and recovery rate of the display panel. The rebound structure and the stretchable routing are arranged together between the pixel islands. When the display panel is stretched, the rebound structure and the stretchable routing can share the stress, reduce the stress of the stretchable routing and the rebound structure, so that the overall external force that the display panel can withstand is improved, and has a higher stretching rate, and the stretchable routing and the rebound structure with less stress are easier to restore to their original state, and have a higher recovery rate, thereby improving the use performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0041] Figure 1 is a schematic top view of a display panel before stretching provided by an embodiment of the first aspect of the present application;

[0042] Figure 2 yes Figure 1 A partial enlarged view of

[0043] Figure 3 is a schematic top view of a stretched display panel provided by another embodiment;

[0044] Figure 4 yes Figure 3 A partial enlarged view of

[0045] Figure 5 Another embodiment provides Figure 1 A partial enlarged view of

[0046] Figure 6 Yet another embodiment provides Figure 1 A partial enlarged view of

[0047] Figure 7 Yet another embodiment provides Figure 1 A partial enlarged view of

[0048] Figure 8 Another embodiment provides Figure 1 A partial enlarged view of

[0049] Fig. 9 Still another embodiment provides Figure 1 A partial enlarged view of

[0050] Fig.10 is a simulation schematic diagram of a display panel of the prior art;

[0051] Fig.11 This is a simulation schematic diagram of a display panel with a stretching rate of 10% provided by an embodiment of the first aspect of the present application;

[0052] Fig.12 This is a simulation schematic diagram of a display panel with a stretch rate of 50% provided in an embodiment of the first aspect of the present application;

[0053] Fig.13 is a partial cross-sectional view of a display panel provided by an embodiment of the first aspect of the present application;

[0054] Fig.14 is a partial cross-sectional view of a display panel provided by another embodiment;

[0055] Fig.15 is a partial cross-sectional view of a display panel provided by yet another embodiment.

[0056] Description of reference numerals:

[0057] 10. display panel; 11. first reference surface;

[0058] 100. Flexible substrate;

[0059] 200, Pixel Island;

[0060] 300, stretchable routing; 301, segment; 310, curved segment; 311, first curved segment; 312, second curved segment; 313, second straight segment; 314, first segment; 315, second segment; 316, third segment; 317, fourth segment; 320, first straight segment; 330, first edge; 340, second edge;

[0061] 400, rebound structure;

[0062] 500. Protective layer. DETAILED DESCRIPTION

[0063] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0066] Stretchable display brings users a new visual and usage experience due to its innovative morphology. The research and application of related devices have attracted widespread attention.

[0067] Among them, the stretchable display panel adopts the structuring of pixel islands and connecting bridges, as well as stretchable substrate materials, etc. After long-term research, the inventors found that the stretchability of the stretchable display panel is limited during the stretching process due to the influence of the display panel structure and the limitations of material properties.

[0068] In order to solve the above problems, embodiments of the present application provide a display panel and a display device. Embodiments of the display panel and the display device will be described below in conjunction with the accompanying drawings.

[0069] An embodiment of the present application provides a display panel, which may be an organic light emitting diode (OLED) display panel.

[0070] Please also read Figures 1 to 4 , Figure 1 is a schematic top view of a display panel before stretching provided by an embodiment of the first aspect of the present application; Figure 2 yes Figure 1 A partial enlarged view of Figure 3 is a schematic top view of a stretched display panel provided by another embodiment; Figure 4 yes Figure 3 A partial enlarged view of .

[0071] like Figures 1 to 4 As shown, the first embodiment of the present application provides a display panel 10, which includes a flexible substrate 100, a pixel island 200, a stretchable wiring 300 and a rebound structure 400; the pixel island 200 is located on one side of the flexible substrate 100, and a plurality of pixel islands 200 are arranged at intervals; the stretchable wiring 300 is located on one side of the flexible substrate 100 and connected between adjacent pixel islands 200; the rebound structure 400 is located on one side of the flexible substrate 100 and connected between adjacent pixel islands 200, and the yield strength of the rebound structure 400 is greater than the yield strength of the stretchable wiring 300.

[0072] According to an embodiment of the present application, a display panel 10 is provided, and the display panel 10 includes a flexible substrate 100, a pixel island 200, a stretchable wiring 300, and a resilient structure 400. The stretchable wiring 300 is arranged between the pixel islands 200. When the display panel 10 is stretched, the stretchable wiring 300 can be stretched accordingly, thereby reducing the possibility of the wiring between the pixel islands 200 being broken due to the stretching of the display panel 10, thereby improving the stretching rate of the display panel 10. The resilient structure 400 is also arranged between the pixel islands 200, and the yield strength of the resilient structure 400 is greater than the yield strength of the stretchable wiring 300. When the display panel 10 is stretched by an external force, the resilient structure 400 and the stretchable wiring 300 are stretched together. When the external force disappears, the resilient structure 400 with a larger yield strength is more likely to return to its original state, thereby improving the stretching recovery ability and recovery rate of the display panel 10. The rebound structure 400 and the stretchable structure are jointly arranged between the pixel islands 200. When the display panel 10 is stretched, the rebound structure 400 and the stretchable wiring 300 can share the stress and reduce the stress of the stretchable wiring 300 and the rebound structure 400, so that the overall external force resistance of the display panel 10 is improved and it has a higher stretching rate. The stretchable wiring 300 and the rebound structure 400 with smaller stress are easier to return to their original state and have a higher recovery rate, thereby improving the performance of the display panel 10.

[0073] After the rebound structure 400 is provided, the stiffness of the rebound structure 400 is adjusted. For example, when the stiffness of the rebound structure 400 is relatively large, a relatively large external force is required to stretch the display panel 10, so that the display panel 10 has a certain stretching perception.

[0074] Optionally, a plurality of pixel islands 200 are distributed in an array to improve display uniformity.

[0075] Optionally, the material of the flexible substrate 100 includes polydimethylsiloxane (PDMS), polyurethane (PU), acrylic acid or other polymer films.

[0076] The arrangement of the pixel island 200 is not limited herein. The pixel island 200 may include a TFT device layer and an OLED device layer sequentially arranged on the flexible substrate 100, or the pixel island 200 may include a planarization layer and an OLED device layer arranged on the TFT device layer.

[0077] The material of the stretchable trace 300 includes a conductive material to achieve electrical connection between adjacent pixel islands 200 .

[0078] In these optional embodiments, the ratio of the yield strength of the resilient structure 400 to the yield strength of the stretchable trace 300 is 1.5-10.

[0079] In these optional embodiments, the yield strength ratio of the rebound structure 400 to the yield strength of the stretchable wiring 300 is greater than or equal to 1.5, so as to avoid the problem that the yield strength of the rebound structure 400 is too small, resulting in the rebound structure 400 being stretched beyond the yield limit after the display panel 10 achieves a high stretch rate, thereby causing plastic deformation and difficulty in restoring the original state. The yield strength ratio of the rebound structure 400 to the yield strength of the stretchable wiring 300 is less than or equal to 10, so as to avoid the problem that the yield strength of the rebound structure 400 is too large, resulting in the problem that the material of the rebound structure 400 is difficult to obtain or the material cost is high, and it can also avoid the problem that the yield strength of the stretchable wiring 300 is too small, resulting in the problem that the stretchable wiring 300 is stretched beyond the yield limit after the display panel 10 achieves a high stretch rate, thereby causing plastic deformation and difficulty in restoring the original state.

[0080] In some optional embodiments, the yield strength of the resilient structure 400 is 30% to 150%.

[0081] In these optional embodiments, the yield strength of the resilient structure 400 is greater than or equal to 30%, so as to avoid the problem that the yield strength of the resilient structure 400 is too small, resulting in the problem that after the display panel 10 achieves a high stretch rate, the resilient structure 400 is stretched beyond the yield limit, thereby undergoing plastic deformation and being difficult to restore to its original state. The yield strength of the resilient structure 400 is less than or equal to 150%, so as to avoid the problem that the yield strength of the resilient structure 400 is too large, resulting in the problem that the material of the resilient structure 400 is difficult to obtain or the material cost is high.

[0082] like Figure 2 As shown, optionally, the resilient structure 400 extends along a linear path.

[0083] Optionally, the stretchable trace 300 extends along a curved path.

[0084] In these optional embodiments, when the rebound structure 400 and the stretchable wiring 300 are both located between adjacent pixel islands 200, the extension length of the rebound structure 400 extending along a straight path is shorter than that of the stretchable wiring 300 extending along a curved path. When the display panel 10 is stretched, the rebound structure 400 is more likely to undergo elastic deformation, so that the stress on the rebound structure 400 is greater than the stress on the stretchable wiring 300. Therefore, the rebound structure 400 can have a greater rebound force. When the external force disappears, the rebound structure 400 is more likely to rebound, thereby improving the recovery rate of the display panel 10.

[0085] Please also read Figure 2 and Figure 5 , Figure 5 Another embodiment provides Figure 1 The dotted lines in the figure are for reference only and are not actual structural features.

[0086] like Figure 2 and Figure 5 As shown, in some optional embodiments, the stretchable routing 300 has a curved section 310, and the curved section 310 includes two segments 301 connected to each other. Each segment 301 includes a first curved section 311 and a second curved section 312 connected in sequence. The first curved section 311 is located between the pixel island 200 and the second curved section 312.

[0087] In these optional embodiments, the first curved segment 311 and the second curved segment 312 allow the stretchable wiring 300 to extend along a curved path, thereby increasing the stretching rate of the display panel 10. Furthermore, the provision of the first curved segment 311 and the second curved segment 312 can reduce the stress on the stretchable wiring 300 when the display panel 10 is stretched, thereby further increasing the stretching rate of the display panel 10.

[0088] See also Figure 6 , Figure 6 Yet another embodiment provides Figure 1 The dotted lines in the figure are for reference only and are not actual structural features.

[0089] like Figure 6 As shown, in some optional embodiments, the curved segment 310 includes a second straight segment 313 connected to the second curved segment 312, the second straight segment 313 is located on the side of the second curved segment 312 away from the first curved segment 311, and the second straight segments 313 of two adjacent segments 301 are connected to each other.

[0090] In these optional embodiments, the first curved segment 311 is connected between the first straight segment 320 and the second curved segment 312 to achieve a transition from the first straight segment 320 to the second curved segment 312. The provision of the second straight segment 313 can reduce stress concentration at the connection position of adjacent segments 301, and reduce the risk of the second straight segment 313 breaking when the display panel 10 is stretched.

[0091] See also Figure 7 , Figure 7 Yet another embodiment provides Figure 1 A partial enlarged view of .

[0092] like Figure 7 As shown, in some optional embodiments, the stretchable wiring 300 further has a first straight segment 320 located on both sides of the curved segment 310 , and the stretchable wiring 300 is connected to the pixel island 200 via the first straight segment 320 .

[0093] In these optional embodiments, when the display panel 10 is stretched along the extension direction of the first straight line segment 320, the first straight line segment 320 is stretched and lengthened, and the curved segment 310 has a tendency to straighten. Therefore, the stress on the curved segment 310 is smaller, and the curved segment 310 changes from curved to straight. After the curved segment 310 becomes straight, it can be stretched and lengthened further, so that the stretchable wiring 300 has a higher stretch rate, thereby improving the overall stretch rate of the display panel 10.

[0094] like Figure 2 As shown, optionally, at least two stretchable wirings 300 are arranged between adjacent pixel islands 200, and the two stretchable wirings 300 can realize electrical connection between the two pixel islands 200, and the two stretchable wirings 300 can further share the stress, reduce the stress of the stretchable wirings 300 and the rebound structure 400, so that the overall external force tolerance of the display panel 10 is improved, and it has a higher stretching rate, and the stretchable wirings 300 and the rebound structure 400 with smaller stress are easier to return to their original state and have a higher recovery rate, thereby improving the performance of the display panel 10.

[0095] Optionally, two stretchable traces 300 connecting the same two pixel islands 200 are arranged on both sides of the rebound structure 400, so that the stress distribution of the film layer on both sides of the rebound structure 400 is more uniform, thereby improving the uniformity of the overall stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10.

[0096] Optionally, the curved sections 310 of the two stretchable traces 300 connecting the same two pixel islands 200 protrude in opposite directions, further making the stress distribution of the film layer on both sides of the rebound structure 400 more uniform, thereby improving the uniformity of the overall stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10.

[0097] Optionally, two stretchable traces 300 connecting the same two pixel islands 200 are symmetrically arranged about the rebound structure 400, so that the film layer stress on both sides of the rebound structure 400 is symmetrically distributed, further improving the uniformity of the overall stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10.

[0098] like Figure 6 As shown, optionally, two segments 301 of the same stretchable trace 300 are symmetrically arranged about the first reference line 11, and the side-by-side arrangement directions of the two pixel islands 200 connected by the first reference line 11 and the curved segment 310 intersect, so that the film layer stress of the two segments 301 is symmetrically distributed, further improving the uniformity of the overall stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10. Figure 6 The first reference line 11 in FIG. 1 is only used to illustrate the positional relationship of the structures on both sides of the first reference line 11 , and is not an actual structural feature.

[0099] The intersection of the parallel arrangement directions of the two pixel islands 200 means that, in two adjacent pixel islands 200 , the direction in which one points toward the other is the parallel arrangement direction of the two pixel islands 200 .

[0100] The first reference line 11 intersects with the parallel arrangement direction of the two pixel islands 200 connected by the curved segment 310. For example, the first reference line 11 is perpendicular to the parallel arrangement direction of the two pixel islands 200 and the first reference line 11 is parallel to the flexible substrate 100. The first reference line 11 is a virtual straight line, not an actual physical structure.

[0101] Optionally, the second straight line segment 313 of the same stretchable trace 300 is axially symmetrical about the first reference line 11, so that the film layer stress of the two second straight line segments 313 is symmetrically distributed, further improving the uniformity of the overall stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10.

[0102] Optionally, the protruding directions of the first curved segment 311 and the second curved segment 312 are opposite, so that the first straight segment 320 transitions to the curve of the second curved segment 312, avoiding the first curved segment 311 and the second curved segment 312 from protruding in the same direction, resulting in a large turning point at the adjacent position of the first straight segment 320 and the curved segment 310, causing stress concentration at the adjacent position of the first straight segment 320 and the curved segment 310, and the problem of wiring breakage is prone to occur when the display panel 10 is stretched.

[0103] See also Figure 8 , Figure 8 Still another embodiment provides Figure 1 The dotted lines in the figure are for reference only and are not actual structural features.

[0104] like Figure 8 As shown, in some optional embodiments, the stretchable routing has a first curved segment 311 and a second curved segment 312 connected in sequence, the first curved segment 311 is located between the pixel island 200 and the second curved segment 312, the first curved segment 311 includes a first segment 314 and a second segment 315, the first segment 314 is located between the pixel island 200 and the second segment 315, the second segment 315 is connected between the first segment 314 and the second curved segment 312, and the curvature radius of the first segment 314 is greater than the curvature radius of the second segment 315.

[0105] In these optional embodiments, the first segment 314 has a larger curvature, thereby achieving a smooth transition from the first straight segment 320 to the second segment 315 with a smaller curvature, and avoiding the situation where the curvature of the first segment 314 is smaller, resulting in a larger transition position between the first straight segment 320 and the second segment 315, causing stress concentration in the first segment 314, and easily causing wiring breakage when the display panel 10 is stretched.

[0106] Optionally, the radius of curvature of the first segment 314 is greater than or equal to 4 times the radius of curvature of the second segment 315 , which can avoid the problem of the first segment 314 having a too small radius of curvature, resulting in stress concentration in the first segment 314 and prone to wiring breakage when the display panel 10 is stretched.

[0107] Optionally, the radius of curvature of the first segment 314 is greater than or equal to 130 μm to avoid the problem that the radius of curvature of the first segment 314 is too small, which causes stress concentration in the first segment 314 and easily causes wiring breakage when the display panel 10 is stretched.

[0108] Optionally, the radius of curvature of the second segment 315 is greater than or equal to 30 μm to avoid the problem that the radius of curvature of the second segment 315 is too small, which causes stress concentration in the second segment 315 and easily causes wiring breakage when the display panel 10 is stretched.

[0109] See also Fig. 9 , Fig. 9 Still another embodiment provides Figure 1 The dotted lines in the figure are for reference only and are not actual structural features.

[0110] like Fig. 9 As shown, in some optional embodiments, the second curved segment 312 includes a third segment 316 and a fourth segment 317, the third segment 316 is connected between the first curved segment 311 and the fourth segment 317, the fourth segment 317 is located between the third segment 316 and the adjacent segment 301, and the curvature radii of the third segment 316 and the fourth segment 317 are the same or different.

[0111] In these optional embodiments, when the third segment 316 and the fourth segment 317 have the same radius of curvature, the stress distribution of the film layers of the third segment 316 and the fourth segment 317 is uniform, further improving the uniformity of the overall stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10. The third segment 316 and the fourth segment 317 have different radii, for example, the radius of curvature of the fourth segment 317 is larger than the radius of curvature of the third segment 316, so that the third segment 316 smoothly transitions to the second straight segment 313, avoiding the fourth segment 317 having a smaller curvature, resulting in a larger transition position between the second straight segment 313 and the third segment 316, causing stress concentration in the fourth segment 317, and the problem of wiring breakage is prone to occur when the display panel 10 is stretched.

[0112] Optionally, the radius of curvature of the third segment 316 is greater than or equal to 1.5 times the radius of curvature of the second segment 315 to avoid the radius of curvature of the third segment 316 being too small, which would lead to stress concentration in the third segment 316 and easily cause wiring breakage when the display panel 10 is stretched.

[0113] Optionally, the radius of curvature of the fourth segment 317 is greater than or equal to 1.5 times the radius of curvature of the second segment 315 to avoid the curvature radius of the fourth segment 317 being too small, which would lead to stress concentration in the fourth segment 317 and easily cause wiring breakage when the display panel 10 is stretched.

[0114] Optionally, the radius of curvature of the first segment 314 is greater than or equal to three times the radius of curvature of the third segment 316 , which can avoid the problem of the first segment 314 having a too small radius of curvature, resulting in stress concentration in the first segment 314 and prone to wiring breakage when the display panel 10 is stretched.

[0115] Optionally, the radius of curvature of the first segment 314 is greater than or equal to three times the radius of curvature of the fourth segment 317 , which can avoid the problem of the radius of curvature of the first segment 314 being too small, resulting in stress concentration in the first segment 314 and prone to wiring breakage when the display panel 10 is stretched.

[0116] Optionally, the radius of curvature of the third segment 316 is greater than or equal to 45 μm to avoid the problem that the radius of curvature of the third segment 316 is too small, which causes stress concentration in the third segment 316 and easily causes wiring breakage when the display panel 10 is stretched.

[0117] Optionally, the radius of curvature of the fourth segment 317 is greater than or equal to 45 μm to avoid the problem that the radius of curvature of the fourth segment 317 is too small, which causes stress concentration in the fourth segment 317 and easily causes wiring breakage when the display panel 10 is stretched.

[0118] Optionally, the radius of curvature of the first segment 314 is greater than or equal to 130 μm, the radius of curvature of the second segment 315 is greater than or equal to 30 μm, the radius of curvature of the third segment 316 is greater than or equal to 45 μm, and the radius of curvature of the fourth segment 317 is greater than or equal to 45 μm, so that the stretching rate of the display panel 10 can be increased by at least 2 times, and the stretching rate of the display panel 10 can reach 50%.

[0119] Please also read Figures 10 to 12 , Fig.10 is a simulation schematic diagram of a display panel of the prior art; Fig.11 This is a simulation schematic diagram of a display panel with a stretching rate of 10% provided by an embodiment of the first aspect of the present application; Fig.12 It is a simulation schematic diagram of a display panel with a stretching rate of 50% provided in the first aspect embodiment of the present application.

[0120] When the stretching rate of the display panel 10 is 10%, Fig.10 As shown, the stress value of the stretchable wiring 300 in the prior art is 1547Mpa. Fig.11 As shown, the stress value of the stretchable wiring 300 in this application is 224Mpa; Fig.12 As shown, when the stretch rate of the display panel 10 is 50%, the stress value of the stretchable wiring 300 in the present application is 1343Mp, which is still smaller than the stress value of the stretchable wiring 300 in the prior art when the stretch rate of the display panel is 10%. This indicates that in the display surface 10 provided by the present application, the rebound structure 400 and the stretchable wiring 300 can share the stress and reduce the stress of the stretchable wiring 300 and the rebound structure 400, so that the overall external force resistance of the display panel 10 is improved and the display panel 10 has a higher stretch rate.

[0121] See also Fig.13 , Fig.13 It is a partial cross-sectional view of a display panel provided in an embodiment of the first aspect of the present application.

[0122] like Fig.13As shown, in some optional embodiments, along a cross section perpendicular to the extension direction of the stretchable wiring 300, the cross section of the stretchable wiring 300 has two oppositely arranged first edges 330 and two oppositely arranged second edges 340, the second edges 340 are parallel to the flexible substrate 100, the size of the first edge 330 is a, the size of the second edge 340 is b, and a and b satisfy: a≤b≤4a.

[0123] In these optional embodiments, a≤b, i.e., the size of the second side 340 is greater than or equal to the size of the first side 330, and the size of the second side 340 is prevented from being smaller than the size of the first side 330, i.e., the size of the second side 340 is too small, resulting in a low structural strength of the stretchable wiring 300, and the stretchable wiring 300 is prone to break when the display panel 10 is stretched, or the size of the first side 330 is prevented from being too large, resulting in a reduced ductility of the stretchable wiring 300 along a plane parallel to the flexible substrate 100, thereby reducing the overall stretchability of the display panel 10. b≤4a, and the size of the second side 340 is prevented from being too large, resulting in an increase in the coverage area of ​​the stretchable wiring 300, and the wiring of the stretchable wiring 300 is more difficult in a limited wiring space, or the size of the first side 330 is prevented from being too small, resulting in a low structural strength of the stretchable wiring 300, and the stretchable wiring 300 is prone to break when the display panel 10 is stretched.

[0124] Optionally, a and b satisfy: b=8 / 6a. Under this condition, the stretchable wiring 300 can have both good ductility and structural strength, thereby improving the stretching effect of the display panel 10.

[0125] In some optional embodiments, the display panel 10 further includes a protective layer 500 , the protective layer 500 is located on one side of the flexible substrate 100 , and the stretchable trace 300 is disposed in the protective layer 500 .

[0126] In these optional embodiments, the stretchable wiring 300 is embedded in the protective layer 500, and the protective layer 500 wraps and protects the stretchable wiring 300, which can reduce the damage to the stretchable wiring 300 caused by impact and reduce the corrosion of the stretchable wiring 300 caused by water and oxygen intrusion, thereby improving the service life of the stretchable wiring 300.

[0127] Optionally, the flexible substrate 100 includes a supporting layer, and the protective layer 300 is disposed on the supporting layer, and the supporting layer supports the protective layer 500 .

[0128] Please also read Fig.14 and Fig.15 As shown, Fig.14 is a partial cross-sectional view of a display panel provided by another embodiment; Fig.15 is a partial cross-sectional view of a display panel provided by yet another embodiment.

[0129] like Fig.14 and Fig.15 As shown, optionally, a plurality of stretchable traces 300 are spaced apart in the thickness direction of the display panel 10. When multiple film layer electrical connections are required between adjacent pixel islands 200, a plurality of stretchable traces 300 along the thickness direction can be used to electrically connect each film layer.

[0130] In some optional embodiments, a protective layer 500 is provided between a plurality of stretchable traces 300 spaced apart in the thickness direction.

[0131] In these optional embodiments, a protective layer 500 is provided between the multiple stretchable wirings 300 in the thickness direction, which can isolate and insulate each stretchable wiring 300 to prevent short circuit caused by contact between the multiple stretchable wirings 300, and can also prevent water and oxygen from extending between the stretchable wirings 300, thereby improving the service life of the stretchable wiring 300.

[0132] In some optional embodiments, the orthographic projections of the plurality of stretchable traces 300 spaced apart in the thickness direction on the flexible substrate 100 overlap.

[0133] In these optional embodiments, the orthographic projections of the plurality of stretchable traces 300 on the flexible substrate 100 overlap, that is, the cross-sectional dimensions of the plurality of stretchable traces 300 are the same, so that the stress distributions of the plurality of stretchable traces 300 spaced apart along the thickness direction are similar or the same, thereby improving the uniformity of the stress distribution of the display panel 10, thereby improving the stretching effect of the display panel 10. Moreover, the arrangement of the multi-layer stretchable traces 300 can also reduce the stress of each stretchable trace and improve the stretching rate of the stretchable trace.

[0134] The structural design in this embodiment can be applied to other display panels 10 , and the specific selection can be made according to actual conditions, and this application does not impose any specific restrictions on it.

[0135] The second embodiment of the present invention further provides a display device, comprising the display panel 10 described in any of the first embodiments. Since the display device of the present invention comprises the display panel 10 of any of the first embodiments, the display device of the present invention has the beneficial effects of the display panel 10 of any of the first embodiments, which will not be described in detail here.

[0136] The display device may be a computer, a mobile phone, etc., which is not limited here. As long as the display device includes the display panel of any of the above embodiments, it will be fine.

[0137] The display device in the embodiment of the present invention includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart fixed-line phones, consoles and other devices with display functions.

[0138] According to the embodiments described above, these embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized in that: The display panel comprises: Flexible substrate; A pixel island is located on one side of the flexible substrate, and a plurality of the pixel islands are arranged at intervals; A stretchable wiring is located on one side of the flexible substrate and connected between adjacent pixel islands; The rebound structure is located on one side of the flexible substrate and connected between adjacent pixel islands, and the yield strength of the rebound structure is greater than the yield strength of the stretchable wiring.

2. The display panel according to claim 1, characterized in that: The ratio of the yield strength of the rebound structure to the yield strength of the stretchable wiring is 1.5-10; Preferably, the plurality of pixel islands are distributed in an array.

3. The display panel according to claim 1, characterized in that: The yield strength of the rebound structure is 30% to 150%.

4. The display panel according to claim 1, characterized in that: The rebound structure extends along a straight path; Preferably, the stretchable routing extends along a curved path.

5. The display panel according to claim 1, characterized in that: The stretchable trace has a curved section, the curved section includes two segments connected to each other, each of the segments includes a first curved section and a second curved section connected in sequence, and the first curved section is located between the pixel island and the second curved section; Preferably, the curved segment further comprises a second straight segment connected to the second curved segment, the second straight segment is located on a side of the second curved segment away from the first curved segment, and the second straight segments of two adjacent segments are connected to each other; Preferably, at least two of the stretchable traces are arranged between adjacent pixel islands; Preferably, the two stretchable traces connecting the same two pixel islands are arranged on both sides of the rebound structure; Preferably, the curved sections of the two stretchable traces connecting the same two pixel islands have opposite protruding directions; Preferably, the two stretchable traces connecting the same two pixel islands are symmetrically arranged about the rebound structure; Preferably, the stretchable wiring further has first straight segments located on both sides of the curved segment, and the stretchable wiring is connected to the pixel island via the first straight segments; Preferably, the two segments of the same stretchable wiring are symmetrically arranged about a first reference line, and the first reference line and the side-by-side arrangement directions of the two pixel islands connected by the curved segment intersect; Preferably, the two second straight line segments of the same stretchable trace are symmetrical about the first reference line axis.

6. The display panel according to claim 5, characterized in that: The first curved section and the second curved section have protruding directions opposite to each other.

7. The display panel according to claim 1, characterized in that: The stretchable trace has a first curved section and a second curved section connected in sequence, the first curved section is located between the pixel island and the second curved section, the first curved section includes a first segment and a second segment, the first segment is located between the pixel island and the second segment, the second segment is connected between the first segment and the second curved section, and the curvature radius of the first segment is greater than the curvature radius of the second segment; Preferably, the radius of curvature of the first segment is greater than or equal to 4 times the radius of curvature of the second segment; Preferably, the radius of curvature of the first segment is greater than or equal to 130 μm; Preferably, the radius of curvature of the second segment is greater than or equal to 30 μm; Preferably, the second curved segment includes a third segment and a fourth segment, the third segment is connected between the first curved segment and the fourth segment, the fourth segment is located between the third segment and the adjacent segment, and the curvature radii of the third segment and the fourth segment are the same or different; Preferably, the radius of curvature of the third segment is greater than or equal to 1.5 times the radius of curvature of the second segment; Preferably, the radius of curvature of the fourth segment is greater than or equal to 1.5 times the radius of curvature of the second segment; Preferably, the radius of curvature of the first segment is greater than or equal to 3 times the radius of curvature of the third segment; Preferably, the radius of curvature of the first segment is greater than or equal to 3 times the radius of curvature of the fourth segment; Preferably, the radius of curvature of the third segment is greater than or equal to 45 μm; Preferably, the radius of curvature of the fourth segment is greater than or equal to 45 μm.

8. The display panel according to claim 1, characterized in that: In a cross section perpendicular to the extension direction of the stretchable trace, the cross section of the stretchable trace has two first sides and two second sides that are oppositely disposed, the second sides are parallel to the flexible substrate, the size of the first side is a, the size of the second side is b, and a and b satisfy: a≤b≤4a; Preferably, a and b satisfy: b=8 / 6a.

9. The display panel according to claim 1, characterized in that: The display panel further includes: A protective layer, located on one side of the flexible substrate, wherein the stretchable trace is disposed in the protective layer; Preferably, a plurality of the stretchable wirings are arranged at intervals in the thickness direction of the display panel; Preferably, the protective layer is provided between the plurality of stretchable traces spaced apart in the thickness direction; Preferably, the orthographic projections of the plurality of stretchable traces spaced apart in the thickness direction overlap with each other in the flexible substrate.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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