Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device, the display panel comprises a display substrate and a touch layer, and the display substrate comprises an isolation dam; the touch layer is arranged on one side of the display substrate and comprises a plurality of touch signal lines, each touch signal line comprises a first touch line segment located in the frame area, and each first touch line segment comprises a first touch sub-line and a second touch sub-line; the touch layer further comprises a touch buffer layer and a touch insulating layer, the touch buffer layer is at least located between the first touch sub-line and the display substrate, and the touch insulating layer is at least located between the first touch sub-line and the second touch sub-line; the first touch sub-line and the second touch sub-line of each touch signal line are overlapped; on a projection plane perpendicular to the thickness direction of the display panel, the second touch sub-lines of at least part of the first touch line segments at least stop at the isolation dam in the transition area in the direction deviating from the display area.

Description

Technical Field

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

[0002] With the rapid development of AMOLED (Active Matrix Organic Light Emitting Diode) technology, people's demand for curved screen products is increasing.

[0003] In order to make the AMOLED display screen lighter, thinner and more integrated, FMLOC (Flexible Multi-Layer On Cell) technology was born. After the display substrate is manufactured, FMLOC technology is to manufacture the touch buffer layer, the first metal layer, the touch insulation layer, the second metal layer and the protective layer on the display substrate in sequence, wherein the touch buffer layer and the touch insulation layer are made of inorganic materials. However, the bending performance of inorganic materials is poor, which leads to the problem that the touch buffer layer and the touch insulation layer are prone to breakage during the display bending process.

[0004] In the related art, in order to solve the above problems, the touch buffer layer and the touch insulating layer are replaced with an organic material layer to improve the bending stress of the touch layer. However, organic materials have different properties from inorganic materials. After the touch buffer layer and the touch insulating layer are replaced with an organic material layer, defects are likely to occur during the process, resulting in failure of touch performance. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a display panel and a display device to solve the problem that the touch performance is easily invalidated after the buffer layer and the touch insulation layer of the touch layer are replaced with an organic material layer. The specific technical solution is as follows:

[0006] An embodiment of the first aspect of the present application provides a display panel, wherein the display panel has a display area and a non-display area, wherein the non-display area includes a frame area and a bending area, wherein the frame area surrounds the display area, and the bending area is located on a side of the frame area away from the display area; the frame area includes a transition area, and the transition area is located between the display area and the bending area; the display panel includes a display substrate, including an isolation dam, wherein the isolation dam is located in the frame area and is arranged around the display area; a touch layer is arranged on one side of the display substrate, including a plurality of touch signal lines, each of the touch signal lines includes a first touch signal line located in the frame area, and a second touch signal line located in the frame area. A touch line segment, the first touch line segment includes a first touch sub-line and a second touch sub-line; the touch layer also includes a touch buffer layer and a touch insulating layer, the touch buffer layer is at least located between the first touch sub-line and the display substrate, and the touch insulating layer is at least located between the first touch sub-line and the second touch sub-line; the first touch sub-line and the second touch sub-line of each of the touch signal lines are overlapped; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, at least part of the second touch sub-lines of the first touch line segment at least terminate at the isolation dam.

[0007] In some embodiments of the present application, the isolation dam includes a first sub-dam and a second sub-dam, the first sub-dam is located between the display area and the second sub-dam; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, at least part of the second touch sub-line of the first touch line segment terminates at least at the first sub-dam in a direction away from the display area.

[0008] In some embodiments of the present application, in the transition region, boundaries of at least part of the second touch sub-lines close to the bending region are located on a side of the first sub-dam close to the display region.

[0009] In some embodiments of the present application, in the transition region, boundaries of each of the second touch sub-lines close to the bending region are located on a side of the first sub-dam close to the display region.

[0010] In some embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, a portion of the second touch sub-lines of the first touch line segments at least terminate at the first sub-dam in a direction away from the display area, and another portion of the second touch sub-lines at least crosses the side of the first sub-dam close to the display area in a direction away from the display area.

[0011] In some embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, among two adjacent second touch sub-lines, the boundary of one of the second touch sub-lines close to the bending zone is located on the side of the first sub-dam close to the display area, and the other second touch sub-line at least crosses the first sub-dam in a direction away from the display area.

[0012] In some embodiments of the present application, the display substrate also includes an encapsulation layer, the encapsulation layer includes an organic encapsulation layer, and the isolation dam is used to block the organic encapsulation layer from extending in a direction away from the display area; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, at least part of the second touch sub-line of the first touch line segment terminates within the range of the organic encapsulation layer.

[0013] In some embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, along the direction away from the display area, the line width of a portion of the second touch sub-line of at least part of the first touch line segment close to the bending zone becomes narrower to form a narrow line portion; the boundary of the first sub-dam away from the display area is the first boundary, and along the direction away from the display area, the starting position of the narrow line portion is located at the first boundary or on the side of the first boundary close to the display area, and the boundaries on both sides of the narrow line portion in the line width direction are both within the range of the first touch sub-line.

[0014] In some embodiments of the present application, the transition zone is provided with a first transfer hole, and the first transfer hole is located between the isolation dam and the bending zone; the touch signal line also includes a second touch line segment, the second touch line segment is at least located in the bending zone, and the second touch line segment is overlapped with the first touch sub-line through the first transfer hole; the touch buffer layer is provided with a sinking groove, and the sinking groove is located on the side of the first transfer hole close to the display area, and is connected to the first transfer hole, so that the first touch sub-line enters the first transfer hole after sinking through the sinking groove.

[0015] In some embodiments of the present application, in the display area, the display substrate includes a driving layer, a first planarization layer, a second planarization layer, a third planarization layer and a light-emitting structure layer which are sequentially stacked in a direction close to the touch layer; the driving layer is provided with a plurality of thin film transistors, and the thin film transistors include a drain electrode; the light-emitting structure layer is provided with a plurality of organic light-emitting devices, and the organic light-emitting devices include an anode; a first transfer electrode is provided between the first planarization layer and the second planarization layer, and the first transfer electrode is respectively connected to the drain electrode and the anode; the first planarization layer, the second planarization layer and the third planarization layer extend from the display area to the frame area, the second touch line segment and the first transfer electrode are provided in the same layer, and the first transfer hole passes through the second planarization layer and the third planarization layer and then communicates with the sinking groove.

[0016] In some embodiments of the present application, a plurality of connection holes are provided on the touch insulating layer, the first touch sub-line and the second touch sub-line are overlapped through the connection holes, and the connection holes are located on a side of the first transfer hole close to the display area.

[0017] In some embodiments of the present application, the connection hole is located on a side of the isolation dam close to the display area.

[0018] In some embodiments of the present application, the touch buffer layer and the touch insulation layer are made of organic materials.

[0019] In an embodiment of the present application, by terminating the second touch sub-lines of at least part of the first touch line segments at least at the isolation dam in a direction away from the display area, that is, the boundaries of at least part of the second touch sub-lines close to the bending area do not extend to the side of the isolation dam close to the bending area, the number of second touch sub-lines is reduced in the area where the touch buffer layer and the touch insulating layer are thicker, thereby at least increasing the spacing between the second touch sub-lines in the area, and further, after the touch buffer layer and the touch insulating layer are replaced with organic materials, it is beneficial to improve the short circuit of the second touch sub-lines caused by incomplete etching, thereby improving the touch performance.

[0020] An embodiment of the second aspect of the present application provides a display panel, which has a display area and a non-display area, wherein the non-display area includes a border area and a bending area, the border area surrounds the display area, and the bending area is located on a side of the border area away from the display area; the border area includes a transition area, and the transition area is located between the display area and the bending area.

[0021] The display panel includes a display substrate, including an isolation dam, the isolation dam is located in the frame area and is arranged around the display area; a touch layer is arranged on one side of the display substrate, including a plurality of touch signal lines, each of the touch signal lines includes a first touch line segment located in the frame area, the first touch line segment includes a first touch sub-line and a second touch sub-line; the touch layer also includes a touch buffer layer and a touch insulating layer, the touch buffer layer is at least located between the first touch sub-line and the display substrate, and the touch insulating layer is at least located between the first touch sub-line and the second between the touch sub-lines; the first touch sub-line and the second touch sub-line of each of the touch signal lines are overlapped; on the projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, the line width of a part of the line segment of the second touch sub-line of at least part of the first touch line segment close to the bending area is narrowed to form a narrow line portion; the boundary of the isolation dam away from the display area is the second boundary, and along the direction away from the display area, the starting position of the narrow line portion is located at the second boundary or on the side of the second boundary close to the display area.

[0022] In some embodiments of the present application, the isolation dam includes a first sub-dam and a second sub-dam, the first sub-dam is located between the display area and the second sub-dam; on a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, the boundary of the first sub-dam away from the display area is a first boundary, the starting position of the narrow line portion is located at the first boundary or at a side of the first boundary close to the display area, and both side boundaries of the narrow line portion in the line width direction are located within the range of the first touch sub-line.

[0023] In some embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, the starting position of the narrow line portion is located on a side of the first sub-dam close to the display area.

[0024] In some embodiments of the present application, in the transition region, each of the second touch sub-lines is formed with the narrow line portion.

[0025] In some embodiments of the present application, the display substrate also includes an encapsulation layer, the encapsulation layer includes an organic encapsulation layer, and the isolation dam is used to block the organic encapsulation layer from extending in a direction away from the display area; on a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, along the direction away from the display area, the starting position of the narrow line portion is located within the range of the organic encapsulation layer or coincides with the boundary of the organic encapsulation layer, and both side boundaries of the narrow line portion in the line width direction are located within the range of the first touch sub-line.

[0026] In some embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along a direction away from the display area, at least part of the second touch sub-lines of the first touch line segments at least terminate at the isolation dam.

[0027] In some embodiments of the present application, the transition zone is provided with a first transfer hole, and the first transfer hole is located between the isolation dam and the bending zone; the touch signal line also includes a second touch line segment, and the second touch line segment is located in the bending zone, and the second touch line segment is overlapped with the first touch sub-line through the first transfer hole; the touch buffer layer is provided with a sinking groove, and the sinking groove is located on the side of the first transfer hole close to the display area, and is connected to the first transfer hole, so that the first touch sub-line enters the first transfer hole after sinking through the sinking groove.

[0028] In some embodiments of the present application, in the display area, the display substrate includes a driving layer, a first planarization layer, a second planarization layer, a third planarization layer and a light-emitting structure layer which are sequentially stacked in a direction close to the touch layer; the driving layer is provided with a plurality of thin film transistors, and the thin film transistors include a drain electrode; the light-emitting structure layer is provided with a plurality of organic light-emitting devices, and the organic light-emitting devices include an anode; a first transfer electrode is provided between the first planarization layer and the second planarization layer, and the first transfer electrode is respectively connected to the drain electrode and the anode; the first planarization layer, the second planarization layer and the third planarization layer extend from the display area to the frame area, the second touch line segment and the first transfer electrode are provided in the same layer, and the first transfer hole passes through the second planarization layer and the third planarization layer and then communicates with the sinking groove.

[0029] In some embodiments of the present application, a plurality of connection holes are provided on the touch insulating layer, the first touch sub-line and the second touch sub-line are overlapped through the connection holes, and the connection holes are located on a side of the first transfer hole close to the display area.

[0030] In some embodiments of the present application, the connection hole is located on a side of the isolation dam close to the display area.

[0031] In some embodiments of the present application, the touch buffer layer and the touch insulation layer are made of organic materials.

[0032] In an embodiment of the present application, by narrowing the line width of the second touch sub-line of at least part of the first touch line segment at least after crossing the isolation dam, the spacing between at least part of the second touch sub-line is increased in the area where the touch buffer layer and the touch insulating layer are thicker, and then after the touch buffer layer and the touch insulating layer are replaced with organic materials, it is beneficial to improve the short circuit of the second touch sub-line caused by incomplete etching, thereby improving the touch performance.

[0033] An embodiment of the third aspect of the present application provides a display panel, the display panel having a display area and a non-display area, the non-display area including a border area and a bending area, the border area surrounds the display area, the bending area is located on a side of the border area away from the display area; the border area includes a transition area, and the transition area is located between the display area and the bending area.

[0034] The display panel includes a display substrate; a touch layer, which is arranged on one side of the display substrate and includes a plurality of touch signal lines, wherein the touch signal lines include a first touch line segment located in the frame area and a second touch line segment located at least in the bending area, and the transition area is provided with a first transfer hole, and the second touch line segment is overlapped with the first touch line segment through the first transfer hole; the touch layer also includes a touch buffer layer, and the touch buffer layer is at least located between the first touch line segment and the display substrate; the touch buffer layer is provided with a sinking groove, and the sinking groove is located on a side of the first transfer hole close to the display area and is connected to the first transfer hole, so that the first touch line segment enters the first transfer hole after sinking through the sinking groove.

[0035] In some embodiments of the present application, in the display area, the display substrate includes a driving layer, a first planarization layer, a second planarization layer, a third planarization layer and a light-emitting structure layer which are sequentially stacked in a direction close to the touch layer; the driving layer is provided with a plurality of thin film transistors, and the thin film transistors include a drain electrode; the light-emitting structure layer is provided with a plurality of organic light-emitting devices, and the organic light-emitting devices include an anode; a first transfer electrode is provided between the first planarization layer and the second planarization layer, and the first transfer electrode is respectively connected to the drain electrode and the anode; the first planarization layer, the second planarization layer and the third planarization layer extend from the display area to the frame area, the second touch line segment and the first transfer electrode are provided in the same layer, and the first transfer hole passes through the second planarization layer and the third planarization layer and then communicates with the sinking groove.

[0036] In some embodiments of the present application, the first touch line segment includes a first touch sub-line and a second touch sub-line, and the second touch sub-line is located on a side of the first touch sub-line away from the touch buffer layer; the touch layer also includes a touch insulation layer, and the touch insulation layer is at least located between the first touch sub-line and the second touch sub-line; a plurality of connection holes are provided on the touch insulation layer, and the connection holes are located on a side of the first transfer hole close to the display area, and the first touch sub-line and the second touch sub-line are overlapped through the connection holes; the first touch sub-line is overlapped with the second touch line segment through the first transfer hole.

[0037] In some embodiments of the present application, the touch buffer layer and the touch insulation layer are made of organic materials.

[0038] In some embodiments of the present application, the display substrate includes an isolation dam, which is located in the border area and is arranged around the display area; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, at least part of the second touch sub-line of the first touch line segment at least terminates at the isolation dam; and / or, a part of the line width of the second touch sub-line of at least part of the first touch line segment close to the bending area is narrowed to form a narrow line portion, and the boundary of the isolation dam away from the display area is the second boundary, and along the direction away from the display area, the starting position of the narrow line portion is located at the second boundary or on the side of the second boundary close to the display area.

[0039] In some embodiments of the present application, the connection hole is located on a side of the isolation dam close to the display area.

[0040] In the embodiment of the present application, by providing a sinking groove, it is possible to avoid the touch buffer layer being flush with the boundary of the organic film layer of the display substrate. The first touch line segment can first sink to the bottom of the sinking groove, and then overlap with the second touch line segment through the first adapter hole. That is, the first touch line segment sinks in a multi-step manner and then overlaps with the second touch line segment. In this way, the depth of the first adapter hole can be reduced, thereby effectively improving the breakage of the first touch line segment.

[0041] An embodiment of the fourth aspect of the present application provides a display device, comprising the display panel in any embodiment of the first aspect, the second aspect or the third aspect. Since it has the display panel in any embodiment of the first aspect, the second aspect or the third aspect, it also has the beneficial effects of any embodiment of the first aspect, the second aspect or the third aspect, which will not be repeated here.

[0042] Of course, it is not necessary to achieve all of the advantages described above at the same time to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0044] Figure 1 It is a structural schematic diagram of a display panel in the related art;

[0045] Figure 2 It is a schematic diagram of a partial structure of a touch wiring of a display panel in the related art;

[0046] Figure 3 A common front view of a display panel provided in the three embodiments of the present application;

[0047] Figure 4 for Figure 3 The structure schematic diagram of the display panel in the thickness direction is shown;

[0048] Figure 5 for Figure 3 A magnified schematic diagram of part A;

[0049] Figure 6 An enlarged view of a first structure of part B of a display panel provided in an embodiment of the first aspect of the present application;

[0050] Figure 7 An enlarged view of a second structure of part B of the display panel provided in the embodiment of the first aspect of the present application;

[0051] Figure 8 A third partial structure enlarged diagram of part B of the display panel provided in the embodiment of the first aspect of the present application;

[0052] Fig. 9 A fourth partial structure enlarged diagram of part B of the display panel provided in the embodiment of the first aspect of the present application;

[0053] Fig.10 A cross-sectional view of a CC portion of a display panel provided in an embodiment of the first aspect of the present application;

[0054] Fig.11 for Figure 5 A cross-sectional view of an embodiment of the DD portion;

[0055] Fig.12 for Figure 6 An enlarged top view of the first transfer hole;

[0056] Fig.13 for Figure 5A cross-sectional view of another embodiment of the DD portion;

[0057] Fig.14 for Figure 6 A schematic structural diagram of another embodiment of the first transfer hole in FIG.

[0058] Fig.15 An enlarged view of a first local structure of part B of a display panel provided in an embodiment of the second aspect of the present application;

[0059] Fig.16 A second enlarged view of a local structure of part B of a display panel provided in an embodiment of the second aspect of the present application;

[0060] Fig.17 A third partial structure enlarged diagram of part B of the display panel provided in the embodiment of the second aspect of the present application;

[0061] Fig.18 A fourth partial structure enlarged diagram of part B of the display panel provided in the embodiment of the second aspect of the present application;

[0062] Fig.19 A cross-sectional view of a CC portion of a display panel provided in an embodiment of the second aspect of the present application;

[0063] Figure 1 and Figure 2 Middle: display panel 90; display substrate 91; touch layer 92; touch buffer layer 921; first metal layer 922; touch insulation layer 923; second metal layer 924; protection layer 925; first touch line segment 926; first touch sub-line 927; second touch sub-line 928; transfer hole 929; second touch line segment 930; isolation dam 94; bending area AC;

[0064] Figures 3 to 19In the figure: display panel 10; display substrate 100; substrate layer 110; first liner 111; first barrier layer 112; second liner 113; second barrier layer 114; driving layer 120; thin film transistor 121; active region 122; gate 123; drain 124; source 125; first electrode 126; second electrode 127; first gate insulating layer 128; second gate insulating layer 129; interlayer dielectric layer 130; first planarization layer 131; second planarization layer 132; third planarization layer 133; first transfer electrode 134; second transfer electrode 135; light emitting structure layer 140; anode 141; light emitting layer 142; cathode 143; pixel definition layer 144; encapsulation layer 150; inorganic encapsulation layer 151; organic encapsulation layer 152; substrate barrier layer 160; isolation dam 170; first sub-dam 171; second sub-dam 172; touch touch control layer 200; touch signal line 201; first touch line segment 210; first touch sub-line 211; second touch sub-line 212; narrow line portion 2121; second touch line segment 220; third touch line segment 230; touch buffer layer 240; sinking groove 241; touch insulation layer 250; connection hole 251; protection layer 260; first metal layer 270; touch electrode 271; touch transmitting electrode 272; touch receiving electrode 273; second metal layer 280; bridging electrode 281; first transfer hole 300; transfer line 301; display area AA; frame area AB; transition area AB1; first fan-out area FA1; bending area AC; binding area AD; second fan-out area FA2; circuit test area CT; third fan-out area FA3; integrated circuit area IC; flexible circuit board FPC; first power line VSS; second power line VDD; first boundary L1. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present invention.

[0066] like Figure 1 As shown, in the related art, the display panel 90 includes a display substrate 91 and a touch layer 92. The touch layer 92 can be directly formed on the display substrate 91 using the FMLOC technology. The touch layer 92 can include a touch buffer layer 921, a first metal layer 922, a touch insulating layer 923, a second metal layer 924 and a protective layer 925, wherein the first metal layer 922 is located on the side of the touch buffer layer 921 away from the display substrate 91 and is covered by the touch insulating layer 923; the second metal layer 924 is located on the side of the touch insulating layer 923 away from the display substrate 91 and is covered by the protective layer 925.

[0067] The touch buffer layer 921 and the touch insulating layer 923 are generally made of inorganic materials. However, inorganic materials have poor bending properties, which may cause the touch buffer layer 921 and the touch insulating layer 923 to break easily during the bending process of the display panel 90 .

[0068] In the related art, in order to solve the above problems, the touch buffer layer 921 and the touch insulating layer 923 are replaced by an organic material layer to improve the bending stress of the touch layer 92. However, organic materials and inorganic materials have different properties. After the touch buffer layer 921 and the touch insulating layer 923 are replaced by an organic material layer, defects are likely to occur during the process, resulting in failure of touch performance.

[0069] In view of this, the present application provides three embodiments, each of which provides a display panel 10. The front views of the display panels 10 in the three embodiments of the present application are the same, see Figure 3 In the three embodiments of the present application, the display panel 10 has a display area AA and a non-display area, the non-display area includes a border area AB and a bending area AC, the border area AB surrounds the display area AA, and the bending area AC is located on the side of the border area AB away from the display area AA; the border area AB includes a transition area AB1, and the transition area AB1 is located between the display area AA and the bending area AC.

[0070] See also Figure 4 , Figure 4 Schematic diagram of the structure of the display panel 10 in the thickness direction of the three embodiments of the present application, as shown in FIG. Figure 4 As shown, the display panel 10 includes a display substrate 100 and a touch layer 200 .

[0071] See also Figure 5 , Figure 5 The display panel 10 of the three embodiments of the present application is Figure 3 The enlarged schematic diagram of part A is shown. Figure 5 As shown, the display substrate 100 includes an isolation dam 170, which is located in the frame area AB and surrounds the display area AA. The touch layer 200 is disposed on one side of the display substrate 100. The touch layer 200 includes a plurality of touch signal lines 201, each of which includes a first touch line segment 210 located in the frame area AB.

[0072] First, the display panel 10 according to the first aspect of the present application is described in detail.

[0073] In addition to having Figures 3 to 5 The display panel 10 of the first aspect of the present application has other improvements. Figures 6 to 9 , Figures 6 to 9The display panel 10 of the first embodiment of the present application is shown in FIG. Figure 5 The structure of various embodiments of the B part is enlarged. Figures 6 to 9 As shown, in the first embodiment of the present application, the first touch line segment 210 includes a first touch sub-line 211 and a second touch sub-line 212 .

[0074] See also Fig.10 , Fig.10 The display panel 10 of the first embodiment of the present application is Figure 5 The cross-sectional view of the CC portion is shown as Fig.10 As shown, the touch layer 200 also includes a touch buffer layer 240 and a touch insulating layer 250. The touch buffer layer 240 is at least located between the first touch sub-line 211 and the display substrate 100, and the touch insulating layer 250 is at least located between the first touch sub-line 211 and the second touch sub-line 212. The first touch sub-line 211 and the second touch sub-line 212 of each touch signal line 201 are overlapped.

[0075] In the embodiment of the present application, the touch buffer layer 240 and the touch insulating layer 250 are made of organic materials, thereby improving the bending performance of the touch buffer layer 240 and the touch insulating layer 250 and improving the fracture of the display panel 10 during the bending process.

[0076] like Figures 6 to 9 As shown, in the first embodiment of the present application, on a projection plane perpendicular to the thickness direction of the display panel 10 , in the transition area AB1 , along a direction away from the display area AA, at least part of the second touch sub-lines 212 of the first touch line segments 210 at least terminate at the isolation dam 170 .

[0077] In the embodiments of the present application, Figures 6 to 9 As shown, by terminating the second touch sub-lines 212 of at least part of the first touch line segments 210 at least at the isolation dam 170 in the direction away from the display area AA, that is, the boundaries of at least part of the second touch sub-lines 212 near the bending area AC do not extend to the side of the isolation dam 170 near the bending area AC, the number of second touch sub-lines 212 is reduced in the area where the touch buffer layer 240 and the touch insulating layer 250 are thicker, thereby at least increasing the spacing between the second touch sub-lines 212 in the area, so that after the touch buffer layer 240 and the touch insulating layer 250 are replaced with organic materials, it is beneficial to improve the short circuit of the second touch sub-lines 212 caused by incomplete etching and improve the touch performance.

[0078] Specifically, Fig.10As shown, the display substrate 100 is provided with an isolation dam 170, which can block part of the film layers of the display substrate 100, such as the organic encapsulation layer 152, and can also block external water vapor or oxygen from entering the display area AA. Since part of the film layers of the display substrate 100 are terminated at the isolation dam 170, there is a groove in part of the area of ​​the isolation dam 170 close to the bending area AC, and the thickness of the touch buffer layer 240 at the groove is increased. When the touch buffer layer 240 and the touch insulating layer 250 are replaced with organic materials, the organic materials are easy to absorb water during the process, and the thicker organic film layer is prone to incomplete drying after the high-temperature baking process, which makes it easy for the metal at this location to be etched incompletely.

[0079] In addition, since the first touch sub-line 211 is formed on the touch buffer layer 240 and the second touch sub-line 212 is formed on the touch insulating layer 250, the thickness of the organic material layer under the second touch sub-line 212 is thicker, which also results in that after the touch buffer layer 240 and the touch insulating layer 250 are replaced with organic materials, the second touch sub-line 212 is prone to incomplete etching.

[0080] In the first aspect of the embodiment of the present application, the number of second touch sub-lines 212 is reduced in the area where the touch buffer layer 240 and the touch insulating layer 250 are thicker, thereby at least increasing the spacing between the second touch sub-lines 212 in the area. After the touch buffer layer 240 and the touch insulating layer 250 are replaced with organic materials, it is beneficial to improve the short circuit of the second touch sub-lines 212 caused by incomplete etching, thereby improving the touch performance.

[0081] It should be noted that in Figure 6 and Figure 7 In order to illustrate the second touch sub-line 212 and the first touch sub-line 211 at the same time, the width of the first touch sub-line 211 located on the lower side is wider than the second touch sub-line 212. In actual applications, the widths of the first touch sub-line 211 and the second touch sub-line 212 may be equal or unequal, and the present application does not impose any limitation on this.

[0082] It should be noted that if Figures 6 to 9 As shown, the second touch sub-line 212 of at least part of the first touch line segment 210 at least terminates at the isolation dam 170, which means that the second touch sub-line 212 of at least part of the first touch line segment 210 does not extend to the side of the isolation dam 170 close to the bending area AC in the direction away from the display area AA, that is, the boundary of at least part of the second touch sub-line 212 close to the bending area AC is located on the side of the isolation dam 170 close to the display area AA or within the range of the isolation dam 170.

[0083] In the embodiments of the present application, Figure 4As shown, the touch layer 200 may include a first metal layer 270 and a second metal layer 280, wherein the first metal layer 270 is located between the touch buffer layer 240 and the touch insulating layer 250, and the second metal layer 280 is located on a side of the touch insulating layer 250 away from the display substrate 100. Figure 5 As shown, the first metal layer 270 and the second metal layer 280 are used to form a plurality of touch electrodes 271 in the display area AA, and a plurality of touch signal lines 201 in the non-display area. The non-display area also includes a binding area AD, which is located on the side of the bending area AC away from the display area AA. The binding area AD is bent to the back of the display panel 10 through the bending area AC. The binding area AD is provided with a flexible circuit board FPC. One end of the touch signal line 201 is connected to the touch electrode 271, and the other end of the touch signal line 201 extends to the binding area AD through the frame area AB and the bending area AC, and is connected to the flexible circuit board FPC.

[0084] like Figure 5 As shown, the touch signal line 201 may further include a second touch line segment 220 and a third touch line segment 230, wherein the second touch line segment 220 is at least located in the bending area AC, and the third touch line segment 230 is located in the binding area AD. The second touch line segment 220 and the first touch line segment 210 and the third touch line segment 230 are in different film layers. Figure 6 As shown, a first transfer hole 300 is provided in the transition area AB1, and the first transfer hole 300 is located on the side of the isolation dam 170 close to the bending area AC. The second touch line segment 220 extends into the first transfer hole 300, and the second touch line segment 220 can overlap with the first touch line segment 210 through the first transfer hole 300. Correspondingly, a second transfer hole is provided on the side of the binding area AD close to the bending area AC, and the second touch line segment 220 also extends into the second transfer hole, and the second touch line segment 220 can also overlap with the third touch line segment 230 through the second transfer hole, thereby, the touch signal can be transmitted from the display area AA to the flexible circuit board FPC, and the influence of the bending on the touch signal line 201 can be avoided.

[0085] In the embodiments of the present application, Fig.10 As shown, the first touch line segment 210 includes a first touch sub-line 211 and a second touch sub-line 212, that is, the first touch line segment 210 adopts a double-layer metal routing. The first touch sub-line 211 is located in the first metal layer 270, and the second touch sub-line 212 is located in the second metal layer 280. The touch insulating layer 250 may be provided with a plurality of connection holes 251, and the second touch sub-line 212 may be overlapped with the first touch sub-line 211 through the plurality of connection holes 251, thereby realizing the parallel connection of the first touch sub-line 211 and the second touch sub-line 212, which is beneficial to reduce the line resistance.

[0086] For comparison, see Figure 2, Figure 2 FIG. 1 is a schematic diagram of the wiring of the touch signal line of the display panel 90 in the frame area in the related art. Figure 2 As shown, in the related art, the first touch sub-line 927 and the second touch sub-line 928 of the first touch line segment 926 are both extended to the transfer hole 929. In the transfer hole 929, the second touch sub-line 928 overlaps with the first touch sub-line 927, and the first touch sub-line 927 overlaps with the second touch line segment 930. Since the transfer hole 929 is located on the side of the isolation dam 94 close to the bending area AC, in the related art, the first touch sub-line 927 and the second touch sub-line 928 need to extend to the side of the isolation dam 94 close to the bending area AC. Since the thickness of the touch buffer layer 921 increases on the side of the isolation dam 94 close to the bending area AC, and since the touch buffer layer 921 and the touch insulating layer 923 are organic materials, organic materials are easy to absorb water during the process, and the thicker organic film layer is prone to incomplete drying after the high-temperature baking process, the second touch sub-line 928 is prone to incomplete etching on the side of the isolation dam 94 close to the bending area AC, resulting in the connection of two adjacent second touch sub-lines 928 and a short circuit.

[0087] In the first embodiment of the present application, Figures 6 to 9 As shown, in the transition area AB1, at least part of the second touch sub-lines 212 of the first touch line segments 210 at least terminate at the isolation dam 170. Therefore, in the thicker area of ​​the touch buffer layer 240, the number of the second touch sub-lines 212 is reduced, so that at least the spacing between the second touch sub-lines 212 in the area can be increased, which is beneficial to improve the short circuit of the second touch sub-lines 212 in the case of incomplete etching and improve the touch performance.

[0088] In the embodiments of the present application, Fig.10 As shown, the display substrate 100 includes an encapsulation layer 150, the encapsulation layer 150 includes an organic encapsulation layer 152, the organic encapsulation layer 152 has a certain fluidity, and the isolation dam 170 is used to prevent the organic encapsulation layer 152 from extending in a direction away from the display area AA. The isolation dam 170 may include a first sub-dam 171 and a second sub-dam 172, and the first sub-dam 171 is located between the display area AA and the second sub-dam 172. Figures 6 to 9 As shown, on a projection plane perpendicular to the thickness direction of the display panel 10 , in the transition region, at least part of the second touch sub-lines 212 of the first touch line segments 210 at least terminate at the first sub-dam 171 in a direction away from the display area AA.

[0089] In the embodiment of the present application, the isolation dam 170 includes a first sub-dam 171 and a second sub-dam 172. Since the organic encapsulation layer 152 terminates at the first sub-dam 171, there is a groove between the first sub-dam 171 and the second sub-dam 172 and on the side of the second sub-dam 172 close to the bending area AC, and the thickness of the touch buffer layer 240 at the groove is increased. By setting the boundary of each second touch sub-line 212 close to the bending area AC on the side of the first sub-dam 171 close to the display area AA, each second touch sub-line 212 does not extend to the side of the first sub-dam 171 close to the bending area AC in the direction away from the display area AA, and each second touch sub-line 212 can avoid the thicker area of ​​the touch buffer layer 240 to avoid short circuit.

[0090] It should be noted that at least part of the second touch sub-line 212 at least terminates at the first sub-dam 171 along the direction away from the display area AA, which means that at least part of the second touch sub-line 212 does not extend to the side of the first sub-dam 171 close to the bending area AC along the direction away from the display area AA. Figure 6 As shown, at least part of the second touch sub-line 212 has a boundary close to the bending area AC located on a side of the first sub-dam 171 close to the display area AA. Figure 7 As shown, at least a portion of the second touch sub-line 212 has a boundary close to the bending area AC located within the range of the first sub-dam 171 .

[0091] exist Figure 6 In the illustrated embodiment, on a projection plane perpendicular to the thickness direction of the display panel 10, the boundaries of each second touch sub-line 212 close to the bending area AC are all located on the side of the first sub-dam 171 close to the display area AA, and accordingly, the connection holes 251 are all located on the side of the first sub-dam 171 close to the display area AA. Thus, each second touch sub-line 212 can avoid the thicker area of ​​the touch buffer layer 240 to avoid short circuit. In addition, by setting the boundaries of each second touch sub-line 212 close to the bending area AC on the side of the first sub-dam 171 close to the display area AA, the second touch sub-line 212 can avoid the organic groove area that may appear between the organic encapsulation layer 152 and the first sub-dam 171 as much as possible, which is conducive to improving the short circuit of the second touch sub-line 212 caused by incomplete etching and improving the touch performance.

[0092] Specifically, in actual applications, due to the limitations of process conditions, the organic encapsulation layer 152 may stop flowing before contacting the first sub-dam 171, resulting in the organic encapsulation layer 152 not contacting the first sub-dam 171, and an organic groove may be formed between the organic encapsulation layer 152 and the first sub-dam 171. When the touch buffer layer 240 is manufactured, the touch buffer layer 240 will enter the organic groove, so that the thickness of the touch buffer layer 240 is relatively large at the organic groove, and incomplete etching is prone to occur.

[0093] In view of this situation, preferably, on a projection plane perpendicular to the thickness direction of the display panel 10, the second touch sub-line 212 of each first touch line segment 210 ends within the range of the organic encapsulation layer 152. Fig.10 As shown, the boundary of each second touch sub-line 212 near the bending area AC does not exceed the range of the organic encapsulation layer 152. Therefore, each second touch sub-line 212 can completely avoid all possible thicker areas of the touch buffer layer 240, thereby preventing incomplete etching.

[0094] exist Figure 7 In the embodiment shown, Figure 6 The difference from the illustrated embodiment is that each second touch sub-line 212 may also terminate at the first sub-dam 171. That is, the boundary of the second touch sub-line 212 close to the bending area AC is located within the range of the first sub-dam 171. Since under ideal conditions, there is no organic groove between the organic encapsulation layer 152 and the first sub-dam 171, each second touch sub-line 212 only needs to avoid extending to the side of the first sub-dam 171 close to the bending area AC, and can completely avoid the thicker position of the touch buffer layer 240 in this area.

[0095] In other embodiments of the present application, the isolation dam 170 may not include the second sub-dam 172. The isolation dam 170 only includes a dam body structure. On the projection plane perpendicular to the thickness direction of the display panel 10, the boundary of each second touch sub-line 212 on the side close to the bending area AC at least ends at the dam body structure in the direction away from the display area AA, that is, the boundary of each second touch sub-line 212 on the side close to the bending area AC is located on the side of the dam body structure close to the display area AA, or is located within the range of the dam body structure, and each second touch sub-line 212 does not extend to the side of the dam body structure close to the bending area AC. Accordingly, the connecting hole 251 is located on the side of the dam body structure close to the display area AA, so that each second touch sub-line 212 can avoid the thicker area of ​​the touch buffer layer 240 to avoid a short circuit.

[0096] In such Figure 8 and Fig. 9 In the embodiment shown, Figure 6 and Figure 7The difference between the illustrated embodiments is that, on a projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, the second touch sub-lines 212 of a portion of the first touch line segments 210 at least terminate at the first sub-dam 171 in a direction away from the display area AA, and another portion of the second touch sub-lines 212 crosses over the side of the first sub-dam 171 close to the display area AA in a direction away from the display area AA. As a result, the extension length of a portion of the second touch sub-lines 212 in the frame area AB is longer, so that the first touch line segments 210 can be more double-layered, which is beneficial to improving the transmission efficiency of the first touch line segments 210 while improving the short circuit of the second touch sub-lines 212.

[0097] exist Figure 8 In the illustrated embodiment, on a projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, of two adjacent second touch sub-lines 212, the boundary of one of the second touch sub-lines 212 close to the bending area AC is located on the side of the first sub-dam 171 close to the display area AA, and the other second touch sub-line 212 crosses the second sub-dam 172 in a direction away from the display area AA. As a result, on the side of the first sub-dam 171 close to the bending area AC, the spacing between the second touch sub-lines 212 is increased, so that the short circuit of the second touch sub-lines 212 can be improved in the case of incomplete etching.

[0098] In other embodiments, the arrangement of the second touch sub-lines 212 may be different, as long as the spacing between the second touch sub-lines 212 is increased at the thicker film layer of the touch buffer layer 240. This application does not limit this.

[0099] Furthermore, the connection hole 251 is located on a side of the first transfer hole 300 close to the display area AA, and the second touch sub-line 212 and the first touch sub-line 211 are overlapped only in the connection hole 251, and the second touch sub-line 212 does not enter the first transfer hole 300. Thus, the second touch sub-line 212 can be prevented from being broken in the first transfer hole 300 due to the deepness of the first transfer hole 300.

[0100] Furthermore, in a preferred embodiment, each connection hole 251 is located at a side of the first sub-dam 171 close to the display area AA, so that the connection hole 251 can avoid a location where the touch buffer layer 240 has a thicker film.

[0101] exist Fig. 9 In the embodiment shown, Figure 8The difference of the illustrated embodiment is that, in the transition area AB1, on the projection plane perpendicular to the thickness direction of the display panel 10, of the two adjacent second touch sub-lines 212, one of the second touch sub-lines 212 ends at the first sub-dam 171, and the other second touch sub-line 212 crosses the second sub-dam 172 in a direction away from the display area AA. As a result, on the side of the first sub-dam 171 close to the bending area AC, the spacing between the second touch sub-lines 212 is increased, so that the short circuit of the second touch sub-lines 212 can be improved in the case of incomplete etching.

[0102] In other embodiments of the first aspect of the present application, the isolation dam 170 may not include the second sub-dam 172, and the isolation dam 170 only includes a dam structure. On a projection plane perpendicular to the thickness direction of the display panel 10, the boundary of a part of the second touch sub-lines 212 close to the bending area AC at least ends at the dam structure in the direction away from the display area AA, and a part of the second touch sub-lines 212 cross the dam structure in the direction away from the display area AA. As a result, the extension length of part of the second touch sub-lines 212 in the frame area AB is longer, so that the first touch line segment 210 can use more double-layer routing, which is beneficial to improve the transmission efficiency of the first touch line segment 210 while improving the short circuit of the second touch sub-lines 212.

[0103] In other embodiments of the first aspect of the present application, in the transition area AB1, the line width of a portion of the second touch sub-line 212 of at least part of the first touch line segment 210 near the bending area AC is narrowed to form a narrow line portion 2121. The boundary of the first sub-dam 171 away from the display area AA is the first boundary L1, and along the direction away from the display area AA, the starting position of the narrow line portion 2121 is located at the first boundary L1 or a side of the first boundary L1 near the display area AA, and both sides of the narrow line portion 2121 in the line width direction are located within the range of the first touch sub-line 211, that is, the line width of the narrow line portion 2121 is smaller than that of the first touch sub-line 211. By setting a narrow line portion 2121 for the second touch sub-line 212 and setting the starting position of the narrow line portion 2121 on the first boundary L1 or on the side of the first boundary L1 close to the display area AA, the spacing between the second touch sub-lines 212 in the thicker area of ​​the touch buffer layer 240 can be further increased. The spacing between the second touch sub-lines 212 is at least larger than the spacing between the first touch sub-lines 211, so that the short circuit of the second touch sub-lines 212 can be further improved in the case of incomplete etching.

[0104] In the embodiment of the present application, there is no restriction on the number of second touch sub-lines 212 with narrowed line widths. In the thicker portion of the touch insulating layer 250, all of the second touch sub-lines 212 may have their line widths narrowed to form narrow line portions 2121, or only a portion of the second touch sub-lines 212 may have their line widths narrowed to form narrow line portions 2121. The present application does not impose any restriction on this.

[0105] In the embodiment of the first aspect of the present application, the touch layer 200 has a touch function, and the touch function can be implemented using the mutual capacitance touch principle. Figure 5 As shown, the touch electrode 271 may include a touch transmitting electrode 272 and a touch receiving electrode 273, a plurality of touch transmitting electrodes 272 constitute a touch transmitting electrode line extending in the horizontal direction, a plurality of touch receiving electrodes 273 constitute a touch receiving electrode line extending in the vertical direction, a plurality of touch transmitting electrodes 272 and a plurality of touch receiving electrodes 273 intersect each other, and a touch capacitor is formed at the intersection of the touch transmitting electrode 272 and the touch receiving electrode 273. A portion of the touch signal line 201 is connected to the touch transmitting electrode line for transmitting a transmitting signal; another portion of the touch signal line 201 is connected to the touch receiving electrode line for transmitting a receiving signal. When the user's finger approaches the touch layer 200, the touch capacitance will change. The flexible circuit board FPC of the display panel 10 transmits a transmitting signal to the touch transmitting electrode line through the touch signal line 201, and receives a signal from the touch receiving electrode line through the touch signal line 201, thereby obtaining a touch capacitance value, and calculating the coordinates of the touch point according to the change in the touch capacitance value, thereby realizing the touch function.

[0106] For ease of explanation, Figure 5 Only a part of the touch signal lines 201 are shown. In practical applications, each touch transmitting electrode line and each touch receiving electrode line need to be connected to the touch signal line 201 .

[0107] The touch transmitting electrode 272 and the touch receiving electrode 273 can be arranged in the same layer, see Fig.11 , Fig.11 The display panel 10 provided in the first aspect of the present application is shown in FIG. Figure 5 A cross-sectional view of the DD portion is shown. Fig.11As shown, the touch transmitting electrode 272 may be located in the second metal layer 280, and the first metal layer 270 is further provided with a bridging electrode 281. The touch transmitting electrode 272 is connected via the bridging electrode 281, and the touch receiving electrode 273 may be directly connected to the second metal layer 280. In other embodiments of the present application, the touch transmitting electrode 272 and the touch receiving electrode 273 may be formed in the first metal layer 270, and the second metal layer 280 is formed with the bridging electrode 281; or, the touch transmitting electrode 272 may be directly connected to the second metal layer 280, and the touch receiving electrode 273 may be connected via the bridging electrode 281. The present application does not limit this.

[0108] In other embodiments of the present application, the touch function may also be implemented through the self-capacitive touch principle, and the present application does not impose any limitation on this.

[0109] like Fig.11 As shown, in the embodiment of the first aspect of the present application, the touch layer 200 may further include a protective layer 260, which is located on the side of the second metal layer 280 away from the display substrate 100. The touch layer 200 may be directly formed on the display substrate 100 by FMLOC technology.

[0110] Furthermore, the display substrate 100 may include a substrate layer 110 , a driving layer 120 , and a light emitting structure layer 140 which are sequentially stacked.

[0111] The substrate layer 110 may include a first backing plate 111 and a second backing plate 113. The first backing plate 111 and the second backing plate 113 may be formed of flexible organic materials. For example, they may be formed of polymer materials such as polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyarylate or glass fiber reinforced plastic. The substrate layer 110 may also include a first barrier layer 112. The first barrier layer 112 is located between the first backing plate 111 and the second backing plate 113. The first barrier layer 112 may be made of materials such as silicon nitride and silicon oxide to achieve the effect of blocking water and oxygen and blocking alkaline ions. In addition, as Fig.10 As shown, the substrate layer 110 extends from the display area AA to the bending area AC. It is understandable that the structure of the substrate layer 110 can be determined according to actual needs, and the present application does not limit this.

[0112] like Fig.11 As shown, the driving layer 120 is located on one side of the substrate layer 110, and a second barrier layer 114 is disposed between the driving layer 120 and the substrate layer 110. The driving layer 120 may include a thin film transistor 121, and the thin film transistor 121 includes an active region 122, a gate 123, a source 125, and a drain 124. Fig.11In the illustrated embodiment, the thin film transistor 121 adopts a top gate structure, and the driving layer 120 further includes a first gate insulating layer 128, a second gate insulating layer 129, and an interlayer dielectric layer 130 which are stacked, wherein the active region 122 is arranged above the substrate layer 110, the first gate insulating layer 128 covers the active region 122, the gate 123 is arranged above the first gate insulating layer 128, the second gate insulating layer 129 covers the gate 123, the source 125 and the drain 124 are arranged above the interlayer dielectric layer 130, and the source 125 and the drain 124 are connected to the active region 122 through metal vias arranged in the first gate insulating layer 128, the second gate insulating layer 129, and the interlayer dielectric layer 130, respectively. In other embodiments of the present application, the thin film transistor 121 may also adopt a bottom gate structure.

[0113] The driving layer 120 may further include a capacitor structure, which includes a first electrode plate 126 and a second electrode plate 127 that are arranged opposite to each other. The first electrode plate 126 may be arranged in the same layer as the gate 123 , and the second electrode plate 127 is arranged above the second gate insulating layer 129 and between the interlayer dielectric layers 130 .

[0114] A first planarization layer 131 and a second planarization layer 132 are further provided on the side of the driving layer 120 facing away from the substrate layer 110. The first planarization layer 131 covers the source electrode 125 and the drain electrode 124. A first switching electrode 134 is provided between the first planarization layer 131 and the second planarization layer 132. The first switching electrode 134 is connected to the drain electrode 124 through a metal via provided in the first planarization layer 131. Fig.10 As shown, the first planarization layer 131 and the second planarization layer 132 also extend to the bending area AC. The first planarization layer 131 and the second planarization layer 132 may include an organic insulating material, such as polyimide, epoxy resin, acrylic, polyester, photoresist, polyacrylate, polyamide, siloxane and other resin materials. For another example, the organic insulating material includes an elastic material, such as urethane, thermoplastic polyurethane (TPU) and the like.

[0115] like Fig.11 As shown, the light emitting structure layer 140 is provided with a plurality of organic light emitting devices in the display area AA, and the organic light emitting devices include an anode 141, a light emitting layer 142 and a cathode 143 which are stacked in sequence. The anode 141 is formed on the second planarization layer 132, and is connected to the first transfer electrode 134 through a metal via provided in the second planarization layer 132. The light emitting structure layer 140 further includes a pixel definition layer 144, which is located on the side of the second planarization layer 132 away from the substrate layer 110, and the pixel definition layer 144 is provided with a plurality of pixel openings in the display area AA, and the pixel openings correspond to the organic light emitting devices one by one, and the pixel openings are used to expose the anode 141, and the light emitting layer 142 is located in the pixel openings.

[0116] A plurality of organic light-emitting devices are arranged in an array in the display area AA, and the anodes 141 of each organic light-emitting device are independent of each other, and the cathodes 143 of each organic light-emitting device are at least partially connected. One of the organic light-emitting devices can constitute a light-emitting sub-pixel, and the light-emitting sub-pixel is used to emit light of a single color, such as red light, green light or blue light. The light-emitting principle of the organic light-emitting device is: under the voltage drive of the thin film transistor 121, the anode 141 and the cathode 143 transmit holes and electrons respectively, and the electrons and holes meet in the light-emitting layer 142 to form excitons and excite the light-emitting molecules in the light-emitting layer 142, and emit light of the corresponding color through radiation relaxation. Radiative relaxation refers to the decay process in which a molecule returns to the ground state from a higher energy excited state through a relaxation process and emits photons.

[0117] like Fig.10 As shown, the pixel definition layer 144 extends from the display area AA to the bending area AC. Therefore, in the bending area AC, the display panel 10 includes a stacked substrate layer 110, a first planarization layer 131, a second planarization layer 132 and a pixel definition layer 144.

[0118] like Fig.10 As shown, the first sub-dam 171 may be a patterned structure formed on the second planarization layer 132 , and the second sub-dam 172 may be formed by overlapping the patterned structure of the first planarization layer 131 and the patterned structure of the second planarization layer 132 .

[0119] like Fig.11 As shown, the encapsulation layer 150 is located on the side of the light emitting structure layer 140 away from the substrate layer 110. The encapsulation layer 150 may also include an inorganic encapsulation layer 151. The inorganic encapsulation layer 151 may be located at the bottom of the organic encapsulation layer 152. Fig.10 As shown, the inorganic encapsulation layer 151 extends from the display area AA to the frame area AB and covers the first sub-dam 171 and the second sub-dam 172 on the side away from the substrate layer 110. The touch layer 200 can be directly formed on the encapsulation layer 150 by FMLOC technology.

[0120] In other embodiments of the present application, the structure of each film layer of the display substrate 100 can be adjusted according to actual needs. For example, in the encapsulation layer 150, the inorganic encapsulation layer 151 can be provided with two layers, and the organic encapsulation layer 152 is located between the two inorganic encapsulation layers 151. The present application does not limit this.

[0121] In other embodiments of the present application, the film structure of the display substrate 100 may also be different from that of the first embodiment, as long as the display function can be achieved, and the present application does not impose any limitation on this.

[0122] See also Fig.12 , Fig.12A top view of the first adapter hole 300 is shown. Fig.10 and Fig.12 As shown, the touch buffer layer 240 is provided with a sinking groove 241, which is located on a side of the first transfer hole 300 close to the display area AA and is connected to the first transfer hole 300, so that the first touch sub-line 211 enters the first transfer hole 300 after sinking through the sinking groove 241.

[0123] Specifically, Fig.10 As shown, the second touch line segment 220 is located between the first planarization layer 131 and the second planarization layer 132. The second touch line segment 220 and the first transfer electrode 134 are made of the same material and the same layer. The second touch line segment 220 extends into the first transfer hole 300. The first transfer hole 300 is located between the second sub-dam 172 and the bending area AC. The first transfer hole 300 is a metal via hole set in the second planarization layer 132. The first transfer hole 300 passes through the second planarization layer 132 and is connected to the sinking groove 241. Therefore, the second touch line segment 220 can be overlapped with the first touch sub-line 211.

[0124] In the embodiment of the present application, by providing the sinking groove 241, it is possible to avoid the touch buffer layer 240 being flush with the boundary of the second planarization layer 132, and the first touch sub-line 211 can first sink to the bottom of the sinking groove 241, and then overlap with the second touch line segment 220 through the first transfer hole 300, that is, the first touch sub-line 211 sinks in a multi-step manner and then overlaps with the second touch line segment 220, so that the depth of the first transfer hole 300 can be reduced, thereby effectively improving the breakage of the first touch line segment 210.

[0125] Specifically, considering that the thickness of the organic material is relatively thick, after the touch buffer layer 240 is replaced with the organic material, the thickness of the touch buffer layer 240 increases, so that on the side close to the bending area AC, when the touch buffer layer 240 is flush with the boundary of the second planarization layer 132, the film layer step difference is large, the first transfer hole 300 is deep, and the first touch sub-line 211 is prone to breakage. Therefore, in the embodiment of the present application, by providing the sinking groove 241, it is possible to avoid the touch buffer layer 240 being flush with the boundary of the second planarization layer 132, so that the depth of the first transfer hole 300 is reduced.

[0126] See also Fig.13 , Fig.13 Another cross-sectional view of the display panel of the first embodiment of the present application at the DD portion is shown. Fig.13 In the embodiment shown, Fig.11The embodiment shown is different in that a third planarization layer 133 is further provided on the side of the second planarization layer 132 facing away from the substrate layer 110, a second switching electrode 135 is provided between the second planarization layer 132 and the third planarization layer 133, and the second switching electrode 135 is connected to the first switching electrode 134 through a metal via provided on the second planarization layer 132. An anode 141 is formed on the third planarization layer 133, and the anode 141 is connected to the second switching electrode 135 through a metal via provided in the third planarization layer 133.

[0127] like Fig.13 As shown, the display substrate 100 further includes a substrate barrier layer 160, which is located on the side of the encapsulation layer 150 away from the substrate layer 110 and is used to block water oxygen and alkaline ions from entering the display substrate 100. The touch control layer 200 can be formed on the substrate barrier layer 160.

[0128] Also, see Fig.14 , Fig.14 Another structural schematic diagram of the first transfer hole 300 is shown. Fig.14 As shown, Fig.10 The difference between the illustrated embodiment is that the third planarization layer 133 and the substrate barrier layer 160 extend from the display area AA to the frame area AB, and the first transfer hole 300 is a metal via provided in the substrate barrier layer 160, the third planarization layer 133 and the second planarization layer 132. The first transfer hole 300 passes through the second planarization layer 132, the third planarization layer 133 and the substrate barrier layer 160 in sequence and then communicates with the sinking groove 241. The second touch line segment 220 extends into the first transfer hole 300, and a transfer line 301 is further provided in the first transfer hole 300. The transfer line 301 is located on the side of the second touch line segment 220 away from the substrate layer 110. The first touch sub-line 211 overlaps with the transfer line 301 after entering the first transfer hole 300, and the transfer line 301 overlaps with the second touch line segment 220, thereby allowing more signal lines to pass through.

[0129] like Figure 5 As shown, in the embodiment of the first aspect of the present application, the transition area AB1 includes a first fan-out area FA1, the binding area AD also includes a second fan-out area FA2, a circuit test area CT, a third fan-out area FA3 and an integrated circuit area IC, and the second fan-out area FA2, the circuit test area CT, the third fan-out area FA3 and the integrated circuit area IC are arranged in sequence along a direction away from the bending area AC. The display substrate 100 also includes a first power line VSS and a second power line VDD, and the first power line VSS and the second power line VDD extend from the frame area AB to the binding area AD and are connected to the flexible circuit board FPC.

[0130] Then, the display panel 10 according to the second embodiment of the present application is described in detail.

[0131] In addition to having Figures 3 to 5 Specifically, the display panel 10 of the second aspect of the present application is different from the display panel 10 of the first aspect of the present application in that the display panel 10 has a Figure 5 The structure of the B part shown is different. Figures 15 to 18 , Figures 15 to 18 FIG. 1 shows an enlarged view of the structure of various embodiments of the display panel 10 in part B of the second embodiment of the present application. Figures 15 to 18 As shown, unlike the display panel 10 of the first embodiment, in the second embodiment of the present application, on a projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, the line width of a portion of the second touch sub-line 212 of at least part of the first touch line segment 210 close to the bending area AC is narrowed to form a narrow line portion 2121. The boundary of the isolation dam 170 away from the display area AA is the second boundary, and along the direction away from the display area AA, the starting position of the narrow line portion 2121 is located at the second boundary or on the side of the second boundary close to the display area AA.

[0132] In the embodiment of the present application, a narrow line portion 2121 is set for the second touch sub-line 212 of at least part of the first touch line segment 210, and the starting position of the narrow line portion 2121 is set on the second boundary or on the side of the second boundary close to the display area AA, that is, along the direction away from the display area AA, before crossing the boundary of the isolation dam 170 close to the bending area AC, the line width of part of the second touch sub-line 212 becomes narrower, so that in the area where the touch buffer layer 240 and the touch insulation layer 250 are thicker, the spacing between at least part of the second touch sub-line 212 is increased, which is beneficial to improve the short circuit of the second touch sub-line 212 caused by incomplete etching, thereby improving the touch performance.

[0133] Further, see Fig.19 , Fig.19 The display panel 10 of the second embodiment of the present application is Figure 5 The cross-sectional view of the CC section is shown, and Fig.10 What is different from the illustrated embodiment is that in the embodiment of the second aspect of the present application, at least a portion of the second touch sub-lines 212 of the first touch line segments 210 cross the isolation dam 170 .

[0134] Furthermore, if Fig.19As shown, the connection hole 251 is located on the side of the first transfer hole 300 close to the display area AA, the first touch sub-line 211 and the second touch sub-line 212 are only overlapped through the connection hole 251, and the second touch sub-line 212 does not enter the first transfer hole 300. Therefore, the second touch sub-line 212 can be prevented from breaking in the first transfer hole 300 due to the deeper first transfer hole 300.

[0135] In a preferred embodiment, the connection hole 251 may be located at a side of the first sub-dam 171 close to the display area AA, so that the first transfer hole 300 may avoid a location where the touch buffer layer 240 has a thicker film.

[0136] In an embodiment of the second aspect of the present application, Fig.19 As shown, the display substrate 100 includes an encapsulation layer 150, the encapsulation layer 150 includes an organic encapsulation layer 152, the organic encapsulation layer 152 has a certain fluidity, and the isolation dam 170 is used to prevent the organic encapsulation layer 152 from extending in a direction away from the display area AA. The isolation dam 170 may include a first sub-dam 171 and a second sub-dam 172, and the first sub-dam 171 is located between the display area AA and the second sub-dam 172.

[0137] exist Fig.15 In the illustrated embodiment, in the transition area AB1, each second touch sub-line 212 has a narrow line portion 2121. Therefore, in the area where the touch insulating layer 250 and the touch buffer layer 240 are thicker, the spacing between adjacent second touch sub-lines 212 is increased.

[0138] Furthermore, along the direction away from the display area AA, the boundary of the first sub-dam 171 away from the display area AA is the first boundary L1, the starting position of the narrow line portion 2121 is located on the side of the first boundary L1 close to the display area AA, and the boundaries on both sides of the narrow line portion 2121 in the line width direction are both within the range of the first touch sub-line 211.

[0139] In the embodiment of the present application, each second touch sub-line 212 is provided with a narrow line portion 2121, and the starting position of the narrow line portion 2121 is located on the side of the first boundary L1 close to the display area AA, and the two side boundaries of the narrow line portion 2121 in the line width direction are both located within the range of the first touch sub-line 211, that is, the line width of the narrow line portion 2121 is smaller than the first touch sub-line 211, so that in the area where the touch insulation layer 250 and the touch buffer layer 240 are thicker, the distance between each second touch sub-line 212 is greater than the distance between each first touch sub-line 211, which is beneficial to improving the short circuit of the second touch sub-line 212 caused by incomplete etching.

[0140] Furthermore, the narrow line portion 2121 extends from the starting position to the side of the second sub-dam 172 close to the bending area AC, so that the first touch line segment 210 can maintain a double-layer routing, thereby improving the short circuit of the second touch sub-line 212 and improving the transmission efficiency.

[0141] exist Fig.16 In the embodiment shown, Fig.15 The difference of the illustrated embodiment is that, in the projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, along the direction away from the display area AA, the starting position of the narrow line portion 2121 coincides with the boundary of the organic encapsulation layer 152. By coinciding the starting position of the narrow line portion 2121 with the boundary of the organic encapsulation layer 152, the distance between the second touch sub-lines 212 in the organic groove region that may appear between the organic encapsulation layer 152 and the first sub-dam 171 is increased, thereby improving the short circuit of the second touch sub-lines 212 caused by incomplete etching.

[0142] In other embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel 10 , in the transition area AB1 , along a direction away from the display area AA, the starting position of the narrow line portion 2121 may also be located within the range of the organic encapsulation layer 152 .

[0143] exist Fig.17 In the embodiment shown, Fig.15 The difference of the illustrated embodiment is that, on a projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, along the direction away from the display area AA, the starting position of the narrow line portion 2121 is located at the first boundary L1, that is, the starting position of the narrow line portion 2121 coincides with the first boundary L1. Since, under ideal conditions, there is no organic groove between the organic encapsulation layer 152 and the first sub-dam 171, it is only necessary to increase the spacing between the second touch sub-lines 212 on the side of the first sub-dam 171 close to the bending area AC, so as to improve the short circuit situation in the case of incomplete etching.

[0144] In other embodiments of the present application, on a projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, along the direction away from the display area AA, the starting position of the narrow line portion 2121 may also be located within the range of the first sub-dam 171, that is, the starting position of the narrow line portion 2121 is located between the boundary of the first sub-dam 171 close to the display area AA and the first boundary L1.

[0145] In other embodiments of the present application, in the transition area AB1, only a portion of the second touch sub-lines 212 has a narrowed line width to form a narrow line portion 2121, and the line width of another portion of the second touch sub-lines 212 remains unchanged. In a specific embodiment, in an area where incomplete etching is likely to occur, two adjacent second touch sub-lines 212, one of which has a narrowed line width to form a narrow line portion 2121, and the line width of the other second touch sub-line 212 remains unchanged, thereby also increasing the spacing between the two adjacent second touch sub-lines 212. The present application does not limit the number of second touch sub-lines 212 that have a narrowed line width.

[0146] exist Fig.18 In the embodiment shown, Fig.15 The difference of the illustrated embodiment is that, on a projection plane perpendicular to the thickness direction of the display panel 10, in the transition area AB1, along the direction away from the display area AA, at least part of the second touch sub-lines 212 of the first touch line segments 210 at least terminate at the first sub-dam 171. Therefore, on the side of the first sub-dam 171 close to the bending area AC, that is, in the area where the touch buffer layer 240 and the touch insulating layer 250 are thicker, the number of the second touch sub-lines 212 is reduced, which is conducive to further increasing the distance between the second touch sub-lines 212, and further improving the short circuit of the second touch sub-lines 212 in the case of incomplete etching.

[0147] Further, in the transition area AB1, of the two adjacent second touch sub-lines 212, the boundary of one of the second touch sub-lines 212 close to the bending area AC is located on the side of the first sub-dam 171 close to the display area AA, and no narrow line portion 2121 is formed, that is, the line width in the transition area AB1 remains unchanged, and the other second touch sub-line 212 crosses the second sub-dam 172 in a direction away from the display area AA, and the line width becomes narrower to form a narrow line portion 2121. Therefore, in the area where incomplete etching is easy, the spacing between every two second touch sub-lines 212 can be further increased.

[0148] Finally, the display panel 10 of the third embodiment of the present application is described in detail.

[0149] In addition to having Figures 3 to 5 The display panel 10 of the third aspect of the present application has other improvements. Specifically, the display panel 10 of the third aspect of the present application has Figure 5 The structure at CC shown can be as follows Fig.10As shown, in the third embodiment of the present application, the touch signal line 201 includes a first touch line segment 210 located in the border area AB and a second touch line segment 220 located at least in the bending area AC, and a first transfer hole 300 is provided in the transition area AB1, and the second touch line segment 220 is overlapped with the first touch line segment 210 through the first transfer hole 300.

[0150] like Fig.10 and Fig.12 As shown, the touch layer 200 also includes a touch buffer layer 240, which is located at least between the first touch line segment 210 and the display substrate 100; the touch buffer layer 240 is provided with a sinking groove 241, which is located on the side of the first transfer hole 300 close to the display area AA and is connected to the first transfer hole 300, so that the first touch line segment 210 enters the first transfer hole 300 after sinking through the sinking groove 241.

[0151] In the embodiment of the present application, a sinking groove 241 is provided to prevent the touch buffer layer 240 from being flush with the boundary of the organic film layer of the display substrate 100. The first touch line segment 210 can first sink to the bottom of the sinking groove 241 and then overlap with the second touch line segment 220 through the first transfer hole 300. That is, the first touch line segment 210 sinks in a multi-step manner and then overlaps with the second touch line segment 220. In this way, the depth of the first transfer hole 300 can be reduced, thereby effectively improving the breakage of the first touch line segment 210 caused by the greater depth of the first transfer hole 300.

[0152] In an embodiment of the third aspect of the present application, the touch layer 200 further includes a touch insulating layer 250. The first touch line segment 210 may include a first touch sub-line 211 and a second touch sub-line 212, that is, the first touch line segment 210 uses a double-layer metal routing, wherein the first touch sub-line 211 is located in the first metal layer 270, and the second touch sub-line 212 is located in the second metal layer 280. A plurality of connection holes 251 may be provided on the touch insulating layer 250, and the second touch sub-line 212 may be overlapped with the first touch sub-line 211 through the plurality of connection holes 251, thereby realizing the parallel connection of the first touch sub-line 211 and the second touch sub-line 212, which is beneficial to reducing the line resistance.

[0153] Furthermore, the connection hole 251 is located on a side of the first transfer hole 300 close to the display area AA.

[0154] As a comparison, Figure 2 As shown, in the related art, the first touch sub-line 927 and the second touch sub-line 928 are both extended to the transfer hole 929, at which the second touch sub-line 928 overlaps with the first touch sub-line 927, and the first touch sub-line 927 overlaps with the second touch line segment 930. In the embodiment of the present application, Fig.10As shown, the connection hole 251 is located on the side of the first transfer hole 300 close to the display area AA, and the second touch sub-line 212 and the first touch sub-line 211 are overlapped only in the connection hole 251, and the second touch sub-line 212 does not enter the first transfer hole 300. Thus, the second touch sub-line 212 can be prevented from being broken in the first transfer hole 300 due to the deepness of the first transfer hole 300.

[0155] In the embodiment of the present application, the touch buffer layer 240 and the touch insulating layer 250 are made of organic materials, thereby improving the bending performance of the touch buffer layer 240 and the touch insulating layer 250 and improving the fracture of the display panel 10 during the bending process.

[0156] Furthermore, the display panel 10 of the third aspect of the present application is Figure 5 The structure of the B part can be as shown Figures 6 to 9 as well as Figures 15 to 18 As shown in any one of the embodiments, this application will not be repeated here.

[0157] Furthermore, the display panel 10 of the third aspect of the present application is Figure 5 The structure at DD is shown as Fig.11 As shown, this application will not be repeated here.

[0158] In addition, the display panel 10 of the third aspect of the present application is Figure 3 The structure diagram at DD shown can also be Fig.13 As shown, the structure of the first transfer hole 300 can be as follows Fig.14 As shown, this application will not be repeated here.

[0159] An embodiment of a fourth aspect of the present application provides a display device, comprising the display panel 10 in any embodiment of the first aspect, the second aspect or the third aspect.

[0160] In the display device of the embodiment of the present application, by adopting the display panel 10 in any embodiment of the first aspect or the second aspect, at least in the area where the touch buffer layer 240 and the touch insulating layer 250 are thicker, the spacing between each second touch sub-line 212 can be increased, or each second touch sub-line 212 can completely avoid the area that is prone to incomplete etching, which is beneficial to improve the short circuit of the second touch sub-line 212 and improve the touch performance. By adopting the display panel 10 in any embodiment of the third aspect, the first touch line segment 210 can first sink to the bottom of the sinking groove 241, and then overlap with the second touch line segment 220 through the first transfer hole 300, that is, the first touch line segment 210 sinks in a multi-step manner and overlaps with the second touch line segment 220, so that the depth of the first transfer hole 300 can be reduced, thereby effectively improving the breakage of the first touch line segment 210.

[0161] 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 sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0162] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0163] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: It has a display area and a non-display area, the non-display area includes a frame area and a bending area, the frame area surrounds the display area, and the bending area is located at a side of the frame area away from the display area; The frame area includes a transition area, and the transition area is located between the display area and the bending area; The display panel comprises: A display substrate, comprising an isolation dam, wherein the isolation dam is located in the frame area and is arranged around the display area; A touch layer is arranged on one side of the display substrate, and includes a plurality of touch signal lines, each of the touch signal lines includes a first touch line segment located in the frame area, and the first touch line segment includes a first touch sub-line and a second touch sub-line; the touch layer also includes a touch buffer layer and a touch insulating layer, the touch buffer layer is at least located between the first touch sub-line and the display substrate, and the touch insulating layer is at least located between the first touch sub-line and the second touch sub-line; The first touch sub-line and the second touch sub-line of each touch signal line are overlapped; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, at least part of the second touch sub-line segments of the first touch line at least terminate at the isolation dam.

2. The display panel according to claim 1, characterized in that: The isolation dam includes a first sub-dam and a second sub-dam, the first sub-dam is located between the display area and the second sub-dam; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, at least part of the second touch sub-lines of the first touch line segments at least terminate at the first sub-dam in a direction away from the display area.

3. The display panel according to claim 2, characterized in that: In the transition area, at least a portion of the second touch sub-lines have boundaries close to the bending area located on a side of the first sub-dam close to the display area.

4. The display panel according to claim 3, characterized in that: In the transition area, boundaries of each of the second touch sub-lines close to the bending area are located on a side of the first sub-dam close to the display area.

5. The display panel according to claim 2, characterized in that: On a projection plane perpendicular to the thickness direction of the display panel, in the transition area, a portion of the second touch sub-lines of the first touch line segments at least terminate at the first sub-dam in a direction away from the display area, and another portion of the second touch sub-lines at least cross over a side of the first sub-dam close to the display area in a direction away from the display area.

6. The display panel according to claim 5, characterized in that: On a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, among two adjacent second touch sub-lines, the boundary of one of the second touch sub-lines close to the bending zone is located on the side of the first sub-dam close to the display area, and the other second touch sub-line at least crosses the first sub-dam in a direction away from the display area.

7. The display panel according to claim 1, characterized in that: The display substrate also includes an encapsulation layer, which includes an organic encapsulation layer, and the isolation dam is used to prevent the organic encapsulation layer from extending in a direction away from the display area; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, at least part of the second touch sub-line of the first touch line segment ends within the range of the organic encapsulation layer.

8. The display panel according to claim 2, characterized in that: On a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, the line width of a portion of the second touch sub-line of at least part of the first touch line segment close to the bending zone becomes narrower to form a narrow line portion; the boundary of the first sub-dam away from the display area is the first boundary, and along the direction away from the display area, the starting position of the narrow line portion is located at the first boundary or on a side of the first boundary close to the display area, and both side boundaries of the narrow line portion in the line width direction are located within the range of the first touch sub-line.

9. The display panel according to claim 1, characterized in that: The transition zone is provided with a first transfer hole, and the first transfer hole is located between the isolation dam and the bending zone; The touch signal line further includes a second touch line segment, the second touch line segment is at least located in the bending area, and the second touch line segment is overlapped with the first touch sub-line through the first transfer hole; The touch buffer layer is provided with a sinking groove, which is located on a side of the first transfer hole close to the display area and is connected to the first transfer hole, so that the first touch sub-line enters the first transfer hole after sinking through the sinking groove.

10. The display panel according to claim 9, characterized in that: In the display area, the display substrate includes a driving layer, a first planarization layer, a second planarization layer, a third planarization layer and a light emitting structure layer which are sequentially stacked in a direction close to the touch layer; The driving layer is provided with a plurality of thin film transistors, and the thin film transistors include drain electrodes; the light emitting structure layer is provided with a plurality of organic light emitting devices, and the organic light emitting devices include anode electrodes; a first switching electrode is provided between the first planarization layer and the second planarization layer, and the first switching electrode is connected to the drain electrode and the anode electrode respectively; The first planarization layer, the second planarization layer and the third planarization layer extend from the display area to the frame area, the second touch line segment and the first transfer electrode are arranged in the same layer, and the first transfer hole passes through the second planarization layer and the third planarization layer and then communicates with the sinking groove.

11. The display panel according to claim 9, characterized in that: The touch insulating layer is provided with a plurality of connection holes, through which the first touch sub-line and the second touch sub-line are overlapped, and the connection holes are located on a side of the first transfer hole close to the display area.

12. The display panel according to claim 11, characterized in that: The connection hole is located on a side of the isolation dam close to the display area.

13. The display panel according to claim 1, characterized in that: The touch buffer layer and the touch insulating layer are made of organic materials.

14. A display panel, characterized in that: It has a display area and a non-display area, the non-display area includes a frame area and a bending area, the frame area surrounds the display area, and the bending area is located at a side of the frame area away from the display area; The frame area includes a transition area, and the transition area is located between the display area and the bending area; The display panel comprises: A display substrate, comprising an isolation dam, wherein the isolation dam is located in the frame area and is arranged around the display area; A touch layer is arranged on one side of the display substrate, and includes a plurality of touch signal lines, each of the touch signal lines includes a first touch line segment located in the frame area, and the first touch line segment includes a first touch sub-line and a second touch sub-line; the touch layer also includes a touch buffer layer and a touch insulating layer, the touch buffer layer is at least located between the first touch sub-line and the display substrate, and the touch insulating layer is at least located between the first touch sub-line and the second touch sub-line; The first touch sub-line and the second touch sub-line of each touch signal line are overlapped; on a projection plane perpendicular to the thickness direction of the display panel, in the transition zone, a line width of a portion of the second touch sub-line of at least part of the first touch line segments close to the bending zone becomes narrower to form a narrow line portion; the boundary of the isolation dam away from the display area is the second boundary, and along the direction away from the display area, the starting position of the narrow line portion is located at the second boundary or on the side of the second boundary close to the display area.

15. The display panel according to claim 14, characterized in that: The isolation dam includes a first sub-dam and a second sub-dam, the first sub-dam is located between the display area and the second sub-dam; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, the boundary of the first sub-dam away from the display area is the first boundary; the starting position of the narrow line portion is located at the first boundary or at a side of the first boundary close to the display area, and both side boundaries of the narrow line portion in the line width direction are located within the range of the first touch sub-line.

16. The display panel according to claim 15, characterized in that: On a projection plane perpendicular to the thickness direction of the display panel, in the transition region, along a direction away from the display region, a starting position of the narrow line portion is located on a side of the first sub-dam close to the display region.

17. The display panel according to claim 14, characterized in that: In the transition region, each of the second touch sub-lines is formed with the narrow line portion.

18. The display panel according to claim 14, characterized in that: The display substrate also includes an encapsulation layer, which includes an organic encapsulation layer, and the isolation dam is used to prevent the organic encapsulation layer from extending in a direction away from the display area; on a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along the direction away from the display area, the starting position of the narrow line portion is located within the range of the organic encapsulation layer or coincides with the boundary of the organic encapsulation layer, and both side boundaries of the narrow line portion in the line width direction are located within the range of the first touch sub-line.

19. The display panel according to claim 14, characterized in that: On a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along a direction away from the display area, at least part of the second touch sub-lines of the first touch line segments at least terminate at the isolation dam.

20. The display panel according to claim 14, characterized in that: The transition zone is provided with a first transfer hole, and the first transfer hole is located between the isolation dam and the bending zone; The touch signal line further includes a second touch line segment, the second touch line segment is located in the bending area, and the second touch line segment is overlapped with the first touch sub-line through the first transfer hole; The touch buffer layer is provided with a sinking groove, which is located on a side of the first transfer hole close to the display area and is connected to the first transfer hole, so that the first touch sub-line enters the first transfer hole after sinking through the sinking groove.

21. The display panel according to claim 20, characterized in that: In the display area, the display substrate includes a driving layer, a first planarization layer, a second planarization layer, a third planarization layer and a light emitting structure layer which are sequentially stacked in a direction close to the touch layer; The driving layer is provided with a plurality of thin film transistors, and the thin film transistors include drain electrodes; the light emitting structure layer is provided with a plurality of organic light emitting devices, and the organic light emitting devices include anode electrodes; a first switching electrode is provided between the first planarization layer and the second planarization layer, and the first switching electrode is connected to the drain electrode and the anode electrode respectively; The first planarization layer, the second planarization layer and the third planarization layer extend from the display area to the frame area, the second touch line segment and the first transfer electrode are arranged in the same layer, and the first transfer hole passes through the second planarization layer and the third planarization layer and then communicates with the sinking groove.

22. The display panel according to claim 20, characterized in that: The touch insulating layer is provided with a plurality of connection holes, through which the first touch sub-line and the second touch sub-line are overlapped, and the connection holes are located on a side of the first transfer hole close to the display area.

23. The display panel according to claim 22, characterized in that: The connection hole is located on a side of the isolation dam close to the display area.

24. The display panel according to claim 14, characterized in that: The touch buffer layer and the touch insulating layer are made of organic materials.

25. A display panel, characterized in that: It has a display area and a non-display area, the non-display area includes a frame area and a bending area, the frame area surrounds the display area, and the bending area is located on a side of the frame area away from the display area; the frame area includes a transition area, and the transition area is located between the display area and the bending area; The display panel comprises: Display substrate; A touch layer, arranged on one side of the display substrate, comprising a plurality of touch signal lines, wherein the touch signal line comprises a first touch line segment located in the frame area and a second touch line segment located at least in the bending area, the transition area is provided with a first transfer hole, and the second touch line segment is overlapped with the first touch line segment through the first transfer hole; The touch layer also includes a touch buffer layer, which is located at least between the first touch line segment and the display substrate; the touch buffer layer is provided with a sinking groove, which is located on a side of the first transfer hole close to the display area and is connected to the first transfer hole, so that the first touch line segment enters the first transfer hole after sinking through the sinking groove.

26. The display panel according to claim 25, characterized in that: In the display area, the display substrate includes a driving layer, a first planarization layer, a second planarization layer, a third planarization layer and a light emitting structure layer which are sequentially stacked in a direction close to the touch layer; The driving layer is provided with a plurality of thin film transistors, and the thin film transistors include drain electrodes; the light emitting structure layer is provided with a plurality of organic light emitting devices, and the organic light emitting devices include anode electrodes; a first switching electrode is provided between the first planarization layer and the second planarization layer, and the first switching electrode is connected to the drain electrode and the anode electrode respectively; The first planarization layer, the second planarization layer and the third planarization layer extend from the display area to the frame area, the second touch line segment and the first transfer electrode are arranged in the same layer, and the first transfer hole passes through the second planarization layer and the third planarization layer and then communicates with the sinking groove.

27. The display panel according to claim 25, characterized in that: The first touch line segment includes a first touch sub-line and a second touch sub-line, and the second touch sub-line is located at a side of the first touch sub-line away from the touch buffer layer; The touch layer also includes a touch insulation layer, which is located at least between the first touch sub-line and the second touch sub-line; a plurality of connection holes are provided on the touch insulation layer, and the connection holes are located on a side of the first transfer hole close to the display area, and the first touch sub-line and the second touch sub-line are overlapped through the connection holes; the first touch sub-line is overlapped with the second touch line segment through the first transfer hole.

28. The display panel according to claim 27, characterized in that: The touch buffer layer and the touch insulating layer are made of organic materials.

29. The display panel according to claim 27, characterized in that: The display substrate comprises an isolation dam, wherein the isolation dam is located in the frame area and is arranged around the display area; On a projection plane perpendicular to the thickness direction of the display panel, in the transition area, along a direction away from the display area, at least part of the second touch sub-lines of the first touch line segments at least terminate at the isolation dam; And / or, the line width of a portion of the second touch sub-line of at least part of the first touch line segment close to the bending area becomes narrower to form a narrow line portion, the boundary of the isolation dam away from the display area is the second boundary, and along the direction away from the display area, the starting position of the narrow line portion is located at the second boundary or on the side of the second boundary close to the display area.

30. The display panel according to claim 29, characterized in that: The connection hole is located on a side of the isolation dam close to the display area.

31. A display device, characterized in that: A display panel comprising any one of claims 1-30.

Images