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 area and a non-display area adjacent to the display area, and the display panel comprises a substrate; the first conductive layer is arranged on one side of the substrate and located in the non-display area; the second conducting layer is at least partially arranged on the side, away from the substrate, of the first conducting layer, and the second conducting layer comprises a first open groove; the auxiliary connecting layer is arranged on the side, away from the substrate, of the second conducting layer, at least part of the auxiliary connecting layer is located in the first open groove, and the auxiliary connecting layer makes contact with the part, exposed out of the first open groove, of the first conducting layer and the side face, where the first open groove is formed, of the second conducting layer. The possibility of stripping of the auxiliary connecting layer is reduced, and the use performance of the display panel is improved.

Description

Technical Field

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

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

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

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

[0005] An embodiment of one aspect of the present application provides a display panel, including a display area and a non-display area adjacent to the display area, the display panel including: a substrate; a first conductive layer, provided on one side of the substrate and located in the non-display area; a second conductive layer, at least partially provided on a side of the first conductive layer away from the substrate, the second conductive layer including a first groove; an auxiliary connection layer, provided on a side of the second conductive layer away from the substrate, at least partially located in the first groove, and in contact with a portion of the first conductive layer exposed to the first groove and a side of the second conductive layer forming the first groove.

[0006] According to any embodiment described in one aspect of the present application, the first conductive layer includes a second groove; the second conductive layer includes a first part and a second part connected to each other, the first part is arranged on the side of the first conductive layer away from the substrate, and the second part is sunken in the second groove, and the second groove and the first groove do not overlap in a direction perpendicular to the plane of the substrate; preferably, the auxiliary connection layer includes a third part and a fourth part connected to each other, the third part is arranged on the surface of the second conductive layer away from the substrate, a part of the third part is sunken corresponding to the second part, and the fourth part is located in the first groove; preferably, the fourth part includes a third sub-portion and a fourth sub-portion sunken in the first groove, the third sub-portion is in contact with the first conductive layer, and the fourth sub-portion covers the side of the second conductive layer forming the first groove.

[0007] According to any embodiment described in one aspect of the present application, the second part includes a first sub-portion and a second sub-portion recessed in the second groove, the extension direction of the first sub-portion is parallel to the plane direction of the substrate, and the extension direction of the second sub-portion intersects with the extension direction of the first sub-portion; the auxiliary connection layer covers the first sub-portion and the second sub-portion.

[0008] According to any embodiment described in one aspect of the present application, in the display area, the display panel also includes a light-emitting structure arranged on one side of the substrate, and along the direction away from the substrate, the light-emitting structure includes a first electrode layer, a light-emitting layer and a second electrode layer which are stacked; the auxiliary connection layer and the first electrode layer are arranged on the same layer and are electrically connected to the first electrode layer; preferably, the material of the auxiliary connection layer is the same as that of the first electrode layer.

[0009] According to any embodiment described in one aspect of the present application, the second grooves and the first grooves are respectively arranged in a row along the first direction, and the second grooves and the first grooves are arranged at intervals along the second direction, the first direction and the second direction are both parallel to the plane where the substrate is located, and the first direction and the second direction intersect; preferably, the second grooves and the first grooves do not overlap along the second direction.

[0010] According to any embodiment described in one aspect of the present application, in a direction perpendicular to the direction of the substrate, the cross-sectional shape of the second groove is polygonal or curved; and / or, in a direction perpendicular to the direction of the substrate, the cross-sectional shape of the first groove is polygonal or curved.

[0011] According to any embodiment described in one aspect of the present application, in a direction perpendicular to the direction of the substrate, the cross-sectional shape of the second groove is a trapezoid, and the angle between the base and the waist of the trapezoid is greater than 90° and less than or equal to 135°; and / or, in a direction perpendicular to the direction of the substrate, the cross-sectional shape of the first groove is a trapezoid, and the angle between the base and the waist of the trapezoid is greater than 90° and less than or equal to 135°.

[0012] According to any embodiment described in one aspect of the present application, the non-display area includes an arc corner area and a straight edge area connected to the arc corner area; the second groove and the first groove are at least located in the arc corner area; preferably, the non-display area includes four arc corner areas and four straight edge areas, and the arc corner areas and the straight edge areas are alternately arranged along the circumference of the display panel.

[0013] According to any embodiment described in one aspect of the present application, the materials of the first conductive layer and the second conductive layer both include metal; preferably, the materials of the first conductive layer and the second conductive layer include at least one of titanium, aluminum, and molybdenum.

[0014] According to yet another aspect of the present application, a display device is provided, comprising the display panel in any of the above embodiments.

[0015] In the display panel provided in the embodiment of the present application, it includes a substrate, a first conductive layer, a second conductive layer and an auxiliary connection layer. The second conductive layer includes a first groove. The fourth part of the auxiliary connection layer can be directly arranged in the first groove to contact the part of the first conductive layer exposed by the first groove, and to contact the side of the second conductive layer corresponding to the first groove, so as to increase the contact area between the auxiliary connection layer and the first conductive layer and the second conductive layer, improve the reliability of the combination of the first conductive layer, the second conductive layer and the auxiliary connection layer, reduce the possibility of peeling of the auxiliary connection layer, and improve the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0017] Figure 1 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0018] Figure 2 In one example Figure 1 Sectional view at the middle BB;

[0019] Figure 3 In another example Figure 1 Sectional view at the middle BB;

[0020] Figure 4 In another example Figure 1 Sectional view at the middle BB;

[0021] Figure 5 In one example Figure 1 Sectional view at CC;

[0022] Figure 6 In one example Figure 1 Partial schematic diagram at point D in the middle.

[0023] Description of reference numerals:

[0024] 1. substrate; 2. first conductive layer; 3. second conductive layer; 31. first part; 32. second part; 321. first sub-part; 322. second sub-part; 4. auxiliary connection layer; 41. third part; 42. fourth part; 421. third sub-part; 422. fourth sub-part;

[0025] 5. Light-emitting structure; 51. First electrode layer; 52. Light-emitting layer; 53. Second electrode layer;

[0026] L-transition connection; S-source; D-drain; G-gate; Z-active layer; R-storage capacitor; R1-first electrode; R2-second electrode; K1-second slot; K2-first slot; X, first direction; Y, second direction; AA, display area; NA, non-display area; BA, arc angle area; ZA, straight edge area. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0028] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] In order to better understand this application, Figures 1 to 6 The display panel and the display device according to the embodiments of the present application are described in detail.

[0031] See also Figure 1 to Figure 2 The present application provides a display panel, including a display area AA and a non-display area NA adjacent to the display area AA, the display panel including: a substrate 1; a first conductive layer, provided on one side of the substrate and located in the non-display area; a second conductive layer, at least partially provided on a side of the first conductive layer away from the substrate, the second conductive layer including a first groove; an auxiliary connection layer, provided on a side of the second conductive layer away from the substrate and in the first groove, the auxiliary connection layer and the first conductive layer exposed by the first groove and the side of the second conductive layer corresponding to the first groove are in contact.

[0032] The display panel provided by the embodiment of the present invention includes a substrate 1, a first conductive layer 2, a second conductive layer 3 and an auxiliary connection layer 4, the second conductive layer 3 includes a first groove K1, and the fourth part 42 of the auxiliary connection layer 4 can be directly arranged on the first groove K1 to contact the part of the first conductive layer 2 exposed by the first groove K1, and contact the side of the second conductive layer 3 corresponding to the first groove K1, so as to increase the contact area between the auxiliary connection layer 4 and the first conductive layer 2 and the second conductive layer 3, improve the reliability of the combination of the first conductive layer 2, the second conductive layer 3 and the auxiliary connection layer 4, reduce the possibility of peeling of the auxiliary connection layer 4, and improve the performance of the display panel.

[0033] In this embodiment, the auxiliary connection layer 4 can be electrically connected to the light-emitting structure 5, touch layer and other functional layers located in the display area AA to provide electrical signals to the light-emitting structure 5, touch layer and other functional layers, and the first conductive layer 2 and the second conductive layer 3 can be used to electrically connect to components that provide signals such as circuit boards and chips.

[0034] See also Figure 3 In some optional embodiments, the first conductive layer 2 includes a second groove K2, and the second conductive layer 3 includes a first part 31 and a second part 32 connected to each other. The first part 31 is arranged on the side of the first conductive layer 2 facing away from the substrate 1, and the second part 32 is sunken in the second groove K2. In a direction perpendicular to the plane where the substrate 1 is located, the first groove K1 and the second groove K2 do not overlap.

[0035] It should be noted that due to the existence of the second groove K2 and the first groove K1, the auxiliary connection layer 4 will be sunken in the parts corresponding to the second groove K2 and the first groove K1, respectively, so as to increase the contact area between the second conductive layer 3 and the auxiliary connection layer 4 at the second groove K2, and increase the contact area between the first conductive layer 2 and the auxiliary connection layer 4 at the first groove K1, thereby improving the stability of the auxiliary connection layer 4 and avoiding the problem of film peeling between the auxiliary connection layer 4 and the film layer located thereunder.

[0036] In a direction perpendicular to the plane of the substrate 1 , the first slot K1 and the second slot K2 do not overlap, that is, the second slot K2 and the first slot K1 are staggered to avoid mutual interference, and the existing space can be reused without occupying additional space, thereby improving the performance of the display panel.

[0037] In this embodiment, the second slot K2 and the first slot K1 are respectively formed in the first conductive layer 2 and the second conductive layer 3 to avoid the problem of insufficient structural strength caused by forming slots on a single film layer.

[0038] Optionally, the auxiliary connection layer 4 includes a third part 41 and a fourth part 42 connected to each other, the third part 41 is arranged on the surface of the second conductive layer 3 facing away from the substrate 1, part of the third part 41 is recessed corresponding to the second part 32, and the fourth part 42 is located in the first groove K1.

[0039] Part of the third portion 41 of the auxiliary connection layer 4 is recessed corresponding to the second portion 32 , and part of the third portion 41 is disposed on the side of the first portion 31 away from the substrate 1 , that is, this part of the third portion 41 is not recessed but is disposed flat.

[0040] The substrate 1 may be a hard substrate, such as a glass substrate, or a flexible substrate, and its material may be polyimide, polystyrene, polyethylene terephthalate, polyparaxylene, polyethersulfone or polyethylene naphthalate. The substrate 1 is mainly used to support the device disposed thereon.

[0041] See also Figure 4Optionally, the substrate 1 may include a substrate and an array layer, and the array layer may include a driving circuit. For example, the array layer may include a fourth conductive layer, a third conductive layer, a first conductive layer 2, and a second conductive layer 3, which are arranged on one side of the substrate and stacked. Exemplarily, the pixel driving circuit arranged in the array layer includes a transistor T and a storage capacitor C. The transistor T includes an active layer Z, a gate G, a source S, and a drain D. The storage capacitor R includes a first plate R1 and a second plate R2. As an example, the gate G and the first plate C may be located in the fourth conductive layer, the second plate R2 may be located in the third conductive layer, the source S and the drain D may be located in the first conductive layer 2, and the transition connection portion L for connecting the light-emitting structure 5 and the pixel driving circuit may be located in the second conductive layer 3.

[0042] Optionally, the materials of the first conductive layer 2 and the second conductive layer 3 both include metal, which has good conductivity and is easy to prepare; optionally, the materials of the first conductive layer 2 and the second conductive layer 3 include at least one of titanium, aluminum, and molybdenum.

[0043] See also Figure 3 to Figure 4 In some optional embodiments, the second part 32 includes a first sub-portion 321 and a second sub-portion 322 recessed in the second groove K2, the extension direction of the first sub-portion 321 is parallel to the plane direction of the substrate 1, and the extension direction of the second sub-portion 322 intersects with the extension direction of the first sub-portion 321; the auxiliary connection layer 4 covers the first sub-portion 321 and the second sub-portion 322.

[0044] It can be understood that the extension direction of the first sub-portion 321 is parallel to the plane direction of the substrate 1, that is, the first sub-portion 321 can be set corresponding to the bottom of the second groove K2, and the first sub-portion 321 can contact the substrate 1, and the extension direction of the second sub-portion 322 intersects with the extension direction of the first sub-portion 321, that is, the second sub-portion 322 can cover the side of the part of the first conductive layer 2 forming the second groove K2, and the auxiliary connection layer 4 covers the first sub-portion 321 and the second sub-portion 322 to realize the concave-convex contact connection between the auxiliary connection layer 4 and the second part 32, which effectively improves the stability of the connection between the auxiliary connection layer 4 and the second part 32.

[0045] Optionally, the angle between the extension direction of the second sub-section 322 and the extension direction of the first sub-section 321 should not be too small, otherwise the second portion 32 may be bent too much, resulting in film rupture, and the stability of the auxiliary connection layer 4 on the second sub-section 322 is not utilized. Optionally, the angle between the extension direction of the second sub-section 322 and the extension direction of the first sub-section 321 is greater than or equal to 90° and less than or equal to 135°, so that the first sub-section 321 and the second sub-section 322 have a smooth transition to avoid damage.

[0046] See also Figure 3 to Figure 4In some optional embodiments, the fourth portion 42 includes a third sub-portion 421 and a fourth sub-portion 422 recessed in the first groove K1, the third sub-portion 421 is in contact with the first conductive layer 2, and the fourth sub-portion 422 covers the side of the second conductive layer 3 forming the first groove K1.

[0047] In this embodiment, the third sub-portion 421 and the fourth sub-portion 422 can be connected as a whole, the third sub-portion 421 is in direct contact with the first conductive layer 2, and the second conductive layer 3 is not arranged therebetween, and the fourth sub-portion 422 can also be in contact with the side of the second conductive layer 3 forming the first groove K1, thereby further improving the reliability of the combination of the third sub-portion 421, the fourth sub-portion 422 and other film layers located in the first groove K1, and avoiding the problem of film peeling.

[0048] See also Figure 5 Optionally, in the display area AA, the display panel also includes a light emitting structure 5 arranged on one side of the substrate 1, and along the direction away from the substrate 1, the light emitting structure 5 includes a first electrode layer 51, a light emitting layer 52 and a second electrode layer 53 which are stacked; the auxiliary connection layer 4 is arranged on the same layer as the first electrode layer 51 and is electrically connected to the first electrode layer 51.

[0049] It can be understood that, in this embodiment, the auxiliary connection layer 4 and the first electrode layer 51 are arranged on the same layer and are electrically connected to the first electrode layer 51, so that the auxiliary connection layer 4 provides a driving signal for the first electrode layer 51. The auxiliary connection layer 4 and the first electrode layer 51 can be formed together using the same process to simplify the process flow, that is, the material of the auxiliary connection layer 4 can be the same as that of the first electrode layer 51, thereby reducing production costs.

[0050] Optionally, the light-emitting layer 52 includes one or more of an electron injection layer, an electron transport layer, a light-emitting material layer, a hole blocking layer, an electron blocking layer, a hole transport layer and a hole injection layer. The specific type of the light-emitting layer 52 can be selected without special limitation. The electron injection layer, the electron transport layer and the hole blocking layer can be arranged between the second electrode layer 53 and the light-emitting material layer. The electron blocking layer, the hole transport layer and the hole injection layer can be arranged between the first electrode layer 51 and the light-emitting material layer.

[0051] The material of the first electrode layer 51 is generally a material with a high work function to improve the hole injection efficiency, and may be gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO) or a transparent conductive polymer (such as polyaniline), etc. For example, the first electrode layer 51 may be made of an ITO-Ag-ITO composite material, without special limitation.

[0052] The material of the second electrode layer 53 can be one of the metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca) or indium (In), and can also be an alloy of the aforementioned metal materials, such as magnesium-silver alloy (Mg / Ag) and lithium-aluminum alloy (Li / Al), but this embodiment does not impose any limitation on this.

[0053] See also Figure 6 In some optional embodiments, the second grooves K2 and the first grooves K1 are arranged in a row along the first direction X, and the second grooves K2 and the first grooves K1 are arranged at intervals along the second direction Y. The first direction X and the second direction Y are parallel to the plane where the substrate 1 is located, and the first direction X and the second direction Y intersect.

[0054] It can be understood that in this embodiment, the second slots K2 and the first slots K1 are arranged in an array along the first direction X and the second direction Y, respectively, to improve the regularity of the second slots K2 and the first slots K1, and to facilitate preparation. In addition, along the second direction Y, the second slots K2 and the first slots K1 form different columns, respectively, to avoid mutual influence. Optionally, the second slots K2 and the first slots K1 do not overlap along the second direction Y, that is, the second slots K2 and the first slots K1 are staggered in the second direction Y, which is convenient for separate preparation.

[0055] Of course, according to actual needs, the second slots K2 and the first slots K1 may also be arranged in other forms without special limitation.

[0056] In some optional embodiments, along a direction perpendicular to the direction of the substrate 1 , the cross-sectional shape of the second groove K2 is polygonal or curved; and / or, along a direction perpendicular to the direction of the substrate 1 , the cross-sectional shape of the first groove K1 is polygonal or curved.

[0057] It is understandable that the cross-sectional shape of the second slot K2 in this embodiment can be a polygon such as a rectangle, a trapezoid, or a curved shape such as a curved trapezoid, as long as it can be ensured that the second portion 32 of the second conductive layer 3 and the third portion 41 of the auxiliary connection layer 4 are correspondingly sunken into the second slot K2, and the second conductive layer 3 and the auxiliary connection layer 4 will not be damaged due to the cross-sectional shape of the second slot K2. Similarly, the cross-sectional shape of the first slot K1 can be a polygon such as a rectangle, a trapezoid, or a curved shape such as a curved trapezoid.

[0058] Optionally, in a direction perpendicular to the direction of the substrate 1 , the cross-sectional shape of the second slot K2 is a trapezoid, and the angle between the base and the waist of the trapezoid is greater than 90° and less than or equal to 135°.

[0059] The inventors have found through research that the angle between the bottom and waist of the trapezoid should not be too small, otherwise the second conductive layer 3 in the second slot K2 may be bent to a greater extent and easily damaged, and should not be too large, otherwise the second conductive layer 3 may be too flat, which is not conducive to improving the reliability of the combination with the auxiliary connection layer 4. Optionally, the angle between the bottom and waist of the trapezoid can be equal to any one of 100°, 110°, 120°, 130°, and 135°.

[0060] Optionally, along a direction perpendicular to the direction of the substrate 1 , a cross-sectional shape of the second slot K2 is an isosceles trapezoid.

[0061] And / or, in a direction perpendicular to the direction of the substrate 1, the cross-sectional shape of the first groove K1 is a trapezoid, and the angle between the bottom side and the waist of the trapezoid is greater than 90° and less than or equal to 135°. Similarly, when the cross-sectional shape of the first groove K1 is a trapezoid, the angle between the bottom side and the waist of the trapezoid should not be too small. If it is too small, the auxiliary connection layer 4 located in the first groove K1 may be bent to a large extent and easily damaged. If it is too large, the auxiliary connection layer 4 may be too flat. Optionally, the angle between the bottom side and the waist of the trapezoidal first groove K1 may be equal to any one of 100°, 110°, 120°, 130°, and 135°.

[0062] See also Figure 1 In some optional embodiments, the non-display area NA includes an arc angle area BA and a straight edge area ZA connected to the arc angle area BA; the second groove K2 and the first groove K1 are at least located in the arc angle area BA.

[0063] The inventors have found through research that in the display panel of the prior art, in the arc angle area BA of the non-display area NA, since the conductive layer and the auxiliary connection layer 4 are both arranged flat, the overlapping width of the conductive layer and the auxiliary connection layer 4 is the largest, and the probability of film peeling is correspondingly greater. Therefore, at least in the arc angle area BA, a structure in which the second groove K2 and the first groove K1 are staggered is adopted to improve the reliability of the combination of the second conductive layer 3 and the auxiliary connection layer 4, increase the contact area between the second conductive layer 3 and the auxiliary connection layer 4 at the second groove K2, and increase the contact area between the first conductive layer 2 and the auxiliary connection layer 4 at the first groove K1, thereby improving the stability of the auxiliary connection layer 4 and avoiding the problem of film peeling between the auxiliary connection layer 4 and the film layer located thereunder.

[0064] Optionally, the non-display area NA includes four arc-angle areas BA and four straight-edge areas ZA, and the arc-angle areas BA and the straight-edge areas ZA are alternately arranged along the circumference of the display panel.

[0065] In this embodiment, the display panel may be in a rectangular shape, but its four corners are arc corners.

[0066] An embodiment of the present application further provides a display device, which includes the display panel of any of the above embodiments.

[0067] The display device provided by the embodiment of the present invention has the technical effect of the technical solution of the display panel in any of the above embodiments, and the explanation of the structures and terms that are the same as or corresponding to the above embodiments will not be repeated here.

[0068] The display device provided in the embodiment of the present invention may be an organic light-emitting diode (OLED) display device, a quantum dot light-emitting diode (QLED) or a micro flat panel display device (Micro-OLED or Micro-LED).

[0069] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area adjacent to the display area, and the display panel comprises: substrate; A first conductive layer is disposed on one side of the substrate and is located in the non-display area; A second conductive layer, at least partially disposed on a side of the first conductive layer away from the substrate, the second conductive layer comprising a first groove; The auxiliary connection layer is disposed on the side of the second conductive layer away from the substrate, at least partially located in the first groove, and in contact with the portion of the first conductive layer exposed to the first groove and the side surface of the second conductive layer forming the first groove.

2. The display panel according to claim 1, characterized in that: The first conductive layer includes a second groove; the second conductive layer includes a first portion and a second portion connected to each other, the first portion is arranged on a side of the first conductive layer away from the substrate, the second portion is sunken into the second groove, and the second groove and the first groove do not overlap in a direction perpendicular to the plane where the substrate is located; Preferably, the auxiliary connection layer comprises a third portion and a fourth portion connected to each other, the third portion is arranged on a surface of the second conductive layer facing away from the substrate, a part of the third portion is recessed corresponding to the second portion, and the fourth portion is located in the first groove; Preferably, the fourth portion includes a third sub-portion and a fourth sub-portion sunken into the first groove, the third sub-portion is in contact with the first conductive layer, and the fourth sub-portion covers a side surface of the second conductive layer forming the first groove.

3. The display panel according to claim 2, characterized in that: The second portion includes a first sub-portion and a second sub-portion sunken into the second groove, the extension direction of the first sub-portion is parallel to the plane direction of the substrate, and the extension direction of the second sub-portion intersects with the extension direction of the first sub-portion; The auxiliary connection layer covers the first sub-portion and the second sub-portion.

4. The display panel according to claim 1, characterized in that: In the display area, the display panel further comprises a light emitting structure disposed on one side of the substrate, and in a direction away from the substrate, the light emitting structure comprises a first electrode layer, a light emitting layer and a second electrode layer which are stacked; The auxiliary connection layer is disposed on the same layer as the first electrode layer and is electrically connected to the first electrode layer; Preferably, the material of the auxiliary connection layer is the same as that of the first electrode layer.

5. The display panel according to claim 2, characterized in that: The second grooves and the first grooves are arranged in a row along a first direction, and the second grooves and the first grooves are arranged at intervals along a second direction, the first direction and the second direction are both parallel to the plane where the substrate is located, and the first direction and the second direction intersect; Preferably, the second slot and the first slot do not overlap along the second direction.

6. The display panel according to claim 2, characterized in that: In a direction perpendicular to the direction of the substrate, the cross-sectional shape of the second slot is polygonal or curved; and / or, In a direction perpendicular to the direction of the substrate, the cross-section of the first slot is polygonal or curved.

7. The display panel according to claim 6, characterized in that: In a direction perpendicular to the direction of the substrate, the cross-sectional shape of the second slot is a trapezoid, and the angle between the base and the waist of the trapezoid is greater than 90° and less than or equal to 135°; and / or, In a direction perpendicular to the direction of the substrate, the cross-sectional shape of the first slot is a trapezoid, and an angle between a base and a waist of the trapezoid is greater than 90° and less than or equal to 135°.

8. The display panel according to claim 2, characterized in that: The non-display area includes an arc-corner area and a straight-edge area connected to the arc-corner area; The second slot and the first slot are at least located in the arc angle area; Preferably, the non-display area includes four arc-angle areas and four straight-edge areas, and the arc-angle areas and the straight-edge areas are alternately arranged along the circumference of the display panel.

9. The display panel according to claim 1, characterized in that: The materials of the first conductive layer and the second conductive layer both include metal; Preferably, the material of the first conductive layer and the second conductive layer includes at least one of titanium, aluminum and molybdenum.

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

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