Display panel and display device

Abstract

The present invention discloses a display panel and a display device, wherein the display panel includes a display area and a non-display area surrounding the display area; the display panel includes a substrate, a composite insulating layer, a power line and an auxiliary power line in the non-display area, the composite insulating layer is arranged on one side of the substrate, the power line is arranged on the side of the composite insulating layer away from the substrate, the power line package includes at least a first sub-power line, the auxiliary power line is arranged on the side of the power line away from the substrate, and the power line is electrically connected to the cathode located in the display area through the auxiliary power line; at least one first groove is arranged on the composite insulating layer, and the first sub-power line covers the first groove. Compared with the flat arrangement of the first sub-power line in the prior art, the width of the first sub-power line in the present invention is reduced in a top-down viewing angle, and its width can be compressed without increasing the resistance of the power line and ensuring normal drive display, so as to facilitate the realization of a narrow frame.

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] For the top / left / right frames of the current active-matrix organic light-emitting diode (AMOLED) backplane, the area between the display area and the two tangent lines is generally referred to as the frame. Among them, the width of the VSS (low-level power line) located in the frame area directly restricts the development of narrow frame technology. In order to achieve a narrow frame, the conventional solution currently used includes directly compressing the width of VSS. However, the compression of the VSS width will increase its resistance, thereby increasing the IR drop (voltage drop), and ultimately causing the display uniformity to deteriorate. Summary of the invention

[0003] Embodiments of the present invention provide a display panel and a display device to solve the technical problem that the existing display panel and display device achieve narrow frame by directly compressing the width of VSS, which will increase its resistance, thereby increasing IR drop (voltage drop) and ultimately causing poor display uniformity.

[0004] To solve the above problems, the technical solution provided by the present invention is as follows:

[0005] The present invention provides a display panel, comprising a display area and a non-display area surrounding the display area; the display panel comprises in the non-display area:

[0006] substrate substrate;

[0007] A composite insulating layer is disposed on one side of the substrate base;

[0008] A power line, arranged on a side of the composite insulating layer away from the substrate, the power line package at least comprising a first sub-power line; and

[0009] An auxiliary power line is arranged on a side of the power line away from the base substrate, and the power line is electrically connected to a cathode located in the display area through the auxiliary power line;

[0010] Wherein, at least one first groove is arranged on the composite insulating layer, and the first sub-power line covers the first groove.

[0011] According to the display panel provided by the present invention, the display panel also includes a driving circuit layer in the display area, the driving circuit layer is arranged on one side of the base substrate, and the composite insulating layer is an inorganic stacked structure formed by the inorganic layer in the driving circuit layer extending from the display area to the non-display area.

[0012] According to the display panel provided by the present invention, the power line also includes a second sub-power line, and the display panel also includes a first planarization layer, the first planarization layer covers the first sub-power line, the second sub-power line is located on the side of the first planarization layer away from the base substrate and is electrically connected to the second sub-power line through a first via hole penetrating the first planarization layer, and the second sub-power line is electrically connected to the cathode through the auxiliary power line.

[0013] According to the display panel provided by the present invention, the first sub-power line includes a first bending section and a first flat section, the first bending section covers the first groove, and the first flat section is the portion of the first sub-power line excluding the first bending section; wherein the second sub-power line is electrically connected to the first flat section by passing through the first via hole.

[0014] According to the display panel provided by the present invention, at least one second groove is arranged on the first planarization layer, and the second sub-power line covers the second groove.

[0015] According to the display panel provided by the present invention, in a plane perpendicular to the display panel, the first groove and the second groove are alternately arranged on the display panel, the second groove exposes the first flat section, and the second sub-power line overlaps the first flat section at the second groove.

[0016] According to the display panel provided by the present invention, the second sub-power line includes a second bending section and a second flat section, the second bending section covers the second groove, and the second flat section is the portion of the second power line excluding the second bending section;

[0017] The display panel further includes a second planarization layer, the second sub-power line is arranged on a side of the second planarization layer away from the base substrate, and the auxiliary power line is electrically connected to the second planar segment through a second via hole penetrating the second planarization layer.

[0018] According to the display panel provided by the present invention, the driving circuit layer includes:

[0019] A first active layer is disposed on one side of the substrate;

[0020] a first gate insulating layer, covering the first active layer;

[0021] A first gate layer, disposed on a side of the first gate insulating layer away from the base substrate;

[0022] a second gate insulating layer, covering the first gate layer;

[0023] A second gate layer, disposed on a side of the second gate insulating layer away from the base substrate;

[0024] A first interlayer dielectric layer covering the second gate layer;

[0025] A second active layer is disposed on a side of the first interlayer dielectric layer away from the substrate;

[0026] a third gate insulating layer, covering the second active layer;

[0027] A third gate layer is disposed on a side of the third gate insulating layer away from the substrate;

[0028] A second interlayer dielectric layer covering the third gate layer; and

[0029] A first source-drain metal layer is disposed on a side of the second interlayer dielectric layer away from the substrate;

[0030] The first source-drain metal layer includes a first source, a first drain, a second source and a second drain, the first source and the second drain are electrically connected to the first active layer through a first contact hole penetrating the second interlayer dielectric layer, the third gate insulating layer, the first interlayer dielectric layer, the second gate insulating layer and the first gate insulating layer; the second source and the second drain are electrically connected to the second active layer through a second contact hole penetrating the second interlayer dielectric layer and the third gate insulating layer;

[0031] The first sub-power line is arranged in the same layer as the first source-drain metal layer, and the composite insulating layer includes a first gate insulating layer, a second gate insulating layer, a first interlayer dielectric layer, a third gate insulating layer and the second interlayer dielectric layer.

[0032] According to the display panel provided by the present invention, the first groove and one of the first contact hole or the second contact hole are formed by the same manufacturing process.

[0033] According to the display panel provided by the present invention, the depth of the first groove in the thickness direction of the display panel is between the depth of the first contact hole and the depth of the second contact hole.

[0034] According to the display panel provided by the present invention, the display panel also includes a voltage line in the non-display area, the voltage line is located on the side of the power line close to the display area and is arranged in the same layer as the first sub-power line; the composite insulating layer is also provided with at least one third groove, and the voltage line covers the third groove.

[0035] The present invention provides a display device, comprising the above-mentioned display panel.

[0036] The beneficial effects of the present invention are as follows: in the display panel and display device provided by the present invention, the power line is electrically connected to the cathode located in the display area through the auxiliary power line, and the power line includes at least a first sub-power line. By providing at least one first groove on the composite insulating layer, the first sub-power line covers the first groove. Compared with the first sub-power line in the prior art which is laid flat, since the first sub-power line in the present invention is distributed along the track of the first groove, the actual routing width of the first sub-power line is not compressed, so that the width of the first sub-power line in a top-down perspective can be reduced, thereby enabling the width of the power line as a whole to be reduced in a top-down perspective, and further, the power line width can be compressed without increasing the resistance of the power line and ensuring normal drive display, so that the border of the display panel can be reduced, which is conducive to achieving a narrow border. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention;

[0039] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure of a display panel along AA;

[0040] Figure 3 yes Figure 2 A schematic diagram of a first partial enlarged structure of the display panel at position B;

[0041] Figure 4 yes Figure 3 A schematic diagram comparing the width of the power line in the embodiment with the width of the power line in the prior art;

[0042] Figure 5 yes Figure 2 A second partial enlarged structural diagram of the display panel at position B;

[0043] Figure 6 yes Figure 2 A third partial enlarged structural diagram of the display panel at position B;

[0044] Figure 7 yes Figure 2 A fourth partial enlarged structural diagram of the display panel at position B;

[0045] Figure 8 yes Figure 2Schematic diagram of the local enlarged structure of the display panel at C.

[0046] Description of reference numerals:

[0047] 100, display panel; 100a, display area; 100b, non-display area; 1001b, gate drive circuit area; 1002b, power wiring area; 1003b, binding area; 1004b, package shadow area;

[0048] 101, substrate; 102, composite insulating layer; 103, power line; 1031, first sub-power line; 1031a, first groove; 1031b, third groove; 10311, first bending section; 10312, first flat section; 1032, second sub-power line; 1032a, second groove; 10321, second bending section; 10322, second flat section; 104, driving circuit layer; 105, first planarization layer; 105a, first via hole; 106, second planarization layer; 106a, second via hole;

[0049] 1041, first active layer; 1042, first gate insulating layer; 1043, first gate layer; 1044, second gate insulating layer; 1045, second gate layer; 1046, first interlayer dielectric layer; 1047, second active layer; 1048, third gate insulating layer; 1049, second interlayer dielectric layer; 10410, first source-drain metal layer; 10411, second source-drain metal layer; 10412, third gate layer;

[0050] 107, barrier layer; 108, buffer layer; 1091, auxiliary power line; 1092, anode; 110, light-emitting layer; 111, pixel definition layer; 111a, third via hole; 112, cathode; 113, encapsulation layer; 1131, first inorganic encapsulation layer; 1132, organic encapsulation layer; 1133, second inorganic encapsulation layer; 114, voltage line; 115, driver chip; 116, first contact hole; 117, second contact hole; 118, third contact hole. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings 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 those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0052] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention, Figure 2 yes Figure 1 The embodiment of the present invention provides a display panel 100, wherein the display panel 100 includes a display area 100a and a non-display area 100b surrounding the display area 100a, wherein the display area 100a is used to realize picture display, and the non-display area 100b is a frame area of ​​the display panel 100, and is used to place signal wiring.

[0053] The display panel 100 includes a base substrate 101, a composite insulating layer 102, a power line 103 and an auxiliary power line 1091 in the non-display area 100b. The composite insulating layer 102 is disposed on one side of the base substrate, the power line 103 is disposed on the side of the composite insulating layer 102 away from the base substrate 101, the power line 103 includes at least a first sub-power line 1031, the auxiliary power line 1091 is disposed on the side of the power line 103 away from the base substrate 101, and the power line 103 is electrically connected to the cathode 112 located in the display area 100a through the auxiliary power line 1091. At least one first groove 1031a is disposed on the composite insulating layer 102, and the first sub-power line 1031 covers the first groove 1031a.

[0054] It can be understood that, compared with the flat arrangement of the first sub-power line 1031 in the prior art, the first sub-power line 1031 in the present invention is distributed along the trajectory of the first groove 1031a, and the first sub-power line 1031 is curved. When the actual routing width of the first sub-power line 1031 is not compressed, the width of the first sub-power line 1031 in a top-down perspective can be reduced, thereby achieving a reduction in the width of the power line 103 as a whole in a top-down perspective, and further, the width of the power line 103 can be compressed without increasing the resistance of the power line 103 and ensuring normal display driving, so that the border of the display panel 100 can be reduced, which is conducive to achieving a narrow border.

[0055] Optionally, the display panel 100 may be a flexible display panel 100, the substrate 101 may be a flexible substrate 101, the substrate 101 may include a single-layer flexible substrate, or may include a double-layer or multi-layer flexible substrate, and exemplarily, the substrate 101 may include two flexible substrates and a barrier layer 107 disposed between the two flexible substrates. Specifically, the materials of the two flexible substrates are independently selected from one of polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyarylate (PAR), polycarbonate (PC), polyetherimide (PEI) and polyethersulfone (PES).

[0056] Specifically, the display panel 100 is provided with a plurality of sub-pixels in the display area 100a, and the plurality of sub-pixels are distributed in an array. The display panel 100 also includes a driving circuit layer 104 in the display area 100a, and the driving circuit layer 104 is provided on one side of the base substrate 101. The driving circuit layer 104 includes a plurality of pixel driving circuits, and the pixel driving circuits are used to drive the sub-pixels to emit light. The pixel driving circuit includes a plurality of thin film transistors, and the plurality of thin film transistors include a driving transistor.

[0057] In an embodiment of the present invention, the composite insulating layer 102 is an inorganic stacked structure formed by extending the inorganic layer in the driving circuit layer 104 from the display area 100a to the non-display area 100b, and the first groove 1031a can penetrate a single layer or multiple layers in the composite insulating layer 102.

[0058] The non-display area 100b includes a gate drive circuit area 1001b, a power wiring area 1002b and a package shadow area 1004b located at the left and right frames of the display panel 100, the gate drive circuit area 1001b surrounds the display area 100a, the power wiring area 1002b surrounds the gate drive circuit area 1001b, and the package shadow area 1004b surrounds the power wiring area 1002b. The gate drive circuit area 1001b includes a gate drive circuit. The gate drive circuit includes a plurality of cascaded gate drive circuit units, and the gate drive circuit unit is used to provide a scanning signal for the sub-pixels located in the same row. A cutting path is provided on the side of the package shadow area 1004b away from the display area 100a.

[0059] Furthermore, the non-display area 100b further includes a binding area 1003b located at the lower frame of the display panel 100, and the binding area 1003b is provided with a driver chip 115 for transmitting an external driving signal. In an embodiment of the present invention, the power line 103 is located in the power wiring area 1002b, and the power line 103 can be a low-level voltage signal line (VSS), and the low-level voltage signal line is connected to the driver chip 115 to transmit the low-level voltage signal provided by the driver chip 115 to the sub-pixel.

[0060] It can be understood that in order to reduce the overall resistance of the power line 103 and reduce the voltage drop of the voltage signal, the power line 103 can adopt a double-layer or multi-layer wiring parallel structure. Exemplarily, in an embodiment of the present invention, the power line 103 adopts a double-layer wiring parallel structure, specifically, the power line 103 also includes a second sub-power line 1032, the display panel 100 also includes a first planarization layer 105, the first planarization layer 105 covers the first sub-power line 1031, the second sub-power line 1032 is located on the side of the first planarization layer 105 away from the base substrate 101 and is electrically connected to the second sub-power line 1032 through a first via 105a penetrating the first planarization layer 105, and the second sub-power line 1032 is electrically connected to the cathode 112 through the auxiliary power line 1091.

[0061] Specifically, see Figure 3 , Figure 3 yes Figure 2The first partial enlarged structural diagram of the display panel at B in FIG. The first sub-power line 1031 includes a first bending section 10311 and a first flat section 10312, wherein the first bending section 10311 covers the first groove 1031a, and the first flat section 10312 is the portion of the first sub-power line 1031 excluding the first bending section 10311; wherein the second sub-power line 1032 is electrically connected to the first flat section 10312 by penetrating the first via 105a. It should be noted that the first bending section 10311 refers to the bending portion of the first sub-power line 1031, and the first flat section 10312 refers to the portion of the first sub-power line 1031 flattened onto the composite insulating layer 102.

[0062] See also Figure 4 , Figure 4 yes Figure 3 A schematic diagram comparing the width of the power line in the embodiment of the present invention with the width of the power line in the prior art. Figure 4 For example, the left picture in Figure 4 is the power line in the prior art, and the right picture is the power line 103 in the present invention. The actual routing width of the first sub-power line 1031 in the left picture is the same as the actual routing width of the first sub-power line 1031 in the right picture, both of which are L. The width of the first sub-power line 1031 in the left picture when viewed from above is L1, and the width of the first sub-power line 1031 in the right picture when viewed from above is L2. In the right picture, due to the existence of the first groove 1031a, L2 is smaller than L2, thereby reducing the overall width of the power line 103, which is beneficial to reducing the frame.

[0063] In the embodiment of the present invention, the number of the first groove 1031a can be single or multiple. Compared with setting one first groove 1031a, setting multiple first grooves 1031a can further reduce the width of the first sub-power line 1031 in a top view, thereby further achieving a narrow frame. Figure 3 As shown, the first sub-power line 1031 is provided with a first groove 1031a. Figure 5 As shown, Figure 5 yes Figure 2 The second partial enlarged structural diagram of the display panel in FIG. Two first grooves 1031 a are disposed on the first sub-power line 1031 , and one first flat section 10312 is disposed between two adjacent first bending sections 10311 .

[0064] See also Figure 6 , Figure 6 yes Figure 2Schematic diagram of the third partial enlarged structure of the display panel at B in FIG. In order to further reduce the overall resistance of the power line 103 and further reduce the width of the power line in a top-down perspective, similar to the first sub-power line 1031, the second sub-power line 1032 can also adopt a curved routing design. Specifically, at least one second groove 1032a is provided on the first planarization layer 105, and the second sub-power line 1032 covers the second groove 1032a. When the actual routing width of the second sub-power line 1032 is not compressed, the width of the second sub-power line 1032 in a top-down perspective can be reduced, thereby further reducing the width of the power line 103 as a whole in a top-down perspective, and then compressing its width without increasing the resistance of the power line 103 and ensuring normal drive display, so that the border of the display panel 100 can be reduced, which is conducive to achieving a narrow border.

[0065] In the embodiment of the present invention, the first groove 1031a and the second groove 1032a are alternately arranged in the thickness direction of the display panel 100, the second groove 1032a exposes the first flat section 10312, and the second sub-power line 1032 overlaps the first flat section 10312 at the second groove 1032a. At this time, the second groove 1032a also serves as the first via 105a.

[0066] Specifically, the second sub-power line 1032 includes a second bending section 10321 and a second flat section 10322, the second bending section 10321 covers the second groove 1032a, and the second flat section 10322 is the portion of the second sub-power line 1032 excluding the second bending section 10321; the display panel 100 also includes a second planarization layer 106, and the second sub-power line 1032 is arranged on a side of the second planarization layer 106 away from the base substrate 101; wherein the auxiliary power line 1091 is electrically connected to the second flat section 10322 through a second via 106a penetrating the second planarization layer 106.

[0067] In the embodiment of the present invention, the number of the second groove 1032a can be single or multiple. Figure 6 As shown, the second sub-power line 1032 is provided with a second groove 1032a. Figure 7 As shown, Figure 7 yes Figure 2 A fourth partial enlarged structural diagram of the display panel at B in FIG. A plurality of second grooves 1032 a are disposed on the first sub-power line 1031 , and a first flat section 10312 is disposed between two adjacent first bending sections 10311 .

[0068] Please refer again Figure 2 In an embodiment of the present invention, the display panel 100 may be a low temperature polycrystalline oxide (LTPO) display panel 100, and the display panel 100 includes both oxide thin film transistors and low temperature polycrystalline silicon thin film transistors.

[0069] Specifically, the driving circuit layer 104 includes a first active layer 1041, a first gate insulating layer 1042, a first gate layer 1043, a second gate insulating layer 1044, a second gate layer 1045, a first interlayer dielectric layer 1046, a second active layer 1047, a third gate insulating layer 1048, a third gate layer 10412, a second interlayer dielectric layer 1049 and a first source and drain metal layer 10410.

[0070] The first active layer 1041 is arranged on one side of the base substrate 101; the first gate layer 1043 is arranged on the side of the first gate insulating layer 1042 away from the base substrate 101; the second gate insulating layer 1044 covers the first gate layer 1043; the second gate layer 1045 is arranged on the side of the second gate insulating layer 1044 away from the base substrate 101; the first interlayer dielectric layer 1046 covers the second gate layer 1045; the second active layer 1047 is arranged on the side of the first interlayer dielectric layer 1046 away from the base substrate 101; the third gate insulating layer 1048 covers the second active layer 1047; the third gate layer 10412 is arranged on the side of the third gate insulating layer 1048 away from the base substrate 101; the second interlayer dielectric layer 1049 covers the third gate layer 10412; the first source and drain metal layer 10410 is arranged on the side of the second interlayer dielectric layer 1049 away from the base substrate 101.

[0071] Among them, the first source and drain metal layer 10410 includes a first source, a first drain, a second source and a second drain, the first source and the second drain are electrically connected to the first active layer 1041 through a first contact hole 116 penetrating the second interlayer dielectric layer 1049, the third gate insulating layer 1048, the first interlayer dielectric layer 1046, the second gate insulating layer 1044 and the first gate insulating layer 1042; the second source and the second drain are electrically connected to the second active layer 1047 through a second contact hole 117 penetrating the second interlayer dielectric layer 1049 and the third gate insulating layer 1048.

[0072] In the embodiment of the present invention, the composite insulating layer 102 includes a first gate insulating layer 1042 , a second gate insulating layer 1044 , a first interlayer dielectric layer 1046 , a third gate insulating layer 1048 and the second interlayer dielectric layer 1049 .

[0073] In an embodiment of the present invention, the first sub-power line 1031 is arranged in the same layer as the first source-drain metal layer 10410, and the first groove 1031a and one of the first contact hole 116 or the second contact hole 117 are formed by the same process, which can save one process.

[0074] Optionally, the depths of the plurality of first grooves 1031a may be the same or different; the widths of the plurality of first grooves 1031a may be the same or different. Similarly, the depths of the plurality of second grooves 1032a may be the same or different; the widths of the plurality of second grooves 1032a may be the same or different. This is not limited in the embodiment of the present invention.

[0075] In an embodiment of the present invention, in order to improve the brightness uniformity of the display area 100a, the driving circuit layer 104 also includes a second source and drain metal layer 10411, and the second source and drain metal layer 10411 is arranged on the side of the first planarization layer 105 away from the base substrate 101, and the second source and drain metal layer 10411 is electrically connected to one of the second source and the second drain through a third contact hole 118 penetrating the second planarization layer 106.

[0076] Similarly, the second sub-power line 1032 and the second source-drain metal layer 10411 are arranged in the same layer, and the second groove 1032a and the third contact hole 118 are formed by the same process, which can further save one process.

[0077] In the embodiment of the present invention, the depth of the first groove 1031a in the thickness direction of the display panel 100 is between the depth of the first contact hole 116 and the depth of the second contact hole 117, so as to avoid the depth of the first groove 1031a being too small or too large. It can be understood that if the depth of the first groove 1031a is too small, the compression degree of the actual routing width of the first sub-power line 1031 will be too small, resulting in failure to achieve a narrow frame. If the depth of the second groove 1032a is too large, the first sub-power line 1031 will be easily disconnected at the second groove 1032a, thereby affecting the display effect.

[0078] Furthermore, in the embodiment of the present invention, a barrier layer 107 and a buffer layer 108 are further provided between the base substrate 101 and the driving circuit layer 104. The barrier layer 107 is provided on one side of the base substrate 101 to prevent water vapor from diffusing from the base substrate 101 to the driving circuit layer 104 above. The buffer layer 108 is provided on the side of the second barrier layer 107 away from the base substrate 101 to play a buffering role.

[0079] Optionally, the material of the barrier layer 107 can be selected from inorganic materials such as silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiON) and their stacks, to prevent water vapor from diffusing from the flexible substrate to the upper driving circuit layer 104. The material of the buffer layer 108 can be inorganic materials such as silicon nitride or silicon oxide and their stacks.

[0080] In the embodiment of the present invention, the composite insulating layer 102 further includes the barrier layer 107 and the buffer layer 108 .

[0081] In the embodiment of the present invention, the orthographic projection of the second sub power line 1032 on the base substrate 101 is located within the orthographic projection of the first sub power line 1031 on the base substrate 101 , so that the overall width of the power line 103 depends on the width of the first sub power line 1031 .

[0082] Furthermore, please combine Figure 2 and Figure 8 , Figure 8 yes Figure 2 Schematic diagram of the partial enlarged structure of the display panel at C in the figure. In the embodiment of the present invention, the display panel 100 further includes a voltage line 114 in the non-display area 100b, the voltage line 114 is located in the gate drive circuit area 1001b, the voltage line 114 is located on the side of the power line 103 close to the display area 100a and is arranged in the same layer as the first sub-power line 1031; the composite insulating layer 102 is also provided with at least one third groove 1031b, and the voltage line 114 covers the third groove 1031b. It can be understood that the voltage line 114 in the present invention is distributed along the track of the third groove 1031b, and the voltage line 114 is curved. When the actual routing width of the voltage line 114 is not compressed, the width of the voltage line 114 can be reduced in a top-down viewing angle, so that the width of the voltage line 114 can be compressed without increasing the resistance of the voltage line 114 and ensuring normal drive display, so that the frame of the display panel 100 can be further reduced, which is conducive to achieving a narrow frame.

[0083] Further, please refer again to Figure 2The display panel 100 further includes an anode 1092 in the display area 100a. The anode 1092 is disposed in the same layer as the auxiliary power line 1091. The anode 1092 is electrically connected to the second source-drain metal layer 10411 through a fourth contact hole penetrating the second planarization layer 106.

[0084] The display panel 100 further includes a pixel definition layer 111, the pixel definition layer 111 covers the second planarization layer 106 and the anode 1092, the pixel definition layer 111 defines a plurality of pixel openings, the sub-pixels include a light emitting layer 110, and the light emitting layer 110 is disposed in the pixel openings. The cathode 112 is disposed on a side of the pixel definition layer 111 and the light emitting layer 110 away from the base substrate 101, and the auxiliary power line 1091 is electrically connected to the cathode 112 through a third via hole 111a penetrating the pixel definition layer 111.

[0085] The display panel 100 further includes an encapsulation layer 113, which covers the sub-pixels and is used to prevent external water and oxygen from invading the light-emitting layer 110 and causing failure of the organic material. The encapsulation layer 113 may be a thin film encapsulation, and the encapsulation layer 113 includes a first inorganic encapsulation layer 1131, an organic encapsulation layer 1132, and a second inorganic encapsulation layer 1133, which are stacked. The first inorganic encapsulation layer 1131 and the second inorganic encapsulation layer 1133 extend from the display area 100a to the non-display area 100b, and the organic encapsulation layer 1132 covers the display area 100a.

[0086] An embodiment of the present invention further provides a display device, which includes the display panel 100 in the above embodiment. The display device may include any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame or a navigator.

[0087] The beneficial effect is as follows: in the display panel and the display device provided by the embodiments of the present invention, the power line is electrically connected to the cathode located in the display area through the auxiliary power line, the power line includes at least a first sub-power line, and at least one first groove is provided on the composite insulating layer, the first sub-power line covers the first groove, and since the first sub-power line is distributed along the track of the first groove, when the actual routing width of the first sub-power line is not compressed, the width of the first sub-power line can be reduced when viewed from a top-down perspective, thereby reducing the width of the power line as a whole when viewed from a top-down perspective, and further compressing its width without increasing the resistance of the power line and ensuring normal drive display, so that the border of the display panel can be reduced, which is conducive to achieving a narrow border.

[0088] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A display panel, characterized in that: comprising a display area and a non-display area surrounding the display area; The display panel comprises in the non-display area: substrate substrate; A composite insulating layer is disposed on one side of the substrate base; A power line, arranged on a side of the composite insulating layer away from the substrate, the power line package at least comprising a first sub-power line; and An auxiliary power line is arranged on a side of the power line away from the base substrate, and the power line is electrically connected to a cathode located in the display area through the auxiliary power line; Wherein, at least one first groove is provided on the composite insulating layer, and the first sub-power line covers the first groove; The power line also includes a second sub-power line, and the display panel also includes a first planarization layer, the first planarization layer covers the first sub-power line, the second sub-power line is located on a side of the first planarization layer away from the base substrate and is electrically connected to the second sub-power line through a first via hole penetrating the first planarization layer, and the second sub-power line is electrically connected to the cathode through the auxiliary power line; at least one second groove is provided on the first planarization layer, and the second sub-power line covers the second groove.

2. The display panel according to claim 1, characterized in that: The display panel further includes a driving circuit layer in the display area, the driving circuit layer is arranged on one side of the base substrate, and the composite insulating layer is an inorganic stacked structure formed by the inorganic layer in the driving circuit layer extending from the display area to the non-display area.

3. The display panel according to claim 1, characterized in that: The first sub-power line includes a first bending section and a first flat section, the first bending section covers the first groove, and the first flat section is the portion of the first sub-power line excluding the first bending section; wherein the second sub-power line is electrically connected to the first flat section by passing through the first via hole.

4. The display panel according to claim 1, characterized in that: In a plane perpendicular to the display panel, the first groove and the second groove are alternately arranged, the second groove exposes the first flat section, and the second sub-power line overlaps the first flat section at the second groove.

5. The display panel according to claim 4, characterized in that: The second sub-power line includes a second bending section and a second flat section, the second bending section covers the second groove, and the second flat section is the portion of the second sub-power line excluding the second bending section; The display panel further includes a second planarization layer, the second sub-power line is arranged on a side of the second planarization layer away from the base substrate, and the auxiliary power line is electrically connected to the second planar segment through a second via hole penetrating the second planarization layer.

6. The display panel according to claim 2, characterized in that: The driving circuit layer comprises: A first active layer is disposed on one side of the substrate; a first gate insulating layer, covering the first active layer; A first gate layer, disposed on a side of the first gate insulating layer away from the base substrate; a second gate insulating layer, covering the first gate layer; A second gate layer, disposed on a side of the second gate insulating layer away from the base substrate; A first interlayer dielectric layer covering the second gate layer; A second active layer is disposed on a side of the first interlayer dielectric layer away from the substrate; a third gate insulating layer, covering the second active layer; A third gate layer is disposed on a side of the third gate insulating layer away from the substrate; A second interlayer dielectric layer covering the third gate layer; and A first source-drain metal layer is disposed on a side of the second interlayer dielectric layer away from the substrate; The first source-drain metal layer includes a first source, a first drain, a second source and a second drain, the first source and the second drain are electrically connected to the first active layer through a first contact hole penetrating the second interlayer dielectric layer, the third gate insulating layer, the first interlayer dielectric layer, the second gate insulating layer and the first gate insulating layer; the second source and the second drain are electrically connected to the second active layer through a second contact hole penetrating the second interlayer dielectric layer and the third gate insulating layer; The first sub-power line is arranged in the same layer as the first source-drain metal layer, and the composite insulating layer includes a first gate insulating layer, a second gate insulating layer, a first interlayer dielectric layer, a third gate insulating layer and the second interlayer dielectric layer.

7. The display panel according to claim 6, characterized in that: The first groove and one of the first contact hole or the second contact hole are formed by a same manufacturing process.

8. The display panel according to claim 7, characterized in that: The depth of the first groove in the thickness direction of the display panel is between the depth of the first contact hole and the depth of the second contact hole.

9. The display panel according to claim 1, characterized in that: The display panel further includes a voltage line in the non-display area, the voltage line is located on a side of the power line close to the display area and is arranged in the same layer as the first sub-power line; the composite insulating layer is also provided with at least one third groove, and the voltage line covers the third groove.

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

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