Display panel, manufacturing method thereof, and display device

Abstract

The present invention discloses a display panel, a method for manufacturing the same, and a display device. The display panel includes a base substrate, a pixel driving circuit, a first organic layer, a first metal trace, a second organic layer, and an anode. The anode and the first metal trace at least partially overlap. Within the region where the anode is located, the distance between the first surface of the second organic layer located in the region where the first metal trace is located, which is away from the base substrate, and the second surface of the second organic layer located outside the region where the first metal trace is located, which is away from the base substrate, is less than the thickness of the first metal trace. The display panel, a method for manufacturing the same, and a display device provided by an embodiment of the present invention improve the flatness of the anode, improve the four-way color deviation problem, and enhance the display effect of the display panel by setting the distance between the upper surface of the second organic layer in the region where the first metal trace is located and the upper surface of the second organic layer outside the region where the first metal trace is located to be less than the thickness of the first metal trace.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) display panels are widely used in the field of display technology due to their many advantages such as active luminescence, high contrast, and no viewing angle limitation.

[0003] OLED display panels generally include sub-pixels of different colors, such as red sub-pixels, blue sub-pixels, and green sub-pixels, which are used to display color patterns in combination. Due to the inconsistent brightness attenuation of the sub-pixels of each color at different viewing angles, the OLED display panel will have visual color deviation. In addition, the color deviation at the same tilt angle in different directions is inconsistent, that is, there will be a problem of inconsistent color deviation in all four directions, which will affect the display effect of the display panel. Summary of the Invention

[0004] The present invention provides a display panel and a manufacturing method thereof, and a display device to solve the problem of inconsistent color shift in four directions.

[0005] According to one aspect of the present invention, there is provided a display panel, comprising:

[0006] substrate;

[0007] A pixel driving circuit is located on one side of the substrate;

[0008] A first organic layer is located on a side of the pixel driving circuit away from the base substrate;

[0009] a first metal wiring, located on a side of the first organic layer away from the pixel driving circuit;

[0010] a second organic layer, located on a side of the first metal wiring away from the pixel driving circuit;

[0011] an anode, located on a side of the second organic layer away from the pixel driving circuit, and at least partially overlapping the first metal trace along the thickness direction of the base substrate;

[0012] The area where the first metal wiring is located is the first wiring area;

[0013] In the area where the anode is located, the surface of the second organic layer located in the first wiring area on the side away from the base substrate is the first surface, and the surface of the second organic layer located outside the first wiring area on the side away from the base substrate is the second surface. Along the thickness direction of the base substrate, the distance between the first surface and the second surface is less than the thickness of the first metal wiring.

[0014] According to another aspect of the present invention, a display device is provided, comprising the display panel according to the first aspect.

[0015] According to another aspect of the present invention, there is provided a method for preparing a display panel, comprising:

[0016] Prepare a pixel driving circuit on one side of the base substrate;

[0017] Prepare a first organic layer on a side of the pixel driving circuit away from the base substrate;

[0018] preparing a first metal trace on a side of the first organic layer away from the pixel driving circuit;

[0019] A second organic layer is formed on a side of the first metal trace away from the pixel driving circuit, wherein the area where the first metal trace is located is a first trace area; within the area where the anode is located, a surface of the second organic layer located in the first trace area on a side away from the base substrate is a first surface, and a surface of the second organic layer located outside the first trace area on a side away from the base substrate is a second surface, and along the thickness direction of the base substrate, a distance between the first surface and the second surface is less than the thickness of the first metal trace;

[0020] The anode is prepared on a side of the second organic layer away from the pixel driving circuit, and along the thickness direction of the base substrate, the anode at least partially overlaps with the first metal wiring.

[0021] The technical solution of the embodiment of the present invention is to set, in the area covered by the anode, the maximum distance between the first surface of the second organic layer in the first routing area where the first metal routing is located, which is away from the substrate substrate, and the second surface of the second organic layer outside the first routing area, which is away from the substrate substrate, is less than the thickness of the first metal routing in the thickness direction of the substrate substrate, so as to reduce the vertical height difference between the first surface of the second organic layer above the first metal routing and the second surface of the second organic layer above the non-first metal routing in the area covered by the anode, thereby improving the flatness of the anode, and further reducing the brightness difference of the organic light-emitting layer when the display panel is viewed at the same tilt angle in different directions, reducing the color deviation difference under the same tilt angle viewing angle in different directions, improving the problem of inconsistent color deviation in four directions, and improving the display effect of the display panel.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 Schematic diagram of the structure of a display panel in related art;

[0025] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the A-A' direction;

[0026] Figure 3 A schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B;

[0028] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the C-C' direction;

[0029] Figure 6 A partial cross-sectional schematic diagram of a display panel provided by an embodiment of the present invention;

[0030] Figure 7 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of a partial structure of a display panel provided by an embodiment of the present invention;

[0032] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure along the D-D' direction;

[0033] Figure 10 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention;

[0034] Figure 11 for Figure 4 Schematic diagram of the cross-sectional structure along the E-E' direction;

[0035] Figure 12 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention;

[0036] Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along the F-F' direction;

[0037] Figure 14 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention;

[0038] Figure 15 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention;

[0039] Figure 16 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention;

[0040] Figure 17 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention;

[0041] Figure 18 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0042] Figure 19 A schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0043] Figure 20 for Figure 19 Schematic diagram of the enlarged structure at G;

[0044] Figure 21 for Figure 20 Schematic diagram of the cross-sectional structure along the II' direction;

[0045] Figure 22 A schematic structural diagram of a display device provided by an embodiment of the present invention;

[0046] Figure 23 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present invention;

[0047] Figure 24 A schematic diagram of the structure of a process of a method for manufacturing a display panel provided by an embodiment of the present invention;

[0048] Figure 25 A schematic diagram of the structure of a process of another method for manufacturing a display panel provided by an embodiment of the present invention;

[0049] Figure 26 A schematic structural diagram of a process of another method for manufacturing a display panel provided by an embodiment of the present invention;

[0050] Figure 27 A schematic structural diagram of a process of another method for manufacturing a display panel provided by an embodiment of the present invention;

[0051] Figure 28 A schematic structural diagram of a process of another method for manufacturing a display panel provided by an embodiment of the present invention;

[0052] Figure 29 A schematic structural diagram of a process of another method for manufacturing a display panel provided by an embodiment of the present invention;

[0053] Figure 30 A schematic structural diagram of a process of another method for manufacturing a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] Organic Light-Emitting Diode (OLED) display panels generally include sub-pixels of different colors, such as red sub-pixels, blue sub-pixels, and green sub-pixels, which are used to display color patterns in combination. Due to the inconsistent brightness attenuation of the sub-pixels of each color at different viewing angles, the OLED display panel will have visual color deviation. In addition, the color deviation at the same tilt angle in different directions is inconsistent, that is, there will be a problem of inconsistent color deviation in all four directions, which will affect the display effect of the display panel.

[0057] Figure 1is a structural diagram of a display panel in related technology. Figure 2 for Figure 1 Schematic diagram of the cross-section structure along the A-A' direction, see Figure 1 and Figure 2 The display panel includes a base substrate 10' and a pixel driving circuit 11' disposed on one side of the base substrate 10', a first organic layer 12', a first metal trace 13', a second organic layer 14', an anode 15', an organic light-emitting layer 16', and a cathode 17'. The anode 15', the organic light-emitting layer 16', and the cathode 17' constitute a light-emitting device. The pixel driving circuit 11' is electrically connected to the light-emitting device to provide a driving current for the light-emitting device. Electrons and holes are injected from the cathode 17' and the anode 15' into the organic light-emitting layer 16', respectively, forming excitons within the organic light-emitting layer 16' and exciting the light-emitting molecules, thereby causing the organic light-emitting layer 16' to emit visible light. The first metal trace 13' is used to transmit the signals required for display.

[0058] The inventors have found through research that Figure 2 As shown, along the thickness direction of the base substrate 10', since the vertical distance between the first metal trace 13' and the anode 15' is relatively close, and there is an overlap between the first metal trace 13' and the anode 15', the anode 15' above the first metal trace 13' bulges upward, and the height of the bulge is consistent with the thickness of the first metal trace 13', affecting the flatness of the anode 15', and further causing the organic light-emitting layer 16' above the anode 15 to be uneven. As a result, when the display panel is viewed at the same tilt angle in different directions, there is a difference in the brightness of the organic light-emitting layer 16', resulting in inconsistent color deviation at the same tilt angle in different directions, that is, there is a problem of inconsistent color deviation in four directions, which affects the display effect of the display panel.

[0059] If the anode 15' and the first metal trace 13' are not overlapped along the thickness direction of the substrate 10', the position of the light emitting device needs to be moved. The first metal trace 13' limits the relative position setting of the light emitting devices of different colors, which is not conducive to the combination of light emitting devices of different colors to display color patterns.

[0060] Based on the above technical problems, an embodiment of the present invention provides a display panel comprising a base substrate, a pixel driving circuit, a first organic layer, a first metal trace, a second organic layer, and an anode, wherein the anode and the first metal trace at least partially overlap along the thickness direction of the base substrate. The region where the first metal trace is located is a first trace region. Within the region where the anode is located, the surface of the second organic layer located in the first trace region on the side away from the base substrate is a first surface, and the surface of the second organic layer located outside the first trace region on the side away from the base substrate is a second surface. Along the thickness direction of the base substrate, the distance between the first surface and the second surface is less than the thickness of the first metal trace.

[0061] By adopting the above technical solution, a maximum distance along the thickness direction of the substrate between the first surface of the second organic layer in the first routing area where the first metal routing is located, which is away from the substrate substrate, and the second surface of the second organic layer outside the first routing area, which is away from the substrate substrate, is set to be less than the thickness of the first metal routing in the area covered by the anode, so as to reduce the vertical height difference between the first surface of the second organic layer above the first metal routing and the second surface of the second organic layer above the non-first metal routing in the area covered by the anode, thereby improving the flatness of the anode, and further reducing the brightness difference of the organic light-emitting layer when the display panel is viewed at the same tilt angle in different directions, reducing the color deviation difference under the same tilt angle viewing angle in different directions, improving the problem of inconsistent color deviation in four directions, and improving the display effect of the display panel.

[0062] The above is the core concept of the present invention. The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0063] Figure 3 A schematic structural diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B, Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the C-C' direction, as shown in Figure 3-Figure 5 As shown, the display panel provided by the embodiment of the present invention includes:

[0064] Base substrate 10 .

[0065] The pixel driving circuit 11 is located on one side of the base substrate 10 .

[0066] The first organic layer 12 is located on a side of the pixel driving circuit 11 away from the base substrate 10 .

[0067] The first metal wiring 13 is located on a side of the first organic layer 12 away from the pixel driving circuit 11 .

[0068] The second organic layer 14 is located on a side of the first metal wiring 13 away from the pixel driving circuit 11 .

[0069] The anode 15 is located on a side of the second organic layer 14 away from the pixel driving circuit 11 .

[0070] Along the thickness direction of the base substrate 10, the anode 15 at least partially overlaps with the first metal trace 13, wherein the area where the first metal trace 13 is located is the first trace area 131. Within the area where the anode 15 is located, the surface of the second organic layer 14 located in the first trace area 131 on the side away from the base substrate 10 is the first surface 21, and the surface of the second organic layer 14 located outside the first trace area 131 on the side away from the base substrate 10 is the second surface 22. Along the thickness direction of the base substrate 10, the distance d1 between the first surface 21 and the second surface 22 is less than the thickness d2 of the first metal trace 13.

[0071] Specifically, such as Figure 3-Figure 5 As shown, the base substrate 10 can be a rigid base substrate or a flexible base substrate, wherein the rigid base substrate can be a glass base substrate or a silicon base substrate, and the flexible base substrate can be a stainless steel base substrate or a polyimide base substrate, but is not limited thereto. The base substrate 10 can also adopt other types of base substrates known to those skilled in the art, and the embodiments of the present invention are not limited thereto.

[0072] A pixel driving circuit 11 is provided on the substrate 10. The pixel driving circuit 11 may include a thin film transistor T and a storage capacitor (not shown in the figure). The thin film transistor T may include multiple film layers for forming the pixel driving circuit 11, for example, Figure 5 As shown, the thin film transistor T includes an active layer 31 , a gate layer 32 , a source / drain electrode layer 33 , and a plurality of insulating layers for insulating the electrodes from each other.

[0073] Among them, the thin film transistor T can adopt a bottom gate structure or a top gate structure; the pixel driving circuit 11 can be a 1T1C circuit, a 2T1C circuit, a 7T1C circuit or other types of pixel driving circuits known to those skilled in the art. On this basis, the vertical film layer structure of the thin film transistor layer can be set according to the actual requirements of the display panel, and the embodiment of the present invention is not limited to this.

[0074] Continue to refer Figure 5 A first organic layer 12 is provided on the pixel driving circuit 11. The first organic layer 12 may be made of an organic insulating material known to those skilled in the art to play the role of insulation and planarization.

[0075] A first metal wiring 13 is provided above the first organic layer 12. The first metal wiring 13 can be various wirings in the display panel, such as power voltage lines, scan signal lines, data signal lines, light-emitting control signal lines, etc., and can be provided according to the actual display panel structure during specific implementation.

[0076] A second organic layer 14 is disposed on the first metal trace 13 . The second organic layer 14 may include organic materials such as acrylic, polyimide (PI) or benzocyclobutene (BCB) to perform insulation and planarization functions, but is not limited thereto.

[0077] Anodes 15 are provided on the second organic layer 14 . Each anode 15 corresponds to a sub-pixel. The anodes 15 are electrically connected to the source-drain electrode layer 33 of the thin film transistor T through via holes on the second organic layer 14 .

[0078] The anode 15 can be formed of various conductive materials. For example, the anode 15 can be formed as a transparent electrode or a reflective electrode according to its purpose. When the anode 15 is formed as a transparent electrode, it can include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) or indium oxide (In2O3), etc. When the anode 15 is formed as a reflective electrode, the reflective layer can be formed of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr) or a mixture thereof, and ITO, IZO, ZnO or In2O3 can be formed on the reflective layer, but is not limited to this. The embodiment of the present invention does not limit this.

[0079] Continue to refer Figure 4 and Figure 5 Along the thickness direction of the base substrate 10, there is an overlap between the anode 15 and the first metal trace 13. Such a setting helps to increase the setting density of the anode 15, thereby increasing the pixel density of the display panel and achieving a better display effect.

[0080] Continue to refer Figure 5Along the thickness direction of the base substrate 10, within the area covered by the anode 15, the maximum distance d1 along the thickness direction of the base substrate 10 between the first surface 21 of the second organic layer 14 in the first routing area 131 where the first metal routing 13 is located, which is away from the base substrate 10, and the second surface 22 of the second organic layer 14 outside the first routing area 131, which is away from the base substrate 10, is less than the thickness d2 of the first metal routing 13. That is, within the area covered by the anode 15, the vertical height difference between the upper surface of the second organic layer 14 above the first metal routing 13 and the upper surface of the second organic layer 14 not above the first metal routing 13 is less than the thickness d2 of the first metal routing 13. Compared with the prior art, the height of the first surface 21 of the second organic layer 14 on the side away from the base substrate 10 in the first wiring area 131 where the first metal wiring 13 is located is reduced relative to the second surface 22 in the area covered by the anode 15. That is, in the area covered by the anode 15, the vertical height difference between the upper surface of the second organic layer 14 above the first metal wiring 13 and the upper surface of the second organic layer 14 above the non-first metal wiring 13 is reduced, thereby improving the flatness of the anode 15. Further, when the display panel is viewed at the same tilt angle in different directions, the brightness difference of the organic light-emitting layer 16 is reduced, the color deviation difference at the same tilt angle viewing angle in different directions is reduced, the problem of inconsistent color deviation in four directions is improved, and the display effect of the display panel is improved.

[0081] It should be noted that, in order to clearly illustrate the film layer structure involved in the present invention, only part of the structure of the display panel is shown in the drawings. It can be understood that in actual applications, the display panel also includes other functional film layer structures.

[0082] For example, Figure 6 A partial cross-sectional diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, a pixel definition layer 18 is further provided on the second organic layer 14. The pixel definition layer 18 includes an opening that exposes the anode 15, wherein the pixel definition layer 18 can cover the edge of the anode 15. The organic light-emitting layer 16 at least partially fills the opening of the pixel definition layer 18 and contacts the anode 15. A cathode 17 is also provided on the pixel definition layer 18, and along the thickness direction of the base substrate 10, the cathode 17 covers the organic light-emitting layer 16. The anode 15, the organic light-emitting layer 16, and the cathode 17 defined by the opening of each pixel definition layer 18 constitute a light-emitting device. Each light-emitting device can emit light of different colors depending on the material of the organic light-emitting layer 16. Each light-emitting device can constitute a sub-pixel, and multiple sub-pixels together display the image, but the present invention is not limited to this.

[0083] To sum up, the display panel provided by the embodiment of the present invention, by arranging, in the area covered by the anode, a maximum distance along the thickness direction of the substrate between the first surface of the second organic layer in the first routing area where the first metal routing is located away from the substrate substrate and the second surface of the second organic layer outside the first routing area away from the substrate substrate is less than the thickness of the first metal routing, so as to reduce the vertical height difference between the first surface of the second organic layer above the first metal routing and the second surface of the second organic layer above the non-first metal routing in the area covered by the anode, thereby improving the flatness of the anode, and further reducing the brightness difference of the organic light-emitting layer when the display panel is viewed at the same tilt angle in different directions, reducing the color deviation difference under the same tilt angle viewing angle in different directions, improving the problem of inconsistent color deviation in four directions, and improving the display effect of the display panel.

[0084] Figure 7 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, optionally, at least in the area where the anode 15 is located, a first groove 19 corresponding to the first metal trace 13 is provided on a side of the first organic layer 12 away from the base substrate 10 , and the first metal trace 13 is provided in the first groove 19 .

[0085] Specifically, such as Figure 7 As shown, at least in the area where the anode 15 is located, a first groove 19 for accommodating the first metal wiring 13 is provided on the first organic layer 12, so that at least part of the thickness of the first metal wiring 13 is located in the first groove 19, thereby reducing the height difference between the surface of the first metal wiring 13 on the side away from the substrate 10 and the surface of the first organic layer 12 outside the first wiring area 131 on the side away from the substrate 10 in the thickness direction of the substrate 10, at least in the area where the anode 15 is located, thereby reducing the height of the protrusion of the anode 15 caused by the first metal wiring 13, improving the flatness of the anode 15, and further reducing the brightness difference of the organic light-emitting layer at the same tilt angle viewing angle in different directions, reducing the color deviation difference at the same tilt angle viewing angle in different directions, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0086] Continue to refer Figure 7 Optionally, the depth d3 of the first groove 19 is less than or equal to the thickness d2 of the first metal trace 13 .

[0087] Among them, by setting the depth d3 of the first groove 19 to be less than or equal to the thickness d2 of the first metal trace 13, the surface of the first metal trace 13 on the side away from the base substrate 10 is prevented from being lower than the surface of the first organic layer 12 outside the first trace area 131 on the side away from the base substrate 10, thereby preventing the anode 15 above the first metal trace 13 from being recessed downward, which is beneficial to improving the flatness of the anode 15, thereby improving the four-directional color deviation problem and improving the display effect of the display panel.

[0088] At the same time, by setting the depth d3 of the first groove 19 to be less than or equal to the thickness d2 of the first metal trace 13 , it is also helpful to reduce the thickness of the first organic layer 12 , thereby facilitating a lightweight and thin design of the display panel.

[0089] It should be noted that Figure 7 In the figure, only the depth d3 of the first groove 19 is equal to the thickness d2 of the first metal wiring 13 as an example to illustrate, so that the surface of the first metal wiring 13 away from the base substrate 10 is at the same height as the surface of the first organic layer 12 outside the first wiring area 131 away from the base substrate 10, that is, the upper surface of the first metal wiring 13 is flush with the upper surface of the first organic layer 12 outside the first wiring area 131, thereby making the anode 15 more flat, solving the problem of four-way color deviation, and improving the display effect of the display panel, but it is not limited to this.

[0090] In other embodiments, the specific value of the depth d3 of the first groove 19 can be set according to actual needs, and the embodiment of the present invention is not limited to this.

[0091] Figure 8 A schematic diagram of a partial structure of a display panel provided by an embodiment of the present invention is provided. Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure along the D-D' direction, as shown in Figure 8 and Figure 9 As shown, optionally, a second groove 40 corresponding to the first metal trace 13 is provided on a side of the second organic layer 14 close to the base substrate 10, and the first metal trace 13 is located in the second groove 40. The display panel also includes a second metal trace 41, which is provided on the same layer as the first metal trace 13. The area where the second metal trace 41 is located is a second trace area 411. The surface of the second organic layer 14 located in the second trace area 411 on the side away from the base substrate 10 is the third surface 23. Along the thickness direction of the base substrate 10, the third surface 23 outside the area where the anode 15 is located is located on the side of the first surface 21 away from the base substrate 10.

[0092] Specifically, such as Figure 8 and Figure 9As shown, by providing a second groove 40 for accommodating the first metal trace 13 on the side of the second organic layer 14 close to the base substrate 10, so that the first metal trace 13 is located in the second groove 40, it is beneficial to reduce the height difference between the surface of the second organic layer 14 in the first trace area 131 on the side away from the base substrate 10 and the surface of the second organic layer 14 outside the first trace area 131 on the side away from the base substrate 10 in the thickness direction of the base substrate 10, thereby reducing the height of the protrusion of the anode 15 caused by the first metal trace 13, improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0093] Further, continue to refer to Figure 8 and Figure 9 A second metal trace 41 is provided on the same layer as the first metal trace 13. The second metal trace 41 can be various traces in the display panel, such as power supply voltage lines, scan signal lines, data signal lines, light control signal lines, etc., and can be set according to the actual display panel structure during specific implementation.

[0094] In this embodiment, outside the area where the anode 15 is located and within the second wiring area 411 where the second metal wiring 41 is located, the third surface 23 of the second organic layer 14 on the side away from the base substrate 10 is located on the side of the first surface 21 in the area where the anode 15 is located away from the base substrate 10; that is, the upper surface of the second organic layer 14 above the first metal wiring 13 in the area where the anode 15 is located is lower than the upper surface of the second organic layer 14 above the second metal wiring 41 outside the area where the anode 15 is located, thereby reducing the height of the upper surface of the second organic layer 14 above the first metal wiring 13 in the area covered by the anode 15, so as to reduce the protrusion of the anode 15 caused by the first metal wiring 13, improve the flatness of the anode 15, and thereby improve the problem of inconsistent color deviation in four directions, thereby improving the display effect of the display panel.

[0095] Figure 10 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 10 As shown, optionally, the first surface 21 is an arc-shaped surface convex toward the side away from the base substrate 10 .

[0096] Specifically, such as Figure 10As shown, by setting the first surface 21 of the second organic layer 14 in the first wiring area 131 where the first metal wiring 13 is located away from the base substrate 10 as an arc surface in the area covered by the anode 15, that is, in the area covered by the anode 15, the upper surface of the second organic layer 14 above the first metal wiring 13 is an arc surface, so as to eliminate the sharp corners on the first surface 21, thereby making the protrusion formed on the anode 15 smoother, which helps to improve the flatness of the anode 15, and further improve the problem of inconsistent color deviation in four directions, thereby improving the display effect of the display panel.

[0097] Continue to refer Figure 10 Optionally, the first surface 21 includes a first vertex position 211, and along the thickness direction of the substrate 10, the distance between the first vertex position 21 and the substrate 10 is greater than the distance between any other position in the first surface 21 and the substrate 10, and the tangent 212 passing through the first vertex position 211 is parallel to the second surface 22.

[0098] Specifically, such as Figure 10 As shown, the first vertex position 211 on the first surface 21 is the highest point of the first surface 21, and the tangent at the first vertex position 21 is parallel to the second surface 22, that is, the tangent at the first vertex position 21 extends in the horizontal direction, which helps to make the first surface 21 around the first vertex position 211 symmetrically distributed, thereby helping to reduce the brightness difference of the organic light-emitting layer above it at the same tilt angle viewing angle in different directions, improve the problem of inconsistent color deviation in four directions, and improve the display effect of the display panel.

[0099] Figure 11 for Figure 4 The cross-sectional structure diagram along the E-E' direction is as follows: Figure 8 、 Figure 9 、 Figure 4 and Figure 11 As shown, optionally, the first metal trace 13 is used to transmit a first type of signal, and the second metal trace 41 is used to transmit a second type of signal. The first type of signal and the second type of signal are the same signal, or the first type of signal and the second type of signal are different signals.

[0100] For example, Figure 8 and Figure 9As shown, the first type of signal transmitted by the first metal wiring 13 and the second type of signal transmitted by the second metal wiring 41 can be different signals, that is, the first metal wiring 13 and the second metal wiring 41 are different signal lines. By being arranged in the area covered by the anode 15, the height of the upper surface of the second organic layer 14 above the first metal wiring 13 is lower than the upper surface of the second organic layer 14 above the second metal wiring 41 outside the area where the anode 15 is located, thereby reducing the protrusion of the anode 15 caused by the first metal wiring 13, improving the flatness of the anode 15, and then improving the problem of inconsistent color deviation in four directions, thereby improving the display effect of the display panel, but is not limited to this.

[0101] In other embodiments, Figure 4 and Figure 11 As shown, the first type of signal transmitted by the first metal wiring 13 and the second type of signal transmitted by the second metal wiring 41 can also be the same signal, that is, the first metal wiring 13 and the second metal wiring 41 are the same signal line. By being arranged in the area covered by the anode 15, the height of the upper surface of the second organic layer 14 above the first metal wiring 13 is lower than the upper surface of the second organic layer 14 above the first metal wiring 13 outside the area where the anode 15 is located, thereby reducing the protrusion of the anode 15 caused by the first metal wiring 13 in the area where the anode 15 is located, improving the flatness of the anode 15, and then improving the problem of inconsistent color deviation in all directions, thereby improving the display effect of the display panel. Those skilled in the art can make settings according to actual needs.

[0102] Figure 12 A schematic diagram of a partial structure of another display panel provided by an embodiment of the present invention, Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along the F-F' direction, as shown in Figure 12 and Figure 13 As shown, optionally, the display panel provided in this embodiment of the present invention further includes a third organic layer 42 and a third metal trace 43. The third organic layer 42 is located between the pixel driving circuit 11 and the first organic layer 12, and the third metal trace 43 is located between the third organic layer 42 and the first organic layer 12. A first via 121 is provided in the first organic layer 12, and the first metal trace 13 is connected to the third metal trace 43 through the first via 121.

[0103] Specifically, such as Figure 12 and Figure 13 As shown, a third organic layer 42 is further provided on the pixel driving circuit 11 . The third organic layer 42 may be made of an organic insulating material known to those skilled in the art to play the role of insulation and planarization.

[0104] A third metal trace 43 is disposed on the third organic layer 42, and a first organic layer 12 is disposed on the third metal trace 43. The first metal trace 13 disposed on the first organic layer 12 is electrically connected to the third metal trace 43 via a first via 121 in the first organic layer 12, thereby enabling cross-line transmission of the first type of signal on the first metal trace 13. Since the third metal trace 43 and the first metal trace 13 are located in different film layers, cross-line transmission of the first type of signal on the first metal trace 13 via the third metal trace 43 can avoid signal lines on the same layer as the first metal trace 13, thereby reducing the difficulty of signal line routing.

[0105] Continue to refer Figure 12 and Figure 13 Optionally, along the thickness direction of the base substrate 10, the anode 15 and the first via 121 at least partially overlap. Within the region where the anode 15 is located, the surface of the second organic layer 14 located in the region where the first via 121 is located, which is away from the base substrate 10, is a fourth surface 24, and the surface of the second organic layer 14 located outside the region where the first via 121 is located, which is away from the base substrate 10, is a fifth surface 25. Along the thickness direction of the base substrate 10, a distance d4 between the fourth surface 24 and the fifth surface 25 is less than or equal to a first preset threshold.

[0106] Among them, such as Figure 12 and Figure 13 As shown, along the thickness direction of the base substrate 10, there is an overlap between the anode 15 and the first via 121. There is no need for the anode 15 to avoid the first via 121, which helps to increase the setting density of the anode 15, thereby increasing the pixel density of the display panel and achieving a better display effect.

[0107] However, since the first via hole 121 is not filled with the material of the first organic layer 12, the second organic layer 14 and the anode 15 above it will be recessed, thereby affecting the flatness of the anode 15, resulting in inconsistent color deviation at the same tilt angle in different directions, that is, there is a problem of inconsistent color deviation in four directions, which will affect the display effect of the display panel.

[0108] In this embodiment, by arranging, in the area covered by the anode 15, a fourth surface 24 of the second organic layer 14 above the first via hole 121 away from the base substrate 10 and a fifth surface 25 of the second organic layer 14 not above the first via hole 121 away from the base substrate 10, the vertical distance along the thickness direction of the base substrate 10 is less than or equal to a first preset threshold value, so as to ensure that the height difference between the fourth surface 24 and the fifth surface 25 remains at a small value, thereby improving the flatness of the anode 15 above the first via hole 121, and further reducing the color deviation difference under the same tilt angle viewing angle in different directions, improving the four-direction color deviation problem, and improving the display effect of the display panel.

[0109] The first preset threshold value may be set according to actual needs to ensure the flatness of the anode 15 above the first via hole 121 .

[0110] Optionally, the first preset threshold is less than or equal to 0.1 μm.

[0111] Among them, by setting the first preset threshold to be less than or equal to 0.1 μm, that is, the height difference between the fourth surface 24 and the fifth surface 25 is maintained at 0.1 μm or less, so as to ensure the flatness of the anode 15 above the first via 121, thereby making the color deviation difference at the same tilt angle viewing angle in different directions difficult to be detected by the human eye, solving the four-directional color deviation problem and improving the display effect of the display panel.

[0112] It should be noted that those skilled in the art can set the specific value of the first preset threshold according to actual needs. It can be understood that the smaller the value of the first preset threshold, the better the flatness of the anode 15 above the first via 121, and the more conducive to improving the four-way color deviation problem and improving the display effect of the display panel.

[0113] Figure 14 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 14 As shown, optionally, the surface of the second organic layer 14 outside the area where the anode 15 is located away from the base substrate 10 is the sixth surface 26 , and at least part of the sixth surface 26 is located on the side of the fifth surface 25 away from the base substrate 10 .

[0114] Specifically, such as Figure 14 As shown, if there is no first via 121 below the sixth surface 26 of the second organic layer 14 on the side away from the base substrate 10 outside the area where the anode 15 is located, then its height is higher than the height of the fifth surface 25, that is, the sixth surface 26 outside the area where the first via 121 is located is higher than the fifth surface 25. In other words, the fifth surface 25 of the second organic layer 14 on the side away from the base substrate 10 in the area where the anode 15 is located but not above the first via 121 is lower than the sixth surface 26 of at least part of the second organic layer 14 on the side away from the base substrate 10 outside the area where the anode 15 is located, so as to reduce the height of the fifth surface 25 of the second organic layer 14 in the area where the anode 15 is located but not above the first via 121, so that the height of the fifth surface 25 is consistent with the height of the fourth surface 24 of the second organic layer 14 above the first via 121, thereby improving the flatness of the anode 15, improving the four-way color shift problem, and improving the display effect of the display panel.

[0115] Figure 15 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 15As shown, optionally, the second organic layer 14 includes a first sub-organic layer 141 and a second sub-organic layer 142 , the second sub-organic layer 142 is located between the first sub-organic layer 141 and the anode 15 , and the second sub-organic layer 142 is located in the area where the first via hole 121 is located.

[0116] Specifically, such as Figure 15 As shown, by setting the second organic layer 14 to include a first sub-organic layer 141 that is set as an entire layer and a second sub-organic layer 142 that is only located in the area where the first via 121 is located, the thickness of the second organic layer 14 in the area where the first via 121 is located is increased, thereby raising the height of the fourth surface 24 of the second organic layer 14 above the first via 121, so that the height of the fourth surface 24 is consistent with the height of the fifth surface 25 of the second organic layer 14 not above the first via 121, thereby improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0117] Figure 16 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 16 As shown, optionally, the fourth surface 24 is an arc-shaped surface that is concave toward the side close to the base substrate 10 .

[0118] Specifically, such as Figure 16 As shown, by setting the fourth surface 24 of the second organic layer 14 above the first via 121 as a downwardly concave arc surface in the area covered by the anode 15, the sharp corners on the fourth surface 24 are eliminated, so that the depression formed by the anode 15 above the fourth surface 24 is smoother, which helps to improve the flatness of the anode 15, and further improves the problem of inconsistent color deviation in four directions, thereby improving the display effect of the display panel.

[0119] Continue to refer Figure 16 Optionally, the fourth surface 24 includes a second vertex position 241. Along the thickness direction of the base substrate 10, the distance between the second vertex position 241 and the base substrate 10 is less than the distance between any other position on the fourth surface 24 and the base substrate 10. Along the thickness direction of the base substrate 10, the distance between the second vertex position 241 and the base substrate 10 is H1, and the distance between the fifth surface 25 and the base substrate 10 is H2, where the difference between H2 and H1 is less than the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal trace 43.

[0120] Specifically, due to the presence of the first via 121, the height difference between the fourth surface 24 of the second organic layer 14 above the first via 121 and the fifth surface 25 of the second organic layer 14 outside the area where the first via 121 is located should be consistent with the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal trace 43.

[0121] In this embodiment, the second vertex position 241 on the fourth surface 24 is the lowest point of the fourth surface 24. By setting the difference between the distance H1 between the second vertex position 241 and the base substrate 10 and the distance H2 between the fifth surface 25 and the base substrate 10 to be smaller than the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal trace 43, the difference between H2 and H1 is reduced, thereby reducing the degree of depression of the anode 15 caused by the first via 121, improving the flatness of the anode 15, and further improving the four-directional color deviation problem, thereby improving the display effect of the display panel.

[0122] Figure 17 A partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present invention is shown in FIG. Figure 17 As shown, optionally, a first protrusion structure 421 corresponding to the first via hole 121 is provided on a side of the third organic layer 42 away from the base substrate 10 .

[0123] Specifically, such as Figure 17 As shown, at least in the area where the anode 15 is located, a first protruding structure 421 is provided on the third organic layer 42 in the area where the first via 121 is located to raise the height of the third metal trace 43 in the area where the first via 121 is located, thereby reducing the degree of depression of the second organic layer 14 and the anode 15 in the area where the first via 121 is located, improving the flatness of the anode 15, improving the problem of four-way color deviation, and improving the display effect of the display panel.

[0124] Continue to refer Figure 17 Optionally, a thickness d6 of the first protruding structure 421 is less than or equal to a difference d5 between a thickness of the first organic layer 12 and a thickness of the third metal trace 43 .

[0125] Among them, by setting the thickness d6 of the first protruding structure 421 to be less than or equal to the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal wiring 43, it is avoided that the surface of the third metal wiring 43 in the area where the first via 121 is located on the side away from the base substrate 10 is higher than the upper surface of the first organic layer 12 outside the area where the first via 121 is located, thereby avoiding the second organic layer 14 and the anode 15 in the area where the first via 121 is located from protruding upward, which is beneficial to improving the flatness of the anode 15, thereby improving the four-directional color deviation problem and improving the display effect of the display panel.

[0126] At the same time, by setting the thickness d6 of the first protruding structure 421 to be less than or equal to the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal trace 43, it also helps to reduce the thickness of the third organic layer 42, thereby facilitating a lightweight design of the display panel.

[0127] It should be noted that Figure 17 In the figure, only the example of the thickness d6 of the first protruding structure 421 being less than the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal wiring 43 is used for illustration. In other embodiments, the thickness d6 of the first protruding structure 421 may also be equal to the difference d5 between the thickness of the first organic layer 12 and the thickness of the third metal wiring 43, so that the surface of the third metal wiring 43 in the area where the first via 121 is located away from the side of the base substrate 10 is at the same height as the upper surface of the first organic layer 12 outside the area where the first via 121 is located, that is, the upper surface of the third metal wiring 43 in the area where the first via 121 is located is flush with the upper surface of the first organic layer 12 outside the area where the first via 121 is located, thereby making the anode 15 smoother, solving the problem of four-way color deviation, and improving the display effect of the display panel, but it is not limited to this.

[0128] The specific value of the thickness d6 of the first protruding structure 421 can be set according to actual needs, and is not limited in this embodiment of the present invention.

[0129] Figure 18 A schematic structural diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 18 As shown, optionally, the display panel provided by an embodiment of the present invention includes a display area 50 and a non-display area 51 located at least on one side of the display area 50. The display panel also includes a plurality of first signal lines 52, a plurality of connecting traces 53 and a plurality of signal wirings 54. The connecting traces 53 are electrically connected to the first signal lines 52 and the signal wirings 54, respectively. The first signal lines 52 and the connecting traces 53 are located in the display area 50, and the signal wirings 54 are located in the non-display area 51. The connecting traces 53 include a first sub-trace 531 and a second sub-trace 532 that are interconnected. The extension direction of the second sub-trace 532 is parallel to the extension direction of the first signal line 52, and the extension direction of the first sub-trace 531 intersects with the extension direction of the second sub-trace 532. The first metal trace 13 includes the second sub-trace 532, and the third metal trace 43 includes the first sub-trace 531.

[0130] Specifically, the display panel includes a display area 50 and a non-display area 51. Figure 18 As shown, the non-display area 51 may be a lower frame area located on one side of the display area 50 , but is not limited thereto. The embodiment of the present invention does not specifically limit the positional relationship between the display area 50 and the non-display area 51 .

[0131] The display area 50 includes sub-pixels 55 arranged in an array and first signal lines 52 connected to the sub-pixels 55. The first signal lines 52 are used to transmit display signals to the sub-pixels 55 to implement the display function of the display panel. The first signal lines 52 can be data lines or scan lines to transmit display signals such as data signals or scan signals to the sub-pixels 55, and this embodiment is not specifically limited to this.

[0132] The non-display area 51 includes a display controller connected to the first signal line 52, such as a driver chip (not specifically shown in the figure), which provides display signals such as data signals or scan signals to the first signal line 52, thereby driving the display panel to realize the display function.

[0133] Furthermore, if Figure 18 As shown, the display area 50 is further provided with a plurality of connecting wires 53, and the non-display area 51 is further provided with a plurality of signal wirings 54, wherein the first signal line 52 and the signal wiring 54 are electrically connected through the connecting wires 53 to ensure normal transmission of the display signal.

[0134] Among them, the connecting line 53 is arranged in the display area 50, which is different from the solution in the prior art that the connecting line 53 is arranged in the non-display area 51 at the R corner. It can reduce the number of lines in the non-display area 51 at the R corner, thereby helping to reduce the area used for wiring in the non-display area 51 at the R corner and realize a narrow frame design.

[0135] Continue to refer Figure 18 The connecting line 53 includes a first sub-line 531 and a second sub-line 532 that are interconnected and have intersecting extension directions, so that the first signal line 52 in the display area 50 and the signal wiring 54 in the non-display area 51 are electrically connected through the connecting line 53 to realize the transmission of the display signal.

[0136] In this embodiment, the first metal routing 13 serves as the second sub-routing 532, and the third metal routing 43 serves as the first sub-routing 531, that is, the first sub-routing 531 is located between the third organic layer 42 and the first organic layer 12, and the second sub-routing 532 is connected to the first sub-routing 531 through the first via 121 on the first organic layer 12.

[0137] The structure of the first metal routing 13 provided in any of the above embodiments is applicable to the first sub-routing 531, and the structure of the third metal routing 43 provided in any of the above embodiments is applicable to the first sub-routing 531, so as to improve the flatness of the anode 15 while realizing a narrow frame design, improve the four-way color deviation problem, and improve the display effect of the display panel, which will not be repeated here.

[0138] Figure 19 A schematic structural diagram of another display panel provided by an embodiment of the present invention is shown. Figure 20 for Figure 19 Schematic diagram of the enlarged structure at G, Figure 21 for Figure 20 Schematic diagram of the cross-sectional structure along the I-I' direction, as shown in Figures 19-21As shown, optionally, the display panel provided in this embodiment of the present invention further includes a red sub-pixel 551, a green sub-pixel 552, and a blue sub-pixel 553. The anode 15 includes a first anode 151 and a second anode 152. The first anode 151 is located in the red sub-pixel 551 and / or the blue sub-pixel 553, and the second anode 152 is located in the green sub-pixel 552. Along the thickness direction of the base substrate 10, the first anode 151 at least partially overlaps with the two first metal traces 13, wherein the two first metal traces 13 are a first trace 13A and a second trace 13B. In the region where the first anode 151 is located, the first trace 13A is connected to the third metal trace 43 through a first via 121, and the second trace 13B includes a pattern portion 130 corresponding to the first via 121. In the area where the first anode 151 is located, the surface of the second organic layer 14 in the area where the first via 121 is located, which is away from the base substrate 10, is the seventh surface 27; the surface of the second organic layer 14 in the area where the pattern portion 130 is located, which is away from the base substrate 10, is the eighth surface 28; the surface of the second organic layer 14 outside the area where the first via 121 and the area where the pattern portion 130 are located, which is away from the base substrate 10, is the ninth surface 29. Along the thickness direction of the base substrate 10, the distance between the seventh surface 27 and the base substrate 10 is smaller than the distance between the ninth surface 29 and the base substrate 10, and the distance between the eighth surface 28 and the base substrate 10 is equal to the distance between the ninth surface 29 and the base substrate 10.

[0139] Specifically, such as Figures 19-21 As shown, the display area 50 is provided with red sub-pixels 551, green sub-pixels 552 and blue sub-pixels 553 arranged in an array to display a color image.

[0140] The anode 15 in the red sub-pixel 551 and / or the blue sub-pixel 553 is a first anode 151, and the anode 15 in the green sub-pixel 552 is a second anode 152. Figures 19-21 As shown, for example, the first metal trace 13 may also include the first signal line 52, i.e., the second sub-trace 532 is disposed on the same layer as the first signal line 52, thereby eliminating one metal layer, thereby reducing production costs and the thickness of the display panel. Furthermore, the second sub-trace 532 and the first signal line 52 may be fabricated in the same process, thereby shortening the manufacturing process time, but this is not limited to this.

[0141] The structure of the first metal trace 13 provided in any of the above embodiments is applicable to the first signal line 52 to improve the flatness of the anode 15, improve the four-way color deviation problem, and enhance the display effect of the display panel, which will not be repeated here.

[0142] Continue to refer Figures 19-21The first anode 151 at least partially overlaps the first wiring 13A and the second wiring 13B, wherein the first wiring 13A may be the second sub-wiring 532 and the second wiring 13B may be the first signal line 52, but is not limited thereto.

[0143] Furthermore, if Figures 19-21 As shown, the first via 121 is located in the area where the first anode 151 is located, and the first trace 13A is connected to the third metal trace 43 through the first via 121. The first via 121 may not be set in the area where the second anode 152 is located. Such a setting can make the distribution of the first via 121 more dispersed, thereby avoiding the first via 121 being arranged too concentratedly and affecting the overall visual effect of the display panel.

[0144] Continue to refer Figures 19-21 Due to process limitations, the width of the first trace 13A at the first via 12 is increased to ensure reliable connection between the first trace 13A and the third metal trace 43 at the first via 12. The increased width of the first trace 13A at the first via 12 results in increased light reflected from the first trace 13A at the first via 12, leading to different light reflections from the first trace 13A and the second trace 13B, thus affecting the overall visual effect of the display panel.

[0145] In this embodiment, by providing the pattern portion 130 corresponding to the first via hole 121 on the second trace 13B, the reflected light of the first trace 13A and the second trace 13B tends to be consistent, which is beneficial to improving the overall visual effect of the display panel.

[0146] Specifically, such as Figure 20 As shown, the shape of the pattern division 130 is the same as the pattern shape of the first trace 13A at the first via 12, and the pattern division 130 is adjacent to and symmetrically arranged with the pattern of the first trace 13A at the first via 12 to ensure that the reflected light of the first trace 13A and the second trace 13B tends to be consistent, which is beneficial to improving the overall visual effect of the display panel, but is not limited to this.

[0147] Continue to refer Figures 19-21In the area where the first anode 151 is located, due to the presence of the first via 121, the seventh surface 27 of the second organic layer 14 in the area where the first via 121 is located, which is located away from the base substrate 10, is lower than the ninth surface 29 of the second organic layer 14 in the area where the first via 121 is located and which is located outside the area where the pattern portion 130 is located, which is located away from the base substrate 10. In this embodiment, the eighth surface 28 of the second organic layer 14 in the area where the pattern portion 130 is located, which is located away from the base substrate 10, is flush with the ninth surface 29 of the second organic layer 14 in the area where the first via 121 is located and which is located outside the area where the pattern portion 130 is located. That is, the eighth surface 28 of the second organic layer 14 above the pattern portion 130 is flush with the ninth surface 29 of the second organic layer 14 in the surrounding area excluding the first via 121. This prevents the pattern portion 130 from affecting the flatness of the first anode 151, helps to improve the four-way color shift problem, and enhances the display quality of the display panel.

[0148] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Figure 22 A schematic structural diagram of a display device provided by an embodiment of the present invention is shown in FIG. Figure 22 As shown, the display device 60 includes the display panel 61 described in any embodiment of the present invention. Therefore, the display device 60 provided by the embodiment of the present invention has the technical effect of the technical solution in any of the above embodiments, and the structures and terminology that are the same or corresponding to the above embodiments are not repeated here.

[0149] The display device 60 provided in the embodiment of the present invention can be Figure 22 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0150] Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing a display panel, which is used to prepare any display panel provided by the above embodiments. The explanation of the structures and terms that are the same or corresponding to the above embodiments will not be repeated here.

[0151] Figure 23 A schematic diagram of a method for manufacturing a display panel according to an embodiment of the present invention is shown in FIG. Figure 23 As shown, the method includes:

[0152] Step 110: Prepare a pixel driving circuit on one side of the base substrate.

[0153] Specifically, such as Figure 3-Figure 5As shown, the base substrate 10 can be a rigid base substrate or a flexible base substrate, wherein the rigid base substrate can be a glass base substrate or a silicon base substrate, and the flexible base substrate can be a stainless steel base substrate or a polyimide base substrate, but is not limited thereto. The base substrate 10 can also adopt other types of base substrates known to those skilled in the art, and the embodiments of the present invention are not limited thereto.

[0154] A pixel driving circuit 11 is prepared on a base substrate 10. The pixel driving circuit 11 may include a thin film transistor T and a storage capacitor (not shown in the figure). The thin film transistor T may include multiple film layers for forming the pixel driving circuit 11, for example, Figure 5 As shown, the thin film transistor T includes an active layer 31 , a gate layer 32 , a source / drain electrode layer 33 , and a plurality of insulating layers for insulating the electrodes from each other.

[0155] Among them, the thin film transistor T can adopt a bottom gate structure or a top gate structure; the pixel driving circuit 11 can be a 1T1C circuit, a 2T1C circuit, a 7T1C circuit or other types of pixel driving circuits known to those skilled in the art. On this basis, the vertical film layer structure of the thin film transistor layer can be set according to the actual requirements of the display panel, and the embodiment of the present invention is not limited to this.

[0156] Step 120 : preparing a first organic layer on a side of the pixel driving circuit away from the base substrate.

[0157] Specifically, such as Figure 3-Figure 5 As shown, a first organic layer 12 is prepared on the pixel driving circuit 11. The first organic layer 12 can be made of an organic insulating material known to those skilled in the art to play the role of insulation and planarization.

[0158] Step 130 : preparing a first metal trace on a side of the first organic layer away from the pixel driving circuit.

[0159] Specifically, such as Figure 3-Figure 5 As shown, a first metal wiring 13 is prepared on the first organic layer 12. The first metal wiring 13 can be various wirings in the display panel, such as power voltage lines, scanning signal lines, data signal lines, light-emitting control signal lines, etc., and can be set according to the actual display panel structure during specific implementation.

[0160] Step 140: Prepare a second organic layer on the side of the first metal trace away from the pixel driving circuit, wherein the area where the first metal trace is located is the first trace area; within the area where the anode is located, the surface of the second organic layer located in the first trace area away from the base substrate is the first surface, and the surface of the second organic layer located outside the first trace area away from the base substrate is the second surface, and along the thickness direction of the base substrate, the distance between the first surface and the second surface is less than the thickness of the first metal trace.

[0161] Specifically, such as Figure 3-Figure 5 As shown, a second organic layer 14 is prepared on the first metal trace 13. The second organic layer 14 may include organic materials such as acrylic, polyimide (PI) or benzocyclobutene (BCB) to play an insulating and planarizing role, but is not limited thereto.

[0162] Step 150 : preparing an anode on a side of the second organic layer away from the pixel driving circuit, wherein the anode at least partially overlaps with the first metal trace along the thickness direction of the base substrate.

[0163] Specifically, such as Figure 3-Figure 5 As shown, an anode 15 is prepared on the second organic layer 14 , each anode 15 corresponds to a sub-pixel, and the anode 15 can be electrically connected to the source-drain electrode layer 33 of the thin film transistor T through a via hole on the second organic layer 14 .

[0164] The anode 15 can be formed of various conductive materials. For example, the anode 15 can be formed as a transparent electrode or a reflective electrode according to its purpose. When the anode 15 is formed as a transparent electrode, it can include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) or indium oxide (In2O3), etc. When the anode 15 is formed as a reflective electrode, the reflective layer can be formed of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr) or a mixture thereof, and ITO, IZO, ZnO or In2O3 can be formed on the reflective layer, but is not limited to this. The embodiment of the present invention does not limit this.

[0165] Continue to refer Figure 4 and Figure 5 Along the thickness direction of the base substrate 10, there is an overlap between the anode 15 and the first metal trace 13. Such a setting helps to increase the setting density of the anode 15, thereby increasing the pixel density of the display panel and achieving a better display effect.

[0166] Since the distance between the first metal trace 13 and the anode 15 is relatively close, the provision of the first metal trace 13 will affect the flatness of the anode 15. Therefore, in this embodiment, along the thickness direction of the base substrate 10, within the area covered by the anode 15, the maximum distance d1 along the thickness direction of the base substrate 10 between the first surface 21 of the second organic layer 14 in the first trace region 131 where the first metal trace 13 is located, which is away from the base substrate 10, and the second surface 22 of the second organic layer 14 outside the first trace region 131, which is away from the base substrate 10, is less than the thickness d2 of the first metal trace 13. That is, within the area covered by the anode 15, the vertical height difference between the upper surface of the second organic layer 14 above the first metal trace 13 and the upper surface of the second organic layer 14 not above the first metal trace 13 is less than the thickness d2 of the first metal trace 13. Compared with the prior art, the height of the first surface 21 of the second organic layer 14 in the first wiring area 131 where the first metal wiring 13 is located is lowered relative to the second surface 22 in the area covered by the anode 15. That is, in the area covered by the anode 15, the vertical height difference between the upper surface of the second organic layer 14 above the first metal wiring 13 and the upper surface of the second organic layer 14 above the non-first metal wiring 13 is reduced, thereby improving the flatness of the anode 15. When the display panel is viewed at the same tilt angle in different directions, the brightness difference of the organic light-emitting layer 16 is reduced, the color deviation difference at the same tilt angle viewing angle in different directions is reduced, the four-direction color deviation problem is improved, and the display effect of the display panel is improved.

[0167] Figure 24 A schematic diagram of the process structure of a method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 24 As shown, optionally, a first organic layer 12 is formed on a side of the pixel driving circuit 11 away from the base substrate 10, including:

[0168] A first organic material layer 120 is formed on a side of the pixel driving circuit 11 away from the base substrate 10 .

[0169] At least in the area where the anode 15 is located, a first groove 19 corresponding to the first metal wiring 13 is prepared on the first organic material layer 120 to form the first organic layer 12 .

[0170] Specifically, such as Figure 24As shown, at least in the area where the anode 15 is located, a first groove 19 for accommodating the first metal wiring 13 is prepared on the first organic material layer 120, so that at least part of the thickness of the first metal wiring 13 is located in the first groove 19, thereby reducing the height difference between the surface of the first metal wiring 13 on the side away from the substrate 10 and the surface of the first organic layer 12 outside the first wiring area 131 on the side away from the substrate 10 in the thickness direction of the substrate 10, at least in the area where the anode 15 is located, thereby reducing the height of the anode 15 protrusion caused by the first metal wiring 13, improving the flatness of the anode 15, and further reducing the brightness difference of the organic light-emitting layer at the same tilt angle viewing angle in different directions, reducing the color deviation difference at the same tilt angle viewing angle in different directions, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0171] Continue to refer Figure 24 Optionally, forming a first groove 19 corresponding to the first metal trace 13 on the first organic material layer 120 includes:

[0172] The first organic material layer 120 is exposed using a first multi-tone mask plate 71 , wherein the first multi-tone mask plate 71 includes a first light shielding portion 711 and a first exposure portion 712 corresponding to the first groove 19 , and the light transmittance of the first exposure portion 712 is greater than the light transmittance of the first light shielding portion 711 .

[0173] Specifically, such as Figure 24 As shown, the first organic material layer 120 is exposed and developed using a first multi-tone mask 71, and the first organic material layer 120 corresponding to the first exposure portion 712 is etched to a greater extent than the first organic material layer 120 corresponding to the first light shielding portion 711, thereby forming a first groove 19, wherein the first multi-tone mask 71 can be a halftone mask (Halftone Mask, HTM) or a graytone mask (Graytone Mask, GTM), but is not limited thereto.

[0174] Figure 25 A schematic diagram of the process structure of another method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 25 As shown, optionally, a second organic layer 14 is formed on a side of the first metal trace 13 away from the pixel driving circuit 11, including:

[0175] A second organic material layer 140 is formed on a side of the first metal wiring 13 away from the pixel driving circuit 11 .

[0176] At least in the area where the anode 15 is located, the second organic material layer 140 in the first wiring area 131 is thinned to form the second organic layer 14 .

[0177] Specifically, such as Figure 25 As shown, the first metal wiring 13 below the second organic material layer 140 will cause the second organic material layer 140 in the first wiring area 131 to bulge upward. In this embodiment, at least in the area where the anode 15 is located, the thickness of the second organic layer 14 in the first wiring area 131 is thinned to reduce the bulging height of the first surface 21 of the second organic layer 14 in the first wiring area 131, thereby reducing the bulging height of the anode 15 caused by the first metal wiring 13, improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0178] Continue to refer Figure 25 Optionally, thinning the second organic material layer 140 in the first wiring region 131 includes:

[0179] The second organic material layer 140 is exposed using a second multi-tone mask plate 72 , wherein the second multi-tone mask plate 72 includes a second light shielding portion 721 and a second exposure portion 722 corresponding to the first wiring area 131 , and the light transmittance of the second exposure portion 722 is greater than the light transmittance of the second light shielding portion 721 .

[0180] Specifically, such as Figure 25 As shown, a second multi-tone mask plate 72 is used to perform exposure and development operations on the second organic material layer 140, and the second organic material layer 140 corresponding to the second exposure portion 722 is etched to a greater extent than the second organic material layer 140 corresponding to the second light shielding portion 721, thereby thinning the second organic material layer 140 in the first wiring area 131 to a greater extent, wherein the second multi-tone mask plate 72 can be a halftone mask plate (Halftone Mask, HTM) or a gray tone mask plate (Graytone Mask, GTM), but is not limited to this.

[0181] Figure 26 A schematic diagram of the process structure of another method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 26 As shown, optionally, before forming the first organic layer 12 on the side of the pixel driving circuit 11 away from the base substrate 10, the method further includes:

[0182] A third organic layer 42 is formed on a side of the pixel driving circuit 11 away from the base substrate 10 .

[0183] A third metal wiring 43 is formed on a side of the third organic layer 42 away from the pixel driving circuit 11 .

[0184] A first organic layer 12 is prepared on a side of the pixel driving circuit 11 away from the base substrate 10 , including:

[0185] A first organic material layer 120 is formed on a side of the third metal trace 43 away from the third organic layer 42 .

[0186] A first via hole 121 is prepared on the first organic material layer 120 to form the first organic layer 12 . The first via hole 121 is used to connect the first metal trace 13 and the third metal trace 43 .

[0187] Specifically, such as Figure 26 As shown, a third organic layer 42 is prepared on the pixel driving circuit 11. The third organic layer 42 can be made of an organic insulating material known to those skilled in the art to play the role of insulation and planarization.

[0188] A third metal trace 43 is formed on the third organic layer 42, a first organic material layer 120 is formed on the third metal trace 43, and a first via 121 is formed in the first organic material layer 120 to form the first organic layer 12, so that the first metal trace 13 is electrically connected to the third metal trace 43 through the first via 121. Since the third metal trace 43 and the first metal trace 13 are located in different film layers, by arranging the first type of signal on the first metal trace 13 to be transmitted across the third metal trace 43, signal lines on the same layer as the first metal trace 13 can be avoided, thereby reducing the difficulty of signal line routing.

[0189] Figure 27 A schematic diagram of the process structure of another method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 27 As shown, optionally, a second organic layer 14 is formed on a side of the first metal trace 13 away from the pixel driving circuit 11, including:

[0190] A second organic material layer 140 is formed on a side of the first metal trace 13 away from the third organic layer 42 .

[0191] At least in the area where the anode 15 is located, the second organic material layer 140 outside the area where the first via hole 121 is located is thinned to form the second organic layer 14 .

[0192] Specifically, such as Figure 27 As shown, the first via hole 121 below the second organic material layer 140 will cause the second organic material layer 140 to be recessed downward in the area where the first via hole 121 is located. In this embodiment, at least in the area where the anode 15 is located, the second organic material layer 140 outside the area where the first via hole 121 is located is thinned to form the second organic layer 14, and the thickness of the second organic material layer 140 outside the area where the first via hole 121 is located is reduced to offset the recess caused by the first via hole 121, so that the second organic layer 14 maintains good flatness, thereby reducing the degree of recess of the anode 15 caused by the first via hole 121, improving the flatness of the anode 15, improving the four-way color deviation problem, and improving the display effect of the display panel.

[0193] Continue to refer Figure 27 Optionally, thinning the second organic material layer 140 outside the area where the first via hole 121 is located includes:

[0194] The second organic material layer 140 is exposed using a third multi-tone mask plate 73, wherein the third multi-tone mask plate 73 includes a third exposure portion 731 and a third light shielding portion 732 corresponding to the area where the first via 121 is located, and the light transmittance of the third exposure portion 731 is greater than the light transmittance of the third light shielding portion 732.

[0195] Specifically, such as Figure 27 As shown, the third multi-tone mask plate 73 is used to perform exposure and development operations on the second organic material layer 140, and the second organic material layer 140 corresponding to the third exposure portion 731 is etched to a greater extent than the second organic material layer 140 corresponding to the third light shielding portion 732, thereby thinning the second organic material layer 140 outside the area where the first via 121 is located to a greater extent, wherein the third multi-tone mask plate 73 can be a halftone mask plate (Halftone Mask, HTM) or a gray tone mask plate (Graytone Mask, GTM), but is not limited to this.

[0196] Figure 28 A schematic diagram of the process structure of another method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 28 As shown, optionally, a second organic layer 14 is formed on a side of the first metal trace 13 away from the pixel driving circuit 11, including:

[0197] A first sub-organic layer 141 is formed on a side of the first metal trace 13 away from the third organic layer 42 .

[0198] A second sub-organic layer 142 is formed on a side of the first sub-organic layer 141 away from the third organic layer 42 to form the second organic layer 14 , wherein the second sub-organic layer 142 is located in the area where the first via hole 121 is located.

[0199] Specifically, such as Figure 28 As shown, a first sub-organic layer 141 is prepared as a whole layer on the first metal wiring 13, and a second sub-organic layer 142 is prepared on the first sub-organic layer 141 only in the area where the first via 121 is located, so as to increase the thickness of the second organic layer 14 in the area where the first via 121 is located, thereby raising the height of the fourth surface 24 of the second organic layer 14 above the first via 121, so that the height of the fourth surface 24 is consistent with the height of the fifth surface 25 of the second organic layer 14 not above the first via 121, thereby improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0200] Figure 29 A schematic diagram of the process structure of another method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 29 As shown, optionally, a third organic layer 42 is formed on a side of the pixel driving circuit 11 away from the base substrate 10, including:

[0201] A third organic material layer 420 is formed on a side of the pixel driving circuit 11 away from the base substrate 10 ;

[0202] At least in the area where the anode 15 is located, a first protrusion structure 421 corresponding to the first via hole 121 is prepared on a side of the third organic material layer 420 away from the base substrate 10 to form a third organic layer 42 .

[0203] Specifically, such as Figure 29 As shown, at least in the area where the anode 15 is located, a third organic layer 42 is formed by preparing a first protruding structure 421 located in the area where the first via 121 is located in the third organic material layer 420, thereby offsetting the depression of the first metal trace 13 caused by the first via 121, so that the second organic layer 14 can maintain good flatness, thereby reducing the degree of depression of the anode 15 in the area where the first via 121 is located, improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0204] Continue to refer Figure 29 Optionally, a first protrusion structure 421 corresponding to the first via hole 121 is formed on a side of the third organic material layer 420 away from the base substrate 10 , including:

[0205] The third organic material layer 420 is exposed using a fourth multi-tone mask plate 74, wherein the fourth multi-tone mask plate 74 includes a fourth exposure portion 741 and a fourth light shielding portion 742 corresponding to the area where the first via 121 is located, and the light transmittance of the fourth exposure portion 741 is greater than the light transmittance of the fourth light shielding portion 742.

[0206] Specifically, such as Figure 29 As shown, the fourth multi-tone mask plate 74 is used to perform exposure and development operations on the third organic material layer 420, and the third organic material layer 420 corresponding to the fourth exposure portion 741 is etched to a greater extent than the third organic material layer 420 corresponding to the fourth light shielding portion 742, thereby thinning the third organic material layer 420 outside the area where the first via 121 is located to a greater extent, and forming a first protruding structure 421 on the third organic material layer 420 corresponding to the fourth light shielding portion 742, wherein the fourth multi-tone mask plate 74 can be a halftone mask plate (Halftone Mask, HTM) or a gray tone mask plate (Graytone Mask, GTM), but is not limited thereto.

[0207] It should be understood that the various forms of processes shown above can be used in combination to achieve the desired results of the technical solution of the present invention.

[0208] For example, Figure 30 A schematic diagram of the process structure of another method for manufacturing a display panel provided by an embodiment of the present invention is shown in FIG. Figure 30 As shown, when preparing the second organic layer 14, a second organic material layer 140 is prepared on the side of the first metal wiring 13 away from the pixel driving circuit 11, and the second organic material layer 140 is exposed using a fifth multi-tone mask plate 75, wherein the fifth multi-tone mask plate 75 includes a first division 751, a second division 752 corresponding to the first wiring area 131, and a third division 753 corresponding to the area where the first via 121 is located, wherein the light transmittance of the second division 752 is greater than the light transmittance of the first division 751, and the light transmittance of the first division 751 is greater than the light transmittance of the third division 753.

[0209] like Figure 30 As shown, the fifth multi-tone mask plate 75 is used to perform exposure and development operations on the second organic material layer 140, and the second organic material layer 140 corresponding to the second division 752 is etched to a greater extent than the second organic material layer 140 corresponding to the first division 751, thereby thinning the second organic material layer 140 in the first wiring area 131 to a greater extent, so as to reduce the protrusion height of the first surface 21 of the second organic layer 14 in the first wiring area 131, and further reduce the protrusion height of the anode 15 caused by the first metal wiring 13, thereby improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0210] The second organic material layer 140 corresponding to the first division 751 is etched to a greater extent than the second organic material layer 140 corresponding to the third division 753, thereby thinning the second organic material layer 140 outside the area where the first via 121 is located to a greater extent to offset the depression caused by the first via 121, so that the second organic layer 14 maintains good flatness, thereby reducing the degree of depression of the anode 15 caused by the first via 121, improving the flatness of the anode 15, improving the four-directional color deviation problem, and improving the display effect of the display panel.

[0211] The fifth multi-tone mask 75 may be a halftone mask (HTM) or a gray tone mask (GTM), but is not limited thereto.

[0212] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0213] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; A pixel driving circuit is located on one side of the substrate; A first organic layer is located on a side of the pixel driving circuit away from the base substrate; a first metal wiring, located on a side of the first organic layer away from the pixel driving circuit; a second organic layer, located on a side of the first metal wiring away from the pixel driving circuit; an anode, located on a side of the second organic layer away from the pixel driving circuit, and at least partially overlapping the first metal trace along the thickness direction of the base substrate; The area where the first metal wiring is located is the first wiring area; In the region where the anode is located, a surface of the second organic layer located in the first wiring region and away from the base substrate is a first surface, and a surface of the second organic layer located outside the first wiring region and away from the base substrate is a second surface, and along the thickness direction of the base substrate, a distance between the first surface and the second surface is less than a thickness of the first metal wiring; The display panel further includes a third organic layer and a third metal wiring, the third organic layer is located between the pixel driving circuit and the first organic layer, and the third metal wiring is located between the third organic layer and the first organic layer; A first via hole is provided on the first organic layer, and the first metal trace is connected to the third metal trace through the first via hole; The second organic layer includes a first sub-organic layer and a second sub-organic layer. The second sub-organic layer is located between the first sub-organic layer and the anode, and the second sub-organic layer is located in the area where the first via hole is located.

2. The display panel according to claim 1, wherein: At least in the region where the anode is located, a first groove corresponding to the first metal wiring is provided on a side of the first organic layer away from the base substrate, and the first metal wiring is provided in the first groove.

3. The display panel according to claim 2, wherein: The depth of the first groove is less than or equal to the thickness of the first metal trace.

4. The display panel according to claim 1, wherein: A second groove corresponding to the first metal trace is provided on a side of the second organic layer close to the base substrate, and the first metal trace is located in the second groove; The display panel further includes a second metal wiring, wherein the second metal wiring is provided in the same layer as the first metal wiring; The area where the second metal wiring is located is a second wiring area, and the surface of the second organic layer located in the second wiring area on a side away from the base substrate is a third surface; Along the thickness direction of the base substrate, the third surface outside the region where the anode is located is located on a side of the first surface away from the base substrate.

5. The display panel according to claim 4, wherein: The first surface is an arc-shaped surface convex toward a side away from the base substrate.

6. The display panel according to claim 5, wherein: The first surface includes a first vertex position, and along the thickness direction of the substrate, a distance between the first vertex position and the substrate is greater than a distance between any other position on the first surface and the substrate; A tangent line passing through the first vertex position is parallel to the second surface.

7. The display panel according to claim 4, wherein: The first metal trace is used to transmit a first type of signal, and the second metal trace is used to transmit a second type of signal; The first type of signal and the second type of signal are the same signal, or the first type of signal and the second type of signal are different signals.

8. The display panel according to claim 1, wherein: Along the thickness direction of the base substrate, the anode and the first via hole at least partially overlap; In the region where the anode is located, a surface of the second organic layer located in the region where the first via hole is located and away from the base substrate is a fourth surface, and a surface of the second organic layer located outside the region where the first via hole is located and away from the base substrate is a fifth surface; Along the thickness direction of the base substrate, a distance between the fourth surface and the fifth surface is less than or equal to a first preset threshold.

9. The display panel according to claim 8, wherein: The first preset threshold is less than or equal to 0.1 μm.

10. The display panel according to claim 8, wherein A surface of the second organic layer outside the region where the anode is located and away from the base substrate is a sixth surface, and at least a portion of the sixth surface is located on a side of the fifth surface away from the base substrate.

11. The display panel according to claim 8, wherein The fourth surface is an arc-shaped surface that is concave toward a side close to the base substrate.

12. The display panel according to claim 11, wherein: The fourth surface includes a second vertex position, and along the thickness direction of the base substrate, a distance between the second vertex position and the base substrate is smaller than a distance between any other position on the fourth surface and the base substrate; Along the thickness direction of the base substrate, the distance between the second vertex position and the base substrate is H1, and the distance between the fifth surface and the base substrate is H2, wherein the difference between H2 and H1 is smaller than the difference between the thickness of the first organic layer and the thickness of the third metal trace.

13. The display panel according to claim 1, wherein The display panel includes a display area and a non-display area located at least on one side of the display area; The display panel further includes a plurality of first signal lines, a plurality of connecting lines and a plurality of signal wirings; The connecting wires are electrically connected to the first signal line and the signal wiring respectively; The first signal line and the connection line are located in the display area, and the signal wiring is located in the non-display area; The connecting routing line includes a first sub-routing line and a second sub-routing line connected to each other, wherein an extension direction of the second sub-routing line is parallel to an extension direction of the first signal line, and an extension direction of the first sub-routing line intersects an extension direction of the second sub-routing line; The first metal routing includes the second sub-routing, and the third metal routing includes the first sub-routing.

14. The display panel according to claim 13, wherein: The display panel further includes a red sub-pixel, a green sub-pixel and a blue sub-pixel; The anode includes a first anode and a second anode, the first anode is located in the red sub-pixel and / or the blue sub-pixel, and the second anode is located in the green sub-pixel; Along the thickness direction of the base substrate, the first anode at least partially overlaps with two first metal traces, wherein the two first metal traces are a first trace and a second trace respectively; In the area where the first anode is located, the first wiring is connected to the third metal wiring through the first via hole, and the second wiring includes a pattern portion corresponding to the first via hole; In the region where the first anode is located, a surface of the second organic layer in the region where the first via hole is located, away from the base substrate, is a seventh surface; a surface of the second organic layer in the region where the pattern portion is located, away from the base substrate, is an eighth surface; and a surface of the second organic layer outside the region where the first via hole is located and the region where the pattern portion is located, away from the base substrate, is a ninth surface; Along the thickness direction of the base substrate, the distance between the seventh surface and the base substrate is smaller than the distance between the ninth surface and the base substrate, and the distance between the eighth surface and the base substrate is equal to the distance between the ninth surface and the base substrate.

15. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 14.

16. A method for preparing a display panel, characterized in that: include: Prepare a pixel driving circuit on one side of the base substrate; Prepare a first organic layer on a side of the pixel driving circuit away from the base substrate; preparing a first metal trace on a side of the first organic layer away from the pixel driving circuit; A second organic layer is formed on a side of the first metal trace away from the pixel driving circuit, wherein the area where the first metal trace is located is a first trace area; within the area where the anode is located, a surface of the second organic layer located in the first trace area on a side away from the base substrate is a first surface, and a surface of the second organic layer located outside the first trace area on a side away from the base substrate is a second surface, and along the thickness direction of the base substrate, a distance between the first surface and the second surface is less than the thickness of the first metal trace; The anode is formed on a side of the second organic layer away from the pixel driving circuit, and the anode at least partially overlaps with the first metal trace along the thickness direction of the base substrate; Before forming the first organic layer on the side of the pixel driving circuit away from the base substrate, the method further includes: preparing a third organic layer on a side of the pixel driving circuit away from the base substrate; preparing a third metal wiring on a side of the third organic layer away from the pixel driving circuit; The step of preparing a first organic layer on a side of the pixel driving circuit away from the base substrate comprises: preparing a first organic material layer on a side of the third metal trace away from the third organic layer; preparing a first via hole on the first organic material layer to form the first organic layer, wherein the first via hole is used to connect the first metal trace and the third metal trace; The second organic layer is formed on a side of the first metal wiring away from the pixel driving circuit, comprising: preparing a first sub-organic layer on a side of the first metal wiring away from the third organic layer; A second sub-organic layer is prepared on a side of the first sub-organic layer away from the third organic layer to form the second organic layer, wherein the second sub-organic layer is located in the area where the first via hole is located.

17. The preparation method according to claim 16, characterized in that The method comprises: preparing a first organic layer on a side of the pixel driving circuit away from the base substrate, comprising: preparing a first organic material layer on a side of the pixel driving circuit away from the base substrate; At least in the area where the anode is located, a first groove corresponding to the first metal wiring is prepared on the first organic material layer to form the first organic layer.

18. The preparation method according to claim 17, characterized in that: Producing a first groove corresponding to the first metal trace on the first organic material layer, comprising: The first organic material layer is exposed using a first multi-tone mask, wherein the first multi-tone mask includes a first light shielding portion and a first exposure portion corresponding to the first groove, and the light transmittance of the first exposure portion is greater than the light transmittance of the first light shielding portion.

19. The preparation method according to claim 16, characterized in that A second organic layer is formed on a side of the first metal wiring away from the pixel driving circuit, comprising: forming a second organic material layer on a side of the first metal wiring away from the pixel driving circuit; At least in the area where the anode is located, the second organic material layer in the first wiring area is thinned to form the second organic layer.

20. The preparation method according to claim 19, characterized in that Thinning the second organic material layer in the first wiring area includes: The second organic material layer is exposed using a second multi-tone mask, wherein the second multi-tone mask includes a second light shielding portion and a second exposure portion corresponding to the first wiring area, and the light transmittance of the second exposure portion is greater than the light transmittance of the second light shielding portion.

21. The preparation method according to claim 16, characterized in that A second organic layer is formed on a side of the first metal wiring away from the pixel driving circuit, comprising: preparing a second organic material layer on a side of the first metal trace away from the third organic layer; At least in the area where the anode is located, the second organic material layer outside the area where the first via hole is located is thinned to form the second organic layer.

22. The preparation method according to claim 21, characterized in that Thinning the second organic material layer outside the area where the first via hole is located, comprising: The second organic material layer is exposed using a third multi-tone mask, wherein the third multi-tone mask includes a third exposure portion and a third light shielding portion corresponding to the area where the first via hole is located, and the light transmittance of the third exposure portion is greater than the light transmittance of the third light shielding portion.

Images