Display panel and display device

Abstract

The present invention provides a display panel and a display device, comprising: a light emitting device layer; and an auxiliary structure, the light emitting device layer comprising: a first conductive layer, an organic layer, and a second conductive layer, the first conductive layer comprising: a first electrode electrically connected to a pixel driving circuit; the second conductive layer comprising: a second electrode located on a first portion of the organic layer; the auxiliary structure comprising: a base, an auxiliary electrode, and an auxiliary portion arranged in sequence, the cross section of the base being trapezoidal, the second electrode extending beyond the first portion, and connected to the auxiliary electrode.

Description

[Technical field]

[0001] The present invention relates to the technical field of displays, and in particular to display panels and display devices. [Background technology]

[0002] When a large OLED (Organic Light-Emitting Diode) display panel is in operation, the voltage on the cathode in each area of ​​the panel surface is not consistent due to the high resistance of the cathode, which causes uneven brightness on the display screen. The conventional solution is to additionally fabricate an auxiliary electrode on the back plate and make the cathode contact the auxiliary electrode in various ways, and by connecting it in parallel with the auxiliary electrode, the resistance of the cathode can be reduced and the screen display of the entire panel can be made uniform.

[0003] In the prior art, the cathode is generally abutted on the auxiliary electrode by an undercut method, but such abutment has problems in that the abutment is unstable and difficult to achieve. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present invention provide a display panel and a display device, which can improve the problem of unstable contact between the cathode and the auxiliary electrode. [Means for solving the problem]

[0005] An embodiment of the present invention provides a display panel, comprising: an array substrate; a light emitting device layer; and an auxiliary structure, the array substrate comprising: a substrate; and a pixel driving circuit layer disposed on the substrate, the pixel driving circuit layer comprising a pixel driving circuit; the light emitting device layer disposed on the pixel driving circuit layer, comprising: a first conductive layer; an organic layer disposed on the first conductive layer; and a second conductive layer disposed on the organic layer, the first conductive layer comprising a first electrode electrically connected to the pixel driving circuit, the organic layer comprising a first portion, the second conductive layer comprising a second electrode disposed on the first portion, a portion of the first portion being electrically connected between the first electrode and the second electrode; the auxiliary structure disposed on the pixel driving circuit layer, comprising: a base; an auxiliary electrode disposed on an outer surface of the base; and an auxiliary portion disposed on the base, the cross section of the base being trapezoidal, an edge of the second electrode close to the auxiliary portion exceeds an edge of the first portion close to the auxiliary portion and is connected to the auxiliary electrode; an edge of the second electrode close to the auxiliary structure extends beyond an edge of the first portion close to the auxiliary structure and is connected to the auxiliary electrode; The base further includes a top surface, the top surface is connected to the outer surface and is disposed opposite to the bottom surface, and the auxiliary electrode covers the top surface and the outer surface.

[0006] In some embodiments, the organic layer further includes a second portion located on the auxiliary portion, the first portion and the second portion being cut at an edge portion of the auxiliary portion, the second conductive layer further includes a cut portion located on the second portion, and the second electrode and the cut portion are cut at the edge portion of the auxiliary portion.

[0007] In some embodiments, an overlapping area between the second electrode and the auxiliary electrode is greater than an overlapping area between the first portion and the auxiliary electrode.

[0008] In some embodiments, the auxiliary electrode and the first electrodes are disposed in the same layer and are made of the same material.

[0009] In some embodiments, the array substrate further includes a planar layer, the planar layer being located between the pixel driving circuit layer and the first conductive layer, the light emitting device layer further includes a pixel defining layer, the pixel defining layer being located between the planar layer and the organic layer, and the base and the planar layer or the pixel defining layer are disposed in the same layer and are made of the same material.

[0010] In some embodiments, the orthogonal projection of an edge of the auxiliary part on the substrate exceeds the boundary of the orthogonal projection of the base on the substrate.

[0011] In some embodiments, the orthogonal projection of the edge of the auxiliary part on the substrate exceeds a boundary of the orthogonal projection of the base on the substrate by more than 0.5 μm, and the orthogonal projection of the edge of the second electrode close to the auxiliary structure on the substrate is located within the boundary range of the orthogonal projection of the auxiliary part on the substrate.

[0012] In some embodiments, the angle between the outer surface of the base and the bottom surface of the substrate is greater than or equal to 30° and less than or equal to 60°.

[0013] An embodiment of the present invention further provides a display panel, comprising: an array substrate, a light emitting device layer, and an auxiliary structure, the array substrate comprising: a substrate; and a pixel driving circuit layer disposed on the substrate, the pixel driving circuit layer comprising a pixel driving circuit, the light emitting device layer disposed on the pixel driving circuit layer, the light emitting device layer comprising: a first conductive layer, an organic layer disposed on the first conductive layer, and a second conductive layer disposed on the organic layer, the first conductive layer comprising a first electrode electrically connected to the pixel driving circuit, the organic layer comprising a first portion, the second conductive layer comprising a second electrode disposed on the first portion, a portion of the first portion being electrically connected between the first electrode and the second electrode, the auxiliary structure disposed on the pixel driving circuit layer, the auxiliary structure comprising: a base, an auxiliary electrode disposed on an outer surface of the base, and an auxiliary portion disposed on the base, a cross section of the base is trapezoidal, an edge of the second electrode close to the auxiliary portion exceeds an edge of the first portion close to the auxiliary portion and is connected to the auxiliary electrode.

[0014] In some embodiments, an edge of the second electrode close to the auxiliary structure extends beyond an edge of the first portion close to the auxiliary structure and is connected to the auxiliary electrode.

[0015] In some embodiments, the organic layer further includes a second portion located on the auxiliary portion, the first portion and the second portion being cut at an edge portion of the auxiliary portion, the second conductive layer further includes a cut portion located on the second portion, and the second electrode and the cut portion are cut at the edge portion of the auxiliary portion.

[0016] In some embodiments, an overlapping area between the second electrode and the auxiliary electrode is greater than an overlapping area between the first portion and the auxiliary electrode.

[0017] In some embodiments, the auxiliary electrode and the first electrodes are disposed in the same layer and are made of the same material.

[0018] In some embodiments, the base further includes a top surface, the top surface connected to the outer surface and positioned opposite the substrate, and the auxiliary electrode covering the top surface and the outer surface.

[0019] In some embodiments, the array substrate further includes a planar layer, the planar layer being located between the pixel driving circuit layer and the first conductive layer, the light emitting device layer further includes a pixel defining layer, the pixel defining layer being located between the planar layer and the organic layer, and the base and the planar layer or the pixel defining layer are disposed in the same layer and are made of the same material.

[0020] In some embodiments, the orthogonal projection of an edge of the auxiliary part on the substrate exceeds the boundary of the orthogonal projection of the base on the substrate.

[0021] In some embodiments, the orthogonal projection of the edge of the auxiliary part on the substrate exceeds a boundary of the orthogonal projection of the base on the substrate by more than 0.5 μm, and the orthogonal projection of the edge of the second electrode close to the auxiliary structure on the substrate is located within the boundary range of the orthogonal projection of the auxiliary part on the substrate.

[0022] In some embodiments, the cross-sectional shape of the auxiliary portion is an inverted trapezoid or a rectangle.

[0023] In some embodiments, the angle between the outer surface of the base and the bottom surface of the substrate is greater than or equal to 30° and less than or equal to 60°.

[0024] An embodiment of the present invention further provides a display device, comprising the display panel according to any one of the preceding claims. Effect of the Invention

[0025] [Beneficial effects] In the display panel and display device provided by the embodiments of the present invention, the cross section of the base is trapezoidal, which can improve the contact probability between the second electrode and the auxiliary electrode. The second electrode extends beyond the edge of the first part close to the auxiliary part and is connected to the auxiliary electrode, which can reduce the resistance of the second electrode and improve the phenomenon of uneven display on a large panel caused by a voltage drop due to a cathode impedance.

[0026] In order to more clearly describe the technical means in the embodiments of the present invention, the following briefly introduces the drawings that need to be used in the description of the embodiments. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings under the premise that no creative labor is required. [Brief description of the drawings]

[0027] [Figure 1] FIG. 2 is a top view schematic diagram of a display panel provided by an embodiment of the present invention. [Diagram 2]FIG. 2 is a schematic cross-sectional view of the display panel in FIG. [Diagram 3] FIG. 2 is an enlarged schematic view of part A in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, the technical means in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art under the premise that no creative labor is required, all belong to the protection scope of the present invention. It should also be understood that the specific embodiments described herein are only used to explain and interpret the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the direction words used, such as "up" and "down", usually refer to the up and down under the actual use or operating state of the device, specifically the drawing direction in the drawing, and "inside" and "outside" are relative to the contour of the device.

[0029] 1 to 3, an embodiment of the present invention provides a display panel 1000. Exemplarily, the display panel 1000 is an organic light-emitting diode (OLED) display panel.

[0030] As shown in FIG. 1, the display panel 1000 includes a display area DA and a non-display area NDA. The display area DA may be an area used to install sub-pixels that display images. The non-display area NDA may be an area used to install a driving unit, such as a gate driving circuit, that provides driving signals to pixel driving circuits of the sub-pixels, and some wiring that provides signals to the driving unit. In the non-display area NDA, sub-pixels that are generally used for display are not installed. The non-display area NDA may be installed on at least one side of the display area DA and at least partially surround the periphery of the display area DA.

[0031] As shown in FIG. 3, the display panel 1000 includes an array substrate 1 , a light emitting device layer 3 and a support structure 5 .

[0032] The array substrate 1 includes a substrate 10 , a light-shielding layer 11 , a buffer layer 12 , a pixel driving circuit layer 13 and a planar layer 18 .

[0033] The substrate 10 is used to carry the film layers disposed thereon. The substrate 10 may include a single layer insulating material, such as glass, quartz and polymer resin, or a multi-layer insulating material, such as two layers of polymer resin. The substrate 10 may be a rigid substrate or a flexible substrate.

[0034] The light-shielding layer 11 is disposed on the substrate 10 and is used to shield the semiconductor pattern of a thin film transistor from light. The light-shielding layer 11 may include one or more metals selected from the group consisting of molybdenum (Mo), aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), titanium (Ti), tantalum (Ta), tungsten (W), and copper (Cu). The light-shielding layer 11 may be a single layer film or a multi-layer film.

[0035] The buffer layer 12 may be disposed on the light-shielding layer 11. The buffer layer 12 may include a single layer of insulating films such as silicon nitride (SiNx) and silicon oxide (SiOx), or a multilayer film in which silicon nitride (SiNx) and silicon oxide (SiOx) are stacked. The buffer layer 12 prevents the penetration of unnecessary components such as impurities or moisture.

[0036] The pixel driving circuit layer 13 is disposed on the substrate 10 and includes a plurality of pixel driving circuits disposed in the display area DA. Exemplarily, the pixel driving circuit layer 13 includes an active layer 131, a first insulating layer 132 disposed on the active layer 131, a first metal layer 133 disposed on the first insulating layer 132, an interlayer insulating layer 134 disposed on the first metal layer 133, a second metal layer 135 disposed on the interlayer insulating layer 134, and a passivation layer 136 disposed on the second metal layer 135. Here, the active layer 131 includes a plurality of semiconductor patterns, the first metal layer 133 includes a plurality of gates, and the second metal layer 135 includes a plurality of sources and a plurality of drains. The plurality of semiconductor patterns, the plurality of gates, the plurality of sources, and the plurality of drains may jointly form a plurality of thin film transistors 139. Here, the plurality of pixel driving circuits may include a plurality of the thin film transistors 139.

[0037] The planarization layer 18 is located on the passivation layer 136. The planarization layer 18 is usually thick and serves to provide a planar surface for the deposition of the anode. The planarization layer 18 may include an inorganic insulating material or an organic insulating material such as polyacrylates resin, epoxy resin, phenolic resin, polyamides resin, polyimides resin, unsaturated polyesters resin, polyphenylene ethers resin, polyphenylenesulfides resin, or benzocyclobutene (BCB). The planarization layer 18 may further include, but is not limited to, a photosensitive material.

[0038] The light emitting device layer 3 is located on the pixel driving circuit layer 13 and includes a first conductive layer 31, a pixel definition layer 32, an organic layer 33, and a second conductive layer 34. At least a part of the light emitting device layer 3 is located within the display area DA.

[0039] The first conductive layer 31 includes a plurality of first electrodes 311 (i.e., anodes) electrically connected to the pixel driving circuits. The anodes may have a laminated film structure in which a material layer having a relatively high work function, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In2O3), and a reflective material layer, such as, but not limited to, silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), or a mixture thereof, are laminated.

[0040] The pixel definition layer 32 is located on the first conductive layer 31, and is provided with a plurality of openings 320 used to expose the first electrodes 311. The pixel definition layer 32 may include a resin such as polyacrylates or polyimides, a silica-based inorganic material, etc., and may absorb external light by a material including at least one of a black pigment and a dye, thereby reducing the reflectance of the external light and enhancing the contrast of the display device.

[0041] The organic layer 33 is located on the first conductive layer 31 and includes a first portion 331 and a plurality of second portions 332. Here, a part of the first portion 331 is located within the corresponding opening 320 of the pixel definition layer 32. Exemplarily, the first portion 331 is an integral structure (due to viewing angle issues, the portions represented by the two reference numerals 331 in FIG. 2 are actually connected to each other), the first portion 332 is provided with a plurality of openings, and the plurality of second portions 332 are cut from the first portion 331 at the locations of the plurality of openings. The organic layer 33 may include an organic light-emitting layer and a common layer, and may be fabricated by an ink-jet printing (IJP) method, for example. The organic light-emitting layer may include an organic material layer, and the common layer may include at least one of a first common layer and a second common layer, the first common layer including a hole injection layer and a hole transport layer, and the second common layer including an electron injection layer and an electron transport layer.

[0042] The second conductive layer 34 is located on the organic layer 33 and includes a second electrode 341 (i.e., a cathode) and a plurality of cut portions 342. Exemplarily, the second electrode 341 is an integral structure (due to viewing angle issues, the portions represented by the two reference numerals 341 in FIG. 2 are actually connected to each other), a plurality of openings are provided in the second electrode 341, and the plurality of cut portions 342 are cut from the second electrode 341 at the locations of the plurality of openings. Here, each of the cut portions 342 is located on the corresponding second portion 332 of the organic layer 33, the second electrode 341 is located on the first portion 331 of the organic layer 33, and a part of the first portion 331 is disposed between the first electrode 311 and the second electrode 341. Exemplarily, the second electrode 341 may be formed by deposition or sputtering, and includes a material layer having a relatively small work function, such as Li, Ca, an alloy of LiF and Ca, an alloy of LiF and Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF2, Ba, or a compound or mixture thereof (e.g., a mixture of Ag and Mg). The second electrode 341 may further include a transparent metal oxide layer disposed on the material layer having a relatively small work function.

[0043] A plurality of the auxiliary structures 5 are located on the pixel driving circuit layer 13 and on the sides of the second electrode 341. At least one of the auxiliary structures 5 includes a base 50, an auxiliary electrode 51 and an auxiliary part 52, and is located in the display area DA.

[0044] The base 50 is located on the pixel driving circuit layer 13, and its cross section is approximately trapezoidal. The base 50 includes an outer surface, a bottom surface, and an upper surface, the bottom surface being close to the pixel driving circuit layer 13, the upper surface being connected to the outer surface and facing the bottom surface, and the length of the upper surface is smaller than that of the bottom surface. An included angle α (i.e., a taper angle) between the outer surface and a horizontal plane on which the bottom surface is located is an acute angle. Exemplarily, the included angle α is greater than or equal to 30° and less than or equal to 60°, so that the second electrode 341 can be more easily attached to the outer surface of the base 50. The base 50 may be manufactured in the same layer as the flat layer 18 or the pixel definition layer 32, and by having the base 50 be disposed in the same layer as the flat layer 18 or the pixel definition layer 32 and made of the same material, manufacturing costs can be saved.

[0045] The auxiliary electrode 51 is located on the outer surface of the base 50 and is connected to an edge of the second electrode 341 close to the auxiliary structure 5. As can be understood, the auxiliary electrode 51 is connected to the second electrode 341, and since the auxiliary electrode 51 and the second electrode 341 have a relatively large contact area, the auxiliary electrode 51 can be regarded as being connected in parallel with the second electrode 341, thereby reducing the resistance of the second electrode 341. Exemplarily, the auxiliary electrode 51 covers the upper surface and the outer surface of the base 50, and can ensure the contact area between the auxiliary electrode 51 and the second electrode 341. The auxiliary electrode 51 may be fabricated simultaneously with the first electrode 311, so that the auxiliary electrode 51 is disposed in the same layer and made of the same material as the first electrode 311, thus saving fabrication costs.

[0046] The auxiliary part 52 is located on the auxiliary electrode 51, and may have a cross section of a substantially inverted trapezoid or rectangle. An edge of the auxiliary part 52 is greater than a first distance D1 relative to an edge of the base 50, so that the organic layer 33 can be more easily cut at the edge of the auxiliary part 52, and the second part 332 of the organic layer 33 can be located on the auxiliary part 52. Exemplarily, the material of the auxiliary part 52 may include an organic material or an inorganic material, and the first distance D1 is greater than 0.5 μm. Here, the orthogonal projection of the edge of the second electrode 341 close to the auxiliary structure 5 on the substrate 10 is located within a boundary range of the orthogonal projection of the auxiliary part 52 on the substrate 10.

[0047] In this embodiment, the first portion 331 of the organic layer 33 and the corresponding second portion 332 are cut at the edge of the corresponding auxiliary portion 52, and the second electrode 341 of the second conductive layer 34 and the corresponding cut portion 342 are cut at the edge of the corresponding auxiliary portion 52. Thus, the organic layer 33 and the second conductive layer 34 can be blocked by a plurality of the auxiliary structures 5. The base 50 is fabricated at a location where the second electrode 341 (i.e., the cathode) and the auxiliary electrode need to abut, and the auxiliary electrode 51 formed by metal coating is coated on the upper side of the base 50. At the same time, the inclination angle of the base 50 is an acute angle, which can improve the probability of abutment between the second electrode 341 and the auxiliary electrode 51. The edge of the second electrode 341 close to the auxiliary portion 52 is connected in parallel with the auxiliary electrode 51 beyond the edge of the first portion 331 close to the auxiliary portion 52. By connecting the auxiliary electrode 51 and the second electrode 341 in parallel, the resistance of the second electrode 341 can be reduced, and the phenomenon of uneven screen display on a large panel caused by voltage drop due to cathode impedance can be improved.

[0048] 2, in actual manufacturing, a part of the first portion 331 of the organic layer 33 may contact the auxiliary electrode 51, and in order to ensure the connection between the second electrode 341 and the auxiliary electrode 51, the deposition angle can be controlled to allow the second electrode 341 to contact the auxiliary electrode 51 with an area larger than that of the first portion 331 below. That is, the overlapping area between the second electrode 341 and the auxiliary electrode 51 on the base 50 is larger than the overlapping area between the first portion 331 and the auxiliary electrode 51 on the base 50, and the second electrode 341 and the auxiliary electrode 51 have a stable electrical connection, which further reduces the resistance of the second electrode 341 and improves the uniformity of the screen display.

[0049] In another embodiment, the heights of the auxiliary structures 5 are uniform and are evenly distributed in the display area DA, so that the contact between the second electrode 341 and the auxiliary electrodes 51 is more uniform and the resistance of the cathodes in the panel plane is uniform.

[0050] In a possible embodiment, by controlling the deposition process of the second electrode 341, the second electrode 341 does not need to be cut into multiple cut portions 342, and the second electrode 341 can be a complete electrode, which can further improve the uniformity of the cathode resistance within the panel surface.

[0051] In a possible embodiment, the display panel further includes an encapsulation layer located on the light emitting device layer 3 and the auxiliary structure 5, the encapsulation layer including a first inorganic encapsulation layer, a first organic encapsulation layer and a second inorganic encapsulation layer stacked together. A portion of the encapsulation layer located on the auxiliary structure 5 extends along the contour of the auxiliary structure 5. Exemplarily, a portion of the first inorganic layer and a portion of the second inorganic layer extend along the contour of the auxiliary structure 5, and the organic layer 33 may be disposed continuously or cut at an edge of the auxiliary portion 52 of the auxiliary structure 5. This can enhance the encapsulation effect on the sub-pixels in the display area DA.

[0052] Furthermore, if necessary, at least one auxiliary structure 5 may be provided in the non-display area NDA, and the auxiliary structure 5 may be multiplexed as a barrier structure, where the first inorganic layer and the second inorganic layer are located on the auxiliary structure 5 multiplexed as a barrier structure, and the organic layer 33 is located on one side of the auxiliary structure 5 multiplexed as a barrier structure, close to the center of the display panel.

[0053] Further, the display panel further includes a first barrier located on the pixel driving circuit layer 13, and the first barrier is located on one side of the auxiliary structure 5, which is multiplexed as a barrier structure, away from the center of the display panel. The first inorganic layer and the second inorganic layer are further located on the first barrier, and the organic layer 33 is located on one side of the first barrier, which is closer to the center of the display panel. The top of the first barrier is higher than the top of the auxiliary structure 5. In this embodiment, the first barrier may be a main barrier having a relatively large height, and the auxiliary structure 5 located in the non-display area NDA of the display panel is multiplexed as an auxiliary barrier having a relatively small height, so as to further ensure the sealing performance.

[0054] An embodiment of the present invention further provides a display device, which includes the above-described display panel 1000. The display device is a device having a display function, and exemplarily, the display device may be a device for displaying videos or still images, and may include fixed terminals such as televisions, desktop computers, monitors, or signboards, and may include mobile terminals such as mobile phones, tablet computers, mobile communication terminals, electronic organizers, e-books, multimedia players, navigators, or notebook computers, and may further include wearable electronic devices such as smart watches, smart glasses, virtual reality devices, or augmented reality devices.

[0055] Above, the embodiments of the present invention are introduced in detail, and the principles and embodiments of the present invention are described in detail by applying specific examples in this specification. The above description of the embodiments is only used to help understand the method of the present invention and its core idea. At the same time, those skilled in the art can make any changes in the specific embodiments and application scope according to the idea of ​​the present invention. As above, it should be understood that the contents of this specification are not limitations on the present invention. [Explanation of symbols]

[0056] 1 Array Board 3 Light-emitting device layer 5 Auxiliary structure 10 Substrate 11 Light blocking layer 12 Buffer layer 13 Pixel driving circuit layer 18 flat layer 31 First conductive layer 32 Pixel Definition Layer 33 Organic layer 34 Second conductive layer 50 Base 51 Auxiliary electrode 52 Auxiliary part 131 Active layer 132 First insulating layer 133 1st metal layer 134 Interlayer insulation layer 135 Second metal layer 136 Passivation Layer 139 Thin-film transistor 311 1st electrode 320 Opening 331 Part 1 331 sign 332 Part 2 332 Part 1 341 2nd electrode 341 sign 342 Cutting part 1000 Display Panel

Claims

1. A display panel, an array substrate, a light emitting device layer, and a support structure; The array substrate includes a substrate and a pixel driving circuit layer located on the substrate, the pixel driving circuit layer including a pixel driving circuit; the light emitting device layer is located on the pixel driving circuit layer and includes a first conductive layer, an organic layer located on the first conductive layer, and a second conductive layer located on the organic layer, the first conductive layer includes a first electrode electrically connected to the pixel driving circuit, the organic layer includes a first portion, the second conductive layer includes a second electrode located on the first portion, and a portion of the first portion is located between the first electrode and the second electrode; The auxiliary structure is located on the pixel driving circuit layer and includes a base, an auxiliary electrode located on an outer surface of the base, and an auxiliary part located on the base; a cross section of the base is trapezoidal, and an edge of the second electrode close to the auxiliary portion exceeds an edge of the first portion close to the auxiliary portion and is connected to the auxiliary electrode; an edge of the second electrode close to the auxiliary structure extends beyond an edge of the first portion close to the auxiliary structure and is connected to the auxiliary electrode; the base further includes an upper surface and a bottom surface, the bottom surface is close to the pixel driving circuit layer, the upper surface is connected to the outer surface and is disposed opposite to the bottom surface, a length of the upper surface is smaller than a length of the bottom surface, and the auxiliary electrode covers the upper surface and the outer surface.

2. 2. The display panel of claim 1, wherein the organic layer further includes a second portion located on the auxiliary portion, the first portion and the second portion being cut at an edge portion of the auxiliary portion, the second conductive layer further includes a cut portion located on the second portion, and the second electrode and the cut portion are cut at the edge portion of the auxiliary portion.

3. The display panel according to claim 1 , wherein an overlapping area between the second electrode and the auxiliary electrode is larger than an overlapping area between the first portion and the auxiliary electrode.

4. The display panel according to claim 1 , wherein the auxiliary electrode and the first electrodes are disposed in the same layer and made of the same material.

5. 2. The display panel of claim 1, wherein the array substrate further includes a planar layer, the planar layer being located between the pixel driving circuit layer and the first conductive layer, the light emitting device layer further includes a pixel defining layer, the pixel defining layer being located between the planar layer and the organic layer, and the base and the planar layer or the pixel defining layer are disposed in the same layer and made of the same material.

6. The display panel according to claim 1 , wherein an orthogonal projection of an edge of the auxiliary portion on the substrate exceeds a boundary of an orthogonal projection of the base on the substrate.

7. 7. The display panel of claim 6, wherein the orthogonal projection of the edge of the auxiliary portion on the substrate exceeds a boundary of the orthogonal projection of the base on the substrate by 0.5 μm or more, and the orthogonal projection of the edge of the second electrode close to the auxiliary structure on the substrate is located within the boundary range of the orthogonal projection of the auxiliary portion on the substrate.

8. The display panel according to claim 1 , wherein an included angle between the outer surface of the base and a bottom surface of the substrate is in the range of 30° to 60°.

9. A display panel, an array substrate, a light emitting device layer, and a support structure; The array substrate includes a substrate and a pixel driving circuit layer located on the substrate, the pixel driving circuit layer including a pixel driving circuit; the light emitting device layer is located on the pixel driving circuit layer and includes a first conductive layer, an organic layer located on the first conductive layer, and a second conductive layer located on the organic layer, the first conductive layer includes a first electrode electrically connected to the pixel driving circuit, the organic layer includes a first portion, the second conductive layer includes a second electrode located on the first portion, and a portion of the first portion is located between the first electrode and the second electrode; The auxiliary structure is located on the pixel driving circuit layer and includes a base, an auxiliary electrode located on an outer surface of the base, and an auxiliary part located on the base; a cross section of the base is trapezoidal, and an edge of the second electrode close to the auxiliary portion exceeds an edge of the first portion close to the auxiliary portion and is connected to the auxiliary electrode; The base further includes an upper surface and a bottom surface, the bottom surface is close to the pixel driving circuit layer, the upper surface is connected to the outer surface and is disposed opposite to the bottom surface, and the length of the upper surface is smaller than the length of the bottom surface.

10. The display panel of claim 9 , wherein an edge of the second electrode close to the auxiliary structure extends beyond an edge of the first portion close to the auxiliary structure and is connected to the auxiliary electrode.

11. 11. The display panel of claim 10, wherein the organic layer further includes a second portion located on the auxiliary portion, the first portion and the second portion being cut at an edge portion of the auxiliary portion, the second conductive layer further includes a cut portion located on the second portion, and the second electrode and the cut portion are cut at the edge portion of the auxiliary portion.

12. The display panel of claim 10 , wherein an overlapping area between the second electrode and the auxiliary electrode is larger than an overlapping area between the first portion and the auxiliary electrode.

13. The display panel according to claim 9 , wherein the auxiliary electrode and the first electrodes are disposed in the same layer and made of the same material.

14. The display panel of claim 9, wherein the auxiliary electrode covers the upper surface and the outer surface.

15. 10. The display panel of claim 9, wherein the array substrate further includes a planar layer, the planar layer being located between the pixel driving circuit layer and the first conductive layer, the light emitting device layer further includes a pixel defining layer, the pixel defining layer being located between the planar layer and the organic layer, and the base and the planar layer or the pixel defining layer are disposed in the same layer and made of the same material.

16. The display panel according to claim 10 , wherein an orthogonal projection of an edge of the auxiliary portion on the substrate exceeds a boundary of an orthogonal projection of the base on the substrate.

17. 17. The display panel of claim 16, wherein the orthogonal projection of the edge of the auxiliary portion on the substrate exceeds a boundary of the orthogonal projection of the base on the substrate by 0.5 μm or more, and the orthogonal projection of the edge of the second electrode near the auxiliary structure on the substrate is located within the boundary range of the orthogonal projection of the auxiliary portion on the substrate.

18. The display panel according to claim 16 , wherein a cross-sectional shape of the auxiliary portion is an inverted trapezoid or a rectangle.

19. The display panel of claim 9 , wherein an included angle between the outer surface of the base and a bottom surface of the substrate is 30° to 60°.

20. A display device comprising the display panel according to claim 1 .

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