Display panel and display device

Abstract

The present application provides a display panel and a display device. The auxiliary electrode is arranged in the same layer as the anode and is arranged opposite to the auxiliary electrode. The conductive isolation structure includes a conductive structure arranged in contact with the cathode. The conductive structure is connected to the auxiliary electrode via a pixel definition layer. The present application arranges an auxiliary electrode arranged opposite to the conductive isolation structure so as to connect the conductive structure to the auxiliary electrode via a pixel definition layer, and realize electrical connection between the cathode, the conductive structure and the auxiliary electrode, so that the auxiliary electrode, the conductive structure and the cathode cooperate to form a whole-surface cathode; further, due to the via connection between the conductive structure and the auxiliary electrode, the surface of the conductive structure and the thickness of the conductive structure are increased while the overlap area between the cathode and the conductive structure remains unchanged, thereby reducing the resistance at the conductive structure, and then reducing the connection resistance between adjacent cathodes, thereby effectively reducing the whole-surface resistance of the cathode and improving the whole-surface uniformity of the cathode.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode), that is, organic light-emitting diode, its self-luminous principle is to use ITO transparent electrode and metal electrode as the anode (Anode) and cathode (Cathode) of the device respectively. Under a certain voltage drive, electrons and holes move from the cathode and anode respectively to the organic light-emitting layer to recombine and emit visible light.

[0003] For OLED displays, the cathode provides a common voltage, so the cathode is generally a whole-surface structure. Poor cathode uniformity will produce IR drop (voltage drop), which will be reflected in the phenomenon of regional uneven display brightness on the screen. Therefore, ensuring the uniformity of the entire cathode surface will directly affect the display effect of the OLED. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a display panel and a display device to solve the problem of poor uniformity of the entire cathode surface in OLED displays in the prior art.

[0005] In order to solve the above technical problems, the first technical solution provided by the present application is: to provide a display panel, which includes:

[0006] Driver substrate;

[0007] A sub-pixel, comprising an anode, a light-emitting layer and a cathode stacked in sequence on one side of the driving substrate;

[0008] An auxiliary electrode is disposed on the driving substrate and is disposed in the same layer as the anode;

[0009] A pixel definition layer, disposed on one side of the driving substrate and covering the auxiliary electrode and the anode;

[0010] A conductive isolation structure is arranged opposite to the auxiliary electrode and is located on a side of the pixel definition layer away from the drive substrate and protrudes from the drive substrate to form a pixel accommodation area for accommodating the sub-pixel; the conductive isolation structure includes a main body structure and a top structure located on the upper surface of the main body and shielding and partially extending from the main body structure; the main body structure includes a conductive structure and an intermediate insulating structure located between the top structure and the conductive structure, and the conductive structure is arranged in contact with the cathode;

[0011] The conductive structure is connected to the auxiliary electrode via through the pixel definition layer, so that the cathode is electrically connected to the auxiliary electrode through the conductive structure; the orthographic projection of the conductive structure on the driving substrate covers the orthographic projection of the auxiliary electrode on the driving substrate.

[0012] The surface of the pixel definition layer away from the driving substrate has a first via and a second via arranged at intervals, the orthographic projection of the first via on the auxiliary electrode is located inside the auxiliary electrode so that the auxiliary electrode is partially exposed to the pixel definition layer; the orthographic projection of the second via on the cathode is located inside the anode so that the anode is partially exposed to the pixel definition layer; the conductive structure is electrically connected to the auxiliary electrode through the first via; the spacing between adjacent first vias and second vias is greater than 5 microns.

[0013] Wherein, the distance between the edge of the first via hole and the edge of the corresponding auxiliary electrode is 2 to 3 micrometers.

[0014] The auxiliary electrode and the anode are formed by patterning the same conductive layer; a plurality of the auxiliary electrodes are interconnected to form a mesh electrode, and the auxiliary electrodes are located on the sides of the anode.

[0015] Wherein, the distance between adjacent anodes and auxiliary electrodes is 3-4 microns.

[0016] Wherein, the conductive structure includes at least one of a metal oxide and a transition metal oxide.

[0017] Wherein, in a direction perpendicular to the driving substrate, the thickness of the intermediate insulating structure is greater than or equal to the thickness of the conductive structure.

[0018] Wherein, the top structure and the middle insulating structure are both made of transparent insulating materials.

[0019] The display panel further includes an encapsulation layer, which covers the sub-pixels, and covers the side walls of the conductive isolation structure and a portion of the upper surface of the conductive isolation structure.

[0020] In order to solve the above technical problem, the second technical solution provided in the present application is: to provide a display device, wherein the display device includes the above display panel.

[0021] Beneficial effects of the present application: Different from the prior art, the present application provides a display panel and a display device, wherein the display panel includes a driving substrate, a sub-pixel, an auxiliary electrode, a pixel definition layer and a conductive isolation structure. The sub-pixel includes an anode, a light-emitting layer and a cathode which are sequentially stacked and arranged on one side of the driving substrate. The auxiliary electrode is arranged on the driving substrate and arranged in the same layer as the anode. The pixel definition layer is arranged on one side of the driving substrate and covers the auxiliary electrode and the anode. The conductive isolation structure is arranged opposite to the auxiliary electrode and is located on the side of the pixel definition layer away from the driving substrate, and protrudes from the driving substrate to form a pixel accommodation area for accommodating the sub-pixel. The conductive isolation structure includes a main body structure and a top structure located on the upper surface of the main body and shielding and partially extending out of the main body structure; the main body structure includes a conductive structure and an intermediate insulating structure located between the top structure and the conductive structure, and the conductive structure is arranged in contact with the cathode. Among them, the conductive structure is connected to the auxiliary electrode via hole through the pixel definition layer, so that the cathode is electrically connected to the auxiliary electrode through the conductive structure. The positive projection of the conductive structure on the driving substrate covers the positive projection of the auxiliary electrode on the driving substrate. The present application sets an auxiliary electrode that is arranged opposite to the conductive isolation structure, so as to facilitate the conductive structure to be connected to the auxiliary electrode via hole through the pixel definition layer, and realize the electrical connection between the cathode, the conductive structure and the auxiliary electrode, so that the auxiliary electrode, the conductive structure and the cathode cooperate to form a whole-surface cathode; further, due to the via hole connection between the conductive structure and the auxiliary electrode, the surface of the conductive structure and the thickness of the conductive structure are increased under the condition that the overlap area of ​​the cathode and the conductive structure remains unchanged, thereby reducing the resistance at the conductive structure, and then reducing the connection resistance between adjacent cathodes, thereby effectively reducing the whole-surface resistance of the cathode and improving the whole-surface uniformity of the cathode. Secondly, an intermediate insulating structure is set between the top structure and the conductive structure, and the thickness of the conductive structure can be reduced while ensuring the thickness of the conductive isolation structure, which not only facilitates the overlap of the cathode and the conductive structure, but also reduces the shading effect of the conductive structure on the sub-pixel. At the same time, an auxiliary electrode is set directly below the conductive structure, and the electrical structure is connected to the auxiliary electrode via hole, so as to compensate for the thickness of the thinned conductive structure to balance the resistance of the conductive structure, thereby reducing the connection resistance between the cathodes of adjacent sub-pixels, which is beneficial to the whole-surface uniformity of the cathode. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 is a schematic structural diagram of an embodiment of a display panel provided by the present application;

[0024] Figure 2 is a schematic diagram of a top view of an embodiment of an anode and an auxiliary electrode provided by the present application;

[0025] Figure 3 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0026] Description of Figure Numbers:

[0027] Driving substrate 10, sub-pixel 20, anode 21, light-emitting layer 22, cathode 23, auxiliary electrode 30, pixel definition layer 40, first via 41, second via 42, conductive isolation structure 50, main structure 51, conductive structure 511, intermediate insulating structure 512, top structure 52, pixel accommodating area 53, encapsulation layer 60, organic encapsulation layer 70, spacing d1 / d2 / d3. DETAILED DESCRIPTION

[0028] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0029] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the prior art, in order to achieve high resolution and colorization of OLEDs and better solve the problems of low cathode template resolution and low device yield, a conductive isolation structure was introduced in actual research. That is, a metal mask is not used in device preparation. Instead, an insulating partition is made on the substrate before evaporating the organic film and the metal cathode, thereby ultimately separating different pixels of the device and realizing a pixel array.

[0034] The conductive isolation structure includes a conductive structure overlapped with the insulating structure and the cathode. The cathode needs to be connected with the conductive structure in the conductive isolation structure to form a whole surface structure. Due to the limited overlap area between the cathode and the conductive structure, and the small spacing between pixels in the actual pixel design, the width of the conductive structure is limited. Due to the small width of the conductive structure and the large contact resistance, the uniformity of the entire surface of the cathode is poor, which will cause obvious IR Drop and uneven brightness of the display.

[0035] See also Figures 1 to 3 , Figure 1 is a schematic structural diagram of an embodiment of a display panel provided by the present application, Figure 2is a schematic diagram of a top view of an embodiment of an anode and an auxiliary electrode provided in the present application, Figure 3 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0036] Therefore, in order to solve the above-mentioned problems in the prior art, the present application provides a display panel. Figure 1 As shown, the display panel includes a driving substrate 10, a sub-pixel 20, an auxiliary electrode 30, a pixel definition layer 40 and a conductive isolation structure 50. The sub-pixel 20 includes an anode 21, a light-emitting layer 22 and a cathode 23 which are sequentially stacked and arranged on one side of the driving substrate 10. The auxiliary electrode 30 is arranged on the driving substrate 10 and is arranged in the same layer as the anode 21. The pixel definition layer 40 is arranged on one side of the driving substrate 10 and covers the auxiliary electrode 30 and the anode 21. The conductive isolation structure 50 is arranged opposite to the auxiliary electrode 30 and is located on the side of the pixel definition layer 40 away from the driving substrate 10, and protrudes from the driving substrate 10 to form a pixel accommodating area 53 for accommodating the sub-pixel 20. The conductive isolation structure 50 includes a main structure 51 and a top structure 52 located on the upper surface of the main structure 51 and shielding and partially extending out of the main structure 51. The main structure 51 includes a conductive structure 511 and an intermediate insulating structure 512 located between the top structure 52 and the conductive structure 511, and the conductive structure 511 is arranged in contact with the cathode 23. The conductive structure 511 is connected to the auxiliary electrode 30 through the pixel definition layer 40, so that the cathode 23 is electrically connected to the auxiliary electrode 30 through the conductive structure 511. The orthographic projection of the conductive structure 511 on the driving substrate 10 covers the orthographic projection of the auxiliary electrode 30 on the driving substrate 10.

[0037] The present application sets an auxiliary electrode 30 that is arranged opposite to the conductive isolation structure 50, so as to facilitate the connection of the conductive structure 511 with the auxiliary electrode 30 through the pixel definition layer 40 through the via hole, and realize the electrical connection between the cathode 23, the conductive structure 511 and the auxiliary electrode 30, so that the auxiliary electrode 30, the conductive structure 511 and the cathode 23 cooperate to form a whole-surface cathode 23; further, due to the via connection setting between the conductive structure 511 and the auxiliary electrode 30, the surface of the conductive structure 511 and the thickness of the conductive structure 511 are increased while the overlapping area between the cathode 23 and the conductive structure 511 remains unchanged, thereby reducing the resistance at the conductive structure 511, and then reducing the connection resistance between adjacent cathodes 23, thereby effectively reducing the whole-surface resistance of the cathode 23 and improving the whole-surface uniformity of the cathode 23. Secondly, the present application sets an intermediate insulating structure 512 between the top structure 52 and the conductive structure 511. Under the condition of ensuring the thickness of the conductive isolation structure 50, the thickness of the conductive structure 511 can be reduced, which not only facilitates the overlap of the cathode 23 and the conductive structure 511, but also reduces the light shielding effect of the conductive structure 511 on the sub-pixel 20. At the same time, an auxiliary electrode 30 is set directly below the conductive structure 511, and the conductive structure 511 is connected to the auxiliary electrode 30 through a via hole, so as to compensate the thickness of the thinned conductive structure 511 to balance the resistance of the conductive structure 511, thereby reducing the connection resistance between the cathodes 23 of adjacent sub-pixels 20, which is beneficial to the uniformity of the entire surface of the cathode 23.

[0038] The driving substrate 10 is used to drive the sub-pixels 20 to emit light.

[0039] There are multiple sub-pixels 20, each of which corresponds to a color pixel. The color and arrangement of the sub-pixels 20 are not limited here and can be selected according to actual needs.

[0040] It should be noted that the present application only takes two adjacent sub-pixels 20 as an example for explanation, and the sub-pixels 20 of the present application may be three or more.

[0041] The material of the auxiliary electrode 30 may be the same as or different from the material of the anode 21 . The material of the anode 21 is not limited and can be selected according to actual needs.

[0042] In this embodiment, the material of the auxiliary electrode 30 is the same as that of the anode 21. The auxiliary electrode 30 and the anode 21 are formed by patterning the same conductive layer, which can simplify the manufacturing process of the display panel. There are multiple auxiliary electrodes 30, and the multiple auxiliary electrodes 30 are interconnected to form a mesh electrode, and the auxiliary electrode 30 is located on the side of the anode 21. In other words, the multiple auxiliary electrodes 30 are arranged around the anode 21, and the auxiliary electrode 30 is at least arranged between the anodes 21. It can be understood that the anode 21 is arranged in the hollow area formed by the mesh electrode.

[0043] The distance d3 between adjacent anodes 21 and auxiliary electrodes 30 is 3-4 micrometers to prevent the anodes 21 from being in contact with the auxiliary electrodes 30 and short-circuiting the anodes 21 to affect the normal display of the display panel.

[0044] The auxiliary electrode 30 is arranged opposite to the conductive isolation structure 50, and the positive projection of the conductive structure 511 on the driving substrate 10 covers the positive projection of the auxiliary electrode 30 on the driving substrate 10, so that the auxiliary electrode 30 does not occupy the additional spacing between the sub-pixels 20, thereby not increasing the spacing between the sub-pixels 20, and further not affecting the aperture ratio of the sub-pixels 20. Secondly, the anodes 21 are independent planar electrodes, and the auxiliary electrodes 30 are arranged in the gaps between the anodes 21, so that a plurality of auxiliary electrodes 30 are connected to each other to form a mesh electrode, and by increasing the area of ​​the auxiliary electrode 30, the surface of the conductive structure 511 contacting the auxiliary electrode 30 is increased, thereby reducing the resistance of the conductive structure 511, thereby reducing the resistance of the entire cathode 23, and improving the uniformity of the cathode 23.

[0045] The pixel definition layer 40 covers the anode 21 and the auxiliary electrode 30, and fills the gap between the anode 21 and the auxiliary electrode 30, further isolating the anode 21 and the auxiliary electrode 30. The surface of the pixel definition layer 40 away from the driving substrate 10 has a first via hole 41 and a second via hole 42 arranged at intervals, and the orthographic projection of the first via hole 41 on the auxiliary electrode 30 is located in the auxiliary electrode 30 so that the auxiliary electrode 30 is partially exposed to the pixel definition layer 40. The orthographic projection of the second via hole 42 on the anode 21 is located in the anode 21 so that the anode 21 is partially exposed to the pixel definition layer 40. The conductive structure 511 is electrically connected to the auxiliary electrode 30 through the first via hole 41. Among them, the spacing d1 between adjacent first via holes 41 and second via holes 42 is greater than 5 microns.

[0046] The orthographic projection of the first via hole 41 on the auxiliary electrode 30 is located inside the auxiliary electrode 30 so that the auxiliary electrode 30 is partially exposed to the pixel definition layer 40. It can be understood that the orthographic projection area of ​​the first via hole 41 on the auxiliary electrode 30 is smaller than the area of ​​the auxiliary electrode 30, and the end of the first via hole 41 on the side close to the auxiliary electrode 30 does not exceed the edge of the auxiliary electrode 30, so as to avoid the first via hole 41 and the auxiliary electrode 30 being misaligned in the direction perpendicular to the driving substrate 10, resulting in the first via hole 41 occupying the gap between the anode 21 and the auxiliary electrode 30, thereby causing the first via hole 41 to contact the anode 21 and connect the conductive structure 511 to the anode 21 to short-circuit the anode 21. Further, the spacing d1 between adjacent first via holes 41 and second via holes 42 is greater than 5 microns to ensure the insulation effect and support strength of the pixel definition layer 40 between the first via hole 41 and the second via hole 42. Similarly, it can be understood that the orthographic projection area of ​​the second via 42 on the anode 21 is smaller than the area of ​​the anode 21, and the end of the second via 42 on the side close to the anode 21 does not exceed the edge of the anode 21, so as to avoid the second via 42 and the anode 21 being misaligned in the direction perpendicular to the drive substrate 10, causing the second via 42 to occupy the gap between the anode 21 and the auxiliary electrode 30, thereby making it impossible to have a sufficient distance between the first via 41 and the second via 42 to ensure the insulation effect and support strength of the pixel definition layer 40.

[0047] Furthermore, the spacing d2 between the edge of the first via hole 41 and the edge of the corresponding auxiliary electrode 30 is 2 to 3 microns. In other words, the spacing d2 between the edge of the first via hole 41 and the edge of the auxiliary electrode 30 that is arranged in contact with the first via hole 41 is 2 to 3 microns. The design of this spacing takes into account the deviation of the film layer produced by the process to ensure that when preparing the first via hole 41, the first via hole 41 and the auxiliary electrode 30 are not misaligned in the direction perpendicular to the drive substrate 10, resulting in a short circuit of the anode 21.

[0048] The conductive isolation structure 50 is used to isolate the sub-pixels 20. There are multiple conductive isolation structures 50. The conductive structure 511 includes at least one of a metal oxide and a transition metal oxide. Two adjacent conductive isolation structures 50 share one side of the same conductive isolation structure 50 to ensure that the spacing between the sub-pixels 20 is equal, so as not to affect the aperture ratio of the display panel.

[0049] In this embodiment, the conductive isolation structure 50 is a rectangular ring structure. The sub-pixels are arranged in a matrix, and in the row direction or column direction of the sub-pixels 20 , two adjacent conductive isolation structures 50 share one side of the same conductive isolation structure 50 .

[0050] A conductive isolation structure 50 is arranged to form a pixel accommodating area 53. A pixel accommodating area 53 accommodates at least one sub-pixel 20.

[0051] In one embodiment, when the pixel accommodating area 53 accommodates a plurality of sub-pixels 20, the colors of the plurality of sub-pixels 20 in the same pixel accommodating area 53 are equal to avoid pixel crosstalk between sub-pixels 20 of different colors. The plurality of sub-pixels 20 in the same pixel accommodating area 53 are arranged along the long side direction of the conductive isolation structure 50.

[0052] In this embodiment, the pixel accommodating area 53 accommodates one sub-pixel 20 .

[0053] The top structure 52 is located on the upper surface of the main structure 51 and blocks and extends out of the main structure 51. It can be understood that the top structure 52 is arranged in contact with the main structure 51, and the orthographic projection of the top structure 52 on the driving substrate 10 completely covers the orthographic projection of the main structure 51 on the driving substrate 10. The orthographic projection area of ​​the top structure 52 on the driving substrate 10 is larger than the orthographic projection area of ​​the main structure 51 on the driving substrate 10, that is, part of the top structure 52 extends out of the main structure 51 and is suspended. When evaporating and depositing the light-emitting layer 22 and the cathode 23, the evaporation angle can be changed by the edge of the part of the top structure 52 that is suspended so that the cathode 23 covers the organic light-emitting layer 22, which is conducive to the contact and conduction between the cathode 23 and the conductive structure 511.

[0054] In this embodiment, the side wall of the middle insulating structure 512 is inclined to the suspended portion of the top structure 52, and the inclination angle between the side wall of the middle insulating structure 512 and the lower surface of the suspended portion of the top structure 52 is less than 90 degrees. That is, in the direction perpendicular to the driving substrate 10, the longitudinal section of the side wall of the middle insulating structure 512 is a trapezoid, and the cross section of the side wall of the middle insulating structure 512 gradually decreases in the direction close to the top structure 52.

[0055] It should be understood that the intermediate insulating structure 512 can also be other structures, as long as the top structure 52 covers the main structure 51 and a portion of the top structure 52 is suspended relative to the main structure 51 .

[0056] The surface of the conductive structure 511 away from the driving substrate 10 is higher than the surface of the cathode 23 away from the driving substrate 10, so that the cathode 23 and the conductive structure 511 can overlap, thereby increasing the contact area between the cathode 23 and the side wall of the conductive structure 511 and ensuring a good connection between the cathode 23 and the conductive structure 511.

[0057] Furthermore, in this embodiment, in the direction perpendicular to the driving substrate 10, the thickness of the middle insulating structure 512 is greater than or equal to the thickness of the conductive structure 511, so as to prevent the thickness of the conductive structure 511 from being too high, which would affect the good overlap between the conductive structure 511 and the cathode 23 and block the light emitted by the sub-pixel 20. The top structure 52 and the middle insulating structure 512 are both made of transparent insulating materials, so that the light emitted by the sub-pixel 20 can pass through the top structure 52 and the middle insulating structure 512, further improving the utilization rate of the light emitted by the sub-pixel 20, which is beneficial to improving the brightness of the display panel.

[0058] When the thickness of the conductive isolation structure 50 remains unchanged, an intermediate insulating structure 512 is set in the main structure 51, which can reduce the thickness of the conductive structure 511 so that the conductive structure 511 is slightly higher than the cathode 23. This can not only ensure good overlap between the cathode 23 and the conductive structure 511, but also prevent the conductive structure 511 from excessively blocking the light emitted by the sub-pixel 20, which is beneficial to improving the utilization rate of the light emitted by the sub-pixel 20.

[0059] The materials of the middle insulating structure 512 and the top structure 52 may be the same or different, which is not limited here and is selected according to actual needs.

[0060] It should be noted that the thinning of the conductive structure 511 will increase the resistance of the conductive structure 511, thereby increasing the connection resistance between the cathodes 23 of adjacent sub-pixels 20, which is not conducive to the uniformity of the entire surface of the cathode 23. Therefore, the present application arranges the auxiliary electrode 30 directly below the conductive structure 511, and connects the conductive structure 511 to the auxiliary electrode 30 through a via hole, so as to compensate the thickness of the thinned conductive structure 511 to balance the resistance of the conductive structure 511, thereby reducing the connection resistance between the cathodes 23 of adjacent sub-pixels 20, which is conducive to the uniformity of the entire surface of the cathode 23.

[0061] The display panel further includes an encapsulation layer 60, which covers the sub-pixel 20, as well as the sidewalls of the conductive isolation structure 50 and a portion of the upper surface of the conductive isolation structure 50. The encapsulation layer 60 is used to provide anti-etching protection for the sub-pixel 20 during the process of preparing the display panel. The encapsulation layer 60 includes a non-conductive inorganic material. Specifically, the encapsulation layer 60 includes an inorganic material containing silicon, such as a SiNx-based inorganic material, where x is a non-zero natural number.

[0062] It should be understood that during the process of evaporation deposition of the cathode 23 and the light-emitting layer 22 on the upper surface of the anode 21, part of the light-emitting layer 22 and part of the cathode 23 will be stacked sequentially on the side walls of the top insulating structure 522 and sequentially on the upper surface of the top insulating structure 522.

[0063] The encapsulation layer 60 covers a portion of the upper surface of the conductive isolation structure 50 and at the same time covers the cathode 23 located on the upper surface of the top insulating structure 522 and the cathode 23 on the side wall of the top insulating structure 522, and further covers the light-emitting layer 22 located on the upper surface of the top insulating structure 522 and the light-emitting layer 22 on the side wall of the top insulating structure 522.

[0064] The display panel also includes an organic encapsulation layer 70, which covers the encapsulation layer 60 and the conductive isolation structure 50. The side of the organic encapsulation layer 70 away from the driving substrate 10 is flattened to ensure the uniformity of the coating of other encapsulation layers and meet the overall encapsulation requirements. The organic encapsulation layer 70 includes an organic acrylic material. It should be understood that the organic encapsulation layer 70 can also be other materials, which are not limited here and are selected according to actual needs.

[0065] The present application provides a display device, which includes the above-mentioned display panel.

[0066] The above are only implementation methods of the present application, and are not intended to limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: include: Driver substrate; A sub-pixel, comprising an anode, a light-emitting layer and a cathode stacked in sequence on one side of the driving substrate; An auxiliary electrode is disposed on the driving substrate and is disposed in the same layer as the anode; A pixel definition layer, disposed on one side of the driving substrate and covering the auxiliary electrode and the anode; A conductive isolation structure is arranged opposite to the auxiliary electrode and is located on a side of the pixel definition layer away from the drive substrate and protrudes from the drive substrate to form a pixel accommodation area for accommodating the sub-pixel; the conductive isolation structure includes a main body structure and a top structure located on the upper surface of the main body and shielding and partially extending from the main body structure; the main body structure includes a conductive structure and an intermediate insulating structure located between the top structure and the conductive structure, and the conductive structure is arranged in contact with the cathode; The conductive structure is connected to the auxiliary electrode via hole through the pixel definition layer, so that the cathode is electrically connected to the auxiliary electrode through the conductive structure; the orthographic projection of the conductive structure on the driving substrate covers the orthographic projection of the auxiliary electrode on the driving substrate; In a direction perpendicular to the driving substrate, the longitudinal section of the side wall of the intermediate insulating structure is a trapezoid, and the cross section of the side wall of the intermediate insulating structure gradually decreases in a direction approaching the top structure; The surface of the pixel definition layer away from the driving substrate has a first via hole and a second via hole arranged at intervals, the orthographic projection of the first via hole on the auxiliary electrode is located inside the auxiliary electrode so that the auxiliary electrode is partially exposed to the pixel definition layer; the orthographic projection of the second via hole on the anode is located inside the anode so that the anode is partially exposed to the pixel definition layer; the conductive structure is electrically connected to the auxiliary electrode through the first via hole; wherein the spacing between adjacent first via holes and second via holes is greater than 5 microns; One end of the first via hole close to the conductive isolation structure is disposed in contact with the conductive structure, and one end of the first via hole away from the conductive isolation structure is disposed in contact with the auxiliary electrode.

2. The display panel according to claim 1, characterized in that: The distance between the edge of the first via hole and the edge of the corresponding auxiliary electrode is 2-3 microns.

3. The display panel according to claim 1, characterized in that: The auxiliary electrode and the anode are formed by patterning the same conductive layer; a plurality of the auxiliary electrodes are interconnected to form a mesh electrode, and the auxiliary electrodes are located at the side of the anode.

4. The display panel according to claim 3, characterized in that: The distance between adjacent anodes and auxiliary electrodes is 3-4 microns.

5. The display panel according to claim 1, characterized in that: The conductive structure includes a metal oxide.

6. The display panel according to claim 1, characterized in that: The conductive structure includes a transition metal oxide.

7. The display panel according to claim 1, characterized in that: In a direction perpendicular to the driving substrate, the thickness of the intermediate insulating structure is greater than or equal to the thickness of the conductive structure.

8. The display panel according to claim 1, characterized in that: The top structure and the middle insulating structure are both made of transparent insulating materials.

9. The display panel according to claim 1, characterized in that: The display panel further includes an encapsulation layer, which covers the sub-pixel, and covers a side wall of the conductive isolation structure and a portion of an upper surface of the conductive isolation structure.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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