Display panel and display device

Abstract

The present application provides a display panel and a display device. The display panel includes: an array substrate; a first electrode layer including a plurality of first anodes; an isolation structure having a plurality of pixel openings exposing the first anodes; for every two adjacent pixel openings, a first light-emitting layer, a cathode electrode, a second light-emitting layer and a second anode are stacked in one pixel opening, and a first light-emitting layer, a cathode electrode, a third light-emitting layer and a second anode are stacked in the other pixel opening. The second light-emitting layer and the third light-emitting layer are arranged in the same layer. A cathode connection layer and an anode connection layer are further provided in the isolation structure, and the first electrode layer further includes an auxiliary anode; the cathode connection layer is in the same layer as the cathode electrode and is electrically connected thereto; the anode connection layer is in the same layer as the second anode and is electrically connected to the corresponding second anode; the cathode connection layer has a hollow portion, and the anode connection layer is electrically connected to the corresponding auxiliary anode through a conductive portion passing through the hollow portion. The display panel can extend the service life.

Description

Technical Field

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

[0002] In recent years, with the rapid development of Organic Light Emitting Diode (OLED) technology, its technology has been continuously innovated and has been applied in multiple fields, making its market prospect broad.

[0003] OLED technology is a current-type organic light-emitting device that emits light through the injection and recombination of carriers, and its light-emitting intensity is proportional to the injected current. Due to its advantages such as low driving voltage, high contrast ratio, low power consumption, and easy fabrication, this technology shows great potential in the field of display technologies. Especially in the field of consumer electronics, OLED has gradually become the mainstream choice in the market due to its high color performance, thin and light design, etc.

[0004] Generally, an OLED display panel is composed of sub-pixels of three colors: red, green, and blue. However, due to the relatively low luminous efficiency of blue OLEDs, a relatively large current is required for driving, resulting in a relatively short lifespan of blue OLEDs. Therefore, the short lifespan of blue OLEDs greatly limits the service life of OLED display panels and becomes one of the thresholds for the widespread use of OLEDs. Summary of the Invention

[0005] The present application provides a display panel and a display device, aiming to solve the problem of the short service life of OLED display panels in the prior art.

[0006] To solve the above technical problems, the first technical solution provided by the present application is: to provide a display panel. The display panel includes:

[0007] An array substrate, including a driving circuit layer;

[0008] A first electrode layer, disposed on the driving circuit layer, including a plurality of first anodes electrically connected to the driving circuit layer;

[0009] An isolation structure, disposed on the array substrate, having a plurality of pixel openings, and the pixel openings expose the first anodes;

[0010] Wherein, for every two adjacent pixel openings, in one pixel opening, a first light-emitting layer, a cathode electrode, a second light-emitting layer, and a second anode are stacked; in the other pixel opening, a first light-emitting layer, a cathode electrode, a third light-emitting layer, and a second anode are stacked; wherein, the second light-emitting layer and the third light-emitting layer are disposed in the same layer and can be exchanged with the first light-emitting layer in position;

[0011] Among them, a cathode connection layer and an anode connection layer are further provided in the isolation structure, and the first electrode layer further includes an auxiliary anode electrically connected to the driving circuit layer; the cathode connection layer is on the same layer as the cathode electrode and is electrically connected; the anode connection layer is on the same layer as the second anode and is electrically connected to the corresponding second anode; the cathode connection layer has a hollow portion, and the anode connection layer is electrically connected to the corresponding auxiliary anode through a conductive portion passing through the hollow portion.

[0012] In some embodiments, along the direction away from the array substrate, the isolation structure includes a pixel definition layer, a first insulating base layer, a second insulating base layer, and a top structure stacked in sequence; the top structure extends beyond the second insulating base layer in a plane parallel to the array substrate;

[0013] The cathode connection layer is disposed between the pixel definition layer and the first insulating base layer, and the anode connection layer is disposed between the first insulating base layer and the second insulating base layer; wherein, the first insulating base layer also fills the hollow portion, and the first insulating base layer has an anode via passing through the hollow portion and the pixel definition layer, and the conductive portion is disposed in the anode via.

[0014] In some embodiments, the first light-emitting layer is disposed between the first anode and the cathode electrode, and the second light-emitting layer and the third light-emitting layer are disposed between the cathode electrode and the second anode;

[0015] Among them, within the pixel opening, the first anode, the first light-emitting layer, and the cathode electrode form a first sub-pixel, the cathode electrode, the second light-emitting layer, and the second anode form a second sub-pixel, and the cathode electrode, the third light-emitting layer, and the second anode form a third sub-pixel; two first sub-pixels, one second sub-pixel, and one third sub-pixel within two adjacent pixel openings form a pixel unit.

[0016] In some embodiments, the auxiliary anode is located between adjacent first anodes;

[0017] In the same pixel unit, the first anodes of the two first sub-pixels are connected to each other through a connection portion, the connection portion is located in the first electrode layer, extends along the isolation structure and avoids the auxiliary anode; or, the first anodes of the two first sub-pixels are independent of each other, and the two first anodes are connected to the same driving signal.

[0018] In some embodiments, in the same pixel unit, the two first sub-pixels share the same first anode, and the two auxiliary anodes corresponding to the second sub-pixel and the third sub-pixel are located on the same side or opposite sides of the same first anode.

[0019] In some embodiments, the second light-emitting layer and the third light-emitting layer are disposed between the first anode and the cathode electrode, and the first light-emitting layer is disposed between the cathode electrode and the second anode;

[0020] Among them, within the pixel aperture, the first anode, the second light-emitting layer, and the cathode electrode form a second sub-pixel, the first anode, the third light-emitting layer, and the cathode electrode form a third sub-pixel, and the cathode electrode, the first light-emitting layer, and the second anode form a first sub-pixel; two first sub-pixels, one second sub-pixel, and one third sub-pixel within adjacent two pixel apertures form a pixel unit.

[0021] In some embodiments, within each pixel unit, the auxiliary anode is located between two first anodes, and the second anodes of the two first sub-pixels are both in contact electrical connection with the anode connection layer.

[0022] In some embodiments, there is at least one anode via between each anode connection layer and the corresponding auxiliary anode.

[0023] In some embodiments, the aperture area of the pixel aperture corresponding to the second light-emitting layer is different from the aperture area of the pixel aperture corresponding to the third light-emitting layer.

[0024] To solve the above technical problems, the second technical solution provided by this application is: to provide a display device. The display device includes:

[0025] A display panel, which is the display panel provided by the above technical solution;

[0026] A control circuit board, electrically connected to the display panel, for controlling the display panel to display corresponding images.

[0027] Advantages of the present application: Different from the prior art, the present application provides a display panel and a display device. The display panel includes an array substrate and a plurality of sub-pixels disposed on the array substrate. By laminating a first light-emitting layer, a cathode electrode, a second light-emitting layer, and a second anode in one of every two adjacent pixel apertures, and laminating a first light-emitting layer, a cathode electrode, a third light-emitting layer, and a second anode in the other pixel aperture, and making the second light-emitting layer and the third light-emitting layer be disposed in the same layer and exchangeable with the first light-emitting layer, so that the first light-emitting layer is stacked with the second light-emitting layer and the third light-emitting layer, the area of the first light-emitting layer is increased to a large extent. The first light-emitting layer can be a blue light-emitting layer, thereby effectively improving the lifespan of the blue sub-pixels, and further extending the service life of the display panel. Further, by stacking the first light-emitting layer with the second light-emitting layer and the third light-emitting layer, the first light-emitting layer does not need to separately occupy the pixel aperture, and the display area of the pixel unit can also be reduced, and the pixel density of the display panel can be further improved, thereby enhancing the display effect. By providing a cathode connection layer and an anode connection layer in the isolation structure and providing an auxiliary anode in the first electrode layer, the cathode connection layer is disposed in the same layer as the cathode electrode and electrically connected, thereby realizing the entire surface connection of the cathode, which is beneficial to the uniformity of the cathode signal. By making the anode connection layer be disposed in the same layer as the second anode and electrically connected to the corresponding second anode to introduce the second anode into the isolation structure; by making the cathode connection layer have a hollow portion, so that the anode connection layer is electrically connected to the corresponding auxiliary anode through a conductive portion passing through the hollow portion, thereby realizing the electrical connection between the second anode and the auxiliary anode to realize the signal connection of the upper light-emitting device, so as to drive each light-emitting device to emit light. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without any creative effort, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic longitudinal sectional structure diagram of the display panel provided by the first embodiment of the present application;

[0030] Figure 2 It is a schematic longitudinal sectional structure diagram of the display panel provided by the second embodiment of the present application;

[0031] Figure 3 is Figure 2 a schematic plan structure diagram of each electrode provided by one embodiment in;

[0032] Figure 4 is Figure 2 a schematic plan structure diagram of each electrode provided by another embodiment in;

[0033] Figure 5 It is a schematic longitudinal sectional structure diagram of a display panel provided in the third embodiment of the present application;

[0034] Figure 6 is Figure 5 a schematic plan structure diagram provided by an embodiment of each electrode in

[0035] Figure 7 It is a schematic longitudinal sectional structure diagram of a display panel provided in the fourth embodiment of the present application;

[0036] Figure 8 is Figure 7 a schematic plan structure diagram provided by an embodiment of each electrode in

[0037] Figure 9 It is a schematic structure diagram of a display device provided by an embodiment of the present application.

[0038] Reference numerals:

[0039] 100, display panel; 10, array substrate; 11, substrate; 12, driving circuit layer; 20, first electrode layer; 21, first anode; 22, auxiliary anode; 23, connection part; 30, isolation structure; 31, pixel opening; 32, pixel definition layer; 33, cathode connection layer; 331, hollow part; 34, first insulating base layer; 341, anode via; 35, conductive part; 36, anode connection layer; 37, second insulating base layer; 38, top structure; 41, first light-emitting layer; 42, second light-emitting layer; 43, third light-emitting layer; 44, cathode electrode; 45, second anode; 50, encapsulation layer; 200, control circuit board; P, pixel unit; P1, first sub-pixel; P2, second sub-pixel; P3, third sub-pixel. Detailed implementation manners

[0040] The following will describe the solutions of the embodiments of the present application in detail with reference to the accompanying drawings of the specification.

[0041] In the following description, specific details such as specific system structures, interfaces, and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the present application.

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0043] The terms "first", "second", and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise 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 positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, then the directional indications will also change accordingly. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0044] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0045] The present application will be described in detail below with reference to the drawings and embodiments.

[0046] Please refer to Figure 1 , Figure 1 which is a schematic longitudinal cross-sectional structure diagram of a display panel provided by the first embodiment of this application. In this embodiment, a display panel 100 is provided. The display panel 100 can be applied to devices that require display, such as mobile phones, tablets, vehicles, computers, and electronic wearable devices. The display panel 100 includes an array substrate 10 and an isolation structure 30 and a plurality of sub-pixels disposed on the array substrate 10.

[0047] The array substrate 10 includes a substrate 11 and a driving circuit layer 12. Among them, the substrate 11 is used to carry the driving circuit layer 12, the isolation structure 30, and the sub-pixels. Specifically, the substrate 11 can be a glass substrate, a silicon substrate, or a flexible substrate, which can be specifically set according to actual needs. Among them, the driving circuit layer 12 is disposed on the substrate 11, and the driving circuit layer 12 includes a plurality of pixel driving circuits (not shown in the figure), which are used to drive the sub-pixels to emit light. Specifically, the pixel driving circuit includes a plurality of semiconductor driving devices. In some embodiments, a complementary metal oxide semiconductor (CMOS) device can be used as the semiconductor driving device during driving to form a pixel driving circuit, thereby driving the sub-pixels to emit light.

[0048] The first electrode layer 20 is disposed on the driving circuit layer 12 and includes a plurality of first anodes 21 electrically connected to the driving circuit layer 12. The first anode 21 can be used as the anode of some of the sub-pixels. The material of the first electrode layer 20 can include one or a combination of two of metal and metal oxide. The metal material can be a metal conductive material such as gold (Au), silver (Ag), copper (Cu), aluminum (Al), etc., and the metal oxide can be a metal oxide conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), etc. For example, the first anode 21 can be a multi-layer structure of an ITO layer - a metal layer - an ITO layer, which can be specifically set according to actual needs. The first electrode layer 20 can be specifically formed by patterning through a photolithography process, or can also be formed by using other patterning processes.

[0049] The isolation structure 30 is disposed on the array substrate 10, has a plurality of pixel openings 31, and the pixel openings 31 expose the first anode 21. The isolation structure 30 is used to separate the sub-pixels and accommodate the sub-pixels in the pixel openings 31, thereby preventing the crosstalk problem between the sub-pixels. The isolation structure 30 can also be specifically formed by patterning through a photolithography process, or can also be formed by using other patterning processes.

[0050] In a specific embodiment of the present application, for every two adjacent pixel openings 31, a first light-emitting layer 41, a cathode electrode 44, a second light-emitting layer 42, and a second anode 45 are stacked inside one pixel opening 31, and a first light-emitting layer 41, a cathode electrode 44, a third light-emitting layer 43, and a second anode 45 are stacked inside the other pixel opening 31; among them, the second light-emitting layer 42 and the third light-emitting layer 43 are disposed in the same layer and can exchange positions with the first light-emitting layer 41.

[0051] That is, every two adjacent pixel openings 31 form a group. In one pixel opening 31, a first light-emitting layer 41, a cathode electrode 44, a second light-emitting layer 42, and a second anode 45 are sequentially stacked. In the other pixel opening 31, a first light-emitting layer 41, a cathode electrode 44, a third light-emitting layer 43, and a second anode 45 are sequentially stacked. Thus, the first anode 21, the first light-emitting layer 41, and the cathode electrode 44 form a first sub-pixel P1; the cathode electrode 44, the second light-emitting layer 42, and the second anode 45 form a second sub-pixel P2; and the cathode electrode 44, the third light-emitting layer 43, and the second anode 45 form a third sub-pixel P3. Alternatively, in one pixel opening 31, a second light-emitting layer 42, a cathode electrode 44, a first light-emitting layer 41, and a second anode 45 are sequentially stacked. In the other pixel opening 31, a third light-emitting layer 43, a cathode electrode 44, a first light-emitting layer 41, and a second anode 45 are sequentially stacked. Thus, the first anode 21, the second light-emitting layer 42, and the cathode electrode 44 form a second sub-pixel P2; the first anode 21, the third light-emitting layer 43, and the cathode electrode 44 form a third sub-pixel P3; and the cathode electrode 44, the first light-emitting layer 41, and the second anode 45 form a first sub-pixel P1. Among them, the first light-emitting layer 41, the second light-emitting layer 42, and the third light-emitting layer 43 are a blue light-emitting layer, a red light-emitting layer, and a green light-emitting layer respectively. The material of the light-emitting layer is specifically an organic light-emitting material, that is, the sub-pixel is an OLED light-emitting device. In other embodiments, the sub-pixel may also be other current-driven light-emitting devices, such as a light-emitting diode (LED), a mini light-emitting diode (Mini LED), a micro light-emitting diode (Micro LED), etc.

[0052] It can be understood that two sub-pixels with different colors are stacked in each pixel opening 31, and the two sub-pixels share the cathode electrode 44. At the same time, the first sub-pixel P1 is provided in each of two adjacent pixel openings 31, the second sub-pixel P2 is provided in one of the pixel openings 31, and the third sub-pixel P3 is provided in the other pixel opening 31. Moreover, the second sub-pixel P2 and the third sub-pixel P3 are arranged on the same layer, and the first sub-pixel P1 is stacked on one side of the second sub-pixel P2 and the third sub-pixel P3 away from the array substrate 10 or on one side close to the array substrate 10 in the two pixel openings 31 respectively.

[0053] With the above settings, in each pixel aperture 31, two sub-pixels share the cathode electrode 44, which can not only simplify the structures of the two sub-pixels, but also reduce the number of insulating layers, making it easier to manufacture and facilitating the light emission of the sub-pixels. By stacking the first light-emitting layer 41 with the second light-emitting layer 42 and the third light-emitting layer 43, that is, stacking the first sub-pixel P1 with the second sub-pixel P2 and the third sub-pixel P3, the area of the first light-emitting layer 41 is increased to a large extent, that is, the light-emitting area of the first sub-pixel P1 is increased to a large extent, thereby increasing the light-emitting area of the blue sub-pixel to a large extent, effectively slowing down the attenuation of the light-emitting efficiency of the blue sub-pixel, thus effectively improving the lifespan of the blue sub-pixel, and further extending the service life of the display panel 100, such that the service life of the display panel 100 is no longer limited by the lifespan of the blue sub-pixel.

[0054] Among them, a cathode connection layer 33 and an anode connection layer 36 are further provided in the isolation structure 30, and the first electrode layer 20 further includes an auxiliary anode 22 electrically connected to the driving circuit layer 12; the cathode connection layer 33 is in the same layer as the cathode electrode 44 and is electrically connected; the anode connection layer 36 is in the same layer as the second anode 45 and is electrically connected to the corresponding second anode 45; the cathode connection layer 33 has a hollow portion 331, and the anode connection layer 36 is electrically connected to the corresponding auxiliary anode 22 through a conductive portion 35 passing through the hollow portion 331.

[0055] Specifically, a cathode connection layer 33 and an anode connection layer 36 are further provided in the isolation structure 30. Among them, the cathode connection layer 33 is in the same layer as the cathode electrode 44 and is electrically connected to the cathode electrode 44; that is, by providing the cathode connection layer 33 in the isolation structure 30, the cathode electrodes 44 are connected through the cathode connection layer 33 to form a full-surface electrode, thereby realizing the uniformity of the full-surface signal of the cathode electrode 44.

[0056] Among them, the first electrode layer 20 further includes an auxiliary anode 22, and the auxiliary anode 22 is used to electrically connect to the second anode 45 located in the upper layer in the pixel aperture 31, so as to transmit the driving signal to the sub-pixel located in the upper layer in the pixel aperture 31; the auxiliary anode 22 can be specifically disposed between the array substrate 10 and the isolation structure 30, that is, below the isolation structure 30, and the isolation structure 30 covers the auxiliary anode 22. Further, the anode connection layer 36 is in the same layer as the second anode 45 and is electrically connected to the corresponding second anode 45 to introduce the second anode 45 to the position of the isolation structure 30. By making the cathode connection layer 33 have a hollow portion 331 and providing a conductive portion 35 passing through the hollow portion 331 to avoid the cathode connection layer 33, the relative two ends of the conductive portion 35 are respectively connected to the auxiliary anode 22 and the anode connection layer 36, thereby realizing the transmission of the driving signal in the driving circuit layer 12 to the second anode 45 through the auxiliary anode 22, the conductive portion 35 and the anode connection layer 36, realizing the signal connection of the upper light-emitting device, and driving the sub-pixel in the upper layer to emit light.

[0057] Please refer to Figure 2 , Figure 2 which is a schematic longitudinal sectional structure diagram of a display panel provided by the second embodiment of the present application. In a specific embodiment, in a direction away from the array substrate 10, the isolation structure 30 includes a pixel definition layer 32, a first insulating base layer 34, a second insulating base layer 37, and a top structure 38 that are sequentially stacked; the top structure 38 extends beyond the second insulating base layer 37 in a plane parallel to the array substrate 10. A cathode connection layer 33 is disposed between the pixel definition layer 32 and the first insulating base layer 34, and an anode connection layer 36 is disposed between the first insulating base layer 34 and the second insulating base layer 37; wherein, the first insulating base layer 34 also fills the hollow portion 331, and an anode via 341 passing through the hollow portion 331 and the pixel definition layer 32 is formed on the first insulating base layer 34, and a conductive portion 35 is disposed in the anode via 341.

[0058] Among them, the pixel definition layer 32 protrudes from the array substrate 10, defining a plurality of pixel openings 31, and the orthographic projection of the pixel openings 31 on the array substrate 10 overlaps with the first anode 21 to expose the first anode 21, so that the pixel openings 31 can be used to accommodate sub-pixels and separate the light-emitting layers of the sub-pixels, thereby avoiding color crosstalk between pixels. The pixel openings 31 are arranged in an array, and can be specifically arranged according to the arrangement design of the sub-pixels. The pixel definition layer 32 can be specifically formed by patterning through a photolithography process, or can also be prepared by other patterning processes.

[0059] The cathode connection layer 33 is disposed on the pixel definition layer 32 and is used to connect the cathode electrodes 44, so as to conduct between the cathode electrodes 44 of the sub-pixels through the cathode connection layer 33 to form a whole-surface connection, thereby improving the uniformity of the whole-surface signal of the cathode electrodes 44. The cathode connection layer 33 can be specifically formed by a patterning process.

[0060] The first insulating base layer 34 is disposed on the cathode connection layer 33, which is used to insulate the cathode connection layer 33 from the anode insulating layer, avoiding the problem of short circuit. At the same time, the first insulating layer can also increase the height of the isolation structure 30, so as to increase the depth of the pixel opening 31, so as to better accommodate the various layer structures of the sub-pixels stacked in the pixel opening 31. Similarly, the first insulating base layer 34 can also be formed by a patterning process. Specifically, the cathode connection layer 33 has a hollow portion 331, and the orthographic projection of the hollow portion 331 on the array substrate 10 overlaps with the auxiliary anode 22. At the same time, the first insulating base layer 34 is filled in the hollow portion 331, and then an anode via 341 is opened at the position corresponding to the hollow portion 331 on the first insulating base layer 34 to communicate with the auxiliary anode 22, so as to dispose a conductive portion 35 in the anode via 341, so that the conductive portion 35 is connected to the auxiliary anode 22. That is, by providing the hollow portion 331 in the cathode connection portion 23, after the first insulating base layer 34 fills the hollow portion 331 and then opens the anode via 341, the conductive portion 35 is avoided from the cathode connection layer 33 and is insulated from the cathode connection layer 33, preventing the problem of short circuit between the anode signal and the cathode signal.

[0061] The anode connection layer 36 is disposed on the first insulating base layer 34 and covers the anode via 341, and is electrically connected to the conductive portion 35, so that the anode connection layer 36 is electrically connected to the auxiliary anode 22 through the conductive portion 35. The anode connection layer 36 is used to connect the corresponding second anode 45, so as to realize the connection of the anode signal of the sub-pixel located in the upper layer in the pixel opening 31. It should be noted that in the present application, the upper layer refers to that among the two sub-pixels stacked in the pixel opening 31, the sub-pixel closer to the array substrate 10 is the sub-pixel located in the lower layer, and the other sub-pixel stacked on the lower sub-pixel is the sub-pixel located in the upper layer.

[0062] The second insulating base layer 37 is disposed on the anode connection layer 36 and surrounds the pixel opening 31. The top structure 38 is disposed on the second insulating base layer 37 and extends beyond the second insulating base layer 37 in a plane parallel to the array substrate 10, so that the portion extending beyond the second insulating base layer 37 is suspended to form a hanging structure, that is, the top structure 38 and the second insulating base layer 37 form a "T" shaped structure. Specifically, the second insulating base portion does not extend beyond the anode connection layer 36 on the side close to the pixel opening 31, which is beneficial to the contact connection between the second anode 45 and the anode connection layer 36. The second insulating base layer 37 and the top structure 38 can be specifically prepared in different manufacturing processes, or can also be prepared in the same manufacturing process. For example, SiO 2 / SiN x / SiNO material, by utilizing the different etching rates of different materials to achieve a "T" - shaped appearance. In the process of evaporating the first light - emitting layer 41, the second light - emitting layer 42, the third light - emitting layer 43, the cathode electrode 44, and the second anode 45, due to the existence of the overhanging structure, each light - emitting layer, the cathode electrode 44, and the second anode 45 can form a stepped deposition at the bottom of the pixel opening 31. After a single etching to form a single sub - pixel, an inorganic encapsulation layer 50 can be used to encapsulate and protect the monochromatic light - emitting layer and the cathode electrode 44 to form an etching protection layer, and then the preparation of the organic light - emitting layers of other colors, the cathode electrode 44, and the second anode 45 can be carried out one by one. That is, due to the existence of the overhanging structure, it can be used to replace the Fine Metal Mask (FMM) and directly prepare each organic light - emitting layer, that is, each sub - pixel can be prepared without an FMM.

[0063] In this embodiment, the first light - emitting layer 41 is disposed between the first anode 21 and the cathode electrode 44, and the second light - emitting layer 42 and the third light - emitting layer 43 are disposed between the cathode electrode 44 and the second anode 45. Among them, within the pixel opening 31, the first anode 21, the first light - emitting layer 41, and the cathode electrode 44 constitute the first sub - pixel P1, the cathode electrode 44, the second light - emitting layer 42, and the second anode 45 constitute the second sub - pixel P2, and the cathode electrode 44, the third light - emitting layer 43, and the second anode 45 constitute the third sub - pixel P3; two first sub - pixels P1, one second sub - pixel P2, and one third sub - pixel P3 within two adjacent pixel openings 31 constitute a pixel unit P. That is, the first sub - pixel P1 is located in the lower layer, and the second sub - pixel P2 and the third sub - pixel P3 are located in the upper layer. By stacking the first sub - pixel P1 below the second sub - pixel P2 and the third sub - pixel P3, the light - emitting area of the first sub - pixel P1 in each pixel unit P is equivalent to the sum of the light - emitting areas of the second sub - pixel P2 and the third sub - pixel P3, which can effectively expand the light - emitting area of the first sub - pixel P1, thereby extending the life of the first sub - pixel P1; moreover, the first sub - pixel P1 does not need to separately occupy the pixel opening 31, and can also effectively improve the pixel density and further improve the display effect.

[0064] Please refer to Figure 2 and Figure 3 , Figure 3 is Figure 2 a schematic plan view of the planar structure provided by an embodiment of each electrode in

[0065] Specifically, the auxiliary anodes 22 are dispersedly arranged among the first anodes 21. For the same pixel unit P, the first anodes 21 of two first sub-pixels P1 are interconnected through a connection portion 23. The connection portion 23 is on the same layer as the first anode 21 and is formed through the same patterning process. It can be understood that in the same pixel unit P, the two first anodes 21 are an integral electrode structure, so that the two sub-pixels receive the same driving signal, making the light-emitting effects of the two first light-emitting layers 41 more balanced, thereby improving the display effect. Among them, the connection portion 23 is below the isolation structure 30, extends along the extending direction of the isolation structure 30 and avoids the auxiliary anode 22 to prevent short-circuiting with the auxiliary anode 22.

[0066] Please refer to Figure 2 and Figure 4 , Figure 4 is Figure 2 a schematic plan view of the planar structure provided by another embodiment of the electrodes in

[0067] Further, in the same pixel unit P, the two first anodes 21 are connected to the same driving signal, that is, connected to the same pixel driving circuit. In the same frame, the driving currents of the two first sub-pixels P1 are the same, making the light output of the two first light-emitting layers 41 more balanced, thereby improving the display effect.

[0068] Alternatively, in some embodiments, the two first anodes 21 can also be connected to different driving signals, that is, connected to different pixel driving circuits, so that the two sub-pixels can be independently driven. For example, when the required brightness of the first sub-pixel P1 is low, only one of the first sub-pixels P1 can be driven to emit light, and the other does not emit light, thereby further improving the lifespan of the first sub-pixel P1.

[0069] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic longitudinal cross-sectional structure diagram of the display panel provided by the third embodiment of the present application, Figure 6 is Figure 5 a schematic plan view of the planar structure provided by an embodiment of the electrodes in Figure 2Similar to the embodiments, the first sub-pixel P1 is located in the lower layer within the pixel opening 31, and the second sub-pixel P2 and the third sub-pixel P3 are located in the upper layer within the pixel opening 31. Different from Figure 2 the embodiments, in the same pixel unit P, two first sub-pixels P1 share the same first anode 21, and two auxiliary anodes 22 corresponding to the second sub-pixel P2 and the third sub-pixel P3 are located on the same side or opposite sides of the same first anode 21.

[0070] In this embodiment, in the same pixel unit P, by making two first sub-pixels P1 share the same first anode 21, the auxiliary anode 22 corresponding to the second sub-pixel P2 and the auxiliary anode 22 corresponding to the third sub-pixel P3 are located on the same side or opposite sides of the shared first anode 21, so that there is no need to provide an anode connection layer 36 and an anode via 341 in the isolation structure 30 on the side where two pixel openings 31 are close to each other. Therefore, the thickness in the direction parallel to the array substrate 10 is narrower, the two pixel openings 31 are more compact, the distance between pixels is further reduced, and the pixel density can be further improved. Moreover, by making two first sub-pixels P1 share the same first anode 21, the number of first anodes 21 can be reduced, and the structure of the first electrode layer can be further simplified.

[0071] Please refer to Figure 7 , Figure 7 which is a schematic longitudinal cross-sectional structure diagram of a display panel provided in the fourth embodiment of the present application. In this embodiment, the second light-emitting layer 42 and the third light-emitting layer 43 are disposed between the first anode 21 and the cathode electrode 44, and the first light-emitting layer 41 is disposed between the cathode electrode 44 and the second anode 45. Among them, within the pixel opening 31, the first anode 21, the second light-emitting layer 42 and the cathode electrode 44 constitute the second sub-pixel P2, the first anode 21, the third light-emitting layer 43 and the cathode electrode 44 constitute the third sub-pixel P3, the cathode electrode 44, the first light-emitting layer 41 and the second anode 45 constitute the first sub-pixel P1; two first sub-pixels P1, one second sub-pixel P2 and one third sub-pixel P3 within two adjacent pixel openings 31 constitute a pixel unit P. That is, in this embodiment, in each pixel unit P, the second sub-pixel P2 and the third sub-pixel P3 are located in the lower layer within their respective pixel openings 31, and two first sub-pixels P1 are located in the upper layer within their respective pixel openings 31.

[0072] Further, in each pixel unit P, the auxiliary anode 22 is located between two first anodes 21, and the second anodes 45 of two first sub-pixels P1 are both in contact electrical connection with the anode connection layer 36. That is, in each pixel unit P, the anode connection layer 36 is located in the isolation structure 30 on the side where two second anodes 45 are close to each other, and both two second anodes 45 are in contact electrical connection with the anode connection layer 36, and are electrically connected to the same auxiliary anode 22 through the same anode connection layer 36 and the conductive part 35. It can be understood that in each pixel unit P, two first sub-pixels P1 share the anode connection layer 36, the conductive part 35, and the auxiliary anode 22. This setting method can effectively reduce the number of the anode connection layer 36, the conductive part 35, and the auxiliary anode 22, thereby simplifying the manufacturing process and being easy to fabricate. Moreover, it can further improve the stability of driving signal transmission and increase the yield of the display panel 100.

[0073] Further, in the embodiment of the present application, the display panel 100 further includes a packaging layer 50. The packaging layer 50 covers each sub-pixel and the isolation structure 30, and is filled in each pixel opening 31 to package the sub-pixels to prevent the organic light-emitting layer from failing due to the invasion of external water and oxygen. Specifically, the overall packaging can be carried out by using a stacked structure of an inorganic insulating layer + an organic insulating layer + an inorganic insulating layer.

[0074] Please refer to Figure 4 and Figure 8 , Figure 8 is Figure 7 a schematic plan view of the planar structure provided by an embodiment of each electrode in

[0075] As Figure 4 shown, in this embodiment, one anode via 341 is provided between each anode connection layer 36 and the corresponding auxiliary anode 22 to realize the connection of the anode signal through the anode via 341. Further, in this embodiment, without affecting other film layers, the aperture of the anode via 341 can be made as large as possible, so that the critical dimension of the conductive part 35 in the direction parallel to the array substrate 10 is larger, thereby improving the reliability of signal connection. Further, the hole shape of the anode via 341 can be a tapered hole or a stepped hole, which is beneficial to the filling of the conductive part 35 in the anode via 341 and further improves the reliability of signal connection.

[0076] As Figure 8As shown, in this embodiment, two anode vias 341 are provided between each anode connection layer 36 and the corresponding auxiliary anode 22, thereby improving the reliability of signal connection. Further, in this embodiment, without affecting other film layers, the aperture of the anode via 341 can also be made as large as possible, so that the critical dimension of the conductive portion 35 in the direction parallel to the array substrate 10 is larger; similarly, the shape of the anode via 341 can also be a tapered hole or a stepped hole, which is beneficial to the filling of the conductive portion 35 in the anode via 341, further improving the reliability of signal connection.

[0077] In the above embodiment, the opening area of the pixel opening 31 corresponding to the second light-emitting layer 42 is different from the opening area of the pixel opening 31 corresponding to the third light-emitting layer 43. Specifically, the opening area of the corresponding pixel opening 31 can be designed according to the luminous efficiency and attenuation rate of the second light-emitting layer 42 and the third light-emitting layer 43. For example, the second light-emitting layer 42 is a red light-emitting layer, and the third light-emitting layer 43 is a green light-emitting layer. Since the durability of the green light-emitting layer is higher than that of the red light-emitting layer, the pixel opening 31 corresponding to the red light-emitting layer can be designed to be larger, and the pixel opening 31 corresponding to the green light-emitting layer is relatively smaller, so that the lifetimes of the two sub-pixels are closer, the luminous efficiencies are closer, and the lifetime and display effect of the display panel 100 are further improved.

[0078] Please refer to Figure 9 , Figure 9 is a schematic structural diagram of a display device provided by an embodiment of the present application. In this embodiment, a display device is provided. The display device can be used in display fields such as tablets, mobile phones, vehicles, VR glasses, lighting devices, etc.

[0079] The display device includes a display panel 100 and a control circuit board 200. Among them, the control circuit board 200 is electrically connected to the display panel 100 and is used to provide various driving signals, power supply signals, and other driving signals required by the display panel 100 to the display panel 100, so as to control the display panel 100 to display corresponding images. Among them, the specific structure and function of the display panel 100 are the same as or similar to those of the display panel 100 in the above embodiment, and the same technical effects can be achieved. For specific reference, please refer to the above relevant introduction.

[0080] The above is only the implementation manner of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, is equally included in the patent protection scope of the present application.

Claims

1. A display panel, comprising: An array substrate, comprising a driving circuit layer; A first electrode layer, disposed on the driving circuit layer, comprising a plurality of first anodes electrically connected to the driving circuit layer; An isolation structure, disposed on the array substrate, having a plurality of pixel openings, wherein the pixel openings expose the first anode; Characterized in that, for every two adjacent pixel openings, a first light-emitting layer, a cathode electrode, a second light-emitting layer, and a second anode are stacked in one of the pixel openings, and the first light-emitting layer, a cathode electrode, a third light-emitting layer, and the second anode are stacked in the other pixel opening; wherein the second light-emitting layer and the third light-emitting layer are arranged in the same layer, and can be exchanged with the first light-emitting layer; Wherein, the isolation structure is further provided with a cathode connection layer and an anode connection layer, and the first electrode layer further comprises an auxiliary anode electrically connected to the drive circuit layer; The cathode connection layer is in the same layer as the cathode electrode and is electrically connected to the cathode electrode, so that the cathode electrodes are connected through the cathode connection layer to form a whole-surface electrode; The anode connection layer is in the same layer as the second anode and is electrically connected to the corresponding second anode; the auxiliary anode is arranged between the array substrate and the isolation structure, and the isolation structure covers the auxiliary anode; the cathode connection layer has a hollow portion, and the orthographic projection of the hollow portion on the array substrate overlaps with the auxiliary anode, and the anode connection layer is electrically connected to the corresponding auxiliary anode through a conductive portion penetrating the hollow portion; The hollow portion is filled with a first insulating base layer, which has an anode via hole disposed in the hollow portion and the pixel definition layer, and the conductive portion is disposed in the anode via hole to insulate the conductive portion from the cathode connection layer.

2. The display panel according to claim 1, characterized in that: Along the direction away from the array substrate, the isolation structure includes a pixel definition layer, the first insulating base layer, the second insulating base layer and a top structure which are stacked in sequence; the top structure extends beyond the second insulating base layer on a plane parallel to the array substrate; The cathode connection layer is disposed between the pixel definition layer and the first insulating base layer, and the anode connection layer is disposed between the first insulating base layer and the second insulating base layer.

3. The display panel according to claim 2, characterized in that: The first light-emitting layer is disposed between the first anode and the cathode electrode, and the second light-emitting layer and the third light-emitting layer are disposed between the cathode electrode and the second anode; Among them, in the pixel opening, the first anode, the first light-emitting layer and the cathode electrode constitute a first sub-pixel, the cathode electrode, the second light-emitting layer and the second anode constitute a second sub-pixel, and the cathode electrode, the third light-emitting layer and the second anode constitute a third sub-pixel; two of the first sub-pixels, one of the second sub-pixels and one of the third sub-pixels in two adjacent pixel openings constitute a pixel unit.

4. The display panel according to claim 3, characterized in that: The auxiliary anode is located between adjacent first anodes; In the same pixel unit, the first anodes of two first sub-pixels are connected to each other through a connecting portion, and the connecting portion is located in the first electrode layer, extends along the isolation structure and avoids the auxiliary anode; or, the first anodes of two first sub-pixels are independent of each other, and the two first anodes are connected to the same driving signal.

5. The display panel according to claim 3, characterized in that: In the same pixel unit, two first sub-pixels share the same first anode, and two auxiliary anodes corresponding to the second sub-pixel and the third sub-pixel respectively are located on the same side or two opposite sides of the same first anode.

6. The display panel according to claim 2, characterized in that: The second light-emitting layer and the third light-emitting layer are arranged between the first anode and the cathode electrode, and the first light-emitting layer is arranged between the cathode electrode and the second anode; Among them, in the pixel opening, the first anode, the second light-emitting layer and the cathode electrode constitute a second sub-pixel, the first anode, the third light-emitting layer and the cathode electrode constitute a third sub-pixel, and the cathode electrode, the first light-emitting layer and the second anode constitute a first sub-pixel; two of the first sub-pixels, one of the second sub-pixels and one of the third sub-pixels in two adjacent pixel openings constitute a pixel unit.

7. The display panel according to claim 6, characterized in that: In each of the pixel units, the auxiliary anode is located between the two first anodes, and the second anodes of the two first sub-pixels are both in contact with and electrically connected to the anode connection layer.

8. The display panel according to claim 2, characterized in that: At least one anode via is provided between each anode connection layer and the corresponding auxiliary anode.

9. The display panel according to claim 1, characterized in that: An opening area of ​​a pixel opening corresponding to the second light emitting layer is different from an opening area of ​​a pixel opening corresponding to the third light emitting layer.

10. A display device, characterized in that: include: The display panel is a display panel as claimed in any one of claims 1 to 9; A control circuit board is electrically connected to the display panel and is used to control the display panel to display a corresponding image.

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