Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises an array substrate; the first electrode layer comprises a plurality of first anodes; the isolation structure is provided with a plurality of pixel openings exposing the first anodes; every two adjacent pixel openings are formed, a first light-emitting layer, a cathode electrode, a second light-emitting layer and a second anode are arranged in one pixel opening in a stacked mode, and a first light-emitting layer, a cathode electrode, a third light-emitting layer and a second anode are arranged in the other pixel opening in a stacked mode. The second light-emitting layer and the third light-emitting layer are arranged on the same layer. A cathode connecting layer and an anode connecting layer are further arranged in the isolation structure, and the first electrode layer further comprises an auxiliary anode; the cathode connecting layer and the cathode electrode are in the same layer and are electrically connected; the anode connecting layers are on the same layer as the second anodes and are electrically connected with the corresponding second anodes; the cathode connecting layer is provided with a hollow part, and the anode connecting layer is electrically connected with the corresponding auxiliary anode through a conductive part penetrating through the hollow part. The service life of the display panel can be prolonged.

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] 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 many fields, making its market prospects broad.

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

[0004] Generally, OLED display panels are composed of sub-pixels of red, green and blue. However, due to the low luminous efficiency of blue OLED, it requires a larger current to drive, which makes the life of blue OLED relatively short. Therefore, the short life of blue OLED has largely limited the service life of OLED display panels and has become one of the barriers to the widespread use of OLED. Summary of the invention

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

[0006] In order 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: 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; The isolation structure is disposed on the array substrate and has a plurality of pixel openings, wherein the pixel openings expose the first anode; Among them, 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; 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; Among them, the isolation structure is also provided with a cathode connection layer and an anode connection layer, and the first electrode layer also includes an auxiliary anode electrically connected to the driving circuit layer; the cathode connection layer is in the same layer as the cathode electrode and is electrically connected; 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.

[0007] In some embodiments, along a 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 on a plane parallel to the array substrate; The cathode connection layer is arranged between the pixel definition layer and the first insulating base layer, and the anode connection layer is arranged between the first insulating base layer and the second insulating base layer; wherein the first insulating base layer is also filled in the hollow portion, and the first insulating base layer has an anode via hole penetrating the hollow portion and the pixel definition layer, and the conductive part is arranged in the anode via hole.

[0008] 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; 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 first sub-pixels, one second sub-pixel and one third sub-pixel in two adjacent pixel openings constitute a pixel unit.

[0009] In some embodiments, the auxiliary anode is located between adjacent first anodes; In the same pixel unit, the first anodes of the two first sub-pixels are connected to each other through a connecting portion, which 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.

[0010] In some embodiments, 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 are located on the same side or two opposite sides of the same first anode.

[0011] 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; Among them, in the pixel opening, the first anode, the second light-emitting layer and the cathode electrode constitute the second sub-pixel, the first anode, the third light-emitting layer and the cathode electrode constitute the third sub-pixel, and the cathode electrode, the first light-emitting layer and the second anode constitute the first sub-pixel; two first sub-pixels, one second sub-pixel and one third sub-pixel in two adjacent pixel openings constitute a pixel unit.

[0012] In some embodiments, in each pixel unit, the auxiliary anode is located between the two first anodes, and the second anodes of the two first sub-pixels are both in contact and electrically connected to the anode connection layer.

[0013] In some embodiments, at least one anode via is disposed between each anode connection layer and the corresponding auxiliary anode.

[0014] In some embodiments, 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.

[0015] In order to solve the above technical problem, the second technical solution provided by the present application is to provide a display device. The display device includes: The display panel is the display panel provided by the above technical solution; The control circuit board is electrically connected to the display panel and is used to control the display panel to display corresponding images.

[0016] Beneficial effects 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 arranged on the array substrate. By making a first light-emitting layer, a cathode electrode, a second light-emitting layer and a second anode stacked in one of the pixel openings of each adjacent two pixel openings, and a first light-emitting layer, a cathode electrode, a third light-emitting layer and a second anode stacked in the other pixel opening, and making the second light-emitting layer and the third light-emitting layer arranged in the same layer, and being able to exchange positions 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 greatly increased, and the first light-emitting layer can be made a blue light-emitting layer, thereby effectively improving the life of the blue sub-pixel, thereby extending the service life of the display panel. Furthermore, by making the first light-emitting layer stacked with the second light-emitting layer and the third light-emitting layer, the first light-emitting layer does not need to occupy the pixel opening alone, and the display area of ​​the pixel unit can be reduced, and the pixel density of the display panel can be further improved, thereby improving the display effect. By arranging a cathode connection layer and an anode connection layer in the isolation structure, and arranging an auxiliary anode in the first electrode layer, the cathode connection layer is in the same layer as the cathode electrode and is electrically connected, thereby realizing the connection of the entire surface of the cathode, which is beneficial to the uniformity of the cathode signal. By making the anode connection layer in the same layer as the second anode and electrically connected to the corresponding second anode, the second anode is introduced into the isolation structure; by making the cathode connection layer have a hollow portion, the anode connection layer is electrically connected to the corresponding auxiliary anode through the conductive portion penetrating the hollow portion, thereby realizing the electrical connection between the second anode and the auxiliary anode, thereby realizing the signal connection of the upper light-emitting device, thereby driving each light-emitting device to emit light. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 is a schematic diagram of a longitudinal cross-sectional structure of a display panel provided in the first embodiment of the present application; Figure 2 is a schematic diagram of a longitudinal cross-sectional structure of a display panel provided in a second embodiment of the present application; Figure 3 yes Figure 2 A schematic diagram of a planar structure provided by an embodiment of each electrode; Figure 4 yes Figure 2 A schematic diagram of a planar structure provided by another embodiment of each electrode; Figure 5is a schematic diagram of a longitudinal cross-sectional structure of a display panel provided in a third embodiment of the present application; Figure 6 yes Figure 5 A schematic diagram of a planar structure provided by an embodiment of each electrode; Figure 7 is a schematic diagram of a longitudinal cross-sectional structure of a display panel provided in a fourth embodiment of the present application; Figure 8 yes Figure 7 A schematic diagram of a planar structure provided by an embodiment of each electrode; Fig. 9 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0019] Reference numerals: 100, display panel; 10, array substrate; 11, substrate; 12, driving circuit layer; 20, first electrode layer; 21, first anode; 22, auxiliary anode; 23, connecting 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 DESCRIPTION

[0020] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0021] 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.

[0022] 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.

[0023] The terms "first", "second" and "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" and "third" can explicitly 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. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application 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 that includes a series of steps or units is not limited to the listed steps or units, 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.

[0024] 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.

[0025] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0026] See also Figure 1 , Figure 1 1 is a schematic diagram of a longitudinal cross-sectional structure of a display panel provided in the first embodiment of the present application. In this embodiment, a display panel 100 is provided, and the display panel 100 can be applied to devices requiring 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.

[0027] The array substrate 10 includes a substrate 11 and a driving circuit layer 12. The substrate 11 is used to carry the driving circuit layer 12, the isolation structure 30 and the sub-pixels. The substrate 11 can be a glass substrate, a silicon substrate, or a flexible substrate, which can be set according to actual needs. The driving circuit layer 12 is arranged on the substrate 11, and the driving circuit layer 12 includes a plurality of pixel driving circuits (not shown) for driving the sub-pixels to emit light. Specifically, the pixel driving circuit includes a plurality of semiconductor driving devices. In some embodiments, a metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) device can be used as a semiconductor driving period to form a pixel driving circuit, thereby driving the sub-pixels to emit light.

[0028] The first electrode layer 20 is arranged 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 serve as the anode of a part of the sub-pixels. The material of the first electrode layer 20 may include one of metals and metal oxides or a combination of the two. The metal material may be a metal conductive material such as gold (Au), silver (Ag), copper (Cu), aluminum (Al), etc. The metal oxide may 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 may be a multilayer structure of ITO layer-metal layer-ITO layer, which can be specifically arranged according to actual needs. The first electrode layer 20 can be formed by patterning through a photolithography process, or it can also be formed by other patterning processes.

[0029] The isolation structure 30 is disposed on the array substrate 10 and 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 place the sub-pixels in the pixel openings 31, thereby preventing crosstalk between the sub-pixels. The isolation structure 30 can also be formed by patterning through a photolithography process, or can also be formed by other patterning processes.

[0030] In the 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 in 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 in the other pixel opening 31; wherein the second light-emitting layer 42 and the third light-emitting layer 43 are arranged in the same layer, and their positions can be interchanged with the first light-emitting layer 41.

[0031] That is, every two adjacent pixel openings 31 form a group, wherein the first light-emitting layer 41, the cathode electrode 44, the second light-emitting layer 42 and the second anode 45 are sequentially stacked in one pixel opening 31, and the first light-emitting layer 41, the cathode electrode 44, the third light-emitting layer 43 and the second anode 45 are sequentially stacked in the other pixel opening 31, so that 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. Alternatively, 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 one pixel opening 31, and a third light-emitting layer 43, a cathode electrode 44, a first light-emitting layer 41, and a second anode 45 are sequentially stacked in another pixel opening 31, so that 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, and the cathode electrode 44, the first light-emitting layer 41, and the second anode 45 constitute the 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 respectively a blue light-emitting layer, a red light-emitting layer, and a green light-emitting layer. 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 sub-millimeter light-emitting diode (Mini LED), a micro light-emitting diode (Micro LED), etc.

[0032] It can be understood that two sub-pixels of different colors are stacked in each pixel opening 31, and the two sub-pixels share a cathode electrode 44. At the same time, a first sub-pixel P1 is disposed in each of two adjacent pixel openings 31, a second sub-pixel P2 is disposed in one of the pixel openings 31, and a third sub-pixel P3 is disposed in the other pixel opening 31. Moreover, the second sub-pixel P2 and the third sub-pixel P3 are disposed in the same layer, and the first sub-pixel P1 is stacked in the two pixel openings 31 on the side of the second sub-pixel P2 and the third sub-pixel P3 away from the array substrate 10 or on the side close to the array substrate 10.

[0033] Through the above arrangement, in each pixel opening 31, two sub-pixels share the cathode electrode 44, which not only simplifies the structure of the two sub-pixels, but also reduces the number of insulating layers, is easier to manufacture, and is beneficial to 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, 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 greatly increased, that is, the light-emitting area of ​​the first sub-pixel P1 is greatly increased, thereby greatly increasing the light-emitting area of ​​the blue sub-pixel, which can effectively slow down the attenuation of the light-emitting efficiency of the blue sub-pixel, thereby effectively improving the life of the blue sub-pixel, and further extending the service life of the display panel 100, so that the service life of the display panel 100 is no longer limited by the life of the blue sub-pixel.

[0034] Among them, a cathode connection layer 33 and an anode connection layer 36 are also provided in the isolation structure 30, and the first electrode layer 20 also includes an auxiliary anode 22 electrically connected to the driving circuit layer 12; the cathode connection layer 33 is on the same layer as the cathode electrode 44 and is electrically connected; the anode connection layer 36 is on 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.

[0035] Specifically, a cathode connection layer 33 and an anode connection layer 36 are further provided in the isolation structure 30. 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 to form a whole-surface electrode through the cathode connection layer 33, thereby achieving uniformity of the whole-surface signal of the cathode electrode 44.

[0036] The first electrode layer 20 further includes an auxiliary anode 22, which is used to electrically connect the second anode 45 located in the upper layer of the pixel opening 31, so as to transmit the driving signal to the sub-pixel located in the upper layer of the pixel opening 31; the auxiliary anode 22 can be specifically arranged between the array substrate 10 and the isolation structure 30, that is, located 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, so as to introduce the second anode 45 into the position of the isolation structure 30. By making the cathode connection layer 33 have a hollow portion 331, and arranging the conductive portion 35 to penetrate the hollow portion 331 to avoid the cathode connection layer 33, so that the opposite ends of the conductive portion 35 are respectively connected to the auxiliary anode 22 and the anode connection layer 36, so as to realize that the driving signal in the driving circuit layer 12 is transmitted to the second anode 45 through the auxiliary anode 22, the conductive portion 35 and the anode connection layer 36, so as to realize the signal connection of the upper light-emitting device and drive the sub-pixel of the upper layer to emit light.

[0037] See also Figure 2 , Figure 2 : is a schematic diagram of the longitudinal cross-sectional structure of the display panel provided in the second embodiment of the present application. In a specific embodiment, in the 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 which are stacked in sequence; the top structure 38 extends beyond the second insulating base layer 37 on a plane parallel to the array substrate 10. The cathode connection layer 33 is arranged between the pixel definition layer 32 and the first insulating base layer 34, and the anode connection layer 36 is arranged between the first insulating base layer 34 and the second insulating base layer 37; wherein the first insulating base layer 34 is also filled in the hollow portion 331, and the first insulating base layer 34 has an anode via 341 which penetrates the hollow portion 331 and the pixel definition layer 32, and the conductive portion 35 is arranged in the anode via 341.

[0038] The pixel definition layer 32 protrudes from the array substrate 10, defines a plurality of pixel openings 31, and the orthographic projection of the pixel opening 31 on the array substrate 10 overlaps with the first anode 21 to expose the first anode 21, so that the pixel opening 31 can be used to accommodate sub-pixels and separate the light-emitting layers of each sub-pixel, thereby avoiding color crosstalk between pixels. The pixel openings 31 are arranged in an array, and can be arranged specifically according to the arrangement design of the sub-pixels. The pixel definition layer 32 can be formed by patterning using a photolithography process, or can also be prepared using other patterning processes.

[0039] The cathode connection layer 33 is disposed on the pixel definition layer 32 and is used to connect the cathode electrode 44, so that the cathode electrodes 44 of each sub-pixel are connected through the cathode connection layer 33 to form a full-surface connection, thereby improving the uniformity of the signal of the entire surface of the cathode electrode 44. The cathode connection layer 33 can be formed by a patterning process.

[0040] The first insulating base layer 34 is disposed on the cathode connection layer 33, and is used to insulate the cathode connection layer 33 from the anode insulating layer to avoid short circuit problems. At the same time, the first insulating layer can also increase the height of the isolation structure 30, so that the depth of the pixel opening 31 is increased, so as to better accommodate the various layers of the sub-pixel stacked in the upper layer of the pixel opening 31. Similarly, the first insulating base layer 34 can also be formed by patterning. Specifically, the cathode connection layer 33 has a hollow portion 331, and the positive 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 the anode via 341 is opened on the first insulating base layer 34 at a position corresponding to the hollow portion 331 to connect to the auxiliary anode 22, so that the conductive portion 35 is arranged in the anode via 341, so that the conductive portion 35 is connected to the auxiliary anode 22. That is, by providing a hollow portion 331 in the cathode connecting portion 23, the first insulating base layer 34 is filled with the hollow portion 331 and then the anode via 341 is opened, so that the conductive portion 35 avoids the cathode connecting layer 33 and is insulated from the cathode connecting layer 33, thereby preventing the problem of short circuit between the anode signal and the cathode signal.

[0041] The anode connection layer 36 is disposed on the first insulating base layer 34, 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, thereby realizing 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 the upper layer involved in the present application refers to the sub-pixel closer to the array substrate 10 of the two sub-pixels stacked in the pixel opening 31 as the sub-pixel located in the lower layer, and the other sub-pixel stacked on the sub-pixel in the lower layer is the sub-pixel located in the upper layer.

[0042] 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 covered on the second insulating base layer 37 and extends beyond the second insulating base layer 37 in a direction parallel to the plane of the array substrate 10, so that the portion extending beyond the second insulating base layer 37 is suspended to form a suspended structure, that is, the top structure 38 and the second insulating base layer 37 form a "T"-shaped structure. Specifically, the second insulating base does not extend beyond the anode connection layer 36 on the side close to the pixel opening 31, so as to facilitate 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 prepared separately in different processes, or can also be prepared and formed in the same process, for example, SiO2 / SiN can be used respectively. x / SiNO material, different materials can be used at different rates to achieve a "T" shape. 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 presence of the overhanging structure, each light-emitting layer, the cathode electrode 44 and the second anode 45 can be deposited in a fault 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 monochrome light-emitting layer and the cathode electrode 44 to form an etching protection layer, and then the organic light-emitting layers and cathode electrodes 44 and the second anode 45 of other colors are prepared one by one. That is, due to the presence of the overhanging structure, it can be used to replace the fine metal mask (FMM) to directly prepare each organic light-emitting layer, that is, each sub-pixel can be prepared without FMM.

[0043] 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. In 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 in 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 and extend the life of the first sub-pixel P1; moreover, the first sub-pixel P1 does not need to occupy the pixel opening 31 separately, and can also effectively improve the pixel density, thereby further improving the display effect.

[0044] Please refer to Figure 2 and Figure 3 , Figure 3 yes Figure 2 A schematic diagram of a planar structure of an embodiment of each electrode in the embodiment. In this embodiment, the auxiliary anode 22 is located between adjacent first anodes 21; in the same pixel unit P, the first anodes 21 of two first sub-pixels P1 are connected to each other through a connecting portion 23, and the connecting portion 23 is located in the first electrode layer 20, extends along the isolation structure 30 and avoids the auxiliary anode 22.

[0045] Specifically, the auxiliary anodes 22 are dispersedly arranged between the first anodes 21. For the same pixel unit P, the first anodes 21 of the two first sub-pixels P1 are interconnected through the connecting portion 23, and the connecting portion 23 is in the same layer as the first anode 21 and is formed by the same patterning process. It can be understood that in the same pixel unit P, the two first anodes 21 are an integrated electrode structure so that the two sub-pixels receive the same driving signal, so that the light-emitting effects of the two first light-emitting layers 41 are more balanced, so as to improve the display effect. Among them, the connecting portion 23 is below the isolation structure 30, extends along the extension direction of the isolation structure 30 and avoids the auxiliary anode 22 to avoid short circuit with the auxiliary anode 22.

[0046] Please refer to Figure 2 and Figure 4 , Figure 4 yes Figure 2 A schematic diagram of the planar structure of another embodiment of each electrode in the embodiment. In this embodiment, in the same pixel unit P, the first anodes 21 of the two first sub-pixels P1 are independent of each other, and the two first anodes 21 are connected to the same driving signal. That is, in this embodiment, for the same pixel unit P, the two first anodes 21 in the pixel unit P are independent of each other, and no connecting portion 23 is provided to connect the two first anodes 21, which can make the pattern of the first electrode layer 20 simpler and easier to prepare, and make the insulation between the first electrode and the auxiliary anode 22 better. It is also beneficial to the setting of the auxiliary anode 22, and the restrictions on the setting position of the auxiliary anode 22 are reduced, which is more conducive to the signal connection of the second anode 45.

[0047] Furthermore, 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, so that the light output of the two first light-emitting layers 41 is more balanced to improve the display effect.

[0048] Alternatively, in some embodiments, the two first anodes 21 may be connected to different drive signals, that is, connected to different pixel drive circuits, so that the two sub-pixels can be driven independently. For example, when the brightness required by the first sub-pixel P1 is low, only one of the first sub-pixels P1 may be driven to emit light, and the other may not emit light, thereby further improving the life of the first sub-pixel P1.

[0049] See also Figure 5 and Figure 6 , Figure 5 is a schematic diagram of a longitudinal cross-sectional structure of a display panel provided in the third embodiment of the present application, Figure 6 yes Figure 5 A schematic diagram of a planar structure of an embodiment of each electrode in FIG. Figure 2The same as in the embodiment, the first sub-pixel P1 is located at the lower layer in the pixel opening 31, and the second sub-pixel P2 and the third sub-pixel P3 are located at the upper layer in the pixel opening 31. Figure 2 The difference in the embodiment is that 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 .

[0050] In the present 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 the anode connection layer 36 and the anode via 341 do not need to be provided in the isolation structure 30 on the side where the two pixel openings 31 are close to each other, so 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 the 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 motor layer can be further simplified.

[0051] See also Figure 7 , Figure 7 : is a schematic diagram of the longitudinal cross-sectional structure of the 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 arranged between the first anode 21 and the cathode electrode 44, and the first light-emitting layer 41 is arranged between the cathode electrode 44 and the second anode 45. Among them, in 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, and 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 in 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 of their respective pixel openings 31, and the two first sub-pixels P1 are located in the upper layer of their respective pixel openings 31.

[0052] Further, in each pixel unit P, the auxiliary anode 22 is located between the two first anodes 21, and the second anodes 45 of the two first sub-pixels P1 are both in contact and electrically connected 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 the two second anodes 45 are close to each other, and the two second anodes 45 are both in contact and electrically connected 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 portion 35. It can be understood that in each pixel unit P, the two first sub-pixels P1 share the anode connection layer 36, the conductive portion 35 and the auxiliary anode 22. This arrangement can effectively reduce the number of anode connection layers 36, conductive portions 35 and auxiliary anodes 22, thereby simplifying the process and making it easy to manufacture. Moreover, it can further improve the stability of the drive signal transmission and improve the yield of the display panel 100.

[0053] Furthermore, in the embodiment of the present application, the display panel 100 further includes an encapsulation layer 50, which covers each sub-pixel and the isolation structure 30 and fills each pixel opening 31 to encapsulate the sub-pixel to prevent the organic light-emitting layer from failing due to the intrusion of external water and oxygen. Specifically, the overall encapsulation can be performed by a stacking method of an inorganic insulating layer + an organic insulating layer + an inorganic insulating layer.

[0054] Please refer to Figure 4 and Figure 8 , Figure 8 yes Figure 7 A schematic diagram of a planar structure of an embodiment of each electrode in the embodiment of the present application is provided. In the specific embodiment of the present application, at least one anode via 341 is provided between each anode connection layer 36 and the corresponding auxiliary anode 22 to improve the reliability of signal connection.

[0055] like Figure 4 As shown, in this embodiment, an anode via 341 is provided between each anode connection layer 36 and the corresponding auxiliary anode 22, so as 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 the signal connection. Furthermore, the hole type of the anode via 341 can be a tapered hole or a stepped hole, which is conducive to the conductive part 35 filling the anode via 341, further improving the reliability of the signal connection.

[0056] like 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 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; similarly, the hole shape of the anode via 341 can also be a tapered hole or a stepped hole, which is conducive to the conductive part 35 filling the anode via 341, further improving the reliability of signal connection.

[0057] 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 can be relatively smaller, so that the lifespan of the two sub-pixels is closer, the luminous efficiency is closer, and the lifespan and display effect of the display panel 100 are further improved.

[0058] See also Fig. 9 , Fig. 9 1 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. In this embodiment, a display device is provided, and a display device is provided, which can be used in display fields such as tablets, mobile phones, vehicles, VR glasses, and lighting equipment.

[0059] The display device includes a display panel 100 and a control circuit board 200. The control circuit board 200 is electrically connected to the display panel 100, and is used to provide the display panel 100 with various drive signals, power signals and other drive signals required by the display panel 100, so as to control the display panel 100 to display corresponding images. The specific structure and function of the display panel 100 are the same or similar to the specific structure and function of the display panel 100 in the above embodiment, and the same technical effect can be achieved, and the specific reference can be made to the above related introduction.

[0060] 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, 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; Among them, the isolation structure is also provided with a cathode connection layer and an anode connection layer, the first electrode layer also 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.

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, a first insulating base layer, a 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 arranged between the pixel definition layer and the first insulating base layer, and the anode connection layer is arranged between the first insulating base layer and the second insulating base layer; wherein the first insulating base layer is also filled in the hollow portion, and the first insulating base layer has an anode via hole penetrating the hollow portion and the pixel definition layer, and the conductive portion is arranged in the anode via hole.

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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