OLED display panel and display device

Abstract

The embodiment of the utility model provides an OLED (Organic Light Emitting Diode) display panel and a display device, relates to the technical field of display, and aims to solve the problem of voltage drop rise caused by relatively high resistance of a cathode layer in related technologies. The display panel comprises an array substrate, a pixel definition layer and a light emitting device layer. The pixel definition layer is arranged on the array substrate, and the pixel definition layer is provided with a plurality of first openings; the light-emitting device layer is arranged on the array substrate, and the light-emitting device layer comprises a plurality of light-emitting devices arranged in an array and an auxiliary cathode layer. Each light-emitting device is at least partially located in one first opening; each light-emitting device comprises an anode, a light-emitting material layer and a cathode which are sequentially arranged in a stacked mode in the direction away from the array substrate, and the cathodes of the light-emitting devices are connected with one another and form a cathode layer. The auxiliary cathode layer is arranged on the side, away from the array substrate, of the pixel defining layer and comprises at least one auxiliary cathode, and the auxiliary cathodes make contact with the cathode layer and are electrically connected with the cathode layer.

Description

Technical Field

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

[0002] OLED (organic light-emitting diode) display devices have the advantages of active light emission, fast response, wide viewing angle, high brightness, color saturation, thinness, flexibility and low cost, and are therefore increasingly favored by the market. According to the light emission direction, OLED display panels can be divided into bottom emission display panels and top emission display panels. Among them, for top emission display panels, since the light emission direction is on the cathode layer side, the design of the cathode layer has a crucial impact on the display performance.

[0003] In the related art, the cathode layer in the top-emitting OLED display panel has a relatively thin thickness, and therefore, the resistance of the cathode layer is relatively large, which easily leads to problems of increased voltage drop and increased power consumption. Utility Model Content

[0004] The embodiments of the present application provide an OLED display panel and a display device to solve the problem in the related art that the cathode layer resistance is large and thus leads to increased voltage drop.

[0005] The embodiment of the present application provides an array substrate, comprising: an array substrate, a pixel definition layer and a light-emitting device layer. The pixel definition layer is arranged on the array substrate, and the pixel definition layer has a plurality of first openings; the light-emitting device layer is arranged on the array substrate, and the light-emitting device layer comprises: a plurality of light-emitting devices arranged in an array and an auxiliary cathode layer. Each light-emitting device is at least partially located in a first opening; each light-emitting device comprises an anode, a light-emitting material layer and a cathode which are sequentially stacked in a direction away from the array substrate, and the cathodes of the plurality of light-emitting devices are interconnected and constitute a cathode layer; the auxiliary cathode layer is arranged on a side of the pixel definition layer away from the array substrate, and the auxiliary cathode layer comprises at least one auxiliary cathode, and the auxiliary cathode is in contact with and electrically connected to the cathode layer.

[0006] In some embodiments, the light-emitting material layers of the plurality of light-emitting devices together constitute a light-emitting functional layer, the light-emitting functional layer is disconnected on the pixel definition layer and forms a second opening, and the second opening exposes a portion of the auxiliary cathode.

[0007] In some embodiments, the light-emitting material layers of the plurality of light-emitting devices together constitute a light-emitting functional layer, the light-emitting functional layer is disconnected on the pixel definition layer and forms a second opening corresponding to the auxiliary cathode, and the auxiliary cathode is located in the second opening.

[0008] In some embodiments, an auxiliary cathode is disposed at least partially around a first opening.

[0009] In some embodiments, the auxiliary cathode layer includes a plurality of auxiliary cathodes, and the plurality of auxiliary cathodes correspond one-to-one to the plurality of light emitting devices.

[0010] In some embodiments, the auxiliary cathode layer further includes an auxiliary signal line, and the auxiliary signal line is electrically connected to the plurality of auxiliary cathodes.

[0011] In some embodiments, each light emitting device further includes an auxiliary electrode portion located between the light emitting material layer and the cathode and electrically connected to the cathode, and the auxiliary electrode portions of two adjacent light emitting devices are insulated and spaced apart.

[0012] In some embodiments, the array substrate includes: a substrate and a driving circuit layer, the driving circuit layer is located between the substrate and the light-emitting device layer, and the driving circuit layer includes a pixel driving circuit connected to an anode of each light-emitting device.

[0013] In some embodiments, the OLED display panel further includes an encapsulation layer, and the encapsulation layer is disposed on a side of the cathode layer away from the array substrate.

[0014] An embodiment of the present application further provides a display panel, which includes the array substrate described in any of the above embodiments.

[0015] For the OLED display panel provided in the embodiment of the present application, since the display panel is provided with an auxiliary cathode, and the auxiliary cathode is connected in parallel with the cathode layer, the resistance of the cathode layer can be effectively reduced, thereby reducing the voltage drop of the cathode layer and reducing the power consumption of the OLED display panel. In addition, since the auxiliary cathode and the cathode layer are connected in parallel, the voltages of different regions of the cathode layer can be made consistent, thereby improving the display uniformity of the OLED display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a cross-sectional structural diagram of an OLED display panel provided in some embodiments of the present application;

[0018] Figure 2 is a schematic diagram of the structure of a light-emitting device provided in some embodiments of the present application;

[0019] Figure 3 is a cross-sectional structural diagram of another OLED display panel provided in some embodiments of the present application;

[0020] Figure 4A is a schematic top view of an OLED display panel provided in some embodiments of the present application;

[0021] Figure 4B is a schematic top view of another OLED display panel provided in some embodiments of the present application;

[0022] Figure 5 is a top view schematic diagram of another OLED display panel provided in some embodiments of the present application;

[0023] Figure 6 is a cross-sectional structural diagram of another OLED display panel provided in some embodiments of the present application;

[0024] Figure 7 It is a cross-sectional structural diagram of a display device provided in some embodiments of the present application.

[0025] Description of main component symbols:

[0026] 10. substrate; 11. array substrate; 20. drive circuit layer; 21. pixel definition layer; 31. light-emitting device layer; 32. light-emitting device; 33. auxiliary cathode layer; 100. OLED display panel; 200. display device; 321. anode; 322. light-emitting material layer; 323. cathode; 324. auxiliary electrode portion; 331. auxiliary cathode; 332. auxiliary signal line; 3221. light-emitting layer; 3222. first functional material layer; 3223. second functional material layer; K1. first opening; K2. second opening. DETAILED DESCRIPTION

[0027] 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 those skilled in the art without creative work are within the scope of protection of this application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0030] The use of "suitable for" or "configured to" in this application is meant to be open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps. In addition, the use of "based on" is meant to be open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values ​​can be based on additional conditions or values ​​beyond the stated values ​​in practice.

[0031] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0032] For top-emitting OLED display panels, the cathode layer needs to have good light transmittance and conductivity at the same time, so as to ensure that the display panel has good display performance. In the related art, the cathode layer in the top-emitting OLED display panel has a relatively thin thickness, so that the resistance of the cathode layer is relatively large, which easily leads to the problem of increased voltage drop and increased power consumption, and also causes uneven voltage distribution at various locations on the cathode layer, resulting in uneven display brightness of the display panel.

[0033] Based on this, the present disclosure provides an OLED display panel. Figure 1 As shown, the OLED display panel 100 includes an array substrate 11 , a pixel definition layer 21 and a light emitting device layer 31 .

[0034] The pixel definition layer 21 is disposed on the array substrate 11 , and the pixel definition layer 21 has a plurality of first openings K1 .

[0035] The light emitting device layer 31 includes: a plurality of light emitting devices 32 arranged in an array and an auxiliary cathode layer 33 .

[0036] Each light emitting device 32 is at least partially located in one first opening K1. For example, the light emitting device 32 may be completely located in the corresponding first opening K1; or, the light emitting device 32 may be only partially located in the corresponding first opening K1.

[0037] Each light emitting device 32 includes an anode 321, a light emitting material layer 322, and a cathode 323 which are sequentially stacked in a direction away from the array substrate 11. The anode 321 can be manufactured before the pixel definition layer 21, so that the anode 321 and the pixel definition layer 21 can define the first opening K1 together, and the light emitting material layer 322 can be partially located in the first opening K1, and the cathode 323 can also be partially located in the first opening K1.

[0038] The cathodes 323 of the plurality of light emitting devices 32 are connected to each other and form a cathode layer. That is, the cathodes 323 of all the light emitting devices 32 are connected to each other and form an integrated structure, and the cathodes 323 of all the light emitting devices 32 can be integrally formed through a single manufacturing process.

[0039] The auxiliary cathode layer 33 is disposed on a side of the pixel definition layer 21 away from the array substrate 11 . The auxiliary cathode layer 33 includes at least one auxiliary cathode 331 . The auxiliary cathode 331 is in contact with and electrically connected to the cathode layer.

[0040] In this arrangement, since the auxiliary cathode 331 and the cathode layer are located at different layers and are electrically connected, that is, they are connected in parallel, the resistance of the cathode layer can be effectively reduced, thereby reducing the voltage drop of the cathode layer and reducing the power consumption of the OLED display panel 100. In addition, since the auxiliary cathode 331 and the cathode layer are connected in parallel, the voltages of different regions of the cathode layer can be made consistent, thereby improving the display uniformity of the OLED display panel 100.

[0041] In some examples, the array substrate 11 may include a substrate 10, which may be a flexible substrate or a rigid substrate. When the substrate 10 is a flexible substrate, the material of the substrate 10 may be a PI (Polyimide) material. When the substrate 10 is a rigid substrate, the substrate 10 may be glass.

[0042] In some examples, the array substrate 11 further includes a driving circuit layer 20 located between the substrate 10 and the light-emitting device layer 31, and the driving circuit layer 20 includes a pixel driving circuit connected to the anode 321 of each light-emitting device 32. The pixel driving circuit is used to drive the corresponding light-emitting device 32 to emit light, thereby realizing the display of the OLED display panel 100.

[0043] In some embodiments, the OLED display panel 100 can be a top-emitting display panel (light emitted by the light-emitting device 32 is emitted from the side away from the substrate 10) or a double-sided emission display panel (light emitted by the light-emitting device 32 is emitted from one side of the substrate 10 and the side away from the substrate 10).

[0044] In this case, the cathode layer may be a transparent conductive oxide film. For example, the cathode layer may be made of at least one material selected from graphene, ITO (indium tin oxide), IZO (indium zinc oxide), and FTO (fluorine-doped tin oxide). In this way, the light emitted by the light-emitting device layer 31 may be emitted from one side of the cathode layer, thereby realizing the display of the OLED display panel 100.

[0045] In some examples, the material of the auxiliary cathode layer 33 may be consistent with the material of the cathode layer.

[0046] When voltages are applied to the anode 321 and the cathode 323, the light-emitting material layer 322 emits light. Since the cathode 323 is connected to the auxiliary cathode 331, the resistance of the cathode layer can be reduced, thereby reducing the voltage drop of the cathode layer, reducing the power consumption of the OLED display panel 100, and improving the display uniformity of the OLED display panel 100.

[0047] In some embodiments, Figure 2 As shown, the light-emitting material layer 322 includes a light-emitting layer 3221 .

[0048] In some examples, the light emitting material layer 322 may further include a first functional material layer 3222 located between the light emitting layer 3221 and the anode 321 (eg, an anode).

[0049] Illustratively, the first functional material layer 3222 may include a hole injection layer and a hole transport layer, and may further include an electron blocking layer, which is not specifically limited here, as long as the first functional material layer 3222 can achieve hole injection and transport.

[0050] In some examples, the light emitting material layer 322 may further include a second functional material layer 3223 located between the light emitting layer 3221 and the cathode 323 (eg, a cathode).

[0051] Illustratively, the second functional material layer 3223 may include an electron injection layer and an electron transport layer, and may further include a hole blocking layer, which is not specifically limited herein, as long as the second functional material layer 3223 can achieve the injection and transport of electrons.

[0052] The OLED display panel 100 can emit monochromatic light (light of a single color) or light with adjustable color, etc.

[0053] Exemplarily, the OLED display panel 100 can emit monochromatic light. In this example, the multiple light-emitting devices (for example, all light-emitting devices) included in the OLED display panel 100 all emit monochromatic light (such as red light). The OLED display panel 100 can be used for lighting, that is, it can be applied to a lighting device, and can also be used to display a single-color image or picture, that is, it can be applied to a display device.

[0054] As another example, the OLED display panel 100 can emit color-adjustable light (i.e., colored light). In this example, the OLED display panel 100 includes multiple light-emitting devices with different light-emitting colors. By controlling the brightness of each light-emitting device, the color and brightness of the mixed light emitted by the OLED display panel 100 can be controlled, and colored light emission can be achieved. The OLED display panel 100 can be used to display images or pictures, that is, it can be applied to a display device. Of course, the OLED display panel 100 can also be used in a lighting device.

[0055] In some embodiments, Figure 1 As shown, the light-emitting material layers 322 of the plurality of light-emitting devices 32 together form a light-emitting functional layer, and the auxiliary cathode layer 33 is located between the pixel definition layer 21 and the light-emitting functional layer. That is, the auxiliary cathode layer 33 is manufactured before the light-emitting functional layer.

[0056] In some examples, such as Figure 1 As shown, the light-emitting functional layer is disconnected on the pixel definition layer 21 to form a second opening K2 corresponding to the auxiliary cathode 331 , and the second opening K2 exposes a portion of the auxiliary cathode 331 .

[0057] With this arrangement, the thickness of the auxiliary cathode layer 33 can be flexibly controlled according to actual needs without being affected by the thickness of the light-emitting functional layer, so that an auxiliary cathode layer 33 that meets the needs can be designed and produced based on test data, which is beneficial for controlling the production cost of the OLED display panel 100.

[0058] Exemplarily, the orthographic projection of the auxiliary cathode layer 33 on the array substrate 11 overlaps with the orthographic projection of the light-emitting functional layer on the array substrate 11. In this way, the light-emitting functional layer can partially cover the auxiliary cathode layer 33, and the uncovered portion of the auxiliary cathode layer 33 can be directly connected to the cathode layer formed subsequently.

[0059] like Figure 1 As shown, the auxiliary cathode layer 33 is located above the pixel definition layer 21 , so as to avoid contact and electrical connection between the auxiliary cathode layer 33 and the anode 321 of the light emitting device 32 , thereby preventing the display of the OLED display panel 100 from being affected.

[0060] In other embodiments, Figure 3 As shown, the light-emitting functional layer is disconnected on the pixel definition layer 21 and forms a second opening K2 corresponding to the auxiliary cathode 331, and the auxiliary cathode 331 is located in the second opening K2. In this case, the auxiliary cathode 331 is completely exposed to the second opening K2.

[0061] With this arrangement, the light-emitting functional layer is manufactured before the auxiliary cathode layer 33 (from the manufacturing process of the light-emitting device 31, the light-emitting material layer 322 is manufactured before the auxiliary cathode 331). In this way, the auxiliary cathode layer 33 can be directly manufactured in the second opening K2, which helps to improve the manufacturing efficiency of the OLED display panel 100.

[0062] In some embodiments, one auxiliary cathode 331 may be disposed at one side of one first opening K1 .

[0063] In other embodiments, Figure 4A and Figure 4B As shown, an auxiliary cathode 331 is at least partially arranged around a first opening K1. This arrangement is conducive to increasing the connection area between the auxiliary cathode 331 and the cathode 323 of the light emitting device 32 corresponding to the first opening K1, thereby improving the connection stability between the auxiliary cathode 331 and the cathode 323.

[0064] For example, Figure 4AAs shown, the auxiliary cathode 331 may partially surround the first opening K1. Figure 4B As shown, the auxiliary cathode 331 may completely surround the first opening K1 , that is, the inner circle of the auxiliary cathode 331 completely surrounds the first opening K1 .

[0065] In some embodiments, Figure 5 As shown, the auxiliary cathode layer 33 includes a plurality of auxiliary cathodes 331, and the plurality of auxiliary cathodes 331 correspond one to one with the plurality of light emitting devices 32. This is conducive to making the voltages of the cathodes 323 in the cathode layer tend to be consistent, thereby ensuring the display uniformity of the OLED display panel 100.

[0066] In some embodiments, Figure 5 As shown, the auxiliary cathode layer 33 further includes an auxiliary signal line 332, and the auxiliary signal line 332 is electrically connected to a plurality of auxiliary cathodes 331 (i.e., all auxiliary cathodes 331). In this way, the auxiliary signal line 332 can be used to apply an auxiliary voltage to the plurality of auxiliary cathodes 331, so that the voltage of each auxiliary cathode 331 can be relatively more uniform, which is beneficial to improving the display quality of the OLED display panel 100.

[0067] Exemplarily, the auxiliary voltage is consistent with the voltage applied to the cathode layer, which can ensure the display stability of the OLED display panel 100 .

[0068] In some examples, a plurality of auxiliary cathodes 331 in the auxiliary cathode layer 33 may be connected to each other and then connected to the auxiliary signal line 332 , which may reduce the wiring arrangement in the auxiliary cathode layer 33 .

[0069] In some examples, the auxiliary signal line 332 may be arranged in a non-display area of ​​the OLED display panel 100 to avoid affecting the display of the display panel.

[0070] In some embodiments, Figure 6 As shown, each light emitting device 32 further includes an auxiliary electrode portion 324 located between the light emitting material layer 322 and the cathode 323, and the auxiliary electrode portion 324 is electrically connected to the cathode 323 of the light emitting device 32. The auxiliary electrode portions 324 of two adjacent light emitting devices 32 are insulated and spaced apart. That is, the auxiliary electrode portions 324 of two adjacent light emitting devices 32 are disconnected from each other.

[0071] In this way, the auxiliary electrode portion 324 is connected in parallel with the cathode 323 of the light emitting device 32, so that the resistance at the cathode 323 position can be reduced, thereby reducing the power consumption of the OLED display panel 100 and improving the display uniformity of the OLED display panel 100. In addition, the auxiliary electrode portion 324 and the cathode 323 can be manufactured in layers, so that the thickness of the auxiliary electrode portion 324 and the cathode layer can be controlled separately, which is conducive to effectively controlling the thickness of the connection portion between the cathode layer and the auxiliary cathode layer 33.

[0072] Exemplarily, the light-emitting functional layer and the layers corresponding to the auxiliary electrode portion 324 can be sequentially produced above the pixel definition layer 21, and then the auxiliary cathode 331 of the auxiliary cathode layer 33 is partially exposed through an etching process, and then the cathode layer formed by the cathode 323 is deposited or evaporated, so that the auxiliary cathode 331 and the cathode layer are electrically connected.

[0073] In some embodiments, the opening size of the first opening K1 gradually increases along the direction in which the pixel definition layer 21 moves away from the array substrate 11 , so that the side wall of the pixel definition layer 21 close to the first opening K1 is a sloped surface, which is conducive to more accurately defining the light-emitting area of ​​the light-emitting device 32 .

[0074] In some embodiments, the OLED display panel 100 further includes an encapsulation layer, which is disposed on a side of the cathode layer away from the array substrate 11. The encapsulation layer can encapsulate the OLED display panel 100 to prevent external water, oxygen, etc. from invading the interior of the OLED display panel 100, thereby protecting components (such as the light-emitting device 32) inside the OLED display panel 100.

[0075] For example, the encapsulation layer may include a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer that are stacked in sequence. The materials of the first encapsulation layer and the third encapsulation layer may include inorganic materials, such as silicon nitride, silicon oxide, silicon oxynitride, etc. The inorganic materials have high density and can prevent the intrusion of water, oxygen, etc. For example, the first encapsulation layer and the third encapsulation layer may be formed by processes such as chemical vapor deposition. For example, the material of the second encapsulation layer may include organic materials, such as polymer materials containing desiccant or polymer materials that can block water vapor, such as polymer resins, etc. For example, the second encapsulation layer may be formed by processes such as inkjet printing.

[0076] like Figure 7As shown, some embodiments of the present disclosure further provide a display device 200, including the OLED display panel 100 described in any of the above embodiments. Of course, other components may also be included, for example, a circuit for providing an electrical signal to the OLED display panel 100 to drive the OLED display panel 100 to emit light, which may be called a control circuit and may include a circuit board and / or an IC (Integrate Circuit) electrically connected to a substrate.

[0077] In some embodiments, the display device 200 can be used as a light source to achieve a lighting function. For example, the display panel can be a backlight module in a liquid crystal display device, a lamp for internal or external lighting, or various signal lights.

[0078] In other embodiments, the display device 200 can be used to realize the function of displaying an image (i.e., a picture). The display device may include a display or a product including a display. Among them, the display may be a flat panel display (Flat Panel Display, FPD), a micro display, etc. If divided according to whether the user can see the back of the display, the display may be a transparent display or an opaque display. If divided according to whether the display can be bent or curled, the display may be a flexible display or an ordinary display (which may be called a rigid display). For example, products including displays may include: computer monitors, televisions, billboards, laser printers with display functions, telephones, mobile phones, personal digital assistants (Personal Digital Assistant, PDA), laptop computers, digital cameras, camcorders, viewfinders, vehicles, large-area walls, theater screens or stadium signs, etc.

[0079] The utility model names provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An OLED display panel, characterized in that: include: An array substrate; A pixel definition layer, disposed on the array substrate, wherein the pixel definition layer has a plurality of first openings; as well as A light emitting device layer is disposed on the array substrate, and the light emitting device layer includes: A plurality of light-emitting devices arranged in an array, each of which is at least partially located in a first opening; each of which comprises an anode, a light-emitting material layer and a cathode which are sequentially stacked in a direction away from the array substrate, and the cathodes of the plurality of light-emitting devices are connected to each other and form a cathode layer; and The auxiliary cathode layer is arranged on a side of the pixel definition layer away from the array substrate, and the auxiliary cathode layer includes at least one auxiliary cathode, and the auxiliary cathode is in contact with and electrically connected to the cathode layer.

2. The OLED display panel according to claim 1, characterized in that: The light-emitting material layers of the plurality of light-emitting devices together constitute a light-emitting functional layer, the light-emitting functional layer is disconnected on the pixel definition layer and forms a second opening corresponding to the auxiliary cathode, and the second opening exposes a portion of the auxiliary cathode.

3. The OLED display panel according to claim 1, characterized in that: The light-emitting material layers of the plurality of light-emitting devices together constitute a light-emitting functional layer, the light-emitting functional layer is disconnected on the pixel definition layer and forms a second opening corresponding to the auxiliary cathode, and the auxiliary cathode is located in the second opening.

4. The OLED display panel according to any one of claims 1 to 3, characterized in that: An auxiliary cathode is disposed at least partially around a first opening.

5. The OLED display panel according to claim 4, characterized in that: The auxiliary cathode layer includes a plurality of auxiliary cathodes, and the plurality of auxiliary cathodes correspond to the plurality of light emitting devices one by one.

6. The OLED display panel according to claim 5, characterized in that: The auxiliary cathode layer further includes an auxiliary signal line, and the auxiliary signal line is electrically connected to the plurality of auxiliary cathodes.

7. The OLED display panel according to any one of claims 1 to 3, characterized in that: Each light emitting device further includes an auxiliary electrode portion located between the light emitting material layer and the cathode and electrically connected to the cathode. The auxiliary electrode portions of two adjacent light emitting devices are insulated and spaced apart.

8. The OLED display panel according to any one of claims 1 to 3, characterized in that: The array substrate comprises: a substrate and a driving circuit layer, wherein the driving circuit layer is located between the substrate and the light emitting device layer, and the driving circuit layer comprises a pixel driving circuit connected to an anode of each light emitting device.

9. The OLED display panel according to any one of claims 1 to 3, characterized in that: It also includes a packaging layer, which is arranged on a side of the cathode layer away from the array substrate.

10. A display device, characterized in that: Comprising the OLED display panel as described in any one of claims 1-9.

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