Display panel and display device

Abstract

This application provides a display panel and a display device, relating to the field of display technology. The display panel includes: a substrate; a pixel defining layer located on one side of the substrate, the pixel defining layer forming a plurality of pixel openings; an anode layer located within the pixel openings and spaced apart from the sidewalls of the pixel openings, wherein the anode layer includes a first conductive layer, a metal layer, and a second conductive layer sequentially stacked along the thickness direction of the substrate, the first conductive layer being in contact with the substrate; and a barrier layer located within the pixel openings and in contact with the sidewalls of the anode layer, wherein the barrier layer is located on the sidewall of the metal layer. This can suppress leakage current in the anode layer, avoid crosstalk in the displayed image, improve the brightness uniformity of the displayed image, reduce the risk of brown rings on the display panel, and improve the display performance of the display panel.

Description

Technical Field

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

[0002] With the rapid development of display technology, the requirements for the display effect of display panels are gradually increasing. In traditional display panel manufacturing technology, a solution method is usually used to print or print pixels, and a groove is formed between the anode layer and the pixel boundary layer. This creates an interval between the anode layer and the pixel boundary layer. The pixel particles on the surface of the anode layer emit light, while the pixel particles in the groove do not emit light. This can improve the uniformity of pixel distribution within the display pixels and improve the display effect of the display panel.

[0003] However, for anode layers with metallic materials, the ionization of metal ions can cause leakage in the anode layer, which can cause the pixel particles in the groove to light up, resulting in crosstalk in the display image. This reduces the uniformity of brightness in the display image, increases the risk of the coffee ring on the display panel, and affects the display performance of the display panel. Summary of the Invention

[0004] Based on this, embodiments of this application provide a display panel and a display device that can suppress leakage in the anode layer, avoid crosstalk in the display screen, improve the brightness uniformity of the display screen, reduce the risk of brown rings on the display panel, and improve the display performance of the display panel.

[0005] A first aspect of this application provides a display panel, including:

[0006] Substrate;

[0007] A pixel defining layer is located on one side of the substrate, and the pixel defining layer surrounds and forms a plurality of pixel openings;

[0008] An anode layer is located inside the pixel opening and is spaced apart from the sidewall of the pixel opening. The anode layer includes a first conductive layer, a metal layer, and a second conductive layer stacked sequentially along the thickness direction of the substrate. The first conductive layer is in contact with the substrate.

[0009] A barrier layer is located within the pixel opening and is disposed in contact with the sidewall of the anode layer, wherein the barrier layer is at least partially located on the sidewall of the metal layer.

[0010] In some implementations...

[0011] The blocking layer is spaced apart from the sidewall of the pixel opening;

[0012] Optionally, the barrier layer covers all sidewalls of the metal layer.

[0013] In some embodiments, the barrier layer is spaced apart from the substrate.

[0014] In some embodiments, the barrier layer is in contact with the substrate;

[0015] The barrier layer is in contact with at least a portion of the sidewall of the first conductive layer;

[0016] Optionally, the barrier layer is in contact with at least a portion of the sidewall of the second conductive layer;

[0017] Optionally, along a direction perpendicular to the substrate, the thickness of the barrier layer is greater than or equal to the sum of the thicknesses of the first conductive layer and the metal layer;

[0018] Optionally, the thickness of the barrier layer is smaller than the thickness of the anode layer along the thickness direction perpendicular to the substrate.

[0019] In some embodiments, the substrate, the sidewall of the anode layer, and the sidewall of the pixel opening together form a first groove;

[0020] In a direction parallel to the substrate, the size of the orthographic projection of the first groove onto the substrate is a first size, and the size of the orthographic projection of the barrier layer onto the substrate is a second size;

[0021] Wherein, the first dimension is larger than the second dimension;

[0022] Optionally, the ratio of the second dimension to the first dimension ranges from 20% to 50%.

[0023] In some implementations, the ratio of the second dimension to the first dimension ranges from 20% to 35%.

[0024] In some embodiments, the substrate, the sidewall of the anode layer, and the sidewall of the pixel opening together form a first groove;

[0025] In a direction parallel to the substrate, the size of the orthographic projection of the first groove onto the substrate is a first size, and the size of the orthographic projection of the pixel opening onto the substrate is a third size;

[0026] The ratio of the first dimension to the third dimension ranges from 5% to 20%.

[0027] In some implementations, the ratio of the first dimension to the third dimension ranges from 5% to 10%.

[0028] In some embodiments, the orthographic projection of the surface of the barrier layer on the substrate away from the substrate falls inside the edge of the orthographic projection of the surface of the barrier layer on the substrate near the substrate.

[0029] Optionally, the surface of the barrier layer on the side away from the substrate includes at least one of a stepped surface and an arcuate surface;

[0030] Optionally, the material of the barrier layer includes inorganic insulating materials;

[0031] Optionally, the materials of the first conductive layer and the second conductive layer include indium tin oxide;

[0032] Optionally, the material of the metal layer includes silver;

[0033] Optionally, the display panel further includes:

[0034] A light-emitting functional layer is located on the side of the anode layer away from the substrate, wherein the light-emitting functional layer is formed by a solution method;

[0035] The cathode layer is located on the side of the light-emitting functional layer away from the substrate.

[0036] A second aspect of this application provides a display device, comprising: a display panel as described in any of the first aspects above.

[0037] This application provides a display panel and display device. An anode layer is disposed within a pixel opening of a pixel defining layer, with the anode layer and the sidewall of the pixel opening spaced apart. A barrier layer is disposed on the sidewall of the metal layer of the anode layer. A first groove can be formed between the anode layer and the sidewall of the pixel opening. This improves the uniformity of pixel particle distribution during solution-based pixel formation and further enhances the uniformity of pixel film formation on the surface of the anode layer away from the substrate, reducing the risk of pixel illumination from high-concentration solutions. Simultaneously, the barrier layer located on the sidewall of the metal layer blocks ion ionization, suppressing leakage current in the anode layer and preventing ionized ions from illuminating the pixel particles in the first groove. This improves the anode layer's control over the pixel, avoids crosstalk in the display image, and thus improves the brightness uniformity of the display image, reducing the risk of a "coffee ring" effect on the display panel and enhancing its display effect and performance. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of this application;

[0040] Figure 2 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0041] Figure 3 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0042] Figure 4 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0043] Figure 5 A schematic structural diagram of a display panel provided in an embodiment of this application;

[0044] Figure 6 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0045] Figure 7 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0046] Figure 8 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0047] Figure 9 A schematic structural diagram of a solution-based fabrication of a light-emitting functional layer for a display panel, provided in an embodiment of this application;

[0048] Figure 10 A schematic structural diagram of another solution-based fabrication of the light-emitting functional layer for a display panel provided in this application embodiment;

[0049] Figure 11 A schematic structural diagram of a solution-based fabrication of a light-emitting functional layer for a display panel, provided in an embodiment of this application;

[0050] Figure 12 This is a schematic structural diagram of a display device provided in an embodiment of this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100 - Substrate, 200 - Pixel defining layer, 300 - Anode layer, 310 - First conductive layer, 320 - Metal layer, 330 - Second conductive layer, 400 - Barrier layer, 500 - Light-emitting functional layer, 501 - Light-emitting area, 502 - First non-light-emitting area, 503 - Second non-light-emitting area, H1 - Thickness of the barrier layer in the direction perpendicular to the substrate, H2 - Sum of the thicknesses of the first conductive layer and the metal layer in the direction perpendicular to the substrate, L1 - First dimension, L2 - Second dimension. Detailed Implementation

[0053] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0054] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0055] In this document, spatial terms such as “upper” and “lower” are defined with reference to the accompanying drawings. Therefore, it will be understood that “upper” and “lower” are used interchangeably. It will be understood that when a layer is referred to as being “on” another layer, it can be formed directly on that other layer, or there may be intermediate layers. Therefore, it will be understood that when a layer is referred to as being “directly” on another layer, no intermediate layer is inserted in between.

[0056] In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It is understood that when a layer or element is referred to as "on" another layer or substrate, the layer or element may be directly on said other layer or substrate, or there may be intermediate layers. Furthermore, it is understood that when a layer is referred to as "between" two layers, the layer may be the only layer between said two layers, or there may be one or more intermediate layers. Additionally, the same reference numerals always denote the same elements.

[0057] In the following text, although terms such as “first” and “second” may be used to describe various components, these components are not necessarily limited to the terms above. The terms above are used only to distinguish one component from another. It will also be understood that expressions used in the singular form include plural expressions unless the singular form has a distinct meaning in the context. Furthermore, in the embodiments below, it will also be understood that the terms “comprising” and / or “having” as used herein indicate the presence of the stated feature or component, but do not exclude the presence or addition of one or more other features or components.

[0058] In the following embodiments, when a layer, region, or element is “connected,” it can be interpreted as the layer, region, or element being connected not only directly but also through other constituent elements placed therebetween. For example, when a layer, region, element, etc., is described as being connected or electrically connected, the layer, region, element, etc., can not only be directly connected or directly electrically connected, but can also be connected or electrically connected through another layer, region, element, etc., placed therebetween.

[0059] In the application documents, the term “and / or” includes any and all combinations of one or more of the related listed items. When a statement such as “at least one of…” follows a list of elements, it modifies the entire list of elements, rather than individual elements within that list.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] It should also be understood that the terms “including / comprise” or “have” specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0062] Electronic or electrical devices and / or any other related devices or components (e.g., display devices including a display panel and a display panel driver, wherein the display panel driver further includes a drive controller, a gate driver, a gamma reference voltage generator, a data driver, and a transmit driver) according to embodiments of the inventive concepts described herein can be implemented using any suitable hardware, firmware (e.g., application-specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, various components of these devices may be formed on an integrated circuit (IC) chip or on a separate IC chip. Additionally, various components of these devices may be implemented on a flexible printed circuit film, a tape-on-a-package (TCP), a printed circuit board (PCB), or formed on a substrate. Furthermore, various components of these devices may be processes or threads running on one or more processors in one or more computing devices to execute computer program instructions and interact with other system components to perform the various functions described herein. Computer program instructions are stored in memory, which may be implemented in a computing device using standard storage devices such as random access memory (RAM). Computer program instructions may also be stored in other non-transitory computer-readable media such as CD-ROMs, flash drives, etc. Furthermore, those skilled in the art will recognize that the functions of various computing devices may be combined or integrated into a single computing device, or the functions of a particular computing device may be distributed across one or more other computing devices, without departing from the spirit and scope of exemplary embodiments of the present invention.

[0063] While exemplary embodiments of the display module and the display device including the display module have been specifically described herein, many modifications and variations will be apparent to those skilled in the art. Therefore, it will be understood that the display module and the display device including the display module, constructed according to the principles of the invention, may be implemented in ways other than those specifically described herein. This application is also defined in the claims and their equivalents.

[0064] It should be noted that with the rapid development of display technology, the requirements for the display effect of display panels are gradually increasing. In traditional display panel manufacturing technology, solution methods are typically used to print or print pixels.

[0065] In the solution-based pixel fabrication process, the evaporation rate at the droplet edge is faster than that at the droplet center. Due to capillary action, pixel particles in the central region move towards the droplet edge, resulting in uneven thickness and pixel distribution in the fabricated pixels. This leads to poor color purity, a "coffee ring" effect, and negatively impacts the display quality. In contrast, the traditional solution-based pixel formation process typically involves creating a first groove K1 between the anode layer and the pixel demarcation layer. During solution evaporation, the edge regions with higher pixel concentration fall into the groove K1, while the more uniformly distributed central regions fall onto the anode layer surface. Furthermore, the pixel particles within the groove K1 cannot receive anode signals and therefore do not emit light, resulting in display pixels with a higher uniformity of anode layer surface that emit light.

[0066] However, for top-emitting display panels, a conductive metal layer is typically placed within the anode layer to improve light utilization and increase the light output of the display pixels. In traditional display panels, this metal layer is usually made of metal. With anode layers made of metal, the metal may generate ion ionization. When the display pixels are illuminated through the anode layer, these ionized metal ions become charged, causing leakage current in the anode layer. This allows the pixel particles within the recesses to light up, increasing the risk of the "coffee ring" effect on the display panel and causing crosstalk problems in the displayed image. Furthermore, the different pixel distribution within the recesses of different display pixels, and the different leakage current in the anode layers of different display pixels, further exacerbate the problem of inconsistent brightness among different display pixels within the display panel, thus affecting the display effect and the display performance of the panel.

[0067] like Figure 1 As shown, a first aspect of this application provides a display panel, including: a substrate 100, a pixel defining layer 200, an anode layer 300, and a barrier layer 400. The pixel defining layer 200 is located on one side of the substrate 100 and surrounds a plurality of pixel openings H; the anode layer 300 is located within the pixel openings H and is spaced apart from the sidewalls P of the pixel openings H. The anode layer 300 includes a first conductive layer 310, a metal layer 320, and a second conductive layer 330 sequentially stacked along the thickness direction of the substrate 100, the first conductive layer 310 being in contact with the substrate 100; the barrier layer 400 is located within the pixel openings H and is in contact with the sidewalls of the anode layer 300, the barrier layer 400 being at least partially located on the sidewalls of the metal layer 320. Wherein, as... Figure 1 As shown, the barrier layer 400 may only cover the sidewalls of the metal layer 320, and the barrier layer 400 may be suspended relative to the substrate 100.

[0068] For example, such as Figure 2As shown, the barrier layer 400 can also cover the sidewalls of the first conductive layer 310.

[0069] For example, the metal layer 320 is made of a metallic material that has electrical conductivity and high reflectivity. The metal layer 320 is used to transmit an anode signal between the first conductive layer 310 and the second conductive layer 330, so as to control the light emission of the light-emitting functional layer 500 through the anode signal. The metal layer 320 is also used to reflect light incident on the anode layer 300, thereby increasing the light output of the display pixels and improving the light utilization rate of the display pixels. The barrier layer 400 is made of an insulating material.

[0070] Understandably, when the anode layer 300 is spaced apart from the sidewall P of the pixel opening H, the sidewall of the metal layer 320 is exposed to the external environment. This can lead to the formation of conductive ions near the sidewall, which, when the anode layer 300 is energized, can cause leakage through the ionized ions. By using the barrier layer 400 to block the ionization, the leakage phenomenon of the metal layer 320 can be suppressed.

[0071] It should be noted that when the light-emitting functional layer 500 is prepared by solution method, the solution includes light-emitting material particles and hole transport material particles, wherein the hole transport material has a low lateral mobility. Therefore, after the solution evaporates, some light-emitting material and hole transport material that were in contact with the anode layer 300 may remain on the surface of the barrier layer 400 away from the substrate 100, but they usually do not emit light. Simultaneously, a high-concentration solution usually accumulates in the first groove K1 formed by the sidewall P of the pixel opening H and the barrier layer 400. However, due to the obstruction of the barrier layer 400, the high-concentration solution will not be electrically connected to the anode layer 300 after evaporation, so the material in the first groove K1 will not emit light after evaporation. In summary, only the light-emitting material and hole transport material on the side of the anode layer 300 away from the substrate 100 can emit light.

[0072] The display panel provided in this application embodiment has an anode layer 300 disposed within the pixel opening H of the pixel defining layer 200, with the anode layer 300 and the sidewall P of the pixel opening H spaced apart. A barrier layer 400 is disposed on the sidewall of the metal layer 320 of the anode layer 300. A first groove K1 can be formed between the anode layer 300 and the sidewall P of the pixel opening H. This improves the uniformity of pixel particle distribution during the solution-based pixel formation process. By blocking ion ionization of the metal layer 320 through the barrier layer 400 located on the sidewall of the metal layer 320, leakage of the anode layer 300 can be suppressed. This prevents ionized ions from illuminating the pixel particles within the first groove K1, improves the control capability of the anode layer 300 over the display pixels, avoids crosstalk in the display image, thereby improving the brightness uniformity of the display image, reducing the risk of brown rings on the display panel, and improving the display effect and performance of the display panel.

[0073] like Figure 1 and Figure 2 As shown, in some feasible embodiments, the barrier layer 400 is spaced apart from the sidewall P of the pixel opening H.

[0074] For example, the sidewalls of the substrate 100, the anode layer 300, and the sidewall P of the pixel opening H together form a first groove K1.

[0075] For example, such as Figure 2 As shown, the barrier layer 400 is not in contact with the sidewall P of the pixel opening H, which allows the substrate 100, the barrier layer 400, and the sidewall P of the pixel opening H to jointly form the second groove K2. The orthographic projection edge of the surface of the barrier layer 400 near the substrate 100 falls within the orthographic projection edge of the bottom of the opening on the substrate 100.

[0076] For example, the barrier layer 400 is in contact with the sidewall P portion of the pixel opening H, and the orthographic projection edge of the surface of the barrier layer 400 on the substrate 100 near the substrate 100 covers the orthographic projection edge of the bottom of the opening on the substrate 100.

[0077] like Figure 3 As shown, the orthographic projection of the barrier layer 400 on the substrate 100 covers the orthographic projection of the bottom of the first groove K1 on the substrate 100. The barrier layer 400 is in contact with the substrate 100, and its thickness is less than that of the anode layer 300 in the direction perpendicular to the substrate 100. The sidewalls of the barrier layer 400, the anode layer 300, and the pixel opening H together form the third groove K3. The sidewall P of the pixel opening H insulates the pixel particles in the fourth groove from the anode layer 300, preventing leakage from the anode layer 300 and affecting the illumination effect of the display pixels.

[0078] For example, in the preparation of such Figure 3 In the process of creating the barrier layer 400 shown, if both the pixel defining layer 200 and the barrier layer 400 are made of the same inorganic material, the barrier layer 400 and the pixel defining layer 200 can be prepared simultaneously.

[0079] It should be noted that when the barrier layer 400 is in contact with the sidewall P of the pixel opening H, the distance between the surface of the barrier layer 400 away from the substrate 100 and the surface of the anode layer 300 away from the substrate 100 is small. This results in a small height difference between the anode layer 300 and the barrier layer 400. During the solution evaporation process, the time required for the surface of the anode layer 300 and the surface of the barrier layer 400 to evaporate is similar, and the evaporation time is relatively long. This can easily lead to an excessively low solution concentration on the surface of the anode layer 300, which affects the fabrication effect of the display pixel.

[0080] The display panel provided in this application embodiment forms a second groove K2 between the barrier layer 400 and the sidewall P of the pixel opening H. During the evaporation of the solution, pixel particles continuously accumulate towards the edge of the droplet, resulting in a higher concentration of pixel particles in the solution at the droplet edge compared to the center. The height difference between the barrier layer 400 and the anode layer 300 surface allows the barrier layer 400 to separate the high-concentration solution from the low-concentration solution during evaporation. Furthermore, the barrier layer 400 surface further evaporates the higher-concentration solution, thereby improving the uniformity of pixel particle distribution on the anode layer 300 surface. This enhances the uniformity of pixel film formation on the side of the anode layer 300 away from the substrate 100, reduces the risk of pixel illumination from the high-concentration solution in the second groove, further suppresses the "coffee ring" phenomenon in the display panel, improves the brightness uniformity of the displayed image, and enhances the display effect and performance of the display panel.

[0081] In some feasible implementations, the barrier layer 400 covers the entire sidewall of the metal layer 320.

[0082] For example, such as Figure 4 As shown, the barrier layer 400 can cover part of the sidewall of the metal layer 320.

[0083] The display panel provided in this application embodiment can improve the blocking ability of the blocking layer 400 to block free ions, further reduce the leakage risk of the anode layer 300, prevent free ions from lighting up the pixel particles in the second groove K2, improve the control ability of the anode layer 300 over the display pixels, avoid crosstalk in the display screen, thereby improving the brightness uniformity of the display screen, reducing the risk of coffee ring on the display panel, and improving the display effect and display performance of the display panel.

[0084] like Figure 1As shown, in some feasible embodiments, the barrier layer 400 is spaced apart from the substrate 100.

[0085] The display panel provided in this application embodiment, by suspending the barrier layer 400, allows high-concentration solution at the edge of the droplet to flow into the gap between the barrier layer 400 and the substrate 100, thereby increasing the capacity for high-concentration solution. It can also further reduce the distance between the barrier layer 400 and the sidewall P of the pixel opening H, preventing backflow of high-concentration solution. This improves the uniformity of display pixel film formation on the surface of the anode layer 300 away from the substrate 100, reduces the risk of pixel illumination caused by high-concentration solution, further reduces the risk of brown rings on the display panel, improves the brightness uniformity of the displayed image, and enhances the display effect and performance of the display panel.

[0086] In some feasible embodiments, the barrier layer 400 is in contact with the substrate 100; the barrier layer 400 is in contact with at least a portion of the sidewalls of the first conductive layer 310.

[0087] The display panel provided in this application embodiment can improve the blocking ability of the blocking layer 400 by contacting the blocking layer 400 with the substrate 100, thereby preventing the pixel particles in the second groove K2 between the sidewall P of the pixel opening H and the blocking layer 400 from contacting the first conductive layer 310, and preventing the sidewall of the first conductive layer 310 from causing the pixel particles in the second groove to emit light, thereby improving the brightness uniformity of the display screen and improving the display effect and display performance of the display panel.

[0088] like Figure 5 As shown, in some feasible embodiments, the barrier layer 400 is in contact with at least a portion of the sidewall of the second conductive layer 330.

[0089] The display panel provided in this application embodiment, by increasing the thickness of the blocking layer 400, can completely block the sidewalls of the metal layer 320, thereby improving the blocking ability of the blocking layer 400 to block free ions, further reducing the leakage risk of the anode layer 300, preventing free ions from lighting up pixel particles on the surface of the blocking layer 400 away from the substrate 100, improving the control ability of the anode layer 300 over the display pixels, avoiding crosstalk in the display image, thereby improving the brightness uniformity of the display image, reducing the risk of brown rings on the display panel, and improving the display effect and display performance of the display panel.

[0090] like Figure 5 As shown, in some feasible embodiments, in a direction perpendicular to the substrate 100, the thickness dimension H1 of the barrier layer 400 is greater than or equal to the sum of the thickness dimensions H2 of the first conductive layer 310 and the metal layer 320.

[0091] For example, the thickness of the barrier layer 400 in the direction perpendicular to the substrate 100 can be greater than the thickness of the anode layer 300. By increasing the thickness of the barrier layer 400 in the direction perpendicular to the substrate 100, the barrier capability of the barrier layer 400 can be improved, and the leakage risk of the anode layer 300 can be reduced.

[0092] It should be noted that when there is a height difference between the barrier layer 400 and the anode layer 300, as the solution evaporates, the sidewalls of the anode layer 300 and the barrier layer 400 will separate the solution, causing the solution to evaporate on the surface of the anode layer 300 away from the substrate 100, the surface of the barrier layer 400 away from the substrate 100, and within the first groove K1, respectively. Specifically, when the thickness of the barrier layer 400 is greater than that of the anode layer 300, the larger the thickness of the barrier layer 400, the earlier it will separate the solution during evaporation. This results in a smaller concentration difference between the solution on the surface of the barrier layer 400 and within the first groove K1 and the solution on the surface of the anode layer 300 away from the substrate 100. Consequently, the solution on the surface of the anode layer 300 away from the substrate 100 will still exhibit the coffee ring effect during evaporation. When the thickness of the barrier layer 400 is smaller than that of the anode layer 300, a larger thickness of the barrier layer 400 results in a smaller height difference between the surfaces of the barrier layer 400 and the anode layer 300. This increases the risk of electrical connection between the display pixels formed on the surfaces of the barrier layer 400 and the anode layer 300 after evaporation, further reducing the brightness uniformity of the display pixels. Therefore, there is a positive correlation between the thickness of the barrier layer 400 along the direction perpendicular to the substrate 100 and the risk of forming a coffee ring on the display panel.

[0093] It should be noted that, with the same electrical signal in the anode layer 300, the display pixels prepared with a higher concentration solution produce a deeper emitted light color, and the display pixels are more resistant to the coffee ring effect. That is, when the concentration difference between the droplet edge and the droplet center is the same, the display pixel prepared with a higher concentration solution has a smaller difference in emitted light color between the edge and center regions. Therefore, there is a positive correlation between the solution concentration and the display panel's resistance to the coffee ring effect.

[0094] The display panel provided in this application embodiment allows the barrier layer 400 to completely block the sidewalls of the metal layer 320, thereby improving the barrier layer 400's ability to block free ions, further reducing the leakage risk of the anode layer 300, preventing free ions from illuminating pixel particles on the side of the barrier layer 400 away from the substrate 100, improving the anode layer 300's control over the display pixels, avoiding crosstalk in the display image, thereby improving the brightness uniformity of the display image, reducing the risk of brown rings on the display panel, and improving the display effect and performance of the display panel.

[0095] like Figure 5 As shown, in some feasible embodiments, the thickness dimension H1 of the barrier layer 400 is smaller than the thickness dimension H2 of the anode layer 300 in a direction perpendicular to the substrate 100.

[0096] The display panel provided in this application embodiment can reduce the risk of coffee ring effect generated on the surface of the anode layer 300 away from the substrate 100 during the solution preparation of display pixels, improve the brightness uniformity of the display screen, reduce the risk of coffee ring in the display panel, and improve the display effect and display performance of the display panel.

[0097] like Figure 2 and Figure 5 As shown, in some feasible embodiments, the sidewalls of the substrate 100, the anode layer 300, and the sidewall P of the pixel opening H together form a first groove K1; in a direction parallel to the substrate 100, the size of the orthogonal projection of the first groove K1 onto the substrate 100 is a first dimension L1, and the size of the orthogonal projection of the barrier layer 400 onto the substrate 100 is a second dimension L2; wherein, the first dimension L1 is greater than the second dimension L2.

[0098] The display panel provided in this application embodiment allows a second groove K2 to be formed between the barrier layer 400 and the sidewall P of the pixel opening H. During the evaporation of the solution, when pixel particles continuously gather towards the edge of the droplet, the pixel particle concentration at the edge of the droplet will be higher than the pixel particle concentration at the center of the droplet. The barrier layer 400 can separate the high-concentration solution from the low-concentration solution during the evaporation process, thereby improving the uniformity of pixel particle distribution on the surface of the anode layer 300, improving the film uniformity of the display pixels on the surface of the anode layer 300, further suppressing the coffee ring phenomenon of the display panel, improving the brightness uniformity of the display screen, and improving the display effect and display performance of the display panel.

[0099] In some feasible implementations, the ratio of the second dimension L2 to the first dimension L1 ranges from 20% to 50%.

[0100] For example, the ratio of the second dimension L2 to the first dimension L1 can be 20%, 27.5%, 35%, 42.5%, and 50%.

[0101] It should be noted that a small ratio of the second dimension L2 to the first dimension L1 will result in an excessively large space occupied by the second groove K2, further increasing the space occupied by individual display pixels. This leads to a lower pixel density within the display panel, affecting the resolution of the displayed image. Conversely, a large ratio of the second dimension L2 to the first dimension L1 will result in insufficient space within the second groove K2. This can cause the high-concentration solution within the second groove K2 to backflow before complete evaporation, raising the liquid level of the high-concentration solution. This increases the risk of electrical connection between the display pixels formed by the high-concentration solution within the second groove K2 and the display pixels on the surface of the anode layer 300. This can improve the uniformity of pixel film formation on the side of the anode layer 300 away from the substrate 100, reducing the risk of the high-concentration solution-formed display pixels lighting up. However, this also affects the fabrication effect of the display pixels on the side of the anode layer 300 away from the substrate 100, increasing the risk of the high-concentration solution-formed display pixels lighting up and consequently increasing the risk of the "coffee ring" effect on the display panel.

[0102] The display panel provided in this application embodiment can improve the space utilization of the first groove K1 between the anode layer 300 and the sidewall P of the pixel opening H, effectively accommodate the high-concentration pixel particle solution at the edge of the droplet, avoid solution backflow, improve the uniformity of display pixel film formation on the surface of the anode layer 300 away from the substrate 100, reduce the risk of lighting up display pixels formed by high-concentration solution, save the space occupied by a single display pixel, increase the distribution density of display pixels in the display panel, thereby improving the resolution of the display image, thus improving the brightness uniformity of the display image, reducing the risk of brown rings on the display panel, and improving the display effect and display performance of the display panel.

[0103] In some feasible implementations, the ratio of the second dimension L2 to the first dimension L1 ranges from 20% to 35%.

[0104] The display panel provided in this application embodiment can further improve the space utilization rate of the first groove K1 between the anode layer 300 and the sidewall P of the pixel opening H, effectively accommodate the high-concentration pixel particle solution at the edge of the droplet, avoid solution backflow, improve the uniformity of display pixel film formation on the surface of the anode layer 300 away from the substrate 100, reduce the risk of lighting up display pixels formed by high-concentration solution, save the space occupied by a single display pixel, increase the distribution density of display pixels in the display panel, thereby improving the resolution of the display screen, thus improving the brightness uniformity of the display screen, reducing the risk of coffee ring on the display panel, and improving the display effect and display performance of the display panel.

[0105] like Figure 2 and Figure 4As shown, in some feasible embodiments, the sidewalls of the substrate 100 and the anode layer 300, together with the sidewall P of the pixel opening H, form a first groove K1; in a direction parallel to the substrate 100, the size of the orthographic projection of the first groove K1 onto the substrate 100 is a first size L1, and the size of the orthographic projection of the pixel opening H onto the substrate 100 is a third size L3; wherein, the ratio of the first size L1 to the third size L3 ranges from 5% to 20%.

[0106] For example, the ratio of the first dimension L1 to the third dimension L3 can be 5%, 9%, 13%, 17%, and 20%.

[0107] It should be noted that if the ratio of the first dimension L1 to the third dimension L3 is too small, the space within the first groove K1 will be insufficient, causing the high-concentration solution in the second groove K2 to backflow before complete evaporation. This raises the liquid level of the high-concentration solution, increasing the risk of electrical connection between the display pixels formed by the high-concentration solution in the second groove K2 and the display pixels on the surface of the anode layer 300. This affects the uniformity of the display pixel film formation on the side of the anode layer 300 away from the substrate 100, impacting the fabrication effect of the display pixels on this side. This increases the risk of the high-concentration solution-formed display pixels lighting up, leading to a higher risk of the "coffee ring" effect on the display panel and also affecting the setting of the barrier layer 400. Conversely, if the ratio of the first dimension L1 to the third dimension L3 is too large, the space occupied by the first groove K1 between the anode layer 300 and the sidewall P of the pixel opening H will be too large, further increasing the space occupied by individual display pixels. This results in a lower pixel density within the display panel, affecting the resolution of the displayed image.

[0108] The display panel provided in this application embodiment can improve the space utilization of the first groove K1 between the anode layer 300 and the sidewall P of the pixel opening H, effectively accommodate the high-concentration solution at the edge of the droplet, avoid solution backflow, improve the uniformity of the display pixel film formation on the surface of the anode layer 300 away from the substrate 100, reduce the risk of the display pixel being lit by the high-concentration solution, save the space occupied by a single display pixel, increase the distribution density of the display pixels in the display panel, thereby improving the resolution of the display screen, thus improving the brightness uniformity of the display screen, reducing the risk of the display panel having a brown ring, and improving the display effect and display performance of the display panel.

[0109] In some feasible implementations, the ratio of the first dimension L1 to the third dimension L3 ranges from 5% to 10%.

[0110] The display panel provided in this application embodiment can further improve the space utilization rate of the first groove K1 between the anode layer 300 and the sidewall P of the pixel opening H, effectively accommodate the high-concentration solution at the edge of the droplet, avoid solution backflow, improve the uniformity of the display pixel film formation on the surface of the anode layer 300 away from the substrate 100, reduce the risk of the display pixel being lit by the high-concentration solution, save the space occupied by a single display pixel, increase the distribution density of the display pixels in the display panel, thereby improving the resolution of the display screen, thus improving the brightness uniformity of the display screen, reducing the risk of the display panel having a brown ring, and improving the display effect and display performance of the display panel.

[0111] like Figure 6 As shown, in some feasible embodiments, the orthographic projection of the surface of the barrier layer 400 on the substrate 100 away from the substrate 100 falls inside the edge of the orthographic projection of the surface of the barrier layer 400 on the substrate 100 near the substrate 100.

[0112] For example, the orthographic projection of the surface of the barrier layer 400 near the substrate 100 onto the substrate 100 falls inside the edge of the orthographic projection of the surface of the barrier layer 400 away from the substrate 100 onto the substrate 100. By setting the shape of the barrier layer 400, which is wider at the top and narrower at the bottom, backflow of the high-concentration solution between the barrier layer 400 and the sidewall P of the pixel opening H can be prevented, causing the liquid level of the high-concentration solution to rise. This affects the uniformity of the display pixel film formation on the surface of the anode layer 300 away from the substrate 100, increasing the risk of electrical connection between the display pixel formed by the high-concentration solution in the second groove and the display pixel on the surface of the anode layer 300. This increases the risk of the display pixel formed by the high-concentration solution lighting up, thereby improving the display panel's resistance to the coffee ring effect.

[0113] The display panel provided in this application embodiment, by forming a barrier layer 400 with a narrow upper and wide lower structure, can further increase the surface area of ​​the solution on the side away from the substrate 100 in the second groove during the solution evaporation process. This can increase the evaporation area of ​​the solution, accelerate the evaporation rate of the barrier layer 400 surface, and further improve the uniformity of pixel distribution on the surface of the anode layer 300 away from the substrate 100. This can improve the brightness uniformity of the display screen, suppress the coffee ring effect of the display screen, and improve the display effect and display performance of the display panel.

[0114] In some feasible implementations, the surface of the barrier layer 400 on the side away from the substrate 100 includes at least one of a stepped surface and an arcuate surface.

[0115] like Figure 7 As shown, the surface of the barrier layer 400 on the side away from the substrate 100 includes a stepped surface.

[0116] like Figure 8 As shown, the surface of the barrier layer 400 on the side away from the substrate 100 includes an arcuate surface.

[0117] The display panel provided in this application embodiment can increase the solution evaporation area on the side of the barrier layer 400 away from the substrate 100 during the solution evaporation process, thereby accelerating the evaporation rate of the barrier layer 400 surface. At the same time, it can make the solution flow down along the surface of the barrier layer 400 during the evaporation process, further accelerating the evaporation rate of the solution. This can further improve the uniformity of pixel particle distribution on the side of the anode layer 300 away from the substrate 100, improve the brightness uniformity of the display screen, suppress the coffee ring effect of the display screen, and improve the display effect and display performance of the display panel.

[0118] In some feasible implementations, the material of the barrier layer 400 includes an inorganic insulating material.

[0119] For example, the material of the barrier layer 400 may include at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0120] The display panel provided in this application embodiment can block the ionization of ions in the anode layer 300, suppress the leakage phenomenon of the anode layer 300, improve the lighting effect of display pixels, suppress crosstalk problems of display screen, improve the brightness uniformity of display screen, and improve the display performance and display effect of display panel.

[0121] In some feasible embodiments, the materials of the first conductive layer 310 and the second conductive layer 330 include indium tin oxide.

[0122] It should be noted that indium tin oxide is a transparent material with high electrical conductivity, thermal stability, and chemical stability.

[0123] The display panel provided in this application embodiment forms a first conductive layer 310 and a second conductive layer 330 through indium tin oxide. This allows light that has been reflected by the sidewall of the pixel defining layer 200 and incident on the anode layer 300 to reach the surface of the metal layer 320 via the first conductive layer 310 and the second conductive layer 330, and then reflected by the metal layer 320. This improves light utilization, increases the light output of the display pixels, and enhances the display effect and display performance of the display panel.

[0124] In some feasible implementations, the material of the metal layer 320 includes silver.

[0125] The display panel provided in this application embodiment can improve the reflectivity of the metal layer 320, avoid color shift in the light reflected by the metal layer 320, thereby improving light utilization, increasing the light output of display pixels, improving the accuracy of the display image, improving the display effect and display performance of the display panel.

[0126] like Figures 1 to 8 As shown, in some feasible embodiments, the display panel further includes a light-emitting functional layer 500 and a cathode layer 600. The light-emitting functional layer 500 is located on the side of the anode layer 300 away from the substrate 100, and is formed by a solution method; the cathode layer 600 is located on the side of the light-emitting functional layer 500 away from the substrate 100.

[0127] like Figures 1 to 8 As shown, the light-emitting functional layer 500 includes a light-emitting region 501, a first non-light-emitting region 502, and a second non-light-emitting region 503. For example... Figure 9 As shown, in Figure 2 In the structure shown, the solution droplets of the light-emitting functional layer 500 are disposed within the pixel opening H of the pixel defining layer 200. For example... Figure 10 As shown, in Figure 9 As shown, after the solution droplets evaporate for a period of time, the curvature of the droplet surface gradually decreases. Figure 11 As shown, in Figure 10 When the solution droplets shown are separated by the sidewalls of the anode layer 300 and the barrier layer 400, the solution concentration in the light-emitting region 501 on the surface of the anode layer 300 away from the substrate 100 is lower, the solution concentration uniformity at each location is higher, and the droplet surface curvature is smaller. The solution concentration in the first non-light-emitting region 502 on the surface of the barrier layer 400 away from the substrate 100 is higher than that in the light-emitting region 501, and the droplet surface curvature in the first non-light-emitting region 502 is larger than that in the light-emitting region 501. However, due to the smaller width of the barrier layer 400, the overall droplet surface curvature in the first non-light-emitting region 502 is smaller. The solution concentration in the second non-light-emitting region 503 between the barrier layer 400 and the sidewall of the pixel defining layer 200 is the highest, greater than the solution concentrations in the light-emitting region 501 and the first non-light-emitting region 502. Meanwhile, since the solution in the second non-light-emitting region 503 is in contact with the sidewalls of the pixel defining layer 200 and the barrier layer 400, the stress between the solution and the solid sidewalls will cause the droplet center to gradually form a depression during further evaporation.

[0128] The display panel provided in this application embodiment forms the light-emitting functional layer 500 using a solution method, which can improve the fabrication efficiency of the light-emitting functional layer 500, reduce the fabrication difficulty, and improve the uniformity of pixel particle distribution. By using the barrier layer 400 located on the sidewall of the metal layer 320 to block the ion ionization of the metal layer 320, the leakage phenomenon of the anode layer 300 can be suppressed, and the ionized ions can be prevented from lighting up the pixel particles in the first groove K1. This improves the control capability of the anode layer 300 over the display pixels, avoids crosstalk in the display screen, thereby improving the brightness uniformity of the display screen, reducing the risk of coffee ring on the display panel, and improving the display effect and display performance of the display panel.

[0129] like Figure 12 As shown, in a second aspect of the embodiments of this application, a display device is provided, including a display panel 1000 as described in any of the first aspects above.

[0130] The display device provided in this application embodiment has an anode layer 300 disposed within the pixel opening H of the pixel defining layer 200, with the anode layer 300 spaced apart from the sidewall P of the pixel opening H. A barrier layer 400 is disposed on the sidewall of the metal layer 320 of the anode layer 300. A first groove K1 can be formed between the anode layer 300 and the sidewall P of the pixel opening H. This improves the uniformity of pixel particle distribution during the solution-based pixel formation process. By blocking ion ionization of the metal layer 320 through the barrier layer 400 located on the sidewall of the metal layer 320, leakage of the anode layer 300 can be suppressed. This prevents ionized ions from illuminating the pixel particles in the first groove K1, improves the control capability of the anode layer 300 over the display pixels, avoids crosstalk in the display image, thereby improving the brightness uniformity of the display image, reducing the risk of brown rings in the display image, and improving the display effect and performance.

[0131] It is understood that the display device in the embodiments of this application can be any product or component with display function, such as OLED display device, QLED display device, electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, wearable device, Internet of Things device, etc., and the embodiments disclosed in this application do not limit this.

[0132] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0133] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A display panel, characterized in that, include: Substrate; A pixel defining layer is located on one side of the substrate, and the pixel defining layer surrounds and forms a plurality of pixel openings; An anode layer is located inside the pixel opening and is spaced apart from the sidewall of the pixel opening. The anode layer includes a first conductive layer, a metal layer, and a second conductive layer stacked sequentially along the thickness direction of the substrate. The first conductive layer is in contact with the substrate. A barrier layer is located within the pixel opening and is disposed in contact with the sidewall of the anode layer, wherein the barrier layer is at least partially located on the sidewall of the metal layer.

2. The display panel according to claim 1, characterized in that, The blocking layer is spaced apart from the sidewall of the pixel opening; Optionally, the barrier layer covers all sidewalls of the metal layer.

3. The display panel according to claim 1, characterized in that, The barrier layer is spaced apart from the substrate.

4. The display panel according to claim 1, characterized in that, The barrier layer is in contact with the substrate; The barrier layer is in contact with at least a portion of the sidewall of the first conductive layer; Optionally, the barrier layer is in contact with at least a portion of the sidewall of the second conductive layer; Optionally, along a direction perpendicular to the substrate, the thickness of the barrier layer is greater than or equal to the sum of the thicknesses of the first conductive layer and the metal layer; Optionally, the thickness of the barrier layer is smaller than the thickness of the anode layer along the thickness direction perpendicular to the substrate.

5. The display panel according to claim 1, characterized in that, The substrate, the sidewall of the anode layer, and the sidewall of the pixel opening together form a first groove; In a direction parallel to the substrate, the size of the orthographic projection of the first groove onto the substrate is a first size, and the size of the orthographic projection of the barrier layer onto the substrate is a second size; Wherein, the first dimension is larger than the second dimension; Optionally, the ratio of the second dimension to the first dimension ranges from 20% to 50%.

6. The display panel according to claim 5, characterized in that, The ratio of the second dimension to the first dimension ranges from 20% to 35%.

7. The display panel according to claim 1, characterized in that, The substrate, the sidewall of the anode layer, and the sidewall of the pixel opening together form a first groove; In a direction parallel to the substrate, the size of the orthographic projection of the first groove onto the substrate is a first size, and the size of the orthographic projection of the pixel opening onto the substrate is a third size; The ratio of the first dimension to the third dimension ranges from 5% to 20%.

8. The display panel according to claim 7, characterized in that, The ratio of the first dimension to the third dimension ranges from 5% to 10%.

9. The display panel according to claim 1, characterized in that, The orthographic projection of the surface of the barrier layer on the substrate away from the substrate falls inside the edge of the orthographic projection of the surface of the barrier layer on the substrate closer to the substrate. Optionally, the surface of the barrier layer on the side away from the substrate includes at least one of a stepped surface and an arcuate surface; Optionally, the material of the barrier layer includes inorganic insulating materials; Optionally, the materials of the first conductive layer and the second conductive layer include indium tin oxide; Optionally, the material of the metal layer includes silver; Optionally, the display panel further includes: A light-emitting functional layer is located on the side of the anode layer away from the substrate, wherein the light-emitting functional layer is formed by a solution method; The cathode layer is located on the side of the light-emitting functional layer away from the substrate.

10. A display device, characterized in that, include: The display panel as described in any one of claims 1 to 9.

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