Display panel, display panel manufacturing method, and display apparatus

Abstract

Disclosed in the present application are a display panel, a display panel manufacturing method, and a display apparatus. The display panel comprises: a substrate layer; a pixel definition layer, which comprises a pixel opening region and a pixel definition region; an auxiliary electrode layer, which is arranged on the end of the pixel definition region that faces away from the substrate layer; a cathode layer, wherein one part of the cathode layer is arranged in the pixel opening region, and the other part of the cathode layer extends to the pixel definition region and is electrically connected to the auxiliary electrode layer; and a barrier film layer, which is arranged on the side of the auxiliary electrode layer that faces away from the pixel definition region, wherein the surface of the barrier film layer that is away from one end of the substrate layer is farther away from the substrate layer than the surface of the cathode layer that is away from the substrate layer, and the barrier film layer is arranged surrounding the pixel opening region. Thus, in a manufacturing process, water vapor can be prevented from laterally permeating, thereby guaranteeing the smooth proceeding of product production and a subsequent encapsulation process.

Description

Display panel, display panel manufacturing method, and display device Technical Field

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

[0002] Display panels (backlight modules) are mainly used in various types of liquid crystal display devices, such as laptops, flat-screen TVs, mobile phones, car dashboards, billboards, airport terminal displays, etc.

[0003] If the display panel is manufactured using photolithography and etching processes, the semi-finished panel needs to be simply packaged and removed from the vacuum chamber, and then the photolithography and etching processes are carried out. Therefore, during the removal process and the photolithography and etching process, it is easily affected by water vapor in the atmosphere and requires targeted solutions. Summary of the Invention

[0004] The purpose of this application is to provide a display panel, a display panel manufacturing method and a display device.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0006] substrate layer;

[0007] A pixel definition layer, comprising a pixel opening region and a pixel definition region;

[0008] an auxiliary electrode layer, the auxiliary electrode layer being disposed at one end of the pixel definition area away from the substrate layer;

[0009] a cathode layer, wherein a portion of the cathode layer is disposed in the pixel opening area, and another portion extends to the pixel definition area and is electrically connected to the auxiliary electrode layer;

[0010] A blocking film layer is provided on a side of the auxiliary electrode layer away from the pixel definition area, and a surface of one end of the blocking film layer away from the substrate layer is farther away from the substrate layer than a surface of the cathode layer away from the substrate layer; the blocking film layer is provided around the peripheral side of the pixel opening area.

[0011] In one embodiment, the barrier film layer includes a first barrier layer and a second barrier layer, the orthographic projection of the first barrier layer onto the substrate layer is located within the orthographic projection of the second barrier layer onto the substrate layer, and the first barrier layer is closer to the substrate layer than the second barrier layer.

[0012] In one embodiment, the thickness of the first barrier layer is greater than or equal to 2 um.

[0013] In one embodiment, along the thickness direction, the orthographic projection of the second barrier layer on the substrate layer and the orthographic projection of the pixel opening area do not overlap and there is a gap;

[0014] Along the thickness direction, the orthographic projection of the second barrier layer on the substrate layer covers the orthographic projection of the auxiliary electrode layer on the substrate layer; or, along the thickness direction, the orthographic projection of the second barrier layer on the substrate layer falls within the orthographic projection of the auxiliary electrode layer on the substrate layer, and the maximum distance from the edge of the orthographic projection of the second barrier layer on the substrate layer to the edge of the orthographic projection of the auxiliary electrode layer on the substrate layer is less than or equal to 2um.

[0015] In one embodiment, the materials of the first barrier layer and the second barrier layer include metal and / or inorganic matter.

[0016] In one embodiment, the materials of the first barrier layer and the second barrier layer are both metal, or,

[0017] The materials of the first barrier layer and the second barrier layer are both inorganic, or,

[0018] The material of one of the first barrier layer and the second barrier layer is metal, and the material of the other is inorganic.

[0019] In one embodiment, the display panel further includes a light-emitting material layer, the light-emitting material layer includes a light-emitting unit, a portion of the structure of the light-emitting unit is located in the pixel opening area, and another portion of the structure of the light-emitting unit extends to the pixel definition area, and the light-emitting unit located in the pixel definition area and the auxiliary electrode layer are spaced apart, and the cathode layer is located in the gap between the light-emitting unit and the auxiliary electrode layer.

[0020] In one embodiment, the distance between the light emitting unit and the auxiliary electrode layer is greater than or equal to 0.5 um and less than or equal to 5 um.

[0021] In one embodiment, the light-emitting material layer further includes a separation unit, and the separation unit is located on the auxiliary electrode layer, and the separation unit is spaced apart from the light-emitting unit.

[0022] In one embodiment, the display panel further includes an isolation layer, which is disposed between the pixel definition layer and the auxiliary electrode layer, and an orthographic projection of the isolation layer onto the substrate layer is located within an orthographic projection of the auxiliary electrode layer onto the substrate layer.

[0023] In one embodiment, a surface of the isolation layer at one end away from the substrate layer is farther away from the substrate layer than a surface of the barrier film layer located in the thickness region at one end away from the substrate layer.

[0024] In one embodiment, the isolation layer is made of metal and / or inorganic matter.

[0025] In one embodiment, the blocking film layer includes a second blocking layer, which is arranged on the side of the auxiliary electrode layer away from the pixel definition area, and the positive projection of the auxiliary electrode layer onto the substrate layer is located within the positive projection of the second blocking layer onto the substrate layer.

[0026] In one embodiment, the thickness of the auxiliary electrode layer is greater than or equal to 2 um.

[0027] According to a second aspect of an embodiment of the present application, a method for manufacturing a display panel is provided, for manufacturing the display panel described in the above embodiment, comprising:

[0028] providing a substrate layer;

[0029] A pixel definition layer, an auxiliary electrode layer, and a barrier film layer are sequentially prepared on one side of the substrate layer.

[0030] The pixel definition layer at least includes a plurality of pixel opening areas and a pixel definition area. The auxiliary electrode layer is arranged in the pixel definition area. The barrier film layer is arranged on a side of the auxiliary electrode layer away from the pixel definition area.

[0031] In some embodiments, the display panel manufacturing method further includes:

[0032] Evaporating a light-emitting material layer in the pixel opening area;

[0033] vapor-depositing a cathode layer on a side of the light-emitting material layer facing away from the substrate;

[0034] The evaporation angle of the cathode layer is greater than the evaporation angle of the light-emitting material layer.

[0035] According to a third aspect of the embodiments of the present application, a display device is provided, comprising the display panel as described in the above embodiments.

[0036] The display panel of the present application is provided with a barrier film layer on the auxiliary electrode layer, and the surface of the barrier film layer at one end away from the substrate layer is arranged to be farther away from the substrate layer than the surface of the cathode layer away from the substrate layer. In this way, during the manufacturing process, lateral penetration of water vapor can be prevented, thereby ensuring the smooth production of products and subsequent packaging processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] FIG1 is a schematic structural diagram of a display panel according to an embodiment of the present application.

[0039] FIG2 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0040] FIG3 is a schematic structural diagram of a display panel according to yet another embodiment of the present application.

[0041] FIG4 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0042] FIG5 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0043] FIG6 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0044] FIG7 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0045] FIG8 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0046] FIG9 is a schematic structural diagram of a display panel according to another embodiment of the present application.

[0047] FIG. 10 is a perspective diagram illustrating the fabrication of a display panel according to an embodiment of the present application.

[0048] FIG. 11 is a perspective diagram illustrating the fabrication of yet another display panel according to an embodiment of the present application.

[0049] FIG12 is a schematic diagram of a package of a display panel according to an embodiment of the present application.

[0050] FIG13 is a schematic diagram of packaging of a display panel according to another embodiment of the present application.

[0051] FIG. 14 is a flowchart of manufacturing a display panel according to another embodiment of the present application.

[0052] FIG. 15 is a diagram illustrating a display panel manufacturing process 1 according to an embodiment of the present application.

[0053] FIG. 16 is a diagram 2 of a display panel manufacturing process according to an embodiment of the present application.

[0054] FIG. 17 is a diagram illustrating a display panel manufacturing process according to an embodiment of the present application.

[0055] FIG. 18 is a diagram 1 of a display panel manufacturing process according to another embodiment of the present application.

[0056] FIG. 19 is a diagram 2 of a display panel manufacturing process according to another embodiment of the present application.

[0057] FIG. 20 is a diagram illustrating a display panel manufacturing process according to another embodiment of the present application.

[0058] Description of reference numerals:

[0059] Display panel 10

[0060] Substrate layer 100

[0061] Anode layer 200

[0062] Luminescent material layer 300

[0063] Light emitting unit 310

[0064] Separation unit 320

[0065] cathode layer 400

[0066] Pixel definition layer 500

[0067] Pixel opening area 510

[0068] Pixel definition area 520

[0069] Auxiliary electrode layer 600

[0070] Barrier film layer 700

[0071] First barrier layer 710

[0072] Second barrier layer 720

[0073] Isolation layer 800

[0074] Driving circuit layer 900

[0075] Encapsulation layer 1000

[0076] Airhole 1100

[0077] Thickness direction H DETAILED DESCRIPTION

[0078] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0079] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the art to which this application belongs. The use of "a" or "an," and similar terms in this specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. "Multiple" means two or more. "Include" or "comprising," and similar terms mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising," and their equivalents, and do not exclude other elements or objects. "Connected" or "connected," and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. "On" and / or "below," and similar terms are for convenience only and are not limited to a single position or spatial orientation. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0080] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0081] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0082] The use of "adapted to" or "configured to" in this specification is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0083] The triangles, rectangles, trapezoids, pentagons or hexagons used in the specification and claims of this application are not in the strict sense, and may be approximate triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges and deformations.

[0084] The term "about" as used in the present specification and claims refers to a numerical value that is not strictly limited and allows for process and measurement errors.

[0085] In one exemplary embodiment, the display panel 10 generally includes a substrate layer 100, an anode layer 200, a light-emitting material layer 300, a cathode layer 400, a pixel definition layer 500, an auxiliary electrode layer 600, a driving circuit layer 900, and the like. The substrate layer 100 is the bottom layer of the OLED device and is typically made of glass or plastic. It provides physical support and structural stability for the device. The anode layer 200, located above the substrate layer 100, is typically formed by a stack of indium tin oxide (ITO) and silver (Ag). The anode layer 200 is responsible for introducing current into the OLED device. In some display panels, the anode layer 200 is transparent to allow light to pass through. The light-emitting material layer 300 is one of the most important layers in an OLED device. It contains an organic light-emitting material (typically a fluorescent or phosphorescent material) that emits light when a voltage is applied. The light-emitting material layer 300 can be a single layer, multiple layers, or a layered structure to achieve different colors of light. The cathode layer 400, located above the light-emitting material layer 300, is typically made of a metal material. It provides electron injection when the display panel 10 is working to activate the light-emitting material layer 300 and make it emit light. The pixel definition layer 500 is used to isolate each pixel unit. It can usually be a buffer layer of organic material or inorganic material, and the shape and position of each pixel are defined by a photolithography process or a photolithography plus etching process. The auxiliary electrode layer 600 exists in some OLED device structures to provide additional electric field control and current distribution uniformity. This layer usually uses materials with good conductivity, such as metal or conductive polymer. The driving circuit layer 900 includes functions such as current regulation and pixel control. This layer integrates the driving circuit and logic circuit to control the working state and luminous effect of the display panel 10.

[0086] However, when using photolithography and etching processes to manufacture the display panel 10, the semi-finished display panel 10 needs to be simply packaged and then taken out of the vacuum chamber, and then subjected to photolithography and etching processes. Therefore, during the removal process and the photolithography and etching process, it is easily affected by water vapor in the atmosphere, thereby causing the display panel 10 to fail.

[0087] The present application proposes a display panel 10 , as shown in FIG1 , FIG2 and FIG3 , wherein FIG2 and FIG3 use different cathode evaporation methods, comprising: a substrate layer 100 , a pixel definition layer 500 , an auxiliary electrode layer 600 , a cathode layer 400 , and a barrier film layer 700 . The pixel definition layer 500 includes a pixel opening region 510 and a pixel definition region 520; the auxiliary electrode layer 600 is disposed at the end of the pixel definition region 520 facing away from the substrate layer 100; the cathode layer 400 is partially disposed in the pixel opening region 510, and the other portion extends into the pixel definition region 520 and is electrically connected to the auxiliary electrode layer 600; the barrier film layer 700 is used to block water vapor and is disposed on the side of the auxiliary electrode layer 600 facing away from the pixel definition region 520. The surface of the barrier film layer 700 facing away from the substrate layer 100 is further away from the substrate layer 100 than the surface of the cathode layer 400 facing away from the substrate layer 100; the barrier film layer 700 is disposed around the pixel opening region 510. It should be noted that the material of the barrier film layer 700 herein may include metal and / or inorganic material. The pixel definition layer 500 may be composed of an inorganic material, and the auxiliary electrode layer 600 may be composed of a metal. The cathode layer 400 and the auxiliary electrode layer 600 are electrically connected in that the cathode layer 400 is overlapped on the auxiliary electrode layer 600 .

[0088] Based on the above configuration, the barrier film layer 700 cooperates with the pixel definition area 520 to surround the pixel opening area 510. This prevents lateral water vapor penetration during the photolithography and etching processes used to manufacture the display panel 10, thereby ensuring smooth product production and subsequent packaging processes. Furthermore, the cathode layer 400 is overlapped by the auxiliary electrode layer 600 located below the barrier film layer 700. The cathode layer 400 and the auxiliary electrode layer 600 are connected in parallel, thereby reducing the resistance of the cathode layer 400, thereby resolving the voltage drop problem in the cathode layer 400 and reducing power consumption.

[0089] In one embodiment, as shown in Figures 1, 2, and 3, the barrier film layer 700 includes a first barrier layer 710 and a second barrier layer 720. The orthographic projection of the first barrier layer 710 onto the substrate layer 100 is located within the orthographic projection of the second barrier layer 720 onto the substrate layer 100, and the first barrier layer 710 is closer to the substrate layer 100 than the second barrier layer 720. It should be noted that the materials of the first barrier layer 710 and the second barrier layer 720 may include metal and / or inorganic substances. The materials of the first barrier layer 710 and the second barrier layer 720 may both be metal, or both be inorganic substances, or one of the first barrier layer 710 and the second barrier layer 720 may be metal and the other may be inorganic substances.

[0090] Based on the above configuration, the first barrier layer 710 can prevent water vapor from penetrating in the lateral direction, and the second barrier layer 720 can prevent water vapor from penetrating in the thickness direction H. The combination of the two can provide protection for pixels at multiple angles, making them safer.

[0091] As shown in FIG12 , if the thickness of the first barrier layer 710 is too small, the encapsulation layer 1000 may easily fold in the region between the first barrier layer 710 and the second barrier layer 720 during encapsulation of the display panel 10, thereby forming air holes 1100. During the subsequent inkjet printing (IJP) process for encapsulating the organic material, the organic material cannot flow into the air holes 1100. Consequently, the air holes in the finished display panel may reduce the reliability of the display panel. Therefore, in this embodiment, the thickness of the first barrier layer 710 is set to be greater than or equal to 2 μm. As shown in FIG13 , when the thickness of the first barrier layer 710 is greater than or equal to 2 μm, the air holes 1100 in the region between the first barrier layer 710 and the second barrier layer 720 of the encapsulation layer 1000 will not form, thereby ensuring the performance of the display panel.

[0092] In one embodiment, along the thickness direction H, the orthographic projection of the second barrier layer 720 on the substrate layer 100 does not overlap with the orthographic projection of the pixel opening area 510, and a gap exists. This configuration prevents the second barrier layer 720 from affecting the arrangement of the light-emitting material layer 300 and the cathode layer 400 within the pixel opening area 510, thereby allowing subsequent processes to proceed normally.

[0093] Furthermore, referring to Figures 1, 2, and 3, along the thickness direction H, the orthographic projection of the second barrier layer 720 on the substrate can be arranged to cover the orthographic projection of the auxiliary electrode layer 600 on the substrate layer 100. This arrangement prevents the light-emitting material layer 300 from contacting the auxiliary electrode layer 600 within this range, thereby preventing a short circuit. Alternatively, referring to Figures 5 and 6, along the thickness direction H, the orthographic projection of the second barrier layer 720 on the substrate layer 100 can be arranged to fall within the orthographic projection of the auxiliary electrode layer 600 on the substrate layer 100, and the maximum distance between the edge of the orthographic projection of the second barrier layer 720 on the substrate layer 100 and the edge of the orthographic projection of the auxiliary electrode layer 600 on the substrate layer 100 is less than or equal to 2 μm. In this case, the light-emitting material layer 300 located on the auxiliary electrode layer 600 is disconnected from the light-emitting material layer 300 located in the pixel opening area 510. In this configuration, although part of the light-emitting material layer 300 is disposed on the auxiliary electrode layer 600 , since the light-emitting material layer 300 on the auxiliary electrode layer 600 is not connected to the light-emitting material layer 300 located in the pixel opening area 510 , no short circuit will occur between the auxiliary electrode layer 600 .

[0094] Further, referring to Figures 7, 8, and 9, where Figures 8 and 9 employ different cathode evaporation methods, the light-emitting material layer 300 includes a light-emitting unit 310. A portion of the light-emitting unit 310 is located in the pixel opening region 510, and another portion of the light-emitting unit 310 extends to the pixel definition region 520. Furthermore, the light-emitting unit 310 located in the pixel definition region 520 is spaced apart from the auxiliary electrode layer 600, and the cathode layer 400 is located in the gap between the light-emitting unit 310 and the auxiliary electrode layer 600. The light-emitting unit 310 is the source of light from the display panel 10.

[0095] If the auxiliary electrode layer 600 were in contact with the side of the light-emitting unit 310, some layers in the auxiliary electrode layer 600, such as the hole transport layer (ATL), would directly communicate with the auxiliary electrode layer 600, thereby causing a short circuit. With the above arrangement, the light-emitting unit 310 and the auxiliary electrode layer 600 are not in contact, thereby preventing a short circuit between the light-emitting unit 310 and the auxiliary electrode layer 600. Furthermore, this embodiment further provides the cathode layer 400 within the gap between the light-emitting unit 310 and the auxiliary electrode layer 600, thereby further preventing a short circuit between the light-emitting unit 310 and the auxiliary electrode layer 600.

[0096] When the distance between the light-emitting unit 310 and the auxiliary electrode layer 600 is too small, due to the existence of manufacturing precision, it is easy for the light-emitting unit 310 and the auxiliary electrode layer 600 to contact each other during the manufacturing process, thereby causing a short circuit; when the distance between the light-emitting unit 310 and the auxiliary electrode layer 600 is too large, the single pixel will become larger, thereby affecting the pixel density per unit area. In this embodiment, the distance between the light-emitting unit 310 and the auxiliary electrode layer 600 is set to be greater than or equal to 0.5um and less than or equal to 5um. Such a setting can, on the one hand, avoid the light-emitting unit 310 and the auxiliary electrode layer 600 from contacting each other during the manufacturing process, thereby causing a short circuit, and on the other hand, it can also ensure the size of a single pixel, thereby ensuring the pixel density per unit area.

[0097] In this embodiment, referring to FIG. 7 , FIG. 8 and FIG. 9 , the light emitting material layer 300 further includes a separation unit 320 . The separation unit 320 is located on the auxiliary electrode layer 600 , and is spaced apart from the light emitting unit 310 .

[0098] It should be noted that the separation unit 320 and the light-emitting unit 310 are spaced apart from each other. This can be due to the blocking of the auxiliary electrode layer 600 when the light-emitting material layer 300 is arranged, or it can be formed by etching the separation unit 320 and the light-emitting unit 310 after the light-emitting material layer 300 is arranged. In this arrangement, although the separation unit 320 is arranged on the auxiliary electrode layer 600, the separation unit 320 and the light-emitting unit 310 are spaced apart, so that the separation unit 320 will not be short-circuited with the auxiliary electrode layer 600.

[0099] In one embodiment, referring to FIG7 , FIG8 , and FIG9 , the display panel 10 further includes an isolation layer 800, which is disposed between the pixel definition layer 500 and the auxiliary electrode layer 600. The orthographic projection of the isolation layer 800 onto the substrate layer 100 is located within the orthographic projection of the auxiliary electrode layer 600 onto the substrate layer 100. It should be noted that the material of the isolation layer 800 herein includes metal and / or inorganic material.

[0100] Based on the above arrangement, when arranging the light-emitting material layer 300 , since the orthographic projection of the isolation layer 800 onto the substrate layer 100 is located within the orthographic projection of the auxiliary electrode layer 600 onto the substrate layer 100 , the light-emitting material layer 300 must be broken into the separation unit 320 and the light-emitting unit 310 .

[0101] Furthermore, the surface of the isolation layer 800 at the end away from the substrate layer 100 is further away from the substrate layer 100 than the surface of the barrier film layer 700 located in the thickness region at the end away from the substrate layer 100. The thickness of the isolation layer 800 is set to be greater than the thickness of the light-emitting material layer 300, so a gap is necessarily present between the separation unit 320 and the light-emitting unit 310. Due to the gap between the separation unit 320 and the light-emitting unit 310, the separation unit 320 will not short-circuit with the auxiliary electrode layer 600.

[0102] In one embodiment, referring to Figures 4, 5, and 6, where Figures 5 and 6 employ different cathode evaporation methods, the barrier film layer 700 includes a second barrier layer 720. The second barrier layer 720 is disposed on a side of the auxiliary electrode layer 600 facing away from the upper pixel definition area 520, and the orthographic projection of the auxiliary electrode layer 600 onto the substrate layer 100 is located within the orthographic projection of the second barrier layer 720 onto the substrate layer 100.

[0103] With this configuration, the light emitting material layer 300 will not be in direct contact with the auxiliary electrode layer 600 due to the shielding of the second barrier layer 720 , that is, there is a gap between the light emitting material layer 300 and the auxiliary electrode layer 600 , so no short circuit will occur between the light emitting material layer 300 and the auxiliary electrode layer 600 .

[0104] If the thickness of the auxiliary electrode layer 600 is too small, pores 1100 are likely to form in the region between the auxiliary electrode layer 600 and the second barrier layer 720 during packaging of the display panel 10. During subsequent IJP printing of organic material for packaging, the organic material cannot flow into the pores 1100. Consequently, the pores in the finished display panel can reduce the reliability of the display panel. Therefore, in this embodiment, the thickness of the auxiliary electrode layer 600 is set to be greater than or equal to 2 μm. When the thickness of the auxiliary electrode layer 600 is set to be greater than or equal to 2 μm, pores 1100 will not form in the region between the auxiliary electrode layer 600 and the second barrier layer 720, thereby ensuring that the reliability of the display panel is not reduced.

[0105] The present application also proposes a method for manufacturing a display panel 10, as shown in FIG14 , for manufacturing the display panel 10 described in the above embodiment, comprising:

[0106] S1: providing a substrate layer 100;

[0107] S2: a pixel definition layer 500 , an auxiliary electrode layer 600 , and a barrier film layer 700 are sequentially formed on one surface of the substrate layer 100 .

[0108] The pixel definition layer 500 includes at least a plurality of pixel opening areas 510 and a pixel definition area 520 . The auxiliary electrode layer 600 is disposed in the pixel definition area 520 . The barrier film layer 700 is disposed on a side of the auxiliary electrode layer 600 away from the pixel definition area 520 .

[0109] Through the above-mentioned manufacturing process, the barrier film layer 700 can be set on the auxiliary electrode layer 600, and the barrier film layer 700 cooperates with the pixel definition area 520 to surround the pixel opening area 510. During the manufacturing process, it can prevent water vapor from penetrating horizontally, thereby ensuring the smooth production of products and subsequent packaging processes.

[0110] In this embodiment, referring to FIG. 10 and FIG. 11 , the method for manufacturing the display panel 10 further includes:

[0111] S3: evaporating a light-emitting material layer 300 in the pixel opening area 510;

[0112] S4: evaporating a cathode layer 400 on a side of the light-emitting material layer 300 facing away from the substrate;

[0113] The evaporation angle α of the cathode layer 400 is greater than the evaporation angle β of the light-emitting material layer 300 .

[0114] Based on the above configuration, the cathode layer 400 can be deposited closer to the auxiliary electrode layer 600 than the light-emitting material layer 300 , so that the cathode layer 400 and the auxiliary electrode layer 600 overlap while a gap exists between them.

[0115] Referring to Figures 15, 16 and 17, first, a substrate layer 100, a driving circuit layer 900, an anode layer 200, a pixel definition layer 500 and a barrier film layer 700 are deposited; second, inorganic etching, metal etching and pixel definition layer 500 openings are performed at one time to produce all the openings, wherein the inorganic etching is formed by two layers of materials with different etching selectivities; third, the pixel definition layer 500 is etched to expose the anode layer 200; fourth, the light-emitting material layer 300 and the cathode layer 400 are evaporated and packaged; fifth, part of the light-emitting material layer 300, the cathode layer 400 and the packaging layer 1000 are etched by a photolithography process to form a first sub-pixel; sixth, the fifth and sixth steps in the above steps are repeated to produce the remaining pixels; seventh, inkjet printing and Thin Film Encapsulation (TFE) packaging are performed.

[0116] Referring to Figures 18, 19 and 20, first, a substrate layer 100, a driving circuit layer 900, an anode layer 200, a pixel definition layer 500 and a barrier film layer 700 are deposited; second, inorganic etching, metal etching and pixel definition layer 500 opening are performed to produce an opening, wherein the inorganic etching is formed by two layers of materials with different etching selectivities; third, the pixel definition layer 500 is etched to expose the anode layer 200; fourth, the light-emitting material layer 300 and the cathode layer 400 are evaporated and packaged; fifth, part of the light-emitting material layer 300, the cathode layer 400 and the packaging layer 1000 are etched by a photolithography process to form a first sub-pixel; sixth, steps 2 to 6 in the above steps are repeated to produce the remaining pixels; seventh, inkjet printing and packaging film packaging are performed.

[0117] The present application also provides a display device comprising the display panel 10 described in the above embodiment. Because the display device comprises the display panel 10 described in the above embodiment, the display device also possesses the functions and advantages of the display panel 10. The display device can be an electronic device with a display function, such as a mobile phone, a computer, or a tablet computer.

[0118] In this application, the structural embodiments and method embodiments may complement each other if they do not conflict.

[0119] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of their solutions) can be used in combination with each other. For example, those of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the application. This should not be interpreted as an intention that the features of an application that does not require protection are necessary for any claim. On the contrary, the subject matter of the present application may be less than all the features of the embodiments of a specific application. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present application should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.

[0120] This application describes exemplary embodiments with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown in this application, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0121] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0122] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The terms "plurality" and "several" refer to two or more, unless otherwise clearly defined.

[0123] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure of this application. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of this application are indicated by the following claims.

[0124] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate layer; A pixel definition layer, the pixel definition layer comprising a pixel opening area and a pixel definition area; an auxiliary electrode layer, the auxiliary electrode layer being disposed at one end of the pixel definition area away from the substrate layer; a cathode layer, a portion of which is disposed in the pixel opening region, and another portion of which extends to the pixel definition region and is electrically connected to the auxiliary electrode layer; The blocking film layer is arranged on the side of the auxiliary electrode layer away from the pixel definition area, and the surface of one end of the blocking film layer away from the substrate layer is farther away from the substrate layer than the surface of the cathode layer away from the substrate layer; the blocking film layer is arranged around the peripheral side of the pixel opening area.

2. The display panel according to claim 1, wherein: The barrier film layer includes a first barrier layer and a second barrier layer. The orthographic projection of the first barrier layer onto the substrate layer is located within the orthographic projection of the second barrier layer onto the substrate layer. The first barrier layer is closer to the substrate layer than the second barrier layer.

3. The display panel according to claim 2, wherein: The thickness of the first barrier layer is greater than or equal to 2 um.

4. The display panel according to claim 2, wherein: Along the thickness direction, the orthographic projection of the second barrier layer on the substrate layer and the orthographic projection of the pixel opening area do not overlap and there is a gap; Along the thickness direction, the orthographic projection of the second barrier layer on the substrate layer covers the orthographic projection of the auxiliary electrode layer on the substrate layer; Alternatively, along the thickness direction, the orthographic projection of the second blocking layer on the substrate layer falls within the orthographic projection of the auxiliary electrode layer on the substrate layer, and the maximum distance from the edge of the orthographic projection of the second blocking layer on the substrate layer to the edge of the orthographic projection of the auxiliary electrode layer on the substrate layer is less than or equal to 2um.

5. The display panel according to claim 2, wherein: The materials of the first barrier layer and the second barrier layer include metal and / or inorganic substances.

6. The display panel according to claim 5, wherein: The materials of the first barrier layer and the second barrier layer are both metal, or, The materials of the first barrier layer and the second barrier layer are both inorganic, or, The material of one of the first barrier layer and the second barrier layer is metal, and the material of the other is inorganic.

7. The display panel according to claim 1, wherein: The display panel also includes a light-emitting material layer, which includes a light-emitting unit, a portion of the structure of the light-emitting unit is located in the pixel opening area, and another portion of the structure of the light-emitting unit extends to the pixel definition area, and the light-emitting unit located in the pixel definition area and the auxiliary electrode layer are spaced apart, and the cathode layer is located in the gap between the light-emitting unit and the auxiliary electrode layer.

8. The display panel according to claim 7, wherein: The distance between the light emitting unit and the auxiliary electrode layer is greater than or equal to 0.5 um and less than or equal to 5 um.

9. The display panel according to claim 7, wherein: The light-emitting material layer further includes a separation unit, which is located on the auxiliary electrode layer and is spaced apart from the light-emitting unit.

10. The display panel according to claim 1, wherein: The display panel further includes an isolation layer, which is disposed between the pixel definition layer and the auxiliary electrode layer, and an orthographic projection of the isolation layer onto the substrate layer is located within an orthographic projection of the auxiliary electrode layer onto the substrate layer.

11. The display panel according to claim 10, wherein: A surface of the isolation layer at one end away from the substrate layer is farther away from the substrate layer than a surface of the barrier film layer at one end away from the substrate layer located in the thickness region.

12. The display panel according to claim 10, wherein: The material of the isolation layer includes metal and / or inorganic matter.

13. The display panel according to claim 1, wherein: The blocking film layer includes a second blocking layer, which is arranged on a side of the auxiliary electrode layer away from the pixel definition area, and the orthographic projection of the auxiliary electrode layer onto the substrate layer is located within the orthographic projection of the second blocking layer onto the substrate layer.

14. The display panel according to claim 13, wherein: The thickness of the auxiliary electrode layer is greater than or equal to 2 um.

15. A method for manufacturing a display panel, used for manufacturing the display panel according to any one of claims 1 to 14, characterized in that: include: providing a substrate layer; A pixel definition layer, an auxiliary electrode layer, and a barrier film layer are sequentially prepared on one side of the substrate layer. The pixel definition layer at least includes a plurality of pixel opening areas and a pixel definition area, the auxiliary electrode layer is arranged in the pixel definition area, and the barrier film layer is arranged on a side of the auxiliary electrode layer away from the pixel definition area.

16. The method for manufacturing a display panel according to claim 15, wherein: The display panel manufacturing method further includes: Evaporating a light-emitting material layer in the pixel opening area; Vapor depositing a cathode layer on a side of the light-emitting material layer facing away from the substrate; Wherein, the evaporation angle of the cathode layer is greater than the evaporation angle of the light-emitting material layer.

17. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1-14.

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