Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel comprises a substrate, a first electrode, a pixel definition layer, a light-emitting layer and a second electrode, and the first electrode is arranged on one side of the substrate; the pixel definition layer is arranged on one side of the substrate and covers the multiple first electrodes, the pixel definition layer is provided with pixel openings, the pixel openings expose the first electrodes, the part, located between every two adjacent pixel openings, of the pixel definition layer is a separation part, and the side, away from the substrate, of each separation part is provided with a first structure; the light-emitting layer comprises a first light-emitting part and a second light-emitting part which are connected, the first light-emitting part is arranged in the pixel opening and located on the side, away from the substrate, of the first electrode, and the second light-emitting part is arranged on the side, away from the substrate, of the separation part and at least covers part of the first structure; the second electrode covers one side, away from the substrate, of the light-emitting layer; the first structure comprises at least one convex part and / or at least one concave part. The display panel can weaken the phenomenon of secret lighting of the display panel, and the display effect is improved.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) have the advantages of low power consumption, fast response speed, and wide viewing angle. Currently, OLEDs are widely used in various electronic products. To further improve the efficiency and lifespan of OLEDs, tandem organic light-emitting diodes (Tandem OLEDs) have emerged.

[0003] Laminated organic light-emitting diodes (OLEDs) offer higher brightness, longer lifespan, and lower power consumption, and are currently experiencing strong market demand. However, because the common layer of a laminated OLED display panel is formed by full-surface vapor deposition, when the turn-on voltages of the red (R) / green (G) / blue (B) subpixels are close, the green subpixel will illuminate when energized. Simultaneously, electrons and holes migrate laterally, causing the adjacent red subpixel to illuminate, leading to a "smearing" effect on the display panel and affecting the display quality.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above technical problems. Utility Model Content

[0005] The purpose of the present application is to provide a display panel and a display device, which can reduce the brightness stealing phenomenon of the display panel and improve the display effect.

[0006] To solve the above problems, the technical solutions of this application are as follows:

[0007] In a first aspect, the present application proposes a display panel, comprising:

[0008] substrate;

[0009] a plurality of first electrodes, disposed on one side of the substrate;

[0010] a pixel definition layer disposed on one side of the substrate and covering the plurality of first electrodes; the pixel definition layer having a plurality of pixel openings, each of which exposes one of the first electrodes; a portion of the pixel definition layer located between two adjacent pixel openings being a separator; and a first structure being disposed on a side of the separator away from the substrate;

[0011] a light-emitting layer comprising a first light-emitting portion and a second light-emitting portion connected to each other, wherein the first light-emitting portion is disposed within the pixel opening and on a side of the first electrode away from the substrate, and the second light-emitting portion is disposed on a side of the partition away from the substrate and covers at least a portion of the first structure; and

[0012] a second electrode, covering a side of the light-emitting layer away from the substrate;

[0013] Wherein, the first structure includes at least one protrusion and / or at least one recess.

[0014] In one embodiment of the present application, the angle between the side wall of the pixel opening and the plane where the substrate is located is a first angle, and the angle between the side wall of the first structure and the plane where the substrate is located is a second angle, and the first angle is less than or equal to the second angle.

[0015] In one embodiment of the present application, the first structure includes at least two protrusions, the protrusions are provided on a side of the partition away from the substrate, and the at least two protrusions are spaced apart along an extension direction of two adjacent pixel openings;

[0016] Wherein, the angle between the side wall of the protrusion and the plane where the substrate is located is the second angle.

[0017] In one embodiment of the present application, the first structure includes at least two recessed portions, the depth of the recessed portions is less than the thickness of the partition, the recessed portions are provided on a side of the partition away from the substrate, and the at least two recessed portions are spaced apart along an extension direction of two adjacent pixel openings;

[0018] Wherein, the angle between the side wall of the recessed portion and the plane where the substrate is located is the second angle.

[0019] In one embodiment of the present application, a distance from a bottom wall of the recessed portion to a side of the substrate close to the pixel definition layer is less than a thickness of the first electrode.

[0020] In one embodiment of the present application, the first structure includes at least one recessed portion, the depth of the recessed portion is equal to the thickness of the partition, and the recessed portion exposes a portion of the substrate;

[0021] Wherein, the side wall of the recessed portion and the plane where the substrate is located form the second angle.

[0022] In one embodiment of the present application, the substrate includes:

[0023] substrate; and

[0024] a planar layer disposed on one side of the substrate, wherein the pixel definition layer and the plurality of first electrodes are disposed on a side of the planar layer away from the substrate;

[0025] Wherein, a concave portion is provided on a side of the flat layer away from the substrate, and the concave portion is communicated with the recessed portion.

[0026] In one embodiment of the present application, the angle between the sidewall of the concave portion and the plane where the substrate is located is the third angle, the angle between the sidewall of the recessed portion and the plane where the substrate is located is the second angle, and the angle between the sidewall of the pixel opening and the plane where the substrate is located is the first angle;

[0027] The first angle is less than or equal to the third angle.

[0028] In one embodiment of the present application, the second angle is less than or equal to the third angle.

[0029] In one embodiment of the present application, the third angle is less than or equal to the second angle.

[0030] In one embodiment of the present application, an orthographic projection of a sidewall of the recessed portion on the substrate is located outside an orthographic projection of a sidewall of the recessed portion on the substrate.

[0031] In one embodiment of the present application, the light-emitting layer includes:

[0032] a first sub-light-emitting layer comprising a first sub-light-emitting portion and a second sub-light-emitting portion connected to each other, wherein the first sub-light-emitting portion is disposed within the pixel opening and on a side of the first electrode away from the substrate, and the second sub-light-emitting portion is disposed on a side of the partition away from the substrate;

[0033] a second sub-light-emitting layer comprising a third sub-light-emitting portion and a fourth sub-light-emitting portion connected to each other, wherein the third sub-light-emitting portion is disposed within the pixel opening and located on a side of the first sub-light-emitting portion away from the substrate, and the fourth sub-light-emitting portion is disposed on a side of the second sub-light-emitting portion away from the substrate; and

[0034] a charge generation layer, disposed between the first sub-light-emitting layer and the second sub-light-emitting layer;

[0035] The first sub-light-emitting portion and the third sub-light-emitting portion form the first light-emitting portion, and the second sub-light-emitting portion and the fourth sub-light-emitting portion form the second light-emitting portion.

[0036] In the second aspect, the present application proposes a display device, including a display panel, which includes a substrate, multiple first electrodes, a pixel definition layer, a light-emitting layer and a second electrode, and the multiple first electrodes are arranged on one side of the substrate; the pixel definition layer is arranged on one side of the substrate and covers the multiple first electrodes, the pixel definition layer is provided with multiple pixel openings, each pixel opening exposes one first electrode, and the part of the pixel definition layer located between two adjacent pixel openings is a partition, and the side of the partition away from the substrate is provided with a first structure; the light-emitting layer includes a first light-emitting portion and a second light-emitting portion connected to each other, the first light-emitting portion is arranged in the pixel opening and located on the side of the first electrode away from the substrate, and the second light-emitting portion is arranged on the side of the partition away from the substrate and covers at least a part of the first structure; the second electrode covers the side of the light-emitting layer away from the substrate; the first structure includes at least one protrusion and / or at least one recess.

[0037] In the present application, the light-emitting layer of each light-emitting device includes a first light-emitting portion and a second light-emitting portion connected to each other. The first light-emitting portion is formed inside the pixel opening, and the second light-emitting portion is formed outside the pixel opening. Since the common layer of the display panel of the present application is formed by full-surface evaporation, the second light-emitting portions corresponding to the two sub-pixels in two adjacent sub-pixels will overlap or be connected. After overlapping or connecting, the second light-emitting portions of the two sub-pixels will form a leakage path, wherein, after one sub-pixel is lit, the carriers will be transmitted to the other sub-pixel through the leakage path, so that the adjacent sub-pixel is illuminated. The present application extends the leakage path between the two adjacent sub-pixels and reduces the leakage current between the two adjacent sub-pixels by setting a first structure in the partition between the two adjacent pixel openings and making the second light-emitting portion forming the leakage path cover at least a part of the first structure. Due to the reduction in leakage current, the brightness of the adjacent sub-pixels after being illuminated is also reduced, thereby reducing the phenomenon of stealing light and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of a first embodiment of a display panel of the present application;

[0039] Figure 2 is a flow chart of a method for manufacturing a display panel according to a first embodiment of the present application;

[0040] Figures 3A-3D is a schematic diagram of steps S11-S14 in the flowchart of the method for manufacturing the display panel of the first embodiment of the present application;

[0041] Figure 4 is a schematic diagram of a second embodiment of a display panel of the present application;

[0042] Figure 5 is a flow chart of a method for manufacturing a display panel according to a second embodiment of the present application;

[0043] Figures 6A-6F is a schematic diagram of steps S21-S26 in the flowchart of the method for manufacturing a display panel according to the second embodiment of the present application;

[0044] Figure 7 is a schematic diagram of a third embodiment of the display panel of the present application;

[0045] Figure 8 is a schematic diagram of a fourth embodiment of the display panel of the present application;

[0046] Figure 9 is a flow chart of a method for manufacturing a display panel according to a fourth embodiment of the present application;

[0047] Figures 10A-10D is a schematic diagram of steps S31-S34 in a flowchart of a method for manufacturing a display panel according to a fourth embodiment of the present application;

[0048] Figure 11 is another schematic diagram of the fourth embodiment of the display panel of the present application;

[0049] Figure 12 is a flow chart of another method for manufacturing the display panel of the fourth embodiment of the present application;

[0050] Figures 13A-13G It is a schematic diagram of steps S41-S47 in the flowchart of another manufacturing method of the fourth embodiment of the display panel of the present application. DETAILED DESCRIPTION

[0051] The meanings of the terms used in this specification and claims correspond to those commonly understood by persons of ordinary skill in the art to which this application belongs. The terms used in this specification and claims are intended solely to facilitate the description and understanding of this application and are not intended to limit this application to the narrow interpretations of the specific terms used in the specification and claims.

[0052] This application proposes a display device, which can be a mobile phone, tablet computer, e-reader, electronic display screen, laptop computer, mobile phone, augmented reality (AR) or virtual reality (VR) device, media player, wearable device, digital camera, car navigation system, etc. The display device includes a display panel 100.

[0053] The present application proposes a display panel 100 . The display panel 100 may be a single-layer organic light emitting diode (OLED) display panel 100 , or a tandem organic light emitting diode display panel 100 .

[0054] Optional, see Figure 1 The display panel 100 includes a substrate 10, a plurality of first electrodes 20, a pixel definition layer 30, a light-emitting layer 40, and a second electrode 50. The plurality of first electrodes 20 are disposed on one side of the substrate 10. The pixel definition layer 30 is disposed on one side of the substrate 10 and covers the plurality of first electrodes 20. The pixel definition layer 30 is provided with a plurality of pixel openings 31, each of which exposes one first electrode 20. The portion of the pixel definition layer 30 located between two adjacent pixel openings 31 is a separator 32, and a first structure 33 is provided on the side of the separator 32 away from the substrate 10.

[0055] Optionally, the light-emitting layer 40 includes a first light-emitting portion 41 and a second light-emitting portion 42 connected to each other. The first light-emitting portion 41 is disposed within the pixel opening 31 and is located on the side of the first electrode 20 away from the substrate 10. The second light-emitting portion 42 is disposed on the side of the partition 32 away from the substrate 10 and covers at least a portion of the first structure 33. The second electrode 50 covers the side of the light-emitting layer 40 away from the substrate 10.

[0056] In the present application, the light-emitting layer 40 of each light-emitting device includes a first light-emitting portion 41 and a second light-emitting portion 42 connected to each other. The first light-emitting portion 41 is formed inside the pixel opening 31, and the second light-emitting portion 42 is formed outside the pixel opening 31. Since the common layer of the display panel 100 of the present application is formed by evaporation, when the distance between two adjacent sub-pixels is small, the second light-emitting portions 42 corresponding to the two sub-pixels will overlap or connect. After the second light-emitting portions 42 of the two sub-pixels overlap or connect, a leakage path will be formed. After one sub-pixel is lit, the carriers will be transferred to the other sub-pixel through the leakage path, so that the adjacent sub-pixel is illuminated. The present application provides a first structure 33 in the partition 32 between the two adjacent pixel openings 31, and the second light-emitting portion 42 forming the leakage path at least covers a part of the first structure 33, thereby extending the leakage path between the two adjacent sub-pixels and reducing the leakage current between the two adjacent sub-pixels. Due to the reduction in leakage current, the brightness of the adjacent sub-pixels after being illuminated is also reduced, thereby reducing the phenomenon of stealing light and improving the display effect.

[0057] Optionally, each pixel opening 31 corresponds to a first light-emitting portion 41 and a second light-emitting portion 42 connected to the first light-emitting portion 41. The first light-emitting portion 41 and the second light-emitting portion 42 corresponding to each pixel opening 31 emit the same light color. During the process of forming the light-emitting layer 40, the first light-emitting portion 41 and the second light-emitting portion 42 are formed simultaneously. The first light-emitting portion 41 is the portion of the light-emitting layer 40 formed within the pixel opening 31 during the evaporation process, and the second light-emitting portion 42 is the portion of the light-emitting layer 40 formed outside the pixel opening 31 during the evaporation process.

[0058] Optionally, the display panel 100 of the present application further includes a plurality of light emitting devices, one of which is disposed in each pixel opening 31. The light emitting device includes a first electrode 20, a first light emitting portion 41, and a portion of the second electrode 50 located in the pixel opening 31.

[0059] It is understood that each light-emitting device is connected to a second light-emitting portion 42. When the second light-emitting portions 42 of two adjacent light-emitting devices overlap or connect, a leakage path is formed between the two adjacent light-emitting devices. The present application provides a first structure 33 between two adjacent light-emitting devices to extend the leakage path, reduce leakage current, and thus reduce the phenomenon of stealth lighting, thereby improving the display effect.

[0060] To avoid redundancy, an embodiment in which the second light-emitting portions 42 of two adjacent light-emitting devices are connected will be described later. The light-emitting colors of the two adjacent light-emitting devices may be the same or different, and the subsequent embodiments will not limit this.

[0061] Optionally, the first electrode 20 is an anode, and the second electrode 50 is a cathode, wherein the second electrode 50 is formed by laying out the entire surface.

[0062] Optionally, the first structure 33 includes at least one protrusion 33a and / or at least one recess 33b.

[0063] In one embodiment, the first structure 33 includes a raised portion 33a. In this embodiment, the second light-emitting portion 42 covers at least a portion of the raised portion 33a, thereby extending the leakage path between two adjacent sub-pixels and reducing leakage current between the two adjacent sub-pixels. Due to the reduced leakage current, the brightness of the adjacent sub-pixels after being illuminated also decreases, thereby reducing the phenomenon of stealth lighting and improving the display effect.

[0064] In one embodiment, the first structure 33 includes a recessed portion 33b. In this embodiment, the second light-emitting portion 42 at least partially covers the recessed portion 33b, thereby extending the leakage path between two adjacent sub-pixels and reducing leakage current between the two adjacent sub-pixels. Due to the reduced leakage current, the brightness of the adjacent sub-pixels after being illuminated also decreases, thereby reducing the phenomenon of stealth lighting and improving the display effect.

[0065] In one embodiment, the first structure 33 includes a raised portion 33a and a recessed portion 33b. In this embodiment, the second light-emitting portion 42 covers at least a portion of the raised portion 33a and the recessed portion 33b, thereby extending the leakage path between two adjacent sub-pixels and reducing leakage current between the two adjacent sub-pixels. Due to the reduced leakage current, the brightness of the adjacent sub-pixels after being illuminated also decreases, thereby reducing the phenomenon of stealth lighting and improving the display effect.

[0066] Optionally, the substrate 10 includes a base 11 and a planar layer 12. The planar layer 12 is disposed on one side of the base 11. The pixel definition layer 30 and the plurality of first electrodes 20 are disposed on a side of the planar layer 12 away from the base 11.

[0067] In this embodiment, the planarization layer 12 can improve the flatness of the film layer above it, thereby improving light extraction efficiency. The planarization layer 12 includes at least one planarization sublayer 12a. In some embodiments, the planarization layer 12 includes at least two planarization sublayers 12a, thereby further improving the flatness of the film layer above it.

[0068] Optionally, the substrate 11 is a hard substrate 11 , and the material of the substrate 11 includes glass.

[0069] Optionally, the substrate 11 is a flexible substrate 11 , and the material of the substrate 11 includes polyimide.

[0070] Optionally, the substrate 10 further includes a thin film transistor device layer. The thin film transistor device layer is located between the substrate 11 and the planar layer 12. The thin film transistor device layer includes a plurality of thin film transistors. The first electrode 20 passes through the planar layer 12 and is electrically connected to the thin film transistors.

[0071] Optionally, the light-emitting layer 40 includes a first sub-light-emitting layer 43 , a second sub-light-emitting layer 44 and a charge generation layer, and the charge generation layer is disposed between the first sub-light-emitting layer 43 and the second sub-light-emitting layer 44 .

[0072] The first sub-light emitting layer 43 includes a first sub-light emitting portion and a second sub-light emitting portion connected to each other. The first sub-light emitting portion is disposed within the pixel opening 31 and on the side of the first electrode 20 away from the substrate 10. The second sub-light emitting portion is disposed on the side of the partition 32 away from the substrate 10.

[0073] The second sub-light emitting layer 44 includes a third sub-light emitting portion and a fourth sub-light emitting portion connected to each other. The third sub-light emitting portion is disposed within the pixel opening 31 and is located on a side of the first sub-light emitting portion away from the substrate 10. The fourth sub-light emitting portion is disposed on a side of the second sub-light emitting portion away from the substrate 10.

[0074] The first and third sub-light-emitting portions form a first light-emitting portion 41 , and the second and fourth sub-light-emitting portions form a second light-emitting portion 42 .

[0075] In order to improve the luminous efficiency of the light-emitting device, the light-emitting device of this embodiment is a stacked light-emitting device including a plurality of light-emitting layers 40. The light-emitting layer 40 of each stacked light-emitting device includes at least two or more film layers. When the light-emitting layer 40 of the stacked light-emitting device is two layers, the first light-emitting layer 40 is the first sub-light-emitting layer 43, and the second light-emitting layer 40 is the second sub-light-emitting layer 44. The portion of the first sub-light-emitting layer 43 outside the pixel opening 31 is the second sub-light-emitting portion, and the portion of the second sub-light-emitting layer 44 outside the pixel opening 31 is the fourth sub-light-emitting portion. The second sub-light-emitting portion and the fourth sub-light-emitting portion at least cover a portion of the first structure 33. Therefore, when adjacent stacked light-emitting devices are connected or overlapped, the leakage path of the adjacent stacked light-emitting devices can be extended, the leakage current can be reduced, and the brightness of the adjacent sub-pixels after being illuminated is also reduced, thereby reducing the stealing phenomenon and improving the display effect.

[0076] In the present application, the light-emitting device may have a single-layer light-emitting layer 40 or a stacked structure of multiple light-emitting layers 40. To avoid redundancy, the following description will describe embodiments in which all light-emitting devices have multiple light-emitting layers 40. The light-emitting device may have a single-layer light-emitting layer 40 or multiple light-emitting layers 40, and the subsequent embodiments will not limit this.

[0077] Optionally, the angle between the sidewall of the pixel opening 31 and the plane of the substrate 10 is a first angle A1, the angle between the sidewall of the first structure 33 and the plane of the substrate 10 is a second angle A2, and the first angle A1 is less than or equal to the second angle A2.

[0078] In this embodiment, the magnitude of the first angle A1 is related to the microcavity structure of the light-emitting device. When the first angle A1 increases, the cavity length of the microcavity structure of the light-emitting device also increases, resulting in a decrease in the overall light extraction efficiency of the display panel 100. Therefore, the first angle A1 should not be set too large to avoid affecting the overall light extraction efficiency of the display panel 100.

[0079] The size of the second angle A2 is related to the leakage path. As the second angle A2 increases, the angle between the sidewall of the first structure 33 and the plane of the substrate 10 becomes steeper, and the length of the second light-emitting portion 42 formed on the surface of the first structure 33 also increases. This lengthens the leakage path between two adjacent light-emitting devices, reducing leakage current. The brightness of adjacent sub-pixels after being illuminated also decreases, thereby reducing the phenomenon of stealing light and improving the display effect.

[0080] Optionally, the first angle A1 and the second angle A2 are both smaller than 90 degrees.

[0081] See also Figure 1 , in the first embodiment of the present application:

[0082] Optionally, the first structure 33 includes at least two protrusions 33 a. The protrusions 33 a are provided on a side of the partition 32 away from the substrate 10. The at least two protrusions 33 a are spaced apart along the extending direction of two adjacent pixel openings 31.

[0083] In this embodiment, the design of the two protrusions 33a and the second light-emitting portion 42 at least covering part of the two protrusions 33a can further extend the leakage path between two adjacent light-emitting devices, thereby further reducing the leakage current, weakening the stealth phenomenon, and improving the display effect.

[0084] Optionally, the angle between the side wall of the protrusion 33 a and the plane where the substrate 10 is located is a second angle A2.

[0085] In this embodiment, the second angle A2 between the side wall of the protrusion 33a and the plane where the substrate 10 is located is increased so that the second angle A2 is greater than the first angle A1, which can further extend the leakage path between two adjacent light-emitting devices, reduce the stealth phenomenon, and improve the display effect.

[0086] It can be understood that in this embodiment, the second angle A2 can be the angle formed by the side of the protrusion 33a close to the adjacent pixel opening 31 and the plane where the substrate 10 is located, and the second angle A2 can also be the angle formed by the side of the protrusion 33a away from the adjacent pixel opening 31 and the plane where the substrate 10 is located, and no limitation is made here.

[0087] See also Figure 2 The method for manufacturing a display panel according to the first embodiment of the present application includes the following steps:

[0088] S11: Please refer to Figure 3A , a metal layer is formed on the substrate 10 , and the metal layer is patterned to form a plurality of first electrodes 20 .

[0089] S12: Please refer to Figure 3B A pixel definition layer 30 is formed on the substrate 10, the pixel definition layer 30 covers the plurality of first electrodes 20, and the pixel definition layer 30 is patterned to form a plurality of pixel openings 31 in the pixel definition layer 30, wherein each pixel opening 31 exposes one first electrode 20, and the angle between the sidewall of the pixel opening 31 and the plane of the substrate 10 is a first angle A1, and a portion of the pixel definition layer 30 located between two adjacent pixel openings 31 is a separator 32;

[0090] S13: Please refer to Figure 3CAn organic glue layer is formed on a side of the partition 32 away from the substrate 10, and the organic glue layer is patterned to form a first structure 33. The first structure 33 includes at least two raised portions 33a. The at least two raised portions 33a are spaced apart along the extension direction of two adjacent pixel openings 31. The angle between the sidewall of the raised portion 33a and the plane where the substrate 10 is located is a second angle A2, and the first angle A1 is smaller than the second angle A2.

[0091] S14: Please refer to Figure 3D A light-emitting layer 40 and a second electrode 50 are sequentially formed on the substrate 10, wherein the light-emitting layer 40 includes a first light-emitting portion 41 and a second light-emitting portion 42 connected to each other. The first light-emitting portion 41 is arranged in the pixel opening 31 and is located on the side of the first electrode 20 away from the substrate 10. The second light-emitting portion 42 is arranged on the side of the partition portion 32 away from the substrate 10 and covers at least a portion of the first structure 33.

[0092] See also Figure 4 , in the second embodiment of the present application:

[0093] Optionally, the first structure 33 includes at least two recessed portions 33b. The depth of the recessed portions 33b is less than the thickness of the partition 32. The recessed portions 33b are located on a side of the partition 32 away from the substrate 10. The at least two recessed portions 33b are spaced apart along the extension direction of two adjacent pixel openings 31. The angle between the sidewalls of the recessed portions 33b and the plane of the substrate 10 is a second angle A2.

[0094] In this embodiment, the design of the two recessed portions 33b and the second light-emitting portion 42 at least covering parts of the two recessed portions 33b can further extend the leakage path between two adjacent light-emitting devices, thereby further reducing the leakage current, weakening the stealth phenomenon, and improving the display effect.

[0095] Optionally, the distance from the bottom wall of the recessed portion 33 b to the side of the substrate 10 close to the pixel definition layer 30 is less than the thickness of the first electrode 20 .

[0096] In this embodiment, the depth of the recessed portion 33b can be further increased, thereby further extending the leakage path between two adjacent light-emitting devices, reducing leakage current, weakening the stealth phenomenon, and improving the display effect.

[0097] It can be understood that in this embodiment, the second angle A2 can be the angle formed by the side of the recessed portion 33b close to the adjacent pixel opening 31 and the plane where the substrate 10 is located, and the second angle A2 can also be the angle formed by the side of the recessed portion 33b away from the adjacent pixel opening 31 and the plane where the substrate 10 is located, and no limitation is made here.

[0098] See also Figure 5The manufacturing method of the display panel of the second embodiment of the present application includes the following steps:

[0099] S21: Please refer to Figure 6A , a metal layer is formed on the substrate 10 , and the metal layer is patterned to form a plurality of first electrodes 20 .

[0100] S22: Please refer to Figure 6B A pixel definition layer 30 is formed on the substrate 10, and the pixel definition layer 30 covers the multiple first electrodes 20. The pixel definition layer 30 is patterned to form multiple pixel openings 31 in the pixel definition layer 30, and each pixel opening 31 exposes one first electrode 20. The angle between the sidewall of the pixel opening 31 and the plane of the substrate 10 is a first angle A1, and the portion of the pixel definition layer 30 located between two adjacent pixel openings 31 is a separator 32.

[0101] S23: Please refer to Figure 6C A sacrificial layer 60 is formed on the substrate 10 , the sacrificial layer 60 covers the first electrode 20 and the partition 32 , and the sacrificial layer is patterned to form at least two exposure holes 61 in the sacrificial layer 60 , the exposure holes exposing a portion of the partition 32 .

[0102] S24: Please refer to Figure 6D , the portion of the partition 32 exposed to the exposure hole 61 is patterned to form a first structure 33, the first structure 33 includes at least two recessed portions 33b, the depth of the recessed portion 33b is less than the thickness of the partition 32, at least two recessed portions 33b are spaced apart along the extension direction of two adjacent pixel openings 31, and the angle between the side wall of the recessed portion 33b and the plane where the substrate 10 is located is a second angle A2, and the first angle A1 is less than the second angle A2.

[0103] S25: Please refer to Figure 6E , and remove the remaining portion of the sacrificial layer 60 by etching.

[0104] S26: Please refer to Figure 6F A light-emitting layer 40 and a second electrode 50 are sequentially formed on the substrate 10, wherein the light-emitting layer 40 includes a first light-emitting portion 41 and a second light-emitting portion 42 connected to each other. The first light-emitting portion 41 is arranged in the pixel opening 31 and is located on the side of the first electrode 20 away from the substrate 10. The second light-emitting portion 42 is arranged on the side of the partition portion 32 away from the substrate 10 and covers at least a portion of the first structure 33.

[0105] The material of the sacrificial layer 60 may be indium zinc oxide (IZO).

[0106] See also Figure 7 , in the third embodiment of the present application:

[0107] In order to avoid redundancy, the third embodiment of the present application will describe parts different from the second embodiment of the present application.

[0108] The third embodiment of the present application is different from the second embodiment of the present application in that:

[0109] Optionally, the first structure 33 includes at least one recessed portion 33 b. The depth of the recessed portion 33 b is equal to the thickness of the partition 32. The recessed portion 33 b exposes a portion of the substrate 10.

[0110] In this embodiment, by increasing the depth of the recessed portion 33 b , the leakage path between two adjacent light-emitting devices is further extended, thereby reducing leakage current, weakening the stealth phenomenon, and improving the display effect.

[0111] Optionally, the first structure 33 includes at least two recessed portions 33 b , and the at least two recessed portions 33 b are spaced apart along the extending direction of two adjacent pixel openings 31 .

[0112] In this embodiment, by increasing the number of recessed portions 33 b , the leakage path between two adjacent light-emitting devices is further extended, thereby reducing leakage current, alleviating the phenomenon of stealth lighting, and improving display effects.

[0113] The manufacturing method of the third embodiment of the present application differs from the manufacturing method of the second embodiment of the present application in that:

[0114] In step S23 , the first structure 33 includes at least one recessed portion 33 b , and the depth of the recessed portion 33 b is equal to the thickness of the partition 32 .

[0115] See also Figure 8 , in the fourth embodiment of the present application:

[0116] In order to avoid redundancy, the fourth embodiment of the present application will describe parts that are different from the third embodiment of the present application.

[0117] The fourth embodiment of the present application is different from the third embodiment of the present application in that:

[0118] Optionally, a concave portion 12 b is provided on a side of the flat layer 12 away from the substrate 11 , and the concave portion 12 b is communicated with the recessed portion 33 b .

[0119] Since substrate 10 includes a base 11 and a planar layer 12, recess 33b exposes a portion of planar layer 12. To further extend the leakage path between two adjacent light-emitting devices, this embodiment provides recess 12b on the portion of planar layer 12 exposed by recess 33b, and recess 12b communicates with recess 33b. Second light-emitting portion 42 at least partially covers recess 33b and recess 12b, thereby extending the leakage path between the two adjacent light-emitting devices, reducing leakage current, mitigating the phenomenon of "stealth lighting," and improving display quality.

[0120] Optionally, the orthographic projection of the sidewall of the recess 33b on the substrate 11 is located outside the orthographic projection of the sidewall of the recess 12b on the substrate 11. To avoid the formation of an undercut structure between the recess 12b and the recess 33b, which would result in the common layer covering the recess 33b and the recess 12b being cut off, in this embodiment, the orthographic projection of the sidewall of the recess 12b on the substrate 11 is located within the range of the orthographic projection of the sidewall of the recess 33b on the substrate 11. This prevents the charge generation layer and the second electrode 50 in the stacked light-emitting device from being cut off in the recess 12b, thereby improving the overall luminous efficiency of the display panel 100.

[0121] Optionally, the angle between the sidewall of the recess 12b and the plane of the substrate 11 is a third angle A3, the angle between the sidewall of the recess 33b and the plane of the substrate 11 is a second angle A2, and the angle between the sidewall of the pixel opening 31 and the plane of the substrate 11 is a first angle A1. The first angle A1 is less than or equal to the third angle A3.

[0122] In this embodiment, the third angle A3 between the sidewall of the recess 12b and the plane of the substrate 11 is increased so that the third angle A3 is greater than the first angle A1, which can further extend the leakage path between two adjacent light-emitting devices, reduce the stealing phenomenon, and improve the display effect.

[0123] It can be understood that in this embodiment, the third angle A3 can be the angle formed by the side of the recess 12b close to the adjacent pixel opening 31 and the plane where the substrate 11 is located, and the third angle A3 can also be the angle formed by the side of the recess 12b away from the adjacent pixel opening 31 and the plane where the substrate 11 is located, and no limitation is made here.

[0124] Optional, see Figure 8 , the second angle A2 is less than or equal to the third angle A3. This embodiment can further extend the leakage path between two adjacent light-emitting devices, reduce the phenomenon of stealing light, and improve the display effect.

[0125] See also Figure 9 A manufacturing method of the fourth embodiment of the present application includes the following steps:

[0126] S31: Please refer to Figure 10A A flat layer 12 is formed on the substrate 11, and the flat layer 12 includes at least one flat sublayer 12a. The flat layer 12 is patterned to form a recess 12b on a side of the flat layer 12 away from the substrate 11. The angle between the sidewall of the recess 12b and the plane of the substrate 11 is a third angle A3.

[0127] S32: Please refer to Figure 10B A metal layer is formed on the planar layer 12 , and the metal layer is patterned to form a plurality of first electrodes 20 disposed on the planar layer 12 .

[0128] S33: See Figure 10C A pixel definition layer 30 is formed on the planar layer 12, and the pixel definition layer 30 covers the plurality of first electrodes 20. The pixel definition layer 30 is patterned to form a plurality of pixel openings 31 in the pixel definition layer 30, wherein each pixel opening 31 exposes one first electrode 20, and an angle between a sidewall of the pixel opening 31 and a plane where the substrate 11 is located is a first angle A1. A portion of the pixel definition layer 30 located between two adjacent pixel openings 31 is a separator 32, and a side of the separator 32 away from the planar layer 12 is patterned to form a first structure 33. The first structure 33 includes at least one recessed portion 33b, a depth of the recessed portion 33b being equal to a thickness of the separator 32, the recessed portion 33b being connected to the recess 12b, and an angle between a sidewall of the recessed portion 33b and the plane where the substrate 11 is located is a second angle A2, the first angle A1 is less than or equal to the second angle A2, the first angle A1 is less than or equal to the third angle A3, and the second angle A2 is less than or equal to the third angle A3.

[0129] S34: See Figure 10D A light-emitting layer 40 and a second electrode 50 are sequentially formed on the flat layer 12, wherein the light-emitting layer 40 includes a first light-emitting portion 41 and a second light-emitting portion 42 connected to each other. The first light-emitting portion 41 is arranged in the pixel opening 31 and is located on the side of the first electrode 20 away from the flat layer 12. The second light-emitting portion 42 is arranged on the side of the partition portion 32 away from the flat layer 12 and covers at least a portion of the first structure 33.

[0130] In this production method, the production steps are fewer, which can improve production efficiency and reduce production costs.

[0131] Optional, see Figure 11 , the third angle A3 is less than or equal to the second angle A2. This embodiment can further extend the leakage path between two adjacent light-emitting devices, reduce the phenomenon of stealing light, and improve the display effect.

[0132] See also Figure 12 Another manufacturing method of the fourth embodiment of the present application includes the following steps:

[0133] S41: Please refer to Figure 13A A flat layer 12 is formed on the substrate 11, and the flat layer 12 includes at least one flat sublayer 12a. The flat layer 12 is patterned to form a recess 12b on a side of the flat layer 12 away from the substrate 11. The angle between the sidewall of the recess 12b and the plane of the substrate 11 is a third angle A3.

[0134] S42: Please refer to Figure 13B , a metal layer is formed on the flat layer 12, and the metal layer is patterned to form a plurality of first electrodes 20 disposed on the flat layer.

[0135] S43: Please refer to Figure 13C A pixel definition layer 30 is formed on the flat layer 12, and the pixel definition layer 30 covers the multiple first electrodes 20. The pixel definition layer 30 is patterned to form multiple pixel openings 31 in the pixel definition layer 30, and each pixel opening 31 exposes one first electrode 20. The angle between the sidewall of the pixel opening 31 and the plane where the substrate 11 is located is a first angle A1, and the first angle A1 is less than or equal to the third angle A3. The portion of the pixel definition layer 30 located between two adjacent pixel openings 31 is a separator 32.

[0136] S44: See Figure 13D A sacrificial layer 60 is formed on the planar layer 12 , the sacrificial layer 60 covers the first electrode 20 and the partition 32 , and the sacrificial layer 60 is patterned to form an exposure hole 61 in the sacrificial layer 60 , which exposes at least a portion of the partition 32 .

[0137] S45: Please refer to Figure 13E , the portion of the partition 32 exposed to the exposure hole 61 is patterned to form a first structure 33, the first structure 33 includes at least one recessed portion 33b, the depth of the recessed portion 33b is equal to the thickness of the partition 32, the recessed portion 33b is connected to the recess 12b, and the angle between the side wall of the recessed portion 33b and the plane where the substrate 11 is located is the second angle A2, the first angle A1 is less than or equal to the second angle A2, and the third angle A3 is less than or equal to the second angle A2.

[0138] S46: Please refer to Figure 13F , and remove the remaining portion of the sacrificial layer 60 by etching.

[0139] S47: Please refer to Figure 13GA light-emitting layer 40 and a second electrode 50 are sequentially formed on the flat layer 12, wherein the light-emitting layer 40 includes a first light-emitting portion 41 and a second light-emitting portion 42 connected to each other. The first light-emitting portion 41 is arranged in the pixel opening 31 and is located on the side of the first electrode 20 away from the flat layer 12. The second light-emitting portion 42 is arranged on the side of the partition portion 32 away from the flat layer 12 and covers at least a portion of the first structure 33.

[0140] In this manufacturing method, although the process of sacrificial layer 60 is added, the process design of sacrificial layer 60 can make the size of second angle A2 controllable to adapt to different product requirements. The material of sacrificial layer 60 can be indium zinc oxide (IZO).

[0141] The above describes in detail the specific embodiments of the present application. The above embodiments disclosed in this application are merely preferred embodiments of the present application. Those skilled in the art will appreciate that many variations and improvements can be made without departing from the spirit of the present application. These variations and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A display panel, characterized in that: include: substrate; a plurality of first electrodes, disposed on one side of the substrate; a pixel definition layer disposed on one side of the substrate and covering the plurality of first electrodes; the pixel definition layer having a plurality of pixel openings, each of which exposes one of the first electrodes; a portion of the pixel definition layer located between two adjacent pixel openings being a separator; and a first structure being disposed on a side of the separator away from the substrate; a light-emitting layer comprising a first light-emitting portion and a second light-emitting portion connected to each other, wherein the first light-emitting portion is disposed within the pixel opening and on a side of the first electrode away from the substrate, and the second light-emitting portion is disposed on a side of the partition away from the substrate and covers at least a portion of the first structure; as well as a second electrode, covering a side of the light-emitting layer away from the substrate; Wherein, the first structure includes at least one protrusion and / or at least one recess.

2. The display panel according to claim 1, wherein The angle between the sidewall of the pixel opening and the plane where the substrate is located is a first angle, the angle between the sidewall of the first structure and the plane where the substrate is located is a second angle, and the first angle is less than or equal to the second angle.

3. The display panel according to claim 2, wherein: The first structure includes at least two protrusions, the protrusions are provided on a side of the partition away from the substrate, and the at least two protrusions are spaced apart along an extension direction of two adjacent pixel openings; Wherein, the angle between the side wall of the protrusion and the plane where the substrate is located is the second angle.

4. The display panel according to claim 2, wherein: The first structure includes at least two recessed portions, the depth of the recessed portions being smaller than the thickness of the partition portion, the recessed portions being provided on a side of the partition portion away from the substrate, and the at least two recessed portions being spaced apart along an extension direction of two adjacent pixel openings; Wherein, the angle between the side wall of the recessed portion and the plane where the substrate is located is the second angle.

5. The display panel according to claim 4, wherein: The distance from the bottom wall of the recessed portion to a side of the substrate close to the pixel definition layer is less than the thickness of the first electrode.

6. The display panel according to claim 2, wherein: The first structure includes at least one recessed portion, the depth of the recessed portion is equal to the thickness of the partition, and the recessed portion exposes a portion of the substrate; Wherein, the side wall of the recessed portion and the plane where the substrate is located form the second angle.

7. The display panel according to claim 6, wherein: The substrate comprises: substrate; and a planar layer disposed on one side of the substrate, wherein the pixel definition layer and the plurality of first electrodes are disposed on a side of the planar layer away from the substrate; Wherein, a concave portion is provided on a side of the flat layer away from the substrate, and the concave portion is communicated with the recessed portion.

8. The display panel according to claim 7, wherein: The angle between the sidewall of the concave portion and the plane where the substrate is located is a third angle, the angle between the sidewall of the recessed portion and the plane where the substrate is located is the second angle, and the angle between the sidewall of the pixel opening and the plane where the substrate is located is the first angle; The first angle is less than or equal to the third angle.

9. The display panel according to claim 8, wherein: The second angle is less than or equal to the third angle.

10. The display panel according to claim 8, wherein The third angle is less than or equal to the second angle.

11. The display panel according to any one of claims 7 to 10, wherein: An orthographic projection of a side wall of the recessed portion on the substrate is located outside an orthographic projection of a side wall of the recessed portion on the substrate.

12. The display panel according to any one of claims 1 to 10, wherein: The light-emitting layer includes: a first sub-light-emitting layer comprising a first sub-light-emitting portion and a second sub-light-emitting portion connected to each other, wherein the first sub-light-emitting portion is disposed within the pixel opening and on a side of the first electrode away from the substrate, and the second sub-light-emitting portion is disposed on a side of the partition away from the substrate; a second sub-light-emitting layer comprising a third sub-light-emitting portion and a fourth sub-light-emitting portion connected to each other, wherein the third sub-light-emitting portion is disposed within the pixel opening and located on a side of the first sub-light-emitting portion away from the substrate, and the fourth sub-light-emitting portion is disposed on a side of the second sub-light-emitting portion away from the substrate; and a charge generation layer, disposed between the first sub-light-emitting layer and the second sub-light-emitting layer; The first sub-light-emitting portion and the third sub-light-emitting portion form the first light-emitting portion, and the second sub-light-emitting portion and the fourth sub-light-emitting portion form the second light-emitting portion.

13. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 12.

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