Display panel, its manufacturing method, and display device

Abstract

This disclosure provides a display panel, its manufacturing method, and a display device, belonging to the field of display technology. The display panel includes a display substrate and a drainage structure. The display substrate includes a display area and a first peripheral area located at the edge of the display area. The drainage structure is located on a first surface of the display substrate. The drainage structure includes multiple first cluster structures located in the first peripheral area. The multiple first cluster structures are arranged around the display area. Each first cluster structure has a first collection groove, and each first cluster structure includes multiple first rib structures arranged circumferentially along the first collection groove. The multiple first rib structures are configured to guide droplets to the first collection groove surrounded by the multiple first rib structures. This disclosure can improve the poor connection path formed by larger droplets due to random migration or aggregation of droplets on the drainage structure after drying, preventing external water and oxygen from entering the display panel through the connection path and affecting the encapsulation effect.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] Display devices have a wide range of applications in daily life, such as mobile phones, tablets, and other electronic devices. The display panel is an important component of display devices.

[0003] In related technologies, a display panel includes a display substrate and a flow-guiding structure. The display substrate includes a display area and a peripheral area, with the peripheral area surrounding the display area. The flow-guiding structure is located in the peripheral area. The flow-guiding structure includes multiple parallel blocking structures and a collection groove located between the multiple blocking structures. The extending direction of the blocking structures is parallel to the extending direction of the edge of the display area.

[0004] However, droplets (such as ink from luminescent materials) falling on multiple parallel baffles may migrate and aggregate randomly, forming larger droplets. After drying, these droplets may form connecting pathways through which external water and oxygen can enter the display panel, affecting the encapsulation effect of the display panel. Summary of the Invention

[0005] This disclosure provides a display panel, a method for manufacturing the same, and a display device, which can improve the encapsulation effect of the display panel. The technical solution is as follows:

[0006] On one hand, a display panel is provided, the display panel including a display substrate and a drainage structure, the display substrate including a display area and a first peripheral area located at the edge of the display area, the drainage structure being located on a first surface of the display substrate; the drainage structure including a plurality of first cluster structures located in the first peripheral area, the plurality of first cluster structures being arranged around the display area, each of the first cluster structures having a first collection groove, and the first cluster structure including a plurality of first rib structures arranged circumferentially along the first collection groove, the plurality of first rib structures being configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures.

[0007] Optionally, each of the first rib structures has a first end close to the first collection groove and a second end away from the first collection groove, and the distance between two adjacent first rib structures in the circumferential direction gradually increases in the direction from the first end to the second end.

[0008] Optionally, in at least one of the first cluster structures, the first ends of the plurality of first rib structures are connected.

[0009] Optionally, the plurality of first cluster structures are divided into at least two first cluster structure groups, the at least two first cluster structure groups are arranged along a direction away from the display area, and the plurality of first cluster structures in each first cluster structure group are arranged sequentially along the circumference of the display area.

[0010] Optionally, the plurality of first cluster structures are arranged sequentially along the circumference of the display area.

[0011] Optionally, the patterns formed by sequentially connecting the multiple second ends of each of the first cluster structures are the same; or, at least two of the multiple first cluster structures form different patterns by sequentially connecting the multiple second ends of each of the first cluster structures.

[0012] Optionally, the plurality of first cluster structures include a first target rib structure and a second target rib structure, wherein the distance between the first cluster structure group to which the first target rib structure belongs and the display area is less than the distance between the first cluster structure group to which the second target rib structure belongs and the display area; and the length of the first target rib structure is different from the length of the second target rib structure.

[0013] Optionally, the spacing between two adjacent first cluster structures is 2 μm to 8 μm.

[0014] Optionally, the diameter of the first collection tank is 1 mm to 10 mm, and the depth of the first collection tank is 0.5 μm to 5 μm.

[0015] Optionally, the first rib structure has a top surface away from the first surface, the first rib structure has at least one first cross section, the first cross section is parallel to the first surface, and the width of the top surface is greater than the width of the first cross section.

[0016] Optionally, the length of the first rib structure is 10 μm to 500 μm.

[0017] Optionally, the display substrate includes a substrate, a driving circuit layer, and a light-emitting functional layer stacked sequentially, wherein the driving circuit layer and the light-emitting functional layer are both located in the display area, wherein the driving circuit layer includes a source-drain layer, and the first rib structure is on the same layer as the source-drain layer.

[0018] Optionally, the light-emitting functional layer includes a first electrode layer, a light-emitting layer, and a second electrode layer sequentially stacked on the first surface; wherein the light-emitting layer is an organic light-emitting layer, or the light-emitting layer is a quantum dot light-emitting layer.

[0019] Optionally, the drainage structure further includes a hydrophobic film located on the side of the plurality of first cluster structures away from the first surface.

[0020] Optionally, the display substrate further includes at least one opening area and at least one second peripheral area, the display area surrounds the at least one opening area, the at least one second peripheral area corresponds one-to-one with the at least one opening area, and the at least one second peripheral area is located between the at least one opening area and the display area; the drainage structure further includes a plurality of second cluster structures, the plurality of second cluster structures are located in the at least one second peripheral area, the plurality of second cluster structures are arranged around the at least one opening area, each second cluster structure has a second collection groove, and the second cluster structure includes a plurality of second rib structures arranged circumferentially along the second collection groove, the plurality of second rib structures are configured to guide droplets to the second collection groove surrounded by the plurality of second rib structures.

[0021] On the other hand, a method for manufacturing a display panel is provided, the method comprising: providing a display substrate, the display substrate including a display area and a first peripheral area located at the edge of the display area; and fabricating a drainage structure on a first surface of the display substrate; wherein the drainage structure includes a plurality of first cluster structures located in the first peripheral area, the plurality of first cluster structures being arranged around the display area, each first cluster structure having a first collection groove, and the first cluster structure including a plurality of first rib structures arranged circumferentially along the first collection groove, the plurality of first rib structures being configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures.

[0022] In another aspect, a display device is provided, the display device including a power supply circuit and any of the aforementioned display panels, wherein the power supply circuit supplies power to the display panel.

[0023] The beneficial effects of the technical solution provided in this disclosure include at least the following: by setting a drainage structure comprising multiple first cluster structures in the first peripheral area, the first cluster structure includes a first collection groove and multiple first rib structures arranged circumferentially along the first collection groove, and the multiple first rib structures are configured to guide droplets to the first collection groove surrounded by the multiple first rib structures. Therefore, droplets falling into the first peripheral area will flow towards the first collection groove along the aggregation direction of the multiple first rib structures, thereby preventing the droplets in the first peripheral area from being connected to the droplets in the display area. After drying, there is no connection path between the two, preventing external water and oxygen from entering the interior of the display panel through the connection path and affecting the encapsulation effect of the display panel. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a planar structure of a display panel provided in an embodiment of this disclosure;

[0026] Figure 2 This is a schematic cross-sectional view of a display panel provided in an embodiment of this disclosure;

[0027] Figure 3 This is a schematic diagram of a planar structure of a first cluster-like structure provided in an embodiment of this disclosure;

[0028] Figure 4 This is a schematic diagram of another planar structure of the first cluster structure provided in this embodiment of the present disclosure;

[0029] Figure 5 This is a partially enlarged schematic diagram of a first cluster structure provided in an embodiment of this disclosure;

[0030] Figure 6 This is a schematic diagram of a droplet falling above a first rib structure according to an embodiment of the present disclosure;

[0031] Figure 7 This is a schematic cross-sectional view of the first rib structure provided in an embodiment of this disclosure;

[0032] Figure 8 This is a schematic diagram of the arrangement of a first cluster structure provided in an embodiment of this disclosure;

[0033] Figure 9 This is a schematic diagram of another display panel planar structure and a schematic diagram of the corresponding arrangement of the first cluster structure provided in this embodiment of the present disclosure;

[0034] Figure 10 This is a schematic diagram of another display panel planar structure and a schematic diagram of the corresponding arrangement of the first cluster structure provided in this embodiment of the present disclosure;

[0035] Figure 11 This is a schematic diagram of the planar structure of two adjacent first cluster structures provided in an embodiment of this disclosure;

[0036] Figure 12 This is a schematic cross-sectional view of another display panel provided in an embodiment of this disclosure;

[0037] Figure 13This is a schematic cross-sectional view of the display area of ​​another display panel provided in this embodiment of the present disclosure;

[0038] Figure 14 This is a schematic diagram of another planar structure of a display panel provided in an embodiment of this disclosure;

[0039] Figure 15 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this disclosure;

[0040] Figure 16 This is a schematic diagram of a method for fabricating a light-emitting layer using a full-coverage coating technique, as provided in an embodiment of this disclosure.

[0041] Legend:

[0042] 1. Display substrate 11. Display area 12. First peripheral area 13. Opening area 14. Second peripheral area A. First surface

[0043] 2. Drainage structure 20a, first cluster structure group 20, first cluster structure 201, first rib structure 202, first collection groove 201a, first end 201b, second end 201c, top surface 201d, first cross section 21, second cluster structure 2011, first target rib structure 2012, second target rib structure

[0044] 3. Driving circuit layer 301, light-shielding layer 302, first gate layer 303, second gate layer 304, third gate layer 305, first source-drain layer 306, second source-drain layer 307, first semiconductor layer 308, second semiconductor layer 309, buffer layer 310, first gate insulating layer 311, first insulating layer 312, second gate insulating layer 313, third gate insulating layer 314, interlayer dielectric layer 315, passivation layer 316, first planarization layer 317, second planarization layer

[0045] 4. Light-emitting functional layer; 41. First electrode layer; 42. Light-emitting layer; 43. Second electrode layer; 44. Pixel definition layer; 5. Encapsulation layer; 6. Color conversion layer; 7. Color filter layer; 8. Substrate. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0047] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar words used in the patent application specification and claims of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “an” and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar words mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, but do not exclude other elements or objects. The directional terms mentioned in this disclosure, such as "top," "bottom," "upper," "lower," "left," or "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this disclosure, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0048] Figure 1 This is a schematic diagram of the planar structure of a display panel provided in an embodiment of this disclosure. For example... Figure 1 As shown, the display panel includes a display substrate 1 and a flow-guiding structure 2. The display substrate 1 includes a display area 11 and a peripheral area 12 located at the edge of the display area 11, and the flow-guiding structure 2 is located in the first peripheral area 12. The flow-guiding structure 2 includes a plurality of first cluster structures 20, which are arranged around the display area 11.

[0049] Figure 2 This is a schematic cross-sectional view of a display panel provided in an embodiment of this disclosure. Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure at the BB section line, as shown below. Figure 2 As shown, the drainage structure 2 is located on the first surface A of the display substrate.

[0050] Figure 3 This is a schematic diagram of a planar structure of a first cluster structure provided in an embodiment of this disclosure, and Figure 3 yes Figure 1 A magnified view of a portion of the first cluster structure. Combined with... Figures 1 to 3 Each first cluster structure 20 has a first collection groove 202, and the first cluster structure 20 includes a plurality of first rib structures 201 arranged circumferentially along the first collection groove 202, the plurality of first rib structures 201 being configured to guide droplets to the first collection groove 202 surrounded by the plurality of first rib structures 201.

[0051] The droplets here can be ink from the light-emitting layer material. The display area 11 includes an array of sub-pixel regions. Since at least part of the film structure in the light-emitting layer can be shared by multiple sub-pixels, these films are usually formed by full coating, such as coating the first surface with ink. Therefore, there may be cases where droplets fall into the first peripheral area 12.

[0052] Since the first rib structure 201 can guide the droplets to the first collection tank 202 surrounded by multiple first rib structures 201, the droplets located in the first collection tank 202 are disconnected from the droplets located in the display area 11. There is no connection between the dried droplets located in the first collection tank 202 and the dried droplets located in the display area 11, so the encapsulation effect is better.

[0053] It should be noted that, Figure 3 To clearly demonstrate more of the structure, Figure 3 The first collection tank 202 in the middle is not connected to Figure 1 or Figure 2 The feature of dried droplets gathering in the first collection tank 202 is indicated by black filling.

[0054] The structure of a first cluster structure 20 is described below.

[0055] In this embodiment of the disclosure, such as Figure 3 As shown, each first rib structure 201 has a first end 201a near the first collection tank 202 and a second end 201b away from the first collection tank. In the direction from the first end 201a to the second end 201b, the distance between two adjacent first rib structures in the circumferential direction gradually increases. Therefore, the droplets above the first rib structure 201 are subjected to unbalanced forces, achieving dynamic migration. The droplets falling into the first peripheral area 12 migrate along the circumferentially arranged first rib structures 201 in the direction of aggregation of the first rib structures 201 (i.e., from the second end 201b to the first end 201a) and flow into the first collection tank 202, thereby separating the droplets located in the display area 11 from those located in the first peripheral area 12.

[0056] In such Figure 3 In the first cluster structure 20 shown, the first ends 201a of the multiple first rib structures 201 are not connected, so there are gaps on the side wall of the first collection tank 202. However, due to the surface tension of the droplets, the droplets flowing into the first collection tank 202 will not flow out through these gaps.

[0057] In the actual fabrication process, the first cluster structure 20 is typically fabricated using a series of steps including deposition, photoresist coating, exposure, development, etching, and stripping. However, due to limitations in process precision, the fabrication process... Figure 3In the first cluster structure shown, the first ends 201a of the multiple first rib structures 201 are actually mostly continuous, that is, there are almost no gaps on the side wall of the first collection tank 202, and the droplets flowing into the first collection tank 202 will not flow out through the side wall of the first collection tank 202.

[0058] Figure 4 This is a schematic diagram of a planar structure of another first cluster structure provided in an embodiment of this disclosure. For example... Figure 4 As shown, in a first cluster structure 20, the first ends 201a of multiple first rib structures 201 are connected. That is, the sidewall of the formed first collection tank 202 has no gaps, further ensuring that the droplets flowing into the first collection tank 202 will not leak from the sidewall of the first collection tank 202.

[0059] Therefore, when the first cluster structure is Figure 3 or Figure 4 In the illustrated embodiment, the droplets in each of the first collection tanks 202 are not interconnected before the droplets dry. Therefore, the solutes in the dried droplets in each of the first collection tanks 202 are also isolated from each other, which can play a good role in preventing water and oxygen. If the aforementioned adsorption treatment is added before the droplets dry or the aforementioned wiping treatment is added after the droplets dry, the residual amount of solute in the droplets can be further reduced, thereby further enhancing the water and oxygen barrier effect.

[0060] Figure 5 This is a partially enlarged schematic diagram of a first cluster structure provided in an embodiment of this disclosure. Figure 6 This is a schematic diagram illustrating a droplet falling above a first rib structure, as provided in an embodiment of this disclosure. Figure 5 and Figure 6 As shown, the first rib structure 201 has a top surface 201c away from the first surface A, and at least one first cross-section 201d parallel to the first surface A. The width D of the top surface 201c is greater than the width of the first cross-section. This design of a wider top surface 201c and a narrower first cross-section 201d creates a larger gap below the top surface 201c. When a droplet D falls onto the first rib structure 201, the enclosed air E in this gap supports the droplet above the first rib structure 201, preventing it from falling to the bottom of the gap between two adjacent first rib structures 201 and being drawn into the first collection tank 202. Here, the enclosed air E can also be referred to as an air column.

[0061] For example, such as Figure 5As shown, within a first cluster structure, the included angle Φ formed by two adjacent first rib structures 201 satisfies the following relationship with the width D of the top surface: Φ < 0.12D + 0.3, where the unit of included angle Φ is degrees and the unit of width D is micrometers. Based on experimental results, the inventors concluded that when Φ and D satisfy this relationship, droplets falling on the first rib structure 201 can be guided into the corresponding first collection tank 202. When Φ > 0.12D + 0.3, the second ends 201b of two adjacent first rib structures 201 may be too far apart, causing droplets to leak directly to the bottom of the first cluster structure 20.

[0062] For example, the width D of the top surface 201c is 2μm to 20μm. If the top surface 201c is too narrow, droplets may leak directly to the bottom of the first cluster structure 20; if the top surface 201c is too wide, it will be detrimental to the formation of an air column at the bottom between two circumferentially adjacent first rib structures 201, thus hindering load-bearing capacity. Optionally, the width D can be 2μm, 4μm, 6μm, 8μm, 10μm, 12μm, 14μm, 16μm, 18μm, or 20μm.

[0063] For example, the included angle Φ is 0.1° to 2°. An angle that is too large may cause droplets to leak directly to the bottom of the first cluster structure 20, while an angle that is too small will hinder the formation of an air column between two circumferentially adjacent first rib structures 201, thus negatively impacting load-bearing capacity. Optionally, the included angle Φ can be 0.1°, 0.2°, 0.3°, 0.5°, 0.8°, 1°, 1.2°, 1.3°, 1.5°, 1.8°, or 2°.

[0064] For example, such as Figure 5 As shown, the length L of the first rib structure 201 is 10μm to 500μm. If the first rib structure 201 is too short, the droplets are prone to sticking together and are not easy to separate, making it difficult to guide the droplets into the first collection tank 202; if the first rib structure 201 is too long, the distance between the second ends 201b of two circumferentially adjacent first rib structures 201 will be too large, and when the droplet is located at the second end 201b, the surface tension of the liquid is insufficient to support the droplet, which will cause the droplet to leak directly to the bottom of the first cluster structure.

[0065] Figure 7 This is a schematic cross-sectional view of the first rib structure provided in this embodiment, and the cross-section is perpendicular to the first surface. The cross-section of the first rib structure 201 can be as follows: Figure 7 Part (a) is shown as an I-shape, or as... Figure 7 Part (b) describes a T-shape or other shape.

[0066] For example, see again Figure 2 The diameter n of the first collection tank 202 is 1mm to 10mm; combined with Figure 2 and Figure 5 The depth H of the first collecting groove 202 is 0.5μm to 5μm, which means the height H of the first rib structure 201 is 0.5μm to 5μm. If the diameter of the first collecting groove 202 is too large, it will be unfavorable for a narrow frame; if it is too small, there will not be enough space to collect droplets. If the height of the first collecting groove 202 is too small, it will result in insufficient collecting space, or the air column below the first rib structure may not be sufficient to support the droplets above the first rib structure, causing the droplets to contact the bottom of the first cluster structure 20 and flow into the bottom. It will also increase the manufacturing difficulty of the I-shaped or T-shaped first rib structure. If the height of the first collecting groove 202 is too large, that is, the height of the first rib structure 201 is too large, it will lead to greater manufacturing difficulty for the first rib structure 201.

[0067] In this embodiment, the micro / nano structure of the multiple first rib structures 201 of the first cluster structure 20 arranged circumferentially around the first collection groove 202 has hydrophobic properties. The drainage structure 2 also includes a hydrophobic film located on the side of the multiple first cluster structures 20 away from the first surface A. When there is a droplet above the first cluster structure 20, external stimuli such as light or temperature are applied to the first rib structure 201, thereby enhancing the hydrophobic properties of the surface of the first rib structure 201, which facilitates the first rib structure 201 in guiding the droplet above into the first collection groove 202. Optionally, the material of the hydrophobic film can be a light-sensitive or temperature-sensitive material, such as poly(N-isopropylacrylamide) (PNIPAM).

[0068] In this embodiment, the first peripheral region 12 includes an encapsulation region and a bonding region. For the first cluster structure 20 located in the encapsulation region, see again... Figure 2 The first collection tank 202 contains the solute left after the droplets have dried. The display panel also includes an encapsulation layer 5, the encapsulation layer material of which is also filled in the first collection tank 202.

[0069] Optionally, the droplets in the first collection tank 202 can be adsorbed while the droplets are still wet, or the solute remaining after the droplets have dried can be wiped off. Therefore, the first collection tank 202 may contain only the encapsulation layer material and may not contain any organic material formed after the droplets have dried, or may contain only a very small amount of organic material formed after the droplets have dried. During the wiping process, since the first collection tank 202 and the display area 11 are connected by the first rib structure 201, rather than the first collection tank 202 directly contacting the display area 11, the organic film layer, such as the light-emitting layer, already fabricated in the display area 11 will not be affected.

[0070] Optionally, the encapsulation layer includes an organic encapsulation layer and an inorganic encapsulation layer sequentially stacked in the direction away from the first surface of the first cluster structure. The organic encapsulation layer can fully fill the gaps between the multiple first rib structures 201 and the first collection groove 202. The inorganic encapsulation layer can prevent external water and oxygen from entering the interior of the display panel.

[0071] Optionally, the organic encapsulation layer may be made of materials such as polyimide, polyamide, acrylic resin, or phenolic resin.

[0072] Optionally, the inorganic encapsulation layer may be made of silicon nitride, silicon oxide, or silicon oxynitride.

[0073] In other possible embodiments, the first cluster structure 20 is located in the binding region of the first peripheral region 12, and the first collection tank 202 also contains conductive adhesive. That is, the first collection tank 202 contains conductive adhesive and solute left after the droplets dry, or the first collection tank 202 contains only conductive adhesive for binding. Since the droplets are mostly organic materials, if the diversion structure in the related technology is used here, the resistance of the connection path formed after the random migration and aggregation of the larger droplets is large, which affects the good conductivity of other circuits in the binding region. Optionally, the droplets in the first collection tank 202 can also be adsorbed before the droplets are dried in order to reduce the amount of residual solute in the first collection tank 202 located in the binding region.

[0074] Figure 8 This is a schematic diagram of the arrangement of a first cluster structure provided in an embodiment of this disclosure. Figure 8 Too Figure 1 A magnified view of a portion of region C. (See diagram below.) Figure 8 As shown, multiple first cluster structures 20 are arranged sequentially along the circumference of the display area 11. Since there is at most one first cluster structure 20 in the direction from near to far from the display area 11, this design is beneficial for the narrow bezel design of the product.

[0075] For example, such as Figure 8 As shown, the multiple second ends of each first cluster structure 20 are connected in sequence and all have the same shape. This design of the shapes of the multiple first cluster structures 20 allows them to adapt to display areas 11 of various shapes, such as... Figure 1 and Figure 5 The illustrated embodiment shows a rectangular display area 11. Optionally, as... Figure 1 and Figure 5 As shown, the shapes formed by the sequential connection of multiple second ends 201b of each first cluster structure 20 are all rectangular. This design allows the radial dimensions of the drainage structure 2 at the straight edges and four right angles of the display area 11 to be more uniform.

[0076] Figure 9This is a schematic diagram of the planar structure of another display panel provided in this embodiment of the present disclosure, and a schematic diagram of the corresponding arrangement of the first cluster structure. Figure 1 and Figure 8 Compared to the embodiments shown, Figure 9 In the illustrated embodiment, the plurality of first cluster structures 20 are divided into two first cluster structure groups 20a. The two first cluster structure groups 20a are arranged along a direction away from the display area 11, and the plurality of first cluster structures 20 in each first cluster structure group 20a are arranged sequentially along the circumference of the display area 11. By setting multiple first cluster structure groups 20a, the radial dimension of the drainage structure 2 is increased, which can better guide the droplets located in the first peripheral area into the first collection tank 202.

[0077] In other possible embodiments, three or more first cluster structure groups 20a may be designed according to design requirements. These first cluster structure groups 20a are arranged in a direction away from the display area 11, and each first cluster structure group 20a includes a plurality of first cluster structures 20 surrounding the display area 11.

[0078] For example, such as Figure 9 As shown, in the first cluster structure group 20a near the display area 11, the centers of the first collection grooves 202 of the plurality of first cluster structures 20 are arranged along line n1; in the first cluster structure group 20a away from the display area 11, the centers of the first collection grooves 202 of the plurality of first cluster structures 20 are arranged along line n2. The extending directions of n1 and n2 can both be the same as the extending direction of the edge of the display area 11, so that within a first cluster structure group, the distance between each first collection groove 202 and the edge of the display area 11 is the same, thereby making the width dimension of the display panel bezel more uniform.

[0079] For example, such as Figure 9 As shown, when the drainage structure 2 has two first cluster structure groups 20a, the flow path from the center of the display area 11 to the edge of the display area 11 passes through the center of at most one first collection groove. This design allows the first collection grooves of the two first cluster structure groups to be staggered as much as possible, thereby more fully collecting droplets from all parts of the first peripheral area 12.

[0080] In other possible embodiments, when the drainage structure 2 has N first cluster structure groups 20, N≥3 and N is an integer, the direction from the center of the display area 11 to the edge of the display area 11 passes through the center of at most N-1 first collection slots. This design allows the first collection slots of the N first cluster structure groups to be staggered as much as possible, thereby more fully collecting droplets from all parts of the first peripheral area 12.

[0081] For example, such as Figure 9As shown, at least two of the multiple first cluster structures 20 have edges with different shapes. This design of the shapes of the multiple first cluster structures 20 allows them to be adapted to display areas 11 with other shapes, such as... Figure 6 The illustrated embodiment shows an elliptical display area 11. Optionally, in such a case... Figure 9 In the illustrated embodiment, the pattern formed by sequentially connecting multiple second ends 201b in a portion of the first cluster structure 20 is approximately circular, and the pattern formed by sequentially connecting multiple second ends 201b in a portion of the first cluster structure 20 is approximately a circle with one, two, or three recesses, or other shapes. This design allows the radial dimensions of the drainage structure 2 to be relatively uniform at various points along the arcuate edge of the display area 11.

[0082] Therefore, the edges of the multiple first cluster structures 20 have the same shape, or at least two of the multiple first cluster structures 20 have different edge shapes, which can adapt to display areas 11 of different shapes.

[0083] Optionally, such as Figure 9 As shown, the plurality of first cluster structures 20 include a first target rib structure 2011 and a second target rib structure 2012. The distance between the first cluster structure group 20a to which the first target rib structure 2011 belongs and the display area 11 is smaller than the distance between the first cluster structure group 20a to which the second target rib structure 2012 belongs and the display area 11. The length of the first target rib structure 2011 is different from the length of the second target rib structure 2012. By designing the first target rib structure 2011 and the second target rib structure 2012 with different lengths, first cluster structures 20 with different edge shapes are formed. For example... Figure 9 In the embodiment shown, the length of the first target rib structure 2011 is greater than the length of the second target rib structure 2012, and the first cluster structure 20 to which the first target rib structure 2011 belongs is adjacent to the first cluster structure 20 to which the second target rib structure 2012 belongs.

[0084] In other possible embodiments, if display area 11 is Figure 9 The ellipse shown can be a plurality of first cluster structures 20 or there can be only one first cluster structure group 20a, and there are at least two first cluster structures 20 with different shapes.

[0085] Figure 10 This is a schematic diagram of the planar structure of another display panel provided in this embodiment of the present disclosure, and a schematic diagram of the corresponding arrangement of the first cluster structure. For example... Figure 10As shown, if the display area 11 is circular, the plurality of first cluster structures 20 may have only one first cluster structure group 20a. In other possible embodiments, for a circular display area 11, the plurality of first cluster structures 20 may have a plurality of first cluster structure groups 20a.

[0086] Figure 11 This is a schematic diagram of the planar structure of two adjacent first cluster structures provided in an embodiment of this disclosure. (See diagram below.) Figure 11 As shown, Figure 11 Part (a) shows two adjacent first cluster structures 20, and the shape formed by the sequential connection of multiple second ends 201b of these two first cluster structures 20 is a rectangle. Figure 11 Part (b) shows two first cluster structures 20, and the pattern formed by the sequential connection of multiple second ends 201b of these two first cluster structures 20 is approximately circular. The spacing m between two adjacent first cluster structures 20 is 2μm to 8μm, for example, 2μm, 4μm, 6μm and 8μm. Here, the distance between two adjacent first cluster structures 20 specifically refers to the distance between the patterns of two adjacent first cluster structures 20. For example, the shortest distance from any point on the edge of the pattern of one first cluster structure 20 to the edge of the pattern of the adjacent first cluster structure 20 is m. A certain distance also needs to be maintained between two adjacent first cluster structures 20 to form an air column that carries the droplets above the first rib structure 201. If the spacing is too small, it will not be conducive to the formation of an air column. If the spacing is too large, the droplets above the first rib structure 201 may leak directly to the bottom of the first cluster structure 20, affecting the drainage effect.

[0087] Figure 12 This is a schematic cross-sectional view of another display panel provided in an embodiment of this disclosure. For example... Figure 12 As shown, the display substrate 1 includes a substrate 8, a driving circuit layer 3 and a light-emitting functional layer 4 stacked in sequence. Both the driving circuit layer 3 and the light-emitting functional layer 4 are located in the display area 11. The driving circuit layer 3 includes a source-drain layer. The first rib structure 201 is on the same layer as the source-drain layer. Fabrication on the same layer can save process time.

[0088] Optionally, the source and drain layers are made of multilayer metals such as titanium, aluminum, and titanium. Optionally, the titanium layer, aluminum layer, and titanium layer are sequentially stacked on the first surface A. The first rib structure is in the same layer as the source and drain layers. When etching in the titanium-aluminum-titanium multilayer material, because the etching rate of aluminum is faster, the transverse groove size formed in the aluminum layer is larger than the transverse groove size in the titanium layer, which will form an I-shaped structure, making it easier to fabricate the I-shaped first rib structure 201.

[0089] For example, such as Figure 12 As shown, the driving circuit layer 3 and the substrate 8 can be referred to as the driving backplane. Figure 11The drive backplane shown is an LTPO (Low-temperature Polycrystalline Oxide) backplane.

[0090] The following is about Figure 12 The layer structure of the LTPO backplane in the illustrated embodiment is provided as an example.

[0091] For example, such as Figure 11 As shown, the driving circuit layer 3 includes, sequentially stacked on the substrate 8, a light-shielding layer 301, a buffer layer 309, a first semiconductor layer 307, a first gate insulating layer 310, a first gate layer 302, a first insulating layer 311, a second gate layer 303, a second gate insulating layer 312, a second semiconductor layer 308, a third gate insulating layer 313, a third gate layer 304, an interlayer dielectric layer 314, a passivation layer 315, a first source-drain layer 305, a first planarization layer 316, a second source-drain layer 306, and a second planarization layer 317. The first source-drain layer 305 or the second source-drain layer 306 is the aforementioned source-drain layer. Figure 11 In the embodiment shown, the first rib structure 201 is on the same layer as the second source / drain layer 306.

[0092] For example, the substrate 1 can be any transparent substrate, such as a glass substrate, quartz substrate, plastic substrate, other transparent rigid substrate, or other transparent flexible substrate, and can be a single-layer or multi-layer structure. Taking a multi-layer structure as an example, the substrate 1 includes a first PI (polyimide) layer, a first protective layer, a second PI (polyimide) layer, and a second protective layer stacked sequentially from bottom to top. The two protective layers are used to protect the PI layer and prevent damage to the PI layer by subsequent processes. A buffer layer is also covered on the second protective layer to block water and oxygen and to block alkaline ions.

[0093] For example, the material used to fabricate the light-shielding layer 301 can be a metallic material, including but not limited to molybdenum, aluminum, titanium, copper, etc. The light-shielding layer 301 can reduce the light exposure received by the TFT (Thin Film Transistor) and also conduct electricity. The light-shielding layer 301 can also be referred to as a BSM (bottom shield metal) layer.

[0094] For example, the first semiconductor layer 307 is made of low-temperature polycrystalline silicon material, and the second semiconductor layer 308 is made of metal oxide semiconductor material such as IGZO (Indium Gallium Zinc Oxide).

[0095] For example, the materials used to fabricate the first gate insulating layer 310, the first insulating layer 311, the second gate insulating layer 312, the third gate insulating layer 313, and the interlayer dielectric layer 314 may be silicon oxide or silicon nitride, silicon nitride, etc.

[0096] For example, the first gate layer 302, the second gate layer 303 and the third gate layer 304 are made of metallic materials, such as one or more of molybdenum, copper, aluminum and titanium.

[0097] For example, the passivation layer 315 can be made of silicon oxide, silicon nitride, or silicon oxide.

[0098] For example, the first planarization layer 316 and the second planarization layer 317 are made of organic insulating materials, such as resin.

[0099] In other possible embodiments, the driving backplane composed of the driving circuit layer 3 and the substrate 8 is an LTPS (Low Temperature Poly-Silicon) backplane. For the LTPS backplane, the driving circuit layer 3 includes a first gate layer, a first gate insulating layer, a first semiconductor layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a passivation layer, a first source / drain layer, and a first planarization layer sequentially stacked on the first surface A. The first source / drain layer is the aforementioned source / drain layer. The materials used to fabricate each layer are the same as those used in the previous LTPO backplane section, and will not be described again here.

[0100] In this embodiment of the disclosure, the display panel is an OLED (Organic Light Emitting Diode) display panel or a QLED (Quantum Dot Light Emitting Diode) display panel. Figure 11 The embodiment shown is an OLED display panel. The following section discusses... Figure 12 The light-emitting functional layer 4 of the OLED display panel shown is illustrated by way of example.

[0101] For example, such as Figure 12 As shown, the light-emitting functional layer 4 includes a first electrode layer 41, a light-emitting layer 42, and a second electrode layer 43 sequentially stacked on the first surface A, wherein the light-emitting layer 42 is an organic light-emitting layer. The drainage structure in this embodiment can guide the organic light-emitting liquid material into the first collection tank 202.

[0102] For example, the first electrode layer 41 includes a plurality of first electrodes arranged in an array, and the plurality of first electrodes correspond one-to-one with a plurality of sub-pixels.

[0103] For example, the first electrode layer 41 is an anode layer, made of a metallic material, such as gold or silver, or made of a transparent conductive material, such as ITO (Indium tin oxide).

[0104] For example, the light-emitting layer 42 includes a plurality of light-emitting blocks arranged in an array, each light-emitting block corresponding one-to-one with a plurality of light sources, and the light-emitting blocks are of different colors, thereby realizing a color display function. Optionally, the colors of the plurality of light-emitting blocks include red, green and blue.

[0105] For example, the second electrode layer 43 is a single-layer structure. The first electrode, the light-emitting block, and part of the second electrode layer constitute a light-emitting unit, and one light-emitting unit corresponds to one sub-pixel.

[0106] For example, the second electrode layer 43 is a cathode layer made of a transparent conductive material, such as ITO.

[0107] For example, such as Figure 12 As shown, the light-emitting functional layer 4 also includes a pixel definition layer 44, which is located between two adjacent first electrodes and between two adjacent light-emitting blocks. The pixel definition layer 44 is used to separate different first electrodes and light-emitting blocks, thereby dividing the space into multiple light-emitting units.

[0108] Exemplarily, the light-emitting layer 42 is an organic light-emitting layer. The light-emitting layer 42 may include, sequentially stacked on the first surface A, a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), a light-emitting material layer, a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL), wherein the light-emitting material layer is made of an organic light-emitting material. The drainage structure in this embodiment can introduce, for example, HTL liquid material and HIL liquid material into the first collection tank 202. Furthermore, for multiple light-emitting blocks of different colors, the light-emitting material layers of the multiple light-emitting blocks are different, but the HIL, HTL, etc., of the multiple light-emitting blocks are the same; that is, the HIL, HTL, etc., film layers are common layers. For common layers, a full-coverage coating method is generally used to form the film. Therefore, this embodiment is particularly suitable for separating HIL, HTL, etc., film layers formed by a full-coverage coating method.

[0109] Figure 13 This is a schematic cross-sectional view of the display area of ​​another display panel provided in this embodiment of the present disclosure. Figure 12Compared to the embodiments shown, Figure 13 In the illustrated embodiment, the display panel is a QLED display panel, and correspondingly, the light-emitting layer 42 is a quantum dot light-emitting layer. The drainage structure in this embodiment can guide the liquid quantum dot light-emitting material into the first collection tank 202.

[0110] Optionally, with Figure 12 Compared to the embodiments shown, Figure 13 In the illustrated embodiment, the light-emitting layer 42 is a quantum dot light-emitting layer. Optionally, in Figure 13 In the embodiment shown, HIL, HTL, EBL, luminescent material layer, HBL, ETL and EIL are sequentially stacked on the first surface A, wherein the luminescent material layer is made of quantum dot luminescent material.

[0111] also, Figure 13 In the embodiment shown, the display substrate 1 further includes a color transfer layer 6 and a color filter layer 7.

[0112] Optionally, the color filter layer 7 includes a plurality of color resist blocks arranged in an array, and a black matrix located between two adjacent color resist blocks. The color conversion layer 6 includes a plurality of color conversion units arranged in an array, each color conversion unit corresponding to one of the plurality of color resist blocks, and the orthographic projection of the plurality of color conversion units on the first surface A at least partially overlaps with the orthographic projection of the plurality of color resist blocks on the first surface A.

[0113] Figure 14 This is a schematic diagram of the planar structure of another display panel provided in an embodiment of this disclosure. For example... Figure 14 As shown, the display substrate 1 further includes an opening region 13 and a second peripheral region 14. The display region 11 surrounds the opening region 13, and the second peripheral region 14 is located between the opening region 13 and the display region 11. The drainage structure 2 further includes a plurality of second cluster structures 21 located in the second peripheral region 14. The plurality of second cluster structures 21 are arranged around the opening region 13. Each second cluster structure 21 has a second collection groove, and the second cluster structure 21 includes a plurality of second rib structures arranged circumferentially along the second collection groove. The plurality of second rib structures are configured to guide droplets to the second collection groove surrounded by the plurality of second rib structures. The drainage structure in this embodiment can also be applied to a display panel with an opening region. When fabricating, for example, a light-emitting layer, the film layer formed by droplets above the drainage structure in the second peripheral region can be isolated to prevent the formation of a connection path after drying, thereby preventing external water and oxygen from entering the interior of the display panel through the connection path and affecting the encapsulation effect of the display panel.

[0114] In other possible embodiments, the display substrate 1 further includes a plurality of aperture regions 13 and a plurality of second peripheral regions 14, the display region 11 surrounding the plurality of aperture regions 13, the plurality of second peripheral regions 14 corresponding one-to-one with the plurality of aperture regions 13, and the plurality of second peripheral regions 14 located between the plurality of aperture regions 13 and the display region 11. The drainage structure 2 further includes a plurality of second cluster structures 21, the plurality of second cluster structures 21 located in the plurality of second peripheral regions 14, and the plurality of second cluster structures 21 arranged around the plurality of aperture regions 13.

[0115] Optionally, the shape of the opening area 13 can be as follows: Figure 14 The circle shown can also be an oval, a rectangle, etc., and this disclosure does not limit it.

[0116] Optionally, the design of the second collection groove and the second rib structure in the second cluster structure 21 is the same as that of the first collection groove and the first rib structure in the first cluster structure 20.

[0117] Optionally, the arrangement of the plurality of second cluster structures 21 is the same as the arrangement of the plurality of first cluster structures 20 described above.

[0118] Figure 15 This is a schematic flowchart illustrating a method for manufacturing a display panel according to an embodiment of this disclosure. Figure 15 As shown, the method includes:

[0119] In step S1, a display substrate is provided, which includes a display area and a first peripheral area located at the edge of the display area.

[0120] In step S2, a drainage structure is fabricated on the first surface of the display substrate.

[0121] The drainage structure includes multiple first cluster structures located in a first peripheral area and arranged around a display area. Each first cluster structure has a first collection groove, and the first cluster structure includes multiple first rib structures arranged circumferentially along the first collection groove. The multiple first rib structures are configured to guide droplets to the first collection groove surrounded by the multiple first rib structures.

[0122] The following is based on Figure 1 and Figure 13 Taking the structure shown as an example, step S2 will be illustrated. Exemplarily, step S2 may include:

[0123] The first step is to deposit a light-shielding metal layer on a substrate, and then pattern the light-shielding metal layer to obtain a light-shielding layer located in the display area.

[0124] The second step involves forming a buffer layer on the light-shielding layer by, for example, deposition. A first semiconductor material layer is then formed on the buffer layer by, for example, deposition, and patterned to obtain a first active layer.

[0125] The third step involves sequentially forming an initial first gate insulating layer and a first gate material layer on the first active layer, for example, by deposition. The initial first gate insulating layer covers the first active layer. The first gate material layer is then patterned to obtain the first gate layer. Optionally, the portion of the first active layer not covered by the first gate layer is conductively processed to ensure good ohmic contact between the first active layer and the subsequently formed first source / drain layers.

[0126] Fourth step: An initial first insulating layer and a second gate material layer are sequentially formed on the first gate layer by, for example, deposition. The second gate material layer is then patterned to obtain the second gate layer.

[0127] Step 5: On the second gate layer, an initial second gate insulating layer and a second semiconductor material layer are formed sequentially by, for example, deposition. The second semiconductor material layer is then patterned to obtain the second active layer.

[0128] Step 6: An initial third gate insulating layer and a third gate material layer are sequentially formed on the second active layer by, for example, deposition. The initial third gate insulating layer covers the second active layer. The third gate material layer is patterned to obtain the third gate layer. Optionally, the portion of the second active layer not covered by the third gate layer is conductive to ensure good ohmic contact between the second active layer and the subsequently formed second source / drain layers.

[0129] Step 7: An initial interlayer dielectric layer and an initial passivation layer are sequentially formed on the third gate layer by, for example, deposition. On the initial passivation layer, multiple vias exposing the light-shielding layer, the first active layer, and the second active layer are formed through a series of processes such as photoresist coating, exposure, etching, and stripping; the initial first gate insulating layer is obtained to form the first gate insulating layer, and simultaneously, the initial second gate insulating layer is obtained to form the second gate insulating layer, the initial third gate insulating layer is obtained to form the third gate insulating layer, the initial interlayer dielectric layer is obtained to form the interlayer dielectric layer, and the initial passivation layer is obtained to form the passivation layer.

[0130] Step 8: Within the via obtained in step 7, a first source / drain layer is formed through a series of processes such as deposition, photoresist coating, exposure, etching, and stripping.

[0131] Step 9: An initial first planarization layer is formed on the first source / drain patterned layer by, for example, deposition, and the initial first planarization layer is patterned to remove the initial first planarization layer located in the first peripheral region. Through a series of processes such as photoresist coating, exposure, etching, and stripping, multiple vias exposing the first source / drain layer are formed, and simultaneously, a first planarization layer is obtained from the initial first planarization layer.

[0132] Step 10: In the via obtained by etching in step 9 and in the first peripheral region, a second source-drain pattern layer is formed by a series of processes such as deposition, photoresist coating, exposure, etching, and stripping. The second source-drain pattern layer includes a second source-drain layer located in the display area and a plurality of first cluster structures located in the first peripheral region.

[0133] Step 11: An initial second planarization layer is formed on the second source-drain patterned layer by, for example, deposition, and the initial second planarization layer is patterned to remove the initial second planarization layer located in the first peripheral region, thereby obtaining the second planarization layer.

[0134] Step 12: A first electrode layer is formed by means of, for example, deposition and patterning. The first electrode layer includes a plurality of first electrodes. A pixel definition layer is formed on the first electrode layer by means of, for example, deposition and patterning.

[0135] Step 13: Apply liquid HIL material using a full-coverage coating method. The HIL material droplets located above the drainage structure are guided into the first collection tank by the first rib structure to form HIL. HTL and EBL are then formed sequentially using the same method as HIL formation.

[0136] Optionally, before fabricating HIL, HTL, and EBL, a hydrophobic film is formed on the surface of the plurality of first cluster structures away from the first surface by, for example, deposition. After coating the liquid HIL, HTL, or EBL material, the drainage structure is subjected to external stimuli such as light or temperature to enhance the hydrophobic properties of the surface of the first rib structure, which facilitates the first rib structure in guiding droplets into the first collection tank.

[0137] Optionally, before the droplets dry, the droplets in the first collection tank can be adsorbed to remove most of the droplets, leaving only a very small amount of solute after drying, which is beneficial to improving the encapsulation effect of the display panel. For example, a syringe can be used to draw up the droplets, and this method is convenient for mass production.

[0138] Optionally, after the droplets dry, the droplets located in the first collection tank are wiped. For example, a cotton swab can be used. Optionally, an alcohol solvent, acetone, or toluene can be used for wiping to dissolve the solute left after the droplets in the first collection tank have dried, and different solvents can be selected according to different film layers.

[0139] Step 14: Form a light-emitting layer using, for example, inkjet printing. The light-emitting layer comprises an array of multiple light-emitting blocks. Optionally, first form an array of multiple red light-emitting blocks, then form an array of multiple green light-emitting blocks, and finally form an array of multiple blue light-emitting blocks.

[0140] Step 15: Form HBL, ETL, and EIL in a manner similar to that in Step 13.

[0141] Step 16: A second electrode layer is formed in the display area by means of, for example, deposition and patterning. An encapsulation layer is then formed by means of, for example, deposition, covering the display area and the first peripheral area.

[0142] Optionally, patterning processes include photoresist coating, exposure, development, etching, and stripping.

[0143] The materials for each layer are described in the aforementioned embodiments and will not be repeated here.

[0144] Figure 16 This is a schematic diagram illustrating a method for fabricating a light-emitting layer using an all-over coating technique, as provided in this embodiment. It can simultaneously fabricate... Figure 16 The two or more display panels shown are respectively coated with liquid material on the surfaces of multiple display panels in steps thirteen and fifteen, with the coating boundary being Q. Due to the presence of the drainage structure 2, the light-emitting layers of different display areas 11 can be separated. Optionally, droplets located outside the display areas 11 and the drainage structure 2 are subjected to adsorption or wiping treatment. Optionally, multiple display panels are divided along the dividing line P before the encapsulation process.

[0145] This disclosure also provides a display device, which includes any of the aforementioned display panels and a power supply circuit, wherein the power supply circuit is used to supply power to the display panel.

[0146] For example, the display device provided in the embodiments of this disclosure can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0147] This display device has the same effect as the aforementioned display panel, which will not be described in detail here.

[0148] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A display panel, characterized in that, The display panel includes a display substrate and a drainage structure. The display substrate includes a display area and a first peripheral area located at the edge of the display area. The drainage structure is located on a first surface of the display substrate. The drainage structure includes a plurality of first cluster structures located in the first peripheral area and arranged around the display area. Each first cluster structure has a first collection groove, and the first cluster structure includes a plurality of first rib structures arranged circumferentially along the first collection groove. The plurality of first rib structures are configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures. The display substrate includes a substrate, a driving circuit layer and a light-emitting functional layer stacked sequentially. The driving circuit layer and the light-emitting functional layer are both located in the display area. The driving circuit layer includes a source-drain layer, and the first rib structure is on the same layer as the source-drain layer. The first peripheral area includes an encapsulation area and a bonding area, the first cluster structure is located in the encapsulation area, and the first collection groove is filled with an encapsulation layer; or, the first cluster structure is located in the bonding area, and the first collection groove is filled with conductive adhesive.

2. The display panel according to claim 1, characterized in that, Each of the first rib structures has a first end close to the first collection groove and a second end away from the first collection groove, and the distance between two adjacent first rib structures in the circumferential direction gradually increases in the direction from the first end to the second end.

3. The display panel according to claim 2, characterized in that, In at least one of the first cluster structures, the first ends of the plurality of first rib structures are connected.

4. The display panel according to claim 2, characterized in that, The plurality of first cluster structures are divided into at least two first cluster structure groups, the at least two first cluster structure groups are arranged along a direction away from the display area, and the plurality of first cluster structures in each first cluster structure group are arranged sequentially along the circumference of the display area.

5. The display panel according to claim 2, characterized in that, The plurality of first cluster structures are arranged sequentially along the circumference of the display area.

6. The display panel according to claim 4 or 5, characterized in that, The patterns formed by sequentially connecting the multiple second ends of each of the first cluster structures are identical; or... Among the plurality of first cluster structures, at least two of the second ends of the first cluster structures are connected in sequence to form different patterns.

7. The display panel according to claim 4, characterized in that, The plurality of first cluster structures include a first target rib structure and a second target rib structure, wherein the distance between the first cluster structure group to which the first target rib structure belongs and the display area is less than the distance between the first cluster structure group to which the second target rib structure belongs and the display area; The length of the first target rib structure is different from the length of the second target rib structure.

8. The display panel according to any one of claims 1 to 5 and claim 7, characterized in that, The spacing between two adjacent first cluster structures is 2μm to 8μm.

9. The display panel according to any one of claims 1 to 5 and claim 7, characterized in that, The diameter of the first collection groove is 1mm to 10mm, and the depth of the first collection groove is 0.5μm to 5μm.

10. The display panel according to any one of claims 1 to 5 and claim 7, characterized in that, The first rib structure has a top surface away from the first surface, and the first rib structure has at least one first cross section, the first cross section being parallel to the first surface, and the width of the top surface being greater than the width of the first cross section.

11. The display panel according to any one of claims 1 to 5 and claim 7, characterized in that, The length of the first rib structure is 10μm~500μm.

12. The display panel according to claim 11, characterized in that, The light-emitting functional layer includes a first electrode layer, a light-emitting layer, and a second electrode layer that are sequentially stacked on the first surface. Wherein, the light-emitting layer is an organic light-emitting layer, or the light-emitting layer is a quantum dot light-emitting layer.

13. The display panel according to any one of claims 1 to 5, 7 and 12, characterized in that, The drainage structure further includes a hydrophobic film located on the side of the plurality of first cluster structures away from the first surface.

14. The display panel according to any one of claims 1 to 5, 7 and 12, characterized in that, The display substrate further includes at least one opening area and at least one second peripheral area, the display area surrounds the at least one opening area, the at least one second peripheral area corresponds one-to-one with the at least one opening area, and the at least one second peripheral area is located between the at least one opening area and the display area; The drainage structure further includes a plurality of second cluster structures located in the at least one second peripheral region. The plurality of second cluster structures are arranged around the at least one opening region. Each second cluster structure has a second collection groove, and the second cluster structure includes a plurality of second rib structures arranged circumferentially along the second collection groove. The plurality of second rib structures are configured to guide droplets to the second collection groove surrounded by the plurality of second rib structures.

15. A method for manufacturing a display panel, characterized in that, The method includes: A display substrate is provided, the display substrate including a display area and a first peripheral area located at the edge of the display area; A drainage structure is formed on the first surface of the display substrate; The drainage structure includes multiple first cluster structures located in the first peripheral region and arranged around the display area. Each first cluster structure has a first collection groove, and each first cluster structure includes multiple first rib structures arranged circumferentially along the first collection groove. The multiple first rib structures are configured to guide droplets into the first collection groove surrounded by the multiple first rib structures. The display substrate includes a substrate, a driving circuit layer, and a light-emitting functional layer stacked sequentially. The driving circuit layer and the light-emitting functional layer are both located in the display area. The driving circuit layer includes a source-drain layer, and the first rib structures are on the same layer as the source-drain layer. The first peripheral region includes an encapsulation region and a bonding region. The first cluster structure is located in the encapsulation region, and the first collection groove is filled with the encapsulation layer. Alternatively, the first cluster structure is located in the bonding region, and the first collection groove is filled with conductive adhesive.

16. A display device, characterized in that, The display device includes a power supply circuit and a display panel as described in any one of claims 1 to 14, wherein the power supply circuit supplies power to the display panel.

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