Display panel and manufacturing method therefor, and display apparatus

Abstract

Embodiments of the present disclosure relate to the technical field of display, and provide a display panel and a manufacturing method therefor, and a display apparatus. The display panel comprises a display substrate and a flow guide structure, the display substrate comprises a display area and a first peripheral area located at the edge of the display area, and the flow guide structure is located on a first surface of the display substrate. The flow guide structure comprises a plurality of first cluster structures, and the plurality of first cluster structures are located in the first peripheral area. The plurality of first cluster structures are arranged around the display area, each first cluster structure has a first collection recess and comprises a plurality of first rib structures arranged in the circumferential direction of the first collection recess, and the plurality of first rib structures are configured to guide droplets to the first collection recess surrounded by the plurality of first rib structures. The embodiments of the present disclosure can mitigate the problem that a connection pathway is formed after drying of larger droplets formed due to random migration or aggregation of droplets located on the flow guide structure, thereby preventing external moisture and oxygen from entering the interior of the display panel by means of the connection pathway and affecting the packaging effect.

Description

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

[0001] The embodiments of the present disclosure relate to the field of display technology, and in particular to a display panel, a manufacturing method thereof, and a display device. Background Art

[0002] Display devices have a wide range of applications in daily life, such as in electronic devices such as mobile phones and tablet computers. Display panels are an important component of display devices.

[0003] In related art, a display panel includes a display substrate and a drainage structure. The display substrate includes a display area and a peripheral area. The peripheral area surrounds the display area, and the drainage structure is located in the peripheral area. The drainage structure includes multiple parallel blocking structures and a collection trough located between the blocking structures. The blocking structures extend parallel to the edge of the display area.

[0004] However, droplets (such as ink of luminescent materials) falling on multiple parallel retaining walls may randomly migrate and aggregate to form larger droplets, which may form connecting paths after drying. External water and oxygen will enter the display panel through the connecting paths, affecting the packaging effect of the display panel.

[0005] Summary of the Invention

[0006] The embodiments of the present disclosure provide a display panel, a manufacturing method thereof, and a display device, which can improve the packaging effect of the display panel. The technical solution is as follows:

[0007] On the one hand, a display panel is provided, which includes a display substrate and a drainage structure, wherein the display substrate includes a display area and a first peripheral area located at the edge of the display area, and the drainage structure is located on the first surface of the display substrate; the drainage structure includes a plurality of first cluster structures, and the plurality of first cluster structures are located in the first peripheral area, and the plurality of first cluster structures are arranged around the display area, each of the first cluster structures has a first collection groove, and the first cluster structure includes a plurality of first rib structures arranged along the circumference of the first collection groove, and the plurality of first rib structures are configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures.

[0008] Optionally, each of the first rib structures has a first end close to the first collecting groove and a second end away from the first collecting groove, and in the direction from the first end to the second end, the distance between two circumferentially adjacent first rib structures gradually increases.

[0009] Optionally, in at least one of the first cluster structures, the first ends of the plurality of first rib structures are connected.

[0010] Optionally, the multiple first cluster structures are divided into at least two first cluster structure groups, the at least two first cluster structure groups are arranged in a direction away from the display area, and the multiple first cluster structures in each first cluster structure group are arranged in sequence along the circumference of the display area.

[0011] Optionally, the plurality of first cluster structures are arranged in sequence along the circumference of the display area.

[0012] Optionally, the graphs formed by sequentially connecting the multiple second ends of each first cluster structure are the same; or, the graphs formed by sequentially connecting the multiple second ends of at least two of the multiple first cluster structures are different.

[0013] Optionally, the multiple first cluster structures include a first target rib structure and a second target rib structure, and the distance between the first cluster structure group to which the first target rib structure belongs and the display area is smaller 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.

[0014] Optionally, the interval between two adjacent first cluster structures is 2 μm to 8 μm.

[0015] Optionally, the diameter of the first collecting groove is 1 mm to 10 mm, and the depth of the first collecting groove is 0.5 μm to 5 μm.

[0016] 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 a width of the top surface is greater than a width of the first cross section.

[0017] Optionally, the length of the first rib structure is 10 μm to 500 μm.

[0018] Optionally, the display substrate includes a base substrate, a driving circuit layer and a light-emitting functional layer stacked in sequence, and 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 and drain layer, and the first rib structure is in the same layer as the source and drain layer.

[0019] 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.

[0020] Optionally, the drainage structure further includes a liquid-repellent film, and the liquid-repellent film is located on a side of the plurality of first clustered structures away from the first surface.

[0021] 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 to the at least one opening area one-to-one, 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 along the circumference of 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.

[0022] On the other hand, a method for manufacturing a display panel is provided, the method comprising: providing a display substrate, the display substrate comprising a display area and a first peripheral area located at the edge of the display area; manufacturing a drainage structure on the first surface of the display substrate; wherein the drainage structure comprises a plurality of first cluster structures, the plurality of first cluster structures are located in the first peripheral area, the plurality of first cluster structures are arranged around the display area, each of the first cluster structures has a first collection groove, and the first cluster structure comprises a plurality of first rib structures arranged along the circumference of 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.

[0023] On the other hand, a display device is provided, comprising a power supply circuit and any one of the aforementioned display panels, wherein the power supply circuit supplies power to the display panel.

[0024] The technical solution provided by the present disclosure provides at least the following beneficial effects: by providing a drainage structure comprising a plurality of first clustered structures in the first peripheral region, the first clustered structures comprising a first collection trough and a plurality of first rib structures arranged circumferentially along the first collection trough, the plurality of first rib structures being configured to direct droplets toward the first collection trough surrounded by the plurality of first rib structures. As a result, droplets falling into the first peripheral region flow toward the first collection trough along the direction of convergence of the plurality of first rib structures, thereby disconnecting the droplets in the first peripheral region from the droplets in the display region. After drying, there is no connecting path between the droplets in the first peripheral region and the display region, thereby preventing external water and oxygen from entering the display panel through the connecting path and affecting the packaging effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present disclosure;

[0027] FIG2 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present disclosure;

[0028] FIG3 is a schematic diagram of a planar structure of a first cluster structure provided by an embodiment of the present disclosure;

[0029] FIG4 is a schematic plan view of another first cluster structure provided by an embodiment of the present disclosure;

[0030] FIG5 is a partially enlarged schematic diagram of a first cluster structure provided by an embodiment of the present disclosure;

[0031] FIG6 is a schematic diagram of a liquid droplet falling on a first rib structure provided by an embodiment of the present disclosure;

[0032] FIG7 is a schematic cross-sectional view of a first rib structure provided by an embodiment of the present disclosure;

[0033] FIG8 is a schematic diagram of an arrangement of a first cluster structure provided by an embodiment of the present disclosure;

[0034] FIG9 is a schematic diagram of a planar structure of another display panel provided by an embodiment of the present disclosure and a schematic diagram of an arrangement of a corresponding first cluster structure;

[0035] FIG10 is a schematic diagram of a planar structure of another display panel provided by an embodiment of the present disclosure and a schematic diagram of the arrangement of the corresponding first clustered structures;

[0036] FIG11 is a schematic diagram of a planar structure of two adjacent first cluster structures provided by an embodiment of the present disclosure;

[0037] FIG12 is a schematic cross-sectional view of another display panel provided in an embodiment of the present disclosure;

[0038] FIG13 is a schematic cross-sectional view of a display area of ​​another display panel provided by an embodiment of the present disclosure;

[0039] FIG14 is a schematic diagram of a planar structure of another display panel provided in an embodiment of the present disclosure;

[0040] FIG15 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present disclosure;

[0041] FIG16 is a schematic diagram of a method for producing a light-emitting layer by a full coating method according to an embodiment of the present disclosure.

[0042] Legend:

[0043] 1. Display substrate 11, display area 12, first peripheral area 13, opening area 14, second peripheral area A, first surface

[0044] 2. Drainage structure 20a, first cluster structure group 20, first cluster structure 201, first rib structure 202, first collection trough 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

[0045] 3. Driving circuit layer 301, light shielding layer 302, first gate layer 303, second gate layer 304, third gate layer 305, first source and drain layer 306, second source and 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

[0046] 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 DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be the ordinary meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "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 only used to distinguish different components. Similarly, similar words such as "one" or "a" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The directional terms mentioned in the present disclosure, such as "top", "bottom", "up", "down", "left" or "right", etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present disclosure, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.

[0049] Figure 1 is a schematic diagram of the planar structure of a display panel provided by an embodiment of the present disclosure. As shown in Figure 1 , the display panel includes a display substrate 1 and a drainage 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. The drainage structure 2 is located in the first peripheral area 12. The drainage structure 2 includes a plurality of first clustered structures 20, which are arranged around the display area 11.

[0050] FIG2 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present disclosure, and FIG2 is a schematic diagram of a cross-sectional structure at the BB section line of FIG1 . As shown in FIG2 , the drainage structure 2 is located on the first surface A of the display substrate.

[0051] FIG3 is a schematic plan view of a first cluster structure provided by an embodiment of the present disclosure, and FIG3 is a partially enlarged view of a first cluster structure in FIG1. ​​Referring to FIG1 to FIG3 , each first cluster structure 20 has a first collection trough 202, and the first cluster structure 20 includes a plurality of first rib structures 201 arranged circumferentially around the first collection trough 202. The plurality of first rib structures 201 are configured to direct liquid droplets toward the first collection trough 202 surrounded by the plurality of first rib structures 201.

[0052] The droplets here can be ink of the light-emitting layer material. The display area 11 includes an array of sub-pixel regions. Because at least part of the film structure in the light-emitting layer can be shared by multiple sub-pixels, these layers are typically formed by a full coating method, such as applying ink to the entire first surface. As a result, droplets may fall onto the first peripheral area 12.

[0053] Since the first rib structure 201 can guide the droplets to the first collection groove 202 surrounded by multiple first rib structures 201, the droplets located in the first collection groove 202 are disconnected from the droplets located in the display area 11. There is no connection path between the droplets located in the first collection groove 202 after drying and the droplets located in the display area 11 after drying, so the packaging effect is better.

[0054] It should be noted that in order to clearly show more structures in FIG. 3 , the first collecting tank 202 in FIG. 3 does not correspond to FIG. 1 or FIG. 2 , and is filled with black to illustrate the feature that the dried droplets gather in the first collecting tank 202 .

[0055] The structure of a first cluster structure 20 is described below.

[0056] In the disclosed embodiment, as shown in FIG3 , each first rib structure 201 has a first end 201a proximal to the first collection slot 202 and a second end 201b distal to the first collection slot. The distance between two circumferentially adjacent first rib structures gradually increases from the first end 201a to the second end 201b. Therefore, droplets above the first rib structures 201 are subjected to unbalanced forces, enabling dynamic migration. Droplets falling into the first peripheral area 12 migrate along the circumferentially arranged first rib structures 201 in the direction in which the first rib structures 201 converge (i.e., from the second end 201b toward the first end 201a), and flow into the first collection slot 202, thereby separating the droplets located in the display area 11 from those located in the first peripheral area 12.

[0057] In the first cluster structure 20 shown in Figure 3, the first ends 201a of the multiple first rib structures 201 are not connected, so the side walls of the formed first collection groove 202 have gaps, but due to the surface tension of the droplets, the droplets flowing into the first collection groove 202 will not flow out through these gaps.

[0058] In the actual production process, a series of steps such as deposition, photoresist coating, exposure, development, etching, and stripping are usually used to produce the first cluster structure 20. Due to the limitations of process accuracy, when producing the first cluster structure shown in Figure 3, 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 walls of the first collection groove 202, and the droplets flowing into the first collection groove 202 will not flow out through the side walls of the first collection groove 202.

[0059] Figure 4 is a schematic plan view of another first cluster structure provided by an embodiment of the present disclosure. As shown in Figure 4 , in a first cluster structure 20, the first ends 201a of multiple first rib structures 201 are connected. This creates a first collection trough 202 with no gaps on its sidewalls, further ensuring that droplets flowing into the first collection trough 202 do not leak out of the sidewalls.

[0060] Therefore, when the first cluster structure is the embodiment shown in Figures 3 or 4, the droplets in each first collection tank 202 are disconnected before the droplets dry. Therefore, the solutes in the dried droplets in each first collection tank 202 are also isolated from each other, achieving a better water and oxygen barrier effect. Adding the aforementioned adsorption treatment before the droplets dry or the aforementioned wiping treatment after the droplets dry can further reduce the amount of residual solutes in the droplets, thereby further enhancing the water and oxygen barrier effect.

[0061] FIG5 is a partially enlarged schematic diagram of a first cluster structure provided by an embodiment of the present disclosure. FIG6 is a schematic diagram of a droplet falling on top of a first rib structure provided by an embodiment of the present disclosure. As shown in FIG5 and FIG6, the first rib structure 201 has a top surface 201c away from the first surface A, and the first rib structure 201 has at least one first cross-section 201d, the first cross-section 201d is parallel to the first surface A, and the width D of the top surface 201c is greater than the width of the first cross-section. This design of a top surface 201c with a larger width and a first cross-section 201d with a smaller width can form a larger gap in the portion below the top surface 201c. When a droplet D falls on the first rib structure 201, the enclosed air E in the gap here can support the droplet above the first rib structure 201, so that the droplet D does not fall to the bottom of the gap between two adjacent first rib structures 201 and is not introduced into the first collecting tank 202. Here, the enclosed air E can also be referred to as an air column.

[0062] For example, as shown in Figure 5, within a first cluster structure, the angle Φ formed by two adjacent first rib structures 201 and the width D of the top surface numerically satisfy the following relationship: Φ < 0.12D + 0.3, where the unit of angle Φ is degrees and the unit of width D is microns. Based on experimental results, the inventors have concluded that when Φ and D satisfy this relationship, droplets falling on the first rib structure 201 can be directed into the corresponding first collection groove 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.

[0063] Exemplarily, the width D of the top surface 201c is 2 μm to 20 μm. If the top surface 201c is too narrow, droplets may leak directly to the bottom of the first clustered structure 20. If the top surface 201c is too wide, it will not be conducive to the formation of an air column at the bottom between two circumferentially adjacent first rib structures 201, thereby hindering load bearing. Optionally, the width D can be 2 μm, 4 μm, 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, or 20 μm.

[0064] For example, the angle Φ is 0.1° to 2°. A too large angle may cause droplets to leak directly to the bottom of the first clustered structure 20, while a too small angle is not conducive to the formation of air columns between two circumferentially adjacent first rib structures 201, thereby hindering load bearing. Alternatively, the 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°.

[0065] For example, as shown in Figure 5, the length L of the first rib structure 201 is 10 μm to 500 μm. If the first rib structure 201 is too short, the droplets will easily stick together and be difficult 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. When the droplets are at the second ends 201b, the liquid surface tension is insufficient to support the droplets, causing the droplets to leak directly to the bottom of the first cluster structure.

[0066] Figure 7 is a schematic cross-sectional view of a first rib structure according to an embodiment of the present disclosure, wherein the cross-section is perpendicular to the first surface. The cross-section of the first rib structure 201 can be an I-shape as shown in part (a) of Figure 7 , or a T-shape as shown in part (b) of Figure 7 , or other shapes.

[0067] For example, referring to FIG2 again, the diameter n of the first collecting groove 202 is 1 mm to 10 mm; in combination with FIG2 and FIG5, the depth H of the first collecting groove 202 is 0.5 μm to 5 μm, that is, the height H of the first rib structure 201 is 0.5 μm to 5 μm. If the diameter of the first collecting groove 202 is too large, it is not conducive to a narrow frame, and if it is too small, there is not enough space to collect droplets. If the height of the first collecting groove 202 is too small, it will cause insufficient collection space, or the air column below the first rib structure will not be enough 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, and it will also increase the process difficulty of manufacturing 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 make the preparation process of the first rib structure 201 more difficult.

[0068] In the embodiment of the present disclosure, the micro-nano structure of the first cluster structure 20, in which the multiple first rib structures 201 are arranged circumferentially around the first collection tank 202, has a liquid-repellent property. The drainage structure 2 also includes a liquid-repellent film, which is located on the side of the multiple first cluster structures 20 away from the first surface A. When there are droplets above the first cluster structure 20, the first rib structure 201 is subjected to external stimulation such as light or temperature, thereby enhancing the liquid-repellent property of the surface of the first rib structure 201, which is beneficial for the first rib structure 201 to guide the droplets above into the first collection tank 202. Optionally, the material of the liquid-repellent film can be a light-sensitive or temperature-sensitive material, such as poly (N-isopropylacrylamide) (PNIPAM).

[0069] In the disclosed embodiment, the first peripheral region 12 includes an encapsulation region and a binding region. Regarding the first clustered structure 20 located in the encapsulation region, referring again to FIG2 , the first collection tank 202 contains solutes remaining after the droplets have dried. The display panel also includes an encapsulation layer 5 , the encapsulation layer material also filling the first collection tank 202 .

[0070] Optionally, the droplets in the first collection tank 202 can be subjected to adsorption treatment before the droplets have dried, or the solutes remaining in the first collection tank 202 after the droplets have dried can be wiped. Therefore, in addition to the encapsulation layer material, the first collection tank 202 can also contain no organic material formed after the droplets have dried, or contain 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 separated by the first rib structure 201, rather than the first collection tank 202 being in direct contact with the display area 11, the completed organic film layers in the display area 11, such as the light-emitting layer, will not be affected.

[0071] Optionally, the encapsulation layer includes an organic encapsulation layer and an inorganic encapsulation layer stacked sequentially in a direction away from the first surface of the first clustered structure. The organic encapsulation layer can fully fill the gaps between the plurality of first rib structures 201 and the first collection grooves 202. The inorganic encapsulation layer can prevent external water and oxygen from entering the interior of the display panel.

[0072] Optionally, the organic encapsulation layer is made of polyimide, polyamide, acrylic resin or phenolic resin.

[0073] Optionally, the inorganic encapsulation layer is made of silicon nitride, silicon oxide or silicon oxynitride.

[0074] In other possible embodiments, the first cluster structure 20 is located in the binding area of ​​the first peripheral area 12, and the first collection tank 202 also contains conductive glue. That is, the first collection tank 202 contains conductive glue and solutes left after the droplets dry, or the first collection tank 202 only contains conductive glue for binding. Since the droplets are mostly organic materials, if the drainage structure in the related art is used here, the connection path formed by random migration and aggregation to form larger droplets will have a large resistance after drying, affecting the good conductivity of other circuits in the binding area. Optionally, the droplets in the first collection tank 202 can be adsorbed before drying to reduce the amount of solute residue in the first collection tank 202 located in the binding area.

[0075] Figure 8 is a schematic diagram illustrating an arrangement of first cluster structures provided by an embodiment of the present disclosure. Figure 8 is also a partially enlarged schematic diagram of region C in Figure 1 . As shown in Figure 8 , multiple first cluster structures 20 are sequentially arranged along the circumference of display area 11. Because there is at most one first cluster structure 20 from closer to display area 11 to farther away from it, this design facilitates a narrow bezel design for the product.

[0076] For example, as shown in FIG8 , the shapes of the multiple second ends of each first clustered structure 20 connected in sequence are all the same. This design of the shapes of the multiple first clustered structures 20 can adapt them to display areas 11 of certain shapes, such as the rectangular display area 11 in the embodiments shown in FIG1 and FIG5 . Alternatively, as shown in FIG1 and FIG5 , the shapes of the multiple second ends 201b of each first clustered structure 20 connected in sequence are all rectangular. This design can make the radial dimensions of the drainage structure 2 at the straight edge of the display area 11 and the four right angles more uniform.

[0077] FIG9 is a schematic diagram of the planar structure of another display panel provided by an embodiment of the present disclosure, and a schematic diagram of the arrangement of the corresponding first cluster structures. Compared to the embodiments shown in FIG1 and FIG8 , in the embodiment shown in FIG9 , the multiple first cluster structures 20 are divided into two first cluster structure groups 20 a. The two first cluster structure groups 20 a are arranged in a direction away from the display area 11, and the multiple first cluster structures 20 in each first cluster structure group 20 a are arranged sequentially along the circumference of the display area 11. The provision of multiple first cluster structure groups 20 a increases the radial dimension of the drainage structure 2, which can better guide droplets located in the first peripheral area into the first collection tank 202.

[0078] In other possible embodiments, three or more first cluster structure groups 20 a may be designed according to design requirements. These first cluster structure groups 20 a are arranged in a direction away from the display area 11 , and each first cluster structure group 20 a includes multiple first cluster structures 20 surrounding the display area 11 .

[0079] For example, as shown in FIG9 , in a first clustered structure group 20a near the display area 11, the centers of the first collection grooves 202 of the plurality of first clustered structures 20 are arranged along line n1; in a first clustered structure group 20a away from the display area 11, the centers of the first collection grooves 202 of the plurality of first clustered structures 20 are arranged along line n2. The extension directions of n1 and n2 can both be the same as the extension direction of the edge of the display area 11, so that within a first clustered structure group, each first collection groove 202 is the same distance from the edge of the display area 11, thereby making the width of the display panel frame relatively uniform.

[0080] For example, as shown in FIG9 , when the drainage structure 2 includes two first clustered structure groups 20 a, a direction from the center of the display area 11 toward the edge of the display area 11 passes through the center of at most one first collection trough. This design allows the first collection troughs of the two first clustered structure groups to be staggered as much as possible, thereby more fully collecting droplets from all locations in the first peripheral area 12.

[0081] In other possible embodiments, when the drainage structure 2 has N first clustered structure groups 20, where N ≥ 3 and N is an integer, a direction from the center of the display area 11 toward the edge of the display area 11 passes through the centers of at most N-1 first collection grooves. This design allows the first collection grooves of the N first clustered structure groups to be staggered as much as possible, thereby more fully collecting droplets from all locations in the first peripheral area 12.

[0082] Exemplarily, as shown in Figure 9, the shapes of the edges of at least two first clustered structures 20 in the plurality of first clustered structures 20 are different. This design of the shapes of the plurality of first clustered structures 20 can adapt them to display areas 11 of other shapes, such as the display area 11 of an elliptical shape in the embodiment shown in Figure 6. Optionally, in the embodiment shown in Figure 9, the figure formed by the plurality of second ends 201b in some of the first clustered structures 20 being connected in sequence is approximately circular, and the figure formed by the plurality of second ends 201b in some of the first clustered structures 20 being connected in sequence is approximately a circle with one, two or three depressions, or other shapes. This design can make the radial dimensions of the drainage structure 2 at each of the arcuate edges of the display area 11 more uniform.

[0083] Therefore, the edges of the plurality of first clustered structures 20 have the same shape, or at least two of the plurality of first clustered structures 20 have edges of different shapes, which can adapt to display areas 11 of different shapes.

[0084] Alternatively, as shown in FIG9 , 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 less 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, in the embodiment shown in FIG9 , 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.

[0085] In other possible embodiments, if the display area 11 is an ellipse as shown in FIG. 9 , the plurality of first cluster structures 20 may include only one first cluster structure group 20 a , and at least two first cluster structures 20 may have different shapes.

[0086] FIG10 is a schematic diagram of the planar structure of another display panel provided by an embodiment of the present disclosure, and a schematic diagram of the arrangement of the corresponding first cluster structures. As shown in FIG10 , if the display area 11 is circular, the plurality of first cluster structures 20 may also include only one first cluster structure group 20 a. In other possible embodiments, for a circular display area 11, the plurality of first cluster structures 20 may include multiple first cluster structure groups 20 a.

[0087] Figure 11 is a schematic diagram of the planar structure of two adjacent first cluster structures provided by an embodiment of the present disclosure. As shown in Figure 11, part (a) of Figure 11 shows two adjacent first cluster structures 20, and the figure formed by the multiple second ends 201b of the two first cluster structures 20 being connected in sequence is a rectangle, and part (b) of Figure 11 shows two first cluster structures 20, and the figure formed by the multiple second ends 201b of the two first cluster structures 20 being connected in sequence is approximately circular. The spacing distance m between the two adjacent first cluster structures 20 is 2μm to 8μm, such as 2μm, 4μm, 6μm and 8μm. The distance between the two adjacent first cluster structures 20 here specifically refers to the distance between the figures of the two adjacent first cluster structures 20, such as any point on the edge of the figure of one of the first cluster structures 20, and the closest distance to the edge of the figure of another 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 supports the droplets above the first rib structure 201. If the distance is too small, it is not conducive to the formation of the air column. If the distance 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.

[0088] Figure 12 is a schematic diagram of the cross-sectional structure of another display panel provided by an embodiment of the present disclosure. As shown in Figure 12, the display substrate 1 includes a base substrate 8, a drive circuit layer 3, and a light-emitting functional layer 4 stacked in sequence. The drive circuit layer 3 and the light-emitting functional layer 4 are both located in the display area 11. The drive circuit layer 3 includes a source and drain electrode layer. The first rib structure 201 is formed in the same layer as the source and drain electrode layer. Fabricating the same layer can save process steps.

[0089] Optionally, the source and drain electrode layers are made of a laminated metal such as titanium, aluminum, or titanium. Optionally, a titanium layer, an aluminum layer, and a titanium layer are sequentially laminated on the first surface A. The first rib structure is formed in the same layer as the source and drain electrode layers. When etching the titanium-aluminum-titanium laminated material, the lateral grooves formed in the aluminum layer are larger than those in the titanium layer due to the faster etching rate of aluminum. This results in an I-shaped structure, facilitating the production of the I-shaped first rib structure 201.

[0090] Exemplarily, as shown in FIG12 , the driving circuit layer 3 and the base substrate 8 may be referred to as a driving backplane, and the driving backplane shown in FIG11 is an LTPO (Low-temperature Polycrystalline oxide) backplane.

[0091] The following is an exemplary description of the various layer structures of the LTPO backplane in the embodiment shown in Figure 12.

[0092] For example, as shown in FIG11 , the driving circuit layer 3 includes 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, stacked sequentially on the base substrate 8. The first source-drain layer 305 or the second source-drain layer 306 is the aforementioned source-drain layer. In the embodiment shown in FIG11 , the first rib structure 201 and the second source-drain layer 306 are co-layered.

[0093] For example, the base substrate 1 can be any transparent substrate, such as a glass substrate, a quartz substrate, a plastic substrate, other transparent hard substrates, or other transparent flexible substrates, and can be a single-layer or multi-layer structure. Taking a multi-layer structure as an example, the base substrate 1 includes a first PI (polyimide) layer, a first protective layer, a second PI (polyimide) layer, and a second protective layer stacked 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. The second protective layer is also covered with a buffer layer to block water oxygen and block alkaline ions.

[0094] For example, light shielding layer 301 can be made of a metal material, including but not limited to molybdenum, aluminum, titanium, copper, etc. Light shielding layer 301 can reduce light exposure to the thin film transistor (TFT) while also being conductive. Light shielding layer 301 can also be referred to as a BSM (bottom shield metal) layer.

[0095] Illustratively, the first semiconductor layer 307 is made of low-temperature polysilicon material, and the second semiconductor layer 308 is made of metal oxide semiconductor materials such as IGZO (Indium Gallium Zinc Oxide).

[0096] For example, 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 made of silicon oxide, silicon nitride, silicon oxynitride or the like.

[0097] Illustratively, the first gate layer 302 , the second gate layer 303 and the third gate layer 304 are made of metal materials, such as one or more of molybdenum, copper, aluminum and titanium.

[0098] Exemplarily, the passivation layer 315 may be made of a silicon oxide layer, a silicon nitride layer, or a silicon oxide layer.

[0099] Exemplarily, the first planarization layer 316 and the second planarization layer 317 are made of organic insulating materials, such as resin.

[0100] In other possible embodiments, the driving backplane composed of the driving circuit layer 3 and the base 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 insulation layer, a first semiconductor layer, a second gate insulation layer, a second gate layer, an interlayer dielectric layer, a passivation layer, a first source and drain layer, and a first planarization layer stacked in sequence on the first surface A. Among them, the first source and drain layer is the above-mentioned source and drain layer. The materials used to make each layer are the same as those in the previous LTPO backplane part and will not be repeated here.

[0101] In the disclosed embodiments, the display panel is an OLED (Organic Light Emitting Diode) display panel or a QLED (Quantum Dot Light Emitting Diode) display panel. FIG11 illustrates an OLED display panel. The following provides an exemplary description of the light-emitting functional layer 4 of the OLED display panel shown in FIG12 .

[0102] For example, as shown in FIG12 , 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 the embodiment of the present disclosure can guide the organic light-emitting liquid material into the first collection tank 202.

[0103] Exemplarily, the first electrode layer 41 includes a plurality of first electrodes distributed in an array, and the plurality of first electrodes correspond one-to-one to the plurality of sub-pixels.

[0104] Exemplarily, the first electrode layer 41 is an anode layer, and is made of a metal material, such as gold, silver, etc., or made of a transparent conductive material, such as ITO (Indium tin oxide) or the like.

[0105] Exemplarily, the light-emitting layer 42 includes a plurality of light-emitting blocks distributed in an array, the plurality of light-emitting blocks corresponding one to one with the plurality of high-speeds, and the plurality of light-emitting blocks having different colors, thereby achieving a color display function. Optionally, the colors of the plurality of light-emitting blocks include red, green, and blue.

[0106] Exemplarily, the second electrode layer 43 is a whole layer structure. The first electrode, the light-emitting block and part of the second electrode layer form a light-emitting unit, and one light-emitting unit corresponds to one sub-pixel.

[0107] Exemplarily, the second electrode layer 43 is a cathode layer, and is made of a transparent conductive material, such as ITO.

[0108] 12 , the light-emitting functional layer 4 further 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 a plurality of light-emitting units.

[0109] Exemplarily, the light-emitting layer 42 is an organic light-emitting layer. The light-emitting layer 42 may include 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) stacked in sequence on the first surface A, wherein the light-emitting material layer is made of an organic light-emitting material. The drainage structure in the embodiment of the present disclosure can introduce, for example, HTL liquid material, HIL liquid material, etc. into the first collection tank 202. Moreover, 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 and other film layers are common layers. For the common layers, a full coating method is generally used to form the film. Therefore, the embodiment of the present disclosure is particularly suitable for separating the HIL, HTL and other film layers formed by a full coating method.

[0110] Figure 13 is a schematic cross-sectional view of the display area of ​​another display panel provided by an embodiment of the present disclosure. Compared to the embodiment shown in Figure 12, the display panel in Figure 13 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 direct the quantum dot light-emitting material liquid into the first collection tank 202.

[0111] Optionally, compared with the embodiment shown in FIG12 , in the embodiment shown in FIG13 , the light-emitting layer 42 is a quantum dot light-emitting layer. Optionally, in the embodiment shown in FIG13 , the HIL, HTL, EBL, light-emitting material layer, HBL, ETL, and EIL are sequentially stacked on the first surface A, wherein the light-emitting material layer is made of a quantum dot light-emitting material.

[0112] In addition, in the embodiment shown in FIG. 13 , the display substrate 1 further includes a color conversion layer 6 and a color filter layer 7 .

[0113] 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 corresponding to one of the color resist blocks. The orthographic projections of the plurality of color conversion units on the first surface A at least partially overlap with the orthographic projections of the plurality of color resist blocks on the first surface A.

[0114] FIG14 is a schematic diagram of the planar structure of another display panel provided by an embodiment of the present disclosure. As shown in FIG14 , the display substrate 1 further includes an opening area 13 and a second peripheral area 14, the display area 11 surrounds the opening area 13, and the second peripheral area 14 is located between the opening area 13 and the display area 11. The drainage structure 2 further includes a plurality of second cluster structures 21, and the plurality of second cluster structures 21 are located in the second peripheral area 14. The plurality of second cluster structures 21 are arranged around the opening area 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 along the circumference of the second collection groove, and 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 the embodiment of the present disclosure can also be applied to a display panel with an opening area. When manufacturing, for example, a light-emitting layer, the film layer formed by the droplets above the drainage structure in the second peripheral area 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 packaging effect of the display panel.

[0115] In other possible embodiments, the display substrate 1 further includes a plurality of opening areas 13 and a plurality of second peripheral areas 14. The display area 11 surrounds the plurality of opening areas 13. The plurality of second peripheral areas 14 correspond one-to-one with the plurality of opening areas 13, and the plurality of second peripheral areas 14 are located between the plurality of opening areas 13 and the display area 11. The drainage structure 2 further includes a plurality of second cluster structures 21. The plurality of second cluster structures 21 are located in the plurality of second peripheral areas 14 and are arranged around the plurality of opening areas 13.

[0116] Optionally, the shape of the opening area 13 may be a circle as shown in FIG14 , or may be a waisted circle, a rectangle, etc., which is not limited in the present disclosure.

[0117] Optionally, the design of the second collecting groove and the second rib structure in the second cluster structure 21 refers to the first collecting groove and the first rib structure in the aforementioned first cluster structure 20 .

[0118] Optionally, the arrangement of the plurality of second cluster structures 21 refers to the arrangement of the plurality of first cluster structures 20 .

[0119] FIG15 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present disclosure. As shown in FIG15 , the method includes:

[0120] In step S1 , a display substrate is provided, wherein the display substrate includes a display area and a first peripheral area located at an edge of the display area.

[0121] In step S2 , a drainage structure is fabricated on the first surface of the display substrate.

[0122] Among them, the drainage structure includes a plurality of first cluster structures, the plurality of first cluster structures are located in the first peripheral area, the plurality of first cluster structures are 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 along the circumference of the first collection groove, and the plurality of first rib structures are configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures.

[0123] The following is an exemplary description of step S2 using the structures shown in Figures 1 and 13 as an example. For example, step S2 may include:

[0124] In the first step, a light-shielding metal layer is deposited on the base substrate, and then the light-shielding metal layer is patterned to obtain a light-shielding layer, which is located in the display area.

[0125] The second step is to form a buffer layer on the light shielding layer by, for example, deposition. A first semiconductor material layer is formed on the buffer layer by, for example, deposition, and patterned to obtain a first active layer.

[0126] In the third step, an initial first gate insulating layer and a first gate material layer are sequentially formed 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 patterned to form a first gate layer. Optionally, the portion of the first active layer not covered by the first gate layer is subjected to a conductorization process to ensure good ohmic contact between the first active layer and the subsequently formed first source and drain electrode layers.

[0127] Step 4: forming an initial first insulating layer and a second gate material layer on the first gate layer in sequence by, for example, deposition, and patterning the second gate material layer to obtain a second gate layer.

[0128] Step 5: forming an initial second gate insulating layer and a second semiconductor material layer on the second gate layer in sequence by, for example, deposition, and patterning the second semiconductor material layer to obtain a second active layer.

[0129] Step 6: An initial third gate insulating layer and a third gate material layer are sequentially formed on the second active layer, for example, by deposition. The initial third gate insulating layer covers the second active layer. The third gate material layer is patterned to form a third gate layer. Optionally, the portion of the second active layer not covered by the third gate layer is conductively bonded to ensure good ohmic contact between the second active layer and the subsequently formed second source and drain electrode layer.

[0130] Step 7: Form an initial interlayer dielectric layer and an initial passivation layer on the third gate layer in sequence, for example, by deposition. A series of processes, including photoresist coating, exposure, etching, and stripping, are performed on the initial passivation layer to form multiple vias that expose the light shielding layer, the first active layer, and the second active layer. The initial first gate insulating layer is converted into a first gate insulating layer, and the initial first insulating layer is converted into a first insulating layer, the initial second gate insulating layer is converted into a second gate insulating layer, the initial third gate insulating layer is converted into a third gate insulating layer, the initial interlayer dielectric layer is converted into an interlayer dielectric layer, and the initial passivation layer is converted into a passivation layer.

[0131] Step 8: In the via hole obtained in step 7, a first source and drain layer is formed by adopting a series of processes such as deposition, photoresist coating, exposure, etching, and stripping.

[0132] In step 9, an initial first planarization layer is formed on the first source and drain electrode pattern layer by, for example, deposition. The initial first planarization layer is then patterned, and the initial first planarization layer located in the first peripheral region is removed. A series of steps, including photoresist coating, exposure, etching, and stripping, are performed to form a plurality of vias exposing the first source and drain electrode layer. Simultaneously, a first planarization layer is obtained from the initial first planarization layer.

[0133] In the tenth step, a second source-drain pattern layer is formed in the via hole obtained by etching in the ninth step and in the first peripheral area by adopting 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 area.

[0134] In the eleventh step, an initial second planarization layer is formed on the second source and drain pattern layer by, for example, deposition, and patterning is performed on the initial second planarization layer to remove the initial second planarization layer located in the first peripheral region to obtain a second planarization layer.

[0135] Step 12: Form a first electrode layer by, for example, deposition and patterning, the first electrode layer including a plurality of first electrodes, and form a pixel definition layer on the first electrode layer by, for example, deposition and patterning.

[0136] Step 13: Apply liquid HIL material by full coating, wherein the HIL material droplets above the drainage structure are guided into the first collecting tank by the first rib structure to form the HIL. The HTL and EBL are formed in sequence by the same method as forming the HIL.

[0137] Optionally, before forming the HIL, HTL, and EBL, a lyophobic film can be formed, for example, by deposition, on the surfaces of the plurality of first clustered structures distal from the first surface. 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 lyophobic properties of the first rib structure surface, thereby facilitating the first rib structure's ability to direct liquid droplets into the first collection tank.

[0138] Optionally, before the droplets dry, the droplets in the first collection tank can be subjected to an adsorption process to remove most of the droplets in the first collection tank. This leaves only a minimal amount of solute after the droplets dry, which improves the packaging quality of the display panel. For example, a syringe can be used to aspirate the droplets, and this method is convenient for mass production.

[0139] Optionally, after the droplets have dried, the droplets in the first collection tank are wiped, for example, using a cotton swab. Alternatively, the wiping process can be performed using a solvent such as an alcohol, acetone, or toluene, thereby dissolving the solute remaining in the first collection tank after the droplets have dried. Different solvents can be selected based on different membrane layers.

[0140] Step 14: Form a light-emitting layer using, for example, inkjet printing. The light-emitting layer includes a plurality of light-emitting blocks arranged in an array. Optionally, the plurality of red light-emitting blocks are formed in an array first, followed by the plurality of green light-emitting blocks, and finally the plurality of blue light-emitting blocks.

[0141] Step 15: Form HBL, ETL, and EIL in a manner similar to that in Step 13.

[0142] Step 16: Form a second electrode layer in the display area by deposition and patterning, and form an encapsulation layer by deposition, etc. The encapsulation layer covers the display area and the first peripheral area.

[0143] Optionally, the patterning process includes processes such as photoresist coating, exposure, development, etching, and stripping.

[0144] The materials of each layer are as described in the above embodiments and will not be described again here.

[0145] FIG16 is a schematic diagram of a method for producing a light-emitting layer by a full-coating method according to an embodiment of the present disclosure. Two display panels as shown in FIG16 , or more display panels, can be produced simultaneously. Accordingly, in steps 13 and 15 , the liquid material is coated on the surfaces of multiple display panels, 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 area 11 and the drainage structure 2 are subjected to an adsorption treatment or a wiping treatment. Optionally, multiple display panels are divided along a dividing line P before the encapsulation process.

[0146] An embodiment of the present disclosure further provides a display device, which includes any one of the aforementioned display panels and a power supply circuit, wherein the power supply circuit is used to supply power to the display panel.

[0147] Illustratively, the display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, or a navigator.

[0148] The display device has the same effects as the aforementioned display panel, which will not be described in detail here.

[0149] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A display panel, characterized in that: The display panel comprises a display substrate and a drainage structure, wherein the display substrate comprises a display area and a first peripheral area located at the edge of the display area, and the drainage structure is located on a first surface of the display substrate; The drainage structure includes a plurality of first cluster structures, wherein the plurality of first cluster structures are located in the first peripheral area, and the plurality of first cluster structures are arranged around the display area, each of the first cluster structures has a first collection groove, and the first cluster structure includes a plurality of first rib structures arranged along the circumference of the first collection groove, and the plurality of first rib structures are configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures.

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 collecting groove and a second end away from the first collecting groove. In the direction from the first end to the second end, the distance between two adjacent first rib structures in the circumferential direction gradually increases.

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

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

6. The display panel according to claim 4 or 5, characterized in that: The patterns formed by connecting the plurality of the second ends of each of the first cluster structures in sequence are the same; or, There are at least two of the plurality of first cluster structures in the plurality of first cluster structures. The shapes formed by connecting the ends in sequence are different.

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, and a distance between the first cluster structure group to which the first target rib structure belongs and the display area is smaller than a 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 distance between two adjacent first cluster structures is 2 μm to 8 μm.

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

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, the first rib structure has at least one first cross section, the first cross section is parallel to the first surface, and a width of the top surface is greater than a 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 10 μm to 500 μm.

12. The display panel according to any one of claims 1 to 5 and claim 7, characterized in that: The display substrate includes a base substrate, a driving circuit layer and a light-emitting functional layer stacked in sequence, 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 electrode layer, and the first rib structure is in the same layer as the source-drain electrode layer.

13. The display panel according to claim 12, characterized in that: 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.

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

15. The display panel according to any one of claims 1 to 5, claim 7 and claim 13, characterized in that: The display substrate further comprises 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 to the at least one opening area one by one, and the at least one second peripheral area is located between the at least one opening area and the display area; The drainage structure also includes a plurality of second cluster structures, wherein 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 of the second cluster structures has a second collection groove, and the second cluster structure includes a plurality of second rib structures arranged along the circumference of the second collection groove, and the plurality of second rib structures are configured to direct droplets to the second collection groove surrounded by the plurality of second rib structures.

16. A method for manufacturing a display panel, characterized in that: The method comprises: Providing a display substrate, the display substrate comprising a display area and a first peripheral area located at an edge of the display area; Making a drainage structure on the first surface of the display substrate; Among them, the drainage structure includes a plurality of first cluster structures, the plurality of first cluster structures are located in the first peripheral area, the plurality of first cluster structures are arranged around the display area, each of the first cluster structures has a first collection groove, and the first cluster structure includes a plurality of first rib structures arranged along the circumference of the first collection groove, and the plurality of first rib structures are configured to guide droplets to the first collection groove surrounded by the plurality of first rib structures.

17. A display device, characterized in that: The display device comprises a power supply circuit and a display panel according to any one of claims 1 to 15, wherein the power supply circuit supplies power to the display panel.

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