Display panel, display device, and manufacturing method of the display panel

Abstract

To provide a display panel of which a display performance is improved, a display device thereof, and a display panel manufacturing method thereof.SOLUTION: A display panel 10 comprises: a substrate 100; a first power supply signal line 200; a conductor 310 that contains a plurality of conductive parts 310, to which the conductor 310 and the first power supply signal line 200 are alternately connected; a pixel definition layer 400 which contains a first opening 420 that is provided to a pixel limited part 410 and a pixel limited part 410, and a second opening 430, and into which a positive projection of at least one part of the second opening 430 and the conductor 310 in the substrate 100 is overlapped; a light emitting layer 500 that is provided to the side where a conductive layer 300 of the substrate 100 is positioned, and contains a plurality of light emitting parts 510, and in which each light emitting part 510 of at least one part is positioned in the first opening 420; a weir part 600 that is provided to the substrate 100 and surrounds the conductor 310; and a first electrode 700 that is provided to the side separated from the light emitting layer 500 and the substrate 100 of the weir part 600, and is connected to the conductor 310 via the second opening 430.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present application relates to the technical field of display devices, and in particular to a display panel, a display device, and a method for manufacturing a display panel. [Background technology]

[0002] Organic light-emitting diode (OLED) displays, also known as organic electroluminescence displays (OLEDs), offer a number of advantages over conventional LCDs, including self-luminance, wide viewing angles, ultra-lightweight, ultra-thin, high brightness, low power consumption, and fast response. OLED displays boast a response speed 1,000 times faster than LCDs, making them extremely popular flat panel display products both at home and abroad, with broad application potential. Quantum dot (QD) materials boast high emission color purity, tunable emission wavelength, and material stability, making them particularly useful in the field of wide color gamut color displays.

[0003] Quantum dot light emitting diodes (QLEDs) are a new type of light emitting device. Due to their self-luminous properties that do not require an additional light source, narrow emission peaks, tunable emission colors, and high luminous efficiency, QLEDs are gradually becoming one of the future mainstream display technologies.

[0004] However, the display performance of current display products needs to be improved. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application aim to provide a display panel, a display device, and a manufacturing method for a display panel, and to improve the display performance of the display panel. [Means for solving the problem]

[0006] An embodiment of a first aspect of the present application provides a display panel including: a substrate; a first power supply signal line provided on the substrate; a conductive layer provided on the first power supply signal line and including a plurality of conductive portions, the conductive portions and the first power supply signal line being connected to each other; a pixel defining layer including a pixel limiting portion and a first opening and a second opening opened in the pixel limiting portion, wherein an orthogonal projection of the second opening on the substrate and an orthogonal projection of the conductive portions on the substrate at least partially overlap; an emitting layer provided on the side of the substrate where the conductive layer is located and including a plurality of light emitting portions, at least some of the light emitting portions being located within the first opening; a dam portion provided on the substrate and surrounding the conductive portion, the material of which is sparsely matched to that of the light emitting portions; and a first electrode provided on the side of the light emitting layer and the dam portion away from the substrate, the first electrode being connected to the conductive layer via the second opening.

[0007] According to an embodiment of the first aspect of the present application, the dam portion is located on the side of the pixel limiting portion away from the substrate, and is provided to surround the second opening.

[0008] According to any of the above embodiments of the first aspect of the present application, the pixel limiting portion includes a first sub-portion and a second sub-portion spaced apart from each other, the first opening is opened in the first sub-portion, the second opening is opened in the second sub-portion, and the dam portion is located on a side of the second sub-portion away from the substrate.

[0009] According to any of the above embodiments of the first aspect of the present application, the dam portion has a first surface away from the substrate, and the first sub-portion has a second surface away from the substrate, the first surface being located on the side of the second surface away from the substrate.

[0010] According to any of the above-described embodiments of the first aspect of the present application, the orthogonal projection of the dam portion on the substrate is located within the second opening, and the dam portion is in direct contact with the substrate via the second opening.

[0011] According to any one of the above-described embodiments of the first aspect of the present application, the pixel limiting portion has an inner wall surface facing the second opening, the inner wall surface being spaced apart from the dam portion.

[0012] According to any of the above-described embodiments of the first aspect of the present application, the display panel includes an overlapping connection region, the overlapping connection regions being distributed at intervals, and the conductive portion being located in the overlapping connection region.

[0013] According to any of the above-described embodiments of the first aspect of the present application, the dam portion is located in the overlap connection region.

[0014] According to any of the above-described embodiments of the first aspect of the present application, the plurality of conductive portions are distributed at intervals along the extending direction of the overlapping connection region.

[0015] According to any of the above-described embodiments of the first aspect of the present application, the orthogonal projection of the conductive portion on the substrate is circular.

[0016] According to any of the above-described embodiments of the first aspect of the present application, the orthogonal projection of the dam portion on the substrate has a circular ring shape.

[0017] According to any of the above-described embodiments of the first aspect of the present application, the overlapping connection region has a stripe shape, and the multiple overlapping connection regions are arranged side by side along a first direction and / or a second direction, and the first direction and the second direction intersect.

[0018] According to any of the above-described embodiments of the first aspect of the present application, the extension dimension of the overlapping connection region in the second direction is greater than the extension dimension in the first direction, and the multiple overlapping connection regions are arranged side by side along the first direction.

[0019] According to any of the above-described embodiments of the first aspect of the present application, the width of the overlapping connection region in the first direction is 10 μm to 50 μm, and the length of the overlapping connection region in the first direction is 10 μm or more.

[0020] According to any of the above-described embodiments of the first aspect of the present application, the distance between two adjacent overlap connection regions is 5 μm or more.

[0021] According to any of the above-described embodiments of the first aspect of the present application, the display panel further includes a display area, and the plurality of overlap connection areas are uniformly distributed within the display area.

[0022] According to any of the above embodiments of the first aspect of the present application, the overlap connection region is square.

[0023] According to any of the above-described embodiments of the first aspect of the present application, the distance between two adjacent overlap connection regions is 50 μm or less, or the gap between two adjacent overlap connection regions is 80 μm or more.

[0024] According to any of the above-described embodiments of the first aspect of the present application, the dam portion has a bottom surface facing the substrate and a side surface connected to the bottom surface and extending away from the substrate, and the included angle between the side surface and the bottom surface is 10 degrees or more and 70 degrees or less.

[0025] According to any of the above-described embodiments of the first aspect of the present application, the thickness d1 of the dam portion and the thickness d2 of the light-emitting portion satisfy d1≧15d2.

[0026] According to any of the above-described embodiments of the first aspect of the present application, the thickness d1 of the dam portion is 200 nm to 10 μm.

[0027] According to any of the above-described embodiments of the first aspect of the present application, the width of the dam portion is 2 μm to 10 μm.

[0028] According to any of the above-described embodiments of the first aspect of the present application, the conductive portion has a recessed groove formed on a surface facing the first electrode.

[0029] According to any of the above-described embodiments of the first aspect of the present application, a plurality of recessed grooves are provided at intervals.

[0030] According to any of the above-described embodiments of the first aspect of the present application, the groove is formed to extend in the first direction, and the plurality of grooves are arranged side by side along the second direction.

[0031] According to any of the above embodiments of the first aspect of the present application, the pixel definition layer may further include a second electrode layer located on a side facing the substrate, the second electrode layer including second electrodes provided corresponding to each of the first openings.

[0032] The conductive portion and the second electrode are provided in the same layer, or the substrate is further provided with a planarization layer, the planarization layer is located on the side of the second electrode layer away from the pixel definition layer, the conductive layer is located on the side of the planarization layer away from the second electrode layer, a through hole is opened in the planarization layer, and the first electrode is connected to each other via the through hole and the conductive portion.

[0033] According to any of the above-described embodiments of the first aspect of the present application, the conductive portion is contact-connected to the first power supply signal line, or the conductive layer is via-connected to the first power supply signal line.

[0034] According to any of the above-described embodiments of the first aspect of the present application, the dam portion has a surface remote from the substrate that is a hydrophobic and / or oleophobic low energy surface.

[0035] An embodiment of the second aspect of the present application further provides a display device including the display panel according to any one of the embodiments of the first aspect.

[0036] An embodiment of a third aspect of the present application further provides a method for manufacturing a display panel, including the steps of: providing a conductive material layer on a substrate, and patterning the conductive material layer to form first power signal lines; subsequently providing a conductive material layer on the substrate with the first power signal lines, and patterning the conductive material layer to form a conductive layer, the conductive layer including a plurality of conductive portions located on a side of the first power signal lines away from the substrate; providing a pixel defining material layer on the substrate, and patterning the pixel defining material layer to form first openings and second openings, so that at least some of the conductive portions are exposed from the second openings; providing a hydrophobic material layer on the substrate, and patterning the hydrophobic material layer to form dam portions surrounding the conductive portions; subsequently fabricating a light-emitting layer on the substrate, the light-emitting layer including a plurality of light-emitting portions, at least some of the light-emitting portions being located in the first openings; and subsequently fabricating first electrodes on the substrate, so that the first electrodes are connected to each other via the second openings and the conductive portions.

[0037] According to an embodiment of the third aspect of the present application, the display panel includes an overlapping connection region, the light-emitting portion includes a communicating opening located in the overlapping connection region, the conductive portion is provided in the overlapping connection region, the extension dimension of the overlapping connection region in a first direction is greater than the extension dimension in a second direction, and in a step of subsequently manufacturing a light-emitting layer on the substrate, a plurality of nozzles arranged side by side are moved in the first direction to apply a light-emitting material to the substrate, and one or more adjacent nozzles are closed for a predetermined period of time, thereby forming the light-emitting portion including the communicating opening in the overlapping connection region. [Effects of the Invention]

[0038] In a display panel according to an embodiment of the present application, the display panel includes a substrate, a first power signal line, a conductive layer, a pixel defining layer, a light-emitting layer, a dam portion, and a first electrode. The light-emitting portion of the light-emitting layer is disposed within a first opening in the pixel defining portion, thereby reducing color crosstalk between different light-emitting portions. The pixel defining portion further includes a second opening, and the orthogonal projection of the second opening on the substrate at least partially overlaps with the orthogonal projection of the conductive portion on the substrate, thereby exposing the conductive portion through the second opening, and allowing the first electrode and the conductive portion to be connected to each other through the second opening. The conductive portion of the conductive layer and the first power signal line are connected to each other, thereby reducing the problem of excessive voltage drop across the first electrode and improving the display effect of the display panel. The substrate further includes a dam portion surrounding the conductive portion. The material of the dam portion and the material of the light-emitting portion are sparsely mixed, and the barrier and hydrophobic properties of the dam portion prevent the material of the light-emitting portion from overflowing onto the conductive portion during manufacturing of the light-emitting portion, thereby improving the yield of connection between the first electrode and the conductive portion, better resolving the voltage drop problem of the first electrode, and improving the display effect of the display panel. Therefore, the embodiment of the present application can improve the display performance of the display panel by providing the dam portion. [Brief explanation of the drawings]

[0039] Other features, objects, and advantages of the present application will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings, in which the same or similar reference numerals represent the same or similar features.

[0040] [Figure 1] 1 is a structural schematic diagram of a display panel according to an embodiment of the present application; [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 in another example. [Figure 4]1 is a partially enlarged schematic diagram of the structure of a display panel according to an embodiment of the present application. [Figure 5] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 in yet another example. [Figure 6] 3A and 3B are structural schematic diagrams of conductive portions and dam portions of a display panel according to an embodiment of the present application. [Figure 7] 10A and 10B are structural schematic diagrams of conductive portions and dam portions of a display panel according to another embodiment of the present application. [Figure 8] 10A and 10B are structural schematic diagrams of conductive portions and dam portions of a display panel according to another embodiment of the present application. [Figure 9] FIG. 2 is a structural schematic diagram of a display panel according to another embodiment of the present application. [Figure 10] 3 is an enlarged schematic view of the structure of a dam portion of a display panel according to an embodiment of the present application. FIG. [Figure 11] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 in yet another example. [Figure 12] FIG. 2 is a partial cross-sectional view of a conductive portion of a display panel according to an embodiment of the present application. [Figure 13] FIG. 2 is a partially enlarged view of a conductive portion of a display panel according to an embodiment of the present application. [Figure 14] FIG. 10 is a partial cross-sectional view of a conductive portion of a display panel according to another embodiment of the present application. [Figure 15] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 in yet another example. [Figure 16] 2 is a structural schematic diagram of a light-emitting portion of a display panel according to an embodiment of the present application. FIG. [Figure 17] 1 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present application. [Figure 18] 1A to 1C are structural schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the present application. [Figure 19] 1A to 1C are structural schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the present application. [Figure 20] 1A to 1C are structural schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the present application. [Figure 21] 1A to 1C are structural schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the present application. [Figure 22]1A to 1C are structural schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0041] The following describes in detail the features and exemplary embodiments of each aspect of the present application. In the following detailed description, many specific details are provided to provide a thorough understanding of the present application. However, as will be apparent to those skilled in the art, the present application may be practiced without the need for some of these specific details. The following description of the embodiments is provided solely to provide an exemplary understanding of the present application. In the drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessary ambiguity, and the dimensions of some structures may be exaggerated for clarity. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner into one or more embodiments.

[0042] In the description of this application, unless otherwise specified, the term "plurality" means two or more, and any orientation or positional relationship indicated by the terms "up," "down," "left," "right," "inside," "outside," etc. is merely for the purpose of simplifying the description and explanation of this application and does not indicate or imply that the referenced device or component must have a particular orientation or be constructed or operated in a particular orientation, and therefore should not be construed as a limitation on this application. Additionally, the terms "first," "second," etc. are merely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0043] All directional terms used in the following description refer to the directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, unless otherwise specified, the terms "attach" and "connect" should be understood in a broad sense, and may refer to, for example, fixed connection, detachable connection, integral connection, direct connection, or indirect connection. Those skilled in the art can understand the specific meaning of the above terms in the present application based on specific circumstances.

[0044] For a better understanding of the present invention, a display panel, a display device, and a manufacturing method of a display panel according to an embodiment of the present invention will be described in detail below with reference to FIGS.

[0045] 1 and 2, FIG. 1 is a structural schematic diagram of a display panel 10 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, for example.

[0046] 1 and 2 , an embodiment of a first aspect of the present application provides a display panel 10, which includes a substrate 100, a first power signal line 200, a conductive layer 300, a pixel defining layer 400, an emitting layer 500, a dam portion 600, and a first electrode 700. The first power signal line 200 is disposed on the substrate 100, the conductive layer 300 is disposed on the first power signal line 200, and includes a plurality of conductive portions 310, the conductive portions 310 are connected to the first power signal line 200, the pixel defining layer 400 includes a pixel limiting portion 410, and a first opening 420 and a second opening 430 opened in the pixel limiting portion 410, the orthogonal projection of the second opening 430 on the substrate 100 at least partially overlaps with the orthogonal projection of the conductive portion 310 on the substrate 100, and the emitting layer 500 is The light-emitting layer 500 is provided on the side of the substrate 100 where the conductive layer 300 is located, the light-emitting layer 500 includes a plurality of light-emitting sections 510, at least some of the light-emitting sections 510 are located within the first opening 420, the dam section 600 is provided on the substrate 100 and surrounds the conductive section 310, the material of the dam section 600 and the material of the light-emitting section 510 are sparse, and the first electrode 700 is provided on the side of the light-emitting layer 500 and the dam section 600 away from the substrate 100 and is connected to the conductive layer 300 via the second opening 430.

[0047] The display panel 10 according to the embodiment of the present disclosure includes a substrate 100, a first power signal line 200, a conductive layer 300, a pixel defining layer 400, an emitting layer 500, a dam portion 600, and a first electrode 700. The emitting portion 510 of the emitting layer 500 is disposed within a first opening 420 formed in the pixel defining portion 410, which can reduce color crosstalk between different emitting portions 510. The pixel defining portion 410 further includes a second opening 430, and the orthogonal projection of the second opening 430 on the substrate 100 at least partially overlaps with the orthogonal projection of the conductive portion 310 on the substrate 100, allowing the conductive portion 310 to be exposed through the second opening 430. The first electrode 700 and the conductive portion 310 may be connected to each other through the second opening 430. Because the conductive portion 310 of the conductive layer 300 and the first power signal line 200 are connected to each other, the first electrode 700 may be connected to the first power signal line 200 via the conductive portion 310, which can alleviate the problem of excessive voltage drop across the first electrode 700 and improve the display effect of the display panel 10. The substrate 100 is further provided with a dam portion 600, which surrounds the conductive portion 310 and has a low interfacial relationship with the material of the light-emitting portion 510. During manufacturing of the light-emitting portion 510, the barrier and hydrophobic properties of the dam portion 600 can prevent the material of the light-emitting portion 510 from overflowing onto the conductive portion 310 and affecting the electrical connection between the first electrode 700 and the conductive portion 310. This improves the yield of connection between the first electrode 700 and the conductive portion 310, better alleviates the problem of voltage drop across the first electrode 700, and improves the display effect of the display panel 10. Therefore, in the embodiment of the present application, the dam portion 600 is provided, thereby improving the display performance of the display panel 10.

[0048] The material of the dam portion 600 and the material of the light-emitting portion 510 being sparse means that the material of the dam portion 600 and the material of the light-emitting portion 510 are unlikely to dissolve together, the material of the light-emitting portion 510 is unlikely to remain in the dam portion 600, and the material of the dam portion 600 and the material of the light-emitting portion 510 repel each other. For example, the material of the dam portion 600 contains a hydrophobic material, and the material of the light-emitting portion 510 contains water, so that the material of the light-emitting portion 510 is unlikely to remain in the dam portion 600.

[0049] Optionally, the dam portion 600 has a hydrophobic and / or oleophobic low-energy surface, and when manufacturing the light-emitting portion 510, the barrier and hydrophobic effects of the dam portion 600 can prevent the material of the light-emitting portion 510 from overflowing into the conductive portion 310 and affecting the electrical connection between the first electrode 700 and the conductive portion 310, thereby improving the connection yield between the first electrode 700 and the conductive portion 310.

[0050] The first power supply signal line 200 may be, for example, a low-level power supply signal line or a negative voltage power supply signal line.

[0051] The conductive layer 300 may be provided adjacent to the film layer in which the first power signal line 200 is located, and the conductive portion 310 and the first power signal line 200 may be contact-connected to each other, or another film layer may be provided between the conductive layer 300 and the first power signal line 200, and the conductive portion 310 and the first power signal line 200 may be via-connected.

[0052] There are several ways to form the light-emitting unit 510. For example, the material of the light-emitting unit 510 includes ink, and the light-emitting unit 510 is fabricated on the pixel defining layer 400 by processes such as inkjet printing and coating. The light-emitting unit 510 may be a quantum dot light-emitting diode (QD) or, in other embodiments, the light-emitting unit 510 may be an organic light-emitting diode (OLED), etc.

[0053] The weir portion 600 can be installed in a variety of ways. For example, the weir portion 600 may be made of a hydrophobic material, such as, but not limited to, polyimide, epoxy resin, acrylic resin, silicone resin, silicon nitride, and silicon oxide. Alternatively, the weir portion 600 may be made of a highly hydrophobic and / or oleophobic material, such as a perfluoromethyl group, a perfluoroethyl group, or a perfluorobenzene-based material. The weir portion 600 has good hydrophobic properties, which can alleviate the problem of the material of the light-emitting portion 510 overflowing into the conductive portion 310. The hydrophobic material has hydrophobic properties, and the hydrophobic properties referred to here refer to "hydrophobic and oleophobic" properties, which indicate the property of liquids not adhering to the weir portion 600. The hydrophobic properties do not simply mean that the weir portion 600 is not easily contacted with water, but rather that it is not easily contacted with liquids. The material of the dam portion 600 includes a hydrophobic material so that the surface of the dam portion 600 away from the substrate 100 is a low energy surface.

[0054] The dam portion 600 may be disposed at a plurality of positions. For example, in some alternative embodiments, the dam portion 600 is disposed on the side of the pixel limiting portion 410 away from the substrate 100 and surrounds the second opening 430 .

[0055] In these alternative embodiments, the dam portion 600 is provided directly on the pixel limiting portion 410 so that the height of the dam portion 600 relative to the substrate 100 is greater than the height of the pixel limiting portion 410 relative to the substrate 100, and the dam portion 600 protrudes from the pixel limiting portion 410. In addition, the dam portion 600 is provided to surround the second opening 430, and when the luminescent material overflows to the outer periphery of the dam portion 600, the dam portion 600 can block the luminescent material to the outside of the second opening 430, which can better prevent the luminescent material from overflowing into the conductive portion 310 and affecting the electrical connection between the first electrode 700 and the first power signal line 200.

[0056] In some alternative embodiments, referring to Figures 1 and 3, the pixel limiting portion 410 includes a first sub-portion 411 and a second sub-portion 412 spaced apart from each other, the first opening 420 is provided in the first sub-portion 411, the second opening 430 is provided in the second sub-portion 412, and the dam portion 600 is located on the side of the second sub-portion 412 away from the substrate 100.

[0057] In these alternative embodiments, the pixel limiting portion 410 is divided into a first sub-portion 411 and a second sub-portion 412, and the first sub-portion 411 and the second sub-portion 412 are spaced apart from each other, with a gap between the first sub-portion 411 and the second sub-portion 412. When the luminescent material overflows from the first opening 420 of the first sub-portion 411 to the second opening 430 of the second sub-portion 412, at least a portion of the luminescent material overflows into the gap between the first sub-portion 411 and the second sub-portion 412. By accommodating the overflowed luminescent material in the gap, the volume of the luminescent material overflowing to the side of the weir portion 600 away from the second opening 430 can be further reduced, and the luminescent material overflowing into the conductive portion 310, which may affect the electrical connection between the first electrode 700 and the first power signal line 200, can be prevented.

[0058] There are several ways to set the shapes of the first sub-portion 411 and the second sub-portion 412. For example, as shown in Figures 3 and 4, the first sub-portion 411 is annular, and the first opening 420 is located within the annular first sub-portion 411. And / or the second sub-portion 412 is annular, and the second opening 430 is located within the annular second sub-portion 412, and the plurality of first sub-portions 411 and the plurality of second sub-portions 412 are distributed at intervals on the substrate 100.

[0059] Optionally, the dam portion 600 has a first surface 610 away from the substrate 100, and the first sub-portion 411 has a second surface 401 away from the substrate 100, with the first surface 610 being located on the side of the second surface 401 away from the substrate 100.

[0060] In these alternative embodiments, the dam portion 600 protrudes from the first sub-portion 411 in a direction away from the substrate 100, i.e., the first surface 610 protrudes from the second surface 401, and the height of the dam portion 600 from the substrate 100 is greater than the height of the first sub-portion 411 from the substrate 100. When the luminescent material is placed in the first opening 420, the barrier of the dam portion 600 prevents the luminescent material from dripping onto the first surface 610 of the dam portion 600 and overflowing into the second opening 430, thereby further enhancing the hydrophobic effect of the dam portion 600 and improving the connection yield between the first electrode 700 and the conductive portion 310.

[0061] In some alternative embodiments, as shown in FIG. 5, the orthogonal projection of the dam portion 600 on the substrate 100 is located within the second opening 430, and the dam portion 600 is in direct contact with the substrate 100 through the second opening 430.

[0062] In these optional embodiments, the dam portion 600 falls into the second opening 430, and the dam portion 600 is arranged to surround the conductive portion 310 within the second opening 430, and there is no pixel limiting portion 410 between the dam portion 600 and the substrate 100, which simplifies the manufacturing method of the dam portion 600.

[0063] Optionally, the opening size of the second opening 430 is larger than the size of the exposed conductive portion 310, i.e., the orthogonal projection of the conductive portion 310 on the substrate 100 is located within the orthogonal projection of the second opening 430 on the substrate 100, ensuring that a sufficient area of ​​the conductive portion 310 can be exposed.

[0064] Optionally, the dam portion 600 surrounds the conductive portion 310 exposed from the second opening 430. The dam portion 600 and the conductive portion 310 may be spaced apart, i.e., the conductive portion 310 is located within an area surrounded by the dam portion 600, and the conductive portion 310 and the dam portion 600 are spaced apart. Alternatively, the dam portion 600 and the conductive portion 310 are adjacent to each other, and the dam portion 600 surrounds the conductive portion 310 and is connected to the edge of the conductive portion 310. Alternatively, some of the dam portions 600 are connected to the conductive portion 310 in an overlapping manner.

[0065] Optionally, the pixel limiting portion has an inner wall surface facing the second opening, the inner wall surface being spaced apart from the dam portion.

[0066] In these optional embodiments, there is a gap between the inner wall surface of the pixel limiting portion 410 facing the second opening 430 and the dam portion 600, and when the luminescent material overflows from the first opening 420 to the second opening 430, a partial luminescent material remains in the gap, thereby reducing the luminescent material overflowing onto the upper surface of the dam portion 600, better improving the hydrophobic effect of the dam portion 600, and improving the connection yield between the first electrode 700 and the conductive portion 310.

[0067] Alternatively, when the dam portion 600 is located within the second opening 430, and when the dam portion 600 and the pixel limiting portion 410 are both provided on the substrate 100, the dam portion 600 and the pixel limiting portion 410 may be of the same height, or as shown in FIG. 5, the height of the dam portion 600 is lower than that of the pixel limiting portion 410, i.e., the first surface 610 is located on the side where the second surface 401 faces the substrate 100, or as shown in FIG. 6, the height of the dam portion 600 is higher than that of the pixel limiting portion 410, i.e., the first surface 610 is located on the side where the second surface 401 faces away from the substrate 100, thereby achieving better hydrophobic performance.

[0068] In some alternative embodiments, as shown in FIGS. 1 and 2, the display panel 10 includes overlap connection areas DA, where a plurality of overlap connection areas DA are distributed at intervals, and the conductive portions 310 are located in the overlap connection areas DA.

[0069] In these alternative embodiments, the display panel 10 is provided with an overlapping connection area DA, and the conductive portion 310 is provided in the overlapping connection area DA. When manufacturing the light-emitting portion 510 using a process such as inkjet printing or coating, the problem of the light-emitting material overflowing onto the conductive portion 310 can be improved by controlling components such as an inkjet printing nozzle so as not to spray the light-emitting material onto the substrate 100 in the overlapping connection area DA.

[0070] Optionally, the dam portion 600 is located in the overlap connection region DA, which can better alleviate the problem of the light emitting material overflowing onto the conductive portion 310 in the overlap connection region DA.

[0071] Optionally, the plurality of conductive portions 310 are distributed at intervals along the extension direction of the overlapping connection region DA. By providing the plurality of conductive portions 310 in the same overlapping connection region DA, the first electrode 700 is electrically connected to the first power supply signal line 200 by the plurality of conductive portions 310, which can further improve the yield of the connection between the first electrode 700 and the first power supply signal line 200. When the overlapping connection region DA extends along the second direction Y as shown in FIG. 1 , the conductive portions 310 may be distributed at intervals along the second direction Y.

[0072] Alternatively, as shown in FIG. 7, the orthogonal projection of the conductive portion 310 on the substrate 100 is circular, which allows the luminescent material to spread to the outer periphery of the conductive portion 310, thereby better alleviating the problem of the luminescent material easily overflowing onto the conductive portion 310.

[0073] Alternatively, as shown in FIG. 7, the orthogonal projection of the dam portion 600 on the substrate 100 is annular, so that the light-emitting material spreads to the outer periphery of the dam portion 600 and is less likely to overflow onto the conductive portion 310.

[0074] In another embodiment, as shown in Figures 8 and 9, the orthogonal projection of the conductive portion 310 on the substrate 100 may be a polygon, for example, a triangle, a square, etc., and the shape of the dam portion 600 matches the shape of the conductive portion 310, and the orthogonal projection of the dam portion 600 on the substrate 100 is a polygonal ring.

[0075] In some alternative embodiments, still referring to Fig. 1, the overlap connection region DA has a stripe shape, and the overlap connection regions DA are arranged side by side along a first direction X and / or a second direction Y, and the first direction X and the second direction Y intersect. Fig. 1 shows, as an example, the overlap connection region DA extending in the first direction X, and the overlap connection regions DA arranged side by side along the second direction Y. In other embodiments, the overlap connection region may extend along the second direction Y, and the overlap connection regions DA may be arranged side by side along the first direction X.

[0076] In these optional embodiments, the overlapping connection area DA has a stripe shape, and when manufacturing the light-emitting section 510 by a process such as coating, it is easy to form a long stripe-shaped overlapping connection area DA by closing one or two adjacent nozzle members, thereby facilitating the manufacturing and molding of the display panel 10.

[0077] Optionally, the extension dimension of the overlap connection region DA in the second direction Y is larger than the extension dimension in the first direction X, and the multiple overlap connection regions DA are arranged side by side along the first direction X. As described above, the overlap connection region DA has a stripe shape, and the multiple stripe-shaped overlap connection regions DA are arranged side by side along the first direction X, and by closing one or more sets of nozzles among them, the multiple overlap connection regions DA arranged side by side can be formed.

[0078] For example, the light emitting portion 510 is formed by a coating process, in which the material of the light emitting portion 510 is accommodated in a container having a plurality of nozzle members, which are arranged in a row along a first direction X, and then the plurality of nozzle members are moved along a second direction Y, and while moving, the material of the light emitting portion 510 is sprayed onto the responsive substrate, and the first direction X and the second direction Y intersect, for example, the first direction X and the second direction Y are perpendicular, thereby realizing large-area coating of the material of the light emitting portion 510. During the spraying process, one or more nozzles are closed to form an overlapping connection area DA where the material of the light emitting portion 510 is not provided, and the manufacturing method is simple and easy to operate.

[0079] Optionally, the width of the overlap connection region DA in the first direction X is 10 μm-50 μm, and the length of the overlap connection region DA in the second direction Y is 10 μm or more. When the dimensions of the overlap connection region DA are within the above range, it becomes easy to form the overlap connection region DA by closing the nozzle, and a large installation area can be provided for the conductive portion 310, facilitating interconnection between the first electrode 700 and the conductive portion 310.

[0080] Optionally, the distance between two adjacent overlap connection regions DA is 5 μm or more, which can improve not only the problem that a distance between two adjacent overlap connection regions is too small, which affects the placement of the light emitting unit 510 and the light emitting effect of the display panel 10, but also the problem that a distance between two adjacent overlap connection regions DA is too large, which affects the electrical connection between the first electrode 700 and the conductive unit 310.

[0081] In some alternative embodiments, as shown in FIG. 10, the display panel 10 further includes a display area AA, and the multiple overlap connection areas DA are uniformly distributed within the display area AA.

[0082] In these embodiments, the overlapping connection area DA is uniformly distributed in a dotted manner so that the plurality of conductive parts 310 can be uniformly distributed in the display area AA, thereby improving the yield of overlapping connections between the first electrodes 700 and the conductive parts 310.

[0083] In these alternative embodiments, light-emitting material can be printed onto the substrate 100 by a pixel-level printing device to form the light-emitting portion 510.

[0084] Optionally, the shape of the overlap connection area DA may be square, which is convenient for manufacturing and molding the overlap connection area. Optionally, the distance between two adjacent overlap connection areas DA is 50 μm or less, which allows the light-emitting material to be printed by a pixel-level printing device. Alternatively, the distance between two adjacent overlap connection areas DA is 80 μm or more, which allows the light-emitting material to be printed by a non-pixel-level printing device.

[0085] For example, when manufacturing the light-emitting section 510, a pixel-level printing device can be used to print the light-emitting material on a predetermined substrate, and during printing, the location of the overlapping connection area DA is avoided to form an overlapping connection area DA where the light-emitting material is not applied.

[0086] There are a number of configurations for the shape of the dam portion 600, and the dam portion 600 may be provided with a uniform cross section in the direction away from the substrate 100.

[0087] Alternatively, in another embodiment, as shown in Figures 2 and 11, the dam portion 600 has a bottom surface 620 facing the substrate 100, a top surface (i.e., first surface 610) away from the substrate 100, and a side surface 630 connecting the top surface and the bottom surface 620, i.e., the side surface 630 is connected to the bottom surface 620 and extends away from the substrate 100, and the included angle b between the side surface 630 and the bottom surface 620 is greater than or equal to 10 degrees and less than or equal to 70 degrees.

[0088] In these optional embodiments, the included angle b between the side surface 630 and the bottom surface 620 is between 10 degrees and 70 degrees, which can reduce the distribution area of ​​the dam portion 600 and improve the problem that an included angle that is too large affects the continuity of the first electrode 700 and makes the first electrode 700 prone to breakage on the outer periphery of the dam portion 600.

[0089] In some alternative embodiments, the thickness d1 of the dam portion 600 and the thickness d2 of the light-emitting portion 510 satisfy d1≧15d2.

[0090] In these alternative embodiments, when d1 and d2 satisfy the above relationship, the thickness d1 of the dam portion 600 is too small, which affects the barrier function of the dam portion 600 against the luminescent material, and the hydrophobic effect can be further enhanced.

[0091] Optionally, the thickness d1 of the dam portion 600 is 200 nm-10 μm. When the thickness of the dam portion 600 is within this range, the problem of the dam portion 600 having an excessively small thickness d1 affecting the barrier function of the dam portion 600 for the light-emitting material can be alleviated, and the problem of the dam portion 600 having an excessively large thickness d1 affecting the continuity of the first electrode 700 can be alleviated, thereby alleviating the problem of the first electrode 700 being easily broken on the outer periphery of the dam portion 600.

[0092] Optionally, the width of the dam portion 600 is 2 μm-10 μm. When the width of the dam portion 600 is within this range, it is possible to prevent the hydrophobic effect from being affected when the width of the dam portion 600 is too small, and also to prevent the display effect of the display panel 10 from being affected by the distribution area of ​​the light-emitting portion 510 when the width of the dam portion 600 is too large.

[0093] There are several ways to install the conductive portion 310, and in some alternative embodiments, as shown in Figures 12 and 13, the conductive portion 310 has a groove 311 on the surface facing the first electrode 700.

[0094] In these alternative embodiments, if the dam portion 600 does not completely block the luminescent material and some of the luminescent material overflows from the dam portion 600 onto the conductive portion 310, the luminescent material will easily flow into the groove 311 provided adjacent to the dam portion 600, and the groove 311 can prevent some of the luminescent material from continuing to flow into the central region of the conductive portion 310, thereby connecting the first electrode 700 to the central region of the conductive portion 310 and the conductive portion 310, improving the connection yield between the first electrode 700 and the conductive portion 310. Furthermore, when the luminescent material is located in the groove 311, the protrusions 312 located on both sides of the groove 311 can be exposed from the groove 311, making it less likely that the protrusions 312 will be covered by the luminescent material, improving the connection yield between the first electrode 700 and the conductive portion 310.

[0095] There are several ways to provide the grooves 311, for example, a plurality of grooves 311 can be provided on the surface of the weir portion 600, which can enhance the hydrophobic effect of the surface of the conductive portion 310.

[0096] 14, the groove 311 is formed to extend in the first direction X, and a plurality of the grooves 311 are arranged side by side in the second direction Y. By providing a plurality of the grooves 311 arranged side by side, the hydrophobic effect can be further enhanced.

[0097] Optionally, the conductive portion 310 has a protrusion 312 on a surface facing away from the substrate 100, and a groove 311 is formed between two adjacent protrusions 312. In some optional embodiments, the display panel 10 further includes a second electrode layer 800, which is located on a side of the pixel definition layer 400 facing the substrate 100, and which includes a second electrode 810 provided corresponding to each first opening 420.

[0098] In these alternative embodiments, the second electrode 810 and the first electrode 700 interact with each other to drive the light-emitting unit 510 to emit light. One of the first electrode 700 and the second electrode 810 is an anode, and the other is a cathode. In the present embodiment, the first electrode 700 is exemplified as a cathode, and the second electrode 810 is exemplified as an anode.

[0099] 3, when the display panel 10 includes the second electrode 810, the conductive portion 310 and the second electrode 810 may be provided in the same layer, which allows the conductive portion 310 and the second electrode 810 to be manufactured and shaped in the same process step, thereby simplifying the manufacturing process of the display panel 10. In this case, the conductive portion 310 and the first power signal line 200 may be connected by a via.

[0100] In some other embodiments, as shown in FIG. 15 , the substrate 100 further includes a planarization layer 900, the planarization layer 900 is located on the side of the second electrode layer 800 away from the pixel definition layer 400, the conductive layer 300 is located on the side of the planarization layer 900 away from the second electrode layer 800, a through hole 910 is opened in the planarization layer 900, and the first electrodes 700 are connected to each other via the through hole 910 and the conductive portion 310.

[0101] In these alternative embodiments, the conductive portion 310 and the second electrode 810 are provided in different layers, the conductive portion 310 is located on the side where the second electrode 810 faces the substrate 100, a through hole 910 is opened in the planarization layer 900, the through hole 910 and the second opening 430 communicate with each other, and the first electrode 700 is pre-cured and connected via the through hole 910 and the conductive portion 310. In this case, the conductive portion 310 and the first power supply signal line 200 may be connected via a via. For example, the conductive portion 310 and the first power supply signal line 200 may be located in different film layer structures, and further, the first power supply signal line 200 may be located in the film layer structure on the side where the conductive layer 300 faces the substrate 100, thereby enabling the conductive portion 310 and the first power supply signal line 200 to be connected via a via. Alternatively, the conductive portion 310 and the first power supply signal line 200 are located in adjacent film layer structures, and the conductive portion 310 and the first power supply signal line 200 are directly contact-connected, thereby improving the connection yield between the conductive portion 310 and the first power supply signal line 200.

[0102] The light-emitting unit 510 may be formed in various ways. Optionally, as shown in FIG. 16 , the light-emitting unit 510 may include a hole injection layer 511, a hole transport layer 512, and a light-emitting material layer 513, which are stacked together. The light-emitting material layer 513 may be a quantum dot material, and one of the hole injection layer 511 and the hole transport layer 512 may be formed by depositing a corresponding ink on the substrate 100 by a process such as inkjet printing or coating. In the display panel 10 according to the embodiment of the present application, the presence of the dam portion 600 can prevent ink from overflowing into the hydrophobic overlapping portion during the manufacturing of the hole injection layer 511 and / or the hole transport layer 512, thereby affecting the electrical connection between the first electrode 700 and the first power signal line 200. Optionally, the light-emitting unit 510 may further include an electron transport layer 514, which is disposed between the first electrode 700 and the light-emitting material layer 513.

[0103] An embodiment of the second aspect of the present application further provides a display device including any one of the display panels 10 according to the embodiments of the first aspect. Since the display device according to the embodiment of the second aspect of the present application includes the display panel 10 according to any one of the embodiments of the first aspect, the display device according to the embodiment of the second aspect of the present application has the beneficial effects of the display panel 10 according to any one of the embodiments of the first aspect, and the description thereof will be omitted here.

[0104] The display device in the embodiments of the present application includes, but is not limited to, devices with display functions such as mobile phones, personal digital assistants (abbreviated as PDA), tablet computers, e-books, televisions, gates, smart landlines, and consoles.

[0105] An embodiment of the third aspect of the present application further provides a method for manufacturing a display panel 10, which may be the display panel 10 of any of the embodiments of the first aspect described above. Referring to Figures 1 to 17, the method for manufacturing the display panel 10 includes the following steps:

[0106] In step S01, as shown in FIG. 18, a conductive material layer is provided on the substrate 100, and the conductive material layer is patterned to form the first power supply signal line 200.

[0107] In step S02, as shown in FIG. 19 , a conductive material layer is provided on the substrate 100 with the first power supply signal line 200, and the conductive material layer is patterned to form a conductive layer 300, which includes a plurality of conductive portions 310 located on the side of the first power supply signal line 200 away from the substrate 100.

[0108] Alternatively, when the conductive portion 310 and the first power signal line 200 are located in an adjacent film layer structure and are directly contact-connected to each other, a conductive material layer can be directly disposed on the substrate 100 with the first power signal line 200, and the conductive material layer can be patterned to form the conductive layer 300.

[0109] Alternatively, if the conductive portion 310 and the first power signal line 200 are located in different film layer structures and are connected to each other by a via, before step S02, an insulating material layer is further provided on the substrate 100 with the first power signal line 200, and the insulating material is patterned to form a via. In step S02, a conductive material layer is provided following the insulating material layer, and the conductive material layer is patterned to form the conductive layer 300.

[0110] In step S03, as shown in FIG. 20, a pixel defining material layer is deposited on the substrate 100, and the pixel defining material layer is patterned to form a first opening 420 and a second opening 430, and at least a portion of the conductive portion 310 is exposed through the second opening 430.

[0111] In step S04, as shown in FIG. 21, a hydrophobic material layer is provided on substrate 100, and the hydrophobic material layer is patterned to form dam portion 600 surrounding conductive portion 310.

[0112] Alternatively, as described above, the dam portion 600 may be located in the pixel limiting portion 410 , or the dam portion 600 may be located in the substrate 100 exposed through the second opening 430 .

[0113] In step S05, as shown in FIG. 22, the light-emitting layer 500 is subsequently formed on the substrate 100, and the light-emitting layer 500 includes a plurality of light-emitting portions 510, at least some of which are located in the first openings 420.

[0114] In step S06, as shown in FIG. 6, first electrodes 700 are subsequently formed on the substrate 100, and the first electrodes 700 are connected to each other via the second openings 430 and the conductive portions 310.

[0115] In the display panel 10 manufactured by the method according to the embodiment of the present application, the light-emitting portion 510 of the light-emitting layer 500 is disposed within a first opening 420 formed in the pixel limiting portion 410, thereby improving the color crosstalk problem between different light-emitting portions 510. The pixel limiting portion 410 further includes a second opening 430, and the orthogonal projection of the second opening 430 on the substrate 100 at least partially overlaps with the orthogonal projection of the conductive portion 310 on the substrate 100, thereby exposing the conductive portion 310 through the second opening 430. The first electrode 700 and the conductive portion 310 may be connected to each other through the second opening 430. The conductive portion 310 of the conductive layer 300 is connected to the first power signal line 200, and thus the first electrode 700 can be connected to the first power signal line 200 through the conductive portion 310. This improves the problem of excessive voltage drop across the first electrode 700 and improves the display effect of the display panel 10. In addition, the substrate 100 is further provided with a dam portion 600, which is provided to surround the conductive portion 310. During the manufacturing of the light-emitting portion 510, the barrier effect of the dam portion 600 can prevent the material of the light-emitting portion 510 from overflowing onto the conductive portion 310 and affecting the electrical connection between the first electrode 700 and the conductive portion 310, thereby improving the connection yield between the first electrode 700 and the conductive portion 310, better alleviating the voltage drop problem of the first electrode 700, and improving the display effect of the display panel 10. Therefore, the embodiment of the present application can improve the display performance of the display panel 10 by providing the dam portion 600.

[0116] Optionally, as described above, the display panel 10 includes an overlapping connection area DA. Optionally, the light-emitting unit 510 includes a communication opening located in the overlapping connection area DA, the conductive unit 310 is provided in the overlapping connection area DA, and the extension dimension of the overlapping connection area DA in the first direction X is greater than the extension dimension of the overlapping connection area DA in the second direction Y. Then, in step S05, a plurality of nozzles arranged side by side are moved along the first direction X to apply the light-emitting material to the substrate 100, and one or more adjacent nozzles are closed for a predetermined period of time to form the light-emitting unit 510 including the communication opening in the overlapping connection area DA.

[0117] In these alternative embodiments, when applying the luminescent material to the substrate 100 by inkjet printing, for example, when the luminescent material is sprayed toward the substrate 100 by a row of nozzles arranged along the second direction Y, the series of nozzles can be moved along the first direction X to apply the luminescent material to the entire substrate 100. By closing one or two adjacent nozzles in a row, the luminescent material is prevented from being sprayed directly into the stripe-shaped overlap connection region DA of the substrate 100, which can improve the situation where the conductive portion 310 is covered with the luminescent material and the connection with the first electrode 700 is affected.

[0118] In some other embodiments, in step S05, the light-emitting material may be printed onto the substrate 100 using pixel-level or non-pixel-level printing techniques.

[0119] Although the present application has been described above with reference to preferred embodiments, various modifications may be made without departing from the scope of the present application, and some of the components may be replaced with equivalents. In particular, as long as there is no structural contradiction, the technical features described in each embodiment may be arbitrarily combined. The present application is not limited to the specific embodiments disclosed below, but includes all aspects encompassed by the scope of the claims. [Explanation of symbols]

[0120] 10: Display panel 100: Substrate 200: 1st power signal line 300: conductive layer, 310: conductive portion, 311: recessed groove, 312: protrusion, 312a: first sub-segment, 312b: second sub-segment 400: pixel definition layer, 401: second surface, 410: pixel limiting portion, 411: first sub-portion, 412: second sub-portion, 420: first opening, 430: second opening 500: Light-emitting layer, 510: Light-emitting portion, 511: Hole injection layer, 512: Hole transport layer, 513: Light-emitting material layer, 514: Electron transport layer 600: Weir, 610: First surface, 620: Bottom, 630: Side 700: 1st electrode 800: Second electrode layer, 810: Second electrode 900: Flattening layer, 910: Communication hole DA: overlapping connection area, AA: display area, X: first direction, Y: second direction, Z: third direction

Claims

1. A substrate; A first power supply signal line provided on the substrate; a conductive layer provided on the first power supply signal line, the conductive layer including a plurality of conductive parts, the conductive parts and the first power supply signal line being connected to each other; a pixel defining layer including a pixel defining portion, and a first opening and a second opening formed in the pixel defining portion, wherein an orthogonal projection of the second opening on the substrate and an orthogonal projection of the conductive portion on the substrate at least partially overlap with each other; a light emitting layer provided on the side of the substrate where the conductive layer is located, the light emitting layer including a plurality of light emitting units, at least a portion of the light emitting units being located within a first opening; a dam portion provided on the substrate, surrounding the conductive portion, the dam portion being made of a material that is sparsely mixed with a material of the light emitting portion; a first electrode provided on a side of the light-emitting layer and the dam portion away from the substrate, and connected to the conductive layer via the second opening; A display panel characterized by:

2. the dam portion is located on a side of the pixel limiting portion away from the substrate and is provided to surround the second opening, the pixel limiting portion includes a first sub-portion and a second sub-portion spaced apart from each other, the first opening is provided in the first sub-portion, the second opening is provided in the second sub-portion, and the dam portion is located on a side of the second sub-portion away from the substrate; the dam portion has a first surface away from the substrate, the first sub-portion has a second surface away from the substrate, and the first surface is located on a side of the second surface away from the substrate; 2. The display panel according to claim 1 .

3. an orthogonal projection of the dam portion on the substrate is located within the second opening, and the dam portion directly contacts the substrate through the second opening; An inner wall surface of the pixel limiting portion facing the second opening and the dam portion are provided with a gap therebetween.

2. The display panel according to claim 1 .

4. The display panel includes overlapping connection regions, the overlapping connection regions being spaced apart from one another, and the conductive portion is disposed in the overlapping connection regions. The dam portion is located in the overlap connection region, The conductive portions are distributed at intervals along an extension direction of the overlapping connection region, an orthogonal projection of the conductive portion on the substrate is circular; The orthogonal projection of the dam portion on the substrate has a circular ring shape.

2. The display panel according to claim 1 .

5. The overlapping connection region has a stripe shape, and the overlapping connection regions are arranged in parallel along a first direction and / or a second direction, and the first direction and the second direction intersect with each other. The overlapping connection region has an extension dimension in the second direction larger than an extension dimension in the first direction, and the overlapping connection regions are arranged side by side along the first direction, The width of the overlapping connection region in the first direction is 10 μm to 50 μm, and the length of the overlapping connection region in the second direction is 10 μm or more, The distance between two adjacent overlap connection regions is 5 μm or more; Alternatively, the display panel further includes a display area, and the overlap connection areas are uniformly distributed within the display area; the overlap connection area is square; The distance between two adjacent overlap connection regions is 50 μm or less, or the distance between two adjacent overlap connection regions is 80 μm or more.

5. The display panel according to claim 4.

6. the dam portion has a bottom surface facing the substrate and a side surface connected to the bottom surface and extending away from the substrate, and an included angle between the side surface and the bottom surface is 10 degrees or more and 70 degrees or less; Or, the thickness d of the dam portion １ and the thickness d of the light emitting portion ２ But, d １ ≧15d ２ Fulfilling And / or the thickness d of the dam portion １ is 200 nm-10 μm, And / or the width of the dam portion is 2 μm-10 μm, Alternatively, the conductive portion is provided with a recessed groove toward a surface of the first electrode, The plurality of grooves are spaced apart, The groove is formed to extend in a first direction, and a plurality of the grooves are arranged side by side along a second direction.

2. The display panel according to claim 1 .

7. the display panel further includes a second electrode layer located on a side of the pixel definition layer facing the substrate, the second electrode layer including second electrodes provided corresponding to the first openings; the conductive portion and the second electrode are provided in the same layer, or the substrate is further provided with a planarization layer, the planarization layer is located on a side of the second electrode layer away from the pixel definition layer, the conductive layer is located on a side of the planarization layer away from the second electrode layer, a through hole is opened in the planarization layer, and the first electrodes are connected to each other via the through hole and the conductive portion; the conductive portion is contact-connected to the first power supply signal line, or the conductive layer is via-connected to the first power supply signal line; Alternatively, the dam portion has a surface remote from the substrate that is a hydrophobic and / or oleophobic low energy surface.

2. The display panel according to claim 1 .

8. A display panel comprising the display panel according to any one of claims 1 to 7. A display device comprising:

9. A method for manufacturing a display panel, comprising the steps of: providing a conductive material layer on a substrate and patterning the conductive material layer to form a first power signal line; providing a conductive material layer on the substrate having the first power supply signal lines, and patterning the conductive material layer to form a conductive layer, the conductive layer including a plurality of conductive portions located on a side of the first power supply signal lines away from the substrate; providing a pixel defining material layer on the substrate; and patterning the pixel defining material layer to form a first opening and a second opening, such that at least a portion of the conductive portion is exposed through the second opening; providing a hydrophobic material layer on the substrate, and patterning the hydrophobic material layer to form a dam portion surrounding the conductive portion; subsequently fabricating a light-emitting layer on the substrate, the light-emitting layer including a plurality of light-emitting portions, at least some of the light-emitting portions being located in the first openings; subsequently fabricating first electrodes on the substrate, the first electrodes being connected to each other through the second openings and the conductive portions; A method for manufacturing a display panel comprising the steps of:

10. the display panel includes an overlapping connection region, the light-emitting portion includes a communication opening located in the overlapping connection region, the conductive portion is provided in the overlapping connection region, and an extension dimension of the overlapping connection region in a first direction is larger than an extension dimension of the overlapping connection region in a second direction; and in the step of subsequently manufacturing a light-emitting layer on the substrate, a light-emitting portion including the communication opening is formed in the overlap connection region by moving a plurality of nozzles arranged side by side in the first direction to apply a light-emitting material to the substrate, and closing one or more of the adjacent nozzles for a predetermined period of time; 10. The method for manufacturing a display panel according to claim 9.

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