Display panel, manufacturing method thereof and display device

Abstract

Embodiments of the present application provide a display panel, a manufacturing method thereof and a display device. The display panel comprises a substrate, a light emitting device, a pixel definition layer and a first spacing structure. The light emitting device and the pixel definition layer are located on one side of the substrate. The pixel definition layer comprises an opening region and a bank. The opening region comprises a first opening and a second opening. The first opening is provided with the light emitting device. The first spacing structure is arranged in the second opening. In a direction perpendicular to the plane of the substrate, the distance between the surface of the first spacing structure away from the substrate and the substrate is d1. The bank comprises a first part. The distance between the surface of the first part away from the substrate and the substrate is d2. d1>d2. Embodiments of the present application can increase the transmission path of the lateral leakage current between two adjacent sub-pixels, hinder the transmission of the lateral leakage current, and improve the phenomenon of sub-pixel light stealing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device. BACKGROUND

[0002] An organic light emitting diode (OLED) has the characteristics of self-luminous, high brightness, low power consumption, fast response, and can realize the manufacturing of a flexible display screen. The organic self-luminous display technology has become the mainstream display technology. The organic light emitting display panel includes a common layer, and the common layer is formed by using an open mask layer during manufacturing, that is, the common layers of multiple sub-pixels are formed at the same time and are connected to each other. However, current may flow to adjacent sub-pixels through the two-dimensionally extended common layer, and such current is called a lateral leakage current. The lateral leakage current causes the sub-pixel to be brightened, which affects the display effect. SUMMARY

[0003] Embodiments of the present application provide a display panel, a manufacturing method thereof and a display device to improve the technical problem of sub-pixel brightening in the prior art.

[0004] In a first aspect, embodiments of the present application provide a display panel, comprising:

[0005] a substrate;

[0006] a light emitting device and a pixel definition layer located on one side of the substrate, the pixel definition layer comprising an opening region and a bank, the opening region comprising a first opening and a second opening, and the first opening being provided with the light emitting device;

[0007] a first spacing structure, the first spacing structure being arranged in the second opening;

[0008] wherein, in a direction perpendicular to a plane in which the substrate is located, a distance between a surface of the first spacing structure away from the substrate and the substrate is d1, the bank comprises a first part, a distance between a surface of the first part away from the substrate and the substrate is d2, and d1>d2.

[0009] In a second aspect, based on the same inventive concept, embodiments of the present application further provide a display device comprising the display panel provided in any of the embodiments of the present application.

[0010] In a third aspect, based on the same inventive concept, the present application also provides a manufacturing method of a display panel, the display panel comprising: a substrate; a light emitting device and a pixel definition layer located on one side of the substrate, the pixel definition layer comprising an opening region and a bank, the opening region comprising a first opening and a second opening, the first opening being provided with the light emitting device; a first spacing structure provided in the second opening; wherein, in a direction perpendicular to a plane in which the substrate is located, a surface of the first spacing structure away from the substrate is at a distance d1 from the substrate, and the bank comprises a first part, a surface of the first part away from the substrate is at a distance d2 from the substrate, and d1>d2.

[0011] The manufacturing method comprises:

[0012] The pixel definition layer with the first opening, the second opening and the bank is formed by exposure and development of a half-tone mask;

[0013] The first spacing structure is manufactured in the second opening.

[0014] The display panel, the manufacturing method thereof and the display device provided by the present application have the following beneficial effects: the pixel definition layer comprises the first opening, the second opening and the bank, the light emitting device is arranged in the first opening, and the first spacing structure is arranged in the second opening. Due to the thickness of the pixel definition layer, the depth of the second opening is limited, and accordingly the length of the sidewall of the second opening is limited, so the increased lateral leakage current transmission path of the sidewall of the second opening is limited. In the present application, d1>d2, the surface of the first spacing structure away from the substrate is higher than the surface of the first part of the bank away from the substrate, so that the length of the side surface of the first spacing structure is greater than the length of the sidewall of the second opening, the effect of the first spacing structure on increasing the lateral leakage current transmission path is not limited by the thickness of the pixel definition layer, and the side surface of the first spacing structure can greatly increase the lateral leakage current transmission path. In the present application, the side surface of the first spacing structure and the sidewall of the second opening can both increase the lateral leakage current transmission path in the common layer, thereby hindering the transmission of the lateral leakage current and improving the phenomenon of sub-pixel light stealing. In addition, the side surface of the first spacing structure and the sidewall of the second opening are both inclined surfaces, the thickness of the common layer deposited on the inclined surfaces is relatively thin, so that the impedance of the common layer is increased, and the effect of reducing the leakage current and improving the sub-pixel light stealing is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0017] Figure 2 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1. Figure 1 A cross-sectional view of the display panel along the line A-A' is provided in FIG. 2.

[0018] Figure 3 A partial enlarged view of the display panel along the line A-A' is provided in FIG. 3.

[0019] Figure 4 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0020] Figure 5 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1. Figure 4 A cross-sectional view of the display panel along the line B-B' is provided in FIG. 4.

[0021] Figure 6 A partial enlarged view of the display panel along the line B-B' is provided in FIG. 5. Figure 1 A cross-sectional view of the display panel along the line A-A' is provided in FIG. 2.

[0022] Figure 7 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0023] Figure 8 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1. Figure 7 A cross-sectional view of the display panel along the line C-C' is provided in FIG. 6.

[0024] Figure 9 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0025] Figure 10 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0026] Figure 11 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0027] Figure 12 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0028] Figure 13 A partial top view of a display panel according to an embodiment of the present application is provided in FIG. 1.

[0029] Figure 14 A flow chart of a method for manufacturing a display panel according to an embodiment of the present application is provided in FIG. 8.

[0030] Figure 15 A flow chart of a method for manufacturing a display panel according to an embodiment of the present application is provided in FIG. 8.

[0031] Figure 16A display device schematic diagram provided by the embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiment in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0033] The terms used in the embodiment of the present application are merely for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0034] In order to solve the problems existing in the prior art, the embodiment of the present application provides a display panel, a first opening and a second opening are made on a pixel definition layer, and a light emitting device is made in the first opening and a spacing structure is made in the second opening, the spacing structure is used to increase the path between sub-pixels to hinder the lateral leakage current between the sub-pixels and improve the phenomenon of sub-pixel stealing light.

[0035] Figure 1 A display panel partial top view provided by the embodiment of the present application, Figure 2 For Figure 1 A cross-sectional view at the tangent position A-A' in the embodiment of the present application, Figure 3 A local enlarged view of the position of the first spacing structure in the display panel. Figure 1 In the embodiment of the present application, two adjacent sub-pixels sp and the first spacing structure 41 between the two sub-pixels sp in the display panel are schematically shown. Figure 1 The shape of the sub-pixel sp is schematically shown in the embodiment of the present application, which is not a limitation to the present application. The display panel includes a plurality of sub-pixels sp, and the sub-pixel sp at least includes a red sub-pixel, a green sub-pixel and a blue sub-pixel. The first spacing structure 41 is arranged between the two sub-pixels sp to increase the transmission path of the lateral leakage current between the two sub-pixels sp.

[0036] As Figure 2As shown, the display panel comprises a substrate 10, light emitting devices 20 and a pixel definition layer 30 located on one side of the substrate 10. The pixel definition layer 30 comprises an opening region and a bank 33, the opening region comprises a first opening 31 and a second opening 32. The region between adjacent openings in the pixel definition layer 30 is the bank 33. The first opening 31 is provided with a light emitting device 20; the light emitting device 20 serves as a sub-pixel sp of the display panel. The light emitting device 20 comprises a first electrode 21, an evaporation layer 22 and a second electrode 23 stacked together. The first electrode 21 is a patterned structure isolated from each other. The evaporation layer 22 comprises an organic material, and the evaporation layer 22 is made by open mask evaporation. The evaporation layer 22 corresponding to each light emitting device 20 is connected to form a whole structure, and the evaporation layer 22 is a common layer 22G of each light emitting device 20. The second electrode 23 of each light emitting device 20 is connected, and the second electrode 23 is a common electrode of each light emitting device 20. In an embodiment, the first electrode 21 is an anode, and the second electrode 23 is a cathode.

[0037] The first spacing structure 41 is arranged in the second opening 32. In a direction perpendicular to the plane of the substrate 10, the distance between the surface of the first spacing structure 41 away from the substrate 10 and the substrate 10 is d1, and the distance between the surface of the first part 331 of the bank 33 away from the substrate 10 and the substrate 10 is d2, d1>d2. That is, with the substrate 10 as the reference surface, the surface of the first spacing structure 41 away from the substrate 10 is higher than the surface of the first part 331 away from the substrate 10.

[0038] As shown in the figure, Figure 2 The display panel further comprises a driving layer 50 and an encapsulation layer 60. The driving layer 50 is located between the substrate 10 and the light emitting device 20, and the driving layer 50 is provided with a pixel circuit for driving the light emitting device 20 to emit light. The encapsulation layer 60 is located on the side of the light emitting device 20 away from the substrate 10, and the encapsulation layer 60 is used for encapsulating and protecting the light emitting device 20 to improve the service life of the light emitting device 20. Optionally, the encapsulation layer 60 comprises at least one inorganic layer and at least one organic layer.

[0039] Taking the bank 33 adjacent to the first opening 31 as an example, the bank 33 comprises a flat region and a slope region. The outer surface of the slope region forms the inner wall of the first opening 31, that is, the slope region and the first opening 31 share a side wall. The flat region is the region where the first part 331 of the bank 33 is located.

[0040] Figure 3 Only the first spacing structure 41 and the position of the second opening 32 where it is located are shown in the figure. As shown in the figure, Figure 3As shown, the first spacer structure 41 includes a side surface 411 and a bottom surface 412 located on one side of the substrate 10. The included angle α formed between the side surface 411 and the bottom surface 412 is an acute angle, which can be considered as the slope angle of the side surface 411 of the first spacer structure 41. The first spacer structure 41 also includes a top surface 413, which is the surface of the first spacer structure 41 away from the substrate 10. In this embodiment of the invention, the first spacer structure 41 is located on the side of the common layer 22G closer to the substrate 10, that is, the common layer 22G is fabricated after the first spacer structure 41 is completed during fabrication. Figure 2 As seen in the cross-sectional view, the vapor-deposited common layer 22G is deposited along the top surface 413 and side surface 411 of the first spacer structure 41. The shape of the first spacer structure 41 in the cross-sectional view is a trapezoid. In this embodiment of the invention, the encapsulation layer 60 is formed on the side of the light-emitting device 20 away from the substrate 10. When fabricating the encapsulation layer 60, the inorganic layer in the encapsulation layer 60 is deposited to conform to the shape of the first spacer structure 41. By setting the cross-sectional shape of the first spacer structure 41 to a trapezoid, the inorganic layer in the encapsulation layer 60 can be deposited well at the corresponding positions of the top surface 413 and side surface 411 of the first spacer structure 41, without local thinning or breakage, thereby ensuring the reliability of the encapsulation.

[0041] like Figure 3 As shown, the sidewall 321 of the second opening 32 forms an acute angle γ parallel to the plane of the substrate 10. Assuming that the pixel definition layer 30 does not have the second opening 32 and the first spacing structure 41, the area between the two first openings 31 is basically the flat area of ​​the pixel definition layer 30. The common layer 22G fabricated on the pixel definition layer 30 will be directly deposited on the flat area. The lateral distance between the two first openings 31 is L, and the transmission path length of the lateral leakage current between two adjacent sub-pixels in the common layer 22G is L.

[0042] In this embodiment of the invention, the pixel definition layer 30 has a second opening 32, and a first spacing structure 41 is disposed within the second opening 32. Since there are undulations in the area between the two first openings 31, a common layer 22G is deposited on the undulating surface between the two first openings 31. The common layer 22G is deposited on the sidewall 321 of the second opening 32 and the side surface 411 of the first spacing structure 41. The common layer 22G deposited on the sidewall 321 of the second opening 32 and the side surface 411 of the first spacing structure 41 can increase the transmission path of lateral leakage current in the common layer 22G. Compared to the case where the second opening 32 and the first spacing structure 41 are not provided, this embodiment of the invention can increase the path length by 2*(L). 411 -L 411 *cosα)+2*(L 321 -L 321 *cosγ), where L411 The length of the side surface 411 of the first spacer structure 41 is 2*(L 411 -L 411 *cosα) represents the path length added after setting the first spacing structure 41; L 321 The length of the sidewall 321 of the second opening 32 is 2*(L 321 -L 321 *cosγ) represents the increased path length after the second opening 32 is set. In this embodiment of the invention, d1>d2, so the surface of the first spacer structure 41 away from the substrate 10 is higher than the surface of the first part 331 of the embankment 33 away from the substrate 10, which makes the length of the side 411 of the first spacer structure 41 greater than the length of the sidewall 321 of the second opening 32. The contribution of the first spacer structure 41 to increasing the path is relatively large.

[0043] In the display panel provided in this embodiment of the invention, the pixel definition layer 30 includes a first opening 31, a second opening 32, and a dam 33. A light-emitting device 20 is disposed in the first opening 31, and a first spacing structure 41 is disposed in the second opening 32. Due to the limited thickness of the pixel definition layer 30, the depth of the second opening 32 is limited, and the length of the sidewall 321 of the second opening 32 is correspondingly limited. Therefore, the lateral leakage current transmission path increased by utilizing the sidewall 321 of the second opening 32 is limited. In this embodiment of the invention, d1>d2 is set, so the surface of the first spacing structure 41 on the side away from the substrate 10 is higher than the surface of the first part 331 of the dam 33 on the side away from the substrate 10. This allows the length of the sidewall 411 of the first spacing structure 41 to be greater than the length of the sidewall 321 of the second opening 32. The effect of the first spacing structure 41 on increasing the lateral leakage current transmission path is not limited by the thickness of the pixel definition layer 30, and the sidewall 411 of the first spacing structure 41 can significantly increase the lateral leakage current transmission path. In this embodiment of the invention, the side surface 411 of the first spacing structure 41 and the side wall 321 of the second opening 32 can both increase the transmission path of lateral leakage current in the common layer 22G, thereby hindering the transmission of lateral leakage current and improving the phenomenon of sub-pixel overexposure. In addition, since the side surface 411 of the first spacing structure 41 and the side wall 321 of the second opening 32 are both sloped surfaces, the thickness of the common layer 22G deposited on the sloped surface will be relatively thin, which can also increase the impedance of the common layer 22G, thereby reducing leakage current and improving the phenomenon of sub-pixel overexposure.

[0044] Combination Figure 3 As illustrated in the embodiment, the path length increased after setting the first spacing structure 41 is 2*(L) 411 -L 411 *cosα). When the height h of the first spacer structure 41 is fixed, 2*(L) 411 -L 411cos a) = 2 * h * (1 / sin a - 1 / tan a) = 2 * h * (1 - cos a) / sin a. In summary, the larger a is, the larger 2 * h * (1 - cos a) / sin a is. In some embodiments, 60°≤ a < 90° is set, the transmission path of the leakage current is increased greatly after the first interval structure 41 is set, the transmission of the lateral leakage current can be greatly hindered, and the phenomenon of sub-pixel light stealing is improved.

[0045] In some embodiments, Figure 4 Another schematic diagram of a display panel is provided for the embodiments of the present application. Figure 5 For Figure 4 A schematic diagram of a cross section at the position of the tangent line B-B' is shown. Figure 4 A plurality of sub-pixels sp in the display panel are shown in the figure, and the first interval structure 41 is arranged between some adjacent sub-pixels sp. Figure 4 In the figure, the arrangement of the sub-pixels sp, the support column 70, and the setting position of the first interval structure 41 are only schematically shown, and are not used as a limitation on the present application.

[0046] In combination with Figure 4 and Figure 5 , the display panel further comprises a support column 70, which is located at the side of the first part 331 away from the substrate 10; in the direction e perpendicular to the plane in which the substrate 10 is located, the surface of the support column 70 away from the substrate 10 is at a distance d3 from the substrate 10, and d3 > d1. That is, taking the substrate 10 as a reference surface, the surface height of the support column 70 away from the substrate 10 is higher than the surface height of the first interval structure 41 away from the substrate 10, so that the support column 70 can be used to support the mask in the process of evaporating the common layer, preventing the mask in the evaporation process from contacting the first interval structure 41. In the embodiments of the present application, the first interval structure 41 is mainly used to increase the transmission path of the lateral leakage current between two adjacent sub-pixels, and the first interval structure 41 can be arranged between sub-pixels sp of a specific color or between any two adjacent sub-pixels sp in the panel, so that the total area of the first interval structure 41 set is large from the perspective of the entire surface of the display panel. If the mask contacts the large-area first interval structure 41 in the evaporation process, scratches will be generated between the mask and the first interval structure 41, and the residues of the scratches on the mask can fall on the panel in the next evaporation, thereby causing evaporation defects. The surface of the support column 70 away from the substrate 10 is set to be high in height, so that the support column 70 can support the mask, preventing evaporation defects and improving the evaporation yield.

[0047] In some embodiments, the support pillar 70 and the first spacer structure 41 are made of the same material. The materials used to fabricate the support pillar 70 and the first spacer structure 41 include organic materials. Optionally, the support pillar 70 and the first spacer structure 41 are fabricated using positive photoresist via an exposure-development process. Fabricating the first spacer structure 41 and the support pillar 70 in the same process simplifies the fabrication process and reduces its complexity.

[0048] In some implementations, such as Figure 5 As shown, the support column 70 has a first sidewall 71 and a first bottom surface 72, the first bottom surface 72 being the surface of the support column 70 closest to the substrate 10; the included angle between the first sidewall 71 and the first bottom surface 72 is β, which can be considered as the slope angle of the first sidewall 71 of the support column 70. Wherein, β < α. Figure 5 The α indicated in the middle can be referenced. Figure 3 The following is an explanation of the embodiments. Since the support pillar 70 and the first spacing structure 41 serve different functions, their sizes and shapes differ. Setting β < α allows the support pillar 70 and the first spacing structure 41 to be manufactured in the same exposure-development process, ensuring that the width of the first bottom surface 72 of the support pillar 70 is greater than the width of the bottom surface 412 of the first spacing structure 41. This allows the support pillar 70 to have a relatively large area to effectively support the mask, while the first spacing structure 41 can have a relatively small width to minimize the space occupied between adjacent sub-pixels and avoid affecting the sub-pixel density of the display panel.

[0049] In some implementations, such as Figure 5 As shown, the embankment 33 has a second sidewall 332, which is shared by the embankment 33 and the first opening 31. The second sidewall 332 of the embankment 33 is the inner wall of the first opening 31. The angle between the second sidewall 332 and the plane parallel to the substrate 10 pointing towards the embankment 33 is θ, which can be considered as the slope angle of the second sidewall 332. Wherein, θ < β. In this embodiment of the invention, the embankment 33 is fabricated first, and then the support column 70 and the first spacing structure 41 are fabricated. On the one hand, the support column 70 is fabricated on the embankment 33. The width of the support column 70 is smaller than the width of the embankment 33 between the two first openings 31. Due to the influence of the exposure-development process, the wider embankment 33 will have a larger slope angle, such that θ < β. On the other hand, the second sidewall 332 is the inner wall of the first opening 31. The light-emitting device is installed in the first opening 31. The second sidewall 332 has a small slope angle. With the thickness of the embankment 33 fixed, the length of the second sidewall 332 can be longer. This can ensure that the light-emitting device emits light at large angles and prevent color shift at large angles.

[0050] In some embodiments, the pixel defining layer 30 and the first spacer structure 41 are made of the same material, and both are fabricated using positive photoresist via an exposure-development process. The first spacer structure 41 is fabricated within the second opening 32 formed in the pixel defining layer 30, which improves the adhesion between the first spacer structure 41 and the underlying structure, and using the same material reduces material costs. When the pixel defining layer 30 and the first spacer structure 41 are made of the same material, although their fabrication processes differ, there is no clear boundary at their contact points after final molding. Furthermore, since the first spacer structure 41 is fabricated inside the second opening 32 of the pixel defining layer 30, and d1>d2, there will be certain recesses on the left and right sides of the first spacer structure 41 (considered to be inside the second opening 32), thus distinguishing the first spacer structure 41 from the pixel defining layer 30.

[0051] In some implementations, such as Figure 3 As shown, in the direction x from the first opening 31 to the first spacing structure 41, the width of the bottom surface 412 of the first spacing structure 41 is D, where 2μm≤D≤10μm. When the first spacing structure 41 is fabricated using an exposure-development process, the width D of the bottom surface 412 and the slope angle α of the side surface 411 have a certain relationship due to the influence of the process. Specifically, the smaller the width D, the larger the slope angle α, and the greater the increase in leakage current transmission path after the first spacing structure 41 is set. In this embodiment of the invention, the width D of the bottom surface 412 is relatively small, ensuring that the slope angle α satisfies 60°≤α<90°, so that the leakage current transmission path is greatly increased after the first spacing structure 41 is set. Furthermore, the width D of the bottom surface 412 is not too small, so that the contact area between the first spacing structure 41 and the structure below it is large enough and the adhesion is good enough, making it difficult for the first spacing structure 41 to peel off in subsequent processes; in addition, the width D of the bottom surface 412 is not too large, which can prevent the setting of the first spacing structure 41 from affecting the spacing distance between two adjacent sub-pixels. The present invention limits the width D to ensure that the first spacing structure 41 can increase the leakage current transmission path and improve the lateral leakage current to a large extent. It can also ensure the structural stability of the first spacing structure 41 and prevent peeling. At the same time, it can avoid affecting the spacing distance between two sub-pixels and thus affecting the sub-pixel setting density.

[0052] In some implementations, such as Figure 3 As shown, along the direction e perpendicular to the plane containing the substrate 10, the depth of the second opening 32 is h1, and the thickness of the first part 331 is H, where 2*H / 3 ≤ h1 ≤ H. Combining the above... Figure 3The explanation of the principle of increasing the leakage current transmission path in the embodiment shows that the sidewall 321 of the second opening 32 is beneficial to increasing the leakage current transmission path. With a fixed H size, the larger the depth h1, the greater the increase in the leakage current transmission path. In this embodiment of the invention, 2*H / 3≤h1≤H is set, which can utilize the sidewall 321 of the second opening 32 to a large extent to increase the leakage current transmission path, thereby hindering the transmission of leakage current and improving the sub-pixel brightness stealth.

[0053] In some implementations, h1 = H, that is, the second opening 32 penetrates the pixel definition layer 30 in the thickness direction of the pixel definition layer 30. This setting makes the sidewall 321 of the second opening 32 have a greater effect on increasing the leakage current transmission path, and has a better effect on improving the effect of sub-pixel stealth.

[0054] Optionally, the first part 331 of the embankment 33 is the region with the largest thickness in the pixel definition layer 33, wherein the thickness H of the first part 331 satisfies: 0.8μm≤H≤2μm.

[0055] In some implementations, such as Figure 2 As shown, the first electrode 21 of the light-emitting device 20 is located on the side of the pixel definition layer 30 closest to the substrate 10. In the direction e perpendicular to the plane of the substrate 10, the first opening 31 overlaps with the first electrode 21, while the second opening 32 does not overlap with the first electrode 21. In this embodiment, regardless of the depth of the second opening 32, the bottom of the second opening 32 will not expose the first electrode 21, ensuring the flatness of the bottom of the second opening 32 and preventing the first spacer structure 41 from being fabricated on an uneven substrate. Fabricating the first spacer structure 41 on an uneven substrate would cause the first spacer structure 41 to tilt, and the tilted first spacer structure 41 may cause cracks in the encapsulation layer during subsequent encapsulation processes, affecting reliability. This embodiment of the invention can avoid the tilting of the first spacer structure 41 and ensure encapsulation reliability.

[0056] In some implementations... Figure 6 for Figure 1 Another cross-sectional diagram at the position of the midtangent A-A', as shown below. Figure 6As shown, the surface of the first spacing structure 41 on the side away from the substrate 10 is a concave-convex surface. This arrangement can further increase the transmission path of the leakage current, thereby further hindering the transmission of the leakage current and improving the sub-pixel light stealing. In an embodiment, the base under the first spacing structure 41 is made to have a concave-convex surface. After the first spacing structure 41 is made on the concave-convex surface, the surface of the first spacing structure 41 on the side away from the substrate 10 is a concave-convex surface. This can increase the contact area of the first spacing structure 41 and the base under it, thereby improving the bonding reliability therebetween. In another embodiment, the first spacing structure 41 is made using a half-tone mask. The surface of the first spacing structure 41 on the side away from the substrate 10 is a concave-convex surface. The specific making method of the first spacing structure 41 will be illustrated in the making method embodiment below.

[0057] In some embodiments, Figure 7 Another display panel schematic diagram provided for the embodiments of the present application is shown in FIG. 3. Figure 8 As shown in FIG. 3, Figure 7 A cross-sectional schematic diagram at the tangent line C-C' position is shown in FIG. 4. Figure 7 The first opening 31 and the second opening 32 of the pixel definition layer 30 are shown. The position of the first opening 31 is the position of the sub-pixel sp. Figure 7 The first spacing structure 41 and the second spacing structure 42 in the second opening 32 are also shown. The sub-pixel sp corresponds to the position of the first opening 31 of the pixel definition layer 30, Figure 8 In the cross-sectional schematic diagram shown in FIG. 4, the sub-pixel sp is not marked. In combination with Figure 7 and Figure 8 It can be understood that the second spacing structure 42 is the same as the first spacing structure 41 and both belong to the convex structure in the second opening 32. The second spacing structure 42 is not the inner wall of the second opening 32. The second opening 32 has a bottom surface and the second spacing structure 42 protrudes upward from the plane where the bottom surface of the second opening 32 is located.

[0058] In some embodiments, the first spacing structure 41, the second spacing structure 42 and the pixel definition layer 30 are made of the same material. Since d1>d2, the first spacing structure 41 in the second opening 32 can be easily identified. When the second spacing structure 42 and the pixel definition layer 30 are made of the same material, there is no obvious boundary between the second spacing structure 42 and the bottom surface of the second opening 32. Or when the second spacing structure 42 and the second opening 32 are made in the same process, the second spacing structure 42 and the second opening 32 are integrally formed, so there is also no obvious boundary between the second spacing structure 42 and the bottom surface of the second opening 32. The second spacing structure 42 in the second opening 32 can be divided in the following way: for example,Figure 7 The second opening 32 in the long strip shape between two sub-pixels sp is shown in Figure 7 The length of the second spacing structure 42 in the longitudinal direction is short in the case shown in Figure 7 When the second spacing structure 42 is in contact with the inner wall of the second opening 32 in the longitudinal direction, no matter the height of the surface of the second spacing structure 42 away from the substrate 10, the second spacing structure 42 can be considered to divide the second opening 32 into a smaller opening in the extension direction of the second spacing structure 42, such as Figure 7 When one second spacing structure 42 is arranged in the second opening 32, the second spacing structure 42 extending in the longitudinal direction can divide the second opening 32 into two small openings.

[0059] As shown in Figure 8 The two opposite sides of the first spacing structure 41 and the second spacing structure 42 intersect at the position circled by the area Q. Such arrangement forms a slit between the two opposite sides of the first spacing structure 41 and the second spacing structure 42, which has a small volume and tends to be in the shape of a V. When the common layer is deposited, a stress concentration point is formed at the position of the slit, so that the common layer naturally breaks at the position of the slit to form a broken area of the common layer. The leakage current cannot flow laterally in the broken area of the common layer, thereby blocking the lateral leakage between adjacent sub-pixels and improving the sub-pixel light stealing.

[0060] As shown in Figure 8 The surface of the first spacing structure 41 away from the substrate 10 is higher than the surface of the second spacing structure 42 away from the substrate 10.

[0061] In some embodiments, the first spacing structure 41 and the second spacing structure 42 are made in the same process, and the first spacing structure 41 and the second spacing structure 42 are formed at the same time after exposure and development of a half-tone mask.

[0062] In other embodiments, the second spacing structure 42 is made in the same process as the bank 33, that is, the second spacing structure 42 is made in the process of making the pixel definition layer 30, and the distance between the surface of the second spacing structure 42 away from the substrate 10 and the substrate 10 is equal to d2.

[0063] In some embodiments of the present application, the first spacing structure 41 is located between two adjacent first openings 31, for increasing the transmission path of the lateral leakage current between two sub-pixels, and the number of the first spacing structure 41 between the two adjacent first openings 31 can be set according to specific requirements. Figure 7 In the specific embodiment, two first spacing structures 41 are arranged between two adjacent first openings 31. One or more first spacing structures 41 can also be arranged between two adjacent first openings 31 according to requirements.

[0064] The number of the second spacing structure 42 arranged in the second opening 32 is not limited in the embodiments of the present application, Figure 7 In the specific embodiment, one second spacing structure 42 is arranged in the second opening 32. In some embodiments, Figure 7 In the specific embodiment, two or more second spacing structures 42 are arranged in the second opening 32 and are discontinuous in the longitudinal direction.

[0065] In some embodiments, Figure 9 Another partial schematic view of a display panel provided by the embodiments of the present application is shown in FIG. 6. Figure 9 Two sub-pixels sp are shown in FIG. 6, and one sub-pixel sp corresponds to one first opening 31. As shown in FIG. 6, Figure 9 The second opening 32 includes a first sub-opening 32-1, which is located between two adjacent first openings 31. The two adjacent first openings 31 have a first center line Z1, and the minimum distance of the first center line Z1 to the two first openings 31 is equal. The first center line Z1 is a virtual line between the two first openings 31. The minimum distance of the first center line Z1 to the first opening 31 can be understood in combination with the above Figure 5 embodiments, wherein the first opening 31 has an inner wall, the second side wall 332 of the bank 33 is the inner wall of the first opening 31, and the minimum distance of the first center line Z1 to the inner wall of the first opening 31 is the minimum distance of the first opening 31 to the first opening 31. In the embodiments of the present application, the first center line Z1 is the middle position between the two first openings 31, the first sub-opening 32-1 overlaps the first center line Z1, which means that the first sub-opening 32-1 is located at the middle position between the two first openings 31, and the first spacing structure 41 is made in the first sub-opening 32-1 to increase the transmission path of the leakage current between the two first openings 31. In this way, when a first spacing structure 41 or multiple first spacing structures 41 of appropriate size are made in the first sub-opening 32-1, a safe distance between the first sub-opening 32-1 and the two first openings 31 can be ensured, so that the bank 33 between the first sub-opening 32-1 and the first opening 31 has a flat area of a certain length (see the corresponding description of the bank 33 in the embodiments), which can ensure the integrity of the inner wall of the first opening 31, thereby ensuring the yield of the light emitting device 20 made in the first opening 31. Figure 2 In the specific embodiment, the first sub-opening 32-1 is located between the two first openings 31, and the first spacing structure 41 is made in the first sub-opening 32-1 to increase the transmission path of the leakage current between the two first openings 31.

[0066] In some implementations... Figure 10 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 10 The diagram illustrates two sub-pixels, namely the first sub-pixel sp1 and the second sub-pixel sp2, with each sub-pixel corresponding to a first opening 31. (Example:) Figure 10 As shown, the second opening 32 includes a second sub-opening 32-2, a portion of which is located between two adjacent first openings 31; a first centerline Z1 exists between the two adjacent first openings 31, and the minimum distance from the first centerline Z1 to the two first openings 31 is equal. The first centerline Z1 can be referred to the above... Figure 9 The relevant descriptions in the embodiments are for reference. Since the second sub-opening 32-2 is located on one side of the first centerline Z1, the first spacing structure 41 disposed within the second sub-opening 32-2 is also located on one side of the first centerline Z1. Figure 10 The diagram shows that the second sub-opening 32-2 between the two first openings 31 is closer to the first opening 31 on the left. The second sub-opening 32-2 and the first spacing structure 41 are used to increase the leakage current transmission path and block the leakage current from being transmitted to the first sub-pixel sp1 on the left, thereby preventing the first sub-pixel sp1 from being lit up by the leakage current.

[0067] In some implementations, such as Figure 10 As shown, the second sub-opening 32-2 is arranged around the first opening 31, and the first spacing structure 41 inside the second sub-opening 32-2 is arranged around the first opening 31. It can block the transmission of leakage current around the first sub-pixel sp1 and effectively prevent the first sub-pixel sp1 from being lit up.

[0068] In this embodiment of the invention, the light-emitting device 20 includes at least a red light-emitting device, a green light-emitting device, and a blue light-emitting device. The materials of the light-emitting layers in the different colored light-emitting devices are different, and the turn-on voltages of the light-emitting devices are different, resulting in different degrees of influence from leakage current. For example, the turn-on voltage of the blue light-emitting device is lower, so it is more affected by lateral leakage current, and the blue light-emitting device is prone to exhibiting a "sneaking" effect. In the display panel, the first spacing structure 41 around the light-emitting device can be differentiated according to the differences in the degree of influence from leakage current.

[0069] In some implementations... Figure 11 This is a partial schematic diagram of another display panel provided in an embodiment of the present invention. Figure 11 The diagram illustrates a first light-emitting device 20-1 and a second light-emitting device 20-2 of different colors. The first light-emitting device 20-1 and the second light-emitting device 20-2 may be adjacent or not adjacent. Both the first light-emitting device 20-1 and the second light-emitting device 20-2 are sub-pixels (sp) in the display panel, and each light-emitting device corresponds to a first opening (…).Figure 11 The first spacing structure 41 comprises a first sub-spacing structure 41-1 and a second sub-spacing structure 41-2, the first sub-spacing structure 41-1 is arranged around the first light emitting device 20-1, and the second sub-spacing structure 41-2 is arranged around the second light emitting device 20-2; wherein the number of the first sub-spacing structure 41-1 and the second sub-spacing structure 41-2 is different. Optionally, as shown in Figure 11 The number of the first sub-spacing structure 41-1 is greater than the number of the second sub-spacing structure 41-2, the more the number of the first spacing structure 41 arranged around the light emitting device, the greater the increase of the leakage current transmission path, and the greater the effect of hindering the leakage current transmission. When the first light emitting device 20-1 is more susceptible to the leakage current compared with the second light emitting device 20-2, the number of the first sub-spacing structure 41-1 arranged around the first light emitting device 20-1 can be more, so as to hinder the transmission of the leakage current around the first light emitting device 20-1 to the first light emitting device 20-1 to a greater extent, thereby effectively improving the first light emitting device 20-1 stealing light. The embodiment of the present application can make different settings for the first spacing structure 41 around the light emitting device according to the difference in the degree of influence of the leakage current, more number of the first spacing structure 41 is arranged around the light emitting device which is susceptible to the leakage current, and less number of the first spacing structure 41 or no first spacing structure 41 is arranged around the light emitting device which is less susceptible to the leakage current. Reasonable setting of the number of the first spacing structure 41 can improve the phenomenon of sub-pixel stealing light, and at the same time, it can also avoid the redundant setting of the first spacing structure 41 affecting the size of the spacing between the sub-pixels.

[0070] Optionally, Figure 11 The first light emitting device 20-1 is a blue light emitting device, and the second light emitting device 20-2 is a red light emitting device or a green light emitting device.

[0071] In combination with Figure 3As shown in the schematic cross-sectional view, the first spacer structure 41 has a height in a direction e perpendicular to the plane in which the substrate 10 lies. The height of the first spacer structure 41 is the vertical distance between the top surface 413 and the bottom surface 412. The height of the first spacer structure 41 affects the increase in the leakage current transmission path. In some embodiments, the first light emitting device 20-1 and the second light emitting device 20-2 are different in color, the first sub-spacer structure 41-1 is arranged around the first light emitting device 20-1, and the second sub-spacer structure 41-2 is arranged around the second light emitting device 20-2, wherein the first sub-spacer structure 41-1 and the second sub-spacer structure 41-2 are different in height. When the slope angle a of the first sub-spacer structure 41-1 and the second sub-spacer structure 41-2 is the same, the greater the height, the greater the increase in the leakage current transmission path, and the more conducive to hindering the transmission of the leakage current. The height of the first sub-spacer structure 41-1 and the second sub-spacer structure 41-2 around the light emitting device can be different according to the difference in the degree of influence of the leakage current, and the height of the first spacer structure around the light emitting device of different colors can be reasonably set to improve the sub-pixel light stealing phenomenon.

[0072] In combination Figure 3 As shown in the schematic cross-sectional view, the first spacer structure 41 has a height in a direction e perpendicular to the plane in which the substrate 10 lies. The height of the first spacer structure 41 is the vertical distance between the top surface 413 and the bottom surface 412. The height of the first spacer structure 41 affects the increase in the leakage current transmission path. In some embodiments, the first light emitting device 20-1 and the second light emitting device 20-2 are different in color, the first sub-spacer structure 41-1 is arranged around the first light emitting device 20-1, and the second sub-spacer structure 41-2 is arranged around the second light emitting device 20-2, wherein the first sub-spacer structure 41-1 and the second sub-spacer structure 41-2 are different in height. When the slope angle a of the first sub-spacer structure 41-1 and the second sub-spacer structure 41-2 is the same, the greater the height, the greater the increase in the leakage current transmission path, and the more conducive to hindering the transmission of the leakage current. The height of the first sub-spacer structure 41-1 and the second sub-spacer structure 41-2 around the light emitting device can be different according to the difference in the degree of influence of the leakage current, and the height of the first spacer structure around the light emitting device of different colors can be reasonably set to improve the sub-pixel light stealing phenomenon.

[0073] In some embodiments of the present application, the first sub-spacing structure 41-1 is arranged around the first light emitting device 20-1, and the second sub-spacing structure 41-2 is arranged around the second light emitting device 20-2, wherein at least one of the height, width and number of the first sub-spacing structure 41-1 and the second sub-spacing structure 41-2 is different. The first spacing structure 41 around the light emitting device can be differentially arranged according to the difference in the degree of influence of the leakage current, and the height, width and number of the first spacing structure 41 can be flexibly set to hinder the transmission of the lateral leakage current, thereby improving the sub-pixel stealing.

[0074] As can be seen from the above examples, the first spacing structure 41 in the embodiments of the present application has at least the characteristics of height, number and width. In some embodiments, the degree of lateral leakage current between light emitting devices of different colors is different, for example, the degree of leakage from a red light emitting device to a blue light emitting device is greater than the degree of leakage from a green light emitting device to a blue light emitting device, that is, the blue light emitting device is easily affected by the red light emitting device adjacent thereto to cause stealing. At this time, the first spacing structure 41 between the light emitting devices can be differentially arranged according to the difference in the degree of leakage.

[0075] Figure 11 In another embodiment, the first spacing structure 41 forms a closed ring around the light emitting device. Figure 12 Another partial schematic view of a display panel according to an embodiment of the present application is provided, Figure 12 In the figure, the position of a sub-pixel sp is shown, which includes a light emitting device 20 arranged in a first opening. As shown, Figure 12 The second opening 32 is arranged around the light emitting device 20, and the first spacing structure 41 is arranged around the light emitting device 20, that is, two first spacing structures 41 are arranged around the light emitting device 20, and the two first spacing structures 41 form a non-closed figure in the top view. When the first spacing structure 41 is arranged around the light emitting device 20, the number of the first spacing structure 41 around the light emitting device 20 can be set according to specific requirements.

[0076] In some embodiments, Figure 13 Another schematic view of a display panel according to an embodiment of the present application is provided, Figure 13 In the figure, the size and arrangement of the light emitting device and the shape of the first spacing structure 41 are only schematically shown, and are not intended to limit the present application. As shown, Figure 13As shown, the light emitting device includes a first light emitting device 20-1, a second light emitting device 20-2 and a third light emitting device 20-3 which are different in color, the first spacing structure 41 includes a third sub-spacing structure 41-3 and a fourth sub-spacing structure 41-4; the third sub-spacing structure 41-3 is located between the first light emitting device 20-1 and the second light emitting device 20-2, and the fourth sub-spacing structure 41-4 is located between the first light emitting device 20-1 and the third light emitting device 20-3; wherein at least one of the height, width and number of the third sub-spacing structure 41-3 and the fourth sub-spacing structure 41-4 is different. Figure 13 Only the number of the third sub-spacing structure 41-3 and the fourth sub-spacing structure 41-4 is different. The first light emitting device 20-1 is adjacent to the second light emitting device 20-2 and the third light emitting device 20-3 respectively, and the second light emitting device 20-2 and the third light emitting device 20-3 have different degrees of leakage to the first light emitting device 20-1. The characteristics of the first spacing structure between the adjacent light emitting devices can be set differently according to the difference in the degree of leakage, so as to flexibly and reasonably set the height, number and width of the first spacing structure to hinder the lateral leakage between the light emitting devices and improve the sub-pixel light stealing.

[0077] Figure 13 The number of the fourth sub-spacing structure 41-4 is greater than the number of the third sub-spacing structure 41-3. In an embodiment, the first light emitting device 20-1 is a blue light emitting device, the second light emitting device 20-2 is a green light emitting device, and the third light emitting device 20-3 is a red light emitting device.

[0078] Based on the same inventive concept, the present application also provides a manufacturing method of a display panel, which is used to manufacture the display panel provided by the present application. The display panel and the manufacturing method of the display panel can be understood by mutual reference. Figure 14 The manufacturing method of the display panel provided by the present application is shown in the flow chart as follows: Figure 14 As shown, the manufacturing method includes:

[0079] A driving layer 50 is manufactured on the substrate 10, and a patterned first electrode 21 is manufactured on the driving layer 50, the first electrode 21 belongs to a light emitting device. The following steps are manufactured after the process of the first electrode 21: wherein,

[0080] Step S101: coating a first photoresist layer 030, the first photoresist layer 030 is used to manufacture a pixel definition layer 30; wherein the material of the first photoresist layer 030 is a positive photoresist.

[0081] Step S102: Expose the first photoresist layer 030 using the half-tone mask 001; the half-tone mask 001 has a first light-transmitting area Q1 and a second light-transmitting area Q2, the first light-transmitting area Q1 corresponds to the preset position 031 of the first opening 31, and the second light-transmitting area Q2 corresponds to the preset position 032 of the second opening 32.

[0082] Step S103: Then, after development, the pixel definition layer 30 having the first opening 31, the second opening 32, and the bank 33 is formed. The first opening 31 overlaps the first electrode 21. Optionally, the light transmittance of the first light-transmitting area Q1 is greater than that of the second light-transmitting area Q2, so that the depth of the second opening 32 formed after exposure and development is less than that of the first opening 31.

[0083] Step S104: The first spacing structure 41 is made in the second opening 32, and the surface of the first spacing structure 41 away from the substrate 10 has a distance d1 from the substrate 10 in the direction e perpendicular to the plane of the substrate 10, and the bank 33 includes a first part 331, and the surface of the first part 331 away from the substrate 10 has a distance d2 from the substrate 10, d1>d2.

[0084] Step S105: Evaporate the common layer 22G, which is made using an open mask, covering the entire area of the display panel. The common layer 22G will not only be deposited in the first opening 31, but also along the side surface of the first spacing structure 41 and the top surface away from the substrate 10.

[0085] After the common layer 22G is evaporated, the second electrode 23 of the light-emitting device 20 is made, and the first electrode 21, the common layer 22G, and the second electrode 23 stacked at the position of the first opening 31 form the light-emitting device 20. Optionally, after the second electrode 23 is made, the encapsulation layer of the display panel is made.

[0086] The manufacturing method provided by the embodiment of the present application adopts the half-tone mask 001 to form the pixel definition layer 30 with the first opening 31, the second opening 32 and the bank 33 after the exposure and development process, manufactures the light emitting device in the first opening 31, and manufactures the first spacing structure 41 in the second opening 32. The surface of the first spacing structure 41 far from the substrate 10 is higher than the surface of the first part 331 of the bank 33 far from the substrate 10, so that the length of the side surface 411 of the first spacing structure 41 is greater than the length of the sidewall 321 of the second opening 32. The first spacing structure 41 and the pixel definition layer 30 are manufactured in different processes, the effect of the first spacing structure 41 on increasing the transmission path of the lateral leakage current is not limited by the thickness of the pixel definition layer 30, and the side surface 411 of the first spacing structure 41 can greatly increase the transmission path of the lateral leakage current. In the embodiment of the present application, the side surface of the first spacing structure 41 and the sidewall of the second opening 32 can both increase the transmission path of the lateral leakage current in the common layer 22G, thereby hindering the transmission of the lateral leakage current and improving the phenomenon of sub-pixel light stealing. In addition, the side surface 411 of the first spacing structure 41 and the sidewall 321 of the second opening 32 are both inclined surfaces, and the thickness of the common layer 22G evaporated on the inclined surfaces is relatively thin, so that the impedance of the common layer 22G can also be increased, and the effect of reducing the leakage current and improving the sub-pixel light stealing can also be achieved.

[0087] In some embodiments, the display panel further includes a support column, and the first spacing structure 41 can be manufactured in the same process as the support column. Figure 15 Another manufacturing method flow chart of a display panel provided by the embodiment of the present application is shown in Figure 15 The manufacturing method includes the following steps.

[0088] Step S201: After the process of the first electrode 21, a half-tone mask is used to form a pixel definition layer 30 with a first opening 31, a second opening 32 and a bank 33 after exposure and development.

[0089] Step S202: A second photoresist layer is coated, and a first spacing structure 41 and a support column 70 are simultaneously formed by an exposure and development process. In the direction e perpendicular to the plane of the substrate 10, the surface of the support column 70 far from the substrate 10 is d3 away from the substrate 10, and d3>d1. The first spacing structure 41 is located in the second opening 32, and the support column 70 is located on the side of the first part 331 of the bank 33 far from the substrate 10. The second photoresist layer is used to manufacture the first spacing structure 41 and the support column; the material of the second photoresist layer is a positive photoresist. The materials of the second photoresist layer and the first photoresist layer 030 can be the same or different. Optionally, the first spacing structure 41 has a height h, and the support column 70 has a height h 70 , wherein h is less than h 70This is because, although the first spacing structure 41 and the support column 70 are fabricated in the same process, due to the limitation of the flowability of the second photoresist layer material, the coated second photoresist layer cannot be planarized completely, the thickness of the coated second photoresist layer at the position of the second opening 32 is smaller, and the thickness of the coated second photoresist layer on the first part 331 of the bank 33 is larger, so that after exposure and development, the first spacing structure 41 has a height slightly smaller than that of the support column 70.

[0090] After the first spacing structure 41 and the support column 70 are formed, the common layer G and other structures are fabricated.

[0091] By using the fabrication method provided by the embodiment of the present application, the first spacing structure 41 and the support column 70 are fabricated in the same process, so that the process can be simplified and the process is simple. Moreover, the surface of the side of the support column 70 away from the substrate 10 has a height higher than that of the side of the first spacing structure 41 away from the substrate 10, so that the support column 70 can be used to support the mask in the process of evaporating the common layer, to prevent the mask from contacting the first spacing structure 41 in the evaporation process, to prevent evaporation failure and to improve the evaporation yield.

[0092] In some embodiments, as shown in FIG. 1, the surface of the side of the first spacing structure 41 away from the substrate 10 is a concave-convex surface. Figure 6 The display panel provided by the embodiment can be fabricated by using the following fabrication method:

[0093] In one fabrication method, a half-tone mask is used to form the first spacing structure 41 after exposure and development, so that the surface of the side of the first spacing structure 41 away from the substrate 10 is a concave-convex surface. The half-tone mask used to fabricate the first spacing structure 41 has regions with different light transmittances. The surface of the finally formed first spacing structure 41 is a concave-convex surface by using different exposure degrees.

[0094] In another fabrication method, when the pixel definition layer 30 is fabricated, a half-tone mask is used to form the second opening 32 after exposure and development, so that the bottom of the second opening 32 has a concave-convex surface; then when the first spacing structure 41 is fabricated in the second opening 32, the first spacing structure 41 is formed above the concave-convex surface, so that the surface of the side of the first spacing structure 41 away from the substrate 10 is a concave-convex surface. By using this fabrication method, not only can the concave-convex surface of the first spacing structure 41 increase the transmission path of the leakage current, so as to further hinder the transmission of the leakage current and improve the sub-pixel light stealing, but also can increase the contact area between the first spacing structure 41 and the underlying substrate, so as to improve the bonding reliability therebetween and prevent the first spacing structure 41 from peeling off from the substrate.

[0095] Based on the same inventive concept, the embodiment of the present application also provides a display device, Figure 16A display device provided by an embodiment of the present application is shown in a schematic diagram as Figure 16 As shown, the display device includes the display panel 100 provided by any embodiment of the present application. The structure of the display panel 100 has been described in the above embodiments, and will not be repeated here. The display device provided by the embodiment of the present application can be a mobile phone, a tablet, a computer, a television, or the like.

[0096] The above merely provides a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, and the like within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0097] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a light-emitting device and a pixel definition layer on one side of the substrate, the pixel definition layer comprising an opening region and a bank, the opening region comprising a first opening and a second opening, the first opening being provided with a light-emitting device; a first spacing structure provided in the second opening; the first spacing structure is provided between at least two adjacent light-emitting devices; wherein, in a direction perpendicular to the plane in which the substrate lies, the distance from the surface on the side of the first spacing structure away from the substrate to the substrate is d1, the bank comprises a first part, the distance from the surface on the side of the first part away from the substrate to the substrate is d2, and d1>d2.

2. The display panel of claim 1, wherein the first spacing structure comprises a side surface and a bottom surface on the side of the substrate, and the included angle α between the side surface and the bottom surface is an acute angle.

3. The display panel of claim 2, wherein 60°≤α<90°。 4. The display panel of claim 2, wherein the display panel further comprises a support column, the support column being located on the side of the first part away from the substrate; the support column has a first side wall and a first bottom surface, the first bottom surface being the surface on the side of the support column close to the substrate; the included angle between the first side wall and the first bottom surface is β, wherein β<α.

5. The display panel of claim 4, wherein the bank has a second side wall, the bank and the first opening sharing the second side wall; the included angle θ between the second side wall and the plane in which the substrate lies is directed to the bank, wherein θ<β.

6. The display panel of claim 2, wherein in the direction from the first opening to the first spacing structure, the width of the bottom surface is D, wherein 2μm≤D≤10μm.

7. The display panel of claim 1, wherein in a direction perpendicular to the plane in which the substrate lies, the depth of the second opening is h1, and the thickness of the first part is H, 2*H / 3≤h1≤H.

8. The display panel of claim 1, wherein the light-emitting device comprises a first electrode, the first electrode being located on the side of the pixel definition layer close to the substrate; in a direction perpendicular to the plane in which the substrate lies, the first opening overlaps the first electrode, and the second opening does not overlap the first electrode.

9. The display panel of claim 1, wherein the surface on the side of the first spacing structure away from the substrate is a concave-convex surface.

10. The display panel of claim 1, wherein the material of the first spacing structure is the same as the material of the pixel definition layer.

11. The display panel of claim 1, wherein the display panel further comprises a support column, the support column being located on the side of the first part away from the substrate. A distance between a surface of the support column on a side away from the substrate and the substrate in a direction perpendicular to a plane in which the substrate lies is d3, and d3>d1.

12. The display panel of claim 11, wherein, The support column and the first spacing structure are of the same material.

13. The display panel of claim 1, wherein, The display panel further comprises a second spacing structure, and the second spacing structure is disposed in the second opening. Opposite two sides of the first spacing structure and the second spacing structure intersect.

14. The display panel of claim 1, wherein, The second opening comprises a first sub-opening between two adjacent first openings, and a first middle line between the two adjacent first openings has equal minimum distances to the two first openings. The first sub-opening overlaps the first middle line.

15. The display panel of claim 1, wherein, The second opening comprises a second sub-opening between two adjacent first openings, and a first middle line between the two adjacent first openings has equal minimum distances to the two first openings. The second sub-opening is on one side of the first middle line.

16. The display panel of claim 1, wherein, The first spacing structure has a height in a direction perpendicular to a plane in which the substrate lies, and a bottom surface of the first spacing structure has a width in a direction from the first opening to the first spacing structure. The light emitting device comprises first and second light emitting devices of different colors, the first spacing structure comprises first and second sub-spacing structures, the first sub-spacing structure surrounds the first light emitting device, and the second sub-spacing structure surrounds the second light emitting device. At least one of the height, the width, and the number of the first and second sub-spacing structures is different.

17. The display panel of claim 1, wherein, The first spacing structure has a height in a direction perpendicular to a plane in which the substrate lies, and a bottom surface of the first spacing structure has a width in a direction from the first opening to the first spacing structure. The light emitting device comprises first, second, and third light emitting devices of different colors, the first spacing structure comprises third and fourth sub-spacing structures, the third sub-spacing structure is between the first and second light emitting devices, and the fourth sub-spacing structure is between the first and third light emitting devices. At least one of the height, the width, and the number of the third and fourth sub-spacing structures is different.

18. A display device comprising: A display panel as claimed in any one of claims 1 to 17.

19. A manufacturing method of a display panel, comprising: The display panel comprises: a substrate; a light emitting device and a pixel definition layer on one side of the substrate, the pixel definition layer comprising an opening region and a bank, the opening region comprising a first opening and a second opening, the first opening being provided with a light emitting device; a first spacing structure in the second opening; wherein, in a direction perpendicular to the plane of the substrate, the distance from the surface of the first spacing structure away from the substrate to the substrate is d1, the bank comprises a first part, the distance from the surface of the first part away from the substrate to the substrate is d2, d1>d2; the manufacturing method comprises: forming the pixel definition layer with the first opening, the second opening and the bank after exposure and development of a halftone mask; manufacturing the first spacing structure in the second opening.

20. The method of manufacturing according to claim 19, wherein, The display panel further comprises a support column, the support column being located on the side of the first part away from the substrate; the manufacturing method comprises: forming the first spacing structure and the support column simultaneously after the process of the pixel definition layer by using an exposure and development process.

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