Display panel and display device

Abstract

The invention discloses a display panel and a display device, relates to the technical field of display, and aims to solve the problem of light leakage of a pixel defining layer and improve the display effect of the display panel. The display panel includes: a substrate layer; the pixel defining layer is arranged on one side of the substrate layer, and a plurality of pixel openings are formed in the pixel defining layer; the pixel defining layer comprises a first pixel defining layer and a second pixel defining layer, the first pixel defining layer is arranged between the substrate layer and the second pixel defining layer, a connecting layer is arranged between the first pixel defining layer and the second pixel defining layer, and the light transmittance of the first pixel defining layer is larger than that of the second pixel defining layer; the orthographic projection of the connecting layer on the substrate layer falls into the orthographic projection of the first pixel defining layer and the second pixel defining layer on the substrate layer, the segment difference of the upper end faces of the first pixel defining layer, the second pixel defining layer and the connecting layer in the first direction is used for forming a first groove structure, and the opening of the first groove structure faces the pixel opening.

Description

TECHNICAL FIELD

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

[0002] At present, display devices with advantages of large generation line production capacity and low cost are widely used in many fields such as television, computer and mobile phone. With the continuous development of display technology, improving the display effect of display panel is one of the important factors to improve user experience. However, in the prior art, the display panel has the problem of light leakage, which easily leads to poor display effect of the display panel. SUMMARY

[0003] Embodiments of the present application provide a display panel and a display device, which can improve the problem of pixel definition layer light leakage and improve the display effect of the display panel.

[0004] In a first aspect, the present application provides a display panel, comprising:

[0005] a substrate layer;

[0006] a pixel definition layer, disposed on one side of the substrate layer, the pixel definition layer being provided with a plurality of pixel openings, the pixel openings penetrating the pixel definition layer in a thickness direction;

[0007] the pixel definition layer comprises a first pixel definition layer and a second pixel definition layer, the first pixel definition layer being disposed between the substrate layer and the second pixel definition layer, and a connecting layer being disposed between the first pixel definition layer and the second pixel definition layer, wherein the light transmittance of the first pixel definition layer is greater than that of the second pixel definition layer;

[0008] a projection of the connecting layer on the substrate layer falls within a projection of the first pixel definition layer and the second pixel definition layer on the substrate layer, and a step difference of end faces of the first pixel definition layer, the second pixel definition layer and the connecting layer in a first direction is used to form a first groove structure, an opening of the first groove structure being disposed towards the pixel openings, wherein the first direction is a direction of a line connecting two adjacent pixel openings.

[0009] In some embodiments, a side surface of the first pixel definition layer in the thickness direction comprises a second groove structure, an opening direction of the second groove structure being disposed towards the pixel openings.

[0010] In some embodiments, the first groove structure communicates with the pixel openings, and / or the second groove structure communicates with the pixel openings.

[0011] In some embodiments, a projection of a bottom of the first recess structure onto the substrate layer does not overlap with a projection of a bottom of the second recess structure onto the substrate layer.

[0012] In some embodiments, a projection of an edge of the pixel opening onto the substrate layer formed by the first pixel defining layer is a first boundary;

[0013] a projection of a bottom of the second recess structure onto the substrate layer is a second boundary;

[0014] a projection of an edge of the pixel opening onto the substrate layer formed by the second pixel defining layer is a third boundary;

[0015] a projection of a bottom of the first recess structure onto the substrate layer is a fourth boundary;

[0016] a distance between the first boundary and the second boundary is greater than a distance between the third boundary and the fourth boundary; and / or,

[0017] a distance between the first boundary and the second boundary is less than a distance between the first boundary and the fourth boundary.

[0018] In some embodiments, a distance between the first boundary and the second boundary is greater than or equal to a thickness of the first pixel defining layer; and / or,

[0019] a distance between the third boundary and the fourth boundary is greater than or equal to a thickness of the connecting layer.

[0020] In some embodiments, a hydrophobicity of the second pixel defining layer is greater than a hydrophobicity of the first pixel defining layer; and / or,

[0021] a hydrophobicity of the connecting layer is greater than a hydrophobicity of the first pixel defining layer.

[0022] In some embodiments, a hydrophobicity of the connecting layer is the same as a hydrophobicity of the second pixel defining layer, and a light transmittance of the connecting layer is greater than a light transmittance of the second pixel defining layer;

[0023] wherein the connecting layer comprises a semiconductor material or a conductive material.

[0024] In some embodiments, the connecting layer comprises a first connecting sub-layer, a second connecting sub-layer, and a third connecting sub-layer, the first connecting sub-layer is disposed between the first pixel defining layer and the second connecting sub-layer, and the second connecting sub-layer is disposed between the first connecting sub-layer and the third connecting sub-layer.

[0025] The second connection sub-layer and the orthographic projection of the second pixel defining layer on the substrate layer fall into the orthographic projection of the first connection sub-layer and the third connection sub-layer on the substrate layer, respectively.

[0026] The step difference of the first connection sub-layer, the second connection sub-layer and the third connection sub-layer in the first direction is used to form a third groove structure.

[0027] In some embodiments, the materials of the first connection sub-layer, the second connection sub-layer and the third connection sub-layer are the same; or,

[0028] The materials of the first connection sub-layer, the second connection sub-layer and the third connection sub-layer are different.

[0029] In some embodiments, the first pixel defining layer includes a first sub-layer, a second sub-layer and a third sub-layer, the first sub-layer is disposed between the substrate layer and the second sub-layer, and the second sub-layer is disposed between the first sub-layer and the third sub-layer.

[0030] The orthographic projection of the first sub-layer and the third sub-layer on the substrate layer covers the orthographic projection of the second sub-layer on the substrate layer.

[0031] The orthographic projection of the second pixel defining layer on the substrate layer falls into the orthographic projection of the second sub-layer on the substrate layer.

[0032] The step difference of the first sub-layer, the second sub-layer and the third sub-layer in the first direction is used to form a second groove structure.

[0033] In some embodiments, the materials of the first sub-layer and the third sub-layer are the same, and the materials of the first sub-layer and the second sub-layer are different.

[0034] In some embodiments, the thicknesses of the first pixel defining layer and the second pixel defining layer are both greater than the thickness of the connection layer; and / or,

[0035] The thicknesses of the first sub-layer and the third sub-layer are both less than or equal to the thickness of the second sub-layer; and / or,

[0036] The thickness of the third sub-layer is equal to the thickness of the first sub-layer.

[0037] In some embodiments, the display panel further includes:

[0038] A support column is disposed on the side of the second pixel defining layer away from the substrate layer, and the orthographic projection of the support column on the substrate layer falls into the orthographic projection of the second pixel defining layer on the substrate layer.

[0039] In a second aspect, the present application provides a display device comprising:

[0040] The display panel according to the first aspect.

[0041] The display panel provided by the present application is provided with two pixel defining layers, and a connecting layer is arranged between the two pixel defining layers. The connecting layer is arranged to improve the adhesion between the first pixel defining layer and the second pixel defining layer. The first recess structure is arranged on the side of the connecting layer in the thickness direction, and the first recess structure separates the light-emitting layer and the horizontal transmission path of the electric charges in the light-emitting layer. The channel and path of the lateral electric leakage are separated, so as to avoid the light-emitting layer of the adjacent pixel from emitting light due to the leakage current, and to avoid the light leakage of the display panel. The display panel provided by the present application can not only avoid the light leakage problem caused by the falling of the second pixel defining layer which plays a role of light shielding, but also avoid the light leakage problem caused by the lateral electric leakage of the display panel, and greatly improve the display effect of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 FIG. 1 is a schematic partial structural view of a display panel provided by an embodiment of the present application;

[0043] Figure 2 FIG. 2 is a schematic partial structural view of another display panel provided by an embodiment of the present application;

[0044] Figure 3 FIG. 3 is a schematic partial structural view of still another display panel provided by an embodiment of the present application;

[0045] Figure 4 FIG. 4 is a schematic partial structural view of yet another display panel provided by an embodiment of the present application;

[0046] Figure 5 FIG. 5 is a schematic partial structural view of a display panel provided by an embodiment of the present application;

[0047] Figure 6 FIG. 6 is a schematic flow chart of a display panel preparation method provided by an embodiment of the present application;

[0048] Figure 7 FIG. 7 is a schematic flow chart of another display panel preparation method provided by an embodiment of the present application;

[0049] Figure 8 FIG. 8 is a schematic structural view of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations of the technical solutions of the present specification. In the case of no conflict, the technical features in the embodiments of the present specification and the embodiments can be combined with each other.

[0051] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element. The term "two or more" includes two or more than two.

[0052] At present, display devices with the advantages of large generation line production capacity and low cost are widely used in many fields such as television, computer and mobile phone. With the continuous development of display technology, improving the display effect of the display panel is one of the important factors to improve the user experience. However, in the prior art, the display panel has the problem of light leakage, which easily leads to poor display effect of the display panel.

[0053] Generally, there are two aspects of common phenomena that cause light leakage in the display panel. On the one hand, the adhesion between the organic material in the pixel defining layer with light shielding effect and the inorganic material under the pixel defining layer is poor, which causes the pixel defining layer with light shielding effect to fall off, and the area where the pixel defining layer with light shielding effect falls off appears light leakage and bright phenomenon. On the other hand, due to the ion injection layer, ion transport layer, hole injection layer and hole transport layer in the light emitting layer of the display panel, there will be partial charge horizontal transmission, forming horizontal leakage, which causes the light emitting layer of the adjacent pixel to have light emission, resulting in light leakage of the display panel.

[0054] The first aspect of the embodiments of the present application provides a display panel. Figure 1 A schematic partial structure diagram of a display panel provided by the embodiments of the present application is shown in FIG. 1. For example, referring to FIG. 1, the display panel 100 includes a substrate 110, a pixel defining layer 120, a first insulating layer 130, a second insulating layer 140, a first electrode layer 150, a second electrode layer 160, and a light emitting layer 170. Figure 1The display panel comprises a substrate layer 100 and a pixel defining layer 200, the pixel defining layer 200 is arranged on one side of the substrate layer 100, the pixel defining layer 200 is provided with a plurality of pixel openings 205, the pixel openings 205 penetrate the pixel defining layer 200 in the thickness direction Y. The pixel defining layer 200 comprises a first pixel defining layer 201 and a second pixel defining layer 203, the first pixel defining layer 201 is arranged between the substrate layer 100 and the second pixel defining layer 203, and a connecting layer 202 is arranged between the first pixel defining layer 201 and the second pixel defining layer 203. The first pixel defining layer 201 can be an inorganic layer, the first pixel defining layer 201 can comprise a single-layer silicon nitride or silicon oxide, or can comprise a laminated silicon nitride and silicon oxide. The second pixel defining layer 203 can be an organic layer, the second pixel defining layer 203 can comprise a mixed material formed by polyimide and black dye. The connecting layer 202 can be an inorganic material, the connecting layer 202 can comprise amorphous silicon or indium gallium zinc oxide. The pixel openings 205 penetrate the connecting layer 202 in the thickness direction Y. The light transmittance of the first pixel defining layer 201 is greater than that of the second pixel defining layer 203. The second pixel defining layer 203 can play a light shielding role. The connecting layer 202 can be used to bond the first pixel defining layer 210 and the second pixel defining layer 203, and can improve the adhesion between the first pixel defining layer 201 and the second pixel defining layer 203, so as to avoid the problem of the second pixel defining layer 203 falling off caused by the direct contact between the first pixel defining layer 201 and the second pixel defining layer 203, thereby improving the adhesion of the second pixel defining layer 203 and avoiding light leakage in the second pixel defining layer falling-off area of the display panel.

[0055] For example, referring to Figure 1The normal projection of the connecting layer 202 on the substrate layer 100 falls within the normal projection of the first pixel defining layer 201 and the second pixel defining layer 203 on the substrate layer, and the step difference of the end surface of the first pixel defining layer 201, the second pixel defining layer 203 and the connecting layer 202 in the first direction X is used to form the first groove structure 204, and the opening of the first groove structure 204 is arranged towards the pixel opening 205, wherein the first direction X is the direction of the line connecting two adjacent pixel openings 205. The light-emitting layer is arranged in the pixel opening 205, and the light-emitting layer includes an ion injection layer, an ion transport layer, a hole injection layer and a hole transport layer, etc. In the light-emitting stage, there will be charges in the ion injection layer, the ion transport layer, the hole injection layer and the hole transport layer in the light-emitting layer, and there will be partial lateral transmission of charges, forming lateral leakage of the light-emitting layer. The first groove structure 204 can block the light-emitting layer, that is, the light-emitting layer is broken at the slot position of the first groove structure 204, thereby blocking the lateral transmission path of the charges in the light-emitting layer, and the channel and path of lateral leakage are blocked to avoid the formation of a lateral current path, thereby avoiding the light-emitting layer of the adjacent pixel from emitting light, causing the display panel to leak light, causing the display panel to leak light. By arranging the first groove structure on the side surface of the connecting layer 202 with high hydrophobicity and in the thickness direction of the connecting layer, the light leakage problem caused by the falling of the second pixel defining layer with light shielding function can be avoided, and the light leakage problem caused by the lateral leakage of the display panel can also be avoided, greatly improving the display effect of the display panel.

[0056] In some embodiments, the second pixel defining layer 203 includes a mixed material formed by polyimide and black dye, and the connecting layer 202 includes indium gallium zinc oxide. The hydrophobicity of the connecting layer 202 is the same as or similar to that of the second pixel defining layer 203, and the hydrophobicity of the connecting layer 202 and the second pixel defining layer 203 is greater than that of the first pixel defining layer 201. The connecting layer 202 with high hydrophobicity serves as an intermediate layer for adhering the first pixel defining layer 201 and the second pixel defining layer 203, which can improve the adhesion between the first pixel defining layer 201 and the second pixel defining layer 203, to avoid the problem of the second pixel defining layer 203 falling caused by the direct contact between the first pixel defining layer 201 and the second pixel defining layer 203, thereby improving the adhesion of the second pixel defining layer 203 and avoiding light leakage in the display panel in the area where the second pixel defining layer falls off.

[0057] The display panel provided by the embodiments of the present application is provided with two pixel definition layers, wherein the light transmittance of the second pixel definition layer is less than that of the first pixel definition layer, and a connecting layer is arranged between the two pixel definition layers. The adhesion between the first pixel definition layer and the second pixel definition layer is improved by arranging the connecting layer, so as to avoid the light leakage caused by the falling of the second pixel definition layer with small light transmittance. The first groove structure is arranged on the side surface in the thickness direction of the connecting layer, the first groove structure separates the light emitting layer, and further separates the horizontal transmission path of the electric charges in the light emitting layer. The channel and path of the lateral electric leakage are separated, so as to avoid the light emission of the light emitting layer of the adjacent pixel caused by the leakage current, and to avoid the light leakage of the display panel. The display panel provided by the present application can not only avoid the light leakage caused by the falling of the second pixel definition layer with the light shielding function, but also can avoid the light leakage caused by the lateral electric leakage of the display panel, and greatly improves the display effect of the display panel.

[0058] Figure 2 Another schematic partial structure diagram of a display panel is provided by the embodiments of the present application. For example, referring to Figure 2The first pixel defining layer 201 includes a first sub-layer 201-1, a second sub-layer 201-2, and a third sub-layer 201-3. The first sub-layer 201-1 is disposed between the substrate layer 100 and the second sub-layer 201-2, and the second sub-layer 201-2 is disposed between the first sub-layer 201-1 and the third sub-layer 201-3. The orthographic projection of the first sub-layer 201-1 and the third sub-layer 201-3 on the substrate layer 100 covers the orthographic projection of the second sub-layer 201-2 on the substrate layer 100, and the orthographic projection of the first sub-layer 201-1 and the third sub-layer 201-3 on the substrate layer 100 can overlap, or the orthographic projection of the third sub-layer 201-3 on the substrate layer 100 can fall within the orthographic projection of the first sub-layer 201-1 on the substrate layer 100. The orthographic projection of the second pixel defining layer 203 on the substrate layer 100 falls within the orthographic projection of the second sub-layer 201-2 on the substrate layer 100. The step difference of the first sub-layer 201-1, the second sub-layer 201-2, and the third sub-layer 201-3 in the first direction X is used to form a second groove structure 201-4. The second groove structure 201-4 is disposed on the side surface of the first pixel defining layer 201 in the thickness direction Y, and the opening direction of the second groove structure 201-4 is disposed toward the pixel opening 205. The second groove structure 201-4 can separate the light-emitting layer, that is, the light-emitting layer is broken at the notch position of the groove of the second groove structure 201-4, thereby separating the lateral transmission path of the charge in the light-emitting layer, and the channel and path of the lateral leakage are separated. The channel and path of the lateral leakage are separated to avoid the formation of a lateral current path, thereby avoiding the light-emitting layer of the adjacent pixel from emitting light, which causes the display panel to leak light. Through the arrangement of the first groove structure 204 and the second groove structure 201-4, the light-emitting layer can be more effectively separated, the lateral leakage of the sub-pixel can be improved or completely eliminated, the picture quality of light emission can be improved, and the problem of low gray scale brightness non-uniformity can be improved, thereby improving the display effect of the display panel.

[0059] In some examples, with reference to Figure 2 The material of the first sub-layer 201-1 and the third sub-layer 201-3 can be the same, and the material of the first sub-layer 201-1 and the second sub-layer 201-2 can be different.

[0060] For example, the material of the first sub-layer 201-1 and the third sub-layer 201-3 is the same, and the material of the first sub-layer 201-1 and the second sub-layer 201-2 is different. The first sub-layer 201-1 and the third sub-layer 201-3 can both include silicon oxide, and the second sub-layer 201-2 can include silicon nitride. By arranging a film layer of different material between two film layers of the same material to form a sandwich structure, the film layer step difference is formed by utilizing the difference in etching rate of different materials to form a second groove structure, without increasing the process flow and reducing the product processing cost.

[0061] In some examples, referring to Figure 2 The material of the first sub-layer 201-1, the second sub-layer 201-2 and the third sub-layer 201-3 are different, the material of the third sub-layer 201-3 and the connecting layer 202 are the same, and the hydrophobicity of the connecting layer 202 is the same as that of the second pixel defining layer 203.

[0062] For example, the first sub-layer can include a silicon oxide material, the second sub-layer can include a silicon nitride material, the third sub-layer can include indium gallium zinc oxide, and the connecting layer 202 can include indium gallium zinc oxide. By setting the third sub-layer 201-3 and the connecting layer 202 to be the same material, the adhesion between the connecting layer 202 and the first pixel defining layer 201 is improved. The hydrophobicity of the connecting layer 202 is the same as that of the second pixel defining layer 203, so as to improve the adhesion between the first pixel defining layer 201 and the second pixel defining layer 203, and avoid the pixel defining layer from falling off. The display panel will not appear bright due to the falling off of the pixel defining layer with light shielding performance, thereby improving the black effect of the display panel.

[0063] In some examples, referring to Figure 2 The material of the first sub-layer 201-1, the second sub-layer 201-2 and the third sub-layer 201-3 are different, the material of the third sub-layer 201-3 and the connecting layer 202 are the same, and the hydrophobicity of the connecting layer 202 is the same as that of the second pixel defining layer 203.

[0064] For example, the first sub-layer 201-1 can include a silicon oxide material, the second sub-layer 201-2 can include a silicon nitride material, the third sub-layer 201-3 can include a-Si (amorphous silicon), and the connecting layer 202 can include a-Si. The material of the third sub-layer 201-3 and the connecting layer 202 are the same, which can improve the adhesion between the connecting layer 202 and the first pixel defining layer 201. The hydrophobicity of the connecting layer 202 is the same as that of the second pixel defining layer 203, which further increases the adhesion between the second pixel defining layer 203 and the connecting layer 202, avoids the second pixel defining layer 203 from falling off, improves the adhesion of the second pixel defining layer 203 itself and the adhesion between the second pixel defining layer and the connecting layer 202, avoids the second pixel defining layer 203 with light shielding performance from falling off, so that in the dark state, the display panel will not appear bright due to the falling off of the pixel defining layer with light shielding performance, improves the falling off problem of the pixel defining layer with light shielding performance, and thereby improves the black effect of the display panel.

[0065] In some examples, the connecting layer 202 includes a-Si. The H (hydrogen) bond or other chemical bond of the surface of the a-Si film layer can also enhance the adhesion of the second pixel defining layer 203. The second pixel defining layer 203 can avoid direct contact with the first sub-layer silicon oxide in the first pixel defining layer 201, and can avoid the second pixel defining layer 203 from falling off. In addition, the a-Si film layer has weak conductivity and similar chemical properties to the first sub-layer silicon oxide in the first pixel defining layer 201. The a-Si can be etched by the etching process of the first pixel defining layer 201, and the second recess structure does not increase additional processes in the process flow. It can be understood that the first recess structure and the second recess structure can be formed by the same etching process. The etching process of the second recess structure is compatible with the etching process of the first recess structure, reduces the etching process steps, and saves processing costs.

[0066] In some examples, the thicknesses of the first sub-layer 201-1 and the third sub-layer 201-3 are less than the thickness of the second sub-layer 201-2, and the thickness of the third sub-layer 201-3 is the same as the thickness of the first sub-layer 201-1. The thickness of the second sub-layer 201-2 is greater than the thicknesses of the first sub-layer 201-1 and the third sub-layer 201-3.

[0067] In some examples, the thicknesses of the first pixel defining layer 201 and the second pixel defining layer 203 are greater than the thickness of the connecting layer 202, and the thickness of the second sub-layer 201-2 is greater than the thickness of the connecting layer 202. The connecting layer 202 serves as an intermediate layer for adhering the first pixel defining layer 201 and the second pixel defining layer 203. The thickness of the connecting layer 202 is much smaller than the thicknesses of the first pixel defining layer 201 and the second pixel defining layer 203 arranged adjacent to each other. By setting the connecting layer 202 as a film layer with a relatively thin thickness, the space occupied by the connecting layer 202 in the display panel can be reduced, the overall film layer of the display panel can be reduced, and the packaging can be facilitated. In addition, the connecting layer 202 can avoid light scattering or reflection caused by an excessively thick film layer, can avoid interference with the light path, can improve the color purity of the display image, and can improve the consistency of the display image at different viewing angles, thereby improving the user experience.

[0068] The display panel provided by the embodiments of the present application can set the projection position relationship and the thickness relationship of the first sub-layer, the second sub-layer, and the third sub-layer of the first pixel defining layer, and can set the projection position relationship and the thickness relationship of the film layers of the second pixel defining layer and the third pixel defining layer according to the connecting layer of different materials. The film layer preparation process can be accurately determined. The third pixel defining layer can be prevented from falling off, the display panel can have an integrated black effect, and the consistency of the film layer process parameters can be improved.

[0069] In some embodiments, the display panel can include a first pixel defining layer, a second pixel defining layer, and a third pixel defining layer. Figure 1 or Figure 2The pixel opening 205 penetrates the pixel defining layer 200. The first groove structure 204 can be in communication with the pixel opening 205; the second groove structure 201-4 can be in communication with the pixel opening 205; the first groove structure 204 and the second groove structure 201-4 can be in communication with the pixel opening 205. The first groove structure 204 being in communication with the pixel opening 205 or the second groove structure 201-4 being in communication with the pixel opening 205 can avoid the horizontally transferred charges in the process of the light emitting layer emitting light from being transferred into the light emitting layer of the adjacent pixel opening. In the case that the light emitting layer in the adjacent pixel opening does not need to be lightened, the light emitting layer in the current pixel opening will not cause the light emitting layer in the adjacent pixel opening to emit light in the process of the light emitting layer in the current pixel opening being lightened, thereby avoiding the problem of light leakage of the display panel and improving the display effect of the display panel.

[0070] In some embodiments, referring to Figure 1 or Figure 2 The projection of the bottom of the first groove structure 204 on the substrate layer 100 does not overlap with the projection of the bottom of the second groove structure 201-4 on the substrate layer 100. The first groove structure 204 is located on the side of the second groove structure 201-4 away from the pixel opening 205. By using two groove structures to separate the light emitting layer, the separation effect of the pixel opening is greatly improved, and the horizontally transferred charges in the process of the light emitting layer emitting light are prevented from being transferred into the light emitting layer of the adjacent pixel opening, thereby improving the display effect of the display panel.

[0071] Figure 3 Another schematic partial structure diagram of a display panel is provided in the embodiments of the present application. For example, referring to Figure 3The first pixel defining layer 201 is used to form the edge of the pixel opening 205 on the substrate layer 100 as the first boundary A1. The bottom of the second groove structure 201-4 on the substrate layer 100 as the second boundary A2. The second pixel defining layer 203 is used to form the edge of the pixel opening 205 on the substrate layer 100 as the third boundary A3. The bottom of the first groove structure 204 on the substrate layer 100 as the fourth boundary A4. The distance between the first boundary A1 and the second boundary A2 is the first distance L1, and the distance between the third boundary A3 and the fourth boundary A4 is the second distance L2. The first distance L1 is greater than the second distance L2, that is, the distance between the bottom of the first groove structure 204 and the edge of the pixel opening 205 is greater than the distance between the bottom of the second groove structure 201-4 and the edge of the pixel opening 205. The bottom of the first groove structure 204 is recessed compared to the bottom of the second groove structure 201-4, so the bottom of the first groove structure 204 and the bottom of the second groove structure 201-4 on the substrate layer 100 have no overlap, at this time, the first groove structure 204 and the second groove structure 201-4 are stacked in the thickness direction Y to form a stepped structure, and then better isolate the light-emitting layer. By forming two groove structures with different distances from the edge of the pixel opening on the stacked structure of the first pixel defining layer 201 and the second pixel defining layer 203, the physical guidance of the light-emitting material for evaporation or inkjet printing can be provided to obtain the light-emitting layer, avoid material overflow to adjacent pixels, and reduce the risk of color mixing of the display panel. The groove structure can also accommodate encapsulation materials to block water and oxygen from penetrating into the pixel opening along the sidewall of the pixel defining layer, protecting the light-emitting material. Improve the steepness of the pixel edge to ensure color purity under high resolution.

[0072] For example, referring to Figure 3The distance between the first boundary A1 and the second boundary A2 is a first distance L1, and the distance between the first boundary A1 and the fourth boundary A4 is a third distance L3. The first distance L1 is less than the third distance L3, where the first distance L1 is the vertical distance between the first boundary A1 and the second boundary A2, and the third distance L3 is the vertical distance between the first boundary A1 and the fourth boundary A4. The first recess structure 204 is formed by the segment difference of the second pixel boundary layer 203, the connecting layer 202 and the third sub-layer 301-1 close to one end of the pixel opening 205 in the first direction X. The second recess structure 201-4 is formed by the segment difference of the end surface of the first sub-layer 201-1, the second sub-layer 201-2 and the third sub-layer 201-3 in the first direction X. The first distance L1 is less than the second distance L2, that is, the groove depth of the first recess structure 204 is less than the groove depth of the second recess 301-4. The first recess structure 204 is arranged in a recessed manner compared with the second recess structure 201-4, and at this time, the first recess structure 204 and the second recess structure 201-4 are connected to form a stepped structure. The materials of the first recess structure 204 and the second recess structure 201-4 both include indium tin oxide or indium gallium zinc oxide, which has a light reflecting function. In the case where the materials of the first recess structure 204 and the second recess structure 201-4 both include indium tin oxide or indium gallium zinc oxide, the sidewall of the stepped structure formed by the connection of the first recess structure 204 and the second recess structure 201-4 can reflect the light emitted by the light-emitting layer to the light-emitting side of the display panel, so as to reduce the loss caused by total reflection in the pixel opening and improve the display brightness.

[0073] In some embodiments, reference is made to Figure 3, the distance between the first boundary A1 and the second boundary A2 is a first distance L1, and the distance between the third boundary A3 and the fourth boundary A4 is a second distance L2, wherein the second distance L2 is the vertical distance between the third boundary A3 and the fourth boundary A4. The first distance L1 is greater than or equal to the thickness of the first pixel defining layer 201, i.e. the groove depth of the second groove structure 201-4 is greater than the thickness of the first pixel defining layer 201. The second distance L2 is greater than or equal to the thickness of the connecting layer 202, i.e. the depth of the first groove structure 204 is greater than or equal to the thickness of the connecting layer 202. The size of the first distance L1 ranges from 1000 nm to 1500 nm, for example, it can be 1100 nm, 1200 nm, 1300 nm or 1400 nm. The size of the second distance ranges from 1600 nm to 5000 nm, for example, it can be 1800 nm, 2000 nm, 2500 nm or 3000 nm. The thickness of the connecting layer 202 ranges from 10 angstroms to 30 angstroms, for example, it can be 1.5 nm, 1.70 nm, 2 nm or 2.5 nm. By setting the groove depth of the second groove structure 201-4 to be greater than the thickness of the first pixel defining layer 201, and setting the groove depth of the first groove structure 204 to be greater than or equal to the thickness of the connecting layer, the overlap of the light emitting layer in different pixel openings 205 is better blocked, the possibility of lateral leakage is greatly reduced, and the reliability of the product is improved to improve the picture quality of the display panel.

[0074] Figure 4 Another schematic partial structure diagram of a display panel is provided for the embodiments of the present application. For example, referring to FIG. 6, the display panel includes a substrate 200, a first pixel defining layer 201, a second pixel defining layer 202, a first groove structure 204, a second groove structure 201-4, a first light emitting layer 205, a second light emitting layer 206, a third light emitting layer 207, a fourth light emitting layer 208, a first electrode 209, a second electrode 210, a third electrode 211 and a fourth electrode 212. Figure 4The connecting layer 202 includes a first connecting sub-layer 202-1, a second connecting sub-layer 202-2, and a third connecting sub-layer 202-3. The first connecting sub-layer 202-1 is arranged between the first pixel defining layer 201 and the second connecting sub-layer 202-2. The second connecting sub-layer 202-2 is arranged between the first connecting sub-layer 202-1 and the third connecting sub-layer 202-3. The second connecting sub-layer 202-2 and the orthographic projection of the substrate layer 100 fall within the orthographic projection of the first connecting sub-layer 202-1 and the third connecting sub-layer 202-3 on the substrate layer 100. The step difference of the first connecting sub-layer 202-1, the second connecting sub-layer 202-2, and the third connecting sub-layer 202-3 in the first direction X is used to form a third groove structure 202-4. The third groove structure 202-4 is located on the side of the second groove structure 201-4 away from the pixel opening. The orthographic projection of the third sub-layer 201-3 on the substrate layer 100 coincides with the orthographic projection of the second pixel defining layer 203 on the substrate layer 100. The third groove structure 202-4 is in communication with the pixel opening. The third groove structure 202-4 can separate the light-emitting layer, i.e., the light-emitting layer is broken at the notch position of the groove of the second groove structure 201-4, thereby separating the lateral transmission path of the charge in the light-emitting layer, and the channel and path of the lateral leakage are separated to avoid the formation of a lateral current path. The lateral leakage of the sub-pixel is improved or completely eliminated, thereby improving the picture quality of light emission and improving the display effect of the display panel.

[0075] In some examples, with reference to Figure 4 The materials of the first connecting sub-layer 202-1 and the third connecting sub-layer 202-3 can be the same, and the materials of the first connecting sub-layer 202-1 and the second connecting sub-layer 202-2 can be different.

[0076] For example, the materials of the first connecting sub-layer 202-1 and the third connecting sub-layer 202-3 are the same, and the materials of the first connecting sub-layer 202-1 and the second connecting sub-layer 202-2 are different. The first connecting sub-layer 202-1 and the third connecting sub-layer 202-3 can both include indium gallium zinc oxide, and the second connecting sub-layer 202-2 can include a-Si. By arranging a layer of film with different materials between two layers of film with the same material to form a sandwich structure, the difference in etching rate of different materials can be used to quickly form a third groove structure by one wet etching process, reducing the etching process steps and reducing the difficulty of process processing.

[0077] In some examples, the materials of the first connecting sub-layer 202-1, the second connecting sub-layer 202-2, and the third connecting sub-layer 202-3 are all different. The materials of the first connecting sub-layer 202-1 and the third sub-layer 201-3 are the same, and the third connecting sub-layer 202-3 and the second pixel defining layer 203 have the same hydrophobicity.

[0078] Exemplarily, the first connecting sub-layer 202-1 can include a-Si, the second connecting sub-layer 202-2 can include indium tin oxide, and the third connecting sub-layer 202-3 can include indium gallium zinc oxide, and the material of the third sub-layer 201-3 in the first pixel defining layer 201 can include a-Si. By setting the material of the third sub-layer 201-3 to be the same as the material of the first connecting sub-layer 202-1 of the connecting layer 202, the adhesion between the connecting layer 202 and the first pixel defining layer 201 is improved. By setting the third connecting sub-layer 202-3 to have the same hydrophobicity as the second pixel defining layer 203, the adhesion between the third connecting sub-layer 202-3 and the second pixel defining layer 203 is further improved. In this way, the adhesion between the first pixel defining layer 201 and the second pixel defining layer 203 is improved, and the pixel defining layer is prevented from falling off. The display panel is prevented from being brightened due to the falling off of the pixel defining layer having light shielding performance, and the black effect of the display panel is improved.

[0079] In some examples, the first connecting sub-layer 202-1, the second connecting sub-layer 202-2, and the third connecting sub-layer 202-3 have different materials. Figure 2

[0080] ​For example, the first connecting sub-layer 202-1 can include indium gallium zinc oxide, the second connecting sub-layer 202-2 can include a-Si, and the third connecting sub-layer 202-3 can include indium tin oxide. The first sub-layer 201-1 in the first pixel defining layer includes silicon oxide, the second sub-layer 201-2 includes silicon nitride, and the third sub-layer 201-3 includes indium gallium zinc oxide. The third sub-layer 201-3 and the first connecting sub-layer 202-1 in the connecting layer 202 are made of the same material, which can improve the adhesion between the first pixel defining layer 201 and the connecting layer 202. The hydrophobicity of the indium gallium zinc oxide is the same as that of the organic material in the second pixel defining layer 203. Integrating the second pixel defining layer 203 and the connecting layer 202 with the same hydrophobicity can further increase the adhesion between the second pixel defining layer 203 and the connecting layer 202, prevent the second pixel defining layer 203 from falling off, improve the adhesion of the second pixel defining layer 203 itself, and the adhesion between the second pixel defining layer and the connecting layer 202, thereby preventing the second pixel defining layer 203 with light-shielding performance from falling off. By setting the first connecting sub-layer 202-1 and the third sub-layer 201-3 to be made of the same material and setting the third connecting sub-layer 202-3 and the second pixel defining layer to have the same hydrophobicity, the adhesion of the connecting layer 202 itself is improved, the connecting layer 202 has better bonding effect, and the adhesion between the first pixel defining layer 201, the connecting layer 202, and the second pixel defining layer 203 is further improved. The display panel is prevented from being bright due to the falling off of the pixel defining layer with light-shielding performance, the falling off problem of the pixel defining layer with light-shielding performance is improved, and the black effect of the display panel is further improved.

[0081] In some examples, the thicknesses of the first connecting sub-layer 202-1 and the third connecting sub-layer 202-3 are both less than the thickness of the second connecting sub-layer 202-2, and the thickness of the third connecting sub-layer 202-3 is equal to the thickness of the first connecting sub-layer 202-1. By setting the film layer thickness of the second connecting sub-layer 202-2 to be greater than the thicknesses of the first connecting sub-layer 202-1 and the third connecting sub-layer 202-3, the contact area of the film layer of the second connecting sub-layer 202-2 with the etching liquid can be increased, the etching rate of the film layer of the second connecting sub-layer 202-2 can be improved, and the third groove structure 202-4 can be quickly processed, thereby improving the processing efficiency.

[0082] The display panel provided by the present application can accurately determine the film layer preparation process by setting the position relationship of the projection between the film layers and the size relationship of the film layer thicknesses of the first connecting sub-layer, the second connecting sub-layer, and the third connecting sub-layer in the connecting layer, the first pixel defining layer, and the second pixel defining layer according to the connecting layer of different materials, avoid the third pixel defining layer from falling off, improve the all-black effect of the display panel, and improve the consistency of the film layer preparation.

[0083] Figure 5 This is a schematic partial structural diagram of a display panel provided in an embodiment of the present application. For example, Figure 5 As shown, the display bread also includes support columns 300. The support columns 300 are disposed on the side of the second pixel defining layer 203 away from the substrate layer 100. The orthographic projection of the support columns 300 on the substrate layer 100 falls within the orthographic projection of the second pixel defining layer 203 on the substrate layer 100. During the process of evaporating the luminescent material, the support columns are used to support the evaporation mask used for evaporating the luminescent material, thereby preventing the mask from directly contacting the second pixel defining layer 203 and causing wear on the film surface of the second pixel defining layer 203.

[0084] Exemplary, reference Figure 5 The display panel further includes a first organic insulating layer 101 and an anode 102 . The anode 102 is disposed on one side of the anode 102 . The first organic insulating layer 101 is disposed between the substrate layer 100 and the anode 102 .

[0085] Figure 6 A schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application. In some embodiments, as Figure 6 As shown, when the connection layer 202 includes indium gallium zinc oxide, the method for preparing the display panel includes:

[0086] S101 : forming a first organic insulating layer 101 on a substrate layer 100 , forming an anode 102 on a side of the first organic insulating layer 101 away from the substrate layer 100 , and forming a first pixel defining layer 201 on a side of the anode 102 away from the substrate layer 100 .

[0087] Exemplarily, the preparation process for the first pixel defining layer 201 includes sequentially depositing silicon oxide, silicon nitride, and silicon oxide film layers on the surface of the anode 102. These layers are then dry-etched to form a first sublayer 201-1, a second sublayer 201-2, and a third sublayer 201-3. The step difference between the first sublayer 201-1, the second sublayer 201-2, and the third sublayer 201-3 near one end of the pixel opening forms a second groove structure 201-4.

[0088] S102 : preparing a connection layer 202 on a side of the first pixel defining layer 201 away from the substrate layer.

[0089] Exemplarily, an indium gallium zinc oxide film layer is formed on one side of the third sublayer of the first pixel defining layer 201 , and the thickness of the indium gallium zinc oxide film layer ranges from 10 angstroms to 30 angstroms.

[0090] S103 : preparing an organic layer doped with black dye on a side of the connection layer 202 away from the substrate layer 100 .

[0091] S104: Dry etching the black dye-doped layer to form the second pixel defining layer 203.

[0092] S105: Preparing the support column 300 on the side of the second pixel defining layer away from the substrate layer 100.

[0093] S106: Wet etching the indium gallium zinc oxide film layer to form the connection layer 202 with the first recess structure 202-4.

[0094] Figure 7 Another schematic flow chart of a method for preparing a display panel is provided in the embodiments of the present application. For example, referring to Figure 6 and Figure 7 , the display panel comprises a display area AA and a non-display area HIAA. The display area AA comprises a substrate layer 100, a first organic insulating layer 101, an anode 102, a first pixel defining layer 201, a second pixel defining layer 203 and a connection layer 202. The connection layer 202 is located in the display area AA. The non-display area HIAA comprises a silicon substrate 500, a gate insulating layer 501, a gate electrode layer 502, a second organic insulating layer 503, a source-drain electrode layer 504 and the connection layer 202. The connection layer 202 in the display area AA and the connection layer 202 in the non-display area HIAA are the same layer.

[0095] For example, referring to Figure 6 and Figure 7 , the method for preparing the display panel further comprises:

[0096] Step S107: Preparing the connection layer 202 on the side of the pixel defining layer 200 in the display area AA away from the substrate layer 100, and also preparing the connection layer 202 on the side of the source-drain electrode layer 504 in the non-display area HIAA away from the silicon substrate 500, i.e. the connection layers in the display area AA and the non-display area HIAA are the same layer. The connection layer 202 in the display area AA is provided with the second pixel defining layer 203 on the side away from the substrate layer 100.

[0097] Step S108: Preparing the optical adhesive layer 206 on the side of the connection layer 202 in the display area AA and the non-display area HIAA.

[0098] Step S109: Removing the optical adhesive layer 206. The source-drain electrode layer 504 in the non-display area HIAA is provided with the via hole 505 while the optical adhesive layer 206 in the display area AA is removed.

[0099] Step S110: removing the connecting layer 202, which can be removed by wet etching. The connecting layer 202 in the display area AA is removed at the same time as the isolation groove 506 is formed between the non-display areas HIAA. The etching of the display area connecting layer 202 and the etching of the isolation groove 506 are performed by the same etching process. The isolation groove 506 is located between the display area AA and the non-display area HIAA, and is used to separate the display area AA and the non-display area HIAA, so as to avoid the occurrence of leakage current and affect the light emission of the display area AA. The connecting layer 202 is prepared on the side of the pixel definition layer 200 in the display area AA away from the substrate layer 100, and the connecting layer 202 is also formed on the side of the source-drain electrode layer 504 in the non-display area HIAA away from the silicon substrate 500. The etching of the connecting layer 202 and the etching of the isolation groove 506 are performed by the same etching process, which improves the process compatibility of the display area AA and the non-display area HIAA, does not need to increase the process flow, and saves the processing cost of the display panel.

[0100] In a second aspect, the present application provides a display device. Figure 8 A schematic structural diagram of a display device provided by the present application is shown in FIG. 2. As shown in FIG. 2, the display device 2000 includes a display panel 1000. Figure 8

[0101] The display panel provided by the present application is provided with two pixel definition layers, and a connecting layer is arranged between the two pixel definition layers. The connecting layer is arranged to improve the adhesion between the first pixel definition layer and the second pixel definition layer. A first groove structure is arranged on the side of the connecting layer in the thickness direction of the connecting layer. The first groove structure separates the light-emitting layer, and further separates the lateral transmission path of the electric charges in the light-emitting layer. The lateral leakage channel and path are separated, so as to avoid the light emission of the light-emitting layer of the adjacent pixel due to the leakage current, and avoid the light leakage of the display panel. The display panel provided by the present application can not only avoid the light leakage problem caused by the falling of the second pixel definition layer which has the light shielding effect, but also avoid the light leakage problem caused by the lateral leakage of the display panel, and greatly improve the display effect of the display panel.

[0102] The display device provided by the present application can include a television, a computer, a smart phone, a smart wearable device, a notebook computer, a tablet computer, and the like. The smart wearable device can include a smart watch, an AR (Augmented Reality) device, a VR (Virtual Reality) device, and the like.

[0103] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0104] ​The above examples are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0105] Although the preferred embodiments of the present specification have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present specification.

[0106] Obviously, those skilled in the art can make various modifications and variations to the present specification without departing from the spirit and scope of the present specification. Thus, if these modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the present specification also intends to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: substrate layer; a pixel defining layer, disposed on one side of the substrate layer, the pixel defining layer being provided with a plurality of pixel openings, the pixel openings penetrating the pixel defining layer in a thickness direction; The pixel defining layer includes a first pixel defining layer and a second pixel defining layer, wherein the first pixel defining layer is disposed between the substrate layer and the second pixel defining layer, and a connecting layer is disposed between the first pixel defining layer and the second pixel defining layer, wherein the light transmittance of the first pixel defining layer is greater than the light transmittance of the second pixel defining layer; The orthographic projection of the connecting layer on the substrate layer falls within the orthographic projections of the first pixel defining layer and the second pixel defining layer on the substrate layer, and the step difference between the end faces of the first pixel defining layer, the second pixel defining layer and the connecting layer in the first direction is used to form a first groove structure, and the opening of the first groove structure is set toward the pixel opening, wherein the first direction is the direction of the line connecting two adjacent pixel openings.

2. The display panel according to claim 1, wherein: A side surface of the first pixel defining layer in the thickness direction includes a second groove structure, and an opening direction of the second groove structure is arranged toward the pixel opening.

3. The display panel according to claim 2, wherein: The first groove structure is connected to the pixel opening, and / or the second groove structure is connected to the pixel opening.

4. The display panel according to claim 3, wherein: An orthographic projection of the groove bottom of the first groove structure on the substrate layer does not overlap with an orthographic projection of the groove bottom of the second groove structure on the substrate layer.

5. The display panel according to claim 4, wherein: The orthographic projection boundary of the edge of the first pixel defining layer for forming the pixel opening on the substrate layer is a first boundary; The orthographic projection boundary of the groove bottom of the second groove structure on the substrate layer is a second boundary; The orthographic projection boundary of the edge of the second pixel defining layer used to form the pixel opening on the substrate layer is the third boundary; The orthographic projection boundary of the groove bottom of the first groove structure on the substrate layer is a fourth boundary; The distance between the first boundary and the second boundary is greater than the distance between the third boundary and the fourth boundary; and / or, A distance between the first boundary and the second boundary is smaller than a distance between the first boundary and the fourth boundary.

6. The display panel according to claim 5, wherein: The distance between the first boundary and the second boundary is greater than or equal to the thickness of the first pixel defining layer; and / or, A distance between the third boundary and the fourth boundary is greater than or equal to a thickness of the connection layer.

7. The display panel according to claim 1, wherein: The hydrophobicity of the second pixel defining layer is greater than the hydrophobicity of the first pixel defining layer; and / or, The hydrophobicity of the connecting layer is greater than the hydrophobicity of the first pixel defining layer.

8. The display panel according to claim 7, wherein: The connecting layer and the second pixel defining layer have the same hydrophobicity, and the light transmittance of the connecting layer is greater than the light transmittance of the second pixel defining layer; Wherein, the connecting layer includes semiconductor material or conductive material.

9. The display panel according to claim 1, wherein: The connection layer includes a first connection sublayer, a second connection sublayer, and a third connection sublayer, wherein the first connection sublayer is disposed between the first pixel defining layer and the second connection sublayer, and the second connection sublayer is disposed between the first connection sublayer and the third connection sublayer; The orthographic projections of the second connecting sublayer and the third connecting sublayer on the substrate layer fall within the orthographic projections of the first connecting sublayer and the third connecting sublayer on the substrate layer respectively; The step difference between the end surfaces of the first connecting sublayer, the second connecting sublayer, and the third connecting sublayer in the first direction is used to form a third groove structure.

10. The display panel according to claim 9, wherein: The first connecting sublayer, the second connecting sublayer and the third connecting sublayer are made of the same material; or The first connecting sublayer, the second connecting sublayer, and the third connecting sublayer are made of different materials.

11. The display panel according to any one of claims 1 to 10, characterized in that: The first pixel defining layer includes a first sublayer, a second sublayer, and a third sublayer, wherein the first sublayer is disposed between the substrate layer and the second sublayer, and the second sublayer is disposed between the first sublayer and the third sublayer; The orthographic projections of the first sublayer and the third sublayer on the substrate layer both cover the orthographic projection of the second sublayer on the substrate layer; The orthographic projection of the second pixel defining layer on the substrate layer falls within the orthographic projection of the second sub-layer on the substrate layer; The step difference between the end surfaces of the first sub-layer, the second sub-layer, and the third sub-layer in the first direction is used to form a second groove structure.

12. The display panel according to claim 11, wherein: The first sub-layer and the third sub-layer are made of the same material, and the first sub-layer and the second sub-layer are made of different materials.

13. The display panel according to claim 12, wherein: The thickness of the first pixel defining layer and the second pixel defining layer are both greater than the thickness of the connecting layer; and / or, The thickness of the first sublayer and the third sublayer are both less than or equal to the thickness of the second sublayer; and / or, The thickness of the third sub-layer is equal to the thickness of the first sub-layer.

14. The display panel according to any one of claims 1 to 10, 12 to 13, characterized in that: Also includes: A support column is provided on a side of the second pixel defining layer away from the substrate layer, and an orthographic projection of the support column on the substrate layer falls within an orthographic projection of the second pixel defining layer on the substrate layer.

15. A display device, characterized in that: include: The display panel according to any one of claims 1 to 14.

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