Display panel and display device

Abstract

The invention discloses a display panel and a display device, relates to the technical field of display, and can improve the integrated black 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 comprises a first pixel defining layer, a second pixel defining layer and a third pixel defining layer, the second pixel defining layer is arranged on the side, away from the substrate layer, of the first pixel defining layer, and the third pixel defining layer is arranged on the side, away from the first pixel defining layer, of the second pixel defining layer; the hydrophobicity of the second pixel defining layer is greater than that of the first pixel defining layer, and the hydrophobicity of the third pixel defining layer is greater than that of the first pixel defining layer; the light transmittance of the third pixel defining layer is smaller than that of the first pixel defining layer.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] Currently, display devices with advantages such as large-generation production capacity and low cost are widely used in multiple fields such as televisions, computers, and mobile phones. With the rise of display technologies, improving the brightness of the display screen of a display is one of the important factors for enhancing the user experience. Therefore, it is very important to improve the display effect of the display. However, in the prior art, there is a problem that the pixel defining layer of the display panel is prone to peeling off. As a result, in the dark state of the display panel, the peeled-off area of the pixel defining layer appears bright, affecting the integrated black effect of the display panel. Summary of the Invention

[0003] Embodiments of this application provide a display panel and a display device, which can improve the problem of peeling off of the pixel defining layer, and thus can enhance the integrated black effect of the display panel.

[0004] In the first aspect of the embodiments of this application, a display panel is provided, including:

[0005] A substrate layer;

[0006] A pixel defining layer, disposed on one side of the substrate layer, the pixel defining layer includes a first pixel defining layer, a second pixel defining layer, and a third pixel defining layer, the second pixel defining layer is disposed on the side of the first pixel defining layer away from the substrate layer, and the third pixel defining layer is disposed on the side of the second pixel defining layer away from the first pixel defining layer;

[0007] The second pixel defining layer has a greater hydrophobicity than the first pixel defining layer, and the third pixel defining layer has a greater hydrophobicity than the first pixel defining layer;

[0008] The third pixel defining layer has a lower light transmittance than the first pixel defining layer.

[0009] In some embodiments, the second pixel defining layer has a lower hydrophilicity than the first pixel defining layer, and the third pixel defining layer has a lower hydrophilicity than the first pixel defining layer; and / or,

[0010] The third pixel defining layer has the same hydrophobicity as the second pixel defining layer.

[0011] In some embodiments, the orthographic projection of the third pixel defining layer on the substrate layer partially covers the orthographic projection of the second pixel defining layer on the substrate layer;

[0012] The positive projection of the second pixel defining layer on the substrate layer at least partially overlaps with the positive projection of the first pixel defining layer on the substrate layer.

[0013] In some embodiments, the pixel defining layer is provided with a plurality of pixel openings, and the pixel openings penetrate the pixel defining layer in the thickness direction;

[0014] The side surface of the first pixel defining layer in the thickness direction includes a groove structure, and the opening direction of the groove structure faces the pixel opening.

[0015] In some embodiments, the groove depth of the groove structure in the first direction is greater than or equal to the thickness of the first pixel defining layer, where the first direction is the direction from the pixel defining layer to the pixel opening.

[0016] In some embodiments, the first pixel defining layer includes a first sub-layer, a second sub-layer, and a third sub-layer. The second sub-layer is disposed on a side of the first sub-layer away from the substrate layer, and the third sub-layer is disposed on a side of the second sub-layer away from the first sub-layer;

[0017] The positive projection of the second sub-layer on the substrate layer falls within the positive projection of the first sub-layer on the substrate layer, and the positive projection of the second sub-layer on the substrate layer falls within the positive projection of the third sub-layer on the substrate layer.

[0018] In some embodiments, the positive projection of the third pixel defining layer on the substrate layer falls within the positive projection of the second sub-layer on the substrate layer; and / or,

[0019] The positive projection of the second pixel defining layer on the substrate layer coincides with the positive projection of the third sub-layer on the substrate layer;

[0020] Or,

[0021] The positive projection of the second pixel defining layer on the substrate layer falls within the positive projection of the third sub-layer on the substrate layer.

[0022] In some embodiments, the positive projection of the third sub-layer on the substrate layer falls within the positive projection of the first sub-layer on the substrate layer.

[0023] In some embodiments, the thicknesses of both the first pixel defining layer and the third pixel defining layer are greater than the thickness of the second pixel defining layer; and / or,

[0024] The thicknesses of both the first sub-layer and the third sub-layer are less than the thickness of the second sub-layer; and / or,

[0025] The thickness of the third sub-layer is equal to the thickness of the first sub-layer.

[0026] In some embodiments, 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; or,

[0027] The first sub-layer, the second sub-layer, and the third sub-layer are made of different materials; and / or,

[0028] The second pixel defining layer includes metal oxide.

[0029] In some embodiments, the edge slope angle of the second pixel defining layer is less than or equal to the edge slope angle of the first pixel defining layer; and / or,

[0030] The edge slope angle of the third pixel defining layer is less than the edge slope angle of the second pixel defining layer.

[0031] In some embodiments, the thickness range of the first pixel defining layer is from 1000 nm to 1600 nm; and / or,

[0032] The thickness range of the second pixel defining layer is from 1 nm to 3 nm; and / or,

[0033] The thickness range of the third pixel defining layer is from 1000 nm to 1200 nm.

[0034] In a second aspect of the embodiments of the present application, a display device is provided.

[0035] The display panel as described in the first aspect.

[0036] The display panel provided by the embodiment of the present application sets the third pixel defining layer as an organic layer doped with black dye, and sets the light transmittance of the third pixel defining layer to be less than that of the first pixel defining layer, so that the third pixel defining layer has a light shielding property. The second pixel defining layer with relatively high hydrophobicity is used as an intermediate layer and as an adhesive layer between the organic layer and the inorganic layer. And it is set that the hydrophobicities of the second pixel defining layer and the third pixel defining layer are both greater than that of the first pixel defining layer, so that the adhesion force between the second pixel defining layer and the third pixel defining layer with similar hydrophobicities is higher, avoiding the peeling off of the third pixel defining layer. Regarding the second pixel defining layer and the third pixel defining layer with similar hydrophobicities as an integral structure can increase the thickness of the pixel defining layer film, further increase the adhesion force between the second pixel defining layer and the first pixel defining layer, avoid the peeling off of the third pixel defining layer, improve the adhesion force among the third pixel defining layer, the second pixel defining layer and the third pixel defining layer, avoid the peeling off of the third pixel defining layer with a light shielding property, so that in the dark state of the display panel, the display panel will not have the phenomenon of the display panel emitting light due to the peeling off of the pixel defining layer with a light shielding property, improve the problem of the peeling off of the pixel defining layer with a light shielding property, and further improve the black effect of the display panel. Description of the Drawings

[0037] Figure 1 It is a schematic partial structural diagram of a display panel provided by an embodiment of the present application;

[0038] Figure 2 It is a schematic partial structural diagram of another display panel provided by an embodiment of the present application;

[0039] Figure 3 It is a schematic partial structural diagram of yet another display panel provided by an embodiment of the present application;

[0040] Figure 4 It is a schematic partial structural diagram of still another display panel provided by an embodiment of the present application;

[0041] Figure 5 It is a schematic partial structural diagram of a display panel provided by an embodiment of the present application;

[0042] Figure 6 It is a schematic partial structural diagram of another display panel provided by an embodiment of the present application;

[0043] Figure 7 It is a schematic flow chart of a display panel manufacturing method provided by an embodiment of the present application;

[0044] Figure 8 It is a schematic flow chart of another display panel manufacturing method provided by an embodiment of the present application;

[0045] Figure 9A schematic structural diagram of a display device provided by an embodiment of the present application. Detailed implementation manners

[0046] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of this specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.

[0047] In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including an..." does not exclude the presence of additional identical elements in the process, method, article or device including the element. The term "more than two" includes two or more than two.

[0048] Currently, display devices with advantages such as large-generation line production capacity and low cost are widely used in many fields such as televisions, computers, and mobile phones. With the rise of display technology, improving the brightness of the display screen of a display is one of the important factors for enhancing the user experience. Therefore, it is very important to improve the display effect of the display. However, in the prior art, there is a problem that the pixel definition layer of the display panel is prone to peeling off. The peeled-off pixel definition layer with a light-shielding effect is likely to cause light leakage and brightening in the area where the pixel definition layer peels off in the dark state of the display panel, affecting the integrated black effect of the display panel.

[0049] Generally, the adhesion between a silicon oxide material film layer and a mixed material film layer formed by polyimide and a black dye is poor, which is likely to cause the film layer with light-shielding performance to peel off, affecting the integrated black effect of the display panel.

[0050] In the first aspect of the embodiments of the present application, a display panel is provided. Figure 1 A schematic partial structural diagram of a display panel provided by an embodiment of the present application. Exemplarily, refer to Figure 1, the display panel includes a substrate layer 100 and a pixel defining layer 200, and the pixel defining layer 200 is disposed on one side of the substrate layer 100. The pixel defining layer 200 includes a first pixel defining layer 201, a second pixel defining layer 202, and a third pixel defining layer 203. The second pixel defining layer 202 is disposed on the side of the first pixel defining layer 201 away from the substrate layer 100, and the third pixel defining layer 203 is disposed on the side of the second pixel defining layer 202 away from the first pixel defining layer 201. The first pixel defining layer 201 can be an inorganic layer. The first pixel defining layer 201 can include silicon nitride or silicon oxide provided in a single layer, or can include stacked silicon nitride and silicon oxide. The second pixel defining layer 202 can be a metal oxide or an organic material. The second pixel defining layer 202 can include indium tin oxide or polyimide. The third pixel defining layer 203 can be an organic layer. The third pixel defining layer 203 can include a hybrid material formed by polyimide and a black dye. The light transmittance of the third pixel defining layer 203 is less than that of the first pixel defining layer 201. The third pixel defining layer 203 can be used to block the large-angle light emitted by the light-emitting layer. The first pixel defining layer 201 can be a hydrophilic film layer, the second pixel defining layer 202 can be a hydrophobic film layer, and the third pixel defining layer 203 can be a hydrophobic film layer. The hydrophobicity of the second pixel defining layer 202 is greater than that of the first pixel defining layer 201, the hydrophobicity of the third pixel defining layer 203 is greater than that of the first pixel defining layer 201, and the hydrophobicity of both the second pixel defining layer 202 and the third pixel defining layer 203 is greater than that of the first pixel defining layer 201. That is, the hydrophobicity of the second pixel defining layer 202 and the third pixel defining layer 203 is similar. The second pixel defining layer 202 and the third pixel defining layer 203 with similar hydrophobicity have better adhesion, so that the third pixel defining layer 203 doped with a black dye is not easily detached. The good adhesion between the second pixel defining layer 202 and the third pixel defining layer 203 can use the second pixel defining layer 202 and the third pixel defining layer 203 as an integral structure and cover it above the first pixel defining layer 201. Since the thickness of the second pixel defining layer 202 and the third pixel defining layer 203 as an integral structure is increased, it is not easy for the second pixel defining layer 202 and the first pixel defining layer 201 to fall off either, further avoiding the simultaneous detachment of the second pixel defining layer 202 and the third pixel defining layer 203. By using the second pixel defining layer 202 with a larger hydrophobicity as an intermediate layer and as an adhesive layer between the organic layer and the inorganic layer, direct contact between the third pixel defining layer 203 and the first pixel defining layer 201 is avoided, so as to improve the adhesion between the first pixel defining layer 201, the second pixel defining layer 202, and the third pixel defining layer 203, and the detachment of the third pixel defining layer 203 can be avoided. When the display panel is in the dark state, there is no brightening phenomenon on the display panel, and the black effect of the display panel is improved.

[0051] The display panel provided by the embodiment of the present application sets the third pixel defining layer as an organic layer doped with black dye, and sets the light transmittance of the third pixel defining layer to be less than that of the first pixel defining layer, so that the third pixel defining layer has a light-shielding property. The second pixel defining layer with relatively high hydrophobicity is used as an intermediate layer and as an adhesive layer between the organic layer and the inorganic layer. And it is set that the hydrophobicities of the second pixel defining layer and the third pixel defining layer are both greater than that of the first pixel defining layer, so that the adhesion force between the second pixel defining layer and the third pixel defining layer with similar hydrophobicities is higher, avoiding the peeling off of the third pixel defining layer. Regarding the second pixel defining layer and the third pixel defining layer with similar hydrophobicities as an integral structure can increase the film thickness of the pixel defining layer, further increase the adhesion force between the second pixel defining layer and the first pixel defining layer, avoid the peeling off of the third pixel defining layer, improve the adhesion force among the third pixel defining layer, the second pixel defining layer, and the third pixel defining layer, avoid the peeling off of the third pixel defining layer with a light-shielding property, so that in the dark state of the display panel, the display panel will not have the phenomenon of the display panel emitting light due to the peeling off of the pixel defining layer with a light-shielding property, improve the problem of the peeling off of the pixel defining layer with a light-shielding property, and further improve the black effect of the display panel.

[0052] In some embodiments, referring to Figure 1 , the hydrophilicity of the second pixel defining layer 202 is less than that of the first pixel defining layer 201. The hydrophilicity of the third pixel defining layer 203 is less than that of the first pixel defining layer 201. The hydrophobicity of the third pixel defining layer 203 is the same as that of the second pixel defining layer 202. Since the hydrophobicities of the second pixel defining layer 202 and the third pixel defining layer 203 are the same, the adhesion force between the film layers with the same hydrophobicity is relatively high. By setting that the hydrophilicities of the second pixel defining layer 202 and the third pixel defining layer 203 are both less than that of the first pixel defining layer 201, and setting that the hydrophobicity of the third pixel defining layer 203 is the same as that of the second pixel defining layer 202, the adhesion force between the film layers with the same hydrophobicity is relatively high. Regarding the second pixel defining layer 202 and the third pixel defining layer 203 with the same hydrophobicity as an integral structure can increase the film thickness of the pixel defining layer, increase the adhesion force between the second pixel defining layer 202 and the first pixel defining layer 201, further avoid the peeling off of the third pixel defining layer 203, so that in the dark state of the display panel, the display panel does not have the phenomenon of emitting light, and improve the black effect of the display panel.

[0053] In some embodiments, the positive projection of the third pixel defining layer on the substrate layer partially covers the positive projection of the second pixel defining layer on the substrate layer. The positive projection of the second pixel defining layer on the substrate layer at least partially overlaps with the positive projection of the first pixel defining layer on the substrate layer. The positional relationship of the stacked arrangement between the first pixel defining layer, the second pixel defining layer, and the third pixel defining layer can be correspondingly set according to the material of the second pixel defining layer to be applicable to different manufacturing processes.

[0054] Figure 2 FIG. is a schematic partial structural diagram of another display panel provided by an embodiment of the present application. Exemplarily, as Figure 2 shown, the first pixel defining layer 201 may include silicon oxide, silicon nitride, and silicon oxide stacked in sequence. The second pixel defining layer 202 may include indium tin oxide. The third pixel defining layer 203 may include a mixed material film layer formed by polyimide and a black dye. The positive projection of the third pixel defining layer 203 on the substrate layer 100 falls within the positive projections of the first pixel defining layer 201 and the second pixel defining layer 202 on the substrate layer 100. The first pixel defining layer 201 is etched by dry etching, and the second pixel defining layer 202 is etched by wet etching. The second pixel defining layer 202 and the first pixel defining layer 201 are prepared using the same mask plate. The positive projection of the second pixel defining layer 202 on the substrate layer 100 coincides with the positive projection of the first pixel defining layer 201 on the substrate layer.

[0055] Exemplarily, referring to Figure 2 , the first boundary B1 of the positive projection of the first pixel defining layer 201 on the substrate layer 100, the second boundary B2 of the positive projection of the second pixel defining layer 202 on the substrate layer 100, and the third boundary B3 of the positive projection of the third pixel defining layer 203 on the substrate layer 100. The first boundary B1 and the second boundary B2 may be flush. By increasing the contact area between the first pixel defining layer 201 and the second pixel defining layer 202, the adhesion force between the first pixel defining layer 201 and the second pixel defining layer 202 is increased to prevent the second pixel defining layer 202 from peeling off.

[0056] Figure 3 FIG. is a schematic partial structural diagram of yet another display panel provided by an embodiment of the present application. Exemplarily, as Figure 3As shown, the first pixel defining layer 201 may include silicon oxide, silicon nitride, and silicon oxide stacked in sequence. The second pixel defining layer 202 may include polyimide, and the third pixel defining layer 203 may include a mixed material film layer formed by polyimide and a black dye. The first pixel defining layer 201, the second pixel defining layer 202, and the third pixel defining layer 203 are all prepared using different mask plates. The third pixel defining layer 203 covers the second pixel defining layer 202, and the orthographic projection of the third pixel defining layer 203 on the substrate layer 100 completely covers the orthographic projection of the second pixel defining layer 202 on the substrate layer 100. The orthographic projections of the second pixel defining layer 202 and the third pixel defining layer 203 on the substrate layer 100 both fall within the orthographic projection of the first pixel defining layer 201 on the substrate layer 100.

[0057] Exemplarily, referring to Figure 3 , the distance between the first boundary B1 and the third boundary B3 is greater than the distance between the first boundary B1 and the second boundary B2, and the third pixel defining layer 203 covers the second pixel defining layer 202. By increasing the contact area between the second pixel defining layer 202 and the third pixel defining layer 203, the adhesion between the second pixel defining layer 202 and the third pixel defining layer 203 is increased to avoid the third pixel defining layer 203 from falling off.

[0058] Exemplarily, referring to Figures 1 to 3 , the thicknesses of both the first pixel defining layer 201 and the third pixel defining layer 203 are greater than the thickness of the second pixel defining layer 202. The second pixel defining layer 202 is a thin adhesion layer, which ensures the light shielding of the third pixel defining layer 203 while keeping the overall film thickness of the product unchanged and avoiding affecting subsequent processes.

[0059] Exemplarily, the thickness range of the first pixel defining layer 201 is from 1000 nm to 1600 nm, for example, it can be 1200 nm, 1300 nm, 1400 nm, or 1500 nm. The thickness range of the second pixel defining layer 202 is from 1 nm to 3 nm, for example, it can be 1.5 nm, 1.8 nm, 2.5 nm, or 2.8 nm. The thickness range of the third pixel defining layer 203 is from 1000 nm to 1200 nm, for example, it can be 1130 nm, 1150 nm, 1170 nm, or 1190 nm.

[0060] Generally, during the light-emitting process of a display panel, there are a large number of charges in the light-emitting layer. The charges are transported laterally in the light-emitting layer, and it is easy for the display panel to form a lateral current path, resulting in lateral leakage of the display panel and affecting the image quality of the display screen.

[0061] Figure 4 This is a schematic partial structural diagram of another display panel provided by an embodiment of the present application. Exemplarily, as Figure 4As shown, the pixel defining layer is provided with a plurality of pixel openings 101. The pixel openings 101 penetrate through the pixel defining layer 200 in the thickness direction. A light-emitting layer is disposed in the pixel openings. The light-emitting layer includes an ion injection layer, an ion transport layer, a hole injection layer, a hole transport layer, etc. During the light-emitting stage, there are charges in the ion injection layer, ion transport layer, hole injection layer, and hole transport layer in the light-emitting layer, and the charges will be laterally transported, forming leakage current. The side surface of the first pixel defining layer 201 in the thickness direction H includes a groove structure 211, that is, an undercut structure is formed on the side surface of the first pixel defining layer 201 in the thickness direction H. The opening direction of the groove structure 211 is set to face the pixel opening 101. The groove structure 211 can block the transmission path of the charges in the light-emitting layer, and the channels and paths of lateral leakage are blocked to avoid the formation of a lateral current path. By providing the groove structure 211, the lateral leakage of sub-pixels can be improved or eliminated, thereby improving the image quality of light emission and the problem of uneven low gray-scale brightness, and improving the brightness uniformity of the display panel.

[0062] In some examples, referring to Figure 4 , the groove depth of the groove structure 211 in the first direction X is greater than or equal to the thickness of the first pixel defining layer 201, where the first direction X is the direction from the pixel defining layer 200 to the pixel opening 101. The depth of the groove can be greater than 1600 nm. Schematically, it can be 1800 nm, 2000 nm, 2500 nm, or 3000 nm. By setting the depth of the groove structure 211 to be greater than the thickness of the first pixel defining layer, the lap between the pixel defining layer and the anode can be better blocked, the possibility of lateral leakage can be greatly reduced, and the reliability of the product and the image quality of the display panel can be improved.

[0063] In some embodiments, referring to Figure 4 , the first pixel defining layer includes a first sub-layer 212, a second sub-layer 213, and a third sub-layer 214. The second sub-layer 213 is disposed on the side of the first sub-layer 212 away from the substrate layer 100, and the third sub-layer 214 is disposed on the side of the second sub-layer 213 away from the first sub-layer 212. The orthographic projection of the second sub-layer 213 on the substrate layer 100 falls within the orthographic projection of the first sub-layer 212 on the substrate layer 100, and the orthographic projection of the second sub-layer 213 on the substrate layer 100 falls within the orthographic projection of the third sub-layer 214 on the substrate layer 100. The first sub-layer 212, the second sub-layer 213, and the third sub-layer 214 form a groove structure 211 on the side close to the pixel opening 101.

[0064] Exemplarily, referring to Figure 4, the orthographic projection boundary of the first sub-layer 212 on the substrate layer 100 is the fourth boundary B4, the orthographic projection boundary of the second sub-layer 213 on the substrate layer 100 is the fifth boundary B5, and the orthographic projection boundary of the third sub-layer 214 on the substrate layer 100 is the sixth boundary B6. The distance between the fourth boundary B4 and the fifth boundary B5 is greater than the distance between the fourth boundary B4 and the sixth boundary B6, so as to form an undercut structure on the side of the first pixel defining layer, thereby improving or eliminating the lateral leakage of sub-pixels, improving the image quality of light emission, and the problem of uneven low gray-scale brightness, and improving the brightness consistency of the display panel.

[0065] In the display panel provided by the embodiment of the present application, the third pixel defining layer is set as an organic layer doped with a black dye, and the light transmittance of the third pixel defining layer is set to be less than the light transmittance of the first pixel defining layer, so that the third pixel defining layer has a light-shielding property. The second pixel defining layer with a relatively large hydrophobicity is used as an intermediate layer and as an adhesive layer between the organic layer and the inorganic layer. And the hydrophobicity of the second pixel defining layer and the third pixel defining layer are both set to be greater than the hydrophobicity of the first pixel defining layer, so that the adhesion force between the second pixel defining layer and the third pixel defining layer with similar hydrophobicity is higher, avoiding the peeling off of the third pixel defining layer. Taking the second pixel defining layer and the third pixel defining layer with similar hydrophobicity as an integral structure can increase the film thickness of the pixel defining layer, further increase the adhesion force between the second pixel defining layer and the first pixel defining layer, avoid the peeling off of the third pixel defining layer, improve the adhesion force between the third pixel defining layer, the second pixel defining layer and the third pixel defining layer, avoid the peeling off of the third pixel defining layer with a light-shielding property, so that in the dark state of the display panel, the display panel will not have the phenomenon of the display panel emitting light due to the peeling off of the pixel defining layer with a light-shielding property, improve the peeling off problem of the pixel defining layer with a light-shielding property, and further improve the black effect of the display panel.

[0066] Figure 5 It is a schematic partial structure diagram of a display panel provided by an embodiment of the present application. Exemplarily, as Figure 5 shown, when the second pixel defining layer 202 includes a metal oxide, the orthographic projection of the third pixel defining layer 203 on the substrate layer 100 falls within the orthographic projection of the second sub-layer 213 on the substrate layer 100. The orthographic projection of the second pixel defining layer 202 on the substrate layer 100 coincides with the orthographic projection of the third sub-layer 214 on the substrate layer 100.

[0067] Figure 6 It is a schematic partial structure diagram of another display panel provided by an embodiment of the present application. Exemplarily, as Figure 6As shown, when the second pixel defining layer 202 includes an organic material, the orthographic projection of the third pixel defining layer 203 on the substrate layer 100 falls within the orthographic projection of the second sub-layer 213 on the substrate layer 100, and the orthographic projection of the second pixel defining layer 202 on the substrate layer 100 falls within the orthographic projection of the third sub-layer 214 on the substrate layer 100.

[0068] Exemplarily, referring to Figures 4 to 6 , the first pixel defining layer includes a first sub-layer 212, a second sub-layer 213, and a third sub-layer 214. The orthographic projection of the third sub-layer 214 on the substrate layer 100 falls within the orthographic projection of the first sub-layer 212 on the substrate layer 100, and the orthographic projection of the second sub-layer 213 on the substrate layer 100 falls within the orthographic projections of the first sub-layer 212 and the third sub-layer 214 on the substrate layer 100.

[0069] In some embodiments, referring to Figures 4 to 6 , 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. Both the first sub-layer and the third sub-layer may include silicon oxide, and the second sub-layer may include silicon nitride. The thicknesses of the first sub-layer 212 and the third sub-layer 214 are both smaller than the thickness of the second sub-layer 213, and the thickness of the third sub-layer 214 is equal to the thickness of the first sub-layer 212.

[0070] In some embodiments, the materials of the first sub-layer, the second sub-layer, and the third sub-layer are different. The first sub-layer may include a silicon oxide material, the second sub-layer may include a silicon nitride material, the third sub-layer may include a polyimide material, and the second pixel defining layer may include a polyimide material. By setting the third sub-layer and the second pixel defining layer to be of the same material, the adhesion between the second pixel defining layer and the first pixel defining layer is improved. By setting the hydrophobicity of the second pixel defining layer to be equal to the hydrophobicity of the third pixel defining layer, the adhesion between the second pixel defining layer and the third pixel defining layer is improved, preventing the pixel defining layer from peeling off and enhancing the integrity and effect of the display panel.

[0071] In some embodiments, the materials of the first sub-layer, the second sub-layer, and the third sub-layer are different. The first sub-layer may include a silicon oxide material, the second sub-layer may include a silicon nitride material, the third sub-layer may include a polyimide material, and the second pixel defining layer may include an indium tin oxide material. By setting the hydrophilicity of the third sub-layer to be greater than the hydrophilicity of the second pixel defining layer, the adhesion between the second pixel defining layer and the first pixel defining layer is improved. By setting the hydrophobicity of the second pixel defining layer to be equal to the hydrophobicity of the third pixel defining layer, the adhesion between the second pixel defining layer and the third pixel defining layer is improved, preventing the pixel defining layer from peeling off and enhancing the integrity and effect of the display panel.

[0072] The display panel provided by the implementation of this application can accurately determine the film layer preparation process based on the projection relationship between the first sub-layer, the second sub-layer, and the third sub-layer of the first pixel defining layer, the second pixel defining layer, and the third pixel defining layer, etc. of the second pixel defining layer made of different materials, and then accurately control the thickness of the film layer. While avoiding the peeling off of the third pixel defining layer, it improves the integrated black effect of the display panel and the consistency of film layer preparation.

[0073] In some examples, when the orthographic projection of the second pixel defining layer on the substrate layer falls within the orthographic projection of the first pixel defining layer on the substrate layer, the edge slope angle of the second pixel defining layer is smaller than that of the first pixel defining layer. When the orthographic projection of the second pixel defining layer on the substrate layer coincides with the orthographic projection of the first pixel defining layer on the substrate layer, the edge slope angle of the second pixel defining layer is equal to that of the first pixel defining layer. When the orthographic projection of the third pixel defining layer on the substrate layer partially covers the orthographic projection of the second pixel defining layer on the substrate layer, the edge slope angle of the third pixel defining layer is smaller than that of the second pixel defining layer. By setting the pixel defining layer and the film layer slope angle, the amount of large-angle light that the pixel defining layer can block can be accurately controlled to avoid the light-shielding structure from affecting the front-view light and improve the light extraction rate of the display panel.

[0074] Figure 7 It is a schematic flowchart of a method for manufacturing a display panel provided by an embodiment of this application. In some embodiments, as Figure 7 shown, when the second pixel defining layer includes metal oxide, the method for manufacturing the display panel includes:

[0075] S101: Prepare a first insulating layer 102 on the substrate layer 100, prepare an anode 103 on the side of the first insulating layer 102 away from the substrate layer 100, and prepare an inorganic layer 210 on the side of the anode 103 away from the substrate layer 100. Among them, the inorganic layer 210 includes silicon oxide, silicon nitride, and silicon oxide stacked.

[0076] S102: Prepare a metal oxide 215 on the side of the inorganic layer 210 away from the substrate layer. The metal oxide 215 is prepared by an electroless plating process. The metal oxide 215 may include indium tin oxide, and the thickness of the indium tin oxide is 10 to 20 angstroms.

[0077] S103: Prepare a first optical adhesive layer 216 on the side of the metal oxide 215 away from the substrate layer. The orthographic projection of the first optical adhesive layer 216 on the substrate layer 100 overlaps partially with the orthographic projection of the metal oxide 215 on the substrate layer 100.

[0078] S104: Wet-etch the metal oxide 215 to remove the metal oxide not covered by the first photoresist layer 216, so as to obtain the second pixel defining layer 202.

[0079] S105: Dry-etch the inorganic layer to obtain the first pixel defining layer 201. The first pixel defining layer includes a first sub-layer 212, a second sub-layer 213, and a third sub-layer 214. The first sub-layer 212 is silicon oxide, the second sub-layer 213 is silicon nitride, and the third sub-layer 214 is silicon oxide. They are formed by dry-etching silicon oxide, silicon nitride, and silicon oxide respectively due to different etching rates of different materials. An upper groove structure 21 is formed on the side of the first sub-layer 212, the second sub-layer 213, and the third sub-layer 214 close to the pixel opening. Among them, the orthographic projection of the second sub-layer 213 on the substrate layer 100 falls within the orthographic projection of the first sub-layer 212 on the substrate layer 100 and the orthographic projection of the third sub-layer 114 on the substrate layer 10, and the orthographic projection of the first sub-layer 212 on the substrate layer 100 falls within the orthographic projection of the third sub-layer 214 on the substrate layer.

[0080] S106: Prepare a first organic layer 217 on the side of the second pixel defining layer away from the substrate layer. The orthographic projection of the first organic layer 217 on the substrate layer 100 completely covers the orthographic projection of the anode 103 layer on the substrate layer 100. The first organic layer 217 can be a mixed material film layer formed by polyimide and a black dye.

[0081] S107: Pattern the first organic layer 217 by dry-etching to obtain the third pixel defining layer 203. The orthographic projection of the third pixel defining layer 203 on the substrate layer 100 falls within the orthographic projections of the first pixel defining layer 201 and the second pixel defining layer 202 on the substrate layer, and the orthographic projection of the second pixel defining layer 202 on the substrate layer 100 coincides with the first part of the first pixel defining layer 201.

[0082] Exemplarily, the orthographic projection of the third pixel defining layer 203 on the substrate layer 100 falls within the orthographic projections of the second sub-layer 213 and the third sub-layer 214 on the substrate layer 100, and the orthographic projection of the second pixel defining layer 202 on the substrate layer 100 coincides with the orthographic projection of the third sub-layer 214 on the substrate layer 100.

[0083] Figure 8 It is a schematic flowchart of another method for manufacturing a display panel provided by an embodiment of the present application. In some embodiments, as Figure 8 shown, when the second pixel defining layer includes an organic substance, the method for manufacturing a display panel includes:

[0084] S110: Prepare a first insulating layer 102 on a substrate layer, prepare an anode 103 on a side of the first insulating layer 102 away from the substrate layer 100, and prepare an inorganic layer 210 on a side of the anode 103 away from the substrate layer 100. Among them, the inorganic layer 210 includes silicon oxide, silicon nitride, and silicon oxide stacked.

[0085] S120: Prepare a second optical glue layer 218 on a side of the inorganic layer 210 away from the substrate layer. A positive projection of the second optical glue layer 218 on the substrate layer 100 overlaps with a positive projection of the inorganic layer 210 on the substrate layer 100.

[0086] S130: Etch the inorganic layer 210 to obtain a first pixel defining layer 201. Among them, the first pixel defining layer 201 includes a first sub-layer 212, a second sub-layer 213, and a third sub-layer 214. The first sub-layer 212 is silicon oxide, the second sub-layer 213 is silicon nitride, and the third sub-layer 214 is silicon oxide. Due to different etching rates of different materials, dry etching is performed on silicon oxide, silicon nitride, and silicon oxide respectively to form the first sub-layer 212, the second sub-layer 213, and the third sub-layer 214. An upper groove structure 211 is formed on a side close to a pixel opening. Among them, a positive projection of the second sub-layer 213 on the substrate layer 100 falls within a positive projection of the first sub-layer 212 on the substrate layer 100 and a positive projection of the third sub-layer 214 on the substrate layer 100, and a positive projection of the first sub-layer 212 on the substrate layer 100 falls within a positive projection of the third sub-layer 214 on the substrate layer 100.

[0087] In some examples, after the groove structure 211 is formed, the second optical glue layer 218 on the surface is removed.

[0088] S140: Prepare polyimide 219 on a side of the first pixel defining layer 201 away from the substrate layer 100. The thickness of the polyimide is 1 nm to 3 nm.

[0089] S150: Perform dry etching on the polyimide to obtain a second pixel defining layer 202.

[0090] S160: Prepare a second organic layer 220 on a side of the second pixel defining layer 202 away from the substrate layer. The second organic layer 220 can be a mixed material film layer formed by polyimide and a black dye.

[0091] S170: Dry-etch the second organic layer 220 to obtain the third pixel defining layer 203. The orthographic projection of the third pixel defining layer 203 on the substrate layer 100 completely covers the orthographic projection of the second pixel defining layer 202 on the substrate layer 100, and the orthographic projections of the second pixel defining layer 202 and the third pixel defining layer 203 on the substrate layer 100 both fall within the orthographic projection of the first pixel defining layer 201 on the substrate layer 100. The orthographic projections of the second pixel defining layer 202 and the third pixel defining layer 203 on the substrate layer 100 both fall within the orthographic projections of the first sub-layer 212, the second sub-layer 213, and the third sub-layer 214 on the substrate layer 100.

[0092] It should be noted that whether the second pixel defining layer is indium tin oxide or polyimide, the hydrophobicity of the second pixel defining layer is greater than that of the first pixel defining layer, and the transmittance of the third pixel defining layer is less than the transmittances of the first pixel defining layer and the second pixel defining layer. By providing a second pixel defining layer with relatively high hydrophobicity between the silicon oxide material film layer and the hybrid material film layer formed by polyimide and black dye, and setting the hydrophobicities of the second pixel defining layer and the third pixel defining layer to be greater than that of the first pixel defining layer, the second pixel defining layer with relatively high hydrophobicity is used as the adhesive layer between the organic film layer and the inorganic film layer to improve the adhesion of the third pixel defining layer, avoid the peeling off of the third pixel defining layer with light-shielding performance, ensure that there is no light-emitting phenomenon in the display panel in the dark state, and improve the black effect of the display panel.

[0093] In some embodiments, the minimum thickness that can be controlled within the equipment process capability range of the coating of the second pixel defining layer can be controlled to 1 micron. Then, through a mask plate for etching, a patterned second pixel defining layer is obtained. Due to the setting of the second pixel defining layer, the third pixel defining layer can be appropriately thinned on the premise that the light transmittance of the third pixel defining layer is less than 10%.

[0094] In the second aspect of the embodiments of the present application, a display device is provided. Figure 9 It is a schematic structural diagram of a display device provided by the embodiments of the present application. Exemplarily, as Figure 9 shown, the display device 2000 includes a display panel 1000.

[0095] The display device provided by the embodiment of the present application sets the third pixel defining layer as an organic layer doped with black dye, and sets the light transmittance of the third pixel defining layer to be less than that of the first pixel defining layer, so that the third pixel defining layer has a light-shielding property. The second pixel defining layer with a relatively large hydrophobicity is used as an intermediate layer and as an adhesive layer between the organic layer and the inorganic layer. And it is set that the hydrophobicities of the second pixel defining layer and the third pixel defining layer are both greater than that of the first pixel defining layer, so that the adhesion force between the second pixel defining layer and the third pixel defining layer with similar hydrophobicities is higher, avoiding the peeling off of the third pixel defining layer. Regarding the second pixel defining layer and the third pixel defining layer with similar hydrophobicities as an integral structure can thicken the film thickness of the pixel defining layer, further increasing the adhesion force between the second pixel defining layer and the first pixel defining layer, avoiding the peeling off of the third pixel defining layer, improving the adhesion force between the third pixel defining layer, the second pixel defining layer and the third pixel defining layer, avoiding the peeling off of the third pixel defining layer with a light-shielding property, so that when the display panel is in the dark state, the display panel will not have the phenomenon of the display panel emitting light due to the peeling off of the pixel defining layer with a light-shielding property, improving the problem of the peeling off of the pixel defining layer with a light-shielding property, and further improving the black display effect of the display panel.

[0096] The display device provided by the embodiment of the present application may include a television, a computer, a smart phone, a smart wearable device, a laptop computer, a tablet computer, etc. The smart wearable device may include a smart watch, an AR (augmented reality) device, a VR (virtual reality) device, etc.

[0097] It should be noted that in the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0098] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; 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 each embodiment of the present application.

[0099] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of this specification.

[0100] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that, Comprising: A substrate layer; A pixel defining layer disposed on one side of the substrate layer. The pixel defining layer includes a first pixel defining layer, a second pixel defining layer, and a third pixel defining layer. The second pixel defining layer is disposed on the side of the first pixel defining layer away from the substrate layer, and the third pixel defining layer is disposed on the side of the second pixel defining layer away from the first pixel defining layer; The second pixel defining layer has a greater hydrophobicity than the first pixel defining layer, and the third pixel defining layer has a greater hydrophobicity than the first pixel defining layer; The light transmittance of the third pixel defining layer is less than that of the first pixel defining layer.

2. The display panel according to claim 1, wherein The hydrophilicity of the second pixel defining layer is less than that of the first pixel defining layer, and the hydrophilicity of the third pixel defining layer is less than that of the first pixel defining layer; and / or, The hydrophobicity of the third pixel defining layer is the same as that of the second pixel defining layer.

3. The display panel according to claim 1, wherein The orthographic projection of the third pixel defining layer on the substrate layer partially covers the orthographic projection of the second pixel defining layer on the substrate layer; The orthographic projection of the second pixel defining layer on the substrate layer at least partially coincides with the orthographic projection of the first pixel defining layer on the substrate layer.

4. The display panel according to any one of claims 1 to 3, wherein The pixel defining layer is provided with a plurality of pixel openings, and the pixel openings penetrate the pixel defining layer in the thickness direction; The side surface of the first pixel defining layer in the thickness direction includes a groove structure, and the opening direction of the groove structure faces the pixel opening.

5. The display panel according to claim 4, wherein The groove depth of the groove structure in the first direction is greater than or equal to the thickness of the first pixel defining layer, wherein the first direction is the direction from the pixel defining layer to the pixel opening.

6. The display panel according to claim 4, wherein The first pixel defining layer includes a first sub-layer, a second sub-layer, and a third sub-layer. The second sub-layer is disposed on the side of the first sub-layer away from the substrate layer, and the third sub-layer is disposed on the side of the second sub-layer away from the first sub-layer; The orthographic projection of the second sub-layer on the substrate layer falls within the orthographic projection of the first sub-layer on the substrate layer, and the orthographic projection of the second sub-layer on the substrate layer falls within the orthographic projection of the third sub-layer on the substrate layer.

7. The display panel according to claim 6, wherein The orthographic projection of the third pixel defining layer on the substrate layer falls within the orthographic projection of the second sub-layer on the substrate layer; and / or, The orthographic projection of the second pixel defining layer on the substrate layer coincides with the orthographic projection of the third sub-layer on the substrate layer; Or, The orthographic projection of the second pixel defining layer on the substrate layer falls within the orthographic projection of the third sub-layer on the substrate layer.

8. The display panel according to claim 7, wherein The positive projection of the third sub-layer on the substrate layer falls within the positive projection of the first sub-layer on the substrate layer.

9. The display panel according to claim 6, wherein the thicknesses of both the first pixel definition layer and the third pixel definition layer are greater than the thickness of the second pixel definition layer; and / or, the thicknesses of both the first sub-layer and the third sub-layer are less than the thickness of the second sub-layer; and / or, the thickness of the third sub-layer is equal to the thickness of the first sub-layer.

10. The display panel according to claim 9, 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; or, the materials of the first sub-layer, the second sub-layer, and the third sub-layer are different; and / or, the second pixel definition layer includes metal oxide.

11. The display panel according to claim 1, wherein the edge slope angle of the second pixel definition layer is less than or equal to the edge slope angle of the first pixel definition layer; and / or, the edge slope angle of the third pixel definition layer is less than the edge slope angle of the second pixel definition layer.

12. The display panel according to claim 1, wherein the thickness range of the first pixel definition layer is from 1000 nm to 1600 nm; and / or, the thickness range of the second pixel definition layer is from 1 nm to 3 nm; and / or, the thickness range of the third pixel definition layer is from 1000 nm to 1200 nm.

13. A display device a display panel according to any one of claims 1 to 12.

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