Display panel and display device

Abstract

The utility model provides a display panel and a display device. According to the display panel, the conductive hydrophobic layer is arranged, so that the conductive hydrophobic layer is in direct contact with the pixel definition layer and the common electrode layer, the water drop angle of the conductive hydrophobic layer is larger than that of the pixel definition layer, and the impedance of the conductive hydrophobic layer is smaller than that of the pixel definition layer; the contact surface of the pixel definition layer and the conductive hydrophobic layer is a continuous surface, so that the impedance of the common electrode layer can be reduced through the contact of the conductive hydrophobic layer and the common electrode layer, the voltage drop of a signal transmitted by the common electrode layer is reduced, and the water drop angle of the conductive hydrophobic layer is larger than that of the pixel definition layer. The conductive hydrophobic layer is arranged on the pixel definition layer, so that the hydrophobicity of the conductive hydrophobic layer is larger than that of the pixel definition layer, ink can be limited in the sub-pixel openings through the conductive hydrophobic layer, crosstalk between the sub-pixels caused by slippage of the ink between the adjacent sub-pixels is avoided, and the effects of reducing impedance of the common electrode layer and preventing crosstalk between the sub-pixels are taken into consideration.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display panel and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays are widely used in various fields due to their lightweight, wide viewing angle, fast response, low-temperature resistance, high luminous efficiency, and ability to be fabricated into flexible displays. Top-emitting OLED displays have advantages over bottom-emitting OLED displays because they do not affect circuit design, have lower operating voltage at the same brightness, longer device lifespan, and lower power consumption. It's understandable that the light emitted by top-emitting OLED displays needs to pass through the cathode. Therefore, a transparent material is used to form the cathode, and the cathode thickness is reduced. However, this results in higher cathode resistance. When the cathode voltage is input through the edge, the voltage drop causes the voltage at the center of the display panel to be lower than that at the edge, resulting in lower pixel brightness at the center and a brightness difference between the center and edge of the display panel, leading to uneven display.

[0003] Therefore, existing OLED display devices suffer from a technical problem of uneven display due to the high impedance of the cathode. Utility Model Content

[0004] This utility model provides a display panel and a display device to solve the technical problem of uneven display caused by the high impedance of the cathode in existing OLED display devices.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a display panel is provided, the display panel comprising:

[0006] Substrate;

[0007] A pixel electrode layer is disposed on one side of the substrate;

[0008] A pixel definition layer is disposed on the side of the pixel electrode layer away from the substrate;

[0009] A conductive hydrophobic layer is disposed on the side of the pixel definition layer away from the pixel electrode layer;

[0010] A common electrode layer is disposed on the side of the conductive hydrophobic layer away from the pixel definition layer;

[0011] The conductive hydrophobic layer is in direct contact with the pixel definition layer and the common electrode layer. The water droplet angle of the conductive hydrophobic layer is greater than that of the pixel definition layer, and the impedance of the conductive hydrophobic layer is less than that of the pixel definition layer. The surface in contact between the pixel definition layer and the conductive hydrophobic layer is a continuous surface.

[0012] Optionally, the pixel definition layer includes a pixel definition portion and a first opening located within the pixel definition portion, and the conductive hydrophobic layer includes a conductive hydrophobic portion and a second opening located within the conductive hydrophobic portion, wherein the conductive hydrophobic portion is disposed corresponding to the pixel definition portion, and the second opening is disposed corresponding to the first opening.

[0013] Optionally, the display panel includes a display area, in the middle region of the display area, the conductive hydrophobic portion is located on the pixel definition portion, and there is a gap between the conductive hydrophobic portion and the edge of the pixel definition portion, and the width of the first opening is smaller than the width of the second opening.

[0014] Optionally, the display panel includes a display area, and in the edge region of the display area, the conductive hydrophobic portion extends to the sidewall of the pixel definition portion, and the conductive hydrophobic portion is located outside the first opening.

[0015] Optionally, the display panel includes a display area, and in the edge region of the display area, the conductive hydrophobic portion is located on the pixel definition portion, and there is a gap between the conductive hydrophobic portion and the edge of the pixel definition portion.

[0016] Optionally, the display panel includes a display area, wherein the area of ​​a second opening in the middle region of the display area is larger than the area of ​​a second opening in the edge region of the display area.

[0017] Optionally, the thickness of the conductive hydrophobic layer is greater than the thickness of the pixel definition layer.

[0018] Optionally, the pixel definition layer includes a plurality of pixel definition parts arranged in an array, the plurality of pixel definition parts being spaced apart along a first direction, and the conductive hydrophobic layer includes a plurality of conductive hydrophobic parts arranged in an array, the plurality of conductive hydrophobic parts being spaced apart along a second direction, wherein the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

[0019] Optionally, the surface roughness of the conductive hydrophobic layer is greater than the surface roughness of the pixel definition layer; or the surface of the conductive hydrophobic layer is provided with microstructures.

[0020] According to a second aspect of the present invention, a display device is provided, the display device comprising a display panel as described in any of the above embodiments.

[0021] This utility model provides a display panel and a display device. The display panel has a conductive hydrophobic layer that is in direct contact with the pixel definition layer and the common electrode layer. The water droplet angle of the conductive hydrophobic layer is larger than that of the pixel definition layer, and the impedance of the conductive hydrophobic layer is smaller than that of the pixel definition layer. The surface in contact with the pixel definition layer and the conductive hydrophobic layer is a continuous surface. This reduces the impedance of the common electrode layer and the voltage drop of the signal transmitted by the common electrode layer. The larger water droplet angle of the conductive hydrophobic layer compared to the pixel definition layer makes the hydrophobicity of the conductive hydrophobic layer greater than that of the pixel definition layer. The conductive hydrophobic layer can confine the ink within the opening of each sub-pixel, preventing ink from sliding between adjacent sub-pixels and causing crosstalk between sub-pixels. This achieves both the effect of reducing the impedance of the common electrode layer and preventing crosstalk between sub-pixels.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] To gain a more complete understanding of this utility model and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0025] Figure 1 A schematic diagram of the structure of the comparative display device and a planar schematic diagram of its cathode provided for embodiments of this utility model.

[0026] Figure 2 The diagram shows the structure of the contrast display device corresponding to each step of the preparation method of the contrast display device provided in the embodiment of this utility model.

[0027] Figure 3 A plan view of the display panel provided in an embodiment of this utility model.

[0028] Figure 4 for Figure 3 A schematic diagram of the first type of A1-A2 cross section of the display panel.

[0029] Figure 5 This is a planar schematic diagram of the pixel definition layer, conductive hydrophobic layer, and common electrode layer in a display panel provided in an embodiment of the present invention.

[0030] Figure 6 for Figure 3 The second type of A1-A2 cross-sectional schematic diagram of the display panel.

[0031] Figure 7 for Figure 3 The third type of cross-sectional diagram of the display panel in the diagram is shown in section A1-A2.

[0032] Figure 8 This is a schematic diagram of the stacked pixel definition layer and conductive hydrophobic layer in a display panel provided in an embodiment of the present invention.

[0033] Figure 9 The diagram shows the structure of the display panel corresponding to each step of the manufacturing method of the display panel provided in the embodiment of this utility model. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0035] To illustrate the principle behind the technical problems in the embodiments of this utility model, some comparative display devices are provided. It should be understood that these comparative display devices are not considered prior art in the embodiments of this utility model. Figure 1 , Figure 2 As shown, Figure 1 (a) in the figure is a film layer diagram of the comparative display device provided in the embodiment of this utility model. Figure 1 (b) in the middle is Figure 1 Plan view of the cathode in (a) of the image. Figure 2 The diagram shows the structure of the contrast display device corresponding to each step of the preparation method of the contrast display device provided in the embodiment of this utility model.

[0036] like Figure 1 As shown in (a), the contrast display device includes a substrate 111, an array film 112, a planarization film 113, an anode 114, a pixel definition film 115, a light-emitting film 116, a cathode 117, a support barrier 118, and a glass cover plate 119. The fabrication method of this contrast display device is as follows: a substrate is provided, and an array film, a planarization film, a pixel definition film, and a light-emitting film are sequentially formed on the substrate. The structure of the contrast display device corresponding to this step is shown in Figure [Figure number missing]. Figure 2 As shown in (a), a cathode, a supporting barrier, and a glass cover are formed on the light-emitting film. The structure of the contrast display device corresponding to this step is as follows: Figure 2 As shown in (b) of the diagram.

[0037] like Figure 1 As shown in (b), the cathode 117 is arranged across the entire surface. When the contrast display device is operating, signals are input to the cathode 117 through the edge region. To improve the transmittance of the cathode, a transparent material is used to form the cathode, and the thickness of the cathode 117 is reduced. However, this results in a higher cathode resistance. When the cathode voltage is input to the cathode 117 through the edge region, due to the voltage drop, the voltage in the center region of the contrast display device is lower than that in the edge region. This causes a difference in brightness between the center and edge positions of the contrast display device, resulting in uneven display. Figure 1 As shown in (a), the different numbers of dashed lines corresponding to the emitted ray 121 indicate the different brightness levels at the center and edge positions. Furthermore, to improve material utilization and reduce costs, existing OLED display devices employ inkjet printing (IJP) technology to form some film layers. To prevent crosstalk between adjacent sub-pixels, the pixel definition film has a certain degree of hydrophobicity. For example... Figure 1 As shown in (a), the pixel definition film 115 is hydrophobic to prevent ink from flowing between adjacent sub-pixels during printing, which would cause crosstalk between adjacent sub-pixels. However, if the pixel definition film is completely hydrophobic, the film formation effect of each film layer may be poor.

[0038] To address the aforementioned issues, some contrast display devices incorporate auxiliary electrodes to reduce cathode impedance, while others combine hydrophilic and hydrophobic pixel definition films to improve film formation and prevent sub-pixel crosstalk. However, this results in a larger film thickness, and removing the hydrophobic pixel definition film may lead to crosstalk between adjacent sub-pixels. In other words, existing contrast display devices inevitably suffer from at least one of the following problems: high cathode impedance, poor film formation, crosstalk between adjacent sub-pixels, or significant thickness. Therefore, existing OLED display devices suffer from the technical problem of high cathode impedance leading to uneven display.

[0039] To address the aforementioned technical problems, this utility model provides a display panel and a display device to solve these problems.

[0040] Figure 3 A plan view of the display panel provided in an embodiment of this utility model. Figure 4 for Figure 3 A schematic diagram of the first type of A1-A2 cross section of the display panel. Figure 5 This is a planar schematic diagram of the pixel definition layer, conductive hydrophobic layer, and common electrode layer in a display panel provided in an embodiment of the present invention. Figure 6 for Figure 3 The second type of A1-A2 cross-sectional schematic diagram of the display panel. Figure 7 for Figure 3 The third type of cross-sectional diagram of the display panel in the diagram is shown in section A1-A2. Figure 8 This is a schematic diagram of the stacked pixel definition layer and conductive hydrophobic layer in a display panel provided in an embodiment of the present invention. Figure 9 The diagram shows the structure of the display panel corresponding to each step of the manufacturing method of the display panel provided in the embodiment of this utility model.

[0041] like Figures 3 to 8 As shown, this utility model embodiment provides a display panel 2, which includes a substrate 211, a pixel electrode layer 214, a pixel definition layer 215, a conductive hydrophobic layer 216, and a common electrode layer 218. The pixel electrode layer 214 is disposed on one side of the substrate 211, the pixel definition layer 215 is disposed on the side of the pixel electrode layer 214 away from the substrate 211, the conductive hydrophobic layer 216 is disposed on the side of the pixel definition layer 215 away from the pixel electrode layer 214, and the common electrode layer 218 is disposed on the side of the conductive hydrophobic layer 216 away from the pixel definition layer 215.

[0042] The conductive hydrophobic layer 216 is in direct contact with the pixel definition layer 215 and the common electrode layer 218. The water droplet angle of the conductive hydrophobic layer 216 is greater than that of the pixel definition layer 215. The impedance of the conductive hydrophobic layer 216 is less than that of the pixel definition layer 215. The surface in contact between the pixel definition layer 215 and the conductive hydrophobic layer 216 is a continuous surface.

[0043] This utility model embodiment provides a display panel. The display panel incorporates a conductive hydrophobic layer that directly contacts both the pixel definition layer and the common electrode layer. The water droplet angle of the conductive hydrophobic layer is greater than that of the pixel definition layer, and the impedance of the conductive hydrophobic layer is less than that of the pixel definition layer. Since the contact surfaces between the pixel definition layer and the conductive hydrophobic layer are continuous, the contact between the conductive hydrophobic layer and the common electrode layer reduces the impedance of the common electrode layer, thereby reducing the voltage drop of the signal transmitted through the common electrode layer. Furthermore, the greater water droplet angle of the conductive hydrophobic layer compared to the pixel definition layer results in greater hydrophobicity. This allows the conductive hydrophobic layer to confine ink within the openings of each sub-pixel, preventing ink slippage between adjacent sub-pixels and thus avoiding crosstalk between sub-pixels. This achieves both the reduction of the impedance of the common electrode layer and the prevention of crosstalk between sub-pixels.

[0044] Specifically, the continuous surface between the pixel definition layer and the conductive hydrophobic layer means that no vias are formed at the contact point between the pixel definition layer and the conductive hydrophobic layer. The contact surface is the surface of both layers, and neither the pixel definition layer nor the conductive hydrophobic layer is embedded inside the other. However, it is understandable that during the film fabrication process, the height of different areas of a single film layer may be inconsistent due to the patterning of other film layers. For example, because the pixel electrode layer is patterned, the height of different parts of the pixel definition layer on the pixel electrode layer may be inconsistent, resulting in a groove on the upper surface of the pixel definition layer. However, since no vias are formed in the pixel definition layer, the conductive hydrophobic layer will be embedded in this groove, but it still does not penetrate the surface of the pixel definition layer to embed itself into it. The contact surface between the two is still their surfaces, namely the lower surface of the conductive hydrophobic layer and the upper surface of the pixel definition layer.

[0045] It is understandable that when the conductive hydrophobic layer extends to the sidewall of the pixel definition layer in the edge region, the conductive hydrophobic layer is located outside the edge of the pixel definition layer. The area outside the edge of the pixel definition layer does not belong to the pixel definition layer, and it cannot be assumed that the pixel definition layer has a hole at this point. Therefore, it still conforms to the principle that the surface in contact between the pixel definition layer and the conductive hydrophobic layer is a continuous surface.

[0046] Specifically, compared to current display devices that require separate hydrophobic pixel definition films and auxiliary electrodes to prevent crosstalk between adjacent sub-pixels and excessive cathode impedance, this embodiment of the invention sets up a pixel definition layer and a conductive hydrophobic layer. This allows the conductive hydrophobic layer to function as both a hydrophobic pixel definition film and an auxiliary electrode, thereby solving the problems of poor film formation, crosstalk between adjacent sub-pixels, and high cathode impedance in the display panel, while reducing the thickness of the display panel.

[0047] Specifically, it can be understood that hydrophobicity and hydrophilicity are relative. The droplet angle of the conductive hydrophobic layer is larger than that of the pixel definition layer, making the hydrophobicity of the conductive hydrophobic layer greater than that of the pixel definition layer. The pixel definition layer has a certain degree of hydrophilicity, which results in a better film formation effect when ink is deposited. The conductive hydrophobic layer has a certain degree of hydrophobicity, which confines the ink within the opening of the conductive hydrophobic layer, preventing the ink from sliding between adjacent sub-pixels and causing crosstalk between adjacent sub-pixels.

[0048] In some embodiments, as Figures 5 to 7As shown, the pixel definition layer 215 includes a pixel definition portion 215a and a first opening 215b located within the pixel definition portion 215a. The conductive hydrophobic layer 216 includes a conductive hydrophobic portion 216a and a second opening 216b located within the conductive hydrophobic portion 216a. The conductive hydrophobic portion 216a is correspondingly disposed to the pixel definition portion 215a, and the second opening 216b is correspondingly disposed to the first opening 215b. By making the conductive hydrophobic portion corresponding to the pixel definition portion, the area where the conductive hydrophobic portion is disposed is a non-transparent area, thereby avoiding the conductive hydrophobic layer occupying the space of the transparent area and avoiding a reduction in the aperture ratio.

[0049] Specifically, such as Figure 5 As shown in (a), the pixel definition layer 215 is arranged on the entire surface. The pixel definition layer 215 has multiple first openings 215b. Each pixel definition part 215a is arranged around the first opening 215b and connected together. A light-emitting material layer can be set in the first opening to separate each sub-pixel from each other and avoid crosstalk between adjacent sub-pixels.

[0050] Specifically, such as Figure 5 As shown in (b), the conductive hydrophobic layer 216 is provided on the entire surface. Multiple second openings 216b are provided on the conductive hydrophobic layer 216. Each conductive hydrophobic part 216a is arranged around the second opening 216b and connected together. A light-emitting material layer can be provided in the second opening. Crosstalk between adjacent sub-pixels is prevented by the hydrophobicity of the conductive hydrophobic layer.

[0051] Specifically, such as Figure 5 As shown in (c), the common electrode layer 218 is arranged on the entire surface. The common electrode layer 218 is in contact with the part of the conductive hydrophobic layer that does not have a second opening 216b, thereby reducing the impedance of the common electrode layer 218 and improving the display uniformity.

[0052] In some embodiments, as Figure 3 , Figure 6 As shown, the display panel 2 includes a display area 201. In the central region 301 of the display area 201, the conductive hydrophobic portion 216a is located on the pixel definition portion 215a, and there is a gap between the conductive hydrophobic portion 216a and the edge of the pixel definition portion 215a. The width L1 of the first opening 215b is smaller than the width L2 of the second opening 216b. By creating a gap between the conductive hydrophobic portion and the edge of the pixel definition portion in the central region of the display panel, and by making the width of the first opening smaller than the width of the second opening, the conductive hydrophobic portion will not extend into the opening of the pixel definition layer, thus preventing the conductive hydrophobic portion from directly connecting the pixel electrode layer and the common electrode layer, and preventing leakage between the pixel electrode layer and the common electrode layer.

[0053] Specifically, it is understandable that because each film layer will form a certain slope during the patterning process, the width of each part will vary to some extent. Figure 6 The width of the first opening is taken as the width of the lower side of the first opening, and the width of the second opening is taken as the width of the lower side of the second opening. However, the embodiments of this utility model are not limited to this. For example, the width of the upper side of the first opening can be taken as the width of the first opening, or the width of the center line of the first opening can be taken as the width of the first opening. Similarly, the width of the upper side of the second opening can be taken as the width of the second opening, and the width of the center line of the second opening can be taken as the width of the second opening, so that the reference of the width of each structure is consistent.

[0054] Specifically, such as Figure 6 As shown, the width of the upper side of the first opening is smaller than the width of the lower side of the second opening, which causes the conductive hydrophobic part to be recessed relative to the pixel definition part, thereby preventing the conductive hydrophobic part from extending into the first opening and causing direct connection between the common electrode layer and the pixel electrode layer, resulting in leakage problems.

[0055] Specifically, such as Figure 4 As shown, the width of the upper side of the first opening can be equal to the width of the lower side of the second opening, so that the conductive hydrophobic part is flush with the pixel definition part.

[0056] In some embodiments, as Figure 3 , Figure 7 As shown, the display panel 2 includes a display area 201. In the edge region 302 of the display area 201, the conductive hydrophobic portion 216a extends to the sidewall of the pixel definition portion 215a, and the conductive hydrophobic portion 216a is located outside the first opening 215b. By extending the conductive hydrophobic layer to the sidewall of the pixel definition portion at the edge region of the display area, the conductive hydrophobic layer can block water and oxygen, preventing water and oxygen from intruding into the pixel definition layer and from the pixel definition layer into the light-emitting material, thus improving the water and oxygen barrier capability. Furthermore, since the conductive hydrophobic layer is located outside the first opening, it can prevent the conductive hydrophobic layer from directly conducting between the pixel electrode layer and the common electrode layer, preventing leakage between the pixel electrode layer and the common electrode layer.

[0057] In some embodiments, as Figure 3 , Figure 6As shown, the display panel 2 includes a display area 201. In the edge region 302 of the display area 201, the conductive hydrophobic portion 216a is located on the pixel definition portion 215a, and there is a gap between the conductive hydrophobic portion 216a and the edge of the pixel definition portion 215a. By maintaining a gap between the conductive hydrophobic portion and the edge of the pixel definition portion in the edge region of the display panel, the conductive hydrophobic portion will not extend into the opening of the pixel definition layer, preventing the conductive hydrophobic portion from directly connecting the pixel electrode layer and the common electrode layer, thus preventing leakage between the pixel electrode layer and the common electrode layer.

[0058] Specifically, the above embodiments use the structure of the conductive hydrophobic part and the pixel definition part as follows: Figure 4 , Figure 6 , Figure 7 The structure shown is illustrated as an example, but the embodiments of this utility model are not limited to this. When there is no conflict between the structures in each embodiment, the structures in each embodiment can be combined with each other. For example, in some embodiments, in the edge region of the display area, the relative positions of the conductive hydrophobic part and the pixel defining part can be as follows: Figure 4 As shown, in the middle region of the display area, the relative positions of the conductive hydrophobic portion and the pixel definition portion can be as follows: Figure 6 As shown, or in the middle region of the display area, the relative positions of the conductive hydrophobic portion and the pixel definition portion can be as follows: Figure 4 As shown, in the edge region of the display area, the relative positions of the conductive hydrophobic portion and the pixel definition portion can be as follows: Figure 7 As shown, it will not be elaborated further here.

[0059] Specifically, the above embodiment is illustrated by taking the conductive hydrophobic part as being disposed outside the first opening as an example. However, the embodiment of this utility model is not limited to this. Due to certain process errors during preparation, a part of the conductive hydrophobic part may be disposed inside the first opening, but it is sufficient to ensure that the pixel electrode layer and the common electrode layer are not directly connected.

[0060] In some embodiments, the impedance of the conductive hydrophobic portion located at the edge of the display area is less than the impedance of the conductive hydrophobic portion located in the middle of the display area. By making the impedance of the conductive hydrophobic portion located at the edge of the display area less than the impedance of the conductive hydrophobic portion located in the middle of the display area, the impedance of the edge portion of the common electrode layer is less than the impedance of the middle portion of the common electrode layer, thereby making the voltage drop of the common electrode layer decrease more gradually and further improving display uniformity.

[0061] The above embodiment is illustrated by taking the example that the impedance of the conductive hydrophobic part located at the edge of the display area is less than the impedance of the conductive hydrophobic part located in the middle of the display area. However, the present invention is not limited to this, and the impedance of the conductive hydrophobic part in the middle of the display area can be greater than or equal to the impedance of the conductive hydrophobic part in the middle of the display area.

[0062] In some embodiments, the display panel 2 includes a display area 201, and the area of ​​the second opening 216b in the middle region 301 of the display area 201 is larger than the area of ​​the second opening 216b in the edge region 302 of the display area 201. By making the area of ​​the second opening in the middle region of the display area larger than the area of ​​the second opening in the edge region of the display area, the impedance of the conductive hydrophobic portion in the edge region of the display area is smaller than the impedance of the conductive hydrophobic portion in the middle region of the display area. This further reduces the impedance of the edge portion of the common electrode layer, resulting in a smaller difference in electrical signals between the middle and edge portions of the common electrode layer during signal transmission, thus improving display uniformity.

[0063] Specifically, the above embodiment is illustrated by taking the example that the area of ​​the second opening in the middle region of the display area is greater than the area of ​​the second opening in the edge region of the display area. However, the present invention is not limited to this, and the area of ​​the second opening in the middle region of the display area can be less than or equal to the area of ​​the second opening in the edge region of the display area.

[0064] In some embodiments, the thickness of the conductive hydrophobic layer 216 is greater than the thickness of the pixel definition layer 215. By making the conductive hydrophobic layer thicker, it can hold more ink, preventing ink from crossing the conductive hydrophobic layer and causing crosstalk between adjacent sub-pixels, thereby improving the yield of the display panel.

[0065] The above embodiments are illustrated using the example that the thickness of the conductive hydrophobic layer is greater than the thickness of the pixel definition layer. However, the embodiments of this utility model are not limited to this, and the thickness of the conductive hydrophobic layer can be less than or equal to the thickness of the pixel definition layer.

[0066] In some embodiments, as Figure 8 As shown, the pixel definition layer 215 includes a plurality of pixel definition portions 215a arranged in an array, and the plurality of pixel definition portions 215a are spaced apart along a first direction Y. The conductive hydrophobic layer 216 includes a plurality of conductive hydrophobic portions 216a arranged in an array, and the plurality of conductive hydrophobic portions 216a are spaced apart along a second direction X. The angle between the first direction Y and the second direction X is greater than 0 and less than or equal to 90 degrees. By arranging the plurality of pixel definition portions spaced apart along the first direction and the plurality of conductive hydrophobic portions spaced apart along the second direction, a column of light-emitting sub-pixels of the same color can be connected together when forming the light-emitting material layer by inkjet printing. The inkjet printing rate is faster, the preparation efficiency is faster, and it can prevent the ink droplet volume from being too large or too small due to the instability of the printhead nozzle, avoiding uneven display and avoiding problems such as low nozzle utilization and low printing efficiency.

[0067] In some embodiments, the surface roughness of the conductive hydrophobic layer 216 is greater than the surface roughness of the pixel definition layer 215; or the surface of the conductive hydrophobic layer 216 is provided with microstructures. By making the surface roughness of the conductive hydrophobic layer greater than that of the pixel definition layer, or by providing microstructures on the surface of the conductive hydrophobic layer, the hydrophobic effect of the conductive hydrophobic layer is improved.

[0068] Specifically, to make the conductive hydrophobic layer hydrophobic, the surface roughness of the conductive hydrophobic layer can be increased by methods such as mechanical polishing and chemical etching to increase hydrophobicity; the crystal structure and surface properties of the conductive hydrophobic layer can also be changed by heat treatment to improve hydrophobicity; and the hydrophobicity can also be improved by etching the conductive hydrophobic layer to form microstructures such as nanoflowers.

[0069] Specifically, the materials for the conductive hydrophobic layer include zinc, iron, silver, indium tin oxide, copper, gold, aluminum, gallium arsenide, gallium nitride, graphite, carbon nanotubes, graphene oxide, and titanium.

[0070] Specifically, zinc can be deposited by physical vapor deposition and etched to form a conductive and hydrophobic layer on its surface, creating microstructures such as nanoflowers. Zinc can be replaced with other metals or semiconductors, such as iron, silver, indium tin oxide, copper, gold, aluminum, gallium arsenide, gallium nitride, graphite, carbon nanotubes, and graphene oxide.

[0071] Specifically, a conductive hydrophobic layer can be formed on the surface of titanium by methods such as mechanical polishing and chemical etching, thereby increasing its surface roughness and hydrophobicity.

[0072] Specifically, the hydrophobicity of titanium can be improved by altering its crystal structure and surface properties through heat treatment.

[0073] Specifically, the material of the common electrode layer may include at least one of magnesium and silver, or a stack of magnesium and silver.

[0074] Specifically, the material of the common electrode layer may include indium tin oxide.

[0075] Specifically, the material of the pixel definition layer includes either organic or inorganic materials.

[0076] Specifically, such as Figure 3 As shown, the display panel 2 also includes a non-display area 202, which can be set around the display area 201.

[0077] Specifically, such as Figure 4 As shown, the display panel also includes a driving circuit layer 212, a planarization layer 213, a light-emitting material layer 217, a barrier 219, an encapsulation layer, and a cover plate 221.

[0078] Specifically, in this embodiment of the present invention, the height of the light-emitting material layer 217 is less than the height of the pixel definition layer. However, this embodiment of the present invention is not limited to this. The height of the light-emitting material layer can be greater than the height of the pixel definition layer. Furthermore, for each film layer in the light-emitting material layer, some film layers can be set as a whole layer, which can be located on the conductive hydrophobic layer. For example, the light-emitting material layer includes an electronic layer, which can be set on the conductive hydrophobic layer.

[0079] Specifically, such as Figure 4 As shown, the luminescent material layer 217 includes a first luminescent material layer 217a, a second luminescent material layer 217b, and a third luminescent material layer 217c. The luminescent colors of the first luminescent material layer 217a, the second luminescent material layer 217b, and the third luminescent material layer 217c are different from each other. It can be understood that the luminescent material layer 217 may include a hole layer, a luminescent layer, and an electron layer. The hole layer may specifically include a hole transport layer and a hole injection layer, and the electron layer may include an electron transport layer and an electron injection layer. Therefore, the first luminescent material layer 217a, the second luminescent material layer 217b, and the third luminescent material layer 217c may all include a hole layer, a luminescent layer, and an electron layer. The materials of the luminescent layers in the first luminescent material layer 217a, the second luminescent material layer 217b, and the third luminescent material layer 217c are different, thereby achieving the emission of light of different colors.

[0080] Specifically, the light-emitting colors of the first light-emitting material layer 217a, the second light-emitting material layer 217b, and the third light-emitting material layer 217c can be red, blue, and green, respectively. However, the embodiments of this utility model are not limited to this, and the pixel arrangement in the display panel can be other arrangements.

[0081] Specifically, such as Figure 4 As shown, the number of dashed lines representing light rays 31 indicates that the luminous brightness of different areas of the display panel is similar or even the same.

[0082] Meanwhile, this utility model embodiment provides a method for manufacturing a display panel, the method comprising:

[0083] A substrate is provided, and a driving circuit layer, a planarization layer, a pixel electrode layer, and a pixel definition layer are sequentially formed on the substrate; the structure of the display panel corresponding to this step is as follows. Figure 9 As shown in (a) in the text;

[0084] A conductive hydrophobic layer is formed on the entire surface of the pixel definition layer; the corresponding structure of the display panel is as follows. Figure 9 As shown in (b) in the image;

[0085] A photoresist 32 is formed on the pixel definition layer, and the photoresist 32 is patterned; the structure of the display panel corresponding to this step is as follows. Figure 9 As shown in (c);

[0086] The conductive hydrophobic layer is etched, and the photoresist is removed after etching; the corresponding structure of the display panel is as follows. Figure 9 As shown in (d);

[0087] A common electrode layer, a barrier, and a cover plate are formed on the conductive hydrophobic layer; the corresponding structure of the display panel is as follows: Figure 4 As shown.

[0088] Meanwhile, this utility model embodiment provides a display device, which includes a display panel as described in any of the above embodiments.

[0089] Specifically, the display panel can be an organic light-emitting diode (OLED) display panel.

[0090] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0091] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0092] The embodiments, implementation methods, and related technical features of this utility model can be combined and substituted for each other without conflict.

[0093] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A display panel, characterized in that, include: Substrate; A pixel electrode layer is disposed on one side of the substrate; A pixel definition layer is disposed on the side of the pixel electrode layer away from the substrate; A conductive hydrophobic layer is disposed on the side of the pixel definition layer away from the pixel electrode layer; A common electrode layer is disposed on the side of the conductive hydrophobic layer away from the pixel definition layer; The conductive hydrophobic layer is in direct contact with the pixel definition layer and the common electrode layer. The water droplet angle of the conductive hydrophobic layer is greater than that of the pixel definition layer, and the impedance of the conductive hydrophobic layer is less than that of the pixel definition layer. The surface in contact between the pixel definition layer and the conductive hydrophobic layer is a continuous surface.

2. The display panel according to claim 1, characterized in that, The pixel definition layer includes a pixel definition portion and a first opening located within the pixel definition portion. The conductive hydrophobic layer includes a conductive hydrophobic portion and a second opening located within the conductive hydrophobic portion. The conductive hydrophobic portion is disposed corresponding to the pixel definition portion, and the second opening is disposed corresponding to the first opening.

3. The display panel according to claim 2, characterized in that, The display panel includes a display area. In the middle region of the display area, the conductive hydrophobic portion is located on the pixel definition portion, and there is a gap between the conductive hydrophobic portion and the edge of the pixel definition portion. The width of the first opening is smaller than the width of the second opening.

4. The display panel according to claim 2, characterized in that, The display panel includes a display area, and in the edge region of the display area, the conductive hydrophobic portion extends to the sidewall of the pixel definition portion, and the conductive hydrophobic portion is located outside the first opening.

5. The display panel according to claim 2, characterized in that, The display panel includes a display area, and in the edge region of the display area, the conductive hydrophobic portion is located on the pixel definition portion, and there is a gap between the conductive hydrophobic portion and the edge of the pixel definition portion.

6. The display panel according to claim 2, characterized in that, The display panel includes a display area, and the area of ​​a second opening in the middle region of the display area is larger than the area of ​​a second opening in the edge region of the display area.

7. The display panel according to claim 3, characterized in that, The thickness of the conductive hydrophobic layer is greater than the thickness of the pixel definition layer.

8. The display panel according to claim 1, characterized in that, The pixel definition layer includes a plurality of pixel definition parts arranged in an array, the plurality of pixel definition parts being spaced apart along a first direction, and the conductive hydrophobic layer includes a plurality of conductive hydrophobic parts arranged in an array, the plurality of conductive hydrophobic parts being spaced apart along a second direction, wherein the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

9. The display panel according to any one of claims 1 to 8, characterized in that, The surface roughness of the conductive hydrophobic layer is greater than that of the pixel definition layer; or the surface of the conductive hydrophobic layer is provided with microstructures.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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