Display panel and display device

Abstract

The present application discloses a display panel and a display device, which belong to the field of display technology. The display panel includes: a driving backplane, a first electrode, a pixel definition layer, an organic light-emitting layer, and a second electrode layer. Among them, the pixel definition layer can have multiple pixel openings and partition grooves, and the pixel openings and the partition grooves can sequentially penetrate the second definition layer and the first definition layer in the pixel definition layer. For any pixel opening, the second definition layer surrounding the pixel opening is flush with the side facing the driving backplane, which can ensure that the partition grooves distributed on one side of any pixel opening have the same partitioning effect on the organic light-emitting layer as the partition grooves on the other side of the pixel opening. That is, the partition grooves distributed around any pixel opening have the same partitioning effect on the lateral leakage current generated in the organic light-emitting layer, thereby ensuring a better display effect of the display panel.

Description

Technical Field

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

[0002] With the development of display technology, display devices are being used more and more widely. Among them, organic light emitting diode (OLED) display panels have attracted more and more attention.

[0003] OLED display panels generally include a driver backplane and multiple light-emitting devices located on the driver backplane. The light-emitting layers in each light-emitting device are uniformly deposited through an evaporation process, meaning the light-emitting layers in each light-emitting device are connected together. To prevent lateral leakage current generated by the light-emitting layer in a particular light-emitting device from causing adjacent light-emitting devices to also emit light, it is necessary to provide isolation grooves within the pixel definition layer distributed between adjacent light-emitting devices to block lateral leakage current.

[0004] However, in the same OELD display panel, the isolation grooves provided in different areas of the pixel definition layer have different isolation effects on the lateral leakage current, resulting in a poor display effect of the display panel. Summary of the Invention

[0005] The embodiments of the present application provide a display panel and a display device. They can solve the problem of poor display quality of OLED display panels in the prior art. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, comprising: a driving backplane, a first electrode layer, a pixel definition layer, an organic light emitting layer, and a second electrode layer;

[0007] The first electrode layer is located on one side of the driving backplane, and the first electrode layer has a plurality of separately arranged first electrodes, and the first electrodes are electrically connected to the driving backplane; the driving backplane has a groove on a side facing the first electrode layer, and the groove is distributed between the orthographic projections of two adjacent first electrodes on the driving backplane, and the groove includes at least two first sub-grooves and second sub-grooves distributed in different areas, and the depth of the first sub-groove is greater than the depth of the second sub-groove;

[0008] The pixel definition layer is located on a side of the first electrode layer away from the driving backplane, and includes a first definition layer and a second definition layer stacked in a direction perpendicular to and away from the driving backplane, and the pixel definition layer has pixel openings and partition grooves that sequentially penetrate the second definition layer and the first definition layer;

[0009] The organic light emitting layer is located on a side of the pixel definition layer away from the driving backplane;

[0010] The second electrode layer is located on a side of the organic light emitting layer away from the driving backplane;

[0011] The distance between the side of the first definition layer away from the driving back plate and the bottom surface of the first sub-groove is greater than the distance between the side of the first definition layer away from the driving back plate and the bottom surface of the second sub-groove.

[0012] Optionally, a side of the first definition layer for surrounding the pixel opening facing away from the driving backplane is flush, and a side of the first definition layer facing away from the driving backplane is a plane parallel to the driving backplane.

[0013] Optionally, the first definition layer includes: a first portion and a second portion that are connected, wherein an orthographic projection of the first portion on the driving backplane is located in the area where the groove is located, and an orthographic projection of the second portion on the driving backplane is located within an orthographic projection of the first electrode layer on the driving backplane;

[0014] Wherein, in a direction perpendicular to the driving back plate, the thickness of the first portion is greater than the thickness of the second portion.

[0015] Optionally, the pixel definition layer also includes: a third definition layer, the third definition layer is located on the side of the first definition layer facing the driving backplane, the pixel opening and the partition groove also pass through the third definition layer, and the side of the third definition layer away from the driving backplane is parallel to the plane of the driving backplane, and in the direction perpendicular to the driving backplane, the thickness at each position in the first definition layer is the same.

[0016] Optionally, the third definition layer includes: a third portion and a fourth portion that are connected, the orthographic projection of the third portion on the driving backplane is located within the area where the groove is located, and the orthographic projection of the fourth portion on the driving backplane is located within the orthographic projection of the first electrode layer on the driving backplane;

[0017] Wherein, in a direction perpendicular to the driving back plate, the thickness of the third portion is greater than the thickness of the fourth portion.

[0018] Optionally, the display panel further includes: a filling layer, the filling layer being located on a side of the driving backplane where the first electrode layer is provided, and being distributed between two adjacent first electrodes, wherein a portion of the filling layer facing the driving backplane is located in the groove;

[0019] The maximum distance between the driving backplate and the side of the filling layer facing away from the driving backplate is less than or equal to the distance between the driving backplate and the side of the first electrode layer facing away from the driving backplate.

[0020] Optionally, the driving backplane has an insulating layer on the side facing the first electrode layer, the insulating layer has the groove, and multiple through holes corresponding to the multiple first electrodes one by one, and the first electrodes are electrically connected to the driving backplane through the corresponding through holes.

[0021] Optionally, the display panel further includes: a filling layer, the filling layer being located on a side of the driving backplane where the first electrode layer is provided, and being distributed between two adjacent first electrodes, wherein a portion of the filling layer facing the driving backplane is located in the groove;

[0022] In which, the side of the filling layer facing away from the driving backplane is a plane parallel to the driving backplane, the distance between the side of the filling layer facing away from the driving backplane and the driving backplane is greater than the distance between the side of the first electrode layer facing away from the driving backplane and the driving backplane, and the filling layer covers the edge portion of the first electrode.

[0023] Optionally, the orthographic projection of the pixel definition layer on the driving backplane is located within the orthographic projection of the filling layer on the driving backplane, and the outer boundary of the orthographic projection of the pixel definition layer on the driving backplane does not overlap with the outer boundary of the orthographic projection of the filling layer on the driving backplane.

[0024] Optionally, in a direction perpendicular to the driving backplate, the thickness at each position in the first definition layer is the same.

[0025] Optionally, the thickness at each position in the second definition layer is the same.

[0026] Optionally, the pixel definition layer further includes: a third definition layer, the third definition layer is located on a side of the first definition layer facing the driving backplane, and the pixel opening and the partition groove also penetrate the third definition layer;

[0027] The side of the third definition layer facing away from the partition groove protrudes outward relative to the side of the first definition layer facing away from the partition groove; the side of the first definition layer facing away from the partition groove protrudes outward relative to the side of the second definition layer facing away from the partition groove, or the side of the first definition layer facing away from the partition groove is flush with the side of the second definition layer facing away from the partition groove.

[0028] Optionally, the pixel definition layer further includes: a third definition layer, the third definition layer is located on a side of the first definition layer facing the driving backplane, and the pixel opening and the partition groove also penetrate the third definition layer;

[0029] The side of the third definition layer close to the partition groove protrudes outward relative to the side of the first definition layer close to the partition groove, and the side of the second definition layer close to the partition groove protrudes outward relative to the side of the first definition layer close to the partition groove.

[0030] Optionally, a side of the first definition layer close to the partition groove includes an arc-shaped concave surface;

[0031] Alternatively, the first definition layer comprises an inclined surface on a side close to the partition groove, and an angle between the inclined surface and a side of the first definition layer facing the third definition layer is an acute angle;

[0032] Alternatively, the side of the first definition layer close to the partition groove includes a first slope and a second slope, the first slope is closer to the drive back plate than the second slope, and the angle between the first slope and the side of the first definition layer facing the third definition layer is an acute angle, and the angle between the second slope and the side of the first definition layer facing the second definition layer is an acute angle.

[0033] On the other hand, a display device is provided, including: a driving chip and a display panel, the display panel being the above-mentioned display panel, and the driving chip being configured to apply a driving signal to the display panel.

[0034] The technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0035] The display panel includes: a driving backplane, a first electrode, a pixel definition layer, an organic light-emitting layer, and a second electrode layer. The pixel definition layer can have multiple pixel openings and partition grooves, and the pixel openings and partition grooves can sequentially penetrate the second definition layer and the first definition layer in the pixel definition layer. For any pixel opening, the second definition layer used to surround this pixel opening is flush with the side facing the driving backplane, so that the inscribed height of the partition grooves distributed on one side of this pixel opening is the same as the inscribed height of the partition grooves distributed on the other side of this pixel opening. To this end, it can be ensured that the partition grooves distributed on one side of any pixel opening have the same partitioning effect on the organic light-emitting layer as the partition grooves on the other side of this pixel opening. That is, the partition grooves distributed around any pixel opening have the same partitioning effect on the lateral leakage current generated in the organic light-emitting layer, thereby ensuring a better display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 It is a schematic diagram of the local structure of a display panel;

[0038] Figure 2 is a top view of a display panel provided in an embodiment of the present application;

[0039] Figure 3 yes Figure 2 A schematic cross-sectional view of the display panel taken at AA' is shown;

[0040] Figure 4 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application;

[0041] Figure 5 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0042] Figure 6 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0043] Figure 7 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0044] Figure 8 1 is a schematic diagram of forming a photoresist on one side of an insulating layer provided by an embodiment of the present application;

[0045] Figure 9 is a schematic diagram of a patterned photoresist provided in an embodiment of the present application;

[0046] Figure 10 This is a schematic diagram of forming a first electrode on one side of a patterned photoresist provided by an embodiment of the present application;

[0047] Figure 11 Schematic diagram of stripping a patterned photoresist provided in an embodiment of the present application;

[0048] Figure 12 is a partial cross-sectional schematic diagram of a display panel provided by another embodiment of the present application;

[0049] Figure 13 is a partial cross-sectional schematic diagram of another display panel provided by another embodiment of the present application;

[0050] Figure 14This is a partial cross-sectional schematic diagram of another display panel provided in another embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0052] In the related art, a silicon-based OLED display panel may include: a driving backplane, and a plurality of light-emitting devices located on the driving backplane. Each light-emitting device includes: a first electrode, a light-emitting layer, and a second electrode. The light-emitting layer is composed of at least one sub-light-emitting layer. Each sub-light-emitting layer may include: a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer arranged in a stacked manner. In the case where the light-emitting layer is composed of a plurality of stacked sub-light-emitting layers, the sub-light-emitting layers are connected in series through a charge generation layer. In this way, the color of the light emitted by the light-emitting layer is determined by the plurality of sub-light-emitting layers. For example, if the light-emitting layer needs to emit white light, a sub-light-emitting layer capable of emitting red light, a sub-light-emitting layer capable of emitting green light, and a sub-light-emitting layer capable of emitting blue light can be stacked so that the light-emitting layer emits white light. Alternatively, a sub-light-emitting layer capable of emitting yellow light and a sub-light-emitting layer capable of emitting blue light can be stacked so that the light-emitting layer emits white light.

[0053] Wherein, the first electrode is electrically connected to the driving backplane. When a voltage is applied to the first electrode, an electric field is formed between the first electrode and the second electrode. In this way, the hole injection layer can inject holes into the hole transport layer, and the holes are transported to the light-emitting material layer through the hole transport layer. The electron injection layer can inject electrons into the electron transport layer, and the electrons are transported to the light-emitting material layer through the electron transport layer. The holes and electrons combine with high-energy excitons in the light-emitting material layer, and the high-energy excitons are unstable and can easily transition to low-energy excitons and release energy. When releasing energy, photons are generated to emit light with a wavelength within a certain range. In the case where the light-emitting layer is composed of multiple sub-light-emitting layers, the charge generation layer is usually made of a material with good conductivity so that each sub-light-emitting layer can emit light, thereby making the light-emitting effect of the light-emitting layer better.

[0054] Since the light-emitting layers in each light-emitting device are uniformly formed by evaporation, that is, the light-emitting layers in each light-emitting device are connected together. In order to prevent the lateral leakage current generated by the charge generation layer in a light-emitting device from causing the adjacent light-emitting device to emit light during the light-emitting process of a certain light-emitting device, a pixel definition layer is required between adjacent light-emitting devices, and the charge generation layer is isolated by the isolation groove provided in the pixel definition layer, thereby isolating the lateral leakage current. A filling layer can also be provided on the side of the pixel definition layer close to the driving backplane to reduce the overall step difference of the pixel definition layer.

[0055] During the display panel manufacturing process, to ensure that two adjacent first electrodes do not connect, the etching time is usually increased to completely remove the portion between the two adjacent first electrodes. However, this also causes over-etching. Typically, because the concentration of the etching solution varies across different areas of the display panel, the over-etching depth varies across different areas after the over-etching process.

[0056] For this reason, Figure 1 As shown, during the process of forming the first electrode layer 200 in the display panel 000, after the portion between two adjacent first electrodes 210 is overetched, the insulating layer 110 in the driving backplane 100 is also etched to form a groove O on the side of the insulating layer 110 facing the first electrode layer 200. Because the concentration of the etching solution distributed in different areas during the overetching process is different, the depth of the groove O formed on the insulating layer 110 in different areas is different. As a result, after the filling layer 600 is formed between two adjacent first electrodes 210, the distance between the side of the filling layer 600 facing away from the driving backplane 100 and the driving backplane 100 in different areas will be different.

[0057] Typically, to ensure that the isolation grooves U in the pixel definition layer 300 have a certain isolation effect, the pixel definition layer 300 can be composed of two or more inorganic insulating layers stacked together. In this way, when the distance between the side of the filling layer 600 facing away from the driving backplate 100 and the driving backplate 100 is different in different areas, the flatness of each inorganic insulating layer in the pixel definition layer 300 facing away from the driving backplate 100 is poor. Thus, for a certain pixel opening K, the inscribed height h1 of the isolation grooves U distributed on one side of this pixel opening K is different from the inscribed height h2 of the isolation grooves U distributed on the other side of this pixel opening K. Furthermore, since the inscribed height of the isolation grooves U directly affects their isolation effect on the charge generation layer, when the inscribed heights of the isolation grooves U at different locations are different, the isolation effect of the isolation grooves U distributed on one side of this pixel opening K on the charge generation layer will be different from the isolation effect of the isolation grooves U distributed on the other side of this pixel opening K. Therefore, in the same display panel, the isolation grooves U provided in different areas of the pixel definition layer 300 have different isolation effects on the lateral leakage current, resulting in a poor display effect of the display panel.

[0058] It should be noted that the inscribed height of the partition groove U refers to the vertical distance between the portion of the outermost inorganic insulating layer in the pixel definition layer 300 close to the partition groove U and the first electrode 210 .

[0059] In order to solve the above technical problems, the present application provides a display panel. Figure 2and Figure 3 , Figure 2 is a top view of a display panel provided in an embodiment of the present application, Figure 3 yes Figure 2 The display panel 000 is a schematic cross-sectional view taken along line AA′. The display panel 000 may include a driving backplane 100 , a first electrode layer 200 , a pixel definition layer 300 , an organic light emitting layer 400 , and a second electrode layer 500 .

[0060] The first electrode layer 200 in the display panel 000 is located on one side of the driving backplane 100. The first electrode layer 200 includes a plurality of separately disposed first electrodes 210, which are electrically connected to the driving backplane 100. A groove O is provided on the side of the driving backplane 100 facing the first electrode layer 200. The groove O is located between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100. The groove O includes at least two first sub-grooves O1 and a second sub-groove O2 distributed in different regions. The depth of the first sub-groove O1 is greater than the depth of the second sub-groove O2.

[0061] For example, Figure 3 As shown, since the concentration of the etching solution distributed in different areas is different during the over-etching process, the depth of the first sub-groove O1 distributed on one side of the first electrode 210 is different from that of the second sub-groove O2 distributed on the other side of the first electrode 210, and the depth d1 of the first sub-groove O1 is greater than the depth d2 of the second sub-groove O2.

[0062] The pixel definition layer 300 in the display panel 000 is located on the side of the first electrode layer 200 away from the driving backplane 100. The pixel definition layer 300 includes: a first definition layer 310 and a second definition layer 320 stacked in a direction perpendicular to and away from the driving backplane 100, and the pixel definition layer 300 has pixel openings K and partition grooves U that pass through the second definition layer 320 and the first definition layer 310 in sequence. The number of pixel openings K in the pixel definition layer 300 can be multiple, and the partition grooves U can be distributed between two adjacent pixel openings K. The multiple pixel openings K correspond one-to-one to the multiple first electrodes 210. Here, the orthographic projection of each pixel opening K in the pixel definition layer 300 on the driving backplane 100 is located within the orthographic projection of the corresponding first electrode 210 on the driving backplane 100.

[0063] The organic light-emitting layer 400 in the display panel 000 is located on the side of the pixel definition layer 300 facing away from the driver backplane 100. The organic light-emitting layer 400 may be composed of multiple stacked organic material layers, each of which may include at least one sub-light-emitting layer. Each sub-light-emitting layer includes a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer, stacked perpendicularly and away from the driver backplane 100. When the multiple organic material layers include multiple sub-light-emitting layers, the sub-light-emitting layers are connected in series via a charge generation layer. The isolation trench U in the pixel definition layer 300 can isolate at least some of the organic material layers in the organic light-emitting layer 400. For example, the isolation trench U can isolate the charge generation layer in the organic light-emitting layer 400, thereby isolating lateral leakage current. Of course, the hole injection layer, hole transport layer, light-emitting material layer, electron transport layer, and electron injection layer in the organic light-emitting layer 400 may also be isolated by the isolation trench U.

[0064] The second electrode layer 500 in the display panel 000 is located on a side of the organic light emitting layer 400 facing away from the driving backplane 100 .

[0065] It should be noted that the portion of the organic light-emitting layer 400 distributed within each pixel opening K may contact the corresponding first electrode 210. In this case, for any pixel opening K, the first electrode 210 corresponding to this pixel opening K, and the portions of the organic light-emitting layer 400 and the second electrode layer 500 distributed within this pixel opening K may constitute a light-emitting device.

[0066] It should also be noted that in order to ensure that the isolation slot U has a better isolation effect on the lateral leakage current, Figure 2 As shown, the isolation grooves U in the pixel definition layer 300 can be distributed around the periphery of each pixel opening K. That is, for any pixel opening K, there will be a circle of isolation grooves U distributed around this pixel opening K, thereby ensuring that the lateral leakage current generated in any direction during the light-emitting process of a light-emitting device will be isolated by the isolation grooves U distributed around this light-emitting device.

[0067] It should be noted that both the first definition layer 310 and the second definition layer 320 are inorganic insulating layers. When the depths of the first sub-recess O1 and the second sub-recess O2 in the recess O are different, the side of the first definition layer 310 facing away from the driver backplane 100 has poorer flatness. The present application can process a portion of the film layer in the display panel located on the side of the second definition layer 320 facing the driver backplane 100 to achieve higher flatness on the side of the first definition layer 310 facing away from the driver backplane 100.

[0068] In this case, the distance D1 between the side of the first definition layer 310 away from the driving back plate 100 and the bottom surface of the first sub-groove O1 is greater than the distance D2 between the side of the first definition layer 310 away from the driving back plate 100 and the bottom surface of the second sub-groove O2.

[0069] For example, for any pixel opening K, the side of the first definition layer 310 used to enclose the pixel opening K facing away from the driving backplane 100 is flush, thereby ensuring that the side of the second definition layer 320 used to enclose the pixel opening K facing the driving backplane 100 is flush.

[0070] In order to more clearly see the shape of the partition groove U around the pixel opening K, please refer to Figure 4 , Figure 4 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application, Figure 4 The display panel shown does not show the organic light-emitting layer 400 and the second electrode layer 500. For any pixel opening K, when the second definition layer 320 used to surround this pixel opening K is flush with the side facing the driving backplane 100, the inscribed height H1 of the partition groove U distributed on one side of this pixel opening K is the same as the inscribed height H2 of the partition groove U distributed on the other side of this pixel opening K. To this end, it can be ensured that the partition groove U distributed on one side of this pixel opening K has the same effect of isolating the charge generation layer in the organic light-emitting layer 400 as the partition groove U distributed on the other side of this pixel opening K. In other words, for any pixel opening K, the partition grooves U distributed around this pixel opening K have the same effect of isolating the lateral leakage current, thereby ensuring a better display effect of the display panel.

[0071] It should be noted that the second definition layer 320 in the pixel definition layer 300 can be the outermost inorganic insulating layer. That is, the second definition layer 320 is the inorganic insulating layer in the pixel definition layer 300 that is farthest from the driving backplane 100. Therefore, the vertical distance between the portion of the second definition layer 320 located near the isolation groove U and the first electrode layer 200 is the inscribed height of the isolation groove U.

[0072] In summary, the display panel provided by the embodiment of the present application includes: a driving backplane, a first electrode, a pixel definition layer, an organic light-emitting layer and a second electrode layer. Among them, the pixel definition layer can have multiple pixel openings and partition grooves, and the pixel openings and the partition grooves can sequentially penetrate the second definition layer and the first definition layer in the pixel definition layer. For any pixel opening, the second definition layer used to enclose this pixel opening is flush with the side facing the driving backplane, so that the inscribed height of the partition groove distributed on one side of this pixel opening is the same as the inscribed height of the partition groove distributed on the other side of this pixel opening. To this end, it can be ensured that the partition groove distributed on one side of any pixel opening has the same partition effect on the organic light-emitting layer as the partition groove on the other side of this pixel opening. That is, the partition grooves distributed around any pixel opening have the same partition effect on the lateral leakage current generated in the organic light-emitting layer, thereby ensuring a better display effect of the display panel.

[0073] In this application, if Figure 4 As shown, the side of the first definition layer 310 facing away from the driving backplane 100 is parallel to the plane of the driving backplane 100. In this case, the side of the second definition layer 320 facing the driving backplane 100 is also parallel to the plane of the driving backplane 100. To this end, the vertical distance between the second definition layer 320 and the first electrode layer 200 at any position is equal, so that the inscribed height of the isolation groove U of the pixel definition layer 300 at any position is the same, thereby ensuring that the isolation groove U at any position has the same isolation effect on the charge generation layer in the organic light-emitting layer 400. In other words, it can ensure that the isolation groove U at any position has the same isolation effect on the lateral leakage current. In this way, the display effect of the display panel can be further improved.

[0074] It should be noted that the pixel definition layer 300 in the display panel 000 may include two inorganic insulating layers or three inorganic insulating layers. Of course, it may also include more inorganic insulating layers, which is not limited in this embodiment of the present application.

[0075] Here, in the case where the pixel definition layer 300 includes two inorganic insulating layers, as shown in FIG. Figure 4 As shown, the two inorganic insulating layers may be respectively: a first definition layer 310 and a second definition layer 320. The second definition layer 320 may be located on the side of the first definition layer 310 facing away from the driving backplane 100, and the partition grooves U and the pixel openings K in the pixel definition layer 300 may sequentially penetrate the second definition layer 320 and the first definition layer 310.

[0076] To ensure that the blocking trench U in the pixel definition layer 300, which is composed of the first definition layer 310 and the second definition layer 320, has the ability to block lateral leakage current, it is necessary to ensure that the side of the second definition layer 320 near the blocking trench U is outwardly protruding relative to the side of the first definition layer 310 near the blocking trench U, so that a concave structure can be formed on the inner wall of the blocking trench U. In this way, after the organic light-emitting layer 400 is formed through the evaporation process, part of the organic material layer in the organic light-emitting layer 400 can be blocked by the concave structure provided on the inner wall of the blocking trench U, thereby ensuring that the blocking trench U has the ability to block lateral leakage current.

[0077] In the case where the pixel definition layer 300 includes three inorganic insulating layers, please refer to Figure 5 , Figure 5 FIG. 1 is a partial cross-sectional diagram of another display panel provided by an embodiment of the present application. The three inorganic insulating layers may be: a first definition layer 310, a second definition layer 320, and a third definition layer 330. The second definition layer 320 may be located on the side of the first definition layer 310 facing away from the driver backplane 100, and the third definition layer 330 may be located on the side of the first definition layer 310 facing the driver backplane 100. The partition grooves U and the pixel openings K in the pixel definition layer 300 may sequentially penetrate the second definition layer 320, the first definition layer 310, and the third definition layer 330.

[0078] To ensure that the blocking trench U in the pixel definition layer 300, which is composed of the first definition layer 310, the second definition layer 320, and the third definition layer 330, has the ability to block lateral leakage current, it is necessary to ensure that the side of the second definition layer 320 near the blocking trench U is protruding outward relative to the side of the first definition layer 310 near the blocking trench U, and it is necessary to ensure that the side of the third definition layer 330 near the blocking trench U is protruding outward relative to the side of the first definition layer 310 near the blocking trench U, so that a concave structure can be formed on the inner wall of the blocking trench U. In this way, after the organic light-emitting layer 400 is formed by the evaporation process, part of the organic material layer in the organic light-emitting layer 400 can be blocked by the action of the concave structure provided on the inner wall of the blocking trench U, thereby ensuring that the blocking trench U has the ability to block lateral leakage current.

[0079] Optional, such as Figure 4 and Figure 5As shown, each first electrode 210 in the first electrode layer 200 may include: a first sub-electrode 201, a second sub-electrode 202, and a third sub-electrode 203 stacked in a direction perpendicular to and away from the driving backplane 100. Here, the main material of the first sub-electrode 201 is titanium or titanium nitride, and the first sub-electrode 201 is used to enhance the adhesion between the second sub-electrode 202 and the driving backplane 100; the main material of the second sub-electrode 202 is aluminum or silver, and the second sub-electrode 202 is used to reflect the light emitted by the organic light-emitting layer 400 in the direction toward the driving backplane 100, so that the reflected light can be emitted in a direction away from the driving backplane 100. The reflected light can generate a coherent effect with the light emitted from the organic light-emitting layer 400 in the direction away from the driving backplane 100, thereby generating a coherently enhanced microcavity effect, thereby improving the light output efficiency of the display panel 000. The main material of the third sub-electrode 203 is indium tin oxide or indium zinc oxide. The third sub-electrode 203 made of indium tin oxide or indium zinc oxide can improve the work function of the second sub-electrode 202 with reflective performance, which is beneficial to improving the electrical performance of the first electrode 210.

[0080] In this application, the driving backplane 100 has an insulating layer 110 on a side facing the first electrode layer 200. The insulating layer 110 has a plurality of through holes G corresponding to the first electrodes 210. The first electrodes 210 are electrically connected to the driving backplane 100 through the corresponding through holes G.

[0081] In the present application, the display panel 000 may further include a filling layer 600. The filling layer 600 may be located on a side of the driving backplane 100 where the first electrode layer 200 is disposed, and may be distributed between two adjacent first electrodes 210 in the first electrode layer 200. The portion of the filling layer 600 facing the driving backplane 100 may be located within the groove O.

[0082] In this case, the pixel definition layer 300 in the display panel 000 can be distributed on the side of the filling layer 600 away from the driving backplane 100, and the pixel definition layer 300 can be partially raised to reduce the overall step difference of the pixel definition layer 300.

[0083] In the embodiment of the present application, the maximum distance between the side of the filling layer 600 facing away from the driving backplate 100 and the driving backplate 100 may be less than or equal to the distance between the side of the first electrode layer 200 facing away from the driving backplate 100 and the driving backplate 100. Of course, the maximum distance between the side of the filling layer 600 facing away from the driving backplate 100 and the driving backplate 100 may also be greater than the distance between the side of the first electrode layer 200 facing away from the driving backplate 100 and the driving backplate 100. With respect to different types of filling layers, the embodiment of the present application will be schematically described using the following two optional implementations as examples.

[0084] In a first optional implementation, when the maximum distance between the side of the filling layer 600 facing away from the driving back plate 100 and the driving back plate 100 is less than or equal to the distance between the side of the first electrode layer 200 facing away from the driving back plate 100 and the driving back plate 100, as shown in FIG. Figure 4 and Figure 5 As shown, due to the over-etching problem in the process of preparing the first electrode layer 200 in the display panel 100, the side of the distributed insulating layer 110 facing the driving backplane has a groove O, and the depths of the grooves O distributed in different areas are different. Here, the orthographic projection of the groove O of the insulating layer 110 on the driving backplane 100 can be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100. For example, the orthographic projection of the groove O on the driving backplane 100 can surround the periphery of the orthographic projections of each first electrode 210 on the driving backplane 100. In the process of forming the filling layer 600, the groove O is filled with the filling layer 600, which may cause different distances between the side of the filling layer 600 facing away from the driving backplane 100 and the driving backplane 100 in different areas.

[0085] In this case, in order to improve the flatness of the side of the first definition layer 310 in the pixel definition layer 300 that faces away from the driving backplane 100 so that the side of the first definition layer 310 that faces away from the driving backplane 100 is parallel to the plane of the driving backplane 100, the embodiment of the present application proposes the following two improvement solutions:

[0086] The first improvement is to grind the side of the first definition layer 310 in the pixel definition layer 300 facing away from the driving backplane 100. This improvement can be applied to pixel definition layers 300 composed of two inorganic insulating layers or three inorganic insulating layers.

[0087] For example, since the first definition layer 310 is an inorganic insulating layer, and the first electrode layer 100 and the filling layer 600 in the display panel 100 have poor flatness on the side facing away from the driving backplane 100, whether the first definition layer 310 is formed directly on the side of the first electrode layer 100 and the filling layer 600 facing away from the driving backplane 100, or the third definition layer 330 is first formed on the side of the first electrode layer 100 and the filling layer 600 facing away from the driving backplane 100, and then the first definition layer 310 is formed on the side of the third definition layer 330 facing away from the driving backplane 100, both results in poor flatness of the first definition layer 310 facing away from the substrate 100. To this end, after the first definition layer 310 is formed, the side of the first definition layer 310 facing away from the driving back plate 100 can be smoothed to improve the flatness of the side of the first definition layer 310 facing away from the driving back plate 100, so that the side of the first definition layer 310 facing away from the driving back plate 100 is a plane parallel to the driving back plate 100.

[0088] In this case, if Figure 4 and Figure 5 As shown, the first definition layer 310 in the pixel definition layer 300 may include: a first portion 311 and a second portion 312, which are connected. The orthographic projection of the first portion 311 on the driving backplane 100 is located within the region where the groove O is located, and the orthographic projection of the second portion 312 on the driving backplane 100 is located within the orthographic projection of the first electrode layer 200 on the driving backplane 100. Here, in a direction perpendicular to the driving backplane 100, the thickness of the first portion 311 is greater than the thickness of the second portion 312.

[0089] That is, after the side of the first definition layer 310 facing away from the driver backplate 100 is ground flat, the thickness of the first definition layer 310 varies at different locations. Here, because the distance between the first portion 311 of the first definition layer 300 facing the driver backplate 100 and the driver backplate 100 is smaller, and the distance between the second portion 312 of the first definition layer 310 facing the driver backplate 100 and the driver backplate 100 is larger, during the grinding process on the side of the first definition layer 310 facing away from the driver backplate 100, the first portion 311 of the first definition layer 310 is ground flat to a smaller thickness, while the second portion 312 of the first definition layer 310 is ground flat to a larger thickness. Therefore, after the side of the first definition layer 310 facing away from the driver backplate 100 is ground flat, the thickness of the first portion 311 remaining in the first definition layer 310 is greater than the thickness of the second portion 312 remaining.

[0090] It should be noted that, after the second definition layer 320 is subsequently formed on the side of the first definition layer 310 facing away from the driver backplate 100 after being smoothed, it can be ensured that the side of the second definition layer 320 facing the driver backplate 100 and the side of the second definition layer 320 facing away from the driver backplate 100 are both planes parallel to the driver back plate 100. Therefore, the thickness of the second definition layer 320 at all locations in the direction perpendicular to the driver backplate 100 is the same.

[0091] The second improvement is mainly aimed at the pixel definition layer 300 composed of three inorganic insulating layers. Figure 6 , Figure 6 This is a partial cross-sectional diagram of another display panel provided by an embodiment of the present application. The side of the third definition layer 330 in the pixel definition layer 300 facing away from the driver backplane 100 can be smoothed so that the side of the third definition layer 330 facing away from the driver backplane 100 is parallel to the driver backplane 100.

[0092] In this case, the third definition layer 330 in the pixel definition layer 300 may include a third portion 331 and a fourth portion 332 that are connected. The orthographic projection of the third portion 331 on the driving backplane 100 is located within the region where the groove O is located, and the orthographic projection of the fourth portion 332 on the driving backplane 100 is located within the orthographic projection of the first electrode layer 200 on the driving backplane 100. Here, in a direction perpendicular to the driving backplane 100, the thickness of the third portion 331 is greater than the thickness of the fourth portion 332.

[0093] That is, after the side of the third definition layer 330 facing away from the driver backplate 100 is ground flat, the thickness of the third definition layer 330 varies at different locations. Here, because the distance between the third portion 331 of the third definition layer 330 facing the driver backplate 100 and the driver backplate 100 is smaller, while the distance between the fourth portion 332 of the third definition layer 330 facing the driver backplate 100 and the driver backplate 100 is larger, during the grinding process on the side of the third definition layer 330 facing away from the driver backplate 100, the third portion 331 of the third definition layer 330 is ground flat to a smaller thickness, while the fourth portion 332 of the third definition layer 330 is ground flat to a larger thickness. Therefore, after the side of the third definition layer 330 facing away from the driver backplate 100 is ground flat, the thickness of the remaining third portion 331 of the third definition layer 330 is greater than the thickness of the remaining fourth portion 332.

[0094] For example, since the third definition layer 330 is an inorganic insulating layer, and the first electrode layer 100 and the filling layer 600 in the display panel 100 have poor flatness on the side facing away from the driving backplane 100, forming the third definition layer 330 directly on the side of the first electrode layer 100 and the filling layer 600 facing away from the driving backplane 100 will result in poor flatness of the third definition layer 330 facing away from the substrate 100. To this end, after forming the third definition layer 310, the side of the third definition layer 330 facing away from the driving backplane 100 can be polished to improve the flatness of the side of the third definition layer 330 facing away from the driving backplane 100, so that the side of the third definition layer 330 facing away from the driving backplane 100 is parallel to the driving backplane 100.

[0095] It should be noted that when the first definition layer 310 is subsequently formed on the side of the ground third definition layer 330 facing away from the driver backplate 100, it is ensured that the side of the first definition layer 310 facing the driver backplate 100 and the side of the first definition layer 310 facing away from the driver backplate 100 are both planes parallel to the driver back plate 100. Therefore, the thickness of the first definition layer 310 at all locations in the direction perpendicular to the driver backplate 100 is the same.

[0096] Similarly, because the side of the first definition layer 310 facing away from the driver backplate 100 is a plane parallel to the driver back surface 100, after the second definition layer 320 is formed on the side of the first definition layer 310 facing away from the driver backplate 100, it can also be ensured that the side of the second definition layer 320 facing the driver backplate 100 and the side of the second definition layer 320 facing away from the driver backplate 100 are both planes parallel to the driver back surface 100. Therefore, the thickness of the second definition layer 320 at all locations in the direction perpendicular to the driver backplate 100 is also the same.

[0097] In the second optional implementation, when the maximum distance between the side of the filling layer 600 facing away from the driving back plate 100 and the driving back plate 100 is greater than the distance between the side of the first electrode layer 200 facing away from the driving back plate 100 and the driving back plate 100, please refer to Figure 7 , Figure 7 This is a partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present application. The side of the filling layer 600 facing away from the driving backplane 100 protrudes beyond the side of the first electrode layer 200 facing away from the driving backplane 100 .

[0098] In this case, to ensure that each inorganic insulating layer in the pixel definition layer 300 subsequently formed on the side of the filling layer 600 facing away from the substrate 100 has good flatness, it is necessary to ensure that the side of the filling layer 600 facing away from the driving backplane 100 is parallel to the driving backplane 100, and it is necessary to ensure that the orthographic projection of the pixel definition layer 300 on the driving backplane 100 is located within the orthographic projection of the filling layer 600 on the driving backplane 100. In this way, after each inorganic insulating layer in the pixel definition layer 300 is formed on the side of the filling layer 600 facing away from the substrate 100, it can be ensured that both the side facing the driving backplane 100 and the side facing away from the driving backplane 100 of these inorganic insulating layers are parallel to the driving backplane 100. In other words, in the direction perpendicular to the driving backplane 100, the thickness of each inorganic insulating layer in the pixel definition layer 300 is the same at all locations.

[0099] It should be noted that, under normal circumstances, the pixel definition layer 300 needs to cover the edge portions of each first electrode 210 in the first electrode layer 200 to prevent the etching marks generated on the edge of the first electrode 210 after etching from interfering with the normal light emission of the light-emitting device 200. However, when the side of the filling layer 600 facing away from the driving backplane 100 protrudes beyond the side of the first electrode layer 200 facing away from the driving backplane 100, and the orthographic projection of the pixel definition layer 300 on the driving backplane 100 is located within the orthographic projection of the filling layer 600 on the driving backplane 100, the pixel definition layer 300 will not cover the edge portions of each first electrode 210. For this reason, it is necessary to use the filling layer 600 to cover the edge portions of each first electrode 210. In other words, the filling layer 600 can cover the edge portions of each first electrode 210.

[0100] It should also be noted that, when the side of the filling layer 600 facing away from the driving backplane 100 protrudes beyond the side of the first electrode layer 200 facing away from the driving backplane 100, there are various design methods for making the side of the filling layer 600 facing away from the driving backplane 100 parallel to the plane of the driving backplane 100. The present application embodiment uses the following two design methods as examples for illustration:

[0101] In a first design method, the side of the filling layer 600 facing away from the driving back plate 100 is directly ground flat.

[0102] For example, Figure 7 As shown, due to the over-etching problem in the process of preparing the first electrode layer 200 in the display panel 100, the insulating layer 110 in the display panel 000 has a groove O on the side facing the first electrode layer 200. A portion of the filling layer 600 in the display panel 000 can be located in the groove O. Here, the orthographic projection of the groove O of the insulating layer 110 on the driving backplane 100 can be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100. For example, the orthographic projection of the groove O on the driving backplane 100 can surround the periphery of the orthographic projections of each first electrode 210 on the driving backplane 100.

[0103] Furthermore, because the concentrations of the etching solution distributed in different areas during the over-etching process are different, the depths of the grooves O formed on the insulating layer 110 in different areas are different. In this case, in order to ensure that the side of the filling layer 600 facing away from the driving backplane 100 is parallel to the plane of the driving backplane 100, the thickness of the filling layer 600 can be increased. In other words, it is necessary to ensure that the side of the formed filling layer 600 facing away from the driving backplane 100 protrudes beyond the side of the first electrode layer 200 facing away from the driving backplane. The portion of the filling layer 600 protruding from the first electrode layer 200 can be smoothed so that the side of the filling layer 600 facing away from the driving backplane 100 is parallel to the plane of the driving backplane 100.

[0104] The second design method is to improve the preparation process of the first electrode layer 200 so that the side of the insulating layer 110 facing the first electrode layer 200 no longer forms the groove O. Under this premise, the side of the filling layer 600 facing away from the driving backplane 100 is further polished.

[0105] For example, Figure 8 As shown in FIG. 1 , a photoresist film 700a is first coated on one side of the insulating layer 110. Then, as shown in FIG. Figure 9 As shown, the photoresist film 700a can be exposed and developed to obtain a patterned photoresist pattern 700b. Here, the orthographic projection of the photoresist pattern 700b on the driving backplane 100 can surround the periphery of the orthographic projection of each light-emitting device formed subsequently on the driving backplane. Figure 10 As shown, a metal conductive film 200a is formed on the side of the photoresist pattern 700b away from the driving backplane 100. Here, a portion of the metal conductive film 200a is located on the side of the photoresist pattern 700b away from the driving backplane 100, and the orthographic projection of the other portion of the metal conductive film 200a on the driving backplane 100 does not overlap with the orthographic projection of the photoresist pattern 700a on the driving backplane 100. Finally, as shown Figure 11 As shown, the photoresist pattern 700b is stripped. At this time, the portion of the metal conductive film 200a located on the side of the photoresist pattern 700b facing away from the driving backplane 100 will be stripped along with the photoresist pattern 800b, thereby retaining the portion of the metal conductive film 200a that does not overlap with the photoresist pattern 700a, ultimately forming the first electrode layer 200. In this case, there is no need to use a solution for over-etching the first electrode layer 200, so that the groove O is no longer formed on the side of the insulating layer 110 facing the first electrode 210. In other words, the side of the insulating layer 110 facing the first electrode 210 can be parallel to the plane of the driving backplane 100. In this way, the flatness of the film layer formed subsequently can be effectively improved.

[0106] In adopting Figures 8 to 12The process flow shown is used to prepare the first electrode layer 200, and then the filling layer 600 and the pixel definition layer 300 are formed. Figure 12 The display panel shown. Figure 12 As shown, Figure 12 This is a partial cross-sectional schematic diagram of a display panel provided by another embodiment of the present application. Because the side of the insulating layer 110 facing the first electrode layer 200 is no longer formed with the groove O, the filler layer 600 formed on the driver backplane 100 is relatively flat. Thus, during the grinding process of the side of the filler layer 600 facing away from the driver backplane 100, the thickness of the portion of the filler layer 600 that is ground away can be kept relatively small, thereby simplifying the grinding process of the filler layer 600.

[0107] It should be noted that the above embodiments list various possible implementations of the display panel 000. Figure 6 and Figure 7 Based on this, other features of the pixel definition layer 300 in the display panel 000 are described:

[0108] In the case where the maximum distance between the side of the filling layer 600 facing away from the driving back plate 100 and the driving back plate 100 is less than or equal to the distance between the side of the first electrode layer 200 facing away from the driving back plate 100 and the driving back plate 100, as shown in FIG. Figure 6 As shown, the third definition layer 330 in the pixel definition layer 300 may cover edge portions of each first electrode 210 in the first electrode layer 200 .

[0109] In the pixel definition layer 300, the side of the third definition layer 330 facing away from the partitioning groove U protrudes outward relative to the side of the first definition layer 310 facing away from the partitioning groove U, and the side of the first definition layer 310 facing away from the partitioning groove U protrudes outward relative to the side of the second definition layer 320 facing away from the partitioning groove U. In this case, the pixel opening K may include: a first sub-opening for penetrating the second sub-opening 320, a second sub-opening for penetrating the first definition layer 310, and a third sub-opening for penetrating the third definition layer 330. The third sub-opening, the second sub-opening, and the first sub-opening of the pixel opening K may be arranged in a sequentially connected manner in a direction away from the driving backplane 100. To this end, the size of the third sub-opening in the third definition layer 330 is smaller than the size of the second sub-opening in the first definition layer 310; and the size of the second sub-opening in the first definition layer 310 is smaller than the size of the third sub-opening in the second definition layer 320. That is, the sizes of the first sub-aperture, the second sub-aperture and the third sub-aperture in the pixel aperture K decrease in sequence.

[0110] In this case, the pixel opening K in the pixel definition layer 300 is a stepped opening. This ensures that the portion of the organic light-emitting layer 400 and the second electrode layer 500 located within the pixel opening K is relatively flat after the organic light-emitting layer 400 and the second electrode layer 500 are subsequently formed on the side of the pixel definition layer 300 facing away from the driver backplane 100. This ensures that the overall step difference of the portion of the organic light-emitting layer 400 and the second electrode layer 500 located within the pixel opening K is relatively small, thereby making the thickness of the portion of the organic light-emitting layer 400 located within the central region of the pixel opening K approximately equal to the thickness of the portion located within the peripheral region of the pixel opening K. This ensures a high degree of uniformity in the light emission of each light-emitting device in the display panel 000.

[0111] Furthermore, since the third sub-aperture closest to the driver backplane 100 in the pixel definition layer 300 is the smallest and extends through the third definition layer 330, for the same type of light-emitting devices, it is only necessary to ensure that the third definition layer 330 covers the same width of each first electrode 210 in the same type of light-emitting devices. This allows the third sub-apertures in the pixel openings K corresponding to the same type of light-emitting devices to have the same size, thereby ensuring that the light-emitting areas of the organic light-emitting layers 400 in the same type of light-emitting devices are the same, effectively improving the uniformity of light emission across the same type of light-emitting devices. Here, the same type of light-emitting devices refers to light-emitting devices that can emit light of the same color.

[0112] In the case where the maximum distance between the side of the filling layer 600 facing away from the driving back plate 100 and the driving back plate 100 is greater than the distance between the side of the first electrode layer 200 facing away from the driving back plate 100 and the driving back plate 100, as shown in FIG. Figure 7 As shown, because the filling layer 600 can cover the edge portions of each first electrode 210 in the first electrode layer 200, the pixel definition layer 300 no longer needs to separately cover the edge portions of each first electrode 210 in the first electrode layer 200. To this end, the orthographic projection of the pixel definition layer 300 on the driving backplane 100 can be non-overlapping with the orthographic projection of the filling layer 600 on the driving backplane 100. In other words, the side of the filling layer 600 facing the pixel opening K can protrude outward relative to the side of the pixel definition layer 300 facing the pixel opening K.

[0113] In this case, for light-emitting devices of the same type, it is only necessary to ensure that the filling layer 600 covers the same width of each first electrode 210 in the light-emitting devices of the same type. This allows the light-emitting areas of the organic light-emitting layer 400 in the light-emitting devices of the same type to be the same, effectively improving the uniformity of light emission of the light-emitting devices of the same type. Here, the light-emitting devices of the same type refer to light-emitting devices that can emit light of the same color.

[0114] In the pixel definition layer 300, the side of the third definition layer 330 facing away from the partitioning groove U protrudes outward relative to the side of the first definition layer 310 facing away from the partitioning groove U, and the side of the first definition layer 310 facing away from the partitioning groove U protrudes outward relative to the side of the second definition layer 320 facing away from the partitioning groove U. Furthermore, because the side of the filling layer 600 facing the pixel opening K protrudes outward relative to the side of the pixel definition layer 300 facing the pixel opening K, the side of the filling layer 600 facing the pixel opening K can also protrude outward relative to the side of the third definition layer 330 facing the pixel opening K. In this case, the pixel opening K can include: a first sub-opening for penetrating the second sub-definition layer 320, a second sub-opening for penetrating the first definition layer 310, a third sub-opening for penetrating the third definition layer 330, and a fourth sub-opening for penetrating the filling layer 600. Furthermore, the fourth sub-aperture, third sub-aperture, second sub-aperture, and first sub-aperture within the pixel aperture K can be sequentially arranged and connected in a direction away from the driving backplane 100. To this end, the size of the fourth sub-aperture within the filling layer 600 is smaller than the size of the third sub-aperture within the third definition layer 330; the size of the third sub-aperture within the third definition layer 330 is smaller than the size of the second sub-aperture within the first definition layer 310; and the size of the second sub-aperture within the first definition layer 310 is smaller than the size of the third sub-aperture within the second definition layer 320. In other words, the sizes of the first sub-aperture, second sub-aperture, third sub-aperture, and fourth sub-aperture within the pixel aperture K decrease in sequence.

[0115] In this case, the pixel opening K in the pixel definition layer 300 is a stepped opening. This ensures that the portion of the organic light-emitting layer 400 and the second electrode layer 500 located within the pixel opening K is relatively flat after the organic light-emitting layer 400 and the second electrode layer 500 are subsequently formed on the side of the pixel definition layer 300 facing away from the driver backplane 100. This ensures that the overall step difference of the portion of the organic light-emitting layer 400 and the second electrode layer 500 located within the pixel opening K is relatively small, thereby making the thickness of the portion of the organic light-emitting layer 400 located within the central region of the pixel opening K approximately equal to the thickness of the portion located within the peripheral region of the pixel opening K. This ensures a high degree of uniformity in the light emission of each light-emitting device in the display panel 000.

[0116] It should be noted that, in other possible implementations, the side of the first definition layer 310 facing away from the partitioning groove U may also be flush with the side of the second definition layer 320 facing away from the partitioning groove U. It is only necessary to ensure that the side of the third definition layer 330 facing away from the partitioning groove U protrudes outward relative to the side of the first definition layer 310 facing away from the partitioning groove U. This embodiment of the present application is not limited to this.

[0117] In the embodiment of the present application, a concave structure must be formed on the sidewall of the isolation trench U to enable the isolation trench U to block lateral leakage current. To ensure that the isolation trench U has a good ability to block lateral leakage current, the lateral dimensions of the concave structure on the sidewall of the isolation trench U must be limited. Here, the width of the second definition layer 320 protruding from the side of the first definition layer 310 protruding from the side of the isolation trench U must be greater than or equal to 0.05 microns, and the width of the third definition layer 330 protruding from the side of the first definition layer 310 protruding from the side of the isolation trench U must be greater than or equal to 0.05 microns.

[0118] It should be noted that, in the embodiment of the present application, it is only necessary to ensure that the width of the second definition layer 320 protruding from the side of the first definition layer 310 close to the partition groove U is greater than or equal to 0.05 microns, and to ensure that the width of the third definition layer 330 protruding from the side of the first definition layer 310 close to the partition groove U is greater than or equal to 0.05 microns, so that the concave structure on the side wall of the partition groove U can have a good effect of isolating the lateral leakage current, without having to worry about the morphology of the concave structure on the side wall of the partition groove U. For example, the following embodiments will be described in detail. Figure 12 Based on this, three possible morphologies of the concave structure on the side wall of the partition groove U are described:

[0119] The first possible morphology is Figure 12 As shown, the side of the first definition layer 310 close to the partition groove U can be an arc-shaped concave surface.

[0120] The second possible morphology is Figure 13 As shown, Figure 13 This is a partial cross-sectional schematic diagram of another display panel provided by another embodiment of the present application. The side of the first definition layer 310 close to the partition groove U is a slope X, and the angle between the slope X and the side of the first definition layer 310 facing the third definition layer 330 is an acute angle.

[0121] The third possible morphology is Figure 14 As shown, Figure 14 This is a partial cross-sectional schematic diagram of another display panel provided by another embodiment of the present application. The side of the first definition layer 310 close to the partition groove U is the first inclined surface X1 and the second inclined surface X2. The first inclined surface X1 is closer to the driving backplane 100 than the second inclined surface X2, and the angle between the first inclined surface X1 and the side of the first definition layer 310 facing the third definition layer 330 is an acute angle, and the angle between the second inclined surface X2 and the side of the first definition layer 310 facing the second definition layer 320 is an acute angle.

[0122] It should be noted that, in the above-mentioned embodiments, the smoothing treatment of a surface of a certain film layer facing away from the driver backplane refers to the use of a chemical mechanical polishing process or a back-etching process to treat the surface of the film layer facing away from the driver backplane, that is, to treat the surface of the film layer facing away from the driver backplane to be parallel to the plane of the driver backplane. For example, the smoothing treatment of a surface of the first definition layer facing away from the driver backplane refers to the use of a chemical mechanical polishing process or a back-etching process to treat the surface of the first definition layer facing away from the driver backplane.

[0123] It should also be noted that each inorganic insulating layer in the pixel definition layer in the embodiments of the present application needs to be processed separately through a single patterning process. For example, in the case where the pixel definition layer includes a third definition layer, a first definition layer, and a second definition layer arranged in a stacked manner, the third definition layer can be formed by a single patterning process, and then the first definition layer can be formed by another patterning process, and finally the second definition layer can be formed by another patterning process. Here, the single patterning process may include: photoresist coating, exposure, development, etching, and photoresist stripping.

[0124] In summary, the display panel provided by the embodiment of the present application includes: a driving backplane, a first electrode, a pixel definition layer, an organic light-emitting layer and a second electrode layer. Among them, the pixel definition layer can have multiple pixel openings and partition grooves, and the pixel openings and the partition grooves can sequentially penetrate the second definition layer and the first definition layer in the pixel definition layer. For any pixel opening, the second definition layer used to enclose this pixel opening is flush with the side facing the driving backplane, so that the inscribed height of the partition groove distributed on one side of this pixel opening is the same as the inscribed height of the partition groove distributed on the other side of this pixel opening. To this end, it can be ensured that the partition groove distributed on one side of any pixel opening has the same partition effect on the organic light-emitting layer as the partition groove on the other side of this pixel opening. That is, the partition grooves distributed around any pixel opening have the same partition effect on the lateral leakage current generated in the organic light-emitting layer, thereby ensuring a better display effect of the display panel.

[0125] The present application also provides a display device. This display device can be any product or component with a display function, such as an AR / VR device, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, or a navigation system. The display device can include a driver chip and a display substrate. The display substrate can be a silicon-based OLED display substrate.

[0126] In the embodiment of the present application, the display substrate may be the display substrate in the above embodiment. For example, it may be Figures 2 to 14 The display substrate is connected to a driving chip, which provides electrical signals to the display substrate so that the display substrate can display images.

[0127] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0128] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0129] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: A driving backplane (100), a first electrode layer (200), a pixel definition layer (300), an organic light-emitting layer (400), and a second electrode layer (500); The first electrode layer (200) is located on one side of the driving backplane (100), the first electrode layer (200) has a plurality of first electrodes (210) that are separately arranged, and the first electrodes (210) are electrically connected to the driving backplane (100); the driving backplane (100) has a groove (O) on one side facing the first electrode layer (200), the groove (O) is distributed between orthographic projections of two adjacent first electrodes (210) on the driving backplane (100), and the groove (O) includes at least two first sub-grooves (O1) and second sub-grooves (O2) distributed in different areas, and the depth of the first sub-grooves (O1) is greater than the depth of the second sub-grooves (O2); The pixel definition layer (300) is located on a side of the first electrode layer (200) away from the driving backplane (100), and the pixel definition layer (300) comprises: a first definition layer (310) and a second definition layer (320) stacked in a direction perpendicular to and away from the driving backplane (100), and the pixel definition layer (300) has a pixel opening (K) and a partition groove (U) that sequentially penetrate the second definition layer (320) and the first definition layer (310); The organic light-emitting layer (400) is located on a side of the pixel definition layer (300) facing away from the driving backplane (100); The second electrode layer (500) is located on a side of the organic light-emitting layer (400) facing away from the driving backplane (100); The distance between the side of the first definition layer (310) facing away from the driving back plate (100) and the bottom surface of the first sub-groove (O1) is greater than the distance between the side of the first definition layer (310) facing away from the driving back plate (100) and the bottom surface of the second sub-groove (O2).

2. The display panel according to claim 1, wherein: The side of the first definition layer (310) used to enclose the pixel opening (K) facing away from the driving backplane (100) is flush, and the side of the first definition layer (310) facing away from the driving backplane (100) is a plane parallel to the driving backplane (100).

3. The display panel according to claim 2, wherein: The first definition layer (310) comprises: a first portion (311) and a second portion (312) connected to each other, wherein an orthographic projection of the first portion (311) on the driving backplate (100) is located within the region where the groove (O) is located, and an orthographic projection of the second portion (312) on the driving backplate (100) is located within an orthographic projection of the first electrode layer (200) on the driving backplate (100); Wherein, in a direction perpendicular to the driving back plate (100), the thickness of the first portion (311) is greater than the thickness of the second portion (312).

4. The display panel according to claim 2, wherein: The pixel definition layer (300) further comprises: a third definition layer (330), the third definition layer (330) being located on a side of the first definition layer (310) facing the driving backplane (100), the pixel opening (K) and the partition groove (U) also passing through the third definition layer (330), and a side of the third definition layer (330) facing away from the driving backplane (100) being a plane parallel to the driving backplane (100), and in a direction perpendicular to the driving backplane (100), the thickness at each position in the first definition layer (310) is the same.

5. The display panel according to claim 4, wherein: The third definition layer (330) comprises: a third portion (331) and a fourth portion (332) connected to each other, wherein an orthographic projection of the third portion (331) on the driving backplate (100) is located within the region where the groove (O) is located, and an orthographic projection of the fourth portion (332) on the driving backplate (100) is located within an orthographic projection of the first electrode layer (200) on the driving backplate (100); Wherein, in a direction perpendicular to the driving back plate (100), the thickness of the third portion (331) is greater than the thickness of the fourth portion (332).

6. The display panel according to any one of claims 1 to 5, characterized in that: The display panel further comprises: a filling layer (600), the filling layer (600) being located on a side of the driving backplane (100) where the first electrode layer (200) is provided, and being distributed between two adjacent first electrodes (210), and a portion of the filling layer (600) facing the driving backplane (100) being located within the groove (O); The maximum distance between the driving backplane (100) and the side of the filling layer (600) facing away from the driving backplane (100) is less than or equal to the distance between the driving backplane (100) and the side of the first electrode layer (200) facing away from the driving backplane (100).

7. The display panel according to claim 6, wherein: The driving backplane (100) has an insulating layer (110) on a side facing the first electrode layer (200), and the insulating layer (110) has the groove (O) and a plurality of through holes (G) corresponding one-to-one to the plurality of first electrodes (210), and the first electrodes (210) are electrically connected to the driving backplane (100) through the corresponding through holes (G).

8. The display panel according to claim 1, wherein: The display panel further comprises: a filling layer (600), the filling layer (600) being located on a side of the driving backplane (100) where the first electrode layer (200) is provided, and being distributed between two adjacent first electrodes (210), and a portion of the filling layer (600) facing the driving backplane (100) being located within the groove (O); The side of the filling layer (600) facing away from the driving backplane (100) is parallel to the plane of the driving backplane (100), the distance between the side of the filling layer (600) facing away from the driving backplane (100) and the driving backplane (100) is greater than the distance between the side of the first electrode layer (200) facing away from the driving backplane (100) and the driving backplane (100), and the filling layer (600) covers the edge portion of the first electrode (210).

9. The display panel according to claim 8, wherein: The orthographic projection of the pixel definition layer (300) on the driving backplane (100) is located within the orthographic projection of the filling layer (600) on the driving backplane (100), and the outer boundary of the orthographic projection of the pixel definition layer (300) on the driving backplane (100) does not overlap with the outer boundary of the orthographic projection of the filling layer (600) on the driving backplane (100).

10. The display panel according to claim 8, wherein In a direction perpendicular to the driving back plate (100), the thickness of each position in the first definition layer (310) is the same.

11. The display panel according to any one of claims 1-5, 7-10, characterized in that: The thickness of each position in the second definition layer (320) is the same.

12. The display panel according to any one of claims 1-5, 7-10, characterized in that: The pixel definition layer (300) further comprises: a third definition layer (330), the third definition layer (330) being located on a side of the first definition layer (310) facing the driving backplane (100), and the pixel opening (K) and the partition groove (U) also passing through the third definition layer (330); The side of the third definition layer (330) facing away from the partition groove (U) protrudes outward relative to the side of the first definition layer (310) facing away from the partition groove (U); the side of the first definition layer (310) facing away from the partition groove (U) protrudes outward relative to the side of the second definition layer (320) facing away from the partition groove (U), or the side of the first definition layer (310) facing away from the partition groove (U) is flush with the side of the second definition layer (320) facing away from the partition groove (U).

13. The display panel according to any one of claims 1-5, 7-10, characterized in that: The pixel definition layer (300) further comprises: a third definition layer (330), the third definition layer (330) being located on a side of the first definition layer (310) facing the driving backplane (100), and the pixel opening (K) and the partition groove (U) also passing through the third definition layer (330); The side of the third definition layer (330) close to the partition groove (U) protrudes outward relative to the side of the first definition layer (310) close to the partition groove (U), and the side of the second definition layer (320) close to the partition groove (U) protrudes outward relative to the side of the first definition layer (310) close to the partition groove (U).

14. The display panel according to claim 13, wherein: The first definition layer (310) comprises an arc-shaped concave surface on one side close to the partition groove (U); Alternatively, a side of the first definition layer (310) close to the partition groove (U) includes an inclined surface (X), and an angle between the inclined surface (X) and a side of the first definition layer (310) facing the third definition layer (330) is an acute angle; Alternatively, a side of the first definition layer (310) close to the partition groove (U) includes a first inclined surface (X1) and a second inclined surface (X2), the first inclined surface (X1) is closer to the driving back plate (100) than the second inclined surface (X2), and an angle between the first inclined surface (X1) and a side of the first definition layer (310) facing the third definition layer (330) is an acute angle, and an angle between the second inclined surface (X2) and a side of the first definition layer (310) facing the second definition layer (320) is an acute angle.

15. A display device, characterized in that: include: A driving chip and a display panel, wherein the display panel is the display panel according to any one of claims 1 to 14, and the driving chip is used to apply a driving signal to the display panel.

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