Display panel and display device

Abstract

The present application belongs to the technical field of display. Disclosed are a display panel and a manufacturing method therefor, and a display device. The display panel comprises a drive backplane, first electrodes, a filling layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer. The pixel definition layer has a plurality of pixel openings, and sidewalls of the pixel openings have concave structures. Since the flatness of the side of the filling layer facing away from the drive backplane is relatively high, the concave structures are distributed on the side of the filling layer facing away from the drive backplane to ensure that the distribution positions of the concave structures are basically consistent, thereby ensuring that the partition effects of the concave structures on the organic light-emitting layer are basically consistent. In this way, at least part of the orthographic projection of each concave structure on the drive backplane does not coincide with the orthographic projection of a first electrode on the drive backplane. Thus, the regions of the first electrodes covered by the concave structures are relatively small, such that the connection area between the first electrodes and the organic light-emitting layer is increased, thereby effectively increasing the aperture ratio of the display panel and making the display effect of the display panel relatively good.

Description

Display panel and display device

[0001] This application claims priority to Chinese Patent Application No. 202411517348.8, filed on October 28, 2024, entitled “Display Panel and Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0003] Organic light-emitting diode (OLED) display panels are widely used in the display field due to their advantages such as thinness, self-illumination, high resolution, and fast response speed.

[0004] OLED display panels generally include a driving backplane and multiple light-emitting devices (LEDs) located on the driving backplane. Each LED comprises an anode, an emissive layer, and a cathode layer stacked along a direction away from the driving backplane. The emissive layers in each LED are uniformly deposited using a vapor deposition process; that is, the emissive layers in each LED are interconnected. To prevent lateral leakage current generated by the emissive layer of a particular LED from causing adjacent LEDs to emit light during illumination, pixel definition layers are needed between adjacent LEDs. These pixel definition layers can be configured with a recessed structure on the side closest to the LED to block lateral leakage current.

[0005] However, to ensure the concave structure of the pixel definition layer effectively blocks the light-emitting layer, this portion of the pixel definition layer with the concave structure needs to be fabricated above the relatively flat and uniform anode. Therefore, the portion of the pixel definition layer with the concave structure covers the edge of the anode, resulting in a smaller aperture ratio in the OLED display panel, and consequently, a poorer display effect. Summary of the Invention

[0006] This application provides a display panel and a display device thereof. It can solve the problem of poor display effect in existing OLED display panels. The technical solution is as follows:

[0007] On the one hand, a display panel is provided, including: a driving backplane, a first electrode layer, a filling layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer;

[0008] The first electrode layer is located on one side of the drive back plate, and the first electrode layer has a plurality of separately disposed first electrodes, which are electrically connected to the drive back plate.

[0009] The filling layer is located on the side of the drive backplate where the first electrode layer is disposed, and is distributed between two adjacent first electrodes;

[0010] The pixel definition layer is located on the side of the filling layer opposite to the driving backplate, and the pixel definition layer has multiple pixel openings, the sidewalls of the pixel openings have a concave structure;

[0011] The organic light-emitting layer is located on the side of the pixel definition layer opposite to the driving backplate;

[0012] The second electrode layer is located on the side of the organic light-emitting layer opposite to the driving backplate;

[0013] Wherein, the distance between the side of the filling layer away from the driving backplate and the driving backplate is greater than or equal to the distance between the side of the first electrode layer away from the driving backplate and the driving backplate; the orthographic projection of the concave structure on the driving backplate overlaps with the orthographic projection of the filling layer on the driving backplate, and the orthographic projection of the concave structure on the driving backplate is at least outside the orthographic projection of the first electrode on the driving backplate.

[0014] Optionally, the drive backplate has a groove on the side facing the first electrode layer. The groove is distributed between the orthographic projections of two adjacent first electrodes on the drive backplate, and the groove includes at least two first sub-grooves and second sub-grooves distributed in different regions. The depth of the first sub-grooves is greater than the depth of the second sub-grooves.

[0015] The distance between the side of the filling layer away from the drive back plate and the bottom surface of the first sub-groove is greater than the distance between the side of the filling layer away from the drive back plate and the bottom surface of the second sub-groove.

[0016] Optionally, for any one of the first electrodes, the side of the filling layer distributed around the first electrode that is opposite to the driving backplate is flush, and the side of the filling layer that is opposite to the driving backplate is a plane parallel to the driving backplate.

[0017] Optionally, the orthographic projection of the concave structure on the drive back plate does not coincide with the orthographic projection of the first electrode on the drive back plate.

[0018] Optionally, if the distance between the side of the filling layer away from the driving backplate and the driving backplate is greater than the distance between the side of the first electrode layer away from the driving backplate and the driving backplate, the filling layer covers the edge portion of the first electrode, and the orthographic projection of the pixel definition layer on the driving backplate is located within the orthographic projection of the filling layer on the driving backplate.

[0019] Optionally, the outer boundary of the orthographic projection of the pixel definition layer on the driving backplane does not coincide with the outer boundary of the orthographic projection of the filling layer on the driving backplane.

[0020] Optionally, the orthographic projection of the pixel definition layer on the driving backplane does not coincide with the orthographic projection of the first electrode on the driving backplane.

[0021] Optionally, the drive backplate has an insulating layer on the side facing the first electrode layer. The insulating layer has the groove and a plurality of through holes corresponding to the plurality of first electrodes. The first electrodes are electrically connected to the drive backplate through the corresponding through holes.

[0022] Optionally, the pixel definition layer includes a first definition layer and a second definition layer stacked along a direction perpendicular to and away from the driving substrate, and the pixel opening passes through the second definition layer and the first definition layer in sequence;

[0023] Wherein, the orthographic projection of the first defining layer on the drive backplane is located within the orthographic projection of the second defining layer on the drive backplane, and the outer boundary of the orthographic projection of the first defining layer on the drive backplane does not coincide with the outer boundary of the orthographic projection of the second defining layer on the drive backplane.

[0024] Optionally, the side of the first defining layer facing away from the drive backplate and the side of the second defining layer facing away from the drive backplate are both planes parallel to the drive backplate.

[0025] Optionally, the pixel definition layer further includes a third definition layer, which is located on the side of the first definition layer facing the driving backplate, and the pixel opening also penetrates the third definition layer;

[0026] Wherein, the orthographic projection of the first defining layer on the drive backplane is located within the orthographic projection of the third defining layer on the drive backplane, and the outer boundary of the orthographic projection of the first defining layer on the drive backplane does not coincide with the outer boundary of the orthographic projection of the third defining layer on the drive backplane.

[0027] Optionally, the orthographic projection of the third defining layer on the drive backplane does not coincide with the orthographic projection of the first electrode on the drive backplane.

[0028] Optionally, in a direction parallel to the drive backplate, the width of the portion of the third defining layer that protrudes outward relative to the first defining layer is greater than or equal to the width of the portion of the second defining layer that protrudes outward relative to the first defining layer.

[0029] Optionally, the side of the third defining layer facing away from the drive backplate is a plane parallel to the drive backplate.

[0030] On the other hand, a display device is provided, comprising: a driver chip and a display panel, wherein the display panel is any of the display panels described above, and the driver chip is used to apply a driving signal to the display panel.

[0031] The beneficial effects of the technical solutions provided in this application include at least the following:

[0032] The display panel includes: a driving backplate, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer. The pixel definition layer has multiple pixel openings, and the sidewalls of the pixel openings have concave structures. The distance between the side of the filling layer facing away from the driving backplate and the driving backplate is greater than or equal to the distance between the side of the first electrode layer facing away from the driving backplate and the driving backplate, ensuring relatively high flatness on the side of the filling layer facing away from the driving backplate. Therefore, distributing the concave structures on the side of the filling layer facing away from the driving backplate ensures that the distribution positions of the concave structures on the sidewalls of each pixel opening are basically consistent, thus ensuring that the isolation effect of the concave structures on the sidewalls of each pixel opening on the organic light-emitting layer is basically consistent. In this way, at least a portion of the orthographic projection of the concave structure onto the driving backplate may not coincide with the orthographic projection of the first electrode onto the driving backplate; that is, at least a portion of the orthographic projection of the concave structure onto the driving backplate is located outside the orthographic projection of the first electrode onto the driving backplate. Thus, the area covered by the concave structure on the sidewall of the pixel aperture in the first electrode is small, which increases the connection area between the first electrode and the organic light-emitting layer, effectively improving the aperture ratio of the display panel and thus making the display panel display better. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 is a schematic diagram of a partial structure of a display panel;

[0035] Figure 2 is a top view of a display panel provided in an embodiment of this application;

[0036] Figure 3 is a cross-sectional view of the display panel shown in Figure 2 at point A-A';

[0037] Figure 4 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of this application;

[0038] Figure 5 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of this application;

[0039] Figure 6 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of this application;

[0040] Figure 7 is a schematic diagram of forming photoresist on one side of an insulating layer according to an embodiment of this application;

[0041] Figure 8 is a schematic diagram of a patterned photoresist provided in an embodiment of this application;

[0042] Figure 9 is a schematic diagram of forming a first electrode on one side of a patterned photoresist according to an embodiment of this application;

[0043] Figure 10 is a schematic diagram of a stripping patterned photoresist according to an embodiment of this application;

[0044] Figure 11 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of this application;

[0045] Figure 12 is a partial cross-sectional schematic diagram of a display panel provided in another embodiment of this application;

[0046] Figure 13 is a partial cross-sectional schematic diagram of another display panel provided in another embodiment of this application. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0049] In related technologies, a silicon-based OLED display panel may include a driving backplane and multiple 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 stacked hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer. When the light-emitting layer is composed of multiple stacked sub-light-emitting layers, the sub-light-emitting layers are connected in series through a charge generation layer. Thus, the color of the light emitted by the light-emitting layer is determined by the multiple sub-light-emitting layers. For example, if the light-emitting layer needs to emit white light, sub-light-emitting layers capable of emitting red, green, and blue light can be stacked to make the light-emitting layer emit white light. Alternatively, sub-light-emitting layers capable of emitting yellow and blue light can be stacked to make the light-emitting layer emit white light.

[0050] 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 and second electrodes. Thus, the hole injection layer can inject holes into the hole transport layer, which then transports them to the luminescent material layer. Similarly, the electron injection layer can inject electrons into the electron transport layer, which also transports them to the luminescent material layer. Holes and electrons combine within the luminescent material layer to form high-energy excitons. These high-energy excitons are unstable and easily transition to low-energy excitons, releasing energy and generating photons that emit light within a specific wavelength range. When the luminescent layer consists of multiple sub-emitting layers, the charge generation layer is typically made of a material with good conductivity to ensure that each sub-emitting layer can emit light, thereby improving the luminescence effect of the luminescent layer.

[0051] Since the light-emitting layers in each light-emitting device are uniformly deposited using a vapor deposition process, they are interconnected. To prevent lateral leakage current generated by the charge generation layer in one light-emitting device from causing adjacent devices to emit light during illumination, a pixel definition layer is required between adjacent devices. A groove is provided on the side of the pixel definition layer to isolate the charge generation layer, thereby preventing lateral leakage current. A filler layer is also provided on the side of the pixel definition layer near the driving backplane to reduce the overall discontinuity of the pixel definition layer.

[0052] During the fabrication of a display panel, to ensure that two adjacent first electrodes do not connect, the etching time is typically increased to remove all portions distributed between the two adjacent first electrodes. However, this also increases the risk of over-etching. Typically, because the concentration of the etching solution varies across different areas of the display panel, over-etching can result in varying over-etch depths in different areas.

[0053] Therefore, as shown in Figure 1, during the formation of the first electrode layer 200 in the display panel 000, after over-etching the portion between two adjacent first electrodes 210, the insulating layer 110 on the side of the driving backplate 100 facing the first electrode layer 200 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 varies in different areas during the over-etching process, the depth of the groove O formed on the insulating layer 110 in different areas is different. Furthermore, since the filling layer 300 formed between two adjacent first electrodes 210 on the side facing away from the driving backplate 100 usually does not protrude beyond the side of the first electrode layer 200 facing away from the driving backplate 100, the distance between the side of the filling layer 300 facing away from the driving backplate 100 and the side of the first electrode layer 200 facing away from the driving backplate 100 in different areas will be different.

[0054] Typically, to ensure a good effect of the recessed structure N in the pixel definition layer 400 in isolating the light-emitting layer, this portion of the pixel definition layer 400 with the recessed structure N needs to be fabricated above the relatively flat and uniform first electrode 210. Therefore, the portion of the pixel definition layer 400 with the recessed structure N covers the edge portion of the first electrode 210; that is, the orthographic projection of the recessed structure N on the driving backplate 100 lies within the orthographic projection of the first electrode 210 on the driving backplate 100. In this case, the distribution of the recessed structures N on the sidewalls of each pixel opening K in the pixel definition layer 400 is the same to ensure that the isolation effect of the recessed structures N on the sidewalls of each pixel opening K on the organic light-emitting layer 500 is consistent. However, after the edge portion of the first electrode 210 is covered by the recessed structure N of the pixel definition layer 400, the area connecting the first electrode 210 and the organic light-emitting layer 500 is reduced, resulting in a smaller aperture ratio of the display panel, which affects the display effect of the display panel 000.

[0055] It should be noted that the aperture ratio of the display panel refers to the ratio of the area where the first electrode 210 is connected to the organic light-emitting layer 500 to the area of ​​the orthographic projection of the first electrode 210 onto the driving backplate 100. Because the portion of the organic light-emitting layer 500 connected to the first electrode 210 can emit light after a voltage is applied to the first electrode 210, the size of the area of ​​the portion where the first electrode 210 is connected to the organic light-emitting layer 500 affects the display effect of the display panel.

[0056] To address the aforementioned technical problems, this application provides a display panel. Please refer to Figures 2 and 3. Figure 2 is a top view of a display panel provided in this application, and Figure 3 is a cross-sectional view of the display panel shown in Figure 2 at point A-A'. The display panel 000 may include: a driving backplate 100, a first electrode layer 200, a filling layer 300, a pixel definition layer 400, an organic light-emitting layer 500, and a second electrode layer 600.

[0057] The first electrode layer 200 in the display panel 000 is located on one side of the drive back plate 100. The first electrode layer 200 has a plurality of separately arranged first electrodes 210, and the first electrodes 210 are electrically connected to the drive back plate 200.

[0058] The filling layer 300 in the display panel 000 is located on the side of the drive back plate 100 where the first electrode layer 200 is disposed, and is distributed between two adjacent first electrodes 210.

[0059] The pixel definition layer 400 in the display panel 000 is located on the side of the filling layer 300 away from the driving back plate 100. The pixel definition layer 400 has a plurality of pixel openings K corresponding one-to-one with a plurality of first electrodes 210. The orthographic projection of the pixel opening K on the driving back plate 100 is located within the orthographic projection of the corresponding first electrode 210 on the driving back plate 100, and the sidewall of the pixel opening K has a concave structure N, that is, the pixel definition layer 400 has a concave structure N.

[0060] The organic light-emitting layer 500 in the display panel 000 is located on the side of the pixel definition layer 400 away from the driving backplate 100. The organic light-emitting layer 400 can be composed of multiple layers of organic material stacked together, and these organic material layers can 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 along a direction perpendicular to and away from the driving backplate 100. In the case where the multiple organic material layers include multiple sub-light-emitting layers, the individual sub-light-emitting layers are connected in series through a charge generation layer. The recessed structure N can isolate at least a portion of the organic material layers in the organic light-emitting layer 500. For example, the recessed structure N 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 recessed structure N.

[0061] The second electrode layer 600 in the display panel 000 is located on the side of the organic light-emitting layer 500 away from the driving backplate 100.

[0062] It should be noted that the portion of the organic light-emitting layer 500 distributed within each pixel opening K can 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 500 and the second electrode layer 600 distributed within this pixel opening K can form a light-emitting device.

[0063] It should also be noted that, in order to ensure a good effect of the concave structure N in blocking lateral leakage current, the concave structure N on the sidewall of each pixel aperture K can be ring-shaped. That is, for any pixel aperture K, a ring of concave structure N will be set on the sidewall of this pixel aperture K, thereby ensuring that the lateral leakage current generated in any direction during the light emission process of a certain light-emitting device will be blocked by the ring of concave structure N on the sidewall of the pixel aperture K where the light-emitting device is located.

[0064] In this application, the distance between the side of the filling layer 300 away from the driving backplate 100 and the driving backplate 100 is greater than or equal to the distance between the side of the first electrode layer 200 away from the driving backplate 100 and the driving backplate 100.

[0065] Here, when the distance between the side of the filling layer 300 facing away from the drive backplate 100 and the drive backplate 100 is equal to the distance between the side of the first electrode layer 200 facing away from the drive backplate 100 and the drive backplate 100, the side of the filling layer 300 facing away from the drive backplate can be flush with the side of the first electrode layer 400 facing away from the drive backplate 100. When the distance between the side of the filling layer 300 facing away from the drive backplate 100 and the drive backplate 100 is greater than the distance between the side of the first electrode layer 200 facing away from the drive backplate 100 and the drive backplate 100, the side of the filling layer 300 facing away from the drive backplate can protrude beyond the side of the first electrode layer 400 facing away from the drive backplate 100.

[0066] To more clearly see the shape of the recessed structure N on the sidewall of 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 this application. The display panel shown in Figure 4 does not show the organic light-emitting layer 400 and the second electrode layer 500. When the distance between the side of the filling layer 300 facing away from the driving back plate 100 and the driving back plate 100 is greater 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, the flatness of the side of the filling layer 300 facing away from the driving back plate 100 can be relatively high. Therefore, even if the concave structures N on the sidewalls of the pixel openings K are distributed on the side of the filling layer 300 away from the driving backplate 100, that is, the orthographic projection of the concave structures N on the driving backplate 100 overlaps with the orthographic projection of the filling layer 300 on the driving backplate 100, it can still be ensured that the distribution positions of the concave structures N on the sidewalls of each pixel opening K are basically consistent, so as to ensure that the blocking effect of the concave structures N on the sidewalls of each pixel opening K on the organic light-emitting layer 500 is basically consistent. In this way, at least a portion of the orthographic projection of the concave structures N on the driving backplate 100 can not coincide with the orthographic projection of the first electrode 210 on the driving backplate 100, that is, at least a portion of the orthographic projection of the concave structures N on the driving backplate 100 is located outside the orthographic projection of the first electrode 210 on the driving backplate 100. Thus, the area covered by the concave structure N on the sidewall of the pixel opening K in the first electrode 210 is small, which increases the connection area between the first electrode 210 and the organic light-emitting layer 500, effectively improving the aperture ratio of the display panel 000, thereby making the display panel 000 display better.

[0067] In summary, the display panel provided in this application includes: a driving backplate, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer. The pixel definition layer has multiple pixel openings, and the sidewalls of the pixel openings have concave structures. The distance between the side of the filling layer facing away from the driving backplate and the driving backplate is greater than or equal to the distance between the side of the first electrode layer facing away from the driving backplate and the driving backplate, ensuring relatively high flatness on the side of the filling layer facing away from the driving backplate. Therefore, distributing the concave structures on the side of the filling layer facing away from the driving backplate ensures that the distribution positions of the concave structures on the sidewalls of each pixel opening are basically consistent, thus ensuring that the isolation effect of the concave structures on the sidewalls of each pixel opening on the organic light-emitting layer is basically consistent. In this way, at least a portion of the orthographic projection of the concave structure on the driving backplate may not coincide with the orthographic projection of the first electrode on the driving backplate; that is, at least a portion of the orthographic projection of the concave structure on the driving backplate is located outside the orthographic projection of the first electrode on the driving backplate. Thus, the area covered by the concave structure on the sidewall of the pixel aperture in the first electrode is small, which increases the connection area between the first electrode and the organic light-emitting layer, effectively improving the aperture ratio of the display panel and thus making the display panel display better.

[0068] In this application, the driving backplate 100 has a groove O on the side facing the first electrode layer 200, and the filling layer 300 on the side facing the driving backplate 100 can be located within the groove O. The groove O is distributed between the orthographic projections of two adjacent first electrodes 210 on the driving backplate 100, and the groove O includes at least two first sub-grooves O1 and second sub-grooves O2 distributed in different regions, wherein the depth of the first sub-grooves O1 is greater than the depth of the second sub-grooves O2.

[0069] For example, as shown in Figure 4, due to the different concentrations of the etching solution distributed in different areas during the over-etching process, the depths of the first sub-groove O1 distributed on one side of the first electrode 210 and the second sub-groove O2 distributed on the other side of the first electrode 210 are different, with the depth d1 of the first sub-groove O1 being greater than the depth d2 of the second sub-groove O2. In this case, the distance D1 between the side of the filling layer 300 away from the driving backplate 100 and the bottom surface of the first sub-groove O1 can be greater than the distance D2 between the side of the filling layer 300 away from the driving backplate 100 and the bottom surface of the second sub-groove O2.

[0070] For example, for any first electrode 210, the side of the filling layer 300 distributed around the first electrode 210 that faces away from the driving backplate 100 is flush, and the side of the filling layer 300 facing away from the driving backplate 100 is a plane parallel to the driving backplate 100. In this case, the flatness of the side of the filling layer 300 facing away from the driving backplate 100 can be further improved, so that even if the orthographic projection of the concave structure N on the sidewall of each pixel opening K exceeds the outer boundary of the orthographic projection of the corresponding first electrode 210 on the driving backplate 100, the distribution position of the concave structure N on the sidewall of each pixel opening K can be completely consistent, thereby ensuring that the isolation effect of the concave structure N on the sidewall of each pixel opening K on the organic light-emitting layer 500 is basically consistent.

[0071] In this application, when the distance between the side of the filling layer 300 away from the driving back plate 100 and the driving back plate 100 is equal to the distance between the side of the first electrode layer 200 away from the driving back plate 100 and the driving back plate 100, that is, when the side of the filling layer 300 away from the driving back plate 100 and the side of the first electrode layer 200 away from the driving back plate are flush, the pixel definition layer 400 needs to cover the edge portion of each first electrode 210 to avoid the etching marks generated at the edge of the first electrode 210 after etching process from interfering with the normal light emission of the light-emitting device 200.

[0072] In this case, a portion of the orthographic projection of the recessed structure N of the pixel definition layer 400 onto the driving back plate 100 may be located within the orthographic projection of the first electrode 210 onto the driving back plate 100; another portion may be located outside the orthographic projection of the first electrode 210 onto the driving back plate 100, and may be located within the orthographic projection of the filling layer 300 onto the driving back plate 100.

[0073] In this application, when the distance between the side of the filling layer 300 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, that is, when the side of the filling layer 300 facing away from the driving back plate 100 protrudes beyond the side of the first electrode layer 200 facing away from the driving back plate, in order to ensure that the step difference inside the pixel definition layer 400 is small, the orthographic projection of the pixel definition layer 400 on the driving back plate 100 needs to be located within the orthographic projection of the filling layer 300 on the driving back plate 100.

[0074] In this case, a filling layer 300 is needed to cover the edge portions of each first electrode 210. That is, the filling layer 300 can cover the edge portions of the first electrode 210 to prevent the etching marks generated at the edges of the first electrode 210 after etching from interfering with the normal light emission of the light-emitting device.

[0075] Here, to further increase the aperture ratio of the display panel 000, the orthographic projection of the pixel definition layer 400 on the driving backplate 100 can be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplate 100. That is, the orthographic projection of the pixel definition layer 400 on the driving backplate 100 is entirely distributed within the area where the groove O is located. In this case, the orthographic projection of the concave structure N of the pixel definition layer 400 on the driving backplate 100 is entirely distributed within the area where the groove O is located; that is, the orthographic projection of the concave structure N on the driving backplate 100 can be located outside the orthographic projection of the first electrode 210 on the driving backplate 100. In this way, while ensuring that this portion of the pixel definition layer 400 with the concave structure N is located on the filling layer 300 with higher flatness, the width of the first electrode 210 covered by the filling layer 300 can be reduced, thereby increasing the aperture ratio of the first electrode 210 and resulting in a better display effect for the display panel 000. For example, the width of the edge portion of the first electrode 210 covered by the filling layer 300 is less than or equal to 0.4 micrometers.

[0076] In this embodiment, to ensure that the recessed structure N in the pixel definition layer 400 has a certain isolation effect, the pixel definition layer 400 may be composed of two or more layers of inorganic insulating layers. For example, the pixel definition layer 400 in the display panel 000 may include two or three layers of inorganic insulating layers. Of course, it may also include more layers of inorganic insulating layers, and this embodiment does not limit this.

[0077] When the pixel definition layer 400 includes two inorganic insulating layers, as shown in FIG5, FIG5 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application. The two inorganic insulating layers can be a first definition layer 410 and a second definition layer 420, respectively. The second definition layer 420 can be located on the side of the first definition layer 410 away from the driving back plate 100. That is, the pixel definition layer 400 can include a first definition layer 410 and a second definition layer 420 stacked along a direction perpendicular to and away from the driving substrate 100, and the pixel opening K sequentially penetrates the second definition layer 420 and the first definition layer 410. Wherein, the orthographic projection of the first definition layer 410 on the driving back plate 100 is located within the orthographic projection of the second definition layer 420 on the driving back plate 100, and the outer boundary of the orthographic projection of the first definition layer 410 on the driving back plate 100 does not coincide with the outer boundary of the orthographic projection of the second definition layer 420 on the driving back plate 100. That is, in the direction parallel to the drive backplate 100, the second defining layer 420 protrudes outward relative to the first defining layer 410, and the width of the portion of the second defining layer 420 protruding outward relative to the first defining layer 410 is greater than or equal to 0.05 micrometers.

[0078] Here, in the direction parallel to the driving backplate 100, the portion of the second defining layer 420 that protrudes outward relative to the first defining layer 410, together with the side of the first defining layer 410 facing the pixel opening K, can form a concave structure N. Furthermore, when the width of the portion of the second defining layer 420 that protrudes outward relative to the first defining layer 410 is greater than or equal to 0.05 micrometers, the concave structure N can possess good lateral leakage current capability.

[0079] Since the side of the filling layer 300 facing away from the driving backplate 100 is a plane parallel to the driving backplate 100, and the orthographic projection of the pixel definition layer 400 onto the driving backplate 100 lies within the orthographic projection of the filling layer 300 onto the driving backplate 100, after the pixel definition layer 400 is formed on the side of the filling layer 300 facing away from the driving backplate 100, it can be ensured that the side of the first definition layer 410 facing away from the driving backplate 100 and the side of the second definition layer 420 facing away from the driving backplate 100 are both planes parallel to the driving backplate 100. Therefore, in the direction perpendicular to the driving backplate, the thickness at each position in the first definition layer 410 is the same, and the thickness at each position in the second definition layer 420 is the same. This ensures that the concave structure N of the pixel definition layer 400 effectively blocks the organic light-emitting layer 500.

[0080] Furthermore, when the pixel definition layer 400 only includes the first definition layer 410 and the second definition layer 420, the portion of the second electrode layer 600 located within the pixel opening K is relatively flat, so as to ensure that the overall step difference of the portion of the second electrode layer 600 distributed within the pixel opening K is relatively small, thereby reducing the probability of the second electrode layer 600 being disconnected.

[0081] When the pixel definition layer 400 includes three inorganic insulating layers, please refer to Figure 6. Figure 6 is a partial cross-sectional schematic diagram of another display panel provided in this application embodiment. These three inorganic insulating layers can be: a first definition layer 410, a second definition layer 420, and a third definition layer 430. The third definition layer 430 is located on the side of the first definition layer 410 facing the driving back plate 100, and the pixel opening K also penetrates through the third definition layer 430. The orthographic projection of the first definition layer 410 on the driving back plate 100 is located within the orthographic projection of the third definition layer 430 on the driving back plate 100, and the outer boundary of the orthographic projection of the first definition layer 410 on the driving back plate 100 does not coincide with the outer boundary of the orthographic projection of the third definition layer 430 on the driving back plate 100. That is, in the direction parallel to the drive backplane 100, the second defining layer 420 protrudes outward relative to the first defining layer 410, and the width of the portion of the second defining layer 420 protruding outward relative to the first defining layer 410 is greater than or equal to 0.05 micrometers; the third defining layer 430 protrudes outward relative to the first defining layer 410, and the width of the portion of the third defining layer 430 protruding outward relative to the first defining layer 410 is greater than or equal to 0.05 micrometers. Furthermore, in the direction parallel to the drive backplane 100, the width of the portion of the third defining layer 430 protruding outward relative to the first defining layer 410 is greater than or equal to the width of the portion of the second defining layer 420 protruding outward relative to the first defining layer 410.

[0082] Here, in a direction parallel to the drive backplane 100, the portion of the second defining layer 420 protruding outward relative to the first defining layer 410, the portion of the third defining layer 430 protruding outward relative to the first defining layer 410, and the side of the first defining layer 410 facing the pixel opening K can form a concave structure N. Furthermore, when the width of the portion of the second defining layer 420 protruding outward relative to the first defining layer 410 is greater than or equal to 0.05 micrometers, and the width of the portion of the third defining layer 430 protruding outward relative to the first defining layer 410 is greater than or equal to 0.05 micrometers, the concave structure N can possess good lateral leakage current capability.

[0083] It should be noted that, since the side of the filling layer 300 facing away from the driving backplate 100 is a plane parallel to the driving backplate 100, and the orthographic projection of the pixel definition layer 400 on the driving backplate 100 lies within the orthographic projection of the filling layer 300 on the driving backplate 100, after the pixel definition layer 400 is formed on the side of the filling layer 300 facing away from the driving backplate 100, it can be ensured that the side of the third definition layer 430 facing away from the driving backplate 100, the side of the first definition layer 410 facing away from the driving backplate 100, and the side of the second definition layer 420 facing away from the driving backplate 100 are all parallel to the plane of the driving backplate 100. Therefore, in the direction perpendicular to the driving backplate, the thickness of each position in the first definition layer 410 is the same, the thickness of each position in the third definition layer 430 is the same, and the thickness of each position in the second definition layer 420 is the same. This ensures that the recessed structures N within each pixel opening K in the pixel definition layer 400 are distributed in the same position, so that the effect of blocking lateral leakage current through the recessed structures N within each pixel opening K is the same.

[0084] It should also be noted that, as analyzed above, in order to further increase the aperture ratio of the display panel 000, the orthographic projection of the pixel definition layer 400 on the driving backplate 100 needs to be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplate 100. That is, the orthographic projection of the pixel definition layer 400 on the driving backplate 100 needs to be non-coincident with the first electrodes 210. Therefore, the orthographic projection of the third definition layer 430 in the pixel definition layer 400 on the driving backplate 100 does not coincide with the orthographic projection of the first electrodes 210 on the driving backplate 100. Furthermore, since the filling layer 300 needs to cover the edge portion of the first electrodes 210, the outer boundary of the orthographic projection of the pixel definition layer 400 on the driving backplate 100 does not coincide with the outer boundary of the orthographic projection of the filling layer 300 on the driving backplate 100.

[0085] Furthermore, since the outer boundary of the orthographic projection of the pixel definition layer 400 onto the driving backplate 100 does not coincide with the outer boundary of the orthographic projection of the filling layer 300 onto the driving backplate 100, the subsequent formation of the organic light-emitting layer 500 and the second electrode layer 600 on the side of the pixel definition layer 400 away from the driving backplate 100 ensures that the portions of the organic light-emitting layer 500 and the second electrode layer 600 distributed within the pixel opening K are relatively flat. This ensures that the overall step difference of the portions of the organic light-emitting layer 500 and the second electrode layer 600 distributed within the pixel opening K is relatively small, thereby making the thickness of the portion of the organic light-emitting layer 500 located in the central region of the pixel opening K approximately equal to the thickness located in the peripheral region of the pixel opening K. In this way, the uniformity of light emission from each light-emitting device in the display panel 000 can be guaranteed.

[0086] Optionally, as shown in Figures 5 and 6, each of the first electrodes 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 along a direction perpendicular to and away from the driving substrate 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 backplate 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 from the organic light-emitting layer 400 along the direction toward the driving backplate 100, so that the reflected light can be emitted in a direction away from the driving backplate 100, and the reflected light and the light emitted from the organic light-emitting layer 400 in the direction away from the driving backplate 100 can coherently interact, thereby generating a coherently enhanced microcavity effect and improving the light extraction 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 properties, which is beneficial to improving the electrical performance of the first electrode 210.

[0087] In this application, as shown in Figures 5 and 6, the drive backplate 100 has an insulating layer 110 on the side facing the first electrode layer 200. The insulating layer 110 has a plurality of through holes G corresponding one-to-one with the plurality of first electrodes 210, and each first electrode 210 can be electrically connected to the drive backplate 100 through the corresponding through hole G.

[0088] In this embodiment, when the side of the filling layer 300 facing away from the driving backplate 100 protrudes from the side of the first electrode layer 200 facing away from the driving backplate 100, there are various design methods to make the side of the filling layer 300 facing away from the driving backplate 100 a plane parallel to the driving backplate 100. This embodiment will be illustrated with the following two design methods as examples:

[0089] The first design method involves directly grinding the side of the filling layer 300 that faces away from the drive backplate 100.

[0090] For example, as shown in FIG4, due to over-etching issues during the fabrication of 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 300 in the display panel 000 may be located within this groove O. Here, the orthographic projection of the groove O of the insulating layer 110 onto the driving backplate 100 may be located between the orthographic projections of two adjacent first electrodes 210 onto the driving backplate 100. For example, the orthographic projection of the groove O onto the driving backplate 100 may surround the periphery of the orthographic projections of each first electrode 210 onto the driving backplate 100.

[0091] Furthermore, due to the varying concentrations of the etching solution distributed in different areas during the over-etching process, the depths of the grooves O formed on the insulating layer 110 in different areas differ. In this case, to ensure that the side of the filling layer 300 facing away from the driving backplate 100 is parallel to the plane of the driving backplate 100, the thickness of the filling layer 300 can be increased. That is, it is necessary to ensure that the side of the formed filling layer 300 facing away from the driving backplate 100 protrudes from the side of the first electrode layer 200 facing away from the driving backplate. The portion of the filling layer 300 protruding from the first electrode layer 200 can be ground flat, so that the side of the filling layer 300 facing away from the driving backplate 100 is parallel to the plane of the driving backplate 100. This allows a pixel definition layer 400 to be formed on the flat and uniform side of the filling layer 300 facing away from the driving backplate.

[0092] The second design improves the fabrication 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 a groove O. Under this premise, the side of the filling layer 300 facing away from the drive backplate 100 is then ground flat.

[0093] For example, as shown in FIG7, a photoresist film 700a is first coated on the side of the insulating layer 110 facing away from the driving backplate 100. Then, as shown in FIG8, 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 backplate 100 can surround the periphery of the orthographic projections of the subsequently formed light-emitting devices on the driving backplate. Afterwards, as shown in FIG9, a metal conductive film 200a is formed on the side of the photoresist pattern 700b facing away from the driving backplate 100. Here, a portion of the metal conductive film 200a is located on the side of the photoresist pattern 700b facing away from the driving backplate 100, and the orthographic projections of the other portions of the metal conductive film 200a on the driving backplate 100 do not coincide with the orthographic projections of the photoresist pattern 700a on the driving backplate 100. Finally, as shown in Figure 10, 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 backplate 100 is stripped along with the photoresist pattern 700b. This allows the non-overlapping portions of the metal conductive film 200a and the photoresist pattern 700a to be retained, ultimately forming the first electrode layer 200. In this case, there is no need to over-etch the first electrode layer 200, so that the side of the insulating layer 110 facing the first electrode 210 will no longer form a groove O. That is, the side of the insulating layer 110 facing the first electrode 210 can be a plane parallel to the driving backplate 100. This effectively improves the flatness of the subsequently formed film layer.

[0094] After fabricating the first electrode layer 200 using the process flow shown in Figures 7 to 10, and subsequently forming the fill layer 300 and pixel definition layer 400, the display panel shown in Figure 11 can be referred to. As shown in Figure 11, Figure 11 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of this application. Since the side of the insulating layer 110 facing the first electrode 210 no longer forms a groove O, the flatness of the fill layer 300 formed on the driving back plate 100 is relatively high. Thus, during the process of grinding the side of the fill layer 300 away from the driving back plate 100, the thickness of the portion of the fill layer 300 that is ground away can be kept relatively small, thereby simplifying the difficulty of grinding the fill layer 300.

[0095] In one possible implementation of this application, please refer to FIG12, which is a partial cross-sectional schematic diagram of a display panel provided in another embodiment of this application. The portion of the filling layer 300 covering the edge of the first electrode 210 has a slope on the side near the pixel opening K, and the angle between the slope and the side of the filling layer 300 covering the edge of the first electrode 210 facing the first electrode 210 is an acute angle. Thus, the portion of the second electrode layer 600 located within the pixel opening K near the pixel definition layer 400 is relatively gentle, ensuring that the overall step difference of the portion of the second electrode layer 600 distributed within the pixel opening K is relatively small, reducing the possibility of the second electrode layer 600 breaking.

[0096] In another possible implementation, please refer to Figure 13, which is a partial cross-sectional schematic diagram of another display panel provided in another embodiment of this application. The third defining layer 430 is sloped on the side near the pixel opening K, and the angle between the sloped surface and the side of the third defining layer 430 facing the driving back plate 100 is an acute angle. In this way, the portion of the second electrode layer 600 located in the pixel opening K near the pixel defining layer 400 is relatively gentle, so as to ensure that the overall step difference of the portion of the second electrode layer 600 distributed in the pixel opening K is relatively small, reducing the possibility of the second electrode layer 600 breaking.

[0097] It should be noted that the "smoothing treatment" mentioned in the above embodiments for the side of a film layer facing away from the driving backplate refers to processing this side of the film layer facing away from the driving backplate using a chemical mechanical polishing (CMP) process or an etch-back process, thereby making this side of the film layer parallel to the plane of the driving backplate. For example, smoothing the side of the first defining layer facing away from the driving backplate means processing this side of the first defining layer facing away from the driving backplate using a CMP process or an etch-back process.

[0098] It should also be noted that the multiple stacked inorganic insulating layers in the pixel definition layer of this application embodiment are obtained using a single patterning process. For example, if the pixel definition layer includes a stacked third definition layer, a first definition layer, and a second definition layer, three inorganic insulating films can be formed sequentially first, and then a single patterning process can be performed on these three inorganic insulating films to obtain the stacked third definition layer, first definition layer, and second definition layer. Here, the single patterning process may include: photoresist coating, exposure, development, etching, and photoresist stripping.

[0099] In summary, the display panel provided in this application includes: a driving backplate, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer. The pixel definition layer has multiple pixel openings, and the sidewalls of the pixel openings have concave structures. The distance between the side of the filling layer facing away from the driving backplate and the driving backplate is greater than or equal to the distance between the side of the first electrode layer facing away from the driving backplate and the driving backplate, ensuring relatively high flatness on the side of the filling layer facing away from the driving backplate. Therefore, distributing the concave structures on the side of the filling layer facing away from the driving backplate ensures that the distribution positions of the concave structures on the sidewalls of each pixel opening are basically consistent, thus ensuring that the isolation effect of the concave structures on the sidewalls of each pixel opening on the organic light-emitting layer is basically consistent. In this way, at least a portion of the orthographic projection of the concave structure on the driving backplate may not coincide with the orthographic projection of the first electrode on the driving backplate; that is, at least a portion of the orthographic projection of the concave structure on the driving backplate is located outside the orthographic projection of the first electrode on the driving backplate. Thus, the area covered by the concave structure on the sidewall of the pixel aperture in the first electrode is small, which increases the connection area between the first electrode and the organic light-emitting layer, effectively improving the aperture ratio of the display panel and thus making the display panel display better.

[0100] This application also provides a display device. The display device can be any product or component with display functionality, such as AR / VR devices, mobile phones, tablets, televisions, monitors, laptops, digital photo frames, or navigators. The display device can include a driver chip and a display substrate. The display substrate can be a silicon-based OLED display substrate.

[0101] In this embodiment, the display substrate can be the display substrate described in the above embodiments. For example, it can be the display substrate shown in Figures 2 to 13. The display substrate is connected to a driver chip, which provides electrical signals to the display substrate to enable it to display images.

[0102] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0103] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0104] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A display panel, characterized in that, include: The driving backplane (100), the first electrode layer (200), the filling layer (300), the pixel definition layer (400), the organic light-emitting layer (500), and the second electrode layer (600); The first electrode layer (200) is located on one side of the drive back plate (100). The first electrode layer (200) has a plurality of separately disposed first electrodes (210), and the first electrodes (210) are electrically connected to the drive back plate (200). The filling layer (300) is located on the side of the drive back plate (100) where the first electrode layer (200) is disposed, and is distributed between two adjacent first electrodes (210); The pixel definition layer (400) is located on the side of the filling layer (300) away from the driving backplate (100). The pixel definition layer (400) has a plurality of pixel openings (K), and the sidewalls of the pixel openings (K) have concave structures (N). The organic light-emitting layer (500) is located on the side of the pixel definition layer (400) opposite to the driving backplate (100); The second electrode layer (200) is located on the side of the organic light-emitting layer (500) opposite to the driving backplate (100); Wherein, the distance between the side of the filling layer (300) facing away from the driving back plate (100) and the driving back plate (100) is greater 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); the orthographic projection of the concave structure (N) on the driving back plate (100) overlaps with the orthographic projection of the filling layer (300) on the driving back plate (100), and the orthographic projection of the concave structure (N) on the driving back plate (100) is at least outside the orthographic projection of the first electrode (210) on the driving back plate (100).

2. The display panel according to claim 1, characterized in that, The drive backplate (100) has a groove (O) on the side facing the first electrode layer (200). The groove (O) is distributed between the orthographic projections of two adjacent first electrodes (210) on the drive backplate (100). The groove (O) includes at least two first sub-grooves (O1) and second sub-grooves (O2) distributed in different regions. The depth of the first sub-grooves (O1) is greater than the depth of the second sub-grooves (O2). The distance between the side of the filling layer (300) away from the drive back plate (100) and the bottom surface of the first sub-groove (O1) is greater than the distance between the side of the filling layer (300) away from the drive back plate (100) and the bottom surface of the second sub-groove (O2).

3. The display panel according to claim 2, characterized in that, For any one of the first electrodes (210), the filling layer (300) distributed around the first electrode (210) is flush with the side facing away from the drive backplate (100), and the side of the filling layer (300) facing away from the drive backplate (100) is a plane parallel to the drive backplate (100).

4. The display panel according to claim 1, characterized in that, The orthographic projection of the concave structure (N) on the drive back plate (100) does not coincide with the orthographic projection of the first electrode (210) on the drive back plate (100).

5. The display panel according to claim 1, characterized in that, When the distance between the side of the filling layer (300) facing away from the driving backplate (100) and the driving backplate (100) is 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), the filling layer (300) covers the edge portion of the first electrode (210), and the orthographic projection of the pixel definition layer (400) on the driving backplate (100) is located within the orthographic projection of the filling layer (300) on the driving backplate (100).

6. The display panel according to claim 5, characterized in that, The outer boundary of the orthographic projection of the pixel definition layer (400) onto the driving backplate (100) does not coincide with the outer boundary of the orthographic projection of the filling layer (300) onto the driving backplate (100).

7. The display panel according to claim 5, characterized in that, The orthographic projection of the pixel definition layer (400) on the driving backplate (100) does not coincide with the orthographic projection of the first electrode (210) on the driving backplate (100).

8. The display panel according to any one of claims 1 to 7, characterized in that, The display panel further includes: an insulating layer (700), the insulating layer (700) being located on the side of the driving back plate (100) facing the first electrode layer (200), the filling layer (300) and the first electrode layer (200) being located on the side of the insulating layer (700) away from the driving back plate (100), and the insulating layer (700) having a plurality of through holes (G) corresponding one-to-one with the plurality of first electrodes (210), the first electrodes (210) being electrically connected to the driving back plate (100) through the corresponding through holes (G); Wherein, the side of the insulating layer (700) facing away from the driving backplate (100) is a plane parallel to the driving backplate (100), or, the side of the insulating layer (700) facing away from the driving backplate (100) has a groove (O), a portion of the filling layer (700) is located in the groove (O), and the orthographic projection of the groove (O) on the driving backplate (100) is located between the orthographic projections of two adjacent first electrodes (210) on the driving backplate (100).

9. The display panel according to any one of claims 1 to 7, characterized in that, The pixel definition layer (400) includes a first definition layer (410) and a second definition layer (420) stacked along a direction perpendicular to and away from the driving substrate (10), and the pixel opening (K) passes through the second definition layer (420) and the first definition layer (410) in sequence; Wherein, the orthographic projection of the first defining layer (410) on the drive back plate (100) is located within the orthographic projection of the second defining layer (420) on the drive back plate (100), and the outer boundary of the orthographic projection of the first defining layer (410) on the drive back plate (100) does not coincide with the outer boundary of the orthographic projection of the second defining layer (420) on the drive back plate (100).

10. The display panel according to claim 9, characterized in that, The side of the first defining layer (410) facing away from the drive backplate (100) and the side of the second defining layer (420) facing away from the drive backplate (100) are both parallel to the plane of the drive backplate (100).

11. The display panel according to claim 9, characterized in that, The pixel definition layer (400) further includes a third definition layer (430), which is located on the side of the first definition layer (410) facing the driving backplate (100), and the pixel opening (K) also penetrates the third definition layer (430); Wherein, the orthographic projection of the first defining layer (410) on the drive back plate (100) is located within the orthographic projection of the third defining layer (430) on the drive back plate (100), and the outer boundary of the orthographic projection of the first defining layer (410) on the drive back plate (100) does not coincide with the outer boundary of the orthographic projection of the third defining layer (430) on the drive back plate (100).

12. The display panel according to claim 11, characterized in that, The orthographic projection of the third defining layer (430) on the drive backplate (100) does not coincide with the orthographic projection of the first electrode (210) on the drive backplate (100).

13. The display panel according to claim 11, characterized in that, In a direction parallel to the drive backplate (100), the width of the portion of the third defining layer (430) protruding outward relative to the first defining layer (410) is greater than or equal to the width of the portion of the second defining layer (420) protruding outward relative to the first defining layer (410).

14. The display panel according to any one of claims 11 to 13, characterized in that, The side of the third defining layer (430) facing away from the drive backplate (100) is a plane parallel to the drive backplate (100).

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

Images