Display panel and method for preparing same, and display device

Abstract

The present disclosure relates to a display panel and a method for preparing same, and a display device. The display panel comprises: a base substrate; a plurality of first electrodes located on one side of the base substrate; and a pixel definition layer located on the side of the first electrodes facing away from the base substrate. The pixel definition layer comprises a main body portion, first trenches and second trenches, wherein the first trenches penetrate through the pixel definition layer and expose the first electrodes; the main body portion is located between two adjacent first trenches; and the second trenches are located on the side of the main body portion away from the base substrate. An included angle is formed between the bottom surface of the main body portion and each first side surface close to the first grooves, and the included angle is less than or equal to 40 degrees. In the technical solution of the present disclosure, the angle of inclination of the pixel definition layer on the side close to the first grooves is relatively small, thereby reducing the occlusion of light emitted at large angles, and being conducive to alleviating the color shift problem.

Description

Display panel and its manufacturing method, display device

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411982905.3, filed on December 31, 2024, entitled “Display Panel and Method of Manufacturing Thereof, Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of display technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0004] With the continuous development of display technology, display panels have been widely used in people's production and daily life. However, there are still some problems with display panels in related technologies that need to be solved, such as color distortion. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a display panel and a method for manufacturing the same, as well as a display device.

[0006] This disclosure provides a display panel, including:

[0007] Substrate;

[0008] Multiple first electrodes are located on one side of the substrate.

[0009] A pixel definition layer is located on the side of the first electrode away from the substrate. The pixel definition layer includes a main body, a first groove, and a second groove. The first groove penetrates the pixel definition layer and exposes the first electrode. The main body is located between two adjacent first grooves, and the second groove is located on the side of the main body away from the substrate.

[0010] The bottom surface of the main body and the first side surface of the main body near the first groove have an angle, which is less than or equal to 40 degrees.

[0011] This disclosure provides a method for manufacturing a display panel, including:

[0012] Provide substrates;

[0013] A plurality of first electrodes are formed on one side of the substrate;

[0014] A pixel definition layer is formed on the side of the first electrode that is away from the substrate.

[0015] The pixel definition layer is patterned to form the main body, the first groove, and the second groove;

[0016] The first groove penetrates the pixel definition layer and exposes the first electrode. The main body is located between two adjacent first grooves, and the second groove is located on the side of the main body away from the substrate. The bottom surface of the main body and the first side surface of the main body near the first groove have an angle of less than or equal to 40 degrees.

[0017] This disclosure provides a display device including the aforementioned display panel. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar features, and the drawings are not drawn to scale.

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of this disclosure;

[0022] Figure 2 is a schematic diagram of a cross-sectional structure along A1-A2 in Figure 1;

[0023] Figure 3 is a schematic diagram of another cross-sectional structure along A1-A2 in Figure 1;

[0024] Figure 4 is an enlarged schematic diagram of a partial film layer in a display panel provided in an embodiment of this disclosure;

[0025] Figure 5 is a schematic diagram of the structure of a display panel provided by related technologies;

[0026] Figure 6 is a schematic diagram of another display panel provided by related technologies;

[0027] Figure 7 is a schematic diagram of the structure of another display panel provided in an embodiment of this disclosure;

[0028] Figure 8 is a schematic diagram of the structure of another display panel provided in an embodiment of this disclosure;

[0029] Figure 9 is a schematic diagram of the structure of another display panel provided in an embodiment of this disclosure;

[0030] Figure 10 is a schematic diagram of the structure of another display panel provided in an embodiment of this disclosure;

[0031] Figure 11 is a schematic diagram of the structure of another display panel provided in an embodiment of this disclosure;

[0032] Figure 12 is a schematic diagram of a cross-sectional structure along A3-A4 in Figure 11;

[0033] Figure 13 is a cross-sectional structural diagram of another display panel provided in an embodiment of this disclosure;

[0034] Figure 14 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this disclosure;

[0035] Figure 15 is a schematic diagram of the structure of a substrate provided by S210 in the preparation method shown in Figure 14;

[0036] Figure 16 is a schematic diagram of the structure formed by S220 in the preparation method shown in Figure 14;

[0037] Figure 17 is a schematic diagram of the structure formed by S230 in the preparation method shown in Figure 14;

[0038] Figure 18 is a schematic diagram of the structure formed by S240 in the preparation method shown in Figure 14;

[0039] Figure 19 is a detailed flowchart of the preparation method of S240 shown in Figure 14;

[0040] Figure 20 is a schematic diagram of the structure formed in step S241 of the process shown in Figure 19;

[0041] Figure 21 is a detailed flowchart of step S241 in the process flow shown in Figure 19;

[0042] Figure 22 is a schematic diagram of a halftone mask provided in an embodiment of this disclosure;

[0043] Figure 23 is a schematic diagram of the alignment between the halftone mask and the substrate provided in the embodiments of this disclosure;

[0044] Figure 24 is a detailed flowchart of step S2411 in the step flow shown in Figure 21;

[0045] Figure 25 is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0047] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0048] In organic light-emitting diode (OLED) display panels, to enhance carrier migration and recombination efficiency, functional layers such as electron transport layers, electron injection layers, hole transport layers, and hole injection layers are typically placed between the electrodes of the OLED devices and the actual light-emitting layer. However, since these functional layers usually cover the entire surface of the display panel, meaning they are common layers for all OLED devices, during display, in addition to the normal longitudinal migration of carriers from their respective cathodes and / or anodes to the corresponding light-emitting layers, carriers also migrate laterally between different OLED devices through these functional layers. This lateral leakage leads to crosstalk between different sub-pixels during display. To solve the lateral leakage problem, trenches can be placed between adjacent OLED devices to extend the leakage path. The inventors have discovered that display panels using trench structures are prone to visual problems such as color shift.

[0049] To address this, this disclosure provides a display panel including a substrate, a plurality of first electrodes located on one side of the substrate, and a pixel definition layer located on the side of the first electrodes facing away from the substrate. The pixel definition layer includes a main body, a first groove, and a second groove. The first groove penetrates the pixel definition layer and exposes the first electrodes, serving as an opening area. The main body is located between two adjacent first grooves, and the second groove is located on the side of the main body away from the substrate, extending the leakage path to improve leakage. An angle is formed between the bottom surface of the main body and the first side surface near the first groove, and this angle is less than or equal to 40 degrees. Therefore, the tilt angle of the pixel definition layer in the opening area is small, reducing the obstruction of large-angle emitted light by the main body and allowing more large-angle light to exit from the display panel, thereby improving color distortion.

[0050] The display panel, the method for manufacturing the display panel, and the display device provided in the embodiments of this disclosure will be described by way of example below with reference to the accompanying drawings.

[0051] For example, Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present disclosure, Figure 2 is a schematic diagram of a cross-sectional structure along A1-A2 in Figure 1, Figure 3 is a schematic diagram of another cross-sectional structure along A1-A2 in Figure 1, and Figure 4 is an enlarged schematic diagram of a local film layer in a display panel provided in an embodiment of the present disclosure, showing a display panel including a substrate, a first electrode and a pixel definition layer. Referring to Figures 1 and 4, the display panel 10 may include: a substrate 100; a plurality of first electrodes 110 located on one side of the substrate 100; and a pixel definition layer 120 located on the side of the first electrodes 110 facing away from the substrate 100. The pixel definition layer 120 includes a main body 121, a first groove 122, and a second groove 123. The first groove 122 penetrates the pixel definition layer 120 and exposes the first electrodes 110. The main body 121 is located between two adjacent first grooves 122, and the second groove 123 is located on the side of the main body 121 away from the substrate 100. An angle A0 is formed between the bottom surface 1211 of the main body 121 and the first side surface 1212 of the main body 121 near the first groove 122. This angle A0 is less than or equal to 40 degrees, i.e., A0 ≤ 40 degrees. The angle A0 faces the main body 121.

[0052] The substrate 100 is used to support the functional film layer located thereon. The functional film layer may include a driving circuit layer, a light-emitting element layer, and other auxiliary film layers known to those skilled in the art, which are not described in detail here and are not limited thereto. In some implementations, the substrate 100 may also be a driving circuit substrate, that is, the substrate 100 may be a substrate on which a driving circuit layer has been formed, and the functional film layer located thereon may include a light-emitting element layer and other auxiliary film layers, which are not limited thereto.

[0053] For example, the substrate 100 may be a rigid substrate or a flexible substrate; wherein, the rigid substrate may include a glass substrate or other non-bendable / rollable substrate, and the flexible substrate may include a stainless steel substrate, a polyimide (PI) substrate or other bendable / rollable substrate, which is not limited herein.

[0054] The display panel 10 also includes a first electrode 110, which is located on one side of the substrate 100. There are multiple first electrodes 110; for example, in Figure 1, the display panel 10 has four first electrodes 110, but this does not constitute a limitation on the display panel 10 provided in this embodiment. The display panel 10 typically has a large number of first electrodes 110, and this embodiment does not limit the specific number of first electrodes 110 in the display panel 10.

[0055] The first electrode 110 is the electrode structure of the light-emitting element (not shown) in the display panel 10. For example, in the display panel 10, the light-emitting element includes an organic light-emitting diode (OLED), and the first electrode 110 can be an anode or other pixel electrode, such as a cathode, which is not limited here.

[0056] For example, the display panel 10 may include a pixel circuit on one side of the substrate 100. The pixel circuit is electrically connected to the first electrode 110. The pixel circuit may include structures such as an active layer, a gate, a source, and a drain. Furthermore, multiple layers of insulating layers are stacked between the substrate 100 and the first electrode 110, such as a buffer layer, a gate insulating layer, an interlayer insulating layer, and a planarization layer. The type and position of the insulating layer may be set based on the specific type and number of pixel circuits. This disclosure does not limit this aspect.

[0057] The display panel 10 also includes a pixel definition layer 120, which defines the light-emitting area of ​​a sub-pixel. Exemplarily, the pixel definition layer 120 includes a main body 121 and a first groove 122. The main body 121 is located between two adjacent first grooves 122, defining the first groove 122. The first groove 122 penetrates the pixel definition layer 120 and exposes at least a portion of the first electrode 110. The first electrode 110 contacts a common layer (e.g., a hole injection layer as described herein; the display panel may also include functional film layers such as an electron transport layer, electron injection layer, hole transport layer, and hole injection layer; this common layer and the light-emitting structure of the display panel will be exemplarily described later in conjunction with Figures 2 and 3) at the first groove 122, thereby enabling the light-emitting element to emit light and display data at the first groove 122. Different sizes of the first groove 122 can limit the exposed size of the first electrode 110, thus determining the size of the light-emitting area of ​​the light-emitting element including the first electrode 110. This embodiment does not limit the size or dimensions of the first groove 122.

[0058] In some implementations, referring to FIG2, a display panel with a single-layer light-emitting structure is shown. The display panel 10 may further include a first light-emitting layer 140 and a second electrode 170. The first light-emitting layer 140 is located on the side of the first electrode 110 away from the substrate 100, and the second electrode 170 is located on the side of the first light-emitting layer 140 away from the first electrode 110. That is, the first light-emitting layer 140 is located between the first electrode 110 and the second electrode 170, and can emit light based on the potential difference between the first electrode 110 and the second electrode 170.

[0059] For example, continuing to refer to FIG2, the display panel 10 may further include a first carrier layer 151 and a second carrier layer 152; the first carrier layer 151 is located between the first light-emitting layer 140 and the first electrode 110, and the second carrier layer 152 is located between the first light-emitting layer 140 and the second electrode 170. For example, the first electrode 110 may be an anode, the second electrode 170 may be a cathode, the first carrier layer 151 may include an electron injection layer and / or an electron transport layer, and the second carrier layer 152 may include a hole injection layer and / or a hole transport layer, which are not limited herein. The first carrier layer 151 and the second carrier layer 152 may be a common layer and deposited within the second groove 123 to extend the leakage path and improve leakage. For example, the common layer may be fabricated using a common mask.

[0060] In this display panel 10, by setting the sub-pixel 130 to include a first light-emitting layer 140 with a single layer, the film structure of the display panel 10 is relatively simple and easy to process and manufacture while meeting practical needs.

[0061] In some implementations, referring to FIG3, a display panel with a stacked light-emitting structure is shown. The display panel 10 may further include: a first light-emitting layer 140 located on the side of the first electrode 110 away from the substrate 100; a charge-generating layer 150 located on the side of the first light-emitting layer 140 away from the first electrode 110; a second light-emitting layer 160 located on the side of the charge-generating layer 150 away from the first light-emitting layer 140; and a second electrode 170 located on the side of the second light-emitting layer 160 away from the charge-generating layer 150.

[0062] The display panel 10 includes a first light-emitting layer 140 and a second light-emitting layer 160. The second light-emitting layer 160 is located on the side of the first light-emitting layer 140 away from the substrate 100. The orthographic projection of the second light-emitting layer 160 onto the plane of the substrate 100 at least partially overlaps with the orthographic projection of the first light-emitting layer 140 onto the plane of the substrate 100. At least a portion of the first light-emitting layer 140 and the second light-emitting layer 160 are located within a first recess 122. For example, both the first light-emitting layer 140 and the second light-emitting layer 160 can be fabricated using a fine metal mask (FMM). The first light-emitting layer 140 is deposited within the first recess 122 of the pixel definition layer 120 and can partially extend outside the first recess 122. The first light-emitting layers 140 of different sub-pixels are independent of each other. The second light-emitting layers 160 of different sub-pixels are independent of each other.

[0063] For example, the first light-emitting layer 140 and the second light-emitting layer 160 may emit the same color or different colors.

[0064] As shown in Figure 3, the display panel 10 may further include a charge generation layer 150 and a second electrode 170. The charge generation layer 150 is located between the first light-emitting layer 140 and the second light-emitting layer 160, and the second electrode 170 is located on the side of the second light-emitting layer 160 away from the charge generation layer 150. For example, as shown in Figure 13, the charge generation layer 150 may be continuous within the second recess 123. In other implementations, the charge generation layer 150 may also be interrupted within the second recess 123, thereby isolating the lateral leakage current between two adjacent sub-pixels 130, overcoming crosstalk between adjacent sub-pixels 130 caused by the high conductivity of the charge generation layer 150, and improving the display quality of the display panel 10. Alternatively, the charge generation layer 150 may be provided to protrude in the second groove 123 toward the side away from the substrate 100, so as to increase the transmission path of lateral leakage current in the charge generation layer 150, suppress the lateral leakage current between two adjacent sub-pixels 130, overcome the crosstalk between adjacent sub-pixels 130 caused by the high conductivity of the charge generation layer 150, and improve the display quality of the display panel 10.

[0065] Referring again to Figure 3, the display panel 10 may further include a first carrier layer 151, a second carrier layer 152, a third carrier layer 153, and a fourth carrier layer 154. The first carrier layer 151 is located between the first light-emitting layer 140 and the first electrode 110; the second carrier layer 152 is located between the second light-emitting layer 160 and the second electrode 170; the third carrier layer 153 is located between the first light-emitting layer 140 and the charge-generating layer 150; and the fourth carrier layer 154 is located between the second light-emitting layer 160 and the charge-generating layer 150. Exemplarily, the first electrode 110 is the anode, and the second electrode 170 is the cathode. The first carrier layer 151 may include an electron injection layer and / or an electron transport layer; the second carrier layer 152 may include a hole injection layer and / or a hole transport layer; the third carrier layer 153 may include a hole injection layer and / or a hole transport layer; and the fourth carrier layer 154 may include an electron injection layer and / or an electron transport layer, which are not limited herein. The first sublayer 151, the second sublayer 152, the third sublayer 153, and the fourth sublayer 154 can be a common layer and deposited within the second groove 123 to extend the leakage path and improve leakage. Exemplarily, the common layer can be fabricated using a common mask.

[0066] In this display panel 10, by setting the sub-pixel 130 as a series structure including a first light-emitting layer 140 and a second light-emitting layer 160 stacked together, the light-emitting brightness of the sub-pixel 130 can be improved, the power consumption of the display panel 10 can be reduced, and the lifespan of the display panel 10 can be improved.

[0067] In the display panel 10 provided in this embodiment, the pixel definition layer 120 further includes a second groove 123. The second groove 123 is located on the side of the main body 121 away from the substrate 100, and is used to extend the leakage path between adjacent sub-pixels to improve leakage and enhance the display effect. For example, taking the display panel 10 shown in FIG1 as an example, the second groove 123 may be arranged around the first groove 122 used to define the light-emitting area, and the second groove 123 has at least one break around the first groove 122. This break allows the second electrode 170 to be well connected; at the same time, at the break location, the impedance of the second electrode 170 is relatively small, which can reduce the attenuation of the electrical signal caused by impedance and help improve display uniformity. For example, FIG1 only shows two or three breaks in the second groove 123 around the light-emitting area of ​​the same color, that is, the second groove 123 is divided into two or three segments. In other implementations, the second groove 123 may also be set in other numbers and shapes, which are not limited here.

[0068] For example, continuing to refer to FIG4, the main body 121 of the pixel definition layer 120 includes a bottom surface 1211 and a first side surface 1212. The bottom surface is the side facing the substrate 100. Taking the orientation shown in FIG1 as an example, the bottom surface 1211 is the lower surface of the main body 121. The first side surface 1212 is close to the first groove 122, or can be understood as the first side surface 1212 facing the first groove 122. The first side surface 1212 and the bottom surface 1211 have an included angle A0. The included angle A0 can also be understood as the tilt angle of the main body 121 of the pixel definition layer 120 in the first groove 122.

[0069] In the display panel 10 provided in this embodiment, by setting the included angle A0 to be less than or equal to 40 degrees, the tilt angle of the main body 121 of the pixel definition layer 120 at the first groove 122 is smaller, which reduces the obstruction of large-angle light by the main body 121 and allows more large-angle light to be emitted from the display panel, thereby improving the color shift problem.

[0070] For example, Figure 5 is a schematic diagram of the structure of a display panel provided by the related art, and Figure 6 is a schematic diagram of the structure of another display panel provided by the related art. In these figures, 10-1 represents a first display panel with a second groove in the pixel definition layer for improving leakage, 10-2 represents a second display panel without a second groove in the pixel definition layer for improving leakage, A1 represents the tilt angle of the main body 121 of the pixel definition layer 120 in the first display panel 10-1 in the first groove 122, and A2 represents the tilt angle of the main body 121 of the pixel definition layer 120 in the second display panel 10-2 in the first groove 122. Comparing the display panel structures of 10-1 and 10-2, those skilled in the art have discovered that in the first display panel 10-1, which employs a groove structure (shown as the second groove 123 in FIG5), because a groove needs to be made on the side of the main body 121 of the pixel definition layer 120 away from the substrate 100, the thickness of the pixel definition layer 120 needs to be greater than the thickness of the pixel definition layer 120 in the second display panel 10-2, which does not have a groove structure. This results in a larger tilt angle A1 compared to the tilt angle A2. When the tilt angle A1 is greater than 40 degrees, the main body 121 will block large-angle emitted light, causing visual problems such as color distortion.

[0071] In response to this, in the display panel 10 provided in this embodiment, by setting the included angle A0 to be less than or equal to 40 degrees, the tilt angle of the main body 121 of the pixel definition layer 120 at the first groove 122 is smaller, which reduces the obstruction of large-angle light by the main body 121 and allows more large-angle light to be emitted from the display panel, thereby improving the color shift problem.

[0072] For example, the included angle A0 can be 40 degrees, 38 degrees, 35 degrees, 36.9 degrees, 35.5 degrees, 37 degrees to 40 degrees, 30 degrees to 35 degrees, or other angles or angle ranges less than or equal to 40 degrees, which can be set according to the needs of the display panel 10 and are not limited here.

[0073] It should be noted that in the same display panel 10, the included angle A0 at different positions of the first groove 122 may be the same or different; the included angle A0 on different sides of the same first groove 122 may be the same or different; the included angle A0 at different positions on the same side of the same first groove 122 may be the same or different, and none of these are limited here.

[0074] In some implementations, Figure 7 is a structural schematic diagram of another display panel provided in an embodiment of the present disclosure, Figure 8 is a structural schematic diagram of another display panel provided in an embodiment of the present disclosure, Figure 9 is a structural schematic diagram of another display panel provided in an embodiment of the present disclosure, Figure 10 is a structural schematic diagram of another display panel provided in an embodiment of the present disclosure, and Figure 11 is a structural schematic diagram of another display panel provided in an embodiment of the present disclosure. Referring to Figure 1 or any one of Figures 7-11, in this display panel 10, the first side surface 1212 is located on at least one side of the first groove 122. Wherein, on the side where the first side surface 1212 is located, the main body 121 of the pixel definition layer 120 has an inclination angle of less than or equal to 40 degrees in the first groove 122, which can reduce the obstruction of light emitted at large angles and improve the color shift problem at the corresponding viewing angle.

[0075] The planar shape of the first groove 122 can be quadrilateral, hexagonal, other polygonal, circular, elliptical, or other shapes, and is not limited herein. The planar shape of the first groove 122 is the shape of the first groove 122 in a plane parallel to the plane of the substrate 100, for example, the shape in a plane defined by the first direction X and the second direction Y. The following description uses a quadrilateral first groove 122 as an example.

[0076] Based on this, the first side surface 1212 can be located on one side of the first groove 122. For example, taking the orientation shown in FIG7 or FIG8 as an example, the first side surface 1212 can be located on the left (refer to FIG7), right (refer to FIG8), upper or lower side of the first groove 122, so that the tilt angle of the main body 121 on the corresponding side is less than or equal to 40 degrees, thereby improving the color distortion problem under the view of the corresponding side.

[0077] Alternatively, the first side surface 1212 may be located on both sides of the first groove 122, so that the tilt angle of the main body 121 on the corresponding sides is less than or equal to 40 degrees, thereby improving the color cast problem under the viewing angles of the corresponding sides. For example, referring to FIG10, the first side surface 1212 may be located on adjacent sides of the first groove 122. Taking the orientation shown in the figure as an example, the first side surface 1212 may be located on the left and upper sides of the first groove 122; or, the first side surface 1212 may be located on the left and lower sides of the first groove 122, or on the right and upper sides of the first groove 122, or on the right and lower sides of the first groove 122. Alternatively, referring to FIG9 or FIG11, the first side surface 1212 may also be located on opposite sides of the first groove 122. Taking the orientation shown in the figure as an example, the first side surface 1212 may be located on the left and right sides of the first groove 122 (refer to FIG9), or on the upper and lower sides of the first groove 122 (refer to FIG11).

[0078] In other implementations, when the first groove 122 is quadrilateral, the first side surface 1212 may also be located on three sides (refer to FIG. 12) or four sides (refer to FIG. 1) of the first groove 122, which is not limited here. It should be noted that in FIG. 1 and FIG. 7 to 11, the first side surface 1212 of the main body 121 is shown in bold lines.

[0079] In other implementations, when the shape of the first groove 122 is a polygon, the first side surface 1212 may be located on one side, both sides, or more sides of the first groove 122 to achieve corresponding side color shift improvement that meets display requirements; this is not limited here. It should be noted that when the first side surface 1212 is located on both sides or more sides of the first groove 122, the included angles corresponding to different sides may be the same or different; this is not limited here.

[0080] In some implementations, referring to Figure 1, the first side 1212 surrounds the first groove 122.

[0081] This configuration ensures that the tilt angle of the main body 121 of the pixel definition layer 120 on each different side of the first groove 122 is less than or equal to 40 degrees, which can reduce the obstruction of large-angle emitted light by the main body 121 on each side of the first groove, thereby improving the color shift problem of the display panel at different viewing angles.

[0082] For example, taking the display panel 10 shown in FIG10 as an example, the first groove 122 is quadrilateral, and the first side surface 1212 can be disposed on the four different sides of the first groove 122, so as to surround the first groove 122.

[0083] In other implementations, when the first groove 122 has other shapes, the first side 1212 can be disposed on all sides of the first groove 122 to surround the first groove 122, which can improve the color distortion problem under all different viewing angles.

[0084] In some implementations, continuing to refer to Figure 2, the width W0 of the vertical projection of the first side 1212 onto the substrate 100 is greater than or equal to 5.0 micrometers, i.e., W0 ≥ 5.0 micrometers.

[0085] This design allows the first side 1212 to have sufficient width, facilitating process design and manufacturing on the first side 1212, thereby removing more of the edge portion of the main body 121 within the first groove 122, resulting in a smaller included angle A0 and improving the color deviation problem.

[0086] Referring to Figures 1 and 2, the vertical projection of the first side surface 1212 onto the substrate 100 can be understood as the projection of the first side surface 1212 along a direction perpendicular to the substrate 100. The plane containing this projection is parallel to the plane containing the substrate 100, which can be understood as the plane determined by the first direction X and the second direction Y. The direction Z perpendicular to the plane containing the substrate 100 can be a third direction Z. Based on this, the vertical projection of the first side surface 1212 onto the substrate 100 can be understood as the projection of the first side surface 1212 into the plane determined by the first direction X and the second direction Y. The width W0 of the vertical projection of the first side surface 1212 onto the substrate 100 can be 5.0 micrometers, 5.2 micrometers, 5.0 to 5.3 micrometers, or other width values ​​or ranges greater than 5.0 micrometers, and is not limited here.

[0087] In some implementations, continuing to refer to FIG2, the thickness T0 of the main body 121 in the direction Z perpendicular to the plane of the substrate 100 is greater than or equal to 1.4 micrometers, i.e., T0 ≥ 1.4 micrometers.

[0088] This configuration ensures that the main body 121 of the pixel definition layer 120 has sufficient thickness to form the light-emitting device and the second groove 123 to improve leakage.

[0089] For example, the thickness T0 of the main body 121 may be 1.4 micrometers, 1.5 micrometers, 1.5 to 2.0 micrometers, or other thickness values ​​or ranges greater than 1.4 micrometers, which are not limited here.

[0090] In some implementations, continuing to refer to Figure 2, the thickness T0 of the main body 121 is less than or equal to 3.0 micrometers, i.e., T0 ≤ 3.0 micrometers.

[0091] This design ensures that the thickness of the main body 121 of the pixel definition layer 120 is not too thick, thereby ensuring that the overall thickness of the stacked structure display panel is not too thick, which is conducive to achieving a thinner display panel; at the same time, it allows the included angle A0 between the bottom surface 1211 of the main body 121 and the first side surface 1212 to be processed to be smaller, which is conducive to improving the color deviation problem.

[0092] For example, the thickness T0 of the main body 121 may be 1.4 micrometers, 1.5 micrometers, 2.4 micrometers, 2.5 micrometers, 2.8 micrometers, 3.0 micrometers, 2.7 to 3.0 micrometers, or other thickness values ​​or thickness ranges between 1.4 micrometers and 3.0 micrometers, which are not limited here.

[0093] In some implementations, continuing to refer to FIG2, in the direction Z perpendicular to the plane of the substrate 100, the height H1 of the second groove 123 is less than the thickness T0 of the main body 121.

[0094] This configuration allows the main body 121 of the pixel definition layer 120 to form a groove structure on the side facing away from the substrate 100, thereby extending the leakage path and improving leakage. The fact that the height of the second groove 123 is less than the thickness of the main body 121 indicates that the second groove 123 does not penetrate the pixel definition layer 120. This serves two purposes: firstly, it extends the leakage path; secondly, it prevents a large step difference between the bottom of the second groove 123 and the top surface of the main body 121, which could cause some common layers (e.g., cathodes) to break at the second groove 123. If a common layer breaks at the second groove 123, it will affect the transport of electrons or holes, impacting the display effect. Taking the orientation shown in Figure 2 as an example, the second groove 123 is formed on the side of the main body 121 of the pixel definition layer 120 away from the substrate 100.

[0095] In some implementations, Figure 13 is a schematic cross-sectional structure along A3-A4 in Figure 12. Referring to Figures 12 and 13, the display panel 10 further includes a plurality of sub-pixels 130, each sub-pixel 130 including a first electrode 110; the plurality of sub-pixels 130 includes a first color sub-pixel 131 and a second color sub-pixel 132, the first color being different from the second color; the first side surface 1212 includes a first side surface A 12121 and a first side surface B 12122, in the direction Z perpendicular to the plane of the substrate 100, the first side surface A 12121 overlaps with the first color sub-pixel 131, and the first side surface B 12122 overlaps with the second color sub-pixel 132; wherein, the included angle A0 between the first side surface A 12121 and the bottom surface 1211 (shown as the first included angle A01 in Figure 12) is different from the included angle A0 between the first side surface B 12122 and the bottom surface 1211 (shown as the second included angle A02 in Figure 12). In Figure 13, the first luminescent layer 140 represents the luminescent layer, and the two first luminescent layers on the left and right represent two different color sub-pixels.

[0096] In this design, the first color sub-pixel 131 emits light of the first color, and the second color sub-pixel 132 emits light of the second color. The first color and the second color are different, and their contributions to the displayed image are different; that is, the display image has different requirements for the first color light and the second color light. For example, the first color and the second color can be two of red, green, blue, white, or other colors, and the first color and the second color are different.

[0097] In the display panel 10 provided in this embodiment, by setting the first included angle A01 and the second included angle A02 to be different, the main body 121 of the pixel definition layer 120 corresponding to the first color sub-pixel 131 blocks large-angle light differently from the main body 121 of the pixel definition layer 120 corresponding to the second color sub-pixel 132. As a result, the large-angle light emitted from the first color sub-pixel 131 is different from the large-angle light emitted from the second color sub-pixel 132, which can meet the different requirements of the display screen for the first color light and the second color light.

[0098] In some implementations, the brightness decay rate of the first color sub-pixel 131 is greater than the brightness decay rate of the second color sub-pixel 132; the included angle A0 between the first side surface 12121 and the bottom surface 1211 (shown as the first included angle A01 in Figure 12) is smaller than the included angle A0 between the first side surface 12122 and the bottom surface 1211 (shown as the second included angle A02 in Figure 12).

[0099] The brightness decay rate of the first color sub-pixel 131 is greater than that of the second color sub-pixel 132, meaning the brightness of the first color sub-pixel 131 decays faster. Therefore, after the display panel 10 has been used for a certain period of time (i.e., after the first color sub-pixel 131 and the second color sub-pixel 132 have been used for the same amount of time), the brightness of the first color sub-pixel 131 will be dimmer than that of the second color sub-pixel 132. To address this, in the display panel 10 provided in this embodiment, by setting the first included angle A01 to be smaller than the second included angle A02, the main body 121 of the pixel definition layer 120 corresponding to the first color sub-pixel 131 blocks less light compared to the second color sub-pixel 132. This allows the first color sub-pixel 131 to emit more light, thereby compensating for the brightness decay and ensuring the display effect of the display panel 10.

[0100] For example, for a display panel including red, blue, and green sub-pixels, the brightness decay rate is ordered from fastest to slowest as follows: blue sub-pixel, green sub-pixel, red sub-pixel; the included angles are ordered from smallest to largest as follows: blue sub-pixel, green sub-pixel, red sub-pixel.

[0101] In other implementations, when the subpixels in the display panel are of other colors, the corresponding angle can be set based on the brightness decay rate of the subpixels. For example, the greater the brightness decay rate, the smaller the corresponding angle.

[0102] In some implementations, the display panel 10 further includes a plurality of sub-pixels 130, each sub-pixel 130 including a first electrode 110; in the direction perpendicular to the plane of the substrate 100, a first side surface 1212 overlaps with the sub-pixels 130; wherein the included angle A0 between the first side surface 1212 and the bottom surface 1211 corresponding to different colored sub-pixels 130 is the same.

[0103] This configuration satisfies the need for color deviation improvement without requiring different angle designs and processing for sub-pixels 130 of different colors. This helps reduce the design and processing difficulty of the display panel 10, thereby improving yield and reducing costs.

[0104] In other implementations, the display panel 10 may also include other structural components known to those skilled in the art, which will not be described in detail or limited herein.

[0105] Based on the same inventive concept, this disclosure also provides a method for preparing a display panel, which is used to prepare any of the display panels provided in the above embodiments and has corresponding beneficial effects. The similarities can be understood with reference to the above text and will not be repeated here.

[0106] For example, FIG14 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure. Referring to FIG14, the method for manufacturing the display panel may include the following steps.

[0107] S210, Provides a substrate.

[0108] For example, FIG15 is a schematic diagram of the structure of a substrate provided in S210 of the fabrication method shown in FIG14. Referring to FIG15, the substrate 100 may be a glass substrate. In other implementations, the substrate may also be a stainless steel substrate, a polyimide substrate, or a rigid or flexible substrate made of other materials, which is not limited here.

[0109] In some implementations, the substrate can also be a driving circuit substrate, that is, a substrate on which a driving circuit layer is formed, which is not limited here.

[0110] S220, A plurality of first electrodes are formed on one side of the substrate.

[0111] The display panel includes multiple first electrodes. When fabricating the display panel, multiple first electrodes need to be formed on one side of the substrate, as shown in Figure 16.

[0112] For example, the first electrode is the electrode structure of the light-emitting element in the display panel. The light-emitting element in the display panel may be an organic light-emitting diode (OLED), and the first electrode may be an anode or other pixel electrode, such as a cathode, which is not limited here.

[0113] The pixel circuit of the display panel is electrically connected to the first electrode on the substrate. The pixel circuit includes structures such as an active layer, a gate, a source, and a drain. Refer to the pixel circuit 101 in FIG13. There are multiple layers of insulating layers between the substrate and the first electrode, such as a buffer layer, a gate insulating layer, an interlayer insulating layer, and a planarization layer. The insulating layer can be set according to the specific type and number of pixel circuits. This disclosure does not limit this, and can be adapted according to the display panel and its manufacturing method.

[0114] It should be noted that the fabrication process of the first electrode can be mask evaporation or other processes known to those skilled in the art, and is not limited here.

[0115] S230, a pixel definition layer is formed on the side of the first electrode away from the substrate.

[0116] The display panel includes a patterned pixel definition layer. In this step, the entire pixel definition layer is first formed, as shown in Figure 17, and then patterned in subsequent steps to form a pixel definition layer that meets the requirements of the display panel.

[0117] For example, the pixel definition layer formed in this step covers the first electrode on the side facing away from the substrate. In subsequent steps, the first electrode can be exposed by patterning the pixel definition layer, as detailed below.

[0118] It should be noted that the pixel definition layer can be fabricated by vapor deposition or other processes known to those skilled in the art, and is not limited here.

[0119] S240. The pixel definition layer is patterned to form a main body, a first groove, and a second groove; wherein the first groove penetrates the pixel definition layer and exposes a first electrode, the main body is located between two adjacent first grooves, and the second groove is located on the side of the main body away from the substrate; the bottom surface of the main body and the first side surface near the first groove have an angle, which is less than or equal to 40 degrees.

[0120] In this process, by patterning the pixel definition layer, the main body portion can be retained, and a first groove and a second groove can be formed. Referring to FIG18, the first groove 122 penetrates the pixel definition layer 120 and exposes at least a portion of the first electrode 110, so that the first electrode 110 can subsequently make contact with other film layers of the light-emitting element within the first groove 122; the second groove 123 is formed on the side of the main body portion 121 away from the substrate 100, and is used to extend the leakage path between adjacent sub-pixels to improve leakage and enhance the display effect.

[0121] The main body 121 of the pixel definition layer 120 includes a bottom surface 1211 and a first side surface 1212. The bottom surface is the side facing the substrate 100. Taking the orientation shown in FIG18 as an example, the bottom surface 1211 is the lower surface of the main body 121. The first side surface 1212 is close to the first groove 122, or it can be understood that the first side surface 1212 faces the first groove 122. There is an included angle A0 between the first side surface 1212 and the bottom surface 1211. This included angle A0 can also be understood as the tilt angle of the main body 121 of the pixel definition layer 120 in the first groove 122.

[0122] In the method for manufacturing a display panel provided in this embodiment, by patterning the pixel definition layer, the angle between the bottom surface of the main body of the pixel definition layer and the first side facing the first groove is less than or equal to 40 degrees. This makes the tilt angle of the main body of the pixel definition layer at the first groove smaller, reducing the obstruction of large-angle light by the main body and allowing more large-angle light to be emitted from the display panel, thereby improving the color shift problem.

[0123] In some implementations, Figure 19 is a schematic flowchart of the refinement step S240 in the fabrication method shown in Figure 14. Based on Figure 14, referring to Figure 19, the pixel definition layer is patterned, which may specifically include:

[0124] S241. Based on the halftone mask patterned pixel definition layer, a first groove is formed in the pixel definition layer.

[0125] Among them, the halftone mask can be designed with different transmittance to meet the film removal requirements of the pixel definition layer at different locations.

[0126] For example, at the position corresponding to the first groove, the transmittance of the halftone mask can be 100%, that is, the first groove corresponds to the fully transparent area of ​​the halftone mask; and, at the edge position of the main body located in the first groove, the halftone mask can be provided with a semi-transparent area to remove more of the film layer of the main body at the edge position of the first groove, thereby reducing the tilt angle of the main body of the retained pixel definition layer in the first groove.

[0127] For example, FIG20 is a schematic diagram of the structure formed in step S241 of the process flow shown in FIG19. Referring to FIG20, in the structure formed in this step, the pixel definition layer 120 includes a main body 121 and a first groove 122, and the bottom surface 1211 of the main body 121 and the first side surface 1212 near the first groove 122 have an included angle A0, which is less than or equal to 40 degrees.

[0128] In some implementations, Figure 21 is a detailed flowchart of step S241 in the process flow shown in Figure 19. Based on Figure 19, referring to Figure 21, the pixel definition layer is patterned based on a halftone mask, and a first groove is formed in the pixel definition layer. Specifically, this may include:

[0129] S2411 provides halftone mask plates.

[0130] The halftone mask includes multiple fully transparent areas, a semi-transparent area located on at least one side of the fully transparent areas, and an opaque area surrounding the fully transparent areas and the semi-transparent areas.

[0131] In this process, the pixel definition layer at the corresponding position of the fully transparent area is completely removed and tilted due to process limitations; the tilt angle of the pixel definition layer at the corresponding position of the semi-transparent area is reduced, while the pixel definition layer at the corresponding position of the opaque area is retained.

[0132] For example, FIG22 is a schematic structural diagram of a halftone mask provided in an embodiment of the present disclosure. Referring to FIG22, the halftone mask 50 includes a plurality of fully transparent areas 501, a semi-transparent area 502 located on at least one side of the fully transparent area 501, and an opaque area 503 surrounding the fully transparent area 501 and the semi-transparent area 502. It is understood that in the halftone mask 50 shown in FIG22, only four fully transparent areas 501 are shown as an example, and the semi-transparent areas 502 are arranged around the full transparent area 501. In other implementations, the number, shape, and arrangement of the fully transparent areas 501, as well as the arrangement of the semi-transparent areas 502 around the fully transparent area 501, can be set according to the requirements of the display panel and its manufacturing method, and are not limited here.

[0133] S2412. Align the halftone mask with the substrate.

[0134] In this configuration, the fully transparent area is located within the first electrode in a direction perpendicular to the plane of the substrate, so as to remove the pixel definition layer at the corresponding position of the first electrode and form a first groove that exposes the first electrode.

[0135] For example, FIG23 is a schematic diagram of the alignment of a halftone mask and a substrate provided in an embodiment of the present disclosure. Referring to FIG23, in the direction Z perpendicular to the plane of the substrate 100, the range of the fully transparent region 501 is within the range of the first electrode 110. With this configuration, by completely removing the pixel definition layer 120 at the corresponding position of the fully transparent region 501, a first groove 122 exposing the first electrode 110 can be formed. At the same time, the semi-transparent region 502 is located on at least one side of the fully transparent region 501, so as to remove more of the pixel definition layer 120 at the edge position of the first groove 122 on the corresponding side, thereby forming a smaller tilt angle.

[0136] S2413, Etch the pixel definition layer, remove the pixel definition layer corresponding to the fully transparent area to form the first groove; and remove part of the pixel definition layer of the semi-transparent area to form the first side surface.

[0137] In this process, by etching the pixel definition layer to remove the pixel definition layer corresponding to the fully transparent area, multiple first grooves can be formed, and the first grooves expose at least part of the first electrode; simultaneously, the pixel definition layer corresponding to the semi-transparent area is partially removed, that is, more of the pixel definition layer at the edge of the first groove is removed to form the first side of the main body, and the first side forms an angle with the bottom surface of the main body, which is less than or equal to 40 degrees, so as to allow large-angle light to be emitted and improve color cast.

[0138] S242, Etch a pixel definition layer having a first groove, and form a second groove on the side of the main body away from the substrate.

[0139] For example, a dry etching process can be used to etch the pixel definition layer having the first groove to form a second groove on the side of the main body away from the substrate. Specifically, photoresist can be deposited on the side of the pixel definition layer away from the substrate, and a photoresist opening can be formed in the photoresist. The photoresist opening is an opening formed in the deposited photoresist, and the photoresist opening does not overlap with the first groove. Based on this, dry etching of the pixel definition layer will form a second groove at the photoresist opening.

[0140] In other implementations, the second groove may be formed in other ways known to those skilled in the art, and is not limited thereto.

[0141] In some implementations, continuing to refer to Figure 23, the transmittance T of the semi-permeable zone 502 is: 16% ≤ T ≤ 30%.

[0142] For example, the transmittance of the semi-permeable zone 502 may be 16%, 20%, 25%, 30%, 28%, 18%-21%, 23%-27%, or other transmittance values ​​or ranges, which are not limited herein.

[0143] Specifically, when the transmittance of the semi-transparent area 502 is different, the thickness of the pixel definition layer 120 to be removed is different, and the tilt angle of the first side surface relative to the bottom surface is different, that is, the angle between the first side surface and the bottom surface is different.

[0144] Therefore, by setting the transmittance of the semi-transparent area 502 to meet 16%≤T≤30%, while ensuring that the angle between the first side and the bottom surface is less than or equal to 40 degrees, the angle can also be differentiated for different color sub-pixels to meet display requirements; at the same time, a certain amount of process error can be allowed, reducing the requirements for the process and improving the yield.

[0145] In some implementations, continuing to refer to Figure 23, the width W of the semi-transparent region 502 is: 2 micrometers ≤ W ≤ W0; where W0 represents the width of the vertical projection of the first side surface onto the substrate 100.

[0146] Specifically, the semi-transparent area 502 is used to reduce the thickness of the edge of the main body facing the first groove 122, thereby reducing the tilt angle of the first side relative to the bottom surface. Therefore, the width of the semi-transparent area 502 should be within the range of the first side 1212 to accurately reduce the thickness of the edge of the main body facing the first groove, while avoiding the influence of this setting on other structures in the display panel.

[0147] For example, the width W may be 2.0 micrometers, 3.5 micrometers, W0, or other width values ​​or ranges between 2.0 micrometers and W0, which are not limited herein.

[0148] In some implementations, Figure 24 is a detailed flowchart of step S2411 in the process flow shown in Figure 21. Based on Figure 21 and referring to Figure 24, a halftone mask is provided, which may specifically include:

[0149] S24111. Based on the angle between the first side surface and the bottom surface, determine the target transmittance and target width of the semi-transparent area.

[0150] The wider the semi-transparent area, the smaller the included angle; the higher the transmittance of the semi-transparent area, the smaller the included angle. Based on this, the transmittance and width of the semi-transparent area can be comprehensively considered to determine the angle between the first side surface and the bottom surface, that is, to determine the target transmittance and target width; the target transmittance and target width can achieve the required angle.

[0151] For example, let's take a target width for the semi-permeable area with a transmittance of 20% as an example. When the width of the semi-permeable area is 3.0 micrometers, an angle of 40 degrees can be achieved; therefore, for an angle of 40 degrees, the target width of the semi-permeable area can be 3.0 micrometers. Alternatively, when the width of the semi-permeable area is 3.3 micrometers, an angle of 38 degrees can be achieved; therefore, for an angle of 38 degrees, the target width of the semi-permeable area can be 3.3 micrometers. Alternatively, when the width of the semi-permeable area is greater than or equal to 5.0 micrometers, an angle less than or equal to 30 degrees can be achieved; therefore, for an angle less than or equal to 30 degrees, the target width of the semi-permeable area can be less than or equal to 3.0 micrometers.

[0152] In other implementation methods, the transmittance of the semi-transparent area can be set to the transmittance of other targets, and the width of the semi-transparent area can be set to the width of other targets, depending on the angle requirements. This is not limited here.

[0153] S24112, Provides a halftone mask with a semitransparent area having a target transmittance and a target width.

[0154] Specifically, after determining the target width and target transmittance of the semi-transparent zone, a halftone mask that meets the requirements can be designed and provided based on the width and transmittance requirements.

[0155] Therefore, halftone masks that meet the requirements can be designed and provided for the size of the included angle.

[0156] In some implementations, aligning the halftone mask with the substrate may also include:

[0157] The second groove is located within the opaque area in a direction perpendicular to the plane of the substrate.

[0158] For example, continuing to refer to FIG23, the second groove 123 is located within the opaque area 503 in the direction Z perpendicular to the plane of the substrate 100. Thus, after the pixel definition layer 120 is etched by the halftone mask, the first groove 122 is formed, and a portion can be reserved in the main body 121 to form the second groove 123, which can be formed by dry etching in subsequent steps.

[0159] In the method for fabricating a display panel provided in this embodiment, a halftone mask is aligned with a substrate such that, in a direction perpendicular to the plane of the substrate, the fully transparent area is located within the first electrode, the second groove is located within the opaque area, and the semi-transparent area is located at the edge of the first groove. This achieves precise alignment, facilitating subsequent steps by removing the pixel definition layer of the fully transparent area to form the first groove, removing a portion of the pixel definition layer of the semi-transparent area to form the first side surface, and subsequently removing a portion of the pixel definition layer corresponding to the opaque area by dry etching to form the second groove.

[0160] In other implementations, for a display panel with a single-layer light-emitting structure, the fabrication method of the display panel may also include:

[0161] The first carrier layer is formed;

[0162] A first light-emitting layer is formed, which may include light-emitting block structures of different colors formed by mask evaporation.

[0163] Formation of a second carrier sublayer;

[0164] A second electrode is formed.

[0165] In other implementations, for a display panel with a stacked light-emitting structure, the fabrication steps of the display panel may further include:

[0166] Forming a light-emitting device structure;

[0167] A charge generation layer is formed between two adjacent light-emitting devices;

[0168] The light-emitting device structure may include a light-emitting layer and carrier layers located above and below the light-emitting layer. The carrier layers may include an electron injection layer and / or an electron transport layer located on the side of the light-emitting layer facing the first electrode, and a hole injection layer and / or a hole transport layer located on the side of the light-emitting layer facing the second electrode.

[0169] In other implementations, the method for preparing the display panel may also include forming other films known to those skilled in the art, such as an encapsulation protective film layer, which are not limited here.

[0170] Based on the above embodiments, this disclosure also provides a display device, which may include any of the display panels provided in the above embodiments, and has corresponding beneficial effects.

[0171] For example, FIG25 is a schematic diagram of the structure of a display device provided in an embodiment of the present disclosure. Referring to FIG25, the display device 30 includes a display panel 10, which may be any of the display panels provided in the above embodiments.

[0172] For example, the display device 30 includes, but is not limited to, mobile phones, computers, smart wearable devices with display functions, and other structural components with display functions, which are not described in detail or limited herein.

[0173] In other embodiments, the display device 30 may also include other structural components known to those skilled in the art, which will not be described in detail or limited herein.

[0174] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0175] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, comprising: Substrate; Multiple first electrodes are located on one side of the substrate. A pixel definition layer is located on the side of the first electrode away from the substrate. The pixel definition layer includes a main body, a first groove, and a second groove. The first groove penetrates the pixel definition layer and exposes the first electrode. The main body is located between two adjacent first grooves, and the second groove is located on the side of the main body away from the substrate. The bottom surface of the main body and the first side surface of the main body near the first groove have an angle, which is less than or equal to 40 degrees.

2. The display panel according to claim 1, wherein, The first side is located on at least one side of the first groove.

3. The display panel according to claim 2, wherein, The first side surrounds the first groove.

4. The display panel according to claim 1, wherein, The width of the vertical projection of the first side surface onto the substrate is greater than or equal to 5.0 micrometers.

5. The display panel according to claim 1, wherein, In a direction perpendicular to the plane of the substrate, the thickness of the main body is greater than or equal to 1.4 micrometers.

6. The display panel according to claim 5, wherein, The thickness of the main body is less than or equal to 3.0 micrometers.

7. The display panel according to claim 1, wherein, In a direction perpendicular to the plane of the substrate, the height of the second groove is less than the thickness of the main body.

8. The display panel according to claim 1, wherein, It also includes multiple sub-pixels, each of which includes the first electrode; The plurality of sub-pixels includes a first color sub-pixel and a second color sub-pixel, wherein the first color is different from the second color; The first side includes a first side A and a first side B. In the direction perpendicular to the plane of the substrate, the first side A overlaps with the first color sub-pixel, and the first side B overlaps with the second color sub-pixel. The angle between the first side surface A and the bottom surface is different from the angle between the first side surface B and the bottom surface.

9. The display panel according to claim 8, wherein, The brightness decay rate of the first color sub-pixel is greater than the brightness decay rate of the second color sub-pixel; The angle between the first side surface A and the bottom surface is smaller than the angle between the first side surface B and the bottom surface.

10. The display panel according to claim 1, wherein, It also includes multiple sub-pixels, each of which includes the first electrode; In a direction perpendicular to the plane of the substrate, the first side overlaps with the sub-pixel; The angle between the first side surface and the bottom surface corresponding to the sub-pixels of different colors is the same.

11. The display panel according to claim 1, wherein, Also includes: The first light-emitting layer is located on the side of the first electrode away from the substrate. A charge generation layer is located on the side of the first light-emitting layer away from the first electrode; The second light-emitting layer is located on the side of the charge-generating layer that is away from the first light-emitting layer; The second electrode is located on the side of the second light-emitting layer away from the charge-generating layer.

12. A method for manufacturing a display panel, comprising: Provide substrates; A plurality of first electrodes are formed on one side of the substrate; A pixel definition layer is formed on the side of the first electrode that is away from the substrate. The pixel definition layer is patterned to form the main body, the first groove, and the second groove; The first groove penetrates the pixel definition layer and exposes the first electrode. The main body is located between two adjacent first grooves, and the second groove is located on the side of the main body away from the substrate. The bottom surface of the main body and the first side surface of the main body near the first groove have an angle of less than or equal to 40 degrees.

13. The method for manufacturing a display panel according to claim 12, wherein, The pixel definition layer is patterned, including: The pixel definition layer is patterned based on a halftone mask, and the first groove is formed in the pixel definition layer; The pixel definition layer having the first groove is etched, and the second groove is formed on the side of the main body away from the substrate.

14. The method for manufacturing a display panel according to claim 13, wherein, The step of patterning the pixel definition layer based on a halftone mask, and forming the first groove in the pixel definition layer, includes: A halftone mask is provided; the halftone mask includes a plurality of fully transparent areas, a semi-transparent area located on at least one side of the fully transparent areas, and an opaque area surrounding the fully transparent areas and the semi-transparent areas; The halftone mask is aligned with the substrate; in a direction perpendicular to the plane of the substrate, the range of the fully transparent area is within the range of the first electrode; The pixel definition layer is etched to remove the pixel definition layer corresponding to the fully transparent area, forming the first groove; and a portion of the pixel definition layer in the semi-transparent area is removed to form the first side surface.

15. The method for manufacturing a display panel according to claim 14, wherein, The transmittance T of the semi-permeable zone is: 16% ≤ T ≤ 30%.

16. The method for manufacturing a display panel according to claim 14, wherein, The width W of the semi-permeable region is: 2 micrometers ≤ W ≤ W0; Wherein, W0 represents the width of the vertical projection of the first side surface onto the substrate.

17. The method for manufacturing a display panel according to claim 14, wherein, The provision of the halftone mask includes: Based on the angle between the first side surface and the bottom surface, the target transmittance and target width of the semi-transparent area are determined; A halftone mask is provided for the semitransparent area having a target transmittance and a target width.

18. The method for manufacturing a display panel according to claim 14, wherein, Aligning the halftone mask with the substrate further includes: The second groove is located within the opaque area in a direction perpendicular to the plane of the substrate.

19. A display device comprising the display panel according to any one of claims 1-11.

Images