Display panel and display device

Abstract

A display panel comprises a plurality of rectangular sub-pixel areas, each sub-pixel area comprises a light-emitting area and a clearance area which are adjacent to each other, and the clearance area comprises a vertex of a rectangle. The display panel comprises: a substrate, a drive circuit layer arranged on the substrate, and a plurality of pixel electrodes; a pixel definition structure arranged on the side of the plurality of pixel electrodes away from the substrate, wherein the pixel definition structure is provided with pixel openings in the light-emitting area, and the shape of the pixel opening is the same as that of the light-emitting area; and a plurality of light-emitting parts, wherein one light-emitting part is arranged in one pixel opening, one pixel opening corresponds to one pixel electrode, the pixel electrode comprises a main body part and a connecting part which are connected to each other, the shape of the main body part is the same as that of the pixel opening, the connecting part is located in the clearance area, and the connecting part is connected to the drive circuit layer.

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202410361756.2, filed on March 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] Organic Light Emitting Diode (OLED) is a new generation of display technology that has developed rapidly in recent years. It has the advantages of self-luminescence, fast response, high luminous efficiency and brightness, ultra-thinness, wide viewing angle, wide operating temperature range, simple production process, low power consumption and flexibility. It is widely used in many fields such as flat panel displays, flexible displays, automotive displays and solid-state lighting.

[0004] Summary of the Invention

[0005] On the one hand, a display panel is provided. The display panel includes a plurality of rectangular sub-pixel areas, each of which includes an adjacent light-emitting area and an avoidance area, the avoidance area includes a vertex of the rectangle, and the area of ​​the rectangle other than the avoidance area is the light-emitting area. The display panel includes: a substrate, a pixel definition structure, a plurality of pixel electrodes, and a plurality of light-emitting portions. The driving circuit layer is provided on the substrate; the plurality of pixel electrodes are provided on a side of the driving circuit layer away from the substrate; the pixel definition structure is provided on a side of the plurality of pixel electrodes away from the driving circuit layer; the pixel definition structure is provided with a pixel opening in the light-emitting area, the shape of the pixel opening being the same as the shape of the light-emitting area; a light-emitting portion is provided in one of the pixel openings; one of the pixel openings corresponds to one of the pixel electrodes, the pixel electrode includes a main body portion and a connecting portion connected to each other, the shape of the main body portion being the same as the shape of the pixel opening, the connecting portion being located in the avoidance area, and the connecting portion being connected to the driving circuit layer.

[0006] In some embodiments, the boundary of the main body portion includes two connected right-angled sides and a set side, one end of the two right-angled sides is connected and at a right angle, the two ends of the two right-angled sides that are away from each other are respectively connected to the two ends of the set side, and the set side includes an arc segment; one end of the connecting portion is connected to the arc segment of the boundary of the main body portion, and the other end of the connecting portion extends in a direction away from the main body portion and is connected to the driving circuit layer.

[0007] In some embodiments, two ends of the arc segment are respectively connected to two ends of the two right-angled sides that are far away from each other.

[0008] In some embodiments, the set edge further includes two straight line segments, the two straight line segments are respectively located at two ends of the arc segment, and the straight line segment is connected to one end of the arc segment and one end of one of the right-angled edges.

[0009] In some embodiments, the radius of curvature of the arc segment is less than or equal to the size of the right-angled side.

[0010] In some embodiments, the orthographic projection of the main body portion on the substrate is in the shape of a sector, or is approximately in the shape of a sector, or is in the shape of a pentagon obtained by cutting off a corner of a rectangle.

[0011] In some embodiments, the display panel includes a plurality of pixel units, each of the pixel units includes four sub-pixels, the four sub-pixels are arranged in a 2×2 matrix, and each of the sub-pixels includes a pixel electrode and its corresponding light-emitting portion; the set edges of the main parts of the pixel electrodes of the four sub-pixels are close to each other and form a accommodating area; the connecting parts of the pixel electrodes of the four sub-pixels are arranged close to each other and are located in the accommodating area.

[0012] In some embodiments, the shape formed by the connection line between ends of the connection portions of the four sub-pixels away from the respective main portions is a square.

[0013] In some embodiments, the display panel includes a plurality of pixel units, each of the pixel units includes four sub-pixels, the four sub-pixels are arranged in a 2×2 matrix, and each of the sub-pixels includes a pixel electrode and its corresponding light-emitting portion; along the circumference around the center of the pixel unit, the main parts and connecting parts of the four pixel electrodes of the four sub-pixels are arranged alternately.

[0014] In some embodiments, the connecting portion extends along a tangential direction of a circumference around the center of the pixel unit.

[0015] In some embodiments, among the pixel electrodes of the four sub-pixels, there is at least a pair of two adjacent pixel electrodes that are symmetrically arranged relative to a reference line; wherein the reference line is: perpendicular to the arrangement direction of the two adjacent pixel electrodes and located at the bisector between the two adjacent pixel electrodes.

[0016] In some embodiments, each of the pixel units includes at least a first sub-pixel and a second sub-pixel having the same luminous color, and the first sub-pixel and the second sub-pixel are distributed at two adjacent vertex corners in the pixel unit.

[0017] In some embodiments, each of the pixel units includes at least a first sub-pixel and a second sub-pixel having the same luminous color, and the first sub-pixel and the second sub-pixel are distributed at two opposite vertex corners in the pixel unit.

[0018] In some embodiments, the display panel further includes: an insulating dielectric layer located between the driving circuit layer and the pixel electrode, the insulating dielectric layer is provided with a via hole, the connecting portion is connected to the driving circuit layer through the via hole, and the opening is located in the avoidance area.

[0019] In another aspect, a display device is provided, comprising: a display panel as described in any one of the above embodiments; and a cover plate disposed on a light-emitting side of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, etc. involved in the embodiments of the present disclosure.

[0021] FIG1 is a structural diagram of a display device according to some embodiments;

[0022] FIG2 is a structural diagram of a display panel according to some embodiments;

[0023] FIG3 is a structural diagram of another display panel according to some embodiments;

[0024] FIG4 is a partial structural diagram of a display panel according to some embodiments;

[0025] FIG5 is a structural diagram of another display panel according to some embodiments;

[0026] FIG6A is a structural diagram of another display panel according to some embodiments;

[0027] FIG6B is a structural diagram of another display panel according to some embodiments;

[0028] FIG7 is a structural diagram of another display panel according to some embodiments;

[0029] FIG8 is a structural diagram of another display panel according to some embodiments;

[0030] FIG9 is a structural diagram of another display panel according to some embodiments;

[0031] 10 to 22 are structural diagrams during a manufacturing process of a display panel according to some embodiments. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0033] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as having an open, inclusive meaning, that is, "including, but not limited to." In the description of the specification, the terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0034] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0035] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0036] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0037] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0038] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0039] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0040] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0041] Some embodiments of the present disclosure provide a display device that can be any display device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the display device of the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0042] FIG1 is a structural diagram of a display device according to some embodiments. As shown in FIG1 , the display device 1000 includes a frame 100 , a cover 200 , a display panel 300 , a circuit board 400 , and other electronic components including a camera.

[0043] The frame 100 has a U-shaped longitudinal cross-section. The display panel 300, circuit board 400, and other electronic components including a camera are disposed within the frame 100. The circuit board 400 is located between the display panel 300 and the frame 100. The cover plate 200 is located on the light-emitting side of the display panel 300. The side of the display panel 300 used to display images is the light-emitting side of the display panel 300, and the side facing away from the light-emitting side of the display panel 300 is the non-light-emitting side of the display panel 300.

[0044] Exemplarily, the above-mentioned display panel 300 can be: an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, a micro light emitting diode (Micro LED) display panel or a mini light emitting diode (Mini LED) display panel, etc., and the present disclosure does not make any specific limitations on this.

[0045] In the following, some embodiments of the present disclosure are schematically described by taking the display panel 300 as an OLED display panel as an example.

[0046] In some examples, as shown in FIG. 2 and FIG. 3 , the display panel 300 includes: a substrate 10 , a driving circuit layer 20 , a plurality of pixel electrodes 301 , a pixel definition structure 40 , and a plurality of light-emitting portions 302 .

[0047] There are various types of substrates 10, which can be selected according to actual needs.

[0048] For example, the substrate 10 may be a rigid substrate, such as a glass substrate or a polymethyl methacrylate (PMMA) substrate.

[0049] As another example, the substrate 10 may be a flexible substrate. Specifically, the flexible substrate may be a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate diformic acid glycol ester (PEN) substrate, or a polyimide (PI) substrate. In this case, the display panel 300 may, for example, implement a flexible display.

[0050] Optionally, the substrate 10 may be formed as a single layer, a double layer, or a multi-layer, which is not limited in the embodiments of the present disclosure.

[0051] As shown in Figures 2 and 3, the driver circuit layer 20 is provided on the substrate 10. It is understood that the driver circuit layer 20 refers to the film layer where the multiple pixel circuit arrays are located, including multiple patterned conductive layers and insulating layers. For example, the driver circuit layer 20 includes multiple pixel circuits 210 and multiple signal lines.

[0052] The pixel circuit 210 is generally composed of electronic devices such as thin film transistors (TFTs), capacitors, etc. For example, the pixel circuit 210 can specifically be a structure such as "2T1C", "6T1C", "7T1C", "6T2C" or "7T2C". Here, "T" represents a transistor, such as a thin film transistor. The number before "T" represents the number of transistors. "C" represents a capacitor, and the number before "C" represents the number of capacitors. In the drawings of some embodiments of the present disclosure, only one thin film transistor 211 is used as an example for illustration. For example, the thin film transistor 211 can be a driving transistor.

[0053] Specifically, as shown in FIG2 , the driving circuit layer 20 may include a semiconductor layer 201, a first gate insulating layer 202, a gate metal layer 203, a second gate insulating layer 204, and a source-drain metal layer 205. The semiconductor layer 201 includes an active layer of multiple thin-film transistors 211; the gate metal layer 203 includes gates of the multiple thin-film transistors 211; and the source-drain metal layer 205 includes source and drain electrodes of the multiple thin-film transistors 211.

[0054] It is understood that the thin film transistors included in the driving circuit layer 20 can be top-gate thin film transistors or bottom-gate thin film transistors, which is not limited in the present disclosure. The thin film transistor 211 shown in FIG2 is a top-gate thin film transistor.

[0055] As shown in FIG2 and FIG3 , the pixel electrode 301 is provided on a side of the driving circuit layer 20 away from the substrate 10 . The pixel electrode 301 is connected to the pixel circuit 210 in the driving circuit layer 20 and receives an electrical signal provided by the pixel circuit 210 .

[0056] The material of the pixel electrode 301 may include metals and alloys, such as aluminum (Al), magnesium (Mg), silver (Ag), etc., and may also include metal oxides, such as indium tin oxide (ITO), indium zinc oxide (IZO), etc.

[0057] As shown in Figures 2 and 3, the pixel definition structure 40 is provided on a side of the plurality of pixel electrodes 301 away from the driving circuit layer 20. The pixel definition structure 40 is provided with a plurality of pixel openings 401. Each pixel opening 401 corresponds to a pixel electrode 301, and each pixel opening 401 exposes at least a portion of each pixel electrode 301. For example, the surface of the pixel electrode 301 away from the substrate 10 can be fully exposed through the pixel opening 401, or partially exposed and partially covered by the pixel definition structure 40. The embodiments of the present disclosure are not limited in this regard.

[0058] There are many types of pixel definition structures 40 , which can be selected and set according to actual needs.

[0059] In some examples, as shown in FIG2 , the pixel definition structure 40 includes a pixel definition layer 41. The pixel definition layer 41 defines a plurality of pixel openings 401. The top view of the pixel definition layer 41 resembles a grid, and the plurality of pixel openings 401 constitute meshes of the grid.

[0060] For example, the material used for the pixel defining layer 41 may include at least one of an inorganic insulating material and an organic insulating material, such as silicon nitride (SiNx), silicon oxynitride (SiON), and silicon oxide (SiOx).

[0061] In other examples, as shown in FIG3 , the pixel definition structure 40 includes a pixel defining layer 41 and an isolation structure 42 located on a side of the pixel defining layer 41 away from the plurality of pixel electrodes 301. The orthographic projection of the isolation structure 42 on the substrate 10 is located within the orthographic projection of the pixel defining layer 41 on the substrate 10.

[0062] As shown in FIG3 , the pixel defining layer 41 has a plurality of first openings 411 , each of which exposes at least a portion of a pixel electrode 301 . The material of the pixel defining layer 41 can refer to the description in the above example. The isolation structure 42 has a plurality of second openings 421 . Each first opening 411 is disposed correspondingly to each second opening 421 , and the orthographic projection of the first opening 411 on the substrate 10 is within the orthographic projection of the second opening 421 on the substrate 10 .

[0063] Exemplarily, the isolation structure 42 may be a laminated structure of a metal material, wherein the metal material may be a pure metal material or a metal compound. The metal material includes titanium (Ti), aluminum (Al), molybdenum (Mo) or other ferrous metals. For example, the isolation structure 42 may be a laminated structure of Ti / Al / Ti, wherein the wet etching rates of Ti and Al are different, and an undercut structure (e.g., an "I"-shaped structure) may be formed. The isolation structure 42 may also be a laminated structure of Mo / Al / Mo. The embodiments of the present disclosure are not limited thereto.

[0064] The isolation structure 42 can also be a laminated structure of a metal material and a black organic material, wherein the organic material includes a black resin. The metal material can include a black metal material, such as MoO X .

[0065] It should be noted that the isolation structure 42 can not only be the three-layer structure ("I"-shaped structure) shown in Figure 3, but also a two-layer structure or a four-layer structure, or a structure with more layers. No specific limitation is made here. It is only necessary to ensure that the isolation structure 42 has an undercut structure.

[0066] It should be noted that, when the pixel definition structure 40 includes the pixel definition layer 41 and the isolation structure 42 , the pixel opening 401 included in the pixel definition structure 40 can be understood as the first opening 411 provided in the pixel definition layer 41 .

[0067] As shown in FIG. 2 and FIG. 3 , one light emitting portion 302 is disposed in one pixel opening 401 .

[0068] In some examples, the light emitting portion 302 may include an electroluminescent layer (EL).

[0069] In other examples, the light-emitting portion 302 includes, in addition to the light-emitting layer, one or more of an electron transport layer (ETL), an electron injection layer (EIL), a hole blocking layer (HBL), a hole transport layer (HTL), an electron blocking layer (EBL), and a hole injection layer (HIL). When the display panel 300 is an organic electroluminescent display panel, the light-emitting layer is an organic light-emitting layer. When the display panel 300 is a quantum dot electroluminescent display panel, the light-emitting layer is a quantum dot light-emitting layer.

[0070] As shown in Figures 2 and 3, the display panel 300 further includes a plurality of common electrodes 303 disposed on a side of the light-emitting portion 302 away from the pixel electrodes 301. The material used for the common electrodes 303 may include a (semi-)transparent layer comprising at least one or more of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), gold (Au), nickel (Ni), chromium (Cr), and lithium (Li). For example, the material used for the common electrodes 303 may include a multilayer structure formed of a Ti / Al / Ti stacked metal.

[0071] In some examples, multiple common electrodes 303 are connected to each other to form a common electrode layer.

[0072] In other examples, multiple common electrodes 303 are isolated from each other. For example, when the pixel definition structure 40 includes a pixel definition layer 41 and an isolation structure 42, the isolation structure 42 can isolate any two common electrodes 303, that is, two adjacent common electrodes 303 are spaced apart and not directly connected. However, two adjacent common electrodes 303 can be electrically connected, for example, two adjacent common electrodes 303 can be electrically connected through the isolation structure 42. In this way, it can be ensured that the light-emitting portions 302 located in each pixel opening 401 can receive approximately the same electrical signal transmitted by the common electrode 303, which is beneficial to improving the accuracy of the electrical signals received by the multiple light-emitting portions 302, and further beneficial to improving the display uniformity of the display panel 300.

[0073] It is understood that the overlapping portion of the pixel electrode 301, the light-emitting portion 302, and the common electrode 303 forms the light-emitting device 30. Optionally, the pixel electrode 301 serves as the anode of the light-emitting device 30, and the common electrode 303 serves as the cathode of the light-emitting device 30. When a voltage is applied to the pixel electrode 301 and the common electrode 303, an electric field is generated between the two, which can drive the holes in the pixel electrode 301 and the electrons in the common electrode 303 to recombine in the light-emitting portion 302, thereby emitting light.

[0074] The pixel electrodes 301 of the light-emitting devices 30 are electrically connected to the pixel circuits 210. The pixel circuits 210 can generate drive signals and transmit the drive signals to the corresponding light-emitting devices 30 to control the light-emitting state of the light-emitting devices 30. The light-emitting state includes, for example, whether the light-emitting device 30 is emitting light or the brightness of the light-emitting device 30. Multiple pixel circuits 210 jointly control the light-emitting state of the light-emitting devices 30, thereby enabling the display panel 300 to display images.

[0075] In some examples, as shown in FIG2 , at least one insulating dielectric layer 50 is provided between the pixel electrode 301 and the driving circuit layer 20. The material used for the insulating dielectric layer 50 may include an organic insulating material, or an inorganic and organic insulating material. For example, the organic insulating material includes at least one of a general polymer such as polymethyl methacrylate (PMMA) and polystyrene (PS), a polymer derivative having a phenolic group, an acryl polymer, an imide polymer, an aryl ether polymer, an amide polymer, a fluorine polymer, a paraxylene polymer, and a vinyl alcohol polymer. For example, the material used for the insulating dielectric layer 50 includes polyimide.

[0076] As shown in FIG2 , a via hole 501 is provided on the insulating dielectric layer 50 , and the pixel electrode 301 is electrically connected to the driving circuit layer 20 through the via hole 501 .

[0077] In one implementation, to meet the high pixel density (Pixel Per Inch, PPI) requirement of the display panel 300, the distance between two adjacent pixel openings 401 is set very small, and the via 501 can only be provided in the pixel opening area. For example, as shown in Figures 2 and 4, the orthographic projection of the via 501 on the substrate 10 is located within the orthographic projection of the pixel opening 401 on the substrate 10. The orthographic projection of the portion of the pixel electrode 301 used for connecting to the pixel circuit 210 on the substrate 10 is located within the orthographic projection of the pixel opening 401 on the substrate 10, and the pixel electrode 301 is electrically connected to the pixel circuit 210 through the via 501.

[0078] It will be understood by those skilled in the art that the light-emitting device 30 has high requirements on the flatness of the surface on which it is set. The flatter the surface on which it is set, the better the light-emitting quality of the light-emitting device 30. If the surface on which it is set is uneven, the light-emitting quality of the light-emitting device 30 will be greatly affected.

[0079] In the embodiments shown in Figures 2 to 4, since the orthographic projection of the above-mentioned via 501 on the substrate 10 is located within the orthographic projection of the pixel opening 401 on the substrate 10, there is a step difference in the surface where the pixel electrode 301 contacts the light-emitting portion 302 (that is, the surface of the portion of the pixel electrode 301 exposed by the pixel opening 401), and thus there is a step difference in the light-emitting portion 302, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, and there are differences in the light-emitting angles at different positions of the light-emitting device 30, which seriously affects the light-emitting quality of the light-emitting device 30, causing the color presented by the light-emitting device 30 observed by the observer to have color deviation, affecting the display effect of the display panel 300.

[0080] In other implementations, in order to solve the problem of difficulty in aligning the display panel to be evaporated and the FMM when using a high-precision metal mask (FMM) to perform full-layer evaporation to form a light-emitting layer, and the difficulty in preparation, a photolithography process is used to prepare the light-emitting portion 302 and the common electrode 303.

[0081] The aforementioned "photolithography process" may include: after forming the entire light-emitting layer and common electrode layer, coating the common electrode layer with photoresist, then placing a mask on the side of the photoresist away from the substrate, exposing and developing the photoresist through the mask, removing the exposed portions of the photoresist while retaining the unexposed portions, thereby forming a patterned photoresist; then, etching the light-emitting layer and the common electrode layer using the patterned photoresist as a mask, removing the portions of the light-emitting layer and the common electrode layer not blocked by the patterned photoresist, thereby obtaining a plurality of light-emitting portions 302 and a common electrode 303. Finally, the display panel 300 to be formed may be placed in a stripping solution to dissolve and strip off the patterned photoresist layer.

[0082] When the orthographic projection of the above-mentioned via 501 on the substrate 10 is located within the orthographic projection of the pixel opening 401 on the substrate 10, and part of the light-emitting layer and part of the common electrode layer are located within the via 501, in the process of using a photolithography process to prepare the light-emitting portion 302 and the common electrode 303, the part of the light-emitting layer and the common electrode layer located in the via 501 is prone to insufficient etching, resulting in film layer residues of the light-emitting layer and the common electrode layer in the via 501, causing the display panel 300 to produce small black spots (Growing Dark Spot, GDS) defects, affecting the display effect of the display panel 300.

[0083] Based on this, in the embodiments of the present disclosure, further improvements are made to the display panel 300. As shown in FIG5, FIG5 is a structural diagram of the display panel 300 provided in some embodiments of the present disclosure.

[0084] As shown in FIG5 , the display panel 300 includes a plurality of rectangular sub-pixel areas AA. Each sub-pixel area AA includes an adjacent luminous area A1 and an avoidance area A2. The avoidance area A2 includes a vertex of the rectangle. The area of ​​the rectangle except the avoidance area A2 is the luminous area A1.

[0085] Among them, one sub-pixel is set in a sub-pixel area AA. Multiple sub-pixels are arranged in multiple rows and columns, with sub-pixels in each row arranged along the X direction and sub-pixels in each column arranged along the Y direction. Sub-pixels are the smallest unit for displaying images on the display panel 300. Each sub-pixel can display a single color, such as red, blue, or green. By adjusting the brightness (grayscale) of sub-pixels of different colors, and then combining and superimposing colors, multiple colors can be displayed, thereby realizing full-color picture display on the display panel 300.

[0086] One sub-pixel includes a pixel circuit and a light emitting device. In one sub-pixel, the light emitting device 30 is located in the light emitting area A1.

[0087] The shapes of the light emitting area A1 and the avoidance area A2 can be set in a variety of ways and can be selected according to actual needs.

[0088] In some examples, as shown in FIG. 6A , the shape of the light-emitting area A1 may be a pentagon, a trapezoid, or other regular polygons formed by missing one vertex corner of a rectangle.

[0089] When the shape of the light-emitting area A1 is a regular polygon, the shape of the avoidance area A2 is also a regular polygon. For example, as shown in FIG6A , when the shape of the light-emitting area A1 is a pentagon, the shape of the avoidance area A2 can be a triangle.

[0090] In other examples, the light-emitting area A1 may be a special-shaped light-emitting area. The special-shaped light-emitting area may have various shapes, which are not limited in the embodiments of the present disclosure.

[0091] It should be noted that the term "irregular-shaped light-emitting area" is used only to distinguish it from other shaped light-emitting areas (e.g., trapezoidal light-emitting areas). The shape of an "irregular-shaped light-emitting area" can be an irregular closed shape composed of arc segments and straight line segments, or an irregular shape composed of multiple straight line segments. For example, as shown in Figure 5, the aforementioned irregular-shaped light-emitting area A1 is an irregular closed shape composed of two right-angled sides and one arcuate side.

[0092] In addition, when the light-emitting area A1 is a special-shaped light-emitting area, the avoidance area A2 is a special-shaped avoidance area. The special-shaped avoidance area and the special-shaped light-emitting area cooperate with each other to form a rectangular sub-pixel area AA.

[0093] The pixel opening 401 of the pixel definition structure 40 is disposed in the light-emitting area A1, and the shape of the pixel opening 401 is the same as that of the light-emitting area A1. For example, the shape of the light-emitting area A1 and the shape of the pixel opening 401 are both regular polygons (e.g., pentagons). In another example, the shape of the light-emitting area A1 and the shape of the pixel opening 401 are both irregular shapes (e.g., fan-shaped).

[0094] 5 , the pixel electrode 301 includes a main body 31 and a connecting portion 32 . The main body 31 has the same shape as the pixel opening 401 . The connecting portion 32 is located in the avoidance area A2 and is connected to the driving circuit layer 20 .

[0095] For example, when the shape of the pixel opening 401 is a regular polygon (e.g., a pentagon), the shape of the main body 31 is also a regular polygon (e.g., a pentagon); when the shape of the pixel opening 401 is an irregular shape (e.g., a fan shape), the shape of the main body 31 is also an irregular shape (e.g., a fan shape). The embodiments of the present disclosure are not limited to this.

[0096] For example, the thickness of the main body portion 31 is uniform without step difference, and the connecting portion 32 has a fault.

[0097] The uniform thickness of the main portion 31 without step differences means that the side of the main portion 31 close to the substrate 10 and the side of the main portion 31 away from the substrate 10 are both on the same horizontal plane. The presence of a discontinuity in the connecting portion 32 means that the side of the main portion 31 close to the substrate 10 and the side of the main portion 31 away from the substrate 10 are not on the same horizontal plane.

[0098] Exemplarily, one end of the connecting portion 32 is electrically connected to the main body portion 31, and the other end of the connecting portion 32 is electrically connected to the pixel circuit 210 in the driving circuit layer 20, thereby realizing an electrical connection between the light-emitting device 30 and the pixel circuit 210, so that the driving signal generated by the pixel circuit 210 can be transmitted to the corresponding light-emitting device 30, thereby controlling the light-emitting state of the light-emitting device 30.

[0099] In the above-mentioned display panel 300, by setting a top corner of the rectangular sub-pixel area AA as the avoidance area A2, and setting the connection portion 32 of the pixel electrode 301 for connecting to the driving circuit layer 20 in the avoidance area A2, it is possible to improve the problem that the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the light-emitting portion 302 are uneven due to the connection portion 32 being set in the light-emitting area A1, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer showing color deviation, thereby improving the display effect of the display panel 300.

[0100] In addition, the connection portion 32 of the pixel electrode 301 is arranged in the avoidance area A2, so that the surface of the portion of the pixel electrode 301 exposed by the pixel opening 401 is relatively flat, which is conducive to the subsequent preparation of structures such as the light-emitting portion 302 and the common electrode 303. It avoids the situation where, when the light-emitting portion 302 and the common electrode 303 are formed using a photolithography process, the surface of the portion of the pixel electrode 301 exposed by the pixel opening 401 has a step difference, resulting in insufficient etching of the light-emitting layer and the common electrode layer, and the presence of residual film layer, which causes the display panel 300 to produce a GDS defect, thereby improving the yield of the display panel 300.

[0101] In some embodiments, as shown in FIG5 , the boundary of the main body portion 31 includes two connected right-angled sides L and a set side M. One end of the two right-angled sides L is connected and forms a right angle, and the two ends of the two right-angled sides L, which are separated from each other, are respectively connected to the ends of the set side M. The set side M includes an arc segment M1. One end of the connecting portion 32 is connected to the arc segment M1 of the boundary of the main body portion 31, and the other end of the connecting portion 32 extends away from the main body portion 31 and is connected to the driving circuit layer 20.

[0102] For example, as shown in FIG5 , the two right-angled sides L are respectively a first right-angled side L1 and a second right-angled side L2. The first right-angled side L1 is parallel to the row direction X in which the multiple sub-pixels included in the pixel arrangement structure are arranged, and the second right-angled side L2 is parallel to the column direction Y in which the multiple sub-pixels included in the pixel arrangement structure are arranged. One end of the first right-angled side L1 is connected to one end of the set side M, and the second right-angled side L2 is connected to the other end of the set side M. The end of the first right-angled side L1 away from the set side M is connected to the end of the second right-angled side L2 away from the set side M, so that the first right-angled side L1, the second right-angled side L2 and the set side M can form a closed pattern. The first right-angled side L1 and the second right-angled side L2 intersect at a right angle.

[0103] In addition, the arc segment M1 included in the set side M can be bent toward the above-mentioned right angle or away from the above-mentioned right angle. The embodiments of the present disclosure do not limit this. For example, the arc segment M1 is bent away from the above-mentioned right angle, as shown in Figure 5. Therefore, by setting one vertex of the rectangular sub-pixel area AA as the avoidance area A2, the connection portion 32 of the pixel electrode 301 for connecting to the driving circuit layer 20 is set in the avoidance area A2, so that the main body 31 of the pixel electrode 301 located at the pixel opening 401 is flat and has no step difference, and then the light-emitting portion 302 is flat and has no step difference, thereby ensuring the light-emitting quality of the light-emitting device 30, and also ensuring that the area of ​​the light-emitting area A1 of the light-emitting device 30 is large, thereby ensuring the aperture ratio of the display panel 300.

[0104] It can be understood that by setting the lengths of the first right-angled side L1 and the second right-angled side L2 , the size of the rectangular sub-pixel area AA can be adjusted.

[0105] Furthermore, the lengths of the first right-angled side L1 and the second right-angled side L2 may be the same or different. The embodiments of the present disclosure are not limited thereto. For example, as shown in FIG5 , the lengths of the first right-angled side L1 and the second right-angled side L2 are the same, thereby improving the regularity of the plurality of pixel electrodes 301.

[0106] As can be seen from the above, the shape of the light-emitting area A1 is the same as that of the main body 31. When the boundary of the main body 31 includes two connected right-angled sides L and a set side M, the boundary of the light-emitting area A1 includes the two right-angled sides of the rectangular sub-pixel area AA and a side that substantially coincides with the set side M of the main body 31. The closed area formed by this side and the other two right-angled sides of the rectangular sub-pixel area AA constitutes the avoidance area A2.

[0107] In this embodiment, the shape of the main body 31 is defined through the above-mentioned setting, that is, the shape of the light-emitting area A1 is defined. The boundary of the light-emitting area A1 includes two right-angled sides of the rectangular sub-pixel area AA and a side that basically coincides with the set side M of the main body 31. The avoidance area A2 includes a vertex corner of the rectangular sub-pixel area AA. By arranging the connecting portion 32 of the pixel electrode 301 in the avoidance area A2, the problem of the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the unevenness of the light-emitting portion 302 caused by the connecting portion 32 being arranged in the light-emitting area A1 is improved, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer showing color deviation, thereby improving the display effect of the display panel 300.

[0108] It should be noted that there are multiple ways to set the edge M, and you can choose the setting according to actual needs.

[0109] In one implementation, as shown in FIG5 , the set side M only includes an arc segment M1 , and two ends of the arc segment M1 are respectively connected to two ends of the two right-angled sides L that are far away from each other.

[0110] For example, one end of the first right-angled side L1 is connected to one end of the arc segment M1, and the second right-angled side L2 is connected to the other end of the arc segment M1. The end of the first right-angled side L1 away from the arc segment M1 is connected to the end of the second right-angled side L2 away from the arc segment M1, so that the first right-angled side L1, the second right-angled side L2, and the arc segment M1 can form a closed pattern.

[0111] The shape of the light-emitting area A1 is the same as that of the main body 31. Where the boundary of the main body 31 includes two connected right-angled sides L and an arc segment M1, the boundary of the light-emitting area A1 includes two right-angled sides of the rectangular sub-pixel area AA and a side that substantially coincides with the arc segment M1. The closed area formed by this side and the other two right-angled sides of the rectangular sub-pixel area AA constitutes the avoidance area A2.

[0112] By adopting the above-mentioned arrangement, the shape of the main body 31 is defined, that is, the shape of the light-emitting area A1 is defined. The boundary of the light-emitting area A1 includes two right-angled sides of the rectangular sub-pixel area AA and a side that basically coincides with the arc segment M1. The avoidance area A2 includes a vertex corner of the rectangular sub-pixel area AA. By arranging the connecting portion 32 of the pixel electrode 301 in the avoidance area A2, the problem of the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the unevenness of the light-emitting portion 302 caused by the connecting portion 32 being arranged in the light-emitting area A1 is improved, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer showing color deviation, thereby improving the display effect of the display panel 300.

[0113] In addition, the boundary of the light-emitting area A1 includes two right-angled sides of the rectangular sub-pixel area AA and a side that basically coincides with the arc segment M1. The arc segment M1 is relatively smooth, which reduces the protrusion of the boundary of the light-emitting area A1 and reduces the visual jaggedness at the arc segment, further improving the display effect of the display panel 300.

[0114] In another implementation, as shown in FIG6B , the set side M further includes two straight line segments M2 , which are respectively located at both ends of the arc segment M1 , and the straight line segment M2 is connected to one end of the arc segment M1 and one end of a right-angled side L.

[0115] For example, as shown in FIG6B , the two straight line segments M2 are a first straight line segment M21 and a second straight line segment M22. The first straight line segment M21 is parallel to the row direction X of the plurality of sub-pixels arranged in the pixel arrangement structure, and the second straight line segment M22 is parallel to the column direction Y of the plurality of sub-pixels arranged in the pixel arrangement structure.

[0116] For example, one end of the first straight segment M21 is connected to one end of the arc segment M1, and the second straight segment M22 is connected to the other end of the arc segment M1. The end of the first straight segment M21 away from the arc segment M1 is connected to the end of the second right-angled side L2 away from the first right-angled side L1, and the end of the second straight segment M22 away from the arc segment M1 is connected to the end of the first right-angled side L1 away from the second right-angled side L2, so that the first right-angled side L1, the second right-angled side L2, the first straight segment M21, the second straight segment M22, and the arc segment M1 can form a closed pattern. The first straight segment M21 intersects the second right-angled side L2 at a right angle, and the second straight segment M22 intersects the first right-angled side L1 at a right angle.

[0117] Furthermore, the lengths of the first straight line segment M21 and the second straight line segment M22 can be the same or different. The embodiments of the present disclosure are not limited thereto. For example, as shown in FIG6B , the first straight line segment M21 and the second straight line segment M22 are the same length, thereby improving the regularity of the pixel electrode 301 and facilitating the preparation of the pixel electrode 302.

[0118] It is understood that, assuming the lengths of the first and second right-angled sides L1 and L2 of the main body 31 remain constant, changing the length of the straight segment M2 in the set side M will result in a corresponding change in the area of ​​the main body 31. For example, assuming the lengths of the first and second right-angled sides L1 and L2 of the main body 31 remain constant, a longer straight segment M2 will increase the area of ​​the main body 31, while a shorter straight segment M2 will decrease the area of ​​the main body 31.

[0119] As can be seen from the above, the shape of the light-emitting area A1 is identical to that of the main body 31, and their area is substantially the same. When the side M is configured to include two straight line segments M2, the area of ​​the main body 31 is larger, and thus the area of ​​the light-emitting area A1 is larger. Furthermore, by adjusting the length of the straight line segments M2, the area of ​​the light-emitting area A1 can be maximized, thereby increasing the aperture ratio of the display panel 300.

[0120] In addition, when the boundary of the main body 31 includes the set edge M and also includes two straight line segments M2, the boundary of the light-emitting area A1 includes two right-angled sides of the rectangular sub-pixel area AA and a side edge that basically coincides with the set edge M, and the side edge also includes two straight line segments and an arc segment.

[0121] By adopting the above-mentioned setting, the shape of the main body 31 is limited, that is, the shape of the light-emitting area A1 is limited, and one vertex corner of the rectangular sub-pixel area AA is set as the avoidance area A2. The connecting portion 32 of the pixel electrode 301 is set in the avoidance area A2, thereby improving the problem that the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the light-emitting portion 302 are uneven due to the connection portion 32 being set in the light-emitting area A1, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer showing color deviation, thereby improving the display effect of the display panel 300.

[0122] In addition, by adjusting the lengths of the straight line segment M2 and the arc segment M1 of the set edge M, the area of ​​the main body 31 can be adjusted. The shape of the light-emitting area A1 is the same as the shape of the main body 31, and the area of ​​the light-emitting area A1 is basically the same as the area of ​​the main body 31. That is, the area of ​​the light-emitting area A1 can be set as needed.

[0123] In some embodiments, the radius of curvature of the arc segment M1 is less than or equal to the size of the right-angled side L.

[0124] 5 , the curvature radius of the arc segment M1 is equal to the size of the right-angled side L. At this time, the center of the arc segment M1 coincides with the intersection of the two right-angled sides L.

[0125] 6B , the radius of curvature of the arc segment M1 is smaller than the size of the right-angled side L. For example, the radius of curvature of the arc segment M1 is equal to half the size of the right-angled side L. In this case, the center of the arc segment M1 is located within the right angle formed by the intersection of the two right-angled sides L.

[0126] As shown in FIG5 and FIG6B , when the dimensions of the two right-angled sides of the light-emitting area A1 are constant, the curvature radius of the arc segment M1 varies, and the orthographic projection area of ​​the main portion 31 on the substrate 10 also varies. In other words, the area of ​​the main portion 31 can be set by setting the curvature radius of the arc segment M1.

[0127] As can be seen from the above, the shape of the light-emitting area A1 is identical to that of the main body 31 and has substantially the same area. In this embodiment, by setting the radius of curvature of the arc segment M1, the area of ​​the main body 31, and therefore the area of ​​the light-emitting area A1, can be set. This makes the area of ​​the light-emitting area A1 editable, meaning that the area of ​​the light-emitting area A1 can be set according to actual needs. For example, setting the area of ​​the light-emitting area A1 larger can increase the aperture ratio of the display panel 300, thereby increasing the service life of the display panel 300.

[0128] In some embodiments, the orthographic projection of the main body portion 31 on the substrate 10 is in the shape of a sector, or is approximately in the shape of a sector, or is in the shape of a polygon obtained by cutting off a corner of a rectangle.

[0129] The term "approximately fan-shaped" means that the orthographic projection of the main body portion 31 on the substrate 10 is generally fan-shaped, but is not limited to a standard fan-shaped shape. For example, as shown in FIG6B , if the set side M of the main body portion 31 includes an arc segment M1 and two straight line segments M2 located at either end of the arc segment M1, the orthographic projection of the main body portion 31 on the substrate 10 is approximately fan-shaped.

[0130] As can be seen from the above, the shape of the light-emitting area A1 is the same as the shape of the main body 31. For example, if the orthographic projection of the main body 31 on the substrate 10 is a sector, the shape of the light-emitting area A1 is also a sector. For another example, if the orthographic projection of the main body 31 on the substrate 10 is a polygon obtained by cutting off a corner of a rectangle, the shape of the light-emitting area A1 is also a polygon obtained by cutting off a corner of the rectangle.

[0131] In this embodiment, the shape of the main body 31 is limited, that is, the shape of the light-emitting area A1 is limited, so that the shape of the light-emitting area A1 is a sector formed by missing a corner of a rectangle, approximately a sector or a polygon, the avoidance area A2 includes a vertex corner of the rectangular sub-pixel area AA, and the connecting portion 32 of the pixel electrode 301 is arranged in the avoidance area A2, which improves the problem that the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the light-emitting portion 302 are uneven due to the connection portion 32 being arranged in the light-emitting area A1, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer showing color deviation, thereby improving the display effect of the display panel 300.

[0132] In some embodiments, as shown in Figure 7, the display panel 300 includes a plurality of pixel units Q, each pixel unit Q includes four sub-pixels P, the four sub-pixels P are arranged in a 2×2 matrix, and each sub-pixel P includes a pixel electrode 301 and its corresponding light-emitting portion 302 (not shown in the figure); the set edges M of the main portions 31 of the pixel electrodes 301 of the four sub-pixels P are close to each other and form a accommodating area R; the connecting portions 32 of the pixel electrodes 301 of the four sub-pixels P are arranged close to each other and are located in the accommodating area R.

[0133] For example, one sub-pixel P is disposed within a sub-pixel region AA, and each pixel unit Q includes four sub-pixels P. That is, the region within each pixel unit Q is composed of four sub-pixel regions AA. The sub-pixel regions AA are rectangular in shape, and the four sub-pixel regions AA within each pixel unit region are arranged in a 2×2 matrix, forming a square. This ensures a more compact arrangement of the multiple pixel units Q, improving space utilization of the display panel 300 and thereby facilitating pixel density improvement of the display panel 300.

[0134] Exemplarily, as shown in FIG6B , a plurality of pixel units Q are arranged in multiple rows and columns, with the pixel units Q in each row arranged along the X direction and the pixel units Q in each column arranged along the Y direction.

[0135] It should be noted that each sub-pixel P further includes a common electrode 303 . A pixel electrode 301 and its corresponding light-emitting portion 302 and the common electrode 303 together form a light-emitting device 30 .

[0136] The four sub-pixels P included in each pixel unit Q include at least a red sub-pixel, a blue sub-pixel, and a green sub-pixel. Exemplarily, the light-emitting device 30 in the red sub-pixel is configured to emit red light, the light-emitting device 30 in the blue sub-pixel is configured to emit blue light, and the light-emitting device 30 in the green sub-pixel is configured to emit green light. In other examples, the light-emitting devices 30 in the red sub-pixel, the green sub-pixel, and the blue sub-pixel are all configured to emit white light; in this case, the display panel 300 may also include a red filter located in the red sub-pixel, a green filter located in the green sub-pixel, and a blue filter located in the blue sub-pixel. The embodiments of the present disclosure are not limited to this.

[0137] It is understood that any two light-emitting devices 30 are separated by a pixel definition structure 40. Each sub-pixel area AA includes an adjacent light-emitting area A1 and an avoidance area A2, wherein the light-emitting device 30 is located in the light-emitting area A1 and the pixel definition structure 40 is located in the avoidance area A2. When the set edges M of the main portions 31 of the pixel electrodes 302 of the four sub-pixels P included in each pixel unit Q are close to each other and enclose a receiving area R, the pixel definition structures 40 between the light-emitting devices 30 in the four sub-pixels P are connected to form an integrated arrangement and are located in the aforementioned receiving area R.

[0138] With the above arrangement, the connection portion 32 of the pixel electrode 301 is positioned in the aforementioned avoidance area A2. This improves the problem of unevenness in the area of ​​the pixel electrode 301 that overlaps the light-emitting portion 302 and the light-emitting portion 302, caused by the connection portion 32 being positioned in the light-emitting area A1. This causes the light-emitting surfaces of the light-emitting device 30 to be non-identical, resulting in different light emission angles at different locations and a color shift observed by the observer. Furthermore, the pixel definition structure 40 between the light-emitting devices 30 in the four sub-pixels P included in each pixel unit Q is connected in an integrated arrangement. When forming the pixel definition structure 40, the pixel definition structure 40 between the light-emitting devices 30 in the four sub-pixels P corresponds to an opening in the mask, thereby reducing the precision requirements for the mask.

[0139] In some embodiments, as shown in FIG. 7 , the shape formed by the connection line between the ends of the connection portions 32 of the four sub-pixels P away from the respective main portions 31 is a square.

[0140] For example, as shown in FIG7 , in a pixel unit Q, a connection line between ends of the connection portions 32 of two sub-pixels P arranged along the X direction and located in the same row, which are away from their respective main body portions 31, is parallel to the X direction; a connection line between ends of the connection portions 32 of two sub-pixels P arranged along the Y direction and located in the same column, which are away from their respective main body portions 31, is parallel to the Y direction.

[0141] 7 , the connection portions 32 of two sub-pixels P in the same row in a pixel unit Q are symmetrically arranged about a bisector perpendicular to the row direction X in which the sub-pixels are arranged and located between the two sub-pixels P.

[0142] 7 , the connection portions 32 of two sub-pixels P in the same column in a pixel unit Q are symmetrically arranged about a bisector perpendicular to the column direction Y in which the sub-pixels are arranged and between the two sub-pixels P.

[0143] Thus, the connection portions 32 of the four sub-pixels P are evenly distributed in one pixel unit Q, so that the loads of the pixel electrodes 301 are roughly the same, which is beneficial to reducing the differences in signals received by the pixel electrodes 301 and improving the display uniformity of the display panel 300.

[0144] In some other embodiments, as shown in FIG. 8 , along a circumferential direction ZZ around the center of the pixel unit Q, the main portions 31 and the connecting portions 32 of the four pixel electrodes 301 of the four sub-pixels P are alternately arranged.

[0145] 8 , the main bodies 31 of the four pixel electrodes 301 of the four sub-pixels P are arranged in a pinwheel shape. For example, of the main bodies 31 of two adjacent pixel electrodes 301, the main body 31 of one pixel electrode 301 is rotated 90° in the same direction (e.g., clockwise) around the center point of the pixel unit Q to overlap with the main body 31 of the other pixel electrode 301.

[0146] In some embodiments, as shown in FIG. 8 , the connection portion 32 extends along a tangent direction aa of a circumferential direction ZZ surrounding the center of the pixel unit Q.

[0147] For example, as shown in FIG8 , the set edge M of the main body portion 31 overlaps with a circle around the center of the pixel unit Q. The end of the connecting portion 32 close to the main body portion 31 is connected to the portion of the set edge M located at the overlapping position. The connecting portion 32 extends along a tangent line at the overlapping position of the circle around the center of the pixel unit Q. This improves the uniformity of the arrangement of the sub-pixels P.

[0148] In some embodiments, among the pixel electrodes 301 of the four sub-pixels P included in a pixel unit Q, there is at least a pair of adjacent two pixel electrodes 301 that are symmetrically arranged relative to a reference line aa; wherein the reference line aa is: perpendicular to the arrangement direction of the two adjacent pixel electrodes 301 and located at the bisector between the two adjacent pixel electrodes 301.

[0149] In some examples, as shown in FIG7 , among the pixel electrodes 301 of the four sub-pixels P included in a pixel unit Q, there are two pairs of adjacent pixel electrodes 301 that are symmetrically arranged with respect to a reference line aa. For example, in the pixel unit Q, the pixel electrode 301 of the upper-left sub-pixel P and the pixel electrode 301 of the upper-right sub-pixel P are symmetrically arranged with respect to the reference line aa; and the pixel electrode 301 of the lower-left sub-pixel P and the pixel electrode 301 of the lower-right sub-pixel P are symmetrically arranged with respect to the reference line aa.

[0150] In some examples, as shown in FIG6B , the four sub-pixels P in the figure may constitute a pixel unit Q, in which a pair of adjacent pixel electrodes 302 are symmetrically arranged with respect to a line bisector perpendicular to the arrangement direction of the two adjacent pixel electrodes 301 and located between the two adjacent pixel electrodes 301. For example, in the pixel unit Q, the pixel electrode 302 of the sub-pixel P in the lower left corner and the pixel electrode 302 of the sub-pixel P in the upper right corner are symmetrically arranged with respect to a line bisector perpendicular to the arrangement direction of the two adjacent pixel electrodes 301 and located between the two adjacent pixel electrodes 301.

[0151] With the above arrangement, among the pixel electrodes 302 of the four sub-pixels P included in a pixel unit Q, at least one pair of adjacent two pixel electrodes 302 are symmetrically arranged relative to the reference line aa, thereby improving the arrangement uniformity of the multiple sub-pixels P, reducing the difficulty of the preparation process of the multiple sub-pixels P, reducing the pattern complexity of the evaporation mask plate, and simplifying the composition process.

[0152] In some embodiments, as shown in FIG7 and FIG8 , each pixel unit Q includes at least a first sub-pixel P1 and a second sub-pixel P2 having the same luminous color. The first sub-pixel P1 and the second sub-pixel P2 are distributed at two adjacent vertex corners in the pixel unit Q.

[0153] It should be noted that the shape of the orthographic projection of a pixel unit Q on the substrate 10 is a rectangle, and “two adjacent vertex corners in the pixel unit Q” refer to two vertex corners formed between one side of the rectangle and its two adjacent sides.

[0154] In some examples, the arrangement direction of the first sub-pixel P1 and the second sub-pixel P2 is parallel to the column direction Y of the plurality of sub-pixels, as shown in FIG7 . In other examples, the arrangement direction of the first sub-pixel P1 and the second sub-pixel P2 is parallel to the row direction X of the plurality of sub-pixels. The embodiments of the present disclosure are not limited to this.

[0155] For example, the first subpixel P1 and the second subpixel P2 may be blue subpixels. The efficiency of the luminescent material of blue subpixels is relatively low. By providing two blue subpixels in each pixel unit Q, the effective luminous area of ​​the blue subpixel in a pixel unit Q is maximized, thereby reducing color shift problems caused by the different luminous efficiencies of red, green, and blue subpixels.

[0156] In some implementations, when manufacturing the display panel 300, a high-precision metal mask (FMM) is used to separately manufacture light-emitting portions 302 of different colors. The high-precision metal mask has openings corresponding to the light-emitting portions 302 of the same color.

[0157] It is understandable that in order to prevent color crosstalk between two adjacent light-emitting devices 30 , a certain distance is maintained between two adjacent pixel openings 401 of the pixel definition structure 40 .

[0158] In the above-mentioned embodiment of the present disclosure, the first sub-pixel P1 and the second sub-pixel P2 are located at two adjacent vertex corners in the pixel unit Q and are arranged adjacent to each other. The first sub-pixel P1 and the second sub-pixel P2 emit the same luminous color. Therefore, in the process of forming the luminous portions 302 of the first sub-pixel P1 and the second sub-pixel P2, the problem of cross-color between the first sub-pixel P1 and the second sub-pixel P2 can be temporarily ignored. Therefore, in the high-precision metal mask used to prepare the luminous portions 302 of the first sub-pixel P1 and the second sub-pixel P2, the two openings corresponding to the luminous portions 302 of the first sub-pixel P1 and the second sub-pixel P2 can be connected to form a larger opening (that is, the opening size of the high-precision metal mask at the corresponding positions of the luminous portions 302 of the first sub-pixel P1 and the second sub-pixel P2 is increased). On the one hand, this simplifies the preparation process of the high-precision metal mask, and on the other hand, reduces the difficulty of alignment of the high-precision metal mask process, thereby reducing the probability of color mixing.

[0159] In some embodiments, as shown in FIG. 9 , each pixel unit Q includes at least a first sub-pixel P1 and a second sub-pixel P2 having the same luminous color. The first sub-pixel P1 and the second sub-pixel P2 are distributed at two opposite corners of the pixel unit Q.

[0160] It should be noted that the shape of the orthographic projection of a pixel unit Q on the substrate 10 is a rectangle, and “two opposite vertex corners in the pixel unit Q” refers to two vertex corners at two non-adjacent vertices of the rectangle.

[0161] Exemplarily, the pixel electrodes 301 and the light-emitting portions 302 of the first sub-pixel P1 and the second sub-pixel P2 having the same luminous color have the same shape and area.

[0162] It can be understood that, in addition to the first sub-pixel P1 and the second sub-pixel P2 having the same luminous color, each pixel unit Q also includes: two sub-pixels having luminous colors different from the first sub-pixel P1 and the second sub-pixel P2, and the luminous colors of the two sub-pixels are different.

[0163] With the above-mentioned arrangement, the first sub-pixel P1 and the second sub-pixel P2 having the same luminous color are distributed at two opposite vertex corners in the pixel unit Q. The first sub-pixel P1 and the other two sub-pixels in the pixel unit Q having different luminous colors are arranged adjacent to each other, thereby achieving uniform color mixing and improving the display quality of the display panel 300.

[0164] In some embodiments, the via hole 501 on the insulating dielectric layer 50 is located in the avoidance area A2 , and the connecting portion 32 of the pixel electrode 301 is connected to the driving circuit layer 20 through the via hole 501 .

[0165] In this way, it is possible to improve the problem that the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the light-emitting portion 302 are uneven due to the connection portion 32 being set in the light-emitting area A1, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer is shifted, thereby improving the display effect of the display panel 300; it can also avoid the situation that when the light-emitting portion 302 and the common electrode 303 and other structures are formed by the photolithography process, the light-emitting film and the common electrode layer have residual film layers due to the surface step difference of the part of the pixel electrode 301 exposed by the pixel opening 401, resulting in poor GDS of the display panel 300, thereby improving the yield of the display panel 300.

[0166] An embodiment of the present disclosure provides a method for manufacturing a display panel 300. The display panel 300 includes a plurality of rectangular sub-pixel areas AA. Each sub-pixel area AA includes an adjacent luminous area A1 and a avoidance area A2. The avoidance area A2 includes a vertex of the rectangle. The area of ​​the rectangle excluding the avoidance area A2 is the luminous area A1. The manufacturing method includes: a1 to a2.

[0167] a1, providing a substrate 10.

[0168] The structure of the substrate 10 may refer to the description in some of the above embodiments of the present disclosure, and will not be repeated here.

[0169] a2. A driving circuit layer 20, a plurality of pixel electrodes 301, a pixel definition structure 40, and a plurality of light-emitting portions 302 are formed on the substrate 10.

[0170] The pixel definition structure 40 is provided with a plurality of pixel openings 401. The pixel openings 401 are located in the light-emitting area A1 and have the same shape as the light-emitting area A1. Each pixel opening 401 corresponds to a pixel electrode 301. Each pixel opening 401 can expose the entire pixel electrode 301 or only a portion thereof. The pixel electrode 301 includes a main portion 31 and a connecting portion 32, which are connected to each other. The main portion 31 has the same shape as the pixel opening 401. The connecting portion 32 is located in the avoidance area A2 and is connected to the driving circuit layer 20. A light-emitting portion 302 is located within each pixel opening 401.

[0171] By setting one corner of the rectangular sub-pixel area AA as the avoidance area A2 and positioning the connection portion 32 of the pixel electrode 301 in the avoidance area A2, the problem of unevenness in the area of ​​the pixel electrode 301 that overlaps the light-emitting portion 302 and the light-emitting portion 302 caused by positioning the connection portion 32 in the light-emitting area A1 can be alleviated, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, resulting in different light emission angles at different positions, and causing the color of the light-emitting device 30 observed by the observer to appear shifted, thereby improving the display quality of the display panel 300. Furthermore, this facilitates the subsequent fabrication of structures such as the light-emitting portion 302 and the common electrode 303, avoiding the problem of residual film layers of the light-emitting thin film and the common electrode layer due to the surface step difference of the portion of the pixel electrode 301 exposed by the pixel opening 401 during the formation of the light-emitting portion 302 and the common electrode 303 using a photolithography process, thereby improving the yield of the display panel 300.

[0172] In some examples, the above step a2 may specifically include steps a21 to a23.

[0173] a21 , forming a driving circuit layer 20 on the substrate 10 .

[0174] The driving circuit layer 20 includes a plurality of pixel circuits 210 and a plurality of signal lines, etc. The specific structure of the driving circuit layer 20 can be referred to the description in the above embodiments of the present disclosure, and will not be repeated here.

[0175] Illustratively, the substrate 10 and the driving circuit layer 20 constitute a backplane 01 , as shown in FIG10 .

[0176] a22 , forming a plurality of pixel electrodes 301 on a side of the driving circuit layer 20 away from the substrate 10 .

[0177] For example, a pixel electrode film can be formed by a sputtering process, and then the pixel electrode film is patterned to form a plurality of spaced pixel electrodes 301. For example, the material of the pixel electrode 301 can be an oxide, such as indium tin oxide (ITO) or indium zinc oxide (IZO). The material of the pixel electrode 301 can also be a composite material, such as a composite material composed of a metal material and an oxide material, such as silver (Ag) / ITO, aluminum (Al) / ITO, Ag / IZO, Al / IZO, etc.

[0178] a23 , forming a pixel definition structure 40 and a plurality of light-emitting portions 302 on a side of the pixel electrode 301 away from the driving circuit layer 20 .

[0179] In some examples, when the pixel definition structure 40 includes a pixel definition layer 41, the above-mentioned formation of the pixel definition structure 40 on the side of the pixel electrode 301 away from the driving circuit layer 20 includes: forming a pixel definition film on the side of the pixel electrode 301 away from the driving circuit layer 20, and patterning the pixel definition film to form a pixel definition layer 41 having multiple pixel openings 401.

[0180] The material of the pixel defining layer 41 includes an inorganic material or an organic insulating material.

[0181] For example, when the pixel defining layer 41 is made of inorganic material, a pixel defining film having a certain thickness can be deposited on the side of the pixel electrode 301 away from the driving circuit layer 20 by physical vapor deposition (PVD) or plasma enhanced chemical vapor deposition (PECVD), and then the pixel defining film is patterned using a photolithography process to form a pixel defining layer 41 having multiple pixel openings 401.

[0182] For example, when the pixel defining layer 41 is made of organic material, a coating process can be used to form a pixel defining film with a certain thickness on the side of the pixel electrode 301 away from the driving circuit layer 20, and then the pixel defining film can be patterned using a photolithography process to form a pixel defining layer 41 with multiple pixel openings 401.

[0183] For example, the top view of the pixel defining layer 41 may be roughly a mesh structure, and the plurality of pixel openings 401 constitute meshes of the mesh structure.

[0184] It should be noted that when the pixel defining film is made of an inorganic material, the above-mentioned photolithography process may include: coating a photoresist on the pixel defining film, then placing a mask on the side of the photoresist away from the substrate, exposing and developing the photoresist through the mask, removing the exposed portions of the photoresist, and retaining the unexposed portions of the photoresist, thereby forming a patterned photoresist; then etching the pixel defining film using the patterned photoresist as a mask to remove the portions of the pixel defining film not blocked by the patterned photoresist, forming a plurality of pixel openings 401, and obtaining a pixel defining layer 41. Finally, the display panel 300 to be formed can be placed in a stripping solution to dissolve and strip off the patterned photoresist layer.

[0185] In the case where the pixel defining film is made of organic material, the above-mentioned photolithography process may include: setting a mask plate on the side of the pixel defining film away from the substrate 10, exposing and developing the pixel defining film through the mask plate, removing the exposed part of the pixel defining film, retaining the unexposed part of the pixel defining film, forming multiple pixel openings 401, and obtaining a pixel defining layer 41.

[0186] In other examples, when the pixel definition structure 40 includes a pixel definition layer 41 and an isolation structure 42, a sputtering process can be used to sequentially form a pixel definition film 410 and an isolation film 420, as shown in Figures 10 and 11. The pixel definition film 410 and the isolation film 420 are then patterned (e.g., etched) to form a pixel definition layer 41 having a plurality of first openings 411 and an isolation structure 42 having a plurality of second openings 421. One first opening 411 is corresponding to one second opening 421, and the orthographic projection of the first opening 411 on the substrate 10 is located within the orthographic projection of the second opening 421 on the substrate 10. When the pixel definition structure 40 includes a pixel definition layer 41 and an isolation structure 42, the pixel opening 401 included in the pixel definition structure 40 can be understood as the first opening 411 provided in the pixel definition layer 41.

[0187] Wherein, in the case that the isolation structure 42 is a two-layer structure, sequentially isolating the film 420 by the sputtering process may specifically include: sequentially forming a first sub-isolation film and a second sub-isolation film on the pixel defining film.

[0188] For example, the first sub-isolating film can be made of titanium (Ti), and the second sub-isolating film can be made of aluminum (Al). Due to the different wet etching rates of Ti and Al, during the etching process of the first and second sub-isolating films, the second sub-isolating film is less affected by the etching, while the first sub-isolating film is etched more quickly, facilitating the formation of an undercut structure (e.g., a "T"-shaped structure). Those skilled in the art may also select other suitable materials, as long as they can achieve the aforementioned technical effects, and the embodiments of the present disclosure are not limited thereto.

[0189] In some examples, as shown in FIG10 , before forming the pixel definition structure 40 and the plurality of light-emitting portions 302 on the side of the pixel electrode 301 away from the driving circuit layer 20, the preparation method further includes: forming a plurality of first sacrificial layers 02 on the side of the plurality of pixel electrodes 301 away from the driving circuit layer 20 to protect the pixel electrodes 301 and avoid damage to the pixel electrodes 301 when forming subsequent film layers (for example, the pixel definition structure 40).

[0190] Exemplarily, as shown in FIG. 10 , the orthographic projection of the first sacrificial layer 02 on the substrate 10 is located within the orthographic projection of the pixel electrode 301 on the substrate 10 .

[0191] It should be noted that the multiple light-emitting devices 30 have multiple colors. In the above step a23, the pixel openings 401 corresponding to the light-emitting devices 30 of different colors are produced separately. After the pixel openings 401 corresponding to the light-emitting devices 30 of each preset color are produced, the light-emitting portion 302 and the common electrode 303 of the light-emitting device 30 of the preset color are produced within the pixel openings 401. When producing light-emitting devices 30 of a certain color, the pixel openings 401 corresponding to the light-emitting device 30 of that color are first formed, and then the light-emitting portion 302 and the common electrode 303 of the light-emitting device 30 of that color are formed within the pixel openings 401. Then, the pixel openings 401 corresponding to the light-emitting devices 30 of another color and the light-emitting portion 302 located within the pixel openings 401 are produced.

[0192] In some examples, after the light-emitting portion 302 and common electrode 303 of each preset color light-emitting device 30 are fabricated, an encapsulation sublayer 03 needs to be fabricated. For example, the material of the encapsulation sublayer 03 can be an inorganic material. In the case where the material of the encapsulation sublayer is an inorganic material, a chemical vapor deposition (CVD) process can be used to form the encapsulation sublayer 03.

[0193] Exemplarily, the plurality of light-emitting devices 30 include at least a plurality of first light-emitting devices 310, a plurality of second light-emitting devices 320, and a plurality of third light-emitting devices 330. The plurality of first light-emitting devices 310, the plurality of second light-emitting devices 320, and the plurality of third light-emitting devices 330 emit light of different colors. For example, the first light-emitting devices 310 may emit red light, the second light-emitting devices 320 may emit blue light, and the third light-emitting devices 330 may emit green light.

[0194] In some examples, the above step a23 may specifically include steps a231 to a237.

[0195] a231, combined with FIG10 and FIG11, a plurality of pixel openings 401 corresponding to the first light emitting devices 310 are formed.

[0196] For the convenience of description, the pixel opening 401 corresponding to the first light-emitting device 310 is defined as a first type of pixel opening 4011; the pixel opening 401 corresponding to the second light-emitting device 320 is defined as a second type of pixel opening 4012; and the pixel opening 401 corresponding to the third light-emitting device 330 is defined as a third type of pixel opening 4013.

[0197] As shown in Figures 10 and 11 , forming multiple pixel openings 401 corresponding to the first light-emitting device 30 can specifically include: forming a first shielding layer 04 on a side of the isolation film 420 away from the pixel definition film 410, the first shielding layer 04 having multiple first sub-openings 041 arranged opposite to the pixel openings 401 to be formed, each first sub-opening 041 being arranged opposite to each pixel opening 401 to be formed, and the orthographic projection of the pixel opening 401 to be formed on the substrate 10 being located within the orthographic projection of the first sub-opening 041 on the substrate 10. Using the first shielding layer 04 as a mask, the portions of the pixel definition film 410 and the isolation film 420 not covered by the first shielding layer 04 are etched to form a pixel definition layer 41 having multiple first openings 411 and an isolation structure 42 having multiple second openings 421. The pixel openings 401 included in the pixel definition structure 40 can be understood as the first openings 411 provided in the pixel definition layer 41.

[0198] Exemplarily, the first shielding layer 04 may be a photoresist layer.

[0199] Exemplarily, the preparation method further includes: when multiple first sacrificial layers 02 are formed on the side of the multiple pixel electrodes 301 away from the driving circuit layer 20, in step a231, it also includes etching and removing the first sacrificial layer 02 corresponding to the pixel electrode 301 of the first light-emitting device 310.

[0200] It can be understood that after the pixel opening 401 (ie, the first type of pixel opening 4011 ) corresponding to the first light emitting device 310 is formed, the first shielding layer 04 is peeled off.

[0201] a232, as shown in FIG12, the light-emitting layer 3021, the common electrode layer 3031 and the first encapsulation film 031 of the first light-emitting device 310 are formed in the pixel opening 401 corresponding to the first light-emitting device 310. The first encapsulation film 031 is used to form the encapsulation sublayer 03 corresponding to the first light-emitting device 30.

[0202] Illustratively, a portion of the light-emitting layer 3021 is located within the pixel opening 401, while another portion of the light-emitting layer 3021 is located on the side of the isolation film away from the substrate 10. A portion of the common electrode layer 3031 is located within the pixel opening 401, while another portion of the common electrode layer 3031 is located on the side of the isolation film away from the substrate 10. A portion of the first encapsulation film 031 is located within the pixel opening 401, while another portion of the first encapsulation film 031 is located on the side of the isolation film away from the substrate 10.

[0203] The light-emitting layer 3021 and the common electrode layer 3031 can both be formed using an evaporation process. Because there is a step difference between the isolation structure 42 and the pixel defining layer 41 at the pixel opening 401 (for example, the side of the isolation structure 42 away from the substrate 10 and the side of the pixel defining layer 41 away from the substrate 10 are not on the same horizontal plane), and the thicknesses of the light-emitting layer 3021, the common electrode layer 3031, and the first encapsulation film 031 are relatively small, the portion of the light-emitting layer 3021 located within the pixel opening 401 is disconnected from the portion of the light-emitting layer 3021 located on the side of the isolation film away from the substrate 10; the portion of the common electrode layer 3031 located within the pixel opening 401 is disconnected from the portion of the common electrode layer 3031 located on the side of the isolation film away from the substrate 10; and the portion of the first encapsulation film 031 located within the pixel opening 401 is disconnected from the portion of the first encapsulation film 031 located on the side of the isolation film away from the substrate 10.

[0204] In some examples, after step a232, the preparation method further includes forming a cover film layer on a side of the first encapsulation film 031 away from the common electrode layer 3031, with a portion of the cover film layer located within the pixel opening 401 and another portion of the cover film layer located on a side of the isolation film away from the substrate 10. The cover film layer is used to protect the common electrode layer 3031 to prevent damage to the common electrode layer 3031 caused by subsequent preparation processes.

[0205] a233, as shown in FIG12, a first photoresist layer 05 is formed on a side of the first packaging film 031 away from the common electrode layer 3031, and the first photoresist layer 05 covers the first type pixel opening 4011 and a portion of the pixel definition structure 40 located around the first type pixel opening 4011.

[0206] Illustratively, a coating process may be used to form a first photoresist film on a side of the first encapsulation film 031 away from the common electrode layer 3031 , and then the process is exposed and developed to form the first photoresist layer 05 .

[0207] a234, as shown in Figure 13, using the first photoresist layer 05 as a mask, the portion of the light-emitting layer 3021 of the first light-emitting device 310 that is not covered by the first photoresist layer 05, the portion of the common electrode layer 3031 that is not covered by the first photoresist layer 05, and the portion of the first encapsulation film 031 that is not covered by the first photoresist layer 05 are etched to remove the material layer in the area outside the first-type pixel opening 4011, thereby obtaining the light-emitting portion 302, the common electrode 303 and the encapsulation sublayer 03 of the first light-emitting device 310.

[0208] It is understandable that after the light emitting portion 302 , the common electrode 303 and the encapsulation sublayer 03 of the first light emitting device 310 are formed, the first photoresist layer 05 is stripped off.

[0209] At this point, the preparation of the first light emitting device 310 is completed.

[0210] a235 , as shown in FIG. 14 and FIG. 15 , a plurality of pixel openings 401 corresponding to the second light emitting devices 320 (ie, the second type of pixel openings 4012 ) are formed.

[0211] As shown in Figures 14 and 15 , forming multiple pixel openings 401 corresponding to the second light-emitting devices 320 can specifically include: forming a second shielding layer 06 on a side of the isolation film away from the pixel defining film, the second shielding layer 06 having multiple second sub-openings 061 arranged opposite the pixel openings 401 to be formed, with each second sub-opening 061 arranged opposite each pixel opening 401 to be formed, and the orthographic projection of the pixel opening 401 to be formed on the substrate 10 being located within the orthographic projection of the second sub-opening 061 on the substrate 10. Using the second shielding layer 06 as a mask, the portions of the pixel defining film 410 and the isolation film 420 not covered by the second shielding layer 06 are etched to form a pixel defining layer 41 having multiple first openings 411 and an isolation structure 42 having multiple second openings 421. The pixel openings 401 included in the pixel defining structure 40 can be understood as the first openings 411 provided in the pixel defining layer 41.

[0212] Exemplarily, the second shielding layer 06 may be a photoresist layer.

[0213] It is understandable that after the second type pixel opening 4012 is formed, the second shielding layer 06 is peeled off.

[0214] a236, as shown in FIG16, the light-emitting layer 3021, the common electrode layer 3031 and the second encapsulation film 032 of the second light-emitting device 320 are formed in the pixel opening 401 corresponding to the second light-emitting device 320. The second encapsulation film 032 is used to form the encapsulation sublayer 03 corresponding to the second light-emitting device 320.

[0215] a237 , forming a second photoresist layer 07 on a side of the second encapsulation film 032 away from the common electrode layer 3031 , the second photoresist layer 07 covers the second type pixel opening 412 and a portion of the pixel definition structure 40 located around the second type pixel opening 412 .

[0216] a238, as shown in Figure 17, using the second photoresist layer 07 as a mask, the portion of the light-emitting layer 3021 not covered by the second photoresist layer 07, the portion of the common electrode layer 3031 not covered by the second photoresist layer 07, and the portion of the second encapsulation film 032 not covered by the second photoresist layer 07 are etched to form the light-emitting portion 302, the common electrode 303 and the encapsulation sublayer 03 of the second light-emitting device 320.

[0217] It is understandable that after the light emitting portion 302 , the common electrode 303 and the encapsulation sublayer 03 of the second light emitting device 320 are formed, the second photoresist layer 07 is stripped off.

[0218] At this point, the preparation of the second light emitting device 320 is completed.

[0219] a239, as shown in combination with FIG. 18 and FIG. 19, a plurality of pixel openings 401 corresponding to the third light-emitting devices 330 (ie, the third type of pixel openings 4013) are formed.

[0220] As shown in Figures 18 and 19 , forming multiple pixel openings 401 corresponding to the third light-emitting devices 330 can specifically include: forming a third shielding layer 08 on a side of the isolation film away from the pixel defining film, the third shielding layer 08 having multiple third sub-openings 081 arranged opposite the pixel openings 401 to be formed, with each third sub-opening 081 arranged opposite each pixel opening 401 to be formed, and the orthographic projection of the pixel opening 401 to be formed on the substrate 10 being located within the orthographic projection of the third sub-opening 081 on the substrate 10. Using the third shielding layer 08 as a mask, portions of the pixel defining film 410 and the isolation film 420 not covered by the third shielding layer 08 are etched to form a pixel defining layer 41 having multiple first openings 411 and an isolation structure 42 having multiple second openings 421. The pixel openings 401 included in the pixel defining structure 40 can be understood as the first openings 411 provided in the pixel defining layer 41.

[0221] Exemplarily, the third shielding layer 08 may be a photoresist layer.

[0222] It can be understood that after the third type pixel opening 4013 is formed, the third shielding layer 08 is peeled off.

[0223] a2310, as shown in FIG20 , forms the light-emitting layer 3021, common electrode layer 3031, and third encapsulation film 033 of the third light-emitting device 330 within the pixel opening 401 corresponding to the third light-emitting device 330. The third encapsulation film 033 is used to form the encapsulation sublayer 03 corresponding to the second light-emitting device 320.

[0224] a2311, as shown in FIG20, a third photoresist layer 09 is formed on a side of the third encapsulation film 033 away from the common electrode layer 3031, and the third photoresist layer 09 covers the third type pixel opening 4013 and a portion of the pixel definition structure 40 located around the third type pixel opening 4013.

[0225] a2312, as shown in Figure 21, using the third photoresist layer 09 as a mask, the portion of the light-emitting layer 3021 not covered by the third photoresist layer 09, the portion of the common electrode layer 3031 not covered by the third photoresist layer 09, and the portion of the third encapsulation film 033 not covered by the third photoresist layer 09 are etched to form the light-emitting portion 302, the common electrode 303 and the encapsulation sublayer 03 of the third light-emitting device 330.

[0226] It can be understood that after the light emitting portion 302 , the common electrode 303 and the encapsulation sublayer 03 of the third light emitting device 330 are formed, the third photoresist layer 09 is stripped off.

[0227] At this point, the preparation of the third light emitting device 330 is completed.

[0228] In some examples, as shown in FIG. 22 , after step a2312 , the preparation method further includes: forming an organic encapsulation layer 010 and an inorganic encapsulation layer 011 on a side of the plurality of encapsulation sub-layers 03 away from the substrate 10 .

[0229] Exemplarily, the material of the organic encapsulation layer 010 includes a polymer combination of one or more of an acrylic polymer, a silicon polymer, and an epoxy polymer. The above-mentioned material is produced on each of the above-mentioned encapsulation sublayers 03 by inkjet printing (IJP), and then ultraviolet (UV) curing is performed to form the organic encapsulation layer 010.

[0230] Exemplarily, the material of the inorganic encapsulation layer 011 includes one or more of silicon nitride (SiNx), silicon dioxide (SiOx), and silicon oxynitride (SiON). The inorganic encapsulation layer 011 may be formed using a chemical vapor deposition (CVD) process.

[0231] In some examples, before forming multiple pixel electrodes 301, pixel definition structures 40, light-emitting portions 302 and pixel definition structures 40 on the side of the driving circuit layer 20 away from the substrate 10, an insulating dielectric layer 50 may also be formed on the side of the driving circuit layer 20 away from the substrate 10.

[0232] For example, the insulating dielectric layer 50 can make the surface of the driving circuit layer 20 smoother, which is beneficial for the subsequent preparation of structures such as the pixel electrode 301. The insulating dielectric layer 50 can be made of an organic material and can be formed using an inkjet printing process.

[0233] In the preparation method of the display panel 300 provided in the embodiment of the present disclosure, a vertex corner of the rectangular sub-pixel area AA is set as the avoidance area A2, and the connection portion 32 of the pixel electrode 301 is set in the avoidance area A2, and is electrically connected to the driving circuit layer 20 through the via 501 of the insulating medium layer 50 located in the avoidance area A2. On the one hand, it can improve the problem that the area of ​​the pixel electrode 301 overlapping with the light-emitting portion 302 and the light-emitting portion 302 are uneven due to the connection portion 32 being set in the light-emitting area A1, resulting in the light-emitting surface of the light-emitting device 30 not being on the same surface, the light-emitting angles at different positions being different, and the color of the light-emitting device 30 observed by the observer showing color deviation, thereby improving the display effect of the display panel 300.

[0234] On the other hand, when using a photolithography process to form the light-emitting portion 302 and the common electrode 303, a corner of the rectangular sub-pixel area AA is set as a clearance area A2, and the connection portion 32 of the pixel electrode 301 is located in the clearance area A2. This also facilitates the subsequent preparation of structures such as the light-emitting portion 302 and the common electrode 303. It avoids the problem of residual film layers on the light-emitting thin film and the common electrode layer due to the surface step difference of the portion of the pixel electrode 301 exposed by the pixel opening 401 during the formation of the light-emitting portion 302 and the common electrode 303, which could lead to poor GDS in the display panel 300. This improves the yield of the display panel 300. In addition, using a photolithography process to prepare the light-emitting portion 302 and the common electrode 303 reduces the difficulty and cost of manufacturing the display panel 300. It also allows the arrangement density of the light-emitting devices in the display panel 300 to be unrestricted by the size of the FMM, thereby improving the pixel density of the display panel 300. It also eliminates the need for an FMM and etching process, avoiding problems such as inaccurate alignment.

[0235] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display panel comprising a plurality of rectangular sub-pixel regions, each of the sub-pixel regions comprising an adjacent luminous area and a avoidance area, the avoidance area comprising a vertex corner of the rectangle, and the area of ​​the rectangle excluding the avoidance area being the luminous area; The display panel includes: A substrate, a driving circuit layer provided on the substrate, and a plurality of pixel electrodes provided on a side of the driving circuit layer away from the substrate; a pixel definition structure provided on a side of the plurality of pixel electrodes away from the driving circuit layer, wherein the pixel definition structure is provided with a pixel opening in the light-emitting area, and the shape of the pixel opening is the same as that of the light-emitting area; a plurality of light-emitting portions, wherein one light-emitting portion is disposed in one of the pixel openings; Among them, one pixel opening corresponds to a pixel electrode, and the pixel electrode includes a main body and a connecting part connected to each other. The shape of the main body is the same as that of the pixel opening. The connecting part is located in the avoidance area and is connected to the driving circuit layer.

2. The display panel according to claim 1, wherein The boundary of the main body portion includes two connected right-angled sides and a set side, one end of the two right-angled sides is connected and forms a right angle, and two ends of the two right-angled sides that are away from each other are respectively connected to two ends of the set side, and the set side includes an arc segment; One end of the connecting portion is connected to the arc segment at the boundary of the main body portion, and the other end of the connecting portion extends in a direction away from the main body portion and is connected to the driving circuit layer.

3. The display panel according to claim 2, wherein: Two ends of the arc segment are respectively connected to two ends of the two right-angled sides that are far away from each other.

4. The display panel according to claim 2, wherein: The set edge further includes two straight line segments, which are respectively located at two ends of the arc segment, and the straight line segments are connected to one end of the arc segment and one end of one of the right-angled edges.

5. The display panel according to claim 3, wherein: The radius of curvature of the arc segment is less than or equal to the size of the right-angled side. The display panel according to claim 1 , wherein: The orthographic projection of the main body on the substrate is in the shape of a sector, or is approximately in the shape of a sector, or is in the shape of a pentagon obtained by cutting off a corner of a rectangle.

7. The display panel according to claim 2, wherein: The display panel includes a plurality of pixel units, each of the pixel units includes four sub-pixels, the four sub-pixels are arranged in a 2×2 matrix, and each of the sub-pixels includes a pixel electrode and its corresponding light-emitting portion; The set edges of the main bodies of the pixel electrodes of the four sub-pixels are close to each other and enclose a receiving area; The connection parts of the pixel electrodes of the four sub-pixels are arranged close to each other and located in the accommodating area.

8. The display panel according to claim 7, wherein: The shape formed by the connection line between ends of the connection portions of the four sub-pixels away from the respective main portions is a square.

9. The display panel according to claim 2, wherein: The display panel includes a plurality of pixel units, each of the pixel units includes four sub-pixels, the four sub-pixels are arranged in a 2×2 matrix, and each of the sub-pixels includes a pixel electrode and its corresponding light-emitting portion; Along a circumferential direction around the center of the pixel unit, the main portions and the connecting portions of the four pixel electrodes of the four sub-pixels are alternately arranged.

10. The display panel according to claim 9, wherein: The connection portion extends along a tangential direction of a circumference surrounding the center of the pixel unit.

11. The display panel according to any one of claims 7 to 10, wherein: Among the pixel electrodes of the four sub-pixels, there is at least a pair of two adjacent pixel electrodes that are symmetrically arranged relative to a reference line; wherein the reference line is: a bisector perpendicular to the arrangement direction of the two adjacent pixel electrodes and located between the two adjacent pixel electrodes.

12. The display panel according to claim 11, wherein: Each of the pixel units includes at least a first sub-pixel and a second sub-pixel having the same luminous color, and the first sub-pixel and the second sub-pixel are distributed at two adjacent vertex corners in the pixel unit.

13. The display panel according to claim 11, wherein: Each of the pixel units includes at least a first sub-pixel and a second sub-pixel having the same luminous color, and the first sub-pixel and the second sub-pixel are distributed at two opposite vertex corners in the pixel unit.

14. The display panel according to claim 1, wherein: It also includes: an insulating dielectric layer located between the driving circuit layer and the pixel electrode, the insulating dielectric layer is provided with a via hole, the connecting portion is connected to the driving circuit layer through the via hole, and the opening is located in the avoidance area.

15. A display device comprising: The display panel according to any one of claims 1 to 14; A cover plate is provided on the light-emitting side of the display panel.

Images