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 technical field of display, and in particular, to a display panel and a display device. BACKGROUND

[0003] Organic Light Emitting Diode (OLED) is a new generation of display technology that has developed rapidly in recent years, and 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, flexibility and other advantages, and is widely used in flat panel display, flexible display, vehicle display and solid state lighting and other fields.

[0004] SUMMARY

[0005] In one aspect, a display panel is provided. The display panel includes a plurality of rectangular sub-pixel regions, each of the sub-pixel regions includes an adjacent light-emitting area and a reserved area, the reserved area includes one corner of the rectangle, and the area of the rectangle other than the reserved 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 parts. The driving circuit layer is arranged on the substrate; the plurality of pixel electrodes are arranged on the side of the driving circuit layer away from the substrate; the pixel definition structure is arranged on the 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, and the shape of the pixel opening is the same as that of the light-emitting area; and one light-emitting part is arranged in one pixel opening. One pixel opening corresponds to one pixel electrode, the pixel electrode includes a main body part and a connecting part 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 reserved area, and the connecting part is connected to the driving circuit layer.

[0006] In some embodiments, the boundary of the main body part includes two straight angle sides and a set side connected to each other, one end of the two straight angle sides is connected and forms a right angle, the two ends of the two straight angle sides away from each other are connected to the two ends of the set side, and the set side includes an arc segment; one end of the connecting part is connected to the arc segment of the boundary of the main body part, and the other end of the connecting part extends away from the main body part and is connected to the driving circuit layer.

[0007] In some embodiments, two ends of the arcuate segment are connected to two ends of the two straight angle sides, respectively, and the two ends are away from each other.

[0008] In some embodiments, the setting edge further comprises two straight line segments, which are located at two ends of the arcuate segment, and the straight line segments are connected to one end of the arcuate segment and one end of one of the straight angle sides.

[0009] In some embodiments, a radius of curvature of the arcuate segment is less than or equal to a size of the straight angle side.

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

[0011] In some embodiments, the display panel comprises a plurality of pixel units, each of the pixel units comprises four sub-pixels, the four sub-pixels are arranged in a 2x2 matrix, each of the sub-pixels comprises a pixel electrode and a corresponding light emitting part of the sub-pixel; setting edges of main body parts of the pixel electrodes of the four sub-pixels are close to each other and enclose a containing area; connecting parts of the pixel electrodes of the four sub-pixels are arranged close to each other and are located in the containing area.

[0012] In some embodiments, a connecting line between the connecting parts of the four sub-pixels away from one end of the main body part of each of the four sub-pixels forms a shape of a square.

[0013] In some embodiments, the display panel comprises a plurality of pixel units, each of the pixel units comprises four sub-pixels, the four sub-pixels are arranged in a 2x2 matrix, each of the sub-pixels comprises a pixel electrode and a corresponding light emitting part of the sub-pixel; along a circumferential direction around a center of the pixel unit, main body parts and connecting parts of the four pixel electrodes of the four sub-pixels are arranged alternately.

[0014] In some embodiments, the connecting parts extend along a tangential direction of the circumferential direction around the center of the pixel unit.

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

[0016] In some embodiments, each of the pixel units comprises at least a first sub-pixel and a second sub-pixel with the same light emitting color, and the first sub-pixel and the second sub-pixel are distributed at two adjacent top corners of the pixel unit.

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

[0018] In some embodiments, the display panel further comprises an insulating medium layer between the driving circuit layer and the pixel electrode, and a via hole is provided on the insulating medium layer, the connecting part is connected with the driving circuit layer through the via hole, and the opening is located in the avoiding area.

[0019] In another aspect, a display device is provided. The display device comprises the display panel according to any one of the above embodiments, and a cover plate arranged on the light exit side of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, etc. of the products involved in the embodiments of the present disclosure.

[0021] FIG. 1 is a structural diagram of a display device according to some embodiments;

[0022] FIG. 2 is a structural diagram of a display panel according to some embodiments;

[0023] FIG. 3 is a structural diagram of another display panel according to some embodiments;

[0024] FIG. 4 is a partial structural diagram of a display panel according to some embodiments;

[0025] FIG. 5 is a structural diagram of yet another display panel according to some embodiments;

[0026] FIG. 6A is a structural diagram of yet another display panel according to some embodiments;

[0027] FIG. 6B is a structural diagram of yet another display panel according to some embodiments;

[0028] FIG. 7 is a structural diagram of yet another display panel according to some embodiments;

[0029] FIG. 8 is a structural diagram of yet another display panel according to some embodiments;

[0030] FIG. 9 is a structural diagram of yet another display panel according to some embodiments;

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

[0032] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0033] Unless otherwise required by context, the term "comprises" in the specification and claims is to be construed as an open, inclusive meaning, i.e., "comprises, but is not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", or "some examples" are intended to mean that the particular feature, structure, material, or characteristic following the term is included in at least one embodiment or example of the present disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics described can be included in any suitable way in any one or more embodiments or examples.

[0034] Hereinafter, the terms "first" and "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0035] In describing some embodiments, "coupled" and "connected", and their derivatives, can be used. The term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" can also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

[0036] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C", and includes the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a 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 means open and inclusive language that does not exclude additional devices or steps not explicitly described.

[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 can also be present.

[0040] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are idealized illustrations. In the interest of clarity, not all of the scale of the layers and regions can be shown in the drawings, which can distort the representation of the actual sizes of the layers and regions. Thus, the exemplary embodiments should not be construed as limited to the precise shapes and dimensions illustrated in the drawings. In particular, the exemplary embodiments are not limited to the precise shapes and dimensions illustrated in the drawings, and the shapes and dimensions of the regions illustrated in the drawings are not intended to be limiting. For example, etched regions shown as rectangular will typically have curved features. Thus, the regions illustrated in the drawings are schematic and not intended to be limiting in scope. The exemplary embodiments are not limited to the precise shapes and dimensions illustrated in the drawings.

[0041] Some embodiments of the disclosure provide a display device that can be any display device that displays images whether in motion (e.g., video) or fixed (e.g., a still image) and whether textual or pictorial. More specifically, it is contemplated that the display devices of the described embodiments can be implemented in or in association with a variety of electronic devices such as, but not limited to, mobile telephones, wireless devices, personal data assistants (PDAs), hand-held or pocket computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, auto displays (e.g., odometer display, etc.), cockpit controls and / or displays, camera view displays (e.g., display of a rear view camera in a vehicle), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., display of images on a piece of jewelry) and the like.

[0042] FIG. 1 is a structural diagram of a display device according to some embodiments. As shown in FIG. 1, the display device 1000 includes a frame 100, a cover plate 200, a display panel 300, a circuit board 400, and other electronic components including a camera.

[0043] The longitudinal section of the frame 100 is in a U shape, the display panel 300, the circuit board 400, and other electronic components including a camera are arranged in the frame 100, the circuit board 400 is located between the display panel 300 and the frame 100, and the cover plate 200 is located on the light-emitting side of the display panel 300. The side of the display panel 300 for displaying an image is the light-emitting side of the display panel 300, and the side away from the light-emitting side of the display panel 300 is the non-light-emitting side of the display panel 300.

[0044] For example, the 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, and the present disclosure does not make specific limitations thereto.

[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 FIGS. 2 and 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 parts 302.

[0047] The type of the substrate 10 includes various types, which can be selected and arranged according to actual needs.

[0048] For example, the substrate 10 can be a rigid substrate. The rigid substrate can be a glass substrate or a polymethyl methacrylate (PMMA) substrate, etc.

[0049] For another example, the substrate 10 can be a flexible substrate. The flexible substrate can be a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate two formic acid glycol ester (PEN) substrate, or a polyimide (PI) substrate, etc. At this time, the display panel 300 can realize flexible display, for example.

[0050] Optionally, the substrate 10 can be formed as a single layer, a double layer or a multi-layer. Embodiments of the present disclosure do not limit this.

[0051] As shown in FIGS. 2 and 3, a driving circuit layer 20 is disposed on the substrate 10. It can be understood that the driving circuit layer 20 refers to a film layer in which a plurality of pixel circuit arrays are located, including a plurality of patterned conductive layers and insulating layers. For example, the driving circuit layer 20 includes a plurality of pixel circuits 210 and a plurality of signal lines and the like.

[0052] The pixel circuit 210 is generally composed of electronic devices such as thin film transistors (TFTs) and capacitors. For example, the pixel circuit 210 can be of a structure such as “2T1C”, “6T1C”, “7T1C”, “6T2C” or “7T2C”. Here, “T” represents a transistor, for example, 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 some embodiments of the present disclosure, only one thin film transistor 211 is shown in the drawings. For example, the thin film transistor 211 can be a driving transistor.

[0053] Specifically, as shown in FIG. 2, the driving circuit layer 20 can 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 the active layers of a plurality of thin film transistors 211; the gate metal layer 203 includes the gates of the plurality of thin film transistors 211; and the source-drain metal layer 205 includes the sources and drains of the plurality of thin film transistors 211.

[0054] It can be 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, and embodiments of the present disclosure do not limit this. The thin film transistor 211 shown in FIG. 2 is a top-gate thin film transistor.

[0055] As shown in FIGS. 2 and 3, a pixel electrode 301 is disposed on the 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 can include metals and alloys, such as aluminum (Al), magnesium (Mg), silver (Ag), and the like, and can also include metal oxides, such as indium tin oxide (ITO), indium zinc oxide (IZO), and the like.

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

[0058] Among them, the pixel definition structure 40 includes various types, which can be selected and set according to actual needs.

[0059] In some examples, as shown in Figure 2, the pixel definition structure 40 includes a pixel defining layer 41. The pixel defining layer 41 defines a plurality of pixel openings 401. The top view of the pixel defining layer 41 resembles a grid, and the plurality of pixel openings 401 constitute the mesh of this grid.

[0060] For example, the material used in the pixel defining layer 41 may include at least one of inorganic insulating materials and organic insulating materials, 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 the 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 lies within the orthographic projection of the pixel defining layer 41 on the substrate 10.

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

[0063] For example, the isolation structure 42 can be a stacked structure of metallic materials, wherein the metallic material can be a pure metal or a metal compound. Metallic materials include titanium (Ti), aluminum (Al), molybdenum (Mo), or other ferrous metals. For instance, the isolation structure 42 can be a Ti / Al / Ti stacked structure, wherein the wet etching rates of Ti and Al are different, which can form an undercut structure (e.g., an "I" shaped structure). The isolation structure 42 can also be a Mo / Al / Mo stacked structure. The embodiments of this disclosure are not limited in this respect.

[0064] The isolation structure 42 can also be a laminated structure of metallic materials and ferrous organic materials, whereby the organic materials include ferrous resin adhesive. The metallic materials can include ferrous metallic materials, such as MoO2. X .

[0065] It should be noted that the isolation structure 42 can be not only the three-layer structure ("I" shaped structure) shown in Figure 3, but also a two-layer structure, a four-layer structure, or even a more layered structure. There are no specific limitations here, as long as the isolation structure 42 has an undercut structure.

[0066] It should be noted that when the pixel definition structure 40 includes a pixel delimiting 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 delimiting layer 41.

[0067] As shown in Figures 2 and 3, a light-emitting part 302 is disposed within a pixel opening 401.

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

[0069] In other examples, the light-emitting unit 302 includes, in addition to the light-emitting layer, one or more of the following: 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 FIG. 2 and FIG. 3, the display panel 300 further comprises a plurality of common electrodes 303 disposed on the side of the light emitting part 302 away from the pixel electrode 301. The material of the common electrode 303 can include a (semi-) transparent layer including 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 of the common electrode 303 includes a multi-layer structure formed by a Ti / Al / Ti stacked metal.

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

[0072] In other examples, the plurality of common electrodes 303 are isolated from each other. For example, in the case where the pixel definition structure 40 includes the pixel boundary layer 41 and the isolation structure 42, the isolation structure 42 can isolate any two common electrodes 303, i.e., the two adjacent common electrodes 303 are spaced apart and not directly connected. However, the two adjacent common electrodes 303 can be electrically connected, for example, the 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 part 302 located in each pixel opening 401 can receive substantially the same electrical signal transmitted by the common electrode 303, which is beneficial to improve the accuracy of the electrical signal received by the plurality of light emitting parts 302, and further beneficial to improve the display uniformity of the display panel 300.

[0073] It can be understood that the overlapping part of the pixel electrode 301, the light emitting part 302, and the common electrode 303 forms a light emitting device 30. Optionally, the pixel electrode 301 is an anode of the light emitting device 30, and the common electrode 303 is a cathode of the light emitting device 30. By applying a voltage on the pixel electrode 301 and the common electrode 303, an electric field is generated between them, which can drive the holes in the pixel electrode 301 and the electrons in the common electrode 303 to recombine in the light emitting part 302, thereby emitting light.

[0074] The pixel electrode 301 of the light emitting device 30 is electrically connected to the pixel circuit 210. The pixel circuit 210 can generate a driving signal and transmit the driving signal to the corresponding light emitting device 30 to control the light emitting state of the light emitting device 30. The light emitting state includes, for example, whether the light emitting device 30 emits light, or the luminance of the light emitting device 30, etc. The plurality of pixel circuits 210 collectively control the light emitting state of the plurality of light emitting devices 30, and thus the display panel 300 can realize picture display.

[0075] In some examples, as shown in FIG. 2, at least one insulating medium layer 50 is arranged between the pixel electrode 301 and the driving circuit layer 20. The material of the insulating medium layer 50 can include organic insulating materials, or inorganic and organic insulating materials. Exemplarily, the organic insulating materials include at least one of general polymers such as polymethyl methacrylate (PMMA) and polystyrene (PS), polymer derivatives with phenol groups, acryl-based polymers, imide-based polymers, aryl ether-based polymers, amide-based polymers, fluorine-based polymers, p-xylene-based polymers, and vinyl alcohol-based polymers. For example, the material of the insulating medium layer 50 includes polyimide.

[0076] As shown in FIG. 2, the insulating medium layer 50 is provided with a via hole 501. The pixel electrode 301 is electrically connected to the driving circuit layer 20 through the via hole 501.

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

[0078] As can be understood by those skilled in the art, the light emitting device 30 has a higher requirement for the flatness of the surface on which it is arranged. The flatter the surface on which the light emitting device 30 is arranged, the better the light emitting quality of the light emitting device 30. If the surface on which the light emitting device 30 is arranged is uneven, the light emitting quality of the light emitting device 30 will be greatly affected.

[0079] In the embodiments as shown in FIG. 2 to FIG. 4, since the orthographic projection of the via hole 501 on the substrate 10 is located within the orthographic projection of the pixel opening 401 on the substrate 10, the surface of the pixel electrode 301 in contact with the light emitting part 302 (i.e., the surface of the part of the pixel electrode 301 exposed by the pixel opening 401) has a step, and the light emitting part 302 also has a step, which causes the light emitting surface of the light emitting device 30 not to be on the same surface, and the light emitting angles at different positions of the light emitting device 30 are different, which seriously affects the light emitting quality of the light emitting device 30, causes the color presented by the light emitting device 30 observed by the observer to have color deviation, and affects the display effect of the display panel 300.

[0080] In some other implementations, in order to solve the problem that it is difficult to align the display panel to be evaporated and the FMM when performing full-layer evaporation to form the light-emitting layer by using a high-precision FMM, and it is difficult to prepare the light-emitting part 302 and the common electrode 303, a photolithography process is used to prepare the light-emitting part 302 and the common electrode 303.

[0081] The photolithography process can include the following steps. After the full-layer light-emitting layer and the common electrode layer are formed, photoresist is coated on the common electrode layer, a mask plate is arranged on the side of the photoresist away from the substrate, the photoresist is exposed and developed through the mask plate, the exposed part of the photoresist is removed, and the part of the photoresist that is not exposed is reserved, so as to form the patterned photoresist. Then, the patterned photoresist is used as a mask to etch the light-emitting layer and the common electrode layer, and the part of the light-emitting layer and the common electrode layer that is not shielded by the patterned photoresist is removed, so as to obtain the plurality of light-emitting parts 302 and the common electrode 303. Finally, the display panel 300 to be formed can be placed in a stripping solution to dissolve and strip off the patterned photoresist layer.

[0082] In the case where the orthographic projection of the via hole 501 on the substrate 10 is located within the orthographic projection of the pixel opening 401 on the substrate 10, in the case where part of the light-emitting layer and part of the common electrode layer are located in the via hole 501, in the process of preparing the light-emitting part 302 and the common electrode 303 by using the photolithography process, the part of the light-emitting layer and the common electrode layer located in the via hole 501 is prone to insufficient etching, which causes film layer residues of the light-emitting layer and the common electrode layer in the via hole 501, resulting in Growing Dark Spot (GDS) defects of the display panel 300, and affecting the display effect of the display panel 300.

[0083] Based on this, in the embodiments of the present disclosure, the display panel 300 is further improved. As shown in FIG. 5, FIG. 5 is a structural diagram of the display panel 300 provided by some embodiments of the present disclosure.

[0084] As shown in FIG. 5, the display panel 300 includes a plurality of rectangular sub-pixel regions AA, each of which includes an adjacent light-emitting area A1 and an avoidance area A2, the avoidance area A2 includes one corner of the rectangle, and the area of the rectangle except the avoidance area A2 is the light-emitting area A1.

[0085] One sub-pixel is arranged in one sub-pixel region AA. The plurality of sub-pixels are arranged in multiple rows and multiple columns, and each row of sub-pixels is arranged along the X direction, and each column of sub-pixels is arranged along the Y direction. The sub-pixel is the smallest unit for the display panel 300 to display a picture, and each sub-pixel can display one single color, for example, red, blue, or green. By adjusting the brightness (gray scale) of sub-pixels of different colors, color combination and superposition can realize the display of multiple colors, thereby realizing the full-color picture display of the display panel 300.

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

[0087] The shape of the light emitting region A1 and the shape of the avoiding region A2 can include multiple types, and can be selected according to actual needs.

[0088] In some examples, as shown in FIG. 6A, the shape of the light emitting region A1 can be a pentagon formed by removing one corner of a rectangle, a trapezoid, or other regular polygon.

[0089] In the case where the shape of the light emitting region A1 is a regular polygon, the shape of the avoiding region A2 is also a regular polygon. For example, as shown in FIG. 6A, in the case where the shape of the light emitting region A1 is a pentagon, the shape of the avoiding region A2 can be a triangle.

[0090] In other examples, the light emitting region A1 can be a special-shaped light emitting region. The shape of the special-shaped light emitting region can include multiple types, and embodiments of the present disclosure do not limit the same.

[0091] It should be noted that the “special-shaped light emitting region” is only used to distinguish from other shapes of light emitting regions (for example, a trapezoidal light emitting region, etc.). The shape of the special-shaped light emitting region can be an irregular closed shape composed of an arc-shaped line segment and a straight line segment, or an irregular shape composed of multiple straight line segments. For example, as shown in FIG. 5, the special-shaped light emitting region A1 is an irregular closed shape composed of two straight angle sides and one arc side.

[0092] In addition, in the case where the light emitting region A1 is a special-shaped light emitting region, the avoiding region A2 is a special-shaped avoiding region, and the special-shaped avoiding region and the special-shaped light emitting region cooperate with each other to jointly constitute a rectangular sub-pixel region AA.

[0093] The pixel opening 401 of the pixel definition structure 40 is arranged in the light emitting region A1, and the shape of the pixel opening 401 is the same as the shape of the light emitting region A1. For example, the shape of the light emitting region A1 and the shape of the pixel opening 401 are both regular polygons (for example, pentagons). For another example, the shape of the light emitting region A1 and the shape of the pixel opening 401 are both special-shaped (for example, fan-shaped).

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

[0095] For example, when the pixel opening 401 has a regular polygon shape (for example, a pentagon), the main body part 31 also has a regular polygon shape (for example, a pentagon); when the pixel opening 401 has a special shape (for example, a sector), the main body part 31 also has a special shape (for example, a sector). The embodiments of the present disclosure do not limit this.

[0096] For example, the main body part 31 has a uniform thickness without a step, and the connecting part 32 has a step.

[0097] The uniform thickness of the main body part 31 means that the side of the main body part 31 close to the substrate 10 and the side of the main body part 31 away from the substrate 10 are on the same horizontal plane. The step of the connecting part 32 means that the side of the main body part 31 close to the substrate 10 is not on the same horizontal plane, and the side of the main body part 31 away from the substrate 10 is not on the same horizontal plane.

[0098] For example, one end of the connecting part 32 is electrically connected to the main body part 31, and the other end of the connecting part 32 is electrically connected to the pixel circuit 210 in the driving circuit layer 20, so as to realize the 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 display panel 300, by setting one corner of the rectangular sub-pixel area AA as the avoiding area A2, and setting the connecting part 32 of the pixel electrode 301 for connecting the driving circuit layer 20 in the avoiding area A2, the phenomenon that the light emitting surface of the light emitting device 30 is not on the same surface due to the connecting part 32 being set in the light emitting area A1, the area of the pixel electrode 301 overlapping with the light emitting part 302 and the unevenness of the light emitting part 302, the difference in light emitting angle at different positions, and the color deviation of the color presented by the light emitting device 30 observed by the observer can be improved, thereby improving the display effect of the display panel 300.

[0100] In addition, the connecting portion 32 of the pixel electrode 301 is arranged in the avoiding 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 beneficial for the preparation of the subsequent light emitting portion 302 and the common electrode 303 and the like, avoids the case that, when the light emitting portion 302 and the common electrode 303 and the like are formed by using a photolithography process, the surface of the portion of the pixel electrode 301 exposed by the pixel opening 401 has a step, the light emitting layer and the common electrode layer are not etched sufficiently, there is a residual film layer, and the display panel 300 has GDS defects, thereby improving the yield of the display panel 300.

[0101] In some embodiments, as shown in FIG. 5, the boundary of the main body portion 31 includes two straight angle sides L and one set side M, one end of the two straight angle sides L is connected and forms a right angle, the two ends of the two straight angle sides L away from each other are connected with the two ends of the set side M respectively, and the set side M includes an arc segment M1. One end of the connecting portion 32 is connected with 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 with the driving circuit layer 20.

[0102] For example, as shown in FIG. 5, the two straight angle sides L are a first straight angle side L1 and a second straight angle side L2 respectively. The first straight angle side L1 is parallel to the row direction X of the plurality of sub-pixel arrangements included in the pixel arrangement structure, and the second straight angle side L2 is parallel to the column direction Y of the plurality of sub-pixel arrangements included in the pixel arrangement structure. One end of the first straight angle side L1 is connected with one end of the set side M, and the second straight angle side L2 is connected with the other end of the set side M. The end of the first straight angle side L1 away from the set side M is connected with the end of the second straight angle side L2 away from the set side M, so that the first straight angle side L1, the second straight angle side L2 and the set side M can form a closed pattern. The first straight angle side L1 and the second straight angle side L2 intersect at right angles.

[0103] In addition, the arc segment M1 included in the set side M can be curved towards the above-mentioned right angle or away from the above-mentioned right angle. Embodiments of the present disclosure do not limit this. For example, the arc segment M1 is away from the above-mentioned right angle, as shown in FIG. 5. In this way, by arranging one corner of the rectangular sub-pixel area AA as the avoiding area A2, and arranging the connecting portion 32 of the pixel electrode 301 for connecting the driving circuit layer 20 in the avoiding area A2, the main body portion 31 of the pixel electrode 301 in the pixel opening 401 is flat and has no step, and the light emitting portion 302 is also flat and has no step, so as to ensure the light emitting quality of the light emitting device 30, and also ensure that the area of the light emitting area A1 of the light emitting device 30 is relatively large, thereby ensuring the aperture ratio of the display panel 300.

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

[0105] Further, the length of the first right-angle side L1 and the second right-angle side L2 can be the same or different. Embodiments of the present disclosure do not limit this. For example, as shown in FIG. 5, the length of the first right-angle side L1 and the second right-angle side L2 is the same, thereby improving the regularity of the plurality of pixel electrodes 301.

[0106] As described above, the shape of the light-emitting region A1 is the same as that of the main body part 31. In the case where the boundary of the main body part 31 includes two right-angle sides L and one set side M connected to each other, the boundary of the light-emitting region A1 includes two right-angle sides of the rectangular sub-pixel region AA and one side substantially coinciding with the set side M of the main body part 31, and the closed region formed by the other two right-angle sides of the rectangular sub-pixel region AA constitutes the avoidance region A2.

[0107] In the present embodiment, by the above setting, the shape of the main body part 31 is limited, that is, the shape of the light-emitting region A1 is limited, the boundary of the light-emitting region A1 includes two right-angle sides of the rectangular sub-pixel region AA and one side substantially coinciding with the set side M of the main body part 31, and the avoidance region A2 includes one corner of the rectangular sub-pixel region AA. By arranging the connecting part 32 of the pixel electrode 301 in the avoidance region A2, the phenomenon that the light-emitting surface of the light-emitting device 30 is not on the same surface due to the arrangement of the connecting part 32 in the light-emitting region A1, the difference in light-emitting angle at different positions, and the color deviation of the color presented by the light-emitting device 30 observed by the observer are improved, thereby improving the display effect of the display panel 300.

[0108] It should be noted that there are many ways to set the set side M, which can be selected according to actual needs.

[0109] In one implementation mode, as shown in FIG. 5, the set side M only includes an arc segment M1. The two ends of the arc segment M1 are connected to the two ends of the two right-angle sides L, respectively, which are away from each other.

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

[0111] The shape of the light-emitting region A1 is the same as that of the main body 31. In the case where the boundary of the main body 31 includes two connected straight edges L and an arc segment M1, the boundary of the light-emitting region A1 includes two straight edges of the rectangular sub-pixel region AA and one side edge substantially coinciding with the arc segment M1, and the closed region formed by the other two straight edges of the rectangular sub-pixel region AA constitutes the avoiding region A2.

[0112] With the above arrangement, the shape of the main body 31 is limited, that is, the shape of the light-emitting region A1 is limited, the boundary of the light-emitting region A1 includes two straight edges of the rectangular sub-pixel region AA and one side edge substantially coinciding with the arc segment M1, and the avoiding region A2 includes one corner of the rectangular sub-pixel region AA. By arranging the connecting portion 32 of the pixel electrode 301 in the avoiding region A2, the phenomenon that the color presented by the light-emitting device 30 observed by the observer appears to be color cast due to the arrangement of the connecting portion 32 in the light-emitting region A1, which causes the light-emitting surface of the light-emitting device 30 not to be on the same surface and the light-emitting angle at different positions to be different, is improved, thereby improving the display effect of the display panel 300.

[0113] In addition, the boundary of the light-emitting region A1 includes two straight edges of the rectangular sub-pixel region AA and one side edge substantially coinciding with the arc segment M1, the arc segment M1 is relatively smooth, which weakens the sense of protrusion at the boundary of the light-emitting region A1 and reduces the visual jaggy sense at the arc segment, thereby further improving the display effect of the display panel 300.

[0114] In another implementation manner, as shown in FIG. 6B, the set edge M further includes two straight line segments M2, and the two straight line segments M2 are respectively located at two 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 one straight edge L.

[0115] For example, as shown in FIG. 6B, the two straight line segments M2 are respectively 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 line segment M21 is connected to one end of the arc line segment M1, and the second straight line segment M22 is connected to the other end of the arc line segment M1. The first straight line segment M21 is connected to the end of the second straight side L2 away from the end of the first straight side L1, and the second straight line segment M22 is connected to the end of the first straight side L1 away from the end of the second straight side L2, so that the first straight side L1, the second straight side L2, the first straight line segment M21, the second straight line segment M22 and the arc line segment M1 form a closed pattern. The first straight line segment M21 is perpendicular to the second straight side L2, and the second straight line segment M22 is perpendicular to the first straight side L1.

[0117] Further, the lengths of the first straight line segment M21 and the second straight line segment M22 can be the same or different. Embodiments of the present disclosure do not limit this. For example, as shown in FIG. 6B, the lengths of the first straight line segment M21 and the second straight line segment M22 are the same, thereby improving the regularity of the pixel electrode 301 and facilitating the preparation of the pixel electrode 302.

[0118] It can be understood that, when the lengths of the first straight side L1 and the second straight side L2 of the main body part 31 are constant, the length of the straight line segment M2 in the setting edge M is changed, and the area of the main body part 31 also changes. For example, when the lengths of the first straight side L1 and the second straight side L2 of the main body part 31 are constant, the greater the length of the straight line segment M2, the greater the area of the main body part 31, and the smaller the length of the straight line segment M2, the smaller the area of the main body part 31.

[0119] As described above, the shape of the light-emitting area A1 is the same as that of the main body part 31, and the area is basically the same. When the setting edge M further includes two straight line segments M2, the area of the main body part 31 is larger, that is, the area of the light-emitting area A1 is larger, and by setting the length of the straight line segment M2, the area of the light-emitting area A1 can be increased as much as possible, and the aperture ratio of the display panel 300 is increased.

[0120] In addition, when the boundary of the main body part 31 includes the setting edge M further including two straight line segments M2, the boundary of the light-emitting area A1 includes two straight sides of the rectangular sub-pixel region AA and one side substantially coinciding with the setting edge M, which also includes two straight line segments and one arc line segment.

[0121] With the above arrangement, the shape of the main body 31 is defined, i.e., the shape of the light emitting area A1 is defined, one corner of the rectangular sub-pixel area AA is set as the avoiding area A2, and the connecting part 32 of the pixel electrode 301 is arranged in the avoiding area A2. This improves the phenomenon that the light emitting surface of the light emitting device 30 is not on the same surface due to the arrangement of the connecting part 32 in the light emitting area A1, and the light emitting angle at different positions is different, and the color of the light emitting device 30 observed by the observer is color cast, 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 setting side M, the area of the main body 31 can be adjusted. The shape of the light emitting area A1 is the same as that of the main body 31, and the area of the light emitting area A1 is substantially the same as that of the main body 31, i.e., the area of the light emitting area A1 can be set as needed.

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

[0124] For example, as shown in FIG. 5, the curvature radius of the arc segment M1 is equal to the size of the right angle side L. At this time, the center of the arc segment M1 coincides with the intersection of the two right angle sides L.

[0125] For example, as shown in FIG. 6B, the curvature radius of the arc segment M1 is less than the size of the right angle side L. For example, the curvature radius of the arc segment M1 is equal to half of the size of the right angle side L. At this time, the center of the arc segment M1 is located in the right angle formed by the intersection of the two right angle sides L.

[0126] In combination with FIGS. 5 and 6B, in the case where the sizes of the two right angle sides of the light emitting area A1 are constant, the curvature radius of the arc segment M1 is different, and the area of the orthographic projection of the main body 31 on the substrate 10 is also different. That is, by setting the size of the curvature radius of the arc segment M1, the size of the area of the main body 31 can be set.

[0127] As described above, the shape of the light emitting area A1 is the same as that of the main body 31, and the area is substantially the same. In this embodiment, by setting the size of the curvature radius of the arc segment M1, the size of the area of the main body 31 can be set, i.e., the size of the area of the light emitting area A1 can be set, so that the size of the area of the light emitting area A1 can be edited, i.e., the size of the area of the light emitting area A1 can be set as needed. For example, the area of the light emitting area A1 is set to be large, which can improve the aperture ratio of the display panel 300, and further improve the service life of the display panel 300.

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

[0129] In some embodiments, the shape of the orthographic projection of the main body 31 on the substrate 10 is a sector, or approximately a sector, or a polygon obtained by cutting a corner off a rectangle.

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

[0131] In the present embodiment, the shape of the main body 31 is limited, i.e., the shape of the light emitting region A1 is limited to be a sector, approximately a sector, or a polygon obtained by cutting a corner off a rectangle, the avoidance region A2 includes one corner of the sub-pixel region AA of the rectangle, and the connecting portion 32 of the pixel electrode 301 is arranged in the avoidance region A2. This improves the phenomenon that the light emitting surface of the light emitting device 30 is not on the same surface due to the arrangement of the connecting portion 32 in the light emitting region A1, the light emitting angle at different positions is different, and the color presented by the light emitting device 30 observed by the observer is color cast, thereby improving the display effect of the display panel 300.

[0132] In some embodiments, as shown in FIG. 7, the display panel 300 includes a plurality of pixel units Q, each pixel unit Q includes four sub-pixels P arranged in a 2x2 matrix, 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 body 31 of the pixel electrodes 301 of the four sub-pixels P are close to each other and enclose a containing region 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 containing region R.

[0133] Exemplarily, one sub-pixel region AA is provided with one sub-pixel P, each pixel unit Q includes four sub-pixels P, that is, the region where each pixel unit Q is located is composed of four sub-pixel regions AA, the shape of the sub-pixel region AA is a rectangle, and the four sub-pixel regions AA included in each pixel unit region are arranged in a 2x2 matrix, forming a square. In this way, the arrangement of multiple pixel units Q can be more compact, improving the space utilization of the display panel 300, thereby facilitating the provision of the pixel density of the display panel 300.

[0134] Exemplarily, as shown in FIG. 6B, the plurality of pixel units Q are arranged in multiple rows and multiple columns, each row of pixel units Q is arranged along the X direction, and each column of pixel units Q is 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 part 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 at least include 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 device 30 in the red sub-pixel, the green sub-pixel, and the blue sub-pixel are all configured to emit white light; at this time, the display panel 300 can further 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. Embodiments of the present disclosure do not limit this.

[0137] It can be understood that any two light emitting devices 30 are separated by the pixel definition structure 40. Each sub-pixel region 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. In the case where the set edges M of the main parts 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 containing area R, the pixel definition structure 40 between the light emitting devices 30 in the four sub-pixels P is integrally arranged, and is located in the above containing area R.

[0138] With the above arrangement, the connecting portion 32 of the pixel electrode 301 is arranged in the avoiding area A2, which improves the phenomenon that the color of the light emitting device 30 observed by the observer appears to be color cast due to the connecting portion 32 arranged in the light emitting area A1, which makes the area of the pixel electrode 301 overlapping with the light emitting portion 302 and the light emitting portion 302 uneven, resulting in that the light emitting surface of the light emitting device 30 is not on the same surface, and the light emitting angle at different positions is different. Moreover, the pixel defining structure 40 between the light emitting devices 30 of the four sub-pixels P included in each pixel unit Q is arranged in an integrated manner, and when the pixel defining structure 40 is formed, the pixel defining structure 40 between the light emitting devices 30 of the four sub-pixels P corresponds to one opening of the mask plate, thereby reducing the precision requirement of the mask plate.

[0139] In some embodiments, as shown in FIG. 7, the connecting lines between the ends of the connecting portions 32 of the four sub-pixels P away from the respective main body portions 31 form a square shape.

[0140] For example, as shown in FIG. 7, in one pixel unit Q, the connecting lines between the ends of the connecting portions 32 of the two sub-pixels P arranged in the X direction and located in the same row away from the respective main body portions 31 are parallel to the X direction; and the connecting lines between the ends of the connecting portions 32 of the two sub-pixels P arranged in the Y direction and located in the same column away from the respective main body portions 31 are parallel to the Y direction.

[0141] For example, as shown in FIG. 7, in one pixel unit Q, the connecting portions 32 of the two sub-pixels P located in the same row are symmetrically arranged about the bisector located between the two sub-pixels P and perpendicular to the row direction X in which the plurality of sub-pixels are arranged.

[0142] For example, as shown in FIG. 7, in one pixel unit Q, the connecting portions 32 of the two sub-pixels P located in the same column are symmetrically arranged about the bisector located between the two sub-pixels P and perpendicular to the column direction Y in which the plurality of sub-pixels are arranged.

[0143] Therefore, the connecting portions 32 of the four sub-pixels P are uniformly distributed in one pixel unit Q, which can make the loads of the respective pixel electrodes 301 substantially the same, which is beneficial to reduce the difference of the signals received by the respective pixel electrodes 301 and improve the display uniformity of the display panel 300.

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

[0145] For example, as shown in FIG. 8, the main body 31 of the four pixel electrodes 301 of the four sub-pixels P is distributed in a windmill shape. For example, in the main body 31 of the two adjacent pixel electrodes 301, the main body 31 of one of the pixel electrodes 301 is rotated by 90° in the same direction (for example, clockwise) around the center point of the pixel unit Q, and coincides with the main body 31 of the other pixel electrode 301.

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

[0147] For example, as shown in FIG. 8, the set edge M of the main body 31 overlaps with the circle around the center of the pixel unit Q, and the end of the connecting portion 32 close to the main body 31 is connected to the part of the set edge M at the overlapping position. The connecting portion 32 extends along the tangent direction of the overlapping position of the circle around the center of the pixel unit Q. In this way, the uniformity of the arrangement of the sub-pixels P is improved.

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

[0149] In some examples, as shown in FIG. 7, among the pixel electrodes 301 of the four sub-pixels P included in one pixel unit Q, there are two pairs of two adjacent pixel electrodes 301 symmetrically arranged with respect to the reference line aa. For example, in the pixel unit Q, the pixel electrode 301 of the sub-pixel P at the upper left corner and the pixel electrode 301 of the sub-pixel P at the upper right corner are symmetrically arranged with respect to the reference line aa; the pixel electrode 301 of the sub-pixel P at the lower left corner and the pixel electrode 301 of the sub-pixel P at the lower right corner are symmetrically arranged with respect to the reference line aa.

[0150] In some examples, as shown in FIG. 6B, the four sub-pixels P in the figure can constitute a pixel unit Q, and in the pixel unit Q, there is a pair of two adjacent pixel electrodes 302 symmetrically arranged with respect to the bisector between the two adjacent pixel electrodes 301, which is perpendicular to the arrangement direction of the two adjacent pixel electrodes 301. For example, in the pixel unit Q, the pixel electrode 302 of the sub-pixel P at the lower left corner and the pixel electrode 302 of the sub-pixel P at the upper right corner are symmetrically arranged with respect to the bisector between the two adjacent pixel electrodes 301, which is perpendicular to the arrangement direction of the two adjacent pixel electrodes 301.

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

[0152] In some embodiments, as shown in FIGS. 7 and 8, each pixel unit Q includes at least a first sub-pixel P1 and a second sub-pixel P2 having the same light-emitting color, and the first sub-pixel P1 and the second sub-pixel P2 are distributed at two adjacent top corners in the pixel unit Q.

[0153] It should be noted that the shape of the orthographic projection of one pixel unit Q on the substrate 10 is a rectangle, and the “two adjacent top corners in the pixel unit Q” refer to the two top 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 arrangement of the plurality of sub-pixels, as shown in FIG. 7. 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 arrangement of the plurality of sub-pixels. Embodiments of the present disclosure do not limit this.

[0155] For example, the first sub-pixel P1 and the second sub-pixel P2 can be blue sub-pixels. The light-emitting material of the blue sub-pixel has low efficiency, and by arranging two blue sub-pixels in each pixel unit Q, the effective light-emitting area of the blue sub-pixel in one pixel unit Q is maximized, and the color deviation problem caused by the different light-emitting efficiencies of red, green, and blue sub-pixels can be reduced.

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

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

[0158] In the above embodiment of the present disclosure, the first sub-pixel P1 and the second sub-pixel P2 are located at two adjacent top corners of the pixel unit Q, are arranged adjacently, and have the same light-emitting color. Thus, in the process of forming the light-emitting part 302 of the first sub-pixel P1 and the second sub-pixel P2, the problem of crosstalk between the first sub-pixel P1 and the second sub-pixel P2 can be temporarily ignored, and in the high-precision metal mask plate used to manufacture the light-emitting part 302 of the first sub-pixel P1 and the second sub-pixel P2, the two openings corresponding to the light-emitting part 302 of the first sub-pixel P1 and the light-emitting part 302 of the second sub-pixel P2 can be connected into one larger opening (that is, the opening size of the high-precision metal mask plate at the positions corresponding to the light-emitting part 302 of the first sub-pixel P1 and the light-emitting part 302 of the second sub-pixel P2 is increased). On the one hand, the manufacturing process of the high-precision metal mask plate is simplified, and on the other hand, the alignment difficulty of the high-precision metal mask plate process is reduced, and the probability of color mixing phenomenon is reduced.

[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 light-emitting color, and the first sub-pixel P1 and the second sub-pixel P2 are distributed at two opposite top corners of the pixel unit Q.

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

[0161] For example, the pixel electrode 301 and the light-emitting part 302 of the first sub-pixel P1 and the second sub-pixel P2 having the same light-emitting color have the same shape and the same area.

[0162] It can be understood that each pixel unit Q includes at least a first sub-pixel P1 and a second sub-pixel P2 having the same light-emitting color, and two sub-pixels having different light-emitting colors from the first sub-pixel P1 and the second sub-pixel P2.

[0163] With the above arrangement, the first sub-pixel P1 and the second sub-pixel P2 having the same light-emitting color are distributed at two opposite top corners of the pixel unit Q, and the first sub-pixel P1 is arranged adjacently with the other two sub-pixels having different light-emitting colors. Thus, uniform color mixing can be achieved, and the display quality of the display panel 300 is improved.

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

[0165] Thus, the color presented by the light emitting device 30 observed by the observer can be improved to avoid color deviation, thereby improving the display effect of the display panel 300; and the yield of the display panel 300 can be improved.

[0166] Embodiments of the present disclosure provide a preparation method of a display panel 300, the display panel 300 comprising a plurality of rectangular sub-pixel regions AA, each of the sub-pixel regions AA comprising an adjacent light emitting region A1 and a avoiding region A2, the avoiding region A2 comprising one corner of the rectangle, and the region of the rectangle other than the avoiding region A2 being the light emitting region A1. The preparation method comprises a1-a2.

[0167] a1, providing a substrate 10.

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

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

[0170] The pixel definition structure 40 is provided with a plurality of pixel openings 401, the pixel openings 401 are arranged in the light emitting region A1, and the shape of the pixel openings 401 is the same as that of the light emitting region A1. One pixel opening 401 corresponds to one pixel electrode 301, each pixel opening 401 can expose all of one pixel electrode 301 or only a part of one pixel electrode 301. The pixel electrode 301 comprises a main body portion 31 and a connecting portion 32 connected to each other; the shape of the main body portion 31 is the same as that of the pixel opening 401, the connecting portion 32 is located in the avoiding region A2, and the connecting portion 32 is connected to the driving circuit layer 20. One light emitting portion 302 is arranged in one pixel opening 401.

[0171] By setting one of the top corners of the rectangular sub-pixel region AA as the avoidance region A2, and setting the connecting portion 32 of the pixel electrode 301 in the avoidance region A2, the phenomenon of color deviation of the light-emitting device 30 presented by the observer can be improved, which is caused by the connecting portion 32 being set in the light-emitting region A1, so that the region of the pixel electrode 301 overlapping with the light-emitting portion 302 and the unevenness of the light-emitting portion 302 cause the light-emitting surface of the light-emitting device 30 not to be on the same surface, and the light-emitting angles at different positions are different, thereby improving the display effect of the display panel 300. Moreover, it is beneficial to the preparation of the subsequent light-emitting portion 302 and the common electrode 303 and the like structure, avoiding the phenomenon that the light-emitting film and the common electrode layer are residual due to the step difference of the surface of the part of the pixel electrode 301 exposed by the pixel opening 401 when the light-emitting portion 302 and the common electrode 303 and the like structure are formed by using a photolithography process, thereby providing the yield of the display panel 300.

[0172] In some examples, the step a2 can specifically include steps a21-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 and the like structure. The specific structure of the driving circuit layer 20 can refer to the description in some embodiments of the present disclosure, which will not be described here.

[0175] For example, the substrate 10 and the driving circuit layer 20 constitute a back plate 01, as shown in FIG. 10.

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

[0177] For example, the pixel electrode 301 can be formed by using a sputtering process, and then the pixel electrode film is patterned to form a plurality of pixel electrodes 301 arranged at intervals. For example, the material of the pixel electrode 301 can be an oxide, such as indium tin oxide (Indium Tin Oxide, ITO), indium zinc oxide (Indium Zinc Oxide, IZO), etc. 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 (Argentum, Ag) / ITO, aluminum (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 the side of the pixel electrode 301 away from the driving circuit layer 20.

[0179] In some examples, in the case that the pixel defining structure 40 comprises the pixel defining layer 41, the pixel defining structure 40 is formed on the side of the pixel electrode 301 away from the driving circuit layer 20 comprises: forming a pixel defining film on the side of the pixel electrode 301 away from the driving circuit layer 20, patterning the pixel defining film to form the pixel defining layer 41 with a plurality of pixel openings 401.

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

[0181] For example, in the case that the pixel defining layer 41 comprises an inorganic material, a pixel defining film with a certain thickness can be formed on the side of the pixel electrode 301 away from the driving circuit layer 20 by a physical vapor deposition (PVD) or a plasma enhanced chemical vapor deposition (PECVD) method, and then the pixel defining film is patterned by a photolithography process to form the pixel defining layer 41 with a plurality of pixel openings 401.

[0182] For example, in the case that the pixel defining layer 41 comprises an organic material, a pixel defining film with a certain thickness can be formed on the side of the pixel electrode 301 away from the driving circuit layer 20 by a coating process, and then the pixel defining film is patterned by a photolithography process to form the pixel defining layer 41 with a plurality of pixel openings 401.

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

[0184] It should be noted that, in the case that the pixel defining film comprises an inorganic material, the photolithography process can comprise: coating a photoresist on the pixel defining film, then disposing a mask plate on the side of the photoresist away from the substrate, exposing and developing the photoresist through the mask plate, removing the exposed part of the photoresist, and retaining the non-exposed part of the photoresist, thereby forming a patterned photoresist; then etching the pixel defining film with the patterned photoresist as a mask to remove the part of the pixel defining film not shielded by the patterned photoresist, thereby forming a plurality of pixel openings 401 and obtaining the pixel defining layer 41. Finally, the display panel 300 to be formed can be placed in a stripping liquid to dissolve and strip off the patterned photoresist layer.

[0185] In the case that the pixel defining film is made of organic material, the above photolithography process can include: disposing 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, and retaining the non-exposed part of the pixel defining film to form a plurality of pixel openings 401, and obtain the pixel defining layer 41.

[0186] In some examples, in the case that the pixel defining structure 40 includes the pixel defining layer 41 and the isolation structure 42, the pixel defining film 410 and the isolation film 420 can be sequentially formed by using a sputtering process, as shown in FIGS. 10 and 11. Then, the pixel defining film 410 and the isolation film 420 are subjected to a patterning process (e.g., etching) to form the pixel defining layer 41 having a plurality of first openings 411 and the isolation structure 42 having a plurality of second openings 421, one first opening 411 is disposed 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. In the case that the pixel defining structure 40 includes the pixel defining layer 41 and the isolation structure 42, the pixel opening 401 included in the pixel defining structure 40 can be understood as the first opening 411 disposed in the pixel defining layer 41.

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

[0188] For example, the material of the first sub-isolation film is titanium (Ti), and the material of the second sub-isolation film can be aluminum (Al). Because the wet etching rates of Ti and Al are different, in the process of etching the first sub-isolation film and the second sub-isolation film, it can be ensured that the second sub-isolation film is less affected by etching, and the first sub-isolation film has a faster etching speed, so as to facilitate the formation of an Undercut structure (e.g., a “T” shaped structure). Those skilled in the art can also select other suitable materials as long as the above technical effects can be achieved, and the embodiments of the present disclosure do not limit this.

[0189] In some examples, as shown in FIG. 10, before forming the pixel defining structure 40 and the plurality of light emitting parts 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, for protecting the pixel electrodes 301 to avoid damage to the pixel electrodes 301 when forming subsequent film layers (e.g., the pixel defining 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 colors of the plurality of light emitting devices 30 are various. In the step a23, the pixel openings 401 corresponding to the light emitting devices 30 of different colors are separately formed. In which, after the pixel openings 401 corresponding to the light emitting devices 30 of each preset color are formed, the light emitting part 302 and the common electrode 303 of the light emitting device 30 of the preset color are formed in the pixel opening 401. In the process of forming the light emitting device 30 of a certain color, the pixel opening 401 corresponding to the light emitting device 30 of the color is formed first, then the light emitting part 302 and the common electrode 303 of the light emitting device 30 of the color are formed in the pixel opening 401, and then the pixel opening 401 corresponding to the light emitting device 30 of another color and the light emitting part 302 in the pixel opening 401 are formed.

[0192] In some examples, after the light emitting part 302 and the common electrode 303 of the light emitting device 30 of each preset color are formed, the encapsulation sub-layer 03 needs to be formed. For example, the material of the encapsulation sub-layer 03 can be inorganic material. In the case that the material of the encapsulation sub-layer is inorganic material, the encapsulation sub-layer 03 can be formed by using a chemical vapor deposition (CVD) process.

[0193] Exemplarily, the plurality of light emitting devices 30 at least include 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 device 310 can emit red light, the second light emitting device 320 can emit blue light, and the third light emitting device 330 can emit green light.

[0194] In some examples, the step a23 can specifically include steps a231-a237.

[0195] a231, as shown in FIGS. 10 and 11, a plurality of pixel openings 401 corresponding to the first light emitting device 310 are formed.

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

[0197] In combination with FIG. 10 and FIG. 11, forming the plurality of pixel openings 401 corresponding to the first light emitting device 30 can specifically include: forming a first shielding layer 04 on the side of the isolation film 420 away from the pixel defining film 410, the first shielding layer 04 having a plurality of first sub-openings 041 arranged opposite the pixel openings 401 to be formed, one first sub-opening 041 being arranged opposite one 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. Etching the portions of the pixel defining film 410 and the isolation film 420 not covered by the first shielding layer 04 as a mask to form the pixel defining layer 41 having a plurality of first openings 411 and the isolation structure 42 having a plurality of second openings 421. The pixel openings 401 included in the pixel defining structure 40 can be understood as the first openings 411 arranged in the pixel defining layer 41.

[0198] For example, the first shielding layer 04 can be a photoresist layer.

[0199] For example, in the case that 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, in step a231, it further includes etching and removing the first sacrificial layer 02 arranged opposite the pixel electrode 301 of the first light emitting device 310.

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

[0201] a232, as shown in FIG. 12, forming the light emitting layer 3021, the common electrode layer 3031 and the first encapsulation film 031 of the first light emitting device 310 in the pixel openings 401 corresponding to the first light emitting device 310. The first encapsulation film 031 is used to form the encapsulation sub-layer 03 corresponding to the first light emitting device 30.

[0202] For example, part of the light emitting layer 3021 is located in the pixel opening 401, and another part of the light emitting layer 3021 is located on the side of the isolation film away from the substrate 10. Part of the common electrode layer 3031 is located in the pixel opening 401, and another part of the common electrode layer 3031 is located on the side of the isolation film away from the substrate 10. Part of the first encapsulation film 031 is located in the pixel opening 401, and another part 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 be formed by evaporation process. Due to the 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 is not in the same horizontal plane as the side of the pixel defining layer 41 away from the substrate 10), and the thicknesses of the light-emitting layer 3021, the common electrode layer 3031 and the first encapsulation film 031 are small, the part of the light-emitting layer 3021 located in the pixel opening 401 is discontinuously arranged with the part of the light-emitting layer 3021 located on the side of the isolation film away from the substrate 10; the part of the common electrode layer 3031 located in the pixel opening 401 is discontinuously arranged with the part of the common electrode layer 3031 located on the side of the isolation film away from the substrate 10; and the part of the first encapsulation film 031 located in the pixel opening 401 is discontinuously arranged with the part 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 the side of the first encapsulation film 031 away from the common electrode layer 3031, part of the cover film layer being located in the pixel opening 401 and another part of the cover film layer being located on the side of the isolation film away from the substrate 10. The cover film layer is used to protect the common electrode layer 3031 from damage caused by subsequent preparation processes.

[0205] a233, as shown in FIG. 12, a first photoresist layer 05 is formed on the side of the first encapsulation film 031 away from the common electrode layer 3031, the first photoresist layer 05 covering the first type of pixel opening 4011 and part of the pixel defining structure 40 around the first type of pixel opening 4011.

[0206] For example, a coating process can be used to form a first photoresist film on the side of the first encapsulation film 031 away from the common electrode layer 3031, and then exposure and development are performed to form the first photoresist layer 05.

[0207] a234, as shown in FIG. 13, using the first photoresist layer 05 as a mask, etching the parts of the light-emitting layer 3021 of the first light-emitting device 310 not covered by the first photoresist layer 05, the parts of the common electrode layer 3031 not covered by the first photoresist layer 05, and the parts of the first encapsulation film 031 not covered by the first photoresist layer 05, and removing the material layers in the regions outside the first type of pixel opening 4011, thereby obtaining the light-emitting part 302, the common electrode 303 and the encapsulation sub-layer 03 of the first light-emitting device 310.

[0208] It can be understood that after the light-emitting part 302, the common electrode 303 and the encapsulation sub-layer 03 of the first light-emitting device 310 are formed, the first photoresist layer 05 is peeled off.

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

[0210] a235, as shown in FIGS. 14 and 15, a plurality of pixel openings 401 corresponding to the second light emitting device 320 (i.e., the second type of pixel openings 4012 described above) are formed.

[0211] As shown in FIGS. 14 and 15, forming the plurality of pixel openings 401 corresponding to the second light emitting device 320 can specifically include: forming a second shielding layer 06 on the side of the isolation film away from the pixel defining film, the second shielding layer 06 having a plurality of second sub-openings 061 arranged opposite the pixel openings 401 to be formed, one second sub-opening 061 being arranged opposite one 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. Etching the portions of the pixel defining film 410 and the isolation film 420 not covered by the second shielding layer 06 as a mask, to form the pixel defining layer 41 having a plurality of first openings 411 and the isolation structure 42 having a plurality of second openings 421. The pixel openings 401 included in the pixel defining structure 40 can be understood as the first openings 411 arranged in the pixel defining layer 41.

[0212] For example, the second shielding layer 06 can be a photoresist layer.

[0213] It can be understood that after the second type of pixel openings 4012 are formed, the second shielding layer 06 described above is peeled off.

[0214] a236, as shown in FIG. 16, 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 openings 401 corresponding to the second light emitting device 320. The second encapsulation film 032 is used to form the encapsulation sub-layer 03 corresponding to the second light emitting device 320.

[0215] a237, the second photoresist layer 07 is formed on the side of the second encapsulation film 032 away from the common electrode layer 3031, the second photoresist layer 07 covering the second type of pixel openings 412 and part of the pixel defining structure 40 around the second type of pixel openings 412.

[0216] a238, as shown in FIG. 17, etching the portions of the light emitting layer 3021 not covered by the second photoresist layer 07, the portions of the common electrode layer 3031 not covered by the second photoresist layer 07, and the portions of the second encapsulation film 032 not covered by the second photoresist layer 07 as a mask, to form the light emitting part 302, the common electrode 303 and the encapsulation sub-layer 03 of the second light emitting device 320.

[0217] It can be understood that after the light emitting part 302, the common electrode 303 and the encapsulation sub-layer 03 of the second light emitting device 320 are formed, the second photoresist layer 07 is peeled off.

[0218] So far, the preparation of the second light emitting device 320 is completed.

[0219] a239, as shown in FIGS. 18 and 19, a plurality of pixel openings 401 corresponding to the third light emitting device 330 (i.e., the third type of pixel opening 4013) are formed.

[0220] As shown in FIGS. 18 and 19, forming a plurality of pixel openings 401 corresponding to the third light emitting device 330 can specifically include: forming a third shielding layer 08 on the side of the isolation film away from the pixel defining film 410, the third shielding layer 08 having a plurality of third sub-openings 081 opposite to the pixel openings 401 to be formed, one third sub-opening 081 being opposite to one 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. Taking the third shielding layer 08 as a mask, etching the part of the pixel defining film 410 and the isolation film 420 not covered by the third shielding layer 08 to form the pixel defining layer 41 having a plurality of first openings 411 and the isolation structure 42 having a plurality of second openings 421. It can be understood that the pixel openings 401 included in the pixel defining structure 40 are the first openings 411 provided in the pixel defining layer 41.

[0221] For example, the third shielding layer 08 can be a photoresist layer.

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

[0223] a2310, as shown in FIG. 20, the light emitting layer 3021, the common electrode layer 3031 and the third encapsulation film 033 of the third light emitting device 330 are formed in the pixel openings 401 corresponding to the third light emitting device 330. The third encapsulation film 033 is used to form the encapsulation sub-layer 03 corresponding to the second light emitting device 320.

[0224] a2311, as shown in FIG. 20, a third photoresist layer 09 is formed on the side of the third encapsulation film 033 away from the common electrode layer 3031, the third photoresist layer 09 covering the third type of pixel opening 4013 and part of the pixel defining structure 40 around the third type of pixel opening 4013.

[0225] a2312, as shown in FIG. 21, the third photoresist layer 09 is used as a mask to etch the part of the light-emitting layer 3021 not covered by the third photoresist layer 09, the part of the common electrode layer 3031 not covered by the third photoresist layer 09, and the part of the third encapsulation film 033 not covered by the third photoresist layer 09, to form the light-emitting part 302, the common electrode 303, and the encapsulation sub-layer 03 of the third light-emitting device 330.

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

[0227] So far, the preparation of the third light-emitting device 330 is completed.

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

[0229] For example, the material of the organic encapsulation layer 010 includes a polymer combination of one or more of an acrylic-based polymer, a silicon-based polymer, and an epoxy-based polymer. The above material is prepared on the encapsulation sub-layer 03 by using an Ink Jet Printing (IJP) method, and is subjected to ultraviolet (UV) curing to form the organic encapsulation layer 010.

[0230] For example, the material of the inorganic encapsulation layer 011 includes a combination of one or more of silicon nitride (SiNx), silicon dioxide (SiOx), and silicon oxynitride (SiON). The inorganic encapsulation layer 011 can be formed by using a Chemical Vapor Deposition (CVD) process.

[0231] In some examples, before the plurality of pixel electrodes 301, the pixel definition structure 40, the light-emitting part 302, and the pixel definition structure 40 are formed on the side of the driving circuit layer 20 away from the substrate 10, an insulating medium layer 50 can also be formed on the side of the driving circuit layer 20 away from the substrate 10.

[0232] For example, the insulating medium layer 50 can make the surface of the driving circuit layer 20 relatively flat, which is conducive to the subsequent preparation of the pixel electrode 301 and other structures. The material of the insulating medium layer 50 can include an organic material, and the insulating medium layer 50 can be formed by using an Ink Jet Printing process.

[0233] The preparation method of the display panel 300 provided by the embodiment of the present disclosure sets one corner of the rectangular sub-pixel region AA as the avoiding area A2, sets the connecting part 32 of the pixel electrode 301 in the avoiding area A2, and electrically connects the driving circuit layer 20 through the via hole 501 of the insulating medium layer 50 located in the avoiding area A2. On the one hand, the phenomenon of color deviation of the light-emitting device 30 presented by the observer can be improved, and the display effect of the display panel 300 is improved. The light-emitting part 302 and the connecting part 32 of the pixel electrode 301 are arranged in the same area, and the light-emitting part 302 and the connecting part 32 of the pixel electrode 301 are arranged in the same area.

[0234] On the other hand, in the case of preparing the light-emitting part 302 and the common electrode 303 by using the photolithography process, the one corner of the rectangular sub-pixel region AA is set as the avoiding area A2, and the connecting part 32 of the pixel electrode 301 is arranged in the avoiding area A2. This is also conducive to the preparation of the light-emitting part 302 and the common electrode 303 and other structures in the subsequent process. The surface of the part of the pixel electrode 301 exposed by the pixel opening 401 has a step difference, which causes the light-emitting film and the common electrode layer to be residual, and causes the display panel 300 to have a GDS defect. The yield of the display panel 300 is provided. In addition, the light-emitting part 302 and the common electrode 303 are prepared by using the photolithography process, which reduces the preparation difficulty of the display panel 300, reduces the preparation cost of the display panel 300, and makes the arrangement density of each light-emitting device in the display panel 300 not be limited by the size of the FMM. This is conducive to improving the pixel density of the display panel 300, and does not need to use the FMM and the etching process, thereby avoiding the problem of inaccurate alignment.

[0235] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope 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 light-emitting region and an avoidance region, the avoidance region comprising one corner of the rectangle, and the region of the rectangle other than the avoidance region being the light-emitting region; the display panel comprising: a substrate, a driving circuit layer disposed on the substrate, and a plurality of pixel electrodes disposed on a side of the driving circuit layer away from the substrate; a pixel definition structure disposed on a side of the plurality of pixel electrodes away from the driving circuit layer, the pixel definition structure being provided with a pixel opening in the light-emitting region, the pixel opening having the same shape as the light-emitting region; a plurality of light-emitting portions, one light-emitting portion being disposed in one pixel opening; wherein one pixel opening corresponds to one pixel electrode, the pixel electrode comprising a main body portion and a connecting portion connected to each other, the main body portion having the same shape as the pixel opening, the connecting portion being located in the avoidance region, and the connecting portion being connected to the driving circuit layer. A boundary of the main body portion comprises two straight angle sides and a set side connected to each other, one end of the two straight angle sides being connected and forming a right angle, the two ends of the two straight angle sides away from each other being connected to two ends of the set side, and the set side comprising 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 away from the main body portion and is connected to the driving circuit layer. The two ends of the arc segment are connected to the two ends of the two straight angle sides away from each other, respectively. The set side further comprises two straight line segments, the two straight line segments being located at the two ends of the arc segment, and the straight line segments being connected to one end of the arc segment and one end of one of the straight angle sides. The curvature radius of the arc segment is less than or equal to the size of the straight angle side.

2. The display panel of claim 1, wherein, The shape of the main body portion in the orthographic projection on the substrate is a sector, or approximately a sector, or a pentagon obtained by cutting a corner from a rectangle. The display panel comprises a plurality of pixel units, each of the pixel units comprising four sub-pixels arranged in a 2 × 2 matrix, each of the sub-pixels comprising a pixel electrode and a corresponding light-emitting portion thereof; 3. The display panel of claim 2, wherein, The set sides of the main body portions of the pixel electrodes of the four sub-pixels are close to each other and enclose a containing region; 4. The display panel of claim 2, wherein, The connecting portions of the pixel electrodes of the four sub-pixels are close to each other and located in the containing region.

5. The display panel of claim 3, wherein, The connecting line formed between the ends of the connecting portions of the four sub-pixels away from the main body portions thereof forms a square shape.

6. The display panel of claim 1, wherein, The display panel comprises a plurality of pixel units, each of the pixel units comprising four sub-pixels arranged in a 2 × 2 matrix, each of the sub-pixels comprising a pixel electrode and a corresponding light-emitting portion thereof; 7. The display panel of claim 2, wherein, Along a circumferential direction around the center of the pixel unit, the main body portions and the connecting portions of the four pixel electrodes of the four sub-pixels are arranged alternately. The connecting portions extend along the tangential direction of the circumferential direction around the center of the pixel unit. ​ 8. The display panel of claim 7, wherein, ​ 9. The display panel of claim 2, wherein, ​ ​ 10. The display panel of claim 9, wherein, ​ 11. The display panel according to any one of claims 7 to 10, wherein Among the pixel electrodes of the four sub-pixels, at least one pair of adjacent pixel electrodes are symmetrically arranged relative to a reference line; wherein the reference line is a bisector between the two adjacent pixel electrodes and is perpendicular to the arrangement direction of the two adjacent pixel electrodes.

12. The display panel of claim 11, wherein, Each of the pixel units comprises at least a first sub-pixel and a second sub-pixel with the same color of light emission, and the first sub-pixel and the second sub-pixel are distributed at two adjacent top corners of the pixel unit.

13. The display panel of claim 11, wherein, Each of the pixel units comprises at least a first sub-pixel and a second sub-pixel with the same color of light emission, and the first sub-pixel and the second sub-pixel are distributed at two opposite top corners of the pixel unit.

14. The display panel of claim 1, wherein, Further comprising: an insulating medium layer between the driving circuit layer and the pixel electrode, a via hole is arranged on the insulating medium layer, the connecting part is connected with the driving circuit layer through the via hole, and the opening is located in the avoiding area.

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

Images