Display panel, preparation method thereof and display device

Abstract

The invention relates to a display panel, a preparation method thereof and a display device. The display panel includes: an array substrate; the first pixel defining layer is arranged on one side of the array substrate; a plurality of first grooves are formed in the first pixel defining layer; the auxiliary electrode comprises a plurality of electrode lap joint parts, and the plurality of electrode lap joint parts are correspondingly arranged in the plurality of first grooves; the isolation structure is arranged on one side, far away from the array substrate, of the first pixel defining layer and defines a plurality of isolation openings; the plurality of isolation openings are arranged corresponding to the plurality of electrode lap joint parts; the plurality of light-emitting devices are arranged on one side of the array substrate; the plurality of light-emitting devices are arranged corresponding to the plurality of isolation openings; at least part of the light-emitting device is arranged in the corresponding isolation opening; the light-emitting device comprises a first electrode, a light-emitting part and a second electrode which are stacked along one side far away from the array substrate; and the second electrodes are electrically connected with the corresponding electrode overlapping parts. By adopting the scheme, the yield of display panel finished products can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a display panel and a method for manufacturing the same, and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display technology is considered the most promising new display technology for the next generation. Compared with liquid crystal display technology, OLED display technology has advantages such as low energy consumption, low cost, self-luminescence, wide viewing angle, and fast response speed.

[0003] Traditionally, pixel patterning is achieved through the use of a fine metal mask (FMM) during the production of OLED display panels. FMM technology is mature and boasts extensive mass production experience. However, it also suffers from limitations such as limited precision and high costs. FMM-free technology eliminates the limitations of traditional OLED processes on display size, resolution, and other performance characteristics, offering the advantages of high performance, full-scale scalability, and agile delivery. Patents CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, PCT / CN2024 / 099072, CN117979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A record relevant content of the fine metal mask-free technology for reference.

[0004] However, the yield rate of OLED display panels produced by this manufacturing process is currently low. Summary of the Invention

[0005] In order to overcome the technical problems mentioned in the above technical background, embodiments of the present application provide a display panel and a method for manufacturing the same, and a display device.

[0006] In a first aspect, the present application provides a display panel, comprising:

[0007] an array substrate;

[0008] A first pixel defining layer is provided on one side of the array substrate; the first pixel defining layer is provided with a plurality of first grooves;

[0009] an auxiliary electrode, comprising a plurality of electrode overlapping portions, wherein the plurality of electrode overlapping portions are correspondingly disposed in the plurality of first grooves;

[0010] an isolation structure, disposed on a side of the first pixel defining layer away from the array substrate, and defining a plurality of isolation openings; the plurality of isolation openings are disposed corresponding to the plurality of electrode overlapping portions;

[0011] A plurality of light-emitting devices are arranged on one side of the array substrate; the plurality of light-emitting devices are arranged corresponding to the plurality of isolation openings; at least part of the light-emitting devices is arranged in the corresponding isolation openings; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked along a side away from the array substrate; the second electrode is electrically connected to the corresponding electrode overlapping portion.

[0012] In one embodiment, the auxiliary electrode further includes a main body portion, the main body portion is disposed on a side of the plurality of electrode overlapping portions close to the array substrate; the main body portion is electrically connected to the plurality of electrode overlapping portions;

[0013] Optionally, the orthographic projection of the main body on the array substrate is in a grid shape.

[0014] In one embodiment, the orthographic projection of the isolation structure on the array substrate covers the orthographic projection of the main body on the array substrate;

[0015] Optionally, an orthographic projection of the main body on the array substrate overlaps at least partially with an orthographic projection of each of the first electrodes on the array substrate.

[0016] In one embodiment, the display panel further includes a second pixel defining layer disposed on a side of the first pixel defining layer close to the array substrate;

[0017] A second groove is formed on a side of the second pixel defining layer away from the array substrate, and the main body is disposed in the second groove;

[0018] Optionally, the second groove is in communication with the plurality of first grooves;

[0019] Optionally, the orthographic projection of the second groove on the array substrate is in a grid shape.

[0020] In one embodiment, the isolation structure includes a plurality of film layers, and the material of the film layer on the side of the isolation structure close to the array substrate includes an insulating material;

[0021] Optionally, the isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the array substrate, and an orthographic projection of the second isolation portion on the array substrate covers an orthographic projection of the first isolation portion on the array substrate;

[0022] Optionally, the material of the second isolation portion includes titanium or molybdenum; and the material of the first isolation portion includes an inorganic insulating material.

[0023] In one embodiment, the orthographic projection of the first isolation portion on the array substrate does not overlap with the orthographic projections of the plurality of electrode overlapping portions on the array substrate;

[0024] The orthographic projection of the second isolation portion on the array substrate covers the orthographic projections of the plurality of electrode overlapping portions on the array substrate.

[0025] In one embodiment, the plurality of grids of the main body are arranged corresponding to the plurality of isolation openings;

[0026] Along the first direction, the distance between two opposite sides of the grid of the main body is a first distance L1, and the distance between two opposite sides of the isolation opening is a second distance L2. The first distance L1 is greater than the second distance L2.

[0027] In one embodiment, each of the electrode overlapping portions is disposed on one side of the corresponding isolation opening;

[0028] Optionally, each of the electrode overlapping portions is provided on one of two sides of the corresponding isolation opening that are opposite to each other along a second direction, and the second direction is parallel to an extension direction of the scanning lines in the array substrate;

[0029] Optionally, the display panel includes a display area and a non-display area surrounding the display area, and the auxiliary electrode extends from the display area to the non-display area and is connected to a power signal line.

[0030] In one embodiment, along the first direction, the length of the electrode overlap portion is a first length H1, the distance between two opposite sides of the isolation opening corresponding to the electrode overlap portion is a second distance L2, and the first length H1 is greater than or equal to the second distance L2.

[0031] In a second aspect, the present application further provides another display panel, comprising:

[0032] an array substrate;

[0033] a second pixel defining layer, disposed on one side of the array substrate, wherein a second groove is formed on a side of the second pixel defining layer away from the array substrate;

[0034] a first pixel defining layer, disposed on a side of the second pixel defining layer away from the array substrate; the first pixel defining layer is provided with a plurality of first grooves;

[0035] an auxiliary electrode, comprising a main body portion and a plurality of electrode overlapping portions, wherein the main body portion is disposed in the second groove, and the plurality of electrode overlapping portions are correspondingly disposed in the plurality of first grooves; the main body portion is electrically connected to the plurality of electrode overlapping portions;

[0036] an isolation structure, disposed on a side of the first pixel defining layer away from the array substrate, and defining a plurality of isolation openings; the plurality of isolation openings are disposed corresponding to the plurality of electrode overlapping portions;

[0037] A plurality of light-emitting devices are arranged on one side of the array substrate; the plurality of light-emitting devices are arranged corresponding to the plurality of isolation openings; at least part of the light-emitting devices is arranged in the corresponding isolation openings; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked along a side away from the array substrate; the second electrode is electrically connected to the corresponding electrode overlapping portion.

[0038] In one embodiment, the orthographic projection of the main body on the array substrate is in a grid shape;

[0039] Optionally, the second groove is in communication with the plurality of first grooves;

[0040] Optionally, the orthographic projection of the second groove on the array substrate is in a grid shape.

[0041] In one embodiment, the orthographic projection of the isolation structure on the array substrate covers the orthographic projection of the main body on the array substrate;

[0042] Optionally, an orthographic projection of the main body on the array substrate overlaps at least partially with an orthographic projection of each of the first electrodes on the array substrate.

[0043] In one embodiment, the isolation structure includes a plurality of film layers, and the material of the film layer on the side of the isolation structure close to the array substrate includes an insulating material;

[0044] Optionally, the isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the array substrate, and an orthographic projection of the second isolation portion on the array substrate covers an orthographic projection of the first isolation portion on the array substrate;

[0045] Optionally, the material of the second isolation portion includes titanium or molybdenum; and the material of the first isolation portion includes an inorganic insulating material.

[0046] In one embodiment, the orthographic projection of the first isolation portion on the array substrate does not overlap with the orthographic projections of the plurality of electrode overlapping portions on the array substrate;

[0047] The orthographic projection of the second isolation portion on the array substrate covers the orthographic projections of the plurality of electrode overlapping portions on the array substrate.

[0048] In one embodiment, the orthographic projection of the first isolation portion on the array substrate overlaps at least partially with the orthographic projection of the main body portion on the array substrate;

[0049] The orthographic projection of the second isolation portion on the array substrate covers the orthographic projection of the main body portion on the array substrate.

[0050] In one embodiment, the plurality of grids of the main body are arranged corresponding to the plurality of isolation openings; along the first direction, the distance between two opposite sides of the grids of the main body is a first distance L1, and the distance between two opposite sides of the isolation opening is a second distance L2, and the first distance L1 is greater than the second distance L2;

[0051] In one embodiment, each of the electrode overlapping portions is disposed on one side of the corresponding isolation opening;

[0052] Optionally, each of the electrode overlapping portions is provided on one of two sides of the corresponding isolation opening that are opposite to each other along a second direction, and the second direction is parallel to an extension direction of the scanning lines in the array substrate;

[0053] Optionally, the display panel includes a display area and a non-display area arranged around the display area, and the main body extends from the display area to the non-display area and is connected to the power signal line.

[0054] In one embodiment, along the first direction, the length of the electrode overlap portion is a first length H1, the distance between two opposite sides of the isolation opening corresponding to the electrode overlap portion is a second distance L2, and the first length H1 is greater than or equal to the second distance L2.

[0055] In a third aspect, a method for preparing a display panel is provided, the method comprising:

[0056] providing an array substrate;

[0057] forming a first pixel defining layer on one side of the array substrate, and defining a plurality of first grooves in the first pixel defining layer;

[0058] forming a first metal layer on a side of the first pixel defining layer away from the array substrate, and patterning the first metal layer to obtain a plurality of electrode overlapping portions of the auxiliary electrode; the plurality of electrode overlapping portions are correspondingly disposed in the plurality of first grooves;

[0059] An isolation structure is formed on a side of the first pixel defining layer away from the array substrate, wherein the isolation structure is provided with a plurality of isolation openings; the plurality of isolation openings are provided corresponding to the plurality of electrode overlapping portions;

[0060] A plurality of light-emitting devices are formed on one side of the array substrate; the plurality of light-emitting devices are arranged corresponding to the plurality of isolation openings; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked along a side away from the array substrate; the second electrode is electrically connected to the corresponding electrode overlapping portion.

[0061] In one embodiment, before forming the first pixel defining layer on one side of the array substrate, the preparation method further includes:

[0062] forming a second pixel defining layer on one side of the array substrate; and forming a second groove in the second pixel defining layer;

[0063] forming a second metal layer on a side of the second pixel defining layer away from the array substrate, and patterning the second metal layer to obtain a main body portion of the auxiliary electrode; the main body portion is located in the second groove; wherein the main body portion is electrically connected to the plurality of electrode overlapping portions;

[0064] Correspondingly, forming a first pixel defining layer on one side of the array substrate includes:

[0065] The first pixel defining layer is formed on a side of the second pixel defining layer away from the array substrate.

[0066] In a fourth aspect, an embodiment of the present application provides a display device, comprising the display panel according to any one of the first aspect or the second aspect.

[0067] The first pixel defining layer of the above-mentioned display panel is provided with a plurality of first grooves, and a plurality of electrode overlapping portions are correspondingly arranged in the plurality of first grooves. In this way, when evaporating the light-emitting device, the second electrode of the light-emitting device is connected to the electrode overlapping portion by controlling the evaporation angle, thereby achieving directional overlapping, which can effectively prevent leakage of the display panel and thereby improve the finished product yield of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0069] Figure 1 is a schematic structural diagram of a display panel in one embodiment;

[0070] Figure 2 is one of the cross-sectional views of the display panel in the second direction in one embodiment;

[0071] Figure 3 is a cross-sectional view of an array substrate in one embodiment;

[0072] Figure 4 is a schematic diagram of a pixel circuit in one embodiment;

[0073] Figure 5 is a schematic top view of an auxiliary electrode in one embodiment;

[0074] Figure 6 is a schematic diagram of a light-emitting portion in one embodiment;

[0075] Figure 7 is a second cross-sectional view of the display panel in the second direction according to an embodiment;

[0076] Figure 8 is one of the cross-sectional views of the display panel in the first direction according to an embodiment;

[0077] Figure 9 is a perspective view showing a panel in one embodiment;

[0078] Figure 10A A diagram showing the relationship between the position and size of the grids of the isolation opening and the main body in one embodiment;

[0079] Figure 10B A diagram showing the relationship between the position and size of the isolation opening and the electrode overlap portion in one embodiment;

[0080] Figure 11 The third cross-sectional view of the display panel in the second direction according to an embodiment;

[0081] Figure 12 This is a second cross-sectional view of the display panel in the first direction according to an embodiment;

[0082] Figure 13 1 is a schematic flow chart of a method for preparing a display panel in one embodiment;

[0083] Figure 14A schematic diagram of the preparation process in the second direction in one embodiment;

[0084] Figure 15 This is a schematic diagram of the preparation process in the first direction in one embodiment.

[0085] Description of reference numerals:

[0086] AA, display area; NA, non-display area; PX, pixel; SPX1, first sub-pixel; SPX2, second sub-pixel; SPX3, third sub-pixel;

[0087] 1. Display panel; 10. Array substrate 10; 11. First pixel defining layer; 12. Auxiliary electrode; 13. Isolation structure; 14. Light-emitting device; 15. Second pixel defining layer; 16. Encapsulation unit; 17. Planarization layer; 18. Transistor;

[0088] 111, first groove; 121, electrode overlapping portion; 122, main body; 131, first isolation portion; 132, second isolation portion; 141, first electrode; 142, light-emitting portion; 143, second electrode; 151, second groove;

[0089] 11a, first pixel opening; 13a, isolation opening; 15a, second pixel opening; 122a, grid; M1, first metal layer; M2, second metal layer; M3, first electrode layer; T1, drive transistor; T2, data transistor; C1, storage capacitor. DETAILED DESCRIPTION

[0090] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0091] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0092] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. It should be noted that different features in the embodiments of the present application can be combined with each other without conflict.

[0093] For ease of understanding, the drawings show mutually orthogonal X-axis, Y-axis, and Z-axis. The direction along the X-axis is referred to as the X-direction, the direction along the Y-axis is referred to as the Y-direction, and the direction along the Z-axis is referred to as the Z-direction. The Z-direction is the normal direction relative to the plane containing the X-direction and the Y-direction. In addition, the situation where various elements are viewed parallel to the plane containing the X-direction and the Y-direction is referred to as a top view. Alternatively, the planes in the X-direction and the Y-direction are parallel to the display surface of the display panel, and the Z-direction is parallel to the thickness direction of the display panel.

[0094] For certain elements, terms such as "upper" or "above" are sometimes used to describe the position of the element in the Z direction, while "lower" or "below" is used to describe the position of the element in the opposite direction. In addition, when terms such as "upper," "above," "lower," "below," and "relatively" are used to define the relative position of two elements, they include not only a state in which the two elements are directly connected, but also a state in which the two elements are separated by a gap or other elements. In addition, terms such as "first," "second," and "third" are used only to distinguish and describe, and should not be understood to indicate or imply relative importance.

[0095] In the description of this application, it should be understood that "electrical connection" in this application can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in a circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals.

[0096] Figure 1 This is a schematic diagram of the structure of a display panel 1 according to one embodiment of the present application. The display panel 1 can be an organic light-emitting diode (OLED) display panel or a quantum dot light-emitting diode (QLED) display panel. The display panel 1 includes a display area AA with display functionality and a non-display area NA, which surrounds the display area AA.

[0097] The display area AA of the display panel 1 may be in a rectangular shape, or in other shapes such as a square, a circle, or an ellipse.

[0098] The display area AA includes a plurality of pixels PX arranged in the X and Y directions. The pixels PX include a plurality of sub-pixels SPX that display different colors. In some embodiments, the pixels PX include a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. For example, the first sub-pixel SPX1 is a blue sub-pixel, the second sub-pixel SPX2 is a green sub-pixel SPX2, and the third sub-pixel SPX3 is a red sub-pixel SPX3. In some embodiments, in addition to the sub-pixels SPX1, SPX2, and SPX3, the pixels PX also include sub-pixels SPX that emit white light or other colors.

[0099] Subpixels SPX include pixel circuits and light-emitting devices driven by the pixel circuits to emit corresponding colors of light. The first subpixel SPX1 includes a first light-emitting device, the second subpixel SPX2 includes a second light-emitting device, and the third subpixel SPX3 includes a third light-emitting device. Each pixel circuit drives at least one light-emitting device to emit light. For example, the display area AA includes a normal display area and a light-transmitting display area. The light-transmitting display area is the display area configured for a corresponding sensor and has light-transmitting properties, while the normal display area is the display area not configured for a corresponding sensor. In the normal display area, one pixel circuit drives one light-emitting device to emit light, while in the light-transmitting display area, one pixel circuit drives one or more light-emitting devices to emit light.

[0100] In one embodiment, Figure 2 Shown Figure 1 Schematic diagram of the cross-sectional structure of a portion of the film layer in the BB direction of a local area of ​​the display panel 1. Figure 2 The display panel includes an array substrate 10 , a first pixel defining layer 11 , an auxiliary electrode 12 , an isolation structure 13 and a plurality of light emitting devices 14 .

[0101] refer to Figure 3 The array substrate 10 includes a substrate, a pixel circuit layer, and a planarization layer 17 disposed on one side of the substrate. The substrate may include a first PI substrate layer, a first barrier layer, a second PI substrate layer, and a second barrier layer stacked in sequence. The first PI substrate layer and the second PI substrate layer are collectively referred to as substrate layers. Exemplarily, the substrate is a flexible material, enabling the display panel to bend, thereby enabling the display panel to achieve functions such as curved display, foldable display, or roll-up display. For example, the flexible substrate material may be PI (Polyimide), PC (polycarbonate), or PVC (polyvinylchloride). The substrate may also be a rigid material, such as glass or plastic. In other words, the display panel in this embodiment may be a rigid, non-bendable display panel or a flexible, bendable display panel.

[0102] The array substrate 10 also includes a light-shielding layer, a third barrier layer, and a buffer layer located between the substrate and the pixel circuit layer. The light-shielding layer is located on the side of the second barrier layer away from the substrate layer. It blocks light emitted from the outside toward the substrate, preventing it from affecting the active layer in the pixel circuit layer. The light-shielding layer may be composed of a black matrix, the material of which is capable of blocking light. The third barrier layer is located on the side of the light-shielding layer away from the substrate layer. The first, second, and third barrier layers are collectively referred to as barrier layers. The material of the first, second, and third barrier layers includes SiOx (Silicon Oxide). The buffer layer is located on the side of the third barrier layer away from the substrate layer and may include an inorganic layer or an organic layer. Exemplarily, the buffer layer may be formed from inorganic materials such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, or aluminum nitride, or organic materials such as acrylic, polyimide, or polyester. The buffer layer may comprise a single layer or multiple layers. The buffer layer serves to block oxygen and moisture, preventing moisture or impurities from diffusing through the substrate. It also provides a flat surface on the upper surface of the substrate, thereby facilitating the fabrication of the active layer in the pixel circuit layer. For example, the buffer layer in this embodiment is made of SiNx (Silicon Nitride).

[0103] The pixel circuit layer includes a pixel circuit for driving the light emitting device 14 to emit light. Figure 3 The transistor 18 in the pixel circuit is shown. A via is provided in the planarization layer 17, and the first electrode 141 is electrically connected to the transistor 18 in the pixel circuit layer through the via. Furthermore, the pixel circuit layer includes at least one insulating layer, which can include at least one of an inorganic layer and an organic layer. Furthermore, the array substrate 10 also includes scan lines that provide scan signals Scan and data lines that provide data signals Data to the pixel circuits.

[0104] refer to Figure 4 The pixel circuit includes a driving transistor T1 and a data transistor T2, the source of the data transistor T2 is connected to a data line providing a data signal Data, the gate of the data transistor T2 is connected to a scan line providing a scan signal Scan, the drain of the data transistor T2 is connected to the gate of the driving transistor T1, the two ends of the storage capacitor C1 are respectively connected to the gate and source of the driving transistor T1, and the drain of the driving transistor T1 is connected to the light-emitting device 14. Figure 4 This is an embodiment of the pixel circuit. The pixel circuit of this application is not limited to Figure 4 The 2T1C pixel circuit shown may also be other pixel circuits, such as a 7T1C, 8T1C pixel circuit, etc.

[0105] The first pixel defining layer 11 is disposed on one side of the array substrate 10 , and the first pixel defining layer 11 is provided with a plurality of first grooves 111 ( Figure 2 (See the dotted circle in the figure). Figure 2 and Figure 5 As shown, Figure 5 A schematic top view of the auxiliary electrode 12 is provided. The auxiliary electrode 12 includes a plurality of electrode overlapping portions 121 . The plurality of electrode overlapping portions 121 are correspondingly disposed in the plurality of first grooves 111 .

[0106] The first pixel defining layer 11 defines a plurality of first pixel openings 11a. The sidewalls of the first pixel defining layer 11 adjacent to the first pixel openings 11a may be inclined or curved. The plurality of first pixel openings 11a are disposed correspondingly to the plurality of first electrodes 141, with at least a portion of the surface of each first electrode 141 exposed from the corresponding first pixel opening 11a. The plurality of first pixel openings 11a and the plurality of first electrodes 141 should be disposed in a manner that the plurality of first pixel openings 11a correspond one-to-one with the plurality of first electrodes 141. The material of the first pixel defining layer 11 is an inorganic material. For example, the first pixel defining layer 11 may be formed using at least one of the inorganic insulating materials selected from silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON). The first pixel defining layer 11 defines the light-emitting area of ​​each sub-pixel, thereby preventing diffusion of the light-emitting functional material and color mixing between sub-pixels.

[0107] A plurality of first grooves 111 are provided on the first pixel defining layer 11. The plurality of first grooves 111 are arranged in one-to-one correspondence with the first pixel opening 11a, and the first grooves 111 are arranged on one side of the corresponding first pixel opening 11a. The first groove 111 can be a groove that passes through the first pixel defining layer 11 along the thickness direction of the array substrate 10, or a groove that does not pass through the first pixel defining layer 11 along the thickness direction of the array substrate 10, which is not limited here. The sidewalls of the first groove 111 can be inclined surfaces or curved surfaces, so that when the electrode overlapping portion 121 is prepared, the electrode overlapping portion 121 is not prone to breakage, thereby ensuring the power supply stability of the auxiliary electrode 12 and thereby improving the finished product yield of the display panel; the sidewalls of the first groove 111 can also be perpendicular surfaces relative to the plane where the array substrate 11 is located, which is not limited here.

[0108] Along the second direction y, a plurality of first grooves 111 are arranged at intervals. The second direction y is the same as the scanning direction, which refers to the direction of movement of the nozzle during the OLED printing process (the evaporation Scan direction). The second direction y can also be parallel to the extension direction of the scan lines (Scan lines) providing the scan signals Scan in the array substrate 10. It can be understood that the array substrate 10 includes multiple scan lines, which are arranged at intervals along the first direction x. Each scan line extends along the second direction y, and the first direction x and the second direction y intersect.

[0109] The multiple electrode overlapping portions 121 of the auxiliary electrode 12 are correspondingly arranged in the multiple first grooves 111. This may mean that the multiple electrode overlapping portions 121 are correspondingly arranged in the multiple first grooves 111, or each electrode overlapping portion 121 is arranged in two or more first grooves 111. Optionally, the multiple electrode overlapping portions 121 are correspondingly arranged in the multiple first grooves 111.

[0110] The thickness of the electrode overlapping portion 121 can be equal to the depth of the first groove 111 (that is, the electrode overlapping portion 121 completely fills the first groove 111), the thickness of the electrode overlapping portion 121 can also be greater than the depth of the first groove 111 (that is, the electrode overlapping portion 121 fills and protrudes from the first groove 111), and the thickness of the electrode overlapping portion 121 can also be less than the depth of the first groove 111 (that is, the electrode overlapping portion 121 does not fill the first groove 111), which is not limited here.

[0111] The electrode overlap portion 121 is made of a metal material, such as aluminum, titanium, copper, or a combination thereof. Each electrode overlap portion 121 is electrically connected to the ELVSS power line to provide a negative voltage to the light emitting device 14 .

[0112] An isolation structure 13 is disposed on a side of the first pixel defining layer 11 away from the array substrate 10 and defines a plurality of isolation openings 13a. The plurality of isolation openings 13a are disposed correspondingly to the plurality of electrode overlapping portions 121. A plurality of light-emitting devices 14 are disposed on a side of the array substrate 10. The plurality of light-emitting devices 14 are disposed correspondingly to the plurality of isolation openings 13a. At least portions of the light-emitting devices 14 are disposed within the corresponding isolation openings 13a. The light-emitting devices 14 include a first electrode 141, a light-emitting portion 142, and a second electrode 143 stacked along the side away from the array substrate 10. The second electrode 143 is electrically connected to the corresponding electrode overlapping portion 121.

[0113] The isolation structure 13 refers to a structure that can isolate the light-emitting portion 142 of the adjacent light-emitting device 14 when the light-emitting functional material of the light-emitting device 14 is evaporated. By providing the isolation structure 13, a patterned photolithography process can be used for the light-emitting device 14, thereby eliminating FMM, which is beneficial to improving PPI. Furthermore, since the light-emitting device 14 is manufactured by a patterned photolithography process, the isolation structure 13 can make the shape of the light-emitting device 14 richer and the arrangement more optimized compared to the display panel that uses FMM to evaporate the light-emitting device 14. In the embodiment of the present application, the isolation structure 13 is an undercut structure with a "large top and small bottom". When the light-emitting portion 142 of the light-emitting device 14 is evaporated, the undercut structure can isolate the light-emitting portion 142.

[0114] The isolation openings 13a extend through the isolation structure 13 along the thickness direction of the array substrate 10, and the plurality of isolation openings 13a are connected to the plurality of first pixel openings 11a in a one-to-one correspondence. The plurality of isolation openings 13a include a plurality of first isolation openings, a plurality of second isolation openings, and a plurality of third isolation openings. The plurality of first pixel openings 11a include pixel openings connected to the first isolation openings, pixel openings connected to the second isolation openings, and pixel openings connected to the third isolation openings. The orthographic projections of the first pixel openings 11a and the corresponding isolation openings 13a on the array substrate 10 may be the same or different. Generally speaking, the orthographic projection area of ​​the isolation opening 13a on the array substrate 10 is larger than the orthographic projection area of ​​the first pixel opening 11a connected to the isolation opening 13a on the array substrate 10. The orthographic projection of the first pixel opening 11a of the light-emitting device 14 on the array substrate 10 overlaps with the orthographic projection of the isolation opening 13a on the array substrate 10.

[0115] Multiple isolation openings 13a are arranged correspondingly to multiple electrode overlapping portions 121, which may mean that multiple isolation openings 13a and multiple electrode overlapping portions 121 are arranged in a one-to-one correspondence, and each electrode overlapping portion 121 is arranged on one side of the corresponding isolation opening; specifically, each electrode overlapping portion 121 is arranged on one side of the two sides of the corresponding isolation opening 13a that are relatively arranged along the second direction y.

[0116] The positional relationship between each electrode overlapping portion 121 and the isolation structure 13 may be such that the orthographic projection of the isolation structure 13 on the array substrate 10 covers the orthographic projection of each electrode overlapping portion 121 on the array substrate 10 .

[0117] Multiple light-emitting devices 14 are located on one side of the array substrate 10, and the multiple light-emitting devices 14 include multiple first light-emitting devices, multiple second light-emitting devices, and multiple third light-emitting devices. The first light-emitting devices are arranged corresponding to the first isolation openings, the second light-emitting devices are arranged corresponding to the second isolation openings, and the third light-emitting devices are arranged corresponding to the third isolation openings. In one embodiment, one light-emitting device 14 is arranged corresponding to one isolation opening 13a. For example, the first light-emitting devices are arranged in a one-to-one correspondence with the first isolation openings, the second light-emitting devices are arranged in a one-to-one correspondence with the second isolation openings, and the third light-emitting devices are arranged in a one-to-one correspondence with the third isolation openings. At least a portion of the first light-emitting device is arranged within the corresponding first isolation opening, at least a portion of the second light-emitting device is arranged within the corresponding second isolation opening, and at least a portion of the third light-emitting device is arranged within the corresponding third isolation opening. In another embodiment, multiple light-emitting devices 14 are arranged corresponding to one isolation opening 13a. For example, multiple light-emitting devices 14 emitting the same color are arranged corresponding to one isolation opening 13a.

[0118] The first, second, and third light-emitting devices each emit light of a different color. Each of the first, second, and third light-emitting devices includes a first electrode 141, a light-emitting portion 142, and a second electrode 143, which are stacked. The first electrode 141 is disposed on the array substrate 10. The first pixel defining layer 11 covers the end of the first electrode 141. A first pixel opening 11a is provided on the first pixel defining layer 11, exposing the first electrode 141 through the first pixel opening 11a. The light-emitting portions 142 of the first, second, and third light-emitting devices cover the sidewalls of the first pixel opening 11a of the first pixel defining layer 11 and the side of the first pixel defining layer 11 facing away from the array substrate 10. Each light-emitting portion 142 is located within the first pixel opening 11a and in contact with the first electrode 141.

[0119] The second electrodes 143 of the first light emitting device, the second light emitting device, and the third light emitting device respectively cover the corresponding light emitting portions 142. The second electrodes 143 may be connected to the isolation structure 13 or not.

[0120] The first electrode 141 may be an anode, and the second electrode 143 may be a cathode. The first electrode 141 of each light emitting device 14 may be connected to a pixel circuit through a via hole, so that the pixel circuit drives the light emitting device 14 to emit light.

[0121] The first electrode 141 may include a multilayer structure. For example, the first electrode 141 may include a reflective layer and a pair of conductive oxide layers covering the upper and lower surfaces of the reflective layer, respectively. The reflective layer can be formed using, for example, a metal material with excellent light reflectivity, such as silver. Each conductive oxide layer can be formed using, for example, a transparent conductive oxide such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), or IGZO (Indium Gallium Zinc Oxide). The second electrode 143 may be formed using, for example, a metal material such as a magnesium and silver alloy (MgAg).

[0122] Figure 6This is a schematic diagram of a light-emitting portion 142 according to one embodiment of the present application. The light-emitting portion 142 of at least one of the first, second, and third light-emitting devices includes a hole injection layer (HIL), a hole transport layer (HTL), an electron block layer (EBL), an electroluminescent material layer (EML), a hole block layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL), stacked in a direction away from the array substrate 10 (i.e., the Z direction). The light-emitting portion 142 may include a single EML or a stacked light-emitting structure including multiple EML layers.

[0123] To enable the light-emitting portion 142 to emit light, a pixel voltage is supplied to the first electrode 141 and a common voltage is supplied to the second electrode 143, respectively. This creates a potential difference between the first electrode 141 and the second electrode 143, causing the light-emitting portion 142 disposed therebetween to emit light. In one embodiment, if a potential difference is formed between the first electrode 141 and the second electrode 143 of the first light-emitting device, the light-emitting material layer EML of the light-emitting portion 142 emits blue light. If a potential difference is formed between the first electrode 141 and the second electrode 143 of the second light-emitting device, the light-emitting material layer EML of the light-emitting portion 142 emits green light. If a potential difference is formed between the first electrode 141 and the second electrode 143 of the third light-emitting device, the light-emitting material layer EML of the light-emitting portion 142 emits red light.

[0124] The pixel voltage of the first electrode 141 is provided by the pixel circuit, and the common voltage of the second electrode 143 is provided by the isolation structure 13. Specifically, the second electrode 143 is electrically connected to the auxiliary electrode 12. By providing the common voltage to the auxiliary electrode 12, the common voltage is supplied to the second electrode 143. In other words, the auxiliary electrode 12 has the function of supplying the common voltage to the second electrode 143.

[0125] The plurality of light-emitting devices 14 are disposed in correspondence with the plurality of isolation openings 13a, which can mean that the plurality of light-emitting devices 14 are disposed in a one-to-one correspondence with the plurality of isolation openings 13a. Each pair of stacked first electrodes 141, light-emitting portions 142, and second electrodes 143 constitutes a sub-pixel. At least a portion of each sub-pixel is disposed within the isolation openings 13a, and the area encompassing the isolation openings 13a is also referred to as the light-emitting area.

[0126] It can be understood that when the plurality of light-emitting devices 14 are arranged in correspondence with the plurality of isolation openings 13a, and the plurality of isolation openings 13a are arranged in correspondence with the plurality of electrode overlapping portions 121, then the plurality of light-emitting devices 14 are also arranged in correspondence with the plurality of electrode overlapping portions 121. Therefore, when the plurality of light-emitting devices 14 are arranged in a one-to-one correspondence with the plurality of isolation openings 13a, and the plurality of isolation openings 13a are arranged in a one-to-one correspondence with the plurality of electrode overlapping portions 121, then the plurality of light-emitting devices 14 are also arranged in a one-to-one correspondence with the plurality of electrode overlapping portions 121.

[0127] From the above, it can be seen that along the second direction y, the multiple first grooves 111 are arranged at intervals, and each first groove 111 is arranged on one side of the corresponding first pixel opening 11a. Therefore, when the multiple electrode overlapping portions 121 are arranged one-to-one in the multiple first grooves 111, along the second direction y, the multiple electrode overlapping portions 121 are also arranged at intervals, and each electrode overlapping portion 121 is arranged on one side of the corresponding first pixel opening 11a. Since the multiple isolation openings 13a and the multiple electrode overlapping portions 121 are arranged one-to-one, each electrode overlapping portion 121 is also arranged on one side of the corresponding isolation opening 13a. It can be understood that the light-emitting device 14 is electrically connected to the corresponding electrode overlapping portion 121, that is, the directional overlapping of the light-emitting device 14 is realized.

[0128] In addition, it should be noted that the auxiliary electrode 12 extends from the display area AA to the non-display area NA and is connected to the power signal line. The power signal line can be an ELVSS power line, that is, a power line that provides negative voltage and also a power line that provides common voltage.

[0129] In this embodiment, the first pixel defining layer 11 of the display panel is provided with a plurality of first grooves 111, and a plurality of electrode overlapping portions 121 are correspondingly arranged in the plurality of first grooves 111. Thus, when the light-emitting device 14 is evaporated, the second electrode 143 of the light-emitting device 14 is connected to the electrode overlapping portion 121 by controlling the evaporation angle, thereby achieving directional overlap, which can effectively prevent leakage of the display panel and thereby improve the yield rate of the finished product of the display panel.

[0130] In one embodiment, referring to Figure 5 like Figure 7 As shown, Figure 7 A cross-sectional view of another display panel is provided. The display panel further includes a second pixel defining layer 15 disposed on a side of the first pixel defining layer 11 close to the array substrate 10; a second groove 151 is formed on a side of the second pixel defining layer 15 away from the array substrate 10 ( Figure 7The auxiliary electrode 12 of the display panel further includes a main body portion 122 . The main body portion 122 is disposed on a side of the plurality of electrode overlapping portions 121 close to the array substrate 10 . Specifically, the main body portion 122 can be disposed in the second groove 151 and electrically connected to the plurality of electrode overlapping portions 121 .

[0131] The material of the second pixel defining layer 15 can be the same as or different from that of the first pixel defining layer 11, and this is not limited here. In one example, the second pixel defining layer 15 is made of an inorganic material, such as the first pixel defining layer 11 formed of at least one inorganic insulating material selected from silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON). The thickness of the second pixel defining layer 15 can be greater than that of the first pixel defining layer 11.

[0132] The second pixel defining layer 15 defines a plurality of second pixel openings 15a. The sidewalls of the second pixel defining layer 15 adjacent to the second pixel openings 15a may be inclined or curved. The plurality of second pixel openings 15a are disposed correspondingly to the plurality of first electrodes 141, with at least a portion of the surface of each first electrode 141 exposed through the corresponding second pixel opening 15a. The plurality of second pixel openings 15a and the plurality of first electrodes 141 should be disposed in a one-to-one correspondence with each other.

[0133] It can be understood that the multiple second pixel openings 15a are connected to the multiple first pixel openings 11a in a one-to-one correspondence, and the second pixel defining layer 15 and the first pixel defining layer 11 jointly define the light-emitting area of ​​each sub-pixel, avoiding the diffusion of light-emitting functional materials and color mixing between sub-pixels.

[0134] The plurality of isolation openings 13a are connected to the plurality of second pixel openings 15a in a one-to-one correspondence. The orthographic projections of the second pixel openings 15a and the corresponding isolation openings 13a on the array substrate 10 may be the same or different. Generally speaking, the orthographic projection area of ​​the isolation opening 13a on the array substrate 10 is larger than the orthographic projection area of ​​the second pixel opening 15a connected to the isolation opening 13a on the array substrate 10. The orthographic projections of the second pixel openings 15a of the light-emitting device 14 on the array substrate 10 overlap with the orthographic projections of the isolation openings 13a on the array substrate 10.

[0135] It can be understood that the first pixel opening 11 a and the second pixel opening 15 a together constitute the pixel opening of the light emitting device 14 .

[0136] The orthographic projection of the second grooves 151 defined in the second pixel defining layer 15 onto the array substrate 10 forms a grid. Therefore, the orthographic projection of the main body 122 disposed within the second grooves 151 also forms a grid on the array substrate 10. The main body 122 connects to the corresponding electrode bonding portions 121 of each light-emitting device 14. The main body 122 is then connected to the ELVSS power line, making the auxiliary electrode 12 a common electrode.

[0137] The side wall of the second groove 151 can be a slope or a curved surface, so that when preparing the main body 122, the main body 122 is not prone to breakage, ensuring the power supply stability of the auxiliary electrode 12, thereby improving the finished product yield of the display panel; it can also be a vertical surface relative to the plane where the array substrate 11 is located, which is not limited here.

[0138] The second groove 151 may be a groove that penetrates the second pixel defining layer 15 along the thickness direction of the array substrate 10, or may be a groove that does not penetrate the second pixel defining layer 15 along the thickness direction of the array substrate 10. Optionally, a structure in which the second groove 151 does not penetrate the second pixel defining layer 15 is adopted. In this way, the main body 122 in the second groove is prevented from being connected to the first electrode 141.

[0139] In the case where the first groove 111 is a groove that penetrates the first pixel defining layer 11 along the thickness direction of the array substrate 10, in order to achieve electrical connection between the main body 122 and the multiple electrode overlapping portions 121, the second groove 151 can be connected to the multiple first grooves 111. In the case where the first groove 111 is a groove that does not penetrate the first pixel defining layer 11 along the thickness direction of the array substrate 10, a via hole can be provided on the first pixel defining layer 11 between the second groove 151 and each first groove 111 to achieve electrical connection between the main body 122 and the multiple electrode overlapping portions 121. Optionally, the first groove 111 is selected to be a groove that penetrates the first pixel defining layer 11 along the thickness direction of the array substrate 10, and the second groove 151 is connected to the multiple first grooves 111, so that the manufacturing process of the auxiliary electrode 12 can be reduced.

[0140] The main body 122 is disposed in the second groove 151. The thickness of the main body 122 can be equal to the depth of the second groove 151 (i.e., the main body 122 completely fills the second groove 151). The thickness of the main body 122 can also be greater than the depth of the second groove 151 (i.e., the main body 122 fills the second groove 151 and protrudes from the second groove 151). The thickness of the main body 122 can also be less than the depth of the second groove 151 (i.e., the main body 122 does not fill the second groove 151). This is not limited here. It is understood that when the thickness of the main body 122 can be less than the depth of the second groove 151, a portion of the electrode overlapping portion 121 can be located in the second groove 151 to achieve electrical connection between the electrode overlapping portion 121 and the main body 122.

[0141] The material of the main body 122 may be the same as or different from the material of the electrode overlapping portion 121, and is not limited here. The material of the main body 122 includes a metal material, such as aluminum, an aluminum alloy, titanium, copper, or a combination thereof. The aluminum alloy may include at least one of aluminum-neodymium alloy (AlNd), aluminum-yttrium alloy (AlY), or aluminum-silicon alloy (AlSi).

[0142] The positional relationship between the main body 122 and the isolation structure can be such that the orthographic projection of the isolation structure 13 on the array substrate 10 covers the orthographic projection of the main body 122 on the array substrate 10. The positional relationship between the main body 122 and each first electrode 141 can be such that the orthographic projection of the main body 122 on the array substrate 10 at least partially overlaps with the orthographic projection of each first electrode 141 on the array substrate 10.

[0143] The main body 122 extends from the display area AA to the non-display area NA and is connected to the power signal line to provide a power signal to the multiple electrode overlapping parts 121. The power signal line can be an ELVSS power line, that is, a power line that provides negative voltage and also a power line that provides a common voltage. Therefore, by providing a common voltage to the main body 122, the common voltage can be supplied to the second electrode 143.

[0144] In this embodiment, the auxiliary electrode 12 further includes a main body portion 122 electrically connected to the plurality of electrode overlapping portions 121 , so that the auxiliary electrode 12 serves as a common electrode to achieve simultaneous control of the second electrodes 143 of the plurality of light-emitting devices 14 .

[0145] In one embodiment, referring to Figure 7 The isolation structure 13 includes multiple film layers, and the material of the film layer on the side of the isolation structure 13 close to the array substrate 10 includes an insulating material. In this way, in addition to controlling the evaporation angle in the second direction y so that the light-emitting portion 142 of the light-emitting device 14 cannot be connected to the electrode overlapping portion 121, in other directions, because the film layer on the side of the isolation structure 13 close to the array substrate 10 includes an insulating material, it is not necessary to control the evaporation angle, thereby simplifying the source design of the evaporation machine and greatly improving the material utilization rate.

[0146] In one embodiment, the isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 stacked in a direction away from the array substrate 10, and the orthographic projection of the second isolation portion 132 on the array substrate 10 covers the orthographic projection of the first isolation portion 131 on the array substrate 10, thereby realizing an isolation structure 13 with a bottom cut structure.

[0147] The material of the second isolation portion 132 may include at least one of titanium, titanium nitride, molybdenum, tungsten, a molybdenum-tungsten alloy, or a molybdenum-niobium alloy. The material of the first isolation portion 131 may include an inorganic insulating material, for example, the first isolation portion 131 may be formed using at least one of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON).

[0148] The positional relationship between the first isolation portion 131 and the auxiliary electrode 12 can be: the orthographic projection of the first isolation portion 131 on the array substrate 10 does not overlap with the orthographic projections of the multiple electrode overlapping portions 121 on the array substrate 10; the orthographic projection of the first isolation portion 131 on the array substrate 10 at least partially overlaps with the orthographic projection of the main body portion 122 on the array substrate 10.

[0149] The positional relationship between the second isolation portion 132 and the auxiliary electrode 12 can be such that the orthographic projection of the second isolation portion 132 on the array substrate 10 covers the orthographic projections of the plurality of electrode overlapping portions 121 on the array substrate 10. The orthographic projection of the second isolation portion 132 on the array substrate 10 covers the orthographic projection of the main portion 122 on the array substrate 10.

[0150] above Figure 7 A cross-sectional view of the display panel in the second direction y is provided, and a cross-sectional view of the display panel in the first direction x is provided. Figure 8 As shown, the first direction x is a direction intersecting with the second direction y. For example, the first direction x is the direction in which the nozzles are arranged (the nozzle direction). It should be noted that in the first direction x, the second electrode 143 of each light-emitting device 14 may cover at least a portion of the sidewalls of the first isolation portion 131, or may not cover the sidewalls of the first isolation portion 131. In the second direction y, the second electrode 143 of each light-emitting device 14 may cover at least a portion of the sidewalls of the first isolation portion 131, or may not cover the sidewalls of the first isolation portion 131.

[0151] based on Figure 7 and Figure 8 , the perspective view of the above display panel is as follows Figure 9 As shown, it should be noted that Figure 9 The arrangement of the neutron pixels is only an example.

[0152] In one embodiment, as described above, the orthographic projection of the main body portion 122 on the array substrate 10 is in a grid shape. Therefore, the main body portion 122 has a plurality of grids 122a. Since the orthographic projection of the isolation structure 13 on the array substrate 10 overlaps the orthographic projection of the main body portion 122 on the array substrate 10, the plurality of grids 122a of the main body portion 122 and the plurality of isolation openings 13a of the isolation structure 13 are arranged correspondingly. To ensure that each second electrode 143 overlaps with the corresponding electrode overlapping portion 121 in the second direction y, the distance between two opposing sides of the grid 122a along the first direction x is greater than the distance between two opposing sides of the isolation opening 13a. The first distance L1 refers to the distance between two opposing sides of the grid 122a along the first direction, and the second distance L2 refers to the distance between two opposing sides of the isolation opening 13a along the first direction.

[0153] Along the first direction x, the length of the electrode overlapping portion 121 is a first length H1, and the distance between the two opposite sides of the isolation opening 13a corresponding to the electrode overlapping portion 121 is a second distance L2. The first length H1 is greater than or equal to the second distance L2. In this way, the electrode overlapping portion 121 can better overlap with the corresponding second electrode 143.

[0154] It should be noted that, in this embodiment, the two opposite sides of the isolation opening 13a refer to the two opposite sides of the isolation opening 13a formed by the first isolation portion 131, or may refer to the two opposite sides of the isolation opening 13a formed by the second isolation portion 132. In other words, the second distance L2 may be the distance L21 between the two opposite sides of the isolation opening 13a formed by the first isolation portion 131, or the distance L22 between the two opposite sides of the isolation opening 13a formed by the second isolation portion 132.

[0155] Among them, the boundary of the isolation opening 13a formed by the first isolation part 131 can specifically be the boundary of the isolation opening 13a formed by the first isolation part 131 near the bottom of the array substrate 10; the boundary of the isolation opening 13a formed by the second isolation part 132 can specifically be the boundary of the isolation opening 13a formed by the second isolation part 132 near the bottom of the array substrate 10.

[0156] The best way is to Figure 10A As shown, the first distance L1 is greater than the distance L21 between the two opposite sides of the boundary of the isolation opening 13a formed by the first isolation portion 131; Figure 10B As shown, the first length H1 is greater than or equal to a distance L22 between two opposite sides of the boundary of the isolation opening 13 a formed by the second isolation portion 132 .

[0157] In one embodiment, Figure 11 and Figure 12 As shown, Figure 11Another cross-sectional view of the display panel in the second direction is provided. Figure 12 Another cross-sectional view of a display panel in a first direction is provided. The display panel 1 further includes a first encapsulation layer, which includes a plurality of encapsulation portions 16. The encapsulation portions 16 are located on the side of the second electrode 143 facing away from the array substrate 10 and extend through the sidewall of the isolation structure 13 to the side of the isolation structure 13 facing away from the array substrate 10. The plurality of encapsulation portions 16 include a plurality of first encapsulation portions corresponding to the plurality of first light-emitting devices, a plurality of second encapsulation portions corresponding to the plurality of second light-emitting devices, and a plurality of third encapsulation portions corresponding to the plurality of third light-emitting devices. The first encapsulation portion is provided on the side of the corresponding first light-emitting device facing away from the array substrate 10, the second encapsulation portion is provided on the side of the corresponding second light-emitting device facing away from the array substrate 10, and the third encapsulation portion is provided on the side of the corresponding third light-emitting device facing away from the array substrate 10.

[0158] Optionally, encapsulation portion 16 may be a single inorganic film layer or multiple inorganic film layers, where the inorganic film layer may be a silicon oxide layer, a silicon nitride layer, or the like. Encapsulation portion 16 may also be a mixture of organic and inorganic film layers. Encapsulation portion 16 can protect the sub-pixels from corrosion by water vapor.

[0159] The display panel 1 also includes a second encapsulation layer and a third encapsulation layer. The second encapsulation layer covers the isolation structure 13 and the encapsulation portion 16, and the third encapsulation layer covers the second encapsulation layer. The third encapsulation layer is an inorganic material. The materials of the first and third encapsulation layers include at least one of silicon nitride (SiN), silicon oxide (SiO), and silicon oxynitride (SiON). The second encapsulation layer is an organic insulating material, such as epoxy resin, acrylic resin, or other resin material. The second and third encapsulation layers are continuously disposed at least throughout the display area AA, with portions also disposed within the border area NA.

[0160] The display panel 1 may further include at least one film layer including a touch layer, a polarizer, a color filter substrate, a protective cover plate, etc. The film layer may also be bonded to the display panel via an adhesive layer such as OCA (Optical Clear Adhesive).

[0161] In one embodiment, referring to Figures 1-12 , the present application also provides another display panel, the display panel 1 comprising:

[0162] an array substrate 10;

[0163] The second pixel defining layer 15 is disposed on one side of the array substrate 10 . A second groove 151 is formed on a side of the second pixel defining layer 15 away from the array substrate 10 .

[0164] The first pixel defining layer 11 is disposed on a side of the second pixel defining layer 15 away from the array substrate 10 ; the first pixel defining layer 11 defines a plurality of first grooves 111 ;

[0165] The auxiliary electrode includes a main body 122 and a plurality of electrode overlapping portions 121. The main body 122 is disposed in the second groove 151. The plurality of electrode overlapping portions 121 are correspondingly disposed in the plurality of first grooves 111. The main body 122 is electrically connected to the plurality of electrode overlapping portions 121.

[0166] The isolation structure 13 is disposed on a side of the first pixel defining layer 11 away from the array substrate 10 and defines a plurality of isolation openings 13 a ; the plurality of isolation openings 13 a are disposed corresponding to the plurality of electrode overlapping portions 121 ;

[0167] A plurality of light-emitting devices 14 are arranged on one side of the array substrate 10; the plurality of light-emitting devices 14 are arranged corresponding to the plurality of isolation openings 13a; at least part of the light-emitting devices 14 is arranged in the corresponding isolation openings 13a; the light-emitting devices 14 include a first electrode 141, a light-emitting portion 142 and a second electrode 143 stacked along a side away from the array substrate 10; the second electrode 143 is electrically connected to the corresponding electrode overlapping portion 121.

[0168] In one embodiment, the orthographic projection of the main body portion 122 on the array substrate 10 is in a grid shape;

[0169] Optionally, the second groove 151 is in communication with the plurality of first grooves 111 ;

[0170] Optionally, the orthographic projection of the second groove 151 on the array substrate 10 is in a grid shape.

[0171] In one embodiment, the orthographic projection of the isolation structure 13 on the array substrate 10 covers the orthographic projection of the main body 122 on the array substrate 10 ;

[0172] Optionally, the orthographic projection of the main body 122 on the array substrate 10 at least partially overlaps with the orthographic projection of each first electrode 141 on the array substrate 10 .

[0173] In one embodiment, the isolation structure 13 includes multiple film layers, and the material of the film layer on the side of the isolation structure 13 close to the array substrate 10 includes an insulating material;

[0174] Optionally, the isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 stacked in a direction away from the array substrate 10 , and an orthographic projection of the second isolation portion 132 on the array substrate 10 covers an orthographic projection of the first isolation portion 131 on the array substrate 10 ;

[0175] Optionally, the material of the second isolation portion 132 includes titanium or molybdenum; and the material of the first isolation portion 131 includes an inorganic insulating material.

[0176] In one embodiment, the orthographic projection of the first isolation portion 131 on the array substrate 10 does not overlap with the orthographic projections of the plurality of electrode overlapping portions 121 on the array substrate 10 ;

[0177] The orthographic projection of the second isolation portion 132 on the array substrate 10 covers the orthographic projections of the plurality of electrode overlapping portions 121 on the array substrate 10 .

[0178] In one embodiment, the orthographic projection of the first isolation portion 131 on the array substrate 10 overlaps at least partially with the orthographic projection of the main body portion 122 on the array substrate 10 ;

[0179] The orthographic projection of the second isolation portion 132 on the array substrate 10 covers the orthographic projection of the main body portion 122 on the array substrate 10 .

[0180] In one embodiment, the plurality of grids 122a of the main body 122 are arranged corresponding to the plurality of isolation openings 13a. Along the first direction, the distance between two opposite sides of the grids 122a of the main body 122 is a first distance L1, and the distance between two opposite sides of the isolation openings 13a is a second distance L2. The first distance L1 is greater than the second distance L2.

[0181] Optionally, each electrode overlapping portion 121 is provided on one side of the corresponding isolation opening 13a;

[0182] Optionally, each electrode overlapping portion 121 is disposed on one of two opposite sides of the corresponding isolation opening 13a along the second direction y, where the second direction y intersects the first direction x and is parallel to the extending direction of the scanning lines in the array substrate 10;

[0183] Optionally, the display panel 1 includes a display area and a non-display area surrounding the display area, and the main body 122 extends from the display area to the non-display area and is connected to the power signal line.

[0184] In one embodiment, along the first direction, the length of the electrode overlapping portion 121 is a first length H1, the distance between two opposite sides of the isolation opening 13a corresponding to the electrode overlapping portion 121 is a second distance L2, and the first length H1 is greater than or equal to the second distance L2.

[0185] The display panel in this embodiment has been described in detail above and will not be repeated here.

[0186] In one embodiment, Figure 13 As shown, the present application also provides a method for preparing a display panel, which can be used to prepare the display panel in the above-mentioned display panel embodiment.

[0187] The method for preparing the display panel includes:

[0188] Step S801 : providing an array substrate 10 .

[0189] In step S802 , a first pixel defining layer 11 is formed on one side of the array substrate 10 , and a plurality of first grooves 111 are opened in the first pixel defining layer 11 .

[0190] In step S803 , a first metal layer M1 is formed on a side of the first pixel defining layer 11 away from the array substrate 10 , and the first metal layer M1 is patterned to obtain a plurality of electrode overlapping portions 121 of the auxiliary electrode 12 ; the plurality of electrode overlapping portions 121 are correspondingly disposed in the plurality of first grooves 111 .

[0191] In step S804 , an isolation structure 13 is formed on a side of the first pixel defining layer 11 away from the array substrate 10 . The isolation structure 13 has a plurality of isolation openings 13 a . The plurality of isolation openings 13 a are correspondingly disposed to the plurality of electrode overlapping portions 121 .

[0192] In step S805, a plurality of light-emitting devices 14 are formed on one side of the array substrate 10; the plurality of light-emitting devices 14 are arranged corresponding to the plurality of isolation openings 13a; the light-emitting devices 14 include a first electrode 141, a light-emitting portion 142 and a second electrode 143 stacked along a side away from the array substrate 10; the second electrode 143 is electrically connected to the corresponding electrode overlapping portion 121.

[0193] Optionally, before forming the first pixel defining layer 11 on one side of the array substrate 10, the preparation method further includes: forming a second pixel defining layer 15 on one side of the array substrate 10; and defining a second groove 151 in the second pixel defining layer 15; forming a second metal layer M2 on a side of the second pixel defining layer 15 away from the array substrate 10, and patterning the second metal layer M2 to obtain a main body portion 122 of the auxiliary electrode 12; the main body portion is located in the second groove 151; wherein the main body portion 122 is electrically connected to the plurality of electrode overlapping portions 121;

[0194] Correspondingly, forming the first pixel defining layer 11 on one side of the array substrate 10 includes forming the first pixel defining layer 11 on a side of the second pixel defining layer 15 away from the array substrate 10 .

[0195] Optionally, before forming the second pixel defining layer 15 on one side of the array substrate 10, the method further includes: forming a first electrode layer M3 on one side of the array substrate 10, and patterning the first electrode layer M3 to obtain a plurality of first electrodes 141. The first electrode layer M3 may be formed on the planarization layer of the array substrate 10.

[0196] Optionally, an isolation structure 13 is formed on the side of the first pixel defining layer 11 away from the array substrate 10, including: forming a first isolation portion 131 on the side of the first pixel defining layer 11 away from the array substrate 10; forming a second isolation portion 132 on the side of the first isolation portion 131 away from the array substrate 10; and graphically processing the first isolation portion 131 and the second isolation portion 132 to obtain the isolation structure 13.

[0197] In summary, the principle diagram of the above preparation method is as follows Figure 14 and Figure 15 As shown, Figure 14 is a cross-sectional view during the preparation process in the second direction, Figure 15 It is a cross-sectional view during the preparation process in the first direction.

[0198] After forming the isolation structure 13 , the first pixel defining layer 11 and the second pixel defining layer 15 are etched to form a plurality of pixel openings. It can be understood that the pixel openings include a first pixel opening 11 a and a second pixel opening 15 a .

[0199] In one embodiment, the plurality of isolation openings 13a include a plurality of first isolation openings, a plurality of second isolation openings, and a plurality of third isolation openings; the plurality of light-emitting devices 14 include a first light-emitting device, a second light-emitting device, and a third light-emitting device; and the plurality of light-emitting devices 14 are formed on one side of the array substrate 10, including:

[0200] Step S8051 , manufacturing a film layer of a first light-emitting device, wherein the film layer of the first light-emitting device includes a light-emitting portion of the first light-emitting device and a second electrode layer.

[0201] Step S8052: Fabricate a first encapsulation layer for the first light-emitting device. Since the film layer and the first encapsulation layer of the first light-emitting device are fabricated as a single layer, the film layer and the first encapsulation layer of the first light-emitting device are located at the positions of the plurality of first isolation openings, the plurality of second isolation openings, and the plurality of third isolation openings.

[0202] In step S8053, the film layer of the first light-emitting device and the first packaging layer of the first light-emitting device at the positions of the multiple second isolation openings and the multiple third isolation openings are etched away, thereby forming the light-emitting portion 142 and the second electrode 143 of the first light-emitting device and the first packaging portion of the first light-emitting device only at the positions of the multiple first isolation openings.

[0203] Step S8054: manufacturing a film layer of the second light-emitting device, wherein the film layer of the second light-emitting device includes a light-emitting portion of the second light-emitting device and a second electrode layer.

[0204] Step S8055: Fabricate the first encapsulation layer of the second light-emitting device. Since the film layer of the second light-emitting device and the first encapsulation layer of the second light-emitting device are both fabricated as a single layer, the film layer of the second light-emitting device and the first encapsulation layer of the second light-emitting device are located at the positions of the plurality of first isolation openings, the plurality of second isolation openings, and the plurality of third isolation openings.

[0205] In step S8056, the film layer of the second light-emitting device and the first packaging layer of the second light-emitting device at the positions of the multiple first isolation openings and the multiple third isolation openings are etched away, thereby forming the light-emitting portion 142 and the second electrode 143 of the second light-emitting device and the first packaging portion of the second light-emitting device only at the positions of the multiple second isolation openings.

[0206] Step S8057 , manufacturing a film layer of a third light-emitting device, wherein the film layer of the third light-emitting device includes the light-emitting portion of the second light-emitting device and the second electrode layer.

[0207] Step S8058: Fabricate the first encapsulation layer of the third light-emitting device. Since the film layer and the first encapsulation layer of the third light-emitting device are both fabricated as a single layer, the film layer and the first encapsulation layer of the third light-emitting device are located at the locations of the plurality of first isolation openings, the plurality of second isolation openings, and the plurality of third isolation openings.

[0208] In step S8059, the film layer of the third light-emitting device and the first packaging layer of the third light-emitting device at the positions of the multiple first isolation openings and the multiple second isolation openings are etched away, thereby forming the light-emitting portion 142 and the second electrode 143 of the third light-emitting device and the first packaging portion of the third light-emitting device only at the positions of the multiple third isolation openings.

[0209] In one embodiment, an embodiment of the present application provides a display device, which includes the display panel described in any of the above display panel embodiments.

[0210] The display device can be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a video camera, a game console, a watch, a clock, a calculator, a television monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a camera view display (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc. Since the display device includes the display panel of the present application, the reliability of the electronic device is higher.

[0211] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0212] In the description of this application, it should be noted that the terms "center", "vertical", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0213] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0214] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A display panel, characterized in that: The display panel includes: an array substrate; A first pixel defining layer is provided on one side of the array substrate; the first pixel defining layer is provided with a plurality of first grooves; an auxiliary electrode, comprising a plurality of electrode overlapping portions, wherein the plurality of electrode overlapping portions are correspondingly disposed in the plurality of first grooves; an isolation structure, disposed on a side of the first pixel defining layer away from the array substrate, and defining a plurality of isolation openings; the plurality of isolation openings are disposed corresponding to the plurality of electrode overlapping portions; A plurality of light-emitting devices are arranged on one side of the array substrate; the plurality of light-emitting devices are arranged corresponding to the plurality of isolation openings; at least part of the light-emitting devices is arranged in the corresponding isolation openings; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked along a side away from the array substrate; the second electrode is electrically connected to the corresponding electrode overlapping portion.

2. The display panel according to claim 1, wherein: The auxiliary electrode further includes a main body portion, which is disposed on a side of the plurality of electrode overlapping portions close to the array substrate; and the main body portion is electrically connected to the plurality of electrode overlapping portions.

3. The display panel according to claim 2, wherein: The orthographic projection of the main body on the array substrate is in a grid shape.

4. The display panel according to claim 2, wherein: The orthographic projection of the isolation structure on the array substrate covers the orthographic projection of the main body on the array substrate.

5. The display panel according to claim 2, wherein: An orthographic projection of the main body on the array substrate overlaps at least partially with an orthographic projection of each of the first electrodes on the array substrate.

6. The display panel according to claim 2, wherein: The display panel further includes a second pixel defining layer disposed on a side of the first pixel defining layer close to the array substrate; A second groove is formed on a side of the second pixel defining layer away from the array substrate, and the main body is disposed in the second groove.

7. The display panel according to claim 6, wherein: The second groove is in communication with the plurality of first grooves.

8. The display panel according to claim 2, wherein: The isolation structure includes a plurality of film layers, and the material of the film layer on the side of the isolation structure close to the array substrate includes an insulating material.

9. The display panel according to claim 8, wherein: The isolation structure includes a first isolation portion and a second isolation portion stacked in a direction away from the array substrate, wherein an orthographic projection of the second isolation portion on the array substrate covers an orthographic projection of the first isolation portion on the array substrate.

10. The display panel according to claim 9, wherein: The material of the second isolation portion includes titanium or molybdenum; the material of the first isolation portion includes an inorganic insulating material.

11. The display panel according to claim 9, wherein The orthographic projection of the first isolation portion on the array substrate does not overlap with the orthographic projections of the plurality of electrode overlapping portions on the array substrate; The orthographic projection of the second isolation portion on the array substrate covers the orthographic projections of the plurality of electrode overlapping portions on the array substrate.

12. The display panel according to claim 9, wherein: The orthographic projection of the first isolation portion on the array substrate overlaps at least partially with the orthographic projection of the main body portion on the array substrate; The orthographic projection of the second isolation portion on the array substrate covers the orthographic projection of the main body portion on the array substrate.

13. The display panel according to claim 2, wherein: The plurality of grids of the main body are arranged corresponding to the plurality of isolation openings; Along the first direction, the distance between two opposite sides of the grid of the main body is a first distance L1, and the distance between two opposite sides of the isolation opening is a second distance L2. The first distance L1 is greater than the second distance L2.

14. The display panel according to claim 1, wherein Each of the electrode overlapping portions is arranged on one side of the corresponding isolation opening.

15. The display panel according to claim 14, wherein: Each of the electrode overlapping portions is disposed on one of two sides of the corresponding isolation opening that are opposite to each other along a second direction, and the second direction is parallel to an extending direction of the scanning lines in the array substrate.

16. The display panel according to claim 14, wherein: Along the first direction, the length of the electrode overlapping portion is a first length H1, and the distance between two opposite sides of the isolation opening corresponding to the electrode overlapping portion is a second distance L2. The first length H1 is greater than or equal to the second distance L2.

17. The display panel according to claim 1, wherein: The display panel includes a display area and a non-display area surrounding the display area. The auxiliary electrode extends from the display area to the non-display area and is connected to a power signal line.

18. A method for preparing a display panel, characterized in that: The preparation method comprises: providing an array substrate; forming a first pixel defining layer on one side of the array substrate, and defining a plurality of first grooves in the first pixel defining layer; forming a first metal layer on a side of the first pixel defining layer away from the array substrate, and patterning the first metal layer to obtain a plurality of electrode overlapping portions of the auxiliary electrode; the plurality of electrode overlapping portions are correspondingly disposed in the plurality of first grooves; An isolation structure is formed on a side of the first pixel defining layer away from the array substrate, wherein the isolation structure is provided with a plurality of isolation openings; the plurality of isolation openings are provided corresponding to the plurality of electrode overlapping portions; A plurality of light-emitting devices are formed on one side of the array substrate; the plurality of light-emitting devices are arranged corresponding to the plurality of isolation openings; the light-emitting devices include a first electrode, a light-emitting portion, and a second electrode stacked along a side away from the array substrate; the second electrode is electrically connected to the corresponding electrode overlapping portion.

19. The preparation method according to claim 18, characterized in that Before forming the first pixel defining layer on one side of the array substrate, the preparation method further includes: forming a second pixel defining layer on one side of the array substrate; and forming a second groove in the second pixel defining layer; forming a second metal layer on a side of the second pixel defining layer away from the array substrate, and patterning the second metal layer to obtain a main body portion of the auxiliary electrode; the main body portion is located in the second groove; wherein the main body portion is electrically connected to the plurality of electrode overlapping portions; Correspondingly, forming a first pixel defining layer on one side of the array substrate includes: The first pixel defining layer is formed on a side of the second pixel defining layer away from the array substrate.

20. A display device, characterized in that: The device comprises a display panel according to any one of claims 1 to 17.

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