Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device. The display panel comprises a substrate; each light-emitting device comprises a light-emitting functional layer and a first electrode which are sequentially arranged in a stacked mode in the direction away from the substrate, and the light-emitting functional layer of each light-emitting device has a first orthographic projection on the substrate; the first packaging layer is provided with a plurality of via holes, and the via holes have second orthographic projections on the substrate; the first part of the auxiliary electrode is arranged on the side, away from the substrate, of the first packaging layer, and the connecting part is arranged in the corresponding via hole and electrically connected with the corresponding first electrode; wherein the edges of the orthographic projection of the first part on the substrate comprise a first edge facing the corresponding first orthographic projection and a second edge deviating from the corresponding first orthographic projection, and the distance between the second orthographic projection and the corresponding first edge is larger than the distance between the second orthographic projection and the corresponding second edge. The risk that the first electrode layer and the light-emitting functional layer are eroded by water and oxygen is reduced, and the use performance of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the performance of current OLED display products needs to be improved. Some display products improve their performance by introducing auxiliary electrode technology. Patents CN118742138A, PCT / CN2024 / 107011, and 202411175069.8 record relevant content of auxiliary electrode technology for reference. Summary of the invention

[0004] Embodiments of the present application provide a display panel and a display device, aiming to improve the performance of the display panel.

[0005] An embodiment of one aspect of the present application provides a display panel, comprising: a substrate; a plurality of light-emitting devices, the light-emitting devices comprising a light-emitting functional layer and a first electrode stacked in sequence in a direction away from the substrate, the light-emitting functional layer of the light-emitting device having a first orthographic projection on the substrate; a first encapsulation layer, arranged on a side of the plurality of light-emitting devices away from the substrate, the first encapsulation layer being provided with a plurality of vias, the vias having a second orthographic projection on the substrate; at least one auxiliary electrode, comprising a plurality of first parts and a plurality of connecting parts connected to each other, the first part being arranged on a side of the first encapsulation layer away from the substrate, the connecting part being arranged in the corresponding via hole and electrically connected to the corresponding first electrode; wherein the edge of the orthographic projection of the first part on the substrate comprises a first edge facing the corresponding first orthographic projection and a second edge away from the corresponding first orthographic projection, and the distance between the second orthographic projection and the corresponding first edge is greater than the distance between the second orthographic projection and the corresponding second edge.

[0006] According to any embodiment described in one aspect of the present application, the shortest distance between the second orthographic projection and the corresponding first edge is greater than the shortest distance between the second orthographic projection and the corresponding second edge.

[0007] According to any embodiment described in one aspect of the present application, the orthographic projection shape of the first part on the substrate is a quadrilateral, the first edge includes a first edge and a second edge connected, the second edge includes a third edge and a fourth edge connected, the third edge is connected to the first edge, and the fourth edge is connected to the second edge; preferably, the orthographic projection shape of the first part on the substrate is a rectangle; preferably, the orthographic projection shape of the connecting portion on the substrate is a rectangle; preferably, the difference between the distance between the second orthographic projection and the corresponding first edge and the distance between the second orthographic projection and the corresponding second edge is not less than 0.5μm; preferably, the difference between the shortest distance between the second orthographic projection and the corresponding first edge and the shortest distance between the second orthographic projection and the corresponding second edge is not less than 0.5μm.

[0008] According to any embodiment described in one aspect of the present application, the at least one auxiliary electrode includes a plurality of auxiliary electrodes, and the auxiliary electrode also includes a second part arranged on the side of the first encapsulation layer away from the substrate, and the second part extends along a first direction parallel to the plane of the substrate and connects the plurality of first parts arranged along the first direction.

[0009] According to any embodiment described in one aspect of the present application, the at least one auxiliary electrode includes an auxiliary electrode, and the auxiliary electrode also includes a second part connected to the multiple first parts, the second part is arranged on the side of the first encapsulation layer away from the substrate, and extends along the first direction and the second direction parallel to the plane where the substrate is located, and the first direction and the second direction intersect; preferably, the second part includes a plurality of first sub-parts extending along the first direction and a second sub-part extending along the second direction, the first sub-part connects a plurality of first parts arranged along the first direction, the first sub-part has relative first and second ends in the first direction, and the second sub-part connects a plurality of first ends, or the second sub-part connects a plurality of second ends; preferably, the second part includes a plurality of first sub-parts extending along the first direction and a plurality of second sub-parts extending along the second direction, the first sub-part connects a plurality of first parts arranged along the first direction, the first sub-part has relative first and second ends in the first direction, a plurality of first ends are connected by the same second sub-part, and a plurality of second ends are connected by the same second sub-part.

[0010] According to any embodiment described in one aspect of the present application, the edge of the orthographic projection of the side of the connecting portion away from the substrate on the substrate includes a third edge facing the corresponding first orthographic projection and a fourth edge facing away from the corresponding first orthographic projection, the distance between the first edge and the third edge is a first distance, and the distance between the second edge and the fourth edge is a second distance; the edge of the orthographic projection of the side of the connecting portion facing the substrate on the substrate includes a fifth edge facing the corresponding first orthographic projection and a sixth edge away from the corresponding first orthographic projection, the distance between the fifth edge and the third edge is a third distance, and the distance between the sixth edge and the fourth edge is a fourth distance; the sum of the first distance and the third distance is greater than the sum of the second distance and the fourth distance; preferably, the shortest distance between the first edge and the third edge is the first distance, the shortest distance between the second edge and the fourth edge is the second distance, the shortest distance between the fifth edge and the third edge is the third distance, and the shortest distance between the sixth edge and the fourth edge is the fourth distance.

[0011] According to any one of the embodiments described in one aspect of the present application, it further includes: a pixel definition layer, which is arranged on one side of the substrate, the pixel definition layer includes a plurality of pixel openings, and a portion of the light-emitting device is located in the corresponding pixel openings; wherein the orthographic projection of the at least one auxiliary electrode on the substrate and the orthographic projection of the plurality of pixel openings on the substrate do not overlap; preferably, the orthographic projection of the at least one auxiliary electrode on the substrate is located within the orthographic projection of the pixel definition layer on the substrate away from the substrate. Preferably, the display panel further comprises: an isolation structure, which is arranged on the side of the pixel definition layer away from the substrate, the isolation structure comprising a plurality of isolation openings, the isolation openings being connected to the corresponding pixel openings, and part of the light-emitting device being located in the corresponding isolation opening; preferably, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate; preferably, the first electrode is located in the corresponding isolation opening; preferably, the isolation structure comprises a conductive material, the first electrode and the isolation structure are electrically connected, or the isolation structure comprises an insulating material; preferably, the first encapsulation layer comprises a plurality of first encapsulation parts, the first encapsulation parts are arranged on the side of the corresponding light-emitting device away from the substrate, and extend from the side wall of the isolation structure to the side of the isolation structure away from the substrate; preferably, the via hole is arranged on the corresponding first encapsulation part, and the projection of the bottom wall of the via hole on the substrate does not overlap with the projection of the side of the isolation structure away from the substrate on the substrate; preferably, the bottom wall of the via hole is arranged close to the substrate on the side of the isolation structure away from the substrate.

[0012] According to any embodiment described in one aspect of the present application, the first orthographic projection includes an avoidance gap, and a portion of the orthographic projection of the at least one auxiliary electrode on the substrate is located within the avoidance gap.

[0013] According to any embodiment described in one aspect of the present application, it also includes: a second encapsulation layer, which is arranged on the side of the at least one auxiliary electrode away from the substrate and on the side of the first encapsulation layer exposed by the at least one auxiliary electrode away from the substrate, and the second encapsulation layer includes an organic material; preferably, the display panel also includes a third encapsulation layer arranged on the side of the second encapsulation layer away from the substrate, and the third encapsulation layer includes an inorganic material; preferably, the first encapsulation layer includes an inorganic material; preferably, the material of the first encapsulation layer is the same as the material of the third encapsulation layer; preferably, the first electrodes of each of the light-emitting devices are connected in an integrated manner.

[0014] Another aspect of the present application provides a display device, comprising the display panel in any of the above embodiments.

[0015] In the display panel provided in the embodiment of the present application, the display panel provided in the embodiment of the present invention includes a substrate, a light-emitting device, a first electrode, a first packaging layer and an auxiliary electrode. The first part of the auxiliary electrode is electrically connected to the first electrode layer through a connecting part located in the via hole to reduce impedance and ensure the display effect. The distance between the second orthographic projection and the corresponding first edge is greater than the distance between the second orthographic projection and the corresponding second edge. The light-emitting structure increases the path length of water and oxygen entering the via hole from the first edge along the surface of the first part and the connecting part, thereby reducing the risk of the first electrode layer and the light-emitting functional layer being corroded by water and oxygen. The minimum distance between the connecting part and the second edge will be reduced accordingly, thereby improving the impact on the aperture ratio of the display panel and improving the performance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0017] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0018] Figure 2 In one example Figure 1 The local schematic diagram of the P position in the middle;

[0019] Figure 3 In one example Figure 2 Sectional view at AA in the middle;

[0020] Figure 4 is a cross-sectional view of an auxiliary electrode provided in an embodiment of the present application;

[0021] Figure 5 is a top view of an auxiliary electrode provided in an embodiment of the present application;

[0022] Figure 6 In another example Figure 1 The local schematic diagram of the P position in the middle;

[0023] Figure 7 It is a cross-sectional view of a display panel provided in an embodiment of the present application.

[0024] Description of reference numerals:

[0025] 1. Display panel; 100. Substrate;

[0026] 200, light-emitting functional layer; 201, light-emitting material layer;

[0027] 300. a first electrode;

[0028] 400, first packaging;

[0029] 500, auxiliary electrode; 501, first part; 502, connecting part; 503, second part;

[0030] 600, Isolation structure;

[0031] 700, second encapsulation layer;

[0032] 800, third encapsulation layer;

[0033] 900, second electrode layer;

[0034] B10, first edge; B20, second edge; B30, third edge; B40, fourth edge; B50, fifth edge; B60, sixth edge; B1, first side; B2, second side; B3, third side; B4, fourth side; G, via; P, avoidance gap; PDL, pixel definition layer; X, first direction; Y, second direction; Z1, first sub-section; Z2, second sub-section. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0036] In order to better understand this application, Figures 1 to 6 The display panel and the display device according to the embodiments of the present application are described in detail.

[0037] See also Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application; Figure 2 In one example Figure 1 The local schematic diagram of the P position in the middle; Figure 3 In one example Figure 2 Cross-sectional view at AA in the middle.

[0038] The present application provides a display panel 1, comprising: a substrate 100; a plurality of light-emitting devices, the light-emitting devices comprising a light-emitting functional layer 200 and a first electrode 300 sequentially stacked in a direction away from the substrate, the light-emitting functional layer 200 of the light-emitting device having a first orthographic projection T1 on the substrate 100; a light-emitting structure; a first encapsulation layer 400, arranged on a side of the first electrode layer 300 away from the substrate 100, the first encapsulation layer 400 having a plurality of via holes G, the via holes G having a second orthographic projection T2 on the substrate 100; at least one auxiliary electrode 500, comprising a plurality of first electrodes connected to each other; Part 501 and multiple connecting parts 502, the first part 501 is arranged on the side of the first packaging layer 400 away from the substrate 100, the connecting part 502 is arranged in the corresponding via G, and is electrically connected to the corresponding first electrode 300; wherein, the edge of the orthographic projection of the first part 501 on the substrate 100 includes a first edge B10 facing the corresponding first orthographic projection T1 and a second edge B20 away from the corresponding first orthographic projection T1, and the distance between the second orthographic projection T2 and the corresponding first edge B10 is greater than the distance between the second orthographic projection T2 and the corresponding second edge B20.

[0039] Light-emitting structure The display panel 1 provided by the embodiment of the present invention includes a substrate 100, a light-emitting device, a first electrode 300, a first packaging layer 400 and an auxiliary electrode 500. The first part 501 of the auxiliary electrode 500 is electrically connected to the first electrode layer 300 through a connecting part 502 located in the via G to reduce impedance and ensure the display effect. The distance between the second orthographic projection T2 and the corresponding first edge B10 is greater than the distance between the second orthographic projection T2 and the corresponding second edge B20, that is, the path length of water and oxygen entering the via G from the first edge B10 along the surface of the first part 501 and the connecting part 502 is increased, thereby reducing the risk of the first electrode layer 300 and the light-emitting functional layer 200 being corroded by water and oxygen, and the minimum distance between the connecting part 502 and the second edge B20 will be correspondingly reduced, thereby improving the impact on the aperture ratio of the display panel 1 and improving the performance of the display panel 1.

[0040] In this embodiment, according to the different specific shapes and structures of the first part 501, the positions of the first edge B10 and the second edge B20 correspond to different ones. The first edge B10 is a side surface of the first part 501 close to the light-emitting structure. Water and oxygen are more likely to enter the light-emitting structure or the first electrode layer 300 from the first edge B10, along the area between the first part 501 and the first packaging layer 400, close to the connecting portion 502, and through the connecting portion 502 and the area between the first packaging layer 400 where the via G is formed. It can be understood that the greater the distance between the second orthographic projection T2 and the corresponding first edge B10, the longer the path taken by water and oxygen from the first edge B10, along the area between the first part 501 and the first packaging layer 400 to the connecting portion 502, and the less likely it is for water and oxygen to enter the via G, thereby reducing the risk of the light-emitting functional layer 200 and the first electrode layer 300 being corroded by water and oxygen.

[0041] It should be noted that the distance between the second orthographic projection T2 and the corresponding first edge B10 is greater than the distance between the second orthographic projection T2 and the corresponding second edge B20, which means that the corresponding positions of the first edge B10 and the second edge B2 at least one place meet the above conditions. Optionally, the shortest distance between the second orthographic projection T2 and the corresponding first edge B10 is greater than the shortest distance between the second orthographic projection T2 and the corresponding second edge B20, so as to ensure that the distance between the second orthographic projection T2 and any point of the corresponding first edge B10 is greater than the shortest distance between the second orthographic projection T2 and the corresponding second edge B20, so as to increase the path length of water oxygen entering the via G from the first edge B10 along the surface of the first part 501 and the connecting part 502.

[0042] Optionally, there are multiple ways to set the substrate 100. The substrate 100 may include a substrate and a first conductive layer, a second conductive layer, and a third conductive layer that are arranged on one side of the substrate and are stacked. An insulating layer is provided between adjacent conductive layers. Exemplarily, the substrate 100 includes a pixel driving circuit. The pixel driving circuit includes a transistor and a storage capacitor. The transistor includes a channel region, a gate, a source and a drain. The storage capacitor includes a first plate and a second plate. As an example, the gate and the first plate may be located in the first conductive layer, the second plate may be located in the second conductive layer, and the source and the drain may be located in the third conductive layer. Optionally, the substrate 100 may also include a fourth conductive layer, the fourth conductive layer is located on the side of the third conductive layer facing away from the substrate, and the fourth conductive layer may be provided with a connecting signal line.

[0043] Optionally, the display panel 1 further includes a second electrode 900, and each second electrode 900 is located on a side of each light emitting structure facing the substrate 100. The second electrode 900 and the first electrode 300 work together to drive the light emitting structure to emit light. One of the first electrode 300 and the second electrode 900 is an anode, and the other is a cathode. The embodiment of the present application is described by taking the first electrode 300 as a cathode and the second electrode 900 as an anode as an example.

[0044] The material of the first electrode 300 may include one of metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca) or indium (In), and may also be an alloy of the aforementioned metal materials, such as magnesium-silver alloy (Mg / Ag) and lithium-aluminum alloy (Li / Al), but this embodiment does not limit this.

[0045] The material of the second electrode 900 is generally a material with a high work function to improve the hole injection efficiency, and may include gold (Au), platinum (Pt), titanium (Ti), silver (Ag), indium tin oxide (ITO), zinc tin oxide (IZO) or a transparent conductive polymer (such as polyaniline), etc. For example, the second electrode 900 can be made of an ITO-Ag-ITO composite material, without special limitation.

[0046] Optionally, the light-emitting functional layer 200 includes one or more of an electron injection layer, an electron transport layer, a light-emitting material layer 201, a hole blocking layer, an electron blocking layer, a hole transport layer and a hole injection layer. It can be selected according to the specific type of the light-emitting layer, and there is no special limitation. The electron injection layer, the electron transport layer, and the hole blocking layer can be arranged between the second electrode 900 and the light-emitting material layer 201. The electron blocking layer, the hole transport layer and the hole injection layer can be arranged between the first electrode 300 and the light-emitting material layer 301.

[0047] See also Figures 4 to 5In some optional embodiments, the orthographic projection shape of the first portion 501 on the substrate 100 is a quadrilateral, the first edge B10 includes a first side B1 and a second side B2 connected, the second edge B20 includes a third side B3 and a fourth side B4 connected, the third side B3 is connected to the first side B1, and the fourth side B4 is connected to the second side B2.

[0048] In this embodiment, it can be limited that in a direction parallel to the plane where the substrate 100 is located, the distance between the edge of the orthographic projection of the connecting portion 502 on the substrate 100 and the first side B1 is greater than the distance between the edge of the orthographic projection of the connecting portion 502 on the substrate 100 and the fourth side B4 and the fourth side B4, or the distance between the edge of the orthographic projection of the connecting portion 502 on the substrate 100 and the second side B2 and the first side B1 is greater than the distance between the edge of the orthographic projection of the connecting portion 502 on the substrate 100 and the third side B3 and the third side B3, so as to increase the distance between the first edge B10 and the connecting portion 502 and increase the erosion path of water and oxygen.

[0049] Optionally, the orthographic projection of the first portion 501 on the substrate 100 is rectangular, and the first side B1 and the second side B2 are arranged close to the light-emitting structure relative to the third side B3 and the fourth side B4, that is, the light-emitting structure is arranged on one side of the diagonal direction of the first portion 501.

[0050] Of course, the relative position of the light-emitting structure and the first part 501 is not limited to the above form. The relative position of the light-emitting structure and the first part 501 is different, and the specific positions of the corresponding first edge B10 and second edge B20 are also different, which needs to be set according to actual conditions.

[0051] Optionally, along a direction parallel to the plane of the substrate 100, the first edge B10 is arranged close to the light-emitting structure relative to the second edge B20, and the difference between the distance a between the second orthographic projection T2 and the corresponding first edge B10 and the distance b between the second orthographic projection T2 and the corresponding second edge B20 is not less than 0.5 μm.

[0052] Specifically, the relative position of the first part 501 and the via G can be adjusted to adjust the distance a between the second orthographic projection T22 and the corresponding first edge B10 and the difference between the distance b between the second orthographic projection T2 and the corresponding second edge B20, that is, the connecting portion 502 can be adjusted in a direction away from the light-emitting structure to increase the distance a between the second orthographic projection T2 and the corresponding first edge B10 of the light-emitting structure. The inventors have found through experimental research that the difference between the distance a between the second orthographic projection T2 and the corresponding first edge B10 and the distance b between the second orthographic projection T2 and the corresponding second edge B20 is not less than 0.5 μm, so as to achieve a better water-oxygen erosion improvement effect. Optionally, the difference between the distance a between the second orthographic projection T2 and the corresponding first edge B10 and the distance b between the second orthographic projection T2 and the corresponding second edge B20 needs to be greater than or equal to 1 μm.

[0053] Optionally, the difference between the shortest distance between the second orthographic projection T2 and the corresponding first edge B10 and the shortest distance between the second orthographic projection T2 and the corresponding second edge B20 is not less than 0.5 μm. It is ensured that the distance between the second orthographic projection T2 and any point of the corresponding first edge B10 is greater than the difference between the shortest distance between the second orthographic projection T2 and the corresponding second edge B20 is not less than 0.5 μm.

[0054] See also Figure 2 In some optional embodiments, at least one auxiliary electrode includes multiple auxiliary electrodes, and the auxiliary electrode also includes a second part 503 arranged on the side of the first encapsulation layer 400 away from the substrate 100, and the second part 503 extends along a first direction X parallel to the plane where the substrate 100 is located, and connects multiple first parts 501 arranged along the first direction X.

[0055] Considering that the area of ​​the first part 501 is relatively small and the effect of reducing impedance is limited, in this embodiment, a second part 503 extending in the first direction X can also be set to increase the setting area of ​​the auxiliary structure and improve the impedance reduction effect. Optionally, the second parts 503 are electrically connected to each other to facilitate unified signal transmission.

[0056] See also Figure 6 Optionally, at least one auxiliary electrode includes an auxiliary electrode, the auxiliary electrode also includes a second part 503 connected to the multiple first parts 501, the second part 503 is arranged on the side of the first encapsulation layer 400 away from the substrate 100, and extends along a first direction X and a second direction Y parallel to the plane of the substrate 100, and the first direction X and the second direction Y intersect.

[0057] It can be understood that, in this embodiment, the second part 503 extends along the first direction X and the second direction Y respectively, the part of the second part 503 along the first direction X can be connected to the first parts 501, and the part of the second part 503 along the second direction Y can be connected to the part of the second part 503 along the first direction X, so as to facilitate unified signal transmission.

[0058] Optionally, the second part 503 includes a plurality of first sub-parts Z1 extending along the first direction X and a second sub-part Z2 extending along the second direction Y, the first sub-part Z1 connects a plurality of first parts 501 arranged along the first direction X, the first sub-part Z1 has a first end and a second end relative to each other in the first direction X, the second sub-part Z2 connects the plurality of first ends, or the second sub-part Z2 connects the plurality of second ends, so as to connect the first sub-part Z1 and the second sub-part Z2 of the second part 503 as a whole.

[0059] Optionally, the second part includes a plurality of first sub-parts Z1 extending along the first direction X and a plurality of second sub-parts Z2 extending along the second direction Y, the first sub-part Z1 connects a plurality of first parts 501 arranged along the first direction X, the first sub-part Z1 has a first end and a second end relative to each other in the first direction X, a plurality of first ends are connected by the same second sub-part Z2, and a plurality of second ends are connected by the same second sub-part Z2, so as to facilitate preparation and reduce preparation difficulty.

[0060] See also Figure 4 In some optional embodiments, the edge of the orthographic projection of the side of the connecting portion 502 facing away from the substrate 100 on the substrate 100 includes a third edge B30 facing the corresponding first orthographic projection T1 and a fourth edge B40 facing away from the corresponding first orthographic projection T1, the distance between the first edge B10 and the third edge B30 is a first distance d1, and the distance between the second edge B20 and the fourth edge B40 is a second distance d2; the edge of the orthographic projection of the side of the connecting portion 502 facing the substrate 100 on the substrate 100 includes a fifth edge B50 facing the corresponding first orthographic projection T1 and a sixth edge B60 facing away from the corresponding first orthographic projection T1, the distance between the fifth edge B50 and the third edge B30 is a third distance d3, and the distance between the sixth edge B60 and the fourth edge B40 is a fourth distance d4; the sum of the first distance d1 and the third distance d3 is greater than the sum of the second distance d2 and the fourth distance d4.

[0061] It can be understood that the sum of the first distance d1 and the third distance d3 can be approximately regarded as the invasion length of water oxygen at the auxiliary electrode 500, and the sum of the first distance d1 and the third distance d3 is greater than the sum of the second distance d2 and the fourth distance d4, so as to increase the path length of water oxygen entering the via G from the first edge B10 along the surface of the first part 501 and the connecting part 502, thereby reducing the risk of the first electrode layer 300 and the light-emitting functional layer 200 being corroded by water oxygen.

[0062] Optionally, the sum of the first distance d1 and the third distance d3 is greater than the sum of the second distance d2 and the fourth distance d4 and may be equal, that is, the connecting portion 502 may adopt a symmetrical structure. For example, in a direction perpendicular to the plane where the substrate 100 is located, the cross-section of the connecting portion 502 may be formed in an isosceles trapezoid, a rectangle, or the like, so that the third edge B30 and the fourth edge B40 have the same size. The path length of water and oxygen intrusion into the light-emitting structure can be adjusted by adjusting the first distance and the second distance, which is easy to implement.

[0063] Optionally, the shortest distance between the first edge B10 and the third edge B30 is the first distance d1, the shortest distance between the second edge B20 and the fourth edge B40 is the second distance d2, the shortest distance between the fifth edge B50 and the third edge B30 is the third distance, and the shortest distance between the sixth edge B60 and the fourth edge B40 is the fourth distance d3, that is, the sum of the shortest distance between the first edge B10 and the third edge B30 and the shortest distance between the second edge B20 and the fourth edge B40 is greater than the sum of the shortest distance between the fifth edge B50 and the third edge B30 and the shortest distance between the sixth edge B60 and the fourth edge B40, so as to further increase the path length of water and oxygen intrusion into the light-emitting structure.

[0064] In some optional embodiments, the display panel 1 also includes a pixel definition layer PDL, which is arranged on one side of the substrate 100, and the pixel definition layer PDL includes a plurality of pixel openings, and part of the light-emitting device is located in the corresponding pixel openings; the orthographic projection of at least one auxiliary electrode 500 on the substrate 100 and the orthographic projection of the plurality of pixel openings on the substrate 100 do not overlap.

[0065] It is understandable that the orthographic projection of the auxiliary electrode 500 on the substrate 100 does not overlap with the orthographic projection of the pixel opening on the substrate 100, that is, the auxiliary electrode 500 will not block the light-emitting structure located in the pixel opening, thereby ensuring the light extraction efficiency of the light-emitting structure.

[0066] Optionally, the orthographic projection of at least one auxiliary electrode on the substrate 100 is located within the orthographic projection of a side of the pixel definition layer PDL away from the substrate 100 on the substrate 100 to avoid blocking the pixel opening.

[0067] Light-emitting structure In some optional embodiments, the display panel 1 further includes an isolation structure 600, which is disposed on a side of the pixel definition layer PDL away from the substrate 100, and the isolation structure 600 includes a plurality of isolation openings, which are connected to corresponding pixel openings, and parts of the light-emitting devices are located in the corresponding isolation openings;

[0068] Optionally, the orthographic projection of the pixel opening on the substrate 100 is located within the orthographic projection of the isolation opening on the substrate 100 .

[0069] In this embodiment, the isolation structure 600 is used to separate the light-emitting functional layer 200 and the first electrode layer 300 to achieve independent light emission of the light-emitting structures located in different isolation openings to avoid mutual interference and facilitate the formation of a patterned light-emitting functional layer 200 .

[0070] In the related art, the isolation structure 600 may include a conductive material, and the first electrode layer 300 is electrically connected to the conductive material. However, due to factors such as the structure of the isolation structure 600 itself and the preparation process, the first electrode layer 300 may not be electrically connected to the conductive material of the isolation structure 600, and the reliability is poor. It is impossible to connect the various parts of the first electrode layer 300 into an electrically connected whole through the conductive material of the isolation structure 600.

[0071] In order to avoid the above problems, in this embodiment, the first electrode is located in the isolation opening, and each first electrode and auxiliary electrode 500 are electrically connected to form an electrically connected whole. The first electrode layer 300 of each part is connected by setting an auxiliary structure to form an electrically connected whole. Therefore, the isolation structure 600 can adopt a conductive structure or an insulating structure.

[0072] For example, the isolation structure 600 includes a conductive material, and the first electrode layer 300 and the isolation structure 600 are electrically connected; or, the isolation structure 600 includes an insulating material, and the electrical connection of each first electrode portion is achieved only through an auxiliary structure.

[0073] Alternatively, the display panel may not be provided with the isolation structure 600. Figure 7 shown.

[0074] Optionally, the first encapsulation layer includes multiple first encapsulation parts, which are arranged on the side of the corresponding light-emitting device away from the substrate 100 and extend from the side wall of the isolation structure 600 to the side of the isolation structure 600 away from the substrate 100. The first encapsulation part is used to achieve encapsulation protection for the light-emitting structure.

[0075] Optionally, the via G is provided on the corresponding first packaging portion, and the projection of the bottom wall of the via G on the substrate 100 does not overlap with the projection of the side of the isolation structure 600 facing away from the substrate 100 on the substrate 100 to avoid interference between the via G and the isolation structure 600.

[0076] Optionally, the bottom wall of the via hole G is disposed close to the substrate 100 on a side of the isolation structure 600 facing away from the substrate 100 .

[0077] In some optional embodiments, the first orthographic projection T1 light emitting structure includes an avoidance gap P, and a portion of the orthographic projection of at least one auxiliary electrode 500 on the substrate 100 is located in the avoidance gap P.

[0078] It is understandable that since the auxiliary electrode 500 is usually made of metal and has good light-shielding performance, it is necessary to adjust the shape of the light-emitting structure to avoid the light output of the light-emitting structure being blocked by the auxiliary electrode 500, so as to improve the light output efficiency of the light-emitting structure. Optionally, the shape of the avoidance notch P matches the shape of the orthographic projection of the auxiliary electrode 500 on the substrate 100. For example, when the orthographic projection shape of the auxiliary electrode 500 on the substrate 100 is rectangular, the avoidance notch P may also be rectangular to improve space utilization, thereby improving the PPI of the display panel 1.

[0079] In some optional embodiments, the display panel 1 further includes a second encapsulation layer 700, which is disposed on the side of at least one auxiliary electrode 500 facing away from the substrate 100 and on the side of the first encapsulation layer 400 exposed by at least one auxiliary electrode 500 facing away from the substrate 100, and the second encapsulation layer 700 includes an organic material.

[0080] The organic material may be made of resin or high molecular organic material, and may be specifically formed by an IJP (Inkjet printing) process.

[0081] Optionally, the encapsulation layer also includes a third encapsulation layer 800 located on the side of the second encapsulation layer 700 away from the substrate 100. The material of the third encapsulation layer 800 includes an inorganic material. Continuing to add an inorganic encapsulation layer outside the organic encapsulation layer can further improve the encapsulation effect of the encapsulation layer. In this embodiment, the material of the third encapsulation layer 800 can be the same as or different from the material of the first encapsulation layer 400, and there is no special limitation.

[0082] The inorganic material may specifically be silicon nitride, silicon oxide, silicon oxynitride and the like, and may specifically be formed by a CVD (Chemical Vapor Deposition) process.

[0083] Optionally, the material of the first encapsulation layer 400 is the same as the material of the third encapsulation layer 800 , so that the first encapsulation layer 400 and the third encapsulation layer 800 can be prepared using the same equipment, which can simplify the preparation process of the display panel 1 .

[0084] Optionally, the first electrodes 300 of the light-emitting devices are connected in one piece to facilitate uniform signal transmission.

[0085] An embodiment of the present application further provides a display device, which includes the display panel 1 of any one of the above embodiments.

[0086] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; A plurality of light-emitting devices, each of which comprises a light-emitting functional layer and a first electrode which are sequentially stacked in a direction away from the substrate, wherein the light-emitting functional layer of the light-emitting device has a first orthographic projection on the substrate; A first packaging layer is provided on a side of the plurality of light-emitting devices away from the substrate, the first packaging layer is provided with a plurality of via holes, and the via holes have a second orthographic projection on the substrate; at least one auxiliary electrode, comprising a plurality of first portions and a plurality of connecting portions connected to each other, wherein the first portion is disposed on a side of the first packaging layer away from the substrate, and the connecting portion is disposed in a corresponding via hole and electrically connected to the corresponding first electrode; The edge of the orthographic projection of the first part on the substrate includes a first edge facing the corresponding first orthographic projection and a second edge away from the corresponding first orthographic projection, and the distance between the second orthographic projection and the corresponding first edge is greater than the distance between the second orthographic projection and the corresponding second edge.

2. The display panel according to claim 1, characterized in that: The shortest distance between the second orthographic projection and the corresponding first edge is greater than the shortest distance between the second orthographic projection and the corresponding second edge.

3. The display panel according to claim 1, characterized in that: The orthographic projection of the first portion on the substrate is a quadrilateral, the first edge includes a first side and a second side connected, the second edge includes a third side and a fourth side connected, the third side is connected to the first side, and the fourth side is connected to the second side; Preferably, the orthographic projection shape of the first part on the substrate is rectangular; Preferably, the orthographic projection shape of the connecting portion on the substrate is rectangular; Preferably, the difference between the distance between the second orthographic projection and the corresponding first edge and the distance between the second orthographic projection and the corresponding second edge is not less than 0.5 μm; Preferably, a difference between the shortest distance between the second orthographic projection and the corresponding first edge and the shortest distance between the second orthographic projection and the corresponding second edge is not less than 0.5 μm.

4. The display panel according to claim 1, characterized in that: The at least one auxiliary electrode includes a plurality of auxiliary electrodes, and the auxiliary electrode also includes a second portion disposed on a side of the first packaging layer away from the substrate, the second portion extending along a first direction parallel to a plane where the substrate is located, and connecting a plurality of the first portions arranged along the first direction.

5. The display panel according to claim 1, characterized in that: The at least one auxiliary electrode includes an auxiliary electrode, the auxiliary electrode also includes a second portion connected to the plurality of first portions, the second portion is disposed on a side of the first encapsulation layer away from the substrate, and extends along a first direction and a second direction parallel to a plane where the substrate is located, the first direction and the second direction intersecting; Preferably, the second portion includes a plurality of first sub-portions extending along the first direction and a second sub-portion extending along the second direction, the first sub-portion connects a plurality of the first portions arranged along the first direction, the first sub-portion has a first end and a second end opposite to each other in the first direction, the second sub-portion connects a plurality of the first ends, or the second sub-portion connects a plurality of the second ends; Preferably, the second part includes a plurality of first sub-parts extending along the first direction and a plurality of second sub-parts extending along the second direction, the first sub-part connects a plurality of first parts arranged along the first direction, the first sub-part has a first end and a second end relative to each other in the first direction, a plurality of the first ends are connected by the same second sub-part, and a plurality of the second ends are connected by the same second sub-part.

6. The display panel according to claim 1, characterized in that: The edge of the orthographic projection of the side of the connecting portion facing away from the substrate on the substrate includes a third edge facing the corresponding first orthographic projection and a fourth edge facing away from the corresponding first orthographic projection, the distance between the first edge and the third edge is a first distance, and the distance between the second edge and the fourth edge is a second distance; The edges of the orthographic projection of the side of the connecting portion facing the substrate on the substrate include a fifth edge facing the corresponding first orthographic projection and a sixth edge away from the corresponding first orthographic projection, the distance between the fifth edge and the third edge is a third distance, and the distance between the sixth edge and the fourth edge is a fourth distance; The sum of the first distance and the third distance is greater than the sum of the second distance and the fourth distance; Preferably, the shortest distance between the first edge and the third edge is the first distance, the shortest distance between the second edge and the fourth edge is the second distance, the shortest distance between the fifth edge and the third edge is the third distance, and the shortest distance between the sixth edge and the fourth edge is the fourth distance.

7. The display panel according to claim 1, characterized in that: Also includes: A pixel definition layer, disposed on one side of the substrate, the pixel definition layer comprising a plurality of pixel openings, and parts of the light emitting device are located in corresponding pixel openings; wherein the orthographic projection of the at least one auxiliary electrode on the substrate and the orthographic projection of the plurality of pixel openings on the substrate do not overlap; Preferably, the orthographic projection of the at least one auxiliary electrode on the substrate is located within the orthographic projection of the side of the pixel definition layer away from the substrate on the substrate. Preferably, the display panel further includes: An isolation structure is provided on a side of the pixel definition layer away from the substrate, the isolation structure comprises a plurality of isolation openings, the isolation openings are connected to the corresponding pixel openings, and a portion of the light emitting device is located in the corresponding isolation openings; Preferably, the orthographic projection of the pixel opening on the substrate is located within the orthographic projection of the isolation opening on the substrate; Preferably, the first electrode is located in the corresponding isolation opening; Preferably, the isolation structure comprises a conductive material, and the first electrode and the isolation structure are electrically connected, or the isolation structure comprises an insulating material; Preferably, the first encapsulation layer comprises a plurality of first encapsulation parts, wherein the first encapsulation parts are arranged on a side of the corresponding light-emitting device away from the substrate and extend from a side wall of the isolation structure to a side of the isolation structure away from the substrate; Preferably, the via hole is provided on the corresponding first packaging part, and a projection of a bottom wall of the via hole on the substrate does not overlap with a projection of a side of the isolation structure away from the substrate on the substrate; Preferably, the bottom wall of the via hole is arranged close to the substrate on a side of the isolation structure facing away from the substrate.

8. The display panel according to claim 1, characterized in that: The first orthographic projection comprises an avoidance gap, and a portion of the orthographic projection of the at least one auxiliary electrode on the substrate is located within the avoidance gap.

9. The display panel according to claim 1, characterized in that: Also includes: a second encapsulation layer, provided on a side of the at least one auxiliary electrode facing away from the substrate and on a side of the first encapsulation layer exposed by the at least one auxiliary electrode facing away from the substrate, the second encapsulation layer comprising an organic material; Preferably, the display panel further comprises a third encapsulation layer provided on a side of the second encapsulation layer away from the substrate, and the third encapsulation layer comprises an inorganic material; Preferably, the first encapsulation layer comprises an inorganic material; Preferably, the material of the first encapsulation layer is the same as the material of the third encapsulation layer; Preferably, the first electrodes of the light-emitting devices are connected in one piece.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

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