Display panel, manufacturing method thereof, and display device

Abstract

The present application relates to a display panel, a manufacturing method thereof, and a display device, wherein the display panel includes: a substrate; an auxiliary electrode layer and an insulating layer arranged on one side of the substrate, the auxiliary electrode layer being located between the insulating layer and the substrate, a first via being provided on the insulating layer, the first via being used to expose at least a portion of the auxiliary electrode layer; a light-emitting device layer arranged on a side of the insulating layer away from the substrate, the light-emitting device layer having multiple light-emitting areas and spacing areas between the multiple light-emitting areas, including a first electrode layer located in the light-emitting areas and the spacing areas, and the first electrode layer located in the spacing areas at least partially covering the first via and being electrically connected to the auxiliary electrode layer through the first via, thereby being equivalent to connecting a resistor in parallel to the first electrode layer, reducing the resistance of the first electrode layer, and thereby improving the IR‑drop problem caused by the large resistance of the first electrode layer, thereby ensuring the uniformity of the display brightness of the display panel and improving the display quality.

Description

Technical field

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

[0002] OLED (Organic Light Emitting Diode) display panels have become the next generation display panels with great competitiveness and development prospects due to their series of advantages such as self-luminescence, fast response speed, high brightness, full viewing angle, and flexible display.

[0003] However, since OLED display panels are current-driven devices, their brightness is very sensitive to changes in input current. In addition, the larger the display area, the more inconsistent the brightness of different areas of the OLED display panel will be due to the ohmic voltage drop (IR-drop) on the cathode. In particular, there will be a large difference in brightness between areas far away from the current input terminal and those close to the current input terminal within the OLED display panel, which will affect the uniformity of the display brightness of the OLED display panel. [Summary of the invention]

[0004] The purpose of the present application is to provide a display panel and a manufacturing method thereof, and a display device, so as to reduce the resistance of the cathode in the display panel, thereby reducing the influence of the ohmic voltage drop of the cathode on the uniformity of the display brightness of the display panel.

[0005] In order to solve the above problems, an embodiment of the present application provides a display panel, which includes: a substrate; an auxiliary electrode layer and an insulating layer arranged on one side of the substrate, the auxiliary electrode layer is located between the insulating layer and the substrate, and a first conductive hole is opened on the insulating layer, and the first conductive hole is used to expose at least part of the auxiliary electrode layer; a light-emitting device layer is arranged on the side of the insulating layer away from the substrate, the light-emitting device layer has multiple light-emitting areas and spacing areas between the multiple light-emitting areas, and includes a first electrode layer located in the light-emitting areas and the spacing areas, and the first electrode layer located in the spacing areas at least partially covers the first conductive hole, and is electrically connected to the auxiliary electrode layer through the first conductive hole.

[0006] The light-emitting device layer further includes a pixel defining layer, the pixel defining layer is located in the spacing region, and the first electrode layer is provided on a side of the pixel defining layer away from the substrate.

[0007] The orthographic projection of the pixel defining layer on the insulating layer is located outside the first conducting hole.

[0008] A second conductive hole is opened on the pixel defining layer, the second conductive hole is connected to the first conductive hole, and the first electrode layer is electrically connected to the auxiliary electrode layer through the second conductive hole and the first conductive hole.

[0009] The display panel further includes a conductive layer filled in the first conductive hole.

[0010] Among them, the light-emitting device layer also includes a second electrode layer, a light-emitting layer and an electronic functional layer which are sequentially away from the substrate. The first electrode layer is located on the side of the electronic functional layer away from the substrate. The electronic functional layer includes at least one of an electron transport layer and an electron injection layer, and the material of the conductive layer is the same as that of the electron transport layer, or the same as that of the electron injection layer.

[0011] The display panel has a display area and an overlapping area located around the display area. The light-emitting area and the spacing area are located in the display area. The first electrode layer is also located in the overlapping area, and the first electrode layer located in the overlapping area is in contact with the auxiliary electrode layer.

[0012] In order to solve the above problems, an embodiment of the present application also provides a method for manufacturing a display panel, which includes: providing a substrate; forming an auxiliary electrode layer and an insulating layer on one side of the substrate, the auxiliary electrode layer is located between the insulating layer and the substrate, and a first conductive hole is opened on the insulating layer, and the first conductive hole is used to expose at least part of the auxiliary electrode layer; forming a light-emitting device layer on the side of the insulating layer away from the substrate, the light-emitting device layer has multiple light-emitting areas and spacing areas between the multiple light-emitting areas, and includes a first electrode layer located in the light-emitting areas and the spacing areas, and the first electrode layer located in the spacing areas at least partially covers the first conductive hole, and is electrically connected to the auxiliary electrode layer through the first conductive hole.

[0013] The method for manufacturing the display panel further includes forming a conductive layer filled in the first conductive hole, wherein the first electrode layer in the spacing area at least partially covers the conductive layer and is electrically connected to the auxiliary electrode layer through the conductive layer.

[0014] In order to solve the above problems, an embodiment of the present application further provides a display device, which includes any one of the display panels described above.

[0015] The beneficial effect of the present application is that, different from the prior art, the display panel, its manufacturing method, and display device provided by the present application, by adding an auxiliary electrode layer in the display panel and electrically connecting the first electrode layer to the auxiliary electrode layer, is equivalent to connecting a resistor in parallel to the first electrode layer, thereby reducing the resistance of the first electrode layer, thereby improving the ohmic voltage drop (IR-drop) problem caused by the large resistance of the first electrode layer, and further ensuring the uniformity of characteristics such as display brightness of the display panel, thereby improving the display quality of the display panel.

Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

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

[0018] Figure 2 It is along Figure 1 A schematic diagram of the cross-sectional structure taken along line Q-Q';

[0019] Figure 3 It is along Figure 1 Another schematic cross-sectional view of the structure taken along line Q-Q';

[0020] Figure 4 It is along Figure 1 Schematic diagram of the cross-sectional structure taken along line R-R';

[0021] Figure 5 It is along Figure 1 Another schematic cross-sectional view of the structure taken along line RR';

[0022] Figure 6 is a schematic flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0023] Figure 7 It is a structural schematic diagram of the display device provided in an embodiment of the present application. [Specific implementation method]

[0024] The present application will be further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only intended to illustrate the present application and are not intended to limit the scope of the present application. Similarly, the following examples are only some examples of the present application and not all examples. All other examples obtained by those of ordinary skill in the art without creative work are intended to fall within the scope of protection of this application.

[0025] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of a top view of a display panel provided in an embodiment of the present application, Figure 2 It is along Figure 1 The cross-sectional structure diagram of the line Q-Q' in FIG. Figure 1 and Figure 2As shown, the display panel includes a substrate 11, an auxiliary electrode layer 12, an insulating layer 13 and a light-emitting device layer 14, wherein the auxiliary electrode layer 12 and the insulating layer 13 are arranged on one side of the substrate 11, and the auxiliary electrode layer 12 is located between the insulating layer 13 and the substrate 11, and the light-emitting device layer 14 is arranged on the side of the insulating layer 13 away from the substrate 11.

[0026] Specifically, the insulating layer 13 may be provided with a first via hole 131, the first via hole 131 being used to expose at least a portion of the auxiliary electrode layer 12. The light-emitting device layer 14 may have a plurality of light-emitting regions 14A and spacing regions 14B between the plurality of light-emitting regions 14A, and include a first electrode layer 141 located in the light-emitting regions 14A and the spacing regions 14B. The first electrode layer 141 located in the spacing regions 14B may at least partially cover the first via hole 131 and be electrically connected to the auxiliary electrode layer 12 through the first via hole 131.

[0027] In this embodiment, since the auxiliary electrode layer 12 is electrically connected to the first electrode layer 141, it is equivalent to connecting a resistor in parallel to the first electrode layer 141, which can reduce the resistance of the first electrode layer 141. Therefore, the IR-drop problem caused by the larger first electrode layer 141 can be improved, thereby ensuring the uniformity of characteristics such as display brightness of the display panel and improving the display quality of the display panel.

[0028] It is understood that in the display panel provided in this embodiment, the light-emitting device layer 14 within a light-emitting region 14A can be defined as a pixel (e.g., a blue pixel, a red pixel, or a green pixel). Furthermore, each pixel can include an anode, a cathode, and a light-emitting functional layer located between the anode and the cathode. Specifically, the pixel can be an organic light-emitting diode (OLED), a micro light-emitting diode (Micro LED), or other types of light-emitting devices.

[0029] In a specific embodiment, Figure 2 As shown, the light-emitting device layer 14 may further include a second electrode layer 142 and a light-emitting layer 143, which are sequentially spaced away from the substrate 11, and the first electrode layer 141 is located on a side of the light-emitting layer 143 facing away from the substrate 11. Specifically, the second electrode layer 142 may include a plurality of second electrodes arranged at intervals, and the plurality of second electrodes may be respectively located in the plurality of light-emitting regions 14A.

[0030] Furthermore, it is understandable that the second electrode layer 142 , the light-emitting layer 143 and the first electrode layer 141 located in the same light-emitting region 14A can respectively provide an anode, a light-emitting layer in the light-emitting functional layer, and a cathode in the same pixel.

[0031] In some specific embodiments, in order to improve the luminous efficiency of the display panel, such as Figure 2 As shown, the light emitting device layer 14 may further include an electronic functional layer 144, which is located between the light emitting layer 143 and the first electrode layer 141 and may be at least one of an electron transport layer and an electron injection layer. Figure 2 As shown, the light-emitting device layer 14 may further include a hole functional layer 145. The hole functional layer 145 is located between the light-emitting layer 143 and the second electrode layer 142 and may serve as at least one of a hole transport layer and a hole injection layer. Furthermore, it is understood that the electron functional layer 144, the hole functional layer 145, and the light-emitting layer 143 located within the same light-emitting region 14A constitute the light-emitting functional layers of a single pixel.

[0032] In this embodiment, the first electrode layer 141 is electrically connected to the auxiliary electrode layer 12 through the first conductive hole 131, which can include two situations. One situation is that the first electrode layer 141 covers and fills the first conductive hole 131 and contacts the auxiliary electrode layer 12 to achieve the electrical connection between the first electrode layer 141 and the auxiliary electrode layer 12. The other situation is that Figure 2 As shown, the above-mentioned display panel may further include a conductive layer 15 filled in the first conductive hole 131, and the conductive layer 15 is used to realize the conductive connection between the above-mentioned first electrode layer 141 and the auxiliary electrode layer 12, thereby avoiding the problem of increased local resistance of the first electrode layer 141 caused by the above-mentioned first conductive hole 131 being filled by the first electrode layer 141.

[0033] Specifically, the conductive layer 15 may be made of an inorganic ionic compound (e.g., LiF or NaF), or a mixed organic film layer doped with metals (e.g., Li, Na, Ca, Yb, Cs, etc.), and the conductive layer 15 may be a single-layer structure or a stacked-layer structure. The thickness of the conductive layer 15 may range from

[0034] Moreover, in other specific embodiments, when the light-emitting device layer 14 includes an electronic functional layer 144, and the electronic functional layer 144 includes at least one of an electron transport layer and an electron injection layer, the material of the conductive layer 15 may be the same as that of the electron transport layer, or the same as that of the electron injection layer, or the conductive layer 15 may include a first conductive layer and a second conductive layer stacked in a direction perpendicular to the substrate 11, and the materials of the first conductive layer and the second conductive layer may be the same as those of the electron transport layer and the electron injection layer, respectively. Thus, while ensuring good electrical conductivity of the conductive layer 15, the conductive layer 15 can be formed by the same process (for example, the same evaporation process or the same inkjet printing process) as the electron transport layer and / or electron injection layer, thereby reducing process steps and thus reducing production costs.

[0035] In some embodiments, as Figure 1 and Figure 2 As shown, the light-emitting device layer 14 may further include a pixel defining layer 146 . The pixel defining layer 146 is located in the spacing region 14B, and the first electrode layer 141 may be located on a side of the pixel defining layer 146 facing away from the substrate 11 .

[0036] Specifically, multiple light-emitting areas 14A can be arranged at intervals, and the pixel defining layer 146 can be arranged in the interval area between the multiple light-emitting areas 14A and around the multiple light-emitting areas 14A, and at least separate the second electrode layer 142 (i.e., the second electrode) and the light-emitting layer 143 in each light-emitting area 14A from the second electrode layer 142 and the light-emitting layer 143 in other light-emitting areas 14A located around it, thereby reducing optical crosstalk between adjacent light-emitting areas 14A (i.e., pixels).

[0037] In some specific embodiments, Figure 2 As shown, the orthographic projection of the pixel defining layer 146 on the insulating layer 13 may be located outside the first conductive hole 131 , that is, the pixel defining layer 146 may not cover the first conductive hole 131 .

[0038] In other specific embodiments, Figure 3 As shown, the pixel defining layer 146 may also cover the first conductive hole 131. Furthermore, to achieve conductive connection between the first electrode layer 141 and the auxiliary electrode layer 12, a second conductive hole 1461 may be formed on the pixel defining layer 146. The second conductive hole 1461 is connected to the first conductive hole 131, and the first electrode layer 141 may be electrically connected to the auxiliary electrode layer 12 through the second conductive hole 1461 and the first conductive hole 131. Furthermore, in an embodiment in which the conductive layer 15 is used to achieve conductive connection between the first electrode layer 141 and the auxiliary electrode layer 12, the conductive layer 15 may fill the second conductive hole 1461 and the first conductive hole 131.

[0039] In this embodiment, the above-mentioned first conductive hole 131 can be located directly below the light-emitting device layer 14 in the above-mentioned spacing area 14B, and not directly below the light-emitting device layer 14 in the above-mentioned light-emitting area 14A, so as to avoid the problem that the first conductive hole 131 occupies the light-emitting area 14A and causes the effective display area of ​​the display panel to be reduced.

[0040] Specifically, there may be a plurality of first conductive vias 131, and the plurality of first conductive vias 131 may be arranged in a regular pattern, for example, in rows and columns. Furthermore, it is understood that the greater the number of first conductive vias 131, the larger the area of ​​the auxiliary electrode layer 12 exposed to the first conductive vias 131, which is more conducive to reducing the resistance of the first electrode layer 141.

[0041] In a specific example, the plurality of first conductive vias 131 may be evenly distributed, and each light emitting region 14A may have at least one corresponding first conductive via 131 around its periphery.

[0042] In another specific example, the distribution density of the first conductive holes 131 may gradually increase in a direction from at least one boundary of the display panel to the center of the display panel.

[0043] In another specific example, the above-mentioned multiple first conductive holes 131 can be arranged in rows and columns, and the above-mentioned multiple light-emitting areas 14A can also be arranged in rows and columns. In a specific implementation, a row of first conductive holes 131 can be arranged every 2m or (2n+1) columns of light-emitting areas 14A in the row direction, and a row of first conductive holes 131 can be arranged every 2m' or (2n'+1) rows of light-emitting areas 14A in the column direction, wherein m and m' are positive integers, and n and n' are natural numbers.

[0044] In the above embodiment, the above-mentioned substrate 11 can be an array substrate, and can specifically include a stacked base and a TFT device layer. The above-mentioned auxiliary electrode layer 12, the insulating layer 13 and the light-emitting device layer 14 can all be arranged on the side of the TFT device layer away from the base, and the multiple pixels included in the above-mentioned light-emitting device layer 14 can all be electrically connected to the TFT device layer to control the light emission of the multiple pixels through the TFT device layer.

[0045] Specifically, the material of the substrate can be glass or hard resin, or can be one of organic polymers such as polyimide, polycarbonate, polyethylene terephthalate, polyethersulfone substrate, etc. The material of the auxiliary electrode layer 12 can be an oxide semiconductor or a metal (for example, at least one of Mo, Al, Ti), and the thickness of the auxiliary electrode layer 12 can be The insulating layer 13 may be made of one or more of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, tantalum nitride, titanium oxide, aluminum oxynitride, and silicon oxynitride, and the insulating layer 13 may electrically isolate the second electrode layer 142 from the auxiliary electrode layer 12. The first electrode layer 141 may be a light-transmitting electrode, and its material may include a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). The second electrode layer 142 may be a reflective electrode, and may include a first light-transmitting conductive layer, a second light-transmitting conductive layer, and a reflective layer located between the first light-transmitting conductive layer and the second light-transmitting conductive layer, wherein the first light-transmitting conductive layer and the second light-transmitting conductive layer may be made of a transparent conductive material such as ITO or IZO, and the reflective layer may be made of a metal material with high reflectivity such as silver or aluminum. The pixel defining layer 146 may be made of a positive photoresist, a negative photoresist, polystyrene, or a photosensitive resin.

[0046] In some specific embodiments, Figure 1 As shown, the display panel may have a display area C1 and an overlapping area C2 located around the display area C1. The light-emitting area 14A and the spacing area 14B may be located in the display area C1, and the first electrode layer 141 may include a portion located in the overlapping area C2 in addition to the portion located in the light-emitting area 14A and the spacing area 14B. The auxiliary electrode layer 12 may also be partially located in the overlapping area C2. The conductive layer 15 may include a portion located in the overlapping area C2 in addition to the portion filled in the first conductive hole 131. The conductive layer 15 in the overlapping area C2 is located between the first electrode layer 141 in the overlapping area C2 and the auxiliary electrode layer 12 in the overlapping area C2, and is used to connect the first electrode layer 141 in the overlapping area C2 and the auxiliary electrode layer 12 in the overlapping area C2, so as to share the current burden of the overlapping area C2 to improve the reliability of the display panel, and may also reduce the width and area of ​​the overlapping area C2 in disguise, which is beneficial to the narrow frame design of the display panel.

[0047] In one example, if Figure 4 As shown, the first electrode layer 141 located in the overlapping area C2 and the auxiliary electrode layer 12 located in the overlapping area C2 can be in contact to achieve a conductive connection between the two. In addition, in the embodiment in which the conductive layer 15 also includes a portion located in the overlapping area C2, and the conductive layer 15 in the overlapping area C2 is located between the first electrode layer 141 in the overlapping area C2 and the auxiliary electrode layer 12 in the overlapping area C2, and is used to connect the first electrode layer 141 in the overlapping area C2 and the auxiliary electrode layer 12 in the overlapping area C2 together, the boundary of the first electrode layer 141 in the overlapping area C2 can exceed the boundary of the conductive layer 15 in the overlapping area C2 (such as Figure 4), or it may be flush with the boundary of the conductive layer 15 in the overlapping area C2 (as shown in FIG. Figure 5 shown).

[0048] It should also be noted that, compared with the solution in which the boundary of the first electrode layer 141 in the overlapping area C2 is flush with the boundary of the conductive layer 15 in the overlapping area C2, the solution in which the boundary of the first electrode layer 141 in the overlapping area C2 exceeds the boundary of the conductive layer 15 in the overlapping area C2 can make the resistance of the first electrode layer 141 in the overlapping area C2 smaller, which is more conducive to reducing the current load of the overlapping area C2, and thus is more conducive to improving the reliability of the display panel.

[0049] In a specific embodiment, Figure 1 As shown, the auxiliary electrode layer 12 located in the overlapping area C2 can be electrically connected to the driving chip (IC) 16 outside the above-mentioned display panel through the wiring outside the above-mentioned display panel, thereby realizing the conductive connection between the above-mentioned first electrode layer 141 and the driving chip 16 outside the above-mentioned display panel, and then performing signal control.

[0050] From the above, it can be seen that the display panel provided in this embodiment adds an auxiliary electrode layer in the display panel and electrically connects the first electrode layer to the auxiliary electrode layer, which is equivalent to connecting a resistor in parallel to the first electrode layer, thereby reducing the resistance of the first electrode layer. Therefore, it can improve the ohmic voltage drop (IR-drop) problem caused by the large resistance of the first electrode layer, and further ensure the uniformity of the display brightness and other characteristics of the display panel, thereby improving the display quality of the display panel.

[0051] See also Figure 6 , Figure 6 The flowchart of the method for manufacturing the display panel provided in the embodiment of the present application is also provided in Figures 1 to 5 , Figures 1 to 5 This is a schematic diagram of the structure of a display panel manufactured by the method for manufacturing a display panel provided by an embodiment of the present application. Figures 1 to 6 As shown, the specific process of the method for manufacturing the display panel provided in this embodiment can be as follows:

[0052] S11: providing a substrate 11.

[0053] S12: forming an auxiliary electrode layer 12 and an insulating layer 13 on one side of the substrate 11 , wherein the auxiliary electrode layer 12 is located between the insulating layer 13 and the substrate 11 , and a first conductive hole 131 is opened on the insulating layer 13 , and the first conductive hole 131 is used to expose at least a portion of the auxiliary electrode layer 12 .

[0054] The above S12 may specifically include:

[0055] S121: forming an auxiliary electrode material layer on one side of the substrate 11 and patterning the auxiliary electrode material layer to form the auxiliary electrode layer 12;

[0056] S122 : forming an insulating material layer covering the auxiliary electrode layer 12 on one side of the substrate 11 , and patterning the insulating material layer to form the insulating layer 13 having the first conductive hole 131 .

[0057] Specifically, the patterning process may include process steps such as coating, pre-curing, exposure, development, main curing, etching, and demolding.

[0058] S13: A light-emitting device layer 14 is formed on the side of the insulating layer 13 facing away from the substrate 11. The light-emitting device layer 14 has a plurality of light-emitting regions 14A and a spacing region 14B located between the plurality of light-emitting regions 14A, and includes a first electrode layer 141 located in the light-emitting regions 14A and the spacing region 14B. The first electrode layer 141 located in the spacing region 14B at least partially covers the first conductive hole 131, and is electrically connected to the auxiliary electrode layer 12 through the first conductive hole 131.

[0059] The above S13 may specifically include:

[0060] S131: forming a second electrode material layer on a side of the insulating layer 13 facing away from the substrate 11, and patterning the second electrode material layer to form the second electrode layer 142 including a plurality of second electrodes arranged at intervals;

[0061] S132: forming the pixel defining layer 146 between the plurality of second electrodes on a side of the insulating layer 13 facing away from the substrate 11, wherein the pixel defining layer 146 has a plurality of pixel openings, each of which is used to expose the plurality of second electrodes;

[0062] S133: forming the hole injection layer, the hole transport layer and the light emitting layer 143 on the second electrode in the pixel opening by an inkjet printing process;

[0063] S134: forming an electron injection layer and an electron transport layer on the light emitting layer 143 in the pixel opening by using an evaporation process or an inkjet printing process;

[0064] S135 : forming the first electrode layer 141 on the pixel defining layer 146 by using an evaporation process or a magnetron sputtering process.

[0065] In some specific embodiments, after forming the above-mentioned first electrode layer 141, a thin film encapsulation layer can also be formed on the above-mentioned first electrode layer 141. The thin film encapsulation layer may include a first inorganic layer, an organic layer, and a second inorganic layer stacked on the above-mentioned first electrode layer 141 to prevent external water and oxygen from penetrating into the above-mentioned light-emitting device layer 14 and causing display abnormalities, thereby improving the reliability of the above-mentioned display panel.

[0066] In some embodiments, the method for manufacturing the display panel may further include:

[0067] S14 : forming a conductive layer 15 filling the first conductive holes 131 , and the first electrode layer 141 in the spacing region 14B at least partially covers the conductive layer 15 and is electrically connected to the auxiliary electrode layer 12 through the conductive layer 15 .

[0068] Specifically, the conductive layer 15 can be made of the same material as the electron injection layer, and can be formed using the same inkjet printing or evaporation process as the electron injection layer. Furthermore, in another embodiment, the conductive layer 15 can be made of the same material as the electron transport layer, and can be formed using the same inkjet printing or evaporation process as the electron transport layer. This can save process steps and reduce production costs.

[0069] It should be noted that the specific structure of the display panel in this embodiment can refer to the specific implementation in the above-mentioned embodiment of the display panel, so it will not be repeated here.

[0070] As can be seen from the above, the manufacturing method of the display panel provided in this embodiment provides a substrate and forms an auxiliary electrode layer and an insulating layer on one side of the substrate, the auxiliary electrode layer is located between the insulating layer and the substrate, and a first conductive hole is opened on the insulating layer, the first conductive hole is used to expose at least part of the auxiliary electrode layer, and then a light-emitting device layer is formed on the side of the insulating layer away from the substrate, the light-emitting device layer has multiple light-emitting areas and spacing areas between the multiple light-emitting areas, and includes a first electrode layer located in the light-emitting area and the spacing area, and the first electrode layer located in the spacing area at least partially covers the first conductive hole, and is electrically connected to the auxiliary electrode layer through the first conductive hole, which is equivalent to connecting a resistor in parallel to the first electrode layer, reducing the resistance of the first electrode layer, and thus can improve the ohmic voltage drop (IR-drop) problem caused by the large resistance of the first electrode layer, thereby ensuring the uniformity of characteristics such as display brightness of the display panel, and improving the display quality of the display panel.

[0071] See also Figure 7 , Figure 7 FIG2 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. The display device 200 includes a display panel 201 according to any of the above embodiments.

[0072] Specifically, the display panel 201 includes a substrate, an auxiliary electrode layer and an insulating layer disposed on one side of the substrate, and a light-emitting device layer disposed on a side of the insulating layer facing away from the substrate. The auxiliary electrode layer is located between the insulating layer and the substrate, and a first conductive via is defined in the insulating layer, exposing at least a portion of the auxiliary electrode layer. The light-emitting device layer has multiple light-emitting regions and spacing regions between the multiple light-emitting regions. The light-emitting device layer includes a first electrode layer located in the light-emitting regions and the spacing regions. The first electrode layer located in the spacing regions at least partially covers the first conductive via and is electrically connected to the auxiliary electrode layer through the first conductive via.

[0073] It should be noted that the display device in the embodiment of the present application has the same beneficial effects as the above-mentioned display panel because it is provided with the display panel provided in the embodiment of the present application.

[0074] The embodiments of the present application do not impose any specific restrictions on the applicability of the display device, which can be any product or component with display function, such as a television, a laptop computer, a tablet computer, a wearable display device (such as a smart bracelet, a smart watch, etc.), a mobile phone, a virtual reality device, an augmented reality device, a car display, an advertising light box, etc.

[0075] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0076] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel has a display area and an overlap area located around the display area, and the display panel includes: substrate; an auxiliary electrode layer and an insulating layer provided on one side of the substrate, the auxiliary electrode layer being located between the insulating layer and the substrate, and a first conductive hole being formed in the insulating layer, the first conductive hole being used to expose at least a portion of the auxiliary electrode layer, and at least a portion of the auxiliary electrode being located in the overlapping region; a light-emitting device layer disposed on a side of the insulating layer facing away from the substrate, the light-emitting device layer having a plurality of light-emitting regions and spacing regions between the plurality of light-emitting regions, and including a first electrode layer located in the light-emitting regions and the spacing regions; wherein the light-emitting regions and the spacing regions are located in the display region, and the first electrode layer is also located in the overlapping region; A conductive layer is filled in the first via hole, a side of the conductive layer close to the substrate is connected to the auxiliary electrode layer, at least a portion of the conductive layer is located in the overlapping region, and in the overlapping region, the conductive layer is located between the first electrode layer and the auxiliary electrode layer, and is used to connect the first electrode layer and the auxiliary electrode layer in the overlapping region together; The first electrode layer in the spacing region at least partially covers the conductive layer and is electrically connected to the auxiliary electrode layer through the conductive layer. The boundary of the first electrode layer in the overlapping region exceeds the boundary of the conductive layer.

2. The display panel according to claim 1, wherein: The light emitting device layer further includes a pixel defining layer, the pixel defining layer is located in the spacing region, and the first electrode layer is provided on a side of the pixel defining layer away from the substrate.

3. The display panel according to claim 2, wherein: An orthographic projection of the pixel defining layer on the insulating layer is located outside the first conducting hole.

4. The display panel according to claim 2, wherein: A second conductive hole is formed on the pixel defining layer, the second conductive hole is connected to the first conductive hole, and the first electrode layer is electrically connected to the auxiliary electrode layer through the second conductive hole and the first conductive hole.

5. The display panel according to claim 1, wherein: The light-emitting device layer also includes a second electrode layer, a light-emitting layer and an electronic functional layer, which are sequentially away from the substrate. The first electrode layer is located on the side of the electronic functional layer away from the substrate. The electronic functional layer includes at least one of an electron transport layer and an electron injection layer, and the material of the conductive layer is the same as that of the electron transport layer, or the same as that of the electron injection layer.

6. A method for manufacturing a display panel, wherein the display panel comprises a display area and an overlap area located around the display area, wherein: include: providing a substrate; An auxiliary electrode layer and an insulating layer are formed on one side of the substrate, wherein the auxiliary electrode layer is located between the insulating layer and the substrate, and a first conductive hole is opened in the insulating layer, wherein the first conductive hole is used to expose at least a portion of the auxiliary electrode layer, and at least a portion of the auxiliary electrode is located in the overlapping area; A light-emitting device layer is formed on a side of the insulating layer facing away from the substrate, the light-emitting device layer having a plurality of light-emitting regions and spacing regions between the plurality of light-emitting regions, and including a first electrode layer located in the light-emitting regions and the spacing regions, wherein the first electrode layer located in the spacing regions at least partially covers the first conductive vias and is electrically connected to the auxiliary electrode layer through the first conductive vias; wherein the light-emitting regions and the spacing regions are located in the display region, and the first electrode layer is also located in the overlapping region; A conductive layer is formed to fill the first conductive hole, wherein the conductive layer is connected to the auxiliary electrode layer on a side close to the substrate, at least part of the conductive layer is located in the overlapping area, and in the overlapping area, the conductive layer is located between the first electrode layer and the auxiliary electrode layer, and is used to connect the first electrode layer and the auxiliary electrode layer in the overlapping area together; wherein the first electrode layer located in the spacing area at least partially covers the conductive layer, and is electrically connected to the auxiliary electrode layer through the conductive layer, and the boundary of the first electrode layer located in the overlapping area exceeds the boundary of the conductive layer.

7. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 5.

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