Display panel and display device

Abstract

The present invention provides a display panel and a display device, wherein the display panel includes a plurality of pixel units located in a plurality of light-emitting areas, and each pixel unit includes at least one auxiliary electrode and a plurality of light-emitting devices. The light-emitting device includes a first electrode, a second electrode and a lap electrode, wherein the lap electrode is located on one side of the second electrode in the thickness direction of the display panel, and the first electrode and the auxiliary electrode are arranged at intervals. An undercut opening is provided in a portion of the pixel definition layer corresponding to the light-emitting area, and the undercut opening exposes at least a portion of the first electrode and a side surface of the auxiliary electrode opposite to the first electrode. The second electrode and the lap electrode are both located in the light-emitting area and are both located on the pixel definition layer and the first electrode, and the lap electrode is in contact with the side surface of the auxiliary electrode, so that the second electrode located on the first electrode is electrically connected to the auxiliary electrode through the lap electrode. By arranging the auxiliary electrode only in the light-emitting area and arranging it at intervals from the first electrode, the light transmittance of the display panel can be improved.

Description

Technical Field

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

[0002] In existing display devices, the cathode of the light-emitting device is often arranged on the light-emitting layer and the pixel definition layer in a whole-surface design. However, the cathode arranged on the whole surface will affect the transmittance of the display panel, making it difficult for the display panel to meet the requirement of high transmittance. Summary of the invention

[0003] Embodiments of the present invention provide a display panel and a display device, which can improve the light transmittance of the display panel.

[0004] An embodiment of the present invention provides a display panel, comprising a light-emitting area and a non-light-emitting area between the plurality of light-emitting areas. The display panel comprises a plurality of pixel units located in the plurality of light-emitting areas, each of the pixel units comprising at least one auxiliary electrode and a plurality of light-emitting devices. At least one of the light-emitting devices comprises a first electrode, a second electrode, a lap electrode and a light-emitting layer located between the first electrode and the second electrode, the lap electrode being located on one side of the second electrode in the thickness direction of the display panel. The display panel comprises a substrate and a pixel definition layer. The first electrode and the auxiliary electrode are both located on the substrate, and the first electrode and the auxiliary electrode are arranged at intervals. The pixel definition layer is located on the substrate and the auxiliary electrode, and a bottom cut opening is provided in a portion of the pixel definition layer corresponding to the light-emitting area, and the bottom cut opening exposes at least a portion of the first electrode and a side surface of the auxiliary electrode opposite to the first electrode. The light-emitting layer, the second electrode and the lap electrode are all located in the light-emitting area and on the pixel definition layer and the first electrode, and the lap electrode is in contact with the side surface of the auxiliary electrode.

[0005] Optionally, in some embodiments of the present invention, at least one of the light-emitting areas includes a common area, and the common area is correspondingly surrounded by the plurality of light-emitting devices included in the pixel unit. The auxiliary electrode is located in the common area, and the lapped electrodes of the plurality of light-emitting devices are in contact with different parts of the side surface of the auxiliary electrode.

[0006] Optionally, in some embodiments of the present invention, the pixel definition layer includes a first portion located on the auxiliary electrode, an edge of the first portion exceeds the auxiliary electrode, and the first portion and the auxiliary electrode together surround the undercut opening.

[0007] Optionally, in some embodiments of the present invention, the light transmittance of the auxiliary electrode is greater than the light transmittance of the first electrode, and the light transmittance of the second electrode is less than the light transmittance of the overlapping electrode.

[0008] Optionally, in some embodiments of the present invention, the light transmittance of the second electrode is greater than or equal to 20% and less than or equal to 80%, and the light transmittance of the overlapping electrode is greater than 20% and less than or equal to 80%.

[0009] Optionally, in some embodiments of the present invention, the overlapping electrode is located on a side of the second electrode away from the first electrode; or the second electrode is located on a side of the overlapping electrode away from the first electrode.

[0010] Optionally, in some embodiments of the present invention, the auxiliary electrode includes a first main body portion and a first connecting portion extending from a side of the first main body portion toward the substrate, and the first connecting portion is electrically connected to the first voltage terminal.

[0011] Optionally, in some embodiments of the present invention, the substrate includes a gate layer and a source-drain layer, and the source-drain layer is located on the gate layer. The gate layer and / or the source-drain layer includes a first signal line, and the first signal line is electrically connected between the first voltage terminal and the first connection portion.

[0012] Optionally, in some embodiments of the present invention, the display panel includes a first display area and a second display area, the first display area includes a plurality of the light-emitting areas and a plurality of the non-light-emitting areas, and the transmittance of the first display area is greater than the transmittance of the second display area. The display panel includes a light sensor arranged corresponding to the first display area.

[0013] The present invention further provides a display device, comprising any one of the above-mentioned display panels.

[0014] The present invention provides a display panel and a display device, wherein the display panel includes a light-emitting area and a non-light-emitting area located between the plurality of light-emitting areas. The display panel includes a plurality of pixel units located in the plurality of light-emitting areas, each pixel unit includes at least one auxiliary electrode and a plurality of light-emitting devices. The at least one light-emitting device includes a first electrode, a second electrode, a lap electrode and a light-emitting layer located between the first electrode and the second electrode, wherein the lap electrode is located on one side of the second electrode in the thickness direction of the display panel. The display panel includes a substrate and a pixel definition layer. The first electrode and the auxiliary electrode are both located on the substrate, and the first electrode and the auxiliary electrode are arranged at intervals. The pixel definition layer is located on the substrate and the auxiliary electrode, and a bottom cut opening is provided in a portion of the pixel definition layer corresponding to the light-emitting area, and the bottom cut opening exposes at least a portion of the first electrode and a side surface of the auxiliary electrode opposite to the first electrode. The light-emitting layer, the second electrode and the lap electrode are all located in the light-emitting area and are all located on the pixel definition layer and the first electrode, and the lap electrode is in contact with a side surface of the auxiliary electrode. Compared with the prior art method of setting the cathode on the entire surface, the present application sets the auxiliary electrode only in the light-emitting area and is spaced apart from the first electrode, and does not set the auxiliary electrode in the non-light-emitting area, which can improve the light transmittance of the display panel. An undercut opening is set in the pixel definition layer to expose at least part of the first electrode and the side of the auxiliary electrode opposite to the first electrode, so that the lap electrode on the first electrode can contact the side of the auxiliary electrode, so that the second electrode on the first electrode is electrically connected to the auxiliary electrode through the lap electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0017] Figure 2A to Figure 2B Schematic diagram of the structure of a pixel unit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0019] Specifically, Figure 1 is a schematic diagram of the structure of a display panel provided by an embodiment of the present invention. Optionally, the display panel includes a self-luminous display panel.

[0020] The display panel includes a plurality of light-emitting areas 100a and a non-light-emitting area 100b located between the plurality of light-emitting areas 100a. The display panel includes a plurality of pixel units located in the plurality of light-emitting areas 100a.

[0021] like Figure 2A to Figure 2B 1 is a schematic diagram of the structure of a pixel unit provided in an embodiment of the present invention. Each of the pixel units comprises at least one auxiliary electrode 101 and a plurality of light emitting devices 102. Optionally, the light emitting devices 102 comprise organic light emitting diodes, sub-millimeter light emitting diodes, micro light emitting diodes, and the like.

[0022] At least one of the light emitting devices 102 includes a first electrode 1021, a second electrode 1022, a lap electrode 1023 and a light emitting layer 1024. The light emitting layer 1024 is located between the first electrode 1021 and the second electrode 1022, and the lap electrode 1023 is located on one side of the second electrode 1022 in the thickness direction of the display panel.

[0023] Optionally, the first electrode 1021 is the anode of the light-emitting device 102 , and the second electrode 1022 , the lap electrode 1023 and the auxiliary electrode 101 together form the cathode of the light-emitting device 102 .

[0024] Optionally, the light emitting device 102 further includes a hole transport layer, a hole injection layer, an electron transport layer, an electron injection layer and other parts not shown.

[0025] Optionally, the bonding electrode 1023 is located on a side of the second electrode 1022 away from the first electrode 1021, and the light-emitting layer 1024 is located between the first electrode 1021 and the second electrode 1022; or the second electrode 1022 is located on a side of the bonding electrode 1023 away from the first electrode 1021, and the light-emitting layer 1024 is located between the first electrode 1021 and the bonding electrode 1023. By making the bonding electrode 1023 and the second electrode 1022 directly contact each other, the electrical connection between the second electrode 1022 and the bonding electrode 1023 is achieved. It can be understood that the relative position, material, film thickness, etc. of the bonding electrode 1023 and the second electrode 1022 can be set according to actual design requirements.

[0026] The display panel includes a substrate 103 and a pixel definition layer 104 .

[0027] The first electrode 1021 and the auxiliary electrode 101 are both located on the substrate 103 , and the first electrode 1021 and the auxiliary electrode 101 are spaced apart from each other.

[0028] The pixel definition layer 104 is located on the substrate 103 and the auxiliary electrode 101. The portion of the pixel definition layer 104 corresponding to the light emitting area 100a is provided with an undercut opening, and the undercut opening exposes at least a portion of the first electrode 1021 and a side surface of the auxiliary electrode 101 opposite to the first electrode 1021.

[0029] The light-emitting layer 1024 , the second electrode 1022 and the bonding electrode 1023 are all located in the light-emitting area 100 a and on the pixel definition layer 104 and the first electrode 1021 . The bonding electrode 1023 is in contact with the side surface of the auxiliary electrode 101 .

[0030] By arranging the plurality of light-emitting devices 102 and at least one auxiliary electrode 101 included in the pixel unit in the light-emitting area 100a, so that there is no auxiliary electrode 101 and the light-emitting device 102 in the non-light-emitting area 100b, the light transmittance of the display panel can be improved. By contacting the lap electrode 1023 with the side surface of the auxiliary electrode 101, the electrical connection between the lap electrode 1023 and the auxiliary electrode 101 is achieved. The second electrode 1022 located on the first electrode 1021 can be electrically connected to the auxiliary electrode 101 through the lap electrode 1023, so that the second electrode 1022 cooperates with the first electrode 1021 and the light-emitting layer 1024 to form a microcavity effect, and the normal light emission of the light-emitting device 102 is achieved.

[0031] When only one of the light-emitting devices 102 in the pixel unit is electrically connected to the auxiliary electrode 101 , the remaining light-emitting devices may be electrically connected to the light-emitting device electrically connected to the auxiliary electrode 101 , so that the plurality of light-emitting devices 102 included in the pixel unit are electrically connected to the auxiliary electrode 101 .

[0032] Please continue reading Figure 2A to Figure 2B , the lapped electrodes 1023 of the multiple light-emitting devices 102 included in the pixel unit can all be electrically connected to the auxiliary electrode 101. Among them, the lapped electrodes 1023 of the multiple light-emitting devices 102 can be electrically connected to the multiple auxiliary electrodes 101 correspondingly, and the lapped electrodes 1023 of the multiple light-emitting devices 102 can also be electrically connected to one auxiliary electrode 101. It can be understood that when the lapped electrodes 1023 of the multiple light-emitting devices 102 are electrically connected to one auxiliary electrode 101, the number of the auxiliary electrodes 101 included in the display panel is reduced, which is beneficial to reducing the setting area of ​​the auxiliary electrode 101, improving the light transmittance of the display panel and reducing the manufacturing cost of the display panel.

[0033] Specifically, at least one of the light-emitting areas 100a includes a common area, and the common area is correspondingly surrounded by the plurality of light-emitting devices 102 included in the pixel unit. The auxiliary electrode 101 is located in the common area, and the lapped electrodes 1023 of the plurality of light-emitting devices 102 are in contact with different parts of the side surface of the auxiliary electrode 101.

[0034] The pixel unit includes four light-emitting devices 102 as an example for description. Specifically, the pixel unit includes a first light-emitting device 102a, a second light-emitting device 102b, a third light-emitting device 102c and a fourth light-emitting device 102d. The first light-emitting device 102a is adjacent to the second light-emitting device 102b and the fourth light-emitting device 102d, the third light-emitting device 102c is adjacent to the second light-emitting device 102b and the fourth light-emitting device 102d, and the third light-emitting device 102c is opposite to the first light-emitting device 102a. The common area is surrounded by the first light-emitting device 102a, the second light-emitting device 102b, the third light-emitting device 102c and the fourth light-emitting device 102d. The auxiliary electrode 101 is located in the common area, and the auxiliary electrode 101 includes a first side surface opposite to the first light-emitting device 102a, a second side surface opposite to the second light-emitting device 102b, a third side surface opposite to the third light-emitting device 102c, and a fourth side surface opposite to the fourth light-emitting device 102d. The lapped electrode 1023 of the first light-emitting device 102a contacts the first side surface of the auxiliary electrode 101, the lapped electrode 1023 of the second light-emitting device 102b contacts the second side surface of the auxiliary electrode 101, the lapped electrode 1023 of the third light-emitting device 102c contacts the third side surface of the auxiliary electrode 101, and the lapped electrode 1023 of the fourth light-emitting device 102d contacts the fourth side surface of the auxiliary electrode 101.

[0035] Optionally, in a top view, the shape of the auxiliary electrode 101 is not limited to at least one of a rectangle, a circle, and a polygon.

[0036] Please continue reading Figure 2A, the pixel definition layer 104 includes a first portion 1041 located on the auxiliary electrode 101, the edge of the first portion 1041 exceeds the auxiliary electrode 101, and the first portion 1041 and the auxiliary electrode 101 jointly surround the bottom cut opening, so that when preparing the display, the first portion 1041 can be used to separate the film layers (such as the hole transport layer, the hole injection layer, the electron transport layer, the electron injection layer, the light-emitting layer 1024 and the second electrode 1022) prepared by the evaporation process, to ensure that the lapped electrode 1023 can be directly lapped with the auxiliary electrode 101. Optionally, the lapped electrode 1023 is prepared by a sputtering process. Compared with the sputtering process, the effective area of ​​the film layer prepared by the evaporation process is smaller (that is, the coverage area of ​​the film layer prepared by the evaporation process is smaller), so that the film layer prepared by the evaporation process will not cover the side of the auxiliary electrode 101 under the shielding of the first portion 1041. The effective area of ​​the film layer prepared by the sputtering process is relatively large, which is conducive to forming the overlap between the auxiliary electrode 101 and the overlapping electrode 1023 , thereby realizing the electrical connection between the overlapping electrode 1023 and the auxiliary electrode 101 .

[0037] In addition, the conductive property of the lapped electrode 1023 is better than that of the hole transport layer, the hole injection layer, the electron transport layer, the electron injection layer and the light emitting layer 1024. Therefore, if the hole transport layer, the hole injection layer, the electron transport layer, the electron injection layer and the light emitting layer 1024 are prepared by sputtering, the hole transport layer, the hole injection layer, the electron transport layer, the electron injection layer and the light emitting layer 1024 may contact the side of the auxiliary electrode 101, affecting the electrical connection effect between the lapped electrode 1023 and the auxiliary electrode 101.

[0038] Optionally, the first portion 1041 may also include the second electrode 1022 and the lapped electrode 1023. In a top view, the shapes of the second electrode 1022 and the lapped electrode 1023 include a rectangle, a circle, a polygon, etc. Optionally, the shapes of the second electrode 1022 and the lapped electrode 1023 are the same as the shapes of the plurality of light-emitting devices 102 included in the pixel unit in a top view, so as to increase the area of ​​the non-luminous region 100b. It is understandable that the shapes and sizes of the second electrode 1022 and the lapped electrode 1023 can be determined according to the shape and size of the pixel unit, which will not be described in detail here.

[0039] Please continue reading Figure 2A to Figure 2B The light transmittance of the auxiliary electrode 101 is greater than the light transmittance of the first electrode 1021 , and the light transmittance of the second electrode 1022 is less than the light transmittance of the overlapping electrode 1023 .

[0040] Optionally, in order to further improve the light transmittance of the display panel, the auxiliary electrode 101 is a transparent electrode. Optionally, the auxiliary electrode 101 includes molybdenum, silver, indium tin oxide, indium zinc oxide, etc.

[0041] Optionally, the transmittance of the second electrode 1022 is greater than or equal to 20% and less than or equal to 80%, and the transmittance of the overlapping electrode 1023 is greater than 20%. For example, the transmittance of the second electrode 1022 may be equal to 20%, 30%, 40%, 45%, 50%, 55%, 60%, 70%, 80%, etc., and the transmittance of the overlapping electrode 1023 may be equal to 25%, 30%, 40%, 45%, 50%, 55%, 60%, 70%, 80%, 81%, 85%, 86%, 90%, 92%, 95%, 96%, 98%, 100%.

[0042] Optionally, the second electrode 1022 includes at least one of magnesium, aluminum, silver, etc.; the lap electrode 1023 includes indium tin oxide, indium zinc oxide, etc. It can be understood that the light transmittance of the second electrode 1022 can be adjusted by adjusting the film thickness.

[0043] Please continue reading Figure 2A to Figure 2B The auxiliary electrode 101 includes a first main body and a first connecting portion extending from a side of the first main body toward the substrate 103, and the first connecting portion is electrically connected to a first voltage terminal, so as to realize an electrical connection between the first voltage terminal and the bonding electrode 1023 through the auxiliary electrode 101, thereby transmitting a first voltage signal to the bonding electrode 1023 through the auxiliary electrode 101 and the first voltage terminal. The first voltage signal is provided by the first voltage terminal.

[0044] Optionally, the substrate 103 includes a gate layer and a source-drain layer, and the source-drain layer is located on the gate layer. The gate layer and / or the source-drain layer include a first signal line SL, and the first signal line SL is electrically connected between the first voltage terminal and the first connecting portion. Compared with the design of setting the first signal line SL in the frame area of ​​the display panel in the prior art, the present invention sets the first signal line SL in the display area of ​​the display panel, and the first signal line is electrically connected to the first connecting portion of the auxiliary electrode 101, which can reduce the frame width of the display panel.

[0045] Optionally, the substrate 103 includes at least one gate layer and at least one source-drain layer. Specifically, the substrate 103 includes a substrate 1031 , a first active layer 1032 , a first gate layer 1033 , a first source-drain layer 1034 , a first gate insulating layer 1035 and a first interlayer insulating layer 1036 .

[0046] The substrate 1031 includes a rigid substrate and a flexible substrate. For example, the substrate 1031 may include a single-layer insulating material such as glass, quartz, and polymer resin, or a multi-layer insulating material such as a double-layer polymer resin.

[0047] The first active layer 1032 is located on the substrate 1031, and the first active layer 1032 includes a plurality of first active patterns, each of which includes a source region, a drain region, and a channel region located between the source region and the drain region. Optionally, the first active pattern includes amorphous silicon, polycrystalline silicon, or a metal oxide material. The metal oxide material may include any one of an oxide based on titanium (Ti), hafnium (Hf), zirconium (Zr), aluminum (Al), tantalum (Ta), germanium (Ge), zinc (Zn), gallium (Ga), tin (Sn), or indium (In) or a composite oxide thereof; for example, the metal oxide material may include indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), or indium gallium zinc tin oxide (IGZTO), etc.

[0048] The first gate insulating layer 1035 is located between the first gate layer 1033 and the first active layer 1032. Optionally, the first gate insulating layer 1035 includes a silicon compound, a metal oxide, etc. Further, the first gate insulating layer 1035 includes silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, tantalum oxide, hafnium oxide, zirconium oxide, titanium oxide, etc.

[0049] The first gate layer 1033 is located on the first active layer 1032, and the first gate layer 1033 includes a plurality of gate patterns, each of which is aligned with the channel region between the source region and the drain region. Optionally, the first gate layer 1033 includes at least one of molybdenum (Mo), aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), titanium (Ti), tantalum (Ta), tungsten (W), copper (Cu), etc. Optionally, the first gate layer 1033 can be a single-layer film structure, or a stacked structure such as Ti / Al / Ti, Mo / Al / Mo, Mo / AlGe / Mo, Cu / Mo, Cu / Ti, Cu / MoTi or Cu / MoNb.

[0050] The first interlayer insulating layer 1036 is located on the first gate layer 1033. Optionally, the first interlayer insulating layer 1036 includes a silicon compound, a metal oxide, etc. Further, the first interlayer insulating layer 1036 includes at least one of silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, tantalum oxide, hafnium oxide, zirconium oxide, titanium oxide, etc.

[0051] The first source-drain electrode layer 1034 is located on the first interlayer insulating layer 1036, and the first source-drain electrode layer 1034 includes a plurality of source patterns and drain patterns, and the source patterns and the drain patterns are electrically connected to the source region and the drain region of the active pattern, respectively. Optionally, the first source-drain electrode layer 1034 includes at least one of molybdenum (Mo), aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), titanium (Ti), tantalum (Ta), tungsten (W), copper (Cu), etc. Optionally, the first source-drain electrode layer 1034 can be a single-layer film structure, or a stacked structure such as Ti / Al / Ti, Mo / Al / Mo, Mo / AlGe / Mo, Cu / Mo, Cu / Ti, Cu / MoTi or Cu / MoNb.

[0052] Optionally, the substrate 103 further includes a second gate layer and a second gate insulating layer, wherein the second gate insulating layer is located between the second gate layer and the first gate layer 1033 , and the second gate layer is located between the first source-drain electrode layer 1034 and the second gate insulating layer.

[0053] Optionally, the substrate 103 further includes a second interlayer insulating layer and a second source-drain electrode layer, and the second interlayer insulating layer is located between the first source-drain electrode layer 1034 and the second source-drain electrode layer.

[0054] Optionally, the substrate 103 further includes a second active layer, a third gate insulating layer and a third gate layer. The second active layer is located on the first interlayer insulating layer 1036, the third gate insulating layer is located between the second active layer and the third gate layer, and the third gate layer is located between the first source-drain electrode layer 1034 and the third gate insulating layer. The semiconductor materials included in the first active layer 1032 and the second active layer are different. For example, the first active layer 1032 includes a silicon semiconductor material, and the second active layer includes a metal oxide material.

[0055] The substrate 103 further includes a planar layer 1037 , and the planar layer 1037 is located on the first source-drain electrode layer 1034 . Furthermore, the first electrode 1021 and the auxiliary electrode 101 are both located on the planar layer 1037 .

[0056] Optionally, at least one of the first gate layer 1033 , the second gate layer, the third gate layer, the first source and drain layer 1034 , and the second source and drain layer may include the first signal line SL.

[0057] The display panel can be used in transparent display, head-up display and display including sensing function.

[0058] Further, the display panel includes a first display area and a second display area, the first display area includes a plurality of the light-emitting areas 100a and a plurality of the non-light-emitting areas 100b, and the transmittance of the first display area is greater than the transmittance of the second display area. The display panel includes a light sensor arranged corresponding to the first display area. Optionally, the light sensor includes a camera, a fingerprint sensor, a temperature sensor, a distance sensor, etc.

[0059] Optionally, within a unit area, a density of pixel units arranged in the first display area is smaller than a density of pixel units arranged in the second display area.

[0060] The present invention also provides a method for manufacturing a display panel, wherein the display panel comprises a plurality of light-emitting areas and a non-light-emitting area between the plurality of light-emitting areas, wherein the display panel comprises a plurality of pixel units located in the plurality of light-emitting areas, wherein each of the pixel units comprises at least one auxiliary electrode and a plurality of light-emitting devices, wherein at least one of the light-emitting devices comprises a first electrode, a second electrode, a lap electrode, and a light-emitting layer located between the first electrode and the second electrode. The method for manufacturing the display panel comprises the following steps:

[0061] A substrate is provided, and a first electrode and an auxiliary electrode which are spaced apart are prepared on the substrate.

[0062] A pixel definition layer is prepared on the substrate, the first electrode and the auxiliary electrode, and an undercut opening is prepared on the pixel definition layer so that the undercut opening exposes at least a portion of the first electrode and a side surface of the auxiliary electrode opposite to the first electrode.

[0063] A light-emitting layer, a second electrode and a lapped electrode are prepared, wherein the light-emitting layer, the second electrode and the lapped electrode are all located in the light-emitting area and on the pixel definition layer and the first electrode, the lapped electrode is in contact with the side surface of the auxiliary electrode, and the lapped electrode is located on one side of the second electrode in the thickness direction of the display panel.

[0064] The present invention further provides a display device, comprising any one of the above-mentioned driving circuits or any one of the above-mentioned display panels.

[0065] It can be understood that the display device includes a movable display device (such as a laptop computer, a mobile phone, etc.), a fixed terminal (such as a desktop computer, a television, etc.), a measuring device (such as a sports bracelet, a thermometer, etc.), etc.

[0066] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A display panel, characterized in that: The display panel comprises a plurality of light-emitting areas and a non-light-emitting area between the plurality of light-emitting areas, the display panel comprises a plurality of pixel units located in the plurality of light-emitting areas, each of the pixel units comprises at least one auxiliary electrode and a plurality of light-emitting devices, at least one of the light-emitting devices comprises a first electrode, a second electrode, a lap electrode and a light-emitting layer located between the first electrode and the second electrode, the lap electrode being located on one side of the second electrode in the thickness direction of the display panel; the display panel comprises: A substrate, wherein the first electrode and the auxiliary electrode are both located on the substrate, and the first electrode and the auxiliary electrode are spaced apart from each other; a pixel definition layer, located on the substrate and the auxiliary electrode, wherein a portion of the pixel definition layer corresponding to the light-emitting area is provided with an undercut opening, wherein the undercut opening exposes at least a portion of the first electrode and a side surface of the auxiliary electrode opposite to the first electrode; The light-emitting layer, the second electrode and the overlapping electrode are all located in the light-emitting area and on the pixel definition layer and the first electrode, and the overlapping electrode is in contact with the side surface of the auxiliary electrode.

2. The display panel according to claim 1, characterized in that: At least one of the light-emitting areas includes a common area, and the common area is correspondingly surrounded by a plurality of the light-emitting devices included in the pixel unit; The auxiliary electrode is located in the common area, and the bridging electrodes of the plurality of light-emitting devices are in contact with different portions of the side surface of the auxiliary electrode.

3. The display panel according to claim 1, characterized in that: The pixel definition layer includes a first portion located on the auxiliary electrode, an edge of the first portion exceeds the auxiliary electrode, and the first portion and the auxiliary electrode jointly surround the undercut opening.

4. The display panel according to claim 1, characterized in that: The light transmittance of the auxiliary electrode is greater than the light transmittance of the first electrode, and the light transmittance of the second electrode is less than the light transmittance of the overlapping electrode.

5. The display panel according to claim 4, characterized in that: The light transmittance of the second electrode is greater than or equal to 20% and less than or equal to 80%.

6. The display panel according to claim 1, characterized in that: The bonding electrode is located on a side of the second electrode away from the first electrode; or, the second electrode is located on a side of the bonding electrode away from the first electrode.

7. The display panel according to claim 1, characterized in that: The auxiliary electrode includes a first main body portion and a first connecting portion extending from a side of the first main body portion toward the substrate, and the first connecting portion is electrically connected to a first voltage end.

8. The display panel according to claim 7, characterized in that: The substrate comprises: Gate layer; A source-drain electrode layer, located on the gate layer; The gate layer and / or the source-drain layer includes a first signal line, and the first signal line is electrically connected between the first voltage end and the first connection portion.

9. The display panel according to claim 1, characterized in that: The display panel comprises a first display area and a second display area, the first display area comprises a plurality of the light-emitting areas and a plurality of the non-light-emitting areas, and the light transmittance of the first display area is greater than the light transmittance of the second display area; Wherein, the display panel includes a light sensor arranged corresponding to the first display area.

10. A display device, characterized in that: It comprises the display panel as claimed in any one of claims 1 to 9.

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