Display panel and display device

Abstract

The utility model discloses a display panel and a display device, the display panel comprises a substrate, a plurality of sub-pixels and a pixel defining part, a light-emitting element of each sub-pixel comprises a light-emitting functional layer, a first electrode and a second electrode, the first electrodes and the second electrodes are located on the two sides of the light-emitting functional layer, the first electrodes of the adjacent sub-pixels are arranged at intervals, and the second electrodes of the adjacent sub-pixels are arranged at intervals. The plurality of sub-pixels comprise a first sub-pixel and a second sub-pixel which are adjacent to each other; the light-emitting function layer of the first sub-pixel and the light-emitting function layer of the second sub-pixel are arranged at intervals, the distance between the light-emitting area of the first sub-pixel and the light-emitting area of the second sub-pixel is not larger than 10 micrometers, and the second electrode of the first sub-pixel and the second electrode of the second sub-pixel are arranged at intervals. The display panel further comprises a plurality of auxiliary electrodes located on the substrate, the second electrodes of at least part of the sub-pixels are electrically connected through the auxiliary electrodes, the display panel has high pixel density, and the risk of crosstalk between the adjacent sub-pixels can be effectively reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to a display panel and a display device. Background Art

[0002] Organic light-emitting diode (OLED) display products have the advantages of being light, thin, wide viewing angle, foldable, simple production process and low cost. At the same time, they have fast response speed, low energy consumption, low driving voltage, wide operating temperature range and high luminous efficiency.

[0003] At present, OLED display products have become the mainstream display technology of modern times, which can realize active light emission and its light emission color is continuously adjustable. For example, tandem organic light emitting display devices can increase the life and brightness of light emitting devices and reduce the power consumption of light emitting devices by adding at least one light emitting layer and a charge generating layer. Utility Model Content

[0004] At least one embodiment of the present invention provides a display panel and a display device.

[0005] At least one embodiment of the utility model provides a display panel, including a substrate, a plurality of sub-pixels and a pixel defining portion, wherein the plurality of sub-pixels are located on the substrate, the sub-pixels include a light-emitting element, the light-emitting element includes a light-emitting functional layer, and a first electrode and a second electrode located on both sides of the light-emitting functional layer, the first electrode is closer to the substrate than the second electrode, the first electrodes of adjacent sub-pixels are spaced apart from each other, and the plurality of sub-pixels include first sub-pixels and second sub-pixels that are adjacent to each other; the pixel defining portion is located between the light-emitting functional layer and the substrate, the pixel defining portion includes a plurality of openings, the openings are configured to expose at least a portion of the first electrodes of the sub-pixels to define a light-emitting area of ​​the sub-pixels, wherein the light-emitting functional layer of the first sub-pixel and the light-emitting functional layer of the second sub-pixel are spaced apart from each other, the distance between the light-emitting area of ​​the first sub-pixel and the light-emitting area of ​​the second sub-pixel is not greater than 10 μm, the second electrode of the first sub-pixel and the second electrode of the second sub-pixel are spaced apart from each other, and the display panel also includes a plurality of auxiliary electrodes located on the substrate, and at least a portion of the second electrodes of the sub-pixels are electrically connected through the auxiliary electrodes.

[0006] According to the display panel provided by at least one embodiment of the present invention, the orthographic projection of the auxiliary electrode on the base substrate at least partially overlaps with the orthographic projection of the pixel defining portion on the base substrate.

[0007] According to the display panel provided by at least one embodiment of the present utility model, adjacent auxiliary electrodes are arranged to be spaced apart from each other.

[0008] According to the display panel provided by at least one embodiment of the present invention, the plurality of auxiliary electrodes are an integrated structure.

[0009] According to the display panel provided by at least one embodiment of the present utility model, the plurality of auxiliary electrodes include a plurality of first auxiliary electrode parts, a plurality of second auxiliary electrode parts and a plurality of third auxiliary electrode parts, the second electrodes of a part of the plurality of sub-pixels are electrically connected through the first auxiliary electrode parts, the second electrodes of another part of the plurality of sub-pixels are electrically connected through the second auxiliary electrode parts, the second electrodes of another part of the plurality of sub-pixels are electrically connected through the third auxiliary electrode parts, and signals are applied independently to the first auxiliary electrode parts, the second auxiliary electrode parts and the third auxiliary electrode parts.

[0010] According to the display panel provided by at least one embodiment of the present invention, the multiple sub-pixels include a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel that emit light of different colors, the light-emitting functional layer of the first color sub-pixel, the light-emitting functional layer of the second color sub-pixel, and the light-emitting functional layer of the third color sub-pixel are arranged at intervals, and the second electrode of the first color sub-pixel, the second electrode of the second color sub-pixel, and the second electrode of the third color sub-pixel are arranged at intervals.

[0011] According to the display panel provided by at least one embodiment of the present invention, at least part of the second electrodes of the first color sub-pixels are electrically connected through the first auxiliary electrode portion, at least part of the second electrodes of the second color sub-pixels are electrically connected through the second auxiliary electrode portion, and at least part of the second electrodes of the third color sub-pixels are electrically connected through the third auxiliary electrode portion.

[0012] According to the display panel provided by at least one embodiment of the present utility model, the display panel also includes a planar layer, the planar layer is located on the side of the pixel defining portion close to the base substrate, the first auxiliary electrode portion is located between the planar layer and the base substrate, the second auxiliary electrode portion and the third auxiliary electrode portion are both located between the pixel defining portion and the planar layer, the second electrode of the first color sub-pixel is electrically connected to the first auxiliary electrode portion through a first connection hole in the planar layer, the second electrode of the second color sub-pixel is electrically connected to the second auxiliary electrode portion through a second connection hole in the pixel defining portion, and the second electrode of the third color sub-pixel is electrically connected to the third auxiliary electrode portion through a third connection hole in the pixel defining portion.

[0013] According to the display panel provided by at least one embodiment of the present invention, the auxiliary electrode is located on a side of the pixel defining portion away from the base substrate, and the second electrodes of at least some of the sub-pixels are in contact with the auxiliary electrode to be electrically connected.

[0014] According to the display panel provided by at least one embodiment of the present invention, the display panel also includes an insulating pattern, which is located on a side of the pixel defining portion away from the base substrate, and at least a portion of the insulating pattern is located between the light-emitting functional layer of any one sub-pixel in the at least part of the sub-pixels and the auxiliary electrode, so that the auxiliary electrode and the light-emitting functional layer of the sub-pixel are insulated from each other.

[0015] According to the display panel provided by at least one embodiment of the present invention, the distance between the light-emitting functional layer of the sub-pixel and the auxiliary electrode is 2 μm to 4 μm.

[0016] According to the display panel provided by at least one embodiment of the present invention, the surface of the auxiliary electrode close to the base substrate is in contact with the pixel defining portion, and the surface of the auxiliary electrode away from the pixel defining portion is farther away from the base substrate than the surface of the second electrode away from the pixel defining portion.

[0017] According to the display panel provided by at least one embodiment of the present invention, the auxiliary electrode is partially covered by the pixel defining portion, and the second electrode of any sub-pixel in at least some of the sub-pixels is electrically connected to the auxiliary electrode through a via hole in the pixel defining portion.

[0018] According to the display panel provided by at least one embodiment of the present invention, the display panel also includes a planar layer, the planar layer is located on a side of the pixel defining portion close to the base substrate, the auxiliary electrode is partially covered by the planar layer, and the second electrode of any sub-pixel in at least some of the sub-pixels is electrically connected to the auxiliary electrode through a via hole in the planar layer.

[0019] According to the display panel provided by at least one embodiment of the present utility model, the multiple sub-pixels also include a third sub-pixel, the light-emitting function layer of the third sub-pixel, the light-emitting function layer of the first sub-pixel and the light-emitting function layer of the second sub-pixel are arranged at intervals, the second electrode of the third sub-pixel, the second electrode of the first sub-pixel and the second electrode of the second sub-pixel are arranged at intervals, the first sub-pixel, the second sub-pixel and the third sub-pixel constitute a pixel unit, the second sub-pixel and the third sub-pixel in the pixel unit are located on the same side of the first sub-pixel, the display panel includes a plurality of pixel units, and the plurality of pixel units are arranged in an array on the substrate to form a plurality of pixel unit columns arranged in a first direction and a plurality of pixel unit rows arranged in the second direction, wherein the plurality of first sub-pixels in the pixel unit column are arranged in sequence at intervals in the second direction, and the plurality of second sub-pixels and the plurality of third sub-pixels in the pixel unit column are arranged alternately in the second direction.

[0020] According to the display panel provided by at least one embodiment of the present utility model, the plurality of auxiliary electrodes include a plurality of first sub-auxiliary electrodes and second sub-auxiliary electrodes, the first sub-auxiliary electrodes extend along the second direction, the second sub-auxiliary electrodes extend along the first direction, the plurality of first sub-auxiliary electrodes are all connected to the second sub-auxiliary electrodes, the first sub-auxiliary electrodes are located between the first sub-pixel and the third sub-pixel, and the second electrodes of the sub-pixels in the pixel unit column are connected to the same first sub-auxiliary electrode.

[0021] According to the display panel provided by at least one embodiment of the present invention, the auxiliary electrode between adjacent sub-pixels in at least a portion of the sub-pixels has a rectangular, trapezoidal or elliptical cross-section along a plane, and the plane is perpendicular to the substrate and parallel to the direction of the line connecting the geometric centers of the adjacent sub-pixels; and / or the size of the auxiliary electrode in a direction perpendicular to the substrate is 1μm to 2μm.

[0022] According to the display panel provided by at least one embodiment of the present invention, the orthographic projection of the auxiliary electrode on the base substrate is a rectangle, and the side length of the rectangle is 17 μm to 20 μm.

[0023] According to the display panel provided by at least one embodiment of the present invention, the light-emitting functional layer of the sub-pixel includes a first light-emitting layer, a first charge generating layer and a second light-emitting layer stacked in a direction perpendicular to the base substrate, the first charge generating layer is located between the first light-emitting layer and the second light-emitting layer, the first light-emitting layer is farther away from the base substrate than the second light-emitting layer, and the distance between the first charge generating layer of the first sub-pixel and the first charge generating layer of the adjacent second sub-pixel is 18.0μm to 21.5μm.

[0024] According to the display panel provided by at least one embodiment of the present invention, the first charge generation layer includes a first host material and a first doping material, and the mass percentage of the first doping material in the first charge generation layer is 12% to 18%.

[0025] According to the display panel provided by at least one embodiment of the present invention, the mass percentages of the first doping material in the first charge generation layer of sub-pixels emitting light of different colors are different.

[0026] According to the display panel provided by at least one embodiment of the present invention, the first host material in the first charge generation layer includes a triaromatic amine compound, and the first doping material includes a lithium quinoline complex.

[0027] According to the display panel provided by at least one embodiment of the present utility model, the light-emitting area of ​​the first sub-pixel has an orthographic projection on the base substrate in a first rectangle, the first charge generating layer of the first sub-pixel has an orthographic projection on the base substrate in a second rectangle, the first rectangle falls into the second rectangle, the width of the first rectangle is not less than 14 μm, the length of the first rectangle is not less than 50 μm, the width of the second rectangle is 14.5 μm to 17.0 μm, and the length of the second rectangle is 52 μm to 60 μm.

[0028] According to the display panel provided by at least one embodiment of the present invention, the light-emitting functional layer of the sub-pixel also includes a second charge generating layer, the second charge generating layer is located between the first charge generating layer and the second light-emitting layer, the second charge generating layer includes a second main material and a second doping material, and the mass percentage of the second doping material in the second charge generating layer of the first sub-pixel is 3% to 6%.

[0029] According to the display panel provided by at least one embodiment of the present invention, the second host material includes 1,2,4-triazole, and the second doping material includes lithium, beryllium or boron.

[0030] According to the display panel provided by at least one embodiment of the present invention, the first color sub-pixel has a first pixel opening ratio, the second color sub-pixel has a second pixel opening ratio, and the third color sub-pixel has a third pixel opening ratio, and the first pixel opening ratio is greater than the second pixel opening ratio, and the second pixel opening ratio is greater than the third pixel opening ratio.

[0031] According to the display panel provided by at least one embodiment of the present invention, the second pixel opening ratio is 1.4 to 1.8 times the third pixel opening ratio, and the first pixel opening ratio is 1.69 to 2.80 times the third pixel opening ratio; and / or the first pixel opening ratio, the second pixel opening ratio and the third pixel opening ratio are all 45% to 65%.

[0032] According to the display panel provided by at least one embodiment of the present invention, the light-emitting functional layer also includes a hole injection layer, a second hole transport layer, a second hole blocking layer, a second electron transport layer, a first hole transport layer, a first hole blocking layer, a first electron transport layer and an electron injection layer stacked in a direction perpendicular to the base substrate, the display panel also includes a light extraction layer and a buffer layer, wherein the first hole transport layer is located between the first light-emitting layer and the first charge generating layer, the first hole blocking layer, the first electron transport layer and the electron injection layer are located between the first light-emitting layer and the second electrode, the first electron transport layer is located between the first hole blocking layer and the electron injection layer, and the first hole blocking layer is closer to the base substrate than the first electron transport layer, and the hole injection layer and the second hole blocking layer are closer to the base substrate than the first electron transport layer. The hole transport layer is located on the side of the second light-emitting layer close to the substrate, the hole injection layer is closer to the substrate than the second hole transport layer, the second hole blocking layer and the second electron transport layer are located between the second light-emitting layer and the second charge generating layer, the second hole blocking layer is closer to the second light-emitting layer than the second electron transport layer, the light extraction layer and the buffer layer are located on the side of the second electrode away from the substrate, the light extraction layer is closer to the substrate than the buffer layer, the first light-emitting layer of the sub-pixel includes a first sub-light-emitting layer and a first adjustment layer, the first sub-light-emitting layer is farther from the substrate than the first adjustment layer, the second light-emitting layer of the sub-pixel includes a second sub-light-emitting layer and a second adjustment layer, the second sub-light-emitting layer is farther from the substrate than the second adjustment layer.

[0033] According to the display panel provided by at least one embodiment of the present invention, the thickness of the hole injection layer of the sub-pixel is 100-200 angstroms, the thickness of the first hole transport layer and the second hole transport layer are both 300-700 angstroms, the thickness of the first charge generation layer is 500-700 angstroms, the thickness of the second charge generation layer is 100-300 angstroms, the thickness of the first hole blocking layer and the second hole blocking layer are both 50-150 angstroms, the thickness of the first electron transport layer and the second electron transport layer are both 300-400 angstroms, the thickness of the second electrode is 100-300 angstroms, the thickness of the electron injection layer is 10-30 angstroms, the thickness of the light extraction layer is 700-1200 angstroms, and the buffer layer is 100-1500 angstroms. The thickness is 600-900 angstroms, and the multiple sub-pixels of the display panel include a first color sub-pixel, a second color sub-pixel and a third color sub-pixel that emit light of different colors. The thickness of the first sub-light-emitting layer, the second sub-light-emitting layer, the first adjustment layer and the second adjustment layer of the first color sub-pixel are all 100-200 angstroms; the thickness of the first sub-light-emitting layer and the second sub-light-emitting layer of the second color sub-pixel are both 100-300 angstroms, and the thickness of the first adjustment layer and the second adjustment layer of the second color sub-pixel are both 300-500 angstroms; the thickness of the first sub-light-emitting layer and the second sub-light-emitting layer of the third color sub-pixel are both 300-500 angstroms, and the thickness of the first adjustment layer and the second adjustment layer of the third color sub-pixel are both 500-700 angstroms.

[0034] At least one embodiment of the present invention further provides a display device, comprising the display panel provided by any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0036] Figure 1 A partial cross-sectional schematic diagram of a display panel provided in at least one embodiment of the present utility model.

[0037] Figure 2 A schematic diagram of a partial structure of a display panel provided in at least one embodiment of the present utility model.

[0038] Figure 3A for Figure 1 A plan view of a display panel is shown.

[0039] Figure 3B for Figure 3A Schematic diagram of the local structure of the display panel.

[0040] Figure 3C for Figure 3A A schematic diagram of the local structure of a pixel unit in a display panel.

[0041] Figure 3D for Figure 1 Schematic diagram of the distribution of the brightness attenuation ratio of the display panel.

[0042] Figure 4 for Figure 1 An enlarged schematic diagram of the local structure of the display panel.

[0043] Figure 5A A partial cross-sectional schematic diagram of another display panel provided for at least one embodiment of the utility model.

[0044] Figure 5B for Figure 5A An enlarged schematic diagram of the local structure of the display panel.

[0045] Figure 6 A partial cross-sectional schematic diagram of yet another display panel provided for at least one embodiment of the present utility model.

[0046] Figure 7 A partial cross-sectional schematic diagram of yet another display panel provided for at least one embodiment of the present utility model.

[0047] Figure 8 A partial cross-sectional schematic diagram of yet another display panel provided for at least one embodiment of the present utility model.

[0048] Fig. 9 for Figure 1 Another schematic plan view of a display panel is shown.

[0049] Fig.10 for Fig. 9 An enlarged schematic diagram of the auxiliary electrode in FIG.

[0050] Fig.11 A schematic plan view of yet another display panel provided for at least one embodiment of the present utility model.

[0051] Fig.12 for Fig.11 Schematic diagram of a partial cross-section of the display panel.

[0052] Fig.13 A schematic plan view of yet another display panel provided for at least one embodiment of the present utility model.

[0053] Fig.14 A schematic plan view of yet another display panel provided for at least one embodiment of the present utility model.

[0054] Fig.15 A schematic diagram of the structure of a display panel.

[0055] Fig.16 for Fig.15 Schematic diagram of the color gamut distribution of the display panel.

[0056] Fig.17 for Fig.15 Schematic diagram of the spectral curve distribution of the display panel.

[0057] Fig.18 A schematic diagram of the structure of another display panel.

[0058] Fig.19 for Fig.18 Schematic diagram of the color gamut distribution of the display panel.

[0059] Fig. 20 for Fig.18 Schematic diagram of the spectral curve distribution of the display panel.

[0060] Fig.21 for Fig.18 Schematic diagram of the distribution of the brightness attenuation ratio of the display panel.

[0061] Fig. 22 FIG. 4 is a schematic diagram of the structure of another display panel.

[0062] Fig.23 for Fig. 22 Schematic diagram of the color gamut distribution of the display panel.

[0063] Fig.24 for Fig. 22 Schematic diagram of the spectral curve distribution of the display panel.

[0064] Figure 25 to Figure 32 For the corresponding Fig.18 A structural schematic diagram of the manufacturing process of the display panel shown.

[0065] Figure 33 to Figure 43 A structural schematic diagram of a manufacturing process of a display panel provided by at least one embodiment of the present utility model.

[0066] Figures 44 to 46 A structural schematic diagram of another display panel manufacturing process provided for at least one embodiment of the present utility model. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0068] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0069] The features such as "parallel", "perpendicular" and "same" used in the embodiments of the present invention include the features such as "parallel", "perpendicular", "same" in a strict sense, as well as the cases where "approximately parallel", "approximately perpendicular", "approximately the same" and the like contain certain errors, taking into account the errors associated with the measurement of specific quantities (for example, the limitations of the measurement system), and are expressed as within the acceptable deviation range for a specific value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of the value. When the number of a component is not specifically indicated in the following of the embodiments of the present invention, it means that the component can be one or more, or can be understood as at least one. "At least one" refers to one or more, and "plurality" refers to at least two.

[0070] Generally, OLED display products can be manufactured using a vacuum evaporation process. However, since this process requires the use of a high-precision metal mask (FMM), the pixel density of the display product is limited, for example, to only about 500. Therefore, the resolution of OLED display products needs to be improved.

[0071] For example, the light-emitting functional layer of an OLED display product (such as a tandem device) includes a plurality of film layers stacked, such as a hole transport layer (HTL), a charge generation layer (CGL), and an electron transport layer (ETL), etc., which are used as common film layers. In some display panels, in order to improve the luminous efficiency, the light-emitting functional layers of sub-pixels with different luminous colors can use different organic materials to improve the electron mobility or hole mobility. For example, the light-emitting functional layers of red sub-pixels and green sub-pixels use phosphorescent materials, and the light-emitting functional layers of blue sub-pixels use fluorescent materials, which will cause the turn-on voltages of red sub-pixels and green sub-pixels to be different from the turn-on voltage of blue sub-pixels. For example, in some display panels, the turn-on voltage of the blue sub-pixel is greater than the turn-on voltage of the green sub-pixel, and the turn-on voltage of the green sub-pixel is greater than the turn-on voltage of the red sub-pixel. Therefore, when the display product is displayed, lateral electron or hole transmission occurs between the light-emitting elements of sub-pixels of different colors between different sub-pixels, and color crosstalk is prone to occur. For example, when the red and blue sub-pixels are controlled to emit light, the green sub-pixel also emits light due to the lateral migration of charges, which causes the light output color of the monochrome sub-pixel to be impure, resulting in a low color gamut of the display panel and poor display effect.

[0072] At least one embodiment of the present invention provides a display panel and a display device.

[0073] At least one embodiment of the utility model provides a display panel, including a substrate, a plurality of sub-pixels and a pixel defining portion, wherein the plurality of sub-pixels are located on the substrate, the sub-pixels include a light-emitting element, the light-emitting element includes a light-emitting functional layer, and a first electrode and a second electrode located on both sides of the light-emitting functional layer, the first electrode is closer to the substrate than the second electrode, the first electrodes of adjacent sub-pixels are spaced apart from each other, and the plurality of sub-pixels include first sub-pixels and second sub-pixels that are adjacent to each other; the pixel defining portion is located between the light-emitting functional layer and the substrate, the pixel defining portion includes a plurality of openings, the openings are configured to expose at least part of the first electrodes of the sub-pixels to define the light-emitting areas of the sub-pixels, wherein the light-emitting functional layers of the first sub-pixel and the light-emitting functional layers of the second sub-pixel are spaced apart from each other, the distance between the light-emitting areas of the first sub-pixel and the light-emitting areas of the second sub-pixel is not greater than 10 μm, the second electrodes of the first sub-pixel and the second electrodes of the second sub-pixel are spaced apart from each other, and the display panel also includes a plurality of auxiliary electrodes located on the substrate, and the second electrodes of at least some of the sub-pixels are electrically connected through the auxiliary electrodes.

[0074] In the display panel provided by the embodiment of the utility model, the light-emitting functional layer of the first sub-pixel and the light-emitting functional layer of the second sub-pixel are spaced from each other, thereby effectively reducing the risk of crosstalk between the first sub-pixel and the second sub-pixel; at the same time, the second electrode of the first sub-pixel and the second electrode of the second sub-pixel are spaced from each other, which is conducive to simplifying the manufacturing process of the first sub-pixel and the second sub-pixel, and the second electrodes of at least some of the sub-pixels are electrically connected through the auxiliary electrode, thereby ensuring the signal continuity between the second electrodes of multiple sub-pixels; in addition, the distance between the light-emitting area of ​​the first sub-pixel and the light-emitting area of ​​the second sub-pixel is not greater than 10μm, so that the pixel density of the display panel is relatively high, which can improve the clarity of the displayed picture and have good display quality.

[0075] The display panel and the display device provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0076] Figure 1 A partial cross-sectional schematic diagram of a display panel provided by at least one embodiment of the utility model; Figure 2 A schematic diagram of a partial structure of a display panel provided by at least one embodiment of the utility model; Figure 3A for Figure 1 A plan view of a display panel is shown.

[0077] like Figure 1 As shown, the display panel 10 includes a substrate 100 and a plurality of sub-pixels 200 located on the substrate 100. For example, the sub-pixel 200 includes a light-emitting element 300, the light-emitting element 300 includes a light-emitting functional layer 310, and a first electrode 410 and a second electrode 420 located on both sides of the light-emitting functional layer 310, and the first electrode 410 is closer to the substrate 100 than the second electrode 420. For example, the first electrode 410, the light-emitting functional layer 310 and the second electrode 420 are sequentially stacked on the substrate 100. For example, each sub-pixel 200 in the display panel 10 includes a light-emitting element 300, for example, the light-emitting element 300 may be an organic light-emitting element, but is not limited thereto.

[0078] For example, Figure 3A As shown, the plurality of sub-pixels 200 may be arranged in an array according to a first direction X and a second direction Y, wherein the first direction X intersects with the second direction Y and is parallel to the substrate. For example, the first direction X may be perpendicular to the second direction Y. Figure 1 As shown, the third direction Z represents a direction perpendicular to the base substrate 100 .

[0079] like Figure 2As shown, in the third direction Z, the light-emitting functional layer is located between the first electrode 410 and the second electrode 420, and the light-emitting functional layer 310 includes a plurality of film layers, such as a hole injection layer HIL, a second hole transport layer HTL-2, a second light-emitting layer U2, a second hole blocking layer HBL-2, a second electron transport layer ETL-2, a second charge generating layer 352, a first charge generating layer 351, a first hole transport layer HTL-1, a first light-emitting layer U1, a first hole blocking layer HBL-1, a first electron transport layer ETL-1 and an electron injection layer Yb, which are sequentially stacked along the third direction Z and in a direction from the first electrode 410 to the second electrode 420.

[0080] For example, Figure 2 As shown, the first charge generation layer 351 and the second charge generation layer 352 have strong conductivity, which can make the light-emitting functional layer 310 have the advantages of long life, low power consumption and high brightness. For example, compared with the light-emitting functional layer without the first charge generation layer 351 and the second charge generation layer 352, the first charge generation layer 351 and the second charge generation layer 352 are provided in the light-emitting functional layer 310, which can effectively improve the light-emitting brightness of the light-emitting element 300. For example, Figure 2 The light emitting element 300 shown may be a tandem light emitting element.

[0081] For example, Figure 2 As shown, the first charge generation layer 351 may be a p-type charge generation layer, and the second charge generation layer 352 may be an n-type charge generation layer, and the first charge generation layer 351 and the second charge generation layer 352 have a high charge mobility. For example, the first electrode 410 may be an anode, and the second electrode 420 may be a cathode. For example, the cathode may be formed of a material with high conductivity and low work function, for example, the cathode may be made of a metal material. For example, the anode may be formed of a transparent conductive material with a high work function, and the embodiments of the utility model are not limited to this.

[0082] like Figure 1As shown, in some examples, the display panel 10 further includes a pixel defining portion 550 located between the light emitting functional layer 310 and the base substrate 100, the pixel defining portion 550 includes a plurality of openings 510, and the openings 510 are configured to expose at least a portion of the first electrode 410 of the sub-pixel 200 to define a light emitting region of the sub-pixel 200. For example, one sub-pixel 200 may correspond to one opening 510. For example, when the light emitting functional layer 310 is formed in the opening 510 of the pixel defining portion 550, the first electrode 410 and the second electrode 420 located on both sides of the light emitting functional layer 310 can drive the light emitting functional layer 310 in the opening 510 to emit light. For example, the light emitting region of the above-mentioned sub-pixel 200 may refer to an effective light emitting region of the sub-pixel 200, and the shape of the light emitting region refers to a two-dimensional shape, for example, the shape of the light emitting region may be the same as the shape of the opening 510 of the pixel defining portion 550.

[0083] like Figure 1 As shown, at least part of the pixel defining portion 550 is located between the first electrodes 410 of adjacent sub-pixels 200, so that the first electrodes 410 of adjacent sub-pixels 200 are arranged at intervals from each other. The plurality of sub-pixels 200 include a first sub-pixel 210 and a second sub-pixel 220, the light-emitting function layer 310 of the first sub-pixel 210 and the light-emitting function layer 310 of the second sub-pixel 220 are arranged at intervals from each other, and the light-emitting function layer 310 of the first sub-pixel 210 and the light-emitting function layer 310 of the second sub-pixel 220 are disconnected from each other and independent of each other. For example, in an embodiment of the utility model, the light-emitting function layer 310 of the sub-pixel 200 can be patterned by a photolithography process. Thus, the risk of lateral electron transmission and hole transmission between the first sub-pixel 210 and the second sub-pixel 220 can be effectively reduced, thereby reducing the crosstalk phenomenon. For example, the light-emitting color of the first sub-pixel 210 can be different from the light-emitting color of the second sub-pixel 220, but is not limited thereto. For example, the luminous color of the first sub-pixel 210 may also be the same as the luminous color of the second sub-pixel 220 , which is not limited in the embodiment of the present invention.

[0084] like Figure 1 As shown, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are spaced apart from each other, thereby reducing the difficulty of manufacturing the first sub-pixel 210 and the second sub-pixel 220. For example, the second electrode 420 can be formed by a photolithography process (please refer to the relevant description in the following embodiments), and the composition process can be performed without using a fine mask plate, so that it can be suitable for large-scale production.

[0085] like Figure 1As shown, the display panel 10 further includes an auxiliary electrode 600 located on the base substrate 100, and the second electrodes 420 of at least some of the sub-pixels 200 are electrically connected through the auxiliary electrode 600. For example, the second electrode 420 of the first sub-pixel 210 can be electrically connected to the second electrode 420 of the second sub-pixel 220 through the auxiliary electrode 600. For example, in all the sub-pixels 200 in the display panel 10, two adjacent sub-pixels 200 are electrically connected through the auxiliary electrode 600.

[0086] For example, Figure 1 As shown, the auxiliary electrode 600 can be made of a conductive material, for example, the auxiliary electrode 600 and the second electrode 420 can be made of the same material, but not limited thereto. For example, the auxiliary electrode 600 can include a stacked structure formed by a molybdenum metal layer, a copper metal layer, a titanium metal layer, an aluminum metal layer and a titanium metal layer, or a stacked structure formed by an indium tin oxide layer, a silver metal layer and an indium tin oxide layer, so that the resistance can be low, which is conducive to increasing the transmission current. Thus, the setting of the auxiliary electrode 600 can make the second electrodes 420 of the multiple sub-pixels 200 connected thereto have continuity, so as to facilitate the synchronous application of control signals.

[0087] For example, Figure 3A As shown, the plurality of sub-pixels 200 in the display panel 10 further include a third sub-pixel 230, the light-emitting function layer 310 of the third sub-pixel 230 and the light-emitting function layer 310 of the first sub-pixel 210 are arranged at intervals from each other, and the light-emitting function layer 310 of the third sub-pixel 230 and the light-emitting function layer 310 of the second sub-pixel 220 are arranged at intervals from each other. The second electrode 420 of the third sub-pixel 230 and the second electrode 420 of the first sub-pixel 210 are arranged at intervals from each other, and the second electrode 420 of the third sub-pixel 230 and the second electrode 420 of the second sub-pixel 220 are arranged at intervals from each other. For example, the light-emitting color of the third sub-pixel 230 is different from the light-emitting color of the first sub-pixel 210 and the light-emitting color of the second sub-pixel 220, but is not limited thereto. For example, the light-emitting color of the third sub-pixel 230 may be the same as the light-emitting color of at least one of the first sub-pixel 210 and the second sub-pixel 220, and the embodiment of the utility model is not limited thereto.

[0088] For example, Figure 3A As shown, a plurality of first sub-pixels 210 and a plurality of second sub-pixels 220 are arranged alternately in the first direction X, and a plurality of second sub-pixels 220 and a plurality of third sub-pixels 230 are arranged alternately in the second direction Y. For example, Figure 3AThe light-emitting areas of the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 are schematically shown. In the first direction X, the distance L between the light-emitting area of ​​the first sub-pixel 210 and the light-emitting area of ​​the second sub-pixel 220 is not greater than 10μm, for example, it can be 5μm, 6μm, 7μm, 8μm or 9μm.

[0089] With such an arrangement, the first sub-pixel and the second sub-pixel can be closely arranged in the first direction X, so that the pixel density in the display panel is higher, thereby improving the clarity of the displayed image to have good display quality.

[0090] The display panel provided by the embodiment of the utility model can effectively reduce the risk of crosstalk between the first sub-pixel and the second sub-pixel, and is conducive to simplifying the manufacturing process of the first sub-pixel and the second sub-pixel; the second electrodes of at least some of the sub-pixels are electrically connected by using auxiliary electrodes, thereby ensuring the signal continuity between the second electrodes of multiple sub-pixels. At the same time, the pixel density of the display panel is relatively high, which can improve the clarity of the displayed picture to have good display quality.

[0091] Figure 3B for Figure 3A A schematic diagram of a partial structure of a display panel in FIG. Figure 3C for Figure 3A A schematic diagram of the local structure of a pixel unit in a display panel.

[0092] For example, Figure 1 and Figure 3B As shown, there is a pixel defining portion 550 between the first electrodes 410 of adjacent sub-pixels 200, and the orthographic projection of the auxiliary electrode 600 on the base substrate 100 at least partially overlaps with the orthographic projection of the pixel defining portion 550 on the base substrate 100. For example, Figure 1 The auxiliary electrode 600 is located on the side of the pixel defining portion 550 away from the base substrate 100 , but the embodiments of the present invention are not limited thereto. In some embodiments, the auxiliary electrode 600 may also be located on the side of the pixel defining portion 550 close to the base substrate 100 .

[0093] For example, Figure 3AAs shown, the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 constitute a pixel unit 123, and in the pixel unit 123, the second sub-pixel 220 and the third sub-pixel 230 are located on the same side of the first sub-pixel 210. For example, the orthographic projections of the light-emitting regions of the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 on the substrate are all rectangular, the orthographic projection area of ​​the light-emitting region of the third sub-pixel 230 on the substrate is smaller than the orthographic projection area of ​​the light-emitting region of the second sub-pixel 220 on the substrate, and the orthographic projection area of ​​the light-emitting region of the second sub-pixel 220 on the substrate is smaller than the orthographic projection area of ​​the light-emitting region of the first sub-pixel 210 on the substrate.

[0094] like Figure 3A As shown, the display panel 10 includes a plurality of pixel units 123, which are arranged in an array on a substrate to form a plurality of pixel unit columns 1231 arranged in a first direction X and a plurality of pixel unit rows 1232 arranged in a second direction Y. A plurality of first sub-pixels 210 in the pixel unit column 1231 are arranged in sequence in the second direction Y, and a plurality of second sub-pixels 220 and a plurality of third sub-pixels 230 in the pixel unit column 1231 are arranged alternately in the second direction Y.

[0095] For example, Figure 1 As shown, the auxiliary electrode 600 is located on a side of the pixel defining portion 550 away from the base substrate 100, and the second electrode 420 of at least part of the sub-pixels 200 is in contact with the auxiliary electrode 600 to be electrically connected. Figure 1 As shown, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are respectively located on both sides of the auxiliary electrode 600, and the second electrode 420 of the first sub-pixel 210 contacts the side wall of the auxiliary electrode 600 to be electrically connected, and the second electrode 420 of the second sub-pixel 220 contacts the other side wall of the auxiliary electrode 600 to be electrically connected, so that the second electrode 420 of the first sub-pixel 210 is electrically connected to the second electrode 420 of the second sub-pixel 220. Similarly, the second electrode 420 of the second sub-pixel 220 and the second electrode 420 of the third sub-pixel 230 contact the side wall of the auxiliary electrode 600 to be electrically connected. This connection method is conducive to simplifying the connection structure between the second electrode 420 of the sub-pixel 200 and the auxiliary electrode 600, and is conducive to making the second electrode 420 of the sub-pixel 200 and the auxiliary electrode 600 have a higher electrical signal transmission efficiency.

[0096] For example, Figure 1As shown, the display panel 10 further includes an insulating pattern 800, which is located on a side of the pixel defining portion 550 away from the base substrate 100, and at least a portion of the insulating pattern 800 is located between the light-emitting functional layer 310 of any one of at least some of the sub-pixels 200 and the auxiliary electrode 600, so that the auxiliary electrode 600 and the light-emitting functional layer 310 of the sub-pixel 200 are insulated from each other. For example, at least a portion of the insulating pattern 800 is coated on the sidewall of the auxiliary electrode 600, so that the light-emitting functional layers 310 of adjacent sub-pixels 200 (for example, the first sub-pixel 210 and the second sub-pixel 220, or the second sub-pixel 220 and the third sub-pixel 230) do not contact each other, so as to reduce the risk of crosstalk caused by electron migration between the light-emitting functional layers 310 of adjacent sub-pixels 200. For example, the insulating pattern 800 can be coated on the sidewall of the auxiliary electrode 600 along the circumference thereof to have a good insulating effect.

[0097] For example, Figure 1 As shown, the second electrode 420 of the first sub-pixel 210 is electrically connected to the second electrode 420 of the second sub-pixel 220 through the auxiliary electrode 600, and the second electrode 420 of the third sub-pixel 230 is electrically connected to the second electrode 420 of the second sub-pixel 220 through the auxiliary electrode 600. The distance M1 between the light-emitting functional layer 310 of at least one of the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 and the auxiliary electrode 600 is 2μm to 4μm, for example, 2μm, 3μm or 4μm. In this way, it can be ensured that the light-emitting functional layers 310 of adjacent sub-pixels 200 can be well separated to reduce the risk of crosstalk.

[0098] For example, Figure 1 As shown, the insulating pattern 800 may be made of urea-formaldehyde resin, aniline formaldehyde resin, melamine formaldehyde resin, glycerol resin, polyvinyl chloride, polyethylene, polytetrafluoroethylene, chloroprene rubber, polyvinyl acetal, polyimide, polyamide-imide, polyimide, polymaleimide or polydiphenylene oxide, but is not limited thereto. For example, the thickness of the insulating pattern 800 may be 2 μm to 4 μm, for example, 2 μm, 3 μm or 4 μm. For example, the insulating pattern 800 has an opening size M3 in the first direction X, and M3 is less than 18 μm, for example, 5 μm, 9 μm, 13 μm, 15 μm, or 18 μm.

[0099] For example, Figure 1As shown, a surface 601 of the auxiliary electrode 600 close to the base substrate 100 contacts the pixel defining portion 550. For example, in the third direction Z, the surfaces of the auxiliary electrode 600 and the pixel defining portion 550 facing each other are attached to each other. For example, the auxiliary electrode 600 is made before the insulating pattern 800 is formed, so that the auxiliary electrode 600 can be stably disposed on the pixel defining portion 550 to ensure the reliability of the electrical connection between the second electrodes 420 of the plurality of sub-pixels 200.

[0100] For example, Figure 1 As shown, the surface 602 of the auxiliary electrode 600 away from the pixel defining portion 550 is further away from the base substrate 100 than the surface 401 of the second electrode 420 away from the pixel defining portion 550. That is, in the second direction Y, the surface 602 of the auxiliary electrode 600 away from the pixel defining portion 550 is not covered by the second electrode 420, so that the second electrode 420 of the adjacent sub-pixel 200 can fully contact the side wall of the auxiliary electrode 600 to form a stable electrical connection.

[0101] For example, Figure 1 As shown, the auxiliary electrode 600 can be used as a support pad for the display panel 10, and can be made of metal material, alloy material or inorganic material. For example, the auxiliary electrode 600 is disposed on the pixel defining portion 550 between adjacent sub-pixels 200, but is not limited thereto. For example, the height H of the auxiliary electrode 600 in the second direction Y is 1 μm to 2 μm, for example, 1 μm, 1.5 μm or 2 μm, so that the display panel 10 has good strength and effectively improves the mechanical resistance of the display panel 10.

[0102] Figure 4 for Figure 1 An enlarged schematic diagram of the local structure of the display panel.

[0103] For example, Figure 1 and Figure 4 As shown, the first sub-pixel 210 and the second sub-pixel 220 are adjacent sub-pixels, and the cross section of the auxiliary electrode 600 between the first sub-pixel 210 and the second sub-pixel 220 along a plane is rectangular, and the plane is perpendicular to the base substrate 100 and parallel to the direction of the line connecting the geometric centers of the first sub-pixel 210 and the second sub-pixel 220. Similarly, the cross section of the auxiliary electrode 600 between the second sub-pixel 220 and the third sub-pixel 230 along a plane is also rectangular, and the plane is perpendicular to the base substrate 100 and parallel to the direction of the line connecting the geometric centers of the second sub-pixel 220 and the third sub-pixel 230.

[0104] Figure 5A A partial cross-sectional schematic diagram of another display panel provided for at least one embodiment of the utility model; Figure 5Bfor Figure 5A An enlarged schematic diagram of the local structure of the display panel.

[0105] For example, Figure 5A As shown, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected through an auxiliary electrode 600, and the auxiliary electrode 600 has a trapezoidal cross section along a plane perpendicular to the substrate and parallel to the center line between the first sub-pixel 210 and the second sub-pixel 220. Figure 5A and Figure 5B As shown, in the first direction X, the size of the upper base of the trapezoid is smaller than the size of the lower base, and the upper base is farther away from the pixel defining portion 550 than the lower base, thereby allowing at least a portion of the insulating pattern 800 to be fully filled between the light-emitting functional layer 310 and the auxiliary electrode 600, so that the light-emitting functional layer 310 and the auxiliary electrode 600 are insulated from each other.

[0106] Figure 6 A partial cross-sectional schematic diagram of yet another display panel provided for at least one embodiment of the present utility model.

[0107] For example, Figure 6 As shown, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected through the auxiliary electrode 600, and the cross section of the auxiliary electrode 600 along the plane perpendicular to the base substrate and parallel to the center line between the first sub-pixel 210 and the second sub-pixel 220 is trapezoidal, and the upper base of the trapezoid is closer to the pixel defining portion 550 than the lower base. In this way, it is not easy for the light-emitting functional layer 310 to cross the edge of the surface of the auxiliary electrode 600 away from the base substrate, thereby having a certain blocking effect on it, so as to reduce the risk of crosstalk.

[0108] In some embodiments, the cross section of the auxiliary electrode along a plane perpendicular to the base substrate and parallel to the center line between adjacent sub-pixels may also be in an elliptical shape or other shapes, which is not limited in the embodiments of the present invention.

[0109] Figure 7 A partial cross-sectional schematic diagram of yet another display panel provided for at least one embodiment of the present utility model.

[0110] For example, Figure 7 As shown, the display panel 20 and Figure 1 The difference between the display panel 10 shown is that the position and connection method of the auxiliary electrode 600 are different. The remaining structure can refer to the above embodiment about Figure 1 The relevant description is not repeated here.

[0111] For example, Figure 7As shown, the display panel 20 includes a first sub-pixel 210 and a second sub-pixel 220 adjacent to each other, and the auxiliary electrode 600 is located between the first sub-pixel 210 and the second sub-pixel 220, and is partially covered by the pixel defining portion 550. The second electrode 420 of the first sub-pixel 210 is electrically connected to the auxiliary electrode 600 through the via hole N10 in the pixel defining portion 550, and the second electrode 420 of the second sub-pixel 220 is also electrically connected to the auxiliary electrode 600 through the via hole N10 in the pixel defining portion 550. For example, a portion of the second electrode 420 of the first sub-pixel 210 extends into the via hole N10 and extends along the side wall of the via hole N10 until it contacts the auxiliary electrode 600. A portion of the second electrode 420 of the second sub-pixel 220 extends into the via hole N10 and extends along the side wall of the via hole N10 until it contacts the auxiliary electrode 600, thereby electrically connecting the second electrode 420 of the first sub-pixel 210 to the second electrode 420 of the second sub-pixel 220.

[0112] Figure 8 A partial cross-sectional schematic diagram of yet another display panel provided for at least one embodiment of the present utility model.

[0113] For example, Figure 8 As shown, the display panel 30 and Figure 1 The difference between the display panel 10 shown is that the position and connection method of the auxiliary electrode 600 are different. The remaining structure can refer to the above embodiment about Figure 1 The relevant description is not repeated here.

[0114] For example, Figure 8 As shown, the display panel 30 includes a first sub-pixel 210 and a second sub-pixel 220 adjacent to each other, and the auxiliary electrode 600 is located between the first sub-pixel 210 and the second sub-pixel 220. The display panel 10 also includes a planar layer 700 located on a side of the pixel defining portion 550 close to the base substrate 100, and the auxiliary electrode 600 is partially covered by the planar layer 700. For example, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected to the auxiliary electrode 600 through the via hole N20 in the planar layer 700. For example, a portion of the via hole N20 is located in the planar layer 700, and penetrates both the pixel defining portion 550 and the light emitting functional layer 310, so that the second electrode 420 of the first sub-pixel 210 can be extended into the via hole N20 to be electrically connected to the auxiliary electrode 600, and the second electrode 420 of the second sub-pixel 220 can be extended into the via hole N20 to be electrically connected to the auxiliary electrode 600.

[0115] For example, in some embodiments, the display panel may further include other film layers between the planar layer and the base substrate, and the auxiliary electrode may also be covered by other film layers. The embodiments of the present invention do not specifically limit the position of the auxiliary electrode.

[0116] Fig. 9 for Figure 1 Another schematic plan view of a display panel is shown; Fig.10 for Fig. 9 An enlarged schematic diagram of the auxiliary electrode in FIG.

[0117] For example, Fig. 9 As shown, the display panel 10 includes a plurality of first sub-pixels 210, a plurality of second sub-pixels 220, and a plurality of third sub-pixels 230. Adjacent auxiliary electrodes 600 in the display panel 10 are arranged at intervals from each other, and the second electrodes 420 of at least some of the sub-pixels 200 are electrically connected through the auxiliary electrode portion 610. For example, in the first direction X, the second sub-pixels 220 located on both sides of the first sub-pixel 210 are electrically connected to the first sub-pixel 210 through the auxiliary electrodes 600, and the third sub-pixels 230 located on both sides of the first sub-pixel 210 are electrically connected to the first sub-pixel 210 through the auxiliary electrodes 600. For example, in some embodiments, in the second direction Y, adjacent first sub-pixels 210 are electrically connected through the auxiliary electrodes 600, and the second sub-pixels 220 are electrically connected to the adjacent third sub-pixels 230 through the auxiliary electrodes 600. In this way, the second electrodes 420 of the plurality of sub-pixels 200 can be electrically connected, so as to facilitate synchronous application of signals.

[0118] For example, Fig.10 As shown, the positive projection of the auxiliary electrode 600 on the base substrate may be a rectangle. For example, the side length of the rectangle may be 17 μm to 20 μm. For example, the rectangle has a first side length D1 extending along the first direction X, and a second side length D2 extending along the second direction Y, and the first side length D1 may be substantially equal to the second side length D2, or the first side length D1 may be greater than the second side length D2. For example, the first side length D1 and the second side length D2 may both be 17 μm, 18 μm, 19 μm or 20 μm, so that the second electrode 420 of the adjacent sub-pixel 200 can be well electrically connected to the auxiliary electrode 600 to ensure the efficiency of electrical signal transmission.

[0119] Fig.11 A schematic plan view of yet another display panel provided for at least one embodiment of the utility model; Fig.12 for Fig.11 Schematic diagram of a partial cross-section of the display panel.

[0120] For example, Fig.11 As shown, the display panel 40 and Figure 1 The difference between the display panel 10 shown is that the structure and connection method of the auxiliary electrode 600 are different. The remaining structure can refer to the above embodiment about Figure 1 The relevant description is not repeated here.

[0121] For example, Fig.11 As shown, the plurality of auxiliary electrodes 600 in the display panel 40 include a plurality of first auxiliary electrode portions 610, a plurality of second auxiliary electrode portions 620, and a plurality of third auxiliary electrode portions 630. For example, the first auxiliary electrode portion 610 extends along the first direction X, the second auxiliary electrode portion 620 and the third auxiliary electrode portion 630 both extend along the second direction Y, the plurality of first auxiliary electrode portions 610 are sequentially arranged at intervals along the second direction Y, and the plurality of second auxiliary electrode portions 620 and the plurality of third auxiliary electrode portions 630 are alternately arranged along the first direction X. The plurality of second auxiliary electrode portions 620 can be electrically connected through the first conductive element 6201, and the plurality of third auxiliary electrode portions 630 can be electrically connected through the second conductive element 6301. For example, the first conductive element 6201 and the second conductive element 6301 can be made of the same conductive material, and the embodiments of the utility model are not limited thereto.

[0122] For example, Fig.11 As shown, the first auxiliary electrode portion 610, the second auxiliary electrode portion 620 and the third auxiliary electrode portion 630 can be insulated from each other and signals can be applied to them independently. For example, the second electrodes 420 of a part of the sub-pixels 200 in the display panel 40 are electrically connected through the first auxiliary electrode portion 610, the second electrodes 420 of another part of the sub-pixels 200 are electrically connected through the second auxiliary electrode portion 620, and the second electrodes 420 of another part of the sub-pixels 200 are electrically connected through the third auxiliary electrode portion 630. For example, the number of sub-pixels 200 electrically connected to the first auxiliary electrode portion 610, the second auxiliary electrode portion 620 and the third auxiliary electrode portion 630 can be the same or different, and the embodiments of the utility model are not limited to this. In this way, different signals can be applied to the sub-pixels 200 electrically connected to each other through the first auxiliary electrode portion 610, the second auxiliary electrode portion 620 and the third auxiliary electrode portion 630 to meet different requirements for the start-up voltage.

[0123] For example, Fig.11As shown, the plurality of sub-pixels 200 in the display panel 40 include a first color sub-pixel 2111, a second color sub-pixel 2211, and a third color sub-pixel 2311 that emit light of different colors, the light-emitting functional layer of the first color sub-pixel 2111, the light-emitting functional layer of the second color sub-pixel 2211, and the light-emitting functional layer of the third color sub-pixel 2311 are arranged at intervals, and the second electrode 420 of the first color sub-pixel 2111, the second electrode 420 of the second color sub-pixel 2211, and the second electrode 420 of the third color sub-pixel 2311 are arranged at intervals. For example, the first color sub-pixel 2111 is configured to emit blue light, the second color sub-pixel 2211 is configured to emit green light, and the third color sub-pixel 2311 is configured to emit red light, but it is not limited thereto.

[0124] It should be noted that the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel described here and the first sub-pixel, the second sub-pixel, and the third sub-pixel in the above embodiment describe different sub-pixels in a plurality of sub-pixels from different perspectives, and there is no conflict between the two. For example, the first sub-pixel may be one of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel, the second sub-pixel may be one of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel, and the third sub-pixel may be one of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel. In some examples, the first sub-pixel, the second sub-pixel, and the third sub-pixel may be the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel, respectively.

[0125] For example, Fig.11As shown, the second electrodes 420 of at least some of the first color sub-pixels 2111 are electrically connected via the first auxiliary electrode portion 610, the second electrodes 420 of at least some of the second color sub-pixels 2211 are electrically connected via the second auxiliary electrode portion 620, and the second electrodes 420 of at least some of the third color sub-pixels 2311 are electrically connected via the third auxiliary electrode portion 630. In the second direction Y, one first auxiliary electrode portion 610 is disposed between adjacent first color sub-pixels 2111, and the two adjacent first color sub-pixels 2111 are electrically connected via the first auxiliary electrode portion 610 located therebetween. For example, in the second direction Y, a plurality of second color sub-pixels 2211 located in the same column are connected to the same second auxiliary electrode portion 620, and a plurality of third color sub-pixels 230 located in the same column are connected to the same third auxiliary electrode portion 630. For example, a plurality of first color sub-pixels 2111 in the display panel 40 may receive the same electrical signal through the first auxiliary electrode portion 610, a plurality of second color sub-pixels 2211 may receive the same electrical signal through the second auxiliary electrode portion 620, and a plurality of third color sub-pixels 2311 may receive the same electrical signal through the third auxiliary electrode portion 630. For example, the signals applied to the first auxiliary electrode portion 610, the second auxiliary electrode portion 620, and the third auxiliary electrode portion 630 are different, thereby the second electrodes 420 of the sub-pixels 200 of different colors in the display panel 40 may be controlled respectively, thereby meeting the different requirements of the sub-pixels 200 of different colors for the turn-on voltage.

[0126] For example, Fig.12 As shown, the display panel 40 includes a planar layer 700 located on a side of the pixel defining portion 550 close to the base substrate 100. For example, the first auxiliary electrode portion 610 is closer to the base substrate 100 than the second auxiliary electrode portion 620, and the first auxiliary electrode portion 610 is located between the planar layer 700 and the base substrate 100, and contacts the planar layer 700. The second auxiliary electrode portion 620 and the third auxiliary electrode portion 630 are both located between the planar layer 700 and the pixel defining portion 550. For example, the second electrode 420 of the first color sub-pixel 2111 is electrically connected to the auxiliary electrode portion 610 through the first connection hole N1 in the planar layer 700, the second electrode 420 of the second color sub-pixel 2211 is electrically connected to the second auxiliary electrode portion 620 through the second connection hole N2 in the pixel defining portion 550, and the second electrode 420 of the third color sub-pixel 2311 is electrically connected to the third auxiliary electrode portion 630 through the third connection hole N3 in the pixel defining portion 550.

[0127] For example, Fig.11As shown, since the plurality of second auxiliary electrode portions 620 and the plurality of third auxiliary electrode portions 630 are alternately arranged in the first direction X, when the second auxiliary electrode portions 620 and the third auxiliary electrode portions 630 are both located on the flat layer, it is advantageous to simplify the manufacturing process of the second auxiliary electrode portions 620 and the third auxiliary electrode portions 630 and meet the reasonable layout of the layout space. For example, since the first auxiliary electrode portion 610 extends along the first direction X, by making the first auxiliary electrode portion 610 located on the side of the second auxiliary electrode portion 620 close to the base substrate 100, the risk of the second auxiliary electrode portion 620 and the third auxiliary electrode portion 630 being electrically connected to the first auxiliary electrode portion 610 can be reduced.

[0128] In some embodiments, when the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion are independently applied with signals, the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion may also be located in different layers. For example, the distances between the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion and the substrate increase in sequence. For example, a first insulating layer may be provided between the first auxiliary electrode portion and the second auxiliary electrode portion, and a second insulating layer may be provided between the second auxiliary electrode portion and the third auxiliary electrode portion, so as to facilitate the insulation of the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion from each other. The embodiments of the utility model do not specifically limit the positions of the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion.

[0129] Fig.13 A schematic plan view of yet another display panel provided for at least one embodiment of the present utility model.

[0130] For example, Fig.13 As shown, the display panel 50 and Fig.11 The difference between the display panel 40 shown in the figure is that the structure and connection method of the auxiliary electrode 600 are different. The remaining structure can refer to the above embodiment about Fig.11 The relevant description is not repeated here.

[0131] For example, Fig.13 As shown, the multiple auxiliary electrodes 600 in the display panel 50 may include a first sub-auxiliary electrode 670 and a second sub-auxiliary electrode 680, the first sub-auxiliary electrode 670 extends along the second direction Y, the second sub-auxiliary electrode 680 extends along the first direction X, and the multiple first sub-auxiliary electrodes 670 are all connected to the second sub-auxiliary electrode 680.

[0132] For example, Fig.13As shown, the display panel 50 includes a plurality of pixel unit columns 1231 and a plurality of pixel unit rows 1232, and the second electrodes 420 of the sub-pixels 200 in the pixel unit columns 1231 are connected to the same first sub-auxiliary electrode 670. For example, a first sub-auxiliary electrode 670 is provided in the pixel unit column 1231, and the first sub-auxiliary electrode 670 is located between the first sub-pixel 210 and the third sub-pixel 230, a plurality of first sub-pixels 210 located on one side of the first sub-auxiliary electrode 670 are all connected to the first sub-auxiliary electrode 670, and a plurality of second sub-pixels 220 and a plurality of third sub-pixels 230 located on the other side of the first sub-auxiliary electrode 670 are all connected to the first sub-auxiliary electrode 670. For example, the number of the first sub-auxiliary electrodes 670 in the display panel 50 is equal to the number of the pixel unit columns 1331. For example, the display panel 50 may include a plurality of first sub-auxiliary electrodes 670 and one second sub-auxiliary electrode 680 , and the plurality of first sub-auxiliary electrodes 670 are electrically connected through the second sub-auxiliary electrode 680 to form an integrated structure, so that the same signal can be applied thereto.

[0133] Fig.14 A schematic plan view of yet another display panel provided for at least one embodiment of the present utility model.

[0134] For example, Fig.14 As shown, the display panel 60 and Fig.13 The difference between the display panel 50 shown is that the number and connection method of the second sub-auxiliary electrodes 680 are different. The rest of the structure can refer to the above embodiment about Fig.13 The relevant description is not repeated here. Fig.14 As shown, the display panel 60 may include a plurality of first sub-auxiliary electrodes 670 and a plurality of second sub-auxiliary electrodes 680. The manner in which the plurality of second sub-pixels 220 and the plurality of third sub-pixels 230 are connected to the first sub-auxiliary electrodes 670 is described in detail in relation to FIG. Fig.13 The description is not repeated here.

[0135] For example, Fig.14As shown, the display panel 60 includes a plurality of pixel unit columns 1231 and a plurality of pixel unit rows 1232, and a second sub-auxiliary electrode 680 corresponds to two adjacent pixel unit rows 1232. For example, in the second direction Y, two adjacent first sub-pixels 210 are arranged between two adjacent second sub-auxiliary electrodes 680, and are electrically connected to the two second sub-auxiliary electrodes 680, respectively. For example, a plurality of first sub-auxiliary electrodes 670 and a plurality of second auxiliary electrode members 680 are connected as an integrated structure and are in a "net shape". For example, the first sub-auxiliary electrode 670 and the second auxiliary electrode member 680 may be located in the same layer or in different layers, but are not limited thereto. For example, a second auxiliary electrode member 680 may be electrically connected to a plurality of first sub-auxiliary electrodes 670. For example, the number of first sub-auxiliary electrodes 670 connected to at least two second auxiliary electrode members 680 may be different, and the embodiment of the utility model does not limit the number of first sub-auxiliary electrodes 670 connected to the second auxiliary electrode member 680.

[0136] For example, Figure 2 As shown, the first charge generation layer 351 of the sub-pixel 200 is located between the first light-emitting layer U1 and the second light-emitting layer U2, and the first light-emitting layer U1 is farther away from the base substrate 100 than the second light-emitting layer U2. Figure 3C As shown, the orthographic projection of the light-emitting area 2101 of the first sub-pixel 210 on the substrate falls within the orthographic projection of the first charge generating layer 2102 of the first sub-pixel 210 on the substrate, the orthographic projection of the light-emitting area 2201 of the second sub-pixel 220 on the substrate falls within the orthographic projection of the first charge generating layer 2202 of the second sub-pixel 220 on the substrate, and the orthographic projection of the light-emitting area 2301 of the third sub-pixel 230 on the substrate falls within the orthographic projection of the first charge generating layer 2302 of the third sub-pixel 230 on the substrate.

[0137] For example, Figure 3C As shown, the light-emitting functional layer of the first sub-pixel 210 and the light-emitting functional layer of the second sub-pixel 220 are spaced apart from each other, and the distance T between the first charge generation layer 2102 of the first sub-pixel 210 and the first charge generation layer 2202 of the adjacent second sub-pixel 220 is 18.0μm to 21.5μm, for example, it can be 21.5μm, 21.0μm, 20.5μm, 20.0μm, 19.5μm or 19.0μm. With such a setting, the pixel density of the display panel can be improved to improve the clarity of the displayed picture, thereby helping the display panel to have good display quality.

[0138] In some embodiments, the distance between the first charge generation layer of the first subpixel and the first charge generation layer of the third subpixel may also be 18.0 μm to 21.5 μm, for example, 21.5 μm, 21.0 μm, 20.5 μm, 20.0 μm, 19.5 μm or 19.0 μm, thereby further improving the pixel density of the display panel.

[0139] For example, Figure 3C As shown, the orthographic projection of the light-emitting region 2101 of the first sub-pixel 210 on the substrate is a first rectangle F1, the orthographic projection of the first charge generating layer 2102 of the first sub-pixel 210 on the substrate is a second rectangle F2, and the first rectangle F1 falls into the second rectangle F2, so that the orthographic projection area of ​​the light-emitting region 2101 of the first sub-pixel 210 on the substrate is smaller than the orthographic projection area of ​​the first charge generating layer 2102 of the first sub-pixel 210 on the substrate.

[0140] For example, Figure 3C As shown, the width v of the first rectangle F1 is not less than 14 μm, for example, it can be 15 μm, 16 μm, 17 μm or 18 μm, and the length h of the first rectangle F1 is not less than 50 μm, for example, it can be 53 μm, 55 μm, 58 μm or 60 μm. For example, the width a of the second rectangle F2 can be 14.5 μm to 17.0 μm, such as 14.6 μm, 15.1 μm, 15.7 μm or 16.4 μm, for example, the length b of the second rectangle F2 can be 52 μm to 60 μm, such as 52.0 μm, 54.0 μm, 56.0 μm or 58.5 μm. In this way, the light emitting area of ​​the first sub-pixel 210 can be expanded as much as possible, so that the first sub-pixel 210 has a larger pixel aperture ratio.

[0141] For example, refer to Fig.11 , the first color sub-pixel 2111 has a first pixel aperture ratio, which can be a percentage of the orthogonal projection area of ​​the light-emitting region of the first color sub-pixel 2111 on the substrate substrate to the orthogonal projection area of ​​the first charge generation layer on the substrate substrate. For example, the second color sub-pixel 2211 has a second pixel aperture ratio, which can be a percentage of the orthogonal projection area of ​​the light-emitting region of the second color sub-pixel 2211 on the substrate substrate to the orthogonal projection area of ​​the first charge generation layer on the substrate substrate. The third color sub-pixel 2311 has a third pixel aperture ratio, which can be a percentage of the orthogonal projection area of ​​the light-emitting region of the third color sub-pixel 2311 on the substrate substrate to the orthogonal projection area of ​​the first charge generation layer on the substrate substrate.

[0142] For example, the light-emitting functional layer of some display panels is made of a high-precision metal mask (FMM), the distance between the light-emitting areas of adjacent sub-pixels is generally not less than 19μm, the pixel aperture ratio does not exceed 43% (for example, 20%), the brightness of the display panel is about 800 nits, and the brightness life of the display panel is low. Compared with this solution, the embodiment of the utility model sets the first pixel aperture ratio, the second pixel aperture ratio and the third pixel aperture ratio to 45% to 65%, such as 45%, 50%, 55%, 60% or 65%, which can improve the brightness life and color life of each sub-pixel, so as to extend the service life of the display panel.

[0143] For example, refer to Fig.11 , the first pixel opening ratio is greater than the second pixel opening ratio, and the second pixel opening ratio is greater than the third pixel opening ratio. For example, the first pixel opening ratio may be 1.69 to 2.80 times of the third pixel opening ratio, such as 1.70 times, 1.75 times, 1.95 times, 2.40 times or 2.60 times. For example, the second pixel opening ratio may be 1.4 to 1.8 times of the third pixel opening ratio, such as 1.4 times, 1.5 times, 1.6 times, 1.7 times or 1.8 times. For example, the third pixel opening ratio, the second pixel opening ratio and the first pixel opening ratio may satisfy the following proportional relationship: 1:1.4:1.69, 1:1.4:2.4 or 1:1.8:2.8, but is not limited thereto.

[0144] With such a setting, when the light-emitting area of ​​the first color sub-pixel is larger than the light-emitting area of ​​the second color sub-pixel, and the light-emitting area of ​​the second color sub-pixel is larger than the light-emitting area of ​​the third color sub-pixel, the brightness lifespan of sub-pixels with different light-emitting areas can be balanced to make the overall brightness lifespan of the display panel more uniform.

[0145] Figure 3D for Figure 1 Schematic diagram of the distribution of the brightness attenuation ratio of the display panel.

[0146] For example, Figure 3D As shown, when the light-emitting functional layer in the display panel is manufactured by photolithography, the corresponding distribution curve of the brightness attenuation ratio is M10, and when the light-emitting functional layer in the display panel is manufactured by high-precision metal mask (FMM), the corresponding distribution curve of the brightness attenuation ratio is M20. Figure 3D As shown, when the light-emitting functional layer is manufactured by the photolithography process, the time corresponding to the brightness attenuation ratio of the display panel is 95% is about 9000 hours; when the light-emitting functional layer is manufactured by the high-precision metal mask (FMM), the time corresponding to the brightness attenuation ratio of the display panel is 95% is about 3000 hours. It can be seen that the use of the photolithography process to manufacture the light-emitting functional layer is beneficial to prolonging the life of the display panel.

[0147] For example, Figure 2 As shown, the first charge generation layer 351 in the light-emitting functional layer 300 of the sub-pixel includes a first main material and a first doping material, and the mass percentage of the first doping material in the first charge generation layer 351 is 12% to 18%, for example, it can be 13%, 15%, 16%, or 18%. For example, the first main material in the first charge generation layer 351 includes a triaromatic amine compound, and the first doping material includes a lithium quinoline complex, but is not limited thereto. For example, when the mass percentage of the first doping material in the first charge generation layer 351 is increased, it is beneficial to improve the brightness life of the display panel.

[0148] By increasing the mass percentage of the first doping material in the first charge generating layer to 12% to 18%, the brightness life of the display panel can be increased, so as to optimize the display effect.

[0149] For example, Figure 1 and Figure 2 As shown, the mass percentages of the first doping material in the first charge generation layer 351 of the sub-pixels 200 emitting light of different colors may be different. In some embodiments, when the first sub-pixel 210 is configured to emit blue light, the second sub-pixel 220 is configured to emit green light, and the third sub-pixel 230 is configured to emit red light, the first doping material in the first charge generation layer 351 of the first sub-pixel 210 has a first mass percentage, the first doping material in the first charge generation layer 351 of the second sub-pixel 220 has a second mass percentage, and the first doping material in the first charge generation layer 351 of the third sub-pixel 230 has a third mass percentage, and the first mass percentage is greater than the third mass percentage, and the third mass percentage is greater than the second mass percentage.

[0150] For example, Figure 1 and Figure 2 As shown, since the proportions of green light, red light and blue light in white light decrease successively, the brightness of the first sub-pixel 210 can be significantly improved by reducing the first mass percentage, the third mass percentage and the second mass percentage successively, the brightness improvement of the third sub-pixel 230 is smaller than the brightness improvement of the first sub-pixel 210, and the brightness improvement of the second sub-pixel 220 is smaller than the brightness improvement of the third sub-pixel 230, thereby making the brightness life of the display panel 10 more uniform.

[0151] For example, Figure 2As shown, the second charge generation layer 352 in the light-emitting functional layer 300 of the sub-pixel 200 is located between the first charge generation layer 351 and the second light-emitting layer U2, and the second charge generation layer 352 includes a second main material and a second doping material, and the mass percentage of the second doping material in the second charge generation layer 352 of the first sub-pixel 210 is 3% to 6%, for example, 3%, 4%, 5% or 6%. For example, the second main material includes 1,2,4-triazole, and the second doping material includes lithium, beryllium or boron, but is not limited thereto. For example, when the mass percentage of the second doping material in the second charge generation layer 352 of the sub-pixel is increased, it is beneficial to improve the luminous efficiency of the sub-pixel.

[0152] By increasing the mass percentage of the second doping material in the second charge generating layer to 3% to 6%, the luminous efficiency of the sub-pixel can be improved, so as to optimize the display effect.

[0153] In some embodiments, Figure 1 and Figure 2 As shown, the light-emitting layer of the first sub-pixel 210 (such as the first light-emitting layer U1 and the second light-emitting layer U2) includes a fluorescent material, and the light-emitting layers of the second sub-pixel 220 and the third sub-pixel 230 (such as the first light-emitting layer U1 and the second light-emitting layer U2) both include phosphorescent materials, which results in differences in the turn-on voltages of the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230, and makes the light-emitting efficiency of the first sub-pixel 210 lower than the light-emitting efficiency of the second sub-pixel 220 and the third sub-pixel 230.

[0154] For example, Figure 1 As shown, when the first sub-pixel 210 is configured to emit blue light, the second sub-pixel 220 is configured to emit green light, and the third sub-pixel 230 is configured to emit red light, the second doping material in the second charge generation layer 352 of the first sub-pixel 210 has a fourth mass percentage, the second doping material in the second charge generation layer 352 of the second sub-pixel 220 has a fifth mass percentage, and the second doping material in the second charge generation layer 352 of the third sub-pixel 230 has a sixth mass percentage, and the fifth mass percentage and the sixth mass percentage are both less than the fourth mass percentage. For example, the fifth mass percentage and the sixth mass percentage may be substantially the same.

[0155] With such an arrangement, the mass percentage of the second doping material in the second charge generation layer of the first sub-pixel can be greatly increased, so that the luminous efficiency of the first sub-pixel can be effectively enhanced.

[0156] For example, Figure 2As shown, the first hole transport layer HTL-1 is located between the first light-emitting layer U1 and the first charge generation layer 351, the first hole blocking layer HBL-1, the first electron transport layer ETL-1 and the electron injection layer Yb are located between the first light-emitting layer U1 and the second electrode 420, the first electron transport layer ETL-1 is located between the first hole blocking layer HBL-1 and the electron injection layer Yb, and the first hole blocking layer HBL-1 is closer to the first electrode 410 than the first electron transport layer ETL-1. The hole injection layer HIL and the second hole transport layer HTL-2 are located on the side of the second light-emitting layer U2 close to the first electrode 410, and the hole injection layer HIL is closer to the first electrode 410 than the second hole transport layer HTL-2. The second hole blocking layer HBL-2 ​​and the second electron transport layer ETL-2 are located between the second light-emitting layer U2 and the second charge generation layer 352, and the second hole blocking layer HBL-2 ​​is closer to the second light-emitting layer U2 than the second electron transport layer ETL-2. The light extraction layer CPL and the buffer layer LiF are located on a side of the second electrode 420 away from the first electrode 410 , and the light extraction layer CPL is closer to the first electrode 410 than the buffer layer LiF.

[0157] For example, Figure 2 As shown, the thickness of the hole injection layer HIL of the light-emitting functional layer 310 can be 100 to 200 angstroms, such as 100 angstroms, 150 angstroms, 180 angstroms or 200 angstroms. For example, the thickness of the first hole transport layer HTL-1 and the second hole transport layer HTL-2 can be 300 to 700 angstroms, such as 350 angstroms, 400 angstroms, 500 angstroms or 600 angstroms. For example, the thickness of the first charge generation layer 351 can be 500 to 700 angstroms, such as 500 angstroms, 600 angstroms, 650 angstroms or 700 angstroms. For example, the thickness of the second charge generation layer 352 can be 100 to 300 angstroms, such as 100 angstroms, 200 angstroms, 250 angstroms or 300 angstroms. For example, the thickness of the first hole blocking layer HBL-1 and the second hole blocking layer HBL-2 ​​can be 50 to 150 angstroms, such as 50 angstroms, 100 angstroms or 150 angstroms. For example, the thickness of the first electron transport layer ETL-1 and the second electron transport layer ETL-2 may be 300 to 400 angstroms, such as 300 angstroms, 380 angstroms, or 400 angstroms. For example, the thickness of the second electrode 420 may be 100 to 300 angstroms, such as 100 angstroms, 150 angstroms, 250 angstroms, or 300 angstroms. For example, the thickness of the electron injection layer Yb may be 10 to 30 angstroms, such as 10 angstroms, 20 angstroms, or 30 angstroms. For example, the thickness of the light extraction layer CPL may be 700 to 1200 angstroms, such as 800 angstroms, 950 angstroms, 1000 angstroms, or 1200 angstroms. For example, the thickness of the buffer layer LiF may be 600 to 900 angstroms, such as 600 angstroms, 720 angstroms, 800 angstroms, or 900 angstroms.

[0158] For example, Figure 2As shown, the first light-emitting layer U1 of the sub-pixel includes a first sub-light-emitting layer U11 and a first adjustment layer U12, and the first sub-light-emitting layer U11 is farther away from the first electrode 410 than the first adjustment layer U12. The second light-emitting layer U2 of the sub-pixel 200 includes a second sub-light-emitting layer U21 and a second adjustment layer U22, and the second sub-light-emitting layer U21 is farther away from the first electrode 410 than the second adjustment layer U22.

[0159] For example, Fig.11 and Figure 2 As shown, the first color sub-pixel 2111, the second color sub-pixel 2211 and the third color sub-pixel 2311 emit light of different colors, and the thickness of the first sub-light emitting layer U11, the first adjustment layer U12, the second sub-light emitting layer U21 and the second adjustment layer U22 of the first color sub-pixel 2111 are all 100 to 200 angstroms, such as 100 angstroms, 150 angstroms or 180 angstroms. The thickness of the first sub-light emitting layer U11 and the second sub-light emitting layer U21 of the second color sub-pixel 2211 are all 100 to 300 angstroms, such as 120 angstroms, 150 angstroms, 200 angstroms or 300 angstroms. For example, the thickness of the first adjustment layer U12 and the second adjustment layer U22 of the second color sub-pixel 2211 are all 300 to 500 angstroms, such as 300 angstroms, 400 angstroms, 450 angstroms or 500 angstroms. For example, the thickness of the first sub-light-emitting layer U11 and the second sub-light-emitting layer U21 of the third color sub-pixel 2311 are both 300 to 500 angstroms, such as 300 angstroms, 390 angstroms, 450 angstroms or 500 angstroms, and the thickness of the first adjustment layer U12 and the second adjustment layer U22 of the third color sub-pixel 2311 are both 500 to 700 angstroms, such as 500 angstroms, 600 angstroms, 650 angstroms or 700 angstroms.

[0160] By setting the thickness of each film layer of the sub-pixel within a suitable range, the overall thickness of the display panel is made appropriate while satisfying the luminous characteristics of the sub-pixel, which is beneficial to improving the life of the display panel and making it have a good display effect.

[0161] Fig.15 is a structural schematic diagram of a display panel; Fig.16 for Fig.15 Schematic diagram of color gamut distribution of a display panel; Fig.17 for Fig.15 Schematic diagram of the spectral curve distribution of the display panel.

[0162] For example, Fig.15As shown, a hole injection layer HIL, a first hole transport layer HTL-1, a second hole transport layer HTL-2, a first charge generation layer 351, a second charge generation layer 352, a first hole blocking layer HBL-1, a second hole blocking layer HBL-2, a first electron transport layer ETL-1, a second electron transport layer ETL-2, a second electrode 420, an electron injection layer Yb, a light extraction layer CPL and a buffer layer LiF uniform layer are arranged. The thickness of the hole injection layer HIL in the display panel is 150 angstroms, the thickness of the first hole transport layer HTL-1 and the second hole transport layer HTL-2 are both 350 angstroms, the thickness of the first charge generation layer 351 is 650 angstroms, the thickness of the second charge generation layer 352 can be 200 angstroms, the thickness of the first hole blocking layer HBL-1 and the second hole blocking layer HBL-2 ​​are both 100 angstroms, the thickness of the first electron transport layer ETL-1 and the second electron transport layer ETL-2 are both 380 angstroms, the thickness of the second electrode 420 is 150 angstroms, the thickness of the electron injection layer Yb is 10 angstroms, the thickness of the light extraction layer CPL is 950 angstroms, and the thickness of the buffer layer LiF can be 720 angstroms.

[0163] For example, in Fig.15 In the display panel shown, the first sub-pixel 210 is used as a blue sub-pixel, and the thickness of the first sub-light-emitting layer and the second sub-light-emitting layer is 100 angstroms, and the thickness of the first adjustment layer and the second adjustment layer is 180 angstroms. The mass percentage of the first doping material in the first charge generation layer 351 is 10.0%. For example, the second sub-pixel 220 is used as a green sub-pixel, and the thickness of the first sub-light-emitting layer and the second sub-light-emitting layer is 120 angstroms, and the thickness of the first adjustment layer and the second adjustment layer is 400 angstroms. For example, the third sub-pixel 230 is used as a red sub-pixel, and the thickness of the first sub-light-emitting layer and the second sub-light-emitting layer is 390 angstroms, and the thickness of the first adjustment layer and the second adjustment layer is 500 angstroms.

[0164] For example, Fig.16 As shown, when the grayscale level of the display panel is 255, the color gamut distribution result is R1, and the overall color gamut value is 103%; when the grayscale level of the display panel is 8, the color gamut distribution result is R2, and the overall color gamut value is 96%, that is, the deviation from the overall color gamut of the grayscale level 255 is 7%. When the grayscale level is 255, the color gamut value of the first sub-pixel 210 is E3, and the deviation △By between it and the color gamut value when the grayscale level is 8 is 0.023; the color gamut value of the second sub-pixel 220 is E2, and the deviation △Gx between it and the color gamut value when the grayscale level is 8 is 0.003; the color gamut value of the third sub-pixel 230 is E1, and the deviation △Rx between it and the color gamut value when the grayscale level is 8 is 0.013.

[0165] It can be seen from this that Figure 15 to Figure 17As shown in FIG. 1 , the deviation ΔBy between the color gamut values ​​of the first sub-pixel 210 when the grayscale levels are 255 and 8 is large, so that at low grayscale levels (for example, low brightness), the display effect of the display panel is greatly affected by the crosstalk of the first sub-pixel 210. Fig.17 As shown, when the first sub-pixel 210 is enabled to emit light alone, the spectrum curve has a peak corresponding to red light at a wavelength of 600 nm to 650 nm, and thus the third sub-pixel 230 may emit light at the same time.

[0166] Fig.18 is a schematic diagram of the structure of another display panel; Fig.19 for Fig.18 Schematic diagram of color gamut distribution of a display panel; Fig. 20 for Fig.18 Schematic diagram of spectrum curve distribution of the display panel; Fig.21 for Fig.18 Schematic diagram of the brightness attenuation ratio distribution of the display panel.

[0167] For example, compared to Fig.15 The display panel shown, Fig.18 The difference of the display panel shown is that the first charge generation layers of adjacent sub-pixels are arranged in a spaced relationship, for example, the first charge generation layer of the third sub-pixel 230 is arranged in a spaced relationship with the first charge generation layer of the second sub-pixel 220, and the first charge generation layer of the second sub-pixel 220 is arranged in a spaced relationship with the first charge generation layer of the first sub-pixel 210. Fig.18 As shown, the mass percentage of the first doping material in the first charge generation layer 351 is 15.0%. Fig.18 For other structures of the display panel in the embodiment, please refer to the Fig.15 The relevant instructions are not repeated here.

[0168] For example, Fig.19 As shown, when the grayscale level of the display panel is 255, the color gamut distribution result is R1, and the overall color gamut value is 103%; when the grayscale level of the display panel is 8, the color gamut distribution result is R2, and the overall color gamut value is 98%, that is, the deviation of the overall color gamut compared to the grayscale level of 255 is 5%. When the grayscale level is 255, the color gamut value of the first sub-pixel 210 is E3, and the deviation △By between it and the color gamut value when the grayscale level is 8 is 0.017; the color gamut value of the second sub-pixel 220 is E2, and the deviation △Gx between it and the color gamut value when the grayscale level is 8 is 0.002; the color gamut value of the third sub-pixel 230 is E1, and the deviation △Rx between it and the color gamut value when the grayscale level is 8 is 0.001.

[0169] It can be seen that compared with Fig.16As shown in the results, the first charge generation layers of adjacent sub-pixels are arranged at intervals, which can reduce the deviation between the color gamut values ​​of the sub-pixels in the display panel when the grayscale levels are 255 and 8. Fig. 20 As shown, when the first sub-pixel is made to emit light alone, the peak value of the spectrum curve corresponding to red light at a wavelength of 600nm-650nm is significantly reduced, thereby reducing the probability of crosstalk between the first sub-pixel and the third sub-pixel.

[0170] For example, Fig.21 As shown in FIG. 1 , when the mass percentage of the first doping material in the first charge generation layer is 10.0%, the corresponding distribution curve of the brightness attenuation ratio is R3; when the mass percentage of the first doping material in the first charge generation layer is 15.0%, the corresponding distribution curve of the brightness attenuation ratio is R4. Fig.21 It can be seen that when the mass percentage of the first doping material in the first charge generating layer is increased to 15.0%, when the brightness decay ratio is 96%, the time corresponding to the distribution curve R3 of the brightness decay ratio can be increased by about 800 hours compared with the time corresponding to the distribution curve R4 of the brightness decay ratio.

[0171] Fig. 22 is a schematic diagram of the structure of another display panel; Fig.23 for Fig. 22 Schematic diagram of color gamut distribution of a display panel; Fig.24 for Fig. 22 Schematic diagram of the spectral curve distribution of the display panel.

[0172] For example, compared to Fig.18 The display panel shown, Fig. 22 The difference of the display panel shown is that the second charge generation layers 352 of adjacent sub-pixels are arranged at intervals, for example, the second charge generation layer 352 of the third sub-pixel 230 is arranged at intervals from the second charge generation layer 352 of the second sub-pixel 220, and the second charge generation layer 352 of the second sub-pixel 220 is arranged at intervals from the second charge generation layer 352 of the first sub-pixel 210. Fig. 22 As shown, the mass percentage of the second doping material in the second charge generation layer 352 is 4.0%. Fig. 22 For other structures of the display panel in the embodiment, please refer to the Fig.18 The relevant instructions are not repeated here.

[0173] For example, Fig.23As shown, when the grayscale level of the display panel is 255, the color gamut distribution result is R1, and the overall color gamut value is 103%; when the grayscale level of the display panel is 8, the color gamut distribution result is R2, and the overall color gamut value is 100%, that is, the deviation of the overall color gamut compared to the grayscale level of 255 is 3%. When the grayscale level is 255, the color gamut value of the third sub-pixel 230 is E1, and the deviation △Rx between it and the color gamut value when the grayscale level is 8 is 0.002; the color gamut value of the second sub-pixel 220 is E2, and the deviation △Gx between it and the color gamut value when the grayscale level is 8 is 0.001; the color gamut value of the first sub-pixel 210 is E3, and the deviation △By between it and the color gamut value when the grayscale level is 8 is 0.017.

[0174] It can be seen that compared with Fig.19 As shown in the results, the second charge generation layers of adjacent sub-pixels are arranged at intervals, which can further reduce the deviation of the overall color gamut of the sub-pixels of the display panel when the grayscale levels are 255 and 8, respectively. Fig.24 As shown, when the first sub-pixel is made to emit light alone, the peak value of the spectrum curve corresponding to red light at a wavelength of 600nm to 650nm is further reduced, thereby further reducing the probability of crosstalk between the first sub-pixel and the third sub-pixel. In addition, by increasing the mass percentage of the second doping material in the second charge generation layer to 4.0% (for example, Fig.15 and Fig.18 In the display panel, the mass percentage of the second doping material in the second charge generating layer is 2.0%, which can increase the luminous efficiency of the display panel by 10%.

[0175] The embodiment of the utility model further provides a display device, which includes the display panel described in any of the above embodiments. Therefore, the technical effects of the above display panel can also be embodied on the display device, which will not be described in detail here.

[0176] Figure 25 to Figure 32 For the corresponding Fig.18 A structural schematic diagram of the manufacturing process of the display panel shown.

[0177] For example, Figure 25-26 As shown, the manufacturing method of the display panel includes: preparing a base substrate 100 in sequence, forming a pixel circuit 900 on the base substrate 100, setting a planar layer 700, and patterning first electrodes 410 of multiple sub-pixels, and making the first electrodes 410 of adjacent sub-pixels spaced apart from each other.

[0178] For example, Fig.25 As shown, the method for manufacturing a display panel further includes forming a first partial film layer 3101 in the light-emitting functional layer. Figure 2 and Fig.18The first partial film layer 3101 may include a hole injection layer HIL, a second hole transport layer HTL-2, a second light-emitting layer U2, a second hole blocking layer HBL-2, a second electron transport layer ETL-2 and a second charge generation layer 352. For example, each film layer in the first partial film layer 3101 except the second light-emitting layer U2 is arranged in a uniform layer.

[0179] For example, Fig.25 As shown, the method for manufacturing a display panel further includes forming a first optical adhesive layer 3120 on the first partial film layer 3101 .

[0180] For example, Fig.26 As shown, the first optical adhesive layer 3120 is subjected to a photolithography process so that a portion of the first optical adhesive layer 3120 corresponding to a sub-pixel of a specific color is removed. Fig.26 In the example, the third sub-pixel 230 corresponding to the red light in the first optical adhesive layer 3120 is removed, but the embodiments of the present invention are not limited thereto. In some embodiments, a portion of the first sub-pixel 210 corresponding to the blue light in the first optical adhesive layer 3120 may be removed, or a portion of the second sub-pixel 220 corresponding to the green light in the first optical adhesive layer 3120 may be removed. For example, Fig.26 As shown, a first portion of the optical adhesive layer 10110 corresponding to the second sub-pixel 220 emitting green light and the first sub-pixel 210 emitting blue light in the first optical adhesive layer 3120 are retained.

[0181] For example, Fig. 27 As shown, the method for manufacturing a display panel further includes: forming a first charge generating layer 351 on the first portion of the optical adhesive layer 10110 .

[0182] For example, Fig.28 As shown, the manufacturing method of the display panel further includes: performing photolithography on the first charge generation layer 351 to remove the portion of the first charge generation layer 351 corresponding to the first sub-pixel 210 and the portion of the second sub-pixel 220, and leaving the portion of the first charge generation layer 351 corresponding to the third sub-pixel 230. At the same time, the first portion of the optical adhesive layer 10110 (see FIG. 1 ) corresponding to the second sub-pixel 220 emitting green light and the first sub-pixel 210 emitting blue light in the first optical adhesive layer 3120 is removed. Fig. 27 ) are removed together, thereby forming the first charge generation layer 351 of the third sub-pixel 230.

[0183] For example, Figure 29-30As shown, a second optical adhesive layer 3130 is formed on the first charge generation layer 351 of the third sub-pixel 230. Then, the second optical adhesive layer 3130 is subjected to a photolithography process, so that a second portion of the optical adhesive layer 31301 corresponding to the first sub-pixel 210 and the third sub-pixel 230 in the second optical adhesive layer 3130 is retained, and a portion of the second optical adhesive layer 3130 corresponding to the second sub-pixel 220 is removed.

[0184] For example, Figure 31-32 As shown, a first charge generation layer 351 is formed again on the second portion of the optical adhesive layer 31301. For ease of understanding, the first charge generation layer 351 formed again uses the same label. Then, the first charge generation layer 351 formed again is subjected to photolithography to remove the portions corresponding to the first sub-pixel 210 and the third sub-pixel 230, and retain the portion corresponding to the second sub-pixel 220. At the same time, the portions of the second portion of the optical adhesive layer 31301 corresponding to the first sub-pixel 210 and the second sub-pixel 220 are removed together, thereby forming the first charge generation layer 351 of the second sub-pixel 220. Fig.32 As shown, the first charge generation layer 351 of the second sub-pixel 220 and the first charge generation layer 351 of the third sub-pixel 230 are disposed spaced apart from each other.

[0185] Similarly, see Figure 29 to Figure 32 , a first charge generation layer of the first sub-pixel 210 can be formed, and the first charge generation layer 351 of the first sub-pixel 210, the first charge generation layer 351 of the second sub-pixel 230 and the first charge generation layer 351 of the third sub-pixel 230 are all arranged at intervals from each other, and the specific steps are not repeated herein.

[0186] For example, see Fig.18 The manufacturing method of the display panel may also include: forming a first hole transport layer HTL-1, a first light-emitting layer U1 of the first sub-pixel 210, a first hole blocking layer HBL-1, a first electron transport layer ETL-1, an electron injection layer Yb, a second electrode 420, a light extraction layer CPL, a buffer layer LiF and an encapsulation layer TFE and other film layers. The materials of the above film layers are all conventional materials and are not described in detail here.

[0187] Figure 33 to Figure 43 A structural schematic diagram of a manufacturing process of a display panel provided by at least one embodiment of the present utility model.

[0188] For example, Fig.33 As shown, a base substrate 100 is provided. The material of the base substrate 100 can refer to conventional materials and is not limited here.

[0189] For example, Fig.34As shown, a plurality of sub-pixels are formed on a base substrate 100 , and each sub-pixel includes a light-emitting element and a pixel circuit 900 for driving the corresponding light-emitting element to emit light.

[0190] It should be noted that although Fig.34 The light-emitting elements corresponding to each sub-pixel are mentioned, but since each light-emitting element includes many stacked structures, they cannot be shown in this step. Therefore, only the formation of the pixel circuit 900 is shown in this step.

[0191] For example, Fig.35 As shown, the first electrode 410 is patterned to form the first electrode 410. The first electrode 410 divides each adjacent sub-pixel so that each first electrode 410 corresponds to a sub-pixel.

[0192] For example, Fig.36 As shown, a pixel defining portion 550 is patterned to form the pixel defining portion 550, which includes a plurality of openings 510 to define the light emitting area of ​​the sub-pixel, and the pixel defining portion 550 includes the pixel defining portion 550, and the pixel defining portion 550 surrounds the opening 510. For example, the plurality of openings 510 may include a first opening 1210 corresponding to a first sub-pixel, a second opening 1220 corresponding to a second sub-pixel, and a third opening 1230 corresponding to a third sub-pixel.

[0193] For example, Fig.37A As shown, a first light-emitting functional layer 1310, a second electrode first film layer 1420, and a first shielding layer 1510 are formed on a side of the first electrode 410 away from the base substrate 100. For example, the first light-emitting functional layer 1310 may include a plurality of film layers stacked, for example, may include Figure 2 The multiple film layers shown are not limited in the embodiments of the present invention.

[0194] For example, Fig.37B As shown, a first photoresist layer 1610 is formed on the first shielding layer 1510 and at a position corresponding to the first opening 1210. For example, the material of the first photoresist layer 1610 can refer to conventional materials, which will not be described in detail herein.

[0195] For example, Figures 37B to 37C As shown, the first shielding layer 1510 is patterned using the first photoresist layer 1610 as a mask to form a first shielding structure 11510. Fig.37C In the structure shown, the first shielding structure 11510 only covers the area corresponding to the leftmost sub-pixel.

[0196] For example, Fig.37D As shown, the first photoresist layer 1610 on the side of the first blocking structure 11510 away from the substrate 100 is removed.

[0197] For example, Figures 37D to 37E As shown, the first light-emitting functional layer 1310 and the second electrode first film layer 1420 are patterned using the first shielding structure 11510 as a mask to form the light-emitting functional layer 11310 and the second electrode 11420 corresponding to the first sub-pixel.

[0198] For example, Fig.38A As shown, a second light-emitting functional layer 2310 , a second electrode first film layer 2420 , and a second shielding layer 1520 are formed on the side of the light-emitting functional layer 11310 and the second electrode 11420 corresponding to the first sub-pixel away from the base substrate 100 .

[0199] For example, Fig.38B As shown, a second photoresist layer 1620 is formed on the second blocking layer 1520 and at a position corresponding to the second opening 1220 .

[0200] For example, Figures 38B to 38C As shown, the second shielding layer 1520 is patterned using the second photoresist layer 1620 as a mask to form a second shielding structure 11520. For example, the second shielding structure 11520 only covers the area corresponding to the middle sub-pixel. For example, the material of the second shielding structure 11520 is the same as that of the first shielding structure 11510, and the embodiments of the present invention will not be repeated.

[0201] For example, Fig.38C-38D As shown, the second photoresist layer 1620 on the side of the second blocking structure 11520 away from the substrate 100 is removed.

[0202] For example, Figures 38D to 38E As shown, the second light-emitting functional layer 2310 and the second electrode first film layer 2420 are patterned using the second shielding structure 11520 as a mask to form the light-emitting functional layer 21310 and the second electrode 21420 corresponding to the second sub-pixel, and the remaining film layer on the first shielding structure 11510 is removed.

[0203] For example, Fig.39 As shown, a third light-emitting functional layer 3310 , a second electrode first film layer 3420 , and a third shielding layer 1530 are formed on a side of the first electrode 410 corresponding to the third sub-pixel and away from the base substrate 100 .

[0204] For example, Fig.40 As shown, a third photoresist layer 1630 is formed on the third blocking layer 1530 and at a position corresponding to the third opening 1230 .

[0205] For example, Figure 40-41As shown, the third photoresist layer 1630 is used as a mask to remove the portion of the third blocking layer 1530 except the portion corresponding to the third opening 1230 , so as to form a third blocking structure 11530 corresponding to the third opening 1230 .

[0206] For example, Figure 41-42 As shown, the third photoresist layer 1630 on the side of the third blocking structure 11530 away from the substrate 100 is removed.

[0207] For example, Figure 42-43 As shown, the third light-emitting functional layer 3310 and the second electrode first film layer 3420 are patterned using the third shielding structure 11530 as a mask to form the light-emitting functional layer 31310 and the second electrode 31420 corresponding to the third sub-pixel.

[0208] For example, in some embodiments, the method for manufacturing a display panel further includes: removing the first blocking structure 11510 , the second blocking structure 11520 , and the third blocking structure 11530 .

[0209] For example, in some embodiments, reference Figure 7 ,exist Fig.36 Prior to the corresponding steps, the method for manufacturing a display panel provided by the embodiment of the present invention further includes: forming a plurality of auxiliary electrodes 600, and making the auxiliary electrodes 600 located in the intervals between the first electrodes 410 of adjacent sub-pixels. After the auxiliary electrodes 600 are manufactured, continue to Fig.36 The next steps.

[0210] For example, in some embodiments, reference Figure 8 ,exist Fig.35 Prior to the corresponding steps, the method for manufacturing a display panel provided by the embodiment of the present invention further includes: forming a plurality of auxiliary electrodes 600, and forming a planar layer 700, and making the planar layer 700 cover the auxiliary electrodes 600. After the planar layer 700 is manufactured, continue to Fig.35 and the steps that follow.

[0211] Figures 44 to 46 A structural schematic diagram of another display panel manufacturing process provided for at least one embodiment of the present utility model.

[0212] For example, in some embodiments, reference Figure 1 ,exist Figure 37A to Figure 43The corresponding steps may not include the step of forming the second electrode corresponding to each sub-pixel 200, and only include the step of making the light-emitting functional layer for each sub-pixel 200. For example, the second electrode first film layer 1420, the second electrode first film layer 2420, and the second electrode first film layer 3420 may not be provided and patterned. For example, the second electrode of each sub-pixel may be Fig.43 In the following steps, Fig.43 The structure formed after the corresponding steps can be found in Fig.44 .

[0213] For example, in some embodiments, Fig.45 As shown, after the light-emitting functional layer 310 of each sub-pixel 200 is formed, the method for manufacturing the display panel also includes: forming an auxiliary electrode 600 on the side of the pixel defining portion 550 away from the base substrate 100. For the structural characteristics of the auxiliary electrode 600, please refer to the relevant description in the aforementioned embodiment, which will not be repeated here.

[0214] For example, Fig.46 As shown, the method for manufacturing a display panel further includes: forming an insulating pattern 800 , and making at least a portion of the insulating pattern 800 located between the auxiliary electrode 600 and the light-emitting functional layer 310 , so that the auxiliary electrode 600 and the light-emitting functional layer 310 are insulated from each other.

[0215] For example, refer to Figure 1 After completing the production of the insulating pattern 800, the method for producing the display panel further includes: forming the second electrodes 420 of each sub-pixel 200, so that the second electrodes 420 of adjacent sub-pixels 200 are spaced apart from each other, and the second electrodes 420 of at least some of the sub-pixels 200 are electrically connected through the auxiliary electrode 600. For the structure of the insulating pattern 800, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0216] There are a few points to note:

[0217] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the conventional designs.

[0218] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present invention may be combined with each other.

[0219] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate substrate; A plurality of sub-pixels are located on the base substrate, the sub-pixels include a light-emitting element, the light-emitting element includes a light-emitting functional layer, and a first electrode and a second electrode located on both sides of the light-emitting functional layer, the first electrode is closer to the base substrate than the second electrode, the first electrodes of adjacent sub-pixels are spaced apart from each other, and the plurality of sub-pixels include a first sub-pixel and a second sub-pixel adjacent to each other; a pixel defining portion, located between the light-emitting functional layer and the base substrate, the pixel defining portion comprising a plurality of openings, the openings being configured to expose at least a portion of the first electrode of the sub-pixel to define a light-emitting region of the sub-pixel, The light-emitting functional layer of the first sub-pixel and the light-emitting functional layer of the second sub-pixel are spaced apart from each other, the distance between the light-emitting region of the first sub-pixel and the light-emitting region of the second sub-pixel is no more than 10 μm, and the second electrode of the first sub-pixel and the second electrode of the second sub-pixel are spaced apart from each other. The display panel further includes a plurality of auxiliary electrodes located on the base substrate, and the second electrodes of at least some sub-pixels are electrically connected via the auxiliary electrodes.

2. The display panel according to claim 1, characterized in that: An orthographic projection of the auxiliary electrode on the base substrate at least partially overlaps with an orthographic projection of the pixel defining portion on the base substrate.

3. The display panel according to claim 2, characterized in that: Adjacent auxiliary electrodes are arranged to be spaced apart from each other.

4. The display panel according to claim 2, characterized in that: The plurality of auxiliary electrodes are of an integrated structure.

5. The display panel according to claim 3, characterized in that: The plurality of auxiliary electrodes include a plurality of first auxiliary electrode portions, a plurality of second auxiliary electrode portions, and a plurality of third auxiliary electrode portions. The second electrodes of a part of the plurality of sub-pixels are electrically connected via the first auxiliary electrode portion, the second electrodes of another part of the plurality of sub-pixels are electrically connected via the second auxiliary electrode portion, and the second electrodes of another part of the plurality of sub-pixels are electrically connected via the third auxiliary electrode portion. Signals are applied independently to the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion.

6. The display panel according to claim 5, characterized in that: The plurality of sub-pixels include a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel that emit light of different colors, The light-emitting functional layer of the first color sub-pixel, the light-emitting functional layer of the second color sub-pixel and the light-emitting functional layer of the third color sub-pixel are arranged at intervals, and the second electrode of the first color sub-pixel, the second electrode of the second color sub-pixel and the second electrode of the third color sub-pixel are arranged at intervals.

7. The display panel according to claim 6, characterized in that: At least some of the second electrodes of the first color sub-pixels are electrically connected via the first auxiliary electrode portion, at least some of the second electrodes of the second color sub-pixels are electrically connected via the second auxiliary electrode portion, and at least some of the second electrodes of the third color sub-pixels are electrically connected via the third auxiliary electrode portion.

8. The display panel according to claim 7, characterized in that: The display panel further includes a planar layer, the planar layer is located on a side of the pixel defining portion close to the base substrate, the first auxiliary electrode portion is located between the planar layer and the base substrate, and the second auxiliary electrode portion and the third auxiliary electrode portion are both located between the pixel defining portion and the planar layer. The second electrode of the first color sub-pixel is electrically connected to the first auxiliary electrode portion through a first connection hole in the planar layer, the second electrode of the second color sub-pixel is electrically connected to the second auxiliary electrode portion through a second connection hole in the pixel defining portion, and the second electrode of the third color sub-pixel is electrically connected to the third auxiliary electrode portion through a third connection hole in the pixel defining portion.

9. The display panel according to any one of claims 2 to 7, characterized in that: The auxiliary electrode is located at a side of the pixel defining portion away from the base substrate, and the second electrodes of at least some of the sub-pixels are in contact with the auxiliary electrode to be electrically connected.

10. The display panel according to claim 9, characterized in that: The display panel also includes an insulating pattern, which is located on a side of the pixel defining portion away from the base substrate, and at least a portion of the insulating pattern is located between the light-emitting functional layer of any sub-pixel in the at least some of the sub-pixels and the auxiliary electrode, so that the auxiliary electrode and the light-emitting functional layer of the sub-pixel are insulated from each other.

11. The display panel according to claim 10, characterized in that: The distance between the light-emitting functional layer of the sub-pixel and the auxiliary electrode is 2 μm to 4 μm.

12. The display panel according to claim 9, characterized in that: A surface of the auxiliary electrode close to the base substrate contacts the pixel defining portion, and a surface of the auxiliary electrode far from the pixel defining portion is farther from the base substrate than a surface of the second electrode far from the pixel defining portion.

13. The display panel according to any one of claims 2 to 7, characterized in that: The auxiliary electrode is partially covered by the pixel defining portion, and the second electrode of any sub-pixel in at least some of the sub-pixels is electrically connected to the auxiliary electrode through a via hole in the pixel defining portion.

14. The display panel according to any one of claims 2 to 7, characterized in that: The display panel further includes a planar layer, the planar layer is located on a side of the pixel defining portion close to the base substrate, and the auxiliary electrode is partially covered by the planar layer. The second electrode of any sub-pixel in at least some of the sub-pixels is electrically connected to the auxiliary electrode through a via hole in the planar layer.

15. The display panel according to claim 2, characterized in that: The plurality of sub-pixels further include a third sub-pixel, the light-emitting functional layer of the third sub-pixel, the light-emitting functional layer of the first sub-pixel, and the light-emitting functional layer of the second sub-pixel are arranged at intervals, and the second electrode of the third sub-pixel, the second electrode of the first sub-pixel, and the second electrode of the second sub-pixel are arranged at intervals, The first sub-pixel, the second sub-pixel and the third sub-pixel constitute a pixel unit, and the second sub-pixel and the third sub-pixel in the pixel unit are located on the same side of the first sub-pixel, The display panel includes a plurality of pixel units, which are arranged in an array on the base substrate to form a plurality of pixel unit columns arranged in a first direction and a plurality of pixel unit rows arranged in a second direction, wherein the first direction intersects with the second direction and are both parallel to the base substrate. The plurality of first sub-pixels in the pixel unit column are sequentially arranged at intervals in the second direction, and the plurality of second sub-pixels and the plurality of third sub-pixels in the pixel unit column are alternately arranged in the second direction.

16. The display panel according to claim 15, characterized in that: The plurality of auxiliary electrodes include a plurality of first sub-auxiliary electrodes and second sub-auxiliary electrodes, the first sub-auxiliary electrodes extend along the second direction, the second sub-auxiliary electrodes extend along the first direction, and the plurality of first sub-auxiliary electrodes are all connected to the second sub-auxiliary electrodes, The first sub-auxiliary electrode is located between the first sub-pixel and the third sub-pixel, and the second electrodes of the sub-pixels in the pixel unit column are connected to the same first sub-auxiliary electrode.

17. The display panel according to any one of claims 1 to 8, characterized in that: The auxiliary electrodes between adjacent sub-pixels in at least part of the sub-pixels have a rectangular, trapezoidal or elliptical cross-section along a plane, wherein the plane is perpendicular to the substrate and parallel to the direction of the line connecting the geometric centers of the adjacent sub-pixels; and / or the size of the auxiliary electrodes in a direction perpendicular to the substrate is 1 μm to 2 μm.

18. The display panel according to claim 3, characterized in that: The orthographic projection of the auxiliary electrode on the base substrate is a rectangle, and the side length of the rectangle is 17 μm to 20 μm.

19. The display panel according to claim 2, characterized in that: The light-emitting functional layer of the sub-pixel includes a first light-emitting layer, a first charge generating layer, and a second light-emitting layer stacked in a direction perpendicular to the base substrate, wherein the first charge generating layer is located between the first light-emitting layer and the second light-emitting layer, and the first light-emitting layer is farther away from the base substrate than the second light-emitting layer. A distance between the first charge generation layer of the first sub-pixel and the first charge generation layer of the adjacent second sub-pixel is 18.0 μm to 21.5 μm.

20. The display panel according to claim 19, characterized in that: The orthographic projection of the light emitting area of ​​the first sub-pixel on the substrate is a first rectangle, the orthographic projection of the first charge generating layer of the first sub-pixel on the substrate is a second rectangle, and the first rectangle falls into the second rectangle. The width of the first rectangle is not less than 14 μm, the length of the first rectangle is not less than 50 μm, the width of the second rectangle is 14.5 μm to 17.0 μm, and the length of the second rectangle is 52 μm to 60 μm.

21. The display panel according to claim 6, characterized in that: The first color sub-pixel has a first pixel opening ratio, the second color sub-pixel has a second pixel opening ratio, and the third color sub-pixel has a third pixel opening ratio. The first pixel opening ratio is greater than the second pixel opening ratio, and the second pixel opening ratio is greater than the third pixel opening ratio.

22. The display panel according to claim 21, characterized in that: The second pixel opening ratio is 1.4 to 1.8 times the third pixel opening ratio, and the first pixel opening ratio is 1.69 to 2.80 times the third pixel opening ratio; and / or the first pixel opening ratio, the second pixel opening ratio and the third pixel opening ratio are all 45% to 65%.

23. The display panel according to claim 19, characterized in that: The light-emitting functional layer further includes a second charge generating layer, and a hole injection layer, a second hole transport layer, a second hole blocking layer, a second electron transport layer, a first hole transport layer, a first hole blocking layer, a first electron transport layer and an electron injection layer stacked in a direction perpendicular to the base substrate, wherein the second charge generating layer is located between the first charge generating layer and the second light-emitting layer, and the display panel further includes a light extraction layer and a buffer layer. The first hole transport layer is located between the first light-emitting layer and the first charge generating layer, the first hole blocking layer, the first electron transport layer and the electron injection layer are located between the first light-emitting layer and the second electrode, the first electron transport layer is located between the first hole blocking layer and the electron injection layer, and the first hole blocking layer is closer to the substrate than the first electron transport layer. The hole injection layer and the second hole transport layer are located on a side of the second light emitting layer close to the base substrate, and the hole injection layer is closer to the base substrate than the second hole transport layer. The second hole blocking layer and the second electron transport layer are located between the second light-emitting layer and the second charge generating layer, and the second hole blocking layer is closer to the second light-emitting layer than the second electron transport layer. The light extraction layer and the buffer layer are located on a side of the second electrode away from the base substrate, and the light extraction layer is closer to the base substrate than the buffer layer. The first light-emitting layer of the sub-pixel includes a first sub-light-emitting layer and a first adjustment layer, the first sub-light-emitting layer is farther away from the base substrate than the first adjustment layer, and the second light-emitting layer of the sub-pixel includes a second sub-light-emitting layer and a second adjustment layer, the second sub-light-emitting layer is farther away from the base substrate than the second adjustment layer.

24. The display panel according to claim 23, characterized in that: The thickness of the hole injection layer of the sub-pixel is 100-200 angstroms, the thickness of the first hole transport layer and the second hole transport layer are both 300-700 angstroms, the thickness of the first charge generation layer is 500-700 angstroms, the thickness of the second charge generation layer is 100-300 angstroms, the thickness of the first hole blocking layer and the second hole blocking layer are both 50-150 angstroms, the thickness of the first electron transport layer and the second electron transport layer are both 300-400 angstroms, the thickness of the second electrode is 100-300 angstroms, the thickness of the electron injection layer is 10-30 angstroms, the thickness of the light extraction layer is 700-1200 angstroms, and the thickness of the buffer layer is 600-900 angstroms. The multiple sub-pixels of the display panel include a first color sub-pixel, a second color sub-pixel and a third color sub-pixel emitting light of different colors, and the thicknesses of the first sub-light-emitting layer, the second sub-light-emitting layer, the first adjustment layer and the second adjustment layer of the first color sub-pixel are all 100-200 angstroms; the thicknesses of the first sub-light-emitting layer and the second sub-light-emitting layer of the second color sub-pixel are all 100-300 angstroms, and the thicknesses of the first adjustment layer and the second adjustment layer of the second color sub-pixel are all 300-500 angstroms; the thicknesses of the first sub-light-emitting layer and the second sub-light-emitting layer of the third color sub-pixel are all 300-500 angstroms, and the thicknesses of the first adjustment layer and the second adjustment layer of the third color sub-pixel are all 500-700 angstroms.

25. A display device, characterized in that: A display panel comprising any one of claims 1-24.

Images