Display panel and display device

Abstract

A display panel and a display device. The display panel comprises a base substrate, a plurality of sub-pixels, and a pixel defining portion; a light-emitting element of each sub-pixel comprises a light-emitting functional layer, and a first electrode and a second electrode which are located on two sides of the light-emitting functional layer; the first electrodes of every two adjacent sub-pixels are spaced apart from each other; the plurality of sub-pixels include a first sub-pixel and a second sub-pixel which are adjacent to each other; 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 a light-emitting region of the first sub-pixel and a light-emitting region of the second sub-pixel is not greater 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 comprises a plurality of auxiliary electrodes located on the base substrate; and the second electrodes of at least some of the sub-pixels are electrically connected by means of the auxiliary electrodes. The display panel has a relatively high pixel density, and can effectively reduce the risk of crosstalk between adjacent sub-pixels.

Description

Display panel and display device

[0001] This application claims priority to Chinese Patent Application No. 202410197923.4 filed on February 22, 2024, and the contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as a part of this application. Technical Field

[0002] Embodiments of the present disclosure relate to a display panel and a display device. Background Art

[0003] 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.

[0004] OLED displays have become a mainstream display technology, capable of active light emission and continuously adjustable color. For example, tandem organic light-emitting display devices, by adding at least one light-emitting layer and a charge-generating layer, can improve the device's lifespan and brightness while reducing its power consumption. Summary of the Invention

[0005] At least one embodiment of the present disclosure provides a display panel and a display device.

[0006] At least one embodiment of the present disclosure provides a display panel, comprising a base substrate, a plurality of sub-pixels, and a pixel defining portion, wherein the 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 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 base 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 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 further includes a plurality of auxiliary electrodes located on the base substrate, and the second electrodes of at least some of the sub-pixels are electrically connected through the auxiliary electrodes.

[0007] According to the display panel provided by at least one embodiment of the present disclosure, 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.

[0008] According to the display panel provided by at least one embodiment of the present disclosure, adjacent auxiliary electrodes are spaced apart from each other.

[0009] According to the display panel provided by at least one embodiment of the present disclosure, the plurality of auxiliary electrodes are an integrated structure.

[0010] According to a display panel provided by at least one embodiment of the present disclosure, 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 portion of the plurality of sub-pixels are electrically connected via the first auxiliary electrode portions, the second electrodes of another portion of the plurality of sub-pixels are electrically connected via the second auxiliary electrode portions, and the second electrodes of another portion of the plurality of sub-pixels are electrically connected via the third auxiliary electrode portions, and signals are independently applied to the first auxiliary electrode portions, the second auxiliary electrode portions, and the third auxiliary electrode portions.

[0011] According to a display panel provided by at least one embodiment of the present disclosure, 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.

[0012] According to the display panel provided by at least one embodiment of the present disclosure, the second electrodes of at least part of the first color sub-pixels are electrically connected through the first auxiliary electrode portion, the second electrodes of at least part 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.

[0013] According to at least one embodiment of the present disclosure, a display panel is provided, which further includes a planar layer, which 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, 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.

[0014] According to at least one embodiment of the present disclosure, in a display panel provided, 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 for electrical connection.

[0015] According to at least one embodiment of the present disclosure, a display panel is provided, which further includes an insulating pattern, wherein the insulating pattern 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.

[0016] According to the display panel provided by at least one embodiment of the present disclosure, the distance between the light-emitting functional layer of the sub-pixel and the auxiliary electrode is 2 μm to 4 μm.

[0017] According to a display panel provided by at least one embodiment of the present disclosure, 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.

[0018] According to the display panel provided by at least one embodiment of the present disclosure, 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.

[0019] According to a display panel provided by at least one embodiment of the present disclosure, 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 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 in the planar layer.

[0020] According to a display panel provided by at least one embodiment of the present disclosure, the multiple sub-pixels also 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, 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.

[0021] According to a display panel provided by at least one embodiment of the present disclosure, the multiple auxiliary electrodes include multiple 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 multiple 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.

[0022] According to the display panel provided by at least one embodiment of the present disclosure, the auxiliary electrodes between adjacent sub-pixels in at least a portion of the sub-pixels are rectangular, trapezoidal or elliptical in cross-section along a plane, and the plane is perpendicular to the base 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 base substrate is 1μm to 2μm.

[0023] According to the display panel provided by at least one embodiment of the present disclosure, 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.

[0024] According to the display panel provided by at least one embodiment of the present disclosure, 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.

[0025] According to the display panel provided by at least one embodiment of the present disclosure, 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%.

[0026] According to the display panel provided by at least one embodiment of the present disclosure, the mass percentages of the first doping material in the first charge generation layer of sub-pixels emitting light of different colors are different.

[0027] According to the display panel provided by at least one embodiment of the present disclosure, 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.

[0028] According to the display panel provided by at least one embodiment of the present disclosure, the light-emitting area of ​​the first sub-pixel has an orthographic projection on the base substrate in the form of a first rectangle, the first charge generation layer of the first sub-pixel has an orthographic projection on the base substrate in the form of 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.

[0029] According to the display panel provided by at least one embodiment of the present disclosure, the light-emitting functional layer of the sub-pixel also includes a second charge generation layer, the second charge generation layer is located between the first charge generation layer and the second light-emitting layer, the second charge generation layer 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 of the first sub-pixel is 3% to 6%.

[0030] According to the display panel provided by at least one embodiment of the present disclosure, the second host material includes 1,2,4-triazole, and the second doping material includes lithium, beryllium, or boron.

[0031] According to the display panel provided by at least one embodiment of the present disclosure, the first color sub-pixel has a first pixel aperture ratio, the second color sub-pixel has a second pixel aperture ratio, and the third color sub-pixel has a third pixel aperture ratio, the first pixel aperture ratio is greater than the second pixel aperture ratio, and the second pixel aperture ratio is greater than the third pixel aperture ratio.

[0032] According to the display panel provided by at least one embodiment of the present disclosure, the second pixel aperture ratio is 1.4 to 1.8 times the third pixel aperture ratio, the first pixel aperture ratio is 1.69 to 2.80 times the third pixel aperture ratio; and / or the first pixel aperture ratio, the second pixel aperture ratio and the third pixel aperture ratio are all 45% to 65%.

[0033] According to a display panel provided by at least one embodiment of the present disclosure, the light-emitting functional layer further 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 further 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, the hole injection layer and the second hole blocking layer are 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 located between the first hole blocking layer and the electron injection layer. The 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 generation 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 away 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 away from the substrate than the second adjustment layer.

[0034] According to the display panel provided by at least one embodiment of the present disclosure, the thickness of the hole injection layer of the sub-pixel is 100 to 200 angstroms, the thickness of the first hole transport layer and the second hole transport layer are both 300 to 700 angstroms, the thickness of the first charge generation layer is 500 to 700 angstroms, the thickness of the second charge generation layer is 100 to 300 angstroms, the thickness of the first hole blocking layer and the second hole blocking layer are both 50 to 150 angstroms, the thickness of the first electron transport layer and the second electron transport layer are both 300 to 400 angstroms, the thickness of the second electrode is 100 to 300 angstroms, the thickness of the electron injection layer is 10 to 30 angstroms, the thickness of the light extraction layer is 700 to 1200 angstroms, and the thickness of the buffer layer is 100 to 150 angstroms. The thickness is 600 to 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 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 to 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 to 300 angstroms, and the thickness of the first adjustment layer and the second adjustment layer of the second color sub-pixel are both 300 to 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 to 500 angstroms, and the thickness of the first adjustment layer and the second adjustment layer of the third color sub-pixel are both 500 to 700 angstroms.

[0035] At least one embodiment of the present disclosure further provides a display device, comprising the display panel provided by any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, 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 disclosure, rather than limiting the present disclosure.

[0037] FIG1 is a partial cross-sectional schematic diagram of a display panel provided by at least one embodiment of the present disclosure.

[0038] FIG2 is a schematic diagram of a partial structure of a display panel provided by at least one embodiment of the present disclosure.

[0039] FIG. 3A is a schematic plan view of the display panel shown in FIG. 1 .

[0040] FIG. 3B is a schematic diagram of a partial structure of the display panel in FIG. 3A .

[0041] FIG3C is a schematic diagram of a partial structure of a pixel unit in the display panel of FIG3A .

[0042] FIG. 3D is a schematic diagram showing the distribution of the brightness attenuation ratio of the display panel in FIG. 1 .

[0043] FIG. 4 is an enlarged schematic diagram of a partial structure of the display panel in FIG. 1 .

[0044] FIG5A is a partial cross-sectional schematic diagram of another display panel provided by at least one embodiment of the present disclosure.

[0045] FIG. 5B is an enlarged schematic diagram of a partial structure of the display panel in FIG. 5A .

[0046] FIG6 is a partial cross-sectional schematic diagram of yet another display panel provided by at least one embodiment of the present disclosure.

[0047] FIG7 is a partial cross-sectional schematic diagram of yet another display panel provided by at least one embodiment of the present disclosure.

[0048] FIG8 is a partial cross-sectional schematic diagram of yet another display panel provided by at least one embodiment of the present disclosure.

[0049] FIG. 9 is another schematic plan view of the display panel shown in FIG. 1 .

[0050] FIG10 is an enlarged schematic diagram of the auxiliary electrode in FIG9 .

[0051] FIG11 is a schematic plan view of yet another display panel provided by at least one embodiment of the present disclosure.

[0052] FIG12 is a partial cross-sectional schematic diagram of the display panel in FIG11 .

[0053] FIG13 is a schematic plan view of yet another display panel provided by at least one embodiment of the present disclosure.

[0054] FIG14 is a schematic plan view of yet another display panel provided by at least one embodiment of the present disclosure.

[0055] FIG15 is a schematic structural diagram of a display panel.

[0056] FIG. 16 is a schematic diagram of the color gamut distribution of the display panel in FIG. 15 .

[0057] FIG. 17 is a schematic diagram showing a spectrum curve distribution of the display panel in FIG. 15 .

[0058] FIG18 is a schematic structural diagram of another display panel.

[0059] FIG19 is a schematic diagram of the color gamut distribution of the display panel in FIG18 .

[0060] FIG. 20 is a schematic diagram of a spectrum curve distribution of the display panel in FIG. 18 .

[0061] FIG. 21 is a schematic diagram showing the distribution of the brightness attenuation ratio of the display panel in FIG. 18 .

[0062] FIG22 is a schematic structural diagram of yet another display panel.

[0063] FIG23 is a schematic diagram of the color gamut distribution of the display panel in FIG22 .

[0064] FIG. 24 is a schematic diagram showing the spectrum curve distribution of the display panel in FIG. 22 .

[0065] 25 to 32 are structural schematic diagrams corresponding to the manufacturing process of the display panel shown in FIG. 18 .

[0066] 33 to 43 are schematic structural diagrams of a manufacturing process of a display panel provided by at least one embodiment of the present disclosure.

[0067] 44 to 46 are schematic structural diagrams of another display panel manufacturing process provided by at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0068] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0069] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are simply used to distinguish different components. The words "include" or "comprising" and similar terms mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0070] The features such as “parallel”, “perpendicular” and “same” used in the embodiments of the present disclosure include the features such as “parallel”, “perpendicular” and “same” in the strict sense, as well as the cases where “approximately parallel”, “approximately perpendicular” and “approximately the same” contain certain errors, taking into account the errors associated with the measurement and the measurement of specific quantities (for example, the limitations of the measurement system), and are expressed as being 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 below in the embodiments of the present disclosure, 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 “a plurality” refers to at least two.

[0071] Typically, OLED display products can be manufactured using a vacuum evaporation process. However, since this process requires a high-precision metal mask (FMM), the pixel density of the display product is limited, for example, to only around 500. Therefore, the resolution of OLED display products needs to be improved.

[0072] For example, the light-emitting functional layer of an OLED display product (such as a tandem device) includes a plurality of stacked film layers, such as a hole transport layer (HTL), a charge generation layer (CGL), and an electron transport layer (ETL), which serve as common film layers. In some display panels, in order to improve luminous efficiency, the light-emitting functional layers of sub-pixels with different luminous colors may use different organic materials to improve electron mobility or hole mobility. For example, the light-emitting functional layers of red and green sub-pixels use phosphorescent materials, while the light-emitting functional layers of blue sub-pixels use fluorescent materials. This results in the turn-on voltages of the red and green sub-pixels being different from the turn-on voltage of the 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 displaying, 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 likely 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, resulting in impure light color of the monochrome sub-pixel, a low color gamut of the display panel, and poor display effect.

[0073] At least one embodiment of the present disclosure provides a display panel and a display device.

[0074] At least one embodiment of the present disclosure provides a display panel, including a base substrate, a plurality of sub-pixels and a pixel defining portion, wherein the 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 that are adjacent to each other; the pixel defining portion is located between the light-emitting functional layer and the base substrate, the pixel defining portion includes a plurality of openings, the openings are configured to expose at least part of the first electrode of the sub-pixel to define the light-emitting area of ​​the sub-pixel, 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 base substrate, and the second electrodes of at least some of the sub-pixels are electrically connected through the auxiliary electrodes.

[0075] In the display panel provided by the embodiments of the present disclosure, 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, 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 apart 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 higher, which can improve the clarity of the displayed picture and have good display quality.

[0076] Hereinafter, the display panel and the display device provided by the embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0077] 1 is a partial cross-sectional schematic diagram of a display panel provided in at least one embodiment of the present disclosure; FIG. 2 is a partial structural schematic diagram of a display panel provided in at least one embodiment of the present disclosure; and FIG. 3A is a planar schematic diagram of the display panel shown in FIG. 1 .

[0078] As shown in FIG1 , 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, which includes a light-emitting functional layer 310, and a first electrode 410 and a second electrode 420 located on either side of the light-emitting functional layer 310, with the first electrode 410 being 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 stacked sequentially on the substrate 100. For example, each sub-pixel 200 in the display panel 10 includes a light-emitting element 300, which may be, for example, an organic light-emitting element, but is not limited thereto.

[0079] For example, as shown in FIG3A , the plurality of sub-pixels 200 may be arranged in an array along a first direction X and a second direction Y, wherein the first direction X intersects the second direction Y and is parallel to the base substrate. For example, the first direction X may be perpendicular to the second direction Y. For example, as shown in FIG1 , the third direction Z represents a direction perpendicular to the base substrate 100.

[0080] As shown in Figure 2, 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 multiple 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 generation layer 352, a first charge generation 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 stacked in sequence along the third direction Z and from the first electrode 410 to the second electrode 420.

[0081] For example, as shown in FIG2 , the first charge generation layer 351 and the second charge generation layer 352 have strong conductivity, which can provide the light-emitting functional layer 310 with advantages such as long life, low power consumption, and high brightness. For example, compared to a light-emitting functional layer without the first charge generation layer 351 and the second charge generation layer 352, the provision of the first charge generation layer 351 and the second charge generation layer 352 in the light-emitting functional layer 310 can effectively improve the brightness of the light-emitting element 300. For example, the light-emitting element 300 shown in FIG2 can be a tandem light-emitting element.

[0082] For example, as shown in FIG2 , the first charge generation layer 351 can be a p-type charge generation layer, and the second charge generation layer 352 can be an n-type charge generation layer. The first charge generation layer 351 and the second charge generation layer 352 have high charge mobility. For example, the first electrode 410 can be an anode, and the second electrode 420 can be a cathode. For example, the cathode can be formed of a material with high conductivity and low work function, such as a metal material. For example, the anode can be formed of a transparent conductive material with a high work function, although this is not limited in the embodiments of the present disclosure.

[0083] As shown in FIG1 , in some examples, the display panel 10 further includes a pixel defining portion 550 positioned 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, thereby defining 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 an opening 510 of the pixel defining portion 550, the first electrode 410 and the second electrode 420 positioned on either side 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 sub-pixel 200 described above may refer to an area of ​​the sub-pixel 200 that effectively emits light, and the shape of the light-emitting region may refer 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.

[0084] As shown in FIG1 , at least a portion of the pixel delimiting 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 spaced apart from each other. The plurality of sub-pixels 200 include a first sub-pixel 210 and a second sub-pixel 220. The light-emitting functional layer 310 of the first sub-pixel 210 is spaced apart from the light-emitting functional layer 310 of the second sub-pixel 220. The light-emitting functional layer 310 of the first sub-pixel 210 and the light-emitting functional 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 present disclosure, the light-emitting functional layer 310 of the sub-pixel 200 can be patterned using a photolithography process. This effectively reduces the risk of lateral electron and hole transport between the first sub-pixel 210 and the second sub-pixel 220, thereby reducing crosstalk. For example, the luminescent color of the first sub-pixel 210 can be different from the luminescent 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 embodiments of the present disclosure.

[0085] As shown in Figure 1, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are arranged to be 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, so that it can be suitable for large-scale production.

[0086] As shown in FIG1 , the display panel 10 further includes an auxiliary electrode 600 located on the base substrate 100. The second electrodes 420 of at least some of the sub-pixels 200 are electrically connected via the auxiliary electrode 600. For example, the second electrode 420 of the first sub-pixel 210 may be electrically connected to the second electrode 420 of the second sub-pixel 220 via the auxiliary electrode 600. For example, among all the sub-pixels 200 in the display panel 10, two adjacent sub-pixels 200 are electrically connected via the auxiliary electrode 600.

[0087] For example, as shown in FIG1 , 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 are 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, thereby reducing the resistance and facilitating increased transmission current. Thus, the provision of the auxiliary electrode 600 can ensure continuity between the second electrodes 420 of the multiple sub-pixels 200 connected thereto, facilitating the synchronous application of control signals.

[0088] For example, as shown in FIG3A , the plurality of sub-pixels 200 in the display panel 10 further include a third sub-pixel 230. The light-emitting functional layer 310 of the third sub-pixel 230 is spaced apart from the light-emitting functional layer 310 of the first sub-pixel 210, and the light-emitting functional layer 310 of the third sub-pixel 230 is spaced apart from the light-emitting functional layer 310 of the second sub-pixel 220. The second electrode 420 of the third sub-pixel 230 is spaced apart from the second electrode 420 of the first sub-pixel 210, and the second electrode 420 of the third sub-pixel 230 is spaced apart from the second electrode 420 of the second sub-pixel 220. For example, the emission color of the third sub-pixel 230 is different from the emission color of the first sub-pixel 210 and the emission color of the second sub-pixel 220, but the present disclosure is not limited thereto. For example, the emission color of the third sub-pixel 230 can be the same as the emission color of at least one of the first sub-pixel 210 and the second sub-pixel 220, although this is not limited in the present disclosure.

[0089] For example, as shown in FIG3A , a plurality of first sub-pixels 210 and a plurality of second sub-pixels 220 are alternately arranged in sequence in a first direction X, and a plurality of second sub-pixels 220 and a plurality of third sub-pixels 230 are alternately arranged in sequence in a second direction Y. For example, FIG3A schematically illustrates the light-emitting areas of the first sub-pixel 210 , the second sub-pixel 220 , and the third sub-pixel 230 . In the first direction X, a 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 no greater than 10 μm, and may be, for example, 5 μm, 6 μm, 7 μm, 8 μm, or 9 μm.

[0090] With this arrangement, the first sub-pixels and the second sub-pixels 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 display image and achieving good display quality.

[0091] The display panel provided by the embodiments of the present disclosure 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 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 display image and thus have good display quality.

[0092] FIG3B is a schematic diagram of a partial structure of the display panel in FIG3A ; FIG3C is a schematic diagram of a partial structure of a pixel unit in the display panel in FIG3A .

[0093] For example, as shown in Figures 1 and 3B , a pixel-defining portion 550 is located 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, the auxiliary electrode 600 in Figure 1 is located on a side of the pixel-defining portion 550 that is away from the base substrate 100, but the embodiments of the present disclosure are not limited thereto. In some embodiments, the auxiliary electrode 600 may also be located on a side of the pixel-defining portion 550 that is closer to the base substrate 100.

[0094] For example, as shown in FIG3A , a first sub-pixel 210, a second sub-pixel 220, and a third sub-pixel 230 constitute a pixel unit 123. 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 areas 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 area of ​​the third sub-pixel 230 on the substrate is smaller than the orthographic projection area of ​​the light-emitting area of ​​the second sub-pixel 220 on the substrate. The orthographic projection area of ​​the light-emitting area of ​​the second sub-pixel 220 on the substrate is smaller than the orthographic projection area of ​​the light-emitting area of ​​the first sub-pixel 210 on the substrate.

[0095] As shown in FIG3A , the display panel 10 includes a plurality of pixel units 123 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 columns 1231 are arranged in sequence and spaced apart 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 columns 1231 are arranged alternately in the second direction Y.

[0096] For example, as shown in FIG1 , the auxiliary electrode 600 is located on a side of the pixel-defining portion 550 away from the base substrate 100, and the second electrodes 420 of at least some of the sub-pixels 200 are in contact with the auxiliary electrode 600 for electrical connection. As shown in FIG1 , 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 either side of the auxiliary electrode 600, and the second electrode 420 of the first sub-pixel 210 is in contact with a sidewall of the auxiliary electrode 600 for electrical connection, while the second electrode 420 of the second sub-pixel 220 is in contact with another sidewall of the auxiliary electrode 600 for electrical connection. Thus, 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 electrodes 420 of the second sub-pixel 220 and the second electrodes 420 of the third sub-pixel 230 are respectively in contact with the sidewalls of the auxiliary electrode 600 for electrical connection. This connection method is beneficial to simplifying the connection structure between the second electrode 420 of the sub-pixel 200 and the auxiliary electrode 600 , and is beneficial to achieving higher electrical signal transmission efficiency between the second electrode 420 of the sub-pixel 200 and the auxiliary electrode 600 .

[0097] For example, as shown in FIG1 , the display panel 10 further includes an insulating pattern 800. The insulating pattern 800 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, thereby insulating the auxiliary electrode 600 from the light-emitting functional layer 310 of the sub-pixel 200. For example, at least a portion of the insulating pattern 800 is coated on the sidewalls of the auxiliary electrode 600, so that the light-emitting functional layers 310 of adjacent sub-pixels 200 (e.g., 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, thereby reducing 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 may be coated on the sidewalls of the auxiliary electrode 600 along its circumference to provide good insulation.

[0098] For example, as shown in FIG1 , the second electrode 420 of the first sub-pixel 210 is electrically connected to the second electrode 420 of the second sub-pixel 220 via 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 via the auxiliary electrode 600. A 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 2 μm to 4 μm, for example, 2 μm, 3 μm, or 4 μm. This arrangement ensures that the light-emitting functional layers 310 of adjacent sub-pixels 200 are well separated, thereby reducing the risk of crosstalk.

[0099] For example, as shown in FIG1 , the insulating pattern 800 may be made of, but not limited to, 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. For example, the insulating pattern 800 may have a thickness of 2 μm to 4 μm, such as 2 μm, 3 μm, or 4 μm. For example, the insulating pattern 800 may have an opening size M3 in the first direction X, and M3 may be less than 18 μm, such as 5 μm, 9 μm, 13 μm, 15 μm, or 18 μm.

[0100] For example, as shown in FIG1 , a surface 601 of the auxiliary electrode 600 adjacent 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 in contact with each other. For example, the auxiliary electrode 600 is fabricated 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.

[0101] For example, as shown in FIG1 , a surface 602 of the auxiliary electrode 600 that is away from the pixel defining portion 550 is further away from the base substrate 100 than a surface 401 of the second electrode 420 that is away from the pixel defining portion 550. That is, in the second direction Y, the surface 602 of the auxiliary electrode 600 that is away from the pixel defining portion 550 is not covered by the second electrode 420, thereby enabling the second electrode 420 of the adjacent sub-pixel 200 to fully contact the sidewall of the auxiliary electrode 600 to form a stable electrical connection.

[0102] For example, as shown in FIG1 , the auxiliary electrode 600 can serve as a support pad for the display panel 10 and can be made of a metal material, an alloy material, or an inorganic material. For example, the auxiliary electrode 600 is disposed on each pixel delimiting 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, such as 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.

[0103] FIG. 4 is an enlarged schematic diagram of a partial structure of the display panel in FIG. 1 .

[0104] For example, as shown in FIG1 and FIG4 , the first sub-pixel 210 and the second sub-pixel 220 are adjacent sub-pixels, and the auxiliary electrode 600 between the first sub-pixel 210 and the second sub-pixel 220 has a rectangular cross-section along a plane perpendicular to the substrate 100 and parallel to the line connecting the geometric centers of the first sub-pixel 210 and the second sub-pixel 220. Similarly, the auxiliary electrode 600 between the second sub-pixel 220 and the third sub-pixel 230 also has a rectangular cross-section along a plane perpendicular to the substrate 100 and parallel to the line connecting the geometric centers of the second sub-pixel 220 and the third sub-pixel 230.

[0105] FIG5A is a partial cross-sectional schematic diagram of another display panel provided by at least one embodiment of the present disclosure; FIG5B is an enlarged schematic diagram of the partial structure of the display panel in FIG5A .

[0106] For example, as shown in FIG5A , the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected via an auxiliary electrode 600. The auxiliary electrode 600 has a trapezoidal cross-section along a plane perpendicular to the base substrate and parallel to a line connecting the centers of the first sub-pixel 210 and the second sub-pixel 220. As shown in FIG5A and FIG5B , in the first direction X, the upper base of the trapezoid is smaller than the lower base, and the upper base is further away from the pixel defining portion 550 than the lower base. This allows 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, thereby insulating the light-emitting functional layer 310 and the auxiliary electrode 600 from each other.

[0107] FIG6 is a partial cross-sectional schematic diagram of yet another display panel provided by at least one embodiment of the present disclosure.

[0108] For example, as shown in FIG6 , the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected via an auxiliary electrode 600. The auxiliary electrode 600 has a trapezoidal cross-section along a plane perpendicular to the base substrate and parallel to a line connecting the centers of the first sub-pixel 210 and the second sub-pixel 220, and the upper base of the trapezoid is closer to the pixel defining portion 550 than the lower base. This arrangement makes it difficult for the light-emitting functional layer 310 to pass over the edge of the auxiliary electrode 600 that is away from the base substrate, thereby having a certain blocking effect on the auxiliary electrode 600 and reducing the risk of crosstalk.

[0109] In some embodiments, the cross section of the auxiliary electrode along a plane perpendicular to the base substrate and parallel to the center line connecting adjacent sub-pixels may also be elliptical or in other shapes, which is not limited in the embodiments of the present disclosure.

[0110] FIG7 is a partial cross-sectional schematic diagram of yet another display panel provided by at least one embodiment of the present disclosure.

[0111] For example, as shown in FIG7 , the display panel 20 differs from the display panel 10 shown in FIG1 in that the position and connection method of the auxiliary electrode 600 are different. For the remaining structures, reference may be made to the relevant description of FIG1 in the above embodiment and will not be repeated here.

[0112] For example, as shown in FIG7 , the display panel 20 includes a first sub-pixel 210 and a second sub-pixel 220 adjacent to each other. 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 via a via hole N10 in the pixel defining portion 550. The second electrode 420 of the second sub-pixel 220 is also electrically connected to the auxiliary electrode 600 via a 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 along the sidewall 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 along the sidewall of the via hole N10 until it contacts the auxiliary electrode 600. This allows the second electrode 420 of the first sub-pixel 210 to be electrically connected to the second electrode 420 of the second sub-pixel 220.

[0113] FIG8 is a partial cross-sectional schematic diagram of yet another display panel provided by at least one embodiment of the present disclosure.

[0114] For example, as shown in FIG8 , the display panel 30 differs from the display panel 10 shown in FIG1 in that the position and connection method of the auxiliary electrode 600 are different. For the remaining structures, reference may be made to the relevant description of FIG1 in the above embodiment and will not be repeated here.

[0115] For example, as shown in FIG8 , the display panel 30 includes a first sub-pixel 210 and a second sub-pixel 220 adjacent to each other, with an auxiliary electrode 600 located between the first sub-pixel 210 and the second sub-pixel 220. The display panel 10 further includes a planar layer 700 located on a side of the pixel defining portion 550 adjacent 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 via a 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 passes through both the pixel defining portion 550 and the light-emitting functional layer 310, thereby allowing the second electrode 420 of the first sub-pixel 210 to extend into the via hole N20 to be electrically connected to the auxiliary electrode 600, and allowing the second electrode 420 of the second sub-pixel 220 to extend into the via hole N20 to be electrically connected to the auxiliary electrode 600.

[0116] 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 electrodes may also be covered by other film layers. The embodiments of the present disclosure do not specifically limit the position of the auxiliary electrodes.

[0117] FIG9 is another schematic plan view of the display panel shown in FIG1 ; FIG10 is an enlarged schematic view of the auxiliary electrode in FIG9 .

[0118] For example, as shown in FIG9 , a 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 spaced apart from each other, and the second electrodes 420 of at least some of the sub-pixels 200 are electrically connected via the auxiliary electrode portion 610. For example, in a first direction X, the second sub-pixels 220 located on either side of a first sub-pixel 210 are electrically connected to the first sub-pixel 210 via the auxiliary electrodes 600, and the third sub-pixels 230 located on either side of the first sub-pixel 210 are electrically connected to the first sub-pixel 210 via the auxiliary electrodes 600. For example, in some embodiments, in a second direction Y, adjacent first sub-pixels 210 are electrically connected via the auxiliary electrodes 600, and the second sub-pixels 220 are electrically connected to the adjacent third sub-pixels 230 via the auxiliary electrodes 600. This arrangement allows the second electrodes 420 of the plurality of sub-pixels 200 to be electrically connected, facilitating synchronous signal application.

[0119] For example, as shown in FIG10 , the orthographic 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. 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.

[0120] FIG11 is a schematic plan view of yet another display panel provided by at least one embodiment of the present disclosure; FIG12 is a schematic partial cross-sectional view of the display panel in FIG11 .

[0121] For example, as shown in FIG11 , the display panel 40 differs from the display panel 10 shown in FIG1 in that the structure and connection method of the auxiliary electrode 600 are different. For the remaining structures, reference may be made to the relevant description of FIG1 in the above embodiment and will not be repeated here.

[0122] For example, as shown in FIG11 , 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 portions 610 extend along a first direction X, the second auxiliary electrode portions 620 and the third auxiliary electrode portions 630 both extend along a second direction Y, the plurality of first auxiliary electrode portions 610 are sequentially spaced 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 via a first conductive element 6201, and the plurality of third auxiliary electrode portions 630 can be electrically connected via a 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, which is not limited in the embodiments of the present disclosure.

[0123] For example, as shown in FIG11 , 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 have signals applied to them independently. For example, the second electrodes 420 of a portion of the sub-pixels 200 in the display panel 40 are electrically connected via the first auxiliary electrode portion 610, the second electrodes 420 of another portion of the sub-pixels 200 are electrically connected via the second auxiliary electrode portion 620, and the second electrodes 420 of yet another portion of the sub-pixels 200 are electrically connected via 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 present disclosure are not limited thereto. With such an arrangement, different signals can be applied to the sub-pixels 200 to which they are electrically connected, respectively, via 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 turn-on voltage.

[0124] For example, as shown in FIG11 , 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 the present invention is not limited thereto.

[0125] It should be noted that the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel described herein are different from the first sub-pixel, the second sub-pixel, and the third sub-pixel in the above embodiments to describe different sub-pixels in the plurality of sub-pixels from different perspectives, and there is no conflict between the two. For example, the first sub-pixel can be one of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel, the second sub-pixel can be one of the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel, and the third sub-pixel can 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 can be the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel, respectively.

[0126] For example, as shown in FIG11 , 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, a first auxiliary electrode portion 610 is provided 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, multiple second color sub-pixels 2211 located in the same column are connected to the same second auxiliary electrode portion 620, and multiple 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 via the first auxiliary electrode portion 610, a plurality of second-color sub-pixels 2211 may receive the same electrical signal via the second auxiliary electrode portion 620, and a plurality of third-color sub-pixels 2311 may receive the same electrical signal via the third auxiliary electrode portion 630. For example, different signals may be applied to the first auxiliary electrode portion 610, the second auxiliary electrode portion 620, and the third auxiliary electrode portion 630, thereby separately controlling the second electrodes 420 of the sub-pixels 200 of different colors in the display panel 40, thereby meeting the different requirements of the sub-pixels 200 of different colors for turn-on voltages.

[0127] For example, as shown in FIG12 , the display panel 40 includes a planar layer 700 located on a side of the pixel defining portion 550 that is closer 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. The first auxiliary electrode portion 610 is located between the planar layer 700 and the base substrate 100 and in contact with 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 via a 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 via a second connection hole N2 in the pixel defining portion 550. The second electrode 420 of the third color sub-pixel 2311 is electrically connected to the third auxiliary electrode portion 630 via a third connection hole N3 in the pixel defining portion 550.

[0128] For example, as shown in FIG11 , 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 both the second auxiliary electrode portions 620 and the third auxiliary electrode portions 630 are located on a flat layer, it is advantageously possible to simplify the manufacturing process of the second auxiliary electrode portions 620 and the third auxiliary electrode portions 630 and to satisfy a reasonable layout of the layout space. For example, since the first auxiliary electrode portion 610 extends along the first direction X, by locating the first auxiliary electrode portion 610 on the side of the second auxiliary electrode portion 620 closer 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.

[0129] In some embodiments, when signals are independently applied to the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion, the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion may 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 base substrate increase sequentially. 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, thereby facilitating the isolation of the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion from each other. The embodiments of the present disclosure do not specifically limit the positions of the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion.

[0130] FIG13 is a schematic plan view of yet another display panel provided by at least one embodiment of the present disclosure.

[0131] For example, as shown in FIG13 , the display panel 50 differs from the display panel 40 shown in FIG11 in that the structure and connection method of the auxiliary electrode 600 are different. For the remaining structures, reference can be made to the relevant description of FIG11 in the above embodiment and will not be repeated here.

[0132] For example, as shown in Figure 13, 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.

[0133] For example, as shown in FIG13 , the display panel 50 includes a plurality of pixel unit columns 1231 and a plurality of pixel unit rows 1232. The second electrodes 420 of the sub-pixels 200 in the pixel unit column 1231 are connected to the same first sub-auxiliary electrode 670. For example, one 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. The 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 the plurality of second sub-pixels 220 and the 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 first sub-auxiliary electrodes 670 in the display panel 50 is equal to the number of 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 . The plurality of first sub-auxiliary electrodes 670 are electrically connected via the second sub-auxiliary electrode 680 to form an integrated structure, so that the same signal can be applied thereto.

[0134] FIG14 is a schematic plan view of yet another display panel provided by at least one embodiment of the present disclosure.

[0135] For example, as shown in FIG14 , the display panel 60 differs from the display panel 50 shown in FIG13 in that the number and connection method of the second sub-auxiliary electrodes 680 are different. For the remaining structure, reference can be made to the description of FIG13 in the above embodiment and are not described in detail here. For example, as shown in FIG14 , the display panel 60 may include a plurality of first sub-auxiliary electrodes 670 and a plurality of second sub-auxiliary electrodes 680. The connection method of the plurality of second sub-pixels 220 and the plurality of third sub-pixels 230 to the first sub-auxiliary electrodes 670 can be found in the description of FIG13 and are not described again here.

[0136] For example, as shown in FIG14 , the display panel 60 includes a plurality of pixel unit columns 1231 and a plurality of pixel unit rows 1232, and one 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 to form an integrated structure and are in a "mesh" 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, one 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 embodiments of the present disclosure do not limit the number of first sub-auxiliary electrodes 670 connected to the second auxiliary electrode member 680.

[0137] For example, as shown in FIG2 , the first charge generation layer 351 of 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 substrate 100 than the second light-emitting layer U2. As shown in FIG3C , the orthographic projection of the light-emitting region 2101 of the first sub-pixel 210 on the substrate falls within the orthographic projection of the first charge generation layer 2102 of the first sub-pixel 210 on the substrate, the orthographic projection of the light-emitting region 2201 of the second sub-pixel 220 on the substrate falls within the orthographic projection of the first charge generation layer 2202 of the second sub-pixel 220 on the substrate, and the orthographic projection of the light-emitting region 2301 of the third sub-pixel 230 on the substrate falls within the orthographic projection of the first charge generation layer 2302 of the third sub-pixel 230 on the substrate.

[0138] For example, as shown in Figure 3C, 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 an arrangement, the pixel density of the display panel can be improved to improve the clarity of the display image, thereby helping the display panel to have good display quality.

[0139] In some embodiments, the distance between the first charge generation layer of the first sub-pixel and the first charge generation layer of the third sub-pixel 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.

[0140] For example, as shown in Figure 3C, the orthographic projection of the light-emitting region 2101 of the first sub-pixel 210 on the substrate is a first rectangle F1, and the orthographic projection of the first charge generation 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. Therefore, 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 generation layer 2102 of the first sub-pixel 210 on the substrate.

[0141] For example, as shown in FIG3C , the width v of the first rectangle F1 is not less than 14 μm, and may be, for example, 15 μm, 16 μm, 17 μm, or 18 μm. The length h of the first rectangle F1 is not less than 50 μm, and may be, for example, 53 μm, 55 μm, 58 μm, or 60 μm. For example, the width a of the second rectangle F2 may 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 may be 52 μm to 60 μm, such as 52.0 μm, 54.0 μm, 56.0 μm, or 58.5 μm. This configuration maximizes the light-emitting area of ​​the first sub-pixel 210, thereby increasing the pixel aperture ratio of the first sub-pixel 210.

[0142] For example, referring to FIG11 , the first color sub-pixel 2111 has a first pixel aperture ratio, which can be the percentage of the orthogonal projection area of ​​the light-emitting region of the first color sub-pixel 2111 on the substrate to the orthogonal projection area of ​​the first charge generation layer on the substrate. For example, the second color sub-pixel 2211 has a second pixel aperture ratio, which can be the percentage of the orthogonal projection area of ​​the light-emitting region of the second color sub-pixel 2211 on the substrate to the orthogonal projection area of ​​the first charge generation layer on the substrate. The third color sub-pixel 2311 has a third pixel aperture ratio, which can be the percentage of the orthogonal projection area of ​​the light-emitting region of the third color sub-pixel 2311 on the substrate to the orthogonal projection area of ​​the first charge generation layer on the substrate.

[0143] 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 relatively low. Compared with this solution, the embodiment of the present disclosure 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, thereby extending the service life of the display panel.

[0144] For example, referring to Figure 11, the first pixel aperture ratio is greater than the second pixel aperture ratio, and the second pixel aperture ratio is greater than the third pixel aperture ratio. For example, the first pixel aperture ratio may be 1.69 to 2.80 times the third pixel aperture ratio, such as 1.70 times, 1.75 times, 1.95 times, 2.40 times, or 2.60 times. For example, the second pixel aperture ratio may be 1.4 to 1.8 times the third pixel aperture ratio, such as 1.4 times, 1.5 times, 1.6 times, 1.7 times, or 1.8 times. For example, the third pixel aperture ratio, the second pixel aperture ratio, and the first pixel aperture ratio may satisfy the following proportional relationship: 1:1.4:1.69, 1:1.4:2.4, or 1:1.8:2.8, but are not limited thereto.

[0145] 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 the sub-pixels with different light-emitting areas can be balanced, so that the overall brightness lifespan of the display panel is more uniform.

[0146] FIG. 3D is a schematic diagram showing the distribution of the brightness attenuation ratio of the display panel in FIG. 1 .

[0147] For example, as shown in Figure 3D, the distribution curve of the brightness attenuation ratio when the light-emitting functional layer in the display panel is manufactured using a photolithography process is M10, and the distribution curve of the brightness attenuation ratio when the light-emitting functional layer in the display panel is manufactured using a high-precision metal mask (FMM) is M20. As shown in Figure 3D, when the light-emitting functional layer is manufactured using a photolithography process, the time corresponding to the brightness attenuation ratio of the display panel reaching 95% is approximately 9000 hours; when the light-emitting functional layer is manufactured using a high-precision metal mask (FMM), the time corresponding to the brightness attenuation ratio of the display panel reaching 95% is approximately 3000 hours. This shows that using a photolithography process to manufacture the light-emitting functional layer is beneficial to extending the life of the display panel.

[0148] For example, as shown in FIG2 , the first charge generation layer 351 in the light-emitting functional layer 300 of the sub-pixel includes a first host material and a first dopant material, and the mass percentage of the first dopant material in the first charge generation layer 351 is 12% to 18%, for example, 13%, 15%, 16%, or 18%. For example, the first host material in the first charge generation layer 351 includes a triaromatic amine compound, and the first dopant material includes a lithium quinoline complex, but is not limited thereto. For example, when the mass percentage of the first dopant material in the first charge generation layer 351 is increased, the brightness life of the display panel is improved.

[0149] By increasing the mass percentage of the first doping material in the first charge generation layer to 12% to 18%, the brightness and life of the display panel can be improved, thereby facilitating optimization of the display effect.

[0150] For example, as shown in Figures 1 and 2, the mass percentages of the first dopant material in the first charge generation layer 351 of sub-pixels 200 emitting light of different colors can 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 dopant material in the first charge generation layer 351 of the first sub-pixel 210 has a first mass percentage, the first dopant material in the first charge generation layer 351 of the second sub-pixel 220 has a second mass percentage, and the first dopant 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.

[0151] For example, as shown in Figures 1 and 2, since the proportions of green light, red light and blue light in white light decrease in sequence, 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 in sequence, 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.

[0152] For example, as shown in FIG2 , 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. The second charge generation layer 352 includes a second host material and a second dopant material. The mass percentage of the second dopant 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 host material includes 1,2,4-triazole, and the second dopant material includes lithium, beryllium, or boron, but is not limited thereto. For example, when the mass percentage of the second dopant material in the second charge generation layer 352 of the sub-pixel is increased, the luminous efficiency of the sub-pixel is improved.

[0153] By increasing the mass percentage of the second doping material in the second charge generation layer to 3% to 6%, the luminous efficiency of the sub-pixel can be improved, thereby optimizing the display effect.

[0154] In some embodiments, as shown in Figures 1 and 2, 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, resulting 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 making the luminous efficiency of the first sub-pixel 210 lower than the luminous efficiency of the second sub-pixel 220 and the third sub-pixel 230.

[0155] For example, as shown in FIG1 , when the first subpixel 210 is configured to emit blue light, the second subpixel 220 is configured to emit green light, and the third subpixel 230 is configured to emit red light, the second dopant material in the second charge generation layer 352 of the first subpixel 210 has a fourth mass percentage, the second dopant material in the second charge generation layer 352 of the second subpixel 220 has a fifth mass percentage, and the second dopant material in the second charge generation layer 352 of the third subpixel 230 has a sixth mass percentage, and both the fifth mass percentage and the sixth mass percentage are less than the fourth mass percentage. For example, the fifth mass percentage and the sixth mass percentage can be substantially the same.

[0156] 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.

[0157] For example, as shown in FIG2 , 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, and the first electron transport layer ETL-1 is located between the first hole blocking layer HBL-1 and the electron injection layer Yb, with the first hole blocking layer HBL-1 being 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 that is closer to the first electrode 410, with the hole injection layer HIL being 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, with the second hole blocking layer HBL-2 ​​being 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.

[0158] For example, as shown in Figure 2, 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 can be 300 to 400 angstroms, such as 300 angstroms, 380 angstroms, or 400 angstroms. For example, the thickness of the second electrode 420 can 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 can be 10 to 30 angstroms, such as 10 angstroms, 20 angstroms, or 30 angstroms. For example, the thickness of the light extraction layer CPL can 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 can be 600 to 900 angstroms, such as 600 angstroms, 720 angstroms, 800 angstroms, or 900 angstroms.

[0159] For example, as shown in FIG2 , the first light-emitting layer U1 of the sub-pixel includes a first sub-light-emitting layer U11 and a first adjustment layer U12. 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. The second sub-light-emitting layer U21 is farther away from the first electrode 410 than the second adjustment layer U22.

[0160] For example, as shown in FIG11 and FIG2 , the first color sub-pixel 2111, the second color sub-pixel 2211, and the third color sub-pixel 2311 emit light of different colors. 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 both 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 both 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.

[0161] By setting the thickness of each of the above-mentioned film layers of the sub-pixel within an appropriate 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.

[0162] FIG15 is a schematic diagram of the structure of a display panel; FIG16 is a schematic diagram of the color gamut distribution of the display panel in FIG15; and FIG17 is a schematic diagram of the spectrum curve distribution of the display panel in FIG15.

[0163] For example, as shown in Figure 15, 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 set. 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.

[0164] For example, in the display panel shown in FIG15 , the first sub-pixel 210 functions as a blue sub-pixel, and the thickness of its first and second sub-light-emitting layers is 100 angstroms, while the thickness of the first and second adjustment layers is 180 angstroms. The mass percentage of the first dopant material in the first charge generation layer 351 is 10.0%. For example, the second sub-pixel 220 functions as a green sub-pixel, and the thickness of its first and second sub-light-emitting layers is 120 angstroms, while the thickness of the first and second adjustment layers is 400 angstroms. For example, the third sub-pixel 230 functions as a red sub-pixel, and the thickness of its first and second sub-light-emitting layers is 390 angstroms, while the thickness of the first and second adjustment layers is 500 angstroms.

[0165] For example, as shown in FIG16 , when the display panel has a grayscale of 255, the color gamut distribution result is R1, and the overall color gamut value is 103%. When the display panel has a grayscale of 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 of 255 is 7%. When the grayscale is 255, the color gamut value of the first sub-pixel 210 is E3, and the deviation ΔBy between it and the color gamut value at the grayscale of 8 is 0.023. The color gamut value of the second sub-pixel 220 is E2, and the deviation ΔGx between it and the color gamut value at the grayscale of 8 is 0.003. The color gamut value of the third sub-pixel 230 is E1, and the deviation ΔRx between it and the color gamut value at the grayscale of 8 is 0.013.

[0166] As shown in Figures 15 to 17 , the deviation ΔBy between the color gamut values ​​of the first sub-pixel 210 at grayscale levels 255 and 8 is large. Consequently, at low grayscale levels (e.g., low brightness), the display quality of the display panel is significantly affected by crosstalk from the first sub-pixel 210. For example, as shown in Figure 17 , when the first sub-pixel 210 is illuminated alone, the spectrum curve has a peak corresponding to red light at a wavelength of 600nm to 650nm, so the third sub-pixel 230 may also emit light.

[0167] Figure 18 is a schematic diagram of the structure of another display panel; Figure 19 is a schematic diagram of the color gamut distribution of the display panel in Figure 18; Figure 20 is a schematic diagram of the spectral curve distribution of the display panel in Figure 18; Figure 21 is a schematic diagram of the brightness attenuation ratio distribution of the display panel in Figure 18.

[0168] For example, compared to the display panel shown in FIG15 , the display panel shown in FIG18 differs in that the first charge generation layers of adjacent sub-pixels are spaced apart from each other. For example, the first charge generation layer of third sub-pixel 230 is spaced apart from the first charge generation layer of second sub-pixel 220, and the first charge generation layer of second sub-pixel 220 is spaced apart from the first charge generation layer of first sub-pixel 210. As shown in FIG18 , the mass percentage of the first dopant material in first charge generation layer 351 is 15.0%. For other structures of the display panel shown in FIG18 , please refer to the description of FIG15 in the above embodiment and will not be repeated here.

[0169] For example, as shown in FIG19 , when the display panel has a grayscale of 255, the color gamut distribution result is R1, and the overall color gamut value is 103%. When the display panel has a grayscale of 8, the color gamut distribution result is R2, and the overall color gamut value is 98%, which means that the deviation from the overall color gamut at grayscale 255 is 5%. When the grayscale is 255, the color gamut value of the first sub-pixel 210 is E3, and the deviation ΔBy between it and the color gamut value at grayscale 8 is 0.017. The color gamut value of the second sub-pixel 220 is E2, and the deviation ΔGx between it and the color gamut value at grayscale 8 is 0.002. The color gamut value of the third sub-pixel 230 is E1, and the deviation ΔRx between it and the color gamut value at grayscale 8 is 0.001.

[0170] This shows that, compared to the results shown in FIG16 , spacing the first charge generation layers of adjacent sub-pixels can reduce the deviation between the color gamut values ​​of the sub-pixels in the display panel at grayscale levels of 255 and 8. Furthermore, as shown in FIG20 , when the first sub-pixel is illuminated alone, the peak of the spectral curve corresponding to red light at a wavelength of 600 nm to 650 nm is significantly reduced, thereby reducing the probability of crosstalk between the first and third sub-pixels.

[0171] For example, as shown in Figure 21, 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. According to Figure 21, when the mass percentage of the first doping material in the first charge generation layer is increased to 15.0%, when the brightness attenuation ratio is 96%, the time corresponding to the distribution curve R3 of the brightness attenuation ratio can be increased by about 800 hours compared with the time corresponding to the distribution curve R4 of the brightness attenuation ratio.

[0172] FIG22 is a schematic diagram of the structure of another display panel; FIG23 is a schematic diagram of the color gamut distribution of the display panel in FIG22; and FIG24 is a schematic diagram of the spectrum curve distribution of the display panel in FIG22.

[0173] For example, compared to the display panel shown in FIG18 , the display panel shown in FIG22 differs in that the second charge generation layers 352 of adjacent sub-pixels are spaced apart from each other. For example, the second charge generation layer 352 of the third sub-pixel 230 is spaced apart 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 spaced apart from the second charge generation layer 352 of the first sub-pixel 210. As shown in FIG22 , the mass percentage of the second dopant material in the second charge generation layer 352 is 4.0%. For other structures of the display panel shown in FIG22 , please refer to the description of FIG18 in the above embodiment and will not be repeated here.

[0174] For example, as shown in FIG23 , when the display panel has a grayscale of 255, the color gamut distribution result is R1, and the overall color gamut value is 103%. When the display panel has a grayscale of 8, the color gamut distribution result is R2, and the overall color gamut value is 100%, which means that the deviation from the overall color gamut at grayscale 255 is 3%. When the grayscale is 255, the color gamut value of the third sub-pixel 230 is E1, and the deviation ΔRx between it and the color gamut value at grayscale 8 is 0.002. The color gamut value of the second sub-pixel 220 is E2, and the deviation ΔGx between it and the color gamut value at grayscale 8 is 0.001. The color gamut value of the first sub-pixel 210 is E3, and the deviation ΔBy between it and the color gamut value at grayscale 8 is 0.017.

[0175] It can be seen that compared with the results shown in Figure 19, spacing the second charge generation layers of adjacent sub-pixels from each other can further reduce the deviation of the overall color gamut of the sub-pixels of the display panel at grayscale levels of 255 and 8, respectively. At the same time, as shown in Figure 24, when the first sub-pixel is illuminated alone, the peak of the spectral 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, in the display panels in Figures 15 and 18, the mass percentage of the second doping material in the second charge generation layer is 2.0%), the luminous efficiency of the display panel can be increased by 10%.

[0176] The embodiments of the present disclosure further provide 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 reflected in the display device, which will not be described in detail here.

[0177] 25 to 32 are structural schematic diagrams corresponding to the manufacturing process of the display panel shown in FIG. 18 .

[0178] For example, as shown in Figures 25 and 26, the method for manufacturing a 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 a plurality of sub-pixels, and making the first electrodes 410 of adjacent sub-pixels spaced apart from each other.

[0179] For example, as shown in FIG25 , the method for manufacturing a display panel further includes forming a first partial film layer 3101 in the light-emitting functional layer. For example, as shown in FIG2 and FIG18 , the 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, all film layers in the first partial film layer 3101 except the second light-emitting layer U2 are arranged as a uniform layer.

[0180] For example, as shown in FIG. 25 , the method for manufacturing a display panel further includes forming a first optical adhesive layer 3120 on the first partial film layer 3101 .

[0181] For example, as shown in FIG26 , the first optical adhesive layer 3120 is photolithographically processed so that portions of the first optical adhesive layer 3120 corresponding to sub-pixels of a specific color are removed. For example, FIG26 illustrates the removal of a portion of the first optical adhesive layer 3120 corresponding to the third sub-pixel 230 emitting red light, but the embodiments of the present disclosure are not limited thereto. In some embodiments, a portion of the first sub-pixel 210 emitting blue light in the first optical adhesive layer 3120 may also be removed, or a portion of the second sub-pixel 220 emitting green light in the first optical adhesive layer 3120 may be removed. For example, as shown in FIG26 , portions of the first 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 remain.

[0182] For example, as shown in FIG. 27 , the method for manufacturing a display panel further includes: forming a first charge generation layer 351 on the first portion of the optical adhesive layer 10110 .

[0183] For example, as shown in FIG28 , the method for manufacturing a display panel further includes performing a photolithography process on the first charge generation layer 351 to remove portions of the first charge generation layer 351 corresponding to the first sub-pixel 210 and the second sub-pixel 220, while retaining portions of the first charge generation layer 351 corresponding to the third sub-pixel 230. Simultaneously, portions of the first optical adhesive layer 3120 corresponding to the second sub-pixel 220 emitting green light and the first portion of the optical adhesive layer 10110 (see FIG27 ) corresponding to the first sub-pixel 210 emitting blue light are removed, thereby forming the first charge generation layer 351 for the third sub-pixel 230.

[0184] For example, as shown in Figures 29 and 30, a second optical adhesive layer 3130 is formed on the first charge generation layer 351 of the third sub-pixel 230. Then, a photolithography process is performed on the second optical adhesive layer 3130 so that a second portion of the optical adhesive layer 31301 corresponding to the first sub-pixel 210 and the third sub-pixel 230 remains in the second optical adhesive layer 3130, and a portion of the second optical adhesive layer 3130 corresponding to the second sub-pixel 220 is removed.

[0185] For example, as shown in Figures 31 and 32, a first charge generation layer 351 is formed on the second portion of the optical adhesive layer 31301. For ease of understanding, the re-formed first charge generation layer 351 is labeled the same. Then, the re-formed first charge generation layer 351 is photolithographically removed, removing the portions corresponding to the first sub-pixel 210 and the third sub-pixel 230, while retaining the portion corresponding to the second sub-pixel 220. Simultaneously, 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, thereby forming the first charge generation layer 351 for the second sub-pixel 220. As shown in Figure 32, the first charge generation layer 351 for the second sub-pixel 220 is spaced apart from the first charge generation layer 351 for the third sub-pixel 230.

[0186] Similarly, referring to Figures 29 to 32, the 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. The specific steps are not repeated here.

[0187] For example, referring to FIG18 , the method for manufacturing a display panel may further include forming a first hole transport layer HTL-1, a first light-emitting layer U1 of a 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 will not be elaborated here.

[0188] 33 to 43 are schematic structural diagrams of a manufacturing process of a display panel provided by at least one embodiment of the present disclosure.

[0189] For example, as shown in FIG33 , a base substrate 100 is provided. The material of the base substrate 100 can refer to conventional materials and is not limited here.

[0190] For example, as shown in FIG34 , 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.

[0191] It should be noted that although the light-emitting elements corresponding to each sub-pixel are mentioned in Figure 34, since each light-emitting element includes many stacked structures, it cannot be shown in this step. Therefore, only the formation of the pixel circuit 900 is shown in this step.

[0192] 35 , the first electrode 410 is patterned and formed to divide adjacent sub-pixels by the first electrode 410 , so that each first electrode 410 corresponds to one sub-pixel.

[0193] For example, as shown in FIG36 , a pixel defining portion 550 is patterned to define the light-emitting regions of the sub-pixels. The pixel defining portion 550 includes a plurality of openings 510, and the pixel defining portion 550 surrounds the openings 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.

[0194] For example, as shown in FIG37A , 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 multiple stacked film layers, such as the multiple film layers shown in FIG2 , but this is not limited in the embodiments of the present disclosure.

[0195] 37B , a first photoresist layer 1610 is formed on the first blocking 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 and will not be described in detail herein.

[0196] 37B to 37C , the first blocking layer 1510 is patterned using the first photoresist layer 1610 as a mask to form a first blocking structure 11510. For example, in the structure shown in FIG 37C , the first blocking structure 11510 only covers the area corresponding to the leftmost sub-pixel.

[0197] For example, as shown in FIG37D , the first photoresist layer 1610 on the side of the first blocking structure 11510 away from the substrate 100 is removed.

[0198] For example, as shown in Figures 37D to 37E, the first light-emitting functional layer 1310 and the second electrode first film layer 1420 are patterned using the first blocking structure 11510 as a mask to form the light-emitting functional layer 11310 and the second electrode 11420 corresponding to the first sub-pixel.

[0199] For example, as shown in FIG38A , 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 .

[0200] For example, as shown in FIG. 38B , a second photoresist layer 1620 is formed on the second blocking layer 1520 and at a position corresponding to the second opening 1220 .

[0201] For example, as shown in Figures 38B-38C, 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 this embodiment of the present disclosure will not be further described.

[0202] For example, as shown in FIG. 38C to FIG. 38D , the second photoresist layer 1620 on the side of the second blocking structure 11520 away from the base substrate 100 is removed.

[0203] For example, as shown in Figures 38D to 38E, the second light-emitting functional layer 2310 and the second electrode first film layer 2420 are composed using the second blocking 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 blocking structure 11510 is removed.

[0204] For example, as shown in FIG39 , 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 away from the base substrate 100 .

[0205] For example, as shown in FIG. 40 , a third photoresist layer 1630 is formed on the third blocking layer 1530 and at a position corresponding to the third opening 1230 .

[0206] For example, as shown in FIG. 40 and FIG. 41 , the third photoresist layer 1630 is used as a mask to remove the portion of the third blocking layer 1530 except for the portion corresponding to the third opening 1230 , so as to form a third blocking structure 11530 corresponding to the third opening 1230 .

[0207] For example, as shown in FIG. 41 and FIG. 42 , the third photoresist layer 1630 on the side of the third blocking structure 11530 away from the base substrate 100 is removed.

[0208] For example, as shown in FIG. 42 and FIG. 43 , the third light-emitting functional layer 3310 and the second electrode first film layer 3420 are patterned using the third blocking structure 11530 as a mask to form the light-emitting functional layer 31310 and the second electrode 31420 corresponding to the third sub-pixel.

[0209] 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 .

[0210] For example, in some embodiments, referring to FIG7 , before the step corresponding to FIG36 , the method for manufacturing a display panel provided by an embodiment of the present disclosure further includes forming a plurality of auxiliary electrodes 600, and positioning the auxiliary electrodes 600 in the spaces between the first electrodes 410 of adjacent sub-pixels. After the auxiliary electrodes 600 are formed, the steps following FIG36 are performed.

[0211] For example, in some embodiments, referring to FIG8 , before the step corresponding to FIG35 , the method for manufacturing a display panel provided by the embodiments of the present disclosure further includes: forming a plurality of auxiliary electrodes 600, and forming a planarization layer 700, such that the planarization layer 700 covers the auxiliary electrodes 600. After the planarization layer 700 is formed, the steps shown in FIG35 and thereafter are continued.

[0212] 44 to 46 are schematic structural diagrams of another display panel manufacturing process provided by at least one embodiment of the present disclosure.

[0213] For example, in some embodiments, referring to FIG1 , the steps corresponding to FIG37A to FIG43 may not include the step of forming the second electrode corresponding to each sub-pixel 200, and may only include the steps of fabricating the light-emitting functional layer for each sub-pixel 200. For example, the arrangement and patterning of 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 included. For example, the second electrode of each sub-pixel may be formed in steps subsequent to FIG43 . For this solution, the structure formed after completing the steps corresponding to FIG43 can be seen in FIG44 .

[0214] For example, in some embodiments, as shown in FIG45 , after forming the light-emitting functional layer 310 of each sub-pixel 200, the method for manufacturing the display panel further 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 embodiments and will not be repeated here.

[0215] For example, as shown in FIG46 , the method for manufacturing a display panel further includes forming an insulating pattern 800 , and positioning at least a portion of the insulating pattern 800 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.

[0216] For example, referring to Figure 1, after completing the production of the insulating pattern 800, the production method of the display panel also includes: forming the second electrode 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.

[0217] There are a few points to note:

[0218] (1) The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures can refer to general designs.

[0219] (2) In the absence of conflict, features in the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0220] The foregoing description is merely an exemplary embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. The scope of protection of the present disclosure is determined by the appended claims.

Claims

1. A display panel, comprising: substrate; a plurality of sub-pixels located on the base substrate, the sub-pixels including a light-emitting element, the light-emitting element including 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 being closer to the base substrate than the second electrode, the first electrodes of adjacent sub-pixels being spaced apart from each other, and the plurality of sub-pixels including 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 area 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 of the sub-pixels are electrically connected via the auxiliary electrodes.

2. The display panel according to claim 1, wherein 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, wherein: Adjacent auxiliary electrodes are spaced apart from each other.

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

5. The display panel according to claim 3, wherein: 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 portion of the plurality of sub-pixels are electrically connected via the first auxiliary electrode portion, the second electrodes of another portion of the plurality of sub-pixels are electrically connected via the second auxiliary electrode portion, and the second electrodes of yet another portion of the plurality of sub-pixels are electrically connected via the third auxiliary electrode portion. Signals are independently applied to the first auxiliary electrode portion, the second auxiliary electrode portion, and the third auxiliary electrode portion. The display panel according to claim 5 , wherein: 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, wherein: 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.

8. The display panel according to claim 7, wherein: The display panel further includes a planar layer, the planar layer being located on a side of the pixel defining portion close to the base substrate, the first auxiliary electrode portion being located between the planar layer and the base substrate, and the second auxiliary electrode portion and the third auxiliary electrode portion being 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, wherein: 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.

10. The display panel according to claim 9, wherein: 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 of the at least some 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, wherein: 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 any one of claims 9 to 11, wherein: 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, wherein: The auxiliary electrode is partially covered by the pixel defining portion, and the second electrode of any sub-pixel in the at least part 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, wherein: The display panel further includes a planar layer, the planar layer being located on a side of the pixel defining portion close to the base substrate, and the auxiliary electrode being partially covered by the planar layer. The second electrode of any sub-pixel in the at least part 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, wherein: The plurality of sub-pixels further include a third sub-pixel, wherein 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, 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 a second direction. 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, wherein: The plurality of auxiliary electrodes include a plurality of first sub-auxiliary electrodes and a second sub-auxiliary electrode, 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 16, wherein: 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, 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 electrodes in the direction perpendicular to the substrate is 1μm to 2μm.

18. The display panel according to claim 3, wherein: 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, wherein: The light-emitting functional layer of the sub-pixel includes a first light-emitting layer, a first charge generation layer, and a second light-emitting layer stacked in a direction perpendicular to the base substrate, wherein the first charge generation 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, wherein 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%.

21. The display panel according to claim 20, wherein: The mass percentages of the first doping material in the first charge generation layer of sub-pixels emitting light of different colors are different.

22. The display panel according to any one of claims 19 to 21, wherein: 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.

23. The display panel according to any one of claims 19 to 22, wherein: 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 within 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.

24. The display panel according to any one of claims 19 to 23, wherein: The light-emitting functional layer of the sub-pixel further includes a second charge generation layer, and the second charge generation layer is located between the first charge generation layer and the second light-emitting layer. The second charge generation layer includes a second host material and a second doping material, and the mass percentage of the second doping material in the second charge generation layer of the first sub-pixel is 3% to 6%.

25. The display panel according to claim 24, wherein: The second host material includes 1,2,4-triazole, and the second doping material includes lithium, beryllium or boron.

26. The display panel according to claim 6, wherein: The first color sub-pixel has a first pixel aperture ratio, the second color sub-pixel has a second pixel aperture ratio, and the third color sub-pixel has a third pixel aperture ratio. The first pixel aperture ratio is greater than the second pixel aperture ratio, and the second pixel aperture ratio is greater than the third pixel aperture ratio.

27. The display panel according to claim 26, wherein: The second pixel aperture ratio is 1.4 to 1.8 times the third pixel aperture ratio, and the first pixel aperture ratio is 1.69 to 2.80 times the third pixel aperture ratio; and / or the first pixel aperture ratio, the second pixel aperture ratio and the third pixel aperture ratio are all 45% to 65%.

28. The display panel according to claim 24 or 25, wherein: The light-emitting functional layer further 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 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 generation 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, and the first sub-light-emitting layer is farther away from the base 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, and the second sub-light-emitting layer is farther away from the base substrate than the second adjustment layer.

29. The display panel according to claim 28, wherein: The thickness of the hole injection layer of the sub-pixel is 100 to 200 angstroms, the thickness of the first hole transport layer and the second hole transport layer are both 300 to 700 angstroms, the thickness of the first charge generation layer is 500 to 700 angstroms, the thickness of the second charge generation layer is 100 to 300 angstroms, the thickness of the first hole blocking layer and the second hole blocking layer are both 50 to 150 angstroms, the thickness of the first electron transport layer and the second electron transport layer are both 300 to 400 angstroms, the thickness of the second electrode is 100 to 300 angstroms, the thickness of the electron injection layer is 10 to 30 angstroms, the thickness of the light extraction layer is 700 to 1200 angstroms, and the thickness of the buffer layer is 600 to 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 that emit light of different colors. 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 to 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 both 100 to 300 angstroms, and the thicknesses of the first adjustment layer and the second adjustment layer of the second color sub-pixel are both 300 to 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 both 300 to 500 angstroms, and the thicknesses of the first adjustment layer and the second adjustment layer of the third color sub-pixel are both 500 to 700 angstroms.

30. A display device comprising the display panel according to any one of claims 1 to 29.

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