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, the disclosure of which is incorporated herein in its entirety as part of the present application. TECHNICAL FIELD

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

[0003] Organic light emitting diode (OLED) display products have the advantages of lightness, wide viewing angle, foldability, simple production process, low cost, etc. At the same time, the response speed is fast, the energy consumption is small, the driving voltage is low, and the working temperature range is wide, and the light emitting efficiency is high.

[0004] At present, OLED display products have become the mainstream display technology of modern times, which can realize active light emission, and the light emission color is continuously adjustable. For example, a tandem organic light emitting display device can improve the service life and brightness of the light emitting device and reduce the power consumption of the light emitting device by adding at least one light emitting layer and a charge generating layer. SUMMARY

[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 substrate, a plurality of sub-pixels and a pixel defining portion, the plurality of sub-pixels are located on the substrate, the sub-pixel comprises a light emitting element, the light emitting element comprises a light emitting functional layer, and a first electrode and a second electrode located on both sides of the light emitting functional layer, the first electrode is closer to the substrate than the second electrode, the first electrodes of adjacent sub-pixels are spaced apart from each other, the plurality of sub-pixels comprise first sub-pixels and second sub-pixels adjacent to each other; the pixel defining portion is located between the light emitting functional layer and the substrate, the pixel defining portion comprises a plurality of openings, the openings are configured to expose at least part of the first electrode of the sub-pixel to define a 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 further comprises a plurality of auxiliary electrodes located on the substrate, and the second electrodes of at least part of the sub-pixels are electrically connected through the auxiliary electrodes.

[0007] According to at least one embodiment of the present disclosure, the display panel is provided, and a normal projection of the auxiliary electrode on the substrate substrate at least partially overlaps with a normal projection of the pixel boundary portion on the substrate substrate.

[0008] According to at least one embodiment of the present disclosure, the display panel is provided, and adjacent auxiliary electrodes are arranged at intervals.

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

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

[0011] According to at least one embodiment of the present disclosure, the display panel is provided, and the plurality of sub-pixels include first color sub-pixels, second color sub-pixels, and third color sub-pixels emitting light of different colors, a light-emitting functional layer of the first color sub-pixels, a light-emitting functional layer of the second color sub-pixels, and a light-emitting functional layer of the third color sub-pixels are arranged at intervals, and a second electrode of the first color sub-pixels, a second electrode of the second color sub-pixels, and a second electrode of the third color sub-pixels are arranged at intervals.

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

[0013] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0014] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0015] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0016] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0017] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0018] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0019] The display panel provided by at least one embodiment of the present disclosure further includes a flat layer located on the side of the pixel defining part close to the substrate substrate, the first auxiliary electrode part is located between the flat layer and the substrate substrate, the second auxiliary electrode part and the third auxiliary electrode part are both located between the pixel defining part and the flat layer, the second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode part through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode part through a second connecting hole in the pixel defining part, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode part through a third connecting hole in the pixel defining part.

[0020] According to at least one embodiment of the present disclosure, the display panel further comprises a third sub-pixel, a light-emitting functional layer of the third sub-pixel, a light-emitting functional layer of the first sub-pixel, and a light-emitting functional layer of the second sub-pixel are arranged at intervals, a second electrode of the third sub-pixel, a second electrode of the first sub-pixel, and a 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 comprises a plurality of pixel units, 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, wherein a plurality of first sub-pixels in the pixel unit column are arranged at intervals in the second direction, and a plurality of second sub-pixels and a plurality of third sub-pixels in the pixel unit column are arranged alternately in the second direction.

[0021] According to at least one embodiment of the present disclosure, the display panel further comprises a third sub-pixel, a light-emitting functional layer of the third sub-pixel, a light-emitting functional layer of the first sub-pixel, and a light-emitting functional layer of the second sub-pixel are arranged at intervals, a second electrode of the third sub-pixel, a second electrode of the first sub-pixel, and a 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 comprises a plurality of pixel units, 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, wherein a plurality of first sub-pixels in the pixel unit column are arranged at intervals in the second direction, and a plurality of second sub-pixels and a plurality of third sub-pixels in the pixel unit column are arranged alternately in the second direction.

[0022] According to at least one embodiment of the present disclosure, the display panel further comprises a third sub-pixel, a light-emitting functional layer of the third sub-pixel, a light-emitting functional layer of the first sub-pixel, and a light-emitting functional layer of the second sub-pixel are arranged at intervals, a second electrode of the third sub-pixel, a second electrode of the first sub-pixel, and a 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 comprises a plurality of pixel units, 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, wherein a plurality of first sub-pixels in the pixel unit column are arranged at intervals in the second direction, and a plurality of second sub-pixels and a plurality of third sub-pixels in the pixel unit column are arranged alternately in the second direction.

[0023] According to at least one embodiment of the present disclosure, the display panel further comprises a third sub-pixel, a light-emitting functional layer of the third sub-pixel, a light-emitting functional layer of the first sub-pixel, and a light-emitting functional layer of the second sub-pixel are arranged at intervals, a second electrode of the third sub-pixel, a second electrode of the first sub-pixel, and a 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 comprises a plurality of pixel units, 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, wherein a plurality of first sub-pixels in the pixel unit column are arranged at intervals in the second direction, and a plurality of second sub-pixels and a plurality of third sub-pixels in the pixel unit column are arranged alternately in the second direction.

[0024] According to at least one embodiment of the present disclosure, the display panel further comprises a third sub-pixel, a light-emitting functional layer of the third sub-pixel, a light-emitting functional layer of the first sub-pixel, and a light-emitting functional layer of the second sub-pixel are arranged at intervals, a second electrode of the third sub-pixel, a second electrode of the first sub-pixel, and a 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 comprises a plurality of pixel units, 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, wherein a plurality of first sub-pixels in the pixel unit column are arranged at intervals in the second direction, and a plurality of second sub-pixels and a plurality of third sub-pixels in the pixel unit column are arranged alternately in the second direction.

[0025] 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] The display panel provided by at least one embodiment of the present disclosure, the mass percentage of the first doping material in the first charge generation layer of the sub-pixel emitting different colors of light is different.

[0027] 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 triarylamine compound, and the first doping material includes a lithium quinoline complex.

[0028] The display panel provided by at least one embodiment of the present disclosure, the orthographic projection of the light-emitting region of the first sub-pixel on the substrate is a first rectangle, the orthographic projection of the first charge generation layer of the first sub-pixel on the substrate is a second rectangle, the first rectangle falls in 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] The display panel provided by at least one embodiment of the present disclosure, the light-emitting functional layer of the sub-pixel further 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 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%.

[0030] 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] 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, 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 at least one embodiment of the present disclosure, the second pixel aperture ratio is 1.4-1.8 times the third pixel aperture ratio, and the first pixel aperture ratio is 1.69-2.80 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%-65%.

[0033] According to at least one embodiment of the present disclosure, the light-emitting functional layer further comprises 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 along a direction perpendicular to the substrate, and the display panel further comprises a light extraction layer and a buffer layer, wherein the first hole transport layer is 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 between the first light-emitting layer and the second electrode, the first electron transport layer is 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 on a side of the second light-emitting layer closer 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 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 on a 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 comprises a first sub-light-emitting layer and a first adjustment layer, and the first sub-light-emitting layer is farther from the substrate than the first adjustment layer, and the second light-emitting layer of the sub-pixel comprises a second sub-light-emitting layer and a second adjustment layer, and the second sub-light-emitting layer is farther 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 100-200 angstroms, the thickness of the first hole transport layer and the second hole transport layer is 300-700 angstroms, the thickness of the first charge generation layer is 500-700 angstroms, the thickness of the second charge generation layer is 100-300 angstroms, the thickness of the first hole blocking layer and the second hole blocking layer is 50-150 angstroms, the thickness of the first electron transport layer and the second electron transport layer is 300-400 angstroms, the thickness of the second electrode is 100-300 angstroms, the thickness of the electron injection layer is 10-30 angstroms, the thickness of the light extraction layer is 700-1200 angstroms, the thickness of the buffer layer is 600-900 angstroms, the plurality of sub-pixels of the display panel include a first color sub-pixel, a second color sub-pixel and a third color sub-pixel emitting light of different colors, and the thickness of the first sub-emitting layer, the second sub-emitting layer, the first adjusting layer and the second adjusting layer of the first color sub-pixel is 100-200 angstroms; the thickness of the first sub-emitting layer and the second sub-emitting layer of the second color sub-pixel is 100-300 angstroms, and the thickness of the first adjusting layer and the second adjusting layer of the second color sub-pixel is 300-500 angstroms; the thickness of the first sub-emitting layer and the second sub-emitting layer of the third color sub-pixel is 300-500 angstroms, and the thickness of the first adjusting layer and the second adjusting layer of the third color sub-pixel is 500-700 angstroms.

[0035] The display device provided by at least one embodiment of the present disclosure also includes the display panel provided by any one of the above embodiments. BRIEF DESCRIPTION OF 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 are only related to some embodiments of the present disclosure, but not limit the present disclosure.

[0037] FIG. 1 is a partial cross-sectional schematic view of a display panel provided by at least one embodiment of the present disclosure.

[0038] FIG. 2 is a partial structural schematic view of a display panel provided by at least one embodiment of the present disclosure.

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

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

[0041] FIG. 3C is a partial structural schematic view of a pixel unit in the display panel of FIG. 3A.

[0042] FIG. 3D is a distribution schematic view of the luminance decay ratio of the display panel in FIG. 1.

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

[0044] FIG. 5A is a schematic view of a partial cross-section of another display panel, according to at least one embodiment of the present disclosure.

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

[0046] FIG. 6 is a schematic view of a partial cross-section of yet another display panel, according to at least one embodiment of the present disclosure.

[0047] FIG. 7 is a schematic view of a partial cross-section of yet another display panel, according to at least one embodiment of the present disclosure.

[0048] FIG. 8 is a schematic view of a partial cross-section of yet another display panel, according to at least one embodiment of the present disclosure.

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

[0050] FIG. 10 is an enlarged schematic view of the auxiliary electrode in FIG. 9.

[0051] FIG. 11 is a plan view of yet another display panel, according to at least one embodiment of the present disclosure.

[0052] FIG. 12 is a schematic view of a partial cross-section of the display panel in FIG. 11.

[0053] FIG. 13 is a plan view of yet another display panel, according to at least one embodiment of the present disclosure.

[0054] FIG. 14 is a plan view of yet another display panel, according to at least one embodiment of the present disclosure.

[0055] FIG. 15 is a schematic view of a structure of a display panel.

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

[0057] FIG. 17 is a schematic view of a spectral curve distribution of the display panel in FIG. 15.

[0058] FIG. 18 is a schematic view of a structure of another display panel.

[0059] FIG. 19 is a schematic view of a color gamut distribution of the display panel in FIG. 18.

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

[0061] FIG. 21 is a schematic view of a brightness decay ratio distribution of the display panel in FIG. 18.

[0062] FIG. 22 is a structural schematic diagram of yet another display panel.

[0063] FIG. 23 is a color gamut distribution schematic diagram of the display panel in FIG. 22.

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

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

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

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

[0068] In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0069] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as having the common meaning in the field of the present disclosure to which they belong. The terms “first”, “second”, and similar terms used in the present disclosure do not indicate any order, number, or importance, but are only used to distinguish different components. The terms “include” or “contain” and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects.

[0070] The features “parallel”, “perpendicular”, and “same” and the like used in the embodiments of the present disclosure include the strictly “parallel”, “perpendicular”, “same” and the like, and the “approximately parallel”, “approximately perpendicular”, “approximately same” and the like with a certain error, which, considering the measurement and the error related to the measurement of a specific value (for example, the limitation of the measurement system), represents the acceptable deviation range for the 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 quantity of a component is not specifically indicated in the following of 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” means one or more, and “multiple” means at least two.

[0071] Generally, OLED display products can adopt a vacuum evaporation manufacturing process, but since the process needs to use a high-precision metal mask (FMM), the pixel density of the display product is limited, for example, only about 500, and thus the resolution of the OLED display product needs to be improved.

[0072] For example, the light-emitting functional layer of an OLED display product (such as a tandem device) includes multiple film layers stacked, such as a hole transport layer (HTL), a charge generation layer (CGL), and an electron transport layer (ETL), etc., which are used as common film layers. In some display panels, in order to improve the light-emitting efficiency, the light-emitting functional layer of a sub-pixel with different light-emitting colors can use different organic materials to improve the electron mobility or hole mobility. For example, the light-emitting functional layer of a red sub-pixel and a green sub-pixel uses phosphorescent materials, and the light-emitting functional layer of a blue sub-pixel uses fluorescent materials, which can cause the turn-on voltage of the red sub-pixel and the green sub-pixel to be different from the turn-on voltage of the blue sub-pixel. 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 displays, the light-emitting elements of different colors of sub-pixels between different sub-pixels cause lateral electron or hole transport, which can easily cause color crosstalk. For example, when the red sub-pixel and the blue sub-pixel are controlled to emit light, the green sub-pixel also emits light due to the lateral migration of charges, which can cause the light-emitting color of the monochromatic sub-pixel to be impure, and thus the color gamut of the display panel is low and the display effect is poor.

[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, comprising a substrate, a plurality of sub-pixels and a pixel defining portion, the plurality of sub-pixels are located on the substrate, the sub-pixel comprises a light emitting element, the light emitting element comprises a light emitting functional layer, and a first electrode and a second electrode located on both sides of the light emitting functional layer, the first electrode is closer to the substrate than the second electrode, the first electrodes of adjacent sub-pixels are arranged apart from each other, the plurality of sub-pixels comprise a first sub-pixel and a second sub-pixel adjacent to each other; the pixel defining portion is located between the light emitting functional layer and the substrate, the pixel defining portion comprises a plurality of openings, the openings are configured to expose at least part of the first electrode of the sub-pixel to define a 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 arranged 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 arranged apart from each other, and the display panel further comprises a plurality of auxiliary electrodes located on the substrate, and the second electrode of at least part of the sub-pixels is electrically connected through the auxiliary electrode.

[0075] In the display panel provided by the embodiment 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 arranged apart from each other, so that the risk of crosstalk between the first sub-pixel and the second sub-pixel can be effectively reduced; at the same time, the second electrode of the first sub-pixel and the second electrode of the second sub-pixel are arranged apart from each other, which is beneficial to simplify the manufacturing process of the first sub-pixel and the second sub-pixel, the second electrode of at least part of the sub-pixels is electrically connected through the auxiliary electrode, so that the signal continuity between the second electrodes of the plurality of sub-pixels can be ensured; 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 10 μm, so that the pixel density of the display panel is high, and the clarity of the display picture can be improved to have good display quality.

[0076] Hereinafter, the display panel and the display device provided by the embodiment of the present disclosure will be described in conjunction with the drawings.

[0077] FIG. 1 is a partial cross-sectional view of a display panel according to at least one embodiment of the present disclosure; FIG. 2 is a partial structural view of a display panel according to at least one embodiment of the present disclosure; and FIG. 3A is a plan view of the display panel shown in FIG. 1.

[0078] As shown in FIG. 1, the display panel 10 includes a substrate 100, and a plurality of sub-pixels 200 on the substrate 100. For example, the sub-pixel 200 includes a light-emitting element 300, the light-emitting element 300 includes a light-emitting functional layer 310, and a first electrode 410 and a second electrode 420 on both sides of the light-emitting functional layer 310, and the first electrode 410 is closer to the substrate 100 than the second electrode 420. For example, the first electrode 410, the light-emitting functional layer 310, and the second electrode 420 are sequentially stacked on the substrate 100. For example, each of the sub-pixels 200 in the display panel 10 includes the light-emitting element 300, and the light-emitting element 300 can be an organic light-emitting element, but is not limited thereto.

[0079] For example, as shown in FIG. 3A, the plurality of sub-pixels 200 can be arranged in a first direction X and a second direction Y, the first direction X and the second direction Y intersect, and both are parallel to the substrate. For example, the first direction X can be perpendicular to the second direction Y. For example, as shown in FIG. 1, the third direction Z represents a direction perpendicular to the substrate 100.

[0080] As shown in FIG. 2, in the third direction Z, the light-emitting functional layer is between the first electrode 410 and the second electrode 420, and the light-emitting functional layer 310 includes a plurality of film layers, such as a hole injection layer HIL, a second hole transport layer HTL-2, a second light-emitting layer U2, a second hole blocking layer HBL-2, a second electron transport layer ETL-2, a second charge 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 sequentially stacked in the direction along the third direction Z and from the first electrode 410 to the second electrode 420.

[0081] For example, as shown in FIG. 2, the first charge generation layer 351 and the second charge generation layer 352 have strong conductivity, which can make the light-emitting functional layer 310 have the advantages of long service life, low power consumption, and high brightness. For example, compared with a light-emitting functional layer without the first charge generation layer 351 and the second charge generation layer 352, the light-emitting functional layer 310 with the first charge generation layer 351 and the second charge generation layer 352 can effectively improve the light-emitting brightness of the light-emitting element 300. For example, the light-emitting element 300 shown in FIG. 2 can be a tandem light-emitting element.

[0082] For example, as shown in FIG. 2, 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, and the first charge generation layer 351 and the second charge generation layer 352 have a high charge mobility. For example, the first electrode 410 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 a low work function, for example, the cathode can be made of a metal material. For example, the anode can be formed of a transparent conductive material with a high work function, and embodiments of the present disclosure are not limited thereto.

[0083] As shown in FIG. 1, in some examples, the display panel 10 further includes a pixel defining part 550 located between the light emitting functional layer 310 and the substrate 100, the pixel defining part 550 includes a plurality of openings 510, and the openings 510 are configured to expose at least part of the first electrode 410 of the sub-pixel 200 to define a light emitting area of the sub-pixel 200. For example, one sub-pixel 200 can correspond to one opening 510. For example, when the light emitting functional layer 310 is formed in the opening 510 of the pixel defining part 550, the first electrode 410 and the second electrode 420 located on both sides of the light emitting functional layer 310 can drive the light emitting functional layer 310 in the opening 510 to emit light. For example, the light emitting area of the above-mentioned sub-pixel 200 can refer to the area of the sub-pixel 200 that effectively emits light, and the shape of the light emitting area refers to a two-dimensional shape, for example, the shape of the light emitting area can be the same as the shape of the opening 510 of the pixel defining part 550.

[0084] As shown in FIG. 1, at least part of the pixel defining part 550 is located between the first electrodes 410 of adjacent sub-pixels 200, so that the first electrodes 410 of adjacent sub-pixels 200 are arranged apart from each other. The plurality of sub-pixels 200 includes a first sub-pixel 210 and a 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 arranged apart from each other, and 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 embodiments of the present disclosure, patterning the light emitting functional layer 310 of the sub-pixel 200 can adopt a photolithography process. Thus, the risk of horizontal electron and hole transport between the first sub-pixel 210 and the second sub-pixel 220 can be effectively reduced, thereby reducing the crosstalk phenomenon. For example, the light emitting color of the first sub-pixel 210 can be different from the light emitting color of the second sub-pixel 220, but is not limited thereto. For example, the light emitting color of the first sub-pixel 210 can also be the same as the light emitting color of the second sub-pixel 220, and embodiments of the present disclosure are not limited thereto.

[0085] As shown in FIG. 1, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are arranged apart from each other, thereby reducing the manufacturing difficulty of the first sub-pixel 210 and the second sub-pixel 220, for example, the second electrode 420 can be formed by using a photolithography process (see the related description in the following embodiments), and the patterning process is performed without using a fine mask, thereby being applicable to mass production.

[0086] As shown in FIG. 1, the display panel 10 further includes an auxiliary electrode 600 on the substrate 100, and the second electrode 420 of at least part of the sub-pixels 200 is electrically connected through the auxiliary electrode 600. For example, the second electrode 420 of the first sub-pixel 210 can be electrically connected with the second electrode 420 of the second sub-pixel 220 through the auxiliary electrode 600. For example, in all the sub-pixels 200 in the display panel 10, two adjacent sub-pixels 200 are electrically connected through the auxiliary electrode 600.

[0087] For example, as shown in FIG. 1, 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 layer stack of a molybdenum metal layer, a copper metal layer, a titanium metal layer, an aluminum metal layer, and a titanium metal layer, or a layer stack of an indium tin oxide layer, a silver metal layer, and an indium tin oxide layer, thereby making the resistance low to facilitate increasing the transmission current. Thus, the arrangement of the auxiliary electrode 600 can make the second electrode 420 of the plurality of sub-pixels 200 connected thereto have continuity, thereby facilitating synchronous application of the control signal.

[0088] For example, as shown in FIG. 3A, 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 arranged 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 arranged 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 arranged apart from the second electrode 420 of the first sub-pixel 210, and the second electrode 420 of the third sub-pixel 230 is arranged apart from the second electrode 420 of the second sub-pixel 220. For example, the light-emitting color of the third sub-pixel 230 is different from the light-emitting color of the first sub-pixel 210 and the light-emitting color of the second sub-pixel 220, but is not limited thereto. For example, the light-emitting color of the third sub-pixel 230 can be the same as the light-emitting color of at least one of the first sub-pixel 210 and the second sub-pixel 220, and the embodiments of the present disclosure do not limit this.

[0089] For example, as shown in FIG. 3A, the plurality of first sub-pixels 210 and the plurality of second sub-pixels 220 are arranged alternately in the first direction X, and the plurality of second sub-pixels 220 and the plurality of third sub-pixels 230 are arranged alternately in the second direction Y. For example, FIG. 3A schematically shows the light-emitting regions of the first sub-pixels 210, the second sub-pixels 220, and the third sub-pixels 230. In the first direction X, the distance L between the light-emitting region of the first sub-pixel 210 and the light-emitting region of the second sub-pixel 220 is not greater than 10 μm, for example, can be 5 μm, 6 μm, 7 μm, 8 μm, or 9 μm.

[0090] In this way, the first sub-pixels and the second sub-pixels can be arranged closely in the first direction X, so that the pixel density in the display panel is high, and the definition of the display image can be improved, so that the display panel has 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-pixels and the second sub-pixels, and facilitate simplification of the manufacturing process of the first sub-pixels and the second sub-pixels. The second electrodes of at least part of the sub-pixels are electrically connected by using the auxiliary electrodes, so that the signal continuity between the second electrodes of the plurality of sub-pixels can be ensured, and meanwhile, the pixel density of the display panel is high, the definition of the display image can be improved, and the display panel has good display quality.

[0092] FIG. 3B is a schematic view of a partial structure of the display panel in FIG. 3A; and FIG. 3C is a schematic view of a partial structure of a pixel unit in the display panel in FIG. 3A.

[0093] For example, as shown in FIG. 1 and FIG. 3B, the first electrodes 410 of adjacent sub-pixels 200 have a pixel boundary 550 therebetween, and the auxiliary electrode 600 has a projection on the substrate 100 that at least partially overlaps with a projection of the pixel boundary 550 on the substrate 100. For example, the auxiliary electrode 600 in FIG. 1 is located on a side of the pixel boundary 550 away from the substrate 100, but the embodiments of the present disclosure are not limited thereto. In some embodiments, the auxiliary electrode 600 can also be located on a side of the pixel boundary 550 close to the substrate 100.

[0094] For example, as shown in FIG. 3A, the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 constitute a pixel unit 123, in which the second sub-pixel 220 and the third sub-pixel 230 are located on the same side of the first sub-pixel 210. For example, the orthographic projections of the light-emitting regions of the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 on the substrate are all rectangles, the orthographic projection area of the light-emitting region of the third sub-pixel 230 on the substrate is smaller than that of the second sub-pixel 220, and the orthographic projection area of the light-emitting region of the second sub-pixel 220 on the substrate is smaller than that of the first sub-pixel 210.

[0095] As shown in FIG. 3A, the display panel 10 includes a plurality of pixel units 123 arranged in an array on the substrate to form a plurality of pixel unit columns 1231 arranged in the first direction X and a plurality of pixel unit rows 1232 arranged in the second direction Y. The plurality of first sub-pixels 210 in the pixel unit column 1231 are arranged in sequence with intervals in the second direction Y, and the plurality of second sub-pixels 220 and the plurality of third sub-pixels 230 in the pixel unit column 1231 are arranged alternately in the second direction Y.

[0096] For example, as shown in FIG. 1, the auxiliary electrode 600 is located on the side of the pixel defining part 550 away from the substrate 100, and the second electrode 420 of at least part of the sub-pixels 200 is in contact with the auxiliary electrode 600 for electrical connection. As shown in FIG. 1, 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 the two sides of the auxiliary electrode 600, and the second electrode 420 of the first sub-pixel 210 is in contact with the side wall of the auxiliary electrode 600 for electrical connection, and the second electrode 420 of the second sub-pixel 220 is in contact with the other side wall of the auxiliary electrode 600 for electrical connection, so that the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected. Similarly, the second electrode 420 of the second sub-pixel 220 and the second electrode 420 of the third sub-pixel 230 are respectively in contact with the side walls of the auxiliary electrode 600 for electrical connection. This connection mode is conducive to simplifying the connection structure between the second electrode 420 of the sub-pixel 200 and the auxiliary electrode 600, and is conducive to making the second electrode 420 of the sub-pixel 200 and the auxiliary electrode 600 have a higher electrical signal transmission efficiency.

[0097] For example, as shown in FIG. 1, the display panel 10 further includes an insulating pattern 800 located on the side of the pixel defining part 550 away from the substrate 100, and at least part of the insulating pattern 800 is located between the light-emitting functional layer 310 and the auxiliary electrode 600 of any one of the at least part of the sub-pixels 200, so that the auxiliary electrode 600 and the light-emitting functional layer 310 of the sub-pixel 200 are insulated from each other. For example, at least part of the insulating pattern 800 is wrapped on the sidewall of the auxiliary electrode 600, so that the light-emitting functional layers 310 of adjacent sub-pixels 200 (for example, the first sub-pixel 210 and the second sub-pixel 220, or the second sub-pixel 220 and the third sub-pixel 230) do not contact each other, so as to reduce the risk of electron migration between the light-emitting functional layers 310 of adjacent sub-pixels 200 causing crosstalk. For example, the insulating pattern 800 can be wrapped on the sidewall of the auxiliary electrode 600 along the circumference thereof, so as to have a good insulating effect.

[0098] For example, as shown in FIG. 1, the second electrode 420 of the first sub-pixel 210 is electrically connected to the second electrode 420 of the second sub-pixel 220 through the auxiliary electrode 600, and the second electrode 420 of the third sub-pixel 230 is electrically connected to the second electrode 420 of the second sub-pixel 220 through the auxiliary electrode 600. The distance M1 between the light-emitting functional layer 310 and the auxiliary electrode 600 of at least one of the first sub-pixel 210, the second sub-pixel 220, and the third sub-pixel 230 is 2 μm to 4 μm, for example, can be 2 μm, 3 μm, or 4 μm. In this way, the light-emitting functional layers 310 of adjacent sub-pixels 200 can be well separated to reduce the risk of crosstalk.

[0099] For example, as shown in FIG. 1, the insulating pattern 800 can be made of urea-formaldehyde resin, aniline-formaldehyde resin, melamine-formaldehyde resin, glycerol resin, polyvinyl chloride, polyethylene, polytetrafluoroethylene, chlorobutyl rubber, polyvinyl acetal, polyimide, polyamide-imide, polyimide, polymaleimide, or polyphenylene ether, but is not limited thereto. For example, the thickness of the insulating pattern 800 can be 2 μm to 4 μm, for example, can be 2 μm, 3 μm, or 4 μm. For example, the insulating pattern 800 has an opening size M3 in the first direction X, and M3 is less than 18 μm, for example, can be 5 μm, 9 μm, 13 μm, 15 μm, or 18 μm.

[0100] For example, as shown in FIG. 1, the surface 601 of the auxiliary electrode 600 close to the substrate 100 is in contact with the pixel defining part 550. For example, in the third direction Z, the surfaces of the auxiliary electrode 600 and the pixel defining part 550 facing each other are adhered to each other. For example, the auxiliary electrode 600 is made before the formation of the insulating pattern 800, so that the auxiliary electrode 600 can be stably arranged on the pixel defining part 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 FIG. 1, the surface 602 of the auxiliary electrode 600 away from the pixel defining part 550 is farther away from the substrate 100 than the surface 401 of the second electrode 420 away from the pixel defining part 550. That is, in the second direction Y, the surface 602 of the auxiliary electrode 600 away from the pixel defining part 550 is not covered by the second electrode 420, so that the second electrode 420 of the adjacent sub-pixel 200 can be in sufficient contact with the sidewall of the auxiliary electrode 600 to form a stable electrical connection.

[0102] For example, as shown in FIG. 1, the auxiliary electrode 600 can serve as a support pad of 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 arranged on the pixel defining part 550 between the adjacent sub-pixels 200, but is not limited thereto. For example, the height H of the auxiliary electrode 600 in the second direction Y is 1 μm to 2 μm, for example, can be 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 view of a partial structure of the display panel in FIG. 1.

[0104] For example, as shown in FIG. 1 and FIG. 4, 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 direction of the geometric center line 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 direction of the geometric center line of the second sub-pixel 220 and the third sub-pixel 230.

[0105] FIG. 5A is a partial cross-sectional schematic view of another display panel provided by at least one embodiment of the present disclosure; and FIG. 5B is an enlarged schematic view of a partial structure of the display panel in FIG. 5A.

[0106] For example, as shown in FIG. 5A, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected through an auxiliary electrode 600, which has a trapezoidal cross section along a plane perpendicular to the substrate and parallel to the central line between the first sub-pixel 210 and the second sub-pixel 220. As shown in FIG. 5A and FIG. 5B, in the first direction X, the upper base of the above-mentioned trapezoid has a smaller size than the lower base, and the upper base is farther away from the pixel boundary 550 than the lower base, so that at least part of the insulating pattern 800 can be filled between the light-emitting functional layer 310 and the auxiliary electrode 600, so that the light-emitting functional layer 310 and the auxiliary electrode 600 are insulated from each other.

[0107] FIG. 6 is a partial cross-sectional schematic view of another display panel according to at least one embodiment of the present disclosure.

[0108] For example, as shown in FIG. 6, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected through an auxiliary electrode 600, which has a trapezoidal cross section along a plane perpendicular to the substrate and parallel to the central line between the first sub-pixel 210 and the second sub-pixel 220, and the upper base of the trapezoid is closer to the pixel boundary 550 than the lower base. In this way, the light-emitting functional layer 310 is less likely to cross the edge of the surface of the auxiliary electrode 600 away from the substrate, so as to have a certain blocking effect thereon, so as to reduce the risk of crosstalk.

[0109] In some embodiments, the auxiliary electrode can also have an elliptical cross section along a plane perpendicular to the substrate and parallel to the central line between adjacent sub-pixels, or other shapes, which are not limited in the embodiments of the present disclosure.

[0110] FIG. 7 is a partial cross-sectional schematic view of another display panel according to at least one embodiment of the present disclosure.

[0111] For example, as shown in FIG. 7, the display panel 20 is different from the display panel 10 shown in FIG. 1 in that the position and connection mode of the auxiliary electrode 600 are different, and the remaining structures can be referred to the related descriptions of the embodiments with respect to FIG. 1, which are not repeated here.

[0112] For example, as shown in FIG. 7, the display panel 20 includes the first sub-pixel 210 and the second sub-pixel 220 adjacent to each other, and the auxiliary electrode 600 is located between the first sub-pixel 210 and the second sub-pixel 220 and is covered by a part of the pixel defining part 550. The second electrode 420 of the first sub-pixel 210 is electrically connected to the auxiliary electrode 600 through the via N10 in the pixel defining part 550, and the second electrode 420 of the second sub-pixel 220 is also electrically connected to the auxiliary electrode 600 through the via N10 in the pixel defining part 550. For example, a part of the second electrode 420 of the first sub-pixel 210 extends into the via N10 and extends along the sidewall of the via N10 until it contacts the auxiliary electrode 600. A part of the second electrode 420 of the second sub-pixel 220 extends into the via N10 and extends along the sidewall of the via N10 until it contacts the auxiliary electrode 600, so that the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected.

[0113] FIG. 8 is a partial cross-sectional schematic view of another display panel according to at least one embodiment of the present disclosure.

[0114] For example, as shown in FIG. 8, the display panel 30 is different from the display panel 10 shown in FIG. 1 in the position and connection mode of the auxiliary electrode 600, and the remaining structures can refer to the related descriptions of the above embodiments with respect to FIG. 1, which will not be repeated here.

[0115] For example, as shown in FIG. 8, the display panel 30 includes the first sub-pixel 210 and the second sub-pixel 220 adjacent to each other, and the auxiliary electrode 600 is located between the first sub-pixel 210 and the second sub-pixel 220. The display panel 10 further includes a planar layer 700 located on the side of the pixel defining part 550 close to the substrate 100, and the auxiliary electrode 600 is covered by a part of the planar layer 700. For example, the second electrode 420 of the first sub-pixel 210 and the second electrode 420 of the second sub-pixel 220 are electrically connected to the auxiliary electrode 600 through the via N20 in the planar layer 700. For example, a part of the via N20 is located in the planar layer 700 and penetrates through the pixel defining part 550 and the light-emitting functional layer 310, so that the second electrode 420 of the first sub-pixel 210 extends into the via N20 to be electrically connected to the auxiliary electrode 600, and the second electrode 420 of the second sub-pixel 220 extends into the via N20 to be electrically connected to the auxiliary electrode 600.

[0116] For example, in some embodiments, the display panel can further include other film layers between the planar layer and the substrate, and the auxiliary electrode can also be covered by the other film layers. The embodiments of the present disclosure do not specifically limit the position of the auxiliary electrode.

[0117] FIG. 9 is another plan view of the display panel shown in FIG. 1; and FIG. 10 is an enlarged view of the auxiliary electrode in FIG. 9.

[0118] For example, as shown in FIG. 9, the display panel 10 includes a plurality of first sub-pixels 210, a plurality of second sub-pixels 220, and a plurality of third sub-pixels 230, and the display panel 10 has the auxiliary electrodes 600 arranged at intervals. The second electrodes 420 of at least some of the sub-pixels 200 are electrically connected through the auxiliary electrode portions 610. For example, in the first direction X, the second sub-pixels 220 on both sides of the first sub-pixel 210 are electrically connected to the first sub-pixel 210 through the auxiliary electrodes 600, and the third sub-pixels 230 on both sides of the first sub-pixel 210 are electrically connected to the first sub-pixel 210 through the auxiliary electrodes 600. For example, in some embodiments, in the second direction Y, the first sub-pixels 210 are electrically connected through the auxiliary electrodes 600, and the second sub-pixels 220 are electrically connected to the third sub-pixels 230 through the auxiliary electrodes 600. In this way, the second electrodes 420 of the plurality of sub-pixels 200 can be electrically connected, so as to facilitate synchronous signal application.

[0119] For example, as shown in FIG. 10, the auxiliary electrode 600 can have a rectangular shape in the orthographic projection on the substrate. For example, the length of the rectangle can be 17 μm to 20 μm. For example, the rectangle has a first length D1 extending along the first direction X and a second length D2 extending along the second direction Y. The first length D1 can be substantially equal to the second length D2, or the first length D1 can be greater than the second length D2. For example, the first length D1 and the second length D2 can each be 17 μm, 18 μm, 19 μm, or 20 μm, so that the second electrodes 420 of the adjacent sub-pixels 200 can be well electrically connected to the auxiliary electrode 600, so as to ensure the efficiency of the electrical signal transmission.

[0120] FIG. 11 is a plan view of another display panel according to at least one embodiment of the present disclosure; and FIG. 12 is a partial cross-sectional view of the display panel in FIG. 11.

[0121] For example, as shown in FIG. 11, the display panel 40 differs from the display panel 10 shown in FIG. 1 in that the structure and connection mode of the auxiliary electrode 600 are different. The remaining structures can be understood with reference to the related descriptions of the embodiments with respect to FIG. 1, which will not be repeated here.

[0122] For example, as shown in FIG. 11, the plurality of auxiliary electrodes 600 in the display panel 40 includes 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 the first direction X, the second auxiliary electrode portions 620 and the third auxiliary electrode portions 630 both extend along the second direction Y, the plurality of first auxiliary electrode portions 610 are sequentially and spaced arranged 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 by a first conductive element 6201, and the plurality of third auxiliary electrode portions 630 can be electrically connected by 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 FIG. 11, the first auxiliary electrode portions 610, the second auxiliary electrode portions 620, and the third auxiliary electrode portions 630 can be insulated from each other and independently applied with signals, respectively. For example, the second electrodes 420 of a portion of the sub-pixels 200 in the display panel 40 are electrically connected by the first auxiliary electrode portions 610, the second electrodes 420 of another portion of the sub-pixels 200 are electrically connected by the second auxiliary electrode portions 620, and the second electrodes 420 of still another portion of the sub-pixels 200 are electrically connected by the third auxiliary electrode portions 630. For example, the number of the sub-pixels 200 electrically connected with the first auxiliary electrode portions 610, the second auxiliary electrode portions 620, and the third auxiliary electrode portions 630, respectively, can be the same or different, which is not limited in the embodiments of the present disclosure. In this way, different signals can be applied to the sub-pixels 200 electrically connected by the first auxiliary electrode portions 610, the second auxiliary electrode portions 620, and the third auxiliary electrode portions 630, respectively, to meet different requirements for the turn-on voltage.

[0124] For example, as shown in FIG. 11, the plurality of sub-pixels 200 in the display panel 40 includes first color sub-pixels 2111, second color sub-pixels 2211, and third color sub-pixels 2311 that emit light of different colors, the light-emitting functional layers of the first color sub-pixels 2111, the light-emitting functional layers of the second color sub-pixels 2211, and the light-emitting functional layers of the third color sub-pixels 2311 are arranged in a spaced manner, and the second electrodes 420 of the first color sub-pixels 2111, the second electrodes 420 of the second color sub-pixels 2211, and the second electrodes 420 of the third color sub-pixels 2311 are arranged in a spaced manner. For example, the first color sub-pixels 2111 are configured to emit blue light, the second color sub-pixels 2211 are configured to emit green light, and the third color sub-pixels 2311 are configured to emit red light, but are 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 and the first sub-pixel, the second sub-pixel and the third sub-pixel in the above embodiments are from different angles to describe different sub-pixels in the plurality of sub-pixels, and there is no conflict between them. 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 FIG. 11, the second electrode 420 of at least part of the first color sub-pixel 2111 is electrically connected through the first auxiliary electrode part 610, the second electrode 420 of at least part of the second color sub-pixel 2211 is electrically connected through the second auxiliary electrode part 620, and the second electrode 420 of at least part of the third color sub-pixel 2311 is electrically connected through the third auxiliary electrode part 630. In the second direction Y, one first auxiliary electrode part 610 is arranged between adjacent first color sub-pixels 2111, and the two adjacent first color sub-pixels 2111 are electrically connected through the first auxiliary electrode part 610 located therebetween. For example, in the second direction Y, a plurality of second color sub-pixels 2211 located in the same column are connected to the same second auxiliary electrode part 620, and a plurality of third color sub-pixels 230 located in the same column are connected to the same third auxiliary electrode part 630. For example, the plurality of first color sub-pixels 2111 in the display panel 40 can receive the same electrical signal through the first auxiliary electrode part 610, the plurality of second color sub-pixels 2211 can receive the same electrical signal through the second auxiliary electrode part 620, and the plurality of third color sub-pixels 2311 can receive the same electrical signal through the third auxiliary electrode part 630. For example, the signals applied to the first auxiliary electrode part 610, the second auxiliary electrode part 620 and the third auxiliary electrode part 630 are different, so that the second electrodes 420 of the sub-pixels 200 of different colors in the display panel 40 can be controlled respectively, thereby meeting the different requirements of the sub-pixels 200 of different colors for the turn-on voltage.

[0127] For example, as shown in FIG. 12, the display panel 40 includes a planar layer 700 located on the side of the pixel defining part 550 close to the substrate 100. For example, the first auxiliary electrode part 610 is closer to the substrate 100 than the second auxiliary electrode part 620, and the first auxiliary electrode part 610 is located between the planar layer 700 and the substrate 100 and in contact with the planar layer 700. The second auxiliary electrode part 620 and the third auxiliary electrode part 630 are both located between the planar layer 700 and the pixel defining part 550. For example, the second electrode 420 of the first color sub-pixel 2111 is electrically connected to the auxiliary electrode part 610 through 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 part 620 through a second connection hole N2 in the pixel defining part 550, and the second electrode 420 of the third color sub-pixel 2311 is electrically connected to the third auxiliary electrode part 630 through a third connection hole N3 in the pixel defining part 550.

[0128] For example, as shown in FIG. 11, since the plurality of second auxiliary electrode parts 620 and the plurality of third auxiliary electrode parts 630 are arranged alternately in the first direction X, when the second auxiliary electrode part 620 and the third auxiliary electrode part 630 are both located on the planar layer, it is beneficial to simplify the manufacturing process of the second auxiliary electrode part 620 and the third auxiliary electrode part 630 and to meet the reasonable arrangement of layout space. For example, since the first auxiliary electrode part 610 extends along the first direction X, by locating the first auxiliary electrode part 610 on the side of the second auxiliary electrode part 620 close to the substrate 100, the risk of the second auxiliary electrode part 620 and the third auxiliary electrode part 630 being electrically connected to each other through the first auxiliary electrode part 610 can be reduced.

[0129] In some embodiments, when the first auxiliary electrode part, the second auxiliary electrode part, and the third auxiliary electrode part are independently applied with signals respectively, the first auxiliary electrode part, the second auxiliary electrode part, and the third auxiliary electrode part can also be located on different layers respectively. For example, the distance between the first auxiliary electrode part, the second auxiliary electrode part, and the third auxiliary electrode part and the substrate increases in turn, for example, the first auxiliary electrode part and the second auxiliary electrode part can have a first insulating layer therebetween, and the second auxiliary electrode part and the third auxiliary electrode part can have a second insulating layer therebetween, so as to insulate the first auxiliary electrode part, the second auxiliary electrode part, and the third auxiliary electrode part from each other. The embodiments of the present disclosure do not make specific limitations on the positions of the first auxiliary electrode part, the second auxiliary electrode part, and the third auxiliary electrode part.

[0130] FIG. 13 is a plan view of another display panel according to at least one embodiment of the present disclosure.

[0131] For example, as shown in FIG. 13, the display panel 50 is different from the display panel 40 shown in FIG. 11 in that the structure and connection mode of the auxiliary electrodes 600 are different, and the rest of the structure can refer to the related description of the above embodiment with respect to FIG. 11, which is not repeated here.

[0132] For example, as shown in FIG. 13, the plurality of auxiliary electrodes 600 in the display panel 50 can 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 plurality of first sub-auxiliary electrodes 670 are all connected to the second sub-auxiliary electrode 680.

[0133] For example, as shown in FIG. 13, the display panel 50 includes a plurality of pixel unit columns 1231 and a plurality of pixel unit rows 1232, and the second electrodes 420 of the sub-pixels 200 in the pixel unit column 1231 are connected to the same first sub-auxiliary electrode 670. For example, one first sub-auxiliary electrode 670 is arranged 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 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 on the other side of the first sub-auxiliary electrode 670 are all connected to the first sub-auxiliary electrode 670. For example, the number of the first sub-auxiliary electrodes 670 in the display panel 50 is equal to the number of the pixel unit columns 1331. For example, the display panel 50 can 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 through the second sub-auxiliary electrode 680 and constitute an integrated structure, so that the same signal can be applied.

[0134] FIG. 14 is a plan view of another display panel according to at least one embodiment of the present disclosure.

[0135] For example, as shown in FIG. 14, the display panel 60 is different from the display panel 50 shown in FIG. 13 in that the number and connection mode of the second sub-auxiliary electrodes 680 are different, and the rest of the structure can refer to the related description of the above embodiment with respect to FIG. 13, which is not repeated here. For example, as shown in FIG. 14, the display panel 60 can include a plurality of first sub-auxiliary electrodes 670 and a plurality of second sub-auxiliary electrodes 680, and the connection mode of the plurality of second sub-pixels 220 and the plurality of third sub-pixels 230 to the first sub-auxiliary electrodes 670 can refer to the description with respect to FIG. 13, which is not repeated here.

[0136] For example, as shown in FIG. 14, 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 respectively electrically connected to the two second sub auxiliary electrodes 680. For example, the plurality of first sub auxiliary electrodes 670 and the plurality of second auxiliary electrode pieces 680 are connected as an integrated structure and are in a "net shape". For example, the first sub auxiliary electrodes 670 and the second auxiliary electrode pieces 680 can be located on the same layer or different layers, but are not limited thereto. For example, one second auxiliary electrode piece 680 can be electrically connected to a plurality of first sub auxiliary electrodes 670. For example, the number of first sub auxiliary electrodes 670 connected by at least two second auxiliary electrode pieces 680 can be different, and the embodiments of the present disclosure do not limit the number of first sub auxiliary electrodes 670 connected by the second auxiliary electrode pieces 680.

[0137] For example, as shown in FIG. 2, the first charge generation layer 351 of the sub-pixel 200 is located between the first light-emitting layer U1 and the second light-emitting layer U2, and the first light-emitting layer U1 is farther away from the substrate 100 than the second light-emitting layer U2. As shown in FIG. 3C, the orthographic projection of the light-emitting area 2101 of the first sub-pixel 210 on the substrate falls within the orthographic projection of the first charge generation layer 2102 of the first sub-pixel 210 on the substrate, the orthographic projection of the light-emitting area 2201 of the second sub-pixel 220 on the substrate falls within the orthographic projection of the first charge generation layer 2202 of the second sub-pixel 220 on the substrate, and the orthographic projection of the light-emitting area 2301 of the third sub-pixel 230 on the substrate falls within the orthographic projection of the first charge generation layer 2302 of the third sub-pixel 230 on the substrate.

[0138] For example, as shown in FIG. 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 arranged 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 18.0 μm to 21.5 μm, for example, which can be 21.5 μm, 21.0 μm, 20.5 μm, 20.0 μm, 19.5 μm or 19.0 μm. In this way, the pixel density of the display panel can be improved to improve the clarity of the display picture, thereby facilitating 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 can also be 18.0-21.5 μm, for example, can be 21.5 μm, 21.0 μm, 20.5 μm, 20.0 μm, 19.5 μm or 19.0 μm, so as to further improve the pixel density of the display panel.

[0140] For example, as shown in FIG. 3C, the orthographic projection of the light-emitting region 2101 of the first sub-pixel 210 on the substrate substrate is a first rectangle F1, the orthographic projection of the first charge generation layer 2102 of the first sub-pixel 210 on the substrate substrate is a second rectangle F2, and the first rectangle F1 falls in the second rectangle F2, so that the area of the orthographic projection of the light-emitting region 2101 of the first sub-pixel 210 on the substrate substrate is less than the area of the orthographic projection of the first charge generation layer 2102 of the first sub-pixel 210 on the substrate substrate.

[0141] For example, as shown in FIG. 3C, the width v of the first rectangle F1 is not less than 14 μm, for example, can be 15 μm, 16 μm, 17 μm or 18 μm, and the length h of the first rectangle F1 is not less than 50 μm, for example, can be 53 μm, 55 μm, 58 μm or 60 μm. For example, the width a of the second rectangle F2 can be 14.5-17.0 μm, such as 14.6 μm, 15.1 μm, 15.7 μm or 16.4 μm, and for example, the length b of the second rectangle F2 can be 52-60 μm, such as 52.0 μm, 54.0 μm, 56.0 μm or 58.5 μm. In this way, the light-emitting region of the first sub-pixel 210 can be expanded as much as possible to make the first sub-pixel 210 have a larger pixel aperture ratio.

[0142] For example, referring to FIG. 11, the first color sub-pixel 2111 has a first pixel aperture ratio, which can be the percentage of the orthographic projection area of the light-emitting region of the first color sub-pixel 2111 on the substrate substrate to the orthographic projection area of the first charge generation layer on the substrate substrate. For example, the second color sub-pixel 2211 has a second pixel aperture ratio, which can be the percentage of the orthographic projection area of the light-emitting region of the second color sub-pixel 2211 on the substrate substrate to the orthographic projection area of the first charge generation layer on the substrate substrate. The third color sub-pixel 2311 has a third pixel aperture ratio, which can be the percentage of the orthographic projection area of the light-emitting region of the third color sub-pixel 2311 on the substrate substrate to the orthographic projection area of the first charge generation layer on the substrate substrate.

[0143] For example, the light-emitting functional layer of some display panels is made by using a high-precision metal mask (FMM), the distance between the light-emitting areas of adjacent sub-pixels is generally not less than 19 μm, the pixel aperture ratio is not more than 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 scheme, the first pixel aperture ratio, the second pixel aperture ratio, and the third pixel aperture ratio are set 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 prolonging the service time of the display panel.

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

[0145] In this way, in the case where the light-emitting area of the first color sub-pixel is greater than the light-emitting area of the second color sub-pixel, and the light-emitting area of the second color sub-pixel is greater than the light-emitting area of the third color sub-pixel, the brightness life of the sub-pixels with different light-emitting areas can be balanced, so that the overall brightness life of the display panel is more uniform.

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

[0147] For example, as shown in FIG. 3D, when the light-emitting functional layer in the display panel is made by using a photolithography process, the corresponding distribution curve of the brightness decay ratio is M10, and when the light-emitting functional layer in the display panel is made by using a high-precision metal mask (FMM), the corresponding distribution curve of the brightness decay ratio is M20. As shown in FIG. 3D, when the light-emitting functional layer is made by using a photolithography process, the time corresponding to a brightness decay ratio of 95% of the display panel is about 9000 hours, and when the light-emitting functional layer is made by using a high-precision metal mask (FMM), the time corresponding to a brightness decay ratio of 95% of the display panel is about 3000 hours. Therefore, making the light-emitting functional layer by using a photolithography process is beneficial to improving the life of the display panel.

[0148] For example, as shown in FIG. 2, 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 doping material, and the mass percentage of the first doping 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 triarylamine compound, and the first doping material includes a lithium quinoline complex, but is not limited thereto. For example, when the mass percentage of the first doping material in the first charge generation layer 351 is increased, the luminance life of the display panel can be improved.

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

[0150] For example, as shown in FIG. 1 and FIG. 2, the mass percentage of the first doping material in the first charge generation layer 351 of the sub-pixel 200 emitting different colors of light 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 doping material in the first charge generation layer 351 of the first sub-pixel 210 has a first mass percentage, the first doping material in the first charge generation layer 351 of the second sub-pixel 220 has a second mass percentage, the first doping material in the first charge generation layer 351 of the third sub-pixel 230 has a third mass percentage, and the first mass percentage is greater than the third mass percentage, and the third mass percentage is greater than the second mass percentage.

[0151] For example, as shown in FIG. 1 and FIG. 2, since the proportion of green light, red light, and blue light in white light decreases in turn, by making the first mass percentage, the third mass percentage, and the second mass percentage decrease in turn, the luminance of the first sub-pixel 210 can be greatly improved, the luminance improvement of the third sub-pixel 230 is less than that of the first sub-pixel 210, and the luminance improvement of the second sub-pixel 220 is less than that of the third sub-pixel 230, thereby making the luminance life of the display panel 10 more uniform.

[0152] For example, as shown in FIG. 2, 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, and 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, can be 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 light-emitting efficiency of the sub-pixel is improved.

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

[0154] In some embodiments, as shown in FIGS. 1 and 2, the light-emitting layer (such as the first light-emitting layer U1 and the second light-emitting layer U2) of the first sub-pixel 210 includes a fluorescent material, and the light-emitting layer (such as the first light-emitting layer U1 and the second light-emitting layer U2) of the second sub-pixel 220 and the third sub-pixel 230 each includes a phosphorescent material, thereby causing the turn-on voltage of the first sub-pixel 210, the second sub-pixel 220 and the third sub-pixel 230 to have a difference, and causing the light-emitting efficiency of the first sub-pixel 210 to be lower than the light-emitting efficiency of the second sub-pixel 220 and the third sub-pixel 230.

[0155] For example, as shown in FIG. 1, when the first sub-pixel 210 is configured to emit blue light, the second sub-pixel 220 is configured to emit green light, and the third sub-pixel 230 is configured to emit red light, the second dopant material in the second charge generation layer 352 of the first sub-pixel 210 has a fourth mass percentage, the second dopant material in the second charge generation layer 352 of the second sub-pixel 220 has a fifth mass percentage, the second dopant material in the second charge generation layer 352 of the third sub-pixel 230 has a sixth mass percentage, and the fifth mass percentage and the sixth mass percentage are each less than the fourth mass percentage. For example, the fifth mass percentage and the sixth mass percentage can be substantially the same.

[0156] In this way, the mass percentage of the second dopant material in the second charge generation layer of the first sub-pixel can be greatly increased, so that the light-emitting efficiency of the first sub-pixel is effectively enhanced.

[0157] For example, as shown in FIG. 2, the first hole transport layer HTL-1 is located between the first light emitting layer U1 and the first charge generation layer 351, the first hole blocking layer HBL-1, the first electron transport layer ETL-1, and the electron injection layer Yb are located between the first light emitting layer U1 and the second electrode 420, the first electron transport layer ETL-1 is located between the first hole blocking layer HBL-1 and the electron injection layer Yb, and the first hole blocking layer HBL-1 is closer to the first electrode 410 than the first electron transport layer ETL-1. The hole injection layer HIL and the second hole transport layer HTL-2 are located on the side of the second light emitting layer U2 closer to the first electrode 410, and the hole injection layer HIL is closer to the first electrode 410 than the second hole transport layer HTL-2. The second hole blocking layer HBL-2 and the second electron transport layer ETL-2 are located between the second light emitting layer U2 and the second charge generation layer 352, and the second hole blocking layer HBL-2 is closer to the second light emitting layer U2 than the second electron transport layer ETL-2. The light extraction layer CPL and the buffer layer LiF are located on the 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 FIG. 2, the thickness of the hole injection layer HIL of the light emitting functional layer 310 can be 100-200 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 300-700 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 500-700 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 100-300 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 50-150 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 300-400 angstroms, such as 300 angstroms, 380 angstroms, or 400 angstroms. For example, the thickness of the second electrode 420 can be 100-300 angstroms, such as 100 angstroms, 150 angstroms, 250 angstroms, or 300 angstroms. For example, the thickness of the electron injection layer Yb can be 10-30 angstroms, such as 10 angstroms, 20 angstroms, or 30 angstroms. For example, the thickness of the light extraction layer CPL can be 700-1200 angstroms, such as 800 angstroms, 950 angstroms, 1000 angstroms, or 1200 angstroms. For example, the thickness of the buffer layer LiF can be 600-900 angstroms, such as 600 angstroms, 720 angstroms, 800 angstroms, or 900 angstroms.

[0159] For example, as shown in FIG. 2, the first light-emitting layer U1 of the sub-pixel includes a first sub-light-emitting layer U11 and a first adjustment layer U12, and the first sub-light-emitting layer U11 is farther away from the first electrode 410 than the first adjustment layer U12. The second light-emitting layer U2 of the sub-pixel 200 includes a second sub-light-emitting layer U21 and a second adjustment layer U22, and the second sub-light-emitting layer U21 is farther away from the first electrode 410 than the second adjustment layer U22.

[0160] For example, as shown in FIG. 11 and FIG. 2, the first color sub-pixel 2111, the second color sub-pixel 2211 and the third color sub-pixel 2311 emit light of different colors, and the thicknesses 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 100-200 angstroms, such as 100 angstroms, 150 angstroms or 180 angstroms. The thicknesses 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 100-300 angstroms, such as 120 angstroms, 150 angstroms, 200 angstroms or 300 angstroms. For example, the thicknesses of the first adjustment layer U12 and the second adjustment layer U22 of the second color sub-pixel 2211 are both 300-500 angstroms, such as 300 angstroms, 400 angstroms, 450 angstroms or 500 angstroms. For example, the thicknesses 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 300-500 angstroms, such as 300 angstroms, 390 angstroms, 450 angstroms or 500 angstroms, and the thicknesses of the first adjustment layer U12 and the second adjustment layer U22 of the third color sub-pixel 2311 are both 500-700 angstroms, such as 500 angstroms, 600 angstroms, 650 angstroms or 700 angstroms.

[0161] By setting the thicknesses of the above-mentioned various film layers of the sub-pixel within a suitable range, the overall thickness of the display panel is appropriate while the light-emitting characteristics of the sub-pixel are met, which is conducive to improving the service life of the display panel and making it have good display effect.

[0162] FIG. 15 is a structural schematic diagram of a display panel; FIG. 16 is a color gamut distribution schematic diagram of the display panel in FIG. 15; and FIG. 17 is a spectral curve distribution schematic diagram of the display panel in FIG. 15.

[0163] For example, as shown in FIG. 15, the hole injection layer HIL, the first hole transport layer HTL-1, the second hole transport layer HTL-2, the first charge generation layer 351, the second charge generation layer 352, the first hole blocking layer HBL-1, the second hole blocking layer HBL-2, the first electron transport layer ETL-1, the second electron transport layer ETL-2, the second electrode 420, the electron injection layer Yb, the light extraction layer CPL, and the buffer layer LiF are all integrally arranged. In the display panel, the thickness of the hole injection layer HIL is 150 angstroms, the thickness of the first hole transport layer HTL-1 and the second hole transport layer HTL-2 is 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 is 100 angstroms, the thickness of the first electron transport layer ETL-1 and the second electron transport layer ETL-2 is 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 FIG. 15, the first sub-pixel 210 as a blue sub-pixel has a first sub-emitting layer and a second sub-emitting layer with a thickness of 100 angstroms, and a first adjustment layer and a second adjustment layer with a thickness of 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 as a green sub-pixel has a first sub-emitting layer and a second sub-emitting layer with a thickness of 120 angstroms, and a first adjustment layer and a second adjustment layer with a thickness of 400 angstroms. For example, the third sub-pixel 230 as a red sub-pixel has a first sub-emitting layer and a second sub-emitting layer with a thickness of 390 angstroms, and a first adjustment layer and a second adjustment layer with a thickness of 500 angstroms.

[0165] For example, as shown in FIG. 16, when the display panel has a color gamut distribution result R1 with a gray scale of 255, the overall color gamut value is 103%; the display panel has a color gamut distribution result R2 with a gray scale of 8, and the overall color gamut value is 96%, i.e. the deviation of the overall color gamut with a gray scale of 255 is 7%. When the gray scale is 255, the color gamut value of the first sub-pixel 210 is E3, and the deviation ΔBy between the color gamut value when the gray scale is 8 is 0.023; the color gamut value of the second sub-pixel 220 is E2, and the deviation ΔGx between the color gamut value when the gray scale is 8 is 0.003; the color gamut value of the third sub-pixel 230 is E1, and the deviation ΔRx between the color gamut value when the gray scale is 8 is 0.013.

[0166] As shown in FIGS. 15-17, the deviation of the first sub-pixel 210 between the color gamut values at the gray scale of 255 and 8 is large, and thus the display effect of the display panel is greatly affected by the crosstalk of the first sub-pixel 210 at low gray scale (e.g., low brightness). For example, as shown in FIG. 17, when the first sub-pixel 210 emits light alone, the spectral curve has a peak value corresponding to red light at a wavelength of 600-650 nm, and thus the third sub-pixel 230 can emit light at the same time.

[0167] FIG. 18 is a schematic structural diagram of another display panel; FIG. 19 is a schematic diagram of the color gamut distribution of the display panel in FIG. 18; FIG. 20 is a schematic diagram of the spectral curve distribution of the display panel in FIG. 18; and FIG. 21 is a schematic diagram of the brightness decay ratio distribution of the display panel in FIG. 18.

[0168] For example, compared with the display panel shown in FIG. 15, the display panel shown in FIG. 18 is different in that the first charge generation layers of the adjacent sub-pixels are spaced apart from each other, for example, the first charge generation layer of the third sub-pixel 230 is spaced apart from the first charge generation layer of the second sub-pixel 220, and the first charge generation layer of the second sub-pixel 220 is spaced apart from the first charge generation layer of the first sub-pixel 210. As shown in FIG. 18, the mass percentage of the first dopant in the first charge generation layer 351 is 15.0%. For other structures of the display panel in FIG. 18, refer to the related descriptions of FIG. 15 in the above embodiments, which are not repeated here.

[0169] For example, as shown in FIG. 19, when the display panel is at the gray scale of 255, the color gamut distribution result is R1, and the overall color gamut value is 103%; when the display panel is at the gray scale of 8, the color gamut distribution result is R2, and the overall color gamut value is 98%, i.e., the deviation of the overall color gamut at the gray scale of 255 is 5%. When the gray scale is 255, the color gamut value of the first sub-pixel 210 is E3, and the deviation of the color gamut value between the gray scale of 255 and 8 is △By of 0.017; the color gamut value of the second sub-pixel 220 is E2, and the deviation of the color gamut value between the gray scale of 255 and 8 is △Gx of 0.002; and the color gamut value of the third sub-pixel 230 is E1, and the deviation of the color gamut value between the gray scale of 255 and 8 is △Rx of 0.001.

[0170] As shown in FIG. 20, when the first sub-pixel emits light alone, the peak value corresponding to red light at a wavelength of 600-650 nm of the spectral curve is obviously reduced, and thus the probability of crosstalk between the first sub-pixel and the third sub-pixel can be reduced.

[0171] For example, as shown in FIG. 21, when the mass percentage of the first dopant material in the first charge generation layer is 10.0%, the corresponding distribution curve of the luminance decay ratio is R3; when the mass percentage of the first dopant material in the first charge generation layer is 15.0%, the corresponding distribution curve of the luminance decay ratio is R4. According to FIG. 21, when the mass percentage of the first dopant material in the first charge generation layer is increased to 15.0%, the time corresponding to the distribution curve R3 of the luminance decay ratio can be increased by about 800 hours when the luminance decay ratio is 96% compared to the time corresponding to the distribution curve R4 of the luminance decay ratio.

[0172] FIG. 22 is a structural schematic diagram of another display panel; FIG. 23 is a color gamut distribution schematic diagram of the display panel in FIG. 22; and FIG. 24 is a spectral curve distribution schematic diagram of the display panel in FIG. 22.

[0173] For example, compared with the display panel shown in FIG. 18, the display panel shown in FIG. 22 is different in that the second charge generation layers 352 of adjacent sub-pixels are arranged apart from each other, for example, the second charge generation layer 352 of the third sub-pixel 230 is arranged 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 arranged apart from the second charge generation layer 352 of the first sub-pixel 210. As shown in FIG. 22, 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 in FIG. 22, please refer to the related descriptions about FIG. 18 in the above embodiments, which will not be repeated here.

[0174] For example, as shown in FIG. 23, when the display panel is in the gray scale of 255, the color gamut distribution result is R1, and the overall color gamut value is 103%; when the display panel is in the gray scale of 8, the color gamut distribution result is R2, and the overall color gamut value is 100%, i.e., the deviation of the overall color gamut compared with the gray scale of 255 is 3%. When the gray scale is 255, the color gamut value of the third sub-pixel 230 is E1, and the deviation Rx between the color gamut value when the gray scale is 8 is 0.002; the color gamut value of the second sub-pixel 220 is E2, and the deviation Rx between the color gamut value when the gray scale is 8 is 0.001; the color gamut value of the first sub-pixel 210 is E3, and the deviation By between the color gamut value when the gray scale is 8 is 0.017.

[0175] It can be seen that, compared with the result shown in FIG. 19, the second charge generation layer of adjacent sub-pixels is arranged to be spaced from each other, which can further reduce the deviation of the overall color gamut of the sub-pixels of the display panel at the gray scale of 255 and 8. At the same time, as shown in FIG. 24, when the first sub-pixel emits light alone, the peak value of the spectral curve corresponding to red light at a wavelength of 600 nm to 650 nm is further reduced, so that the probability of crosstalk between the first sub-pixel and the third sub-pixel can be further reduced. In addition, by increasing the mass percentage of the second dopant material in the second charge generation layer to 4.0% (for example, in the display panel in FIGS. 15 and 18, the mass percentage of the second dopant material in the second charge generation layer is 2.0%), the luminous efficiency of the display panel can be increased by 10%.

[0176] Embodiments of the present disclosure also provide a display device comprising the display panel described in any of the above embodiments. Therefore, the technical effects of the display panel described above can also be embodied on the display device, which will not be described here.

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

[0178] For example, as shown in FIGS. 25-26, the manufacturing method of the display panel comprises: sequentially preparing a substrate 100, forming a pixel circuit 900 on the substrate 100, arranging a planarization layer 700, and patterning a plurality of first electrodes 410 of sub-pixels, and the first electrodes 410 of adjacent sub-pixels are arranged to be spaced from each other.

[0179] For example, as shown in FIG. 25, the manufacturing method of the display panel further comprises forming a first partial film layer 3101 in the light-emitting functional layer. For example, as shown in FIGS. 2 and 18, the first partial film layer 3101 can comprise a hole injection layer HIL, a second hole transport layer HTL-2, a second light-emitting layer U2, a second hole blocking layer HBL-2, a second electron transport layer ETL-2 and a second charge generation layer 352, for example, each film layer in the first partial film layer 3101 is arranged to be integral, except for the second light-emitting layer U2.

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

[0181] For example, as shown in FIG. 26, the first optical adhesive layer 3120 is subjected to photolithography processing, so that the part of the first optical adhesive layer 3120 corresponding to the sub-pixel of a specific color is removed. For example, FIG. 26 illustrates the removal of the part of the first optical adhesive layer 3120 corresponding to the third sub-pixel 230 emitting red light, but embodiments of the present disclosure are not limited thereto. In some embodiments, the part of the first optical adhesive layer 3120 corresponding to the first sub-pixel 210 emitting blue light, or the part of the first optical adhesive layer 3120 corresponding to the second sub-pixel 220 emitting green light, can also be removed. For example, as shown in FIG. 26, the first part of the optical adhesive layer 10110 in the first optical adhesive layer 3120 corresponding to the second sub-pixel 220 emitting green light and the first sub-pixel 210 emitting blue light is retained.

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

[0183] For example, as shown in FIG. 28, the method of manufacturing the display panel further includes: subjecting the first charge generation layer 351 to photolithography processing to remove the part of the first charge generation layer 351 corresponding to the first sub-pixel 210 and the second sub-pixel 220, and retain the part of the first charge generation layer 351 corresponding to the third sub-pixel 230. At the same time, the first part of the optical adhesive layer 10110 in the first optical adhesive layer 3120 corresponding to the second sub-pixel 220 emitting green light and the first sub-pixel 210 emitting blue light (see FIG. 27) is removed together, so that the first charge generation layer 351 of the third sub-pixel 230 can be formed.

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

[0185] For example, as shown in FIGS. 31-32, a first charge generation layer 351 is formed on the second part of the optical adhesive layer 31301. For the sake of convenience, the same reference number is used for the newly formed first charge generation layer 351. Then, the newly formed first charge generation layer 351 is subjected to photolithography processing to remove the part corresponding to the first sub-pixel 210 and the third sub-pixel 230, and to retain the part corresponding to the second sub-pixel 220. At the same time, the part of the second part of the optical adhesive layer 31301 corresponding to the first sub-pixel 210 and the second sub-pixel 220 is removed together, so that the first charge generation layer 351 of the second sub-pixel 220 can be formed. As shown in FIG. 32, the first charge generation layer 351 of the second sub-pixel 220 and the first charge generation layer 351 of the third sub-pixel 230 are arranged apart from each other.

[0186] Similarly, referring to FIGS. 29-32, 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 arranged apart from each other. The specific steps are not described herein.

[0187] For example, referring to FIG. 18, the manufacturing method of the display panel can further include forming a first hole transport layer HTL-1, a first light-emitting layer U1 of the first sub-pixel 210, a first hole blocking layer HBL-1, a first electron transport layer ETL-1, an electron injection layer Yb, a second electrode 420, a light extraction layer CPL, a buffer layer LiF, and an encapsulation layer TFE, etc. The materials of the above-mentioned film layers are conventional materials, which are not described herein.

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

[0189] For example, as shown in FIG. 33, a substrate 100 is provided. The material of the substrate 100 can refer to conventional materials, which are not limited herein.

[0190] For example, as shown in FIG. 34, a plurality of sub-pixels are formed on the substrate 100. 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 element corresponding to each sub-pixel is mentioned in FIG. 34, since the light-emitting element includes many stacked structures, it cannot be shown in this step, and therefore only the pixel circuit 900 is shown in this step.

[0192] For example, as shown in FIG. 35, the first electrodes 410 are patterned. Each adjacent sub-pixel is divided by the first electrodes 410, so that each first electrode 410 corresponds to one sub-pixel.

[0193] For example, as shown in FIG. 36, the pixel defining part 550 is patterned, the pixel defining part 550 includes a plurality of openings 510 to define the light-emitting area of the sub-pixel, the pixel defining part 550 includes the pixel defining part 550, and the pixel defining part 550 surrounds the opening 510. For example, the plurality of openings 510 can include a first opening 1210 corresponding to the first sub-pixel, a second opening 1220 corresponding to the second sub-pixel, and a third opening 1230 corresponding to the third sub-pixel.

[0194] For example, as shown in FIG. 37A, the first light-emitting functional layer 1310, the second electrode first film layer 1420, and the first shielding layer 1510 are formed on the side of the first electrode 410 away from the substrate 100. For example, the first light-emitting functional layer 1310 can include a plurality of film layers stacked, for example, can include a plurality of film layers as shown in FIG. 2, and the embodiments of the present disclosure are not limited thereto.

[0195] For example, as shown in FIG. 37B, the first photoresist layer 1610 is formed on the first shielding layer 1510 and at the position corresponding to the first opening 1210. For example, the material of the first photoresist layer 1610 can refer to the conventional material, which will not be repeated here.

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

[0197] For example, as shown in FIG. 37D, the first photoresist layer 1610 on the side of the first shielding structure 11510 away from the substrate 100 is removed.

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

[0199] For example, as shown in FIG. 38A, the second light-emitting functional layer 2310, the second electrode first film layer 2420, and the second shielding layer 1520 are formed on the side of the light-emitting functional layer 11310 corresponding to the first sub-pixel and the second electrode 11420 away from the substrate 100.

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

[0201] For example, as shown in FIGS. 38B-38C, the second shielding layer 1520 is patterned with the second photoresist layer 1620 as a mask to form a second shielding structure 11520. For example, the second shielding structure 11520 covers only a region 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 embodiments of the present disclosure will not be described again.

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

[0203] For example, as shown in FIGS. 38D-38E, the second light-emitting functional layer 2310 and the second electrode first film layer 2420 are patterned with the second shielding structure 11520 as a mask to form a light-emitting functional layer 21310 and a second electrode 21420 corresponding to the second sub-pixel, and the remaining film layer on the first shielding structure 11510 is removed.

[0204] For example, as shown in FIG. 39, a third light-emitting functional layer 3310, a second electrode first film layer 3420, and a third shielding layer 1530 are formed on the side away from the substrate 100 of the first electrode 410 corresponding to the third sub-pixel.

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

[0206] For example, as shown in FIGS. 40-41, the third shielding layer 1530 is removed except for a portion corresponding to the third opening 1230 with the third photoresist layer 1630 as a mask to form a third shielding structure 11530 corresponding to the third opening 1230.

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

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

[0209] For example, in some embodiments, the manufacturing method of the display panel further includes: removing the first shielding structure 11510, the second shielding structure 11520, and the third shielding structure 11530.

[0210] For example, in some embodiments, referring to FIG. 7, before the corresponding step of FIG. 36, the manufacturing method of the display panel provided by the embodiments of the present disclosure further includes: forming a plurality of auxiliary electrodes 600, and making the auxiliary electrodes 600 located in the interval between the first electrodes 410 of adjacent sub-pixels. After the auxiliary electrodes 600 are manufactured, the steps after FIG. 36 are continued.

[0211] For example, in some embodiments, referring to FIG. 8, before the corresponding step of FIG. 35, the manufacturing method of the display panel provided by the embodiments of the present disclosure further includes: forming a plurality of auxiliary electrodes 600, and forming a planar layer 700, and making the planar layer 700 cover the auxiliary electrodes 600. After the planar layer 700 is manufactured, the steps after FIG. 35 are continued.

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

[0213] For example, in some embodiments, referring to FIG. 1, in the corresponding steps of FIGS. 37A-43, the step of forming the second electrode corresponding to each sub-pixel 200 can be omitted, and only the manufacturing steps of the light-emitting functional layer of each sub-pixel 200 are included. For example, the setting and patterning process of the second electrode first film layer 1420, the second electrode first film layer 2420, and the second electrode first film layer 3420 can be omitted. For example, the second electrode of each sub-pixel can be formed in some steps after FIG. 43. For this scheme, the structure formed after the corresponding steps of FIG. 43 can be referred to FIG. 44.

[0214] For example, in some embodiments, as shown in FIG. 45, after the light-emitting functional layer 310 of each sub-pixel 200 is formed, the manufacturing method of the display panel further includes: forming an auxiliary electrode 600 on the side of the pixel defining portion 550 away from the substrate 100. The structural characteristics of the auxiliary electrode 600 can be referred to the related description in the foregoing embodiments, which will not be repeated here.

[0215] For example, as shown in FIG. 46, the manufacturing method of the display panel further includes: forming an insulating pattern 800, and making at least part of the insulating pattern 800 located between the auxiliary electrode 600 and the light-emitting functional layer 310, so that the auxiliary electrode 600 and the light-emitting functional layer 310 are insulated from each other.

[0216] For example, referring to FIG. 1, after the fabrication of the insulation pattern 800 is completed, the method for fabricating the display panel further includes forming the second electrode 420 of each sub-pixel 200 such that the second electrodes 420 of adjacent sub-pixels 200 are arranged apart from each other, and the second electrode 420 of at least part of the sub-pixels 200 is electrically connected through the auxiliary electrode 600. For the structure of the insulation pattern 800, please refer to the related description of the above-mentioned embodiments, which will not be repeated here.

[0217] The following points need to be explained:

[0218] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can be referred to the general design.

[0219] (2) In the case of no conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0220] The above only describes exemplary embodiments of the present disclosure, and is not intended to limit the protection scope of the present disclosure, which is determined by the appended claims.

Claims

1. A display panel, comprising: a substrate; a plurality of sub-pixels on the substrate, the sub-pixels comprising a light emitting element comprising a light emitting functional layer, and a first electrode and a second electrode on both sides of the light emitting functional layer, the first electrode being closer to the substrate than the second electrode, the first electrodes of adjacent sub-pixels being spaced apart from each other, the plurality of sub-pixels comprising a first sub-pixel and a second sub-pixel adjacent to each other; a pixel defining portion between the light emitting functional layer and the substrate, the pixel defining portion comprising a plurality of openings configured to expose at least part of the first electrodes of the sub-pixels to define 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, a distance between the light emitting area of the first sub-pixel and the light emitting area of the second sub-pixel is no more than 10 pm, 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 comprising a plurality of auxiliary electrodes on the substrate, the second electrodes of at least part of the sub-pixels being electrically connected through the auxiliary electrodes.

2. The display panel of claim 1, wherein, a projection of the auxiliary electrodes on the substrate at least partially overlaps with a projection of the pixel defining portion on the substrate.

3. The display panel of claim 2, wherein, adjacent auxiliary electrodes are spaced apart from each other.

4. The display panel of claim 2, wherein, the plurality of auxiliary electrodes are in an integral structure.

5. The display panel of claim 3, wherein, the plurality of auxiliary electrodes comprise a plurality of first auxiliary electrode portions, a plurality of second auxiliary electrode portions, and a plurality of third auxiliary electrode portions, the second electrodes of a part of the sub-pixels are electrically connected through the first auxiliary electrode portions, the second electrodes of another part of the sub-pixels are electrically connected through the second auxiliary electrode portions, and the second electrodes of yet another part of the sub-pixels are electrically connected through the third auxiliary electrode portions, the first auxiliary electrode portions, the second auxiliary electrode portions, and the third auxiliary electrode portions are independently applied with signals, respectively.

6. The display panel of claim 5, wherein, the plurality of sub-pixels comprise first color sub-pixels, second color sub-pixels, and third color sub-pixels emitting different colors of light, the light emitting functional layers of the first color sub-pixels, the second color sub-pixels, and the third color sub-pixels are spaced apart from each other, and the second electrodes of the first color sub-pixels, the second color sub-pixels, and the third color sub-pixels are spaced apart from each other.

7. The display panel of claim 6, wherein, the second electrodes of at least part of the first color sub-pixels are electrically connected through the first auxiliary electrode portions, the second electrodes of at least part of the second color sub-pixels are electrically connected through the second auxiliary electrode portions, and the second electrodes of at least part of the third color sub-pixels are electrically connected through the third auxiliary electrode portions.

8. The display panel of claim 7, wherein, The display panel further comprises a flat layer located on a side of the pixel defining portion close to the substrate substrate, the first auxiliary electrode portion is located between the flat layer and the substrate substrate, the second auxiliary electrode portion and the third auxiliary electrode portion are both located between the pixel defining portion and the flat layer, The second electrode of the first color sub-pixel is electrically connected with the first auxiliary electrode portion through a first connecting hole in the flat layer, the second electrode of the second color sub-pixel is electrically connected with the second auxiliary electrode portion through a second connecting hole in the pixel defining portion, and the second electrode of the third color sub-pixel is electrically connected with the third auxiliary electrode portion through a third connecting hole in the pixel defining portion.

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

10. The display panel of claim 9, wherein, The display panel further comprises an insulating pattern located on a side of the pixel defining portion away from the substrate substrate, and at least part of the insulating pattern is located between the light-emitting functional layer of any one of the at least part of the sub-pixels and the auxiliary electrode, so that the light-emitting functional layer of the sub-pixel and the auxiliary electrode are insulated from each other.

11. The display panel of 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 of any of claims 9-11, wherein, The surface of the auxiliary electrode close to the substrate 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 substrate substrate than the surface of the second electrode away from the pixel defining portion.

13. The display panel of any of claims 2-7, wherein, The auxiliary electrode is covered by part of the pixel defining portion, and the second electrode of any one of the at least part of the sub-pixels is electrically connected with the auxiliary electrode through a via hole in the pixel defining portion.

14. The display panel of any of claims 2-7, wherein, The display panel further comprises a flat layer located on a side of the pixel defining portion close to the substrate substrate, the auxiliary electrode is covered by part of the flat layer, The second electrode of any one of the at least part of the sub-pixels is electrically connected with the auxiliary electrode through a via hole in the flat layer.

15. The display panel of claim 2, wherein, The plurality of sub-pixels further comprises 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 in 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 comprises a plurality of pixel units, the plurality of pixel units are arranged in an array on the substrate substrate to form a plurality of pixel unit columns arranged in a first direction and a plurality of pixel unit rows arranged in a second direction, Wherein, the plurality of first sub-pixels in the pixel unit column are arranged in 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.

16. The display panel of claim 15, wherein, The plurality of auxiliary electrodes comprises a plurality of first sub-auxiliary electrodes and second sub-auxiliary electrodes, the first sub-auxiliary electrodes extend along the second direction, the second sub-auxiliary electrodes extend along the first direction, each of the first sub-auxiliary electrodes is connected to the second sub-auxiliary electrodes, The first sub-auxiliary electrodes are located between the first sub-pixels and the third sub-pixels, 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 of any of claims 1-16, wherein, The auxiliary electrodes between adjacent sub-pixels in the at least part of the sub-pixels are rectangular, trapezoidal or elliptical in a cross section of a plane, the plane is perpendicular to the substrate and parallel to the direction of the geometric center line of the adjacent sub-pixels; and / or the size of the auxiliary electrodes in the direction perpendicular to the substrate is 1-2 μm.

18. The display panel of claim 3, wherein, The auxiliary electrodes are rectangular in orthographic projection on the substrate, and the side length of the rectangle is 17-20 μm.

19. The display panel of claim 2, wherein, The light-emitting functional layer of the sub-pixel comprises a first light-emitting layer, a first charge generation layer and a second light-emitting layer which are stacked in the direction perpendicular to the substrate, 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 substrate than the second light-emitting layer, The 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 18.0-21.5 μm.

20. The display panel of claim 19, wherein, The first charge generation layer comprises 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 12-18%.

21. The display panel of claim 20, wherein, The mass percentage of the first doping material in the first charge generation layer of the sub-pixel emitting different colors of light is different.

22. The display panel of any of claims 19-21, wherein, The first host material in the first charge generation layer comprises a triarylamine compound, and the first doping material comprises a lithium quinoline complex.

23. The display panel of any of claims 19-22, wherein, The light-emitting region of the first sub-pixel is a first rectangle in orthographic projection on the substrate, the first charge generation layer of the first sub-pixel is a second rectangle in orthographic projection on the substrate, 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 14.5-17.0 μm, and the length of the second rectangle is 52-60 μm.

24. The display panel of any of claims 19-23, wherein, The light-emitting functional layer of the sub-pixel further comprises 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 comprises 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 3-6%.

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

26. The display panel of 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 of claim 26, wherein, The second pixel aperture ratio is 1.4-1.8 times the third pixel aperture ratio, and the first pixel aperture ratio is 1.69-2.80 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%-65%.

28. The display panel of claim 24 or 25, wherein, The light-emitting functional layer further comprises 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 which are stacked in a direction perpendicular to the substrate, and the display panel further comprises 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 substrate, and 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, 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 substrate, and the light extraction layer is closer to the substrate than the buffer layer, The first light-emitting layer of the sub-pixel comprises a first sub-light-emitting layer and a first adjustment layer, and the first sub-light-emitting layer is farther away from the substrate than the first adjustment layer; and the second light-emitting layer of the sub-pixel comprises a second sub-light-emitting layer and a second adjustment layer, and the second sub-light-emitting layer is farther away from the substrate than the second adjustment layer.

29. The display panel of claim 28, wherein, The thickness of the hole injection layer of the sub-pixel is 100-200 angstroms, the thickness of the first hole transport layer and the second hole transport layer is 300-700 angstroms, the thickness of the first charge generation layer is 500-700 angstroms, the thickness of the second charge generation layer is 100-300 angstroms, the thickness of the first hole blocking layer and the second hole blocking layer is 50-150 angstroms, the thickness of the first electron transport layer and the second electron transport layer is 300-400 angstroms, the thickness of the second electrode is 100-300 angstroms, the thickness of the electron injection layer is 10-30 angstroms, the thickness of the light extraction layer is 700-1200 angstroms, and the thickness of the buffer layer is 600-900 angstroms. The multiple sub-pixels of the display panel include first color sub-pixels, second color sub-pixels and third color sub-pixels emitting different color lights, thicknesses of the first sub-emitting layer, the second sub-emitting layer, the first adjusting layer and the second adjusting layer of the first color sub-pixels are all 100-200 angstroms; thicknesses of the first sub-emitting layer and the second sub-emitting layer of the second color sub-pixels are all 100-300 angstroms, thicknesses of the first adjusting layer and the second adjusting layer of the second color sub-pixels are all 300-500 angstroms; thicknesses of the first sub-emitting layer and the second sub-emitting layer of the third color sub-pixels are all 300-500 angstroms, thicknesses of the first adjusting layer and the second adjusting layer of the third color sub-pixels are all 500-700 angstroms.

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

Images