Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a light-emitting element, and a first light-emitting sub-element is located on the side, close to a substrate, of a second light-emitting sub-element; the first sub light-emitting element comprises a first cathode layer, a first light-emitting layer and a first anode layer; the second sub light-emitting element comprises a second anode layer, a second light-emitting layer and a second cathode layer; comprising an electrode connecting part, is located on the side, away from the substrate, of the electrode connecting part, and is electrically connected with the second anode layer through the electrode connecting part; comprising a pixel limiting part, the first pixel limiting part is located on one side of the substrate and located between the two adjacent first cathode layers, and the second pixel limiting part is located between the two adjacent second anode layers; the orthographic projection of the first pixel limiting branch part to the substrate is overlapped with the orthographic projection of the second anode layer to the substrate, the orthographic projection of the second pixel limiting branch part to the substrate is overlapped with the orthographic projection of the first anode layer to the substrate, and the display effect of the display panel is improved.

Description

Technical Field

[0001] This invention relates to the field of display panel technology, and more particularly to a display panel, its manufacturing method, and a display device. Background Technology

[0002] With the continuous development of display technology, display panels have been widely used in people's production and daily life. In order to better meet people's needs, the film structure and other aspects of the display panel can be finely adjusted to improve the display brightness and ensure the display effect. Summary of the Invention

[0003] This invention provides a display panel and its manufacturing method, as well as a display device. By adjusting the arrangement of the light-emitting elements in the display panel, the effective light-emitting area in the display panel is increased, thereby improving the brightness of the display panel and enhancing its display effect.

[0004] In a first aspect, embodiments of the present invention provide a display panel, including a substrate and a plurality of light-emitting elements located on one side of the substrate;

[0005] The light-emitting element includes a first sub-light-emitting element and a second sub-light-emitting element, wherein the first sub-light-emitting element is located on the side of the second sub-light-emitting element closer to the substrate;

[0006] The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The first cathode layer is located on one side of the substrate, the first light-emitting layer is located on the side of the first cathode layer away from the substrate, and the first anode layer is located on the side of the first light-emitting layer away from the first cathode layer. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. The second anode layer is located on the side of the first anode layer away from the substrate, the second light-emitting layer is located on the side of the second anode layer away from the first anode layer, and the second cathode layer is located on the side of the second light-emitting layer away from the second anode layer.

[0007] The display panel further includes an electrode connection portion located on one side of the substrate, and the second anode layer located on the side of the electrode connection portion away from the substrate. The first anode layer is electrically connected to the second anode layer through the electrode connection portion.

[0008] The display panel further includes a pixel defining portion, which includes a first pixel defining portion and a second pixel defining portion. The first pixel defining portion is located on one side of the substrate and between two adjacent first cathode layers. The second pixel defining portion is disposed on the same layer as the second anode layer and between two adjacent second anode layers.

[0009] Wherein, the orthographic projection of the first pixel defined portion onto the substrate and the orthographic projection of the second anode layer onto the substrate at least partially overlap, and the orthographic projection of the second pixel defined portion onto the substrate and the orthographic projection of the first anode layer onto the substrate at least partially overlap.

[0010] Optionally, the first pixel-defined portion includes a first pixel portion unit and a second pixel portion unit;

[0011] Along the first direction, the first pixel division unit and the second pixel division unit are located on both sides of the first cathode layer, the first pixel division unit is located on the side of the second pixel division unit closer to the electrode connection portion, and the orthographic projection of the first light-emitting layer on the substrate and the orthographic projection of the first pixel division unit on the substrate at least partially overlap, and the orthographic projection of the first light-emitting layer on the substrate and the orthographic projection of the second pixel division unit on the substrate at least do not overlap.

[0012] Wherein, along the thickness direction of the substrate, the height of the electrode connection portion is H1, the height of the first pixel subunit is H2, and the height of the second pixel subunit is H3, satisfying: H1=H3, H2<H3, H1, H2 and H3 are positive numbers, and the first direction is parallel to the plane where the substrate is located.

[0013] Optionally, the orthographic projection of the second pixel portion onto the substrate at least partially overlaps with the orthographic projection of the second anode layer onto the substrate.

[0014] Optionally, the display panel further includes a filler layer located on the side of the second sub-light-emitting element away from the substrate.

[0015] Optionally, the display panel further includes a thin-film encapsulation layer, which includes a first thin-film encapsulation layer and a second thin-film encapsulation layer. The first thin-film encapsulation layer is located on the side of the first anode layer away from the substrate, and the second thin-film encapsulation layer is located on the side of the second cathode layer away from the substrate.

[0016] Wherein, along the thickness direction of the substrate, the distance from the surface of the first thin film encapsulation layer away from the substrate to the substrate is S1, and the distance from the surface of the electrode connection portion away from the substrate to the substrate is S2, satisfying: S1 = S2, and S1 and S2 are positive numbers.

[0017] Optionally, the display panel further includes a thin-film encapsulation layer, which includes a first thin-film encapsulation layer and a second thin-film encapsulation layer. The first thin-film encapsulation layer is located on the side of the first anode layer away from the substrate, and the second thin-film encapsulation layer is located on the side of the second cathode layer away from the substrate.

[0018] Wherein, along the thickness direction of the substrate, the distance from the surface of the first thin film encapsulation layer away from the substrate to the substrate is S1, and the distance from the surface of the electrode connection portion away from the substrate to the substrate is S2, satisfying: S1 < S2.

[0019] The pixel defining portion further includes a third pixel defining portion, which is located on the side of the first thin film encapsulation layer away from the substrate. The distance from the surface of the third pixel defining portion away from the substrate to the substrate is S3, satisfying: S1+S3=S2, where S1, S2 and S3 are positive numbers.

[0020] Optionally, the light-emitting element includes a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element, wherein the light emission wavelengths of the first color light-emitting element, the second color light-emitting element, and the third color light-emitting element are different.

[0021] Optionally, the display panel further includes a light filter layer, which includes a first light filter layer, a second light filter layer, and a third light filter layer;

[0022] The first filter layer is located on the side of the second sub-emitting element of the first color light-emitting element away from the substrate, and the orthogonal projection of the first filter layer onto the substrate covers the orthogonal projection of the first sub-emitting element of the first color light-emitting element onto the substrate, and the orthogonal projection of the first filter layer onto the substrate covers the orthogonal projection of the second sub-emitting element of the first color light-emitting element onto the substrate.

[0023] The second filter layer is located on the side of the second sub-light-emitting element of the second color light-emitting element away from the substrate, and the orthogonal projection of the second filter layer onto the substrate covers the orthogonal projection of the first sub-light-emitting element of the second color light-emitting element onto the substrate.

[0024] The third filter layer is located on the side of the second sub-emitting element of the third color light-emitting element away from the substrate, and the orthogonal projection of the third filter layer onto the substrate covers the orthogonal projection of the first sub-emitting element of the third color light-emitting element onto the substrate, and the orthogonal projection of the third filter layer onto the substrate covers the orthogonal projection of the second sub-emitting element of the third color light-emitting element onto the substrate.

[0025] In a second aspect, embodiments of the present invention provide a method for preparing a display panel, used to prepare the display panel described in any one of the first aspects, the method comprising:

[0026] A substrate is provided, and an electrode connection portion is formed on one side of the substrate;

[0027] A first pixel definition portion is formed on one side of the substrate;

[0028] A first sub-light-emitting element is fabricated on one side of the substrate. The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The first cathode layer is located on one side of the substrate, the first light-emitting layer is located on the side of the first cathode layer away from the substrate, and the first anode layer is located on the side of the first light-emitting layer away from the first cathode layer.

[0029] A second sub-light-emitting element is formed on the side of the electrode connection portion away from the substrate. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. A second pixel-defining portion is formed between two adjacent second anode layers. The second anode layer is located on the side of the first anode layer away from the substrate, the second light-emitting layer is located on the side of the second anode layer away from the first anode layer, and the second cathode layer is located on the side of the second light-emitting layer away from the second anode layer. The second anode layer is located on the side of the electrode connection portion away from the substrate, and the first anode layer is electrically connected to the second anode layer through the electrode connection portion. The second pixel-defining portion is disposed on the same layer as the second anode layer, wherein the orthographic projection of the first pixel-defining portion onto the substrate at least partially overlaps with the orthographic projection of the second anode layer onto the substrate.

[0030] Thirdly, embodiments of the present invention provide a display device including the display panel described in any one of the first aspects.

[0031] This invention provides a display panel including light-emitting elements, which include a first sub-light-emitting element and a second sub-light-emitting element. The first sub-light-emitting element is located on the side of the second sub-light-emitting element closer to the substrate. The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. The display panel also includes an electrode connection portion, where the first anode layer is located on the side of the electrode connection portion away from the substrate, and the first anode layer is electrically connected to the second anode layer through the electrode connection portion. The display panel also includes a pixel defining portion, where the first pixel defining portion is located on one side of the substrate and between two adjacent first cathode layers, and the second pixel defining portion is located between two adjacent second anode layers. The orthographic projection of the first pixel defining portion onto the substrate overlaps with the orthographic projection of the second anode layer onto the substrate, and the orthographic projection of the second pixel defining portion onto the substrate overlaps with the orthographic projection of the first anode layer onto the substrate. By adjusting the display panel to simultaneously include a first sub-light-emitting element and a second sub-light-emitting element, and adjusting the relative positions of the first sub-light-emitting element and the second sub-light-emitting element, the effective light-emitting area of ​​the light-emitting elements in the display panel can be increased, thereby improving the display brightness and display effect of the display panel. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 An enlarged schematic diagram of region A in the middle;

[0035] Figure 3 yes Figure 1 An enlarged schematic diagram of region B in the middle;

[0036] Figure 4 This is a top view schematic diagram of a light-emitting element provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of another display panel provided in an embodiment of the present invention;

[0039] Figure 7 This is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram illustrating the manufacturing process of a display panel according to an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the manufacturing process of another display panel provided in an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," and "right," as well as other orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0047] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. Figure 2 yes Figure 1 An enlarged schematic diagram of region A in the middle, for reference. Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a display panel 10, which includes a substrate 100 and a plurality of light-emitting elements 200 located on one side of the substrate 100; the light-emitting elements 200 include a first sub-light-emitting element 210 and a second sub-light-emitting element 220, the first sub-light-emitting element 210 being located on the side of the second sub-light-emitting element 220 closer to the substrate 100; the first sub-light-emitting element 210 includes a first cathode layer 210a, a first light-emitting layer 210b, and a first anode layer 210c, the first cathode layer 210a being located on one side of the substrate 100, the first sub-light-emitting element 210b ... A light-emitting layer 210b is located on the side of the first cathode layer 210a away from the substrate 100, and a first anode layer 210c is located on the side of the first light-emitting layer 210b away from the first cathode layer 210a; the second sub-light-emitting element 220 includes a second anode layer 220c, a second light-emitting layer 220b, and a second cathode layer 220a. The second anode layer 220c is located on the side of the first anode layer 210c away from the substrate 100, and the second light-emitting layer 220b is located on the side of the second anode layer 220c away from the first anode layer 210c. The second cathode layer 220a is located on the side of the first anode layer 210c away from the substrate 100. The display panel 10 further includes an electrode connection portion 300 located on one side of the substrate 100, with the first anode layer 220c located on the side of the electrode connection portion 300 away from the substrate 100. The first anode layer 210c is electrically connected to the second anode layer 220c via the electrode connection portion 300. The display panel 10 also includes a pixel defining portion 400, which includes a first pixel defining portion 410 and a second pixel defining portion 420. The pixel defining portion 410 is located on one side of the substrate 100 and between two adjacent first cathode layers 210a. The second pixel defining portion 420 is disposed on the same layer as the second anode layer 220c and between two adjacent second anode layers 220c. The orthographic projection of the first pixel defining portion 410 onto the substrate 100 and the orthographic projection of the second anode layer 220c onto the substrate 100 overlap at least partially.

[0048] Among them, reference Figure 1As shown, the display panel 10 includes a substrate 100 and a plurality of light-emitting elements 200 located on one side of the substrate 100. The display function of the display panel 10 can be realized by driving the plurality of light-emitting elements 200 to emit light. Specifically, the display panel 10 includes a plurality of circuit structures (not specifically shown in the figure) disposed between the substrate 100 and the light-emitting elements 200, and the light-emitting elements 200 are driven to emit light through the circuit structures. Furthermore, the plurality of light-emitting elements 200 disposed on the substrate 100 may include light-emitting elements of different colors, thereby realizing a color display effect of the display panel 10.

[0049] Furthermore, the light-emitting element 200 includes a first sub-light-emitting element 210 and a second sub-light-emitting element 220, wherein the first sub-light-emitting element 210 is located on the side of the second sub-light-emitting element 220 closer to the substrate 100. Specifically, refer to... Figure 1 As shown, the first sub-light-emitting element 210 and the second sub-light-emitting element 220 are located at different film layers of the display panel 10.

[0050] For details, please refer to Figure 1As shown, the first sub-light-emitting element 210 includes a first cathode layer 210a, a first light-emitting layer 210b, and a first anode layer 210c stacked together, wherein the first light-emitting layer 210b is located between the first cathode layer 210a and the first anode layer 210c. Exemplarily, the first light-emitting layer 210b may include multiple film layer structures, such as a hole injection layer (HIL), a hole transport layer (HTL), a prime layer, an emitting layer (EML), a hole block layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL). The embodiments of the present invention do not specifically limit the specific film layer configuration in the first light-emitting layer 210b and can make adaptive adjustments according to actual needs. Furthermore, the light-emitting principle of the first sub-light-emitting element 210 can be understood as follows: a certain voltage is applied to the first cathode layer 210a and the first anode layer 210c respectively, and holes from the first anode layer 210c and electrons from the first cathode layer 210a form excitons at the light-emitting film layer in the first light-emitting layer 210b. The excitons excite the light-emitting molecules in the light-emitting film layer to emit light, thereby realizing the display effect of the display panel 10. Furthermore, the second sub-emitting element 220 includes a second anode layer 220c, a second light-emitting layer 220b, and a second cathode layer 220a stacked together. The second light-emitting layer 220b may also include multiple film layer structures, such as a hole injection layer (HIL), a hole transport layer (HTL), a prime layer, an emitting layer (EML), a hole block layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL). The specific film layer configuration in the second light-emitting layer 220b is not specifically limited in this embodiment and can be adaptively adjusted according to actual needs. The light-emitting principle of the second sub-emitting element 220 is the same as described above and will not be repeated here.

[0051] Specifically, in combination Figure 1As shown, the first anode layer 210c in the first sub-light-emitting element 210 is closer to the second sub-light-emitting element 210 than the first cathode layer 210a and the first light-emitting layer 210b in the first sub-light-emitting element 210. Similarly, the second anode layer 220c in the second sub-light-emitting element 220 is closer to the first sub-light-emitting element 210 than the second cathode layer 220a and the second light-emitting layer 220b in the second sub-light-emitting element 220. This can also be understood as the cathode and anode layers in the first and second sub-light-emitting elements 210 and 220 being positioned opposite each other. This facilitates connecting the first anode layer 210c and the second anode layer 220c, effectively connecting the first and second sub-light-emitting elements 210 and 220 together, allowing them to emit light. In other words, when the light-emitting element 200 includes only the first sub-light-emitting element 210 or only the second sub-light-emitting element 220, the effective light-emitting area of ​​the light-emitting element 200 is the light-emitting area provided by the first sub-light-emitting element 210 or the effective light-emitting area of ​​the light-emitting element 200 is the light-emitting area provided by the second sub-light-emitting element 220. However, when the light-emitting element 200 includes both the first sub-light-emitting element 210 and the second sub-light-emitting element 220, and the first and second sub-light-emitting elements 210 and 220 are connected, the effective light-emitting area of ​​the light-emitting element 200 is the sum of the light-emitting areas provided by the first sub-light-emitting element 210 and the second sub-light-emitting element 220, thereby increasing the effective light-emitting area of ​​the light-emitting element 200 in the display panel 10. Therefore, by adding the second sub-light-emitting element 220, the display effect of the light-emitting element 200 in the display panel 10 can be improved. It should be noted that the display panel 10 includes multiple light-emitting elements of different colors, and the first sub-light-emitting element 210 and the second sub-light-emitting element 220 used for connection are light-emitting elements 200 that emit light of the same color.

[0052] For details, please refer to Figure 1 As shown, the display panel 10 also includes an electrode connection portion 300 for connecting the first anode layer 210c and the second anode layer 220c that are disposed in different layers, so that the first sub-light-emitting element 210 and the second sub-light-emitting element 220 can emit the same light at the same time, thereby increasing the effective light-emitting area of ​​the corresponding light-emitting element 200.

[0053] For details, please refer to Figure 2As shown, the electrode connection portion 300 is located on one side of the substrate 100, and the first anode layer 210c is electrically connected to the first electrode connection portion 300. The second anode layer 220c is located on the side of the electrode connection portion 300 away from the substrate 100, and is electrically connected to the electrode connection portion 300. The first anode layer 210c is electrically connected to the second anode layer 220c through the electrode connection portion 300. The electrode connection portion 300 can be made of tungsten or other conductive metals; this embodiment of the invention does not impose specific limitations on its material.

[0054] Further reference Figure 1 and Figure 2 As shown, the display panel 10 also includes a pixel defining portion 400, which includes a first pixel defining portion 410. The first pixel defining portion 410 is located on one side of the substrate 100 and between two adjacent first cathode layers 210a, to prevent short circuits between the first cathode layers 210a of different first sub-light-emitting elements 210, ensuring the light-emitting stability of different first sub-light-emitting elements 210, and ensuring the overall display effect of the display panel 10. Further, refer to... Figure 1 and Figure 2 As shown, the pixel limiting part 400 also includes a second pixel limiting part 420. The second pixel limiting part 420 is disposed on the same layer as the second anode layer 220c and is located between two adjacent second anode layers 220c. It is used to prevent the second anode layers 220c between different second sub-light-emitting elements 220 from short-circuiting, to ensure the light-emitting stability of different second sub-light-emitting elements 220, and to ensure the overall display effect of the display panel 10.

[0055] Furthermore, since the material of the pixel limiting portion 400 does not obstruct light, the second pixel limiting portion 420, located on the side of the first sub-light-emitting element 210 away from the substrate 100, will not obstruct the emitted light from the first sub-light-emitting element 210, thus ensuring the light emission effect of the first sub-light-emitting element 210. Specifically, refer to... Figure 1 and Figure 2As shown, the orthographic projection of the first pixel-defining portion 410 onto the substrate 100 at least partially overlaps with the orthographic projection of the second anode layer 220c onto the substrate 100, and the orthographic projection of the second pixel-defining portion 420 onto the substrate 100 at least partially overlaps with the orthographic projection of the first anode layer 210c onto the substrate 100. This can also be understood as the orthographic projection of the effective light-emitting area of ​​the first sub-light-emitting element 210 (the light-emitting area of ​​the first sub-light-emitting element 210 defined by the first pixel-defining portion 410) onto the substrate 100 and the orthographic projection of the effective light-emitting area of ​​the second sub-light-emitting element 220 (the light-emitting area of ​​the second sub-light-emitting element 220 defined by the second pixel-defining portion 420) onto the substrate 100 being misaligned. Therefore, when the light-emitting element 200 includes the first sub-light-emitting element 210 and the second sub-light-emitting element 220, the overall effective light-emitting area can be increased, improving the light-emitting effect of the light-emitting element 200 and ensuring the overall display effect of the display panel 10.

[0056] In summary, the embodiments of the present invention provide a display panel, which includes light-emitting elements, including a first sub-light-emitting element and a second sub-light-emitting element. The first sub-light-emitting element is located on the side of the second sub-light-emitting element closer to the substrate. The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. The display panel also includes an electrode connection portion, with the first anode layer located on the side of the electrode connection portion away from the substrate, and the first anode layer electrically connected to the second anode layer through the electrode connection portion. The display panel also includes a pixel defining portion, with the first pixel defining portion located on one side of the substrate and between two adjacent first cathode layers, and the second pixel defining portion located between two adjacent second anode layers. The orthographic projection of the first pixel defining portion onto the substrate overlaps with the orthographic projection of the second anode layer onto the substrate, and the orthographic projection of the second pixel defining portion onto the substrate overlaps with the orthographic projection of the first anode layer onto the substrate. By adjusting the display panel to simultaneously include a first sub-light-emitting element and a second sub-light-emitting element, and adjusting the relative positions of the first sub-light-emitting element and the second sub-light-emitting element, the effective light-emitting area of ​​the light-emitting elements in the display panel can be increased, thereby improving the display brightness of the display panel and enhancing the display effect of the display panel.

[0057] Continue to refer to Figure 1 and Figure 2As shown, the first pixel defining portion 410 includes a first pixel portion unit 411 and a second pixel portion unit 412; along the first direction X1, the first pixel portion unit 411 and the second pixel portion unit 412 are located on opposite sides of the first cathode layer 210a, with the first pixel portion unit 411 located on the side of the second pixel portion unit 412 closer to the electrode connection portion 300, and the orthographic projection of the first light-emitting layer 210b onto the substrate 100 and the orthographic projection of the first pixel portion unit 411 onto the substrate 100 are... The shadows at least partially overlap, and the orthographic projection of the first light-emitting layer 210b on the substrate 100 and the orthographic projection of the second pixel distribution unit 412 on the substrate 100 at least do not overlap; wherein, along the thickness direction of the substrate 100, the height of the electrode connection portion 300 is H1, the height of the first pixel distribution unit 411 is H2, and the height of the second pixel distribution unit 412 is H3, satisfying: H1=H3, H2<H3, H1, H2 and H3 are positive numbers, and the first direction X1 is parallel to the plane where the substrate 100 is located.

[0058] Among them, reference Figure 1 and Figure 2 As shown, the first pixel defining portion 410 includes a first pixel defining unit 411 and a second pixel defining unit 412. In the first direction X1, the first pixel defining portion 411 and the second pixel defining unit 412 are located on opposite sides of the first cathode layer 210a and are attached to the first cathode layer 210a. The first pixel defining portion 411 and the second pixel defining portion 412 insulate different first sub-cathode layers 210a. Specifically, refer to... Figure 1 and Figure 2 As shown, the first pixel division unit 411 is located on the side of the second pixel division unit 412 near the electrode connection portion 300. It should be noted that the display panel 10 has a plurality of electrode connection portions 300 on the substrate 100, and the first pixel division unit 411 is located on the side of the second pixel division unit 412 near the electrode connection portion 300 that is electrically connected to the first anode layer 210c in the first sub-light-emitting element 210.

[0059] Further reference Figure 1 and Figure 2As shown, the orthographic projection of the first light-emitting layer 210b on the substrate 100 at least partially overlaps with the orthographic projection of the first pixel distribution unit 411 on the substrate 100, and the orthographic projection of the first light-emitting layer 210b on the substrate 100 at least does not overlap with the orthographic projection of the second pixel distribution unit 412 on the substrate 100. This can be understood as follows: although the first pixel division unit 411 cuts off the first cathode layer 210a, the first light-emitting layer 210b and the first anode layer 210c can be disposed on the side of the first pixel division unit 411 away from the substrate 100. The first anode layer 210c achieves electrical connection with the electrode connection portion 300 through the first pixel division unit 411 by "climbing"; while the second pixel division unit 412 cuts off the first cathode layer 210a, the first light-emitting layer 210b and the first anode layer 210c to avoid short circuit with the first sub-light-emitting element 210 on the other side of the second pixel division unit 412 along the first direction X1, thus ensuring the light-emitting effect of different light-emitting elements 200.

[0060] It should be noted that, in combination Figure 1 As shown, the substrate 100 of the display panel 10 includes a plurality of first sub-light-emitting elements 210 arranged along a first direction X1. Within the arrangement range of a first sub-light-emitting element 210, along the first direction X1, located away from the first pixel division unit 411 at the electrode connection portion 300, there is another second pixel division unit 412. The second pixel division unit 412 is used to cut off the first cathode layer 210a, the first light-emitting layer 210b, and the first anode layer 210c in the other first sub-light-emitting element 210.

[0061] Further reference Figure 1 As shown, along the thickness direction of the substrate 100, the height of the electrode connection portion 300 is H1, and the height of the second pixel division unit 412 is H3, where H1 = H3. The film layer containing the second anode layer 220c is located on the side of the electrode connection portion 300 and the second pixel division unit 412 away from the substrate. Therefore, adjusting the heights of the electrode connection portion 300 and the second pixel division unit 412 to be flush ensures the flatness of the overall structure of the second anode layer 220c. The height of the first pixel division unit 411 is H2, satisfying H2 < H3. This can be understood as the first pixel division unit 411 only truncating the first cathode layer 210a; the first anode layer 210c and the first light-emitting layer 210b still need to "climb" around the first pixel division unit 411 to electrically connect with the electrode connection portion 300. Therefore, the height of the first pixel division unit 411 is less than the height of the electrode connection portion 300 and also less than the height of the second pixel unit 412.

[0062] Figure 3 yes Figure 1 An enlarged schematic diagram of region B in the middle. Figure 4This is a top view schematic diagram of a light-emitting element provided in an embodiment of the present invention, with reference to... Figures 1 to 4 As shown, the orthographic projection of the second pixel defining portion 420 onto the substrate 100 at least partially overlaps with the orthographic projection of the second anode layer 220c onto the substrate 100.

[0063] Further reference Figure 1 and Figure 3 As shown, the orthographic projection of the second pixel defining portion 420 onto the substrate 100 at least partially overlaps with the orthographic projection of the second anode layer 220c onto the substrate 100. This can be understood as the second pixel defining portion 420 having a portion of its structure located between two adjacent second anode layers 220c; the second pixel defining portion 420 also has a portion of its structure located on the side of the adjacent second anode layer 220c away from the substrate 100, that is, a portion of the second pixel defining portion 420 covers the edge of the second anode layer 220c (see reference). Figure 3 (The region shown in k0).

[0064] Among them, reference Figure 3 As shown, in the area indicated by k0, the second anode layer 220c is not bonded to the second light-emitting layer 220b, therefore this area does not emit light. The overlapping area between the orthographic projection of the second pixel-defining portion 420 onto the substrate 100 and the orthographic projection of the second anode layer 220c onto the substrate 100 can be understood as the pixel-defining portion's edge area. Since the existence of the pixel-defining portion's edge area in the light-emitting element affects the effective light-emitting area of ​​the light-emitting element, in this embodiment of the invention, the light-emitting element emits light through both the first and second sub-light-emitting elements, and its improvement in the light-emitting area is far greater than the impact of the edge area. Therefore, this embodiment of the invention can improve the overall light-emitting area of ​​the light-emitting element and ensure the display effect of the display panel.

[0065] For example, refer to Figure 3 and Figure 4 As shown, the display panel 10 includes multiple different light-emitting elements 200. For example, the display panel 10 includes a first-color light-emitting element 200a, a second-color light-emitting element 200b, and a third-color light-emitting element 200c. It should be noted that each of the first-color light-emitting element 200a, second-color light-emitting element 200b, and third-color light-emitting element 200c includes a corresponding first sub-light-emitting element 210 and a second sub-light-emitting element 220. However, the arrangement of the first sub-light-emitting element 210 and the second sub-light-emitting element 220 within a single light-emitting element 200 varies across different display panels 10. Figure 4 The first sub-light-emitting element 210 and the second sub-light-emitting element 220 are not specifically shown in the text. Figure 4 This example illustrates the effect of the pixel-defined distribution border area k0 on the light-emitting element 200.

[0066] Specifically, let's select a unit area (La×Lb), where the effective light-emitting area of ​​the first color light-emitting element 200a within the unit area is (c1+c2+c3), the effective light-emitting area of ​​the second color light-emitting element 200b within the unit area is (d1+d2+d3), and the effective light-emitting area of ​​the third color light-emitting element 200c is e1. Then, the aperture ratio M in the corresponding display panel 10 is calculated as follows: M=(c1+c2+c3+d1+d2+d3+e1) / (La×Lb).

[0067] For example, taking La=Lb=8.1 micrometers as an example, the unit area is 65.61 square micrometers. If the display panel 10 has only the first sub-light-emitting element 210 or only the second sub-light-emitting element 220 in the first color light-emitting element 200a, the second color light-emitting element 200b, and the third color light-emitting element 200c, the area of ​​the corresponding effective light-emitting area is 10.952 square micrometers, that is, c1+c2+c3=10.952 square micrometers, d1+d2+d3=10.952 square micrometers, e1=10.952 square micrometers. Then M=(10.952×3) / 65.61=50.07%.

[0068] Furthermore, the display panel 10 includes a first color light-emitting element 200a, a second color light-emitting element 200b, and a third color light-emitting element 200c, which simultaneously include a first sub-light-emitting element 210 and a second sub-light-emitting element 220. Specifically, taking the first color light-emitting element 200a as an example, the overall projected area of ​​the first anode layer 210c and the second anode layer 220c on the substrate 100 is 15.387 square micrometers. Similarly, taking the effective light-emitting area of ​​the first color light-emitting element 200a as an example, the area of ​​the pixel-defined portion border area in the first color light-emitting element 200a is 4.435 square micrometers. The same applies to the second color light-emitting element 200b and the third color light-emitting element 200c. Therefore, within a unit area, the total occupied area of ​​the pixel-defined portion border area is 4.435 × 3 = 13.305 square micrometers. Therefore, when the display panel 10 includes a first sub-light-emitting element 210 and a second sub-light-emitting element 220, with the first color light-emitting element 200a, the second color light-emitting element 200b, and the third color light-emitting element 200c, the corresponding aperture ratio M = 1 - 13.305 / 65.61 = 79.72%. Thus, the aperture ratio per unit area in the display panel 10 is improved by 79.72% - 50.07% = 29.65%.

[0069] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 5 As shown, the display panel 10 also includes a filler layer 500, which is located on the side of the second sub-light-emitting element 220 away from the substrate 100.

[0070] For details, please refer to Figure 5 As shown, the display panel 10 also includes a filler adhesive layer 500, which can protect the overall structure of the display panel 10 and ensure the stability of the overall structure. Further, refer to... Figure 4 As shown, the second pixel limiting portion 420 covers a portion of the second anode layer 220c, so the covered area is uneven. By placing the filler adhesive layer 500 on the side of the second sub-light-emitting element 220 away from the substrate 100, the overall structure of the display panel 10 can be leveled, ensuring the flatness of the overall structure of the display panel 10 and ensuring the structural stability of the display panel 10.

[0071] Continue to refer to Figure 5 As shown, the display panel 10 also includes a thin film encapsulation layer 600, which includes a first thin film encapsulation layer 610 and a second thin film encapsulation layer 620. The first thin film encapsulation layer 610 is located on the side of the first anode layer 210c away from the substrate 100, and the second thin film encapsulation layer 620 is located on the side of the second cathode layer 220c away from the substrate 100. Along the thickness direction of the substrate 10, the distance from the surface of the first thin film encapsulation layer 610 away from the substrate 100 to the substrate 100 is S1, and the distance from the surface of the electrode connection portion 300 away from the substrate 100 to the substrate 100 is S2, satisfying: S1 = S2, and S1 and S2 are positive numbers.

[0072] Further reference Figure 5 As shown, the display panel 10 also includes a thin-film encapsulation layer 600, which includes a first thin-film encapsulation layer 610. The first thin-film encapsulation layer 610 is located on the side of the first anode layer 210c away from the substrate 100. The first thin-film encapsulation layer 610 can provide structural protection for the first sub-light-emitting element 210. (Reference) Figure 5 As shown, the thin-film encapsulation layer 600 further includes a second thin-film encapsulation layer 620, which is located on the side of the second cathode layer 220c away from the substrate 100. The second thin-film encapsulation layer 620 can provide structural protection for the second sub-light-emitting element 220. Exemplarily, both the first thin-film encapsulation layer 610 and the second thin-film encapsulation layer 620 are multiple film layer structures stacked together, such as inorganic encapsulation layers, organic encapsulation layers, and inorganic encapsulation layers stacked along the thickness direction of the display panel.

[0073] Further reference Figure 5As shown, along the thickness direction of the substrate 10, the distance from the surface of the first thin film encapsulation layer 610 away from the substrate 100 to the substrate 100 is S1, and the distance from the surface of the electrode connection portion 300 away from the substrate 100 to the substrate 100 is S2, satisfying: S1=S2. That is to say, the surface of the first thin film encapsulation layer 610 away from the substrate 100 and the surface of the electrode connection portion 300 away from the substrate 100 are flush, which is beneficial to ensure the flatness of the second anode layer 220c and ensure the overall structural stability of the display panel 10.

[0074] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 6 As shown, the display panel 10 further includes a thin film encapsulation layer 600, which includes a first thin film encapsulation layer 610 and a second thin film encapsulation layer 620. The first thin film encapsulation layer 610 is located on the side of the first anode layer 210c away from the substrate 100, and the second thin film encapsulation layer 620 is located on the side of the second cathode layer 220c away from the substrate 100. Along the thickness direction of the substrate 100, the distance from the surface of the first thin film encapsulation layer 610 away from the substrate 100 to the substrate 100 is S1, and the distance from the surface of the electrode connection portion 300 away from the substrate 100 to the substrate 100 is S2, satisfying: S1 < S2. The pixel limiting portion 400 further includes a third pixel limiting portion 430, which is located on the side of the first thin film encapsulation layer 610 away from the substrate 100. The distance from the surface of the third pixel limiting portion 430 away from the substrate 100 to the substrate 100 is S3, satisfying: S1 + S3 = S2, where S1, S2, and S3 are positive numbers.

[0075] Further reference Figure 5 As shown, along the thickness direction of the substrate 10, the distance from the surface of the first thin film encapsulation layer 610 away from the substrate 100 to the substrate 100 is S1, and the distance from the surface of the electrode connection portion 300 away from the substrate 100 to the substrate 100 is S2, satisfying: S1 < S2, that is, the surface of the first thin film encapsulation layer 610 away from the substrate 100 and the surface of the electrode connection portion 300 away from the substrate 100 are not flush. In order to ensure the flattening of the second anode layer 220c, a third pixel limiting portion 430 is provided on the side of the first thin film encapsulation layer 610 away from the substrate 100.

[0076] Specifically, the distance from the surface of the third pixel limiting portion 430 away from the substrate 100 to the substrate 100 is S3, which satisfies: S1+S3=S2. That is to say, the surface of the third thin film encapsulation layer 630 away from the substrate 100 and the surface of the electrode connection portion 300 away from the substrate 100 are flush, which helps to ensure the flatness of the second anode layer 220c and ensure the overall structural stability of the display panel 10.

[0077] refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the light-emitting element 200 includes a first color light-emitting element 200a, a second color light-emitting element 200b, and a third color light-emitting element 200c. The light emission wavelengths of the first color light-emitting element 200a, the second color light-emitting element 200b, and the third color light-emitting element 200c are different.

[0078] For details, please refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the light-emitting element 200 includes a first-color light-emitting element 200a, a second-color light-emitting element 200b, and a third-color light-emitting element 200c, each emitting light with a different wavelength, thereby achieving a color display effect on the display panel 10. For example, the first-color light-emitting element 200a can be a blue light-emitting element, the second-color light-emitting element 200b can be a green light-emitting element, and the third-color light-emitting element 200c can be a red light-emitting element. The specific emitted light of the first-color light-emitting element 200a, the second-color light-emitting element 200b, and the third-color light-emitting element 200c can be adaptively adjusted according to actual needs; this embodiment of the invention does not impose specific limitations on this.

[0079] refer to Figure 5 and Figure 6As shown, the display panel 10 further includes a filter layer 700, which includes a first filter layer 710, a second filter layer 720, and a third filter layer 730. The first filter layer 710 is located on the side of the second sub-light-emitting element 220 of the first color light-emitting element 200a away from the substrate 100, and the orthogonal projection of the first filter layer 710 onto the substrate 100 covers the orthogonal projection of the first sub-light-emitting element 210 of the first color light-emitting element 200a onto the substrate 100, and the orthogonal projection of the first filter layer 710 onto the substrate 100 covers the orthogonal projection of the second sub-light-emitting element 220 of the first color light-emitting element 200a onto the substrate 100. The second filter layer 720 is located on the side of the second sub-light-emitting element 220 of the second color light-emitting element 200b away from the substrate 100, and the second... The orthogonal projection of the filter layer 720 onto the substrate 100 covers the orthogonal projection of the first sub-light-emitting element 210 of the second color light-emitting element 200b onto the substrate 100, and the orthogonal projection of the second filter layer 720 onto the substrate 100 covers the orthogonal projection of the second sub-light-emitting element 220 of the second color light-emitting element 200b onto the substrate 100; the third filter layer 730 is located on the side of the second sub-light-emitting element 220 of the third color light-emitting element 200c away from the substrate 100, and the orthogonal projection of the third filter layer 730 onto the substrate 100 covers the orthogonal projection of the first sub-light-emitting element 210 of the third color light-emitting element 200c onto the substrate 100, and the orthogonal projection of the third filter layer 730 onto the substrate 100 covers the orthogonal projection of the second sub-light-emitting element 220 of the third color light-emitting element 200c onto the substrate 100.

[0080] Further reference Figure 5 and Figure 6 As shown, the display panel 10 also includes a light filter layer 700. The light filter layer 700 can adjust the light emitted by the light-emitting elements 200, thereby improving the overall display light emission effect of the display panel 10. Specifically, the light-emitting elements 200 include a first color light-emitting element 200a, a second color light-emitting element 200b, and a third color light-emitting element 200c. Therefore, the light filter layer 700 includes a first light filter layer 710, a second light filter layer 720, and a third light filter layer 730. The first light filter layer 710 covers the first color light-emitting element 200a, the second light filter layer 720 covers the second color light-emitting element 200b, and the third light filter layer 730 covers the third color light-emitting element 200c. This allows different light filter layers 700 to adjust the light emitted by different color light-emitting elements 200, ensuring the overall display effect of the display panel 10.

[0081] For details, please refer to Figure 5 and Figure 6As shown, the first filter layer 710 is located on the side of the second sub-light-emitting element 220 of the first color light-emitting element 200a away from the substrate 100. The orthogonal projection of the first filter layer 710 onto the substrate 100 covers the orthogonal projection of the first sub-light-emitting element 210 of the first color light-emitting element 200a onto the substrate 100, and the orthogonal projection of the first filter layer 710 onto the substrate 100 covers the orthogonal projection of the second sub-light-emitting element 220 of the first color light-emitting element 200a onto the substrate 100. In other words, the first filter layer 710 can adjust the light emitted from the first sub-light-emitting element 210 of the first color light-emitting element 200a, and simultaneously, the first filter layer 710 can also adjust the light emitted from the second sub-light-emitting element 220 of the first color light-emitting element 200a. The adjustment methods of the second filter layer 720 and the third filter layer 730 are similar and will not be repeated here.

[0082] Based on the same inventive concept, embodiments of the present invention also provide a method for manufacturing a display panel. Figure 7 This is a schematic flowchart of a display panel manufacturing method provided in an embodiment of the present invention. Figure 8 This is a schematic diagram illustrating the manufacturing process of a display panel according to an embodiment of the present invention. (Refer to...) Figure 7 and Figure 8 As shown, the preparation method includes:

[0083] S110. Provide a substrate and prepare an electrode connection portion on one side of the substrate.

[0084] For details, please refer to Figure 8 As shown in step a, an electrode connection portion 300 is prepared on one side of the substrate 100.

[0085] S120. A first pixel definition portion is prepared on one side of the substrate.

[0086] For details, please refer to Figure 8 As shown in step b, a first pixel defining portion 410 is prepared on one side of the substrate 100. The first pixel defining portion 410 includes a first pixel portion unit 411 and a second pixel portion unit 412, and the heights of the first pixel portion unit 411 and the second pixel portion unit 412 differ. Specifically, the preparation process of the first pixel portion unit 411 and the second pixel portion unit 412 can be as follows:

[0087] Figure 9 This is a schematic diagram of the manufacturing process of another display panel provided in an embodiment of the present invention, for reference. Figure 9 As shown, first refer to Figure 9 As shown in step a, an electrode connection portion 300 is provided on one side of the substrate 100; next, refer to Figure 9As shown in step b, pixel defining structures 20 are filled on one side of the substrate 100 and on both sides of the electrode connection portion 300, and the pixel defining structures 20 are flush with the height of the electrode connection portion 300; then refer to Figure 9 As shown in step c, the pixel-defining structure 20 for the subsequent fabrication of the first pixel unit is etched, but the pixel-defining structure 20 for the subsequent fabrication of the second pixel unit is not etched; (Refer to...) Figure 9 As shown in step d, a first photoresist 31 is disposed on the side away from the substrate 100 where the first pixel unit will be subsequently fabricated, and a second photoresist 32 is disposed on the side away from the substrate 100 where the second pixel unit will be subsequently fabricated; (Refer to...) Figure 9 As shown in step e, further patterning etching is performed to remove the pixel-defined structure 20 covering the photoresist area. Finally, the first photoresist 31 and the second photoresist 32 are removed to prepare the first pixel distribution unit 411 and the second pixel distribution unit 412.

[0088] S130. A first sub-light-emitting element is prepared on one side of the substrate. The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer and a first anode layer.

[0089] For details, please refer to Figure 8As shown in step c, a first sub-light-emitting element 210 is fabricated on one side of the substrate 100. The first sub-light-emitting element 210 includes a first cathode layer 210a, a first light-emitting layer 210b, and a first anode layer 210c stacked together, wherein the first light-emitting layer 210b is located between the first cathode layer 210a and the first anode layer 210c. Exemplarily, the first light-emitting layer 210b may include multiple film layer structures, such as a hole injection layer (HIL), a hole transport layer (HTL), a prime layer, an emitting layer (EML), a hole block layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL). The embodiments of the present invention do not specifically limit the specific film layer configuration in the first light-emitting layer 210b and can make adaptive adjustments according to actual needs. Furthermore, the light-emitting principle of the first sub-light-emitting element 210 can be understood as follows: a certain voltage is applied to the first cathode layer 210a and the first anode layer 210c respectively, and holes from the first anode layer 210c and electrons from the first cathode layer 210a form excitons at the light-emitting film layer in the first light-emitting layer 210b. The excitons excite the light-emitting molecules in the light-emitting film layer to emit light, thereby realizing the display effect of the display panel.

[0090] S140. A second sub-light-emitting element is formed on the side of the electrode connection portion away from the substrate. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. A second pixel defining portion is formed between two adjacent second anode layers.

[0091] Further reference Figure 8As shown in step d, a second sub-light-emitting element 220 is fabricated on the surface of the electrode connection portion 300 away from the substrate 100. The second sub-light-emitting element 220 includes a second anode layer 220c, a second light-emitting layer 220b, and a second cathode layer 220a stacked together. The second light-emitting layer 220b may also include multiple film layer structures, such as a hole injection layer (HIL), a hole transport layer (HTL), a prime layer, an emitting layer (EML), a hole block layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL). The specific film layer configuration in the second light-emitting layer 220b is not specifically limited in this embodiment and can be adaptively adjusted according to actual needs. The light-emitting principle of the second sub-light-emitting element 220 is the same as described above and will not be repeated here.

[0092] The substrate 100 includes multiple light-emitting elements 200 on one side. By driving these multiple light-emitting elements 200 to emit light, the display panel can achieve its display function. Specifically, the display panel includes multiple circuit structures (not specifically shown in the figure) disposed between the substrate 100 and the light-emitting elements 200. These circuit structures drive the light-emitting elements 200 to emit light. Furthermore, the multiple light-emitting elements 200 disposed on the substrate 100 can include light-emitting elements of different colors, thereby achieving a color display effect for the display panel. Further, each light-emitting element 200 includes a first sub-light-emitting element 210 and a second sub-light-emitting element 220, wherein the first sub-light-emitting element 210 is located on the side of the second sub-light-emitting element 220 closer to the substrate 100. Specifically, the first sub-light-emitting element 210 and the second sub-light-emitting element 220 are located at different film layers of the display panel 10.

[0093] Specifically, in the first sub-light-emitting element 210, the first anode layer 210c is closer to the second sub-light-emitting element 210 than the first cathode layer 210a and the first light-emitting layer 210b. Similarly, in the second sub-light-emitting element 220, the second anode layer 220c is closer to the first sub-light-emitting element 210 than the second cathode layer 220a and the second light-emitting layer 220b. This can also be understood as the cathode and anode layers in the first and second sub-light-emitting elements 210 and 220 being positioned opposite each other. This facilitates connecting the first anode layer 210c and the second anode layer 220c, effectively connecting the first and second sub-light-emitting elements 210 and 220 together, allowing them to emit light. In other words, when the light-emitting element 200 includes only the first sub-light-emitting element 210 or only the second sub-light-emitting element 220, the effective light-emitting area of ​​the light-emitting element 200 is the light-emitting area provided by the first sub-light-emitting element 210 or the effective light-emitting area of ​​the light-emitting element 200 is the light-emitting area provided by the second sub-light-emitting element 220. However, when the light-emitting element 200 includes both the first sub-light-emitting element 210 and the second sub-light-emitting element 220, and the first and second sub-light-emitting elements 210 and 220 are connected, the effective light-emitting area of ​​the light-emitting element 200 is the sum of the light-emitting areas provided by the first sub-light-emitting element 210 and the second sub-light-emitting element 220, thereby increasing the effective light-emitting area of ​​the light-emitting element 200 in the display panel 10. Therefore, by adding the second sub-light-emitting element 220, the display effect of the light-emitting element 200 in the display panel can be improved. It should be noted that the display panel includes multiple light-emitting elements of different colors, and the first sub-light-emitting element 210 and the second sub-light-emitting element 220 used for connection are light-emitting elements 200 that emit light of the same color.

[0094] Furthermore, the electrode connection portion 300 is used to connect the first anode layer 210c and the second anode layer 220c, which are disposed in different layers, so that the first sub-light-emitting element 210 and the second sub-light-emitting element 220 can emit the same light simultaneously, thereby increasing the effective light-emitting area of ​​the corresponding light-emitting element 200. The electrode connection portion 300 is located on one side of the substrate 100, and the first anode layer 210c is electrically connected to the first electrode connection portion 300. The second anode layer 220c is located on the side of the electrode connection portion 300 away from the substrate 100, and the second anode layer 220c is electrically connected to the electrode connection portion 300. The first anode layer 210c is electrically connected to the second anode layer 220c through the electrode connection portion 300. The electrode connection portion 300 can be made of tungsten or other conductive metal materials; this embodiment of the invention does not impose specific limitations on this.

[0095] The first pixel defining portion 410 is located on one side of the substrate 100 and between two adjacent first cathode layers 210a. This prevents short circuits between the first cathode layers 210a of different first sub-light-emitting elements 210, ensuring the light-emitting stability of different first sub-light-emitting elements 210 and guaranteeing the overall display effect of the display panel 10. The second pixel defining portion 420 is disposed on the same layer as the second anode layer 220c and between two adjacent second anode layers 220c. This prevents short circuits between the second anode layers 220c of different second sub-light-emitting elements 220, ensuring the light-emitting stability of different second sub-light-emitting elements 220 and guaranteeing the overall display effect of the display panel.

[0096] Furthermore, since the material of the pixel-limiting portion 400 does not obstruct light, the second pixel-limiting portion 420 disposed on the side of the first sub-light-emitting element 210 away from the substrate 100 will not obstruct the emitted light from the first sub-light-emitting element 210, thus ensuring the light emission effect of the first sub-light-emitting element 210. Specifically, the orthographic projection of the first pixel-limiting portion 410 onto the substrate 100 at least partially overlaps with the orthographic projection of the second anode layer 220c onto the substrate 100, and the orthographic projection of the second pixel-limiting portion 420 onto the substrate 100 at least partially overlaps with the orthographic projection of the first anode layer 210c onto the substrate 100. This can also be understood as follows: the orthographic projection of the effective light-emitting area of ​​the first sub-light-emitting element 210 (the light-emitting area of ​​the first sub-light-emitting element 210 defined by the first pixel definition portion 410) onto the substrate 100 is misaligned with the orthographic projection of the effective light-emitting area of ​​the second sub-light-emitting element 220 (the light-emitting area of ​​the second sub-light-emitting element 220 defined by the second pixel definition portion 420) onto the substrate 100. Therefore, when the light-emitting element 200 includes the first sub-light-emitting element 210 and the second sub-light-emitting element 220, the overall effective light-emitting area can be increased, the light-emitting effect of the light-emitting element 200 can be improved, and the overall display effect of the display panel can be guaranteed.

[0097] In summary, this invention provides a method for manufacturing a display panel. The light-emitting elements disposed in the display panel include a first sub-light-emitting element and a second sub-light-emitting element. The first sub-light-emitting element is located on the side of the second sub-light-emitting element closer to the substrate. The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. The display panel also includes an electrode connection portion, with the first anode layer located on the side of the electrode connection portion away from the substrate, and the first anode layer electrically connected to the second anode layer through the electrode connection portion. The display panel also includes a pixel defining portion, with the first pixel defining portion located on one side of the substrate and between two adjacent first cathode layers, and the second pixel defining portion located between two adjacent second anode layers. The orthographic projection of the first pixel defining portion onto the substrate overlaps with the orthographic projection of the second anode layer onto the substrate, and the orthographic projection of the second pixel defining portion onto the substrate overlaps with the orthographic projection of the first anode layer onto the substrate. By adjusting the display panel to simultaneously include a first sub-light-emitting element and a second sub-light-emitting element, and adjusting the relative positions of the first and second sub-light-emitting elements, the effective light-emitting area of ​​the light-emitting elements in the display panel can be increased, thereby improving the display brightness and display effect of the display panel.

[0098] Based on the same inventive concept, embodiments of the present invention also provide a display device. Figure 10 This is a schematic diagram of a display device according to an embodiment of the present invention. The display device includes any of the display panels provided in the above embodiments. For example, refer to... Figure 10 The display device 1 includes a display panel 10. Therefore, the display device also has the beneficial effects of the display panel in the above embodiments. The similarities can be understood with reference to the explanation of the display panel above, and will not be repeated below.

[0099] The display device 1 provided in this embodiment of the invention can be any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle display, industrial control equipment, medical display screen, touch interactive terminal, etc. This embodiment of the invention does not make any special limitation in this regard.

[0100] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A display panel, characterized in that, It includes a substrate and a plurality of light-emitting elements located on one side of the substrate; The light-emitting element includes a first sub-light-emitting element and a second sub-light-emitting element, wherein the first sub-light-emitting element is located on the side of the second sub-light-emitting element closer to the substrate; The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The first cathode layer is located on one side of the substrate, the first light-emitting layer is located on the side of the first cathode layer away from the substrate, and the first anode layer is located on the side of the first light-emitting layer away from the first cathode layer. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. The second anode layer is located on the side of the first anode layer away from the substrate, the second light-emitting layer is located on the side of the second anode layer away from the first anode layer, and the second cathode layer is located on the side of the second light-emitting layer away from the second anode layer. The display panel further includes an electrode connection portion located on one side of the substrate, and the second anode layer located on the side of the electrode connection portion away from the substrate. The first anode layer is electrically connected to the second anode layer through the electrode connection portion. The display panel further includes a pixel defining portion, which includes a first pixel defining portion and a second pixel defining portion. The first pixel defining portion is located on one side of the substrate and between two adjacent first cathode layers. The second pixel defining portion is disposed on the same layer as the second anode layer and between two adjacent second anode layers. Wherein, the orthographic projection of the first pixel defined portion onto the substrate and the orthographic projection of the second anode layer onto the substrate at least partially overlap, and the orthographic projection of the second pixel defined portion onto the substrate and the orthographic projection of the first anode layer onto the substrate at least partially overlap.

2. The display panel according to claim 1, characterized in that, The first pixel-defined portion includes a first pixel portion unit and a second pixel portion unit; Along the first direction, the first pixel division unit and the second pixel division unit are located on both sides of the first cathode layer, the first pixel division unit is located on the side of the second pixel division unit closer to the electrode connection portion, and the orthographic projection of the first light-emitting layer on the substrate and the orthographic projection of the first pixel division unit on the substrate at least partially overlap, and the orthographic projection of the first light-emitting layer on the substrate and the orthographic projection of the second pixel division unit on the substrate at least do not overlap. Wherein, along the thickness direction of the substrate, the height of the electrode connection portion is H1, the height of the first pixel subunit is H2, and the height of the second pixel subunit is H3, satisfying: H1=H3, H2<H3, H1, H2 and H3 are positive numbers, and the first direction is parallel to the plane where the substrate is located.

3. The display panel according to claim 1, characterized in that, The orthographic projection of the second pixel portion onto the substrate at least partially overlaps with the orthographic projection of the second anode layer onto the substrate.

4. The display panel according to claim 1, characterized in that, The display panel further includes a filler layer located on the side of the second sub-light-emitting element away from the substrate.

5. The display panel according to claim 1, characterized in that, The display panel further includes a thin-film encapsulation layer, which includes a first thin-film encapsulation layer and a second thin-film encapsulation layer. The first thin-film encapsulation layer is located on the side of the first anode layer away from the substrate, and the second thin-film encapsulation layer is located on the side of the second cathode layer away from the substrate. Wherein, along the thickness direction of the substrate, the distance from the surface of the first thin film encapsulation layer away from the substrate to the substrate is S1, and the distance from the surface of the electrode connection portion away from the substrate to the substrate is S2, satisfying: S1 = S2, and S1 and S2 are positive numbers.

6. The display panel according to claim 1, characterized in that, The display panel further includes a thin-film encapsulation layer, which includes a first thin-film encapsulation layer and a second thin-film encapsulation layer. The first thin-film encapsulation layer is located on the side of the first anode layer away from the substrate, and the second thin-film encapsulation layer is located on the side of the second cathode layer away from the substrate. Wherein, along the thickness direction of the substrate, the distance from the surface of the first thin film encapsulation layer away from the substrate to the substrate is S1, and the distance from the surface of the electrode connection portion away from the substrate to the substrate is S2, satisfying: S1 < S2. The pixel defining portion further includes a third pixel defining portion, which is located on the side of the first thin film encapsulation layer away from the substrate. The distance from the surface of the third pixel defining portion away from the substrate to the substrate is S3, satisfying: S1+S3=S2, where S1, S2 and S3 are positive numbers.

7. The display panel according to claim 1, characterized in that, The light-emitting element includes a first color light-emitting element, a second color light-emitting element, and a third color light-emitting element, wherein the light emission wavelengths of the first color light-emitting element, the second color light-emitting element, and the third color light-emitting element are different.

8. The display panel according to claim 7, characterized in that, The display panel further includes a filter layer, which includes a first filter layer, a second filter layer, and a third filter layer; The first filter layer is located on the side of the second sub-emitting element of the first color light-emitting element away from the substrate, and the orthogonal projection of the first filter layer onto the substrate covers the orthogonal projection of the first sub-emitting element of the first color light-emitting element onto the substrate, and the orthogonal projection of the first filter layer onto the substrate covers the orthogonal projection of the second sub-emitting element of the first color light-emitting element onto the substrate. The second filter layer is located on the side of the second sub-light-emitting element of the second color light-emitting element away from the substrate, and the orthogonal projection of the second filter layer onto the substrate covers the orthogonal projection of the first sub-light-emitting element of the second color light-emitting element onto the substrate. The third filter layer is located on the side of the second sub-emitting element of the third color light-emitting element away from the substrate, and the orthogonal projection of the third filter layer onto the substrate covers the orthogonal projection of the first sub-emitting element of the third color light-emitting element onto the substrate, and the orthogonal projection of the third filter layer onto the substrate covers the orthogonal projection of the second sub-emitting element of the third color light-emitting element onto the substrate.

9. A method for manufacturing a display panel, used to manufacture the display panel according to any one of claims 1-8, characterized in that, The preparation method includes: A substrate is provided, and an electrode connection portion is formed on one side of the substrate; A first pixel definition portion is formed on one side of the substrate; A first sub-light-emitting element is fabricated on one side of the substrate. The first sub-light-emitting element includes a first cathode layer, a first light-emitting layer, and a first anode layer. The first cathode layer is located on one side of the substrate, the first light-emitting layer is located on the side of the first cathode layer away from the substrate, and the first anode layer is located on the side of the first light-emitting layer away from the first cathode layer. A second sub-light-emitting element is formed on the side of the electrode connection portion away from the substrate. The second sub-light-emitting element includes a second anode layer, a second light-emitting layer, and a second cathode layer. A second pixel-defining portion is formed between two adjacent second anode layers. The second anode layer is located on the side of the first anode layer away from the substrate, the second light-emitting layer is located on the side of the second anode layer away from the first anode layer, and the second cathode layer is located on the side of the second light-emitting layer away from the second anode layer. The second anode layer is located on the side of the electrode connection portion away from the substrate, and the first anode layer is electrically connected to the second anode layer through the electrode connection portion. The second pixel-defining portion is disposed on the same layer as the second anode layer, wherein the orthographic projection of the first pixel-defining portion onto the substrate at least partially overlaps with the orthographic projection of the second anode layer onto the substrate.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-8.

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