Display panel, preparation method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a preparation method thereof and a display device, the display panel comprises a driving substrate and a plurality of light-emitting elements located on one side of the driving substrate, and different light-emitting elements have different light emitting colors; the light-emitting element comprises a first electrode, the first electrode comprises a reflecting electrode, and at least part of the first electrode further comprises at least one layer of auxiliary electrode; the reflection electrode is electrically connected with a driving circuit in the driving substrate, and the auxiliary electrode is located on the side, away from the driving substrate, of the reflection electrode; and the thicknesses of the auxiliary electrodes in the light-emitting elements with different light-emitting colors are different. By adopting the technical scheme provided by the embodiment of the invention, the thicknesses of the auxiliary electrodes in the light-emitting elements with different colors are set to be different, so that the light-emitting effects of the light-emitting elements with different colors are adjusted, and the overall display effect of the display panel is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] With the continuous development of display technology, display panels have been widely used in people's production and life. In order to better meet people's needs, the display panel can be adjusted, for example, some film layers in the display panel can be adjusted to improve the overall effect of the display panel. Summary of the invention

[0003] The embodiments of the present invention provide a display panel and a method for manufacturing the same, and a display device. By adjusting the thickness of auxiliary electrodes in light-emitting elements of different colors, the light-emitting effects of light-emitting elements of different colors are adjusted, thereby improving the overall display effect of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, comprising a driving substrate and a plurality of light-emitting elements located on one side of the driving substrate, wherein different light-emitting elements have different light-emitting colors;

[0005] The light-emitting element includes a first electrode, the first electrode includes a reflective electrode, and at least part of the first electrode also includes at least one layer of auxiliary electrode; the reflective electrode is electrically connected to the driving circuit in the driving substrate, and the auxiliary electrode is located on a side of the reflective electrode away from the driving substrate; and the thickness of the auxiliary electrode in the light-emitting elements with different light output colors is different.

[0006] In a second aspect, an embodiment of the present invention provides a method for manufacturing a display panel, wherein the display panel includes a plurality of light-emitting elements, and different light-emitting elements have different light-emitting colors;

[0007] The preparation method comprises:

[0008] preparing a driving substrate;

[0009] A first electrode is prepared on one side of the driving substrate, the first electrode includes a reflective electrode, and at least part of the first electrode also includes at least one layer of auxiliary electrode; the reflective electrode is electrically connected to the driving substrate, and the auxiliary electrode is located on a side of the reflective electrode away from the driving substrate; and the thickness of the auxiliary electrode is different in the light-emitting elements with different light output colors.

[0010] In a third aspect, an embodiment of the present invention provides a display device, comprising the display panel described in the first aspect.

[0011] An embodiment of the present invention provides a display panel, which includes a plurality of light-emitting elements located on one side of a driving substrate, and the driving substrate realizes the display function of the display panel by driving the light-emitting elements to perform light-emitting display; further, the light-emitting elements include a first electrode, and the thicknesses of the first electrodes of light-emitting elements of different colors may be different, and the light emitting effects of the light-emitting elements of different colors can be adjusted by adjusting the thickness of the first electrode, thereby ensuring the overall display balance of the display panel; specifically, among the plurality of light-emitting elements, at least some of the first electrodes include auxiliary electrodes, and the thickness of the first electrode can be adjusted by adjusting the thickness of the auxiliary electrodes of the light-emitting elements of different colors, thereby achieving the adjustment of the light emitting effects of the light-emitting elements of different colors and ensuring the display effect of the display panel.

[0012] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required to describe the embodiments. Obviously, the drawings introduced are only drawings of a part of the embodiments to be described in the present invention, rather than all the drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of a display panel provided by the prior art;

[0015] Figure 2 is a structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0016] Figure 3 yes Figure 2 A schematic diagram of a first cross section along the section line A-A';

[0017] Figure 4 yes Figure 2 A second cross-sectional schematic diagram along the section line A-A';

[0018] Figure 5 yes Figure 2 A third cross-sectional diagram along the section line A-A';

[0019] Figure 6 yes Figure 2 A fourth cross-sectional schematic diagram along the section line A-A';

[0020] Figure 7 yes Figure 2A fifth cross-sectional schematic diagram along the section line A-A';

[0021] Figure 8 yes Figure 3 An enlarged schematic diagram of a light emitting element;

[0022] Fig. 9 yes Figure 3 An enlarged schematic diagram of another light-emitting element;

[0023] Fig.10 is a schematic structural diagram of a first light-emitting element provided by an embodiment of the present invention;

[0024] Fig.11 is a schematic structural diagram of a second light-emitting element provided by an embodiment of the present invention;

[0025] Fig.12 is a flow chart of a first method for preparing a display panel provided by an embodiment of the present invention;

[0026] Fig.13 is a flow chart of a second method for preparing a display panel provided by an embodiment of the present invention;

[0027] Fig.14 is a flow chart of a third method for preparing a display panel provided by an embodiment of the present invention;

[0028] Fig.15 is a schematic diagram of a process for preparing a first display panel provided by an embodiment of the present invention;

[0029] Fig.16 is a flow chart of a fourth method for preparing a display panel provided by an embodiment of the present invention;

[0030] Fig.17 is a schematic diagram of a process for preparing a second display panel provided by an embodiment of the present invention;

[0031] Fig.18 is a flow chart of a fifth method for preparing a display panel provided by an embodiment of the present invention;

[0032] Fig.19 is a schematic diagram of a process for preparing a third display panel provided by an embodiment of the present invention;

[0033] Fig. 20 is a flow chart of a sixth method for preparing a display panel provided by an embodiment of the present invention;

[0034] Fig.21 is a schematic diagram of a seventh process for preparing a display panel provided by an embodiment of the present invention;

[0035] Fig. 22is a flow chart of a seventh method for preparing a display panel provided by an embodiment of the present invention;

[0036] Fig.23 is a schematic diagram of a process for preparing an eighth display panel provided by an embodiment of the present invention;

[0037] Fig.24 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a system, product or device comprising a series of units is not necessarily limited to those steps or units clearly listed, but may include other units that are not clearly listed or inherent to these products or devices.

[0040] Figure 1 is a schematic diagram of the structure of a display panel provided by the prior art, such as Figure 1As shown, the display panel 10' includes a driving substrate 100' and a plurality of light-emitting elements 200' located on one side of the driving substrate 100', wherein the light-emitting elements 200' include light-emitting elements 200' of different colors, such as a first color light-emitting element 201', a second color light-emitting element 202' and a third color light-emitting element 203', and the light-emitting wavelengths of the light-emitting elements 200' of different colors are different. Part of the light generated in the light-emitting element 200' will be emitted at the second electrode 230', while the other part of the light will be reflected back to the first electrode 210' at the second electrode 230'. In this way, after multiple reflections of the light, light of a specific wavelength will produce constructive interference, thereby increasing the intensity of the light, while the remaining wavelengths will disappear due to destructive interference. Since the wavelengths of the emitted light from the first color light emitting element 201', the second color light emitting element 202' and the third color light emitting element 203' are different, the overall light emitting effect caused by the reflection of light of different wavelengths in the first electrode 210' and the third electrode 230' is different, which affects the overall display uniformity of the display panel 10'.

[0041] Based on the above technical problems, an embodiment of the present invention provides a display panel, which includes a plurality of light-emitting elements located on one side of a driving substrate, and the driving substrate realizes the display function of the display panel by driving the light-emitting elements to perform light-emitting display; further, the light-emitting elements include a first electrode, and the thicknesses of the first electrodes of light-emitting elements of different colors may be different, and the thickness of the first electrode is adjusted to achieve the light emission effects of the light-emitting elements of different colors, thereby ensuring the overall display balance of the display panel; specifically, among the plurality of light-emitting elements, at least some of the first electrodes also include auxiliary electrodes, and the thickness of the first electrode can be adjusted by adjusting the thickness of the auxiliary electrodes of the light-emitting elements of different colors, thereby achieving the light emission effects of the light-emitting elements of different colors, thereby ensuring the display effect of the display panel.

[0042] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Figure 2 is a schematic structural diagram of a display panel provided by an embodiment of the present invention, Figure 3 yes Figure 2 The first cross-sectional diagram along the section line A-A' is shown in FIG. Figure 4 yes Figure 2 The second cross-sectional diagram along the section line A-A' is shown in FIG. Figure 5 yes Figure 2 The third cross-sectional diagram along the section line A-A', refer to Figures 2 to 5 As shown, an embodiment of the present invention provides a display panel 10, which includes a driving substrate 100 and a plurality of light-emitting elements 200 located on one side of the driving substrate 100, and different light-emitting elements 200 have different light-emitting colors; the light-emitting element 200 includes a first electrode 210, the first electrode 210 includes a reflective electrode 211, and at least part of the first electrode 211 also includes at least one layer of auxiliary electrode 212; the reflective electrode 211 is electrically connected to the driving circuit 110 in the driving substrate 100, and the auxiliary electrode 212 is located on a side of the reflective electrode 211 away from the driving substrate 100; and the thickness of the auxiliary electrode 212 in the light-emitting elements 200 with different light-emitting colors is different.

[0044] Among them, reference Figures 2 to 5 As shown, the display panel 10 includes a driving substrate 100 and a plurality of light-emitting elements 200 located on one side of the driving substrate 100. The driving substrate 100 includes a driving circuit 110, and the driving circuit 110 is electrically connected to the light-emitting element 200. The driving circuit 110 can provide a driving current for the light-emitting element 200, thereby driving the light-emitting element 200 to perform light-emitting display, thereby realizing the display function of the display panel 10. Further, the driving circuit 110 in the driving substrate 100 may include a transistor, and the transistor may include an active layer 111, a gate 112, a source 113, and a drain 114. In addition, the setting mode of the driving circuit 110 is diverse, for example, it may be "7T1C", "8T2C", etc., where "T" represents a transistor and "C" represents a capacitor. The specific setting mode of the driving circuit 110 in the driving substrate 100 can be adaptively adjusted according to different display panels 10, and the embodiment of the present invention does not specifically limit this.

[0045] For further reference, Figures 3 to 5 As shown, the driving substrate 100 may include a substrate 101, a gate insulating layer 102, a first interlayer insulating layer 103, a second interlayer insulating layer 104 and a planarizing layer 105, etc. The gate insulating layer 102, the first interlayer insulating layer 103, the second interlayer insulating layer 104 and the planarizing layer 105 may be arranged between two adjacent metal layers to play a role in signal isolation and planarization.

[0046] Furthermore, the light emitting element 200 may include light emitting elements of different colors, such as a red light emitting element, a blue light emitting element, and a green light emitting element, etc. By arranging light emitting elements 200 of different colors, a color display effect of the display panel 10 can be achieved. There are also various arrangements of the light emitting elements 200 of different colors in the display panel 10, which will not be described one by one in the embodiments of the present invention.

[0047] Specifically, refer to Figures 3 to 5As shown, the light-emitting element 200 includes a first electrode 210, and the light-emitting element 200 is electrically connected to the driving circuit 110 through the first electrode 210. In other words, the driving current provided by the driving circuit 110 is transmitted to the light-emitting element 200 through the first electrode 210. Further, the light-emitting element 200 also includes a light-emitting layer 220 and a second electrode 230, and the light-emitting layer 220 is located between the first electrode 210 and the second electrode 220. Among them, the light-emitting principle of the light-emitting element 200 can be understood as: a certain electrical signal is applied to the first electrode 210 and the second electrode 230 respectively, and the holes from the first electrode 210 and the electrons from the second electrode 230 are gathered in the light-emitting layer 220, and are further excited in the light-emitting layer 220 to emit light, thereby realizing the light-emitting of the light-emitting element 200.

[0048] For further reference, Figures 3 to 5 As shown, the first electrode 210 includes a reflective electrode 211, and the second electrode 230 can be a semi-transmissive and semi-reflective electrode. The light emitted by the light-emitting layer can be reflected multiple times in the microcavity formed by the reflective electrode 211 and the second electrode 230, and the light of a specific wavelength will produce constructive interference, thereby enhancing the light intensity. Among them, constructive interference occurs when the distance between the first electrode 210 and the second electrode 230 is an integer multiple of the wavelength of the transmitted light, and the relationship is as follows:

[0049] d=n*(λ / 2)

[0050] Here, d represents the distance between the reflective electrode 211 and the second electrode 230 .

[0051] It can be seen from the above relationship that in order to ensure constructive interference, it is necessary to ensure that the distance between the reflective electrode 211 and the second electrode 230 satisfies an integer multiple of the wavelength, that is, the distance between the reflective electrode 211 and the second electrode 230 is required to be large in the light-emitting element with a large light-emitting wavelength. Therefore, in an embodiment of the present invention, the distance between the reflective electrode 211 and the second electrode 230 is adjusted by adjusting the thickness of the auxiliary electrode. Specifically, by setting the thickness of the auxiliary electrode to be different in the light-emitting elements with different light-emitting colors, specifically, in the light-emitting element with a larger light-emitting wavelength, the thickness of the auxiliary electrode is larger, and in the light-emitting element with a smaller light-emitting wavelength, the thickness of the auxiliary electrode is smaller. By adjusting the thickness of the auxiliary electrode, the cavity length of the microcavity effect is adjusted to ensure that light of different colors can constructively interfere in the microcavity, thereby improving the light intensity.

[0052] For further reference, Figures 3 to 5 As shown, at least part of the first electrode 211 further includes an auxiliary electrode 212, and the thickness of the auxiliary electrode 212 in the light emitting elements 200 of different colors can be set differently. Figures 3 to 5As shown, the first electrode 210 in the light-emitting element 200A may not be provided with an auxiliary electrode 212, and the first electrode 210 in the light-emitting element 200B and the first electrode 210 in the light-emitting element 200C may both be provided with an auxiliary electrode 212, and the thickness of the auxiliary electrode 212 in the light-emitting element 200B may be less than the thickness of the auxiliary electrode 212 in the light-emitting element 200C. By providing the auxiliary electrode 212 and adjusting the thickness of the auxiliary electrode 212 between the light-emitting elements 200 of different colors to be different, the gap between the reflective electrode 211 and the second electrode 230 in the light-emitting elements 200 of different colors is achieved. Exemplarily, if the wavelength of the red light-emitting element is greater than that of the green light-emitting element, the thickness of the auxiliary electrode 212 in the red light-emitting element may be adjusted to be greater than that of the auxiliary electrode 212 in the green light-emitting element; if the wavelength of the green light-emitting element is greater than that of the blue light-emitting element, the thickness of the auxiliary electrode 212 in the green light-emitting element may be adjusted to be greater than that of the auxiliary electrode 212 in the blue light-emitting element.

[0053] In summary, the display panel provided by the embodiment of the present invention includes a plurality of light-emitting elements of different colors, and the thicknesses of the auxiliary electrodes in the light-emitting elements of different colors are different. The microcavity length of the microcavity effect in the different light-emitting elements is adjusted by adjusting the thicknesses of the auxiliary electrodes, thereby achieving enhanced light intensity of the light-emitting elements of different colors and ensuring the display effect of the display panel.

[0054] Continue to refer Figures 3 to 5 As shown, the light-emitting element 200 with different light-emitting colors includes a first light-emitting element and a second light-emitting element; the first light-emitting element includes a red light-emitting element or a green light-emitting element, and the second light-emitting element includes a blue light-emitting element; or, the first light-emitting element includes a red light-emitting element, and the second light-emitting element includes a green light-emitting element or a blue light-emitting element; the number of layers of the auxiliary electrode 212 in the first light-emitting element is greater than the number of layers of the auxiliary electrode 212 in the second light-emitting element.

[0055] Furthermore, in the light-emitting elements 200 of different colors, different thickness settings of the auxiliary electrodes 212 in the light-emitting elements 200 of different colors can be achieved by setting different numbers of layers of auxiliary electrodes 212. Specifically, the light-emitting element 200 includes a first light-emitting element and a second light-emitting element, and the light-emitting color of the first light-emitting element is different from the light-emitting color of the second light-emitting element. According to the above-mentioned microcavity effect, the thickness of the auxiliary electrode 212 can be adjusted in combination with the light-emitting color.

[0056] The wavelength of red light is greater than that of green light, and the wavelength of green light is greater than that of blue light. When the first light-emitting element is a red light-emitting element or a green light-emitting element, and the second light-emitting element is a blue light-emitting element, the number of layers of the auxiliary electrode 212 in the first light-emitting element can be adjusted to be greater than the number of layers of the auxiliary electrode 212 in the second light-emitting element. Alternatively, when the first light-emitting element is a red light-emitting element, and the second light-emitting element is a green light-emitting element or a blue light-emitting element, the number of layers of the auxiliary electrode 212 in the first light-emitting element can be adjusted to be greater than the number of layers of the auxiliary electrode 212 in the second light-emitting element.

[0057] Exemplary, reference Figures 3 to 5 As shown, the light-emitting element 200 includes a light-emitting element 200A, a light-emitting element 200B and a light-emitting element 200C, wherein the light-emitting element 200A, the light-emitting element 200B and the light-emitting element 200C emit light of different colors respectively. The light-emitting element 200A can be understood as a blue light-emitting element, the light-emitting element 200B can be understood as a green light-emitting element, and the light-emitting element 200C can be understood as a red light-emitting element. The number of layers of the auxiliary electrode 212 in the light-emitting element 200C is two layers, the number of layers of the auxiliary electrode 212 in the light-emitting element 200B is one layer, and the auxiliary electrode 212 is not set in the light-emitting element 200A, reflecting that the number of layers of the auxiliary electrode 212 in the light-emitting elements 200 of different colors are set differently. Among them, compared with the light-emitting element 200A and the light-emitting element 200B, the light-emitting element 200A can be considered as the second light-emitting element, and the light-emitting element 200B can be considered as the first light-emitting element; compared with the light-emitting element 200A and the light-emitting element 200C, the light-emitting element 200A can be considered as the second light-emitting element, and the light-emitting element 200C can be considered as the first light-emitting element; compared with the light-emitting element 200B and the light-emitting element 200C, the light-emitting element 200B can be considered as the second light-emitting element, and the light-emitting element 200C can be considered as the first light-emitting element.

[0058] In general, in the display panel 10, the number of layers of the auxiliary electrode 212 in the first electrode 210 can be adaptively adjusted according to the specific light emission colors of different light-emitting elements 200, thereby ensuring that the cavity length of the microcavity effect in different light-emitting elements matches their light emission wavelength, ensuring that the light emission enhancement effect can be obtained, and ensuring the overall display effect of the display panel 10.

[0059] It should be noted that Figure 3-Figure 5The arrangement of the auxiliary electrodes in light-emitting elements of different light-emitting colors is shown in only one possible arrangement, and the embodiment of the present invention does not limit the specific thickness / specific number of layers of the auxiliary electrodes in light-emitting elements of different light-emitting colors. For example, an auxiliary electrode can also be arranged in the light-emitting element 200A, and the number of layers of the auxiliary electrode can be one layer, two layers or more layers. It is only necessary to ensure that the thickness / number of layers of the auxiliary electrode in the light-emitting element with a larger light-emitting wavelength is greater than that of the light-emitting element with a larger light-emitting wavelength, or it is only necessary to ensure that the thickness / number of layers of the auxiliary electrode in the red light-emitting element is greater than that of the green light-emitting element, and the thickness / number of layers of the auxiliary electrode in the green light-emitting element is greater than that of the blue light-emitting element. In addition, the thickness / number of layers of the auxiliary electrodes in different light-emitting elements can be set according to the required cavity length of their microcavity effect.

[0060] Continue to refer Figure 3 As shown, the light-emitting element 200 having an auxiliary electrode 212 includes a seventh light-emitting element and an eighth light-emitting element; the thickness of the auxiliary electrode 212 in the seventh light-emitting element is D1, and the thickness of the auxiliary electrode 212 in the eighth light-emitting element is D2; wherein, (n+1) / n≤D1 / D2≤(n+1) / 1; n is a positive number.

[0061] The light emitting element 200 includes a seventh light emitting element and an eighth light emitting element. The seventh light emitting element and the eighth light emitting element are both provided with an auxiliary electrode 212. Figure 3 As shown, the seventh light emitting element and the eighth light emitting element can refer to Figure 3 The light-emitting element 200B and the light-emitting element 200C. Among them, the light-emitting wavelength color of the seventh light-emitting element is different from the light-emitting wavelength of the eighth light-emitting element, that is, the light-emitting color of the seventh light-emitting element is different from the light-emitting color of the eighth light-emitting element. Furthermore, the thickness of the auxiliary electrode 212 in the seventh light-emitting element may be different from the thickness of the auxiliary electrode 212 in the eighth light-emitting element. The difference in the thickness of the auxiliary electrode 212 is used to adjust the cavity length required for the light-emitting wavelength, meet the microcavity effect, and enhance the light-emitting effect of the light-emitting element 200.

[0062] Specifically, the thickness of the auxiliary electrode 212 in the seventh light-emitting element is D1, and the thickness of the auxiliary electrode 212 in the eighth light-emitting element is D2, which satisfies: (n+1) / n≤D1 / D2≤(n+1) / 1. Since n is a positive number, it can be understood that D1>D2, that is, the thickness of the auxiliary electrode 212 in the seventh light-emitting element is greater than the thickness of the auxiliary electrode 212 in the eighth light-emitting element, reflecting that the thickness of the auxiliary electrode in the light-emitting element 200 with different light colors is different. Exemplary reference Figure 3 As shown, the seventh light emitting element can be understood as Figure 3 The light emitting element 200C in the figure, the eighth light emitting element can be understood as Figure 3In the light emitting element 200B, the thickness of the entire auxiliary electrode 212 shown in the light emitting element 200C is greater than the thickness of the entire auxiliary electrode 212 shown in the light emitting element 200B.

[0063] Further, for example, when n is 1, the relationship between D1 and D2 satisfies: (1+1) / 1≤D1 / D2≤(1+1) / 1, and D1 / D2 is 2. For example, when n is 2, the relationship between D1 and D2 satisfies: (2+1) / 2≤D1 / D2≤(2+1) / 1, that is, 3 / 2≤D1 / D2≤3. At this time, D1 / D2 can be any value between 3 / 2 and 3, such as 3 / 2, 1.8, 2, 2.15, 2.5, 2.8 or 3. For example, when n is 3, the relationship between D1 and D2 satisfies: (3+1) / 3≤D1 / D2≤(3+1) / 1, that is, 4 / 3≤D1 / D2≤4. At this time, D1 / D2 can be any value between 4 / 3 and 4, such as 4 / 3, 1.5, 1.8, 2, 2.15, 2.5, 2.8, 3, 3.2, 3.4, 3.7 or 4. For example, when n is 4, the relationship between D1 and D2 satisfies: (4+1) / 4≤D1 / D2≤(4+1) / 1, that is, 5 / 4≤D1 / D2≤5. At this time, D1 / D2 can be any value between 5 / 4 and 5, such as 5 / 4, 4 / 3, 1.5, 1.8, 2, 2.2, 2.5, 2.8, 3, 3.2, 3.4, 3.7, 4, 4.25, 4.5, 4.68, 4.83 or 5. In other words, the difference in thickness between the auxiliary electrode in the seventh light-emitting element and the auxiliary electrode in the eighth light-emitting element can be achieved by providing different layers of auxiliary electrodes 212 with the same thickness.

[0064] In general, the thickness of the auxiliary electrode 212 corresponding to the light emitting elements 200 with different light emitting colors is different, which can be achieved by having different thicknesses of the auxiliary electrodes 212 arranged at the light emitting elements 200 with different light emitting colors; or by having auxiliary electrodes 212 with different numbers of layers arranged at the light emitting elements 200 with different light emitting colors; or by having auxiliary electrodes 212 with different numbers of layers arranged at the light emitting elements 200 with different light emitting colors, and the auxiliary electrodes 212 themselves can also have different thicknesses. It reflects that the auxiliary electrodes 212 of the light emitting elements 200 with different light emitting colors have overall thickness differences, and the auxiliary electrodes 212 are arranged in a variety of ways.

[0065] Continue to refer Figure 3 As shown, the plurality of light emitting elements 200 include a third light emitting element, and the third light emitting element includes at least one layer of auxiliary electrode 212; the area of ​​the auxiliary electrode 212 is S1, and the area of ​​the reflective electrode 211 is S2, wherein |S1-S2| / S1≤10%.

[0066] Specifically, the light emitting element 200 includes a third light emitting element, and the third light emitting element includes at least one layer of auxiliary electrode 212, combined with Figure 3 As shown, the third light emitting element can refer to Figure 3 The light-emitting element 200B or the light-emitting element 200C.

[0067] For further reference, Figure 3 As shown, the area of ​​the auxiliary electrode 212 is S1, and the area of ​​the reflective electrode 211 is S2, wherein S1 and S2 satisfy: |S1-S2| / S1≤10%, which can be understood as the values ​​of S1 and S2 being the same or similar. It can also be considered that the orthographic projection of the auxiliary electrode 212 to one side of the drive substrate 100 is substantially coincident with the orthographic projection of the reflective electrode 211 to one side of the drive substrate 100.

[0068] Furthermore, when the size of the auxiliary electrode 212 in the third light-emitting element is adjusted to be the same as or similar to the size of the reflective electrode 211, the light-emitting element 200 will not increase its occupied area in the display panel 10 due to the additional auxiliary electrode 212, which is beneficial to realize the high pixel density setting mode of the display panel 10 and improve the overall display effect of the display panel 10. Furthermore, when the size of the auxiliary electrode 212 added to the light-emitting element 200 is the same as or similar to the size of the reflective electrode 211, the overall regularity of the light-emitting element 200 can also be guaranteed, and the auxiliary electrode 212 and the reflective electrode 211 can be prepared using the same etching protection layer, reducing the difficulty of the process preparation of the display panel 10 and reducing the process preparation cost of the display panel 10.

[0069] Continue to refer Figure 3 As shown, the plurality of light-emitting elements 200 include a fourth light-emitting element, which includes at least two layers of auxiliary electrodes 212 stacked together, the at least two layers of auxiliary electrodes 212 including a first auxiliary electrode 212a and a second auxiliary electrode 212b; the area of ​​the first auxiliary electrode 212a is S3, and the area of ​​the second auxiliary electrode 212b is S4, wherein |S3-S4| / S3≤10%.

[0070] Specifically, the light emitting element 200 further includes a fourth light emitting element, in which at least two layers of auxiliary electrodes 212 are provided. Figure 3 As shown, the fourth light emitting element can refer to Figure 3 Middle light emitting element 200C. Figure 3 The light-emitting element 200C in the embodiment is illustrated as including two layers of auxiliary electrodes 212, and the specific number of layers of the auxiliary electrodes 212 in the fourth light-emitting element can be adaptively adjusted according to actual needs, and the embodiment of the present invention does not specifically limit this.

[0071] For further reference, Figure 3As shown, the light emitting element 200C includes two layers of auxiliary electrodes 212, the two layers of auxiliary electrodes 212 are respectively a first auxiliary electrode 212a and a second auxiliary electrode 212b, the area of ​​the first auxiliary electrode 212a is S3, the area of ​​the second auxiliary electrode 212b is S4, S3 and S4 satisfy: |S3-S4| / S3≤10%, which can be understood as the values ​​of S3 and S4 are the same or similar. It can also be considered that the orthographic projection of the first auxiliary electrode 212a to one side of the driving substrate 100 is substantially coincident with the orthographic projection of the second auxiliary electrode 212b to one side of the driving substrate 100.

[0072] Furthermore, the two layers of auxiliary electrodes 212 provided in the fourth light-emitting element can improve the light emitting effect of the light-emitting element 200. At the same time, when the sizes of the two layers of auxiliary electrodes 212 in the fourth light-emitting element are adjusted to be the same or similar, the light-emitting element 200 will not increase its occupied area in the display panel 10 due to the increase in the number of auxiliary electrodes 212, which is beneficial to realize the high pixel density setting mode of the display panel 10 and improve the overall display effect of the display panel 10. Furthermore, when the sizes of the multiple layers of auxiliary electrodes 212 added in the light-emitting element 200 are the same or similar, the overall regularity of the light-emitting element 200 can also be guaranteed, and the multiple layers of auxiliary electrodes 212 can also be prepared using the same etching protection layer, reducing the difficulty of the process preparation of the display panel 10 and reducing the process preparation cost of the display panel 10.

[0073] Continue to refer Figure 4 and Figure 5 As shown, the plurality of light emitting elements 200 include a fifth light emitting element, and the fifth light emitting element 200 includes at least one layer of auxiliary electrode 212; the auxiliary electrode 212 covers the upper surface of the reflective electrode 211 away from the driving substrate 100 and the side surface connected to the upper surface.

[0074] Specifically, the light emitting element 200 includes a fifth light emitting element, and the fifth light emitting element includes at least one layer of auxiliary electrode 212, combined with Figure 4 and Figure 5 As shown, the fifth light emitting element can refer to Figure 4 and Figure 5 The light emitting element 200B, Figure 4 and Figure 5 In the example, the fifth light emitting element includes a layer of auxiliary electrode 212 .

[0075] For further reference, Figure 4 and Figure 5 As shown, the positive projection of the auxiliary electrode 212 toward the driving substrate 100 covers the positive projection of the reflective electrode 211 toward the driving substrate 100, and the auxiliary electrode 212 covers the upper surface of the reflective electrode 211 away from the driving substrate 100 (refer to Figure 4211a) and the side connected to the upper surface (reference Figure 4 This can be understood as the auxiliary electrode 212 disposed on the side of the reflective electrode 211 away from the driving substrate 100 covers the reflective electrode 211.

[0076] Furthermore, the size of the auxiliary electrode 212 is adjusted to be larger than that of the reflective electrode 211, and the auxiliary electrode 212 can cover the reflective electrode 211, so that it can be ensured that the auxiliary electrode 212 is arranged on the propagation path of the light reflected by the reflective electrode 211, that is, the light reflected by the reflective electrode 211 can adjust the cavity length of its microcavity effect through the auxiliary electrode 212, thereby ensuring that the microcavity effect is sufficient and the light intensity of the output light is fully adjusted.

[0077] Continue to refer Figure 4 and Figure 5 As shown, the plurality of light-emitting elements 200 include a sixth light-emitting element, the sixth light-emitting element includes at least two layers of auxiliary electrodes 212 stacked together, the at least two layers of auxiliary electrodes 212 include a third auxiliary electrode 212c and a fourth auxiliary electrode 212d, the fourth auxiliary electrode 212d is located on a side of the third auxiliary electrode 212c away from the driving substrate 100; the fourth auxiliary electrode 212d covers the upper surface of the third auxiliary electrode 212c on a side away from the driving substrate 100 and the side surface connected to the upper surface.

[0078] Specifically, the light emitting element 200 includes a sixth light emitting element, and the sixth light emitting element includes at least two layers of auxiliary electrodes 212, combined with Figure 4 and Figure 5 As shown, the sixth light emitting element can refer to Figure 4 and Figure 5 The light emitting element 200C, Figure 4 and Figure 5 In the example, the sixth light emitting element includes two layers of auxiliary electrodes 212. In fact, the auxiliary electrode 212 includes a third auxiliary electrode 212c and a fourth auxiliary electrode 212d, and the fourth auxiliary electrode 212d is located on a side of the third auxiliary electrode 212c away from the driving substrate 100.

[0079] For further reference, Figure 4 and Figure 5 As shown, the orthographic projection of the fourth auxiliary electrode 212d toward the driving substrate 100 covers the orthographic projection of the third auxiliary electrode 212c toward the driving substrate 100, and the fourth auxiliary electrode 212d covers the upper surface of the third auxiliary electrode 212c away from the driving substrate 100 (refer to Figure 5 212c1) and the side connected to the upper surface (reference Figure 5This can be understood as the fourth auxiliary electrode 212d disposed on the side of the third auxiliary electrode 212c away from the driving substrate 100 covering the third auxiliary electrode 212c.

[0080] Furthermore, the size of the fourth auxiliary electrode 212d is adjusted to be larger than that of the third auxiliary electrode 212c, and the fourth auxiliary electrode 212d can cover the third auxiliary electrode 212c, so as to ensure that the light whose cavity length is adjusted by the third auxiliary electrode 212c can be adjusted again by the fourth auxiliary electrode 212d, thereby ensuring sufficient microcavity modulation and sufficient light intensity adjustment.

[0081] Continue to refer Figure 3 and Figure 4 As shown, the display panel 10 also includes a first pixel defining structure 310 at least partially located on the side of the first electrode 210 away from the driving substrate 100, and a pixel opening 311 is provided in the first pixel defining structure 310, and the pixel opening 311 penetrates the first pixel defining structure 310 and exposes at least a portion of the first electrode 210; the first pixel defining structure 310 covers a portion of the upper surface of the first electrode 210 away from the driving substrate 100.

[0082] Further, the display panel 10 further includes a first pixel defining structure 310, and the first pixel defining structure 310 includes a pixel opening 311. The pixel opening 311 can be understood as a hollow area of ​​the first pixel defining structure 310, or as an opening area formed by patterning and etching the first pixel defining structure 310. Figure 3 and Figure 4 As shown, the first pixel defining structure 310 covers a portion of the upper surface of the first electrode 210 away from the driving substrate 100, that is, at least a portion of the first pixel defining structure 310 is located on the side of the first electrode 210 away from the driving substrate 100. The material of the first pixel defining structure 310 can be an organic structure or an inorganic structure, and the embodiment of the present invention does not specifically limit it here.

[0083] Continue to refer Figure 3 As shown, the first pixel defining structure 310 includes a plurality of independently arranged pixel defining substructures 312, and the pixel defining substructures 312 correspond to the light-emitting element 200; the pixel defining substructures 312 cover the upper surface of a portion of the first electrode 210 in the light-emitting element 200 corresponding thereto, which is away from the driving substrate 100, and the orthographic projection of the pixel defining substructure 312 on the plane where the driving substrate 100 is located is located within the orthographic projection of the first electrode 210 in the light-emitting element 200 corresponding thereto on the plane where the driving substrate 100 is located.

[0084] Among them, reference Figure 3As shown, the first pixel defining structure 310 includes a plurality of pixel defining substructures 312, and the pixel defining substructures 312 are located on the upper surface of the first electrode 210 away from the driving substrate 100. At the same time, the orthographic projection of the pixel defining substructure 312 onto the driving substrate 100 is located within the orthographic projection area of ​​the first electrode 210 in the light emitting element 200 corresponding thereto onto the driving substrate 100. It can be understood that, referring to Figure 3 As shown, the pixel defining substructure 312 is only disposed on one side of the first electrode 210 away from the driving substrate 100 , and the arrangement area of ​​the pixel defining substructure 312 does not exceed the area where the first electrode 210 is located.

[0085] Among them, the pixel defining substructure 312 is arranged on the side of the first electrode 210 away from the driving substrate 100. In the preparation of the display panel 10, the pixel defining substructure 312 can be used to perform patterned etching on the first electrode 210 (reflective electrode 211 and auxiliary electrode 212), thereby reducing the process preparation cost of the display panel 10. Furthermore, the pixel defining substructure 312 is arranged on one side of the first electrode 210 of different light-emitting elements 200, and considering the setting position of the pixel defining substructure 312, the pixel defining substructure 312 on different light-emitting elements 200 can be understood as an independently arranged structure. The independent pixel defining substructure 312 can ensure that the pixel openings 311 of different light-emitting elements 200 are also independent, avoiding the influence of the deviation of the etching process size on the accuracy of the pixel opening 311, ensuring the preparation effect of the pixel opening 311, and thus improving the display effect of the display panel 10.

[0086] Continue to refer Figure 3 As shown, the display panel 10 also includes a second pixel defining structure 320; the driving substrate 100 includes a planarization layer 105, and the first electrode 210 is located on the side of the planarization layer 105 away from the driving circuit 110; the second pixel defining structure 320 covers at least part of the surface of the first pixel defining structure 310 away from the driving substrate 100, and contacts and covers the planarization layer 105 between two adjacent pixel defining substructures 312.

[0087] Among them, reference Figure 3As shown, the display panel 10 further includes a second pixel defining structure 320, and the second pixel defining structure 320 includes a partial structure located on the side of the first pixel defining structure 310 away from the driving substrate 100; the second pixel defining structure 320 also includes a partial structure located between two adjacent pixel defining substructures 312, and the second pixel defining structure 320 located between two adjacent pixel defining substructures 312 is also located on the side of the planarization layer 105 away from the driving substrate 100. It can be understood that the second pixel defining structure 320 covers at least a portion of the pixel defining substructure 312, and also covers the planarization layer 105 between different light-emitting elements 200.

[0088] refer to Figure 3 As shown, the second pixel defining structure 320 increases the height of the display panel 10 in the thickness direction of the driving substrate 100, thereby increasing the extension path of the light-emitting layer 220 in the light-emitting element 200, thereby reducing the leakage current between two adjacent light-emitting elements 200 and reducing the display crosstalk between two adjacent light-emitting elements, thereby improving the overall display effect of the display panel 10.

[0089] Continue to refer Figure 3 As shown, the first pixel definition structure 310 includes an inorganic pixel definition structure, and the second pixel definition structure 320 includes an organic pixel definition structure.

[0090] For further reference, Figure 3 As shown, the first pixel defining structure 310 may be an inorganic pixel defining structure, or the pixel defining substructure 312 may be an inorganic pixel defining structure; the second pixel defining structure 320 may be an organic pixel defining structure. The film thickness of the organic pixel defining structure may be set thicker, so that the material of the second pixel defining structure 320 is selected as an organic material, which can further increase the extension path of the light-emitting layer 220 in the light-emitting element 200, better reduce the leakage current between two adjacent light-emitting elements 200, and thus improve the overall display effect of the display panel 10.

[0091] Figure 6 yes Figure 2 The fourth cross-sectional diagram along the section line A-A' is shown in Fig. Figure 7 yes Figure 2 The fifth cross-sectional diagram along the section line A-A', refer to Figure 6 and Figure 7 As shown, the driving substrate 100 includes a planarization layer 105 , and the first electrode 210 is located on a side of the planarization layer 105 away from the driving circuit 100 ; the first pixel defining structure 310 also contacts and covers the planarization layer 105 between two adjacent first electrodes 210 .

[0092] Specifically, refer to Figure 6 and Figure 7 As shown, the first pixel defining structure 310 includes a partial structure covering between two adjacent first electrodes 210, and the partial structure covers the planarization layer 105; the first pixel defining structure 310 also includes a partial structure on the side of the first electrode 210 away from the driving substrate 100. It can be understood that the first pixel defining structure 310 covers a portion of the first electrode 210, and also covers the planarization layer 105 between different light-emitting elements 200.

[0093] For further reference, Figure 6 and Figure 7 As shown, the first pixel defining structure 310 covers a portion of the first electrode 210, and at the same time, the first pixel defining structure 310 also covers the planarization layer 105 between two adjacent first electrodes 210. The first pixel defining structure 310 can raise the film layer height in the area between two adjacent first electrodes 210, and after raising, the overall flatness of the display panel can be improved, which is convenient for improving good planarization conditions for the subsequent preparation of the second electrode 230, and ensuring the good stability of the second electrode 230.

[0094] Continue to refer Figure 4 and Figure 5 As shown, the display panel 10 further includes a third pixel defining structure 330 ; the third pixel defining structure 330 is located on a side of the first pixel defining structure 310 away from the driving substrate 100 , and covers at least a portion of the first pixel defining structure 310 .

[0095] For further reference, Figure 4 and Figure 5 As shown, the display panel 10 also includes a third pixel defining structure 330, wherein the third pixel defining structure 330 is located on a side of the first pixel defining structure 310 away from the driving substrate 100. By setting the third pixel defining structure 330, the overall film thickness can be increased, and after the increase, the extension path of the light-emitting layer 220 in the light-emitting element 200 can be increased, thereby reducing the leakage current between two adjacent light-emitting elements 200 and reducing the display crosstalk between two adjacent light-emitting elements, thereby improving the overall display effect of the display panel 10.

[0096] For further reference, Figure 4 and Figure 5 As shown, the third pixel defining structure 330 covers at least a portion of the first pixel defining structure 310, and the orthographic projection of the third pixel defining structure 330 onto the driving substrate 100 does not overlap with the orthographic projection of the pixel opening 111 onto the driving substrate 100. The arrangement of the third pixel defining structure 330 will not interfere with the pixel opening 311, and will not block the light output of the light emitting element 200. Exemplarily, Figure 4The description is made by taking the case where the orthographic projection of the third pixel defining structure 330 onto the driving substrate 100 is located between the orthographic projections of the two reflective electrodes 211 onto the driving substrate 100 as an example; Figure 5 The description is made by taking the orthographic projection of the third pixel defining structure 330 onto the driving substrate 100 partially overlapping with the reflective electrode 211 as an example. Whether there is an overlapping area between the orthographic projection of the third pixel defining structure 330 onto the driving substrate 100 and the orthographic projection of the reflective electrode 211 onto the driving substrate 100 can be adaptively adjusted according to different display panels 10, or it can be understood that the area of ​​the third pixel defining structure 330 covering the first pixel defining structure 310 can be adaptively adjusted according to different display panels 10, and this is not limited in the embodiment of the present invention.

[0097] Figure 8 yes Figure 3 An enlarged schematic diagram of a light-emitting element, Fig. 9 yes Figure 3 An enlarged schematic diagram of another light-emitting element in FIG. Fig.10 is a schematic structural diagram of a first light-emitting element provided by an embodiment of the present invention, Fig.11 is a schematic diagram of the structure of the second light emitting element provided in an embodiment of the present invention, with reference to Figure 3 , Figure 4 , Figures 6 to 11 As shown, the first pixel defining structure 310 includes a first defining side wall 312a close to a side of the pixel opening 311, a first groove 312b is arranged in the first defining side wall 312a, and the first groove 312b penetrates a portion of the first defining side wall 312a; the light-emitting element 200 also includes a multi-layer light-emitting layer 220 located on a side of the first electrode 210 away from the driving substrate 100, and at least one layer of the light-emitting layer 220 is disconnected at the position of the first groove 312b.

[0098] For further reference, Figure 3 , Figure 4 , Figure 6 , Figures 7 to 9 As shown, the first pixel defining structure 310 includes a first defining sidewall 312a close to a side of the pixel opening 311, and includes a first groove 312b on the first defining side 312a, and the first groove 312b is equivalent to the indented area of ​​the first defining side 312a. The light-emitting element 200 includes a first electrode 210, a multi-layer light-emitting layer 220, and a second electrode 230, wherein at least one layer of the multi-layer light-emitting layer 220 is disconnected at the first groove 312b, which can avoid leakage transmission of holes or electrons between different light-emitting elements 200, thereby avoiding crosstalk between different light-emitting elements 200, and ensuring the display effect of the display panel 10.

[0099] Optional, reference Fig.10, the light-emitting layer 220 may include a plurality of film layers, and along the direction from the first electrode 210 to the second electrode 230, the light-emitting layer 220 may be: a hole injection layer (HIL) 221, a hole transport layer (HTL) 222, a compensation layer (Prime) 223, an emitting film layer (EML) 224, a hole blocking layer (HBL) 225, an electron transport layer (ETL) 226, and an electron injection layer (EIL) 227. Among them, corresponding to light-emitting elements 200 of different colors, the compensation layer 223 includes a red compensation layer (R-Prime), a blue compensation layer (B-Prime) and a green compensation layer (G-Prime), etc. Further, the light-emitting elements 200 of different colors can further change the cavity length of the light-emitting element 200 by adjusting the thickness of the compensation layer. By adjusting the thickness of the auxiliary electrode and the thickness of the compensation layer, the cavity length of the microcavity effect is jointly adjusted to ensure that light of different colors can constructively interfere in the microcavity and improve the light intensity. Specifically, the light-emitting principle of the light-emitting element 200 is further understood as follows: a certain voltage is applied to the first electrode 210 and the second electrode 230 respectively, and the holes from the first electrode 210 are injected into the hole transport layer 222 through the hole injection layer 221, and the electrons from the second electrode 230 are injected into the electron transport layer 226 through the electron injection layer 227. The holes and electrons migrate to the light-emitting film layer 224 through the hole transport layer 222 and the electron transport layer 226 respectively, and form excitons in the light-emitting film layer 224. The excitons excite the light-emitting molecules in the light-emitting film layer 224 and emit light. Among them, the hole blocking layer 225 is used to block holes from passing through the light-emitting film layer 224 into the electron transport layer 226, so that the holes and electrons are combined in the light-emitting film layer 224 to form excitons.

[0100] Optional, reference Fig.11As shown, the display panel 10 can also be a tandem display panel (Tandem OLED), that is, the light-emitting element 200 is a stacked light-emitting unit, and the display panel 10 that uses the stacked light-emitting element 200 to emit light is called a tandem display panel, that is, multiple light-emitting layers are stacked in series through a charge generation layer (CGL) in the light-emitting element 200. Among them, the tandem display panel can enable the light-emitting element 200 to be driven at the same current density, so that the brightness of the display panel 10 is greatly improved. Specifically, when multiple light-emitting film layers 224 are connected in series in the light-emitting element 200 of the tandem display panel, for example, when two light-emitting film layers 224 are connected in series, the voltage of the second electrode 230 applied will become twice, the current efficiency will also become twice, and the constant current life decay is consistent, so the corresponding constant brightness life will be more than doubled, the potential for life improvement is greater, and the power consumption is also advantageous.

[0101] Specifically, when the display panel 10 is a tandem display panel, Fig.11 As shown, multiple film layers are stacked in sequence, and a charge generation layer 240 that can be electrically connected is provided between the film layers. Fig.11 In the figure, two charge generation layers 240 are used as an example. Further, Fig.11 A schematic diagram of the structure of a light-emitting element 200 in a tandem display panel 10 is shown. Along the direction from the first electrode 210 to the second electrode 230, the film layer structure may be a hole injection layer 221, a hole transport layer 222, a compensation layer 223, a light-emitting film layer 224, a hole blocking layer 225, an electron transport layer 226, two charge generation layers 240, a hole transport layer 222, a compensation layer 223, a light-emitting film layer 224, an electron transport layer 226 and an electron injection layer 227. Among them, the charge generation layer 240 may include a P-type charge generation layer (CGL-P) and an N-type charge generation layer (CGL-N), which are used to generate holes and electrons, respectively. A light-emitting film layer 224 is provided between the electron transport layer 226 and the hole transport layer 222, that is, the light-emitting layer 220 in the light-emitting element 200 includes at least two light-emitting film layers 224. It should be noted that Fig.10 and Fig.11 In the embodiment, the light-emitting film layer 224 in the light-emitting element 200 can be a light-emitting layer of red light, a light-emitting layer of blue light, or a light-emitting layer of green light, and the embodiment of the present invention does not specifically limit this. Furthermore, the light-emitting element 200 in the display panel 10 can also include a light-emitting layer of red light, a light-emitting layer of blue light, and a light-emitting layer of green light, and finally display white light, etc. For the light-emitting elements in the series display panel, the cavity length of the microcavity effect can also be adjusted by adjusting the thickness of the auxiliary electrode and the thickness of the compensation layer, so as to ensure that light of different colors can constructively interfere in the microcavity and improve the light intensity.

[0102] The light emitting element 200 in the display panel 10 provided in the embodiment of the present invention may be as follows: Fig.10 The light emitting element 200 shown may also be Fig.11 The light emitting element 200 shown in the figure does not specifically limit the specific structure of the light emitting element 200 in the embodiment of the present invention, and the film layer in the light emitting unit 500 can be adaptively adjusted according to different actual requirements.

[0103] It should be noted that the light emitting layer 220 is disconnected at the first groove 312b, which may be that at least part of the film layers in the light emitting layer 220 are disconnected, for example, only the hole injection layer 221 and the hole transport layer 222 are disconnected; or at least the film layer in the light emitting layer 220 fills the first groove 312b, which is equivalent to adding a transport path. For the specific disconnection of the film layer in the light emitting layer 220 at the first groove 312b, the process can be adjusted according to different requirements to achieve different film layer disconnection conditions.

[0104] refer to Figure 5 As shown, the first pixel defining structure 310 includes an organic pixel defining structure, and the third pixel defining structure 330 includes an inorganic pixel defining structure; the third pixel defining structure 330 covers the surface and side of the first pixel defining structure 310 away from the driving substrate 100; the third pixel defining structure 330 includes a second defining side wall 331a close to the pixel opening 311, and a second groove 331b is arranged in the second defining side wall 331a, and the second groove 331b passes through a portion of the second defining side wall 331a.

[0105] For further reference, Figure 5 As shown, the first pixel defining structure 310 includes an organic pixel defining structure, the third pixel defining structure 330 includes an inorganic pixel defining structure, and the third pixel defining structure 330 covers the surface of the first pixel defining structure 310 away from the driving substrate 100 (refer to Figure 5 310a) and side (reference Figure 5 310b). Further, the third pixel defining structure 330 includes a second defining sidewall 331a close to one side of the pixel opening 311, and a second groove 331b is provided in the second defining sidewall 331a, and the second groove 331b is equivalent to the indented area of ​​the second defining sidewall 331a. The light-emitting element 200 includes a first electrode 210, a multi-layer light-emitting layer 220, and a second electrode 230, wherein at least one layer of the multi-layer light-emitting layer 220 is disconnected at the second groove 331b, which can avoid leakage transmission of holes or electrons between different light-emitting elements 200, thereby avoiding crosstalk between different light-emitting elements 200, and ensuring the display effect of the display panel 10.

[0106] It should be noted that the light emitting layer 220 is disconnected at the second groove 331b, which may be that at least part of the film layers in the light emitting layer 220 are disconnected, for example, only the hole injection layer 221 and the hole transport layer 222 are disconnected; or at least the film layer in the light emitting layer 220 fills the second groove 331b, which is equivalent to adding a transport path. For the specific disconnection of the film layer in the light emitting layer 220 at the second groove 331b, the process can be adjusted according to different requirements to achieve different film layer disconnection conditions.

[0107] Continue to refer Figures 3 to 5 , Figure 7 As shown, the display panel 10 also includes an organic pixel defining structure. Along the thickness direction of the display panel 10 , the organic pixel defining structure at least overlaps with the gap between two adjacent first electrodes 210 ; the thickness of the organic pixel defining structure is greater than or equal to the thickness of the first electrode 210 .

[0108] Further, the display panel 10 includes an organic pixel defining structure, and the orthographic projection of the organic pixel defining structure onto the driving substrate 100 overlaps with the orthographic projection of the gap between two adjacent first electrodes 210 onto the driving substrate 100. Further, the thickness of the organic pixel defining structure is adjusted to be greater than or equal to the thickness of the first electrode 210. By adjusting the thickness of the organic pixel defining structure to be greater, the extension path of the light-emitting layer 220 in the light-emitting element 200 can be increased, thereby reducing the leakage current between two adjacent light-emitting elements 200, thereby avoiding the crosstalk between different light-emitting elements 200, thereby improving the overall display effect of the display panel 10.

[0109] Exemplary, reference Figure 3 As shown, in Figure 3 The second pixel defining structure 320 may be an organic pixel defining structure; Figure 4 As shown, in Figure 4 The third pixel defining structure 330 may be an organic pixel defining structure; Figure 5 As shown, in Figure 5 The first pixel defining structure 310 may be an organic pixel defining structure; Figure 7 As shown, in Figure 7 The first pixel defining structure 310 may be an organic pixel defining structure. For different display panels 10, the setting position of the organic pixel defining structure may be adjusted to different degrees. However, when the thickness of the organic pixel defining structure is greater than or equal to the thickness of the first electrode 210, the overall display effect of the display panel 10 may be better guaranteed.

[0110] Continue to refer Figures 3 to 5 , Figure 7As shown, the light emitting element 200 with different light emitting colors includes a first light emitting element and a second light emitting element; the thickness of the organic pixel defining structure arranged corresponding to the first light emitting element is the same as that of the organic pixel defining structure arranged corresponding to the second light emitting element.

[0111] Furthermore, the display panel 10 includes a first light emitting element and a second light emitting element, and the light emitting color of the first light emitting element is different from the light emitting color of the second light emitting element, which can correspond to Figures 3 to 5 , Figure 7 Any two of the light emitting element 200A, the light emitting element 200B and the light emitting element 200C shown. Figure 3 As shown, taking the light-emitting element 200C or the light-emitting element 200B as an example for the first light-emitting element, the organic pixel defining structure arranged corresponding to the first light-emitting element can be understood as a second pixel defining structure 320 overlapping with the projection of the light-emitting element 200C onto the driving substrate 100, or a second pixel defining structure 320 surrounding at least a portion of the first electrode of the light-emitting element 200C; taking the light-emitting element 200A as an example for the second light-emitting element, the organic pixel defining structure arranged corresponding to the second light-emitting element can be understood as a second pixel defining structure 320 overlapping with the projection of the light-emitting element 200A onto the driving substrate 100, or a second pixel defining structure 320 surrounding at least a portion of the first electrode of the light-emitting element 200C.

[0112] Furthermore, the thickness of the organic pixel defining structures corresponding to the light emitting elements 20 of different colors can be the same, so that the overall regularity and flatness of the display panel 10 can be ensured, and the difficulty of manufacturing the display panel 10 can be reduced. Figures 3 to 5 , Figure 7 As shown, due to the difference in the number of layers of the auxiliary electrode 212 in the light-emitting element 200A, the light-emitting element 200B and the light-emitting element 200C, the overall thickness of the light-emitting element 200A, the light-emitting element 200B and the light-emitting element 200C are different, but the thickness of the organic pixel defining structure arranged between the light-emitting element 200A and the light-emitting element 200B is the same as the thickness of the organic pixel defining structure between the light-emitting element 200B and the light-emitting element 200C, which can reflect the overall regularity of the display panel 10.

[0113] Based on the same invention communication, an embodiment of the present invention further provides a method for preparing a display panel. Fig.12 is a flow chart of a method for preparing a first display panel provided by an embodiment of the present invention, with reference to Fig.12 As shown, the method for preparing the display panel includes:

[0114] S110, preparing a driving substrate.

[0115] Among them, the driving substrate includes a driving circuit, and the driving circuit is electrically connected to the light-emitting element prepared later. The driving circuit can provide a driving current for the light-emitting element, thereby driving the light-emitting element to perform light-emitting display and realize the display function of the display panel. Furthermore, the driving circuit in the driving substrate may include a transistor, and the transistor may include an active layer, a gate, a source and a drain. In addition, the setting mode of the driving circuit is diverse, for example, it can be "7T1C", "8T2C", etc., where "T" represents a transistor and "C" represents a capacitor. The specific setting mode of the driving circuit in the driving substrate can be adaptively adjusted according to different display panels, and the embodiment of the present invention does not specifically limit this.

[0116] Furthermore, the driving substrate may include a substrate, a gate insulating layer, a first interlayer insulating layer, a second interlayer insulating layer and a planarization layer, etc. The gate insulating layer, the first interlayer insulating layer, the second interlayer insulating layer and the planarization layer may be arranged between two adjacent metal layers to play the role of signal isolation and planarization.

[0117] S120, preparing a first electrode on one side of the driving substrate.

[0118] Furthermore, a plurality of light-emitting elements are prepared on one side of the driving substrate, and the driving circuit in the driving substrate is electrically connected to the light-emitting elements. The driving circuit can provide driving current for the light-emitting elements, thereby driving the light-emitting elements to emit light and display, thereby realizing the display function of the display panel.

[0119] Specifically, the light-emitting element includes a first electrode, and the light-emitting element is electrically connected to the driving circuit through the first electrode. In other words, the driving current provided by the driving circuit is transmitted to the light-emitting element through the first electrode. Furthermore, the light-emitting element also includes a light-emitting layer and a second electrode, and the light-emitting layer is located between the first electrode and the second electrode. Among them, the light-emitting principle of the light-emitting element can be understood as: applying certain electrical signals to the first electrode and the second electrode respectively, the holes from the first electrode and the electrons from the second electrode converge in the light-emitting layer, and are further excited in the light-emitting layer to emit light, thereby realizing the light-emitting element.

[0120] Furthermore, the second electrode can be a semi-transmissive and semi-reflective electrode, and the light emitted by the light-emitting layer can be reflected multiple times in the microcavity formed by the reflective electrode and the second electrode, and light of a specific wavelength will produce constructive interference, thereby enhancing the light intensity. Among them, constructive interference occurs when the distance between the first electrode and the second electrode is an integer multiple of the wavelength of the transmitted light, and the relationship is as follows:

[0121] d=n*(λ / 2)

[0122] Here, d represents the distance between the reflective electrode 211 and the second electrode 230 .

[0123] It can be seen from the above relationship that in order to ensure constructive interference, it is necessary to ensure that the distance between the reflective electrode and the second electrode satisfies an integer multiple of the wavelength, that is, the distance between the reflective electrode and the second electrode in the light-emitting element with a large light-emitting wavelength is required to be large. Therefore, in an embodiment of the present invention, the distance between the reflective electrode and the second electrode is adjusted by adjusting the thickness of the auxiliary electrode. Specifically, by setting the thickness of the auxiliary electrode to be different in the light-emitting elements with different light-emitting colors, specifically, in the light-emitting element with a larger light-emitting wavelength, the thickness of the auxiliary electrode is larger, and in the light-emitting element with a smaller light-emitting wavelength, the thickness of the auxiliary electrode is smaller. By adjusting the thickness of the auxiliary electrode to adjust the cavity length of the microcavity effect, it is ensured that light of different colors can constructively interfere in the microcavity, thereby improving the light intensity.

[0124] Furthermore, at least part of the first electrode further includes an auxiliary electrode, and the thickness of the auxiliary electrode in the light-emitting elements of different colors can be set differently. By setting the auxiliary electrode and adjusting the thickness of the auxiliary electrode between the light-emitting elements of different colors to be different, the gap between the reflective electrode and the second electrode in the light-emitting elements of different colors can be different.

[0125] For example, if the wavelength of the red light-emitting element is greater than that of the green light-emitting element, the thickness of the auxiliary electrode in the red light-emitting element can be adjusted to be greater than the thickness of the auxiliary electrode in the green light-emitting element; if the wavelength of the green light-emitting element is greater than that of the blue light-emitting element, the thickness of the auxiliary electrode in the green light-emitting element can be adjusted to be greater than the thickness of the auxiliary electrode in the blue light-emitting element.

[0126] In summary, the method for preparing a display panel provided in an embodiment of the present invention sets the auxiliary electrodes of light-emitting elements of different colors in a differentiated manner, and adjusts the cavity length in the microcavity effect by adjusting the thickness of the auxiliary electrodes of light-emitting elements of different colors, thereby adjusting the light-emitting effects of light-emitting elements of different colors and ensuring the display effect of the display panel.

[0127] Fig.13 is a flow chart of a second method for preparing a display panel provided by an embodiment of the present invention, with reference to Fig.13 As shown, the preparation method also includes:

[0128] S210, preparing a driving substrate.

[0129] S210, preparing a reflective electrode layer on one side of the driving substrate.

[0130] Wherein, a reflective electrode layer is prepared on one side of the driving substrate. The reflective electrode layer is a metal layer that can reflect light. The reflective electrode layer is patterned and etched through a subsequent process to form a corresponding reflective electrode.

[0131] S230 , preparing at least one auxiliary electrode layer and a first etching protection structure on a side of the reflective electrode layer away from the driving substrate.

[0132] Furthermore, at least one auxiliary electrode layer is prepared on the side of the reflective electrode layer away from the substrate, and the specific number of auxiliary electrode layers can be differentiated according to the light-emitting elements that need to be formed later. For example, in the reflective electrode layer, after patterned etching, the reflective electrode corresponding to the red light-emitting element is used, and two or more auxiliary electrode layers can be prepared at the corresponding reflective electrode layer; for example, in the reflective electrode layer, after patterned etching, the reflective electrode corresponding to the green light-emitting element is used, and one auxiliary electrode layer can be prepared at the corresponding reflective electrode layer; for example, in the reflective electrode layer, after patterned etching, the reflective electrode corresponding to the blue light-emitting element is used, and no auxiliary electrode layer may be prepared at the corresponding reflective electrode layer. The number of auxiliary electrode layers can be differentiated according to different display panels and light-emitting elements of different colors in the display panel, and the specific number of auxiliary electrode layers can be adaptively increased or decreased according to actual needs, and the embodiments of the present invention do not limit this.

[0133] S240 , etching at least the auxiliary electrode layer through the first etching protection structure.

[0134] Furthermore, a first etching protection structure is prepared on the side of the reflective electrode layer away from the driving substrate, and the auxiliary electrode layer can be etched through the first etching protection structure. Specifically, the auxiliary electrode layer is protected from being etched in the area where the first etching protection structure is set, thereby forming a corresponding auxiliary electrode; the auxiliary electrode layer is etched and removed in the area where the first etching protection structure is not set, thereby achieving patterned etching of the auxiliary electrode layer. Furthermore, other film layer structures, such as the reflective electrode layer, can also be etched and removed through the first etching protection structure, and the auxiliary electrode layer and the reflective electrode layer can be patterned etched simultaneously through the first etching protection structure, which can reduce the process preparation cost of the display panel.

[0135] Fig.14 is a flow chart of a third method for preparing a display panel provided by an embodiment of the present invention, Fig.15 is a schematic diagram of the process of preparing the first display panel provided by an embodiment of the present invention, with reference to Fig.14 and Fig.15 As shown, the preparation method also includes:

[0136] S310, preparing a driving substrate.

[0137] Specifically, refer to Fig.15 In step a, a driving substrate 100 is prepared.

[0138] S320, preparing a reflective electrode layer on one side of the driving substrate.

[0139] Specifically, refer to Fig.15 In step b, a reflective electrode layer 410 is prepared on one side of the driving substrate 100 .

[0140] S330, preparing a second etching protection structure on a side of the reflective electrode layer away from the driving substrate and in a portion of the first electrode arrangement area.

[0141] Specifically, refer to Fig.15 In step c, a second etching protection structure 420 is provided on a side of the reflective electrode layer 410 away from the driving substrate 100, and the second etching protection structure 420 is not provided on the entire surface. The reflective electrode layer 410 is subsequently etched to form a plurality of reflective electrodes, and the area where the first electrode is subsequently formed in the reflective electrode layer 410 by etching can be understood as the area where the first electrode is provided. Furthermore, the second etching protection structure 420 is provided in the area where part of the first electrode is provided, and the rest of the reflective electrode layer can be removed by the second etching protection structure 420 later.

[0142] S340 , preparing at least one auxiliary electrode layer on a side of the second etching protection structure away from the driving substrate.

[0143] Specifically, refer to Fig.15 In step d, at least one auxiliary electrode layer 430 is prepared on the side of the second etching protection structure 420 away from the driving substrate 100. The material of the auxiliary electrode layer 430 can be indium tin oxide or other transparent conductive materials. The auxiliary electrode layer 430 can be subsequently formed into an auxiliary electrode 212 by patterned etching. The number of layers of the auxiliary electrode layer 430 is differentiated to achieve the difference in the number of layers of the auxiliary electrode 212 in different light-emitting elements, and then the gap between the reflective electrode 211 and the second electrode 230 prepared later can be differentiated.

[0144] S350, preparing a first etching protection structure on a side of the auxiliary electrode layer away from the driving substrate and in the remaining area where the first electrode is disposed.

[0145] Specifically, refer to Fig.15 In step e, a first etching protection structure 440 is prepared on the side of the auxiliary electrode layer 430 away from the driving substrate 100 and in the remaining first electrode arrangement area. The remaining first electrode arrangement area can be understood as the first electrode arrangement area where the second etching protection structure 420 is not arranged.

[0146] For further reference, Fig.15In step e, the auxiliary electrode layer 430 covers the second etching protection structure 420, and another auxiliary electrode layer 430 may be disposed on the side of the first etching protection structure 440 (refer to the first etching protection structure 441 in the figure) away from the driving substrate 100. Fig.15 In step f, a first etching protection structure 440 is further disposed in the remaining first electrode arrangement region away from the auxiliary electrode layer 430 (refer to the first etching protection structure 442 in the figure). In this way, there is no auxiliary electrode layer 430 between the second etching protection structure 440 and the reflective electrode layer 410, one auxiliary electrode layer 430 is present between the first etching protection structure 441 and the reflective electrode layer 410, and two auxiliary electrode layers 430 are present between the first etching protection structure 442 and the reflective electrode layer 410, so that different numbers of auxiliary electrode layers 430 can be present between different first electrode arrangement regions and corresponding etching protection structures.

[0147] S360, etching the reflective electrode layer through the second etching protection structure, and etching the reflective electrode layer and the auxiliary electrode layer through the first etching protection structure to obtain the reflective electrode and the auxiliary electrode located in the setting area of ​​the first electrode.

[0148] For further reference, Fig.15 In step g, the auxiliary electrode layer 430 where the first etching protection structure 440 is not provided can be removed by the first etching protection structure 440, so that the auxiliary electrode layer 430 where the first etching protection structure 440 is close to the driving substrate 100 is retained, thereby forming an auxiliary electrode 212. Correspondingly, there is a layer of auxiliary electrode 212 between the first etching protection structure 441 and the driving substrate 100, and there are two layers of auxiliary electrode 212 between the first etching protection structure 442 and the driving substrate 100.

[0149] Furthermore, the reflective electrode layer 410 without the etching protection structure is removed by the second etching protection structure 420 and the first etching protection structure 440, thereby retaining the reflective electrode layer 410 near the driving substrate 100 of the first etching protection structure 440 and the reflective electrode layer 410 near the driving substrate 100 of the second etching protection structure 420, thereby forming a corresponding reflective electrode 211.

[0150] Correspondingly, the preparation of the first electrode 210 in the light-emitting element is completed by preparing the auxiliary electrode 212 and the reflective electrode 211. The second etching protection structure 420 and the first etching protection structure 440 can realize the synchronous preparation of the auxiliary electrode 212 and the reflective electrode 211 in the first electrode 210. Further, the auxiliary electrode 212 and the reflective electrode 211 are prepared synchronously, so the size of the reflective electrode 211 and the auxiliary electrode 212 are the same or similar, and the light-emitting element 200 will not increase its space occupied area in the display panel 10 due to the increase in the number of auxiliary electrodes 212, which is beneficial to realize the high pixel density setting mode of the display panel 10 and improve the overall display effect of the display panel 10. Further, the size of the multi-layer auxiliary electrodes 212 added in the light-emitting element 200 is the same or similar, and the overall regularity of the light-emitting element 200 can also be guaranteed, and the multi-layer auxiliary electrodes 212 can also be prepared using the same etching protection layer, reducing the difficulty of the process preparation of the display panel 10 and reducing the process preparation cost of the display panel 10.

[0151] The first etching protection structure 440 can simultaneously etch and remove the reflective electrode layer 410 and the auxiliary electrode layer 430 , and the second etching protection structure 420 can etch and remove the auxiliary electrode layer 430 .

[0152] S370, preparing a pixel opening in the etching protection structure, and reusing the etching protection structure as a first pixel defining structure that defines a light-emitting area of ​​the light-emitting element.

[0153] For further reference, Fig.15 In step g and step h, the etching protection structure includes a first etching protection structure 440 and a second etching protection structure 420, and the first etching protection structure 440 and the second etching protection structure 420 can be reused as the first pixel defining structure 310, and the first pixel defining structure 310 is etched to form a corresponding pixel opening 311. Specifically, the pixel opening 311 can be understood as a hollow area of ​​the first pixel defining structure 310, or the pixel opening 311 is an opening area formed by patterning the first pixel defining structure 310.

[0154] S380, preparing a first groove in the first limiting side wall, wherein the first groove partially penetrates the first limiting side wall.

[0155] Continue to refer Fig.15 As shown in step h, and can refer to Figure 8 and Fig. 9As shown, the first pixel defining structure 310 includes a first defining sidewall 312a close to a side of the pixel opening 311, and includes a first groove 312b on the first defining side 312a, and the first groove 312b is equivalent to the indented area of ​​the first defining side 312a. Optionally, the first groove can be prepared simultaneously with the preparation of the pixel opening; or the etching protection structure can be firstly etched to prepare the pixel opening, and then the first groove can be prepared on the first defining side.

[0156] S390, preparing a plurality of light-emitting layers on a side of the first electrode away from the driving substrate, wherein at least one light-emitting layer is disconnected at a position of the first groove.

[0157] refer to Fig.15 In step i, the light emitting element 200 includes a first electrode 210, a multi-layer light emitting layer 220 and a second electrode 230, wherein at least one layer of the prepared multi-layer light emitting layer 220 is disconnected at the first groove 312b, which can avoid leakage transmission of holes or electrons between different light emitting elements 200, thereby avoiding crosstalk between different light emitting elements 200, and ensuring the display effect of the display panel 10. In order to clearly see the disconnection of the light emitting layer, you can refer to Figure 8 and Fig. 9 As shown, at least different layers in the multi-layer light emitting layer 220 are disconnected at the first groove 312b.

[0158] For further reference, Figure 8 and Fig. 9 As shown, the first pixel defining structure 310 includes a multi-layered defining film layer 3100; the materials of two adjacent defining film layers are different.

[0159] For further reference, Figure 8 and Fig. 9 As shown, the first pixel defining structure 310 includes a multi-layered defining film layer 3100, and the defining film layers 3100 on the adjacent two sides are made of different materials, for example, the defining film layer 3101 is made of silicon oxide, and the defining film layer 3102 is made of silicon nitride. When different materials are used to prepare the film layers, when etching, considering that different materials have different etching rates, under the same etching conditions, the first groove 312b can be formed because the etching degree of the defining film layer 3101 is less than that of the defining film layer 3102.

[0160] Fig.16 is a flow chart of a fourth method for preparing a display panel provided by an embodiment of the present invention, Fig.17 is a schematic diagram of the process of preparing the second display panel provided by an embodiment of the present invention, with reference to Fig.16 and Fig.17 As shown, the method for preparing the display panel further includes:

[0161] S410, preparing a driving substrate.

[0162] Specifically, refer to Fig.17 In step a, a driving substrate 100 is prepared.

[0163] S420, preparing a reflective electrode layer on one side of the driving substrate.

[0164] Specifically, refer to Fig.17 In step b, a reflective electrode layer 410 is prepared on one side of the driving substrate 100 .

[0165] S430, preparing a second etching protection structure on a side of the reflective electrode layer away from the driving substrate and in a portion of the first electrode arrangement area.

[0166] Specifically, refer to Fig.17 In step c, a second etching protection structure 420 is formed on a side of the reflective electrode layer 410 away from the driving substrate 100 and in a portion of the first electrode arrangement area.

[0167] S440 , preparing at least one auxiliary electrode layer on a side of the second etching protection structure away from the driving substrate.

[0168] Specifically, refer to Fig.17 In step d, at least one auxiliary electrode layer 430 is formed on a side of the second etching protection structure 420 away from the driving substrate 100 .

[0169] S450, preparing a first etching protection structure on a side of the auxiliary electrode layer away from the driving substrate and in the remaining area where the first electrode is disposed.

[0170] Specifically, refer to Fig.17 In step e and step f, a first etching protection structure 440 is formed on a side of the auxiliary electrode layer 420 away from the driving substrate 100 and in the remaining area where the first electrode is disposed.

[0171] S460, etching the reflective electrode layer through the second etching protection structure, and etching the reflective electrode layer and the auxiliary electrode layer through the first etching protection structure to obtain the reflective electrode and the auxiliary electrode located in the setting area of ​​the first electrode.

[0172] Specifically, refer to Fig.17 In step g, the reflective electrode layer 410 is etched through the second etching protection structure 440, and the reflective electrode layer 410 and the auxiliary electrode layer 430 are etched through the first etching protection structure 420 to obtain the reflective electrode 211 and the auxiliary electrode 212 located in the setting area of ​​the first electrode.

[0173] S470 , preparing a second pixel defining layer, wherein the second pixel defining layer covers the etching protection structure and contacts and covers the planarization layer between two adjacent etching protection structures.

[0174] Specifically, refer to Fig.17 In step h, a second pixel defining layer 450 is prepared, and the second pixel defining layer 450 completely covers the first etch protection structure 440 , the second etch protection structure 420 , and the planarization layer 105 between the first etch protection structure 440 and the second etch protection structure 420 .

[0175] S480 , patterning the second pixel defining layer, and preparing a first pixel opening portion in the second pixel defining layer.

[0176] Specifically, refer to Fig.17 In step i, the second pixel defining layer 450 is pattern-etched, and a first pixel opening portion 451 is prepared. The first pixel opening portion 451 exposes a portion of the first etching protection structure 440 and also exposes a portion of the second etching protection structure 420.

[0177] S490, etching the protective layer through the first pixel opening portion, and preparing a second pixel opening portion in the etching protective layer.

[0178] Specifically, refer to Fig.17 In step j, the etching protection layer is etched. Specifically, the exposed second etching protection structure 420 and the first etching protection structure 440 are etched through the first pixel opening 451, thereby forming a second pixel opening section 452. The first electrode 210 is exposed through the first pixel opening section 451 and the second pixel opening section 452, and the portion of the exposed first electrode 210 can be understood as the pixel opening 311.

[0179] Fig.18 is a flow chart of a fifth method for preparing a display panel provided by an embodiment of the present invention, Fig.19 is a schematic diagram of the process of preparing the third display panel provided by an embodiment of the present invention, with reference to Fig.18 and Fig.19 As shown, the preparation method also includes:

[0180] S510, preparing a driving substrate.

[0181] Specifically, refer to Fig.19 In step a, a driving substrate 100 is prepared.

[0182] S520, preparing a reflective electrode layer on one side of the driving substrate.

[0183] Specifically, refer to Fig.19In step b, a reflective electrode layer 410 is prepared on the driving substrate 100 .

[0184] S530 , preparing a second etching protection structure on a side of the reflective electrode layer away from the driving substrate and in a region where part of the first electrode is disposed.

[0185] Specifically, refer to Fig.19 In step c, a second etching protection structure 420 is formed on a side of the reflective electrode layer 410 away from the driving substrate 100 and in a portion of the first electrode arrangement area.

[0186] S540 , preparing at least one auxiliary electrode layer on a side of the second etching protection structure away from the driving substrate.

[0187] Specifically, refer to Fig.19 In step d, at least one auxiliary electrode layer 430 is formed on a side of the second etching protection structure 420 away from the driving substrate 100 .

[0188] S550 , preparing a first etching protection structure on a side of the auxiliary electrode layer away from the driving substrate and in the remaining area where the first electrode is disposed.

[0189] Specifically, refer to Fig.19 In step e and step f, a first etching protection structure 440 is formed on a side of the auxiliary electrode layer 420 away from the driving substrate 100 and in the remaining area where the first electrode is disposed.

[0190] S560, etching the reflective electrode layer through the second etching protection structure, and etching the reflective electrode layer and the auxiliary electrode layer through the first etching protection structure to obtain the reflective electrode and the auxiliary electrode located in the setting area of ​​the first electrode.

[0191] Specifically, refer to Fig.19 In step g, the reflective electrode layer 410 is etched through the second etching protection structure 440, and the reflective electrode layer 410 and the auxiliary electrode layer 430 are etched through the first etching protection structure 420 to obtain the reflective electrode 211 and the auxiliary electrode 212 located in the setting area of ​​the first electrode.

[0192] S570 , preparing a sacrificial pixel defining layer.

[0193] Specifically, refer to Fig.19 In step h, a sacrificial pixel defining layer 460 is prepared. The sacrificial pixel defining layer 460 completely covers the first etch protection structure 440 , the second etch protection structure 420 , and the planarization layer 105 between the first etch protection structure 440 and the second etch protection structure 420 .

[0194] S580 , patterning the sacrificial pixel defining layer, and preparing a third pixel opening portion in the sacrificial pixel defining layer.

[0195] Specifically, refer to Fig.19 In step i, the sacrificial pixel defining layer 460 is pattern-etched, and a third pixel opening portion 461 is prepared. The third pixel opening portion 461 exposes a portion of the first etching protection structure 440 and also exposes a portion of the second etching protection structure 420.

[0196] S590, etching the protective layer through the third pixel opening portion, and preparing a fourth pixel opening portion in the etching protective layer.

[0197] Specifically, refer to Fig.17 In step j, the etching protection layer is etched. Specifically, the exposed second etching protection structure 420 and the first etching protection structure 440 are etched through the third pixel opening subdivision 461, thereby forming a fourth pixel opening subdivision 462. The first electrode 210 is exposed through the third pixel opening subdivision 461 and the fourth pixel opening subdivision 462, and the portion of the exposed first electrode 210 can be understood as the pixel opening 311.

[0198] S5100, remove the sacrificial pixel limiting structure.

[0199] Specifically, refer to Fig.19 In step k, the remaining sacrificial pixel defining structure 450 is removed.

[0200] S5110, preparing a second pixel defining layer and patterning the second pixel defining layer, and preparing a fifth pixel opening portion in the second pixel defining layer.

[0201] Specifically, refer to Fig.19 In step 1, a second pixel defining layer 450 is prepared, and the second pixel defining layer 450 is laid on the entire surface. Fig.10 As shown in step m, the second pixel defining layer 450 is pattern-etched to form a fifth pixel opening sub-portion 463. The fifth pixel opening sub-portion 463 penetrates the second pixel defining layer 450 located on the side of the first electrode 210 away from the driving substrate 100 to obtain a second pixel defining structure 320; the pixel opening 311 includes a fourth pixel opening sub-portion 462 and a fifth pixel opening sub-portion 463.

[0202] Among them, compared with preparing an opening for the etching protection structure in the opening area of ​​the sacrificial pixel defining structure, preparing an opening for the etching protection structure in the opening area of ​​the second pixel defining layer can avoid affecting the second pixel defining structure when performing the opening process on the etching protection structure. While ensuring a better morphology of the pixel opening, the stability of each structure in the display panel can also be guaranteed.

[0203] Fig. 20is a flow chart of a sixth method for preparing a display panel provided by an embodiment of the present invention, Fig.21 is a schematic diagram of the process for preparing the seventh display panel provided by an embodiment of the present invention, with reference to Fig. 20 and Fig.21 As shown, the method for preparing the display panel further includes:

[0204] S610, preparing a driving substrate.

[0205] Specifically, refer to Fig.21 As shown in step a, a driving substrate 100 is prepared.

[0206] S620, preparing a reflective electrode layer on one side of the driving substrate.

[0207] Specifically, refer to Fig.21 As shown in step b, a reflective electrode layer 410 is prepared on one side of the driving substrate 100 .

[0208] S630, patterning the reflective electrode layer to prepare a plurality of reflective electrodes located in the setting area of ​​the first electrode.

[0209] Specifically, refer to Fig.21 As shown in step c, the reflective electrode layer 410 is pattern-etched to prepare a plurality of reflective electrodes 211 . The arrangement region of the reflective electrodes 211 can be understood as the arrangement region of the first electrode 210 .

[0210] S640, preparing at least one auxiliary electrode layer on a side of the reflective electrode away from the driving substrate.

[0211] Specifically, refer to Fig.21 As shown in step d, at least one auxiliary electrode layer 430 is prepared on the side of the reflective electrode 211 away from the driving substrate 100. Fig.21 Step d in the figure shows that an auxiliary electrode layer 430 is prepared on the side of the reflective electrode 211 away from the driving substrate 100. The number of the auxiliary electrode layers 430 can be adaptively adjusted according to the requirements, and the embodiment of the present invention does not specifically limit this.

[0212] S650 , preparing a first etching protection structure on a side of the auxiliary electrode layer away from the driving substrate and in at least a portion of the area where the first electrode is disposed.

[0213] Specifically, refer to Fig.21As shown in step e, a first etching protection structure 440 is provided in a part of the first electrode setting region, and the first etching protection structure 440 is provided on a side of the auxiliary electrode layer 430 away from the driving substrate 100. The reflective electrode layer 430 can be subsequently etched in a pattern through the first etching protection structure 440, which can be understood as follows: in the first electrode setting region where the first etching protection structure 440 is provided, the auxiliary electrode layer 430 between the first etching protection structure 440 and the driving substrate 100 can be retained, while in the first electrode setting region where the first etching protection structure 440 is not provided, the corresponding auxiliary electrode layer 430 will be removed in the subsequent etching process.

[0214] S660 , etching at least the auxiliary electrode layer through the first etching protection structure.

[0215] Specifically, refer to Fig.21 As shown in step f, for the auxiliary electrode layer 430, the area not covered by the first etching protection structure 440 is removed, and the area covered by the first etching protection structure 440 is retained. The auxiliary electrode layer 430 retained by etching is the auxiliary electrode 212. Fig.21 As shown in step f to step h, different numbers of auxiliary electrode layers 430 can be arranged in different first electrode arrangement regions, and the first etching protection structure 440 can be prepared multiple times, thereby realizing different numbers of auxiliary electrodes 212 in the first electrode arrangement region, such as Fig.21 As shown in step g.

[0216] Furthermore, by gradually preparing the auxiliary electrode 212, the auxiliary electrode 212 can cover the reflective electrode 211; among adjacent auxiliary electrodes 212, the auxiliary electrode 212 on the side away from the driving substrate 100 can cover the auxiliary electrode 212 on the side close to the driving substrate 100. The contact area between the auxiliary electrode 212 and other film layers can be guaranteed, thereby ensuring that the auxiliary electrode 212 is stably arranged on the side of the reflective electrode 211 away from the driving substrate 100. It can be understood that by adjusting the size of the auxiliary electrode 212, the stability of the auxiliary electrode 212 can be guaranteed.

[0217] S670 , removing the first etching protection structure.

[0218] Specifically, refer to Fig.21 As shown in step i, the first etching protection structure 440 is removed, and the reflective electrode 211 and the auxiliary electrode 212 are retained on one side of the driving substrate 100 .

[0219] S680 , preparing a first pixel defining structure between two adjacent first electrodes and on a surface portion of the first electrode away from the driving substrate.

[0220] Specifically, refer to Fig.21 As shown in step j, a first pixel defining structure 310 is prepared, and the first pixel defining structure 310 covers a portion of the surface of the first electrode 210 away from the driving substrate 100, and at the same time, the first pixel defining structure 310 covers the planarization layer 105 between two adjacent first electrodes 210. The first pixel defining structure 310 can be made of an organic material, and the first pixel defining structure 310 raises the area between two adjacent first electrodes 210. When the light-emitting layer is subsequently prepared, the transmission path of the light-emitting layer can be increased, thereby reducing the leakage current between two adjacent light-emitting elements, ensuring the light-emitting effect of the light-emitting element, and thus improving the overall display effect of the display panel 10.

[0221] S690 , preparing a third pixel defining structure on a side of the first pixel defining structure away from the driving substrate.

[0222] Specifically, refer to Fig.21 As shown in step k, a third pixel defining structure 330 is set on the side of the first pixel defining structure 310 away from the driving substrate 310. By setting the third pixel defining structure 330, the overall film thickness can also be increased. After the increase, the extension path of the light-emitting layer 220 in the light-emitting element can be increased, and then the leakage current between two adjacent light-emitting elements can be reduced, thereby ensuring the light-emitting effect of the light-emitting element 200, thereby improving the overall display effect of the display panel 10.

[0223] Furthermore, the third pixel defining structure 330 may also cover the surface and side surface of the first pixel defining structure 310 away from the driving substrate 100. Exemplarily, the material of the third pixel defining structure 330 may be an inorganic material.

[0224] S6100 , preparing a second groove in the second limiting side wall.

[0225] Specifically, refer to Fig.21 As shown in step k, the third pixel defining structure 330 includes a second defining sidewall 331a close to one side of the pixel opening 311, and a second groove 331b is provided in the second defining sidewall 331a, and the second groove 331b is equivalent to the indented area of ​​the second defining sidewall 331a. At least one layer of the multi-layer light-emitting layer 220 prepared subsequently is disconnected at the second groove 331b, which can avoid leakage transmission of holes or electrons between different light-emitting elements, thereby avoiding crosstalk between different light-emitting elements, and ensuring the display effect of the display panel.

[0226] S6110, preparing a multi-layer light-emitting layer on a side of the first electrode away from the driving substrate.

[0227] Specifically, refer to Fig.21As shown in step 1, a multi-layer light-emitting layer 220 is prepared on the side of the first electrode 210 away from the driving substrate 100, and the light-emitting layer 220 is disconnected at the second groove 331b. It can be that at least part of the film layer in the light-emitting layer 220 is disconnected, for example, only the hole injection layer 221 and the hole transport layer 222 are disconnected; or at least the film layer in the light-emitting layer 220 fills the second groove 331b, which is equivalent to adding a transmission path. For the specific disconnection of the film layer in the light-emitting layer 220 in the second groove 331b, the process can be adjusted according to different needs to achieve different film layer disconnection conditions. You can also refer to Figure 5 The display panel 10 shown in FIG. 1 is as follows: Figure 5 It can be understood as the display panel prepared after step k.

[0228] Optional, Fig. 22 is a flow chart of a seventh method for preparing a display panel provided by an embodiment of the present invention, Fig.23 is a schematic diagram of the manufacturing process of the eighth display panel provided by an embodiment of the present invention, with reference to Fig. 22 and Fig.23 As shown, the method for preparing the display panel further includes:

[0229] S710, preparing a driving substrate.

[0230] Specifically, refer to Fig.23 As shown in step a, a driving substrate 100 is prepared.

[0231] S720, preparing a reflective electrode layer on one side of the driving substrate.

[0232] Specifically, refer to Fig.23 As shown in step b, a reflective electrode layer 410 is prepared on one side of the driving substrate 100 .

[0233] S730, patterning the reflective electrode layer to prepare a plurality of reflective electrodes located in the setting area of ​​the first electrode.

[0234] Specifically, refer to Fig.23 As shown in step c, the reflective electrode layer 410 is pattern-etched to prepare a plurality of reflective electrodes 211 . The arrangement region of the reflective electrodes 211 can be understood as the arrangement region of the first electrode 210 .

[0235] S740, preparing at least one auxiliary electrode layer on a side of the reflective electrode away from the driving substrate.

[0236] Specifically, refer to Fig.23 As shown in step d, at least one auxiliary electrode layer 430 is prepared on the side of the reflective electrode 211 away from the driving substrate 100. Fig.23Step d in the figure shows that an auxiliary electrode layer 430 is prepared on the side of the reflective electrode 211 away from the driving substrate 100. The number of the auxiliary electrode layers 430 can be adaptively adjusted according to the requirements, and the embodiment of the present invention does not specifically limit this.

[0237] S750 , preparing a first etching protection structure on a side of the auxiliary electrode layer away from the driving substrate and in at least a portion of the area where the first electrode is disposed.

[0238] Specifically, refer to Fig.23 As shown in step e, a first etching protection structure 440 is provided in a part of the first electrode setting region, and the first etching protection structure 440 is provided on a side of the auxiliary electrode layer 430 away from the driving substrate 100. The reflective electrode layer 430 can be subsequently etched in a pattern through the first etching protection structure 440, which can be understood as follows: in the first electrode setting region where the first etching protection structure 440 is provided, the auxiliary electrode layer 430 between the first etching protection structure 440 and the driving substrate 100 can be retained, while in the first electrode setting region where the first etching protection structure 440 is not provided, the corresponding auxiliary electrode layer 430 will be removed in the subsequent etching process.

[0239] S760, etching at least the auxiliary electrode layer through the first etching protection structure.

[0240] Specifically, refer to Fig.23 As shown in step f, for the auxiliary electrode layer 430, the area not covered by the first etching protection structure 440 is removed, and the area covered by the first etching protection structure 440 is retained. The auxiliary electrode layer 430 retained by etching is the auxiliary electrode 212. Fig.23 As shown in step f to step h, different numbers of auxiliary electrode layers 430 can be arranged in different first electrode arrangement regions, and the first etching protection structure 440 can be prepared multiple times, thereby realizing different numbers of auxiliary electrodes 212 in the first electrode arrangement region, such as Fig.23 As shown in step g.

[0241] Furthermore, by gradually preparing the auxiliary electrode 212, the auxiliary electrode 212 can cover the reflective electrode 211; among adjacent auxiliary electrodes 212, the auxiliary electrode 212 on the side away from the driving substrate 100 can cover the auxiliary electrode 212 on the side close to the driving substrate 100. The contact area between the auxiliary electrode 212 and other film layers can be guaranteed, thereby ensuring that the auxiliary electrode 212 is stably arranged on the side of the reflective electrode 211 away from the driving substrate 100. It can be understood that by adjusting the size of the auxiliary electrode 212, the stability of the auxiliary electrode 212 can be guaranteed.

[0242] S770 , removing the first etching protection structure.

[0243] Specifically, refer to Fig.23 As shown in step i, the first etching protection structure 440 is removed, and the reflective electrode 211 and the auxiliary electrode 212 are retained on one side of the driving substrate 100 .

[0244] S780, preparing a first pixel defining structure between two adjacent first electrodes and on a portion of the surface of the first electrode away from the driving substrate.

[0245] Specifically, refer to Fig.23 As shown in step j, a first pixel defining structure 310 is prepared between two adjacent first electrodes 210 and on a portion of the surface of the first electrode 210 away from the driving substrate 100, wherein the material of the first pixel defining structure 310 may be an inorganic material. Further, the first pixel defining structure 310 includes a first defining sidewall 312a close to one side of the pixel opening 311, and includes a first groove 312b on the first defining side edge 312a, and the first groove 312b is equivalent to the sunken area of ​​the first defining side edge 312a. At least one of the multiple light-emitting layers 220 in the light-emitting element can be disconnected at the first groove 312b, which can avoid leakage transmission of holes or electrons between different light-emitting elements 200, thereby avoiding crosstalk between different light-emitting elements 200, and ensuring the display effect of the display panel 10.

[0246] S790 , preparing a third pixel defining structure on a side of the first pixel defining structure away from the driving substrate.

[0247] refer to Fig.23 As shown in step k, a third pixel defining structure 330 is prepared on the side of the first pixel defining structure 310 away from the driving substrate 100. By setting the third pixel defining structure 330, the overall film thickness can also be increased, and after the increase, the extension path of the light-emitting layer 220 in the light-emitting element can be increased, thereby reducing the leakage current between two adjacent light-emitting elements, ensuring the light-emitting effect of the light-emitting element 200, and thus improving the overall display effect of the display panel 10. Exemplarily, the material of the third pixel defining structure 330 can be an organic material.

[0248] S7100 , preparing a multi-layer light-emitting layer on a side of the first electrode away from the driving substrate.

[0249] refer to Fig.23As shown in step i, a multi-layer light-emitting layer 220 is prepared on the side of the first electrode 210 away from the driving substrate 100, and the light-emitting layer 220 is disconnected at the second groove 331b. It can be that at least part of the film layer in the light-emitting layer 220 is disconnected, for example, only the hole injection layer 221 and the hole transport layer 222 are disconnected; or at least the film layer in the light-emitting layer 220 fills the second groove 331b, which is equivalent to adding a transmission path. For the specific disconnection of the film layer in the light-emitting layer 220 in the second groove 331b, the process can be adjusted according to different needs to achieve different film layer disconnection conditions. You can also refer to Figure 4 The display panel 10 shown in FIG. 1 is as follows: Figure 4 It can be understood as the display panel prepared after step k.

[0250] Based on the same inventive concept, an embodiment of the present invention further provides a display device, Fig.24 is a schematic diagram of the structure of a display device provided by an embodiment of the present invention, such as Fig.24 As shown, the display device 1 includes the display panel 10 described in any of the above embodiments. Therefore, the display device 1 provided in the embodiment of the present invention has the corresponding beneficial effects of the above embodiments, which will not be repeated here. The display device 1 can be an electronic device such as a mobile phone, a computer, a smart wearable device (for example, a smart watch), and a car display device.

[0251] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: It includes a driving substrate and a plurality of light-emitting elements located on one side of the driving substrate, and different light-emitting elements have different light-emitting colors; The light-emitting element includes a first electrode, the first electrode includes a reflective electrode, and at least part of the first electrode also includes at least one layer of auxiliary electrode; the reflective electrode is electrically connected to the driving circuit in the driving substrate, and the auxiliary electrode is located on a side of the reflective electrode away from the driving substrate; and the thickness of the auxiliary electrode in the light-emitting elements with different light output colors is different.

2. The display panel according to claim 1, characterized in that: The light-emitting elements with different light-emitting colors include a first light-emitting element and a second light-emitting element; the first light-emitting element includes a red light-emitting element or a green light-emitting element, and the second light-emitting element includes a blue light-emitting element; or, the first light-emitting element includes a red light-emitting element, and the second light-emitting element includes a green light-emitting element or a blue light-emitting element; The number of layers of the auxiliary electrode in the first light-emitting element is greater than the number of layers of the auxiliary electrode in the second light-emitting element.

3. The display panel according to claim 1, characterized in that: The plurality of light emitting elements include a third light emitting element, and the third light emitting element includes at least one layer of the auxiliary electrode; The area of ​​the auxiliary electrode is S1, and the area of ​​the reflective electrode is S2, wherein |S1-S2| / S1≤10%.

4. The display panel according to claim 3, characterized in that: The plurality of light-emitting elements include a fourth light-emitting element, the fourth light-emitting element includes at least two layers of auxiliary electrodes stacked, and the at least two layers of auxiliary electrodes include a first auxiliary electrode and a second auxiliary electrode; The area of ​​the first auxiliary electrode is S3, and the area of ​​the second auxiliary electrode is S4, wherein |S3-S4| / S3≤10%.

5. The display panel according to claim 1, characterized in that: The plurality of light emitting elements include a fifth light emitting element, and the fifth light emitting element includes at least one layer of the auxiliary electrode; The auxiliary electrode covers an upper surface of the reflective electrode at a side away from the driving substrate and a side surface connected to the upper surface.

6. The display panel according to claim 5, characterized in that: The plurality of light-emitting elements include a sixth light-emitting element, the sixth light-emitting element includes at least two layers of the auxiliary electrodes stacked, the at least two layers of the auxiliary electrodes include a third auxiliary electrode and a fourth auxiliary electrode, and the fourth auxiliary electrode is located on a side of the third auxiliary electrode away from the drive substrate; The fourth auxiliary electrode covers an upper surface of the third auxiliary electrode at a side away from the driving substrate and a side surface connected to the upper surface.

7. The display panel according to claim 1, characterized in that: The display panel further includes a first pixel defining structure at least partially located on a side of the first electrode away from the driving substrate, wherein a pixel opening is provided in the first pixel defining structure, and the pixel opening penetrates the first pixel defining structure and exposes at least a portion of the first electrode; The first pixel defining structure covers a portion of an upper surface of the first electrode that is away from the driving substrate.

8. The display panel according to claim 7, characterized in that: The first pixel definition structure includes a plurality of independently arranged pixel definition substructures, and the pixel definition substructures correspond to the light emitting elements; The pixel defining substructure covers a portion of the upper surface of the first electrode in the light-emitting element corresponding thereto, which is away from the driving substrate, and the orthographic projection of the pixel defining substructure on the plane where the driving substrate is located is located within the orthographic projection of the first electrode in the light-emitting element corresponding thereto on the plane where the driving substrate is located.

9. The display panel according to claim 8, characterized in that: The display panel further includes a second pixel defining structure; The driving substrate comprises a planarization layer, and the first electrode is located at a side of the planarization layer away from the driving circuit; The second pixel defining structure covers at least a portion of a surface of the first pixel defining structure on a side away from the driving substrate, and contacts and covers the planarization layer between two adjacent pixel defining substructures.

10. The display panel according to claim 9, characterized in that: The first pixel-defining structure includes an inorganic pixel-defining structure, and the second pixel-defining structure includes an organic pixel-defining structure.

11. The display panel according to claim 7, characterized in that: The driving substrate comprises a planarization layer, and the first electrode is located at a side of the planarization layer away from the driving circuit; The first pixel defining structure also contacts and covers the planarization layer between two adjacent first electrodes.

12. The display panel according to claim 11, characterized in that: The display panel further includes a third pixel defining structure; The third pixel defining structure is located on a side of the first pixel defining structure away from the driving substrate, and covers at least a portion of the first pixel defining structure.

13. The display panel according to claim 7, characterized in that: The first pixel defining structure includes a first defining side wall close to one side of the pixel opening, a first groove is arranged in the first defining side wall, and the first groove penetrates a part of the first defining side wall; The light emitting element further comprises a plurality of light emitting layers located on a side of the first electrode away from the driving substrate, and at least one layer of the light emitting layer is disconnected at the position of the first groove.

14. The display panel according to claim 12, characterized in that: The first pixel defining structure comprises an organic pixel defining structure, and the third pixel defining structure comprises an inorganic pixel defining structure; The third pixel defining structure covers the surface and side of the first pixel defining structure away from the driving substrate; The third pixel defining structure includes a second defining sidewall close to one side of the pixel opening, a second groove is disposed in the second defining sidewall, and the second groove partially penetrates the second defining sidewall.

15. The display panel according to claim 1, characterized in that: The display panel further includes an organic pixel defining structure, and along a thickness direction of the display panel, the organic pixel defining structure at least overlaps a gap between two adjacent first electrodes; The thickness of the organic pixel defining structure is greater than or equal to the thickness of the first electrode.

16. The display panel according to claim 13, characterized in that: The light-emitting elements with different light emission colors include a first light-emitting element and a second light-emitting element; The thickness of the organic pixel defining structure arranged corresponding to the first light emitting element is the same as the thickness of the organic pixel defining structure arranged corresponding to the second light emitting element.

17. The display panel according to claim 1, characterized in that: The light-emitting elements having auxiliary electrodes include a seventh light-emitting element and an eighth light-emitting element; The thickness of the auxiliary electrode in the seventh light-emitting element is D1, and the thickness of the auxiliary electrode in the eighth light-emitting element is D2; Among them, (n+1) / n≤D1 / D2≤(n+1) / 1; n is a positive number.

18. A method for preparing a display panel, characterized in that: The display panel includes a plurality of light emitting elements, and different light emitting elements have different light emitting colors; The preparation method comprises: preparing a driving substrate; A first electrode is prepared on one side of the driving substrate, the first electrode includes a reflective electrode, and at least part of the first electrode also includes at least one layer of auxiliary electrode; the reflective electrode is electrically connected to the driving substrate, and the auxiliary electrode is located on a side of the reflective electrode away from the driving substrate; and the thickness of the auxiliary electrode is different in the light-emitting elements with different light output colors.

19. The preparation method according to claim 18, characterized in that: A first electrode is prepared on one side of the driving substrate, comprising: Prepare a reflective electrode layer on one side of the driving substrate; At least one auxiliary electrode layer and a first etching protection structure are prepared on a side of the reflective electrode layer away from the driving substrate, wherein the etching protection structure is located in at least a portion of the setting area of ​​the first electrode; At least the auxiliary electrode layer is etched through the first etching protection structure.

20. The preparation method according to claim 19, characterized in that: Before preparing at least one auxiliary electrode layer and a first etching protection structure on a side of the reflective electrode layer away from the driving substrate, the method further includes: A second etching protection structure is prepared on a side of the reflective electrode layer away from the driving substrate and in a part of the area where the first electrode is disposed; At least one auxiliary electrode layer and a first etching protection structure are prepared on a side of the reflective electrode layer away from the driving substrate, comprising: preparing at least one auxiliary electrode layer on a side of the second etching protection structure away from the driving substrate; A first corrosion protection structure is prepared on a side of the auxiliary electrode layer away from the driving substrate and in the remaining area where the first electrode is disposed; Etching at least the auxiliary electrode layer through the first etching protection structure includes: The reflective electrode layer is etched through the second etching protection structure, and the reflective electrode layer and the auxiliary electrode layer are etched through the first etching protection structure to obtain the reflective electrode and the auxiliary electrode located in the setting area of ​​the first electrode.

21. The preparation method according to claim 20, characterized in that: After etching the reflective electrode layer through the second etching protection structure, and etching the reflective electrode layer and the auxiliary electrode layer through the first etching protection structure, the method further includes: A pixel opening is prepared in the etching protection structure, and the etching protection structure is reused as a first pixel defining structure that defines a light emitting area of ​​the light emitting element.

22. The preparation method according to claim 21, characterized in that: The driving substrate comprises a planarization layer, and the first electrode is located at a side of the planarization layer away from the driving circuit; Preparing a pixel opening in the etching protection structure includes: preparing a second pixel defining layer, wherein the second pixel defining layer covers the etching protection structure and contacts and covers the planarization layer between two adjacent etching protection structures; Patterning the second pixel defining layer, preparing a first pixel opening section in the second pixel defining layer, wherein the first pixel opening section penetrates the second pixel defining layer located on a side of the etching protection structure away from the driving substrate, to obtain the second pixel defining structure; The etching protection layer is etched through the first pixel opening section to prepare a second pixel opening section in the etching protection layer; the pixel opening includes the first pixel opening section and the second pixel opening section.

23. The preparation method according to claim 21, characterized in that: The driving substrate comprises a planarization layer, and the first electrode is located at a side of the planarization layer away from the driving circuit; Preparing a pixel opening in the etching protection structure includes: preparing a sacrificial pixel defining layer, wherein the sacrificial pixel defining layer covers the etching protection structure and contacts and covers the planarization layer between two adjacent etching protection structures; Patterning the sacrificial pixel defining layer, preparing a third pixel opening section in the sacrificial pixel defining layer, wherein the third pixel opening section penetrates the sacrificial pixel defining layer located on a side of the etching protection structure away from the driving substrate, to obtain the sacrificial pixel defining structure; Etching the etching protection layer through the third pixel opening section to prepare a fourth pixel opening section in the etching protection layer; removing the sacrificial pixel defining structure; A second pixel defining layer is prepared and patterned, and a fifth pixel opening portion is prepared in the second pixel defining layer, wherein the fifth pixel opening portion penetrates the second pixel defining layer located on a side of the first electrode away from the driving substrate, to obtain the second pixel defining structure; the pixel opening includes the fourth pixel opening portion and the fifth pixel opening portion.

24. The preparation method according to claim 21, characterized in that: The first pixel defining structure includes a first defining sidewall close to one side of the pixel opening; The preparation method further comprises: preparing a first groove in the first limiting side wall, wherein the first groove penetrates a portion of the first limiting side wall; A plurality of light-emitting layers are prepared on a side of the first electrode away from the driving substrate, and at least one of the light-emitting layers is disconnected at the position of the first groove.

25. The preparation method according to claim 24, characterized in that: The first pixel defining structure includes a defining film layer arranged in a multi-layer stack; The two adjacent limiting film layers are made of different materials.

26. The preparation method according to claim 19, characterized in that: Before preparing at least one auxiliary electrode layer and a first etching protection structure on a side of the reflective electrode layer away from the driving substrate, the method further includes: Patterning the reflective electrode layer to prepare a plurality of reflective electrodes located in the arrangement area of ​​the first electrode; At least one auxiliary electrode layer and a first etching protection structure are prepared on a side of the reflective electrode layer away from the driving substrate, comprising: At least one auxiliary electrode layer is prepared on a side of the reflective electrode away from the driving substrate; A first etching protection structure is prepared on a side of the auxiliary electrode layer away from the driving substrate and in at least a portion of the area where the first electrode is disposed.

27. The preparation method according to claim 26, characterized in that: After etching at least the auxiliary electrode layer through the first etching protection structure, the method further includes: removing the first etching protection structure; A first pixel defining structure is formed between two adjacent first electrodes and on a portion of the surface of the first electrode away from the driving substrate.

28. The preparation method according to claim 27, characterized in that: After preparing a first pixel defining structure between two adjacent first electrodes and on a portion of the surface of the first electrode away from the driving substrate, the method further includes: A third pixel defining structure is prepared on a side of the first pixel defining structure away from the driving substrate, and the third pixel defining structure covers at least a portion of the first pixel defining structure.

29. The preparation method according to claim 28, characterized in that: The first pixel defining structure comprises an organic pixel defining structure, and the third pixel defining structure comprises an inorganic pixel defining structure; The third pixel defining structure covers the surface and side of the first pixel defining structure away from the driving substrate, and the third pixel defining structure includes a second defining side wall close to the pixel opening; After preparing a third pixel defining structure on a side of the first pixel defining structure away from the driving substrate, the method further includes: preparing a second groove in the second limiting side wall, wherein the second groove penetrates a portion of the second limiting side wall; A plurality of light-emitting layers are prepared on a side of the first electrode away from the driving substrate, and at least one of the light-emitting layers is disconnected at the position of the second groove.

30. A display device, characterized in that: A display panel comprising any one of claims 1-17.

Images