Display panel, preparation method thereof and display device

Abstract

The invention relates to a display panel, a preparation method thereof and a display device, the display panel comprises a substrate and a light-emitting unit group, and the light-emitting unit group is arranged on one side of the substrate. The light-emitting unit group comprises a first electrode, a first light-emitting layer, a first transparent electrode, a first packaging layer, a second transparent electrode, a second light-emitting layer, a third transparent electrode, a second packaging layer, a fourth transparent electrode, a third light-emitting layer, a fifth transparent electrode and a third packaging layer which are stacked in the direction away from the substrate. The first light-emitting layer, the second light-emitting layer and the third light-emitting layer are respectively used for emitting light of different colors, the light-emitting unit groups in the application can save 2 / 3 of the occupied area, and the number of the light-emitting unit groups in unit area can be three times that of the traditional technology, so that the pixel density is improved by three times, and the high-resolution requirement can be met.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a preparation method thereof, and a display device. Background Art

[0002] With the advancement of science and technology and the development of AR (Augmented Reality) / VR (Virtual Reality) technology, building a metaverse digital living space is no longer a dream. As the most important interactive technology in AR / VR technology, display technology has received more and more attention. Among the related technologies, the display screen uses silicon-based WOLED technology. In silicon-based WOLED technology, red, green and blue pixels are arranged horizontally in sequence, and the light emitted by the three color pixels is filtered through a filter to generate the target color. However, the pixel density of the display screen made using silicon-based WOLED technology is low, which is difficult to meet high-resolution requirements. Summary of the invention

[0003] Based on this, it is necessary to provide a display panel and a manufacturing method thereof, and a display device that can improve the pixel density of the display screen in order to address the above problems.

[0004] A display panel, comprising:

[0005] substrate; and

[0006] A light-emitting unit group is arranged on one side of the substrate; the light-emitting unit group includes a first light-emitting unit, a first encapsulation layer, a second light-emitting unit, a second encapsulation layer, a third light-emitting unit and a third encapsulation layer stacked in a direction away from the substrate, the first light-emitting unit includes a first electrode, a first light-emitting layer, and a first transparent electrode stacked in a direction away from the substrate, the second light-emitting unit includes a second transparent electrode, a second light-emitting layer, and a third transparent electrode stacked in a direction away from the substrate, and the third light-emitting unit includes a fourth transparent electrode, a third light-emitting layer, and a fifth transparent electrode stacked in a direction away from the substrate;

[0007] The first light-emitting layer, the second light-emitting layer and the third light-emitting layer are used to emit light of different colors respectively.

[0008] In one embodiment, the center of the first light-emitting layer, the center of the second light-emitting layer and the center of the third light-emitting layer coincide with each other;

[0009] Optionally, an orthographic projection of the first light-emitting layer on the substrate, an orthographic projection of the second light-emitting layer on the substrate, and an orthographic projection of the third light-emitting layer on the substrate overlap.

[0010] In one embodiment, the display panel further includes a first auxiliary electrode, and the first auxiliary electrode is disposed on a side of the substrate close to the light-emitting unit group;

[0011] The first transparent electrode, the third transparent electrode and the fifth transparent electrode are all electrically connected to the first auxiliary electrode.

[0012] In one embodiment, the display panel further includes a pixel defining layer, and the pixel defining layer is disposed on a side of the substrate close to the light emitting unit group;

[0013] A pixel opening is provided on the pixel definition layer, and at least a portion of the light emitting unit group is provided in the pixel opening;

[0014] Optionally, the first auxiliary electrode is disposed between the pixel defining layer and the substrate.

[0015] In one embodiment, a first via hole is provided on the pixel defining layer, and the first transparent electrode passes through the first via hole and is electrically connected to the first auxiliary electrode;

[0016] Optionally, a second via hole is provided on the first encapsulation layer, and the third transparent electrode passes through the second via hole to be electrically connected to the first transparent electrode;

[0017] Optionally, a third via hole is provided on the second encapsulation layer, and the fifth transparent electrode passes through the third via hole to be electrically connected to the third transparent electrode.

[0018] In one embodiment, the edge of the first transparent electrode is separated from the first electrode by means of the first light emitting layer and the pixel defining layer;

[0019] and / or, an edge of the third transparent electrode is separated from the second transparent electrode by means of the second light-emitting layer and the second encapsulation layer;

[0020] And / or, an edge of the fifth transparent electrode is separated from the fourth transparent electrode by means of the third light-emitting layer and the third encapsulation layer.

[0021] In one embodiment, the display panel further includes a second auxiliary electrode, and the second transparent electrode is electrically connected to the second auxiliary electrode;

[0022] Optionally, the display panel further includes a third auxiliary electrode, and the fourth transparent electrode is electrically connected to the third auxiliary electrode;

[0023] Optionally, the second auxiliary electrode, the third auxiliary electrode and the first electrode are arranged in the same layer.

[0024] In one of the embodiments, the first electrode is configured as a light reflecting electrode.

[0025] The present application also provides a display device, comprising the aforementioned display panel.

[0026] The present application also proposes a method for preparing a display panel, comprising:

[0027] providing a substrate;

[0028] forming a light emitting unit group on one side of the substrate;

[0029] The light-emitting unit group includes a first light-emitting unit, a first encapsulation layer, a second light-emitting unit, a second encapsulation layer, a third light-emitting unit and a third encapsulation layer which are stacked in a direction away from the substrate; the first light-emitting unit includes a first electrode, a first light-emitting layer and a first transparent electrode which are stacked in a direction away from the substrate; the second light-emitting unit includes a second transparent electrode, a second light-emitting layer and a third transparent electrode which are stacked in a direction away from the substrate; the third light-emitting unit includes a fourth transparent electrode, a third light-emitting layer and a fifth transparent electrode which are stacked in a direction away from the substrate; wherein the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are respectively used to emit light of different colors.

[0030] In traditional display screen technology, three types of pixels, namely red light-emitting units, green light-emitting units and blue light-emitting units, are arranged horizontally to form light-emitting unit groups. The area of ​​each light-emitting unit group is equal to the sum of the areas of the red light-emitting units, the green light-emitting units and the blue light-emitting units. In the horizontal direction, the sum of the sizes of the red light-emitting units, the green light-emitting units and the blue light-emitting units is equal to the size of the light-emitting unit group. There is a spacing of two pixels between any two adjacent light-emitting unit groups that emit light of the same color. For example, a green light-emitting unit and a blue light-emitting unit are arranged between two red light-emitting units in two adjacent light-emitting unit groups.

[0031] In the display panel and its preparation method and display device provided in the present embodiment, the first electrode, the first light-emitting layer and the first transparent electrode constitute a first light-emitting unit, the second transparent electrode, the second light-emitting layer and the third transparent electrode constitute a second light-emitting unit, and the fourth transparent electrode, the third light-emitting layer and the fifth transparent electrode constitute a third light-emitting unit. The first light-emitting unit, the second light-emitting unit and the third light-emitting unit are stacked to form a light-emitting unit group, and the area of ​​the light-emitting unit group is equal to the area of ​​the first light-emitting unit, the area of ​​the second light-emitting unit or the area of ​​the third light-emitting unit. In the horizontal direction, the two light-emitting units emitting the same color of light in any two adjacent light-emitting unit groups are adjacent, for example, the two first light-emitting units in the two adjacent light-emitting unit groups are adjacent. Compared with the light-emitting unit group composed of the horizontal arrangement of red, green and blue pixels in the traditional display technology, the light-emitting unit group in the present application can save 2 / 3 of the occupied area. Within a unit area, the number of light-emitting unit groups can be 3 times that of the traditional technology, thereby increasing the pixel density by 3 times, which is conducive to meeting the high-resolution requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel in an embodiment of the present application.

[0034] Figure 2 for Figure 1 The schematic diagram shows a comparison between the working effects of the display panel shown and the traditional display panel.

[0035] Figure 3 for Figure 1 The cross-sectional structure diagram of the display panel when the first encapsulation layer is prepared is shown.

[0036] Figure 4 for Figure 3 The cross-sectional structure diagram of the display panel when the first encapsulation layer is patterned is shown.

[0037] Figure 5 for Figure 1 The cross-sectional structure diagram of the display panel after the second encapsulation layer is prepared is shown.

[0038] Figure 6 for Figure 1 A cross-sectional schematic diagram of a first electrode and a first transparent electrode isolation structure in a display panel is shown.

[0039] Figure 7 for Figure 1 The cross-sectional schematic diagram of the isolation structure between the second transparent electrode and the third transparent electrode in the display panel is shown.

[0040] Figure 8 For Figure 7 A schematic cross-sectional view of the structure of the first encapsulation layer and the second encapsulation layer in the display panel is shown.

[0041] Fig. 9 for Figure 1 The cross-sectional schematic diagram of the isolation structure between the fourth transparent electrode and the fifth transparent electrode in the display panel is shown.

[0042] Fig.10 for Fig. 9 A schematic cross-sectional view of the third encapsulation layer structure in the display panel is shown.

[0043] Fig.11 for Figure 1 A schematic diagram of the connection structure between the second transparent electrode and the second auxiliary electrode in the display panel is shown.

[0044] Fig.12 for Figure 1 The figure shows a schematic diagram of the connection structure between the fourth transparent electrode and the third auxiliary electrode in the display panel.

[0045] Fig.13 for Figure 1 A flowchart of a method for preparing a display panel is shown.

[0046] Fig.14 for Figure 1 A schematic diagram of the preparation process of the display panel is shown.

[0047] Fig.15 for Fig.14 A schematic diagram of the structures of the first transparent electrode, the third transparent electrode and the fifth transparent electrode in the preparation process of the display panel is shown.

[0048] Fig.16 for Fig.15 Schematic diagram comparing the packaging effects of the display panel structure shown in and the traditional display panel structure.

[0049] Reference numerals:

[0050] Display panel 100;

[0051] substrate1000;

[0052] Light-emitting unit group 2000, first electrode 2010, first light-emitting layer 2020, first transparent electrode 2030, first transparent electrode portion 2031, second transparent electrode portion 2032, first transparent area 2033, first through hole 2034, first encapsulation layer 2040, second via hole 2041, fourth via hole 2042, fifth via hole 2043, first connecting electrode 2044, first encapsulation portion 2045, second encapsulation portion 2046, second transparent electrode 2050, second light-emitting layer 2060, third transparent electrode 2070, second transparent area 2071, second through hole 2072, second encapsulation layer 2080, third through hole 2081, sixth through hole 2082, second connection electrode 2083, third encapsulation part 2084, fourth encapsulation part 2085, fifth encapsulation part 2086, fourth transparent electrode 2090, third light emitting layer 2100, fifth transparent electrode 2110, third transparent area 2111, third through hole 2112, third encapsulation layer 2120, sixth encapsulation part 2121, seventh encapsulation part 2122;

[0053] Pixel defining layer 3000, pixel opening 3010, first via hole 3020;

[0054] Driver layer 4000;

[0055] A first auxiliary electrode 5000;

[0056] A second auxiliary electrode 6000;

[0057] A third auxiliary electrode 7000;

[0058] Packaging structure 8000;

[0059] Electrode layer 9000. DETAILED DESCRIPTION

[0060] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0061] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0062] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0064] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0066] See also Figure 1 , Figure 1 A schematic structural diagram of a display panel in an embodiment of the present application is shown. The display panel 100 provided in an embodiment of the present application includes: a substrate 1000 and a light-emitting unit group 2000. The light-emitting unit group 2000 is arranged on one side of the substrate 1000. The light-emitting unit group 2000 includes a first light-emitting unit (not marked in the figure), a first encapsulation layer 2040, a second light-emitting unit (not marked in the figure), a second encapsulation layer 2080, a third light-emitting unit (not marked in the figure) and a third encapsulation layer 2120 stacked in a direction away from the substrate 1000. The first light-emitting unit includes a first electrode 2010, a first light-emitting layer 2020, and a first transparent electrode 2030 stacked in a direction away from the substrate 1000. The second light-emitting unit includes a second transparent electrode 2050, a second light-emitting layer 2060, and a third transparent electrode 2070 stacked in a direction away from the substrate 1000. The third light-emitting unit includes a fourth transparent electrode 2090, a third light-emitting layer 2100, and a fifth transparent electrode 2110 stacked in a direction away from the substrate 1000, wherein the first light-emitting layer 2020, the second light-emitting layer 2060 and the third light-emitting layer 2100 are respectively used to emit light of different colors.

[0067] In traditional display screen technology, three pixels, namely, a red light-emitting unit (not shown), a green light-emitting unit (not shown), and a blue light-emitting unit (not shown), are arranged horizontally to form a light-emitting unit group (not shown). The area of ​​each light-emitting unit group is equal to the sum of the area of ​​the red light-emitting unit, the area of ​​the green light-emitting unit, and the area of ​​the blue light-emitting unit. In the horizontal direction, the sum of the size of the red light-emitting unit, the size of the green light-emitting unit, and the size of the blue light-emitting unit is the size of the light-emitting unit group. There is a spacing of two pixels between any two adjacent light-emitting unit groups that emit light of the same color. For example, a green light-emitting unit and a blue light-emitting unit are arranged between two red light-emitting units in two adjacent light-emitting unit groups.

[0068] In this embodiment, the first electrode 2010, the first light-emitting layer 2020 and the first transparent electrode 2030 constitute a first light-emitting unit, the second transparent electrode 2050, the second light-emitting layer 2060 and the third transparent electrode 2070 constitute a second light-emitting unit, and the fourth transparent electrode 2090, the third light-emitting layer 2100 and the fifth transparent electrode 2110 constitute a third light-emitting unit. The first light-emitting unit, the second light-emitting unit and the third light-emitting unit are stacked to form a light-emitting unit group 2000, and the area of ​​the light-emitting unit group 2000 is equal to the area of ​​the first light-emitting unit, the area of ​​the second light-emitting unit or the area of ​​the third light-emitting unit. In the horizontal direction, the two light-emitting units emitting the same color of light in any two adjacent light-emitting unit groups 2000 are adjacent, for example, the two first light-emitting units in two adjacent light-emitting unit groups 2000 are adjacent. Compared with the light-emitting unit group composed of horizontally arranged red, green and blue pixels in traditional display technology, the light-emitting unit group 2000 in the present application can save 2 / 3 of the occupied area. Within a unit area, the number of light-emitting unit groups 2000 can be 3 times that of traditional technology, thereby increasing the pixel density by 3 times, which is conducive to meeting high-resolution requirements.

[0069] In addition, by stacking the first light-emitting unit, the second light-emitting unit and the third light-emitting unit, each light-emitting unit can be driven separately to achieve color display without CF conversion.

[0070] It should be further explained that the first encapsulation layer 2040 can protect the stacked first electrode 2010, the first light-emitting layer 2020 and the first transparent electrode 2030 to improve the reliability of the first light-emitting unit; the second encapsulation layer 2080 can protect the stacked second transparent electrode 2050, the second light-emitting layer 2060 and the third transparent electrode 2070 to improve the reliability of the second light-emitting unit; the third encapsulation layer 2120 can protect the stacked fourth transparent electrode 2090, the third light-emitting layer 2100 and the fifth transparent electrode 2110 to improve the reliability of the third light-emitting unit.

[0071] In some embodiments, the first encapsulation layer 2040, the second encapsulation layer 2080, and the third encapsulation layer 2120 all have high light transmittance. For example, the light transmittance of the first encapsulation layer 2040, the second encapsulation layer 2080, and the third encapsulation layer 2120 may be greater than 80%.

[0072] In some embodiments, the second light emitting layer 2060 and the third light emitting layer 2100 both have high light transmittance. For example, the light transmittance of the second light emitting layer 2060 and the third light emitting layer 2100 may be greater than 80%.

[0073] In some embodiments, a packaging structure 8000 is disposed on a side of the third packaging layer 2120 away from the second packaging layer 2080, and the packaging structure 8000 has a high light transmittance. For example, the light transmittance of the packaging structure 8000 may be greater than 80%.

[0074] In some embodiments, the first light-emitting layer 2020, the second light-emitting layer 2060 and the third light-emitting layer 2100 can emit red light, green light and blue light respectively. In a specific example, the first light-emitting layer 2020 is used to emit red light, the second light-emitting layer 2060 is used to emit green light, and the third light-emitting layer 2100 is used to emit blue light.

[0075] See also Figure 1 In some embodiments, the center of the first light-emitting layer 2020 , the center of the second light-emitting layer 2060 , and the center of the third light-emitting layer 2100 coincide with each other.

[0076] In this embodiment, by coinciding the centers of the first light-emitting layer 2020 , the second light-emitting layer 2060 , and the third light-emitting layer 2100 , when the light-emitting unit group 2000 emits white light, the emitted white light will not have color fringing.

[0077] In some embodiments, the orthographic projection of the first light emitting layer 2020 on the substrate 1000 , the orthographic projection of the second light emitting layer 2060 on the substrate 1000 , and the orthographic projection of the third light emitting layer 2100 on the substrate 1000 coincide with each other.

[0078] The orthographic projection of the first light-emitting layer 2020 on the substrate 1000, the orthographic projection of the second light-emitting layer 2060 on the substrate 1000, and the orthographic projection of the third light-emitting layer 2100 on the substrate 1000 overlap. In this way, at the center and edge of the light-emitting unit group 2000, the light emitted by the light-emitting unit group 2000 is relatively uniform, so that the continuity during display is better, which is conducive to preventing the edges of each light-emitting unit from having uneven jaggedness.

[0079] like Figure 2 FIG. 1 is a schematic diagram showing a comparison of the working effects of the display panel 100 in the present application and a conventional display panel, wherein Figure 2 (a) is a schematic diagram of the pixel arrangement of a traditional display panel. Figure 2 (b) is a schematic diagram of the synthetic white light effect of a traditional display panel. The results show that the synthetic white light area is small and uneven, and the synthetic white light has color fringing. Figure 2 (c) is a schematic diagram of the effect of synthesizing a chessboard pattern on a traditional display panel. The results show that there is a color edge phenomenon at the boundary of the white chessboard pattern, and the display is uneven in all directions. Figure 2(d) is a schematic diagram of the synthetic line effect of a traditional display panel. The results show that the white lines arranged horizontally and the white lines arranged vertically are uneven in thickness.

[0080] Figure 2 (e) is a schematic diagram of the structure of the display panel 100 in this application, Figure 2 (f) is a schematic diagram of the white light synthesis effect of the display panel 100 in the present application. The result shows that the white light synthesized by the display panel 100 in the present application has a larger area, is more uniform, and has no color edge phenomenon; Figure 2 (g) is a schematic diagram of the effect of synthesizing a chessboard pattern on the display panel 100 in the present application. The result shows that there is no color edge phenomenon at the boundary of the white chessboard pattern, and the display is uniform in all directions; Figure 2 (h) is a schematic diagram of the synthetic line effect of the display panel 100 in the present application, and the result shows that the white lines arranged in the horizontal direction and the white lines arranged in the vertical direction are uniform in thickness.

[0081] See also Figures 1 to 3 In some embodiments, the display panel 100 further includes a first auxiliary electrode 5000, which is disposed on a side of the substrate 1000 close to the light-emitting unit group 2000, wherein the first transparent electrode 2030, the third transparent electrode 2070 and the fifth transparent electrode 2110 are all electrically connected to the first auxiliary electrode 5000.

[0082] In this embodiment, by electrically connecting the first transparent electrode 2030, the third transparent electrode 2070 and the fifth transparent electrode 2110 to the first auxiliary electrode 5000, the first auxiliary electrode 5000 can simultaneously provide voltage to the first transparent electrode 2030, the third transparent electrode 2070 and the fifth transparent electrode 2110, which is beneficial to reducing the voltage drop of the display panel 100 and optimizing the display uniformity.

[0083] In some embodiments, the first auxiliary electrode 5000 is arranged corresponding to the light-emitting unit group 2000. By arranging the first auxiliary electrode 5000 corresponding to the light-emitting unit group 2000, compared with the traditional technology, there is no need to set a cathode connection structure in the non-display area of ​​the display panel 100, which is beneficial to reducing the border size of the display panel 100.

[0084] In some embodiments, the display panel 100 further includes a plurality of light emitting unit groups 2000 and a plurality of first auxiliary electrodes 5000 , and the plurality of light emitting unit groups 2000 and the plurality of first auxiliary electrodes 5000 are disposed in a one-to-one correspondence.

[0085] In some embodiments, the display panel 100 also includes a driving layer 4000, which is located on the side of the substrate 1000 close to the light-emitting unit group 2000. A first electrical connection point (not shown) is provided on the driving layer 4000 at the position corresponding to each first auxiliary electrode 5000, and each first auxiliary electrode 5000 is electrically connected to the driving layer 4000 through the corresponding first electrical connection point.

[0086] In a traditional display panel, all pixels are electrically connected to the same electrical connection point. Assuming that the electrical connection point is located in a border area on one side of the display panel, the distance between each pixel and the electrical connection point gradually increases in the direction from the border area on one side of the display panel to the border area on the other side of the display panel, so that the voltage drop between each pixel and the electrical connection point gradually increases, thereby causing the output voltage applied to each pixel to gradually decrease, and then causing the brightness of each pixel to gradually decrease, resulting in uneven brightness of each pixel, resulting in poor display effect.

[0087] In the display panel 100 of the present application, each light-emitting unit group 2000 is electrically connected to the corresponding first electrical connection point on the driving layer 4000 through the corresponding first auxiliary electrode 5000, and each light-emitting unit group 2000 is connected to a different first electrical connection point on the driving layer 4000. Since each first electrical connection point on the driving layer 4000 is arranged at the corresponding first auxiliary electrode 5000, and the distance between each light-emitting unit group 2000 and the corresponding first auxiliary electrode 5000 is the same, the distance between each light-emitting unit group 2000 and the corresponding first electrical connection point is the same, the voltage drop between each light-emitting unit group 2000 and the corresponding first electrical connection point on the driving layer 4000 is the same, the output voltage applied by the driving layer 4000 to each light-emitting unit group 2000 in the display panel 100 is the same, the brightness of each light-emitting unit group 2000 in the display panel 100 is relatively uniform, and the display effect is improved.

[0088] In some embodiments, a second electrical connection point (not shown) is provided on the driving layer 4000 at the position corresponding to the first electrode 2010 in each light-emitting unit group 2000, and the first electrode 2010 of each light-emitting unit group 2000 is electrically connected to the driving layer 4000 through the corresponding second electrical connection point.

[0089] In some embodiments, the first electrode 2010 is disposed on one side of the driving layer 4000 .

[0090] See also Figure 3 and Figure 4 In some embodiments, the display panel 100 includes a pixel defining layer 3000 , which is disposed on a side of the substrate 1000 close to the light-emitting unit group 2000 , and a pixel opening 3010 is disposed on the pixel defining layer 3000 , and at least a portion of the light-emitting unit group 2000 is disposed in the pixel opening 3010 .

[0091] In this embodiment, a pixel opening 3010 is provided on the pixel definition layer 3000 , and at least a portion of the light emitting unit group 2000 is disposed in the pixel opening 3010 to define a light emitting area of ​​the light emitting unit group 2000 .

[0092] In some embodiments, the first auxiliary electrode 5000 is disposed between the pixel definition layer 3000 and the substrate 1000. In this way, it is beneficial to electrically connect the light emitting unit group 2000 and the driving layer 4000.

[0093] In some embodiments, the pixel defining layer 3000 is located on a side of the driving layer 4000 close to the light emitting unit group 2000 , and the first auxiliary electrode 5000 is disposed between the pixel defining layer 3000 and the driving layer 4000 .

[0094] See also Figure 3 and Figure 4 In some embodiments, a first via hole 3020 is provided on the pixel defining layer 3000 , and the first transparent electrode 2030 passes through the first via hole 3020 to be electrically connected to the first auxiliary electrode 5000 .

[0095] In this embodiment, a first via hole 3020 is provided on the pixel defining layer 3000 so that the first transparent electrode 2030 passes through the pixel defining layer 3000 and is directly electrically connected to the first auxiliary electrode 5000 .

[0096] In some embodiments, a second via hole 2041 is disposed on the first encapsulation layer 2040 , and the third transparent electrode 2070 passes through the second via hole 2041 and is electrically connected to the first transparent electrode 2030 .

[0097] In this embodiment, the second via hole 2041 is provided on the first encapsulation layer 2040 so that the third transparent electrode 2070 passes through the first encapsulation layer 2040 and is directly electrically connected to the first transparent electrode 2030 , and further electrically connected to the first auxiliary electrode 5000 through the first transparent electrode 2030 .

[0098] See also Figure 4 and Figure 5 In some embodiments, a third via hole 2081 is provided on the second encapsulation layer 2080 , and the fifth transparent electrode 2110 passes through the third via hole 2081 and is electrically connected to the third transparent electrode 2070 .

[0099] In this embodiment, a third via hole 2081 is provided on the second encapsulation layer 2080 so that the fifth transparent electrode 2110 passes through the second encapsulation layer 2080 and is directly electrically connected to the third transparent electrode 2070 , and then is electrically connected to the first transparent electrode 2030 through the third transparent electrode 2070 , and finally is electrically connected to the first auxiliary electrode 5000 through the first transparent electrode 2030 .

[0100] In some embodiments, a first connection electrode 2044 is disposed in the second via hole 2041, one end of the first connection electrode 2044 is electrically connected to the first transparent electrode 2030, and the other end is electrically connected to the third transparent electrode 2070. It is understood that the material of the first connection electrode 2044 can be the same as that of the first transparent electrode 2030 and the third transparent electrode 2070.

[0101] See also Figure 5 and Figure 6 In some embodiments, a second connection electrode 2083 is disposed in the third via hole 2081, one end of the second connection electrode 2083 is electrically connected to the third transparent electrode 2070, and the other end is electrically connected to the fifth transparent electrode 2110. It is understood that the second connection electrode 2083, the third transparent electrode 2070 and the fifth transparent electrode 2110 may be made of the same material.

[0102] See also Figure 6 In some embodiments, the edge of the first transparent electrode 2030 is separated from the first electrode 2010 by the first light emitting layer 2020 and the pixel defining layer 3000 .

[0103] In this embodiment, the first transparent electrode 2030 is separated from the first electrode 2010 by the first light emitting layer 2020 and the pixel defining layer 3000 to prevent the first transparent electrode 2030 from directly electrically contacting the first electrode 2010 and causing a short circuit.

[0104] See also Figure 4 and Figure 6 In some embodiments, the first transparent electrode 2030 includes a first transparent electrode portion 2031 and a second transparent electrode portion 2032. The first transparent electrode portion 2031 is disposed on the side of the first light-emitting layer 2020 away from the first electrode 2010. One end of the second transparent electrode portion 2032 is electrically connected to the first transparent electrode portion 2031, and the other end passes through the first via hole 3020 and is electrically connected to the first auxiliary electrode 5000. Figure 6 As shown in A in the middle, the side of the first light emitting layer 2020 away from the first via hole 3020 and the side of the pixel opening 3010 away from the first via hole 3020 form a first pit; Figure 6 As shown at B in the middle, the side of the first light-emitting layer 2020 close to the first via hole 3020 and the side of the pixel opening 3010 close to the first via hole 3020 form a second pit, the end of the first transparent electrode portion 2031 facing away from the first via hole 3020 is located in the first pit, and the end of the first transparent electrode portion 2031 close to the first via hole 3020 is located in the second pit, so as to fill the gap between the outer peripheral surface of the first light-emitting layer 2020 and the inner wall of the pixel opening 3010, thereby preventing the first transparent electrode 2030 from electrically crosstalking with the first electrode 2010.

[0105] It is understandable that the first transparent electrode portion 2031 and the second transparent electrode portion 2032 may be made of the same material.

[0106] In some embodiments, one end of the first connection electrode 2044 is electrically connected to the second transparent electrode portion 2032 , and the other end of the first connection electrode 2044 is electrically connected to the third transparent electrode 2070 .

[0107] See also Figure 6 In some embodiments, the edge of the third transparent electrode 2070 is separated from the second transparent electrode 2050 by the second light emitting layer 2060 and the second encapsulation layer 2080 .

[0108] In this embodiment, the third transparent electrode 2070 is separated from the second transparent electrode 2050 by the second light emitting layer 2060 and the second encapsulation layer 2080 to prevent the third transparent electrode 2070 from directly electrically contacting the second transparent electrode 2050 and causing a short circuit.

[0109] See also Figure 7 and Figure 8 In some embodiments, the first encapsulation layer 2040 includes a first encapsulation portion 2045 and a second encapsulation portion 2046. The first encapsulation portion 2045 is disposed on a side of the first transparent electrode 2030 away from the first light-emitting layer 2020. Figure 7 As shown at D in the middle, one end of the first packaging portion 2045 close to the first via hole 3020 is in contact with one end of the second light emitting layer 2060 close to the first via hole 3020; Figure 8 As shown, the second packaging portion 2046 is disposed at one end of the first packaging portion 2045 close to the first via hole 3020 .

[0110] It can be understood that the first packaging part 2045 and the second packaging part 2046 can be made of the same material.

[0111] Please continue reading Figure 7 and Figure 8 In some embodiments, the second encapsulation layer 2080 includes a third encapsulation portion 2084, a fourth encapsulation portion 2085, and a fifth encapsulation portion 2086. The third encapsulation portion 2084 is disposed on a side of the third transparent electrode 2070 away from the second light-emitting layer 2060. Figure 7 As shown in the middle C, the fourth packaging part 2085 is arranged on the side of the third transparent electrode 2070 away from the first via hole 3020, one end of the fourth packaging part 2085 is connected to the side of the third packaging part 2084 away from the first via hole 3020, and the other end of the fourth packaging part 2085 is connected to the side of the second light-emitting layer 2060 away from the first via hole 3020; Figure 8As shown, the fifth packaging portion 2086 is disposed on a side of the third packaging portion 2084 close to the first via hole 3020 , and the third via hole 2081 is opened in the fifth packaging portion 2086 .

[0112] It can be understood that the materials of the third packaging part 2084, the fourth packaging part 2085, and the fifth packaging part 2086 can be the same.

[0113] See also Fig. 9 and Fig.10 In some embodiments, the edge of the fifth transparent electrode 2110 is separated from the fourth transparent electrode 2090 by the third light emitting layer 2100 and the third encapsulation layer 2120 .

[0114] In this embodiment, the fifth transparent electrode 2110 is separated from the fourth transparent electrode 2090 by the third light emitting layer 2100 and the third encapsulation layer 2120 to prevent the fifth transparent electrode 2110 from directly electrically contacting the fourth transparent electrode 2090 and causing a short circuit.

[0115] In some embodiments, the third encapsulation layer 2120 includes a sixth encapsulation portion 2121 and a seventh encapsulation portion 2122, the seventh encapsulation portion 2122 is disposed on the side of the fifth transparent electrode 2110 away from the third light-emitting layer 2100, and the sixth encapsulation portion 2121 is disposed on the side of the fifth transparent electrode 2110 away from the first via hole 3020. Fig. 9 As shown at F in the figure, one end of the sixth encapsulation part 2121 is connected to the seventh encapsulation part 2122, and the other end of the sixth encapsulation part 2121 is connected to the third light-emitting layer 2100; Fig. 9 As shown at E in the middle, the third light emitting layer 2100 is in contact with the second encapsulation layer 2080 at one end close to the first via hole 3020 .

[0116] It can be understood that the sixth packaging part 2121 and the seventh packaging part 2122 can be made of the same material.

[0117] In some embodiments, the first light-emitting layer 2020 is entirely located within the pixel opening 3010 of the pixel defining layer 3000 , the first transparent electrode 2030 is located on the side of the pixel defining layer 3000 facing away from the substrate 1000 , and the first electrode 2010 is located on the side of the pixel defining layer 3000 close to the substrate 1000 , and is arranged corresponding to the first light-emitting layer 2020 .

[0118] See also Fig.11 In some embodiments, the display panel 100 further includes a second auxiliary electrode 6000 , and the second transparent electrode 2050 is electrically connected to the second auxiliary electrode 6000 .

[0119] In this embodiment, the second transparent electrode 2050 is electrically connected to the second auxiliary electrode 6000, so that the second auxiliary electrode 6000 is electrically connected to the second transparent electrode 2050 and the driving layer 4000, thereby facilitating the driving layer 4000 to adjust the current applied to the second transparent electrode 2050 through the second auxiliary electrode 6000 to adjust the luminous brightness of the second light-emitting layer 2060.

[0120] In some embodiments, a fourth via hole 2042 is disposed at a position of the first encapsulation layer 2040 corresponding to the second auxiliary electrode 6000 , and the second transparent electrode 2050 passes through the fourth via hole 2042 to be electrically connected to the second auxiliary electrode 6000 .

[0121] See also Fig.12 In some embodiments, the display panel 100 further includes a third auxiliary electrode 7000 , and the fourth transparent electrode 2090 is electrically connected to the third auxiliary electrode 7000 .

[0122] In this embodiment, the fourth transparent electrode 2090 is electrically connected to the third auxiliary electrode 7000, so that the third auxiliary electrode 7000 is electrically connected to the fourth transparent electrode 2090 and the driving layer 4000, thereby facilitating the driving layer 4000 to adjust the current applied to the fourth transparent electrode 2090 through the third auxiliary electrode 7000 to adjust the luminous brightness of the third light-emitting layer 2100.

[0123] In some embodiments, a sixth via hole 2082 is disposed at a position of the second encapsulation layer 2080 corresponding to the third auxiliary electrode 7000 , and the fourth transparent electrode 2090 passes through the sixth via hole 2082 to be electrically connected to the third auxiliary electrode 7000 .

[0124] In some embodiments, a fifth via hole 2043 is disposed at the first encapsulation layer 2040 corresponding to the third auxiliary electrode 7000 , and the fourth transparent electrode 2090 passes through the sixth via hole 2082 and the fifth via hole 2043 in sequence, and is finally electrically connected to the third auxiliary electrode 7000 .

[0125] In some embodiments, the second auxiliary electrode 6000 , the third auxiliary electrode 7000 and the first electrode 2010 are disposed in the same layer.

[0126] In this embodiment, the second auxiliary electrode 6000, the third auxiliary electrode 7000 and the first electrode 2010 are arranged in the same layer, so that the second auxiliary electrode 6000, the third auxiliary electrode 7000 and the first electrode 2010 are manufactured in one process, simplifying the manufacturing process and improving work efficiency.

[0127] In some embodiments, the second auxiliary electrode 6000 and the third auxiliary electrode 7000 are both disposed corresponding to the light emitting unit group 2000 .

[0128] In some embodiments, a third electrical connection point (not shown) is provided at the position of the second auxiliary electrode 6000 corresponding to each light-emitting unit group 2000 on the driving layer 4000, and the second auxiliary electrode 6000 of each light-emitting unit group 2000 is electrically connected to the driving layer 4000 via the corresponding third electrical connection point.

[0129] In some embodiments, a fourth electrical connection point (not shown) is provided at the position of the third auxiliary electrode 7000 corresponding to each light-emitting unit group 2000 on the driving layer 4000, and the third auxiliary electrode 7000 of each light-emitting unit group 2000 is electrically connected to the driving layer 4000 through the corresponding fourth electrical connection point.

[0130] See also Figure 1 and Fig.12 In some embodiments, the display panel 100 further includes an electrode layer 9000 , and the first electrode 2010 , the first auxiliary electrode 5000 , the second auxiliary electrode 6000 , and the third auxiliary electrode 7000 are all located in the electrode layer 9000 .

[0131] See also Fig.12 In some embodiments, the first electrode 2010 is configured as a light-reflecting electrode.

[0132] In this embodiment, the first electrode 2010 is constructed as a reflective electrode to reflect the light emitted by the first light-emitting layer 2020, the second light-emitting layer 2060 and the third light-emitting layer 2100 along the direction from the first electrode 2010 to the third encapsulation layer 2120 to ensure the light emitting effect of each light-emitting unit.

[0133] The present application also proposes a display device (not shown), comprising the display panel 100 described above.

[0134] The display device can be a laptop computer, a mobile phone, a wireless device, a personal data assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, an automobile display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photograph, an electronic billboard or sign, a projector, packaging, etc.

[0135] In traditional display screen technology, three types of pixels, namely red light-emitting units, green light-emitting units and blue light-emitting units, are arranged horizontally to form light-emitting unit groups. The area of ​​each light-emitting unit group is equal to the sum of the areas of the red light-emitting units, the green light-emitting units and the blue light-emitting units. In the horizontal direction, the sum of the size of the red light-emitting unit, the size of the green light-emitting unit and the size of the blue light-emitting unit is the size of the light-emitting unit group. There is a spacing of two pixels between any two adjacent light-emitting unit groups that emit light of the same color. For example, a green light-emitting unit and a blue light-emitting unit are arranged between two red light-emitting units in two adjacent light-emitting unit groups.

[0136] In this embodiment, the first electrode 2010, the first light-emitting layer 2020 and the first transparent electrode 2030 constitute a first light-emitting unit, the second transparent electrode 2050, the second light-emitting layer 2060 and the third transparent electrode 2070 constitute a second light-emitting unit, and the fourth transparent electrode 2090, the third light-emitting layer 2100 and the fifth transparent electrode 2110 constitute a third light-emitting unit. The first light-emitting unit, the second light-emitting unit and the third light-emitting unit are stacked to form a light-emitting unit group 2000, and the area of ​​the light-emitting unit group 2000 is equal to the area of ​​the first light-emitting unit, the area of ​​the second light-emitting unit or the area of ​​the third light-emitting unit. In the horizontal direction, the two light-emitting units emitting the same color of light in any two adjacent light-emitting unit groups 2000 are adjacent, for example, the two first light-emitting units in two adjacent light-emitting unit groups 2000 are adjacent. Compared with the light-emitting unit group composed of horizontally arranged red, green and blue pixels in traditional display technology, the light-emitting unit group 2000 in the present application can save 2 / 3 of the occupied area. Within a unit area, the number of light-emitting unit groups 2000 can be 3 times that of traditional technology, thereby increasing the pixel density by 3 times, which is conducive to meeting high-resolution requirements.

[0137] See also Fig.13 , Fig.13 1 is a flowchart of a method for manufacturing a display panel 100 in an embodiment of the present application. The method for manufacturing a display panel 100 provided in an embodiment of the present application includes:

[0138] S1000: providing a substrate 1000;

[0139] S2000: forming a light-emitting unit group 2000 on one side of the substrate 1000, the light-emitting unit group 2000 includes a first light-emitting unit, a first encapsulation layer 2040, a second light-emitting unit, a second encapsulation layer 2080, a third light-emitting unit, and a third encapsulation layer 2120 stacked in a direction away from the substrate 1000, the first light-emitting unit includes a first electrode 2010, a first light-emitting layer 2020, and a first transparent electrode 2030 stacked in a direction away from the substrate 1000, the second light-emitting unit includes a second transparent electrode 2050, a second light-emitting layer 2060, and a third transparent electrode 2070 stacked in a direction away from the substrate 1000, the third light-emitting unit includes a fourth transparent electrode 2090, a third light-emitting layer 2100, and a fifth transparent electrode 2110 stacked in a direction away from the substrate 1000, wherein the first light-emitting layer 2020, the second light-emitting layer 2060, and the third light-emitting layer 2100 are respectively used to emit light of different colors.

[0140] In traditional display screen technology, three types of pixels, namely red light-emitting units, green light-emitting units and blue light-emitting units, are arranged horizontally to form light-emitting unit groups. The area of ​​each light-emitting unit group is equal to the sum of the areas of the red light-emitting units, the green light-emitting units and the blue light-emitting units. In the horizontal direction, the sum of the size of the red light-emitting unit, the size of the green light-emitting unit and the size of the blue light-emitting unit is the size of the light-emitting unit group. There is a spacing of two pixels between any two adjacent light-emitting unit groups that emit light of the same color. For example, a green light-emitting unit and a blue light-emitting unit are arranged between two red light-emitting units in two adjacent light-emitting unit groups.

[0141] In this embodiment, the first electrode 2010, the first light-emitting layer 2020 and the first transparent electrode 2030 constitute a first light-emitting unit, the second transparent electrode 2050, the second light-emitting layer 2060 and the third transparent electrode 2070 constitute a second light-emitting unit, and the fourth transparent electrode 2090, the third light-emitting layer 2100 and the fifth transparent electrode 2110 constitute a third light-emitting unit. The first light-emitting unit, the second light-emitting unit and the third light-emitting unit are stacked to form a light-emitting unit group 2000, and the area of ​​the light-emitting unit group 2000 is equal to the area of ​​the first light-emitting unit, the area of ​​the second light-emitting unit or the area of ​​the third light-emitting unit. In the horizontal direction, the two light-emitting units emitting the same color of light in any two adjacent light-emitting unit groups 2000 are adjacent, for example, the two first light-emitting units in two adjacent light-emitting unit groups 2000 are adjacent. Compared with the light-emitting unit group composed of horizontally arranged red, green and blue pixels in traditional display technology, the light-emitting unit group 2000 in the present application can save 2 / 3 of the occupied area. Within a unit area, the number of light-emitting unit groups 2000 can be 3 times that of traditional technology, thereby increasing the pixel density by 3 times, which is conducive to meeting high-resolution requirements.

[0142] See also Fig.14 In some embodiments, S2000 specifically includes the following steps:

[0143] S2010: An electrode layer 9000 is disposed on one side of the substrate 1000, and a side of the electrode layer 9000 facing away from the substrate 1000 is divided into a plurality of first regions (not shown) arranged at intervals along the second direction, each first region includes a plurality of first sub-regions (not shown) arranged at intervals along the first direction, and a first electrode 2010, a first auxiliary electrode 5000, a second auxiliary electrode 6000 and a third auxiliary electrode 7000 are disposed in each first sub-region, wherein the first auxiliary electrode 5000 is located on one side of the first electrode 2010 along the first direction and extends along the second direction, the second auxiliary electrode 6000 and the third auxiliary electrode 7000 are located on one side of the first electrode 2010 along the second direction and are arranged at intervals along the first direction, the first direction is the length direction or the width direction of the electrode layer 9000, and the second direction is perpendicular to the first direction.

[0144] S2020 : Disposing a pixel defining layer 3000 on a side of the electrode layer 9000 facing away from the substrate 1000 .

[0145] S2030 : opening a pixel opening 3010 on the pixel definition layer 3000 at a position corresponding to the first electrode 2010 in each first sub-region.

[0146] S2040: A first via hole 3020 is opened on the pixel defining layer 3000 at a position corresponding to the first auxiliary electrode 5000 in each first sub-region, and a size of the first via hole 3020 in the second direction is a first value. Exemplarily, the first value is less than or equal to the size of the first auxiliary electrode 5000 in the second direction.

[0147] S2050 : Disposing a first light emitting layer 2020 in each pixel opening 3010 .

[0148] S2060: A plurality of first transparent electrodes 2030 are arranged on a side of the pixel defining layer 3000 away from the electrode layer 9000, the plurality of first transparent electrodes 2030 are arranged corresponding to the plurality of first regions, each first transparent electrode 2030 is arranged on a side of the second auxiliary electrode 6000 and the third auxiliary electrode 7000 in the corresponding first region along the second direction, the size of each first transparent electrode 2030 in the first direction is less than or equal to the size of the electrode layer 9000 in the first direction, the size of each first transparent electrode 2030 in the second direction is greater than or equal to the size of the first electrode 2010 in the second direction, and each first transparent electrode 2030 is electrically connected to the first auxiliary electrode 5000 in the corresponding first region. Exemplarily, the material of the first transparent electrode 2030 may be IZO (indium zinc oxide).

[0149] S2070: A first encapsulation layer 2040 is disposed on the side of the first transparent electrode 2030 away from the pixel defining layer 3000. Exemplarily, the first encapsulation layer 2040 is manufactured by using an ALD (Atomic Layer Deposition) thin film process. The first encapsulation layer 2040 is provided with a second via hole 2041 at the position of the first auxiliary electrode 5000 in each first sub-region. The dimension of the second via hole 2041 in the second direction is a second value, which is smaller than the first value. Exemplarily, the second value is equal to 2 / 3 of the dimension of the first via hole 3020 in the second direction. The first encapsulation layer 2040 is provided with a fourth via hole 2042 at the position of the second auxiliary electrode 6000 in each first sub-region.

[0150] S2080: a plurality of second transparent electrodes 2050 are disposed on a side of the first encapsulation layer 2040 away from the first transparent electrode 2030 . The plurality of second transparent electrodes 2050 are disposed in one-to-one correspondence with the plurality of first electrodes 2010 . Exemplarily, the material of the second transparent electrodes 2050 may be ITO (indium tin oxide).

[0151] S2090 : disposing a second light-emitting layer 2060 on a side of each second transparent electrode 2050 away from the first encapsulation layer 2040 , wherein the orthographic projection of the second light-emitting layer 2060 on the substrate 1000 coincides with the orthographic projection of the first light-emitting layer 2020 on the substrate 1000 .

[0152] S2100: a plurality of third transparent electrodes 2070 are arranged at intervals along the second direction on the side of the second light-emitting layer 2060 away from the second transparent electrode 2050, the plurality of third transparent electrodes 2070 are arranged correspondingly to the plurality of first transparent electrodes 2030, and the orthographic projection of each third transparent electrode 2070 on the substrate 1000 coincides with the orthographic projection of the corresponding first transparent electrode 2030 on the substrate 1000. Exemplarily, the material of the third transparent electrode 2070 may be IZO (indium zinc oxide).

[0153] S2110: A second encapsulation layer 2080 is disposed on a side of the third transparent electrode 2070 away from the second light-emitting layer 2060. Exemplarily, the second encapsulation layer 2080 is manufactured by using an ALD (Atomic Layer Deposition) thin film process. A third via hole 2081 is provided on the second encapsulation layer 2080 at a position corresponding to the first auxiliary electrode 5000 in each first sub-region. A dimension of each third via hole 2081 in the second direction is a third value, which is smaller than the second value. Exemplarily, the third value is equal to 1 / 3 of a dimension of the first via hole 3020 in the second direction. A sixth via hole 2082 is provided on the second encapsulation layer 2080 at a position corresponding to the third auxiliary electrode 7000 in each first sub-region.

[0154] S2120: a plurality of fourth transparent electrodes 2090 are disposed on the side of the second encapsulation layer 2080 away from the third transparent electrode 2070, and the plurality of fourth transparent electrodes 2090 are disposed one-to-one corresponding to the plurality of first electrodes 2010. For example, the material of the fourth transparent electrodes 2090 may be ITO (indium tin oxide).

[0155] S2130 : disposing a third light-emitting layer 2100 on a side of each fourth transparent electrode 2090 away from the second encapsulation layer 2080 , wherein an orthographic projection of the third light-emitting layer 2100 on the substrate 1000 coincides with an orthographic projection of the second light-emitting layer 2060 on the substrate 1000 .

[0156] S2140: a plurality of fifth transparent electrodes 2110 arranged at intervals along the second direction are arranged on the side of the third light-emitting layer 2100 away from the fourth transparent electrode 2090, and the plurality of fifth transparent electrodes 2110 are arranged one-to-one correspondingly to the plurality of third transparent electrodes 2070. Exemplarily, the orthographic projection of each fifth transparent electrode 2110 on the substrate 1000 coincides with the orthographic projection of the corresponding third transparent electrode 2070 on the substrate 1000. Exemplarily, the material of the fifth transparent electrode 2110 may be IZO (indium zinc oxide).

[0157] S2150: A third encapsulation layer 2120 is disposed on the side of the fifth transparent electrode 2110 away from the third light-emitting layer 2100. Exemplarily, the third encapsulation layer 2120 is manufactured by adopting an ALD (Atomic Layer Deposition) thin film process or by adopting an existing display panel encapsulation technology. The orthographic projection of the third encapsulation layer 2120 on the substrate 1000 coincides with the orthographic projection of the pixel defining layer 3000 on the substrate.

[0158] In this embodiment, since the second transparent electrode 2050 and the fourth transparent electrode 2090 have different shapes, the second transparent electrode 2050 is prepared using a first mask (not shown), and the fourth transparent electrode 2090 is prepared using a second mask (not shown); since the orthographic projection of the second light-emitting layer 2060 on the substrate 1000 coincides with the orthographic projection of the first light-emitting layer 2020 on the substrate 1000, and the orthographic projection of the third light-emitting layer 2100 on the substrate 1000 coincides with the orthographic projection of the second light-emitting layer 2060 on the substrate 1000, the staff can use the same set of third masks (not shown) to prepare the first light-emitting layer 2020, the second light-emitting layer 2060 and the third light-emitting layer 2100; since the orthographic projection of each third transparent electrode 2070 on the substrate 1000 coincides with the orthographic projection of the corresponding The orthographic projections of the first transparent electrode 2030 on the substrate 1000 overlap, and the orthographic projections of each fifth transparent electrode 2110 on the substrate 1000 overlap with the orthographic projections of the corresponding third transparent electrode 2070 on the substrate 1000, so the staff can use the same set of fourth mask plates (not shown) to prepare the first transparent electrode 2030, the third transparent electrode 2070 and the fifth transparent electrode 2110; because the sizes and positions of the through holes opened on the first encapsulation layer 2040 and the second encapsulation layer 2080 are different, the fifth mask plate (not shown) is used to prepare the second through hole 2041 and the fourth through hole 2042 on the first encapsulation layer 2040, and the sixth mask plate (not shown) is used to prepare the third through hole 2081 and the sixth through hole 2082 on the second encapsulation layer 2080.

[0159] In summary, the method for manufacturing the display panel 100 in the present application only requires 6 sets of mask plates, which reduces the number of required mask plates and saves the manufacturing cost of the display panel 100 .

[0160] In some embodiments, the first light-emitting layer 2020 , the second light-emitting layer 2060 , and the third light-emitting layer 2100 are prepared using a silicon nitride mask (not shown) to ensure patterning accuracy of the prepared first light-emitting layer 2020 , the second light-emitting layer 2060 , and the third light-emitting layer 2100 .

[0161] Furthermore, the silicon nitride mask is used in combination with a silicon-based backplane process to improve the pixel density of the display panel 100 .

[0162] See also Fig.15 and Fig.16 In some embodiments, S2060 specifically includes the following steps:

[0163] S2061: The first transparent electrode 2030 is separated into a plurality of first transparent areas 2033 arranged at intervals along the first direction, and the plurality of first transparent areas 2033 are arranged corresponding to each of the plurality of pixel openings 3010, and each first transparent area 2033 is covered on the first light-emitting layer 2020 in the corresponding pixel opening 3010, and a first through hole 2034 is provided at the position of each first transparent area 2033 corresponding to the first auxiliary electrode 5000, and the size of the first through hole 2034 along the second direction is a fourth value, which is less than or equal to the first value and greater than or equal to the second value. Exemplarily, the fourth value is equal to 2 / 3 of the size of the first through hole 3020 along the second direction.

[0164] By setting the first through hole 2034, the size of the first through hole 2034 along the second direction is a fourth value, the fourth value is less than or equal to the first value, and greater than or equal to the second value, so that when the first packaging layer 2040 is covered on the side of the first transparent area 2033 away from the pixel definition layer 3000, the orthographic projection of the first through hole 2034 on the substrate 1000 is greater than or equal to the orthographic projection of the second through hole 2041 on the substrate 1000, thereby facilitating the first packaging layer 2040 to completely wrap the first transparent area 2033, preventing external water vapor from entering the first transparent area 2033 from the second through hole 2041 in the first packaging layer 2040 through the first through hole 2034, thereby improving the reliability of the packaging of the first packaging layer 2040.

[0165] Fig.16 FIG. 1 is a schematic diagram comparing the packaging effects of the display panel 100 structure in an embodiment of the present application and the traditional display panel structure, wherein Fig.16 (a) is a traditional display panel packaging effect diagram. Fig.16 (b) The packaging effect diagram of the display panel 100 in the present application. As can be seen from the figure, the first packaging layer 2040 in the traditional display panel cannot completely wrap the first transparent electrode 2030. At the position where the second via hole 2041 is opened in the first packaging layer 2040, the first transparent electrode 2030 is in contact with the external water vapor; however, in the display panel 100 of the present application, since the size of the first through hole 2034 along the second direction is larger than the size of the second through hole 2041 along the second direction, the staff can set a rim (not shown) in the first through hole 2034 to isolate the first transparent electrode 2030 from the external water vapor.

[0166] See also Fig.15 and Fig.16 In some embodiments, S2100 specifically includes the following steps:

[0167] S2101: The third transparent electrode 2070 is separated into a plurality of second transparent areas 2071 along the first direction, and two second through holes 2072 are arranged at intervals on one side of each second transparent area 2071 along the first direction, and the size of each second through hole 2072 along the second direction is a fifth value, and the fifth value is less than or equal to the second value and greater than or equal to the third value. Exemplarily, the fifth value is equal to 1 / 3 of the size of the first via 3020 along the second direction.

[0168] By providing the second through hole 2072, the dimension of the second through hole 2072 along the second direction is a fifth value, the fifth value is less than or equal to the second value, and greater than or equal to the third value. On the one hand, when the second encapsulation layer 2080 is covered on the side of the second transparent area 2071 away from the second light-emitting layer 2060, the orthographic projection of any second through hole 2072 on the substrate 1000 is greater than or equal to the orthographic projection of the third through hole 2081 on the substrate 1000, so that the second encapsulation layer 2080 completely wraps the second transparent area 2071, and prevents external water vapor from entering the second transparent area 2071 from the third through hole 2081 at the second encapsulation layer 2080, thereby improving the encapsulation reliability of the second encapsulation layer 2080; on the other hand, the third transparent electrode 2070 is completely separated from the first transparent electrode 2030, so that the third transparent electrode 2070 and the first transparent electrode 2030 are electrically connected to different first auxiliary electrodes 5000.

[0169] See also Fig.15 and Fig.16 In some embodiments, S2140 specifically includes the following steps:

[0170] S2141: Divide the fifth transparent electrode 2110 into a plurality of third transparent areas 2111 along the first direction, and set a third through hole 2112 on one side of each third transparent area 2111 along the first direction, and the size of the third through hole 2112 along the second direction is a sixth value, and the sixth value is greater than or equal to the difference between the first value and the third value. Exemplarily, the sixth value is equal to 2 / 3 of the size of the first via 3020 along the second direction.

[0171] By making the sixth value greater than or equal to the difference between the first value and the third value, it is convenient to electrically connect the first transparent electrode 2030 , the third transparent electrode 2070 , and the fifth transparent electrode 2110 to different first auxiliary electrodes 5000 , respectively.

[0172] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0173] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display panel, characterized in that: include: substrate; as well as A light-emitting unit group is arranged on one side of the substrate; the light-emitting unit group includes a first light-emitting unit, a first encapsulation layer, a second light-emitting unit, a second encapsulation layer, a third light-emitting unit and a third encapsulation layer stacked in a direction away from the substrate, the first light-emitting unit includes a first electrode, a first light-emitting layer, and a first transparent electrode stacked in a direction away from the substrate, the second light-emitting unit includes a second transparent electrode, a second light-emitting layer, and a third transparent electrode stacked in a direction away from the substrate, and the third light-emitting unit includes a fourth transparent electrode, a third light-emitting layer, and a fifth transparent electrode stacked in a direction away from the substrate; The first light-emitting layer, the second light-emitting layer and the third light-emitting layer are used to emit light of different colors respectively.

2. The display panel according to claim 1, characterized in that: The center of the first light-emitting layer, the center of the second light-emitting layer and the center of the third light-emitting layer coincide with each other; Optionally, an orthographic projection of the first light-emitting layer on the substrate, an orthographic projection of the second light-emitting layer on the substrate, and an orthographic projection of the third light-emitting layer on the substrate overlap.

3. The display panel according to claim 1 or 2, characterized in that: The display panel further includes a first auxiliary electrode, which is disposed on a side of the substrate close to the light-emitting unit group; The first transparent electrode, the third transparent electrode and the fifth transparent electrode are all electrically connected to the first auxiliary electrode.

4. The display panel according to claim 3, characterized in that: The display panel further comprises a pixel defining layer, wherein the pixel defining layer is arranged on a side of the substrate close to the light emitting unit group; A pixel opening is provided on the pixel definition layer, and at least a portion of the light emitting unit group is provided in the pixel opening; Optionally, the first auxiliary electrode is disposed between the pixel defining layer and the substrate.

5. The display panel according to claim 4, characterized in that: The pixel defining layer is provided with a first via hole, and the first transparent electrode passes through the first via hole and is electrically connected to the first auxiliary electrode; Optionally, a second via hole is provided on the first encapsulation layer, and the third transparent electrode passes through the second via hole to be electrically connected to the first transparent electrode; Optionally, a third via hole is provided on the second encapsulation layer, and the fifth transparent electrode passes through the third via hole to be electrically connected to the third transparent electrode.

6. The display panel according to claim 4, characterized in that: The edge of the first transparent electrode is separated from the first electrode by means of the first light emitting layer and the pixel defining layer; And / or, the edge of the third transparent electrode is separated from the second transparent electrode by means of the second light-emitting layer and the second encapsulation layer; And / or, an edge of the fifth transparent electrode is separated from the fourth transparent electrode by means of the third light-emitting layer and the third encapsulation layer.

7. The display panel according to claim 1, characterized in that: The display panel further includes a second auxiliary electrode, and the second transparent electrode is electrically connected to the second auxiliary electrode; Optionally, the display panel further includes a third auxiliary electrode, and the fourth transparent electrode is electrically connected to the third auxiliary electrode; Optionally, the second auxiliary electrode, the third auxiliary electrode and the first electrode are arranged in the same layer.

8. The display panel according to claim 1, characterized in that: The first electrode is configured as a light-reflecting electrode.

9. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 8.

10. A method for preparing a display panel, characterized in that: include: providing a substrate; A light-emitting unit group is formed on one side of the substrate; the light-emitting unit group includes a first light-emitting unit, a first encapsulation layer, a second light-emitting unit, a second encapsulation layer, a third light-emitting unit and a third encapsulation layer stacked in a direction away from the substrate, the first light-emitting unit includes a first electrode, a first light-emitting layer, and a first transparent electrode stacked in a direction away from the substrate, the second light-emitting unit includes a second transparent electrode, a second light-emitting layer, and a third transparent electrode stacked in a direction away from the substrate, and the third light-emitting unit includes a fourth transparent electrode, a third light-emitting layer, and a fifth transparent electrode stacked in a direction away from the substrate; wherein the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are respectively used to emit light of different colors.

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