Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel, a preparation method thereof and a display device, and belongs to the technical field of display. The display panel provided by the invention comprises a driving backboard, a pixel definition layer, a plurality of light-emitting parts and a plurality of inorganic protection parts. The pixel definition layer is provided with a plurality of partition groove bodies, the partition groove bodies disconnect the light-emitting parts, the inorganic protection parts independently package the light-emitting areas of the corresponding light-emitting parts, and each light-emitting part and the corresponding inorganic protection part are formed through a one-time composition process. Therefore, in the etching process, the partition groove body and the inorganic protection part can prevent water vapor and oxygen from eroding the light-emitting area in the light-emitting part from the side face and the front face, the yield of the display panel is improved, and the reliability of the display panel is guaranteed. Thus, when R, G and B sub-pixels are formed on the display panel, FMM can be not needed, so that the PPI and aperture ratio of the display panel can be improved, the display effect of the display panel is improved, and the production cost of the display panel is reduced.

Description

Technical Field

[0001] The present application relates 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] A display panel that uses organic light emitting diodes (OLEDs) to emit light to realize display functions is called an OLED display panel. It has become a mainstream display structure due to its high color gamut, lightness, thinness, and flexibility.

[0003] Currently, OLED display panels typically use a fine metal mask (FMM) to evaporate the light-emitting parts of the red (Red, R), green (Green, G), and blue (Blue, B) sub-pixels. However, the accuracy of the FMM evaporation process limits the number of pixels per inch (PPI) and aperture ratio of the OLED display panel, thereby limiting the display effect of the OLED display panel. In addition, the FMM evaporation process will result in higher production costs for OLED display panels. Summary of the Invention

[0004] The present invention provides a display panel, a method for manufacturing the same, and a display device. The present invention addresses the issues of low PPI and aperture ratio in conventional display panels. The technical solution is as follows:

[0005] In one aspect, a display panel is provided, characterized in that it includes: a driving backplane, a pixel definition layer, a plurality of light-emitting portions, and a plurality of inorganic protection portions;

[0006] The pixel definition layer is located on one side of the driving backplane, and the pixel definition layer has a plurality of pixel openings and a plurality of partition grooves corresponding to the plurality of pixel openings, and the partition grooves are distributed around the corresponding pixel openings;

[0007] The plurality of light-emitting portions are separately arranged and are all located on a side of the pixel definition layer away from the driving backplane; the plurality of light-emitting portions correspond to the plurality of pixel openings, a portion of the light-emitting portions is located within the corresponding pixel openings, and another portion is located outside the corresponding pixel openings; and a portion of the light-emitting portion located outside the corresponding pixel openings is isolated by the isolation groove;

[0008] The multiple inorganic protection parts are arranged separately, and the multiple inorganic protection parts correspond to the multiple light-emitting parts. The inorganic protection parts are located on the side of the corresponding light-emitting parts away from the driving backplane, and the inorganic protection parts cover the part of the light-emitting parts that is located in the area surrounded by the partition groove body.

[0009] Optionally, the inorganic protection portion includes: a first inorganic portion and a second inorganic portion;

[0010] The first inorganic part is located in the area surrounded by the partition groove body; the second inorganic part is located outside the first inorganic part, and the orthographic projection of the second inorganic part on the driving back plate overlaps with the orthographic projection of the partition groove body on the driving back plate;

[0011] The first inorganic part and the second inorganic part are connected.

[0012] Optionally, the light emitting portion includes: a light emitting body portion and a peripheral portion;

[0013] The light-emitting body portion is located within the area enclosed by the partition groove body, the peripheral portion is distributed around the light-emitting body portion, and at least a portion of the peripheral portion is located within the partition groove body; the peripheral portion is disconnected from the light-emitting body portion near the inner side of the pixel opening;

[0014] The orthographic projection of the second inorganic part on the driving backplane covers the orthographic projection of the peripheral part on the driving backplane.

[0015] Optionally, the display panel further comprises: a plurality of first electrodes disposed separately, the plurality of first electrodes being connected in series;

[0016] The multiple first electrodes correspond to the multiple light-emitting parts and the multiple inorganic protective parts. The first electrodes are located on the side of the corresponding light-emitting parts away from the driving backplane and on the side of the corresponding inorganic protective parts facing the driving backplane.

[0017] Optionally, the driving backplane has a plurality of auxiliary electrodes connected to each other, the plurality of auxiliary electrodes correspond to the plurality of partition slots, the auxiliary electrodes are at least partially located in the corresponding partition slots, and the plurality of auxiliary electrodes are correspondingly connected to the plurality of first electrodes.

[0018] Optionally, the first electrode includes: a first electrode body and a overlapping electrode, wherein the first electrode body is located in the area surrounded by the partition slot body, the overlapping electrode is distributed around the first electrode body, and at least a portion of the overlapping electrode is located in the partition slot body and overlaps with the auxiliary electrode located in the partition slot body;

[0019] Wherein, the first electrode body is connected to the bonding electrode.

[0020] Optionally, within the partition groove body, the peripheral portion of the light-emitting portion is in direct contact with the auxiliary electrode; in a direction parallel to the driving backplane and perpendicular to the extension direction of the partition groove body, a side of the auxiliary electrode close to the pixel opening protrudes beyond a side of the peripheral portion close to the pixel opening;

[0021] In which, the light-emitting body part in the light-emitting part is disconnected between the side of the light-emitting body part away from the pixel opening and the side of the peripheral part in the light-emitting part close to the pixel opening, and the overlapping electrode passes through the disconnected area between the light-emitting body part and the peripheral part, and is overlapped with the auxiliary electrode.

[0022] Optionally, the overlapping electrode includes: an overlapping portion and a transition portion connected to each other;

[0023] The transition portion is located on a side of the peripheral portion away from the auxiliary electrode and is connected to the first electrode body;

[0024] The overlapping portion is located in a region separated from the light emitting body portion and the peripheral portion, and overlaps the auxiliary electrode.

[0025] Optionally, the display panel further comprises: a plurality of separately arranged second electrodes; the plurality of second electrodes correspond to the plurality of pixel openings and to the plurality of light-emitting portions; the orthographic projections of the pixel openings on the driving backplane are located within the orthographic projections of the corresponding second electrodes on the driving backplane, and the second electrodes are located on a side of the corresponding light-emitting portion facing the driving backplane, and the second electrodes are in direct contact with a portion of the corresponding light-emitting portion located within the corresponding pixel opening;

[0026] The driving backplane includes: a substrate, and a plurality of pixel driving circuits located on one side of the substrate; the plurality of pixel driving circuits are electrically connected to a plurality of second electrodes correspondingly.

[0027] Optionally, the auxiliary electrode and the second electrode are provided in the same layer and are made of the same material;

[0028] Alternatively, the pixel driving circuit has a signal output electrode, and the signal output electrode is electrically connected to the second electrode; the auxiliary electrode and the signal output electrode are provided in the same layer and are made of the same material.

[0029] Optionally, a plurality of the partition troughs are arranged separately; or, two adjacent partition troughs are arranged in communication.

[0030] Optionally, when two adjacent partition grooves are connected, there is a first gap between two adjacent inorganic protection parts, and / or there is a second gap between two adjacent light-emitting parts; or, the two second inorganic parts in two adjacent inorganic protection parts are stacked, and / or, the two outer parts in two adjacent light-emitting parts are stacked.

[0031] Optionally, the pixel definition layer is a film layer made of an inorganic material, and the display panel further comprises: an organic planar layer, the organic planar layer being located on a side of the pixel definition layer facing the driving backplane;

[0032] The partition groove body includes: a first through groove and a second through groove that are connected to each other, the first through groove penetrates the pixel definition layer, the second through groove penetrates the organic planar layer, the orthographic projection of the first through groove on the driving backplane is located within the orthographic projection of the second through groove on the driving backplane, and the boundary of the orthographic projection of the first through groove on the driving backplane does not overlap with the boundary of the orthographic projection of the second through groove on the driving backplane.

[0033] In another aspect, a method for manufacturing a display panel is provided, wherein the method is used for any of the above-mentioned display panels; the plurality of light-emitting portions include: a plurality of first light-emitting portions, a plurality of second light-emitting portions, and a plurality of third light-emitting portions; the method comprises:

[0034] forming a pixel definition layer on one side of the driving backplane;

[0035] forming the plurality of first light-emitting portions on a side of the pixel definition layer away from the driving backplane, and forming corresponding inorganic protection portions on a side of the first light-emitting portion away from the driving backplane;

[0036] forming the plurality of second light-emitting portions on the driving backplane on which the plurality of first light-emitting portions are formed, and forming corresponding inorganic protective portions on a side of the second light-emitting portion away from the driving backplane;

[0037] The plurality of third light emitting portions are formed on a driving backplane on which the plurality of first light emitting portions and the plurality of second light emitting portions are formed, and corresponding inorganic protective portions are formed on a side of the third light emitting portion away from the driving backplane.

[0038] On the other hand, a display device is provided, comprising: a power supply component and any of the above-mentioned display panels, wherein the power supply component is used to supply power to the display panel.

[0039] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0040] Since the pixel definition layer has multiple partition grooves, and the partition grooves can disconnect the portion of the light-emitting portion located in the area enclosed by the partition grooves from the portion of the light-emitting portion located within the partition grooves, the inorganic protection portion can independently encapsulate the corresponding light-emitting portion, and each light-emitting portion, as well as the inorganic protection portion located on the side of the light-emitting portion away from the driving backplane, can be formed through a single patterning process. Therefore, during the etching process, the partition grooves and the inorganic protection portion can prevent water vapor and oxygen from corroding the portion of the light-emitting portion located in the area enclosed by the partition grooves from the side and front, thereby improving the yield of the display panel and ensuring the reliability of the display panel. In this way, the display panel does not need FMM when forming R, G, and B sub-pixels, thereby removing the limitation of the FMM evaporation process accuracy on the PPI and aperture ratio of the display panel, effectively improving the PPI and aperture ratio of the display panel, and making the display effect of the display panel better. At the same time, it can also reduce the production cost of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0042] Figure 1 This is a schematic diagram of a partial film layer structure of a display panel provided in an embodiment of the present application;

[0043] Figure 2 is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application;

[0044] Figure 3 This is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application;

[0045] Figure 4 is a schematic diagram of a top view of a display panel provided in an embodiment of the present application;

[0046] Figure 5 This is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application;

[0047] Figure 6 This is an enlarged schematic diagram of a display panel at a partition groove provided by an embodiment of the present application;

[0048] Figure 7 This is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application;

[0049] Figure 8This is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application;

[0050] Figure 9 This is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application;

[0051] Figure 10 This is a schematic diagram of a partial film layer structure of a driving backplane provided in an embodiment of the present application;

[0052] Figure 11 is a schematic diagram of a partial film layer structure of the display panel after step S200;

[0053] Figure 12 is a schematic diagram of a partial film layer structure of the display panel after step S300;

[0054] Figure 13 is a schematic diagram of a partial film layer structure of the display panel after step S400;

[0055] Figure 14 is a schematic diagram of a partial film layer structure of the display panel after step S500;

[0056] Figure 15 is a schematic diagram of a partial film layer structure of the display panel after step S601;

[0057] Figure 16 This is a schematic diagram of an evaporation process provided in an embodiment of the present application;

[0058] Figure 17 is a schematic diagram of a partial film layer structure of the display panel after step S602;

[0059] Figure 18 is a schematic diagram of a partial film layer structure of the display panel after step S605;

[0060] Figure 19 is a schematic diagram of a partial film layer structure of the display panel after step S606;

[0061] Figure 20 is a schematic diagram of a partial film layer structure of the display panel after step S800;

[0062] Figure 21 FIG. 1 is a schematic diagram of a partial film layer structure of the display panel after step S900 . DETAILED DESCRIPTION

[0063] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0064] Please refer to Figure 1 , Figure 1Schematic diagram of a partial film structure of a display panel provided by an embodiment of the present application. The display panel 000 may include: a driving backplane 100, a pixel definition layer 200, a plurality of light-emitting portions 300, and a plurality of inorganic protection portions 400.

[0065] The pixel definition layer 200 in the display panel 000 is located on one side of the driving backplane 100, and the pixel definition layer 200 has a plurality of pixel openings K1 and a plurality of partition grooves K2 corresponding to the plurality of pixel openings K1, and the partition grooves K2 are distributed around the corresponding pixel openings K1.

[0066] The multiple light-emitting portions 300 in the display panel 000 are separately arranged and are all located on the side of the pixel definition layer 200 away from the driving backplane 100. The multiple light-emitting portions 300 correspond to the multiple pixel openings K1, a portion of the light-emitting portion 300 is located inside the corresponding pixel opening K1, and another portion is located outside the corresponding pixel opening K1, and the portion of the light-emitting portion 300 located outside the corresponding pixel opening K1 is separated by the partition groove K2. Here, the portion of the light-emitting portion 300 located inside the pixel opening K1 is a light-emitting area that can emit light, while the portion of the light-emitting portion 300 located outside the pixel opening K1 cannot emit light. In addition, the multiple light-emitting portions 300 in the display panel 000 can correspond to multiple R, G, and B sub-pixels in the display panel 000.

[0067] The multiple inorganic protection parts 400 in the display panel 000 are separately arranged, and the multiple inorganic protection parts 400 correspond to the multiple light-emitting parts 300. The inorganic protection parts 400 are located on the side of the corresponding light-emitting part 300 away from the driving backplane 100. The inorganic protection parts 400 cover the part of the light-emitting part 300 that is located in the area enclosed by the partition groove body K2.

[0068] In this case, since the partition trough K2 can disconnect the portion of the light-emitting portion 300 located within the area enclosed by the partition trough K2 from the portion of the light-emitting portion 300 located within the partition trough K2, the inorganic protective portion 400 can independently encapsulate the light-emitting area of ​​the corresponding light-emitting portion 300 that can emit light, and each light-emitting portion 300, as well as the inorganic protective portion 400 located on the side of the light-emitting portion 300 away from the driving backplane 100, can be formed by a single patterning process. Here, a single patterning process may include: photoresist coating, exposure, development, etching, and photoresist stripping. Therefore, during the etching process, the partition trough K2 and the inorganic protective portion 400 can prevent water vapor and oxygen from corroding the portion of the light-emitting portion 300 located within the area enclosed by the partition trough K2 from the side and front, thereby improving the yield of the display panel 000 and ensuring the reliability of the display panel 000.

[0069] In this way, the display panel 000 can form the light-emitting portions of the R, G, and B sub-pixels without the need for an FMM. This eliminates the limitations imposed by the FMM evaporation process accuracy on the PPI and aperture ratio of the display panel 000, effectively improving the PPI and aperture ratio of the display panel 000 and providing a better display quality. Furthermore, the production cost of the display panel 000 can be reduced.

[0070] In summary, an embodiment of the present application provides a display panel comprising: a driver backplane, a pixel definition layer, multiple light-emitting portions, and multiple inorganic protective portions. Because the pixel definition layer has multiple partitioning grooves, and the partitioning grooves can disconnect the portion of the light-emitting portion located within the area enclosed by the partitioning grooves from the portion of the light-emitting portion located within the partitioning grooves, the inorganic protective portion can independently encapsulate the corresponding light-emitting portion, and each light-emitting portion, as well as the inorganic protective portion located on the side of the light-emitting portion facing away from the driver backplane, can be formed through a single patterning process. Therefore, during the etching process, the partitioning grooves and the inorganic protective portion can prevent water vapor and oxygen from corroding the portion of the light-emitting portion located within the area enclosed by the partitioning grooves from the side and front, thereby improving the yield of the display panel and ensuring the reliability of the display panel. In this way, when forming the R, G, and B sub-pixels on the display panel, FMMs are no longer required, thereby eliminating the limitations of the FMM evaporation process accuracy on the PPI and aperture ratio of the display panel, effectively improving the PPI and aperture ratio of the display panel, and achieving a better display effect of the display panel. At the same time, the production cost of the display panel can also be reduced.

[0071] Please refer to Figure 2 , Figure 2 Schematic diagram of a partial film layer structure of another display panel provided by an embodiment of the present application. The inorganic protective portion 400 includes: a first inorganic portion 401 and a second inorganic portion 402. The first inorganic portion 401 is located in the area surrounded by the partition groove body K2; the second inorganic portion 402 is located outside the first inorganic portion 401, and the orthographic projection of the second inorganic portion 402 on the driving backplane 100 overlaps with the orthographic projection of the partition groove body K2 on the driving backplane 100. In some possible implementations, such as Figure 2 As shown, the orthographic projection of the second inorganic portion 402 on the driving backplate 100 can cover the orthographic projection of the partition groove body K2 on the driving backplate 100 .

[0072] The first inorganic part 401 and the second inorganic part 402 are connected.

[0073] In this way, the inorganic protective part 400 can cover the portion of the light-emitting part 300 that is located in the area surrounded by the partition groove body K2, and then encapsulate the light-emitting area in the light-emitting part 300 that can emit light, thereby preventing water vapor and oxygen from corroding the light-emitting area in the light-emitting part 300 from the front, thereby improving the yield of the display panel 000 and ensuring the reliability of the display panel 000.

[0074] like Figure 2 As shown, the light-emitting portion 300 includes a light-emitting body portion 301 and a peripheral portion 302. The light-emitting body portion 301 is located within the area enclosed by the partition groove K2. The peripheral portion 302 is distributed around the light-emitting body portion 301, and at least a portion of the peripheral portion 302 is located within the partition groove K2. The peripheral portion 302 is disconnected from the light-emitting body portion 301 near the inner side of the pixel opening K1.

[0075] The orthographic projection of the second inorganic portion 402 on the driving backplate 100 covers the orthographic projection of the peripheral portion 302 on the driving backplate 100 .

[0076] In this way, the partition groove K2 can separate the outer portion 302 of the light-emitting unit 300 from the light-emitting body 301, preventing moisture and oxygen from corroding the light-emitting body 301 of the light-emitting unit 300 from the side. The light-emitting area of ​​the light-emitting unit 300 is located within the light-emitting body 301. By separating the outer portion 302 from the light-emitting body 301, moisture and oxygen can be prevented from corroding the light-emitting area of ​​the light-emitting unit 300 from the side.

[0077] like Figure 2 As shown, the display panel 000 may further include: a plurality of first electrodes 500 disposed separately, and the plurality of first electrodes 500 are connected in series. The plurality of first electrodes 500 correspond to the plurality of light-emitting portions 300 and the plurality of inorganic protective portions 400. The first electrodes 500 are located on the side of the corresponding light-emitting portion 300 facing away from the driving backplane 100, and on the side of the corresponding inorganic protective portion 400 facing the driving backplane 100.

[0078] The display panel 000 may further include: a plurality of separately arranged second electrodes 600, the plurality of second electrodes 600 corresponding to the plurality of pixel openings K1 and the plurality of light-emitting portions 300. The orthographic projection of the pixel opening K1 on the driving backplane 100 is located within the orthographic projection of the corresponding second electrode 600 on the driving backplane 100, and the second electrode 600 is located on the side of the corresponding light-emitting portion 300 facing the driving backplane 100, and the second electrode 600 is in direct contact with the portion of the corresponding light-emitting portion 300 located within the corresponding pixel opening K1.

[0079] In this way, for any pixel opening K1, the second electrode 600 corresponding to this pixel opening K1, the portion of the light-emitting portion 300 located in this pixel opening K1 and in direct contact with the second electrode 600, and the portion of the first electrode 500 located in this pixel opening K1 can form a light-emitting device Q.

[0080] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a partial film layer structure of another display panel provided by an embodiment of the present application. The driving backplane 100 in the display panel 000 includes a substrate 101 and multiple pixel driving circuits P located on one side of the substrate 101. The multiple pixel driving circuits P are electrically connected to the multiple second electrodes 600, thereby enabling the pixel driving circuits P to drive the light-emitting devices Q to emit light.

[0081] In the embodiment of the present application, the partition tank K2 can have a variety of possible implementation methods. For example, please refer to Figure 3 and Figure 4 , Figure 4 is a schematic diagram of a top view of a display panel provided in an embodiment of the present application. Figure 3 Can be regarded as Figure 4 A schematic cross-sectional view taken at AA' in FIG. The display panel 000 may further include: an organic planar layer 700, the organic planar layer 700 being located on the side of the pixel definition layer 200 facing the driver backplane 100. The partition groove body K2 may include: a first through groove K21 and a second through groove K22 that are connected to each other, the first through groove K21 penetrating the pixel definition layer 200, the second through groove K22 penetrating the organic planar layer 700, the orthographic projection of the first through groove K21 on the driver backplane 100 being located within the orthographic projection of the second through groove K22 on the driver backplane 100, and the boundary of the orthographic projection of the first through groove K21 on the driver backplane 100 does not overlap with the boundary of the orthographic projection of the second through groove K22 on the driver backplane 100.

[0082] Here, the pixel definition layer 200 may be a film layer made of an inorganic material, for example, the pixel definition layer 200 may be a film layer made of a silicon nitride material. The organic planarization layer 700 may be a film layer made of an organic photoresist material.

[0083] In the embodiment of the present application, the driving backplane 100 may have a plurality of connected auxiliary electrodes 800. The plurality of auxiliary electrodes 800 correspond to the plurality of partitioning slots K2. The auxiliary electrodes 800 are at least partially located within the corresponding partitioning slots K2. The plurality of auxiliary electrodes 800 are correspondingly connected to the plurality of first electrodes 500. In this case, the plurality of first electrodes 500 may be connected in series via the auxiliary electrodes 800, thereby ensuring that the voltages of the plurality of first electrodes 500 in the display panel 000 are equal, so that the plurality of light-emitting devices Q in the display panel 000 share a common electrode.

[0084] It should be noted that the auxiliary electrode 800 is at least partially located in the corresponding partition groove K2, which may be implemented in a variety of ways.

[0085] Exemplarily, in one possible case, the auxiliary electrode 800 is located in the corresponding partition groove body K2 and is distributed around the pixel opening K1. The orthographic projection of the second through groove K22 in the partition groove body K2 on the driving backplane 100 is located in the orthographic projection of the corresponding auxiliary electrode 800 on the driving backplane 100. The boundary of the orthographic projection of the auxiliary electrode 800 on the driving backplane 100 and the boundary of the orthographic projection of the second through groove K22 in the partition groove body K2 on the driving backplane 100 may coincide with each other; or, they may not coincide with each other.

[0086] In another possible case, the auxiliary electrode 800 is located in a partial area of ​​the corresponding partition slot body K2, and the boundary of the positive projection of the auxiliary electrode 800 on the driving back plate 100 may partially overlap with the boundary of the positive projection of the second through groove K22 in the partition slot body K2 on the driving back plate 100; or, they may not overlap.

[0087] It should also be noted that the display panel 000 may further include a low-level power line (not shown in the figure), which is electrically connected to the plurality of first electrodes 500 and is used to apply a low-level power signal to the first electrodes 500. Since the plurality of first electrodes 500 overlap the plurality of auxiliary electrodes 800, the plurality of auxiliary electrodes 800 can be electrically connected to the low-level power line, thereby achieving electrical connection between the plurality of first electrodes 500 and the low-level power line.

[0088] Please refer to Figure 5 , Figure 5 This is a schematic diagram of a partial film layer structure of another display panel provided in an embodiment of the present application. The first electrode 500 may include a first electrode body 501 and a bonding electrode 502. The first electrode body 501 is located within the region enclosed by the partitioning groove K2. The bonding electrode 502 is distributed around the first electrode body 501. At least a portion of the bonding electrode 502 is located within the partitioning groove K2 and bonds with the auxiliary electrode 800 located within the partitioning groove K2.

[0089] The first electrode body 501 is connected to the bonding electrode 502. The portion of the first electrode body 501 located within the pixel opening K1 can be used to form the light-emitting device Q. The bonding electrode 502 is bonded to the auxiliary electrode 800 and connected to the first electrode body 501, enabling multiple first electrodes 500 to be connected in series and providing a low-level power signal to the light-emitting device Q.

[0090] In the partition groove body K2, the peripheral portion 302 of the light emitting portion 300 is in direct contact with the auxiliary electrode 800, and in a direction parallel to the driving backplane 100 and perpendicular to the extending direction of the partition groove body K2, the side of the auxiliary electrode 800 close to the pixel opening K1 protrudes from the side of the peripheral portion 302 close to the pixel opening K1. For example, Figure 5 In the schematic structural diagram, the first direction X is parallel to the driving backplane 100 and perpendicular to the extension direction of the partitioning groove body K2. In the first direction X, the side of the auxiliary electrode 800 near the pixel opening K1 protrudes beyond the side of the peripheral portion 302 near the pixel opening K1. In this case, on the side of the partitioning groove body K2 near the corresponding pixel opening K1, a third gap exists between the sidewall of the peripheral portion 302 and the sidewall of the second through-groove K22.

[0091] The side of the light-emitting body portion 301 in the light-emitting portion 300 facing away from the pixel opening K1 is disconnected from the side of the peripheral portion 302 in the light-emitting portion 300 close to the pixel opening K1. The bonding electrode 502 passes through the disconnected region between the light-emitting body portion 301 and the peripheral portion 302 and then bonds with the auxiliary electrode 800. In other words, at least a portion of the bonding electrode 502 is located within the third gap, and this portion of the bonding electrode 502 is in direct contact with the auxiliary electrode 800.

[0092] The overlapping electrode 502 may include a connected overlapping portion 5021 and a transition portion 5022. The transition portion 5022 is located on a side of the peripheral portion 302 facing away from the auxiliary electrode 800 and is connected to the first electrode body 501. The overlapping portion 5021 is located in the region separated from the light-emitting body portion 301 and the peripheral portion 302 and overlaps the auxiliary electrode 800.

[0093] Please refer to Figure 6 , Figure 6 This is an enlarged schematic diagram of a display panel provided in an embodiment of the present application at the partition trough. Since the first electrode 500 can be formed through an evaporation process, to prevent the first electrode 500 from being blocked by the partition trough K2 and to ensure that the first electrode body 501 is connected to the strapping electrode 502, for any partition trough K2, in a direction perpendicular to the drive backplane 100, the thickness H1 of the auxiliary electrode 800 located within the partition trough K2, the thickness H2 of the portion of the peripheral portion 302 located within the partition trough K2, the maximum thickness H3 of the transition portion 5022 located within the partition trough K2, and the thickness H4 of the organic planarization layer 700 must satisfy the following requirements: H1+H2+H3≥H4.

[0094] In the embodiment of the present application, a plurality of partition troughs K2 may be provided separately; or, two adjacent partition troughs K2 may be provided in a connected manner.

[0095] Please refer to Figure 7 , Figure 7 This is a schematic diagram of a partial film layer structure of another display panel provided by an embodiment of the present application. When multiple partitioning grooves K2 are separately arranged, the peripheral portion 302 of the light-emitting portion 300 may include a first portion 3021 and a second portion 3022. The first portion 3021 is located within the partitioning grooves K2, while the second portion 3022 is located on the sidewall of the first through-groove K21 away from the light-emitting portion 301 and on the side of the pixel definition layer 200 facing away from the driver backplane 100. Furthermore, the first portion 3021 and the second portion 3022 of the peripheral portion 302 are disconnected.

[0096] In the first direction X, the side of the auxiliary electrode 800 near the pixel opening K1 protrudes beyond the side of the peripheral portion 302 near the pixel opening K1, and / or the side of the auxiliary electrode 800 away from the pixel opening K1 protrudes beyond the side of the peripheral portion 302 away from the pixel opening K1. That is, in the first direction X, the width of the auxiliary electrode 800 can be greater than the width of the first portion 3021. In this case, on the side of the partition groove body K2 away from the corresponding pixel opening K1, a fourth gap exists between the sidewall of the peripheral portion 302 and the sidewall of the second through-groove K22. Thus, the bonding electrode 502 can further include a portion located within the fourth gap, and this portion of the bonding electrode 502 is in direct contact with the auxiliary electrode 800.

[0097] That is, when multiple partition grooves K2 are separately arranged, the overlapping electrode 502 in the first electrode 500 can cover the first part 3021 in the outer part 302 on both sides of the side wall of the partition groove K2, and cover the side of the first part 3021 away from the driving backplane 100.

[0098] Please refer to Figure 8 , Figure 8 This is a schematic diagram of a partial film layer structure of another display panel provided by an embodiment of the present application. When two adjacent partitioning slots K2 are connected, the peripheral portion 302 of the light-emitting portion 300 is located within the partitioning slots K2. In the first direction X, the side of the auxiliary electrode 800 near the pixel opening K1 protrudes beyond the side of the peripheral portion 302 near the pixel opening K1. A gap is formed between the side of the light-emitting body 301 of the light-emitting portion 300 facing away from the pixel opening K1 and the side of the peripheral portion 302 near the pixel opening K1. The bonding electrode 502 passes through the gap between the light-emitting body 301 and the peripheral portion 302 and then bonds with the auxiliary electrode 800.

[0099] Two adjacent first electrodes 500 may be connected to the same auxiliary electrode 800 at the connection point between two adjacent partitioning slots K2 .

[0100] It should be noted that, when two adjacent partition tanks K2 are connected, Figure 8 As shown, a first gap may exist between two adjacent inorganic protection portions 400 , and / or a second gap may exist between the peripheral portions 302 of two adjacent light emitting portions 300 .

[0101] Alternatively, please refer to Figure 9 , Figure 9 The two second inorganic portions 402 in two adjacent inorganic protective portions 400 can be stacked, and / or the two peripheral portions 302 in two adjacent light-emitting portions 300 can be stacked.

[0102] It should also be noted that, when two adjacent partition grooves K2 are connected, the distance between two adjacent pixel openings K1 can be further reduced, which is beneficial to further improve the PPI and aperture ratio of the display panel 000.

[0103] In the embodiment of the present application, the auxiliary electrode 800 can be provided in the same layer as the second electrode 600 and made of the same material.

[0104] Alternatively, the pixel driving circuit P has a signal output electrode, the signal output electrode is electrically connected to the second electrode 600 , and the auxiliary electrode 800 is provided in the same layer as the signal output electrode and is made of the same material.

[0105] like Figure 3 、 Figure 5 、 Figures 7 to 9 As shown, the pixel driving circuit P may include: at least two transistors and at least one storage capacitor.

[0106] The storage capacitor may include a first capacitor electrode C1 and a second capacitor electrode C2 disposed opposite each other. The transistor may include an active layer Act, a gate G, a source electrode S, and a drain electrode D. The active layer Act may be insulated from the gate G, and both the source electrode S and the drain electrode D may overlap the active layer Act. The source electrode S may be electrically connected to a data line, and the drain electrode D may be electrically connected to the second electrode 600 of the light-emitting device Q.

[0107] The driving backplane 100 may further include: multiple inorganic insulating layers, for example, a buffer layer 102 located between the substrate 101 and the active layer Act, a first gate insulating layer 103 located between the active layer Act and the gate G, a second gate insulating layer 104 located between the gate G and the second capacitor electrode C2, an interlayer dielectric layer 105 located between the second capacitor electrode C2 and the source electrode S, and a passivation layer 106 located on the side of the source electrode S facing away from the substrate 101.

[0108] It should be noted that there are many possible implementations of the signal output electrode of the pixel driving circuit P. For example, Figure 5 As shown, the drain electrode D may be directly connected to the second electrode 600. In this case, the signal output electrode of the pixel driving circuit P is the drain electrode D. In this case, the auxiliary electrode 800 may be provided in the same layer as the drain electrode D and made of the same material.

[0109] Or, as Figure 9 As shown, the pixel driving circuit P may further include: a transfer electrode Z, the drain D may be overlapped with the transfer electrode Z, and the transfer electrode Z may be overlapped with the second electrode 600, thereby realizing electrical connection between the drain D and the second electrode 600. In this case, the signal output electrode of the pixel driving circuit P is the transfer electrode Z. The auxiliary electrode 800 may be provided in the same layer as the transfer electrode Z and made of the same material, and / or the auxiliary electrode 800 may be provided in the same layer as the drain D and made of the same material. Here, the transfer electrode Z may be a single-layer structure or a multi-layer structure, and the present application does not impose any restrictions on this. The embodiments of the present application are all schematically described using the transfer electrode Z as a single-layer structure as an example.

[0110] It should also be noted that if Figure 5 As shown, when the drain D is directly overlapped with the second electrode 600, the driving backplane 100 may further include: a first flat layer 900, the first flat layer 900 is located on the side of the passivation layer 106 away from the substrate 101, and the second electrode 600 is located on the side of the first flat layer 900 away from the driving backplane 100, and is in direct contact with the first flat layer 900.

[0111] The auxiliary electrode 800 is provided in the same layer and made of the same material as the drain electrode D. The organic planarization layer 700 is the first planarization layer 900, and the second through-groove K22 penetrates the first planarization layer 900. In this case, the passivation layer 106 may have a third through-groove communicating with the partition groove body K2. The orthographic projection of the second through-groove K22 on the substrate 101 is located within the orthographic projection of the third through-groove on the substrate 101, thereby ensuring that the first electrode 500 can overlap with the auxiliary electrode 800.

[0112] like Figure 9 As shown, when the pixel driving circuit P further includes a transfer electrode Z, the driving backplane 100 may further include: a first planar layer 900 and a second planar layer 1000. The first planar layer 900 is located on the side of the passivation layer 106 facing away from the substrate 101, the transfer electrode Z is located on the side of the first planar layer 900 facing away from the driving backplane 100, the second planar layer 1000 is located on the side of the transfer electrode Z facing away from the driving backplane 100, and the second electrode 600 is located on the side of the second planar layer 1000 facing away from the driving backplane 100, and is in direct contact with the second planar layer 1000.

[0113] In one possible implementation, the auxiliary electrode 800 is disposed in the same layer as the drain electrode D and is made of the same material. The organic planar layer 700 is the first planar layer 900 and the second planar layer 1000. The second through-trench K22 penetrates the first planar layer 900 and the second planar layer 1000. In this case, the passivation layer 106 may have a third through-trench connected to the partitioning groove body K2. The orthographic projection of the second through-trench K22 on the substrate 101 is located within the orthographic projection of the third through-trench on the substrate 101, thereby ensuring that the first electrode 500 can overlap with the auxiliary electrode 800.

[0114] In another possible implementation, Figure 9 As shown, the auxiliary electrode 800 and the transfer electrode Z are provided in the same layer and made of the same material, the organic planar layer 700 is the second planar layer 1000 , and the second through groove K22 penetrates the second planar layer 1000 .

[0115] In summary, an embodiment of the present application provides a display panel comprising: a driver backplane, a pixel definition layer, multiple light-emitting portions, and multiple inorganic protective portions. Because the pixel definition layer has multiple partitioning grooves, and the partitioning grooves can disconnect the portion of the light-emitting portion located within the area enclosed by the partitioning grooves from the portion of the light-emitting portion located within the partitioning grooves, the inorganic protective portion can independently encapsulate the corresponding light-emitting portion, and each light-emitting portion, as well as the inorganic protective portion located on the side of the light-emitting portion facing away from the driver backplane, can be formed through a single patterning process. Therefore, during the etching process, the partitioning grooves and the inorganic protective portion can prevent water vapor and oxygen from corroding the portion of the light-emitting portion located within the area enclosed by the partitioning grooves from the side and front, thereby improving the yield of the display panel and ensuring the reliability of the display panel. In this way, when forming the R, G, and B sub-pixels on the display panel, FMMs are no longer required, thereby eliminating the limitations of the FMM evaporation process accuracy on the PPI and aperture ratio of the display panel, effectively improving the PPI and aperture ratio of the display panel, and achieving a better display effect of the display panel. At the same time, the production cost of the display panel can also be reduced.

[0116] The present application also provides a method for manufacturing a display panel, which can be used to manufacture the display panel 000 in the above embodiment. Figure 4 As shown, the multiple light-emitting units 300 in the display panel 000 may include: multiple first light-emitting units 300a, multiple second light-emitting units 300b, and multiple third light-emitting units 300c. The multiple light-emitting units 300 in the display panel 000 may correspond to multiple R, G, and B sub-pixels in the display panel 000. For example, the first light-emitting unit 300a may be a light-emitting unit in an R sub-pixel, the second light-emitting unit 300b may be a light-emitting unit in a G sub-pixel, and the third light-emitting unit 300c may be a light-emitting unit in a B sub-pixel.

[0117] The method may include:

[0118] Step S1: forming a pixel definition layer on one side of the driving backplane.

[0119] Here, the pixel definition layer 200 may have a plurality of pixel openings K1 and a plurality of partitioning grooves K2 corresponding to the plurality of pixel openings K1 , and the partitioning grooves K2 are distributed around the corresponding pixel openings K1 .

[0120] Step S2: forming a plurality of first light-emitting portions on a side of the pixel definition layer away from the driving backplane, and forming corresponding inorganic protection portions on a side of the first light-emitting portion away from the driving backplane.

[0121] Here, the plurality of first light-emitting portions 300a are separately arranged and are all located on the side of the pixel definition layer 200 facing away from the driving backplane 100. The plurality of first light-emitting portions 300a correspond to at least part of the plurality of pixel openings K1. A portion of the first light-emitting portion 300a is located within the corresponding pixel opening K1, and another portion is located outside the corresponding pixel opening K1. The portion of the first light-emitting portion 300a located outside the corresponding pixel opening K1 is separated by the partition groove K2. Here, the portion of the first light-emitting portion 300a located within the pixel opening K1 is a light-emitting area capable of emitting light, while the portion of the first light-emitting portion 300a located outside the pixel opening K1 cannot emit light. In addition, the plurality of first light-emitting portions 300a in the display panel 000 can correspond to the plurality of R sub-pixels in the display panel 000.

[0122] The multiple inorganic protection parts 400 corresponding to the multiple first light-emitting parts 300a are separately arranged. The inorganic protection parts 400 are located on the side of the corresponding first light-emitting part 300a away from the driving backplane 100, and the inorganic protection parts 400 cover the part of the first light-emitting part 300a located in the area surrounded by the partition groove body K2.

[0123] Step S3: forming a plurality of second light-emitting portions on the driving backplane formed with the plurality of first light-emitting portions, and forming corresponding inorganic protective portions on a side of the second light-emitting portion away from the driving backplane.

[0124] Here, the plurality of second light-emitting portions 300b are separately arranged and are all located on the side of the pixel definition layer 200 facing away from the driving backplane 100. The plurality of second light-emitting portions 300b correspond to at least part of the plurality of pixel openings K1. A portion of the second light-emitting portion 300b is located within the corresponding pixel opening K1, and another portion is located outside the corresponding pixel opening K1. The portion of the second light-emitting portion 300b located outside the corresponding pixel opening K1 is separated by the partition groove K2. Here, the portion of the second light-emitting portion 300b located within the pixel opening K1 is a light-emitting area capable of emitting light, while the portion of the second light-emitting portion 300b located outside the pixel opening K1 is unable to emit light. In addition, the plurality of second light-emitting portions 300b in the display panel 000 can correspond to the plurality of G sub-pixels in the display panel 000.

[0125] The multiple inorganic protection parts 400 corresponding to the multiple second light-emitting parts 300b are separately arranged. The inorganic protection part 400 is located on the side of the corresponding second light-emitting part 300b away from the driving backplane 100, and the inorganic protection part 400 covers the part of the second light-emitting part 300b located in the area surrounded by the partition groove K2.

[0126] Step S4: forming a plurality of third light-emitting portions on the driving backplane on which the plurality of first light-emitting portions and the plurality of second light-emitting portions are formed, and forming corresponding inorganic protective portions on a side of the third light-emitting portion away from the driving backplane.

[0127] Here, the plurality of third light-emitting portions 300c are separately arranged and are all located on the side of the pixel definition layer 200 facing away from the driver backplane 100. The plurality of third light-emitting portions 300c correspond to at least part of the plurality of pixel openings K1. A portion of the third light-emitting portion 300c is located within the corresponding pixel opening K1, and another portion is located outside the corresponding pixel opening K1. The portion of the third light-emitting portion 300c located outside the corresponding pixel opening K1 is separated by the partition groove K2. Here, the portion of the third light-emitting portion 300c located within the pixel opening K1 is a light-emitting area capable of emitting light, while the portion of the third light-emitting portion 300c located outside the pixel opening K1 is unable to emit light. In addition, the plurality of third light-emitting portions 300c in the display panel 000 can correspond to the plurality of B sub-pixels in the display panel 000.

[0128] The multiple inorganic protection parts 400 corresponding to the multiple third light-emitting parts 300c are separately arranged. The inorganic protection parts 400 are located on the side of the corresponding third light-emitting parts 300c away from the driving backplane 100, and the inorganic protection parts 400 cover the part of the third light-emitting parts 300c located in the area surrounded by the partition groove body K2.

[0129] Because the partition trough K2 can disconnect the portion of the light-emitting portion 300 within the area enclosed by the partition trough K2 from the portion of the light-emitting portion 300 within the partition trough K2, the inorganic protective portion 400 can independently encapsulate the light-emitting area of ​​the corresponding light-emitting portion 300, and each light-emitting portion 300 and the inorganic protective portion 400 located on the side of the light-emitting portion 300 facing away from the driver backplane 100 can be formed through a single patterning process. Therefore, during the etching process, water vapor and oxygen can be prevented from corroding the portion of the light-emitting portion 300 within the area enclosed by the partition trough K2 from the side and front, thereby improving the yield of the display panel 000 and ensuring the reliability of the display panel 000.

[0130] In this way, the display panel 000 can form the light-emitting portions of the R, G, and B sub-pixels without the need for an FMM. This eliminates the limitations imposed by the FMM evaporation process accuracy on the PPI and aperture ratio of the display panel 000, effectively improving the PPI and aperture ratio of the display panel 000 and providing a better display quality. Furthermore, the production cost of the display panel 000 can be reduced.

[0131] In summary, an embodiment of the present application provides a method for preparing a display panel, the method comprising: forming a plurality of partition troughs on one side of a driving backplane, forming a plurality of light-emitting portions on the side of the plurality of partition troughs away from the driving backplane, and a first electrode and an inorganic protective portion corresponding to the light-emitting portion. During the etching process, the partition troughs and the inorganic protective portion can prevent water vapor and oxygen from corroding the portion of the light-emitting portion located within the area enclosed by the partition troughs from the side and front, thereby improving the yield of the display panel and ensuring the reliability of the display panel. In this way, the display panel does not require FMM when forming R, G, and B sub-pixels, thereby effectively improving the PPI and aperture ratio of the display panel, so that the display effect of the display panel is better. At the same time, the production cost of the display panel can also be reduced.

[0132] It should be noted that in the description of the embodiment of the structure of the display panel 000, since the auxiliary electrode 800 can have multiple possible implementations, the steps of the method for preparing the display panel 000 vary slightly in different implementations. With reference to the embodiment of the structure of the display panel 000 and the detailed description of the preparation method below, those skilled in the art can clearly understand and implement it. For the convenience and simplicity of description, this application only uses the example of the driving backplane 100 including the transfer electrode Z, and the auxiliary electrode 800 and the transfer electrode Z are arranged in the same layer and made of the same material as the example for schematic description. When the driving backplane 100 includes the transfer electrode Z, and the auxiliary electrode 800 and the transfer electrode Z are arranged in the same layer and made of the same material, the organic planar layer 700 is the second planar layer 1000 in the display panel 000.

[0133] The preparation method may comprise the following steps:

[0134] Step S100: providing a driving backplane.

[0135] Here, a schematic diagram of a portion of the film structure of the driving backplane 100 is shown in FIG. Figure 10 The driving backplane 100 may include: a substrate 101 , a plurality of pixel driving circuits P located on one side of the substrate 101 , a plurality of inorganic insulating layers, a first planar layer 900 , and a plurality of auxiliary electrodes 800 .

[0136] The multi-layer inorganic insulating layer may include: a buffer layer 102 , a first gate insulating layer 103 , a second gate insulating layer 104 , an interlayer dielectric layer 105 and a passivation layer 106 .

[0137] Here, the switching electrode Z is used to overlap with the drain electrode D and overlap with the second electrode 600 to ensure that the pixel driving circuit P can drive the light-emitting device Q to emit light.

[0138] The plurality of auxiliary electrodes 800 are electrically connected to each other, and the auxiliary electrodes 800 are used to be electrically connected to the first electrodes 500 to ensure that the plurality of first electrodes 500 in the display panel 000 are connected in series.

[0139] Both the switching electrode Z and the auxiliary electrode 800 can be film layers made of titanium-aluminum-titanium material.

[0140] Step S200: forming a second planar layer on one side of the driving backplane.

[0141] The schematic diagram of the partial film structure of the display panel after step S200 is as follows: Figure 11 shown.

[0142] Here, the second planar layer 1000 has a plurality of first through holes 1000 a corresponding to the plurality of switching electrodes Z. The orthographic projections of the first through holes 1000 a on the driving backplane 100 are located within the orthographic projections of the corresponding switching electrodes Z on the driving backplane 100 .

[0143] The second planar layer 1000 may be a film layer made of an organic photoresist material.

[0144] Step S300 : forming a plurality of second electrodes on a side of the second planar layer away from the driving back plate.

[0145] The schematic diagram of the partial film structure of the display panel after step S300 is as follows: Figure 12 shown.

[0146] Here, the second electrode 600 is connected to the switching electrode Z through the first through hole 1000a. The second electrode 600 can be a film layer made of indium tin oxide (ITO)-silver (Ag)-indium tin oxide (ITO) material.

[0147] Step S400: forming a pixel definition layer on a side of the second electrode facing away from the driving backplane.

[0148] The schematic diagram of the partial film structure of the display panel after step S400 is as follows: Figure 13 shown.

[0149] Here, the pixel definition layer 200 has multiple pixel openings K1 and multiple first through grooves K21. The multiple pixel openings K1 correspond to the multiple second electrodes 600, and the orthographic projections of the pixel openings K1 on the driving backplane 100 are located within the orthographic projections of the corresponding second electrodes 600 on the driving backplane 100.

[0150] The plurality of first through-grooves K21 correspond to the plurality of pixel openings K1 and are distributed around the corresponding pixel openings K1. The orthographic projections of the first through-grooves K21 on the driving backplane 100 overlap with the orthographic projections of the auxiliary electrodes 800 on the substrate 101.

[0151] The plurality of first through-grooves K21 may be disposed separately, or two adjacent first through-grooves K21 may be disposed in communication.

[0152] Here, the pixel definition layer 200 may be a film layer made of an inorganic material. For example, the pixel definition layer 200 may be a film layer made of a silicon nitride material.

[0153] Step S500: over-etching the second planar layer to form a plurality of partition grooves.

[0154] The schematic diagram of the partial film structure of the display panel after step S500 is as follows: Figure 14 shown.

[0155] Here, the second planar layer 1000 is over-etched, so that the second planar layer 1000 has a plurality of second through-grooves K22. The plurality of second through-grooves K22 are correspondingly connected to the plurality of first through-grooves K21. The orthographic projections of the first through-grooves K21 on the driver backplate 100 are located within the orthographic projections of the second through-grooves K22 on the driver backplate 100. Moreover, the boundaries of the orthographic projections of the first through-grooves K21 on the driver backplate 100 do not overlap with the boundaries of the orthographic projections of the second through-grooves K22 on the driver backplate 100. Exemplarily, the second planar layer 1000 can be over-etched using a gas etching method.

[0156] The connected first through-groove K21 and the second through-groove K22 may be used to form a partitioning groove body K2 , and the auxiliary electrode 800 is at least partially located in the partitioning groove body K2 .

[0157] Step S600: forming a plurality of first light-emitting portions on a side of the partitioning tank away from the driving backplane, and forming corresponding first electrodes and an inorganic protective portion on a side of the first light-emitting portion away from the driving backplane.

[0158] Step S600 may specifically include:

[0159] Step S601: A first light-emitting film, a first conductive film, and a first inorganic protective film are sequentially formed on a side of the partitioning slot facing away from the driver backplane. The portion of the first light-emitting film located inside the partitioning slot is disconnected from the portion located outside the partitioning slot, while the portion of the first conductive film located inside the partitioning slot is connected to the portion located outside the partitioning slot.

[0160] The schematic diagram of the partial film structure of the display panel after step S601 is as follows: Figure 15 shown.

[0161] It should be noted that since the first light-emitting film 3001 and the first conductive film 5001 can both be formed by a whole-layer evaporation process, the portion of the first light-emitting film 3001 located inside the partition groove K2 can be disconnected from the portion of the first light-emitting film 3001 located outside the partition groove K2, thereby ensuring that the peripheral portion 302 of the subsequently formed first light-emitting portion 300a and the light-emitting main body portion 301 can be disconnected at the partition groove K2, thereby avoiding water vapor and oxygen from corroding the light-emitting main body portion 301 from the side during the etching process, affecting the yield of the display panel 000.

[0162] To ensure that the subsequently formed plurality of first electrodes 500 can overlap with the auxiliary electrode 800, thereby achieving a series connection of the plurality of first electrodes 500, the portion of the first conductive film 5001 located within the partitioning slot K2 should be connected to the portion of the first conductive film 5001 located outside the partitioning slot K2. This embodiment of the present application achieves this by rotating the backplane 100 during the vapor deposition of the first conductive film 5001 and controlling the vapor deposition angle and the thickness of the first conductive film 5001.

[0163] For example, please refer to Figure 16 , Figure 16 This is a schematic diagram of an evaporation process provided in an embodiment of the present application. Figure 16 Can be regarded as Figure 15Enlarged diagram at point B. In a direction perpendicular to the driving backplane 100, the thickness H1 of the auxiliary electrode 800, the thickness H2 of the portion of the first light-emitting film 3001 located within the partitioning groove K2, the maximum thickness H3 of the portion of the first conductive film 5001 located within the partitioning groove K2 and on the side of the first light-emitting film 3001 facing away from the driving backplane 100, and the thickness H4 of the organic planarizing layer 700 must satisfy the following relationship: H1+H2+H3≥H4.

[0164] In the partition groove K2, at least one of the side of the auxiliary electrode 800 close to the pixel opening K1 and the side of the auxiliary electrode 800 away from the pixel opening K1 protrudes from the portion of the first light-emitting film 3001 located in the partition groove K2. Figure 15 and Figure 16 As shown, within the partitioning groove K2, the side of the auxiliary electrode 800 close to the pixel opening K1 protrudes from the portion of the first light-emitting film 3001 located within the partitioning groove K2, and the width of the protruding portion in the first direction X can be w1. The side of the auxiliary electrode 800 away from the pixel opening K1 protrudes from the portion of the first light-emitting film 3001 located within the partitioning groove K2, and the width of the protruding portion in the first direction X can also be w1. For any partitioning groove K2, the evaporation angle θ needs to satisfy:

[0165]

[0166] Here, the evaporation angle θ refers to the angle between the evaporation beam emitted by the evaporation source S and the direction perpendicular to the driving backplane 100. The evaporation source S can be a point light source or a line light source, and this application does not impose any limitation on this.

[0167] When the first conductive film 5001 is continuously set, the first inorganic protective film 4001 formed on the side of the first conductive film 5001 away from the driving backplane 100 is also continuously set, that is, the first inorganic protective film 4001 can continuously cover the part of the first light-emitting film 3001 located in the area surrounded by the partition groove K2, thereby ensuring that the subsequently formed first inorganic protective part 400 can cover the part of the first light-emitting part 300a located in the area surrounded by the partition groove K2, avoiding water vapor and oxygen from corroding the first light-emitting part 300a and the first electrode 500 from the front during the etching process, thereby ensuring the yield of the display panel 000.

[0168] Here, the first light-emitting film 3001 can be used to form the first light-emitting portion 300a corresponding to the R pixel. The first conductive film 5001 can be a film layer made of a transparent metal material, such as a magnesium alloy, a silver alloy, or a magnesium-silver alloy. The first inorganic protective film 4001 can be a film layer made of an inorganic material, for example, a silicon nitride material.

[0169] Step S602 : forming a photoresist film on the first inorganic protective film, and performing exposure and development processing on the photoresist film to obtain a photoresist pattern.

[0170] Here, the photoresist pattern PR covers the area where the first light-emitting portion 300a is to be formed, as well as the first electrode 500 and the inorganic protective portion 400 corresponding to the first light-emitting portion 300a. That is, the orthographic projection of the photoresist pattern PR on the driving backplane 100 covers the orthographic projection of the pixel opening K1 corresponding to the first light-emitting portion 300a on the driving backplane 100, and covers the orthographic projection of the partition groove K2 corresponding to the pixel opening K1 on the driving backplane 100.

[0171] The schematic diagram of the partial film structure of the display panel after step S602 is as follows: Figure 17 shown.

[0172] Step S603 : performing a first etching process on the first inorganic protective film to form an inorganic protective portion with a photoresist pattern.

[0173] Step S604 : performing a second etching process on the first conductive film to form a first electrode with a photoresist pattern and an inorganic protective portion.

[0174] Step S605 : performing a third etching process on the first light-emitting thin film to form a first light-emitting portion having a photoresist pattern, an inorganic protective portion and a first electrode.

[0175] The schematic diagram of the partial film structure of the display panel after step S605 is as follows: Figure 18 shown.

[0176] Step S606 , stripping the photoresist pattern to form a first light-emitting portion, and a first electrode and an inorganic protective portion corresponding to the first light-emitting portion.

[0177] The schematic diagram of the partial film structure of the display panel after step S606 is as follows: Figure 19 shown.

[0178] Step S700: forming a plurality of second light-emitting portions on a driving backplane on which a plurality of first light-emitting portions are formed, and forming corresponding first electrodes and inorganic protective portions on a side of the second light-emitting portion away from the driving backplane.

[0179] Here, the second light emitting portion 300 b may be the light emitting portion 300 corresponding to the G pixel.

[0180] It should be noted that step S700 may refer to the above-mentioned step S600 and will not be repeated here.

[0181] Step S800: forming a plurality of third light-emitting portions on a driving backplane having a plurality of first light-emitting portions and a plurality of second light-emitting portions, and forming corresponding first electrodes and inorganic protective portions on a side of the third light-emitting portion away from the driving backplane.

[0182] Here, the third light emitting portion 300 c may be the light emitting portion 300 corresponding to the B pixel.

[0183] It should be noted that step S800 may refer to the above-mentioned step S600 and will not be described in detail here.

[0184] The schematic diagram of the partial film structure of the display panel after step S800 is as follows: Figure 20 shown.

[0185] Step S900 : forming an organic encapsulation layer and an inorganic encapsulation layer in sequence on a side of the inorganic protection portion facing away from the driving back plate.

[0186] The schematic diagram of the partial film structure of the display panel after step S900 is as follows: Figure 21 shown.

[0187] Here, the organic encapsulation layer 1100 can be a film layer made of transparent ink material. The organic encapsulation layer 1100 can ensure good flatness of the display panel 000 to ensure good effects of other functional layers (for example, touch electrode layers) subsequently formed on the organic encapsulation layer 1100.

[0188] Inorganic encapsulation layer 1200 covers organic encapsulation layer 1100. Inorganic encapsulation layer 1200 can be a film layer made of an inorganic material, such as silicon nitride or silicon oxide. Inorganic encapsulation layer 1200 has strong water and oxygen barrier properties, preventing water vapor and oxygen from entering organic encapsulation layer 1100, thereby ensuring the yield of display panel 000.

[0189] In summary, an embodiment of the present application provides a method for preparing a display panel, the method comprising: forming a plurality of partition troughs on one side of a driving backplane, forming a plurality of light-emitting portions on the side of the plurality of partition troughs away from the driving backplane, and a first electrode and an inorganic protective portion corresponding to the light-emitting portion. During the etching process, the partition troughs and the inorganic protective portion can prevent water vapor and oxygen from corroding the portion of the light-emitting portion located within the area enclosed by the partition troughs from the side and front, thereby improving the yield of the display panel and ensuring the reliability of the display panel. In this way, the display panel does not require FMM when forming R, G, and B sub-pixels, thereby effectively improving the PPI and aperture ratio of the display panel, so that the display effect of the display panel is better. At the same time, the production cost of the display panel can also be reduced.

[0190] The present application also provides a display device. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or the like. The display device can include a power supply component (not shown) and a display panel 000, wherein the display panel 000 can be the display panel 000 in the above-mentioned embodiment. The power supply component is connected to the display panel 000 to supply power to the display panel 000 so that the display panel 000 can display an image.

[0191] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0192] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0193] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: A driving backplane, a pixel definition layer, a plurality of light-emitting portions, and a plurality of inorganic protection portions; The pixel definition layer is located on one side of the driving backplane, and the pixel definition layer has a plurality of pixel openings and a plurality of partition grooves corresponding to the plurality of pixel openings, and the partition grooves are distributed around the corresponding pixel openings; The plurality of light-emitting portions are separately arranged and are all located on a side of the pixel definition layer away from the driving backplane; the plurality of light-emitting portions correspond to the plurality of pixel openings, a portion of the light-emitting portions is located within the corresponding pixel openings, and another portion is located outside the corresponding pixel openings; and a portion of the light-emitting portion located outside the corresponding pixel openings is isolated by the isolation groove; The multiple inorganic protection parts are arranged separately, and the multiple inorganic protection parts correspond to the multiple light-emitting parts. The inorganic protection parts are located on the side of the corresponding light-emitting parts away from the driving backplane, and the inorganic protection parts cover the part of the light-emitting parts that is located in the area surrounded by the partition groove body.

2. The display panel according to claim 1, wherein: The inorganic protection portion includes: a first inorganic portion and a second inorganic portion; The first inorganic part is located in the area surrounded by the partition groove body; the second inorganic part is located outside the first inorganic part, and the orthographic projection of the second inorganic part on the driving back plate overlaps with the orthographic projection of the partition groove body on the driving back plate; The first inorganic part and the second inorganic part are connected.

3. The display panel according to claim 2, wherein: The light emitting portion includes: a light emitting body portion and a peripheral portion; The light-emitting body portion is located within the area enclosed by the partition groove body, the peripheral portion is distributed around the light-emitting body portion, and at least a portion of the peripheral portion is located within the partition groove body; the peripheral portion is disconnected from the light-emitting body portion near the inner side of the pixel opening; The orthographic projection of the second inorganic part on the driving backplane covers the orthographic projection of the peripheral part on the driving backplane.

4. The display panel according to any one of claims 1 to 3, wherein: The display panel further includes: a plurality of first electrodes that are separately arranged and connected in series; The multiple first electrodes correspond to the multiple light-emitting parts and the multiple inorganic protective parts. The first electrodes are located on the side of the corresponding light-emitting parts away from the driving backplane and on the side of the corresponding inorganic protective parts facing the driving backplane.

5. The display panel according to claim 4, wherein: The driving back plate has a plurality of connected auxiliary electrodes, the plurality of auxiliary electrodes correspond to the plurality of partition slots, the auxiliary electrodes are at least partially located in the corresponding partition slots, and the plurality of auxiliary electrodes are correspondingly connected to the plurality of first electrodes.

6. The display panel according to claim 5, wherein: The first electrode includes: a first electrode body and a bonding electrode, wherein the first electrode body is located in the area surrounded by the partition slot body, the bonding electrode is distributed around the first electrode body, and at least a portion of the bonding electrode is located in the partition slot body and is bonded to the auxiliary electrode located in the partition slot body; Wherein, the first electrode body is connected to the bonding electrode.

7. The display panel according to claim 6, wherein: In the partition groove body, the peripheral portion of the light-emitting portion is in direct contact with the auxiliary electrode; in a direction parallel to the driving backplane and perpendicular to the extension direction of the partition groove body, the side of the auxiliary electrode close to the pixel opening protrudes beyond the side of the peripheral portion close to the pixel opening; In which, the light-emitting body part in the light-emitting part is disconnected between the side of the light-emitting body part away from the pixel opening and the side of the peripheral part in the light-emitting part close to the pixel opening, and the overlapping electrode passes through the disconnected area between the light-emitting body part and the peripheral part, and is overlapped with the auxiliary electrode.

8. The display panel according to claim 7, wherein: The overlapping electrode comprises: an overlapping portion and a transition portion connected to each other; The transition portion is located on a side of the peripheral portion away from the auxiliary electrode and is connected to the first electrode body; The overlapping portion is located in a region separated from the light emitting body portion and the peripheral portion, and overlaps the auxiliary electrode.

9. The display panel according to any one of claims 5 to 8, characterized in that: The display panel further includes: a plurality of separately arranged second electrodes; the plurality of second electrodes correspond to the plurality of pixel openings and to the plurality of light-emitting portions; the orthographic projections of the pixel openings on the driving backplane are located within the orthographic projections of the corresponding second electrodes on the driving backplane, and the second electrodes are located on a side of the corresponding light-emitting portion facing the driving backplane, and the second electrodes are in direct contact with a portion of the corresponding light-emitting portion located within the corresponding pixel opening; The driving backplane includes: a substrate, and a plurality of pixel driving circuits located on one side of the substrate; the plurality of pixel driving circuits are electrically connected to a plurality of second electrodes correspondingly.

10. The display panel according to claim 9, wherein: The auxiliary electrode and the second electrode are provided in the same layer and made of the same material; Alternatively, the pixel driving circuit has a signal output electrode, and the signal output electrode is electrically connected to the second electrode; the auxiliary electrode and the signal output electrode are provided in the same layer and are made of the same material.

11. The display panel according to any one of claims 1-3, 5-8, and 10, characterized in that: The plurality of partition troughs are arranged separately; or, two adjacent partition troughs are arranged in communication.

12. The display panel according to claim 11, wherein: When two adjacent partition grooves are connected, there is a first gap between the two adjacent inorganic protection parts, and / or there is a second gap between the two adjacent light-emitting parts; or, the two second inorganic parts in the two adjacent inorganic protection parts are stacked, and / or, the two outer parts in the two adjacent light-emitting parts are stacked.

13. The display panel according to any one of claims 1-3, 5-9, 10, and 12, characterized in that: The pixel definition layer is a film layer made of an inorganic material. The display panel further comprises: an organic planar layer, the organic planar layer being located on a side of the pixel definition layer facing the driving backplane; The partition groove body includes: a first through groove and a second through groove that are connected to each other, the first through groove penetrates the pixel definition layer, the second through groove penetrates the organic planar layer, the orthographic projection of the first through groove on the driving backplane is located within the orthographic projection of the second through groove on the driving backplane, and the boundary of the orthographic projection of the first through groove on the driving backplane does not overlap with the boundary of the orthographic projection of the second through groove on the driving backplane.

14. A method for preparing a display panel, characterized in that: The method is used to prepare the display panel according to any one of claims 1 to 13; The plurality of light emitting units include: a plurality of first light emitting units, a plurality of second light emitting units, and a plurality of third light emitting units; the method includes: forming a pixel definition layer on one side of the driving backplane; forming the plurality of first light-emitting portions on a side of the pixel definition layer away from the driving backplane, and forming corresponding inorganic protection portions on a side of the first light-emitting portion away from the driving backplane; forming the plurality of second light-emitting portions on the driving backplane on which the plurality of first light-emitting portions are formed, and forming corresponding inorganic protective portions on a side of the second light-emitting portion away from the driving backplane; The plurality of third light emitting portions are formed on a driving backplane on which the plurality of first light emitting portions and the plurality of second light emitting portions are formed, and corresponding inorganic protective portions are formed on a side of the third light emitting portion away from the driving backplane.

15. A display device, characterized in that: include: A power supply component, and a display panel according to any one of claims 1 to 13, wherein the power supply component is used to supply power to the display panel.

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