Display panel, preparation method of display panel, display module and alignment method of display module

Abstract

The invention provides a display panel, a preparation method of the display panel, a display module and an alignment method of the display module. The display panel includes: a substrate; the first isolation structure is located on one side of the substrate and located in the display area, and a plurality of first isolation openings are defined by the first isolation structure; the second isolation structure and the first isolation structure are located on the same side of the substrate, the second isolation structure is located in the alignment identification area, and a plurality of second isolation openings are defined by the second isolation structure; the reflectivity of the first isolation opening is different from the reflectivity of the second isolation opening. When the display panel and the cover plate are aligned, the cover plate and the display panel can be accurately attached, and the alignment precision is high.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display panel and a method for manufacturing the same, a display module and a method for aligning the same. Background Art

[0002] In the process of manufacturing a traditional display panel, the light-emitting pixel patterning is usually achieved through a fine metal mask (FMM). The FMM technology is mature and has rich mass production experience. However, the FMM technology also has problems such as limited precision, high development cost, and long development cycle. The fine metal maskless technology eliminates the limitations of the traditional OLED process on the display screen size, resolution, and other screen performance, and has the advantages of high performance, full-domain size, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, CN118660589A record the relevant content of the fine metal maskless technology for reference.

[0003] However, the current display panel still cannot well meet the requirements. Summary of the Invention

[0004] In view of this, embodiments of the present application provide a display panel and a method for manufacturing the same, a display module and a method for aligning the same.

[0005] In a first aspect of the present application, a display panel is provided. The display panel includes a display area and an alignment mark area, and the alignment mark area is located at at least a part of the periphery of the display area; The display panel includes: A substrate; A first isolation structure, located on one side of the substrate and in the display area, the first isolation structure enclosing a plurality of first isolation openings; A second isolation structure, located on the same side of the substrate as the first isolation structure and in the alignment mark area, the second isolation structure enclosing a plurality of second isolation openings; The reflectivity of the first isolation openings is different from the reflectivity of the second isolation openings.

[0006] In one embodiment, the display panel further includes: a plurality of light-emitting devices, at least some of the light-emitting devices being located in the first isolation openings; A first conductive layer, located between the second isolation structure and the substrate, at least a part of the first conductive layer being exposed in the second isolation openings, and the reflectivity of the first conductive layer being different from the reflectivity of the light-emitting devices; Preferably, the first conductive layer includes a plurality of first sub-conductive layers, the substrate includes a second conductive layer, and adjacent first sub-conductive layers are electrically connected through the second conductive layer; Preferably, the display panel further includes a border area that at least partially surrounds the display area; the first conductive layer and the second conductive layer are located in the border area; Preferably, the substrate further includes an insulating layer located between the first conductive layer and the second conductive layer. The insulating layer includes a through hole, and the first conductive layer extends to the through hole and is electrically connected to the second conductive layer.

[0007] In one embodiment, the first isolation structure and the second isolation structure are disposed on the same layer; Preferably, the first isolation structure includes a stacked first part and second part. The first part is located on the side of the second part away from the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection of the first part on the substrate; The second isolation structure includes a stacked third part and fourth part. The third part is located on the side of the fourth part away from the substrate, and the orthographic projection of the fourth part on the substrate is within the orthographic projection of the third part on the substrate; Preferably, the first isolation structure further includes a fifth part located on the side of the second part close to the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection of the fifth part on the substrate; The second isolation structure further includes a sixth part located on the side of the fourth part close to the substrate, and the orthographic projection of the fourth part on the substrate is within the orthographic projection of the sixth part on the substrate.

[0008] In one embodiment, the display panel further includes a pixel defining layer. In the display area, the pixel defining layer defines a plurality of pixel openings. In the alignment mark area, the pixel defining layer defines a plurality of first redundant pixel openings. The orthographic projection of the pixel opening on the substrate is within the orthographic projection of the first isolation opening on the substrate, and the orthographic projection of the first redundant pixel opening on the substrate is within the orthographic projection of the second isolation opening on the substrate; At least a part of the first conductive layer is exposed to the connected first redundant pixel opening and the second isolation opening.

[0009] In one embodiment, the display panel further includes a border area that at least partially surrounds the display area, and the alignment mark area is located in the border area; Preferably, in the first direction, the alignment mark area is located on at least one side of the display area; in the second direction, the alignment mark area is located on at least one side of the display area; the first direction intersects the second direction; Preferably, the second isolation opening includes a first sub-isolation opening that is adjacent to the edge of the display area and is arranged circumferentially along the edge of the display area; Preferably, the orthographic projection of the first sub-isolation opening on the substrate near the edge of the display area is on the same straight line.

[0010] In one embodiment, the light-emitting device includes a first electrode layer, a first light-emitting functional layer, and a second electrode layer stacked in sequence. The first electrode layer is located between the first isolation structure and the substrate, and at least part of the first electrode layer is exposed to the first isolation opening; the first light-emitting functional layer and the second electrode layer are located in the first isolation opening; The first electrode layer is disposed on the same layer as the first conductive layer.

[0011] In one embodiment, the display panel further includes a non-alignment identification area located on at least part of the peripheral side of the display area; The display panel further includes a third isolation structure located in the non-alignment identification area. The third isolation structure is disposed on the same layer as the first isolation structure; Preferably, the display panel further includes a border area that at least partially surrounds the display area, and the non-alignment identification area is located in the border area; Preferably, the third isolation structure defines a plurality of third isolation openings. The display panel further includes redundant light-emitting devices, at least part of the redundant light-emitting devices are located in the third isolation openings, and at least part of the redundant light-emitting devices overlap with the third isolation structure; Preferably, the redundant light-emitting devices are disposed on the same layer as the light-emitting devices.

[0012] In a second aspect of the present application, a display panel is provided. The display panel includes a display area and an alignment identification area located on at least part of the peripheral side of the display area; The display panel includes: A substrate; A pixel defining layer located on one side of the substrate. In the display area, the pixel defining layer defines a plurality of pixel openings, and in the alignment identification area, the pixel defining layer defines a plurality of first redundant pixel openings; A plurality of light-emitting devices, at least part of which are located in the pixel openings; A first conductive layer located between the pixel defining layer and the substrate. At least part of the first conductive layer is exposed to the first redundant pixel openings, and the reflectivity of the first conductive layer is different from the reflectivity of the light-emitting devices.

[0013] In one embodiment, the first conductive layer includes a plurality of first sub-conductive layers, and the substrate includes a second conductive layer. Adjacent first sub-conductive layers are electrically connected through the second conductive layer; Preferably, the substrate further includes an insulating layer located between the first conductive layer and the second conductive layer. The insulating layer includes a through hole, and the first conductive layer extends to the through hole and is electrically connected to the second conductive layer.

[0014] In one embodiment, a first isolation structure and a second isolation structure are further included and are located on the side of the pixel defining layer away from the substrate. The first isolation structure defines a plurality of first isolation openings, and the second isolation structure defines a plurality of second isolation openings; The orthographic projection of the pixel opening on the substrate is within the orthographic projection range of the first isolation opening on the substrate, and the orthographic projection of the first redundant pixel opening on the substrate is within the orthographic projection range of the second isolation opening on the substrate; At least a part of the first conductive layer is exposed to the connected first redundant pixel opening and the second isolation opening; Preferably, the first isolation structure includes a stacked first part and a second part. The first part is located on the side of the second part facing away from the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection range of the first part on the substrate; The second isolation structure includes a stacked third part and a fourth part. The third part is located on the side of the fourth part facing away from the substrate, and the orthographic projection of the fourth part on the substrate is within the orthographic projection range of the third part on the substrate; Preferably, the first isolation structure further includes a fifth part located on the side of the second part close to the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection range of the fifth part on the substrate; The second isolation structure further includes a sixth part located on the side of the fourth part close to the substrate, and the orthographic projection of the fourth part on the substrate is within the orthographic projection range of the sixth part on the substrate.

[0015] The third aspect of the present application provides a method for manufacturing a display panel, including: On one side of the substrate and in the display area, a first electrode layer is prepared, and a first conductive layer is prepared in the alignment mark area; On the side of the first electrode layer facing away from the substrate, a first isolation structure surrounding a plurality of first isolation openings is prepared, and on the side of the first conductive layer facing away from the substrate, a second isolation structure surrounding a plurality of second isolation openings is prepared; at least a part of the first electrode layer is exposed to the first isolation openings, and at least a part of the first conductive layer is exposed to the second isolation openings; In the first isolation openings, a first light-emitting functional layer and a second electrode layer are sequentially prepared to obtain a plurality of light-emitting devices, and the reflectivity of the first conductive layer is different from the reflectivity of the light-emitting devices.

[0016] In one embodiment, the step of preparing a first isolation structure surrounding a plurality of first isolation openings on the side of the first electrode layer facing away from the substrate and a second isolation structure surrounding a plurality of second isolation openings on the side of the first conductive layer facing away from the substrate includes: On the side of the first electrode layer facing away from the substrate, a third isolation material layer, a second isolation material layer, and a first isolation material layer are sequentially prepared in the display area and the border area; The first isolation material layer, the second isolation material layer, and the third isolation material layer are patterned to obtain the first isolation structure and the second isolation structure.

[0017] A fourth aspect of the present application provides a display module, which includes a display area and a border area. The border area is located on at least part of the circumferential side of the display area; the border area includes an alignment mark area. The display module includes: A substrate; A first isolation structure, located on one side of the substrate and within the display area. The first isolation structure encloses a plurality of first isolation openings. A second isolation structure, located on the same side of the substrate as the first isolation structure and within the alignment mark area. The second isolation structure encloses a plurality of second isolation openings. A plurality of light-emitting devices, with at least part of the light-emitting devices located within the first isolation openings. A first conductive layer, located between the second isolation structure and the substrate, with at least part of the first conductive layer exposed in the second isolation openings; the reflectivity of the first conductive layer is different from that of the light-emitting devices. Touch traces, located in the border area. The orthographic projection of the touch traces on the substrate partially overlaps with the orthographic projection of the second isolation structure on the substrate.

[0018] In one embodiment, the second isolation openings include first sub-isolation openings. The first sub-isolation openings are adjacent to the edge of the display area and are arranged circumferentially along the edge of the display area; the orthographic projection of the touch traces on the substrate is spaced apart from the orthographic projection of some of the first sub-isolation openings on the substrate. It further includes: a cover plate, located on the side of the touch traces away from the substrate. The orthographic projection of the cover plate on the substrate covers the orthographic projections of the display area and the border area on the substrate. Preferably, the cover plate includes an ink area and a transparent area. The ink area is correspondingly arranged with the border area, and the transparent area is correspondingly arranged with the display area.

[0019] A fifth aspect of the present application provides an alignment method for a display module, including: Obtaining a first image of a first surface flush with the surface of the first conductive layer away from the substrate, and obtaining a second image of the cover plate; on the first surface, the reflectivity of the first conductive layer is different from that of the first electrode layer. Determining the boundary of the display area or the border area based on the first image, and determining the boundary of the ink area based on the second image. Aligning the cover plate with the display panel based on the boundary of the display area or the border area and the boundary of the ink area.

[0020] In one embodiment, the second isolation openings include first sub-isolation openings. The first sub-isolation openings are adjacent to the edge of the display area and are arranged circumferentially along the edge of the display area. The step of determining the boundary of the display area or the border area based on the first image includes: Determining the edge of the first sub-isolation opening close to the display area based on the first image. In a first direction, the edges on the same side of the display area are fitted to a first straight line; in a second direction, the edges on the same side of the display area are fitted to a second straight line; the first direction intersects the second direction. Determine the boundary of the display area or the border area based on the first straight line and the second straight line.

[0021] According to the display panel provided by the embodiments of the present application, the reflectivity of the first conductive layer is different from that of the light-emitting device. When aligning the display panel, the alignment mark area can be clearly recognized. For example, when aligning the display panel with the cover plate, it is beneficial to accurately fit the cover plate and the display panel, and the alignment accuracy is relatively high. Description of the Drawings

[0022] Figure 1 It is a schematic cross-sectional structure diagram of a display panel in an embodiment of the present application.

[0023] Figure 2 It is a schematic top view structure diagram of a display panel in an embodiment of the present application.

[0024] Figure 3 It is a schematic top view structure diagram of a display panel in another embodiment of the present application.

[0025] Figure 4 It is a schematic top view structure diagram of a display panel in another embodiment of the present application.

[0026] Figure 5 It is a schematic cross-sectional structure diagram of a display panel in the prior art.

[0027] Figure 6 It is a schematic cross-sectional structure diagram of a display panel in another embodiment of the present application.

[0028] Figure 7 It is a schematic cross-sectional structure diagram of a display panel in another embodiment of the present application.

[0029] Figure 8 It is a schematic top view structure diagram of a display panel in another embodiment of the present application.

[0030] Figure 9 It is a schematic cross-sectional structure diagram of a display panel in another embodiment of the present application.

[0031] Figure 10 It is a schematic flowchart of a method for manufacturing a display panel in an embodiment of the present application.

[0032] Figure 11 It is a schematic flowchart of the preparation of the first functional material layer and the first electrode material layer in an embodiment of the present application.

[0033] Figure 12Schematic cross-sectional structure diagram of a display module in an embodiment of the present application.

[0034] Figure 13 Schematic top view structure diagram of a display module in an embodiment of the present application.

[0035] Figure 14 Schematic top view structure diagram of a display module in another embodiment of the present application.

[0036] Figure 15 Schematic cross-sectional structure diagram of a display module in another embodiment of the present application.

[0037] Figure 16 Schematic flow chart of the alignment method of the display module in an embodiment of the present application.

[0038] Figure 17 Schematic structure diagram of the first image in an embodiment of the present application. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] In addition, for better illustration of the present application, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present application can be implemented without some specific details. In some instances, methods and means well known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0043] In the first aspect of the present application, a display panel is provided. Referring to Figure 1 the schematic cross-sectional structure diagram of the display panel shown, the display panel includes a display area AA and an alignment mark area S1, and the alignment mark area S1 is located on at least part of the peripheral side of the display area AA.

[0044] Optionally, the display panel further includes a border area NA that at least partially surrounds the display area AA, and the alignment mark area S1 is located in the border area NA. Thus, the setting of the alignment mark area S1 hardly affects the display effect of the display panel.

[0045] Optionally, referring to Figures 2 to 4 the top view structural schematic diagram of the display panel shown, in the first direction x, the alignment mark area S1 is located on at least one side of the display area AA; in the second direction y, the alignment mark area S1 is located on at least one side of the display area AA; the first direction x intersects with the second direction y.

[0046] For example, referring to Figure 2 , in the first direction x, the alignment mark area S1 is located on one side of the display area AA; for example, referring to Figure 3 , in the second direction y, the alignment mark area S1 is located on one side of the display area AA; for another example, referring to Figure 4 , in the first direction x, the alignment mark area S1 is located on both sides of the display area AA; in the second direction y, the alignment mark area S1 is located on both sides of the display area AA. It can be understood that as long as there is the alignment mark area S1, accurate identification of the display panel can be realized, which is beneficial to realizing accurate alignment between the display panel and the remaining film layers, for example, facilitating accurate alignment between the display panel and the cover plate. It can be understood that the larger the area occupied by the alignment mark area S1 in the border area NA, the more accurate the alignment.

[0047] For example, the alignment mark area S1 coincides with the border area NA, and the orthographic projection of the second isolation structure 300 on the substrate 100 coincides with the orthographic projection of the alignment mark area S1 on the substrate 100.

[0048] Optionally, the display panel includes: a substrate 100, a first isolation structure 200, a second isolation structure 300, a plurality of light-emitting devices 400, and a first conductive layer 510.

[0049] Optionally, the first isolation structure 200 is located on one side of the substrate 100 and in the display area AA, and the first isolation structure 200 encloses a plurality of first isolation openings 210; at least part of the light-emitting devices 400 are located in the first isolation openings 210.

[0050] Optionally, the second isolation structure 300 and the first isolation structure 200 are located on the same side of the substrate 100 and in the alignment mark area S1, and the second isolation structure 300 encloses a plurality of second isolation openings 310.

[0051] Optionally, the reflectivity of the first isolation opening 210 is different from that of the second isolation opening 310. It can be understood that the different reflectivities of the first isolation opening 210 and the second isolation opening 310 mean that after the same light is irradiated into the first isolation opening 210 and the second isolation opening 310, the reflectivities of the light reflected by the first isolation opening 210 and the second isolation opening 310 are different. For example, the first isolation opening 210 and the second isolation opening 310 have different film layer structures, and the film layer structures in the first isolation opening 210 and the second isolation opening 310 have different reflectivities for light.

[0052] In one embodiment, the light-emitting device 400 includes a first electrode layer 410, a first light-emitting functional layer 420, and a second electrode layer 430 stacked in sequence. The first electrode layer 410 is located between the first isolation structure 200 and the substrate 100, and at least a part of the first electrode layer 410 is exposed to the first isolation opening 210; the light-emitting functional layer 420 and the second electrode layer 430 are located in the first isolation opening 210.

[0053] For example, the first electrode layer 410 may be an anode, and the second electrode layer 430 may be a cathode. The first light-emitting functional layer 420 includes a light-emitting layer (Emitting Layer, EML), and may further include at least one of a hole injection layer (Hole Inject Layer, HIL), a hole transport layer (Hole Transport Layer, HTL), and an electron blocking layer (Electron-Blocking Layer, EBL) located between the anode and the light-emitting layer (EML), and at least one of an electron injection layer (Electron Inject Layer, EIL), an electron transport layer (Electron Transport Layer, ETL), and a hole blocking layer (Hole-Blocking Layer, HBL) located between the cathode and the light-emitting layer (EML).

[0054] Optionally, a first conductive layer 510 is located between the second isolation structure 300 and the substrate 100, at least a part of the first conductive layer 510 is exposed to the second isolation opening 310, and the reflectivity of the first conductive layer 510 is different from that of the light-emitting device 400. According to the display panel provided by the embodiments of the present application, since the reflectivity of the first conductive layer 510 is different from that of the light-emitting device 400, when aligning the display panel, the alignment mark area S1 can be clearly identified. For example, when aligning the display panel with the cover plate, it is beneficial to accurately fit the cover plate and the display panel, and the alignment accuracy is relatively high.

[0055] The inventors of the present application found that in the display panels of the prior art, referring to Figure 5Schematic cross-sectional structure diagram of the display panel shown. In both the display area AA and the border area NA, a first isolation structure 200 is included, such that the isolation structures and the distribution of the isolation openings in the display area AA and the border area NA are the same. Although the above structure is beneficial to improving the etching uniformity of the first isolation opening 210 and beneficial to improving the yield of the display panel. However, the problem in the prior art is that due to the consistency of the first isolation structure 200 in the display area AA and the border area NA, when aligning the display panel, it is impossible to accurately obtain the edge of the display area AA or the edge of the border area NA close to the display area AA, resulting in only being able to align the cover plate with the outer shape of the display panel during alignment. There are problems with the cutting accuracy of the display panel or the cover plate, resulting in a lower bonding accuracy, and thus a lower yield of the obtained display module.

[0056] In view of the above problems, the inventors of the present application set a alignment mark area S1 in the border area NA, and no other film layers are provided in the second isolation opening 310 in the alignment mark area S1, and the first conductive layer 510 is directly exposed in the second isolation opening 310. The reflectivity of the first conductive layer 510 is different from the reflectivity of the light-emitting device 400. When aligning the display panel and the cover plate, the position of the alignment mark area S1 can be accurately obtained, and then the edge position of the display area AA can be obtained, realizing the accurate alignment of the display panel and the cover plate.

[0057] For example, the first electrode layer 410 and the first conductive layer 510 are provided on the same layer. Another example is that the first electrode layer 410 and the first conductive layer 510 are made of the same material. Since there are also a first light-emitting functional layer 420 and a second electrode layer 430 on the side of the first electrode layer 410 facing away from the substrate 100, the reflectivity of the first conductive layer 510 is greater than the reflectivity of the light-emitting device 400.

[0058] In one embodiment, the second isolation structure 300 and the first isolation structure 200 are provided on the same layer. Thus, it is convenient to prepare the second isolation structure 300 and the first isolation structure 200 by using the same manufacturing process.

[0059] Optionally, referring to Figure 1, the first isolation structure 200 includes a stacked first part 201 and a second part 202. The first part 201 is located on the side of the second part 202 away from the substrate 100, and the orthographic projection of the second part 202 on the substrate 100 is within the orthographic projection of the first part 201 on the substrate 100. Exemplarily, the second part 202 can be designed as an independent film layer, that is, there is no physical interface inside the second part 202, and each part is made of the same material. For example, the material of the second part 202 is aluminum. Alternatively, the second part 202 can be designed to be composed of at least two stacked film layers. For example, the second part 202 is formed by stacking two conductive film layers. The materials of the two conductive film layers can be molybdenum and aluminum respectively, and the conductive film layer made of molybdenum is located between the substrate 100 and the conductive film layer made of aluminum. Exemplarily, the second part 202 includes a conductive sub-part, or the second part 202 itself is a conductive structure. The second part 202 is overlapped with the first electrode layer 410 of the light-emitting device 400 to electrically connect the first electrode layers 410 of adjacent light-emitting devices 400 to achieve a full-surface cathode. The material of the first part 201 can be an organic material, an inorganic material, or a metal material. In the case where the first part 201 is a metal material, the material of the first part 201 can be titanium.

[0060] Optionally, referring to Figure 7 , the second isolation structure 300 includes a stacked third part 301 and a fourth part 302. The third part 301 is located on the side of the fourth part 302 away from the substrate 100, and the orthographic projection of the fourth part 302 on the substrate 100 is within the orthographic projection of the third part 301 on the substrate 100.

[0061] For example, the first part 201 and the third part 301 are arranged on the same layer, and the second part 202 and the fourth part 302 are arranged on the same layer.

[0062] Optionally, the first isolation structure 200 further includes a fifth part 203, which is located on the side of the second part 202 close to the substrate 100, and the orthographic projection of the second part 202 on the substrate 100 is within the orthographic projection of the fifth part 203 on the substrate 100.

[0063] Optionally, the second isolation structure 300 further includes a sixth part 303, which is located on the side of the fourth part 302 close to the substrate 100, and the orthographic projection of the fourth part 302 on the substrate 100 is within the orthographic projection of the sixth part 303 on the substrate 100. For example, the fifth part 203 and the sixth part 303 are arranged on the same layer.

[0064] In one embodiment, referring to Figure 6In the schematic diagram of the cross-sectional structure of the display panel shown, the first conductive layer 510 includes a plurality of first sub-conductive layers 511, the substrate 100 includes a second conductive layer 110, and adjacent first sub-conductive layers 511 are electrically connected through the second conductive layer 110. Thus, it is beneficial to connect the first sub-conductive layers 511 arranged at intervals as a whole, and can be used as a shielding layer to avoid interference between the gate drive signal line (GiP signal line) and the touch control trace (TP trace line) in the panel in the substrate 100.

[0065] It can be understood that the gate driving signal line (GiP signal line) in the panel is located on a side of the second conductive layer 110 away from the first sub-conductive layer 511 .

[0066] Optionally, the display panel further includes a frame area NA, which at least partially surrounds the display area AA; the first conductive layer 510 and the second conductive layer 110 are located in the frame area NA.

[0067] For example, the display panel includes a non-display area, the non-display area surrounds the display area AA, and the frame area NA is located in the non-display area.

[0068] Optionally, refer to Figure 6 The substrate 100 further includes an insulating layer 120 located between the first conductive layer 510 and the second conductive layer 110 . The insulating layer 120 includes a through hole 121 . The first conductive layer 510 extends to the through hole 121 and is electrically connected to the second conductive layer 110 .

[0069] In a specific embodiment, the first sub-conductive layer 511 is a mesh structure, and the second conductive layer 110 is also a mesh structure, and the first sub-conductive layer 511 and the second conductive layer 110 are electrically connected by a wire.

[0070] In one embodiment, referring to Figure 1 The display panel further includes a pixel defining layer 1000. In the display area AA, the pixel defining layer 1000 encloses a plurality of pixel openings 1100. In the alignment mark area S1, the pixel defining layer 1000 encloses a plurality of first redundant pixel openings 1200. The orthographic projections of the pixel openings 1100 on the substrate 100 are located within the orthographic projection range of the first isolation opening 210 on the substrate 100. The orthographic projections of the first redundant pixel openings 1200 on the substrate 100 are located within the orthographic projection range of the second isolation opening 310 on the substrate 100. The first conductive layer 510 is at least partially exposed to the connected first redundant pixel opening 1200 and the second isolation opening 310. Therefore, the first conductive layer 510 exposed in the connected first redundant pixel opening 1200 and the second isolation opening 310 has a different reflectivity from the light emitting device 400.

[0071] For example, the first electrode layer 410 is exposed to the connected pixel opening 1100 and the first isolation opening 210 .

[0072] Optionally, referring to Figure 4 , the second isolation opening 310 includes a first sub-isolation opening 311, the first sub-isolation opening 311 is adjacent to the edge of the display area AA, and is arranged circumferentially along the edge of the display area AA. For example, the orthographic projection of the first sub-isolation opening 311 on the substrate 100 near the edge of the display area AA is located on the same straight line. For example, in the first direction x, the orthographic projection of the first sub-isolation openings 311 on the same side of the display area AA on the substrate 100 near the edge of the display area AA is located on the same straight line L1; in the second direction y, the orthographic projection of the first sub-isolation openings 311 on the same side of the display area AA on the substrate 100 near the edge of the display area AA is located on the same straight line L2.

[0073] In one embodiment, referring to Figure 7 the cross-sectional structure schematic diagram of the display panel shown in Figure 8 and the top view structure schematic diagram of the display panel shown in

[0074] the display panel further includes a non-alignment identification area S2, and the non-alignment identification area S2 is located on at least part of the circumferential side of the display area AA. For example, in the border area NA, the area outside the alignment identification area S1 can all be the non-alignment identification area S2.

[0075] Optionally, the non-alignment identification area S2 is located in the border area NA.

[0076] Optionally, the display panel further includes a third isolation structure 600, which is located in the non-alignment identification area S2, and the third isolation structure 600 is provided on the same layer as the first isolation structure 200.

[0077] For example, the third isolation structure 600 and the first isolation structure 200 are prepared by the same manufacturing process.

[0078] Optionally, the redundant light-emitting device 700 is disposed on the same layer as the light-emitting device 400. Exemplarily, the third light-emitting functional layer 720 is disposed on the same layer as the first light-emitting functional layer 420, the third conductive layer 710 is disposed on the same layer as the first electrode layer 410, and the fourth conductive layer 730 is disposed on the same layer as the second electrode layer 430. The third isolation structure 600 and the redundant light-emitting device 700 can be prepared using the same manufacturing process.

[0079] Optionally, the second isolation structure 300 is electrically connected to the third isolation structure 600. For example, adjacent second isolation structures 300 and third isolation structures 600 are overlapped through the fourth conductive layer 730.

[0080] Exemplarily, the isolation structure between adjacent second isolation openings 310 and third isolation openings 610 is the second isolation structure 300 or the third isolation structure 600.

[0081] Exemplarily, the substrate 100 can be a substrate substrate. In some embodiments, the substrate substrate can be a glass-based substrate. In some embodiments, the substrate substrate can include an organic resin material such as epoxy resin, triazine, silicone resin, or polyimide. For example, the substrate substrate can be a FR4 type printed circuit board (PCB), or can be a flexible PCB that is easily deformable. In some embodiments, the substrate substrate can include a ceramic material such as silicon nitride, aluminum nitride, or aluminum oxide, or include a metal or metal compound. For example, the substrate substrate can be a metal core printed circuit board (Metal Core PCB, MCPCB) or a metal copper clad laminate (Metal Copper Clad Laminate, MCCL).

[0082] For example, the substrate 100 includes gate drive signal lines (GiP signal lines). In the border area NA, the GiP signal lines are prone to interference with the touch traces; in the border area NA of an embodiment of the present application, the first conductive layer 510 and the second conductive layer 110 are overlapped, and the third isolation structure 600 and the redundant light-emitting device 700 are overlapped, forming a conductive layer throughout the border area, which helps to avoid interference between the GiP signal lines and the touch traces.

[0083] It should be noted that in this article, the film layers disposed on the same layer can be prepared through the same process, or the film layers disposed on the same layer can be prepared through the same manufacturing process and using the same materials.

[0084] It should be noted that Figures 1 to 10 in Figure 1 、 Figure 6 can be Figure 4 the cross-sectional structure schematic diagram along the AA' direction in Figure 7 can beFigure 8 Schematic cross-sectional structure diagram along the BB' direction

[0085] The second aspect of the present application provides a display panel. Referring to Figure 9 the schematic cross-sectional structure diagram of the display panel shown, the display panel includes a display area AA and an alignment mark area S1, and the alignment mark area S1 is located on at least a part of the peripheral side of the display area AA

[0086] Optionally, the display panel further includes a border area NA. The border area NA at least partially surrounds the display area AA, and the alignment mark area S1 is located in the border area NA. Thus, the setting of the alignment mark area S1 hardly affects the display effect of the display panel

[0087] Optionally, the display panel includes: a substrate 100, a pixel defining layer 1000, a plurality of light-emitting devices 400, and a first conductive layer 510

[0088] Optionally, the pixel defining layer 1000 is located on one side of the substrate 100. In the display area AA, the pixel defining layer 1000 defines a plurality of pixel openings 1100, and in the alignment mark area S1, the pixel defining layer 1000 defines a plurality of first redundant pixel openings 1200. At least a part of the light-emitting devices 400 are located in the pixel openings 1100

[0089] Optionally, the first conductive layer 510 is located between the pixel defining layer 1000 and the substrate 100, and at least a part of the first conductive layer 510 is exposed in the first redundant pixel openings 1200. The reflectivity of the first conductive layer 510 is different from the reflectivity of the light-emitting devices 400

[0090] In one embodiment, the first conductive layer 510 includes a plurality of first sub-conductive layers 511, the substrate 100 includes a second conductive layer 110, and the adjacent first sub-conductive layers 511 are electrically connected through the second conductive layer 110. Thus, it is beneficial to connect the spaced-apart first sub-conductive layers 511 into a whole, which can be used as a shielding layer to avoid interference between the in-panel gate driving signal lines (GiP signal lines) and the touch traces (TP trace lines) in the substrate 100

[0091] Optionally, referring to Figure 6 , the substrate 100 further includes an insulating layer 120, which is located between the first conductive layer 510 and the second conductive layer 110. The insulating layer 120 includes a through hole 121, and the first conductive layer 510 extends to the through hole 121 and is electrically connected to the second conductive layer 110

[0092] In a specific embodiment, the first sub-conductive layer 511 is a mesh structure, and the second conductive layer 110 is also a mesh structure. It is only necessary to electrically connect the first sub-conductive layer 511 and the second conductive layer 110 with a wire

[0093] In one embodiment, referring to Figure 1 , the display panel further includes a first isolation structure 200 and a second isolation structure 300, which are located on a side of the pixel defining layer 1000 away from the substrate 100. The first isolation structure 200 defines a plurality of first isolation openings 210; the second isolation structure 300 defines a plurality of second isolation openings 310; the orthographic projection of the pixel opening 1100 on the substrate 100 is within the orthographic projection range of the first isolation openings 210 on the substrate 100, and the orthographic projection of the first redundant pixel opening 1200 on the substrate 100 is within the orthographic projection range of the second isolation openings 310 on the substrate 100; at least a part of the first conductive layer 510 is exposed to the connected first redundant pixel opening 1200 and second isolation opening 310.

[0094] Optionally, referring to Figure 1 , the first isolation structure 200 includes a stacked first part 201 and second part 202. The first part 201 is located on a side of the second part 202 away from the substrate 100, and the orthographic projection of the second part 202 on the substrate 100 is within the orthographic projection range of the first part 201 on the substrate 100. Exemplarily, the second part 202 can be designed as an independent film layer, that is, there is no physical interface inside the second part 202, and each part is made of the same material. For example, the material of the second part 202 is aluminum. Alternatively, the second part 202 can be designed to be composed of at least two stacked film layers. For example, the second part 202 is formed by stacking two conductive film layers. The materials of the two conductive film layers can be molybdenum and aluminum respectively, and the conductive film layer made of molybdenum is located between the substrate 100 and the conductive film layer made of aluminum. Exemplarily, the second part 202 includes an electron-conducting part, or the second part 202 itself is a conductive structure. The second part 202 is lapped with the first electrode layer 410 of the light-emitting device 400 to electrically connect the first electrode layers 410 of adjacent light-emitting devices 400, thereby realizing a whole-surface cathode. The material of the first part 201 can be an organic material, an inorganic material, or a metal material. When the first part 201 is a metal material, the material of the first part 201 can be titanium.

[0095] Optionally, the second isolation structure 300 includes a stacked third part 301 and fourth part 302. The third part 301 is located on a side of the fourth part 302 away from the substrate 100, and the orthographic projection of the fourth part 302 on the substrate 100 is within the orthographic projection range of the third part 301 on the substrate 100.

[0096] For example, the first part 201 and the third part 301 are arranged in the same layer, and the second part 202 and the fourth part 302 are arranged in the same layer.

[0097] Optionally, the first isolation structure 200 further includes a fifth portion 203 located on the side of the second portion 202 close to the substrate 100, and the orthographic projection of the second portion 202 on the substrate 100 is within the orthographic projection range of the fifth portion 203 on the substrate 100.

[0098] Optionally, the second isolation structure 300 further includes a sixth portion 303 located on the side of the fourth portion 302 close to the substrate 100, and the orthographic projection of the fourth portion 302 on the substrate 100 is within the orthographic projection range of the sixth portion 303 on the substrate 100. For example, the fifth portion 203 and the sixth portion 303 are arranged on the same layer.

[0099] It should be noted that the display panel of this embodiment can be integrally or partially combined with the display panel described above, and details will not be elaborated here.

[0100] The third aspect of the present application provides a method for manufacturing a display panel. Referring to Figure 10 the schematic flowchart of the method for manufacturing the display panel shown, the method for manufacturing the display panel includes the following steps.

[0101] S100: On one side of the substrate and within the display area, a first electrode layer is formed, and a first conductive layer is formed within the alignment mark area.

[0102] It should be noted that the first electrode layer, the display area, the first conductive layer, the alignment mark area, and the substrate are the same as those described above, and details will not be elaborated here.

[0103] S200: On the side of the first electrode layer facing away from the substrate, a first isolation structure surrounding a plurality of first isolation openings is formed, and on the side of the first conductive layer facing away from the substrate, a second isolation structure surrounding a plurality of second isolation openings is formed; at least a part of the first electrode layer is exposed in the first isolation openings, and at least a part of the first conductive layer is exposed in the second isolation openings.

[0104] It should be noted that the first isolation structure and the second isolation structure are the same as those described above, and details will not be elaborated here.

[0105] In one embodiment, the step of forming a first isolation structure surrounding a plurality of first isolation openings on the side of the first electrode layer facing away from the substrate and forming a second isolation structure surrounding a plurality of second isolation openings on the side of the first conductive layer facing away from the substrate includes: on the side of the first electrode layer facing away from the substrate, a third isolation material layer, a second isolation material layer, and a first isolation material layer are sequentially formed within the display area and the border area; the first isolation material layer, the second isolation material layer, and the third isolation material layer are patterned to obtain the first isolation structure and the second isolation structure.

[0106] S300: A first light-emitting functional layer and a second electrode layer are sequentially formed within the first isolation openings to obtain a plurality of light-emitting devices.

[0107] Among them, the reflectivity of the first conductive layer is different from that of the light-emitting device.

[0108] For example, the steps of sequentially preparing the first light-emitting functional layer and the second electrode layer in the first isolation opening include: sequentially preparing the first light-emitting functional material layer 42 and the second electrode material layer 43 in the first isolation opening 210 and the second isolation opening 310. For details, refer to Figure 11 ; removing the first light-emitting functional material layer 42 and the second electrode material layer 43 in the second isolation opening 310 to expose the first conductive layer 510. For details, refer to Figure 1 .

[0109] It should be noted that the light-emitting device is the same as that described above, and will not be elaborated here.

[0110] Exemplarily, while manufacturing the light-emitting device, a redundant light-emitting device is manufactured in the third isolation opening.

[0111] It should be noted that the display panel manufactured by the manufacturing method of this embodiment can be integrally or partially combined with the display panel described above, and will not be elaborated here.

[0112] The fourth aspect of the present application provides a display module. Refer to Figure 12 As shown in the cross-sectional structural schematic diagram of the display module, the display module includes a display area AA and a border area NA. The border area NA is located on at least part of the periphery of the display area AA; the border area NA includes an alignment mark area S1.

[0113] Optionally, the display module includes: a substrate 100, a first isolation structure 200, a second isolation structure 300, a plurality of light-emitting devices 400, a first conductive layer 510, and a touch trace 800.

[0114] Optionally, the first isolation structure 200 is located on one side of the substrate 100 and in the display area AA. The first isolation structure 200 defines a plurality of first isolation openings 210; at least part of the light-emitting devices 400 are located in the first isolation openings 210.

[0115] Optionally, the second isolation structure 300 is on the same side of the substrate 100 as the first isolation structure 200 and in the alignment mark area S1. The second isolation structure 300 defines a plurality of second isolation openings 310.

[0116] Optionally, the first conductive layer 510 is located between the second isolation structure 300 and the substrate 100. At least part of the first conductive layer 510 is exposed in the second isolation openings 310. The reflectivity of the first conductive layer 510 is different from that of the light-emitting device 400.

[0117] Optionally, the touch trace 800 is located in the border area NA, and the orthographic projection of the touch trace 800 on the substrate 100 partially overlaps with the orthographic projection of the second isolation structure 300 on the substrate 100 (specifically refer to Figure 13 and Figure 14 for the top view structural schematic diagram of the display module shown). Thus, the touch trace 800 has a relatively small shielding effect on the first conductive layer 510, which is beneficial to accurately identify the alignment mark area S1.

[0118] It can be understood that within the area surrounded by the touch trace 800, as long as the length of the exposed edge of the first conductive layer 510 near the display area AA meets the alignment and grasping length, the requirements can be met.

[0119] It can be understood that on the side of the first isolation structure 200 and the second isolation structure 300 away from the substrate, there is a packaging layer 10. The packaging layer 10 includes a first packaging layer 11, a second packaging layer 12, and a third packaging layer 13. The first packaging layer 11 includes a plurality of packaging parts 111. The packaging parts 111 correspond to the first isolation opening 210 and the second isolation opening 310, and part of them are located in the first isolation opening 210 and the second isolation opening 310. It should be noted that the packaging layer 10 can be a packaging layer in the prior art, and will not be elaborated here too much.

[0120] In one embodiment, the second isolation opening 310 includes a first sub-isolation opening 311. The first sub-isolation opening 311 is adjacent to the edge of the display area AA and is arranged circumferentially along the edge of the display area AA; the orthographic projection of the touch trace 800 on the substrate 100 is spaced from the orthographic projection of part of the first sub-isolation opening 311 on the substrate 100.

[0121] Optionally, referring to Figure 15 , the display module further includes: a cover plate 900, located on the side of the touch trace 800 away from the substrate 100. The orthographic projection of the cover plate 900 on the substrate 100 covers the orthographic projections of the display area AA and the border area NA on the substrate 100.

[0122] It can be understood that an optical glue layer 50 can be used to flatten the side of the touch trace 800 away from the substrate 100, which is convenient for the bonding of the cover plate 900.

[0123] Optionally, the cover plate 900 includes an ink area 910 and a transparent area 920. The ink area 910 is correspondingly arranged with the border area NA, and the transparent area 920 is correspondingly arranged with the display area AA. For example, the orthographic projection of the ink area 910 on the substrate 100 coincides with the orthographic projection of the border area NA on the substrate 100, and the orthographic projection of the transparent area 920 on the substrate 100 coincides with the orthographic projection of the display area AA on the substrate 100.

[0124] It can be understood that during alignment, the boundary of the transparent region 920 needs to be aligned with the boundary of the display region AA to achieve high-precision fitting of the cover plate 900 and the display panel.

[0125] It should be noted that the display module in this embodiment can be integrally or partially combined with the display panel described above, and will not be elaborated here.

[0126] It should be noted that Figure 12 and Figure 15 can be Figure 13 the schematic cross-sectional structure diagram along the CC' direction in

[0127] The fifth aspect of the present application provides a method for aligning a display module. Referring to Figure 16 the schematic flowchart of the method for aligning the display module shown, the method for aligning the display module includes the following steps.

[0128] S400: Obtain a first image of the first surface that is flush with the surface of the first conductive layer facing away from the substrate, and obtain a second image of the cover plate.

[0129] Among them, on the first surface, the reflectivity of the first conductive layer is different from that of the first electrode layer. In the first image, the pattern corresponding to the first conductive layer is brighter, and the pattern corresponding to the first electrode layer is darker.

[0130] S500: Determine the boundary of the display region or the border region based on the first image, and determine the boundary of the ink region based on the second image.

[0131] In one embodiment, the second isolation opening 310 includes a first sub-isolation opening 311. The first sub-isolation opening 311 is adjacent to the edge of the display region AA and is arranged circumferentially along the edge of the display region AA; the step of determining the boundary of the display region or the border region based on the first image (the schematic diagram of the first image can refer to Figure 17 ) includes: determining the edge of the first sub-isolation opening 311 close to the display region AA based on the first image; fitting the edges on the same side of the display region AA into a first straight line L1 in the first direction x; fitting the edges on the same side of the display region AA into a second straight line L2 in the second direction y; the first direction x intersects with the second direction y; determine the boundary of the display region AA or the border region NA based on the first straight line L1 and the second straight line L2.

[0132] It can be understood that when manufacturing the second isolation opening 310, there is a preset distance between the edge of the first sub-isolation opening 311 close to the display region AA and the boundary of the display region AA. After identifying the first straight line L1 and the second straight line L2, perform an operation on the positions of the first straight line L1 and the second straight line L2 with the preset distance, and the boundary position of the display region AA can be obtained.

[0133] Similarly, the reflectivity of the ink area and the transparent area of the cover plate is different, and the boundary of the ink area of the cover plate can be obtained by conventional means. It should be noted that the boundary of the ink area of the cover plate here refers to the boundary of the ink area close to the transparent area.

[0134] S600: Align the cover plate with the display panel based on the boundaries of the display area or the border area and the boundary of the ink area.

[0135] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purposes of illustration and easy understanding, rather than limitations. The above details do not limit the present application to necessarily adopt the above specific details to implement.

[0136] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A display panel, characterized in that, The display panel comprises a display area and an alignment mark area, wherein the alignment mark area is located at least partially around the display area; The display panel comprises: substrate; A first isolation structure is located at one side of the substrate and in the display area, and the first isolation structure encloses a plurality of first isolation openings; A second isolation structure is located on the same side of the substrate as the first isolation structure and is located in the alignment mark area, and the second isolation structure is surrounded by a plurality of second isolation openings; A reflectivity of the first isolation opening is different from a reflectivity of the second isolation opening.

2. The display panel according to claim 1, wherein Also includes: a plurality of light emitting devices, at least some of which are located in the first isolation opening; a first conductive layer, located between the second isolation structure and the substrate, at least a portion of the first conductive layer is exposed to the second isolation opening, and a reflectivity of the first conductive layer is different from a reflectivity of the light emitting device; Preferably, the first conductive layer includes a plurality of first sub-conductive layers, the substrate includes a second conductive layer, and adjacent first sub-conductive layers are electrically connected via the second conductive layer; Preferably, the display panel further comprises a frame area, wherein the frame area at least partially surrounds the display area; the first conductive layer and the second conductive layer are located in the frame area; Preferably, the substrate further includes an insulating layer located between the first conductive layer and the second conductive layer, the insulating layer includes a through hole, and the first conductive layer extends to the through hole and is electrically connected to the second conductive layer.

3. The display panel according to claim 1, wherein The first isolation structure and the second isolation structure are arranged on the same layer; Preferably, the first isolation structure comprises a first portion and a second portion stacked together, the first portion is located on a side of the second portion away from the substrate, and an orthographic projection of the second portion on the substrate is located within a range of an orthographic projection of the first portion on the substrate; The second isolation structure comprises a third portion and a fourth portion stacked together, the third portion is located on a side of the fourth portion away from the substrate, and an orthographic projection of the fourth portion on the substrate is located within the orthographic projection range of the third portion on the substrate; Preferably, the first isolation structure further includes a fifth portion, which is located on a side of the second portion close to the substrate, and the orthographic projection of the second portion on the substrate is located within the orthographic projection range of the fifth portion on the substrate; The second isolation structure further includes a sixth portion located on a side of the fourth portion close to the substrate, and an orthographic projection of the fourth portion on the substrate is within a range of an orthographic projection of the sixth portion on the substrate.

4. The display panel according to claim 2, wherein, The display panel further comprises a pixel defining layer, wherein in the display area, the pixel defining layer encloses a plurality of pixel openings, and in the alignment mark area, the pixel defining layer encloses a plurality of first redundant pixel openings, wherein the orthographic projections of the pixel openings on the substrate are located within the orthographic projection range of the first isolation openings on the substrate, and the orthographic projections of the first redundant pixel openings on the substrate are located within the orthographic projection range of the second isolation openings on the substrate; The first conductive layer is at least partially exposed to the first redundant pixel opening and the second isolation opening that are in communication with each other.

5. The display panel according to claim 1, characterized in that, The display panel further includes a border area that at least partially surrounds the display area, and the alignment mark area is located in the border area; Preferably, in a first direction, the alignment mark area is located on at least one side of the display area; in a second direction, the alignment mark area is located on at least one side of the display area; the first direction intersects with the second direction; Preferably, the second isolation opening includes a first sub-isolation opening that is adjacent to the edge of the display area and is arranged circumferentially along the edge of the display area; Preferably, the orthographic projection of the first sub-isolation opening on the substrate is located on the same straight line close to the edge of the display area.

6. The display panel according to claim 2, wherein, The light-emitting device includes a first electrode layer, a first light-emitting functional layer, and a second electrode layer that are stacked in sequence. The first electrode layer is located between the first isolation structure and the substrate, and at least part of the first electrode layer is exposed in the first isolation opening; The first light-emitting functional layer and the second electrode layer are located in the first isolation opening; The first electrode layer is arranged on the same layer as the first conductive layer.

7. The display panel according to claim 2, characterized in that, The display panel further includes a non-alignment mark area that is located on at least part of the periphery of the display area; The display panel further includes a third isolation structure that is located in the non-alignment mark area and is arranged on the same layer as the first isolation structure; Preferably, the display panel further includes a border area that at least partially surrounds the display area, and the non-alignment mark area is located in the border area; Preferably, the third isolation structure defines a plurality of third isolation openings, and the display panel further includes redundant light-emitting devices. At least part of the redundant light-emitting devices are located in the third isolation openings, and at least part of the redundant light-emitting devices overlap with the third isolation structure; Preferably, the redundant light-emitting devices are arranged on the same layer as the light-emitting devices.

8. A display panel, characterized in that, The display panel includes a display area and an alignment mark area that is located on at least part of the periphery of the display area; The display panel includes: a substrate; a pixel defining layer located on one side of the substrate. In the display area, the pixel defining layer defines a plurality of pixel openings, and in the alignment mark area, the pixel defining layer defines a plurality of first redundant pixel openings; a plurality of light-emitting devices, at least part of which are located in the pixel openings; a first conductive layer located between the pixel defining layer and the substrate. At least part of the first conductive layer is exposed in the first redundant pixel openings, and the reflectivity of the first conductive layer is different from the reflectivity of the light-emitting devices.

9. The display panel according to claim 8, wherein The first conductive layer includes a plurality of first sub-conductive layers, and the substrate includes a second conductive layer. Adjacent first sub-conductive layers are electrically connected through the second conductive layer; Preferably, the substrate further includes an insulating layer located between the first conductive layer and the second conductive layer. The insulating layer includes through holes, and the first conductive layer extends to the through holes and is electrically connected to the second conductive layer.

10. The display panel according to claim 8, wherein, It further includes a first isolation structure and a second isolation structure, which are located on a side of the pixel defining layer away from the substrate. The first isolation structure encloses a plurality of first isolation openings, and the second isolation structure encloses a plurality of second isolation openings; The orthographic projection of the pixel opening on the substrate is within the orthographic projection range of the first isolation opening on the substrate, and the orthographic projection of the first redundant pixel opening on the substrate is within the orthographic projection range of the second isolation opening on the substrate; At least a part of the first conductive layer is exposed to the connected first redundant pixel opening and the second isolation opening; Preferably, the first isolation structure includes a first part and a second part stacked on each other. The first part is located on a side of the second part away from the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection range of the first part on the substrate; The second isolation structure includes a third part and a fourth part stacked on each other. The third part is located on a side of the fourth part away from the substrate, and the orthographic projection of the fourth part on the substrate is within the orthographic projection range of the third part on the substrate; Preferably, the first isolation structure further includes a fifth part, which is located on a side of the second part close to the substrate, and the orthographic projection of the second part on the substrate is within the orthographic projection range of the fifth part on the substrate; The second isolation structure further includes a sixth part, which is located on a side of the fourth part close to the substrate, and the orthographic projection of the fourth part on the substrate is within the orthographic projection range of the sixth part on the substrate.

11. A method for manufacturing a display panel, characterized in that, Comprising: On one side of the substrate, a first electrode layer is prepared in the display area, and a first conductive layer is prepared in the alignment mark area; On a side of the first electrode layer away from the substrate, a first isolation structure enclosing a plurality of first isolation openings is prepared, and on a side of the first conductive layer away from the substrate, a second isolation structure enclosing a plurality of second isolation openings is prepared; At least a part of the first electrode layer is exposed to the first isolation openings, and at least a part of the first conductive layer is exposed to the second isolation openings; A first light-emitting functional layer and a second electrode layer are sequentially prepared in the first isolation openings to obtain a plurality of light-emitting devices, and the reflectivity of the first conductive layer is different from that of the light-emitting devices.

12. The preparation method according to claim 11, wherein, The step of preparing, on a side of the first electrode layer away from the substrate, a first isolation structure enclosing a plurality of first isolation openings and a second isolation structure enclosing a plurality of second isolation openings on a side of the first conductive layer away from the substrate includes: On a side of the first electrode layer away from the substrate, a third isolation material layer, a second isolation material layer and a first isolation material layer are sequentially prepared in the display area and the border area; The first isolation material layer, the second isolation material layer and the third isolation material layer are patterned to obtain the first isolation structure and the second isolation structure.

13. A display module, characterized in that, The display module includes a display area and a border area. The border area is located on at least a part of the periphery of the display area; the border area includes an alignment mark area; The display module includes: A substrate; A first isolation structure is located at one side of the substrate and in the display area, and the first isolation structure encloses a plurality of first isolation openings; A second isolation structure is located on the same side of the substrate as the first isolation structure and is located in the alignment mark area, and the second isolation structure is surrounded by a plurality of second isolation openings; a plurality of light emitting devices, at least some of which are located in the first isolation opening; a first conductive layer, located between the second isolation structure and the substrate, at least a portion of the first conductive layer being exposed to the second isolation opening; a reflectivity of the first conductive layer being different from a reflectivity of the light emitting device; A touch line is located in the frame area, and an orthographic projection of the touch line on the substrate partially overlaps with an orthographic projection of the second isolation structure on the substrate.

14. The display module according to claim 13, wherein The second isolation opening includes a first sub-isolation opening, the first sub-isolation opening is adjacent to the edge of the display area and is arranged circumferentially along the edge of the display area; the orthographic projection of the touch control trace on the substrate is spaced apart from the orthographic projection of part of the first sub-isolation opening on the substrate; It also includes: a cover plate, located on a side of the touch line away from the substrate, the orthographic projection of the cover plate on the substrate covering the orthographic projections of the display area and the frame area on the substrate; Preferably, the cover plate comprises an ink area and a transparent area, the ink area is arranged corresponding to the frame area, and the transparent area is arranged corresponding to the display area.

15. A method for aligning a display module, characterized in that, include: Acquire a first image of a first surface flush with a surface of the first conductive layer facing away from the substrate, and acquire a second image of the cover plate; On the first surface, the reflectivity of the first conductive layer is different from the reflectivity of the first electrode layer; Determine a boundary of a display area or a frame area based on the first image, and determine a boundary of an ink area based on the second image; The cover plate is aligned with the display panel based on the boundary of the display area or the frame area and the boundary of the ink area.

16. The alignment method according to claim 15, characterized in that, The second isolation openings include first sub-isolation openings, wherein the first sub-isolation openings are adjacent to the edge of the display area and are arranged circumferentially along the edge of the display area; The step of determining the boundary of the display area or the frame area based on the first image comprises: determining, based on the first image, that the first sub-isolation opening is close to an edge of the display area; In a first direction, the edges located on the same side of the display area are fitted as a first straight line; in a second direction, the edges located on the same side of the display area are fitted as a second straight line; the first direction intersects the second direction; A boundary of the display area or the frame area is determined based on the first straight line and the second straight line.

Images