Display module and preparation method thereof

Abstract

The invention provides a display module and a preparation method thereof. The display module comprises 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 second isolation structure is different from that of the first isolation structure; and a plurality of light-emitting devices, wherein at least part of the light-emitting devices are located in the first isolation openings. 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] This application relates to the field of display technologies, and particularly to a display module and a method for manufacturing the same. Background Art

[0002] In the process of manufacturing traditional display panels, 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 panels still cannot well meet the requirements. Summary of the Invention

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

[0005] In a first aspect of this application, a display module is provided. The display module includes a display area and an alignment mark area, and the alignment mark area is located on at least part of the periphery of the display area; The display module includes: A substrate; A first isolation structure, located on 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, located on the same side of the substrate as the first isolation structure and in the alignment mark area, and the second isolation structure encloses a plurality of second isolation openings. The reflectivity of the second isolation structure is different from that of the first isolation structure; A plurality of light-emitting devices, and at least part of the light-emitting devices are located in the first isolation openings.

[0006] In one embodiment, the reflectivity of the second isolation structure is greater than that of the first isolation structure; Preferably, the ratio of the reflectivity of the second isolation structure to that of the first isolation structure is 2 to 10; Preferably, the reflectivity of the second isolation structure is greater than or equal to 50% and less than or equal to 100%; the reflectivity of the first isolation structure is greater than or equal to 10% and less than or equal to 40%; Preferably, the thickness of the first isolation structure is different from the thickness of the second isolation structure.

[0007] In one embodiment, 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 overlaps with the orthographic projection of the third part on the substrate; the reflectivity of the third part is different from the reflectivity of the first part; Preferably, the reflectivity of the third part is greater than the reflectivity of the first part; Preferably, the first part and the third part are arranged on the same layer, and the second part and the fourth part are arranged on the same layer.

[0008] In one embodiment, the first isolation structure further includes a fifth part, which is 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; Preferably, the material of the third part is the same as the material of the second part, and / or the material of the fourth part is the same as the material of the fifth part; Preferably, the material of the third part includes aluminum, and the material of the first part includes titanium; Preferably, the third part and the second part are arranged on the same layer, and the fourth part and the fifth part are arranged on the same layer.

[0009] In one embodiment, the second isolation structure further includes a sixth part, which is 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, 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 part and the third part are arranged on the same layer, the second part and the fourth part are arranged on the same layer, and the fifth part and the sixth part are arranged on the same layer.

[0010] In one embodiment, 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 seventh part, third part and fourth part, the third part is located on the side of the fourth part away from the substrate, the orthographic projection of the fourth part on the substrate overlaps with the orthographic projection of the third part on the substrate, the orthographic projection of the seventh part on the substrate overlaps with the orthographic projection of the third part on the substrate, the first part and the third part are arranged on the same layer, and the second part and the fourth part are arranged on the same layer; The reflectivity of the seventh part is different from the reflectivity of the first part; Preferably, the reflectivity of the seventh part is greater than the reflectivity of the first part.

[0011] In one embodiment, the display module 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 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 located on the same straight line.

[0012] In one embodiment, the display module further includes a first redundant light-emitting device, and at least part of the first redundant light-emitting device is located in the second isolation opening; Preferably, the first redundant light-emitting device is arranged on the same layer as the light-emitting device; Preferably, 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 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 redundant light-emitting device includes a first conductive layer, a second light-emitting functional layer, and a second conductive layer stacked in sequence. The first conductive layer is located between the second isolation structure and the substrate, and at least part of the first conductive layer is exposed in the second isolation opening. The second light-emitting functional layer and the second conductive layer are located in the second isolation opening, and the second conductive layer overlaps with the second isolation structure; The second light-emitting functional layer is arranged on the same layer as the first light-emitting functional layer, the first conductive layer is arranged on the same layer as the first electrode layer, and the second conductive layer is arranged on the same layer as the second electrode layer.

[0013] In one embodiment, the display module further includes a non-alignment mark area that is located on at least part of the circumferential side of the display area; The display module further includes a third isolation structure that is located in the non-alignment mark area, and the third isolation structure is arranged on the same layer as the first isolation structure; Preferably, the display module 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 encloses a plurality of third isolation openings, and the display module further includes a second redundant light-emitting device. At least part of the second redundant light-emitting device is located in the third isolation openings, and at least part of the second redundant light-emitting device overlaps with the third isolation structure; Preferably, the second redundant light-emitting device is arranged on the same layer as the light-emitting device; Preferably, the second isolation structure is electrically connected to the third isolation structure.

[0014] In one embodiment, the display module further includes a border area that at least partially surrounds the display area, and the alignment mark area is located in the border area. The display module further includes: touch traces located in the border area, and the orthographic projection of the touch traces on the substrate partially overlaps with the orthographic projection of the second isolation structure on the substrate.

[0015] In one embodiment, the second isolation opening includes a first sub-isolation opening adjacent to the display area, and the orthographic projection of the touch traces on the substrate is spaced from the edge of the part of the first sub-isolation opening close to the display area in the orthographic projection on the substrate. Preferably, the display module further includes a border area located on at least part of the peripheral side of the display area, and the alignment mark area is located in the border area. The display module further includes: a cover plate located on the side of the touch traces away from the substrate, and 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.

[0016] In a second aspect of the present application, a display module is provided. The display module includes a display area and an alignment mark area, and the alignment mark area is located on at least part of the peripheral side of the display area. The display module includes: a substrate; a first isolation structure located on 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 located on the same side of the substrate as the first isolation structure and in the alignment mark area, and the second isolation structure encloses a plurality of second isolation openings. The distance from the side of the second isolation structure away from the substrate to the substrate is different from the distance from the side of the first isolation structure away from the substrate to the substrate; a plurality of light-emitting devices, and at least part of the light-emitting devices are located in the first isolation openings.

[0017] In one embodiment, the first isolation structure includes a first part and a second part stacked on each other, 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 seventh part, a third part and a fourth part stacked on each other. 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 overlaps with the orthographic projection of the third part on the substrate; the orthographic projection of the seventh part on the substrate overlaps with the orthographic projection of the third part on the substrate. The first part and the third part are arranged on the same layer, and the second part and the fourth part are arranged on the same layer; or, The second isolation structure includes a fourth part, and the fourth part is arranged on the same layer as the second part.

[0018] In one embodiment, the first isolation structure further includes a fifth portion, which is located on a side of the second portion close to the substrate, and an orthographic projection of the second portion on the substrate is located within the range of an orthographic projection of the fifth portion on the substrate; The second isolation structure also includes a sixth part, which is located on a side of the fourth part close to the substrate. The orthographic projection of the fourth part on the substrate is located within the orthographic projection range of the sixth part on the substrate. The fifth part and the sixth part are arranged on the same layer.

[0019] A third aspect of the present application provides a method for preparing a display module, 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; A first isolation structure is prepared on a side of the first electrode layer facing away from the substrate, and a second isolation structure is prepared on a side of the first conductive layer facing away from the substrate; the first isolation structure encloses a plurality of first isolation openings, and at least a portion of the first electrode layer is exposed in the first isolation openings; and the reflectivity of the second isolation structure is different from the reflectivity of the first isolation structure; A first light-emitting functional layer and a second electrode layer are sequentially prepared in the first isolation opening to obtain a plurality of light-emitting devices.

[0020] In one embodiment, the steps of preparing a first isolation structure on a side of the first electrode layer facing away from the substrate and preparing a second isolation structure on a side of the first conductive layer facing away from the substrate include: 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 frame area; The first isolation material layer is patterned to obtain a first portion, wherein the first isolation material layer corresponding to the alignment mark area is removed; The second isolation material layer and the third isolation material layer are patterned to obtain a first isolation structure and a second isolation structure.

[0021] According to the display module provided in the embodiment of the present application, the reflectivity of the second isolation structure located in the alignment mark area is different from the reflectivity of the first isolation structure located in the display area. When the display module is aligned, the alignment mark area can be clearly identified, which is beneficial to obtain the boundary of the display area. For example, when the display panel and the cover plate in the display module are aligned, it is beneficial to accurately fit the cover plate and the display panel, and the alignment accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 3 Schematic top - view structure diagram of a display module in another embodiment of the present application.

[0025] Figure 4 Schematic top - view structure diagram of a display module in another embodiment of the present application.

[0026] Figure 5 Schematic cross - sectional structure diagram of a display module in the prior art.

[0027] Figure 6 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0028] Figure 7 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0029] Figure 8 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0030] Figure 9 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0031] Figure 10 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0032] Figure 11 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0033] Figure 12 Schematic top - view structure diagram of a display module in another embodiment of the present application.

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

[0035] Figure 14 Schematic cross - sectional structure diagram of a display module in another embodiment of the present application.

[0036] Figure 15 Schematic flow diagram of the manufacturing method of a display module in an embodiment of the present application.

[0037] Figure 16 Schematic structure diagram of preparing a third isolation material layer, a second isolation material layer, and a first isolation material layer on the side of the first electrode layer away from the substrate in an embodiment of the present application.

[0038] Figure 17 Schematic structure diagram of patterning the first isolation material layer to obtain a first part in an embodiment of the present application.

[0039] Figure 18Schematic structural diagram of patterning the second isolation material layer and the third isolation material layer using a second photoresist in an embodiment of the present application.

[0040] Figure 19 Schematic flow diagram of the alignment method for a display module in an embodiment of the present application.

[0041] Figure 20 Schematic structural diagram of a first image in an embodiment of the present application. Detailed implementation manners

[0042] 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.

[0043] 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 also 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 to highlight the gist of the present application.

[0044] 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.

[0045] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0046] The first aspect of the present application provides a display module. Referring to Figure 1 the cross-sectional structural diagram of the display module shown, the display module 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 periphery of the display area AA.

[0047] Optionally, the display module 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 module.

[0048] Optionally, referring to Figures 2 to 4 the top view structural diagram of the display module 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.

[0049] 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 conducive to realizing accurate alignment between the display panel and other film layers, such as 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.

[0050] Optionally, the display module includes: a substrate 100, a first isolation structure 200, a second isolation structure 300, and a plurality of light-emitting devices 400.

[0051] For example, the structure formed by the substrate 100, the first isolation structure 200, the second isolation structure 300, and the plurality of light-emitting devices 400 is the display panel in the display module.

[0052] 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.

[0053] Optionally, 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 part of the first electrode layer 410 is exposed in the first isolation openings 210; the first light-emitting functional layer 420 and the second electrode layer 430 are located in the first isolation openings 210.

[0054] 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).

[0055] 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. The second isolation structure 300 defines a plurality of second isolation openings 310; the reflectivity of the second isolation structure 300 is different from that of the first isolation structure 200. According to the display module provided by the embodiments of the present application, the reflectivity of the second isolation structure 300 located in the alignment mark area S1 is different from that of the first isolation structure 200 located in the display area AA. When aligning the display module, the alignment mark area S1 can be clearly recognized. For example, when aligning the display panel in the display module with the cover plate, it is beneficial to accurately fit the cover plate and the display panel, and the alignment accuracy is relatively high.

[0056] The inventors of the present application found that in the display module of the prior art, with reference to Figure 5Schematic cross-sectional structure diagram of the display module shown. In the display area AA and the border area NA, the structures of the first isolation structure 200 and the second isolation structure 300 are basically the same, that is, the size of the second isolation opening 310 is the same as the size of the first isolation opening 210, and / or the distribution of the second isolation opening 310 is the same as the distribution of the first isolation opening 210, and the materials forming the first isolation structure 200 and the second isolation structure 300 are exactly the same. This is beneficial to improving the etching uniformity of the first isolation opening 210 when manufacturing the first isolation structure 200 and the second isolation structure 300, and is conducive to improving the yield of the display module. However, the problem in the prior art is that due to the consistency of the structures and materials of the first isolation structure 200 and the second isolation structure 300, when aligning the display module, 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 outer shapes of the cover plate and the display panel during alignment. There are problems with the cutting accuracy of the display panel or the cover plate, resulting in a low fitting accuracy, and thus a low yield of the obtained display module.

[0057] In view of the above problems, the inventors of the present application improved the structure of the second isolation structure 300 in the prior art in the border area NA. For example, a alignment mark area S1 is set in the border area NA, and the reflectivity of the second isolation structure 300 in the alignment mark area S1 is different from the reflectivity of the first isolation structure 200. In this way, 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.

[0058] In one embodiment, the reflectivity of the second isolation structure 300 is greater than the reflectivity of the first isolation structure 200.

[0059] Optionally, the ratio of the reflectivity of the second isolation structure 300 to the reflectivity of the first isolation structure 200 is 2 to 10, for example, it can be 2, 3, 4, 5, 6, 7, 8, 9 or 10, etc.; the difference between the reflectivity of the second isolation structure 300 and the reflectivity of the first isolation structure 200 is appropriate, which is conducive to accurately identifying the second isolation structure 300 when aligning the display module.

[0060] Exemplarily, the reflectivity of the second isolation structure is greater than or equal to 50% and less than or equal to 100%, for example, it can be 50%, 60%, 70%, 80%, 90% or 100%, etc.; the reflectivity of the first isolation structure is greater than or equal to 10% and less than or equal to 40%, for example, it can be 10%, 20%, 30% or 40%, etc.

[0061] It can be understood that the thickness of the second isolation structure 300 may be the same as or different from that of the first isolation structure 200.

[0062] Exemplarily, when the thickness of the second isolation structure 300 is the same as that of the first isolation structure 200, the probe of the optical charge-coupled device (CCD) needs to capture the reflectivity of the surfaces of the second isolation structure 300 and the first isolation structure 200 facing away from the substrate 100, and compare the in-plane reflectivities, so as to obtain the position of the alignment mark area S1, and then the edge position of the display area AA can be obtained.

[0063] Optionally, the thickness of the first isolation structure 200 is different from that of the second isolation structure 300. For example, when the thickness of the first isolation structure 200 is greater than that of the second isolation structure 300, the probe of the optical charge-coupled device captures the reflectivity of the plane where the surface of the second isolation structure 300 facing away from the substrate 100 is located (it can be understood that the reflectivity of the first isolation structure 200 in this plane is 0), and compares the in-plane reflectivities, so as to obtain the position of the alignment mark area S1, and then the edge position of the display area AA can be obtained; for another example, when the thickness of the first isolation structure 200 is greater than that of the second isolation structure 300, the probe of the optical charge-coupled device captures the reflectivity of the plane where the surface of the first isolation structure 200 facing away from the substrate 100 is located (it can be understood that the reflectivity of the second isolation structure 300 in this plane is 0), and compares the in-plane reflectivities, so as to obtain the position of the alignment mark area S1, and then the edge position of the display area AA can be obtained.

[0064] In one embodiment, referring to Figure 1, the first isolation structure 200 includes an overlapping 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. 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 overlapping film layers. For example, the second part 202 is formed by overlapping 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 overlaps 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 full-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.

[0065] Optionally, the second isolation structure 300 includes an overlapping 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. The orthographic projection of the fourth part 302 on the substrate 100 overlaps with the orthographic projection of the third part 301 on the substrate 100; the reflectivity of the third part 301 is different from the reflectivity of the first part 201.

[0066] For example, 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.

[0067] For example, the first isolation structure 200 and the second isolation structure 300 can be prepared through the same preparation process and with the same materials. Exemplarily, 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. Exemplarily, the reflectivity of the third part 301 is greater than the reflectivity of the first part 201. At this time, when aligning the display module, the probe of the optical charge-coupled device grabs the reflectivity of the plane where the surfaces of the first part 201 and the third part 301 away from the substrate 100 are located. There is a difference in the reflectivity between the first part 201 and the third part 301, which is conducive to determining the boundary of the display area AA.

[0068] In one embodiment, referring to Figure 6 , 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. 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.

[0069] Optionally, the third part 301 is provided on the same layer as the second part 202, and the fourth part 302 is provided on the same layer as the fifth part 203. Exemplarily, the orthographic projection of the third part 301 on the substrate 100 is within the orthographic projection range of the fourth part 302 on the substrate 100.

[0070] Exemplarily, the material of the third part 301 is the same as that of the second part 202, and the material of the fourth part 302 is the same as that of the fifth part 203. For example, the material of the third part 301 includes aluminum, and the material of the first part 201 includes titanium. At this time, the thickness of the first isolation structure 200 is greater than that of the second isolation structure 300, and the reflectivity of the first isolation structure 200 is less than the reflectivity of the second isolation structure 300.

[0071] It should be noted that the reflectivity in this article refers to the reflectivity of the surface of the film layer facing away from the substrate 100. Taking the reflectivity of the third part 301 as an example, the reflectivity of the third part 301 refers to the reflectivity of the surface of the third part 301 facing away from the substrate 100.

[0072] It should be noted that the thickness in this article refers to the thickness in the direction perpendicular to the plane where the substrate 100 is located. Taking the thickness of the first isolation structure 200 as an example, the thickness of the first isolation structure 200 refers to the thickness of the first isolation structure 200 in the direction perpendicular to the plane where the substrate 100 is located.

[0073] In one embodiment, referring to Figure 7 the cross-sectional structure schematic diagram of the display module shown, 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. The orthographic projection of the fourth part 302 on the substrate 100 is within the orthographic projection range of the sixth part 303 on 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.

[0074] Optionally, the first part 201 is provided on the same layer as the third part 301, the second part 202 is provided on the same layer as the fourth part 302, and the fifth part 203 is provided on the same layer as the sixth part 303. Thus, the first isolation structure 200 and the second isolation structure 300 can be prepared by the same manufacturing process. At this time, the reflectivity of the first part 201 is different from that of the third part 301. For example, different materials can be used to prepare the first part 201 and the third part 301.

[0075] In one embodiment, referring to Figure 8Schematic cross-sectional structure diagram of the display module shown. The first isolation structure 200 includes a first part 201 and a second part 202 stacked thereon. The first part 201 is located on the side of the second part 202 away from the substrate 100. 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. The second isolation structure 300 includes a seventh part 304, a third part 301, and a fourth part 302 stacked thereon. The third part 301 is located on the side of the fourth part 302 away from the substrate 100. There is an overlap between the orthographic projection of the fourth part 302 on the substrate 100 and the orthographic projection of the third part 301 on the substrate 100. There is an overlap between the orthographic projection of the seventh part 304 on the substrate 100 and the orthographic projection of the third part 301 on the substrate 100. 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. The reflectivity of the seventh part 304 is different from the reflectivity of the first part 201. At this time, the thickness of the first isolation structure 200 is less than the thickness of the second isolation structure 300. Exemplarily, the reflectivity of the seventh part 304 is greater than the reflectivity of the first part 201. For example, when aligning the display module, the probe of the optical charge-coupled device grabs the reflectivity of the plane where the surface of the seventh part 304 away from the substrate 100 is located. At this time, the reflectivity at the plane corresponding to the first part 201 is 0, which is beneficial for determining the boundary of the display area AA. Another example is that when aligning the display module, the probe of the optical charge-coupled device grabs the reflectivity of the plane where the surface of the first part 201 away from the substrate 100 is located. At this time, the reflectivity at the plane corresponding to the third part 301 is 0, which is beneficial for determining the boundary of the display area AA.

[0076] For example, the material of the seventh part 304 includes aluminum, and the material of the first part 201 includes titanium.

[0077] Optionally, 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, referring to Figure 4 , in the first direction x and the second direction y, the first sub-isolation opening 311 is arranged along the edge of the display area AA. In a preferred embodiment, the second isolation structure 300 surrounds the display area AA. At this time, the effect of the probe of the optical charge-coupled device grabbing the second isolation structure 300 is better, and the effect of identifying the boundary of the display area AA is better.

[0078] 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. Thus, when the probe of the optical charge-coupled device grabs the edges of the first sub-isolation openings 311 located on the same straight line, it is more conducive to determining the boundary of the display area AA. Exemplarily, the distance between the orthographic projection of the first sub-isolation opening 311 on the substrate 100 near the edge of the display area AA and the display area AA is a preset distance. After the probe of the optical charge-coupled device grabs the edges of the first sub-isolation openings 311 located on the same straight line and performs corresponding calculations on the position of this straight line and the preset distance, the boundary of the display area AA can be obtained.

[0079] Exemplarily, the isolation structure between the adjacent first isolation openings 210 and second isolation openings 310 is the first isolation structure 200.

[0080] In one embodiment, referring to Figure 1 , the display module further includes a first redundant light-emitting device 500, and at least a part of the first redundant light-emitting device 500 is located in the second isolation opening 310; the first redundant light-emitting device 500 is arranged on the same layer as the light-emitting device 400.

[0081] For example, the first redundant light-emitting device 500 and the light-emitting device 400 are prepared through the same manufacturing process.

[0082] Optionally, the first redundant light-emitting device 500 includes a first conductive layer 510, a second light-emitting functional layer 520, and a second conductive layer 530 stacked in sequence. The first conductive layer 510 is located between the second isolation structure 300 and the substrate 100, and at least a part of the first conductive layer 510 is exposed in the second isolation opening 310. The second light-emitting functional layer 520 and the second conductive layer 530 are located in the second isolation opening 310, and the second conductive layer 530 is overlapped with the second isolation structure 300. Thus, the second isolation structure 300 is conductive, and after overlapping with the second conductive layer 530, it can serve as a shielding layer to prevent interference between the in-panel gate drive signal lines (GiP signal lines) and touch traces (TP trace lines) in the substrate 100.

[0083] Exemplarily, the second light-emitting functional layer 520 is arranged on the same layer as the first light-emitting functional layer 420, the first conductive layer 510 is arranged on the same layer as the first electrode layer 410, and the second conductive layer 530 is arranged on the same layer as the second electrode layer 430.

[0084] In one embodiment, referring to Figure 4 , the display module further includes a non-alignment identification area S2, and the non-alignment identification area S2 is located on at least part of the periphery 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.

[0085] Optionally, referring to Figure 9 the schematic cross-sectional structure diagram of the display module shown in FIG., the display module further includes a third isolation structure 600, which is located in the non-alignment identification area S2, and the third isolation structure 600 is arranged on the same layer as the first isolation structure 200.

[0086] Optionally, the third isolation structure 600 encloses a plurality of third isolation openings 610. The display module further includes a second redundant light-emitting device 700. At least part of the second redundant light-emitting device 700 is located in the third isolation openings 610, and at least part of the second redundant light-emitting device 700 overlaps with the third isolation structure 600. For example, the second redundant light-emitting device 700 includes a third conductive layer 710, a third light-emitting functional layer 720, and a fourth conductive layer 730, and the fourth conductive layer 730 overlaps with the third isolation structure 600. Thus, the third isolation structure 600 is conductive. After overlapping with the fourth conductive layer 730, it can serve as a shielding layer to prevent interference between the gate driving signal line (GiP signal line) and the touch trace 800 (TP trace line) in the substrate 100.

[0087] Optionally, the second redundant light-emitting device 700 is arranged on the same layer as the light-emitting device 400. Exemplarily, the third light-emitting functional layer 720 is arranged on the same layer as the first light-emitting functional layer 420, the third conductive layer 710 is arranged on the same layer as the first electrode layer 410, and the fourth conductive layer 730 is arranged on the same layer as the second electrode layer 430. The third isolation structure 600 and the second redundant light-emitting device 700 can be prepared by using the same manufacturing process.

[0088] 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 connected.

[0089] 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.

[0090] Exemplarily, the display module may further include a pixel defining layer 1000, which is located between the substrate 100 and the first isolation structure 200, the second isolation structure 300, and the third isolation structure 600. The pixel defining layer 1000 defines a pixel opening 1100, a first redundant pixel opening 1200, and a second redundant pixel opening 1300; the orthographic projection of the pixel opening 1100 on the substrate 100 is within the orthographic projection range of the first isolation opening 210 on the substrate 100; the orthographic projection of the first redundant pixel opening 1200 on the substrate 100 is within the orthographic projection range of the second isolation opening 310 on the substrate 100; the orthographic projection of the second redundant pixel opening 1300 on the substrate 100 is within the orthographic projection range of the third isolation opening 610 on the substrate 100; the first electrode layer 410 is exposed in the connected first isolation opening 210 and pixel opening 1100; the first conductive layer 510 is exposed in the connected first redundant pixel opening 1200 and second isolation opening 310; the third conductive layer 710 is exposed in the connected second redundant pixel opening 1300 and third isolation opening 610.

[0091] Exemplarily, the substrate 100 may be a substrate substrate. In some embodiments, the substrate substrate may be a glass-based substrate. In some embodiments, the substrate substrate may include an organic resin material such as epoxy resin, triazine, silicone resin, or polyimide. For example, the substrate substrate may be an FR4 type printed circuit board (PCB), or may be a flexible PCB that is easy to deform. In some embodiments, the substrate substrate may 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 may be a metal core printed circuit board (MCPCB) or a metal copper clad laminate (MCCL).

[0092] For example, the substrate 100 includes gate driving 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 second isolation structure 300 and the first redundant light-emitting device 500 overlap, and the third isolation structure 600 and the second redundant light-emitting device 700 overlap, forming a conductive layer in the entire border area, which is conducive to avoiding interference between the GiP signal lines and the touch traces.

[0093] It should be noted that in this article, the film layers disposed on the same layer can be prepared by the same process, or the film layers disposed on the same layer can be prepared by the same preparation process and using the same materials.

[0094] It should be noted that Figures 1 to 10 in Figure 1 、Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10 may be Figure 4 a schematic cross-sectional structure diagram along the AA' direction in Figure 9 may be Figure 4 a schematic cross-sectional structure diagram along the BB' direction in

[0095] Optionally, referring to Figure 11 the schematic cross-sectional structure diagram of the display module shown, the display module further includes a touch trace 800.

[0096] 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 overlaps partially with the orthographic projection of the second isolation structure 300 on the substrate 100 (specifically referring to Figure 12 and Figure 13 the schematic top view structure diagram of the display module shown). Thus, the setting of the touch trace 800 has a relatively small shielding effect on the second isolation structure 300, which is beneficial for accurately identifying the alignment mark area S1.

[0097] Exemplarily, the second isolation opening 310 includes a first sub-isolation opening 311, and the orthographic projection of the touch trace 800 on the substrate 100 is spaced apart from the orthographic projection of the edge of the first sub-isolation opening 311 close to the display area AA on the substrate 100.

[0098] 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 second isolation opening 310 close to the display area AA meets the alignment and grasping length, the requirements can be met.

[0099] It can be understood that on the side of the first isolation structure 200 and the second isolation structure 300 facing 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.

[0100] In one embodiment, referring to Figure 14 the schematic cross-sectional structure diagram of the display module shown, the display module further includes: a cover plate 900, located on the side of the touch trace 800 facing away from the substrate 100, and 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.

[0101] It can be understood that an optical adhesive layer 50 can be used to flatten the side of the touch trace 800 facing away from the substrate 100, facilitating the bonding of the cover plate 900.

[0102] 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.

[0103] It can be understood that during alignment, the boundary of the transparent area 920 needs to be aligned with the boundary of the display area AA to achieve high-precision bonding of the cover plate 900 and the display panel.

[0104] It should be noted that the display module in this embodiment can be integrally or partially combined with the display module described above, and will not be elaborated here.

[0105] It should be noted that Figure 11 and Figure 14 can be Figure 12 the cross-sectional structure schematic diagram along the CC' direction in

[0106] The second aspect of the present application provides a display module. Referring to Figure 1 , the display module includes a display area AA and an alignment mark area S1. The alignment mark area S1 is located on at least part of the periphery of the display area AA.

[0107] Optionally, the display module 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 module.

[0108] Optionally, the display module includes: a substrate 100, a first isolation structure 200, a second isolation structure 300, and a plurality of light-emitting devices 400.

[0109] 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 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.

[0110] 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. The second isolation structure 300 defines a plurality of second isolation openings 310. The distance from the side of the second isolation structure 300 facing away from the substrate 100 to the substrate 100 is different from the distance from the side of the first isolation structure 200 facing away from the substrate 100 to the substrate. For example, when the distance from the side of the first isolation structure 200 facing away from the substrate 100 to the substrate is greater than the distance from the side of the second isolation structure 300 facing away from the substrate 100 to the substrate, the probe of the optical charge coupled device can capture the reflectivity of the plane where the surface of the second isolation structure 300 facing away from the substrate 100 is located (it can be understood that the reflectivity of the first isolation structure 200 in this plane is 0), and compare the in-plane reflectivities, so as to obtain the position of the alignment mark area S1, and then be able to obtain the edge position of the display area AA. Another example is that when the distance from the side of the first isolation structure 200 facing away from the substrate 100 to the substrate is greater than the distance from the side of the second isolation structure 300 facing away from the substrate 100 to the substrate, the probe of the optical charge coupled device can capture the reflectivity of the plane where the surface of the first isolation structure 200 facing away from the substrate 100 is located (it can be understood that the reflectivity of the second isolation structure 300 in this plane is 0), and compare the in-plane reflectivities, so as to obtain the position of the alignment mark area S1, and then be able to obtain the edge position of the display area AA.

[0111] In one embodiment, referring to Figure 6 , the first isolation structure 200 includes a first part 201 and a second part 202 stacked on top of each other. The first part 201 is located on the side of the second part 202 facing away from the substrate 100. 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. The second isolation structure 300 includes a seventh part 304, a third part 301 and a fourth part 302 stacked on top of each other. The third part 301 is located on the side of the fourth part 302 facing away from the substrate 100. The orthographic projection of the fourth part 302 on the substrate 100 overlaps with the orthographic projection of the third part 301 on the substrate 100. The orthographic projection of the seventh part 304 on the substrate 100 overlaps with the orthographic projection of the third part 301 on the substrate 100. 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. At this time, the thickness of the second isolation structure 300 is relatively large.

[0112] Exemplarily, referring to Figure 10 the cross-sectional structure schematic diagram of the display module shown, the second isolation structure 300 includes a fourth part 302. The second part 202 and the fourth part 302 are arranged on the same layer. At this time, the thickness of the second isolation structure 300 is relatively small.

[0113] In one embodiment, the first isolation structure 200 further includes a fifth portion 203 located on the side of the second portion 202 closer 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. The second isolation structure 300 further includes a sixth portion 303 located on the side of the fourth portion 302 closer 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. The fifth portion 203 and the sixth portion 303 are arranged on the same layer.

[0114] It should be noted that the display module in this embodiment can be integrally or partially combined with the display module described above, and will not be elaborated here.

[0115] The third aspect of the present application provides a method for manufacturing a display module. Referring to Figure 15 the schematic flowchart of the method for manufacturing the display module shown, the method for manufacturing the display module includes the following steps.

[0116] S100: Prepare a first electrode layer on one side of the substrate and within the display area, and prepare a first conductive layer within the alignment mark area.

[0117] 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 will not be elaborated here.

[0118] S200: Prepare a first isolation structure on the side of the first electrode layer facing away from the substrate, and prepare a second isolation structure on the side of the first conductive layer facing away from the substrate; the first isolation structure encloses a plurality of first isolation openings, and at least part of the first electrode layer is exposed in the first isolation openings.

[0119] Among them, the reflectivity of the second isolation structure is different from that of the first isolation structure.

[0120] It should be noted that the first isolation structure and the second isolation structure are the same as those described above, and will not be elaborated here.

[0121] In one embodiment, the step of preparing a first isolation structure on the side of the first electrode layer facing away from the substrate and preparing a second isolation structure on the side of the first conductive layer facing away from the substrate includes: on the side of the first electrode layer 410 facing away from the substrate 100, sequentially prepare a third isolation material layer 23, a second isolation material layer 22, and a first isolation material layer 21 within the display area AA and the border area NA, specifically referring to Figure 16 ; perform patterning on the first isolation material layer 21 to obtain a first portion 201, and the first isolation material layer 21 corresponding to the alignment mark area S1 is removed, specifically referring to Figure 17; Pattern the second isolation material layer 22 and the third isolation material layer 23 to obtain a first isolation structure 200 and a second isolation structure 300 (specifically refer to Figure 18 and Figure 6 ).

[0122] It should be noted that Figure 16 20 in it represents the pixel defining material layer. After opening pixel openings in the pixel defining material, a pixel defining layer is obtained.

[0123] It should be noted that in Figure 17 , a first photoresist 30 is used to pattern the first isolation material layer 21 to obtain a first part 201.

[0124] It should be noted that in Figure 18 , a second photoresist 40 is used to pattern the second isolation material layer 22 and the third isolation material layer 23.

[0125] S300: Sequentially prepare a first light-emitting functional layer and a second electrode layer in the first isolation opening to obtain a plurality of light-emitting devices.

[0126] It should be noted that the light-emitting devices are the same as those described above and will not be elaborated here.

[0127] Exemplarily, while preparing the light-emitting devices, a first redundant light-emitting device is prepared in the second isolation opening, and a second redundant light-emitting device is prepared in the third isolation opening.

[0128] It should be noted that the display module prepared by the preparation method of this embodiment can be integrally or partially combined with the display module described above and will not be elaborated here.

[0129] The fourth aspect of this application provides a method for aligning a display module. Refer to the flow chart of the method for aligning a display module shown in Figure 19 . The method for aligning a display module includes the following steps.

[0130] S400: Obtain a first image of a first surface flush with the surface of the second isolation structure facing away from the substrate, and obtain a second image of the cover plate.

[0131] Among them, on the first surface, the reflectivity of the first isolation structure is different from that of the second isolation structure.

[0132] In one embodiment, the first isolation structure includes a stacked first part, second part, and third part. The first part is located on the side of the second part away from 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. The second part and the third part are on the same layer, and the fourth part and the fifth part are on the same layer. Obtaining a first image of a first surface flush with the surface of the second isolation structure away from the substrate includes: obtaining an image of a plane flush with the surface of the second part away from the substrate and the surface of the third part away from the substrate. At the first surface, the reflectivities of the second part and the third part are different, and the first part is further provided on the side of the second part away from the substrate. Therefore, at the first surface, the reflectivity of the second part is almost 0. In the first image, the position corresponding to the third part is brighter, and the position corresponding to the first part is darker. The reflectivity of the third part is higher, which is convenient for accurately identifying the third part.

[0133] S500: Determine the boundary of the display area or the border area based on the first image, and determine the boundary of the ink area based on the second image.

[0134] In one embodiment, the second isolation structure 300 encloses a plurality of second isolation openings 310. The second isolation openings 310 include a first sub-isolation opening 311, and the first sub-isolation opening 311 is adjacent to the display area AA.

[0135] Optionally, the step of determining the boundary of the border area based on the first image (a schematic diagram of the first image can be referred to Figure 20 ) includes: determining the edge of the first sub-isolation opening 311 close to the display area AA based on the first image; in the first direction x, fitting the edges on the same side of the display area AA into a first straight line L1; in the second direction y, fitting the edges on the same side of the display area AA into a second straight line L2; the first direction x intersects with the second direction y; determining the boundary of the display area AA or the border area NA based on the first straight line L1 and the second straight line L2.

[0136] 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 area AA and the boundary of the display area AA. After identifying the first straight line L1 and the second straight line L2, performing an operation on the positions of the first straight line L1 and the second straight line L2 with the preset distance can obtain the boundary position of the display area AA.

[0137] Similarly, the reflectivities of the ink area and the transparent area of the cover plate are 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.

[0138] S600: Align 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.

[0139] It should be noted that the display module of this embodiment can be integrally or partially combined with the display module described above, and will not be elaborated here.

[0140] 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, benefits, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for illustrative and easy-to-understand purposes and are not limitations. The above details do not limit the present application to necessarily adopt the above specific details for implementation.

[0141] 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 module, characterized in that, The display module includes a display area and an alignment mark area, and the alignment mark area is located on at least a part of the periphery of the display 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 surrounding a plurality of first isolation openings; a second isolation structure, on the same side of the substrate as the first isolation structure and within the alignment mark area, the second isolation structure surrounding a plurality of second isolation openings, the reflectivity of the second isolation structure being different from the reflectivity of the first isolation structure; a plurality of light-emitting devices, at least some of the light-emitting devices being located within the first isolation openings.

2. The display module according to claim 1, wherein The reflectivity of the second isolation structure is greater than the reflectivity of the first isolation structure; Preferably, the ratio of the reflectivity of the second isolation structure to the reflectivity of the first isolation structure is 2 to 10; Preferably, the reflectivity of the second isolation structure is greater than or equal to 50% and less than or equal to 100%; the reflectivity of the first isolation structure is greater than or equal to 10% and less than or equal to 40%; Preferably, the thickness of the first isolation structure is different from the thickness of the second isolation structure.

3. The display module according to claim 1, wherein The first isolation structure includes a first part and a second part stacked thereon, the first part being located on the side of the second part away from the substrate, and the orthographic projection of the second part on the substrate being within the orthographic projection of the first part on the substrate; The second isolation structure includes a third part and a fourth part stacked thereon, the third part being located on the side of the fourth part away from the substrate, and the orthographic projection of the fourth part on the substrate overlapping the orthographic projection of the third part on the substrate; the reflectivity of the third part being different from the reflectivity of the first part; Preferably, the reflectivity of the third part is greater than the reflectivity of the first part; Preferably, the first part and the third part are provided on the same layer, and the second part and the fourth part are provided on the same layer.

4. The display module according to claim 3, wherein, 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 being within the orthographic projection of the fifth part on the substrate; Preferably, the material of the third part is the same as the material of the second part, and / or the material of the fourth part is the same as the material of the fifth part; Preferably, the material of the third part includes aluminum, and the material of the first part includes titanium; Preferably, the third part and the second part are provided on the same layer, and the fourth part and the fifth part are provided on the same layer.

5. The display module according to claim 4, characterized in that, The second isolation structure further includes a sixth part, located on the side of the fourth part close to the substrate, the orthographic projection of the fourth part on the substrate being within the orthographic projection of the sixth part on the substrate, and the orthographic projection of the fourth part on the substrate being within the orthographic projection of the third part on the substrate; Preferably, the first part and the third part are provided on the same layer, the second part and the fourth part are provided on the same layer, and the fifth part and the sixth part are provided on the same layer.

6. The display module according to claim 1, wherein The first isolation structure includes a first part and a second part which are stacked, the first part is located on a side of the second part away from the substrate, and a positive projection of the second part on the substrate is within a positive projection range of the first part on the substrate; The second isolation structure includes a seventh part, a third part and a fourth part which are stacked, the third part is located on a side of the fourth part away from the substrate, there is an overlap between a positive projection of the fourth part on the substrate and a positive projection of the third part on the substrate, there is an overlap between a positive projection of the seventh part on the substrate and a positive projection of the third part on the substrate, the first part and the third part are arranged on the same layer, and the second part and the fourth part are arranged on the same layer; The reflectivity of the seventh part is different from that of the first part; Preferably, the reflectivity of the seventh part is greater than that of the first part.

7. The display module according to claim 1, wherein, The display module further includes a border area, at least part of the border area 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, the first sub-isolation opening is adjacent to an edge of the display area and is arranged circumferentially along the edge of the display area; Preferably, a positive projection of the first sub-isolation opening on the substrate near the edge of the display area is on the same straight line.

8. The display module according to claim 1, wherein The display module further includes a first redundant light-emitting device, and at least part of the first redundant light-emitting device is located in the second isolation opening; Preferably, the first redundant light-emitting device and the light-emitting device are arranged on the same layer; Preferably, the light-emitting device includes a first electrode layer, a first light-emitting functional layer and a second electrode layer which 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 redundant light-emitting device includes a first conductive layer, a second light-emitting functional layer and a second conductive layer which are stacked in sequence, the first conductive layer is located between the second isolation structure and the substrate, and at least part of the first conductive layer is exposed in the second isolation opening, the second light-emitting functional layer and the second conductive layer are located in the second isolation opening, and the second conductive layer is lapped with the second isolation structure; The second light-emitting functional layer and the first light-emitting functional layer are arranged on the same layer, the first conductive layer and the first electrode layer are arranged on the same layer, and the second conductive layer and the second electrode layer are arranged on the same layer.

9. The display module according to claim 1, wherein The display module further includes a non-alignment mark area, and the non-alignment mark area is located on at least part of the circumferential side of the display area; The display module further includes a third isolation structure, which is located in the non-alignment mark area, and the third isolation structure is arranged on the same layer as the first isolation structure; Preferably, the display module 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, and the display module further includes second redundant light-emitting devices, at least a part of the second redundant light-emitting devices are located in the third isolation openings, and at least a part of the second redundant light-emitting devices overlap with the third isolation structure; Preferably, the second redundant light-emitting devices are disposed on the same layer as the light-emitting devices; Preferably, the second isolation structure is electrically connected to the third isolation structure.

10. The display module according to claim 1, wherein, The display module further includes a border area that at least partially surrounds the display area, and the alignment identification area is located in the border area; The display module further includes: touch traces located in the border area, and a positive projection of the touch traces on the substrate overlaps at least partially with a positive projection of the second isolation structure on the substrate.

11. The display module according to claim 10, wherein The second isolation opening includes a first sub-isolation opening adjacent to the display area, and a positive projection of the touch traces on the substrate is spaced from a positive projection of an edge of at least a part of the first sub-isolation opening close to the display area on the substrate. Preferably, the display module further includes a border area located on at least a part of the peripheral side of the display area, and the alignment identification area is located in the border area; The display module further includes: a cover plate located on a side of the touch traces away from the substrate, and a positive projection of the cover plate on the substrate covers positive 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 disposed corresponding to the border area, and the transparent area is disposed corresponding to the display area.

12. A display module, characterized in that, The display module includes a display area and an alignment identification area, and the alignment identification area is located on at least a part of the peripheral side of the display area; The display module includes: a substrate; a first isolation structure located on one side of the substrate and in the display area, the first isolation structure defining a plurality of first isolation openings; a second isolation structure on the same side of the substrate as the first isolation structure and in the alignment identification area, the second isolation structure defining a plurality of second isolation openings, and a distance from a side of the second isolation structure away from the substrate to the substrate is different from a distance from a side of the first isolation structure away from the substrate to the substrate; a plurality of light-emitting devices, at least a part of the light-emitting devices are located in the first isolation openings.

13. The display module according to claim 12, wherein The first isolation structure includes a stacked first part and second part, the first part is located on a side of the second part away from the substrate, and a positive projection of the second part on the substrate is within a positive projection of the first part on the substrate; The second isolation structure includes a stacked seventh part, third part and fourth part, the third part is located on a side of the fourth part away from the substrate, and a positive projection of the fourth part on the substrate overlaps with a positive projection of the third part on the substrate; The orthographic projection of the seventh portion on the substrate overlaps with the orthographic projection of the third portion on the substrate, the first portion and the third portion are arranged on the same layer, and the second portion and the fourth portion are arranged on the same layer; or, The second isolation structure includes a fourth portion, and the fourth portion is disposed at the same layer as the second portion.

14. The display module according to claim 13, wherein The first isolation structure further includes a fifth portion, which is located on a side of the second portion close to the substrate, and an 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 also includes a sixth portion, which is located on a side of the fourth portion close to the substrate, the orthographic projection of the fourth portion on the substrate is located within the orthographic projection range of the sixth portion on the substrate, and the fifth portion is arranged on the same layer as the sixth portion.

15. A method for preparing a display module, characterized in that, include: 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; A first isolation structure is prepared on a side of the first electrode layer facing away from the substrate, and a second isolation structure is prepared on a side of the first conductive layer facing away from the substrate; The first isolation structure encloses a plurality of first isolation openings, and at least a portion of the first electrode layer is exposed in the first isolation openings; The reflectivity of the second isolation structure is different from the reflectivity of the first isolation structure; A first light-emitting functional layer and a second electrode layer are sequentially prepared in the first isolation opening to obtain a plurality of light-emitting devices.

16. The preparation method according to claim 15, wherein, The step of preparing a first isolation structure on a side of the first electrode layer away from the substrate and preparing a second isolation structure on a side of the first conductive layer away from the substrate comprises: 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 frame area; Performing a patterning process on the first isolation material layer to obtain a first portion, wherein the first isolation material layer corresponding to the alignment mark area is removed; The second isolation material layer and the third isolation material layer are patterned to obtain the first isolation structure and the second isolation structure.

Images