Display Module and its Manufacturing Method

Abstract

This application provides a display module and its manufacturing method. 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 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 marking area, the second isolation structure enclosing a plurality of second isolation openings; the reflectivity of the second isolation structure is different from that of the first isolation structure; and a plurality of light-emitting devices, at least some of which are located in the first isolation openings. When aligning the display panel and the cover plate, this facilitates precise bonding of the cover plate and the display panel, resulting in high alignment accuracy.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to display modules and their manufacturing methods. Background Technology

[0002] In traditional display panel manufacturing, a fine metal mask (FMM) is typically used to pattern the light-emitting pixels. FMM technology is mature and has extensive mass production experience. However, FMM technology also suffers from limitations in precision, high development costs, and long development cycles. Fine metal mask-less technology eliminates the limitations of traditional OLED processes on display size, resolution, and other screen performance aspects, offering advantages such as high performance, full-size display, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A describe relevant content regarding fine metal mask-less technology and are provided for reference.

[0003] However, current display panels still cannot adequately 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] The first aspect of this application provides a display module, which includes a display area and an alignment mark area, wherein the alignment mark area is located on at least a portion of the periphery of the display area;

[0006] The display module includes:

[0007] substrate;

[0008] The first isolation structure is located on one side of the substrate and in the display area, and the first isolation structure encloses a plurality of first isolation openings;

[0009] The second isolation structure is located on the same side of the substrate as the first isolation structure and is located in the alignment marking area. 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.

[0010] Multiple light-emitting devices, at least some of which are located in the first isolation opening.

[0011] In one embodiment, the reflectivity of the second isolation structure is greater than that of the first isolation structure;

[0012] Preferably, the ratio of the reflectivity of the second isolation structure to the reflectivity of the first isolation structure is 2 to 10;

[0013] 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%.

[0014] Preferably, the thickness of the first isolation structure is different from the thickness of the second isolation structure.

[0015] In one embodiment, the first isolation structure includes a first part and a second part stacked together, 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 range of the first part on the substrate.

[0016] The second isolation structure includes a third part and a fourth part stacked together. 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 reflectivity of the third part is different from that of the first part.

[0017] Preferably, the reflectivity of the third part is greater than that of the first part;

[0018] 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.

[0019] In one embodiment, the first isolation structure further includes a fifth part located on the side of the second part closer to the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the fifth part on the substrate.

[0020] 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;

[0021] Preferably, the material of the third part includes aluminum, and the material of the first part includes titanium;

[0022] Preferably, the third part is arranged on the same layer as the second part, and the fourth part is arranged on the same layer as the fifth part.

[0023] In one embodiment, the second isolation structure further includes a sixth part located on the side of the fourth part close to the substrate, wherein the orthographic projection of the fourth part on the substrate is within the orthographic projection range of the sixth part on 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.

[0024] 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.

[0025] In one embodiment, the first isolation structure includes a first part and a second part stacked together, 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 range of the first part on the substrate.

[0026] The second isolation structure includes a seventh part, a third part, and a fourth part stacked together. 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 disposed on the same layer. The second part and the fourth part are disposed on the same layer.

[0027] The reflectivity of Part 7 is different from that of Part 1;

[0028] Preferably, the reflectivity of the seventh part is greater than that of the first part.

[0029] In one embodiment, the display module further includes a border area that at least partially surrounds the display area, and an alignment mark area is located in the border area;

[0030] 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 and the second direction intersect.

[0031] Preferably, the second isolation opening includes a first sub-isolation opening, which is adjacent to the edge of the display area and arranged circumferentially along the edge of the display area;

[0032] Preferably, the orthographic projection of the first sub-isolation opening on the substrate is on the same straight line as the edge of the display area.

[0033] In one embodiment, the display module further includes a first redundant light-emitting device, at least a portion of which is located in a second isolation opening;

[0034] Preferably, the first redundant light-emitting device is disposed on the same layer as the light-emitting device;

[0035] Preferably, the light-emitting device includes a first electrode layer, a first light-emitting functional layer, and a second electrode layer stacked sequentially, wherein the first electrode layer is located between the first isolation structure and the substrate, and at least a portion 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;

[0036] The first redundant light-emitting device includes a first conductive layer, a second light-emitting functional layer and a second conductive layer stacked sequentially. The first conductive layer is located between the second isolation structure and the substrate, and at least a portion 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.

[0037] The second light-emitting functional layer is disposed in the same layer as the first light-emitting functional layer, the first conductive layer is disposed in the same layer as the first electrode layer, and the second conductive layer is disposed in the same layer as the second electrode layer.

[0038] In one embodiment, the display module further includes a non-alignment marking area, which is located on at least a portion of the periphery of the display area;

[0039] The display module also includes a third isolation structure, located in the non-alignment marking area, and the third isolation structure is set on the same layer as the first isolation structure;

[0040] Preferably, the display module further includes a border area, which at least partially surrounds the display area, and the non-alignment marking area is located in the border area;

[0041] 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 a portion of the second redundant light-emitting device is located in the third isolation opening, and at least a portion of the second redundant light-emitting device overlaps with the third isolation structure;

[0042] Preferably, the second redundant light-emitting device is disposed on the same layer as the light-emitting device;

[0043] Preferably, the second isolation structure is electrically connected to the third isolation structure.

[0044] In one embodiment, the display module further includes a border area that at least partially surrounds the display area, and an alignment mark area is located in the border area;

[0045] The display module also includes: touch traces located in the bezel area, wherein the orthographic projection of the touch traces on the substrate overlaps with the orthographic projection of the second isolation structure on the substrate.

[0046] In one embodiment, the second isolation opening includes a first sub-isolation opening, which is adjacent to the display area. The orthographic projection of the touch trace on the substrate and the orthographic projection of the edge of the first sub-isolation opening near the display area on the substrate are spaced apart.

[0047] Preferably, the display module further includes a border area, which is located on at least a portion of the periphery of the display area, and the alignment mark area is located in the border area;

[0048] The display module also includes: a cover plate, located on the side of the touch trace away from the substrate, the orthographic projection of the cover plate on the substrate covering the orthographic projection of the display area and the bezel area on the substrate;

[0049] Preferably, the cover plate includes an ink area and a transparent area, with the ink area corresponding to the border area and the transparent area corresponding to the display area.

[0050] A second aspect of this application provides a display module, which includes a display area and an alignment mark area, wherein the alignment mark area is located on at least a portion of the periphery of the display area;

[0051] The display module includes:

[0052] substrate;

[0053] The first isolation structure is located on one side of the substrate and in the display area, and the first isolation structure encloses a plurality of first isolation openings;

[0054] The second isolation structure is located on the same side of the substrate as the first isolation structure and is located in the alignment marking area. 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.

[0055] Multiple light-emitting devices, at least some of which are located in the first isolation opening.

[0056] In one embodiment, the first isolation structure includes a first part and a second part stacked together, 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 range of the first part on the substrate.

[0057] The second isolation structure includes a seventh part, a third part, and a fourth part stacked together. 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 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 disposed on the same layer, and the second part and the fourth part are disposed on the same layer; or...

[0058] The second isolation structure includes a fourth part, which is located on the same floor as the second part.

[0059] In one embodiment, the first isolation structure further includes a fifth part located on the side of the second part closer to the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the fifth part on the substrate.

[0060] The second isolation structure also includes a sixth part, located on the side of the fourth part closer to the substrate. The orthographic projection of the fourth part on the substrate is within the orthographic projection range of the sixth part on the substrate. The fifth part and the sixth part are disposed on the same layer.

[0061] A third aspect of this application provides a method for manufacturing a display module, comprising:

[0062] 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 marking area;

[0063] A first isolation structure is prepared on the side of the first electrode layer away from the substrate, and a second isolation structure is prepared on the side of the first conductive layer 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 that of the first isolation structure.

[0064] A first light-emitting functional layer and a second electrode layer are sequentially fabricated in the first isolation opening to obtain multiple light-emitting devices.

[0065] In one embodiment, the steps of fabricating a first isolation structure on the side of the first electrode layer away from the substrate and fabricating a second isolation structure on the side of the first conductive layer away from the substrate include:

[0066] On the 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.

[0067] The first isolation material layer is graphically processed to obtain the first part, and the first isolation material layer corresponding to the alignment mark area is removed;

[0068] The second and third isolation material layers are graphically processed to obtain the first isolation structure and the second isolation structure.

[0069] According to the display module provided in the embodiments of this application, the reflectivity of the second isolation structure located in the alignment mark area is different from that of the first isolation structure located in the display area. When aligning the display module, the alignment mark area can be clearly identified, which is conducive to obtaining the boundary of the display area. For example, when aligning the display panel and the cover plate in the display module, it is conducive to accurately bonding the cover plate and the display panel, and the alignment accuracy is high. Attached Figure Description

[0070] Figure 1 This is a schematic diagram of the cross-sectional structure of the display module in one embodiment of this application.

[0071] Figure 2 This is a top view of the display module in one embodiment of this application.

[0072] Figure 3 This is a top view of the display module in another embodiment of this application.

[0073] Figure 4 This is a top view of the display module in another embodiment of this application.

[0074] Figure 5 This is a schematic diagram of the cross-sectional structure of a display module in the prior art.

[0075] Figure 6 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0076] Figure 7 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0077] Figure 8 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0078] Figure 9 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0079] Figure 10 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0080] Figure 11 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0081] Figure 12 This is a top view of the display module in another embodiment of this application.

[0082] Figure 13 This is a top view of the display module in another embodiment of this application.

[0083] Figure 14 This is a schematic diagram of the cross-sectional structure of the display module in another embodiment of this application.

[0084] Figure 15 This is a schematic diagram of the manufacturing process of a display module in one embodiment of this application.

[0085] Figure 16 This is a schematic diagram of the structure of a third isolation material layer, a second isolation material layer, and a first isolation material layer fabricated on the side of the first electrode layer away from the substrate, according to one embodiment of this application.

[0086] Figure 17 This is a schematic diagram of the structure of the first part obtained by graphical processing of the first isolation material layer in one embodiment of this application.

[0087] Figure 18 This is a schematic diagram of a structure in one embodiment of the present application, in which a second photoresist is used to pattern the second isolation material layer and the third isolation material layer.

[0088] Figure 19 This is a schematic flowchart of the alignment method for the display module in one embodiment of this application.

[0089] Figure 20 This is a schematic diagram of the structure of the first image in one embodiment of this application. Detailed Implementation

[0090] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0091] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods and means well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0092] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0093] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0094] The first aspect of this application provides a display module, as shown in the reference... Figure 1 The diagram shows a cross-sectional structure of the display module, which includes a display area AA and an alignment marking area S1. The alignment marking area S1 is located on at least a portion of the periphery of the display area AA.

[0095] Optionally, the display module also includes a border area NA, which at least partially surrounds the display area AA, and a alignment marker area S1 is located in the border area NA. Therefore, the setting of the alignment marker area S1 has almost no impact on the display effect of the display module.

[0096] Optionally, refer to Figures 2 to 4 The schematic diagram of the top view of the display module shown shows that, 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 and the second direction y intersect.

[0097] For example, refer to Figure 2 In the first direction x, the alignment marker 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 marker area S1 is located on one side of the display area AA; for example, referring to Figure 4 In the first direction x, the alignment marking area S1 is located on both sides of the display area AA; in the second direction y, the alignment marking area S1 is located on both sides of the display area AA. It can be understood that the existence of the alignment marking area S1 enables precise identification of the display panel, thereby facilitating precise alignment between the display panel and other film layers, such as facilitating precise alignment between the display panel and the cover plate. It can also be understood that the larger the area occupied by the alignment marking area S1 in the bezel area NA, the more accurate the alignment.

[0098] 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.

[0099] For example, the structure consisting of substrate 100, first isolation structure 200, second isolation structure 300 and multiple light-emitting devices 400 is the display panel in the display module.

[0100] 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 some of the light-emitting devices 400 are located in the first isolation openings 210.

[0101] 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 sequentially. The first electrode layer 410 is located between the first isolation structure 200 and the substrate 100, and at least a portion of the first electrode layer 410 is exposed in the first isolation opening 210. The first light-emitting functional layer 420 and the second electrode layer 430 are located in the first isolation opening 210.

[0102] For example, the first electrode layer 410 can be an anode, and the second electrode layer 430 can be a cathode. The first light-emitting functional layer 420 includes an emitting layer (EML), and may further include at least one of a hole injection layer (HIL), a hole transport layer (HTL), and an electron-blocking layer (EBL) located between the anode and the emitting layer (EML), and at least one of an electron injection layer (EIL), an electron transport layer (ETL), and a hole-blocking layer (HBL) located between the cathode and the emitting layer (EML).

[0103] 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 marking area S1. The second isolation structure 300 encloses 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 in the embodiments of this application, the reflectivity of the second isolation structure 300 located in the alignment marking 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 marking area S1 can be clearly identified. For example, when aligning the display panel and the cover plate in the display module, it is beneficial to accurately attach the cover plate and the display panel, resulting in high alignment accuracy.

[0104] The inventors of this application discovered that in the prior art display modules, referring to Figure 5 The schematic diagram of the cross-sectional structure of the display module shown illustrates that the structures of the first isolation structure 200 and the second isolation structure 300 are essentially consistent in the display area AA and the bezel area NA. Specifically, the size of the second isolation opening 310 is consistent with the size of the first isolation opening 210, and / or the distribution of the second isolation opening 310 is consistent with the distribution of the first isolation opening 210. Furthermore, the materials forming the first isolation structure 200 and the second isolation structure 300 are identical. This facilitates improved etching uniformity of the first isolation opening 210 during the fabrication of the first isolation structure 200 and the second isolation structure 300, thereby increasing the yield of the display module. However, a problem with the prior art is that the consistency in structure and material between the first isolation structure 200 and the second isolation structure 300 makes it impossible to accurately obtain the edge of the display area AA or the edge of the bezel area NA near the display area AA during alignment of the display module. This results in the only possible alignment being between the cover plate and the shape of the display panel. The display panel or cover plate suffers from cutting precision issues, leading to lower bonding accuracy and consequently, a lower yield of the resulting display module.

[0105] To address the aforementioned problems, the inventors of this application have improved the structure of the second isolation structure 300 in the bezel area NA, as described in the prior art. For example, an alignment mark area S1 is provided in the bezel area NA, and the reflectivity of the second isolation structure 300 within the alignment mark area S1 is made different from that of the first isolation structure 200. Thus, when aligning the display panel and the cover plate, the position of the alignment mark area S1 can be accurately obtained, thereby revealing the edge position of the display area AA and achieving precise alignment of the display panel and the cover plate.

[0106] In one embodiment, the reflectivity of the second isolation structure 300 is greater than that of the first isolation structure 200.

[0107] 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 appropriate difference between the reflectivity of the second isolation structure 300 and the reflectivity of the first isolation structure 200 is beneficial for accurately identifying the second isolation structure 300 when aligning the display module.

[0108] For example, the reflectivity of the second isolation structure is greater than or equal to 50% and less than or equal to 100%, such as 50%, 60%, 70%, 80%, 90% or 100%; the reflectivity of the first isolation structure is greater than or equal to 10% and less than or equal to 40%, such as 10%, 20%, 30% or 40%.

[0109] It is understandable that the thickness of the second isolation structure 300 and the first isolation structure 200 may be the same or different.

[0110] For example, when the second isolation structure 300 has the same thickness as 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 away from the substrate 100, and compare the in-plane reflectivity to obtain the position of the alignment mark area S1, and then obtain the edge position of the display area AA.

[0111] Optionally, the thickness of the first isolation structure 200 is different from the thickness of the second isolation structure 300. For example, when the thickness of the first isolation structure 200 is greater than the thickness of the second isolation structure 300, the probe of the optical charge-coupled device captures the reflectivity of the plane containing the surface of the second isolation structure 300 away from the substrate 100 (understandably, the reflectivity of the first isolation structure 200 in this plane is 0), and compares the reflectivity in the plane to obtain the position of the alignment mark area S1, and thus the edge position of the display area AA; or, for example, when the thickness of the first isolation structure 200 is greater than the thickness of the second isolation structure 300, the probe of the optical charge-coupled device captures the reflectivity of the plane containing the surface of the first isolation structure 200 away from the substrate 100 (understandably, the reflectivity of the second isolation structure 300 in this plane is 0), and compares the reflectivity in the plane to obtain the position of the alignment mark area S1, and thus the edge position of the display area AA.

[0112] In one embodiment, refer to Figure 1The first isolation structure 200 includes a first portion 201 and a second portion 202 stacked together. The first portion 201 is located on the side of the second portion 202 facing away from the substrate 100, and the orthographic projection of the second portion 202 onto the substrate 100 is within the orthographic projection range of the first portion 201 onto the substrate 100. For example, the second portion 202 can be designed as an independent film layer, meaning there is no physical interface within the second portion 202, and all parts are made of the same material, for example, aluminum. Alternatively, the second portion 202 can be designed as being composed of at least two stacked film layers. For example, the second portion 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. For example, the second portion 202 includes a conductive sub-part, or the second portion 202 itself is a conductive structure. The second part 202 overlaps with the first electrode layer 410 of the light-emitting device 400, so that the first electrode layers 410 of adjacent light-emitting devices 400 are electrically connected to each other, thereby realizing a full-surface cathode. The material of the first part 201 can be an organic material, an inorganic material, or a metallic material. When the first part 201 is a metallic material, the material of the first part 201 can be titanium.

[0113] Optionally, the second isolation structure 300 includes a third part 301 and a fourth part 302 stacked together. 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 that of the first part 201.

[0114] For example, 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.

[0115] For example, the first isolation structure 200 and the second isolation structure 300 can be prepared using the same manufacturing process and the same materials. Exemplarily, the first part 201 and the third part 301 are disposed on the same layer, and the second part 202 and the fourth part 302 are disposed on the same layer. Exemplarily, the reflectivity of the third part 301 is greater than that of the first part 201. In this case, when aligning the display module, the probe of the optical charge-coupled device captures the reflectivity of the plane containing the surfaces of the first part 201 and the third part 301 that are away from the substrate 100. The difference in reflectivity between the first part 201 and the third part 301 facilitates the determination of the boundary of the display area AA.

[0116] In one embodiment, refer to Figure 6 The first isolation structure 200 also includes a fifth part 203, 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 range of the fifth part 203 on the substrate 100.

[0117] Optionally, the third part 301 is disposed on the same layer as the second part 202, and the fourth part 302 is disposed on the same layer as the fifth part 203. For example, the orthographic projection of the third part 301 on the substrate 100 is located within the orthographic projection range of the fourth part 302 on the substrate 100.

[0118] For example, the material of the third part 301 is the same as the material of the second part 202, and the material of the fourth part 302 is the same as the material 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. In this case, 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 that of the second isolation structure 300.

[0119] It should be noted that the reflectivity in this article refers to the reflectivity of the film layer away from the surface of 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 third part 301 away from the surface of the substrate 100.

[0120] It should be noted that the thickness mentioned in this article refers to the thickness in the direction perpendicular to the plane of the substrate 100. 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 of the substrate 100.

[0121] In one embodiment, refer to Figure 7 The schematic diagram of the cross-sectional structure of the display module shown shows that the second isolation structure 300 also includes a sixth part 303, which is located on the side of the fourth part 302 near 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.

[0122] Optionally, the first part 201 and the third part 301 are arranged in the same layer, the second part 202 and the fourth part 302 are arranged in the same layer, and the fifth part 203 and the sixth part 303 are arranged in the same layer. Thus, the first isolation structure 200 and the second isolation structure 300 can be prepared through the same fabrication process. In this case, 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.

[0123] In one embodiment, refer to Figure 8The schematic diagram of the cross-sectional structure of the display module shown shows that the first isolation structure 200 includes a first part 201 and a second part 202 stacked together. 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 range of 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 together. 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 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 disposed on the same layer, and the second part 202 and the fourth part 302 are disposed on the same layer. The reflectivity of the seventh part 304 is different from that 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. For example, 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 captures the reflectivity of the plane on which the surface of the seventh part 304 faces away from the substrate 100. At this time, the reflectivity at the plane corresponding to the first part 201 is 0, which helps to determine the boundary of the display area AA; as another example, when aligning the display module, the probe of the optical charge-coupled device captures the reflectivity of the plane on which the surface of the first part 201 faces away from the substrate 100. At this time, the reflectivity at the plane corresponding to the third part 301 is 0, which helps to determine the boundary of the display area AA.

[0124] For example, the material of Part 7 304 includes aluminum, while the material of Part 1 201 includes titanium.

[0125] Optionally, the second isolation opening 310 includes a first sub-isolation opening 311, which is adjacent to the edge of the display area AA and arranged circumferentially along the edge of the display area AA. For example, refer 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, in which case the probe of the optical charge-coupled device has a better grasping effect on the second isolation structure 300 and a better ability to identify the boundary of the display area AA.

[0126] For example, the orthographic projection of the first sub-isolation opening 311 on the substrate 100 lies on the same straight line as the edge of the display area AA. Therefore, when the probe of the optical charge-coupled device (OCD) detects the edge of the first sub-isolation opening 311 located on the same straight line, it is easier to determine the boundary of the display area AA. For example, the distance between the edge of the orthographic projection of the first sub-isolation opening 311 on the substrate 100 and the display area AA is a preset distance. After the probe of the OCD detects the edge of the first sub-isolation opening 311 located on the same straight line, the boundary of the display area AA can be obtained by calculating the position of the straight line and the preset distance.

[0127] For example, the isolation structure between adjacent first isolation opening 210 and second isolation opening 310 is the first isolation structure 200.

[0128] In one embodiment, refer to Figure 1 The display module also includes a first redundant light-emitting device 500, at least a portion of which 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.

[0129] For example, the first redundant light-emitting device 500 and the light-emitting device 400 are prepared by the same fabrication process.

[0130] 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 sequentially. The first conductive layer 510 is located between the second isolation structure 300 and the substrate 100, and at least a portion 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 overlaps 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 trace lines (TP trace lines) in the substrate 100.

[0131] For example, the second light-emitting functional layer 520 is disposed in the same layer as the first light-emitting functional layer 420, the first conductive layer 510 is disposed in the same layer as the first electrode layer 410, and the second conductive layer 530 is disposed in the same layer as the second electrode layer 430.

[0132] In one embodiment, refer to Figure 4 The display module also includes a non-alignment identifier area S2, which is located at least part of the periphery of the display area AA. For example, in the border area NA, the area other than the alignment identifier area S1 can be the non-alignment identifier area S2.

[0133] Optionally, refer to Figure 9 The schematic diagram of the cross-sectional structure of the display module shown shows that the display module also includes a third isolation structure 600, located in the non-alignment marking area S2. The third isolation structure 600 is set on the same layer as the first isolation structure 200.

[0134] Optionally, the third isolation structure 600 encloses a plurality of third isolation openings 610. The display module also includes a second redundant light-emitting device 700, at least a portion of which is located within the third isolation openings 610 and 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, with the fourth conductive layer 730 overlapping with the third isolation structure 600. Thus, the third isolation structure 600 is conductive, and after overlapping with the fourth conductive layer 730, it can act as a shielding layer to prevent interference between the gate drive signal line (GiP signal line) and the touch trace 800 (TP trace line) in the substrate 100.

[0135] Optionally, the second 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 second redundant light-emitting device 700 can be fabricated using the same fabrication process.

[0136] 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.

[0137] For example, the isolation structure between adjacent second isolation openings 310 and third isolation openings 610 is a second isolation structure 300 or a third isolation structure 600.

[0138] For example, the display module may further include a pixel defining layer 1000 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 encloses 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 onto the substrate 100 is located within the orthographic projection range of the first isolation opening 210 onto the substrate 100. The orthographic projection of the first redundant pixel opening 1200 onto the substrate 100 is located within the first redundant pixel opening 210. The second isolation opening 310 is within the orthographic projection range on the substrate 100; the second redundant pixel opening 1300 is within the orthographic projection range on the substrate 100 of the third isolation opening 610; the first electrode layer 410 is exposed within the connected first isolation opening 210 and pixel opening 1100; the first conductive layer 510 is exposed within the connected first redundant pixel opening 1200 and second isolation opening 310; the third conductive layer 710 is exposed within the connected second redundant pixel opening 1300 and third isolation opening 610.

[0139] Exemplarily, substrate 100 may be a substrate substrate. In some embodiments, the substrate substrate may be a glass substrate. In some embodiments, the substrate substrate may include organic resin materials such as epoxy resin, triazine, silicone resin, or polyimide. For example, the substrate substrate may be an FR4 type printed circuit board (PCB), or it may be a flexible PCB that is easily deformable. In some embodiments, the substrate substrate may include ceramic materials such as silicon nitride, aluminum nitride, or aluminum oxide, or it may include metals or metal compounds. For example, the substrate substrate may be a metal core PCB (MCPCB) or a metal copper clad laminate (MCCL).

[0140] For example, the substrate 100 includes a gate drive signal line (GiP signal line). In the frame area NA, the GiP signal line is prone to interference with the touch traces. In one embodiment of this application, in the frame area NA, the second isolation structure 300 and the first redundant light-emitting device 500 are connected, and the third isolation structure 600 and the second redundant light-emitting device 700 are connected. The entire frame area forms a conductive layer, which helps to avoid interference between the GiP signal line and the touch traces.

[0141] It should be noted that, in this paper, the films with the same layer can be prepared by the same process, or the films with the same layer can be prepared by the same preparation process and using the same materials.

[0142] It should be noted that, Figures 1 to 10 middle, Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10 It can be Figure 4 A schematic diagram of the cross-sectional structure along the AA' direction. Figure 9 It can be Figure 4 A schematic diagram of the cross-sectional structure along the BB' direction.

[0143] Optionally, refer to Figure 11 The diagram shows a cross-sectional structure of the display module, which also includes touch traces 800.

[0144] Optionally, the touch trace 800 is located in the bezel area NA, and the orthographic projection of the touch trace 800 on the substrate 100 overlaps with the orthographic projection of the second isolation structure 300 on the substrate 100 (see details). Figure 12 and Figure 13 (The diagram shows a top view of the display module.) Therefore, the arrangement of the touch trace 800 has a minimal obstruction effect on the second isolation structure 300, which facilitates accurate identification of the alignment marking area S1.

[0145] For example, 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 near the display area AA on the substrate 100.

[0146] Understandably, within the area enclosed by the touch trace 800, the length of the exposed second isolation opening 310 near the edge of the display area AA is sufficient to meet the alignment and gripping length requirements.

[0147] It is understood that an encapsulation layer 10 is provided on the side of the first isolation structure 200 and the second isolation structure 300 facing away from the substrate. The encapsulation layer 10 includes a first encapsulation layer 11, a second encapsulation layer 12, and a third encapsulation layer 13. The first encapsulation layer 11 includes a plurality of encapsulation portions 111, which correspond to the first isolation opening 210 and the second isolation opening 310, and are partially located in the first isolation opening 210 and the second isolation opening 310. It should be noted that the encapsulation layer 10 can be an encapsulation layer in the prior art, which will not be described in detail here.

[0148] In one embodiment, refer to Figure 14 The schematic diagram of the cross-sectional structure of the display module shown shows that the display module also includes: a cover plate 900, located on the side of the touch trace 800 away from the substrate 100, and the orthographic projection of the cover plate 900 on the substrate 100 covers the orthographic projection of the display area AA and the bezel area NA on the substrate 100.

[0149] It is understandable that an optical adhesive layer 50 can be used to flatten the side of the touch trace 800 away from the substrate 100, so as to facilitate the bonding of the cover plate 900.

[0150] Optionally, the cover plate 900 includes an ink area 910 and a transparent area 920. The ink area 910 is correspondingly disposed to the border area NA, and the transparent area 920 is correspondingly disposed to 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.

[0151] Understandably, during alignment, the boundary of the transparent area 920 needs to be aligned with the boundary of the display area AA to achieve a high-precision fit between the cover plate 900 and the display panel.

[0152] It should be noted that the display module in this embodiment can be combined with the display module described above in whole or in part, which will not be elaborated further here.

[0153] It should be noted that, Figure 11 and Figure 14 It can be Figure 12 A schematic diagram of the cross-sectional structure along the CC' direction.

[0154] A second aspect of this application provides a display module, as shown in the reference... Figure 1 The display module includes a display area AA and a alignment mark area S1, with the alignment mark area S1 located on at least a portion of the periphery of the display area AA.

[0155] Optionally, the display module also includes a border area NA, which at least partially surrounds the display area AA, and a alignment marker area S1 is located in the border area NA. Therefore, the setting of the alignment marker area S1 has almost no impact on the display effect of the display module.

[0156] 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.

[0157] 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 some of the light-emitting devices 400 are located in the first isolation openings 210.

[0158] 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 marking area S1. The second isolation structure 300 encloses a plurality of second isolation openings 310. The distance from the side of the second isolation structure 300 away from the substrate 100 to the substrate 100 is different from the distance from the side of the first isolation structure 200 away from the substrate 100 to the substrate. For example, when the distance from the side of the first isolation structure 200 away from the substrate 100 to the substrate is greater than the distance from the side of the second isolation structure 300 away from the substrate 100 to the substrate 100, the probe of the optical charge-coupled device can capture the reflectivity of the plane containing the surface of the second isolation structure 300 away from the substrate 100 (understandably, the reflectivity of the first isolation structure 200 in this plane is 0), and by comparing the reflectivity in the plane, the position of the alignment mark area S1 can be obtained, and thus the edge position of the display area AA can be obtained; or, for example, when the distance from the side of the first isolation structure 200 away from the substrate 100 to the substrate is greater than the distance from the side of the second isolation structure 300 away from the substrate 100 to the substrate, the probe of the optical charge-coupled device can capture the reflectivity of the plane containing the surface of the first isolation structure 200 away from the substrate 100 (understandably, the reflectivity of the second isolation structure 300 in this plane is 0), and by comparing the reflectivity in the plane, the position of the alignment mark area S1 can be obtained, and thus the edge position of the display area AA can be obtained.

[0159] In one embodiment, refer to Figure 6 The first isolation structure 200 includes a first part 201 and a second part 202 stacked together. The first part 201 is located on the side of the second part 202 facing away from the substrate 100, and the orthographic projection of the second part 202 on the substrate 100 is within the range of 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 together. The third part 301 is located on the side of the fourth part 302 facing away from the substrate 100, and 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 disposed on the same layer, and the second part 202 and the fourth part 302 are disposed on the same layer. In this case, the thickness of the second isolation structure 300 is relatively large.

[0160] For example, refer to Figure 10 The schematic diagram of the cross-sectional structure of the display module shown indicates that the second isolation structure 300 includes a fourth part 302, and the second part 202 and the fourth part 302 are disposed on the same layer. In this case, the thickness of the second isolation structure 300 is relatively small.

[0161] In one embodiment, the first isolation structure 200 further includes a fifth portion 203 located on the side of the second portion 202 near the substrate 100, wherein 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 near the substrate 100, wherein 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, and the fifth portion 203 and the sixth portion 303 are disposed on the same layer.

[0162] It should be noted that the display module in this embodiment can be combined with the display module described above in whole or in part, which will not be elaborated further here.

[0163] A third aspect of this application provides a method for manufacturing a display module, referring to... Figure 15 The diagram shows a process flow chart for manufacturing a display module. The manufacturing process for the display module includes the following steps.

[0164] S100: A first electrode layer is prepared on one side of the substrate, in the display area, and a first conductive layer is prepared in the alignment marking area.

[0165] It should be noted that the first electrode layer, display area, first conductive layer, alignment mark area, and substrate are the same as described above, and will not be repeated here.

[0166] S200: A first isolation structure is prepared on the side of the first electrode layer away from the substrate, and a second isolation structure is prepared on the side of the first conductive layer 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.

[0167] The reflectivity of the second isolation structure is different from that of the first isolation structure.

[0168] It should be noted that the first isolation structure and the second isolation structure are consistent with the previous description, and will not be elaborated further here.

[0169] In one embodiment, the step of fabricating a first isolation structure on the side of the first electrode layer away from the substrate and a second isolation structure on the side of the first conductive layer away from the substrate includes: on the side of the first electrode layer 410 away from the substrate 100, a third isolation material layer 23, a second isolation material layer 22, and a first isolation material layer 21 are sequentially fabricated in the display area AA and the border area NA, as detailed below. Figure 16 The first isolation material layer 21 is graphically processed to obtain the first part 201. The first isolation material layer 21 corresponding to the alignment mark area S1 is removed. See the details below. Figure 17The second isolation material layer 22 and the third isolation material layer 23 are graphically processed to obtain the first isolation structure 200 and the second isolation structure 300 (see details). Figure 18 and Figure 6 ).

[0170] It should be noted that, Figure 16 The 20 in the text represents the pixel-defining material layer, which is obtained by creating pixel openings in the pixel-defining material.

[0171] It should be noted that, in Figure 17 In this process, the first isolation material layer 21 is patterned using the first photoresist 30 to obtain the first part 201.

[0172] It should be noted that, in Figure 18 In this process, the second photoresist 40 is used to pattern the second isolation material layer 22 and the third isolation material layer 23.

[0173] S300: A first light-emitting functional layer and a second electrode layer are sequentially fabricated in the first isolation opening to obtain multiple light-emitting devices.

[0174] It should be noted that the light-emitting device is the same as described above, and will not be elaborated further here.

[0175] For example, while fabricating the light-emitting device, a first redundant light-emitting device is fabricated in the second isolation opening, and a second redundant light-emitting device is fabricated in the third isolation opening.

[0176] It should be noted that the display module prepared by the method of this embodiment can be combined with the display module described above in whole or in part, which will not be elaborated further here.

[0177] The fourth aspect of this application provides a method for aligning a display module, referring to... Figure 19 The diagram shows a flowchart of the alignment method for the display module. The alignment method for the display module includes the following steps.

[0178] S400: Obtain a first image of the first surface that is flush with the surface of the second isolation structure that is opposite to the substrate, and obtain a second image of the cover plate.

[0179] Specifically, on the first surface, the reflectivity of the first isolation structure is different from that of the second isolation structure.

[0180] In one embodiment, the first isolation structure includes a first part, a second part, and a third part stacked together, with the first part located on the side of the second part facing away from the substrate; the second isolation structure includes a third part and a fourth part stacked together, with the third part located on the side of the fourth part facing 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; acquiring a first image of the first surface flush with the surface of the second isolation structure facing away from the substrate includes: acquiring an image of a plane flush with the surfaces of the second part and the third part facing away from the substrate. At the first surface, the reflectivity of the second part and the third part is different, and the first part is also provided on the side of the second part facing 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 third part has a higher reflectivity, which facilitates accurate identification of the third part.

[0181] S500: Determine the boundary of the display area or border area based on the first image, and determine the boundary of the ink area based on the second image.

[0182] In one embodiment, the second isolation structure 300 encloses a plurality of second isolation openings 310, each of which includes a first sub-isolation opening 311, which is disposed adjacent to the display area AA.

[0183] Optionally, based on the first image (a schematic diagram of the first image can be referred to...) Figure 20 The steps for determining the boundary of the border area include: determining the edge of the first sub-isolation opening 311 near the display area AA based on the first image; fitting the edge located on the same side of the display area AA as a first straight line L1 in the first direction x; fitting the edge located on the same side of the display area AA as a second straight line L2 in the second direction y; the first direction x intersects the second direction y; and 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.

[0184] It is understandable that when the second isolation opening 310 is made, the first sub-isolation opening 311 has a preset distance between the edge of the display area AA and the boundary of the display area AA. After the first straight line L1 and the second straight line L2 are identified, the positions of the first straight line L1 and the second straight line L2 are calculated with the preset distance to obtain the boundary position of the display area AA.

[0185] Similarly, since the reflectivity of the ink area and the transparent area of ​​the cover plate differs, the boundary of the ink area of ​​the cover plate can be obtained using conventional methods. It should be noted that the boundary of the ink area of ​​the cover plate here refers to the boundary of the ink area near the transparent area.

[0186] S600: Aligns the cover plate with the display panel based on the boundary of the display area or bezel area and the boundary of the ink area.

[0187] It should be noted that the display module in this embodiment can be combined with the display module described above in whole or in part, which will not be elaborated further here.

[0188] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0189] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display module, characterized in that, The display module includes a display area and a alignment mark area, wherein the alignment mark area is located on at least a portion of the periphery of the display area; The display module includes: substrate; A first isolation structure is located on one side of the substrate and in the display area, and the first isolation structure encloses a plurality of first isolation openings; The second isolation structure is located on the same side of the substrate as the first isolation structure and is located in the alignment marking area. 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. Multiple light-emitting devices, at least some of which are located in the first isolation opening.

2. The display module according to claim 1, characterized in that, The reflectivity of the second isolation structure is greater than that of the first isolation structure; And / or, the thickness of the first isolation structure is different from the thickness of the second isolation structure.

3. The display module according to claim 2, characterized in that, The ratio of the reflectivity of the second isolation structure to the reflectivity of the first isolation structure is 2 to 10.

4. The display module according to claim 2 or 3, characterized in that, 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%.

5. The display module according to claim 1, characterized in that, The first isolation structure includes a first part and a second part stacked together, 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 range of the first part on the substrate; The second isolation structure includes a third part and a fourth part stacked together. 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 reflectivity of the third part is different from that of the first part.

6. The display module according to claim 5, characterized in that, The reflectivity of the third part is greater than that of the first part.

7. The display module according to claim 5 or 6, characterized in that, The first part is arranged on the same layer as the third part, and the second part is arranged on the same layer as the fourth part.

8. The display module according to claim 5, characterized in that, The first isolation structure further includes a fifth part located on the side of the second part close to the substrate, wherein the orthographic projection of the second part on the substrate is within the orthographic projection range of the fifth part on the substrate.

9. The display module according to claim 8, characterized in that, 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.

10. The display module according to claim 9, characterized in that, The material of the third part includes aluminum, and the material of the first part includes titanium.

11. The display module according to claim 8 or 9, characterized in that, The third part is arranged on the same layer as the second part, and the fourth part is arranged on the same layer as the fifth part.

12. The display module according to claim 8, 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 is within the orthographic projection range of the sixth part on 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.

13. The display module according to claim 12, characterized in that, The first part is arranged on the same layer as the third part, the second part is arranged on the same layer as the fourth part, and the fifth part is arranged on the same layer as the sixth part.

14. The display module according to claim 1, characterized in that, The first isolation structure includes a first part and a second part stacked together, 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 range of the first part on the substrate; The second isolation structure includes a seventh part, a third part, and a fourth part stacked together. 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 disposed on the same layer. The second part and the fourth part are disposed on the same layer. The reflectivity of the seventh part is different from that of the first part.

15. The display module according to claim 14, characterized in that, The reflectivity of the seventh part is greater than that of the first part.

16. The display module according to claim 1, characterized in that, The display module further includes a border area, which at least partially surrounds the display area, and the alignment mark area is located in the border area.

17. The display module according to claim 16, characterized in that, In a first direction, the alignment marking area is located on at least one side of the display area; in a second direction, the alignment marking area is located on at least one side of the display area; the first direction intersects with the second direction.

18. The display module according to claim 16 or 17, characterized in that, The second isolation opening includes a first sub-isolation opening, which is adjacent to the edge of the display area and arranged circumferentially along the edge of the display area.

19. The display module according to claim 18, characterized in that, The orthographic projection of the first sub-isolation opening on the substrate is on the same straight line as the edge of the display area.

20. The display module according to claim 1, characterized in that, The display module further includes a first redundant light-emitting device, at least a portion of which is located in the second isolation opening.

21. The display module according to claim 20, characterized in that, The first redundant light-emitting device is arranged on the same layer as the light-emitting device.

22. The display module according to claim 20 or 21, characterized in that, The light-emitting device includes a first electrode layer, a first light-emitting functional layer, and a second electrode layer stacked sequentially. The first electrode layer is located between the first isolation structure and the substrate, and at least a portion of the first electrode layer is exposed through the first isolation opening. The first light-emitting functional layer and the second electrode layer are located within 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 sequentially. The first conductive layer is located between the second isolation structure and the substrate, and at least a portion 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 disposed in the same layer as the first light-emitting functional layer, the first conductive layer is disposed in the same layer as the first electrode layer, and the second conductive layer is disposed in the same layer as the second electrode layer.

23. The display module according to claim 1, characterized in that, The display module further includes a non-alignment marking area, which is located on at least a portion of the periphery of the display area; The display module also includes a third isolation structure located in the non-alignment marking area, and the third isolation structure is disposed on the same layer as the first isolation structure.

24. The display module according to claim 23, characterized in that, The display module further includes a border area, which at least partially surrounds the display area, and the non-aligned marking area is located in the border area.

25. The display module according to claim 23 or 24, characterized in that, 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 a portion of which is located in the third isolation opening and overlaps with the third isolation structure.

26. The display module according to claim 25, characterized in that, The second redundant light-emitting device is arranged on the same layer as the light-emitting device.

27. The display module according to claim 23, characterized in that, The second isolation structure is electrically connected to the third isolation structure.

28. The display module according to claim 1, characterized in that, The display module further includes a border area, which at least partially surrounds the display area, and the alignment mark area is located in the border area; The display module further includes: a touch trace located in the bezel area, wherein the orthographic projection of the touch trace on the substrate overlaps with the orthographic projection of the second isolation structure on the substrate.

29. The display module according to claim 28, characterized in that, The second isolation opening includes a first sub-isolation opening, which is adjacent to the display area. The orthographic projection of the touch trace on the substrate and the orthographic projection of a portion of the edge of the first sub-isolation opening near the display area on the substrate are spaced apart.

30. The display module according to claim 29, characterized in that, The display module further includes a border area, which is located on at least a portion of the periphery 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 trace away from the substrate, wherein the orthographic projection of the cover plate on the substrate covers the orthographic projection of the display area and the border area on the substrate.

31. The display module according to claim 30, characterized in that, The cover plate includes an ink area and a transparent area, the ink area being configured corresponding to the border area, and the transparent area being configured corresponding to the display area.

32. A display module, characterized in that, The display module includes a display area and a alignment mark area, wherein the alignment mark area is located on at least a portion of the periphery of the display area; The display module includes: substrate; A first isolation structure is located on one side of the substrate and in the display area, and the first isolation structure encloses a plurality of first isolation openings; The second isolation structure is located on the same side of the substrate as the first isolation structure and is located in the alignment marking area. 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. The reflectivity of the second isolation structure is different from the reflectivity of the first isolation structure. Multiple light-emitting devices, at least some of which are located in the first isolation opening.

33. The display module according to claim 32, characterized in that, The first isolation structure includes a first part and a second part stacked together, 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 range of the first part on the substrate; The second isolation structure includes a seventh part, a third part, and a fourth part stacked together. 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 disposed on the same layer; and the second part and the fourth part are disposed on the same layer. or, The second isolation structure includes a fourth part, which is disposed on the same layer as the second part.

34. The display module according to claim 33, characterized in that, The first isolation structure further includes a fifth part located on the side of the second part closer to the substrate, wherein 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. The orthographic projection of the fourth part on the substrate is within the orthographic projection range of the sixth part on the substrate. The fifth part is disposed on the same layer as the sixth part.

35. A method for manufacturing 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 marking area; A first isolation structure is formed on the side of the first electrode layer that is away from the substrate, and a second isolation structure is formed on the side of the first conductive layer that is 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 that of the first isolation structure; A first light-emitting functional layer and a second electrode layer are sequentially fabricated in the first isolation opening to obtain multiple light-emitting devices.

36. The preparation method according to claim 35, characterized in that, The steps of fabricating a first isolation structure on the side of the first electrode layer opposite to the substrate and fabricating a second isolation structure on the side of the first conductive layer opposite to 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 graphically processed to obtain the first part, and the first isolation material layer corresponding to the alignment mark area is removed; The second and third isolation material layers are graphically processed to obtain the first isolation structure and the second isolation structure.

Images