Display substrate, display device, and method for manufacturing display substrate

Abstract

The present invention discloses a display substrate, a display device, and a method for manufacturing a display substrate, wherein the display substrate comprises: a base substrate; an anode layer disposed on one side of the base substrate; a common layer disposed on a side of the anode layer away from the base substrate; an isolation opening disposed on the common layer; a light-emitting layer disposed on a side of the common layer away from the anode layer, the light-emitting layer comprising at least a red light-emitting unit and a green light-emitting unit; wherein the orthographic projection of the isolation opening on the base substrate is located between the orthographic projection of the red light-emitting unit and the orthographic projection of the green light-emitting unit on the base substrate; and a cathode layer disposed on a side of the light-emitting layer away from the anode layer. The present invention can effectively reduce or avoid current crosstalk between red and green sub-pixels, thereby improving the color quality of green images displayed at low brightness and low grayscale.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display substrate, a display device, and a method for manufacturing the display substrate. Background Art

[0002] As OLED (Organic Light-Emitting Diode) resolution requirements continue to increase, the spacing between pixels is shrinking. Consequently, crosstalk between pixels is highly susceptible to occur. This is especially true at low brightness and grayscale levels, where controlling the green sub-pixel to illuminate may also cause the red sub-pixel to illuminate, resulting in abnormal lighting.

[0003] Therefore, how to reduce the current crosstalk between the red sub-pixel and the green sub-pixel is an urgent problem to be solved. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a display substrate, a display device and a method for manufacturing a display substrate, which can effectively reduce or avoid the current crosstalk phenomenon between red sub-pixels and green sub-pixels, and improve the color quality of green images displayed under low brightness and low grayscale.

[0005] In the first aspect, the present application provides the following technical solutions through an embodiment:

[0006] A display substrate comprises: a base substrate; an anode layer, arranged on one side of the base substrate; a common layer, arranged on a side of the anode layer away from the base substrate; an isolation opening portion is provided on the common layer; a light-emitting layer, arranged on a side of the common layer away from the anode layer, the light-emitting layer comprising at least a red light-emitting unit and a green light-emitting unit; wherein the orthographic projection of the isolation opening portion on the base substrate is located between the orthographic projection of the red light-emitting unit on the base substrate and the orthographic projection of the green light-emitting unit on the base substrate; and a cathode layer, arranged on a side of the light-emitting layer away from the anode layer.

[0007] Optionally, the common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along the direction of the line connecting the red and green light-emitting units, the first width of the isolation opening is less than or equal to the width of the spacing area; the direction of the line connecting the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit.

[0008] Optionally, the common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along a direction perpendicular to the line connecting the red and green light-emitting units, the second width of the isolation opening portion is greater than or equal to the width of the red light-emitting unit; the direction of the line connecting the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit.

[0009] Optionally, a pixel definition layer is further included; the pixel definition layer is arranged on a side of the base substrate close to the anode layer; the pixel definition layer is used to define different light-emitting units in the light-emitting layer.

[0010] Optionally, the common layer includes a hole transport layer; and the isolation opening is provided on the hole transport layer.

[0011] In the second aspect, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0012] A display device comprises the display substrate described in any one of the first aspects above.

[0013] In the third aspect, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0014] A method for manufacturing a display substrate, comprising:

[0015] A base substrate is provided; an anode layer is formed on one side of the base substrate; a common layer having an isolation opening portion is formed on a side of the anode layer away from the base substrate; a light-emitting layer is formed on a side of the common layer away from the base substrate; the light-emitting layer includes at least a red light-emitting unit and a green light-emitting unit, and the orthographic projection of the isolation opening portion on the base substrate is located between the orthographic projection of the red light-emitting unit on the base substrate and the orthographic projection of the green light-emitting unit on the base substrate; and a cathode layer is formed on a side of the light-emitting layer away from the base substrate.

[0016] Optionally, the base substrate includes a first region corresponding to a red light-emitting unit and a second region corresponding to a green light-emitting unit, and the common layer includes a first common layer and a second common layer; and forming a common layer having an isolation opening on a side of the anode layer away from the base substrate includes:

[0017] A first mask is used to block the first area to form a first common layer on the side of the base substrate having the anode layer; a second mask is used to block the second area to form a second common layer on the side of the base substrate having the anode layer; wherein the areas blocked by the first mask and the second mask have an overlapping area, and the overlapping area forms the isolation opening portion.

[0018] Optionally, the common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along the direction of the line connecting the red and green light-emitting units, the first width of the overlapping area is less than or equal to the first width of the spacing area; the direction of the line connecting the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit.

[0019] Optionally, the common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along a direction perpendicular to the line connecting the red and green light-emitting units, the second width of the overlapping area is greater than or equal to the second width of the spacing area; the direction of the line connecting the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit.

[0020] A display device, a display substrate, and a manufacturing method thereof are provided in an embodiment of the present invention, wherein the display substrate is provided with an isolation opening portion on a common layer, and the orthographic projection of the isolation opening portion on the base substrate is located between the orthographic projection of the red light-emitting unit on the base substrate and the orthographic projection of the green light-emitting unit on the base substrate. When the green light-emitting unit needs to be illuminated, the leakage current between the green light-emitting unit and the red light-emitting unit can be effectively isolated or weakened by the isolation opening portion, thereby reducing or avoiding the problem of abnormal lighting of the red sub-pixel, and improving the color quality of the green picture displayed at low brightness and low grayscale.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram showing an abnormal peak in the color coordinates of a red sub-pixel when the green sub-pixel is lit;

[0024] Figure 2 Schematic diagram of the equivalent circuit between the green sub-pixel and the red sub-pixel;

[0025] Figure 3 A schematic diagram of the structure of the common layer connection between the green sub-pixel and the red sub-pixel;

[0026] Figure 4 is a schematic structural diagram of a display substrate in the present invention;

[0027] Figure 5 and Figure 6 A schematic diagram of the structure size of the isolation opening;

[0028] Figure 7 Schematic diagram of the positional relationship of sub-pixels in the Pentile arrangement of the present invention;

[0029] Figure 8 A schematic diagram of a structure for shielding a first area in an implementation of the present invention;

[0030] Figure 9 for Figure 8 A schematic structural diagram of the corresponding first common layer;

[0031] Figure 10 A schematic diagram of a structure for shielding the second area in an implementation of the present invention;

[0032] Figure 11 for Figure 10 a schematic structural diagram of a correspondingly formed second common layer;

[0033] Figure 12 This is a schematic diagram of a structure for shielding the first area in another implementation of the present invention;

[0034] Figure 13 It is a structural schematic diagram of shielding the second area in another implementation of the present invention. DETAILED DESCRIPTION

[0035] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0036] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments of the present disclosure. These figures are not drawn to scale, and for the purpose of clarity, certain details are exaggerated and certain details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0037] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, it can be directly on the other layer / element or an intervening layer / element may be present therebetween. In addition, if a layer / element is "on" another layer / element in one orientation, it may be "below" the other layer / element when the orientation is reversed.

[0038] By analyzing that when the pixel distance is close and only the green sub-pixel is lit under low brightness and low grayscale conditions, the red sub-pixel will also be abnormally lit, causing abnormal color coordinates; after testing, the color coordinates at this time can be seen Figure 1 As shown in the figure, it can be seen that when the green sub-pixel is lit, a peak A is formed, and a significant peak B also appears at the corresponding position of the red sub-pixel, causing abnormal lighting. Figure 2 ,Through equivalent circuit analysis, it is found that when the green sub-pixel is lit, leakage will occur between the lit green sub-pixel and its adjacent red sub-pixel, that is, Figure 2 When the current Ia that lights up the green sub-pixel is generated, a leakage current Ib that flows to the red sub-pixel is also generated.

[0039] It is further discovered that in order to reduce the use of FMM (Fine Metal Mask, high-precision metal mask) in the current commonly used OLED process to reduce costs, a common mask is used when manufacturing some common layers. During the manufacturing process, a common layer is formed, such as a hole transport layer. Figure 3 As shown (this is only an example, some functional layers are not shown). Figure 3 The figure shows an anode layer 11, a pixel definition layer 12 located on one side of the anode layer 11, and a red light-emitting layer 13 and a green light-emitting layer 14 located in the opening area of ​​the pixel definition layer 12. There is also a common layer 15 between the light-emitting material and the anode layer 11 (or pixel definition layer 12), and the common layer 15 at position C between the red sub-pixel and the green sub-pixel is connected; that is, the leakage current can flow from the green sub-pixel side through the common layer 15 to the red sub-pixel side. Since the lighting voltage of the red sub-pixel is lower, the red sub-pixel will be abnormally lit. Therefore, the red sub-pixel that is lit under low brightness and low grayscale conditions will cause a more obvious color cast on the screen. For example, the green screen will appear reddish.

[0040] In response to the above situation, some embodiments of the present invention provide a display substrate, a display device, and a method for manufacturing a display substrate. The method or device in the embodiment of the present invention can extend the leakage current path between the green light-emitting unit and the red light-emitting unit, or form an open circuit between the green light-emitting unit and the red light-emitting unit by providing an isolation opening on the common layer between the green light-emitting unit and the red light-emitting unit in the light-emitting layer. This weakens or avoids the leakage current crosstalk generated between the green light-emitting unit and the red light-emitting unit when the green light-emitting unit is illuminated, effectively reducing or avoiding the problem of abnormal lighting of the red sub-pixel. The overall concept of the present invention is further elaborated and illustrated below through some specific implementation methods.

[0041] See also Figure 4 In one embodiment of the present invention, a display substrate 200 is provided, which includes: a base substrate, an anode layer (Anode) 21, a pixel definition layer (Pixel definition layer, PDL) 22, a common layer 2323, an emission layer (Emission layer, EML) 24 and a cathode layer (Cathode) 25.

[0042] The base substrate 20 can be implemented as a TFT (Thin Film Transistor) driver substrate. This TFT driver substrate is provided with a driver circuit for driving each light-emitting unit in the display substrate. The structural implementation of this TFT driver substrate can be specifically referred to in the prior art and will not be described in detail in this embodiment. Of course, other substrates may also be used in some embodiments.

[0043] An anode layer 21 is disposed on one side of the base substrate 20. The anode layer 21 can be made of anode metal or other anode materials. The anode layer 21 is a patterned anode layer 21. It is understood that the anode layer 21 includes multiple anodes, each of which corresponds to a pixel light-emitting unit of the light-emitting layer 24.

[0044] A pixel definition layer 22 can also be disposed on the anode layer 21; this pixel definition layer 22 is used to define the red, green, and blue sub-pixels. As will be appreciated, this pixel definition layer 22 is disposed on the side of the anode layer 21 near the cathode layer 25 and is provided with a plurality of pixel openings. Each pixel opening corresponds to a sub-pixel, and at least a portion of each anode corresponds to a pixel opening, meaning that each anode corresponds to a sub-pixel.

[0045] The common layer 23 is disposed on the side of the pixel definition layer 22 away from the anode layer 21. Specifically, the common layer 23 may include a hole transport layer (HTL) and, in some implementations, a hole injection layer (HIL). This embodiment primarily uses the hole transport layer as an example. An isolation opening 231 is provided on the common layer 23 to block leakage current between sub-pixels.

[0046] The light-emitting layer 24 is provided on the side of the common layer 23 away from the anode layer 21. The light-emitting layer 24 includes at least a red light-emitting unit and a green light-emitting unit, and may also include a blue light-emitting unit. It can be understood that the red light-emitting unit corresponds to the red sub-pixel, the green light-emitting unit corresponds to the green sub-pixel, and the blue light-emitting unit corresponds to the blue sub-pixel. The orthographic projection of the isolation opening 231 on the substrate 20 is located between the orthographic projection of the red light-emitting unit and the orthographic projection of the green light-emitting unit on the substrate, as shown in FIG. Figure 4 As shown, the leakage current between the green light-emitting unit and the red light-emitting unit when the green light-emitting unit is lit can be weakened or eliminated, thereby weakening or eliminating the problem of display color difference caused by abnormal lighting of the red light-emitting unit in low brightness and low grayscale states.

[0047] Furthermore, in this embodiment, an opening portion is provided between the red light-emitting unit and the green light-emitting unit, rather than providing completely isolated gaps between each of the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit. This implementation structure can be manufactured without using FMM during the process, which can effectively control costs. The specific manufacturing method is described in the subsequent embodiments. In addition, since the isolation opening portion 231 in the present application is provided between the green light-emitting unit and the red light-emitting unit, when a mask is used, the problem of applicability of the openings between different pixels can be effectively avoided. For example, in the case of a device with a Pentile arrangement, the mask can be manufactured with the annular area surrounded by four adjacent green pixels as vertices as a unit, thereby avoiding adaptation for each pixel light-emitting unit.

[0048] In some implementations, such as Figure 5As shown, a spacing region is provided in the common layer between the red and green light-emitting units. Along the line connecting the red and green light-emitting units (e.g., direction D1 in FIG5 ), the first width (W1) of the isolation opening 231 is less than or equal to the first width (W2) of the spacing region. The red and green light-emitting unit line is defined as the direction of the line connecting the centers of the red and adjacent green light-emitting units. As will be appreciated, the isolation opening 231 is located between the two pixel openings in the pixel definition layer 22. This ensures that both the red and green light-emitting units have sufficient hole transport layers, thus preventing degradation of the pixel light-emitting unit's performance.

[0049] In some implementations, see Figure 6 , along the direction perpendicular to the line connecting the red and green light-emitting units (such as Figure 6 In the direction D2 in FIG, the second width (W11) of the isolation opening 231 is greater than or equal to the width (W12) of the red light-emitting unit. This means that even if leakage current is generated when the green light-emitting unit is illuminated, the distance the leakage current travels through the hole transport layer to the red light-emitting unit is increased, thereby effectively reducing or eliminating the adverse effects of the leakage current and improving the quality of green light.

[0050] The cathode layer 25 is disposed on the side of the light-emitting layer 24 away from the anode layer 21. In some implementations, a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL) may be disposed sequentially between the light-emitting layer 24 and the cathode layer 25, from the anode layer 21 side to the cathode layer 25 side, without limitation. It should be noted that the transparency of the anode layer 21 and the cathode layer 25 can be determined based on whether the device being manufactured is a top-emitting or bottom-emitting device.

[0051] Therefore, in a display substrate 200 provided in this embodiment, an isolation opening portion 231 is provided on the common layer 23, and the isolation opening portion 231 is provided between the red light-emitting unit and the green light-emitting unit. When the green light-emitting unit needs to be lit, the leakage current between the green light-emitting unit and the red light-emitting unit can be effectively isolated or weakened by the isolation opening portion 231, thereby weakening or avoiding the problem of abnormal lighting of the red sub-pixel, and improving the color quality of the green picture displayed under low brightness and low grayscale.

[0052] Based on the same inventive concept, another embodiment of the present invention provides a display device comprising the display substrate described in any of the aforementioned embodiments. The display device can be a display panel, i.e., a small display panel cut from a large display panel. Alternatively, the display device can be a desktop computer monitor, a laptop computer, a tablet computer, a portable display, or the like.

[0053] When the display device is a display panel, it is understood that the display panel may further include an encapsulation layer. The encapsulation layer may be disposed on a side of the display substrate away from the anode layer. The encapsulation layer may be implemented using thin film encapsulation (TFE). Furthermore, other structures of the display panel not described herein, such as the touch layer, may be implemented with reference to existing technologies and will not be further described here.

[0054] Based on the same inventive concept, another embodiment of the present invention provides a method for manufacturing a display substrate, which can be used to manufacture the display substrate described in the above embodiment.

[0055] In some implementations, a base substrate may be provided. This base substrate may be implemented as the TFT driver substrate described in the aforementioned embodiments, or a separate base substrate may be used, without limitation. Next, an anode layer is formed on one side of the base substrate. The anode layer is a patterned structure comprising multiple anodes, each of which may correspond to a subpixel or a light-emitting unit of a light-emitting layer to be formed in a subsequent process. Next, a pixel definition layer is formed on the side of the anode layer facing away from the base substrate. Each pixel opening in the pixel definition layer corresponds to at least a portion of an anode. In other words, the area of ​​the anode formed may be larger than the area of ​​the bottom of the pixel opening near the anode. Next, a common layer having an isolation opening is formed on the side of the pixel definition layer facing away from the base substrate. This common layer partially covers the side of the anode layer facing away from the base substrate. Next, a light-emitting layer is formed on the side of the common layer facing away from the base substrate. The light-emitting layer includes at least a red light-emitting unit and a green light-emitting unit, and may also include a blue light-emitting unit, each of which may correspond to a subpixel. The orthographic projection of the isolation opening on the base substrate is positioned between the orthographic projections of the red light-emitting unit and the green light-emitting unit on the base substrate.

[0056] For ease of explanation, in this embodiment, the area corresponding to the red light-emitting unit on the substrate is referred to as the first area, and the area corresponding to the green light-emitting unit on the substrate is referred to as the second area. To form the isolation openings in the common layer and avoid the use of FMM, this embodiment divides the common layer into two parts: the first common layer is fabricated first, followed by the second common layer.

[0057] like Figure 7 As shown, taking the Pentile arrangement type as an example, Figure 7 : shows the positional relationship of each sub-pixel, which does not represent the area size of each sub-pixel. Figure 7 In the figure, there are red sub-pixel R, green sub-pixel G and blue sub-pixel B. The process is as follows:

[0058] See also Figures 8 to 11 First, a first mask 41 may be used to block a first region to form a first common layer 51 on the side of the substrate having the anode layer, as shown in FIG. Figure 9 Then, the second mask 42 is used to block the second area, as shown in FIG. Figure 10 As shown, a second common layer 52 is formed on the side of the substrate having the anode layer, as shown Figure 11 As shown, the areas blocked by the first mask 41 and the second mask 42 overlap, forming an isolation opening 61. That is, when blocking the first area, there are multiple blocked areas, and when blocking the second area, there are also multiple blocked areas. The multiple blocked areas are located between the first area and the second area, thus forming an overlapping area. Since the overlapping area is blocked twice, no common layer is formed.

[0059] It is understood that the first and second reticles can be identical. When designing the first and second reticles, the masking portion of the reticle can correspond to a circular area defined by the vertices of the four adjacent green light-emitting units, with the remaining areas being openings. When using the second reticle to mask the second area, the first reticle can be shifted relative to the original position. For example, the direction of the shift can be the direction of the line connecting two diagonally opposite green light-emitting units of the corresponding four green light-emitting units, and the distance of the shift can be half or an odd multiple of the distance between the centers of the two diagonally opposite green light-emitting units. After the shift, the two masking positions have an overlapping area, known as an overlap. After the common layer is deposited, this overlap can form an isolated opening. For example, both can be manufactured as the aforementioned second reticle 42. In this implementation, an isolated opening can also be formed between the blue and green light-emitting units. This implementation reduces the number of reticles used, allowing the manufacturing process to be completed using only one identical reticle, effectively controlling costs.

[0060] In addition, the first mask and the second mask may be different. For example, the shielding portion in the first mask corresponds to the annular area surrounded by the four adjacent green light-emitting units as vertices. The annular area can be understood as a roughly square area, and the other areas are opening areas. Figure 12 and Figure 13 ;exist Figure 12In the example, the shielding portion of the first mask 71 can shield the first area. The side length of the shielding portion of the first mask 71 is the distance between two adjacent green light-emitting units. When designing the second mask 72, the size of its opening area can be designed to be the same as or smaller than the shielding portion of the first mask 71; the other part is the shielding portion, which can be used to shield the second area, such as Figure 13 As shown. Taking the orientation of the shielding portion (roughly square) of the first mask 71 as a reference, the orientation of the opening area of ​​the second mask 72 is 45° relative to the orientation of the shielding portion of the first mask 71. Furthermore, if the opening area of ​​the second mask 72 is set smaller, the diagonal length of the opening area can be controlled to be no less than the distance between two adjacent green light-emitting units, preventing the positions corresponding to the blue light-emitting units from forming an effective common layer.

[0061] Furthermore, the size of the overlapping area formed when the first and second mask plates are used for blocking can be controlled. In some implementations, the common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along the direction of the red and green light-emitting units, the first width of the overlapping area is less than or equal to the width of the spacing area; the direction of the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit. In this way, it is possible to ensure that the isolation opening is controlled at a position between the two pixel openings of the pixel definition layer as much as possible to avoid affecting the performance of the device. In other implementations, along the direction perpendicular to the red and green light-emitting units, the second width of the overlapping area is greater than or equal to the width of the red light-emitting unit; the direction of the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit. In this way, the isolation effectiveness of the isolation opening can be ensured as much as possible.

[0062] Finally, a cathode layer and other functional layers are formed on the side of the light-emitting layer away from the base substrate to complete the manufacture of the above-mentioned display substrate.

[0063] It should be noted that the structure formed in each step of the display substrate manufacturing method provided in this embodiment can refer to the aforementioned structural embodiments. The beneficial effects produced have been described in the aforementioned display substrate embodiments. For details, please refer to the aforementioned display substrate embodiments and will not be repeated in this embodiment. The specific process implementation of each structure can adopt existing process technologies and is not limited in this embodiment.

[0064] While the above description does not provide detailed technical details regarding patterning and etching of each layer, those skilled in the art will appreciate that various technical means can be employed to form layers, regions, and the like in desired shapes. Furthermore, those skilled in the art may devise methods that differ from those described above to form the same structure. Furthermore, while each embodiment has been described separately, this does not mean that the measures in each embodiment cannot be advantageously combined.

[0065] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0066] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for manufacturing a display substrate, characterized in that: include: providing a substrate; forming an anode layer on one side of the substrate; forming a common layer having an isolation opening on a side of the anode layer away from the base substrate; forming a light-emitting layer on a side of the common layer away from the base substrate; The light-emitting layer includes at least a red light-emitting unit and a green light-emitting unit, and the orthographic projection of the isolation opening on the base substrate is located between the orthographic projection of the red light-emitting unit on the base substrate and the orthographic projection of the green light-emitting unit on the base substrate; forming a cathode layer on a side of the light-emitting layer away from the substrate; The base substrate includes a first region corresponding to a red light-emitting unit and a second region corresponding to a green light-emitting unit, the common layer includes a first common layer and a second common layer; and the common layer having an isolation opening is formed on a side of the anode layer away from the base substrate, comprising: Using a first mask to mask the first area to form a first common layer on the side of the substrate having the anode layer; Using a second mask to block the second area to form a second common layer on the side of the substrate having the anode layer; wherein the areas blocked by the first mask and the second mask have an overlapping area, and the overlapping area forms the isolation opening; When manufacturing the first mask and the second mask, a ring area surrounded by four adjacent green pixels as vertices is used as a unit for manufacturing.

2. The manufacturing method according to claim 1, wherein The common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along the direction of the line connecting the red and green light-emitting units, the first width of the overlapping area is less than or equal to the width of the spacing area; the direction of the line connecting the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit.

3. The manufacturing method according to claim 1, wherein: The common layer between the red light-emitting unit and the green light-emitting unit has a spacing area; along a direction perpendicular to the line connecting the red and green light-emitting units, the second width of the overlapping area is greater than or equal to the width of the red light-emitting unit; the direction of the line connecting the red and green light-emitting units is the direction of the center line connecting the red light-emitting unit and the adjacent green light-emitting unit.

4. The manufacturing method according to claim 1, wherein: A pixel definition layer is formed on a side of the base substrate close to the anode layer; the pixel definition layer is used to define different light-emitting units in the light-emitting layer.

5. The manufacturing method according to claim 1, wherein: The common layer includes a hole transport layer; the isolation opening is provided on the hole transport layer.

6. A display substrate manufactured by the method according to any one of claims 1 to 5.

7. A display device, characterized in that: A display substrate manufactured by the manufacturing method according to any one of claims 1 to 5.

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