Display substrate, display panel and display substrate preparation method

Abstract

The application relates to the technical field of display, and discloses a display substrate, a display panel and a display substrate preparation method. In the application, the display substrate comprises an array substrate and a light-emitting layer, the light-emitting layer is arranged on one side of the array substrate, the light-emitting layer comprises a light-emitting area and a non-light-emitting area; the array substrate comprises at least one doped layer, the at least one doped layer has at least one first area and at least one second area, the first area and the second area are arranged adjacently, and the orthographic projection of the first area on the light-emitting layer completely covers the non-light-emitting area; the side surface of the first area close to the light-emitting layer is a first surface, the side surface of the first area away from the light-emitting layer is a second surface, the orthographic projection of the first surface on the light-emitting layer falls within the orthographic projection of the second surface on the light-emitting layer; the refractive index of the first area is consistent with the refractive index of the adjacent film layer, and the refractive index of the first area is greater than the refractive index of the second area. The embodiment of the application has the advantages of improving the transmittance while ensuring the invariability of pixel resolution.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display substrate, a display panel and a display substrate preparation method. BACKGROUND

[0002] Display panels, such as organic light-emitting diodes (OLED), have attracted great attention from academia and industry due to their great potential for development in solid-state lighting and flat-panel display. OLED flat panels can be made lighter and thinner.

[0003] OLED, as a new display technology, has many advantages over other display technologies, such as wide viewing angle, high contrast, fast response, low power consumption, foldable and flexible, etc., and thus has strong competitiveness in new generation displays.

[0004] With the wide development and application of OLED technology, the pursuit of high screen-to-body ratio (even full-screen) display with better visual experience has become one of the trends of current display technology development. In order to further improve the screen-to-body ratio, optical devices such as cameras and fingerprint recognition devices need to be placed under the screen to form under-screen cameras and under-screen fingerprint recognition, etc.

[0005] The main method of current under-screen camera and under-screen fingerprint recognition product solutions is to set a lower pixel density in the screen area directly opposite the camera and fingerprint recognition device, so as to increase the light transmission area between pixels, and thus achieve higher light transmittance, thereby realizing the under-screen camera without hole. However, there is an inherent contradiction between the improvement of transmittance and the improvement of pixel resolution in this scheme, that is, the increase of pixel resolution will lead to the increase of pixel density and the decrease of screen transmittance, and the improvement of screen transmittance will lead to the decrease of pixel resolution. SUMMARY

[0006] The purpose of the embodiments of the present application is to provide a display substrate, a display panel and a display substrate preparation method, which can improve the transmittance while ensuring the pixel resolution.

[0007] To solve the above technical problems, an embodiment of the present application provides a display substrate, comprising: an array substrate and a light-emitting layer, the light-emitting layer is arranged on one side of the array substrate, the light-emitting layer comprises a light-emitting area and a non-light-emitting area; the array substrate comprises at least one doped layer, the at least one doped layer has at least one first area and at least one second area, the first area and the second area are arranged adjacently, the first area completely covers the non-light-emitting area in orthographic projection on the light-emitting layer; a side surface of the first area close to the light-emitting layer is a first surface, a side surface of the first area away from the light-emitting layer is a second surface, the orthographic projection of the first surface on the light-emitting layer falls within the orthographic projection of the second surface on the light-emitting layer; the refractive index of the first area is consistent with the refractive index of an adjacent film layer, and the refractive index of the first area is greater than the refractive index of the second area.

[0008] An embodiment of the present application further provides a display panel, comprising: a transparent light-emitting area and a non-transparent light-emitting area adjacent to the transparent light-emitting area, and the transparent light-emitting area is provided with the display substrate as described above.

[0009] An embodiment of the present application further provides an array substrate preparation method, comprising: forming at least one doped layer, the doped layer has at least one first area and at least one second area, and the first area and the second area are arranged adjacently; forming a light-emitting layer on one side of the doped layer, the light-emitting layer comprises a light-emitting area and a non-light-emitting area; the orthographic projection of the first area on the light-emitting layer completely covers the non-light-emitting area; a side surface of the first area close to the light-emitting layer is a first surface, a side surface of the first area away from the light-emitting layer is a second surface, the orthographic projection of the first surface on the light-emitting layer falls within the orthographic projection of the second surface on the light-emitting layer; the refractive index of the first area is consistent with the refractive index of an adjacent film layer, and the refractive index of the first area is greater than the refractive index of the second area.

[0010] The present application forms at least one doped layer in the array substrate, the doped layer is arranged to include at least one first region and at least one second region arranged adjacently, and the first region completely covers the non-light-emitting region of the light-emitting layer in orthographic projection on the light-emitting layer. The ambient light incident in the direction perpendicular to the doped layer is blocked by the light-emitting region and cannot be incident into the second region. The ambient light incident into the second region has a large incident angle, and total reflection easily occurs on the contact surface between the doped layer and the film layer adjacent to the doped layer. Therefore, the refractive index of the first region is arranged to be greater than the refractive index of the second region. Part of the ambient light originally incident into the second region is totally reflected on the contact surface between the first region and the second region, and the incident direction of the part of the ambient light is changed so that the part of the ambient light is incident from the first region into the film layer adjacent to the doped layer. The refractive index of the first region is arranged to be consistent with the refractive index of the adjacent film layer, which can reduce the total reflection effect of the incident light on the contact surface between the first region and the adjacent film layer, and effectively improve the transmittance. In addition, the orthographic projection of the first surface on the light-emitting layer falls within the orthographic projection of the second surface on the light-emitting layer, which can avoid the incident light being reflected to the side of the light-emitting layer on the contact surface between the first region and the second region, reduce the loss of the incident light, and further improve the transmittance. Since the structure of the light-emitting layer is not changed in the present application, the technical effect of improving the transmittance of the array substrate while ensuring that the pixel resolution does not change is achieved.

[0011] Preferably, the orthographic projection of the first surface on the light-emitting layer is smaller than the orthographic projection of the second surface on the light-emitting layer. The orthographic projection of the first surface on the light-emitting layer is smaller than the orthographic projection of the second surface on the light-emitting layer, that is, the contact surface between the first region and the second region is arranged to be inclined, which increases the total reflection effect on the contact surface and further improves the transmittance.

[0012] Preferably, the first region further includes a first side surface between the first surface and the second surface, the first side surface is a curved surface, and the first side surface is arranged to be convex from the first region to the second region. In this way, the first side surface forms a shape similar to a concave mirror, which can reflect more ambient light to the direction of the first region, that is, more ambient light is incident through the first region, and the transmittance of the array substrate is further improved.

[0013] Preferably, the array substrate includes a first doped layer and a first inorganic layer arranged on one side of the first doped layer, the first doped layer includes a first doped region and a first non-doped region, the refractive index of the first doped region is smaller than the refractive index of the first inorganic layer, and the refractive index of the first doped region is greater than the refractive index of the first non-doped region.

[0014] Preferably, the first non-doped region includes an organic material, the first doped region includes the organic material and a doped material, and the refractive index of the doped material is greater than the refractive index of the organic material.

[0015] Preferably, the doping material comprises a metal oxide.

[0016] Preferably, the array substrate further comprises a second doping layer, the first doping layer is located on a side of the first inorganic layer away from the light-emitting layer, and the second doping layer is located on a side of the first inorganic layer close to the light-emitting layer; the second doping layer comprises a second doping region and a second non-doping region, a side surface of the second doping region close to the light-emitting layer is the first surface, and a side surface of the first doping region away from the light-emitting layer is the second surface; the refractive index of the second doping region is less than the refractive index of the first inorganic layer, and the refractive index of the second doping region is greater than the refractive index of the second non-doping region.

[0017] Preferably, the array substrate comprises a first substrate and a second substrate, the first doping layer is the first substrate, and the second doping layer is the second substrate; the array substrate comprises a planarization layer, and the first doping layer is the planarization layer.

[0018] Preferably, the forming of the at least one doping layer specifically comprises: forming a plurality of block-shaped protrusions that are isolated from each other on the first inorganic layer; forming the first regions on the block-shaped protrusions, and forming the second regions in the interval regions between the plurality of first regions; and the material of the block-shaped protrusions is the same as the material of the first regions. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0022] Figure 4 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0024] Figure 6 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0025] Figure 7 is a structural schematic diagram of a display substrate provided by an embodiment of the present application;

[0026] Figure 8 is a program flow chart of a display substrate manufacturing method according to an embodiment of the present application;

[0027] Figures 9-11 is a structure diagram of an array substrate in a step of forming a first doped layer on a first inorganic layer in a program flow chart of a display substrate manufacturing method according to a sixth embodiment of the present application. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and based on various changes and modifications of the following embodiments.

[0029] An embodiment of the present application relates to an array substrate, and a specific structure is shown in Figure 1 which includes an array substrate 10 and a light-emitting layer 20 arranged on one side of the array substrate 10, the light-emitting layer 20 includes a light-emitting region 21 and a non-light-emitting region 22, and the array substrate 10 includes at least one doped layer 11, the doped layer 11 includes at least one first region 111 and at least one second region 112 arranged adjacently, a normal projection of the first region 111 on the light-emitting layer 20 (A region in the figure) completely covers the non-light-emitting region 22, a side surface of the first region 111 close to the light-emitting layer 20 is a first surface 1111, a side surface of the first region 111 away from the light-emitting layer 20 is a second surface 1112, and a normal projection of the first surface 1111 on the light-emitting layer 20 falls within a normal projection of the second surface 1112 on the light-emitting layer 20. In this embodiment, a refractive index of the first region 111 tends to be consistent with a refractive index of an adjacent film layer, and the refractive index of the first region 111 is greater than a refractive index of the second region 112. Figure 1

[0030] Specifically, in this embodiment, as shown in Figure 1 , the light-emitting layer 20 includes an anode 23, a pixel definition layer 24 arranged on the anode 23, and an opening 25 arranged on the pixel definition layer 24, the opening 25 falls on the anode 23, and a region where the opening 25 is located is the light-emitting region 21. Other regions covered by the pixel definition layer 24 are the non-light-emitting region 22. In addition, the light-emitting layer 20 further includes a light-emitting material layer 26 arranged in the opening 25 and a cathode 27 covering the light-emitting material layer 26, and the light-emitting material layer 26 emits light under the action of electric charges between the anode 23 and the cathode 27.

[0031] Specifically, in this embodiment, as shown in Figure 1 , the doped layer 11 can be a first substrate, as shown in Figure 1 ​As shown, when the doped layer 11 is the first substrate, the adjacent film layer 30 can be an inorganic film layer such as an insulating layer or a buffer layer arranged adjacent to the first substrate 11 in the array substrate 10, or a structure such as a glass substrate arranged adjacent to the array substrate. It can be understood that the aforementioned doped layer 11 is the first substrate only as a specific example in this embodiment, and does not constitute a limitation. In other embodiments of the present application, the doped layer 11 can be, for example, a second substrate, and when the doped layer 11 is the second substrate, the adjacent film layer 30 can be, for example, a buffer layer or an insulating layer arranged adjacent to the second substrate 11 in the array substrate 10, and a structure such as a glass substrate 12 or a first substrate 13 arranged on the side of the second substrate 11 away from the light-emitting layer. For another example, the doped layer 11 can also be a planarization layer in the array substrate 10, and when the doped layer 11 is the planarization layer, the adjacent film layer 30 can be, for example, a passivation layer or an insulating layer arranged adjacent to the planarization layer 11 in the array substrate 10. In some embodiments of the present application, the doped layer 11 can also be a structure including both the first substrate and the second substrate, or a structure including both the first substrate and the planarization layer, which can be flexibly arranged according to actual needs. Figure 2 As shown, the doped layer 11 can also be, for example, a second substrate, and when the doped layer 11 is the second substrate, the adjacent film layer 30 can be, for example, a buffer layer or an insulating layer arranged adjacent to the second substrate 11 in the array substrate 10, and a structure such as a glass substrate 12 or a first substrate 13 arranged on the side of the second substrate 11 away from the light-emitting layer. For another example, the doped layer 11 can also be a planarization layer in the array substrate 10, and when the doped layer 11 is the planarization layer, the adjacent film layer 30 can be, for example, a passivation layer or an insulating layer arranged adjacent to the planarization layer 11 in the array substrate 10. In some embodiments of the present application, the doped layer 11 can also be a structure including both the first substrate and the second substrate, or a structure including both the first substrate and the planarization layer, which can be flexibly arranged according to actual needs.

[0032] Specifically, in this embodiment, the first region 111 can be a doped region to increase the refractive index of the first region 111, or the second region 112 can be a doped region to decrease the refractive index of the second region 111, which can be specifically arranged according to actual needs and the material of the doped layer. It is only necessary to ensure that the refractive index of the first region 111 is greater than that of the second region 112.

[0033] Compared with the prior art, at least one doped layer 11 is formed in the array substrate 10, the doped layer 11 is arranged to include at least one first region 111 and at least one second region 112 arranged adjacent to each other, and the orthographic projection of the first region 111 on the light-emitting layer 20 completely covers the non-light-emitting region 22 of the light-emitting layer 20. External light incident in a direction perpendicular to the doped layer 11 is blocked by the light-emitting region 21 and cannot be incident into the second region 112. The incident angle of external light incident into the second region 112 is large, and total reflection easily occurs at the contact surface of the doped layer 11 and the film layer 30 adjacent to the doped layer 11. Therefore, the refractive index of the first region 111 is arranged to be greater than that of the second region 112. Part of the external light originally incident into the second region 112 is totally reflected at the contact surface of the first region 111 and the second region 112, and the incident direction of this part of the external light is changed so that it is incident from the first region 111 into the film layer adjacent to the doped layer. The refractive index of the first region 111 is arranged to be consistent with that of the adjacent film layer 30, which can reduce the total reflection effect of the incident light at the contact surface between the first region 111 and the adjacent film layer 30, and effectively improve the transmittance.

[0034] In addition, the first surface 1111 is arranged on the light emitting layer 20, and the orthographic projection of the first surface 1111 on the light emitting layer 20 falls within the orthographic projection of the second surface 1112 on the light emitting layer 20, so that the incident light is reflected to the side of the light emitting layer 20 on the contact surface of the first region 111 and the second region 112, the loss of the incident light is reduced, and the transmittance is further improved. Since the structure of the light emitting layer is not changed in the present application, the technical effect of ensuring that the pixel resolution does not change while improving the transmittance of the array substrate is achieved.

[0035] It can be understood that the above technical features can achieve the technical effect of ensuring that the pixel resolution does not change while improving the transmittance of the array substrate. The specific structure of the array substrate in the present application will be illustrated below.

[0036] Specifically, in an embodiment of the present application, as shown in Figure 3 the orthographic projection of the first surface 1111 on the light emitting layer 20 is less than the orthographic projection of the second surface 1112 on the light emitting layer 20. That is, the contact surface of the first region 111 and the second region 112 is arranged obliquely, the total reflection effect on the contact surface of the first region 111 and the second region 112 is increased, and the transmittance is further improved.

[0037] Further, in an embodiment of the present application, as shown in Figure 4 the first region 111 further includes a first side surface 1113 between the first surface 1111 and the second surface 1112, the first side surface 1113 is a curved surface, and the first side surface 1113 is arranged protruding from the first region 111 to the second region 112. In this way, the first side surface 1113 forms a shape similar to a concave mirror, more external light can be reflected to the first region 111, that is, more external light is incident through the first region 111, and the transmittance of the array substrate is further improved.

[0038] Specifically, in an embodiment of the present application, as shown in Figure 5As shown, the array substrate 10 includes a first doped layer 12 and a first inorganic layer 13 arranged on one side of the first doped layer 12. The first doped layer 12 can be, for example, a first substrate, and the first inorganic layer 13 can be, for example, a buffer layer or an insulating layer. The first doped layer 12 includes a first doped region 121 and a first non-doped region 122. The refractive index of the first doped region 121 is lower than the refractive index of the first inorganic layer 13, and the refractive index of the first doped region 121 is higher than the refractive index of the first non-doped region 122. The first non-doped region includes an organic material, the first doped region 121 includes an organic material and a doped material, and the refractive index of the doped material is higher than the refractive index of the organic material. It can be understood that the aforementioned configuration of the first non-doped region including an organic material and the first doped region 121 including an organic material and a doped material is only a specific example of this embodiment and does not constitute a limitation. Since the array substrate 10 includes a first doping layer 12 and a first inorganic layer 13 arranged on one side of the first doping layer 12, the refractive index of the inorganic material is generally smaller than the refractive index of the inorganic material. Therefore, by doping some inorganic materials in some areas of the organic material, the refractive index of the first doping region 121 can be increased, and the refractive index difference between the first doping region 121 and the first inorganic layer 13 can be reduced, so that the refractive index of the first doping region 121 tends to be consistent with the refractive index of the first inorganic layer 13.

[0039] In one embodiment of the present application, the doping material may include a metal oxide, such as TiO2, SrO2, etc. Since metal oxides have a high melting point and excellent heat resistance, setting the high refractive index particles as metal oxide particles can ensure that the doping material does not change due to high temperature during the process preparation process, thereby ensuring the stability and reliability of the array substrate. It is understandable that the aforementioned doping material being metal oxide particles is only a preferred application example in one embodiment of the present application and does not constitute a limitation. In other embodiments of the present application, doping materials of other materials may also be used, as long as their refractive index is higher than that of the organic material.

[0040] Specifically, the doping ratio of the doping material and the organic material can be flexibly selected according to the refractive index of the doping material, the organic material, and the first inorganic layer 13. For example, when the doping material is TiO2 (refractive index 2.55), the organic material is polymethyl methacrylate (refractive index 1.5), and the material of the first inorganic layer 13 is zirconium oxide (refractive index 2.4), the doping ratio of TiO2:polymethyl methacrylate = 1:3 can be used. It should be understood that the above is only a specific example of this embodiment and does not constitute a limitation.

[0041] In one embodiment of the present invention, Figure 6 As shown, the array substrate 10 further includes a second doping layer 14. The second doping layer 14 may be, for example, a second substrate. It is understood thatFigure 7 The second doped layer 14 shown in the figure is disposed on the first inorganic layer 13 for illustrative purposes only and is not intended to be limiting. In other embodiments of the present invention, other film structures, such as a thermal conductive layer, may also be included between the second doped layer 14 and the first inorganic layer 13. The first doped layer 12 is located on the side of the first inorganic layer 13 away from the light-emitting layer 20, and the second doped layer 14 is located on the side of the first inorganic layer 13 closer to the light-emitting layer 20. The second doped layer 14 includes a second doped region 141 and a second undoped region 142. The surface of the second doped region 141 closer to the light-emitting layer 20 is a first surface 1111, and the surface of the first doped region 121 farther from the light-emitting layer 20 is a second surface 1112. The refractive index of the second doped region 141 is less than that of the first inorganic layer 13, and the refractive index of the second doped region 141 is greater than that of the second undoped region 142.

[0042] An embodiment of the present invention further provides a display panel, such as Figure 7 As shown, the display panel includes a transparent light-emitting area 100 and a non-transparent light-emitting area 200 adjacent to the transparent light-emitting area 100. The display substrate 300 provided in the aforementioned embodiment is disposed in the transparent light-emitting area 100, and another type of display substrate is disposed in the non-transparent light-emitting area 200. It will be understood that the foregoing is merely a specific example of an embodiment of the present invention and does not constitute a limitation. In other embodiments of the present invention, the display panel may also include only the transparent light-emitting area 100, and the entire transparent light-emitting area 100 may be provided with a display substrate 300 provided in the aforementioned embodiment.

[0043] Compared with the prior art, since the transparent light emitting area 100 of this embodiment is provided with the display substrate 300 provided in the aforementioned embodiment, the present embodiment also has the technical effects of the aforementioned embodiment, which will not be described in detail here.

[0044] An embodiment of the present invention also provides a method for preparing a display substrate, the specific process is as follows: Figure 8 As shown, including:

[0045] Step S101: forming at least one doping layer, wherein the doping layer has at least one first region and at least one second region, and the first region and the second region are adjacent to each other.

[0046] Specifically, in this embodiment, when it is necessary to prepare the first doped region and the first non-doped region, as shown in FIG. Figure 9 As shown, the mixture can be used to form a plurality of mutually isolated block-shaped protrusions 40 on the substrate 30, and then Figure 10As shown, the mixture is used to form the first regions 50 on the block-shaped protrusions 40, and the second regions 60 are formed in the interval regions between the plurality of first regions 50, and the material of the block-shaped protrusions 40 is the same as that of the first regions 50. Taking the organic material and the doping material provided in the foregoing embodiments as examples, first, the first organic material and the first doping material are doped to form a mixture, and then the mixture is used to form the block-shaped protrusions 40 on the substrate 30. For example, the first organic material is dissolved in an organic solvent to form an ink, and the first doping material is made into a powder and mixed into the ink to form the mixture. Then, the mixture is sprayed onto the substrate 30 and the protrusions 40, and finally, the organic molecules in the mixture are subjected to a polymerization reaction by heating or light irradiation to form a polymer, and the polymer is solidified to obtain the first regions 50. During the heating process, the presence of the block-shaped protrusions 40 causes a reflow effect, so that the side surfaces of the first regions 50 are arranged to be inclined, thereby forming the structure that the “orthographic projection of the first surface on the light-emitting layer is smaller than the orthographic projection of the second surface on the light-emitting layer” provided in the foregoing embodiments. Since the material of the block-shaped protrusions 40 is the same as that of the first regions 50, the first regions 50 are integrated with the block-shaped protrusions 40 after being prepared. Then, as shown, the second regions 60 are formed in the interval regions between the mutually isolated first regions 50. Figure 11 It can be understood that the foregoing is only an example of a specific method for preparing the first regions 50 in the present application, and does not constitute a limitation, and in other embodiments of the present application, other methods such as spray pyrolysis can also be used for preparation, and the specific method can be flexibly set according to actual needs.

[0047] Step S102: forming a light-emitting layer on one side of the doping layer, the light-emitting layer including light-emitting regions and non-light-emitting regions.

[0048] It can be found that the present embodiment is a preparation method embodiment corresponding to the foregoing embodiments, and the present embodiment can be implemented in cooperation with the foregoing embodiments. The related technical details and technical effects mentioned in the foregoing embodiments are still valid in the present embodiment, and in order to reduce repetition, they will not be described here again. Correspondingly, the related technical details mentioned in the present embodiment can also be applied to the foregoing embodiments.

[0049] Those skilled in the art can understand that all or part of the steps of the methods in the foregoing embodiments can be completed by using a program instructing related hardware. The program is stored in a storage medium and includes a plurality of instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods of the embodiments of the present application. The foregoing storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage media that can store program codes.

[0050] It is understood by those skilled in the art that the above-described embodiments are merely illustrative of the principles of the application, and that numerous and various changes can be made without departing from the spirit and scope of the application.

Claims

1. A display substrate, characterized in that: The array substrate comprises an array substrate and a light-emitting layer, wherein the light-emitting layer is arranged on one side of the array substrate and comprises a light-emitting area and a non-light-emitting area; The array substrate includes at least one doped layer, the at least one doped layer having at least one first region and at least one second region, the first region and the second region being adjacently arranged, an orthographic projection of the first region on the light-emitting layer completely covering the non-light-emitting region; a surface of the first region close to the light-emitting layer is a first surface, a surface of the first region away from the light-emitting layer is a second surface, and an orthographic projection of the first surface on the light-emitting layer falls within an orthographic projection of the second surface on the light-emitting layer; The refractive index of the first region tends to be consistent with the refractive index of the adjacent film layer, and the refractive index of the first region is greater than the refractive index of the second region.

2. The display substrate according to claim 1, wherein: The orthographic projection of the first surface on the light-emitting layer is smaller than the orthographic projection of the second surface on the light-emitting layer.

3. The display substrate according to claim 1, wherein The first area further includes a first side surface located between the first surface and the second surface. The first side surface is a curved surface and is convex from the first area toward the second area.

4. The display substrate according to claim 1, wherein The array substrate includes a first doped layer and a first inorganic layer arranged on one side of the first doped layer, the first doped layer includes a first doped region and a first non-doped region, the refractive index of the first doped region is consistent with the refractive index of the first inorganic layer, and the refractive index of the first doped region is greater than the refractive index of the first non-doped region.

5. The display substrate according to claim 4, wherein: The first non-doped region includes an organic material, the first doped region includes the organic material and a doping material, and the refractive index of the doping material is greater than the refractive index of the organic material.

6. The display substrate according to claim 5, wherein: The doping material includes a metal oxide.

7. The display substrate according to claim 4, wherein: The array substrate further includes a second doping layer, wherein the first doping layer is located on a side of the first inorganic layer away from the light-emitting layer, and the second doping layer is located on a side of the first inorganic layer close to the light-emitting layer; The second doped layer includes a second doped region and a second undoped region, a surface of the second doped region close to the light-emitting layer is the first surface, and a surface of the first doped region away from the light-emitting layer is the second surface; The refractive index of the second doped region is smaller than the refractive index of the first inorganic layer, and the refractive index of the second doped region is larger than the refractive index of the second non-doped region.

8. The display substrate according to claim 7, wherein: The array substrate includes a first substrate and a second substrate, the first doping layer is the first substrate, and the second doping layer is the second substrate; Or the array substrate includes a planarization layer, and the first doped layer is the planarization layer.

9. A display panel, characterized in that: include: A transparent light emitting area and a non-transparent light emitting area adjacent to the transparent light emitting area, wherein the display substrate according to any one of claims 1 to 8 is arranged in the transparent light emitting area.

10. A method for preparing a display substrate, characterized in that: include: Providing an array layer, forming at least one doping layer on one side of the array layer, the doping layer having at least one first region and at least one second region, the first region and the second region being adjacently arranged; forming a light-emitting layer on one side of the doping layer, wherein the light-emitting layer includes a light-emitting area and a non-light-emitting area; The orthographic projection of the first region on the light-emitting layer completely covers the non-light-emitting region; a surface of the first region close to the light-emitting layer is a first surface, a surface of the first region away from the light-emitting layer is a second surface, and the orthographic projection of the first surface on the light-emitting layer falls within the orthographic projection of the second surface on the light-emitting layer; The refractive index of the first region tends to be consistent with the refractive index of the adjacent film layer, and the refractive index of the first region is greater than the refractive index of the second region.

11. The method for preparing a display substrate according to claim 10, wherein: The steps of preparing the doping layer include: forming a plurality of spaced-apart block-shaped protrusions on one side surface of the array layer; A mixture containing doping materials is deposited or sprayed on the block-shaped protrusions and heated to form the first regions. The second regions are formed in the intervals between the first regions. The material of the block-shaped protrusions is the same as that of the first regions.

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