Display substrate and manufacturing method thereof, and display device

Abstract

A display substrate, a preparation method thereof, and a display device, the display substrate comprising a first display area (A1) and a second display area (A2), the second display area being located at least on one side of the first display area, the first display area being a sub-screen sensing area; the display substrate comprising at least: a substrate (2), at least located in the first display area and the second display area; a pixel circuit layer, at least a portion of the pixel circuit layer being located in the second display area and located on one side of the substrate; a first reflective interface (32), at least located in the first display area and the second display area, and located on a side of the substrate away from the pixel circuit layer; the first reflective interface reflecting at least a portion of light toward the pixel circuit layer; a first polarization structure (6), at least a portion of the first polarization structure being located in the second display area, and at least a portion of the first polarization structure being located between the substrate and the first reflective interface, the first polarization structure being configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to, but are not limited to, the field of display technology, and specifically to a display substrate and a method for preparing the same, and a display device. Background Art

[0002] With the continuous development of display technology, technologies such as notch screens, waterdrop notches, and in-display punch-holes have emerged to maximize screen-to-body ratios. These technologies utilize an under-display sensor area within a portion of the display area. For example, a camera can be placed below the under-display sensor area to reduce the camera's footprint, thereby increasing the screen-to-body ratio. However, these display devices often exhibit undesirable effects such as dark rings near the under-display sensor area, affecting the display quality. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail in this disclosure. This overview is not intended to limit the scope of the claims.

[0004] In one aspect, the present disclosure provides a display substrate comprising a first display area and a second display area, wherein the second display area is located on at least one side of the first display area, and the first display area is an under-screen sensing area; the display substrate comprises at least:

[0005] a substrate, located at least in the first display area and the second display area;

[0006] a pixel circuit layer, at least a portion of which is located in the second display area and on one side of the substrate;

[0007] a first reflective interface, located at least in the first display area and the second display area, and located on a side of the substrate away from the pixel circuit layer; the first reflective interface reflects at least part of the light toward the pixel circuit layer;

[0008] a first polarizing structure, at least a portion of the first polarizing structure is located in the second display area, and at least a portion of the first polarizing structure is located between the substrate and the first reflective interface, and the first polarizing structure is configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

[0009] In an exemplary embodiment, a third display area is further included, and the third display area is located on at least one side of the first display area and the second display area. At least part of the pixel circuit layer is located in the third display area, and at least part of the first polarization structure is located in the third display area.

[0010] In an exemplary embodiment, further comprising:

[0011] a plurality of first light-emitting elements, located in the first display area and on a side of the substrate away from the first reflective interface;

[0012] a second reflective interface located at least in the first display area and the second display area, and at least on a side of the plurality of first light-emitting elements away from the substrate, wherein the second reflective interface reflects light emitted by at least one first light-emitting element;

[0013] a second polarizing structure, located at least in the first display area and the second display area, and at least between the plurality of first light-emitting elements and the second reflective interface, the second polarizing structure being configured to transmit the reflected light, so that the transmitted reflected light forms a first circularly polarized light, and emit the first circularly polarized light toward the first reflective interface;

[0014] The first reflective interface is configured to convert the incident first circularly polarized light into a second circularly polarized light and reflect at least a portion of the second circularly polarized light to the first polarization structure; the first polarization structure is configured to block the second circularly polarized light from entering the pixel circuit layer.

[0015] In an exemplary embodiment, the second polarizing structure includes a second linear polarizing film layer and a second phase difference film layer stacked together, the second phase difference film layer is located on the side of the second linear polarizing film layer close to the substrate, the second linear polarizing film layer is configured to transmit the reflected light and form the transmitted reflected light into a first linear polarized light, and the second phase difference film layer is configured to transmit the first linear polarized light and form the transmitted first linear polarized light into the first circularly polarized light.

[0016] In an exemplary embodiment, the first polarizing structure includes a first linear polarizing film layer and a first phase difference film layer stacked together, the first phase difference film layer is located on the side of the first linear polarizing film layer close to the substrate, the first phase difference film layer is configured to transmit the second circularly polarized light and form the transmitted second circularly polarized light into a second linear polarized light, and the first linear polarizing film layer is configured to block the transmission of the incident second linear polarized light.

[0017] In an exemplary embodiment, a polarization direction of the second linearly polarized light is perpendicular to a polarization direction of the first linear polarizing film layer.

[0018] In an exemplary embodiment, the orthographic projection of the first linear polarizing film layer on the substrate does not overlap with the first display area, and at least a portion of the orthographic projection of the first phase difference film layer on the substrate overlaps with the first display area.

[0019] In an exemplary embodiment, an orthographic projection of the first polarizing structure on the substrate does not overlap with the first display area.

[0020] In an exemplary embodiment, it also includes: a back plate, which is located at least in the first display area and the second display area, and the back plate is located at least on the side of the first polarizing structure away from the substrate, and the intersection of the surface of the back plate away from the substrate and the outer side of the display substrate forms the first reflective interface.

[0021] In an exemplary embodiment, the device further comprises: a composite film, the composite film being located at least in the second display area, the composite film being located at least on a side of the backplane away from the substrate, and the orthographic projection of the composite film on the substrate not overlapping with the first display area.

[0022] In an exemplary embodiment, it further includes: a cover plate, which is located at least in the first display area and the second display area, and the cover plate is located on the side of the second polarizing structure away from the base, and the intersection of the surface of the cover plate away from the base and the outer side of the display substrate forms the second reflective interface.

[0023] In an exemplary embodiment, the device further includes: an encapsulation layer, the encapsulation layer being located at least in the first display area and the second display area, and the encapsulation layer being located on a side of the pixel circuit layer away from the substrate.

[0024] In an exemplary embodiment, it also includes: a plurality of second light-emitting elements, the pixel circuit layer includes a plurality of first pixel circuits and a plurality of second pixel circuits, the plurality of second light-emitting elements, the plurality of first pixel circuits and the plurality of second pixel circuits are all located in the second display area, the plurality of second light-emitting elements are located on the side of the pixel circuit layer away from the substrate, the first pixel circuit is electrically connected to the first light-emitting element, and the second pixel circuit is electrically connected to the second light-emitting element.

[0025] In an exemplary embodiment, the spacing between the first light-emitting elements is greater than the spacing between the second light-emitting elements; and / or the area of ​​the first light-emitting elements is smaller than the area of ​​the second light-emitting elements.

[0026] In an exemplary embodiment, three or four second light emitting elements are arranged in the second display area in a direction away from the first display area.

[0027] In an exemplary embodiment, an orthographic projection of the first polarizing structure on the substrate overlaps with an orthographic projection of the three or four second light-emitting elements on the substrate.

[0028] In an exemplary embodiment, a light absorbing layer is further included. The light absorbing layer is located at least in the first display area and the second display area, and the light absorbing layer is stacked between the first polarizing structure and the first reflective interface.

[0029] In an exemplary embodiment, a light shielding layer is further included. The light shielding layer is located in the second display area. The orthographic projection of the light shielding layer on the substrate does not overlap with the first display area. The light shielding layer is stacked on the side of the pixel circuit layer close to the substrate.

[0030] On the other hand, the present disclosure also provides a display device, comprising any of the display substrates described above and a photosensor, wherein the photosensor is located on a side away from the light-emitting side of the display substrate, and the orthographic projection of the photosensor on the display substrate overlaps with the first display area in the display substrate.

[0031] In another aspect, the present disclosure further provides a method for manufacturing a display substrate, the display substrate comprising a first display area and a second display area, the second display area being located on at least one side of the first display area, the first display area being an under-screen sensing area; the method comprising:

[0032] forming a substrate at least in the first display area and the second display area;

[0033] forming a pixel circuit layer on the substrate at least in the second display area;

[0034] A first reflective interface is formed at least on a side of the substrate away from the pixel circuit layer, and the first reflective interface is located at least in the first display area and the second display area; the first reflective interface reflects at least part of the light toward the pixel circuit layer;

[0035] A first polarizing structure is formed at least between the substrate and the first reflective interface, and at least a portion of the first polarizing structure is located in the second display area. The first polarizing structure is configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

[0036] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0038] Figure 1A A schematic diagram of a display substrate according to an embodiment of the present disclosure;

[0039] Figure 1B is another schematic diagram of a display substrate according to an embodiment of the present disclosure;

[0040] Figure 2A is a cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0041] Figure 2B is another cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0042] Figure 2C is another cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0043] Figure 2D is another cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0044] Figure 2E is another cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0045] Figure 3 is a schematic diagram of a display device according to an embodiment of the present disclosure;

[0046] Figure 4 A schematic diagram of a display substrate in related art;

[0047] Figure 5A FIG1 is a top view of the light-emitting element in the first display area of ​​the display substrate of the present disclosure;

[0048] Figure 5B is a top view of a light-emitting element in a second display area of ​​a display substrate disclosed herein;

[0049] Figure 5C is a top view of a light-emitting element in a third display area of ​​a display substrate disclosed herein;

[0050] Figure 5D FIG2 is a top view of the light-emitting element in the first display area of ​​the display substrate of the present disclosure;

[0051] Figure 6 This is a schematic diagram showing the light path in a substrate according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments can be implemented in a variety of different forms. A person of ordinary skill in the art can easily understand the fact that the methods and contents can be transformed into various forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0053] In the drawings, the sizes of various components, layer thicknesses, or regions may be exaggerated for clarity. Therefore, one embodiment of the present disclosure is not necessarily limited to these dimensions, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate idealized examples, and one embodiment of the present disclosure is not limited to the shapes or numerical values ​​shown in the drawings.

[0054] In this specification, ordinal numbers such as “first”, “second” and “third” are provided to avoid confusion among constituent elements, and are not intended to limit the number.

[0055] In this specification, for convenience, words and phrases indicating orientation or positional relationships, such as "middle," "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inside," and "outside," are used to illustrate the positional relationships of constituent elements with reference to the accompanying drawings. This is merely for the purpose of facilitating the description of this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present disclosure. The positional relationships of constituent elements may be appropriately changed depending on the direction in which each constituent element is described. Therefore, the present disclosure is not limited to the words and phrases described in the specification and may be appropriately replaced according to the circumstances.

[0056] In this specification, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, indirect connections through intermediaries, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure.

[0057] In this specification, a transistor refers to a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0058] In this specification, the first electrode can be a drain electrode and the second electrode can be a source electrode, or vice versa. The functions of "source electrode" and "drain electrode" may be interchanged when using transistors with opposite polarity or when the direction of current changes during circuit operation. Therefore, in this specification, "source electrode" and "drain electrode" may be interchanged.

[0059] In this specification, "electrically connected" includes components connected together via an element having some electrical function. There are no particular limitations on the "element having some electrical function" as long as it enables the transfer of electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with various functions.

[0060] In this specification, "parallel" refers to a state where the angle formed by two straight lines is greater than -10° and less than 10°, and thus also includes a state where the angle is greater than -5° and less than 5°. Furthermore, "perpendicular" refers to a state where the angle formed by two straight lines is greater than 80° and less than 100°, and thus also includes a state where the angle is greater than 85° and less than 95°.

[0061] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may be replaced with "conductive film." Similarly, "insulating film" may be replaced with "insulating layer."

[0062] The term "about" in the present disclosure refers to a numerical value that is not strictly defined and allows for process and measurement errors.

[0063] Figure 4 FIG. 1 is a schematic diagram of a display substrate of the related art. Figure 4 As shown, the display substrate of the related technology includes an under-screen sensing area B1 and a display area B2 located around the under-screen sensing area B1. For example, the under-screen sensing is an under-screen sensing camera (FDC, Full Display with Camera) area B1; the under-screen sensing area B1 includes a substrate and a plurality of first light-emitting elements b1 arranged on the substrate, and the display area B2 includes a substrate and a plurality of second light-emitting elements b2 and a pixel circuit layer b3 arranged on the substrate, and the plurality of second light-emitting elements b2 are located on the side of the pixel circuit layer b3 away from the substrate.

[0064] The inventors of this application discovered that light emitted by the first light-emitting element b1 in the under-screen sensing area B1 reflects off the inner film layer of the display substrate and strikes the pixel circuit layer b3 in the display area B2. This causes the pixel circuit layer b3 to have a positive bias, causing the second light-emitting element b2 to emit light. The radiation area covers approximately three to four second light-emitting elements b2, resulting in undesirable effects such as dark rings, which affect the display quality. The dark rings gradually decrease as the light moves away from the under-screen sensing area B1.

[0065] The inventor of this application painted the backlight side of the under-screen sensing area B1 black, so that the light intensity received by the second display unit b2 of the display area B2 was reduced, and the dark ring response was reduced by about 38%.

[0066] An embodiment of the present disclosure provides a display substrate, including a first display area and a second display area, wherein the second display area is located on at least one side of the first display area, and the first display area is an under-screen sensing area; the display substrate includes at least:

[0067] a substrate, located at least in the first display area and the second display area;

[0068] a pixel circuit layer, at least a portion of which is located in the second display area and on one side of the substrate;

[0069] a first reflective interface, located at least in the first display area and the second display area, and located on a side of the substrate away from the pixel circuit layer; the first reflective interface reflects at least part of the light toward the pixel circuit layer;

[0070] a first polarizing structure, at least a portion of the first polarizing structure is located in the second display area, and at least a portion of the first polarizing structure is located between the substrate and the first reflective interface, and the first polarizing structure is configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

[0071] The solution of this embodiment is illustrated below through some examples.

[0072] Figure 1A A schematic diagram of a display substrate according to an embodiment of the present disclosure. Figure 1B FIG. 1 is another schematic diagram of a display substrate according to an embodiment of the present disclosure. Figure 1A and Figure 1B As shown, the display substrate includes: a display area AA and a frame area BB located around the display area AA. The display area AA may include: a first display area A1, a second display area A2 and a third display area A3. The second display area A2 may be located on at least one side of the first display area A1. The third display area A3 is located on at least one side of the first display area A1 and the second display area A2. The area within the display area AA other than the first display area A1 and the second display area A2 is the third display area A3. Among them, the first display area A1 can also be called an under-screen sensing area, for example: an under-screen camera (FDC, Full Display with Camera) area, the second display area A2 can also be called a buffer area, and the third display area A3 can also be called a normal display area. However, this embodiment is not limited to this.

[0073] In an exemplary embodiment, Figure 1A and Figure 1BAs shown, the first display area A1 and the second display area A2 can be located in the top center of the display substrate. However, this embodiment is not limited to this. For example, the first display area A1 and the second display area A2 can be located in other positions such as the upper left corner or the upper right corner of the display substrate.

[0074] In an exemplary embodiment, Figure 1A and Figure 1B As shown, the second display area A2 may be located on two opposite sides of the first display area A1 in the first direction X. However, this embodiment is not limited thereto. For example, the second display area may be located on one side of the first display area in the first direction, or may be located on at least one side of the first display area in the second direction.

[0075] In an exemplary embodiment, Figure 1A and Figure 1B As shown, the display area AA may be a rectangle, for example, a rounded rectangle. Figure 1A As shown, the first display area A1 can be circular or elliptical. Figure 1B As shown, the first display area A1 may be a rectangle. However, this embodiment is not limited thereto. For example, the first display area may be in other shapes such as a quadrilateral or a pentagon.

[0076] In an exemplary embodiment, the first display area A1 may also be referred to as the under-screen sensing area, which may be a light-transmitting display area. The orthographic projection of hardware such as a light-sensitive sensor (e.g., a camera) on the display substrate may be located within the first display area A1 of the display substrate. The display substrate of this example does not require perforations, and while ensuring the practicality of the display substrate, a true full-screen display may be possible. In some examples, such as Figure 1A As shown, the first display area A1 may be circular, and the size of the positive projection of the light sensor on the display substrate may be smaller than or equal to the size of the first display area A1. Figure 1B As shown, the first display area A1 may be rectangular, and the size of the orthographic projection of the light sensor on the display substrate may be smaller than or equal to the size of the inscribed circle of the first display area A1. However, this embodiment is not limited thereto.

[0077] In an exemplary embodiment, a display substrate may include: a plurality of sub-pixels disposed on a substrate, at least one of which may include a pixel circuit and a light-emitting element. The pixel circuit is configured to drive the light-emitting element. For example, the pixel circuit is configured to provide a driving current to drive the light-emitting element to emit light. For example, the light-emitting element may be an organic light-emitting diode (OLED), which, when driven by its corresponding pixel circuit, emits red, green, blue, or white light. The color of the light emitted by the light-emitting element can be determined as desired.

[0078] In an exemplary embodiment, to improve the light transmittance of the first display area A1, only a light-emitting element may be provided in the first display area A1, while a pixel circuit driving the light-emitting element in the first display area A1 may be provided in the second display area A2. In other words, the light transmittance of the first display area A1 is improved by separating the light-emitting element and the pixel circuit. In this example, no pixel circuit is provided in the first display area A1.

[0079] Of course, pixel circuits can also be provided in the first display area A1. For example, island pixel circuits are provided in the first display area A1, and the number of pixel circuits per unit area (e.g., 1000 square microns) in the first display area A1 is smaller than the number of pixel circuits in the third display area A3.

[0080] Optionally, the area of ​​the first light-emitting elements 21 in the first display area A1 is smaller than the area of ​​the second light-emitting elements 22 and / or the third light-emitting elements 23. For example, the area of ​​the first light-emitting elements 21 of at least one color (e.g., red R) in the first display area A1 is smaller than the area of ​​the second light-emitting elements 22 (e.g., red R) and / or the third light-emitting elements 23 (e.g., red R) of the corresponding color. Optionally, the spacing between the first light-emitting elements 21 in the first display area A1 is greater than the spacing between the second light-emitting elements 22 in the second display area A2; and / or the spacing between the first light-emitting elements 21 in the first display area A1 is greater than the spacing between the third light-emitting elements 23 in the third display area A3.

[0081] Optionally, the shape of the first light emitting element 21 in the first display area A1 is different from the shape of the second light emitting element 22 and / or the third light emitting element 23. For example, the shape of the first light emitting element 21 in the first display area A1 is circular, and the shape of the second light emitting element 22 and / or the third light emitting element 23 is rectangular.

[0082] Figure 2C FIG. 1 is another cross-sectional view of a display substrate according to an embodiment of the present disclosure. Figure 2CAs shown, the display substrate of the embodiment of the present disclosure includes a substrate 2 and a plurality of first light-emitting elements 21, a plurality of second light-emitting elements 22, and a plurality of third light-emitting elements 23 arranged on the substrate 2. The plurality of first light-emitting elements 21 are located in the first display area A1, the plurality of second light-emitting elements 22 are located in the second display area A2, and the plurality of third light-emitting elements 23 are located in the third display area A3. A quantum dot structure 20 of a corresponding color can be arranged above or below the corresponding positions of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23. For example, a red quantum dot element is arranged above the red light-emitting element (R) among the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23. For example, the quantum dot structure 20 includes a plurality of first quantum dot elements 211, a plurality of second quantum dot elements 221, and a plurality of third quantum dot elements 231. The plurality of first quantum dot elements 211 are arranged in a one-to-one correspondence with the plurality of first light-emitting elements 21. The first quantum dot elements 211 are located on the side of the first light-emitting elements 21 away from the substrate, and at least a portion of the orthographic projections of the first quantum dot elements 211 on the substrate 2 overlap with the orthographic projections of the first light-emitting elements 21 on the substrate 2. The plurality of second quantum dot elements 221 are arranged in a one-to-one correspondence with the plurality of second light-emitting elements 22. The second quantum dot elements 221 are located on the side of the second light-emitting elements 22 away from the substrate, and at least a portion of the orthographic projections of the second quantum dot elements 221 on the substrate 2 overlap with the orthographic projections of the second light-emitting elements 22 on the substrate 2. The plurality of third quantum dot elements 231 are arranged in a one-to-one correspondence with the plurality of third light-emitting elements 23. The third quantum dot elements 231 are located on the side of the third light-emitting elements 23 away from the substrate, and at least a portion of the orthographic projections of the third quantum dot elements 231 on the substrate 2 overlap with the orthographic projections of the third light-emitting elements 23 on the substrate 2.

[0083] Optionally, the number of quantum dot elements per unit area (e.g., 1000 square microns) in the first display area A1 is smaller than the number of quantum dot elements per unit area (e.g., 1000 square microns) in the second display area A2; and / or, the number of quantum dot elements per unit area (e.g., 1000 square microns) in the first display area A1 is smaller than the number of quantum dot elements per unit area (e.g., 1000 square microns) in the third display area A3.

[0084] Optionally, the area of ​​the first quantum dot elements 211 in the first display area A1 is smaller than the area of ​​the second quantum dot elements 221 in the second display area A2 and / or the area of ​​the third quantum dot elements 231 in the third display area A3. Optionally, the spacing between the first quantum dot elements 211 in the first display area A1 is greater than the spacing between the second quantum dot elements 221 in the second display area A2; and / or the spacing between the first quantum dot elements in the first display area A1 is greater than the spacing between the third quantum dot elements 231 in the third display area.

[0085] Optionally, the shape of the first quantum dot element 211 in the first display area A1 is different from the shape of the second quantum dot element 221 and / or the third quantum dot element 231. For example, the shape of the first quantum dot element 211 in the first display area A1 is circular, and the shape of the second quantum dot element 221 and / or the third quantum dot element 231 is rectangular.

[0086] In example embodiments, materials of the first quantum dot element 211 , the second quantum dot element 221 , and the third quantum dot element 231 may include a II-VI compound, a III-V compound, a IV-VI compound, a IV compound, or a combination thereof.

[0087] In an exemplary embodiment, Figure 2C As shown, the display substrate of the embodiment of the present disclosure also includes an insulating layer 24, which is located between the quantum dot structure 20 and the multiple first light-emitting elements 21, the multiple second light-emitting elements 22 and the multiple third light-emitting elements 23, and is used to isolate the quantum dot structure 20 from the multiple first light-emitting elements 21, the multiple second light-emitting elements 22 and the multiple third light-emitting elements 23, respectively.

[0088] In an exemplary embodiment, Figure 2C As shown, the quantum dot structure 20 in the display substrate of the embodiment of the present disclosure also includes a black matrix 25, which is located between the first quantum dot elements 211 in the first display area A1, between the second quantum dot elements 221 in the second display area A2, and between the third quantum dot elements 231 in the third display area A3.

[0089] Figure 2A FIG. 1 is a cross-sectional view of a display substrate according to an embodiment of the present disclosure. Figure 2A As shown, within a plane perpendicular to the display substrate, the display substrate may include: a plurality of first light-emitting elements 21, a plurality of second light-emitting elements 22, a plurality of third light-emitting elements 23, a plurality of first pixel circuits 13, a plurality of second pixel circuits 11, and a plurality of third pixel circuits 12. The plurality of first light-emitting elements 21 are located in a first display area A1, the plurality of second light-emitting elements 22, the plurality of first pixel circuits 13, and the plurality of second pixel circuits 11 are located in a second display area A2, and the plurality of third light-emitting elements 23 and the plurality of third pixel circuits 12 are located in a third display area A3. The first display area A1 can also be referred to as an under-screen sensing area, which can be a light-transmitting display area. The second display area A2 can also be referred to as a buffer area. The third display area A3 can also be referred to as a normal display area. The structures of the first pixel circuits 13, the second pixel circuits 11, and the third pixel circuits 12 can be identical. The sizes of the first pixel circuits 13, the second pixel circuits 11, and the third pixel circuits 12 can also be identical.

[0090] In an exemplary embodiment, Figure 2A As shown, at least one first pixel circuit 13 is electrically connected to at least one first light-emitting element 21. For example, one first pixel circuit 13 is electrically connected to two first light-emitting elements 21 via a conductive line. The orthographic projections of the first pixel circuit 13 and the electrically connected first light-emitting element 21 on the substrate may not overlap. At least one second pixel circuit 11 is electrically connected to at least one second light-emitting element 22. The orthographic projection of the at least one second pixel circuit 11 on the substrate at least partially overlaps with the orthographic projection of the at least one second light-emitting element 22 on the substrate. For example, one second pixel circuit 11 is electrically connected to two second light-emitting elements 22. The orthographic projections of the second pixel circuit 11 and the electrically connected second light-emitting element 22 on the substrate may overlap. At least one third pixel circuit 12 is electrically connected to at least one third light-emitting element 23. The orthographic projection of the at least one third pixel circuit 12 on the substrate at least partially overlaps with the orthographic projection of the at least one third light-emitting element 23 on the substrate. For example, multiple third pixel circuits 12 are electrically connected to multiple third light-emitting elements 23 in a one-to-one correspondence. The orthographic projections of the third pixel circuit 12 and the electrically connected third light-emitting element 23 on the substrate overlap.

[0091] In some embodiments, at least one first pixel circuit can be electrically connected to at least one first light-emitting element 21 and at least one second light-emitting element 22. For example, one first pixel circuit 13 is electrically connected to one first light-emitting element 21 and one second light-emitting element 22 via conductive lines. At least one second pixel circuit can be electrically connected to at least one first light-emitting element 21 and at least one second light-emitting element 22. For example, one second pixel circuit 13 is electrically connected to one first light-emitting element 21 and one second light-emitting element 22 via conductive lines.

[0092] In an exemplary embodiment, the first pixel circuit of the second display area A2 is electrically connected to the first light-emitting element 21 through a conductive wire. The conductive wire can extend from the second display area A2 to the first display area A1. One end of the conductive wire can be electrically connected to the first pixel circuit in the second display area A2, and the other end can be electrically connected to the first light-emitting element 21 in the first display area A1, thereby achieving an electrical connection between the first pixel circuit and the first light-emitting element 21. In some examples, the conductive wire can be made of a transparent conductive material. For example, the conductive wire can be made of a conductive oxide material. For example, the conductive oxide material can include indium tin oxide (ITO). However, this embodiment is not limited to this.

[0093] In an exemplary embodiment, Figure 2AAs shown, the first display area A1 is not provided with a pixel circuit, while the second display area A2 is provided with multiple first pixel circuits and multiple second pixel circuits 11. The first pixel circuit can provide a driving signal to the first light-emitting element 21 in the first display area A1 to drive the first light-emitting element 21 to emit light. The second pixel circuit 11 can provide a driving signal to the second light-emitting element 22 in the second display area A2 to drive the second light-emitting element 22 to emit light. The third pixel circuit 12 provided in the third display area A3 can provide a driving signal to the third light-emitting element 23 in the third display area A3 to drive the third light-emitting element 23 to emit light.

[0094] In an exemplary embodiment, the first display area A1 is a light-transmitting display area, and the second display area A2 and the third display area A3 are non-light-transmitting display areas. That is, the first display area A1 can be light-transmitting, and the transmittance of the second display area A2 and the third display area A3 is less than the transmittance of the first display area A1; of course, the transmittance of the third display area A3 can also be less than the transmittance of the second display area A2, and less than the transmittance of the first display area A1. In this way, there is no need to perform hole-digging processing on the display substrate, and the required hardware structures such as the light sensor can be directly set below the first display area, laying a solid foundation for the realization of a true full screen. In addition, since the first display area A1 only includes light-emitting elements and does not include pixel circuits, it can also ensure that the light transmittance of the first display area A1 is good.

[0095] Figure 5A FIG1 is a top view of the light-emitting element in the first display area of ​​the display substrate of the present disclosure; Figure 5B is a top view of a light-emitting element in a second display area of ​​a display substrate disclosed herein; Figure 5C It is a top view of the light-emitting elements of the third display area in the display substrate of the present disclosure. In an exemplary embodiment, a plurality of pixel units are arranged in the display area AA. At least one pixel unit may include: a green (G) light-emitting element, a red (R) light-emitting element and a blue (B) light-emitting element. A green light-emitting element, a red light-emitting element and a blue light-emitting element are arranged in sequence in the first direction X. The light-emitting elements of this example adopt an RGB arrangement. For example, a plurality of first pixel units are arranged in the first display area A1, and the first pixel unit may include: a green (G) first light-emitting element 21a, a red (R) first light-emitting element 21b and a blue (B) first light-emitting element 21c. A green first light-emitting element 21a, a red first light-emitting element 21b and a blue first light-emitting element 21c are arranged in sequence in the first direction X, as shown in FIG. Figure 5AAs shown. The second display area A2 is arranged with a plurality of second pixel units, and the second pixel units may include: a green (G) second light emitting element 22a, a red (R) second light emitting element 22b and a blue (B) second light emitting element 22c. A green second light emitting element 22a, a red second light emitting element 22b and a blue second light emitting element 22c are arranged in sequence in the first direction X, as shown. Figure 5B As shown. The third display area A3 is arranged with a plurality of third pixel units, and the third pixel units may include: a green (G) third light emitting element 23a, a red (R) third light emitting element 23b and a blue (B) third light emitting element 23c. A green third light emitting element 23a, a red third light emitting element 23b and a blue third light emitting element 23c are arranged in sequence in the first direction X, as shown. Figure 5C shown.

[0096] Figure 5D FIG2 is a top view of the light-emitting elements of the first display area in the display substrate of the present disclosure. However, this embodiment is not limited to this. In some examples, a pixel unit may include light-emitting elements of other colors and other numbers. For example, a plurality of first pixel units are arranged in the first display area A1, and the first pixel unit may include: a green (G) first light-emitting element 21a, a red (R) first light-emitting element 21b, a blue (B) first light-emitting element 21c and a white first light-emitting element 21d. A green (G) first light-emitting element 21a, a red (R) first light-emitting element 21b, a blue (B) first light-emitting element 21c and a white first light-emitting element 21d may be arranged horizontally in parallel, vertically in parallel or in a herringbone manner. For example, a green (G) first light-emitting element 21a, a red (R) first light-emitting element 21b, a blue (B) first light-emitting element 21c and a white first light-emitting element 21d are arranged horizontally in parallel, as shown in FIG2 . Figure 5D However, this embodiment is not limited thereto.

[0097] In an exemplary embodiment, Figure 2A As shown, in a plane perpendicular to the display substrate, the display substrate may include:

[0098] Substrate 2, located in the first display area A1, the second display area A2 and the third display area A3;

[0099] The pixel circuit layer includes a plurality of first pixel circuits 13, a plurality of second pixel circuits 11, and a plurality of third pixel circuits 12. The plurality of first pixel circuits 13 and the plurality of second pixel circuits 11 are located in the second display area A2 and on one side of the substrate 2. The plurality of third pixel circuits 12 are located in the third display area A3 and on one side of the substrate 2.

[0100] a plurality of first light-emitting elements 21, a plurality of second light-emitting elements 22, and a plurality of third light-emitting elements 23, wherein the plurality of first light-emitting elements 21 are located in the first display area and on one side of the substrate 2; the plurality of second light-emitting elements 22 are located in the second display area A2 and on a side of the pixel circuit layer away from the substrate 2; and the plurality of third light-emitting elements 23 are located in the third display area A3 and on a side of the pixel circuit layer away from the substrate 2;

[0101] The encapsulation layer 3 is located in the first display area A1, the second display area A2, and the third display area A3, and is located on a side of the plurality of first light-emitting elements 21, the plurality of second light-emitting elements 22, and the plurality of third light-emitting elements 23 away from the substrate 2, and covers the plurality of first light-emitting elements 21, the plurality of second light-emitting elements 22, and the plurality of third light-emitting elements 23;

[0102] The second polarizing structure 4 is located in the first display area A1, the second display area A2 and the third display area A3, and is located on the side of the encapsulation layer 3 away from the substrate 2;

[0103] The cover plate 5 is located in the first display area A1, the second display area A2, and the third display area A3, and is located on the side of the second polarizing structure 4 away from the substrate 2;

[0104] a first polarizing structure 6, the first polarizing structure 6 being located in the second display area A2 and the third display area A3, and being located on a side of the substrate 2 away from the pixel circuit layer;

[0105] The back plate 1 is located in the first display area A1, the second display area A2, and the third display area A3, and is located on the side of the first polarizing structure 6 away from the substrate 2;

[0106] The first reflective interface 32 is located in the first display area A1, the second display area A2, and the third display area A3, and is located at least on the side of the substrate 2 away from the pixel circuit layer. The first reflective interface reflects at least a portion of light toward the pixel circuit layer. The first polarizing structure 6 is configured to block light reflected from the first reflective interface from entering the pixel circuit layer. For example, the first polarizing structure 6 is configured to block light reflected from the first display area A1 from entering the first reflective interface and then from entering the pixel circuit layer.

[0107] In an exemplary embodiment, Figure 2A As shown, the interface between the surface of the backplane 1 of the display substrate on the side away from the base 2 and the outer side of the display substrate forms a first reflective interface 32 in the embodiment of the present disclosure. In some embodiments, the interface between other film layers on the side of the second polarizing structure of the display substrate on the side away from the base can also form a second reflective interface, and the interface between other film layers on the side of the first polarizing structure of the display substrate on the side away from the base can also form a first reflective interface. However, this embodiment is not limited to this.

[0108] In an exemplary embodiment, Figure 2A As shown, in a plane perpendicular to the display substrate, the first display area A1 may include: a backplane 1, a base 2 disposed on one side of the backplane 1, a plurality of first light-emitting elements 21 disposed on the side of the base 2 away from the backplane 1, an encapsulation layer 3 disposed on the side of the plurality of first light-emitting elements 21 away from the backplane 1, a second polarizing structure 4 disposed on the side of the encapsulation layer 3 away from the backplane 1, and a cover plate 5 disposed on the side of the second polarizing structure 4 away from the backplane 1. The first display area A1 does not include a pixel circuit layer or a first polarizing structure, and the orthographic projection of the first polarizing structure on the base 2 does not overlap with the first display area A1.

[0109] like Figure 2A As shown, in a plane perpendicular to the display substrate, the second display area A2 may include: a backplane 1, a first polarizing structure 6 disposed on the backplane 1, a substrate 2 disposed on the side of the first polarizing structure 6 away from the backplane 1, a pixel circuit layer disposed on the side of the substrate 2 away from the backplane 1, a plurality of second light-emitting elements 22 disposed on the side of the pixel circuit layer away from the backplane 1, an encapsulation layer 3 disposed on the side of the plurality of second light-emitting elements 22 away from the backplane 1, a second polarizing structure 4 disposed on the side of the encapsulation layer 3 away from the backplane 1, and a cover plate 5 disposed on the side of the second polarizing structure 4 away from the backplane 1. The pixel circuit layer includes a plurality of first pixel circuits and a plurality of second pixel circuits 11. The second display area A2 is provided with a pixel circuit layer and a first polarizing structure 6.

[0110] like Figure 2A As shown, in a plane perpendicular to the display substrate, the third display area A3 may include: a backplane 1, a first polarizing structure 6 disposed on the backplane 1, a substrate 2 disposed on the side of the first polarizing structure 6 away from the backplane 1, a pixel circuit layer disposed on the side of the substrate 2 away from the backplane 1, a routing layer disposed on the side of the pixel circuit layer away from the backplane 1, a plurality of third light-emitting elements 23 disposed on the side of the routing layer away from the backplane 1, an encapsulation layer 3 disposed on the side of the plurality of third light-emitting elements 23 away from the backplane 1, a second polarizing structure 4 disposed on the side of the encapsulation layer 3 away from the backplane 1, and a cover plate 5 disposed on the side of the second polarizing structure 4 away from the backplane 1. The pixel circuit layer includes a plurality of third pixel circuits 12. The routing layer includes a plurality of signal routing lines 7. The third display area A3 is provided with a pixel circuit layer, a routing layer, and the first polarizing structure 6. The signal routing lines 7 may include at least one of a scan line, a data signal line, a ground line, a first drive line, and a second drive line.

[0111] In an exemplary embodiment, Figure 2AAs shown, in a plane perpendicular to the display substrate, the first display area A1 is not provided with a pixel circuit layer, a first polarizing structure, or a wiring layer, ensuring good light transmittance in the first display area A1. The second display area A2 is provided with a pixel circuit layer and a first polarizing structure, but no wiring layer. The third display area A3 is provided with a pixel circuit layer, a wiring layer, and a first polarizing structure.

[0112] In an exemplary embodiment, Figure 1A and 1B As shown, in a plane parallel to the display substrate, the second display area A2 is arranged with three or four second light-emitting elements 22 in a direction away from the first display area A1. For example, the second display area A2 may include a first region a and a second region b in the first direction X, and the first region a and the second region b are located on both sides of the first display area A1 in the first direction X: the first region a and the second region b respectively include a green (G) second light-emitting element, a red (R) second light-emitting element, and a blue (B) second light-emitting element, and the green (G) second light-emitting element, the red (R) second light-emitting element, and the blue (B) second light-emitting element are arranged along the first direction X.

[0113] The inventors' research has found that the radiant area of ​​the dark ring is approximately three to four light-emitting elements, and the dark ring gradually decreases as it moves away from the first display area A1. By arranging three or four light-emitting elements in the second display area A2, away from the first display area A1, the display substrate of this disclosed embodiment prevents the dark ring from extending into the third display area A3, thereby preventing it from affecting the display quality of the third display area A3.

[0114] In an exemplary embodiment, Figure 1A and 1B As shown, within a plane parallel to the display substrate, the first polarizing structure 6 can be located only in the second display area A2. The orthographic projection of the first polarizing structure 6 on the substrate 2 overlaps with the second display area A2, and the orthographic projection of the first polarizing structure 6 on the substrate 2 does not overlap with either the first display area A1 or the third display area A3. The first polarizing structure 6 covers at least three or four light-emitting elements in the second display area A2 that are arranged away from the first display area A1. For example, the first polarizing structure 6 is located in the first area a and the second area b of the second display area A2.

[0115] Figure 2D FIG. 1 is another cross-sectional view of a display substrate according to an embodiment of the present disclosure. Figure 2DAs shown, the display substrate of the disclosed embodiment further includes a light absorbing layer 40. The light absorbing layer 40 is located in the first display area A1, the second display area A2, and the third display area A3. The light absorbing layer 40 is stacked between the first polarizing structure 6 and the first reflective interface 32. For example, the light absorbing layer 40 is stacked between the first polarizing structure 6 and the backplane 1. The light absorbing layer 40 is configured to absorb light emitted toward the first reflective interface 32. By absorbing light, the light absorbing layer 40 can reduce the amount of light emitted toward the first reflective interface 32, thereby reducing the amount of light reflected from the first reflective interface 32 to the pixel circuit layer, thereby preventing undesirable phenomena such as dark rings.

[0116] Figure 2E FIG. 1 is another cross-sectional view of a display substrate according to an embodiment of the present disclosure. Figure 2E As shown, the display substrate of the disclosed embodiment further includes a light-shielding layer 50. The light-shielding layer 50 is located in the second display area A2 and the third display area A3. The light-shielding layer 50 is stacked on the side of the pixel circuit layer near the substrate 2. The light-shielding layer 50 blocks light from the second display area A2 and the third display area A3. The light-shielding layer 50 is not located in the first display area A1, and its orthographic projection on the substrate 2 does not overlap with the first display area A1, thereby avoiding blocking light from the first display area A1 and affecting its light transmittance.

[0117] In an exemplary embodiment, the light shielding layer 50 forms a mesh structure, including a pattern area and a hollow area. The orthographic projection of the pattern area of ​​the light shielding layer 50 on the substrate 2 overlaps with the orthographic projection of the pixel circuit on the substrate 2 .

[0118] In some embodiments, the light shielding layer forms a mesh structure and can be located in the first display area A1, the second display area A2, and the third display area A3. The area of ​​the hollowed-out area of ​​the light shielding layer in the first display area A1 is larger than the area of ​​the hollowed-out area of ​​the light shielding layer in the second display area A2; and / or the area of ​​the hollowed-out area of ​​the light shielding layer in the first display area A1 is larger than the area of ​​the hollowed-out area of ​​the light shielding layer in the third display area A3.

[0119] In an exemplary embodiment, the substrate 2 may be made of polyimide (PI), polyethylene terephthalate (PET), or a surface-treated polymer soft film.

[0120] In an exemplary embodiment, the pixel circuit in the display substrate of the embodiment of the present disclosure may include a transistor and a capacitor, and the transistor may include an active layer, a gate, and a source and drain.

[0121] In an exemplary embodiment, the light-emitting element in the display substrate of the embodiment of the present disclosure may be an OLED, a QLED, a Micro-LED or a Mini-LED. The light-emitting element may include an anode layer, a pixel definition layer, an organic light-emitting layer and a cathode layer. The organic light-emitting layer may include a stacked hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer. In some examples, the cathode layer of the first display area A1, the cathode layer of the second display area A2 and the cathode layer of the third display area A3 may be an integral structure. In this example, the cathode layer of the display area may be a whole-surface cathode. For example, the cathode layer may be a transparent cathode, for example, it may be prepared using a transparent conductive material such as ITO or IZO. In this example, the light-emitting element may emit light from the side away from the substrate through the transparent cathode to realize a top emission structure. However, this embodiment is not limited to this. For example, the cathode layer of the first display area A1 may be a patterned cathode having a hollow area.

[0122] In an exemplary embodiment, the present disclosure shows that the encapsulation layer 3 in the substrate may include a stacked first encapsulation layer, a second encapsulation layer, and a third encapsulation layer. The first encapsulation layer is made of an inorganic material, the second encapsulation layer is made of an organic material, and the third encapsulation layer is made of an inorganic material, covering the first and second encapsulation layers. However, this embodiment is not limited to this. In some examples, the encapsulation layer may adopt a five-layer structure of inorganic / organic / inorganic / organic / inorganic.

[0123] In an exemplary embodiment, the display substrate of the disclosed embodiment further includes a first dielectric layer, a second dielectric layer, and a third dielectric layer, which are stacked sequentially in a direction away from the substrate 2. The first dielectric layer is located in the first display area A1, the second display area A2, and the third display area A3, and is stacked between the pixel circuit layer and the substrate 2. The second dielectric layer is located in the first display area A1, the second display area A2, and the third display area A3, and is stacked between the pixel circuit layer and the wiring layer. The third dielectric layer is located in the first display area A1, the second display area A2, and the third display area A3, and is stacked between the wiring layer and the light-emitting element. The first dielectric layer, the second dielectric layer, and the third dielectric layer can be made of an organic material, such as a resin.

[0124] In an exemplary embodiment, the display substrate of the disclosed embodiment further includes a first adhesive layer 8 , which is located in the first display area A1, the second display area A2, and the third display area A3. In the second and third display areas A2 and A3, the first adhesive layer 8 is laminated between the backplane 1 and the first polarizing structure 6. In the first display area A1, the first adhesive layer 8 is laminated between the backplane 1 and the substrate 2. The first adhesive layer 8 is used to bond the first polarizing structure 6 to the backplane 1 and the substrate 2 to the backplane 1. The first adhesive layer 8 can be a pressure-sensitive adhesive (PSA).

[0125] In an exemplary embodiment, the display substrate of the disclosed embodiment further includes a second adhesive layer 9. The second adhesive layer 9 is located in the first display area A1, the second display area A2, and the third display area A3. The second adhesive layer 9 is laminated between the cover plate 5 and the second polarizing structure 4. The second adhesive layer 9 is used to bond the cover plate 5 to the second polarizing structure 4. The second adhesive layer 9 can be an optical adhesive (OCA).

[0126] In an exemplary embodiment, Figure 2A As shown, the display substrate of the embodiment of the present disclosure further includes a second reflective interface 31. The second reflective interface 31 is located in the first display area A1, the second display area A2, and the third display area A3, and is located at least on the side of the second polarizing structure 4 away from the substrate 2. For example, the second reflective interface 31 is formed at the interface between the side of the cover plate 5 of the display substrate of the embodiment of the present disclosure away from the substrate 2 and the outer side of the display substrate.

[0127] In an exemplary embodiment, Figure 2A As shown, the second reflective interface 31 converts the light emitted by the at least one first light-emitting element 21 into a reflected light. For example, the light emitted by the at least one first light-emitting element 21 is totally reflected at the second reflective interface 31, forming the reflected light that is emitted toward the second polarizing structure 4. The second polarizing structure 4 is configured to transmit the reflected light, convert the transmitted reflected light into a first circularly polarized light, and emit at least a portion of the first circularly polarized light toward the first reflective interface 32. The first reflective interface 32 converts the incident first circularly polarized light into a second circularly polarized light, and reflects at least a portion of the second circularly polarized light, so that at least a portion of the second circularly polarized light is emitted toward the first polarizing structure 6. The first polarization structure 6 is configured to block the transmission of the incident second circularly polarized light, thereby blocking the second circularly polarized light from being emitted to the first pixel circuit, the second pixel circuit 11 in the second display area A2 and the third pixel circuit 12 in the third display area A3, preventing the light emitted by the first light-emitting element 21 from being reflected by the internal film layer of the display substrate and incident on the pixel circuit in the display substrate, thereby avoiding characteristic deviation of the pixel circuit in the display substrate, improving the generation of dark rings and other undesirable phenomena on the display substrate, and enhancing the display effect.

[0128] In an exemplary embodiment, Figure 2A As shown, the optical path of light in the display substrate of the embodiment of the present disclosure is as follows: the first light-emitting element 21 emits light, a portion of the light is emitted from the display substrate for displaying an image, and a portion of the light is totally reflected at the second reflective interface 31 to form a reflected light emitted toward the second polarizing structure 4; the reflected light is emitted to the second polarizing structure 4, and the second polarizing structure 4 transmits at least a portion of the reflected light, converting the transmitted reflected light into a first circularly polarized light, and emits at least a portion of the first circularly polarized light toward the first reflective interface 32; at least a portion of the first circularly polarized light is emitted to the first reflective interface 32, and is totally reflected at the first reflective interface 32 to form a second circularly polarized light emitted toward the first polarizing structure 6, the second circularly polarized light is blocked at the first polarizing structure 6 and cannot be transmitted through the first polarizing structure 6, thereby preventing the second circularly polarized light from being emitted to the first pixel circuit and the second pixel circuit 11 in the second display area A2 and the third pixel circuit 12 in the third display area A3, thereby preventing the pixel circuits in the display substrate from shifting in characteristics, improving undesirable phenomena such as dark rings generated on the display substrate, and enhancing the display effect.

[0129] In an exemplary embodiment, Figure 2A As shown, the orthographic projections of the second polarizing structure 4 on the substrate 2 overlap with the orthographic projections of the multiple first light-emitting elements 21 on the substrate 2, the orthographic projections of the multiple second light-emitting elements 22 on the substrate 2, and the orthographic projections of the multiple third light-emitting elements 23 on the substrate 2, and at least part of the second polarizing structure 4 covers the multiple first light-emitting elements 21, the multiple second light-emitting elements 22, and the multiple third light-emitting elements 23.

[0130] In some embodiments, the second polarizing structure may be located only in the first display area A1, and not in the second display area A2 and the third display area A3. The orthographic projection of the second polarizing structure on the substrate 2 overlaps with the orthographic projections of the plurality of first light-emitting elements 21 on the substrate 2, but does not overlap with the orthographic projections of the plurality of second light-emitting elements 22 on the substrate 2 or the orthographic projections of the plurality of third light-emitting elements 23 on the substrate 2.

[0131] In an exemplary embodiment, Figure 2A As shown, the second polarizing structure 4 includes a second retardation film layer 401 and a second linear polarizing film layer 402, which are stacked. The second retardation film layer 401 is located on the side of the second linear polarizing film layer 402 closer to the substrate 2. The second linear polarizing film layer 402 is configured to transmit reflected light and convert the transmitted reflected light into a first linearly polarized light. The second retardation film layer 401 is configured to transmit the first linearly polarized light and convert the transmitted first linearly polarized light into a first circularly polarized light. In some embodiments, the second retardation film layer is configured to transmit the first linearly polarized light and convert the transmitted first linearly polarized light into a first elliptically polarized light. However, this embodiment is not limited to this.

[0132] In an exemplary embodiment, Figure 2A As shown, the orthographic projection of the first polarizing structure 6 on the substrate 2 overlaps with the orthographic projections of the multiple second light-emitting elements 22 on the substrate 2 and the orthographic projections of the multiple third light-emitting elements 23 on the substrate 2, but does not overlap with the orthographic projections of the multiple first light-emitting elements 21 on the substrate 2.

[0133] In an exemplary embodiment, Figure 2A As shown, the first polarizing structure 6 includes a first phase difference film layer 601 and a first linear polarizing film layer 602 which are stacked. The first linear polarizing film layer 602 is located on the side of the first phase difference film layer 601 close to the substrate 2. The first phase difference film layer 601 is configured to transmit the second circularly polarized light and form the transmitted second circularly polarized light into a second linear polarized light. The first linear polarizing film layer 602 is configured to block the transmission of the incident second linear polarized light.

[0134] In an exemplary embodiment, the light vectors of the first circularly polarized light and the second circularly polarized light rotate in opposite directions. For example, the first circularly polarized light may be left-handed circularly polarized light, and the second circularly polarized light may be right-handed circularly polarized light; or the first circularly polarized light may be right-handed circularly polarized light, and the second circularly polarized light may be left-handed circularly polarized light. However, this embodiment is not limited to this.

[0135] In an exemplary embodiment, the polarization direction of the second linearly polarized light is perpendicular to the polarization direction of the first linear polarizing film layer 602, so that the second linearly polarized light cannot pass through the first linear polarizing film layer 602, and the first polarizing structure 6 prevents the second circularly polarized light from being emitted to the first pixel circuit and the second pixel circuit 11 in the second display area A2 and the third pixel circuit 12 in the third display area A3, thereby avoiding characteristic deviation of the pixel circuits in the display substrate.

[0136] In an exemplary embodiment, the angle between the transmission axis of the second retardation film layer 401 in the second polarizing structure 4 and the plane of the display substrate may be -5 degrees to 5 degrees. For example, the angle between the transmission axis of the second retardation film layer 401 and the plane of the display substrate may be 0 degrees.

[0137] In an exemplary embodiment, the angle between the transmission axis of the first phase difference film layer 601 in the first polarizing structure 6 and the plane where the display substrate is located can be -5 degrees to 5 degrees. For example, the angle between the transmission axis of the first phase difference film layer 601 and the plane where the display substrate is located can be 0 degrees.

[0138] In an exemplary embodiment, the angle between the transmission axis of the second retardation film layer 401 and the plane of the display substrate can be the same as the angle between the transmission axis of the first retardation film layer 601 and the plane of the display substrate. For example, the angle between the transmission axis of the second retardation film layer 401 and the plane of the display substrate and the angle between the transmission axis of the first retardation film layer 601 and the plane of the display substrate can both be 0 degrees. However, this embodiment is not limited to this. In some embodiments, the angle between the transmission axis of the second retardation film layer and the plane of the display substrate and the angle between the transmission axis of the first retardation film layer and the plane of the display substrate can also be different.

[0139] In an exemplary embodiment, the phase difference of the second retardation film layer 401 in the second polarizing structure 4 can be 60 nanometers to 450 nanometers. For example, the phase difference of the second retardation film layer 401 in the second polarizing structure 4 can be 68.75 nanometers, 137.5 nanometers, 206.25 nanometers, or 412.5 nanometers. However, this embodiment is not limited to this.

[0140] In an exemplary embodiment, the phase difference of the first phase difference film layer 601 in the first polarizing structure 6 can be 60 nanometers to 450 nanometers. For example, the phase difference of the first phase difference film layer 601 in the first polarizing structure 6 can be 68.75 nanometers, 137.5 nanometers, 206.25 nanometers, or 412.5 nanometers. However, this embodiment is not limited to this.

[0141] In an exemplary embodiment, the second phase difference film layer 401 may be a quarter-wave plate. The angle between the transmission axis direction of the second linear polarizing film layer 402 in the second polarizing structure 4 and the fast axis of the second phase difference film layer 401 may be 40 to 50 degrees; or 130 to 140 degrees. For example, the angle between the transmission axis direction of the second linear polarizing film layer 402 and the fast axis of the second phase difference film layer 401 may be 45 degrees or 135 degrees. In some embodiments, the second phase difference film layer may be a half-wave plate. However, this embodiment does not limit this. The fast axis refers to the direction of the light vector with a fast propagation speed.

[0142] In an exemplary embodiment, the first phase difference film layer 601 may be a quarter-wave plate. The angle between the transmission axis of the first linear polarizing film layer 602 in the first polarizing structure 6 and the fast axis of the first phase difference film layer 601 may be 40 to 50 degrees, or 130 to 140 degrees. For example, the angle between the transmission axis of the first linear polarizing film layer 602 and the fast axis of the first phase difference film layer 601 may be 45 or 135 degrees. In some embodiments, the first phase difference film layer may be a half-wave plate. However, this embodiment is not limited to this.

[0143] Figure 6Schematic diagram of the light path in the display substrate of the embodiment of the present disclosure. In the exemplary embodiment, the transmission axis of the second phase difference film layer 401 and the transmission axis of the first phase difference film layer 601 are both 0 degrees, the phase difference of the second phase difference film layer 401 is 137.5 nanometers, the angle between the transmission axis direction of the second linear polarizing film layer 402 and the fast axis of the second phase difference film layer 401 is 45 degrees, the phase difference of the first phase difference film layer 601 is 137.5 nanometers, and the angle between the transmission axis direction of the first linear polarizing film layer 602 and the fast axis of the first phase difference film layer 601 is 45 degrees as an example to illustrate the light path in the display substrate of the embodiment of the present disclosure. Figure 6 As shown, when the first light-emitting element 21 in the first display area A1 emits light, part of the light is emitted from the display substrate for displaying an image, and part of the light is totally reflected at the second reflective interface 31 formed at the junction of the cover plate 5 away from the light-emitting element and the outer side of the display substrate, forming a reflected light b emitted toward the second polarizing structure 4; after the reflected light b passes through the second linear polarizing film layer 402, it forms a first linearly polarized light c with an angle of 45° with the fast axis of the second phase difference film layer 401. The first linearly polarized light c passes through the second phase difference film layer 401 to form a left-handed first circularly polarized light d, and at least part of the first circularly polarized light d is left-handed. Light d is emitted toward the first reflective interface 32. At least a portion of the first circularly polarized light d is emitted to the first reflective interface 32 and is totally reflected at the first reflective interface 32, forming a right-handed second circularly polarized light e. After the second circularly polarized light e passes through the first phase difference film layer 601, it forms a second linearly polarized light f with an angle of 135° with the fast axis of the first phase difference film layer 601. The polarization direction of the second linearly polarized light f is perpendicular to the transmission axis direction of the first linear polarizing film layer 602, preventing the second linearly polarized light f from passing through the first linear polarizing film layer 602. As a result, the second circularly polarized light e is blocked by the first polarizing structure 6.

[0144] In an exemplary embodiment, the optical path of light in a display substrate according to an embodiment of the present disclosure is described by taking as an example a case where the transmission axis of the second retardation film layer 401 and the transmission axis of the first retardation film layer 601 are both 0 degrees, the phase difference of the second retardation film layer 401 is 137.5 nanometers, the angle between the transmission axis of the second linear polarizing film layer 402 and the fast axis of the second retardation film layer 401 is 45 degrees, the phase difference of the first retardation film layer 601 is 412.5 nanometers, and the angle between the transmission axis of the first linear polarizing film layer 602 and the fast axis of the first retardation film layer 601 is 135 degrees. When the first light-emitting element 21 in the first display area A1 emits light, part of the light is emitted from the display substrate for displaying an image, and part of the light is totally reflected at the second reflective interface 31 formed at the junction of the cover plate 5 away from the light-emitting element and the outer side of the display substrate, forming a reflected light emitted toward the second polarizing structure 4; after the reflected light passes through the second linear polarizing film layer 402, it forms a first linearly polarized light with an angle of 45° with the fast axis of the second phase difference film layer 401. The first linearly polarized light passes through the second phase difference film layer 401 to form a left-handed first circularly polarized light, and at least part of the first circularly polarized light is left-handed. The light is emitted toward the first reflective interface 32; at least a portion of the first circularly polarized light is emitted to the first reflective interface 32 and is totally reflected at the first reflective interface 32, forming a right-handed second circularly polarized light. After the second circularly polarized light passes through the first phase difference film layer 601, it forms a second linearly polarized light with an angle of 45° with the fast axis of the first phase difference film layer 601. The polarization direction of the second linearly polarized light is perpendicular to the transmission axis direction of the first linear polarizing film layer 602, preventing the second linearly polarized light from passing through the first linear polarizing film layer 602, thereby causing the second circularly polarized light to be blocked by the first polarizing structure 6.

[0145] In an exemplary embodiment, the display substrate of the disclosed embodiment further includes a composite film 10. The composite film 10 is located in the second display area A2 and the third display area A3. That is, the orthographic projection of the composite film 10 on the substrate 2 does not overlap with the first display area A1, but overlaps with the second display area A2 and the third display area A3. The composite film 10 is laminated on the side of the backplane 1 away from the substrate 2. The orthographic projection of the composite film 10 on the substrate 2 does not overlap with the first display area A1, thereby preventing the composite film 10 from reducing the light transmittance of the first display area A1.

[0146] In an exemplary embodiment, the composite film 10 can be a super clean foam (SCF) composite film. The composite film 10 generally includes an adhesive layer, a buffer layer, and a heat dissipation layer stacked sequentially in a direction away from the backplane 1. The composite film 10 can buffer stress acting on the display substrate and dissipate heat generated by the display substrate during operation, providing a certain degree of protection for the display substrate.

[0147] Figure 2BFIG. 1 is another cross-sectional view of a display substrate according to an embodiment of the present disclosure. Figure 2B As shown, in a plane perpendicular to the display substrate, the first display area A1 may include: a backplane 1, a first polarizing structure 6 disposed on the backplane 1, a substrate 2 disposed on the side of the first polarizing structure 6 away from the backplane 1, a plurality of first light-emitting elements 21 disposed on the side of the substrate 2 away from the backplane 1, an encapsulation layer 3 disposed on the side of the plurality of first light-emitting elements 21 away from the backplane 1, a second polarizing structure 4 disposed on the side of the encapsulation layer 3 away from the backplane 1, and a cover plate 5 disposed on the side of the second polarizing structure 4 away from the backplane 1. The first display area A1 does not include a pixel circuit layer, the orthographic projection of the first phase difference film layer 601 in the first polarizing structure 6 on the substrate overlaps with the first display area A1, and the orthographic projection of the first linear polarizing film layer 602 in the first polarizing structure 6 on the substrate does not overlap with the first display area A1, thereby preventing the first linear polarizing film layer 602 from reducing the light transmittance of the first display area A1.

[0148] like Figure 2B As shown, in a plane perpendicular to the display substrate, the second display area A2 may include: a backplane 1, a first polarizing structure 6 disposed on the backplane 1, a substrate 2 disposed on the side of the first polarizing structure 6 away from the backplane 1, a pixel circuit layer disposed on the side of the substrate 2 away from the backplane 1, a plurality of second light-emitting elements 22 disposed on the side of the pixel circuit layer away from the backplane 1, an encapsulation layer 3 disposed on the side of the plurality of second light-emitting elements 22 away from the backplane 1, a second polarizing structure 4 disposed on the side of the encapsulation layer 3 away from the backplane 1, and a cover plate 5 disposed on the side of the second polarizing structure 4 away from the backplane 1. The pixel circuit layer includes a plurality of first pixel circuits and a plurality of second pixel circuits 11. The second display area A2 is provided with a pixel circuit layer and a first polarizing structure.

[0149] like Figure 2B As shown, in a plane perpendicular to the display substrate, the third display area A3 may include: a backplane 1, a first polarizing structure 6 disposed on the backplane 1, a substrate 2 disposed on the side of the first polarizing structure 6 away from the backplane 1, a pixel circuit layer disposed on the side of the substrate 2 away from the backplane 1, a routing layer disposed on the side of the pixel circuit layer away from the backplane 1, a plurality of third light-emitting elements 23 disposed on the side of the routing layer away from the backplane 1, an encapsulation layer 3 disposed on the side of the plurality of third light-emitting elements 23 away from the backplane 1, a second polarizing structure 4 disposed on the side of the encapsulation layer 3 away from the backplane 1, and a cover plate 5 disposed on the side of the second polarizing structure 4 away from the backplane 1. The pixel circuit layer includes a plurality of third pixel circuits 12. The routing layer includes a plurality of signal routing lines 7. The third display area A3 is provided with a pixel circuit layer, a routing layer, and a first polarizing structure 6.

[0150] In an exemplary embodiment, Figure 2BAs shown, in a plane perpendicular to the display substrate, the first display area A1 is not provided with a pixel circuit layer or a wiring layer. The first phase difference film layer 601 of the first polarization structure 6 is located in the first display area A1, and the first linear polarization film layer 602 of the first polarization structure 6 is not located in the first display area A1. The second display area A2 is provided with a pixel circuit layer and a first polarization structure, but no wiring layer. The third display area A3 is provided with a pixel circuit layer, a wiring layer, and a first polarization structure.

[0151] In an exemplary embodiment, the optical path of light in a display substrate according to an embodiment of the present disclosure is described by taking as an example a case where the transmission axis of the second retardation film layer 401 and the transmission axis of the first retardation film layer 601 are both 0 degrees, the phase difference of the second retardation film layer 401 is 137.5 nanometers, the angle between the transmission axis of the second linear polarizing film layer 402 and the fast axis of the second retardation film layer 401 is 45 degrees, the phase difference of the first retardation film layer 601 is 68.75 nanometers, and the angle between the transmission axis of the first linear polarizing film layer 602 and the fast axis of the first retardation film layer 601 is 45 degrees. When the first light-emitting element 21 in the first display area A1 emits light, part of the light is emitted from the display substrate for displaying an image, and part of the light is totally reflected at the second reflective interface 31 formed at the junction of the cover plate 5 away from the light-emitting element and the outer side of the display substrate, forming a reflected light emitted toward the second polarizing structure 4; after the reflected light passes through the second linear polarizing film layer 402, it forms a first linearly polarized light with an angle of 45° with the fast axis of the second phase difference film layer 401. The first linearly polarized light passes through the second phase difference film layer 401 to form a left-handed first circularly polarized light, and at least part of the first circularly polarized light is left-handed. The light is emitted toward the first reflective interface 32; at least a portion of the first circularly polarized light is emitted to the first reflective interface 32 and is totally reflected at the first reflective interface 32, forming a right-handed second circularly polarized light. After the second circularly polarized light passes through the first phase difference film layer 601, it forms a second linearly polarized light with an angle of 135° with the fast axis of the first phase difference film layer 601. The polarization direction of the second linearly polarized light is perpendicular to the transmission axis direction of the first linear polarizing film layer 602, preventing the second linearly polarized light from passing through the first linear polarizing film layer 602, thereby causing the second circularly polarized light to be blocked by the first polarizing structure 6.

[0152] In an exemplary embodiment, the optical path of light in a display substrate according to an embodiment of the present disclosure is described by taking as an example a case where the transmission axis of the second retardation film layer 401 and the transmission axis of the first retardation film layer 601 are both 0 degrees, the phase difference of the second retardation film layer 401 is 137.5 nanometers, the angle between the transmission axis of the second linear polarizing film layer 402 and the fast axis of the second retardation film layer 401 is 45 degrees, the phase difference of the first retardation film layer 601 is 206.25 nanometers, and the angle between the transmission axis of the first linear polarizing film layer 602 and the fast axis of the first retardation film layer 601 is 135 degrees. When the first light-emitting element 21 in the first display area A1 emits light, part of the light is emitted from the display substrate for displaying an image, and part of the light is totally reflected at the second reflective interface 31 formed at the junction of the cover plate 5 away from the light-emitting element and the outer side of the display substrate, forming a reflected light emitted toward the second polarizing structure 4; after the reflected light passes through the second linear polarizing film layer 402, it forms a first linearly polarized light with an angle of 45° with the fast axis of the second phase difference film layer 401. The first linearly polarized light passes through the second phase difference film layer 401 to form a left-handed first circularly polarized light, and at least part of the first circularly polarized light is left-handed. The light is emitted toward the first reflective interface 32; at least a portion of the first circularly polarized light is emitted to the first reflective interface 32 and is totally reflected at the first reflective interface 32, forming a right-handed second circularly polarized light. After the second circularly polarized light passes through the first phase difference film layer 601, it forms a second linearly polarized light with an angle of 45° with the fast axis of the first phase difference film layer 601. The polarization direction of the second linearly polarized light is perpendicular to the transmission axis direction of the first linear polarizing film layer 602, preventing the second linearly polarized light from passing through the first linear polarizing film layer 602, thereby causing the second circularly polarized light to be blocked by the first polarizing structure 6.

[0153] Figure 3 Schematic diagram of a display device according to an embodiment of the present disclosure. Figure 3 As shown, the present disclosure provides a display device, comprising: a display substrate 100 and a light sensor 200 located on a light-emitting side away from the display substrate 100. The orthographic projection of the light sensor 200 on the display substrate 100 overlaps with the first display area A1 of the display substrate.

[0154] In some examples, the display substrate 100 may be a flexible OLED display substrate, a QLED display substrate, a Micro-LED display substrate, or a Mini-LED display substrate. The display device may be any product or component with a display function, such as an OLED display, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, or a navigation system, although the embodiments of the present disclosure are not limited thereto.

[0155] The present disclosure provides a method for preparing a display substrate. The display substrate may be any of the display substrates described above, and the display substrate includes a first display area and a second display area, wherein the second display area is located on at least one side of the first display area, and the first display area is an under-screen sensing area. The method for preparing the display substrate includes:

[0156] forming a substrate at least in the first display area and the second display area;

[0157] forming a pixel circuit layer on the substrate at least in the second display area;

[0158] A first reflective interface is formed at least on a side of the substrate away from the pixel circuit layer, and the first reflective interface is located at least in the first display area and the second display area; the first reflective interface reflects at least part of the light toward the pixel circuit layer;

[0159] A first polarizing structure is formed at least between the substrate and the first reflective interface, and at least a portion of the first polarizing structure is located in the second display area. The first polarizing structure is configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

[0160] Although the embodiments disclosed in this disclosure are as described above, the contents described are merely embodiments adopted to facilitate understanding of the disclosure and are not intended to limit the present invention. Any person skilled in the art may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope of the disclosure. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.

[0161] The drawings in this disclosure only relate to the structures involved in this disclosure, and other structures may refer to general designs. In the absence of conflict, the embodiments of this disclosure, that is, the features in the embodiments, may be combined with each other to obtain new embodiments.

[0162] It should be understood by those skilled in the art that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be included in the scope of the claims of the present disclosure.

Claims

1. A display substrate comprising a first display area and a second display area, wherein the second display area is located on at least one side of the first display area, and the first display area is an under-screen sensing area; the display substrate comprises at least: a substrate, located at least in the first display area and the second display area; a pixel circuit layer, at least a portion of which is located in the second display area and on one side of the substrate; a first reflective interface, located at least in the first display area and the second display area, and located on a side of the substrate away from the pixel circuit layer; the first reflective interface reflects at least part of the light toward the pixel circuit layer; a first polarizing structure, at least a portion of the first polarizing structure is located in the second display area, and at least a portion of the first polarizing structure is located between the substrate and the first reflective interface, and the first polarizing structure is configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

2. The display substrate according to claim 1, further comprising a third display area, wherein the third display area is located on at least one side of the first display area and the second display area, at least part of the pixel circuit layer is located in the third display area, and at least part of the first polarization structure is located in the third display area.

3. The display substrate according to claim 1, further comprising: a plurality of first light-emitting elements, located in the first display area and on a side of the substrate away from the first reflective interface; a second reflective interface located at least in the first display area and the second display area, and at least on a side of the plurality of first light-emitting elements away from the substrate, wherein the second reflective interface reflects light emitted by at least one first light-emitting element; a second polarizing structure, located at least in the first display area and the second display area, and at least between the plurality of first light-emitting elements and the second reflective interface, the second polarizing structure being configured to transmit the reflected light, so that the transmitted reflected light forms a first circularly polarized light, and emit the first circularly polarized light toward the first reflective interface; The first reflective interface is configured to convert the incident first circularly polarized light into a second circularly polarized light and reflect at least a portion of the second circularly polarized light to the first polarization structure; the first polarization structure is configured to block the second circularly polarized light from entering the pixel circuit layer.

4. The display substrate according to claim 3, wherein: The second polarizing structure includes a second linear polarizing film layer and a second phase difference film layer that are stacked together. The second phase difference film layer is located on the side of the second linear polarizing film layer close to the substrate. The second linear polarizing film layer is configured to transmit the reflected light and form the transmitted reflected light into a first linear polarized light. The second phase difference film layer is configured to transmit the first linear polarized light and form the transmitted first linear polarized light into the first circularly polarized light.

5. The display substrate according to claim 3, wherein: The first polarizing structure includes a first linear polarizing film layer and a first phase difference film layer that are stacked. The first phase difference film layer is located on the side of the first linear polarizing film layer close to the substrate. The first phase difference film layer is configured to transmit the second circularly polarized light and form the transmitted second circularly polarized light into a second linear polarized light. The first linear polarizing film layer is configured to block the transmission of the incident second linear polarized light. The display substrate according to claim 5 , wherein: The polarization direction of the second linearly polarized light is perpendicular to the polarization direction of the first linear polarizing film layer.

7. The display substrate according to claim 5, wherein: The orthographic projection of the first linear polarizing film layer on the substrate does not overlap with the first display area, and at least a portion of the orthographic projection of the first phase difference film layer on the substrate overlaps with the first display area.

8. The display substrate according to any one of claims 1 to 6, wherein: The orthographic projection of the first polarizing structure on the substrate does not overlap with the first display area.

9. The display substrate according to any one of claims 1 to 7, further comprising: A backplane, the backplane is located at least in the first display area and the second display area, and the backplane is located at least on the side of the first polarizing structure away from the substrate, and the junction between the surface of the backplane away from the substrate and the outer side of the display substrate forms the first reflective interface.

10. The display substrate according to claim 9, further comprising: The composite film is at least located in the second display area, the composite film is at least located on the side of the backplane away from the substrate, and the orthographic projection of the composite film on the substrate does not overlap with the first display area.

11. The display substrate according to claim 3, further comprising: A cover plate is located at least in the first display area and the second display area, the cover plate is located on the side of the second polarizing structure away from the base, and the junction between the surface of the cover plate away from the base and the outer side of the display substrate forms the second reflective interface.

12. The display substrate according to any one of claims 1 to 7, further comprising: An encapsulation layer is located at least in the first display area and the second display area, and is located on a side of the pixel circuit layer away from the substrate.

13. The display substrate according to claim 3, further comprising: Multiple second light-emitting elements, the pixel circuit layer includes multiple first pixel circuits and multiple second pixel circuits, the multiple second light-emitting elements, the multiple first pixel circuits and the multiple second pixel circuits are all located in the second display area, the multiple second light-emitting elements are located on the side of the pixel circuit layer away from the substrate, the first pixel circuit is electrically connected to the first light-emitting element, and the second pixel circuit is electrically connected to the second light-emitting element.

14. The display substrate according to claim 13, wherein: The spacing between the first light-emitting elements is greater than the spacing between the second light-emitting elements; and / or the area of ​​the first light-emitting element is smaller than the area of ​​the second light-emitting element.

15. The display substrate according to claim 13, wherein: The second display area has three or four second light-emitting elements arranged in a direction away from the first display area.

16. The display substrate according to claim 15, wherein: The orthographic projection of the first polarizing structure on the substrate overlaps with the orthographic projection of the three or four second light-emitting elements on the substrate. 17 . The display substrate according to claim 1 , further comprising a light absorbing layer, wherein the light absorbing layer is located at least in the first display area and the second display area, and the light absorbing layer is stacked between the first polarizing structure and the first reflective interface.

18. The display substrate according to any one of claims 1 to 7, further comprising a light-shielding layer, wherein the light-shielding layer is located in the second display area, the orthographic projection of the light-shielding layer on the substrate does not overlap with the first display area, and the light-shielding layer is stacked on the side of the pixel circuit layer close to the substrate.

19. A display device comprising the display substrate according to any one of claims 1 to 18 and a photosensor, wherein the photosensor is located on a side away from the light-emitting side of the display substrate, and an orthographic projection of the photosensor on the display substrate overlaps with a first display area in the display substrate.

20. A method for preparing a display substrate, the display substrate comprising a first display area and a second display area, the second display area being located on at least one side of the first display area, the first display area being an under-screen sensing area; The method for preparing the display substrate includes: forming a substrate at least in the first display area and the second display area; forming a pixel circuit layer on the substrate at least in the second display area; A first reflective interface is formed at least on a side of the substrate away from the pixel circuit layer, and the first reflective interface is located at least in the first display area and the second display area; the first reflective interface reflects at least part of the light toward the pixel circuit layer; A first polarizing structure is formed at least between the substrate and the first reflective interface, and at least a portion of the first polarizing structure is located in the second display area. The first polarizing structure is configured to block light reflected by the first reflective interface from entering the pixel circuit layer.

Images