Display substrate and display device

Abstract

The utility model provides a display substrate and a display device. The display substrate comprises a first display area and a second display area. The display substrate comprises a substrate body, a light-emitting structure layer located on the substrate body, a first insulating layer located on the side, away from the substrate body, of the light-emitting structure layer and a shading layer located on the side, away from the substrate body, of the first insulating layer. The light-emitting structure layer comprises a plurality of sub-pixels which are arranged at intervals. The first insulating layer is provided with a plurality of holes, and the orthographic projection of each hole on the substrate covers the orthographic projection of the light-emitting area of one sub-pixel on the substrate; the plurality of open holes comprise a plurality of first open holes positioned in the first display area and a plurality of second open holes positioned in the second display area; and the depth of the first opening is greater than that of the second opening. The shading layer is provided with a plurality of through holes, and the orthographic projection of each through hole on the substrate covers the orthographic projection of one open hole on the substrate.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display substrate and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) has advantages such as self-illumination, high efficiency, vivid colors, thinness and energy saving, and wide operating temperature range, and has been gradually applied to large-area displays, lighting and automotive displays. Utility Model Content

[0003] This application provides a display substrate and a display device.

[0004] According to a first aspect of the present application, a display substrate is provided. The display substrate includes a first display area and a second display area; the display substrate includes:

[0005] Substrate;

[0006] A light-emitting structure layer located on the substrate, the light-emitting structure layer comprising a plurality of spaced sub-pixels;

[0007] A first insulating layer is located on the side of the light-emitting structure layer away from the substrate. The first insulating layer has a plurality of openings, and the orthographic projection of each opening on the substrate covers the orthographic projection of the light-emitting area of ​​a sub-pixel on the substrate. The plurality of openings includes a plurality of first openings located in the first display area and a plurality of second openings located in the second display area. The depth of the first openings is greater than the depth of the second openings.

[0008] A light-shielding layer is located on the side of the first insulating layer away from the substrate. The light-shielding layer has a plurality of through holes, and the orthogonal projection of each of the through holes on the substrate covers the orthogonal projection of one of the openings on the substrate.

[0009] In one embodiment, the display substrate further includes a pixel defining layer located between the substrate and the first insulating layer, the pixel defining layer having a plurality of pixel openings, each of the sub-pixels being at least partially located within one of the pixel openings, the pixel openings defining the light-emitting area of ​​the sub-pixel; the orthographic projection of each of the openings on the substrate covers the orthographic projection of one of the pixel openings on the substrate;

[0010] The distance between the edge of the first opening facing the orthographic projection of the bottom surface of the substrate onto the substrate and the edge of the corresponding pixel opening facing the orthographic projection of the bottom surface of the substrate onto the substrate is a first distance; the distance between the edge of the second opening facing the orthographic projection of the bottom surface of the substrate onto the substrate and the edge of the corresponding pixel opening facing the orthographic projection of the bottom surface of the substrate onto the substrate is a second distance; the light-emitting structure layer includes at least three sub-pixels with different light-emitting colors; the second distance corresponding to the pixel opening of the sub-pixel located in the second display area is less than the first distance corresponding to the pixel opening of the sub-pixel with the same light-emitting color located in the first display area.

[0011] In one embodiment, the display substrate further includes a second insulating layer, wherein the refractive index of the first insulating layer is less than the refractive index of the second insulating layer; and each of the openings is filled by the second insulating layer.

[0012] In one embodiment, the slope angle of the side of the first opening is greater than the slope angle of the side of the second opening.

[0013] In one embodiment, the display substrate further includes a color filter layer located on the side of the light-emitting structure layer away from the substrate, the color filter layer including a plurality of color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of the light-emitting area of ​​a sub-pixel on the substrate; the color filter layer is reused as the second insulating layer.

[0014] In one embodiment, the refractive index of the first insulating layer is in the range of 1.4 to 1.55, and the refractive index of the second insulating layer is in the range of 1.6 to 1.7.

[0015] In one embodiment, the first insulating layer includes a first insulating portion located in the first display area and a second insulating portion located in the second display area, wherein the thickness of the first insulating portion is greater than the thickness of the second insulating portion; the first opening penetrates the first insulating portion, and the second opening penetrates the second insulating portion.

[0016] In one embodiment, the surface of the first insulating portion facing the substrate and the surface of the second insulating portion facing the substrate are substantially in the same plane; the first insulating layer further includes a connecting portion located between the first insulating portion and the second insulating portion, the surface of the connecting portion away from the substrate being inclined, and the inclined surface being connected to the surface of the first insulating portion away from the substrate and the surface of the second insulating portion away from the substrate, respectively.

[0017] In one embodiment, both edges of the orthographic projection of the inclined plane onto the substrate are curved.

[0018] In one embodiment, both edges of the orthographic projection of the inclined plane onto the substrate are wavy.

[0019] In one embodiment, the display substrate further includes a pad layer located on the side of the second insulating portion facing the substrate; the surface of the first insulating portion away from the substrate and the surface of the second insulating portion away from the substrate are in the same plane.

[0020] In one embodiment, the padding layer and the first insulating layer are an integral structure.

[0021] In one embodiment, the difference between the depth of the first opening and the depth of the second opening ranges from 0.2 μm to 0.6 μm.

[0022] In one embodiment, the display substrate further includes a touch structure layer located between the light-emitting structure layer and the light-shielding layer. The touch structure layer includes a first touch electrode layer, a second touch electrode layer located on the side of the first touch electrode layer away from the substrate, an insulating material layer located between the first touch electrode layer and the second touch electrode layer, and an insulating protective layer on the side of the second touch electrode layer away from the substrate; the first insulating layer is reused as the insulating protective layer.

[0023] According to a second aspect of the embodiments of this application, a display substrate is provided, the display substrate including a first display area and a second display area; the display substrate includes:

[0024] Substrate;

[0025] A light-emitting structure layer is located on the substrate, the light-emitting structure layer comprising a plurality of spaced sub-pixels; the light-emitting structure layer comprises at least three sub-pixels with different emission colors;

[0026] A pixel defining layer is located on the same side of the substrate as the light-emitting structure layer; the pixel defining layer has a plurality of pixel openings, and each sub-pixel is at least partially located within one of the pixel openings, the pixel opening defining the light-emitting area of ​​the sub-pixel;

[0027] A first insulating layer is located on the side of the light-emitting structure layer away from the substrate. The first insulating layer has multiple openings. The multiple openings include multiple first openings located in the first display area and multiple second openings located in the second display area. The orthographic projection of each opening on the substrate covers the orthographic projection of a pixel opening on the substrate. The distance between the edge of the orthographic projection of the bottom surface of the first opening onto the substrate and the edge of the orthographic projection of the corresponding pixel opening onto the substrate is a third distance. The distance between the edge of the orthographic projection of the bottom surface of the second opening onto the substrate and the edge of the orthographic projection of the corresponding pixel opening onto the substrate is a fourth distance. The fourth distance corresponding to the pixel opening of the sub-pixel located in the second display area is greater than the third distance corresponding to the pixel opening of the sub-pixel with the same emitting color located in the first display area.

[0028] A light-shielding layer is located on the side of the first insulating layer away from the substrate. The light-shielding layer has a plurality of through holes, and the orthogonal projection of each of the through holes on the substrate covers the orthogonal projection of one of the openings on the substrate.

[0029] In one embodiment, the display substrate further includes a second insulating layer, wherein the refractive index of the first insulating layer is less than the refractive index of the second insulating layer; and each of the openings is filled by the second insulating layer.

[0030] In one embodiment, the slope angle of the side of the first opening is greater than the slope angle of the side of the second opening.

[0031] In one embodiment, the display substrate further includes a color filter layer located on the side of the light-emitting structure layer away from the substrate, the color filter layer including a plurality of color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of the light-emitting area of ​​a sub-pixel on the substrate; the color filter layer is reused as the second insulating layer.

[0032] In one embodiment, the refractive index of the first insulating layer is in the range of 1.4 to 1.55, and the refractive index of the second insulating layer is in the range of 1.6 to 1.7.

[0033] In one embodiment, the depth of the first opening is greater than the depth of the second opening.

[0034] In one embodiment, the depth of the first opening is the same as the depth of the second opening.

[0035] In one embodiment, the display substrate further includes a touch structure layer located between the light-emitting structure layer and the light-shielding layer. The touch structure layer includes a first touch electrode layer, a second touch electrode layer located on the side of the first touch electrode layer away from the substrate, an insulating material layer located between the first touch electrode layer and the second touch electrode layer, and an insulating protective layer on the side of the second touch electrode layer away from the substrate; the first insulating layer is reused as the insulating protective layer.

[0036] According to a third aspect of the embodiments of this application, a display device is provided, the display device including the display substrate described above.

[0037] The display substrate and display device provided in this application embodiment can improve the phenomenon of alternating bright and dark stripes that appear on the display substrate in a non-display state, thereby enhancing the user experience. Attached Figure Description

[0038] Figure 1 This is a partial cross-sectional view of a display substrate provided in an exemplary embodiment of this application;

[0039] Figure 2 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0040] Figure 3 yes Figure 2 A magnified view of a portion of the structure shown;

[0041] Figure 4 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0042] Figure 5 yes Figure 4 A magnified view of a portion of the structure shown;

[0043] Figure 6 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0044] Figure 7 yes Figure 6 A magnified view of a portion of the structure shown;

[0045] Figure 8 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0046] Figure 9 yes Figure 8 A magnified view of a portion of the structure shown;

[0047] Figure 10 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0048] Figure 11 yes Figure 10 A magnified view of a portion of the structure shown;

[0049] Figure 12 yes Figure 4 and Figure 8 The diagram shows a top view of the first insulating layer in the display substrate.

[0050] Figure 13 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0051] Figure 14 yes Figure 13 A magnified view of a portion of the structure shown;

[0052] Figure 15 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0053] Figure 16 yes Figure 15 A magnified view of a portion of the structure shown;

[0054] Figure 17 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0055] Figure 18 yes Figure 17 A magnified view of a portion of the structure shown. Detailed Implementation

[0056] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0057] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0058] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0059] A display substrate such as Figure 1 As shown, the display substrate includes a first display area 101' and a second display area 102'; the display substrate includes a substrate 10', a light-emitting structure layer 20' located on the substrate 10', an insulating layer 70' located on the side of the light-emitting structure layer 20' away from the substrate 10', and a light-shielding layer 50' located on the side of the insulating layer 70' away from the substrate 10; the light-emitting structure layer 20' includes a plurality of sub-pixels 21'; the insulating layer 70' has a plurality of openings 71', and the light-shielding layer 50' has a plurality of through holes 51'; the orthographic projection of each opening 71' on the substrate 10' covers the orthographic projection of the light-emitting area of ​​one sub-pixel 21' on the substrate 10', and the orthographic projection of each through hole 51' on the substrate 10' covers the orthographic projection of one opening 71' on the substrate 10'. However, the display substrate exhibits alternating bright and dark stripes when not in display mode.

[0060] The inventors discovered that the above problems arose because of the preparation process. Figure 1In the process of forming the display substrate shown, after forming the insulating layer 70' with the opening 71', a light-shielding material layer is first formed on the entire surface, with the light-shielding material portion located within the opening 71'. The light-shielding material layer is then exposed and developed to obtain the light-shielding layer 50' with the through-hole 51'. After the light-shielding layer is exposed and developed, some light-shielding material remains within the opening 71'. To completely remove the light-shielding material within the opening 71', a cleaning device is typically used to rinse the display substrate with water to flush out the light-shielding material located within the opening 71'. However, due to the precision limitations of the cleaning equipment, the water pressure varies when rinsing different areas of the display substrate. Specifically, the water pressure when rinsing the second display area 102' is greater than that when rinsing the first display area 101'. This causes a portion of the bottom sidewall of the through-hole 51' in the second display area 102' to be washed away. Consequently, the bottom area of ​​the through-hole 51' corresponding to the sub-pixel in the second display area 102' is larger than the bottom area of ​​the through-hole 51' corresponding to the sub-pixel in the first display area 101' with the same luminous color. This results in an increased amount of ambient light incident on the second display area 102' being reflected by the anode of a single sub-pixel 21', which is greater than the amount of ambient light incident on the first display area 101' being reflected by the anode of sub-pixels 21' with the same luminous color. Consequently, the brightness of the second display area 102' is greater than that of the first display area 101' when the display substrate is not in display mode, causing the display substrate to display alternating bright and dark stripes, which affects the user experience.

[0061] This application provides a display substrate and a display device that can solve the above-mentioned technical problems. The display substrate and display device of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments can complement or combine with each other.

[0062] This application provides a display substrate. For example... Figure 2 and Figure 3 As shown, the display substrate includes a first display area 101 and a second display area 102. The display substrate includes a substrate 10, a light-emitting structure layer 20, a first insulating layer 70, and a light-shielding layer 50 located on the substrate 10. The substrate 10, the light-emitting structure layer 20, the first insulating layer 70, and the light-shielding layer 50 are all located in the first display area 101 and the second display area 102.

[0063] The light-emitting structure layer 20 is located on the substrate 10, and includes a plurality of spaced sub-pixels 21. A first display area 101 and a second display area 102 are each provided with a plurality of sub-pixels 21, and the pixel density of the sub-pixels 21 in the first display area 101 and the second display area 102 is the same. A first insulating layer 70 is located on the side of the light-emitting structure layer 20 away from the substrate 10, and the first insulating layer 70 has a plurality of openings 71. The orthographic projection of each opening 71 on the substrate 10 covers the orthographic projection of the light-emitting area of ​​one sub-pixel 21 on the substrate 10. The plurality of openings 71 includes a plurality of first openings 711 located in the first display area 101 and a plurality of second openings 712 located in the second display area 102. The depth h1 of the first opening 711 is greater than the depth h2 of the second opening 712. The depth of the opening 71 refers to its dimension in the film layer stacking direction of the display substrate. The light-shielding layer 50 is located on the side of the first insulating layer 70 away from the substrate 10. The light-shielding layer 50 is provided with a plurality of through holes 51, and the orthogonal projection of each through hole 51 on the substrate 10 covers the orthogonal projection of one of the openings 71 on the substrate 10.

[0064] The display substrate provided in this application embodiment has a depth h1 of the first opening 711 in the first display area 101 that is greater than the depth h2 of the second opening 712 in the second display area 102. After the light-shielding layer 50 is formed, when the light-shielding material remaining in the opening 71 is rinsed, the light-shielding material remaining in the second opening 712 is more easily flushed out of the second opening 712. This can appropriately reduce the water pressure of the rinsing equipment and prevent the bottom of the side wall of the through hole 51 in the first display area 101 from being washed away, thus avoiding the phenomenon of alternating bright and dark stripes appearing on the display substrate in the non-display state. This can improve the user experience.

[0065] It should be noted that when rinsing the light-shielding material remaining in the opening 71, the water pressure is generally set to be slightly higher to effectively ensure that all the remaining light-shielding material is flushed out. Experimental verification has shown that even after reducing the water pressure of the rinsing equipment, the light-shielding material remaining in the first opening 711 of the first display area 101 and the second opening 712 of the second display area 102 can still be flushed out.

[0066] In one embodiment, the substrate 10 can be a flexible substrate or a rigid substrate. The flexible substrate may be made of one or more of polyimide, polyethylene terephthalate, polycarbonate, and organic resin materials, including epoxy resin, triazine, silicone resin, or polyimide. The rigid substrate may include any one of glass substrates, quartz substrates, sapphire substrates, etc.

[0067] In one embodiment, such as Figure 2 As shown, the display substrate further includes a driving circuit layer 60 located between the substrate 10 and the light-emitting structure layer 20. The driving circuit layer 60 includes a plurality of pixel circuits, which are used to drive sub-pixels 21. The pixel circuits and sub-pixels 21 can correspond one-to-one, and each pixel circuit is used to drive the corresponding sub-pixel 21.

[0068] In one embodiment, such as Figure 2 As shown, the pixel circuit may include a thin-film transistor 61 and a capacitor 62. The thin-film transistor 61 may include an active layer 611, a gate 612, a first electrode 613, and a second electrode 614. One of the first electrode 613 and the second electrode 614 is the source, and the other is the drain. The capacitor 62 includes a first electrode plate 621 and a second electrode plate 622 disposed opposite to each other. The pixel circuit layer may also include multiple signal lines, such as scan signal lines, data signal lines, power signal lines, etc.

[0069] In one embodiment, such as Figure 2 As shown, the gate 612 and the first electrode 621 of the capacitor 62 are located on the same layer. The second electrode 622 of the capacitor 62 is located on the side of the first electrode 621 away from the substrate 10. The first electrode 613 and the second electrode 614 of the thin-film transistor 61 are located on the same layer, and the second electrode 622 is located on the side away from the substrate 10. The driving circuit layer 60 also includes a gate insulating layer 63 located between the active layer 611 and the gate 612, a capacitor insulating layer 64 located between the gate 612 and the second electrode 622, an interlayer dielectric layer 65 located between the second electrode 622 and the first electrode 613, and a planarization layer 66 located between the first electrode 613 and the light-emitting structure layer 20. The first electrode 613 and the second electrode 614 are in contact with the active layer 611 through vias penetrating the interlayer dielectric layer 65, the capacitor insulating layer 64, and the gate insulating layer 63, respectively. The description and figures here are illustrative of the thin-film transistor 61 as an LTPS type transistor. In other embodiments, the thin-film transistor 61 may be an LTPO type transistor, and the specific structure is not limited. In some embodiments, the driving circuit layer 60 further includes a transition structure located on the side of the planarization layer 66 away from the substrate 10 and a planarization film layer located on the side of the transition structure away from the substrate 10. The transition structure is electrically connected to the second electrode 614 through a through-hole penetrating the planarization layer 66.

[0070] In one embodiment, such as Figure 2As shown, some sub-pixels 21 are located in the first display area 101, and some sub-pixels 21 are located in the second display area 102. Each sub-pixel 21 includes a first electrode 211, a light-emitting material layer 212 located on the side of the first electrode 211 away from the substrate 10, and a second electrode 213 located on the side of the light-emitting material layer 212 away from the substrate 10. The first electrode 211 is electrically connected to the second electrode 614 through a through-hole penetrating the planarization layer 66. When the driving circuit layer 60 includes a transition structure and a planarization film layer, the first electrode 211 is electrically connected to the transition structure through a through-hole penetrating the planarization film layer, thereby the first electrode 211 is electrically connected to the second electrode 614 through the transition structure. One of the first electrode 211 and the second electrode 213 is an anode, and the other is a cathode. Figure 2 In the illustrated embodiment, the first electrode 211 is the anode, the second electrode 213 is the cathode, the cathode is a common electrode, and the cathodes of all sub-pixels 21 are connected to form a surface electrode. In some embodiments, the light-emitting material layer 212 is an organic light-emitting material layer, and the sub-pixels 21 are OLEDs. In one embodiment, the light-emitting structure layer 20 includes at least three sub-pixels 21 with different emission colors.

[0071] In one embodiment, such as Figure 2 As shown, the display substrate further includes a pixel defining layer 22 located on the side of the first electrode 211 away from the substrate 10. The pixel defining layer 22 is located on the side of the driving circuit layer 60 away from the substrate 10. The pixel defining layer 22 has a plurality of pixel openings 221, some of which are located in the first display area 101 and some in the second display area 102. Each pixel opening 221 corresponds to a sub-pixel 21, and each pixel opening 221 exposes at least a portion of the corresponding first electrode 211. At least a portion of the light-emitting material layer 212 of each sub-pixel is located within the pixel opening 221. At least a portion of the second electrode 213 is located on the side of the pixel defining layer 22 away from the substrate 10. Each pixel opening 221 defines the light-emitting area of ​​the corresponding sub-pixel 21. Specifically, the area defined by the pixel opening 221 facing the bottom surface of the substrate 10 is the light-emitting area of ​​the sub-pixel. In the direction from the substrate 10 to the pixel defining layer 22, the side of the pixel opening 221 extends obliquely outward. The pixel opening 221 of the pixel limiting layer 22 can be formed by an exposure and development process, resulting in the shape of the formed pixel opening 221.

[0072] In one embodiment, such as Figure 2 As shown, the display substrate further includes an encapsulation layer 30 located on the side of the light-emitting structure layer 20 away from the substrate 10. The encapsulation layer 30 may be a thin-film encapsulation layer, which includes alternating organic and inorganic layers, with the inorganic layer having the largest distance from the substrate 10. In some embodiments, the thin-film encapsulation layer may include two inorganic layers and an organic layer located between the two inorganic layers.

[0073] In one embodiment, such as Figure 2 As shown, the display substrate further includes a touch structure layer 80 located on the side of the encapsulation layer 30 away from the substrate 10. The touch structure layer 80 includes a first touch electrode layer 83, a second touch electrode layer 81 located on the side of the first touch electrode layer 83 away from the substrate 10, an insulating material layer 84 located between the first touch electrode layer 83 and the second touch electrode layer 81, and an insulating protective layer 86 located on the side of the second touch electrode layer 81 away from the substrate 10. The insulating protective layer 86 covers the second touch electrode layer 81. The second touch electrode layer 81 may include a plurality of first touch electrodes, a plurality of second touch electrodes, and a plurality of first connecting portions. The first touch electrode layer 83 includes a plurality of second connecting portions. Adjacent first touch electrodes can be connected through the first connecting portions, and adjacent second touch electrodes can be electrically connected through the second connecting portions. The materials of the insulating protective layer 86 and the insulating material layer 84 may be organic or inorganic materials, and the surface flatness of the insulating protective layer 86 and the insulating material layer 84 away from the substrate 10 is relatively good. In some embodiments, the materials of the insulating protective layer 86 and the insulating material layer 84 may be organic resin.

[0074] In one embodiment, such as Figure 2 As shown, the first insulating layer 70 is reused as an insulating protective layer 86. This helps to reduce the thickness of the display substrate. In other embodiments, the first insulating layer 70 and the insulating protective layer 86 are different film layers, and the first insulating layer 70 is located on the side of the insulating protective layer 86 away from the substrate 10.

[0075] In one embodiment, such as Figure 2 As shown, in the direction of the substrate 10 pointing towards the first insulating layer 70, the side of the opening 71 extends obliquely outward. The opening 71 of the first insulating layer 70 can be formed by an exposure and development process, resulting in the shape of the formed opening 71.

[0076] In one embodiment, such as Figure 2 As shown, the display substrate further includes a second insulating layer 82, and the refractive index of the first insulating layer 70 is less than that of the second insulating layer 82; each of the openings 71 is filled by the second insulating layer 82. With this configuration, when light emitted from the sub-pixel 21 is incident on the side of the opening 71 of the first insulating layer 70 via the second insulating layer 82, most of the light undergoes total internal reflection on the side of the opening 71 of the first insulating layer 70 and exits through the through-hole 51 of the light-shielding layer 50, thereby helping to reduce light loss and improve the light extraction efficiency of the display substrate.

[0077] In some embodiments, the refractive index of the first insulating layer 70 is in the range of 1.4 to 1.55, and the refractive index of the second insulating layer 82 is in the range of 1.6 to 1.7. This results in a large difference between the refractive indices of the second insulating layer 82 and the first insulating layer 70, which can effectively improve the total internal reflection efficiency of light incident on the side of the opening 71 of the first insulating layer 70.

[0078] In one embodiment, such as Figure 2 As shown, the display substrate further includes a color filter layer 40, which includes a plurality of color filter portions 41. Each color filter portion 41 partially fills a through-hole 51, and the orthographic projection of each color filter portion 41 on the substrate 10 overlaps the orthographic projection of the through-hole 51 on the substrate 10. Sub-pixels 21 correspond one-to-one with color filter portions 41, and the orthographic projection of each sub-pixel 21 on the substrate 10 falls within the orthographic projection of the corresponding color filter portion 41 on the substrate 10; the emission color of each sub-pixel 21 is the same as the color of the corresponding color filter portion 41. For example, the light-emitting structure layer 20 includes sub-pixels with a first emission color, sub-pixels with a second emission color, and sub-pixels with a third emission color; the color filter layer 40 includes a first color filter portion, a second color filter portion, and a third color filter portion. In some embodiments, the first color may be red, the second color may be blue, and the third color may be green. In some embodiments, the thickness of the color filter layer 40 ranges from 2.2 μm to 5 μm.

[0079] In one embodiment, such as Figure 2 As shown, the color filter layer 40 is reused as a second insulating layer 82, and each color filter portion 41 partially fills an opening 71. This configuration helps to reduce the thickness and structural complexity of the display substrate and simplifies the manufacturing process of the display substrate.

[0080] In one embodiment, the thickness of the light-shielding layer 50 ranges from 1 μm to 1.5 μm.

[0081] In one embodiment, such as Figure 2 As shown, the display substrate further includes a protective layer 85 located on the side of the color filter layer 40 and the light-shielding layer 50 away from the substrate 10; the protective layer 85 covers the surface of the light-shielding layer 50 away from the substrate 10 and the surface of the color filter layer 40 away from the substrate 10. The material of the protective layer 85 may be an organic resin. In some embodiments, the thickness of the protective layer 85 ranges from 2 μm to 4 μm.

[0082] In one embodiment, the difference between the depth h1 of the first opening 711 and the depth h2 of the second opening 712 ranges from 0.2 μm to 0.6 μm. Verification has shown that when the difference between h1 and h2 is within this range, it effectively improves the problem of bright and dark stripes appearing on the display substrate in a non-display state. In some embodiments, the difference between h1 and h2 can be 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, etc. In some embodiments, the value of h1 can be 2.1 μm, and the value of h2 can be 1.5 μm.

[0083] In one embodiment, such as Figures 4 to 7 As shown, the slope angle θ1 of the side of the first opening 711 is greater than the slope angle θ2 of the side of the second opening 712. Since the depth of the first opening 711 is greater than the depth of the second opening 712, if the slope angles of their sides are the same, the side area of ​​the first opening 711 corresponding to the same color sub-pixel is greater than the side area of ​​the second opening 712. The amount of total internal reflection of the light emitted by the sub-pixel 21 corresponding to the first opening 711 at the side of the first opening 711 is greater than the amount of total internal reflection of the light emitted by the sub-pixel 21 corresponding to the second opening 712 at the side of the second opening 712. This will result in the light emission efficiency of the first display area 101 at the front viewing angle being greater than that of the second display area 102 at the front viewing angle, causing a difference in display brightness between the first display area 101 and the second display area 102. By setting the slope angle θ1 of the side of the first opening 711 to be greater than the slope angle θ2 of the side of the second opening 712, the side area of ​​the second opening 712 can be increased, thereby increasing the amount of total internal reflection of the light emitted by the sub-pixel 21 corresponding to the second opening 712 on the side of the second opening 712. This reduces the difference between the light emission efficiency of the first display area 101 and the light emission efficiency of the second display area 102 at the front viewing angle, thus improving the display effect.

[0084] In one embodiment, when the difference between the depth h1 of the first opening 711 and the depth h2 of the second opening 712 is in the range of 0.2 μm to 0.6 μm, the difference between the slope angle θ1 of the side of the first opening 711 and the slope angle θ2 of the side of the second opening 712 is in the range of 15° to 35°. Verification has shown that the difference between θ1 and θ2 within this range can effectively improve the difference in light emission efficiency at the frontal viewing angle between the first display area 101 and the second display area 102. In some embodiments, the difference between θ1 and θ2 can be 15°, 25°, 25°, 30°, 35°, etc. In some embodiments, the value of h1 is 2.1 μm, the value of h2 is 1.5 μm, θ1 is 75°, and θ2 is 45°.

[0085] In one embodiment, such as Figures 8 to 11As shown, the distance between the edge of the first opening 711 facing the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 and the edge of the corresponding pixel opening 221 facing the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 is a first distance d1. The distance between the edge of the second opening 712 facing the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 and the edge of the corresponding pixel opening 221 facing the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 is a second distance d2. The second distance d2 corresponding to the pixel opening 221 where the sub-pixel 21 located in the first display area 101 is located is less than the first distance d1 corresponding to the pixel opening 221 where the sub-pixel 21 with the same emission color is located in the second display area 102. By setting the second distance d2 of the pixel opening 221 where the sub-pixel 21 with the same luminous color is located to be less than the corresponding first distance d1, the amount of light emitted by the sub-pixel 21 with the same luminous color that ultimately exits through the second opening 712 increases. This reduces the difference in light emission efficiency of the first display area 101 with the same luminous color from the first display area 101 compared to the second display area 102 due to the greater depth of the first opening 711 than the second opening 712, thus helping to improve the display effect.

[0086] In one embodiment, when the difference between the depth h1 of the first aperture 711 and the depth h2 of the second aperture 712 is in the range of 0.2μm to 0.6μm, the difference between the first distance d1 and the second distance d2 corresponding to the pixel opening 221 where the sub-pixel 21 with the same emitting color is located is in the range of 0.5μm to 2μm. Verification has shown that a difference between d1 and d2 within this range can effectively improve the difference in light emission efficiency of the same color of light from the positive viewing angle between the first display area 101 and the second display area 102. In some embodiments, the difference between the first distance d1 and the second distance d2 is in the range of 0.5μm, 1.0μm, 1.5μm, 2.0μm, etc. In some embodiments, the value of h1 is 2.1μm, the value of h2 is 1.5μm, the value of d1 is 2.0μm, and the value of d2 is 0.5μm.

[0087] In one embodiment, the first distance d1 corresponding to the pixel opening 221 of all the sub-pixels 21 of all the emitting colors in the first display area 101 can be the same, and the second distance d2 corresponding to the pixel opening 221 of all the sub-pixels 21 of all the emitting colors in the second display area 102 can be the same.

[0088] In one embodiment, such as Figures 2 to 11As shown, the first insulating layer 70 includes a first insulating portion 701 located in the first display area 101 and a second insulating portion 702 located in the second display area 102. The thickness of the first insulating portion 701 is greater than the thickness of the second insulating portion 702. The first opening 711 penetrates the first insulating portion 701, and the second opening 712 penetrates the second insulating portion 702.

[0089] In one embodiment, such as Figures 2 to 5 , Figure 8 and Figure 9 As shown, the surface of the first insulating portion 701 facing the substrate 10 and the surface of the second insulating portion 702 facing the substrate 10 are substantially on the same plane; the surface of the first insulating portion 701 away from the substrate 10 is higher than the surface of the second insulating portion 702 away from the substrate 10.

[0090] Furthermore, such as Figures 2 to 5 , Figure 8 and Figure 9 As shown, the insulating layer further includes a connecting portion 703 located between the first insulating portion 701 and the second insulating portion 702. The surface of the connecting portion 703 away from the substrate 10 is inclined 7031, and the inclined surface 7031 is connected to the surfaces of the first insulating portion 701 and the second insulating portion 702 away from the substrate 10, respectively. By providing the inclined surface 7031, the height of the surface of the first insulating portion 701 away from the substrate 10 to the surface of the second insulating portion 702 away from the substrate 10 can be gradually changed, preventing the light-shielding layer 50 from breaking at the junction of the first insulating portion 701 and the second insulating portion 702.

[0091] Furthermore, such as Figure 12 As shown, both edges of the orthographic projection of the inclined surface 7031 onto the substrate 10 are curved. This configuration can improve the diffraction phenomenon caused by ambient light incident on the connection portion 703 when the display substrate is not in a display state, thereby enhancing the display effect of the display substrate in a non-display state.

[0092] Furthermore, such as Figure 12 As shown, the two edges of the orthographic projection of the inclined surface 7031 onto the substrate 10 are both wavy. Experimental verification has shown that when the two edges of the orthographic projection of the inclined surface 7031 onto the substrate 10 are both wavy, it can effectively improve the diffraction phenomenon caused by ambient light incident on the connection portion 703 when the display substrate is not in a display state.

[0093] In one embodiment, such as Figure 6 and Figure 7 , Figure 10 and Figure 11As shown, the display substrate further includes a padding layer 90 located on the side of the second insulating portion 702 facing the substrate 10; the surface of the first insulating portion 701 away from the substrate 10 and the surface of the second insulating portion 702 away from the substrate 10 are on the same plane. By providing the padding layer 90, while ensuring that the depth of the first opening 711 is greater than the depth of the second opening 712, the surface of the first insulating portion 701 away from the substrate 10 and the surface of the second insulating portion 702 away from the substrate 10 are on the same plane, thereby effectively avoiding the risk of the light-shielding layer 50 breaking at the junction of the first insulating portion 701 and the second insulating portion 702.

[0094] In one embodiment, the refractive index of the padding layer 90 is less than that of the second insulating layer 82. This avoids the problem of reduced light extraction efficiency caused by reflection of light emitted from the sub-pixel 21 at the interface between the padding layer 90 and the second insulating layer 82.

[0095] Furthermore, the padding layer 90 and the first insulating layer 70 are an integral structure. This configuration allows the padding layer 90 and the first insulating layer 70 to be formed in the same process step using a halftone mask, which helps simplify the fabrication process of the display substrate.

[0096] This application also provides another display substrate. For example... Figure 13 and Figure 14 As shown, the display substrate includes a first display area 101 and a second display area 102; the display substrate includes a substrate 10, a light-emitting structure layer 20, a pixel defining layer 22, a first insulating layer 70, and a light-shielding layer 50 located on the substrate 10. The substrate 10, the light-emitting structure layer 20, the pixel defining layer 22, the first insulating layer 70, and the light-shielding layer 50 are all located in the first display area 101 and the second display area 102.

[0097] The light-emitting structure layer 20 and the pixel defining layer 22 are located on the same side of the substrate 10. The light-emitting structure layer 20 includes a plurality of spaced sub-pixels 21; the light-emitting structure layer 20 includes at least three sub-pixels 21 with different emission colors. The pixel defining layer 22 has a plurality of pixel openings 221, each sub-pixel 21 being at least partially located within one of the pixel openings 221, and the pixel opening 221 defining the light-emitting area of ​​the sub-pixel 21. The first insulating layer 70 is located on the side of the light-emitting structure layer 20 away from the substrate 10, and the first insulating layer 70 has a plurality of openings 71, the orthographic projection of each opening 71 on the substrate 10 covering the orthographic projection of the light-emitting area of ​​one sub-pixel 21 on the substrate 10; the plurality of openings 71 includes a plurality of first openings 711 located in the first display area 101 and a plurality of second openings 712 located in the second display area 102; the edge of the orthographic projection of the bottom surface of the first opening 711 toward the substrate 10 and the corresponding pixel opening 221 are oriented toward The distance between the edges of the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 is a third distance d3. The distance between the edge of the second opening 712 facing the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 and the edge of the corresponding pixel opening 221 facing the orthographic projection of the bottom surface of the substrate 10 onto the substrate 10 is a fourth distance d4. The fourth distance d4 corresponding to the pixel opening 221 where the sub-pixel 21 located in the second display area 102 is located is greater than the third distance d3 corresponding to the pixel opening 221 where the sub-pixel 21 with the same emission color is located in the first display area 101. The light-shielding layer 50 is located on the side of the first insulating layer 70 away from the substrate 10. The light-shielding layer 50 is provided with a plurality of through holes 51, and the orthographic projection of each through hole 51 onto the substrate 10 covers the orthographic projection of one opening 71 onto the substrate 10.

[0098] The display substrate provided in this application embodiment, by setting the fourth distance d4 corresponding to the pixel opening 221 where the sub-pixel 21 located in the second display area 102 is located to be greater than the third distance d3 corresponding to the pixel opening 221 where the sub-pixel 21 located in the first display area 101 is located with the same emitting color, then under the premise that the size of the pixel opening corresponding to the sub-pixel with the same emitting color is fixed, the bottom area of ​​the second opening 712 corresponding to the sub-pixel located in the second display area 102 is greater than the bottom area of ​​the first opening 711 corresponding to the sub-pixel with the same emitting color located in the first display area 101. As a result, the light-shielding material remaining in the second opening 712 of the second display area 102 is more easily flushed out, which can appropriately reduce the water pressure of the flushing equipment and avoid the light-shielding layer 50 located at the bottom of the side wall of the through hole 51 in the first display area 101 being flushed away, which would cause the display substrate to have alternating bright and dark stripes in the non-display state, thus improving the user experience.

[0099] It should be noted that when rinsing the light-shielding material remaining in the opening 71, the water pressure is generally set to be slightly higher to ensure that all the remaining light-shielding material is flushed out. Experiments have verified that by appropriately reducing the water pressure of the rinsing equipment, it is also possible to ensure that the light-shielding material remaining in the first opening 711 in the first display area 101 is flushed out.

[0100] Figures 13 to 18 The structure of the substrate 10, driving circuit layer 60, light-emitting structure layer 20, encapsulation layer 30, touch structure layer 80, color filter layer 40, second insulating layer 82, and organic layer 85 in the display substrate shown is similar to that of the substrate 10. Figure 2 and Figure 3 The structures shown are the same; for related descriptions, please refer to [link / reference]. Figure 2 and Figure 3 The description of the embodiments shown will not be repeated.

[0101] In one embodiment, the third distance d3 corresponding to the pixel opening 221 of all the sub-pixels 21 of the emitting colors located in the first display area 101 can be the same, and the fourth distance d4 corresponding to the pixel opening 221 of all the sub-pixels 21 of the emitting colors located in the second display area 102 can be the same.

[0102] In one embodiment, among sub-pixels with the same emitting color, the difference between the fourth distance d4 corresponding to the pixel opening 221 of the sub-pixel 21 located in the second display area 102 and the third distance d3 corresponding to the pixel opening 221 of the sub-pixel 21 located in the first display area 101 ranges from 1 μm to 3 μm. Verification has shown that this numerical range effectively improves the problem of bright and dark stripes appearing on the display substrate in a non-display state. In some embodiments, the difference between d4 and d3 can be 1 μm, 1.5 μm, 2.0 μm, 2.5 μm, 3 μm, etc. In some embodiments, the value of d4 can be 2.5 μm, and the value of d3 can be 0.5 μm.

[0103] In one embodiment, such as Figure 13 and Figure 14As shown, the slope angle θ1 of the side of the first opening 711 is greater than the slope angle θ2 of the side of the second opening 712. Since the fourth distance d4 corresponding to the pixel opening 221 where the sub-pixel 21 located in the first display area 101 is located is greater than the third distance d3 corresponding to the pixel opening 221 where the sub-pixel 21 located in the second display area 102 has the same emitting color, the amount of total internal reflection of the sub-pixel 21 located in the first display area 101 at the side of the corresponding first opening 711 is larger, while the amount of total internal reflection of the sub-pixel 21 located in the second display area 102 with the same emitting color at the side of the corresponding second opening 712 is smaller. This will result in the light extraction efficiency of the frontal view light of the first display area 101 being greater than that of the frontal view light of the second display area 102, causing a difference in display brightness between the first display area 101 and the second display area 102. By setting the slope angle θ1 of the side of the first opening 711 to be greater than the slope angle θ2 of the side of the second opening 712, the side area of ​​the second opening 712 can be increased, thereby increasing the amount of total internal reflection of the light emitted by the sub-pixel 21 on the side of the second opening 712, reducing the difference between the light emission efficiency of the first display area 101 and the light emission efficiency of the second display area 102 at the front viewing angle, and improving the display effect.

[0104] In one embodiment, when the difference between the fourth distance d4 corresponding to the pixel opening 221 of the sub-pixel 21 located in the second display area 102 and the third distance d3 corresponding to the pixel opening 221 of the sub-pixel 21 located in the first display area 101, which are sub-pixels with the same emitting color, is between 1 μm and 3 μm, the difference between the slope angle θ1 of the side of the first opening 711 and the slope angle θ2 of the side of the second opening 712 is between 15° and 35°. Verification has shown that the difference between θ1 and θ2 within this range can effectively improve the difference in light emission efficiency at the frontal viewing angle between the first display area 101 and the second display area 102. In some embodiments, the difference between θ1 and θ2 can be 15°, 25°, 25°, 30°, 35°, etc. In some embodiments, the value of d3 is 0.5 μm, the value of d4 is 2.5 μm, θ1 is 65°, and θ2 is 50°.

[0105] In one embodiment, such as Figure 13 and Figure 14 As shown, the depth of the first opening 711 is the same as the depth of the second opening 712.

[0106] In another embodiment, such as Figures 15 to 18As shown, the depth of the first opening 711 is greater than the depth of the second opening 712. By setting the depth of the first opening 711 to be greater than the depth of the second opening 712, the light-shielding material remaining in the second opening 712 is more easily flushed out of the second opening 712, which can further reduce the water pressure of the rinsing equipment and prevent the bottom of the side wall of the through hole 51 in the first display area 101 of the light-shielding layer 50 from being washed away.

[0107] In one embodiment, such as Figures 15 to 18 As shown, the first insulating layer 70 includes a first insulating portion 701 located in the first display area 101 and a second insulating portion 702 located in the second display area 102. The thickness of the first insulating portion 701 is greater than the thickness of the second insulating portion 702. The first opening 711 penetrates the first insulating portion 701, and the second opening 712 penetrates the second insulating portion 702.

[0108] In one embodiment, such as Figure 15 and Figure 16 As shown, the surface of the first insulating portion 701 facing the substrate 10 and the surface of the second insulating portion 702 facing the substrate 10 are substantially on the same plane; the surface of the first insulating portion 701 away from the substrate 10 is higher than the surface of the second insulating portion 702 away from the substrate 10.

[0109] Furthermore, such as Figure 15 and Figure 16 As shown, the insulating layer further includes a connecting portion 703 located between the first insulating portion 701 and the second insulating portion 702. The surface of the connecting portion 703 away from the substrate 10 is inclined 7031, and the inclined surface 7031 is connected to the surfaces of the first insulating portion 701 and the second insulating portion 702 away from the substrate 10, respectively. By providing the inclined surface 7031, the height of the surface of the first insulating portion 701 away from the substrate 10 to the surface of the second insulating portion 702 away from the substrate 10 can be gradually changed, preventing the light-shielding layer 50 from breaking at the junction of the first insulating portion 701 and the second insulating portion 702.

[0110] Furthermore, such as Figure 12 As shown, both edges of the orthographic projection of the inclined surface 7031 onto the substrate 10 are curved. This configuration can improve the diffraction phenomenon caused by ambient light incident on the connection portion 703 when the display substrate is not in a display state, thereby enhancing the display effect of the display substrate in a non-display state.

[0111] Furthermore, such as Figure 12As shown, the two edges of the orthographic projection of the inclined surface 7031 onto the substrate 10 are both wavy. Experimental verification has shown that when the two edges of the orthographic projection of the inclined surface 7031 onto the substrate 10 are both wavy, it can effectively improve the diffraction phenomenon caused by ambient light incident on the connection portion 703 when the display substrate is in a non-display state.

[0112] In one embodiment, such as Figure 17 and Figure 18 As shown, the display substrate further includes a padding layer 90 located on the side of the second insulating portion 702 facing the substrate 10; the second insulating portion 702 is located on the padding layer 90; the surface of the first insulating portion 701 away from the substrate 10 and the surface of the second insulating portion 702 away from the substrate 10 are on the same plane. The thickness of the padding layer 90 is the depth difference between the first opening 711 and the second opening 712. By setting the padding layer 90, while ensuring that the depth of the first opening 711 is greater than the depth of the second opening 712, the surface of the first insulating portion 701 away from the substrate 10 and the surface of the second insulating portion 702 away from the substrate 10 are on the same plane, thereby effectively avoiding the risk of the light-shielding layer 50 breaking at the junction of the first insulating portion 701 and the second insulating portion 702.

[0113] In one embodiment, the refractive index of the padding layer 90 is less than that of the second insulating layer 82. This avoids the problem of reduced light extraction efficiency caused by reflection of light emitted from the sub-pixel 21 at the interface between the padding layer 90 and the second insulating layer 82.

[0114] Furthermore, the padding layer 90 and the first insulating layer 70 are an integral structure. This configuration allows the padding layer 90 and the first insulating layer 70 to be formed in the same process step using a halftone mask, which helps simplify the fabrication process of the display substrate.

[0115] This application also provides a display device, which includes the display substrate described in any of the above embodiments.

[0116] In one embodiment, the display device further includes a driver and a power supply circuit, wherein the driver is used to provide a driving signal for driving the sub-pixels to emit light, and the power supply circuit is used to supply power to the display substrate.

[0117] In one embodiment, the display device further includes a housing, and the display substrate is disposed within the housing.

[0118] The display device provided in this application embodiment can be any device with display function, such as a mobile phone, tablet computer, television, laptop computer, or vehicle-mounted equipment.

[0119] It should be noted that the cross-sectional view in this application embodiment is a partial schematic diagram obtained by cutting the display substrate along a direction perpendicular to the stacking direction of the film layers.

[0120] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0121] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0122] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A display substrate, characterized in that, The display substrate includes a first display area and a second display area; the display substrate includes: Substrate; A light-emitting structure layer located on the substrate, the light-emitting structure layer comprising a plurality of spaced sub-pixels; A first insulating layer is located on the side of the light-emitting structure layer away from the substrate. The first insulating layer has a plurality of openings, and the orthographic projection of each opening on the substrate covers the orthographic projection of the light-emitting area of ​​a sub-pixel on the substrate. The plurality of openings includes a plurality of first openings located in the first display area and a plurality of second openings located in the second display area. The depth of the first openings is greater than the depth of the second openings. A light-shielding layer is located on the side of the first insulating layer away from the substrate. The light-shielding layer has a plurality of through holes, and the orthogonal projection of each of the through holes on the substrate covers the orthogonal projection of one of the openings on the substrate.

2. The display substrate according to claim 1, characterized in that, The display substrate further includes a pixel defining layer located between the substrate and the first insulating layer. The pixel defining layer has a plurality of pixel openings, and each sub-pixel is at least partially located within one of the pixel openings. The pixel opening defines the light-emitting area of ​​the sub-pixel. The orthographic projection of each of the openings on the substrate overlaps the orthographic projection of one of the pixel openings on the substrate; The distance between the edge of the first opening facing the orthographic projection of the bottom surface of the substrate onto the substrate and the edge of the corresponding pixel opening facing the orthographic projection of the bottom surface of the substrate onto the substrate is a first distance; the distance between the edge of the second opening facing the orthographic projection of the bottom surface of the substrate onto the substrate and the edge of the corresponding pixel opening facing the orthographic projection of the bottom surface of the substrate onto the substrate is a second distance; the light-emitting structure layer includes at least three sub-pixels with different light-emitting colors; the second distance corresponding to the pixel opening of the sub-pixel located in the second display area is less than the first distance corresponding to the pixel opening of the sub-pixel with the same light-emitting color located in the first display area.

3. The display substrate according to claim 1, characterized in that, The display substrate further includes a second insulating layer, wherein the refractive index of the first insulating layer is less than that of the second insulating layer; each of the openings is filled by the second insulating layer.

4. The display substrate according to claim 3, characterized in that, The slope angle of the side of the first opening is greater than the slope angle of the side of the second opening.

5. The display substrate according to claim 3, characterized in that, The display substrate further includes a color filter layer located on the side of the light-emitting structure layer away from the substrate. The color filter layer includes a plurality of color filter portions. The orthographic projection of each color filter portion on the substrate covers the orthographic projection of the light-emitting area of ​​one of the sub-pixels on the substrate. The color filter layer is reused as the second insulating layer.

6. The display substrate according to claim 3, characterized in that, The refractive index of the first insulating layer is in the range of 1.4 to 1.55, and the refractive index of the second insulating layer is in the range of 1.6 to 1.

7.

7. The display substrate according to claim 1, characterized in that, The first insulating layer includes a first insulating portion located in the first display area and a second insulating portion located in the second display area, wherein the thickness of the first insulating portion is greater than the thickness of the second insulating portion; the first opening penetrates the first insulating portion and the second opening penetrates the second insulating portion.

8. The display substrate according to claim 7, characterized in that, The surface of the first insulating portion facing the substrate and the surface of the second insulating portion facing the substrate are substantially on the same plane; the first insulating layer further includes a connecting portion located between the first insulating portion and the second insulating portion, the surface of the connecting portion away from the substrate is inclined, and the inclined surface is connected to the surface of the first insulating portion away from the substrate and the surface of the second insulating portion away from the substrate, respectively.

9. The display substrate according to claim 8, characterized in that, Both edges of the orthographic projection of the inclined plane onto the substrate are curved.

10. The display substrate according to claim 9, characterized in that, Both edges of the orthographic projection of the inclined plane onto the substrate are wavy.

11. The display substrate according to claim 7, characterized in that, The display substrate further includes a pad layer located on the side of the second insulating portion facing the substrate; the surface of the first insulating portion away from the substrate and the surface of the second insulating portion away from the substrate are on the same plane.

12. The display substrate according to claim 11, characterized in that, The padding layer and the first insulating layer are an integral structure.

13. The display substrate according to claim 1, characterized in that, The difference between the depth of the first opening and the depth of the second opening is in the range of 0.2μm to 0.6μm.

14. The display substrate according to claim 1, characterized in that, The display substrate further includes a touch structure layer located between the light-emitting structure layer and the light-shielding layer. The touch structure layer includes a first touch electrode layer, a second touch electrode layer located on the side of the first touch electrode layer away from the substrate, an insulating material layer located between the first touch electrode layer and the second touch electrode layer, and an insulating protective layer on the side of the second touch electrode layer away from the substrate. The first insulating layer is reused as the insulating protective layer.

15. A display substrate, characterized in that, The display substrate includes a first display area and a second display area; the display substrate includes: Substrate; A light-emitting structure layer is located on the substrate, the light-emitting structure layer comprising a plurality of spaced sub-pixels; the light-emitting structure layer comprises at least three sub-pixels with different emission colors; A pixel defining layer is located on the same side of the substrate as the light-emitting structure layer; the pixel defining layer has a plurality of pixel openings, and each sub-pixel is at least partially located within one of the pixel openings, the pixel opening defining the light-emitting area of ​​the sub-pixel; A first insulating layer is located on the side of the light-emitting structure layer away from the substrate. The first insulating layer has multiple openings. The multiple openings include multiple first openings located in the first display area and multiple second openings located in the second display area. The orthographic projection of each opening on the substrate covers the orthographic projection of a pixel opening on the substrate. The distance between the edge of the orthographic projection of the bottom surface of the first opening onto the substrate and the edge of the orthographic projection of the corresponding pixel opening onto the substrate is a third distance. The distance between the edge of the orthographic projection of the bottom surface of the second opening onto the substrate and the edge of the orthographic projection of the corresponding pixel opening onto the substrate is a fourth distance. The fourth distance corresponding to the pixel opening of the sub-pixel located in the second display area is greater than the third distance corresponding to the pixel opening of the sub-pixel with the same emitting color located in the first display area. A light-shielding layer is located on the side of the first insulating layer away from the substrate. The light-shielding layer has a plurality of through holes, and the orthogonal projection of each of the through holes on the substrate covers the orthogonal projection of one of the openings on the substrate.

16. The display substrate according to claim 15, characterized in that, The display substrate further includes a second insulating layer, wherein the refractive index of the first insulating layer is less than that of the second insulating layer; each of the openings is filled by the second insulating layer.

17. The display substrate according to claim 16, characterized in that, The slope angle of the side of the first opening is greater than the slope angle of the side of the second opening.

18. The display substrate according to claim 16, characterized in that, The display substrate further includes a color filter layer located on the side of the light-emitting structure layer away from the substrate. The color filter layer includes a plurality of color filter portions. The orthographic projection of each color filter portion on the substrate covers the orthographic projection of the light-emitting area of ​​one of the sub-pixels on the substrate. The color filter layer is reused as the second insulating layer.

19. The display substrate according to claim 16, characterized in that, The refractive index of the first insulating layer is in the range of 1.4 to 1.55, and the refractive index of the second insulating layer is in the range of 1.6 to 1.

7.

20. The display substrate according to claim 15, characterized in that, The depth of the first opening is greater than the depth of the second opening.

21. The display substrate according to claim 15, characterized in that, The depth of the first opening is the same as the depth of the second opening.

22. The display substrate according to claim 15, characterized in that, The display substrate further includes a touch structure layer located between the light-emitting structure layer and the light-shielding layer. The touch structure layer includes a first touch electrode layer, a second touch electrode layer located on the side of the first touch electrode layer away from the substrate, an insulating material layer located between the first touch electrode layer and the second touch electrode layer, and an insulating protective layer on the side of the second touch electrode layer away from the substrate. The first insulating layer is reused as the insulating protective layer.

23. A display device, characterized in that, The display device includes the display substrate according to any one of claims 1 to 22.

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