Display substrate and display device

Abstract

The utility model provides a display substrate and a display device. The display substrate comprises a substrate body, a light-emitting layer located on the substrate body, a light shielding layer located on the side, away from the substrate body, of the light-emitting layer, and a first insulating layer and a second insulating layer which are located on the side, away from the substrate body, of the light-emitting layer. The light-emitting layer comprises a plurality of sub-pixels which are arranged at intervals. The shading layer is provided with a plurality of holes, and the orthographic projection of one hole on the substrate covers the orthographic projection of the light-emitting area of one sub-pixel on the substrate. The first insulating layer comprises a plurality of first insulating parts, and the orthographic projection of one first insulating part on the substrate falls in the orthographic projection of one hole on the substrate; the distance from the surface, facing the substrate, of the first insulating part to the substrate is larger than the distance from the surface, facing the substrate, of the shading layer to the substrate, or the distance from the surface, away from the substrate, of the shading layer to the substrate is larger than the distance from the surface, away from the substrate, of the first insulating part to the substrate. The second insulating layer at least covers the side surface of the first insulating part; the refractive index of the second insulating layer is smaller than that of the first insulating part.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) has the advantages of self-luminescence, high efficiency, bright colors, light weight, power saving and wide operating temperature range. It has been gradually applied to large-area display, lighting and vehicle display. Utility Model Content

[0003] The present application provides a display substrate and a display device.

[0004] According to a first aspect of an embodiment of the present application, a display substrate is provided. The display substrate comprises:

[0005] substrate;

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

[0007] a light shielding layer, located on a side of the light emitting layer away from the substrate; the light shielding layer is provided with a plurality of openings, and an orthographic projection of one of the openings on the substrate covers an orthographic projection of a light emitting area of ​​one of the sub-pixels on the substrate;

[0008] A first insulating layer is located on a side of the light-emitting layer away from the substrate; the first insulating layer comprises a plurality of first insulating portions arranged at intervals, an orthographic projection of one of the first insulating portions on the substrate falling within an orthographic projection of one of the openings on the substrate; a distance from a surface of the first insulating portion facing the substrate to the substrate is greater than a distance from a surface of the light-shielding layer facing the substrate to the substrate, and a distance from a surface of the first insulating portion away from the substrate to the substrate is greater than a distance from a surface of the light-shielding layer away from the substrate to the substrate, or a distance from a surface of the light-shielding layer away from the substrate to the substrate is greater than a distance from a surface of the first insulating portion away from the substrate to the substrate, and a distance from a surface of the light-shielding layer facing the substrate to the substrate is greater than a distance from a surface of the first insulating portion facing the substrate to the substrate;

[0009] The second insulating layer at least covers the side surface of the first insulating portion; and the refractive index of the second insulating layer is smaller than the refractive index of the first insulating portion.

[0010] In one embodiment of the present application, a distance from a surface of the first insulating portion facing the substrate to the substrate is greater than or equal to a distance from a surface of the light shielding layer away from the substrate to the substrate.

[0011] In one embodiment of the present application, the display substrate further comprises a third insulating layer located on a side of the light emitting layer away from the substrate, the third insulating layer at least fills the opening, and the first insulating layer is located on a side of the third insulating layer away from the substrate.

[0012] In one embodiment of the present application, the refractive index of the third insulating layer is smaller than the refractive index of the first insulating portion.

[0013] In one embodiment of the present application, the display substrate also includes a fourth insulating layer located between the light-emitting layer and the first insulating layer, the fourth insulating layer includes an insulating material layer and a plurality of spaced-apart protrusion structures located on a side of the insulating material layer away from the substrate, the light-shielding layer is located on a surface of the insulating material layer away from the substrate, and one of the first insulating portions is located on a surface of one of the protrusion structures away from the substrate.

[0014] In one embodiment of the present application, the height of the protruding structure is greater than the thickness of the light shielding layer.

[0015] In one embodiment of the present application, the protruding structure and the insulating material layer are an integral structure; or the protruding structure and the insulating material layer are separate structures.

[0016] In one embodiment of the present application, an edge of an orthographic projection of a surface of the protruding structure facing the substrate on the substrate is located outside an edge of an orthographic projection of a corresponding surface of the first insulating portion facing the substrate on the substrate.

[0017] In one embodiment of the present application, a distance between an edge of an orthographic projection of a surface of the protruding structure facing the substrate and an edge of an orthographic projection of a surface of the corresponding first insulating portion facing the substrate on the substrate is in a range of 1 μm to 5 μm.

[0018] In one embodiment of the present application, the display substrate further includes a touch structure layer located between the light-emitting layer and the first insulating layer, the touch structure layer includes a touch electrode layer and an insulating protection layer covering the touch electrode layer, and the insulating material layer includes the insulating protection layer.

[0019] In one embodiment of the present application, the second insulating layer includes a plurality of color filter portions arranged at intervals; in at least some of the color filter portions, each of the color filter portions covers a side surface of the first insulating portion and a surface away from the substrate.

[0020] In one embodiment of the present application, the second insulating layer includes a red filter portion and a non-red filter portion, and one of the non-red filter portions covers a side surface of one of the first insulating portions and a surface away from the substrate; the first insulating layer also includes a plurality of second insulating portions, and the second insulating portions are provided with through holes, and one of the through holes is filled with a red filter portion, and the refractive index of the second insulating portion is smaller than the refractive index of the red filter portion, and the difference between the refractive index of the red filter portion and the refractive index of the second insulating portion is greater than the difference between the refractive index of the first insulating portion and the refractive index of the red filter portion.

[0021] In one embodiment of the present application, the display substrate also includes a pixel defining layer located between the substrate and the first insulating layer, the pixel defining layer is provided with a plurality of pixel openings, each of the sub-pixels is at least partially located within one of the pixel openings, and the pixel openings define the light-emitting area; the orthographic projection of each through hole toward the bottom surface of the substrate on the substrate covers the orthographic projection of one of the pixel openings toward the bottom surface of the substrate on the substrate.

[0022] In one embodiment of the present application, the edge of the through hole's orthographic projection on the bottom surface of the substrate is a first edge, the edge of the pixel opening's orthographic projection on the bottom surface of the substrate is a second edge, and the distance between the first edge of the through hole and the corresponding second edge of the pixel opening is less than or equal to 2 μm.

[0023] In one embodiment of the present application, the display substrate also includes a pixel defining layer located between the substrate and the first insulating layer, the pixel defining layer is provided with a plurality of pixel openings, the sub-pixel is at least partially located in one of the pixel openings, and the pixel opening defines the light-emitting area; the orthographic projection of each first insulating portion on the substrate toward the bottom surface of the substrate covers the orthographic projection of one pixel opening on the substrate toward the bottom surface of the substrate.

[0024] In one embodiment of the present application, the edge of the orthographic projection of the first insulating portion toward the bottom surface of the substrate on the substrate is the third edge, the edge of the orthographic projection of the pixel opening toward the bottom surface of the substrate on the substrate is the second edge, and the distance between the third edge of the first insulating portion and the corresponding second edge of the pixel opening is in the range of 0.5μm to 2μm.

[0025] In one embodiment of the present application, in a direction from the first insulating portion to the substrate, a side surface of the first insulating portion extends outwardly in an inclined manner; and an angle between the side surface of the first insulating portion and the surface of the substrate ranges from 55° to 85°.

[0026] In one embodiment of the present application, the shading layer is located on a side of the first insulating layer away from the substrate, and a distance from a surface of the shading layer facing the substrate to the substrate is greater than or equal to a distance from a surface of the first insulating layer away from the substrate to the substrate.

[0027] In one embodiment of the present application, the display substrate further includes an encapsulation layer located between the light-emitting layer and the light-shielding layer.

[0028] According to a second aspect of an embodiment of the present application, a display device is provided, comprising the above-mentioned display substrate.

[0029] The display substrate and display device provided by the embodiments of the present application, since the distance from the surface of the first insulating portion facing the substrate to the substrate is greater than the distance from the surface of the light-shielding layer facing the substrate to the substrate, and the distance from the surface of the first insulating portion away from the substrate to the substrate is greater than the distance from the surface of the light-shielding layer away from the substrate to the substrate, or the distance from the surface of the light-shielding layer away from the substrate to the substrate is greater than the distance from the surface of the first insulating portion away from the substrate to the substrate, and the distance from the surface of the light-shielding layer facing the substrate to the substrate is greater than the distance from the surface of the first insulating portion facing the substrate to the substrate, in the step of forming the first insulating portion, the influence of the light-shielding layer on the slope angle of the side of the first insulating portion can be improved, and the difference in slope angles of different areas of the side of the first insulating portion can be reduced, which helps to improve the symmetry of light brightness and light color on the two opposite sides of the display substrate with viewing angle changes, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a partial cross-sectional view of a display substrate provided by an exemplary embodiment of the present application;

[0031] Figure 2 is a partial cross-sectional view of a display substrate provided by an exemplary embodiment of the present application;

[0032] Figure 3 is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0033] Figure 4 is a partial cross-sectional view of a display substrate provided by yet another exemplary embodiment of the present application;

[0034] Figure 5 is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0035] Figure 6 is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0036] Figure 7is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0037] Figure 8 is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0038] Fig. 9 is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0039] Fig.10 is a partial cross-sectional view of a display substrate provided by another exemplary embodiment of the present application;

[0040] Fig.11 is a partial cross-sectional view of a display substrate provided by yet another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0041] The embodiments of the present application provide a display substrate and a display device. The display substrate and the display device in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features in the following embodiments can complement or combine with each other.

[0042] A display substrate such as Figure 1 As shown, the display substrate includes a substrate 10', a light emitting layer 20' located on the substrate 10', a light shielding layer 50' located on the side of the light emitting layer 20' away from the substrate 10', a first insulating layer 60' and a second insulating layer 70'; the light shielding layer 50' is provided with a plurality of openings 51' arranged at intervals; the light emitting layer 20' includes a plurality of sub-pixels 21'; the first insulating layer 60' includes a plurality of insulating portions 61', each insulating portion 61' is located in an opening 51'. The second insulating layer 70' covers the side surfaces of each insulating portion 61', and the refractive index of the insulating portion 61' is greater than the refractive index of the second insulating layer 70'.

[0043] Since the refractive index of the insulating portion 61' is greater than the refractive index of the second insulating layer 70', and the second insulating layer 70' covers the side of the insulating portion 61', the non-orthogonal viewing angle light emitted by the sub-pixel 21' can be refracted at the side of the first insulating portion 71' after being incident on the side of the first insulating portion 71', thereby changing the exit angle of this part of the light, which helps to improve the light output efficiency of the display substrate at the orthogonal viewing angle.

[0044] In the process of preparing the display substrate, the first insulating part is formed by an exposure and development process. The first insulating part is formed after the light shielding layer, and the first insulating part is formed in the opening of the first light shielding layer. When the distances from different areas of the side of the first insulating part to the side of the opening where it is located are different, the developer will have different flushing intensities on different areas of the side of the first insulating part, thereby making the slope angles of different areas of the side of the first insulating part different. Due to the alignment error in the exposure process, the distances between different areas of the first insulating part and the surface of the opening are not all the same, making the slope angles of different areas of the side of the first insulating part different. When the light emitted by the sub-pixel is incident on the side of the corresponding first insulating part, the degree of change in the exit angle of the light is different. If the slope angles of the relative areas in the side of the first insulating part are different, the brightness of the light on the two relative sides of the display substrate will be asymmetric with the change of the viewing angle, and the light color on the two relative sides will be asymmetric with the change of the viewing angle, affecting the user's experience.

[0045] The present application embodiment provides a display substrate. Figure 2 As shown, the display substrate includes a substrate 10 , a light emitting layer 20 , a light shielding layer 50 , a first insulating layer 70 and a second insulating layer 92 .

[0046] The light-emitting layer 20 is located on the substrate 10, and includes a plurality of sub-pixels 21 arranged at intervals. The light-shielding layer 50 is located on the side of the light-emitting layer 20 away from the substrate 10; the light-shielding layer 50 is provided with a plurality of openings 51, and the orthographic projection of one of the openings 51 on the substrate 10 covers the orthographic projection of the light-emitting area of ​​one of the sub-pixels 21 on the substrate 10. The first insulating layer 70 is located on the side of the light-emitting layer 20 away from the substrate 10; the first insulating layer 70 includes a plurality of first insulating portions 71 arranged at intervals, and the orthographic projection of one of the first insulating portions 71 on the substrate 10 falls within the orthographic projection of one of the openings 51 on the substrate 10. The distance between the surface of the first insulating portion 71 facing the substrate 10 and the substrate 10 is greater than the distance between the surface of the light shielding layer 50 facing the substrate 10 and the substrate 10, and the distance between the surface of the first insulating portion 71 away from the substrate 10 and the substrate 10 is greater than the distance between the surface of the light shielding layer 50 away from the substrate 10 and the substrate 10; or the distance between the surface of the light shielding layer 50 away from the substrate 10 and the substrate 10 is greater than the distance between the surface of the first insulating portion 71 away from the substrate 10 and the substrate 10, and the distance between the surface of the light shielding layer 50 facing the substrate 10 and the substrate 10 is greater than the distance between the surface of the first insulating portion 71 facing the substrate 10 and the substrate 10. The second insulating layer 92 at least covers the side surface of the first insulating portion 71; the refractive index of the second insulating layer 92 is less than the refractive index of the first insulating portion 71.

[0047] Since the refractive index of the first insulating part 71 is greater than the refractive index of the second insulating layer 92, and the second insulating layer 92 covers the side of the first insulating part 71, the non-orthogonal viewing angle light emitted by the sub-pixel 21 corresponding to the first insulating part 71 can be refracted on the side of the first insulating part 71 after being incident on the side of the first insulating part 71, thereby changing the exit angle of this part of the light, and improving the light output efficiency of the display substrate at the normal viewing angle.

[0048] In the display substrate provided by the embodiment of the present application, the distance from the surface of the first insulating part facing the substrate to the substrate is greater than the distance from the surface of the light-shielding layer facing the substrate to the substrate, and the distance from the surface of the first insulating part away from the substrate to the substrate is greater than the distance from the surface of the light-shielding layer away from the substrate to the substrate, or the distance from the surface of the light-shielding layer away from the substrate to the substrate is greater than the distance from the surface of the first insulating part away from the substrate to the substrate, and the distance from the surface of the light-shielding layer facing the substrate to the substrate is greater than the distance from the surface of the first insulating part facing the substrate to the substrate, that is, in the direction perpendicular to the stacking direction of the film layer, the first insulating part and the light-shielding layer are completely staggered, or only a partial thickness of the light-shielding layer is opposite to the first insulating part. In the step of forming the first insulating part, the influence of the light-shielding layer on the slope angle of the side of the first insulating part can be improved, and the difference in slope angles of different areas of the side of the first insulating part can be reduced, which helps to improve the symmetry of light brightness and light color on the two opposite sides of the display substrate with viewing angle changes, thereby improving the user experience.

[0049] In one embodiment, the substrate 10 may be a flexible substrate or a rigid substrate. The material of the flexible substrate may include one or more of polyimide, polyethylene terephthalate, polycarbonate, and organic resin materials, and the organic resin material may include epoxy resin, triazine, silicone resin, or polyimide. The rigid substrate includes any one of a glass substrate, a quartz substrate, a sapphire substrate, and the like.

[0050] In one embodiment, Figure 2 As shown, the display substrate further includes a driving circuit layer 60 located between the substrate 10 and the light emitting layer 20. The driving circuit layer 60 includes a plurality of pixel circuits, and the pixel circuits are used to drive the sub-pixels 21. The pixel circuits and the sub-pixels 21 may correspond one to one, and each pixel circuit is used to drive the corresponding sub-pixel 21.

[0051] In one embodiment, Figure 2As 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 a source electrode, and the other is a drain electrode. The capacitor 62 includes a first electrode plate 621 and a second electrode plate 622 opposite to each other. The pixel circuit layer may also include a plurality of signal lines, such as a scanning signal line, a data signal line, a power signal line, etc.

[0052] In one embodiment, Figure 2 As shown, the gate 612 and the first plate 621 of the capacitor 62 are located in the same layer, the second plate 622 of the capacitor 62 is located on the side of the first plate 621 away from the substrate 10, and the first electrode 613 and the second electrode 614 are located in the same layer and are located on the side of the second plate 622 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 plate 622, an interlayer dielectric layer 65 located between the second plate 622 and the first electrode 613, and a planarization layer 66 located between the first electrode 613 and the first electrode 211. The first electrode 211 is electrically connected to the second electrode 614 through a through hole penetrating the planarization layer 66, and the first electrode 613 and the second electrode 614 are in contact with the active layer 611 through through holes penetrating the interlayer dielectric layer 65, the capacitor insulating layer 64 and the gate insulating layer 63, respectively.

[0053] In one embodiment, the light emitting layer 20 includes at least three sub-pixels 21 with different light emitting colors. For example, the light emitting layer 20 may include a sub-pixel with a red light emitting color, a sub-pixel with a green light emitting color, and a sub-pixel with a blue light emitting color.

[0054] In one embodiment, Figure 2 As shown, the sub-pixel 21 includes a first electrode 211, a light-emitting material layer 212 located on a side of the first electrode 211 away from the substrate 10, and a second electrode 213 located on a side of the light-emitting material layer 212 away from the substrate 10. One of the first electrode 211 and the second electrode 213 is an anode, and the other is a cathode. The cathode can be a common electrode, and the cathodes of all sub-pixels 21 can be connected to form a surface electrode. In some embodiments, the light-emitting material layer 212 is an organic light-emitting material layer.

[0055] In one embodiment, Figure 2As shown, the light-emitting layer 20 further includes a pixel defining layer 22, and the pixel defining layer is provided with a plurality of pixel openings 221. The pixel defining layer 22 is located on the side of the first electrode 211 away from the substrate 10. The pixel openings 221 may correspond to the sub-pixels 21 one by one, and each pixel opening 221 exposes at least a portion of the corresponding first electrode 211. The light-emitting material layer 212 of each sub-pixel 21 is at least partially located in the pixel opening 221. The second electrode 213 is at least partially located on the side of the pixel defining layer 22 away from the substrate 10. Each of the pixel openings 221 defines a light-emitting area of ​​the corresponding sub-pixel 21, and specifically, the area defined by the bottom surface of the pixel opening 221 facing the substrate 10 is the light-emitting area of ​​the sub-pixel 21.

[0056] In one embodiment, Figure 2 As shown, in the direction from the substrate 10 to the second electrode 213, the side of the pixel opening 221 extends outwardly at an angle. The pixel defining layer 22 can be formed by an exposure and development process, so that the shape of the formed pixel opening 221 is as follows.

[0057] In one embodiment, Figure 2 As shown, the display substrate further includes an encapsulation layer 30 located between the light emitting layer 20 and the light shielding layer 50, and the light shielding layer 50, the first insulating layer 70 and the second insulating layer 92 are all located on the side of the encapsulation layer 30 away from the substrate 10. The encapsulation layer 30 may be a thin film encapsulation layer, which includes an organic layer and an inorganic layer arranged alternately, and the film layer with the largest distance from the substrate 10 is the inorganic layer. For example, the thin film encapsulation layer may include two inorganic layers and an organic layer located between the two inorganic layers.

[0058] In one embodiment, the display substrate further includes a touch structure layer 80 located between the encapsulation layer 30 and the light shielding layer 50. Figure 2 As shown, the touch structure layer 80 includes a touch electrode layer 83, a touch electrode layer 81 located on the side of the touch electrode layer 83 away from the substrate 10, an insulating layer 84 located between the touch electrode layer 83 and the touch electrode layer 81, and an insulating protective layer 82 located on the side of the touch electrode layer 81 away from the substrate 10, and the insulating protective layer 82 covers the touch electrode layer 81. The 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, and the touch electrode layer 83 includes a plurality of second connecting portions, and adjacent first touch electrodes may be connected through the first connecting portions, and adjacent second touch electrodes may be electrically connected through the second connecting portions. The material of the insulating protective layer 82 and the insulating layer 84 may be an organic material, and the surface of the insulating protective layer 82 and the insulating layer 84 away from the substrate 10 has a good flatness. In some embodiments, the material of the insulating protective layer 82 and the insulating layer 84 may be an organic resin.

[0059] In one embodiment, Figure 2As shown, the display substrate further includes a color filter layer 40 located on the side of the second insulating layer 92 away from the substrate 10, and the color filter layer 40 includes a plurality of color filter portions 41 arranged at intervals. The color filter layer 40 includes color filter portions 41 of at least three colors, and the color filter portions 41 may correspond to the sub-pixels 21 one by one. The orthographic projection of each color filter portion 41 on the substrate 10 covers the orthographic projection of the pixel opening 221 corresponding to the corresponding sub-pixel 21 on the substrate 10, and the color of the color filter portion 41 is the same as the luminous color of the corresponding sub-pixel 21. The color filter layer 40 can filter the incident external ambient light, reduce the amount of reflection of the incident ambient light, and compared with the solution of setting a polarizer, it can reduce the loss of the outgoing light and improve the light output efficiency; by setting the orthographic projection of each color filter part 41 on the substrate 10 to cover the orthographic projection of the pixel opening 221 corresponding to the corresponding sub-pixel 21 on the substrate 10, a larger amount of light emitted by the sub-pixel 21 can be incident on the corresponding color filter part 41, which helps to improve the utilization rate of light.

[0060] The orthographic projection of the color filter portion 41 on the substrate 10 covers the orthographic projection of the pixel opening 221 corresponding to the sub-pixel 21 on the substrate 10, which means that the area of ​​the orthographic projection of the color filter portion 41 on the substrate 10 is larger than the area of ​​the orthographic projection of the corresponding pixel opening 221 on the substrate 10, or the orthographic projection of the color filter portion 41 on the substrate 10 is substantially overlapped with the orthographic projection of the corresponding pixel opening 221 on the substrate 10. Preferably, the area of ​​the orthographic projection of the color filter portion 41 on the substrate 10 is larger than the area of ​​the orthographic projection of the corresponding pixel opening 221 on the substrate 10, so that more light rays emitted by the sub-pixel 21 can be incident on the corresponding color filter portion 41.

[0061] In one embodiment, Figure 2 As shown, the display substrate further includes a protective layer 93 located on the side of the color filter layer 40 away from the substrate 10, and the protective layer 93 covers the side surfaces of each color filter portion 41 and the surface away from the substrate 10. The material of the protective layer 93 can be organic resin.

[0062] In one embodiment, Figures 2 to 10 As shown, the distance between the surface of the first insulating portion 71 facing the substrate 10 and the substrate 10 is greater than or equal to the distance between the surface of the light shielding layer 50 away from the substrate 10 and the substrate 10. In this way, the slope angle of the side surface of the first insulating portion 71 is basically not affected by the light shielding layer 50, which can effectively reduce the difference in slope angles of different areas of the side surface of the first insulating portion 71.

[0063] In one embodiment, Figure 2As shown, the display substrate further includes a third insulating layer 91 located on the side of the light emitting layer 20 away from the substrate 10, the third insulating layer 91 at least fills the opening 51 of the light shielding layer 50, and the first insulating layer 70 is located on the side of the third insulating layer 91 away from the substrate 10. By providing the third insulating layer 91 that at least fills the opening of the light shielding layer 50, the step difference between the surface of the first insulating portion 71 facing the substrate 10 and the surface of the light shielding layer 50 facing the substrate 10 can be increased, thereby reducing the influence of the light shielding layer 50 on the slope angle of the side surface of the first insulating portion 71; at the same time, a flat surface is provided for the formation of the first insulating portion 71, which helps to improve the consistency of the slope angle of the side surface of the first insulating portion 71.

[0064] Furthermore, if Figure 2 As shown, the third insulating layer 91 fills the opening 51 of the light shielding layer 50 and covers the surface of the light shielding layer 50 away from the substrate 10, and the surface of the third insulating layer 91 away from the substrate 10 is substantially flush. That is, the distance from the surface of the first insulating portion 71 facing the substrate 10 to the substrate 10 is greater than the distance from the surface of the light shielding layer 50 away from the substrate 10 to the substrate 10.

[0065] In one embodiment, the thickness of the light shielding layer 50 is about 1 μm, and the thickness of the third insulating layer 91 is in the range of 1.5 μm to 3 μm. Thus, the third insulating layer 91 fills the opening 51 of the light shielding layer 50 and covers the surface of the light shielding layer 50 away from the substrate, ensuring that the light shielding layer 50 does not affect the slope angle of the side surface of the first insulating portion.

[0066] In one embodiment, the material of the third insulating layer 91 is an organic material. This can make the surface of the third insulating layer 91 away from the substrate 10 substantially flush, and when the first insulating portion 71 is formed on the surface of the third insulating layer 91 away from the substrate 10, the uniformity of the slope angles of different areas of the side of the first insulating portion 71 can be improved. In some embodiments, the material of the third insulating layer 91 is an organic resin.

[0067] In one embodiment, the refractive index of the third insulating layer 91 is smaller than the refractive index of the first insulating portion 71. This configuration can prevent the light emitted by the sub-pixel 21 from being reflected or refracted when passing through the interface between the third insulating layer 91 and the first insulating portion 71, thereby affecting the light output of the display substrate.

[0068] In one embodiment, Figure 2As shown, the third insulating layer 91 is in direct contact with the insulating protective layer 82, and the refractive index of the third insulating layer 91 and the insulating protective layer 82 may be the same, or the difference is very small, for example, less than 0.1. This can reduce the loss of light emitted by the sub-pixel at the interface between the third insulating layer 91 and the insulating protective layer 82. In some embodiments, the refractive index of the third insulating layer 91 and the refractive index of the insulating protective layer 82 may both be in the range of 1.45 to 1.5. In this way, the materials of the third insulating layer 91 and the insulating protective layer 82 are easy to obtain.

[0069] In one embodiment, Figure 3 and Figure 4 As shown, the display substrate further includes a fourth insulating layer 95 located between the light emitting layer 20 and the first insulating layer 70, the fourth insulating layer 95 includes an insulating material layer 821 and a plurality of spaced protrusion structures 822 located on a side of the insulating material layer 821 away from the substrate 10, the light shielding layer 50 is located on a surface of the insulating material layer 821 away from the substrate 10, and one of the first insulating portions 71 is located on a surface of one of the protrusion structures 822 away from the substrate 10. The first insulating portions 71 and the protrusion structures 822 may correspond one to one, and each first insulating portion 71 is located on a surface of the corresponding protrusion structure 822 away from the substrate 10. In this way, the step difference between the surface of the first insulating portion 71 facing the substrate 10 and the surface of the light shielding layer 50 facing the substrate 10 can be increased, thereby reducing the influence of the light shielding layer 50 on the slope angle of the side of the first insulating portion 71.

[0070] Furthermore, if Figure 3 and Figure 4 As shown, the height of the protruding structure 822 is greater than the thickness of the light shielding layer 50. The height of the protruding structure 822 and the thickness of the light shielding layer 50 both refer to the dimensions in the stacking direction of the film layers. With such an arrangement, the distance from the surface of the first insulating portion 71 facing the substrate 10 to the substrate 10 can be greater than the distance from the surface of the light shielding layer 50 away from the substrate 10 to the substrate 10, effectively improving the influence of the light shielding layer 50 on the slope angle of the side of the first insulating portion 71. In some embodiments, the thickness of the light shielding layer 50 is about 1 μm, and the height of the protruding structure 822 is greater than or equal to 1.5 μm, for example, the height of the protruding structure 822 ranges from 1.5 μm to 2 μm.

[0071] In one embodiment, the insulating material layer 821 includes the insulating protection layer 82. In this configuration, the insulating protection layer 82 is used as the insulating material layer 821 of the fourth insulating layer 95, which can simplify the manufacturing process of the display substrate and reduce the thickness of the display substrate. Figure 3 In the illustrated embodiment, the insulating material layer 821 is an insulating protection layer 82 .

[0072] In one embodiment, Figure 3 As shown, the protruding structure 822 and the insulating material layer 821 are an integral structure. In this way, the protruding structure 822 and the insulating material layer 821 can be formed simultaneously in the same process step, which helps to simplify the preparation process. For example, a half-tone mask can be used to control the exposure degree of different areas, and the protruding structure 822 and the insulating material layer 821 can be formed simultaneously. In another embodiment, Figure 4 As shown, the protruding structure 822 and the insulating material layer 821 are separate structures.

[0073] In one embodiment, Figure 3 and Figure 4 As shown, the edge of the orthographic projection of the surface of the protruding structure 822 facing the substrate 10 on the substrate 10 is located outside the edge of the orthographic projection of the surface of the corresponding first insulating portion 71 facing the substrate 10 on the substrate 10. This arrangement can prevent some non-orthographic viewing angle light rays emitted by the sub-pixel 21 from being deflected at the side of the protruding structure 822. However, due to the small difference in refractive index between the protruding structure 822 and the second insulating layer 92, the angle at which the non-orthographic viewing angle light rays are deflected at the side of the protruding structure 822 is too small and cannot be converted into orthographic viewing angle light rays, which is not conducive to improving the orthographic viewing angle light output of the display substrate.

[0074] Furthermore, if Figure 3 As shown, the distance between the edge of the orthographic projection of the surface of the protruding structure 822 facing the substrate 10 on the substrate 10 and the edge of the orthographic projection of the surface of the corresponding first insulating portion 71 facing the substrate 10 on the substrate 10 is d1, and the range of d1 is 1μm to 5μm. This arrangement can avoid d1 being too small, that is, the width of the protruding structure 822 exceeding the corresponding first insulating portion 71 is too small, resulting in a part of the non-normal viewing angle light emitted by the sub-pixel 21 being incident on the side of the protruding structure 822, which is not conducive to improving the normal viewing angle light output of the display substrate; it can also avoid d1 being too large, resulting in a small number of protruding structures 822 under the premise of a certain size of the display substrate, thereby reducing the density of the sub-pixels of the display substrate. In some embodiments, d1 can be 1μm, 2μm, 3μm, 4μm, 5μm, etc.

[0075] In one embodiment, Figures 5 to 7 As shown, the second insulating layer 92 includes a plurality of color filter portions 41 arranged at intervals; in at least some of the color filter portions 41, each of the color filter portions 41 covers a side surface of the first insulating portion 71 and a surface away from the substrate 10. That is, the color filter portion 41 is reused as the second insulating layer 92, which can reduce the complexity of the film structure of the display substrate and simplify the manufacturing process of the display substrate.

[0076] in, Figure 5 In the illustrated embodiment, the display substrate further includes a third insulating layer 91 located on the side of the light-emitting layer 20 away from the substrate 10 , the third insulating layer 91 at least fills the opening 51 of the light-shielding layer 50 , and the first insulating layer 70 is located on the side of the third insulating layer 91 away from the substrate 10 . Figure 6 and Figure 7 In the illustrated embodiment, the display substrate further includes a fourth insulating layer 95 located between the light emitting layer 20 and the first insulating layer 70, the fourth insulating layer 95 includes an insulating material layer and a plurality of spaced protrusion structures 822 located on a side of the insulating material layer 821 away from the substrate 10, the light shielding layer 50 is located on a surface of the insulating material layer 821 away from the substrate 10, and each of the first insulating portions 71 is located on a surface of one of the protrusion structures 822 away from the substrate 10. For the introduction of the third insulating layer and the fourth insulating layer, please refer to the above-mentioned related embodiments, and no further description will be given.

[0077] Furthermore, the refractive index of the first insulating portion is greater than or equal to 1.8. Since the refractive index of the color filter portion 41 is generally large, the refractive index of the first insulating portion is set to be greater than or equal to 1.8, so that the refractive index difference between the first insulating portion and the color filter portion can improve the light extraction efficiency of the normal viewing angle light in the display substrate.

[0078] In one embodiment, Figures 8 to 10As shown, the second insulating layer 92 includes a red filter portion 411 and a non-red filter portion 412, and one of the non-red filter portions 412 covers a side surface of one of the first insulating portions 71 and a surface away from the substrate 10; the first insulating layer also includes a plurality of second insulating portions 72, and the second insulating portions 72 are provided with through holes 721, and one of the through holes 721 is filled with one of the red filter portions 411, that is, the red filter portion 411 is in direct contact with the side surface of the through hole 721; the refractive index of the second insulating portion 72 is smaller than the refractive index of the red filter portion 411, and the difference between the refractive index of the red filter portion 411 and the refractive index of the second insulating portion 72 is greater than the difference between the refractive index of the first insulating portion 71 and the refractive index of the red filter portion 411. In the color filter layer 40, the refractive index of the red filter portion 411 is approximately 1.7, and the refractive index range of the non-red filter portion 412 (blue filter portion and green filter portion) is 1.58 to 1.6. The refractive index difference between the first insulating portion 71 and the red filter portion 411 is smaller than the refractive index difference between the first insulating portion 71 and the non-red filter portion 412. The light emitted by the red sub-pixel has a smaller deflection angle when passing through the interface between the first insulating portion and the red filter portion 411, resulting in a smaller amount of red light in the normal viewing angle light in the display substrate, affecting the display effect of the display substrate. In this embodiment, a red filter portion 411 is arranged to fill the through hole 721 of the second insulating portion 72. The difference between the refractive index of the red filter portion 411 and the refractive index of the second insulating portion 72 is greater than the difference between the refractive index of the first insulating portion 71 and the refractive index of the red filter portion 411. When the light emitted by the sub-pixel 21 corresponding to the red filter portion 411 is incident on the side of the through hole 721 of the second insulating portion 72, the refraction of the light by the side of the through hole 721 of the second insulating portion 72 is more conducive to converting the light into normal viewing angle light, thereby increasing the amount of red light in the normal viewing angle light in the display substrate.

[0079] Furthermore, the refractive index of the second insulating portion 72 is in the range of 1.45 to 1.5. This can make the difference between the refractive index of the second insulating portion 72 and the red filter portion 411 larger, which is more conducive to converting the light incident on the side of the through hole 721 of the second insulating portion 72 into the normal viewing angle light, and the material of the second insulating portion 72 is easy to obtain.

[0080] In one embodiment, Figures 8 to 10 As shown, in the direction from the substrate 10 to the protection layer 93, the side surface of the through hole 721 extends outwardly at an angle. The second insulating portion 72 can be formed by an exposure and development process, so that the shape of the formed through hole 721 is as follows.

[0081] Further, the orthographic projection of each through hole 721 toward the bottom surface of the substrate 10 on the substrate 10 covers the orthographic projection of one pixel opening 221 toward the bottom surface of the substrate 10 on the substrate 10. Specifically, each through hole 721 corresponds to one pixel opening 221, and the orthographic projection of the through hole 721 toward the bottom surface of the substrate 10 on the substrate 10 covers the orthographic projection of the corresponding pixel opening 221 toward the bottom surface of the substrate 10 on the substrate 10. In this way, more non-orthographic viewing angle light rays can be converted into orthographic viewing angle light rays at the side of the through hole 721.

[0082] Furthermore, the edge of the orthographic projection of the through hole 721 toward the bottom surface of the substrate 10 on the substrate 10 is the first edge, and the edge of the orthographic projection of the pixel opening 221 toward the bottom surface of the substrate 10 on the substrate 10 is the second edge. Fig. 9 As shown, the distance between the first edge of the through hole 721 and the second edge of the corresponding pixel opening 221 is d2, and d2 is less than or equal to 2μm. This arrangement can ensure that more non-normal viewing angle light is converted into normal viewing angle light at the side of the through hole 721, and at the same time avoid d2 being too large to affect the pixel density of the display substrate. In some embodiments, d2 can be 0, 0.5μm, 1μm, 1.5μm, 2μm, etc.

[0083] In one embodiment, Fig.11 As shown, the light shielding layer 50 is located on the side of the first insulating layer 70 away from the substrate 10, and the distance between the surface of the light shielding layer 50 facing the substrate 10 and the substrate 10 is greater than or equal to the distance between the surface of the first insulating portion 71 away from the substrate 10 and the substrate 10. In this way, the light shielding layer 50 is formed after the first insulating portion 71, and the light shielding layer 50 does not affect the slope angle of the side surface of the first insulating portion.

[0084] Furthermore, if Fig.11 As shown, the light shielding layer 50 is located on the side of the color filter layer 40 away from the substrate 10, and is in direct contact with the color filter layer 40. In this way, the distance between the light shielding layer 50 and the surface of the display substrate away from the substrate is small, and the external ambient light passes through fewer film layers before entering the light shielding layer 50, and the amount of reflection is small, which helps to improve the dark state effect of the display substrate in the non-display state.

[0085] In one embodiment, Figures 2 to 11 As shown, in the direction in which the protection layer 93 points to the substrate 10, the side surface of the first insulating portion 71 extends outwardly at an angle. The first insulating portion 71 can be formed by an exposure and development process, so that the shape of the formed first insulating portion 71 is as follows.

[0086] In one embodiment, Figures 2 to 11 As shown, the orthographic projection of each first insulating portion 71 on the substrate 10 toward the bottom surface of the substrate 10 covers the orthographic projection of one pixel opening 221 on the substrate 10 toward the bottom surface of the substrate 10. In this way, when the light emitted by the sub-pixel 21 passes through the corresponding first insulating portion 71, more non-orthographic viewing angle light can be converted into orthographic viewing angle light at the side of the first insulating portion 71.

[0087] Furthermore, the edge of the orthographic projection of the first insulating portion 71 on the substrate 10 is the third edge, and the edge of the orthographic projection of the pixel opening 221 on the bottom surface of the substrate 10 is the second edge. Figure 2 As shown, the distance between the third edge of the first insulating portion 71 and the corresponding second edge of the pixel opening 221 is d3, and the range of d3 is 0.5μm to 2μm. This arrangement can ensure that more non-normal viewing angle light is converted into normal viewing angle light at the side of the first insulating portion 71, and can also avoid d3 being set too large, which leads to a decrease in the pixel density of the display substrate. In some embodiments, d3 can be 0.5μm, 1μm, 1.5μm, 2μm, etc.

[0088] In one embodiment, in the direction from the first insulating portion 71 to the substrate 10, the side of the first insulating portion 71 extends outwardly at an angle; the angle between the side of the first insulating portion 71 and the surface of the substrate 10 (that is, the slope angle) ranges from 55° to 85°. In this way, more of the non-normal viewing angle light incident on the side of the first insulating portion 71 can be converted into normal viewing angle light, effectively increasing the amount of normal viewing angle light of the display substrate. In some embodiments, the angle between the side of the first insulating portion 71 and the surface of the substrate 10 can be 55°, 60°, 65°, 70°, 75°, 80°, 85°, etc.

[0089] In one embodiment, the refractive index of the first insulating portion 71 is in the range of 1.7 to 1.8, and the refractive index of the second insulating layer 92 is in the range of 1.45 to 1.5. In this way, the difference in refractive index between the first insulating portion 71 and the second insulating layer 92 is large, which is more conducive to converting the light incident on the side of the first insulating portion 71 into the front view light, and the materials of the first insulating portion 71 and the second insulating layer 92 are easy to obtain.

[0090] In one embodiment, the thickness of the first insulating portion 71 ranges from 1.5 μm to 3 μm. This arrangement can avoid the first insulating portion 71 being too thin, resulting in a small amount of non-normal viewing angle light deflected on the side of the first insulating portion 71, which is not conducive to improving the light output efficiency of the display substrate at the normal viewing angle. It can also avoid the first insulating portion 71 being too thick, resulting in poor flatness of the surface of the second insulating layer 92, resulting in the flatness of the color filter portion located on the second insulating layer 92, and affecting the uniformity of the emitted light. In some embodiments, the thickness of the first insulating portion 71 can be 1.5 μm, 2 μm, 2.5 μm, 3 μm, etc.

[0091] It should be noted that Figures 3 to 11 The film structures of the driving circuit layer 60 and the touch structure layer 80 are simplified, and only part of the film layers are illustrated. For example, the driving circuit layer 60 does not illustrate the specific film structure, and the touch structure layer 80 only illustrates the touch electrode layer 81 and the insulating protection layer 82. Figures 3 to 11 In the embodiment shown, the structure of the driving circuit layer 60 and the structure of the touch structure layer 80 are similar to Figure 2 The embodiments shown may be identical.

[0092] The embodiment of the present application further provides a display device, wherein the display device comprises the display substrate described in any of the above embodiments.

[0093] 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-pixel to emit light, and the power supply circuit is used to supply power to the display substrate.

[0094] In one embodiment, the display device further includes a housing, and the display substrate is disposed in the housing.

[0095] The display device provided in the embodiment of the present application may be, for example, a mobile phone, a tablet computer, a television, a laptop computer, a vehicle-mounted device, or any other device with a display function.

[0096] It should be noted that in the drawings of the present application, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element.

Claims

1. A display substrate, characterized in that: The display substrate comprises: substrate; A light-emitting layer, located on the substrate, comprising a plurality of sub-pixels arranged at intervals; a light shielding layer, located on a side of the light emitting layer away from the substrate; the light shielding layer is provided with a plurality of openings, and an orthographic projection of one of the openings on the substrate covers an orthographic projection of a light emitting area of ​​one of the sub-pixels on the substrate; A first insulating layer is located on a side of the light-emitting layer away from the substrate; the first insulating layer comprises a plurality of first insulating portions arranged at intervals, an orthographic projection of one of the first insulating portions on the substrate falling within an orthographic projection of one of the openings on the substrate; a distance from a surface of the first insulating portion facing the substrate to the substrate is greater than a distance from a surface of the light-shielding layer facing the substrate to the substrate, and a distance from a surface of the first insulating portion away from the substrate to the substrate is greater than a distance from a surface of the light-shielding layer away from the substrate to the substrate, or a distance from a surface of the light-shielding layer away from the substrate to the substrate is greater than a distance from a surface of the first insulating portion away from the substrate to the substrate, and a distance from a surface of the light-shielding layer facing the substrate to the substrate is greater than a distance from a surface of the first insulating portion facing the substrate to the substrate; The second insulating layer at least covers the side surface of the first insulating portion; and the refractive index of the second insulating layer is smaller than the refractive index of the first insulating portion.

2. The display substrate according to claim 1, characterized in that: A distance from a surface of the first insulating portion facing the substrate to the substrate is greater than or equal to a distance from a surface of the light shielding layer away from the substrate to the substrate.

3. The display substrate according to claim 1, characterized in that: The display substrate further includes a third insulating layer located on a side of the light emitting layer away from the substrate, the third insulating layer at least fills the opening, and the first insulating layer is located on a side of the third insulating layer away from the substrate.

4. The display substrate according to claim 3, characterized in that: The refractive index of the third insulating layer is smaller than the refractive index of the first insulating portion.

5. The display substrate according to claim 1, characterized in that: The display substrate also includes a fourth insulating layer located between the light-emitting layer and the first insulating layer, the fourth insulating layer includes an insulating material layer and a plurality of spaced-apart protrusion structures located on a side of the insulating material layer away from the substrate, the light-shielding layer is located on a surface of the insulating material layer away from the substrate, and one of the first insulating portions is located on a surface of one of the protrusion structures away from the substrate.

6. The display substrate according to claim 5, characterized in that: The height of the protruding structure is greater than the thickness of the light shielding layer.

7. The display substrate according to claim 5, characterized in that: The protruding structure and the insulating material layer are an integral structure; or the protruding structure and the insulating material layer are separate structures.

8. The display substrate according to claim 5, characterized in that: An edge of an orthographic projection of a surface of the protruding structure facing the substrate on the substrate is located outside an edge of an orthographic projection of a corresponding surface of the first insulating portion facing the substrate on the substrate.

9. The display substrate according to claim 8, characterized in that: A distance between an edge of an orthographic projection of a surface of the protruding structure facing the substrate on the substrate and an edge of an orthographic projection of a surface of the corresponding first insulating portion facing the substrate on the substrate is in a range of 1 μm to 5 μm.

10. The display substrate according to claim 5, characterized in that: The display substrate further includes a touch structure layer located between the light emitting layer and the first insulating layer. The touch structure layer includes a touch electrode layer and an insulating protection layer covering the touch electrode layer. The insulating material layer includes the insulating protection layer.

11. The display substrate according to any one of claims 1 to 10, characterized in that: The second insulating layer includes a plurality of color filter portions arranged at intervals; in at least some of the color filter portions, each of the color filter portions covers a side surface of the first insulating portion and a surface away from the substrate.

12. The display substrate according to claim 11, characterized in that: The second insulating layer includes a red filter portion and a non-red filter portion, and one of the non-red filter portions covers a side surface of one of the first insulating portions and a surface away from the substrate; the first insulating layer also includes multiple second insulating portions, and the second insulating portions are provided with through holes, one of the through holes is filled with a red filter portion, and the refractive index of the second insulating portion is smaller than the refractive index of the red filter portion, and the difference between the refractive index of the red filter portion and the refractive index of the second insulating portion is greater than the difference between the refractive index of the first insulating portion and the refractive index of the red filter portion.

13. The display substrate according to claim 12, characterized in that: The display substrate also includes a pixel defining layer located between the substrate and the first insulating layer, the pixel defining layer is provided with a plurality of pixel openings, each of the sub-pixels is at least partially located within one of the pixel openings, and the pixel openings define the light-emitting area; the orthographic projection of each through hole on the substrate toward the bottom surface of the substrate covers the orthographic projection of one of the pixel openings on the substrate toward the bottom surface of the substrate.

14. The display substrate according to claim 13, characterized in that: The edge of the through hole's orthographic projection on the substrate toward the bottom surface of the substrate is a first edge, the edge of the pixel opening's orthographic projection on the substrate toward the bottom surface of the substrate is a second edge, and the distance between the first edge of the through hole and the corresponding second edge of the pixel opening is less than or equal to 2 μm.

15. The display substrate according to claim 1, characterized in that: The display substrate also includes a pixel defining layer located between the substrate and the first insulating layer, the pixel defining layer is provided with a plurality of pixel openings, the sub-pixels are at least partially located in one of the pixel openings, and the pixel openings define the light-emitting area; the orthographic projection of each of the first insulating portions on the substrate toward the bottom surface of the substrate covers the orthographic projection of one of the pixel openings on the substrate toward the bottom surface of the substrate.

16. The display substrate according to claim 15, characterized in that: The edge of the orthographic projection of the first insulating portion toward the bottom surface of the substrate on the substrate is the third edge, the edge of the orthographic projection of the pixel opening toward the bottom surface of the substrate on the substrate is the second edge, and the distance between the third edge of the first insulating portion and the corresponding second edge of the pixel opening ranges from 0.5μm to 2μm.

17. The display substrate according to claim 1, characterized in that: In a direction from the first insulating portion to the substrate, the side surface of the first insulating portion extends outwardly in an inclined manner; and the angle between the side surface of the first insulating portion and the surface of the substrate is in a range of 55° to 85°.

18. The display substrate according to claim 1, characterized in that: The light shielding layer is located on a side of the first insulating layer away from the substrate, and a distance from a surface of the light shielding layer facing the substrate to the substrate is greater than or equal to a distance from a surface of the first insulating portion away from the substrate to the substrate.

19. The display substrate according to claim 1, characterized in that: The display substrate further includes an encapsulation layer located between the light emitting layer and the light shielding layer.

20. A display device, characterized in that: The display device comprises the display substrate according to any one of claims 1 to 19.

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