Display substrate and display device

Abstract

The utility model provides a display substrate and a display device. The display substrate comprises a substrate, a light emitting structure layer, a first light shielding layer and a second light shielding layer. The light-emitting structure layer is located on one side of the substrate; the light-emitting structure layer comprises a plurality of sub-pixels. The first light shielding layer is located on the side, away from the substrate, of the light emitting structure layer. The first shading layer is provided with a plurality of first through holes, and the orthographic projection of each first through hole on the substrate covers the orthographic projection of the light-emitting area of one sub-pixel on the substrate. The second light shielding layer is located on the side, away from the substrate, of the first light shielding layer. The second shading layer is provided with a plurality of second through holes, and the orthographic projection of each second through hole on the substrate covers the orthographic projection of one first through 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 embodiments of this application, a display substrate is provided. The display substrate includes:

[0005] Substrate;

[0006] A light-emitting structure layer is located on one side of the substrate; the light-emitting structure layer includes a plurality of sub-pixels;

[0007] A first light-shielding layer is located on the side of the light-emitting structure layer away from the substrate; the first light-shielding layer is provided with a plurality of first through holes, and the orthographic projection of each first through hole on the substrate covers the orthographic projection of the light-emitting area of ​​one of the sub-pixels on the substrate;

[0008] The second light-shielding layer is located on the side of the first light-shielding layer away from the substrate; the second light-shielding layer is provided with a plurality of second through holes, and the orthogonal projection of each second through hole on the substrate covers the orthogonal projection of one of the first through holes on the substrate.

[0009] In one embodiment, the edge of the orthographic projection of each of the first through holes on the substrate is located inside the edge of the orthographic projection of the corresponding second through hole on the substrate.

[0010] In one embodiment, the distance between the edge of the orthographic projection of each of the second vias on the substrate and the edge of the orthographic projection of the corresponding first via on the substrate is less than or equal to 5 μm.

[0011] In one embodiment, the display substrate further includes a light enhancement structure located on the side of the light-emitting structure layer away from the substrate; the light enhancement structure includes a first insulating layer and a second insulating layer, wherein the refractive index of the first insulating layer is less than the refractive index of the second insulating layer; the first insulating layer has a plurality of openings, and the orthographic projection of each opening on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the second insulating layer includes a plurality of spaced insulating portions, and each opening is filled by one of the insulating portions.

[0012] In one embodiment, the display substrate further includes a planarization layer located on the side of the light-enhancing structure away from the substrate, the planarization layer and the second insulating layer being an integral structure.

[0013] In one embodiment, the second light-shielding layer is located on the side of the first insulating layer away from the substrate.

[0014] In one embodiment, the orthogonal projection of the second light-shielding layer onto the substrate covers the orthogonal projection of the surface of the first insulating layer away from the substrate onto the substrate.

[0015] In one embodiment, the second light-shielding layer is located between the planarization layer and the first insulating layer.

[0016] In one embodiment, the display substrate further includes a color filter layer, the color filter layer including a plurality of spaced color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; each color filter layer is multiplexed as the second insulating layer.

[0017] In one embodiment, the color filter layer is located on the side of the first insulating layer away from the substrate; the second light-shielding layer is located on the side of the color filter layer away from the substrate.

[0018] In one embodiment, the surface of the color filter layer away from the substrate is a continuous surface and is substantially planar.

[0019] In one embodiment, the second light-shielding layer is located on the side of the first insulating layer away from the substrate, and the color filter layer is partially located on the side of the second light-shielding layer away from the substrate.

[0020] In one embodiment, the refractive index of the first insulating layer is in the range of 1.45 to 1.5, and the refractive index of the second insulating layer is in the range of 1.6 to 1.75.

[0021] In one embodiment, the display substrate further includes a color filter layer, the color filter layer including a plurality of spaced-apart color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the light enhancement structure is located on the side of the color filter layer away from the substrate.

[0022] In one embodiment, the first insulating layer covers the side surface of the first light-shielding layer and the surface away from the substrate, and the second light-shielding layer covers the portion of the first insulating layer away from the substrate.

[0023] In one embodiment, the display substrate includes a color filter layer, the color filter layer including a plurality of spaced-apart color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the color filter layer is reused as the first insulating layer.

[0024] In one embodiment, the display substrate includes a color filter layer, the color filter layer including a plurality of spaced-apart color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the color filter layer is located on the side of the light enhancement structure away from the substrate.

[0025] In one embodiment, the display substrate further includes a touch structure layer located on the side of the light-emitting structure layer away from the substrate; 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, a first touch insulating layer located between the first touch electrode layer and the second touch electrode layer, and a second touch insulating layer located on the side of the second touch electrode layer away from the substrate; the first insulating layer is reused as the second touch insulating layer.

[0026] In one embodiment, each of the insulating portions is located within a first through hole.

[0027] In one embodiment, the refractive index of the first insulating layer is in the range of 1.5 to 1.6, and the refractive index of the second insulating layer is in the range of 1.7 to 1.8.

[0028] In one embodiment, the second light-shielding layer is located on the side of the color filter layer away from the substrate; and / or, the first light-shielding layer is covered by the color filter layer.

[0029] In one embodiment, the slope angle of the opening ranges from 45° to 85°.

[0030] According to a second aspect of the present application, a display device is provided, the display device including the display substrate described above.

[0031] The display substrate and display device provided in this application embodiment, by providing a first light-shielding layer located on the side of the light-emitting structure layer away from the substrate and a second light-shielding layer located on the side of the first light-shielding layer away from the substrate, and the orthogonal projection of each second through hole of the second light-shielding layer on the substrate covers the orthogonal projection of a first through hole of the first light-shielding layer on the substrate, can cause the diffracted light generated by external ambient light incident on the first light-shielding layer to cancel out the diffracted light generated by external ambient light incident on the second light-shielding layer, thereby improving the color separation phenomenon of the display substrate in the non-display state and helping to improve the user experience; and by providing the display substrate including the first light-shielding layer and the second light-shielding layer, the reflectivity of external ambient light can be effectively reduced, and the dark state integrated black effect of the display substrate in the non-display state can be improved. Attached Figure Description

[0032] Figure 1 This is a partial cross-sectional view of a display substrate provided in an exemplary embodiment of this application;

[0033] Figure 2 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0034] Figure 3 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0035] Figure 4 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0036] Figure 5 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0037] Figure 6 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0038] Figure 7 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0039] Figure 8 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application;

[0040] Figure 9 This is a partial cross-sectional view of a display substrate provided in another exemplary embodiment of this application. Detailed Implementation

[0041] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0042] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture; if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0043] This application provides a display substrate. For example... Figure 1 As shown, the display substrate includes a substrate 10, a light-emitting structure layer 20, a first light-shielding layer 31, and a second light-shielding layer 32. The light-emitting structure layer 20 is located on one side of the substrate 10; the light-emitting structure layer 20 includes a plurality of sub-pixels 21. The first light-shielding layer 31 is located on the side of the light-emitting structure layer 20 away from the substrate 10; the first light-shielding layer has a plurality of first through-holes 311, and the orthographic projection of each first through-hole 311 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 second light-shielding layer 32 is located on the side of the first light-shielding layer 31 away from the substrate 10; the second light-shielding layer 32 has a plurality of second through-holes 321, and the orthographic projection of each second through-hole 321 on the substrate 10 covers the orthographic projection of one of the first through-holes 311 on the substrate 10.

[0044] The display substrate provided in this application embodiment, by providing a first light-shielding layer 31 located on the side of the light-emitting structure layer 20 away from the substrate 10 and a second light-shielding layer 32 located on the side of the first light-shielding layer 31 away from the substrate 10, and the orthogonal projection of each second through hole 321 of the second light-shielding layer 32 on the substrate 10 covers the orthogonal projection of a first through hole 311 of the first light-shielding layer 31 on the substrate 10, can cause the diffracted light generated by external ambient light incident on the first light-shielding layer 31 to cancel out the diffracted light generated by external ambient light incident on the second light-shielding layer 32, thereby improving the color separation phenomenon of the display substrate in the non-display state and helping to improve the user experience; and by providing the display substrate including the first light-shielding layer 31 and the second light-shielding layer 32, the reflectivity of external ambient light can be effectively reduced, improving the dark state integrated black effect of the display substrate in the non-display state.

[0045] 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.

[0046] In one embodiment, such as Figure 1 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.

[0047] In one embodiment, such as Figure 1 As shown, the pixel circuit includes 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.

[0048] In one embodiment, such as Figure 1As 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 of the thin film transistor 61 through a through-hole penetrating the planarization layer 66.

[0049] In one embodiment, such as Figure 1 As shown, 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 of the thin-film transistor 61 through a via 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 via 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 1 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 some embodiments, the sub-pixels 21 may further include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer located between the anode and the light-emitting material layer, and may also include at least one of an electron injection layer, an electron transport layer, and a hole blocking layer located between the cathode and the light-emitting material layer.

[0050] In one embodiment, the light-emitting structure layer 20 includes at least three sub-pixels 21 with different light-emitting colors. For example, the light-emitting structure layer 20 includes sub-pixels with red light-emitting color, sub-pixels with green light-emitting color, and sub-pixels with blue light-emitting color.

[0051] In one embodiment, such as Figure 1 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 has a plurality of pixel openings 221. Each pixel opening 221 corresponds to a sub-pixel 21, and each pixel opening 221 exposes at least a portion of the first electrode 211 of the corresponding sub-pixel 21. At least a portion of the light-emitting material layer 212 of each sub-pixel is located within the pixel opening 221. 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 openings 221 of the pixel defining layer 22 can be formed using an exposure and development process, resulting in the shape of the formed pixel openings 221.

[0052] In one embodiment, such as Figure 1 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.

[0053] In one embodiment, such as Figure 1As 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 81, a second touch electrode layer 82 located on the side of the first touch electrode layer 81 away from the substrate 10, a first touch insulating layer 83 located between the first touch electrode layer 81 and the second touch electrode layer 82, and a second touch insulating layer 84 located on the side of the second touch electrode layer 82 away from the substrate 10. The second touch insulating layer 84 covers the second touch electrode layer 82. One of the first touch electrode layer 81 and the second touch electrode layer 82 includes a plurality of first touch electrodes, a plurality of second touch electrodes, and a plurality of first connecting portions, while the other 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. For example, the second touch electrode layer 82 includes a plurality of first touch electrodes, a plurality of second touch electrodes, and a plurality of first connecting portions, while the first touch electrode layer 81 includes a plurality of second connecting portions; or the first touch electrode layer 81 includes a plurality of first touch electrodes, a plurality of second touch electrodes, and a plurality of first connecting portions, while the second touch electrode layer 82 includes a plurality of second connecting portions. The materials of the second touch insulating layer 84 and the first touch insulating layer 83 can be organic or inorganic materials, and the surface of the second touch insulating layer 84 and the first touch insulating layer 83 away from the substrate 10 has good flatness. In some embodiments, the materials of the second touch insulating layer 84 and the first touch insulating layer 83 can be organic resins.

[0054] In one embodiment, such as Figure 1 As shown, the display substrate further includes a color filter layer 40 located on the side of the light-emitting structure layer 20 away from the substrate 10. The color filter layer 40 includes a plurality of color filter portions 41, and the orthographic projection of each color filter portion 41 on the substrate 10 covers the orthographic projection of one of the first through-holes 311 on the substrate 10. Sub-pixels 21 and color filter portions 41 can correspond one-to-one, 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 an emission color of a first color, sub-pixels with an emission color of a second color, and sub-pixels with an emission color of a third 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 μm to 4 μm.

[0055] In one embodiment, such as Figure 1As shown, the color filter layer 40 and the first light-shielding layer 31 are both located on the side of the second touch insulating layer 84 away from the substrate 10. Each color filter portion 41 is partially located within a first through-hole 311 and partially located on the side of the first light-shielding layer 31 away from the substrate 10. In some embodiments, the orthographic projection of each color filter portion 41 on the substrate 10 overlaps with the orthographic projection of the first light-shielding layer 31 on the substrate 10, and the width of the overlapping region ranges from 0 to 10 μm.

[0056] In one embodiment, such as Figure 1 As shown, the display substrate further includes a planarization material layer 74 located on the side of the color filter layer 40 away from the substrate 10. The planarization material layer 74 covers the first light-shielding layer 31 and the surface of the color filter layer 40 away from the substrate 10. In some embodiments, the thickness of the planarization material layer 74 ranges from 2 μm to 5 μm.

[0057] In one embodiment, such as Figure 1 As shown, the display substrate further includes a light-enhancing structure located on the side of the light-emitting structure layer 20 away from the substrate 10. The light-enhancing structure includes a first insulating layer 71 and a second insulating layer 72. The refractive index of the first insulating layer 71 is less than that of the second insulating layer 72. The first insulating layer 71 has a plurality of openings 711, and the orthographic projection of each opening 711 onto the substrate 10 overlaps the orthographic projection of one sub-pixel 21 onto the substrate. The second insulating layer 72 includes a plurality of spaced insulating portions 721, and each opening 711 is filled by one insulating portion 721. With this configuration, after the light emitted by the sub-pixel 21 is incident from the second insulating layer 72 onto the side of the opening 711 of the first insulating layer 71, part of the light undergoes total internal reflection and exits from the side of the opening 711, thereby helping to reduce light loss and improve the light extraction efficiency of the display substrate. In some embodiments, the thickness of the first insulating layer 71 ranges from 1.5 μm to 3 μm.

[0058] In one embodiment, such as Figure 1 As shown, in the direction of the substrate 10 pointing towards the first insulating layer 71, the side of the opening 711 extends obliquely outward. The opening 711 of the first insulating layer 71 can be formed by an exposure and development process, resulting in the shape of the formed opening 711. In this embodiment, when preparing the display substrate, the first insulating layer 71 is formed first, and then the second insulating layer 72 is formed.

[0059] In one embodiment, the slope angle of the opening 711 in the first insulating layer 71 ranges from 45° to 85°. This configuration helps to increase the amount of light that undergoes total internal reflection on the side of the opening 711 in the first insulating layer 71, and further helps to improve the light extraction efficiency of the display substrate.

[0060] In one embodiment, such as Figure 1 As shown, both the first insulating layer 71 and the second insulating layer 72 are located on the side of the color filter layer 40 away from the substrate 10. Specifically, both the first insulating layer 71 and the second insulating layer 72 are located on the side of the planarization material layer 74 away from the substrate 10.

[0061] In one embodiment, both the first insulating layer 71 and the second insulating layer 72 are made of organic resin; the refractive index of the first insulating layer 71 ranges from 1.45 to 1.5, and the refractive index of the second insulating layer 72 ranges from 1.65 to 1.8. Thus, the large difference in refractive index between the second insulating layer 72 and the first insulating layer 71 effectively improves the efficiency of total internal reflection of light emitted from the sub-pixel 21 at the side of the opening 711 in the first insulating layer 71.

[0062] In one embodiment, such as Figure 1 As shown, the display substrate also includes a planarization layer 73 located on the side of the light enhancement structure away from the substrate 10, and the surface of the planarization layer 73 away from the substrate 10 is generally planar.

[0063] In one embodiment, such as Figure 1 As shown, the planarization layer 73 and the second insulating layer 72 are an integral structure. This configuration allows the planarization layer 73 and the second insulating layer 72 to be formed simultaneously in the same process step, which helps simplify the fabrication process of the display substrate.

[0064] In one embodiment, such as Figure 1 As shown, the second light-shielding layer 32 is located on the side of the first insulating layer 71 away from the substrate 10. Since the refractive index of the planarization layer 73 is greater than that of the first insulating layer 71, if the planarization layer 73 is in direct contact with the first insulating layer 71, ambient light incident on the interface between the planarization layer 73 and the first insulating layer 71 will be reflected, resulting in high reflectivity of ambient light and causing color separation in the non-display state of the display substrate. By positioning the second light-shielding layer 32 on the side of the first insulating layer 71 away from the substrate 10, the reflectivity of ambient light can be effectively reduced, improving the dark-state effect of the display substrate in the non-display state.

[0065] Furthermore, such as Figure 1 As shown, the orthographic projection of the second light-shielding layer 32 on the substrate 10 covers the orthographic projection of the surface of the first insulating layer 71 away from the substrate 10 on the substrate 10. This arrangement prevents external ambient light incident on the display substrate from being reflected off the surface of the first insulating layer 71 away from the substrate 10, further improving the dark state effect of the display substrate in the non-display state.

[0066] In one embodiment, such as Figure 1 As shown, the second light-shielding layer 32 is located between the planarization layer 73 and the first insulating layer 71. Specifically, the second light-shielding layer 32 is in direct contact with the surface of the first insulating layer 71 away from the substrate 10.

[0067] In one embodiment, the edge of the orthographic projection of each of the first through-holes 311 of the first light-shielding layer 31 onto the substrate 10 is located inside the edge of the orthographic projection of the corresponding second through-hole 321 onto the substrate 10. That is, the area of ​​the orthographic projection of the second through-hole 321 of the second light-shielding layer 32 onto the substrate 10 is larger than the area of ​​the orthographic projection of the corresponding first through-hole 311 onto the substrate 10. This configuration results in better destructive interference between the diffracted light generated by ambient light incident on the first light-shielding layer 31 and the diffracted light generated by ambient light incident on the second light-shielding layer 32, thus more effectively improving color separation in the non-display state of the display substrate.

[0068] In one embodiment, such as Figure 1 As shown, in the direction from the substrate 10 to the first light-shielding layer 31, the side surfaces of the first through-hole 311 and the second through-hole 321 both extend outward at an angle. The orthographic projection of the first through-hole 311 onto the substrate 10 refers to the orthographic projection of the bottom surface of the first through-hole 311 onto the substrate 10, and the orthographic projection of the second through-hole 321 onto the substrate 10 refers to the orthographic projection of the bottom surface of the second through-hole 321 onto the substrate 10.

[0069] In one embodiment, such as Figure 1 As shown, the distance between the edge of the orthographic projection of the bottom surface of the pixel opening 221 onto the substrate 10 and the edge of the orthographic projection of the bottom surface of the corresponding first through-hole 311 onto the substrate 10 is a first distance d1, and the distance between the edge of the orthographic projection of the bottom surface of the pixel opening 221 onto the substrate 10 and the edge of the orthographic projection of the bottom surface of the corresponding aperture 711 onto the substrate 10 is a second distance d2. The first distance d1 is less than or equal to the second distance d2. This increases the amount of light emitted by the sub-pixel 21 that undergoes total internal reflection at the side of the aperture 711. In some embodiments, the first distance d1 ranges from 0 to 5 μm, and the second distance d2 ranges from 0 to 3 μm.

[0070] Furthermore, such as Figure 1 As shown, the first distance d1 is smaller than the second distance d2. This can more effectively increase the amount of light emitted by sub-pixel 21 that undergoes total internal reflection at the side of aperture 711.

[0071] Furthermore, such as Figure 1As shown, the distance between the edge of the orthographic projection of the bottom surface of the pixel opening 221 onto the substrate 10 and the edge of the orthographic projection of the bottom surface of the corresponding second through hole 321 onto the substrate 10 is a third distance d3. The first distance d1 is less than or equal to the second distance d2, and the second distance is less than or equal to the third distance d3. Figure 1 In the illustrated embodiment, the first distance d1 is smaller than the second distance d2, and the second distance is smaller than the third distance d3. This arrangement allows for a larger amount of light emitted from the sub-pixel 21, resulting in higher light utilization. Simultaneously, it improves the destructive interference effect between the diffracted light generated by ambient light incident on the first light-shielding layer 31 and the diffracted light generated by ambient light incident on the second light-shielding layer 32. In some embodiments, the first distance d1 ranges from 0 to 5 μm, the second distance d2 ranges from 0 to 3 μm, and the third distance d3 ranges from 2 μm to 6 μm.

[0072] In one embodiment, the distance between the edge of the orthographic projection of each of the second through holes 321 of the second light-shielding layer 32 onto the substrate 10 and the edge of the orthographic projection of the corresponding first through hole 311 onto the substrate 10 is less than or equal to 5 μm. Preferably, the distance between the edge of the orthographic projection of each of the second through holes 321 onto the substrate 10 and the edge of the orthographic projection of the corresponding first through hole 311 onto the substrate 10 is less than or equal to 2 μm. Here, the orthographic projection of the first through hole 311 and the second through hole 321 onto the substrate 10 refers to the orthographic projection of their bottom surfaces onto the substrate 10. Experimental verification shows that within this numerical range, the interference cancellation effect between the diffracted light generated by ambient light incident on the first light-shielding layer 31 and the diffracted light generated by ambient light incident on the second light-shielding layer 32 can be effectively improved, thereby effectively improving the color separation phenomenon of the display substrate in the non-display state.

[0073] In one embodiment, the thickness of the first light-shielding layer 31 ranges from 1 μm to 2 μm, and the thickness of the second light-shielding layer 32 ranges from 1 μm to 2 μm.

[0074] This application is for Figure 1 The display substrate shown, along with a first display substrate, a second display substrate, and a third display substrate used for comparison, were tested. The first display substrate and... Figure 1 Compared to the display substrates shown, the following differences exist: the first display substrate does not include a light enhancement structure, a color filter layer, a first light-shielding layer, and a second light-shielding layer, and a polarizer is provided above the touch structure layer; the second display substrate does not include a light enhancement structure and a second light-shielding layer; and the third display substrate does not include a second light-shielding layer.

[0075] The experiments yielded the following results: Compared to the first display substrate, the power consumption of the second display substrate was reduced by 29.9% and the power consumption of the third display substrate was reduced by 36.7% at the same brightness. Figure 1 The power consumption of the display substrate shown is reduced by 36.9%; the ambient light reflectance of the second display substrate is 7.31%, and the ambient light reflectance of the third display substrate is 7.9%. Figure 1 The ambient light reflectance of the display substrate shown is 6.51%; in the non-display state, the a* value of the hue of the second display substrate is -2.39, and the b* value is -2.27; in the non-display state, the a* value of the hue of the third display substrate is -1.75, and the b* value is -2.04; in the non-display state, Figure 1 The hue of the display substrate shown has an a* value of -0.38 and a b* value of -1.77. Therefore, the display substrate provided in this embodiment can effectively reduce the reflectivity of ambient light, reduce the power consumption of the display substrate, and effectively improve color separation in the non-display state.

[0076] In one embodiment, the display substrate may further include a third light-shielding layer, which may be located between the first and second light-shielding layers, or between the first light-shielding layer and the light-emitting structure layer. The third light-shielding layer has a plurality of third through-holes. When the third light-shielding layer is located between the first and second light-shielding layers, the orthographic projection of each third through-hole on the substrate overlaps the orthographic projection of the corresponding first through-hole on the substrate and falls on the orthographic projection of the corresponding second through-hole on the substrate; preferably, the area of ​​the orthographic projection of each third through-hole on the substrate is larger than the area of ​​the orthographic projection of the corresponding first through-hole on the substrate, and smaller than the area of ​​the orthographic projection of the corresponding second through-hole on the substrate. When the third light-shielding layer is located between the first light-shielding layer and the light-emitting structure layer, the area of ​​the orthographic projection of each third through-hole on the substrate falls on the orthographic projection of the corresponding first through-hole on the substrate; preferably, the area of ​​the orthographic projection of each third through-hole on the substrate is smaller than the area of ​​the orthographic projection of the corresponding first through-hole on the substrate.

[0077] This application embodiment also provides another display substrate, such as... Figure 2 As shown. This embodiment mainly introduces and Figure 1 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 1 The introduction will not be repeated here.

[0078] In this embodiment, such as Figure 2As shown, the first light-shielding layer 31 covers the second touch electrode layer 82, meaning the first light-shielding layer 31 is reused as the second touch insulating layer 84. This configuration simplifies the structure of the display substrate and the manufacturing process. In this embodiment, the color filter layer 40 is in direct contact with the surface of the first touch insulating layer 83 away from the substrate 10, and each color filter portion 41 is located within a first through-hole 311.

[0079] This application embodiment also provides another display substrate, such as... Figure 3 As shown. This embodiment mainly introduces and Figure 1 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 1 The introduction will not be repeated here.

[0080] In this embodiment, such as Figure 3 As shown, the first insulating layer 71 covers the side surface of the first light-shielding layer 31 and the surface away from the substrate 10, and the second light-shielding layer 32 covers the portion of the first insulating layer 71 away from the substrate 10. That is, the edge of the orthographic projection of the first through-hole 311 on the substrate 10 is located inside the edge of the orthographic projection of the corresponding opening 711 on the substrate 10.

[0081] In this embodiment, such as Figure 3 As shown, the first distance d1 is greater than the second distance d2, and both the first distance d1 and the second distance d2 are less than the third distance d3.

[0082] This application also provides another type of display substrate, such as... Figure 4 As shown. This embodiment mainly introduces and Figure 1 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 1 The introduction will not be repeated here.

[0083] In this embodiment, such as Figure 4 As shown, the color filter layer 40 is reused as a second insulating layer 72, and each color filter portion 41 at least partially fills an opening 711. This configuration helps to reduce the thickness and structural complexity of the display substrate and simplifies the manufacturing process of the display substrate.

[0084] In this embodiment, the refractive index of the first insulating layer 71 is in the range of 1.45 to 1.5, and the refractive index of the second insulating layer 72, which is also the color filter layer 40, is in the range of 1.6 to 1.75. The large difference in refractive index between the second insulating layer 72 and the first insulating layer 71 effectively improves the total internal reflection efficiency of light incident on the side of the opening 711 of the first insulating layer 71.

[0085] In this embodiment, the thickness of the color filter layer 40 is greater than or equal to the thickness of the first insulating layer 71, and all sides of the first insulating layer 71 are in contact with the color filter portion 41. This ensures that the entire area of ​​the side of the opening 711 of the first insulating layer 71 allows total internal reflection of the light emitted by the sub-pixel 21, which helps to improve the utilization rate of light. Furthermore, the thickness of the color filter layer 40 is less than or equal to 5 μm.

[0086] Furthermore, such as Figure 4 As shown, the thickness of the color filter layer 40 is greater than the thickness of the first insulating layer 71. Each color filter portion 41 is partially located in the corresponding opening 711, partially located on the side of the first insulating layer 71 away from the substrate 10, and covers at least a portion of the surface of the first insulating layer 71 away from the substrate 10.

[0087] Furthermore, the surface of the color filter layer 40 away from the substrate 10 is a continuous surface and is substantially planar, meaning that the sides of adjacent color filter portions 41 are connected, and the entire surface of the first insulating layer 71 away from the substrate 10 is covered by the color filter layer 40. The second light-shielding layer 32 is located between the color filter layer 40 and the planarization layer 73, and the second light-shielding layer 32 covers the positions where adjacent color filter portions 41 are connected in the color filter layer 40. This configuration results in a smaller discontinuity in the color filter layer 40, preventing breakage of the second light-shielding layer 32 formed on top of it and improving the film quality of the second light-shielding layer 32. The statement that the surface of the color filter layer 40 away from the substrate 10 is substantially planar means that the difference between the maximum distance and the minimum distance from the surface of the color filter layer 40 away from the substrate 10 is very small; for example, the difference between the maximum and minimum distances is less than or equal to 10% of the maximum distance.

[0088] In this embodiment, such as Figure 4 As shown, the first light-shielding layer 31 covers the second touch electrode layer 82, meaning the first light-shielding layer 31 is reused as the second touch insulating layer 84. This configuration simplifies the structure of the display substrate and the fabrication process. In this embodiment, the color filter layer 40 is in direct contact with the surface of the first touch insulating layer 83 away from the substrate 10.

[0089] In this embodiment, such as Figure 4 As shown, the first insulating layer 71 covers the side surface of the first light-shielding layer 31 and the surface away from the substrate 10, and the second light-shielding layer 32 covers the portion of the first insulating layer 71 away from the substrate 10. That is, the edge of the orthographic projection of the first through-hole 311 on the substrate 10 is located inside the edge of the orthographic projection of the corresponding opening 711 on the substrate 10.

[0090] In this embodiment, such as Figure 4As shown, the first distance d1 is greater than the second distance d2, and both the first distance d1 and the second distance d2 are less than the third distance d3. The range of the first distance d1 is 0 to 5 μm, the range of the second distance d2 is 0 μm to 3 μm, and the range of the third distance d3 is 2 μm to 6 μm.

[0091] In this embodiment, the planarization layer 73 and the second insulating layer 72 are made of different materials, and the planarization layer 73 and the second insulating layer 72 are formed in different process steps.

[0092] This application also provides another type of display substrate, such as... Figure 5 As shown. This embodiment mainly introduces and Figure 4 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 4 The introduction will not be repeated here.

[0093] In this embodiment, such as Figure 5 As shown, the first light-shielding layer 31 is located on the side of the color filter layer 40 facing the substrate 10.

[0094] In this embodiment, such as Figure 5 As shown, the display substrate further includes a planarization material layer 74 located on the side of the first light-shielding layer 31 away from the substrate 10, the planarization material layer 74 covering the surface of the first light-shielding layer 31 away from the substrate 10. In some embodiments, the thickness of the planarization material layer 74 ranges from 2 μm to 5 μm.

[0095] In this embodiment, such as Figure 5 As shown, the first distance d1 is less than the second distance d2, and the second distance d2 is less than the third distance d3.

[0096] This application also provides another type of display substrate, such as... Figure 6 As shown. This embodiment mainly introduces and Figure 4 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 4 The introduction will not be repeated here.

[0097] In this embodiment, such as Figure 6 As shown, the second light-shielding layer 32 is located on the side of the first insulating layer 71 away from the substrate, and the color filter layer 40 is partially located on the side of the second light-shielding layer 32 away from the substrate 10.

[0098] This application also provides another type of display substrate, such as... Figure 7 As shown. This embodiment mainly introduces and Figure 1 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 1The introduction will not be repeated here.

[0099] In this embodiment, such as Figure 7 As shown, the first insulating layer 71 and the second insulating layer 72 of the light enhancement structure are located between the color filter layer 40 and the light-emitting structure layer 20.

[0100] In this embodiment, such as Figure 7 As shown, the first insulating layer 71 covers the side surfaces of each insulating portion 721 and the surface of each insulating portion 721 away from the substrate 10.

[0101] In this embodiment, such as Figure 7 As shown, in the direction of the substrate 10 pointing towards the first insulating layer 71, the side of the opening 711 extends obliquely inward. During the fabrication of the display substrate, the second insulating layer 72 is formed before the first insulating layer 71.

[0102] In this embodiment, such as Figure 7 As shown, the second light-shielding layer 32 is located on the side of the color filter layer 40 away from the substrate 10.

[0103] Furthermore, the surface of the color filter layer 40 away from the substrate is a continuous plane, and is generally planar. This prevents the second light-shielding layer 32 from breaking.

[0104] In this embodiment, each of the insulating portions 721 is located within a first through hole 311 of the first light-shielding layer 31 and is spaced apart from the side of the first through hole 311.

[0105] In this embodiment, the first light-shielding layer 31 covers the second touch electrode layer 82, that is, the first light-shielding layer 31 is reused as the second touch insulating layer 84; the insulating portion 721, the first insulating layer 71, and the first light-shielding layer 31 are in direct contact with the first touch insulating layer 83. By setting the first light-shielding layer 31 to reuse the second touch insulating layer 84, the structure of the display substrate can be simplified, and the manufacturing process of the display substrate can be simplified.

[0106] In this embodiment, such as Figure 7 As shown, the first distance d1 is greater than the second distance d2, and both the first distance d1 and the second distance d2 are less than the third distance d3. The range of the first distance d1 is 0 to 5 μm, the range of the second distance d2 is 0 to 2 μm, and the range of the third distance d3 is 2 μm to 6 μm.

[0107] In this embodiment, both the first insulating layer 71 and the second insulating layer 72 are made of organic resin; the refractive index of the first insulating layer 71 ranges from 1.45 to 1.5, and the refractive index of the second insulating layer 72 ranges from 1.65 to 1.8. Thus, the large difference in refractive index between the second insulating layer 72 and the first insulating layer 71 effectively improves the total internal reflection efficiency of light incident on the side of the opening 711 of the first insulating layer 71.

[0108] This application also provides another type of display substrate, such as... Figure 8 As shown. This embodiment mainly introduces and Figure 7 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 7 The introduction will not be repeated here.

[0109] In this embodiment, such as Figure 8 As shown, the first light-shielding layer 31 is located on the side of the first insulating layer 71 away from the substrate 10.

[0110] In this embodiment, such as Figure 8 As shown, each of the color filter portions 41 is partially located within a first through-hole 311 of the first light-shielding layer 31.

[0111] In this embodiment, such as Figure 8 As shown, the first insulating layer 71 is reused as the second touch insulating layer 84. This helps to simplify the structure and manufacturing process of the display substrate.

[0112] This application also provides another type of display substrate, such as... Figure 9 As shown. This embodiment mainly introduces and Figure 7 The differences shown are those of the display substrates; for similarities, please refer to the section on... Figure 7 The introduction will not be repeated here.

[0113] In this embodiment, such as Figure 9 As shown, the color filter layer 40 is reused as the first insulating layer 71. This configuration simplifies the structural complexity of the display substrate and the fabrication process, while reducing the number of masks used in the fabrication process.

[0114] In this embodiment, such as Figure 9 As shown, the surface of the color filter layer 40 away from the substrate 10 is non-planar, the height of the portion of the color filter layer 40 away from the substrate 10 that is opposite to the insulating portion 721 is greater than the height of other areas, and the area of ​​the color filter layer 40 away from the substrate 10 that is in contact with the second light-shielding layer 32 is approximately planar.

[0115] In this embodiment, the refractive index of the first insulating layer 71, which is also the color filter layer 40, is in the range of 1.5 to 1.6, and the refractive index of the second insulating layer 72 is in the range of 1.7 to 1.8. Thus, the difference in refractive index between the second insulating layer 72 and the first insulating layer 71 is relatively large, which can effectively improve the total internal reflection efficiency of light incident on the side of the opening 711 of the first insulating layer 71.

[0116] This application also provides a display device. The display device includes the display substrate described in any of the above embodiments.

[0117] 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.

[0118] In one embodiment, the display device further includes a housing, and the display substrate is disposed within the housing.

[0119] 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.

[0120] The cross-sectional view in this embodiment is a partial schematic diagram obtained by cutting the display substrate along a direction perpendicular to the stacking direction of the film layers.

[0121] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display substrate, characterized in that, The display substrate includes: Substrate; A light-emitting structure layer is located on one side of the substrate; the light-emitting structure layer includes a plurality of sub-pixels; A first light-shielding layer is located on the side of the light-emitting structure layer away from the substrate; the first light-shielding layer is provided with a plurality of first through holes, and the orthographic projection of each first through hole on the substrate covers the orthographic projection of the light-emitting area of ​​one of the sub-pixels on the substrate; The second light-shielding layer is located on the side of the first light-shielding layer away from the substrate; the second light-shielding layer is provided with a plurality of second through holes, and the orthogonal projection of each second through hole on the substrate covers the orthogonal projection of one of the first through holes on the substrate.

2. The display substrate according to claim 1, characterized in that, The edge of the orthographic projection of each of the first through holes on the substrate is located inside the edge of the orthographic projection of the corresponding second through hole on the substrate.

3. The display substrate according to claim 2, characterized in that, The distance between the edge of the orthographic projection of each second through hole on the substrate and the edge of the orthographic projection of the corresponding first through hole on the substrate is less than or equal to 5 μm.

4. The display substrate according to claim 1, characterized in that, The display substrate further includes a light enhancement structure located on the side of the light-emitting structure layer away from the substrate; the light enhancement structure includes a first insulating layer and a second insulating layer, wherein the refractive index of the first insulating layer is less than the refractive index of the second insulating layer; the first insulating layer has a plurality of openings, and the orthographic projection of each opening on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the second insulating layer includes a plurality of spaced insulating portions, and each opening is filled by one of the insulating portions.

5. The display substrate according to claim 4, characterized in that, The display substrate further includes a planarization layer located on the side of the light enhancement structure away from the substrate, and the planarization layer and the second insulating layer are an integral structure.

6. The display substrate according to claim 5, characterized in that, The second light-shielding layer is located on the side of the first insulating layer away from the substrate.

7. The display substrate according to claim 6, characterized in that, The orthogonal projection of the second light-shielding layer on the substrate covers the orthogonal projection of the surface of the first insulating layer away from the substrate on the substrate.

8. The display substrate according to claim 5, characterized in that, The second light-shielding layer is located between the planarization layer and the first insulating layer.

9. The display substrate according to claim 4, characterized in that, The display substrate further includes a color filter layer, which includes a plurality of spaced color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; each color filter layer is reused as the second insulating layer.

10. The display substrate according to claim 9, characterized in that, The color filter layer is located on the side of the first insulating layer away from the substrate; the second light-shielding layer is located on the side of the color filter layer away from the substrate.

11. The display substrate according to claim 10, characterized in that, The surface of the color filter layer away from the substrate is a continuous surface and is substantially planar.

12. The display substrate according to claim 9, characterized in that, The second light-shielding layer is located on the side of the first insulating layer away from the substrate, and the color filter layer is partially located on the side of the second light-shielding layer away from the substrate.

13. The display substrate according to claim 9, characterized in that, The refractive index of the first insulating layer is in the range of 1.45 to 1.5, and the refractive index of the second insulating layer is in the range of 1.6 to 1.

75.

14. The display substrate according to claim 4, characterized in that, The display substrate further includes a color filter layer, which includes a plurality of spaced-apart color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; The light-enhancing structure is located on the side of the color filter layer away from the substrate.

15. The display substrate according to claim 4, characterized in that, The first insulating layer covers the side surface of the first light-shielding layer and the surface away from the substrate, and the second light-shielding layer covers the portion of the first insulating layer away from the substrate.

16. The display substrate according to claim 4, characterized in that, The display substrate includes a color filter layer, which includes a plurality of spaced-apart color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the color filter layer is reused as the first insulating layer.

17. The display substrate according to claim 4, characterized in that, The display substrate includes a color filter layer, which includes a plurality of spaced-apart color filter portions; the orthographic projection of each color filter portion on the substrate covers the orthographic projection of one of the sub-pixels on the substrate; the color filter layer is located on the side of the light enhancement structure away from the substrate.

18. The display substrate according to claim 17, characterized in that, The display substrate further includes a touch structure layer located on the side of the light-emitting structure layer away from the substrate; 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, a first touch insulating layer located between the first touch electrode layer and the second touch electrode layer, and a second touch insulating layer located on the side of the second touch electrode layer away from the substrate; the first insulating layer is reused as the second touch insulating layer.

19. The display substrate according to claim 16 or 17, characterized in that, Each of the insulating portions is located within a first through hole.

20. The display substrate according to claim 16, characterized in that, The refractive index of the first insulating layer is in the range of 1.5 to 1.6, and the refractive index of the second insulating layer is in the range of 1.7 to 1.

8.

21. The display substrate according to claim 16 or 17, characterized in that, The second light-shielding layer is located on the side of the color filter layer away from the substrate; and / or, the first light-shielding layer is covered by the color filter layer.

22. The display substrate according to claim 4, characterized in that, The slope angle of the opening ranges from 45° to 85°.

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

Images