Display substrate and display device

Abstract

The display substrate and display device provided by the present disclosure include a base substrate; a plurality of light-emitting devices located on the base substrate; a plurality of photosensitive devices, wherein the orthographic projection of each photosensitive device on the base substrate is located within the orthographic projection of at least part of the gap between the light-emitting devices on the base substrate; a black matrix including a plurality of first openings and a plurality of second openings, wherein the orthographic projections of the plurality of first openings on the base substrate overlap with the orthographic projections of the plurality of light-emitting devices on the base substrate, and the orthographic projections of the plurality of second openings on the base substrate overlap with the orthographic projections of the plurality of photosensitive devices on the base substrate; a light-guiding structure, wherein the orthographic projection of the light-guiding structure on the base substrate overlaps with the orthographic projections of the plurality of photosensitive devices on the base substrate, and a sidewall of the light-guiding structure has a preset slope angle with the base substrate; and a transparent layer at least covering the light-guiding structure, wherein the refractive index of the transparent layer is different from the refractive index of the light-guiding structure.

Description

Technical Field

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

[0002] With the rapid development of the information industry, biometric technology has been increasingly widely used. In particular, fingerprints are innate, unique, and distinguishable features of the human body. They consist of a series of valleys and ridges on the surface of the fingertip skin, often including details such as bifurcations, ridge terminations, tent-like arches, left-handed, right-handed, spiral, or double spirals. These details determine the unique characteristics of fingerprints and can therefore be used to verify user identities. Based on this, fingerprint recognition technology has been widely used in various fields, including mobile devices and smart homes, providing security for user information. Summary of the Invention

[0003] The embodiments of the present disclosure provide a display substrate and a display device to solve the problem of unsatisfactory fingerprint recognition effect in the prior art.

[0004] Therefore, an embodiment of the present disclosure provides a display substrate, comprising:

[0005] substrate;

[0006] A plurality of light-emitting devices are located on the substrate;

[0007] a plurality of photosensitive devices, wherein an orthographic projection of each photosensitive device on the substrate is located within at least a portion of a gap between each light-emitting device and an orthographic projection of each photosensitive device on the substrate;

[0008] a black matrix comprising a plurality of first openings and a plurality of second openings, wherein the orthographic projections of the plurality of first openings on the base substrate overlap with the orthographic projections of the plurality of light-emitting devices on the base substrate, and the orthographic projections of the plurality of second openings on the base substrate overlap with the orthographic projections of the plurality of photosensitive devices on the base substrate;

[0009] a light guide structure, wherein an orthographic projection of the light guide structure on the substrate overlaps with an orthographic projection of the plurality of photosensitive devices on the substrate, and a sidewall of the light guide structure has a preset slope angle with the substrate;

[0010] The transparent layer at least covers the light guide structure, and the refractive index of the transparent layer is different from the refractive index of the light guide structure.

[0011] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, the preset slope angle of the light-guiding structure is greater than or equal to arcsin(n2 / n1), wherein n1 is the refractive index of the transparent layer, n2 is the refractive index of the light-guiding structure, and n1 is greater than n2.

[0012] In some embodiments, the display substrate provided in the embodiments of the present disclosure further includes a convex lens structure located between the layer where the light guide structure is located and the layer where the photosensitive devices are located, wherein the orthographic projection of the convex lens structure on the base substrate overlaps with the orthographic projection of the plurality of photosensitive devices on the base substrate;

[0013] The refractive index of the convex lens structure is greater than the refractive index of the light guide structure, and the refractive index of the film layer between the layer where the convex lens structure is located and the layer where the light guide structure is located is equal to the refractive index of the light guide structure.

[0014] In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the light-emitting device includes a first electrode, and the display substrate further includes a pixel defining layer located on a side of the layer where the first electrode is located away from the base substrate, and an inorganic encapsulation layer provided in contact with the light-emitting device on a side of the layer where the light-emitting device is located away from the base substrate;

[0015] The light guide structure and the pixel defining layer are provided in the same layer and with the same material, and the inorganic encapsulation layer is reused as the transparent layer.

[0016] In some embodiments, the above-mentioned display substrate provided in the embodiment of the present disclosure further includes an encapsulation layer and an insulating layer located on the side of the layer where the light-emitting device is located away from the base substrate, the layer where the light-guiding structure is located is located between the encapsulation layer and the insulating layer, and the insulating layer is reused as the transparent layer.

[0017] In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the cross-section of the light guide structure in a direction perpendicular to the base substrate is a regular trapezoid or an inverted trapezoid.

[0018] In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the light-guiding structure is a convex lens structure that bulges in a direction away from the base substrate.

[0019] In some embodiments, the above-mentioned display substrate provided in the embodiments of the present disclosure further includes an interlayer dielectric layer, a first gate insulating layer, and a second gate insulating layer sequentially arranged on the side of the layer where the light-emitting device is located facing the base substrate, and the convex lens structure is arranged in the same layer and with the same material as at least one of the interlayer dielectric layer, the first gate insulating layer, and the second gate insulating layer.

[0020] In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the slope angle of the convex lens structure is greater than or equal to 45° and less than 90°.

[0021] In some embodiments, in the above-mentioned display substrate provided by the embodiments of the present disclosure, the multiple photosensitive devices are located on a side of the base substrate away from the layer where the multiple light-emitting devices are located.

[0022] In some embodiments, the display substrate provided in the embodiments of the present disclosure further includes a planar layer located between the layer where the multiple light-emitting devices are located and the base substrate, and the multiple photosensitive devices are located between the planar layer and the base substrate.

[0023] Based on the same inventive concept, an embodiment of the present disclosure provides a display device, including the above-mentioned display substrate provided by an embodiment of the present disclosure.

[0024] The beneficial effects of the present disclosure are as follows:

[0025] The display substrate and display device provided by the embodiments of the present disclosure include a base substrate; a plurality of light-emitting devices located on the base substrate; a plurality of photosensitive devices, wherein the orthographic projection of each photosensitive device on the base substrate is located within the orthographic projection of at least part of the gap between the light-emitting devices on the base substrate; a black matrix including a plurality of first openings and a plurality of second openings, wherein the orthographic projections of the plurality of first openings on the base substrate overlap with the orthographic projections of the plurality of light-emitting devices on the base substrate, and the orthographic projections of the plurality of second openings on the base substrate overlap with the orthographic projections of the plurality of photosensitive devices on the base substrate; a light-guiding structure, wherein the orthographic projection of the light-guiding structure on the base substrate overlaps with the orthographic projections of the plurality of photosensitive devices on the base substrate, and a sidewall of the light-guiding structure has a preset slope angle with the base substrate; and a transparent layer at least covering the light-guiding structure, wherein the refractive index of the transparent layer is different from the refractive index of the light-guiding structure. In the present disclosure, light emitted by the light-emitting device passes through the first opening and hits the ridges and valleys of the finger before being reflected. The reflected light then passes through the second opening and the transparent layer to hit the light-guiding structure. Because the sidewalls of the light-guiding structure and the substrate have a preset slope angle, and the refractive index of the transparent layer surrounding the light-guiding structure is different from that of the light-guiding structure, the reflected light at a large angle can be reflected at the interface between the sidewalls of the light-guiding structure and the transparent layer, converging onto the photosensitive device. Simultaneously, the reflected light at a small angle can pass through the transparent layer and hit the photosensitive device. Consequently, the present disclosure increases the utilization of light reflected from the finger, which helps improve fingerprint recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a display substrate provided in an embodiment of the present disclosure;

[0027] Figure 2A diagram illustrating the light focusing principle of a display substrate provided in an embodiment of the present disclosure;

[0028] Figure 3 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0029] Figure 4 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0030] Figure 5 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0031] Figure 6 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0032] Figure 7 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0033] Figure 8 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0034] Figure 9 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0035] Figure 10 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure;

[0036] Figure 11 A schematic diagram of another structure of a display substrate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. It should be noted that the sizes and shapes of the figures in the drawings do not reflect the actual proportions, and the purpose is only to illustrate the contents of the present disclosure. And the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of known functions and known components.

[0038] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second" and similar terms used in this disclosure and the claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Inside", "outside", "upper", "lower" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] In the display panel industry, full-screen displays are becoming a growing trend. Consequently, in-screen fingerprint recognition has become a research focus. Because the new technology of integrating a color filter on encapsulation (COE) layer can replace circular polarizers (Pols), and color filter layers are thinner than circular polarizers, making them more suitable for flexible displays such as foldable, curled, and rolled displays, products combining COE technology with in-screen fingerprint recognition have become a research priority.

[0040] In on-screen fingerprint recognition products that incorporate COE technology, the black matrix of the color filter layer includes multiple first openings and multiple second openings. Light emitted by the light-emitting device passes through the first openings and is reflected by the ridges and valleys of the finger. The reflected light then passes through the second openings and is irradiated by the photosensitive device. The reflected light intensities in the valleys and ridges are different, and the photosensitive device generates different electrical signals based on the differences in reflected light intensities. Ultimately, a fingerprint image is generated by processing these different electrical signals. However, in related art, only light reflected at small angles (for example, within 5° of the perpendicular direction of the substrate) can reach the photosensitive device (sensor). Light reflected at large angles cannot reach the photosensitive device, resulting in light loss and unsatisfactory fingerprint recognition results.

[0041] In order to solve the above technical problems existing in the related art, the present disclosure provides a display substrate, such as Figures 1 to 3 Shown, including:

[0042] Base substrate 101, optionally, the base substrate 101 is a flexible substrate made of polyimide (PI) or other materials;

[0043] A plurality of light-emitting devices 102 are located on a substrate 101. Optionally, the plurality of light-emitting devices 102 are arranged in an array on the substrate 101. The light-emitting devices 102 may include a first electrode 1021, a light-emitting functional layer 1022, and a second electrode 1023 that are stacked. The light-emitting functional layer 1022 includes, but is not limited to, a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting material layer, a hole blocking layer, a hole transport layer, and an electron injection layer. The light-emitting devices 102 may emit red light, green light, blue light, etc.

[0044] Multiple photosensitive devices 103, wherein the orthographic projection of each photosensitive device 103 on the substrate 101 is located within the orthographic projection of at least a portion of the gap between each light-emitting device 102 on the substrate 101; the photosensitive device 103 may include a stacked bottom electrode 1031, a photoelectric conversion layer 1032, and a top electrode 1033, wherein the photoelectric conversion layer 1032 may be a PIN structure, specifically including a P-type semiconductor layer, an I-type semiconductor layer (also called an intrinsic semiconductor layer), and an N-type semiconductor layer; wherein the P-type semiconductor layer is located between the bottom electrode 1031 and the I-type semiconductor layer, and the N-type semiconductor layer is located between the I-type semiconductor layer and the top electrode 1033; alternatively, the N-type semiconductor layer is located between the bottom electrode 1031 and the I-type semiconductor layer, and the P-type semiconductor layer is located between the I-type semiconductor layer and the top electrode 1033, which is not limited here;

[0045] The black matrix 104 includes a plurality of first openings K1 and a plurality of second openings K2. The orthographic projections of the plurality of first openings K1 on the base substrate 101 overlap with the orthographic projections of the plurality of light-emitting devices 102 on the base substrate 101. The orthographic projections of the plurality of second openings K2 on the base substrate 101 overlap with the orthographic projections of the plurality of photosensitive devices 103 on the base substrate 101. Generally, red color resist R, green color resist G, blue color resist B, etc. are provided at the plurality of first openings K1.

[0046] A light guide structure 105, wherein the orthographic projection of the light guide structure 105 on the base substrate 101 overlaps with the orthographic projections of the plurality of photosensitive devices 103 on the base substrate 101, and a preset slope angle α is formed between the sidewall of the light guide structure 105 and the base substrate 101;

[0047] The transparent layer 106 at least covers the light guide structure 105 , and the refractive index of the transparent layer 106 is different from the refractive index of the light guide structure 105 .

[0048] In the display substrate provided in the embodiments of the present disclosure, light emitted by the light-emitting device 102 passes through the first opening K1 and is reflected from the ridges and valleys of the finger. The reflected light then passes through the second opening K2 and the transparent layer 106 to reach the light-guiding structure 105. Because the sidewalls of the light-guiding structure 105 have a predetermined slope angle α with the base substrate 101, and the refractive index of the transparent layer 106 surrounding the light-guiding structure 105 is different from that of the light-guiding structure 105, light reflected at large angles can be reflected at the interface between the sidewalls of the light-guiding structure 105 and the transparent layer 106, converging onto the photosensitive device 103. Simultaneously, light reflected at small angles can pass through the transparent layer 106 and reach the photosensitive device 103. Consequently, the present disclosure increases the utilization of light reflected from the finger, thereby improving fingerprint recognition.

[0049] It should be noted that in the present disclosure, the position and number of the light guide structures 105 can be set according to the range of large-angle reflected light that is not utilized in the related art, so that as much large-angle reflected light as possible can be reflected by the light guide structures 105 onto the photosensitive device 103.

[0050] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, the preset slope angle α of the light guide structure 105 is greater than or equal to arcsin(n2 / n1), wherein n1 is the refractive index of the transparent layer 106, n2 is the refractive index of the light guide structure 105, and n1 is greater than n2, so that the large-angle reflected light irradiated onto the contact surface between the light guide structure 105 and the transparent layer 106 is totally reflected, thereby maximizing the utilization of the large-angle reflected light.

[0051] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 1 and Figure 2 As shown, it can also include a convex lens structure 107 located between the layer where the light-guiding structure 105 is located and the layer where the photosensitive devices 103 are located. The orthographic projection of the convex lens structure 107 on the base substrate 101 overlaps with the orthographic projections of the multiple photosensitive devices 103 on the base substrate 101. The refractive index of the convex lens structure 107 is greater than the refractive index of the light-guiding structure 105, and the refractive index of the film layer between the layer where the convex lens structure 107 is located and the layer where the light-guiding structure 105 is located is equal to the refractive index of the light-guiding structure 105. This arrangement allows the light reflected on the contact surface between the side wall of the light-guiding structure 105 and the transparent layer 106 to illuminate the convex lens structure 107 with a high refractive index (i.e., greater than the refractive index of the light-guiding structure 105) and be refracted on the convex lens structure 107, so that the refracted light will be more inclined to the vertical direction of the base substrate 101, so that it can be better converged to the photosensitive devices 103. In addition, due to Figure 1It can be seen that the reflected light from the finger may be refracted on the surface of the light-guiding structure 105 away from the base substrate 101 and then illuminated onto the convex lens structure 107, and refracted on the convex lens structure 107. After the second refraction, the light is more inclined to the vertical direction of the base substrate 101, further improving the utilization rate of the light and improving the fingerprint recognition effect.

[0052] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 1 and Figure 3 As shown, the device may further include a pixel defining layer 108 located on the side of the layer where the first electrode 1021 is located away from the base substrate 101, and a first inorganic encapsulation layer 109 located on the side of the layer where the light-emitting device 102 is located away from the base substrate 101 and in contact with the light-emitting device 102. The light-guiding structure 105 may be provided in the same layer and with the same material as the pixel defining layer 108, and the first inorganic encapsulation layer 109 may be reused as the transparent layer 106. Optionally, the thickness of the pixel defining layer 108 in a direction perpendicular to the base substrate 101 is 1.5 μm to 2 μm.

[0053] In the present disclosure, “same layer, same material” refers to the use of the same film-forming process to form a film layer for making a specific pattern, and then using the same mask to form a layer structure through a single patterning process. That is, one patterning process corresponds to a mask (mask, also called a photomask). Depending on the specific pattern, a single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and these specific patterns may be at the same height or have the same thickness, or at different heights or have different thicknesses. Therefore, in the present disclosure, the light-guiding structure 105 and the pixel defining layer 108 are arranged in the same layer and with the same material, which can avoid the additional patterning process of the light-guiding structure 105, and at the same time avoid the additional film layer of the light-guiding structure 105, which is beneficial to the lightweight design of the product. In addition, in the present disclosure, the first inorganic encapsulation layer 109 is reused as the transparent layer 106, which can avoid the additional transparent layer 106, which is beneficial to the lightweight design of the product.

[0054] It should be noted that since the pixel defining layer 108 is used to separate the light-emitting devices 102 and prevent light emitted by light-emitting devices 102 of different colors from crosstalk, when the light-guiding structure 105 and the pixel defining layer 108 are provided in the same layer and with the same material, in order to effectively separate the different light-emitting devices 102, the light-guiding structure 105 provided adjacent to the light-emitting device 102 must be integrally provided with the pixel defining layer 108 of the adjacent light-emitting device 102 and surround the light-emitting material layer of the light-emitting device 102. The light-guiding structure 105 not adjacent to the light-emitting device 102 only needs to control the reflection of large-angle light. Therefore, the light-guiding structure 105 not adjacent to the light-emitting device 102 can be independently provided in the gap between two adjacent light-emitting devices 102, or in the row gap between two adjacent rows of light-emitting devices 102, or in the column gap between two adjacent columns of light-emitting devices 102, or can be integrally provided with the light-guiding structure 105 of the adjacent light-emitting device 102 (i.e., each light-guiding structure 105 forms a cross-shaped grid).

[0055] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 4 As shown, it can also include an encapsulation layer (including a first inorganic encapsulation layer 109, an organic encapsulation layer 110, and a second inorganic encapsulation layer 111) and an insulating layer 112 located on the side of the layer where the light-emitting device 102 is located away from the base substrate 101. The layer where the light-guiding structure 105 is located can be located between the encapsulation layer (specifically the second inorganic encapsulation layer 111) and the insulating layer 112. The insulating layer 112 is reused as the transparent layer 106. In this case, only the film layer of the light-guiding structure 105 needs to be added, and there is no need to additionally set up the transparent layer 106, which is conducive to achieving a lightweight design.

[0056] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figures 1 to 6 As shown, the cross section of the light guide structure 105 in the direction perpendicular to the substrate 101 is a regular trapezoid, or as shown in FIG. Figures 7 to 10 As shown, the cross section of the light guide structure 105 in a direction perpendicular to the base substrate 101 is an inverted trapezoid.

[0057] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 11 As shown, the light-guiding structure 105 can be a convex lens structure 107 that protrudes in a direction away from the base substrate 101. In other words, in the present disclosure, not only can the above-mentioned regular trapezoid or inverted trapezoid be combined with the convex lens structure 107 to achieve the convergence of large-angle reflected light, but the convex lens structure 107 can also be used alone to achieve the convergence of large-angle reflected light.

[0058] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 1 、 Figure 4 Figure 7 、 Figure 9 and Figure 11 As shown, it may also include an interlayer dielectric layer 113, a first gate insulating layer 114, and a second gate insulating layer 115, which are sequentially arranged on the side of the layer where the light-emitting device 102 is located facing the base substrate 101. The convex lens structure 107 is arranged in the same layer and the same material as at least one of the interlayer dielectric layer 113, the first gate insulating layer 114, and the second gate insulating layer 115. In this way, the additional mask process of the convex lens structure 107 can be avoided, and the film layer of the convex lens structure 107 is saved, which is conducive to achieving a lightweight design. The present disclosure is explained by taking the convex lens structure 107 and the interlayer dielectric layer 113 as an example. Optionally, the thickness of the interlayer dielectric layer 113 in the direction perpendicular to the base substrate 101 is 1μm to 1.5μm.

[0059] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, the slope angle of the convex lens structure 107 can be greater than or equal to 45° and less than 90°. The larger the slope angle of the convex lens structure 107, the greater the offset of the light after refraction, and the closer it is to the vertical direction of the base substrate 101, which helps to ensure that more light enters the photosensitive device 103.

[0060] It should be understood that, to simplify the light propagation path and facilitate determination of the relative positions of the convex lens structure 107 and the light-guiding structure 105, the present disclosure sets the refractive index of the film layer between the layer where the convex lens structure 107 resides and the layer where the light-guiding structure 105 resides to be equal to the refractive index of the light-guiding structure 105. Therefore, when the light-guiding structure 105 and the pixel-defining layer 108 are arranged on the same layer and made of the same material, and when the convex lens structure 107 and the interlayer dielectric layer 113 are arranged on the same layer and made of the same material, the refractive index of the first planar layer 116 between the layer where the convex lens structure 107 resides and the layer where the light-guiding structure 105 resides is equal to the refractive index of the light-guiding structure 105. When the light-guiding structure 105 is located between the second inorganic encapsulation layer 111 and the insulating layer 112, and the convex lens structure 107 and the interlayer dielectric layer 113 are in the same layer and are made of the same material, the refractive index of the second inorganic encapsulation layer 111 between the layer where the convex lens structure 107 is located and the layer where the light-guiding structure 105 is located, the refractive index of the organic encapsulation layer 110, the refractive index of the first inorganic encapsulation layer 109, the refractive index of the pixel defining layer 108, and the refractive index of the first flat layer 116 are all the same as the refractive index of the light-guiding structure 105.

[0061] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 1 、 Figures 4 to 11 As shown, the plurality of photosensitive devices 103 may be located on a side of the substrate 101 away from the layer where the plurality of light emitting devices 102 are located, that is, the plurality of photosensitive devices 103 may be placed outside the panel including the plurality of light emitting devices 102. In some embodiments, as Figure 3 As shown, the plurality of photosensitive devices 103 may also be disposed between the first planar layer 116 and the base substrate 101 , that is, the plurality of photosensitive devices 103 may be built into a panel including the plurality of light-emitting devices 102 .

[0062] In some embodiments, in the above-mentioned display substrate provided in the embodiments of the present disclosure, as Figure 1 、 Figures 3 to 11 As shown, the pixel driving circuit 117 (including the driving transistor T d , storage capacitor C st The display substrate further includes a switching transistor T electrically connected to the photosensitive device 103, a buffer layer 118, a second planar layer 119, a third planar layer 120, a first protective cover plate 121, a second protective cover plate 122, and a flexible circuit board 123 electrically connected to the photosensitive device 103. Other essential components of the display substrate are readily understood by those skilled in the art and are not described in detail herein and should not be construed as limiting the present disclosure.

[0063] Based on the same inventive concept, the present disclosure further provides a display device comprising the display substrate described above in the embodiments of the present disclosure. Because the principles underlying the display device's solution are similar to those of the display substrate described above, the implementation of the display device can refer to the embodiments of the display substrate described above, and any repetitions will not be repeated.

[0064] In some embodiments, the above-mentioned display device provided by the embodiments of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, a smart watch, a fitness wristband, a personal digital assistant, etc. The display device includes but is not limited to components such as a radio frequency unit, a network module, an audio output & input unit, a sensor, a display unit, a user input unit, an interface unit, and a control chip. Optionally, the control chip is a central processing unit, a digital signal processor, a system-on-chip (SoC), etc. For example, the control chip may also include a memory, a power module, etc., and realize power supply and signal input and output functions through additionally provided wires, signal lines, etc. For example, the control chip may also include hardware circuits and computer executable codes, etc. The hardware circuit may include conventional very large scale integration (VLSI) circuits or gate arrays and existing semiconductors or other discrete components such as logic chips and transistors; the hardware circuit may also include field programmable gate arrays, programmable array logic, programmable logic devices, etc. In addition, those skilled in the art will understand that the above structure does not constitute a limitation on the above display device provided in the embodiment of the present disclosure. In other words, the above display device provided in the embodiment of the present disclosure may include more or fewer of the above components, or a combination of certain components, or different component arrangements.

[0065] Although the present disclosure has described preferred embodiments, it should be understood that those skilled in the art may make various changes and modifications to the embodiments without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if such modifications and variations of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such modifications and variations.

Claims

1. A display substrate, characterized in that: include: substrate; A plurality of light-emitting devices are located on the substrate; a plurality of photosensitive devices, wherein an orthographic projection of each photosensitive device on the substrate is located within at least a portion of a gap between each light-emitting device and an orthographic projection of each photosensitive device on the substrate; a black matrix comprising a plurality of first openings and a plurality of second openings, wherein the orthographic projections of the plurality of first openings on the base substrate overlap with the orthographic projections of the plurality of light-emitting devices on the base substrate, and the orthographic projections of the plurality of second openings on the base substrate overlap with the orthographic projections of the plurality of photosensitive devices on the base substrate; a light guide structure, wherein an orthographic projection of the light guide structure on the substrate overlaps with an orthographic projection of the plurality of photosensitive devices on the substrate, and a sidewall of the light guide structure has a preset slope angle with the substrate; The transparent layer at least covers the light-guiding structure, and the refractive index of the transparent layer is greater than the refractive index of the light-guiding structure.

2. The display substrate according to claim 1, wherein The preset slope angle of the light guide structure is greater than or equal to arcsin(n2 / n1), wherein n1 is the refractive index of the transparent layer, n2 is the refractive index of the light guide structure, and n1 is greater than n2.

3. The display substrate according to claim 2, wherein: It also includes a convex lens structure located between the layer where the light guide structure is located and the layer where the photosensitive devices are located, wherein the orthographic projection of the convex lens structure on the base substrate overlaps with the orthographic projection of the plurality of photosensitive devices on the base substrate; The refractive index of the convex lens structure is greater than the refractive index of the light guide structure, and the refractive index of the film layer between the layer where the convex lens structure is located and the layer where the light guide structure is located is equal to the refractive index of the light guide structure.

4. The display substrate according to any one of claims 1 to 3, wherein: The light-emitting device includes a first electrode, and the display substrate further includes a pixel defining layer located on a side of the layer where the first electrode is located away from the base substrate, and an inorganic encapsulation layer provided in contact with the light-emitting device on a side of the layer where the light-emitting device is located away from the base substrate; The light guide structure and the pixel defining layer are provided in the same layer and with the same material, and the inorganic encapsulation layer is reused as the transparent layer.

5. The display substrate according to any one of claims 1 to 3, wherein: It also includes an encapsulation layer and an insulating layer located on the side of the layer where the light-emitting device is located away from the base substrate. The layer where the light-guiding structure is located is located between the encapsulation layer and the insulating layer, and the insulating layer is reused as the transparent layer.

6. The display substrate according to any one of claims 1 to 3, wherein: The cross section of the light guide structure in a direction perpendicular to the base substrate is a regular trapezoid or an inverted trapezoid.

7. The display substrate according to claim 1, wherein: The light guide structure is a convex lens structure that bulges in a direction away from the base substrate.

8. The display substrate according to claim 3 or 7, wherein: It also includes an interlayer dielectric layer, a first gate insulating layer, and a second gate insulating layer arranged in sequence on the side of the base substrate where the light-emitting device is located, and the convex lens structure is arranged in the same layer and with the same material as at least one of the interlayer dielectric layer, the first gate insulating layer, and the second gate insulating layer.

9. The display substrate according to claim 3 or 7, wherein: The slope angle of the convex lens structure is greater than or equal to 45° and less than 90°.

10. The display substrate according to any one of claims 1 to 3 and 7, wherein: The multiple photosensitive devices are located on a side of the base substrate away from the layer where the multiple light-emitting devices are located.

11. The display substrate according to any one of claims 1 to 3, wherein: It also includes a flat layer located between the layer where the multiple light-emitting devices are located and the base substrate, and the multiple photosensitive devices are located between the flat layer and the base substrate.

12. A display device, characterized in that: The display substrate comprises the display substrate according to any one of claims 1 to 11.

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