Display substrate and display device

Abstract

A display substrate and a display device, comprising a base substrate, a driving circuit, a light-emitting element, and a metal light-shielding layer. The driving circuit is located on the base substrate, the metal light-shielding layer is located on a side of the driving circuit away from the base substrate, and the light-emitting element is located on a side of the metal light-shielding layer away from the driving circuit. The metal light-shielding layer comprises a first metal light-shielding portion and a second metal light-shielding portion at least partially surrounding the first metal light-shielding portion, the first metal light-shielding portion and the second metal light-shielding portion being insulated from each other and having a light-transmitting region. The driving circuit comprises a first electrode electrically connected to the first metal light-shielding portion via a first via hole. The light-emitting element comprises a second electrode electrically connected to the first metal light-shielding portion via a second via hole. The orthographic projection of the second electrode on the base substrate and the orthographic projection of the light-transmitting region on the base substrate at least partially overlap.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a display substrate and a display device. Background Art

[0002] With the increasing popularity of mobile devices, more and more users are using them for authentication, electronic payments, and other operations. Due to the uniqueness of fingerprint patterns, fingerprint recognition technology combined with optical imaging is gradually being adopted by mobile electronic devices for authentication, electronic payments, and other purposes. Furthermore, with the advent of the full-screen mobile phone era, under-screen fingerprint recognition technology is becoming increasingly widely used in mobile phone fingerprint recognition. Summary of the Invention

[0003] At least one embodiment of the present disclosure provides a display substrate, which includes: a base substrate, a driving circuit, a light-emitting element and a metal shading layer; wherein the driving circuit is located on the base substrate, the metal shading layer is located on a side of the driving circuit away from the base substrate, and the light-emitting element is located on a side of the metal shading layer away from the driving circuit; the metal shading layer includes a first metal shading portion and a second metal shading portion that at least partially surrounds the first metal shading portion, the first metal shading portion and the second metal shading portion are insulated from each other and have a light-transmitting area; the driving circuit includes a first electrode, which is electrically connected to the first metal shading portion through a first via hole; the light-emitting element includes a second electrode, which is electrically connected to the first metal shading portion through a second via hole; the orthographic projection of the second electrode on the base substrate and the orthographic projection of the light-transmitting area on the base substrate at least partially overlap.

[0004] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the light-transmitting area on the base substrate is located within the orthographic projection of the second electrode on the base substrate.

[0005] For example, in the display substrate provided in at least one embodiment of the present disclosure, the area of ​​the orthographic projection of the second electrode on the base substrate is larger than the area of ​​the orthographic projection of the light-transmitting region on the base substrate.

[0006] For example, in the display substrate provided in at least one embodiment of the present disclosure, the driving circuit includes a first light-transmitting opening, and the first light-transmitting opening is configured to allow light incident from a display side of the display substrate to pass therethrough.

[0007] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the first light-transmitting opening on the base substrate partially overlaps with the orthographic projection of the light-transmitting area on the base substrate.

[0008] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the second electrode on the base substrate at least partially covers the other part of the orthographic projection of the first light-transmitting opening on the base substrate except the part overlapping with the orthographic projection of the light-transmitting area on the base substrate.

[0009] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the first light-transmitting opening on the base substrate is located within the orthographic projection of the light-transmitting area on the base substrate.

[0010] For example, in the display substrate provided in at least one embodiment of the present disclosure, the second electrode includes a second light-transmitting opening, which is configured to allow light incident from the display side of the display substrate to pass through and further pass through the light-transmitting area and the first light-transmitting opening.

[0011] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the second light-transmitting opening on the base substrate is located within the orthographic projection of the first light-transmitting opening on the base substrate, and the area of ​​the orthographic projection of the second light-transmitting opening on the base substrate is equal to the area of ​​the orthographic projection of the first light-transmitting opening on the base substrate.

[0012] For example, in the display substrate provided by at least one embodiment of the present disclosure, the driving circuit further includes a first transistor, and the first electrode is configured as a source or a drain of the first transistor.

[0013] For example, in the display substrate provided in at least one embodiment of the present disclosure, the driving circuit further includes a first transistor, which is located on a side of the first electrode away from the metal light-shielding layer, and the source or drain of the first transistor is electrically connected to the first electrode.

[0014] For example, in the display substrate provided in at least one embodiment of the present disclosure, the first via hole and the second via hole are at least partially overlapped in a direction perpendicular to the base substrate, or the first via hole and the second via hole are staggered in a direction perpendicular to the base substrate.

[0015] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the first via hole on the base substrate and the orthographic projection of the second via hole on the base substrate at least partially overlap, or the orthographic projection of the first via hole on the base substrate and the orthographic projection of the second via hole on the base substrate do not overlap with each other.

[0016] For example, the display substrate provided by at least one embodiment of the present disclosure also includes a first insulating layer and a second insulating layer, wherein the first insulating layer is located between the first electrode and the metal light-shielding layer, the second insulating layer is located between the second electrode and the metal light-shielding layer, the first via is provided in the first insulating layer, and the second via is provided in the second insulating layer.

[0017] For example, in the display substrate provided in at least one embodiment of the present disclosure, the second electrode is an opaque electrode.

[0018] For example, in the display substrate provided by at least one embodiment of the present disclosure, the first metal light-shielding portion and the second metal light-shielding portion are configured to receive different electrical signals, respectively.

[0019] For example, in the display substrate provided in at least one embodiment of the present disclosure, the light-emitting element further includes a pixel defining layer, a light-emitting layer and a third electrode, the pixel defining layer is located on a side of the second electrode away from the metal light-shielding layer, the light-emitting layer is located on a side of the pixel defining layer away from the second electrode, and the third electrode is located on a side of the light-emitting layer away from the pixel defining layer.

[0020] For example, the display substrate provided by at least one embodiment of the present disclosure also includes a photosensitive element, wherein the photosensitive element is located on a side of the driving circuit away from the metal light-shielding layer, and is configured to receive light incident from the display side of the display substrate and passing through the first light-transmitting opening.

[0021] For example, in the display substrate provided by at least one embodiment of the present disclosure, the orthographic projection of the first light-transmitting opening on the base substrate is located within the orthographic projection of the photosensitive element on the base substrate.

[0022] At least one embodiment of the present disclosure further provides a display device, comprising the display substrate described in any embodiment of the present disclosure.

[0023] At least one embodiment of the present disclosure also provides a method for manufacturing a display substrate, comprising: providing a base substrate; forming a first electrode of a driving circuit on the base substrate; forming a metal shading layer on the first electrode; and forming a second electrode of a light-emitting element on the metal shading layer; wherein the metal shading layer comprises a first metal shading portion and a second metal shading portion that at least partially surrounds the first metal shading portion, the first metal shading portion and the second metal shading portion are insulated from each other and have a light-transmitting area; the first electrode is electrically connected to the first metal shading portion through a first via hole, and the second electrode is electrically connected to the first metal shading portion through a second via hole; the orthographic projection of the second electrode on the base substrate and the orthographic projection of the light-transmitting area on the base substrate at least partially overlap.

[0024] For example, the manufacturing method of the display substrate provided by at least one embodiment of the present disclosure also includes: forming a first insulating layer between the first electrode and the metal shading layer, and forming the first via hole in the first insulating layer; and forming a second insulating layer between the second electrode and the metal shading layer, and forming the second via hole in the second insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0026] Figure 1 A schematic plan view of a display substrate provided in some embodiments of the present disclosure;

[0027] Figure 2 A schematic diagram of a pixel circuit structure of a display substrate provided in some embodiments of the present disclosure;

[0028] Figure 3 A partial top view schematic diagram of a display substrate provided in some embodiments of the present disclosure;

[0029] Figures 4A-4B A partial top view schematic diagram of another display substrate provided in some embodiments of the present disclosure;

[0030] Figure 5A A schematic diagram of a partial cross-sectional structure of a display substrate provided in some embodiments of the present disclosure;

[0031] Figure 5B A schematic diagram of a partial cross-sectional structure of another display substrate provided in some embodiments of the present disclosure;

[0032] Figure 6 A partial top view of another display substrate provided for some embodiments of the present disclosure; and

[0033] Figure 7 A partial top view of another display substrate provided for some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0035] Unless otherwise defined, the technical or scientific terms used herein should have the usual meaning understood by a person of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantitative limitation, but rather indicate the presence of at least one. 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.

[0036] Currently, one way to achieve under-screen fingerprint recognition is to integrate a photosensitive element (such as a photosensitive image sensor) with a fingerprint recognition function into a display device, and use the pinhole imaging principle in combination with the photosensitive element to collect fingerprint images. For example, small holes are opened at a certain interval in the display area of ​​the display device as imaging holes, so that the light reflected by the fingerprint can be irradiated onto the photosensitive element through the imaging holes for imaging, and then the display device analyzes and processes the acquired fingerprint image to realize the fingerprint recognition function. However, in the process of the photosensitive element acquiring the fingerprint image, the light reflected by the fingerprint or the external incident light may form stray light in a large viewing angle direction, and this stray light may pass through other places other than the imaging holes and irradiate the photosensitive element, resulting in light leakage, which in turn interferes with the imaging result on the photosensitive element, affects the clarity of the collected fingerprint image, and makes it impossible for the display device to accurately analyze and recognize the fingerprint based on the acquired fingerprint image. Therefore, it is necessary to reduce or prevent the light leakage phenomenon in other places in the display device other than the imaging holes.

[0037] At least one embodiment of the present disclosure provides a display substrate, which includes a base substrate, a driving circuit, a light-emitting element and a metal light-shielding layer. The driving circuit is located on the base substrate, the metal light-shielding layer is located on a side of the driving circuit away from the base substrate, and the light-emitting element is located on a side of the metal light-shielding layer away from the driving circuit. The metal light-shielding layer includes a first metal light-shielding portion and a second metal light-shielding portion that at least partially surrounds the first metal light-shielding portion, the first metal light-shielding portion and the second metal light-shielding portion are insulated from each other and have a light-transmitting area. The driving circuit includes a first electrode, and the first electrode is electrically connected to the first metal light-shielding portion through a first via. The light-emitting element includes a second electrode, and the second electrode is electrically connected to the first metal light-shielding portion through a second via. The orthographic projection of the second electrode on the base substrate and the orthographic projection of the light-transmitting area on the base substrate at least partially overlap.

[0038] The display substrate provided by the embodiment of the present disclosure can reduce or filter out stray light leaking from the display side of the display substrate by making the second electrode and the light-transmitting area in the metal light-shielding layer overlap with each other in a direction perpendicular to the base substrate, thereby reducing or avoiding the light leakage phenomenon, thereby reducing or avoiding the adverse effects of stray light on the photosensitivity imaging process of the display substrate, and making the image obtained by the display substrate clearer and more accurate.

[0039] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the same reference numerals in different drawings will be used to refer to the same elements described.

[0040] Figure 1 A schematic plan view of a display substrate 10 provided in some embodiments of the present disclosure.

[0041] For example, Figure 1 As shown, the display substrate 10 includes a display area 101, which includes a fingerprint recognition area 102. The fingerprint recognition area 102 can be a partial area or the entire area of ​​the display area 101, thereby enabling the display substrate 10 to implement a partial under-screen fingerprint recognition function or a full-screen fingerprint recognition function. For example, openings (e.g., small holes) can be provided at a certain interval in the fingerprint recognition area 102 to serve as imaging holes, so that light reflected from the finger's fingerprint passes through the imaging holes and is irradiated onto, for example, a photosensitive element of the display substrate 10 for imaging, thereby enabling the display substrate 10 to obtain the user's fingerprint image and analyze and process the obtained fingerprint image to implement the fingerprint recognition function.

[0042] For example, in some embodiments of the present disclosure, the display substrate 10 can be an organic light-emitting diode (OLED) display substrate, a quantum dot light-emitting diode (QLED) display substrate, an electronic paper display substrate, etc., and the embodiments of the present disclosure are not limited to this.

[0043] Because the OLED display substrate has self-luminous properties, the brightness of the pixel units used for display can be controlled or adjusted as needed. This can facilitate, for example, the fingerprint image acquisition process and can also help improve the integration of display devices including the OLED display substrate. The embodiments of the present disclosure are described using an OLED display substrate as an example, but this does not constitute a limitation of the embodiments of the present disclosure.

[0044] For example, when the display substrate 10 is used for fingerprint recognition, light emitted by the organic light-emitting diode is reflected by the user's skin (e.g., a finger or palm) on the display side of the display substrate 10. Using the principle of pinhole imaging, the light is illuminated through openings provided at a certain interval onto a photosensitive element located, for example, on the back side of the display substrate 10 opposite the display side, thereby forming an image. This allows the photosensitive element to capture an image of the user's skin texture (e.g., a fingerprint pattern). The display substrate 10 analyzes and recognizes the user's skin texture image captured by the photosensitive element and then performs corresponding operations. For example, after performing fingerprint recognition on the captured fingerprint image, the display substrate 10 can perform corresponding operations according to a preset control process.

[0045] For example, the photosensitive element can also be built into the display substrate 10. For example, the photosensitive element can be set between the base substrate of the display substrate 10 and the driving circuit, so that the photosensitive element can be closer to the display side of the display substrate 10, shortening the path of the reflected light to the photosensitive element, so that the skin texture image collected by the photosensitive element is more accurate and clear.

[0046] For example, the photosensitive element may be a photosensitive image sensor that forms a fingerprint or palm print image or other skin texture image of the user by acquiring light reflected from the user's skin, thereby enabling the display device including the display substrate 10 to implement functions such as fingerprint recognition and palm print recognition. For example, in some embodiments of the present disclosure, the photosensitive element may also be used to capture images of non-biological textures other than fingerprints and palm prints, such as finger prints, but the embodiments of the present disclosure are not limited thereto.

[0047] For example, the photosensitive element can be coupled (or signal-connected) to a processor (e.g., an integrated circuit chip) via a lead, and the collected skin texture image can be transmitted to the processor of the display device in the form of a data signal. For example, the photosensitive element can also be a fingerprint sensor of various appropriate types, such as a charge coupled device (CCD) or complementary metal oxide semiconductor (CMOS) image sensor, and the embodiments of the present disclosure are not limited to this. For example, as needed, the photosensitive element can sense only a certain wavelength of light (e.g., red light or green light), or it can sense all visible light.

[0048] The embodiments of the present disclosure take the acquisition of fingerprint images by a photosensitive element as an example to illustrate the structure and function of the display substrate provided in some embodiments of the present disclosure, but this does not constitute a limitation to the embodiments of the present disclosure.

[0049] For example, the display area 101 of the display substrate 10 can be divided into a plurality of pixel units arranged in an array, and each pixel unit is provided with a light-emitting element (such as an OLED) and a driving circuit electrically connected to the light-emitting element. For example, each pixel unit can drive the OLED to emit light through the driving circuit, and control the luminous brightness of the OLED as needed. For example, the driving circuit can be a basic 2T1C circuit, that is, using two thin-film transistors and a storage capacitor to achieve the basic function of driving the OLED to emit light, or it can also be a circuit of other structures, such as a 4T1C, 4T2C, 6T1C or 8T2C circuit. For example, the anode of the OLED can be electrically connected to the source or drain of, for example, a driving transistor or a light-emitting control transistor in the driving circuit to obtain an anode signal, and then work together with the cathode of the OLED to make the light-emitting layer of the OLED emit light.

[0050] Below, the display substrate provided by some embodiments of the present disclosure is described by taking the circuit structure of the driving circuit including 7T1C as an example. It should be noted that the embodiments of the present disclosure include but are not limited to this.

[0051] Figure 2 This is a schematic diagram of a pixel circuit structure of a display substrate provided in some embodiments of the present disclosure. For example, Figure 2 for Figure 1 FIG. 1 is a schematic diagram of a driving circuit structure of each pixel unit in the display area 101 of the display substrate 10 .

[0052] For example, Figure 2 As shown, each pixel unit includes a driving circuit 310, a light emitting element 320, a gate line 113, a data line 213 and a voltage signal line.

[0053] For example, the light emitting element 320 is an organic light emitting diode (OLED), and the light emitting element 320 emits red light, green light, blue light, white light, etc. when driven by its corresponding driving circuit 310 .

[0054] For example, the voltage signal line may be one or may include multiple lines.

[0055] For example, Figure 2 As shown, the voltage signal lines include at least one of a first power line 214, a second power line 14, a light emission control signal line 110, a first initialization signal line 212, a second initialization signal line 211, a first reset control signal line 111, and a second reset control signal line 112. The gate line 113 is configured to provide a scan signal SCAN to the driving circuit 310. The data line 213 is configured to provide a data signal DATA to the driving circuit 310.

[0056] For example, a pixel may include multiple pixel units. A pixel may include multiple pixel units that emit light of different colors. For example, a pixel may include a pixel unit that emits red light, a pixel unit that emits green light, and a pixel unit that emits blue light, but the present invention is not limited thereto. The number of pixel units included in a pixel and the light emission characteristics of each pixel unit can be determined according to actual needs.

[0057] For example, the first power line 214 is configured to provide a constant first voltage signal ELVDD to the driver circuit 310, and the second power line 14 is configured to provide a constant second voltage signal ELVSS to the driver circuit 310, wherein the first voltage signal ELVDD is greater than the second voltage signal ELVSS. The emission control signal line 110 is configured to provide the emission control signal EM to the driver circuit 310. The first initialization signal line 212 and the second initialization signal line 211 are configured to provide the initialization signal Vint to the driver circuit 310, the first reset control signal line 111 is configured to provide the reset control signal RESET to the driver circuit 310, and the second reset control signal line 112 is configured to provide the scan signal SCAN to the driver circuit 310. The initialization signal Vint is a constant voltage signal whose magnitude can be, for example, between the first voltage signal ELVDD and the second voltage signal ELVSS, but is not limited thereto. For example, the initialization signal Vint can also be less than or equal to the second voltage signal ELVSS.

[0058] For example, Figure 2 As shown, the driving circuit 310 includes a driving transistor T1, a data writing transistor T2, a threshold compensation transistor T3, a first light emission control transistor T4, a second light emission control transistor T5, a first reset transistor T6, a second reset transistor T7, and a storage capacitor C1. The driving transistor T1 is electrically connected to the light emitting element 320 and outputs a driving current to drive the light emitting element 320 to emit light under the control of signals such as a scan signal SCAN provided by the gate line 113, a data signal DATA provided by the data line 213, a first voltage signal ELVDD provided by the first power line 214, and a second voltage signal ELVSS provided by the second power line 14.

[0059] For example, in a pixel unit of an OLED display substrate, a driving transistor is electrically connected to an organic light-emitting element and outputs a driving current to the organic light-emitting element under the control of signals such as data signals and scan signals, thereby driving the organic light-emitting element to emit light.

[0060] Figure 3 This is a partial top view of a display substrate provided in some embodiments of the present disclosure. For example, Figure 3 for Figure 1 FIG. 1 is a partial top view of a display substrate 10 .

[0061] For example, combined with Figure 1 、 Figure 2 and Figure 3 As shown, the display substrate 10 includes a driving circuit 310 , and the driving circuit 310 includes a first light-transmitting opening 410 . The first light-transmitting opening 410 is located between the first light-emitting control transistor T4 and the second light-emitting control transistor T5 .

[0062] The display substrate 10 provided in the embodiment of the present disclosure obtains a more reasonable placement scheme for the first light-transmitting opening 410 (i.e., the imaging aperture) by overall optimization and adjustment of the pattern within the pixel unit while ensuring the process margin and the functionality of the driving circuit 310.

[0063] For example, Figure 2 and Figure 3 As shown, the gate T40 of the first light emission control transistor T4 and the gate T50 of the second light emission control transistor T5 are both connected to the light emission control signal line 110. Figure 3 As shown, a portion of the light emission control signal line 110 serves as the gate T40 of the first light emission control transistor T4. Figure 3 As shown, a portion of the light emission control signal line 110 serves as the gate T50 of the second light emission control transistor T5. Figure 3 As shown, the light emission control signal line 110 extends along the first direction X. Since the first light-transmitting opening 410 is located between the first light emission control transistor T4 and the second light emission control transistor T5 , the position of the first light-transmitting opening 410 in the first direction X is defined.

[0064] For example, Figure 3 As shown, the first emission control transistor T4, the first light-transmitting opening 410, and the second emission control transistor T5 are arranged along the first direction X. For example, the first electrode T41 of the first emission control transistor T4 and the second electrode T52 of the second emission control transistor T5 are located on the same side of the emission control signal line 110, and the line connecting the center of the first electrode T41 of the first emission control transistor T4 and the center of the second electrode T52 of the second emission control transistor T5 passes through the first light-transmitting opening 410. It should be noted that in the embodiments of the present disclosure, the center of a component may refer to the center of its geometric shape, or the center of gravity of its geometric shape, but is not limited thereto. The line connecting the center of the first electrode T41 of the first emission control transistor T4 and the center of the second electrode T52 of the second emission control transistor T5 is a virtual line.

[0065] For example, Figure 3As shown, the first light-transmitting opening 410 is located on the first side of the light-emitting control signal line 110 . The first electrode T41 of the first light-emitting control transistor T4 and the second electrode T52 of the second light-emitting control transistor T5 are also located on the first side of the light-emitting control signal line 110 .

[0066] For example, Figure 2 and Figure 3 As shown, the driving circuit 310 further includes a driving transistor T1 located on the second side of the light emitting control signal line 110, and the first side and the second side are opposite sides of the light emitting control signal line 110. Figure 3 As shown, the first side is the upper side of the light emitting control signal line 110 , and the second side is the lower side of the light emitting control signal line 110 .

[0067] For example, the first electrode T41 and the second electrode T42 of the first light-emitting control transistor T4 are electrically connected to the first power line 214 and the first electrode T11 of the driving transistor T1, respectively. The first electrode T51 and the second electrode T52 of the second light-emitting control transistor T5 are electrically connected to the second electrode T12 of the driving transistor T1, the second electrode 322 ( Figure 3 Not shown, please refer to Figure 2 or Figure 4B For example, the second electrode 322 may be an anode of the light emitting element 320 .

[0068] For example, Figure 3 As shown, the first power line 214 extends along a second direction Y, and the second direction Y intersects the first direction X. For example, the second direction Y is perpendicular to the first direction X, but is not limited thereto.

[0069] For example, Figure 3 As shown, the gate T60 of the first reset transistor T6 is electrically connected to the first reset control signal line 111, the first electrode T61 of the first reset transistor T6 is electrically connected to the second initialization signal line 211 through the first connection electrode 31a, and the second electrode T62 of the first reset transistor T6 is electrically connected to the gate T10 of the driving transistor T1 through the second connection electrode 31b. The gate T70 of the second reset transistor T7 is electrically connected to the second reset control signal line 112, the first electrode T71 of the second reset transistor T7 is electrically connected to the first initialization signal line 212 through the third connection electrode 31c, and the second electrode T72 of the second reset transistor T7 is electrically connected to the second electrode 322 ( Figure 3 Not shown, see Figure 2 or Figure 4B ) electrical connection.

[0070] For example, Figure 2 and Figure 3As shown, the gate T40 of the first light-emitting control transistor T4 is electrically connected to the light-emitting control signal line 110, and the first electrode T41 and the second electrode T42 of the first light-emitting control transistor T4 are electrically connected to the first power line 214 and the first electrode T11 of the driving transistor T1, respectively. The gate T50 of the second light-emitting control transistor T5 is electrically connected to the light-emitting control signal line 110, and the first electrode T51 and the second electrode T52 of the second light-emitting control transistor T5 are electrically connected to the second electrode T12 of the driving transistor T1 and the second electrode 322 of the light-emitting element 320, respectively (see FIG. Figure 2 ) is electrically connected. The third electrode 321 of the light emitting element 320 (which may be the common electrode of the OLED, such as the cathode) is electrically connected to the second power line 14 (see Figure 2 ).

[0071] It should be noted that the transistors used in the embodiments of the present disclosure may all be thin film transistors or field effect transistors or other switching devices with the same characteristics. The source and drain of the transistor used here may be symmetrical in structure, so the source and drain may be structurally indistinguishable. In the embodiments of the present disclosure, in order to distinguish the two poles of the transistor other than the gate, one of the poles is directly described as the first pole and the other pole as the second pole, so the first pole and the second pole of all or part of the transistors in the embodiments of the present disclosure can be interchangeable as needed. For example, the first pole of the transistor described in the embodiments of the present disclosure may be a source pole, and the second pole may be a drain pole; or, the first pole of the transistor may be a drain pole, and the second pole may be a source pole.

[0072] In addition, transistors can be divided into N-type and P-type transistors according to their characteristics. The embodiments of the present disclosure are described by taking the case where all transistors are P-type transistors as an example. Based on the description and teaching of the implementation method in the present disclosure, ordinary technicians in this field can easily think of using N-type transistors for at least some of the transistors in the pixel circuit structure of the embodiment of the present disclosure, that is, using N-type transistors or a combination of N-type transistors and P-type transistors, without having to make creative work. Therefore, these implementation methods are also within the scope of protection of the present disclosure.

[0073] For example, Figure 3 As shown, the second initialization signal line 211 extends along the first direction X, the first initialization signal line 212 extends along the first direction X, the first reset control signal line 111 extends along the first direction X, and the second reset control signal line 112 extends along the first direction X.

[0074] For example, Figure 3 As shown, the first light-transmitting opening 410 is also located between the driving transistor T1 and the second reset transistor T7. Thus, in the second direction Y, the position of the first light-transmitting opening 410 is defined.

[0075] For example, the driving transistor T1 and the second reset transistor T7 are respectively disposed on opposite sides of the first light-transmitting opening 410 in the second direction Y. For example, the driving transistor T1 and the second reset transistor T7 are respectively disposed on opposite sides of the first light-transmitting opening 410 in the second direction Y.

[0076] For example, the first light-transmitting opening 410 is also located between the first initialization signal line 212 and the light-emitting control signal line 110 , so that the position of the first light-transmitting opening 410 in the second direction Y is defined.

[0077] For example, Figure 3 As shown, the second reset control signal line 112 , the first initialization signal line 212 , the light emitting control signal line 110 , the first reset control signal line 111 and the second initialization signal line 211 are sequentially arranged along the second direction Y.

[0078] For example, Figure 2 and Figure 3 As shown, the first electrode C11 of the storage capacitor C1 is electrically connected to the first power line 214, and the second electrode C12 of the storage capacitor C1 is electrically connected to the second electrode T32 of the threshold compensation transistor T3 via the second connection electrode 31b. The gate T20 of the data write transistor T2 is electrically connected to the gate line 113, and the first electrode T21 and the second electrode T22 of the data write transistor T2 are electrically connected to the data line 213 and the first electrode T11 of the drive transistor T1, respectively. The gate T30 of the threshold compensation transistor T3 is electrically connected to the gate line 113, the first electrode T31 of the threshold compensation transistor T3 is electrically connected to the second electrode T12 of the drive transistor T1, and the second electrode T32 of the threshold compensation transistor T3 is electrically connected to the gate T10 of the drive transistor T1 via the second connection electrode 31b.

[0079] For example, Figure 3 As shown, in order to facilitate the formation of the first light-transmitting opening 410 , the edge of the first power line 214 close to the data line 213 is at the same distance from the data line 213 at each position.

[0080] For example, Figure 3 As shown, the gate line 113 extends along the first direction X, and the gate line 113 is located between the light emitting control signal line 110 and the first reset control signal line 111. Figure 3 As shown, the gate line 113 is located between the storage capacitor C1 and the first reset control signal line 111 .

[0081] For example, Figure 3 As shown, the data line 213 extends along the second direction Y, and the first power line 214 extends along the second direction Y.

[0082] For example, Figure 3As shown, the first power line 214 is electrically connected to the first electrode T41 of the first light emitting control transistor T4 through the via hole VH2. Figure 3 As shown, the second connection electrode 31b is connected to the second electrode T32 of the threshold compensation transistor T3 through the via hole VH21, and the second connection electrode 31b is connected to the gate T10 of the driving transistor T1 through the via hole VH22.

[0083] For example, Figure 3 As shown, the size of the first light-transmitting opening 410 in the first direction X is 5 μm-15 μm, and the size of the first light-transmitting opening 410 in the second direction Y is 5 μm-15 μm. For example, the size of the pixel unit in the first direction X is about 30 μm. For example, the size of the pixel unit in the second direction Y is about 60 μm.

[0084] For example, Figure 3 As shown, the display substrate 10 further includes a fourth connection electrode 31d, which is electrically connected to the second electrode T52 of the second light emitting control transistor T5. The fourth connection electrode 31d can be used to connect to the second electrode 322 ( Figure 3 Not shown, please refer to Figure 2 or Figure 4B ) electrical connection.

[0085] In the embodiments of the present disclosure, Figure 3 As shown, the gate T40 of the first light-emitting control transistor T4 is part of the light-emitting control signal line 110, the gate T50 of the second light-emitting control transistor T5 is part of the light-emitting control signal line 110, the gate T20 of the data writing transistor T2 is part of the gate line 113, the gate T30 of the threshold compensation transistor T3 is part of the gate line 113, the gate T60 of the first reset transistor T6 is part of the first reset control signal line 111, and the gate T70 of the second reset transistor T7 is part of the second reset control signal line 112.

[0086] For example, Figure 3 The octagonal wireframes in the figure represent the positions of the corresponding vias VH40, VH0, VH1, VH2, VH3, VH11, VH12, VH21, VH22, VH31, and VH32, respectively. Figure 3As shown, the data line 213 is electrically connected to the first electrode T21 of the data write transistor T2 through a via VH1. The first power line 214 is electrically connected to the first electrode T41 of the first light-emitting control transistor T4 through a via VH2. The first power line 214 is electrically connected to the first electrode C11 of the storage capacitor C1 through a via VH3. The first power line 214 is electrically connected to the connecting element 215 through a via VH0. The connecting element 215 is connected in parallel with the first power line 214, thereby reducing resistance. One end of the first connection electrode 31a is electrically connected to the second initialization signal line 211 through a via VH11. The other end of the first connection electrode 31a is connected to the first electrode T61 of the first reset transistor T6 through a via VH12, thereby electrically connecting the first electrode T61 of the first reset transistor T6 to the second initialization signal line 211. One end of the second connection electrode 31b is electrically connected to the second electrode T62 of the first reset transistor T6 through a via hole VH21, and the other end of the second connection electrode 31b is electrically connected to the gate electrode T10 of the driving transistor T1 (i.e., the second electrode C12 of the storage capacitor C1) through a via hole VH22, thereby electrically connecting the second electrode T62 of the first reset transistor T6 to the gate electrode T10 of the driving transistor T1 (i.e., the second electrode C12 of the storage capacitor C1). One end of the third connection electrode 31c is electrically connected to the first initialization signal line 212 through a via hole VH31, and the other end of the third connection electrode 31c is electrically connected to the first electrode T71 of the second reset transistor T7 through a via hole VH32, thereby electrically connecting the first electrode T71 of the second reset transistor T7 to the first initialization signal line 212. The fourth connection electrode 31d is electrically connected to the second electrode T52 of the second emission control transistor T5 through a via hole VH40.

[0087] For example, in Figure 3 In the figure, the second reset transistor T7 in the upper left corner, the first reset transistor T6 in the lower right corner, the driving transistor T1, the data writing transistor T2, the threshold compensation transistor T3, the first light emission control transistor T4, and the second light emission control transistor T5 constitute Figure 2 The seven transistors shown are seven transistors constituting a driving circuit within a pixel unit.

[0088] In some embodiments, the imaging apertures used to implement the fingerprint recognition function are periodically distributed within the fingerprint recognition area 102 of the display substrate 10. For example, within the fingerprint recognition area 102 of the display substrate 10, the first light-transmitting openings 410 in the pixel units are configured as imaging apertures at a predetermined interval to implement the fingerprint recognition operation. The first light-transmitting openings 410 in the fingerprint recognition area 102 that do not serve as imaging apertures are shielded by a metal light-shielding layer disposed on the driving circuit 310 and a second electrode of the light-emitting element 320 disposed on the metal light-shielding layer. This reduces or prevents stray light entering from the display side of the display substrate 10 from leaking through the first light-transmitting openings 410 that do not serve as imaging apertures. This further reduces or prevents the adverse effects of stray light on the photosensitivity and imaging process of the display substrate 10, making the images captured by the display substrate 10 clearer and more accurate.

[0089] Figures 4A-4B A partial top view of another display substrate provided in some embodiments of the present disclosure. For example, Figure 4A and Figure 4B To correspond to Figure 1 , which is a partial top view of a pixel unit in which no imaging aperture is provided in the fingerprint recognition area 102 of the display substrate 10 (ie, the first light-transmitting opening 410 does not serve as an imaging aperture).

[0090] It should be noted that Figure 4A The partial top view structure of the display substrate 10 shown in FIG. 1 is similar to that of FIG. 1 except for the addition of a metal light shielding layer. Figure 3 The partial top view structure of the display substrate 10 shown in FIG is substantially the same or similar; Figure 4B The partial top view structure of the display substrate 10 shown in FIG. 1 is similar to that of FIG. 1 except that a metal light shielding layer and a second electrode 322 of the light emitting element 320 are added. Figure 3 The partial top view structure of the display substrate 10 shown in is substantially the same or similar, and will not be described in detail here.

[0091] For example, Figure 4A and Figure 4B As shown, in a pixel unit where no imaging aperture is provided, the first light-transmitting opening 410 is blocked by the overlapping of the metal light-shielding layer located on the side of the base substrate away from the display substrate 10 where the driving circuit 310 is located, and the second electrode 322 of the light-emitting element 320 located on the side of the metal light-shielding layer away from the driving circuit 310, so as to prevent stray light from leaking through the light-transmitting opening 410.

[0092] For example, Figure 4A and Figure 4BAs shown, the first metal light-shielding portion 510 of the metal light-shielding layer can be configured as an octagon. In a direction perpendicular to the base substrate of the display substrate 10, the first metal light-shielding portion 510 partially overlaps with the first light-transmitting opening 410, thereby partially blocking the first light-transmitting opening 410. The second metal light-shielding portion 520 of the metal light-shielding layer surrounds the first metal light-shielding portion 510. The first metal light-shielding portion 510 and the second metal light-shielding portion 520 are insulated from each other and have a light-transmitting region 530. In a direction perpendicular to the base substrate of the display substrate 10, the second metal light-shielding portion 520 partially overlaps with the first light-transmitting opening 410, thereby partially blocking the first light-transmitting opening 410. For example, the outer and inner contours of the light-transmitting region 530 are both octagonal, that is, the light-transmitting region 530 is an octagonal ring.

[0093] For example, Figure 4A and Figure 4B As shown, in the direction perpendicular to the base substrate of the display substrate 10, the second electrode 322 of the light-emitting element 320 partially overlaps with the light-transmitting area 530, and thus can block the portion of the first light-transmitting opening 410 that overlaps with the light-transmitting area 530 in the direction perpendicular to the base substrate of the display substrate 10, that is, block the portion of the first light-transmitting opening 410 that is not blocked by the first metal light-shielding portion 510 and the second metal light-shielding portion 520, thereby avoiding or reducing the stray light incident from the display side of the display substrate 10 from leaking through the light-transmitting area 530. Furthermore, the second electrode 522 of the light-emitting element 520 can block the entire area of ​​the first light-transmitting opening 410 together with the first metal light-shielding portion 510 and the second metal light-shielding portion 520 by blocking the light-transmitting area 530, thereby reducing or preventing stray light entering from the display side of the display substrate 10 from leaking through the light-transmitting area 530 or the first light-transmitting opening 410 that does not serve as an imaging pinhole, reducing or preventing the adverse effects of stray light on the photosensitivity imaging process of the display substrate 10, and making the image obtained by the display substrate 10 clearer and more accurate.

[0094] It should be noted that in Figure 4A and Figure 4B In the embodiment shown, the first metal light-shielding portion 510 is an octagon, and the outline of the light-transmitting area 530 can correspondingly be an octagon; and in some other embodiments of the present disclosure, the first metal light-shielding portion 510 can also be set to other regular shapes or irregular shapes such as square, hexagon, circle, etc., and accordingly, the light-transmitting area 530 can be other shape outlines, which is not limited by the embodiments of the present disclosure.

[0095] It should be noted that Figure 4A and Figure 4BThe shape of the second electrode 522 of the light-emitting element 520 in the illustrated embodiment is merely illustrative. As long as the second electrode 522 can block the light-transmitting area 530 in a direction perpendicular to the base substrate of the display substrate 10, the embodiment of the present disclosure does not limit the specific shape or structure of the second electrode 522.

[0096] Below, the display substrate 10 provided in some embodiments of the present disclosure is described in detail with reference to the cross-sectional structure of the display substrate 10 .

[0097] Figure 5A A schematic diagram of a partial cross-sectional structure of a display substrate provided in some embodiments of the present disclosure, for example Figure 5A For the Figure 4B Schematic diagram of the cross-sectional structure of the AA' line in FIG.

[0098] For example, combined with Figures 4A-5A As shown, the display substrate 10 includes a base substrate 100, a driving circuit 310, a light-emitting element 320, and a metal light-shielding layer. The driving circuit 310 is located on the base substrate 100, the metal light-shielding layer is located on the side of the driving circuit 310 away from the base substrate 100, and the light-emitting element 320 is located on the side of the metal light-shielding layer away from the driving circuit 310.

[0099] For example, the metal light-shielding layer includes a first metal light-shielding portion 510 and a second metal light-shielding portion 520 surrounding the first metal light-shielding portion 510. The first metal light-shielding portion 510 and the second metal light-shielding portion 520 are insulated from each other and have a light-transmitting region 530. The driving circuit 310 includes a first electrode 311 (i.e., the second electrode T52 of the second light-emitting control transistor T5). The first electrode 311 is electrically connected to the first metal light-shielding portion 510 via a first via 710. The light-emitting element 320 includes a second electrode 322 (e.g., the second electrode 322 can be the anode of the light-emitting element 320). The second electrode 322 is electrically connected to the first metal light-shielding portion 510 via a second via 720. The orthographic projection of the second electrode 322 on the base substrate 100 overlaps with the orthographic projection of the light-transmitting region 530 on the base substrate 100. Thus, by overlapping the second electrode 322 and the light-transmitting area 530 of the metal light-shielding layer in a direction perpendicular to the base substrate 100, the second electrode 322 blocks the light-transmitting area 530 in a direction perpendicular to the base substrate 100, reducing or filtering out stray light incident from the display side of the display substrate 10 from leaking through the light-transmitting area 530. Furthermore, the second electrode 322 cooperates with the first metal light-shielding portion 510 and the second metal light-shielding portion 520 to block the first light-transmitting opening 410 in a direction perpendicular to the base substrate 100, reducing or filtering out stray light incident from the display side of the display substrate 10 from leaking through the first light-transmitting opening 410. Thus, light leakage from the display substrate 10 during fingerprint recognition is reduced or avoided, effectively reducing or avoiding the adverse effects of stray light on fingerprint image acquisition, and making the fingerprint image acquired by the display substrate 10 clearer and more accurate.

[0100] For example, in Figures 4A-5A In some embodiments of the present disclosure, the orthographic projection of the light-transmitting region 530 on the substrate 100 is located within the orthographic projection of the second electrode 322 on the substrate 100, and the area of ​​the orthographic projection of the second electrode 322 on the substrate 100 is larger than the area of ​​the orthographic projection of the light-transmitting region 530 on the substrate 100. Thus, through the interaction between the second electrode 322 and the metal light-shielding layer, the second electrode 322 blocks the entire overlapping area between the first light-transmitting opening 410 and the light-transmitting region 530 in a direction perpendicular to the substrate 100, thereby further reducing or preventing stray light from leaking through the light-transmitting region 530. This further reduces or filters stray light across a wide viewing angle, ensuring that the fingerprint image captured by the photosensitive element of the display substrate 10 maintains a certain imaging angle, thereby obtaining a fingerprint image with a higher signal-to-noise ratio. This significantly improves the clarity of the fingerprint image used for fingerprint recognition on the display substrate 10, thereby optimizing the fingerprint recognition performance of the display substrate 10.

[0101] For example, in some embodiments of the present disclosure, Figure 5AAs shown, the width of the overlap a between the second metal light-shielding portion 520 of the metal light-shielding layer and the second electrode 322 in a direction perpendicular to the base substrate 100, i.e., the width of the overlap between the orthographic projection of the second electrode 322 on the base substrate 100 and the orthographic projection of the second metal light-shielding portion 520 of the metal light-shielding layer on the base substrate 100, can be, for example, 2.5 μm to 4 μm. For example, the value range of the width of the overlap a can be further expanded, thereby further reducing or preventing stray light from the display side of the display substrate 10 from leaking through the light-transmitting region 530, and further reducing or preventing stray light from leaking through the first light-transmitting opening 410. This can further reduce the interference of stray light on the light reflected by the fingerprint captured by the photosensitive element of the display substrate 10, allowing the photosensitive element of the display substrate 10 to obtain a clearer, more accurate fingerprint image with a higher signal-to-noise ratio.

[0102] For example, the second metal light shielding portion 520 of the metal light shielding layer is insulated from the first metal light shielding portion 510 , the first electrode 311 of the driving circuit 310 , and the second electrode 322 of the light emitting element 320 .

[0103] In some embodiments of the present disclosure, the first metal light shielding portion 510 and the second metal light shielding portion 520 of the metal light shielding layer may be configured to receive different electrical signals respectively. For example, the second metal light shielding portion 520 may be configured to receive the first voltage signal ELVDD.

[0104] For example, since the first metal shading portion 510 and the second metal shading portion 520 are made of opaque metal material, and the second metal shading portion 520 is distributed in a continuous sheet shape in the display area of ​​the display substrate 10, the stray light incident from the display side of the display substrate 10 can be blocked over a large area, thereby reducing or avoiding the adverse effects of the stray light on the photosensitivity imaging process of the display substrate 10.

[0105] For example, the second metal light-shielding portion 520 can be electrically connected to the first power line 214 through, for example, a via structure to receive the first voltage signal ELVDD, thereby reducing the transmission resistance of the first voltage signal ELVDD during transmission in the display area of ​​the display substrate 10, and reducing the voltage drop generated by the first voltage signal ELVDD during transmission, thereby improving the brightness uniformity of the display screen provided by the display substrate 10 and improving the display effect.

[0106] In addition, by applying a uniform first voltage signal ELVDD to the second metal shading portion 520, the risk of static electricity generated between the second metal shading portion 520 of the metal shading layer and the first electrode 311 of the driving circuit 310 or the second electrode 322 of the light-emitting element 320 can be reduced or prevented, thereby reducing or avoiding interference with the picture display of the display substrate 10.

[0107] For example, in the process of the metal shading layer and the second electrode 322 of the light-emitting element 320 cooperating with each other to perform shading, since the second metal shading part 520 of the metal shading layer does not need to be electrically connected to the second electrode 322, the setting position of the second metal shading part 520 in the plane parallel to the base substrate 100 can be adjusted according to different actual application requirements, thereby better controlling the size of the overlap amount a between the second metal shading part 520 and the second electrode 322 in the direction perpendicular to the base substrate 100, reducing or avoiding stray light from leaking through the light-transmitting area 530 of the metal shading layer, thereby enabling the display substrate 10 to achieve a better shading effect under the mutual cooperation of the second electrode 322 and the metal shading layer.

[0108] It should be noted that, in some other embodiments of the present disclosure, the second metal light-shielding portions 520 may also be disconnected from each other or insulated from each other, and the embodiments of the present disclosure are not limited to this.

[0109] In some other embodiments of the present disclosure, the area of ​​the orthographic projection of the second electrode 322 on the base substrate 100 may also be equal to the area of ​​the orthographic projection of the light-transmitting area 530 on the base substrate 100. Thus, while ensuring that the second electrode 322 can cover the light-transmitting area 530, the preparation cost of the second electrode 322 can be reduced, thereby reducing the preparation cost and preparation process of the display substrate 10.

[0110] In some other embodiments of the present disclosure, the orthographic projection of the second electrode 322 on the base substrate 100 and the orthographic projection of the light-transmitting area 530 on the base substrate 100 may also partially overlap and partially not overlap, thereby reducing the stray light incident from the display side of the display substrate 10 from leaking through the light-transmitting area 530. The embodiments of the present disclosure are not limited to this.

[0111] It should be noted that the embodiment of the present disclosure does not limit the specific shape of the second electrode 322 , as long as the orthographic projection of the second electrode 322 on the base substrate 100 can at least partially overlap with the orthographic projection of the light-transmitting region 530 on the base substrate 100 .

[0112] For example, combined with Figures 4A-5A As shown, the first light-transmitting opening 410 is configured to allow light incident from the display side of the display substrate 10 to pass through, and the orthographic projection of the first light-transmitting opening 410 on the base substrate 100 partially overlaps with the orthographic projection of the light-transmitting region 530 on the base substrate 100. Therefore, in a pixel unit without an imaging aperture, by having the second electrode 322 shield the light-transmitting region 530 in a direction perpendicular to the base substrate 100, the metal light-shielding layer and the second electrode 322 can cooperate to shield stray light that may enter from the display side of the display substrate 10, thereby reducing stray light leakage to the driving circuit 310.

[0113] In some embodiments of the present disclosure, the orthographic projection of the second electrode 322 on the base substrate 100 at least partially covers the other parts of the orthographic projection of the first light-transmitting opening 410 on the base substrate 100 except the part overlapping with the orthographic projection of the light-transmitting region 530 on the base substrate 100. Figures 4A-5A In the illustrated embodiment, the orthographic projection of the second electrode 322 on the base substrate 100 completely covers the orthographic projection of the first light-transmitting opening 410 on the base substrate 100, except for the portion that overlaps with the orthographic projection of the light-transmitting region 530 on the base substrate 100. Thus, by increasing the overlapping area between the second electrode 322 and the first light-transmitting opening 410 in a direction perpendicular to the base substrate 100, stray light can be further reduced or prevented from leaking through the light-transmitting region 530 and the first light-transmitting opening 410, further reducing or preventing light leakage. This, in turn, reduces or prevents the adverse effects of stray light on the photosensitivity and imaging process of the display substrate 10, resulting in clearer and more accurate images captured by the display substrate 10.

[0114] For example, in some embodiments of the present disclosure, the second electrode 322 is an opaque electrode. For example, the second electrode 322 can be made of an opaque metal material (such as aluminum or silver) or other suitable opaque materials, and the embodiments of the present disclosure are not limited thereto.

[0115] For example, in Figures 4A-5A In some embodiments of the present disclosure shown in FIG, in order to simplify the manufacturing process of the display substrate 10, the second electrode 322 (e.g., the anode) of the light-emitting element 320 is electrically connected to the first metal light-shielding portion 510 of the metal light-shielding layer. For example, the second electrode 322 is configured to receive an anode signal and to connect to the third electrode 321 (e.g., the cathode, see FIG. Figure 2 ) work together to make the light-emitting layer of the corresponding light-emitting element 320 emit light, so that the display substrate 10 performs, for example, a display operation.

[0116] For example, in some other embodiments of the present disclosure, the second electrode 322 (e.g., an anode) of the light-emitting element 320 may also be electrically connected to the first metal light-shielding portion 510 through an electrical connector such as an electrode provided separately and arranged between the light-emitting element 320 and the metal light-shielding layer. The embodiments of the present disclosure are not limited to this.

[0117] For example, in Figures 4A-5AIn some embodiments of the present disclosure shown, in order to simplify the manufacturing process of the display substrate 10, the second electrode T52 of the second light-emitting control transistor T5 (i.e., the first electrode 311 of the driving circuit 310) is configured to be connected to the first metal shading portion 510 of the metal shading layer, and then electrically connected to the second electrode 322 of the light-emitting element 320, that is, the first metal shading portion 510 of the metal shading layer is connected to one electrode of a transistor in the driving circuit of the pixel unit.

[0118] In some other embodiments of the present disclosure, the second electrode T52 of the second light-emitting control transistor T5 can also be electrically connected to the first metal light-shielding portion 510 through an electrical connection member such as an electrode provided separately between the second electrode T52 of the second light-emitting control transistor T5 and the metal light-shielding layer. That is, the first metal light-shielding portion 510 of the metal light-shielding layer can be electrically connected to one electrode of a transistor in the driving circuit of the pixel unit through an electrode provided separately. The embodiments of the present disclosure are not limited to this.

[0119] For example, the metal light shielding layer may include aluminum and titanium, for example, a three-layer metal structure of titanium-aluminum-titanium, or the metal light shielding layer may also be made of other suitable opaque metal materials, and the embodiments of the present disclosure are not limited thereto. For example, in some other embodiments of the present disclosure, the metal light shielding layer may also be made of the same metal material as the source or drain of the transistor in the driving circuit 310, thereby reducing the manufacturing cost of the display substrate 10 and optimizing the manufacturing process of the display substrate 10.

[0120] For example, Figure 5A As shown, the display substrate 10 further includes a first insulating layer 610 disposed between the first electrode 311 of the driving circuit 310 and the metal light shielding layer, and a second insulating layer 620 disposed between the metal light shielding layer and the second electrode 322 of the light-emitting element 320. The first electrode 311 of the driving circuit 310 is electrically connected to the metal light shielding layer via a first via 710 disposed at least within the first insulating layer 610, and the second electrode 322 of the light-emitting element 320 is electrically connected to the metal light shielding layer via a second via 720 disposed at least within the second insulating layer 620. This allows the first electrode 311 and the second electrode 322 to be electrically connected via the first metal light shielding portion 510 of the metal light shielding layer to transmit corresponding electrical signals. For example, if the second electrode 322 is used as the anode of the light-emitting element 320, the first electrode 311 can be configured to provide a corresponding anode signal to the second electrode 322, so that the second electrode 322 cooperates with the cathode (i.e., the third electrode 321) of the light-emitting element 320 to perform corresponding display operations, such as display operations.

[0121] For example, Figure 5AAs shown, the display substrate 10 further includes a buffer layer 670 located on the base substrate 100, and the active layer 312 of the driving circuit 310 is located on the side of the buffer layer 670 away from the base substrate 100. For example, the buffer layer 670 can provide a relatively flat surface for the active layer 312 disposed on the buffer layer 670, thereby performing a planarization function. Furthermore, the buffer layer 670 can also block the intrusion of, for example, impurities, thereby reducing or preventing adverse effects on, for example, the driving circuit 310 and the light-emitting element 320 located on the buffer layer 670. Furthermore, the buffer layer 670 can also provide protection and support for other structural and functional layers located thereon (e.g., the driving circuit, the light-emitting element, etc.).

[0122] For example, Figure 5A As shown, the display substrate 10 further includes a first gate insulating layer 660, a second gate insulating layer 650, and an interlayer insulating layer 640. The first gate insulating layer 660 is located on a side of the buffer layer 670 and the active layer 312 away from the base substrate 100, the second gate insulating layer 650 is located on a side of the first gate insulating layer 660 away from the base substrate 100, and the interlayer insulating layer 640 is located on a side of the second gate insulating layer 650 away from the base substrate 100.

[0123] For example, Figure 5A As shown, the display substrate 10 further includes a passivation layer 630, which is located between the first insulating layer 610 and the interlayer insulating layer 640, for example, on a side of the interlayer insulating layer 640 and the first electrode 311 away from the base substrate 100. For example, the first via 710 at least penetrates the passivation layer 630.

[0124] For example, the first insulating layer 610, the second insulating layer 620, the passivation layer 630, the interlayer insulating layer 640, the first gate insulating layer 660, and the second gate insulating layer 650 are generally formed of an organic insulating material (e.g., an acrylic resin) or an inorganic insulating material (e.g., silicon nitride SiNx or silicon oxide SiOx). For example, the passivation layer 630, the interlayer insulating layer 640, the first gate insulating layer 660, and the second gate insulating layer 650 can be a single-layer structure composed of silicon nitride or silicon oxide, or a double-layer structure composed of silicon nitride and silicon oxide. The embodiments of the present disclosure are not limited to this.

[0125] For example, Figure 5A As shown, the first via hole 710 and the second via hole 720 may be at least partially overlapped in a direction perpendicular to the base substrate 100 , for example, in a hole-in-hole structure.

[0126] In some embodiments, as Figure 5BAs shown, the first via holes 710 and the second via holes 720 may be staggered in a direction perpendicular to the base substrate 100. The embodiment of the present disclosure does not limit the arrangement positions of the first via holes 710 and the second via holes 720 in a direction perpendicular to the base substrate 100.

[0127] For example, in some embodiments of the present disclosure, the light-emitting element 320 of the display substrate 10 further includes a pixel defining layer and a light-emitting layer. The pixel defining layer is located on a side of the second electrode 322 away from the metal light-shielding layer, the light-emitting layer is located on a side of the pixel defining layer away from the second electrode 322, and the third electrode 321 (e.g., cathode) of the light-emitting element 320 is located on a side of the light-emitting layer away from the pixel defining layer.

[0128] For example, the second electrode 322 of the light emitting element 320 is an anode, and the third electrode 321 (see Figure 2 ) is the cathode, the cathode can be a metal with low work function, and the materials of the cathode include magnesium aluminum alloy (MgAl), lithium aluminum alloy (LiAl) or magnesium, aluminum, lithium metal, etc.

[0129] For example, in order to allow the light reflected by the fingerprint to illuminate the photosensitive element, the cathode can be set as a transparent electrode, or a light-transmitting opening can be opened at a position on the cathode corresponding to the imaging hole. The embodiments of the present disclosure are not limited to this.

[0130] For example, the pixel defining layer is generally formed of an organic insulating material (eg, acrylic resin) or an inorganic insulating material (eg, silicon nitride SiNx or silicon oxide SiOx).

[0131] For example, the material of the light-emitting layer of the light-emitting element 320 can be selected according to the color of the light emitted, and the material of the light-emitting layer includes a fluorescent material or a phosphorescent material. Currently, a doping system is generally used, that is, a doping material is mixed into the main light-emitting material to obtain a usable light-emitting material. For example, the main light-emitting material can be a metal compound material, anthracene derivatives, aromatic diamine compounds, triphenylamine compounds, aromatic triamine compounds, benzyl diamine derivatives or triarylamine polymers, etc.

[0132] For example, in the display substrate 10 provided in some embodiments of the present disclosure, the base substrate 100 can be used to provide a buffer. The base substrate 100 can be a flexible substrate made of materials such as polyimide (PI), polypropylene (PP), and polycarbonate (PC).

[0133] For example, the display substrate 10 may further include other structures or functional layers, which is not limited in the embodiments of the present disclosure.

[0134] For example, in some embodiments of the present disclosure, the display substrate may further include a second light-shielding layer. The second light-shielding layer may be located between the metal light-shielding layer and the light-emitting element, and the orthographic projection of the second electrode of the light-emitting element on the substrate, the orthographic projection of the light-transmitting area on the substrate, and the orthographic projection of the second light-shielding layer on the substrate partially overlap with each other. Thus, the second light-shielding layer can cooperate with the metal light-shielding layer and the second electrode of the light-emitting element in a direction perpendicular to the substrate to provide light shielding, further reducing or preventing stray light from leaking from the display side of the display substrate, thereby improving the clarity of the acquired fingerprint image and improving the fingerprint recognition performance of the display substrate.

[0135] For example, since the display substrate 10 can be divided into a plurality of pixel units distributed in an array, and each pixel unit is provided with a light-emitting element 320, the second electrodes 322 of the light-emitting elements 320 in the plurality of pixel units can be distributed in an array on the display substrate 10. Furthermore, to simplify the manufacturing process of the display substrate 10, the plurality of first metal light-shielding portions 510 of the metal light-shielding layer are also distributed in an array on the display substrate 10.

[0136] Figure 6 A partial top view of another display substrate provided in some embodiments of the present disclosure. For example, Figure 6 The pixel unit structure shown includes multiple Figure 4B The pixel unit structure shown.

[0137] For example, Figure 6 As shown, the display substrate 10 may include a plurality of pixel units, such as a first pixel unit B1 , a second pixel unit R2 , and a third pixel unit G3 .

[0138] For example, the first pixel unit B1 may be configured to emit blue light, the second pixel unit R2 may be configured to emit red light, and the third pixel unit G3 may be configured to emit green light.

[0139] For example, Figure 6 As shown, the plurality of first metal light-shielding portions 510 of the metal light-shielding layer are distributed corresponding to the first pixel unit B1, the second pixel unit R2, and the third pixel unit G3. Since the plurality of first metal light-shielding portions 510 transmit, for example, an anode signal to the second electrode 322 of the light-emitting element in the corresponding pixel units B1, R2, and G3, the plurality of first metal light-shielding portions 510 are insulated from each other.

[0140] For example, Figure 6As shown, in order to simplify the manufacturing process of the display substrate 10, the second metal light shielding portions 520 can be electrically connected to each other and formed integrally. For example, the second metal light shielding portions 520 can be distributed in a continuous sheet shape on the display substrate 10. Therefore, in the case where the second metal light shielding portions 520 of the metal light shielding layer are distributed in a continuous sheet shape, since the second metal light shielding portions 520 can substantially cover, for example, the entire display area 101 of the display substrate 10 and the second metal light shielding portions 520 are configured to be connected to the power line (for example, the power line) providing the first voltage signal ELVDD through, for example, a via structure, Figure 2 or Figure 3 The first power line 214 shown in the figure is electrically connected to receive the first voltage signal. Therefore, the transmission resistance of the first voltage signal ELVDD during the transmission process in the display area of ​​the display substrate 10 can be reduced by the second metal shading portion 520, and the voltage drop generated by the first voltage signal ELVDD during the transmission process can be reduced, thereby improving the brightness uniformity of the display screen provided by the display substrate 10, so that the display substrate 10 can achieve a more uniform brightness display effect when used to display light.

[0141] For example, within the fingerprint recognition area of ​​the display substrate 10, imaging apertures are provided within pixel units (e.g., first pixel unit B1, second pixel unit R2, and third pixel unit G3) at a predetermined interval to implement fingerprint recognition. For example, the imaging apertures may be periodically arranged within the fingerprint recognition area. For example, an imaging aperture may be provided every other pixel unit, depending on actual needs. This is not a limitation in the present disclosure.

[0142] Figure 7 A partial top view of another display substrate provided in some embodiments of the present disclosure is shown, for example, Figure 7 To correspond to Figure 1 FIG. 1 is a partial top view of a pixel unit with an imaging hole set in the fingerprint recognition area 102 of the display substrate 10 shown in FIG.

[0143] It should be noted that Figure 7 The partial top view structure of the display substrate 10 shown in FIG. 1 is similar to that of FIG. 1 except that a metal light shielding layer and a second electrode 322 of the light emitting element 320 are added. Figure 3 The partial top view structure of the display substrate 10 shown in is substantially the same or similar, and will not be described in detail here.

[0144] For example, Figure 7As shown, in the pixel unit for fingerprint recognition in the display substrate 10, the orthographic projection of the light-transmitting area 530 on the base substrate (not shown) overlaps with the orthographic projection of the first light-transmitting opening 410 on the base substrate, that is, in the direction perpendicular to the base substrate 100, the first metal light-shielding portion 510 and the second metal light-shielding portion 520 corresponding to the first light-transmitting opening 410 are hollowed out, so that light incident from the display side of the display substrate 10 can pass through the light-transmitting area 530 and further pass through the first light-transmitting opening 410 to illuminate, for example, a photosensitive element for imaging.

[0145] For example, Figure 7 As shown, the second electrode 322 includes a second light-transmitting opening 420, which is configured to allow light incident from the display side of the display substrate 10 to pass through and further pass through the light-transmitting area 530 and the first light-transmitting opening 410, thereby allowing the light incident from the display side of the display substrate 10 to illuminate the photosensitive element for imaging, thereby enabling the display substrate 10 to realize the fingerprint recognition function.

[0146] For example, Figure 7 As shown, the orthographic projection of the second light-transmitting opening 420 on the base substrate is located within the orthographic projection of the first light-transmitting opening 410 on the base substrate, and the area of ​​the orthographic projection of the second light-transmitting opening 420 on the base substrate is equal to the area of ​​the orthographic projection of the first light-transmitting opening 410 on the base substrate, that is, in the direction perpendicular to the base substrate 100, the portion of the second electrode 322 corresponding to the first light-transmitting opening 410 is hollowed out to form the second light-transmitting opening 420.

[0147] For example, Figure 7 As shown, the second light-transmitting opening 420, the light-transmitting area 530 and the first light-transmitting opening 410 form a rectangular through hole that penetrates the second electrode 322, the metal light-shielding layer and the driving circuit 310, which serves as an imaging hole, so that the light reflected by the finger fingerprint is irradiated through the imaging hole to the display substrate 10, for example, a photosensitive element for imaging, so that the display substrate 10 can realize the fingerprint recognition function according to the acquired fingerprint image.

[0148] For example, the orthographic projection of the first light-transmitting opening 410 on the base substrate 100 is located within the orthographic projection of the photosensitive element on the base substrate 100, so that the light reflected by the fingerprint can be basically collimated from the display side of the display substrate 10 through the rectangular imaging hole formed by the second light-transmitting opening 420, the light-transmitting area 530 and the first light-transmitting opening 410 to irradiate the photosensitive element, so that the fingerprint image collected by the photosensitive element is clearer and more accurate.

[0149] For example, in the fingerprint recognition area of ​​the display substrate 10, imaging holes are set in the pixel units at a certain interval to realize the fingerprint recognition operation. For example, in the pixel unit where the imaging hole is required, a second light-transmitting opening 420 is opened on the second electrode 322, and the second light-transmitting opening 420, the light-transmitting area 530 and the first light-transmitting opening 410 form a rectangular through-hole that penetrates the second electrode 322, the metal light-shielding layer and the driving circuit 310 to serve as the imaging hole. For example, in the case where the imaging holes are arranged periodically in the fingerprint recognition area, the second light-transmitting openings 420 arranged periodically are correspondingly opened on the second electrode 322 to form the imaging holes. For example, according to different actual needs, an imaging hole can be set at intervals between multiple pixel units, that is, the portions of the second electrode 322 and the metal light-shielding layer corresponding to the first light-transmitting opening 410 are hollowed out at intervals between multiple pixel units. The embodiment of the present disclosure does not limit the arrangement density of the imaging holes.

[0150] At least one embodiment of the present disclosure also provides a method for manufacturing a display substrate, the manufacturing method comprising: providing a base substrate; forming a first electrode of a driving circuit on the base substrate; forming a metal light-shielding layer on the first electrode; and forming a second electrode of a light-emitting element on the metal light-shielding layer. The metal light-shielding layer comprises a first metal light-shielding portion and a second metal light-shielding portion that at least partially surrounds the first metal light-shielding portion, the first metal light-shielding portion and the second metal light-shielding portion being insulated from each other and having a light-transmitting area. The first electrode is electrically connected to the first metal light-shielding portion through a first via, and the second electrode is electrically connected to the first metal light-shielding portion through a second via. The orthographic projection of the second electrode on the base substrate and the orthographic projection of the light-transmitting area on the base substrate at least partially overlap.

[0151] For example, the manufacturing method of the display substrate provided by at least one embodiment of the present disclosure also includes: forming a first insulating layer between the first electrode and the metal shading layer, and forming a first via hole in the first insulating layer; and forming a second insulating layer between the second electrode and the metal shading layer, and forming a second via hole in the second insulating layer.

[0152] For example, the manufacturing method of the display substrate provided in some embodiments of the present disclosure may include more or fewer steps, and the order of the steps is not limited and can be determined according to actual needs. For details and technical effects of the manufacturing method, please refer to the description of the display substrate 10 above and will not be repeated here.

[0153] At least one embodiment of the present disclosure further provides a display device, which includes the display substrate described in any embodiment of the present disclosure, for example, the display substrate 10 described above.

[0154] The technical effects and implementation principles of the display device provided by the embodiment of the present disclosure are basically the same as or similar to the display substrate described in the embodiment of the present disclosure, and will not be repeated here.

[0155] For example, the display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as a liquid crystal panel, electronic paper, OLED panel, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, etc., and the embodiments of the present disclosure are not limited to this.

[0156] For example, in some embodiments of the present disclosure, the display device may further include a fingerprint image processor, a pressure sensor, and a controller. The fingerprint image processor is configured to analyze and process a fingerprint image captured by a photosensitive element, for example, to perform fingerprint recognition. The pressure sensor is configured to sense a pressing action on the display side of the display device. The controller is coupled or signal-connected to the pressure sensor, the photosensitive element, and the fingerprint image processor, respectively.

[0157] For example, when the pressure sensor senses a pressing action on the display side of the display device, a feedback signal is generated. After receiving the feedback signal sent by the pressure sensor, the controller controls the display device to emit light, that is, to light up the screen. For example, the light-emitting element of the display device itself can emit light, or an external light source (such as a backlight) can cause the display device to emit light. At the same time, the controller can also control the photosensitive element to start to collect a fingerprint image, and send the fingerprint image to the fingerprint image processor for user fingerprint identification and verification. In addition, the fingerprint image processor can also send the fingerprint identification result to the controller, so that the controller can perform subsequent predetermined operations based on the fingerprint identification result.

[0158] For example, when the controller controls the display device to emit light to illuminate the screen, the system of a mobile phone or tablet computer can be in a standby state, waiting for the user to enter a password, etc. to unlock the system; accordingly, when the fingerprint recognition is successful, the controller controls the system of the mobile phone or tablet computer to enter a working state, such as displaying the operating interface of the application before the screen is in the off state, etc. The embodiments of the present disclosure are not limited to this.

[0159] For example, the fingerprint image processor can be implemented by a general-purpose processor or a dedicated processor. The controller can be any type of integrated circuit chip with processing capabilities, which can have various computing architectures, such as a complex instruction set computer (CISC) architecture, a reduced instruction set computer (RISC) architecture, or an architecture that implements a combination of multiple instruction sets. In some embodiments, the controller can be a microprocessor, such as an X86 processor or an ARM processor, or a digital signal processor (DSP).

[0160] For example, the display device provided by the embodiment of the present disclosure may further include other devices, such as a driver chip, a memory, etc., which is not limited by the embodiment of the present disclosure.

[0161] There are a few points to note:

[0162] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0163] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present disclosure are exaggerated or reduced, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element, or intervening elements may be present.

[0164] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0165] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display substrate, comprising: Base substrate, driving circuit, light emitting element and metal light shielding layer; The driving circuit is located on the base substrate, the driving circuit includes a first light-transmitting opening, and the first light-transmitting opening is configured to allow light incident from the display side of the display substrate to pass through. The metal light-shielding layer is located on a side of the driving circuit away from the base substrate, and the light-emitting element is located on a side of the metal light-shielding layer away from the driving circuit. The metal light-shielding layer includes a first metal light-shielding portion and a second metal light-shielding portion at least partially surrounding the first metal light-shielding portion. The first metal light-shielding portion and the second metal light-shielding portion are insulated from each other and have a light-transmitting area; The driving circuit includes a first electrode, and the first electrode is electrically connected to the first metal light-shielding portion through a first via hole; The light emitting element includes a second electrode, and the second electrode is electrically connected to the first metal light shielding portion through a second via hole; The orthographic projection of the second electrode on the base substrate and the orthographic projection of the light-transmitting area on the base substrate at least partially overlap; The orthographic projection of the first light-transmitting opening on the base substrate partially overlaps with the orthographic projection of the light-transmitting area on the base substrate.

2. The display substrate according to claim 1, wherein The orthographic projection of the light-transmitting area on the base substrate is located within the orthographic projection of the second electrode on the base substrate.

3. The display substrate according to claim 2, wherein: An orthographic projection area of ​​the second electrode on the base substrate is larger than an orthographic projection area of ​​the light-transmitting region on the base substrate.

4. The display substrate according to claim 1, wherein: The orthographic projection of the second electrode on the base substrate at least partially covers other parts of the orthographic projection of the first light-transmitting opening on the base substrate except for a part overlapping with the orthographic projection of the light-transmitting area on the base substrate.

5. The display substrate according to any one of claims 1 to 3, wherein: The driving circuit further includes a first transistor, The first electrode is configured as a source or a drain of the first transistor.

6. The display substrate according to any one of claims 1 to 3, wherein: The driving circuit further includes a first transistor, The first transistor is located on a side of the first electrode away from the metal light shielding layer. A source or a drain of the first transistor is electrically connected to the first electrode.

7. The display substrate according to any one of claims 1 to 3, wherein: The first via hole and the second via hole are at least partially overlapped in a direction perpendicular to the substrate, or The first via holes and the second via holes are staggered in a direction perpendicular to the base substrate.

8. The display substrate according to any one of claims 1 to 3, wherein: The orthographic projection of the first via hole on the base substrate and the orthographic projection of the second via hole on the base substrate at least partially overlap, or An orthographic projection of the first via hole on the base substrate and an orthographic projection of the second via hole on the base substrate do not overlap with each other.

9. The display substrate according to any one of claims 1 to 3, further comprising a first insulating layer and a second insulating layer. in, The first insulating layer is located between the first electrode and the metal light shielding layer, and the second insulating layer is located between the second electrode and the metal light shielding layer. The first via hole is provided in the first insulating layer, and the second via hole is provided in the second insulating layer.

10. The display substrate according to any one of claims 1 to 3, wherein: The second electrode is an opaque electrode.

11. The display substrate according to any one of claims 1 to 3, wherein: The first metal light-shielding portion and the second metal light-shielding portion are configured to receive different electrical signals, respectively.

12. The display substrate according to any one of claims 1 to 3, wherein: The light-emitting element further includes a pixel defining layer, a light-emitting layer and a third electrode. The pixel defining layer is located on a side of the second electrode away from the metal light shielding layer. The light emitting layer is located on a side of the pixel defining layer away from the second electrode. The third electrode is located on a side of the light emitting layer away from the pixel defining layer.

13. The display substrate according to claim 1, further comprising a photosensitive element. in, The photosensitive element is located on a side of the driving circuit away from the metal light shielding layer and is configured to receive light incident from the display side of the display substrate and passing through the first light-transmitting opening.

14. The display substrate according to claim 13, wherein: The orthographic projection of the first light-transmitting opening on the base substrate is located within the orthographic projection of the photosensitive element on the base substrate.

15. A display device comprising the display substrate according to claim 1.

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