Display substrate and display device

Abstract

The present disclosure provides a display substrate and a display device. The display substrate comprises a drive circuit layer, a first scanning line and a second scanning line, wherein the drive circuit layer comprises pixel units arranged in an array, each pixel unit comprises a plurality of sub-pixels, at least one sub-pixel comprises a pixel drive circuit, the pixel drive circuit comprises a first transistor and a second transistor, an active pattern of the first transistor comprises a first channel region, an active pattern of the second transistor comprises a second channel region, the first channel region is located on the side of the first scanning line away from the second scanning line, and the second channel region is located on the side of the second scanning line away from the first scanning line.

Description

Display substrate and display device Technical Field

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

[0002] With the continuous development of display technology, the application range of display products is becoming wider and wider, and display products with high resolution and high refresh rate are becoming more and more popular. However, medium and large-sized display products cannot fully realize the product function of high refresh rate due to the limitation of large load.

[0003] Summary of the Invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] In one aspect, the present disclosure provides a display substrate, comprising: a base substrate;

[0006] A driving circuit layer, comprising pixel units distributed in an array, at least one of the pixel units comprising a plurality of sub-pixels, wherein at least one of the sub-pixels comprises a pixel driving circuit, the pixel driving circuit comprising a light-emitting device, a plurality of transistors, and a storage capacitor; the plurality of transistors comprising a first transistor and a second transistor, the first transistor and the second transistor being coupled;

[0007] a plurality of scan lines, the plurality of scan lines comprising a first scan line and a second scan line, the first scan line and the second scan line both extending along a first direction and sequentially arranged along a second direction, the first direction being an extending direction of the sub-pixel rows, and the second direction being an extending direction of the sub-pixel columns;

[0008] Wherein, the multiple transistors include active patterns, and the active pattern of each transistor includes a channel region and a conductive region. The active pattern of the first transistor includes a first channel region, and the active pattern of the second transistor includes a second channel region. The first channel region is located on a side of the first scan line away from the second scan line, and the second channel region is located on a side of the second scan line away from the first scan line.

[0009] Optionally, the display substrate further comprises a plurality of signal lines; the plurality of signal lines comprises a first signal line and a second signal line;

[0010] The first signal line is coupled to the first electrode of the first transistor; the second signal line is coupled to the first electrode of the second transistor; the first transistor T1 is configured to transmit the voltage signal of the first signal line to the second electrode of the first transistor under the control of the first scan line signal;

[0011] The second transistor is configured to transmit the voltage signal of the second signal line to the second electrode of the second transistor under the control of the second scan line signal;

[0012] The second electrode of the first transistor and the second electrode of the second transistor are coupled to a first node.

[0013] Optionally, the plurality of scan lines further include a third scan line, and the plurality of signal lines further include a power line;

[0014] The third scan line includes a first branch scan line extending along the first direction and a second branch scan line extending along the second direction, and the first branch scan line and the second branch scan line are coupled;

[0015] The plurality of transistors further include a third transistor and a driving transistor;

[0016] The storage capacitor includes a first plate and a second plate;

[0017] The second electrode of the third transistor, the gate of the driving transistor, and the first plate of the storage capacitor are coupled to a second node, the gate of the third transistor is coupled to the third scan line, and the first electrode of the third transistor is coupled to the first node; the third transistor is configured to transmit the voltage of the first node to the second node under the control of the third scan line signal;

[0018] In the same row of sub-pixels, the first branch scan line is located on a side of the first scan line away from the second scan line.

[0019] Optionally, the plurality of transistors further include a fourth transistor and a fifth transistor; the plurality of scan lines further include a light-emitting scan line and a fourth scan line; and the plurality of signal lines further include a third signal line;

[0020] The light-emitting scanning line extends along the first direction;

[0021] The gate of the fourth transistor is coupled to the light-emitting scan line, the first electrode of the fourth transistor is coupled to the power line, and the second electrode of the fourth transistor is coupled to the first electrode of the driving transistor; the fourth transistor is configured to transmit a voltage signal provided by the power line to the second electrode of the driving transistor under the control of the light-emitting scan line signal;

[0022] The gate of the fifth transistor is coupled to the fourth scan line, the first electrode of the fifth transistor is coupled to the third signal line, and the second electrode of the fifth transistor is coupled to the light-emitting device; the fifth transistor is configured to transmit the voltage signal of the third signal line to the light-emitting device under the control of the fourth scan line signal.

[0023] Optionally, the power line includes a first power line extending along the first direction and a second power line extending along the second direction, the first power line and the second power line being coupled to each other; in the same row of sub-pixels, the first power line is located on a side of the light-emitting scan line away from the first scan line;

[0024] The third signal line includes a first sub-line extending along the first direction and a second sub-line extending along the second direction, the first sub-line and the second sub-line being coupled;

[0025] The fourth scan line extends along the first direction, and in the same row of sub-pixels, the fourth scan line is located on a side of the first power line away from the light-emitting scan line;

[0026] The first sub-line is located on a side of the fourth scan line away from the first scan line.

[0027] Optionally, the pixel driving circuits of the multiple sub-pixels form M sub-pixel rows and N sub-pixel columns, where M and N are positive integers greater than or equal to 1; and at least two sub-pixels in the same column are coupled to the same first signal line.

[0028] Optionally, the display substrate further comprises a plurality of control regions, each of which comprises at least one repeating unit;

[0029] The third scan line is coupled to the gate of the third transistor included in each of the repeating units, and is used to control the conduction or cutoff of the third transistor included in each of the repeating units in the corresponding control area.

[0030] Along the first direction, within the same control area, the first branch scan lines coupled to the sub-pixels in the repeating unit are coupled; between the control areas, the first branch scan lines are disconnected.

[0031] Optionally, an orthographic projection of the second power line on the base substrate does not overlap with an orthographic projection of the first branch scan line on the base substrate.

[0032] Optionally, an orthographic projection of the first power line on the base substrate overlaps with an orthographic projection of the second branch scanning line on the base substrate.

[0033] Optionally, in a direction perpendicular to the base substrate, the driving circuit layer includes an active layer, a first conductive layer, a second conductive layer, a third conductive layer and a fourth conductive layer sequentially arranged on the base substrate;

[0034] The active layer includes active patterns of the plurality of transistors, and the active patterns include a channel region and a conductive region;

[0035] The first conductive layer includes gates of the plurality of transistors, a second branch scanning line and a second sub-line;

[0036] The second conductive layer includes a second plate of the storage capacitor;

[0037] The third conductive layer includes the first scan line, the second scan line, the first branch scan line, the light-emitting scan line, the fourth scan line, the second signal line, the first power line and the first sub-line;

[0038] The fourth conductive layer includes the first signal line and the second power line.

[0039] Optionally, the distance between the second signal line and the second scan line is greater than or equal to the distance between the first scan line and the second scan line.

[0040] Optionally, an interlayer insulating layer is provided between the second conductive layer and the third conductive layer, the interlayer insulating layer includes a first via structure, and the first via structure includes a first via and a second via;

[0041] The orthographic projection of the gate of the first transistor on the base substrate at least partially overlaps with the orthographic projection of the first scan line on the base substrate to form a first overlapping region; the orthographic projection of the first via on the base substrate is located in the first overlapping region;

[0042] The orthographic projection of the gate of the second transistor on the base substrate at least partially overlaps with the orthographic projection of the second scan line on the base substrate to form a second overlapping region; the orthographic projection of the second via on the base substrate is located in the second overlapping region;

[0043] A distance between the first via hole and the second via hole is greater than a distance between the first scan line and the second scan line.

[0044] Optionally, the first branch scan line includes a first connection portion, and in the same row of sub-pixels, the first connection portion is located on a side of the first branch scan line away from the light-emitting scan line;

[0045] The first via structure includes a ninth via, the second branch scan line is coupled to the first branch scan line through the ninth via, and the orthographic projection of the ninth via on the base substrate is within the orthographic projection of the first connection portion on the base substrate.

[0046] Optionally, the first plate of the storage capacitor includes a first sub-plate and a second sub-plate, the first sub-plate is located in the first conductive layer, and the second sub-plate is located in the third conductive layer; the third conductive layer includes a second connecting portion;

[0047] The first via structure includes a fifteenth via and a sixteenth via, the second sub-plate is coupled to the first sub-plate through the fifteenth via, and the second sub-plate is coupled to the second node through the sixteenth via;

[0048] The orthographic projections of the fifteenth via hole and the sixteenth via hole on the base substrate are located within the orthographic projection of the second connecting portion on the base substrate.

[0049] Optionally, the side of the third conductive layer away from the base substrate includes a first organic layer, the first organic layer includes a second via structure, the first via structure includes a twelfth via, and the second via structure includes an eighteenth via;

[0050] The first signal line is coupled to the first electrode of the first transistor through the twelfth via hole and the eighteenth via hole, wherein the orthographic projections of the eighteenth via hole and the twelfth via hole on the substrate have an overlapping area;

[0051] The third conductive layer further includes a third connecting portion, and an orthographic projection of the third connecting portion on the base substrate covers an orthographic projection of the eighteenth via hole and an orthographic projection of the twelfth via hole on the base substrate.

[0052] Optionally, the second via structure includes a twentieth via, and the second power line is coupled to the first power line through the twentieth via;

[0053] The first power line includes a fourth connection portion, and in the same row of sub-pixels, the fourth connection portion is located on a side of the first power line close to the fourth scan line;

[0054] An orthographic projection of the twentieth via hole on the base substrate partially overlaps with an orthographic projection of the fourth connecting portion on the base substrate.

[0055] Optionally, a width of the twentieth via hole along the first direction is smaller than a width along the second direction.

[0056] Optionally, it includes a light-emitting device layer, which is located on the side of the fourth conductive layer away from the base substrate; the light-emitting device layer includes a first electrode layer, a pixel defining layer, a light-emitting functional layer and a second electrode layer, wherein the first electrode layer includes a plurality of first electrodes corresponding one-to-one to the plurality of sub-pixels.

[0057] Optionally, the side of the fourth conductive layer away from the base substrate includes a second organic layer, the second organic layer includes a fourth via structure, the fourth via structure includes a twenty-first via, and the multiple first electrodes are coupled to the seventh connecting portion through the twenty-first via, thereby achieving coupling with the second plate of the storage capacitor and the second electrode of the driving transistor.

[0058] Optionally, the fourth conductive layer further includes an auxiliary electrode, the auxiliary electrode includes an eighth connecting portion, and when viewed from a top view, the eighth connecting portion is located on the left side of the auxiliary electrode.

[0059] Optionally, the pixel definition layer includes a first pixel definition layer and a second pixel definition layer, the first pixel definition layer is arranged along the first direction and extends along the second direction, the first pixel definition layer and the second pixel definition layer define the opening area of ​​each sub-pixel, and the light-emitting area of ​​each sub-pixel is located within the opening area; in the direction perpendicular to the substrate, the height of the second pixel definition layer is greater than the height of the first pixel definition layer.

[0060] Optionally, the multiple sub-pixels are divided into multiple repeating units distributed in an array, each repeating unit includes two sub-units arranged along the first direction, and each sub-unit includes multiple sub-pixels arranged along the first direction; within the repeating unit, the pixel definition structure between adjacent sub-pixels in two adjacent sub-units is an integrated structure.

[0061] Optionally, within the multiple repeating units, the first pixel definition layer includes a first pattern, the second pixel definition layer includes a second pattern, and the orthographic projection of the second pattern on the base substrate covers the orthographic projection of the first pattern on the base substrate.

[0062] Optionally, the fourth via structure includes a twenty-second via, the second pattern includes a twenty-third via, and the second electrode layer is coupled to the auxiliary electrode through the twenty-third and twenty-second vias;

[0063] The orthographic projection of the twenty-third via hole on the base substrate covers the orthographic projection of the twenty-second via hole on the base substrate.

[0064] Optionally, the first electrode layer includes a ninth connecting portion, the orthographic projection of the eighth connecting portion on the base substrate is located within the orthographic projection of the ninth connecting portion on the base substrate; and the orthographic projection of the eighth connecting portion on the base substrate covers the twenty-second via hole.

[0065] Optionally, the twenty-third via hole is located at the center of the second pattern.

[0066] Based on the technical solution of the above-mentioned display substrate, a second aspect of the present disclosure provides a display device including the above-mentioned display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0068] FIG1 is a partial schematic diagram of a planar structure of a display device.

[0069] FIG. 2 is a partial schematic diagram of the structure of a display substrate.

[0070] FIG3 is a partial schematic diagram of an equivalent circuit of a pixel driving circuit.

[0071] FIG4 is a partial schematic diagram of an equivalent circuit of a pixel driving circuit.

[0072] FIG5 is a partial schematic diagram of the circuit structure of the repeating unit provided in an embodiment of the present disclosure.

[0073] FIG6 is a partial schematic diagram of the resistance-capacitance equivalent of a partitioned scan line provided by an embodiment of the present disclosure.

[0074] FIG7 is a driving timing diagram provided by an embodiment of the present disclosure.

[0075] FIG8 is a partial schematic diagram of an active layer pattern provided in an embodiment of the present disclosure.

[0076] FIG9 is a partial schematic diagram of a first conductive layer pattern provided in an embodiment of the present disclosure.

[0077] FIG10 is a partial schematic diagram of a second conductive layer pattern provided in an embodiment of the present disclosure.

[0078] FIG11 is a partial schematic diagram of a stacked structure of an active layer pattern, a first conductive layer pattern, and a second conductive layer pattern provided by an embodiment of the present disclosure.

[0079] FIG12 is a partial schematic diagram of a via structure penetrating an interlayer insulating layer provided by an embodiment of the present disclosure.

[0080] FIG13 is a partial schematic diagram of the third conductive layer pattern provided in an embodiment of the present disclosure.

[0081] FIG14 is a partial schematic diagram of a stacked structure of an active layer pattern, a first conductive layer pattern, a second conductive layer pattern, and a third conductive layer pattern provided by an embodiment of the present disclosure.

[0082] FIG15 is a partial schematic diagram of a via structure penetrating the first organic layer provided in an embodiment of the present disclosure.

[0083] FIG16 is a partial schematic diagram of a via structure penetrating the first passivation layer provided in an embodiment of the present disclosure.

[0084] FIG17 is a partial schematic diagram of the fourth conductive layer pattern provided in an embodiment of the present disclosure.

[0085] FIG18 is a partial schematic diagram of a stacked structure of an active layer pattern, a first conductive layer pattern, a second conductive layer, a third conductive layer pattern, and a fourth conductive layer pattern provided by an embodiment of the present disclosure.

[0086] FIG19 is a partial schematic diagram of a via structure penetrating the second passivation layer provided in an embodiment of the present disclosure.

[0087] FIG20 is a partial schematic diagram of a via structure penetrating the second organic layer provided in an embodiment of the present disclosure.

[0088] FIG21 is a partial schematic diagram of the first electrode layer pattern provided in an embodiment of the present disclosure.

[0089] 22 is a partial schematic diagram of a stacked structure of an active layer pattern, a first conductive layer pattern, a second conductive layer, a third conductive layer pattern, a fourth conductive layer and a first electrode layer pattern provided in an embodiment of the present disclosure.

[0090] FIG23 is a partial schematic diagram of the first pixel definition layer pattern provided in an embodiment of the present disclosure.

[0091] FIG24 is a partial schematic diagram of the second pixel definition layer pattern provided in an embodiment of the present disclosure.

[0092] Figure 25 is a partial schematic diagram of the stacked structure of the active layer pattern, the first conductive layer pattern, the second conductive layer, the third conductive layer pattern, the fourth conductive layer, the first electrode layer, the first pixel definition layer and the second pixel definition layer pattern provided in an embodiment of the present disclosure.

[0093] FIG26 is a schematic diagram of the cross-sectional structure of the line AA′ in FIG25 provided by an embodiment of the present disclosure.

[0094] Description of the accompanying drawings:

[0095] 01—display device; 10—display substrate; 20—display driver circuit;

[0096] 101—substrate; 102—buffer layer; 103—active layer;

[0097] 104—gate insulating layer; 105—first conductive layer; 106—first insulating layer;

[0098] 107—second conductive layer; 108—interlayer insulating layer; 109—third conductive layer;

[0099] 110—first organic layer; 111—first passivation layer; 112—fourth conductive layer

[0100] 113—second passivation layer; 114—second organic layer; 115—first electrode layer;

[0101] 116—light-emitting functional layer; 117—second electrode layer; 118—first pixel definition layer;

[0102] 119—Second pixel definition layer; 120—Pixel definition layer. DETAILED DESCRIPTION

[0103] In order to further illustrate the display substrate and the display device provided by the embodiments of the present invention, they are described in detail below with reference to the accompanying drawings.

[0104] 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 are now clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present disclosure. The embodiments described below are part of the embodiments of the present disclosure and not all of the embodiments. Based on the embodiments described in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0105] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons having ordinary skill in the art to which this invention belongs. In this specification, ordinal numbers such as "first," "second," "third," and "fourth" are provided to avoid confusion among constituent elements and are not intended to limit quantities.

[0106] In this disclosure, for convenience, words and phrases indicating orientation or positional relationships, such as "center," "upper," "lower," "left," and "inner," are used to illustrate the positional relationships of components with reference to the accompanying drawings. This is solely for the purpose of facilitating the description of this specification and simplifying the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. The positional relationships of the components may be appropriately modified depending on the direction in which the components are described. Therefore, the terms and phrases described in this specification are not limited and may be appropriately modified depending on the circumstances.

[0107] In this disclosure, unless otherwise expressly specified and limited, the terms "connected", "connected", and "coupled" should be understood in a broad sense. For example, the terms "connected" or "coupled" may be used when describing some embodiments. It can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate component, or the internal connection of two elements. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0108] In this disclosure, a transistor refers to a device that includes at least three terminals: a gate, a drain electrode, and a source electrode. A transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0109] In this disclosure, the first electrode can be a drain electrode and the second electrode can be a source electrode, or vice versa. The functions of "source electrode" and "drain electrode" may be interchanged when using transistors with opposite polarity or when the direction of current changes during circuit operation. Therefore, in this specification, "source electrode" and "drain electrode" may be interchanged.

[0110] In the present disclosure, "electrical connection" includes the situation where constituent elements are connected together through an element with some electrical function. There is no special limitation on the "element with some electrical function" as long as it can transfer electrical signals between the connected constituent elements. Examples of "element with some electrical function" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with various functions. The proportions of the drawings in the present disclosure can be used as a reference in the actual process, but are not limited to this. For example: the width-to-length ratio of the channel, the thickness and spacing of each film layer, the width and spacing of each signal line can be adjusted according to actual needs. The number of pixels in the display substrate and the number of sub-pixels in each pixel are not limited to the numbers shown in the figure. The drawings described in the present disclosure are only structural schematics.

[0111] In this disclosure, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer." The term "about" in this disclosure refers to values ​​that are not strictly defined and allow for process and measurement errors.

[0112] Some embodiments of the present disclosure provide a display device. It should be noted that the display device includes any product or component with a display function, such as a television, monitor, digital photo frame, mobile phone, tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board, and a backplane.

[0113] Figure 1 is a schematic diagram of the planar structure of a display device provided by an embodiment of the present disclosure. As shown in Figure 1 , display device 01 includes a display substrate 10, which includes a display area AA and a non-display area SA. The non-display area SA can be located on at least one side of the display area AA. For example, the non-display area SA can be arranged around the display area AA.

[0114] The display device may be an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, a micro light emitting diode (including miniLED or microLED) display panel, etc.

[0115] In an exemplary embodiment, the display substrate 10 may be rectangular, curved, or other irregular shapes. For example, as shown in FIG1 , the display substrate is a rectangular shape with curved corners. For ease of description, the display area AA is schematically configured as a rectangle, with the directions of two mutually perpendicular sides extending in a first direction (X-axis direction) and a second direction (Y-axis direction), respectively.

[0116] The display device 01 may further include other components, such as a display driver integrated circuit (DDIC) 20 . The DDIC 20 is coupled to the display substrate 10 , for example, may be bonded to the display substrate 10 , and is configured to provide data signals to the display substrate 10 .

[0117] In an exemplary embodiment, the display substrate 10 includes a plurality of pixel units P arranged in an array, with at least one pixel unit P including a plurality of sub-pixels. The plurality of sub-pixels may include a first sub-pixel SP1 for emitting a first color of light, a second sub-pixel SP2 for emitting a second color of light, a third sub-pixel SP3 for emitting a third color of light, and a fourth sub-pixel SP4 for emitting a fourth color of light. For example, the first sub-pixel SP1 may be a red sub-pixel (R) emitting red light, the second sub-pixel SP2 may be a blue sub-pixel (B) emitting blue light, the third sub-pixel SP3 may be a green sub-pixel (G) emitting green light, and the fourth sub-pixel SP4 may be a white sub-pixel (W) emitting white light. In an exemplary embodiment, each pixel unit P may include three sub-pixels (e.g., including RGB) or four sub-pixels (e.g., RGBW), without specific limitation herein. This disclosure describes an example in which each pixel unit includes three sub-pixels (RGB).

[0118] Figure 2 is a schematic diagram of the structure of a display substrate provided by an embodiment of the present disclosure. As shown in Figure 2, the display substrate 10 includes a plurality of pixel drive circuits Q arranged in an array and light-emitting devices coupled to the pixel drive circuits Q. The light-emitting devices can be OLEDs or QLEDs. The light-emitting devices are configured to respond to signals output by the pixel drive circuits of the sub-pixels in which they are located, thereby emitting light of corresponding brightness.

[0119] In an exemplary embodiment, the pixel driving circuits of a plurality of sub-pixels may form M sub-pixel rows and N sub-pixel columns, wherein M and N are both positive integers greater than or equal to 1. For example, a row of pixel driving circuits distributed along a first direction is referred to as the same row of pixel driving circuits, and a column of pixel driving circuits distributed along a second direction is referred to as the same column of pixel driving circuits. In the present disclosure, the first direction is the extension direction of the sub-pixel row, and the second direction is the extension direction of the sub-pixel column. Exemplarily, the present disclosure provides an array arrangement diagram of adjacent sub-pixel rows and adjacent sub-pixel columns, i.e., the m-1th row and the mth row, and the n-1th column and the nth column, wherein m is a positive integer greater than 1 and less than or equal to M, and n is a positive integer greater than 1 and less than or equal to N.

[0120] The pixel driving circuit Q includes a plurality of transistors and a storage capacitor. The transistor may be a thin film transistor (TFT), a metal oxide semiconductor (MOS), or other switching devices with the same characteristics. In this disclosure, thin film transistors are used as examples for description. In an exemplary embodiment, the pixel driving circuit may include a 2T1C, 3T1C, 4T1C, 5T1C, 5T2C, 6T1C, 7T1C, 7T2C, 8T1C, etc. structure, where T represents a thin film transistor and C represents a storage capacitor.

[0121] In the pixel driving circuit provided in the embodiment of the present disclosure, each transistor may be an N-type transistor. It should be noted that the embodiment of the present disclosure includes but is not limited to this. For example, one or more transistors in the pixel driving circuit provided in the embodiment of the present disclosure may also be a P-type transistor. It is only necessary to connect the respective poles of the P-type transistor accordingly with reference to the respective poles of the corresponding N-type transistor in the embodiment of the present disclosure, and apply a corresponding high level or low level to the corresponding gate.

[0122] In an exemplary embodiment, a display substrate includes a plurality of signal lines and a plurality of scan lines coupled to a plurality of pixel driving circuits. Exemplarily, the plurality of signal lines include a first signal line D and a power line VDD. For example, the pixel driving circuit for the sub-pixels in the nth column (representing any column) is coupled to the first signal line D(n) and the power line VDD. The first signal line D(n) is configured to provide a data signal to the pixel driving circuit for the sub-pixels in the nth column, and the power line VDD is configured to provide a power supply voltage signal to the pixel driving circuit.

[0123] In an exemplary embodiment, the plurality of scan lines include a first scan line G1 and a second scan line G2. For example, the pixel driving circuit in the m-1th row is connected to the first scan line G1. <m-1>Coupling, first scan line G1 <m-1>It is configured to provide a first scanning signal to the pixel driving circuit of the m-1th row to control the writing of the data signal in the pixel driving circuit. The pixel driving circuit is configured to receive the data signal transmitted by the first signal line D under the control of the first scanning line G1 and output the corresponding current to the light-emitting device. The brackets in Figure 2 represent the row number corresponding to each scanning line, such as: G1 <m-1>Represents the first scan line of row m-1, G2 <m-1>Represents the second scan line in the m-1th row.

[0124] FIG3 is a schematic diagram of an equivalent circuit of a pixel driving circuit provided by an embodiment of the present disclosure. As shown in FIG3 , in an exemplary embodiment, the pixel driving circuit includes a storage capacitor and a plurality of transistors, wherein the plurality of transistors includes a first transistor T1 and a second transistor T2;

[0125] In an exemplary embodiment, the display substrate 10 further includes a plurality of signal lines and a plurality of scan lines coupled to the pixel driving circuit, the plurality of signal lines including a first signal line D and a second signal line Vref; the plurality of scan lines including a first scan line G1 and a second scan line G2, the first scan line G1 and the second scan line G2 both extending along a first direction and arranged sequentially along a second direction, the first direction being an extension direction of sub-pixel rows, the second direction being an extension direction of sub-pixel columns, and the first direction intersecting the second direction.

[0126] The gate of the first transistor T1 is coupled to the first scan line G1, the first electrode of the first transistor T1 is coupled to the first signal line D, and the second electrode of the first transistor T1 is coupled to the first node N1. When an on-level scan signal is applied to the first scan line G1, the first transistor T1 is configured to input the data voltage signal provided by the first signal line D to the first node N1 under the control of the signal provided by the first scan line G1.

[0127] The gate of the second transistor T2 is coupled to the second scan line G2, the first electrode of the second transistor T2 is coupled to the second signal line Vref, and the second electrode of the second transistor T2 is coupled to the first node N1. When an on-level scan signal is applied to the second scan line G2, the second transistor T2 is configured to input a reference voltage signal provided by the second signal line Vref to the first node N1 under the control of the second scan line G2.

[0128] In a pixel driving circuit provided by an embodiment of the present disclosure, the multiple transistors further include a third transistor T3, a fourth transistor T4, a fifth transistor T5 and a driving transistor DT; the multiple scan lines further include a third scan line G3, a light-emitting scan line EM and a fourth scan line G4; the multiple signal lines further include a power line VDD and a third signal line Vinit.

[0129] Among them, the gate of the third transistor T3 is coupled to the third scan line G3, the first electrode of the third transistor T3 is coupled to the first node N1, and the second electrode of the third transistor T3 is coupled to the second node N2; when the on-level scan signal is applied to the third scan line G3, the third transistor T3 is configured to input the voltage of the first node N1 to the second node N2 under the control of the third scan line G3.

[0130] The gate of the fourth transistor T4 is coupled to the light-emitting scan line EM, the first electrode of the fourth transistor T4 is coupled to the power line VDD, and the second electrode of the fourth transistor T4 is coupled to the first electrode of the driving transistor DT; when the conduction level signal is applied to the light-emitting scan line EM, the fourth transistor T4 is configured to input the voltage signal provided by the power line to the first electrode of the driving transistor DT under the control of the light-emitting scan line EM.

[0131] The gate of the driving transistor DT is coupled to the second node N2, that is, coupled to the second electrode of the third transistor T3. The first electrode of the driving transistor DT is coupled to the second electrode of the fourth transistor T4. The second electrode of the driving transistor DT is coupled to the first electrode of the light-emitting device. The driving transistor DT determines a driving current value based on the potential difference between its gate and the first electrode, and applies the generated driving current to the light-emitting device to drive the light-emitting device to emit light.

[0132] The gate of the fifth transistor T5 is coupled to the fourth scan line G4, the first electrode of the fifth transistor T5 is coupled to the first electrode of the light-emitting device, and the second electrode of the fifth transistor T5 is coupled to the third signal line Vinit; when the on-level signal is applied to the fourth scan line G4, the fifth transistor T5 is configured to transmit the voltage signal provided by the third signal line Vinit to the first electrode of the light-emitting device, thereby resetting the first electrode of the light-emitting device.

[0133] The storage capacitor C has a first plate C1 and a second plate C2. The first plate is coupled to the second node N2. That is, the first plate C1 of the storage capacitor C is connected to the gate of the driving transistor T3, and the second plate C2 is coupled to the first electrode of the light emitting device.

[0134] In an exemplary embodiment, the transistors included in the pixel driving circuit may be low-temperature polysilicon thin-film transistors, or may be oxide thin-film transistors, or may be low-temperature polysilicon thin-film transistors and oxide thin-film transistors. The active layer of the low-temperature polysilicon thin-film transistor is made of low-temperature polysilicon (LTPS), and the active layer of the oxide thin-film transistor is made of oxide semiconductor (Oxide). Low-temperature polysilicon thin-film transistors have advantages such as high mobility and fast charging, while oxide thin-film transistors have advantages such as low leakage current. Low-temperature polysilicon thin-film transistors and oxide thin-film transistors are integrated on a display substrate to form a low-temperature polysilicon + oxide (LTPO) display substrate containing both low-temperature polysilicon thin-film transistors and oxide transistors. This can take advantage of the advantages of both, achieve low-frequency driving, reduce power consumption, and improve display quality.

[0135] In an exemplary embodiment, the gate of at least one thin-film transistor has a dual-gate structure. The dual-gate structure can better prevent transistor leakage. As shown in Figure 4, an equivalent circuit diagram is shown when the gates of the first transistor T1, the second transistor T2, and the fifth transistor T5 have a dual-gate structure. Although Figure 4 shows that some thin-film transistors have a dual-gate electrode structure, the present disclosure is not limited to this. The thin-film transistors of the present disclosure may also adopt a single-gate structure, and those skilled in the art can choose according to actual needs.

[0136] Figure 5 is a schematic diagram of the circuit structure of a repeating unit provided in an embodiment of the present disclosure. To improve resolution and simplify processing, in the display substrate structure of the present disclosure, scan lines or signal lines in the pixel drive circuit can be shared between different rows or columns. Exemplarily, at least two rows or columns of sub-pixels share at least one of the scan lines. Exemplarily, at least two sub-pixels in the same row share at least one of the first scan line G1, the second scan line G2, the third scan line G3, and the emission scan line EM.

[0137] As shown in FIG5 , the present disclosure exemplifies a case where sub-pixels in the same row share a first scan line G1, a second scan line G2, and a light-emitting scan line EM. In addition, pixel drive circuits may share not only scan lines but also signal lines. For example, at least two sub-pixels in the same column may be connected to the same first signal line. Sharing lines in a display panel can improve the resolution of the display panel and reduce process difficulty. Although FIG5 shows a case where signal lines and scan lines are shared in a drive circuit, the present disclosure is not limited thereto, and those skilled in the art may make a selection based on actual needs.

[0138] In an exemplary embodiment, both the power line VDD and the third signal line Vinit can be designed in a mesh configuration. The power line VDD includes a first power line VDD-1 extending along a first direction and a second power line VDD-2 extending along a second direction. The first power line VDD-1 and the second power line VDD-2 are coupled to each other, and the first power line VDD-1 is located on the side of the light-emitting scan line EM away from the first scan line G1. The fourth scan line G4 extends along the first direction and is located on the side of the first power line VDD-1 away from the light-emitting scan line EM. The third signal line Vinit includes a first sub-line Vinit-1 extending along the first direction and a second sub-line Vinit-2 extending along the second direction. The first sub-line Vinit-1 is located on the side of the fourth scan line G4 away from the first scan line G1. The mesh distribution structure employed in this disclosure significantly reduces voltage drop during signal transmission and improves image uniformity.

[0139] In an exemplary embodiment, along the second direction, the first branch scan line G3-1 is located on a side of the first scan line G1 away from the second scan line G2; the light-emitting scan line EM is located on a side of the first branch scan line G3-1 away from the first scan line G1.

[0140] In an exemplary embodiment, as shown in Figures 5 and 6, to more clearly illustrate the operation of the pixel driving circuit, the display substrate is divided into multiple control areas (e.g., control areas 1 to X) and multiple third scan lines G3. The multiple control areas correspond one-to-one to the multiple third scan lines G3. Each control area includes at least one repeating unit, each repeating unit includes two sub-units arranged along a first direction, and each sub-unit includes multiple sub-pixels arranged along the first direction. The third scan lines G3 are respectively coupled to the gates of the third transistors T3 included in each repeating unit in the corresponding control area, and are used to control the conduction or cutoff of the third transistors T3 included in each repeating unit in the corresponding control area.

[0141] According to the specific structure of the above-mentioned display substrate, the display substrate provided in the embodiment of the present disclosure includes multiple control areas. Each third scan line G3 can control whether all third transistors T3 in the corresponding control area are turned on, so as to achieve the effect of controlling whether the area achieves a high refresh rate.

[0142] In an exemplary embodiment, within the same control area, the third scan lines G3 are respectively coupled to the control bus lines G30 to form an integrated structure.

[0143] In an exemplary embodiment, the display substrate further includes a driver chip. The control bus G30 and the driver chip are located on the same side of the display substrate. The control bus is coupled to the driver chip, receives a control signal provided by the driver chip, and transmits the received control signal to the third scan line G3 coupled thereto, thereby controlling whether the third transistor T3 in the corresponding control area is turned on.

[0144] In an exemplary embodiment, the first branch scan line G3-1 is arranged along the second direction and extends along the first direction; the second branch scan line G3-2 is arranged along the first direction and extends along the second direction, the second branch scan line G3-2 is respectively coupled to multiple first branch scan lines G3-1, the second branch scan line G3-2 is coupled to the control bus G30, and the first branch scan line G3-1 is respectively coupled to the gate of each write control transistor T3 included in the corresponding repetitive unit.

[0145] In an exemplary embodiment, as shown in FIG. 6 and FIG. 7 , a detailed description is given by taking an example in which a display substrate includes X control areas.

[0146] In the Nth frame display period: the first third scanning line G3 <1> and the Hth third scanning line G3 <h>The control signals transmitted are all at the effective level VGH, and the corresponding first to third scanning lines G3 <1> All third transistors T3 included in the corresponding first control area are turned on, and the Hth third scan line G3 <h>All third transistors T3 included in the corresponding H-th control area are turned on, which can ensure that the first control area and the H-th control area are areas where normal refresh can be achieved. When the display substrate is scanned line by line, high refresh operation can be achieved in the first control area and the H-th control area. The transmitted control signal is a non-effective level VGL, and the corresponding third scanning line G3 When all third transistors T3 included in the corresponding first control area are turned off, the first control area cannot implement a high refresh rate operation during progressive scanning of the display substrate. Consequently, the first control area does not refresh in the Nth frame, and its display image is not updated in the Nth frame. The saved data is provided to the high refresh rate area, achieving a zoned high refresh rate effect. Wherein, H and I are both positive integers greater than 1 and less than or equal to X.

[0147] During the blanking period, the control signal transmitted by the third scanning line G3 is controlled to select a partition for the N+1 frame, wherein the blanking period is located at the beginning or end of each frame display period.

[0148] In the N+1 frame display period: the first third scanning line G3 <1> and the third scanning line G3 The control signals transmitted are all at the effective level VGH, and the corresponding first to third scanning lines G3 <1> All the write control transistors T3 included in the corresponding first control area are turned on, and the first third scan line G3 All the write control transistors T3 included in the corresponding first control area are turned on, which can ensure that the first control area and the first control area are areas where normal refresh can be achieved. When the display substrate is scanned line by line, high refresh operation can be achieved in the first control area and the first control area. <h>The transmitted control signal is a non-effective level VGL, and the corresponding Hth third scanning line G3 <h>All the write control transistors T3 included in the corresponding Hth control area are turned off. When the display substrate is scanned line by line, the Hth control area cannot implement high refresh operation, so that the Hth control area is not refreshed in the Hth frame, and its display screen is not updated in the Hth frame. The saved data is provided to the high refresh area to achieve the effect of partitioned high refresh.

[0149] In an exemplary embodiment, considering that the load of the third scan line G3 is relatively large, the control signal transmitted by the third scan line G3 may be adjusted immediately when the blanking period begins at the end of the Nth frame.

[0150] In the display substrate provided by the embodiment of the present disclosure, by providing the control area and the third scan line G3 , the display substrate can well realize the high refresh rate function of the display substrate.

[0151] In the display substrate provided by the above embodiment, by setting the first branch scan line G3-1 and the second branch scan line G3-2, not only can the transmission of the control signal be better realized, but also the layout difficulty of the third scan line can be reduced, thereby ensuring the reliability of the coupling between the third scan line and the gate of the third transistor T3.

[0152] In an exemplary embodiment, in the same control area, the first branch scan lines located in the same row along the first direction are sequentially connected. Exemplarily, in the same control area, the first branch scan lines located in the same row along the first direction form an integrated structure.

[0153] In an exemplary embodiment, in adjacent control regions, adjacent first branch scan lines along the first direction are disconnected.

[0154] In the display substrate provided by the above embodiment, adjacent first branch scan lines along the first direction are coupled in the same control area, so that the third scan line forms a grid structure in the same control area, which is beneficial to reducing the overall load of the third scan line G3 and reducing the voltage drop of the third scan line G3.

[0155] In an exemplary embodiment, in the same control area, first branch scan lines adjacent to each other along the first direction may also be independently arranged.

[0156] In an exemplary embodiment, the power line VDD includes a first power line VDD-1 extending along a first direction and a second power line VDD-2 extending along a second direction, wherein the first power line VDD-1 and the second power line VDD-2 are coupled to each other. The second power line VDD-2 is arranged alternately with the repeating units along the first direction, and an orthographic projection of the first branch scan line G3-1 on the substrate does not overlap with an orthographic projection of the second power line VDD-2 on the substrate.

[0157] In an exemplary embodiment, as shown in Figures 8 to 26, in a direction perpendicular to the display substrate, the display substrate includes a base substrate 101, and an active layer 103, a first conductive layer 105, a second conductive layer 107, a third conductive layer 109 and a fourth conductive layer 112 arranged in sequence away from the base substrate, wherein the base substrate 101 can be a flexible base substrate or a rigid base substrate.

[0158] Figures 8 to 25 illustrate schematic plan views of the various layers in the display substrate of the present disclosure. Figure 8 shows the active layer 103, which includes the active pattern p for each transistor in the pixel drive circuit. Each transistor's active pattern includes a channel region and a conductive region. The conductive regions of each transistor are located on either side of the channel region, serving as the transistor's first and second electrodes, respectively. Specifically, the active pattern p1 of the first transistor T1 includes a first channel region T1p, a first electrode T11, and a second electrode T12. The active pattern p2 of the second transistor T2 includes a second channel region T2p, a first electrode T21, and a second electrode T22. The active pattern p3 of the third transistor T3 includes a third channel region T3p, a first electrode T31, and a second electrode T32. The active pattern p4 of the fourth transistor T4 includes a fourth channel region T4p, a first electrode T41, and a second electrode T42. The active pattern p5 of the fifth transistor T5 includes a fifth channel region T5p, a first electrode T51, and a second electrode T52. The active pattern pd of the drive transistor DT includes a channel region DTp, a first electrode DT1, and a second electrode DT2. The second electrode T12 of the first transistor T1, the second electrode T22 of the second transistor, and the first electrode T31 of the third transistor T3 are shared, and the location where the three are connected together serves as a first node N1. The location where the second electrode T32 of the third transistor T3 is connected to the drive transistor serves as a second node N2. The first electrode DT1 of the driving transistor DT also serves as the second electrode T42 of the fourth transistor. The second electrode DT2 of the driving transistor DT also serves as the first electrode T51 of the fifth transistor. Other components, such as the first electrode T11 of the first transistor, the first electrode T21 of the second transistor, the first electrode T41 of the fourth transistor, and the first electrode T22 of the fifth transistor, are all separately provided.

[0159] Please continue to refer to Figure 8, in which the active pattern p1 of the first transistor T1, the active pattern p2 of the second transistor T2, and the active pattern p3 of the third transistor T3 in the m-th row of pixels are an integrated structure, located on the side of the driving transistor active pattern pd of the m-th row of pixel driving circuit close to the m-1-th row of pixel driving circuit, and the active pattern p4 of the fourth transistor T4 and the active pattern p5 of the fifth transistor T5 are located on the side of the driving transistor active pattern pd in the m-th row of pixel driving circuit close to the m+1-th row of pixel driving circuit.

[0160] In example embodiments, the active layer may be formed of one or more of amorphous silicon, polysilicon, and oxide semiconductor materials.

[0161] As shown in FIG9 , the first conductive layer 105 may be referred to as a first gate metal layer, including gates of each transistor, a second branch scanning line G3 - 2 , and a second sub-line vinit- 2 .

[0162] In an exemplary embodiment, the first plate of the storage capacitor includes a first sub-plate C1 and a second sub-plate C12 , wherein the first sub-plate is located in the first conductive layer.

[0163] As shown in FIG. 10 , there is a second conductive layer 107 , which may be referred to as a second gate metal layer. In an exemplary embodiment, the second plate C2 of the storage capacitor is located in the second conductive layer.

[0164] As shown in Figure 11, it is a schematic diagram of the stacked structure of the active layer 103, the first conductive layer 105 and the second conductive layer 107. The overlapping area of ​​the first conductive layer 105 and the active layer 103 projected on the base substrate 101 can be used as the gate of each transistor, specifically, including the gate T1g of the first transistor, the gate T2g of the second transistor, the gate T3g of the third transistor, the gate T4g of the fourth transistor, the gate T5g of the fifth transistor, and the gate DTg of the driving transistor DT.

[0165] In an exemplary embodiment, referring to FIG. 11 and FIG. 26 , the present disclosure discloses a process for preparing a display substrate, which may include: preparing a buffer layer 102 on a base substrate 101, depositing an active layer 103 formed of a semiconductor material on a side of the buffer layer 102 facing away from the base substrate 101, and patterning the active layer 103 to form an active pattern p of each transistor; depositing a gate insulating layer 104 on the active layer 103, and then depositing a first conductive layer 105 on the gate insulating layer 104, and patterning the first conductive layer 105 to form a second branch scan line G3-2. , the second sub-line vinit-2, the first sub-plate C11 of the storage capacitor C and the gates of each transistor; part of the structure of the active layer 103 is conductorized, and the area blocked by the first conductive layer 105 forms the channel region of each transistor of the pixel driving circuit, and the active layer 103 that is not blocked is conductorized, that is, the conductive area of ​​the active pattern of each transistor; then a first insulating layer 106 is deposited on the first conductive layer 105, and then a second conductive layer 107 is deposited on the first insulating layer 106, and the second conductive layer 107 is patterned to form the second plate C2 of the storage capacitor.

[0166] As shown in FIG12 , an interlayer insulating layer 108 is disposed on the side of the second conductive layer 107 (Gate 2) away from the substrate, i.e., between the second conductive layer and the third conductive layer. A first via structure V100 is formed on the interlayer insulating layer 108, penetrating the interlayer insulating layer 108. The first via structure V100 is used to connect the upper and lower structures of the interlayer insulating layer 108. The first via structure V100 includes a plurality of vias.

[0167] As shown in FIG13 , the third conductive layer 109 (SD1) includes a first scan line G1, a second scan line G2, a first branch scan line G3-1, an emission scan line EM, a fourth scan line G4, a second signal line Vref, a first power line VDD-1, a first sub-line Vinit-1, and a second sub-plate C12 of a storage capacitor. The first scan line G1, the second scan line G2, the first branch scan line G3-1, the emission scan line EM, the fourth scan line G4, the second signal line Vref, the first power line VDD-1, and the first sub-line Vinit-1 all extend along the first direction and are arranged along the second direction. Exemplarily, in the m-1th row of sub-pixels, the first scan line G1 and the second scan line G2 are adjacently arranged, with the first scan line G1 located on the side of the second scan line G2 closest to the mth row of sub-pixels. The first branch scan line G3-1 is located on the side of the first scan line G1 away from the second scan line G2, wherein the first branch scan line G3-1 includes a first connection portion K1. In the mth row (or any row) of sub-pixels, the first connection portion K1 is located on the side of the first branch scan line G3-1 closer to the first scan line G1. The second signal line Vref is adjacently arranged with the second scan line G2 and located on the side of the second scan line G2 away from the first scan line G1. The first power line VDD-1 is adjacently arranged with the light-emitting scan line EM, wherein the first power line VDD-1 is located on the side of the light-emitting scan line EM away from the first scan line G1. The fourth scan line G4 is located on the side of the first power line VDD-1 away from the light-emitting scan line EM. The first sub-line vinit-1 is located on the side of the fourth scan line G4 away from the first scan line G1. The distance between the second signal line Vref and the second scan line G2 is greater than or equal to the distance between the first scan line G1 and the second scan line G2.

[0168] In an exemplary embodiment, the third conductive layer includes a second connecting portion K2, which is integral with the second sub-plate. The third conductive layer also includes a third connecting portion K3, which is located to the left of the second connecting portion when viewed from above within the same row of sub-pixels.

[0169] In an exemplary embodiment, the first power line VDD- 1 includes a fourth connection portion K4 , and in the same row of sub-pixels, the fourth connection portion is located on a side of the first power line VDD- 1 close to the fourth scan line G4 .

[0170] In an exemplary embodiment, the third conductive layer includes a fifth connection portion K5 and a sixth connection portion K6. In the same row of sub-pixels, the second connection portion K2, the third connection portion K3, the fifth connection portion K5 and the sixth connection portion K6 are all located between the first branch scan line G3-1 and the light-emitting scan line EM.

[0171] In the exemplary embodiment provided by the present disclosure, each connection portion, including the first connection portion K1 , the second connection portion K2 , the third connection portion K3 , the fourth connection portion K4 , the fifth connection portion K5 and the sixth connection portion K6 , is used for electrical connection of each conductive layer structure.

[0172] As shown in Figure 14, a schematic diagram of the stacked structure of the active layer 103, the first conductive layer 105, the second conductive layer 107, and the third conductive layer 109 is shown. Specifically, please refer to Figures 8 to 14 and 26, in which the first scan line G1 is coupled to the gate T1g of the first transistor through the first via structure, exemplarily through the first via V1. The second scan line G2 is coupled to the gate T2g of the second transistor T2 through the first via structure, exemplarily through the second via V2. The first branch scan line G3-1 is coupled to the gate T3g of the third transistor through the first via structure, exemplarily through the third via V3. The light-emitting scan line EM is coupled to the gate T4g of the fourth transistor T4 through the first via structure, exemplarily through the fourth via V4. The fourth scan line G4 is coupled to the gate T5g of the fifth transistor through the first via structure, exemplarily through the fifth via V5. The second signal line Vref is coupled to the first electrode T21 of the second transistor through the first via structure, exemplarily through the sixth via V6. The first power line VDD-1 is coupled to the first electrode T41 of the fourth transistor through the first via structure, exemplarily through the seventh via V7. The first sub-line Vinit-1 is coupled to the first electrode T51 of the fifth transistor through the first via structure, exemplarily through the eighth via V8.

[0173] 8 and 14 , in the same row of sub-pixels, the first channel region T1p is located on a side of the first scan line G1 away from the second scan line G2 , and the second channel region T2p is located on a side of the second scan line G2 away from the first scan line G1 .

[0174] In an exemplary embodiment, the orthographic projection of the gate T1g of the first transistor T1 on the substrate at least partially overlaps with the orthographic projection of the first scan line G1 on the substrate, forming a first overlapping region A1. The orthographic projection of the first via V1 on the substrate is located in the first overlapping region A1. The orthographic projection of the gate T2g of the second transistor on the substrate at least partially overlaps with the orthographic projection of the second scan line G2 on the substrate, forming a second overlapping region A2. The orthographic projection of the second via V2 on the substrate is located in the second overlapping region A2. The distance between the first via V1 and the second via V2 is greater than the distance between the first scan line G1 and the second scan line G2. In sub-pixels in the same row, the fifth channel region T5p is located on the side of the fourth scan line G4 closest to the second scan line G2. The channel region of the driving transistor can be in an "X" shape, including an opening structure T. In the nth column of sub-pixels, the opening structure faces the sub-pixels in the (n-1)th column.

[0175] Please continue to refer to Figures 8 to 14. The second branch scan line G3-2 is coupled to the first branch scan line G3-1 through the first via structure, exemplarily through the ninth via V9, wherein the orthographic projection of the ninth via V9 on the base substrate is located within the orthographic projection of the first connection portion K1 on the base substrate.

[0176] In an exemplary embodiment, the third connection portion K3 is coupled to the first electrode T11 of the first transistor T1 through a first via structure, exemplarily through a twelfth via V12. The fifth connection portion K5 is coupled to the second electrode C2 of the storage capacitor through a first via structure, exemplarily through a tenth via V10, and is coupled to the second electrode of the driving transistor through an eleventh via V11. Exemplarily, the tenth via V10 and the eleventh via V1 are arranged along a first direction and do not overlap in a direction perpendicular to the substrate.

[0177] The sixth connection portion K6 is coupled to the second plate C2 of the storage capacitor through the first via structure, exemplarily through the thirteenth via V13; at the same time, it is coupled to the first electrode of the fifth transistor through the fourteenth via V14. The second sub-plate C12 is coupled to the first sub-plate C11 of the storage capacitor and the second node N2 through the first via structure, exemplarily through the fifteenth via V15 and the sixteenth via V16, respectively. Within the same column of sub-pixels, the fifteenth via V1 and the sixteenth via V16 are arranged along the second direction; the thirteenth via V13 and the fourteenth via V14 are arranged along the second direction. Exemplarily, the orthographic projection of the sixth connection portion K6 on the base substrate covers the orthographic projections of the thirteenth via V13 and the fourteenth via V14 on the base substrate.

[0178] The first sub-wire Vinit- 1 is coupled to the second sub-wire Vinit- 2 through the first via structure, illustratively, through the seventeenth via V17 .

[0179] In the display substrate provided by the embodiment of the present disclosure, multiple vias can be used to improve electrical connection performance and reduce connection resistance. Those skilled in the art can select the number of vias used when connecting different conductive layers according to actual needs.

[0180] As shown in FIG15 , a first organic layer 110 is provided on a side of the third conductive layer 109 away from the base substrate 101, and a second via structure V200 is formed through the first organic layer 110. The upper and lower structures of the first organic layer 110 are connected by the second via structure V200, which includes multiple vias.

[0181] In an exemplary embodiment, as shown in Figures 16 and 26, a first passivation layer 111 may also be provided on the side of the first organic layer 110 away from the base substrate 101. The first passivation layer 111 includes a third via structure V300 that penetrates the first passivation layer PVX1. The third via structure V300 is provided corresponding to the second via structure V200 and is used for electrical connection between the upper and lower structures of the first organic layer 110 and the first passivation layer 111.

[0182] As shown in FIG. 17 , the fourth conductive layer 112 includes a plurality of first signal lines D extending along the second direction, a second power line VDD- 2 , and a seventh connection portion K7 .

[0183] In an exemplary embodiment, the fourth conductive layer 11 further includes an auxiliary electrode Aux. The auxiliary electrode Aux includes an eighth connection portion K8. The eighth connection portion K8 is located to the left of the auxiliary electrode line Aux when viewed from above. The auxiliary electrode Aux is disposed adjacent to the second branch scan line G3-2 along the first direction when viewed from above.

[0184] Figure 18 shows a schematic diagram of the stacked structure of the active layer 103, the first conductive layer 105, the second conductive layer 107, the third conductive layer 109, and the fourth conductive layer 112. Subpixels in the same column share a common first signal line D, which is coupled to the third connection portion K3 through a second via structure, illustratively, the eighteenth via V18, thereby achieving coupling with the first electrode of the corresponding first transistor T1. The orthographic projection of the third connection portion on the substrate plate overlaps the orthographic projections of the twelfth and eighteenth vias on the substrate.

[0185] In an exemplary embodiment, the orthographic projection of the auxiliary electrode Aux on the base substrate overlaps with the orthographic projection of the first branch scan line G3-1 on the base substrate. The seventh connection portion K7 is coupled to the seventh connection portion K5 through a second via structure, exemplarily through the nineteenth via V19, thereby achieving coupling with the second plate C2 of the storage capacitor and the second electrode of the driving transistor. The orthographic projection of the seventh connection portion K7 on the base substrate overlaps the orthographic projection of the nineteenth via V19 on the base substrate. Exemplarily, from a top view, in the same row of sub-pixels, the nineteenth via V19 is located on the side of the tenth via V10 close to the first scan line G1.

[0186] In an exemplary embodiment, the orthographic projection of the fifth connection portion K5 on the base substrate covers the orthographic projection of the seventh connection portion K7 on the base substrate. The fifth connection portion covers the orthographic projections of the tenth via hole, the eleventh via hole, and the nineteenth via hole on the base substrate.

[0187] In an exemplary embodiment, the second power line VDD-2 is connected to the first power line VDD-1 through a second via structure, exemplarily, through a twentieth via V20. The orthographic projection of the twentieth via V20 on the substrate partially overlaps the orthographic projection of the fourth connecting portion K4 on the substrate. Exemplarily, the width of the twentieth via V20 along the first direction is less than the width along the second direction.

[0188] In an exemplary embodiment, a second organic layer 114 is provided on a side of the fourth conductive layer 112 away from the base substrate, and a fourth via structure V400 is formed through the second organic layer 114. The fourth via structure V400 is used to connect the upper and lower structures of the second organic layer 114. The fourth via structure V400 includes a plurality of vias.

[0189] In an exemplary embodiment, a second passivation layer 113 may be further disposed between the second organic layer 114 and the fourth conductive layer 112. The second passivation layer 113 includes a fifth via structure V500, which includes a plurality of vias. Figures 19 and 20 are schematic diagrams of the via structures corresponding to the second passivation layer 113 and the second organic layer 114, respectively. The fifth via structure V500 is disposed correspondingly to the fourth via structure V400.

[0190] The display substrate provided in the embodiment of the present disclosure includes a first passivation layer and a second passivation layer. In other embodiments, the passivation layer may not be included, or only one of the passivation layers may be included. For example, when the display substrate includes the first passivation layer 111, since there is a first organic layer and a first passivation layer between the third conductive layer 109 and the fourth conductive layer 112, the third conductive layer 109 and the fourth conductive layer 112 are far apart. This can effectively reduce the parasitic capacitance between the conductive lines formed by the fourth conductive layer 112 and the conductive lines formed by the third conductive layer 109, thereby meeting the load requirements of medium and large-sized display products and providing support for high refresh rates. Similarly, the second passivation layer 113 and the second organic layer 114 are arranged in the same way.

[0191] As shown in Figures 21 to 26, the display substrate provided in the embodiments of the present disclosure includes a light-emitting device layer 30. The light-emitting device layer 30 is located on the side of the second organic layer 114 facing away from the base substrate 101 and includes a stacked first electrode layer 115, a pixel defining layer 120, a light-emitting functional layer 116, and a second electrode layer 117. The first electrode layer includes a plurality of first electrodes corresponding one-to-one to the plurality of sub-pixels. These first electrodes are coupled to the underlying conductive layer via a via structure extending through the second organic layer 114 and the second passivation layer 113. Exemplarily, the first electrodes are coupled to the seventh connection portion 7 located in the fourth conductive layer 112 via a twenty-first via V21, thereby coupling to the second plate C2 of the storage capacitor and the second electrode of the drive transistor. The first electrode layer 115 also includes a ninth connection portion K9, which extends through the fourth via structure, exemplarily, via a twenty-second via V22, to couple to the auxiliary electrode Aux. The orthographic projection of the ninth connection portion K9 on the base substrate overlaps the orthographic projection of the eighth connection portion K8 on the base substrate. For example, the orthographic projection of the eighth connection portion K8 on the substrate can be located in the middle of the orthographic projection of the ninth connection portion K9 on the substrate. The light-emitting functional layer 116 is connected to the first electrode 115, and the second electrode 117 is connected to the light-emitting functional layer 115. The light-emitting functional layer 116 emits light of a corresponding color when driven by the first electrode 115 and the second electrode 117.

[0192] In an exemplary embodiment, in the same row of sub-pixels, the nineteenth via hole V19 and the twenty-first via hole V21 are arranged along the first direction.

[0193] In an exemplary embodiment, the light-emitting functional layer 116 may include a stacked hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), an emitting layer (EML), a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL). Exemplarily, the hole injection layer and the electron injection layer of all sub-pixels may be a common layer connected together, the hole transport layer and the electron transport layer of all sub-pixels may be a common layer connected together, the hole blocking layer of all sub-pixels may be a common layer connected together, and the light-emitting layers and electron blocking layers of adjacent sub-pixels may have a small amount of overlap or may be isolated.

[0194] In an exemplary embodiment, referring to Figures 23 to 26 , the pixel definition layer 120 includes a first pixel definition layer 118 and a second pixel definition layer 119 . The first pixel definition layer 118 extends along a first direction and is arranged along a second direction. The second pixel definition layer 119 is arranged along the first direction and extends along the first direction. The first pixel definition layer 118 and the second pixel definition layer 119 define an opening region for each sub-pixel, and the light-emitting region of each sub-pixel is located within the opening region. The first pixel definition layer 118 is located between the base substrate and the second pixel definition layer 119. Exemplarily, in a direction perpendicular to the base substrate, the height of the second pixel definition layer 119 is greater than the height of the first pixel definition layer 118.

[0195] During the manufacturing process, an inkjet printing process can be used to drip luminescent ink into the openings to form an organic film layer within the luminescent layer. Because the height of the second pixel definition layer 119 is greater than that of the first pixel definition layer 118, the ink can flow within a row of openings arranged along the second direction during the inkjet printing process, enhancing ink fluidity and averaging the ink content within each opening, thereby improving the uniformity of ink film formation. Furthermore, because the openings within the same row arranged along the second direction are interconnected, the inkjet printing process can form sub-pixel units with the same color within the same row.

[0196] In an exemplary embodiment, a plurality of sub-pixels are divided into a plurality of repeating units distributed in an array, each repeating unit includes two sub-units arranged along a first direction, and each sub-unit includes a plurality of sub-pixels arranged along the first direction. For example, the repeating unit includes six sub-pixels arranged along the first direction, and the six sub-pixels include BRGBRG arranged along the first direction, where a group of BRG represents one sub-unit.

[0197] In an exemplary embodiment, within the plurality of repeating units, the first pixel definition layer includes a first pattern H1, and the second pixel definition layer includes a second pattern H2, wherein an orthographic projection of the second pattern H2 on the base substrate covers an orthographic projection of the first pattern H1 on the base substrate.

[0198] Based on the above configuration, referring to FIG. 23 , in an exemplary embodiment, along the first direction, the first pixel definition layer 118 corresponding to each sub-unit BRG includes a first definition structure 1181, a second definition structure 1182, and a third definition structure 1183 corresponding to each sub-pixel in the sub-unit. Within a repeating unit, the pixel definition structures between adjacent sub-pixels in two adjacent sub-units are integrated. For example, a repeating unit includes six sub-pixels BRGBRG, where BRG represents a sub-unit. Within the sub-unit, B corresponds to the first definition structure, R corresponds to the second definition structure, and G corresponds to the third definition structure. The third definition structures and the first definition structures corresponding to adjacent sub-pixels GB in adjacent sub-units may be connected as an integrated structure. Within at least one repeating unit, the third definition structures corresponding to adjacent sub-units include a first groove L1, and the first definition structures include a second groove L2. From a top view, the first groove L1 and the second groove L2 are oriented in opposite directions and have similar profiles. The first groove L1 and the second groove L2 form a first pattern H1. The orthographic projection of the first pattern H1 on the substrate overlaps the orthographic projection of the ninth connecting portion K9 on the substrate.

[0199] Based on the above configuration, referring to FIG. 24 , in an exemplary embodiment, within at least one repeating unit, the second pixel definition layer 119 corresponding to adjacent subunits includes a second pattern H2. The second pattern H2 includes a first protrusion T1 facing the first subunit and a second protrusion T2 facing the second subunit. The first protrusion T1 and the first recess L1 have similar profiles, while the second protrusion T2 and the second recess L2 have similar profiles. The orthographic projection of the second pattern H2 on the substrate overlaps the orthographic projection of the first pattern H1 on the substrate. Exemplarily, the overlapping region can be located in the center of the second pattern H2. The second pattern also includes a twenty-third via V23. Exemplarily, the twenty-third via V23 can be located at the center of the second pattern H2. That is, within the same repeating unit, along the first direction, the distance from the twenty-third via V23 to the first protrusion T1 and the distance from the second protrusion T2 are equal. This design ensures more uniform ink flow on both sides of the second pattern during ink printing.

[0200] In an exemplary embodiment, the second electrode layer can be connected to the ninth connection portion K9 via the twenty-third via V23, thereby achieving overlap with the auxiliary electrode Aux. From a top view, the orthographic projection of the twenty-third via V23 on the substrate overlaps the orthographic projection of the twenty-second via V22 on the substrate. To account for process variations, the equality mentioned in this disclosure allows for a certain margin of error.

[0201] The present disclosure also provides a display device comprising the display substrate provided in the above embodiments. The display device can be any product or component with a display function, such as a television, monitor, digital photo frame, mobile phone, tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board, and a backplane.

[0202] It should be noted that in the embodiments of the present disclosure, "the same layer" may refer to film layers on the same structural layer. Alternatively, for example, the film layers on the same layer may be formed using the same film-forming process to form a specific pattern, and then patterned using the same mask through a single patterning process to form the layer structure. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the resulting layer structure may be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

[0203] It should be noted that the various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, the method embodiments are described briefly because they are generally similar to the product embodiments. For relevant parts, refer to the description of the product embodiments.

[0204] Although the embodiments disclosed in this disclosure are as described above, the contents described are merely embodiments adopted to facilitate understanding of the disclosure and are not intended to limit the present invention. Any person skilled in the art may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope of the disclosure. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.< / h> < / h> < / h> < / h>

Claims

1. A display substrate, comprising: substrate substrate; A driving circuit layer, comprising pixel units distributed in an array, at least one of the pixel units comprising a plurality of sub-pixels, wherein at least one of the sub-pixels comprises a pixel driving circuit, the pixel driving circuit comprises a light-emitting device, a plurality of transistors and a storage capacitor; the plurality of transistors comprises a first transistor and a second transistor, the first transistor and the second transistor are coupled; a plurality of scan lines, the plurality of scan lines comprising a first scan line and a second scan line, the first scan line and the second scan line both extending along a first direction and arranged in sequence along a second direction, the first direction being an extending direction of the sub-pixel row, and the second direction being an extending direction of the sub-pixel column; Wherein, the multiple transistors include active patterns, the active pattern of each of the transistors includes a channel region and a conductive region, wherein the active pattern of the first transistor includes a first channel region, the active pattern of the second transistor includes a second channel region, the first channel region is located on a side of the first scan line away from the second scan line, and the second channel region is located on a side of the second scan line away from the first scan line.

2. The display substrate according to claim 1, wherein: The display substrate further comprises a plurality of signal lines; the plurality of signal lines comprises a first signal line and a second signal line; The first signal line is coupled to the first electrode of the first transistor; the second signal line is coupled to the first electrode of the second transistor; the first transistor is configured to transmit the voltage signal of the first signal line to the second electrode of the first transistor under the control of the first scan line signal; The second transistor is configured to transmit the voltage signal of the second signal line to the second electrode of the second transistor under the control of the second scan line signal; The second electrode of the first transistor and the second electrode of the second transistor are coupled to a first node.

3. The display substrate according to claim 2, wherein: The plurality of scan lines further include a third scan line, and the plurality of signal lines further include a power line; The third scan line includes a first branch scan line extending along the first direction and a second branch scan line extending along the second direction, and the first branch scan line and the second branch scan line are coupled; The plurality of transistors further include a third transistor and a driving transistor; The storage capacitor includes a first plate and a second plate; The second electrode of the third transistor, the gate of the driving transistor and the first electrode of the storage capacitor are coupled to a second node, the gate of the third transistor is coupled to the third scan line, and the first electrode of the third transistor is coupled to the first node; the third transistor is configured to transmit the voltage of the first node to the second node under the control of the third scan line signal; In the same row of sub-pixels, the first branch scan line is located on a side of the first scan line away from the second scan line.

4. The display substrate according to claim 3, wherein: The plurality of transistors further include a fourth transistor and a fifth transistor; the plurality of scan lines further include a light-emitting scan line and a fourth scan line; the plurality of signal lines further include a third signal line; The light-emitting scanning line extends along the first direction; The gate of the fourth transistor is coupled to the light-emitting scan line, the first electrode of the fourth transistor is coupled to the power line, and the second electrode of the fourth transistor is coupled to the first electrode of the driving transistor; the fourth transistor is configured to transmit the voltage signal provided by the power line to the second electrode of the driving transistor under the control of the light-emitting scan line signal; The gate of the fifth transistor is coupled to the fourth scan line, the first electrode of the fifth transistor is coupled to the third signal line, and the second electrode of the fifth transistor is coupled to the light-emitting device; the fifth transistor is configured to transmit the voltage signal of the third signal line to the light-emitting device under the control of the fourth scan line signal.

5. The display substrate according to claim 4, wherein: The power line comprises a first power line extending along the first direction and a second power line extending along the second direction, and the first power line and the second power line are coupled to each other; in the same row of sub-pixels, the first power line is located on a side of the light-emitting scan line away from the first scan line; The third signal line includes a first sub-line extending along the first direction and a second sub-line extending along the second direction, and the first sub-line and the second sub-line are coupled; The fourth scan line extends along the first direction, and in the same row of sub-pixels, the fourth scan line is located on a side of the first power line away from the light-emitting scan line; The first sub-line is located at a side of the fourth scan line away from the first scan line.

6. The display substrate according to any one of claims 1 to 5, wherein: The pixel driving circuits of the plurality of sub-pixels form M sub-pixel rows and N sub-pixel columns, where M and N are positive integers greater than or equal to 1; at least two sub-pixels in the same column are coupled to the same first signal line.

7. The display substrate according to claim 6, wherein: The display substrate further comprises a plurality of control regions, wherein the control regions comprise at least one repeating unit; The third scan line is respectively coupled to the gate of the third transistor included in each of the repeating units, and is used to control the conduction or cutoff of the third transistor included in each of the repeating units in the corresponding control area. Along the first direction, in the same control area, the first branch scan lines coupled to the sub-pixels in the repeating unit are coupled; between the control areas, the first branch scan lines are disconnected.

8. The display substrate according to claim 7, wherein: An orthographic projection of the second power line on the base substrate does not overlap with an orthographic projection of the first branch scanning line on the base substrate.

9. The display substrate according to claim 7, wherein: An orthographic projection of the first power line on the base substrate overlaps with an orthographic projection of the second branch scanning line on the base substrate.

10. The display substrate according to any one of claims 7 to 9, wherein: In a direction perpendicular to the base substrate, the driving circuit layer comprises an active layer, a first conductive layer, a second conductive layer, a third conductive layer and a fourth conductive layer which are sequentially arranged on the base substrate; The active layer includes active patterns of the plurality of transistors, the active patterns including a channel region and a conductive region; The first conductive layer includes gates of the plurality of transistors, a second branch scanning line and a second sub-line; The second conductive layer includes a second plate of the storage capacitor; The third conductive layer includes the first scan line, the second scan line, the first branch scan line, the light-emitting scan line, the fourth scan line, the second signal line, the first power line and the first sub-line; The fourth conductive layer includes the first signal line and the second power line.

11. The display substrate according to claim 10, wherein: A distance between the second signal line and the second scan line is greater than or equal to a distance between the first scan line and the second scan line.

12. The display substrate according to claim 10, wherein: An interlayer insulating layer is provided between the second conductive layer and the third conductive layer, wherein the interlayer insulating layer includes a first via structure, and the first via structure includes a first via and a second via; The orthographic projection of the gate of the first transistor on the substrate at least partially overlaps with the orthographic projection of the first scanning line on the substrate to form a first overlapping region; The orthographic projection of the first via hole on the base substrate is located in the first overlapping area; The orthographic projection of the gate of the second transistor on the base substrate at least partially overlaps with the orthographic projection of the second scan line on the base substrate to form a second overlapping region; the orthographic projection of the second via on the base substrate is located in the second overlapping region; A distance between the first via hole and the second via hole is greater than a distance between the first scan line and the second scan line.

13. The display substrate according to claim 12, wherein: The first branch scan line comprises a first connection portion, and in the same row of sub-pixels, the first connection portion is located at a side of the first branch scan line away from the light-emitting scan line; The first via structure includes a ninth via, the second branch scan line is coupled to the first branch scan line through the ninth via, and the orthographic projection of the ninth via on the base substrate is located within the orthographic projection of the first connection portion on the base substrate.

14. The display substrate according to claim 13, wherein: The first electrode plate of the storage capacitor includes a first sub-electrode plate and a second sub-electrode plate, the first sub-electrode plate is located in the first conductive layer, and the second sub-electrode plate is located in the third conductive layer; the third conductive layer includes a second connecting portion; The first via structure includes a fifteenth via and a sixteenth via, the second sub-plate is coupled to the first sub-plate through the fifteenth via, and the second sub-plate is coupled to the second node through the sixteenth via; The orthographic projections of the fifteenth via hole and the sixteenth via hole on the base substrate are located within the orthographic projection of the second connecting portion on the base substrate.

15. The display substrate according to claim 14, wherein: The third conductive layer includes a first organic layer on a side away from the base substrate, the first organic layer includes a second via structure, the first via structure includes a twelfth via, and the second via structure includes an eighteenth via; The first signal line is coupled to the first electrode of the first transistor through the twelfth via hole and the eighteenth via hole, wherein the orthographic projections of the eighteenth via hole and the twelfth via hole on the substrate have an overlapping area; The third conductive layer further includes a third connecting portion, and an orthographic projection of the third connecting portion on the base substrate covers an orthographic projection of the eighteenth via hole and an orthographic projection of the twelfth via hole on the base substrate.

16. The display substrate according to claim 15, wherein: The second via structure includes a twentieth via, and the second power line is coupled to the first power line through the twentieth via; The first power line comprises a fourth connection portion, and in the same row of sub-pixels, the fourth connection portion is located at a side of the first power line close to the fourth scan line; An orthographic projection of the twentieth via hole on the base substrate partially overlaps with an orthographic projection of the fourth connecting portion on the base substrate.

17. The display substrate according to claim 16, wherein: A width of the twentieth via hole along the first direction is smaller than a width along the second direction.

18. The display substrate according to any one of claims 11 to 17, wherein: It includes a light-emitting device layer, which is located on the side of the fourth conductive layer away from the base substrate; the light-emitting device layer includes a first electrode layer, a pixel defining layer, a light-emitting function layer and a second electrode layer, wherein the first electrode layer includes a plurality of first electrodes corresponding one by one to the plurality of sub-pixels.

19. The display substrate according to claim 18, wherein: The side of the fourth conductive layer away from the base substrate includes a second organic layer, the second organic layer includes a fourth via structure, the fourth via structure includes a twenty-first via, and the multiple first electrodes are coupled to the seventh connecting portion through the twenty-first via, thereby achieving coupling with the second plate of the storage capacitor and the second electrode of the driving transistor.

20. The display substrate according to claim 19, wherein: The fourth conductive layer further includes an auxiliary electrode, and the auxiliary electrode includes an eighth connecting portion. From a top view, the eighth connecting portion is located on the left side of the auxiliary electrode.

21. The display substrate according to claim 20, wherein: The pixel definition layer includes a first pixel definition layer and a second pixel definition layer. The first pixel definition layer is arranged along the first direction and extends along the second direction. The first pixel definition layer and the second pixel definition layer define an opening area of ​​each sub-pixel. The light-emitting area of ​​each sub-pixel is located within the opening area. In a direction perpendicular to the substrate, the height of the second pixel definition layer is greater than the height of the first pixel definition layer.

22. The display substrate according to claim 21, wherein: The multiple sub-pixels are divided into multiple repeating units distributed in an array, each repeating unit includes two sub-units arranged along a first direction, and each sub-unit includes multiple sub-pixels arranged along the first direction; within the repeating unit, the pixel definition structure between adjacent sub-pixels in two adjacent sub-units is an integrated structure.

23. The display substrate according to claim 22, wherein: In the plurality of repeating units, the first pixel definition layer includes a first pattern, the second pixel definition layer includes a second pattern, and an orthographic projection of the second pattern on the base substrate covers an orthographic projection of the first pattern on the base substrate.

24. The display substrate according to claim 23, wherein: The fourth via structure includes a twenty-second via, the second pattern includes a twenty-third via, and the second electrode layer is coupled to the auxiliary electrode through the twenty-third via and the twenty-second via; The orthographic projection of the twenty-third via hole on the base substrate covers the orthographic projection of the twenty-second via hole on the base substrate.

25. The display substrate according to claim 24, wherein: The first electrode layer includes a ninth connection portion, the orthographic projection of the eighth connection portion on the base substrate is located within the orthographic projection of the ninth connection portion on the base substrate; and the orthographic projection of the eighth connection portion on the base substrate covers the twenty-second via hole.

26. The display substrate according to claim 25, wherein: The twenty-third via hole is located at the center of the second pattern.

27. A display device comprising the display substrate according to any one of claims 1 to 26.

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