Touch-control display substrate and touch-control display apparatus

Abstract

A touch-control display substrate and a touch-control display apparatus, which belong to the technical field of display. The touch-control display substrate comprises: a base (101), gate lines (102) and data lines (103) located on the base (101), and a plurality of sub-pixels (104) located in an intersection region of the gate lines (102) and the data lines (103). The data lines (103) comprise: main data lines (1031) and auxiliary data lines (1032), wherein adjacent main data lines (1031) in the same data line (103) are connected by means of the auxiliary data lines (1032); adjacent main data lines (1031) in a first direction are spaced apart by two sub-pixels (104); the adjacent main data lines (1031) in the same data line (103) are located on different straight lines, and main data lines (1031) that are spaced apart from each other are located on the same straight line; and each auxiliary data line (1032) spans at least two adjacent sub-pixels (104). The touch-control display substrate further comprises: touch-control lines (105) located on the base (101). The touch-control lines (105) comprise: main touch-control lines (1051) and auxiliary touch-control lines (1052), wherein the main touch-control lines (1051) extending in the first direction are alternately arranged with the main data lines (1031); and the auxiliary touch-control lines (1052) and the auxiliary data lines (1032) span the same number of sub-pixels (104).

Description

Touch display substrate and touch display device Technical Field

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

[0002] With the continuous advancement of display technology, touch display products with integrated touch functionality are gaining increasing popularity and expanding their application areas. On-Cell / in-Cell touch display products offer unique advantages such as lightweight and thinness, simple manufacturing processes, and excellent touch performance. In-Cell touch display products, in particular, have become a current development focus due to their ability to reduce the thickness of both sides of the LCD panel, resulting in a simple laminate structure and low costs.

[0003] Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provide a touch display substrate and a touch display device.

[0005] In a first aspect, an embodiment of the present disclosure provides a touch display substrate, wherein the touch display substrate comprises: a substrate, gate lines and data lines located on the substrate, and a plurality of sub-pixels located in an intersection area between the gate lines and the data lines;

[0006] Two gate lines are arranged between each two adjacent rows of sub-pixels; the gate lines extend along a first direction; the data lines include: a primary data line and an auxiliary data line; the primary data line extends along a second direction, and the auxiliary data line extends along the first direction, and adjacent primary data lines in the same data line are connected by the auxiliary data line; adjacent main data lines in the first direction are spaced apart by two sub-pixels; the first direction and the second direction intersect; adjacent main data lines in the same data line are located on different straight lines, and the spaced main data lines are located on the same straight line; each auxiliary data line spans at least two adjacent sub-pixels in the first direction;

[0007] The touch display substrate further includes touch lines located on the base; the touch lines include main touch lines and auxiliary touch lines; the main touch lines extend along the second direction, the auxiliary touch lines extend along the first direction, and adjacent main touch lines in the same touch line are connected by the auxiliary touch lines; adjacent main touch lines in the same touch line are located on different straight lines, and the spaced main touch lines are located on the same straight line;

[0008] The main touch lines and the main data lines extending along the first direction are alternately arranged; and the number of the auxiliary touch lines and the auxiliary data lines crossing the sub-pixels along the first direction is the same.

[0009] Optionally, the sub-pixels include: a first sub-pixel, a second sub-pixel and a third sub-pixel; among the two adjacent gate lines on both sides of the sub-pixels in the same row, one of the gate lines connects all the first sub-pixels and half of the third sub-pixels in the same row, and the other gate line connects all the second sub-pixels and the other half of the third sub-pixels in the same row.

[0010] Optionally, the gate line is located on the substrate; the data line and the touch line are arranged in the same layer and are located on a side of the gate line away from the substrate.

[0011] Optionally, orthographic projections of the auxiliary data line and the auxiliary touch line extending along the second direction on the substrate are respectively located on two sides of an orthographic projection of the same gate line on the substrate.

[0012] Optionally, the gate line is located on the substrate; the data line is located on a side of the gate line away from the substrate; and the touch line is located on a side of the data line away from the substrate.

[0013] Optionally, the orthographic projection of the auxiliary data line on the substrate is located between the orthographic projections of two adjacent gate lines on the substrate, and the orthographic projection of the auxiliary touch line on the substrate overlaps with the orthographic projection of one gate line on the substrate.

[0014] Optionally, the sub-pixel includes a thin film transistor; the thin film transistor includes a gate electrode, a semiconductor layer, and a drain electrode sequentially arranged in a direction away from the substrate; the gate electrode is connected to the gate line; the drain electrode is connected to the data line; the drain electrode includes a main portion and a first extension portion located on a side of the main portion close to the gate line;

[0015] The orthographic projection of the main portion on the substrate covers a portion of the orthographic projection of the semiconductor layer on the substrate; the orthographic projection of the first extension portion on the substrate does not overlap with the orthographic projection of the semiconductor layer on the substrate.

[0016] Optionally, the sub-pixel includes: a thin film transistor; the thin film transistor includes: a semiconductor layer, a gate electrode and a drain electrode arranged in sequence along a direction away from the substrate; the gate electrode is connected to the gate line; and the drain electrode is connected to the data line.

[0017] Optionally, the drain electrode further includes: a second extension portion located on a side of the main body away from the gate line;

[0018] An orthographic projection of the second extension portion on the substrate does not overlap with an orthographic projection of the semiconductor layer on the substrate.

[0019] Optionally, the drain electrode further includes: a recessed portion located on a side of the main body close to the data line;

[0020] An orthographic projection of the concave portion on the substrate falls within an orthographic projection of the gate on the substrate.

[0021] Optionally, each of the sub-pixels further includes: a pixel electrode located on a side of the drain away from the substrate; the pixel electrode includes: a plurality of first electrodes arranged side by side; and slits are provided between adjacent first electrodes.

[0022] Optionally, the first electrode includes: a plurality of first sub-electrodes and a plurality of second sub-electrodes connected to each other; the extension directions of the first sub-electrodes and the second sub-electrodes intersect; the connection points of the first sub-electrode and the second sub-electrode of the same first electrode are located on the same straight line; the connection points of the first sub-electrode and the second sub-electrode of the first electrode in the same row are located on the same straight line.

[0023] Optionally, the pixel electrode further includes: a second electrode and a third electrode connected to the first sub-electrode and the second sub-electrode respectively; the thin film transistor further includes: a source electrode provided in the same layer as the drain electrode;

[0024] In some of the sub-pixels, the second electrode is connected to the source electrode; the orthographic projection of the third electrode on the substrate at least partially overlaps with the orthographic projection of the auxiliary touch line on the substrate;

[0025] In some of the sub-pixels, the second electrode is connected to the source electrode; and an orthographic projection of the third electrode on the substrate at least partially overlaps with an orthographic projection of the auxiliary data line on the substrate.

[0026] Optionally, each of the sub-pixels further includes: a common electrode; the common electrode is multiplexed as a touch electrode; and the area where each touch electrode is located is divided into a touch unit;

[0027] In the same touch unit, the common electrodes are interconnected; the common electrodes of two sub-pixels between the adjacent main touch lines along the first direction constitute a repeating unit, and the common electrodes in adjacent repeating units along the first direction or the second direction are interconnected through connecting parts.

[0028] Optionally, the common electrode has a first opening;

[0029] An orthographic projection of the first opening on the substrate at least partially overlaps with an orthographic projection of the auxiliary data line on the substrate.

[0030] Optionally, the common electrode further has a second opening;

[0031] An orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the main touch line on the substrate.

[0032] Optionally, the common electrode further has a third opening;

[0033] An orthographic projection of the third opening on the substrate at least partially overlaps with an orthographic projection of the auxiliary touch line on the substrate.

[0034] Optionally, the common electrode is located on a side of the pixel electrode away from the substrate; the common electrode of each sub-pixel includes: a plurality of fourth electrodes arranged side by side; a slit is provided between adjacent fourth electrodes; and the pixel electrode of each sub-pixel is a planar electrode.

[0035] Optionally, the pixel electrode has two opposite ends in the second direction;

[0036] In some of the sub-pixels, one end of the pixel electrode is connected to the source electrode, and an orthographic projection of the other end on the substrate at least partially overlaps with an orthographic projection of the auxiliary data line on the substrate;

[0037] In some of the sub-pixels, one end of the pixel electrode is connected to the source electrode, and an orthographic projection of the other end of the pixel electrode on the substrate at least partially overlaps with an orthographic projection of the auxiliary touch line on the substrate.

[0038] In a second aspect, an embodiment of the present disclosure provides a touch display device, wherein the touch display device includes the touch display substrate provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic structural diagram of an exemplary touch display substrate.

[0040] FIG2 a is a schematic structural diagram of a touch display substrate provided in an embodiment of the present disclosure.

[0041] FIG. 2 b is a simplified structural diagram of the touch display substrate shown in FIG. 2 a .

[0042] FIG. 3 a is an enlarged schematic diagram of the area within the dotted line frame M of the touch display substrate shown in FIG. 2 a .

[0043] FIG3 b is a schematic diagram of a cross-sectional structure of the structure shown in FIG3 a along the AA′ direction.

[0044] FIG3 c is a schematic diagram of the cross-sectional structure of the structure shown in FIG3 a along the BB′ direction.

[0045] FIG3 d is a schematic cross-sectional view of a feasible wiring structure of the touch display substrate shown in FIG2 a .

[0046] FIG. 4 a is an enlarged schematic diagram of a thin film transistor in a dotted-line frame N region of the touch display substrate shown in FIG. 2 a .

[0047] FIG. 4 b is an enlarged schematic diagram of the thin film transistor in the dotted-line frame N′ region of the touch display substrate shown in FIG. 2 a .

[0048] FIG. 5 is an enlarged schematic diagram of the region within the dotted-line frame P of the touch display substrate shown in FIG. 2 a .

[0049] FIG. 6 is a schematic structural diagram of a common electrode in the touch display substrate shown in FIG. 2 a . DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" 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. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0052] FIG1 is a schematic diagram of the structure of an exemplary touch display substrate. As shown in FIG1 , the touch display substrate includes: a substrate 101, a gate line 102 and a data line 103 located on the substrate 101, and a plurality of sub-pixels 104 located in the intersection area of ​​the gate line 102 and the data line 103; two gate lines 102 are arranged between each two adjacent rows of sub-pixels 104; the gate lines 102 extend along a first direction; a data line 103 is arranged every other column of sub-pixels 104; the data lines 103 include: a main data line; a ... The primary data lines 1031 and the auxiliary data lines 1032 are connected; the primary data lines 1031 extend along the second direction, and the auxiliary data lines 1032 extend along the first direction, with adjacent primary data lines 1031 connected by the auxiliary data lines 1032; the first direction and the second direction intersect, for example, the first direction is the row direction, and the second direction is the column direction; adjacent primary data lines 1031 are located on different straight lines, while alternate data lines 1031 are located on the same straight line; each auxiliary data line 1032 spans at least two adjacent sub-pixels 104. For example, a data line 103 extends leftward along the row direction by the distance of two sub-pixels 104 through an auxiliary data line 1032, then extends downward by the distance of one sub-pixel 104 through a primary data line 1031, and then extends rightward by the distance of two sub-pixels 104 through an auxiliary data line 1032, and the routing repeats in this cycle.

[0053] Continuing with FIG1 , of two adjacent gate lines 102, one gate line 102 connects half of the sub-pixels 104 in the same row, and the other gate line 102 connects the other half of the sub-pixels 104 in the same row. The touch display substrate further includes touch lines 105 located on the base 101; the touch lines 105 extend along the second direction and are located between adjacent primary data lines 1031.

[0054] However, during the display process, current touch display substrates are prone to problems such as sky-blue vertical streaks due to the connection method between the gate lines 102 and each sub-pixel 104. Furthermore, the data lines 103 employ a bow-shaped routing structure consisting of a main data line 1031 and an auxiliary data line 1032, while the touch lines 105 employ a traditional straight routing structure. The auxiliary data lines 1032 extending along the first direction of the data lines 103 overlap with the touch lines 105, which easily generates overlap capacitance. This results in a high load on the data lines 103 and touch lines 105, affecting the energy consumption of the touch display substrate. Furthermore, the data lines 103 and touch lines 105 are manufactured using different mask plates, which increases the number of mask plates and manufacturing costs, failing to meet user requirements for low cost and high performance.

[0055] In order to solve at least one of the above technical problems, the embodiments of the present disclosure provide a touch display substrate and a touch display device. The touch display substrate and the touch display device provided by the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0056] In a first aspect, an embodiment of the present disclosure provides a touch display substrate. FIG2a is a schematic structural diagram of a touch display substrate provided by an embodiment of the present disclosure, and FIG2b is a simplified schematic structural diagram of the touch display substrate shown in FIG2a. As shown in FIG2a and FIG2b, the touch display substrate includes: a substrate 101, a gate line 102 and a data line 103 located on the substrate 101, and a plurality of sub-pixels 104 located in the intersection area of ​​the gate line 102 and the data line 103; two gate lines 102 are arranged between each two adjacent rows of sub-pixels 104; the gate line 102 extends along a first direction; the data line 103 includes: a main data line 1031 and an auxiliary data line 1032; the main data line 1031 extends along a second direction, and the auxiliary data line 1032 extends along the first direction, and adjacent main data lines 1031 in the same data line 103 are connected by the auxiliary data line 1032; the main data lines 1031 adjacent to each other along the first direction are separated by two sub-pixels 104; the first direction and The adjacent main data lines 1031 in the same data line 103 are located on different straight lines, and the alternate main data lines 1031 are located on the same straight line; each auxiliary data line 1032 crosses at least two adjacent sub-pixels 104 along the first direction; the touch display substrate further includes: a touch line 105 located on the substrate 101; the touch line 105 includes: a main touch line 1051 and an auxiliary touch line 1052; the main touch line 1051 extends along the second direction, and the auxiliary touch line 1052 extends along the second direction. The line extends along the first direction 1052, and adjacent main touch lines 1051 in the same touch line 105 are connected by auxiliary touch lines 1052; adjacent main touch lines 1051 in the same touch line 105 are located on different straight lines, and the spaced main touch lines 1051 are located on the same straight line; the main touch lines 1051 extending along the first direction are alternately arranged with the main data lines 1031; the number of auxiliary touch lines 1052 and the number of auxiliary data lines 1032 crossing sub-pixels 104 are the same.

[0057] The substrate 101 can be made of a rigid material such as glass to improve the substrate 101's ability to support other film layers thereon. Alternatively, the substrate 101 can be made of a flexible material such as polyimide (PI) to improve the overall bending and stretching resistance of the display substrate, thereby preventing stress generated during bending, stretching, and twisting from causing the substrate 101 to break and cause a short circuit. In practical applications, the material of the substrate 101 can be appropriately selected based on actual needs to ensure that the display substrate has good performance.

[0058] The gate line 102 and the data line 103 can both be made of a metal material, such as one of molybdenum (Mo), aluminum (Al) and titanium (Ti), or an alloy of the above-mentioned materials. They can be a single-layer structure or a multi-layer structure. In the present embodiment, the gate line 102 and the data line 103 are both single-layer structures. Two gate lines 102 are arranged between each two adjacent rows of sub-pixels 104, and the gate lines 102 can extend along the row direction. The main data lines 1031 adjacent to each other along the first direction are separated by two sub-pixels. For example, the data line 103 is extended to the left along the row direction by an auxiliary data line 1032 by the distance of two sub-pixels 104, and then extended downward by a main data line 1031 by the distance of one sub-pixel 104, and then extended to the right by an auxiliary data line 1032 by the distance of two sub-pixels 104, and the wiring is repeated in this cycle with 2*6 sub-pixels as a repeating unit. Adjacent main data lines 1031 are located on different straight lines, and alternate main data lines 1031 are located on the same straight line. Each auxiliary data line 1032 spans at least two adjacent sub-pixels 104 along the first direction. In this way, the data lines 103 can form a bow-shaped routing structure.

[0059] During the display process, two adjacent data lines 103 can input data signals of different polarities. For example, one data line 103 inputs a positive data signal, while the other data line 103 inputs a negative data signal. Adjacent sub-pixels 104 in the same row can also input data signals of different polarities. Because the data lines 103 utilize a zigzag routing structure, adjacent sub-pixels 104 in the same column also input data signals of different polarities. This spatially averages the voltage polarities of the same sub-pixels 104 within the same frame of image, visually avoiding the appearance of alternating bright and dark stripes, thereby improving the display quality.

[0060] The touch lines 105 can be made of a metal material, such as molybdenum (Mo), aluminum (Al), and titanium (Ti), or alloys thereof. They can be single-layer or multi-layer structures. In the present embodiment, a single-layer touch line 105 is used as an example for description. Adjacent main touch lines 1051 along the first direction are separated by two sub-pixels. For example, a touch line 105 extends leftward along the row direction by the distance of two sub-pixels 104, then extends downward by the distance of one sub-pixel 104 through a main touch line 1051, and then extends rightward by the distance of two sub-pixels 104 through an auxiliary touch line 1052. This routing cycle is repeated, with 2*6 sub-pixels as a unit. Adjacent main touch lines 1051 are located on different straight lines, while alternate main touch lines 1051 are located on the same straight line. Each auxiliary touch line 1052 spans at least two adjacent sub-pixels 104 along the first direction. In this way, the touch line 105 can also form the same bow-shaped routing structure as the data line 103 .

[0061] It should be noted that adjacent main data lines 1031 are two main data lines 1031 in the same data line 103 that are sequentially connected via the same auxiliary data line 1032. Adjacent main touch lines 1051 are two main touch lines 1051 in the same touch line 105 that are sequentially connected via the same auxiliary touch line 1052. Alternate main data lines 1031 are two main data lines 1031 in the same data line 103 that are respectively connected via different auxiliary data lines 1032. Alternate main touch lines 1051 are two main touch lines 1051 in the same touch line 105 that are respectively connected via different auxiliary touch lines 1052. In the embodiment of the present application, since the data line 103 is bent, the alternate main data lines 1031 can be located on the same straight line, meaning that the odd-numbered main data lines 1031 in the same data line 103 all overlap with a first straight line along the second direction, and the even-numbered main data lines 1031 all overlap with a second straight line along the second direction. Similarly, because the touch line 105 is curved, the alternate main touch lines 1051 located on the same straight line can be such that the odd-numbered main touch lines 1051 in the same touch line 105 all overlap with the third straight line along the second direction, and the even-numbered main touch lines 1051 all overlap with the fourth straight line along the second direction. The first straight line and the second straight line do not overlap, and the third straight line and the fourth straight line do not overlap.

[0062] In the touch display substrate provided by the embodiment of the present disclosure, the data line 103 and the touch line 105 both adopt the same bow-shaped routing structure. The orthographic projection of the data line 103 on the substrate 101 does not overlap with the orthographic projection of the touch line 105 on the substrate 101, and each auxiliary touch line 1052 and the auxiliary data line 1032 cross the same number of sub-pixels 104. This can avoid the generation of parasitic capacitance between the data line 103 and the touch line 105, thereby reducing the load on the data line 103 and the touch line 105, and reducing the energy consumption of the touch display substrate, thereby meeting users' needs for low energy consumption and high performance.

[0063] It should be noted that the number of sub-pixels 104 crossed by each auxiliary data line 1032 and auxiliary touch line 1052 can also be 4, 6, etc. The specific line lengths can be set according to actual needs and are not listed here one by one.

[0064] In some embodiments, as shown in Figure 2a, the sub-pixel 104 includes: a first sub-pixel, a second sub-pixel and a third sub-pixel; among the two adjacent gate lines 102 on both sides of the sub-pixels 104 in the same row, one gate line 102 connects all the first sub-pixels and half of the third sub-pixels in the same row, and the other gate line 102 connects all the second sub-pixels and the other half of the third sub-pixels in the same row.

[0065] The first sub-pixel can be specifically a red sub-pixel R, the second sub-pixel can be specifically a green sub-pixel G, and the third sub-pixel can be specifically a blue sub-pixel B. Since the data line 103 adopts a bow-shaped routing structure, the same data line 103 can charge at least four columns of sub-pixels 104, and the multiple gate lines 102 are used to control the individual charging of each sub-pixel 104 in different columns. When the same data line 103 charges multiple columns of sub-pixels 104, some adjacent sub-pixels 104 are prone to being undercharged. In the disclosed embodiment, half of the blue sub-pixels B in the same row are connected to one gate line 102, and the other half of the blue sub-pixels B are connected to another gate line 102. When the blue sub-pixels B and the green sub-pixels G are mixed for display, the undercharged portions and pre-charged portions of the blue sub-pixels B and the green sub-pixels G can offset each other, thereby avoiding the appearance of sky-blue vertical stripes, thereby improving the display effect of the touch display substrate.

[0066] Figure 3a is an enlarged schematic diagram of the dotted frame M area of ​​the touch display substrate shown in Figure 2a, Figure 3b is a schematic diagram of the cross-sectional structure of the structure shown in Figure 3a along the A-A' direction, and Figure 3c is a schematic diagram of the cross-sectional structure of the structure shown in Figure 3a along the BB' direction. As shown in Figures 3a, 3b and 3c, the gate line 102 is located on the substrate 101; the data line 103 and the touch line 105 are arranged in the same layer and are located on the side of the gate line 102 away from the substrate 101.

[0067] Because the data lines 103 and touch lines 105 utilize the same arched routing structure and do not overlap, they can be placed on the same layer. That is, the data lines 103 and touch lines 105 are fabricated using the same material and process, which reduces the number of masks, process steps, and manufacturing costs. Specifically, the orthographic projections of the auxiliary data lines 1032 and auxiliary touch lines 1052 extending along the second direction on the substrate 101 are located on either side of the orthographic projection of the same gate line 102 on the substrate 101.

[0068] For example, as shown in FIG3b , the auxiliary data line 1032 is located between adjacent gate lines 102, and the auxiliary touch line 1052 is arranged on the same layer as the auxiliary data line 1032. A gate insulating layer is provided between the gate line 102 and the auxiliary data line 1032 and the auxiliary touch line 1052. The auxiliary data line 1032 and the auxiliary touch line 1052 are covered with a planarization layer to prevent short circuits between adjacent conductive layers.

[0069] For example, as shown in Figure 3c, the auxiliary touch line 1052 is located between adjacent gate lines 102, the auxiliary data line 1032 and the auxiliary touch line 1052 are arranged on the same layer, a gate insulation layer is provided between the gate line 102 and the auxiliary data line 1032 and the auxiliary touch line 1052, and a planarization layer is covered on the auxiliary data line 1032 and the auxiliary touch line 1052 to prevent short circuits between adjacent conductive layers.

[0070] In actual applications, the distance between the orthographic projections of the auxiliary data line 1032 and the auxiliary touch line 1052 on the substrate 101 and the orthographic projections of the same gate line 102 on the substrate 101 is greater than or equal to 1 micron and less than or equal to 3.5 microns. That is, the spacing between adjacent traces is greater than or equal to 1 micron and less than or equal to 3.5 microns, which can prevent short circuits between two adjacent traces and avoid mutual interference between adjacent traces, thereby affecting the touch display effect. For example, the spacing between the auxiliary data line 1032 and the gate line 102 is 2 microns, and the spacing between the gate line 102 and the auxiliary touch line 1052 is 2 microns. It is understandable that the spacing between two adjacent traces can also be other values, which can be set according to actual needs and are not listed here one by one.

[0071] Figure 3d is a schematic diagram of a cross-sectional structure of a feasible wiring structure of the touch display substrate shown in Figure 2a. As shown in Figure 3d, the gate line 102 is located on the substrate 101; the data line 103 is located on the side of the gate line 102 away from the substrate 101; and the touch line 105 is located on the side of the data line 103 away from the substrate 101.

[0072] The gate line 102 is located on the substrate 101, the data line 103 is located on the side of the gate line 102 away from the substrate 101, and the touch line 105 is located on the side of the data line 103 away from the substrate 101. In this way, the data line 103 and the touch line 105 can be located in different conductive layers. Since there are many insulating layers between the touch line 105 and the gate line 102, it has a good insulation effect. It is not necessary to consider the wiring spacing between the touch line 105 and the gate line 102, so the wiring space can be reduced.

[0073] Specifically, the orthographic projection of the auxiliary data line 1032 on the substrate 101 is located between the orthographic projections of two gate lines 102 on the substrate 101 between two adjacent rows of sub-pixels 104, and the orthographic projection of the auxiliary touch line 1052 on the substrate 101 overlaps with the orthographic projection of one gate line 102 on the substrate 101.

[0074] Since the gate lines 102 , auxiliary data lines 1032 and auxiliary touch lines 1052 are located in different film layers, the auxiliary touch lines 1052 can be overlapped with one of the gate lines 102 to reduce routing space, increase the pixel aperture ratio of the touch display substrate, and improve the display effect.

[0075] The distances between the orthographic projection of the auxiliary data line 1032 on the substrate 101 and the orthographic projections of the two gate lines 102 between two adjacent rows of sub-pixels 104 and the auxiliary touch line 1052 on the substrate 101 are both greater than or equal to 1 micron and less than or equal to 3.5 microns.

[0076] In actual applications, the distance between the orthographic projection of the auxiliary data line 1032 on the substrate 101 and the orthographic projections of the two gate lines 102 between two adjacent rows of sub-pixels 104 and the auxiliary touch line 1052 on the substrate 101 is greater than or equal to 1 micron and less than or equal to 3.5 microns. That is, the spacing between adjacent traces is greater than or equal to 1 micron and less than or equal to 3.5 microns, which can prevent short circuits between two adjacent traces and avoid mutual interference between adjacent traces, which affects the touch display effect. For example, the spacing between the auxiliary data line 1032 and the gate line 102 is 2 microns, and the spacing between the auxiliary data line 1032 and the auxiliary touch line 1052 is 2 microns. It is understandable that the spacing between two adjacent traces can also be other values, which can be set according to actual needs and are not listed here one by one.

[0077] FIG4 a is an enlarged schematic diagram of a thin film transistor in the dotted-line frame N region of the touch display substrate shown in FIG2 a , and FIG4 b is an enlarged schematic diagram of a thin film transistor in the dotted-line frame N′ region of the touch display substrate shown in FIG2 a . As shown in FIG4 a and FIG4 b , the sub-pixel 104 includes: a thin film transistor; the thin film transistor includes: a gate electrode 1041, a semiconductor layer 1042, and a drain electrode 1043 arranged in sequence along a direction away from the substrate 101; the gate electrode 1041 is connected to the gate line 102; the drain electrode 1043 is connected to the data line 102; the drain electrode 1043 includes: a main body portion 1043 a and a first extension portion 1043 b located on a side of the main body portion 1043 a close to the gate line 102; the orthographic projection of the main body portion 1043 a on the substrate 101 covers a portion of the orthographic projection of the semiconductor layer 1042 on the substrate 101; the orthographic projection of the first extension portion 1043 b on the substrate 101 does not overlap with the orthographic projection of the semiconductor layer 1042 on the substrate 101.

[0078] The gate electrode 1041 of the thin film transistor can be connected to the gate line 102. The gate line 102 can transmit a scanning signal to the gate electrode 1041, and the scanning signal can turn on the semiconductor layer 1042. The drain electrode 1043 can be connected to the data line 103. The data line 103 can transmit a data signal to the drain electrode 1043. The drain electrode 1043 is also connected to one end of the semiconductor layer 1042 to transmit the data signal through the semiconductor layer 1042. The material of the semiconductor layer 1042 can specifically be a metal oxide, such as indium gallium zinc oxide (IGZO).

[0079] The main body 1043a of the drain 1043 can cover a portion of the semiconductor layer 1042, the main body 1043a can overlap with one end of the semiconductor layer 1042, and the first extension portion 1043b is connected to the main body 1043a. For example, the first extension portion 1043b and the main body 1043a can be formed as one piece, and the first extension portion 1043b does not overlap with the orthographic projection of the semiconductor layer 1042 on the substrate 101. The boundary where the main body 1043a and the first extension portion 1043b are connected is flush with the edge of the semiconductor layer 1042. During the fabrication of the touch display substrate, the drain electrode 1043 can easily shift due to alignment requirements. However, when the drain electrode 1043 shifts away from the gate line 102, the portion of the drain electrode 1043 on the side of the first extension 1043b that extends beyond the semiconductor layer 1042 still covers the semiconductor layer 1042, ensuring uniformity in the on-state current of the semiconductor layer 1042, the channel width of the thin-film transistors, and between different thin-film transistors, thereby improving the display quality of the touch display substrate. Specifically, the width of the first extension 1043b along the first direction (row direction) is greater than or equal to 2 microns and less than or equal to 10 microns; the width of the first extension 1043b along the second direction (column direction) is greater than or equal to 1.5 microns and less than or equal to 10 microns.

[0080] It is understood that the thin film transistor described above is a bottom-gate thin film transistor, although it can also be a top-gate thin film transistor. For example, the thin film transistor includes: a semiconductor layer 1042, a gate electrode 1041, and a drain electrode 1043 arranged in sequence along a direction away from the substrate 101; the gate electrode 1041 is connected to the gate line 102; and the drain electrode 1043 is connected to the data line 102. The material of the semiconductor layer 1042 can specifically be low-temperature polysilicon (LTPS). Its implementation principle is similar to that of the above-mentioned bottom-gate thin film transistor and will not be described in detail here.

[0081] In some embodiments, as shown in Figures 4a and 4b, the drain 1043 further includes: a second extension portion 1043c located on the side of the main body 1043a away from the gate line 102; the second extension portion 1043c is connected to the main body 1043a, for example, the second extension portion 1043c and the main body 1043a can be formed as one piece, and the orthographic projection of the second extension portion 1043c on the substrate 101 does not overlap with the orthographic projection of the semiconductor layer 1042 on the substrate 101.

[0082] The boundary connecting the main portion 1043a and the second extension 1043c is flush with the edge of the semiconductor layer 1042. During the fabrication of the touch display substrate, the drain electrode 1043 is prone to shifting due to alignment requirements. However, when the drain electrode 1043 shifts toward the gate line 102, the portion of the drain electrode 1043 on the side of the second extension 1043c that extends beyond the semiconductor layer 1042 still covers the semiconductor layer 1042, ensuring uniformity in the on-state current of the semiconductor layer 1042, the channel width of the thin-film transistors, and between different thin-film transistors, thereby improving the display quality of the touch display substrate. Specifically, the width of the second extension 1043c along the first direction (row direction) is greater than or equal to 2 microns and less than or equal to 10 microns; the width of the second extension 1043c along the second direction (column direction) is greater than or equal to 1.5 microns and less than or equal to 10 microns.

[0083] In some embodiments, as shown in Figures 4a and 4b, the drain 1043 further includes: a recessed portion 1043d located on the side of the main portion 1043a close to the data line 103; the orthographic projection of the recessed portion 1043d on the substrate 101 falls within the orthographic projection of the gate 1041 on the substrate 101.

[0084] The sides of the main portion 1043a of the drain electrode 1043 are straight lines, and the second extension portion 1043c is connected to the main portion 1043a. In the first direction, the width of the second extension portion 1043c is greater than the width of the main portion 1043a. The edges of the main portion 1043a, the second extension portion 1043c, and the auxiliary data line 1032 can be combined to form a recessed portion 1043d (as shown in FIG4a ), or the edges of the main portion 1043a, the second extension portion 1043c, and the primary data line 1031 can be combined to form a recessed portion (as shown in FIG4b ). The recessed portion 1043d exposes the gate 1041, effectively reducing the overlap area between the drain electrode 1043 and the gate 1041, and reducing the parasitic capacitance between the drain electrode 1043 and the gate 1041. This reduces the load on the entire touch display substrate, thereby improving the charging rate of the thin film transistor and reducing the power consumption of the touch display substrate. Specifically, the width of the concave portion 1043d along the first direction (row direction) is greater than or equal to 2 microns and less than or equal to 10 microns; the width of the concave portion 1043d along the second direction (column direction) is greater than or equal to 2 microns and less than or equal to 10 microns.

[0085] In some embodiments, as shown in FIG. 2 a , each sub-pixel 104 further includes a pixel electrode 106 located on the side of the drain 1043 facing away from the substrate 101 ; the pixel electrode 106 includes a plurality of first electrodes 1061 arranged side by side; and slits are provided between adjacent first electrodes 1061 .

[0086] The pixel electrode 106 is composed of a plurality of first electrodes 1061 arranged side by side, with slits provided between adjacent first electrodes 1061. The electric field generated by the slit electrodes in the plane and the electric field generated between the surface electrodes form a multi-dimensional electric field, causing the liquid crystal molecules to rotate, thereby improving the working efficiency of the liquid crystal molecules and increasing the light transmittance efficiency.

[0087] In some embodiments, as shown in Figure 2a, the first electrode 1061 includes: a plurality of first sub-electrodes 1061a and a plurality of second sub-electrodes 1061b connected to each other; the extension directions of the first sub-electrodes 1061a and the second sub-electrodes 1061b intersect; in some embodiments, the connection points of the first sub-electrode 1061a and the second sub-electrode 1061b of the same first electrode 1061 are all located on the same straight line; in some embodiments, the connection points of the first sub-electrode 1061a and the second sub-electrode 1061b of the first electrode 1061 in the same row are all located on the same straight line.

[0088] In the same pixel electrode 106, the first sub-electrode 1061a and the second sub-electrode 1061b extend along different lines, achieving a multi-domain state for the liquid crystal. The connection points of the first sub-electrode 1061a and the second sub-electrode 1061b of the same first electrode 1061 are located on the same line. Furthermore, the connection points of the first sub-electrode 1061a and the second sub-electrode 1061b of the first electrodes 1061 in the same row are all located on the same line. This facilitates a compact arrangement of the electrodes, ensuring consistent deflection directions for the liquid crystal molecules, thereby improving the display quality of the touch display substrate. The first sub-electrodes 1061a and the second sub-electrode 1061b are alternately arranged in each column of sub-pixels 104 (the sub-pixels 104 in each column have the same structure). Each row of pixels 104 can be divided into an upper half and a lower half using the straight line where the connection point of the first sub-electrode 1061a and the second sub-electrode 1061b is located as the dividing line. The number of first sub-electrodes 1061a and the number of second sub-electrodes 1061b in the upper half of each row of sub-pixels 104 are the same.

[0089] In some embodiments, as shown in Figure 2a, the pixel electrode 106 also includes: a second electrode 1062 and a third electrode 1063 respectively connected to the first sub-electrode 1061a and the second sub-electrode 1061b; the thin film transistor also includes: a source electrode 1044 arranged in the same layer as the drain electrode 1043. In the same pixel electrode 106, the third electrode 1063 is farther away from the source electrode 1044 than the second electrode 1062.

[0090] Figure 5 is an enlarged schematic diagram of the dashed-line frame P region of the touch display substrate shown in Figure 2a. As shown in Figure 5, in some sub-pixels 104, the second electrode 1062 is connected to the source electrode 1044; the orthographic projection of the third electrode 1063 on the substrate 101 at least partially overlaps with the orthographic projection of the auxiliary data line 1032 on the substrate 101. In some embodiments, in some sub-pixels 104, the second electrode 1062 is connected to the source electrode 1044; and the orthographic projection of the third electrode 1063 on the substrate 101 at least partially overlaps with the orthographic projection of the auxiliary touch line 1052 on the substrate 101.

[0091] In some sub-pixels 104, the second electrode 1062 can be positioned slightly above the entire sub-pixel 104. The second electrode 1062 is connected to the source electrode 1044 and the first sub-electrode 1061a. This allows the first sub-electrode 1061a to be closer to the source electrode 1044 and be shorter than the second sub-electrode 1061b. This prevents the thin-film transistor from blocking the second electrode 1062, thereby increasing the aperture ratio of the sub-pixel 104. Furthermore, the edge of the corresponding third electrode 1063 can extend beyond the edge of the auxiliary data line 1032 or the auxiliary touch line 1052. Because the auxiliary data line 1032, the auxiliary touch line 1052, and the second electrode 1062 all have a certain light-shielding effect, the third electrode 1063 can overlap with the auxiliary data line 1032 or the auxiliary touch line 1052 to increase the aperture ratio of the sub-pixel 104, thereby improving the light transmittance of the entire touch display substrate and saving power consumption of the touch display substrate. In some sub-pixels 104, the second electrode 1062 can be set at a position slightly lower than the entire sub-pixel 104. The implementation principle is the same as that of the second electrode 1062 in some sub-pixels 104 being set at a position slightly higher than the entire sub-pixel 104, and will not be described in detail here.

[0092] Figure 6 is a schematic diagram of the common electrode structure in the touch display substrate shown in Figure 2a. As shown in Figure 6, each sub-pixel 104 further includes a common electrode 107; the common electrode 107 is multiplexed as a touch electrode; the area where each touch electrode is located is divided into a touch unit; within the same touch unit, the common electrodes 107 are interconnected; the common electrodes 107 of two sub-pixels 104 between adjacent main touch lines 1051 along the first direction form a repeating unit 108. The common electrodes in adjacent repeating units 108 along the first direction or the second direction are interconnected via a connecting portion 1071.

[0093] The common electrode 107 can be located on the side of the pixel electrode 106 near the substrate 101. Two sub-pixels 104 are disposed between adjacent primary touch lines 1051 along the first direction. The common electrodes 107 of the two sub-pixels 104 are connected together and can be integrally formed, i.e., formed using the same material and the same manufacturing process. The common electrodes 107 of the two sub-pixels 104 disposed between adjacent primary touch lines 1051 along the first direction form a repeating unit 108. Within the same touch unit, each repeating unit 108 is connected together by a connecting portion 1071. Adjacent repeating units in either the first or second direction are interconnected by the connecting portion 1071. Adjacent repeating units 108 are disconnected from each other between adjacent touch units, thereby forming a plurality of touch units arranged in an array.

[0094] The common electrode 107 of each sub-pixel 104 is formed using a planar electrode. A common signal is input to form an electric field between the common electrode 107 and the pixel electrode 106, driving the liquid crystal molecules to deflect and achieve display functionality. The touch display substrate is further divided into multiple touch cells, each of which is provided with a touch electrode. The common electrode 107 of each sub-pixel 104 can be formed using a single patterning process during the manufacturing process, reducing process steps and saving manufacturing costs. In some embodiments, the common electrode 107 and the connecting portion 1071 of each sub-pixel 104 can be formed using a single patterning process during the manufacturing process.

[0095] In some embodiments, the common electrode 107 may be located on a side of the pixel electrode 106 facing away from the substrate 101 .

[0096] As shown in Figure 6, the common electrode 107 has a first opening 107a; the orthographic projection of the first opening 107a on the substrate 101 at least partially overlaps with the orthographic projection of the auxiliary data line 1032 on the substrate 101, and the orthographic projection of the first opening 107a on the substrate 101 intersects with the orthographic projection of the auxiliary touch line 1052 on the substrate 101, and the two ends of the first opening 107a are connecting portions 1071 of adjacent repeating units 108 along the second direction.

[0097] The first opening 107a partially exposes the auxiliary data line 1032, effectively reducing the overlap area between the common electrode 107 and the auxiliary data line 1032, thereby reducing the parasitic capacitance between the common electrode 107 and the auxiliary data line 1032. This reduces the load on the entire touch display substrate, thereby improving the charging rate of the thin film transistor and reducing the power consumption of the touch display substrate. The width of the first opening 107a can be 3 to 10 μm, and the length can be determined based on the size of each sub-pixel 104, typically 6 to 50 μm.

[0098] As shown in Figure 6, the common electrode 107 also has a second opening 107b; the orthographic projection of the second opening 107b on the substrate 101 at least partially overlaps with the orthographic projection of the main touch line 1051 on the substrate 101, and the two ends of the second opening 107b are connecting portions 1071 of adjacent repeating units 108 along the first direction. In some embodiments, the orthographic projection of the second opening 107b on the substrate 101 and the orthographic projection of the main touch line 1051 on the substrate 101 have a second overlapping area, and the length of the second overlapping area along the second direction is equal to the length of the main touch line 1051 within the second overlapping area.

[0099] The second opening 107b can expose part of the main touch line 1051, which can effectively reduce the overlapping area between the common electrode 107 and the main touch line 1051, and reduce the parasitic capacitance between the common electrode 107 and the main touch line 1051. This can reduce the load of the entire touch display substrate, which is beneficial to improving the charging rate of the thin film transistor and reducing the power consumption of the touch display substrate.

[0100] As shown in Figure 6, the common electrode 107 also has a third opening 107c; ​​the orthographic projection of the third opening 107c on the substrate 101 at least partially overlaps with the orthographic projection of the auxiliary touch line 1052 on the substrate 101, and the two ends of the third opening 107c are connecting portions 1071 of adjacent repeating units 108 along the second direction. In some embodiments, the orthographic projection of the third opening 107c on the substrate 101 and the orthographic projection of the auxiliary touch line 1052 on the substrate 101 have a third overlapping area, and the length of the third overlapping area along the first direction is equal to the length of the auxiliary touch line 1052 in the second overlapping area.

[0101] The third opening 107c can expose part of the auxiliary touch line 1052, which can effectively reduce the overlapping area between the common electrode 107 and the auxiliary touch line 1052, and reduce the parasitic capacitance between the common electrode 107 and the auxiliary touch line 1052. This can reduce the load of the entire touch display substrate, which is beneficial to improving the charging rate of the thin film transistor and reducing the power consumption of the touch display substrate.

[0102] It should be noted here that since the common electrode 107 is located on the side of the pixel electrode 106 close to the substrate 101, when the pixel electrode 106 is connected to the source 1044 in the thin film transistor through a via, the via needs to pass through the common electrode 107. Therefore, an avoidance opening 107d is also required in the common electrode 107 to avoid a short circuit between the common electrode 107 and the pixel electrode 106, which would affect the touch display effect.

[0103] In some embodiments, the common electrode 107 is located on the side of the pixel electrode 106 away from the substrate 101; the common electrode 107 of each sub-pixel 104 includes: multiple fourth electrodes (not shown in the figure) arranged side by side; slits are provided between adjacent fourth electrodes; the pixel electrode 106 of each sub-pixel 104 is a planar electrode.

[0104] The common electrode 107 can be located on the side of the pixel electrode 106 facing away from the substrate 101. The arrangement of the common electrode 107 and the pixel electrode 106 is opposite to that in FIG2a , that is, the pixel electrode 106 is a planar electrode and the common electrode 107 is a slit electrode. The implementation is the same as that in FIG2a above and will not be described in detail here.

[0105] In some embodiments, the pixel electrode 106 has two opposite ends in the second direction; in some sub-pixels 104, one end of the pixel electrode 106 is connected to the source 1044, and the orthographic projection of the other end on the substrate 101 at least partially overlaps with the orthographic projection of the auxiliary data line 1032 on the substrate 101; in some sub-pixels 104, one end of the pixel electrode 106 is connected to the source 1044, and the orthographic projection of the other end on the substrate 101 at least partially overlaps with the orthographic projection of the auxiliary touch line 1052 on the substrate 101.

[0106] In some sub-pixels 104, one end of the pixel electrode 106 can be positioned slightly above the entire sub-pixel 104, and one end of the pixel electrode 106 can be connected to the source electrode 1044. This prevents the thin-film transistor from blocking one end of the pixel electrode 106, thereby increasing the aperture ratio of the sub-pixel 104. At the same time, the edge of the other end of the corresponding pixel electrode 106 can extend beyond the edge of the auxiliary data line 1032 or the auxiliary touch line 1052. Because the auxiliary data line 1032, the auxiliary touch line 1052, and the other end of the pixel electrode 106 all have a certain light-shielding effect, one end of the pixel electrode 106 can overlap with the auxiliary data line 1032 or the auxiliary touch line 1052 to increase the aperture ratio of the sub-pixel 104, thereby improving the light transmittance of the entire touch display substrate and saving power consumption of the touch display substrate. In some sub-pixels 104, one end of the pixel electrode 106 can be set at a position slightly lower than the entire sub-pixel 104. The implementation principle is the same as that of setting one end of the pixel electrode 106 in some sub-pixels 104 at a position slightly higher than the entire sub-pixel 104, and will not be described in detail here.

[0107] In a second aspect, embodiments of the present disclosure provide a touch display device comprising a touch display substrate as provided in any of the aforementioned embodiments. The touch display device can be any product or component with a touch display function, such as a television, mobile phone, monitor, laptop computer, digital photo frame, or navigation system. The implementation principles of the touch display device are similar to those of the aforementioned touch display substrates and will not be further elaborated here.

[0108] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A touch display substrate, wherein: The touch display substrate comprises: a substrate, a gate line and a data line located on the substrate, and a plurality of sub-pixels located in the intersection area of ​​the gate line and the data line; Two gate lines are arranged between each two adjacent rows of sub-pixels; the gate lines extend along the first direction; the data lines include: a main data line and an auxiliary data line; the main data line extends along the second direction, the auxiliary data line extends along the first direction, and the adjacent main data lines in the same data line are connected by the auxiliary data line; the adjacent main data lines in the first direction are spaced apart by two sub-pixels; the first direction and the second direction intersect; the adjacent main data lines in the same data line are located on different straight lines, and the spaced main data lines are located on the same straight line; each auxiliary data line spans at least two adjacent sub-pixels in the first direction; The touch display substrate further includes: touch lines located on the substrate; the touch lines include: main touch lines and auxiliary touch lines; the main touch lines extend along the second direction, the auxiliary touch lines extend along the first direction, and the adjacent main touch lines in the same touch line are connected by the auxiliary touch lines; the adjacent main touch lines in the same touch line are located on different straight lines, and the spaced main touch lines are located on the same straight line; The main touch lines and the main data lines extending along the first direction are alternately arranged; and the number of sub-pixels crossed by the auxiliary touch lines and the auxiliary data lines along the first direction is the same.

2. The touch display substrate according to claim 1, wherein: The sub-pixels include: a first sub-pixel, a second sub-pixel and a third sub-pixel; among the two adjacent gate lines on both sides of the sub-pixels in the same row, one of the gate lines connects all the first sub-pixels and half of the third sub-pixels in the same row, and the other gate line connects all the second sub-pixels and the other half of the third sub-pixels in the same row.

3. The touch display substrate according to claim 1, wherein: The gate line is located on the substrate; the data line and the touch line are arranged in the same layer and are located on a side of the gate line away from the substrate.

4. The touch display substrate according to claim 3, wherein: The orthographic projections of the auxiliary data line and the auxiliary touch line extending along the second direction on the substrate are respectively located at two sides of the orthographic projection of the same gate line on the substrate.

5. The touch display substrate according to claim 1, wherein: The gate line is located on the substrate; the data line is located on a side of the gate line away from the substrate; and the touch line is located on a side of the data line away from the substrate.

6. The touch display substrate according to claim 5, wherein: The orthographic projection of the auxiliary data line on the substrate is located between the orthographic projections of two adjacent gate lines on the substrate, and the orthographic projection of the auxiliary touch line on the substrate overlaps with the orthographic projection of one gate line on the substrate.

7. The touch display substrate according to claim 1, wherein: The sub-pixel comprises: a thin film transistor; the thin film transistor comprises: a gate electrode, a semiconductor layer and a drain electrode arranged in sequence along a direction away from the substrate; the gate electrode is connected to the gate line; the drain electrode is connected to the data line; the drain electrode comprises: a main body and a first extension portion located on a side of the main body close to the gate line; The orthographic projection of the main body on the substrate covers a part of the orthographic projection of the semiconductor layer on the substrate; the orthographic projection of the first extension portion on the substrate has no overlap with the orthographic projection of the semiconductor layer on the substrate.

8. The touch display substrate according to claim 1, wherein: The sub-pixel comprises: a thin film transistor; the thin film transistor comprises: a semiconductor layer, a gate electrode and a drain electrode arranged in sequence along a direction away from the substrate; the gate electrode is connected to the gate line; and the drain electrode is connected to the data line.

9. The touch display substrate according to claim 7, wherein: The drain electrode further comprises: a second extension portion located at a side of the main body away from the gate line; An orthographic projection of the second extension portion on the substrate does not overlap with an orthographic projection of the semiconductor layer on the substrate.

10. The touch display substrate according to claim 9, wherein: The drain electrode further includes: a concave portion located on a side of the main body portion close to the data line; The orthographic projection of the concave portion on the substrate falls on the orthographic projection of the gate on the substrate. In the movie.

11. The touch display substrate according to claim 7 or 8, wherein: Each of the sub-pixels further comprises: a pixel electrode located at a side of the drain electrode away from the substrate; the pixel electrode comprises: a plurality of first electrodes arranged side by side; and slits are arranged between adjacent first electrodes.

12. The touch display substrate according to claim 11, wherein: The first electrode includes: a plurality of first sub-electrodes and a plurality of second sub-electrodes connected to each other; the extension directions of the first sub-electrodes and the second sub-electrodes intersect; the connection points of the first sub-electrode and the second sub-electrode of the same first electrode are located on the same straight line; the connection points of the first sub-electrode and the second sub-electrode of the first electrode in the same row are located on the same straight line.

13. The touch display substrate according to claim 12, wherein: The pixel electrode further includes: a second electrode and a third electrode connected to the first sub-electrode and the second sub-electrode respectively; the thin film transistor further includes: a source electrode arranged in the same layer as the drain electrode; In some of the sub-pixels, the second electrode is connected to the source electrode; the orthographic projection of the third electrode on the substrate at least partially overlaps with the orthographic projection of the auxiliary touch line on the substrate; In some of the sub-pixels, the second electrode is connected to the source electrode; and an orthographic projection of the third electrode on the substrate at least partially overlaps with an orthographic projection of the auxiliary data line on the substrate.

14. The touch display substrate according to claim 7 or 8, wherein: Each of the sub-pixels further comprises: a common electrode; the common electrode is reused as a touch electrode; and the area where each touch electrode is located is divided into a touch unit; In the same touch unit, the common electrodes are interconnected; the common electrodes of two sub-pixels between the main touch lines adjacent in the first direction form a repeating unit, and the common electrodes in adjacent repeating units are interconnected through connecting parts along the first direction or the second direction.

15. The touch display substrate according to claim 14, wherein: The common electrode has a first opening; The orthographic projection of the first opening on the substrate is parallel to the orthographic projection of the auxiliary data line on the substrate. The orthographic projections at least partially overlap.

16. The touch display substrate according to claim 14, wherein: The common electrode also has a second opening; An orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the main touch line on the substrate.

17. The touch display substrate according to claim 14, wherein: The common electrode also has a third opening; An orthographic projection of the third opening on the substrate at least partially overlaps with an orthographic projection of the auxiliary touch line on the substrate.

18. The touch display substrate according to claim 14, wherein: The common electrode is located on the side of the pixel electrode away from the substrate; the common electrode of each sub-pixel includes: a plurality of fourth electrodes arranged side by side; slits are arranged between adjacent fourth electrodes; and the pixel electrode of each sub-pixel is a planar electrode.

19. The touch display substrate according to claim 18, wherein: The pixel electrode has two opposite ends in the second direction; In some of the sub-pixels, one end of the pixel electrode is connected to the source electrode, and the orthographic projection of the other end on the substrate at least partially overlaps with the orthographic projection of the auxiliary data line on the substrate; In some of the sub-pixels, one end of the pixel electrode is connected to the source electrode, and the orthographic projection of the other end on the substrate at least partially overlaps with the orthographic projection of the auxiliary touch line on the substrate.

20. A touch display device, wherein: The touch display device comprises the touch display substrate according to any one of claims 1 to 19.

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