Touch display substrate and preparation method, touch display device

Abstract

The present disclosure provides a touch display substrate, a preparation method, and a touch display device, belonging to the field of touch display technology. The touch display substrate of the present disclosure includes: a substrate; a touch electrode, arranged on the substrate; the touch electrode includes: a plurality of touch signal lines extending along a preset direction; the plurality of touch signal lines form a grid structure; a display signal line, arranged on the substrate, the display signal line being electrically connected to a display pixel and used to provide a display signal to the display pixel; a second signal line, arranged on the substrate, the second signal line being electrically connected to a constant potential end; the second signal line being located between a layer where the touch signal line is located and a layer where the display signal line is located; an orthographic projection of the second signal line on the substrate at least partially overlaps with an orthographic projection of at least part of the touch signal line on the substrate; and / or an orthographic projection of the second signal line on the substrate at least partially overlaps with an orthographic projection of at least part of the display signal line on the substrate.

Description

Technical Field

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

[0002] With the development of portable electronic display devices, touch panels have provided a new human-computer interaction interface that is more direct and user-friendly. Integrating a touch panel with a flat-panel touch display device to form a touch display device provides touch functionality, allowing input via fingers, stylus, etc., making operation more intuitive and simple.

[0003] Currently, the most commonly used touch technologies include resistive and capacitive touch panels. However, users often choose capacitive touch panels as their preferred choice for controllability, ease of use, and surface appearance. Capacitive touch screens are widely used in various electronic interactive devices due to their high durability, long lifespan, and support for multi-touch functionality.

[0004] Currently, touch display devices generally use touch electrodes with a metal mesh structure, so that the touch electrodes have good conductive properties and high transmittance.

[0005] Public content

[0006] The present disclosure at least partially solves the problem of crosstalk between touch and display functions in existing touch display devices, and provides a touch display substrate with better product performance.

[0007] In one aspect, an embodiment of the present disclosure provides a touch display substrate, wherein the touch display substrate includes:

[0008] substrate;

[0009] A touch electrode is provided on the substrate; the touch electrode comprises: a plurality of touch signal lines extending along a preset direction; the plurality of touch signal lines form a grid structure;

[0010] A display signal line is provided on the substrate, and is used to provide a display signal to a display pixel;

[0011] a second signal line, disposed on the substrate, the second signal line being electrically connected to the constant potential terminal; the second signal line being located between the layer where the touch signal line is located and the layer where the display signal line is located;

[0012] The orthographic projection of the second signal line on the substrate at least partially overlaps with the orthographic projection of at least part of the touch signal line on the substrate;

[0013] And / or, an orthographic projection of the second signal line on the substrate at least partially overlaps with an orthographic projection of at least part of the display signal line on the substrate.

[0014] In some embodiments, the orthographic projections of some of the touch signal lines on the substrate and the projections of some of the display signal lines on the substrate have at least a partially overlapping area;

[0015] An orthographic projection of the second signal line on the substrate covers an overlapping area.

[0016] In some embodiments, the orthographic projections of a portion of the touch signal lines on the substrate and the orthographic projections of a portion of the display signal lines on the substrate are completely covered by the other.

[0017] The orthographic projection of the second signal line on the substrate covers the orthographic projection of the portion of the display signal line on the substrate.

[0018] In some embodiments, a difference between a width of the display signal line and a width of the touch signal line is smaller than a preset value.

[0019] In some embodiments, the width of the display signal line is equal to the width of the touch signal line.

[0020] In some embodiments, the touch electrodes include: a plurality of first touch signal lines extending along a column direction, and a plurality of second touch signal lines extending along a row direction; the row direction intersects the column direction;

[0021] The plurality of first touch signal lines and the plurality of second touch signal lines define the grid structure.

[0022] In some embodiments, the display signal lines include: first display signal lines extending along a column direction;

[0023] The orthographic projection of the first display signal line on the substrate at least partially overlaps with the orthographic projection of part of the first touch signal line on the substrate;

[0024] A portion of the orthographic projection of the second signal line on the substrate covers the orthographic projection of the first display signal line on the electrical substrate.

[0025] In some embodiments, the display signal line further includes: a second display signal line extending along the row direction;

[0026] The orthographic projection of the second display signal line on the substrate overlaps with the orthographic projection of a portion of the second touch control line on the substrate;

[0027] A portion of the orthographic projection of the second signal line on the substrate covers the orthographic projection of the second display signal line on the electrical substrate.

[0028] On the other hand, an embodiment of the present disclosure provides a touch display substrate, comprising:

[0029] substrate;

[0030] A touch electrode is provided on the substrate; the touch electrode comprises: a plurality of second touch signal lines extending along a row direction, and a plurality of first touch signal lines extending along a column direction; the row direction intersects the column direction;

[0031] a first display signal line, disposed on the substrate and extending along the column direction;

[0032] A floating signal line is provided on the substrate and extends along the row direction; the floating signal line is insulated from the touch electrode and the display signal line;

[0033] The orthographic projection of the floating signal line on the substrate overlaps with the orthographic projection of the first display signal line on the substrate and falls within the orthographic projection range of the touch electrode on the substrate.

[0034] In some embodiments, the orthographic projection of the first touch signal line on the substrate does not overlap with the orthographic projection of the display signal line on the substrate, a portion of the orthographic projection of the second touch signal line on the substrate is located between the orthographic projections of two adjacent display signal lines on the substrate, and the portion of the second touch signal line connects the first touch signal line located between the two adjacent display signal lines; the orthographic projection of the portion of the second touch signal line on the substrate intersects with the orthographic projection of the display signal line on the substrate, and connects the first touch signal lines located on both sides of the display signal line.

[0035] In some embodiments, the floating signal line is located between two adjacent first touch signal lines and extends along the row direction; the orthographic projection of the floating signal line on the substrate intersects with the orthographic projection of the first display signal line of the two adjacent first touch signal lines on the substrate.

[0036] In some embodiments, at least a portion of the floating signal lines are collinearly disposed with the second touch signal lines.

[0037] In some embodiments, the floating signal line extends along the column direction; and an orthographic projection of the floating signal line on the substrate falls within an orthographic projection of the display signal line on the substrate.

[0038] In some embodiments, the floating signal line, the first touch signal line, and the second touch signal line are formed of the same material and are disposed in the same layer.

[0039] In some embodiments, the touch electrode includes: a first touch electrode and a second touch electrode;

[0040] The first touch electrode includes:

[0041] a first sub-portion extending along a row direction;

[0042] A plurality of first finger-shaped portions extend from the first sub-portion along the column direction away from the first sub-portion, and the plurality of first finger-shaped portions are located on one side of the first sub-portion;

[0043] A plurality of second finger-shaped portions extend from the first sub-portion along the column direction away from the first sub-portion, and the plurality of second finger-shaped portions are located on the other side of the first sub-portion;

[0044] The second touch electrode includes a first touch sub-electrode and a second touch sub-electrode;

[0045] The first touch sub-electrode includes: a second sub-portion extending along the row direction, the second sub-portion being located on one side of the first sub-portion; and a plurality of third finger-shaped portions extending from the second sub-portion along the column direction toward the first sub-portion;

[0046] The second touch sub-electrode includes: a third sub-portion extending along the row direction, the third sub-portion being located on the other side of the first sub-portion; and a plurality of fourth finger-shaped portions extending from the third sub-portion along the column direction toward the first sub-portion.

[0047] The plurality of first finger-shaped portions and the plurality of third finger-shaped portions are alternately arranged in a row direction, and the plurality of second finger-shaped portions and the plurality of fourth finger-shaped portions are alternately arranged in a row direction.

[0048] In some embodiments, the touch display substrate further includes: a bridging portion extending along the column direction and configured to electrically connect the first touch sub-portion and the second touch sub-portion;

[0049] The bridge portion is located in the first electrode layer, the first touch electrode and the second touch electrode are located in the second electrode layer, and the first electrode layer and the second electrode layer are sequentially arranged away from the substrate.

[0050] In some embodiments, the touch display substrate further includes:

[0051] Display pixels are disposed on the substrate; and

[0052] The encapsulation layer is arranged on a side of the display pixel away from the substrate and is configured to cover the display pixel.

[0053] The first electrode layer and the second electrode layer are sequentially arranged away from the packaging layer.

[0054] In some embodiments, the first touch electrode and the second touch electrode constitute a touch unit, and the touch display substrate includes a plurality of touch units arranged in an array. In two touch units adjacent along the row direction, the first sub-portions of the first touch electrodes of the two touch units are electrically connected to each other; in two touch units adjacent along the column direction, the second sub-portion of the first touch sub-electrode of the second touch electrode of one touch unit is electrically connected to the third sub-portion of the second touch sub-electrode of the second touch electrode of the other touch unit.

[0055] In some embodiments, the touch electrode includes: a first touch electrode and a second touch electrode;

[0056] The first touch electrode includes: a third touch sub-electrode and a fourth touch sub-electrode arranged in a row direction, the third touch sub-electrode and the fourth touch sub-electrode are symmetrically arranged and electrically connected; the width of the third touch sub-electrode and the fourth touch sub-electrode at ends closer to each other is smaller than the width of ends farther away from each other;

[0057] The second touch electrode includes: a first touch sub-electrode and a second touch sub-electrode arranged in a column direction, the first touch sub-electrode and the second touch sub-electrode being symmetrically arranged and electrically connected; and the first touch sub-electrode and the second touch sub-electrode have ends closer to each other with a width smaller than ends farther away from each other;

[0058] In the same touch electrode, the first touch electrode and the second touch electrode are cross-insulated.

[0059] In some embodiments, the first touch electrode and the second touch electrode constitute a touch unit, and the touch display substrate includes a plurality of touch units arranged in an array. In two touch units adjacent along the row direction, the first touch sub-electrode of the second touch electrode of one touch unit is electrically connected to the second touch sub-electrode of the second touch electrode of the other touch unit; in two touch units adjacent along the column direction, the third touch sub-electrode of the first touch electrode of one touch unit is electrically connected to the fourth touch sub-electrode of the first touch electrode of the other touch unit.

[0060] On the other hand, an embodiment of the present disclosure provides a touch display device, which includes any one of the above-mentioned touch display substrates.

[0061] On the other hand, an embodiment of the present disclosure provides a method for preparing a touch display substrate, which is used to prepare any of the above-mentioned touch display substrates, wherein the preparation method comprises:

[0062] forming a display signal line on the substrate by a patterning process, wherein the display signal line is used to provide a display signal to the display pixel;

[0063] forming a second signal line on the substrate by a patterning process, wherein the second signal line is electrically connected to the constant potential terminal;

[0064] A plurality of touch signal lines extending along a preset direction are formed on the substrate by a patterning process; the plurality of touch signal lines constitute touch electrodes in a grid structure;

[0065] The orthographic projection of the second signal line on the substrate at least partially overlaps with the orthographic projection of part of the touch signal line on the substrate;

[0066] And / or, the orthographic projection of the second signal line on the substrate at least partially overlaps with the orthographic projection of part of the display signal line on the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0068] Figure 1 Schematic diagram of a partial planar structure of a portion of layers of a touch display substrate in an embodiment of the present disclosure;

[0069] Figure 2 for Figure 1 Schematic diagram of the cross section of the middle A area;

[0070] Figure 3 for Figure 1 Schematic diagram of the cross section of region B;

[0071] Figure 4 is a partial planar structural diagram of a touch display substrate in an embodiment of the present disclosure;

[0072] Figure 5 for Figure 4 A schematic cross-sectional view of the area within the dotted box;

[0073] Figure 6 is a schematic diagram of a touch electrode in an embodiment of the present disclosure;

[0074] Figure 7 is a schematic diagram of a touch display substrate in an embodiment of the present disclosure;

[0075] Figure 8 is a schematic diagram of another touch display substrate in an embodiment of the present disclosure;

[0076] Figure 9 is a schematic diagram of another touch display substrate in an embodiment of the present disclosure;

[0077] Figure 10 is a partial planar structural diagram of another touch display substrate in an embodiment of the present disclosure;

[0078] Figure 11 is a schematic diagram of another touch unit in an embodiment of the present disclosure;

[0079] Figure 12 The figure is a flow chart of a method for preparing a touch display substrate in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0080] The present disclosure is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant disclosure and are not intended to limit the disclosure. It should also be noted that, for ease of description, only portions relevant to the disclosure are shown in the accompanying drawings.

[0081] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0082] Furthermore, in the following detailed description, for ease of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it will be apparent that one or more embodiments can be practiced without these specific details.

[0083] It should be understood that, although the terms first, second, etc. can be used here to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiments, the first element can be named as the second element, and similarly, the second element can be named as the first element. As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items.

[0084] It should be understood that when an element or layer is referred to as being "formed on" another element or layer, the element or layer may be formed directly or indirectly on the other element or layer. That is, for example, there may be intermediate elements or intermediate layers. Conversely, when an element or layer is referred to as being "formed directly on" another element or layer, there are no intermediate elements or intermediate layers. Other terms used to describe the relationship between elements or layers (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.) should be interpreted in a similar manner.

[0085] The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the embodiments. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. It will also be understood that when the terms "comprise" and / or "include" are used herein, the description indicates the presence of features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0086] In this document, unless otherwise specified, the expressions "located on the same layer" or "disposed on the same layer" generally mean that the first component and the second component can be made of the same material and can be formed by the same patterning process. The expressions "located on different layers" or "disposed on different layers" generally mean that the first component and the second component are formed by different patterning processes.

[0087] In some embodiments, the present disclosure provides a touch display substrate. Figures 1 to 5 The touch display substrate includes: a substrate 01, and touch electrodes, display signal lines, second signal lines 3, etc. arranged on the substrate 01. Figure 4 As shown, the touch electrode includes: a plurality of touch signal lines 2 extending along at least two intersecting directions; the plurality of touch signal lines 2 form a grid structure; a display signal line is electrically connected to a display pixel for providing a display signal to the display pixel; a second signal line 3 is electrically connected to a constant potential end; the second signal line 3 is located between a layer where the touch signal line 2 is located and a layer where the display signal line is located; an orthographic projection of the second signal line 3 on the substrate 01 at least partially overlaps with an orthographic projection of at least part of the touch signal line on the substrate 01; and / or, an orthographic projection of the second signal line 3 on the substrate 01 at least partially overlaps with an orthographic projection of at least part of the display signal line on the substrate 01.

[0088] During the operation of the touch display substrate, the touch signal is transmitted in the touch signal line 2, which is a jumping electrical signal; the display signal line is used to provide the display signal to the display pixel, and the display signal is also a jumping electrical signal. Among them, the distance between the layer where the touch signal line is located and the layer where the display signal line is located is relatively close, and coupling will be formed between the touch signal line 2 and the display signal line, resulting in easy interference between the touch signal and the display signal, affecting the yield of the touch display substrate. In addition, when the display substrate is used in a vehicle-mounted transparent display window, as the thickness of the touch display substrate decreases, the distance between the touch signal line 2 and the display signal line becomes closer, about 20μm, and the crosstalk between the touch signal line 2 and the display signal line becomes more obvious, causing the touch display substrate to be prone to display anomalies and touch failure.

[0089] In the embodiment of the present disclosure, in a touch display substrate having a grid structure, a second signal line 3 electrically connected to a constant potential terminal is provided between the touch signal line 2 and the display signal line, that is, the potential of the second signal line 3 is maintained constant. The second signal line 3 is used to separate the touch signal line 2, which transmits a transitional electrical signal, from the display signal line. The constant electrical signal of the second signal line 3 reduces the crosstalk between the display signal of the display signal line and the touch signal of the touch signal line 2. Thus, during the touch phase, the second signal line 3 shields the influence of the display signal line on the touch signal line 2, thereby improving the touch signal-to-noise ratio (SNR). Furthermore, during the display phase, the second signal line 3 shields the influence of the touch signal line 2 on the display signal line, thereby improving the problem of water ripples on the display screen.

[0090] The constant potential terminal can be grounded or connected to the negative electrode of the power supply. It is understood that in conventional touch display substrates, constant potential signal lines, such as VSS lines and VDD lines, are provided in the relevant control circuits. In the disclosed embodiments, based on existing technologies, the pattern of the VSS line in the pixel circuit of the existing touch display substrate can be adjusted, and the VSS line can be provided between the display signal line and the touch signal line layer to shield the coupling effect between the display signal and the touch signal, while avoiding the addition of additional structures and reducing the production cost of the control touch display substrate.

[0091] The present disclosure provides a touch display substrate, for example, a touch display substrate with an on-cell electrode. Figures 1 to 8 As shown, the touch display substrate includes a base 01 and a plurality of touch units TU arranged in an array on the base 01. The touch unit array may be an m×n array, where m and n may be equal or unequal.

[0092] Reference Figure 4As shown, in some embodiments, a touch electrode includes: a plurality of first touch signal lines 21 extending along a column direction (e.g., the Y direction in the figure), and a plurality of second touch signal lines 22 extending along a row direction (e.g., the X direction in the figure); the row direction intersects the column direction; and the plurality of first touch signal lines 21 and the plurality of second touch signal lines 22 define a grid structure. In the present disclosure, a touch electrode with a grid structure is formed by a plurality of touch signal lines 2. In a single touch electrode, the plurality of first touch signal lines 21 are arranged along the row direction and extend along the column direction, and the plurality of first touch signal lines 21 are connected by second touch signal lines 22 extending along the row direction. In other words, the first touch signal lines 21 and the second touch signal lines 22 are arranged in an interlaced manner, thereby forming a touch electrode with a grid structure. It should be noted that in the present disclosure, the touch electrode has a grid structure, but the touch electrode does not affect the overall pattern shape of the touch electrode. Depending on the outer contour of the touch electrode pattern, the touch electrode can have various shapes, such as a strip touch electrode or a diamond touch electrode.

[0093] The touch display substrate provided in the embodiments of the present disclosure also includes a display pixel layer, such as an OLED display electrode layer and an encapsulation layer, located between the substrate and the touch cell array, thereby forming an on-cell electrode touch display substrate. The multiple display pixels are arranged in an array, which can be a p×q array, where p and q can be equal or unequal.

[0094] In the embodiment of the present disclosure, a grid-shaped cathode layer is further included. The cathode layer includes a plurality of first cathode patterns 401 and a plurality of second cathode patterns (not shown in the figure). The plurality of first cathode patterns 401 are distributed in an array, and adjacent first cathode patterns 401 are coupled via at least one second cathode pattern. Figure 4 As shown, the orthographic projection of the first cathode pattern 401 on the substrate covers each pixel opening area in the corresponding display pixel unit.

[0095] Exemplarily, each display sub-pixel includes a pixel opening region. The pixel opening region is defined by a pixel definition layer in the display substrate and serves as the effective light-emitting area of ​​the display sub-pixel. A display pixel unit may include a red display sub-pixel R, a green display sub-pixel G, and a blue display sub-pixel B. Each color display sub-pixel includes a corresponding pixel opening region, and the pixel opening regions included in display sub-pixels of different colors may be the same or different in size.

[0096] In some embodiments, reference Figure 4 and Figure 5As shown, the orthographic projections of some touch signal lines 2 on substrate 01 overlap with the projections of at least some display signal lines on substrate 01. The orthographic projections of the second signal lines 3 on substrate 01 at least cover the overlapping area. When the orthographic projections of the touch signal lines 2 and the display signal lines on substrate 01 overlap, crosstalk between the touch signals transmitted by the touch signal lines 2 and the display signals transmitted by the display signal lines is relatively significant. In the present disclosure, the second signal lines 3 are used to cover at least the overlapping area between the display signal lines and the touch signal lines 2, thereby effectively shielding the signal crosstalk between the display signal lines and the touch signal lines 2.

[0097] In some embodiments, at least in the width direction, the orthographic projection of a portion of the touch signal line 2 on the substrate 01 and the orthographic projection of a portion of the display signal line on the substrate 01 are completely covered by the other; the orthographic projection of the second signal line 3 on the substrate 01 covers the orthographic projection of a portion of the display signal line on the substrate 01. It is understood that the width direction of the touch signal line should be perpendicular to its extension direction. For example, the width direction of the touch signal line 2 extending in the row direction can be the column direction. Depending on the width relationship between the touch signal line 2 and the display signal line, the orthographic projection of one on the substrate 01 can completely cover the orthographic projection of the other on the substrate 01. Specifically, the orthographic projection of the touch signal line 2 on the substrate 01 can cover the orthographic projection of the display signal line on the substrate 01, or the orthographic projection of the display signal line on the substrate 01 can cover the orthographic projection of the touch signal line 2 on the substrate 01.

[0098] In some embodiments, reference Figure 5 As shown, in the width direction, the orthographic projection of the second signal line 3 on the substrate 01 can overlap the orthographic projection of the display signal line on the substrate 01 and / or overlap the orthographic projection of the touch signal line 2 on the substrate 01. In other words, the width of the second signal line 3 is greater than the width of the display signal line; and / or, the width of the second signal line 3 is greater than the width of the touch signal line. When the second signal line 3 has a larger width, the second signal line 3 can further isolate interference between the display signal line and the touch signal line 2.

[0099] In some embodiments, the difference between the width of the display signal line and the width of the touch signal line 2 is less than a predetermined value. The display signal line is used to transmit display signals from the touch display substrate, while the touch signal line 2 is used to transmit touch signals. Essentially, both the display signal line and the touch signal line 2 are conductive lines. In transparent displays, to ensure the light transmittance of the touch display substrate, the widths of the display signal line and the touch signal line 2 should be within a certain range.

[0100] Furthermore, in some embodiments, the width of the display signal line is equal to the width of the touch signal line 2. Specifically, the width of the display signal line can be 3 μm. The width of the touch signal line 2 can be 3 μm.

[0101] In some embodiments, the width of the second signal line 3 may be equal to the width of the display signal line and the touch signal line 2, which is 3 μm. In other examples, the width of the second signal line 3 may be wider than the width of the display signal line and the touch signal line 2, which may be 6 μm, for example.

[0102] The numerical values ​​in the embodiments of the present application do not strictly require limits, such as 3 microns, and values ​​within the range of measurement error and process error are allowed, such as values ​​between 2.5-3.5 microns.

[0103] Reference Figures 1 to 5 As shown, in some embodiments, the display signal line includes: a first display signal line 11 extending along the column direction; the touch electrode includes: a first touch signal line 21 extending along the column direction; the orthographic projection of the first display signal line 11 on the substrate 01 overlaps with the orthographic projection of part of the first touch signal line 21 on the substrate 01; the orthographic projection of part of the second signal line 3 on the substrate 01 covers the orthographic projection of the first display signal line 11 on the electrical substrate 01.

[0104] The first display signal line 11 may include a data line, etc., which may extend along the column direction of the display pixel array. At least one first display signal line 11 is connected to the display sub-pixels in a column of display pixels to provide display data signals for the display sub-pixels. The display sub-pixels connected to a display signal line have the same color. The extension direction of the first touch signal line 21 of the touch electrode is consistent with the extension direction of the first display signal line 11, or the extension direction is partially consistent or the extension direction contour is consistent, and a different layer of insulation is set between the two. In order to achieve a thin touch display substrate, the thickness of the insulating layer between the layer where the first touch signal line 21 is located and the layer where the first display signal line 11 is located is relatively thin. The touch signal of the first touch signal line 21 and the display data signal of the first display signal line 11 are both jump signals. Crosstalk is likely to occur between the two, which will affect both touch and display effects. In this embodiment, a second signal line 3 with a constant potential is provided between the first touch signal line 21 and the first display signal line 11. The second signal line 3 is used to isolate the coupling between the first touch signal line 21 and the first display signal line 11, thereby minimizing the mutual influence between touch and display, and improving the overall performance of the touch display substrate.

[0105] Reference Figures 1 to 5 As shown, in some embodiments, the display signal line further includes: a second display signal line 12 extending along the row direction; the touch electrode further includes: a second touch signal line 22 extending along the row direction; the orthographic projection of the second display signal line 12 on the substrate 01 overlaps with the orthographic projection of part of the second touch line on the substrate 01; the orthographic projection of part of the second signal line 3 on the substrate 01 covers the orthographic projection of the second display signal line 12 on the electrical substrate 01.

[0106] Among them, the second display signal line 12 may include a gate line, a reset signal line, a bias voltage line, a light-emitting control line, and other lines for transmitting jump electrical signals. Preferably, the second display signal line 12 includes a gate line. The data line and the gate line are the main signal lines that provide driving display signals to the display sub-pixels. The gate voltage signal and the data voltage signal have a direct impact on the display of the display sub-pixels. In the embodiment of the present disclosure, a second signal line can be set between the gate line, the data line and other signal lines and the touch signal line 2 to shield the mutual influence between the display signal and the touch signal, thereby improving the overall product performance of the touch display substrate.

[0107] The touch unit TU includes a first touch electrode 2A and a second touch electrode 2B. Both the first touch electrode 2A and the second touch electrode 2B have a metal mesh structure and are electrically insulated from each other. One of the first touch electrode 2A and the second touch electrode 2B can be a drive electrode, and the other can be a sense electrode.

[0108] In some embodiments, as Figure 6 As shown, the touch electrode includes: a first touch electrode 2A and a second touch electrode 2B; the first touch electrode 2A includes: a first sub-portion 11 extending along the row direction; a plurality of first finger-shaped portions 12 extend from the first sub-portion 11 along the column direction intersecting the row direction away from the first sub-portion 11, and the plurality of first finger-shaped portions 12 are located on one side of the first sub-portion 11; a plurality of second finger-shaped portions 13 extend from the first sub-portion 11 along the column direction away from the first sub-portion 11, and the plurality of second finger-shaped portions 13 are located on the other side of the first sub-portion 11; the second touch electrode 2B includes a first touch sub-electrode 2B1 and a second touch sub-electrode 2B2; the first touch sub-electrode 2B1 includes: The second sub-portion 211 extends in the row direction, the second sub-portion 211 is located on one side of the first sub-portion 11; and a plurality of third finger-shaped portions 212 extend from the second sub-portion 211 along the column direction toward the first sub-portion 11; the second touch sub-electrode 2B2 includes: a third sub-portion 221 extends along the row direction, the third sub-portion 221 is located on the other side of the first sub-portion 11; and a plurality of fourth finger-shaped portions 222 extend from the third sub-portion 221 along the column direction toward the first sub-portion 11, wherein the plurality of first finger-shaped portions 12 and the plurality of third finger-shaped portions 212 are alternately arranged in the row direction, and the plurality of second finger-shaped portions 13 and the plurality of fourth finger-shaped portions 222 are alternately arranged in the row direction.

[0109] In some embodiments, reference Figure 6 As shown, the plurality of first fingers 12 and the plurality of third fingers 212 are alternately arranged along the row direction, and the plurality of second fingers 13 and the plurality of fourth fingers 222 are alternately arranged along the row direction.

[0110] In some embodiments, the first touch electrode 2A and the second touch electrode 2B are formed in the same layer using the same material, i.e., the first touch electrode 2A and the second touch electrode 2B can be formed simultaneously using the same patterning process. For example, both are made of the same metal material, such as Al, Ag, Cu, etc.

[0111] In some embodiments, the first touch electrode 2A and the second touch electrode 2B may be a single-layer metal structure or a multi-layer metal structure, such as a Ti—Al—Ti stacked metal structure.

[0112] In some embodiments, the thickness of the first touch electrode 2A and the second touch electrode 2B is 1 nm-1000 nm.

[0113] In some embodiments, see Figure 6 and Figure 7 As shown, for any two adjacent touch units TU in the row direction, the first sub-portions 11 of the first touch electrodes 2A are electrically connected to each other, for example, the first sub-portions 11 of their first touch electrodes 2A are integrally formed. For any two adjacent touch units TU in the column direction, the second sub-portion 211 of the first touch sub-electrode 2B1 of the second touch electrode 2B of one touch unit TU is electrically connected to the third sub-portion 221 of the second touch sub-electrode 2B2 of the second touch electrode 2B of the other touch unit TU, for example, the second sub-portion 211 of the first touch sub-electrode 2B1 of the second touch electrode 2B of one touch unit TU is integrally formed.

[0114] The first touch electrodes 2A of the multiple touch units TU arranged in an array form multiple first touch electrode structures extending in the row direction, and the second touch electrodes 2B of the multiple touch units TU arranged in an array form multiple second touch electrode structures extending in the column direction. The first touch electrode 2A structure is either a touch drive electrode structure or a touch sensing electrode structure, and the second touch electrode 2B structure is the other of the touch drive electrode structure and the touch sensing electrode structure.

[0115] In some embodiments, the touch display substrate further includes: a bridging portion extending along the column direction and configured to electrically connect the first touch sub-portion and the second touch sub-portion; the bridging portion is located in the first electrode layer, the first touch electrode 2A and the second touch electrode 2B are located in the second electrode layer, and the first electrode layer and the second electrode layer are arranged in sequence away from the substrate.

[0116] The bridging portion extends along the column direction and is configured to electrically connect the first touch sub-electrode 2B1 and the second touch sub-electrode 2B2. Specifically, the bridging portion is located in the first electrode layer, and the second electrode 30 is closer to the substrate 01 than the second electrode layer where the first touch electrode 2A and the second touch electrode 2B are located. The insulating layer is provided between the second electrode layer and the first electrode layer. The bridging electrode is electrically connected to the third finger-shaped portion 212 and the fourth finger-shaped portion 222, which are separated and opposed by the first sub-portion 11, respectively, through vias penetrating the insulating layer. It will be understood by those skilled in the art that the bridging portion intersects with the lines of the complete mesh structure formed by the first touch electrode 2A, the second touch electrode 2B and the optical compensation lines as a whole, and overlaps with the hollowed-out area of ​​the complete mesh structure.

[0117] In some embodiments, the bridging portion is located in a different layer from the first touch electrode 2A and the second touch electrode 2B. That is, the bridging portion and the first touch electrode 2A and the second touch electrode 2B are formed using different patterning processes. The bridging portion can also be made of a metal material such as Al, Ag, Cu, etc. In some embodiments, the bridging portion can be a single-layer metal structure or a multi-layer metal structure, such as a Ti-Al-Ti stacked metal structure. In some embodiments, the thickness of the bridging portion is 1 nm to 1000 nm.

[0118] In some embodiments, the bridge portion may include a plurality of mutually parallel metal lines extending along the column direction, for example, two metal lines.

[0119] In other embodiments, see Figure 8 and Figure 9 As shown, the touch electrode may include: a first touch electrode 2A and a second touch electrode 2B; the first touch electrode 2A includes: a third touch sub-electrode 2A1 and a fourth touch sub-electrode 2A2 arranged along the row direction, the third touch sub-electrode 2A1 and the fourth touch sub-electrode 2A2 are symmetrically arranged and electrically connected; the width of the third touch sub-electrode 2A1 and the fourth touch sub-electrode 2A2 at one end close to each other is smaller than the width at one end away from each other; the second touch electrode 2B includes: a first touch sub-electrode 2B1 and a second touch sub-electrode 2B2 arranged along the column direction, the first touch sub-electrode 2B1 and the second touch sub-electrode 2B2 are symmetrically arranged and electrically connected. The width of the first touch sub-electrode 2B1 and the second touch sub-electrode 2B2 at one end close to each other is smaller than the width at one end away from each other. The overall shape of the first touch sub-electrode 2B1, the second touch sub-electrode 2B2, the third touch sub-electrode 2A1 and the fourth touch sub-electrode 2A2 may be approximately an isosceles triangle. Refer to Figure 8 and Figure 9As shown, in the same touch unit TU, the first touch sub-electrode 2B1 and the second touch sub-electrode 2B2 are symmetrically arranged, the third touch sub-electrode 2A1 and the fourth touch sub-electrode 2A2 are symmetrically arranged, and the first touch sub-electrode 2B1, the second touch sub-electrode 2B2, the third touch sub-electrode 2A1 and the fourth touch sub-electrode 2A2 are cross-arranged along the center of the touch electrode.

[0120] See also Figure 8 and Figure 9 As shown, the first touch electrode 2A and the second touch electrode 2B constitute a touch unit TU, and the touch display substrate includes a plurality of touch units TU arranged in an array. In two touch units TU adjacent to each other along the row direction, the third touch sub-electrode 2A1 of the first touch electrode 2A of one touch unit TU is electrically connected to the fourth touch sub-electrode 2A2 of the first touch electrode 2A of the other touch unit TU; in two touch units TU adjacent to each other along the column direction, the first touch sub-electrode 2B1 of the second touch electrode 2B of one touch unit TU is electrically connected to the second touch sub-electrode 2B2 of the second touch electrode 2B of the other touch unit TU.

[0121] The first touch electrodes 2A of the multiple touch units TU arranged in an array form a structure of multiple first touch electrodes 2A extending in the row direction, and the second touch electrodes 2B of the multiple touch units TU arranged in an array form a structure of multiple second touch electrodes 2B extending in the column direction. The first touch electrode 2A structure is one of the touch drive electrode structure and the touch sensing electrode structure, and the second touch electrode 2B structure is the other of the touch drive electrode structure and the touch sensing electrode structure.

[0122] The first touch electrode 2A and the second touch electrode 2B are arranged adjacent to each other, for example Figure 9 As shown, the two sides of the third touch sub-electrode 2A1 of the first touch electrode 2A are adjacent to the first touch sub-electrode 2B1 and the second touch sub-electrode 2B2 of the second touch electrode 2B respectively; the two sides of the fourth touch sub-electrode 2A2 of the first touch electrode 2A are adjacent to the first touch sub-electrode 2B1 and the second touch sub-electrode 2B2 of the second touch electrode 2B respectively.

[0123] On the other hand, an embodiment of the present disclosure provides a touch display substrate, comprising: a substrate, and touch electrodes arranged on the substrate. The touch display substrate provided in this embodiment has a similar structure to the touch display substrate provided in the aforementioned embodiment. Specifically, the touch electrode comprises: a plurality of second touch signal lines 22 extending along the row direction, a plurality of first touch signal lines 21 extending along the column direction; the row direction intersects with the column direction; a display signal line, which is arranged on the substrate and extends along the column direction; in particular, in an embodiment of the present disclosure, the touch display substrate further comprises: a floating signal line 5, which is arranged on the substrate, and the floating signal line is insulated from the touch electrode and the display signal line; the orthographic projection of the floating signal line on the substrate overlaps with the orthographic projection of the display signal line on the substrate, and falls within the orthographic projection range of the touch electrode on the substrate.

[0124] In the touch display substrate provided by the embodiment of the present disclosure, a floating signal line is set in the touch display substrate, and the floating signal line is used to shield the display signal transmitted on the display signal line, thereby reducing the mutual interference between the touch signal and the display signal, thereby effectively improving the touch signal-to-noise ratio of the touch layer, avoiding touch signal distortion, improving touch performance, and improving the display picture effect of the touch display device.

[0125] In some embodiments, the orthographic projection of the first touch signal line 21 on the substrate does not overlap with the orthographic projection of the first display signal line 11 on the substrate, and the orthographic projection of part of the second touch signal line 22 on the substrate is located between the orthographic projections of two adjacent first display signal lines 11 on the substrate. The orthographic projection of part of the second touch signal line 22 on the substrate connects the first touch signal line 21 located between the two adjacent first display signal lines 11, and the orthographic projection of part of the second touch signal line 22 on the substrate intersects with the orthographic projection of the first display signal line 11 on the substrate, and connects the first touch signal lines 21 located on both sides of the first display signal line 11.

[0126] Reference Figure 10 As shown, in the present disclosure, the first touch signal lines 21 extend along the column direction and can be located between some adjacent first display signal lines 11. The orthographic projections of the first touch signal lines 21 on the substrate do not overlap with the orthographic projections of the first display signal lines 11 on the substrate. That is, in this embodiment, by spacing the first touch signal lines 21 and the first display signal lines 11 apart in their respective locations, the mutual interference between the touch signals transmitted by the first touch signal lines 21 and the display signals transmitted by the first display signal lines 11 is reduced, thereby effectively improving the touch signal-to-noise ratio of the touch layer, avoiding touch signal distortion, improving touch performance, and enhancing the display quality of the touch display device.

[0127] Reference Figure 11As shown, at least some of the spaces between two adjacent first display signal lines 11 form a spacer. One or more first touch signal lines 21 may be disposed in this spacer. Multiple first touch signal lines 21 located between two adjacent first display signal lines 11 (i.e., located in the same spacer) may be connected via a second touch signal line 22. Furthermore, first touch signal lines 21 located in different spacers may be connected via a second touch signal line 22. The orthographic projection of the second touch signal line 22 used to connect first touch signal lines 21 in the same spacer does not overlap with the orthographic projection of the first display signal line 11 on the substrate. However, the orthographic projection of the second touch signal line 22 used to electrically connect first touch signal lines 21 in different spacers does overlap with the orthographic projection of the first display signal line 11 on the substrate.

[0128] In some embodiments, the floating signal line is located between two adjacent first touch signal lines 21 and extends along the row direction; the orthographic projection of the floating signal line on the substrate intersects with the orthographic projection of the first display signal line 11 of the two adjacent first touch signal lines 21 on the substrate.

[0129] See also Figure 11 As shown, in some embodiments, at least a portion of the floating signal lines 5 are collinearly arranged with the second touch signal lines 22. In the disclosed embodiment, the floating signal lines 5 are collinearly arranged with the second touch signal lines 22. The second touch signal lines 22 connect multiple first touch signal lines 21, thereby maintaining a consistent potential on the same touch electrode. However, the same second touch signal line 22 does not necessarily have to pass through the touch electrode; first touch signal lines 21 can be connected via multiple different second touch signal lines 22. It is understood that due to different extension directions, when the second touch signal line 22 connects to the first touch signal line 21, its orthographic projection on the substrate 01 may overlap with the orthographic projection of the first sub-display signal line 11 on the substrate 01. In this embodiment, the portion of the second touch signal line 22 extending across the first sub-display signal line 11 is cut off and configured as a floating signal line 5. Utilizing the floating signal line 5 reduces the coupling capacitance between the touch electrode and the display signal line, reduces mutual interference between the display signal and the touch signal, and improves display quality and touch performance. In other words, in the embodiment of the present disclosure, part of the signal lines extending along the column direction can be divided into multiple segments, and the signal lines of some segments serve as the second touch signal lines 22 and are connected to the first touch signal lines 21, thereby realizing the electrical connection of the touch signal lines in the same touch electrode; the signal lines of some segments are floatingly set as floating signal lines 5 to reduce the signal interference of the touch electrodes on the display signal lines in the original existing technology.

[0130] It should be noted that, in the embodiment of the present disclosure, some of the floating signal lines 5 are arranged in the same line with the second touch signal line 22. At the same time, some of the floating signal lines may not be arranged in the same line with the second touch signal line. Specifically, multiple first touch signal lines 21 can be electrically connected through multiple second touch signal lines 22, and two adjacent first touch signal lines 21 can be connected through one or more second touch signal lines 22. At the same time, the second touch signal line 22 connecting the multiple first touch signal lines 21 can be arranged in the same line or in a non-collinear manner. The setting of the second touch signal line 22 and the floating signal line 5 can be set according to actual needs, with reference to the requirements for touch electrodes and signal shielding crosstalk requirements. It can be understood that when the floating signal line 5 and the second touch signal line 22 are arranged in the same line, the touch electrode of the grid structure provided in the embodiment of the present disclosure does not necessarily have a uniform grid pattern in a strict sense, but can also be a grid pattern composed of various different grids formed by interlacing multiple first touch signal lines 21 and multiple second touch signal lines 22, which will not be described in detail one by one in the embodiment of the present disclosure.

[0131] In some examples, the first touch signal line 21 , the second touch signal line 22 , and the floating signal line 5 are formed of the same material and disposed in the same layer.

[0132] The floating signal line 5 can be formed using the same material and layer as the first touch signal line 21 and the second touch signal line 22. That is, the floating signal line 5 can be formed simultaneously with the first touch electrode 2A and the second touch electrode 2B using the same patterning process. Alternatively, the floating signal line 5 can be formed independently using the same patterning process. For example, both can be made of the same metal material, such as Al, Ag, or Cu. In some embodiments, the floating signal line 5 can have a single-layer metal structure or a multi-layer metal structure, such as a Ti-Al-Ti stacked metal structure.

[0133] In some embodiments, the touch electrode substrate provided in this embodiment may include multiple touch electrodes, including a first touch electrode 2A and a second touch electrode 2B. Both the first touch electrode 2A and the second touch electrode 2B may have a metal mesh structure and be electrically insulated from each other. One of the first touch electrode 2A and the second touch electrode 2B may be a drive electrode, and the other may be a sense electrode.

[0134] The specific structures and related information of the first touch electrodes 2A and the second touch electrodes 2B can be referred to the related descriptions in the above embodiments and will not be described in detail here.

[0135] On the other hand, the present disclosure provides a touch display device, comprising any one of the above-mentioned touch display substrates.

[0136] Specifically, the touch display device can be any product or component with display function, such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc.

[0137] On the other hand, see Figure 12 As shown, some embodiments of the present disclosure provide a method for preparing a touch display substrate, which can be used to prepare any of the touch display substrates provided in the aforementioned embodiments. The preparation method may include the following steps:

[0138] S01. Forming display signal lines on a substrate through a patterning process, where the display signal lines are used to provide display signals to display pixels.

[0139] The display signal lines may include: first display signal lines 11 extending along the column direction, second display signal lines 12 extending along the row direction, etc. The first display signal lines 11 may include data lines, etc., which may extend along the column direction of the display pixel array. Each first display signal line 11 is connected to a column of display pixels and provides display data signals to the display pixels. The second display signal lines 12 may include gate lines, reset signal lines, bias voltage lines, and other lines that transmit transition electrical signals.

[0140] S02. Form a first insulating layer on the substrate having the display signal lines formed thereon.

[0141] S03. Form a second signal line on the substrate through a patterning process, wherein the second signal line is electrically connected to the constant potential terminal.

[0142] The constant potential terminal can be grounded or connected to the negative electrode of the power supply. It is understood that in conventional touch display substrates, constant potential lines, such as VSS lines and VDD lines, are provided in the relevant control circuits. In the disclosed embodiments, based on existing technologies, the pattern of the VSS line in the pixel circuit of the existing touch display substrate can be adjusted, and the VSS line can be provided between the display signal line and the touch signal line layer to shield the coupling effect between the display signal and the touch signal, while avoiding the addition of additional structures and reducing the production cost of the control touch display substrate.

[0143] S04, forming a second insulating layer on the substrate having the second signal line formed thereon.

[0144] S05 . Forming a plurality of touch signal lines extending along a preset direction on the substrate through a patterning process; the plurality of touch signal lines constitute touch electrodes in a grid structure.

[0145] The touch electrodes include: a plurality of first touch signal lines 21 extending in the column direction; and a plurality of second touch signal lines 22 extending in the column direction; the plurality of first touch signal lines 21 and the plurality of second touch signal lines 22 define a grid structure. In the present disclosure, the touch unit includes first touch electrodes 2A and second touch electrodes 2B. Both the first touch electrodes 2A and the second touch electrodes 2B have a metal grid structure and are electrically insulated from each other.

[0146] The first touch electrodes 2A of the touch units arranged in an array form multiple first touch electrode structures extending in the row direction, and the second touch electrodes 2B of the touch units arranged in an array form multiple second touch electrode structures extending in the column direction. The first touch electrode structure is one of the touch drive electrode structure and the touch sensing electrode structure, and the second touch electrode structure is the other of the touch drive electrode structure and the touch sensing electrode structure.

[0147] In some embodiments, the touch display substrate further includes: a bridging portion extending along the column direction and configured to electrically connect the first touch sub-portion and the second touch sub-portion; the bridging portion is located in the first electrode layer, the first touch electrode 2A and the second touch electrode 2B are located in the second electrode layer, and the first electrode layer and the second electrode layer are arranged in sequence away from the substrate.

[0148] In the present disclosure, the step of forming the touch electrode may specifically include the following steps:

[0149] S51: forming a first electrode material layer on a substrate, and patterning the first electrode material layer to form a first electrode layer, wherein the first electrode layer includes a bridge layer.

[0150] S52: forming a third insulating layer on the substrate on which the first electrode layer is formed, and forming via holes on the third insulating layer through a patterning process.

[0151] S53: forming a second electrode material layer on a side of the third insulating layer away from the substrate, and patterning the second electrode material layer to form a second electrode layer.

[0152] The second electrode layer includes a first touch electrode and a second touch electrode. The first touch sub-electrode 2B1 and the second touch sub-electrode 2B2 of the second touch electrode are electrically connected to the bridge portion through vias. The first touch electrode and the second touch electrode are both metal mesh structures and are electrically insulated from each other.

[0153] In some embodiments, before forming the first electrode material layer, the preparation method further comprises forming display pixels, an encapsulation layer, a buffer layer, etc. on the substrate at one time. The display pixels in the display pixels are connected to display signal lines.

[0154] In some embodiments, after step S01 , the preparation method further includes forming a protective layer covering the entire substrate, and the protective layer can be made of an organic or inorganic material.

[0155] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0156] While the embodiments of the present disclosure are described above, these embodiments do not exhaustively describe all details, nor do they limit the disclosure to specific embodiments. Clearly, many modifications and variations are possible based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present disclosure, thereby enabling those skilled in the art to better utilize the present disclosure and its modifications. The present disclosure is limited only by the claims and their full scope and equivalents.

Claims

1. A touch display substrate, wherein: include: substrate; A touch electrode is provided on the substrate; The touch electrodes include: a plurality of second touch signal lines extending along a row direction, and a plurality of first touch signal lines extending along a column direction; the row direction intersects the column direction; a first display signal line, disposed on the substrate and extending along the column direction; a floating signal line, disposed on the substrate, wherein the floating signal line is insulated from the touch electrode and the first display signal line; The orthographic projection of the floating signal line on the substrate overlaps with the orthographic projection of the first display signal line on the substrate and falls within the orthographic projection range of the touch electrode on the substrate; The touch electrodes include: a first touch electrode and a second touch electrode; The first touch electrode includes: a first sub-portion extending along a row direction; a plurality of first finger-shaped portions extending from the first sub-portion along the column direction away from the first sub-portion, the plurality of first finger-shaped portions being located on one side of the first sub-portion; a plurality of second finger-shaped portions extending from the first sub-portion along the column direction away from the first sub-portion, the plurality of second finger-shaped portions being located on the other side of the first sub-portion; The second touch electrode includes: a first touch sub-electrode and a second touch sub-electrode; The first touch sub-electrode includes: a second sub-portion extending along the row direction, the second sub-portion being located on one side of the first sub-portion; and a plurality of third finger-shaped portions extending from the second sub-portion along the column direction toward the first sub-portion; The second touch sub-electrode includes: a third sub-portion extending along the row direction, the third sub-portion being located on the other side of the first sub-portion; and a plurality of fourth finger-shaped portions extending from the third sub-portion along the column direction toward the first sub-portion; The plurality of first finger-shaped portions and the plurality of third finger-shaped portions are alternately arranged in a row direction, and the plurality of second finger-shaped portions and the plurality of fourth finger-shaped portions are alternately arranged in a row direction.

2. The touch display substrate according to claim 1, wherein: The orthographic projection of the first touch signal line on the substrate does not overlap with the orthographic projection of the first display signal line on the substrate, a portion of the orthographic projection of the second touch signal line on the substrate is located between the orthographic projections of two adjacent first display signal lines on the substrate, and this portion of the second touch signal line connects the first touch signal line located between the two adjacent first display signal lines; the orthographic projection of the part of the second touch signal line on the substrate intersects with the orthographic projection of the first display signal line on the substrate, and connects the first touch signal lines located on both sides of the first display signal line.

3. The touch display substrate according to claim 2, wherein: The floating signal line is located between two adjacent first touch signal lines and extends along the row direction; the orthographic projection of the floating signal line on the substrate intersects with the orthographic projections of the first display signal lines of the two adjacent first touch signal lines on the substrate.

4. The touch display substrate according to claim 3, wherein: At least a portion of the floating signal lines and the second touch signal lines are arranged collinearly.

5. The touch display substrate according to claim 3, wherein: The floating signal line extends along the column direction; the orthographic projection of the floating signal line on the substrate falls within the orthographic projection of the first display signal line on the substrate.

6. The touch display substrate according to claim 3, wherein: The floating signal line, the first touch signal line, and the second touch signal line are formed of the same material and are provided in the same layer.

7. The touch display substrate according to claim 1, wherein: Also includes: a bridging portion extending along the column direction and configured to electrically connect the first touch sub-electrode and the second touch sub-electrode; The bridge portion is located in the first electrode layer, the first touch electrode and the second touch electrode are located in the second electrode layer, and the first electrode layer and the second electrode layer are sequentially arranged away from the substrate.

8. The touch display substrate according to claim 7, wherein: Also includes: Display pixels are arranged on the substrate; as well as an encapsulation layer, disposed on a side of the display pixel away from the substrate and configured to cover the display pixel; The first electrode layer and the second electrode layer are sequentially arranged away from the packaging layer.

9. The touch display substrate according to claim 1, wherein: The first touch electrode and the second touch electrode constitute a touch unit, and the touch display substrate includes a plurality of touch units arranged in an array. In two touch units adjacent along the row direction, the first sub-portions of the first touch electrodes of the two touch units are electrically connected to each other; in two touch units adjacent along the column direction, the second sub-portion of the first touch sub-electrode of the second touch electrode of one touch unit is electrically connected to the third sub-portion of the second touch sub-electrode of the second touch electrode of the other touch unit.

10. A display device, wherein: The touch display substrate comprises the touch display substrate according to any one of claims 1 to 9, wherein the display device is a transparent touch display device.

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