CN212586865U - Touch display panel and display device - Google Patents

Abstract

The embodiment of the utility model provides a relate to and show technical field, disclose a touch-control display panel and display device. The touch display panel comprises a substrate and a grid metal layer arranged on the substrate; the common electrode layer is positioned on one side of the grid metal layer, which is far away from the substrate; a common electrode is arranged on the common electrode layer and is a whole-surface electrode; the touch metal layer is positioned on one side of the common electrode layer, which is far away from the substrate; the touch metal layer is provided with a plurality of touch electrodes and a plurality of touch wires, the touch electrodes are electrically connected with the touch wires in a one-to-one correspondence manner, and the touch electrodes are in a grid shape; the at least one touch electrode comprises at least two sub-touch electrodes, and touch wiring of other touch electrodes is arranged between every two adjacent sub-touch electrodes; and the cross bridges can electrically connect the sub-touch electrodes of the same touch electrode. The embodiment of the utility model provides a technical scheme can solve because the problem of the striation that the coupling difference of each public electrode piece and switch transistor's grid brought.

Description

Touch display panel and display device

Technical Field

The embodiment of the utility model provides a relate to and show technical field, especially relate to a touch-control display panel and display device.

Background

With the development of Display technology, Organic Light Emitting Diode (OLED) Display panels and Liquid Crystal Display (LCD) panels gradually become mainstream touch Display panels, and are widely applied to Display devices such as mobile phones, computers, and flat panels.

Currently, it has become a research focus to integrate a touch function on a display panel, and in the prior art, a plurality of common electrode blocks are usually disposed on a common electrode layer, and the common electrode blocks are reused as touch electrodes in a touch stage to realize embedded touch. However, when a display screen is displayed, since the common electrode blocks are independent and the switching transistors in the touch display panel are turned on line by line, the coupling conditions of the common electrode blocks and the gates of the switching transistors are different, so that horizontal stripes are likely to occur, and the display image quality is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a touch-control display panel and display device to solve the problem of the striae that brings because the coupling difference of each public electrode piece and switching transistor's grid.

In a first aspect, an embodiment of the present invention provides a touch display panel, which includes:

the semiconductor device comprises a substrate and a grid metal layer arranged on the substrate;

the common electrode layer is positioned on one side, away from the substrate, of the grid metal layer; a common electrode is arranged on the common electrode layer and is a whole-surface electrode;

the touch metal layer is positioned on one side of the common electrode layer, which is far away from the substrate; the touch metal layer is provided with a plurality of touch electrodes and a plurality of touch wires, the touch electrodes are electrically connected with the touch wires in a one-to-one correspondence manner, and the touch electrodes are in a grid shape; the at least one touch electrode comprises at least two sub-touch electrodes, and the touch routing of other touch electrodes is arranged between every two adjacent sub-touch electrodes;

a plurality of bridges electrically connecting the sub-touch electrodes of the same touch electrode.

Optionally, the touch display panel further includes:

the bridge-crossing metal layer is positioned on one side of the touch metal layer, which is far away from the common electrode layer, or is positioned on one side of the touch metal layer, which is far towards the common electrode layer; the plurality of bridge spans are located in the bridge span metal layer.

Optionally, the touch display panel further includes:

the pixel electrode layer is positioned on one side, facing the common electrode layer, of the touch metal layer; the pixel electrode layer is provided with a plurality of pixel electrodes, and the plurality of bridge spans are positioned on the pixel electrode layer.

Optionally, the touch electrodes are arranged in a matrix;

the touch electrodes comprise first touch electrode strips extending along the matrix row direction and second touch electrode strips extending along the matrix column direction, and the first touch electrode strips and the second touch electrode strips form a grid shape in a crossed mode.

Optionally, the range of the distance between adjacent first touch electrode strips along the matrix row direction is 20um to 300 um; and the range of the distance between the adjacent second touch electrode strips along the direction of the matrix column is 20um-300 um.

Optionally, the touch display panel further includes a black matrix, and orthographic projections of the touch electrodes and the touch traces on the substrate fall within an orthographic projection of the black matrix on the substrate.

Optionally, the touch display panel further includes a pixel electrode layer located on a side of the gate metal layer away from the substrate, and the pixel electrode layer is provided with a plurality of pixel electrodes;

the orthographic projections of the pixel electrodes on the substrate are spaced between the orthographic projections of the adjacent first touch electrode strips on the substrate, and the orthographic projections of the pixel electrodes on the substrate are spaced between the orthographic projections of the adjacent second touch electrode strips on the substrate.

Optionally, the touch display panel further includes a black matrix and a pixel electrode layer, and the pixel electrode layer is located on a side of the gate metal layer away from the substrate;

the pixel electrode layer is provided with a plurality of pixel electrodes, each pixel electrode comprises a plurality of first pixel electrode strips and a plurality of second pixel electrode strips, the first pixel electrode strips and the second pixel electrode strips extend along the direction of the matrix array, and obtuse included angles are formed between the first pixel electrode strips and the second pixel electrode strips;

the orthographic projection of a partial number of the first touch electrode bars on the substrate falls within the orthographic projection of a black matrix on the substrate, and the orthographic projection of the rest of the first touch electrode bars on the substrate is positioned between the orthographic projection of the first pixel electrode bars on the substrate and the orthographic projection of the second pixel electrode bars on the substrate;

the orthographic projection of the second touch electrode strips on the substrate falls within the orthographic projection of the black matrix on the substrate.

Optionally, the touch display panel further includes a source drain metal layer located between the gate metal layer and the common electrode layer;

the source-drain metal layer is provided with a plurality of data lines, and the orthographic projection of the touch wiring on the substrate falls in the orthographic projection of the data lines on the substrate.

In a second aspect, the embodiment of the present invention further provides a display device, which includes the touch display panel according to any embodiment of the present invention.

The embodiment of the utility model provides a touch-control display panel is through setting up public electrode into the whole face electrode for coupling effect between public electrode and switch transistor's the grid has the homogeneity, solves the striation problem. In addition, the whole common electrode is arranged between the touch metal layer and the grid metal layer, so that the common electrode can shield the coupling effect between the grid of the switching transistor and the touch electrode, the problem of mutual interference of signals on two sides of the common electrode is solved, and the effects of improving display image quality and improving detection precision are achieved.

Drawings

Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a touch metal layer in the touch display panel shown in FIG. 1;

FIG. 3 is a schematic view of another structure of a touch metal layer in the touch display panel shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a touch metal layer and a bridge in the touch display panel shown in FIG. 1;

fig. 5 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a touch metal layer and a pixel electrode layer in the touch display panel shown in FIG. 5;

FIG. 7 is a schematic structural diagram of a touch metal layer, a pixel electrode layer and a black matrix in the touch display panel shown in FIG. 5;

FIG. 8 is a schematic view of another structure of a touch metal layer and a pixel electrode layer in the touch display panel shown in FIG. 5;

FIG. 9 is a schematic view of another structure of the touch metal layer, the pixel electrode layer and the black matrix in the touch display panel shown in FIG. 5;

FIG. 10 is a schematic view of another structure of the touch metal layer, the pixel electrode layer and the black matrix in the touch display panel shown in FIG. 5;

wherein, the embodiment of the utility model provides an in, the reference numeral and the characteristic name that corresponds:

11-substrate, 12-gate metal layer, 13-common electrode layer, 14-touch metal layer, 141-touch electrode, 1411-sub-touch electrode, 1412-first touch electrode strip, 1413-second touch electrode strip, 142-touch trace, 143-pixel electrode, 1431-first pixel electrode strip, 1432-second pixel electrode strip, 15-bridge metal layer, 151-bridge, 16-black matrix, 17-pixel electrode layer, 18-first insulating layer, 19-source drain metal layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a touch metal layer in the touch display panel shown in fig. 1. Fig. 3 is a schematic view of another structure of a touch metal layer in the touch display panel shown in fig. 1. Fig. 4 is a schematic structural diagram of a touch metal layer and a bridge in the touch display panel shown in fig. 1. Referring to fig. 1 to 4, the touch display panel includes: a substrate 11, and a gate metal layer 12 provided on the substrate 11; a common electrode layer 13 located on a side of the gate metal layer 12 facing away from the substrate 11; a common electrode is arranged on the common electrode layer 13, and the common electrode is a whole-surface electrode; the touch metal layer 14 is positioned on one side, away from the substrate 11, of the common electrode layer 13; the touch metal layer 14 is provided with a plurality of touch electrodes 141 and a plurality of touch traces 142, the touch electrodes 141 are electrically connected with the touch traces 142 in a one-to-one correspondence, and the touch electrodes 141 are in a grid shape; the at least one touch electrode 141 includes at least two sub-touch electrodes 1411, and the touch trace 142 of another touch electrode 141 is disposed between two adjacent sub-touch electrodes 1411; and a plurality of bridges 151, wherein the bridges 151 electrically connect the sub-touch electrodes 1411 of the same touch electrode 141.

Specifically, the touch display panel may be a liquid crystal display panel, an organic light emitting diode display panel, or other display panels known to those skilled in the art, and is not limited herein.

In particular, the substrate 11 serves to support and protect the film layer thereon, and may be made of glass or other materials known to those skilled in the art, but is not limited thereto. The common electrode layer 13 is used for receiving a common voltage signal, and may be made of Indium Tin Oxide (ITO) or other materials known to those skilled in the art, which is not limited herein. The gate metal layer 12 may be a scan line, a gate of a switching transistor, molybdenum aluminum, or other materials known to those skilled in the art, and is not limited herein. The touch metal layer 14 may be made of mo-al-mo, ITO, or other materials known to those skilled in the art, and is not limited herein. The bridge 151 may be located on a side of the touch metal layer 14 facing the common electrode layer 13, as shown in fig. 1; the bridge 151 may also be located on a side of the touch metal layer 14 away from the common electrode layer 13, which is not limited herein and may be set by a person skilled in the art according to practical situations.

Specifically, the touch trace 142 is used for providing an excitation signal to the touch electrode 141 and receiving a touch signal fed back by the touch electrode 141. The touch electrode 141 is used to detect a touch position of a user, and the operation process thereof is as follows: each touch electrode 141 corresponds to a determined coordinate position, and the touch electrodes 141 respectively form capacitance with the ground. The touch detection circuit sends an excitation signal (e.g., a square wave scanning signal) to each touch electrode 141 through the touch trace 142, and when a finger touches the touch display panel, the capacitance of the finger is superimposed on the touch electrode 141 touched by the finger, so that the capacitance to ground of the touch electrode 141 touched by the finger changes. The change of the signal of each touch electrode 141 reflects the change of the capacitance of the touch electrode 141 to the ground. The specific signal of which touch electrode 141 changes can be determined by detecting the touch signal condition fed back by each touch electrode 141, and then the touch position of the finger can be determined according to the coordinate value corresponding to the touch electrode 141 with the changed signal.

Optionally, the orthographic projection of the grid-shaped touch electrode 141 on the substrate 11 and the orthographic projection of the sub-pixels of the touch display panel on the substrate 11 are at least partially not overlapped, so that the touch electrode 141 can have high light transmittance. It can be understood that, when the touch electrode 141 is in a grid shape, if the touch electrode 141 and the touch trace 142 are located on different layers, the touch electrode 141 and the touch trace 142 need to be electrically connected by punching, but the width of the touch electrode bars constituting the grid touch electrode 141 is usually smaller, and the problem of poor contact is easily caused by the punching electrical connection. However, in the present application, the touch electrodes 141 and the touch traces 142 are disposed on the same layer, so that the touch electrodes 141 and the touch traces 142 can be integrally formed through the same manufacturing process, thereby increasing the yield of electrical connection between the touch electrodes 141 and the touch traces 142.

It can be understood that, since the common electrode is an electrode formed over the entire surface, the coupling effect between the common electrode and the gate electrode of the switching transistor has uniformity, and thus, the horizontal stripe problem can be solved. In addition, since the common electrode is disposed between the touch metal layer 14 and the gate metal layer 12, mutual interference of signals at two sides thereof can be shielded, that is, the influence of the electric field generated by the switching transistor on the touch electrode 141 and the influence of the electric field generated by the touch electrode 141 on the switching transistor can be avoided.

The embodiment of the utility model provides a touch-control display panel is through setting up public electrode into the whole face electrode for coupling effect between public electrode and switch transistor's the grid has the homogeneity, solves the striation problem. In addition, the common electrode manufactured on the whole surface is arranged between the touch metal layer 14 and the gate metal layer 12, so that the common electrode can shield the coupling effect between the gate of the switching transistor and the touch electrode 141, the problem of mutual interference of signals on two sides of the common electrode is solved, and the effects of improving display image quality and improving detection precision are achieved.

On the basis of the foregoing technical solution, with reference to fig. 1, optionally, the touch display panel further includes: the bridge metal layer 15 is located on one side, away from the common electrode layer 13, of the touch metal layer 14, or located on one side, facing the common electrode layer 13, of the touch metal layer 14; the bridge 151 is located in the bridge metal layer 15, as shown in fig. 1.

Specifically, the bridge-spanning metal layer 15 may be made of mo-al-mo or other materials known to those skilled in the art, and is not limited herein. A first insulating layer 18 is disposed between the bridge-spanning metal layer 15 and the touch metal layer 14, and the first insulating layer 18 is used for electrically isolating the bridge-spanning 151 from the opposite touch traces 142.

Fig. 5 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention. Fig. 6 is a schematic structural diagram of a touch metal layer and a pixel electrode layer in the touch display panel shown in fig. 5. Optionally, the touch display panel further includes: a pixel electrode layer 17 located on a side of the touch metal layer 14 facing the common electrode layer 13; the pixel electrode layer 17 is provided with a plurality of pixel electrodes 143, and the bridge 151 is located on the pixel electrode layer 17.

The material of the pixel electrode layer 17 may be ITO or other transparent electrode materials known to those skilled in the art, and is not limited herein.

The advantage of this arrangement is that the pixel electrode 143 and the bridge 151 can be formed by the same process, which is beneficial to reducing the preparation process steps of the touch display panel, improving the preparation efficiency, and reducing the preparation cost.

Specifically, there are various specific implementation forms of the grid-shaped touch electrodes 141 and the touch traces 142, and a typical example is described below, but the present application is not limited thereto.

With continued reference to fig. 2, 3, 4, and 6, optionally, the plurality of touch electrodes 141 are arranged in a matrix; the touch electrode 141 includes a first touch electrode strip 1412 extending in a matrix row direction and a second touch electrode strip 1413 extending in a matrix column direction, and the first touch electrode strip 1412 and the second touch electrode strip 1413 intersect to form a grid shape.

Specifically, the touch metal layers shown in fig. 2 and fig. 3 are different in that the distance between adjacent touch electrodes along the matrix column direction is different, and the distance between adjacent touch electrodes can be set by a person skilled in the art according to actual situations, which is not limited herein. Similarly, along the matrix row direction, the distance between adjacent touch electrodes may also be set by those skilled in the art according to the actual situation, and is not limited herein.

Fig. 7 is a schematic structural diagram of the touch metal layer, the pixel electrode layer and the black matrix in the touch display panel shown in fig. 5. With continued reference to fig. 6 and fig. 7, optionally, the touch display panel further includes a black matrix 16, and the orthographic projection of the touch electrode 141 and the touch trace 142 on the substrate 11 falls within the orthographic projection of the black matrix 16 on the substrate 11.

Specifically, the orthographic projection of the black matrix 16 on the substrate 11 is located between the orthographic projections of the two adjacent sub-pixels on the substrate 11, and by arranging that the orthographic projections of the touch electrode 141 and the touch trace 142 on the substrate 11 both fall within the orthographic projection of the black matrix 16 on the substrate 11, the orthographic projection of the touch electrode 141 on the substrate 11 and the orthographic projection of the sub-pixels on the substrate 11 can be prevented from overlapping. Thus, the light emitted from the sub-pixels of the touch display panel does not need to pass through the touch electrode 141, and the number of the film layers through which the light passes when the light is emitted from the touch display panel can be reduced, which is beneficial to improving the penetration rate of the touch display panel.

With continued reference to fig. 5 and fig. 6, optionally, the touch display panel further includes a pixel electrode layer 17 located on a side of the gate metal layer 12 away from the substrate 11, and the pixel electrode layer 17 is provided with a plurality of pixel electrodes 143; the orthographic projections of the pixel electrodes 143 on the substrate 11 are spaced between the orthographic projections of the adjacent first touch electrode strips 1412 on the substrate 11, and the orthographic projections of the pixel electrodes 143 on the substrate 11 are spaced between the orthographic projections of the adjacent second touch electrode strips 1413 on the substrate 11.

The advantage of this configuration is that it can avoid the distance between the adjacent first touch electrode strips 1412 being too far, ensure that the first touch electrode strips 1412 and the second touch electrode strips 1413 have proper density, and further make the area of the touch electrode 141 large enough when the area occupied by the touch electrode 141 is fixed, avoid the capacitance to ground variation of the touch electrode 141 being too small when a finger touches the touch display panel due to too small area of the touch electrode 141, and ensure the touch detection accuracy.

Fig. 8 is a schematic view of another structure of the touch metal layer and the pixel electrode layer in the touch display panel shown in fig. 5. Fig. 9 is a schematic view of another structure of the touch metal layer, the pixel electrode layer and the black matrix in the touch display panel shown in fig. 5. Fig. 10 is a schematic view of another structure of the touch metal layer, the pixel electrode layer and the black matrix in the touch display panel shown in fig. 5. Referring to fig. 5 and fig. 8 to 10, optionally, the touch display panel further includes a black matrix 16 and a pixel electrode layer 17, where the pixel electrode layer 17 is located on a side of the gate metal layer 12 facing away from the substrate 11; the pixel electrode layer 17 is provided with a plurality of pixel electrodes 143, each pixel electrode 143 includes a plurality of first pixel electrode strips 1431 and a plurality of second pixel electrode strips 1432, each of the first pixel electrode strips 1431 and the second pixel electrode strips 1432 extend in the matrix column direction, and an obtuse included angle is formed between each of the first pixel electrode strips 1431 and the second pixel electrode strips 1432.

Optionally, the orthographic projection of the black matrix 16 on the substrate 11 is located between the orthographic projections of the two adjacent sub-pixels on the substrate 11, a partial number of orthographic projections of the first touch electrode bars 1412 on the substrate 11 fall within the orthographic projection of the black matrix 16 on the substrate 11, and the orthographic projections of the remaining first touch electrode bars 1412 on the substrate 11 are located between the orthographic projection of the first pixel electrode bar 1431 on the substrate 11 and the orthographic projection of the second pixel electrode bar 1432 on the substrate 11; the orthographic projection of the second touch electrode bars 1413 on the substrate 11 falls within the orthographic projection of the black matrix 16 on the substrate 11, as shown in fig. 9. Alternatively, the orthographic projection of the black matrix 16 on the substrate 11 is located between the orthographic projections of the two adjacent sub-pixels on the substrate 11, and between the orthographic projection of the first pixel electrode bar 1431 on the substrate 11 and the orthographic projection of the second pixel electrode bar 1432 on the substrate 11, and the orthographic projections of the first touch electrode bar 1412 and the second touch electrode bar 1413 on the substrate 11 both fall within the orthographic projection of the black matrix 16 on the substrate 11, as shown in fig. 10.

It can be understood that, light hardly emits at the position where the first pixel electrode strip 1431 and the second pixel electrode strip 1432 are intersected (often defined as a domain line region herein), and therefore, compared with the case where the first touch electrode strip 1412 is disposed in the middle of the first pixel electrode strip 1431 or the second pixel electrode strip 1432 (that is, the first touch electrode strip 1412 is disposed in the light emitting region), the disposing of the first touch electrode strip 1412 in the domain line region does not affect the aperture ratio of the sub-pixel, and it is also beneficial to increase the density of the first touch electrode strip 1412, so that when the area occupied by the touch electrode 141 is fixed, the area of the touch electrode 141 is sufficiently large, the change of the capacitance to ground of the touch electrode 141 when a finger touches the touch display panel due to the excessively small area of the touch electrode 141 is avoided, and the touch detection accuracy is ensured.

Optionally, the range of the distance between the adjacent first touch electrode strips 1412 in the matrix row direction is 20um to 300 um; the pitch of the adjacent second touch electrode strips 1413 along the matrix column direction ranges from 20um to 300 um. The advantage of such an arrangement is that when the area occupied by the touch electrode 141 is constant, the area of the touch electrode 141 is large enough to avoid that the capacitance variation of the touch electrode 141 to ground is too small when a finger touches the touch display panel due to too small area of the touch electrode 141, thereby ensuring the touch detection accuracy.

With continued reference to fig. 1 and fig. 5, optionally, the touch display panel further includes a source-drain metal layer 19 located between the gate metal layer 12 and the common electrode layer 13; the source-drain metal layer 19 is provided with a plurality of data lines, and the orthographic projection of the touch trace 142 on the substrate 11 falls within the orthographic projection of the data line on the substrate 11.

Specifically, the source-drain metal layer 19 may be a data line, a source and a drain of a switching transistor, and may be made of mo-al-mo, or other materials known to those skilled in the art, which is not limited herein.

The advantage of this arrangement is that the width of the black matrix 16 for shielding the touch trace 142 and the data line is small, so that the aperture ratio of the sub-pixels is large, which is beneficial to improving the display brightness.

It should be noted that, in fig. 2, fig. 3, fig. 4, and fig. 6 to fig. 10, for clearly distinguishing the touch electrode 141 and the touch trace 142, different filling patterns are used for the two, but in an actual process, the two are made of the same material in the same process.

It should be noted that fig. 1 only illustrates the substrate 11, the gate metal layer 12, the source-drain metal layer 19, the common electrode layer 13, the bridge metal layer 15, the touch metal layer 14, and the insulating layer between the metal layers, but the disclosure is not limited to the touch display panel in this application, and it may also include other film layers known to those skilled in the art. Similarly, fig. 5 only illustrates the substrate 11, the gate metal layer 12, the source-drain metal layer 19, the common electrode layer 13, the pixel electrode layer 17, the touch control metal layer 14, and the insulating layer between the metal layers, but the touch control display panel is not limited in this application, and may also include other film layers known to those skilled in the art.

Based on the above inventive concept, the embodiment of the present invention further provides a display device, which includes the touch display panel according to any one of the above embodiments. Therefore, the display device also has the beneficial effects of the touch display panel provided by the embodiment of the invention, and the same points can be understood by referring to the above description, and the details are not repeated hereinafter. Illustratively, the display device may be any electronic device with a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, or a television.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A touch display panel, comprising:

the semiconductor device comprises a substrate and a grid metal layer arranged on the substrate;

the common electrode layer is positioned on one side, away from the substrate, of the grid metal layer; a common electrode is arranged on the common electrode layer and is a whole-surface electrode;

the touch metal layer is positioned on one side of the common electrode layer, which is far away from the substrate; the touch metal layer is provided with a plurality of touch electrodes and a plurality of touch wires, the touch electrodes are electrically connected with the touch wires in a one-to-one correspondence manner, and the touch electrodes are in a grid shape; the at least one touch electrode comprises at least two sub-touch electrodes, and the touch routing of other touch electrodes is arranged between every two adjacent sub-touch electrodes;

a plurality of bridges electrically connecting the sub-touch electrodes of the same touch electrode.

2. The touch display panel according to claim 1, further comprising:

the bridge-crossing metal layer is positioned on one side of the touch metal layer, which is far away from the common electrode layer, or is positioned on one side of the touch metal layer, which is far towards the common electrode layer; the plurality of bridge spans are located in the bridge span metal layer.

3. The touch display panel according to claim 1, further comprising:

the pixel electrode layer is positioned on one side, facing the common electrode layer, of the touch metal layer; the pixel electrode layer is provided with a plurality of pixel electrodes, and the plurality of bridge spans are positioned on the pixel electrode layer.

4. The touch display panel according to claim 1, wherein the touch electrodes are arranged in a matrix;

the touch electrodes comprise first touch electrode strips extending along the matrix row direction and second touch electrode strips extending along the matrix column direction, and the first touch electrode strips and the second touch electrode strips form a grid shape in a crossed mode.

5. The touch display panel according to claim 4, wherein the pitch of adjacent first touch electrode stripes along the matrix row direction is in a range of 20um to 300 um; and the range of the distance between the adjacent second touch electrode strips along the direction of the matrix column is 20um-300 um.

6. The touch display panel according to claim 4, wherein the touch display panel further comprises a black matrix, and an orthographic projection of the touch electrodes and the touch traces on the substrate falls within an orthographic projection of the black matrix on the substrate.

7. The touch display panel according to claim 6, further comprising a pixel electrode layer on a side of the gate metal layer facing away from the substrate, the pixel electrode layer being provided with a plurality of pixel electrodes;

the orthographic projections of the pixel electrodes on the substrate are spaced between the orthographic projections of the adjacent first touch electrode strips on the substrate, and the orthographic projections of the pixel electrodes on the substrate are spaced between the orthographic projections of the adjacent second touch electrode strips on the substrate.

8. The touch display panel according to claim 4, further comprising a black matrix and a pixel electrode layer on a side of the gate metal layer facing away from the substrate;

the pixel electrode layer is provided with a plurality of pixel electrodes, each pixel electrode comprises a plurality of first pixel electrode strips and a plurality of second pixel electrode strips, the first pixel electrode strips and the second pixel electrode strips extend along the direction of the matrix array, and obtuse included angles are formed between the first pixel electrode strips and the second pixel electrode strips;

the orthographic projection of a partial number of the first touch electrode bars on the substrate falls within the orthographic projection of a black matrix on the substrate, and the orthographic projection of the rest of the first touch electrode bars on the substrate is positioned between the orthographic projection of the first pixel electrode bars on the substrate and the orthographic projection of the second pixel electrode bars on the substrate;

the orthographic projection of the second touch electrode strips on the substrate falls within the orthographic projection of the black matrix on the substrate.

9. The touch display panel according to claim 1, further comprising a source drain metal layer located between the gate metal layer and the common electrode layer;

the source-drain metal layer is provided with a plurality of data lines, and the orthographic projection of the touch wiring on the substrate falls in the orthographic projection of the data lines on the substrate.

10. A display device comprising the touch display panel according to any one of claims 1 to 9.

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