Patent Description:
With the continuous development of touch technology, smart electronic products such as mobile phones and tablet computers are integrated with touch substrates with touch functions. On the other hand, with the development of the market, smart electronic products such as mobile phones and tablet computers gradually adopt designs of narrow bezel or even bezel less, that is, "full screen" design, so as to provide a better experience for users.

<CIT> provides a touch display panel, which includes a display area and a non-display area located around the display area. The display area is formed with a special-shaped area, which includes but is not limited to a notch. A plurality of first touch electrodes are arranged in the display area, and these first touch electrodes can be arranged in sequence along the first direction. A special-shaped touch electrode is adjacent to the cut-out notch portion of the touch display panel, and compared with the complete touch electrode, the special-shaped touch electrode has some electrode missing in the middle position. The touch display panel also includes a first touch trace, which includes a plurality of connecting parts and conductive traces, the connecting parts are arranged at intervals and connected with the irregular touch electrodes, and the conductive traces are connected with the connecting parts at both sides of the notch, so as to ensure the continuity of the horizontal touch channel.

At least one embodiment of the present disclosure relates to a touch substrate and a touch display device. The touch substrate adopts a bridge-connection design in the rounded-corner region to connect a second rounded-corner touch electrode extending into the rounded-corner region with a first extension portion of a corresponding touch-sensing connection line. Besides, the touch substrate can also prevent signal interference between the touch-sensing connection line and the touch-driving connection line by providing a shielding line, so as to avoid affecting the touch performance.

At least one embodiment of the present disclosure provides a touch substrate, which includes a base substrate; a plurality of first touch electrodes disposed on the base substrate and arranged in a first direction; and a plurality of second touch electrodes disposed on the base substrate and arranged in a second direction, the touch substrate includes a touch region and a peripheral region located at a periphery of the touch region, and the touch region includes a rounded-corner region, the plurality of first touch electrodes include at least one first rounded-corner touch electrode extending into the rounded-corner region, the touch substrate further includes a touch-driving connection line connected with each of the at least one first rounded-corner touch electrode, the plurality of second touch electrodes include at least one second rounded-corner touch electrode extending into the rounded-corner region, the touch substrate further includes a touch-sensing connection line connected with each of the at least one second rounded-corner touch electrode, the touch-sensing connection line includes a first U-shaped bent portion and a first extension portion extending in the second direction, the first U-shaped bent portion includes a first bent portion, a second bent portion, and a first connection portion, the first bent portion is electrically connected with the second rounded-corner touch electrode and located at a side of the touch-driving connection line close to the touch region, the second bent portion is connected with the first extension portion and located at a side of the touch-driving connection line away from the touch region, and the first connection portion connects the first bent portion with the second bent portion, and the first connection portion and the touch-driving connection line are overlapped with each other in a direction perpendicular to the base substrate, and, in an overlap region of the first connection portion and the touch-driving connection line, the first connection portion and the touch-driving connection line are arranged in different layers.

For example, in the touch substrate provided by an embodiment of the present disclosure, the touch-sensing connection line further includes: an interconnection line electrically connecting the first bent portion and the second rounded-corner touch electrode.

For example, the touch substrate provided by an embodiment of the present disclosure further includes a first shielding line, including a second U-shaped bent portion and a second extension portion, the second U-shaped bent portion includes a third bent portion located between the first bent portion and the touch-driving connection line, a fourth bent portion located at a side of the touch-driving connection line away from the first bent portion, and a second connection portion connecting the third bent portion with the fourth bent portion, the second connection portion and the touch-driving connection line are overlapped with each other and are insulated from each other, and the second U-shaped bent portion is located in a region enclosed by the first bent portion, the second bent portion, and the first connection portion, the first connection portion and the second connection portion are substantially parallel with each other, the second U-shaped bent portion and the first U-shaped bent portion have a same opening direction.

For example, the touch substrate provided by an embodiment of the present disclosure further includes a second shielding line, an orthographic projection of the second shielding line on the base substrate is located between an orthographic projection of the first shielding line on the base substrate and an orthographic projection of the second bent portion on the base substrate.

For example, in the touch substrate provided by an embodiment of the present disclosure, the first bent portion is substantially parallel with an outer edge of the rounded-corner region, and the second bent portion is substantially parallel with an outer edge of the rounded-corner region.

For example, in the touch substrate provided by an embodiment of the present disclosure, the touch-driving connection line includes a first touch-driving connection sub-line located at a side of the second connection portion away from the first connection portion and a second touch-driving connection sub-line located at a side of the first connection portion away from the second connection portion, and the touch substrate further includes a bridge portion connecting the first touch-driving connection sub-line with the second touch-driving connection sub-line.

For example, in the touch substrate provided by an embodiment of the present disclosure, the first shielding line further includes: a third extension portion extending substantially in the second direction; a third connection portion arranged in a layer different from the first connection portion; a first through-hole connection portion connecting the third connection portion with the third extension portion; and a second through-hole connection portion connecting the third connection portion with the fourth bent portion, the third connection portion is located in a first conductive layer, the third extension portion and the fourth bent portion are located in a second conductive layer, and an insulation layer is provided between the first conductive layer and the second conductive layer, and the first through-hole connection portion and the second through-hole connection portion are provided in the insulation layer.

For example, in the touch substrate provided by an embodiment of the present disclosure, an orthographic projection of the third connection portion on the base substrate is overlapped with an orthographic projection of the fourth bent portion on the base substrate and an orthographic projection of the third extension portion on the base substrate, respectively.

For example, in the touch substrate provided by an embodiment of the present disclosure, the bridge portion includes: a fourth connection portion arranged in a layer different from the first connection portion; a third through-hole connection portion connecting the fourth connection portion with the first touch-driving connection sub-line; and a fourth through-hole connection portion connecting the four connection portion with the second touch-driving connection sub-line, the fourth connection portion is located in the first conductive layer, the first touch-driving connection sub-line and the second touch-driving connection sub-line are located in the second conductive layer, and an insulation layer is provided between the first conductive layer and the second conductive layer, and the third through-hole connection portion and the fourth through-hole connection portion are arranged in the insulation layer.

For example, in the touch substrate provided by an embodiment of the present disclosure, an orthographic projection of the fourth connection portion on the base substrate is overlapped with an orthographic projection of the first touch-driving connection sub-line on the base substrate and an orthographic projection of the second touch-driving connection sub-line on the base substrate, respectively.

For example, in the touch substrate provided by an embodiment of the present disclosure, a center of the second through-hole connection portion and a center of the third through-hole connection portion are staggered in the second direction.

For example, the touch substrate provided by an embodiment of the present disclosure further includes: a ground line located at a side of the second bent portion away from the touch region.

For example, in the touch substrate provided by an embodiment of the present disclosure, the base substrate is a cover plate of a display panel or an encapsulation layer of a display panel.

For example, in the touch substrate provided by an embodiment of the present disclosure, the first touch electrode is a touch-driving electrode, and the second touch electrode is a touch-sensing electrode.

For example, the touch substrate provided by an embodiment of the present disclosure further includes: a bonding region, the rounded-corner region is located at a corner of the touch region close to the bonding region.

At least one embodiment of the present disclosure provides a touch display device, including the abovementioned touch substrate.

In order to more clearly illustrate the technical solution of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described in the following. It is obvious that the described drawings below are only related to some embodiments of the present disclosure without constituting any limitation thereto.

In order to make objectives, technical details and advantages of the embodiments of the present disclosure more clearly, the technical solutions of the embodiments will be described in a clearly and fully understandable way in connection with the drawings related to the embodiments of the present disclosure. Apparently, the described embodiments are just a part but not all of the embodiments of the present disclosure. Based on the described embodiments herein, those skilled in the art can obtain other embodiment(s), without any inventive work, which should be within the scope of the present disclosure.

Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first," "second," etc., which are used in the present disclosure, are not intended to indicate any sequence, amount or importance, but distinguish various components. Also, the terms "include," "including," "include," "including," etc., are intended to specify that the elements or the objects stated before these terms encompass the elements or the objects and equivalents thereof listed after these terms, but do not preclude the other elements or objects. The phrases "connect", "connected", etc., are not intended to define a physical connection or mechanical connection, but may include an electrical connection, directly or indirectly.

At present, in order to retain a front camera or other sensors while increasing a screen-to-body ratio, a notch is required at an upper edge of the touch substrate. In this way, a notched region is formed due to the notch is provided at the upper edge of the touch substrate, and a touch electrode pattern will be separated at the notched region as mentioned above, a particular design is required to connect parts of the touch electrode at both sides of the notched region, and to reasonably arrange lines (wires) of the touch electrodes.

On the other hand, the touch substrate usually adopts a rounded corner, and a touch-sensing electrode will be cut at a position of the rounded corner. As a result, the touch electrode at the position of the rounded corner needs to be connected with a corresponding connection line of the touch electrode by a bridge.

In this regard, embodiments of the present disclosure provide a touch substrate and a touch display device. The touch substrate includes: a base substrate; a plurality of first touch electrodes disposed on the base substrate and arranged in a first direction; a plurality of second touch electrodes disposed on the base substrate and arranged in a second direction; the touch substrate includes a touch region and a notched region located at an edge of the touch region in the second direction, the plurality of first touch electrodes include at least one first notch touch electrode extending towards the notched region, the touch substrate further includes a touch-driving connection line connected with each of the at least one first notch touch electrode, the plurality of second touch electrodes includes at least one second separated touch electrode separated at the notched region, and each second separated touch electrode includes a first sub-portion and a second sub-portion located at both sides of the notched region, respectively. The touch substrate further includes a bridge line that extends along an edge of the notched region close to the touch region and connects the first sub-portion with the second sub-portion. At least one touch-driving connection line extends along the edge of the notched region close to the touch region and extends to an edge of the notched region away from the touch region. The touch substrate further includes a shielding line, an orthographic projection of the shielding line on the base substrate is located between an orthographic projection of the bridge line on the base substrate and an orthographic projection of the touch-driving connection line on the base substrate. The touch substrate can electrically connect the first sub-portion with the second sub-portion that are of the second separated touch electrode and are separated at the notched region by arranging the above-mentioned bridge line; on the other hand, in the touch substrate, by providing a shielding line between the bridge line and the touch-driving connection line, a signal interference between the bridge line and the touch-driving connection line can be prevented, so as not to affect the touch performance.

On the other hand, the embodiments of the present disclosure further provide a touch substrate and a touch display device. The touch substrate includes a base substrate; a plurality of first touch electrodes disposed on the base substrate and arranged in a first direction; and a plurality of second touch electrodes disposed on the base substrate and arranged in a second direction; the touch substrate includes a touch region and a peripheral region located at a periphery of the touch region, and the touch region includes a rounded-corner region, the plurality of first touch electrodes include at least one first rounded-corner touch electrode extending into the rounded-corner region, the touch substrate further includes a touch-driving connection line connected with each of the at least one first rounded-corner touch electrode, the plurality of second touch electrodes include at least one second rounded-corner touch electrode extending into the rounded-corner region, the touch substrate further includes a touch-sensing connection line connected with each of the at least one second rounded-corner touch electrode, the touch-sensing connection line includes a first U-shaped bent portion and a first extension portion extending in the second direction, the first U-shaped bent portion includes a first bent portion, a second bent portion, and a first connection portion, the first bent portion is electrically connected with the second rounded-corner touch electrode and located at a side of the touch-driving connection line close to the touch region, the second bent portion is connected with the first extension portion and located at a side of the touch-driving connection line away from the touch region, and the first connection portion connects the first bent portion with the second bent portion, and the first connection portion and the touch-driving connection line are overlapped with each other in a direction perpendicular to the base substrate, and the first connection portion and the touch-driving connection line are arranged in different layers in an overlap region of the first connection portion and the touch-driving connection line. Therefore, the touch substrate adopts a bridge in the rounded-corner region to connect the second rounded-corner touch electrode extending into the rounded-corner region with the first extension of a corresponding touch-sensing connection line.

Hereinafter, the touch substrate and the touch display device provided by the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

<FIG> is a schematic plan view of a touch substrate provided by an embodiment of the present disclosure; <FIG> is an enlarged schematic view of a touch substrate illustrated in <FIG> and provided by an embodiment of the present disclosure at a position enclosed by a dashed line. As illustrated in <FIG>, the touch substrate <NUM> includes a base substrate <NUM>, and a plurality of first touch electrodes <NUM> and a plurality of second touch electrodes <NUM> that are disposed on the base substrate <NUM>. The plurality of first touch electrodes <NUM> are arranged in a first direction X; the plurality of second touch electrodes <NUM> are arranged in a second direction Y. The touch substrate <NUM> includes a touch region <NUM> and a notched region <NUM> located at an edge <NUM> of the touch region <NUM> in the second direction Y, and the plurality of first touch electrodes <NUM> include at least one first notch touch electrode <NUM> extending towards the notched region <NUM>, the touch substrate <NUM> further includes a touch-driving connection line <NUM> connected with each first notch touch electrode <NUM>. For example, <FIG> illustrates four first notch touch electrodes <NUM>. It should be explained that the first notch touch electrode <NUM> refers to the first touch electrode <NUM> that extends from the touch region <NUM> towards the notched region <NUM> in the second direction; for simplicity, <FIG> only illustrates two touch-driving connection line, each of the first notch touch electrodes of the touch substrate provided by the embodiment of the present disclosure can be connected with a touch-driving connection line. It should be explained that each first touch electrode is a touch electrode extending in the second direction, and the plurality of first touch electrodes are arranged in the first direction; each second touch electrode is a touch electrode extending in the first direction, and the plurality of second touch electrodes are arranged in the second direction. In addition, the first direction and the second direction as mentioned above are two directions located in a plane of the touch substrate and are intersected with each other, for example, are perpendicular to each other.

As illustrated in <FIG>, the plurality of second touch electrodes <NUM> include at least one second separated touch electrode <NUM> that is separated at the notched region <NUM>, and each second separated touch electrode <NUM> includes a first sub-portion <NUM> and a second sub-portion <NUM> that are located at both sides of the notched region <NUM>, respectively. The touch substrate <NUM> further includes a bridge line <NUM>, which extends at least partially along an edge <NUM> of the notched region <NUM> close to the touch region <NUM> and connects the first sub-portion <NUM> with the second sub-portion <NUM>, and at least one touch-driving connection line <NUM> extends along the edge <NUM> of the notched region <NUM> close to the touch region <NUM> and extends to an edge <NUM> of the notched region <NUM> away from the touch region <NUM>. The touch substrate <NUM> further includes a shielding line (guard line) <NUM>, an orthographic projection of at least a part of the shielding line <NUM> on the base substrate <NUM> is located between orthographic projections of the bridge line <NUM> and the touch-driving connection line <NUM> on the base substrate <NUM>. It should be explained that the above-mentioned first touch electrode may be a touch-driving electrode, and the above-mentioned second touch electrode may be a touch-sensing electrode; of course, the embodiments of the present disclosure include, but are not limited thereto, the above-mentioned first touch electrode may also be a touch-sensing electrode, and the above-mentioned second touch electrode may also be a touch-driving electrode.

The touch substrate provided by this embodiment can enable the first sub-portion and the second sub-portion of the second separated touch electrode that are separated at the notched region to be electrically connected by providing the bridge line mentioned above. On the other hand, the touch substrate can prevent from signal interference between the bridge line and the touch-driving connection line by providing a shielding line between the bridge line and the touch-driving connection line, thereby avoiding an influence on touch performance.

It should be noted that, the touch-driving connection line and the bridge line are adjacent to each other, and a TX signal on the touch-driving connection line and a RX signal on the bridge line have a potential difference. Due to the existence of coupling capacitance, the problem of the TX signal charge escape will be caused, and then the signal-to-noise ratio will be reduced. In the present disclosure, the shielding line (guard line) is provided between the touch-driving connection line and the bridge line, and the shielding line can be applied with a guard signal, the guard signal is an AC signal (square wave), which is the same as the TX signal applied to the touch-driving connection line. In this way, the potential difference between TX signal and guard signal is always <NUM>, so the signal-to-noise ratio is prevented from being reduced due to charge escape distortion, which plays a role in shielding interference and improving the signal-to-noise ratio.

In some exemplary embodiments, as illustrated in <FIG>, because three sides of the notched region are all surrounded by the touch region, the edge <NUM> of the above notched region <NUM> close to the touch region <NUM> is the three sides of the notched region <NUM> surrounded by the touch region <NUM>. That is, the notched region <NUM> is surrounded only by the edge <NUM> of the notched region <NUM> close to the touch region <NUM> and the edge <NUM> of the notched region <NUM> away from the touch region <NUM>.

For example, as illustrated in <FIG>, the touch region <NUM> and the notched region <NUM> of the touch substrate <NUM> may constitute a rectangular region. For example, as illustrated in <FIG>, a shape of the notched region <NUM> may be a rounded rectangle with two rounded corners close to the touch region <NUM>.

For example, as illustrated in <FIG>, the first touch electrode <NUM> and the second touch electrode <NUM> may be made of the same conductive layer. For example, the second touch electrode <NUM> may be a continuous electrode extending in the first direction, and the first touch electrode <NUM> may include a plurality of block-shaped electrodes separated by the second touch electrodes <NUM> and an electrode bridged structure configured to connect adjacent block-shaped electrodes. Of course, the embodiments of the present disclosure include but are not limited thereto, and a layout of the first touch electrode and the second touch electrode may refer to a common design.

For example, the first touch electrode <NUM> and the second touch electrode <NUM> may be made of a metal material, or a conductive metal oxide such as indium tin oxide.

For example, as illustrated in <FIG>, the touch substrate <NUM> further includes: a ground line <NUM> located at a side of the bridge line <NUM> away from the touch region <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, the bridge line <NUM> includes a bridge main body portion <NUM> and first U-shaped bent portions <NUM> located at both ends of the bridge main body portion <NUM>, respectively; the first U-shaped bent portion <NUM> is electrically connected with the first sub- portion <NUM> or the second sub-portion <NUM>. The first U-shaped bent portion <NUM> includes a first bent portion <NUM> extending substantially in the second direction, a second bent portion <NUM> extending substantially in the second direction, a first bent portion <NUM> extending substantially in the first direction, and a first connection portion <NUM> that extends substantially in the first direction the portion <NUM> and connects the first bent portion <NUM> with the second bent portion <NUM>, the first bent portion <NUM> is electrically connected with the first sub-portion <NUM> or the second sub-portion <NUM>. In other words, a portion of the bridge line <NUM> that is electrically connected with the first sub-portion <NUM> or the second part <NUM> is the first U-shaped bent portion <NUM>. The first bent portion <NUM> can enhance stability of a connection between the bridge line <NUM> and the first sub-portion <NUM> or between the bridge line <NUM> and the second sub-portion <NUM>, and reduce a connection resistance. It should be explained that the aforementioned "extending substantially in the second direction" includes the case of strictly extending in the second direction, and also the case where an angle between the extending direction and the second direction is less than or equal to <NUM> degrees.

In some exemplary embodiments, as illustrated in <FIG>, an orthographic projection of the first bent portion <NUM> on the base substrate <NUM> is at least partially overlapped with an orthographic projection of the first sub-portion <NUM> or the second sub-portion <NUM> on the base substrate <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, the two first U-shaped bent portions <NUM> located at both ends of the bridge line <NUM> are axially symmetrical with respect to a perpendicular bisector of the bridge line <NUM>. For example, as illustrated in <FIG>, the first sub-portion <NUM> or the second sub-portion <NUM> of the second separated touch electrode <NUM> is arranged in a layer different from the first bent portion <NUM>. An insulation layer (not illustrated in <FIG>) may be provided between the first sub-portion <NUM> and the first bent portion <NUM> or between the second sub-portion <NUM> and the first bent portion <NUM>. In this case, the first sub-portion <NUM> or the second sub-portion <NUM> can be electrically connected with the first bent portion <NUM> by a connection via structure <NUM>. It should be explained that the connection via structure <NUM> may include a via hole in the insulation layer and a conductive structure in the via hole. A structure of the connection via structure is not particularly limited in the embodiments of the present disclosure.

In some exemplary embodiments, as illustrated in <FIG>, the second bent portion <NUM> connected with the bridge main body portion <NUM> may include two portions that are located in a first conductive layer and a second conductive layer respectively and are electrically connected with each other. Similarly, the bridge main body portion <NUM> also includes two portions that are located in a first conductive layer and a second conductive layer respectively and are electrically connected with each other, that is, the bridge main body portion <NUM> may have a double-layer structure.

In some exemplary embodiments, as illustrated in <FIG>, in the case where the bridge line <NUM> includes the first U-shaped bent portion <NUM>, the shielding line <NUM> includes a shielding main body portion <NUM> and second U-shaped bent portions <NUM> located at both ends of the shielding main body portion <NUM>. The second U-shaped bent portion <NUM> includes a third bent portion <NUM> that extends substantially in the second direction, a fourth bent portion <NUM> that extends substantially in the second direction, and a fourth bent portion <NUM> that extends substantially in the first direction and a second connection portion <NUM> that extends substantially in the first direction and connects the third bent portion <NUM> and the fourth bent portion <NUM>, the second U-shaped bent portion <NUM> is located at a region enclosed by the first bent portion <NUM>, the second bent portion <NUM> and the first connection portion <NUM>. The first connection portion <NUM> is substantially parallel with the second connection portion <NUM>. An opening direction of the second U-shaped bent portion <NUM> and an opening direction of the first U-shaped bent portion <NUM> are the same. Therefore, in the case where the bridge line <NUM> includes the first U-shaped bent portion <NUM>, the shielding line <NUM> provided with the second U-shaped bent portion <NUM> can better prevent signal interference between the bridge line and the touch-driving connection line, so as not to affect the touch performance.

In some exemplary embodiments, as illustrated in <FIG>, because the touch-driving connection line <NUM> extends along the edge <NUM> of the notched region <NUM> close to the touch region <NUM> and extends to the edge <NUM> of the notched region <NUM> away from the touch region <NUM>, the touch-driving connection line <NUM> is overlapped with the first U-shaped bent portion <NUM>. In this case, in the region enclosed by the first U-shaped bent portion <NUM>, an orthographic projection of the touch-driving connection line <NUM> on the base substrate <NUM> is located between an orthographic projection of the third bent portion <NUM> on the base substrate <NUM> and an orthographic projection of the fourth bent portion <NUM> on the base substrate <NUM>, and is overlapped with orthographic projections of the first connection portion <NUM> and the second connection portion <NUM> on the base substrate <NUM>, respectively. In this way, the third bent portion <NUM> of the shielding line <NUM> can better prevent signal interference between the touch-driving connection line <NUM> and the first bent portion <NUM> of the bridge line <NUM>, and the fourth bent portion of the shielding line <NUM><NUM> can better prevent signal interference between the touch-driving connection line <NUM> and the second bent portion <NUM> of the bridge line <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, in an overlap region between the touch-driving connection line <NUM> and the first U-shaped bent portion <NUM> and an overlap region between the touch-driving connection line <NUM> and the second U-shaped bent portion <NUM>, the touch-driving connection line <NUM> includes a first touch-driving connection sub-line <NUM> and a second touch-driving connection sub-line <NUM> that are located at both sides of a whole structure consisted of the first connection portion <NUM> and the second connection portion <NUM>. For example, as illustrated in <FIG>, the touch-driving connection line <NUM> includes a first touch-driving connection sub-line <NUM> located at a side of the second connection portion <NUM> away from the first connection portion <NUM> and a second touch-driving connection sub-line <NUM> located at a side of the first connection portion <NUM> away from the second connection portion <NUM>. The touch substrate <NUM> includes a bridge portion <NUM> connecting the first touch-driving connection sub-line <NUM> with the second touch-driving connection sub-line <NUM>. Thus, by providing the bridge portion <NUM>, the touch-driving connection line <NUM> can go across the first connection portion <NUM> and the second connection portion <NUM>, and can effectively prevent from signal interference to touch-driving connection line <NUM> caused by the first connection portion <NUM> and the second connection portion <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, the shielding line <NUM> further includes an L-shaped bent portion <NUM> located at a side of the first connection portion <NUM> away from the second connection portion <NUM>. The L-shaped bent portion <NUM> includes a first extension portion <NUM> extending substantially in the direction and a second extension portion <NUM> that is connected with the first extension portion <NUM> and extends substantially in the second direction. The first touch-driving connection sub-line <NUM> is located at a side of the second connection portion <NUM> away from the first connection portion <NUM>, the first extension portion <NUM> is located between the first connection portion <NUM> and the second touch-driving connection sub-line <NUM>, and the second extension portion <NUM> is substantially parallel with the second touch-driving sub-line <NUM>. Therefore, the L-shaped bent portion <NUM> can effectively prevent from signal interference between the second touch-driving connection sub-line <NUM> of the touch-driving connection line <NUM> and the bridge line <NUM>.

<FIG> is a schematic cross-sectional view of a touch substrate illustrated in <FIG> taken along line AA and provided by an embodiment of the present disclosure. <FIG> is a schematic cross-sectional view of a touch substrate illustrated in <FIG> taken along line BB and provided by an embodiment of the present disclosure. As illustrated in <FIG>, <FIG>, the first connection portion <NUM> and the second connection portion <NUM> may be arranged in the same layer. The bridge portion <NUM> includes a first through-hole connection portion <NUM>, a second through-hole connection portion <NUM>, and a third connection portion <NUM>. The third connection portion <NUM> is arranged in a layer different from the first connection portion <NUM>, the second connection portion <NUM>, the first touch-driving connection sub-line <NUM>, and the second touch-driving connection sub-line <NUM>. The first through-hole connection portion <NUM> connects the third connection portion <NUM> with the first touch-driving connection sub-line <NUM>. The second through-hole connection portion <NUM> connects the third connection portion <NUM> with the second touch-driving connection sub-line <NUM>. An insulation layer <NUM> is provided between the third connection portion <NUM> and the first connection portion <NUM>. Due to the insulation effect of the insulation layer <NUM>, a parasitic capacitance of a capacitor formed between the third connection portion <NUM> and the first connection portion <NUM> is relatively small, so that a signal interference between the third connection portion <NUM> and the first connection portion <NUM> is weaker, has less influence on touch effect.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, the third connection portion <NUM> is located in a first conductive layer, that is, the third connection portion <NUM> is a part of the first conductive layer. The first touch-driving connection sub-line <NUM> and the second touch-driving connection sub-line <NUM> are located in a second conductive layer, that is, the first touch-driving connection sub-line <NUM> and the second touch-driving connection sub-line <NUM> are parts of the second conductive layer, respectively. An insulation layer <NUM> is disposed between the first conductive layer and the second conductive layer, and the first through-hole connection portion <NUM> and the second through-hole connection portion <NUM> are disposed in the insulation layer <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, an orthographic projection of the third connection portion <NUM> on the base substrate <NUM> is overlapped with an orthographic projection of the first touch-driving connection sub-line <NUM> on the base substrate <NUM> and an orthographic projection of the second touch-driving connection sub-line <NUM> on the base substrate <NUM>, respectively.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, the shielding line <NUM> further includes: a fourth connection portion <NUM> that is provided in the same layer as the third connection portion <NUM>; a third through-hole connection portion <NUM> that connects the fourth connection portion <NUM> with the fourth bent portion <NUM>; and a fourth through-hole connection portion <NUM> that connects the fourth connection portion <NUM> with the second extension portion <NUM>. The fourth connection portion <NUM> is located in the first conductive layer, and the third bent portion <NUM>, the second connection portion <NUM>, the fourth bent portion <NUM>, the first extension portion <NUM>, and the second extension portion <NUM> are located in the second conductive layer. The third through-hole connection portion <NUM> and the fourth through-hole connection portion <NUM> are provided in the insulation layer.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, a center of the first through-hole connection portion <NUM> and a center of the third through-hole connection portion <NUM> are staggered in the second direction, that is, an orthographic projection of a center of the first through-hole connection portion <NUM> on the second direction is not overlapped with an orthographic projection of a center of the third through-hole connection portion <NUM> on the second direction. Thus, when forming the second through-hole connection portion and the third through-hole connection portion as described above, various defects caused by a small distance between a hole position of the second through-hole connection portion and a hole position of the third through-hole connection portion can be avoided.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, an orthographic projection of the fourth connection portion <NUM> on the base substrate <NUM> is overlapped with an orthographic projection of the fourth bent portion <NUM> on the base substrate <NUM> and an orthographic projection of the second extension portion <NUM> on the base substrate <NUM>, respectively.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, the first bent portion <NUM>, the second bent portion <NUM>, and the first connection portion <NUM> are located in the second conductive layer.

For example, as illustrated in <FIG>, in the touch substrate, the second separated touch electrode <NUM> can be formed by a conductive layer, that is, the second touch electrode <NUM> can be formed by a conductive layer; the aforementioned first U-shaped bent portion <NUM> and the second U-shaped bent portion <NUM> may be formed by using another conductive layer. In this case, the bridge line <NUM> may include a bridge sub-line <NUM> located at a side of the first connection portion <NUM> away from the second connection portion <NUM>. The bridge sub-line <NUM> and the second separated touch electrode <NUM> are arranged in the same layer, and an orthographic projection of the bridge sub-line <NUM> on the base substrate <NUM> is at least partially overlapped with an orthographic projection of the second bent portion <NUM> on the base substrate <NUM>, and the bridge sub-line <NUM> and the second bent portion <NUM> are electrically connected by the connection via structure <NUM>, thereby reducing a resistance of the bridge line <NUM>. Similarly, the shielding line <NUM> includes a first bridge sub-line <NUM> and a second bridge sub-line <NUM> that are located at a side of the first connection portion <NUM> away from the second connection portion <NUM>, the first sub-bridge line <NUM> and the second bridge sub-line <NUM> are arranged in the same layer as the second separated touch electrode <NUM>. The orthographic projection of the first bridge sub-line <NUM> on the base substrate <NUM> is at least partially overlapped with the orthographic projection of the third bent portion <NUM> on the base substrate <NUM>, and the first bridge sub-line <NUM> and the third bent portion <NUM> are electrically connected by the connection via structure <NUM>, thereby reducing a resistance of the shielding line <NUM>; the orthographic projection of the second bridge sub-line <NUM> on the base substrate <NUM> is at least partially overlapped with the orthographic projection of the fourth bent portion <NUM> on the base substrate <NUM>, and the second bridge sub-line <NUM> and the fourth bent portion <NUM> are electrically connected by the connection via structure <NUM>, thereby reducing a resistance of the shielding line <NUM>. It should be explained that the aforementioned second bridge sub-line <NUM> may be a part of the aforementioned fourth connection portion <NUM>. It should be explained that the centers of the above-mentioned connection via structure can all be staggered in the second direction, so as to avoid various defects caused by a small distance between via holes.

For example, as illustrated in <FIG>, in the touch substrate, the second separated touch electrode <NUM> may be formed by using the first conductive layer close to the base substrate <NUM>, and the above-mentioned first U-shaped bent portion <NUM> and second U The bent portion <NUM> may be formed by using a second conductive layer located on the first conductive layer away from the base substrate <NUM>. In other words, the aforementioned first U-shaped bent portion <NUM> and the second U-shaped bent portion <NUM> are located at a side of the second separated touch electrode <NUM> away from the base substrate. However, the embodiments of the present disclosure include but are not limited thereto. The aforementioned first U-shaped bent portion <NUM> and the second U-shaped bent portion <NUM> may also be located at a side of the second separated touch electrode <NUM> close to the base substrate.

In some exemplary embodiments, the base substrate <NUM> is a cover plate of a display panel or an encapsulation layer of a display panel. In other words, the display panel may be integrated with the touch substrate, thereby having both touch function and display function.

For example, in the case where the display panel is an organic light-emitting diode (OLED) display panel, the base substrate may be a cover plate or an encapsulation layer of the display panel.

An embodiment of the present disclosure further provides a touch display device. <FIG> is a schematic diagram of a touch display device provided by an embodiment of the present disclosure. As illustrated in <FIG>, the touch display device <NUM> includes the aforementioned touch substrate <NUM>. Therefore, the display device has the same or similar beneficial technical effects as those of the above-mentioned organic light-emitting diode display substrate. For details, please refer to the related description of the embodiment illustrated in <FIG>, without repeated here.

In some exemplary embodiments, the touch display device <NUM> further includes a substrate <NUM>, a light-emitting element <NUM> on the substrate <NUM>, and an encapsulation layer <NUM> at a side of the light-emitting element <NUM> away from the substrate <NUM>. The aforementioned touch substrate <NUM> is directly disposed on the encapsulation layer <NUM>, so that a thickness of the touch display device can be reduced, and the touch display device can be made lighter and thinner. On the other hand, by directly disposing the aforementioned touch substrate on the encapsulation layer, the touch display device can also be applicable to foldable and bendable electronic products.

For example, the light-emitting element <NUM> may be an organic light-emitting diode (OLED) light-emitting element.

In some exemplary embodiments, the notched region <NUM> is provided with one or more selected from the group consisted of a camera, a speaker, and an infrared sensor, so that the touch display device can achieve a larger screen-to-body ratio.

In some exemplary embodiments, the display device may be an electronic product with a display function such as a mobile phone, a notebook computer, a tablet computer, a navigator, and an electronic photo frame.

<FIG> is a schematic plan view of another touch substrate provided by an embodiment of the present disclosure. <FIG> is a schematic enlarged diagram of a touch substrate illustrated in <FIG> at a position of a dashed border and provided by an embodiment of the present disclosure. <FIG> is a schematic enlarged diagram of another touch substrate provided illustrated in <FIG> at a position of a dashed border and provided by an embodiment of the present disclosure.

As illustrated in <FIG>, <FIG>, the touch substrate <NUM> includes a base substrate <NUM>, and a plurality of first touch electrodes <NUM> and a plurality of second touch electrodes <NUM> that are disposed on the base substrate <NUM>. The plurality of first touch electrodes <NUM> are arranged in the first direction X; the plurality of second touch electrodes <NUM> are arranged in the second direction Y. The touch substrate <NUM> includes a touch region <NUM> and a peripheral region <NUM> located at a periphery of the touch region <NUM>. The touch region <NUM> includes a rounded-corner region <NUM>. The plurality of first touch electrodes <NUM> include at least one rounded-corner touch electrode <NUM> extending into the rounded-corner region <NUM>. The touch substrate <NUM> further includes a touch-driving connection line <NUM> connected with each of the at least one first rounded-corner touch electrode <NUM>. The plurality of second touch electrodes <NUM> include at least one second rounded-corner touch electrode <NUM> that extends to the rounded-corner region <NUM>. The touch substrate <NUM> further includes a touch-sensing connection line <NUM> connected with each second rounded-corner touch electrode <NUM>. The touch-sensing connection line <NUM> includes a first U-shaped bent portion <NUM> and a first extension portion <NUM> extending substantially in the second direction, the first U-shaped bent portion <NUM> includes a first bent portion <NUM>, a second bent portion <NUM>, and a first connection portion <NUM>. The first bent portion <NUM> is electrically connected with the second rounded-corner touch electrode <NUM> and is located at a side of the touch-driving connection line <NUM> close to the touch region <NUM>. The second bent portion <NUM> is connected with the first extension portion <NUM> and is located at a side of the touch-driving connection line <NUM> away from the touch region <NUM>. The first connection portion <NUM> connects the first bent portion <NUM> with the second bent portion <NUM>. The first connection portion <NUM> is overlapped with the touch-driving connection line <NUM>. In an overlap region of the first connection portion <NUM> and the touch-driving connection line <NUM>, the first connection portion <NUM> and the touch-driving connection line <NUM> are arranged in different layers. It should be explained that the above-mentioned first touch electrode is a touch-driving electrode, and the above-mentioned second touch electrode is a touch-sensing electrode; of course, the embodiments of the present disclosure include, but are not limited thereto, the above-mentioned first touch electrode may also be a touch-sensing electrode, and the aforementioned second touch electrode may also be a touch-driving electrode. Each first touch electrode is a touch electrode extending in the second direction, and a plurality of first touch electrodes are arranged in the first direction; each second touch electrode is a touch electrode extending in the first direction, and a plurality of second touch electrodes are arranged in the second direction. In addition, the above-mentioned first direction and the second direction are two directions located in a plane of the touch substrate and are intersected with each other, for example, are perpendicular to each other.

In the touch substrate provided by an embodiment of the present disclosure, the touch-sensing connection line includes a first U-shaped bent portion and a first extension portion extending substantially in the second direction, and the first U-shaped bent portion includes a first bent portion, a second bent portion, and a first connection portion that is arranged in a layer different from the touch-driving connection line, so that the second rounded-corner touch electrode extending into the rounded-corner region can be connected with the first extension portion of a corresponding touch-sensing connection line by using a bridge in the rounded-corner region.

For example, as illustrated in <FIG>, the touch region <NUM> may be a rectangle with rounded corners, and the four corners of the touch region <NUM> are all rounded-corner regions <NUM>. Of course, the embodiments of the present disclosure include but are not limited thereto, as long as the touch region includes at least one rounded-corner region.

For example, as illustrated in <FIG>, the first touch electrode <NUM> and the second touch electrode <NUM> may be made of the same conductive layer. For example, the second touch electrode <NUM> may be a continuous electrode extending in the first direction, and the first touch electrode <NUM> may include a plurality of block-shaped electrodes separated by the second touch electrodes <NUM> and a plurality of block-shaped electrodes connecting the plurality of block-shaped electrodes. Of course, the embodiments of the present disclosure include but are not limited thereto, and a layout of the first touch electrode and the second touch electrode may refer to a common design.

For example, as illustrated in <FIG>, the touch substrate <NUM> further includes a ground line <NUM> located at a side of the touch-sensing connection wire <NUM> away from the touch-driving connection line <NUM> or away from the touch region <NUM>.

For example, as illustrated in <FIG>, the touch substrate <NUM> further includes a bonding region <NUM>, and the rounded-corner region <NUM> is located at a corner of the touch region <NUM> close to the bonding region <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, the first bent portion <NUM> is substantially parallel with an outer edge of the rounded-corner region <NUM>, and the second bent portion <NUM> is substantially parallel with the outer edge of the rounded-corner region <NUM>.

In some exemplary embodiments, as illustrated in <FIG> and <FIG>, the first bent portion <NUM> of the touch-sensing connection line <NUM> is spaced apart from the rounded-corner region <NUM>. The touch-sensing connection line <NUM> may further include an interconnection portion <NUM> that electrically connects the first bent portion <NUM> of the touch-sensing connection line <NUM> with the second rounded-corner touch electrode <NUM>. Of course, the embodiments of the present disclosure include but are not limited thereto. As illustrated in <FIG>, the touch-sensing connection line may not be provided with an interconnection portion, and the first bent portion <NUM> is directly connected with the second rounded-corner touch electrode <NUM>. In this case, an orthographic projection of the first bent portion <NUM> of the touch-sensing connection line <NUM> on the base substrate <NUM> is at least partially overlapped with an orthographic projection of the second rounded-corner touch electrode <NUM> on the base substrate <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, <FIG>, the touch substrate <NUM> further includes a first shielding line <NUM>, and the first shielding line <NUM> includes a second extension <NUM> and a second U-shaped bent portion <NUM>. The second U-shaped bent portion <NUM> includes a third bent portion <NUM>, a fourth bent portion <NUM>, and a second connection portion <NUM>. The third bent portion <NUM> is located between the first bent portion <NUM> and the touch-driving connection line <NUM>. The fourth bent portion <NUM> is located at a side of a touch-driving connection line <NUM> away from the first bent portion <NUM>. The second connection portion <NUM> connects the third bent portion <NUM> with the fourth bent portion <NUM>. The second connection portion <NUM> and the touch-driving connection line <NUM> are overlapped with and insulated from each other. The second U-shaped bent portion <NUM> is located in a region enclosed by the first bent portion <NUM>, the second bent portion <NUM> and the first connection portion <NUM> that are of the first U-shaped bent portion <NUM>. The first connection portion <NUM> and the second connection portion <NUM> are substantially parallel with each other, and an opening direction of the second U-shaped bent portion <NUM> and an opening direction of the first U-shaped bent portion <NUM> are the same.

The touch substrate provided by this example can prevent from signal interference between the touch-sensing connection line and the touch-driving connection line by providing the above-mentioned first shielding line, thereby avoiding an influence on touch performance. In addition, because the above-mentioned first shielding line includes a second U-shaped bent portion located in a region enclosed by the first bent portion, the second bent portion, and the first connection portion that are of the first U-shaped bent portion, so that a signal interference that occurs between the touch-sensing connection line and the touch-driving connection line can be better prevented, so as to avoid an influence on touch performance.

For example, as illustrated in <FIG>, the second extension <NUM> extends substantially in the first direction and is located at a side of the touch-driving connection line <NUM> away from the touch region <NUM>, thereby preventing from interference to touch-driving connection line <NUM> caused by external static electricity or electrical signals.

In some exemplary embodiments, as illustrated in <FIG> and <FIG>, the touch substrate further includes a second shielding line <NUM>. An orthographic projection of the second shielding line <NUM> on the base substrate <NUM> is located between an orthographic projection of the first shielding line <NUM> on the base substrate and an orthographic projection of the second bent portion <NUM> of the touch-sensing connection line <NUM> on the base substrate <NUM>. Therefore, the second shielding line can prevent signal interference between the touch-sensing connection line and the external touch-sensing connection line.

In some exemplary embodiments, as illustrated in <FIG> and <FIG>, in the region enclosed by the first U-shaped bent portion <NUM>, an orthographic projection of the touch-driving connection line <NUM> on the base substrate <NUM> is located between an orthographic projection of the third bent portion <NUM> on the base substrate <NUM> and an orthographic projection of the fourth bent portion <NUM> on the base substrate <NUM>. Therefore, the first shielding line can better prevent from the signal interference between the touch-sensing connection line and the touch-driving connection line, so as to avoid touch performance from being affected by the signal interference between the touch-sensing connection line and the touch-driving connection line.

In some exemplary embodiments, as illustrated in <FIG> and <FIG>, in the region enclosed by the first U-shaped bent portion <NUM>, the touch-driving connection line <NUM> includes a first touch-driving connection sub-line <NUM> located at a side of the second connection portion <NUM> away from the first connection portion <NUM>, and a second touch-driving connection sub-line <NUM> located at a side of the first connection portion <NUM> away from the second connection portion <NUM>. The touch substrate <NUM> further includes a bridge portion <NUM> connecting the first touch-driving connection sub-line <NUM> with the second touch-driving connection sub-line <NUM>. Thus, by providing the bridge portion <NUM>, the touch-driving connection line <NUM> can go across the first connection portion <NUM> of the first U-shaped bent portion <NUM> and the second connection portion <NUM> of the second U-shaped bent portion <NUM>, and can effectively prevent from signal interference between the first connection portion <NUM> and the second connection portion <NUM> to the touch-driving connection line <NUM>.

<FIG> is a schematic cross-sectional view of a touch substrate illustrated in <FIG> taken along line CC and provided by an embodiment of the present disclosure. <FIG> is a schematic cross-sectional view of a touch substrate illustrated in <FIG> taken along line DD and provided by an embodiment of the present disclosure.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, the first shielding line <NUM> further includes: a third extension portion <NUM> that extends substantially in the second direction; a third connection portion <NUM> that is located in a layer different from the first connection portion <NUM>; a first through-hole connection portion <NUM> that connects the third connection portion <NUM> with the third extension portion <NUM>; and the second through-hole connection portion <NUM> that connects the third connection portion <NUM> with the fourth bent portion <NUM>. The third connection portion <NUM> is located in the first conductive layer, the third extension portion <NUM> and the fourth bent portion <NUM> are located in the second conductive layer, an insulation layer <NUM> is provided between the first conductive layer and the second conductive layer, and the first through-hole connection portion <NUM> and the second through-hole connection portion <NUM> are provided in the insulation layer <NUM>. Due to the insulation effect of the insulation layer <NUM>, a parasitic capacitance of a capacitor formed between the third connection portion <NUM> and the first connection portion <NUM> is relatively small, so that the signal interference between the third connection portion <NUM> and the first connection portion <NUM> is weaker, and has less influence on touch effect.

In some exemplary embodiments, as illustrated in <FIG> and <FIG>, the bridge portion <NUM> includes: a fourth connection portion <NUM> arranged in a layer different from the first connection portion <NUM>; and a third through-hole connection portion <NUM> that connects the fourth connection portion <NUM> with the first touch-driving connection sub-line <NUM>; and a fourth through-hole connection portion <NUM> that connects the fourth connection portion <NUM> with the second touch-driving connection sub-line <NUM>. The fourth connection portion <NUM> is located in the first conductive layer. The first touch-driving connection sub-line <NUM> and the second touch-driving connection sub-line <NUM> are located in the second conductive layer, an insulation layer <NUM> is provided between the first conductive layer and the second conductive layer, and the third through-hole connection portion <NUM> and the fourth through-hole connection portion <NUM> are disposed in the insulation layer.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, an orthographic projection of the fourth connection portion <NUM> on the base substrate <NUM> is overlapped with an orthographic projection of the first touch-driving connection sub-line <NUM> on the base substrate <NUM> and an orthographic projection of the second touch-driving connection sub-line <NUM> on the base substrate <NUM>, respectively.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, a center of the second through-hole connection portion <NUM> and a center of the third through-hole connection portion <NUM> are staggered in the second direction, that is, an orthographic projection of the center of the second through-hole connection portion <NUM> on the second direction is not overlapped with an orthographic projection of the center of the third through-hole connection portion <NUM> on the second direction. Thus, when forming the second through-hole connection portion and the third through-hole connection portion as described above, various defects caused by a small distance between via hole position of the second through-hole connection portion and via hole position of the third through-hole connection portion can be avoided.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, the third connection portion <NUM> is located in a first conductive layer, that is, the third connection portion <NUM> is a part of the first conductive layer, and the first touch-driving connection sub-line <NUM> and the second touch-driving connection sub-line <NUM> are located in a second conductive layer, that is, the first touch-driving connection sub-line <NUM> and the second touch-driving connection sub-line <NUM> are parts of the second conductive layer, respectively. An insulation layer <NUM> is arranged between the first conductive layer and the second conductive layer, and the first through-hole connection portion <NUM> and the second through-hole connection portion <NUM> are arranged in the insulation layer <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, an orthographic projection of the third connection portion <NUM> on the base substrate <NUM> is overlapped with an orthographic projection of the fourth bent portion <NUM> on the base substrate <NUM> and an orthographic projection of the third extension portion <NUM> on the base substrate <NUM>, respectively.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, the second shielding line <NUM> includes a first shielding sub-line <NUM> located at a side of the second connection portion <NUM> away from the first connection portion <NUM> and a second shielding sub-line <NUM> located at a side of the first connection portion <NUM> away from the second connection portion <NUM>. The touch substrate <NUM> further includes a shielding-line bridge-portion <NUM> connecting the first shielding sub-line <NUM> with the second shielding sub-line <NUM>. Thus, by providing the shielding-line bridge-portion <NUM>, the second shielding line <NUM> can go across the first connection portion <NUM> of the first U-shaped bent portion <NUM> and the second connection portion <NUM> of the second U-shaped bent portion <NUM>, and can further prevent from a signal interference to the touch-driving connection line <NUM> caused by the second bent portion <NUM>.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, the shielding-line bridge-portion <NUM> includes: a fifth connection portion <NUM> that is arranged in a layer different from the first connection portion <NUM>; and a fifth through-hole connection portion <NUM> that connects the fifth connection portion <NUM> with the first shielding sub-line <NUM>; and a sixth through-hole connection portion <NUM> that connects the fifth connection portion <NUM> with the second shielding sub-line <NUM>. The fifth connection portion <NUM> is located in a first conductive layer, the first shielding sub-line <NUM> and the second shielding sub-line <NUM> are located in a second conductive layer, an insulation layer <NUM> is provided between the first conductive layer and the second conductive layer, the fifth through-hole connection portion <NUM> and the sixth through-hole connection portion <NUM> are arranged in the insulation layer.

Similarly, a center of the fifth through-hole connection portion <NUM>, a center of the second through-hole connection portion <NUM> and a center of the third through-hole connection portion <NUM> are staggered in the second direction, that is, an orthographic projection of the center of the fifth through-hole connection portion <NUM> on the second direction and an orthographic projection of the center of the second through-hole connection portion <NUM> on the second direction are not overlapped with an orthographic projection of the center of the third through-hole connection portion <NUM> on the second direction, respectively. Therefore, when forming the second through-hole connection portion, the third through-hole connection portion, and the fifth through-hole connection portion, various defects caused by small distances between via hole positions of the second through-hole connection portion, the third through-hole connection portion, and the fifth through-hole connection portion can be avoided.

It should be explained that the first bent portion, the second bent portion, and the touch-driving connection line may all include a connection via structure, and the centers of the connection via structures may also be staggered in the second direction with respect to the center of the fifth through-hole connection portion, the center of the second through-hole connection portion and the center of the third through-hole connection portion, respectively.

In some exemplary embodiments, as illustrated in <FIG>, and <FIG>, an orthographic projection of the fifth connection portion <NUM> on the base substrate <NUM> is overlapped with an orthographic projection of the first shielding sub-line <NUM> on the base substrate <NUM> and an orthographic projection of the second shielding sub-line <NUM> on the base substrate <NUM>, respectively.

In some exemplary embodiments, the base substrate <NUM> is a cover plate of a display panel or an encapsulation layer of a display panel. In other words, the display panel can be integrated with the touch substrate, thereby having both touch function and display function.

An embodiment of the present disclosure further provides a touch display device. <FIG> is a schematic diagram of a touch display device provided by an embodiment of the present disclosure. As illustrated in <FIG>, the touch display device <NUM> includes the aforementioned touch substrate <NUM>. Therefore, the display device has the same or similar beneficial technical effects as the beneficial effects of the above-mentioned organic light-emitting diode display substrate. For details, please refer to the related description of the embodiments illustrated in <FIG>, <FIG>, without repeated here.

In some exemplary embodiments, the touch display device <NUM> further includes a substrate <NUM>, a light-emitting element <NUM> located on the substrate <NUM>, and an encapsulation layer <NUM> located at a side of the light-emitting element <NUM> away from the substrate <NUM>. The aforementioned touch substrate <NUM> is directly disposed on the encapsulation layer <NUM>, so that a thickness of the touch display device can be reduced, and the touch display device can be lighter and thinner. On the other hand, by directly disposing the aforementioned touch substrate on the encapsulation layer, the touch display device can also be applicable to foldable and bendable electronic products.

Claim 1:
A touch substrate (<NUM>), including:
a base substrate (<NUM>);
a plurality of first touch electrodes (<NUM>) disposed on the base substrate (<NUM>) and arranged in a first direction; and
a plurality of second touch electrodes (<NUM>) disposed on the base substrate (<NUM>) and arranged in a second direction,
wherein the touch substrate (<NUM>) includes a touch region (<NUM>) and a peripheral region (<NUM>) located at a periphery of the touch region (<NUM>), and the touch region (<NUM>) includes a rounded-corner region (<NUM>),
the plurality of first touch electrodes (<NUM>) include at least one first rounded-corner touch electrode (<NUM>) extending into the rounded-corner region (<NUM>), the touch substrate (<NUM>) further includes a touch-driving connection line (<NUM>) connected with each of the at least one first rounded-corner touch electrode (<NUM>), the plurality of second touch electrodes (<NUM>) include at least one second rounded-corner touch electrode (<NUM>) extending into the rounded-corner region (<NUM>),
the touch substrate (<NUM>) further includes a touch-sensing connection line (<NUM>) connected with each of the at least one second rounded-corner touch electrode (<NUM>),
characterized in that the touch-sensing connection line (<NUM>) includes a first U-shaped bent portion (<NUM>) and a first extension portion (<NUM>) extending in the second direction, the first U-shaped bent portion (<NUM>) includes a first bent portion (<NUM>), a second bent portion (<NUM>), and a first connection portion (<NUM>), the first bent portion (<NUM>) is electrically connected with the second rounded-corner touch electrode (<NUM>) and located at a side of the touch-driving connection line (<NUM>) close to the touch region (<NUM>), the second bent portion (<NUM>) is connected with the first extension portion (<NUM>) and located at a side of the touch-driving connection line (<NUM>) away from the touch region (<NUM>), and the first connection portion (<NUM>) connects the first bent portion (<NUM>) with the second bent portion (<NUM>), and
the first connection portion (<NUM>) and the touch-driving connection line (<NUM>) are overlapped with each other in a direction perpendicular to the base substrate (<NUM>), and, in an overlap region of the first connection portion (<NUM>) and the touch-driving connection line (<NUM>), the first connection portion (<NUM>) and the touch-driving connection line (<NUM>) are arranged in different layers.