Touch structure, display panel, and electronic device

A touch structure, a display panel, and an electronic device. In the touch structure, the first touch sub-electrodes and the first connecting electrodes are alternately arranged and sequentially connected to form a first touch electrode; the second touch sub-electrodes of the first grid layer and the first touch sub-electrodes are at intervals, and the two respectively include multiple first metal grids; the second connecting electrodes are connected to adjacent second touch sub-electrodes to form a second touch electrode extending in a second direction. A first grid row of each second connecting electrode includes multiple second metal grids arranged in a first direction, a second grid row thereof is adjacent to the first grid row and includes a second metal grid; all the second metal wires of the second grid row close to the first grid row are second metal wires shared with the first grid row.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is the National Stage of PCT/CN2021/113560 filed on Aug. 19, 2021, which claims priority under 35 U.S.C. § 119 of Chinese Application No. 202010941621.5 filed on Sep. 9, 2020, the disclosure of which is incorporated by reference.

TECHNICAL FIELD

At least one embodiment of the present disclosure relates to a touch structure, a display panel and an electronic device.

BACKGROUND

The user interface with touch function is widely used in various electronic devices, for example, display devices. The touch structure used to realize the touch function includes a touch electrode structure, the arrangement of the touch electrode structure is an important factor affecting the user experiences.

SUMMARY

At least one embodiment of the present disclosure provides a touch structure, the touch structure includes a first metal grid layer and a second metal grid layer, an insulation layer is provided between the first metal grid layer and the second metal grid layer, the first metal grid layer includes a plurality of first metal grids defined by a plurality of first metal lines, and the second metal grid layer comprises a plurality of second metal grids defined by a plurality of second metal lines, shapes of each of the plurality of first metal grids and each of the second metal grids are both polygons; the first metal grid layer includes a plurality of first touch sub-electrodes and a plurality of first connection electrodes along a first direction, the plurality of first touch sub-electrodes and the plurality of first connection electrodes are alternately distributed one by one and are electrically connected in sequence to constitute a first touch electrode extending along the first direction; the first metal grid layer further includes a plurality of second touch sub-electrodes provided in sequence along a second direction and spaced apart from each other, and the first direction intersects the second direction; each of the plurality of first touch sub-electrodes and each of the second touch sub-electrodes are spaced apart from each other, and respectively include a plurality of first metal grids; the second metal grid layer includes a plurality of second connection electrodes spaced apart from each other, each of the plurality of second connection electrodes is electrically connected with adjacent second touch sub-electrodes through a plurality of vias in the insulation layer, so as to electrically connect the adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction; each of the plurality of second connection electrodes includes a first metal grid row and a second metal grid row along the second direction. The first metal grid row includes a plurality of the second metal grids arranged along the first direction; the second metal grid row is adjacent to and connected with the first metal grid row, and comprises at least one second metal grid among the plurality of second metal grids arranged along the first direction; a count of the at least one second metal grid in the second metal grid row is less than or equal to a count of the second metal grids in the first metal grid row, and all the second metal lines of the at least one second metal grid in the second metal grid row close to the first metal grid row are sharing second metal lines shared with the second metal grid in the first metal grid row.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the first metal grid row is electrically connected with the second touch sub-electrode adjacent to the first metal grid row, and orthographic projections of the sharing second metal lines shared with the second metal grid in the first metal grid row on the first metal grid layer overlap with the first metal lines.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the count of the second metal grids in the first metal grid row is 2, and the count of the at least one second metal grid in the second metal grid row is 1.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the plurality of vias comprise a first via, and the first metal grid row is electrically connected with one of two second touch sub-electrodes adjacent to the second connection electrode in which the first metal grid row is located through the first via.

For example, in the touch structure provided by at least one embodiment of the present disclosure, orthographic projections of a plurality of second metal lines of the second metal grids of the first metal grid row on the first metal grid layer respectively overlap with a plurality of first metal lines of the first metal grids of the second touch sub-electrode, so that the second metal grids has a plurality of vertices overlapped with the first metal grids, and the plurality of vertices comprise a plurality of connection vertices, the first via is correspondingly arranged at the plurality of connection vertices.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the shapes of each of the plurality of first metal grids and each of the second metal grids are both hexagons; the plurality of second metal lines of the second metal grids of the first metal grid row respectively overlap with four first metal lines of an edge first metal grid of a second touch sub-electrode adjacent to the first metal grid row in a direction perpendicular to the second metal grid layer, so that the edge first metal grid has five vertices overlapped with the second metal grids; the four first metal lines sequentially connect the five vertices to be in a W shape, the four first metal lines respectively intersect both the first direction and the second direction, and at least one of the five vertices is the connection vertex.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the plurality of the second metal grids of the first metal grid row are first edge second metal grids at a first edge of the second connection electrode, and are located at a first end of the second connection electrode in the second direction, and are electrically connected with the edge first metal grid of the second touch sub-electrode adjacent to the first metal grid row.

For example, in the touch structure provided by at least one embodiment of the present disclosure, each of the plurality of second connection electrodes along the second direction further comprises: a third metal grid row and a fourth metal grid row. The third metal grid row is on a side of the second metal grid row away from the first metal grid row, and comprising a plurality of the second metal grids arranged along the first direction; and the fourth metal grid row is on a side of the third metal grid row close to the second metal grid row, adjacent to and connected with the third metal grid row, and comprising at least one second metal grid among the plurality of second metal grids arranged along the first direction; a count of the at least one second metal grid in the fourth metal grid row is less than or equal to a count of the second metal grids in the third metal grid row, and all the second metal lines of the at least one second metal grid in the fourth metal grid row close to the third metal grid row are sharing second metal lines shared with the second metal grid in the third metal grid row, the second metal grid of the third metal grid row is a second edge metal grid of the second connection electrode at a second edge of the second connection electrode, is located at a second end of the second connection electrode in the second direction, and is electrically connected with the edge first metal grid of the second touch sub-electrode adjacent to the third metal grid row, and the second end is opposite to the first end in the second direction; the plurality of vias comprise a second via, and the third metal grid row is electrically connected with other one of the two second touch sub-electrodes adjacent to the second connection electrode in which the third metal grid row is located through the second via.

For example, in the touch structure provided by at least one embodiment of the present disclosure, orthographic projections of the sharing second metal lines shared with the second metal grid in the third metal grid row on the first metal grid layer do not overlap with the first metal lines, or the orthographic projections of the sharing second metal lines shared with the second metal grid in the third metal grid row on the first metal grid layer overlap with the first metal lines.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the count of the second metal grids in the third metal grid row is 2, and the count of the at least one second metal grid in the fourth metal grid row is 1.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the second connection electrode further comprises at least one intermediate metal grid row between the second metal grid row and the fourth metal grid row, each row of the at least one intermediate metal grid row comprises at least one second metal grid among the plurality of second metal grids.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a count of the at least one second metal grid in each row of the at least one intermediate metal grid row is 1.

For example, in the touch structure provided by at least one embodiment of the present disclosure, each of the plurality of second connection electrodes along the second direction further comprises: a third metal grid row and a third metal grid row. The third metal grid row is on a side of the second metal grid row away from the first metal grid row, adjacent to the second metal grid row, and comprises plurality of the second metal grids arranged along the first direction; the count of the at least one second metal grid in the second metal grid row is less than or equal to a count of the second metal grids in the third metal grid row, and all second metal lines of the at least one second metal grid in the second metal grid row close to the third metal grid row are sharing second metal lines shared with the second metal grid in the third metal grid row, the second metal grids of the third metal grid row is a second edge metal grid of the second connection electrode at a second edge of the second connection electrode, is located at a second end of the second connection electrode in the second direction, and is electrically connected with an edge first metal grid of the second touch sub-electrode adjacent to the third metal grid row, and the second end is opposite to the first end in the second direction; the plurality of vias comprise a second via, and the third metal grid row is electrically connected with other one of the two second touch sub-electrodes adjacent to the second connection electrode in which the third metal grid row is located through the second via.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a pattern of each of the plurality of second connection electrodes is symmetrical with respect to a symmetry axis extending along the first direction.

For example, in the touch structure provided by at least one embodiment of the present disclosure, each of the second metal grids comprises at least two vertical edges extending along the second direction, and orthographic projections of the at least two vertical edges on the first metal grid layer do not overlap with the first metal line.

For example, in the touch structure provided by at least one embodiment of the present disclosure, adjacent second touch sub-electrodes among the plurality of second touch sub-electrodes are electrically connected through two of the second connection electrodes, and the two of the second connection electrodes are spaced apart from each other; an orthographic projection of each of the plurality of first connection electrodes on the second metal grid layer is in a gap between the two of the second connection electrodes connecting the adjacent second touch sub-electrodes.

For example, in the touch structure provided by at least one embodiment of the present disclosure, each of the plurality of first touch sub-electrodes is electrically connected with an adjacent first connection electrode through at least one first connection line constituted by a plurality of first metal lines connected end to end in sequence; an orthographic projection of the first connection line on the second metal grid layer respectively overlaps with a plurality of second metal lines in the second connection electrode, and the first connection line at least partially overlaps with an orthographic projection of the sharing second metal line on the first metal grid layer.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a plurality of the first metal lines located in a boundary region between adjacent first touch sub-electrode and the second touch sub-electrode respectively comprise a plurality of openings, each of the plurality of openings divides the first metal line into two first metal segments, one of the two first metal line segments belongs to the first touch sub-electrode and other one of the two first metal line segments belongs to the second touch sub-electrode, so that the adjacent first touch sub-electrode and the second touch sub-electrode are insulated from each other.

At least one embodiment of the present disclosure provides a touch structure, the touch structure includes a plurality of touch sub-electrodes spaced apart from each other and a dummy electrode. The dummy electrode is embedded in at least one touch sub-electrode of the plurality of touch sub-electrodes and spaced apart from the touch sub-electrode in which the dummy electrode is embedded to insulate each other; the at least one touch sub-electrode comprises a strip-shaped channel and a main body part surrounding the dummy electrode and the channel, and the strip-shaped channel passes through the dummy electrode, and two ends of the strip-shaped channel in an extension direction of the strip-shaped channel are connected with the main body part.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the channel comprises at least one narrow part and at least one wide part which are alternately arranged and sequentially connected in the extension direction of the channel, and a width of each of the at least one narrow part in a direction perpendicular to the extension direction of the channel is less than a width of each of the at least one wide part in direction perpendicular to the extension direction of the channel.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a ratio of a length of each of the at least one narrow part in the extension direction of the channel to the width of each of the at least one narrow part is greater than a ratio of a length of each of the at least one wide part in the extension direction of the channel to the width of each of the at least one wide part.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a plurality of wide parts are arranged at equal intervals, and lengths of a plurality of narrow parts are equal to each other.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the at least one touch sub-electrode comprises a plurality of the strip-shaped channels, and the plurality of strip-shaped channels comprise: a strip-shaped first channel and a strip-shaped second channel. The strip-shaped first channel extends substantially along a first extension direction; the strip-shaped second channel extends substantially along a second extension direction and intersecting the first channel; the dummy electrode comprises at least four parts separated from each other by the first channel and the second channel.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the at least one touch sub-electrode comprises a plurality of the strip-shaped channels, and the plurality of strip-shaped channels comprise: a plurality of strip-shaped first channels and a plurality of strip-shaped second channels. The plurality of strip-shaped first channels respectively extends substantially along a first extension direction and spaced apart from each other; the plurality of strip-shaped second channels respectively extends substantially along a second extension direction and spaced apart from each other; each of the strip-shaped second channels intersects each of the plurality of strip-shaped first channels, and the dummy electrode comprises a plurality of parts separated from each other by the plurality of strip-shaped first channels and the plurality of strip-shaped second channels.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the first extension direction is perpendicular to the second extension direction.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the plurality of strip-shaped first channels comprise two first channels, the plurality of strip-shaped second channels comprise two second channels, and the dummy electrode comprises at least nine parts separated from each other by the two first channels and the two second channels.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the at least one touch sub-electrode comprises a communication part, the plurality of strip-shaped channels are electrically connected with each other through the communication part, and the plurality of parts of the dummy electrode surround the communication part.

For example, in the touch structure provided by at least one embodiment of the present disclosure, each of the plurality of channels comprises a plurality of narrow parts and a plurality of wide part alternately arranged and sequentially connected in an extension direction of the each of the plurality of channels, and a width of each of the plurality of narrow parts in a direction perpendicular to the extension direction of the channel is less than a width of each of the plurality of wide parts in the direction perpendicular to the extension direction of the channel, the narrow part of the first channel intersects the narrow part of the second channel.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the narrow part of the first channel has an intersection point with the narrow part of the second channel, the first channel comprises a first wide part and a second wide part that are respectively on two sides of the intersection point and adjacent to the intersection point, and the second channel comprises a third wide part and a fourth wide part that are respectively on two sides of the intersection point and adjacent to the intersection point; distances from the first wide part, the second wide part, the third wide part and the fourth wide part to the intersection point are equal.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a shape of an outer contour of an overall structure constituted by the dummy electrode and the strip-shaped channel is a first polygon; the two ends of the channel are respectively close to two adjacent edges of the first polygon, or the two ends of the channel are respectively close to two opposite edges of the first polygon, or the two ends of the channel are respectively close to two non-adjacent vertices of the first polygon.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a shape of an outer contour of the main body part is a second polygon, and the second polygon and the first polygon are similar polygons.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the strip-shaped channel is in a straight strip substantially; a shape of an outer contour of an overall structure constituted by the dummy electrode and the channel is substantially a first polygon, the channel is parallel to at least one edge of the first polygon, or the channel is not parallel to any edge of the first polygon.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the strip-shaped channel is in a curved strip shape or in a fold line shape.

For example, in the touch structure provided by at least one embodiment of the present disclosure, at least one strip-shaped channel comprises a first segment and a second segment that are arranged along the extension direction of the at least one strip-shaped channel, the first segment and the second segment are substantially parallel to each other, and the first segment and the second segment are electrically connected through a metal connection line.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a ratio of a maximum size of a region crossed by an entirety of the dummy electrode to a maximum size of the touch sub-electrode in which the dummy electrode is located in a same direction is greater than or equal to 0.4 and less than or equal to 0.6; a ratio of a minimum width of the channel to the maximum size of the region crossed by the entirety of the dummy electrode is greater than or equal to 0.03 and less than or equal to 0.1.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the at least one touch sub-electrode further comprises a plurality of interdigital structures connected with the main body part, and the plurality of interdigital structures are distributed around the main body part and protrude from the main body part in a direction away from the main body part; the extension direction of the channel is parallel to an extension direction of at least a part of the interdigital structures in the plurality of interdigital structures, or the extension direction of the channel of the touch sub-electrode is not parallel to the extension direction of at least a part of the interdigital structures in the plurality of interdigital structures; the at least a part of the interdigital structure protrudes from an edge of an outer contour of the main body part close to two ends of the channel.

For example, in the touch structure provided by at least one embodiment of the present disclosure, in the extension direction of the channel, the two ends of the strip-shaped channel at least partially overlap with the interdigital structure protruding from the edge of the main body close to the two ends of the channel, and at least a part of an edge of the channel along the extension direction of the channel is parallel to a part of an edge of the interdigital structure.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the touch structure comprises a first electrode layer and a second electrode layer, and an insulation layer is provided between the first electrode layer and the second electrode layer; the plurality of touch sub-electrodes comprise a plurality of first touch sub-electrodes and a plurality of second touch sub-electrodes, and the touch structure further comprises a plurality of first connection electrodes and a plurality of second connection electrodes; the plurality of first touch sub-electrodes and the plurality of first connection electrodes are all in the first electrode layer and arranged along a first direction, the plurality of first touch sub-electrodes and the plurality of first connection electrodes are alternately distributed one by one and electrically connected in sequence to constitute a first touch electrode extending along the first direction; the plurality of second touch sub-electrodes are in the first electrode layer, and are arranged in sequence along a second direction and spaced apart from each other, the first direction intersects the second direction, and each of the plurality of first touch sub-electrodes and each of the second touch sub-electrodes are spaced apart from each other; the plurality of second connection electrodes are in the second electrode layer and are spaced apart from each other, and each of the plurality of second connection electrodes is electrically connected with adjacent second touch sub-electrodes through vias in the insulation layer, so as to electrically connect the adjacent second touch sub-electrodes to constitute a second touch electrode extending in the second direction; the dummy electrode is embedded in the first touch sub-electrode and/or embedded in the second touch sub-electrode.

For example, in the touch structure provided by at least one embodiment of the present disclosure, a shape of an outer contour of an overall structure constituted by the dummy electrode and the channel is an irregular polygon; a first end of the outer contour of the dummy electrode and a second end of the outer contour of the dummy electrode that are opposite to each other in the second direction are respectively right opposite to second connection electrodes adjacent in the second direction, and respectively have a first groove and a second groove; the first groove is recessed toward the second end of the outer contour of the dummy electrode, and the second groove is recessed toward the first end of the outer contour of the dummy electrode; a third end of the outer contour of the dummy electrode and a fourth end of the outer contour of the dummy electrode that are opposite to each other in the first direction are respectively opposite to the first connection electrode, and respectively have a third groove and a fourth groove; the third groove is recessed toward the fourth end, and the fourth groove is recessed toward the third end.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the outer contour of the dummy electrode comprises a first protrusion in the first groove and a second protrusion in the second groove; the first protrusion protrudes in a direction away from the second end of the outer contour of the dummy electrode, and the second protrusion protrudes in a direction away from the first end of the outer contour of the dummy electrode.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the plurality of touch sub-electrodes and the dummy electrode are in a same metal grid layer, the metal grid layer comprises a plurality of metal grids defined by a plurality of metal lines, and each selected from a group consisting of the main body part, the channel and the dummy electrode respectively comprises a plurality of the metal grids.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the plurality of touch sub-electrodes and the dummy electrode are in a same metal grid layer, the metal grid layer comprises a plurality of metal grids defined by a plurality of metal lines, and the communication part comprises a plurality of the metal grids.

For example, in the touch structure provided by at least one embodiment of the present disclosure, in the at least one touch sub-electrode embedded with the dummy electrode, each part of the dummy electrode has a boundary region with the touch sub-electrode, a plurality of the metal lines in the boundary region respectively comprise a plurality of openings, each of the plurality of openings separates the metal line, in which the each of the plurality of openings is located, into two metal segments, and one of the two metal segments belongs to the touch sub-electrode, and other one of the two metal segments belongs to the dummy electrode, so that the dummy electrode is insulated from the touch sub-electrode.

For example, in the touch structure provided by at least one embodiment of the present disclosure, the channel comprises at least two conductor lines composed of a plurality of the metal lines connected with each other, the conductor lines pass through the dummy electrode and two ends of each of the conductor lines in extension direction of each of the conductor line are respectively connected with the main body.

For example, in the touch structure provided by at least one embodiment of the present disclosure, at least part of each channel comprises at least one metal grid arranged in a width direction of the each channel, and the width direction is perpendicular to the extension direction of the each channel.

For example, in the touch structure provided by at least one embodiment of the present disclosure, each channel comprises a plurality of the metal grids arranged in series along the extension direction of the each channel; or, each channel comprises a plurality of the metal grids arranged along the extension direction of the each channel and a metal connection line connecting at least two adjacent metal grids of the plurality of the metal grids.

For example, in the touch structure provided by at least one embodiment of the present disclosure, in a case that the touch structure comprises a first electrode layer and a second electrode layer, the first electrode layer is a first metal grid layer, and the second electrode layer is a second metal grid layer; the first metal grid layer comprises a plurality of first metal grids defined by a plurality of first metal lines, the second metal grid layer comprises a plurality of second metal grids defined by a plurality of second metal lines, both a shape of each of the plurality of first metal grids and a shape of each of the second metal grids are polygons; each selected from the group consisting of the main body part, the channel and the dummy electrode respectively comprises a plurality of the first metal grids; each of the plurality of second connection electrodes comprises a plurality of the second metal grids.

At least an embodiment of the present disclosure further provides a touch display panel, and the touch display panel comprises a base substrate, a display structure and any one of the touch structures provided by the embodiments of the present disclosure that are stacked on the base substrate.

At least an embodiment of the present disclosure further provides an electronic device, and the electronic device comprises any one of the touch structures provided by the embodiments of the present disclosure or any one of the touch display panels provided by the embodiments of the present disclosure.

DETAILED DESCRIPTION

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, such as “first,” “second,” or the like, which are used in the description and the claims of the present disclosure, are not intended to indicate any sequence, amount or importance, but for distinguishing various components. The terms, such as “comprise/comprising,” “comprise/comprising,” or the like 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 not preclude other elements or objects. The terms, such as “connect/connecting/connected,” “couple/coupling/coupled” or the like, are not limited to a physical connection or mechanical connection, but may comprise an electrical connection/coupling, directly or indirectly. The terms, “inside,” “outside,” “on,” “under,” or the like are only used to indicate relative position relationship, and when the position of the object which is described is changed, the relative position relationship may be changed accordingly.

The drawings in the present disclosure are not drawn strictly according to the actual scale. The number of the first touch electrode, the second touch electrode, the first touch sub-electrode, the second touch sub-electrode, the first metal grid and the second metal grid in the touch structure is not limited to the number shown in the figure. The specific size and the number of each structure can be determined according to actual needs. The drawings described in the present disclosure are only structural diagrams.

Organic light emitting diode (OLED) display panel has characteristics of self-illumination, high contrast, low energy consumption, wide viewing angle, fast response, flexible panel, wide temperature range, simple manufacturing and so on, and therefore has broad development prospects. In order to meet diverse needs of users, it is of great significance to integrate a variety of functions in the display panel, such as touch function, fingerprint recognition function and so on. For example, forming an on-cell touch structure in an OLED display panel is an implementation method, which realizes the touch function of the display panel by forming the touch structure on an encapsulation film of the OLED display panel.

For example, a mutual capacitive touch structure includes a plurality of touch electrodes, the plurality of touch electrodes include a touch driving electrode and a touch sensing electrode extending in different directions. The touch driving electrode Tx and touch sensing electrode Rx form mutual capacitance for touch sensing at the intersection of the touch driving electrode Tx and the touch sensing electrode Rx. The touch driving electrode Tx is used to input an excitation signal (touch driving signal), and the touch sensing electrode Rx is used to output a touch sensing signal. By inputting an excitation signal to, for example, a touch driving electrode extending longitudinally, and receiving a touch sensing signal from, for example, a touch sensing electrode extending laterally, a detection signal reflecting the capacitance value of the coupling point (for example, the intersection) of the lateral and longitudinal electrodes can be obtained. When a finger touches the touch screen (such as the cover glass), it affects the coupling between the touch driving electrode and the touch sensing electrode near the touch point, thus changing the mutual capacitance between the two electrodes at the intersection point, resulting in the change of the touch sensing signal. According to the data of the two-dimensional capacitance change of the touch screen based on the touch sensing signal, coordinates of the touch point can be calculated.

FIG.1shows a schematic diagram of the working principle of a mutual capacitive touch structure. As shown inFIG.1, driven by the touch driving circuit130, the touch driving electrode Tx is applied with a touch driving signal, thereby generating an electric field line E, the electric field line E is received by the touch sensing electrode Rx to form a reference capacitance. When a finger touches the touch screen110, because the human body is a conductor, part of the electric field line E generated by the touch driving electrode Tx is guided to the finger to form a finger capacitance, which reduces the electric field line E received by the touch sensing electrode Rx. Therefore, the capacitance value between the touch driving electrode Tx and the touch sensing electrode Rx decreases. The touch driving circuit130obtains the above capacitance value through the touch sensing electrode Rx, and compares the above capacitance value with the reference capacitance to obtain the capacitance value change. According to the data of the capacitance value change and in combination with the position coordinates of each touch capacitance, the coordinates of the touch point can be calculated.

In some touch structures, the touch driving electrode Tx includes a plurality of sub-electrodes electrically connected through bridges. There is an insulation layer between the bridges and the touch sensing electrode Rx, and there is an overlapping part between each bridge and the touch sensing electrode Rx in the direction perpendicular to the base substrate. The larger area of the overlapping part can increase the probability of short circuit between the touch driving electrode Tx and the touch sensing electrode Rx because of the electrical connection between the touch driving electrode Tx and the touch sensing electrode Rx, and it will cause poor touch effect, such as increasing the probability of false alarm points and false touch, and at the same time, it will increase the power consumption of the touch circuit.

At least one embodiment of the present disclosure provides a touch structure, the touch structure includes a first metal grid layer and a second metal grid layer, an insulation layer is provided between the first metal grid layer and the second metal grid layer, the first metal grid layer includes a plurality of first metal grids defined by a plurality of first metal lines, and the second metal grid layer comprises a plurality of second metal grids defined by a plurality of second metal lines, shapes of each of the plurality of first metal grids and each of the second metal grids are both polygons; the first metal grid layer includes a plurality of first touch sub-electrodes and a plurality of first connection electrodes along a first direction, the plurality of first touch sub-electrodes and the plurality of first connection electrodes are alternately distributed one by one and are electrically connected in sequence to constitute a first touch electrode extending along the first direction; the first metal grid layer further includes a plurality of second touch sub-electrodes provided in sequence along a second direction and spaced apart from each other, and the first direction intersects the second direction; each of the plurality of first touch sub-electrodes and each of the second touch sub-electrodes are spaced apart from each other, and respectively include a plurality of first metal grids; the second metal grid layer includes a plurality of second connection electrodes spaced apart from each other, each of the plurality of second connection electrodes is electrically connected with adjacent second touch sub-electrodes through a plurality of vias in the insulation layer, so as to electrically connect the adjacent second touch sub-electrodes to form a second touch electrode extending in the second direction; each of the plurality of second connection electrodes includes a first metal grid row and a second metal grid row along the second direction. The first metal grid row includes a plurality of the second metal grids arranged along the first direction; the second metal grid row is adjacent to and connected with the first metal grid row, and comprises at least one second metal grid among the plurality of second metal grids arranged along the first direction; a count of the at least one second metal grid in the second metal grid row is less than or equal to a count of the second metal grids in the first metal grid row, and all the second metal lines of the at least one second metal grid in the second metal grid row close to the first metal grid row are sharing second metal lines shared with the second metal grid in the first metal grid row.

In the touch structure provided by the embodiments of the present disclosure, both the overlapping area of the first metal line and the second metal line, and the overlapping area of the first touch electrode and the second touch electrode can be reduced through the sharing second metal line, so as to reduce the mutual capacitance between the first touch electrode and the second touch electrode, reduce the power consumption of the touch circuit, and reduce the risk of connection between the first metal line and the second metal line, and reduce the probability of short circuit between the first metal line and the second metal line.

Exemplarily,FIG.2is a schematic diagram of a touch structure40provided by an embodiment of the present disclosure. As shown inFIG.2, the touch electrode structure40includes a plurality of first touch electrodes410extending along the first direction D1(one first touch electrode410is shown at the position indicated by the corresponding dotted line inFIG.2) and a plurality of second touch electrodes420extending along the second direction D2(one second touch electrode420is shown at the position indicated by the corresponding dotted line inFIG.2). For example, the first touch electrode410is a touch sensing electrode Rx, and the second touch electrode420is a touch driving electrode Tx. However, the embodiments of the present disclosure do not limit this. In other examples, the first touch electrode410may be a touch driving electrode Tx, and the second touch electrode420may be a touch sensing electrode Rx.

Each first touch electrode410includes a plurality of first touch sub-electrodes411sequentially arranged along the first direction D1and connected with each other, and each second touch electrode420includes a plurality of second touch sub-electrodes421sequentially arranged along the second direction D2and connected with each other. As shown inFIG.3, both the main body contour of each first touch sub-electrode411and the main body contour of each the second touch sub-electrode421are in diamond shapes. In other examples, the first touch sub-electrode411and the second touch sub-electrode421may in other shapes, such as triangle, strip, etc.

The first touch sub-electrodes411adjacent in the first direction D1are electrically connected with each other through a first connection electrode412to form the first touch electrode410, and the second touch sub-electrodes421adjacent in the second direction D2are electrically connected with each other through a second connection electrode (not shown) to form the second touch electrode420.

Each first touch electrode410and each second touch electrode420are insulated from each other and intersect each other to form a plurality of touch units400at the intersection position, each touch unit includes one part of each of the two first touch electrodes connected with each other at the intersection position and at least one part of each of the two second touch electrodes connected with each other at the intersection position. The right side ofFIG.2shows an enlarged schematic diagram of a touch unit400. As shown in the figure, each touch unit400includes a half region of each of the two first touch sub-electrodes411adjacent to each other and a half region of each of the two second touch sub-electrodes421adjacent to each other, that is, on average, each touch unit400includes a region of one first touch sub-electrode411and a region of one second touch sub-electrode421, and the intersection point of the first touch sub-electrode411and the second touch sub-electrode421in each touch unit400(that is, the intersection of the first connection electrode and the second connection electrode) constitutes a reference point for calculating coordinates. When a finger touches the capacitive screen, the coupling between the first touch electrode and the second touch electrode near the touch point is affected, thereby changing the mutual capacitance between the two electrodes. The touch sensing signal changes according to the capacitance change of the touch screen, so that the coordinates of each touch point can be calculated based on the reference point. For example, the area of each touch unit400is equivalent to the area where a person's finger contacts the touch panel. If the area of the touch unit is too large, it may cause a touch blind spot on the panel, and if the area of the touch unit is too small, it may cause a false touch signal.

The average length of edges of each touch unit400is P, which is called a pitch of the touch structure. For example, the size range of the pitch P is 3.7 mm-5 mm, for example, about 4 mm; this is because the diameter of a human finger contacting the touch panel is about 4 mm. For example, the size of the pitch is the same as the average length of edges of each first touch sub-electrode411and the average length of edges of each second touch sub-electrode421, and is also the same as the distance between the centers of two adjacent first touch sub-electrodes411and the distance between the centers of two adjacent second touch sub-electrodes421.

As shown inFIG.2, the first touch sub-electrode411and the second touch sub-electrode421respectively include a main body part and a plurality of interdigital structures440extending from the main body part. The first touch sub-electrode411and the adjacent second touch sub-electrode421are nested with each other in the first metal grid50through the interdigital structure440to form mutual capacitance. The interdigital structure can increase the perimeter of one touch sub-electrode under the same area of one touch sub-electrode, so it can effectively improve the mutual capacitance without increasing the self-capacitance (capacitive load) of the touch sub-electrode, so as to improve the touch sensitivity. For example, the shape of the main body part may be circular or rectangular, and the shape of the interdigital structure includes at least one of the following shapes: parallelogram (for example, rectangle), triangle, trapezoid and hexagon.

For example, a plurality of interdigital structures440are distributed at the periphery of the main body part of the touch sub-electrode. For example, the planar shape of the main body part is rectangular, and the number of second interdigital structures112corresponding to each edge of the main body part is in a range of 3-10, for example, 6-10. In other examples, the planar shape of the main body part may be circular, and the plurality of interdigital structures440are uniformly distributed on the circumference of the circle.

FIG.2shows an enlarged schematic diagram of a touch unit400on the right. As shown inFIG.2, the first touch sub-electrodes411adjacent in the first direction D1are connected through the first connection electrode412to form the first touch electrode410extending along the first direction D1, and the second touch sub-electrodes421adjacent in the second direction D2are connected through the second connection electrode (not showing reference number inFIG.2) to form the second touch electrode420extending along the second direction D2.

FIG.3is an enlarged schematic diagram of a part in the frame inFIG.2. The touch structure40includes a first metal grid layer50and a second metal grid layer60. An insulation layer is arranged between the first metal grid layer50and the second metal grid layer60. In combination withFIG.2andFIG.3, the first metal grid layer50includes a plurality of first touch sub-electrodes411and a plurality of first connection electrodes412arranged along the first direction D1, the plurality of first touch sub-electrodes411and the plurality of first connection electrodes412are alternately distributed one by one and electrically connected in sequence, to form a first touch electrode410extending along the first direction D1, that is, along the first direction D1, the adjacent first touch sub-electrodes4111and4112are electrically connected to each other through the first connection electrode412to form the first touch electrode410located in the first metal grid layer50as shown inFIG.2. The first metal grid layer50further includes a plurality of second touch sub-electrodes421that are sequentially arranged along the second direction D2and spaced apart from each other, and the first direction D1intersects the second direction D2. Each of the plurality of first touch sub-electrodes411and each of the second touch sub-electrodes421are spaced apart from each other, and respectively include a plurality of first metal grids. The second metal grid layer60includes a plurality of second connection electrodes422spaced apart from each other. Each of the plurality of second connection electrodes422is electrically connected with adjacent second touch sub-electrodes4211and4212through a plurality of vias in the insulation layer, thereby electrically connecting the adjacent second touch sub-electrodes4211and4212, and forming the second touch electrode420extending in the second direction D2as shown inFIG.2. As shown inFIG.3, the first touch sub-electrode411and the second touch sub-electrode421are nested and isolated from each other in the first metal grid layer50through the interdigital structures440of the first touch sub-electrode411and the interdigital structures440of the second touch sub-electrode421. As shown inFIG.4B, the boundary line between the first touch sub-electrode411and the second touch sub-electrode421is serrated due to the existence of the interdigital structure.

FIG.4Ashows an enlarged schematic diagram of a region A inFIG.2andFIG.3, the region A is the intersection point (intersection region) of the first touch sub-electrode411and the second touch sub-electrode421, that is, a bridging region. The light grid inFIG.4Aillustrates the first metal grid52in the first metal grid layer50. The first metal grid layer50includes the first touch electrode410(including the first touch sub-electrode411and the first connection electrode412) and the second touch sub-electrode421. The first touch sub-electrode411, the first connection electrode412and the second touch sub-electrode421respectively include a plurality of first metal grids52connected with each other; the dark grid inFIG.4Aillustrates the second metal grid62in the second metal grid layer60, the second metal grid layer60includes a second connection electrode422, and the second connection electrode422includes a plurality of second metal grids62connected with each other.

FIG.4Bis a cross-sectional diagram ofFIG.4Ataken along a section line B-B′,FIG.5shows the first touch electrode layer inFIG.4A, andFIG.6Ashows the second touch electrode layer inFIG.4A. In combination withFIGS.4A-4B,5and6A, the touch structure40includes the first metal grid layer50and the second metal grid layer60, and the insulation layer70is arranged between the first metal grid layer50and the second metal grid layer60. The first metal grid layer50includes a plurality of first metal grids52defined by a plurality of first metal lines51, the second metal grid layer60includes a plurality of second metal grids62defined by a plurality of second metal lines61, and planar shapes of each of the plurality of first metal grids52and each of the plurality of second metal grids62are both polygons. For example, the planar shapes of each of the plurality of first metal grids52and each of the second metal grids62shown in the above figure are hexagons. Of course, in other embodiments, their shapes may also be other polygons, such as quadrilateral, pentagon, triangle, etc., which can be specifically designed according to needs. The embodiments of the present disclosure do not limit the shape of each first metal grid52and the shape of each second metal grid62, as long as the corresponding features in claims are satisfied.

As shown inFIG.4AandFIG.6A, each of the plurality of second connection electrodes422includes a first metal grid row1and a second metal grid row2that are arranged along the second direction. The first metal grid row1includes a plurality of second metal grids62arranged along the first direction D1. The second metal grid row2is adjacent to and connected with the first metal grid row1, and includes at least one second metal grid62arranged along the first direction D1. The number of the second metal grids62in the second metal grid row2is less than the number of the least one second metal grid62in the first metal grid row1, and all the second metal lines61of the second metal grid62in the second metal grid row2close to the first metal grid row1are sharing second metal lines611shared with the second metal grid62in the first metal grid row1.

In other embodiments, for example, as shown inFIG.6C, the number of the least one second metal grid62in the second metal grid row2is equal to the number of the second metal grids62in the first metal grid row1, and all the second metal lines61of the second metal grid62in the second metal grid row2close to the first metal grid row1are sharing second metal lines611shared with the second metal grid62in the first metal grid row1.

In the touch structure40provided by the embodiments of the present disclosure, because all the second metal lines61of the second metal grid62in the second metal grid row2close to the first metal grid row1are sharing second metal lines611shared with the second metal grid62in the first metal grid row1, except the second metal lines61shared with the first metal grid row1, there is no additional second metal line that overlaps with the first metal line51among the second metal lines, close to the first metal grid row1, of the second metal grid row2, so that the overlapping area of the first metal line51and the second metal line61is reduced, and the overlapping area of the first touch electrode410and the second touch electrode420is reduced, which reduces the mutual capacitance between the first touch electrode410and the second touch electrode420, improves the touch performance, and reduces the occurrence of false alarm and false touch and reduces the power consumption of touch circuit; at the same time, although there is an insulation layer between the first metal layer and the second metal layer, there is still the possibility that the insulation layer is missing at some positions in the manufacturing process of the touch structure. Therefore, reducing the overlapping area of the first metal line51and the second metal line61can also reduce the risk of connection between the first metal line51and the second metal line62, and reduce the probability of short circuit between the first metal line51and the second metal line61, which is conducive to the stability of the touch function of the entire touch structure, and solves the problems of poor touch performance, false alarm, false touch, and excessive power consumption of the touch circuit caused by the large overlapping area of the first metal line51and the second metal line61; at the same time, it can solve the problem of short circuit caused by the missing of insulation layer during the manufacturing process of the touch structure.

For example, the first metal grid row1and the second touch sub-electrode4211adjacent to the first metal grid row1are electrically connected, and the orthographic projection of the sharing second metal line611shared with the second metal grid62in the first metal grid row1on the first metal grid layer50overlaps with the first metal line51, so that on the basis of minimizing the overlapping area of the first metal line51and the second metal line62, the display panel or display device adopting the touch structure40has a high opening ratio.

For example, in this embodiment, the number of the second metal grids62in the first metal grid row1is 2, and the number of the at least one second metal grid in the second metal grid row2is 1, so that the second connection electrode422includes as few second metal grid as possible, and the overlapping area between the first metal line51and the second metal line62is minimized, provided that the second grid row2provides at least two electrical signal transmission channels along the second direction D2. The at least two electrical signal transmission channels are, for example, the first channel621and the second channel622represented by the gray line inFIG.6A.

In combination withFIG.4AandFIG.4B, the plurality of vias includes a first via71, and the first metal grid row1is electrically connected with one second touch sub-electrode4211of the two second touch sub-electrodes4211/4212adjacent to the second connection electrode422in which first metal grid row1is located through the first via71.

For example, as shown inFIG.4AandFIG.4B, the orthographic projections of the plurality of second metal lines61of the second metal grids62(for example, at least two metal grids62) of the first metal grid row1on the first metal grid layer50respectively overlap with the plurality of first metal lines51of the first metal grid52of the second touch sub-electrode421, so that the second metal grid62has a plurality of vertices overlapped with the first metal grid52. For example, in this embodiment, the number of the plurality of vertices is 5, which are respectively a first vertex01, a second vertex02, a third vertex03, a fourth vertex04and a fifth vertex05. The plurality of vertices include a plurality of first connection vertices, the first vias71are correspondingly arranged at the plurality of first connection vertices, that is, the plurality of vias71are arranged in one-to-one correspondence with the plurality of connection vertices, and the vertex of the second metal grid62provided with the first via71is called the first connection vertex.

It should be noted that the first metal line and second metal line in the present disclosure respectively refers to the metal line connected between two adjacent vertices of the first metal grid and the metal line connected between two adjacent vertices of the second metal grid, that is, each first metal line and each second metal line respectively serve as an edge of the first metal grid and an edge of the second metal grid.

For example, as shown inFIG.4A, the planar shapes of each of the plurality of first metal grids52and each of the second metal grids62are both hexagons. A plurality of second metal lines61a(for example, four second metal lines61a) of the second metal grid62of the first metal grid row1respectively overlap with four first metal lines51A of an edge first metal grid52(the first metal grid of the second touch sub-electrode4211close to the edge of the second connection electrode422) in the adjacent second touch sub-electrode4211in a direction perpendicular to the second metal grid layer60, so that the edge first metal grid52has the above five vertices overlapped with the second metal grid62; the four first metal lines51connect the five vertices in sequence to be in a W shape; each first metal line of the four first metal lines51intersect both the first direction D1and the second direction D2, and at least one of the five vertices is the connection vertex. For example, in this embodiment, the first vertex01, the second vertex02, the fourth vertex04and the fifth vertex05are the connection vertices; in other embodiments, the first vertex01, the second vertex02, the third vertex03, the fourth vertex04and the fifth vertex05may all be the connection vertices; alternatively, in some embodiments, non-adjacent vertices are the connection vertices, for example, the first vertex01, the third vertex03, and the fifth vertex05are connection vertices.

For example, the plurality of second metal grids62in the first metal grid row1are first edge second metal grids at a first edge of the second connection electrode, and are located at the first end of the second connection electrode422in the second direction D2, and are electrically connected with the edge first metal grids of the adjacent second touch sub-electrodes4211. That is, the edge second metal line61aof the second metal grid62of the first metal grid row1is connected with the edge first metal line51a, closest to the first metal grid row1, of the second touch sub-electrode4211adjacent to the edge second metal line61aof the second metal grid62of the first metal grid row1. This arrangement can minimize the overlap between the second touch sub-electrode4211and the second connection electrode422, thereby reducing the capacitive load on the touch sub-electrode and improving the touch sensitivity.

It should be noted that, inFIG.4A, the first metal grid layer50is closer to the viewer in a direction perpendicular to the base substrate21, so as to avoid the problem that more first metal grids being close to pixel structures of the display structure affects the operation of the pixel structures. Therefore, the edge second metal line61ais shielded by the edge first metal line Ma, and the edge second metal line61aand the edge first metal line51acan be distinguished in combination withFIG.5andFIG.6A.

FIG.4Cis a schematic diagram of a vertex of the second metal grid without a via and a vertex of the second metal grid with a via,FIG.4Dis a cross-sectional view ofFIG.4Ataken along a section line D-D′, and specific details of the display structure are omitted inFIG.4CandFIG.4D.

For example, the left region ofFIG.4Cshows an example of the vertex03(corresponding to the vertex53of the first grid layer) of the second metal grid62without a via, and the right region shows an example of the vertex63a(corresponding to the vertex53aof the first grid layer) of the second metal grid62with a via71. As shown inFIG.4C, in order to enable the second metal line61to form good contact with the first metal line51through the via71at the connection vertex01, a metal contact pad65with a large area at at least one of the vertexes01/02/04/05is formed in the second metal grid layer60, resulting in the occupied area of the vertex being larger than the occupied area of the original vertex03. Similarly, the first metal grid layer50also forms a metal contact pad with a large area at the vertex53a. For example, the shape of the metal contact pad is rectangular or circular, and the size (average length of edges or diameter) of the metal contact pad is more than twice that of the first metal line51or the second metal line61. Therefore, the arrangement of the via71causes the overlapping area of the first metal line51and the second metal line62to become larger.

Through the above arrangements, each connection vertex can generate an effective electrical signal transmission channel, so as to minimize the arrangement of the metal contact pad and reduce the area of the metal layer. In this way, on the one hand, the self-capacitance of the second connection electrode422can be reduced, and on the other hand, the overlapping area of the first metal line51and the second metal line52can be reduced, so that at least from these two aspects, the capacitive load of the touch sub-electrode can be reduced, and therefore the touch sensitivity can be improved.

The effective channel can be understood as a necessary first metal line51that is directly connected to the vertex53aand enables the via71corresponding to the vertex53ato transmit the touch signal on the second touch sub-electrode421to the second connection electrode422. Therefore, the first metal line51connected between two adjacent vertices53ais not an effective channel, because the touch signal can be transmitted to the second connection electrode422through the via71corresponding to the vertex53awhen the touch signal reaches any vertex53a, without passing through the first metal line51that does not have to pass through.

For example, for each second connection electrode422, the number of the vertex of the second metal grid of the first metal grid row1overlapped with the edge first metal grid52ais not less than 5, and the number of the connection vertex is not less than 3.

For example, the first metal line51directly connected to the vertex of the first metal line51corresponding to each connection vertex is complete, that is, the above first metal line51connected between the two vertices of the first metal grid52does not have a space or an opening in the middle. For example, the first metal grid52where the vertex of the first metal line51corresponding to each connection vertex is located is complete, that is, all the first metal lines51in the first metal grid52are complete, that is, all the first metal lines51in the first metal grid52does not have a space or an opening. This arrangement can improve the transmission efficiency and effectiveness of the touch signal input from the second touch sub-electrode421to the second connection electrode422.

For example, as shown inFIG.4D, the average line width X1of the first metal line51is larger than the average line width X2of the second metal line61. For example, in the width direction of the metal line, the orthographic projection of the second metal line61on the base substrate21is located within the orthographic projection of the first metal line51on the base substrate21, which can effectively improve the opening ratio of the display substrate.

For example, as shown inFIG.4A,FIG.5andFIG.6A, each of the plurality of second connection electrodes422further includes a third metal grid row3and a fourth metal grid row4that are arranged in the second direction D2. The third metal grid row3is located on the side of the second metal grid row4away from the first metal grid row1, and includes a plurality of second metal grids62arranged along the first direction D1; the fourth metal grid row4is located on the side of the third metal grid row3close to the second metal grid row2and adjacent to and connected with the third metal grid row3, the fourth metal grid row4includes at least one second metal grid62arranged along the first direction D1. The number of the second metal grid62in the fourth metal grid row4is less than the number of the second metal grid in the third metal grid row3, and all the second metal lines612of the second metal grid62in the fourth metal grid row4close to the third metal grid row3are sharing second metal lines612shared with the second metal grid62in the third metal grid row3.

For example, in some other embodiments, for example, as shown inFIG.6C, the number of the second metal grid62in the fourth metal grid row4is equal to the number of the second metal grid in the third metal grid row3, and all the second metal lines612of the second metal grid62in the fourth metal grid row4close to the third metal grid row3are sharing second metal lines612shared with the second metal grid62in the third metal grid row3. The pattern of the first metal grid is designed corresponding to the second metal grid shown inFIG.6C, as long as the same conditions in the previous embodiment are met.

In the touch structure40provided by the embodiments of the present disclosure, because all the second metal lines61of the second metal grid62in the fourth metal grid row4close to the third metal grid row3are sharing second metal lines612shared with the second metal grid62in the third metal grid row3, in addition to the sharing second metal lines61shared with the third metal grid row3, there is no additional second metal line overlapping with the first metal line51in the second metal lines of the fourth metal grid row4close to the first metal grid row1. Therefore, the overlapping area of the first metal line51and the second metal line61is reduced, and the overlapping area of the first touch electrode410and the second touch electrode420is reduced, so as to further achieve the technical effect of reducing the mutual capacitance value between the first touch electrode410and the second touch electrode420, reducing the power consumption of the touch circuit and reducing the probability of short circuit between the first metal line51and the second metal line61.

For example, the second metal grid62of the third metal grid row3is a second edge second metal grid of the second connection electrode422at a second edge of the second connection electrode422, which is located at the second end of the second connection electrode422in the second direction and is electrically connected with the edge first metal grid of the second touch sub-electrode4212adjacent to the third metal grid row3, and the second end is opposite to the first end in the second direction D2. That is, the edge second metal line61bof the second metal grid62of the third metal grid row3is connected with the edge first metal line51b, closest to the third metal grid row3, of the second touch sub-electrode4212adjacent to the third metal grid row3. This arrangement can minimize the overlapping area between the second touch sub-electrode4212and the second connection electrode422, thereby reducing the capacitive load on the touch sub-electrode and improving the touch sensitivity.

For example, as shown inFIG.4A, the plurality of vias further include a second via72, and the third metal grid row3is electrically connected with the other electrode4212of the two second touch sub-electrodes adjacent to the second connection electrode422where the third metal grid row3is located through the second via.

For example, as shown inFIG.4A, the orthographic projections of the plurality of second metal lines61of the second metal grid62of the third metal grid row3on the first metal grid layer50respectively overlap with the plurality of first metal lines51of the first metal grid52of the second touch sub-electrode421, so that the second metal grid62has a plurality of vertices overlapped with the first metal grid52. For example, in this embodiment, the number of the plurality of vertices in the third metal grid row3is 5, which are respectively a sixth vertex01′, a seventh vertex02′, an eighth vertex03′, a ninth vertex04′ and a tenth vertex05′. The plurality of vertices include a plurality of second connection vertices, the second vias72are correspondingly arranged at the plurality of connection vertices, that is, the plurality of second vias72and the plurality of second connection vertices are arranged in one-to-one correspondence. The vertices of the second metal grid62provided with the second vias72are called the second connection vertices.

The setting mode of the second via72is similar to the setting mode of the first via71, please refer to the descriptions of the relevant features of the first via71.

Combined withFIG.4AandFIG.5, for example, the orthographic projection of the sharing second metal line612shared with the second metal grid62in the third metal grid row3on the first metal grid layer50does not overlap with the first metal line51, that is, the first metal line51is not provided at the position of the first metal layer50corresponding to the sharing second metal line612, so as to minimize the overlapping area of the first metal line51and the second metal line62and avoid the problem caused by the large overlapping area of the two.

Of course, in other embodiments, the orthographic projection of the sharing second metal line612on the first metal grid layer50may also overlap with the first metal line51, so that the display panel or display device using the touch structure40has a high opening ratio on the basis of minimizing the overlapping area of the first metal line51and the second metal line62.

The number of the second metal grid in the third metal grid row is 2, and the number of the second metal grid in the fourth metal grid row is 1, so as to minimize the overlapping area between the first metal line51and the second metal line62on the basis of ensuring that the signal can be transmitted through the second connection electrode422. In this case, each second electrode422includes at least two electrical signal transmission channels along the second direction D2.

For example, the second connection electrode422further includes at least one intermediate metal grid row located between the second metal grid row2and the fourth metal grid row4, and each row of the at least one intermediate metal grid row includes at least one second metal grid62. For example, in this embodiment, the number of the at least one intermediate metal grid row is 1, that is, the fifth grid row5. The fifth grid row5is adjacent to and connected with both the second metal grid row2and the fourth metal grid row4.

For example, the number of the second metal grid in each row of the at least one intermediate metal grid row is 1. For example, the fifth grid row5has only one second metal grid, so that the second connection electrode422includes as few second metal grids as possible, while ensuring that the fifth grid row5provides the at least two electrical signal transmission channels along the second direction D2, and therefore the overlapping area between the first metal line51and the second metal line62is minimized.

For example, the pattern of each of the plurality of second connection electrodes422is symmetrical with respect to the symmetry axis along the first direction D1, so as to facilitate the uniformity of touch signal transmission conducted through the second connection electrode422.

For example, each second metal grid62includes at least two vertical edges61calong the second direction D2, so as to ensure that each row of the second metal grid can provide at least two electrical signal transmission channels along the second direction D2. In this way, when a certain vertical edge61chas the risk of disconnection, the occurrence of bad touch points can be prevented, thereby ensuring the reliability of the touch function. For example, the orthographic projections of the at least two vertical edges61con the first metal grid layer50do not overlap with the first metal line51, so as to minimize the overlapping amount between the first metal line51and the second metal line62.

For example, as shown inFIG.4AandFIG.6A, the adjacent second touch sub-electrodes4211and4212are electrically connected through two second connection electrodes422, that is, a second connection electrode422on the left and a second connection electrode422on the right inFIG.6A. The two second connection electrodes422are spaced apart from each other. In combination withFIG.4AandFIG.5, the orthographic projection of each of the plurality of first connection electrodes412on the second metal grid layer60is located in the gap between two second connection electrodes422connecting the adjacent two second touch sub-electrodes4211and4212.

In combination withFIG.4AandFIG.5, for example, each of the plurality of first touch sub-electrodes421is electrically connected with the adjacent first connection electrode412through at least one first connection line464constituted by a plurality of first metal lines51that are connected head to tail in sequence. The orthographic projection of the first connection line461on the second metal grid layer60overlaps with a plurality of second metal lines of the second connection electrode422respectively, and at least partially overlaps with the orthographic projection of the sharing second metal line611on the first metal grid layer50. For example, in the embodiments shown inFIG.4A,FIG.5andFIG.6A, the first touch sub-electrode411on the left in theFIG.5is electrically connected with the first connection electrode412through three first connection lines4611,4612and4613, and a part of the orthographic projection of the first connection line4611on the second metal grid layer60overlaps with the sharing second metal line611shared by the first metal grid row1and the second metal grid row2of the second connection electrode422on the left in theFIG.4A, so as to reduce the overlapping area of the first metal line51and the second metal line62as much as possible and avoid the problem caused by the large overlapping area of the two. The first touch sub-electrode411on the right in theFIG.5is electrically connected with the first connection electrode412through a plurality of second connection lines462. Each second connection line is constituted by a plurality of first metal line51connected from head to tail in sequence, similar to each first connection line. For example, the first touch sub-electrode411on the right in theFIG.5is electrically connected with the first connection electrode412through three second connection lines4621,4622and4623, and a part of the orthographic projection of the second connection line4621on the second metal grid layer60overlaps with the sharing second metal line611shared by the first metal grid row1and the second metal grid row2of the second connection electrode422on the right in theFIG.4A, so as to reduce the overlapping area of the first metal line51and the second metal line62as much as possible, and avoid the problem caused by the large overlapping area of the two.

For example, in the embodiment, at the position of the first metal layer50corresponding to the sharing second metal line612of the third metal grid row3of the second connection electrode422, there is no first connection line and the second connection line612that overlap with the sharing second metal line612, so as to minimize the overlapping amount between the first metal line51and the second metal line62. Of course, in other embodiments, the first connection line and the second connection line may at least partially overlap with the orthographic projection of the sharing second metal line612on the first metal layer50.

For example, as shown inFIG.6A, a, b, c, d, e, and f respectively represent a plurality of edges of different second metal grids62. For example, the length relationship of these edges is: a<e<c, f<d<b. For example, the second grid lines of the second metal grid layer402inFIG.6Athat overlap with the first metal line are respectively the grid lines a, b, c, d, e, f marked in theFIG.6A. In the case that the number of second metal lines61overlapping with the first metal line51is equal, the sum of the lengths of these second grid lines overlapping with the first metal line in the embodiment of the present disclosure is the smallest. According to the length of each edge of the second metal grid62and each edge of the first metal grid52, the position of the second metal grid62is designed in a way that the overlapping length is the smallest, so that the sum of the length of the second grid line overlapping with the first metal line is the smallest on the basis of satisfying the conditions described above. Of course, in other embodiments, the position of the second grid line overlapping with the first metal line may be different from that inFIG.4A, but the sum of the length of the second grid line overlapping with the first metal line may still be minimized by design.

For example, the plurality of first metal lines located in the boundary region between the adjacent first touch sub-electrode and the second touch sub-electrode respectively include a plurality of openings. Each of the plurality of openings divides the first metal line into two first metal segments. One of the two first metal segments belongs to the first touch sub-electrode and the other belongs to the second touch sub-electrode, so that the adjacent first touch sub-electrode and the second touch sub-electrode are insulated.

For example,FIG.7AandFIG.7Brespectively show two examples of the enlarged schematic diagram of a region B inFIG.2. The region B involves two first touch sub-electrodes411adjacent and insulated in the second direction D2and two second touch sub-electrodes421adjacent and insulated in the first direction D1. The region B is the isolation region of the four touch sub-electrodes.

The metal grids shown inFIG.7Aare all located in the first metal grid layer, that is, they are all the first metal grids, in which the light grid represents the first metal grid in the two adjacent first touch sub-electrodes411, and the dark grid represents the first metal grid in the two adjacent second touch sub-electrodes421.

As shown inFIG.7A, the first touch sub-electrode411and the second touch sub-electrode421are adjacent to each other. The plurality of first metal lines51located in the boundary region between the two include a plurality of openings510. For example, each space510is located in the middle of the first metal line51, that is, each space510is located in the middle of one edge of the first metal grid52, and separates the first metal line51into two first metal line segments51f, one of the two first metal segments51fbelongs to the first touch sub-electrode411and the other belongs to the second touch sub-electrode421, so that the adjacent first touch sub-electrode411and the second touch sub-electrode421are insulated.

It should be noted that, in the embodiments of the present disclosure, the first metal segment belonging to the touch sub-electrode means that there is an electrical connection between the first metal segment and the touch sub-electrode.

In the touch structure provided by at least one embodiment of the present disclosure, the adjacent and insulated touch sub-electrodes (for example, between the adjacent first touch sub-electrode and the second touch sub-electrode, between the two adjacent second touch sub-electrodes in the first direction, and between the two adjacent first touch sub-electrodes in the second direction) are insulated from each other through the space formed by the disconnected metal line; compared with realizing insulation by setting dummy electrodes, this arrangement can maximize the arrangement area of the touch electrode, improve the density of the touch electrode, and thus improve the touch sensitivity.

For example, as shown inFIG.7A, the edge metal grid of each touch sub-electrode is incomplete, that is, the edge metal grid of each touch sub-electrode includes a part of the first metal grid, and the edge metal grids in adjacent touch sub-electrodes match each other to define the first metal grid.

For example, at least one first metal grid includes three first metal grid parts insulated from each other, the three first metal grid parts respectively belong to one first touch sub-electrode and two adjacent second touch sub-electrodes in the first direction D1. For example, the shape of the first metal grid is hexagonal, and at least two first metal grids include the above-mentioned three first metal grid parts that are insulated from each other.

As shown inFIG.7AandFIG.7B, inFIG.7AandFIG.7B, each of the two first metal grids52cin the dotted circle includes three first metal grid parts insulated from each other, the three first metal grid parts respectively belong to three touch sub-electrodes insulated from each other, the three touch sub-electrodes include two adjacent first touch sub-electrodes411adjacent to each other in the second direction D2and a second touch sub-electrode421(as shown inFIG.7A) located between the two adjacent first touch sub-electrodes, or the three touch sub-electrodes include two adjacent second touch sub-electrodes421adjacent to each other in the first direction D1and a first touch sub-electrode411located between the two adjacent second touch sub-electrodes421(as shown inFIG.7B). This design makes the arrangement of touch sub-electrodes more compact while being effectively insulated, thus improving the touch sensitivity.

For example, as shown inFIG.7AandFIG.7B, there is an opening510on each edge of three edges of each metal grid52c, so that the metal grid is divided into three parts that are insulated from each other.

For example, as shown inFIG.7AandFIG.7B, the shape of the first metal grid52cis a polygon, such as a hexagon, the hexagon includes two edges parallel to the second direction D2and opposite to each other. The first metal line51on at least one edge of the first metal grid52chas an opening which separates the first metal line into two first metal line segments51f. For example, as shown inFIG.7A, the two first metal segments51frespectively belong to two first touch sub-electrodes411adjacent to each other in the second direction D2. For another example, as shown inFIG.7B, the two first metal segments51frespectively belong to the adjacent first touch sub-electrode411and the second touch sub-electrode421.

For example, as shown inFIG.7AandFIG.7B, the polygons of two first metal grides52cshare one edge, that is, the two first metal grids52cshare one first metal line51g, and there is an opening520on the first metal line51g, the opening520separates the first metal line51ginto two first metal segments that are spaced apart from each other.

For example, as shown inFIG.7A, the two first metal grids52care arranged along the first direction D1, and the first metal line51gshared by the two first metal grids52cis parallel to the second direction D2. The two first metal segments of the shared first metal line51grespectively belong to two first touch sub-electrodes411adjacent to each other in the second direction D2; that is, the two adjacent first touch sub-electrodes411in the second direction D2are directly adjacent and separated from each other through the opening. For example, the two adjacent second touch sub-electrodes421adjacent to each other in the first direction D1are separated from each other by a part of the two adjacent first touch sub-electrodes411adjacent to each other in the second direction D2.

For example, as shown inFIG.7B, the arrangement direction of the two first metal grids52cis neither parallel nor perpendicular to the second direction D2, and the first metal line51gshared by the two first metal grids is neither parallel nor perpendicular to the second direction D2. The two first metal segments in the first metal line51gshared by the two first metal grids respectively belong to two adjacent second touch sub-electrodes421adjacent to each other in the first direction D1; that is, the two adjacent second touch sub-electrodes421adjacent to each other in the first direction D1are directly adjacent and are separated from each other through the opening. For example, the two adjacent first touch sub-electrodes411adjacent to each other in the second direction D2are separated from each other by a part of the two adjacent second touch sub-electrodes421adjacent to each other in the first direction D1.

For example, as shown inFIG.7AandFIG.7B, each of the three first metal line parts of one of the two first metal grids52cincludes a complete first metal line51which has no opening; and the number of the first metal lines included in the three first metal grid parts of the other one of the two first metal grids52cis different from each other, for example, the number is 0, 1, and 2, respectively.

As shown inFIG.7AandFIG.7B, each first metal grid part includes two first metal segments51f, or includes only two first metal segments51f, or includes a complete first metal line51and two first metal segments51f, and the first metal line51is connected between the two first metal segments, or may include two complete first metal lines51and two first metal segments51f, the two first metal lines51are connected between the two first metal segments51f.

In addition, in one first touch sub-electrode, one first metal grid is not necessarily in a complete closed shape. For example, as shown inFIG.5, in at least one first touch sub-electrode411, one edge of a part of the first metal grids52bhas an opening530. Alternatively, as shown inFIG.7C, in at least one first touch sub-electrode411, one edge of a part of the first metal grids52C is missing.

Similarly, in one second touch sub-electrode, one second metal grid is not necessarily in a complete closed shape. For example, as shown inFIG.7D, in one second touch sub-electrode421, one edge of a part of the second metal grids62has an opening620. Alternatively, in some embodiments, one edge of a part of the second metal grids62is missing. As long as the function of the second touch sub-electrode is not affected, and in some embodiments, the second grid row2is guaranteed to provide at least two electrical signal transmission channels along the second direction D2, for example, the at least two electrical signal transmission channels are respectively a first channel621and a second channel622represented by the gray lines inFIG.7D. Of course, the at least two electrical signal transmission channels are not unique, and are not limited to the case shown inFIG.7D.

FIG.6Bis a schematic diagram of another second touch electrode layer provided by an embodiment of the present disclosure. The second connection electrode shown inFIG.6Bhas the following differences from those inFIG.4AandFIG.6A. Each of the plurality of second connection electrodes further includes a third metal grid row3arranged in the second direction with the first metal grid row, the third metal grid row33is located on the side of the second metal grid row2away from the first metal grid row1and adjacent to the second metal grid row2, and includes a plurality of second metal grids62arranged along the first direction D1; the number of the second metal grid62in the second metal grid row2is less than the number of the second metal grid62in the third metal grid row3, and all the second metal lines612of the second metal grid62in the second metal grid row2close to the third metal grid row3are sharing second metal lines612shared with the second metal grid62in the third metal grid row3; the second metal grid62of the third metal grid row3is the second edge second metal grid of the second connection electrode422at a second edge of the second connection electrode422, which is located at the second end of the second connection electrode422in the second direction D2, and is electrically connected with the edge first metal grid of the second touch sub-electrode412adjacent to the third metal grid row3, and the second end is opposite to the first end in the second direction D2; the plurality of vias include a second via, and the third metal grid row3is electrically connected with the other one of the two second touch sub-electrodes421adjacent to the second connection electrode422through the second via. Other features of the second connection electrode shown inFIG.6B, such as the features and corresponding technical effects of the first metal grid row and the second metal grid row, are the same as those in the embodiments shown inFIG.4AandFIG.6A, and the previous descriptions can be referred to. In the case that the second metal grid layer60adopts the second connection electrode shown inFIG.6B, the pattern of the first metal grid layer50may be changed accordingly.

At least one embodiment of the present disclosure provides a touch structure, the touch structure includes a plurality of touch sub-electrodes spaced apart from each other, and a dummy electrode. The dummy electrode is embedded in at least one touch sub-electrode of the plurality of touch sub-electrodes and spaced apart from the touch sub-electrode in which the dummy electrode is embedded to insulate each other; the at least one touch sub-electrode comprises a strip-shaped channel and a main body part surrounding the dummy electrode and the channel, and the strip-shaped channel passes through the dummy electrode, and both two ends of the strip-shaped channel in an extension direction of the strip-shaped channel are connected with the main body part.

In at least one embodiment of the present disclosure, for example, in combination withFIG.2andFIG.8A, the touch structure40includes a dummy electrode430. The dummy electrode430is embedded in at least one touch sub-electrode of the plurality of touch sub-electrodes and is spaced apart from the touch sub-electrode where the dummy electrode430is located to insulate each other. The plurality of touch sub-electrodes are spaced apart from each other. For example, each touch sub-electrode is embedded with a dummy electrode430, or some of the plurality of touch sub-electrodes are respectively embedded with a dummy electrode430. InFIG.2, for example, the at least one touch sub-electrode is the second touch sub-electrode421. In other embodiments, for example, as shown inFIG.8A, the at least one touch sub-electrode may be the first touch sub-electrode411.

By providing the dummy electrode430spaced apart from the touch sub-electrode without electrical connection, the electrode area (effective area) of the touch electrode is reduced, and the capacitive load (self-capacitance) on the touch electrode is reduced, so that the load on the touch electrode is reduced and the touch sensitivity is improved. For example, the dummy electrode430is in a floating state, that is, it is not electrically connected to other structures or does not receive any electrical signals. However, in the dummy electrode430shown inFIG.2, there is no metal line of the touch sub-electrode, so the touch signal amount in the region provided with the dummy electrode430is small, which leads to the decline of the touch accuracy of the region and affects the touch performance of the electronic device adopting the touch structure, such as the display panel.

For example, in the touch structure provided by at least one embodiment of the present disclosure, as shown inFIG.8A, taking one first touch sub-electrode411as an example, the first touch sub-electrode includes a strip-shaped channel281and a main body part280surrounding the dummy electrode430and the channel281. The strip-shaped channel281passes through the dummy electrode, and both two ends281a/281bin the extension direction of the strip-shaped channel281are connected with the main body part280, the dummy electrode430includes a first part431and a second part432that are spaced apart by the strip-shaped channel281. The first part431and the second part432are both spaced apart from the first touch sub-electrode411to be insulated from the first touch sub-electrode411. InFIG.8A, the white region surrounding the first part431and the second part432of the dummy electrode430represents the space between the first part431and the first touch sub-electrode411, and the space between the second part432and the first touch sub-electrode411. In the touch structure, because the channel281passes through the dummy electrode430, the touch blind spot caused by the continuous arrangement of the dummy electrode can be avoided; at the same time, the channel281passing through the dummy electrode430forms an effective signal channel inside the dummy electrode to reduce the resistance of the touch electrode; moreover, the channel281passing through the dummy electrode430increases the touch signal amount of the region provided with the dummy electrode430, and therefore the touch accuracy of the region is improved, and thus the touch performance of the electronic device using the touch structure, such as the display panel, is improved.

As shown inFIG.8A, for example, the shape of the outer contour of the whole structure28constituted by the dummy electrode430and the strip-shaped channel281(that is, the plane shape of the whole structure28constituted by the dummy electrode430and the strip-shaped channel281) is a first polygon; for example, the first polygon is a regular polygon, such as a rectangle, a square, a parallelogram, a regular hexagon, and so on. Of course, the shape of the first polygon is not limited to the types listed above. The shape of the whole structure28constituted by the dummy electrode430and the strip-shaped channel281being polygon means that the jag of edges of the polygon are ignored, and the edges are allowed to be jagged, each edge of the first polygon is not required to be a strict straight line segment. For example, in some other embodiments, the shape of the outer contour of the whole structure28constituted by the dummy electrode430and the strip-shaped channel281may be other shapes such as a circle, which is not limited by the embodiments of the present disclosure.

For example, in some embodiments, as shown inFIG.8A, the two ends281a/281bof the channel281are respectively close to the two adjacent edges of the first polygon.

Alternatively, in some embodiments, as shown inFIG.8B, the two ends281a/281bof the channel281are respectively close to the two opposite edges of the first polygon. In this way, the channel281passes through the dummy electrode430more comprehensively, achieving a better technical effect of improving the touch accuracy of the region provided with the dummy electrode430. Other features of the first touch sub-electrode shown inFIG.8Bthat are not mentioned are the same as those inFIG.8A, please refer to the descriptions ofFIG.8A.

Alternatively, in some embodiments, as shown inFIG.8C, two ends281a/281bof the channel281are respectively close to two non-adjacent vertices of the first polygon. Other features of the first touch sub-electrode shown inFIG.8Cthat are not mentioned are the same as those inFIG.8A, please refer to the descriptions ofFIG.8A.

For example, as shown inFIG.8A, the shape of the outer contour of the main body part280is a second polygon, and the second polygon and the first polygon are similar polygons. That is, the number of edges of the second polygon and the first polygon are the same, and the corresponding angles are basically the same, and the corresponding edges are basically proportional. In this way, the shape of the whole structure28constituted by the dummy electrode430and all the channels can be consistent with the shape of the outer contour of the main body part280, so that the touch performance of the entire touch structure has better uniformity, and it is convenient for patterning and reduces the mask manufacturing cost.

For example, as shown inFIG.8A, the shape of the outer contour of the whole structure28constituted by the dummy electrode430and all channels is the first polygon, such as a rectangle, and the channel281is parallel to two edges of the first polygon, that is, the rectangle.

For example, the strip-shaped channel281is in a straight strip shape as a whole, for example, it is in a strip shape extending along a straight line as a whole. In the extension direction of the straight strip, the width of the straight strip may be consistent, for example, as shown inFIG.8I, it may be partially consistent, for example, as shown inFIG.8G. In other embodiments, at least part of the strip-shaped channel is a curved strip-shaped channel, for example, the entire channel is a curved strip-shaped channel, or at least one channel is a curved strip-shaped channel in the following case that there are a plurality of channels. Alternatively, in some embodiments, at least some of the strip-shaped channels are in a fold-line shape, for example, the entire channel is in a fold-line shape, or in the following case that there are a plurality of channels, at least one channel is in a fold-line shape.

In some embodiments, for example, as shown inFIG.8D, one first touch sub-electrode411includes a plurality of strip-shaped channels, and the plurality of strip-shaped channels includes a strip-shaped first channel281and a strip-shaped second channel282. The strip-shaped first channel281extends substantially along the first extension direction (for example, the third direction D3); the strip-shaped second channel282extends substantially along the second extension direction (for example, the fourth direction D4) and intersects with the first channel281. That is, both the extension direction of the first channel281and the extension direction of the second channel282intersect with the arrangement direction of the first touch sub-electrode411and the arrangement direction of the second touch sub-electrode421. The dummy electrode430includes four parts spaced apart from each other by the first channel281and the second channel282, which are a first part281, a second part282, a third part283and a fourth part284, respectively. It should be noted that different parts of a channel may not be located on one straight line, and the whole channel may not be a straight line with uniform width. Compared with the case that one first touch sub-electrode411includes one strip-shaped channel, the case that one first touch sub-electrode411includes the first channel281and the second channel282that intersect each other can further increase the amount of touch signals of the region provided with the dummy electrode430in multiple directions, improve the touch accuracy of the region, and thus improve the touch performance of the electronic device adopting the touch structure, such as the display panel.

For example, the first channel281and the second channel282that intersect each other are in a shape of a Chinese character “+”, and both the first extension direction and the second extension direction respectively has an included angle of 45 degrees with both the first direction D1(the arrangement direction of the first touch sub-electrode411) and the second direction D2(the arrangement direction of the second touch sub-electrode421), so that the region provided with the dummy electrode430has a relatively uniform touch accuracy. For example, the two ends281a/281bof the first channel281are respectively close to two opposite edges of the first polygon (rectangle), and the two ends282a/282bof the second channel282are respectively close to the other two opposite edges of the first polygon (rectangle); the sizes and shapes of the first part281, the second part282, the third part283and the fourth part284are the same as each other, so as to further make the region provided with the dummy electrode430have more uniform touch accuracy. Other features of the first touch sub-electrode shown inFIG.8Dthat are not mentioned are the same as those inFIG.8A, please refer to the descriptions ofFIG.8A.

For example, inFIG.8D, the shapes of the first part281, the second part282, the third part283, and the fourth part284are all rectangles, such as squares. For example, as shown inFIG.8E, the shape of the overall outer contour of the whole structure constituted by the dummy electrode430and the strip-shaped channel is irregular; all the shapes of the first part281, the second part282, the third part283and the fourth part284include at least two strip-shaped parts respectively extending in different directions, for example, all the shapes of the at least two strip-shaped parts are irregular.

For example, in other embodiments, at least one first touch sub-electrode411includes a plurality of strip-shaped channels, and the plurality of strip-shaped channels include: a plurality of strip-shaped first channels and a plurality of strip-shaped second channels, and the plurality of strip-shaped first channels extend substantially along the first extension direction and are spaced apart from each other; the plurality of strip-shaped second channels extend substantially along the second extension direction and are spaced apart from each other, and each of the plurality of strip-shaped second channels intersects each of the plurality of strip-shaped first channels. The dummy electrode includes a plurality of parts separated from each other by the plurality of strip-shaped first channels and the plurality of strip-shaped second channels.

Exemplarily, as shown inFIG.8F, for example, at least one first touch sub-electrode411includes two strip-shaped first channels281and two strip-shaped second channels282, that is, the plurality of strip-shaped first channels includes two first channels281, and the plurality of strip-shaped second channels include two second channels282. The dummy electrode430includes at least nine parts separated from each other by two first channels281and two second channels282, and the at least nine parts are a first part431, a second part432, a third part433, a fourth part434, a fifth part435, a sixth part436, a seventh part437, an eighth part438and a ninth part439, respectively.

For example, as shown inFIG.8F, the ratio l/L1of the maximum size of the region crossed by the entire dummy electrode430(including, for example, the first part to the ninth part in this embodiment) to the maximum size of the first touch sub-electrode411where the dummy electrode is located in the same direction is greater than or equal to 0.4 and less than or equal to 0.6. The test shows that if the value of l/L1is too large, too much space is occupied and the effective touch area is reduced; and if the value of l/L1is too small, the load on the touch electrode cannot be effectively reduced and the touch sensitivity cannot be effectively improved, and in the case that the value of l/L1is greater than or equal to 0.4 and less than or equal to 0.6, the best effect of improving the touch accuracy and reducing the load on the touch electrode can be achieved. For example, the outer contour of the main body part280of the first touch sub-electrode411is rectangular. The outer contour of the main body part280includes a first edge291aand a second edge291bthat intersect each other. The first edge291aand the second edge291brespectively extend along the third direction D3and the fourth direction D4. The third direction D3and the fourth direction D4are different, for example, they are orthogonal. For example, the third direction D3is different from the first direction D1or the second direction D2; and the fourth direction D4is different from the first direction D1or the second direction D2.

For example, the third direction D3has an angle of 45 degrees with both the first direction D1and the second direction D2, and the fourth direction D4has an angle of 45 degrees with both the first direction D1and the second direction D2.

For example, the same direction in the above description “maximum size . . . in the same direction” is the third direction D3, or the same direction may also be the fourth direction D4. For example, the maximum size1in the third direction D3of the region crossed by the entire dummy electrode430and the maximum size L1in the third direction D3of the first touch sub-electrode411where the dummy electrode is located are respectively equal to the maximum size in the fourth direction D4of the region crossed by the entire dummy electrode430and the maximum size L2in the fourth direction D4of the first touch sub-electrode411where the dummy electrode is located. In this case, for example, the shape of the outer contour of the main body part280is square, so as to obtain uniform touch accuracy in the third direction D3and the fourth direction D4, thereby improving the touch accuracy uniformity of the entire touch structure.

For example, the ratio of the minimum width d of each channel (for example, each first channel281) to the maximum size1of the region crossed by the entire dummy electrode430(for example, including the first part to the ninth part in this embodiment) is greater than or equal to 0.03 and less than or equal to 0.1. For example, the width of each second channel282is substantially uniform, and the minimum width of the second channel282is substantially a fixed value. For another example, in other embodiments, for at least one second channel282, the width of the second channel282is inconsistent along the extension direction of the second channel282, and the minimum width of one second channel282is the minimum of its multiple different widths.

It should be noted that the direction of the width or the width direction of the channel at a certain position is perpendicular to the extension direction of the channel at this position.

For example, in some embodiments, l=1411 μm, d=78 μm, L1=L2=3308 μm. Of course, the embodiments of the present disclosure do not limit the specific values of the above sizes, which can be designed according to specific needs.

For example, for each touch sub-electrode, the effective area accounts for 52%-64% of the total area of the touch sub-electrode, that is, the area of the dummy electrode430accounts for 36%-48% of the total area of the touch sub-electrode. If the proportion of the area of the dummy electrode430is too large, the resistance of the touch electrode would be increased. If the proportion of the area of the dummy electrode430is too small, the touch performance of the touch structure in the weak grounding state would not be effectively improved.

For example, as shown inFIGS.8A-8F, one first touch sub-electrode411further includes a plurality of interdigital structures440connected to the main body part280, and the plurality of interdigital structures440are distributed around the main body part280and each interdigital structure protrudes from the main body part280in a direction away from the main body part280. As shown inFIG.8F, the extension direction of each channel is parallel to the extension direction of a part of the interdigital structures440in the plurality of interdigital structures440, and the part of the interdigital structures respectively protrude from the two edges of the outer contour of the main body part280close to the two ends of the respective channel to facilitate patterning the first touch sub-electrode411and the dummy electrode430, and the patterns of the formed touch sub-pixels and dummy electrode are regular, which is conducive to improving the uniformity of the touch performance of the entire touch structure. For example, one first channel281is taken as an example here, and the same is suitable for at least one second channel282. The extension direction of one first channel281inFIG.8Fis parallel to the extension direction of a part of interdigital structures440in the plurality of interdigital structures440, the part of interdigital structures440respectively protrude from two edges291a/291bof the outer contour of the main body part280respectively close to the two ends281a/281bof the first channel281. Of course, the interdigital structures440may be provided on each edge of the outer contour of the main body part280, or may be provided only on a part of the edges of the outer contour of the main body part280. Alternatively, in other embodiments, the extension direction of at least one channel of one first touch sub-electrode411may not be parallel to the extension direction of the at least part of interdigital structures440, which is not limited in the present disclosure.

For example, as shown inFIG.8F, in the extension direction of one first channel281, the two ends281a/281bof the strip-shaped channel281at least partially overlap with the interdigital structures440respectively protruding from the two edges291a/291bof the main body part280respectively close to the two ends281a/281bof the first channel281(i.e., the two ends281a/281band the interdigital structures440respectively protruding from the two edges291a/291bhave parts directly opposite to each other), and edges281c/281dof the first channel281along the extension direction of the first channel281are parallel to the edges441/442of the at least part of interdigital structures440. The edges281cand281dof the first channel281along the extension direction of the first channel281are opposite to each other, and the edges441and442of the one interdigital structure440are opposite to each other.

In some embodiments, for example, as shown inFIG.8F, the shape of the overall outer contour of the whole structure constituted by the dummy electrode430, the plurality of first channels281and the plurality of second channels282is an irregular polygon, so as to avoid the overall pattern of the dummy electrode430being a regular pattern, avoid that the shape of the overall outer contour of the above-mentioned whole structure is the same as the shape of the display pixel unit of the display panel adopting the touch control structure, and facilitate the elimination of moire. The first end and the second end of the outer contour of the dummy electrode430that are opposite to each other in the second direction D2are respectively opposite to two second connection electrodes adjacent in the second direction D2(refer toFIG.2), and respectively have a first groove4301and a second groove4303; the first groove4301is recessed toward the second end of the outer contour of the dummy electrode430, and the second groove4303is recessed toward the first end of the outer contour of the dummy electrode430. The third end and the fourth end of the outer contour of the dummy electrode430that are opposite each other in the first direction D1are respectively opposite to the first connection electrode (refer toFIG.2), and respectively have a third groove4305and a fourth groove4307; the third groove4305is recessed toward the fourth end, and the fourth groove4307is recessed toward the third end. For example, the outer contour of the dummy electrode430includes a first protrusion4302in the first groove4301, a second protrusion4304in the second groove4303, a third protrusion4306in the third groove4305, and a fourth protrusion4308in the fourth groove4307. The first protrusion4302protrudes in a direction away from the second end of the outer contour of the dummy electrode430, and the second protrusion4304protrudes in a direction away from the first end of the outer contour of the dummy electrode430; the third protrusion4306protrudes in a direction away from the fourth end, and the fourth protrusion4308protrudes in a direction away from the third end. The groove and protrusion design of the outer contour of the dummy electrode430can obtain a better technical effect of eliminating the moire.

In other embodiments, for example, as shown inFIG.8G, at least one touch sub-electrode includes a plurality of the strip-shaped channels, and the plurality of strip-shaped channels include a plurality of strip-shaped first channels281and a plurality of strip-shaped second channels282. The plurality of strip-shaped first channels281extend substantially along the first extension direction (for example, the third direction D3) and are spaced apart from each other. The plurality of strip-shaped second channels282extend substantially along the second extension direction (for example, the fourth direction D4) and are paced apart from each other, and each of the plurality of strip-shaped second channels282intersects each of the plurality of strip-shaped first channels281; the dummy electrode430includes a plurality of parts separated from each other by the plurality of strip-shaped first channels281and the plurality of strip-shaped second channels282.

In combination withFIG.8GandFIG.8H, one first channel281includes a plurality of narrow parts2811and a plurality of wide parts2810alternately arranged and sequentially connected in the extension direction of the one first channel281, and the width w1of each narrow part2811in the direction perpendicular to the extension direction of the first channel281is less than the width w2of each wide part2810in the direction perpendicular to the extension direction of the first channel281, to avoid the possible shadow elimination problem caused by the entire dummy electrode430being disconnected by the continuous channel with the same width. One second channel282includes a plurality of narrow parts2821and a plurality of wide parts2820alternately arranged and sequentially connected in the extension direction of the one second channel282, and the width of each narrow part2821in the direction perpendicular to the extension direction of the second channel282is less than the width of each wide part2820in the direction perpendicular to the extension direction of the second channel282, to avoid the possible shadow elimination problem caused by the entire dummy electrode430being disconnected by the continuous channel with the same width. It should be noted that the width w1here refers to the average width of the narrow part2811, and the width w2refers to the average width of the wide part2810. Similarly, this is suitable for the narrow part of the second channel282and the wide part of the second channel282.

It should be noted that the feature like “the plurality of narrow parts and the plurality of wide parts of one first channel281are alternately arranged” means that the plurality of narrow parts include a first narrow part, a second narrow part and a third narrow part, and the plurality of wide parts include a first wide part and a second wide part; the first wide part and the second wide part are respectively located on two sides of the first narrow part and both are adjacent to the first narrow part, the second narrow part is located on the side of the first wide part away from the first narrow part and adjacent to the first wide part, and the third narrow part is located on the side of the second wide part away from the first narrow part and adjacent to the second wide part. The same is suitable for the alternating arrangement of the plurality of narrow parts and the plurality of wide parts of the second channel282.

For example, the narrow part2811of the first channel281intersects with the narrow part2821of the second channel282. In this way, the size of the channel at the intersection of the first channel281and the second channel282cannot be too large, so as to avoid the phenomenon that the channel is too wide at the intersection and is too narrow at the narrow part, and avoid uneven touch accuracy in the entire region where the dummy electrode430is arranged.

For example, as shown inFIG.8GandFIG.8H, the narrow part2811of the first channel281and the narrow part2821of the second channel282have an intersection (that is, the position indicated by the dotted circle inFIG.8H). The first channel281includes a first wide part2810aand a second wide part2810brespectively located on two sides of the intersection and adjacent to the intersection, the second channel282includes a third wide part2820aand a fourth wide part2820blocated on two sides of the intersection and adjacent to the intersection; the distances respectively from the first wide part2810a, the second wide part2810b, the third wide part2820aand the fourth wide part2820bto the intersection are equal, so as to improve uniformity and reliability of the touch accuracy of the entire region where the dummy electrode430is arranged, and enable the entire touch structure to have more uniform and stable touch performance.

For example, for the first channel281, the ratio of the length11of the narrow part2811in the extension direction of the first channel281to the width w/of the narrow part2811is greater than the ratio of the length12of the wide part2810in the extension direction of the first channel281to the width w2of the wide part2810. Similarly, for the second channel282, the ratio of the length of the narrow part2821in the extension direction of the second channel282to the width of the narrow part2821is greater than the ratio of the length of the wide part2820in the extension direction of the second channel282to the width of the wide part2820.

For example, for the first channel281, the length of the narrow part2811is equal to or not equal to the length of the wide part2810. In these two cases, the above conditions for the length-width ratio of the narrow part and the wide part of the first channel281can be satisfied; similarly, for example, for the second channel282, the length of the narrow part2821is equal to or not equal to the length of the wide part2820. In these two cases, the above conditions for the length-width ratio of the narrow part and the wide part of the second channel282can be satisfied.

For example, as shown inFIG.8GandFIG.8H, for the first channel281, the plurality of wide parts2810are arranged at equal intervals, and the lengths of the plurality of narrow parts2811are equal to each other; for the second channel282, the plurality of wide parts2820are arranged at equal intervals, and the lengths of the plurality of narrow parts2821are equal to each other.

For example, as shown inFIG.2, the touch structure40provided by the embodiments of the present disclosure includes a first electrode layer and a second electrode layer. An insulation layer is arranged between the first electrode layer and the second electrode layer; the plurality of touch sub-electrodes include a plurality of first touch sub-electrodes411and a plurality of second touch sub-electrodes421, and the touch structure40further includes a plurality of first connection electrodes412and a plurality of second connection electrodes (not shown inFIG.2, the position of the plurality of second connection electrodes is the same as the position of the second connection electrodes in the previous embodiment); the plurality of first touch sub-electrodes411and the plurality of first connection electrodes412are all located in the first electrode layer and arranged along the first direction D1, the plurality of first touch sub-electrodes411and the plurality of first connection electrodes412are alternately distributed one by one and electrically connected in sequence, to form a first touch electrode410extending along the first direction D1; the plurality of second touch sub-electrodes421are located in the first electrode layer, and are arranged in sequence along the second direction D2and spaced apart from each other, the first direction D1intersects the second direction D2, and each of the plurality of first touch sub-electrodes411and each of the plurality of second touch sub-electrodes421are spaced apart from each other; the plurality of second connection electrodes are located in the second electrode layer and are spaced apart from each other. Each of the plurality of second connection electrodes is electrically connected with the adjacent second touch sub-electrodes through vias in the insulation layer, so as to electrically connect the adjacent second touch sub-electrodes421to form a second touch electrode421extending in the second direction D2. The dummy electrode430is embedded in the first touch sub-electrode411and/or in the second touch sub-electrode421. For example, the dummy electrode430may be any one dummy electrode of the above embodiments. Moreover, it should be noted that the first touch sub-electrode411shown inFIGS.8A-8Gmay be in the touch structure40provided by any one of the above embodiments.

FIG.8Iis an eighth structural diagram of a dummy electrode embedded in a touch self-electrode provided by an embodiment of the present disclosure, andFIG.8Jis an enlarged schematic diagram of a part F inFIG.8I. The difference between the embodiment shown inFIG.8Iand the embodiment shown inFIG.8Fis that, as shown inFIG.8I, at least one touch sub-electrode includes a communication part285, and the plurality of strip-shaped channels281/282are electrically connected to each other through the communication part285, the plurality of parts of the dummy electrode, such as the first part431, the second part432, the third part433, the fourth part434, the fifth part435, the sixth part436, the seventh part437, and the eighth part438, surround the communication part285. In this way, compared with the case that the communication part is not provided, the communication between the plurality of channels281/282is better, which is conducive to improving the accuracy and reliability of touch control.

In some embodiments, for example, as shown inFIG.9A, the first electrode layer and the second electrode layer are respectively the above first metal grid layer and the second metal grid layer. Thus, the plurality of touch sub-electrodes and the dummy electrode430are located in the first metal grid layer, that is, the plurality of touch sub-electrodes and the dummy electrode are located in the same metal grid layer. Each part of the main body part280, each channel281/282and the dummy electrode430respectively includes a plurality of first metal grids52. For example, each of the plurality of parts of the dummy electrode430that are separated from each other by the channels includes a plurality of first metal grids52connected with each other.

For example, as shown inFIG.8I, the communication part285further includes a plurality of first metal grids52. For example, the first metal grids52of the plurality of strip-shaped channels281/282and the first metal grids52of the communication part285are connected with each other, so that the plurality of strip-shaped channels281/282are electrically connected with each other through the communication part285.

For example, as shown inFIG.9A, in at least one touch sub-electrode embedded with the dummy electrode430, each part of the dummy electrode430has a boundary region with the first touch sub-electrode411. Schematically, the boundary region is a white region surrounding each part of the dummy electrode430inFIGS.8A-8H.FIG.9Bis an enlarged schematic diagram of a part D inFIG.9A, andFIG.9Cis an enlarged schematic diagram of a part E inFIG.9B. In combination withFIG.9BandFIG.9C, the plurality of first metal lines52located in the boundary region respectively include a plurality of openings4300. Each of the plurality of openings4300separates the first metal line52into two metal segments. One of the two metal segments belongs to the channel282of the first touch sub-electrode411(taking the second channel282as an example), and the other of the two metal segments belongs to the dummy electrode430, thus, the dummy electrode430is insulated from the channel282of the first touch sub-electrode411.FIG.9Cillustrates the enlargement of the second channel282as an example, the same is suitable for the first channel281. In the boundary region between each part of the dummy electrode430and the main body part280of the first touch sub-electrode411, each part of the dummy electrode430is separated from the main body part280through a similar plurality of openings, so as to insulate them.

For example, each space4300is located at the midpoint of the first metal line segment (i.e., one side of the first grid disconnected by the space4300), so that the position of the space is more regular to reduce the patterning difficulty, which is very important to improve the product qualification rate and save the mask cost.

For example, as shown inFIG.9C, each first channel281and each second channel282include at least two conductor lines composed of a plurality of first metal lines51connected with each other. For example, the two conductor lines are a first conducting line283aand a second conducting line283b, respectively. Both the first conducting line283aand the second conducting line283bpass through the dummy electrode430and are respectively connected with the main body part280of the first touch sub-electrode411at two ends thereof in the respective extension direction, so as to ensure that each first channel281and each second channel282can provide at least two electrical signal transmission channels, to solve the problem that the signal transmission in the first channel281or the second channel282is affected when a single signal transmission channel is disconnected, and ensure the reliability of signal transmission.

For example, as shown inFIG.9BandFIG.9C, each first channel281and each second channel282include at least one first metal grid52arranged in their width direction, the width direction of the first channel281is perpendicular to the extension direction of the first channel281, and the width direction of the second channel282is perpendicular to the extension direction of the second channel282.

For example, each channel281/282includes a plurality of series connected metal grids arranged along the respective extension direction of the each channel281/282; alternatively, each channel281/282includes a plurality of metal grids arranged along the respective extension direction of the each channel281/282and a metal connection line connecting at least two adjacent metal grids.

FIG.9Dis an enlarged schematic diagram of a part including a dummy electrode inFIG.9A. As shown inFIG.9D, for example, at least one strip-shaped channel282includes a first segment2821and a second segment2822arranged along the extension direction of the at least one strip-shaped channel282. The first segment2821and the second segment2822are substantially parallel to each other, that is, the first segment2821and the second segment2822are not on the same straight line, and the first segment2821and the second segment2822are electrically connected through the above-mentioned first metal connection line51.

The embodiments of the disclosure further provide a touch panel, which includes any of the above touch structures.

FIG.10is a schematic diagram of a touch panel provided by at least one embodiment of the present disclosure. As shown inFIG.10, the touch panel80includes a touch region301and a non-touch region302outside the touch region301, and the touch structure40is located in the touch region301. For example, the first touch electrode410extends along the width direction of the rectangle, and the second touch electrode420extends along the length direction of the rectangle. For clarity, the structures of the first touch electrode and the second touch electrode are not shown in detail in the figure. In other embodiments, the first touch electrode410may extend along the length direction of the rectangle, and the second touch electrode420may extend along the width direction of the rectangle.

For example, as shown inFIG.10, the touch panel80further includes a plurality of signal lines450located in the non-touch region302. Each first touch electrode410and each second touch electrode420are electrically connected to a signal line450, respectively, and connected to a touch controller or a touch integrated circuit (not shown in the figure) through the signal line. For example, the first touch electrode410is a touch driving electrode and the second touch electrode420is a touch sensing electrode. However, the embodiments of the present disclosure are not limited in this aspect.

The touch integrated circuit is, for example, a touch chip, which is used to provide a touch driving signal to the second touch electrode420in the touch panel80, receive a touch sensing signal from the first touch electrode410and process the touch sensing signal, for example, provide the processed data/signal to the system controller to realize the touch sensing function.

For example, as shown inFIG.10, ends of the plurality of signal lines450connected with the touch integrated circuit may be arranged on the same side of the touch region301(for example, the lower side inFIG.10), which can facilitate the connection with the touch integrated circuit.

For example, as shown inFIG.10, because the second touch electrode420is longer than the first touch electrode410and has a larger load, in order to improve the signal transmission speed, one signal line450can be provided at each of the two ends of one first touch electrode410. During operation, the touch integrated circuit simultaneously inputs a touch drive signal from two directions to one second touch electrode420through two signal lines450(bilateral drive), so that the speed of signal loading on the second touch electrode420is increased, and the detection speed can be improved.

For example, the material of the first metal grid layer50or the second metal grid layer60includes metal materials such as aluminum, molybdenum, copper and silver, or alloy materials of these metal materials, such as silver palladium copper alloy (APC) materials.

For example, the width (size along the length direction of the metal line) of each space is 5.2 microns.

For example, the material of the insulation layer70may be an inorganic insulation material, for example, the inorganic insulation material may be a transparent material. For example, the inorganic insulation material is an oxide of silicon, a nitride of silicon or a nitrogen oxide of silicon, such as silicon oxide, silicon nitride or silicon oxynitride, or an insulation material such as aluminum oxide and titanium nitride including a metal nitrogen oxide.

For example, the material of the insulation layer70may be an organic insulation material to obtain good bending resistance. For example, the organic insulation material is a transparent material. For example, the organic insulation material is OCA optical adhesive. For example, the organic insulation material may include polyimide (PI), acrylate, epoxy resin, polymethylmethacrylate (PMMA), etc.

FIG.11Ais a schematic planar diagram of a touch display panel30provided by at least one embodiment of the present disclosure; andFIG.11Bis a cross-sectional diagram taken along a section line inFIG.11A.

Referring toFIG.11AandFIG.11B, the touch display panel30includes a base substrate31, a display structure32and the touch structure40that are sequentially stacked on the base substrate31. The touch structure40is located on the side of the display structure32away from the base substrate31and closer to the user during use.

For example, in this embodiment, as an example, the display panel is an OLED display panel. Of course, in other embodiments, the display panel may be a liquid crystal display panel, such as an on-cell or in-cell touch display panel. The embodiments of the present disclosure do not limit the specific type of the display panel adopting the touch structure provided by the embodiments of the present disclosure.

For example, the display structure32includes a plurality of sub-pixels arranged in an array, for example, the pixel array is arranged along the first direction D1and the second direction D2. For example, the touch display panel is an OLED display panel, and the plurality of sub-pixels include a green sub-pixel (G), a red sub-pixel (R), and a blue sub-pixel (B). Each sub-pixel includes a light-emitting element23and a pixel driving circuit that drives the light-emitting element23to emit light. The embodiments of the present disclosure do not limit the type and specific composition of the pixel driving circuit. For example, the pixel driving circuit may be a current driving type or a voltage driving type, may be a2T1C (i.e., two transistors and a capacitor, the two transistors include a driving transistor and a data writing transistor) driving circuit, and may further include a compensation circuit (compensation transistor), a light-emitting control circuit (light-emitting control transistor), a reset circuit (reset transistor), and the like on the basis of the2T1C driving circuit.

For clarity,FIG.11Bshows only the first transistor24in the pixel driving circuit that is directly electrically connected to the light-emitting element23. The first transistor24may be a driving transistor configured to operate in a saturated state and control the magnitude of the current that drives the light-emitting element23to emit light. For another example, the first transistor24may be a light-emitting control transistor for controlling whether a current driving the light-emitting element23to emit light flows. The embodiments of the present disclosure do not limit the specific type of the first transistor.

For example, the light-emitting element23is an organic light-emitting diode, which includes a first electrode231, a light-emitting layer233, and a second electrode232. One of the first electrode231and the second electrode232is an anode and the other is a cathode. For example, the first electrode231is an anode and the second electrode232is a cathode. For example, the light-emitting layer233is an organic light-emitting layer or a quantum dot light-emitting layer. For example, the light-emitting element23may include, in addition to the light-emitting layer233, an auxiliary function layer such as a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer. For example, the light-emitting element23is a top emitting structure, the first electrode231is reflective and the second electrode232is transmissive or semi-transmissive. For example, the first electrode231adopts a high work function material to act as an anode, for example, an ITO/Ag/ITO stacked structure; the second electrode232adopts a low work function material to act as a cathode, such as a semi-transmissive metal or metal alloy material, such as an Ag/Mg alloy material.

The first transistor24includes a gate electrode341, a gate insulation layer342, an active layer343, a first electrode344and a second electrode345, the second electrode345is electrically connected to the first electrode231of the light-emitting element23. The embodiments of the present disclosure do not limit the type, material and structure of the first transistor24, for example, it may be a top gate type, a bottom gate type, etc., the active layer343of the first transistor24may be amorphous silicon, polycrystalline silicon (low-temperature polycrystalline silicon and high-temperature polycrystalline silicon), oxide semiconductor (for example, indium gallium tin oxide (IGZO)), etc., and the first transistor24may be in N-type or P-type.

The transistors adopted in the embodiments of the present disclosure may be thin film transistors, field effect transistors or other switching devices with the same characteristics. The embodiments of the present disclosure are illustrated by taking the thin film transistor as an example. The source electrode and drain electrode of the transistor used here may be symmetrical in structure, so there is no difference in structure between the source electrode and the drain electrode. In the embodiments of the present disclosure, in order to distinguish the two electrodes of the transistor other than the gate electrode, it is directly described that one electrode is the first electrode and the other is the second electrode.

As shown inFIG.11AandFIG.11B, the display structure32further includes a pixel definition layer320, the pixel definition layer320is arranged on the first electrode231of the light-emitting element23, in which a plurality of openings321are formed and the first electrodes231of the plurality of sub-pixels are exposed respectively, thereby defining the pixel opening region of each sub-pixel, and the light-emitting layer of the sub-pixel is formed in the pixel opening region, the second electrode232is formed as a common electrode (that is, shared by a plurality of sub-pixels).FIG.11Aillustrates a pixel opening region310of a green sub-pixel, a pixel opening region320of a red sub-pixel, and a pixel opening region330of a blue sub-pixel.

FIG.11Bdoes not show the patterns in the second touch electrode layer402. For example, the second touch electrode layer402is located on the side of the first touch electrode layer401close to the base substrate31.

The orthographic projections of the plurality of first metal lines51in the first touch electrode layer401and the plurality of second metal lines61in the second touch electrode layer402on the base substrate31are located outside the orthographic projections of the pixel opening regions of the plurality of sub-pixels on the base substrate31, that is, located inside the orthographic projections of the pixel separation regions between the pixel opening regions on the base substrate31, the pixel separation regions are the non-opening regions322of the pixel definition layer320. The pixel separation region is used to separate the pixel opening regions of the plurality of sub-pixels and separate the light-emitting layer of each sub-pixel to prevent color mixing.

For example, the grids of the first metal grid52or the second metal grid62covers at least one pixel opening region. For example, the grid openings of the first metal grid52or the second metal grid62covers the pixel opening regions310of the two green sub-pixels, which are arranged in pairs and arranged side by side in the second direction D2.

As shown inFIG.11B, the display structure32further includes an encapsulation layer33between the light-emitting element23and the touch structure20. The encapsulation layer33is configured to seal the light-emitting element23to prevent external moisture and oxygen from penetrating the light-emitting element and the driving circuit, resulting in damage to devices such as the light-emitting element23. For example, the encapsulation layer33may be a single-layer structure or a multi-layer structure, for example, the encapsulation layer33includes an organic film, an inorganic film, or a multi-layer structure including an organic film and an inorganic film alternately stacked.

For example, as shown inFIG.11B, the touch display panel30further includes a buffer layer22between the display structure32and the touch structure20. For example, the buffer layer22is formed on the encapsulation layer33to improve the adhesion between the touch structure40and the display structure32. For example, the buffer layer22is an inorganic insulation layer. For example, the material of the buffer layer22may be silicon nitride, silicon oxide or nitrogen oxide of silicon. For example, the buffer layer22may include a structure in which a silicon oxide layer and a silicon nitride layer are alternately stacked.

For example, lengths of different edges of the first metal grid52of the first touch electrode layer401are different, and similarly, lengths of edges of different second metal grids62of the second touch electrode layer402are different. For example, the sum of the lengths of the second metal lines of the second metal grid62overlapping with the first metal lines51is the smallest. For example, the edges of the marked edges a, b, c, d, e, and f inFIG.11Arepresent the first metal lines51overlapped with the second metal line. When the number of the first metal lines51overlapped with the second metal line is equal, the sum of the lengths of these first metal lines51overlapped with the second metal line in the embodiments of the present disclosure is the smallest.

At least one embodiment of the present disclosure further provides an electronic device, the electronic device includes the touch display panel30. For example, the electronic device is a display device, such as an OLED display device or a liquid crystal display device.

For example, the electronic device can be any product or component with a display function and a touch control function, such as a display, an OLED panel, an OLED TV, an electronic paper, a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a navigator, etc.

What have been described above are only specific implementations of the present disclosure, the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be based on the protection scope of the claims.