CN112925448B

CN112925448B - Touch display panel, detection method thereof and touch display device

Info

Publication number: CN112925448B
Application number: CN202110304029.9A
Authority: CN
Inventors: 吴常志; 肖阳珍; 孙莹; 许育民
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2023-12-29
Anticipated expiration: 2041-03-22
Also published as: CN112925448A

Abstract

The invention discloses a touch display panel, a detection method thereof and a touch display device, wherein the touch display panel comprises a plurality of touch electrodes and a touch multipath selection circuit which are arranged in a matrix; the touch control electrode comprises a plurality of touch control electrode columns, the touch control electrode columns comprise a plurality of touch control electrode groups, the touch control multi-path selection circuit comprises a plurality of multi-path selection units, and the touch control electrode groups correspond to the multi-path selection units one by one; the touch electrode group comprises N touch electrodes, the multi-path selection unit comprises N switching elements, first ends of the N switching elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection unit, second ends of the switching elements serve as touch signal output ends of the multi-path selection unit and are electrically connected with the touch electrodes, and N is more than or equal to 2 and is an integer; any two touch electrodes in the same touch electrode group are arranged at intervals along the first direction. The technical scheme provided by the invention can realize detection of metal residues between the touch electrodes.

Description

Touch display panel, detection method thereof and touch display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a touch display panel, a detection method thereof, and a touch display device.

Background

Because touch operation is a simple and convenient man-machine interaction mode, more and more products integrate touch functions into a display device, and touch display devices are applied. The touch display device generally includes a plurality of touch electrodes, and there may be metal residues between the touch electrodes during the manufacturing process, thereby causing problems of poor touch and poor touch detection performance.

Disclosure of Invention

The embodiment of the invention provides a touch display panel, a detection method thereof and a touch display device, which can realize detection of metal residues between touch electrodes, thereby solving the problems of poor touch control and poor touch control detection performance.

In a first aspect, an embodiment of the present invention provides a touch display panel, including a display area and a non-display area;

the display area comprises a plurality of touch electrodes which are arranged in a matrix;

the non-display area comprises a touch control multi-path selection circuit;

the touch electrodes comprise a plurality of touch electrode rows, the touch electrode rows extend along a first direction, the touch electrode rows are arranged along a second direction, and the first direction and the second direction intersect and are parallel to the light emitting surface of the touch display panel;

The touch electrode array comprises a plurality of touch electrode groups, the touch multipath selection circuit comprises a plurality of multipath selection units, and the touch electrode groups are in one-to-one correspondence with the multipath selection units; the touch electrode group comprises N touch electrodes, the multi-path selection unit comprises N switching elements, first ends of the N switching elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection unit, second ends of the switching elements serve as touch signal output ends of the multi-path selection unit and are electrically connected with the touch electrodes, and N is more than or equal to 2 and is an integer;

and any two touch electrodes in the same touch electrode group are arranged at intervals along the first direction.

In a second aspect, an embodiment of the present invention provides a method for detecting a touch display panel, which is applied to the touch display panel in the first aspect, where the touch display panel includes a driving chip;

the touch electrodes comprise a plurality of touch electrode rows, the touch electrode rows extend along the second direction, and the touch electrode rows are arranged along the first direction;

the detection stage of the touch display panel comprises a short circuit detection stage, wherein the short circuit detection stage comprises a first sub-detection stage and a second detection stage;

The detection method comprises the following steps:

in the first detection stage, short circuit detection signals are transmitted to the touch electrode columns of the odd columns or the even columns, and whether short circuit exists between two adjacent columns of touch electrode columns is judged according to the detection signals on the touch electrodes of the even columns or the odd columns;

and in the second detection stage, short circuit detection signals are transmitted to the touch electrode rows of the odd-numbered rows or the even-numbered rows, and whether the touch electrode rows of the two adjacent rows are short-circuited is judged according to the detection signals on the touch electrodes of the even-numbered rows or the odd-numbered rows.

In a third aspect, an embodiment of the present invention further provides a touch display device, including the touch display panel according to the first aspect

The touch display panel provided by the embodiment of the invention has the advantages that the display area comprises a plurality of touch electrodes which are arranged in a matrix manner, the plurality of touch electrodes comprise a plurality of touch electrode columns, each touch electrode column comprises a plurality of touch electrode groups, the non-display area comprises a touch multi-path selection circuit, the touch multi-path selection circuit comprises a plurality of multi-path selection units, the touch electrode groups are in one-to-one correspondence with the multi-path selection units, each touch electrode group comprises N touch electrodes, each multi-path selection unit comprises N switching elements, the first ends of the N switching elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection units, the second ends of the N switching elements are electrically connected with the N touch electrodes in one-to-one correspondence to serve as touch signal output ends of the multi-path selection units, time-sharing driving of the touch display panel can be realized, and the number of signal pins is reduced; in addition, along the first direction of extending of the touch electrode array, by setting any two touch electrodes in the same touch electrode group at intervals, the detection of metal residues between the touch electrodes can be realized, so that the problems of poor touch control and poor touch control detection performance are solved.

Drawings

Fig. 1 is a schematic structural diagram of a touch display panel in the prior art;

FIG. 2 is a timing diagram of a touch display panel according to the prior art;

fig. 3 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a short circuit detection of the touch display panel of FIG. 3 in a first detection stage;

FIG. 6 is a schematic diagram illustrating another short circuit detection of the touch display panel of FIG. 3 in a first detection stage;

FIG. 7 is a schematic diagram illustrating a short circuit detection of the touch display panel of FIG. 3 in a second detection stage;

FIG. 8 is a timing diagram of the touch display panel of FIGS. 3 and 4;

fig. 9 is a schematic structural diagram of another touch display panel according to an embodiment of the invention;

fig. 10 is a schematic structural diagram of another touch display panel according to an embodiment of the invention;

fig. 11 is a schematic view of a partial film structure of a touch display panel according to an embodiment of the present invention;

fig. 12 is a flowchart of a method for detecting a touch display panel according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a touch display device according to an embodiment of the invention.

Detailed Description

The following is a detailed description of the embodiments of the present invention, in order to make the objects, technical solutions and advantages of the present invention more apparent. It is apparent that the described embodiments are some, but not all, embodiments of the present invention, and that all other embodiments, which a person of ordinary skill in the art would obtain without making inventive efforts, are within the scope of this invention.

Fig. 1 is a schematic structural diagram of a touch display panel in the prior art, and fig. 2 is a timing diagram of a touch display panel in the prior art. Referring to fig. 1, a conventional touch display panel 1' includes a driving chip 300', a plurality of touch electrodes 10' arranged in a matrix, and a plurality of switching elements 20' electrically connected to the plurality of touch electrodes 10' in a one-to-one correspondence, wherein the plurality of switching elements 20' are electrically connected to the driving chip 300 '. In the preparation process of the touch display panel, metal residues between touch electrodes are unavoidable, and the metal residues between the touch electrodes generally cause poor touch control, so that the touch detection performance of the touch display panel is poor, and the user experience is affected. For example, as shown in fig. 1, a metal residue P1 exists between the touch electrode i and the touch electrode i+1, a metal residue P2 exists between the touch electrode i+4, and a metal residue P3 exists between the touch electrode i+5. Therefore, after the touch display panel is manufactured, it needs to be detected, that is, whether metal residues exist between the touch electrodes or not is detected. For example, referring to fig. 1 and 2, in the stage T1', the clock control signal TPSWA ' outputs a high level, the clock control signal TPSWB ' outputs a low level, the switching element 20' receiving the clock control signal TPSWA ' is turned on, the driving chip 300' sends a detection signal to a portion of the touch electrodes 10' in the odd-numbered rows through the switching element 20', and judges whether there is a metal residue between the touch electrodes 10' in the odd-numbered rows according to the current signals fed back by the touch electrodes 10' in other portions of the odd-numbered rows, for example, sends the detection signal to the touch electrodes 10' in even-numbered columns in the odd-numbered rows, and judges whether there is a metal residue between the touch electrodes 10' in the odd-numbered rows according to the current signals fed back by the touch electrodes 10' in the odd-numbered columns in the odd-numbered rows; in the stage T2', the clock control signal TPSWA ' outputs a low level, the switching element 20' receiving the clock control signal TPSWB ' is turned on when the clock control signal TPSWB ' outputs a high level, the driving chip 300' sends a detection signal to a part of the touch electrodes 10' in the even row through the switching element 20', and determines whether metal residues exist between the touch electrodes 10' in the even row according to current signals fed back by the touch electrodes 10' in other parts of the even row, for example, sends the detection signal to the touch electrodes 10' in even columns in the even row, and determines whether metal residues exist between the touch electrodes 10' in the even row according to current signals fed back by the touch electrodes 10' in odd columns in the even row. In the prior art, the metal residue P2 existing between the touch electrode i and the touch electrode i+4 can be detected, but the metal residue P1 existing between the touch electrode i and the touch electrode i+1 and the metal residue P3 existing between the touch electrode i and the touch electrode i+5 cannot be detected, that is, in the prior art, whether the metal residue exists between the touch electrodes 10 'in the same row or not can be detected, but whether the metal residue exists between the touch electrodes 10' in different rows or not can not be detected.

In view of the above technical problems, the touch display panel provided by the embodiment of the invention includes a display area and a non-display area; the display area comprises a plurality of touch electrodes which are arranged in a matrix; the non-display area comprises a touch control multi-path selection circuit; the touch electrodes comprise a plurality of touch electrode rows, the touch electrode rows extend along a first direction, the touch electrode rows are arranged along a second direction, and the first direction and the second direction intersect and are parallel to the light emitting surface of the touch display panel; the touch electrode array comprises a plurality of touch electrode groups, the touch multipath selection circuit comprises a plurality of multipath selection units, and the touch electrode groups are in one-to-one correspondence with the multipath selection units; the touch electrode group comprises N touch electrodes, the multi-path selection unit comprises N switching elements, first ends of the N switching elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection unit, second ends of the switching elements serve as touch signal output ends of the multi-path selection unit and are electrically connected with the touch electrodes, and N is more than or equal to 2 and is an integer; and any two touch electrodes in the same touch electrode group are arranged at intervals along the first direction.

In the embodiment of the invention, the display area comprises a plurality of touch electrodes which are arranged in a matrix, the plurality of touch electrodes comprise a plurality of touch electrode columns, each touch electrode column comprises a plurality of touch electrode groups, the non-display area comprises a touch multi-path selection circuit, the touch multi-path selection circuit comprises a plurality of multi-path selection units, the touch electrode groups are in one-to-one correspondence with the multi-path selection units, each touch electrode group comprises N touch electrodes, each multi-path selection unit comprises N switching elements, the first ends of the N switching elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection units, the second ends of the N switching elements are electrically connected with the N touch electrodes in one-to-one correspondence to serve as touch signal output ends of the multi-path selection units, so that time-sharing driving of the touch display panel can be realized, and the number of signal pins is reduced; in addition, along the first direction of extending of the touch electrode array, by setting any two touch electrodes in the same touch electrode group at intervals, the detection of metal residues between the touch electrodes can be realized, so that the problems of poor touch control and poor touch control detection performance are solved.

The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.

Fig. 3 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention, and fig. 4 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention. Referring to fig. 3 and 4, the touch display panel 1 includes a display area aa and a non-display area bb; the display area aa comprises a plurality of touch electrodes 10 which are arranged in a matrix; the non-display area bb includes a touch-control multiplexing circuit 200; the plurality of touch electrodes 10 include a plurality of touch electrode rows 100, the touch electrode rows 100 extend along a first direction X, the plurality of touch electrode rows 100 are arranged along a second direction Y, and the first direction X and the second direction Y intersect and are parallel to the light emitting surface of the touch display panel 1; the touch electrode array 100 includes a plurality of touch electrode groups 110, the touch multiplexing circuit 200 includes a plurality of multiplexing units 210, and the touch electrode groups 110 are in one-to-one correspondence with the multiplexing units 210; the touch electrode group 110 comprises N touch electrodes 10, the multi-path selection unit 210 comprises N switching elements 20, first ends of the N switching elements 20 are mutually and electrically connected to serve as touch signal input ends of the multi-path selection unit 210, second ends of the switching elements 20 serve as touch signal output ends of the multi-path selection unit 210 and are electrically connected to the touch electrodes 10, and N is more than or equal to 2 and is an integer; any two touch electrodes 10 in the same touch electrode group 110 are arranged at intervals along the first direction X.

In the embodiment of the present invention, the touch electrode 10 in the touch display panel 1 may be a self-capacitance touch electrode, and the working process is as follows: each touch electrode 10 corresponds to a certain coordinate position, the touch electrodes 10 respectively form a capacitance with the ground, when a finger touches the touch display panel 1, the capacitance of the finger is superimposed on the touch electrode 10 touched by the finger, so that the capacitance to the ground of the touch electrode 10 touched by the finger changes, and the change of signals of the touch electrodes 10 reflects the change of the capacitance to the ground of the touch electrode, so that the specific touch electrode can be determined by detecting the touch detection signals fed back by the touch electrodes 10, and then the touch position of the finger can be determined according to the coordinate value corresponding to the touch electrode with the changed signal.

The switching unit 20 may include, for example, a transistor or a MOS transistor, which may implement an off and on function.

Wherein, along the first direction X, any two touch electrodes 10 in the same touch electrode set 110 are disposed at intervals. In the prior art, as shown in fig. 1, the touch electrodes 10' in the same touch electrode set 110' are adjacently disposed, so that when the clock control signal TPSWA ' is at a high level and the clock control signal TPSWB ' is at a low level, it can be detected whether there is a metal residue between the adjacent touch electrodes 10' in the odd rows; when the clock control signal TPSWA ' is at a low level and the clock control signal TPSWB ' is at a high level, it can be detected whether there is a metal residue between the adjacent touch electrodes 10' in the even rows; however, the metal residue between the touch electrodes 10 'of the odd-numbered rows and the touch electrodes 10' of the even-numbered rows cannot be detected. However, in the embodiment of the present invention, compared with fig. 1 and 3, by adjusting the connection relationship between the second end of the switching element 20 'and the touch electrode 10' in the prior art, or compared with fig. 1 and 4, by adjusting the connection relationship between the first end of the switching element 20 'and the driving chip 300' in the prior art, the two touch electrodes 10 in the same touch electrode set 110 can be arranged at intervals along the first direction X, so as to further realize the detection of metal residues between the touch electrodes, and improve the problems of poor touch detection performance and poor touch detection performance.

As shown in fig. 3 and 4, the touch electrodes 10 in the first touch electrode set 111 and the touch electrodes 10 in the second touch electrode set 112 are disposed in a crossing manner, so that when the first clock control signal TPSWA is at a high level and the second clock control signal TPSWB is at a low level, it can be detected whether there is a metal residue between the adjacent touch electrodes 10 in the 1+4k row and the 2+4k row, where k is greater than or equal to 0 and k is an integer; when the first clock control signal TPSWA is at a low level and the second clock control signal TPSWB is at a high level, whether metal residues exist between adjacent touch electrodes 10 in the 3+4k row and the 4+4k row or not can be detected, k is more than or equal to 0, and k is an integer; when the first clock control signal TPSWA and the second clock control signal TPSWB are both at high level, it can be detected whether there is a metal residue between adjacent touch electrodes 10 between 2k+1 and 2k+2 rows, where k is an integer greater than or equal to 0, that is, it can be detected that there is a metal residue between touch electrodes 10 between different rows of the entire touch display panel 1; in addition, it can be understood that, by adopting the technical scheme of the embodiment of the invention, the metal residues between the touch electrodes 10 in different rows along the diagonal direction of the first direction X and the second direction Y can also be detected.

It should be noted that, in the embodiment of the present invention, the number of the touch electrodes 10 is not limited, and the number of the touch electrode rows 100, the number of the touch electrode groups 110 in the touch electrode rows 100, and the number of the touch electrodes 10 in the touch electrode groups 110 are not limited, and fig. 3 and fig. 4 only illustrate that the touch display panel 1 includes 6 touch electrode rows 100, each touch electrode row 100 includes two touch electrode groups 110, namely, the first touch electrode group 111 and the second touch electrode group 112, and each touch electrode group 110 includes two touch electrodes 10, namely, the first touch electrode 11 and the second touch electrode 12. With continued reference to fig. 3 and 4, accordingly, the touch-sensitive multiplexing circuit 200 may include 12 multiplexing units 210, each multiplexing unit 210 including two switching elements 20, namely, a first switching element 21 and a second switching element 22. Further, the first ends of the two switching elements 20 in each multiplexing unit 210 are electrically connected to each other and to the driving chip 300, and the first ends of the two switching elements 20 are used as the touch signal input ends of the multiplexing units 210 for receiving the touch signal of the driving chip 300; the second ends of the two switching elements 20 of each multiplexing unit 210 are electrically connected with the two touch electrodes 10 of the corresponding touch electrode group 110 in a one-to-one correspondence manner, and serve as touch signal output ends of the multiplexing units 210, and are used for transmitting touch signals of the driving chip 300 to the corresponding touch electrodes 10 in respective conducting states; the control terminals of the two switching elements 20 of each multiplexing unit 210 respectively receive the first clock control signal TPSWA and the second clock control signal TPSWB, and control the on or off of the respective switching elements according to the corresponding clock control signals.

According to the technical scheme provided by the embodiment of the invention, the time-sharing driving of the touch display panel is realized, the number of signal pins is reduced, and meanwhile, the detection of metal residues between the touch electrodes can be realized, so that the problems of poor touch control and poor touch control detection performance are solved.

Optionally, with continued reference to fig. 3 and 4, the touch display panel 1 may further include a driving chip 300; the plurality of touch electrodes 10 may include a plurality of touch electrode rows L0, the touch electrode rows L0 extending along the second direction Y, the plurality of touch electrode rows L0 being arranged along the first direction X; the detection stage of the touch display panel 1 may include a short circuit detection stage, and the short circuit detection stage may include a first detection stage T1 and a second detection stage T2; in the first detection stage T1, the driving chip 300 is configured to transmit a short circuit detection signal to the odd-numbered or even-numbered touch electrode columns 100, and determine whether a short circuit exists between two adjacent touch electrode columns 100 according to the detection signal on the even-numbered or odd-numbered touch electrode 10; in the second detection stage T2, the driving chip 300 is configured to transmit a short circuit detection signal to the touch electrode row L0 of the odd-numbered row or the even-numbered row, and determine whether a short circuit exists between two adjacent touch electrode rows L0 according to the detection signal on the touch electrode 10 of the even-numbered row or the odd-numbered row.

In the first detection stage T1, the driving chip 300 is configured to transmit a short circuit detection signal to the touch electrode rows 100 in the odd or even columns, and determine whether the touch electrode rows 100 in two adjacent columns are shorted according to the detection signal on the touch electrode 10 in the even or odd columns. Fig. 5 is a schematic diagram illustrating a short circuit detection of the touch display panel in the first detection stage in fig. 3. As shown in fig. 5, in the first detection stage T1, when the first clock control signal TPSWA is at a high level and the second clock control signal TPSWB is at a low level, the switching element 20 electrically connected to the touch electrode 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0 is turned on, the driving chip 300 sends a short circuit detection signal to the touch electrode 10 in the odd column in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, and judges whether a short circuit current exists between the touch electrodes 10 in the adjacent columns according to the detection signal on the touch electrode 10 in the even column in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, that is, whether metal residues exist; in addition, the driving chip 300 may also send a short circuit detection signal to the touch electrodes 10 in the even columns in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, and determine whether a short circuit current exists between the touch electrodes 10 in the adjacent columns according to the detection signals on the touch electrodes 10 in the odd columns in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, that is, whether metal residues exist; wherein k is more than or equal to 0, and k is an integer. Fig. 6 is another schematic diagram of short circuit detection of the touch display panel provided in fig. 3 in the first detection stage. As shown in fig. 6, in the first detection stage T1, when the first clock control signal TPSWA is at a low level and the second clock control signal TPSWB is at a high level, the switching element 20 electrically connected to the adjacent touch electrode 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0 is turned on, the driving chip 300 sends a short circuit detection signal to the touch electrode 10 in the odd column in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, and judges whether a short circuit current exists between the touch electrodes 10 in the adjacent columns according to the detection signal on the touch electrode 10 in the even column in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, that is, whether a metal residue exists; in addition, the driving chip 300 may also send a short circuit detection signal to the touch electrodes 10 in the even columns in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, and determine whether a short circuit current exists between the touch electrodes 10 in the adjacent columns according to the detection signals on the touch electrodes 10 in the odd columns in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, that is, whether metal residues exist; wherein k is more than or equal to 0, and k is an integer.

In the second detection stage T2, the driving chip 300 is configured to transmit a short circuit detection signal to the touch electrode row L0 of the odd-numbered row or the even-numbered row, and determine whether the touch electrode row L0 of two adjacent rows is short-circuited according to the detection signal on the touch electrode 10 of the even-numbered row or the odd-numbered row. Fig. 7 is a schematic diagram illustrating a short circuit detection of the touch display panel in the second detection stage in fig. 3. As shown in fig. 7, in the second detection stage T2, the first clock control signal TPSWA and the second clock control signal TPSWB are both at high level, all the switching elements 20 are turned on, the driving chip 300 may send a short circuit detection signal to the touch electrodes 10 of the odd-numbered rows (2k+1 rows), and determine whether the short circuit current exists in the touch electrodes 10 between the adjacent rows according to the detection signal on the touch electrodes 10 of the even-numbered rows (2k+2 rows), that is, whether the metal residue exists; in addition, the driving chip 300 may also send a short circuit detection signal to the touch electrodes 10 in even rows (2k+2 rows), and determine whether a short circuit current exists in the touch electrodes 10 between adjacent rows, i.e. whether metal residues exist, according to the detection signal on the touch electrode 10 in odd rows (2k+1 rows); wherein k is more than or equal to 0, and k is an integer.

Optionally, with continued reference to fig. 3 and 4, the touch display panel 1 may further include a plurality of touch signal source lines 310 and N clock control signal lines 40; the touch signal source lines 310 are in one-to-one correspondence with the multiple selection units 210 and are respectively electrically connected with the touch signal input ends and the driving chip 300; the nth clock control signal line 40 is electrically connected to the control terminal of the nth switching element 20 in the multiplexing unit 210; n is more than or equal to 1 and less than or equal to N, and N is an integer; the first detection phase T1 may comprise N sub-phases; in the nth sub-stage, the nth clock control signal line 310 is used to transmit an enable signal to the control terminal of the nth switching element 20 in the multiplexing unit 210; the driving chip 300 is configured to transmit a short circuit detection signal to an odd or even number of touch electrodes 10 in a plurality of touch electrode rows L0 connected to the second end of the nth switching element 20, and determine whether a short circuit exists between two adjacent touch electrodes 10 in the plurality of touch electrode rows L0 according to the detection signal on the even or odd number of touch electrodes 10 in the plurality of touch electrode rows L0; in the second detection phase T2, each of the N clock control signal lines is used to transmit an enable signal to the switching element 20 connected thereto in the multiplexing unit 210; the driving chip 300 is configured to transmit a short circuit detection signal to the touch electrode row L0 of the odd-numbered row or the even-numbered row, and determine whether a short circuit exists between two adjacent touch electrode rows L0 according to the detection signal on the touch electrode 10 of the even-numbered row or the odd-numbered row.

Specifically, a first end of the touch signal source line 310 is electrically connected to the driving chip 300, and a second end of the touch signal source line 310 is electrically connected to first ends of the N switching elements 20 in the multiple-path selection unit 210; the touch signal source line 310 is used for transmitting a short circuit detection signal of the driving chip 300 to the corresponding switching element 20. The control terminals of the N switching elements 20 in each multiplexing unit 210 are electrically connected to the N clock control signal lines 40 in a one-to-one correspondence, and each clock control signal line 40 is configured to transmit a corresponding clock control signal, i.e., an enable signal, to the corresponding switching element 20 to control on or off of the corresponding switching element 20.

The first detection stage T1 may include N sub-stages, that is, the number of N touch electrodes 10 in each touch electrode group 110, the number of N switching elements 20 in each multiplexing unit 210, the number of N clock control signal lines 40, and the number of N sub-stages are in one-to-one correspondence, that is, in the N sub-stage, the N clock control signal lines 40 transmit an enable signal to the control end of the N switching element 20 in each multiplexing unit 210 to turn on the corresponding switching element 20, the driving chip 300 transmits a short circuit detection signal to the first end of the N switching element 20 in each multiplexing unit 210 through the touch signal source line 310, and the second end of the N switching element 20 is transmitted to the N touch electrode 10 in each touch electrode group 110, so as to determine whether a short circuit current exists between adjacent touch electrodes 10 according to the detection signal on the touch electrode 10, that is, whether a metal residue exists is determined. Fig. 8 is a timing diagram of the touch display panel provided in fig. 3 and 4. As shown in fig. 8, the first detection stage T1 may include two sub-stages, a first sub-stage T1 and a second sub-stage T2. The first sub-stage t1 indicates that the first clock control signal line 41 transmits the enable signal TPSWA to the control terminal of the first switching element 21 in each multiplexing unit 210 to turn on the corresponding switching element 21; the driving chip 300 transmits a short circuit detection signal to the first end of the first switching element 21 of the multiple selection units 210 through the touch signal source line 310, and transmits the short circuit detection signal to the first touch electrode 11 in each touch electrode group 110 through the second end of the first switching element 21, specifically, the short circuit detection signal can be transmitted to the odd number of touch electrodes 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, and then whether a short circuit exists between two adjacent touch electrodes 10 or not can be judged according to detection signals on the even number of touch electrodes 10 in the same touch electrode row L0; it can be further understood that the signals can be transmitted to even number of touch electrodes 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, so that whether a short circuit exists between two adjacent touch electrodes 10 or whether metal residues exist can be judged according to detection signals on the odd number of touch electrodes 10 in the same touch electrode row L0; wherein k is more than or equal to 0, and k is an integer. The second sub-stage t2 indicates that the second clock control signal line 42 transmits the enable signal TPSWB to the control terminal of the second switching element 22 in each multiplexing unit 210 to turn on the corresponding switching element 22; the driving chip 300 transmits a short circuit detection signal to the first end of the second switching element 22 of the multiple selection unit 210 through the touch signal source line 310, and transmits the short circuit detection signal to the second touch electrode 12 in each touch electrode group 110 through the second end of the second switching element 22, specifically, the short circuit detection signal can be transmitted to the odd number of touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, and then whether a short circuit exists between two adjacent touch electrodes 10 or not can be judged according to the detection signals on the even number of touch electrodes 10 in the same touch electrode row L0; it can be understood that the signals can be transmitted to even number of touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, so as to determine whether a short circuit exists between two adjacent touch electrodes 10 or whether metal residues exist according to detection signals on the odd number of touch electrodes 10 in the same touch electrode row L0; wherein k is more than or equal to 0, and k is an integer. In the second detection phase T2, all clock control signal lines 40 transmit the enable signals TPSWA and TPSWB to the control terminal of the first switching element 21 and the control terminal of the second switching element 22 in each multiplexing unit 210 to turn on all the switching elements 20; the driving chip 300 transmits the short circuit detection signal to the first ends of all the switching elements 20 of the multiple selection units 210 through the touch signal source line 310, and transmits the short circuit detection signal to the touch electrodes 10 in all the touch electrode rows L0 through the second end of each switching element 20, specifically, the short circuit detection signal can be sent to the touch electrode rows L0 of the odd-numbered rows (2k+1st rows), and then whether a short circuit current exists between two adjacent touch electrode rows L0 or not can be judged according to the detection signal of the touch electrode 10 on the touch electrode row L0 of the even-numbered rows (2k+2nd rows), namely, whether metal residues exist or not; the even number row (2k+2 row) of touch electrode rows L0 may also send a short circuit detection signal, so that whether a short circuit current exists between two adjacent touch electrode rows L0, that is, whether metal residues exist, may be determined according to the detection signal of the touch electrode 10 on the odd number row (2k+1 row) of touch electrode rows L0; wherein k is more than or equal to 0, and k is an integer.

Optionally, with continued reference to fig. 3 and 4, the touch electrode array 100 may include M touch electrode groups 110, where the touch electrode groups 110 may include a first touch electrode 11 and a second touch electrode 12, M is greater than or equal to 2 and M is an integer; along a first direction X, a first touch electrode 11 in an ith touch electrode group 110 is disposed adjacent to a first touch electrode 11 in an ith+1 touch electrode group 110, a first touch electrode 11 in an mth touch electrode group 110 is disposed adjacent to a second touch electrode 12 in the first touch electrode group 110, and a second touch electrode 12 in a jth touch electrode group 110 is disposed adjacent to a second touch electrode 12 in the jth+1 touch electrode group 110; wherein i is more than or equal to 1 and less than or equal to M-1, j is more than or equal to 1 and less than or equal to M-1.

As illustrated in fig. 3 and 4, each touch electrode row 100 may include two touch electrode groups 110, that is, a first touch electrode group 111 and a second touch electrode group 112, each touch electrode group 110 may include two touch electrodes 10, that is, a first touch electrode 11 and a second touch electrode 12, and any two touch electrodes 10 in the same touch electrode group 110 are disposed at intervals along a first direction X, specifically, along the first direction X, the first touch electrode 11 in the first touch electrode group 111 is disposed adjacent to the first touch electrode 11 in the second touch electrode group 112, and the first touch electrode 11 in the second touch electrode group 112 is disposed adjacent to the second touch electrode 12 in the first touch electrode group 111, and the second touch electrode 12 in the first touch electrode group 111 is disposed adjacent to the second touch electrode 12 in the second touch electrode group 112. The number of the touch electrode groups 110 in each touch electrode row 100 is not limited in the embodiment of the present invention.

Optionally, with continued reference to fig. 3, the touch display panel 1 may further include a plurality of touch signal lines 50, where the touch signal lines 50 are electrically connected to the touch signal output end and the touch electrode 10, respectively; the touch-control multiplexing circuit 200 may include M multiplexing units 210; the touch signal lines 50 may include M touch signal line groups 510; along the second direction Y, a plurality of multiplexing units 210 are sequentially disposed; the plurality of touch signal line groups 510 are sequentially arranged.

Specifically, the touch line display panel 1 may be electrically connected between the second end of each switching element 20 and the corresponding touch electrode 10 through a touch signal line 50, where the touch signal line 50 is used for transmitting a short circuit detection signal to the corresponding touch electrode 10.

Specifically, to achieve the detection of the metal residue between the touch electrodes, to improve the problems of poor touch performance and poor touch detection performance, any two touch electrodes 10 in the same touch electrode group 110 may be disposed at intervals along the first direction X, and as shown in fig. 3, the connection relationship between the second end of the switching element 20 and the touch electrode 10 may be adjusted, for example, along the second direction Y, to divide the plurality of touch signal lines 50 into a plurality of touch signal line groups 510 sequentially disposed, and correspondingly, a plurality of multiplexing units 210 are also sequentially disposed along the second direction Y. Referring to fig. 3, the touch display panel 1 includes 6 touch electrode rows 100, each touch electrode row 100 includes two touch electrode groups 110, a total of 12 touch electrode groups 110, each touch electrode group 110 includes two touch electrodes 10, a total of 24 touch electrodes 10, corresponding to each touch electrode group, includes 24 touch signal lines 50, and is divided into 12 touch signal line groups 510 along a second direction Y, and in addition, the touch multiplexing circuit 200 is divided into 12 multiplexing units 210 along the second direction Y, so that it is possible to implement adjacent arrangement of a first touch electrode 11 in the first touch electrode group 111 and a first touch electrode 11 in the second touch electrode group 112 along the first direction X, adjacent arrangement of a first touch electrode 11 in the second touch electrode group 112 and a second touch electrode 12 in the first touch electrode group 111, that is, adjacent arrangement of a second touch electrode 12 in the first touch electrode group 111 and a second touch electrode 12 in the second touch electrode group 112 along the second direction Y, that is, the two touch electrodes are adjacent to each other, and the touch performance is improved by any two touch electrodes 110 is arranged along the first direction X.

Optionally, with continued reference to fig. 4, the touch multiplexing circuit 200 may include M multiplexing units 210, the multiplexing units 210 may include a first switching element 21 and a second switching element 22, the first switching element 21 may include a first touch signal output terminal, and the second switching element 22 may include a second touch signal output terminal; the touch display panel 1 may further include a plurality of touch signal lines 50, the touch signal lines 50 may include M touch signal line groups 510, and the touch signal line groups 510 may include a first touch signal line 51 and a second touch signal line 51; the first touch signal line 51 is electrically connected with the first touch signal output end and the first touch electrode 11 respectively, and the second touch signal line 52 is electrically connected with the second touch signal output end and the second touch electrode 12 respectively; in the second direction Y, the first switching element 21 in the mth multiplexing unit 210 is disposed adjacent to the first switching element 21 in the m+1th multiplexing unit 210, the first switching element 21 in the mth multiplexing unit 210 is disposed adjacent to the second switching element 22 in the first multiplexing unit 210, and the second switching element 22 in the q-th multiplexing unit 210 is disposed adjacent to the second switching element 22 in the q+1th multiplexing unit 210; wherein, M is more than or equal to 1 and less than or equal to M-1, q is more than or equal to 1 and less than or equal to M-1; along the second direction Y, the first touch signal line 51 in the w-th touch signal line group 510 is disposed adjacent to the first touch signal line 51 in the w+1th touch signal line group 510, the first touch signal line 51 in the M-th touch signal line group 510 is disposed adjacent to the second touch signal line 52 in the first touch signal line group 510, and the second touch signal line 52 in the z-th touch signal line group 510 is disposed adjacent to the second touch signal line 52 in the z+1th touch signal line group 510; wherein w is more than or equal to 1 and less than or equal to M-1, and z is more than or equal to 1 and less than or equal to M-1.

Specifically, the touch line display panel 1 may be electrically connected between the second end of each switching element 20 and the corresponding touch electrode 10 through a touch signal line 50, where the touch signal line 50 is used for transmitting a short circuit detection signal to the corresponding touch electrode 10. As shown in fig. 4, each touch electrode group 110 includes two touch electrodes 10, i.e., a first touch electrode 11 and a second touch electrode 12, and each multiplexing unit 210 includes two switching elements 20, i.e., a first switching element 21 and a second switching element 22, and each touch signal line group 510 includes two touch signal lines 50, i.e., a first touch signal line 51 and a second touch signal line 52. The second end of the first switching element 21, i.e. the first touch signal output end, is electrically connected to the first touch electrode 11 through the first touch signal line 51; the second terminal of the second switching element 22, i.e. the second touch signal output terminal, is electrically connected to the second touch electrode 12 through the second touch signal line 52.

Specifically, to achieve the detection of metal residues between the touch electrodes and improve the problems of poor touch performance and poor touch detection performance, any two touch electrodes 10 in the same touch electrode group 110 may be arranged at intervals along a first direction X, and as shown in fig. 4, the connection relationship between the first ends of the switching elements 20 and the driving chip 300 may also be adjusted, for example, on the one hand, in the second direction Y, any two switching elements 20 in the same multiplexing unit 210 are arranged at intervals, specifically, a first switching element 21 in a first multiplexing unit 210 is arranged adjacent to a first switching element 21 in a second multiplexing unit 210, a first switching element 21 in the second multiplexing unit 210 is arranged adjacent to a second switching element 22 in the first multiplexing unit 210, and a second switching element 22 in the first multiplexing unit 210 is arranged adjacent to a second switching element 22 in the second multiplexing unit 210; on the other hand, along the second direction, any two touch signal lines 51 in the same touch signal line group 510 are arranged at intervals, specifically, a first touch signal line 51 in the first touch signal line group 510 is arranged adjacent to a first touch signal line 51 in the second touch signal line group 510, a first touch signal line 51 in the second touch signal line group 510 is arranged adjacent to a second touch signal line 52 in the first touch signal line group 510, a second touch signal line 52 in the first touch signal line group 510 is arranged adjacent to a second touch signal line 52 in the second touch signal line group 510, and thus, the problem that the first touch electrode 11 in the first touch electrode group 111 is arranged adjacent to the first touch electrode 11 in the second touch electrode group 112 along the first direction X, the first touch electrode 11 in the second touch electrode group 112 is arranged adjacent to the second touch electrode 12 in the first touch signal line group 510, and the problem that the second touch electrode 12 in the first touch electrode group 111 is not detected by the second touch electrode 12 is solved, and the problem that the two touch electrodes are arranged adjacent to each other in the first touch signal line group 10 is detected.

It should be noted that, in the embodiment of the present invention, the number of the touch electrodes 10 is not limited, and the number of the touch electrode rows 100, the number of the touch electrode groups 110 in the touch electrode rows 100, and the number of the touch electrodes 10 in the touch electrode groups 110 are not limited. Fig. 9 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention, and fig. 10 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention, as shown in fig. 9 and 10, the touch display panel 1 includes three touch electrode rows 100, each touch electrode row 100 includes two touch electrode groups 110, namely a first touch electrode group 111 and a second touch electrode group 112, and each touch electrode group 110 includes three touch electrodes 10, namely a first touch electrode 11, a second touch electrode 12 and a third touch electrode 13. The touch display panels provided in fig. 9 and fig. 10 have the corresponding advantages in the above embodiments, and are not described herein again.

Optionally, the touch display panel 1 may further include a driving chip 300; the plurality of touch electrodes 10 may include a plurality of touch electrode rows L0, the touch electrode rows L0 extending along the second direction Y, the plurality of touch electrode rows L0 being arranged along the first direction X; the detection phase of the touch display panel 1 may include a touch detection phase; in the touch detection stage, the driving chip 300 is configured to provide a touch scanning signal to the touch electrode 10 in a time-sharing manner through the touch multiplexing circuit 200, and determine a touch position according to the touch detection signal fed back by the touch electrode 10.

As shown in fig. 3 and fig. 4, in the touch detection stage, in the first touch detection stage, when the first clock control signal TPSWA is at a high level and the second clock control signal TPSWB is at a low level, the first switching element 21 in each multiple-path selection unit 210 is turned on, the driving chip 300 may transmit a touch scanning signal to the first touch electrode 11 in each touch electrode group 110, that is, the touch electrodes 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0 may receive the touch scanning signal, if the touch electrodes 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0 are touched at this time, the corresponding touch electrodes 10 may feed back the touch detection signal to the driving chip 300, and the driving chip 300 may determine the touch position through operation; in the second touch detection stage, when the first clock control signal TPSWA is at a low level and the second clock control signal TPSWB is at a high level, the second switching element 22 in each multiplexing unit 210 is turned on, the driving chip 300 can transmit the touch scanning signal to the second touch electrode 12 in each touch electrode group 110, that is, the touch electrode 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0 can receive the touch scanning signal, if the touch electrode 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0 is touched at this time, the corresponding touch electrode 10 can feed back the touch detection signal to the driving chip 300, and the driving chip 300 can determine the touch position through operation; wherein k is more than or equal to 0, and k is an integer.

The touch display panel 1 in the above embodiment may be a liquid crystal display panel or an organic light emitting display panel. In order to reduce the cost and simplify the process, the structure in the touch display panel 1 is multiplexed into the touch electrode in the embodiment of the invention, for example, when the touch display panel is a liquid crystal display panel, the common electrode of the liquid crystal display panel is multiplexed into the touch electrode; multiplexing a cathode of the organic light-emitting display panel as a touch electrode when the touch display panel is the organic light-emitting display panel; meanwhile, the touch chip and the display chip are integrated into the same chip, and the chip provides a common (cathode) voltage signal and a touch scanning signal for a common electrode (or cathode) in a time-sharing manner in a display driving stage and a touch detection stage. Fig. 11 is a schematic view of a partial film structure of a touch display panel according to an embodiment of the present invention. Alternatively, referring to fig. 11, the touch display panel 1 may further include a pixel electrode 62 and a common electrode 61; the touch electrode 10 is multiplexed as the common electrode 61.

As shown in fig. 11, the touch display panel 100 includes a liquid crystal touch display panel, which includes an array substrate 60, a color film substrate 70, and a liquid crystal layer 80 disposed between the array substrate 60 and the color film substrate 70; the array substrate 60 includes a first metal layer M1, a second metal layer M2, a third metal layer M3, and an insulating layer disposed between the metal layers, and the array substrate 60 includes a plurality of thin film transistors 90; the first metal layer M1 includes a gate electrode 91 of the thin film transistor 90, a scan line, and the like (not shown in the drawing); the second metal layer M2 includes a source electrode 92, a drain electrode 93, a data line, and the like (not shown) of the thin film transistor 90; the third metal layer M3 includes a touch trace 50; the array substrate 60 further includes a common electrode block 61 and a pixel electrode 62, where the common electrode block 61 is electrically connected to the touch trace 50; wherein the common electrode 61 is multiplexed as the touch electrode 10.

When the touch electrode 10 is multiplexed as the common electrode 61, the touch display panel 1 may be divided into a display driving stage and a touch detecting stage. In the display driving stage, the driving chip 300 provides a common voltage signal to the common electrode 61, i.e. the touch electrode 10, to perform display driving on the sub-pixels in the display area aa. In the touch detection stage, the driving chip 300 provides the touch scanning signal to the touch electrode 10, i.e. the common electrode 61 in a time-sharing manner, and determines the touch position according to the touch detection signal fed back by the common electrode 61.

In the embodiment of the invention, the common electrode (cathode) is multiplexed into the touch electrode, and the touch chip and the display chip are integrated into the same chip, so that the chip provides the common electrode (or cathode) with a common (cathode) voltage signal and a touch scanning signal in a time sharing manner in a display driving stage and a touch driving stage, thereby reducing the cost of the display panel.

Based on the same inventive concept, the embodiment of the invention also provides a detection method of a touch display panel, which is applied to the touch display panel described in any one of the embodiments, wherein the touch display panel comprises a driving chip; the plurality of touch electrodes comprise a plurality of touch electrode rows, the touch electrode rows extend along the second direction, and the plurality of touch electrode rows are arranged along the first direction; the detection stage of the touch display panel comprises a short circuit detection stage, and the short circuit detection stage comprises a first sub-detection stage and a second detection stage. Fig. 12 is a flowchart of a method for detecting a touch display panel according to an embodiment of the present invention. As shown in fig. 12, the detection method of the touch display panel includes:

S110, in the first detection stage, short circuit detection signals are transmitted to the touch electrode columns of the odd columns or the even columns, and whether the touch electrode columns of the two adjacent columns are short-circuited is judged according to the detection signals on the touch electrodes of the even columns or the odd columns.

For example, referring to fig. 3 and 5, in the first detection stage T1, when the first clock control signal TPSWA is at a high level and the second clock control signal TPSWB is at a low level, the switching element 20 electrically connected to the touch electrode 10 in the 1+4k row and the 2+4k row is turned on, the driving chip 300 sends a short circuit detection signal to the touch electrode 10 in the odd-numbered columns in the 1+4k row and the 2+4k row, and judges whether a short circuit current exists between the touch electrodes 10 between adjacent columns, that is, whether metal residues exist, according to the detection signals on the touch electrodes 10 on the even-numbered columns in the 1+4k row and the 2+4k row; in addition, the driving chip 300 may also send a short circuit detection signal to the touch electrodes 10 in even columns in the 1+4k row and the 2+4k row, and determine whether a short circuit current exists between the touch electrodes 10 in adjacent columns according to the detection signals on the touch electrodes 10 in odd columns in the 1+4k row and the 2+4k row, that is, whether metal residues exist; wherein k is more than or equal to 0, and k is an integer. Referring to fig. 3 and 6, in the first detection stage T1, when the first clock control signal TPSWA is at a low level and the second clock control signal TPSWB is at a high level, the switching element 20 electrically connected to the adjacent touch electrode 10 in the 3+4k row and the 4+4k row is turned on, the driving chip 300 transmits a short circuit detection signal to the touch electrode 10 of the odd numbered row in the 3+4k row and the 4+4k row, and judges whether a short circuit current exists between the touch electrodes 10 between the adjacent columns, i.e., whether metal residues exist, according to the detection signal on the touch electrode 10 on the even numbered row in the 3+4k row and the 4+4k row; in addition, the driving chip 300 may also send a short circuit detection signal to the touch electrodes 10 in even columns in the 3+4k row and the 4+4k row, and determine whether a short circuit current exists between the touch electrodes 10 in adjacent columns according to the detection signals on the touch electrodes 10 in odd columns in the 3+4k row and the 4+4k row, that is, whether metal residues exist; wherein k is more than or equal to 0, and k is an integer.

S120, in the second detection stage, short circuit detection signals are transmitted to the touch electrode rows of the odd-numbered rows or the even-numbered rows, and whether the two adjacent rows of touch electrode rows are short-circuited is judged according to the detection signals on the touch electrodes of the even-numbered rows or the odd-numbered rows.

For example, referring to fig. 3 and 7, in the second detection phase T2, the first clock control signal TPSWA and the second clock control signal TPSWB are both at high level, all the switching elements 20 are turned on, the driving chip 300 may send a short circuit detection signal to the touch electrodes 10 of the odd-numbered rows (2k+1-th rows), and determine whether the short circuit current exists in the touch electrodes 10 between the adjacent rows according to the detection signal on the touch electrodes 10 of the even-numbered rows (2k+2-th rows), that is, whether the metal residue exists; in addition, the driving chip 300 may also send a short circuit detection signal to the touch electrodes 10 in even rows (2k+2 rows), and determine whether a short circuit current exists in the touch electrodes 10 between adjacent rows, i.e. whether metal residues exist, according to the detection signal on the touch electrode 10 in odd rows (2k+1 rows); wherein k is more than or equal to 0, and k is an integer.

Optionally, the touch display panel may further include a plurality of touch signal source lines and N clock control signal lines; the touch signal source lines are in one-to-one correspondence with the multi-path selection units and are respectively and electrically connected with the touch signal input end and the driving chip; the nth clock control signal line is electrically connected with the control end of the nth switching element in the multi-path selection unit; n is more than or equal to 1 and less than or equal to N, and N is an integer; the first detection stage includes N sub-stages; the step S110 may include: in the nth sub-stage, controlling an nth clock control signal line to transmit an enabling signal to a control end of an nth switching element in the multi-path selection unit, transmitting a short circuit detection signal to odd or even touch electrodes in a plurality of touch electrode rows connected with a second end of the nth switching element, and judging whether two adjacent touch electrodes in the plurality of touch electrode rows are short-circuited or not according to the even touch electrodes in the plurality of touch electrode rows or the detection signals on the odd touch electrodes; the step S120 may include: in the second detection stage, N clock control signal lines are controlled to respectively transmit enabling signals to switching elements connected with the clock control signal lines in the multi-path selection unit, short-circuit detection signals are transmitted to the touch electrode lines of the odd-numbered lines or the even-numbered lines, and whether the two adjacent touch electrode lines are short-circuited is judged according to the detection signals on the touch electrodes of the even-numbered lines or the odd-numbered lines.

For example, referring to fig. 3 and 8, the first detection stage T1 may include two sub-stages, a first sub-stage T1 and a second sub-stage T2. The first sub-stage t1 indicates that the first clock control signal line 41 transmits an enable signal to the control terminal of the first switching element 21 in each multiplexing unit 210 to turn on the corresponding switching element 21; the driving chip 300 transmits a short circuit detection signal to the first end of the first switching element 21 of the multiple selection units 210 through the touch signal source line 310, and transmits the short circuit detection signal to the first touch electrode 11 in each touch electrode group 110 through the second end of the first switching element 21, specifically, the short circuit detection signal can be transmitted to the odd number of touch electrodes 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, and then whether a short circuit exists between two adjacent touch electrodes 10 or not can be judged according to detection signals on the even number of touch electrodes 10 in the same touch electrode row L0; it can be further understood that the signals can be transmitted to the even number of touch electrodes 10 in the 1+4k-th touch electrode row L0 and the 2+4k-th touch electrode row L0, so that whether a short circuit exists between two adjacent touch electrodes 10 or whether metal residues exist can be determined according to the detection signals on the odd number of touch electrodes 10 in the same touch electrode row L0. The second sub-stage t2 indicates that the second clock control signal line 42 transmits an enable signal to the control terminal of the second switching element 22 in each multiplexing unit 210 to turn on the corresponding switching element 22; the driving chip 300 transmits a short circuit detection signal to the first end of the second switching element 22 of the multiple selection unit 210 through the touch signal source line 310, and transmits the short circuit detection signal to the second touch electrode 12 in each touch electrode group 110 through the second end of the second switching element 22, specifically, the short circuit detection signal can be transmitted to the odd number of touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, and then whether a short circuit exists between two adjacent touch electrodes 10 or not can be judged according to the detection signals on the even number of touch electrodes 10 in the same touch electrode row L0; it can be understood that the signals can be transmitted to the even number of touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, so as to determine whether a short circuit exists between two adjacent touch electrodes 10 or whether metal residues exist according to the detection signals on the odd number of touch electrodes 10 in the same touch electrode row L0. In the second detection phase T2, all clock control signal lines 40 transmit enable signals to the control terminals of the first switching element 21 and the second switching element 22 in each multiplexing unit 210 to turn on all switching elements 20; the driving chip 300 transmits the short circuit detection signal to the first ends of all the switching elements 20 of the multiple selection units 210 through the touch signal source line 310, and transmits the short circuit detection signal to the touch electrodes 10 in all the touch electrode rows L0 through the second end of each switching element 20, specifically, the short circuit detection signal can be sent to the touch electrode rows L0 of the odd-numbered rows (2k+1st rows), and then whether a short circuit current exists between two adjacent touch electrode rows L0 or not can be judged according to the detection signal of the touch electrode 10 on the touch electrode row L0 of the even-numbered rows (2k+2nd rows), namely, whether metal residues exist or not; the even number row (2k+2 row) of touch electrode rows L0 may also send a short circuit detection signal, so that whether a short circuit current exists between two adjacent touch electrode rows L0, that is, whether metal residues exist, may be determined according to the detection signal of the touch electrode 10 on the odd number row (2k+1 row) of touch electrode rows L0; wherein k is more than or equal to 0, and k is an integer.

Based on the same inventive concept, the embodiment of the invention also provides a touch display device. Fig. 13 is a schematic structural diagram of a touch display device according to an embodiment of the invention. As shown in fig. 13, the touch display device 0 includes the touch display panel 1 according to any of the embodiments, so that the touch display device 0 provided by the embodiment of the invention has the corresponding beneficial effects in the above embodiments, and will not be described herein. The touch display device may be, for example, an electronic device such as a mobile phone, a computer, a smart wearable device (e.g., a smart watch), and a vehicle-mounted display device, which is not limited in the embodiment of the present invention.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. The touch display panel is characterized by comprising a display area and a non-display area;

the non-display area comprises a touch control multi-path selection circuit;

along the first direction, any two touch electrodes in the same touch electrode group are arranged at intervals of touch electrodes of other touch electrode groups.

2. The touch display panel of claim 1, further comprising a driver chip;

the detection stage of the touch display panel comprises a short circuit detection stage, wherein the short circuit detection stage comprises a first detection stage and a second detection stage;

in the first detection stage, the driving chip is configured to transmit a short circuit detection signal to the touch electrode columns in odd columns or even columns, and determine whether a short circuit exists between two adjacent columns of touch electrode columns according to the detection signal on the touch electrode columns in the even columns or the odd columns;

in the second detection stage, the driving chip is configured to transmit a short circuit detection signal to the touch electrode row in an odd-numbered row or an even-numbered row, and determine whether a short circuit exists between two adjacent rows of touch electrode rows according to the detection signal on the touch electrode in the even-numbered row or the odd-numbered row.

3. The touch display panel of claim 2, further comprising a plurality of touch signal source lines and N clock signal lines;

The touch signal source lines are in one-to-one correspondence with the multi-path selection units and are respectively and electrically connected with the touch signal input end and the driving chip;

the nth clock control signal line is electrically connected with the control end of the nth switching element in the multi-path selection unit; n is more than or equal to 1 and less than or equal to N, and N is an integer;

the first detection stage comprises N sub-stages;

in the nth sub-stage, an nth clock control signal line is used for transmitting an enabling signal to a control end of an nth switching element in the multiplexing unit; the driving chip is used for transmitting short circuit detection signals to odd or even touch electrodes in a plurality of touch electrode rows connected with the second end of the nth switching element, and judging whether two adjacent touch electrodes in the plurality of touch electrode rows are short-circuited or not according to the detection signals on the even or odd touch electrodes in the plurality of touch electrode rows;

in the second detection stage, N clock control signal lines are used for transmitting enable signals to the switching elements connected with the clock control signal lines in the multiplexing unit; the driving chip is used for transmitting a short circuit detection signal to the touch electrode rows in the odd-numbered rows or the even-numbered rows, and judging whether the touch electrode rows in two adjacent rows are short-circuited or not according to the detection signal on the touch electrode in the even-numbered rows or the odd-numbered rows.

4. The touch display panel according to any one of claims 1 to 3, wherein the touch electrode array comprises M touch electrode groups, the touch electrode groups comprise a first touch electrode and a second touch electrode, M is greater than or equal to 2 and M is an integer;

along the first direction, the first touch electrode in the ith touch electrode group is arranged adjacent to the first touch electrode in the (i+1) th touch electrode group, the first touch electrode in the Mth touch electrode group is arranged adjacent to the second touch electrode in the first touch electrode group, and the second touch electrode in the j-th touch electrode group is arranged adjacent to the second touch electrode in the j+1-th touch electrode group; wherein i is more than or equal to 1 and less than or equal to M-1, j is more than or equal to 1 and less than or equal to M-1.

5. The touch display panel of claim 4, further comprising a plurality of touch signal lines electrically connected to the touch signal output and the touch electrodes, respectively;

the touch control multi-path selection circuit comprises M multi-path selection units;

the touch signal lines comprise M touch signal line groups;

the multiple multiplexing units are sequentially arranged along the second direction; the touch signal line groups are sequentially arranged.

6. The touch display panel according to claim 4, wherein the touch multiplexing circuit comprises M multiplexing units, the multiplexing units comprise a first switching element and a second switching element, the first switching element comprises a first touch signal output terminal, and the second switching element comprises a second touch signal output terminal;

the touch display panel further comprises a plurality of touch signal lines, wherein the touch signal lines comprise M touch signal line groups, and the touch signal line groups comprise a first touch signal line and a second touch signal line; the first touch signal line is respectively and electrically connected with the first touch signal output end and the first touch electrode, and the second touch signal line is respectively and electrically connected with the second touch signal output end and the second touch electrode;

along the second direction, the first switching element in the mth multiplexing unit is arranged adjacent to the first switching element in the (m+1) -th multiplexing unit, the first switching element in the mth multiplexing unit is arranged adjacent to the second switching element in the first multiplexing unit, and the second switching element in the (q) -th multiplexing unit is arranged adjacent to the second switching element in the (q+1) -th multiplexing unit; wherein, M is more than or equal to 1 and less than or equal to M-1, q is more than or equal to 1 and less than or equal to M-1;

Along the second direction, the first touch signal line in the w-th touch signal line group is arranged adjacent to the first touch signal line in the w+1th touch signal line group, the first touch signal line in the M-th touch signal line group is arranged adjacent to the second touch signal line in the first touch signal line group, and the second touch signal line in the z-th touch signal line group is arranged adjacent to the second touch signal line in the z+1th touch signal line group; wherein w is more than or equal to 1 and less than or equal to M-1, and z is more than or equal to 1 and less than or equal to M-1.

7. The touch display panel of claim 1, further comprising a driver chip;

the detection stage of the touch display panel comprises a touch detection stage;

in the touch detection stage, the driving chip is used for providing a touch scanning signal for the touch electrode in a time-sharing manner through the touch multi-path selection circuit, and determining a touch position according to the touch detection signal fed back by the touch electrode.

8. The touch display panel of claim 1, further comprising a pixel electrode and a common electrode;

the touch electrode is multiplexed to the common electrode.

9. A method for detecting a touch display panel, which is applied to the touch display panel of any one of claims 1 to 8, wherein the touch display panel comprises a driving chip;

the detection method comprises the following steps:

and in the second detection stage, short circuit detection signals are transmitted to the touch electrode rows of the odd-numbered rows or the even-numbered rows, and whether the touch electrode rows of two adjacent rows are short-circuited is judged according to the detection signals on the touch electrodes of the even-numbered rows or the odd-numbered rows.

10. The method according to claim 9, wherein the touch display panel further comprises a plurality of touch signal source lines and N clock signal lines;

the touch signal source lines are in one-to-one correspondence with the multi-path selection units and are respectively and electrically connected with the touch signal input ends and the driving chip;

the first detection stage comprises N sub-stages;

in the first detection stage, short circuit detection signals are transmitted to the touch electrode columns in odd columns or even columns, and whether short circuit exists between two adjacent columns of touch electrode columns is judged according to the detection signals on the touch electrodes in the even columns or the odd columns, including:

in the nth sub-stage, controlling an nth clock control signal line to transmit an enabling signal to a control end of an nth switching element in the multi-path selection unit, transmitting a short circuit detection signal to odd or even touch electrodes in a plurality of touch electrode rows connected with a second end of the nth switching element, and judging whether a short circuit exists between two adjacent touch electrodes in the plurality of touch electrode rows according to the detection signals on the even or odd touch electrodes in the plurality of touch electrode rows;

In the second detection stage, short circuit detection signals are transmitted to the touch electrode rows of the odd-numbered rows or the even-numbered rows, and whether the short circuit exists between two adjacent rows of touch electrode rows is judged according to the detection signals on the touch electrodes of the even-numbered rows or the odd-numbered rows, including:

in the second detection stage, controlling N clock control signal lines to respectively transmit enable signals to the switching elements connected with the clock control signal lines in the multi-path selection unit, transmitting short circuit detection signals to the touch electrode lines in the odd-numbered lines or the even-numbered lines, and judging whether the two adjacent lines of touch electrode lines are short-circuited or not according to the detection signals on the touch electrodes in the even-numbered lines or the odd-numbered lines.

11. A touch display device comprising the touch display panel of any one of claims 1-8.