CN112925448A

CN112925448A - Touch display panel, detection method thereof and touch display device

Info

Publication number: CN112925448A
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: 2021-06-08
Anticipated expiration: 2041-03-22
Also published as: CN112925448B

Abstract

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

Description

Touch display panel, detection method thereof and touch display device

Technical Field

The invention relates to the technical field of display, 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 human-computer interaction mode, more and more products integrate touch functions into display devices, and the touch display devices are applied. The touch display device generally includes a plurality of touch electrodes, and there may be a metal residue phenomenon between the touch electrodes in 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 and poor touch 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 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 columns, the touch electrode columns extend along a first direction, the touch electrode columns are arranged along a second direction, and the first direction and the second direction are intersected and are parallel to a light emitting surface of the touch display panel;

the touch electrode row comprises a plurality of touch electrode groups, the touch multipath selection circuit comprises a plurality of multipath selection units, and the touch electrode groups correspond to the multipath selection units one by one; the touch electrode group comprises N touch electrodes, the multi-path selection unit comprises N switch elements, first ends of the N switch elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection unit, second ends of the switch elements serve as touch signal output ends of the multi-path selection unit and are electrically connected with the touch electrodes, N is not less than 2, and N is an integer;

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

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 of 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, and 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, transmitting a short-circuit detection signal to the touch electrode rows in odd-numbered rows or even-numbered rows, and judging whether the touch electrode rows in two adjacent rows are short-circuited according to the detection signal on the touch electrode rows in the even-numbered rows or the odd-numbered rows;

and in the second detection stage, transmitting a short circuit detection signal to the odd-numbered or even-numbered touch electrode rows, and judging whether the two adjacent touch electrode rows are short-circuited according to the detection signal on the even-numbered or odd-numbered touch electrode rows.

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

In the touch display panel provided by the embodiment of the invention, the display area comprises a plurality of touch electrodes arranged in a matrix, the plurality of touch electrodes comprise a plurality of touch electrode rows, each touch electrode row comprises a plurality of touch electrode groups, the non-display area comprises a touch multipath selection circuit, the touch multipath selection circuit comprises a plurality of multipath selection units, the touch electrode groups correspond to the multipath selection units one by one, each touch electrode group comprises N touch electrodes, each multipath selection unit comprises N switch elements, the first ends of the N switch elements are electrically connected with each other to serve as the touch signal input end of the multipath selection unit, the second ends of the N switch elements are electrically connected with the N touch electrodes one by one to serve as the touch signal output end of the multipath selection unit, the 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 the extension of the touch electrode row, any two touch electrodes in the same touch electrode group are arranged at intervals, so that the metal residue between the touch electrodes can be detected, and the problems of poor touch and poor touch 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 invention;

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

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

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

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

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

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

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

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

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

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described below by way of specific embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present 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 ' and 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 each of the plurality of switching elements 20 ' is electrically connected to the driving chip 300 '. In the preparation process of the touch display panel, metal residues between the touch electrodes inevitably occur, and the metal residues between the touch electrodes usually cause poor touch, so that the touch detection performance of the touch display panel is poor, and the user experience is influenced. For example, as shown in fig. 1, there is a metal residue P1 between the touch electrode i and the touch electrode i +1, a metal residue P2 between the touch electrode i +4, and a metal residue P3 between the touch electrode i + 5. Therefore, after the touch display panel is manufactured, it is required to detect the touch display panel, that is, to detect whether metal residues exist between the touch electrodes. For example, referring to fig. 1 and fig. 2, in a stage T1 ', the clock control signal TPSWA ' outputs a high level, the clock control signal TPSWB ' outputs a low level, the switch element 20 ' receiving the clock control signal TPSWA ' is turned on, the driving chip 300 ' sends the detection signal to the partial touch electrodes 10 ' in the odd-numbered rows through the switch element 20 ', and determines whether there is metal residue between the touch electrodes 10 ' in the odd-numbered rows according to the current signal fed back by the other touch electrodes 10 ' in the odd-numbered rows, for example, sends the detection signal to the touch electrodes 10 ' in the even-numbered columns in the odd-numbered rows, and determines whether there is metal residue between the touch electrodes 10 ' in the odd-numbered rows according to the current signal fed back by the touch electrodes 10 ' in the odd-numbered columns in the odd-numbered rows; at stage T2 ', the clock control signal TPSWA ' outputs a low level, and when the clock control signal TPSWB ' outputs a high level, the switch element 20 ' receiving the clock control signal TPSWB ' is turned on, the driving chip 300 ' sends the detection signal to the touch electrodes 10 ' in the even-numbered row through the switch element 20 ', and determines whether there is metal residue between the touch electrodes 10 ' in the even-numbered row according to the current signal fed back by the touch electrodes 10 ' in other parts of the even-numbered row, for example, sends the detection signal to the touch electrodes 10 ' in the even-numbered row, and determines whether there is metal residue between the touch electrodes 10 ' in the even-numbered row according to the current signal fed back by the touch electrodes 10 ' in the odd-numbered 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, the metal residue existing between the touch electrodes 10 'in the same row can be detected, but the metal residue existing between the touch electrodes 10' in different rows cannot be detected.

In view of the above technical problems, the touch display panel provided in the embodiments of the present invention includes a display area and a non-display area; the display area comprises a plurality of touch electrodes 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 columns, the touch electrode columns extend along a first direction, the touch electrode columns are arranged along a second direction, and the first direction and the second direction are intersected and are parallel to a light emitting surface of the touch display panel; the touch electrode row comprises a plurality of touch electrode groups, the touch multipath selection circuit comprises a plurality of multipath selection units, and the touch electrode groups correspond to the multipath selection units one by one; the touch electrode group comprises N touch electrodes, the multi-path selection unit comprises N switch elements, first ends of the N switch elements are mutually and electrically connected to serve as touch signal input ends of the multi-path selection unit, second ends of the switch elements serve as touch signal output ends of the multi-path selection unit and are electrically connected with the touch electrodes, N is not less than 2, and N is an integer; along the first direction, any two touch electrodes in the same touch electrode group are arranged at intervals.

In the embodiment of the invention, the display area comprises a plurality of touch electrodes arranged in a matrix, the plurality of touch electrodes comprise a plurality of touch electrode rows, each touch electrode row comprises a plurality of touch electrode groups, the non-display area comprises a touch multipath selection circuit, the touch multipath selection circuit comprises a plurality of multipath selection units, the touch electrode groups and the multipath selection units are in one-to-one correspondence, meanwhile, each touch electrode group comprises N touch electrodes, each multipath selection unit comprises N switch elements, the first ends of the N switch elements are mutually and electrically connected to serve as touch signal input ends of the multipath selection unit, the second ends of the N switch elements and the N touch electrodes are in one-to-one correspondence and electrically connected to serve as touch signal output ends of the multipath selection unit, 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 the extension of the touch electrode row, any two touch electrodes in the same touch electrode group are arranged at intervals, so that the metal residue between the touch electrodes can be detected, and the problems of poor touch and poor touch detection performance are solved.

The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection 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 includes a plurality of touch electrodes 10 arranged in a matrix; the non-display area bb includes a touch multiplex selection circuit 200; the touch electrodes 10 include a plurality of touch electrode rows 100, the touch electrode rows 100 extend along a first direction X, the touch electrode rows 100 are arranged along a second direction Y, and the first direction X intersects with the second direction Y and is 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 correspond to the multiplexing units 210 one to one; the touch electrode group 110 includes N touch electrodes 10, the multi-path selection unit 210 includes N switching elements 20, first ends of the N switching elements 20 are electrically connected to each other 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 to be electrically connected to the touch electrodes 10, N is greater than or equal to 2 and N is an integer; along the first direction X, any two touch electrodes 10 in the same touch electrode group 110 are disposed at intervals.

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

The switching unit 20 may include a transistor, a MOS transistor, or other devices that can perform an on/off function.

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

Illustratively, as shown in fig. 3 and 4, the touch electrodes 10 in the first touch electrode group 111 and the touch electrodes 10 in the second touch electrode group 112 are arranged in a crossed 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, whether metal residue exists between adjacent touch electrodes 10 in the 1+4k th row and the 2+4k th row can be detected, 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 residue exists between adjacent touch electrodes 10 in a 3+4k th row and a 4+4k th row can be detected, wherein k is greater 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 a high level, it may be detected whether metal residue exists between adjacent touch electrodes 10 between the 2k +1 th row and the 2k +2 th row, where k is greater than or equal to 0 and is an integer, that is, metal residue between touch electrodes 10 between different rows of the entire touch display panel 1 may be detected; in addition, it can be understood that, by adopting the technical solution of the embodiment of the present invention, along the diagonal direction of the first direction X and the second direction Y, metal residues between the touch electrodes 10 in different rows 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 row 100, and the number of the touch electrodes 10 in the touch electrode group 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, i.e., a first touch electrode group 111 and a second touch electrode group 112, and each touch electrode group 110 includes two touch electrodes 10, i.e., a first touch electrode 11 and a second touch electrode 12. With continued reference to fig. 3 and 4, correspondingly, the touch multiplexing circuit 200 may include 12 multiplexing units 210, each multiplexing unit 210 including two switching elements 20, i.e., a first switching element 21 and a second switching element 22. Further, the first ends of the two switch elements 20 in each multi-path selection unit 210 are electrically connected to each other and to the driving chip 300, and the first ends of the two switch elements 20 are used as the touch signal input end of the multi-path selection unit 210 and are used for receiving the touch signal of the driving chip 300; the second ends of the two switch elements 20 of each multi-channel selection unit 210 are electrically connected to 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 multi-channel selection unit 210, and are used for transmitting the touch signals of the driving chip 300 to the corresponding touch electrodes 10 in respective conduction states; the control terminals of the two switch 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/off of the respective switch 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 and poor touch detection performance are solved.

Optionally, with continued reference to fig. 3 and fig. 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 touch electrode rows L0 arranged along the first direction X; the detection phase of the touch display panel 1 may include a short detection phase, which may include a first detection phase T1 and a second detection phase T2; in the first detection stage T1, the driving chip 300 is configured to transmit a short-circuit detection signal to the odd-numbered row or even-numbered row of touch electrode rows 100, and determine whether the two adjacent rows of touch electrode rows 100 are short-circuited according to the detection signal on the touch electrode 10 in the even-numbered row or odd-numbered row; in the second testing phase T2, the driver chip 300 is configured to transmit a short detection signal to the odd-numbered or even-numbered touch electrode row L0, and determine whether there is a short circuit between two adjacent rows of touch electrode rows L0 according to the detection signal on the even-numbered or odd-numbered touch electrode 10.

In the first detection stage T1, the driving chip 300 is configured to transmit a short-circuit detection signal to the odd-numbered row or even-numbered row of touch electrode rows 100, and determine whether the two adjacent rows of touch electrode rows 100 are short-circuited according to the detection signal on the touch electrode 10 in the even-numbered row or odd-numbered row. For example, fig. 5 is a schematic diagram of a short circuit detection of the touch display panel provided in fig. 3 at a first detection stage. As shown in fig. 5, in the first detection phase 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 switch element 20 electrically connected to the touch electrodes 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 electrodes 10 in the odd columns in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0, and determines whether a short-circuit current exists between the touch electrodes 10 in the adjacent columns, that is, whether metal residue exists between the touch electrodes 10 in the adjacent columns according to the detection signals on the touch electrodes 10 in the 1+4k touch electrode row L0 and the even columns in the 2+4k touch electrode row L0; in addition, the driving chip 300 may further send a short 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 current exists between the touch electrodes 10 in the adjacent columns, that is, whether metal residue exists, 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; wherein k is not less than 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 at a first detection stage. As shown in fig. 6, in the first detection phase 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 switch element 20 electrically connected to the adjacent touch electrodes 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 electrodes 10 in the odd columns in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, and determines whether a short-circuit current exists between the touch electrodes 10 in the adjacent columns, that is, whether metal residue exists, according to the detection signals on the touch electrodes 10 in the even columns in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0; in addition, the driving chip 300 may further send a short 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 there is a short current between the touch electrodes 10 in the adjacent columns, i.e., whether there is metal residue, 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; wherein k is not less than 0 and k is an integer.

In the second detection phase T2, the driving chip 300 is configured to transmit a short detection signal to the odd-numbered or even-numbered touch electrode row L0, and determine whether there is a short circuit between two adjacent rows of touch electrode rows L0 according to the detection signal on the even-numbered or odd-numbered touch electrode 10. For example, fig. 7 is a schematic diagram of a short circuit detection of the touch display panel provided in fig. 3 at a second detection stage. As shown in fig. 7, in the second detection phase T2, the first clock control signal TPSWA and the second clock control signal TPSWB are both at a high level, all the switch elements 20 are turned on, the driving chip 300 can send a short-circuit detection signal to the touch electrodes 10 in the odd-numbered row (row 2k + 1), and determine whether the touch electrodes 10 in the adjacent rows have a short-circuit current, that is, whether metal residue exists, according to the detection signal on the touch electrodes 10 in the even-numbered row (row 2k + 2); in addition, the driving chip 300 may also send a short-circuit detection signal to the touch electrodes 10 in the even-numbered rows (2 k +2 nd rows), and determine whether the touch electrodes 10 between the adjacent rows have a short-circuit current, that is, whether metal residue exists, according to the detection signal on the touch electrodes 10 in the odd-numbered rows (2 k +1 th rows); wherein k is not less than 0 and k is an integer.

Optionally, with continued reference to fig. 3 and fig. 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 correspond to the multi-path selection units 210 one by one and are respectively electrically connected with the touch signal input end 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 include N sub-phases; in the nth sub-stage, the nth clock control signal line 310 is used for transmitting 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 odd or even touch electrodes 10 in the touch electrode rows L0 connected to the second end of the nth switch element 20, and determine whether there is a short circuit between two adjacent touch electrodes 10 in the touch electrode rows L0 according to the detection signal on the even or odd touch electrodes 10 in the touch electrode rows L0; in the second detection stage T2, the N clock control signal lines are all used to transmit the enable signal to the switch element 20 connected to it in the multiplexing unit 210; the driving chip 300 is configured to transmit a short detection signal to the odd-numbered or even-numbered touch electrode row L0, and determine whether there is a short circuit between two adjacent touch electrode rows L0 according to the detection signal on the even-numbered or odd-numbered touch electrode 10.

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 multi-path selection unit 210; the touch signal source line 310 is used for transmitting the short 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 the on or off of the corresponding switching element 20.

The first detection stage T1 may include N sub-stages, that is, N touch electrodes 10 in each touch electrode group 110, the number of N switch elements 20 in each multiplexing unit 210, N clock control signal lines 40, and N sub-stages are in one-to-one correspondence, that is, in the nth sub-stage, the nth clock control signal line 40 transmits an enable signal to the control terminal of the nth switch element 20 in each multiplexing unit 210 to turn on the corresponding switch element 20, the driving chip 300 transmits a short-circuit detection signal to the first terminal of the nth switch element 20 of each multiplexing unit 210 through the touch signal source line 310 and transmits the second terminal of the nth switch element 20 to the nth 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, i.e. to determine whether there is metal residue. For example, 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 phase T1 may include two sub-phases, a first sub-phase T1 and a second sub-phase T2. The first sub-phase t1 represents that the first clock control signal line 41 transmits the enable signal TPSWA to the control terminal of the first switch element 21 in each multiplexing unit 210 to turn on the corresponding switch element 21; the driving chip 300 transmits the short detection signal to the first end of the first switch element 21 of the multiple selection unit 210 through the touch signal source line 310, and transmits the short detection signal to the first touch electrode 11 in each touch electrode group 110 through the second end of the first switch element 21, specifically, the short detection signal may be transmitted to odd 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 not and whether metal residue exists can be determined according to the detection signal on even touch electrodes 10 in the same touch electrode row L0; it can be understood that the detection signals can be transmitted to even 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 and whether metal residues exist can be determined according to the detection signals on the odd touch electrodes 10 in the same touch electrode row L0; wherein k is not less than 0 and k is an integer. The second sub-phase t2 represents that the second clock control signal line 42 transmits the enable signal TPSWB to the control terminal of the second switch element 22 in each multiplexing unit 210 to turn on the corresponding switch element 22; the driving chip 300 transmits the short detection signal to the first end of the second switch element 22 of the multi-way selection unit 210 through the touch signal source line 310, and transmits the short detection signal to the second touch electrodes 12 in each touch electrode group 110 through the second end of the second switch element 22, specifically, the short detection signal may be transmitted to odd touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, so that whether a short circuit exists between two adjacent touch electrodes 10 or not and whether metal residue exists can be determined according to the detection signal on even touch electrodes 10 in the same touch electrode row L0; it can be understood that the detection signals can be transmitted to even 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 and whether metal residues exist can be determined according to the detection signals on the odd touch electrodes 10 in the same touch electrode row L0; wherein k is not less than 0 and k is an integer. During the second detection period T2, all the clock control signal lines 40 transmit the enable signals TPSWA and TPSWB to the control terminals of the first switch elements 21 and the control terminals of the second switch elements 22 in each multiplexing unit 210, so that all the switch elements 20 are turned on; the driving chip 300 transmits the short-circuit detection signal to the first ends of all the switch elements 20 of the multiple selection unit 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 switch element 20, specifically, the short-circuit detection signal may be sent to the touch electrode row L0 in the odd-numbered row (2 k +1 th row), and then whether a short-circuit current exists between two adjacent touch electrode rows L0, that is, whether metal residue exists may be determined according to the detection signal of the touch electrodes 10 in the even-numbered row (2 k +2 th row) touch electrode row L0; the even-numbered row (2 k + 2) touch electrode row L0 may also send a short-circuit detection signal, and then whether a short-circuit current exists between two adjacent touch electrode rows L0, that is, whether metal residue exists, may be determined according to the detection signal of the touch electrode 10 on the odd-numbered row (2 k + 1) touch electrode row L0; wherein k is not less than 0 and k is an integer.

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

For example, as shown in fig. 3 and 4, each touch electrode column 100 may include two touch electrode groups 110, i.e., a first touch electrode group 111 and a second touch electrode group 112, each touch electrode group 110 may include two touch electrodes 10, i.e., 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 spaced apart along the 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, 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 invention.

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

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

Specifically, in order to achieve the detection of metal residues between the touch electrodes and improve the problems of poor touch and poor touch detection performance, any two touch electrodes 10 in the same touch electrode group 110 may be arranged at intervals along the first direction X, and as shown in fig. 3, the connection relationship between the second end of the switch element 20 and the touch electrodes 10 may be adjusted, for example, the plurality of touch signal lines 50 are divided into a plurality of sequentially arranged touch signal line groups 510 along the second direction Y, and correspondingly, the plurality of multi-path selection units 210 are also sequentially arranged 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, and a total of 12 touch electrode groups 110, each touch electrode group 110 includes two touch electrodes 10, and a total of 24 touch electrodes 10, and correspondingly, includes 24 touch signal lines 50, and is divided into 12 touch signal line groups 510 along the second direction Y, and further, along the second direction Y, the touch multiplexing circuit 200 is divided into 12 multiplexing units 210, such that 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, 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, that is, along the first direction X, any two touch electrodes 10 in the same touch electrode group 110 are disposed at intervals, so as to implement detection of metal residue between touch electrodes, and solve the problems of poor touch and poor touch detection performance.

Optionally, with continued reference to fig. 4, the touch multi-path selection circuit 200 may include M multi-path selection units 210, the multi-path selection unit 210 may include a first switch element 21 and a second switch element 22, the first switch element 21 may include a first touch signal output terminal, and the second switch 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 to the first touch signal output terminal and the first touch electrode 11, respectively, and the second touch signal line 52 is electrically connected to the second touch signal output terminal 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 +1 th 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 qth multiplexing unit 210 is disposed adjacent to the second switching element 22 in the q +1 th multiplexing unit 210; wherein M is more than or equal to 1 and less than or equal to M-1, and 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 + 1-th 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 + 1-th 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-sensitive display panel 1 can be electrically connected between the second end of each switch element 20 and the corresponding touch-sensitive electrode 10 through a touch-sensitive signal line 50, and the touch-sensitive signal line 50 is used for transmitting the short-circuit detection signal to the corresponding touch-sensitive electrode 10. Illustratively, 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 correspondingly, each multiplexing unit 210 includes two switch elements 20, i.e., a first switch element 21 and a second switch element 22, and correspondingly, 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. A second terminal of the first switch element 21, i.e., a first touch signal output terminal, is electrically connected to the first touch electrode 11 through a first touch signal line 51; a second terminal of the second switch element 22, i.e. a second touch signal output terminal, is electrically connected to the second touch electrode 12 through a second touch signal line 52.

In particular, in order to realize the detection of metal residue between touch electrodes and improve the problems of poor touch 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. 4, the connection relationship between the first ends of the switch elements 20 and the driving chip 300 may also be adjusted, for example, on the one hand, any two switch elements 20 in the same multiplexing unit 210 are disposed at intervals along the second direction Y, specifically, the first switch element 21 in the first multiplexing unit 210 is disposed adjacent to the first switch element 21 in the second multiplexing unit 210, the first switch element 21 in the second multiplexing unit 210 is disposed adjacent to the second switch element 22 in the first multiplexing unit 210, and the second switch element 22 in the first multiplexing unit 210 is disposed adjacent to the second switch 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 disposed at intervals, specifically, the first touch signal line 51 in the first touch signal line group 510 is disposed adjacent to the first touch signal line 51 in the second touch signal line group 510, the first touch signal line 51 in the second touch signal line group 510 is disposed adjacent to the second touch signal line 52 in the first touch signal line group 510, the second touch signal line 52 in the first touch signal line group 510 is disposed adjacent to the second touch signal line 52 in the second touch signal line group 510, so that 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, 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, the second touch electrode 12 in the first touch electrode group 111 and the second touch electrode 12 in the second touch electrode group 112 are disposed adjacent to each other, that is, along the first direction X, any two touch electrodes 10 in the same touch electrode group 110 are disposed at intervals, so as to achieve detection of metal residue between touch electrodes, and improve the problems of poor touch and poor touch detection performance.

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 also 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 fig. 10, the touch display panel 1 includes three touch electrode rows 100, each touch electrode row 100 includes two touch electrode groups 110, i.e., a first touch electrode group 111 and a second touch electrode group 112, and each touch electrode group 110 includes three touch electrodes 10, i.e., a first touch electrode 11, a second touch electrode 12, and a third touch electrode 13. The touch display panel provided in fig. 9 and 10 has the corresponding advantages in the above embodiments, and details are not repeated here.

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 touch electrode rows L0 arranged along the first direction X; the detection stage of the touch display panel 1 may include a touch detection stage; 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 the touch position according to the touch detection signal fed back by the touch electrode 10.

For example, as shown in fig. 3 and 4, in the touch detection phase, in the first touch detection phase, 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 switch element 21 in each multiplexing unit 210 is turned on, the driving chip 300 may transmit the touch scan 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 scan signal, if the touch electrodes 10 in the 1+4k touch electrode row L0 and the 2+4k touch electrode row L0 are touched, 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 phase, 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 switch element 22 in each multiplexing unit 210 is turned on, the driving chip 300 can transmit the touch scan signal to the second touch electrodes 12 in each touch electrode group 110, that is, the touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0 can receive the touch scan signal, if the touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0 are touched at this time, the corresponding touch electrodes 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 not less than 0 and k is an integer.

The touch display panel 1 in the above embodiments may be a liquid crystal display panel, and may also be an organic light emitting display panel. In order to reduce the cost and simplify the process, in the embodiment of the present invention, the structure in the touch display panel 1 is reused as the touch electrode, for example, when the touch display panel is a liquid crystal display panel, the common electrode of the liquid crystal display panel is reused as the touch electrode; when the touch display panel is an organic light-emitting display panel, the cathode of the organic light-emitting display panel is reused as a touch electrode; 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 to the common electrode (or the cathode) in a time-sharing manner in the display driving stage and the 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. Optionally, 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 filter substrate 70, and a liquid crystal layer 80 disposed between the array substrate 60 and the color filter 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 the gate electrode 91 of the thin film transistor 90 and a scanning line, etc. (not shown in the figure); the second metal layer M2 includes a source electrode 92, a drain electrode 93, a data line, etc. (not shown in the figure) of the thin film transistor 90; the third metal layer M3 includes the touch trace 50; the array substrate 60 further includes a common electrode block 61 and a pixel electrode 62, wherein the common electrode block 61 is electrically connected to the touch trace 50; the common electrode 61 is reused as the touch electrode 10.

When the touch electrode 10 is reused as the common electrode 61, the touch display panel 1 can be divided into a display driving stage and a touch detection 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, so as to display and drive 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 reused as the touch electrode, the touch chip and the display chip are integrated into the same chip, and the chip provides the common (cathode) voltage signal and the touch scanning signal to the common electrode (or the cathode) in a time-sharing manner in the display driving stage and the touch driving stage, so that the cost of the display panel is reduced.

Based on the same inventive concept, the embodiment of the present invention further provides a detection method for a touch display panel, which is applied to the touch display panel described in any of the above embodiments, and the touch display panel includes 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 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 detection method of a touch display panel according to an embodiment of the present invention. As shown in fig. 12, the method for detecting a touch display panel includes:

s110, in the first detection stage, short-circuit detection signals are transmitted to the odd-numbered rows or the even-numbered rows of touch electrode rows, and whether the two adjacent rows of touch electrode rows are short-circuited is judged according to the detection signals on the touch electrode rows in the even-numbered rows or the odd-numbered rows.

For example, referring to fig. 3 and 5, in the first detection phase 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 switch element 20 electrically connected to the touch electrodes 10 in the 1+4k th row and the 2+4k th row is turned on, the driving chip 300 sends a short-circuit detection signal to the touch electrodes 10 in the odd-numbered columns in the 1+4k row and the 2+4k row, and determines whether a short-circuit current exists between the touch electrodes 10 in the adjacent columns, that is, whether metal residue exists, according to the detection signals on the touch electrodes 10 in the even-numbered columns in the 1+4k row and the 2+4k row; in addition, the driving chip 300 may further send a short-circuit detection signal to the touch electrodes 10 in the even-numbered columns in the 1+4 k-th row and the 2+4 k-th row, and determine whether a short-circuit current exists between the touch electrodes 10 in the adjacent columns according to the detection signal on the touch electrodes 10 in the odd-numbered columns in the 1+4 k-th row and the 2+4 k-th row, that is, whether metal residue exists; wherein k is not less than 0 and k is an integer. Referring to fig. 3 and 6, in the first detection phase 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 sends a short-circuit detection signal to the touch electrode 10 in the odd column in the 3+4k row and the 4+4k row, and determines whether a short-circuit current exists between the touch electrodes 10 in the adjacent columns, that is, whether metal residue exists, according to the detection signal on the touch electrode 10 in the even column in the 3+4k row and the 4+4k row; in addition, the driving chip 300 may further send a short-circuit detection signal to the touch electrodes 10 in the even-numbered columns in the 3+4 k-th row and the 4+4 k-th row, and determine whether a short-circuit current exists between the touch electrodes 10 in the adjacent columns according to the detection signal on the touch electrodes 10 in the odd-numbered columns in the 3+4 k-th row and the 4+4 k-th row, that is, whether metal residue exists; wherein k is not less than 0 and k is an integer.

And S120, in the second detection stage, transmitting a short circuit detection signal to the odd-numbered or even-numbered touch electrode rows, and judging whether the two adjacent touch electrode rows are short-circuited according to the detection signal on the even-numbered or odd-numbered touch electrode rows.

For example, referring to fig. 3 and fig. 7, in the second detection phase T2, the first clock control signal TPSWA and the second clock control signal TPSWB are both at a high level, all the switch elements 20 are turned on, the driving chip 300 can send a short-circuit detection signal to the touch electrodes 10 in the odd-numbered row (row 2k + 1), and determine whether the short-circuit current exists in the touch electrodes 10 between adjacent rows according to the detection signal on the touch electrodes 10 in the even-numbered row (row 2k + 2), that is, whether there is metal residue; in addition, the driving chip 300 may also send a short-circuit detection signal to the touch electrodes 10 in the even-numbered rows (2 k +2 nd rows), and determine whether the touch electrodes 10 between the adjacent rows have a short-circuit current, that is, whether metal residue exists, according to the detection signal on the touch electrodes 10 in the odd-numbered rows (2 k +1 th rows); wherein k is not less than 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 correspond to the multi-path selection units one by one 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 phase comprises N sub-phases; the step S110 may include: in the nth sub-stage, controlling the nth clock control signal line to transmit an enable signal to the control end of the nth switch element in the multi-path selection unit, 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 switch element, and judging whether the adjacent two touch electrodes in the plurality of touch electrode rows are short-circuited according to the detection signals on the even or odd touch electrodes in the plurality of touch electrode rows; the step S120 may include: and in the second detection stage, controlling the N clock control signal lines to respectively transmit enabling signals to the switching elements connected with the N clock control signal lines in the multi-path selection unit, transmitting short-circuit detection signals to the odd-numbered rows or the even-numbered rows of touch electrode rows, and judging whether the two adjacent rows of touch electrode rows are short-circuited according to the detection signals on the even-numbered rows or the odd-numbered rows of touch electrode rows.

Exemplarily, referring to fig. 3 and 8, the first detection phase T1 may include two sub-phases, a first sub-phase T1 and a second sub-phase T2. The first sub-phase t1 represents 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 the short detection signal to the first end of the first switch element 21 of the multiple selection unit 210 through the touch signal source line 310, and transmits the short detection signal to the first touch electrode 11 in each touch electrode group 110 through the second end of the first switch element 21, specifically, the short detection signal may be transmitted to odd 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 not and whether metal residue exists can be determined according to the detection signal on even touch electrodes 10 in the same touch electrode row L0; it can be understood that the detection signals can be transmitted to even 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 and whether metal residue exists can be determined according to the detection signals on the odd touch electrodes 10 in the same touch electrode row L0. The second sub-phase t2 represents that the second clock control signal line 42 transmits the 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 the short detection signal to the first end of the second switch element 22 of the multi-way selection unit 210 through the touch signal source line 310, and transmits the short detection signal to the second touch electrodes 12 in each touch electrode group 110 through the second end of the second switch element 22, specifically, the short detection signal may be transmitted to odd touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, so that whether a short circuit exists between two adjacent touch electrodes 10 or not and whether metal residue exists can be determined according to the detection signal on even touch electrodes 10 in the same touch electrode row L0; it can be understood that the detection signals can be transmitted to even touch electrodes 10 in the 3+4k touch electrode row L0 and the 4+4k touch electrode row L0, and whether a short circuit exists between two adjacent touch electrodes 10 or whether metal residue exists can be determined according to the detection signals on the odd touch electrodes 10 in the same touch electrode row L0. In the second detection period T2, all the clock control signal lines 40 transmit enable signals to the control terminals of the first switching elements 21 and the control terminals of the second switching elements 22 in each multiplexing unit 210 so that all the switching elements 20 are turned on; the driving chip 300 transmits the short-circuit detection signal to the first ends of all the switch elements 20 of the multiple selection unit 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 switch element 20, specifically, the short-circuit detection signal may be sent to the touch electrode row L0 in the odd-numbered row (2 k +1 th row), and then whether a short-circuit current exists between two adjacent touch electrode rows L0, that is, whether metal residue exists may be determined according to the detection signal of the touch electrodes 10 in the even-numbered row (2 k +2 th row) touch electrode row L0; the even-numbered row (2 k + 2) touch electrode row L0 may also send a short-circuit detection signal, and then whether a short-circuit current exists between two adjacent touch electrode rows L0, that is, whether metal residue exists, may be determined according to the detection signal of the touch electrode 10 on the odd-numbered row (2 k + 1) touch electrode row L0; wherein k is not less than 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 present invention. As shown in fig. 13, the touch display device 0 includes the touch display panel 1 according to any of the embodiments, and therefore, the touch display device 0 provided in the embodiment of the present invention has the corresponding beneficial effects in the embodiments, which are not described herein again. For example, the touch display device may be 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 this embodiment of the present invention.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A 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;

2. The touch display panel according to claim 1, further comprising a driving chip;

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

in the first detection stage, 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 according to the detection signal on the touch electrode rows in the even-numbered rows or the odd-numbered rows;

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

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

the touch signal source lines correspond to the multi-path selection units one by one 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 phase comprises N sub-phases;

in the nth sub-stage, the nth clock control signal line is used for transmitting an enable signal to the control end of the nth switching element in the multi-path selection 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 switch element, and judging whether the two adjacent touch electrodes in the plurality of touch electrode rows are short-circuited according to the detection signals on the even or odd touch electrodes in the plurality of touch electrode rows;

in the second detection stage, the N clock control signal lines are all used for transmitting enable signals to the switch elements connected with the clock control signal lines in the multi-path selection unit; the driving chip is used for transmitting short circuit detection signals to the odd-numbered rows or the even-numbered rows of the touch electrode rows and judging whether the two adjacent rows of the touch electrode rows are short-circuited according to the detection signals on the touch electrodes on 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, each touch electrode group comprises 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 jth 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, and j is more than or equal to 1 and less than or equal to M-1.

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

the touch multipath selection circuit comprises M multipath selection units;

the touch signal lines comprise M touch signal line groups;

along the second direction, a plurality of the multi-path selection units are arranged in sequence; the touch signal line groups are arranged in sequence.

6. The touch display panel according to claim 4, wherein the touch multiplexing circuit includes M multiplexing units, the multiplexing unit includes a first switch element and a second switch element, the first switch element includes a first touch signal output terminal, and the second switch element includes 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 electrically connected with the first touch signal output end and the first touch electrode respectively, and the second touch signal line is electrically connected with the second touch signal output end and the second touch electrode respectively;

in the second direction, the first switching element in an M-th multiplexing unit is disposed adjacent to the first switching element in an M + 1-th multiplexing unit, the first switching element in the M-th multiplexing unit is disposed adjacent to the second switching element in the first multiplexing unit, and the second switching element in a q-th multiplexing unit is disposed 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, and 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 + 1-th 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 + 1-th 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 according to claim 1, further comprising a driving 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 to the touch electrode in a time-sharing manner through the touch multipath selection circuit and determining a touch position according to a touch detection signal fed back by the touch electrode.

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

the touch electrode is reused as the common electrode.

9. A method for detecting a touch display panel, the method being 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 a second detection stage, transmitting a short circuit detection signal to the odd-numbered or even-numbered touch electrode rows, and judging whether the two adjacent touch electrode rows are short-circuited according to the detection signal on the even-numbered or odd-numbered touch electrode rows.

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

the first detection phase comprises N sub-phases;

in the first detection stage, transmitting a short-circuit detection signal to the odd-numbered rows or even-numbered rows of the touch electrode rows, and determining whether the two adjacent touch electrode rows are short-circuited according to the detection signal on the even-numbered rows or the odd-numbered rows of the touch electrode rows, including:

in the nth sub-stage, controlling the nth clock control signal line to transmit an enable signal to the control end of the nth switch 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 the second end of the nth switch element, and judging whether two adjacent touch electrodes in the plurality of touch electrode rows are short-circuited according to the detection signal on the even or odd touch electrodes in the plurality of touch electrode rows;

in the second detection stage, transmitting a short circuit detection signal to the odd-numbered or even-numbered touch electrode rows, and determining whether there is a short circuit between two adjacent rows of touch electrode rows according to the detection signal on the even-numbered or odd-numbered touch electrode, including:

and in the second detection stage, controlling the N clock control signal lines to respectively transmit enabling signals to the switching elements connected with the N clock control signal lines in the multi-path selection unit, transmitting short-circuit detection signals 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 according to the detection signals on the touch electrodes in the even-numbered rows or the odd-numbered rows.

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