CN112882610B

CN112882610B - Driving method and driving circuit of touch display panel and touch display device

Info

Publication number: CN112882610B
Application number: CN202110287090.7A
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: 2021-03-17
Filing date: 2021-03-17
Publication date: 2024-03-26
Anticipated expiration: 2041-03-17
Also published as: CN112882610A

Abstract

The invention discloses a driving method and a driving circuit of a touch display panel and a touch display device, wherein the driving method comprises the following steps: applying first touch scanning signals to M touch electrodes in different touch areas in a time-sharing manner, and receiving touch detection signals fed back by the touch electrodes; when the L touch area is determined to be the touch area according to the touch detection signals fed back by the touch electrodes of the L touch area, first touch scanning signals are applied to M touch electrodes of N touch areas in a time-sharing mode so as to determine touch positions; wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N. The technical scheme provided by the invention can improve the problem of touch delay and realize the effect of improving the touch detection performance.

Description

Driving method and driving circuit of touch display panel and touch display device

Technical Field

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

Background

As touch operation is a simple and convenient human-computer interaction mode, more and more products integrate touch functions into a display device. The conventional touch display device comprises a plurality of touch electrodes, touch wires electrically connected with each touch electrode in a one-to-one correspondence manner, and a touch chip electrically connected with the touch wires, wherein the touch wires are used for transmitting touch scanning signals sent by the touch chip. However, as the size of the touch display device increases, the number of touch electrodes and touch traces corresponding to the touch electrodes increases, which results in more signal pins being required to be disposed in the touch chip, thereby increasing the cost of the touch display device.

In order to reduce the number of signal pins, a time-sharing driving mode is generally adopted to provide touch scanning signals for the touch electrodes. However, the time-sharing driving brings a problem of touch delay, which affects touch detection performance.

Disclosure of Invention

The embodiment of the invention provides a driving method and a driving circuit of a touch display panel and a touch display device, which can solve the problem of touch delay and realize the effect of improving touch detection performance.

In a first aspect, an embodiment of the present invention provides a method for driving a touch display panel, where the touch display panel includes Q touch groups sequentially arranged along a pixel row direction or a pixel column direction; the touch area group comprises N touch areas which are sequentially arranged along the arrangement direction of the touch area group; each touch area comprises M touch electrodes;

the driving method of the touch display panel comprises the following steps:

applying first touch scanning signals to M touch electrodes of different touch areas in a time-sharing manner, and receiving touch detection signals fed back by the touch electrodes; wherein, M of the touch electrodes in each touch area apply a time overlap of a first touch scanning signal; and applying a time overlap of a first touch scanning signal to the M touch electrodes of the touch areas with the same sequence numbers of different touch groups;

When the L touch area is determined to be a touch area according to the touch detection signals fed back by the touch electrodes of the L touch area, applying the first touch scanning signals to M touch electrodes of N touch areas in a time-sharing manner to determine touch positions;

wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N

In a second aspect, an embodiment of the present invention provides a driving circuit, where the driving circuit is configured to drive a touch display panel; the touch display panel comprises Q touch groups which are sequentially arranged along the pixel row direction or the pixel column direction; the touch area group comprises N touch areas which are sequentially arranged along the arrangement direction of the touch area group; each touch area comprises M touch electrodes;

the driving circuit includes: the touch driving circuit is used for applying first touch scanning signals to M touch electrodes of different touch areas in a time-sharing mode and receiving touch detection signals fed back by the touch electrodes;

the touch driving circuit is further configured to determine that the L-th touch area is a touch area according to a touch detection signal fed back by the touch electrodes of the L-th touch area, and then apply the first touch scanning signal to the M touch electrodes of the N touch areas in a time-sharing manner to determine a touch position;

Wherein, M of the touch electrodes in each touch area apply a time overlap of a first touch scanning signal; and applying a time overlap of a first touch scanning signal to the M touch electrodes of the touch areas with the same sequence numbers of different touch groups; and Q, L, M and N are both positive integers greater than or equal to 1; l is less than or equal to N.

In a third aspect, an embodiment of the present invention further provides a touch display device, including a touch display panel and the driving circuit described in the second aspect.

According to the driving method, the driving circuit and the touch display device of the touch display panel, the touch display panel is divided into Q touch groups, each touch group comprises N touch areas, each touch area comprises M touch electrodes, first touch scanning signals are provided for the touch electrodes in different touch areas in a time-sharing mode, and touch detection signals fed back by the touch electrodes are received, so that the number of signal pins can be reduced. In addition, when the L-th touch area is determined to be the touch area according to the touch detection signal fed back by the touch electrodes of the L-th touch area, the first touch signal is stopped being provided for the touch electrodes from the L+1-th touch area to the N-th touch area, and then the first touch signal is provided for the touch electrodes in the N touch areas in a time-sharing manner so as to accurately determine the touch position. Because the touch area is determined to be the L-th touch area, the first touch scanning signal is not required to be provided for the touch electrodes in the L+1th touch area to the N-th touch area, namely, compared with the prior art, the time of T2' is shortened, the problem of touch delay can be solved, and the touch detection performance is improved; when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment can be improved, and the use safety of the whole vehicle is further improved.

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 flowchart of a driving method of a touch display panel according to an embodiment of the present invention;

FIG. 5 is a timing chart of a driving method of the touch display panel provided in FIG. 4;

FIG. 6 is a timing diagram of a multi-finger touch provided by an embodiment of the present invention;

FIG. 7 is another timing diagram of multi-finger touches provided by an embodiment of the present invention;

fig. 8 is a flowchart of another driving method of a touch display panel according to an embodiment of the invention;

FIG. 9 is a timing chart of a driving method of the touch display panel provided in FIG. 8;

fig. 10 is a flowchart of a driving method of a touch display panel according to another embodiment of the present invention;

FIG. 11 is a timing chart of a driving method of the touch display panel provided in FIG. 10;

fig. 12 is a comparison diagram of a first touch scan signal and a second touch scan signal according to an embodiment of the present invention;

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

Fig. 14 is a timing chart of a touch display panel according to an embodiment of the invention;

fig. 15 is a schematic view of a part of a film structure of a touch display panel according to an embodiment of the present invention;

fig. 16 is a timing diagram of another touch display panel according to an embodiment of the invention;

fig. 17 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention;

FIG. 18 is a timing diagram of another touch display panel according to an embodiment of the present invention;

fig. 19 is a schematic diagram of a driving circuit according to an embodiment of the present invention;

FIG. 20 is a schematic diagram of another driving circuit according to an embodiment of the present invention;

fig. 21 is a schematic structural diagram of a touch display device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be fully described below by way of specific embodiments with reference to the accompanying drawings in the examples of the present invention. 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. As shown in fig. 1, the conventional touch display panel 100' includes a plurality of touch areas AA ' and a driving circuit 10', wherein each touch area AA ' includes a plurality of touch electrodes 20', and the driving circuit 10' provides touch scanning signals to the touch electrodes 20' in different touch areas AA ' in a time-sharing manner through the touch traces 30 '.

The plurality of touch areas AA ' include a first touch area AA1', a second touch area AA2', a third touch area AA3', and a fourth touch area AA4'. Fig. 2 is a timing diagram of a touch display panel in the prior art. Referring to fig. 1 and 2, in one touch frame T0', scanning of all the touch electrodes 20' in the four touch areas AA ' in the touch display panel 100' is completed, specifically, at a first moment, a touch scanning signal is provided to a plurality of touch electrodes 20' in the first touch area AA1', and a touch detection signal fed back by the touch electrodes 20' is received; at the second moment, providing touch scanning signals to the plurality of touch electrodes 20' in the second touch area AA2', and receiving touch detection signals fed back by the touch electrodes 20 '; at a third moment, providing touch scanning signals to the plurality of touch electrodes 20' in the third touch area AA3', and receiving touch detection signals fed back by the touch electrodes 20 '; at the fourth moment, a touch scanning signal is provided to the plurality of touch electrodes 20' in the fourth touch area AA4', and a touch detection signal fed back by the touch electrodes 20' is received. When the finger touches the first touch area AA2 'after completing the touch scanning of the touch electrode 20' in the second touch area AA2', that is, in the first touch frame T0', the driving circuit 10 'does not detect that the touch electrode 20' in the second touch area AA2 'is touched, and the driving circuit 10' needs to wait until the second touch frame T0 'to detect the touch, then the time of T1' is missed, and T1 'includes, for example, the time of time-sharing scanning the touch electrode 20' in the third touch area AA3 'and the touch electrode 20' in the fourth touch area AA4 'in the first touch frame T0'; after the scanning of all the touch electrodes 20 'in the touch display panel 100' is completed in the second touch frame T0 'in a time-sharing manner, the touch electrodes 20' of the second touch area AA2 'are found only when the finger touches the touch electrodes 20', i.e. the time T2 'is needed, and the time T2' is the time of one touch frame T0', however, according to the principle of touch calculation accuracy, erroneous judgment caused by interference caused by jitter and the like is prevented, and T2' is discarded. Therefore, after the third touch frame T0 'completes the scanning of all the touch electrodes 20' in the touch display panel 100', the touch position data is collected, and the time T3' is needed, and the time T3 'is also the time of one touch frame T0'. Then enter the phase T4', T4' is the data processing and touch position determining phase, T4' time is related to the operation speed of the touch chip. As can be seen from the above, the time required for completing the whole process of touch position determination is T1'+t2' +t3'+t4' =t1 '+2t0' +t4', i.e. the determination from the touch to the touch position is delayed by about T1' +2t0'+t4', which affects the touch detection performance. When the touch display panel is applied to a vehicle, the sensitivity of the operation of the equipment in the vehicle is deteriorated due to the too slow touch response, so that the use safety of the whole vehicle is affected.

Based on the technical problems, the embodiment of the invention provides a driving method, a driving circuit and a touch display device of a touch display panel, wherein the touch display panel comprises Q touch groups sequentially arranged along the pixel row direction or the pixel column direction; the touch control group comprises N touch control areas which are sequentially arranged along the arrangement direction of the touch control group; each touch area comprises M touch electrodes; the driving method of the touch display panel comprises the following steps: applying first touch scanning signals to M touch electrodes in different touch areas in a time-sharing manner, and receiving touch detection signals fed back by the touch electrodes; wherein, M touch electrodes in each touch area apply the time overlapping of the first touch scanning signal; and applying a time overlap of the first touch scanning signal to M touch electrodes of the touch area with the same sequence number of different touch groups; when the L touch area is determined to be the touch area according to the touch detection signals fed back by the touch electrodes of the L touch area, first touch scanning signals are applied to M touch electrodes of N touch areas in a time-sharing mode so as to determine touch positions; wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N.

By adopting the technical scheme, the touch display panel is divided into Q touch areas, each touch area comprises N touch areas, each touch area comprises M touch electrodes, first touch scanning signals are provided for the touch electrodes in different touch areas through time sharing, and touch detection signals fed back by the touch electrodes are received, so that the number of signal pins can be reduced. In addition, when the touch detection signal fed back by the touch electrode of the L-th touch area is received, and the L-th touch area is determined to be the touch area, the first touch signal is stopped being provided for the touch electrodes from the L+1-th touch area to the N-th touch area, and then the first touch signal is provided for the touch electrodes in the N touch areas in a time-sharing manner so as to accurately determine the touch position. Because the touch area is determined to be the L-th touch area without providing the first touch scanning signal for the touch electrodes in the L+1-th touch area to the N-th touch area, the time of T2' is shortened compared with the prior art, the problem of touch delay is further improved, and the effect of improving the touch detection performance is realized; when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment is improved, and the use safety of the whole vehicle is further improved.

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 flowchart of a driving method of a touch display panel according to an embodiment of the present invention. Referring to fig. 3, the touch display panel 100 includes Q touch area groups AA0 sequentially arranged along a pixel row direction or a pixel column direction; the touch area group AA0 comprises N touch areas AA which are sequentially arranged along the arrangement direction of the touch area group; each touch area AA includes M touch electrodes (not shown). In fig. 3, the touch display panel 100 includes 2 touch area groups AA0 sequentially arranged along the pixel row direction, and each touch area group AA0 includes 4 touch areas AA along the pixel row direction. It will be appreciated that, for clarity of illustration of each touch area group AA0 and the touch area AA in each touch area group AA0, the touch electrodes are not shown in fig. 3.

Referring to fig. 4, the driving method of the touch display panel includes:

s110, applying first touch scanning signals to M touch electrodes in different touch areas in a time-sharing manner, and receiving touch detection signals fed back by the touch electrodes; wherein, M touch electrodes in each touch area apply the time overlapping of the first touch scanning signal; and applying a time overlap of the first touch scanning signal to M touch electrodes of the touch areas with the same sequence numbers of different touch groups.

Wherein, all touch electrodes in the same touch area AA apply the time overlapping of the first touch scan signal. By way of example, with continued reference to fig. 3, two touch granules AA0 are a first touch granule AA01 and a second touch granule AA02, respectively; the four touch areas AA are a first touch area AA1, a second touch area AA2, a third touch area AA3, and a fourth touch area AA4, respectively. Applying a time overlap of a first touch scan signal to all touch electrodes within the first touch area AA 1; applying a time overlap of the first touch scan signal to all touch electrodes within the second touch area AA 2; applying a time overlap of the first touch scan signal to all touch electrodes within the third touch area AA 3; all touch electrodes within the fourth touch area AA4 apply the time overlap of the first touch scan signal.

Wherein, the time overlapping of the first touch scanning signal is applied to all touch electrodes of the touch areas with the same sequence number of different touch groups AA 0. For example, with continued reference to fig. 3, the time of applying the first touch scan signal to all the touch electrodes within the first touch area AA1 in the first touch area group AA01 and the time of applying the first touch scan signal to all the touch electrodes within the first touch area AA1 in the second touch area group AA02 overlap; … …; the time of the first touch scan signals applied by all the touch electrodes in the fourth touch area AA4 in the first touch area group AA01 and the time of the first touch scan signals applied by all the touch electrodes in the fourth touch area AA4 in the second touch area group AA02 overlap.

It should be noted that, in the embodiment, the touch electrode in the touch display panel 100 may be a self-capacitance touch electrode or a mutual capacitance touch electrode, which is not limited herein, and may be set by a person skilled in the art according to practical situations. If the touch electrode is a self-capacitance touch electrode, the working process is as follows: each touch electrode corresponds to a determined coordinate position, the touch electrodes and the ground form a capacitor respectively, when a finger touches the touch display panel, the capacitor of the finger is superimposed on the touch electrode touched by the finger, so that the capacitance to the ground of the touch electrode touched by the finger changes, namely, the signals of the touch electrodes change, therefore, the specific change of the capacitance to the ground of the touch electrode can be determined by detecting the touch detection signals fed back by the M touch electrodes of each touch area, and then the touch position of the finger and the touch area touched by the finger can be determined according to the coordinate value corresponding to the touch electrode with the changed capacitance to the ground. If the touch electrode is a mutual capacitance type touch electrode, the working process is as follows: the mutual capacitance type touch electrode comprises a touch driving electrode and a touch detection electrode, wherein projections between the touch driving electrode and the touch detection electrode overlap, capacitance is formed at the crossing position of the two groups of electrodes, and when a finger touches the touch display panel, the coupling between the two electrodes near a touch point is influenced, namely the capacitance between the two electrodes is changed. When the capacitance is detected, excitation signals are sequentially sent to the touch control driving electrodes, and all the touch control detection electrodes receive signals simultaneously, so that the capacitance value of the junction of all the touch control driving electrodes and the touch control detection electrodes, namely the capacitance of the two-dimensional plane of the whole touch control display panel, can be obtained. According to the two-dimensional capacitance variation data of the touch display panel, coordinate values of each touch point can be calculated, and further the touch position of the finger and the touch area of the touch are determined. Optionally, when the touch electrode is a mutual capacitive touch electrode, the touch driving electrode and the touch detecting electrode in the mutual capacitive touch electrode may be arranged in the same layer in an insulating manner, or may be located in different film layers. The present embodiment is not particularly limited.

Optionally, the time for applying the first touch scanning signal by the M touch electrodes in each touch area AA is the same; and the time for applying the first touch scanning signal to the M touch electrodes of the touch area AA with the same sequence number in different touch areas AA0 is the same. The arrangement has the advantages that the touch detection precision is improved; in addition, the same control signal is used for providing the first touch scanning signal for all the touch electrodes in the touch area AA with the same sequence number in different touch groups AA0, so that wiring can be reduced, process steps can be simplified, and the preparation efficiency of the touch display panel can be improved.

S120, when the L touch area is determined to be the touch area according to the touch detection signal fed back by the touch electrodes of the L touch area, first touch scanning signals are applied to M touch electrodes of N touch areas in a time-sharing mode so as to determine touch positions; wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N.

Fig. 5 is a timing chart of a driving method of the touch display panel provided in fig. 4. For example, referring to fig. 3 and 5, if the touch area is the second touch area AA2, in step S110, the first touch scanning signals are applied to the M touch electrodes in the first touch area AA1 and the second touch area AA2 in a time-sharing manner, and the touch detection signals fed back by the touch electrodes are received. In step S120, the second touch area AA2 is determined as the touch area according to the touch detection signal fed back by the touch electrodes of the second touch area AA2, and the application of the first touch scanning signals to the M touch electrodes in the third touch area AA3 and the fourth touch area AA4 is stopped. And then applying first touch scanning signals to M touch electrodes of the 4 touch areas AA in a time sharing mode so as to determine touch positions.

For example, compared with the prior art (fig. 2), in the present embodiment, when the finger touches the second touch area AA2, after completing the touch scanning on the touch electrode in the second touch area AA2, i.e. in the first touch frame T0, the touch detection signal fed back by the touch electrode in the second touch area AA2 is not received, and the touch can not be detected until the second touch frame T0, the time T1 is missed, and the time T1 includes the time of time-sharing scanning the touch electrode in the third touch area AA3 and the time-sharing scanning the touch electrode 20 in the fourth touch area AA4 in the first touch frame T0.

And when the next touch frame is performed, continuing to apply the first touch scanning signal to the touch electrodes in the different touch areas AA in a time sharing manner, and continuing to receive the touch detection signals fed back by the touch electrodes, namely, applying the first touch scanning signal to the touch electrodes in the first touch area AA1 and the second touch area AA2 in a time sharing manner, and receiving the touch detection signals fed back by the touch electrodes in the first touch area AA1 and the touch detection signals fed back by the touch electrodes in the second touch area AA2 in a time sharing manner, namely, step S110.

At this time, according to the touch detection signal fed back by the touch electrodes of the second touch area AA2, the second touch area AA2 may be determined as the touch area for the first time, so that the application of the first touch scanning signal to the touch electrodes of the third touch area AA3 and the fourth touch area AA4 is stopped, and the first touch scanning signal is applied to all the touch areas, i.e., the touch electrodes in the first touch area AA1, the second touch area AA2, the third touch area AA3 and the fourth touch area AA4, in a re-time sharing manner, so as to further accurately determine the touch position, i.e., step S120.

And finally, entering a T4 stage, wherein the T4 stage is a data processing and touch position determining stage, and because the touch detection signals fed back at the moment are only some changes and differences of capacitance, some processing and operation are needed, namely, the data processing and operation are carried out on the touch detection signals fed back by the touch electrodes of the second touch area AA2, so that the touch position is accurately determined.

However, in the prior art (see fig. 2), when the second touch area AA2' is determined to be the touch area for the first time according to the touch detection signal fed back by the touch electrode 20' of the second touch area AA2', the first touch scan signal needs to be applied to the touch electrodes 20' of the third touch area AA3' and the fourth touch area AA4' in a time-sharing manner, however, in order to avoid erroneous judgment caused by interference caused by jitter, the time T2' needed in the process is lost, and the first touch scan signal needs to be applied to the touch electrodes of all the touch areas in a time-sharing manner again to obtain accurate touch positions.

As can be seen from the above, by adopting the technical solution of the embodiment of the present invention, the time for completing the accurate determination of the touch position is t1+t2+t3+t4=t1+t2+t0+t4, where T1 is the same as T1 'in the prior art, T0 is the same as T0' in the prior art, T4 is the same as T4 'in the prior art, and T2 is less than T0 because it is not necessary to apply the first touch scanning signal to the M touch electrodes of the third touch area AA3 and to the M touch electrodes of the fourth touch area AA4, compared with the time required for completing the whole process of determining the touch position in the prior art is T1' +2t0'+t4', which improves the problem of touch delay and achieves the effect of improving the touch detection performance; when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment is improved, and the use safety of the whole vehicle is further improved.

It can be understood that, in fig. 5, only the second touch area AA2 is taken as the L-th touch area for example, in step S110, the first touch scan signal needs to be applied to the touch electrodes of the first touch area AA1 and the second touch area AA2 in a time-sharing manner, and the touch detection signal fed back by the touch electrodes is received; if the first touch area AA1 is taken as the L-th touch area for illustration, in step S110, only the first touch scanning signal is required to be applied to the touch electrode of the first touch area AA1, and the touch detection signal fed back by the touch electrode is received; if the third touch area AA3 is taken as the L-th touch area for illustration, in step S110, the first touch scanning signal is required to be applied to the touch electrodes of the first touch area AA1, the second touch area AA2 and the third touch area AA3 in a time-sharing manner, and the touch detection signal fed back by the touch electrodes is received.

The above example is described by taking a single-finger touch, that is, a single-finger touch to the touch display panel as an example, but the present application is not limited thereto. In other alternative embodiments, a multi-finger touch is also possible, i.e. a multi-finger touch to the touch display panel. When the touch is multi-finger touch, a plurality of touch positions can be positioned at different positions of the same touch area; it is also possible to touch different touch areas. Optionally, when the touch areas are respectively located in at least two different touch areas, the at least two different touch areas include an L-th touch area and a Z-th touch area, where the Z-th touch area is one of the l+1-th touch area to the N-th touch area.

Exemplary, fig. 6 is a timing diagram of multi-finger touch provided by an embodiment of the present invention, and fig. 7 is another timing diagram of multi-finger touch provided by an embodiment of the present invention. As shown in fig. 6, when the touch is multi-finger touch and the touch positions are located at different positions of the same touch area, for example, the touch positions are all located in the second touch area AA2, a first touch scanning signal is applied to the touch electrodes of the first touch area AA1 and the second touch area AA2 in a time-sharing manner, and a touch detection signal fed back by the touch electrodes is received; when the touch area of the second touch area AA2 is determined for the first time according to the touch detection signal fed back by the touch electrodes of the second touch area AA2, the application of the first touch scanning signal to the touch electrodes of the third touch area AA3 and the fourth touch area AA4 is stopped, and then the first touch scanning signal is applied to all the touch areas, namely, the touch electrodes of the first touch area AA1, the second touch area AA2, the third touch area AA3 and the fourth touch area AA4 again, so that the accurate touch positions are different positions in the second touch area AA2. As shown in fig. 7, when the touch is multi-finger, and the touch positions are located in different touch areas, such as the first touch area AA1 and the second touch area AA2, in the stage T2, when the first touch area AA1 is determined to be the touch area for the first time according to the touch detection signal fed back by the touch electrode of the first touch area AA1, the application of the first touch scanning signal to the touch electrodes of the second touch area AA2, the third touch area AA3 and the fourth touch area AA4 is still stopped, and then the first touch scanning signal is applied to all the touch areas, i.e., the touch electrodes of the first touch area AA1, the second touch area AA2, the third touch area AA3 and the fourth touch area AA4 again, so that the accurate touch positions are the first touch area AA12 and the second touch area AA2. That is, when the touch mode is multi-finger touch and the touch positions are located in different touch areas AA, in the stage T2, only the first touch scanning signal is applied to the touch electrode of one of the touch areas AA of the different touch areas, and even if the other touch areas have touches, the scanning of the other touch areas is stopped.

Based on the above embodiments, the embodiment of the present invention further provides another touch method of the touch display panel, and fig. 8 is a flowchart of another driving method of the touch display panel according to the embodiment of the present invention. As shown in fig. 8, the driving method of the touch display panel may include:

s210, applying first touch scanning signals to M touch electrodes in different touch areas in a time-sharing manner, and receiving touch detection signals fed back by the touch electrodes; wherein, M touch electrodes in each touch area apply the time overlapping of the first touch scanning signal; and applying a time overlap of the first touch scanning signal to M touch electrodes of the touch areas with the same sequence numbers of different touch groups.

And S220, when the L touch area is determined to be the touch area according to the touch detection signals fed back by the touch electrodes of the L touch area, applying first touch scanning signals to M touch electrodes of part of the L+1 touch area to the N touch area in a time-sharing manner.

Fig. 9 is a timing chart of a driving method of the touch display panel provided in fig. 8. For example, referring to fig. 3 and 9, when a finger touches the L-th touch area, such as the second touch area AA2, after the touch electrode in the second touch area AA2 is scanned, that is, when the touch electrode in the second touch area AA2 is touched, the touch driving circuit cannot detect the touch, and the touch can be detected only by the next touch frame T0, so that the time T1 is missed, where T1 includes the time of time-sharing scanning the touch electrode in the third touch area AA3 and the time of time-sharing scanning the touch electrode in the fourth touch area AA 4. When the next touch frame T0 is received, a touch detection signal fed back by the touch electrode of the second touch area AA2 is received, and the second touch area AA2 is determined as the touch area for the first time, and at this time, compared with fig. 5, the first touch scanning signal may be continuously applied to the touch electrode of the third touch area AA3 or the fourth touch area AA 4. It should be understood that, in fig. 9, the application of the first touch scan signal to the touch electrode of the third touch area AA3 is merely illustrated as an example, and the application of the first touch scan signal to the touch electrode of the fourth touch area AA4 may also be performed, which is not limited by the embodiment of the present invention. In addition, it should be noted that, fig. 9 only illustrates that the second touch area AA2 is the L-th touch area, so that the l+1th touch area to the nth touch area only have the third touch area AA3 and the fourth touch area AA4, and one touch area needs to be selected to apply the first touch scanning signal to the touch electrode therein; if the L-th touch area is determined to be a touch area, and the number of touch areas from the l+1-th touch area to the N-th touch area is greater than 2, the exemplary number of touch areas from the l+1-th touch area to the N-th touch area is 4, and if the touch areas include the third touch area, the fourth touch area, the fifth touch area and the sixth touch area, any one touch area, any two touch areas or any three touch areas can be selected for time-sharing application of the first touch scanning signal, so long as the first touch scanning signal is not applied to the touch electrodes of all of the l+1-th touch area to the N-th touch area. Compared with the prior art, the method and the device for providing the first touch scanning signal in the second touch area T0' in a time-sharing manner are used for providing the first touch scanning signal in the time-sharing manner for only M touch electrodes of part of touch areas from the L+1th touch area to the N touch area, so that the time period of T2 is shortened, meanwhile, omission of new touch points can be avoided, and the touch efficiency and the touch accuracy are improved.

S230, applying first touch scanning signals to M touch electrodes of N touch areas in a time-sharing mode to determine touch positions; wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N.

After determining that the L touch area is the touch area according to the touch detection signals fed back by the touch electrodes of the L touch area, continuing to apply first touch scanning signals to M touch electrodes of part of the touch areas from the L+1 touch area to the N touch area in a time sharing manner, after detecting whether new touch points are missed, applying the first touch scanning signals to the touch electrodes of all the touch areas in a time sharing manner, wherein the time is T3, and finally, entering a T4 stage, and performing data processing and touch position determining stages.

As can be seen from the above description, referring to fig. 9, by adopting the technical solution of the embodiment of the present invention, the time for completing the determination of the touch position is t1+t2+t3+t4=t1+t2+t0+t4, where T1 is the same as T1' in the prior art, T0 is the same as T0' in the prior art, T4 is the same as T4' in the prior art, and T2 only needs to apply the first touch scan signal to the touch electrodes of the first touch area AA1 and the second touch area AA2 and the touch electrode of the third touch area AA3 or the touch electrode of the fourth touch area AA4, so that although T2 shown in fig. 9 is larger than T2 shown in fig. 5, it is still smaller than T0, and the problem of touch delay is improved, so that the omission of a new touch point is avoided while the touch detection performance is improved, and the touch efficiency and the accuracy are improved; when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment and the use safety of the whole vehicle can be improved.

On the basis of the above embodiments, the embodiment of the present invention further provides another touch method of the touch display panel, and fig. 10 is a flowchart of another driving method of the touch display panel according to the embodiment of the present invention. As shown in fig. 10, the driving method of the touch display panel may include:

s310, applying first touch scanning signals to M touch electrodes in different touch areas in a time-sharing mode, and receiving touch detection signals fed back by the touch electrodes. Wherein, M touch electrodes in each touch area apply the time overlapping of the first touch scanning signal; and applying a time overlap of the first touch scanning signal to M touch electrodes of the touch areas with the same sequence numbers of different touch groups.

S320, when the L touch area is determined to be the touch area according to the touch detection signal fed back by the touch electrode of the L touch area, applying a second touch scanning signal to M touch electrodes from the L+1 touch area to the N touch area in a time-sharing manner; the duration of applying the second touch scanning signal is less than the duration of applying the first touch scanning signal.

Fig. 11 is a timing chart of a driving method of the touch display panel provided in fig. 10. Referring to fig. 3 and 11, when a finger touches the L-th touch area, such as the second touch area AA2, after the touch electrode in the second touch area AA2 is scanned, that is, when the touch electrode in the second touch area AA2 is touched, the touch driving circuit does not detect the touch, and the touch driving circuit needs to wait until the next touch frame T0 to detect the touch, and then the time T1 is missed, where T1 includes the time of time-sharing scanning the touch electrode in the third touch area AA3 and the time of time-sharing scanning the touch electrode in the fourth touch area AA 4. When the next touch frame T0 is received, a touch detection signal fed back by the touch electrode of the second touch area AA2 is received, the second touch area AA2 is determined as the touch area for the first time, and at this time, the second touch scanning signal can be continuously applied to the touch electrodes in the third touch area AA3 and the fourth touch area AA4 in a time-sharing manner, and the duration of applying the second touch scanning signal is shorter than that of applying the first touch scanning signal. In this embodiment, in order to avoid the situation that multi-touch may occur when the second touch area AA2 is determined to be the touch area for the first time by applying the first touch scan signal to the touch electrodes in the first touch area AA1 and the second touch area AA2, the second touch scan signal may also be applied to other touch areas except the first touch area AA1 and the second touch area AA2, that is, the touch electrodes in the third touch area AA3 and the fourth touch area AA4 in a time-sharing manner, and the detection accuracy at this time does not need to be very high, so the duration of the second touch scan signal applied may be shorter than the duration of the first touch scan signal applied, for example, fig. 12 is a comparison chart of the first touch scan signal and the second touch scan signal provided in the embodiment of the present invention, and as shown in fig. 10, the duration of the second touch scan signal S2 is half the duration of the first touch scan signal S1. It is understood that the duration of applying the second touch scan signal S2 and the duration of applying the first touch scan signal S1 may be set by those skilled in the art according to practical situations.

S330, applying first touch scanning signals to M touch electrodes of N touch areas in a time-sharing manner to determine touch positions, wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N.

And after determining that the L touch area is the touch area according to the touch detection signals fed back by the touch electrodes of the L touch area, continuing to apply second touch scanning signals to M touch electrodes from the L+1 touch area to the N touch area in a time sharing manner, and after detecting whether new touch points are missed, applying first touch scanning signals to the touch electrodes of all the touch areas in a time sharing manner again, wherein the time is T3, and finally, entering a fourth touch frame T0, namely a T4 stage, and performing data processing and touch position determining stage.

As can be seen from the above, referring to fig. 11, the time for completing the touch position determination by adopting the technical scheme of the embodiment of the present invention is t1+t2+t3+t4=t1+t2+t0+t4, where T1 is the same as T1' in the prior art, T0 is the same as T0' in the prior art, T4 is the same as T4' in the prior art, and T2 is the same as T0 in the prior art, because the first touch scanning signal is applied to the touch electrodes of the first touch area AA1 and the second touch area AA2, the second touch scanning signal is applied to the touch electrodes of the third touch area AA3 and the fourth touch area AA4, and the duration of applying the second touch scanning signal is less than the duration of applying the first touch scanning signal, so that T2 shown in fig. 11 is larger than T2 shown in fig. 5, but less than T0, the problem of improving the touch delay is solved, and the missing of a new touch point is avoided, and the touch efficiency and the touch rate is improved; when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment and the use safety of the whole vehicle can be improved.

In view of the above, the embodiments of the present invention provide three driving methods of a touch display panel, when a touch detection signal fed back by a touch electrode of an L-th touch area is received, and it is determined that the L-th touch area is a touch area, the supply of a first touch signal to the touch electrodes of the l+1th touch area to the N-th touch area is stopped, and a first touch scan signal is applied to the touch electrodes of all the touch areas in a re-time sharing manner, so as to accurately determine a touch position; or when the L-th touch area is determined to be a touch area, stopping providing a first touch signal to the touch electrodes of the L+1-th touch area to the N-th touch area, continuing to apply a first touch scanning signal to the M touch electrodes of part of the L+1-th touch area to the N-th touch area so as to avoid omission of new touch points, and then applying the first touch scanning signal to the touch electrodes of all the touch areas in a time sharing manner so as to accurately determine touch positions; or when the L-th touch area is determined to be the touch area, stopping providing the first touch signals to the touch electrodes of the L+1-th touch area to the N-th touch area, continuing to apply the second touch scanning signals with the duration shorter than the duration of the first touch scanning signals to the M touch electrodes of the L+1-th touch area to the N-th touch area, and then applying the first touch scanning signals to the touch electrodes of all the touch areas in a time sharing manner so as to accurately determine the touch position. According to the three technical schemes, compared with the prior art, the time of T2' can be shortened, so that the problem of touch delay is solved, and the effect of improving the touch detection performance is achieved; when the touch display panel is applied to a vehicle, the sensitivity of corresponding equipment is improved, and the use safety of the whole vehicle is further improved.

The display panel 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 display panel is multiplexed into the touch electrode in this embodiment, for example, when the display panel is a liquid crystal display panel, the common electrode of the liquid crystal display panel is multiplexed into the touch electrode; when the display panel is an organic light-emitting display panel, multiplexing a cathode of the organic light-emitting display panel 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 for the common electrode (or cathode) in a time-sharing manner in a display driving stage and a touch driving stage. The display and touch time-sharing driving will be described in detail below.

Fig. 13 is a schematic structural diagram of another touch display panel according to an embodiment of the present invention, fig. 14 is a timing chart of a touch display panel according to an embodiment of the present invention, and fig. 15 is a schematic structural diagram of a portion of a film layer of a touch display panel according to an embodiment of the present invention. Alternatively, referring to fig. 13, the touch display panel 100 may include at least one display area VA sequentially arranged along the pixel column direction (fig. 11 illustrates that the touch display panel 100 includes only one display area VA, and a plurality of rows of sub-pixels 40 are disposed in the display area VA. Referring to fig. 14, each image frame may include at least one display driving stage P and a plurality of touch driving stages C; each image frame may include K touch frames, where K is a positive integer greater than or equal to 1, and each touch frame may include a plurality of touch driving phases C; fig. 12 only exemplifies that each image frame includes 1 touch frame, and that 1 touch frame includes 4 touch driving phases C. Referring to fig. 15, the touch display panel 100 may include a liquid crystal touch display panel, which may include an array substrate 110, a color film substrate 120, and a liquid crystal layer 130 disposed between the array substrate 110 and the color film substrate 120; the array substrate 110 may include 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 110 may include a plurality of thin film transistors 50; the first metal layer M1 may include a gate electrode 51 of the thin film transistor 50, a scan line, and the like (not shown in the drawing); the second metal layer M2 may include a source electrode 53, a drain electrode 54, a data line, etc. of the thin film transistor 50 (not shown in the drawings); the third metal layer M3 may include a touch trace 30; the array substrate 110 may further include a common electrode block 70 and a pixel electrode 60, where the common electrode block 70 is electrically connected to the touch trace 30; wherein the common electrode 70 is multiplexed as the touch electrode 20.

Applying a first touch scanning signal to M touch electrodes of different touch areas in a time sharing manner, wherein the method comprises the following steps: and applying first touch scanning signals to the M touch electrodes of different touch areas in a one-to-one corresponding time sharing mode in a plurality of touch driving stages C of each touch frame. Applying a first touch scanning signal to M touch electrodes of N touch areas in a time sharing manner, wherein the method comprises the following steps: and applying first touch scanning signals to M touch electrodes of N touch areas in a time sharing mode corresponding to the touch driving phases C one by one in each touch frame. The driving method may further include: in the display driving stage P, the subpixels 40 in the display area VA are display-driven.

Specifically, when the common electrode 70 is multiplexed into the touch electrode 20, touch and display time-sharing driving is required, that is, first touch scanning signals are applied to M touch electrodes of N touch areas in a time-sharing manner corresponding to the multiple touch driving phases C of each touch frame, that is, the signals received by the common electrode 70 (20) are the first touch scanning signals; in the display driving stage P, the sub-pixels 40 in the display area VA are display-driven, that is, at this time, the signal received by the common electrode 70 (20) is a common voltage signal. In this embodiment, a common electrode (cathode) of the display panel is multiplexed 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 for a common electrode (or a cathode) in a time-sharing manner in a display driving stage and a touch driving stage, so that the cost of the display panel is reduced.

It should be noted that fig. 15 only takes the thin film transistor 50 in the touch display panel 100 as an example of a bottom gate thin film transistor, but the application is not limited thereto, and in other alternative embodiments, the thin film transistor 50 may also be a top gate thin film transistor. In addition, in fig. 15, the electrical connection between the common electrode block 70 (20) and the touch trace 30 is connected by an overline, but the present application is not limited thereto, and those skilled in the art may set the electrical connection according to the actual situation of the product. It should be noted that the liquid crystal touch display panel 100 provided in this embodiment may be applied to liquid crystal touch display panels such as TN mode, FFS mode, IPS mode, and the like. In fig. 15, only the touch display panel 100 is taken as an example of a liquid crystal touch display panel, and the common electrode 70 is located below the film layer where the pixel electrode 60 is located, but the application is not limited thereto, and those skilled in the art can select the type of touch display panel and set the specific structure and connection relationship of the touch display panel according to the actual situation. It should be noted that fig. 14 only illustrates an example in which one image frame includes one touch frame. In other alternative embodiments, one image frame may further include a plurality of touch frames, for example, fig. 16 is a timing chart of another touch display panel provided in the embodiment of the present invention, and referring to fig. 16, one image frame may further include two touch frames, so that the response speed of touch detection may be improved.

Fig. 17 is a schematic structural diagram of another touch display panel according to an embodiment of the invention, and fig. 18 is a timing chart of another touch display panel according to an embodiment of the invention. Alternatively, referring to fig. 17, the touch display panel 100 may include a plurality of display areas VA sequentially arranged along a pixel column direction; each display area VA may include a plurality of sub-pixel rows, wherein the number of sub-pixel rows included in each display area VA may be the same or different. Referring to fig. 18, each image frame may include a plurality of display driving phases P; the display driving stage P and the touch driving stage C are arranged at intervals.

In the display driving stage P, the display driving of the sub-pixels 40 in the display area VA includes: the sub-pixels 40 in the plurality of display areas VA are display-driven in time-sharing one-to-one correspondence in the plurality of display driving stages C.

In this embodiment, the display driving phases P and the touch driving phases C are arranged at intervals, and in each display driving phase P, a plurality of rows of sub-pixels in the display area VA are subjected to time-sharing display driving; in each touch driving stage C, a first touch scanning signal is applied to M touch electrodes of a touch area at the same time; the display driving stage P is inserted into the touch driving stage C, so that the display uniformity of the display panel can be improved.

Optionally, with continued reference to fig. 18, the duration of each touch driving stage C is the same, and the duration of each display driving stage P is the same, so that the display uniformity of the display panel may be further improved.

It should be noted that fig. 18 only illustrates an example in which one image frame includes two touch frames, but this is not a limitation of the present application.

Optionally, with continued reference to fig. 14, 16, and 18, each touch frame may further include a Noise detection phase Noise; the driving method may further include: noise detection is carried out through Noise in the Noise detection stage so as to obtain a touch detection Noise signal; applying first touch scanning signals to M touch electrodes of N touch areas in a time sharing mode to determine touch positions, wherein the method comprises the following steps of: and applying the first touch scanning signals to the M touch electrodes of the N touch areas in a time-sharing manner, and determining the touch position according to the touch detection signals and the touch detection noise signals fed back by the M touch electrodes of the N touch areas.

In this embodiment, noise detection is performed in the Noise detection stage, and then the touch position is determined according to the obtained touch detection Noise signal and the touch detection signal, so that the influence of background Noise on the touch detection signal is avoided, and the accuracy of touch position detection is improved.

Alternatively, with continued reference to fig. 16 and 18, each touch frame may include a Noise detection phase Noise. The accuracy of touch position detection can be further improved by performing noise detection in each touch frame.

Based on the same inventive concept, the embodiment of the invention also provides a driving circuit. The driving circuit provided by the embodiment of the invention is used for driving the touch display panel of the embodiment; the touch display panel comprises Q touch groups which are sequentially arranged along the pixel row direction or the pixel column direction; the touch control group comprises N touch control areas which are sequentially arranged along the arrangement direction of the touch control group; each touch area comprises M touch electrodes. Fig. 19 is a schematic diagram of a driving circuit according to an embodiment of the present invention. Referring to fig. 18, the driving circuit includes: the touch driving circuit 200 is configured to apply a first touch scanning signal to M touch electrodes in different touch areas AA in a time-sharing manner, and receive a touch detection signal fed back by the touch electrodes; the touch driving circuit 200 is further configured to determine that the L-th touch area is a touch area according to a touch detection signal fed back by the touch electrodes of the L-th touch area, and then apply first touch scanning signals to the M touch electrodes of the N touch areas in a time-sharing manner to determine a touch position; wherein, the M touch electrodes in each touch area AA apply the time overlap of the first touch scan signal; and applying a time overlap of the first touch scanning signal to M touch electrodes of the touch area with the same sequence number of different touch groups; q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N.

As shown in fig. 19, the touch display panel 100 includes 1 touch area group AA0 sequentially arranged along the pixel row direction; the touch area group AA0 comprises 4 touch areas AA which are sequentially arranged along the pixel row direction along the touch area group, and the 4 touch areas AA respectively comprise a first touch area AA1, a second touch area AA2, a third touch area AA3 and a fourth touch area AA4; each touch area AA includes 4 touch electrodes 20. Providing a first touch scanning signal to a plurality of touch electrodes in a first touch area AA1 at a first moment in one touch frame; providing a first touch scanning signal to a plurality of touch electrodes in the second touch area AA2 at a second moment; at a third moment, providing a first touch scanning signal to a plurality of touch electrodes in a third touch area AA 3; at the fourth moment, the first touch scanning signals are provided to the plurality of touch electrodes in the fourth touch area AA4, so as to complete scanning of all the touch electrodes in the touch display panel 100. When the capacitance change and difference occur in the touch detection signals fed back by the touch electrodes of the L-th touch area, such as the second touch area AA2, the second touch area AA2 can be roughly determined to be the touch area, at this time, the application of the first touch scanning signals to the touch electrodes of the L+1th to N-th touch areas, namely the three touch areas AA3 and the fourth touch area AA4, is stopped immediately, and the first touch scanning signals are applied to the touch electrodes of all the touch areas in a re-time sharing manner, so that the touch position is accurately determined.

Optionally, with continued reference to fig. 19, the touch driving circuit 200 may include m×q gate circuits 210; that is, the number of the gating circuits 210 may be the same as, for example, the product of the number of the touch electrodes 20 in each touch area AA and the number of the touch area groups AA 0; each of the gate circuits 210 may include N switch units 211, that is, the number of switch units 211 in each of the gate circuits 210 corresponds to the number of touch areas AA one by one, and first ends of the N switch units 211 are electrically connected, so that a first touch scan signal can be input at the same time; the second end of the ith switching unit 211 in each gating circuit 210 is electrically connected to the touch electrode 20 of the ith touch area AA; the jth touch electrode 20 of each touch area AA is electrically connected to the jth gate circuit 210; wherein i is less than or equal to N, j is less than or equal to M; the switch units 211 with the same sequence number in the different gating circuits 210 are sequentially turned on to apply the first touch scanning signals to the M touch electrodes 20 in the different touch areas AA in a time-sharing manner; when the touch area is the L-th touch area, the switch units 211 with the same sequence number in the different gating circuits 210 are controlled to be turned on sequentially, so as to apply the first touch scanning signal to the M touch electrodes 20 of at least part of the N touch areas AA in a time-sharing manner.

The switching unit 211 may include, for example, a transistor or a MOS transistor, which may implement an off and on function. A control terminal of each switching unit 211 is electrically connected to a gate control line SW, and a gate control signal transmitted through the gate control line SW controls on or off of the switching unit 211. For example, the control terminals of the switch units 211 with the same sequence number in the different gate circuits 210 may be electrically connected to the same gate control line SW, and the same gate control signal may be transmitted to control the on or off of the switch units 211 with the same sequence number in the different gate circuits 210 at the same time, so that the wiring may be reduced and the process steps may be simplified.

As shown in fig. 17, the touch display panel 100 may include 1 touch area group AA0, the touch area group AA0 may include 4 touch areas AA sequentially arranged along the touch area group along the pixel row direction, and the 4 touch areas AA may include a first touch area AA1, a second touch area AA2, a third touch area AA3, and a fourth touch area AA4, respectively; each touch area AA may include 4 touch electrodes 20; the touch driving circuit 200 includes 4 gate circuits 210; each of the gate circuits 210 may include 4 switching units 211,4 switching units 211 including a first switching unit 2111, a second switching unit 2112, a third switching unit 2113, and a fourth switching unit 2114, respectively; the gate control lines SW may include a first gate control line SW1, a second gate control line SW2, a third gate control line SW3, and a fourth gate control line SW4, respectively. The first gate control lines SW1 are electrically connected to the first switching units 2111 of the 4 gate circuits 210, respectively, the second gate control lines SW2 are electrically connected to the second switching units 2112 of the 4 gate circuits 210, respectively, the third gate control lines SW3 are electrically connected to the third switching units 2113 of the 4 gate circuits 210, respectively, and the fourth gate control lines SW4 are electrically connected to the fourth switching units 2114 of the 4 gate circuits 210, respectively. It can be understood that, in actual setting, the number of touch area groups AA0 in the touch display panel 100 is not limited to 1, the total number of touch areas AA (the sum of touch areas AA included in each touch area group AA 0) is also much greater than 4, the number of touch electrodes 20 in each touch area AA is also much greater than 4, the number of gate circuits 210 is also much greater than 4, and the number of switch units 211 in the gate circuits 210 is also not limited to 4, and the embodiment does not limit the number of touch area groups AA0, touch areas AA, touch electrodes 20 in the touch area AA, gate circuits 210, and switch units 211 in the gate circuits 210.

Specifically, at the first moment, the first gate control line SW1 outputs an active level, and the first switching units 2111 in the 4 gate circuits 210 are turned on to transmit the first touch scan signals transmitted by the first input terminal in1, the second input terminal in2, the third input terminal in3, and the fourth input terminal in4 to the four touch electrodes 20 in the first touch area AA 1; at a second moment, the second gate control line SW2 outputs an active level, and the second switching units 2112 in the 4 gate circuits 210 are turned on to transmit the first touch scan signals transmitted from the first input terminal in1, the second input terminal in2, the third input terminal in3, and the fourth input terminal in4 to the four touch electrodes 20 in the second touch area AA 2; the method comprises the steps of carrying out a first treatment on the surface of the At a third time, the third gate control line SW3 outputs an active level, and the third switching units 2113 of the 4 gate circuits 210 are turned on to transmit the first touch scan signals transmitted from the first input terminal in1, the second input terminal in2, the third input terminal in3, and the fourth input terminal in4 to the four touch electrodes 20 in the third touch area AA 3; the method comprises the steps of carrying out a first treatment on the surface of the At a fourth moment, the fourth gate control line SW4 outputs an active level, and the fourth switch unit 2114 in the 4 gate circuits 210 is turned on to transmit the first touch scan signals transmitted by the first input terminal in1, the second input terminal in2, the third input terminal in3, and the fourth input terminal in4 to the four touch electrodes 20 in the fourth touch area AA 4; scanning of all the touch electrodes 20 in the touch display panel is completed. When the L-th touch area is found to be a touch area for the first time, if the capacitance change occurs in the touch detection signal fed back by the touch electrode 20 in the second touch area AA2, the second touch area AA2 is determined to be a touch area, at this time, the application of the first touch signal to the l+1th to nth touch areas is stopped, that is, the application of the first touch signal to the touch electrodes in the third and fourth touch areas AA3 and AA4 is stopped, the first touch signal is applied to all the touch areas, that is, the 4 touch electrodes in the 4 touch areas in a re-time sharing manner, and finally, the processing and the operation are performed according to the touch detection signal fed back by the touch electrode 20 in the second touch area AA2, so as to accurately determine the touch position. Compared with the prior art, the embodiment of the invention shortens the time of T2', thereby shortening the time required for completing the determination of the touch position, further improving the problem of touch delay and improving the touch detection efficiency.

It should be noted that fig. 19 only shows a schematic structural diagram of a touch driving circuit, but the present application is not limited thereto, and those skilled in the art can set the touch driving circuit according to practical situations, as long as the time-sharing driving of different touch areas AA can be realized.

Fig. 20 is a schematic diagram of another driving circuit according to an embodiment of the present invention. Alternatively, referring to fig. 20, the driving circuit may further include a timing control circuit 300 and a display driving circuit 400. The timing control circuit 300 may be configured to provide a frame synchronization signal for each image frame, where the frame synchronization signal includes at least one display driving stage and a plurality of touch driving stages, and K is a positive integer greater than or equal to 1. The display driving circuit 400 may be configured to output a display driving signal for screen display in a display driving stage. The touch driving circuit 200 may be configured to apply a first touch scanning signal to M touch electrodes of different touch areas in a time-sharing manner in a touch driving stage; the touch driving circuit 200 may be further configured to apply the first touch scanning signal to the M touch electrodes in all the touch areas in the touch driving stage, so as to realize time-sharing driving of touch and display.

Based on the same inventive concept, the embodiment of the invention also provides a touch display device. The touch display device provided by the embodiment of the invention comprises the touch display panel and the driving circuit in the embodiment, so that the touch display device provided by the embodiment of the invention has the corresponding beneficial effects in the embodiment, and the details are not repeated here.

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. Fig. 21 is a schematic structural diagram of a touch display device according to an embodiment of the invention, and as shown in fig. 21, a touch display device 500 includes a touch display panel 600 and a driving circuit 700 in the above embodiment. The touch chip and the display chip may be integrated into the same chip, and the touch driving circuit may be integrated inside the chip, or the touch driving circuit is disposed in the touch display panel 600, which is not limited in this embodiment.

Alternatively, the touch display panel 600 may include a liquid crystal display panel or an organic light emitting display panel.

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 driving method of the touch display panel is characterized in that the touch display panel comprises Q touch groups which are sequentially arranged along the pixel row direction or the pixel column direction; the touch area group comprises N touch areas which are sequentially arranged along the arrangement direction of the touch area group; each touch area comprises M touch electrodes;

the driving method includes:

wherein Q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N;

when the touch areas are respectively located in at least two different touch areas, the at least two different touch areas comprise an L-th touch area and a Z-th touch area, wherein the Z-th touch area is one of the L+1-th touch area to the N-th touch area.

2. The method according to claim 1, wherein when L < N, before the first touch scan signal is applied to the M touch electrodes of the N touch areas in a time-sharing manner, further comprising:

and applying first touch scanning signals to M touch electrodes of partial touch areas from the L+1th touch area to the N touch area in a time sharing mode.

3. The method according to claim 1, wherein when L < N, before the first touch scan signal is applied to the M touch electrodes of the N touch areas in a time-sharing manner, further comprising:

applying second touch scanning signals to M touch electrodes in the L+1th touch area to the N touch area in a time-sharing mode;

the duration of applying the second touch scanning signal is less than the duration of applying the first touch scanning signal.

4. The method for driving a touch display panel according to claim 1, wherein the touch display panel comprises at least one display area sequentially arranged along a pixel column direction;

each image frame comprises at least one display driving stage and a plurality of touch driving stages; each image frame comprises K touch frames, wherein K is a positive integer greater than or equal to 1; each touch frame comprises a plurality of touch driving stages;

Applying first touch scanning signals to M touch electrodes of different touch areas in a time sharing mode, wherein the first touch scanning signals comprise:

applying first touch scanning signals to M touch electrodes of different touch areas in a one-to-one corresponding time-sharing manner in a plurality of touch driving stages;

applying the first touch scanning signal to the M touch electrodes of the N touch areas in a time-sharing manner, including:

applying a first touch scanning signal to M touch electrodes of N touch areas in a time-sharing mode corresponding to the touch driving stages one by one;

the driving method further includes:

and in the display driving stage, performing display driving on the sub-pixels in the display area.

5. The method according to claim 4, wherein the touch display panel includes a plurality of display areas sequentially arranged along a pixel column direction; each of the image frames comprising a plurality of display driving phases; the display driving stage and the touch driving stage are arranged at intervals;

in the display driving stage, performing display driving on the sub-pixels in the display area, including:

and performing display driving on the sub-pixels in the display areas in a time-sharing mode corresponding to the display driving phases one by one.

6. The method according to claim 5, wherein the duration of each of the touch driving stages is the same, and the duration of each of the display driving stages is the same.

7. The method according to claim 5, wherein each of the touch frames further comprises a noise detection stage;

the driving method further includes:

performing noise detection through the noise detection stage to obtain a touch detection noise signal;

applying the first touch scanning signal to the M touch electrodes of the N touch areas in a time-sharing manner to determine a touch position, including:

and applying the first touch scanning signals to the M touch electrodes of the N touch areas in a time-sharing manner, and determining touch positions according to touch detection signals fed back by the M touch electrodes of the N touch areas and the touch detection noise signals.

8. The driving circuit is characterized by being used for driving the touch display panel; the touch display panel comprises Q touch groups which are sequentially arranged along the pixel row direction or the pixel column direction; the touch area group comprises N touch areas which are sequentially arranged along the arrangement direction of the touch area group; each touch area comprises M touch electrodes;

wherein, M of the touch electrodes in each touch area apply a time overlap of a first touch scanning signal; and applying a time overlap of a first touch scanning signal to the M touch electrodes of the touch areas with the same sequence numbers of different touch groups;

q, L, M and N are positive integers greater than or equal to 1; l is less than or equal to N;

9. The driving circuit of claim 8, wherein the touch driving circuit comprises M x Q gate circuits; each gating circuit comprises N switch units, and first ends of the N switch units are electrically connected;

The second end of the ith switch unit in each gating circuit is electrically connected with the touch electrode of the ith touch area; the jth touch electrode of each touch area is electrically connected with the jth gating circuit; wherein i is less than or equal to N, j is less than or equal to M;

the switch units with the same sequence numbers in different gating circuits are sequentially conducted so as to apply first touch scanning signals to M touch electrodes in different touch areas in a time-sharing mode;

when the touch area is the L-th touch area, the switch units with the same sequence numbers in different gating circuits are sequentially conducted so as to apply first touch scanning signals to M touch electrodes of the touch areas in the N touch areas in a time-sharing mode.

10. The driver circuit according to claim 9, further comprising a timing control circuit and a display driver circuit;

the timing control circuit is used for providing a frame synchronization signal in each image frame, wherein the frame synchronization signal comprises at least one display driving stage and a plurality of touch driving stages, and K is a positive integer greater than or equal to 1;

the display driving circuit is used for outputting a display driving signal to display pictures in the display driving stage;

The touch driving circuit is used for applying first touch scanning signals to M touch electrodes of different touch areas in a time-sharing mode in the touch driving stage;

the touch driving circuit is further configured to apply a first touch scanning signal to M touch electrodes in the N touch areas in the touch driving stage.

11. A touch display device comprising a touch display panel and the drive circuit of any one of claims 8-10.

12. The touch display device of claim 11, wherein the touch display panel comprises a liquid crystal display panel or an organic light emitting display panel.