CN112462973B

CN112462973B - Driving method and driving circuit of touch display panel and touch display device

Info

Publication number: CN112462973B
Application number: CN202011380892.4A
Authority: CN
Inventors: 邹宗骏; 张传煌; 孙莹; 许育民
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2023-12-05
Anticipated expiration: 2040-11-30
Also published as: CN112462973A

Abstract

The invention discloses a driving method and a driving circuit of a touch display panel and a touch display device. The driving method comprises the following steps: applying a touch scanning signal to the touch electrode in the touch area in the touch driving stage; display driving is carried out on the touch display panel through a display driving stage; the touch control device comprises a plurality of touch control driving stages of each touch control frame and N touch control areas, wherein the touch control driving stages of each touch control frame correspond to the N touch control areas one by one; the time for applying the touch scanning signals to the touch electrodes in different touch areas is different; at least one touch driving stage of the plurality of touch driving stages of each touch frame is located before the display driving stage, and the sum of the time durations of the display driving stages between adjacent touch driving stages in each touch frame is smaller than the sum of the time durations of the display driving stages between adjacent touch driving stages in each touch frame when the touch driving stages and the display driving stages are alternately distributed and the time durations of the display driving stages between adjacent touch driving stages are the same.

Description

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

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a driving method and a driving circuit of a touch display panel and the touch display panel.

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 about 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 are used for solving the problem of touch delay and realizing 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 each image frame includes at least one display driving stage and a plurality of touch driving stages; each image frame comprises at least one touch frame; each touch frame comprises a plurality of touch driving stages;

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 Q and M are positive integers greater than or equal to 1; n is a positive integer greater than 1;

the driving method includes:

applying a touch scanning signal to the touch electrode in the touch area in a touch driving stage;

performing display driving on the touch display panel through a display driving stage;

the touch driving stages of each touch frame are in one-to-one correspondence with the N touch areas; the time for applying the touch scanning signals to the touch electrodes in different touch areas is different; the M touch electrodes in each touch area apply time overlapping of touch scanning signals; and applying a time overlap of touch scanning signals to M touch electrodes of the touch areas with the same sequence numbers of different touch groups;

at least one touch driving stage of a plurality of touch driving stages of each touch frame is positioned before the display driving stage, and the sum of the duration of the display driving stages between adjacent touch driving stages in each touch frame is a first time period;

When the touch control driving phases and the display driving phases are alternately distributed and the duration of the display driving phases between the adjacent touch control driving phases is the same, the sum of the duration of the display driving phases between the adjacent touch control driving phases in each touch control frame is a second time period;

the first time period is less than the second time period.

In a second aspect, an embodiment of the present invention further 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; wherein Q and M are positive integers greater than or equal to 1; n is a positive integer greater than 1;

the driving circuit includes:

a timing control circuit for providing a frame synchronization signal at each image frame, the frame synchronization signal including at least one display driving stage and a plurality of touch driving stages; each image frame comprises at least one touch frame; each touch frame comprises a plurality of touch driving stages;

the display driving circuit is used for performing display driving on the touch display panel in a display driving stage;

The touch driving circuit is used for applying a touch scanning signal to the touch electrode in the touch area in a touch driving stage;

the touch driving stages of each touch frame are in one-to-one correspondence with the N touch areas; the time for applying the touch scanning signals to the touch electrodes in different touch areas is different; time overlapping of touch scanning signals applied by the M touch electrodes in each touch area; and applying a time overlap of touch scanning signals to M touch electrodes of the touch areas with the same sequence numbers of different touch groups;

the first time period is less than the second time period.

In a third aspect, an embodiment of the present invention further provides a touch display device, where the touch display device includes 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 a plurality of touch areas, touch scanning signals are provided for touch electrodes of different touch areas in a time-sharing mode, and the number of signal pins is reduced. In addition, when a touch scanning signal is required to be applied to the touch electrodes in the touch area and a touch display panel is required to be displayed and driven, the touch scanning signal is firstly applied to the touch electrodes of at least one touch area in the touch area group, and then the touch scanning signal is applied to the touch electrodes of other touch areas and the display is driven to be performed on the sub-pixels of the display area, the sum of the time durations of the display driving stages between adjacent touch driving stages in each touch frame is smaller than the sum of the time durations of the display driving stages between adjacent touch driving stages in each touch frame in the prior art (the touch driving stages and the display driving stages are alternately distributed, and the time durations of the display driving stages between adjacent touch driving stages are the same). Thus, when one of the N touch areas is touched by a finger after the touch electrode in the touch area is scanned, a time period of applying a touch scanning signal to the touch electrode in the other touch areas (the touch areas except the touch area in the N touch areas) in the touch frame is smaller than a time period of completing the scanning of the touch electrode in the touch area except the touch area in the N touch areas in the prior art. Compared with the prior art, the time of T1' is shortened, so that the problem of touch delay is solved, 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.

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 schematic structural diagram of another touch display panel according to an embodiment of the invention;

fig. 6 is a comparison diagram of a touch display panel timing sequence according to the present embodiment of the present invention and a touch display panel timing sequence according to the prior art;

fig. 7 is a timing chart of a touch display panel according to an embodiment of the invention;

fig. 8 is a schematic structural diagram of another touch display panel according to an embodiment of the invention;

fig. 9 is a diagram showing a comparison between a touch display panel timing sequence according to another embodiment of the present invention and a touch display panel timing sequence according to the prior art;

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

FIG. 11 is a diagram showing a touch display panel timing sequence according to another embodiment of the present invention compared with a prior art touch display panel timing sequence;

Fig. 12 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. 13 is a timing chart of another touch display panel according to an embodiment of the invention;

fig. 14 is a schematic structural diagram of a driving circuit according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a touch driving circuit according to an embodiment of the present invention;

fig. 16 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, fig. 2 is a timing chart of a touch display panel in the prior art, as shown in fig. 1 and 2, a conventional touch display panel 100' includes a plurality of touch areas AA ' sequentially arranged along a pixel column direction and a plurality of display areas VA ' sequentially arranged along the pixel column direction, a plurality of touch electrodes 10' are disposed in the touch areas AA ', each of the display areas VA ' includes a plurality of rows of sub-pixel rows (not shown in the drawing), and the number of sub-pixel rows included in each of the display areas VA ' is the same. Each image frame comprises a plurality of display driving phases P 'and a plurality of touch driving phases C'; the display driving stage P 'and the touch driving stage C' are arranged at intervals; the duration of the display driving phase P 'between two adjacent touch driving phases C' is the same; in the display driving stage P ', display driving is performed on the sub-pixels in the display area VA ', and in the touch driving stage C ', touch scanning signals are simultaneously applied to the touch electrodes 10' in the same touch area AA '. 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'. In one touch frame T0', scanning of all the touch electrodes 10' in the four touch areas AA 'of the touch display panel 100' is completed. The plurality of display areas VA 'include a first display area VA1', a second display area VA2', a third display area VA3', a fourth display area VA4', and a fifth display area VA5'. Specifically, at a first moment, display driving is performed on the sub-pixels in the first display area VA 1'; at the second moment, providing touch scanning signals to the plurality of touch electrodes 10 'in the first touch area AA 1'; at a third moment, performing display driving on the sub-pixels in the second display area VA 2'; at the fourth moment, providing touch scanning signals to the plurality of touch electrodes 10 'in the second touch area AA 2'; at a fifth moment, performing display driving on the sub-pixels in the third display area VA 3'; at the sixth moment, providing touch scanning signals to the plurality of touch electrodes 10 'in the third touch area AA 3'; at the seventh moment, display driving is carried out on the sub-pixels in the fourth display area VA 4'; at the eighth moment, providing touch scanning signals to the plurality of touch electrodes 10 'in the fourth touch area AA 4'; at the ninth timing, display driving is performed on the subpixels in the fifth display area VA5'. With continued reference to fig. 2, when the finger touches the first touch area AA1 'after completing the scanning of the touch electrode 10' in the first touch area AA1', that is, when touching the touch electrode 10' in the first touch area AA1', the touch driving circuit does not detect the touch, and needs to wait until the second touch frame T0' to detect the touch, the time T1 'is missed, where T1' includes, for example, time for time-sharing scanning the touch electrode 10 'in the second touch area AA2', time-sharing scanning the touch electrode 10 'in the third touch area AA3', and time-sharing displaying the sub-pixels in the second display area VA2', the sub-pixels in the third display area VA3', the sub-pixels in the fourth display area VA4', and the sub-pixels in the fifth display area VA5'. Then, after scanning all the touch electrodes 10 'in the touch display panel 100' and displaying and driving all the sub-pixels in the display area VA 'are completed in the second touch frame T0', the touch electrodes 10 'of the first touch area AA1' are found when the finger touches the touch electrodes, that is, the time T2 'is needed at this time, and the time T2' is also 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' finishes scanning all the touch electrodes 10' in the touch display panel 100' and performing display driving on all the sub-pixels in the display area VA ', the touch position data is collected, and at this time, the time of T3' is required, and the time of 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 described above, the embodiments of the present invention provide a driving method of a touch display panel, where each image frame includes at least one display driving stage and a plurality of touch driving stages; each image frame comprises at least one touch frame; each touch frame comprises a plurality of touch driving stages; 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; wherein Q and M are positive integers greater than or equal to 1; n is a positive integer greater than 1; the driving method comprises the following steps: applying a touch scanning signal to the touch electrode in the touch area in the touch driving stage; display driving is carried out on the touch display panel through a display driving stage; the touch control device comprises a plurality of touch control driving stages of each touch control frame and N touch control areas, wherein the touch control driving stages of each touch control frame correspond to the N touch control areas one by one; the time for applying the touch scanning signals to the touch electrodes in different touch areas is different; the M touch electrodes in each touch area apply time overlapping of touch scanning signals; and applying a time overlap of touch scanning signals to M touch electrodes of the touch areas with the same sequence numbers of different touch groups; a first touch driving stage of the plurality of touch driving stages of each touch frame is positioned before a display driving stage, and the sum of the duration of the display driving stages between adjacent touch driving stages in each touch frame is a first time period; when the touch control driving phases and the display driving phases are alternately distributed and the duration of the display driving phases between the adjacent touch control driving phases is the same, the sum of the duration of the display driving phases between the adjacent touch control driving phases in each touch control frame is a second time period; the first time period is less than the second time period.

By adopting the technical scheme, the touch display panel is divided into Q touch groups, each touch group comprises a plurality of touch areas, touch scanning signals are provided for touch electrodes in different touch areas in a time-sharing manner, and the number of signal pins is reduced; in addition, when a touch scanning signal is required to be applied to the touch electrodes in the touch area and a touch display panel is required to be displayed and driven, the touch scanning signal is firstly applied to the touch electrodes of at least one touch area in the touch area group, and then the touch scanning signal is applied to the touch electrodes of other touch areas and the display is driven to be performed on the sub-pixels of the display area, the sum of the time durations of the display driving stages between adjacent touch driving stages in each touch frame is smaller than the sum of the time durations of the display driving stages between adjacent touch driving stages in each touch frame in the prior art (the touch driving stages and the display driving stages are alternately distributed, and the time durations of the display driving stages between adjacent touch driving stages are the same). Thus, when one of the N touch areas is touched by a finger after the touch electrode in the touch area is scanned, a time period of applying a touch scanning signal to the touch electrode in the other touch areas (the touch areas except the touch area in the N touch areas) in the touch frame is smaller than a time period of completing the scanning of the touch electrode in the touch area except the touch area in the N touch areas in the prior art. Compared with the prior art, the time of T1' is shortened, so that the problem of touch delay is solved, 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 application, and the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making any inventive effort are intended to fall within the scope of the present application.

Fig. 3 is a schematic structural diagram of a touch display panel according to an embodiment of the present application, and fig. 4 is a flowchart of a driving method of a touch display panel according to an embodiment of the present application, where, as shown in fig. 3, the touch display panel 100 includes Q touch 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 AA0; each touch area AA includes M touch electrodes 10; wherein Q and M are positive integers greater than or equal to 1; n is a positive integer greater than 1. Fig. 3 only shows that the touch display panel 100 includes 2 touch area groups AA0 sequentially arranged along the pixel row direction; the touch area group AA0 includes 4 touch areas AA sequentially arranged along the arrangement direction of the touch area group AA0, which is not a limitation of the present application.

Each image frame comprises at least one display driving stage and a plurality of touch driving stages; each image frame comprises at least one touch frame; each touch frame includes a plurality of touch driving phases. When one image frame includes a plurality of touch frames, for example, when one image frame includes two touch frames, the response speed of touch detection can be improved.

As shown in fig. 4, the driving method of the touch display panel provided in the embodiment of the invention includes:

s110, applying a touch scanning signal to a touch electrode in a touch area in a touch driving stage; the touch control device comprises a plurality of touch control driving stages of each touch control frame and N touch control areas, wherein the touch control driving stages of each touch control frame correspond to the N touch control areas one by one; the time for applying the touch scanning signals to the touch electrodes in different touch areas is different; the M touch electrodes in each touch area apply time overlapping of touch scanning signals; and applying a time overlap of touch scan signals to the M touch electrodes of the touch area of the same arrangement sequence number of the different touch groups.

Since the number of touch driving stages is plural and the number of touch areas AA is plural, the number of signal pins can be reduced by applying touch scanning signals to the M touch electrodes 10 of the N touch areas AA in a time-sharing manner corresponding to the touch driving stages of each touch frame one by one, that is, providing touch scanning signals to the touch electrodes 10 of different touch areas AA in a time-sharing manner.

Wherein, the time overlapping of the touch scan signals applied by all the touch electrodes 10 located in the same touch area AA. For example, with continued reference to fig. 3, the touch display panel 100 includes a plurality of 2 touch area groups AA0 sequentially arranged along the pixel row direction, and the 2 touch area groups AA0 include a first touch area group AA01 and a second touch area group AA02, respectively; 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 comprises a plurality of touch electrodes 10; the time overlap of the touch scan signals applied by all the touch electrodes 10 in the first touch area AA1, the time overlap of the touch scan signals applied by all the touch electrodes 10 in the second touch area AA2, the time overlap of the touch scan signals applied by all the touch electrodes 10 in the third touch area AA3, and the time overlap of the touch scan signals applied by all the touch electrodes 10 in the fourth touch area AA 4.

Wherein, the time overlapping of touch scanning signals is applied to the M touch electrodes 10 of the touch area AA with the same sequence number of the different touch areas AA 0. For example, the time when all the touch electrodes 10 within the first touch area AA1 in the first touch area AA01 apply the touch scan signal and the time when all the touch electrodes 10 within the first touch area AA1 in the second touch area AA02 apply the touch scan signal overlap, the time when all the touch electrodes 10 within the second touch area AA2 in the first touch area AA01 apply the touch scan signal and the time when all the touch electrodes 10 within the second touch area AA2 in the second touch area AA02 apply the touch scan signal overlap, and the time when all the touch electrodes 10 within the third touch area AA3 in the first touch area AA01 apply the touch scan signal and the time when all the touch electrodes 10 within the third touch area AA3 in the second touch area AA02 apply the touch scan signal overlap, and the time when all the touch electrodes 10 within the fourth touch area AA4 in the first touch area AA01 apply the touch area AA4 overlap.

The plurality of touch driving stages includes 4 touch driving stages, wherein the 4 touch driving stages include a first touch driving stage, a second touch driving stage, a third touch driving stage, and a fourth touch driving stage. In the first touch driving stage, providing touch scanning signals to a plurality of touch electrodes 10 in a first touch area AA1 in a first touch area AA01 and a second touch area AA 02; in the second touch driving stage, providing touch scanning signals to a plurality of touch electrodes 10 in a second touch area AA2 in the first touch area group AA01 and the second touch area group AA 02; in the third touch driving stage, providing touch scanning signals to a plurality of touch electrodes 10 in a third touch area AA3 in the first touch area group AA01 and the second touch area group AA 02; in the fourth touch driving stage, touch scanning signals are provided to the plurality of touch electrodes 10 in the fourth touch area AA4 in the first touch area group AA01 and the second touch area group AA02, so as to complete scanning of all the touch electrodes 10 in the touch display panel 100.

In the embodiment, the touch electrode 10 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 10 is a self-capacitance touch electrode, the working process is as follows: each touch electrode 10 corresponds to a defined coordinate position, and the touch electrodes 10 each form a capacitance with ground. When a finger touches the touch display panel, the capacitance of the finger is superimposed on the touch electrode touched by the finger, so that the capacitance to ground of the touch electrode touched by the finger is changed. Since the change of the signal of each touch electrode 10 reflects the change of the capacitance of the touch electrode to the ground, by detecting the touch detection signals fed back by the M touch electrodes 10 of each touch area AA, it is possible to determine which specific touch electrode 10 has the signal changed, and then according to the coordinate values corresponding to the touch electrode 10 with the signal changed, it is possible to determine the touch position of the finger and the touch area AA touched. If the touch electrode 10 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 are overlapped, and a capacitor is formed at the crossing position of the two groups of electrodes. When a finger touches the touch display panel 100, coupling between two electrodes near a touch point is affected, thereby changing capacitance between the two electrodes. When the mutual capacitance is detected, by sequentially sending excitation signals to the touch driving electrodes, all the touch detection electrodes simultaneously receive signals, so that the capacitance value of the junction of all the touch driving electrodes and the touch detection electrodes, namely the capacitance value of the two-dimensional plane of the whole touch display panel 100, 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 AA of the touch are determined.

Alternatively, when the touch electrode 10 is a mutual capacitive touch electrode, the touch driving electrode and the touch detecting electrode in the mutual capacitive touch electrode may be disposed in the same layer in an insulating manner, or may be disposed in different layers. The present embodiment is not particularly limited.

Optionally, the time for applying the touch scanning signal to the M touch electrodes 10 in each touch area AA is the same; and the time for applying the touch scanning signals to the M touch electrodes 10 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; and the same control signal can control the touch driving circuit to simultaneously provide touch scanning signals to all the touch electrodes 10 in the touch area AA with the same sequence number and different touch groups, so that wiring is reduced, process steps are simplified, and the preparation efficiency of the touch display panel 100 is improved.

S120, performing display driving on the touch display panel through a display driving stage; at least one touch driving stage of the plurality of touch driving stages of each touch frame is positioned before the display driving stage, and the sum of the duration of the display driving stages between adjacent touch driving stages in each touch frame is a first time period; when the touch control driving phases and the display driving phases are alternately distributed and the duration of the display driving phases between the adjacent touch control driving phases is the same, the sum of the duration of the display driving phases between the adjacent touch control driving phases in each touch control frame is a second time period; the first time period is less than the second time period.

The touch display panel 100 further includes a plurality of scan lines extending along the pixel row direction and at least one group of cascaded shift registers (not shown), where one scan line is electrically connected to one row of sub-pixels. The driving signal output ends of the shift registers are electrically connected with the scanning lines in a one-to-one correspondence manner, the shift registers at all levels sequentially output driving signals to the scanning lines in the touch display panel 100 so as to display and drive the sub-pixels in the touch display panel 100 row by row, and the touch display panel realizes a display function.

For example, when the touch scan signal is applied to the touch electrode 10 in the touch area AA and the touch display panel 100 is displayed and driven in a time-sharing manner, the touch scan signal is applied to the touch electrode 10 in the first touch area AA1 in the touch area group AA0, and then the touch scan signal is applied to the touch electrode 10 in the second, third and fourth touch areas AA2, AA3 and AA4, and the sub-pixels of the display area are displayed and driven, the sum of the durations of the display driving phases between the adjacent touch driving phases in each touch frame (i.e., the display driving phase between the touch driving phase when driving the first touch driving area AA1 and the display driving phase when driving the second touch driving area AA2 is added, the display driving phase between the touch driving phase when driving the third touch driving area AA3 and the display driving phase when driving the third touch driving area AA3 are added, and the display driving phase when driving the fourth touch driving area AA4 are alternately distributed in the prior art, and the sum of the time durations of the display driving phases between the adjacent touch driving phases (i.e., the sum of the display driving phase between the touch driving phase when driving the first touch driving area AA1 'and the touch driving phase when driving the second touch driving area AA 2') plus the display driving phase between the touch driving phase when driving the second touch driving area AA2 'and the touch driving phase when driving the third touch driving area AA 3') plus the display driving phase between the touch driving phase when driving the third touch driving area AA3 ') and the display driving phase when driving the fourth touch driving area AA 4'). In this way, when the first touch area AA1 of the 4 touch areas AA is touched by a finger after the touch electrode 10 in the first touch area AA1 is scanned, the sum of the time period of applying the touch scanning signal to the touch electrode 10 in the second touch area AA2, the time period of applying the touch scanning signal to the touch electrode 10 in the third touch area AA3, the time period of applying the touch scanning signal to the touch electrode 10 in the fourth touch area AA4, and the time period of displaying the touch display panel 100 through the display driving phase is smaller than the sum of the time period of displaying the VA pixel in the first touch area AA1 'of the 4 touch areas AA' and the time period of displaying the VA pixel in the second sub-area VA pixel in the second touch area AA2 'and the VA pixel in the fourth touch area AA4' when the touch driving phase is completed after the touch electrode 10 'in the first touch area AA1' is scanned. Compared with the prior art, the time of T1' is shortened, the problem of touch delay can be solved, and the effect of improving the touch detection performance is realized.

In practical applications, there are various ways to make the first period of time smaller than the second period of time, and the present application will be described in detail with reference to typical examples. The following does not limit the application.

Optionally, the image frame comprises a plurality of display driving phases; the touch display panel comprises a plurality of display areas which are sequentially arranged along the direction of the pixel columns; the display driving stage and the touch driving stage are sequentially and alternately distributed; when the sum of the duration of the display driving phases between the adjacent touch driving phases in each touch frame is the first time period, the duration of the display driving phases between the adjacent touch driving phases in each touch frame is the same.

Fig. 5 is a schematic structural diagram of another touch display panel according to an embodiment of the present application, where, as shown in fig. 5, the touch display panel 100 includes 4 display areas VA sequentially arranged along a pixel column direction, and the 4 display areas VA include a first display area VA1, a second display area VA2, a third display area VA3, and a fourth display area VA4; fig. 6 is a comparison diagram of a touch display panel timing sequence according to the present embodiment of the present application and a touch display panel timing sequence according to the prior art, as shown in fig. 6, an image frame includes 4 display driving phases P and 4 touch driving phases C. The 4 display driving stages P include a first display driving stage P1, a second display driving stage P2, a third display driving stage P3, and a fourth display driving stage P4. The sub-pixels of the first display area VA1 are scanned line by line in the first display driving stage P1, the sub-pixels of the second display area VA2 are scanned line by line in the second display driving stage P2, the sub-pixels of the third display area VA3 are scanned line by line in the third display driving stage P3, and the sub-pixels of the fourth display area VA4 are scanned line by line in the fourth display driving stage P4, wherein the duration of the first display driving stage P1 is equal to the duration of the second display driving stage P2 is equal to the duration of the third display driving stage P3, that is, the first duration is the same, so that the uniformity of display can be improved. The 4 touch driving stages C include a first touch driving stage C1, a second touch driving stage C2, a third touch driving stage C3, and a fourth touch driving stage C4. In the first touch driving stage C1, a touch scanning signal is applied to the touch electrode 10 in the first touch area AA1, in the second touch driving stage C2, a touch scanning signal is applied to the touch electrode 10 in the second touch area AA2, in the third touch driving stage C3, a touch scanning signal is applied to the touch electrode 10 in the third touch area AA3, and in the fourth touch driving stage C4, a touch scanning signal is applied to the touch electrode 10 in the fourth touch area AA4, wherein the display driving stage P and the touch driving stage C are alternately distributed in sequence.

When a finger touches the first touch area AA1, after the touch electrode 10 in the first touch area AA1 is scanned, that is, when the touch electrode 10 in the first touch area AA1 is touched, the touch driving circuit cannot detect the touch and needs to wait for the second touch frame T0 to detect the touch, and then the time T1 is missed, wherein T1 includes time for time-sharing scanning the touch electrode in the second touch area AA2, the touch electrode in the third touch area AA3, and the touch electrode in the fourth touch area AA4, that is, c2+c3+c4, which is the same as the time for time-sharing scanning the touch electrode 10 'in the second touch area AA2', the touch electrode 10 'in the third touch area AA3', and the touch electrode 10 'in the fourth touch area AA4' in the prior art; at this time, the duration of the first display driving stage P1, the duration of the second display driving stage P2, and the duration of the third display driving stage P3 may be respectively less than the duration of the display driving stage P 'in the prior art, so that the first time period is less than the second time period, that is, compared with the prior art, the time of T1' is reduced. After the scanning of all the touch electrodes 10 in the touch display panel 100 is completed in the second touch frame T0, the finger touching the first touch area AA1 (the L-th touch area) is found, i.e. the time T2 is needed, and the time T2 is also the time of one touch frame T0, however, according to the principle of touch calculation accuracy, T2 is discarded. In the third touch frame T0, the scanning of all the touch electrodes 10 in the touch display panel 100 needs to be continuously completed, and touch position data is collected. Then, a phase T4 is entered, wherein the phase T4 is a data processing and touch position determining phase, and the time of the phase T4 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 determining the touch position is t1+t2+t3+t4=t1+2t0+t4, where T1 is smaller than T1 'and T0' in the prior art, and T4 is the same as T0 'in the prior art, compared with the time required for completing the whole process of determining the touch position in the prior art is T1' +2t0'+t4', the problem of touch delay is improved, 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.

It should be noted that fig. 5 and fig. 6 only illustrate examples when the duration of the first display driving stage P1, the duration of the second display driving stage P2, and the duration of the third display driving stage P3 are the same, but the present application is not limited thereto, as long as the first period of time can be smaller than the second period of time. For example, referring to fig. 7, the first time period of the display driving phase P between adjacent touch driving phases C within each touch frame T0 is at least partially different, for example, the time period of the first display driving phase P1, the time period of the second display driving phase P2, and the time period of the third display driving phase P3 sequentially increase, but still keep the first time period smaller than the second time period.

Optionally, at least part of adjacent touch driving stages are not provided with display driving stages therebetween.

Fig. 8 is a schematic structural diagram of another touch display panel according to an embodiment of the present application, where, as shown in fig. 8, the touch display panel 100 includes 3 display areas VA sequentially arranged along a pixel column direction, and the 3 display areas VA include a first display area VA1, a second display area VA2, and a third display area VA3; fig. 6 is a comparison diagram of a touch display panel timing sequence according to another embodiment of the present application and a touch display panel timing sequence according to the prior art, as shown in fig. 9, an image frame includes 3 display driving phases P and 4 touch driving phases C. The 4 display driving stages P include a first display driving stage P1, a second display driving stage P2, and a third display driving stage P3. The sub-pixels of the first display area VA1 are scanned line by line in the first display driving stage P1, the sub-pixels of the second display area VA2 are scanned line by line in the second display driving stage P2, and the sub-pixels of the third display area VA3 are scanned line by line in the third display driving stage P3. The 4 touch driving stages C include a first touch driving stage C1, a second touch driving stage C2, a third touch driving stage C3, and a fourth touch driving stage C4. Applying a touch scanning signal to the touch electrode 10 in the first touch area AA1 in the first touch driving stage C1, applying a touch scanning signal to the touch electrode 10 in the second touch area AA2 in the second touch driving stage C2, applying a touch scanning signal to the touch electrode 10 in the third touch area AA3 in the third touch driving stage C3, and applying a touch scanning signal to the touch electrode 10 in the fourth touch area AA4 in the fourth touch driving stage C4, wherein a display driving stage P is not arranged between the first touch driving stage C1 and the second touch driving stage C2; the second touch driving stage C2, the first display driving stage P1, the third touch driving stage C3, the second display driving stage P2, the fourth touch driving stage C4 and the third display driving stage P3 are alternately distributed.

When a finger touches the first touch area AA1, after the touch electrode 10 in the first touch area AA1 is scanned, that is, when the touch electrode 10 in the first touch area AA1 is touched, the touch driving circuit cannot detect the touch and needs to wait for the second touch frame T0 to detect the touch, and then the time T1 is missed, wherein T1 includes time for time-sharing scanning the touch electrode in the second touch area AA2, the touch electrode in the third touch area AA3, and the touch electrode in the fourth touch area AA4, that is, c2+c3+c4, which is the same as the time for time-sharing scanning the touch electrode 10 'in the second touch area AA2', the touch electrode 10 'in the third touch area AA3', and the touch electrode 10 'in the fourth touch area AA4' in the prior art; at this time, since no display driving stage is disposed between the first touch driving stage C1 and the second touch driving stage C2, the first time period is smaller than the second time period in the prior art, that is, compared with the prior art, the time of T1' is reduced. After the scanning of all the touch electrodes 10 in the touch display panel 100 is completed in the second touch frame T0, the finger touching the first touch area AA1 (the L-th touch area) is found, i.e. the time T2 is needed, and the time T2 is also the time of one touch frame T0, however, according to the principle of touch calculation accuracy, T2 is discarded. In the third touch frame T0, the scanning of all the touch electrodes 10 in the touch display panel 100 needs to be continuously completed, and touch position data is collected. Then, a phase T4 is entered, wherein the phase T4 is a data processing and touch position determining phase, and the time of the phase T4 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 determining the touch position is t1+t2+t3+t4=t1+2t0+t4, where T1 is smaller than T1 'and T0' in the prior art, and T4 is the same as T0 'in the prior art, compared with the time required for completing the whole process of determining the touch position in the prior art is T1' +2t0'+t4', the problem of touch delay is improved, 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.

It should be noted that, fig. 9 only illustrates an example in which no display driving stage is disposed between the first touch driving stage C1 and the second touch driving stage C2, but the present application is not limited thereto, and those skilled in the art may set the display driving stage according to actual situations. In other alternative embodiments, a display driving stage may not be disposed between the second touch driving stage C2 and the third touch driving stage C3; or, no display driving stage is arranged between the third touch driving stage C3 and the fourth touch driving stage C4; or, no display driving stage is arranged between the first touch driving stage C1 and the second touch driving stage C2, and meanwhile, no display driving stage is arranged between the second touch driving stage C2 and the third touch driving stage C3; or, no display driving stage is arranged between the first touch driving stage C1 and the second touch driving stage C2, and meanwhile, no display driving stage is arranged between the third touch driving stage C3 and the fourth touch driving stage C4; or, no display driving stage is set between the second touch driving stage C2 and the third touch driving stage C3, and at the same time, no display driving stage is set between the third touch driving stage C3 and the fourth touch driving stage C4, etc.

Optionally, no display driving stage is disposed between adjacent touch driving stages.

Fig. 10 is a schematic structural diagram of another touch display panel according to an embodiment of the invention, and as shown in fig. 10, the touch display panel 100 includes a display area VA; fig. 11 is a comparison diagram of a touch display panel timing sequence according to another embodiment of the present invention and a touch display panel timing sequence according to the prior art, as shown in fig. 11, an image frame includes 1 display driving stage P and 4 touch driving stages C. The 4 touch driving stages C include a first touch driving stage C1, a second touch driving stage C2, a third touch driving stage C3, and a fourth touch driving stage C4. The touch scan signal is applied to the touch electrode 10 in the first touch area AA1 in the first touch driving stage C1, the touch scan signal is applied to the touch electrode 10 in the second touch area AA2 in the second touch driving stage C2, the touch scan signal is applied to the touch electrode 10 in the third touch area AA3 in the third touch driving stage C3, the touch scan signal is applied to the touch electrode 10 in the fourth touch area AA4 in the fourth touch driving stage C4, and then the sub-pixels of the entire display area VA are scanned line by line in the display driving stage P.

When a finger touches the first touch area AA1, after the touch electrode 10 in the first touch area AA1 is scanned, that is, when the touch electrode 10 in the first touch area AA1 is touched, the touch driving circuit cannot detect the touch and needs to wait for the second touch frame T0 to detect the touch, and then the time T1 is missed, wherein T1 includes time for time-sharing scanning the touch electrode in the second touch area AA2, the touch electrode in the third touch area AA3, and the touch electrode in the fourth touch area AA4, that is, c2+c3+c4, which is the same as the time for time-sharing scanning the touch electrode 10 'in the second touch area AA2', the touch electrode 10 'in the third touch area AA3', and the touch electrode 10 'in the fourth touch area AA4' in the prior art; at this time, since no display driving stage is set between the adjacent touch driving stages C, i.e., the first time period is 0, which is less than the sum (the second time period) of the durations of the display driving stages P 'between the adjacent touch driving stages C' in one touch frame T0 'in the prior art, i.e., the time of T1' is reduced compared with the prior art. After the scanning of all the touch electrodes 10 in the touch display panel 100 is completed in the second touch frame T0, the finger touching the first touch area AA1 (the L-th touch area) is found, i.e. the time T2 is needed, and the time T2 is also the time of one touch frame T0, however, according to the principle of touch calculation accuracy, T2 is discarded. In the third touch frame T0, the scanning of all the touch electrodes 10 in the touch display panel 100 needs to be continuously completed, and touch position data is collected. Then, a phase T4 is entered, wherein the phase T4 is a data processing and touch position determining phase, and the time of the phase T4 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 determining the touch position is t1+t2+t3+t4=t1+2t0+t4, where T1 is smaller than T1 'and T0' in the prior art, and T4 is the same as T0 'in the prior art, compared with the time required for completing the whole process of determining the touch position in the prior art is T1' +2t0'+t4', the problem of touch delay is improved, 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.

As can be seen from the above, when a touch scanning signal is applied to the touch electrode of at least one touch area in the touch area group, and then the touch scanning signal is applied to the touch electrode of other touch areas and the display is driven to the sub-pixels of the display area, the sum of the durations of the display driving phases between adjacent touch driving phases in each touch frame is smaller than the sum of the durations of the display driving phases between adjacent touch driving phases in each touch frame in the prior art (the touch driving phases and the display driving phases are alternately distributed, and the durations of the display driving phases between adjacent touch driving phases are the same). Thus, when one of the N touch areas is touched by a finger after the touch electrode in the touch area is scanned, a period of time during which the touch scanning signal is applied to the touch electrode in the other touch areas (the touch areas except the first touch area in the N touch areas) in the touch frame is smaller than a period of time during which the scanning of the touch electrode in the touch area except the first touch area in the N touch areas is completed in the prior art. Compared with the prior art, the time of T1' is shortened, so that the problem of touch delay is solved, 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 touch 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 a common electrode (or a cathode) in a time-sharing manner in a display driving stage and a touch driving stage so as to realize the display of a touch display panel and the time-sharing driving of touch.

Fig. 12 is a schematic view of a partial film structure of a touch display panel according to an embodiment of the present invention, and as shown in fig. 12, the touch display panel 100 includes a liquid crystal touch display panel, and the liquid crystal touch display panel includes 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 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 110 includes a plurality of thin film transistors 50; the first metal layer M1 includes a gate electrode of the thin film transistor 50, a scanning line, and the like (not shown in the drawing); the second metal layer M2 includes a source electrode 53, a drain electrode 54, a data line, and the like (not shown) of the thin film transistor 50; the third metal layer M3 includes a touch trace 30; the array substrate 110 further includes 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 10. Specifically, when the common electrode 70 is multiplexed as the touch electrode 10, touch and display time-sharing driving is required, that is, touch scanning signals are applied to the M touch electrodes 10 in the N touch areas AA in a time-sharing manner corresponding to the multiple touch driving phases C of each touch frame one by one, that is, the signals received by the common electrode 70 are touch scanning signals; in the display driving stage P, the sub-pixels in the display area VA are display-driven, that is, the signal received by the common electrode 70 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. 12 only takes the thin film transistor 50 in the touch display panel as the bottom gate thin film transistor as an example, but the present application is not limited thereto, and in other alternative embodiments, the thin film transistor 50 may be a top gate thin film transistor. In addition, in fig. 12, the electrical connection between the common electrode block 70 and the touch trace 30 is connected by a cross line, but the present application is not limited thereto, and one skilled in the art may set the electrical connection according to the actual situation of the product.

It should be further noted that the liquid crystal touch display panel provided in this embodiment may be applied to liquid crystal touch display panels of TN type, FFS type, IPS type, and the like. In fig. 12, only the touch display panel is taken as 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 one skilled in the art can select the type of the touch display panel and set the specific structure and connection relationship of the touch display panel according to the actual situation.

Optionally, fig. 13 is a timing diagram of another touch display panel according to an embodiment of the present application, where each image frame further includes at least one Noise detection stage Noise as shown in fig. 13; the driving method further includes: noise detection is carried out through a noise detection stage so as to obtain a touch detection noise signal; and determining the touch position according to the fed back touch detection signal and the touch detection noise signal.

In this embodiment, by performing noise detection in the noise detection stage, and then determining the touch position according to the obtained touch detection noise signal and the touch detection signal, the influence of the background noise on the touch detection signal is avoided, and the accuracy of touch position detection is improved.

Optionally, with continued reference to fig. 13, each touch detection frame includes a Noise detection phase Noise. The accuracy of touch position detection can be further improved by performing noise detection in each touch frame.

It should be noted that, in the above embodiments, one image frame includes two touch frames, and one touch frame includes 4 touch driving stages, but the present application is not limited thereto, and those skilled in the art may set the touch driving stages according to the actual situation.

Based on the same inventive concept, the embodiment of the application also provides a driving circuit. The driving circuit provided by the embodiment of the application 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; wherein Q and M are positive integers greater than or equal to 1; n is a positive integer greater than 1. Fig. 14 is a schematic structural diagram of a driving circuit according to an embodiment of the present application, and as shown in fig. 14, the driving circuit according to an embodiment of the present application includes a timing control circuit 300 for providing 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; each image frame comprises at least one touch frame; each touch frame comprises a plurality of touch driving stages; the display driving circuit 400 is configured to perform display driving on the touch display panel in a display driving stage; the touch driving circuit 200 applies a touch scanning signal to the touch electrode in the touch area in a touch driving stage; the touch control device comprises a plurality of touch control driving stages of each touch control frame and N touch control areas, wherein the touch control driving stages of each touch control frame correspond to the N touch control areas one by one; the time for applying the touch scanning signals to the touch electrodes in different touch areas is different; the time overlap of touch scanning signals applied by the M touch electrodes in each touch area; and applying a time overlap of touch scanning signals to M touch electrodes of the touch areas with the same sequence numbers of different touch groups; at least one touch driving stage of the plurality of touch driving stages of each touch frame is positioned before the display driving stage, and the sum of the duration of the display driving stages between the adjacent touch driving stages in each touch frame is a first time period; when the touch control driving phases and the display driving phases are alternately distributed and the duration of the display driving phases between the adjacent touch control driving phases is the same, the sum of the duration of the display driving phases between the adjacent touch control driving phases in each touch control frame is a second time period; the first time period is smaller than the second time period so as to solve the problem of touch delay and achieve the effect of improving touch detection performance.

Optionally, fig. 15 is a schematic structural diagram of a touch driving circuit according to an embodiment of the present invention, as shown in fig. 15, the touch driving circuit 200 includes m×q gate circuits 210, i.e. the number of gate circuits 210 may be the same as the product of the number of touch electrodes 10 in each touch area AA and the number of touch groups AA0, for example; each of the gate circuits 210 includes N switch units 211, that is, the number of switch units 211 in each gate circuit 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 touch scan signals can be input simultaneously; the second end of the ith switching unit 211 in each gating circuit 210 is electrically connected to the touch electrode 10 of the ith touch area AA; the jth touch electrode 10 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 of the same sequence number in the different gate circuits 210 are turned on sequentially to apply touch scan signals to the M touch electrodes 10 of the different touch areas AA in a time-sharing manner.

For example, the touch display panel 100 includes 1 touch area group AA0, where the touch area group AA0 includes 4 touch areas AA sequentially arranged along the pixel row direction along the touch area group, and the 4 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, respectively; each touch area AA comprises 4 touch electrodes 10; the touch driving circuit 200 includes 4 gate circuits 210; each of the gate circuits 210 includes 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 include first, second, third, and fourth gate control lines SW1, SW2, SW3, and SW4, respectively, wherein the first gate control lines SW1 are electrically connected to the first switching units 2111 of the 4 gate circuits 210, the second gate control lines SW2 are electrically connected to the second switching units 2112 of the 4 gate circuits 210, the third gate control lines SW3 are electrically connected to the third switching units 2113 of the 4 gate circuits 210, 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 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 10 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 10 in the touch area AA, gate circuits 210, and switch units 211 in the gate circuits 210.

For example, at the first moment, the first gate control line SW1 outputs an active level, the first switch units 2111 in the 4 gate circuits 210 are turned on to transmit the touch scanning 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 plurality of touch electrodes 10 in the first touch area AA1, and after the touch electrodes 10 in the first touch area AA1 are scanned, the finger touches the first touch area AA1, and at this moment, the touch driving circuit cannot detect the touch at this point, and needs to wait for the second touch frame to detect the touch. 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 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 plurality of touch electrodes 10 in the second touch area AA 2; 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 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 plurality of touch electrodes 10 in the third touch area AA 3; at the fourth moment, the fourth gate control line SW4 outputs an active level, the fourth switch unit 2114 in the 4 gate circuits 210 is turned on to transmit the touch scanning 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 plurality of touch electrodes 10 in the fourth touch area AA4, and then scans the sub-pixels in the touch display panel row by row, and although the scanning of all the touch electrodes 10 in the touch display panel is completed, no touch is detected, that is, the sum of the times of the touch electrodes 10 in the second touch area AA2 and the touch electrodes 10 in the fourth touch area AA4 of the third touch area AA3 is missed, and since the progressive scanning of the sub-pixels in the touch display panel is performed after the scanning of all the touch electrodes 10 in the touch display panel is completed, the time of T1' is reduced compared with the setting of the display driving stage between adjacent touch driving stages in the prior art. Therefore, the time required for completing the whole process of determining the touch position is reduced, the problem of touch delay is solved, and the effect of improving the touch detection efficiency is realized.

The present embodiment is described by way of example only with reference to fig. 11, but the present application is not limited thereto, and other embodiments are applicable.

Based on the same inventive concept, the embodiment of the application also provides a touch display device. The touch display device provided by the embodiment of the application comprises the touch display panel and the driving circuit in the embodiment, so that the touch display device provided by the embodiment of the application 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 application.

Fig. 16 is a schematic structural diagram of a touch display device according to an embodiment of the application, and as shown in fig. 16, 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 includes 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 each image frame comprises at least one display driving stage and a plurality of touch driving stages; each image frame comprises at least one touch frame; each touch frame comprises a plurality of touch driving stages;

The driving method includes:

The first time period is less than the second time period;

the image frame includes a plurality of display driving phases; the touch display panel comprises a plurality of display areas which are sequentially arranged along the direction of the pixel columns; the display driving stage and the touch driving stage are sequentially and alternately distributed;

when the sum of the time lengths of the display driving phases between the adjacent touch driving phases in each touch frame is a first time period, the time length of the display driving phase between the adjacent touch driving phases in each touch frame is a first time length;

when the touch control driving phases and the display driving phases are alternately distributed and the duration of the display driving phases between the adjacent touch control driving phases is the same, the sum of the duration of the display driving phases between the adjacent touch control driving phases in each touch control frame is a second time period, and the duration of the display driving phases between the adjacent touch control driving phases in each touch control frame is a second duration;

the first time period is less than the second time period.

2. The driving method according to claim 1, wherein no display driving stage is provided between at least some of the adjacent touch driving stages.

3. The driving method according to claim 2, wherein no display driving stage is provided between adjacent touch driving stages.

4. The driving method according to claim 1, wherein each image frame further comprises at least one noise detection stage;

the driving method further includes:

noise detection is carried out through a noise detection stage so as to obtain a touch detection noise signal;

and determining the touch position according to the fed back touch detection signal and the touch detection noise signal.

5. The driving method according to claim 4, wherein each touch frame includes the noise detection stage.

6. The driving method according to claim 1, wherein the time of touch scan signals applied by the M touch electrodes in each touch area is the same; and the time for applying touch scanning signals to M touch electrodes of the touch area with the same sequence number and different touch groups is the same.

7. 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 Q and M are positive integers greater than or equal to 1; n is a positive integer greater than 1;

The driving circuit includes:

the first time period is less than the second time period;

The first time period is less than the second time period.

8. The driving circuit of claim 7, 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 touch scanning signals to M touch electrodes in different touch areas in a time sharing mode.

9. A touch display device comprising a touch display panel and the drive circuit of any one of claims 7-8.

10. The touch display device of claim 9, wherein the touch display panel comprises a liquid crystal display panel or an organic light emitting display panel.