CN120295505A - A touch display panel, a touch display device, and a touch system - Google Patents

Abstract

The embodiment of the present application provides a touch display panel, a touch display device, and a touch control system, including a first signal transmission structure, the first signal transmission structure is used to transmit a first non-fixed potential signal, the first non-fixed potential signal is a display signal; the touch display panel includes an active pen touch mode, in which the duty cycle of the first non-fixed potential signal is variable. The present application can reduce the influence of the noise generated by the first non-fixed potential signal on the operation of the active pen, which is conducive to improving the working performance of the active pen.

Description

Touch display panel, touch display device and touch system

Technical Field

The present application relates to the field of display technologies, and in particular, to a touch display panel, a touch display device, and a touch system.

Background

Along with popularization of artificial intelligence display concepts and popularization of business offices, interaction requirements of customers and consumers on business display products are continuously improved, and diversified application scenes also have higher requirements on touch control functions of the display.

In the prior art, in order to improve the operation convenience of a user, an active pen can be hung on the touch display panel to be used as a click input or to perform writing or drawing actions on the touch display panel. However, in the existing active pen touch application, the interference between the display signal and the touch signal is large, which easily causes the abnormal touch of the active pen. Thus, a solution is needed.

Disclosure of Invention

In view of the above, the embodiments of the present application provide a touch display panel, a touch display device and a touch system to solve the above problems.

In a first aspect, an embodiment of the present application provides a touch display panel, including a first signal transmission structure, where the first signal transmission structure is configured to transmit a first non-fixed potential signal, the first non-fixed potential signal is a display signal, and the touch display panel includes an active pen touch mode, where a duty cycle of the first non-fixed potential signal is variable in the active pen touch mode.

In one implementation manner of the first aspect, in a frame of a touch display panel, the first non-fixed potential signal includes a plurality of enable level signals and a plurality of non-enable level signals, wherein at least part of enable level signals have different pulse widths.

In an implementation manner of the first aspect, in a frame of the touch display panel, pulse widths of at least part of the non-enable level signals are different.

In one implementation manner of the first aspect, in a frame of a touch display panel, the first non-fixed potential signal includes a plurality of enable level signals and a plurality of non-enable level signals, where pulse widths of the enable level signals are the same, and pulse widths of at least some of the non-enable level signals are different.

In an implementation manner of the first aspect, a first type of interval period is included between two adjacent display frame images, and in the active pen touch mode, at least part of time lengths of the first type of interval period are different.

In an implementation manner of the first aspect, within a frame of a touch display panel, a duty ratio of the first non-fixed potential signal is fixed or variable.

In an implementation manner of the first aspect, the first signal transmission structure includes a first type signal transmission structure and a second type signal transmission structure, the first non-fixed potential signal includes a first type signal and a second type signal, the first type signal transmission structure is used for transmitting the first type signal, and the second type signal transmission structure is used for transmitting the second type signal.

In one implementation manner of the first aspect, the first type of signals are set corresponding to the second type of signals, and enable level signals in the first type of signals at least partially overlap with enable level signals in the second type of signals, wherein in a frame of picture of the touch display panel, the first type of signals comprise a plurality of first subcycles, and the second type of signals comprise a plurality of second subcycles, and at least part of the first subcycles are different from the corresponding second subcycles in time length.

In one implementation manner of the first aspect, the first type of signal is a data voltage signal, and the second type of signal is a scan signal.

In an implementation manner of the first aspect, the first non-fixed potential signal includes a scan signal, the touch display panel further includes a plurality of clock signals sequentially transmitted, and an enable level signal in the scan signal corresponds to an enable signal in at least a part of the clock signals.

In one implementation manner of the first aspect, a frame period of the touch display panel includes a plurality of clock signal cycle phases, and each clock signal sequentially outputs an enable level signal in one clock signal cycle phase, wherein in one clock signal cycle phase, at least part of enable level signals in the clock signals have different pulse widths.

In one implementation manner of the first aspect, a frame period of the touch display panel includes a plurality of clock signal cycle phases, and each clock signal sequentially outputs an enable level signal in one clock signal cycle phase, wherein two adjacent clock signal cycle phases include a second type interval period, and at least part of the second type interval periods have different durations.

In one implementation manner of the first aspect, the touch display panel further includes a normal display mode, in which the first non-fixed potential signal is a fixed duty cycle signal, and in which the refresh frequency of the touch display panel is the same in the normal display mode and the active pen touch mode.

In one implementation manner of the first aspect, in the active pen touch mode, a total duration of the enable level signal and the non-enable level signal in the first non-fixed potential signal is a fixed value.

In a second aspect, an embodiment of the present application provides a touch display device, including a touch display panel as provided in the first aspect.

In a third aspect, an embodiment of the present application provides a touch system, including the touch display device and the active pen as provided in the second aspect.

In the embodiment of the application, the duty ratio of the first non-fixed potential signal used for displaying is set to be variable, so that the frequency of noise generated by the first non-fixed potential signal can be changed by adjusting the duty ratio of the first non-fixed potential signal, which is beneficial to enabling the frequency of noise generated by the first non-fixed potential signal to be different from the working frequency of the active pen, thereby being beneficial to reducing the overlapping of the noise and the working period of the active pen, reducing the influence of the noise on the working of the active pen and further being beneficial to improving the touch performance of the active pen in the active pen touch mode of the touch display panel.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a touch display panel according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a prior art noise-influencing active pen signal;

FIG. 3 is a schematic diagram showing the correspondence between noise and active pen signals according to an embodiment of the present application;

FIG. 4 is a schematic diagram showing the correspondence between noise and active pen signals according to another embodiment of the present application;

FIG. 5 is a schematic diagram of another embodiment of the present application for providing noise and active pen signals;

FIG. 6 is a schematic diagram of a noise-influencing active pen signal according to the prior art;

FIG. 7 is a schematic diagram of another embodiment of the present application for providing noise and active pen signals;

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

FIG. 9 is a schematic diagram of still another embodiment of the present application for providing noise and active pen signals;

FIG. 10 is a schematic diagram showing the correspondence between noise and active pen signals according to another embodiment of the present application;

FIG. 11 is a schematic diagram of a shift register circuit according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a clock signal and a scan signal according to an embodiment of the present application;

FIG. 13 is a schematic diagram showing the correspondence between noise and active pen signals according to another embodiment of the present application;

FIG. 14 is a schematic diagram showing the correspondence between noise and active pen signals according to another embodiment of the present application;

fig. 15 is a schematic diagram of a touch display device according to an embodiment of the present application;

Fig. 16 is a schematic diagram of a touch system according to an embodiment of the present application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or b, and may mean that a single first exists while a single first and a single second exist. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Fig. 1 is a schematic diagram of a touch display panel according to an embodiment of the application.

As shown in fig. 1, an embodiment of the present application provides a touch display panel 01, where the touch display panel 01 includes a display area AA and a non-display area NA surrounding the display area AA. The display area AA includes a plurality of sub-pixels PX, a plurality of scanning signal lines SL and a plurality of data signal lines DL, wherein the scanning signal lines SL extend along a first direction X, the plurality of scanning signal lines SL are arranged along a second direction Y, and the first direction X intersects the second direction Y. The scanning signal line SL is electrically connected to the sub-pixel PX, and transmits a scanning signal to the sub-pixel PX.

The data signal lines DL extend along the second direction Y, and the plurality of data signal lines DL are arranged along the first direction X, and the data signal lines DL are electrically connected to the sub-pixels PX for transmitting data voltage signals to the sub-pixels PX.

The first direction X is a row direction in the touch display panel 01, and the second direction Y is a column direction in the touch display panel 01.

The touch display panel 01 further includes a shift register circuit VSR, which may be disposed in the non-display area NA, and is electrically connected to the scan signal line SL and a clock signal line (not shown in the drawing) for transmitting clock signals to the shift register circuit VSR, and the shift register circuit VSR may sequentially transmit scan signals to the plurality of scan signal lines SL under control of the clock signals received by the shift register circuit VSR, thereby implementing progressive scanning of the sub-pixels PX.

In the progressive scanning process of the sub-pixels PX, the data signal lines DL sequentially transmit data voltage signals to the corresponding sub-pixels PX, and the sub-pixels PX emit brightness meeting the requirements according to the received data voltage signals. The scan signal, the data voltage signal, the clock signal, and the like are display signals in the touch display panel 01.

With continued reference to fig. 1, the touch display panel 01 includes a first signal transmission structure 10, where the first signal transmission structure 10 is configured to transmit a first unfixed potential signal 20, and the first unfixed potential signal 20 is a display signal.

The first non-fixed potential signal 20 may include at least one of the scan signal, the data voltage signal, and the clock signal described above, for example. Correspondingly, the first signal transmission structure 10 may include at least one of the shift register circuit VSR, the scan signal line SL, the data signal line DL, and the clock signal line.

It should be noted that fig. 1 is only a schematic diagram of the shift register circuit VSR as an example of the first signal transmission structure 10. The first signal transmission structure 10 may be a structure for arbitrarily transmitting an unfixed potential signal for display in the touch display panel 01. The first non-fixed potential signal 20 may be any non-fixed potential signal for display.

The touch display panel 01 includes an active pen touch mode, that is, the touch display panel 01 provided by the embodiment of the application can be matched with an externally hung active pen for touch. In the active pen touch mode, the duty cycle of the first non-fixed potential signal 20 is variable.

It will be appreciated that in the active pen touch application, the active pen may send an electromagnetic signal or other wireless signals to the touch display panel, and the touch display panel may have different functions, such as a writing function or an erasing function, after receiving and analyzing the signal sent by the active pen.

The inventor of the application discovers that noise is generated when a driving signal for display in a touch display panel jumps, the normal operation of an active pen is influenced when the frequency of the noise is overlapped with the working frequency band of the active pen, and the larger the overlapping quantity of the noise and the working period of the active pen is, the larger the influence of the noise on the working process of the active pen is, and the touch abnormality of the active pen is more easily caused.

In the prior art, a driving signal (such as a scanning signal, a data voltage signal, etc.) in a touch display panel is usually a fixed duty ratio, and once the working frequency band of the active pen includes a frequency of noise generated by the driving signal, the noise overlaps more with the working period of the active pen, which seriously affects the normal operation of the active pen.

As shown in fig. 2, fig. 2 is a schematic diagram of a noise-influencing active pen signal in the prior art, in which a driving signal 10' for displaying in a touch display panel is a non-fixed potential signal with a fixed duty cycle, and a period of the driving signal 10' is T, and a period of the generated noise 11' is T and a frequency is 1/T. If the working frequency band of the active pen includes 1/T frequency, when the active pen works at 1/T frequency, i.e. the working period is T, the period S of the working signal generated by the active pen will overlap with the noise 11' more, which seriously affects the normal operation of the active pen. In the drawings of the present application, the non-horizontal portion of the line indicating the noise is the noise according to the present application.

Therefore, in the embodiment of the present application, the duty ratio of the first non-fixed potential signal 20 for displaying is set to be variable, so that the frequency of the noise generated by the first non-fixed potential signal 20 can be changed by adjusting the duty ratio of the first non-fixed potential signal 20, which is beneficial to making the frequency of the noise generated by the first non-fixed potential signal 20 different from the working frequency of the active pen, thereby being beneficial to reducing the overlapping of the noise and the working period of the active pen, reducing the influence of the noise on the working of the active pen, and further being beneficial to improving the touch performance of the active pen in the active pen touch mode of the touch display panel 01.

As shown in fig. 3, fig. 3 is a schematic diagram corresponding to a noise and an active pen signal provided by the embodiment of the present application, and assuming that the working period of the active pen is T and the working frequency is 1/T, in a frame period Z of the touch display panel 01, the duty ratio of the first non-fixed potential signal 20 may be changed, so that the working period includes t+ A, T +b and t+c, A, B, C are not equal to 0, where any two numbers in A, B, C are not the same. The frequency of the noise 30 generated by the first non-fixed potential signal 20 includes 1/t+a, 1/t+b, and 1/t+c, and the noise 30 overlaps less with the period S of the active pen generating the working signal, so as to effectively improve the influence of the noise 30 on the active pen.

Optionally, t+c=t-a-B, so that the average period of the first non-fixed potential signal 20 may be T, which is beneficial to keeping the overall operating frequency and the display time of the touch display panel 01 unchanged while improving the influence of the noise 30 on the operation of the active pen, and ensuring the display effect in the active pen touch mode.

In one embodiment of the present application, as shown in fig. 3, the first non-fixed potential signal 20 includes a plurality of enable level signals VH (e.g., high level) and a plurality of non-enable level signals VL (e.g., low level) in one frame period Z of the touch display panel 01. Taking the first non-fixed potential signal 20 as a scan signal, the enable level signal VH refers to that the transistor in the subpixel PX can be controlled to be turned on after the enable level signal VH is transmitted to the transistor, and the disable level signal VL refers to that the transistor in the subpixel PX can be controlled to be turned off after the disable level signal VL is transmitted to the transistor.

Wherein at least part of the enable level signals VH (e.g., high level) have different pulse widths.

For example, as shown in fig. 3, the plurality of enable level signals VH include a first enable level signal VH1, a second enable level signal VH2, a third enable level signal VH3, and a fourth enable level signal VH4, the first enable level signal VH1 has a pulse width W1, the second enable level signal VH2 has a pulse width W2, the third enable level signal VH3 has a pulse width W3, and the fourth enable level signal VH4 has a pulse width W4, W1, W2, W3, and W4 different from each other.

In the embodiment of the application, in a frame period Z of the touch display panel 01, the duty ratio of the first non-fixed potential signal 20 can be changed by setting at least different pulse widths of the enable level signal VH, so that the influence of noise generated by the first non-fixed potential signal 20 on the working period of the active pen is reduced.

When the first non-fixed potential signal 20 is a data voltage signal, the enable level signal VH may be a data voltage signal required for the sub-pixels PX, and the non-enable level signal VL may be a transition voltage signal between data voltage signals required for transmitting the two sub-pixels PX.

In an embodiment of the present application, please continue to refer to fig. 3, in a frame period Z of the touch display panel 01, at least part of the pulse widths of the non-enable level signals VL are different.

For example, as shown in fig. 3, the plurality of non-enable level signals VL include a first non-enable level signal VL1, a second non-enable level signal VL2, and a third non-enable level signal VL3, the first non-enable level signal VL1 is located between the first enable level signal VH1 and the second enable level signal VH2, a pulse width thereof is D1, the second non-enable level signal VL2 is located between the second enable level signal VH2 and the third enable level signal VH3, a pulse width thereof is D2, the third non-enable level signal VL3 is located between the third enable level signal VH3 and the fourth enable level signal VH4, and pulse widths thereof are D3, D1, D2, and D3 are different from each other.

The embodiment of the application also sets at least part of the non-enabling level signals VL to have different pulse widths while setting at least part of the enabling level signals VH to have different pulse widths, which is beneficial to improving the flexibility of adjusting the duty ratio of the first non-fixed potential signals 20 while realizing the variable duty ratio of the first non-fixed potential signals 20, thereby being beneficial to further reducing the influence of noise generated by the first non-fixed potential signals 20 on the working period of the active pen.

Fig. 4 is a schematic diagram of still another correspondence between noise and active pen signals according to an embodiment of the present application.

In one embodiment of the present application, as shown in fig. 4, in a frame period Z of the touch display panel 01, the first non-fixed potential signal 20 includes a plurality of enable level signals VH (e.g., high level signals) and a plurality of non-enable level signals VL (e.g., low level signals).

Wherein the pulse widths of the respective enable level signals VH are the same, and the pulse widths of at least part of the non-enable level signals VL are different.

For example, as shown in fig. 4, the plurality of enable level signals VH includes a first enable level signal VH1, a second enable level signal VH2, a third enable level signal VH3, and a fourth enable level signal VH4, the first enable level signal VH1 has a pulse width W1, the second enable level signal VH2 has a pulse width W2, the third enable level signal VH3 has a pulse width W3, the fourth enable level signal VH4 has a pulse width W4, w1=w2=w3=w4.

The plurality of non-enable level signals VL include a first non-enable level signal VL1, a second non-enable level signal VL2, and a third non-enable level signal VL3, where the first non-enable level signal VL1 is located between the first enable level signal VH1 and the second enable level signal VH2, and has a pulse width D1, the second non-enable level signal VL2 is located between the second enable level signal VH2 and the third enable level signal VH3, and has a pulse width D2, and the third non-enable level signal VL3 is located between the third enable level signal VH3 and the fourth enable level signal VH4, and has a pulse width D3. D1, D2, D3 are different from each other.

In the embodiment of the application, in a frame period Z of the touch display panel 01, by setting at least different pulse widths of the non-enable level signals VL, the duty ratio of the first non-fixed potential signal 20 can be changed, so that the influence of noise generated by the first non-fixed potential signal 20 on the working period of the active pen is reduced.

For example, as shown in fig. 4, assuming that the operating frequency of the active pen is 1/T, in a frame period Z of the touch display panel 01, the duty ratio of the first non-fixed potential signal 20 may be changed by setting at least part of the non-enable level signals to have different pulse widths, so that the operating periods thereof including t+ A, T +b and t+c, A, B, C are not equal to 0, where any two numbers in A, B, C are different. The frequency of the noise 30 generated by the first non-fixed potential signal 20 includes 1/t+a, 1/t+b, and 1/t+c, and the noise 30 overlaps less with the period S of the active pen generating the working signal, so as to effectively improve the influence of the noise 30 on the active pen.

Meanwhile, in the frame period Z of the touch display panel 01, the pulse widths of the enable level signals VH are the same, which is beneficial to reducing the complexity of the first unfixed potential signal 20, thereby being beneficial to reducing the control difficulty of the touch display panel 01.

Fig. 5 is a schematic diagram of still another noise and active pen signal according to an embodiment of the present application.

In one embodiment of the present application, as shown in fig. 5, a first type of interval period G is included between two adjacent display frame images, and in the active pen touch mode, at least part of the first type of interval period G has different durations.

As shown in fig. 5, the touch display panel 01 includes a plurality of display frames Z, wherein the plurality of display frames Z includes a first display frame Z1, a second display frame Z2, a third display frame Z3, and a fourth display frame Z4 that are sequentially displayed, the touch display panel 01 includes a plurality of first type interval periods G, the plurality of first type interval periods G includes a first interval period G1, a second interval period G2, and a third interval period G3, the first interval period G1 is located between the first display frame Z1 and the second display frame Z2, the second interval period G2 is located between the second display frame Z2 and the third display frame Z3, the third interval period G3 is located between the third display frame Z3 and the fourth display frame Z4, and the durations of the first interval period G1, the second interval period G2, and the third interval period G3 are different from each other.

The present inventors have found that, in the prior art, as shown in fig. 6, fig. 6 is another schematic diagram of a noise-influencing active pen signal in the prior art, a display frame interval G ' is disposed between two adjacent display frames Z ', and the durations of different display frame intervals G ' are the same. That is, the driving signal 10' for display has a fixed duty ratio not only in the display frame Z ', but also between the plurality of display frames Z '. Assuming that the period of the plurality of display frames Z ' is H, the driving signal 10' also generates noise 11' having an operating frequency of 1/H. When the working period of the active pen corresponding to the display frame Z 'is H and the frequency is 1/H, the whole working period M of the active pen is overlapped with the noise 11' more, and the normal working of the active pen is seriously affected.

Therefore, in the embodiment of the present application, if at least part of the first type of interval periods G are set to be different in duration, the first non-fixed potential signal 20 can be made to have a variable duty ratio between the plurality of display frames Z, which is beneficial to changing the working frequency of the display frames Z so that the frequency of the display frames Z is different from the frequency of the active pen, thereby being beneficial to reducing the overlapping of the whole working period and noise of the active pen and improving the touch performance of the active pen.

For example, as shown in fig. 5, assuming that the overall working period of the active pen corresponding to the display frame Z is H and the frequency is 1/H, during the multi-frame display process of the touch display panel 01, the duty ratio of the first fixed potential signal 20 between the display frames Z may be changed by setting at least part of the first type interval period G to be different in duration, so that the working period of the display frame Z including h+ A, H +b and h+c, A, B, C are not equal to 0, where any two numbers in A, B, C are different. The frequency of the noise 30 generated by the first non-fixed potential signal 20 includes 1/h+a, 1/h+b, and 1/h+c, so that the noise 30 overlaps less with the whole working period M of the active pen, and the influence of the noise 30 on the active pen can be effectively reduced.

Optionally, h+c=h-a-B, so that the average period of the display frame Z may be H, which is beneficial to keeping the overall operating frequency and the display time of the touch display panel 01 unchanged while improving the influence of the noise 30 on the operation of the active pen, and ensuring the display effect in the active pen touch mode.

On the basis of setting the different durations of at least part of the first type interval period G, the duty ratio of the first non-fixed potential signal 20 is fixed or variable within one frame picture Z of the touch display panel 01.

That is, when the duration of the first type interval period G between at least part of the adjacent two display frames Z is set to be different, the first unfixed potential signal 20 may be set as a fixed duty signal, or the first unfixed potential signal 20 may be set as a variable duty signal within the same display frame Z.

Illustratively, as shown in fig. 5, the first non-fixed potential signal 20 is a fixed duty cycle signal within the same display frame Z. At this time, even if the period S of the active pen generated signal overlaps more with the noise generated by the first non-fixed potential signal 20 in one display frame Z, the period S of the active pen generated signal is offset from the noise 30 generated by the first non-fixed potential signal 20 in the other display frame Z because the duration of the first type interval period G between at least part of the adjacent two display frames Z is different, so that the overlapping of the noise 30 and the period S of the active pen generated signal can be reduced as a whole, thereby reducing the influence of the noise 30 on the active pen operation.

In addition, in the same display frame Z, the first non-fixed potential signal 20 is set to be a fixed duty cycle signal, so that the complexity of the first non-fixed potential signal 20 can be reduced, thereby being beneficial to reducing the control difficulty of the touch display panel 01.

As shown in fig. 7, fig. 7 is a schematic diagram showing the correspondence between noise and active pen signals according to another embodiment of the present application, and the first non-fixed potential signal 20 is a variable duty cycle signal within the same display frame Z. Thus, the noise 30 generated by the first non-fixed potential signal 20 is more dispersed, so that the overlapping of the noise 30 and the period S of the signal generated by the active pen is further reduced, and the influence of the noise 30 on the active pen is reduced.

Fig. 8 is a schematic diagram of another touch display panel according to an embodiment of the application.

In one embodiment of the present application, as shown in fig. 8, the first signal transmission structure 10 includes a first signal transmission structure 11 and a second signal transmission structure 12, the first signal transmission structure 11 is used for transmitting the first signal 21, and the second signal transmission structure 12 is used for transmitting the second signal 22, where the first signal 20 includes a first signal 21 and a second signal 22.

Of course, the duty cycle of both the first type signal 21 and the second type signal 22 is variable.

Alternatively, as shown in fig. 8, the first type signal transmission structure 11 is a data signal line DL, and the first type signal 21 is a data voltage signal. The second signal transmission structure 12 is a shift register circuit VSR, and the second signal 22 is a scan signal.

In the embodiment of the present application, the first non-fixed potential signal 20 may be a signal formed by overlapping the first type signal 21 and the second type signal 22, and the noise 30 generated by the first non-fixed potential signal 20 may be an overlapping noise generated by the first type signal 21 and the second type signal 22.

As shown in fig. 9, fig. 9 is a schematic diagram of still another noise and active pen signal according to an embodiment of the present application, where the first type signal 21 and the second type signal 22 are disposed correspondingly, and an enable level signal (e.g., a high level signal) in the first type signal 21 and an enable level signal (e.g., a high level signal) in the second type signal 22 at least partially overlap, and in a frame Z of the touch display panel 01, a period of the first type signal 21 is the same as a period of the corresponding second type signal 22.

For example, as shown in fig. 9, in a frame Z of the touch display panel 01, the period of the first type signal 21 includes t+ A, T +b and t+c, and the period of the corresponding second type signal 22 also includes t+ A, T +b and t+c.

Based on this arrangement, the duty ratios of the first type signal 21 and the second type signal 22 can be correspondingly adjusted, so that the noise 30 generated by superposition of the two signals overlaps less with the period S of the active pen generating the working signal, thereby reducing the influence of the noise 30 on the active pen working.

In addition, the period of the first type signal 21 is set to be the same as the period of the corresponding second type signal 22, and the duty ratio of the corresponding first type signal 21 and second type signal 22 can be adjusted in the same proportion, so that the complexity of the first type signal 21 and the second type signal 22 is reduced, and the control difficulty of the touch display panel 01 is reduced.

As shown in fig. 10, fig. 10 is a schematic diagram illustrating still another noise and active pen signal according to an embodiment of the present application, where the first type signal 21 is disposed corresponding to the second type signal 22, and the enable level signal (e.g., a high level signal) in the first type signal 21 at least partially overlaps the enable level signal (e.g., a high level signal) in the second type signal 22.

In a frame Z of the touch display panel 01, the first type signal 21 includes a plurality of first sub-periods, and the second type signal 22 includes a plurality of second sub-periods.

Wherein at least part of the first sub-period is different from the corresponding second sub-period.

For example, as shown in fig. 10, the first plurality of sub-periods includes t+ A, T +b and t+c, A, B, C each not equal to 0, where any two of the A, B, C numbers are different. The corresponding second sub-period comprises T+a, T+b and T+c, wherein all of a, b and c are not equal to 0, and any two of a, b and c are different in number. Wherein T+a, T+b and T+c correspond to T+ A, T +B and T+C, respectively, A. Noteq.a, B. Noteq.b, C. Noteq.c.

Alternatively, t+c=t-a-B, t+c=t-a-B.

Based on this arrangement, as shown in fig. 10, the noise 30 generated by the superposition of the first-type signal 21 and the second-type signal 22 is more dispersed, which is beneficial to further reducing the superposition of the noise 30 and the period S of the signal generated by the active pen, thereby being beneficial to further reducing the influence of the noise 30 on the active pen operation.

In one embodiment of the present application, the first non-fixed potential signal 20 includes a scan signal GOUT, and the touch display panel 01 further includes a plurality of sequentially transmitted clock signals CK, and an enable level signal (e.g., a high level signal) in the scan signal GOUT corresponds to an enable level signal (e.g., a high level signal) in at least a portion of the clock signals CK. The pulse width of the enable level signal in the clock signal CK may affect the pulse width of the enable level signal in the corresponding scan signal GOUT.

Alternatively, the enable level signal (e.g., high level signal) in the scan signal GOUT may project the enable level signal (e.g., high level signal) in each clock signal CK.

As shown in fig. 11, fig. 11 is a schematic diagram of a shift register circuit provided in an embodiment of the present application, the first signal transmission structure 10 includes a shift register circuit VSR, the shift register circuit VSR includes a plurality of cascaded shift register units VR, the plurality of shift register units VR may sequentially output scan signals SOUT for controlling a row of sub-pixels PX, respectively.

As shown in fig. 11, the shift register circuit VSR may be electrically connected to a plurality of clock signal lines CL. For example, one shift register unit VR may be electrically connected to two clock signal lines CL, wherein a signal transmitted by one clock signal line CL may be used as the reset signal SET of the shift register unit VR, a signal transmitted by the other clock signal line CL may be used as the clock signal CK of the shift register unit VR, and a scan signal output by the shift register unit VR may be mapped to the received clock signal CK.

As illustrated in fig. 11, the plurality of clock signal lines CL include a first clock signal line CL1, a second clock signal line CL2, a third clock signal line CL3, and a fourth clock signal line CL4, signals transmitted by the first clock signal line CL1, the second clock signal line CL2, the third clock signal line CL3, and the fourth clock signal line CL4 are sequentially used as reset signals SET of the respective shift register units VR, and signals transmitted by the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2 are sequentially used as clock signals CK of the respective shift register units VR.

As shown in fig. 12, fig. 12 is a schematic diagram of the correspondence between a clock signal and a scan signal according to an embodiment of the present application, the scan signal GOUT output by the shift register circuit VSR may sequentially project enable level signals (e.g., high level signals) in the clock signals CK transmitted by the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1 and the second clock signal line CL 2.

In the embodiment of the application, the scanning signal GOUT can comprise a plurality of different pulse width enabling level signals (such as high level signals) by setting different pulse width enabling level signals (such as high level signals) in different clock signals CK, so that the duty ratio of the scanning signal GOUT can be changed, the scanning signal GOUT comprises a plurality of different working frequencies, and the influence of noise generated by the scanning signal GOUT on the normal working of the driving pen is reduced.

Alternatively, the duty ratio of the same clock signal CK may be fixed to reduce the difficulty of controlling the clock signal CK. Of course, the duty ratio of the same clock signal CK may be set to be variable, so as to increase the period diversity of the scanning signal GOUT and further disperse the noise generated by the scanning signal GOUT.

Fig. 13 is a schematic diagram showing a correspondence between noise and an active pen signal according to another embodiment of the present application.

In an embodiment of the present application, as shown in fig. 13, a frame Z of the touch display panel 01 includes a plurality of clock signal cycle phases L, and each clock signal CK sequentially outputs an enable level signal (e.g., a high level signal) in one clock signal cycle phase L.

Illustratively, in one clock signal cycle stage L, the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2 sequentially transmit the enable level signal (e.g., the high level signal) in the clock signal CK.

In the clock signal cycle phase L, at least part of the clock signals CK have different pulse widths of the enable level signals (e.g., high level signals).

In the embodiment of the application, by setting different pulse widths of the enabling level signals (such as high level signals) in different clock signals CK, the scanning signal GOUT can comprise a plurality of enabling level signals (such as high level signals) with different pulse widths, so that the duty ratio of the scanning signal GOUT can be changed, the scanning signal GOUT comprises a plurality of different working frequencies, and the influence of noise generated by the scanning signal GOUT on the normal working of the active pen is reduced.

As shown in fig. 13, the first non-fixed potential signal 20 further includes a Data voltage signal Data, and in order to ensure the Data writing accuracy of the sub-pixels PX, an enable level signal (e.g., a high level signal) in the Data voltage signal Data is located in an enable level signal (e.g., a high level signal) of the corresponding scanning signal GOUT. The duty cycle of the Data voltage signal Data is the same as the duty cycle of the corresponding scan signal GOUT.

Optionally, the duty cycle of the active pen is T, and the pulse widths of the enable level signals (e.g., the high level signals) in the different clock signals CK may be set to be different, so that in the same clock signal cycle stage L, the duty cycle of the scan signal GOUT includes t+a, t+b, T-a-b, and a and b are all different from 0. The duty cycle of the Data voltage signal Data is correspondingly the same as the duty cycle of the scan signal GOUT. The duty cycle of the scan signal GOUT in the adjacent two clock signal cycle phases L may be T.

Optionally, the second type interval period gap is included between two adjacent clock signal cycle phases L, and in the frame Z, the duration of each second interval period gap is the same. So as to reduce the complexity of the first non-fixed potential signal 20, thereby reducing the control difficulty of the touch display panel 01.

Thus, the noise 30 generated by the Data voltage signal Data and the scanning signal GOUT is less overlapped with the period S of the working signal generated by the active pen, which is beneficial to improving the touch performance of the active pen.

Fig. 14 is a schematic diagram showing the correspondence between noise and active pen signals according to another embodiment of the present application.

In an embodiment of the present application, as shown in fig. 14, a frame Z of the touch display panel 01 includes a plurality of clock signal cycle phases L, and each clock signal CK sequentially outputs an enable level signal (e.g., a high level signal) in one clock signal cycle phase L.

Illustratively, in one clock signal cycle stage L, the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2 sequentially transmit the enable level signal (e.g., the high level signal) in the clock signal CK.

The two adjacent clock signal circulation phases L comprise second type interval periods gap, and at least part of the second type interval periods gap are different in duration.

As shown in fig. 14, the plurality of clock signal cycle phases L include a first clock signal cycle phase L1, a second clock signal cycle phase L2, and a third clock signal cycle phase L3, which are sequentially performed, a frame Z of the touch display panel 01 includes a plurality of interval periods gap of a second type, the plurality of interval periods gap of the second type include interval periods gap1 and interval periods gap2, the interval periods gap1 are located between the first clock signal cycle phase L1 and the second clock signal cycle phase L2, the interval periods gap2 are located between the second clock signal cycle phase L2 and the third clock signal cycle phase L3, and the duration of the interval periods gap1 and the interval periods gap2 are different.

In the embodiment of the application, by setting at least part of the second type interval period gap to be different in duration, the scanning signal GOUT can be made to be a variable duty ratio among a plurality of clock signal circulation phases L in one frame of picture Z, which is beneficial to reducing the influence of noise on the working of the active pen by changing the working frequency of the clock signal circulation phases L so that the noise generated by the scanning signal GOUT and the period S of the working signal generated by the active pen are overlapped less in at least part of the clock signal circulation phases L.

Alternatively, as shown in fig. 14, in the same clock signal cycle phase L, the pulse widths of the enable level signals (e.g., high levels) in the clock signals CK are the same, and the scan signal GOUT may have a fixed duty cycle in one clock signal cycle phase L. At this time, even if the period S of the active pen generating signal overlaps more noise generated by the scanning signal GOUT in one clock signal cycle stage L, the period S of the active pen generating signal is dislocated with the noise 30 generated by the scanning signal GOUT in the other clock signal cycle stage L because the period of the second type interval period gap between at least part of adjacent two clock signal cycle stages L is different, the overlapping of the noise 30 and the period S of the active pen generating signal can be greatly reduced, so that the influence of the noise 30 on the active pen operation is reduced.

As shown in fig. 14, the period of the scan signal GOUT between the first clock signal cycle stage L1 and the second clock signal cycle stage L2 is t+a, the period of the scan signal GOUT between the second clock signal cycle stage L2 and the third clock signal cycle stage L3 is T-a, and the scan signal GOUT has a bit difference between the different clock signal cycle stages L. It is assumed that in the same clock signal cycle phase L, the duty cycle of the scan signal GOUT is the same as the duty cycle of the active pen, for example, the duty cycles of both are T. Even if the period S of the active pen generating signal overlaps more with the noise generated by the scanning signal GOUT in the clock signal cycle stage L, for example, the period S of the active pen generating signal overlaps more with the noise 30 generated by the scanning signal GOUT in the first clock signal cycle stage L1, but because of the bit difference between the different clock signal cycle stages L, the period S of the active pen generating signal is dislocated with the noise 30 generated by the scanning signal GOUT in the second clock signal cycle stage L2 and the third clock signal cycle stage L3, so that the influence of the noise 30 on the active pen operation is reduced.

In addition, in the same clock signal cycle stage L, the pulse widths of the enable level signals (such as high level) in the clock signals CK are set to be the same, which is also beneficial to reducing the complexity of the clock signals CK and reducing the control difficulty of the touch display panel 01.

Alternatively, in the same clock signal cycle stage L, it is also possible to set the pulse width of the enable level signal (e.g., high level) to be different in at least part of the clock signals CK. Thus, the noise 30 generated by the scanning signal GOUT is more dispersed, so that the overlapping of the noise 30 and the period S of the signal generated by the active pen is further reduced, and the influence of the noise 30 on the operation of the active pen is reduced.

In one embodiment of the present application, the touch display panel 01 further includes a normal display mode, in which the first non-fixed potential signal 20 is a fixed duty cycle signal.

In the normal display mode and the active pen touch mode, the refresh frequency of the touch display panel 01 is the same. Here, the refresh frequency of the touch display panel 01 is the same, which means that the total number of times the first non-fixed potential signal 20 transmits the enable level signal is the same within a certain period

For example, in the normal display mode and the active pen touch mode, the total number of times the first non-fixed potential signal 20 transmits the enable level signal within one frame of the picture Z is the same.

In the embodiment of the application, the refresh frequency of the touch display panel 01 in the conventional display mode and the active pen touch mode is set to be the same, so that the display difference of the touch display panel 01 in the conventional display mode and the active pen touch mode is reduced, and the user experience is improved.

Optionally, in the active pen touch mode, as shown in fig. 3 and 4, the total duration of the enable level signal VH and the non-enable level signal VL in the first non-fixed potential signal 20 is a fixed value.

Based on this arrangement, in the active pen touch mode, the duty cycle of the first non-fixed potential signal 20 is flexibly adjusted, so as to reduce the influence of noise on the normal operation of the active pen to a greater extent. Meanwhile, the display duration and the refresh frequency of the touch display panel 01 in a certain period are unchanged, and the display effect in the active pen touch mode is ensured.

Fig. 15 is a schematic diagram of a touch display device according to an embodiment of the application.

An embodiment of the present application provides a touch display device 02, as shown in fig. 15, where the touch display device 02 includes a touch display panel 01 provided in the above embodiment. The touch display device 02 may be an electronic device such as a mobile phone, a tablet computer, a learning machine, and the like, which is not particularly limited in the present application.

In the touch display device 02, the duty ratio of the first non-fixed potential signal 20 for displaying is set to be variable, so that the frequency of noise generated by the first non-fixed potential signal 20 can be changed by adjusting the duty ratio of the first non-fixed potential signal 20, which is favorable for making the frequency of noise generated by the first non-fixed potential signal 20 different from the working frequency of the active pen, thereby being favorable for reducing the overlapping of the noise and the working period of the active pen, reducing the influence of the noise on the working of the active pen, and further being favorable for improving the touch performance of the active pen in the active pen touch mode of the touch display panel 01.

Fig. 16 is a schematic diagram of a touch system according to an embodiment of the present application.

As shown in fig. 16, an embodiment of the present application provides a touch system 100, where the touch system 100 includes a touch display device 02 and an active pen 03, the active pen 03 can send electromagnetic signals or other wireless signals to a touch display panel 01 in the touch display device 02, and after the touch display panel 01 receives and analyzes the signals sent by the active pen, the touch display panel can have different functions, for example, a writing function or an erasing function.

In the touch system 100, the duty ratio of the first non-fixed potential signal 20 for displaying is set to be variable, so that the frequency of the noise generated by the first non-fixed potential signal 20 can be changed by adjusting the duty ratio of the first non-fixed potential signal 20, which is favorable for making the frequency of the noise generated by the first non-fixed potential signal 20 different from the working frequency of the active pen 03, thereby being favorable for reducing the overlapping of the noise and the working period of the active pen 03, reducing the influence of the noise on the working of the active pen 03, and further being favorable for improving the touch performance of the active pen 03 in the active pen touch mode of the touch display panel 01.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.

Claims (16)

1. A touch display panel, characterized in that it comprises a first signal transmission structure, wherein the first signal transmission structure is used to transmit a first non-fixed potential signal, and the first non-fixed potential signal is a display signal; The touch display panel includes an active pen touch mode. In the active pen touch mode, the duty cycle of the first non-fixed potential signal is variable. 2. The touch display panel according to claim 1, wherein within one frame of the touch display panel, the first non-fixed potential signal comprises a plurality of enable level signals and a plurality of non-enable level signals; Wherein, at least some of the enable level signals have different pulse widths. 3 . The touch display panel according to claim 2 , wherein within a frame of the touch display panel, pulse widths of at least some of the non-enable level signals are different. 4. The touch display panel according to claim 1, wherein within one frame of the touch display panel, the first non-fixed potential signal comprises a plurality of enable level signals and a plurality of non-enable level signals; The pulse widths of the enable level signals are the same, and the pulse widths of at least some of the disable level signals are different. 5 . The touch display panel according to claim 1 , wherein a first type of interval period is included between two adjacent display frames, and in the active pen touch mode, at least some of the first type of interval periods have different durations. 6 . The touch display panel according to claim 5 , wherein within one frame of the touch display panel, the duty cycle of the first non-fixed potential signal is fixed or variable. 7. The touch display panel according to claim 1 is characterized in that the first signal transmission structure includes a first type of signal transmission structure and a second type of signal transmission structure, the first non-fixed potential signal includes a first type of signal and a second type of signal, the first type of signal transmission structure is used to transmit the first type of signal, and the second type of signal transmission structure is used to transmit the second type of signal. 8. The touch display panel according to claim 7, wherein the first type of signal and the second type of signal are arranged correspondingly, and the enable level signal in the first type of signal at least partially overlaps with the enable level signal in the second type of signal; In one frame of the touch display panel, the first type of signal includes a plurality of first sub-periods, and the second type of signal includes a plurality of second sub-periods; Among them, at least part of the first sub-periods has a different duration from the corresponding second sub-periods. 9 . The touch display panel according to claim 7 , wherein the first type of signal is a data voltage signal, and the second type of signal is a scan signal. 10. The touch display panel according to claim 1 is characterized in that the first non-fixed potential signal includes a scan signal, the touch display panel also includes a plurality of clock signals transmitted sequentially, and the enable level signal in the scan signal corresponds to the enable signal in at least part of the clock signal. 11. The touch display panel according to claim 10, characterized in that one frame of the touch display panel includes a plurality of clock signal cycle stages, and in one of the clock signal cycle stages, each of the clock signals sequentially outputs an enable level signal; Wherein, within a cycle phase of the clock signal, the pulse widths of the enable level signals in at least some of the clock signals are different. 12. The touch display panel according to claim 10, characterized in that one frame of the touch display panel includes a plurality of clock signal cycle stages, and in one of the clock signal cycle stages, each of the clock signals sequentially outputs an enable level signal; Wherein, a second type of interval period is included between two adjacent clock signal cycle phases, and at least some of the second type of interval periods have different durations. 13. The touch display panel according to claim 1, characterized in that the touch display panel further comprises a normal display mode, in which the first non-fixed potential signal is a fixed duty cycle signal; In the normal display mode and the active pen touch mode, the refresh frequency of the touch display panel is the same. 14 . The touch display panel according to claim 1 , wherein in the active pen touch mode, a total duration of the enable level signal and the non-enable level signal in the first non-fixed potential signal is a fixed value. 15. A touch display device, characterized by comprising the touch display panel according to any one of claims 1 to 14. 16 . A touch control system, comprising the touch control display device as claimed in claim 15 and an active pen.