WO2019019322A1 - Touch control display panel and display method and display device therefor - Google Patents

Abstract

A touch control display panel and a display method and a display device therefor, the display method comprising: when a touch control display panel is in a display stage, a common electrode (705) drives a pixel electrode (704) by means of a first direct current voltage; it is detected whether the amount of electric charge accumulated on one side corresponding to the common electrode (705) exceeds a preset threshold; and if yes, the common electrode (705) drives the touch control display panel by means of a second direct current voltage in the next display stage, wherein the amount of electric charge generated by the difference value between the second direct current voltage and the first direct current voltage in the display stage is the same as that accumulated by the common electrode (705), and the polarity is opposite. By means of the described display method, residual images of a liquid crystal display device may be eliminated, and the display quality may be improved.

Description

Touch display panel, display method thereof, and display device

[Technical Field]

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

 【Background technique】

The afterimage is a common phenomenon in the display of the touch display panel, and it is also a very important test link in the reliability test. Usually, afterimages can be divided into long-term afterimages and short-term afterimages, and the physical mechanisms of their occurrence are not the same. The most common ones are long-term afterimages. Long-term afterimages are caused by DC residuals.

In the manufacturing process of liquid crystal, liquid crystal molecules cannot be completely purified due to changes in the process environment and conditions, resulting in some mobile ions remaining in the liquid crystal molecules. When a voltage is applied, these movable ions move toward an electrode under the action of an applied electric field until the liquid crystal molecules move to the interface of the alignment film and are finally trapped at the interface, and these charged ions significantly affect the original. The applied electric field causes the common voltage to change, so that the AC voltage actually applied to the pixel electrode is asymmetric, thereby forming an additional electric field, thereby causing an image sticking phenomenon and reducing the display quality of the touch display panel. As shown in Figure 1 and Figure 2. FIG. 1 is a schematic diagram of driving sequence of a touch display panel in the prior art. As shown in FIG. 1, the common electrode voltage is a constant DC voltage in the display timing phase, that is, a voltage difference formed between the liquid crystal layer and the pixel electrode, thereby being used for gray scale display; and the common electrode voltage is an AC square wave in the touch scanning phase. Its role is for touch panel scanning.

Due to the presence of an additional electric field, the voltage at the common electrode terminal changes. Assume that the preset common voltage value is VCOM1. When positive ions are accumulated on the VCOM electrode, the common voltage value at this time becomes larger, and the changed common voltage is VCOM3, that is, VCOM3>VCOM1; when negative ions are accumulated on the common electrode, the common voltage value at this time becomes small, and the common voltage after the change is VCOM2, that is, VCOM2<VCOM1.

Therefore, it is necessary to propose a method for improving the afterimage of the touch display panel to solve the above technical problem.

 [Summary of the Invention]

An object of the present invention is to provide a display method for a touch display panel, which solves the technical problem that the touch display panel is prone to residual images in the prior art, resulting in poor display quality.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a display method of a touch display panel, the touch display panel includes a plurality of pixel electrodes, and one end of the pixel electrode is connected to the touch a thin film transistor output end of the display panel, the other end of the pixel electrode is connected to the common electrode, the thin film transistor input end is connected to the data line, and the control end of the thin film transistor is connected to the scan line, the display method The method includes: when the touch display panel is in a display phase, the common electrode drives the pixel electrode by using a first DC voltage; and detecting whether the amount of charge accumulated on a side corresponding to the common electrode exceeds a preset threshold; The amount of charge accumulated on one side of the common electrode exceeds the predetermined threshold, and the common electrode drives the touch display panel by a second DC voltage in a next display phase, wherein the second DC voltage a difference between the first DC voltage and the amount of charge generated in the display phase and the accumulated electricity of the common electrode The amount of the same amount, and opposite polarity.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a touch display panel, which includes an array substrate, a color filter substrate, and an array substrate and a substrate disposed opposite to each other. a liquid crystal layer between the color filter substrates; the array substrate includes a plurality of pixel electrodes, one end of the pixel electrode is connected to a thin film transistor output end of the touch display panel, and the other end of the pixel electrode is connected to a common An electrode, the thin film transistor input end is connected to the data line, the control end of the thin film transistor is connected to the scan line, the touch display panel further includes a control circuit and a driving circuit, and a segment of the driving circuit is connected to the control a further circuit connected to the common electrode; the driving circuit, when the control circuit detects that the touch display panel is in the display phase, outputs a first DC voltage to the common electrode to drive the pixel electrode; The control circuit, when the control circuit detects that the amount of charge accumulated on the side corresponding to the common electrode exceeds a preset threshold Outputting a second DC voltage to the common electrode to drive the pixel electrode in a next display phase; wherein a difference between the second DC voltage and the first DC voltage is generated by the amount of charge generated during the display phase The amount of charge accumulated by the common electrode is the same and the polarity is opposite.

To solve the above technical problem, another technical solution adopted by the present invention is to provide a touch display device, which includes the above touch display panel to implement the steps in the above method.

The beneficial effects of the present invention are: different from the prior art, the present invention changes the common electrode voltage of a constant DC voltage in the display phase, and neutralizes the accumulated charge on the side of the common electrode by continuously changing the voltage, thereby improving the touch display. The residual image of the panel improves the display quality.

 [Description of the Drawings]

1 is a schematic diagram of driving sequence of a touch display panel in the prior art;

2 is a schematic diagram of DC residual on a common voltage in the prior art;

3 is a schematic flow chart of an embodiment of a display method of a touch display panel provided by the present invention;

4 is a schematic diagram of an embodiment of a display method of a touch display panel provided by the present invention;

5 is a schematic diagram of another embodiment of a display method of a touch display panel provided by the present invention;

6 is a schematic structural diagram of an embodiment of a touch display panel provided by the present invention;

FIG. 7 is a schematic diagram showing the circuit connection of an embodiment of the touch display panel provided by the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings in order to make the technical solutions, the technical solutions, and the technical effects achieved by the present invention.

Referring to FIG. 3, FIG. 3 is a schematic flow chart of an embodiment of a display method of a touch display panel provided by the present invention.

The touch display panel is an In-cell touch display panel.

The touch display panel includes a plurality of pixel electrodes, one end of the pixel electrode is connected to the thin film transistor output end of the touch display panel, the other end of the pixel electrode is connected to the common electrode, and the thin film transistor input terminal is connected To the data line, the control terminal of the thin film transistor is connected to the scan line.

The display method of this embodiment includes the following steps:

Step 301: When the touch display panel is in the display phase, the common electrode drives the pixel electrode by using a first DC voltage.

The touch display panel integrates the touch electrode with the touch function and the pixel electrode with the display function, and realizes the dual functions of touch and display through time division multiplexing. And the driving voltage and type required for the touch function and the display function are different. In order to ensure that the voltage difference across the pixel electrode is equal, in the display phase, generally driven by a stable DC voltage, correspondingly, the common electrode terminal also needs a stable DC voltage to drive.

In a specific implementation scenario of the embodiment, the first DC voltage is VCOM1, that is, the pixel electrode is driven by a common voltage of VCOM1.

Step 302: Detect whether the amount of charge accumulated on a side corresponding to the common electrode exceeds a preset threshold.

Step 303: If the amount of charge accumulated on the side corresponding to the common electrode exceeds the preset threshold, the common electrode drives the touch display panel through the second DC voltage in the next display stage, where The difference between the second DC voltage and the first DC voltage is the same as the amount of charge accumulated in the display electrode and the amount of charge accumulated in the common electrode, and the polarity is opposite.

In a large number of specific display operations, it is found that the charge is formed by accumulating for a period of time. During a period of time, the charge backlog is not too obvious. In order to ensure the display quality, the compensation efficiency is further improved, and resources are saved. The embodiment counts the amount of charge accumulated on one side of the common electrode, and starts the compensation measure when the preset threshold is exceeded.

In a specific implementation scenario, the current does not change significantly when the general driving voltage is constant, because the amount of charge accumulated on the side corresponding to the common electrode can be determined by time. Specifically, the touch display panel determines whether the current common electrode drives the pixel electrode by the first DC voltage for more than a preset time. If the preset time is exceeded, it may be determined that the amount of charge accumulated on the side corresponding to the common electrode exceeds a preset threshold.

The common electrode drives the touch display panel by a second DC voltage in a next display phase, wherein a difference between the second DC voltage and the first DC voltage is generated by the amount of charge generated during the display phase. The amount of charge accumulated by the common electrode is the same and the polarity is opposite.

The preset time is 1 second, and may be other values in other cases, such as 0.5 seconds, 1.5 seconds, and the like.

In another specific implementation scenario, the current does not change significantly when the driving voltage is constant, because the amount of charge accumulated on the side corresponding to the common electrode can be determined by time. Under the condition that the driving frequency of the data line is constant, the frequency of image frame display or switching does not change, and the number of image frames displayed in the predetermined time is also fixed. Therefore, it is also possible to determine whether the amount of charge accumulated on one side of the common electrode exceeds a preset threshold by counting the number of frames of the displayed image.

Specifically, when the common electrode drives the pixel electrode by using the first DC voltage, it is determined whether the number of frames of the image displayed by the touch display panel reaches a preset amount. If the number of frames of the image displayed by the touch display panel reaches a preset amount, it is determined that the amount of charge accumulated on the side corresponding to the common electrode exceeds a preset threshold.

If the amount of charge accumulated on the side corresponding to the common electrode exceeds the predetermined threshold, the common electrode drives the touch display panel by the second DC voltage in the next display stage.

The preset frame number is 60 frames, and may be other values in other cases, such as 80 frames, 120 frames, and the like.

In any of the above embodiments, if the charge accumulated on the corresponding side of the common electrode is a positive charge, the value of the first DC voltage is increased, and the changed voltage value is VCOM3, as shown in FIG. That is, the first DC voltage value is changed from VCOM1 to VCOM3 after the positive charge is accumulated in the display phase. In order to neutralize the positive charge accumulated on the common electrode, the common electrode drives the touch display panel through a second DC voltage that is less than the first DC voltage in the next display phase.

The difference between the second DC voltage and the first DC voltage is the same as the amount of charge generated by the common electrode in the display phase.

For example, as shown in FIG. 4, when the touch display panel is in the display phase, the common electrode drives the pixel electrode through the first DC voltage VCOM1.

If the charge accumulated on the corresponding side of the common electrode is a positive charge, determine whether the current time at which the common electrode drives the pixel electrode through the first DC voltage VCOM1 exceeds a preset time of 1 second; or judge current When the common electrode drives the pixel electrode through the first DC voltage VCOM1, the touch display panel displays whether the number of frames of the image reaches a preset amount of 60 frames.

If the common electrode drives the pixel electrode through the first DC voltage VCOM1 for more than a predetermined time, or the common electrode drives the pixel electrode through the first DC voltage VCOM1, the touch Controlling the display panel to display the number of frames of the image reaches a preset amount of 60 frames, and the common electrode drives the touch display panel by a second DC voltage VCOM2 that is smaller than the first DC voltage in the next display phase, wherein the The difference between the two DC voltages VCOM2 and the voltage of the first direct current VCOM1 is the same as the amount of charge accumulated in the display phase and the amount of charge accumulated by the common electrode, and the polarities are opposite.

It can be seen from the above description that the display method of the touch display panel provided by the present invention is to change the common electrode voltage of the DC voltage at the display stage to be constant, and to neutralize the common voltage by lowering the common voltage in the next display stage after the preset time or the number of frames. The positive charge accumulated on one side of the electrode improves the residual image of the touch display panel and improves the display quality.

In any of the above embodiments, if the charge accumulated on the corresponding side of the common electrode is a negative charge, the value of the first DC voltage is reduced, and the changed voltage value is VCOM2, as shown in FIG. . That is, the first DC voltage value is changed from VCOM1 to VCOM2 after the positive charge is accumulated in the display phase. In order to neutralize the accumulated negative charge on the common electrode, the common electrode drives the touch display panel through a second DC voltage greater than the first DC voltage in the next display phase.

The difference between the second DC voltage and the first DC voltage is the same as the amount of charge generated by the common electrode in the display phase.

For example, as shown in FIG. 5, when the touch display panel is in the display phase, the common electrode drives the pixel electrode through the first DC voltage VCOM1.

If the charge accumulated on the corresponding side of the common electrode is a negative charge, determining whether the current time that the common electrode drives the pixel electrode by the first DC voltage VCOM1 exceeds a preset time of 1 second; or determining the current When the common electrode drives the pixel electrode through the first DC voltage VCOM1, the touch display panel displays whether the number of frames of the image reaches a preset amount of 60 frames.

If the common electrode drives the pixel electrode through the first DC voltage VCOM1 for more than a predetermined time, or the common electrode drives the pixel electrode through the first DC voltage VCOM1, the touch Controlling the display panel to display the number of frames of the image reaches a preset amount of 60 frames, and the common electrode drives the touch display panel by a second DC voltage VCOM2 greater than the first DC voltage in the next display phase, wherein the The difference between the two DC voltages VCOM2 and the voltage of the first direct current VCOM1 is the same as the amount of charge accumulated in the display phase and the amount of charge accumulated by the common electrode, and the polarities are opposite.

It can be seen from the above description that the display method of the touch display panel provided by the present invention is to change the common electrode voltage of the DC voltage at the display stage to be constant, and to neutralize the common voltage by increasing the common voltage in the next display stage after the preset time or the number of frames. The accumulated negative charge on the electrode side improves the residual image of the touch display panel and improves the display quality.

In any of the above embodiments, when the touch display panel is in the touch phase, the common electrode drives the display electrode by setting a square wave voltage.

It can be seen from the above description that the display method of the touch display panel provided by the present invention is to change the common electrode voltage of a constant DC voltage in the display phase, and to improve the touch display panel by continuously changing the voltage to neutralize the accumulated charge on the side of the common electrode. Afterimage, improve display quality.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of an embodiment of a touch display panel according to the present invention. In this embodiment, as shown in FIG. 6 , the touch display panel provided by the present invention includes an array substrate 603 , a color filter substrate 601 , and a liquid crystal 602 disposed between the array substrate 603 and the color filter substrate 601 . Floor. For a clear description of the operation of the touch display panel, reference is made to FIG. 7 and FIG. 7 is a schematic diagram of circuit connection of an embodiment of the touch display panel provided by the present invention.

The touch display panel further includes a data line 701, a scan line 702, a thin film transistor 703, a pixel electrode 704, and a common electrode 705, and one end of the pixel electrode 704 is connected to an output end of the thin film transistor 703, The other end of the pixel electrode 704 is connected to the common electrode 705, the input end of the thin film transistor 703 is connected to the data line 701, and the control end of the thin film transistor 703 is connected to the scan line 702; the touch display panel further includes a control circuit 707 and a driving circuit 706, a segment of the driving circuit 706 is connected to the control circuit 707, and another segment is connected to the common electrode 705.

The driving circuit 706 outputs a first DC voltage to the common electrode to drive the pixel electrode when the control circuit 707 detects that the touch display panel is in the display phase; the control circuit 707 is in the control circuit 707. When it is detected that the amount of charge accumulated on the corresponding side of the common electrode 705 exceeds a preset threshold, a second DC voltage is output to the common electrode 705 to drive the pixel electrode 704 in the next display phase.

The difference between the second DC voltage and the first DC voltage is the same as the amount of charge accumulated by the common electrode 705, and the polarity is opposite.

Wherein, if the charge accumulated on the corresponding side of the common electrode 705 is a positive charge, the common electrode 705 drives the touch display panel by a second DC voltage smaller than the first DC voltage in the next display stage. And wherein the difference between the second DC voltage and the first DC voltage is the same as the amount of charge generated by the common electrode 705 during the display phase.

If the charge accumulated on the corresponding side of the common electrode is a negative charge, the common electrode 705 drives the touch display panel by a second DC voltage greater than the first DC voltage in the next display stage; The difference between the second DC voltage and the first DC voltage is the same as the amount of charge generated by the common electrode 705 during the display phase.

The driving circuit 706 outputs a set square wave voltage to the common electrode 705 to drive the pixel electrode 704 when the control circuit detects that the touch display panel is in the touch phase.

It can be seen from the above description that, unlike the prior art, the touch display panel provided by the present invention is a common electrode voltage that changes a DC voltage at a constant display stage, and the charge accumulated on the side of the common electrode is continuously changed by changing the voltage to improve the touch. Control the residual image of the display panel to improve the display quality.

The present invention further provides a touch display device comprising the above touch display panel to implement the steps in the above display method.

It can be seen from the above description that, unlike the prior art, the touch display device provided by the present invention changes the common electrode voltage of a constant DC voltage during the display phase, and neutralizes the accumulated charge on the side of the common electrode by continuously changing the voltage, thereby improving the touch. Control the residual image of the display panel to improve the display quality.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (20)

1. A display method of a touch display panel, the touch display panel includes a plurality of pixel electrodes, one end of the pixel electrode is connected to a thin film transistor output end of the touch display panel, and the other end of the pixel electrode Connected to the common electrode, the thin film transistor input terminal is connected to the data line, and the control end of the thin film transistor is connected to the scan line, wherein the display method comprises:

   When the touch display panel is in the display phase, the common electrode drives the pixel electrode by using a first DC voltage;

   Detecting whether the amount of charge accumulated on a side corresponding to the common electrode exceeds a preset threshold;

   If the amount of charge accumulated on one side of the common electrode exceeds the predetermined threshold, the common electrode drives the touch display panel by a second DC voltage in a next display stage, wherein the second DC The difference between the voltage and the first DC voltage is the same amount of charge generated in the display phase as the amount of charge accumulated by the common electrode, and the polarity is opposite.
2. The display method according to claim 1, wherein the step of detecting whether the amount of charge accumulated on the side corresponding to the common electrode exceeds a preset threshold comprises:

   Determining whether the current time that the common electrode drives the pixel electrode by the first DC voltage exceeds a preset time;

   The step of driving the touch display panel by the second DC voltage in the next display stage if the amount of charge accumulated on the side corresponding to the common electrode exceeds the predetermined threshold:

   And if the common electrode drives the pixel electrode by the first DC voltage for more than the preset time, the common electrode drives the touch display panel by a second DC voltage in a next display phase .
3. The display method according to claim 2, wherein the preset time is 1 second.
4. The display method according to claim 1, wherein the step of detecting whether the amount of charge accumulated on the side corresponding to the common electrode exceeds a preset threshold comprises:

   When the common electrode drives the pixel electrode by using the first DC voltage, determining whether the number of frames of the display image of the touch display panel reaches a preset amount;

   The step of driving the touch display panel by the second DC voltage in the next display stage if the amount of charge accumulated on the side corresponding to the common electrode exceeds the predetermined threshold:

   And if the number of the frames reaches a preset amount, the common electrode drives the touch display panel by a second DC voltage in a next display stage.
5. The display method according to claim 4, wherein the predetermined number of frames is 60 frames.
6. The display method of claim 1, wherein the step of driving the touch display panel by the second DC voltage in the next display stage comprises:

   If the amount of charge accumulated on the corresponding side of the common electrode exceeds a preset threshold and is a positive charge, the common electrode displays the touch display by a second DC voltage that is less than the first DC voltage in the next display stage. The panel is driven, wherein a difference between the second DC voltage and the first DC voltage is the same amount of charge generated in the display phase as the amount of charge accumulated by the common electrode;

   If the amount of charge accumulated on the corresponding side of the common electrode exceeds a preset threshold and is a negative charge, the common electrode displays the touch display by a second DC voltage greater than the first DC voltage in the next display phase. The panel is driven; wherein a difference between the second DC voltage and the first DC voltage is the same amount of charge generated in the display phase as the amount of charge accumulated by the common electrode.
7. The display method according to claim 1, wherein the display method further comprises:

   When the touch display panel is in the touch phase, the common electrode drives the display electrode by setting a square wave voltage.
8. A touch display panel includes an array substrate, a color filter substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate; the array substrate includes a plurality of pixels An electrode, one end of the pixel electrode is connected to the scan line of the touch display panel, and the other end of the pixel electrode is connected to the common electrode, wherein the touch display panel further includes a control circuit and a driving circuit. One segment of the driving circuit is connected to the control circuit, and another segment is connected to the common electrode;

   The driving circuit outputs a first DC voltage to the common electrode to drive the pixel electrode when the control circuit detects that the touch display panel is in the display phase; and the control circuit detects the location in the control circuit When the amount of charge accumulated on one side of the common electrode exceeds a preset threshold, outputting a second DC voltage to the common electrode to drive the pixel electrode in the next display stage;

   The difference between the second DC voltage and the first DC voltage is the same as the amount of charge accumulated in the display electrode and the amount of charge accumulated in the common electrode, and the polarity is opposite.
9. The touch display panel of claim 8, wherein the control circuit is configured to determine whether a time during which the common electrode drives the pixel electrode by the first DC voltage exceeds a preset time; The driving circuit is specifically configured to: when the common electrode drives the pixel electrode by the first DC voltage for more than the preset time, display the touch display by using a second DC voltage in a next display phase The panel is driven.
10. The touch display panel according to claim 9, wherein the preset time is 1 second.
11. The touch display panel of claim 8, wherein the control circuit is configured to determine that the control circuit determines that the common electrode drives the pixel electrode by the first DC voltage The touch display panel displays whether the number of frames of the image reaches a preset amount;

    The driving circuit is configured to: when the number of frames of the common electrode driving the pixel electrode by the first DC voltage reaches a preset amount, display the touch display by using a second DC voltage in a next display phase The panel is driven.
12. The touch display panel of claim 11, wherein the preset number of frames is 60 frames.
13. The touch display panel according to claim 8, wherein the driving circuit is specifically configured to: when the amount of charge accumulated on a side corresponding to the common electrode is detected exceeds a preset threshold, and the side corresponding to the common electrode When the accumulated charge is a positive charge, the touch display panel is driven by a second DC voltage that is less than the first DC voltage in a next display phase, wherein the second DC voltage and the first DC voltage The difference in the amount of charge generated in the display phase is the same as the amount of charge accumulated in the common electrode;

    The driving circuit is specifically configured to: when the amount of charge accumulated on the side corresponding to the common electrode is greater than a preset threshold, and the charge accumulated on the side corresponding to the common electrode is a negative charge, the driving circuit is next time The display stage drives the touch display panel by a second DC voltage greater than the first DC voltage; wherein a difference between the second DC voltage and the first DC voltage is generated during the display phase The amount of charge is the same as the amount of charge accumulated by the common electrode.
14. The touch display panel of claim 8 , wherein the driving circuit outputs a set square wave voltage to the common electrode to drive the touch when the control circuit detects that the touch display panel is in the touch phase Pixel electrode.
15. a touch display device, the touch display panel of the touch display device includes an array substrate, a color filter substrate, and a liquid crystal layer disposed between the array substrate and the color filter substrate; The array substrate includes a plurality of pixel electrodes, one end of the pixel electrode is connected to the scan line of the touch display panel, and the other end of the pixel electrode is connected to the common electrode, wherein the touch display panel further includes a control a circuit and a driving circuit, a section of the driving circuit is connected to the control circuit, and another segment is connected to the common electrode;

    The driving circuit outputs a first DC voltage to the common electrode to drive the pixel electrode when the control circuit detects that the touch display panel is in the display phase; and the control circuit detects the location in the control circuit When the amount of charge accumulated on one side of the common electrode exceeds a preset threshold, outputting a second DC voltage to the common electrode to drive the pixel electrode in the next display stage;

    The difference between the second DC voltage and the first DC voltage is the same as the amount of charge accumulated in the display electrode and the amount of charge accumulated in the common electrode, and the polarity is opposite.
16. The touch display device of claim 15 , wherein the driving circuit outputs a set square wave voltage to the common electrode to drive the touch when the control circuit detects that the touch display panel is in the touch phase Pixel electrode.
17. The touch display device according to claim 15, wherein the control circuit is specifically configured to determine whether a time during which the common electrode drives the pixel electrode by the first DC voltage exceeds a preset time; The driving circuit is specifically configured to: when the common electrode drives the pixel electrode by the first DC voltage for more than the preset time, display the touch display by using a second DC voltage in a next display phase The panel is driven.
18. The touch display device according to claim 17, wherein the preset time is 1 second.
19. The touch display device according to claim 15, wherein the control circuit is specifically configured to determine that the control circuit determines that the common electrode drives the pixel electrode through the first DC voltage The touch display panel displays whether the number of frames of the image reaches a preset amount;

    The driving circuit is configured to: when the number of frames of the common electrode driving the pixel electrode by the first DC voltage reaches a preset amount, display the touch display by using a second DC voltage in a next display phase The panel is driven.
20. The touch display device according to claim 19, wherein the preset number of frames is 60 frames.