CN107452310A - touch display driver and driving method thereof - Google Patents

Abstract

The invention provides a touch display driver and a driving method thereof. The touch display driver includes a control circuit, a gate drive circuit and a touch detection circuit. The control circuit divides each of the plurality of frame periods into a plurality of screen display action intervals and a plurality of touch sensing action intervals. The gate driving circuit sequentially drives the gate driving lines of the in-cell touch display panel in each screen display operation interval to perform the screen display operation. The touch detection circuit performs touch sensing action in the touch sensing action interval. The control circuit controls the gate drive circuit to drive different numbers of gate drive lines in the initial picture display action interval of each frame period, so that when the picture display action interval of these frame periods ends, the gate drive circuit stops driving. on different gate drive lines. Thereby, the present invention can reduce the impact of horizontal stripe visual effects on image display quality.

Description

Touch display driver and its driving method

technical field

The invention relates to a touch display technology, and in particular to a touch display driver and a driving method thereof which can improve the image quality of an embedded touch display panel.

Background technique

Generally speaking, the in-cell touch display panel integrates the touch elements in the production of the display panel, and realizes the touch function and the display function through time-sharing driving. Time-driven is to time-share the screen display action and touch sensing action in a frame period. However, in the general time-sharing driving method, when the touch sensing action is performed to temporarily interrupt the screen display action, in each frame period, the time point of the interrupt screen display action or the time point corresponding to the interrupt screen display action The positions of the gate driving lines of the in-cell touch display panel are all fixed, so the visual effect of horizontal lines is prone to occur. For example, as shown in FIG. 1, the in-cell touch display panel 900 appears when the screen is displayed The multiple horizontal lines 910.

For example, in each frame period (including frame periods FP1, FP2, . . . , FPy) shown in FIG. The 1st to nth gate driving lines G1-Gn are used for screen display operation, and then the touch sensing operation of the in-cell touch display panel 900 can be performed in the touch sensing operation interval TP_A, and then the screen display operation In the interval DP_B, the (n+1)th to 2nth gate driving lines G(n+1)-G2n of the in-cell touch display panel 900 are sequentially driven to perform screen display operations, and continue to touch sensing Action interval, and so on until one frame period is scanned, where n and y are positive integers. Because in each frame period (including frame periods FP1, FP2, ..., FPy), the gate drive lines corresponding to the interruption of the screen display action due to the touch sensing action fall on the nth line and its multiples On the gate driving lines Gn, G2n, ..., therefore, for example, the pixel unit on the nth gate driving line Gn and the (n+1)th gate driving line G(n+1) (by the sub-pixel The luminance presented by the units R, G, and B) will be slightly different from the luminance presented by the pixel units on the other gate driving lines. By analogy, the (multiple of n) gate driving line and the (multiple of n+1) gate driving line will have the same situation. In this way, it can be observed that the touch display panel 900 has The phenomenon of multiple horizontal stripes 910.

In addition, in each frame period (including frame periods FP1, FP2, . , all of which are the gate drive lines Gn, G2n, ... which are nth and its multiples, interrupting the screen display operation, so the gate drive lines Gn, G2n, ... corresponding to the nth and multiples of the in-cell touch display panel Some transistor elements in the gate drive circuit (such as Gate driver on Array, GOA) will be degraded by high voltage for a long time, which may cause the current-voltage curve (IV curve) of this part of the transistor element to shift and cause horizontal lines Visual effect problems, severe cases may also cause damage to this part of the transistor element. Especially, after the reliability test of the in-cell touch display panel 900 is carried out, the visual effect of the horizontal stripes will be more serious, which will reduce the quality of image display.

Contents of the invention

In view of this, the present invention provides a touch display driver and a driving method for driving an in-cell touch display panel, which can be used within a certain time interval (for example, within a certain number of frame periods), when the screen display action interval At the end (because of the touch sensing action), the gate drive circuit in the touch display driver stops driving on a different gate drive line, that is, the gate drive line that the gate drive circuit stops driving does not Repeated (or not fixed), this can prevent the gate drive circuit from stopping driving on the fixed gate drive line for a long time, thereby avoiding the gate drive of the embedded touch display panel corresponding to the fixed gate drive line Transistor elements in the circuit are degraded by long-term high-voltage driving, and can reduce the impact of horizontal stripes on image display quality.

The touch display driver of the present invention includes a control circuit, a gate drive circuit and a touch detection circuit. The control circuit is used for dividing each of the plurality of frame periods into a plurality of image display action intervals and a plurality of touch sensing action intervals. Each screen display action interval and each touch sensing action interval are interleaved with each other, and each touch sensing action interval is behind each corresponding screen display action interval. The gate driving circuit is controlled by the control circuit, and is used for sequentially driving at least one of the plurality of gate driving lines of the in-cell touch display panel to perform picture display operation in each picture display operation interval. The touch detection circuit is controlled by the control circuit, and is used for controlling the voltage level of the gate driving line of the in-cell touch display panel and performing the touch sensing operation during these touch sensing operation intervals. The control circuit controls the gate drive circuit to drive different numbers of gate drive lines in the initial picture display action interval of each frame period, so that when the picture display action intervals of these picture frame periods end, the gate drive circuit Stop driving on a different gate drive line.

In an embodiment of the present invention, the above-mentioned control circuit controls the number of gate driving lines driven by the gate driving circuit in each picture display operation interval of each frame period, so that these When the screen display operation interval ends, the gate drive circuit stops driving on different gate drive lines.

In an embodiment of the present invention, the above-mentioned control circuit adjusts the time length of each touch sensing action interval of each frame period.

In an embodiment of the present invention, the above-mentioned control circuit dynamically adjusts the number of frame periods.

In an embodiment of the present invention, the number of the aforementioned frame periods is less than the number of the gate driving lines of the in-cell touch display panel.

The driving method of the present invention includes the following steps. Each of the plurality of frame periods is divided into a plurality of screen display action intervals and a plurality of touch sensing action intervals, each screen display action interval and each touch sensing action interval are interlaced with each other, and each touch sense The measurement action interval is after the corresponding display action interval on each screen. In each picture display action interval, at least one of the plurality of gate drive lines of the in-cell touch display panel is sequentially driven by the gate drive circuit to perform picture display actions, and in these touch sensing actions In the interval, the voltage level of these gate drive lines of the embedded touch display panel is controlled by the touch detection circuit and the touch sensing operation is performed. Different numbers of gate driving lines are driven in the picture display action interval, so that when the picture display action intervals of the frame periods end, the gate drive circuit stops driving on different gate drive lines.

Based on the above, in the touch display driver and driving method of the embedded touch display panel proposed by the embodiment of the present invention, within a certain time interval (for example, within a certain number of frame periods), when the screen display action interval At the end (because of the touch sensing action), the gate drive circuit in the touch display driver will stop driving on different gate drive lines, that is, the gate drive circuit will stop when the screen display action interval ends The gate drive lines driven are not fixed. In this way, the transistor element in the gate driving circuit corresponding to the fixed gate driving line can be prevented from deteriorating due to long-term high-voltage driving, and the influence of the visual effect of horizontal lines on the image display quality can be reduced.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a plurality of horizontal lines that appear when a general in-cell touch display panel displays images;

FIG. 2 is a schematic circuit block diagram of a touch display driver for driving an in-cell touch display panel according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the driving sequence of the touch display driver in FIG. 2 in consecutive M frame periods;

FIG. 4 is a schematic flowchart of steps of a driving method according to an embodiment of the present invention.

Explanation of reference signs:

100: touch display driver;

120: control circuit;

140: gate drive circuit;

160: touch detection circuit;

800, 900: Embedded touch display panel;

910: Horizontal line;

DP_A, DP_B, DP1_1, DP1_2, DP1_3, DP2_1, DP2_2, DP2_3, DPm_1, DPm_2, DPm_3: screen display action range;

FP1, FP2, ..., FPm, FPy: frame period;

G1～Gx, G(n-1), Gn, G(n+1), G(n+2), Gm, GI ₁ , GI ₂ , GI _m , G(I ₁ +1), G(I ₂ +1), G(I _m +1), G(I ₁ +K), G(I ₂ +K), G(I _m +K), G(I ₁ +K ₁ ), G(I ₂ + K ₂ ), G(I _m +K _m ): gate drive line;

R, G, B: sub-pixel unit;

S400, S410: steps;

TP_A, TP1_1, TP1_2, TP2_1, TP2_2, TPm_1, TPm_2: Touch sensing action range.

detailed description

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In addition, wherever possible, elements/members using the same reference numerals in the drawings and embodiments represent the same or similar parts.

Please refer to FIG. 2 and FIG. 3 together below. FIG. 2 is a schematic circuit block diagram of a touch display driver for driving an embedded touch display panel according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of the circuit of FIG. 2 Schematic diagram of the driving timing of the touch display driver in consecutive m frame periods, where the number m is an adjustable positive integer. The touch display driver 100 can be used to drive the in-cell touch display panel 800 . The in-cell touch display panel 800 has x gate driving lines G1 -Gx, wherein the number x can be any positive integer, and the number m is smaller than the number x. In fact, the number of gate driving lines of the in-cell touch display panel 800 can be determined according to actual application or design requirements.

The touch display driver 100 may include a control circuit 120 , a gate driving circuit 140 and a touch detection circuit 160 , but the invention is not limited thereto. The control circuit 120 can divide each frame period into a plurality of picture display action intervals and a plurality of touch sensing action intervals, wherein the number of picture display action intervals and the touch sensing action intervals in each frame period The number depends on the actual application or design requirements. However, for the convenience of description, it is assumed here that as shown in FIG. Touch sensing action interval TP1_2 and screen display action interval DP1_3; the control circuit 120 can divide the frame period FP2 into screen display action interval DP2_1, touch sensing action interval TP2_1, screen display action interval DP2_2, touch sensing The action interval TP2_2 and the screen display action interval DP2_3; the control circuit 120 can sequentially divide the frame period FPm into the screen display action interval DPm_1, the touch sensing action interval TPm_1, the screen display action interval DPm_2, and the touch sensing action interval TPm_2 and the frame display action interval DPm_3 , the rest of the frame periods can be deduced in the same way, but the present invention is not limited thereto.

The gate driving circuit 140 is controlled by the control circuit 120 . In the frame period FP1 shown in FIG. 3 , the gate driving circuit 140 can sequentially drive at least one gate driving line of the in-cell touch display panel 800 to perform a picture display operation in the picture display operation interval DP1_1. . Similarly, the gate driving circuit 140 can sequentially drive at least one gate driving line of the in-cell touch display panel 800 to perform a picture display operation in the picture display operation intervals DP1_2 and DP1_3 respectively. The operation of the gate driving circuit 140 in the frame display operation interval of the frame periods FP2-FPm can be deduced in the same way, so it is not repeated here.

The touch detection circuit 160 is controlled by the control circuit 120 . In the frame period FP1 shown in FIG. 3 , the touch detection circuit 160 can control the voltage levels of the gate driving lines G1˜Gx of the in-cell touch display panel 800 in the touch sensing action interval TP1_1 and Perform touch sensing actions. In the embodiment of the present invention, in the touch sensing operation interval TP1_1, the touch detection circuit 160 can control the gate driving lines G1-Gx to maintain a fixed voltage level, or can control the gate driving lines G1-Gx The voltage signal of Gx is synchronized with the touch driving signal of the common electrode of the in-cell touch display panel 800 to reduce the driving load during the touch sensing operation, but the invention is not limited thereto. Similarly, the touch detection circuit 160 can control the voltage levels of the gate driving lines G1 -Gx of the in-cell touch display panel 800 to perform a touch sensing operation in the touch sensing operation period TP1_2 . The operation of the gate driving circuit 140 in the touch sensing action interval during the frame periods FP2˜FPm can be deduced in the same way, so it is not repeated here.

In particular, in the consecutive m frame periods FP1 to FPm shown in FIG. 3 , the control circuit 120 can control the gate drive circuit 140 to drive different numbers of gates in the start-up image display operation interval of each frame period. pole drive line. For example, the control circuit 120 can control the gate drive circuit 140 to sequentially drive the I ₁ gate drive lines G1˜GI ₁ in the initial picture display action interval DP1_1 of the frame period FP1; the control circuit 120 can control the gate The driving circuit 140 sequentially drives the _I2 gate driving lines G1 _- GI2 in the initial picture display action interval DP2_1 of the frame period FP2; The start-up screen displays the operation interval DPm_1 to sequentially drive I _m gate driving lines G1-GI _m , wherein the numbers I ₁ , I ₂ , ..., _Im can be positive integers smaller than the number x, and the numbers I ₁ , I ₂ , . . . , _Im are different from each other and can be obtained randomly. In addition, the present invention does not limit the relationship between the quantities I ₁ , I ₂ , . . . , _Im . In this way, in the frame period FP1-FPm, when the initial screen display operation intervals DP1_1, DP2_1, . The circuit 140 will stop driving on different gate driving lines _{GI 1} , GI ₂ , . Stop driving on a fixed gate drive line, causing visual problems with horizontal lines.

In an embodiment of the present invention, in the m consecutive frame periods FP1-FPm shown in FIG. 3 , the control circuit 120 can control the gate drive circuit 140 to drive The same number of gate driving lines, but the present invention is not limited thereto. For example, the control circuit 120 can control the gate driving circuit 140 to sequentially drive the K gate driving lines G(I ₁ +1)˜G(I ₁ +K ); the control circuit 120 can control the gate driving circuit 140 to sequentially drive K gate driving lines G(I ₂ +1)˜G(I ₂ +K) in the remaining picture display action interval DP2_2 of the frame period FP2; By analogy, the control circuit 120 can control the gate driving circuit 140 to sequentially drive the K gate driving lines G(I _m +1) to G(I _m +K ), wherein the quantity K can be a positive integer smaller than the quantity x. In this way, in the m consecutive frame periods FP1˜FPm shown in FIG. 3 , when the screen display action intervals DP1_2, DP2_2, . . . , DPm_2 end, the touch sensing of the in-cell touch display panel 800 starts. During operation, the gate drive circuit 140 will stop driving on different gate drive lines G(I ₁ +K), G(I ₂ +K), ..., G(I _m +K), but the present invention does not Not limited to this.

In another embodiment of the present invention, during the m consecutive frame periods FP1-FPm shown in FIG. drive different numbers of gate drive lines. For example, the control circuit 120 can control the gate driving circuit 140 to sequentially drive K ₁ gate driving lines G(I ₁ +1)˜G(I ₁ + K ₁ ); the control circuit 120 can control the gate drive circuit 140 to sequentially drive K ₂ gate drive lines G(I ₂ +1)˜G(I ₂ + K ₂ ); and so on, the control circuit 120 can control the gate drive circuit 140 to sequentially drive the K _m gate drive lines G(I _m +1)～G in the remaining screen display action interval DPm_2 of the frame period FPm (I _m +K _m ), wherein the quantities K ₁ , K ₂ , ..., K _m can be positive integers smaller than the quantity x, and the quantities (I ₁ +K ₁ ), (I ₂ +K ₂ ), ... , (I _m +K _m ) are different from each other. In addition, the present invention does not limit the size relationship among the quantities (I ₁ +K ₁ ), (I ₂ +K ₂ ), . . . , (I _m +K _m ). In this way, in the m consecutive frame periods FP1˜FPm shown in FIG. 3 , when the screen display action intervals DP1_2, DP2_2, . . . , DPm_2 end, the touch sensing of the in-cell touch display panel 800 starts. When operating, the gate drive circuit 140 will stop driving on different gate drive lines G(I ₁ +K ₁ ), G(I ₂ +K ₂ ),...,G(I _m +K _m ), but The present invention is not limited thereto. In fact, as long as in the above-mentioned m consecutive frame periods FP1-FPm, when the screen display action intervals DP1_2, DP2_2, . Be the spirit of the present invention.

It can be seen from this that, in the consecutive m frame periods FP1-FPm shown in FIG. The number of driving lines is such that the gate driving circuit 140 will stop driving on different gate driving lines when each frame display operation interval of each frame period of m consecutive frame periods FP1-FPm ends. In this way, since the human eye has the effect of persistence of vision, the visual effect of horizontal lines can be greatly improved.

In an embodiment of the present invention, the control circuit 120 can adjust the time length of each touch sensing action interval in each frame period, so as to adjust the gate drive circuit corresponding to the stopped gate drive line. time for transistor elements to be degraded by high voltage. For example, as shown in FIG. 3 , the control circuit 120 can adjust the time length of the touch sensing action interval TP1_1 _of the frame period FP1 to adjust the transistor in the gate driving circuit 140 corresponding to the gate driving line GI1. Time for components to be degraded by high voltage. When the time length of the touch sensing action interval _{TP1_1} is shorter, the time for the transistor element in the gate driving circuit 140 corresponding to the gate driving line GI1 to be degraded by the high voltage is shorter, and vice versa. The remaining touch sensing action intervals TP1_2 , TP2_1 , TP2_2 , TPm_1 , TPm_2 can also be deduced in the same way.

In an embodiment of the present invention, the control circuit 120 can also dynamically adjust the value of the quantity m. When the value of the number m is larger, it means that within a longer time interval (that is, within more consecutive frame periods), the gate drive line stopped by the gate drive circuit 140 does not repeat, vice versa.

In an embodiment of the present invention, the control circuit 120 may be hardware, firmware, or software or machine executable program stored in a memory and loaded and executed by a microprocessor (micro processor) or a digital signal processor (DSP). code. If implemented by hardware, the control circuit 120 may be implemented by multiple circuit chips, or by a single integrated circuit chip, but the present invention is not limited thereto. The above-mentioned multiple circuit chips or a single integrated circuit chip can be realized by special function integrated circuit (ASIC) or programmable logic gate array (FPGA). The aforementioned memory may be, for example, a random access memory, a read-only memory, a flash memory, and the like. In addition, the implementation details of the gate driving circuit 140 and the touch detection circuit 160 are not the focus of the present invention to be improved, and are familiar to those skilled in the art, so details will not be repeated here.

FIG. 4 is a schematic flowchart of steps of a driving method according to an embodiment of the present invention. Please refer to FIGS. 2-4 at the same time. The driving method of this exemplary embodiment can be used to drive the in-cell touch display panel 800 shown in FIG. 2 . The driving method of this exemplary embodiment includes the following steps. First, in step S400, each of a plurality of frame periods (for example, m frame periods FP1 to FPm shown in FIG. 3 ) (for example, frame period FP1) is divided into a plurality of screen display action intervals ( Such as DP1_1, DP1_2, DP1_3, but not limited thereto) and a plurality of touch sensing motion zones (such as TP1_1, TP1_2, but not limited to this), wherein the screen display motion zones (such as DP1_1, DP1_2, DP1_3) and touch sense The detection action intervals (eg TP1_1 , TP1_2 ) are interlaced with each other, and the touch sensing action interval (eg TP1_1 ) is behind the corresponding screen display action interval (eg DP1_1 ).

Next, in step S410, in each screen display operation interval, at least one gate drive line of the in-cell touch display panel 800 is sequentially driven by the gate drive circuit 140 to perform a screen display operation; In a touch sensing operation interval, the touch detection circuit 160 controls the voltage levels of the gate driving lines G1 -Gx of the in-cell touch display panel 800 to perform a touch sensing operation. In particular, different numbers of gate driving lines can be driven by the gate driving circuit 140 in the start-up image display operation interval of each of the above-mentioned m frame periods FP1-FPm. For example, as mentioned above, the I ₁ gate driving lines G1˜GI ₁ can be sequentially driven by the gate driving circuit 140 in the initial picture display action interval DP1_1 of the frame period FP1; The circuit 140 sequentially drives ₁₂ gate drive lines G1 _- GI2 in the initial picture display action interval DP2_1 of the frame period FP2; In the screen display action interval DPm_1, I _m gate driving lines G1-GI _m are sequentially driven, wherein the numbers I ₁ , I ₂ , ..., I _m can be positive integers smaller than the number x, and the numbers I ₁ , I ₂ , . . . and I _m are different from each other and can be obtained in a random manner. In addition, the present invention does not limit the relationship between the quantities I ₁ , I ₂ , . . . , _Im . In this way, when the initial screen display operation intervals DP1_1, DP2_1, . _{GI 1} , GI ₂ , . , resulting in a horizontal line visual effect problem.

In addition, the details of the driving method of the embodiment of the present invention can be obtained from the description of the embodiment in FIG. 2 and FIG. 3 for sufficient teaching, suggestion and implementation description, so no more details are given here.

To sum up, in the touch display driver and driving method of the embedded touch display panel proposed by the embodiment of the present invention, it is possible to display the screen within a certain time interval (for example, within a certain number of frame periods). At the end of the action interval (because of the touch sensing action), the gate drive circuit in the touch display driver will stop driving on different gate drive lines, that is, the gate drive circuit stopped driving by the gate drive circuit The line is not fixed. In this way, the transistor element in the gate driving circuit corresponding to the fixed gate driving line can be prevented from deteriorating due to long-term high-voltage driving, and the influence of the visual effect of horizontal lines on the image display quality can be reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A touch display driver, characterized in that it is used to drive an embedded touch display panel, comprising: The control circuit is used to divide each of the plurality of frame periods into a plurality of screen display action intervals and a plurality of touch sensing action intervals, each of the screen display action intervals and each of the touch sensing actions The intervals are interlaced with each other, and each of the touch sensing action intervals is behind the corresponding respective screen display action intervals; The gate driving circuit is controlled by the control circuit, and is used to sequentially drive at least one of the plurality of gate driving lines of the embedded touch display panel in each of the picture display operation intervals. perform screen display actions; and The touch detection circuit is controlled by the control circuit, and is used to control the voltage levels of the plurality of gate drive lines of the in-cell touch display panel in the plurality of touch sensing action intervals. level and perform touch sensing action, Wherein, the control circuit controls the gate driving circuit to drive different numbers of the plurality of gate driving lines in the initial picture display action interval of each of the frame periods, so that the plurality of frame periods When the plurality of picture display operation intervals end, the gate driving circuit stops driving on the different plurality of gate driving lines. 2. The touch display driver according to claim 1, characterized in that: The control circuit controls the number of the plurality of gate driving lines driven by the gate driving circuit in each of the picture display operation intervals of each of the frame periods, so that the plurality of frame periods When the plurality of picture display operation intervals end, the gate driving circuit stops driving on the different plurality of gate driving lines. 3. The touch display driver according to claim 1, characterized in that: The control circuit adjusts the time length of each touch sensing action interval of each frame period. 4. The touch display driver according to claim 1, wherein the control circuit dynamically adjusts the number of the plurality of frame periods. 5. The touch display driver according to claim 4, wherein the number of the plurality of frame periods is less than that of the plurality of gate drive lines of the in-cell touch display panel quantity. 6. A method for driving an embedded touch display panel, comprising: Divide each of the plurality of frame periods into a plurality of screen display action intervals and a plurality of touch sensing action intervals, each of the screen display action intervals and each of the touch sensing action intervals are interleaved with each other, and Each of the touch sensing action intervals is after each of the corresponding screen display action intervals; and In each of the picture display operation intervals, at least one of the multiple gate drive lines of the in-cell touch display panel is sequentially driven by the gate drive circuit to perform picture display operations, and during the multiple In a touch sensing action interval, the touch detection circuit controls the voltage levels of the plurality of gate drive lines of the in-cell touch display panel to perform a touch sensing action, Wherein, the gate drive circuit drives different numbers of the multiple gate drive lines in the initial picture display action interval of each frame period, so that the multiple gate drive lines of the multiple frame periods When a frame display operation interval ends, the gate drive circuit stops driving on the different gate drive lines. 7. The driving method according to claim 6, further comprising: Adjusting the number of the plurality of gate driving lines driven by the gate driving circuit in each of the picture display operation intervals of each of the frame periods, so that all of the plurality of frame periods When the plurality of picture display operation intervals end, the gate driving circuit stops driving on the different plurality of gate driving lines. 8. The driving method according to claim 6, further comprising: Adjusting the time length of each touch sensing action interval of each frame period. 9. The driving method according to claim 6, further comprising: The number of the plurality of frame periods is dynamically adjusted. 10 . The driving method according to claim 9 , wherein the number of the plurality of frame periods is less than the number of the plurality of gate driving lines of the in-cell touch display panel. 11 .