TWI842447B - Timing control method and related timing control circuit - Google Patents

Abstract

A timing control method for a touch display device includes obtaining a horizontal synchronization signal, a vertical synchronization signal or a test enable signal of a touch display panel of the touch display device from a display driving circuit of the touch display device; determining a display configuration of the touch display panel according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal and a minimal system cycle of the touch display panel and a clock of the touch sensing circuit; and determining allocations of touch sensing signals of a touch sensing circuit of the touch display device, by a timing control circuit of the touch display device, according to the display configuration, wherein a time interval exists within the allocations of the touch signals of the touch sensing circuit.

Description

Timing control method and related timing control circuit

The present invention refers to a timing control method and a related timing control circuit, in particular, a timing control method and a related timing control circuit for controlling a touch sensing signal in timing to remove noise interference.

The touch panel and display driver chip of the existing touch display device operate at different timings. Therefore, the touch panel's touch sensing signal is not scanned at a fixed time in each frame of the display driver chip, resulting in the touch panel receiving data in the previous and next frames not having similar characteristics, which in turn affects the signal quality of the touch panel when performing coordinate calculations. However, even if the touch panel can obtain the reference signal of the display driver chip, it cannot effectively avoid the display period with noise. Every time the touch panel executes the touch sensing process, the touch sensing settings must be reconfigured through its firmware, and synchronous calculations cannot be processed.

Therefore, the existing technology needs to be improved.

In view of this, the present invention provides a timing control method and its related timing control circuit to adjust the touch sensing signal in timing to effectively avoid the display period with noise, thereby removing the noise of the display panel.

The present invention discloses a timing control method for a touch display device, comprising obtaining a horizontal synchronization signal, a vertical synchronization signal or a test enable signal of a touch display panel of the touch display device from a display drive circuit of the touch display device; determining a display configuration of the touch display panel according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal, a minimum system cycle of the touch display panel and a clock of the touch sensing circuit; and according to the display configuration, a timing control circuit of the touch display device determines the configuration of a touch sensing signal of a touch sensing circuit of the touch display device, and the configuration of the touch signal of the touch sensing circuit has a spacing in timing.

The present invention also discloses a timing control circuit for a touch display device, comprising a timing generator for generating a timing signal similar to a touch display panel of the touch display device; an input stage circuit coupled to a display driving circuit of the touch display device and the timing generator to output at least one of a horizontal synchronization signal, a vertical synchronization signal, and a test enable signal of the touch display panel and output a timing signal similar to the touch display panel; a pseudo vertical synchronization signal generator coupled to the input stage circuit to output a pseudo vertical synchronization signal; a synchronization mode configuration database for storing at least one touch configuration; a frame rate detector coupled to the input stage circuit, used to determine a current display configuration of the touch display panel according to at least one of the horizontal synchronization signal, the vertical synchronization signal, the test enable signal, a minimum system cycle of the touch display panel, and a clock of the touch sensing circuit; and a touch synchronization control circuit, used to determine the configuration of the touch sensing signal according to at least one of the horizontal synchronization signal, the vertical synchronization signal, the test enable signal, the pseudo vertical synchronization signal, and the synchronization mode configuration database, and the configuration of the touch signal of the touch synchronization control circuit has a spacing in timing.

10: Touch display device

102: Display driver circuit

104: Timing control circuit

106: Touch sensing circuit

104_TG: Timing Generator

104_IS: Input stage circuit

104_PVG: Pseudo vertical synchronization signal generator

104_CB: Synchronous mode configuration database

104_PC: Frame rate/cycle calculator

104_FRD: Frame Rate Detector

104_TC: Touch synchronous control circuit

30,60,80,100: Timing control method

302-312,602-608,802-808,1002-1008: Steps

Hsync: horizontal synchronization signal

TE: Test enable signal

P_Vsync: Pseudo vertical synchronization signal

P_Hsync: Pseudo horizontal synchronization signal

SG_0,SG_1,SG_2,SG_3: Touch sensing process

T0, T1, T2: time points

T_config: touch configuration

TF_0-TF_3: Touch sensing range

TH1, TH2: Threshold value

TP_0, TP_1: Touch processing flow

TP_clock: clock

Vsync: vertical synchronization signal

Figure 1 is a schematic diagram of a touch display device according to one embodiment of the present invention.

Figure 2 is a schematic diagram of a frame rate detector according to an embodiment of the present invention.

Figure 3 is a schematic diagram of a timing control method of one embodiment of the present invention.

Figure 4 is a timing diagram of a horizontal synchronization signal, a vertical synchronization signal, and a touch sensing process of a touch display panel in an embodiment of the present invention.

Figure 5 is a timing diagram of the horizontal synchronization signal, vertical synchronization signal and touch sensing process of the touch display panel of the embodiment of the present invention.

Figure 6 is a schematic diagram of the timing control method of an embodiment of the present invention.

Figure 7 is a timing diagram of the timing control method corresponding to Figure 6 of the embodiment of the present invention.

Figure 8 is a schematic diagram of the timing control method of an embodiment of the present invention.

Figure 9 is a timing diagram of the timing control method corresponding to Figure 8 in an embodiment of the present invention.

Figure 10 is a schematic diagram of the timing control method of an embodiment of the present invention.

Figure 11 is a timing diagram of the timing control method corresponding to Figure 10 in an embodiment of the present invention.

Please refer to FIG. 1, which is a schematic diagram of a touch display device according to an embodiment of the present invention. The touch display device 10 includes a display driver circuit 102, a touch display panel (not shown), a timing control circuit 104, and a touch sensing circuit 106. The display driver circuit 102 may be a driver chip of the touch display panel, and the timing control circuit 104 controls the configuration of the touch sensing signal of the touch sensing circuit 106 according to the timing signal of the touch display panel obtained from the display driver circuit 102. In one embodiment, the touch sensing signal may include a touch processing flow and a signal related to the touch sensing flow. In this way, the timing control circuit 104 of the embodiment of the present invention can reduce the interference of noise by synchronizing the touch sensing signal with the timing signal of the touch display panel.

In detail, the timing control circuit 104 includes a timing generator 104_TG, an input stage circuit 104_IS, a pseudo vertical synchronization signal generator 104_PVG, a synchronization mode configuration database 104_CB, a frame rate/cycle calculator 104_PC, a frame rate detector 104_FRD, and a touch synchronization control circuit 104_TC. The timing generator 104_TG is used to generate a timing signal similar to a touch display panel, such as a horizontal synchronization signal, a vertical synchronization signal, or a test enable signal of the touch display panel, wherein the timing signal generated by the timing generator 104_TG has the characteristics of a timing signal of a real touch display panel. The input stage circuit 104_IS is coupled to the display driver circuit 102 and the timing generator 104_TG, and outputs at least one of a horizontal synchronization signal Hsync, a vertical synchronization signal Vsync, and a test enable signal TE of the touch display panel, and outputs a timing signal similar to the touch display panel generated by the timing generator 104_TG.

The pseudo vertical synchronization signal generator 104_PVG is coupled to the input stage circuit 104_IS, and is used to output a pseudo vertical synchronization signal P_Vsync according to a timing signal similar to the touch display panel. The synchronization mode configuration database 104_CB is used to store at least one touch configuration T_config, such as self-capacitance, mutual capacitance, active touch pen and other touch configurations. The frame rate/cycle calculator 104_PC is used to detect the cycle information of each frame of the touch display panel. The frame rate detector 104_FRD is coupled to the input stage circuit 104_IS, and is used to determine a current display configuration of the touch display panel according to at least one of the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync, and the test enable signal TE of the touch display panel. The touch synchronization control circuit 104_TC is used to determine the configuration of the touch sensing signal according to the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync, at least one of the test enable signal TE, the pseudo vertical synchronization signal P_Vsync and the synchronization mode configuration database 104_CB, and the configuration of the touch sensing signal of the touch synchronization control circuit 104_TC has a spacing in timing.

Please refer to FIG. 2, which is a schematic diagram of the frame rate detector 104_FRD of the embodiment of the present invention. The frame rate detector 104_FRD determines the display configuration of the touch display panel according to the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync, the test enable signal TE, a threshold TH1, a threshold TH2 and a clock TP_clock of the touch sensing circuit 106 of the touch display panel.

In addition, the frame rate detector 104_FRD can confirm whether the pulse width of the horizontal synchronization signal Hsync and the leading and trailing edges (porch) of the vertical synchronization signal Vsync of the touch display panel change according to the above parameters, so as to determine whether the display configuration of the touch display panel changes. For example, when the pulse width of the horizontal synchronization signal Hsync or the leading and trailing edges (porch) of the vertical synchronization signal Vsync of the touch display panel changes, the frame rate detector 104_FRD can send a horizontal frame rate change interrupt signal or a vertical frame rate change interrupt signal; on the contrary, when the pulse width of the horizontal synchronization signal Hsync or the leading and trailing edges of the vertical synchronization signal Vsync of the touch display panel does not change, the frame rate detector 104_FRD determines that the display state of the touch display panel has not changed.

In one embodiment, the detection results of the frame rate detector 104_FRD and the frame rate/cycle calculator 104_PC can be used to record the brightness configuration of the current picture. If the detection results of the frame rate detector 104_FRD and the frame rate/cycle calculator 104_PC indicate that the picture has not changed, the display driver circuit 102 can directly maintain the current picture.

The threshold TH1 of the input parameter of the frame rate detector 104_FRD may be the number of pulses of the horizontal synchronization signal Hsync, and the threshold TH2 may be the system cycle time of the horizontal synchronization signal Hsync. The frame rate detector 104_FRD may determine the change of the vertical synchronization signal Vsync according to the change of the number of pulses of the horizontal synchronization signal Hsync of the threshold TH1. In addition, the frame rate detector 104_FRD may determine the change of the horizontal synchronization signal Hsync according to the change of the system cycle time of the horizontal synchronization signal Hsync of the threshold TH1 (i.e., the width of the pulse of the horizontal synchronization signal Hsync) and the clock TP_clock of the touch sensing circuit 106. In this way, the timing control circuit 104 of the touch display device 10 of the embodiment of the present invention can adjust the configuration of the touch sensing signal through a large delay (i.e., the number of pulses of the horizontal synchronization signal Hsync) and a small delay (i.e., the cycle time of the horizontal synchronization signal Hsync).

Please refer to FIG. 3 , the operation flow of the timing control circuit 104 of the touch display device 10 of the above embodiment of the present invention can be summarized as a timing control method 30. The timing control method 30 can be used for the timing control circuit 10, and includes the following steps: Step 302: Obtain the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync and/or the test enable signal TE of the touch display panel of the touch display device 10 from the display driver circuit 102; Step 304: Input the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync and/or the test enable signal TE to the input stage circuit 104_IS; Step 30 6: The frame rate detector 104_FRD determines the display configuration of the touch display panel according to the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync and/or the test enable signal TE; Step 308: The pseudo vertical synchronization signal generator 104_PVG generates a pseudo vertical synchronization signal P_Vsync; Step 310: Confirm the touch configuration according to the synchronization mode configuration database 104_CB; Step 312: The touch sensing circuit 106 executes the touch sensing procedure.

According to the timing control method 30, the timing control circuit 104 of the embodiment of the present invention can arbitrarily configure the touch process of the touch sensing circuit 106 to adjust the relative time and absolute time of each touch process.

Please refer to FIG. 4, which is a timing diagram of the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync and the touch sensing process of the touch display panel of the embodiment of the present invention. As shown in FIG. 4, by configuring the intervals between the touch sensing sections TF_0, TF_1, TF_2, and TF_3 of the touch sensing circuit 106 through the timing control circuit 104 of the embodiment of the present invention, the intervals of touch sensing can also be configured as required in the touch sensing process, and the intervals are based on the cycle of the horizontal synchronization signal Hsync, for example, the intervals between the touch sensing sections TF_0, TF_1, TF_2, and TF_3 are configured. _3 (i.e., the two pulses of the horizontal synchronization signal Hsync), the distance between the touch sensing sections TF_0, TF_1, TF_2, and TF_3 can be adjusted as needed, and the firmware of the touch display panel can simultaneously process the touch sensing frame of the previous frame, achieving a software and hardware multi-tasking working mode to effectively avoid the display period with noise, thereby removing the noise of the display panel.

Please refer to FIG. 5, which is a timing diagram of the horizontal synchronization signal Hsync, the vertical synchronization signal Vsync and the touch sensing process of the touch display panel of the embodiment of the present invention. In FIG. 5, the timing control circuit 104 of the embodiment of the present invention can configure the touch sensing circuit 106 in the touch sensing process to execute the touch sensing process SG_0, SG_1, SG_0, SG_1 in one frame, which is generally set to a fixed interval, but the distance between the touch sensing processes SG_0, SG_1 can be adjusted arbitrarily according to needs, and the firmware of the touch display panel can be used to process the touch processing processes TP_0, TP_1 in parallel. That is, after the touch sensing process SG_0 is completed, the firmware of the touch display panel and the timing control circuit 104 of the touch display device of the embodiment of the present invention continues to execute the touch processing process TP_0, and after the touch sensing process SG_1 is completed, the firmware of the touch display panel continues to execute the touch process TP_1.

In order to achieve synchronization at any resolution and refresh rate, in another embodiment, the timing control circuit 104 of the present invention only refers to the horizontal synchronization signal Hsync to dynamically generate the required vertical synchronization signal to evenly configure the touch sensing signal in each frame of the display screen.

Please refer to FIG. 6, which is a schematic diagram of a timing control method 60 of an embodiment of the present invention. The timing control method 60 can be used for a touch display device 10, and includes the following steps: Step 602: Obtain the horizontal synchronization signal Hsync of the touch display panel of the touch display device 10 from the display driver circuit 102; Step 604: Determine the pseudo vertical synchronization signal P_Vsync according to the horizontal synchronization signal Hsync of the touch display panel; Step 606: The touch synchronization control circuit 104_TC confirms the touch configuration according to the horizontal synchronization signal Hsync, the pseudo vertical synchronization signal P_Vsync and the synchronization mode configuration database 104_CB; Step 608: Synchronize the touch sensing signal with the timing signal of the touch display panel.

According to the timing control method 60, the timing control circuit 104 of the embodiment of the present invention can arbitrarily configure the touch process of the touch sensing circuit 106 to adjust the relative time and absolute time of each touch process.

Please refer to FIG. 7, which is a timing diagram corresponding to the timing control method 60 of the embodiment of the present invention. As can be seen from FIG. 7, between time point T0 and time point T1, the timing control circuit 104 can only receive the horizontal synchronization signal Hsync of the touch display panel, so the timing control circuit 104 can determine the period of the horizontal synchronization signal Hsync, the frame rate, and the number of pulses of the horizontal synchronization signal Hsync per frame according to the frame rate/cycle calculator 104_PC to determine the corresponding pseudo vertical synchronization signal P_Vsync. In one embodiment, the frame rate/cycle calculator 104_PC can determine the cycle of the horizontal synchronization signal Hsync by the number of pulses of the horizontal synchronization signal Hsync per frame. Therefore, the required pseudo vertical synchronization signal P_Vsync can be dynamically generated by referring to the horizontal synchronization signal Hsync. The start time of the touch sensing process is configured according to the requirements in the cycle of the horizontal synchronization signal Hsync of the touch display panel, so as to achieve the function of synchronization at any resolution and refresh rate.

In this way, the timing control circuit 104 can start configuring the touch sensing process SG_0-SG_3 at time point T1, and continue configuring the touch sensing process SG_0-SG_3 at time point T2. Configuring the start time of the touch sensing process can increase the anti-interference ability of the touch sensing against the noise from the display driver.

In another embodiment, the timing control circuit 104 of the embodiment of the present invention only refers to the vertical synchronization signal Vsync to dynamically generate the required horizontal synchronization signal to evenly configure the touch sensing signal in each frame of the display screen.

Please refer to FIG. 8, which is a schematic diagram of a timing control method 80 of an embodiment of the present invention. The timing control method 80 can be used for a touch display device 10, and includes the following steps: Step 802: Obtain the vertical synchronization signal Vsync of the touch display panel of the touch display device 10 from the display driver circuit 102; Step 804: Determine the pseudo horizontal synchronization signal P_Hsync according to the vertical synchronization signal Vsync of the touch display panel; Step 806: The touch synchronization control circuit 104_TC confirms the touch configuration according to the vertical synchronization signal Vsync, the pseudo horizontal synchronization signal P_Hsync and the synchronization mode configuration database 104_CB; Step 808: Synchronize the touch sensing signal with the timing signal of the touch display panel.

According to the timing control method 80, the timing control circuit 104 of the embodiment of the present invention can arbitrarily configure the touch process of the touch sensing circuit 106 to adjust the relative time and absolute time of each touch process.

Please refer to FIG. 9, which is a timing diagram corresponding to the timing control method 80 of the embodiment of the present invention. As can be seen from FIG. 9, between the time point T0 and the time point T1, the timing control circuit 104 can only receive the vertical synchronization signal Vsync of the touch display panel. Therefore, the timing control circuit 104 can determine the period of the vertical synchronization signal Vsync according to the frame rate/period calculator 104_PC to determine the corresponding pseudo horizontal synchronization signal P_Hsync. In this way, the timing control circuit 104 can start configuring the touch sensing process SG_0-SG_3 at time point T1, and continue configuring the touch sensing process SG_0-SG_3 at time point T2. Therefore, it only needs to refer to the vertical synchronization signal Vsync to dynamically generate the required pseudo horizontal synchronization signal P_Hsync, and configure the start time of the touch sensing process in the cycle of the vertical synchronization signal Vsync of the touch display panel as required, so as to achieve the function of synchronization at any resolution and refresh rate.

In another embodiment, the timing control circuit 104 of the embodiment of the present invention only refers to the test enable signal TE to dynamically generate the required horizontal synchronization signal to evenly configure the touch sensing signal in each frame of the display screen.

Please refer to FIG. 10 , which is a schematic diagram of a timing control method 100 according to an embodiment of the present invention. The timing control method 100 can be used for a touch display device 10, and includes the following steps: Step 1002: Obtaining a test enable signal TE of a touch display panel of the touch display device 10 from the display driver circuit 102; Step 1004: Determining a pseudo horizontal synchronization signal P_Hsync according to the test enable signal TE of the touch display panel; Step 1006: The touch synchronization control circuit 104_TC confirms the touch configuration according to the test enable signal TE, the pseudo horizontal synchronization signal P_Hsync and the synchronization mode configuration database 104_CB; Step 1008: Synchronizing the touch sensing signal with the timing signal of the touch display panel.

According to the timing control method 100, the timing control circuit 104 of the embodiment of the present invention can arbitrarily configure the touch process of the touch sensing circuit 106 to adjust the relative time and absolute time of each touch process.

Please refer to FIG. 11, which is a timing diagram corresponding to the timing control method 100 of the embodiment of the present invention. As can be seen from FIG. 11, between time point T0 and time point T1, the timing control circuit 104 can only receive the test enable signal TE related to the touch display panel, so the timing control circuit 104 can determine the period of the test enable signal TE according to the frame rate/period calculator 104_PC to determine the corresponding pseudo horizontal synchronization signal P_Hsync. In this way, the timing control circuit 104 can start configuring the touch sensing process SG_0-SG_3 at time point T1, and continue configuring the touch sensing process SG_0-SG_3 at time point T2. Therefore, only the test enable signal TE is needed to dynamically generate the required pseudo horizontal synchronization signal P_Hsync, and the start time of the touch sensing process is configured according to the requirements in the cycle of the test enable signal TE of the touch display panel, so as to achieve the function of synchronization at any resolution and refresh rate.

In summary, the timing control circuit of the embodiment of the present invention can accurately control the touch sensing time through the configuration of the current touch display driver circuit and the display configuration of the current touch display driver circuit, and the operation of the pre-configured touch sensing circuit, thereby avoiding a time range with large noise. In addition, the timing control circuit of the embodiment of the present invention can also effectively allocate the usage rate and access bandwidth of the memory. The above is only a preferred embodiment of the present invention, and all equal changes and modifications made according to the scope of the patent application of the present invention should be covered by the scope of the present invention.

30: Timing control method

302-312: Steps

Claims (18)

A timing control method for a touch display device comprises: obtaining a horizontal synchronization signal, a vertical synchronization signal or a test enable signal of a touch display panel of the touch display device from a display driving circuit of the touch display device; determining a timing control method for a touch display device according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal, a minimum system cycle of the touch display panel and a clock of a touch sensing circuit; A display configuration of the touch display panel; and according to the display configuration, a timing control circuit of the touch display device determines the configuration of a touch sensing signal of a touch sensing circuit of the touch display device, and the configuration of the touch signal of the touch sensing circuit has a spacing in timing; wherein the spacing of the configuration of the touch sensing signal of the touch sensing circuit in timing is related to the number of pulses of the horizontal synchronization signal. The timing control method as described in claim 1, wherein when the vertical synchronization signal is a pseudo vertical synchronization signal determined according to the horizontal synchronization signal, the timing control circuit determines the touch sensing signal configured for the touch sensing circuit according to the pseudo vertical synchronization signal and the horizontal synchronization signal; the pseudo vertical synchronization signal is determined according to a cycle of the horizontal synchronization signal and the number of pulses of the horizontal synchronization signal in the cycle and a frame rate of the touch display panel. The timing control method as described in claim 1, wherein when the horizontal synchronization signal is a pseudo horizontal synchronization signal determined according to the vertical synchronization signal, the timing control circuit determines the touch sensing signal configured for the touch sensing circuit according to the pseudo horizontal synchronization signal and the vertical synchronization signal; the pseudo horizontal synchronization signal is determined according to a cycle of the vertical synchronization signal. The timing control method as described in claim 1, wherein when the horizontal synchronization signal is a pseudo horizontal synchronization signal determined according to the test enable signal, the timing control circuit determines the touch sensing signal configured for the touch sensing circuit according to the pseudo horizontal synchronization signal and the test enable signal; the pseudo horizontal synchronization signal is determined according to a cycle of the test enable signal. The timing control method as described in claim 1 further comprises: determining a false vertical synchronization signal according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal; and transmitting the false vertical synchronization signal to the touch sensing circuit; determining the configuration of the touch sensing signal of the touch sensing circuit according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal and a synchronization mode configuration database. As described in claim 1, the timing control method, wherein a firmware of the touch display device and the touch sensing circuit operate in a parallel operation mode, and the firmware of the touch display device and the timing control circuit respectively execute a touch sensing process and a touch process in an alternating manner. The timing control method as described in claim 1, wherein the timing control circuit of the touch display device determines the configuration of the touch sensing signal of the touch sensing circuit of the touch display device within a cycle of the vertical synchronization signal. The timing control method as described in claim 1, wherein the spacing can be adjusted according to the number of pulses of the horizontal synchronization signal and a cycle time of the horizontal synchronization signal. The timing control method as described in claim 1, wherein the spacing of the touch sensing signals configured by the timing control circuit may be different. A timing control circuit for a touch display device comprises: a timing generator for generating a timing signal similar to a touch display panel of the touch display device; an input stage circuit coupled to a display driving circuit of the touch display device and the timing generator to output at least one of a horizontal synchronization signal, a vertical synchronization signal, and a test enable signal of the touch display panel and output a timing signal similar to the touch display panel; a pseudo vertical synchronization signal generator coupled to the input stage circuit for outputting a pseudo vertical synchronization signal; a synchronization mode configuration database for storing at least one touch configuration; a frame rate detector coupled to the input stage circuit for detecting a touch configuration according to the touch configuration; The horizontal synchronization signal, the vertical synchronization signal, the test enable signal, a minimum system cycle of the touch display panel, and at least one of a clock of a touch sensing circuit determine a current display configuration of the touch display panel; and a touch synchronization control circuit is used to determine the configuration of the touch sensing signal according to the horizontal synchronization signal, the vertical synchronization signal, at least one of the test enable signal, the pseudo vertical synchronization signal, and the synchronization mode configuration database, and the configuration of the touch signal of the touch synchronization control circuit has an interval in timing; wherein the interval of the configuration of the touch signal of the touch sensing circuit in timing is related to the number of pulses of the horizontal synchronization signal. A timing control circuit as described in claim 10, wherein when the vertical synchronization signal is a pseudo vertical synchronization signal determined according to the horizontal synchronization signal, the touch synchronization control circuit determines the touch sensing signal configured for the touch synchronization control circuit according to the pseudo vertical synchronization signal and the horizontal synchronization signal; the pseudo vertical synchronization signal is determined according to a cycle of the horizontal synchronization signal and the number of pulses of the horizontal synchronization signal within the cycle and a frame rate of the touch display panel. A timing control circuit as described in claim 10, wherein when the horizontal synchronization signal is a pseudo horizontal synchronization signal determined according to the vertical synchronization signal, the touch synchronization control circuit determines the touch sensing signal configured for the touch synchronization control circuit according to the pseudo horizontal synchronization signal and the vertical synchronization signal; the pseudo horizontal synchronization signal is determined according to a cycle of the vertical synchronization signal. The timing control circuit as described in claim 10, wherein when the horizontal synchronization signal is a pseudo horizontal synchronization signal determined according to the test enable signal, the touch synchronization control circuit determines the touch sensing signal configured for the touch synchronization control circuit according to the pseudo horizontal synchronization signal and the test enable signal; the pseudo horizontal synchronization signal is determined according to a cycle of the test enable signal. A timing control circuit as described in claim 10, wherein the timing generator determines the pseudo vertical synchronization signal and transmits it to the touch sensing circuit according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal, and determines the configuration of the touch sensing signal of the touch sensing circuit according to the horizontal synchronization signal, the vertical synchronization signal or the test enable signal and a synchronization mode configuration database. The timing control circuit as described in claim 10, wherein a firmware of the touch display device and the touch sensing circuit operate in a parallel operation mode, and the firmware of the touch display device and the timing control circuit respectively execute a touch sensing process and a touch process in an alternating manner. The timing control circuit as described in claim 10, wherein the timing control circuit of the touch display device determines the configuration of the touch sensing signal of the touch sensing circuit of the touch display device within a cycle of the vertical synchronization signal. A timing control circuit as described in claim 10, wherein the spacing can be adjusted according to the number of pulses of the horizontal synchronization signal and a cycle time of the horizontal synchronization signal. A timing control circuit as described in claim 10, wherein the spacing of the touch sensing signals configured in the timing control circuit may be different.

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