Touch sampling control module and method and display touch device

Abstract

The invention discloses a touch sampling control module and method and a display touch device. The touch sampling control module comprises a touch sampling flag bit providing circuit (11) and a sampling time control circuit (12); the touch sampling flag bit providing circuit (11) is used for generating a touch sampling flag bit according to a fluctuation time point of a data voltage provided to the touch display panel; the sampling time control circuit (12) is used for controlling the touch sampling time according to the touch sampling flag bit, so that the touch sampling time is different from the fluctuation time point of the data voltage; and when the absolute value of the voltage value change value of the data voltage is greater than the voltage change value threshold value, the data voltage fluctuates. The touch sampling control module can enable the touch sampling time to be different from the fluctuation time point of the data voltage, so that the noise generated when the voltage fluctuation of the data voltage is coupled to the touch sensor is reduced.

Description

Touch sampling control module, method and display touch device Technical Field

[0001] The present disclosure relates to the field of touch technology, and in particular to a touch sampling control module, method, and display touch device. Background Art

[0002] Due to its flexibility, OLED (organic light-emitting diode) displays can be applied to foldable and curled forms. In order to achieve further lightweight and thinness, the touch layer can be directly made on TFE (encapsulation film) for touch display. However, in this way, the distance between the touch layer and the cathode of the OLED and the transistors included in the pixel circuit is reduced, resulting in excessive coupling capacitance between the cathode of the OLED and the touch layer. As a result, during touch detection, the display interferes with the touch seriously, and it is impossible to distinguish between touch signals and noise, resulting in the inability to draw lines normally.

[0003] Summary of the Invention

[0004] In one aspect, an embodiment of the present disclosure provides a touch sampling control module, which is applied to a display touch device, wherein the display touch device includes a touch display panel, and the touch sampling control module includes a touch sampling flag providing circuit and a sampling time control circuit; wherein,

[0005] The touch sampling flag providing circuit is used to generate a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel;

[0006] The sampling time control circuit is used to control the touch sampling time according to the touch sampling flag bit, so that the touch sampling time is different from the fluctuation time point of the data voltage;

[0007] When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

[0008] Optionally, the display touch control device further includes a display driver integrated circuit;

[0009] The touch sampling flag providing circuit is used to receive the data voltage fluctuation indication signal provided by the display driver integrated circuit, and set the data voltage fluctuation indication signal as the touch sampling flag;

[0010] The data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage.

[0011] Optionally, the display touch device further includes a touch integrated circuit;

[0012] The touch sampling flag providing circuit and the sampling time control circuit are integrated into the touch integrated circuit.

[0013] Optionally, the display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage;

[0014] The conversion sub-circuit is used to receive the data voltage fluctuation indication signal provided by the display driver integrated circuit, convert the data voltage fluctuation indication signal into a corresponding timing signal, and provide the timing signal to the clock storage; the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage;

[0015] The clock storage is used to store the timing signal;

[0016] The touch sampling flag is the timing signal.

[0017] Optionally, the display touch device further includes a touch integrated circuit;

[0018] The sampling time control circuit is integrated into the touch control integrated circuit.

[0019] Optionally, the data voltage fluctuation indication signal is a frame synchronization signal or a line synchronization signal.

[0020] Optionally, the touch sampling control module described in the embodiment of the present disclosure further includes a data voltage providing circuit;

[0021] The data voltage supply circuit is used to control the number of data voltage fluctuations to be less than a fluctuation number threshold within a display period.

[0022] In a second aspect, an embodiment of the present disclosure provides a touch sampling control method, which is applied to a display touch device, wherein the display touch device includes a touch display panel, and the display control device further includes a touch sampling control method including a touch sampling flag providing circuit and a sampling time control circuit; the touch sampling control method includes:

[0023] The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel;

[0024] The sampling time control circuit controls the touch sampling time according to the touch sampling flag bit, so that the touch sampling time is different from the fluctuation time point of the data voltage;

[0025] When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

[0026] Optionally, the sampling time control circuit controls the touch sampling time according to the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage, and the step includes:

[0027] The sampling time control circuit controls the touch sampling time to be set after the fluctuation time point of the data voltage according to the touch sampling flag, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

[0028] Optionally, the sampling time control circuit controls the touch sampling time according to the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage, and the step includes:

[0029] The sampling time control circuit controls the touch sampling time to be set before the fluctuation time point of the data voltage according to the touch sampling flag, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

[0030] Optionally, the time threshold is Tz / N;

[0031] Wherein, Tz is a frame time, and N is the total number of rows of pixel circuits included in the display touch device.

[0032] Optionally, the display touch control device further includes a display driver integrated circuit;

[0033] The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel, comprising:

[0034] The touch sampling flag providing circuit receives the data voltage fluctuation indication signal provided by the display driver integrated circuit, and sets the data voltage fluctuation indication signal as the touch sampling flag;

[0035] The data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage.

[0036] Optionally, the display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage;

[0037] The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel, comprising:

[0038] The conversion sub-circuit receives a data voltage fluctuation indication signal provided by the display driver integrated circuit, converts the data voltage fluctuation indication signal into a corresponding timing signal, and provides the timing signal to the clock storage; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage;

[0039] The clock storage stores the timing signal;

[0040] The touch sampling flag is the timing signal.

[0041] Optionally, the data voltage fluctuation indication signal is a frame synchronization signal or a line synchronization signal.

[0042] Optionally, the touch sampling control module further includes a data voltage providing circuit; and the touch sampling control method includes:

[0043] During a display period, the data voltage supply circuit controls the number of data voltage fluctuations to be less than a fluctuation number threshold.

[0044] In a third aspect, an embodiment of the present disclosure provides a display touch device, comprising the above-mentioned touch sampling control module.

[0045] Optionally, the display touch device according to at least one embodiment of the present disclosure further includes a touch display panel and a data voltage providing circuit; the data voltage providing circuit is used to provide a data voltage for a pixel circuit included in the touch display panel;

[0046] The touch sampling mark providing module is electrically connected to the data voltage providing circuit, and is used to generate a touch sampling mark according to a fluctuation time point of the data voltage.

[0047] Optionally, the display touch device includes a source driver, and the data voltage providing circuit is integrated into the source driver.

[0048] Optionally, the display touch control device further includes a display driver integrated circuit;

[0049] The display driver integrated circuit is electrically connected to the data voltage providing circuit, and is configured to obtain a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit, and provide the data voltage fluctuation indication signal to the touch sampling flag providing circuit; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage;

[0050] The touch sampling flag providing circuit is used to set the data voltage fluctuation indication signal as a touch sampling flag.

[0051] Optionally, the display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage;

[0052] The display driver integrated circuit is electrically connected to the data voltage providing circuit, and is used to obtain a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit, and provide the data voltage fluctuation indication signal to the conversion sub-circuit;

[0053] The conversion sub-circuit is used to convert the data voltage fluctuation indication signal into a corresponding timing signal, and provide the timing signal to the clock storage;

[0054] The clock storage is used to store the timing signal; the touch sampling flag is the timing signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a structural diagram of a touch sampling control module according to an embodiment of the present disclosure;

[0056] FIG2 is a structural diagram of a touch sampling control module according to at least one embodiment of the present disclosure;

[0057] FIG3 is a structural diagram of a touch sampling control module according to at least one embodiment of the present disclosure;

[0058] FIG4 is a structural diagram of a touch sampling control module according to at least one embodiment of the present disclosure;

[0059] FIG5 is a structural diagram of a touch sampling control module according to at least one embodiment of the present disclosure;

[0060] FIG6 is a timing diagram of the operation of the touch sampling control module according to at least one embodiment of the present disclosure;

[0061] FIG7 is a timing diagram of the operation of the touch sampling control module according to at least one embodiment of the present disclosure;

[0062] FIG8 is a timing diagram of the operation of the touch sampling control module according to at least one embodiment of the present disclosure;

[0063] 9 is a waveform diagram of a data voltage before and after improvement, and a noise signal before and after improvement;

[0064] FIG10 is a waveform diagram of a data voltage before and after improvement, and a noise signal before and after improvement;

[0065] FIG11 is a flow chart of a touch sampling control method according to an embodiment of the present disclosure;

[0066] FIG12 is a structural diagram of a display touch device according to at least one embodiment of the present disclosure;

[0067] FIG13 is a structural diagram of a display touch device according to at least one embodiment of the present disclosure;

[0068] FIG14 is a structural diagram of a display touch device according to at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0069] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0070] The transistors used in all embodiments of the present disclosure may be thin film transistors, field effect transistors, or other devices with the same characteristics. In the embodiments of the present disclosure, to distinguish the two electrodes of the transistor except the gate, one electrode is referred to as the first electrode and the other electrode is referred to as the second electrode.

[0071] In actual operation, when the transistor is a thin film transistor or a field effect transistor, the first electrode may be a drain electrode, and the second electrode may be a source electrode; or, the first electrode may be a source electrode, and the second electrode may be a drain electrode.

[0072] The touch sampling control module of the embodiment of the present disclosure is applied to a display touch device, wherein the display touch device includes a touch display panel. As shown in FIG1 , the touch sampling control module includes a touch sampling flag providing circuit 11 and a sampling time control circuit 12; wherein,

[0073] The touch sampling flag providing circuit 11 is used to generate a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel;

[0074] The sampling time control circuit 12 is electrically connected to the touch sampling flag providing circuit 11, and is configured to control the touch sampling time according to the touch sampling flag, so that the touch sampling time is different from the fluctuation time point of the data voltage;

[0075] When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

[0076] When the touch sampling control module described in the embodiment of the present disclosure is in operation, the touch sampling flag providing circuit 11 generates a touch sampling flag based on the fluctuation point of the data voltage provided to the touch display panel. The sampling time control circuit 12 controls the touch sampling time based on the touch sampling flag, so that the touch sampling time is different from the fluctuation time point of the data voltage. This reduces the noise coupled into the touch sensor by the voltage fluctuation of the data voltage, avoids the problem of being unable to distinguish between touch signals and display noise during touch driving, and thus prevents the occurrence of abnormal touch control. Touch sampling is performed while effectively avoiding large touch noise frequencies, thereby improving the touch signal-to-noise ratio (SNR) and meeting the requirements of active pen applications.

[0077] In at least one embodiment of the present disclosure, the time interval between the touch sampling time and the fluctuation time point of the data voltage may be greater than a line scanning time, so that the touch sampling time and the fluctuation time point of the data voltage do not overlap;

[0078] The scanning time for one row may be equal to Tz / N, where Tz is one frame time and N is the total number of rows of pixel circuits included in the display touch control device.

[0079] In at least one embodiment of the present disclosure, the display touch control device may further include a touch screen device; the touch screen device may be used to contact the touch screen included in the display touch control device, and the touch detection module included in the display touch control device may detect the position where the touch screen is contacted by the touch screen device; for example, the touch screen device may include an active pen, a reading pen, an electromagnetic pen, a passive pen, etc.; or, the touch screen device may also be a finger, but is not limited to this.

[0080] In a specific implementation, the display touch device may include a touch screen. In addition to being able to be operated by finger contact, the touch screen can also be operated by a touch pen, an electromagnetic pen, or a reading pen. The touch pen may include an active pen and a passive pen. The passive pen functions as a finger. When the passive pen contacts the touch screen, a small amount of current flows from the touch point to the passive pen, which is equivalent to a change in the electrode capacitance at the touch point. The active pen can emit a driving signal to change the electric field at the touch point, thereby changing the electrode capacitance at the touch point. The touch detection module included in the display touch device can determine the position of the touch point by detecting the change in electrode capacitance.

[0081] In at least one embodiment of the present disclosure, during the touch sampling time, a TIC (touch integrated circuit) samples electrical parameters of touch electrodes included in the touch display panel to obtain a position on the touch display panel where the touch screen device contacts.

[0082] In at least one embodiment of the present disclosure, the data voltage fluctuation refers to: the absolute value of the voltage change of the data voltage is greater than the voltage change value threshold; for example, the voltage change value threshold can be greater than or equal to 0.8V and less than or equal to 1.5V, but is not limited to this.

[0083] The touch sampling control module described in at least one embodiment of the present disclosure can avoid large touch noise without affecting the display effect. The touch sampling control module described in at least one embodiment of the present disclosure can be applied not only to display devices using on-cell touch technology (on-cell refers to a method of embedding the touch panel function between the color filter substrate and the polarizer), but also to display devices using in-cell touch technology (in-cell refers to a method of embedding the touch panel function into the liquid crystal pixels) and display devices using add-on touch technology (add-on refers to a method of adding a touch display to the display screen).

[0084] When the touch screen device is an active stylus, the touch sampling control module described in at least one embodiment of the present disclosure is not limited to active stylus protocols. At least one embodiment of the present disclosure can apply the MPP (Microsoft Pen Protocol), HPP (HPP), AES (AES), and USI (Universal Stylus Initiative) active stylus protocols. Furthermore, the touch sampling control module described in at least one embodiment of the present disclosure is not limited by screen refresh rate and can be applied to display devices with refresh rates of 60Hz, 90Hz, 120Hz, and 144Hz.

[0085] In at least one embodiment of the present disclosure, the display touch device further includes a display driver integrated circuit;

[0086] The display driver integrated circuit is used to provide a data voltage fluctuation indication signal to the touch sampling mark position providing circuit; the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage;

[0087] The touch sampling flag providing circuit is used to set the data voltage fluctuation indication signal as a touch sampling flag.

[0088] In a specific implementation, the display touch device may further include a display driver integrated circuit, which provides a data voltage fluctuation indication signal to the touch sampling mark position providing circuit, and the touch sampling mark position providing circuit sets the data voltage fluctuation indication signal as the touch sampling mark position.

[0089] For example, the data voltage fluctuation indication signal may include a frame synchronization signal Vsync or a horizontal synchronization signal Hsync, but is not limited thereto.

[0090] As shown in FIG2 , in at least one embodiment of the present disclosure, the display touch device further includes a display driver integrated circuit 41 ;

[0091] The display driver integrated circuit 41 is electrically connected to the touch sampling flag providing circuit 11 and is configured to provide a data voltage fluctuation indication signal to the touch sampling flag providing circuit 11; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage;

[0092] The touch sampling flag providing circuit 11 is used to set the data voltage fluctuation indication signal as a touch sampling flag;

[0093] The sampling time control circuit 12 is electrically connected to the touch sampling flag providing circuit 11, and is configured to control the touch sampling time according to the touch sampling flag, so that the touch sampling time is different from the fluctuation time point of the data voltage;

[0094] When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

[0095] In a specific implementation, the display driver integrated circuit 41 is electrically connected to the touch sampling flag providing circuit 11, and can directly synchronize the data voltage fluctuation indication signal to the touch sampling flag providing circuit 11. For example, the data voltage fluctuation indication signal can be a frame synchronization signal Vsync or a row synchronization signal Hsync, and the touch sampling flag providing circuit 11 can set the data voltage fluctuation indication signal as a touch sampling flag.

[0096] Optionally, the display touch device may further include a touch integrated circuit;

[0097] The touch sampling flag providing circuit and the sampling time control circuit are integrated into the touch integrated circuit.

[0098] In a specific implementation, the display touch control device may further include a touch control integrated circuit (TIC), and the touch sampling flag providing circuit and the sampling time control circuit may be integrated into the touch control integrated circuit.

[0099] As shown in FIG. 3 , reference numeral 20 indicates a touch integrated circuit, in which a touch sampling flag providing circuit 11 and a sampling time control circuit 12 are integrated.

[0100] Optionally, the display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage;

[0101] The display driver integrated circuit is used to provide a data voltage fluctuation indication signal to the conversion sub-circuit; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage;

[0102] The conversion sub-circuit is used to convert the data voltage fluctuation indication signal into a corresponding timing signal, and provide the timing signal to the clock storage;

[0103] The clock storage is used to store the timing signal;

[0104] The touch sampling flag is the timing signal.

[0105] In a specific implementation, the touch sampling mark providing circuit may include a conversion subcircuit and a clock storage. The conversion subcircuit converts the data voltage fluctuation indication signal into a timing signal. The clock storage stores the timing signal and uses the timing signal as the touch sampling mark.

[0106] At least one embodiment of the present disclosure can synchronize the data voltage fluctuation indication signal directly into the TIC as a trigger mark. For example, the frame synchronization signal Vsync or the line synchronization signal Hsync in the SDIC (display driver integrated circuit) can be synchronized into the TIC, and the frame synchronization signal Vsync or the line synchronization signal Hsync can be used as the touch sampling mark. Alternatively, at least one embodiment of the present disclosure can convert the data voltage fluctuation indication signal into a timing signal, store the timing signal in a clock storage, and synchronize the timing signal into the TIC as a trigger mark, so that the touch sampling frequency avoids the data voltage fluctuation frequency, thereby preventing the data voltage fluctuation from coupling to the touch sensor (the touch sensor can be included in the touch detection module) and interfering with the touch detection. As shown in FIG4 , based on the embodiment of the touch sampling control module shown in FIG1 , the display touch device also includes a display driver integrated circuit 41; the touch sampling mark providing circuit includes a conversion subcircuit 21 and a clock storage 22;

[0107] The display driver integrated circuit 41 is electrically connected to the conversion sub-circuit 21 and is used to provide a data voltage fluctuation indication signal to the conversion sub-circuit 21; the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage;

[0108] The conversion sub-circuit 21 is electrically connected to the clock storage 22 and is used to convert the data voltage fluctuation indication signal into a corresponding timing signal and provide the timing signal to the clock storage 22;

[0109] The clock storage 22 is used to store the timing signal; the touch sampling mark is the timing signal;

[0110] The sampling time control circuit 12 is electrically connected to the clock storage 22 and is used to obtain a timing signal from the clock storage 22 and control the touch sampling time according to the timing signal so that the touch sampling time is different from the fluctuation time point of the data voltage;

[0111] When the absolute value of the change in the data voltage value exceeds a voltage change value threshold, the data voltage fluctuates. In a specific implementation, the touch sampling flag providing circuit may include a conversion subcircuit and a clock storage. The conversion subcircuit converts the data voltage fluctuation indication signal into a timing signal; the clock storage stores the timing signal, which serves as the touch sampling flag.

[0112] In at least one embodiment of the present disclosure, the timing signal may be a clock signal. When each row of gate lines included in the display touch device is turned on and the corresponding row of pixel circuits begins to receive data voltages from the corresponding data lines, the timing signal has a rising edge or a falling edge.

[0113] When the data voltage fluctuation indication signal is a horizontal synchronization signal Hsync, the conversion sub-circuit may convert or shift the horizontal synchronization signal Hsync level to obtain the timing signal, so that the timing signal can indicate the time when each row of pixel circuits included in the display touch device starts to receive the data voltage provided by the corresponding data line; or,

[0114] When the data voltage fluctuation indication signal is a frame synchronization signal Vsync, the frame synchronization signal Vsync can indicate the start time of each frame, and since the time for scanning each row of pixel circuits included in the display touch device is fixed, the conversion sub-circuit can convert the timing signal according to the start time of each frame indicated by the frame synchronization signal Vsync, so that when each row of gate lines included in the display touch device is turned on and the corresponding row of pixel circuits starts to receive the data voltage from the corresponding data line, the timing signal has a rising edge or a falling edge.

[0115] In at least one embodiment of the present disclosure, the display touch device may further include a touch integrated circuit;

[0116] The sampling time control circuit is integrated into the touch control integrated circuit.

[0117] Optionally, the data voltage fluctuation indication signal is a frame synchronization signal or a line synchronization signal.

[0118] The touch sampling control module according to at least one embodiment of the present disclosure further includes a data voltage providing circuit;

[0119] The data voltage supply circuit is used to control the number of data voltage fluctuations to be less than a fluctuation number threshold within a display period.

[0120] At least one embodiment of the present disclosure can also reduce the noise caused by data voltage fluctuations coupled to the touch sensor by reducing the number of data voltage fluctuations.

[0121] As shown in FIG5 , based on the embodiment of the touch sampling control module shown in FIG1 , the touch sampling control module according to at least one embodiment of the present disclosure further includes a data voltage providing circuit 31 ;

[0122] The data voltage providing circuit 31 is electrically connected to the touch sampling mark providing circuit 11 and is used to control the number of data voltage fluctuations to be less than the fluctuation number threshold during the display period and provide the data voltage fluctuation time point to the touch sampling mark providing circuit 11.

[0123] When the touch screen device is an active pen, at least one embodiment of the present disclosure can use the data voltage fluctuation indication signal as a touch sampling mark bit, so that the TIC avoids the data voltage fluctuation frequency when sampling the touch situation of the active pen, thereby avoiding the influence of noise and solving the problem of active pen application. The reporting rate is different for different active pen protocols. For example, the reporting rate can be 240Hz, 360Hz or 266Hz. For different OLED (organic light emitting diode) display screens, the refresh rate is also different. Common refresh rates can be 60Hz, 90Hz, 120Hz, etc. The signal that can be associated with the data voltage fluctuation is synchronized to the TIC as the touch sampling mark bit of the TIC sampling. Sampling is performed after the voltage fluctuation of the data, which can effectively avoid the sampling of larger Touch noise frequency points, thereby improving the touch SNR and meeting the application requirements of the active pen.

[0124] Let's take an OLED display with a 60Hz refresh rate, an HPP active pen, and Vsync as the touch sampling marker as an example.

[0125] The refresh rate of the OLED display is 60Hz, so the screen is refreshed 60 times per second, the active pen reporting rate is 360Hz, and the TIC reports coordinates 360 times per second. The TIC extracts discrete signals from the continuous signals collected per second to sample the active pen touch information.

[0126] When the refresh rate of the OLED display is 60Hz and the active pen reporting rate is 360Hz, the OLED display refreshes one frame and the active pen reports six times. The time it takes for the OLED display to refresh one frame is 16.7ms. When it refreshes one frame and the active pen reports six times, the coding times are 2ms, 1.3ms, 1.2ms, 2ms, 1.3ms, and 1.2ms respectively. A sampling and reporting is performed during each coding time, and the sampling time is 0.4ms. Sampling needs to be performed within the coding time.

[0127] When an OLED display refreshes a frame, it scans U+M+V rows of pixel circuits (U, M, and V are all positive integers). The row scanning time, Ta, is 16.7 / (U+M+V). During this process, there are three data voltage fluctuations, as shown in Figure 6: the first data voltage fluctuation lasts for 2Ta, the second for (U+1)Ta, and the third for (U+M+1)Ta. Using Vsync as the touch sampling marker for TIC aligns the data voltage fluctuation time with the active pen touch sampling time, ensuring that the active pen touch sampling time and data voltage fluctuation time are kept within a certain range.

[0128] In FIG6 , Vdata is a data voltage.

[0129] In FIG6 , the first coding time period is labeled D1, the second coding time period is labeled D2, the third coding time period is labeled D3, the fourth coding time period is labeled D4, the fifth coding time period is labeled D5, and the sixth coding time period is labeled D6;

[0130] Each coding period should avoid three data voltage fluctuation periods;

[0131] The first sampling time period is S1, the second sampling time period is S2, the third sampling time period is S3, the fourth sampling time period is S4, the fifth sampling time period is S5, and the sixth sampling time period is S6.

[0132] Touch sampling may be performed in the first sampling period S1 , the second sampling period S2 , the third sampling period S3 , the fourth sampling period S4 , the fifth sampling period S5 , and the sixth sampling period S6 .

[0133] As shown in FIG7 , the touch sampling time can be set after the fluctuation time point of the data voltage;

[0134] In FIG7 , the time point labeled t0 is the fluctuation time point of the data voltage, and the first sampling period S1 , the second sampling period S2 , the third sampling period S3 , the fourth sampling period S4 , the fifth sampling period S5 and the sixth sampling period S6 are set after the fluctuation time point t0 of the data voltage;

[0135] Touch sampling is performed in the first sampling time period S1, the second sampling time period S2, the third sampling time period S3, the fourth sampling time period S4, the fifth sampling time period S5 and the sixth sampling time period S6, that is, the touch sampling time is included in each sampling time period;

[0136] The start time point of each sampling period and the fluctuation time point of the data voltage are greater than a line scan time, and the line scan time can be equal to Tz / N, where Tz is a frame time and N is the total number of pixel circuit rows included in the display touch device.

[0137] In Figure 7, the time period labeled D1 is the first coding time period, the time period labeled D2 is the second coding time period, the time period labeled D3 is the third coding time period, the time period labeled D4 is the fourth coding time period, the time period labeled D5 is the fifth coding time period, and the time period labeled D6 is the sixth coding time period.

[0138] As shown in FIG8 , the touch sampling time can be set before the fluctuation time point of the data voltage;

[0139] In FIG8 , the time point labeled t0 is the fluctuation time point of the data voltage, and the first sampling period S1, the second sampling period S2, the third sampling period S3, the fourth sampling period S4, the fifth sampling period S5 and the sixth sampling period S6 are set after the fluctuation time point t0 of the data voltage;

[0140] Touch sampling is performed in the first sampling time period S1, the second sampling time period S2, the third sampling time period S3, the fourth sampling time period S4, the fifth sampling time period S5 and the sixth sampling time period S6, that is, the touch sampling time is included in each sampling time period;

[0141] The end time point of each sampling period and the fluctuation time point of the data voltage are greater than a line scan time, and the line scan time can be equal to Tz / N, where Tz is a frame time and N is the total number of pixel circuits included in the display touch device.

[0142] In Figure 8, the time period labeled D1 is the first coding time period, the time period labeled D2 is the second coding time period, the time period labeled D3 is the third coding time period, the time period labeled D4 is the fourth coding time period, the time period labeled D5 is the fifth coding time period, and the time period labeled D6 is the sixth coding time period.

[0143] In at least one embodiment of the present disclosure, the interference of the display on the touch sampling can be reduced by reducing the number of data voltage fluctuations.

[0144] In FIG9 , Vdata-1 is the data voltage before improvement, Vdata-2 is the data voltage after improvement, F1 is the first frame time, and F2 is the second frame time; Tn1 is the noise signal before improvement, and Tn2 is the noise signal after improvement.

[0145] As shown in FIG9 , before the improvement, after the rising edge of the frame synchronization signal Vsync, the voltage value of the data voltage is the first voltage value Va (the data voltage is stored in the register). After scanning the second row of pixel circuits, the voltage value of the data voltage drops from the first voltage value to the second voltage value Vb. After scanning the U+1th row of pixel circuits, the voltage value of the data voltage is Vc. After scanning the U+M+1th row of pixel circuits, the voltage value of the data voltage rises to the first voltage value Va. That is, before the improvement, the voltage value of the data voltage fluctuates three times within one frame time. As can be seen from Tn1, before the improvement, there are three large noises within one frame time.

[0146] After the improvement, after the rising edge of the frame synchronization signal Vsync, the voltage value of the data voltage is the first voltage value Va. After scanning to the pixel circuit of the U+1th row, the voltage value of the data voltage is Vc. After scanning to the pixel circuit of the U+M+1th row, the voltage value of the data voltage rises to the first voltage value Va. That is, after the improvement, the voltage value of the data voltage fluctuates twice within one frame time. As can be seen from Tn1, before the improvement, there are two large noises within one frame time.

[0147] From the above comparison, it can be seen that by reducing the number of data voltage fluctuations within one frame time, touch noise can be reduced.

[0148] In FIG10 , Vdata-1 is the data voltage before improvement, Vdata-2 is the data voltage after improvement, F1 is the first frame time, and F2 is the second frame time; Tn1 is the noise signal before improvement, and Tn2 is the noise signal after improvement.

[0149] As shown in FIG10 , before the improvement, after the rising edge of the frame synchronization signal Vsync, the voltage value of the data voltage is the first voltage value Va (the data voltage is stored in the register). After scanning the second row of pixel circuits, the voltage value of the data voltage drops from the first voltage value to the second voltage value Vb. After scanning the U+1th row of pixel circuits, the voltage value of the data voltage is the third voltage value Vc. After scanning the U+M+1th row of pixel circuits, the voltage value of the data voltage rises to the first voltage value Va. That is, before the improvement, the voltage value of the data voltage fluctuates three times within one frame time. As can be seen from Tn1, before the improvement, there are three large noises within one frame time.

[0150] After the improvement, after the rising edge of the frame synchronization signal Vsync, the voltage value of the data voltage is the first voltage value Va. After scanning the second row of pixel circuits, the voltage value of the data voltage is Vc. After scanning the U+1th row of pixel circuits, the voltage value of the data voltage is Va. After the improvement, the voltage value of the data voltage fluctuates twice within one frame time. It can be seen from Tn2 that before the improvement, there were two large noises within one frame time.

[0151] From the above comparison, it can be seen that by reducing the number of data voltage fluctuations within one frame time, touch noise can be reduced.

[0152] The touch sampling control method according to an embodiment of the present disclosure is applied to a display touch control device, wherein the display touch control device includes a touch display panel, and the display control device also includes a touch sampling control method including a touch sampling flag providing circuit and a sampling time control circuit. As shown in FIG11 , the touch sampling control method includes:

[0153] S91: A touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel;

[0154] S92: The sampling time control circuit controls the touch sampling time according to the touch sampling flag, so that the touch sampling time is different from the fluctuation time point of the data voltage;

[0155] When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

[0156] In the touch sampling control method described in the embodiment of the present disclosure, a touch sampling flag providing circuit generates a touch sampling flag based on a fluctuation point of a data voltage provided to a touch display panel. The sampling time control circuit controls the touch sampling time based on the touch sampling flag, so that the touch sampling time is different from the fluctuation time point of the data voltage. This reduces the noise coupled into the touch sensor by the voltage fluctuation of the data voltage, avoids the problem of being unable to distinguish between touch signals and display noise during touch driving, and thus prevents the occurrence of abnormal touch control. Touch sampling is performed while effectively avoiding larger touch noise frequencies, thereby improving the touch signal-to-noise ratio (SNR) and meeting the requirements of touch applications.

[0157] Optionally, the sampling time control circuit controls the touch sampling time according to the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage, and the step includes:

[0158] The sampling time control circuit controls the touch sampling time to be set after the fluctuation time point of the data voltage according to the touch sampling flag, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

[0159] In at least one embodiment of the present disclosure, the touch sampling time may be set after the fluctuation time point of the data voltage, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

[0160] Optionally, the sampling time control circuit controls the touch sampling time according to the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage, and the step includes:

[0161] The sampling time control circuit controls the touch sampling time to be set before the fluctuation time point of the data voltage according to the touch sampling flag, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

[0162] In at least one embodiment of the present disclosure, the touch sampling time may be set before the fluctuation time point of the data voltage, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

[0163] Optionally, the time threshold may be Tz / N;

[0164] Wherein, Tz is a frame time, and N is the total number of rows of pixel circuits included in the display touch device, but is not limited thereto.

[0165] During specific implementation, the time threshold may also be greater than Tz / N.

[0166] Optionally, the display touch device further includes a display driver integrated circuit; and the step of the touch sampling flag providing circuit generating a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel includes:

[0167] The touch sampling flag providing circuit receives a data voltage fluctuation indication signal provided by the display driver integrated circuit, and sets the data voltage fluctuation indication signal as a touch sampling flag;

[0168] The data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage.

[0169] In at least one embodiment of the present disclosure, the display touch device further includes a display driver integrated circuit; the touch sampling flag providing circuit may include a conversion subcircuit and a clock storage;

[0170] The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel, comprising:

[0171] The conversion sub-circuit receives a data voltage fluctuation indication signal provided by the display driver integrated circuit, converts the data voltage fluctuation indication signal into a corresponding timing signal, and provides the timing signal to the clock storage; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage;

[0172] The clock storage stores the timing signal;

[0173] The touch sampling flag is the timing signal.

[0174] Optionally, the data voltage fluctuation indication signal is a frame synchronization signal or a line synchronization signal.

[0175] In at least one embodiment of the present disclosure, the touch sampling control module further includes a data voltage providing circuit; and the touch sampling control method includes:

[0176] During a display period, the data voltage supply circuit controls the number of data voltage fluctuations to be less than a fluctuation number threshold.

[0177] The display touch device described in the embodiment of the present disclosure includes the above-mentioned touch sampling control module.

[0178] The display touch device according to the embodiment of the present disclosure may further include a touch display panel and a data voltage providing circuit; the data voltage providing circuit is used to provide a data voltage to the pixel circuit included in the touch display panel;

[0179] The touch sampling mark providing module is electrically connected to the data voltage providing circuit, and is used to generate a touch sampling mark according to a fluctuation time point of the data voltage.

[0180] As shown in FIG12 , when the touch screen device is an active pen, the display touch device according to at least one embodiment of the present disclosure may further include an active pen 100 , a touch display panel P1 , and a data voltage providing circuit 101 ;

[0181] The data voltage providing circuit 101 is used to provide data voltage to the pixel circuit included in the touch display panel P1;

[0182] The touch sampling flag providing circuit 11 included in the touch sampling control module is electrically connected to the data voltage providing circuit 101 and is configured to generate a touch sampling flag according to a fluctuation time point of the data voltage;

[0183] The active pen 100 is used to contact the touch display surface of the touch display panel P1 .

[0184] In at least one embodiment of the present disclosure, the display touch device includes a source driver, and the data voltage providing circuit is integrated into the source driver.

[0185] In a specific implementation, the data voltage providing circuit may be integrated into a source driver.

[0186] As shown in FIG13 , based on at least one embodiment of the display touch control device shown in FIG12 , the display touch control device may include a source driver 110 ;

[0187] The data voltage providing circuit 101 may be integrated into the source driver 110 .

[0188] In at least one embodiment of the present disclosure, the display touch device further includes a touch integrated circuit;

[0189] The touch sampling flag providing circuit and the sampling time control circuit are integrated into the touch integrated circuit.

[0190] The display touch control device according to at least one embodiment of the present disclosure may further include a display driver integrated circuit;

[0191] The display driver integrated circuit is electrically connected to the data voltage providing circuit, and is configured to obtain a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit, and provide the data voltage fluctuation indication signal to the touch sampling flag providing circuit; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage;

[0192] The touch sampling flag providing circuit is used to set the data voltage fluctuation indication signal as a touch sampling flag.

[0193] In a specific implementation, the display touch device may further include a display driver integrated circuit, which obtains a data voltage fluctuation indication signal according to the data voltage, and the touch sampling flag providing circuit sets the data voltage fluctuation indication signal as the touch sampling flag.

[0194] As shown in FIG14 , based on at least one embodiment of the display touch device shown in FIG12 , the display touch device according to at least one embodiment of the present disclosure may further include a display driver integrated circuit 41 ;

[0195] The display driver integrated circuit 41 is electrically connected to the data voltage providing circuit 101 and the touch sampling flag providing circuit 11, respectively, for obtaining a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit 101, and providing the data voltage fluctuation indication signal to the touch sampling flag providing circuit 11;

[0196] The touch sampling flag providing circuit 11 is configured to set the data voltage fluctuation indication signal as a touch sampling flag.

[0197] In at least one embodiment of the present disclosure, the display touch device further includes a display driver integrated circuit; the touch sampling flag providing circuit includes a conversion subcircuit and a clock storage;

[0198] The display driver integrated circuit is electrically connected to the data voltage providing circuit, and is used to obtain a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit, and provide the data voltage fluctuation indication signal to the conversion sub-circuit;

[0199] The conversion sub-circuit is used to convert the data voltage fluctuation indication signal into a corresponding timing signal, and provide the timing signal to the clock storage;

[0200] The clock storage is used to store the timing signal; the touch sampling flag is the timing signal.

[0201] The display touch device provided in the embodiments of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or the like.

[0202] The above is a preferred embodiment of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present disclosure. These improvements and modifications should also be regarded as the scope of protection of the present disclosure.

Claims

1. A touch sampling control module, applied to a display touch device, wherein the display touch device includes a touch display panel, and the touch sampling control module includes a touch sampling flag providing circuit and a sampling time control circuit; wherein: The touch sampling flag providing circuit is used to generate a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel; The sampling time control circuit is used to control the touch sampling time according to the touch sampling flag bit, so that the touch sampling time is different from the fluctuation time point of the data voltage; When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

2. The touch sampling control module according to claim 1, wherein: The display touch control device further includes a display driver integrated circuit; The touch sampling flag providing circuit is used to receive the data voltage fluctuation indication signal provided by the display driver integrated circuit, and set the data voltage fluctuation indication signal as the touch sampling flag; The data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage.

3. The touch sampling control module according to claim 2, wherein: The display touch device further includes a touch integrated circuit; The touch sampling flag providing circuit and the sampling time control circuit are integrated into the touch integrated circuit.

4. The touch sampling control module according to claim 1, wherein: The display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage; The conversion sub-circuit is used to receive the data voltage fluctuation indication signal provided by the display driver integrated circuit, convert the data voltage fluctuation indication signal into a corresponding timing signal, and provide the timing signal to the clock storage; the data voltage fluctuation indication signal indicates the fluctuation time point of the data voltage; The clock storage is used to store the timing signal; The touch sampling flag is the timing signal.

5. The touch sampling control module according to claim 4, wherein: The display touch device further includes a touch integrated circuit; The sampling time control circuit is integrated into the touch control integrated circuit.

6. The touch sampling control module according to any one of claims 2 to 5, wherein: The data voltage fluctuation indication signal is a frame synchronization signal or a line synchronization signal.

7. The touch sampling control module according to any one of claims 1 to 5, wherein: Also included is a data voltage providing circuit; The data voltage supply circuit is used to control the number of data voltage fluctuations to be less than a fluctuation number threshold within a display period.

8. A touch sampling control method, applied to a display touch control device, the display touch control device comprising a touch display panel, the display control device further comprising a touch sampling control method comprising a touch sampling flag providing circuit and a sampling time control circuit; The touch sampling control method includes: The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel; The sampling time control circuit controls the touch sampling time according to the touch sampling flag bit, so that the touch sampling time is different from the fluctuation time point of the data voltage; When the absolute value of the voltage change value of the data voltage is greater than a voltage change value threshold, the data voltage fluctuates.

9. The touch sampling control method according to claim 8, wherein: The sampling time control circuit controls the touch sampling time according to the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage. The steps include: The sampling time control circuit controls the touch sampling time to be set after the fluctuation time point of the data voltage according to the touch sampling flag, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

10. The touch sampling control method according to claim 8, wherein: The sampling time control circuit controls the touch sampling time according to the touch sampling flag so that the touch sampling time is different from the fluctuation time point of the data voltage. The steps include: The sampling time control circuit controls the touch sampling time to be set before the fluctuation time point of the data voltage according to the touch sampling flag, and the time interval between the touch sampling time and the fluctuation time point of the data voltage is greater than a time threshold.

11. The touch sampling control method according to claim 9 or 10, wherein: The time threshold is Tz / N; Wherein, Tz is a frame time, and N is the total number of rows of pixel circuits included in the display touch device.

12. The touch sampling control method according to claim 8, wherein: The display touch control device further includes a display driver integrated circuit; The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel, comprising: The touch sampling flag providing circuit receives the data voltage fluctuation indication signal provided by the display driver integrated circuit, and sets the data voltage fluctuation indication signal as the touch sampling flag; The data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage.

13. The touch sampling control method according to claim 8, wherein: The display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage; The touch sampling flag providing circuit generates a touch sampling flag according to a fluctuation time point of a data voltage provided to the touch display panel, comprising: The conversion sub-circuit receives a data voltage fluctuation indication signal provided by the display driver integrated circuit, converts the data voltage fluctuation indication signal into a corresponding timing signal, and provides the timing signal to the clock storage; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage; The clock storage stores the timing signal; The touch sampling flag is the timing signal.

14. The touch sampling control method according to claim 12 or 13, wherein: The data voltage fluctuation indication signal is a frame synchronization signal or a line synchronization signal.

15. The touch sampling control method according to any one of claims 8 to 10, wherein: The touch sampling control module further includes a data voltage providing circuit; The touch sampling control method includes: During a display period, the data voltage supply circuit controls the number of data voltage fluctuations to be less than a fluctuation number threshold. 16 . A display touch device, comprising the touch sampling control module according to claim 1 .

17. The display touch device according to claim 16, wherein: It also includes a touch display panel and a data voltage supply circuit; the data voltage supply circuit is used to provide data voltage to the pixel circuit included in the touch display panel; The touch sampling mark providing module is electrically connected to the data voltage providing circuit, and is used to generate a touch sampling mark according to a fluctuation time point of the data voltage.

18. The display touch device according to claim 17, wherein: The display touch control device includes a source driver, and the data voltage providing circuit is integrated into the source driver.

19. The display touch device according to claim 17, wherein: The display touch control device further includes a display driver integrated circuit; The display driver integrated circuit is electrically connected to the data voltage providing circuit, and is configured to obtain a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit, and provide the data voltage fluctuation indication signal to the touch sampling flag providing circuit; the data voltage fluctuation indication signal indicates a fluctuation time point of the data voltage; The touch sampling flag providing circuit is used to set the data voltage fluctuation indication signal as a touch sampling flag.

20. The display touch device according to claim 17, wherein: The display touch device further includes a display driver integrated circuit; the touch sampling mark position providing circuit includes a conversion subcircuit and a clock storage; The display driver integrated circuit is electrically connected to the data voltage providing circuit, and is used to obtain a data voltage fluctuation indication signal according to the data voltage provided by the data voltage providing circuit, and provide the data voltage fluctuation indication signal to the conversion sub-circuit; The conversion sub-circuit is used to convert the data voltage fluctuation indication signal into a corresponding timing signal, and provide the timing signal to the clock storage; The clock storage is used to store the timing signal; the touch sampling flag is the timing signal.

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