A touch device, a touch method, a display module and an electronic device

Abstract

The application relates to a touch device, a touch method, a display module and an electronic device, and relates to the technical field of data processing. The touch device is used for coupling with a touch display screen, and the touch display screen comprises a touch electrode array. The touch electrode array comprises a first transmission (TX) electrode. The touch display screen is used for displaying a plurality of image frames. The touch device is used for: during a display period of a first group of image frames in the plurality of image frames, transmitting a first touch signal to the first TX electrode; and during a display period of a second group of image frames in the plurality of image frames, transmitting a touch signal having a phase offset from the first touch signal to the first TX electrode. The display periods of the first group of image frames and the second group of image frames are adjacent. In this way, water ripples in a display picture of the touch display screen can be alleviated.

Description

Technical Field

[0001] This application relates to the field of data processing technology, and in particular to a touch device, touch method, display module and electronic device. Background Technology

[0002] Typically, a touch display consists of a touch layer and a display layer. In some scenarios, the touch layer can be located above the display layer. The touch layer includes a touch electrode array, while the display layer includes display circuitry. Users can touch the screen displayed on the touch display. The charge on the touch electrode array changes due to the user's touch, allowing the device containing the touch display to determine the location of the touch and process it accordingly.

[0003] As touch displays become increasingly thinner, while providing a better user experience, they also present greater challenges to touch technology. The reduced distance between the touch electrode array and the display circuit cathode increases the coupling capacitance between them, causing water ripples on the display screen and negatively impacting the user experience. Summary of the Invention

[0004] This application provides a touch device, touch method, display module, and electronic device, which solves the problem of water ripples on the display screen in the prior art.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a touch device is provided for coupling with a touch display screen, the touch display screen including a touch electrode array. The touch electrode array includes a first transmit (TX) electrode. The touch display screen is used to display a plurality of image frames. The touch device is used to: send a first touch signal to the first TX electrode during a display period of a first group of image frames of the plurality of image frames; and send a touch signal having a phase offset from the first touch signal to the first TX electrode during a display period of a second group of image frames of the plurality of image frames; wherein the display periods of the first group of image frames and the second group of image frames are adjacent.

[0007] In the above technical solution, the persistence of vision in the human eye can last for a period of time (e.g., 0.1–0.4 seconds). Since the display periods of the first and second set of image frames are adjacent, the human eye can retain the image of the first set of image frames even when viewing the second set. Because all (or part) of the lines of the water ripple effect caused by the touch signal, which has a phase offset from the first touch signal, have opposite brightness to all (or part) of the lines of the water ripple effect caused by the first touch signal, the water ripple effect is completely (or partially) canceled out. This reduces the water ripple effect on the displayed image and improves the user experience.

[0008] In one possible implementation of the first aspect, the touch signal having a phase offset from the first touch signal is a signal with the opposite phase to the first touch signal. In the above possible implementation, the touch signal corresponding to the first set of image frames has the opposite phase to the touch signal corresponding to the second set of image frames, that is, all the signals of the two touch signals are opposite, which can minimize the water ripple effect of the first set of image frames and the second set of image frames.

[0009] In one possible implementation of the first aspect, both the first group of image frames and the second group of image frames include M image frames, where M is an integer greater than or equal to 1. In the above possible implementation, since the persistence of vision in the human eye can last for a period of time (e.g., 0.1–0.4 seconds), and the display period of a single image frame is usually much shorter than this period, several image frames can be used as the first group of image frames. Typically, the display period of the first group of image frames is shorter than this period. The fewer the number of image frames in the first group (i.e., M), the shorter the display period of the first group of image frames, and the better the effect of water ripple reduction.

[0010] In one possible implementation of the first aspect, the touch device includes a signal output terminal, a first switch, a second switch, and a phase shifting device. The phase shifting device is used to change the phase of the signal. The signal output terminal and the input terminal of the phase shifting device are both coupled to the first terminal of the first switch. The signal output terminal of the phase shifting device is coupled to the first terminal of the second switch. The second terminal of the first switch is used to output a first touch signal. The second terminal of the second switch is used to output a touch signal with a phase shift relative to the first touch signal. In the above possible implementation, adding the first switch, the second switch, and the phase shifting device can achieve the transmission of a touch signal with a phase shift, resulting in a simple hardware structure and low circuit cost.

[0011] In one possible implementation of the first aspect, the phase shifting device is an inverter or a phase shifter. Among the above possible implementations, inverters or phase shifters are low in cost and have simple circuit structures.

[0012] In one possible implementation of the first aspect, the touch device is further configured to: send a second touch signal to the first TX electrode during the display period of a third group of image frames among the plurality of image frames; and send a touch signal with a phase offset from the second touch signal to the first TX electrode during the display period of a fourth group of image frames among the plurality of image frames. The display times of the third group of image frames and the fourth group of image frames are adjacent. In the above possible implementations, in addition to the first and second group of image frames, the persistence of vision effect can also be utilized in other adjacent groups of image frames (such as the third and fourth image frames) to reduce the visibility of water ripples to the human eye and improve the user experience.

[0013] In one possible implementation of the first aspect, the display periods of the second group of image frames and the third group of image frames are adjacent. In the above possible implementation, four consecutive groups of image frames, from the first group to the fourth group, can reduce water ripples, thereby improving the user's continuous viewing experience.

[0014] In one possible implementation of the first aspect, the touch electrode array further includes a second TX electrode. Specifically, the touch device is used to: send a first touch signal to the first TX electrode and a third touch signal to the second TX electrode during the display period of the first set of image frames; and during the display period of the second set of image frames, send a touch signal with a phase offset from the first touch signal to the first TX electrode and a touch signal with a phase offset from the third touch signal to the second TX electrode. In the above possible implementations, in addition to the first TX electrode, the persistence of vision effect can also be used to reduce the visibility of water ripples to the human eye and improve the user experience for other TX electrodes (such as the second TX electrode).

[0015] In one possible implementation of the first aspect, the third touch signal has a different frequency or phase than the first touch signal. In the above possible implementations, since the third touch signal has a different frequency than the first touch signal, the first TX electrode and the second TX electrode can be distinguished by frequency division multiplexing. Since the third touch signal has a different phase than the first touch signal, the first TX electrode and the second TX electrode can be distinguished by code division multiplexing.

[0016] In one possible implementation of the first aspect, the frame rate of the multiple image frames is greater than or equal to 10 Hz. In the above possible implementations, the higher the frame rate of the multiple image frames, for example, greater than or equal to 10 Hz, the shorter the display period of the first group of image frames, and the better the effect of water ripple reduction.

[0017] Secondly, a touch control device is provided for controlling a touch electrode array. The touch control device includes a signal output terminal, a first switch, a second switch, and a phase shifting device. The phase shifting device is used to change the phase of a signal. The signal output terminal and the input terminal of the phase shifting device are both coupled to a first terminal of the first switch. The signal output terminal of the phase shifting device is coupled to a first terminal of the second switch. The second terminals of both the first and second switches are used for coupling with the touch electrode array.

[0018] In one possible implementation of the second aspect, the phase shifting device is an inverter or a phase shifter.

[0019] Thirdly, a touch method is provided, which is applied to a touch electrode array of a touch display screen. The touch electrode array includes a first transmitting TX electrode. The touch display screen is used to display multiple image frames. The touch method includes: during the display period of a first group of image frames of the multiple image frames, transmitting a first touch signal to the first TX electrode; and during the display period of a second group of image frames of the multiple image frames, transmitting a touch signal having a phase offset from the first touch signal to the first TX electrode. The display periods of the first group of image frames and the second group of image frames are adjacent.

[0020] In one possible implementation of the third aspect, the touch signal having a phase offset from the first touch signal is a signal with a phase opposite to the first touch signal.

[0021] In one possible implementation of the third aspect, both the first group of image frames and the second group of image frames include M image frames, where M is an integer greater than or equal to 1.

[0022] In one possible implementation of the third aspect, the touch method further includes: sending a second touch signal to a first TX electrode during the display period of a third group of image frames among the plurality of image frames; and sending a touch signal with a phase offset from the second touch signal to the first TX electrode during the display period of a fourth group of image frames among the plurality of image frames. The display times of the third group of image frames and the fourth group of image frames are adjacent.

[0023] In one possible implementation of the third aspect, the display periods of the second group of image frames are adjacent to those of the third group of image frames.

[0024] In one possible implementation of the third aspect, the touch electrode array further includes a second TX electrode. During the display period of a first group of image frames, a first touch signal is sent to the first TX electrode, including: during the display period of the first group of image frames, sending the first touch signal to the first TX electrode and sending a third touch signal to the second TX electrode. During the display period of a second group of image frames, a touch signal with a phase offset from the first touch signal is sent to the first TX electrode, including: during the display period of the second group of image frames, sending the touch signal with a phase offset from the first touch signal to the first TX electrode and sending the touch signal with a phase offset from the third touch signal to the second TX electrode.

[0025] In one possible implementation of the third aspect, the third touch signal has a different frequency or phase than the first touch signal.

[0026] In one possible implementation of the third aspect, the frame rate of multiple image frames is greater than or equal to 10 Hz.

[0027] Fourthly, a display module is provided, the display module including the touch device and touch display screen provided in the first aspect or any possible implementation of the first aspect.

[0028] Fifthly, an electronic device is provided, the electronic device including a processor and a display module provided in the fourth aspect.

[0029] It is understood that any of the touch devices, touch methods, display modules or electronic devices provided above are used to perform the corresponding touch devices provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects of the corresponding touch devices provided above, and will not be repeated here. Attached Figure Description

[0030] Figure 1 A schematic diagram of an electronic device provided in an embodiment of this application;

[0031] Figure 2 A schematic diagram of a touch display screen provided in an embodiment of this application;

[0032] Figure 3 A schematic diagram of a touch electrode array provided in an embodiment of this application;

[0033] Figure 4 A schematic diagram of a TX electrode and an RX electrode provided for an embodiment of this application;

[0034] Figure 5 A signal timing method provided in the embodiments of this application Figure 1 ;

[0035] Figure 6 A signal timing method provided in the embodiments of this application Figure 2 ;

[0036] Figure 7 A schematic diagram of a touch device provided in an embodiment of this application. Figure 1 ;

[0037] Figure 8 A signal timing method provided in the embodiments of this application Figure 3 ;

[0038] Figure 9 A signal timing method provided in the embodiments of this application Figure 4 ;

[0039] Figure 10 A schematic diagram of a touch device provided in an embodiment of this application. Figure 2 ;

[0040] Figure 11 A signal timing method provided in the embodiments of this application Figure 5 ;

[0041] Figure 12 A schematic diagram of a touch device provided in an embodiment of this application. Figure 3 ;

[0042] Figure 13 A signal timing method provided in the embodiments of this application Figure 6 ;

[0043] Figure 14 A schematic diagram of a touch device provided in an embodiment of this application. Figure 4 ;

[0044] Figure 15 A schematic diagram of a touch device provided in an embodiment of this application. Figure 5 ;

[0045] Figure 16 This is a flowchart illustrating a touch control method provided in an embodiment of this application. Detailed Implementation

[0046] It should be noted that the terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0047] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0048] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0049] First, the application scenarios of the embodiments of this application will be introduced. The embodiments of this application can be applied to electronic devices with touch display functions. Such electronic devices include, but are not limited to: mobile phones, tablet computers, computers, laptops, cameras, wearable devices, in-vehicle devices, or terminal devices, etc.

[0050] In some possible implementations, such as Figure 1 As shown, the electronic device 1000 includes a system-on-a-chip 100 and internal modules. The internal modules may include, for example, a camera module 110, a communication circuit 120, an interface circuit 130, a power management circuit 140, a battery 150, and a display module 200, etc. It is understandable that... Figure 1 This is just one example; in practice, electronic device 1000 may include more or fewer modules. For example, electronic device 1000 may also include modules such as audio circuitry and sensors. Figure 1 (Not shown). The coupling relationship between the system-on-a-chip 100 and its internal modules described in this application embodiment is merely exemplary, and other coupling methods may exist in practice.

[0051] The System-on-Chip 100 is the core of the Electronic Device 1000, and can integrate a central processing unit (CPU), a graphics processing unit (GPU), an image signal processor (ISP), a neural processing unit (NPU), a microcontroller unit (MCU), memory, a memory controller, and various other functional modules. The System-on-Chip 100 is the control center of the Electronic Device 1000, responsible for handling most of the computing and communication tasks.

[0052] The camera module 110 can be used to capture photos or videos. The camera module 110 may include a camera and related processing circuitry. For example, the camera may include a lens, an image sensor, and an optical image stabilization system, etc. The processing circuitry of the camera module 110 can be used to perform preliminary processing on the images captured by the camera.

[0053] The communication circuit 120 can be used by the electronic device 1000 to communicate wirelessly with other devices. For example, the communication device may include radio frequency circuitry and an antenna, which can communicate with other devices via a cellular network. The communication device may also include wireless fidelity (WiFi) circuitry, Bluetooth (BT) circuitry, and near field communication (NFC) circuitry, etc.

[0054] Interface circuit 130 can be used for wired communication between electronic device 1000 and other devices. For example, interface circuit 130 can be a universal serial bus (USB) interface, a universal asynchronous receiver / transmitter (UART) interface, or other interface circuits.

[0055] The power management circuit 140 can be used to control the charging and discharging process of the battery 150, dynamically adjust the voltage and current, optimize the power consumption of the electronic device 1000, and perform overvoltage or overcurrent protection, etc.

[0056] Display module 200 can be used to display images and user interfaces. Display module 200 can also be referred to as a touch panel. Display module 200 may include a touch display screen 210, a touch device 220, and a display driver device 230. Touch device 220 may include a touch panel integrated circuit (TPIC). Display driver device 230 may include a display driver integrated circuit (DDIC). Touch display screen 210 may include a touch layer and a display layer. The touch layer may specifically include a touch electrode array 211. The display layer may specifically include a display circuit 212. For example, display circuit 212 may be a liquid crystal display (LCD) circuit or an organic light emitting diode (OLED) display circuit 212. Display driver device 230 and touch device 220 are both coupled to touch display screen 210. Display driver device 230 is used to drive display circuit 212 to achieve display function. Touch device 220 is used to control touch electrode array 211 to achieve touch control function. The touch display screen 210 can be a mutual capacitance touch display screen.

[0057] like Figure 2 As shown, taking a mobile phone as an example of an electronic device 1000, in the touch display screen 210, the touch electrode array 211 can be positioned above the display circuit 212. This allows the user to touch the touch electrode array 211, causing a change in the charge on the array. The touch device 220 determines the user's touch location based on this charge change and, in conjunction with the display driver 230, processes the displayed image, enabling the user to operate the screen via touch. It is understood that in practice, the positions of the touch electrode array 211 and the display circuit 212 can be set according to requirements, and it is not required that the touch electrode array 211 be located above the display circuit 212.

[0058] like Figure 3As shown, the touch electrode array 211 includes multiple transmit (TX) electrodes and multiple receive (RX) electrodes. Both the multiple TX electrodes and the multiple RX electrodes are coupled to the touch device 220. The multiple TX electrodes can be arranged in multiple columns, and the multiple RX electrodes can be arranged in multiple rows. In practice, the multiple TX electrodes can also be arranged in multiple rows, and the multiple RX electrodes in multiple columns; this embodiment does not limit this. For example, the multiple TX electrodes may include TX1, TX2, TX3, TX4, TX5, and TX6, and the multiple RX electrodes may include RX1, RX2, RX3, RX4, RX5, and RX6. In practice, the multiple TX electrodes may include more or fewer than six TX electrodes, and the multiple RX electrodes may include more or fewer than six RX electrodes.

[0059] The touch device 220 can be used to send a touch signal to the TX electrode, which can cause a capacitance to be formed between each TX electrode and each RX electrode. For example, multiple TX electrodes and multiple RX electrodes can be located on the same plane, with each TX electrode and each RX electrode in a similar plane. Figure 3 A capacitor is formed at the position of the upper center circle. For example, as... Figure 4 As shown, multiple TX electrodes and multiple RX electrodes can be located on different planes, and each TX electrode and each RX electrode is in a similar plane to... Figure 3 A capacitor is formed at the position of the circle in the lower middle.

[0060] The touch device 220 can be used to detect the electrical signal on the RX electrode. When a user touches the touch electrode array 211, the charge on the RX electrode, which serves as a capacitor plate, changes due to the user's touch. The touch device 220 can detect the change in the electrical signal on the RX electrode, thereby determining the location of the user's touch.

[0061] The touch device 220 can locate the user's touch position in three ways. The first is time-division multiplexing (TDM). The touch device 220 sequentially sends touch signals to multiple TX electrodes at different times. The touch device 220 determines the TX electrode touched by the user based on the timing of the changing electrical signals, and then determines the user's touch position based on the receiving RX electrodes of the changing electrical signals. The second is frequency-division multiplexing (FDM). The touch device 220 sends multiple touch signals of different frequencies to multiple TX electrodes. The touch device 220 determines the TX electrode touched by the user based on the frequency of the changing electrical signals, and then determines the user's touch position based on the receiving RX electrodes of the changing electrical signals. The third is code-division multiplexing (CDM). The touch device 220 sends multiple touch signals of different phases to multiple TX electrodes. The touch device 220 determines the TX electrode touched by the user based on the phase of the changing electrical signals, and then determines the user's touch position based on the receiving RX electrodes of the changing electrical signals.

[0062] The touch device 220 may include a touch controller and an analog front end (AFE). The touch controller can be used to control the AFE to send touch signals to the TX electrode, or to control the AFE to detect electrical signals on the RX electrode. The touch controller can also communicate with the system-on-chip 100. The AFE can convert digital signals suitable for processing by the touch controller to analog signals suitable for the touch electrode array 211 (such as touch signals or electrical signals on the RX electrode).

[0063] As touchscreen displays become increasingly thinner, while providing a better user experience, they also present greater challenges to touch technology. For example... Figure 2 As shown, the distance between the touch electrode array 211 and the cathode of the display circuit 212 is shortened, increasing the coupling capacitance between them. This coupling capacitance causes charge flow between the touch electrode array 211 and the display circuit 212. For example, if the charge in the display circuit 212 flows to the touch electrode array 211 through the coupling capacitance, the touch electrode array 211 may be affected by display noise, making it difficult to detect the user's touch position (i.e., decreased sensitivity) or causing detection errors. Alternatively, if the charge in the touch electrode array 211 flows to the display circuit 212 through the coupling capacitance, the display circuit 212 may be affected by touch interference, causing dynamic horizontal lines (also known as water ripples) on the display screen, impacting the user experience. How to mitigate water ripples is a pressing problem in touch display technology.

[0064] Methods to mitigate water ripples typically involve display and touch-related signals. The timing of these signals will be discussed below.

[0065] The horizontal synchronization signal (Hsync) is used to indicate the start and end of each line of image data displayed on the touch screen 210. For example... Figure 5 As shown in Figure (a), the rising edge of the Hsync signal indicates the start of displaying a line of image data, and the falling edge indicates the end of displaying a line of image data. In practice, considering the transmission of image data, the time period before the falling edge of the Hsync signal, the duration of the low level of the Hsync signal, and the time period before the rising edge of the Hsync signal constitute the horizontal blanking area (Hblank). During the horizontal blanking area, the touch display screen 210 does not display image data. The area between two horizontal blanking areas is the horizontal active display area (Hactive). During the horizontal active display area, the touch display screen 210 displays a line of image data.

[0066] The vertical synchronization signal (Vsync) is used to indicate the start and end of each frame of image data displayed on the touch screen 210. For example... Figure 5 As shown in Figure (b), the rising edge of the Vsync signal indicates the start of displaying a frame of image data, and the falling edge indicates the end of displaying a frame of image data. In practice, considering the transmission of image data, the time period before the falling edge of the Vsync signal, the duration of the low level of the Vsync signal, and the time period before the rising edge of the Vsync signal constitute the frame blanking area (Vblank). During the frame blanking area, the touch display screen 210 does not display image data. The area between two frame blanking areas is the frame active display area (Vactive). During the frame active display area, the touch display screen 210 displays a frame of image data.

[0067] like Figure 6 As shown, the touch signal may include multiple touch frames, and each two adjacent touch frames may have an interval time. Multiple interval times may all be the same, or at least two interval times may be different. Each touch frame may include multiple waveform signals. The waveform signals may be square wave signals, sine wave signals, or other waveform signals. The number of waveform signals in each touch frame may all be the same, or at least two touch frames may have different numbers of waveform signals. For example, each touch frame may include multiple coding processes, with each coding process including multiple waveform signals. Figure 6The diagram illustrates the process of the first, second, third, and fourth layer of masking for a touch frame. In practice, the number of masking layers for a touch frame can be more or less than four.

[0068] The following section will introduce several possible ways to mitigate water ripples, based on the aforementioned signal timing.

[0069] In some possible implementations, the timing of the touch signal transmission can be scheduled to avoid the charging time of the display circuit 212. By preventing the touch signal from affecting the charging of the display circuit 212, the water ripple effect can be mitigated. For example, the charging and discharging process of the display circuit 212 occurs within each Hsync signal cycle. By using the Hsync signal as the cycle for the touch signal, the timing of the touch signal transmission is scheduled to avoid the charging time of the display circuit 212.

[0070] In this embodiment, synchronizing the transmission time of the touch signal to avoid the charging time of the display circuit 212 is relatively complex. Furthermore, when the touch signal period is based on the Hsync signal, the frequency of the touch signal needs to be higher than the horizontal frequency of the display circuit 212, which limits the frequency selection range of the touch signal. In some scenarios, such as those requiring frequency hopping to avoid charger interference noise, the frequency limitation of the touch signal is significant.

[0071] In some other possible implementations, the voltage amplitude of the touch signal can be reduced, thereby reducing the interference of the touch signal on the display circuit 212 and mitigating the water ripple effect.

[0072] In this embodiment, reducing the voltage amplitude of the touch signal may reduce the change in electrical signal on the RX electrode, making it difficult to detect the position of the user's touch and reducing sensitivity.

[0073] In some other possible implementations, the Hsync signal can be used as the period of the touch signal, and the start time of the touch signal can be traversed to experimentally obtain the touch signal with the smallest water ripple.

[0074] In this embodiment, using the Hsync signal as the period of the touch signal requires the touch signal frequency to be higher than the horizontal frequency of the display circuit 212, which limits the frequency selection range of the touch signal. In some scenarios, such as those requiring frequency hopping to avoid charger interference noise, the frequency limitation of the touch signal is significant. Furthermore, different traversal experiments are required for different types of display circuits 212 (e.g., LCD and OLED), resulting in high costs and unstable experimental results with smaller ripple effects.

[0075] In some other possible implementations, the frequency of the touch signal can be iterated to experimentally obtain the touch signal with the smallest water ripple.

[0076] In this embodiment, the frequency of the touch signal is limited. Furthermore, different traversal experiments are required for different types of display circuits 212 (e.g., LCD and OLED), which is costly, and the experimental results with smaller ripples are unstable.

[0077] In some other possible implementations, two touch signals with phase offset can be sent during the display periods of two adjacent sets of image frames, utilizing the persistence of vision effect to reduce the visibility of water ripples to the human eye.

[0078] Based on this, embodiments of this application provide a touch device. This touch device can be... Figure 1 The touch device 220 (e.g., TPIC) is used to couple with the touch display screen 210. The touch device can also be configured in other forms according to actual needs, and this embodiment does not limit this. The touch electrode array 211 of the touch display screen 210 includes a first TX electrode. The touch display screen 210 is used to display multiple image frames, including a first image frame and a second image frame.

[0079] like Figure 7 As shown, the display driving device 230 can be used to send a first display signal to the touch device 220. The first display signal can be used to indicate the display period of the first group of image frames. For example, the first display signal can be a Vsync signal corresponding to the display period of the first group of image frames. The touch device 220 can be used to determine the display period of the first group of image frames based on the first display signal. The display driving device 230 can be used to send image data of the first group of image frames to the display circuit 212 during the display period of the first group of image frames, so that the first group of image frames are displayed on the touch display screen 210. The touch device 220 can be used to send a first touch signal to the first TX electrode during the display period of the first group of image frames.

[0080] The display driving device 230 can also be used to send a second display signal to the touch device 220. The second display signal can be used to indicate the display period of the second group of image frames. For example, the second display signal can be a Vsync signal corresponding to the display period of the second group of image frames. The touch device 220 can also be used to determine the display period of the second group of image frames based on the second display signal. The display driving device 230 can also be used to send image data of the second group of image frames to the display circuit 212 during the display period of the second group of image frames, so that the second group of image frames are displayed on the touch display screen 210. The touch device 220 can also be used to send a touch signal with a phase offset from the first touch signal to the first TX electrode during the display period of the second group of image frames.

[0081] like Figure 8As shown, the first line of signals can be a Vsync signal indicating the start of multiple image frames. The display periods of the first group of image frames and the second group of image frames are adjacent. The human eye has the persistence of vision effect, that is, when the image disappears, the human eye can continue to retain the image for a period of time (e.g., 0.1 to 0.4 seconds). Since the display periods of the first group of image frames and the second group of image frames are adjacent, the human eye can still retain the image of the first group of image frames when it sees the second group of image frames.

[0082] Figure 8 The second row of signals illustrates multiple touch signals without phase offset. For example, during the display periods of the first and second set of image frames, a first touch signal is sent to the first TX electrode. This situation can be referred to as the touch signal being synchronized with a set of image frames (or a set of Vsync signals), i.e., the touch signal is periodic with the display period of a set of image frames. Within the display period of a set of image frames, the touch signal may include an integer number of touch frames (e.g., 4), or the touch signal may include a non-integer number of touch frames (e.g., 4.5). For ease of description, the embodiments of this application are described using an integer number (e.g., 4) as an example.

[0083] Figure 8 The third row of signals illustrates multiple touch signals with phase shifts. For example, during the display period of the first set of image frames, a first touch signal is sent to the first TX electrode, and during the display period of the second set of image frames, a touch signal with a phase shift relative to the first touch signal is sent to the first TX electrode. Similarly, within the display period of a set of image frames, the touch signals may include an integer number of touch frames (e.g., 4), or the touch signals may include a non-integer number of touch frames (e.g., 4.5). For ease of description, this application's embodiments are described using an integer number (e.g., 4) as an example.

[0084] by Figure 8 Taking the dashed circle as an example, it can be seen that during the display period of the second set of image frames, all or part of the signals in the second row (e.g., the first touch signal) are opposite to all or part of the signals in the third row (e.g., touch signals that have a phase offset from the first touch signal). Signal opposites mean that the positive and negative values ​​of the signal levels are opposite, or that the high and low levels are opposite.

[0085] like Figure 9 As shown, for Figure 8 The signals within the dashed circles are illustrated with examples of different phase shifts. Figure 8 The second line of signals (e.g., the first touch signal) is a square wave sgn(-sin(x)) as an example.

[0086] when Figure 8When the third line signal (e.g., a touch signal with a phase offset from the first touch signal) is a square wave sgn(-sin(x+0.25π)), the phase offset is 0.25π. The bold line indicates that a portion of the second line signal is opposite to a portion of the third line signal.

[0087] when Figure 8 When the third row of signals (e.g., touch signals with a phase offset from the first touch signal) is a square wave sgn(-sin(x+0.5π)), the phase offset is 0.5π. The bold line indicates that a portion of the second row of signals is opposite to a portion of the third row of signals.

[0088] when Figure 8 When the third row of signals (e.g., touch signals with a phase offset from the first touch signal) is a square wave sgn(-sin(x+0.75π)), the phase offset is 0.75π. The bold lines indicate that a portion of the second row of signals is opposite to a portion of the third row of signals.

[0089] when Figure 8 When the third row of signals (e.g., touch signals with a phase offset from the first touch signal) is a square wave sgn(-sin(x+π)), the phase offset is π. The bold lines indicate that all signals in the second row are opposite to all signals in the third row.

[0090] when Figure 8 When the third row of signals (e.g., touch signals with a phase offset from the first touch signal) is a square wave sgn(-sin(x+1.25π)), the phase offset is 1.25π. The bold lines indicate that a portion of the second row of signals is opposite to a portion of the third row of signals.

[0091] when Figure 8 When the third row of signals (e.g., touch signals with a phase offset from the first touch signal) is a square wave sgn(-sin(x+1.5π)), the phase offset is 1.5π. The bold lines indicate that a portion of the second row of signals is opposite to a portion of the third row of signals.

[0092] when Figure 8 When the third row of signals (e.g., touch signals with a phase offset from the first touch signal) is a square wave sgn(-sin(x+1.75π)), the phase offset is 1.75π. The bold line indicates that a portion of the second row of signals is opposite to a portion of the third row of signals.

[0093] It can be seen that the closer the phase shift is to half the period π of the square wave sgn(-sin(x)), the more the signal is reversed.

[0094] For example, the bright (or dark) lines of the water ripples caused by the touch signal can be neutralized and canceled out by the dark (or bright) lines of the water ripples caused by the opposite signal of the touch signal, thereby reducing the water ripples.

[0095] Because the human eye can retain the image of the first set of image frames when it sees the second set of image frames, when the human eye sees the bright (or dark) lines of the water ripples caused by the first touch signal, it can also see the dark (or bright) lines of the water ripples caused by the touch signal that has a phase offset from the first touch signal.

[0096] Since the touch signal has a phase offset from the first touch signal and is opposite to all or part of the first touch signal, all or part of the water ripples seen by the human eye are neutralized and canceled out.

[0097] In this embodiment, the display periods of the first set of image frames and the second set of image frames are adjacent, so when the human eye sees the second set of image frames, the image of the first set of image frames can still be retained. Since all (or part) of the lines of the ripples caused by the touch signal, which has a phase offset from the first touch signal, have opposite brightness to all (or part) of the lines of the ripples caused by the first touch signal, the ripples are completely (or partially) canceled out. This can reduce the ripples in the displayed image and improve the user experience. Furthermore, this embodiment does not require the transmission time of the touch signal to avoid the charging time of the display circuit 212, making it simpler. It also does not require limiting the frequency of the touch signal, thus increasing the frequency selection range of the touch signal. Moreover, it is not obtained through ergonomic experiments, and this method can be used for different types of display circuits 212, resulting in lower cost and more stable ripple reduction. Finally, it does not require reducing the voltage amplitude of the touch signal, thus ensuring touch sensitivity.

[0098] In some examples, the display period of the first set of image frames can refer to the effective display area of ​​the first set of image frames. The display period of the second set of image frames can refer to the effective display area of ​​the second set of image frames. There are no ripples in the frame blanking area between the two sets of image frames, therefore the touch signal does not need to have a phase shift.

[0099] Alternatively, the display period of the first set of image frames can refer to the time from the start of display (e.g., rising edge) to the end of display (e.g., falling edge) of the first set of image frames indicated by the Vsync signal. The display period of the second set of image frames can refer to the time from the start of display (e.g., rising edge) to the end of display (e.g., falling edge) of the second set of image frames indicated by the Vsync signal. There is no ripple effect at the low level of Vsync between the two sets of image frames, therefore the touch signal does not need to have a phase shift.

[0100] Alternatively, the display period of the first set of image frames can refer to the time from when the first set of image frames, as indicated by the Vsync signal, begins to be displayed (e.g., the rising edge) until when the second set of image frames begins to be displayed (e.g., the rising edge). Even if there is no water ripple time, the above-mentioned phase shift condition is still satisfied.

[0101] In some possible implementations, the touch signal that has a phase offset from the first touch signal is a signal with a phase opposite to the first touch signal. Figure 9 It can be seen that the closer the phase shift is to half the period of the waveform signal of the touch frame, the more the signal is reversed. When the phases are opposite, the entire signal is reversed.

[0102] In this embodiment, the touch signal corresponding to the first set of image frames is out of phase with the touch signal corresponding to the second set of image frames, that is, all the signals of the two touch signals are opposite, which can reduce the water ripples of the first set of image frames and the second set of image frames to the greatest extent.

[0103] In some possible implementations, both the first group of image frames and the second group of image frames include M image frames, where M is an integer greater than or equal to 1.

[0104] For example, both the first and second group of image frames consist of one image frame. The first and second group of image frames are displayed in adjacent time periods, meaning that the display periods of two image frames in these two groups are adjacent. For example, the first group of image frames consists of odd-numbered frames, and the second group consists of even-numbered frames.

[0105] For example, both the first group of image frames and the second group of image frames include multiple image frames. The display time periods of the first group of image frames and the second group of image frames are adjacent, which can mean that the display time period of the last image frame of the first group of image frames is adjacent to that of the first image frame of the second group of image frames.

[0106] In this embodiment, since the persistence of vision in the human eye can last for a period of time (e.g., 0.1 to 0.4 seconds), and the display time of a single image frame is usually much shorter than this period, several image frames can be used as the first group of image frames. Typically, the display time of the first group of image frames is shorter than this period. The fewer the number of image frames (M) in the first group, the shorter the display time of the first group, and the better the effect of mitigating water ripples.

[0107] In some possible implementations, the frame rate of the multiple image frames is greater than or equal to 10 Hz. In this implementation, the higher the frame rate of the multiple image frames, for example, greater than or equal to 10 Hz, the shorter the display period of the first set of image frames, and the better the effect of water ripple reduction.

[0108] In some possible implementations, in addition to the first and second set of image frames, two touch signals with phase offset can be sent during the display periods of other two adjacent sets of image frames.

[0109] In some examples, the multiple image frames also include a third image frame and a fourth image frame. The display periods of the third group of image frames are adjacent to those of the fourth group of image frames.

[0110] like Figure 10 and Figure 11 As shown, the display driving device 230 can be used to send a third display signal to the touch device 220. The third display signal can be used to indicate the display period of the third group of image frames. For example, the third display signal can be a Vsync signal corresponding to the display period of the third group of image frames. The touch device 220 can be used to determine the display period of the third group of image frames based on the third display signal. The display driving device 230 can be used to send image data of the third group of image frames to the display circuit 212 during the display period of the third group of image frames, so that the third group of image frames are displayed on the touch display screen 210. The touch device 220 can be used to send a second touch signal to the first TX electrode during the display period of the third group of image frames.

[0111] The display driving device 230 can also be used to send a fourth display signal to the touch device 220. The fourth display signal can be used to indicate the display period of the fourth group of image frames; for example, the fourth display signal can be a Vsync signal corresponding to the display period of the fourth group of image frames. The touch device 220 can also be used to determine the display period of the fourth group of image frames based on the fourth display signal. The display driving device 230 can also be used to send image data of the fourth group of image frames to the display circuit 212 during the display period of the fourth group of image frames, so that the fourth group of image frames is displayed on the touch display screen 210. The touch device 220 can also be used to send a touch signal with a phase offset from the second touch signal to the first TX electrode during the display period of the fourth group of image frames.

[0112] The descriptions, functions, and effects of the third group of image frames, the fourth group of image frames, the second touch signal, and the phase shift can be referenced to the descriptions, functions, and effects of the first group of image frames, the second group of image frames, the first touch signal, and the aforementioned phase shift. These will not be repeated in the embodiments of this application. In practice, the aforementioned phase shift scheme can be used for the fifth group of image frames, the sixth group of image frames, and more image frames displayed on the touch screen 210.

[0113] In this embodiment, in addition to the first and second sets of image frames, the persistence of vision effect can also be used in other adjacent sets of image frames (such as the third and fourth image frames) to reduce the visibility of water ripples to the human eye and improve the user experience.

[0114] For example, the display periods of the second group of image frames and the third group of image frames are adjacent. In this embodiment, four consecutive groups of image frames, from the first group to the fourth group, can reduce water ripples, thereby improving the user's continuous viewing experience.

[0115] For example, the waveform, phase, and frequency of the first touch signal can be the same as the waveform, phase, and frequency of the second touch signal, thus simplifying the way the touch device 220 sends the touch signal.

[0116] In some possible implementations, in addition to the first TX electrode, two touch signals with phase offset can be sent to other TX electrodes during the display periods of two adjacent sets of image frames.

[0117] In some examples, the touch electrode array 211 may also include a second TX electrode. The first TX electrode and the second TX electrode may be TX electrodes in different columns (or different rows), for example, the first TX electrode is... Figure 3 In TX1, the second TX electrode is Figure 3 TX2 in the middle.

[0118] like Figure 12 and Figure 13 As shown, the touch device 220 can be used to send a first touch signal to the first TX electrode and a third touch signal to the second TX electrode during the display period of the first set of image frames. The touch device 220 can also be used to send a touch signal with a phase offset from the first touch signal to the first TX electrode and a touch signal with a phase offset from the third touch signal to the second TX electrode during the display period of the second set of image frames.

[0119] The description, function, and effect of the third touch signal and phase shift can be referred to the description, function, and effect of the first touch signal and the aforementioned phase shift, and will not be repeated in this embodiment. In practice, the aforementioned phase shift scheme can be applied to the third TX electrode, the fourth TX electrode, and more TX electrodes of the touch electrode array 211.

[0120] In this embodiment, in addition to the first TX electrode, the persistence of vision effect can also be used to reduce the visibility of water ripples to the human eye and improve the user experience for other TX electrodes (such as the second TX electrode).

[0121] For example, the third touch signal has a different frequency or phase than the first touch signal. In this embodiment, since the third touch signal has a different frequency than the first touch signal, the first TX electrode and the second TX electrode can be distinguished by frequency division multiplexing. Since the third touch signal has a different phase than the first touch signal, the first TX electrode and the second TX electrode can be distinguished by code division multiplexing.

[0122] The following example uses the code division multiple access (CDMA) driving method (i.e., code division multiplexing). Figure 3 Taking the touch electrode array 211 as an example, for the sake of brevity, only the following description is provided. Figure 3 The touch electrode array 211 has TX1, TX2, TX3 and TX4, while the principles of TX5 and TX6 are similar, and will not be described in detail here.

[0123] The encoding matrix of the touch device 220 includes H and -H.

[0124]

[0125] In this system, the four columns of the encoding matrix H correspond to four TX electrodes, such as TX1, TX2, TX3, and TX4. The four numbers in each column represent that the touch signal is encoded four times per touch frame, for example... Figure 6 The diagram shows four coding operations. 1 and -1 can represent opposite phases.

[0126] During the display period of the first set of image frames, the touch device 220 sends touch signals to TX1, TX2, TX3 and TX4 according to the encoding matrix H.

[0127] For example, the first column of the encoding matrix H, 1, 1, 1, 1, can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX1, which are sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(x)).

[0128] The 1, -1, 1, -1 in the second column of the encoding matrix H can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX2 as sgn(-sin(x)), sgn(-sin(-x)), sgn(-sin(x)), sgn(-sin(-x)).

[0129] The 1, 1, -1, -1 in the third column of the encoding matrix H can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX3 as sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(-x)).

[0130] The 1, -1, -1, 1 in the fourth column of the encoding matrix H can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX4 as sgn(-sin(x)), sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(-x)).

[0131] Thus, when the touch device 220 receives a change in the electrical signal of an RX electrode, it can analyze which code corresponds to the phase of the change, thereby the touch device 220 can know which TX electrode the intersection of the RX and the TX is the position touched by the user.

[0132] During the display period of the second set of image frames, the touch device 220 sends touch signals to TX1, TX2, TX3 and TX4 according to the encoding matrix -H.

[0133] For example, -1, -1, -1, -1 in the first column of the encoding matrix -H can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX1 as sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(-x)).

[0134] The second column of the encoding matrix H, -1, 1, -1, 1, can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX2, which are sgn(-sin(-x)), sgn(-sin(x)), sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(x)).

[0135] The third column of the encoding matrix H, -1, -1, 1, 1, can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX3 as sgn(-sin(-x)), sgn(-sin(-x)), sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(x)).

[0136] The fourth column of the encoding matrix H, -1, 1, 1, -1, can represent the waveforms of the four coding operations of each touch frame of the touch signal sent to TX4 as sgn(-sin(-x)), sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(x)), sgn(-sin(-x)).

[0137] Thus, the touch device 220 can send two touch signals with opposite phases to each TX electrode during the display periods of two adjacent sets of image frames.

[0138] In some possible implementations, the touch signal with phase offset can be achieved using a phase offset device.

[0139] In some examples, such as Figure 14 As shown, the touch device 220 includes a first signal output terminal, a first switch K11, a second switch K21, and a phase shifting device 1. The touch device 220 may also include a touch chip 221.

[0140] The first signal output terminal and the input terminal of the phase shifting device 1 can both be coupled to the first terminal of the first switch K11. The first signal output terminal can be the output terminal of the touch chip 221, used to output the first touch signal.

[0141] The first signal output terminal of the phase shifting device 1 can be coupled to the first terminal of the second switch K21. The phase shifting device 1 can be used to change the phase of the signal.

[0142] The second terminal of the first switch K11 can be used to couple the first TX electrode. The second terminal of the first switch K11 can also be used to output the first touch signal.

[0143] The second terminal of the second switch K21 can be used to couple the first TX electrode. The second terminal of the second switch K21 can also be used to output a touch signal that has a phase offset from the first touch signal.

[0144] During the display period of the first set of image frames, the touch device 220 can control the first switch K11 to be turned on and the second switch K21 to be turned off, thereby sending the first touch signal to the first TX electrode.

[0145] During the display period of the second set of image frames, the touch device 220 can control the second switch K21 to be turned on and the first switch K11 to be turned off, thereby sending a touch signal with a phase offset from the first touch signal to the first TX electrode.

[0146] In this embodiment, adding a first switch, a second switch, and a phase offset device can achieve the transmission of touch signals with phase offset, resulting in a simple hardware structure and low circuit cost.

[0147] For example, the phase shifting device is an inverter or a phase shifter. When the phase shifting device is an inverter, the aforementioned phase shift specifically refers to the phase being reversed. In this embodiment, the inverter or phase shifter has low cost and a simple circuit structure.

[0148] In some other examples, such as Figure 15 As shown, in Figure 14Based on this, we will take TX1 as the first TX electrode and TX2 as the second TX electrode as an example.

[0149] For TX2, the touch device 220 also includes a second signal output terminal ( Figure 15 (Not shown), first switch K12, second switch K22, and phase shifting device 2. Their coupling relationship can be referred to... Figure 15 The coupling relationship in.

[0150] For TX3, the touch device 220 also includes a third signal output terminal ( Figure 15 (Not shown), first switch K13, second switch K23, and phase shifting device 3. Their coupling relationship can be referred to... Figure 15 The coupling relationship in.

[0151] For TX4, the touch device 220 also includes a fourth signal output terminal ( Figure 15 (Not shown), first switch K14, second switch K24, and phase shifting device 4. Their coupling relationship can be referred to... Figure 15 The coupling relationship in.

[0152] For TX5, the touch device 220 also includes a fifth signal output terminal ( Figure 15 (Not shown), first switch K15, second switch K25, and phase shifting device 5. Their coupling relationship can be referred to... Figure 15 The coupling relationship in.

[0153] For TX6, the touch device 220 also includes a sixth signal output terminal ( Figure 15 (Not shown), first switch K16, second switch K26, and phase shifting device 6. Their coupling relationship can be referred to... Figure 15 The coupling relationship in.

[0154] Understandable. Figure 15 This is just one example. If in practice the touch electrode array 211 includes more or fewer TX electrodes, then the touch device 220 includes more or more phase shifting devices and switches.

[0155] This application also provides a touch method. This touch method is applied to a touch electrode array 211 of a touch display screen 210. The touch electrode array 211 includes a first transmitting (TX) electrode. The touch display screen 210 is used to display multiple image frames. For example... Figure 16 As shown, this touch method can be used by Figures 7-15 Taking the described touch device 220 as an example, the touch method includes one or more of the following steps:

[0156] S110: During the display period of the first group of image frames of multiple image frames, the touch device 220 sends a first touch signal to the first TX electrode.

[0157] S120: During the display period of the second group of image frames among multiple image frames, the touch device 220 sends a touch signal with a phase offset from the first touch signal to the first TX electrode. The display periods of the first group of image frames and the second group of image frames are adjacent.

[0158] In some possible implementations, the touch signal that has a phase offset from the first touch signal is a signal with the opposite phase to the first touch signal.

[0159] In some possible implementations, both the first group of image frames and the second group of image frames include M image frames, where M is an integer greater than or equal to 1.

[0160] In some possible implementations, the touch method may further include one or more of the following steps:

[0161] S130: During the display period of the third group of image frames in a plurality of image frames, the touch device 220 sends a second touch signal to the first TX electrode.

[0162] S140: During the display period of the fourth group of image frames in a plurality of image frames, the touch device 220 sends a touch signal with a phase offset from the second touch signal to the first TX electrode. The display times of the third group of image frames and the fourth group of image frames are adjacent.

[0163] In some possible implementations, the display periods of the second set of image frames are adjacent to those of the third set of image frames.

[0164] In some possible implementations, the touch electrode array 211 may also include a second TX electrode.

[0165] S110 may specifically include: during the display period of the first set of image frames, the touch device 220 sends a first touch signal to the first TX electrode and a third touch signal to the second TX electrode.

[0166] S120 may specifically include: during the display period of the second set of image frames, the touch device 220 sends a touch signal with a phase offset from the first touch signal to the first TX electrode, and sends a touch signal with a phase offset from the third touch signal to the second TX electrode.

[0167] In some possible implementations, the third touch signal has a different frequency or phase than the first touch signal.

[0168] In some possible implementations, the frame rate of multiple image frames is greater than or equal to 10 Hz.

[0169] It is understood that the above-described touch method can be used to perform the corresponding functions using the touch device 220 described in the aforementioned embodiment of touch device 220. Since the functions and effects have been described in detail in the aforementioned embodiment of touch device 220, they will not be repeated here.

[0170] It is understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0171] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0172] In the several embodiments provided in this application, it should be understood that the disclosed apparatus, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or modules may be electrical, mechanical, or other forms.

[0173] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located on one device or distributed across multiple devices. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0174] In addition, the functional modules in the various embodiments of this application can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0175] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0176] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A touch device, characterized in that, The touch device is used to couple with a touch display screen, the touch display screen including a touch electrode array; the touch electrode array includes a first transmitting TX electrode; The touch screen is used to display multiple image frames; the touch device is used for: During the display period of the first group of image frames of the plurality of image frames, a first touch signal is sent to the first TX electrode; During the display period of the second group of image frames of the plurality of image frames, a touch signal with a phase offset from the first touch signal is sent to the first TX electrode; The first group of image frames and the second group of image frames are displayed in adjacent time periods.

2. The touch device according to claim 1, characterized in that, The touch signal that has a phase offset from the first touch signal is a signal whose phase is opposite to that of the first touch signal.

3. The touch device according to claim 1 or 2, characterized in that, Both the first group of image frames and the second group of image frames include M image frames, where M is an integer greater than or equal to 1.

4. The touch device according to any one of claims 1-3, characterized in that, The touch device includes a signal output terminal, a first switch, a second switch, and a phase shifting device; the phase shifting device is used to change the phase of the signal. The signal output terminal and the input terminal of the phase shifting device are both coupled to the first terminal of the first switch; the signal output terminal of the phase shifting device is coupled to the first terminal of the second switch. The second terminal of the first switch is used to output the first touch signal; the second terminal of the second switch is used to output a touch signal that has a phase offset from the first touch signal.

5. The touch device according to claim 4, characterized in that, The phase shifting device is an inverter or a phase shifter.

6. The touch device according to any one of claims 1-5, characterized in that, The touch device is also used for: During the display period of the third group of image frames in the plurality of image frames, a second touch signal is sent to the first TX electrode; During the display period of the fourth group of image frames in the plurality of image frames, a touch signal with a phase offset from the second touch signal is sent to the first TX electrode; The third group of image frames is displayed at adjacent times to the fourth group of image frames.

7. The touch device according to claim 6, characterized in that, The display time periods of the second group of image frames are adjacent to those of the third group of image frames.

8. The touch device according to any one of claims 1-7, characterized in that, The touch electrode array further includes a second TX electrode; the touch device is specifically used for: During the display period of the first set of image frames, a first touch signal is sent to the first TX electrode and a third touch signal is sent to the second TX electrode, respectively; During the display period of the second set of image frames, a touch signal with a phase offset from the first touch signal is sent to the first TX electrode, and a touch signal with a phase offset from the third touch signal is sent to the second TX electrode.

9. The touch device according to claim 8, characterized in that, The third touch signal has a different frequency or phase than the first touch signal.

10. The touch device according to any one of claims 1-9, characterized in that, The frame rate of the plurality of image frames is greater than or equal to 10 Hz.

11. A touch device, characterized in that, The touch device is used to control the touch electrode array; The touch device includes a signal output terminal, a first switch, a second switch, and a phase shifting device; the phase shifting device is used to change the phase of the signal. The signal output terminal and the input terminal of the phase shifting device are both coupled to the first terminal of the first switch; the signal output terminal of the phase shifting device is coupled to the first terminal of the second switch. The second end of the first switch and the second end of the second switch are both used to couple with the touch electrode array.

12. The touch device according to claim 11, characterized in that, The phase shifting device is an inverter or a phase shifter.

13. A touch control method, characterized in that, The touch control method is applied to the touch electrode array of a touch display screen; The touch electrode array includes a first transmitting TX electrode; The touch screen is used to display multiple image frames; The touch method includes: During the display period of the first group of image frames of the plurality of image frames, a first touch signal is sent to the first TX electrode; During the display period of the second group of image frames of the plurality of image frames, a touch signal with a phase offset from the first touch signal is sent to the first TX electrode; The first group of image frames and the second group of image frames are displayed in adjacent time periods.

14. The touch method according to claim 13, characterized in that, The touch signal that has a phase offset from the first touch signal is a signal whose phase is opposite to that of the first touch signal.

15. The touch method according to claim 13 or 14, characterized in that, Both the first group of image frames and the second group of image frames include M image frames, where M is an integer greater than or equal to 1.

16. The touch method according to any one of claims 13-15, characterized in that, The touch method also includes: During the display period of the third group of image frames in the plurality of image frames, a second touch signal is sent to the first TX electrode; During the display period of the fourth group of image frames in the plurality of image frames, a touch signal with a phase offset from the second touch signal is sent to the first TX electrode; The third group of image frames is displayed at adjacent times to the fourth group of image frames.

17. The touch method according to claim 16, characterized in that, The display time periods of the second group of image frames are adjacent to those of the third group of image frames.

18. The touch method according to any one of claims 13-17, characterized in that, The touch electrode array also includes a second TX electrode; During the display period of the first group of image frames in the plurality of image frames, sending a first touch signal to the first TX electrode includes: During the display period of the first set of image frames, a first touch signal is sent to the first TX electrode and a third touch signal is sent to the second TX electrode, respectively; During the display period of the second group of image frames in the plurality of image frames, sending a touch signal with a phase offset from the first touch signal to the first TX electrode includes: During the display period of the second set of image frames, a touch signal with a phase offset from the first touch signal is sent to the first TX electrode, and a touch signal with a phase offset from the third touch signal is sent to the second TX electrode.

19. The touch method according to claim 18, characterized in that, The third touch signal has a different frequency or phase than the first touch signal.

20. The touch method according to any one of claims 13-19, characterized in that, The frame rate of the plurality of image frames is greater than or equal to 10 Hz.

21. A display module, characterized in that, The display module includes a touch device and a touch display screen as described in any one of claims 1-12.

22. An electronic device, characterized in that, The electronic device includes a processor and a display module as described in claim 21.

Images