Touch chip, touch processing method and touch display apparatus

Abstract

The present application relates to the technical field of chips. Provided in the embodiments are a touch chip, a touch processing method and a touch display apparatus, which ameliorate the problems of high design costs and high manufacturing costs of touch chips. The specific solution is: the touch chip is applied to a floating conductor touch scenario; the touch chip comprises: a mutual capacitance data acquisition circuit, a mutual capacitance data processing circuit and a compensation circuit; the mutual capacitance data acquisition circuit is used for acquiring a mutual capacitance signal generated when a floating conductor is in contact with a touch screen; the mutual capacitance data processing circuit is used for processing the mutual capacitance signal to obtain a mutual capacitance image; and, in different touch modes of the floating conductor, the compensation circuit is used for calculating compensation values on the basis of expected mutual capacitance change quantity values corresponding to the touch modes and the received mutual capacitance signal and, on the basis of the compensation values, compensating the mutual capacitance image to obtain a compensated mutual capacitance image. The embodiments of the present application are used for processes in which touch chips acquire mutual capacitance images.

Description

Touch chip, touch processing method and touch display device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 21, 2024, with application number 202410194956.3 and application name “Touch chip, touch processing method and touch display device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of chip technology, and in particular to a touch chip, a touch processing method, and a touch display device. Background Art

[0003] With the development of screen touch technology, touch chips need to meet not only the most basic performance indicators such as click and stroke, but also other scenario requirements, such as hover touch scenario and water damage scenario. The common feature of hover touch scenario and water damage scenario is that both the human body and the water damage are conductors and are not adequately grounded.

[0004] To address issues caused by floating touch and water stains, self-capacitance and mutual-capacitance signals are often required for scene recognition and signal compensation. In touch chips, analog circuits must design corresponding drive and receiving circuits for mutual-capacitance and self-capacitance signals. Digital circuits also need to allocate acquisition time and data storage space for both signals. The system layer needs to calculate the overhead of self-capacitance and mutual-capacitance signals. Understandably, scenario-based demands increase the design and manufacturing costs of touch chips. Summary of the Invention

[0005] The embodiments of the present application provide a touch chip, a touch processing method, and a touch display device, which improve the problems of high design cost and manufacturing cost of the touch chip.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions.

[0007] In a first aspect, embodiments of the present application provide a touch control chip for use in suspended conductor touch control scenarios. The touch control chip includes a mutual capacitance data acquisition circuit, a mutual capacitance data processing circuit, and a compensation circuit. The mutual capacitance data acquisition circuit is configured to acquire a mutual capacitance signal when a suspended conductor contacts a touch screen. The mutual capacitance data processing circuit is configured to process the mutual capacitance signal to obtain a mutual capacitance image. The compensation circuit is configured to calculate compensation values ​​based on expected mutual capacitance variations corresponding to different touch control modes of the suspended conductor and the received mutual capacitance signal, and to compensate the mutual capacitance image based on the compensation values ​​to obtain a compensated mutual capacitance image.

[0008] Thus, in the touch chip provided by the embodiments of the present application, a mutual capacitance signal is acquired by a mutual capacitance data acquisition circuit, and the mutual capacitance signal is processed by a mutual capacitance data processing circuit to obtain a mutual capacitance image. The compensation circuit then identifies the touch mode and calculates a compensation value based on the expected mutual capacitance variation corresponding to the touch mode and the mutual capacitance signal. The mutual capacitance image is then compensated to obtain a compensated mutual capacitance image. The touch chip provided by the embodiments of the present application is based solely on a mutual capacitance touch path, without relying on a self-capacitance touch path. This reduces the design and manufacturing costs of the touch chip while compensating the mutual capacitance image to meet touch control requirements.

[0009] In one possible design, the compensation circuit is further configured to obtain a capacitance signal of the suspended conductor relative to ground based on the mutual capacitance signal, a first capacitance signal, and a second capacitance signal. The first capacitance signal includes capacitance data between the suspended conductor and a first electrode of the touch screen, and the second capacitance signal includes capacitance data between the suspended conductor and a second electrode of the touch screen. Thus, the touch control chip provided in embodiments of the present application can determine the degree of suspension of the suspended conductor based on the capacitance signal relative to ground of the suspended conductor, thereby determining the touch mode corresponding to the suspended conductor, and calculate a compensation value based on the expected mutual capacitance change corresponding to the touch mode and the mutual capacitance signal.

[0010] In one possible design, when the ground capacitance signal of the suspended conductor is less than a first threshold value, the touch mode of the suspended conductor is a water spot mode. The compensation circuit is specifically used to calculate a compensation value based on the expected value of the mutual capacitance change corresponding to the water spot mode and the received mutual capacitance signal, and compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image. Therefore, the touch chip provided in the embodiment of the present application can realize the recognition of the scene where the suspended conductor is a water spot, and compensate the mutual capacitance image obtained in the water spot mode, which can improve the accuracy of the touch chip. In addition, the touch chip provided in the embodiment of the present application only receives the mutual capacitance signal for subsequent processing. On the premise of compensating the mutual capacitance image to meet the touch requirements, the complexity of the touch chip can be simplified.

[0011] In one possible design, when the ground capacitance signal of the suspended conductor is greater than or equal to a first threshold and less than a second threshold, the touch mode of the suspended conductor is a suspended touch mode. The compensation circuit is specifically used to calculate a compensation value based on the expected value of the mutual capacitance change corresponding to the suspended touch mode and the received mutual capacitance signal, and compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image. Therefore, the touch chip provided in the embodiment of the present application can realize the recognition of the suspended touch scene of the suspended conductor and compensate the mutual capacitance image obtained in the suspended touch mode, which can improve the accuracy of the touch chip. In addition, the touch chip provided in the embodiment of the present application only receives the mutual capacitance signal for subsequent processing, which can simplify the complexity of the touch chip.

[0012] In one possible design, when the ground capacitance signal of the suspended conductor is greater than or equal to a second threshold, the touch mode of the suspended conductor is a ground touch mode. The compensation circuit is specifically configured to calculate a compensation value based on an expected value of the mutual capacitance change corresponding to the ground touch mode and a received mutual capacitance signal, and to compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image. Thus, the touch chip provided in the embodiment of the present application can recognize a ground touch scenario of a suspended conductor and compensate for the mutual capacitance image obtained in the suspended touch mode, thereby improving the accuracy of the touch chip. Furthermore, the touch chip provided in the embodiment of the present application only receives the mutual capacitance signal for subsequent processing, which can simplify the complexity of the touch chip.

[0013] In a possible design, the touch control chip further includes a mutual capacitance data storage circuit, which is used to store a mutual capacitance image.

[0014] In a second aspect, embodiments of the present application provide a touch processing method, which is applied to a touch chip. The touch chip includes a mutual capacitance data acquisition circuit, a mutual capacitance data processing circuit, and a compensation circuit. The method includes: the mutual capacitance data acquisition circuit acquires a mutual capacitance signal when a suspended conductor contacts the touch screen. The mutual capacitance data processing circuit processes the mutual capacitance signal to obtain a mutual capacitance image. Under different touch modes of the suspended conductor, the compensation circuit calculates a compensation value based on an expected value of the mutual capacitance change corresponding to the touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0015] In one possible design, the touch processing method also includes: the compensation circuit obtains a capacitance signal of the suspended conductor to the ground based on the mutual capacitance signal, the first capacitance signal and the second capacitance signal, the first capacitance signal includes capacitance data between the suspended conductor and the first electrode of the touch screen, and the second capacitance signal includes capacitance data between the suspended conductor and the second electrode of the touch screen.

[0016] In one possible design, when the ground capacitance signal of the suspended conductor is less than a first threshold, the touch mode of the suspended conductor is a water spot mode. The compensation circuit calculates a compensation value based on an expected value of the mutual capacitance change corresponding to the touch mode and a received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image. This includes: the compensation circuit calculates a compensation value based on the expected value of the mutual capacitance change corresponding to the water spot mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0017] In one possible design, when the ground capacitance signal of the suspended conductor is greater than or equal to a first threshold and less than a second threshold, the touch mode of the suspended conductor is a suspended touch mode. The compensation circuit calculates a compensation value based on an expected value of a mutual capacitance change corresponding to the touch mode and a received mutual capacitance signal, and compensates a mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image. This includes: the compensation circuit calculates a compensation value based on the expected value of a mutual capacitance change corresponding to the suspended touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0018] In one possible design, when the ground capacitance signal of the suspended conductor is greater than or equal to a second threshold, the touch mode of the suspended conductor is a ground touch mode. The compensation circuit calculates a compensation value based on an expected value of the mutual capacitance change corresponding to the touch mode and a received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image. This includes: the compensation circuit calculates a compensation value based on the expected value of the mutual capacitance change corresponding to the ground touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0019] In a possible design, the touch chip further includes a mutual capacitance data storage circuit, and the method further includes: the mutual capacitance data storage circuit storing the mutual capacitance image.

[0020] The beneficial effects of the second aspect can be found in the description of the first aspect.

[0021] In a third aspect, an embodiment of the present application provides a touch display device, which includes the touch chip and touch screen according to the first aspect, and the touch chip and touch screen are electrically connected.

[0022] In a fourth aspect, an embodiment of the present application provides an electronic device comprising a processor and a memory, wherein the memory and the processor are coupled, the memory is used to store computer instructions, and the processor is used to execute computer instructions to implement the touch processing method in any possible implementation method of the second aspect.

[0023] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, comprising computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the touch processing method in any possible implementation of the second aspect.

[0024] In a sixth aspect, an embodiment of the present application provides a computer program product. When the computer program product runs on a computer or a processor, it enables the computer or the processor to execute the touch processing method in any possible implementation of the second aspect above.

[0025] It can be understood that any of the touch chips, touch display devices, electronic devices, computer-readable storage media or computer program products provided above can be applied to the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding touch chips, and will not be repeated here.

[0026] These and other aspects of the present application will become more readily apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a processing flow chart of a touch control chip provided in an embodiment of the present application;

[0028] FIG2 is a comparison diagram of a touch image signal provided by an embodiment of the present application;

[0029] FIG3 is a flow chart of a signal compensation technology provided by an embodiment of the present application;

[0030] FIG4 is a flow chart of another signal compensation technology provided by an embodiment of the present application;

[0031] FIG5 is a schematic structural diagram of a touch control chip provided in an embodiment of the present application;

[0032] FIG6 is a schematic diagram of the degree of suspension in various scenarios provided by an embodiment of the present application;

[0033] FIG7 is a schematic structural diagram of a capacitance model of a suspended conductor provided in an embodiment of the present application;

[0034] FIG8 is a schematic structural diagram of another touch control chip provided in an embodiment of the present application;

[0035] FIG9 is a flowchart of a touch processing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] For ease of understanding, some examples of concepts related to the embodiments of this application are provided for reference as follows:

[0037] 1. Self-capacitive screen, that is, an array of horizontal electrodes and vertical electrodes is made on the glass surface using transparent conductive materials such as indium tin oxide (ITO). When the user's touch is detected, the self-capacitive screen detects the arrays of horizontal electrodes and vertical electrodes in turn, and determines the horizontal and vertical coordinates of the touch position according to the capacitance changes before and after the touch. This scanning method is called "self-capacitive scanning method", that is, the touch point is projected to the X-axis and Y-axis directions of the self-capacitive screen respectively, and then the coordinates of the touch point in the X-axis and Y-axis directions are calculated respectively to obtain the position of the touch point on the self-capacitive screen. Assuming that the self-capacitive screen includes M horizontal scanning electrodes and N vertical scanning electrodes, the number of times the self-capacitive screen needs to be scanned using the self-capacitive scanning method is M+N times.

[0038] 2. Mutual capacitance screen, that is, an array of horizontal electrodes and vertical electrodes is made on the glass surface using transparent conductive materials such as indium tin oxide (ITO). The difference between the mutual capacitance screen and the self-capacitance screen is that a capacitor is formed at the intersection of the horizontal electrode and the vertical electrode, that is, the horizontal electrode and the vertical electrode constitute the two poles of the capacitor respectively. When the user's touch is detected, it affects the coupling between the two electrodes (horizontal electrode and vertical electrode) that constitute the capacitor near the touch point, thereby changing the capacitance between the two electrodes. When detecting the size of the mutual capacitance, each horizontal electrode sends a driving signal in turn, and all the vertical electrodes receive the signal at the same time, so that the capacitance value at the intersection of all horizontal electrodes and vertical electrodes can be obtained, that is, the capacitance value on the two-dimensional plane of the mutual capacitance screen. This scanning method is called "mutual capacitance scanning method", that is, the coordinates of each touch point can be calculated based on the change in the capacitance value on the two-dimensional plane of the mutual capacitance screen.

[0039] 3. Self-capacitance signal, the capacitance between the horizontal electrode and the ground, or the capacitance between the vertical electrode and the ground, where the horizontal electrode and the vertical electrode have their own capacitance values ​​respectively.

[0040] 4. Mutual capacitance signal, the capacitance between the horizontal electrode and the vertical electrode.

[0041] 5. Grayscale, which is the different brightness levels from darkest to brightest. Taking an 8-bit panel as an example, the panel can have 256 brightness levels, that is, 256 grayscales.

[0042] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0043] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0044] Currently, when a user touches a touch screen, they can use floating touch and ground touch. Compared to ground touch, the touch screen's mutual capacitance signal is more affected by floating touch, but the touch screen's self-capacitance signal is less affected by floating touch. Therefore, the self-capacitance signal can be used to compensate for the mutual capacitance signal to improve the touch effect. In addition, there may be water stains on the touch screen, and the waterproofing algorithm designed for water stain environments also requires the assistance of the self-capacitance signal. While the touch screen's mutual capacitance signal is distorted by water stains, the self-capacitance signal can be used to identify the mutual capacitance signal to determine whether the mutual capacitance signal at this location is caused by water stains or a real touch.

[0045] In a possible implementation, as shown in FIG1 , FIG1 is a processing flow chart of a touch chip provided in an embodiment of the present application. The processing flow includes a processing flow of a self-capacitive signal and a processing flow of a mutual-capacitive signal. Specifically, the processing flow of the touch chip may include S101 to S1010. S101, self-capacitive / mutual-capacitive timing switching. The self-capacitive / mutual-capacitive timing switching can complete the time-sharing operation of the self-capacitive signal path and the mutual-capacitive signal path. The processing flow of the self-capacitive signal may include S102 to S105, S102, the self-capacitive driving and receiving module realizes the self-capacitive driving signal transmission and the self-capacitive signal reception. S103, the self-capacitive data acquisition module realizes the sampling and filtering of the self-capacitive signal to obtain the self-capacitive data in digital form. S104, the self-capacitive data storage module stores the self-capacitive data in digital form. S105, the processor extracts the self-capacitive touch signal features from the frame-level self-capacitive image. In addition, the mutual capacitance signal processing flow may include S106 to S109. S106: The mutual capacitance drive and receiving module transmits the mutual capacitance drive signal and receives the mutual capacitance signal. S107: The mutual capacitance data acquisition module samples and filters the mutual capacitance signal to obtain digital mutual capacitance data. S108: The mutual capacitance data storage module stores the digital mutual capacitance data. S109: The processor extracts mutual capacitance touch signal features from the frame-level mutual capacitance image. S1010: The processor fuses the self-capacitance touch signal features with the mutual capacitance touch signal features to obtain a touch decision result.

[0046] As shown in FIG2 , FIG2 is a comparison diagram of a touch image signal provided by an embodiment of the present application. FIG2 (a) shows a schematic diagram of an uncompensated touch image signal in a hovering touch scenario, and FIG2 (b) shows a schematic diagram of a compensated touch image signal in a hovering touch scenario. Specifically, a lower grayscale indicates a stronger touch image signal, while a higher grayscale indicates a weaker touch image signal. FIG2 (a) shows that due to distortion of the touch image signal in the hovering touch scenario, the grayscale in the center area is significantly higher than the grayscale in the surrounding area, forming a basin-shaped concave pit. If not processed, it would be mistaken for multiple touch points around it, resulting in false touches. FIG2 (b) shows that after compensation of the touch image signal, compared to the touch image signal in FIG2 (a), the center area tends to be flatter, the concave pit phenomenon is reduced or even disappears, and the touch signal characteristics are close to those of a grounded touch scenario. Therefore, after compensating the touch image signal in the hovering touch scenario, the probability of false touches can be reduced.

[0047] To improve the mutual capacitance signal distortion problem in hover touch scenarios, a signal compensation technique is proposed. As shown in FIG3 , FIG3 is a flowchart of a signal compensation technique provided in an embodiment of the present application. The technique may include steps S301 to S305. Specifically, S301: Obtain a mutual capacitance signal. S302: Determine the mutual capacitance projection parameters for compensation. S303: Obtain a self-capacitance signal. S304: Determine the self-capacitance envelope for compensation. S305: Calculate the hover compensation coefficient to complete signal compensation. This is to fuse the mutual capacitance projection and the self-capacitance envelope.

[0048] In order to improve the problem of mutual capacitance signal distortion in water stain scenarios, another signal compensation technology is proposed, as shown in Figure 4. Figure 4 is a flow chart of another signal compensation technology provided by an embodiment of the present application. This technology realizes the identification of water stain scenarios and touch scenarios based on self-capacitance signals and mutual capacitance signals, which can avoid invalid touches triggered by water stains. Specifically, this technology distinguishes valid touches from invalid touches through self-capacitance signals based on the characteristic that the change in the touch signal caused by water stains is small due to the self-capacitance signal. Specifically, this technology may include S401 to S405. S401, obtain self-capacitance signals. S402, determine whether touch is detected. If touch is detected, execute S403; if no touch is detected, execute the end operation. S403, obtain mutual capacitance signals. S404, determine whether touch is detected. If touch is detected, execute S405; if no touch is detected, execute the end operation. S405, calculate touch coordinates based on mutual capacitance signals.

[0049] However, both of the above signal compensation technologies require scene recognition and signal compensation based on self-capacitance signals and mutual-capacitance signals, which are complex to implement and costly.

[0050] Therefore, an embodiment of the present application provides a touch chip, which includes: a mutual capacitance data acquisition circuit, a mutual capacitance data processing circuit, and a compensation circuit. In the touch chip provided by the embodiment of the present application, a mutual capacitance signal is acquired by the mutual capacitance data acquisition circuit, and the mutual capacitance signal is processed by the mutual capacitance data processing circuit to obtain a mutual capacitance image. Then, the touch mode is identified by the compensation circuit, and a compensation value is calculated based on the expected value of the mutual capacitance change corresponding to the touch mode and the mutual capacitance signal. The mutual capacitance image is compensated to obtain a compensated mutual capacitance image. The touch chip provided by the embodiment of the present application can be based solely on the mutual capacitance touch path, without relying on the self-capacitance touch path. Under the premise of compensating the mutual capacitance image to meet the touch requirements, the design cost and manufacturing cost of the touch chip can be reduced.

[0051] The aforementioned touch control chips can be applied to various systems or devices, such as terminal devices, such as mobile phones, tablets, laptops, augmented reality (AR), virtual reality (VR), and in-vehicle devices. The touch control chips can be applied to the touch screens of terminal devices to enable interaction between users and the terminal devices.

[0052] The touch control chip provided in the embodiments of the present application is further introduced below.

[0053] As shown in Figure 5, a schematic diagram of the structure of a touch control chip provided in an embodiment of the present application is shown. Touch control chip 50 may include a mutual capacitance data acquisition circuit 51, a mutual capacitance data processing circuit 52, and a compensation circuit 53. The touch control chip is used in suspended conductor touch control scenarios. The output of mutual capacitance data acquisition circuit 51 is coupled to the input of mutual capacitance data processing circuit 52, and the output of mutual capacitance data processing circuit 52 is coupled to the input of compensation circuit 53.

[0054] The mutual capacitance data acquisition circuit 51 is used to acquire a mutual capacitance signal when the suspended conductor contacts the touch screen.

[0055] For example, the touch screen can be a self-capacitive and mutual-capacitive capacitive screen, meaning that the touch screen can detect both self-capacitive and mutual-capacitive signals. The suspended conductor can be a user's finger, water stains, a stylus, or other conductive object, and can be configured based on actual needs. This embodiment of the present application does not impose any further limitations.

[0056] Exemplarily, the contact of a suspended conductor with the touch screen can be understood as a touch operation, wherein the touch operation can be a large-area touch operation or a multi-touch operation, or a small-area touch operation or a single-point touch operation. The embodiment of the present application does not limit the area and number of touch points of the touch operation.

[0057] Exemplarily, the mutual capacitance data acquisition circuit 51 may include a drive signal transmitting circuit and a mutual capacitance signal receiving circuit, wherein the drive signal transmitting circuit may sequentially send a drive signal to the horizontal electrodes of the touch screen, and at the same time, the mutual capacitance signal receiving circuit may receive the mutual capacitance signal transmitted by the vertical electrodes of the touch screen, and the mutual capacitance signal is the capacitance value of the touch screen after being touched relative to the change before being touched. Compared with the method shown in Figures 3 and 4, that is, a method of simultaneously acquiring self-capacitance signals and mutual capacitance signals, and compensating for mutual capacitance signals based on self-capacitance signals. The mutual capacitance data acquisition circuit 51 provided in the embodiment of the present application only receives mutual capacitance signals, which reduces the complexity of the touch chip 50, that is, reduces the design cost and manufacturing cost of the touch chip 50.

[0058] The mutual capacitance data processing circuit 52 is used to process the mutual capacitance signal to obtain a mutual capacitance image.

[0059] Exemplarily, the mutual capacitance data processing circuit 52 may process the mutual capacitance signal by sampling, filtering, and noise reduction. Specifically, the mutual capacitance signal obtained by the mutual capacitance data acquisition circuit 51 may be a continuous voltage signal y(t). The mutual capacitance data processing circuit 52 may convert y(t) into a sample value y(kT), where k is a positive integer, T is a sampling period, and y(kT) may be abbreviated as y[k]. Sampling is repeated every T seconds. The sampling period may be determined by the sampling frequency. The higher the sampling frequency, the closer the obtained signal is to the original signal.

[0060] In addition, the mutual capacitance data processing circuit 52 can use various types of filters (such as low-pass / high-pass filters, band-stop filters, and band-pass filters) to filter the mutual capacitance signal. In addition, the mutual capacitance data processing circuit 52 can also use an adaptive filter to filter the mutual capacitance signal. The adaptive filter is a filter designed based on the statistical characteristics of interference under a certain error criterion, where the error criterion can include minimum mean square error, least squares, and minimum variance.

[0061] In addition, the mutual capacitance data processing circuit 52 may use a moving average method, a wavelet threshold denoising method, or a median method to reduce the noise of the mutual capacitance signal.

[0062] Exemplarily, the mutual capacitance image is a mutual capacitance signal in digital form. After the mutual capacitance data processing circuit 52 samples, filters, and performs noise reduction on the mutual capacitance signal, it will also convert the mutual capacitance signal into a digital signal. Specifically, the mutual capacitance image may include the positions of multiple touch points and the grayscale of each touch point, wherein the positions of the multiple touch points are the positions where the suspended conductor contacts the touch screen. In one possible example, a two-dimensional coordinate system is established with any point on the touch screen as the origin. For example, one of the touch points can be represented as (x, y, γ), where x is the horizontal coordinate of the touch point, y is the vertical coordinate of the touch point, and γ is the grayscale of the touch point. For example, (12, 20, 25) indicates that the grayscale of the touch point with coordinates (12, 20) is 25. It can be understood that the mutual capacitance image may also include other information of the touch point, which is not limited here.

[0063] The compensation circuit 53 is used to calculate a compensation value based on the expected value of the mutual capacitance change corresponding to the touch mode and the received mutual capacitance signal under different touch modes of the suspended conductor, and compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0064] Exemplarily, the touch mode of the suspended conductor may include a water spot mode, a floating touch mode and a ground touch mode. Among them, the water spot mode means that there are water spots on the touch screen, and the water spots will affect the sensitivity of the touch screen, and false touches may occur. The floating touch mode is relative to the ground touch mode, wherein, when the user touches the touch screen, if the user touches the ground of the terminal device including the touch screen, the touch mode is the ground touch mode, and if the user does not touch the ground of the terminal device including the touch screen, the touch mode is the floating touch mode. In a possible example, assuming that the terminal device is a mobile phone, and the ground of the mobile phone is the mobile phone casing, if the user holds the mobile phone and touches it, the touch mode is the ground touch mode, and if the user places the mobile phone on the platform and touches it, the touch mode is the floating touch mode.

[0065] Each touch mode corresponds to a different degree of suspension, as shown in Figure 6, which is a schematic diagram of suspension levels for various scenarios provided by an embodiment of the present application. Figure 6 illustrates the suspension levels for scenarios such as ground touch, hover touch, and water stain. Specifically, the suspension level for the water stain mode is higher than that for the hover touch mode, and the suspension level for the hover touch mode is higher than that for the ground touch mode.

[0066] Optionally, the compensation circuit 53 is further configured to obtain a capacitance signal of the suspended conductor relative to ground based on the mutual capacitance signal, the first capacitance signal, and the second capacitance signal. The first capacitance signal includes capacitance data between the suspended conductor and the first electrode of the touch screen, and the second capacitance signal includes capacitance data between the suspended conductor and the second electrode of the touch screen.

[0067] Exemplarily, as shown in Figure 7, Figure 7 is a structural diagram of a capacitance model of a suspended conductor provided in an embodiment of the present application. Wherein, the touch screen may include a first electrode and a second electrode, the first electrode may be a horizontal electrode (represented by Rx in Figure 7), and the second electrode may be a longitudinal electrode (represented by Tx in Figure 7). There may be a first equivalent capacitance (represented by Crx in Figure 7) between the suspended conductor and the first electrode, and the capacitance data of the first equivalent capacitance is a first capacitance signal. There may be a second equivalent capacitance (represented by Ctx in Figure 7) between the suspended conductor and the second electrode, and the capacitance data of the second equivalent capacitance is a second capacitance signal. In addition, there is a third equivalent capacitance (represented by Cground in Figure 7) between the suspended conductor and the ground, and the capacitance data of the third equivalent capacitance is a capacitance signal to ground.

[0068] For example, when the suspended conductor is fully grounded, the capacitance signal of the suspended conductor to ground is infinite. At this time, the mutual capacitance signal when the suspended conductor contacts the touch screen can be obtained, and the first capacitance signal and the second capacitance signal can be calculated based on the mutual capacitance signal. Thus, in different touch modes, the capacitance signal of the suspended conductor to ground can be calculated based on the mutual capacitance signal, the first capacitance signal, and the second capacitance signal.

[0069] It can be understood that different values ​​of the ground capacitance signal correspond to different degrees of suspension. Specifically, the smaller the value of the ground capacitance signal, the greater the corresponding suspension degree, and the larger the value of the ground capacitance signal, the smaller the corresponding suspension degree.

[0070] Optionally, when the ground capacitance signal of the suspended conductor is less than a first threshold, the touch mode of the suspended conductor is a water spot mode. The compensation circuit 53 is specifically configured to obtain a compensation value based on the expected mutual capacitance variation corresponding to the water spot mode and the mutual capacitance signal, and to compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0071] Exemplarily, the first threshold value may be related to the degree of suspension corresponding to the water spot mode. Specifically, the first threshold value may be the inverse of the degree of suspension corresponding to the water spot mode. If the capacitance signal of the suspended conductor to the ground is less than the first threshold value, it indicates that the degree of suspension of the suspended conductor is large at this time, and the touch mode of the suspended conductor may be the water spot mode.

[0072] For example, if the touch mode of the suspended conductor is the water spot mode, the expected mutual capacitance change corresponding to the water spot mode can be recorded as target_1, the mutual capacitance signal can be recorded as capacitance_1, and the compensation value can be recorded as compensation_1. In one possible embodiment, the expected mutual capacitance change corresponding to the water spot mode, the mutual capacitance signal, and the compensation value can satisfy the following relationship: compensation_1 = target_1 - capacitance_1, that is, the compensation value is the difference between the expected mutual capacitance change corresponding to the water spot mode and the mutual capacitance signal.

[0073] In another possible implementation, the expected value of the mutual capacitance change corresponding to the water spot mode, the mutual capacitance signal, and the compensation value can satisfy the following relationship: compensation_1 = (target_1-capacitance_1)*a1, where a1 is the first compensation coefficient. Specifically, as can be seen from the capacitance model in Figure 7, the first equivalent capacitance, the second equivalent capacitance, and the third equivalent capacitance form a star connection. The calculation process of the first compensation coefficient may include: performing a star-delta (Y-Δ) transformation on the first equivalent capacitance, the second equivalent capacitance, and the third equivalent capacitance corresponding to the water spot mode, and calculating the first compensation coefficient based on the transformed capacitance model.

[0074] In another possible implementation, the expected value of the mutual capacitance change corresponding to the water stain pattern, the mutual capacitance signal, and the compensation value may satisfy the following relationship: compensation_1 = f(target_1, capacity_1), where f(target_1, capacity_1) represents a transformation function regarding target_1 and capacity_1.

[0075] It is understandable that the embodiments of the present application do not limit the specific implementation method of calculating the compensation value, and the compensation value can also be calculated in other ways.

[0076] Optionally, when the ground capacitance signal of the suspended conductor is greater than or equal to a first threshold and less than a second threshold, the touch mode of the suspended conductor is a suspended touch mode. The compensation circuit 53 is specifically configured to: obtain a compensation value based on the expected value of the mutual capacitance change corresponding to the suspended touch mode and the mutual capacitance signal; and compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0077] Exemplarily, the second threshold value may be related to the degree of suspension corresponding to the suspension touch mode. Specifically, the second threshold value may be the inverse of the degree of suspension corresponding to the suspension touch mode. If the capacitance signal of the suspension conductor to the ground is greater than or equal to the first threshold value and less than the second threshold value, it indicates that the degree of suspension of the suspension conductor at this time is smaller than that of the water stain mode, and the touch mode of the suspension conductor may be the suspension touch mode.

[0078] Exemplarily, if the touch mode of the suspended conductor is the floating touch mode, the expected value of the mutual capacitance change corresponding to the floating touch mode can be recorded as target_2, the mutual capacitance signal can be recorded as capacitance_2, and the compensation value can be recorded as compensation_2. In one possible embodiment, the expected value of the mutual capacitance change corresponding to the floating touch mode, the mutual capacitance signal, and the compensation value can satisfy the following relationship: compensation_2 = target_2-capacitance_2, that is, the compensation value is the difference between the expected value of the mutual capacitance change corresponding to the floating touch mode and the mutual capacitance signal. In another possible embodiment, the expected value of the mutual capacitance change corresponding to the floating touch mode, the mutual capacitance signal, and the compensation value can satisfy the following relationship: compensation_2 = (target_2-capacitance_2)*a2, where a2 is the second compensation coefficient. The second compensation coefficient can be calculated based on the first equivalent capacitance, the second equivalent capacitance, and the third equivalent capacitance in the floating touch mode. In another possible implementation, the expected value of the mutual capacitance change corresponding to the floating touch mode, the mutual capacitance signal, and the compensation value may satisfy the following relationship: compensation_2 = f(target_2, capacitance_2), where f(target_2, capacitance_2) represents a transformation function of target_2 and capacitance_2.

[0079] Optionally, when the ground capacitance signal of the suspended conductor is greater than or equal to a second threshold, the touch mode of the suspended conductor is a ground touch mode. The compensation circuit 53 is specifically configured to: obtain a compensation value based on the expected value of the mutual capacitance change corresponding to the ground touch mode and the mutual capacitance data; and compensate the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0080] For example, if the ground capacitance signal of the suspended conductor is greater than or equal to the second threshold, it indicates that the suspension degree of the suspended conductor is smaller than that of the suspended touch mode, and the touch mode of the suspended conductor may be the ground touch mode.

[0081] For example, if the touch mode of the suspended conductor is the ground touch mode, the expected value of the mutual capacitance change corresponding to the ground touch mode can be recorded as target_3, the mutual capacitance signal can be recorded as capacitance_3, and the compensation value can be recorded as compensation_3. In one possible embodiment, the expected value of the mutual capacitance change corresponding to the ground touch mode, the mutual capacitance signal, and the compensation value can satisfy the following relationship: compensation_3 = target_3 - capacitance_3, that is, the compensation value is the difference between the expected value of the mutual capacitance change corresponding to the ground touch mode and the mutual capacitance signal. In another possible embodiment, the expected value of the mutual capacitance change corresponding to the ground touch mode, the mutual capacitance signal, and the compensation value can satisfy the following relationship: compensation_3 = (target_3 - capacitance_2) * a3, where a3 is the third compensation coefficient. The third compensation coefficient can be calculated based on the first equivalent capacitance, the second equivalent capacitance, and the third equivalent capacitance in the ground touch mode. In another possible implementation, the expected mutual capacitance change value, mutual capacitance signal, and compensation value corresponding to the ground touch mode can satisfy the following relationship: compensation_3 = f(target_3, capacitance_3), where f(target_3, capacitance_2) represents a transformation function with respect to target_2 and capacitance_2. In another possible implementation, the value of compensation_3 can be 0, meaning that no mutual capacitance image compensation is performed when the suspended conductor uses the ground touch mode.

[0082] Optionally, as shown in Figure 8, which is a schematic structural diagram of another touch chip provided in an embodiment of the present application, the touch chip 50 may further include a mutual capacitance data storage circuit 54, which is used to store mutual capacitance images.

[0083] Exemplarily, the input end of the mutual capacitance data storage circuit 54 is coupled to the output end of the mutual capacitance data processing circuit 52, and the output end of the mutual capacitance data storage circuit 54 is coupled to the input end of the compensation circuit. The mutual capacitance data processing circuit 52 converts the mutual capacitance signal into a digital mutual capacitance image and stores it in the mutual capacitance data storage circuit 54. The compensation circuit 53 can read the mutual capacitance image from the mutual capacitance data storage circuit 54 and compensate the mutual capacitance image. The compensated mutual capacitance image can still be stored in the mutual capacitance data storage circuit 54.

[0084] Exemplarily, the mutual capacitance data storage circuit 54 may be a high bandwidth memory (HBM), or a synchronous dynamic random access memory (SDRAM).

[0085] Applied to the above-mentioned touch chip, the touch processing method provided by the embodiment of the present application is further introduced below.

[0086] As shown in FIG9 , FIG9 is a flow chart of a touch processing method provided by an embodiment of the present application. The method includes S901 to S903 .

[0087] S901: The mutual capacitance data acquisition circuit acquires a mutual capacitance signal when the suspended conductor contacts the touch screen.

[0088] For example, the suspended conductor can be a user's finger, water stains, or other conductive objects such as a stylus. Touch modes for the suspended conductor contacting the touch screen can include a water stain mode, a suspended touch mode, and a ground touch mode. For the specific implementation of S901, refer to the above description of the mutual capacitance data acquisition circuit.

[0089] S902 : The mutual capacitance data processing circuit processes the mutual capacitance signal to obtain a mutual capacitance image.

[0090] For example, the mutual capacitance data processing circuit can perform sampling, filtering, and noise reduction on the mutual capacitance signal to obtain a mutual capacitance image. Specific implementations of S902 can refer to the above description of the mutual capacitance data processing circuit.

[0091] S903 . In different touch modes of the suspended conductor, the compensation circuit calculates a compensation value based on the expected value of the mutual capacitance change corresponding to the touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0092] For example, the compensation circuit can identify the touch mode and calculate the compensation value based on the expected mutual capacitance change corresponding to the touch mode and the mutual capacitance signal. Therefore, the touch processing method provided in the embodiment of the application only obtains the mutual capacitance signal and does not rely on the self-capacitance signal. While compensating the mutual capacitance image to meet touch requirements, it can reduce the design and manufacturing costs of the touch chip.

[0093] Optionally, the method also includes: the compensation circuit obtains a capacitance signal of the suspended conductor to the ground based on the mutual capacitance signal, the first capacitance signal and the second capacitance signal, the first capacitance signal includes capacitance data between the suspended conductor and the first electrode of the touch screen, and the second capacitance signal includes capacitance data between the suspended conductor and the second electrode of the touch screen.

[0094] Optionally, when the ground capacitance signal of the suspended conductor is less than a first threshold, the touch mode of the suspended conductor is a water spot mode. S903 may include: the compensation circuit calculating a compensation value based on an expected value of the mutual capacitance change corresponding to the water spot mode and the received mutual capacitance signal, and compensating the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0095] Optionally, when the ground capacitance signal of the suspended conductor is greater than or equal to a first threshold and less than a second threshold, the touch mode of the suspended conductor is a suspended touch mode. S903 may include: the compensation circuit calculating a compensation value based on an expected value of the mutual capacitance change corresponding to the suspended touch mode and the received mutual capacitance signal, and compensating the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0096] Optionally, when the ground capacitance signal of the suspended conductor is greater than or equal to a second threshold, the touch mode of the suspended conductor is a ground touch mode. S903 may include: the compensation circuit calculating a compensation value based on an expected value of the mutual capacitance change corresponding to the ground touch mode and the received mutual capacitance signal, and compensating the mutual capacitance image based on the compensation value to obtain a compensated mutual capacitance image.

[0097] Optionally, the touch control chip further includes a mutual capacitance data storage circuit. The method further includes: the mutual capacitance data storage circuit storing the mutual capacitance image.

[0098] An embodiment of the present application further provides a touch display device, which includes a touch chip and a touch screen, and the touch chip and the touch screen are electrically connected.

[0099] An embodiment of the present application further provides an electronic device, which includes a processor and a memory, wherein the memory and the processor are coupled, the memory is used to store computer instructions, and the processor is used to execute the computer instructions to implement the touch processing method described above.

[0100] An embodiment of the present application further provides a computer storage medium storing computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned related method steps to implement the touch processing method in the above-mentioned embodiment.

[0101] An embodiment of the present application further provides a computer program product. When the computer program product is run on a computer, the computer is caused to execute the above-mentioned related steps to implement the touch processing method executed by the electronic device in the above-mentioned embodiment.

[0102] In addition, an embodiment of the present application also provides a device, which can specifically be a chip, component or module, and the device may include a connected processor and memory; wherein the memory is used to store computer execution instructions, and when the device is running, the processor can execute the computer execution instructions stored in the memory to enable the chip to execute the touch processing method performed by the electronic device in the above-mentioned method embodiments.

[0103] Among them, the touch chip, touch display device, electronic device, computer storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0104] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0105] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0106] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0108] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0109] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A touch chip, characterized in that: The touch chip is applied to the suspended conductor touch scene, and the touch chip includes: a mutual capacitance data acquisition circuit, a mutual capacitance data processing circuit and a compensation circuit; The mutual capacitance data acquisition circuit is used to: acquire a mutual capacitance signal when the suspended conductor contacts the touch screen; The mutual capacitance data processing circuit is used to: process the mutual capacitance signal to obtain a mutual capacitance image; The compensation circuit is configured to calculate a compensation value based on an expected value of a mutual capacitance variation corresponding to the touch mode and the received mutual capacitance signal under different touch modes of the suspended conductor, and compensate the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image.

2. The touch control chip according to claim 1, wherein: The compensation circuit is further configured to: A capacitance signal of the suspended conductor to ground is obtained based on the mutual capacitance signal, the first capacitance signal, and the second capacitance signal, where the first capacitance signal includes capacitance data between the suspended conductor and the first electrode of the touch screen, and the second capacitance signal includes capacitance data between the suspended conductor and the second electrode of the touch screen.

3. The touch control chip according to claim 2, wherein: When the ground capacitance signal of the suspension conductor is less than a first threshold, the touch mode of the suspension conductor is a water spot mode; The compensation circuit is specifically used for: The compensation value is calculated based on the expected value of the mutual capacitance variation corresponding to the water spot pattern and the received mutual capacitance signal, and the mutual capacitance image is compensated based on the compensation value to obtain the compensated mutual capacitance image.

4. The touch control chip according to claim 2, wherein: When the ground capacitance signal of the suspension conductor is greater than or equal to a first threshold and less than a second threshold, the touch mode of the suspension conductor is a suspension touch mode; The compensation circuit is specifically used for: The compensation value is calculated based on the expected value of the mutual capacitance variation corresponding to the floating touch mode and the received mutual capacitance signal, and the mutual capacitance image is compensated based on the compensation value to obtain the compensated mutual capacitance image.

5. The touch control chip according to claim 2, wherein: When the ground capacitance signal of the suspension conductor is greater than or equal to a second threshold, the touch mode of the suspension conductor is a ground touch mode; The compensation circuit is specifically used for: The compensation value is calculated based on the expected value of the mutual capacitance variation corresponding to the ground touch mode and the received mutual capacitance signal, and the mutual capacitance image is compensated based on the compensation value to obtain the compensated mutual capacitance image.

6. The touch control chip according to any one of claims 1 to 5, characterized in that: The touch control chip also includes a mutual capacitance data storage circuit; The mutual capacitance data storage circuit is used to store the mutual capacitance image.

7. A touch processing method, characterized in that: The method is applied to a touch chip, which includes: a mutual capacitance data acquisition circuit, a mutual capacitance data processing circuit, and a compensation circuit. The method includes: The mutual capacitance data acquisition circuit acquires a mutual capacitance signal when the suspended conductor contacts the touch screen; The mutual capacitance data processing circuit processes the mutual capacitance signal to obtain a mutual capacitance image; In different touch modes of the suspended conductor, the compensation circuit calculates a compensation value based on an expected value of the mutual capacitance change corresponding to the touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image.

8. The method according to claim 7, characterized in that The method further comprises: The compensation circuit obtains a capacitance signal of the suspended conductor to ground based on the mutual capacitance signal, a first capacitance signal, and a second capacitance signal, wherein the first capacitance signal includes capacitance data between the suspended conductor and a first electrode of the touch screen, and the second capacitance signal includes capacitance data between the suspended conductor and a second electrode of the touch screen.

9. The method according to claim 8, characterized in that When the ground capacitance signal of the suspended conductor is less than a first threshold, the touch mode of the suspended conductor is a water spot mode; the compensation circuit calculates a compensation value based on an expected value of the mutual capacitance change corresponding to the touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image, including: The compensation circuit calculates a compensation value based on the expected value of the mutual capacitance variation corresponding to the water spot pattern and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image.

10. The method according to claim 9, characterized in that When the ground capacitance signal of the suspended conductor is greater than or equal to a first threshold and less than a second threshold, the touch mode of the suspended conductor is a suspended touch mode; the compensation circuit calculates a compensation value based on an expected value of a mutual capacitance variation corresponding to the touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image, including: The compensation circuit calculates the compensation value based on the expected value of the mutual capacitance variation corresponding to the floating touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image.

11. The method according to claim 9, characterized in that When the ground capacitance signal of the suspended conductor is greater than or equal to a second threshold, the touch mode of the suspended conductor is a ground touch mode; the compensation circuit calculates a compensation value based on an expected value of a mutual capacitance variation corresponding to the touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image, including: The compensation circuit calculates the compensation value based on the expected value of the mutual capacitance variation corresponding to the ground touch mode and the received mutual capacitance signal, and compensates the mutual capacitance image based on the compensation value to obtain the compensated mutual capacitance image.

12. The method according to any one of claims 7 to 11, characterized in that: The touch control chip further includes a mutual capacitance data storage circuit, and the method further includes: The mutual capacitance data storage circuit stores the mutual capacitance image.

13. A touch display device, characterized in that: The touch control chip and the touch screen according to any one of claims 1 to 6 are electrically connected.

14. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory is coupled to the processor, the memory is used to store computer instructions, and the processor is used to execute the computer instructions to implement the method according to any one of claims 7 to 12.

15. A computer-readable storage medium, characterized in that The method comprises computer instructions, which, when executed on an electronic device, cause the electronic device to execute the method according to any one of claims 7 to 12.

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