Touch-control and display driving chip, noise processing method, and touch-control display apparatus

Abstract

Disclosed are a touch-control and display driving chip, a noise compensation method, and a touch-control display apparatus. The touch-control and display driving chip comprises: a noise comparison circuit (101) and a touch controller (102), wherein the noise comparison circuit (101) is electrically connected to the touch controller (102). The noise comparison circuit (101) is configured to: compare information of the current image frame with image information of a next image frame, so as to obtain a noise comparison result, and send an instruction signal to the touch controller (102) on the basis of the noise comparison result. The touch controller (102) is configured to: perform, in response to the instruction signal, touch-control noise preprocessing on the next image frame before the next image frame is displayed.

Description

Touch and display driver chip, noise processing method and touch display device CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202410190434.6, filed on February 20, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure belongs to the field of display technology and relates to a touch and display driver chip, a noise processing method, and a touch display device. Background Art

[0003] With the continuous advancement of display technology, touch display devices have gained widespread application. Typically, the touch panel and display panel in a touch display device are independently controlled by two separate chips. To improve the integration of touch display devices, TDDI (Touch and Display Driver Integration) chips have emerged. Targeted improvements to touch display device pain points, such as false and random touch detection, have become a key development direction for TDDI chips. Summary of the Invention

[0004] In a first aspect of the present disclosure, a touch and display driver chip is provided for use in a touch display panel. The touch and display driver chip includes a noise contrast circuit and a touch controller, wherein the noise contrast circuit is electrically connected to the touch controller. The noise contrast circuit is configured to compare image information of a current frame image with image information of a next frame image to obtain a noise contrast result, and send an indication signal to the touch controller based on the noise contrast result, wherein the noise contrast result is used to characterize the change in display noise from the current frame image to the next frame image. The touch controller is configured to perform touch noise preprocessing on the next frame image before displaying the next frame image in response to the indication signal.

[0005] In combination with the first aspect of the present disclosure, in some embodiments, the noise contrast circuit is configured to: send a first indication signal to the touch controller if the noise contrast result is a first type of comparison result; and the touch controller is configured to: perform noise pre-compensation on the touch basic data corresponding to the next frame image before displaying the next frame image in response to the first indication signal.

[0006] In conjunction with the first aspect of the present disclosure, in some embodiments, the touch and display driver chip further includes a drive electrode controller electrically connected to the touch controller, wherein the noise comparison circuit is configured to send a second indication signal to the touch controller if the noise comparison result is a second type of comparison result. The touch controller is configured to adjust target drive parameters of the drive electrode controller in response to the second indication signal before displaying the next frame of image, wherein the target drive parameters include one or more of a touch drive frequency, a touch scan time, and a touch drive voltage.

[0007] In conjunction with the first aspect of the present disclosure, in some embodiments, the second type of comparison result includes: a first sub-result and a second sub-result, and the second indication signal includes: a first sub-signal and a second sub-signal. The noise comparison circuit is configured to: if the noise comparison result is the first sub-result, send the first sub-signal to the touch controller; and if the noise comparison result is the second sub-result, send the second sub-signal to the touch controller. The touch controller is configured to: in response to the first sub-signal, control the drive electrode controller to adjust the target drive parameter from the default value to the target value before displaying the next frame of image; and in response to the second sub-signal, control the drive electrode controller to restore the target drive parameter to the default value before displaying the next frame of image.

[0008] In combination with the first aspect of the present disclosure, in some embodiments, the target value includes: a pre-configured first preset value, a second preset value, and a third preset value; the touch controller is configured to: in response to the first sub-signal, before displaying the next frame image, control the drive electrode controller to adjust the touch drive frequency to the first preset value, increase the touch scan time to the second preset value, and increase the touch drive voltage to the third preset value.

[0009] In combination with the first aspect of the present disclosure, in some embodiments, the target drive parameter includes a touch drive frequency, and the touch controller is configured to: in response to the first sub-signal, read the image information of the next frame image transmitted by the noise contrast circuit, and determine the target value of the touch drive frequency based on the image information of the next frame image; so as to control the drive electrode controller to adjust the touch drive frequency to the target value before displaying the next frame image.

[0010] In combination with the first aspect of the present disclosure, in some embodiments, the noise contrast circuit is configured to: perform bypass processing if the noise contrast result is a third type of contrast result.

[0011] In conjunction with the first aspect of the present disclosure, in some embodiments, the noise contrast circuit is further configured to: if the noise contrast result is a fourth type of contrast result, send a third indication signal to the touch controller. The touch controller is further configured to: in response to the third indication signal, stop noise compensation for the basic touch data of the next frame of image.

[0012] In combination with the first aspect of the present disclosure, in some embodiments, the image information includes: source drive data, and the noise contrast circuit is configured to: calculate the difference in source drive data of the same pixel row between the current frame image and the next frame image, and obtain the noise contrast result based on the difference in each pixel row.

[0013] In combination with the first aspect of the present disclosure, in some embodiments, the noise contrast circuit is configured to: count the cumulative sum of the differences of the pixel rows with positive differences in each pixel row to obtain a first reference value, and count the cumulative sum of the differences of the pixel rows with negative differences in each pixel row to obtain a second reference value; count the number of positive and negative difference flips of adjacent pixel rows; and determine the noise contrast result based on the first reference value, the second reference value and the number of positive and negative difference flips.

[0014] In combination with the first aspect of the present disclosure, in some embodiments, the touch controller is configured to: in response to the first indication signal, read the image information of the next frame image transmitted by the noise contrast circuit, determine noise compensation data based on the image information of the next frame image, and perform noise compensation on the touch basic data obtained when displaying the next frame image based on the noise compensation data.

[0015] In combination with the first aspect of the present disclosure, in some embodiments, the touch controller is configured to: determine the noise compensation type based on the image information of the next frame image, and determine the noise compensation data corresponding to the noise compensation type based on the correspondence between the pre-stored noise compensation data and the noise compensation type.

[0016] In conjunction with the first aspect of the present disclosure, in some embodiments, the touch and display driver chip further includes: a data transmission interface configured to receive an image to be displayed; a random access memory electrically connected to the data transmission interface and configured to store the image to be displayed; and a digital processor electrically connected to the random access memory and configured to read the image to be displayed from the random access memory and pre-process the image to be displayed. The noise contrast circuit is electrically connected to the digital processor, or the noise contrast circuit is electrically connected to the digital processor and the random access memory, or the noise contrast circuit is electrically connected to the data transmission interface and the digital processor.

[0017] In combination with the first aspect of the present disclosure, in some embodiments, the noise contrast circuit and the digital processor are independently provided, or the noise contrast circuit is a logic circuit integrated with the digital processor.

[0018] In combination with the first aspect of the present disclosure, in some embodiments, the touch controller includes a micro control unit.

[0019] In a second aspect of the present disclosure, a touch display device is provided, comprising: a touch display panel and the touch and display driver chip provided in the first aspect of the present disclosure, wherein the touch and display driver chip is electrically connected to the touch display panel.

[0020] In a third aspect of the present disclosure, a touch noise processing method is provided, comprising: comparing image information of a current frame image with image information of a next frame image to obtain a noise comparison result, wherein the noise comparison result is used to characterize a change in display noise when switching from the current frame image to the next frame image; and performing touch noise preprocessing on the next frame image before displaying the next frame image based on the noise comparison result.

[0021] In a fourth aspect of the present disclosure, a touch display device is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the touch noise processing method described in the third aspect of the present disclosure are implemented.

[0022] The above description is only an overview of the technical solutions provided by some embodiments of the present disclosure. In order to more clearly understand the technical means of the embodiments of the present disclosure, they can be implemented in accordance with the contents of the specification. In order to make the embodiments of the present disclosure more obvious and easy to understand, the specific implementation methods of the embodiments of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0024] FIG1 shows a schematic structural diagram of an exemplary touch display panel;

[0025] FIG2 shows a schematic structural diagram of a touch and display driver chip according to some embodiments of the present disclosure;

[0026] FIG3 shows a schematic diagram of an exemplary partially bright screen image;

[0027] FIG4 shows schematic diagrams of some exemplary reload screens;

[0028] FIG5 shows a flowchart of image noise comparison according to some embodiments of the present disclosure;

[0029] FIG6 shows a schematic structural diagram of a touch display device according to some embodiments of the present disclosure; and

[0030] FIG7 shows a flowchart of a touch noise compensation method according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0031] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] It should be noted that the term "plurality" used herein includes two or more than two. "At least one" includes one or more than one. "Include" or "comprising" and similar expressions mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, without excluding other elements or objects. It should be understood that when element A and element B are "electrically connected" as described herein, element A and element B may be directly electrically connected, or there may be an intermediate element between element A and element B.

[0033] The Diff value, or touch signal, described in this article, reflects the magnitude of touch sensing. When a touch panel is not being touched, the capacitance on the front surface is uniformly distributed, with a uniformity within 15%. After processing by the IC, this is the detected touch data (Rawdata). To optimize data calculations, a reference value is typically subtracted from the Rawdata value; the resulting difference is the Diff value (usually fluctuating around 0). When a user performs a touch operation, a relatively large Diff value is detected at the touch point. By comparing the detected Diff value with a preset threshold, it is determined whether the Diff value is caused by the user's touch operation or interference, such as display interference, electromagnetic interference, static electricity, air humidity, temperature, or water droplets. If the Diff value exceeds the threshold, it is considered a user touch operation and a touch is reported; otherwise, it is interference. The screen touch sensing caused by interference can be characterized as noise; the greater the interference, the greater the noise. Display interference refers to the interference caused by the display panel displaying images on touch detection. The display noise mentioned in this article refers to the screen touch sensing amount caused by display interference.

[0034] When debugging the touch panel (TP) of a touch display product, the inventors of this application discovered that when the display brightness of the touch display product is increased or the display screen is switched to a high-noise screen, the detected Rawdata value will fluctuate significantly due to changes in the screen display noise. In severe cases, the Diff value will be close to the reporting threshold when no touch behavior occurs, causing false reporting of points and random reporting of points and other adverse touch phenomena, affecting the user's touch experience.

[0035] For the same frame of display, the basic touch data (Rawdata) detected under high brightness and low brightness conditions varies greatly. For example, when the screen displays a mainly white screen such as a login interface, the screen is adjusted to the lowest brightness, and the detected Diff value is roughly distributed in the range of -40 to 60. When the screen is adjusted to the highest brightness, the maximum detected Diff value is about 500. The baseline Rawdata value is usually about 10,000 and will be uniformly eliminated during the calculation process. The Diff value generated by the user's touch operation is about 3,000, and the reporting threshold is (3,000*15%) to (3,000*25%), that is, 450 to 750. This shows that the Diff value generated by the change in display panel brightness is already close to the reporting threshold, which is prone to false reporting and other poor touch phenomena such as random reporting.

[0036] In order to improve the poor touch phenomenon that exists when the display screen switches to a high-noise screen or a high-brightness screen, the inventors of this application have made many attempts. For example, they have tried to increase the reporting threshold, but this will sacrifice touch sensitivity. For example, they have also tried to detect changes in the reference Rawdata value through the Microcontroller Unit (MCU) in the touch driver chip when increasing the display brightness of the display panel, and perform unified algorithm compensation. However, the algorithm compensation will have a delay and cannot compensate for the first few frames of the high-brightness state. These frames are also prone to poor touch phenomena such as false reporting and random reporting.

[0037] In view of this, some embodiments of the present disclosure provide a touch and display driver chip, a noise processing method and a touch display device, which can compare the image information of the current frame image and the next frame image before the display screen is switched. When the display noise change of the next frame image compared with the current frame image is likely to cause false alarm points, random alarm points and other adverse touch phenomena, touch noise processing is performed on the next frame image in a timely manner, which is beneficial to reducing the interference of noise on the touch detection results without affecting the touch sensitivity, thereby reducing false alarm points, random alarm points and other adverse touch phenomena.

[0038] The following is a further detailed description of the touch and display driver chip, noise processing method, and display device provided in some embodiments of the present disclosure, in conjunction with the accompanying drawings. It should be noted that the touch and display driver chip and noise processing method provided in some embodiments of the present disclosure can be applied to both mutual-capacitive touch display panels and self-capacitive touch display panels.

[0039] Some embodiments of the present disclosure provide a touch and display driver chip, which is applied to a touch display panel to perform display control and touch detection on the touch display panel. A touch display panel is a panel with touch and display functions. Figure 1 shows a schematic structural diagram of an exemplary touch display panel. As shown in Figure 1, the touch display panel 10 may include: a display panel 11 and a touch structure 12, and the touch structure 12 is arranged on the display side of the display panel 11. The touch structure 12 may, for example, adopt a single-piece touch panel (One Glass Solution, abbreviated as OGS), or adopt an embedded touch structure such as On-cell or In-cell. Figure 1 illustrates an embedded touch structure as an example. Since the distance between the touch structure 12 and the display panel 11 is small, the touch structure 12 is easily interfered with by the display panel 11.

[0040] In some embodiments, the touch display panel may be a self-luminous display panel or a liquid crystal display (LCD) panel. The self-luminous display panel may be, for example, an organic light emitting diode (OLED) display panel or a quantum dot light emitting diode (QLED) display panel.

[0041] Figure 2 shows a schematic structural diagram of a touch and display driver chip according to some embodiments of the present disclosure. As shown in Figure 2, the touch and display driver chip 100 may include: a noise contrast circuit 101 and a touch controller 102, and the noise contrast circuit 101 is electrically connected to the touch controller 102. The noise contrast circuit 101 is configured to: compare the image information of the current frame image with the image information of the next frame image, obtain a noise contrast result, and send an indication signal to the touch controller 102 based on the noise contrast result. Among them, the current frame image is the image currently being displayed, and the next frame image is the image to be displayed in the next frame. The noise contrast result is used to characterize the change in display noise when switching from the current frame image to the next frame image. The touch controller 102 is configured to: in response to the indication signal, perform touch noise preprocessing on the next frame image before displaying the next frame image.

[0042] By adding a noise comparison circuit 101 to the touch and display driver chip 100, a noise comparison result between the current frame image and the next frame image is obtained, and an indication signal is sent to the touch controller 102 based on the noise comparison result, so that the touch controller 102 can promptly perform touch noise preprocessing on the next frame image when there is a risk of the noise comparison result causing adverse touch phenomena such as false alarm points and random alarm points. This is beneficial for reducing the interference of noise on the touch detection results when the display screen is switched (such as switching from a low-brightness screen to a high-brightness screen or from a low-noise screen to a high-noise screen), thereby reducing adverse touch phenomena such as false alarm points and random alarm points.

[0043] In some embodiments, reference image samples can be collected during the TP debugging phase. For example, if it is found that the TP is prone to false or random touch detection when switching to certain display images, these display images can be used as reference image samples. In some embodiments, reference image samples can include, but are not limited to, high-noise images and high-brightness images.

[0044] For example, when displaying a high-brightness picture, although the display noise generated is relatively uniform, the noise value will rise as a whole compared to the low-brightness picture, causing the acquired touch basic data, namely the Rawdata value, to rise as a whole, causing the Diff value to be close to the reporting threshold, resulting in a false alarm point. Taking the OLED touch display panel as an example, the main reason for the rise in the Rawdata value is that the distance between the touch sensing electrode and the cathode (ELVSS) of the OLED touch display panel is close (about 10μm), and the capacitance between the two is large (about 400pF). When the display screen changes from low brightness to high brightness, the impedance on its ELVSS becomes larger, causing the capacitance between the touch sensing electrodes to change, thereby affecting the change in the Rawdata value. In addition, the higher the resolution of the OLED touch display panel, the more serious the rise in the Rawdata value of TP will be when the picture changes from low brightness to high brightness.

[0045] For another example, when a partially bright screen image is displayed, the display noise generated is uneven. The display noise in the dark screen area is relatively low, and the display noise in the bright screen area is relatively high, which makes it easy for false alarms to occur. A partially bright screen refers to a portion of the display area of ​​the screen being in a bright state, which is a bright screen area, and a portion of the display area being in a dark state, which is a dark screen area. That is to say, compared to the previous frame, the display brightness of the bright screen area has increased, and the display brightness of the dark screen area has remained unchanged or decreased. Figure 3 shows a schematic diagram of an exemplary partially bright screen image. As shown in Figure 3, the first area 301 filled with oblique lines is a dark screen area, and the second area 302 is a bright screen area.

[0046] For another example, when a high-noise screen such as an overloaded screen is displayed, the display noise generated by the entire screen is ups and downs, and the uniformity is poor. False alarms are prone to occur at touch points with higher display noise. It should be noted that an overloaded screen refers to a screen with a relatively large grayscale step amplitude in adjacent pixel areas, resulting in a larger display noise. Figure 4 shows a schematic diagram of some exemplary overloaded screens. As shown in Figure 4, the overloaded screen can, for example, include a screen with one row of white and one row of black alternating (1 White 1 Black, abbreviated as 1W1B), a screen with two rows of white and two rows of black alternating (2 White 2Black, abbreviated as 2W2B), a screen with five rows of white and five rows of black alternating (5 White 5 Black, abbreviated as 5W5B), and a screen with ten rows of white and ten rows of black alternating (10 White 10 Black, abbreviated as 10W10B), and so on.

[0047] A noise comparison strategy is set between the current frame image and the next frame image based on the collected reference image samples, and a noise comparison circuit 101 capable of implementing the noise comparison strategy is configured in the touch and display driver chip 100. This allows a pre-judgment of whether switching the display screen to the next frame image is likely to cause adverse touch phenomena such as false alarms and random alarms before the next frame image is displayed. The touch controller 102 is notified to perform corresponding actions based on the noise comparison result to reduce the impact of the display noise of the next frame image on the touch detection results, thereby being able to overcome the impact of the display noise in a timely manner when the display screen switches to the next frame image.

[0048] In some embodiments, the image information may include: source drive data (Source Data). It is understandable that the brighter the screen, the lower the voltage value of the source drive data, and the darker the screen, the higher the voltage value of the source drive data. Therefore, by comparing the voltage value of the overall source drive data, the noise change of the next frame image compared to the current frame image can be judged. The noise contrast circuit 101 is configured to: calculate the difference in source drive data of the same pixel row of the current frame image and the next frame image, and obtain a noise contrast result based on the difference of each pixel row. In some embodiments, the source drive data may include a data voltage value Vdata, and the difference in the source drive data may be a difference in the data voltage value.

[0049] In some embodiments, the source drive data, such as the data voltage value Vdata, of each pixel row can be calculated for the current frame image and the next frame image, and then the average value of the average value of the same pixel row can be subtracted to obtain the difference value of each pixel row. In other embodiments, the source drive data, such as the data voltage value Vdata, of the same pixel point in the same pixel row can be subtracted first, and then the average value of the difference of each pixel point in the same pixel row can be calculated to obtain the difference value of each pixel row. This difference value can reflect the noise change of the pixel row when the screen switches to a certain extent.

[0050] In some embodiments, after obtaining the difference of each pixel row, some reference factors can be obtained through these differences, and then the noise contrast result can be obtained according to the reference factors and the judgment conditions. For example, the reference factors may include but are not limited to one or more combinations of the following parameters: the cumulative sum of the absolute values ​​of the differences of each pixel row, the number of positive and negative difference flips of adjacent pixel rows, the number of positive difference rows (i.e., the number of pixel rows with positive differences), the number of negative difference rows (i.e., the number of pixel rows with negative differences), the cumulative sum of the differences of the positive difference rows, and the cumulative sum of the differences of the negative difference rows. The judgment conditions can be set according to the reference image samples collected in the actual application scenario and the reference factors adopted, and the present disclosure does not impose any restrictions on this.

[0051] FIG5 shows a flowchart of image noise comparison according to some embodiments of the present disclosure. As shown in FIG5 , in some embodiments, the noise comparison results between the current frame image and the next frame image can be divided into a first type of comparison result, a second type of comparison result, and a third type of comparison result. The first type of comparison result indicates that the next frame image is a medium noise (Middle Noise) picture change compared to the current frame image. The second type of comparison result indicates that the next frame image is a high noise (High Noise) picture change compared to the current frame image. The third type of comparison result indicates that the next frame image is a low noise (Low Noise) picture change compared to the current frame image, that is, the display noise of the two is basically the same.

[0052] Of course, in other implementations, the noise comparison results can also be divided into two categories. The first category indicates that the display noise has increased, and there is a risk of false alarms when switching between screens, requiring touch noise processing for the next frame. The second category indicates that the display noise is basically the same, and there is no risk of false alarms when switching between screens, so no touch noise processing is required. It should be noted that the category of noise comparison results can be determined according to the needs of the actual application scenario. This disclosure does not impose any restrictions on this.

[0053] In some embodiments, a medium-noise image change can be considered when the noise change amplitude of the next frame image is compared to the current frame image, the noise change trend shows a certain regularity, and the expected touch noise processing effect can be achieved through noise compensation. In some embodiments, the current frame image is a low-noise image and the next frame image is a medium-noise image, and the noise comparison result obtained is a first-category comparison result. At least part of the medium-noise image generates higher noise on the TP than the low-noise image.

[0054] For example, if the current frame image is low-brightness and the next frame image is high-brightness, the display noise of the next frame image will be generally increased compared to the current frame image. In this case, the noise comparison result is the first type of comparison result. For another example, if the current frame image is a fully bright screen image and the next frame image is a partially bright screen image, when switching to the next frame image, the display noise of one area increases, while the display noise of another area remains basically unchanged or decreases. In this case, the noise comparison result is the first type of comparison result.

[0055] In some embodiments, the noise comparison result is a first type of comparison result, indicating that the display noise of at least a portion of an area in the next frame image is higher than the display noise of the same area in the current frame image, and noise compensation can reduce the impact of this relatively high noise on the touch detection result.

[0056] In some embodiments, when the next frame image is compared with the current frame image, the noise change amplitude is at a higher level, the noise change trend is ups and downs, and it is difficult to achieve the expected touch noise processing effect through noise compensation alone. This can be considered a high-noise picture change. In some embodiments, one of the current frame image and the next frame image is a low-noise picture, and the other is a high-noise picture. The noise comparison result obtained is a second-type comparison result. The noise generated by the high-noise picture on the TP is higher than the noise generated by the medium-noise picture on the TP. For example, the current frame image is a light-load picture, and the next frame image is a heavy-load picture. The display noise generated by the light-load picture is low and has good uniformity, and is a low-noise picture. The display noise generated by the heavy-load picture is high and has poor uniformity, and is a high-noise picture. The noise comparison result obtained in this case is a second-type comparison result.

[0057] In actual implementation, reference factors and judgment conditions that can distinguish the first type of comparison results, the second type of comparison results, and the third type of comparison results can be set based on the collected reference image samples. In some embodiments, the noise contrast circuit 101 can be configured to: count the cumulative sum of the differences of pixel rows with positive differences in each pixel row, that is, the cumulative sum of the differences of the positive difference rows, to obtain a first reference value, and count the cumulative sum of the differences of pixel rows with negative differences in each pixel row, that is, the cumulative sum of the differences of the negative difference rows, to obtain a second reference value; count the number of positive and negative difference flips of adjacent pixel rows; and determine the noise contrast result based on the first reference value, the second reference value, and the number of positive and negative difference flips.

[0058] For example, the first reference value is a positive value and the second reference value is a negative value. The first reference value can be subtracted from the second reference value to obtain a third reference value; if the third reference value is greater than or equal to the preset first threshold value, and the number of positive and negative difference flips is greater than the preset number of flips, then the noise comparison result is a second type of comparison result; if the third reference value is greater than or equal to the preset second threshold value and less than the first threshold value, and the number of positive and negative difference flips is less than the preset number of flips, then the noise comparison result is a first type of comparison result, and the second threshold value is less than the first threshold value; if the third reference value is less than the second threshold value, and the number of positive and negative difference flips is less than the preset number of flips, then the noise comparison result is a third type of comparison result.

[0059] When the noise comparison results include: first-category comparison results, second-category comparison results, and third-category comparison results, for the first-category comparison results and the second-category comparison results, where there is a risk of false alarms and random alarms when switching between the two screens, the noise comparison circuit 101 can send an indication signal to the touch controller 102 to notify the touch controller 102 to perform appropriate touch noise preprocessing in a timely manner before displaying the next frame of image, thereby reducing the interference of noise on the touch detection results when switching between screens.

[0060] In some embodiments, the noise contrast circuit 101 is configured to send a first indication signal to the touch controller 102 if the noise contrast result is a first-category contrast result. The touch controller 102 is configured to, in response to the first indication signal, perform noise pre-compensation on the touch basic data corresponding to the next frame before displaying the next frame. This allows for noise pre-compensation to be performed in advance when the next frame is a medium-noise image compared to the current frame, allowing for timely compensation of noise in the touch basic data when the images switch, reducing noise interference with touch detection results and improving touch detection performance, such as false positives and random point reports.

[0061] To reduce the difficulty of noise pre-compensation and ensure the effectiveness of noise pre-compensation, in some embodiments, the display driver chip further includes a drive electrode controller 103 (Tx Control), which is electrically connected to the touch controller 102. The noise contrast circuit 101 is further configured to send a second indication signal to the touch controller 102 if the noise contrast result is a second type of contrast result. The touch controller 102 is further configured to adjust the target drive parameters of the drive electrode controller 103 before displaying the next frame of the image in response to the second indication signal. The target drive parameters may include one or more of a touch drive frequency, a touch scan time, and a touch drive voltage.

[0062] In some embodiments, the second type of comparison result may include: a first sub-result and a second sub-result. The first sub-result indicates that the current frame image is a low-noise image and the next frame image is a high-noise image. Conversely, the second sub-result indicates that the current frame image is a high-noise image and the next frame image is a low-noise image. For example, if the judgment conditions for the second type of comparison result are met, if the absolute value of the first reference value is greater than the absolute value of the second reference value, the noise comparison result is the first sub-result; if the absolute value of the first reference value is less than the absolute value of the second reference value, the noise comparison result is the second sub-result.

[0063] Accordingly, the second indication signal includes a first sub-signal and a second sub-signal. The noise contrast circuit 101 is configured to: send the first sub-signal to the touch controller 102 if the noise contrast result is the first sub-result; and send the second sub-signal to the touch controller 102 if the noise contrast result is the second sub-result. The touch controller 102 is configured to: in response to the first sub-signal, before displaying the next frame of image, control the drive electrode controller 103 to adjust the target drive parameter from the default value to the target value to reduce the interference of display noise on the touch detection result; and in response to the second sub-signal, before displaying the next frame of image, control the drive electrode controller 103 to restore the target drive parameter to the default value to reduce the power consumption of TP drive.

[0064] In some embodiments, the target drive parameters may include: touch drive frequency, touch scan time, and touch drive voltage. Accordingly, the target value of the touch drive frequency is a first preset value, the target value of the touch scan time is a second preset value, and the target value of the touch drive voltage is a third preset value. These target values ​​can be pre-configured during the TP debugging phase. The touch controller 102 is configured to: in response to the first sub-signal, before displaying the next frame of image, pre-control the drive electrode controller 103 to adjust the touch drive frequency (i.e., Tx drive frequency) to the first preset value, increase the touch scan time (i.e., Tx scan time) to the second preset value, and increase the touch drive voltage (i.e., Tx drive voltage) to the third preset value. Adjusting the touch drive frequency can be commonly known as frequency hopping, which is hopping to a clean frequency point to avoid display noise. Increasing the touch drive voltage is beneficial to improving the touch signal-to-noise ratio (SNR), thereby reducing the interference of display noise on touch detection results.

[0065] In other embodiments, the target drive parameter may include a touch drive frequency. The touch controller 102 is configured to: in response to the first sub-signal, read image information of the next frame of image transmitted by the noise contrast circuit 101, predetermine a target value of the touch drive frequency based on the image information of the next frame of image; and control the drive electrode controller 103 to adjust the touch drive frequency to the target value before displaying the next frame of image.

[0066] The noise comparison result is the first sub-result, indicating that the next image frame is a high-noise image. Touch controller 102 reads the image information of this high-noise image and, based on the read image information, predetermines a target touch drive frequency for displaying the next image frame. This adjusts the touch drive signal frequency to be offset from the noise signal, minimizing the impact of display noise on touch detection results. In some embodiments, the image information may include, for example, source drive data and gate drive data, such as GOA (Gate Driver on Array) data.

[0067] In some embodiments, the image type of the next frame of image can be determined based on the image information of the next frame of image, and then the display noise frequency corresponding to the image type can be determined based on the pre-stored correspondence between the image type and the display noise frequency, thereby pre-determining a touch drive frequency that can avoid the noise based on the display noise frequency of the next frame of image. The display noise frequency is the frequency of the noise generated when the image is displayed. For example, a preset frequency adjustment value can be subtracted or added to the display noise frequency to obtain the target value of the touch drive frequency. The image type can be set based on the type of high-noise image involved in the actual application scenario, for example, it can include: 1W1B image and 2W2B image, etc. The display noise frequency corresponding to different image types is different.

[0068] In other embodiments, the display noise frequency of high-noise images of various image types can be detected during TP debugging, and the touch drive frequency can be adjusted until the touch drive signal can avoid display noise, thereby obtaining a target touch drive frequency value corresponding to each high-noise image type. After determining the image type of the next frame, the touch controller 102 can determine the target touch drive frequency value corresponding to that image type based on a pre-stored correspondence between image types and target touch drive frequency values.

[0069] In some embodiments, the noise contrast circuit 101 is further configured to: if the noise contrast result is a third-category contrast result, perform a bypass process and do not send an indication signal to the touch controller 102. It should be noted that a third-category contrast result indicates that the display noise before and after the display screen switch is substantially the same, and there is no significant increase in display noise, which does not affect the touch detection result.

[0070] In some embodiments, the noise comparison result may further include a fourth type of comparison result, indicating that the display screen has switched from a medium-noise screen (such as a bright screen or a partially bright screen) to a normal low-noise screen. In this case, the noise comparison circuit 101 is further configured to: if the noise comparison result is the fourth type of comparison result, send a third indication signal to the touch controller 102. The touch controller 102 is further configured to: in response to the third indication signal, stop noise compensation for the touch basic data of the next frame of image.

[0071] In some embodiments, if the current frame image is the i-th frame image, and the next frame image is the i+1-th frame image, if the noise comparison result is a first-category comparison result, the noise comparison circuit 101 will instruct the touch controller 102 to pre-compensate the noise for the next frame image, i.e., the i+1-th frame image. When the touch controller 102 switches to displaying the next frame image, it can promptly compensate for the noise in the acquired touch basic data. At this point, the current frame image becomes the i+1-th frame image, and the next frame image is the i+2-th frame image. If the noise comparison result obtained by the noise comparison circuit 101 is a third-category comparison result, the noise comparison circuit 101 will not issue an instruction to the touch controller 102, and the touch controller 102 will continue to perform noise compensation for the next frame image (i+2-th frame image). If the noise comparison result obtained by the noise comparison circuit 101 is a fourth-category comparison result, the touch controller 102 will be instructed to stop noise compensation for the next frame image (i+2-th frame image).

[0072] It should be noted that the first indication signal, the first sub-signal, the second sub-signal and the third indication signal are different signals, so that the touch controller 102 can identify the noise comparison result and perform corresponding actions.

[0073] The following describes a process in which the touch controller 102 performs noise pre-compensation on the basic touch data acquired when displaying the next frame of image in response to the first instruction signal.

[0074] In some embodiments, the touch controller 102 can, in response to the first indication signal, read image information of the next frame of image transmitted by the noise contrast circuit 101, determine noise compensation data based on the image information of the next frame of image, and perform noise compensation on the basic touch data obtained when displaying the next frame of image based on the noise compensation data. It should be noted that the touch controller 102 receives the first indication signal, indicating that the noise contrast result is a first-class contrast result. Therefore, before displaying the next frame of image, it is necessary to pre-determine the noise compensation data for the next frame of image, that is, to pre-compensate the basic touch data corresponding to the next frame of image for noise, so that when switching to displaying the next frame of image, the predetermined noise compensation data can be used to promptly compensate for display noise.

[0075] In some embodiments, the noise compensation data may include a noise compensation value for each touch point. The noise compensation value for each touch point may be a positive value or a negative value, which is determined according to the needs of the actual application scenario, and the present disclosure does not impose any restrictions on this. Based on the noise compensation data, performing noise compensation on the touch basic data obtained when displaying the next frame of image may include: adding the touch basic data obtained when displaying the next frame of image to the noise compensation value to obtain the compensated touch basic data. Further, the compensated touch basic data is subtracted from the reference value to obtain a Diff value, which is compared with the reporting threshold to obtain a touch detection result. Of course, in other embodiments, the noise compensation data may also include other types of data, for example, it may include a noise compensation coefficient for each touch point, and the touch basic data obtained when displaying the next frame of image is multiplied by the noise compensation value to obtain the compensated touch basic data. It is configured according to the needs of the actual application scenario, and the present disclosure does not impose any restrictions on this.

[0076] There are various ways to determine noise compensation data based on the image information of the next frame. In some embodiments, the noise compensation type can be determined based on the image information of the next frame, and the noise compensation data corresponding to the noise compensation type can be determined based on a pre-stored correspondence between noise compensation data and noise compensation types.

[0077] In some embodiments, the noise compensation type may include, but is not limited to, a first compensation type and a second compensation type, wherein the first compensation type is applicable to compensating for noise generated by a highlighted image, and the second compensation type is applicable to compensating for noise generated by a partially bright screen image. In some embodiments, the noise compensation type required for the next frame of image can be determined based on the image information of the next frame of image. For example, if the image information includes source drive data, the average value of the source drive data of each pixel row is greater than a preset threshold, and the brightness uniformity is less than a preset percentage, then the next frame of image is determined to be a highlighted image and the first compensation type needs to be used. It is understandable that the smaller the brightness uniformity, the more uniform the brightness. In actual implementation, the possible noise compensation types can be configured based on the pre-collected reference image samples that need to be noise compensated, and the judgment rules for determining the adapted noise compensation type based on the image information of the next frame of image can be configured. The present disclosure does not impose any restrictions on this.

[0078] In some embodiments, during TP debugging, some reference image samples can be selected for each determined noise compensation type to perform display noise detection, and based on the noise detection results, noise compensation data applicable to the noise compensation type can be estimated, and the noise compensation data can be adjusted until the screen switches to these reference image samples, so that the expected noise compensation effect can be achieved, that is, the false alarm points, random alarm points and other adverse touch phenomena generated when the display screen switches to these reference image samples can be overcome.

[0079] For example, when the display screen is the partially bright screen screen shown in Figure 3, the noise generated by the display is uneven. Through noise detection, the display noise value of the dark screen area is relatively low, and the display noise value of the bright screen area is relatively high. Accordingly, if the noise compensation value is negative, the absolute value of the estimated noise compensation value of the dark screen area can be relatively low, and the absolute value of the noise compensation value of the bright screen area can be relatively high, to ensure the uniformity of the entire surface of the compensated TP Rawdata value. For example, after noise pre-compensation (such as adding the noise compensation value), the uniformity of the overall TP Rawdata value can be controlled within 10%. In this way, when the display screen switches from a normal (normol) screen to a partially bright screen screen, there will be no false alarm points or random alarm points and other poor touch phenomena.

[0080] Similarly, when the entire display is bright, the TP Rawdata value will increase overall. Based on the increase in the Rawdata value of each touch point, the noise compensation value for each touch point can be estimated and adjusted based on the actual TP debugging. Therefore, after noise pre-compensation (e.g., adding the noise compensation value), it is possible to eliminate false and random touch detection errors caused by the increase in Rawdata value due to increased display brightness.

[0081] In some embodiments, a first connection line and a second connection line may be provided between the noise contrast circuit 101 and the touch controller 102. The noise contrast circuit 101 may transmit an indication signal, such as the first indication signal, the second indication signal, and the third indication signal, to the touch controller 102 via the first connection line. The touch controller 102 may read the image information of the next frame of image from the noise contrast circuit 101 via the second connection line, such as the image information of the medium noise image or the high noise image. In some embodiments, the first connection line may be an INT signal transmission line. In some embodiments, the second connection line may be a BUS bus having a bandwidth of 10 to 12 bits.

[0082] In some embodiments, the touch and display driver chip 100 may further include: a data transmission interface 104, a random access memory 105, and a digital processor 106 (Data Processor). The data transmission interface 104 is configured to receive an image to be displayed, and may be, for example, a MIPI interface (Mobile Industry Processor Interface) or an SPI interface (Serial Peripheral Interface). The random access memory 105 is electrically connected to the data transmission interface 104 and is configured to store the image to be displayed. The random access memory 105 may be, for example, an image register (Graphics Random Access Memory). The digital processor 106 is electrically connected to the random access memory 105 and is configured to read the image to be displayed from the random access memory 105 and perform pre-processing on the image to be displayed, for example, decompression processing and elimination of uneven brightness (mura), etc., which can be referred to in related art and will not be described in detail here.

[0083] In some embodiments, the noise contrast circuit 101 can be electrically connected to the digital processor 106 so as to obtain image information of the current frame image and image information of the next frame image from the digital processor 106. In other embodiments, the noise contrast circuit 101 can be electrically connected to the digital processor 106 and the random access memory 105 respectively so as to obtain image information of the current frame image from the digital processor 106 and read image information of the next frame image from the random access memory 105. Of course, in other embodiments, the noise contrast circuit 101 can be electrically connected to the data transmission interface 104 and the digital processor 106 respectively, or the noise contrast circuit 101 can be electrically connected to the data transmission interface 104, the random access memory 105, and the digital processor 106 respectively. It should be noted that the connection relationship between the noise contrast circuit 101 and the data transmission interface 104, the random access memory 105, and the digital processor 106 can be set according to the needs of the actual application scenario, as long as the image information of the current frame image and the image information of the next frame image can be obtained, and the present disclosure is not limited to this.

[0084] In some embodiments, the noise contrast circuit 101 may be a logic circuit, and may be independently provided with the digital processor 106, or may be integrated with the digital processor 106. In some embodiments, the touch controller 102 may include an MCU, or may also include other processors with data processing functions.

[0085] It should be noted that in addition to the above circuit structure, the touch and display driver chip 100 also includes other circuit structures, such as a timing controller 107 (TCON), a source driver 108 (Source Driver), a voltage converter 109 (Level Shifter, LS), an analog-to-digital converter 110 (ADC), a touch analog front-end 111 (Touch Analog Front-End, Touch AFE), and a drive waveform generator 112 (Tx Wave). The timing controller 107 is electrically connected to the data transmission interface 104, the digital processor 106, the source driver 108, and the voltage converter 109, respectively. The drive waveform generator 112 is electrically connected to the drive electrode controller 103, and the analog-to-digital converter 110 is electrically connected to the touch controller 102.

[0086] In some embodiments, the touch structure in the touch display panel may include a plurality of first touch electrodes extending along a first direction and a plurality of second touch electrodes extending along a second direction; the first direction and the second direction intersect. One of the first touch electrode and the second touch electrode is a driving electrode (Tx), and the other is a sensing electrode (Rx). The above-mentioned driving waveform generator 112 is electrically connected to each driving electrode (such as Tx0~Tx39) through a first touch circuit to send a touch driving signal thereto, and the touch analog front end 111 is electrically connected to the sensing electrodes (such as Rx0~Rx39) through a second touch circuit to receive the touch sensing signal. For details, please refer to the relevant technology and will not be described in detail here.

[0087] FIG6 shows a schematic structural diagram of a touch display device according to some embodiments of the present disclosure. As shown in FIG6 , some embodiments of the present disclosure further provide a touch display device 1, comprising: a touch display panel 10 and a touch and display driver chip 100 provided in any of the above embodiments. The touch and display driver chip 100 is electrically connected to the touch display panel 10. The touch display device 1 can be, for example, a display screen with touch and display functions, a wearable display product (such as a bracelet, a watch, glasses, and a helmet, etc.), a television, a tablet computer, a laptop computer, a mobile phone, a digital photo frame, a navigator, and other products or components. Of course, the touch display device provided in the embodiments of the present disclosure is not limited to the types listed above.

[0088] Some embodiments of the present disclosure also provide a touch noise processing method, which is applied to a touch display device. In some embodiments, when the computing power of a touch controller such as an MCU in the touch display device is large enough, the touch noise processing method can be executed by the touch controller. Of course, in other embodiments, it can also be executed by other processors in the touch display device, and the present disclosure does not limit this. Figure 7 shows a flowchart of a touch noise processing method according to some embodiments of the present disclosure. As shown in Figure 7, the touch noise processing method may include the following steps S101 and S102.

[0089] Step S101 : Compare the image information of the current frame image with the image information of the next frame image to obtain a noise comparison result. The noise comparison result is used to characterize the change of display noise when switching from the current frame image to the next frame image.

[0090] Step S102 : Based on the noise comparison result, touch noise preprocessing is performed on the next frame image before the next frame image is displayed.

[0091] It should be noted that the specific implementation process and effects of step S101 and step S102 can refer to the relevant description in the above embodiment and will not be repeated here.

[0092] In some embodiments, the touch noise preprocessing process for the next image frame based on the noise comparison result before displaying the next image frame may include: if the noise comparison result is a first-class comparison result, then performing noise pre-compensation on the touch basic data corresponding to the next image frame before displaying the next image frame. The specific implementation process and effects can be referred to the relevant description of the above embodiment and will not be repeated here.

[0093] In some embodiments, the touch noise preprocessing process for the next image frame based on the noise comparison result before displaying the next image frame may further include: if the noise comparison result is a second type of comparison result, adjusting target drive parameters of the drive electrode controller before displaying the next image frame. The target drive parameters include one or more of the touch drive frequency, touch scan time, and touch drive voltage. The specific implementation process and effects can be referred to the relevant description of the above embodiment and will not be repeated here.

[0094] Some embodiments of the present disclosure further provide a touch display device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the above-mentioned touch noise processing method when executed by the processor. For specific steps, please refer to the relevant description of the above-mentioned method embodiment, which will not be repeated here. The touch display device can, for example, be a display screen with touch and display functions, a wearable display product (such as a bracelet, a watch, glasses, and a helmet, etc.), a television, a tablet computer, a laptop computer, a mobile phone, a digital photo frame, a navigator, and other products or components. Of course, the touch display device provided in the embodiments of the present disclosure is not limited to the types listed above.

[0095] Some embodiments of the present disclosure further provide a computer program product. When the computer program product is executed by a processor, it implements the steps of the above-mentioned touch noise processing method and can achieve the same technical effects. To avoid repetition, it is not described here.

[0096] Some embodiments of the present disclosure further provide a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned touch noise processing method are implemented and the same technical effect can be achieved. To avoid repetition, they are not described here. For example, the computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0097] It should be noted that the drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures can refer to general designs. In the absence of conflict, the embodiments of the present disclosure and the features therein can be combined with each other to obtain new embodiments.

[0098] Although some embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present disclosure.

Claims

1. A touch and display driver chip, applied to a touch display panel, comprising: a noise contrast circuit and a touch controller, wherein the noise contrast circuit is electrically connected to the touch controller; The noise contrast circuit is configured to: compare image information of a current frame image with image information of a next frame image to obtain a noise contrast result, and send an indication signal to the touch controller based on the noise contrast result, wherein the noise contrast result is used to represent a change in display noise when switching from the current frame image to the next frame image; as well as The touch controller is configured to: in response to the indication signal, perform touch noise preprocessing on the next frame image before displaying the next frame image.

2. The touch and display driver chip according to claim 1, wherein: The noise comparison circuit is configured to: if the noise comparison result is a first type of comparison result, send a first indication signal to the touch controller; And the touch controller is configured to: in response to the first indication signal, perform noise pre-compensation on the touch basic data corresponding to the next frame image before displaying the next frame image.

3. The touch and display driver chip according to claim 1, further comprising: A driving electrode controller, the driving electrode controller is electrically connected to the touch controller, wherein: The noise comparison circuit is configured to: if the noise comparison result is a second type of comparison result, send a second indication signal to the touch controller; and The touch controller is configured to: in response to the second indication signal, adjust the target driving parameters of the driving electrode controller before displaying the next frame image, and the target driving parameters include: one or more of: touch driving frequency, touch scanning time and touch driving voltage.

4. The touch and display driver chip according to claim 3, wherein: The second type of comparison result includes: a first sub-result and a second sub-result, and the second indication signal includes: a first sub-signal and a second sub-signal; The noise contrast circuit is configured to: send the first sub-signal to the touch controller if the noise contrast result is a first sub-result, and send the second sub-signal to the touch controller if the noise contrast result is a second sub-result; and The touch controller is configured to: in response to the first sub-signal, control the drive electrode controller to adjust the target drive parameter from the default value to the target value before displaying the next frame image; in response to the second sub-signal, control the drive electrode controller to restore the target drive parameter to the default value before displaying the next frame image.

5. The touch and display driver chip according to claim 4, wherein: The target value includes: a pre-configured first preset value, a second preset value and a third preset value; the touch controller is configured to: in response to the first sub-signal, before displaying the next frame image, control the drive electrode controller to adjust the touch drive frequency to the first preset value, increase the touch scan time to the second preset value, and increase the touch drive voltage to the third preset value.

6. The touch and display driver chip according to claim 4, wherein: The target driving parameter includes a touch driving frequency, and the touch controller is configured to: In response to the first sub-signal, the image information of the next frame of image transmitted by the noise contrast circuit is read, and the target value of the touch drive frequency is determined based on the image information of the next frame of image; so as to control the drive electrode controller to adjust the touch drive frequency to the target value before displaying the next frame of image.

7. The touch and display driver chip according to claim 1, wherein: The noise comparison circuit is configured to perform bypass processing if the noise comparison result is a third type of comparison result.

8. The touch and display driver chip according to claim 2, wherein: The noise comparison circuit is further configured to: send a third indication signal to the touch controller if the noise comparison result is a fourth type of comparison result; the touch controller is further configured to: stop noise compensation for the touch basic data of the next frame image in response to the third indication signal.

9. The touch and display driver chip according to claim 1, wherein: The image information includes source drive data. The noise contrast circuit is configured to calculate the difference between the source drive data of the same pixel row in the current frame image and the next frame image, and obtain the noise contrast result based on the difference in each pixel row.

10. The touch and display driver chip according to claim 9, wherein: The noise contrast circuit is configured as follows: accumulating the difference values ​​of the pixel rows with positive difference values ​​in each pixel row to obtain a first reference value, and accumulating the difference values ​​of the pixel rows with negative difference values ​​in each pixel row to obtain a second reference value; Count the number of positive and negative difference flips between adjacent pixel rows; as well as The noise comparison result is determined according to the first reference value, the second reference value, and the number of positive and negative difference flips.

11. The touch and display driver chip according to claim 2, wherein: The touch controller is configured to: in response to the first indication signal, read the image information of the next frame image transmitted by the noise contrast circuit, determine noise compensation data based on the image information of the next frame image, and perform noise compensation on the touch basic data obtained when displaying the next frame image based on the noise compensation data.

12. The touch and display driver chip according to claim 11, wherein: The touch controller is configured to determine a noise compensation type based on image information of the next frame image, and determine noise compensation data corresponding to the noise compensation type based on a pre-stored correspondence between noise compensation data and noise compensation types.

13. The touch and display driver chip according to claim 1, further comprising: A data transmission interface configured to receive an image to be displayed; a random access memory, electrically connected to the data transmission interface and configured to store the image to be displayed; as well as a digital processor, electrically connected to the random access memory, and configured to read an image to be displayed from the random access memory and perform pre-processing on the image to be displayed before display; The noise contrast circuit is electrically connected to the digital processor, or the noise contrast circuit is electrically connected to the digital processor and the random access memory respectively, or the noise contrast circuit is electrically connected to the data transmission interface and the digital processor respectively.

14. The touch and display driver chip according to claim 13, wherein: The noise contrast circuit and the digital processor are independently provided, or the noise contrast circuit is a logic circuit integrated with the digital processor.

15. The touch and display driver chip according to claim 1, wherein: The touch controller includes a micro control unit.

16. A touch display device, comprising: A touch display panel and the touch and display driver chip according to any one of claims 1 to 15, wherein the touch and display driver chip is electrically connected to the touch display panel.

17. A touch noise processing method, comprising: Comparing the image information of the current frame image with the image information of the next frame image to obtain a noise comparison result, wherein the noise comparison result is used to characterize the change in display noise from switching from the current frame image to the next frame image; as well as Based on the noise comparison result, touch noise preprocessing is performed on the next frame image before displaying the next frame image.

18. A touch display device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the touch noise processing method according to claim 17 when executed by the processor.

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