CN113721095B - Sensitivity calibration method of touch system, microcontroller and touch system - Google Patents
Sensitivity calibration method of touch system, microcontroller and touch system Download PDFInfo
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Abstract
The disclosure provides a sensitivity calibration method of a touch system, a microcontroller and the touch system. The sensitivity calibration method comprises the following steps: acquiring a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage; the current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module; under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value, adjusting the current first control voltage or the current second control voltage, and returning to the step of acquiring the current oscillation frequency; and ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value. The method and the device can realize automatic calibration of the sensitivity of the touch control system.
Description
Technical Field
The disclosure relates to the technical field of touch control, in particular to a sensitivity calibration method of a touch control system, a microcontroller and the touch control system.
Background
In the track dimming system, the transmittance of the dimming layer needs to be adjusted by key touch. In order to adapt to different environmental variables, such as different front glass thicknesses, different electric field environments, and the like, the sensitivity of the touch key needs to be set to an adjustable mode. In general, the microcontroller (Microcontroller Unit, MCU) can control the digital potentiometer to output a control voltage through a control signal, so as to adjust the potential of the sensitivity pin of the touch chip, and further adjust the sensitivity of the key. To adjust the sensitivity of the different keys to be uniform, the microcontroller may send the same control signal to the different digital potentiometers.
However, in the practical application process, because the digital potentiometers have performance differences, even if the control signals of the microcontrollers are the same, the control voltages output by different digital potentiometers also have differences, so that the sensitivity of corresponding different keys is difficult to adjust consistently, for example, the left key is sensitive and can be sensed by lightly touching, but the right key needs to be pressed very hard to sense, and the touch experience of a user is poor.
Disclosure of Invention
The disclosure provides a sensitivity calibration method of a touch system, a microcontroller and the touch system.
In a first aspect, the present disclosure provides a sensitivity calibration method of a touch system, where the touch system includes a first touch module and a second touch module, the sensitivity calibration method includes:
Acquiring a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage; the current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module;
When the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value, adjusting the current first control voltage or the current second control voltage, and returning to the step of acquiring the current oscillation frequency;
And ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value.
In some embodiments, before said adjusting the current first control voltage or the current second control voltage, further comprising:
And storing the current frequency difference as a historical frequency difference.
In some embodiments, the step of adjusting the current first control voltage or the current second control voltage comprises:
performing preliminary adjustment on the current first control voltage or the current second control voltage;
the current oscillation frequency after preliminary adjustment is obtained again;
and adjusting the current first control voltage or the current second control voltage based on a comparison result of the current frequency difference and the historical frequency difference, wherein the current frequency difference is the difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency.
In some embodiments, the preliminary adjustment of the current first control voltage or the current second control voltage comprises:
Adjusting the current first control voltage or adjusting the current second control voltage;
wherein the adjustment process includes: increasing the preset basic voltage value or decreasing the preset basic voltage value.
In some embodiments, in the case that the current first control voltage is increased by a preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value;
and when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
In some embodiments, in the case that the current second control voltage is increased by a preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value;
And when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
In a second aspect, the present disclosure provides a microcontroller comprising:
The acquisition module is used for acquiring the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage; the current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module;
The adjusting module is used for adjusting the current first control voltage or the current second control voltage under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value, and returning to the step of acquiring the current oscillation frequency by the acquiring module;
And the control module is used for ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value.
In some embodiments, the microcontroller further comprises:
and the storage module is used for storing the current frequency difference as a historical frequency difference.
In some embodiments, the adjustment module includes a first adjustment unit and a second adjustment unit;
The first adjusting unit is used for primarily adjusting the current first control voltage or the current second control voltage;
The acquisition module is further used for reacquiring the current oscillation frequency after preliminary adjustment;
The second adjusting unit is configured to adjust the current first control voltage or the current second control voltage based on a comparison result of the current frequency difference and the historical frequency difference, where the current frequency difference is a difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency.
In some embodiments, the first adjusting unit is specifically configured to perform an adjustment process on the current first control voltage or perform an adjustment process on the current second control voltage;
wherein the adjustment process includes: increasing the preset basic voltage value or decreasing the preset basic voltage value.
In some embodiments, the first adjusting unit is configured to, in a case where the first control voltage increases by a preset basic voltage value during the preliminary adjustment, the second adjusting unit is configured to:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value;
and when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
In some embodiments, the first adjusting unit is configured to, in a case where the current second control voltage is increased by a preset basic voltage value in the preliminary adjustment process, the second adjusting unit:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value;
And when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
In a third aspect, the present disclosure provides a touch system comprising a first touch module, a second touch module, a feedback signal processing circuit, and a microcontroller as provided in the second aspect of the present disclosure;
The feedback signal processing circuit is used for acquiring the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage;
The microcontroller is used for receiving the current oscillation frequency and calibrating the sensitivity of the first touch module and the second touch module based on the current oscillation frequency.
In some embodiments, the touch system further comprises: a first touch voltage generating device corresponding to the first touch module and a second touch voltage generating device corresponding to the second touch module;
The microcontroller is used for outputting a current first control signal to the first touch voltage generating device and adjusting the current first control signal according to the current first control voltage after each adjustment;
the first touch voltage generation device is used for generating a current first control voltage according to a current first control signal of the microcontroller;
The microcontroller is further configured to output a current second control signal to the second touch voltage generating device, and adjust the current second control signal according to the adjusted current second control voltage each time;
The second touch voltage generation device is used for generating a current second control voltage according to a current second control signal of the microcontroller.
In some embodiments, the feedback signal processing circuit comprises: an operational amplifier, a voltage-controlled oscillation circuit and a low-pass filter;
The operational amplifier is used for acquiring the voltage difference between the current first control voltage and the current second control voltage;
The voltage-controlled oscillation circuit is used for acquiring the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage;
The low-pass filter is used for filtering the current oscillation frequency to filter noise signals.
Drawings
Fig. 1 is a flowchart of a method for calibrating sensitivity of a touch system according to an embodiment of the disclosure;
fig. 2 is a flowchart of another method for calibrating sensitivity of a touch system according to an embodiment of the disclosure;
FIG. 3 is a flowchart of a method for calibrating sensitivity of a touch system according to another embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a microcontroller according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a touch system according to an embodiment of the disclosure.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the technical solutions of the sensitivity calibration method, the microcontroller and the touch system of the touch system provided by the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure.
Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements/structures, these elements/structures should not be limited by these terms. These terms are only used to distinguish one element/structure from another element/structure.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Fig. 1 is a flowchart of a sensitivity calibration method of a touch system according to an embodiment of the disclosure. The sensitivity calibration method of the touch system is applied to a microcontroller in the touch system, wherein the touch system further comprises a first touch module and a second touch module.
As shown in fig. 1, the method for calibrating sensitivity of a touch system according to an embodiment of the disclosure includes the following steps:
Step S101, obtaining a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage.
The current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module. The voltage difference between the current first control voltage and the current second control voltage is an absolute value obtained by subtracting the voltage value corresponding to the current first control voltage from the voltage value corresponding to the current second control voltage. The voltage difference between the current first control voltage and the current second control voltage is positively correlated with the corresponding current oscillation frequency, that is, the larger the voltage difference is, the larger the current oscillation frequency corresponding to the voltage difference is.
In some embodiments, the current oscillation frequency is obtained by a feedback signal processing circuit for which the input is the current first control voltage and the current second control voltage and the output is the current oscillation frequency.
In one embodiment, the feedback signal processing circuit still has an output frequency, which is the reference oscillation frequency, when the voltage difference between the two input voltages is 0. Therefore, when the voltage difference between the current first control voltage and the current second control voltage is 0, the current oscillation frequency is the reference oscillation frequency.
In one embodiment, to ensure that the sensitivity of the first touch module and the sensitivity of the second touch module meet the requirement of consistent sensitivity, the voltage difference between the current first control voltage and the current second control voltage needs to be less than a preset error, where the preset error may be 2LSB (LEAST SIGNIFICANT Bit ). That is, the current frequency difference between the current oscillation frequency and the reference oscillation frequency needs to be less than or equal to a preset threshold value. The preset threshold is a frequency value correspondingly set based on a preset error. For example, the preset threshold may be a difference between an oscillation frequency corresponding to a voltage difference of 2LSB and a reference oscillation frequency.
Step S102, judging whether the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value.
The method comprises the steps of judging whether the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value or not, and determining whether the sensitivity of the first touch module and the sensitivity of the second touch module meet the requirement of consistent sensitivity or not.
Step S103, when the current frequency difference between the current oscillation frequency and the reference oscillation frequency is greater than a preset threshold value, the current first control voltage or the current second control voltage is adjusted, and the step of obtaining the current oscillation frequency is returned.
Under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value, the fact that the sensitivity of the first touch module is poor in consistency with the sensitivity of the second touch module is indicated, and sensitivity calibration is needed. Therefore, the current first control voltage or the current second control voltage is adjusted to calibrate the sensitivity, and the step of acquiring the current oscillation frequency is returned to determine whether the sensitivity of the first touch module and the sensitivity of the second touch module meet the requirement of consistent sensitivity after the current first control voltage or the current second control voltage is adjusted. According to the embodiment, the negative feedback mechanism is introduced to automatically adjust the current first control voltage or the current second control voltage, so that the sensitivity is calibrated.
Step S104, ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value.
Under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value, the consistency of the sensitivity of the first touch module and the sensitivity of the second touch module is high, and the sensitivity calibration is not needed at this time, so that the flow of the sensitivity calibration of the touch system can be ended.
The embodiment of the disclosure provides a sensitivity calibration method of a touch system, which includes the steps of firstly, acquiring a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage, wherein the current first control voltage is a voltage currently used for adjusting the sensitivity of a first touch module, the current second control voltage is a voltage currently used for adjusting the sensitivity of a second touch module, then, adjusting the current first control voltage or the current second control voltage under the condition that a current frequency difference between the current oscillation frequency and a reference oscillation frequency is larger than a preset threshold value, and returning to the step of acquiring the current oscillation frequency, so that the sensitivity of the touch system can be automatically calibrated, and ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to the preset threshold value.
Fig. 2 is a flowchart of another method for calibrating sensitivity of a touch system according to an embodiment of the disclosure. In one embodiment, in the case that the current oscillation frequency is greater than the preset threshold (step S103), it is indicated that the consistency of the sensitivity of the first touch module and the sensitivity of the second touch module is poor, and the sensitivity calibration needs to be performed, that is, the current first control voltage or the current second control voltage needs to be adjusted. However, since the magnitude relation between the present first control voltage and the present second control voltage is unknown, it is difficult to determine the adjustment direction (increasing voltage or decreasing voltage) when adjusting the present first control voltage or the present second control voltage. Therefore, the embodiment of the present disclosure provides another method for calibrating sensitivity of a touch system, before adjusting the current first control voltage or the current second control voltage, as shown in fig. 2, further including step S201:
step S201, the current frequency difference is stored as a history frequency difference.
After storing the current frequency difference as the historical frequency difference, as shown in fig. 2, the step of adjusting the current first control voltage or the current second control voltage in this embodiment includes:
Step S202, the current first control voltage or the current second control voltage is adjusted preliminarily.
In one embodiment, the preliminary adjustment of the current first control voltage or the current second control voltage comprises: and adjusting the current first control voltage or adjusting the current second control voltage.
Wherein the adjustment process includes: increasing the preset basic voltage value or decreasing the preset basic voltage value. The preset basic voltage value is a minimum adjustment unit for adjusting the control voltage, and is, for example, 1LSB.
Step S203, the current oscillation frequency after preliminary adjustment is retrieved.
Step S204, based on the comparison result of the current frequency difference and the historical frequency difference, the current first control voltage or the current second control voltage is adjusted.
The current frequency difference is the difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency.
It should be noted that, in this embodiment, the current first control voltage or the current second control voltage is initially adjusted when the current oscillation frequency is greater than the preset threshold, that is, the voltage difference between the current first control voltage and the current second control voltage is greater than 2LSB before the initial adjustment. The adjustment process only increases the preset basic voltage value (1 LSB) or decreases the preset basic voltage value (1 LSB), so that after the current first control voltage or the current second control voltage is initially adjusted, the magnitude relationship between the current first control voltage and the current second control voltage is not changed, and the current frequency difference and the historical frequency difference are not equal.
It should be noted that, through the comparison result between the current frequency difference and the historical frequency difference in the steps S202-S203 and S204, the magnitude relation between the current first control voltage and the current second control voltage can be determined. For example:
Case one: in the preliminary adjustment process of step S202, the current first control voltage is increased by a preset basic voltage value, and if the comparison result is that the current frequency difference is greater than the historical frequency difference, it is determined that the current first control voltage is greater than the current second control voltage. In this case, the current first control voltage may be adjusted to be small, or the current second control voltage may be adjusted to be large.
In this case, when the current first control voltage is increased by the preset basic voltage value, the current frequency difference is larger than the historical frequency difference, which means that the current oscillation frequency becomes larger, that is, the voltage difference between the current first control voltage and the current second control voltage becomes larger. And only if the current first control voltage is larger than the current second control voltage, increasing the current first control voltage by a preset basic voltage value, wherein the voltage difference between the current first control voltage and the current second control voltage is larger.
And a second case: in the preliminary adjustment process of step S202, the current first control voltage is increased by a preset basic voltage value, and if the comparison result is that the current frequency difference is smaller than the historical frequency difference, it is determined that the current first control voltage is smaller than the current second control voltage. In this case, the current first control voltage may be adjusted to be large, or the current second control voltage may be adjusted to be small.
And a third case: in the preliminary adjustment process of step S202, the current second control voltage is increased by a preset basic voltage value, and the comparison result is that the current first control voltage is smaller than the current second control voltage when the current frequency difference is greater than the historical frequency difference. In this case, the current first control voltage may be adjusted to be large, or the current second control voltage may be adjusted to be small.
Case four: in the preliminary adjustment process of step S202, the current second control voltage is increased by a preset basic voltage value, and the comparison result is that the current first control voltage is greater than the current second control voltage when the current frequency difference is smaller than the historical frequency difference. In this case, the current first control voltage may be adjusted to be small, or the current second control voltage may be adjusted to be large.
Case five: in the preliminary adjustment process of step S202, the current first control voltage is reduced by a preset basic voltage value, and the comparison result is that the current first control voltage is smaller than the current second control voltage when the current frequency difference is greater than the historical frequency difference. In this case, the current first control voltage may be adjusted to be large, or the current second control voltage may be adjusted to be small.
In this case, when the current first control voltage is reduced by the preset basic voltage value, the current frequency difference is larger than the historical frequency difference, which means that the current oscillation frequency becomes larger, that is, the voltage difference between the current first control voltage and the current second control voltage becomes larger. And only if the current first control voltage is smaller than the current second control voltage, reducing the current first control voltage by a preset basic voltage value, wherein the voltage difference between the current first control voltage and the current second control voltage is larger.
Case six: in the preliminary adjustment process of step S202, the current first control voltage is reduced by a preset basic voltage value, and the comparison result is that the current first control voltage is greater than the current second control voltage when the current frequency difference is smaller than the historical frequency difference. In this case, the current first control voltage may be adjusted to be small, or the current second control voltage may be adjusted to be large.
Case seven: in the preliminary adjustment process of step S202, the current second control voltage is reduced by a preset basic voltage value, and if the comparison result is that the current frequency difference is greater than the historical frequency difference, the current first control voltage is greater than the current second control voltage. In this case, the current first control voltage may be adjusted to be small, or the current second control voltage may be adjusted to be large.
Case eight: in the preliminary adjustment process of step S202, the current second control voltage is reduced by a preset basic voltage value, and if the comparison result is that the current frequency difference is smaller than the historical frequency difference, the current first control voltage is smaller than the current second control voltage. In this case, the current first control voltage may be adjusted to be large, or the current second control voltage may be adjusted to be small.
In one embodiment, when the current first control voltage is increased by the preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
step one, obtaining a current voltage adjustment value corresponding to the current frequency difference.
In one embodiment, the current frequency difference may be obtained corresponding to the current voltage adjustment value based on a pre-stored table of correspondence between frequencies and voltage adjustment values.
And step two, when the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
When the comparison result indicates that the current frequency difference is greater than the historical frequency difference, according to the first condition, the current first control voltage is greater than the current second control voltage, and in order to reduce the voltage difference between the first control voltage and the second control voltage within the preset error, the current first control voltage is reduced by the voltage corresponding to the current voltage adjustment value, or the current second control voltage is increased by the voltage corresponding to the current voltage adjustment value.
And step three, under the condition that the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
When the comparison result indicates that the current frequency difference is smaller than the historical frequency difference, according to the second condition, the current first control voltage is smaller than the current second control voltage, and in order to reduce the voltage difference between the first control voltage and the second control voltage within the preset error, the current first control voltage is increased by the voltage corresponding to the current voltage adjustment value, or the current second control voltage is reduced by the voltage corresponding to the current voltage adjustment value.
In another embodiment, in the case that the current second control voltage is increased by the preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
step one, obtaining a current voltage adjustment value corresponding to the current frequency difference.
And step two, when the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
And step three, under the condition that the current frequency difference is smaller than the historical frequency difference as a comparison result, increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
In still another embodiment, in the case that the current first control voltage is reduced by the preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
step one, obtaining a current voltage adjustment value corresponding to the current frequency difference.
And step two, under the condition that the comparison result is that the current frequency difference is larger than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
When the comparison result indicates that the current frequency difference is greater than the historical frequency difference, according to the fifth aspect, the current first control voltage is smaller than the current second control voltage, and in order to reduce the voltage difference between the first control voltage and the second control voltage within the preset error, the current first control voltage is increased by the voltage corresponding to the current voltage adjustment value, or the current second control voltage is reduced by the voltage corresponding to the current voltage adjustment value.
And step three, when the comparison result is that the current frequency difference is smaller than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
When the comparison result indicates that the current frequency difference is smaller than the historical frequency difference, it is known from the sixth situation that the current first control voltage is larger than the current second control voltage, and in order to reduce the voltage difference between the first control voltage and the second control voltage within the preset error, the current first control voltage is reduced by the voltage corresponding to the current voltage adjustment value, or the current second control voltage is increased by the voltage corresponding to the current voltage adjustment value.
In still another embodiment, in the case that the current second control voltage is reduced by the preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
step one, obtaining a current voltage adjustment value corresponding to the current frequency difference.
And step two, when the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
And step three, under the condition that the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
Fig. 3 is a flowchart of a sensitivity calibration method of a touch system according to another embodiment of the disclosure. In one embodiment, the sensitivities of the first touch module and the second touch module in the touch system may be adjusted in advance, and the sensitivity of any one of the first touch module and the second touch module is defaulted to be standard sensitivity, that is, the sensitivity adjustment voltage corresponding to the touch module is defaulted to be standard sensitivity. In the process of performing sensitivity calibration, the standard sensitivity adjustment voltage can be kept unchanged, and only the other control voltage is adjusted. For example, the sensitivity of the current first touch module is defaulted to be standard sensitivity, that is, the current first control voltage is defaulted to be the standard sensitivity adjustment voltage, and in the process of performing sensitivity calibration, the first control voltage can be kept unchanged, and only the second control voltage is adjusted. In this embodiment, as shown in fig. 3, the method for calibrating sensitivity of the touch system includes the following steps:
Step S301, obtaining a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage.
Step S302, acquiring a current frequency difference between the current oscillation frequency and the reference oscillation frequency.
Step S303, judging whether the current frequency difference is larger than a preset threshold. In the case where the current frequency difference between the current oscillation frequency and the reference oscillation frequency is less than or equal to the preset threshold value, the following step S304 is performed. In the case where the current oscillation frequency is greater than the preset threshold, the following step S305 is performed.
Step S304, finishing the sensitivity calibration of the touch system.
Step S305, the current frequency difference is stored as a history frequency difference.
Step S306, performing preliminary adjustment on the current second control voltage: and increasing the current second control voltage by a preset basic voltage value.
Step S307, reacquiring the current oscillation frequency after preliminary adjustment.
Step S308, the current frequency difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency is obtained.
Step S309, comparing whether the current frequency difference is smaller than the historical frequency difference. In the case where the comparison result is that the current frequency difference is greater than the historical frequency difference, the following step S310 is performed. In the case where the comparison result is that the current frequency difference is smaller than the historical frequency difference, the following step S311 is performed.
Step S310, a current voltage adjustment value corresponding to the current frequency difference is obtained, the current second control voltage is reduced by the voltage corresponding to the current voltage adjustment value, and the step of obtaining the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage is returned.
Step S311, obtaining a current voltage adjustment value corresponding to the current frequency difference, increasing the current second control voltage by a voltage corresponding to the current voltage adjustment value, and returning to the step of obtaining a current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage.
By the method for calibrating the sensitivity of the touch system, which is provided by the embodiment of the disclosure, the self calibration of the sensitivity of the touch system can be realized, manual configuration and trial and error are not needed, and the debugging cost can be saved.
Fig. 4 is a schematic structural diagram of a microcontroller according to an embodiment of the present disclosure. As shown in fig. 4, the microcontroller includes: an acquisition module 41, an adjustment module 42 and a control module 43.
The acquiring module 41 is configured to acquire a current oscillation frequency corresponding to a voltage difference between the current first control voltage and the current second control voltage.
The current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module.
The adjusting module 42 is configured to adjust the current first control voltage or the current second control voltage if the current frequency difference between the current oscillation frequency and the reference oscillation frequency is greater than a preset threshold, and return to the step of acquiring the current oscillation frequency by the acquiring module 41.
In one embodiment, the microcontroller further comprises: and a storage module. The storage module is used for storing the current frequency difference as a historical frequency difference.
In one embodiment, the adjustment module includes a first adjustment unit and a second adjustment unit.
The first adjusting unit is used for primarily adjusting the current first control voltage or the current second control voltage.
The first adjusting unit is specifically used for adjusting the current first control voltage or adjusting the current second control voltage; wherein the adjustment process includes: increasing the preset basic voltage value or decreasing the preset basic voltage value.
The acquisition module is further configured to reacquire the current oscillation frequency after preliminary adjustment.
The second adjusting unit is configured to adjust the current first control voltage or the current second control voltage based on a comparison result of the current frequency difference and the historical frequency difference. The current frequency difference is the difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency.
In one embodiment, in the case that the first adjusting unit increases the current first control voltage by a preset basic voltage value in the preliminary adjusting process, the second adjusting unit is specifically configured to: acquiring a current voltage adjustment value corresponding to the current frequency difference; when the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value; and under the condition that the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
In another embodiment, in the case that the first adjusting unit increases the current second control voltage by a preset basic voltage value in the preliminary adjusting process, the second adjusting unit is specifically configured to: acquiring a current voltage adjustment value corresponding to the current frequency difference; when the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value; and when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
The control module 43 is configured to end the sensitivity calibration of the touch system when the current frequency difference between the current oscillation frequency and the reference oscillation frequency is less than or equal to a preset threshold.
The embodiment of the disclosure provides a microcontroller, an acquisition module is used for acquiring a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage, wherein the current first control voltage is a voltage currently used for adjusting the sensitivity of a first touch module, the current second control voltage is a voltage currently used for adjusting the sensitivity of a second touch module, an adjustment module is used for adjusting the current first control voltage or the current second control voltage under the condition that the current oscillation frequency is greater than a preset threshold value, and the acquisition module returns to acquire the current oscillation frequency, so that the automatic calibration of the sensitivity of a touch system can be realized, and the control module ends the sensitivity calibration of the touch system under the condition that the current oscillation frequency is less than or equal to the preset threshold value.
Fig. 5 is a schematic structural diagram of a touch system according to an embodiment of the disclosure. As shown in fig. 5, the touch system includes: the touch control device comprises a first touch control module 51, a second touch control module 52, a feedback signal processing circuit 53 and a microcontroller 54.
Each touch module comprises an induction device and a touch driving chip. For example, the first touch module 51 includes a first sensing device and a first touch driving chip, and the second touch module 52 includes a second sensing device and a second touch driving chip.
In one embodiment, the touch system includes a track dimming system, and the sensing device may be a touch key, for example, a self-contained key light bar of ITO material. The first touch module 51 may be a left touch button of the track dimming system, and the second touch module 52 may be a right touch button of the track dimming system.
In one embodiment, the touch driving core is connected with the sensing device, and is used for monitoring the triggering event of the sensing device by the touch driving chip. And, the first touch driving chip in the first touch module 51 and the second touch driving chip in the second touch module 52 are also respectively connected with a General-purpose input/output interface (GPIO) of the microcontroller 54, and are used for sending a touch detection signal to the microcontroller 54 so as to complete the control flow of the whole sensing device triggering event monitoring.
The feedback signal processing circuit 53 is configured to obtain a current oscillation frequency corresponding to a voltage difference between the current first control voltage and the current second control voltage.
In one embodiment, the feedback signal processing circuit 53 is connected to a general input/output interface of the microcontroller 54, the feedback signal processing circuit 53 inputs the current oscillation frequency to the general input/output interface, and the microcontroller 54 detects the current oscillation frequency by detecting the count of rising edges of signals received by the general input/output interface, thereby realizing accurate detection of the current oscillation frequency.
The microcontroller 54 is configured to receive a current oscillation frequency and calibrate the sensitivities of the first touch module 51 and the second touch module 52 based on the current oscillation frequency.
In one embodiment, the touch system further includes: a first touch voltage generating device 55 corresponding to the first touch module 51 and a second touch voltage generating device 56 corresponding to the second touch module 52.
The microcontroller 54 is configured to output a current first control signal to the first touch voltage generating device 55, and adjust the current first control signal according to the current first control voltage after each adjustment.
The first touch voltage generating device 55 is configured to generate a current first control voltage according to a current first control signal of the microcontroller 54.
The microcontroller 54 is further configured to output a current second control signal to the second touch voltage generating device 56, and adjust the current second control signal according to the current second control voltage after each adjustment.
The second touch voltage generating device 56 is configured to generate a current second control voltage according to a current second control signal of the microcontroller 54.
In one embodiment, the touch voltage generation device may be a digital potentiometer (Digital Potentiometer).
In one embodiment, the feedback signal processing circuit 53 specifically includes: an operational amplifier (Operational Amplifier Operational Amplifier, OPA) 531, a voltage controlled oscillator circuit (Voltage Controlled Oscillator, VCO) 532, and a Low pass filter (Low-PASS FILTER) 533.
The operational amplifier 531 is configured to obtain a voltage difference between the current first control voltage and the current second control voltage.
The voltage-controlled oscillation circuit 532 is configured to obtain a current oscillation frequency corresponding to a voltage difference between the current first control voltage and the current second control voltage.
In one embodiment, the operational amplifier 531 may also amplify the voltage difference between the current first control voltage and the current second control voltage to the effective input range of the voltage controlled oscillating circuit 532. The effective input range of the voltage-controlled oscillation circuit 532 is set based on the specific model of the voltage-controlled oscillation circuit, and is not particularly limited in this embodiment.
A low pass filter 533 for filtering the current oscillation frequency to remove noise signals.
In one implementation scenario, the adjustment of the sensitivities of the first touch module 51 and the second touch module 52 is implemented by the microcontroller 54, the first touch voltage generating device 55 corresponding to the first touch module 51, and the second touch voltage generating device 56 corresponding to the second touch module 52.
Specifically, the first touch module 51 reads the current first control voltage output by the first touch voltage generating device 55, and adjusts the sensitivity based on the current first control voltage, and specifically, the touch driving chip of the first touch module 51 adjusts the sensitivity of detecting the event received by the sensing device through the detection pulse (detection pulse) by reading the current first control voltage output by the first touch voltage generating device 55. The second touch module 52 reads the current second control voltage output by the second touch voltage generating device 56, and adjusts the sensitivity based on the current second control voltage, specifically, the touch driving chip of the second touch module 52 adjusts the sensitivity of detecting the event received by the sensing device through the detection pulse (detection pulse) by reading the current second control voltage output by the second touch voltage generating device 56.
In one implementation scenario, because of performance differences of the control touch voltage generating devices, conversion accuracy is lost in the process of analog-to-digital conversion or digital-to-analog conversion, and control voltages output by different control touch voltage generating devices for the same control signal are also different, the sensitivity of corresponding different touch modules is difficult to adjust consistently. Thus, the sensitivities of the first and second touch modules 51 and 52 are calibrated. The sensitivity calibration of the first touch module 51 and the second touch module 52 is implemented by a feedback signal processing circuit 53, a microcontroller 54, a first touch voltage generating device 55 corresponding to the first touch module 51, and a second touch voltage generating device 56 corresponding to the second touch module 52. The input end of the operational amplifier 531 in the feedback signal processing circuit 53 is connected to the output ends of the first touch voltage generating device 55 and the second touch voltage generating device 56, the output end of the operational amplifier 531 is connected to the input end of the voltage-controlled oscillating circuit 532, the output end of the voltage-controlled oscillating circuit 532 is connected to the input end of the low-pass filter 533, and the output end of the low-pass filter 533 in the feedback signal processing circuit 53 is connected to a general input/output interface of the microcontroller 54. According to the embodiment of the disclosure, the control voltages of the sensitivity of different touch modules are calibrated through the frequency negative feedback mechanism led by the feedback signal processing circuit, so that the consistency of the control voltages of the sensitivity of the touch modules is realized.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (15)
1. The sensitivity calibration method of the touch system is characterized in that the touch system comprises a first touch module and a second touch module, and the sensitivity calibration method comprises the following steps:
Acquiring a current oscillation frequency corresponding to a voltage difference between a current first control voltage and a current second control voltage; the current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module;
When the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value, adjusting the current first control voltage or the current second control voltage, and returning to the step of acquiring the current oscillation frequency;
And ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value.
2. The method of claim 1, further comprising, prior to said adjusting the current first control voltage or the current second control voltage:
And storing the current frequency difference as a historical frequency difference.
3. The method of claim 2, wherein the step of adjusting the current first control voltage or the current second control voltage comprises:
performing preliminary adjustment on the current first control voltage or the current second control voltage;
the current oscillation frequency after preliminary adjustment is obtained again;
and adjusting the current first control voltage or the current second control voltage based on a comparison result of the current frequency difference and the historical frequency difference, wherein the current frequency difference is the difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency.
4. A method according to claim 3, wherein said preliminary adjustment of the current first control voltage or the current second control voltage comprises:
Adjusting the current first control voltage or adjusting the current second control voltage;
wherein the adjustment process includes: increasing the preset basic voltage value or decreasing the preset basic voltage value.
5. The method according to claim 4, wherein in the case of increasing the current first control voltage by a preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value;
and when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
6. The method according to claim 4, wherein in the case of increasing the current second control voltage by a preset basic voltage value in the preliminary adjustment process, the step of adjusting the current first control voltage or the current second control voltage based on the comparison result of the current frequency difference and the historical frequency difference includes:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value;
And when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
7. A microcontroller, the microcontroller comprising:
The acquisition module is used for acquiring the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage; the current first control voltage is a voltage currently used for adjusting the sensitivity of the first touch module, and the current second control voltage is a voltage currently used for adjusting the sensitivity of the second touch module;
The adjusting module is used for adjusting the current first control voltage or the current second control voltage under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is larger than a preset threshold value, and returning to the step of acquiring the current oscillation frequency by the acquiring module;
and the control module is used for ending the sensitivity calibration of the touch system under the condition that the current frequency difference between the current oscillation frequency and the reference oscillation frequency is smaller than or equal to a preset threshold value.
8. The microcontroller of claim 7 wherein the microcontroller further comprises:
and the storage module is used for storing the current frequency difference as a historical frequency difference.
9. The microcontroller according to claim 8, wherein the adjustment module comprises a first adjustment unit and a second adjustment unit;
The first adjusting unit is used for primarily adjusting the current first control voltage or the current second control voltage;
The acquisition module is further used for reacquiring the current oscillation frequency after preliminary adjustment;
The second adjusting unit is configured to adjust the current first control voltage or the current second control voltage based on a comparison result of the current frequency difference and the historical frequency difference, where the current frequency difference is a difference between the current oscillation frequency after preliminary adjustment and the reference oscillation frequency.
10. The microcontroller according to claim 9, wherein the first adjustment unit is specifically configured to perform an adjustment process on the current first control voltage or to perform an adjustment process on the current second control voltage;
wherein the adjustment process includes: increasing the preset basic voltage value or decreasing the preset basic voltage value.
11. The microcontroller according to claim 10, wherein the first adjustment unit, in case the current first control voltage is increased by a preset basic voltage value during the preliminary adjustment, the second adjustment unit is adapted to:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value;
and when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current second control voltage by the voltage corresponding to the current voltage adjustment value.
12. The microcontroller according to claim 10, wherein the first adjustment unit, in case the current second control voltage is increased by a preset basic voltage value during the preliminary adjustment, is adapted to:
acquiring a current voltage adjustment value corresponding to the current frequency difference;
When the comparison result is that the current frequency difference is larger than the historical frequency difference, reducing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or increasing the current first control voltage by the voltage corresponding to the current voltage adjustment value;
And when the comparison result is that the current frequency difference is smaller than the historical frequency difference, increasing the current second control voltage by the voltage corresponding to the current voltage adjustment value, or decreasing the current first control voltage by the voltage corresponding to the current voltage adjustment value.
13. A touch system comprising a first touch module, a second touch module, a feedback signal processing circuit, and the microcontroller of any one of claims 7-12;
The feedback signal processing circuit is used for acquiring the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage;
The microcontroller is used for receiving the current oscillation frequency and calibrating the sensitivity of the first touch module and the second touch module based on the current oscillation frequency.
14. The touch system of claim 13, further comprising: a first touch voltage generating device corresponding to the first touch module and a second touch voltage generating device corresponding to the second touch module;
The microcontroller is used for outputting a current first control signal to the first touch voltage generating device and adjusting the current first control signal according to the current first control voltage after each adjustment;
the first touch voltage generation device is used for generating a current first control voltage according to a current first control signal of the microcontroller;
The microcontroller is further configured to output a current second control signal to the second touch voltage generating device, and adjust the current second control signal according to the adjusted current second control voltage each time;
The second touch voltage generation device is used for generating a current second control voltage according to a current second control signal of the microcontroller.
15. The touch system of claim 14, wherein the feedback signal processing circuit comprises: an operational amplifier, a voltage-controlled oscillation circuit and a low-pass filter;
The operational amplifier is used for acquiring the voltage difference between the current first control voltage and the current second control voltage;
The voltage-controlled oscillation circuit is used for acquiring the current oscillation frequency corresponding to the voltage difference between the current first control voltage and the current second control voltage;
The low-pass filter is used for filtering the current oscillation frequency to filter noise signals.
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| CN103633984A (en) * | 2013-12-13 | 2014-03-12 | 深圳芯邦科技股份有限公司 | Touch key chip and sensitivity calibration method thereof and electronic equipment |
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| EP2770638A1 (en) * | 2013-02-20 | 2014-08-27 | Aito Interactive Oy | Piezoelectric sensor, and an electrical appliance, an installation or a gadget comprising at least one piezoelectric sensor |
| KR102153915B1 (en) * | 2013-11-22 | 2020-09-09 | 엘지디스플레이 주식회사 | Touch Screen Display Device with Input System |
| CN105571777A (en) * | 2015-12-23 | 2016-05-11 | 努比亚技术有限公司 | Sensitivity calibration method and device, and mobile terminal |
| CN107122075B (en) * | 2017-04-27 | 2020-01-07 | 京东方科技集团股份有限公司 | Touch device driving method, touch device and touch display device |
| CN110794985A (en) * | 2019-09-24 | 2020-02-14 | 努比亚技术有限公司 | Method for adjusting touch sensitivity of screen, terminal and computer storage medium |
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| CN101751179A (en) * | 2009-12-16 | 2010-06-23 | 深圳市汇顶科技有限公司 | Method and system for automatically calibrating sensitivity of touch detection, and touch control terminal |
| CN103633984A (en) * | 2013-12-13 | 2014-03-12 | 深圳芯邦科技股份有限公司 | Touch key chip and sensitivity calibration method thereof and electronic equipment |
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