WO2019153249A1

WO2019153249A1 - Terminal device, capacitive touchscreen, and touch recognition method thereof

Info

Publication number: WO2019153249A1
Application number: PCT/CN2018/076006
Authority: WO
Inventors: 于洋; 吴玉中; 易纯洁; 王国正
Original assignee: 鹤壁天海电子信息系统有限公司
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2019-08-15

Abstract

Disclosed are a terminal device, capacitive touchscreen, and touch recognition method thereof, said touch recognition method comprising: in a rain mode, performing time-division scanning on the self-capacitance and mutual capacitance of an electrode plate, and according to the currently measured self-capacitance value and mutual capacitance value, dynamically calibrating the capacitance plane reference value so as to obtain a current capacitance plane calibration value; on the basis of the current capacitance plane calibration value, identifying a touch operation of a user according to the current self-capacitance value and the mutual capacitance value.

Description

Terminal device, capacitive touch screen and touch recognition method thereof

Technical field

The present invention relates to the field of touch screen technologies, and in particular, to a terminal device, a capacitive touch screen, and a touch recognition method thereof.

Background technique

At present, terminal devices with capacitive touch screens have been widely used in people's daily life, and improving the environmental adaptability of capacitive touch screens has become an important issue in the industry.

For the projected capacitive touch screen, the different sensing modes can be divided into a self-capacitance and a mutual capacitance. The self-capacitance is a capacitance formed by each lateral electrode and each longitudinal electrode and the ground, and the mutual capacitance is formed at a position where the lateral electrode and the longitudinal electrode intersect. Capacitance. When scanning the self-capacitance, each lateral electrode is sequentially detected, the longitudinal coordinate is determined according to the change of the capacitance before and after the touch, and then each longitudinal electrode is sequentially detected, the lateral coordinate is determined according to the change of the capacitance before and after the touch, and then combined into a planar touch coordinate. . When scanning the mutual capacitance, the excitation signal is sequentially sent to the lateral electrodes, and all the longitudinal electrodes receive the signals at the same time, so that the capacitance values at the intersections of all the lateral electrodes and the longitudinal electrodes can be obtained, and each capacitance can be calculated according to the change of the capacitance before and after the touch. The coordinates of a touch point. Since the two sensing methods are different in principle, when two touch points appear on the touch screen, if the self-capacitance scanning method is used, four coordinates can be combined, resulting in ghost points, real multi-touch, and mutual capacitance. The scanning method can solve the multi-touch problem perfectly and is widely used.

However, it has been found through experiments that when water droplets drip onto the mutual capacitance touch screen, not only the capacitive touch screen may cause false touch signals or finger touch failure, but also, when the water droplets are erased, the original touch area may also be insensitive. The water flow is more likely to cause anomalies on the touch screen. Although waterproof performance is a symbolic indicator of capacitive touch screens in many environmental adaptability indicators, waterproof performance only defines the waterproof rating of the product. Currently, there are many products with waterproof capacitive touch screens on the market, but this The products only achieved the effect of blisters and dripping, which did not solve the problem of use in the rainy environment.

For a terminal device with special use, there is a big difference between the use environment and the ordinary mobile phone. For example, for the intercom device, the user cannot make a choice in the environment during the execution of the task. As the customer community's environmental adaptability requirements for such products increase, for example, police users need to perform tasks in the rain, warriors need to communicate in the rain, so these products urgently need to improve the user experience in the rainy environment. To enable users to truly use the product in a rainy day.

technical problem

The technical problem to be solved by the present invention is that the user cannot use the capacitive touch screen in the rainy environment in the prior art.

Technical solution

The present invention provides a touch recognition method for a capacitive touch screen. The capacitive touch screen includes an electrode plate. The electrode plate is provided with a horizontal electrode array and a vertical electrode array. The touch recognition method includes:

Tolerance plane calibration step: in the rain mode, the self-capacitance and mutual capacitance of the electrode plate are time-divisionally scanned, and the capacitance plane reference value is dynamically calibrated according to the currently detected self-capacitance value and mutual capacitance value. Obtaining a current capacitance plane calibration value, wherein the capacitance plane reference value is a capacitance plane detection value obtained according to a self-capacitance value and a mutual capacitance value of the electrode plate when there is no conductor contact;

The first identifying step: identifying the user's touch operation based on the current self-capacitance value and the mutual capacitance value based on the current capacitance plane calibration value.

Preferably, before the value plane calibration step, the method further includes:

The mode judging step is: performing time-division scanning on the self-capacitance and the mutual capacitance of the electrode plate, and obtaining a current capacitance plane detection value according to the currently detected self-capacitance value and mutual capacitance value, and determining the capacitance value plane detection Whether the value meets the preset condition, and if so, enters the rain mode.

Preferably, in the mode determining step, if not, the non-raining mode is entered; and the touch recognition method further includes:

The second identifying step is: in the non-raining mode, based on the capacitance plane reference value, the user's touch operation is identified according to the current self-capacitance value and the mutual capacitance value.

Preferably, in the mode determining step, the self-capacitance and the mutual capacitance of the electrode plate are time-divisionally scanned at a first frequency;

In the capacitance plane calibration step, the self-capacitance and the mutual capacitance of the electrode plate are time-divisionally scanned at a second frequency, wherein the second frequency is higher than the first frequency.

Preferably, after the mode determining step, the method further includes:

Priority setting step: setting a priority of the self-capacitance value and the mutual capacitance value in a rain mode and a non-rain mode, wherein the self-capacitance value has a high priority in the rain mode The priority of the mutual capacitance value; in the non-rain mode, the mutual capacitance value has a higher priority than the self capacitance value;

Moreover, the user's touch operation is identified based on the current self-capacitance value and the mutual capacitance value, including:

The user's touch operation is identified based on current self-capacitance values, mutual capacitance values, and respective priorities.

Preferably, the value plane calibration step further comprises:

During each detection period, when the self-capacitance value and the mutual capacitance value of the electrode plate are time-divisionally scanned, the number of detections of the self-capacitance is made larger than the number of detections of the mutual capacitance.

The present invention also constructs a capacitive touch screen comprising a substrate and an electrode plate disposed under the substrate, the electrode plate is provided with a lateral electrode array and a longitudinal electrode array, and the capacitive touch screen further comprises an array of the lateral electrodes respectively a control module coupled to the array of longitudinal electrodes, and wherein the control module comprises:

The capacitance plane calibration unit is configured to perform time-sharing scanning on the self-capacitance and mutual capacitance of the electrode plate in the raining mode, and dynamically calculate the capacitance plane reference value according to the currently detected self-capacitance value and mutual capacitance value. Calibrating to obtain a current capacitance plane calibration value, wherein the capacitance plane reference value is a capacitance plane detection value obtained according to the self-capacitance value and the mutual capacitance value of the electrode plate when there is no conductor contact;

The first identifying unit is configured to identify a touch operation of the user according to the current self-capacitance value and the mutual capacitance value based on the current capacitance plane calibration value.

Preferably, the mode determining unit is configured to perform time-division scanning on the self-capacitance and the mutual capacitance of the electrode plate, and obtain a current capacitance value detection value according to the currently detected self-capacitance value and the mutual capacitance value, and determine the location Whether the value of the reference value plane detection meets the preset condition, and if so, enters the rain mode.

The present invention also contemplates a capacitive touch screen comprising a memory and a processor for implementing the steps of the touch recognition method as described above when executing a computer program stored in the memory.

The invention also constructs a terminal device comprising the capacitive touch screen described above.

Beneficial effect

In the rain mode, the self-capacitance and mutual capacitance of the capacitive touch screen are time-divisionally scanned, and the capacitance plane reference value is dynamically adjusted, and the user's touch operation is determined based on the adjusted capacitance plane calibration value. Even in rainy days, users can use the terminal device without barriers, improving the user experience.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work. In the figure:

1 is a flow chart of Embodiment 1 of a touch recognition method for a capacitive touch screen according to the present invention;

2A is a schematic plan view of a capacitance value when there is no user touch operation in the rain mode;

2B is a schematic plan view showing a capacitance value when a user touches a rain mode;

2C is a schematic diagram of a capacitance plane when there is a user touch operation in a non-rain mode;

3 is a flow chart of a second embodiment of a touch recognition method for a capacitive touch screen according to the present invention;

4 is a logic structural diagram of Embodiment 1 of a capacitive touch screen of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a flow chart of a first embodiment of a touch recognition method for a capacitive touch screen according to the present invention. First, the touch recognition method is applicable to a projected capacitive touch screen. The projected capacitive touch screen includes an electrode plate, and the electrode plate is provided with a horizontal electrode array. And a longitudinal electrode array. Moreover, the touch recognition method of this embodiment includes the following steps:

S11. Tolerance plane calibration step: in the rain mode, the self-capacitance and the mutual capacitance of the electrode plate are time-divisionally scanned, and the capacitance value reference value is dynamic according to the currently detected self-capacitance value and mutual capacitance value. Calibrating to obtain a current capacitance plane calibration value, wherein the capacitance plane reference value is a capacitance plane detection value obtained according to the self-capacitance value and the mutual capacitance value of the electrode plate when there is no conductor contact;

In this step, it should first be noted that the entry of the rain mode may be triggered by the user operating a specific physical button or virtual button on the terminal device, or may be triggered automatically by the system according to the current environment. It should also be noted that the capacitance plane reference value can be obtained through multiple tests before the product leaves the factory and stored in the control module. Specifically, during the test, the capacitive touch screen is in a state in which no conductor (including hand, water, etc.) is in contact, and then the mutual resistance scanning and self-capacitance scanning are performed on the electrode plates of the capacitive touch screen, and then the mutual detection is performed for multiple times. Each element in the capacitance matrix of the capacitor is subjected to fusion processing. Similarly, each element in the capacitance matrix of the self-capacitance detected for multiple times is subjected to fusion processing to obtain a reference value of the capacitance plane.

In addition, it has been found through experiments that the effect of water on self-capacitance and mutual capacitance has certain differences: self-capacitance has better anti-interference ability than mutual capacitance. In this embodiment, both the self-capacitance and the mutual-capacitance scanning modes are supported, and the two capacitors are time-divisionally scanned. At this time, the self-capacitance value (self-capacitance capacitance matrix) and mutual capacitance in each detection period can be obtained. Value (tolerance matrix of mutual capacitance), the detected capacitance matrix can be directly used as the current capacitance plane detection value, or the capacitance matrix can be processed first, for example, filtering processing, normalization processing, and mean value. Processing, etc., and then taking the processed capacitance matrix as the capacitance plane detection value. When in the rain mode, due to the water flow on the touch screen display, if the value of the capacitance plane reference value is used to judge whether a valid touch operation has occurred, the touch recognition error may occur, so it is necessary to face the error. The value plane reference value is dynamically calibrated. When calibrating, each time a value plane detection value is detected, it can be subtracted from the capacitance plane reference value to obtain the difference, and then averaged all the differences within the current period (for example, five detection periods). The value is used as the adjustment value of the current detection period. Finally, the capacitance plane detection value detected by the current detection period is added to the currently obtained adjustment value, thereby obtaining the current capacitance plane calibration value. As shown in Figure 2A. It should be noted that the process of calibrating the reference value of the capacitance plane is a process of dynamically changing in real time, so it is more responsive to the state of the current rainy environment, so that the user touch is judged based on the calibration value of the capacitance plane. When operating, it is more accurate and will not be misjudged.

S12. First identification step: based on the current capacitance plane calibration value, the user's touch operation is identified according to the current self-capacitance value and the mutual capacitance value.

In this step, after the current capacitance plane calibration value is determined, the user's touch operation can be identified based on the capacitance plane calibration value. When a user touch operation occurs, the capacitance plane is as shown in FIG. 2B. The capacitance detected at the touch position will be greater than the capacitance value in the capacitance plane calibration value.

3 is a flow chart of a second embodiment of the touch recognition method of the capacitive touch screen of the present invention. The embodiment differs from the embodiment shown in FIG. 1 only in that: step S00 and step S20 are further included, wherein step S00 is Before step S11. Steps S00 and S20 are specifically described below:

S00. Mode judging step: performing time-division scanning on the self-capacitance and mutual capacitance of the electrode plate, and obtaining a current capacitance plane detection value according to the currently detected self-capacitance value and mutual capacitance value, and determining the capacitance value Whether the plane detection value meets the preset condition, and if so, enters the rain mode; if not, enters the non-rain mode;

In this step, the two capacitors are time-divisionally scanned at a certain frequency. At this time, the self-capacitance value (self-capacitance capacitance matrix) and the mutual capacitance value (the capacitance of the mutual capacitance) in each detection period can be obtained. Matrix), the detected capacitance matrix can be directly used as the current capacitance plane detection value. Preferably, the value matrix may be processed first, for example, filtering processing, normalization processing, averaging processing, etc., and then the processed capacitance matrix is used as the capacitance plane detection value. For example, when performing the averaging process, the average value of each element in the capacitance matrix detected in the current period of time may be averaged, and the mean value matrix after the averaging process is used as the current value plane detection value.

Regarding the preset condition, it should be noted that the preset condition can be obtained through multiple tests before the product leaves the factory, and stored in the control module of the product, and the preset conditions include: a first threshold corresponding to the mutual capacitance value, and The second threshold corresponding to the capacitance value and the percentage corresponding to each threshold. In a specific implementation, the case where the preset condition is met is, for example, the current capacitance value detection value, the ratio of the number of elements in the capacitance matrix of the mutual capacitance greater than the first threshold is greater than the first percentage. (eg, 30%); and/or, the ratio of the number of elements in the capacitance matrix of the self-capacitance greater than the second threshold is greater than the second percentage (eg, 50%); and/or the capacitance of the mutual capacitance The ratio of the number of elements in the matrix whose capacitance is greater than the first threshold to the ratio of the number of elements in the capacitance matrix of the self-capacitance greater than the second threshold is greater than the third percentage (eg, 60%), etc. .

S20. Second identifying step: in the non-raining mode, based on the capacitance plane reference value, the user's touch operation is identified according to the current self-capacitance value and the mutual capacitance value.

In this step, in the non-rain mode, if the user's touch operation occurs, the capacitance plane is as shown in FIG. 2C, that is, the capacitance value detected at the touch position is larger than the capacitance value in the capacitance plane reference value.

In a preferred embodiment, in step S00, the self-capacitance and the mutual capacitance of the electrode plate are time-divisionally scanned at a first frequency; in step S11, the self-capacitance of the electrode plate is performed at a second frequency. The mutual capacitance is time-divisionally scanned, wherein the second frequency is higher than the first frequency.

In this embodiment, it should be noted that although the experiment shows that the self-capacitance has better anti-interference ability, the water droplets or water drops on the capacitive touch screen have better anti-interference ability in the static state. In a rainy environment, a water flow (flowing water droplets or water droplets) may be formed on the capacitive touch screen. Therefore, in the rain mode, the detection frequency of the self capacitance and the mutual capacitance may be increased, for example, if the first frequency For f1, the second frequency can be N*f1, and N is a natural number greater than one. By time slicing the initial detection period, the water flow is equivalent to relatively stationary water droplets or water droplets during each detection period after the slice, so that the self-capacitance detected in each detection cycle after the slice is performed. Value and mutual capacitance value are more accurate when determining the user's touch operation, reducing false positives.

In a preferred embodiment, after step S00, the following steps are further included:

S30. Priority setting step: setting a priority of the self-capacitance value and the mutual capacitance value in a rain mode and a non-rain mode respectively, wherein in the rain mode, the self-capacitance value is prioritized The level is higher than the priority of the mutual capacitance value; in the non-rain mode, the mutual capacitance value has a higher priority than the self-capacitance value;

Moreover, in step S12 and step S20, the user's touch operation is identified according to the current self-capacitance value and the mutual capacitance value, including:

In this embodiment, in the non-rain mode, since the mutual capacitance supports multi-touch, the priority of the mutual capacitance can be set to a higher value, and the priority of the self-capacitance can be set to a lower value. That is, according to the preset strategy, the user's touch operation is preferentially identified according to the mutual capacitance value; and in the rain shower mode, since the self-capacitance has better anti-interference ability, the priority of the self-capacitance can be set to a higher value, and The priority of the mutual capacitance is set to a lower value, that is, the user's touch operation is recognized according to the self-capacitance value according to the preset policy. This ensures that the user's touch operation is accurately recognized regardless of the mode.

In a preferred embodiment, step S11 further includes:

During each detection period, when the self-capacitance value and the mutual capacitance value of the electrode plate are time-divisionally scanned, the number of detections of the self-capacitance is greater than the number of detections of the mutual capacitance.

In this embodiment, in the rain mode, since the self-capacitance has better anti-interference ability, the number of times of self-capacitance detection can be increased, which is equivalent to increasing the weight value of the self-capacitance value, for example, in one detection period. The self-capacitance is detected twice, and the mutual capacitance is detected only once, which may improve the recognition accuracy of the user's touch operation.

4 is a logic structural diagram of a first embodiment of a capacitive touch screen of the present invention. The capacitive touch screen of the embodiment includes a substrate (not shown) and an electrode plate (not shown) disposed under the substrate, and the electrode plate is provided with a lateral direction. The electrode array and the longitudinal electrode array, wherein the substrate may be a glass substrate or other suitable substrate. In addition, the capacitive touch screen further includes a control module respectively connected to the horizontal electrode array and the vertical electrode array, and the control module includes a capacitance plane calibration unit 11 and a first identification unit 12, wherein the capacitance plane calibration The unit 11 is configured to perform time-division scanning on the self-capacitance and the mutual capacitance of the electrode plate in the raining mode, and dynamically calibrate the capacitance plane reference value according to the currently detected self-capacitance value and the mutual capacitance value to obtain The current value plane calibration value, wherein the capacitance plane reference value is a capacitance plane detection value obtained according to the self-capacitance value and the mutual capacitance value of the electrode plate when there is no conductor contact; the first identification unit 12 Based on the current capacitance plane calibration value, the user's touch operation is identified based on the current self-capacitance value and the mutual capacitance value.

Further, the capacitive touch screen of the present invention further includes a mode determining unit and a second identifying unit, wherein the mode determining unit is configured to perform time-division scanning on the self-capacitance and the mutual capacitance of the electrode plate, and according to the currently detected self-capacitance value. And the mutual capacitance value obtains the current capacitance plane detection value, and determines whether the capacitance plane detection value satisfies the preset condition, and if yes, enters the rain mode; if not, enters the non-rain mode. The second identifying unit is configured to identify a touch operation of the user according to the current self-capacitance value and the mutual capacitance value based on the capacitance plane reference value in the non-rain mode.

Preferably, the mode determining unit is configured to perform time-sharing scanning on the self-capacitance and the mutual capacitance of the electrode plate at a first frequency; the capacitance plane calibration unit 11 is configured to self-capacitance and mutual-to-electrode of the electrode plate at a second frequency. The capacitor performs a time division scan in which the second frequency is higher than the first frequency.

In a preferred embodiment, the control module further includes a priority setting unit, configured to set a priority of the self-capacitance value and the mutual capacitance value in a rain mode and a non-rain mode, respectively. In the rain shower mode, the self-capacitance value has a higher priority than the mutual capacitance value; in the non-rain mode, the mutual capacitance value has a higher priority than the self-capacitance value Priority. Moreover, the first identifying unit 12 is further configured to identify a touch operation of the user according to the current self-capacitance value, the mutual capacitance value, and the respective priorities based on the calibration capacitance plane. The second identifying unit is further configured to identify a touch operation of the user according to the current self-capacitance value, the mutual capacitance value, and the respective priorities based on the reference capacitance plane.

In a preferred embodiment, the first identifying unit 12 is further configured to: when the self-capacitance value and the mutual capacitance value of the electrode plate are time-divisionally scanned in each detection period, the detection times of the self-capacitance are greater than each other. The number of times the capacitor is detected.

Further, the capacitive touch screen further includes a waterproof film layer disposed on an upper surface of the substrate, such as a nano film layer.

The present invention also constructs a terminal device, including the capacitive touch screen described above, such as a walkie-talkie device, a mobile phone, and the like.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any tampering, equivalent substitution, improvement, etc., within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

A touch recognition method for a capacitive touch screen, the capacitive touch screen comprising an electrode plate, wherein the electrode plate is provided with a horizontal electrode array and a longitudinal electrode array, wherein the touch recognition method comprises:

Tolerance plane calibration step: in the rain mode, the self-capacitance and mutual capacitance of the electrode plate are time-divisionally scanned, and the capacitance plane reference value is dynamically calibrated according to the currently detected self-capacitance value and mutual capacitance value. Obtaining a current capacitance plane calibration value, wherein the capacitance plane reference value is a capacitance plane detection value obtained according to a self-capacitance value and a mutual capacitance value of the electrode plate when there is no conductor contact;

The first identifying step: identifying the user's touch operation based on the current self-capacitance value and the mutual capacitance value based on the current capacitance plane calibration value.
The touch recognition method of the capacitive touch screen according to claim 1, further comprising: before the step of the value plane calibration, further comprising:

The mode judging step is: performing time-division scanning on the self-capacitance and the mutual capacitance of the electrode plate, and obtaining a current capacitance plane detection value according to the currently detected self-capacitance value and mutual capacitance value, and determining the capacitance value plane detection Whether the value meets the preset condition, and if so, enters the rain mode.
The touch recognition method of the capacitive touch screen according to claim 2, wherein in the mode determining step, if not, the non-raining mode is entered; and the touch recognition method further comprises:

The second identifying step is: in the non-raining mode, based on the capacitance plane reference value, the user's touch operation is identified according to the current self-capacitance value and the mutual capacitance value.
The touch recognition method of a capacitive touch screen according to claim 2, wherein

In the mode determining step, the self-capacitance and the mutual capacitance of the electrode plate are time-divisionally scanned at a first frequency;

In the capacitance plane calibration step, the self-capacitance and the mutual capacitance of the electrode plate are time-divisionally scanned at a second frequency, wherein the second frequency is higher than the first frequency.
The touch recognition method of the capacitive touch screen according to claim 3, further comprising: after the mode determining step, further comprising:

Priority setting step: setting a priority of the self-capacitance value and the mutual capacitance value in a rain mode and a non-rain mode, wherein the self-capacitance value has a high priority in the rain mode The priority of the mutual capacitance value; in the non-rain mode, the mutual capacitance value has a higher priority than the self capacitance value;

Moreover, the user's touch operation is identified based on the current self-capacitance value and the mutual capacitance value, including:

The user's touch operation is identified based on current self-capacitance values, mutual capacitance values, and respective priorities.
The touch recognition method of the capacitive touch screen of claim 1 , wherein the step of the value plane calibration further comprises:

During each detection period, when the self-capacitance value and the mutual capacitance value of the electrode plate are time-divisionally scanned, the number of detections of the self-capacitance is made larger than the number of detections of the mutual capacitance.
A capacitive touch screen includes a substrate and an electrode plate disposed under the substrate, wherein the electrode plate is provided with a horizontal electrode array and a longitudinal electrode array, wherein the capacitive touch screen further comprises an array of the horizontal electrodes respectively a control module coupled to the array of longitudinal electrodes, and wherein the control module comprises:

The capacitance plane calibration unit is configured to perform time-sharing scanning on the self-capacitance and mutual capacitance of the electrode plate in the raining mode, and dynamically calculate the capacitance plane reference value according to the currently detected self-capacitance value and mutual capacitance value. Calibrating to obtain a current capacitance plane calibration value, wherein the capacitance plane reference value is a capacitance plane detection value obtained according to the self-capacitance value and the mutual capacitance value of the electrode plate when there is no conductor contact;

The first identifying unit is configured to identify a touch operation of the user according to the current self-capacitance value and the mutual capacitance value based on the current capacitance plane calibration value.
The capacitive touch screen of claim 7, further comprising:

a mode determining unit, configured to perform time-sharing scanning on the self-capacitance and the mutual capacitance of the electrode plate, and obtain a current capacitance plane detection value according to the currently detected self-capacitance value and the mutual capacitance value, and determine the capacitance value Whether the plane detection value meets the preset condition, and if so, enters the rain mode.
A capacitive touch screen comprising a memory and a processor, the processor being operative to perform the steps of the touch recognition method of any of claims 1-6 when the computer program stored in the memory is executed.
A terminal device, comprising the capacitive touch screen of any one of claims 7-9.