WO2019023941A1

WO2019023941A1 - Touch position determining method, capacitive touch device, and capacitive touch terminal

Info

Publication number: WO2019023941A1
Application number: PCT/CN2017/095483
Authority: WO
Inventors: 彭海军; 李刚; 彭永豪
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2017-08-01
Filing date: 2017-08-01
Publication date: 2019-02-07
Also published as: CN107636596A; CN107636596B

Abstract

Embodiments of the present application provide a touch position determining method, a capacitive touch device, and a capacitive touch terminal. The method comprises: collecting original sampling data outputted by a detection electrode when a capacitive touch sensor is marked; collecting noise sampling data outputted by the detection electrode when the capacitive touch sensor is not marked; and determining the touch position of a touch object on the capacitive touch sensor according to the original sampling data and the noise sampling data outputted by the detection electrode when the capacitive touch sensor is marked and not marked. The touch position is determined in combination with the noise sampling data and the original sampling data, thereby improving the accuracy of the touch position.

Description

Method for determining touch position, capacitive touch device and capacitive touch terminal

Technical field

The embodiments of the present invention relate to the field of touch technologies, and in particular, to a method for determining a touch position, a capacitive touch device, and a capacitive touch terminal.

Background technique

Since the capacitive touch sensor can directly implement touch control based on the influence of the human body on the electric field, the capacitive touch sensor has been widely used in smart terminals.

In order to ensure the accuracy of the touch, when the touch object touches the capacitive touch sensor, the pressure difference between the reference ground of the capacitive touch sensor and the ground corresponding to the finger should be stabilized. However, since the pressure difference between the reference ground and the earth will change irregularly in practice, and the contact between the touch object and the capacitive touch sensor will form a common mode loop, common mode noise is introduced into the capacitive touch sensor. , greatly affect the accuracy of the touch position.

In the application of the smart terminal, in addition to the capacitive touch sensor, a capacitive touch device is disposed. The capacitive touch sensor includes a sensing electrode, and the capacitive touch device determines the touch position according to the data of the output of the collected sensing electrode. 1 is a schematic diagram of the principle when the capacitive touch sensor does not have common mode noise, and FIG. 2A is a schematic diagram of the principle of the common touch noise of the capacitive touch sensor. In FIG. 1 and FIG. 2A , taking the mutual capacitance detection as an example, the driving electrode Tx is loaded with a coding signal, and the coding signal is coupled to the sensing electrode through mutual capacitance of the capacitive touch sensor, and the sensing electrode Rx outputs the original sampling data. As shown in FIG. 1 , when there is no common mode noise in the capacitive touch sensor, the original sampled data output by the sensing electrode Rx does not have noise sampling data; in FIG. 2A, Che represents the capacitance between the human body and the earth, and Chd represents the human body and The capacitance between the driving electrodes, Chs represents the capacitance between the human body and the sensing electrode, Cdg represents the capacitance between the driving electrode and the reference ground, Csg represents the capacitance between the sensing electrode and the reference ground, Vs represents the loaded coding signal, and Vcm represents the introduction. The common mode noise, Ncm represents the coupled common mode signal, and Cds represents the capacitance between the driving electrode and the sensing electrode, wherein the left substrate of the capacitor Cds is the driving electrode Tx, and the right substrate of the capacitor Cds is the sensing electrode Rx; As shown in FIG. 2A, when the differential pressure between the reference ground and the ground changes irregularly, and the touch object touches (that is, when there is human touch in the figure), the common touch mode is introduced into the capacitive touch sensor. Fig. 2B is a diagram showing an example of a waveform of a common mode noise, Fig. 2C is a diagram showing an example of a waveform of a coded signal, and Fig. 2D is a diagram showing an example of a waveform of original sample data outputted by the induction electrode of Fig. 2A, and Fig. 2A The dashed line with an arrow indicates the common mode loop formed by the touch object touching the capacitive touch sensor. The introduction of common mode noise causes the original sample number of the sensing electrode Rx to be output. According to the impact, it can be seen that compared with the original sampled data when there is no common mode noise in Fig. 1, the statistical waveform of the original sampled data in the presence of common mode noise in Fig. 2D will have different degrees of burrs, further causing capacitive touch. The control device cannot accurately determine the actual touch position, and finally the phenomenon of touch failure, such as occurrence of a dot phenomenon and a phenomenon of elimination, seriously affects the performance of the capacitive touch screen system. For example, when the touch position determined according to the original sample data includes not only all the true touch positions, but also other non-real touch positions generated by common mode noise, it may be considered that a dot phenomenon occurs. The non-real touch position generated by the mode noise is called a dangling point; for example, when the touch position determined according to the original sample data includes only part of the real touch position, there is still no recognition due to the influence of common mode noise. The actual touch position can be considered as a phenomenon of elimination, and these unidentified real touch positions can be called elimination points.

In addition, common mode noise sources are widely available, such as chargers, white noise, impulse noise, sweep signals introduced when testing capacitive touch resistance against common mode noise, etc. The frequency range of common mode noise from different sources is The frequency range of the coded signal is different, which causes the common mode noise of different sources to have different effects on the same type of capacitive touch sensor and capacitive touch device. For example, when determining the true touch position, the position of the point and the point of elimination are determined. And / or the number is different. Furthermore, the common mode noise of the same source has different effects on different types of capacitive touch sensors and capacitive touch devices, such as the position and/or the number of points and vanishing points.

In summary, how to effectively deal with the common mode noise to improve the accuracy of determining the true touch position, and improving the performance of the capacitive touch has become a technical problem that needs to be solved in the prior art.

Summary of the invention

An object of the present application is to provide a method for determining a touch position, a capacitive touch device, and a capacitive touch terminal for solving at least the above problems in the prior art.

For the purpose of implementing the embodiments of the present application, the embodiment of the present application provides a method for determining a touch location, which includes:

The collecting capacitive touch sensor passes the raw sampling data outputted by the detecting electrode when being coded, and collects the noise sampling data output by the detecting electrode when the capacitive touch sensor is not coded;

The touch position of the touch object on the capacitive touch sensor is determined according to the raw sampling data and the noise sampling data output by the detecting electrode when the capacitive touch sensor is coded, when the code is not being coded.

Optionally, in any embodiment of the present application, the capacitive touch sensor is a mutual capacitive touch sensor, the mutual capacitive touch sensor includes a driving electrode for loading a coded signal, and is configured to output the The sensing electrode of the original sampling data, the raw sampling data output by the detecting electrode when the collecting capacitive touch sensor is being coded includes: Collecting the original sample data output by the sensing electrode in the mutual capacitive touch sensor.

Optionally, in any embodiment of the present application, the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coded signal through the detection electrode and passes through the detection electrode. Outputting the original sampling data, the raw sampling data output by the detecting capacitive touch sensor when detecting the output by the detecting electrode includes: collecting the original sampling data output by the detecting electrode in the self-capacitive touch sensor .

Optionally, in any embodiment of the present application, the capacitive touch sensor is a mutual capacitive touch sensor, the mutual capacitive touch sensor includes a driving electrode for loading a coded signal, and is configured to output the The sensing sampling data of the original sampling data, the collecting the noise sampling data of the capacitive touch sensor through the detecting electrode when not being encoded includes:

Collecting noise sampling data output by the sensing electrode when the driving electrode does not load the coding signal; and collecting noise sampling data output by the driving electrode when the sensing electrode does not load the coding signal.

Optionally, in any embodiment of the present application, the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coded signal through the detection electrode and passes through the detection electrode. Outputting the original sampling data, the collecting the noise sampling data of the capacitive touch sensor through the detecting electrode when not being encoded includes: collecting the detecting electrode output when the detecting electrode does not load the writing signal The noise samples data.

Optionally, in any embodiment of the present application, the capacitive touch sensor determines the touch object by using the original sampling data and the noise sampling data output by the detecting electrode when the coded sensor is not coded. The touch positions on the capacitive touch sensor include:

And determining, according to the verification result that the original sampling data is verified by the noise sampling data, determining a touch position of the touch object on the capacitive touch sensor.

Optionally, in any embodiment of the present application, the verifying the original sample data according to the noise sampling data includes:

Verifying the original sampled data based on the valid noise sample data to determine whether the original sample data is available;

If available, determining a touch position of the touch object on the capacitive touch sensor according to the noise sampling data and the original sampling data.

Optionally, in any embodiment of the present application, determining, according to the noise sampling data and the original sampling data, a touch location of the touch object on the capacitive touch sensor includes:

Determining a touch area according to the original sample data;

And filtering, according to the noise sampling data, an unreal touch position in the touch area to determine a touch position of the touch object on the capacitive touch sensor.

Filtering the original sample data according to the noise sampling data;

And determining, according to the filtered original sampling data, a touch position of the touch object on the capacitive touch sensor.

Optionally, in any embodiment of the present application, filtering the original sampling data according to the noise sampling data includes: determining, according to the noise sampling data, the touch object on the capacitive touch sensor The noise region formed during touch is filtered according to the noise region.

Optionally, in any embodiment of the present application, when the capacitive touch sensor is a mutual-capacitive touch sensor, determining, according to the noise sampling data, that the touch object touches the capacitive touch sensor The noise area formed at the time includes:

Determining a first coordinate according to the noise sampling data output by the sensing electrode when the driving electrode does not load the coding signal, and determining a noise region formed when the touch object touches the capacitive touch sensor according to the first coordinate; and/or ,

The second coordinate is determined according to the noise sampling data output by the driving electrode when the sensing electrode is not loaded with the coding signal, and the noise region formed when the touch object touches the capacitive touch sensor is determined according to the second coordinate.

Optionally, in any embodiment of the present application, if the original sampling data is not available, determining, according to the noise sampling data, a touch position of the touch object on the capacitive touch sensor.

For the purpose of implementing the embodiments of the present application, the embodiment of the present application provides a capacitive touch device, which is used for collecting raw sampling data output by a capacitive touch sensor through a detection electrode thereof when being coded. And collecting the noise sampling data output by the capacitive touch sensor through the detecting electrode when the coded touch sensor is not being coded; and the original sampling output through the detecting electrode when the capacitive touch sensor is not coded, respectively, according to the capacitive touch sensor The data and the noise sampling data determine a touch position of the touch object on the capacitive touch sensor.

Optionally, in any embodiment of the present application, the capacitive touch sensor is a mutual capacitive touch sensor, the mutual capacitive touch sensor includes a driving electrode for loading a coded signal, and is configured to output the The sensing electrode of the original sampled data, the capacitive touch device is further used to:

Optionally, in any embodiment of the present application, the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coded signal through the detection electrode and passes through the detection electrode. And outputting the original sampling data, the capacitive touch device is further configured to: when the detecting electrode does not load the coded signal, collect the noise sampling data output by the detecting electrode.

Optionally, in any embodiment of the present application, the capacitive touch device is further configured to:

Determining a touch area according to the original sample data;

Filtering the original sample data according to the noise sampling data;

Optionally, in any embodiment of the present application, the capacitive touch device is further configured to: determine, according to the noise sampling data, noise formed when the touch object touches the capacitive touch sensor And filtering the original sampled data according to the noise region.

Optionally, in any embodiment of the present application, when the capacitive touch sensor is a mutual capacitive touch sensor, the capacitive touch device is further configured to:

Optionally, in any embodiment of the present application, the capacitive touch device is further configured to: if the original sampling data is not available, determine, according to the noise sampling data, the touch object in the capacitor The touch position on the touch sensor.

For the purpose of implementing the embodiments of the present application, the embodiment of the present application provides a capacitive touch terminal, including: a capacitive touch sensor and a capacitive touch device according to any one of the embodiments of the present application, the capacitive touch sensor The detecting electrode is electrically connected to the capacitive touch device.

The embodiment of the present application provides a method for determining a touch position, a capacitive touch device, and a capacitive touch terminal. The collected capacitive touch sensor detects raw sample data output by the electrode when being coded, and collects the capacitor. The touch sensor passes the noise sampling data output by the detecting electrode when it is not coded; according to the capacitive touch sensor, when the coded sensor is not coded, the raw sample data and the noise sample data output by the detecting electrode are determined when the code is not coded, respectively. The touch position of the control object on the capacitive touch sensor determines the touch position by using the noise sampling data combined with the original sample data, thereby improving the accuracy of the touch position.

DRAWINGS

FIG. 1 is a schematic diagram of a principle when a capacitive touch sensor does not have common mode noise;

2A is a schematic diagram of a principle when a capacitive touch sensor has common mode noise;

2B is a diagram showing an example of a waveform of common mode noise;

2C is a diagram showing an example of a waveform of a coded signal;

2D is a diagram showing an example of waveforms of original sample data outputted by the sensing electrodes in FIG. 2A;

FIG. 3 is a schematic flowchart of a method for determining a touch position according to an embodiment of the present disclosure;

4 is a schematic diagram of a sampling principle when a mutual-capacity touch sensor does not have common mode noise;

5 is a schematic diagram of a sampling principle when a mutual-capacity touch sensor has common mode noise;

6A is a schematic diagram of a sampling principle when a capacitive touch sensor is not coded when there is common mode noise;

6B is a waveform diagram of noise sampling data outputted by the sensing electrode of FIG. 6A;

7 is a schematic diagram of sampling results when a mutual-capacity touch sensor is not coded when there is common mode noise;

FIG. 8 is a schematic diagram showing another sampling result when the mutual-capacity touch sensor is not coded when there is common mode noise;

9 is a schematic diagram of noise sampling results when there is no common mode noise in the capacitive touch sensor;

10 is a schematic diagram showing the principle of determining noise coordinates based on noise sampling data;

FIG. 11 is a flowchart of a method for determining a touch position according to another embodiment of the present application;

FIG. 12 is a schematic diagram of a sampling principle when the self-capacitive touch sensor does not have common mode noise.

Detailed ways

The embodiments of the present application will be described in detail below with reference to the drawings and embodiments, so that the application of the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

An embodiment of the present application uses a mutual-capacitive touch sensor as an example to describe a method for determining a touch position provided by the present application. Specifically, FIG. 3 is a schematic flowchart of a method for determining a touch location according to an embodiment of the present disclosure, which includes:

S11. The acquisition mutual-capacitive touch sensor passes the original sampling data output by the detection electrode when being coded;

In this embodiment, the driving electrode and the sensing electrode of the mutual capacitive touch sensor may be an elongated electrode or a prismatic electrode, and the driving electrode and the sensing electrode are arranged in two layers, and the driving electrodes of the upper layer are arranged along the longitudinal direction, and the lower layer is arranged. The sensing electrodes are arranged along the lateral direction, and the detecting capacitors are present between the nodes where the upper and lower electrodes meet. The driving electrodes and the sensing electrodes may also be the same layer bridge structure or other available electrode structures, which is not limited in this application. When the mutual capacitive touch sensor is coded, the driving electrode loads the coding signal, and the detection capacitor couples the signal to the sensing electrode, and the sensing electrode outputs the original sampling data for acquisition.

The principle of the original sampled data outputted by the sensing electrode when the coded touch sensor is encoded in the present embodiment may be as shown in FIG. 4 and FIG. 5, and FIG. 4 shows that there is no common mode in the mutual capacitive touch sensor. Schematic diagram of the sampling principle in the case of noise, FIG. 5 is a schematic diagram of the sampling principle of the common mode noise in the mutual capacitive touch sensor; FIG. 4 and FIG. 5 include a plurality of driving electrodes Tx, and a plurality of sensing electrodes Rx, mutual capacitive touch The sensor may load a coded signal through a longitudinal electrode Tx as a drive electrode, and collect an output of the mutual-capacity touch sensor as raw sample data output by the lateral electrode Rx of the sense electrode.

When there is no common mode noise in the mutual capacitive touch sensor, as shown in FIG. 4, after the original sampling data output by the sensing electrode is collected, the touch position of the touch object on the mutual capacitive touch sensor can be directly determined according to the original sampling data. It is the position of the solid circle in Figure 4.

When there is common mode noise in the mutual-capacity touch sensor, when there is a finger touch, a common mode loop is formed by the sensing electrode of the detecting capacitance at the real touch position, so that the sensing electrode meets each driving electrode. The common mode noise is coupled to the detection capacitor at the point, so that the non-real touch position is a point of occurrence, and the touch position cannot be accurately determined according to the original sampled data.

Specifically, in FIG. 5, the solid touch circle corresponds to the real touch position, and the real touch position has two non-real touch positions indicated by the dotted circle. If there are three sensing electrodes arranged along the lateral direction, and three driving electrodes arranged along the longitudinal direction, the real touch position is located at the intersection of the second driving electrode and the first sensing electrode, because the first sensing electrode passes through A common mode loop is formed. For this purpose, the touch area of the three touch positions is included, that is, the intersection of the second driving electrode and the first sensing electrode is a real touch position, and the first driving electrode is The intersection of the first sensing electrode is a non-real touch position, and the intersection of the third driving electrode and the first sensing electrode is also an unreal touch position.

S12. Acquire the noise sampling data output by the detecting electrode when the mutual capacitive touch sensor is not coded.

In addition, in this embodiment, the method for collecting the noise sampling data output by the detecting electrode when the capacitive touch sensor is not coded may be specifically as shown in FIG. 6A (the label in FIG. 6A and the label in FIG. 2A). The meaning is the same), when the capacitive touch sensor is not loaded with the coding signal (ie, there is no Vs in FIG. 6A compared with FIG. 2), the driving electrode Tx is connected to the reference ground, and the finger is connected to the ground due to the driving electrode. The coding signal is not loaded, the common mode noise is coupled to the sensing electrode through a capacitance formed between the finger and the sensing electrode, and the sensing electrode Rx outputs noise sampling data. FIG. 6B is a waveform diagram of the noise sampling data outputted by the sensing electrode in FIG. 6A. FIG. 7 corresponds to the noise sampling data diagram of FIG. 6A, and the data corresponding to the signal envelope at the bottom of FIG. 7 is the noise sampling data output by the sensing electrode Rx. The solid black circle indicates the true touch position, and the noise sampling data corresponds to a whole sensing electrode where the rectangular dotted frame area in FIG. 6A is located.

In the conversion coding direction, the driving electrode Tx in the original picture 6A is used as the sensing electrode Rx', and the sensing electrode Rx in the original picture 6A is used as the driving electrode Tx', and the driving electrode Tx' in the capacitive touch sensor is not loaded. The code signal, that is, the driving electrode Tx' is connected to the reference ground. Since the coding signal is not loaded on the driving electrode Tx', the common mode noise is coupled to the sensing electrode Rx' through the capacitance formed between the finger and the sensing electrode Rx'. The electrode Rx' outputs noise sampling data. FIG. 8 corresponds to the noise sampling data after the conversion coding direction in FIG. 6A, and the data corresponding to the signal envelope on the right side of FIG. 8 is the noise sampling data output by the sensing electrode Rx′. The solid black circle in FIG. 8 represents the real touch position, and the noise sampling data corresponds to a whole sensing electrode where the rectangular dotted frame area in FIG. 8 is located.

In addition, in this embodiment, if the mutual-capacitive touch sensor can be driven by the driving method of the self-capacitive touch sensor, when the noise sampling data of the mutual-capacitive touch sensor is collected, the coding direction can be directly converted and detected. Noise sampling data output by electrodes Tx and Rx. For a specific method for directly collecting the noise sampling data outputted by the detecting electrodes Tx and Rx, refer to the following embodiments.

Referring to FIG. 9, when there is a finger touch but there is no common mode noise, if the coding signal is not loaded to the driving electrode, the noise sampling data output by the sensing electrode does not have a corresponding common mode noise envelope, and the above FIG. The noise sampled data outputted in Figure 8 has a corresponding common mode noise envelope.

S13. Determine, according to the mutual-capacitive touch sensor, the touch position of the touch object on the mutual-capacitive touch sensor by using the original sample data and the noise sample data output by the detection electrode when the code is being coded, and when the code is not coded. .

In this embodiment, when the step S13 is performed, the touch location of the touch object on the mutual capacitive touch sensor may be determined according to the verification result of the original sample data being verified by the noise sampling data.

At the time of verification, whether the noise sampling data is valid is determined by whether the noise sampling data has a signal envelope, and if the noise sampling data is invalid, the touch position is accurately determined according to the original sampling data.

If the noise sampling data is valid, the original sampling data may be verified according to the valid noise sampling data to determine whether the original sampling data is available, and if available, according to the noise sampling data and the The original sampled data determines a touch position of the touch object on the mutual capacitive touch sensor.

In this embodiment, determining whether the noise sampling data is valid by whether there is a signal envelope may be: if the noise sampling data can determine the signal envelope, determining that the noise sampling data is valid; otherwise, determining that the noise sampling data is invalid.

In this embodiment, when the noise sampling data is valid, it is also necessary to determine whether the original sampling data is available. Specifically, whether the original sampling data is available or not can be determined according to the noise sampling data. Specifically, the following is an example of how to determine whether the original sample data is available according to the noise sample data.

In this embodiment, determining whether the original sample data is available according to the noise sampling data specifically includes:

The first coordinate is determined according to the noise sampling data output by the sensing electrode when the driving electrode is not loaded with the coding signal. In the embodiment, since the driving electrode is longitudinally arranged, the first coordinate herein refers to the ordinate.

The second coordinate is determined according to the noise sampling data output by the driving electrode when the sensing electrode is not loaded with the coding signal. In the embodiment, since the sensing electrode is laterally arranged, the second coordinate herein refers to the abscissa.

The following is a description of how the original sampled data is available based on how the noise sample data is specifically determined in conjunction with FIG.

Referring to FIG. 10, a noise region is determined according to the first coordinate (ordinate) and the second coordinate (abscissa). If the touch region determined according to the original sample data also includes a noise region, the original sample data is available; otherwise, Raw sample data is not available.

If the original sampling data is not available, the touch position of the touch object on the mutual capacitive touch sensor may be determined according to the noise sampling data.

If the original sampling data is available, the touch position of the touch object on the mutual capacitive touch sensor may be determined according to the noise sampling data and the original sampling data. Since the common mode noise signal has no fixed law, the noise sampling data signal has large jitter. However, since the coding signal is regular, the original sampling data has no jitter, or the jitter is small, so the original sampling data and the noise sampling data are passed. The touch position determined together is highly accurate.

Specifically, in this embodiment, if the original sampling data is available, the touch area may be determined according to the original sampling data, and then the common mode noise is filtered out according to the noise sampling data. The non-realistic touch position is generated to determine a touch position of the touch object on the mutual capacitive touch sensor.

In another implementation of the embodiment of the present application, the original sampling data may be filtered according to the noise sampling data; and the touch object is determined to be in the mutual capacitive touch according to the filtered original sampling data. The touch location on the sensor.

Specifically, the filtering the original sampling data according to the noise sampling data includes: determining, according to the noise sampling data, a noise region formed when the touch object touches the mutual capacitive touch sensor, according to the The noise region filters the original sampled data.

Specifically, the first coordinate is determined according to the noise sampling data output by the sensing electrode when the driving electrode is not loaded with the coding signal, and the touch object is determined to be touched on the mutual capacitive touch sensor according to the first coordinate. And forming a second coordinate according to the noise sampling data output by the driving electrode when the sensing electrode is not loaded with the coding signal, and determining, according to the second coordinate, the touch object in the mutual The noise area formed when the touch sensor is touched.

The determination of the noise region based on the first coordinate and/or the second coordinate will be exemplified below with reference to FIGS. 7, 8, and 10.

Referring to FIG. 7, when the driving electrode Tx is longitudinally arranged, the coordinate range that can be determined according to the sensing electrode Rx is R0-Rn, and if the first coordinate determined by the driving electrode Tx is not loaded with the coding signal, that is, the ordinate Rb, is located. The area where the sensing electrode Rx on the ordinate is located is a noise area, as shown by a rectangular dotted line in FIG. 7;

Correspondingly, filtering the original sample data according to the noise region may be specifically: filtering out the original sample data whose ordinate is not Rb, and determining the touch according to the filtered original sample data. The touch position of the object on the mutual capacitive touch sensor.

Similarly, referring to FIG. 8, if the driving electrode Tx' is laterally arranged, the coordinate range that can be determined according to the sensing electrode Rx' is R0'-Rn', and the second coordinate determined when the driving signal Tx' is not loaded with the coding signal is The abscissa Ra', the area where the sensing electrode Rx' located on the abscissa is located is a noise area, as shown by the rectangular dotted line frame in FIG.

Correspondingly, filtering the original sample data according to the noise region may be specifically: filtering out original sample data whose abscissa is not Ra'.

In addition, the noise region shown in FIG. 10 can also be determined together with FIG. 7 and FIG. 8. R0-Rn in FIG. 10 can be equivalent to R0-Rn in FIG. 7, and T0-Tn in FIG. 10 can be used. Corresponding to R0'-Rn' in FIG. 8, the dotted circle above Ta indicates the abscissa position of the determined touch area (corresponding to Ra' above), and the dotted circle on the left side of Rb indicates the determined touch area. The ordinate position, the noise region determined together with FIG. 7 and FIG. 8 is located at (Ta, Rb), and the determined noise region is relatively accurate with respect to the manner shown in FIG. 7 or FIG. 8 alone.

Correspondingly, filtering the original sampling data according to the noise region may be specifically: filtering out original sampling data whose abscissa is not Ta and whose ordinate is not Rb, and then filtering the original sampling according to the filtering The data determines a touch position of the touch object on the mutual capacitive touch sensor.

Another embodiment of the present application uses a self-capacitive touch sensor as an example to describe a method for determining a touch position.

Specifically, FIG. 11 is a flowchart of a method for determining a touch location according to another embodiment of the present disclosure, which includes:

S21. The self-capacitive touch sensor collects raw sampling data output by the detecting electrode when being coded;

The detecting electrode of the self-capacitive touch sensor may be a long strip electrode or a square electrode. When the self-capacitive touch sensor is coded, the detecting electrode loads the coded signal, and simultaneously outputs the original sampled data for acquisition.

Compared with the mutual-capacitive touch sensor, the coded signal is loaded by the driving electrode, and the original sampled data is outputted by the sensing electrode. The self-capacitive touch sensor provided by the embodiment not only loads the coded signal through the detecting electrode, but also outputs the original sample through the detecting electrode. The data, that is, the detecting electrode serves as both the driving electrode and the sensing electrode.

Therefore, when the self-capacitive touch sensor outputs the original sampling data through the sensing electrode when the coded self-capacitive touch sensor is being coded, the self-capacitive touch sensor directly collects the detection signal after loading the coded signal through the detecting electrodes Tx and Rx. The electrodes Tx and Rx output the original sample data.

S22. Acquire the noise sampling data output by the self-capacitive touch sensor through the detection electrode when not being coded.

In this embodiment, the collecting the noise sampling data of the capacitive touch sensor through the detecting electrode when the detecting touch sensor is not coded is specifically: the detecting the output of the detecting electrode when the detecting electrode does not load the coding signal Noise sampling data.

Compared with the mutual-capacitive touch sensor, the detecting electrode of the self-capacitive touch sensor provided by the embodiment is simultaneously used as the driving power In the embodiment, when the noise sampling data is collected, as shown in FIG. 12, when the self-capacitive touch sensor does not load the coding signal through the detection electrode, the detection electrodes Tx and Rx are directly collected. Output noise sample data. In FIG. 12, the signal envelope on the left side represents the noise sample data output by the acquired detection electrode Rx, the solid line frame on the left side represents the ordinate of the determined noise region, and the solid circle on the left side represents the determination based on the original sample data. The ordinate of the touch position, the signal envelope above indicates the noise sample data output by the detected detection electrode Tx, the upper solid line frame indicates the abscissa of the determined noise region, and the upper solid circle indicates the determination based on the original sample data. The abscissa of the touch position.

The self-capacitive touch sensor is similar to the common mode noise generation principle of the mutual capacitive touch sensor. However, the mutual-capacitive touch sensor directly determines the touch position by determining the point at which the sensing electrode and the driving electrode meet. When there is a finger touch, the detection of the point where the sensing electrode corresponding to the real touch position meets with each of the driving electrodes is detected. The common mode noise is coupled to the capacitor, so that the touch position determined according to the original sample data outputted by the detection electrode after the common mode noise is affected includes the unreal touch position generated by the common mode noise. The self-capacitive touch sensor indirectly determines the touch position by determining the horizontal and vertical coordinates of the touch area by the detection electrodes Rx and Tx arranged in the horizontal direction and the vertical direction, and the self-capacitive touch sensor is determined when the touch position is determined. Each of the detecting electrodes is independent and does not generate a junction with other detecting electrodes, so that the touch position determined according to the original sampling data of the detecting electrode output after being affected by the common mode noise does not include the non-common noise generated by the common mode noise. The real touch position.

S23. Determine, according to the self-capacitive touch sensor, the touch position of the touch object on the self-capacitive touch sensor, by using the original sample data and the noise sample data output by the detection electrode when the code is not coded. .

This step is similar to the step S13 in the above embodiment. The difference from the above steps is that since the self-capacitive touch sensor does not appear to be a point, the touch area determined according to the original sample data must not include the unreal touch. Control area, at this time, it is no longer necessary to filter the original sample data, and directly determine the touch coordinates according to the original sample data and the original sample data. For example, if the touch position determined according to the original sample data includes two points A and B, and the noise area determined according to the noise sample data includes three points A, B, and C, it can be determined that the C point also belongs to the real touch position. , point C can be called elimination point.

Another embodiment of the present application provides a capacitive touch sensor for collecting raw sampling data of a capacitive touch sensor through its detection electrode when being coded, and collecting the capacitive touch sensor. Noise sampling data outputted by the detecting electrode when not being coded; and determining the touch by the raw sampling data and the noise sampling data output by the detecting electrode when the capacitive touch sensor is coded, when not being coded, respectively The touch position of the control object on the capacitive touch sensor may be a touch chip.

Specifically, the capacitive touch sensor is a mutual capacitive touch sensor, and the mutual capacitive touch sensor includes a driving electrode for loading a coding signal and a sensing electrode for outputting the original sampling data, where the capacitance The touch device is further configured to: collect the noise sampling data output by the sensing electrode when the driving electrode does not load the coded signal; and collect the noise sampling data output by the driving electrode when the sensing electrode does not load the coded signal; .

Specifically, the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coded signal through the detection electrode, and outputs the original sample data through the detection electrode, and the capacitor The touch device is further configured to: collect the noise sampling data output by the detecting electrode when the detecting electrode does not load the coded signal.

Specifically, the capacitive touch device is further configured to: determine, according to the verification result that the original sampling data is verified by the noise sampling data, a touch position of the touch object on the capacitive touch sensor.

Specifically, the capacitive touch device is further configured to: verify, according to the valid noise sampling data, the original sampling data to determine whether the original sampling data is available; if available, according to the noise sampling The data and the original sample data determine a touch position of the touch object on the capacitive touch sensor.

Specifically, the capacitive touch device is further configured to: determine a touch area according to the original sample data; and filter out an unreal touch position in the touch area according to the noise sample data, Determining a touch position of the touch object on the capacitive touch sensor.

Specifically, the capacitive touch device is further configured to: filter the original sampling data according to the noise sampling data; and determine, according to the filtered original sampling data, the touch object in the capacitive touch sensor The touch position on the top.

Specifically, the capacitive touch device is further configured to: determine, according to the noise sampling data, a noise region formed when the touch object touches the capacitive touch sensor, and use the noise region to the original Sampling data for filtering.

Specifically, the capacitive touch device is further configured to: determine, according to the noise sampling data output by the sensing electrode, when the driving electrode does not load the coding signal, determine the first coordinate, and determine, according to the first coordinate, the touch object in the a noise region formed on the capacitive touch sensor when touched; and/or determining a second coordinate according to the noise sampling data output by the driving electrode when the sensing electrode is not loaded with the coding signal, and determining the second coordinate according to the second coordinate A noise area formed when the touch object touches the capacitive touch sensor.

Specifically, the capacitive touch device is further configured to: determine, according to the noise sampling data, a touch position of the touch object on the capacitive touch sensor, if the original sampling data is not available.

An embodiment of the present invention provides a capacitive touch terminal, comprising: a capacitive touch sensor, and the capacitive touch device of any one of the above embodiments, the detecting electrode of the capacitive touch sensor and the capacitive touch device Electrical connection.

It should be noted that, in the embodiment of the present application, only the original sampling data output by the detecting electrode when the collecting capacitive touch sensor is being coded, and the collecting of the capacitive touch sensor passing the detecting electrode when not being coded are used. The output noise sampling data is exemplified in succession, but the order of acquiring the original sampling data and the noise sampling data is not limited. Secondly, in the embodiment of the present application, only the method for confirming whether the noise sampling data is valid and confirming whether the original sampling data is available is exemplified, and is not limited to the present application, and other persons that can be determined by those skilled in the art according to the above description. Methods are also within the scope of this application. Finally, any one or more of Ta, Ra, and Rb in the embodiment of the present application may be a specific coordinate value, or may be a coordinate range, and may also represent different ranges in different embodiments, Ta Ra, Rb are for illustrative purposes only and are not intended to be limiting of the application.

In addition, those skilled in the art should be able to understand that the foregoing unit and module division manners are only one of a plurality of division manners. If the division into other units or modules or not divisions, as long as the information object has the above functions, it should be Within the scope of protection of this application.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, apparatus (device), or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of a method, apparatus, and computer program product according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that the computer Or performing a series of operational steps on other programmable devices to produce computer-implemented processing such that instructions executed on a computer or other programmable device are provided for implementing a block in a flow or a flow and/or block diagram of the flowchart Or the steps of the function specified in multiple boxes.

While the preferred embodiment of the present application has been described, those skilled in the art can make further changes and modifications to these embodiments once they are aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

A method for determining a touch position, comprising:

The collecting capacitive touch sensor passes the raw sampling data outputted by the detecting electrode when being coded, and collects the noise sampling data output by the detecting electrode when the capacitive touch sensor is not coded;

The touch position of the touch object on the capacitive touch sensor is determined according to the raw sampling data and the noise sampling data output by the detecting electrode when the capacitive touch sensor is coded, when the code is not being coded.
The method of claim 1 , wherein the capacitive touch sensor is a mutual capacitive touch sensor, the mutual capacitive touch sensor comprises a driving electrode for loading a coding signal and for outputting the original The sensing electrode of the sampling data, the raw sampling data output by the detecting electrode when the collecting capacitive touch sensor is encoded, includes: collecting the original sampling data output by the sensing electrode in the mutual capacitive touch sensor.
The method of claim 1 , wherein the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coding signal through the detection electrode and outputs the detection electrode through the detection electrode. The original sampling data, the raw sampling data output by the detecting electrode when the collecting capacitive touch sensor is encoded, includes: collecting the original sampling data output by the detecting electrode in the self-capacitive touch sensor.
The method of claim 1 , wherein the capacitive touch sensor is a mutual capacitive touch sensor, the mutual capacitive touch sensor comprises a driving electrode for loading a coding signal and for outputting the original The sensing electrode of the sampling data, wherein the collecting the noise sampling data of the capacitive touch sensor through the detecting electrode when not being encoded includes:

Collecting noise sampling data output by the sensing electrode when the driving electrode does not load the coding signal; and collecting noise sampling data output by the driving electrode when the sensing electrode does not load the coding signal.
The method of claim 1 , wherein the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coding signal through the detection electrode and outputs the detection electrode through the detection electrode. The raw sampling data, the collecting the noise sampling data of the capacitive touch sensor through the detecting electrode when not being encoded includes: collecting the detecting electrode output when the detecting electrode does not load the coding signal Noise sampling data.
The method according to claim 1, wherein the capacitive touch sensor determines that the touch object is in the original sampling data and the noise sampling data outputted by the detecting electrode when the coded sensor is not coded. The touch positions on the capacitive touch sensor include:

And determining, according to the verification result that the original sampling data is verified by the noise sampling data, determining a touch position of the touch object on the capacitive touch sensor.
The method of claim 6 wherein said said said said The verification of the raw sample data includes:

Verifying the original sampled data based on the valid noise sample data to determine whether the original sample data is available;

If available, determining a touch position of the touch object on the capacitive touch sensor according to the noise sampling data and the original sampling data.
The method according to claim 7, wherein determining the touch position of the touch object on the capacitive touch sensor according to the noise sample data and the original sample data comprises:

Determining a touch area according to the original sample data;

And filtering, according to the noise sampling data, an unreal touch position in the touch area to determine a touch position of the touch object on the capacitive touch sensor.
The method according to claim 7, wherein determining the touch position of the touch object on the capacitive touch sensor according to the noise sample data and the original sample data comprises:

Filtering the original sample data according to the noise sampling data;

And determining, according to the filtered original sampling data, a touch position of the touch object on the capacitive touch sensor.
The method according to claim 9, wherein the filtering the original sample data according to the noise sample data comprises: determining, according to the noise sample data, that the touch object touches on the capacitive touch sensor A noise region formed by time control, and filtering the original sample data according to the noise region.
The method of claim 10, wherein when the capacitive touch sensor is a mutual capacitive touch sensor, determining, according to the noise sampling data, that the touch object is touched on the capacitive touch sensor The noise areas formed include:

Determining a first coordinate according to the noise sampling data output by the sensing electrode when the driving electrode does not load the coding signal, and determining a noise region formed when the touch object touches the capacitive touch sensor according to the first coordinate; and/or ,

The second coordinate is determined according to the noise sampling data output by the driving electrode when the sensing electrode is not loaded with the coding signal, and the noise region formed when the touch object touches the capacitive touch sensor is determined according to the second coordinate.
The method according to claim 7, wherein if the original sample data is not available, determining a touch position of the touch object on the capacitive touch sensor according to the noise sample data.
A capacitive touch device is characterized in that the capacitive touch device is configured to collect raw sampling data output by a capacitive touch sensor through a detecting electrode thereof when being coded, and collecting the capacitive touch sensor is not The noise sampling data output by the detection electrode is detected during coding; and, according to the capacitive touch sensor, when being coded, When the original coded data and the noise sample data output by the detection electrode are not coded, the touch position of the touch object on the capacitive touch sensor is determined.
The device according to claim 13, wherein the capacitive touch sensor is a mutual capacitive touch sensor, and the mutual capacitive touch sensor comprises a driving electrode for loading a coded signal and for outputting the original The sensing electrode for sampling data, the capacitive touch device is further used for:

Collecting noise sampling data output by the sensing electrode when the driving electrode does not load the coding signal; and collecting noise sampling data output by the driving electrode when the sensing electrode does not load the coding signal.
The device of claim 13 , wherein the capacitive touch sensor is a self-capacitive touch sensor, and the self-capacitive touch sensor loads a coded signal through the detection electrode and outputs the detection signal through the detection electrode. And the capacitive touch device is further configured to: when the detecting electrode does not load the coded signal, collect the noise sampling data output by the detecting electrode.
The device according to claim 13, wherein the capacitive touch device is further configured to:

And determining, according to the verification result that the original sampling data is verified by the noise sampling data, determining a touch position of the touch object on the capacitive touch sensor.
The device according to claim 16, wherein the capacitive touch device is further configured to:

Verifying the original sampled data based on the valid noise sample data to determine whether the original sample data is available;

If available, determining a touch position of the touch object on the capacitive touch sensor according to the noise sampling data and the original sampling data.
The device according to claim 17, wherein the capacitive touch device is further configured to:

Determining a touch area according to the original sample data;

And filtering, according to the noise sampling data, an unreal touch position in the touch area to determine a touch position of the touch object on the capacitive touch sensor.
The device according to claim 17, wherein the capacitive touch device is further configured to:

Filtering the original sample data according to the noise sampling data;

And determining, according to the filtered original sampling data, a touch position of the touch object on the capacitive touch sensor.
The device of claim 19, wherein the capacitive touch device is further configured to: determine, according to the noise sampling data, a noise region formed when the touch object touches the capacitive touch sensor Filtering the original sampled data according to the noise region.
The device according to claim 20, wherein when the capacitive touch sensor is a mutual capacitive touch sensor, the capacitive touch device is further configured to:

Determining a first coordinate according to the noise sampling data output by the sensing electrode when the driving electrode does not load the coding signal, and determining a noise region formed when the touch object touches the capacitive touch sensor according to the first coordinate; and/or ,

The second coordinate is determined according to the noise sampling data output by the driving electrode when the sensing electrode is not loaded with the coding signal, and the noise region formed when the touch object touches the capacitive touch sensor is determined according to the second coordinate.
The device according to claim 17, wherein the capacitive touch device is further configured to: if the original sample data is not available, determine, according to the noise sample data, the touch object in the capacitive touch Control the touch position on the sensor.
A capacitive touch terminal, comprising: a capacitive touch sensor, and the capacitive touch device according to any one of claims 13 to 22, wherein the detecting electrode of the capacitive touch sensor and the capacitive touch The device is electrically connected.