TWI435252B - Scanning method of capacitive touch panel - Google Patents

Description

Inductive quantity scanning method of touch panel array

The invention relates to a scanning method of a touch panel, in particular to a sensing quantity scanning method of a touch panel array capable of providing accurate touch point information.

At present, there are two types of touch panels available on the market: resistive and capacitive. Generally, the resistive or capacitive touch panels are mostly arranged in a two-dimensional array manner. As shown in FIG. 1 , the touch panel arrays of X and Y each have M and N points.

Whether it is a resistive or capacitive touch panel, it is necessary to detect the change in the amount of inductance, that is, to detect the change in the resistance or capacitance of each line (XM or YN). The detection method, the conventional technique is: first scan for the X direction, then scan for the Y direction. As shown in Fig. 1, the general scanning method is mostly scanned one by one from X0, X1, ... XM, and the inductance or capacitance of the scanning line is obtained E00, E10, ... EM0. Then, Y0, Y1, ... YN are sequentially scanned one by one, and the resistance or capacitance of the scan line is obtained. Then, the resistance or capacitance sensing amounts E01, E11, ... EM1; ... E0N, E1N, ... EMN are calculated by using the inductance of the X-axis and the inductance of the Y-axis.

Therefore, when there are M signal lines in the X direction and N signal lines in the Y direction, a total of M+N scans are needed to know which signal lines have changed in the X direction, and the Y direction is calculated. There are changes to the signal lines, and the address is changed to address the changed address.

If the scan area is increased, if it is four times as shown in Fig. 1, as shown in Fig. 2, it is a touch panel array with 2M scan lines in the X direction and 2N scan lines in the Y direction. × N points, this conventional technique will need to scan 4*M+4*N times, and it takes a considerable amount of time to scan once.

The above scanning method is quite simple, but the scanning time is quite time consuming. The scan time is long, and the more the number of signal lines is, the more serious it is. In order to solve the problem of too many scans, it is necessary to improve the computing power of the control circuit, which in turn will increase the overall technical cost, including energy consumption and operation speed, and will increase accordingly.

In addition, through the scanning method of the prior art, when dealing with multi-touch, it is easy to have a ghost key (Ghost Key) problem, as shown in Fig. 3, which has two scan lines detected on the X-axis. The amount of change in inductance (X2, X4, respectively), and the scan on the Y-axis with two scan lines detecting the change in inductance (Y2, Y4, respectively). According to the scanning method of the prior art, it is easy to form a total of four points of touch judgment, that is, X2Y2, X2Y4, X4Y2, and X4Y4. However, in reality, there may be only two points of touch, that is, X2Y2, X4Y4 two points, or X2Y4, X4Y2 two points, the other two points form a ghost key (Ghost Key). Therefore, when such a situation is detected, it is necessary to inject the control calculation in the latter stage, which further increases the complexity of the control calculation.

Therefore, the method of improving the accuracy of touch detection has become the main research direction of touch panel control technology.

In view of the above problems in the prior art, the present invention provides a sensing amount scanning method for a touch panel array, which can reduce the total number of scans to reduce overall power consumption and improve computational efficiency.

Another object of the present invention is to provide a sensing amount scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying each of the plurality of a signal source of a different frequency in the first direction; sequentially detecting a capacitance value of the plurality of second direction scan lines and converting it into a detection signal; expanding the detection signal into a spectrum value; and according to the spectrum Value, make a touch point judgment.

The invention further provides a sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method comprises the following steps: supplying each of the plurality of first direction scanning lines a signal source of different frequencies; performing scanning at two time points, sequentially detecting a capacitance value of the plurality of second direction scanning lines and converting it into a detection signal; expanding the detection signal into a spectrum value; The spectral value of the two time points is used to perform the comparison of the individual spectral values of the second direction scan line to perform the touch point determination.

The invention further provides a sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method comprises the steps of: supplying each of the plurality of first direction scanning lines Signal sources of different frequencies; synchronously detecting a plurality of capacitance values of the plurality of second direction scan lines and converting them into a detection signal; expanding the detection signal into a spectrum value; and according to the plurality of plurality of The spectral value of the scanning line in the two directions is determined by the corresponding multiple detection circuits to increase the scanning speed.

The invention further provides a sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method comprises the steps of: supplying each of the plurality of first direction scanning lines a signal source of different frequencies; performing scanning at two time points, synchronously detecting a capacitance value of one of the plurality of second direction scanning lines and converting it into a detection signal; expanding the detection signal into a spectrum value; And according to the spectral value of the plurality of plurality of second direction scan lines, using the comparison of the two time points, the corresponding plurality of detection circuits perform the touch point judgment, thereby increasing the scanning speed.

The invention also provides a sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method comprises the steps of: supplying each of the plurality of first direction scanning lines a signal source of different frequencies; synchronously detecting a capacitance value of one of the plurality of second direction scan lines and converting it into a detection signal; expanding the detection signal into a spectrum value; and based on the two plurality of The spectral value of the scanning line in the two directions is determined by the touch point difference of one of the scanning lines in the first direction.

The invention further provides a method for inductive quantity scanning of a touch panel array, wherein the array has a plurality of first direction scan lines and a plurality of second direction scan lines, comprising the steps of: supplying each of the plurality of first direction scan lines a signal source of different frequencies; detecting a capacitance value of the second direction scan line and converting it into a detection signal; expanding the detection signal into a spectrum value; and performing a touch point determination according to the spectrum value.

In the above various methods, each of the scan lines supplying different frequencies may be used, and each of the scan lines is supplied with a plurality of frequencies, and at least one of the plurality of scan lines has at least one different frequency.

The above and other objects, features and advantages of the present invention will become more apparent and understood.

The invention proposes a new scanning method, which can greatly improve the accuracy of the touch detection and can perform single or multi-point detection. The touch panel mentioned in the method of the present invention may be a touch pad (Touch Pad) on the market, a touch panel (such as a CRT or LCD) for a screen, or the like. Type of touch panel.

Figure 3 is a first diagram of a circuit diagram using the scanning method of the present invention. In the M x N scan matrix having Y rows on the Y axis and N columns on the Y axis, the present invention provides X0, X1, X2, X3 of the X axis, X4, X5, ... Xm-1 scan lines for different frequency sources. The third picture shows the voltage source as the signal source. In practice, the current source can also be used as the signal source. The scan voltage of FIG. 3 is V(f ₀ ), V(f ₁ ), V(f ₂ )V(f ₃ ), V(f ₄ ), V(f ₅ ), ...V(f _M-1 ), wherein f ₀ , f ₁ , f ₂ , f ₃ , f ₄ , f ₅ , ... f _m-1 respectively represent different frequencies. With the supply of such different frequencies, the present invention can make each X-axis scan line have different frequency loads, so that the capacitance sensing changes of different X-axis scan lines will be expressed at different frequencies, that is, , the frequency carried on the scan line. In this way, the amount of capacitance sensing on each scan line can be effectively distinguished.

Figure 3 also shows the detection method, which detects the scan line of column 0 of the Y-axis, and the remaining scan lines are in a floating state. In this detection phase, the 0th column of the Y axis will detect (X0, Y0), (X1, Y0), (X2, Y0), (X3, Y0), (X4, Y0), (X5, Y0). ),...,(Xm-1,Y0) The capacitance of each point, that is, the amount of induction of a single point can be accurately detected. Of course, if there is a change in the amount of inductance in the same column at the same time, the same can be accurately detected.

There are many ways of scanning under the technical conditions of supplying different scanning voltage frequencies, and Fig. 3 discloses the first embodiment. Under such an embodiment, there are a variety of processes for disposal. Please refer to Figures 4A to 4D, which are the first example of the flow chart of the scanning method of the present invention.

First, please refer to FIG. 4A, which is a first specific flowchart, which includes the following steps:

Step 102: Supply a signal source of different frequencies of each X-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 104: sequentially detect the capacitance value of the scan line in the Y-axis direction and convert it into a detection signal. In this step, the capacitance sensing is detected sequentially in the manner as shown in FIG. From Y0, Y1, ... Yn-1, the change in the inductance of the capacitor is sequentially obtained.

Step 106: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 108: Perform a touch point judgment according to the spectrum value. Finally, based on the spectral values of different frequencies, it can be determined which point has a change in the capacitance sensing amount. That is to say, in the normal non-touch state, according to the average voltage average value, it is possible to know where the variation occurs at a varying voltage value, that is, a touch occurs.

The same method can also be used to supply different scanning voltages of the Y-axis and to detect capacitance sensing by the X-axis. Please refer to FIG. 4B, which is a second specific flowchart, and includes the following steps:

Step 112: Supply a signal source of different frequencies in each Y-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 114: sequentially detecting the capacitance value of the X-axis direction scan line and converting it into a detection signal. In this step, the capacitance sensing is detected sequentially in the manner as shown in FIG. From X0, X1, ... Xm-1, the change in the inductance of the capacitor is sequentially obtained.

Step 116: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 118: Perform a touch point judgment according to the spectrum value. Finally, based on the spectral values of different frequencies, it can be determined which point has a change in the capacitance sensing amount. That is to say, in the normal non-touch state, according to the average voltage average value, it is possible to know where the variation occurs at a varying voltage value, that is, a touch occurs.

By using FIG. 4A or FIG. 4B, the present invention only needs to supply the scan voltage for one axis and the scan voltage detection for the other axis, so that the touch detection of the point can be achieved, which not only greatly reduces the detection time, but also greatly reduces the detection time. It can achieve the purpose of accurately detecting touch points. Of course, the purpose of the present invention can also be achieved by using two axes to alternately supply scanning voltages of different frequencies. However, it is more time consuming and the circuit is more complicated and the cost will be higher.

In the judgment of touch, the 4A~4B diagram illustrates the most basic judgment method. Another way to judge is to take a timing judgment method. That is, the determination of the touch is made based on the detected result at different timings. The specific method is described in the flow of 4C to 4D.

Please refer to FIG. 4C, which is a third specific flowchart, which includes the following steps:

Step 122: Supply a signal source of different frequencies for each X-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 124: Perform detection of two time points in a unit time, sequentially detecting the capacitance value of the scan line in the Y-axis direction and converting it into a detection signal. In this step, capacitive sensing detection at two time points is sequentially performed in the manner as shown in FIG. From Y0, Y1, ... Yn-1, the capacitance inductance changes at two time points are sequentially obtained.

Step 126: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 128: According to the spectrum value, the ratio of the two time points is used to make the touch point judgment. Finally, based on the time variation value of the spectral values of different frequencies, it can be determined which point has a change in the capacitance sensing amount. That is to say, when the voltage value of a single point changes at different timings, it is known that the capacitance variation occurs, that is, the touch occurs.

The same method can also be used to supply different scanning voltages of the Y-axis and to detect capacitance sensing by the X-axis. Please refer to FIG. 4D, which is a second specific flowchart, and includes the following steps:

Step 132: Supply a signal source of different frequencies in each Y-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 134: Perform detection of two time points in a unit time, sequentially detecting the capacitance value of the scan line in the x-axis direction and converting it into a detection signal. In this step, capacitive sensing detection at two time points is sequentially performed in the manner as shown in FIG. From X0, X1, ... Xm-1, the capacitance inductance changes at two time points are sequentially obtained.

Step 136: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 138: According to the spectrum value, the ratio of the detection and the detection is used to make the touch point judgment. Finally, based on the time variation value of the spectral values of different frequencies, it can be determined which point has a change in the capacitance sensing amount. That is to say, when the voltage value of a single point changes at different timings, it is known that the capacitance variation occurs, that is, the touch occurs.

In the flow of Figures 4A-4D, a flow chart illustrating the method of the present invention is illustrated. Next, please refer to the 5A~5D diagram, which details the results of the 4A~4D method.

5A~5D is a spectrum timing diagram of the first example of the scanning method of the present invention, wherein FIG. 5A is a capacitive trans spectroscopy diagram of the first column detected at time T=T0. Figure 5B is a diagram of the capacitance demultiplexed spectrum of the first column detected at time T = T1. Figure 5C is a diagram of the capacitance derivation of the first column detected at time T = T2. Figure 5D is a diagram of the capacitance derivation of the first column detected at time T = T3.

It can be found from Fig. 5A~5D that at the same time, the voltage detected by different frequencies has a slight average value. Therefore, if a threshold value (VT) is added for judgment, it can be based on T=T0, T alone. =T1, T=T2, T=T3, etc. The judgment of the touch point is performed at different time points. When T=T0 and T=T3, the voltage values of all frequencies are close, and it can be judged that no touch occurs. When T=T1, f ₃ has a situation where the switching voltage exceeds the threshold. Therefore, it can be judged that the scanning line supplied to f ₃ is touched. In the example of Fig. 3, it is X3 line, that is, The (X3, Y1) point touches. When T=T2, f ₄ has a transition voltage exceeding the threshold. Therefore, it can be judged that the scan line supplied to f ₄ is touched. In the example of Fig. 3, it is X4 line, that is, ( The X4, Y1) point touches.

Using different timing comparisons, you can determine the time, movement, departure, and speed of the touch. Taking the 5A~5D diagram as an example, the first column does not change when T=T0, and the first column of T=T1 changes, indicating that the touch starts, the touch point is (X3, Y1); when T=T2, touch The transition from (X3, Y1) to (X4, Y1) indicates that the movement of the touch object has occurred. When T=T3, the touch point disappears, it may be that the touch object leaves, or the touch object moves to another column, which may be the 0th column or the 2nd column. Therefore, by the movement of the touch point and the moving distance in a unit time, the speed at which the touch object moves can be calculated, thereby obtaining information such as click, double click, slide, and the like of the touch.

In addition, a single scanning line can be used to supply multiple frequencies at different frequencies for each scanning line. For example, two, three, or even more may be supplied, each frequency being different. Supplying multiple frequencies increases discrimination, but the processing circuitry at the back end is relatively complex.

Next, referring to FIG. 6, a second example of a circuit diagram using the scanning method of the present invention provides X-axis X0, X1, X2 in an M×N scan matrix having Y rows on the Y-axis and N columns on the Y-axis. X3, X4, X5, ... Xm-1 scan lines for different frequency signal sources. Figure 6 shows the voltage source as the signal source. In practice, the current source can also be used as the signal source. The scan voltage of FIG. 6 is V(f ₀ ), V(f ₁ ), V(f ₂ )V(f ₃ ), V(f ₄ ), V(f ₅ ), ...V(f _M-1 ), wherein f ₀ , f ₁ , f ₂ , f ₃ , f ₄ , f ₅ , ... f _m-1 respectively represent different frequencies. Figure 6 simultaneously detects the scan lines of column 0 and column 1 of the Y-axis, and the remaining scan lines are in a floating state. In this detection phase, the 0th column of the Y axis will detect (X0, Y0), (X1, Y0), (X2, Y0), (X3, Y0), (X4, Y0), (X5, Y0). ),...,(Xm-1,Y0) The capacitance of each point, that is, the amount of sensing of a single point can be accurately detected; at the same time, the first column of the Y-axis will be detectable (X0) , Y1), (X1, Y1), (X2, Y1), (X3, Y1), (X4, Y1), (X5, Y1), ..., (Xm-1, Y1) capacitance at each point Induction amount. Of course, if there is a change in the amount of inductance in the same column at the same time, the same can be accurately detected.

In the technical conditions for supplying different scanning voltage frequencies, there are many ways of scanning, and FIG. 6 discloses a second embodiment thereof, which is a method of simultaneously detecting two columns, and aims to provide a differential type. Detection mode. In this differential detection mode, there are many processes for disposal. Please refer to FIGS. 7A-7B, which is a second example of the flow chart of the scanning method of the present invention.

First, please refer to FIG. 7A, which is a first specific flowchart, which includes the following steps:

Step 202: Supply a signal source of different frequencies of each X-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 204: Simultaneously detect the capacitance values of the scan lines of the two columns of Y-axis directions and convert them into detection signals. In this step, the capacitance sensing is detected in the manner of simultaneously detecting two columns in the manner as shown in FIG. 6 . From Y0, Y1, ... Yn-1, the capacitance change of the two columns is sequentially obtained.

Step 206: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 208: According to the spectrum value, the touch point judgment is performed by the difference between the adjacent two lines. Finally, based on the spectral values of the adjacent two lines of different frequencies, it can be determined which point has a change in the capacitance sensing amount. This is the calculation method of differential capacitance detection.

The same method can also be used to supply different scanning voltages of the Y-axis and to detect capacitance sensing by the X-axis. Please refer to FIG. 7B, which is a sixth specific flowchart, and includes the following steps:

Step 212: Supply a signal source of different frequencies in each Y-axis direction scan line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 214: sequentially detect the capacitance value of the X-axis direction scan line and convert it into a detection signal. In this step, the capacitance sensing is detected in the manner of simultaneously detecting two columns in the manner as shown in FIG. 6 . From X0, X1, ... Xm-1, the capacitance change of the two columns is sequentially obtained.

Step 216: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 218: According to the spectrum value, the touch point judgment is performed by the difference between the adjacent two columns. Finally, based on the spectral values of the adjacent two columns of different frequencies, it can be determined which point has a change in the capacitance sensing amount. This is the calculation method of differential capacitance detection.

By using the 7A or 7B, the present invention only needs to supply the scan voltage for one axis and the scan voltage detection for the other axis, so that the touch detection of the point can be achieved, which not only greatly reduces the detection time, but also greatly reduces the detection time. It can achieve the purpose of accurately detecting touch points. Of course, the purpose of the present invention can also be achieved by using two axes to alternately supply scanning voltages of different frequencies. However, it is more time consuming and the circuit is more complicated and the cost will be higher.

In the judgment of touch, the 7A~7B diagram illustrates the most basic judgment method. Another way to judge is to take a timing judgment method. That is, the determination of the touch is made based on the detected result at different timings. The specific method is described in the flow of the seventh to seventh embodiments.

Please refer to FIG. 7C, which is a seventh specific flowchart, which includes the following steps:

Step 222: Supply a signal source of different frequencies for each X-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 224: Perform detection of two time points in a unit time, sequentially detecting the capacitance value of the scan line in the Y-axis direction and converting it into a detection signal. In this step, capacitive sensing detection at two time points is sequentially performed in the manner as shown in FIG. From Y0, Y1, ... Yn-1, the capacitance sensing changes at two time points are sequentially obtained.

Step 226: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 228: According to the spectrum value, compare the difference between the two adjacent columns in the two time points to perform the touch point judgment. Finally, based on the time variation value of the spectral values of different frequencies, it can be determined which point has a change in the capacitance sensing amount. That is to say, when the voltage value of a single point changes at different timings, it is known that the capacitance variation occurs, that is, the touch occurs.

The same method can also be used to supply different scanning voltages of the Y-axis and to detect capacitance sensing by the X-axis. Please refer to FIG. 7D, which is an eighth specific flowchart, and includes the following steps:

Step 232: Supply a signal source of different frequencies in each Y-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 234: Perform detection of two time points in a unit time, sequentially detecting the capacitance value of the X-axis direction scan line and converting it into a detection signal. In this step, capacitive sensing detection at two time points is sequentially performed in the manner as shown in FIG. From X0, X1, ... Xm-1, the capacitance inductance changes at two time points are sequentially obtained.

Step 236: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 238: According to the spectrum value, compare the difference between the two adjacent columns in the two time points to perform the touch point judgment. Finally, based on the time variation value of the spectral values of different frequencies, it can be determined which point has a change in the capacitance sensing amount. That is to say, when the voltage value of a single point changes at different timings, it is known that the capacitance variation occurs, that is, the touch occurs.

In the flow of Figures 7A-7D, a flow chart using the method of the present invention is illustrated. Next, please refer to Figures 8A-8F, which specifically illustrate the results of the methods of Figures 7A-7D.

8A-8F is a spectrum timing diagram of the first example of the scanning method of the present invention, wherein FIG. 8A is a capacitive trans spectroscopy diagram of the first column detected at time T=T0. Figure 8B is a diagram of the capacitance demultiplexed spectrum of the second column detected at time T = T0. Figure 8C is a diagram of the capacitance demultiplexed spectrum of the second column minus the first column at time T = T0. Figure 8D is a diagram of the capacitance derivation of the first column detected at time T = T1. Figure 8E is a diagram of the capacitance demultiplexed spectrum of the second column detected at time T = T1. Figure 8F is a diagram of the capacitance derivation of the second column minus the first column at time T = T1.

It can be found from Fig. 8A~8C that when T=T0, the detection of two columns of Y-axis (Y1, Y2) is performed simultaneously, and the subtraction is performed, and the subtraction value is the 8C picture. The average value of the voltages detected at the same frequency is slightly equivalent when there is no capacitance sensing. Therefore, after subtraction, its value should be around 0. If a capacitive sensing amount occurs, that is, if a touch condition occurs, the state of the touch can be detected by judging by a threshold value (VT). In the example of FIG. 8A ~ 8C, it is obvious, in T = T0, f ₃ a case where the voltage difference occurs beyond the threshold, and therefore, it can be determined is supplied to the scanning lines ₃ f touch occurs. And since the value is a positive value, it can be judged that a touch has occurred in the Y2 column, that is, (X3, Y2) has been touched.

It can be found from Fig. 8D~8F that when T=T1, the detection of two columns of Y-axis (Y1, Y2) is performed simultaneously, and subtraction is performed, and the subtraction value is the 8F image. Obviously, at T=T1, f ₄ occurs when the voltage difference exceeds the threshold, and therefore, it can be judged that the scanning line supplied to f ₄ is touched. And since the value is a negative value, it can be judged that a touch has occurred in the Y1 column, that is, (X4, Y1) has been touched.

Using the comparison of different timings, it is possible to judge the entry time, movement, departure and speed of the touch, which is the flow of the 7C~7D diagram. Figures 8A-8F illustrate two column changes at two points in time. Assuming that there are no corresponding changes in other columns, the two time points can make a basic judgment. The judgment rule is similar to that of Figures 3~5 and will not be described. That is to say, the movement speed of the touch object can be calculated by the movement of the touch point and the moving distance in the unit time, thereby obtaining the click, double click, slide, and the like of the touch.

In addition, a single scanning line can be used to supply multiple frequencies at different frequencies for each scanning line. For example, two, three, or even more may be supplied, each frequency being different. Supplying multiple frequencies increases discrimination, but the processing circuitry at the back end is relatively complex.

Figure 9 is a third example of a circuit diagram using the scanning method of the present invention. In the M x N scan matrix having Y rows on the Y axis and N columns on the Y axis, the present invention provides X0, X1, X2, X3 of the X axis, X4, X5, ... Xm-1 scan lines for different frequency signal sources. In Fig. 9, the voltage source is used as the signal source. In practice, the current source can also be used as the signal source. Wherein, the scanning voltage of FIG. 9 is V(f ₀ ), V(f ₁ ), V(f ₂ )V(f ₃ ), V(f ₄ ), V(f ₅ ), ...V(f _M-1 ), wherein f ₀ , f ₁ , f ₂ , f ₃ , f ₄ , f ₅ , ... f _m-1 respectively represent different frequencies.

Figure 9 also shows the detection method. At the same time, it detects the scan lines of the 0th column, the 1st column, the 2nd column, and the 3rd column of the Y axis, and the other scan lines are floating. In the next state, the fourth column, the fifth column, the sixth column, and the seventh column are all four columns of scanning lines, and the remaining scanning lines are in a floating state; and so on. The principle is preferably a certain ratio of the total scan line, such as 1/1, 1/2, 1/3, 1/4... and so on. At the same time of the detection phase, the 0th column of the Y axis will detect (X0, Y0), (X1, Y0), (X2, Y0), (X3, Y0), (X4, Y0), (X5 , Y0),...,(Xm-1,Y0) The capacitance of each point; the first column of the Y-axis will detect (X0, Y1), (X1, Y1), (X2, Y1) , (X3, Y1), (X4, Y1), (X5, Y1), ..., (Xm-1, Y1) capacitance sensing amount per point; Y axis 2 column will be detectable (X0 , Y2), (X1, Y2), (X2, Y2), (X3, Y2), (X4, Y2), (X5, Y2), ..., (Xm-1, Y2) capacitance at each point The amount of induction; the third column of the Y-axis will detect (X0, Y3), (X1, Y3), (X2, Y3), (X3, Y3), (X4, Y3), (X5, Y3),. .., (Xm-1, Y3) The capacitance of each point. That is to say, each column can accurately detect the sensing amount of a single point, but this point requires multiple detection circuits to be synchronized to achieve. In the present embodiment, four sets of detection circuits are required to simultaneously detect four columns.

Of course, if there is a multi-point sensing change at the same time, it can also be accurately detected.

There are many ways of scanning under the technical conditions of supplying different scanning voltage frequencies, and the first embodiment is disclosed in FIG. Under such an embodiment, there are many processes for disposal. Please refer to FIGS. 10A-10D, which is a third example of the flow chart of the scanning method of the present invention.

First, please refer to FIG. 10A, which is a ninth specific flowchart, which includes the following steps:

Step 302: Supply a signal source of different frequencies of each X-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 304: Simultaneously detect the capacitance values of the scan lines of the Y-axis direction of the plurality of columns and convert them into detection signals. In this step, the capacitance sensing is detected sequentially in the manner as shown in FIG. From Y0, Y1, ... Yn-1, the capacitance change of each column is sequentially obtained.

Step 306: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 308: According to the spectrum value, the touch point judgment of each column is performed by using multiple detection circuits. Finally, each of the simultaneously detected columns has its detection circuit based on the spectral values of different frequencies, and it can be determined which point has a change in the capacitance sensing amount. That is to say, in the normal non-touch state, according to the average voltage average value, it is possible to know where the variation occurs at a varying voltage value, that is, a touch occurs.

The same method can also be used to supply different scanning voltages of the Y-axis and to detect capacitance sensing by the X-axis. Please refer to FIG. 10B, which is a tenth specific flowchart, and includes the following steps:

Step 312: Supply a signal source of different frequencies in each Y-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 314: Simultaneously detecting the capacitance values of the scan lines of the X-axis direction of the plurality of columns and converting them into detection signals. In this step, the capacitance sensing is detected sequentially in the manner as shown in FIG. From X0, X1, ... Xm-1, the change in the inductance of the capacitor is sequentially obtained.

Step 316: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 318: Perform a touch point judgment of each row by using multiple detection circuits according to the spectrum value. Finally, each of the simultaneously detected columns has its detection circuit based on the spectral values of different frequencies, and it can be determined which point has a change in the capacitance sensing amount. That is to say, in the normal non-touch state, according to the average voltage average value, it is possible to know where the variation occurs at a varying voltage value, that is, a touch occurs.

By using FIG. 10A or FIG. 10B, the present invention only needs to scan the voltage supply for one axis and scan voltage detection for the other axis to achieve point touch detection, which can not only greatly reduce the detection time, but also greatly reduce the detection time. It can achieve the purpose of accurately detecting touch points. Of course, the purpose of the present invention can also be achieved by using two axes to alternately supply scanning voltages of different frequencies. However, it is more time consuming and the circuit is more complicated and the cost will be higher.

In the judgment of touch, the 10A~10B diagram illustrates the most basic judgment method. Another way to judge is to take a timing judgment method. That is, the determination of the touch is made based on the detected result at different timings. The specific method is described in the flow of 10C~10D.

Please refer to FIG. 10C, which is an eleventh specific flowchart, which includes the following steps:

Step 322: Supply a signal source of different frequencies for each X-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 324: Perform detection of two time points in a unit time, and simultaneously detect capacitance values of the scan lines of the plurality of columns in the Y-axis direction and convert them into detection signals. In this step, capacitive sensing detection at two time points is sequentially performed in the manner as shown in FIG. From Y0, Y1, ... Yn-1, the change in the capacitance of the multi-column capacitance at two time points is sequentially obtained.

Step 326: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 328: According to the spectrum value, the ratio of the two time points is used to make the touch point judgment. Finally, each of the simultaneously detected columns has its detection circuit based on the spectral values of different frequencies, and it can be determined which point has a change in the capacitance sensing amount. That is to say, when the voltage value of a single point changes at different timings, it is known that the capacitance variation occurs, that is, the touch occurs.

The same method can also be used to supply different scanning voltages of the Y-axis and to detect capacitance sensing by the X-axis. Please refer to FIG. 10D, which is a twelfth specific flowchart, and includes the following steps:

Step 332: Supply a signal source of different frequencies in each Y-axis scanning line. The specific frequency supply can be in the form of a rank distance, for example, 6.1 MHz, 6.2 MHz...; 12.1 MHz, 12.2 MHz.... The design can be based on the operating frequency of the supply circuit.

Step 334: Perform detection of two time points in a unit time, and simultaneously detect capacitance values of the plurality of X-axis direction scan lines and convert them into detection signals. In this step, capacitive sensing detection at two time points is sequentially performed in the manner as shown in FIG. From X0, X1, ... Xm-1, multiple rows of capacitance sensing changes at two time points are sequentially obtained.

Step 336: Expand the detection signal into a spectrum value. The detected signals are expanded according to different frequencies to obtain voltage values of different frequencies.

Step 338: According to the spectrum value, the ratio of the detection and the detection is used to make the touch point judgment. Finally, each of the simultaneously detected columns has its detection circuit based on the spectral values of different frequencies, and it can be determined which point has a change in the capacitance sensing amount. That is to say, when the voltage value of a single point changes at different timings, it is known that the capacitance variation occurs, that is, the touch occurs.

In the flow of Figures 10A-10D, a flow chart illustrating the method of the present invention is illustrated. Next, please refer to Figures 11A-11B, which specifically illustrate the results of the methods of Figures 11A-11D.

11A-11B are spectrum timing diagrams of the third example of the flow chart of the scanning method of the present invention. Among them, the 11A is a capacitive transspectrum of the first to fourth columns detected at time T=T0. Figure 11B is a diagram of the capacitance trans spectroscopy of the first to fourth columns detected at time T = T1.

From the 11A-11B chart, it can be found that at the same time, the voltages detected by different frequencies have a slight average value. Therefore, if a threshold value (VT) is added for judgment, the columns at different time points can be Make a judgment of the touch point. When T=T0, each column, including Y0, Y1, Y2, Y3, the voltage values of all frequencies are close, and it can be judged that no touch occurs. When at T = T1, Y2 and Y3 of the f _{3 f. 4} occurs beyond the threshold voltage of the converter case, therefore, it can be determined is supplied to the scanning line Y2 and f ₃ occurs and a touch scanning line _{Y3. 4} is f A touch has occurred. In the example of Fig. 9, the X3 line of Y2 and the X4 line of Y3, that is, (X3, Y2), (X4, Y3) are touched.

With the embodiment of Figures 9-10, the effect of doubling the scanning speed can be achieved. That is to say, at the same time, if two sets of detection circuits are used at the same time, the detection speed of 2 times can be achieved, three sets can be up to three times, four groups can be up to four times, and so on.

Similarly, using different timing comparisons, it is also possible to determine the entry time, movement, departure, and speed of the touch. Moreover, by the movement of the touch point and the moving distance in a unit time, the speed at which the touch object moves can be calculated, thereby obtaining information such as click, double click, slide, and the like of the touch.

The conversion of spectral values is a part of the prior art, which can be fully understood and implemented by those skilled in the art, for example, Discrete Fourier Transform (DFT), Fast Fourier Transform (FFT). And so on.

In addition, a single scanning line can be used to supply multiple frequencies at different frequencies for each scanning line. For example, two, three, or even more may be supplied, and at least one of the plurality of frequencies carried on the two scanning lines is different. Supplying multiple frequencies can achieve the purpose of reaching the touch judgment with less frequency. At the same time, it can also increase the anti-interference ability. However, the processing circuit at the back end is relatively complicated.

For a specific embodiment, please refer to FIG. 12, which is a schematic diagram of a single scan line of the present invention supplying two frequencies. In the M×N scan matrix having M rows on the Y axis and N columns on the Y axis, the present invention provides X-axis X0, X1, X2, X3, X4, X5, ... Xm-1 scan lines individually 2 different Frequency signal source. In Fig. 12, the voltage source is used as the signal source. In practice, the current source can also be used as the signal source. The scan voltage of FIG. 12 is V(f ₀ , f ₁ ), V(f ₂ , f ₃ ), V(f ₄ , f ₅ ), V(f ₆ , f ₇ ), V(f ₈ , f ₉ ), V(f ₁₀ , f ₁₁ ), ...V(f _2m , f _2m+1 ), where f ₀ , f ₁ , f ₂ , f ₃ , f ₄ , f ₅ ,... f _2m+1 represents different frequencies, respectively. There are two different frequencies on each scan line, and the two different frequencies of any two scan lines are different. In addition, Fig. 12 is scanned in a sequential scanning manner.

In the embodiment of Fig. 12, two different frequencies are supplied on each scan line for identification of touch. Since the frequencies supplied on each scan line are different, the corresponding spectral values are also quite different. As shown in Fig. 13, it is an example of the spectrum value of Fig. 12, which is the spectral value of the Y1 scan line when T = T0, T = T1, T = T2, and T = T3, respectively. It can be seen from the figure that when T=T0, no condition occurs, and when T=T1, the condition exceeding the threshold VT is detected at the frequencies f ₂ and f ₃ . When T=T2, the f ₄ and f ₅ frequencies detect a condition exceeding the threshold VT. When T=T3, no condition occurs. It can be judged from Fig. 13 that when T=T1, a touch occurs at X1, that is, a touch occurs at (X1, Y1); when T=T2, a touch occurs at X2, that is, , (X2, Y1) point touch.

Next, please refer to FIG. 14, a schematic diagram of a second embodiment in which a single scan line of the present invention supplies two frequencies. In the M×N scan matrix having M rows on the Y axis and N columns on the Y axis, the present invention provides X-axis X0, X1, X2, X3, X4, X5, ... Xm-1 scan lines individually 2 different Frequency signal source. The 14th figure uses the voltage source as the signal source. In practice, the current source can also be used as the signal source. Wherein, the scanning voltage of FIG. 14 is V(f ₀ , f ₁ ), V(f ₀ , f ₂ ), V(f ₀ , f ₃ ), V(f ₀ , f ₄ ), V(f ₁ , f ₂ ), V(f ₁ , f ₃ ), ...V(f _a , f _b ), where f ₀ , f ₁ , f ₂ , f ₃ , f ₄ , f ₅ , ... f _a , f _b respectively represents different frequencies, and the two frequencies supplied on each scan line, the two scan lines are compared with at least one frequency. In addition, Figure 14 scans in a single scan mode.

In the embodiment of Fig. 14, two different frequencies are supplied on each scan line for identification of touch. Since two different frequencies are supplied on each scan line, at least one of the two frequencies between each two scan lines is different. Therefore, when a single touch occurs, there is still a situation as shown in Fig. 13, that is, there are cases where two frequencies exceed a threshold value, and therefore, the occurrence of a touch can be judged. When two consecutive touches occur, for example, (X1, Y1), (X2, Y1), there will be f ₀ , f ₂ , f ₃ The values of the three frequencies are greater than the threshold, and due to f ₀ It is a common frequency, so its value will be greater than the other two frequencies. The rest of the touch points are judged the same and will not be described again.

In the embodiment of Fig. 14, the number of frequencies required to be supplied is less than that of Fig. 12, and therefore, the design on the circuit is relatively simple. With the same concept, more than two frequencies can be designed on each scan line. Figure 15 shows an embodiment in which three frequencies are supplied to each scan line. In the M×N scan matrix having M rows on the Y axis and N columns on the Y axis, the present invention provides XX X1, X1, X2, X3, X4, X5, ... Xm-1 scan lines individually 3 different Frequency signal source. In Figure 15, the voltage source is used as the signal source. In practice, the current source can also be used as the signal source. Wherein, the scanning voltage of Fig. 15 is V(f ₀ , f ₁ , f ₂ ), V(f ₀ , f ₁ , f ₃ ), V(f ₀ , f ₁ , f ₄ ), V(f ₀ , f ₂ , f ₃ ), V(f ₀ , f ₂ , f ₄ ), V(f ₀ , f ₃ , f ₄ ), ...V(f _a , f _b , f _c ), where f ₀ , f ₁ , f ₂ , f ₃ , f ₄ , f ₅ ,...f _a , f _b , f _c respectively represent different frequencies, and three frequencies supplied on each scanning line, between two scanning lines Compare at least one frequency is not the same. In addition, the 15th image is scanned in a sequential scanning manner.

It takes three different frequencies on each scan line for identification of touches. Since three different frequencies are supplied on each scan line, at least one of the two frequencies between each two scan lines is different. Therefore, when a single touch occurs, there is still a situation as shown in Figs. 13B to C, that is, there are three frequencies that exceed the threshold value, and therefore, the occurrence of the touch can be judged. When two consecutive touches occur, for example, (X1, Y1), (X2, Y1), there will be f ₀ , f ₁ , f ₂ , f ₃ The values of the four frequencies are greater than the threshold, and Since f ₀ , f ₃ , are common frequencies, their values will be greater than the other two frequencies. The rest of the touch points are judged the same and will not be described again.

The 12th, 14th, and 15th figures only describe the partial multi-frequency supply. In practice, the multiple frequencies can be completely different, or multiple frequencies on each scan line, and the two scan lines are compared with at least one different one. situation. For the calculation of the minimum required frequency, taking two frequencies for each scanning line as an example, the value of the scanning line number m is equal to the combination number a is taken as 2; taking three frequencies for each scanning line as an example, The value of the number of scanning lines m is equal to the manner in which the combination number a is taken as 3. And so on. The maximum value is the multiple frequencies supplied for each scan line, which is completely different, and each scan line is supplied.

While the preferred embodiment of the invention has been described above, it is not intended to limit the invention, and it is obvious to those skilled in the art that the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

DV1‧‧‧ voltage

F0,f1,f2,f3,f4,f5,...fm-1‧‧‧frequency

VT‧‧‧ threshold

X0, X1, X2, X3, X4, X5, ... X _m-1 ‧‧‧ scan lines

X10, X11, X12, X13, X14, X15,...X1M‧‧‧ scan line

Y0, Y1, Y2, Y3, Y4, Y5, ... Y _m-1 ‧‧‧ scan line

V(f ₀ ), V(f ₁ ), V(f ₂ ), V(f ₃ ), V(f ₄ ), V(f ₅ ),...V(f _m-1 )‧‧‧ scan Voltage

E00, E10.E20, E30, E40, E50...EM0‧‧‧Induction

E01, E11, E21, E31, E41, E51...EM1‧‧‧Induction

E02, E12, E22, E32, E42, E52...EM2‧‧‧Induction

E03, E13, E23, E33, E43, E53...EM3‧‧‧Induction

E04, E14, E24, E34, E44, E54...EM4‧‧‧Induction

E05, E15, E25, E35, E45, E55...EM5‧‧‧Induction

E0N, E1N, E2N, E3N, E4N, E5N...EMN‧‧‧Induction

Figure 1 is a touch panel array with X and N points for each of X and Y; and 2 is a touch panel array with 2M scan lines in the X direction and 2N scan lines in the Y direction; 3 is a first example of a circuit diagram using the scanning method of the present invention; 4A to 4D are the first example of the scanning method of the present invention; and 5A to 5D are the first example of the scanning method of the present invention. FIG. 6 is a second example of a circuit diagram using the scanning method of the present invention; FIGS. 7A-7B are a second example of a scanning method of the present invention; and FIGS. 8A-8F are scanning of the present invention. Method sequence diagram of the second example of the flow chart; Figure 9 is a third example of the circuit diagram using the scanning method of the present invention; 10A-10D is the third example of the scanning method of the present invention; 11A-11B The spectrum timing chart of the third example of the scanning method flow chart of the present invention; FIG. 12 is a schematic diagram of the two scanning lines of the present invention supplying two frequencies; and FIG. 13 , the single scanning line of the present invention supplies two frequency spectrums. Figure 14 is a second embodiment of a single scan line of the present invention supplying two frequencies; and a fifteenth A single scan line of the present invention serves three frequencies FIG.

X0, X1, X2, X3, X4, X5, ... X _m-1 ‧‧‧ scan lines

Y0, Y1, Y2, Y3, Y4, Y5, ... Y _m-1 ‧‧‧ scan line

V(f ₀ ), V(f ₁ ), V(f ₂ ), V(f ₃ ), V(f ₄ ), V(f ₅ ),...V(f _m-1 )‧‧‧ scan Voltage

Claims (36)

A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines a source; detecting a capacitance value of the plurality of second direction scan lines and converting it into a detection signal; expanding the detection signal into a spectrum value; and performing a touch point determination according to the spectrum value. The method according to claim 1, wherein the touch point determination is determined according to a threshold value, and when at least one of the spectral values exceeds the threshold, determining that at least one occurs. Tap and touch. The method according to claim 1, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method of claim 2, wherein the signal source of each of the plurality of first direction scan lines is supplied with a plurality of signal sources of the plurality of first direction scan lines, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by each of the plurality of first direction scan lines is different. The method according to claim 1, wherein the signal source is selected from the group consisting of a voltage source and a current source. A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines Detecting a first time and a second time in a unit time, sequentially detecting a capacitance value of the plurality of second direction scan lines and converting the signal into a detection signal; expanding the detection signal And comparing the spectral values of the first time and the second time of the scan line of the second direction to perform the touch point determination. The sensing quantity scanning method of the touch panel array according to claim 6 , wherein the touch point determination is determined according to a threshold value, and when at least one of the spectral values exceeds the threshold, determining that at least one occurs Tap and touch. The method of claim 2, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method of claim 2, wherein the signal source of each of the plurality of first direction scan lines is supplied with a frequency source of each of the plurality of first direction scan lines, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by each of the plurality of first direction scan lines is different. The method of claim 2, wherein the source of the signal is selected from the group consisting of a voltage source and a current source. A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines Detecting a plurality of capacitance values of the plurality of second direction scan lines and converting them into a detection signal; expanding the detection signal into a spectrum value; and according to the plurality of plurality of second direction scan lines The spectrum value is judged by a corresponding plurality of detecting circuits to increase the scanning speed. The method according to claim 11, wherein the touch point determination is determined according to a threshold value, and when at least one of the spectral values exceeds the threshold, determining that at least one occurs. Tap and touch. The method of claim 1, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method of claim 1, wherein the signal source of each of the plurality of first direction scan lines is supplied with a frequency source of each of the plurality of first direction scan lines, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by each of the plurality of first direction scan lines is different. The method for inductive scanning of a touch panel array according to claim 11, wherein the signal source is selected from the group consisting of a voltage source and a current source. A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines a first time and a second time scan in a unit time, synchronously detecting a capacitance value of the plurality of the plurality of second direction scan lines and converting into a detection signal; and detecting the detection signal Expanding to a spectral value; and comparing the spectral values of the plurality of second-direction scan lines according to the spectral values of the first time and the second time, and corresponding to the plurality of detecting circuits Touch to judge, in order to increase the speed of scanning. The method for inductive quantity scanning of a touch panel array according to claim 16 , wherein the touch point determination is determined according to a threshold value, and when at least one of the spectral values exceeds the threshold, determining that at least one occurs Tap and touch. The method of claim 1, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method of claim 1, wherein the signal source of each of the plurality of first direction scan lines is supplied with a frequency source of each of the plurality of first direction scan lines, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by the plurality of the plurality of first direction scan lines is different. The method for inductive quantity scanning of a touch panel array according to claim 16 , wherein the signal source is selected from the group consisting of a voltage source and a current source. A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines Detecting a capacitance value of one of the plurality of second direction scan lines and converting it into a detection signal; expanding the detection signal into a spectrum value; and according to the two second direction scan lines The spectral value is judged by the touch point difference of one of the scan lines in the same first direction. The method for inductive quantity scanning of a touch panel array according to claim 21, wherein the touch point judgment is determined according to a threshold value, and when at least one of the difference values exceeds the threshold value, determining that at least one occurs Tap and touch. The method according to claim 21, wherein the two of the plurality of second direction scanning lines are adjacent. The method of claim 2, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method for inductive quantity scanning of a touch panel array according to claim 21, wherein a source of signals of different frequencies of each of the plurality of first direction scan lines is supplied, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by the plurality of the plurality of first direction scan lines is different. The method for inductive scanning of a touch panel array according to claim 21, wherein the signal source is selected from the group consisting of a voltage source and a current source. A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines Detecting a first time and a second time in a unit time, synchronously detecting a capacitance value of one of the plurality of second direction scan lines and converting the value into a detection signal; Expanding to a spectral value; and comparing the spectral values of the two second direction scan lines, using the first time and the second time of the spectral value to compare one of the scan lines in the same first direction Make a touch point judgment. . The method for sensing the amount of touch of the touch panel array according to claim 27, wherein the touch point judgment is determined according to a threshold value, and when at least one of the spectrum values exceeds the threshold, determining that at least one occurs Tap and touch. The method of claim 2, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method for inductive quantity scanning of a touch panel array according to claim 27, wherein a source of signals of different frequencies of each of the plurality of first direction scan lines is supplied, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by the plurality of the plurality of first direction scan lines is different. The method for inductive scanning of a touch panel array according to claim 27, wherein the signal source is selected from the group consisting of a voltage source and a current source. A sensing quantity scanning method for a touch panel array, wherein the array has a plurality of first direction scanning lines and a plurality of second direction scanning lines, and the method includes the following steps: supplying signals of different frequencies of each of the plurality of first direction scanning lines Detecting a capacitance value of the second direction scan line and converting it into a detection signal; expanding the detection signal into a spectrum value; and performing a touch point determination according to the spectrum value. The method for inductive quantity scanning of a touch panel array according to claim 32, wherein the touch point judgment is determined according to a threshold value, and when at least one of the spectrum values exceeds the threshold, determining that at least one occurs. Tap and touch. The method according to claim 32, wherein the signal source of each of the plurality of first direction scan lines is supplied with a single frequency for each scan line. The method for inductive quantity scanning of a touch panel array according to claim 32, wherein a source of signals of different frequencies of each of the plurality of first direction scan lines is supplied, and the plurality of first direction scan lines are supplied for each of the plurality of first direction scan lines. And a frequency of at least one of the plurality of frequencies supplied by the plurality of the plurality of first direction scan lines is different. The method for inductive quantity scanning of a touch panel array according to claim 32, wherein the signal source is selected from the group consisting of a voltage source and a current source.