CN107357472A - Touch system, touch pen and detection method thereof - Google Patents

Abstract

The invention relates to a touch control pen and a detection method thereof, wherein the touch control pen is used for operating on a touch control device, a first electrode, a second electrode and a third electrode are sequentially arranged along the axial direction of the pen body of the touch control pen, the second electrode and the third electrode are separated by a first distance, a controller arranged in the touch control pen provides three driving signals with different frequencies for the first electrode to the third electrode respectively, so that the touch control device generates first induction information, second induction information and third induction information respectively, and the touch control device judges an inclination angle or orientation information of the touch control pen according to the second induction information and the third induction information.

Description

Touch system, stylus and detection method thereof

technical field

The invention relates to touch detection, in particular to a touch pen and a detection method thereof.

Background technique

Touch devices, such as touch pads or touch panels, have been widely used in electronic products. Users can use objects such as fingers or stylus to operate on the surface of a touch device to realize Enter purpose. The tilt state or direction of the stylus can provide references for some applications when performing certain functions.

Contents of the invention

The main purpose of the present invention is to provide a touch pen and a detection method thereof.

To achieve the aforementioned purpose, the stylus of the present invention is used to operate on a touch device, and the stylus includes:

A pen body is provided with a first electrode, a second electrode and a third electrode in sequence along the axis of the pen body, and the second electrode is separated from the third electrode by a first distance; and

A controller is located inside the pen body, the controller provides a first driving signal with a first frequency, a second driving signal with a second frequency, and a third driving signal with a third frequency, the first a frequency, the second frequency and the third frequency are three different frequencies;

Wherein, the first electrode, the second electrode and the third electrode respectively and simultaneously receive the first driving signal, the second driving signal and the third driving signal, the second electrode and the third electrode are used to The second sensing information and the third sensing information are generated on the touch device for the touch device to determine a tilt angle or an orientation information of the stylus, and the first electrode is used to transmit a signal to the touch device, It is used for the touch device to judge and obtain the position of the stylus.

The detection method of the stylus of the present invention is used for judging the inclination angle between the stylus and a touch device, the stylus includes a first electrode, a second electrode and a third electrode, the first electrode The second electrode is separated from the third electrode by a first distance, and the method includes:

(a) using the touch device to detect the stylus;

(b) Processing the detection result of step (a), obtaining a first sensing information corresponding to a first frequency, a second sensing information corresponding to a second frequency, and a third sensing information corresponding to a third frequency ;

(c) calculating the position of the stylus according to the first sensing information;

(d) calculating a second two-dimensional coordinate according to the second sensing information, and calculating a third two-dimensional coordinate according to the third sensing information;

(e) calculating a second distance between the second two-dimensional coordinate and the third two-dimensional coordinate; and

(f) determining the inclination angle according to the first distance and the second distance.

Another detection method for a stylus of the present invention is used to determine the orientation information between the stylus and a touch device, the stylus includes a first electrode, a second electrode and a third electrode, The second electrode is separated from the third electrode by a first distance, the first electrode, the second electrode and the third electrode are respectively simultaneously applied with driving signals having a first frequency, a second frequency and a third frequency, the method Include:

(a) using the touch device to detect the stylus;

(b) Processing the detection result of step (a), obtaining a first induction information corresponding to the first frequency, a second induction information corresponding to the second frequency, and a third induction corresponding to the third frequency information;

(c) calculating the position of the stylus according to the first sensing information; and

(d) Determining an orientation information according to the second sensing information and the third sensing information.

The present invention provides a touch control system, including:

A stylus, including:

A pen body is provided with a first electrode, a second electrode and a third electrode in sequence along the axis of the pen body, and the second electrode is separated from the third electrode by a first distance; and

A controller is located inside the pen body, the controller provides a first driving signal with a first frequency, a second driving signal with a second frequency, and a third driving signal with a third frequency, the first A frequency, the second frequency and the third frequency are three different frequencies, wherein the first electrode, the second electrode and the third electrode respectively and simultaneously receive the first driving signal, the second driving signal and the a third drive signal; and

A touch device for detecting the stylus and processing the detection result to obtain a first sensing information corresponding to the first frequency, a second sensing information corresponding to the second frequency and a sensing information corresponding to the third frequency A third sensing information, the touch device performs calculation according to the second sensing information and the third sensing information to determine the inclination angle or orientation information of the stylus.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1 : A schematic diagram of a touch control system of the present invention.

Fig. 2: A schematic diagram of the inclination angle of the stylus of the present invention relative to the touch device.

FIG. 3 : A schematic diagram of the orientation information of the stylus relative to the touch device according to the present invention.

Fig. 4: Circuit block diagram of the stylus of the present invention.

Fig. 5: Schematic diagram of the touch device of the present invention.

Fig. 6: a flow chart of the method for detecting the tilt angle of the stylus of the present invention.

FIG. 7 : A schematic diagram of first to third sensing information respectively corresponding to the first to third electrodes of the present invention.

FIG. 8 : A schematic diagram of first to third two-dimensional coordinates corresponding to first to third sensing information in the present invention, respectively.

Fig. 9: a flow chart of the detection method of the orientation information of the stylus according to the present invention.

Fig. 10: a flow chart of the first embodiment of the step of determining orientation information in the present invention.

11A to 11C are schematic diagrams of three relative positional relationships between the third electrode and the second electrode of the stylus of the present invention in the first direction.

FIG. 12 : A schematic diagram of combinations of the first flag value and the second flag value corresponding to different orientation information in the present invention.

Fig. 13: A flow chart of the second embodiment of the step of determining orientation information in the present invention.

FIG. 14 : a flowchart of the first embodiment for determining the first flag value and the second flag value in FIG. 13 .

15A-15C: Schematic diagrams of calculating the center of gravity value of the present invention.

FIG. 16 : a flowchart of the second embodiment for determining the first flag value and the second flag value in FIG. 13 .

detailed description

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

Please refer to FIG. 1 , which is a schematic diagram of a touch control system according to the present invention. The touch control system includes a stylus 100 and a touch device 300. According to the present invention, it is possible to determine an inclination angle or a orientation information. Firstly, the meaning of the inclination angle and orientation information will be explained. Please refer to FIG. 2, the inclination angle θ represents the angle formed between the stylus 100 and the surface of the touch device 300; please also refer to the top view shown in FIG. , in an embodiment of the present invention, according to the horizontal direction and vertical direction of the touch device 300, nine directions such as east, west, south, north, northeast, southeast, southwest, northwest and center can be defined, and the direction information That is to say which direction the front end to the rear end of the stylus 100 is facing. In other embodiments, more orientations can be defined according to the horizontal direction and the vertical direction of the touch device 300, such as 360 degrees, and the orientation information represents which orientation the front end of the stylus 100 is facing from the rear end. . Please note that the “center” marked in FIG. 3 does not mean the center of the touch device 300 . For easy understanding, the “center” in FIG. 3 can be regarded as the position of the front end of the stylus 100 on the touch device 300 . When the stylus is almost or completely perpendicular to the plane of the touch device 300 , the orientation information of the stylus 100 will be judged as "center", because the stylus at this time is not biased towards one of the other eight directions. As shown in FIG. 4, according to an embodiment of the present invention, the stylus 100 includes a body 10 and a controller 20, one end of the body 10 has a head H, on the head H A first electrode 11 , a second electrode 12 and a third electrode 13 are arranged in sequence along the axis of the pen body 10 , wherein the second electrode 12 and the third electrode 13 are separated by a first distance D1 . In the embodiment shown in FIG. 4 , the first electrode 11 to the third electrode 13 are annular electrodes, which are arranged around the pen head H. As shown in FIG. The first electrode 11 is disposed at the front end of the pen head H. As shown in FIG. The controller 20 is located inside the pen body 10 and is used to provide a first driving signal with a first frequency, a second driving signal with a second frequency, and a third driving signal with a third frequency, wherein , the first to third frequencies are three different frequencies. In the embodiment shown in Figure 4, the controller 20 includes a first signal generator 21, a second signal generator 22 and a third signal generator 23, the first signal generator 21 is electrically connected to the first An electrode 11 , the second signal generator 22 is electrically connected to the second electrode 12 , and the third signal generator 23 is electrically connected to the third electrode 13 . The first signal generator 11 is used to provide the first driving signal to the first electrode 11, the second signal generator 22 is used to provide the second driving signal to the second electrode 12, and the third signal generator 23 is used for providing a third driving signal to the third electrode 13 . The first electrode 11, the second electrode 12 and the third electrode 13 respectively and simultaneously receive the first driving signal, the second driving signal and the third driving signal, the second electrode 12 and the third electrode 13 are used to The second sensing information and the third sensing information are generated on the touch device 300 for the touch device 300 to determine a tilt angle or an orientation information of the stylus 100, and the first electrode 11 is used to transmit signals For the touch device 300 , for the touch device 300 to obtain the position of the stylus 100 . In one embodiment, the controller 20 simultaneously and respectively outputs the first, second and third driving signals to the first electrode 11 , the second electrode 12 and the third electrode 13 . In other embodiments, the first electrode 11 , the second electrode 12 and the third electrode 13 are disposed at different positions, for example, the third electrode 13 is disposed at the end of the pen body 10 .

The touch device 300 is used for detecting the stylus 100 . The detection results are processed (such as Fourier transform), and the first sensing information Sense_data1 corresponding to the first electrode 11, the second sensing information Sense_data2 corresponding to the second electrode 12, and the third sensing information corresponding to the third electrode 13 can be obtained. Sense_data3, wherein the tilt angle or orientation information of the stylus 100 can be determined according to the second sensing information Sense_data2 and the third sensing information Sense_data3. The touch device 300 can be a touch pad (touch pad), a touch panel (Touch panel) or a drawing board (Graphic tablet/digitizer). In one embodiment, as shown in FIG. 5, the touch The device 300 includes a plurality of first sensing electrodes 310 arranged along a first direction (such as the X direction), and a plurality of second sensing electrodes 320 arranged along a second direction (such as the Y direction). The electrodes 310 and the plurality of second sensing electrodes 320 are insulated and vertically intersect, but other configurations are also feasible.

Please refer to FIG. 6 , which is an embodiment of the detection method of the stylus according to the present invention, which can be used to detect the inclination angle θ of the stylus. The detection method can be applied to the aforementioned touch system, wherein the detection method includes the following steps:

S61: Simultaneously apply a first driving signal of a first frequency, a second driving signal of a second frequency and a third driving signal of a third frequency to the first electrode, the second electrode and the third electrode respectively ;

S62: Using the touch device to detect the stylus;

S63: Process the detection result to obtain a first sensing information corresponding to the first frequency, a second sensing information corresponding to the second frequency, and a third sensing information corresponding to the third frequency;

S64: Calculate the position of the stylus according to the first sensing information;

S65: Calculate a second two-dimensional coordinate according to the second sensing information, and calculate a third two-dimensional coordinate according to the third sensing information;

S66: Calculate a second distance between the second two-dimensional coordinate and the third two-dimensional coordinate;

S67: Determine an inclination angle according to the first distance D1 and the second distance D2.

The above steps S61-S67 are further described in detail as follows:

One of the ways to realize step S61 is that the controller 20 of the stylus 100 simultaneously outputs the first driving signal of the first frequency to the first electrode 11 and the second driving signal of the second frequency to the second electrode 12, A third driving signal of a third frequency is given to the third electrode 13 .

Step S62 is to detect the stylus 100 by the touch device 300 . The three electrodes 11 , 12 and 13 of the stylus 100 cause electrical changes of the sensing electrodes 310 and 320 of the touch device. The state of the stylus 100 can be determined by the electrical changes of the sensing electrodes 310 and 320 . In one embodiment, in step S62 , sensing data are received from the plurality of first sensing electrodes 310 and the plurality of second sensing electrodes 320 of the touch device 300 . In another implementation, the sensing data is received from a plurality of first sensing electrodes 310 or a plurality of second sensing electrodes 320, and the received sensing data is related to the distance between each first sensing electrode 310 and each second sensing electrode 320. related to capacitance.

Step S63 is to process the detection result of step S62. The result of the detection in step S62 includes sensing data received from multiple first sensing electrodes 310 and/or multiple second sensing electrodes 320, and these sensing data can be obtained respectively after processing (for example, Fourier transform). The first sensing information Sense_data1 corresponding to the first frequency, the second sensing information Sense_data2 corresponding to the second frequency, and the third sensing information Sense_data3 corresponding to the third frequency.

Further, as shown in FIG. 7 , after the sensing data of the first sensing electrode 310 in the first direction is processed (such as Fourier transform), the first group of sensing quantities X1_data and the second group of sensing quantities X2_data can be obtained. Similar to the third group of sensing quantities X3_data; similarly, after the sensing data of the second sensing electrode 320 in the second direction is processed (such as Fourier transform), the fourth group of sensing quantities Y1_data and the fifth group of sensing quantities Y2_data can be obtained. And the sixth group of sensing quantity Y3_data. In this example, the first sensing information Sense_data1 includes the first group of sensing quantities X1_data and the fourth group of sensing quantities Y1_data; the second sensing information Sense_data2 includes the second group of sensing quantities X2_data and the fifth group of sensing quantities Y2_data; The third sensing information Sense_data3 includes the third group of sensing quantities X3_data and the sixth group of sensing quantities Y3_data.

In the above steps, the detection result of the stylus 100 is analyzed to obtain three sets of sensing information Sense_data1 , Sense_data2 and Sense_data3 , and each set of sensing information can be understood as the influence of an electrode of the stylus on the touch device 300 . For example, the first set of sensing quantities X1_data represents the electrical changes caused by the first electrode 11 to the plurality of sensing electrodes 310 . That is to say, the analyzed three sets of sensing information Sense_data1 , Sense_data2 and Sense_data3 correspond to the first electrode 11 , the second electrode 12 and the third electrode 13 respectively.

In step S64, the first position x1 is calculated according to the first set of sensing quantities X1_data, and a fourth position y1 is calculated according to the fourth set of sensing quantities Y1_data, and the first position x1 and the fourth position y1 form the first two-dimensional coordinates P1(x1,y1). In one embodiment, the first two-dimensional coordinate P1 (x1, y1) is used as the position of the stylus 100 . In other embodiments, compensation or other processing is performed on the first set of sensing quantities X1_data and the fourth set of sensing quantities Y1_data, or the first two-dimensional coordinates P1(x1, y1), to determine the position of the stylus 100 .

In step S65, the second position x2 is calculated according to the second set of sensing quantities X2_data, and a fifth position y2 is calculated according to the fifth set of sensing quantities Y2_data. The second position x2 and the fifth position y2 form a second two-dimensional seat Label P2(x2,y2). The third position x3 is calculated according to the third set of sensing quantities X3_data, and a sixth position y3 is calculated according to the sixth set of sensing quantities Y3_data. The third position x3 and the sixth position y3 form a third two-dimensional coordinate P3(x3, y3).

Calculating the two-dimensional coordinates according to the sensing quantities in the X direction and the Y direction is well known to those in the field of touch control, and will not be repeated here.

In step S66 , a second distance D2 between the second two-dimensional coordinate P2 ( x2 , y2 ) and the third two-dimensional coordinate P3 ( x3 , y3 ) is calculated. In one embodiment, the second two-dimensional coordinate P2 (x2, y2) and the third two-dimensional coordinate (x3, y3) are substituted into the formula The second distance D2 is calculated, as shown in FIG. 8 .

In step S67 , the inclination angle θ is obtained by performing a trigonometric operation according to the first distance D1 and the second distance D2 . The tilt angle θ represents the tilt angle of the stylus 100 relative to the touch device 300 , and in one embodiment, the tilt angle θ is calculated by using the trigonometric function arccos(D2/D1), as shown in FIG. 2 . In one embodiment, steps S62 to S67 are executed by a controller 330 (as shown in FIG. 1 ) included in the touch device 300 , and the controller 330 is coupled to the plurality of sensing electrodes 310 and 320 . The tilt angle θ calculated by the controller 330 of the touch device 300 is sent to a host, such as a central processing unit (CPU) of a computer.

Please refer to FIG. 9 , which is another embodiment of the detection method of the stylus of the present invention, which can be used to detect the orientation information of the stylus. The detection method can be applied to the aforementioned touch system, and the detection method includes the following steps:

S91: Simultaneously apply a first driving signal of a first frequency, a second driving signal of a second frequency and a third driving signal of a third frequency to the first electrode, the second electrode and the third electrode respectively ;

S92: Using the touch device to detect the stylus;

S93: Process the detection result to obtain a first sensing information corresponding to the first frequency, a second sensing information corresponding to the second frequency, and a third sensing information corresponding to the third frequency;

S94: Calculate the position of the stylus according to the first sensing information;

S95: Determine a piece of orientation information according to the second sensing information and the third sensing information.

For the technical content of steps S91 , S92 , S93 and S94 , please refer to the description of the above steps S61 , S62 , S63 and S64 , and details will not be repeated here.

Please refer to FIG. 10 , the first embodiment for realizing step S95 to determine the orientation information includes the following steps:

S101: Calculate a second position x2 in the first direction and a fifth position y2 in the second direction according to the second sensing information Sense_data2.

S102: Calculate a third position x3 in the first direction and a sixth position y3 in the second direction according to the third sensing information Sense_data3.

S103: Calculate a first difference Δx between the third position x3 and the second position x2. The first difference Δx is obtained, for example, by subtracting the second position x2 from the third position x3.

S104: Determine a first flag value f1 corresponding to the first difference Δx. In one embodiment, step S104 is implemented by comparing the first difference Δx with a first preset range (−TH1˜TH1) to determine a first flag value f1. The first difference Δx can be understood as the relative positional relationship between the third electrode 13 and the second electrode 12 of the stylus 100 in the first direction (such as the X direction). As shown in Figures 11A to 11C, if the first difference Δx is positive, it means that the third electrode 13 is on the right side of the second electrode 12, and if the first difference Δx is negative, it means that the third electrode 13 is on the right side of the second electrode 12. to the left of electrode 12. In one embodiment, when the first difference Δx≧TH1, the first flag value f1 is set to 3. When the first difference Δx≦-TH1, the first flag value f1 is set to 1, and when -TH1<Δx<TH1, the first flag value f1 is set to 2.

S105: Calculate a second difference Δy between the sixth position y3 and the fifth position y2. The second difference Δy is obtained, for example, by subtracting the fifth position y2 from the sixth position y3 .

S106: Determine a second flag value f2 corresponding to the second difference Δy. In one embodiment, step S106 compares the second difference Δy with a second preset range (−TH2˜TH2) to determine a second flag value f2. The second difference Δy can be understood as the relative positional relationship between the third electrode 13 and the second electrode 12 of the stylus 100 in the second direction (such as the Y direction). If the first difference Δy is positive, it means that the third electrode 13 is above the second electrode 12 . If the first difference Δy is a negative value, it means that the third electrode 13 is below the second electrode 12 . In one embodiment, when the first difference Δy≧TH2, the second flag value f2 is set to 3. When the second difference Δy≦-TH2, the second flag f2 is set to 1, and when -TH2<Δy<TH2, the second flag f2 is set to 2. In this embodiment, the second flag value f2 represents the tilt state of the stylus 100 in the second direction.

S107: Determine the orientation information according to the first flag value f1 and the second flag value f2. In the aforementioned embodiment, the first flag value f1 and the second flag value f2 respectively have 3 possible values, and the first flag value f1 and the second flag value f2 can produce 9 combinations (f1, f2 ). Figure 12 shows the correspondence between the nine combinations (f1, f2) and orientation. Each combination (f1, f2) corresponds to an orientation. Therefore, according to the first flag value f1 and the second flag value f2, it can be determined which orientation the stylus 100 corresponds to. In the example of Figure 12, the orientation information is based on the direction of the drawing. The first direction is the horizontal direction, and its forward direction is marked as +X, and the direction of the second direction is the vertical direction, and its forward direction is marked as +Y. In different embodiments, the first direction and the second direction are not limited to the extending directions shown in FIG. 12 .

FIG. 13 provides a second embodiment of the aforementioned step S95. Figure 13 uses the sensing data shown in Figure 7 . In the embodiment shown in FIG. 7 , the second sensing information Sense_data2 includes the second group of sensing quantities X2_data and the fifth group of sensing quantities Y2_data. The third sensing information Sense_data3 includes the third group of sensing quantities X3_data and the sixth group of sensing quantities Y3_data. The contents of Figure 13 include:

S131: Perform calculations according to the second set of sensing quantities X2_data and the third set of sensing quantities X3_data to determine a first flag value f1;

S132: Perform calculations according to the fifth set of sensing quantities Y2_data and the sixth set of sensing quantities Y3_data to determine a second flag value f2;

S133: Determine the orientation information according to the first flag value f1 and the second flag value f2.

In step S131 , an embodiment of determining the first flag value f1 is shown in steps S141 to S143 of FIG. 14 . In step S132 , an embodiment of determining the second flag value f2 is shown in steps S144 to S146 of FIG. 14 . The steps shown in Figure 14 are explained below:

S141: Take the first sensing electrode 310 corresponding to the maximum value of the second group of sensing quantities X2_data as a first origin. Please refer to the schematic diagrams of FIGS. 15A-15C , the second group of sensing quantities X2_data is shown in the upper waveform, and the maximum value (peak value) of the second group of sensing quantities X2_data corresponds to the nth sensing electrode 310 . In step S141 , the nth sensing electrode 310 is used as the first origin, that is, coordinate 0 . The coordinates of the first sensing electrodes 310 on the left of the first origin are negative values, and the coordinates of the first sensing electrodes 310 on the right of the first origin are positive values.

S142: Calculate a seventh position G1 according to the first origin and the third group of sensing quantities X3_data. The seventh position G1 represents a one-dimensional coordinate relative to the first origin in the first direction. One method of calculating the one-dimensional coordinates is to divide the sum of the products of the sensing quantities of each sensing electrode 310 and their positions by the sum of the sensing quantities, and use the third set of sensing quantities X3_data and the corresponding plurality of first sensing electrodes 310, that is, the seventh position G1 can be calculated. In FIG. 15A , the seventh position G1 is a positive value and is located to the right of the first origin 0 . In FIG. 15B , the seventh position G1 is a negative value and is located to the left of the first origin 0 . In FIG. 15C , the seventh position G1 is very close to the first origin 0 .

S143: Determine the first flag value f1 corresponding to the seventh position G1. In one embodiment, step S143 compares the seventh position G1 with a third preset range (-TH3˜TH3) to obtain the first flag value f1. In one embodiment, when the seventh position G1≧TH3, the first flag value f1 is set to 3. When the seventh position G1≦-TH3, the first flag value f1 is set to 1, and when -TH3<the seventh position G1<TH3, the first flag value f1 is set to 2.

S144: Use the second sensing electrode 320 corresponding to the maximum value of the fifth group of sensing quantities Y2_data as a second origin. In this step, the maximum value (peak value) of the fifth group of sensing quantities Y2_data is determined, and the m-th sensing electrode 320 corresponding to the maximum value is used as the second origin, that is, the coordinate 0 . The coordinates of the second sensing electrodes 320 above the second origin are positive values, and the coordinates of the second sensing electrodes 320 below the second origin are negative values.

S145: Calculate an eighth position G2 according to the second origin and the sixth group of sensing quantities Y3_data. The eighth position G2 represents a one-dimensional coordinate relative to the second origin in the second direction. One method for calculating the one-dimensional coordinates is to divide the sum of the products of the sensing quantities of each sensing electrode 320 and their positions by the sum of the sensing quantities, and use the sixth set of sensing quantities Y3_data and its corresponding plurality of second sensing electrodes 320, that is, the eighth position G2 can be calculated.

S146: Determine the second flag value f2 corresponding to the eighth position G2. In one embodiment, step S146 compares the eighth position G2 with a fourth preset range (-TH4˜TH4) to obtain the second flag value f2. In one embodiment, when the eighth position G2≧TH4, the second flag value f2 is set to 3. When the eighth position G2≦-TH4, the second flag value f2 is set to 1, when

When -TH4<eighth position G2<TH4, the second flag value f2 is set to 2.

In step S131 , another embodiment of determining the first flag value f1 is shown in steps S161 to S164 of FIG. 16 . In step S132 , another embodiment of determining the second flag value f2 is shown in steps S165 to S168 of FIG. 16 . The steps shown in Figure 16 are explained below:

S161: Take the first sensing electrode 310 corresponding to the maximum value of the second group of sensing quantities X2_data as a first origin. For the content of step S161, please refer to the description of step 141 above, which will not be repeated here.

S162: According to the third group of sensing quantities X3_data, calculate a first sum of sensing quantities SUM1 on one side of the first origin and a second sum of sensing quantities SUM2 on the other side of the first origin. This step can be understood as dividing the distribution of the third group of inductive quantities X3_data into two sides with the first origin as the reference point, and calculating the third group of inductive quantities X3_data on the side of the first origin (for example, toward the first The sum of the induction quantities distributed on the positive side of the direction) to obtain the first induction quantity sum SUM1. Calculate the sum of the induction quantities distributed on the other side of the first origin (for example, the negative side of the first direction) in the third group of induction quantities X3_data to obtain the second sum of induction quantities SUM2. For example, the tenth sensing electrode 310 is determined as the first origin according to the distribution of the sensing quantity X2_data of the second group. The third group of sensing values X3_data includes sensing values of the 8th to 12th sensing electrodes 310 , which are 5, 10, 20, 30 and 8 in sequence. In this example, the first induction sum SUM1 is (30+8) equal to 38, and the second induction sum SUM2 is (5+10) equal to 15. In the third group of sensing values X3_data, the sensing value 20 of the tenth sensing electrode 310 is not included in the calculation.

S163: Calculate a third difference d3 between the first sum of induction quantities SUM1 and the second sum of induction quantities SUM2. For example, the third difference d3 is obtained by subtracting the second sum SUM2 of sensing quantities from the first sum sum SUM1 of sensing quantities.

S164: Determine the first flag value f1 corresponding to the third difference d3. In one embodiment, step S164 compares the third difference d3 with a fifth preset range (-TH5˜TH5) to determine the first flag value f1. In one embodiment, when the third difference value d3≧TH5, the value of the first flag value f1 is set to 3. When the third difference d3≦-TH5, the first flag value f1 is set to 1, and when -TH5<d3<TH5, the first flag value f1 is set to 2. In an embodiment according to step S164, if |SUM1-SUM2|<TH5, set the first flag value f1 to 2. If |SUM1-SUM2|>TH5, and SUM1>SUM2, set the first flag value f1 to 3, if |SUM1-SUM2|>TH5, and SUM1<SUM2, then set the first flag value f1 set to 1.

S165: Use the second sensing electrode 320 corresponding to the maximum value of the fifth group of sensing quantities Y2_data as a second origin. For the content of step S165, please refer to the description of step 144 above, which will not be repeated here.

S166: According to the sixth group of sensing quantities Y3_data, calculate a third sum of sensing quantities SUM3 on one side of the second origin and a fourth sum of sensing quantities SUM4 on the other side of the second origin. This step can be understood as dividing the distribution of the sixth group of inductive quantities Y3_data into two sides with the second origin as the reference point, and calculating the sixth group of inductive quantities Y3_data on the side of the second origin (for example, toward the second The sum of the induction quantities distributed on the positive side of the direction) to obtain the third sum of induction quantities SUM3. Calculate the sum of the induction quantities distributed on the other side of the second origin (for example, the side facing the negative side of the second direction) in the sixth group of induction quantities Y3_data to obtain the fourth sum of induction quantities SUM4. For example, the tenth sensing electrode 320 is determined as the second origin according to the distribution of the fifth group of sensing quantities Y2_data. The sixth group of sensing values Y3_data includes sensing values of the 8th to 12th sensing electrodes 320 , which are 5, 10, 20, 30 and 8 in sequence. In this example, the third induction quantity sum SUM3 is (30+8) equal to 38, and the fourth induction quantity sum SUM4 is (5+10) equal to 15. In the sixth group of sensing values Y3_data, the sensing value 20 of the tenth sensing electrode 320 is not included in the calculation.

S167: Calculate a fourth difference d4 between the third sum of sensing quantities SUM3 and the fourth sum of sensing quantities SUM4. For example, the fourth difference d4 is obtained by subtracting the fourth sum SUM4 of sensing quantities from the third sum sum SUM3 of sensing quantities.

S168: Determine the second flag value f2 corresponding to the fourth difference d4. In one embodiment, step S168 compares the fourth difference d4 with a sixth preset range (-TH6˜TH6) to determine the second flag value f2. In one embodiment, when the fourth difference d4≧TH6, the second flag value f2 is set to 3. When the fourth difference d4≦−TH6, the second flag value f2 is set to 1, and when −TH6<d4<TH6, the second flag value f2 is set to 2. In an embodiment according to step S168, if |SUM3−SUM4|<TH6, then set the second flag value f2 to 2. If |SUM3-SUM4|>TH6, and SUM3>SUM4, set the second flag value f2 to 3, if |SUM3-SUM4|>TH6, and SUM3<SUM4, then set the second flag value f2 set to 1.

To sum up, the second electrode and the third electrode of the stylus of the present invention can generate the second sensing information and the third sensing information on the touch device, so that the touch device can generate the second sensing information and the third sensing information according to the second sensing information and the third sensing information. The three sensing information determines an inclination angle and/or an orientation information of the stylus relative to the touch device, and the inclination angle or orientation information can provide a reference for the application program to execute a specific function.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (24)

1. A stylus for operating on a touch device, characterized in that it comprises: A pen body is provided with a first electrode, a second electrode and a third electrode in sequence along the axis of the pen body, and the second electrode is separated from the third electrode by a first distance; and A controller is located inside the pen body, and the controller simultaneously provides a first driving signal with a first frequency, a second driving signal with a second frequency, and a third driving signal with a third frequency, respectively for the first electrode, the second electrode and the third electrode, the first frequency, the second frequency and the third frequency are three different frequencies; Wherein, the second electrode and the third electrode are used for the touch device to determine a tilt angle or an orientation information of the stylus, and the first electrode is used for the touch device to determine the stylus s position. 2. The stylus according to claim 1, wherein the controller comprises: A first signal generator connected to the first electrode, the first signal generator providing the first driving signal to the first electrode; a second signal generator connected to the second electrode, the second signal generator provides the second driving signal to the second electrode; and A third signal generator is connected to the third electrode, and the third signal generator provides the third driving signal to the third electrode. 3. The touch pen according to claim 1 or 2, wherein the first electrode, the second electrode and the third electrode are ring electrodes. 4. A detection method for a stylus, characterized in that, for judging the inclination angle between the stylus and a touch device, the stylus includes a first electrode, a second electrode and a first electrode Three electrodes, the second electrode and the third electrode are separated by a first distance, and the first electrode, the second electrode and the third electrode are respectively simultaneously applied with driving signals having a first frequency, a second frequency and a third frequency , the method contains: (a) using the touch device to detect the stylus; (b) Processing the detection result of step (a), obtaining a first sensing information corresponding to the first frequency, a second sensing information corresponding to the second frequency, and a third sensing information corresponding to the third frequency ; (c) calculating the position of the stylus according to the first sensing information; (d) calculating a second two-dimensional coordinate according to the second sensing information, and calculating a third two-dimensional coordinate according to the third sensing information; (e) calculating a second distance between the second two-dimensional coordinate and the third two-dimensional coordinate; and (f) determining the inclination angle according to the first distance and the second distance. 5 . The detection method of the stylus according to claim 4 , wherein in step (f), the inclination angle is obtained by performing a trigonometric calculation according to the first distance and the second distance. 6 . 6. A detection method for a stylus, characterized in that it is used to determine the orientation information of the stylus on a touch device, and the stylus includes a first electrode, a second electrode and a third electrode. an electrode, the second electrode is separated from the third electrode by a first distance, the first electrode, the second electrode and the third electrode are respectively simultaneously applied with driving signals having a first frequency, a second frequency and a third frequency, This method contains: (a) using the touch device to detect the stylus; (b) Processing the detection result of step (a), obtaining a first induction information corresponding to the first frequency, a second induction information corresponding to the second frequency, and a third induction corresponding to the third frequency information; (c) calculating the position of the stylus according to the first sensing information; and (d) Determining an orientation information according to the second sensing information and the third sensing information. 7. The detection method of the stylus according to claim 6, characterized in that step (d) comprises: calculating a second position in a first direction and a fifth position in a second direction of the touch device according to the second sensing information; calculating a third position in the first direction and a sixth position in the second direction according to the third sensing information; calculating a first difference between the third location and the second location; determining a first flag value corresponding to the first difference; calculating a second difference between the sixth position and the fifth position; determining a second flag value corresponding to the second difference; and The orientation information is determined according to the first flag value and the second flag value. 8. The detection method of the stylus according to claim 7, wherein the step of determining the first flag corresponding to the first difference comprises: comparing the first difference with a first preset range comparing to determine the first flag value; The step of determining a second flag corresponding to the second difference includes: comparing the second difference with a second preset range to determine the second flag. 9. The detection method of a stylus according to claim 6, wherein the touch device comprises a plurality of first sensing electrodes arranged along a first direction and a plurality of second sensing electrodes arranged along a second direction Sensing electrodes, the second sensing information includes the second group of sensing quantities of the plurality of first sensing electrodes and the fifth group of sensing quantities of the plurality of second sensing electrodes, the third sensing information includes the plurality of first sensing The third group of sensing quantities of the electrodes and the sixth group of sensing quantities of the plurality of second sensing electrodes; Wherein, the step (d) includes: calculating a first flag value according to the second group of sensing quantities and the third group of sensing quantities; calculating a second flag value according to the fifth group of sensing quantities and the sixth group of sensing quantities; The orientation information is determined according to the first flag value and the second flag value. 10. The detection method of the stylus according to claim 9, wherein the step of determining the first flag value comprises: Taking the first sensing electrode corresponding to the maximum value of the second group of sensing quantities as a first origin; calculating a seventh position according to the first origin and the third set of sensing quantities; and judging the first flag value corresponding to the seventh position; The step of determining the second flag value includes: Taking the second sensing electrode corresponding to the maximum value of the fifth group of sensing quantities as a second origin; calculating an eighth position according to the second origin and the sixth set of sensing quantities; and Determine the second flag value corresponding to the eighth position. 11. The detection method of a stylus according to claim 10, wherein the step of determining the first flag value corresponding to the seventh position comprises: comparing the seventh position with a third preset range compare to obtain the first flag value; The step of determining the second flag value corresponding to the eighth position includes: comparing the eighth position with a fourth preset range value to obtain the second flag value. 12. The detection method of the stylus according to claim 9, wherein the step of determining the first flag value comprises: Taking the first sensing electrode corresponding to the maximum value of the second group of sensing quantities as a first origin; calculating a first sum of inductions on one side of the first origin and a second sum of inductions on the other side of the first origin of the third set of inductions; and calculating a third difference between the first sum of sensing quantities and the second sum of sensing quantities; judging the first flag value corresponding to the third difference; The step of determining the second flag value includes: Taking the second sensing electrode corresponding to the maximum value of the fifth group of sensing quantities as a second origin; calculating a third sum of sensing quantities on one side of the second origin and a fourth sum of sensing quantities on the other side of the second origin of the sixth group of sensing quantities; calculating a fourth difference between the third sum of sensing quantities and the fourth sum of sensing quantities; and Determine the second flag value corresponding to the fourth difference. 13. The detection method of a stylus according to claim 12, wherein the step of determining the first flag value corresponding to the third difference comprises: combining the third difference with a fifth preset range to determine the first flag value; the step of judging the second flag value corresponding to the fourth difference includes: comparing the fourth difference with a sixth preset range to determine The second flag value. 14. A touch control system, characterized in that it comprises: A stylus, including: A pen body is provided with a first electrode, a second electrode and a third electrode in sequence along the axis of the pen body, and the second electrode is separated from the third electrode by a first distance; and a controller located inside the pen body, the controller simultaneously provides a first driving signal with a first frequency, a second driving signal with a second frequency, and a third driving signal with a third frequency, respectively for the first electrode, the second electrode and the third electrode, the first frequency, the second frequency and the third frequency are three different frequencies; and A touch device for detecting the stylus and processing the detection result to obtain a first sensing information corresponding to the first frequency, a second sensing information corresponding to the second frequency and a sensing information corresponding to the third frequency A third sensing information, the touch device performs calculations according to the second sensing information and the third sensing information to determine the tilt angle or orientation information of the touch pen, and calculate the position of the touch pen according to the first sensing information Location. 15. The touch control system according to claim 14, wherein the touch device calculates a second two-dimensional coordinate according to the second sensing information, and calculates a third two-dimensional coordinate according to the third sensing information The touch device determines the inclination angle according to the first distance and a second distance between the second two-dimensional coordinates and the third two-dimensional coordinates. 16. The touch control system according to claim 14, the touch device calculates a second position in a first direction and a fifth position in a second direction according to the second sensing information, according to the second Three sensing information to calculate a third position in the first direction and a sixth position in the second direction, wherein the touch device is based on a first difference between the third position and the second position judging a corresponding first flag value, judging a corresponding second flag value according to a second difference between the sixth position and the fifth position, and judging a corresponding second flag value according to the first flag value and the second The value of the flag determines the orientation information. 17. The touch system according to claim 16, wherein the touch device compares the first difference with a first preset range to determine the first flag value, and the second difference The value is compared with a second predetermined range to determine the second flag value. 18. The touch system according to claim 14, wherein the touch device comprises a plurality of first sensing electrodes arranged along a first direction and a plurality of second sensing electrodes arranged along a second direction , the second sensing information includes the second group of sensing quantities of the plurality of first sensing electrodes and the fifth group of sensing quantities of the plurality of second sensing electrodes, the third sensing information includes the plurality of first sensing electrodes The third set of sensing quantities and the sixth set of sensing quantities of the plurality of second sensing electrodes; the touch device performs calculations based on the second set of sensing quantities and the third set of sensing quantities to determine a first flag, according to the The fifth group of sensing quantities and the sixth group of sensing quantities are calculated to determine a second flag, and the orientation information is determined according to the first flag and the second flag. 19. The touch control system according to claim 18, wherein the touch device uses the first sensing electrode corresponding to the maximum value of the second group of sensing values as a first origin, and according to the first The origin and the third set of sensing quantities calculate a seventh position to determine the first flag value corresponding to the seventh position; the touch device uses the second flag corresponding to the maximum value of the fifth set of sensing quantities The sensing electrode is a second origin, and an eighth position is calculated according to the second origin and the sixth group of sensing quantities, so as to determine the second flag value corresponding to the eighth position. 20. The touch system according to claim 19, wherein the touch device compares the seventh position with a third preset range to obtain the first flag value, and the eighth position Compared with a fourth preset range value to obtain the second flag value. 21. The touch system according to claim 18, wherein the touch device uses the first sensing electrode corresponding to the maximum value of the second group of sensing values as a first origin to calculate the third A sum of a first induction quantity on one side of the first origin and a second sum of induction quantities on the other side of the first origin of the group of induction quantities, and calculating the sum of the first induction quantity and the second sum of induction quantities a third difference between them, and determine the first flag value corresponding to the third difference; and The touch device takes the second sensing electrode corresponding to the maximum value of the fifth group of sensing values as a second origin, and calculates the sum of a third sensing value of the sixth group of sensing values on the side of the second origin and A fourth sum of sensing quantities on the other side of the second origin, calculate a fourth difference between the third sum of sensing quantities and the fourth sum of sensing quantities, and determine the corresponding value of the fourth difference Second flag value. 22. The touch system according to claim 21, wherein the touch device compares the third difference with a fifth preset range to determine the first flag value, and the fourth difference The value is compared with a sixth predetermined range to determine the second flag value. 23. The touch control system according to claim 14, wherein the controller comprises: A first signal generator connected to the first electrode, the first signal generator providing the first driving signal to the first electrode; a second signal generator connected to the second electrode, the second signal generator provides the second driving signal to the second electrode; and A third signal generator is connected to the third electrode, and the third signal generator provides the third driving signal to the third electrode. 24. The touch control system according to claim 14, wherein the first electrode, the second electrode and the third electrode are ring electrodes.