WO2022014160A1 - Gesture identifying device - Google Patents

Gesture identifying device Download PDF

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Publication number
WO2022014160A1
WO2022014160A1 PCT/JP2021/019519 JP2021019519W WO2022014160A1 WO 2022014160 A1 WO2022014160 A1 WO 2022014160A1 JP 2021019519 W JP2021019519 W JP 2021019519W WO 2022014160 A1 WO2022014160 A1 WO 2022014160A1
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WO
WIPO (PCT)
Prior art keywords
capacitances
gesture
electrodes
threshold value
determination unit
Prior art date
Application number
PCT/JP2021/019519
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French (fr)
Japanese (ja)
Inventor
智 中嶋
哲 早坂
耕平 北川
翔太郎 田中
卓哉 用品
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アルプスアルパイン株式会社
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Publication of WO2022014160A1 publication Critical patent/WO2022014160A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present invention relates to a gesture determination device.
  • two or more detection electrode / drive electrode pairs provided at the detection position of the device main body and the device main body and forming a capacitance between the detection electrode and the drive electrode, and the two or more detection electrodes / Capacitive motion including a detection means for detecting the motion of the object to be detected from the amount of change in capacitance obtained for each drive electrode pair and a switching means for switching the connection to the detection electrode / drive electrode pair.
  • a detector There is a detector.
  • a display device is provided in the region surrounded by the two or more detection electrode / drive electrode pairs (see, for example, Patent Document 1).
  • the display device since the display device is provided in the region surrounded by two or more detection electrodes / drive electrode pairs, the region surrounded by two or more detection electrodes / drive electrode pairs is provided. It does not disclose that it will be miniaturized.
  • the purpose is to provide a gesture judgment device that can cope with miniaturization.
  • the gesture determination device of the embodiment of the present invention includes a plurality of electrodes provided in parallel on a wiring plate, a measurement circuit for measuring a plurality of capacitances via each of the plurality of electrodes, and the measured one.
  • the determination unit includes a determination unit that determines the gesture of the object to be detected from a plurality of capacitances, and the determination unit includes the plurality of determination units when any one of the plurality of capacitances becomes the first threshold value or more.
  • the gesture of the object to be detected is determined from the capacitance and the plurality of capacitances when all the capacitances are equal to or less than the first threshold and less than the second threshold.
  • FIG. 1 is a diagram showing a gesture determination device 100 of an embodiment.
  • the XYZ coordinate system will be defined and described.
  • the plan view is an XY plane view, and for convenience of explanation, the ⁇ Z direction side is referred to as a lower side or a lower side, and the + Z direction side is referred to as an upper side or an upper side. is not it.
  • the gesture determination device 100 includes a wiring board 10, electrodes 110A, 111A, 112A, 113A, and a gesture detection unit 120.
  • the configuration of the gesture determination device 100 will be described with reference to FIG. 2 in addition to FIG.
  • FIG. 2 is a diagram showing the arrangement of electrodes 110A, 111A, 112A, 113A.
  • the wiring board 10 is a sheet made of an insulator having a rectangular shape in a plan view having a longitudinal direction in the X direction.
  • the wiring board 10 may be a wiring board. Further, the wiring board 10 has a rectangular shape in a plan view.
  • the wiring board 10 does not have to be rectangular in a plan view, but if it is not rectangular, it may have a rectangular area as shown as the wiring board 10 in FIG.
  • the electrodes 110A to 113A are made of metal such as copper or aluminum as an example, and are formed on the upper surface of the wiring board 10.
  • the electrodes 110A to 113A are arranged along the four sides of the wiring board 10 so as to surround the central rectangular region 11 on the upper surface of the wiring board 10.
  • the electrode 110A is located on the + Y direction side of the region 11, the electrode 111A is located on the ⁇ Y direction side of the region 11, the electrode 112A is located on the ⁇ X direction side of the region 11, and the electrode 113A is located on the + X direction side of the region 11. Is located in.
  • the electrodes 110A to 113A are examples of a plurality of electrodes provided in parallel on the wiring board 10. Specifically, the electrode 110A and the electrode 111A face each other and are parallel to each other. The electrode 112A and the electrode 113A face each other and are parallel to each other. The electrodes 110A and 111A are both rectangular electrodes having a longitudinal direction parallel to the X axis. The electrodes 112A and 113A are both rectangular electrodes having a longitudinal direction parallel to the Y axis. The electrodes 110A to 113A are provided at positions corresponding to the four sides of a rectangle similar to the wiring board 10 and slightly smaller than the wiring board 10. This is to enable detection of gestures in the + X direction (right direction), the ⁇ X direction (left direction), the + Y direction (front direction), and the ⁇ Y direction (rear direction).
  • the electrodes 110A and 111A have the same position in the X direction and the same size as each other.
  • the electrodes 112A and 113A have equal positions in the Y direction and are of equal size to each other.
  • the electrode 110A and the electrode 112A do not have an overlapping section in the X direction and do not have an overlapping section in the Y direction.
  • the electrode 110A and the electrode 113A do not have overlapping sections in the X direction and the Y direction.
  • the electrode 111A and the electrode 112A do not have an overlapping section in either the X direction or the Y direction.
  • the electrode 111A and the electrode 113A do not have an overlapping section in either the X direction or the Y direction.
  • the electrodes 110A, 111A, 112A, and 113A are not provided inside the central region 11 of the wiring board 10 and the corner regions 12 at the four corners. Since the electrodes 110A to 113A are not provided in the corner regions 12 of the four corners, even if an oblique gesture is performed, it is possible to accurately determine whether the oblique gesture is the X-direction or the Y-direction gesture. Can be detected.
  • the electrodes 110A to 113A are used, for example, for measuring the capacitance generated between the user's hand and the user's hand by the self-capacitance method.
  • the gesture determination device 100 is a device in which the determination unit determines the gesture of the user's hand based on the capacitance measured by the measurement circuit 121 of the gesture detection unit 120 via each of the electrodes 110A to 113A.
  • the user's hand is an example of the object to be detected, but the object to be detected is not limited to the user's hand, but may be a foot, a leg, or a conductive object (for example, a metal rod) held by the user. You may.
  • the electrodes 110A, 111A, 112A, and 113A are not particularly distinguished, they are simply referred to as electrodes 110.
  • the gesture detection unit 120 has a measurement circuit 121, a determination unit 122, a memory 123, and a switching circuit 124.
  • the measurement circuit 121, the determination unit 122, and the memory 123 include a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an input / output interface, an internal bus, and the like. It is realized by the including computer 120A.
  • the measurement circuit 121 and the determination unit 122 show the function of the program executed by the computer 120A as a functional block. Further, the memory 123 functionally represents the memory of the computer 120A.
  • the measurement circuit 121, the determination unit 122, and the memory 123 are connected so as to be capable of data communication by a bus or the like inside the computer 120A. Further, the measurement circuit 121 is connected to an external switching circuit 124 of the computer 120A.
  • the measuring circuit 121 measures each capacitance of the electrodes 110A to 113A.
  • the measurement circuit 121 is a well-known circuit that detects the proximity of the hand H by utilizing the fact that the capacitance of the electrode changes when the hand H approaches the electrodes 110A to 113A. Since the capacitance cannot be measured directly, the current and voltage are measured and the capacitance is calculated.
  • the measuring circuit 121 is a measurement value obtained by measuring a plurality of times in a time series via each of the electrodes 110A to 113A when the four measured values measured via each of the electrodes 110A to 113A are less than the detection threshold value. The average value is obtained for each of the electrodes 110A to 113A. Then, the measuring circuit 121 sets the obtained average value as a reference value when measuring the capacitance for each of the electrodes 110A to 113A.
  • the detection threshold is the upper limit of the measured value measured when the object to be detected is not nearby, and is preset and stored in the memory 123.
  • the detection threshold value may be a common value for the electrodes 110A to 113A, or may be set separately for each of the electrodes 110A to 113A.
  • the reference value is a value obtained separately and independently for the electrodes 110A to 113A, and is an average of the measured values measured by the measuring circuit 121 on the electrodes 110A to 113A in a state where the hand H is not present near the electrodes 110A to 113A. be.
  • the reference value is used to eliminate the influence of noise and the like.
  • the measuring circuit 121 outputs a value obtained by subtracting the reference value from the obtained measured values as each capacitance of the electrodes 110A to 113A.
  • the difference between the measured value measured for each of the electrodes 110A to 113A and the reference value is calculated as the capacitances C0, C1, C2, and C3, respectively.
  • the values calculated from the difference between the measured value and the reference value are referred to as capacitances C0, C1, C2, and C3.
  • C0, C1, C2, and C3 are changes in capacitance with respect to the reference value.
  • the determination unit 122 determines the gesture (type) based on the capacitances C0, C1, C2, and C3 obtained from the measurement circuit 121. The conditions for the determination unit 122 to determine the gesture and the specific determination method will be described later with reference to FIGS. 3 and 4.
  • the memory 123 stores programs and data executed by the computer 120A. Therefore, the capacitances C0, C1, C2, C3 obtained from the measurement circuit 121 and the gesture determination result by the determination unit 122 are also stored in the memory 123.
  • the switching circuit 124 is a multiplexer that switches the connection between the electrodes 110A to 113A and the measuring circuit 121.
  • 3 and 4 are diagrams illustrating a method by which the gesture determination device 100 determines a gesture.
  • the gesture means that the user of the gesture determination device 100 inputs a command to the gesture determination device 100 by hand gesture or the like without touching the electrodes 110A to 113A.
  • the gesture determination device 100 determines the gesture of the user.
  • the user passes through the inside of the electrodes 110A to 113A from the outside ⁇ X direction side of the electrodes 110A to 113A to the + X direction side of the electrodes 110A to 113A.
  • the user can perform a gesture of waving his / her hand to the left in the direction opposite to the gesture shown in FIG. 3 in the X direction.
  • the user passes through the inside of the electrodes 110A to 113A from the outside ⁇ Y direction side of the electrodes 110A to 113A to the + Y direction side of the electrodes 110A to 113A.
  • the user can perform a gesture of waving his / her hand in the direction opposite to the gesture shown in FIG. 4 in the Y direction.
  • the determination unit 122 of the gesture determination device 100 determines all of the gestures waving to the right, the gestures waving to the left, the gestures waving forward, and the gestures waving backward, and determines the gesture. judge.
  • the determination unit 122 determines that the hand H is approaching from the outside of the electrodes 110A to 113A in a plan view when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more. Then, the capacitances C0, C1, C2, and C3 at that time are stored in the memory 123.
  • the first threshold value TH1 is larger than the detection threshold value, and is a value for determining whether or not the hand H is in a state of approaching the electrodes 110A to 113A to some extent.
  • all of the capacitances C0, C1, C2, and C3 are equal to or less than the first threshold value TH1.
  • the first threshold value TH1 For example, when the hand H approaches the electrode 112A from the ⁇ X direction side as shown in FIG. 3, the value of the capacitance C2 measured by the measuring circuit 121 via the electrode 1102A is first from the first threshold value TH1. Will also grow.
  • the value of the capacitance C1 measured by the measuring circuit 121 via the electrode 111A first becomes higher than the first threshold value TH1. Will also grow.
  • the determination unit 122 after any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, all of the capacitances C0, C1, C2, and C3 have the first threshold value.
  • the second threshold value TH2 is a value equal to or less than the first threshold value TH1.
  • the first threshold value TH1 and the second threshold value TH2 may have the same value. In a noisy environment, erroneous detection can be suppressed by setting the second threshold value to less than the first threshold value. Making the second threshold value TH2 when advancing smaller than the first threshold value TH1 when entering is a well-known technique in electric circuits and software as a so-called chattering prevention measure.
  • the positions where the capacitances C0, C1, C2, and C3 become the first threshold value TH1 when the object to be detected moves at a certain height are indicated by 110A1 to 113A1 in FIG. Therefore, when only one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, the detected object is located at the contour 115A1 of the figure in which 110A1 to 113A1 are combined. This position is used as the approach coordinates (Xin, Yin) for gesture judgment.
  • the detected object is a figure obtained by combining 110A1 to 113A1. It is located just outside the contour 115A1. A region 110A1 in which the capacitance C0 becomes the second threshold value TH2 or more and a region in which the capacitance C1 becomes the second threshold value TH2 or more when the object to be detected is moved at the upper limit height at which the gesture operation should be detected. It is designed to overlap with 111A1.
  • At the height at which the gesture operation is detected at least one of the capacitances C0, C1, C2, and C3 inside the contour 115A1 becomes the second threshold value TH2 or more. That is, when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value TH2, the detected object is located outside the contour 115A1.
  • any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, all the capacitances C0, C1, C2, and C3 are designed to be equal to or higher than the detection threshold value. do.
  • any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, all the capacitances C0, C1, C2, and C3 can be measured.
  • all of the capacitances C0, C1, C2 and C3 are less than the second threshold value TH2, all the capacitances C0, C1, C2 and C3 are designed to be equal to or more than the detection threshold value. Therefore, when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value TH2, all the capacitances C0, C1, C2, and C3 can be measured.
  • the object to be detected is located on the contour 115A1, all the capacitances C0, C1, C2, and C3 can be measured. Therefore, when the detected body is located on the contour 115A1, the position of the detected body can be specified. Since the gesture is determined using the two points on the contour 115A1, the first threshold value TH1 and the second threshold value TH2 are set so that the contour 115A1 fits within the range in which the hand H is moved by the gesture.
  • the determination unit 122 includes the capacitances C0, C1, C2, and C3 when any one of the capacitances C0, C1, C2, and C3 becomes equal to or higher than the first threshold value TH1, and all the capacitances C0. , C1, C2, C3 are less than the second threshold, and the capacitances C0, C1, C2, and C3 are used to determine the gesture of the hand H. More specifically, the determination unit 122 determines the gesture as follows.
  • the determination unit 122 uses the capacitances C0, C1, C2, and C3 as the capacitances C0, C1, C2, and C3 when any one of the capacitances C0, C1, C2, and C3 becomes equal to or higher than the first threshold value TH1. It is stored in the memory 123 as Cin2 and Cin3. Capacitances Cin0, Cin1, Cin2, and Cin3 are set in the memory 123 in order to obtain the approach coordinates when the hand H approaches from a position away from the electrodes 110A to 113A and approaches any of the electrodes 110A to 113A. Store. The approach coordinates are the coordinates when entering the contour 115A1 of FIG.
  • the region surrounded by the electrodes 110A to 113A is a region in which the region 11 and the region in which the electrodes 110A to 113A exist are combined, and is a region surrounded by the outer edges of the electrodes 110A to 113A in a plan view. ..
  • the determination unit 122 enters when the hand H approaches any of the electrodes 110A to 113A based on the capacitances Cin0, Cin1, Cin2, Cin3 stored in the memory 123 and the following equation (1).
  • (Xin, Yin) (Cin3 / (Cin3 + Cin2), Cin0 / (Cin0 + Cin1)) (1)
  • the electrodes 112A and 113A are arranged on both sides of the electrodes 110A to 113A in the X direction, and the electrodes 110A and 111A are arranged on both sides of the electrodes 110A to 113A in the Y direction. It is assumed that the region surrounded by the electrodes 110A to 113A is entered across the electrodes 112A or 113A in the X direction, and is assumed to enter across the electrodes 110A or 111A in the Y direction. If it straddles the electrodes 112A or 113A, it may be a gesture that moves the hand H diagonally with respect to the X direction, and if it straddles the electrodes 110A or 111A, the hand may move diagonally with respect to the Y direction. It may be a gesture that moves H.
  • the X coordinate of the approach coordinate is obtained by the ratio of the capacitance Cin3 to the sum of the capacitances Cin2 and Cin3 obtained from the electrodes 112A and 113A, and the capacitances Cin0 and Cin1 obtained from the electrodes 110A and 111A are obtained. It is an equation to obtain the Y coordinate by the ratio of the capacitance Cin0 to the sum of.
  • the numerator for the X coordinate is set to the capacitance Cin3 because it is based on the + X direction, and the molecule for the Y coordinate is set to the capacitance Cin0 based on the + Y direction. Because.
  • the approach coordinates (Xin, Yin) are obtained as the coordinates of points outside the region surrounded by the electrodes 110A to 113A.
  • the approach coordinates are obtained as the coordinates of points outside the region surrounded by the electrodes 110A to 113A.
  • the approach coordinates are the region outside the region surrounded by the electrodes 110A to 113A.
  • the determination unit 122 has advance coordinates (Xout) in which the hand H is separated from any of the electrodes 110A to 113A based on the capacitances Cout0, Cout1, Cout2, and Cout3 stored in the memory 123 and the following equation (2).
  • Xout (Cout3 / (Cout3 + Cout2), Cout0 / (Cout0 + Cout1)) (2)
  • the capacitances C0, C1, C2, and C3 are inside the contour where the capacitances C0, C1, C2, and C3 become the first threshold value TH1. It will always be the second threshold TH2 or higher. Therefore, the advance coordinates (Xout, Youout) are outside the region surrounded by the electrodes 110A to 113A. The advance from the inside to the outside of the region surrounded by the electrodes 110A to 113A is assumed to advance across the electrodes 112A or 113A in the X direction, and to advance across the electrodes 110A or 111A in the Y direction. I'm assuming. Therefore, the formula (2) has the same configuration as the formula (1), and the capacitances Cin0, Cin1, Cin2, and Cin3 of the formula (1) are replaced with the capacitances Cout0, Cout1, Cout2, and Cout3. Has a configuration.
  • the determination unit 122 determines that the gesture is in the forward direction if the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin and the value obtained by Youout-Yin is 0 or more. This is a gesture in the Y direction because the difference between the input coordinates and the output coordinates in the Y direction is larger than that in the X direction. Further, since Yin and Yout in the formulas (1) and (2) are expressed with reference to the + Y direction using C0 as the molecule, when Yout is Yin or more, the value of Yin is relatively small. This is the case when the value of Yout is relatively large. Corresponding to such a case is a gesture from the electrode 111A to the electrode 110A. Therefore, the determination unit 122 determines that the direction is forward.
  • the determination unit 122 determines that the gesture is in the backward direction unless the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin and the value of Youout-Yin is not 0 or more. Since the difference between the input coordinate and the output coordinate in the Y direction is larger than that in the X direction, it is a gesture in the Y direction, and it is a gesture from the electrode 110A to the electrode 111 that the Youout is less than Yin. Therefore, the determination unit 122 determines that the direction is backward.
  • the determination unit 122 determines that the gesture is in the right direction. This is a gesture in the X direction because the difference between the input coordinates and the output coordinates in the Y direction is smaller than that in the X direction. Further, since Xin and Xout in the formulas (1) and (2) are expressed with reference to the + X direction using C3 as the molecule, when Xout is Xin or more, the value of Xin is relatively small. This is the case when the value of Xout is relatively large. Corresponding to such a case is a gesture from the electrode 112A to the electrode 113A. Therefore, the determination unit 122 determines that the direction is to the right.
  • the determination unit 122 determines that the gesture is in the left direction if the absolute value of Xout-Xin is not equal to or less than the absolute value of Yout-Yin and the value of Xout-Xin is not 0 or more. Since the difference between the input coordinate and the output coordinate in the Y direction is smaller than that in the X direction, it is a gesture in the X direction, and it is a gesture from the electrode 113A to the electrode 112A that Xout is less than Xin. Therefore, the determination unit 122 determines that the direction is to the left.
  • FIG. 5 is a flowchart showing a process executed by the computer 120A.
  • the process shown in FIG. 5 starts when one or more of the capacitances of the electrodes 110A to 113A becomes equal to or higher than the detection threshold value. At the time of starting, all the capacitances C0 to C3 are less than the first threshold value TH1.
  • the measurement circuit 121 calculates the capacitances C0 to C3 (step S1).
  • the capacitances C0 to C3 are stored in the memory 123.
  • the determination unit 122 determines whether or not any one of the capacitances C0 to C3 calculated in step S1 is equal to or higher than the first threshold value TH1 (step S2). This is to determine whether or not the approach coordinates can be obtained.
  • step S3 When the determination unit 122 determines that any one of the capacitances C0 to C3 calculated in step S1 is equal to or higher than the first threshold value TH1 (S2: YES), the determination unit 122 determines that the capacitance C0 determined in step S2. ⁇ C3 are set to the capacitances Cin0 to Cin3, respectively (step S3).
  • the measurement circuit 121 calculates the capacitances C0 to C3 (step S4).
  • the capacitances C0 to C3 are stored in the memory 123.
  • the determination unit 122 determines whether or not all of the capacitances C0 to C3 calculated in step S4 are less than the second threshold value TH2 (step S5). This is to determine whether or not the advance coordinates can be obtained.
  • the determination unit 122 determines that all of the capacitances C0 to C3 calculated in step S4 are less than the second threshold value TH2 (S5: YES), the determination unit 122 determines the capacitances C0 to C3 calculated in step S4, respectively. Capacitances are set to Cout0 to Cout3 (step S6).
  • the determination unit 122 substitutes the capacitances Cin0 to Cin3 into the equation (1) to obtain the advance coordinates (Xin, Yin) (step S7).
  • the determination unit 122 substitutes the capacitances Cout0 to Cout3 into the equation (2) to obtain the advance coordinates (Xin, Yin) (step S8).
  • the determination unit 122 determines whether or not the gesture is appropriate based on the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) (step S9).
  • a suitable gesture is, for example, when both the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) are outside the region surrounded by the electrodes 110A-113A. In this case, if at least one of them is in the area, the determination unit 122 determines that the gesture is not appropriate.
  • the approach coordinates (Xin, Yin) are within the region.
  • the determination unit 122 determines that the gesture is not appropriate. Further, when the hand H is pulled back to the upper side (+ Z direction side) of the region surrounded by the electrodes 110A to 113A, the advance coordinates (Xout, Youout) become within the region. The determination unit 122 also determines that the gesture is not appropriate in such a case.
  • the determination unit 122 may determine that the gesture is not appropriate. In this case, the determination unit 122 is not an appropriate gesture only for gestures in which the hand H is brought closer from above the region surrounded by the electrodes 110A to 113A (+ Z direction side) and the hand H is pulled back upward. judge.
  • the gesture that does not pass through the region surrounded by the electrodes 110A to 113A is appropriate. You may judge that it is not a good gesture. In this case, when a gesture that blurs diagonally without entering the inside of the region surrounded by the electrodes 110A to 113A is performed, it is treated as an inappropriate gesture in order to suppress erroneous detection.
  • step S9 the determination unit 122 may determine that the gesture is not appropriate when it corresponds to at least one of the above-mentioned inappropriate gestures.
  • the inappropriate gesture to be determined in step S9 does not have to be all the inappropriate gestures described above, and at least one may be set.
  • step S9 determines whether the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin (step S10). This is to determine whether it is in the front-back direction or the lateral direction.
  • the determination unit 122 determines whether or not the value obtained by Youout-Yin is 0 or more (step S11). ..
  • step S12 If the determination unit 122 determines that the value obtained by Youout-Yin is 0 or more (S11: YES), it determines that the gesture is in the forward direction (step S12).
  • step S13 determines that the gesture is in the backward direction (step S13).
  • step S10 determines in step S10 that the absolute value of Xout-Xin is not equal to or less than the absolute value of Yout-Yin (S10: NO), it determines whether or not the value obtained by Xout-Xin is 0 or more. Determination (step S14). This is to determine which direction the gesture is in, left or right.
  • the determination unit 122 determines that the value obtained by Xout-Xin is 0 or more (S14: YES), it determines that the gesture is in the right direction (step S15).
  • step S14 determines in step S14 that the value obtained by Xout-Xin is not 0 or more (S14: NO), it determines that the gesture is in the left direction (step S16). This completes a series of processes.
  • the determination unit 122 is an approach obtained from the capacitances Cin0, Cin1, Cin2, and Cin3 when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more. Coordinates (Xin, Yin) and advance coordinates (Xout, Yout) obtained from the capacitances Cout0, Cout1, Cout2, and Cout3 when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value. From, the gesture of the hand H is determined. Then, such a gesture determination can be realized by using the electrodes 110A to 113A arranged around the region 11.
  • the size of the area for detecting gestures is equal to the size of the area for detecting gestures using the touchpad, the area where the electrodes 110A to 113A are arranged can be made smaller than the touchpad. .. Further, since the number of electrodes is smaller than that of the touch pad, larger electrodes 110A to 113A can be used, so that the gesture detection sensitivity can be improved. If the detection sensitivity is high, the size can be further reduced.
  • the determination unit 122 determines the direction of the gesture using the equations (1) and (2).
  • Equations (1) and (2) are equations capable of measuring the approach coordinates and the advance coordinates outside the region surrounded by the electrodes 110A to 113A with high accuracy. Therefore, the determination unit 122 can accurately determine the direction of the gesture.
  • the determination unit 122 averages the values measured a plurality of times by the measurement circuit 121 for each of the electrodes 110A to 113A when all of the capacitances C0 to C3 measured by the measurement circuit 121 are less than the detection threshold.
  • a value may be obtained, and an average value for each of the electrodes 110A to 113A may be set in the measurement circuit 121 as a reference value when measuring the capacitances C0 to C3 for each of the electrodes 110A to 113A by the measurement circuit 121.
  • the reference value set in the measuring circuit 121 for each of the electrodes 110A to 113A is updated. Can be done.
  • the capacitance obtained from the electrodes 110A to 113A varies depending on the temperature, changes in the surrounding environment, etc., and is therefore a reference.
  • the capacitances C0 to C3 can be measured with higher accuracy. As a result, the gesture can be determined with high accuracy.
  • the gesture determination device 100 includes four electrodes 110A to 113A has been described, but the number of electrodes may be at least two and may be more than four.
  • the computer 120A of the gesture determination device 100 has the determination unit 122 for executing the determination process included in the flowchart as shown in FIG. 5, the determination by machine learning may be used.
  • FIG. 6 is a diagram showing a gesture determination device 100M according to a modified example of the embodiment.
  • the gesture determination device 100M is different from the gesture determination device 100 shown in FIG. 1 in that the gesture detection unit 120 has the determination unit 122M instead of the determination unit 122.
  • Other configurations are the same as those of the gesture determination device 100. Therefore, only the differences will be described.
  • the determination unit 122M includes the approach coordinates (Xin, Yin) obtained from the capacitances C0 to C3 when any one of the capacitances C0 to C3 becomes the first threshold value TH1 or more, and all the static electricity. It has a determination tree in which the advance coordinates (Xout, Youout) obtained from the capacitances C0 to C3 when the capacitances C0 to C3 become less than the second threshold value TH2 are input and the gesture type is output. The output result of the decision tree is the same as the determination result of the determination unit 122.
  • FIG. 7 is a flowchart showing a process executed by the computer 120A of the gesture determination device 100M. Steps S1 to S8 of the processes shown in FIG. 7 are the same as steps S1 to S8 shown in FIG.
  • the determination unit 122M inputs the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) into the decision tree, and outputs the gesture type (step S9M).
  • the gesture is determined by the process of step S9M.
  • the determination unit 122M is an approach obtained from the capacitances Cin0, Cin1, Cin2, and Cin3 when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more. Coordinates (Xin, Yin) and advance coordinates (Xout, Yout) obtained from the capacitances Cout0, Cout1, Cout2, and Cout3 when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value. From, the gesture of the hand H is determined. The output of the determination unit 122M represents the determination result of the gesture performed by the user H, and the gesture as intended by the user is determined.
  • Such a gesture determination can be realized by using the electrodes 110A to 113A arranged around the region 11.
  • the gesture is judged at a position outside the region 11. Therefore, the gesture determination device 100M can be made smaller than the size of the region for detecting the gesture. Therefore, it is possible to provide the gesture determination device 100M that can cope with miniaturization.
  • gesture determination device according to the exemplary embodiment of the present invention has been described above, the present invention is not limited to the specifically disclosed embodiments and can be various without departing from the scope of claims. Can be transformed or changed.

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Abstract

Provided is a gesture identifying device suitable for miniaturization.　A gesture identifying device includes a plurality of electrodes provided in parallel on a wiring board, a measuring circuit for measuring a plurality of capacitances via the plurality of electrodes, and an identifying unit for identifying the gesture of a subject from the measured plurality of capacitances. The identifying unit identifies the gesture of the subject from the plurality of capacitances when any one of the plurality of capacitances is equal to or higher than a first threshold and the plurality of capacitances when all the capacitances are equal to or lower than the first threshold and are lower than a second threshold.

Description

ジェスチャ判定装置Gesture judgment device
　本発明は、ジェスチャ判定装置に関する。 The present invention relates to a gesture determination device.
　従来より、装置本体と、前記装置本体の検出位置に設けられ、検出電極と駆動電極との間で静電容量を形成する２以上の検出電極／駆動電極対と、前記２以上の検出電極／駆動電極対でそれぞれ求められた静電容量の変化量から被検出体のモーション検出を行う検出手段と、前記検出電極／駆動電極対に対する接続を切り替える切り替え手段と、を具備する静電容量式モーション検出装置がある。前記２以上の検出電極／駆動電極対で囲まれた領域には表示装置が設けられている（例えば、特許文献１参照）。 Conventionally, two or more detection electrode / drive electrode pairs provided at the detection position of the device main body and the device main body and forming a capacitance between the detection electrode and the drive electrode, and the two or more detection electrodes / Capacitive motion including a detection means for detecting the motion of the object to be detected from the amount of change in capacitance obtained for each drive electrode pair and a switching means for switching the connection to the detection electrode / drive electrode pair. There is a detector. A display device is provided in the region surrounded by the two or more detection electrode / drive electrode pairs (see, for example, Patent Document 1).
国際公開第２００８／０９３６８３号International Publication No. 2008/093683
　ところで、静電容量式モーション検出装置は、２以上の検出電極／駆動電極対で囲まれた領域に表示装置が設けられているため、２以上の検出電極／駆動電極対で囲まれた領域を小形化することは開示していない。 By the way, in the capacitance type motion detection device, since the display device is provided in the region surrounded by two or more detection electrodes / drive electrode pairs, the region surrounded by two or more detection electrodes / drive electrode pairs is provided. It does not disclose that it will be miniaturized.
　そこで、小形化に対応可能なジェスチャ判定装置を提供することを目的とする。 Therefore, the purpose is to provide a gesture judgment device that can cope with miniaturization.
　本発明の実施形態のジェスチャ判定装置は、配線板上に平行に設けられた複数の電極と、前記複数の電極の各々を介して複数の静電容量を測定する測定回路と、測定された前記複数の静電容量から被検出体のジェスチャを判定する判定部とを含み、前記判定部は、前記複数の静電容量のうちのいずれか１つが第１閾値以上になったときの前記複数の静電容量と、前記全ての静電容量が前記第１閾値以下の第２閾値未満になったときの前記複数の静電容量とから、被検出体のジェスチャを判定する。 The gesture determination device of the embodiment of the present invention includes a plurality of electrodes provided in parallel on a wiring plate, a measurement circuit for measuring a plurality of capacitances via each of the plurality of electrodes, and the measured one. The determination unit includes a determination unit that determines the gesture of the object to be detected from a plurality of capacitances, and the determination unit includes the plurality of determination units when any one of the plurality of capacitances becomes the first threshold value or more. The gesture of the object to be detected is determined from the capacitance and the plurality of capacitances when all the capacitances are equal to or less than the first threshold and less than the second threshold.
　小形化に対応可能なジェスチャ判定装置を提供することができる。 It is possible to provide a gesture judgment device that can handle miniaturization.
実施形態のジェスチャ判定装置１００を示す図である。It is a figure which shows the gesture determination apparatus 100 of an embodiment. 電極１１０Ａ、１１１Ａ、１１２Ａ、１１３Ａの配置を示す図である。It is a figure which shows the arrangement of electrodes 110A, 111A, 112A, 113A. ジェスチャ判定装置１００がジェスチャを判定する方法を説明する図である。It is a figure explaining the method which the gesture determination apparatus 100 determines a gesture. ジェスチャ判定装置１００がジェスチャを判定する方法を説明する図である。It is a figure explaining the method which the gesture determination apparatus 100 determines a gesture. コンピュータ１２０Ａが実行する処理を示すフローチャートである。It is a flowchart which shows the process which a computer 120A executes. 実施形態の変形例によるジェスチャ判定装置１００Ｍを示す図である。It is a figure which shows the gesture determination apparatus 100M by the modification of embodiment. ジェスチャ判定装置１００Ｍのコンピュータ１２０Ａが実行する処理を示すフローチャートである。It is a flowchart which shows the process which the computer 120A of the gesture determination apparatus 100M executes.
　以下、本発明のジェスチャ判定装置を適用した実施形態について説明する。 Hereinafter, an embodiment to which the gesture determination device of the present invention is applied will be described.
　＜実施形態＞
　図１は、実施形態のジェスチャ判定装置１００を示す図である。以下では、ＸＹＺ座標系を定義して説明する。また、以下では、平面視とはＸＹ面視のことであり、説明の便宜上、－Ｚ方向側を下側又は下、＋Ｚ方向側を上側又は上と称すが、普遍的な上下関係を表すものではない。 <Embodiment>
FIG. 1 is a diagram showing a gesture determination device 100 of an embodiment. In the following, the XYZ coordinate system will be defined and described. Further, in the following, the plan view is an XY plane view, and for convenience of explanation, the −Z direction side is referred to as a lower side or a lower side, and the + Z direction side is referred to as an upper side or an upper side. is not it.
　ジェスチャ判定装置１００は、配線板１０、電極１１０Ａ、１１１Ａ、１１２Ａ、１１３Ａ、及び、ジェスチャ検出部１２０を含む。ここでは、図１に加えて図２を用いてジェスチャ判定装置１００の構成について説明する。図２は、電極１１０Ａ、１１１Ａ、１１２Ａ、１１３Ａの配置を示す図である。 The gesture determination device 100 includes a wiring board 10, electrodes 110A, 111A, 112A, 113A, and a gesture detection unit 120. Here, the configuration of the gesture determination device 100 will be described with reference to FIG. 2 in addition to FIG. FIG. 2 is a diagram showing the arrangement of electrodes 110A, 111A, 112A, 113A.
　配線板１０は、Ｘ方向に長手方向を有する平面視で長方形状の絶縁体製のシートである。配線板１０は、配線基板であってもよい。また、配線板１０は、平面視で長方形状である。配線板１０は、平面視で長方形状ではなくてもよいが、長方形状ではない場合には、図１に配線板１０として示すような長方形状の領域を有していればよい。 The wiring board 10 is a sheet made of an insulator having a rectangular shape in a plan view having a longitudinal direction in the X direction. The wiring board 10 may be a wiring board. Further, the wiring board 10 has a rectangular shape in a plan view. The wiring board 10 does not have to be rectangular in a plan view, but if it is not rectangular, it may have a rectangular area as shown as the wiring board 10 in FIG.
　電極１１０Ａ～１１３Ａは、一例として銅又はアルミニウム等の金属製であり、配線板１０の上面に形成されている。電極１１０Ａ～１１３Ａは、配線板１０の上面の中央の長方形状の領域１１を囲むように、配線板１０の四辺に沿って配置されている。電極１１０Ａは領域１１の＋Ｙ方向側に位置し、電極１１１Ａは領域１１の－Ｙ方向側に位置し、電極１１２Ａは領域１１の－Ｘ方向側に位置し、電極１１３Ａは領域１１の＋Ｘ方向側に位置している。 The electrodes 110A to 113A are made of metal such as copper or aluminum as an example, and are formed on the upper surface of the wiring board 10. The electrodes 110A to 113A are arranged along the four sides of the wiring board 10 so as to surround the central rectangular region 11 on the upper surface of the wiring board 10. The electrode 110A is located on the + Y direction side of the region 11, the electrode 111A is located on the −Y direction side of the region 11, the electrode 112A is located on the −X direction side of the region 11, and the electrode 113A is located on the + X direction side of the region 11. Is located in.
　電極１１０Ａ～１１３Ａは、配線板１０上に平行に設けられた複数の電極の一例である。具体的には、電極１１０Ａと電極１１１Ａとが対向しており、平行である。電極１１２Ａと電極１１３Ａとが対向しており、平行である。電極１１０Ａ及び１１１Ａは、ともにＸ軸に平行な長手方向を有する長方形状の電極である。電極１１２Ａ及び１１３Ａは、ともにＹ軸に平行な長手方向を有する長方形状の電極である。電極１１０Ａ～１１３Ａは、配線板１０と相似形で配線板１０よりも少し小さい長方形の四辺に相当する位置に設けられている。＋Ｘ方向（右方向）、－Ｘ方向（左方向）、＋Ｙ方向（前方向）、－Ｙ方向（後ろ方向）のジェスチャを検出可能にするためである。 The electrodes 110A to 113A are examples of a plurality of electrodes provided in parallel on the wiring board 10. Specifically, the electrode 110A and the electrode 111A face each other and are parallel to each other. The electrode 112A and the electrode 113A face each other and are parallel to each other. The electrodes 110A and 111A are both rectangular electrodes having a longitudinal direction parallel to the X axis. The electrodes 112A and 113A are both rectangular electrodes having a longitudinal direction parallel to the Y axis. The electrodes 110A to 113A are provided at positions corresponding to the four sides of a rectangle similar to the wiring board 10 and slightly smaller than the wiring board 10. This is to enable detection of gestures in the + X direction (right direction), the −X direction (left direction), the + Y direction (front direction), and the −Y direction (rear direction).
　電極１１０Ａ及び１１１Ａは、Ｘ方向における位置が等しく互いに等しいサイズを有する。電極１１２Ａ及び１１３Ａは、Ｙ方向における位置が等しく互いに等しいサイズを有する。電極１１０Ａと、電極１１２Ａとは、Ｘ方向において重複する区間を有さず、Ｙ方向においても重複する区間を有しない。同様に電極１１０Ａと、電極１１３Ａとは、Ｘ方向にも、Ｙ方向にも重複する区間を有しない。電極１１１Ａと、電極１１２Ａとは、Ｘ方向にも、Ｙ方向にも重複する区間を有しない。電極１１１Ａと、電極１１３Ａとは、Ｘ方向にも、Ｙ方向にも重複する区間を有しない。すなわち、電極１１０Ａ、１１１Ａ、１１２Ａ、１１３Ａは、配線板１０の中央の領域１１と、四隅の角部の領域１２との内部には設けられていない。四隅の角部の領域１２に電極１１０Ａ～１１３Ａを設けていないため、斜め方向のジェスチャが行われても、斜め方向のジェスチャがＸ方向、または、Ｙ方向のどちらに近いジェスチャであるかを正確に検出できる。 The electrodes 110A and 111A have the same position in the X direction and the same size as each other. The electrodes 112A and 113A have equal positions in the Y direction and are of equal size to each other. The electrode 110A and the electrode 112A do not have an overlapping section in the X direction and do not have an overlapping section in the Y direction. Similarly, the electrode 110A and the electrode 113A do not have overlapping sections in the X direction and the Y direction. The electrode 111A and the electrode 112A do not have an overlapping section in either the X direction or the Y direction. The electrode 111A and the electrode 113A do not have an overlapping section in either the X direction or the Y direction. That is, the electrodes 110A, 111A, 112A, and 113A are not provided inside the central region 11 of the wiring board 10 and the corner regions 12 at the four corners. Since the electrodes 110A to 113A are not provided in the corner regions 12 of the four corners, even if an oblique gesture is performed, it is possible to accurately determine whether the oblique gesture is the X-direction or the Y-direction gesture. Can be detected.
　ここで、電極１１０Ａ～１１３Ａは、一例として、自己容量方式で利用者の手との間に生じる静電容量を測定するために用いられる。ジェスチャ判定装置１００は、電極１１０Ａ～１１３Ａの各々を介してジェスチャ検出部１２０の測定回路１２１によって測定される静電容量に基づいて、判定部が利用者の手のジェスチャを判定する装置である。利用者の手は被検出体の一例であるが、被検出体は利用者の手に限らず、足、脚、又は利用者が保持する導電体製の物体（例えば、金属棒）等であってもよい。なお、電極１１０Ａ、１１１Ａ、１１２Ａ、１１３Ａを特に区別しない場合には単に電極１１０と称す。 Here, the electrodes 110A to 113A are used, for example, for measuring the capacitance generated between the user's hand and the user's hand by the self-capacitance method. The gesture determination device 100 is a device in which the determination unit determines the gesture of the user's hand based on the capacitance measured by the measurement circuit 121 of the gesture detection unit 120 via each of the electrodes 110A to 113A. The user's hand is an example of the object to be detected, but the object to be detected is not limited to the user's hand, but may be a foot, a leg, or a conductive object (for example, a metal rod) held by the user. You may. When the electrodes 110A, 111A, 112A, and 113A are not particularly distinguished, they are simply referred to as electrodes 110.
　ジェスチャ検出部１２０は、測定回路１２１、判定部１２２、メモリ１２３、及び切り替え回路１２４を有する。ジェスチャ検出部１２０のうち、測定回路１２１、判定部１２２、及びメモリ１２３は、ＣＰＵ(Central Processing Unit)、ＲＡＭ(Random Access Memory)、ＲＯＭ(Read Only Memory)、入出力インターフェース、及び内部バス等を含むコンピュータ１２０Ａによって実現される。 The gesture detection unit 120 has a measurement circuit 121, a determination unit 122, a memory 123, and a switching circuit 124. Of the gesture detection units 120, the measurement circuit 121, the determination unit 122, and the memory 123 include a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an input / output interface, an internal bus, and the like. It is realized by the including computer 120A.
　測定回路１２１、判定部１２２は、コンピュータ１２０Ａが実行するプログラムの機能（ファンクション）を機能ブロックとして示したものである。また、メモリ１２３は、コンピュータ１２０Ａのメモリを機能的に表したものである。測定回路１２１、判定部１２２、及びメモリ１２３は、コンピュータ１２０Ａの内部のバス等によってデータ通信可能に接続されている。また、測定回路１２１は、コンピュータ１２０Ａの外部の切り替え回路１２４に接続されている。 The measurement circuit 121 and the determination unit 122 show the function of the program executed by the computer 120A as a functional block. Further, the memory 123 functionally represents the memory of the computer 120A. The measurement circuit 121, the determination unit 122, and the memory 123 are connected so as to be capable of data communication by a bus or the like inside the computer 120A. Further, the measurement circuit 121 is connected to an external switching circuit 124 of the computer 120A.
　測定回路１２１は、電極１１０Ａ～１１３Ａの各静電容量を測定する。測定回路１２１は、電極１１０Ａ～１１３Ａに手Ｈが近づくと、電極の静電容量が変化することを利用して、手Ｈの近接を検知する周知の回路である。静電容量は、直接、測定できないので、電流や電圧を測定し、静電容量を算出する。測定回路１２１は、電極１１０Ａ～１１３Ａの各々を介して測定する４つの測定値が検出閾値未満のときに、電極１１０Ａ～１１３Ａの各々を介して時系列的に複数回測定して得る測定値の平均値を電極１１０Ａ～１１３Ａの各々について求める。そして、測定回路１２１は、求めた平均値を電極１１０Ａ～１１３Ａの各々について静電容量を測定する際の基準値として設定する。 The measuring circuit 121 measures each capacitance of the electrodes 110A to 113A. The measurement circuit 121 is a well-known circuit that detects the proximity of the hand H by utilizing the fact that the capacitance of the electrode changes when the hand H approaches the electrodes 110A to 113A. Since the capacitance cannot be measured directly, the current and voltage are measured and the capacitance is calculated. The measuring circuit 121 is a measurement value obtained by measuring a plurality of times in a time series via each of the electrodes 110A to 113A when the four measured values measured via each of the electrodes 110A to 113A are less than the detection threshold value. The average value is obtained for each of the electrodes 110A to 113A. Then, the measuring circuit 121 sets the obtained average value as a reference value when measuring the capacitance for each of the electrodes 110A to 113A.
　検出閾値とは、被検出体が近くに無い場合に測定される測定値の上限であり、予め設定されてメモリ１２３に格納されている。検出閾値は、電極１１０Ａ～１１３Ａについて共通の値であってもよいし、電極１１０Ａ～１１３Ａの各々について別々に設定されていてもよい。基準値は、電極１１０Ａ～１１３Ａについて別個独立的に求められる値であり、電極１１０Ａ～１１３Ａの近くに手Ｈが存在しない状態で、測定回路１２１が電極１１０Ａ～１１３Ａを測定した測定値の平均である。基準値は、ノイズ等の影響を排除するために用いられる。 The detection threshold is the upper limit of the measured value measured when the object to be detected is not nearby, and is preset and stored in the memory 123. The detection threshold value may be a common value for the electrodes 110A to 113A, or may be set separately for each of the electrodes 110A to 113A. The reference value is a value obtained separately and independently for the electrodes 110A to 113A, and is an average of the measured values measured by the measuring circuit 121 on the electrodes 110A to 113A in a state where the hand H is not present near the electrodes 110A to 113A. be. The reference value is used to eliminate the influence of noise and the like.
　そして、測定回路１２１は、電極１１０Ａ～１１３Ａの各測定値が得られると、得られた測定値から基準値を減算した値を電極１１０Ａ～１１３Ａの各静電容量として出力する。ここで、電極１１０Ａ～１１３Ａの各々を測定した測定値と基準値との差をそれぞれ、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３として算出する。以下では、測定値と基準値との差から算出される値を静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３と称す。正確に言うと、Ｃ０、Ｃ１、Ｃ２、Ｃ３は、基準値に対する静電容量の変化量である。 Then, when the measured values of the electrodes 110A to 113A are obtained, the measuring circuit 121 outputs a value obtained by subtracting the reference value from the obtained measured values as each capacitance of the electrodes 110A to 113A. Here, the difference between the measured value measured for each of the electrodes 110A to 113A and the reference value is calculated as the capacitances C0, C1, C2, and C3, respectively. Hereinafter, the values calculated from the difference between the measured value and the reference value are referred to as capacitances C0, C1, C2, and C3. To be precise, C0, C1, C2, and C3 are changes in capacitance with respect to the reference value.
　判定部１２２は、測定回路１２１から得られる静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３に基づいてジェスチャ（の種類）を判定する。判定部１２２がジェスチャを判定する際の条件や、具体的な判定方法については、図３及び図４を用いて後述する。 The determination unit 122 determines the gesture (type) based on the capacitances C0, C1, C2, and C3 obtained from the measurement circuit 121. The conditions for the determination unit 122 to determine the gesture and the specific determination method will be described later with reference to FIGS. 3 and 4.
　メモリ１２３は、コンピュータ１２０Ａが実行するプログラムやデータを格納する。このため、測定回路１２１から得られる静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３や、判定部１２２によるジェスチャの判定結果もメモリ１２３に格納される。 The memory 123 stores programs and data executed by the computer 120A. Therefore, the capacitances C0, C1, C2, C3 obtained from the measurement circuit 121 and the gesture determination result by the determination unit 122 are also stored in the memory 123.
　切り替え回路１２４は、電極１１０Ａ～１１３Ａと測定回路１２１との間の接続を切り替えるマルチプレクサである。 The switching circuit 124 is a multiplexer that switches the connection between the electrodes 110A to 113A and the measuring circuit 121.
　図３及び図４は、ジェスチャ判定装置１００がジェスチャを判定する方法を説明する図である。ここで、ジェスチャとは、ジェスチャ判定装置１００の利用者が電極１１０Ａ～１１３Ａに触れることなく、手振り等によってジェスチャ判定装置１００に指令を入力することをいう。ジェスチャ判定装置１００は、利用者のジェスチャを判定する。 3 and 4 are diagrams illustrating a method by which the gesture determination device 100 determines a gesture. Here, the gesture means that the user of the gesture determination device 100 inputs a command to the gesture determination device 100 by hand gesture or the like without touching the electrodes 110A to 113A. The gesture determination device 100 determines the gesture of the user.
　例えば、利用者は、図３に手Ｈと破線の矢印で示すように、電極１１０Ａ～１１３Ａの外部の－Ｘ方向側から電極１１０Ａ～１１３Ａの内部を通って電極１１０Ａ～１１３Ａの＋Ｘ方向側に向かって右方向に手を振るジェスチャを行うことができる。また、利用者は、図３に示すジェスチャとはＸ方向において反対方向に、左方向に手を振るジェスチャを行うことができる。 For example, as shown by the hand H and the broken line arrow in FIG. 3, the user passes through the inside of the electrodes 110A to 113A from the outside −X direction side of the electrodes 110A to 113A to the + X direction side of the electrodes 110A to 113A. You can make a gesture of waving to the right. Further, the user can perform a gesture of waving his / her hand to the left in the direction opposite to the gesture shown in FIG. 3 in the X direction.
　また、利用者は、図４に手Ｈと破線の矢印で示すように、電極１１０Ａ～１１３Ａの外部の－Ｙ方向側から電極１１０Ａ～１１３Ａの内部を通って電極１１０Ａ～１１３Ａの＋Ｙ方向側に向かって前方向に手を振るジェスチャを行うことができる。また、利用者は、図４に示すジェスチャとはＹ方向において反対方向に、後方向に手を振るジェスチャを行うことができる。 Further, as shown by the hand H and the broken line arrow in FIG. 4, the user passes through the inside of the electrodes 110A to 113A from the outside −Y direction side of the electrodes 110A to 113A to the + Y direction side of the electrodes 110A to 113A. You can make a gesture of waving your hand forward. In addition, the user can perform a gesture of waving his / her hand in the direction opposite to the gesture shown in FIG. 4 in the Y direction.
　ジェスチャ判定装置１００の判定部１２２は、右方向に手を振るジェスチャ、左方向に手を振るジェスチャ、前方向に手を振るジェスチャ、及び、後方向に手を振るジェスチャをすべて判別し、ジェスチャを判定する。 The determination unit 122 of the gesture determination device 100 determines all of the gestures waving to the right, the gestures waving to the left, the gestures waving forward, and the gestures waving backward, and determines the gesture. judge.
　判定部１２２は、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときに、手Ｈが平面視で電極１１０Ａ～１１３Ａの外部から近づいてきたと判定し、そのときの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３をメモリ１２３に格納する。ここで、第１閾値ＴＨ１は、検出閾値よりも大きく、電極１１０Ａ～１１３Ａに手Ｈがある程度近づいた状態であるかどうかを判定するための値である。 The determination unit 122 determines that the hand H is approaching from the outside of the electrodes 110A to 113A in a plan view when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more. Then, the capacitances C0, C1, C2, and C3 at that time are stored in the memory 123. Here, the first threshold value TH1 is larger than the detection threshold value, and is a value for determining whether or not the hand H is in a state of approaching the electrodes 110A to 113A to some extent.
　電極１１０Ａ～１１３Ａの近くに手Ｈが存在していない状態では、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の全てが第１閾値ＴＨ１以下になる。例えば図３のように電極１１２Ａに－Ｘ方向側から手Ｈが近づいて来たときは、電極１１０２Ａを介して測定回路１２１によって測定される静電容量Ｃ２の値が最初に第１閾値ＴＨ１よりも大きくなる。同様に図４のように電極１１１Ａに－Ｙ方向側から手Ｈが近づいて来たときには、電極１１１Ａを介して測定回路１２１によって測定される静電容量Ｃ１の値が最初に第１閾値ＴＨ１よりも大きくなる。 When the hand H does not exist near the electrodes 110A to 113A, all of the capacitances C0, C1, C2, and C3 are equal to or less than the first threshold value TH1. For example, when the hand H approaches the electrode 112A from the −X direction side as shown in FIG. 3, the value of the capacitance C2 measured by the measuring circuit 121 via the electrode 1102A is first from the first threshold value TH1. Will also grow. Similarly, as shown in FIG. 4, when the hand H approaches the electrode 111A from the −Y direction side, the value of the capacitance C1 measured by the measuring circuit 121 via the electrode 111A first becomes higher than the first threshold value TH1. Will also grow.
　また、判定部１２２は、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になった後に、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のすべてが第１閾値ＴＨ１以下の第２閾値ＴＨ２未満になったときの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３をメモリ１２３に格納する。静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のすべてが第２閾値ＴＨ２未満になったときは、すべての電極１１０Ａ～１１３Ａから手Ｈがある程度遠ざかったことを表すからである。第２閾値ＴＨ２は、第１閾値ＴＨ１以下の値である。第１閾値ＴＨ１と、第２閾値ＴＨ２は、同じ値でも良い。ノイズの多い環境では、第２閾値を第１閾値未満にすることで、誤検出を抑制できる。進入するときの第１閾値ＴＨ１よりも、進出するときの第２閾値ＴＨ２を小さくすることは、所謂チャタリング防止対策として、電気回路やソフトウェアで周知の技術である。 Further, in the determination unit 122, after any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, all of the capacitances C0, C1, C2, and C3 have the first threshold value. The capacitances C0, C1, C2, and C3 when the threshold value is less than the second threshold value TH2, which is TH1 or less, are stored in the memory 123. This is because when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value TH2, it means that the hand H has moved away from all the electrodes 110A to 113A to some extent. The second threshold value TH2 is a value equal to or less than the first threshold value TH1. The first threshold value TH1 and the second threshold value TH2 may have the same value. In a noisy environment, erroneous detection can be suppressed by setting the second threshold value to less than the first threshold value. Making the second threshold value TH2 when advancing smaller than the first threshold value TH1 when entering is a well-known technique in electric circuits and software as a so-called chattering prevention measure.
　被検出体がある高さで移動すると、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３が第１閾値ＴＨ１になる位置は、図２の１１０Ａ１～１１３Ａ１で示される。よって、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つのみが第１閾値ＴＨ１以上になったとき、被検出体は、１１０Ａ１～１１３Ａ１を合わせた図形の輪郭１１５Ａ１に位置する。この位置を進入座標（Ｘｉｎ、Ｙｉｎ）として、ジェスチャ判断に用いる。第１閾値ＴＨ１と第２閾値ＴＨ２が等しい場合において、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の全てが第２閾値ＴＨ２未満となったときの被検出体は、１１０Ａ１～１１３Ａ１を合わせた図形の輪郭１１５Ａ１のすぐ外側に位置する。ジェスチャ操作を検出すべき上限の高さで、被検出体を移動した場合において、静電容量Ｃ０が第２閾値ＴＨ２以上になる領域１１０Ａ１と、静電容量Ｃ１が第２閾値ＴＨ２以上になる領域１１１Ａ１とが重なるようにしている。この為、ジェスチャ操作を検出する高さでは、輪郭１１５Ａ１の内部で、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の内、少なくとも１つが第２閾値ＴＨ２以上になる。即ち、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の全てが第２閾値ＴＨ２未満になったとき、被検出体は、輪郭１１５Ａ１の外側に位置する。尚、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったとき、全ての静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３は検出閾値以上になるように設計する。よって、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったとき、全ての静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３を測定可能である。同様に、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の全てが第２閾値ＴＨ２未満となったとき、全ての静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３は検出閾値以上になるように設計する。よって、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちの全てが第２閾値ＴＨ２未満になったとき、全ての静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３を測定可能である。即ち、輪郭１１５Ａ１に被検出体が位置するとき、全ての静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３を測定可能である。よって、輪郭１１５Ａ１に被検出体が位置するとき、被検出体の位置を特定できる。輪郭１１５Ａ１上の２点を用いて、ジェスチャを判断するので、ジェスチャで手Ｈを動かす範囲内に輪郭１１５Ａ１が収まるように第１閾値ＴＨ１と第２閾値ＴＨ２とを設定する。 The positions where the capacitances C0, C1, C2, and C3 become the first threshold value TH1 when the object to be detected moves at a certain height are indicated by 110A1 to 113A1 in FIG. Therefore, when only one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, the detected object is located at the contour 115A1 of the figure in which 110A1 to 113A1 are combined. This position is used as the approach coordinates (Xin, Yin) for gesture judgment. When the first threshold value TH1 and the second threshold value TH2 are equal, and the capacitances C0, C1, C2, and C3 are all less than the second threshold value TH2, the detected object is a figure obtained by combining 110A1 to 113A1. It is located just outside the contour 115A1. A region 110A1 in which the capacitance C0 becomes the second threshold value TH2 or more and a region in which the capacitance C1 becomes the second threshold value TH2 or more when the object to be detected is moved at the upper limit height at which the gesture operation should be detected. It is designed to overlap with 111A1. Therefore, at the height at which the gesture operation is detected, at least one of the capacitances C0, C1, C2, and C3 inside the contour 115A1 becomes the second threshold value TH2 or more. That is, when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value TH2, the detected object is located outside the contour 115A1. When any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, all the capacitances C0, C1, C2, and C3 are designed to be equal to or higher than the detection threshold value. do. Therefore, when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more, all the capacitances C0, C1, C2, and C3 can be measured. Similarly, when all of the capacitances C0, C1, C2 and C3 are less than the second threshold value TH2, all the capacitances C0, C1, C2 and C3 are designed to be equal to or more than the detection threshold value. Therefore, when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value TH2, all the capacitances C0, C1, C2, and C3 can be measured. That is, when the object to be detected is located on the contour 115A1, all the capacitances C0, C1, C2, and C3 can be measured. Therefore, when the detected body is located on the contour 115A1, the position of the detected body can be specified. Since the gesture is determined using the two points on the contour 115A1, the first threshold value TH1 and the second threshold value TH2 are set so that the contour 115A1 fits within the range in which the hand H is moved by the gesture.
　判定部１２２は、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３と、全ての静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３が第２閾値未満になったときの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３とから、手Ｈのジェスチャを判定する。より具体的には、判定部１２２は、次のようにしてジェスチャを判定する。 The determination unit 122 includes the capacitances C0, C1, C2, and C3 when any one of the capacitances C0, C1, C2, and C3 becomes equal to or higher than the first threshold value TH1, and all the capacitances C0. , C1, C2, C3 are less than the second threshold, and the capacitances C0, C1, C2, and C3 are used to determine the gesture of the hand H. More specifically, the determination unit 122 determines the gesture as follows.
　判定部１２２は、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３を静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３としてメモリ１２３に格納する。電極１１０Ａ～１１３Ａから離れた位置から手Ｈが近づいて来て、電極１１０Ａ～１１３Ａの何れかに近づいたときの進入座標を求めるために、静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３をメモリ１２３に格納する。進入座標は、図２の輪郭１１５Ａ１に入ったときの座標である。また、電極１１０Ａ～１１３Ａで囲まれる領域とは、領域１１と、電極１１０Ａ～１１３Ａが存在する領域とを合わせた領域であり、平面視で電極１１０Ａ～１１３Ａの外側の縁によって囲まれる領域である。 The determination unit 122 uses the capacitances C0, C1, C2, and C3 as the capacitances C0, C1, C2, and C3 when any one of the capacitances C0, C1, C2, and C3 becomes equal to or higher than the first threshold value TH1. It is stored in the memory 123 as Cin2 and Cin3. Capacitances Cin0, Cin1, Cin2, and Cin3 are set in the memory 123 in order to obtain the approach coordinates when the hand H approaches from a position away from the electrodes 110A to 113A and approaches any of the electrodes 110A to 113A. Store. The approach coordinates are the coordinates when entering the contour 115A1 of FIG. The region surrounded by the electrodes 110A to 113A is a region in which the region 11 and the region in which the electrodes 110A to 113A exist are combined, and is a region surrounded by the outer edges of the electrodes 110A to 113A in a plan view. ..
　そして、判定部１２２は、メモリ１２３に格納した静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３と、次式（１）とに基づいて、手Ｈがいずれかの電極１１０Ａ～１１３Ａに近づいたときの進入座標（Ｘｉｎ，Ｙｉｎ）を求める。
（Ｘｉｎ，Ｙｉｎ）＝（Ｃｉｎ３／（Ｃｉｎ３＋Ｃｉｎ２），Ｃｉｎ０／（Ｃｉｎ０＋Ｃｉｎ１））　　　（１） Then, the determination unit 122 enters when the hand H approaches any of the electrodes 110A to 113A based on the capacitances Cin0, Cin1, Cin2, Cin3 stored in the memory 123 and the following equation (1). Obtain the coordinates (Xin, Yin).
(Xin, Yin) = (Cin3 / (Cin3 + Cin2), Cin0 / (Cin0 + Cin1)) (1)
　電極１１２Ａ及び１１３Ａは、電極１１０Ａ～１１３ＡのうちＸ方向の両側に配置されており、電極１１０Ａ及び１１１Ａは、電極１１０Ａ～１１３ＡのうちＹ方向の両側に配置されている。電極１１０Ａ～１１３Ａで囲まれる領域内へは、Ｘ方向では電極１１２Ａ又は１１３Ａを跨いで進入することを想定しており、Ｙ方向では電極１１０Ａ又は１１１Ａを跨いで進入することを想定している。なお、電極１１２Ａ又は１１３Ａを跨いでいれば、Ｘ方向に対して斜め方向に手Ｈを動かすジェスチャであってもよく、電極１１０Ａ又は１１１Ａを跨いでいれば、Ｙ方向に対して斜め方向に手Ｈを動かすジェスチャであってもよい。 The electrodes 112A and 113A are arranged on both sides of the electrodes 110A to 113A in the X direction, and the electrodes 110A and 111A are arranged on both sides of the electrodes 110A to 113A in the Y direction. It is assumed that the region surrounded by the electrodes 110A to 113A is entered across the electrodes 112A or 113A in the X direction, and is assumed to enter across the electrodes 110A or 111A in the Y direction. If it straddles the electrodes 112A or 113A, it may be a gesture that moves the hand H diagonally with respect to the X direction, and if it straddles the electrodes 110A or 111A, the hand may move diagonally with respect to the Y direction. It may be a gesture that moves H.
　式（１）は、電極１１２Ａ及び１１３Ａから得られる静電容量Ｃｉｎ２及びＣｉｎ３の和に対する静電容量Ｃｉｎ３の比で進入座標のＸ座標を求め、電極１１０Ａ及び１１１Ａから得られる静電容量Ｃｉｎ０及びＣｉｎ１の和に対する静電容量Ｃｉｎ０の比でＹ座標を求める式である。Ｘ座標についての分子を静電容量Ｃｉｎ３にしているのは、＋Ｘ方向を基準にしているからであり、Ｙ座標についての分子を静電容量Ｃｉｎ０にしているのは、＋Ｙ方向を基準にしているからである。 In the formula (1), the X coordinate of the approach coordinate is obtained by the ratio of the capacitance Cin3 to the sum of the capacitances Cin2 and Cin3 obtained from the electrodes 112A and 113A, and the capacitances Cin0 and Cin1 obtained from the electrodes 110A and 111A are obtained. It is an equation to obtain the Y coordinate by the ratio of the capacitance Cin0 to the sum of. The numerator for the X coordinate is set to the capacitance Cin3 because it is based on the + X direction, and the molecule for the Y coordinate is set to the capacitance Cin0 based on the + Y direction. Because.
　進入座標（Ｘｉｎ，Ｙｉｎ）は、電極１１０Ａ～１１３Ａで囲まれる領域の外側の点の座標として求められる。例えば図３の－Ｘ方向側の手Ｈのように電極１１２Ａに－Ｘ方向側から手Ｈが近づいて来たときや、図４の－Ｙ方向側の手Ｈのように電極１１１Ａに－Ｙ方向側から手Ｈが近づいて来たときのように、電極１１０Ａ～１１３Ａで囲まれる領域の外側から進入するため、進入座標は、電極１１０Ａ～１１３Ａで囲まれる領域の外側の領域になる。 The approach coordinates (Xin, Yin) are obtained as the coordinates of points outside the region surrounded by the electrodes 110A to 113A. For example, when the hand H approaches the electrode 112A from the −X direction side like the hand H on the −X direction side in FIG. 3, or −Y to the electrode 111A like the hand H on the −Y direction side in FIG. Since the hand H enters from the outside of the region surrounded by the electrodes 110A to 113A as when the hand H approaches from the direction side, the approach coordinates are the region outside the region surrounded by the electrodes 110A to 113A.
　また、判定部１２２は、メモリ１２３に格納した静電容量Ｃｏｕｔ０、Ｃｏｕｔ１、Ｃｏｕｔ２、Ｃｏｕｔ３と、次式（２）とに基づいて手Ｈが電極１１０Ａ～１１３Ａの何れからも離れた進出座標（Ｘｏｕｔ，Ｙｏｕｔ）を求める。
（Ｘｏｕｔ，Ｙｏｕｔ）＝（Ｃｏｕｔ３／（Ｃｏｕｔ３＋Ｃｏｕｔ２），Ｃｏｕｔ０／（Ｃｏｕｔ０＋Ｃｏｕｔ１））　　　（２） Further, the determination unit 122 has advance coordinates (Xout) in which the hand H is separated from any of the electrodes 110A to 113A based on the capacitances Cout0, Cout1, Cout2, and Cout3 stored in the memory 123 and the following equation (2). , Yout).
(Xout, Youout) = (Cout3 / (Cout3 + Cout2), Cout0 / (Cout0 + Cout1)) (2)
　ジェスチャ操作を検出可能な高さにおいて、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３が第１閾値ＴＨ１になる輪郭の内部では、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の何れかが１つ以上が必ず第２閾値ＴＨ２以上になる。この為、進出座標（Ｘｏｕｔ，Ｙｏｕｔ）は、電極１１０Ａ～１１３Ａで囲まれた領域の外側になる。電極１１０Ａ～１１３Ａで囲まれる領域の内部から外部への進出は、Ｘ方向では電極１１２Ａ又は１１３Ａを跨いで進出することを想定しており、Ｙ方向では電極１１０Ａ又は１１１Ａを跨いで進出することを想定している。このため、式（２）は、式（１）と同様の構成を有し、式（１）の静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３を静電容量Ｃｏｕｔ０、Ｃｏｕｔ１、Ｃｏｕｔ２、Ｃｏｕｔ３に入れ替えた構成を有する。 At a height at which gesture operation can be detected, one or more of the capacitances C0, C1, C2, and C3 are inside the contour where the capacitances C0, C1, C2, and C3 become the first threshold value TH1. It will always be the second threshold TH2 or higher. Therefore, the advance coordinates (Xout, Youout) are outside the region surrounded by the electrodes 110A to 113A. The advance from the inside to the outside of the region surrounded by the electrodes 110A to 113A is assumed to advance across the electrodes 112A or 113A in the X direction, and to advance across the electrodes 110A or 111A in the Y direction. I'm assuming. Therefore, the formula (2) has the same configuration as the formula (1), and the capacitances Cin0, Cin1, Cin2, and Cin3 of the formula (1) are replaced with the capacitances Cout0, Cout1, Cout2, and Cout3. Has a configuration.
　判定部１２２は、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下で、かつ、Ｙｏｕｔ－Ｙｉｎで求まる値が０以上であれば、ジェスチャは前方向であると判定する。Ｘ方向よりもＹ方向の入力座標と出力座標の差が大きいことからＹ方向のジェスチャである。また、式（１）、（２）のＹｉｎ、Ｙｏｕｔは、分子にＣ０を用いて＋Ｙ方向を基準にして表されるため、ＹｏｕｔがＹｉｎ以上になる場合は、Ｙｉｎの値が比較的小さく、Ｙｏｕｔの値が比較的大きくなる場合である。このような場合に相当するのは、電極１１１Ａから電極１１０Ａに向かうジェスチャである。このため、判定部１２２は前方向と判定する。 The determination unit 122 determines that the gesture is in the forward direction if the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin and the value obtained by Youout-Yin is 0 or more. This is a gesture in the Y direction because the difference between the input coordinates and the output coordinates in the Y direction is larger than that in the X direction. Further, since Yin and Yout in the formulas (1) and (2) are expressed with reference to the + Y direction using C0 as the molecule, when Yout is Yin or more, the value of Yin is relatively small. This is the case when the value of Yout is relatively large. Corresponding to such a case is a gesture from the electrode 111A to the electrode 110A. Therefore, the determination unit 122 determines that the direction is forward.
　また、判定部１２２は、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下で、かつ、Ｙｏｕｔ－Ｙｉｎの値が０以上でなければ、ジェスチャは後方向であると判定する。Ｘ方向よりもＹ方向の入力座標と出力座標の差が大きいことからＹ方向のジェスチャであり、かつ、ＹｏｕｔがＹｉｎ未満になるのは、電極１１０Ａから電極１１１に向かうジェスチャである。このため、判定部１２２は後方向と判定する。 Further, the determination unit 122 determines that the gesture is in the backward direction unless the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin and the value of Youout-Yin is not 0 or more. Since the difference between the input coordinate and the output coordinate in the Y direction is larger than that in the X direction, it is a gesture in the Y direction, and it is a gesture from the electrode 110A to the electrode 111 that the Youout is less than Yin. Therefore, the determination unit 122 determines that the direction is backward.
　また、判定部１２２は、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下ではなく、かつ、Ｘｏｕｔ－Ｘｉｎの値が０以上であれば、ジェスチャは右方向であると判定する。Ｘ方向よりもＹ方向の入力座標と出力座標の差が小さいことからＸ方向のジェスチャである。また、式（１）、（２）のＸｉｎ、Ｘｏｕｔは、分子にＣ３を用いて＋Ｘ方向を基準にして表されるため、ＸｏｕｔがＸｉｎ以上になる場合は、Ｘｉｎの値が比較的小さく、Ｘｏｕｔの値が比較的大きくなる場合である。このような場合に相当するのは、電極１１２Ａから電極１１３Ａに向かうジェスチャである。このため、判定部１２２は右方向と判定する。 Further, if the absolute value of Xout-Xin is not equal to or less than the absolute value of Yout-Yin and the value of Xout-Xin is 0 or more, the determination unit 122 determines that the gesture is in the right direction. This is a gesture in the X direction because the difference between the input coordinates and the output coordinates in the Y direction is smaller than that in the X direction. Further, since Xin and Xout in the formulas (1) and (2) are expressed with reference to the + X direction using C3 as the molecule, when Xout is Xin or more, the value of Xin is relatively small. This is the case when the value of Xout is relatively large. Corresponding to such a case is a gesture from the electrode 112A to the electrode 113A. Therefore, the determination unit 122 determines that the direction is to the right.
　また、判定部１２２は、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下ではなく、かつ、Ｘｏｕｔ－Ｘｉｎの値が０以上でなければ、ジェスチャは左方向であると判定する。Ｘ方向よりもＹ方向の入力座標と出力座標の差が小さいことからＸ方向のジェスチャであり、かつ、ＸｏｕｔがＸｉｎ未満になるのは、電極１１３Ａから電極１１２Ａに向かうジェスチャである。このため、判定部１２２は左方向と判定する。 Further, the determination unit 122 determines that the gesture is in the left direction if the absolute value of Xout-Xin is not equal to or less than the absolute value of Yout-Yin and the value of Xout-Xin is not 0 or more. Since the difference between the input coordinate and the output coordinate in the Y direction is smaller than that in the X direction, it is a gesture in the X direction, and it is a gesture from the electrode 113A to the electrode 112A that Xout is less than Xin. Therefore, the determination unit 122 determines that the direction is to the left.
　図５は、コンピュータ１２０Ａが実行する処理を示すフローチャートである。図５に示す処理は、電極１１０Ａ～１１３Ａの各静電容量の内、１つ以上の測定値が検出閾値以上になるとスタートする。スタートした時点では、全ての静電容量Ｃ０～Ｃ３が第１閾値ＴＨ１未満である。 FIG. 5 is a flowchart showing a process executed by the computer 120A. The process shown in FIG. 5 starts when one or more of the capacitances of the electrodes 110A to 113A becomes equal to or higher than the detection threshold value. At the time of starting, all the capacitances C0 to C3 are less than the first threshold value TH1.
　測定回路１２１は、静電容量Ｃ０～Ｃ３を算出する（ステップＳ１）。静電容量Ｃ０～Ｃ３はメモリ１２３に格納される。 The measurement circuit 121 calculates the capacitances C0 to C3 (step S1). The capacitances C0 to C3 are stored in the memory 123.
　判定部１２２は、ステップＳ１で算出された静電容量Ｃ０～Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上であるかどうかを判定する（ステップＳ２）。進入座標が得られるかどうかを判定するためである。 The determination unit 122 determines whether or not any one of the capacitances C0 to C3 calculated in step S1 is equal to or higher than the first threshold value TH1 (step S2). This is to determine whether or not the approach coordinates can be obtained.
　判定部１２２は、ステップＳ１で算出された静電容量Ｃ０～Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上である（Ｓ２：ＹＥＳ）と判定すると、ステップＳ２で判定された静電容量Ｃ０～Ｃ３をそれぞれ静電容量Ｃｉｎ０～Ｃｉｎ３に設定する（ステップＳ３）。 When the determination unit 122 determines that any one of the capacitances C0 to C3 calculated in step S1 is equal to or higher than the first threshold value TH1 (S2: YES), the determination unit 122 determines that the capacitance C0 determined in step S2. ~ C3 are set to the capacitances Cin0 to Cin3, respectively (step S3).
　測定回路１２１は、静電容量Ｃ０～Ｃ３を算出する（ステップＳ４）。静電容量Ｃ０～Ｃ３はメモリ１２３に格納される。 The measurement circuit 121 calculates the capacitances C0 to C3 (step S4). The capacitances C0 to C3 are stored in the memory 123.
　判定部１２２は、ステップＳ４で算出された静電容量Ｃ０～Ｃ３のすべてが第２閾値ＴＨ２未満であるかどうかを判定する（ステップＳ５）。進出座標が得られるかどうかを判定するためである。 The determination unit 122 determines whether or not all of the capacitances C0 to C3 calculated in step S4 are less than the second threshold value TH2 (step S5). This is to determine whether or not the advance coordinates can be obtained.
　判定部１２２は、ステップＳ４で算出された静電容量Ｃ０～Ｃ３のすべてが第２閾値ＴＨ２未満である（Ｓ５：ＹＥＳ）と判定すると、ステップＳ４で算出された静電容量Ｃ０～Ｃ３をそれぞれ静電容量Ｃｏｕｔ０～Ｃｏｕｔ３に設定する（ステップＳ６）。 When the determination unit 122 determines that all of the capacitances C0 to C3 calculated in step S4 are less than the second threshold value TH2 (S5: YES), the determination unit 122 determines the capacitances C0 to C3 calculated in step S4, respectively. Capacitances are set to Cout0 to Cout3 (step S6).
　判定部１２２は、静電容量Ｃｉｎ０～Ｃｉｎ３を式（１）に代入して進出座標（Ｘｉｎ，Ｙｉｎ）を求める（ステップＳ７）。 The determination unit 122 substitutes the capacitances Cin0 to Cin3 into the equation (1) to obtain the advance coordinates (Xin, Yin) (step S7).
　判定部１２２は、静電容量Ｃｏｕｔ０～Ｃｏｕｔ３を式（２）に代入して進出座標（Ｘｉｎ，Ｙｉｎ）を求める（ステップＳ８）。 The determination unit 122 substitutes the capacitances Cout0 to Cout3 into the equation (2) to obtain the advance coordinates (Xin, Yin) (step S8).
　判定部１２２は、進入座標（Ｘｉｎ，Ｙｉｎ）と進出座標（Ｘｏｕｔ，Ｙｏｕｔ）に基づき、適切なジェスチャであるかどうかを判定する（ステップＳ９）。適切なジェスチャとは、例えば、進入座標（Ｘｉｎ，Ｙｉｎ）と進出座標（Ｘｏｕｔ，Ｙｏｕｔ）の両方が、電極１１０Ａ～１１３Ａで囲まれた領域の外側にある場合である。この場合、少なくとも一方が領域内であれば、判定部１２２は、適切なジェスチャではないと判定する。電極１１０Ａ～１１３Ａで囲まれる領域の上方（＋Ｚ方向側）から手Ｈを近づけると、進入座標（Ｘｉｎ，Ｙｉｎ）が領域内になる。判定部１２２は、このような場合、適切なジェスチャではないと判定する。また、電極１１０Ａ～１１３Ａで囲まれる領域の上方（＋Ｚ方向側）に手Ｈを引き戻すと、進出座標（Ｘｏｕｔ，Ｙｏｕｔ）が領域内になる。判定部１２２は、このような場合も、適切なジェスチャではないと判定する。 The determination unit 122 determines whether or not the gesture is appropriate based on the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) (step S9). A suitable gesture is, for example, when both the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) are outside the region surrounded by the electrodes 110A-113A. In this case, if at least one of them is in the area, the determination unit 122 determines that the gesture is not appropriate. When the hand H is brought closer from above (+ Z direction side) of the region surrounded by the electrodes 110A to 113A, the approach coordinates (Xin, Yin) are within the region. In such a case, the determination unit 122 determines that the gesture is not appropriate. Further, when the hand H is pulled back to the upper side (+ Z direction side) of the region surrounded by the electrodes 110A to 113A, the advance coordinates (Xout, Youout) become within the region. The determination unit 122 also determines that the gesture is not appropriate in such a case.
　または、進入座標（Ｘｉｎ，Ｙｉｎ）と進出座標（Ｘｏｕｔ，Ｙｏｕｔ）の両方が領域内である場合に、判定部１２２は適切なジェスチャではないと判定しても良い。この場合は、電極１１０Ａ～１１３Ａで囲まれる領域の上方（＋Ｚ方向側）から手Ｈを近づけて、手Ｈを上方に引き戻すようなジェスチャに限って、判定部１２２は、適切なジェスチャではないと判定する。 Alternatively, if both the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) are within the region, the determination unit 122 may determine that the gesture is not appropriate. In this case, the determination unit 122 is not an appropriate gesture only for gestures in which the hand H is brought closer from above the region surrounded by the electrodes 110A to 113A (+ Z direction side) and the hand H is pulled back upward. judge.
　また、進入座標（Ｘｉｎ，Ｙｉｎ）と進出座標（Ｘｏｕｔ，Ｙｏｕｔ）が電極１１０Ａ～１１３Ａで囲まれた領域の外側にあっても、電極１１０Ａ～１１３Ａによって囲まれた領域を通らないジェスチャは、適切なジェスチャではないと判断しても良い。この場合、電極１１０Ａ～１１３Ａで囲まれた領域の内部に入ることなく、斜めに掠るようなジェスチャが行われた場合に、誤検出を抑制するために不適切なジェスチャとして取り扱う。 Further, even if the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) are outside the region surrounded by the electrodes 110A to 113A, the gesture that does not pass through the region surrounded by the electrodes 110A to 113A is appropriate. You may judge that it is not a good gesture. In this case, when a gesture that blurs diagonally without entering the inside of the region surrounded by the electrodes 110A to 113A is performed, it is treated as an inappropriate gesture in order to suppress erroneous detection.
　ステップＳ９では、判定部１２２は、上述した適切ではないジェスチャのうちの少なくともいずれか１つに該当する場合に適切なジェスチャではないと判定すればよい。なお、ステップＳ９において判定対象になる不適切なジェスチャは、上述のすべての不適切なジェスチャではなくてもよく、少なくとも１つ設定されていればよい。 In step S9, the determination unit 122 may determine that the gesture is not appropriate when it corresponds to at least one of the above-mentioned inappropriate gestures. The inappropriate gesture to be determined in step S9 does not have to be all the inappropriate gestures described above, and at least one may be set.
　判定部１２２は、ステップＳ９において適切なジェスチャである（Ｓ９：ＹＥＳ）と判定すると、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下であるかどうかを判定する（ステップＳ１０）。前後方向又は横方向のいずれであるかを判定するためである。 When the determination unit 122 determines in step S9 that the gesture is appropriate (S9: YES), it determines whether the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin (step S10). This is to determine whether it is in the front-back direction or the lateral direction.
　判定部１２２は、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下である（Ｓ１０：ＹＥＳ）と判定すると、Ｙｏｕｔ－Ｙｉｎで求まる値が０以上であるかどうかを判定する（ステップＳ１１）。 When the determination unit 122 determines that the absolute value of Xout-Xin is equal to or less than the absolute value of Youout-Yin (S10: YES), the determination unit 122 determines whether or not the value obtained by Youout-Yin is 0 or more (step S11). ..
　判定部１２２は、Ｙｏｕｔ－Ｙｉｎで求まる値が０以上である（Ｓ１１：ＹＥＳ）と判定すると、前方向のジェスチャであると判定する（ステップＳ１２）。 If the determination unit 122 determines that the value obtained by Youout-Yin is 0 or more (S11: YES), it determines that the gesture is in the forward direction (step S12).
　また、判定部１２２は、ステップＳ１１においてＹｏｕｔ－Ｙｉｎで求まる値が０以上ではない（Ｓ１１：ＮＯ）と判定すると、後方向のジェスチャであると判定する（ステップＳ１３）。 Further, if the determination unit 122 determines in step S11 that the value obtained by Youout-Yin is not 0 or more (S11: NO), it determines that the gesture is in the backward direction (step S13).
　また、判定部１２２は、ステップＳ１０において、Ｘｏｕｔ－Ｘｉｎの絶対値がＹｏｕｔ－Ｙｉｎの絶対値以下ではない（Ｓ１０：ＮＯ）と判定すると、Ｘｏｕｔ－Ｘｉｎで求まる値が０以上であるかどうかを判定する（ステップＳ１４）。左右のいずれの方向へのジェスチャであるかを判定するためである。 Further, if the determination unit 122 determines in step S10 that the absolute value of Xout-Xin is not equal to or less than the absolute value of Yout-Yin (S10: NO), it determines whether or not the value obtained by Xout-Xin is 0 or more. Determination (step S14). This is to determine which direction the gesture is in, left or right.
　判定部１２２は、Ｘｏｕｔ－Ｘｉｎで求まる値が０以上である（Ｓ１４：ＹＥＳ）と判定すると、右方向のジェスチャであると判定する（ステップＳ１５）。 When the determination unit 122 determines that the value obtained by Xout-Xin is 0 or more (S14: YES), it determines that the gesture is in the right direction (step S15).
　また、判定部１２２は、ステップＳ１４においてＸｏｕｔ－Ｘｉｎで求まる値が０以上ではない（Ｓ１４：ＮＯ）と判定すると、左方向のジェスチャであると判定する（ステップＳ１６）。以上で一連の処理が終了する。 Further, when the determination unit 122 determines in step S14 that the value obtained by Xout-Xin is not 0 or more (S14: NO), it determines that the gesture is in the left direction (step S16). This completes a series of processes.
　以上のように、判定部１２２は、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときの静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３から求まる進入座標（Ｘｉｎ，Ｙｉｎ）と、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の全てが第２閾値未満になったときの静電容量Ｃｏｕｔ０、Ｃｏｕｔ１、Ｃｏｕｔ２、Ｃｏｕｔ３から求まる進出座標（Ｘｏｕｔ，Ｙｏｕｔ）とから、手Ｈのジェスチャを判定する。そして、このようなジェスチャの判定は、領域１１の周りに配置された電極１１０Ａ～１１３Ａを用いて実現可能である。 As described above, the determination unit 122 is an approach obtained from the capacitances Cin0, Cin1, Cin2, and Cin3 when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more. Coordinates (Xin, Yin) and advance coordinates (Xout, Yout) obtained from the capacitances Cout0, Cout1, Cout2, and Cout3 when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value. From, the gesture of the hand H is determined. Then, such a gesture determination can be realized by using the electrodes 110A to 113A arranged around the region 11.
　電極１１０Ａ～１１３Ａを測定して得られるＣ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときは、手Ｈが電極１１０Ａ～１１３Ａで囲まれる領域の外側にある。同様に、電極１１０Ａ～１１３Ａを測定して得られるＣ０、Ｃ１、Ｃ２、Ｃ３のうちの全てが第２閾値ＴＨ２未満になったときは、手Ｈが電極１１０Ａ～１１３Ａで囲まれる領域の外側にある。このため、電極１１０Ａ～１１３Ａで囲まれる領域よりも広い領域においてジェスチャを検出できる。換言すれば、ジェスチャを検出する領域のサイズがタッチパッドを用いてジェスチャを検出する領域のサイズと等しい場合には、電極１１０Ａ～１１３Ａが配置される領域をタッチパッドよりも小形化することができる。また、タッチパッドに比べると、電極の数が少ないことからより大きな電極１１０Ａ～１１３Ａを利用可能であるので、ジェスチャの検出感度を向上させることができる。検出感度が高いと、更に、小型化できる。 When any one of C0, C1, C2, and C3 obtained by measuring the electrodes 110A to 113A becomes equal to or higher than the first threshold value TH1, the hand H is outside the region surrounded by the electrodes 110A to 113A. .. Similarly, when all of C0, C1, C2, and C3 obtained by measuring the electrodes 110A to 113A are less than the second threshold value TH2, the hand H is outside the region surrounded by the electrodes 110A to 113A. be. Therefore, the gesture can be detected in a region wider than the region surrounded by the electrodes 110A to 113A. In other words, if the size of the area for detecting gestures is equal to the size of the area for detecting gestures using the touchpad, the area where the electrodes 110A to 113A are arranged can be made smaller than the touchpad. .. Further, since the number of electrodes is smaller than that of the touch pad, larger electrodes 110A to 113A can be used, so that the gesture detection sensitivity can be improved. If the detection sensitivity is high, the size can be further reduced.
　また、判定部１２２は、式（１）及び式（２）を用いてジェスチャの方向を判定する。式（１）及び式（２）は、電極１１０Ａ～１１３Ａで囲まれる領域の外側における進入座標と進出座標とを高精度に測定できる式である。このため、判定部１２２はジェスチャの方向を正確に判定することができる。 Further, the determination unit 122 determines the direction of the gesture using the equations (1) and (2). Equations (1) and (2) are equations capable of measuring the approach coordinates and the advance coordinates outside the region surrounded by the electrodes 110A to 113A with high accuracy. Therefore, the determination unit 122 can accurately determine the direction of the gesture.
　なお、判定部１２２は、測定回路１２１によって測定される静電容量Ｃ０～Ｃ３のすべてが検出閾値未満になったときに電極１１０Ａ～１１３Ａの各々について測定回路１２１によって複数回測定される値の平均値を求め、測定回路１２１によって電極１１０Ａ～１１３Ａの各々について静電容量Ｃ０～Ｃ３を測定する際の基準値として電極１１０Ａ～１１３Ａの各々についての平均値を測定回路１２１に設定してもよい。このようにすれば、測定回路１２１によって測定される静電容量Ｃ０～Ｃ３のすべてが検出閾値未満になったときに電極１１０Ａ～１１３Ａの各々について測定回路１２１に設定される基準値を更新することができる。測定回路１２１によって測定される静電容量Ｃ０～Ｃ３のすべてが検出閾値未満になったときに電極１１０Ａ～１１３Ａから得られる静電容量は、温度や周囲の環境の変化等によって変動するため、基準値を更新することによって、より高精度に静電容量Ｃ０～Ｃ３を測定することができる。また、この結果、高精度にジェスチャを判定することができる。 The determination unit 122 averages the values measured a plurality of times by the measurement circuit 121 for each of the electrodes 110A to 113A when all of the capacitances C0 to C3 measured by the measurement circuit 121 are less than the detection threshold. A value may be obtained, and an average value for each of the electrodes 110A to 113A may be set in the measurement circuit 121 as a reference value when measuring the capacitances C0 to C3 for each of the electrodes 110A to 113A by the measurement circuit 121. By doing so, when all of the capacitances C0 to C3 measured by the measuring circuit 121 become less than the detection threshold value, the reference value set in the measuring circuit 121 for each of the electrodes 110A to 113A is updated. Can be done. When all of the capacitances C0 to C3 measured by the measurement circuit 121 are less than the detection threshold, the capacitance obtained from the electrodes 110A to 113A varies depending on the temperature, changes in the surrounding environment, etc., and is therefore a reference. By updating the value, the capacitances C0 to C3 can be measured with higher accuracy. As a result, the gesture can be determined with high accuracy.
　以上では、ジェスチャ判定装置１００が４つの電極１１０Ａ～１１３Ａを含む形態について説明したが、電極の数は少なくとも２つあればよく、４つよりも多くてもよい。 In the above, the form in which the gesture determination device 100 includes four electrodes 110A to 113A has been described, but the number of electrodes may be at least two and may be more than four.
　また、以上では、ジェスチャ判定装置１００のコンピュータ１２０Ａが図５に示すようなフローチャートに含まれる判定処理を実行する判定部１２２を有する形態について説明したが、機械学習による判定を用いてもよい。 Further, although the computer 120A of the gesture determination device 100 has the determination unit 122 for executing the determination process included in the flowchart as shown in FIG. 5, the determination by machine learning may be used.
　図６は、実施形態の変形例によるジェスチャ判定装置１００Ｍを示す図である。ジェスチャ判定装置１００Ｍは、ジェスチャ検出部１２０が判定部１２２の代わりに判定部１２２Ｍを有する点が図１に示すジェスチャ判定装置１００と異なる。その他の構成は、ジェスチャ判定装置１００と同様である。このため、相違点についてのみ説明する。 FIG. 6 is a diagram showing a gesture determination device 100M according to a modified example of the embodiment. The gesture determination device 100M is different from the gesture determination device 100 shown in FIG. 1 in that the gesture detection unit 120 has the determination unit 122M instead of the determination unit 122. Other configurations are the same as those of the gesture determination device 100. Therefore, only the differences will be described.
　判定部１２２Ｍは、静電容量Ｃ０～Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときの静電容量Ｃ０～Ｃ３から得られる進入座標（Ｘｉｎ，Ｙｉｎ）と、全ての静電容量Ｃ０～Ｃ３が第２閾値ＴＨ２未満になったときの静電容量Ｃ０～Ｃ３とから得られる進出座標（Ｘｏｕｔ，Ｙｏｕｔ）を入力としてジェスチャの種類を出力とする決定木を有する。決定木の出力結果は、判定部１２２の判定結果と同一である。 The determination unit 122M includes the approach coordinates (Xin, Yin) obtained from the capacitances C0 to C3 when any one of the capacitances C0 to C3 becomes the first threshold value TH1 or more, and all the static electricity. It has a determination tree in which the advance coordinates (Xout, Youout) obtained from the capacitances C0 to C3 when the capacitances C0 to C3 become less than the second threshold value TH2 are input and the gesture type is output. The output result of the decision tree is the same as the determination result of the determination unit 122.
　図７は、ジェスチャ判定装置１００Ｍのコンピュータ１２０Ａが実行する処理を示すフローチャートである。図７に示す処理のうちのステップＳ１～Ｓ８は、図５に示すステップＳ１～Ｓ８と同一である。 FIG. 7 is a flowchart showing a process executed by the computer 120A of the gesture determination device 100M. Steps S1 to S8 of the processes shown in FIG. 7 are the same as steps S1 to S8 shown in FIG.
　判定部１２２Ｍは、進入座標（Ｘｉｎ，Ｙｉｎ）と進出座標（Ｘｏｕｔ，Ｙｏｕｔ）を決定木に入力して、ジェスチャの種類を出力する（ステップＳ９Ｍ）。ステップＳ９Ｍの処理によって、ジェスチャが判定される。 The determination unit 122M inputs the approach coordinates (Xin, Yin) and the advance coordinates (Xout, Youout) into the decision tree, and outputs the gesture type (step S9M). The gesture is determined by the process of step S9M.
　以上のように、判定部１２２Ｍは、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが第１閾値ＴＨ１以上になったときの静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３から求まる進入座標（Ｘｉｎ，Ｙｉｎ）と、静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３の全てが第２閾値未満になったときの静電容量Ｃｏｕｔ０、Ｃｏｕｔ１、Ｃｏｕｔ２、Ｃｏｕｔ３から求まる進出座標（Ｘｏｕｔ，Ｙｏｕｔ）とから、手Ｈのジェスチャを判定する。判定部１２２Ｍの出力は、利用者Ｈによって行われたジェスチャの判定結果を表しており、利用者の意図通りのジェスチャが判定される。 As described above, the determination unit 122M is an approach obtained from the capacitances Cin0, Cin1, Cin2, and Cin3 when any one of the capacitances C0, C1, C2, and C3 becomes the first threshold value TH1 or more. Coordinates (Xin, Yin) and advance coordinates (Xout, Yout) obtained from the capacitances Cout0, Cout1, Cout2, and Cout3 when all of the capacitances C0, C1, C2, and C3 are less than the second threshold value. From, the gesture of the hand H is determined. The output of the determination unit 122M represents the determination result of the gesture performed by the user H, and the gesture as intended by the user is determined.
　そして、このようなジェスチャの判定は、領域１１の周りに配置された電極１１０Ａ～１１３Ａを用いて実現可能である。領域１１よりも外側の位置でジェスチャを判断する。この為、ジェスチャを検出する領域のサイズよりも、ジェスチャ判定装置１００Ｍを小さくできる。したがって、小形化に対応可能なジェスチャ判定装置１００Ｍを提供することができる。 Then, such a gesture determination can be realized by using the electrodes 110A to 113A arranged around the region 11. The gesture is judged at a position outside the region 11. Therefore, the gesture determination device 100M can be made smaller than the size of the region for detecting the gesture. Therefore, it is possible to provide the gesture determination device 100M that can cope with miniaturization.
　以上、本発明の例示的な実施形態のジェスチャ判定装置について説明したが、本発明は、具体的に開示された実施形態に限定されるものではなく、特許請求の範囲から逸脱することなく、種々の変形や変更が可能である。 Although the gesture determination device according to the exemplary embodiment of the present invention has been described above, the present invention is not limited to the specifically disclosed embodiments and can be various without departing from the scope of claims. Can be transformed or changed.
　なお、本国際出願は、２０２０年７月１６日に出願した日本国特許出願２０２０－１２２２３７に基づく優先権を主張するものであり、その全内容は本国際出願にここでの参照により援用されるものとする。 This international application claims priority based on the Japanese patent application 2020-12223 filed on July 16, 2020, the entire contents of which are incorporated herein by reference. It shall be.
　１００、１００Ｍ　ジェスチャ判定装置
　１０　配線板
　１１０Ａ、１１１Ａ、１１２Ａ、１１３Ａ　電極
　１２０、１２０Ｍ　ジェスチャ検出部
　１２１　測定回路
　１２２、１２２Ｍ　判定部
　１２３　メモリ 100, 100M Gesture Judgment Device 10 Wiring Board 110A, 111A, 112A, 113A Electrode 120, 120M Gesture Detection Unit 121 Measurement Circuit 122, 122M Judgment Unit 123 Memory

Claims (11)

  1. 　配線板上に平行に設けられた複数の電極と、
    　前記複数の電極の各々を介して複数の静電容量を測定する測定回路と、
    　測定された前記複数の静電容量から被検出体のジェスチャを判定する判定部と
    　を含み、
    　前記判定部は、前記複数の静電容量のうちのいずれか１つが第１閾値以上になったときの前記複数の静電容量と、前記全ての静電容量が前記第１閾値以下の第２閾値未満になったときの前記複数の静電容量とから、被検出体のジェスチャを判定する、ジェスチャ判定装置。     Multiple electrodes provided in parallel on the wiring board,
    A measurement circuit that measures a plurality of capacitances via each of the plurality of electrodes,
    Includes a determination unit that determines the gesture of the object to be detected from the plurality of measured capacitances.
    The determination unit includes the plurality of capacitances when any one of the plurality of capacitances is equal to or higher than the first threshold value, and the second plurality of capacitances having all the capacitances equal to or lower than the first threshold value. A gesture determination device that determines the gesture of the object to be detected from the plurality of capacitances when the value becomes less than the threshold value.
  2. 　前記複数の電極は、前記配線板上で長方形の四辺に相当する位置に設けられた４本の電極であり、
    　前記判定部は、前記長方形の各辺の方向に前記被検出体を移動させるジェスチャを検出可能である、請求項１に記載のジェスチャ判定装置。     The plurality of electrodes are four electrodes provided at positions corresponding to the four sides of a rectangle on the wiring board.
    The gesture determination device according to claim 1, wherein the determination unit can detect a gesture that moves the object to be detected in the direction of each side of the rectangle.
  3. 　前記４本の電極は、前記長方形の四隅の角部には入らないように配置される、請求項２に記載のジェスチャ判定装置。 The gesture determination device according to claim 2, wherein the four electrodes are arranged so as not to enter the corners of the four corners of the rectangle.
  4. 　前記長方形の２つの長辺に相当する位置にそれぞれ設けられる２本の電極を介して測定される静電容量が前記第２閾値以上になる領域は、互いに重なっている、請求項２又は３に記載のジェスチャ判定装置。 2. The described gesture determination device.
  5. 　前記長方形の四辺のうち対向する２本の電極の各々を介して前記測定回路によって測定される２つの静電容量をＣ０、Ｃ１とし、
    　前記長方形の四辺のうち対向する別の２本の電極の各々を介して前記測定回路によって測定される２つの静電容量をＣ２、Ｃ３とし、
    　前記４つの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３のうちのいずれか１つが前記第１閾値以上になったときの前記４つの静電容量をＣｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３とし、
    　前記４つの静電容量Ｃ０、Ｃ１、Ｃ２、Ｃ３が前記第２閾値未満になったときの前記４つの静電容量をＣｏｕｔ０、Ｃｏｕｔ１、Ｃｏｕｔ２、Ｃｏｕｔ３とすると、
    　前記判定部は、
    　前記４つの静電容量Ｃｉｎ０、Ｃｉｎ１、Ｃｉｎ２、Ｃｉｎ３と次式（１）とに基づいて進入座標を求め、
    　前記４つの静電容量Ｃｏｕｔ０、Ｃｏｕｔ１、Ｃｏｕｔ２、Ｃｏｕｔ３と次式（２）とに基づいて進出座標を求め、
    　前記進入座標から前記進出座標に向かうベクトルに基づいて前記被検出体のジェスチャを判定する、請求項２乃至４のいずれか１項に記載のジェスチャ判定装置。
    （Ｘｉｎ，Ｙｉｎ）＝（Ｃｉｎ３／（Ｃｉｎ３＋Ｃｉｎ２），Ｃｉｎ０／（Ｃｉｎ０＋Ｃｉｎ１））　　　（１）
    （Ｘｏｕｔ，Ｙｏｕｔ）＝（Ｃｏｕｔ３／（Ｃｏｕｔ３＋Ｃｏｕｔ２），Ｃｏｕｔ０／（Ｃｏｕｔ０＋Ｃｏｕｔ１））　　　（２）     Let C0 and C1 be the two capacitances measured by the measuring circuit via each of the two opposing electrodes of the four sides of the rectangle.
    Let C2 and C3 be the two capacitances measured by the measuring circuit via each of the two opposing electrodes of the four sides of the rectangle.
    When any one of the four capacitances C0, C1, C2, and C3 becomes equal to or higher than the first threshold value, the four capacitances are defined as Cin0, Cin1, Cin2, and Cin3.
    Let Cout0, Cout1, Cout2, and Cout3 be the four capacitances when the four capacitances C0, C1, C2, and C3 are less than the second threshold value.
    The determination unit
    The approach coordinates are obtained based on the four capacitances Cin0, Cin1, Cin2, Cin3 and the following equation (1).
    The advance coordinates are obtained based on the four capacitances Cout0, Cout1, Cout2, Cout3 and the following equation (2).
    The gesture determination device according to any one of claims 2 to 4, wherein the gesture of the detected object is determined based on a vector from the approach coordinates to the advance coordinates.
    (Xin, Yin) = (Cin3 / (Cin3 + Cin2), Cin0 / (Cin0 + Cin1)) (1)
    (Xout, Youout) = (Cout3 / (Cout3 + Cout2), Cout0 / (Cout0 + Cout1)) (2)
  6. 　前記判定部は、前記ベクトルが前記４本の電極で囲まれる領域内を通らない場合は、前記被検出体のジェスチャを判定しない、請求項５に記載のジェスチャ判定装置。 The gesture determination device according to claim 5, wherein the determination unit does not determine the gesture of the detected object when the vector does not pass through the region surrounded by the four electrodes.
  7. 　前記判定部は、前記進入座標又は前記進出座標が前記４本の電極で囲まれる領域内にある場合は、前記被検出体のジェスチャを判定しない、請求項５又は６に記載のジェスチャ判定装置。 The gesture determination device according to claim 5 or 6, wherein the determination unit does not determine the gesture of the detected object when the approach coordinates or the advance coordinates are in the region surrounded by the four electrodes.
  8. 　前記判定部は、前記複数の静電容量のうちのいずれか１つが前記第１閾値以上になったときの前記複数の静電容量と、前記全ての静電容量が前記第１閾値以下の前記第２閾値未満になったときの前記複数の静電容量とを用いる決定木によって、前記被検出体のジェスチャを判定する、請求項１乃至４のいずれか１項に記載のジェスチャ判定装置。 The determination unit includes the plurality of capacitances when any one of the plurality of capacitances is equal to or higher than the first threshold value, and the plurality of capacitances having all the capacitances equal to or lower than the first threshold value. The gesture determination device according to any one of claims 1 to 4, wherein the gesture of the detected object is determined by a determination tree using the plurality of capacitances when the value becomes less than the second threshold value.
  9. 　前記判定部は、前記測定回路によって測定される測定値のすべてが検出閾値未満になったときに前記複数の電極の各々について前記測定回路によって複数回測定される測定値の平均値を求め、
    　前記測定回路によって前記複数の電極の各々について前記測定値と前記平均値との差を前記静電容量とみなす、請求項１乃至８のいずれか１項に記載のジェスチャ判定装置。     The determination unit obtains the average value of the measured values measured a plurality of times by the measuring circuit for each of the plurality of electrodes when all the measured values measured by the measuring circuit are less than the detection threshold.
    The gesture determination device according to any one of claims 1 to 8, wherein the difference between the measured value and the average value for each of the plurality of electrodes is regarded as the capacitance by the measuring circuit.
  10. 　前記第１閾値と前記第２閾値が等しいことを特徴とする請求項１乃至９のいずれか１項に記載のジェスチャ判定装置。 The gesture determination device according to any one of claims 1 to 9, wherein the first threshold value and the second threshold value are equal to each other.
  11. 　前記第２閾値は、前記第１閾値よりも小さいことを特徴とする請求項１乃至９のいずれか１項に記載のジェスチャ判定装置。 The gesture determination device according to any one of claims 1 to 9, wherein the second threshold value is smaller than the first threshold value.
PCT/JP2021/019519 2020-07-16 2021-05-24 Gesture identifying device WO2022014160A1 (en)

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