WO2022209477A1 - 操作検出装置 - Google Patents
操作検出装置 Download PDFInfo
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- WO2022209477A1 WO2022209477A1 PCT/JP2022/007784 JP2022007784W WO2022209477A1 WO 2022209477 A1 WO2022209477 A1 WO 2022209477A1 JP 2022007784 W JP2022007784 W JP 2022007784W WO 2022209477 A1 WO2022209477 A1 WO 2022209477A1
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- 238000001514 detection method Methods 0.000 title claims abstract description 127
- 230000000737 periodic effect Effects 0.000 claims abstract description 4
- 238000010586 diagram Methods 0.000 description 23
- 239000002131 composite material Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
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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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/955—Proximity switches using a capacitive detector
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
Definitions
- the present invention relates to an operation detection device.
- a control device for controlling a display device including a plurality of gate lines and a plurality of common electrodes shared for image display and touch detection, the first acquisition unit acquiring a specific frequency to be avoided; a second acquisition unit that acquires the drive frequency of the gate signal supplied to the plurality of gate lines; a change unit that changes the drive frequency when the acquired specific frequency and the drive frequency satisfy a change condition;
- the conventional control device does not describe in what period the drive frequency is changed. If the drive frequency is changed during the period in which the presence or absence of an operation is detected based on capacitance as in touch detection, there is a risk that the detection accuracy will decrease due to changes in the characteristics of the detection circuit.
- the detection of the frequency that should be avoided is also detected in the same way as the determination of the presence or absence of operation. It is necessary to reduce the influence of such noise in order to implement it in the device.
- the detection device may erroneously determine that a touch has been performed when noise is picked up.
- the object is to reduce the influence of noise and provide an operation detection device with high detection accuracy.
- An operation detection device includes an electrostatic sensor, a drive circuit that outputs a drive signal to the electrostatic sensor in order to detect an operator's operation on the electrostatic sensor, and an output of the electrostatic sensor. a control unit that determines whether or not the operation is performed based on the value and controls the drive waveform of the drive signal, wherein the control unit includes a detection period during which the operation is detected and a non-detection period during which the operation is not detected.
- the drive waveform is controlled with a period of a predetermined period including a detection period, the drive waveform has a shape based on a periodic function that repeats a constant pattern throughout the period, and the control unit controls the The phase of the drive signal during the detection period is changed by controlling the characteristics of the drive waveform.
- FIG. 1 is a diagram showing an example of a configuration of an operation detection device 100;
- 4A and 4B are diagrams showing an example of an output waveform of a detection circuit 121 and a detection value of a control section 130 during a sensing period;
- FIG. 10 is a diagram showing an example of a change over time of a detected value change ⁇ AD in a state where an operator does not perform an operation and there is noise;
- FIG. 5 is a diagram showing an example of a composite wave obtained by superimposing a drive signal for an electrostatic sensor and noise having a frequency close to the frequency of the drive signal; 7 is a diagram showing an example of detection values obtained by the composite wave shown in FIG. 6;
- FIG. 10 is a diagram illustrating an example of a method for identifying noise having a frequency close to the drive frequency of the drive signal;
- FIG. 4 is a diagram showing an example of detection values obtained by a composite wave of a drive signal and noise; It is a figure explaining an example of the relationship between the phase difference of a drive signal and noise, and a synthetic wave. It is a figure explaining an example of the method of shifting the phase difference of noise.
- FIG. 4 is a diagram illustrating an example of a period (frequency change period) during which frequency hopping is performed in a sensing cycle
- FIG. 10 is a diagram illustrating an example of the effect of randomly changing the phase difference between a drive signal and noise by frequency hopping
- It is a figure explaining an example of the adjustment method of the phase difference by a modification.
- FIG. 1 is a diagram illustrating an example of an operation detection device 100 according to an embodiment.
- the operation detection device 100 is mounted on a vehicle as an example, and an electrostatic sensor 110 is mounted inside.
- the operation detection device 100 detects whether the driver's hand H is touching the electrostatic sensor 110 . Determining whether or not the driver's hand H is touching the electrostatic sensor 110 is determining whether or not the driver has operated the operation detection device 100 .
- the driver of the vehicle will be referred to as the operator of the operation detection device 100.
- the operation detection device 100 is not limited to being incorporated into a vehicle.
- the operation detection device 100 capable of determining whether or not the operator is touching an object provided with the electrostatic sensor 110 will be described below.
- the operation of the operator to touch the object provided with the electrostatic sensor 110 is referred to as the operator's operation.
- FIG. 2 is a diagram showing an example of the configuration of the operation detection device 100. As shown in FIG.
- the operation detection device 100 includes an electrostatic sensor 110 , a circuit section 120 and a control section 130 .
- the electrostatic sensor 110 has a capacitor Cs between the sensor electrode and GND potential.
- a capacitor C1 corresponding to the hand H is connected to the electrostatic sensor 110 in order to show a state in which the operator performs an operation with the hand H.
- the electrostatic sensor 110 is connected to the detection circuit 121 of the circuit section 120 .
- the circuit section 120 has a detection circuit 121 and a drive circuit 122 .
- the detection circuit 121 detects the capacitance of the electrostatic sensor 110 , performs filtering and amplification, and outputs the result to the control unit 130 .
- the driving circuit 122 outputs to the electrostatic sensor 110 a driving waveform having a shape based on a periodic function, such as a sine wave or a rectangular wave, repeating a certain pattern over the entire period in a section having a period of a predetermined period.
- a sinusoidal AC waveform is output, and an electrical signal obtained via the electrostatic sensor 110 is filtered and amplified in the detection circuit 121 .
- the control unit 130 is realized by a microcomputer as an example.
- a microcomputer is implemented by a computer including a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), an input/output interface, an internal bus, and the like.
- CPU Central Processing Unit
- RAM Random Access Memory
- ROM Read Only Memory
- the control unit 130 has an AD (Analog to Digital) conversion unit 131 and a counter 132 .
- the AD conversion unit 131 and the counter 132 represent functions of the program executed by the control unit 130 as functional blocks.
- the AD converter 131 converts the output of the detection circuit 121 into a digital value.
- the output of the AD converter 131 is the capacitance detected by the electrostatic sensor 110 .
- the counter 132 counts the amount of change ⁇ AD in the output of the AD conversion section 131 and outputs it as the amount of change ⁇ AD in the detected value.
- the circuit unit 120 and the control unit 130 are realized by an IC (Integrated Circuit) chip as an example.
- FIG. 3 is a diagram showing an example of a sensing cycle.
- a sensing cycle is a cycle in which the operation detection device 100 detects the capacitance of the electrostatic sensor 110, and is composed of a non-sensing period and a sensing period.
- the non-sensing period is an example of a non-detection period
- the sensing period is an example of a detection period.
- a period of one sensing period is an example of a predetermined period including a detection period and a non-detection period.
- the non-sensing period is, for example, a period during which detection values detected during the sensing period are processed.
- one sensing period is 10 milliseconds (msec)
- the non-sensing period is a predetermined period from the start of the period
- the sensing period is the remaining period after the non-sensing period ends.
- the operation detection device 100 detects the capacitance of the electrostatic sensor 110 during the sensing period and does not detect the capacitance during the non-sensing period.
- FIG. 4 is a diagram showing an example of the output waveform of the detection circuit 121 and the detection value of the control section 130 during the sensing period.
- the output waveforms and detection values shown in FIG. 4 are in a state where the operator is not performing an operation (a state in which the operation detection device 100 is not detecting the operator's hand H or the like) and no noise.
- the output waveforms of the detection circuit 121 are the same in a plurality of consecutive sensing periods, and the detection values generated by AD conversion by the control unit 130 are also constant. A constant detected value is thus obtained in the absence of noise.
- the output waveform of the electrostatic IC 120 changes, and the detected value also changes.
- FIG. 5 is a diagram showing an example of the change over time of the change amount ⁇ AD of the detected value when the operator does not operate and there is noise.
- the horizontal axis is time (seconds), and shows characteristics over 4 seconds as an example.
- the vertical axis indicating the amount of change ⁇ AD indicates the threshold used by the control unit 130 to determine whether or not there is an operation. When the amount of change ⁇ AD becomes equal to or greater than the threshold, it is determined that an operation is being performed.
- the characteristics shown in FIG. 5 will be described as those obtained in the operation detection device for comparison, not in the operation detection device 100 .
- the operation detection device for comparison has an electrostatic sensor 110 and a circuit section 120 like the operation detection device 100 .
- the noise is picked up by the electrostatic sensor 110, so the amount of change ⁇ AD in the detected value fluctuates.
- the detected value change ⁇ AD becomes zero.
- the noise frequency is close to the drive frequency of the drive signal, the detected value change ⁇ AD changes slowly at a pace of about 2 to 3 times per second as shown in FIG. In this way, if there is a change of about 2 to 3 times per second, the characteristics will be similar to the state in which the operator performed the operation in the absence of noise, so there is a risk of erroneously detecting that the operation has been performed. .
- FIG. 6 is a diagram showing a composite wave in which the drive signal and noise are superimposed.
- FIG. 6(C) shows the driving signal shown in FIG. 6(A) and the noise shown in FIG. 6(B) superimposed on each other. Modulation) Makes the waveform look like it has been modulated.
- FIG. 7 is a diagram showing an example of detection values obtained by the composite wave shown in FIG. A composite wave is obtained as an output waveform of the detection circuit 121 .
- the detection value obtained from the combined wave of the drive signal and noise changes sinusoidally with the passage of time. If there is noise even if the operator does not perform an operation, the noise is picked up by the electrostatic sensor 110, so the detected value change ⁇ AD fluctuates, for example, as shown in FIG. In this way, when the amount of change ⁇ AD in the detected value fluctuates at relatively large time intervals, there is a risk of erroneously detecting that an operation has been performed.
- the drive signal and noise can be distinguished from noise inside the circuit unit 120 and removed by a filter or the like.
- noise having a frequency close to the drive frequency of the drive signal of the drive circuit 122 exists, it is impossible to remove the noise. difficult.
- the operation detection device 100 of the embodiment when noise having a frequency close to the drive frequency of the drive signal is generated, the detection value obtained in the sensing period of the sensing period cannot be generated by human operation. By changing the pattern, it is possible to distinguish between the detection value based only on human operation and the synthetic wave containing noise having a frequency close to the drive frequency of the drive signal.
- FIG. 8 is a diagram explaining an example of a method of distinguishing noise having a frequency close to the drive frequency of the drive signal.
- FIG. 8A shows the same waveform as the time change of the detected value change ⁇ AD shown in FIG.
- the time change of the detected value change ⁇ AD shown in FIG. 8(A) is obtained when the operator does not perform any operation and there is noise of a frequency very close to the drive frequency of the drive signal. be.
- the horizontal axis is time (milliseconds), and the change ⁇ AD changes randomly every 10 milliseconds.
- the operation detection device 100 of the embodiment determines whether or not the change amount ⁇ AD is possible due to human operation, and thus changes the change amount ⁇ AD due to noise as a change in the change amount ⁇ AD due to human operation. discern.
- FIG. 9 is a diagram showing an example of detection values obtained by a composite wave of a drive signal and noise.
- a composite wave is obtained as an output waveform of the detection circuit 121 .
- the detected value is the same as in FIG. 8(B).
- the amount of change ⁇ AD in the detection value fluctuates randomly. In this way, the change ⁇ AD that randomly fluctuates with a period of several tens of milliseconds or less cannot be realized by human operation, so it can be identified that the change ⁇ AD is due to noise. .
- FIG. 10 is a diagram explaining an example of the relationship between the phase difference of the drive signal and noise and the composite wave.
- the composite wave shown in FIG. 10 is the same as the composite wave shown in FIG. In FIG. 10, the composite wave is shown on the upper side, and the waveforms and phase differences of the drive signal and noise are shown on the lower side.
- the phase difference of noise with respect to the driving signal is 135 degrees, -160 degrees, -15 degrees, -180 degrees, -160 degrees, 120 degrees, -180 degrees, 15 degrees, 135 degrees, - 160 degrees and 20 degrees. If the phase difference of the noise with respect to the driving signal can be randomly shifted in this way, the synthetic wave of the driving signal and the noise can be changed randomly for each sensing period, and the amount of change ⁇ AD can be changed randomly. can be done.
- FIG. 11 is a diagram explaining an example of a method of shifting the phase difference of noise with respect to the drive signal.
- FIG. 11 shows an example of waveforms of the drive signal and noise output by the circuit unit 120 of the operation detection device 100 .
- the drive frequency of the drive signal is temporarily changed by frequency hopping.
- the drive frequency of the drive signal is temporarily changed to a different frequency by frequency hopping.
- the drive frequency of the drive signal is changed to a different frequency by frequency hopping from time t1 to period T1.
- the noise frequency does not change.
- the driving signal and the noise are out of phase.
- the drive frequency of the drive signal is returned to the original frequency.
- the drive frequency of the drive signal can be changed in this way. Since the drive circuit 122 can change only the frequency without changing the amplitude, distortion is unlikely to occur, and the influence of deterioration of radiation noise when changing the frequency is slight. At times t1 and t2, the frequency can be changed while maintaining the continuity of the waveform of the driving signal.
- the driving frequency of the driving signal before frequency hopping and the frequency of noise may be hopped to a frequency different from that of the noise, so the same effect can be obtained at any frequency.
- FIG. 12 is a diagram illustrating an example of a period (frequency change period) during which frequency hopping is performed in a sensing cycle.
- the control unit 130 AD-converts the output of the detection circuit 121 in the sensing period of the sensing period, and calculates the change amount ⁇ AD of the detection value. Therefore, the phase difference between the drive signal and the noise should be shifted during the sensing period. Since the sensing period is a period for calculating the amount of change ⁇ AD, it is not preferable to perform frequency hopping within the sensing period.
- frequency hopping is performed during the non-sensing period. In this way, it is possible to shift the phase difference between the drive signal and noise during the sensing period, and since there is no change in the waveform of the drive signal during the sensing period, it is possible to change the detected value by changing the drive frequency. ⁇ AD is not affected.
- the operation detection device 100 performs frequency hopping within the non-sensing period in each sensing cycle, for example, so that the phase difference between the drive signal and the noise changes randomly within the sensing period in each sensing cycle.
- the phase difference between the drive signal and the noise can be changed randomly as shown in FIG. 10, which cannot be realized by human operation.
- the detected value ⁇ AD can be changed quickly and randomly.
- the frequency change period for changing the frequency in frequency hopping within the non-sensing period may be set as follows.
- the phase difference between the driving signal and the noise at time t1 in FIG. 11 immediately before frequency hopping may be adjusted within the range of 0 degrees to 360 degrees.
- the phase difference between the drive signal and noise at the end of the frequency change period and the sensing period start Although it is strictly different from the phase difference between the driving signal and the noise at the point in time, the frequency difference between the driving signal and the noise is so small that it can be ignored.
- FIG. 13 is a diagram illustrating an example of the effect of randomly changing the phase difference between the drive signal and noise by frequency hopping.
- FIG. 13A shows the change ⁇ AD of the detected value when the frequency hopping of the drive signal is not performed for comparison.
- the amount of change ⁇ AD is ⁇ 1500 in count value.
- FIG. 13(B) shows the amount of change ⁇ AD in the detected value when frequency hopping of the drive signal is performed. It can be seen that the amount of change ⁇ AD changes randomly and frequently. Since such a quick random change cannot be realized by human operation, it is possible to determine that the change amount ⁇ AD has changed due to noise.
- the amount of change ⁇ AD is a count value of ⁇ 1500.
- the phase difference between the drive signal and noise is changed randomly at a pace of several tens of milliseconds or less during the sensing period following the non-sensing period.
- the change amount ⁇ AD of the detection value changes due to human operation
- the number of changes is several times per second at most, and the change amount ⁇ AD does not change quickly and randomly. Therefore, based on the change in the detected value change ⁇ AD, the change in the change ⁇ AD due to noise and the change in the change ⁇ AD due to human operation can be discriminated and detected.
- the influence of noise can be reduced by changing the drive frequency of the drive signal over the entire period (frequency hopping).
- control unit 130 changes the frequency of the drive waveform of the drive signal during the non-sensing period, it is possible to change the phase difference between the drive signal and noise during the sensing period.
- frequency hopping is performed to change the frequency during the non-sensing period, the frequency of the drive signal is constant during the sensing period, and the waveform of the drive signal during the sensing period does not change. no impact.
- control unit 130 randomly changes the frequency of the drive signal in the non-sensing period for each sensing cycle, the change ⁇ AD of the detection value changes randomly, and the change ⁇ AD of the detection value due to human operation changes. becomes easier to distinguish. As a result, the influence of noise can be reduced, and the operation detection device 100 with higher detection accuracy can be provided.
- control unit 130 controls the level at which it can be determined that the change in the detection value ⁇ AD during the sensing period is a change due to noise, which is generated for determining whether or not there is an operation based on the output value of the electrostatic sensor 110 . Since the drive frequency of the drive signal in the non-sensing period is changed so as to cause a change, the change in the detection value change ⁇ AD due to noise and the change in the detection value ⁇ AD due to human operation can be reliably distinguished. can be done. As a result, the influence of noise can be reduced, and the operation detection device 100 with even higher detection accuracy can be provided.
- the change in the level that can be determined as the change in the detected value ⁇ AD due to noise is the change in the detected value change ⁇ AD at a speed that cannot be realized by human operation, the change in the detected value due to noise does not occur.
- a change in the amount of change ⁇ AD can be discerned more reliably. As a result, the influence of noise can be reduced, and the operation detection device 100 with extremely high detection accuracy can be provided.
- control unit 130 adjusts the phase difference between the drive signal and the noise at the start point of the sensing period within the range of 0 degrees to 360 degrees, the phase difference between the drive signal and the noise at the start point of the sensing period can be reliably adjusted. can be adjusted.
- a condition (predetermined condition) for performing frequency hopping may be provided in the output value of the electrostatic sensor 110 .
- the output value of the electrostatic sensor 110 will be of a very large level.
- Frequency hopping may be performed to prepare for the sensing period when the controller 130 detects that it exhibits intermittent noise.
- the phase difference between the noise and the drive signal can be adjusted, and the change in the detection value ⁇ AD due to noise and the human It is possible to more efficiently and reliably distinguish between the change in the detected value due to the operation and the change in ⁇ AD.
- FIG. 14 is a diagram illustrating an example of a phase difference adjustment method according to a modification.
- the sensing period is 10 milliseconds
- the non-sensing period is a predetermined period from the start of the period
- the sensing period is the remaining period after the non-sensing period ends.
- the drive signal drives only during the sensing period.
- a phase difference between noise and the drive signal can be adjusted by providing a timing adjustment period at the beginning of the sensing period and adjusting the timing to start driving the drive signal. For example, by changing the length of the timing adjustment period for each sensing cycle, when noise is detected, the amount of change ⁇ AD in the detected value can be changed quickly and randomly. As a result, it is possible to reliably distinguish between the change in the detection value ⁇ AD due to noise and the change in the detection value ⁇ AD due to human operation. As a result, the influence of noise can be reduced, and the operation detection device 100 with high detection accuracy can be provided.
- REFERENCE SIGNS LIST 100 operation detection device 110 electrostatic sensor 120 circuit section 121 detection circuit 122 drive circuit 130 control section
Abstract
Description
図1は、実施形態の操作検出装置100の一例を示す図である。図1に示すように、操作検出装置100は、一例として車両に搭載され、内部に静電センサ110が実装されている。操作検出装置100は、一例として運転者の手Hが静電センサ110に触れているかどうかを検出する。運転者の手Hが静電センサ110に触れているかどうかを判定することは、運転者による操作検出装置100の操作の有無を判定することである。
110 静電センサ
120 回路部
121 検出回路
122 駆動回路
130 制御部
Claims (7)
- 静電センサと、
前記静電センサに対する操作者の操作を検出するために前記静電センサに駆動信号を出力する駆動回路と、
前記静電センサの出力値に基づき前記操作の有無を判断するとともに、前記駆動信号の駆動波形を制御する制御部と
を含み、
前記制御部は、前記操作の検出を行う検出期間と、前記操作の検出を行わない非検出期間とを含む所定期間を周期として前記駆動波形を制御し、
前記駆動波形は前記周期の全体にわたって一定のパターンを繰り返す周期関数に基づく形状であり、
前記制御部は、前記非検出期間における前記駆動波形の特性を制御することで前記検出期間における前記駆動信号の位相を変更する、操作検出装置。 - 前記制御部は、前記特性を制御することとして、前記非検出期間における前記駆動信号の周波数を変化させる、請求項1に記載の操作検出装置。
- 前記制御部は、前記周期毎に前記非検出期間における前記駆動信号の周波数をランダムに変化させる、請求項2に記載の操作検出装置。
- 前記制御部は、前記静電センサの出力値に基づいて前記操作の有無を判断するために生成する検出値の前記検出期間における変化がノイズによる変化であると判別可能なレベルの変化になるように、前記非検出期間における前記駆動信号の周波数を変化させる、請求項2又は3に記載の操作検出装置。
- 前記ノイズによる変化であると判別可能なレベルの変化は、人間の操作によって実現不能な速度での前記検出値の変化である、請求項4に記載の操作検出装置。
- 前記制御部は、前記静電センサの出力値が所定条件を満たした場合に、前記非検出期間における前記駆動信号の周波数を変化させる、請求項2乃至5のいずれか1項に記載の操作検出装置。
- 前記制御部は、前記検出期間の始点における前記駆動信号とノイズとの位相差を0度から360度の範囲内に設定するために、前記非検出期間における前記駆動信号の周波数を変化させる期間を調整する、請求項6に記載の操作検出装置。
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CN202280021590.9A CN117043542A (zh) | 2021-04-01 | 2022-02-25 | 操作检测装置 |
US18/461,800 US20230418420A1 (en) | 2021-04-01 | 2023-09-06 | Operation detection device |
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US20130194225A1 (en) * | 2012-02-01 | 2013-08-01 | Maxim Integrated Products, Inc. | Touch panel excitation using a drive signal having time-varying characteristics |
US20180052558A1 (en) * | 2016-08-19 | 2018-02-22 | Qualcomm Incorporated | Capacitance-to-voltage modulation circuit |
JP2020154836A (ja) * | 2019-03-20 | 2020-09-24 | パナソニックIpマネジメント株式会社 | 表示システムおよび制御方法 |
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AU2013259384B2 (en) | 2012-05-09 | 2016-06-02 | Biogen Ma Inc. | Nuclear transport modulators and uses thereof |
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- 2022-02-25 DE DE112022001910.7T patent/DE112022001910T5/de active Pending
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130194225A1 (en) * | 2012-02-01 | 2013-08-01 | Maxim Integrated Products, Inc. | Touch panel excitation using a drive signal having time-varying characteristics |
US20180052558A1 (en) * | 2016-08-19 | 2018-02-22 | Qualcomm Incorporated | Capacitance-to-voltage modulation circuit |
JP2020154836A (ja) * | 2019-03-20 | 2020-09-24 | パナソニックIpマネジメント株式会社 | 表示システムおよび制御方法 |
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JPWO2022209477A1 (ja) | 2022-10-06 |
CN117043542A (zh) | 2023-11-10 |
US20230418420A1 (en) | 2023-12-28 |
DE112022001910T5 (de) | 2024-01-25 |
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