WO2015104752A1 - Dispositif à actionnement capacitif - Google Patents

Dispositif à actionnement capacitif Download PDF

Info

Publication number
WO2015104752A1
WO2015104752A1 PCT/JP2014/006056 JP2014006056W WO2015104752A1 WO 2015104752 A1 WO2015104752 A1 WO 2015104752A1 JP 2014006056 W JP2014006056 W JP 2014006056W WO 2015104752 A1 WO2015104752 A1 WO 2015104752A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
threshold
value
time
change
Prior art date
Application number
PCT/JP2014/006056
Other languages
English (en)
Japanese (ja)
Inventor
勝次 山内
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2014002001A external-priority patent/JP2015130122A/ja
Priority claimed from JP2014172674A external-priority patent/JP6331880B2/ja
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2015104752A1 publication Critical patent/WO2015104752A1/fr

Links

Images

Classifications

    • 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
    • H03K17/962—Capacitive touch switches
    • H03K17/9622—Capacitive touch switches using a plurality of detectors, e.g. keyboard
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/96062—Touch switches with tactile or haptic feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960785—Capacitive touch switches with illumination

Definitions

  • the present disclosure relates to a capacitive operation device that is operated by contact with an operating body (for example, a user's fingertip).
  • an operating body for example, a user's fingertip
  • Patent Document 1 discloses a capacitance-type operation device that includes an operation plate that forms an operation surface that is touch-operated by a user's fingertip, and an electrode that is disposed on the back side of the operation plate. This operation device acquires a detection value corresponding to the amount of change in capacitance generated between the electrode and the fingertip, and when the acquired detection value exceeds a predetermined threshold value, a contact operation is performed. And turn on.
  • the contact area between the fingertip and the operation surface is smaller than when the fingertip is strongly pressed against the operation surface, so the detection value is small. Therefore, if the threshold value is set low, an ON determination can be made simply by lightly touching the operation surface, thereby improving operability.
  • the detection value will appear large. If the threshold value is lowered as described above, it will be turned on only by bringing the fingertip close without touching the operation surface. An erroneous determination such as being determined occurs. Therefore, it is necessary to set the threshold value in view of the balance between suppression of erroneous determination due to individual differences among operators and improvement in operability.
  • the capacitance-type operation device disclosed in Patent Document 1 includes an operation plate that forms a plurality of operation surfaces that are touched by a user's fingertips, and an electrode that is disposed on the back side of the operation plate. This operation device acquires a detection value corresponding to the amount of change in capacitance generated between the electrode and the fingertip, and when the acquired detection value exceeds a predetermined threshold value, a contact operation is performed. And turn on.
  • the fingertip is pressed against the operation plate in order to ensure the contact of the fingertip under vibration during vehicle travel.
  • the threshold value since the case where the detected value exceeds the threshold value is likely to occur, even if the threshold value is set higher, erroneous operation cannot be sufficiently suppressed.
  • the threshold value when the vehicle is stopped, the chance of making the fingertip touch the wrong operation surface decreases, so when the threshold value is set high, the lightness of touching and detecting the desired operation surface is impaired. It is desirable to set.
  • the present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a capacitance type operation device that can realize both suppression of erroneous determination and improvement in operability. Another object of the present disclosure is to provide a capacitance type operating device that can satisfy both of erroneous operation suppression and operational lightness.
  • the capacitance-type operation device is in contact with an operation plate that forms an operation surface that is operated to be touched by the operation body, and a contact operation that the operation body contacts the operation surface, or an operation surface. It is assumed that the operation body includes a contact determination unit that determines that a separation operation that leaves the operation surface has been performed.
  • an electrode located on the opposite side of the operating body with respect to the operating surface, a detection unit for acquiring a detection value corresponding to the amount of change in capacitance generated between the operating body and the electrode, and a change rate of the detection value
  • An abrupt change determination unit that determines whether or not a sudden change phenomenon in which the change amount per unit time of the change speed is equal to or greater than a predetermined amount has occurred during a change period in which is greater than or equal to the predetermined speed.
  • the contact determination unit determines that a contact operation or a separation operation has been performed on the condition that the sudden change determination unit has determined that a sudden change phenomenon has occurred.
  • the capacitance type operating device it is determined that the contact operation or the separation operation has been performed on the condition that a sudden change phenomenon in which the change rate of the detection value increases during the change period of the detection value appears. Therefore, the presence or absence of the contact operation or the separation operation can be determined with high accuracy. Therefore, it is possible to realize both suppression of erroneous determination and improvement in operability.
  • the capacitance-type operation device is in contact with an operation plate that forms an operation surface that is operated to be touched by the operation body, a contact operation that the operation body contacts the operation surface, or an operation surface.
  • the contact determination unit that determines that the operation body is separated from the operation surface, the electrode positioned on the opposite side of the operation surface with respect to the operation surface, and the capacitance generated between the operation body and the electrode.
  • a detection unit that acquires a detection value corresponding to the amount of change.
  • the contact determination unit determines that a contact operation or a separation operation has been performed on the condition that the change speed of the detection value when the detection value changes so as to cross a predetermined threshold is equal to or higher than the predetermined speed.
  • the capacitance type operation device it is determined that a contact operation or a separation operation has been performed on the condition that the change speed of the detection value when the detection value changes so as to cross the threshold is equal to or higher than a predetermined speed. . Therefore, the presence or absence of the contact operation or the separation operation can be determined with high accuracy. Therefore, it is possible to realize both suppression of erroneous determination and improvement in operability.
  • a capacitance-type operation device is provided in a vehicle interior and has an operation plate that forms a plurality of operation surfaces that are contact-operated by the operation body, and the opposite side of the operation body to the operation surface
  • An electrode positioned at the position, a detection unit that acquires a detection value corresponding to the amount of change in capacitance that occurs between the operating body and the electrode, a threshold value for the detection value, and the detection value continuously exceeds the threshold value
  • the contact determination unit that determines that the operating body is in contact with the corresponding operation surface, and the threshold value and threshold time that are the determination values of the contact determination unit are affected by the operation of the operating body.
  • a changing unit is provided that changes based on information to be given.
  • the threshold value and the threshold time which are the determination values of the contact determination unit, are changed based on information that affects the operation of the operation tool. Therefore, it is possible to realize both suppression of erroneous operation and improvement of lightness of operation.
  • FIG. 1 is a perspective view showing a vehicle mounting position of a capacitive operation device according to an embodiment of the present disclosure
  • FIG. 2 is a front view of a capacitive operating device according to an embodiment of the present disclosure
  • 3 is a cross-sectional view taken along the line III-III in FIGS. 2, 9 and 15.
  • FIG. 4 is a diagram illustrating an aspect of a change in the detected value when the contact operation and the separation operation are performed.
  • FIG. 5 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the first embodiment of the present disclosure.
  • FIG. 6 is a flowchart illustrating a processing procedure for determining whether or not there is a separation operation in the first embodiment of the present disclosure.
  • FIG. 7 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the second embodiment of the present disclosure.
  • FIG. 8 is a flowchart illustrating a processing procedure for determining the presence or absence of a separation operation in the second embodiment of the present disclosure.
  • FIG. 9 is a front view of a capacitive operating device according to an embodiment of the present disclosure;
  • FIG. 10 is a diagram illustrating one aspect of capacitance change when the operation surface is touched.
  • FIG. 11 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the fourth embodiment of the present disclosure.
  • FIG. 11 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the fourth embodiment of the present disclosure.
  • FIG. 12 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the fifth embodiment of the present disclosure
  • FIG. 13 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the sixth embodiment of the present disclosure.
  • FIG. 14 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the seventh embodiment of the present disclosure.
  • FIG. 15 is a front view of a capacitive operating device according to the eighth embodiment of the present disclosure;
  • FIG. 16 is a flowchart illustrating a processing procedure for determining the presence or absence of a contact operation in the eighth embodiment of the present disclosure.
  • FIG. 1 is a perspective view of an instrument panel (instrument panel Vi) mounted on a vehicle V as viewed from the indoor side.
  • An electrostatic capacity type operating device Vo is assembled in the central portion of the instrument panel Vi in the left-right direction of the vehicle.
  • This electrostatic capacity type operating device Vo is premised on being operated by a vehicle occupant, and is disposed at a position that can be operated from either the driver seat Dr or the passenger seat Pa in the passenger compartment.
  • the electrostatic capacitance type operating device Vo includes an operation plate 10, an electrode sheet 20, and a printed wiring board 30 described below.
  • the operation plate 10 is a resin plate member and forms a decorative surface 10a visually recognized by the user.
  • the decorative surface 10 a has a plurality of operation surfaces 11, 12, 13, 14, 15, and 16. On these operation surfaces 11 to 16, characters, symbols, figures and the like representing the setting contents of the operation target are printed.
  • the operation target is an air conditioner 50 that air-conditions the interior of the vehicle. For example, activation of the air conditioner 50, air volume setting, temperature setting, and the like can be given as specific examples of the setting contents.
  • a command signal for instructing the corresponding device to operate is output, and the air conditioner 50 operates according to the content of the contact operation.
  • the electrode sheet 20 is affixed on the surface of the operation plate 10 opposite to the decorative surface 10a.
  • the electrode sheet 20 has a plurality of electrodes 21, 22, 23, 24, 25, and 26, and these electrodes 21 to 26 are held by a resin sheet 20a.
  • Each of the electrodes 21 to 26 is disposed so as to face the corresponding operation surface 11 to 16.
  • a printed wiring board 30 is disposed on the opposite side of the operation plate 10 with respect to the electrode sheet 20.
  • a plurality of light sources 31, 32, and 33 are mounted on the circuit board, and these light sources 31 to 33 are arranged to face the corresponding electrodes 21 to 26.
  • transparent electrodes such as indium tin oxide are employed.
  • a resin member having translucency is employed for the operation plate 10, and portions of the operation surfaces 11 to 16 that are not printed are transmitted and illuminated by the light sources 31 to 33.
  • a paint having a light shielding property is printed on the decorative surface 10a other than the operation surfaces 11 to 16.
  • the electrodes 21 to 26 output voltage changes that occur according to changes in capacitance as electrical signals. Electrical signals output from the electrodes 21 to 26 are input to a microcomputer 40 (hereinafter referred to as a microcomputer) mounted on the printed wiring board 30.
  • the microcomputer 40 includes a storage device that stores a program and a central processing unit that executes arithmetic processing according to the stored program.
  • the microcomputer 40 functions as a detection unit 41, a sudden change determination unit 42, a level determination unit 43, a continuation determination unit 44, a change unit 45, and a contact determination unit 46 described below by executing various arithmetic processes (See FIG. 2).
  • the electrostatic capacitance type operating device Vo includes a circuit that repeatedly charges and discharges the coupling capacitance formed by the electrodes 21 to 26, and the detection unit 41 counts the number of times of charging and discharging until a predetermined condition is satisfied.
  • the count value increases as the capacitance generated between the electrodes 21 to 26 and the fingertip F increases. Therefore, based on the count value, the detection unit 41 calculates a “detection value” corresponding to the amount of change in capacitance that occurs between the electrodes 21 to 26 and the fingertip F.
  • the count value when the fingertip F is sufficiently separated from the electrodes 21 to 26 is referred to as a reference value
  • the count value when the fingertip F is in the vicinity of the electrodes 21 to 26 or the contact position is calculated as the detected value.
  • FIG. 4 shows a detection waveform representing a time change of the detection value. From this detected waveform, high frequency components due to electrical noise or the like are removed.
  • the sudden change determination unit 42 determines whether or not a waveform (rapid change waveform) described below appears in the rising change period Tup or the decrease change period Tdw of the detected waveform.
  • the detected value gradually increases as the fingertip F approaches the operation surfaces 11 to 16.
  • the period from t1 to t4 is referred to as a rising change period Tup.
  • the increase speeds V1 and V2 of the detected value are equal to or higher than the predetermined speed Vth.
  • the increasing speeds V1 and V2 of the detected value in the rising change period Tup are rapidly increased at the time t2 when the fingertip F starts to contact the operation surfaces 11 to 16. This phenomenon is a sudden change phenomenon, and the waveform of the portion including the time t2 in the detected waveform corresponds to the sudden change waveform.
  • the detected value gradually decreases as the fingertip F moves away from the operation surfaces 11 to 16. I will do it.
  • This period from t5 to t8 is called a decrease change period Tdw.
  • the absolute values of the detection value decrease speeds V3 and V4 are equal to or higher than a predetermined speed Vth.
  • the decrease rate of the detection value is large, and the time t7 when the fingertip F is completely separated from the operation surfaces 11 to 16 Thereafter, the decrease rate of the detected value becomes gentle.
  • the decrease speeds V3 and V4 of the detected value in the decrease change period Tdw are rapidly decreased at time t7 when the fingertip F is separated from the operation surfaces 11 to 16. This phenomenon is a sudden change phenomenon, and the waveform of the portion including the time t7 in the detected waveform corresponds to the sudden change waveform.
  • C1 is ⁇ 0 ⁇ ⁇ r1 ⁇ S / d1
  • C2 is ⁇ 0 ⁇ ⁇ r2 ⁇ S / d2.
  • ⁇ 0 is the dielectric constant of vacuum
  • ⁇ r1 is the relative dielectric constant of the operation plate 10 which is a substance (interelectrode medium) interposed between the electrode and the fingertip F
  • S is the lap area of the electrode area and the fingertip F as a parallel plate capacitor
  • D1 represents the thickness of the operation plate 10.
  • ⁇ r2 represents the relative permittivity of air as an interelectrode medium
  • d2 represents the distance between the fingertip F and the operation plate 10.
  • the operation plate 10 corresponds to the interelectrode medium.
  • air interposed between the operation plate 10 and the fingertip F also corresponds to the interelectrode medium. Accordingly, the capacitance detected at the time t2 when the contact state is switched to the contact state is rapidly increased, and the capacitance detected at the time t7 when the contact state is switched to the non-contact state is rapidly decreased.
  • the contact area S is small because the fingertip F only touches the operation surface 11 lightly.
  • the fingertip F is crushed and the contact area S increases.
  • the fingertip F pressed against the operation surface 11 is released during the period from t5 to t7, so that the contact area S decreases.
  • the level determination unit 43 determines whether or not a high level state where the detected value exceeds a predetermined threshold Cth (see FIG. 4) appears in the rising change period Tup or the decreasing change period Tdw.
  • a predetermined threshold Cth see FIG. 4
  • the detected value increases and reaches a predetermined threshold Cth at time t3 after time t2 in the increase change period Tup.
  • the detection value decreases and reaches the threshold value Cth at time t6 before time t7 in the decrease change period Tdw. That is, it is in the high level state during the period from t3 to t6.
  • the continuation determination unit 44 determines whether or not the high level state has been maintained for a predetermined duration Tth (see FIG. 4) after the time point t3 when the state has changed to the high level state in the rising change period Tup. Further, the continuation determination unit 44 determines whether or not the normal level state has been maintained for the duration Tth or more after time t6 when the detection value has changed to the normal level state where the detection value is less than the threshold Cth during the decrease change period Tdw. .
  • the duration Tth is changed by the changing unit 45 according to the user's operation status.
  • the microcomputer 40 acquires whether or not the vehicle V is traveling as information on the operation status. For example, information on whether or not the vehicle V is traveling is acquired as operation status information. If the vehicle is traveling, it can be said that it is an operation situation (unstable operation situation) in which the fingertip F is less likely to be positioned at the intended position due to running vibration of the vehicle V. On the other hand, when traveling is stopped, it can be said that there is no traveling vibration, so that the operation state (stable operation state) is easily determined at the intended position of the fingertip F.
  • the changing unit 45 changes the duration Tth in the unstable operation situation (during travel) to a time longer than the duration Tth in the stable operation situation (during travel stop).
  • the contact determination unit 46 determines whether a contact operation or a separation operation has been performed based on the determination results of the sudden change determination unit 42, the level determination unit 43, and the continuation determination unit 44.
  • the microcomputer 40 changes the setting content of the air conditioner 50 associated with the corresponding operation surface. Specific examples of the setting include the above-described activation of the air conditioner, air volume setting, temperature setting, and the like.
  • the microcomputer 40 outputs a command signal corresponding to the above setting to the air conditioner 50 and controls the operation of the air conditioner 50.
  • the electrostatic capacity type operating device Vo can also function the audio device 51 and the navigation device 52 as an operation target. In this case, the microcomputer 40 outputs a command signal corresponding to the setting content by the capacitance type operating device to the audio device 51 and the navigation device 52, and controls the operation of these devices 51 and 52.
  • the microcomputer 40 After the continuation time Tth has elapsed from the time point t3, the microcomputer 40 performs an increment process according to the time during which the high level state is maintained (long press time). For example, the longer the long press time, the higher the increment value, and the air volume setting and temperature setting values are changed corresponding to the increment value. This increment processing ends when it is determined that the separation operation has been performed.
  • FIG. 5 is a flowchart showing a processing procedure for determining whether or not a contact operation has been performed by the above-described units 41, 42, 43, 44, 45, and 46. This processing is repeated by the microcomputer 40 at a predetermined cycle. Executed.
  • the white circle in FIG. 4 has shown the sampling value of the detected value, and the code
  • the determination by the sudden change determination unit 42 is performed in subsequent S11. That is, it is determined whether or not a sudden change waveform in which the change amount per unit time of the change rate of the detected value appears more than the predetermined amount ⁇ Vth appears during the rising change period Tup. Specifically, when the difference between the current increase speed V2 and the previous increase speed V1 is equal to or greater than a predetermined amount ⁇ Vth, it is determined that a sudden change waveform has appeared.
  • the determination by the level determination unit 43 is performed in subsequent S12. That is, it is determined whether or not a high level state has occurred during the rising change period Tup. Specifically, when the current detection value is equal to or greater than the threshold value Cth, it is determined that the state is the high level state.
  • the changing unit 45 changes the duration Tth according to the vehicle speed. Specifically, the duration Tth is set according to whether the vehicle is stopped at zero speed, is traveling at a low speed below a predetermined speed, or is traveling at a high speed above a predetermined speed. It has been changed in three stages. When traveling, the duration Tth is set longer than when the vehicle is stopped. In addition, the duration time Tth is set longer during high speed travel than during low speed travel.
  • the determination by the continuation determination unit 44 is performed. That is, it is determined whether or not the duration Tth has elapsed while maintaining a high level state in which the detection value is equal to or greater than the threshold value Cth. If it is determined that the high level state is maintained for the duration time Tth, it is determined in the next S15 that the contact operation has been performed. Then, the switch signal associated with the operation surface on which the contact operation is performed is turned on. If a negative determination is made in at least one of S10, S11, S12, and S14, it is not determined that the contact operation has been performed.
  • FIG. 6 is a flowchart showing a processing procedure for determining whether or not the separation operation has been performed by the above-described units 41, 42, 43, 44, 45, and 46. This processing is repeated by the microcomputer 40 at a predetermined cycle. Executed. First, in S20 of FIG. 6, it is determined whether or not the detected value sampled this time is sampled during the decrease change period Tdw. Specifically, when the difference between the current detection value and the previous detection value is greater than or equal to a predetermined value, the absolute values of the current decrease speeds V3 and V4 are greater than or equal to the predetermined speed Vth. It is determined that it is the decrease change period Tdw.
  • the determination by the sudden change determination unit 42 is performed. That is, it is determined whether or not a sudden change waveform in which the change amount per unit time of the change rate of the detection value appears more than the predetermined amount ⁇ Vth during the decrease change period Tdw is determined. Specifically, when the difference between the absolute value of the previous decrease speed V3 and the absolute value of the previous decrease speed V4 is equal to or greater than a predetermined amount ⁇ Vth, it is determined that a sudden change waveform has appeared.
  • the determination by the level determination unit 43 is performed in subsequent S22. That is, it is determined whether or not a high level state appears during the decrease change period Tdw. Further, it is determined whether or not the high level state has changed to the normal level state. Specifically, if the detected value is equal to or greater than the threshold value Cth, it is determined that a high level state has appeared. Then, when the previous detection value is equal to or greater than the threshold Cth and the current detection value is less than the threshold Cth, it is determined that the high level state has changed to the normal level state.
  • the change unit 45 changes the duration Tth according to the vehicle speed. Specifically, the duration Tth is set according to whether the vehicle is stopped at zero speed, is traveling at a low speed below a predetermined speed, or is traveling at a high speed above a predetermined speed. It has been changed in three stages. When traveling, the duration Tth is set longer than when the vehicle is stopped. In addition, the duration time Tth is set longer during high speed travel than during low speed travel.
  • the determination by the continuation determination unit 44 is performed. That is, it is determined whether or not the duration Tth has elapsed while maintaining the normal level state where the detection value is less than the threshold value Cth. If it is determined that the normal level state is maintained for the duration time Tth, it is determined in the next S25 that the separation operation has been performed. Then, the switch signal associated with the operation surface on which the separation operation is performed is turned off. If a negative determination is made in at least one of S20, S21, S22, and S24, it is not determined that the separation operation has been performed.
  • the detected value changes in inverse proportion to the distance between the operation body and the electrode until the operation body comes into contact with the operation surface (see t1 to t2). Therefore, if the moving speed of the operating tool is constant, the change speed of the detection value changes in inverse proportion to the separation distance. However, after the contact operation is performed, even if the moving speed of the operating body is constant, the change rate of the detected value increases rapidly (see t2 to t4). In the process of separating, the detected value changes in inverse proportion to the distance between the operating body and the electrode after the operating body is separated from the operation surface (see t7 to t8). However, until the operating body moves away from the operating surface, the change rate of the detected value increases rapidly (see t5 to t7).
  • the change rate of the detected value changes abruptly before and after the operating body contacts or leaves the operating surface.
  • the degree of sudden change in the detected value is not easily influenced by individual differences among operators. Nevertheless, when the operating body is brought close to the operation surface but is not brought into contact, for example, when the contact operation is stopped halfway, the sudden change phenomenon does not appear. In addition, when the operating body is slightly moved away from the operating surface while being in contact with the operating surface by weakening the force that presses the operating body against the operating surface, for example, when the separation operation is stopped halfway, the sudden change phenomenon is Does not appear.
  • the capacitance type operating device it is determined that the contact operation or the separation operation has been performed on the condition that a sudden change phenomenon in which the change rate of the detection value increases during the change period of the detection value appears. Therefore, the presence or absence of the contact operation or the separation operation can be determined with high accuracy. Therefore, it is possible to realize both suppression of erroneous determination and improvement in operability.
  • the detected value changes rapidly as the relative dielectric constant ⁇ r and the contact area S change rapidly. That is, a sudden change waveform appears in the detected waveform.
  • the presence or absence of the sudden change waveform is not easily affected by the individual difference of the fingertip F, and when the fingertip F is not brought into contact with the operation surface 11 or the separation operation is stopped halfway, the sudden change waveform is generated. Does not appear.
  • the presence / absence of a contact operation or a separation operation is determined on condition that an abrupt change waveform appears. Therefore, the determination can be made with high accuracy. Therefore, it is possible to realize both suppression of erroneous determination and improvement in operability.
  • a sudden change waveform may appear even though no contact operation is performed.
  • the detected value is not in the high level state that is equal to or higher than the threshold value Cth. It is assumed that the sudden change in the ambient temperature occurs when high temperature outside air flows into the room by opening the door during cooling of the vehicle interior or when low temperature outside air flows during heating.
  • the contact operation has been performed on the condition that the high level state appears in the rising change period Tup in addition to the condition of sudden change waveform appearance.
  • the separation operation has been performed on the condition that the high level state appears in the decrease change period Tdw in addition to the condition for the sudden change waveform appearance. Therefore, it is possible to reduce the risk of erroneous determination due to electrical noise or a sudden change in ambient temperature. Even if it is determined that the state is the high level state, it is not determined that the contact operation or the separation operation is performed unless the appearance of the sudden change waveform is detected.
  • the threshold value Cth used for the determination of the high level state can be set to a value sufficiently lower than the threshold value used for the contact determination in Patent Document 1. Therefore, in this embodiment, it can suppress that determination of a high level state becomes a different result resulting from the individual difference of the fingertip F.
  • a continuation determination unit 44 that determines whether the high level state or the normal level state has been maintained for a predetermined duration Tth or longer is provided. Then, in addition to the condition of sudden change waveform appearance, it is determined that the contact operation has been performed on the condition that the high level state is maintained for the duration Tth or longer. Further, it is determined that the separation operation has been performed on the condition that the normal level state is maintained for the duration Tth or longer.
  • the threshold value Cth used in the stable operation situation is set in consideration of the balance between suppression of erroneous determination caused by individual differences among operators and improvement in operability. That is, if the threshold value Cth is set low, it is promoted that the ON determination is made only by lightly touching the operation surface, and the operability is improved. On the other hand, when the operator's fingertip F is large or the fingertip F is wet with sweat, the detected value appears large. Therefore, if the threshold value Cth is excessively lowered, it is turned on only by bringing the fingertip F close to the operation surface. Opportunities for misjudgment such as being judged increase.
  • the duration Tth can be changed longer in an unstable operation status. Therefore, it is possible to suppress the ON determination at the time of an erroneous operation without changing the threshold value Cth extremely high. Therefore, without erroneously reducing the balance between the reduction of misjudgment caused by individual differences between operators and the improvement of operability such as turning on just by lightly touching the operation surface, it is possible to turn on at the time of an erroneous operation in an unstable operation situation. Judgment can be suppressed.
  • the duration Tth is changed by the changing unit 45. It can be said that it is an operation situation (unstable operation situation) in which the fingertip F is less likely to be positioned at the intended position as the traveling vibration is larger. Therefore, the duration Tth can be changed with good timing when an unstable operation situation occurs.
  • the duration Tth is changed to a longer time as the traveling vibration is larger. Therefore, the greater the degree that the fingertip F is less likely to be positioned at the intended position, the more the duration Tth value is changed to a value that makes it difficult to determine the touch operation or the separation operation. Therefore, it is possible to avoid excessive ON determination suppression during erroneous operation in unstable operation situations, and unnecessarily balance the balance between suppression of erroneous determination due to individual differences between operators and improvement in operability. Can be avoided.
  • the present embodiment if it is not the rising change period Tup, it is not determined as a touch operation even if a sudden change waveform appears. Therefore, even when a sudden change waveform appears due to noise or the like in a period in which the detection value before time t1 in FIG. 4 hardly changes, erroneous determination that the touch operation has been performed is suppressed. Similarly, since it is not determined as a separation operation even if a sudden change waveform appears unless the change period Tdw, an erroneous determination that the separation operation has been performed due to noise or the like is suppressed.
  • the presence or absence of the contact operation or the separation operation is determined on the condition that the suddenly changing waveform appears.
  • the contact operation or separation is performed on the condition that the increase speed V2 and decrease speed V3 of the detection value when the detection value changes so as to cross the threshold value Cth is equal to or higher than the predetermined speed Vtha. Determine if there is an operation.
  • the hardware configuration of the capacitive operating device according to the present embodiment is the same as that of the first embodiment.
  • the duration Tth is changed in the same manner as S13 in FIG.
  • subsequent S33 as in S14 of FIG. 5, it is determined whether or not the duration Tth has elapsed while maintaining the high level state in which the detected value is equal to or greater than the threshold value Cth. If it is determined that the high level state is maintained for the duration time Tth, it is determined in the next S34 that the contact operation has been performed. Then, the switch signal associated with the operation surface on which the contact operation is performed is turned on. If a negative determination is made in at least one of S30, S31, and S33, it is not determined that the contact operation has been performed.
  • the decrease rate (change rate) of the detected value at the time of the decrease change is equal to or higher than a predetermined speed Vtha set in advance. judge. Specifically, the difference between the current sampling value and the previous sampling value is regarded as the change speed in the sampling period ta, and whether or not the absolute value of the decrease speed V3 calculated from the difference is equal to or higher than a predetermined speed Vtha. Determine.
  • the duration Tth is changed as in S23 of FIG.
  • subsequent S43 as in S24 of FIG. 6, it is determined whether or not the duration Tth has elapsed while maintaining the normal level state in which the detected value is less than the threshold value Cth. If it is determined that the normal level state is maintained for the duration time Tth, it is determined in the next S44 that the separation operation has been performed. Then, the switch signal associated with the operation surface on which the separation operation is performed is turned off. If a negative determination is made in at least one of S40, S41, and S43, it is not determined that the separation operation has been performed.
  • the detected value changes rapidly as the relative permittivity ⁇ r and the contact area S change rapidly. Therefore, in the process of performing the contact operation or the separation operation, there is a high possibility that the change speed of the detection value when the detection value changes across the threshold value Cth is equal to or higher than the predetermined speed Vtha.
  • the fingertip F is brought close to the operation surface 11 but not touched or when the separation operation is stopped halfway, even if the detection value changes across the threshold value Cth, the detection value does not change suddenly. The change speed at that time is likely to be less than the predetermined speed Vtha.
  • the change rate of the detected value changes abruptly before and after the operating body contacts or leaves the operating surface. Therefore, in the process of performing the contact operation, the increase speed (change speed) when the detection value increases beyond the threshold value is likely to be greater than the predetermined speed. In the process of performing the separation operation, the absolute value (change speed) of the decrease speed when the detection value decreases beyond the threshold value is likely to be greater than the predetermined speed.
  • the contact operation is performed on the condition that the increase speed V2 or the decrease speed V3 of the detection value when the detection value changes across the threshold value Cth is equal to or higher than the predetermined speed Vtha. Or the presence or absence of separation operation is determined. Therefore, the determination can be made with high accuracy. Therefore, it is possible to realize both suppression of erroneous determination and improvement in operability.
  • information (Dr / Pa information) indicating whether the operator of the capacitive operating device Vo is an occupant seated in the driver seat Dr or the passenger seat Pa of the vehicle V is acquired. For example, if it is determined on which side the operator is an occupant based on the detection results of an infrared sensor or camera that detects the movement of the upper body of the occupant, seating sensors provided in the driver's seat Dr and the passenger seat Pa, etc. Good.
  • the fingertip F is difficult to be settled at the intended position
  • a bad operation posture in addition to the case where the fingertip F is difficult to settle due to running vibration.
  • the occupant of the driver's seat Dr is limited in the degree of freedom of the operation posture as compared with the occupant of the passenger seat Pa. Therefore, the fingertip F is less likely to be set at the intended position than the occupant of the passenger seat Pa. Therefore, in the present embodiment, when the passenger on the driver's seat Dr side is operating, the duration Tth is set longer than when the passenger on the passenger seat Pa side is operating.
  • the duration Tth is made longer than in the case of the operation by the passenger's seat Pa side occupant. Become so.
  • the fingertip is often pressed against the operation plate in order to ensure the contact of the fingertip under vibration during vehicle travel.
  • the threshold value since the case where the detected value exceeds the threshold value is likely to occur, even if the threshold value is set higher, erroneous operation cannot be sufficiently suppressed.
  • the threshold value when the vehicle is stopped, the chance of making the fingertip touch the wrong operation surface decreases, so when the threshold value is set high, the lightness of touching and detecting the desired operation surface is impaired. It is desirable to set.
  • the present inventor uses, in addition to whether or not the detected value exceeds the threshold value, the length of time that the state in which the detected value exceeds the threshold value continues for determining contact between the operating tool and the operating surface.
  • the electrostatic capacity type operating device disclosed in the following embodiment was completed by making the threshold value and the length of time variable.
  • the electrodes 21 to 26 output voltage changes that occur according to changes in capacitance as electrical signals.
  • the electrical signals output from the electrodes 21 to 26 are input to a microcomputer 140 (hereinafter referred to as a microcomputer) mounted on the printed wiring board 30.
  • the microcomputer 140 includes a storage device that stores a program and a central processing unit that executes arithmetic processing according to the stored program.
  • the microcomputer 140 functions as a detection unit 141, a contact determination unit 142, an acquisition unit 143, and a change unit 144 described below by executing various arithmetic processes (see FIG. 9).
  • the electrostatic capacitance type operating device Vo includes a circuit that repeatedly charges and discharges the coupling capacitance formed by the electrodes 21 to 26, and the detection unit 141 counts the number of times of charging and discharging until a predetermined condition is satisfied.
  • the count value increases as the capacitance generated between the electrodes 21 to 26 and the fingertip F increases. Therefore, based on the count value, the detection unit 141 calculates a “detection value” corresponding to the amount of change in capacitance that occurs between the electrodes 21 to 26 and the fingertip F.
  • the count value when the fingertip F is sufficiently separated from the electrodes 21 to 26 is referred to as a reference value
  • the count value when the fingertip F is in the vicinity of the electrodes 21 to 26 or the contact position is calculated as the detected value.
  • the contact determination unit 142 determines whether or not a contact operation is performed based on the detection value calculated by the detection unit 141. Specifically, when the state where the detected value exceeds the predetermined thresholds THa and THb continues for a predetermined time (threshold times Wa and Wb), it is determined that the corresponding operation surface is touched. .
  • FIG. 10 shows the change over time of the detected value when a certain operation surface 11 is touched with the fingertip F.
  • the detected value increases as the fingertip F approaches the operation surface 11. After the time t12 when the fingertip F starts contact, the detected value increases rapidly for the reason described below.
  • C1 is ⁇ 0 ⁇ ⁇ r1 ⁇ S / d1
  • C2 is ⁇ 0 ⁇ ⁇ r2 ⁇ S / d2.
  • ⁇ 0 is the dielectric constant of vacuum
  • ⁇ r1 is the relative dielectric constant of the operation plate 10 which is a substance (interelectrode medium) interposed between the electrode and the fingertip F
  • S is the lap area of the electrode area and the fingertip F as a parallel plate capacitor
  • D1 represents the thickness of the operation plate 10.
  • ⁇ r2 represents the relative dielectric constant of air, which is a substance (interelectrode medium) interposed between the electrode and the fingertip F
  • d2 represents the distance between the fingertip F and the operation plate 10.
  • the operation plate 10 corresponds to the interelectrode medium.
  • the air interposed between the operation plate 10 and the fingertip F also corresponds to the interelectrode medium.
  • the detected value increases rapidly after the time t12. Compared with the period from time t11 to time t12, the amount of increase in the detected value per unit time is larger after time t12. Similarly, as the relative permittivity ⁇ r decreases and the contact area S decreases after the time t15, the detected value rapidly decreases after the time t15. Compared with the period from time t11 to time t12, the amount of increase in the detected value per unit time is larger after time t15.
  • the detected value exceeds the thresholds THa and THb at time t13 after time t12. Since the state where the detected values exceed the thresholds THa and THb continues from the time t13 to the time t14 when the threshold times Wa and Wb have elapsed, it is determined that the operation surface 11 is touched at time t4.
  • the crushed fingertip F is released, and the contact area between the fingertip F and the operation surface 11 decreases.
  • the detected value rapidly decreases.
  • the detected value further decreases after time t15 when the fingertip F moves away from the operation surface 11, and becomes zero at time t16. Compared with the period from time t15 to time t16, the amount of decrease in the detected value per unit time is larger before time t15.
  • the acquisition unit 143 acquires the operation status when the fingertip F is operated to touch the operation surfaces 11 to 16, that is, information that affects the operation of the fingertip F. Specifically, whether or not the vehicle V is traveling is acquired as the operation status.
  • the microcomputer 140 acquires vehicle speed information from an electronic control unit (engine ECU 53) that controls the operation of an internal combustion engine (engine) mounted on the vehicle V. Based on the vehicle speed information, it is determined whether or not the vehicle is traveling. If the vehicle is traveling, it can be said that it is an operation situation (unstable operation situation) in which the fingertip F is less likely to be positioned at the intended position due to running vibration of the vehicle V. On the other hand, when traveling is stopped, it can be said that there is no traveling vibration, so that the operation state (stable operation state) is easily determined at the position where the fingertip F is intended.
  • the operation surface 11 and the electrode 21 constitute a switch SW1
  • the operation surface 12 and the electrode 22 constitute a switch SW2
  • the operation surface 13 and the electrode 23 constitute a switch SW3
  • the operation surface 14 and the electrode 24 represent The switch SW4 is configured
  • the operation surface 15 and the electrode 25 configure a switch SW5
  • the operation surface 16 and the electrode 26 configure a switch SW6.
  • the changing unit 144 changes the threshold times Wa and Wb and the thresholds THa and THb used for the determination by the contact determining unit 142 according to the operation status acquired by the acquiring unit 143. Specifically, the threshold value THa in the unstable operation situation (traveling) is changed to a value higher than the threshold value THb in the stable operation situation (traveling stop). Further, the threshold time Wa in the unstable operation situation (running) is changed to a time longer than the threshold time Wb in the stable operation situation (running stop).
  • the microcomputer 140 changes the setting content of the air conditioner 50 associated with the operation surface determined to be in contact. Specific examples of the setting include the above-described activation of the air conditioner, air volume setting, temperature setting, and the like.
  • the microcomputer 140 outputs a command signal corresponding to the above setting to the air conditioner 50 and controls the operation of the air conditioner 50.
  • the electrostatic capacity type operating device Vo can also function the audio device 51 and the navigation device 52 as an operation target.
  • the microcomputer 140 outputs a command signal corresponding to the setting content by the capacitance type operation device to the audio device 51 and the navigation device 52, and controls the operation of these devices 51 and 52.
  • FIG. 11 is a flowchart showing a procedure of processing that the microcomputer 140 repeatedly executes at a predetermined cycle.
  • the acquisition unit 143 acquires the traveling speed (vehicle speed) of the vehicle.
  • the microcomputer 140 at the time of executing the processing of S110 provides a “vibration information acquisition unit” that acquires information related to running vibration of the vehicle V as information on the operation status.
  • subsequent S120 it is determined whether the vehicle is traveling based on the acquired vehicle speed. That is, if the vehicle speed is not zero, it is determined that the vehicle is traveling. If it is determined that the vehicle is traveling, it is determined in S30 whether the detected value is equal to or greater than a threshold THa for traveling.
  • This running threshold THa is the above-described value set by the changing unit 144.
  • the threshold time Wa for traveling is the above-described value set by the changing unit 144.
  • the process returns to S110 without performing input confirmation in S150.
  • the stop threshold THb is the above-described value set by the changing unit 144. If it is determined that the detected value ⁇ threshold value THb, in subsequent S170, it is determined whether or not the state of detected value ⁇ threshold value THb has exceeded the threshold time Wb for stopping. This stop time threshold time Wb is the above-described value set by the changing unit 144.
  • the process returns to S110 without performing input confirmation in S150.
  • the threshold times Wa and Wb and the thresholds THa and THb used for determining whether or not the operation surface is touched are compared with those in the stable operation situation in the unstable operation situation. Change the value to the side where contact is difficult to determine. The effect of this change will be described below.
  • the threshold value THb for stopping used in a stable operation situation is set in consideration of a balance between suppression of erroneous determination due to individual differences among operators and improvement in operability. That is, if the threshold value THb is set low, an ON determination can be made by lightly touching the operation surface, thereby improving operability. For example, if the state at the time t12 in FIG. 10 where contact is started continues for a threshold time, it is determined to be ON, and it is unnecessary to press the fingertip F to increase the contact area. On the other hand, when the operator's fingertip is large or when the fingertip is wet with sweat, the detected value appears large.
  • the threshold value THb is lowered as described above, it is determined to be ON only by bringing the fingertip closer to the operation surface. Incorrect determination such as that occurs. For example, the ON determination is made in a non-contact period from time t11 to time t12 in FIG.
  • the threshold time is changed longer. For this reason, it is possible to suppress the ON determination at the time of an erroneous operation without changing the threshold value extremely high. Therefore, without erroneously reducing the balance between the reduction of misjudgment caused by individual differences between operators and the improvement of operability such as turning on just by lightly touching the operation surface, it is possible to turn on at the time of an erroneous operation in an unstable operation situation. Judgment can be suppressed.
  • information relating to vehicle running vibration is acquired as an operation state, and the threshold value or the like is changed by the changing unit 144. It can be said that it is an operation situation (unstable operation situation) in which the fingertip F is less likely to be positioned at the intended position as the traveling vibration is larger. Therefore, the threshold value and the like can be changed with good timing when an unstable operation situation occurs.
  • the threshold time is changed to a longer time and the threshold value is changed to a larger value as the driving vibration is larger. Therefore, the greater the degree that the fingertip F is less likely to be positioned at the intended position, the more the value such as the threshold value is changed to a value that is less likely to be touched. Therefore, it is possible to avoid excessive ON determination suppression during erroneous operation in unstable operation situations, and unnecessarily balance the balance between suppression of erroneous determination due to individual differences between operators and improvement in operability. Can be avoided.
  • the presence / absence of travel of the vehicle is acquired as information related to travel vibration, and the threshold value and the like are changed according to whether travel is present. Since there is no running vibration when the running is stopped, it can be said that the operation is stable. Therefore, according to the present embodiment in which the threshold is changed according to whether or not the vehicle is traveling, the unstable operation situation and the stable operation situation can be clearly distinguished, and the effect of changing the threshold etc. in a timely manner when the unstable operation situation occurs. Is surely demonstrated.
  • the capacitance type operating device includes the changing unit 144 that changes the threshold value and the threshold time, which are the determination values of the contact determination unit 142, based on information that affects the operation of the operating tool.
  • the threshold value for the length of the time during which the threshold value continues to be high and the threshold value of the detection value is set longer than that when the vehicle is stopped, for example, under the vibration when the vehicle travels. The effect is demonstrated. For example, even if the operating body comes into contact with the operation surface under vibration when the vehicle travels and the detected value is higher than the threshold value, if the duration is short, it is not determined that the contact has been made, and thus erroneous determination of contact detection can be suppressed.
  • the following effect is exhibited by lowering the threshold value of the detection value compared to the vehicle running and shortening the threshold time with respect to the length of time during which the threshold value continues. For example, even when the operating body touches the operation surface lightly when the vehicle is stopped, the contact can be determined, so that the lightness of contact detection is not impaired.
  • the present disclosure is not limited to information relating to the driving state of the vehicle when the vehicle is running or when the vehicle is stopped as information that affects the operation of the operating body. For example, an erroneous determination of contact detection also occurs when the operating body is operated or when the occupant of the front passenger seat operates the operating body instead of the vehicle driver. Therefore, it goes without saying that the threshold value of the detection value and the threshold time may be changed based on information such as the operator's posture and the operator's distinction according to the seat.
  • the process of S121 shown in FIG. 12 is added to the embodiment shown in FIG. That is, when it is determined that the vehicle is traveling in S120, the threshold value THa and the threshold time Wa for traveling are changed in the next S121 according to the vehicle speed acquired in S110. Specifically, as the vehicle speed increases, it is considered that the driving vibration is large, and the threshold time Wa is set to a longer time and the threshold THa is set to a larger value.
  • the threshold value THa and the threshold time Wa are set to preset high-speed driving values. If the vehicle speed is less than a predetermined value, a threshold value THa and a threshold time Wa (for example, 20 ms) are set to a preset value for low-speed driving.
  • the threshold time Wb for stopping is set to a time (for example, 10 ms) shorter than the threshold time Wa for low speed driving.
  • the threshold time Wa and the threshold THa are set to values on the side where the contact determination is difficult as the running vibration is larger. Therefore, the threshold time Wa and the threshold value THa for traveling can be adjusted in accordance with the degree of traveling vibration so that the ON determination suppression during erroneous operation in an unstable operation situation does not become excessive.
  • the processes of S111, S122, and S123 shown in FIG. 13 are added to the embodiment shown in FIG. That is, in S111, the humidity in the passenger compartment is acquired.
  • the humidity in the passenger compartment is acquired using a detection value of a humidity sensor used for controlling the air conditioner 50.
  • the microcomputer 140 at the time of executing the process of S111 provides a “humidity information acquisition unit” that acquires information related to the atmospheric humidity on the operation surface as operation status information.
  • the threshold THa and the threshold time Wa for traveling are changed in the next S122 according to the humidity and the vehicle speed acquired in S111. If it is determined in S120 that the vehicle is not traveling, the threshold value THb for stopping is changed in the next S123 in accordance with the humidity acquired in S111.
  • the thresholds THa and THb are set higher and the threshold times Wa and Wb are set longer to suppress the erroneous determination.
  • the threshold THa and the threshold time Wa for traveling are changed according to the vehicle speed in the same manner as S121 in FIG. That is, as the vehicle speed increases, the threshold time Wa and the threshold value THa are set to values on the side where contact determination is difficult.
  • the threshold value THb for stopping at high humidity may be higher than the threshold value THa for traveling at low humidity. However, if the humidity is the same, the threshold value THb for stopping is set to be lower than the threshold value THa for traveling.
  • the threshold times Wa and Wb and the thresholds THa and THb are set to values that are less likely to be contact-determined. Therefore, it is possible to suppress erroneous determination such that the ON determination is made only by bringing the fingertip close to the operation surface.
  • the processes of S112, S124, and S125 shown in FIG. 14 are added to the embodiment shown in FIG. That is, in S112, information (Dr / Pa information) indicating whether the operator of the capacitive operating device Vo is a passenger seated in the driver seat Dr or the passenger seat Pa of the vehicle V is acquired. For example, if it is determined on which side the operator is an occupant based on the detection results of an infrared sensor or camera that detects the movement of the upper body of the occupant, seating sensors provided in the driver's seat Dr and the passenger seat Pa, etc. Good.
  • the microcomputer 140 at the time of executing the process of S112 acquires information on which of the driver side passenger and the passenger side passenger of the vehicle is operating the operation surface as operation status information. Department ".
  • the threshold THa and the threshold time Wa for traveling are changed in the next S124 according to the Dr / Pa information, humidity, and vehicle speed. If it is determined in S120 that the vehicle is not traveling, the threshold value THb and the threshold time Wb for stopping are changed in the next S125 according to the Dr / Pa information and the humidity.
  • the fingertip F is difficult to be settled at the intended position
  • a bad operation posture in addition to the case where the fingertip F is difficult to settle due to running vibration.
  • the occupant of the driver's seat Dr is limited in the degree of freedom of the operation posture as compared with the occupant of the passenger seat Pa. Therefore, the fingertip F is less likely to be set at the intended position than the occupant of the passenger seat Pa.
  • the thresholds THa and THb are set higher and the threshold time Wa, compared to the case where the occupant on the passenger seat Pa side is operating. Set Wb longer.
  • the threshold THa and the threshold time Wa for traveling are changed according to the vehicle speed and humidity in the same manner as S122 in FIG.
  • the threshold value THa for stopping and the threshold time Wa are changed according to the humidity in the same manner as in S123 of FIG.
  • the detection value is likely to exceed the threshold value. Therefore, it is not possible to sufficiently suppress the ON determination at the time of erroneous operation only by increasing the threshold value.
  • the contact time is likely to be shorter than in the intended operation.
  • the threshold times Wa and Wb and the threshold values THa and THb are less likely to be contacted in the operation by the driver's seat Dr side occupant than in the operation by the passenger seat Pa side occupant. Set to the side value. For this reason, it is possible to suppress the ON determination at the time of an erroneous operation without changing the threshold value extremely high. Therefore, it is possible to suppress the ON determination at the time of an erroneous operation in an unstable operation situation without greatly degrading the balance between the reduction of the erroneous determination described above and the improvement in operability.
  • the microcomputer 140 acquires vehicle speed information. Then, it is determined whether or not the vehicle is traveling based on the acquired vehicle speed information.
  • the microcomputer 140 acquires vibration information detected by the acceleration sensor (G sensor 54) as shown in FIG. Then, based on the acquired vibration information, it is determined whether or not the operation state is unstable.
  • the acquisition unit 143 according to the fourth embodiment acquires the vehicle speed as information that affects the operation of the fingertip F. Then, the changing unit 144 according to the fourth embodiment changes the threshold times Wa and Wb and the thresholds THa and THb used for the determination by the contact determining unit 142 based on the acquired vehicle speed.
  • the acquisition unit 430 according to the present embodiment acquires vibration information from the G sensor 54 as information that affects the operation of the fingertip F. Then, the changing unit 440 according to the present embodiment changes the threshold times Wa and Wb and the thresholds THa and THb based on the detection signal (G detection value) of the G sensor 54.
  • the G sensor 54 is attached to a body of the vehicle V that is located on the opposite side of the wheel with respect to the suspension, and detects the acceleration of the body. More specifically, the G sensor 54 that detects each of the vertical component, the vehicle V longitudinal component, and the vehicle V horizontal component of the acceleration is mounted on the vehicle V.
  • FIG. 16 is a flowchart showing a procedure of processing repeatedly executed by the microcomputer 140 according to the present embodiment at a predetermined cycle.
  • the G detection value of the G sensor 54 is acquired by the acquisition unit 430.
  • the microcomputer 140 at the time of executing the process of S110A provides a “vibration information acquisition unit” that acquires information related to running vibration of the vehicle V as information on the operation status.
  • the vibration level of the body of the vehicle V is calculated based on the acquired G detection value. For example, among accelerations detected by the G sensor 54, an average value of a vertical component, a longitudinal component, and a horizontal component is calculated, and the average value is set as a vibration level.
  • the detection value (electrostatic detection value) detected by the electrodes 21 to 26 is equal to or greater than the threshold value THa for unstable operation.
  • This threshold value THa is set to the same value as the threshold value THa for traveling described in the fourth embodiment. If it is determined that the electrostatic detection value ⁇ the threshold value THa, in the subsequent S140, it is determined whether or not the state of the electrostatic detection value ⁇ the threshold value THa has passed the threshold time Wa for unstable operation. This threshold time Wa is set to the same value as the threshold time Wa for traveling described in the fourth embodiment.
  • the process returns to S110A without performing input confirmation in S150.
  • the electrostatic detection value THb is set to the same value as the stop-time threshold value THb described in the fourth embodiment. If it is determined that the electrostatic detection value ⁇ the threshold value THb, in the subsequent S170, it is determined whether or not the state of the electrostatic detection value ⁇ the threshold value THb has passed the threshold time Wb for stable operation. This threshold time Wb is set to the same value as the stop time threshold time Wb described in the fourth embodiment.
  • the process returns to S110A without performing input confirmation in S150.
  • the threshold times Wa and Wb and the thresholds THa and THb used for determining whether or not the operation surface is touched are set to the threshold values in the case of an unstable operation situation with a large vibration level.
  • the threshold time is changed longer. Therefore, the same effect as the fourth embodiment is exhibited. That is, in an unstable operation situation, it is possible to suppress the ON determination at the time of erroneous operation without changing the threshold value extremely high.
  • the vibration information acquisition unit acquires the G detection value output from the G sensor 54 that detects the vibration of the vehicle as information related to running vibration. Therefore, it can be accurately determined whether or not an unstable operation situation exists.
  • each unit is expressed as S10, for example.
  • each part can be divided into a plurality of sub-parts, while the plurality of parts can be combined into one part.
  • each part configured in this manner can be referred to as a circuit, a device, a module, and a means.
  • each of the plurality of parts described above or a combination thereof includes not only (i) a software part combined with a hardware unit (for example, a computer) but also (ii) hardware (for example, an integrated circuit, As a part of the (wiring logic circuit), it can be realized with or without including the functions of related devices.
  • the hardware unit can be configured inside a microcomputer.
  • the touch operation is performed when all three conditions of appearance of a suddenly changing waveform (S11: YES), high level state (S12: YES), and continuation of the high level state (S14: YES) are satisfied. It is determined that. On the other hand, at least one of the two conditions such as the high level state and the continuation of the high level state may be abolished. Similarly, in the embodiment shown in FIG. 6, at least one of the two conditions such as the normal level state (S22: YES) and the continuation of the normal level state (S24: YES) may be abolished.
  • the predetermined speed Vth, threshold Cth and duration Tth used for various determinations are changed according to the humidity, erroneous determination can be suppressed and operability can be reduced. Compatibility with improvement can be improved. For example, the higher the humidity, the larger the predetermined speed Vth, the higher the threshold Cth, and the longer the duration Tth.
  • the vehicle speed is acquired as information related to the traveling vibration of the vehicle V, and the duration Tth is changed according to the vehicle speed.
  • the detection values of the sensors that detect the attitude of the vehicle V such as the pitching angle and yawing angle of the vehicle V, have a high correlation with the degree of vibration of the vehicle V, these detection values are acquired as information related to running vibration. May be.
  • the duration Tth is changed according to the operation status.
  • the predetermined speed Vth and the threshold value Cth used for various determinations may be changed according to the operation situation.
  • the duration time Tth is switched in three stages: stop, low speed travel and high speed travel. .
  • the switching may be performed in two stages at the time of stopping and traveling, or may be switched in four or more stages.
  • the detected value varies depending on the temperature.
  • the predetermined speed Vth, threshold Cth, and duration Tth used for various determinations may be changed according to the temperature.
  • the electrodes 21 to 26 are held inside the sheet 20a.
  • the electrodes 21 to 26 may be printed on the surface of the sheet 20a.
  • a self-capacitance type device is employed in which the capacitance of the electrodes 21 to 26 increases when the fingertip F is brought close to the electrodes 21 to 26.
  • a mutual capacitance method in which a receiving electrode is provided for each of the electrodes 21 to 26 may be adopted. In the mutual capacitance method, when the fingertip F is brought close to the electrodes 21 to 26, the electric field generated between the electrodes 21 to 26 and the receiving electrode is reduced, and the charge of the receiving electrode is reduced. The electrodes 21 to 26 or the receiving electrode output an electrical signal corresponding to the decrease in charge.
  • the present disclosure is applied to the capacitive operating device Vo mounted on the vehicle V, but the present disclosure is not limited to the one mounted on the vehicle V.
  • the user's fingertip F is operated while being in contact with the operation surfaces 11 to 16, and the fingertip F is used as the operating body.
  • the user may hold a pen-shaped operation member and operate it by bringing the operation member into contact with the operation surfaces 11 to 16.
  • an operation member other than the human body functions as the operation body.
  • the gloves function as an operating body.
  • the vehicle speed is acquired as information related to the traveling vibration of the vehicle V.
  • the detection values of the sensors that detect the attitude of the vehicle V such as the pitching angle and yawing angle of the vehicle V, have a high correlation with the degree of vibration of the vehicle V, these detection values are acquired as information related to running vibration. May be.
  • both the threshold time Wa and the threshold THa are adjusted according to the running vibration.
  • the threshold value THa may be set to a constant value regardless of the magnitude of the traveling vibration
  • the threshold time Wa may be adjusted according to the magnitude of the traveling vibration.
  • the threshold adjustment is effective for the purpose of suppressing misjudgment, whereas the threshold time adjustment is more effective than the threshold adjustment for the purpose of suppressing the on-determination during erroneous operation. It is.
  • both the threshold time Wa and the threshold THa are adjusted according to the humidity.
  • the threshold time Wa may be set to a constant value regardless of the humidity, and the threshold THa may be adjusted according to the humidity.
  • the threshold time adjustment is effective for the purpose of suppressing the ON judgment at the time of erroneous operation, whereas the threshold adjustment is more effective than the threshold time adjustment for the purpose of suppressing the erroneous determination. That's why.
  • the threshold value THa and the threshold time Wa when setting the threshold value THa and the threshold time Wa according to the vehicle speed, in S121, the value is switched between two values for high-speed driving and low-speed driving.
  • the threshold value THa and the threshold time Wa may be switched to three or more values.
  • the threshold and the threshold time are changed in two stages depending on whether or not the vibration level is larger than the threshold. On the other hand, it may be changed in three steps or more according to the vibration level, or may be adjusted by setting the threshold and the threshold time steplessly according to the vibration level.
  • the settings of the thresholds THa and THb and the threshold times Wa and Wb may be changed according to the temperature.
  • the G sensor 54 is used as a vibration sensor for detecting the vibration of the vehicle body.
  • a stroke sensor for detecting the displacement of the vehicle body relative to the road surface or wheels is mounted on the vehicle V, and the acceleration is calculated by differentiating the detection value of the stroke sensor with respect to time, whereby the stroke sensor is used as a vibration sensor. It can also be used.
  • the operation state (unstable operation state) is such that the fingertip F is less likely to be positioned at the intended position due to the traveling vibration of the vehicle V using vehicle speed information and vibration information.
  • the vehicle V is traveling on a rough road based on the current position information of the vehicle V included in the navigation device or road information acquired by communication from an external communication device, and the result of the determination Whether or not an unstable operation situation is present may be determined.

Landscapes

  • Position Input By Displaying (AREA)

Abstract

L'invention porte sur un dispositif à actionnement capacitif, lequel dispositif comporte : une plaque d'actionnement (10) qui constitue des faces d'actionnement (11, 12, 13, 14, 15, 16) destinées à être actionnées par toucher par un corps d'actionnement (F) ; une unité de détermination de toucher (46) qui détermine qu'une opération de toucher, dans laquelle le corps d'actionnement vient en contact avec les faces d'actionnement, ou une opération de séparation, dans laquelle le corps d'actionnement en contact avec les faces d'actionnement se sépare des faces d'actionnement, a été effectuée ; des électrodes (21, 22, 23, 24, 25, 26) qui sont situées sur le côté opposé des faces d'actionnement par rapport au corps d'actionnement ; une unité de détection (41) qui obtient une valeur de détection correspondant à une variation de capacité qui se produit entre le corps d'actionnement et les électrodes ; et une unité de détermination de changement brutal (42) qui détermine si oui ou non, dans une période de changement (Tup, Tdw) pendant laquelle le taux de changement (V1, V2, V3, V4) de la valeur de détection est supérieur ou égal à un taux prédéterminé (Vth), un phénomène de changement brutal dans lequel la variation du taux de changement par temps unitaire devient supérieure ou égale à une variation prédéterminée (ΔVth) s'est produit. L'unité de détermination de toucher détermine que l'opération de toucher ou l'opération de séparation a été effectuée, à la condition que l'unité de détermination de changement brutal ait déterminé l'apparition du phénomène de changement brutal.
PCT/JP2014/006056 2014-01-08 2014-12-04 Dispositif à actionnement capacitif WO2015104752A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2014-002001 2014-01-08
JP2014001998 2014-01-08
JP2014002001A JP2015130122A (ja) 2014-01-08 2014-01-08 静電容量式操作装置
JP2014-001998 2014-01-31
JP2014172674A JP6331880B2 (ja) 2014-01-08 2014-08-27 静電容量式操作装置
JP2014-172674 2014-08-27

Publications (1)

Publication Number Publication Date
WO2015104752A1 true WO2015104752A1 (fr) 2015-07-16

Family

ID=53523611

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/006056 WO2015104752A1 (fr) 2014-01-08 2014-12-04 Dispositif à actionnement capacitif

Country Status (1)

Country Link
WO (1) WO2015104752A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016218543A (ja) * 2015-05-15 2016-12-22 株式会社東海理化電機製作所 検出装置
JP2016218544A (ja) * 2015-05-15 2016-12-22 株式会社東海理化電機製作所 検出装置
CN107817919A (zh) * 2017-10-26 2018-03-20 歌尔科技有限公司 一种触摸动作的判定方法、装置和触摸传感器
WO2019064859A1 (fr) * 2017-09-29 2019-04-04 アルプスアルパイン株式会社 Dispositif d'entrée d'opération et poignée de porte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11136116A (ja) * 1997-10-29 1999-05-21 Matsushita Electric Works Ltd タッチスイッチ
JP2012103995A (ja) * 2010-11-12 2012-05-31 Nissan Motor Co Ltd タッチパネル装置およびタッチパネル装置の検出感度調整方法
JP2013117900A (ja) * 2011-12-05 2013-06-13 Toyota Motor Corp 車両用操作装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11136116A (ja) * 1997-10-29 1999-05-21 Matsushita Electric Works Ltd タッチスイッチ
JP2012103995A (ja) * 2010-11-12 2012-05-31 Nissan Motor Co Ltd タッチパネル装置およびタッチパネル装置の検出感度調整方法
JP2013117900A (ja) * 2011-12-05 2013-06-13 Toyota Motor Corp 車両用操作装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016218543A (ja) * 2015-05-15 2016-12-22 株式会社東海理化電機製作所 検出装置
JP2016218544A (ja) * 2015-05-15 2016-12-22 株式会社東海理化電機製作所 検出装置
WO2019064859A1 (fr) * 2017-09-29 2019-04-04 アルプスアルパイン株式会社 Dispositif d'entrée d'opération et poignée de porte
US11365571B2 (en) 2017-09-29 2022-06-21 Alps Alpine Co., Ltd. Operation input device and door handle
CN107817919A (zh) * 2017-10-26 2018-03-20 歌尔科技有限公司 一种触摸动作的判定方法、装置和触摸传感器

Similar Documents

Publication Publication Date Title
US9065447B2 (en) Proximity switch assembly and method having adaptive time delay
US8981602B2 (en) Proximity switch assembly having non-switch contact and method
US9136840B2 (en) Proximity switch assembly having dynamic tuned threshold
US9197206B2 (en) Proximity switch having differential contact surface
JP4987680B2 (ja) タッチセンサ装置及びタッチセンサ用のプログラム
US9660644B2 (en) Proximity switch assembly and activation method
US20160274664A1 (en) Proximity switch assembly having haptic feedback and method
US9559688B2 (en) Proximity switch assembly having pliable surface and depression
US9531379B2 (en) Proximity switch assembly having groove between adjacent proximity sensors
US8933708B2 (en) Proximity switch assembly and activation method with exploration mode
US9337832B2 (en) Proximity switch and method of adjusting sensitivity therefor
JP4419992B2 (ja) タッチパネル装置
US9143126B2 (en) Proximity switch having lockout control for controlling movable panel
US9520875B2 (en) Pliable proximity switch assembly and activation method
WO2015104752A1 (fr) Dispositif à actionnement capacitif
CN106662977B (zh) 用于在多手指操纵的情况下运行机动车的操纵装置的方法
US10331213B2 (en) Operator control device and method for actuating functional units and motor vehicle
US20150084896A1 (en) Touch switch module
JP6331880B2 (ja) 静電容量式操作装置
WO2021070585A1 (fr) Dispositif de commande
JP2015130122A (ja) 静電容量式操作装置
US11711078B2 (en) On/off detection device and vehicle interior component
CN105939153B (zh) 具有错误触摸自适应学习的接近开关和方法
RU2676921C2 (ru) Бесконтактный переключатель и способ его активации
US10461746B2 (en) Proximity switch assembly and method therefor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14878282

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14878282

Country of ref document: EP

Kind code of ref document: A1