WO2015011902A1 - 静電容量式センサを用いた検出方法と電子機器 - Google Patents
静電容量式センサを用いた検出方法と電子機器 Download PDFInfo
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- WO2015011902A1 WO2015011902A1 PCT/JP2014/003793 JP2014003793W WO2015011902A1 WO 2015011902 A1 WO2015011902 A1 WO 2015011902A1 JP 2014003793 W JP2014003793 W JP 2014003793W WO 2015011902 A1 WO2015011902 A1 WO 2015011902A1
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
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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
Definitions
- the present invention relates to a detection method using a capacitance type sensor mounted on various electronic devices and an electronic device including the capacitance type sensor.
- Such an electronic device includes a transparent capacitive sensor disposed on the front side of a display unit such as a liquid crystal display device.
- a display unit such as a liquid crystal display device.
- the user visually recognizes a predetermined icon or menu displayed on the display unit through the sensor and selects a desired icon or item. That is, various input operations are performed by touching a sensor portion corresponding to the desired icon or menu with a finger.
- the control unit detects the operated position, and activates the functional component assigned to the desired icon or menu.
- Such an electronic device can often detect an operation position by either an operation with a bare finger or an operation with a finger wearing a glove.
- a change in capacitance generated in the capacitance sensor is smaller than a touch operation with a bare finger. Therefore, for example, as described in Patent Document 1, in order to determine the touch operation of both, a reference value for the value of the change in capacitance due to the touch operation is set in advance.
- the value of the change in capacitance obtained by the touch operation is larger than the reference value, it is determined that the touch operation is performed with a bare finger.
- the value of the change in capacitance is smaller than the reference value, a glove is worn. It can be determined as a touch operation with a finger.
- Performing a basic scan that performs a bare-hand scan that determines whether or not the electrode of the capacitive sensor is operated by a bare hand and a glove scan that determines whether or not the electrode is operated by a hand wearing a glove Thus, it is determined whether the electrode is operated by a bare hand or a hand wearing a glove.
- This detection method can reduce false detection of the capacitance type sensor.
- FIG. 1A is a block diagram of an electronic device on which the capacitive sensor according to Embodiment 1 is mounted.
- FIG. 1B is a block diagram of the capacitive sensor according to Embodiment 1.
- FIG. 2 is a diagram illustrating a detection method using the capacitive sensor according to the first embodiment.
- FIG. 3 is a flowchart showing a detection method using the capacitive sensor according to the first embodiment.
- FIG. 4 is a diagram showing detection signals of the capacitive sensor according to the first embodiment.
- FIG. 5 is a diagram illustrating a detection signal of the capacitive sensor according to the first embodiment.
- FIG. 6 is a diagram illustrating a detection signal of the capacitive sensor according to the first embodiment.
- FIG. 1A is a block diagram of an electronic device on which the capacitive sensor according to Embodiment 1 is mounted.
- FIG. 1B is a block diagram of the capacitive sensor according to Embodiment 1.
- FIG. 2 is a diagram illustrating
- FIG. 7 is a schematic diagram of electrodes of the capacitive sensor according to the second embodiment.
- FIG. 8 is a diagram showing detection signals of the capacitive sensor according to the second embodiment.
- FIG. 9 is a diagram showing detection signals of the capacitive sensor according to the second embodiment.
- FIG. 10 is a diagram illustrating a detection signal of the capacitive sensor according to the second embodiment.
- FIG. 11 is a diagram illustrating detection signals of the capacitive sensor according to the second embodiment.
- FIG. 1A is a block diagram of an electronic device 1 in which the capacitive sensor 5 according to Embodiment 1 is mounted.
- the electronic device 1 includes a display unit 10 including a liquid crystal display device, a capacitance sensor 5 disposed on the front surface of the display unit 10, a microcomputer connected to the capacitance sensor 5 and the display unit 10, and the like.
- a functional configuration unit 20 (20A, 20B,..., 20N) controlled by the control unit 15.
- the control unit 15 controls the capacitive sensor 5 and the display unit 10.
- FIG. 1B is a block diagram of the capacitive sensor 5.
- the capacitive sensor 5 includes an electrode 5A, a detection unit 5B connected to the electrode 5A, and an insulating cover 5C that covers the electrode 5A.
- the user touches the cover 5C with the bare hand 91 or the hand 93 wearing the glove 92, thereby touching the capacitive sensor 5 on the electrode 5A.
- the detection unit 5B outputs a detection signal corresponding to the capacitance of the electrode 5A to the control unit 15.
- the control unit 15 displays an index such as an icon or a menu on the display unit 10, and the user visually recognizes the index via the capacitive sensor 5 and responds to the index.
- the touch operation of touching the location of the electrostatic capacitance sensor 5 with a finger is performed.
- a touch operation is performed, a change in capacitance occurs at a location touched by the capacitive sensor 5.
- the control part 15 detects the location touched based on the change of electrostatic capacitance, and operates the functional component part 20 allocated to the index.
- the capacitance type sensor 5 in the first embodiment, even if the capacitance type sensor 5 is operated with the bare hand 91 in the touch operation, the capacitance is set with the hand 93 wearing the glove 92. Even if the sensor 5 is operated, the controller 15 can detect that the capacitance sensor 5 has been operated satisfactorily with few false detections. Below, operation
- FIG. 2 shows a detection method using the capacitance type sensor 5 of the electronic apparatus 1 in the first embodiment.
- FIG. 3 is a flowchart showing a detection method using the capacitive sensor 5.
- the controller 15 performs a basic scan using the capacitive sensor 5 and determines whether or not the capacitive sensor 5 has been operated. In the basic scan, the control unit 15 performs a bare-hand scan for determining whether or not the electrode 5A is operated by the bare hand 91, and then the control unit 15 changes the parameter of the detection unit 5B of the capacitive sensor 5.
- the sensitivity of the detection unit 5B is increased, and a glove scan for determining whether or not the electrode 5A is operated by the hand 93 wearing the glove 92 is performed following the bare hand scan (step S101).
- the control unit 15 updates the parameters of the detection unit 5B in a period Td between the glove scan and the bare hand scan in the basic scan.
- the control unit 15 updates the parameters of the detection unit 5B or performs arithmetic processing during the period Tc between the basic scan and the individual scan.
- the control unit 15 repeatedly performs basic scanning when the user is not operating the capacitive sensor 5.
- One basic scan takes about several hundreds of microseconds including arithmetic processing.
- the order of the bare hand scan and the glove scan in the basic scan is not particularly limited, but the scan that is presumed to have a high priority for the operation of the capacitive sensor 5 among the bare hand scan and the glove scan is first performed. Preferably it is done.
- the parameters include frequency, input / output time, input / output count, and the like.
- the control unit 15 performs a basic scan in step S101, and determines whether or not the electrode 5A of the capacitive sensor 5 is operated (step S102).
- the control unit 15 uses either the bare hand 91 or the hand 93 wearing the glove 92 to form the electrode 5A. Is determined, and the result of the determination is stored as a first determination result (step S103).
- the bare hand scan and the glove scan are performed individually in time series, so that it is appropriate for either the bare hand 91 or the hand 93 wearing the glove 92. The operation can be detected at various levels.
- 4 and 5 show detection signals output from the detection unit 5B in the bare hand scan and the glove scan, respectively. 4 and 5, the vertical axis indicates the level of the detection signal, and the horizontal axis indicates time.
- the control unit 15 detects and calculates the capacitance of the electrode 5A, and sets the level of the detection signal obtained as a result of the calculation to a predetermined threshold value D11 and a predetermined value greater than the threshold value D11. This is compared with the threshold value D12. The control unit 15 determines that the electrode 5A of the capacitive sensor 5 is operated with the bare hand 91 when the level of the detection signal is greater than the threshold value D12. On the other hand, the control unit 15 determines that the electrode 5A of the capacitive sensor 5 is not operated with the bare hand 91 when the level of the detection signal is equal to or less than the threshold value D12.
- the control unit 15 detects and calculates the capacitance of the electrode 5A, and sets the level of the detection signal as a result of the calculation to a predetermined threshold value D21 and a predetermined threshold value D21 that is greater than the threshold value D21. Contrast with threshold D22.
- the control unit 15 determines that the electrode 5A is being operated with the hand 93 wearing the glove 92.
- the control unit 15 determines that the electrode 5A is not operated with the hand 93 wearing the globe 92.
- the threshold value D22 is much smaller than the threshold value D11 in the bare-hand scan shown in FIG.
- the control unit 15 refers to the hovering state in which the bare hand 91 is separated from the capacitive sensor 5 by a slight distance from the state in which the electrode 5A is operated with the hand 93 wearing the glove 92. A distinct hovering determination is performed. The hovering determination will be described in detail later.
- control unit 15 performs the operation at an appropriate level during the operation with the bare hand 91 and the operation with the hand 93 wearing the glove 92 by the continuous bare hand scan and the glove scan. It can be detected.
- step S102 If it is determined in step S102 that the control unit 15 is not operating the electrode 5A (“No” in step S102), the control unit 15 performs a basic scan in step S101.
- control unit 15 After storing the determination result as the first determination result in step S103, the control unit 15 performs a basic scan in the same manner as in step S101 (step S104).
- step S104 The basic scan is performed in step S104, and similarly to step S102, the control unit 15 determines whether or not the electrode 5A of the capacitive sensor 5 is operated (step S105).
- the control unit 15 determines that the electrode 5A is being operated in step S105 (“Yes” in step S105)
- the control unit 15 uses either the bare hand 91 or the hand 93 wearing the glove 92 to form the electrode 5A. Is stored, and the result of the determination is stored as the second determination result together with the operation position that is the position of the electrode 5A (step S106).
- step S105 If it is determined in step S105 that the control unit 15 is not operating the electrode 5A (“No” in step S105), the control unit 15 performs a basic scan in step S101.
- control unit 15 determines whether or not the first determination result and the second determination result match (step S107).
- Step S109 the control unit 15 uses the bare hand 91 to perform the electrode 5A of the capacitive sensor 5. Is finally determined to determine the final determination result (step S110).
- the control unit 15 performs the bare hand individual scan that is an individual scan in which the threshold value for detecting the touch operation with the bare hand 91 is set to the threshold value D13 that is larger than the threshold value D12 (step S113). . It is determined whether or not the user has touched the capacitive sensor 5 with the bare hand 91 during the individual hand scan in step S113 (step S114). When the user touches the capacitive sensor 5 with the bare hand 91, the level of the detection signal exceeds the threshold value D13, and the control unit 15 determines that the touch operation is being performed ("Yes" in step S114). . The control unit 15 employs an operation position at which a touch operation is detected as the operation position.
- step S114 determines in step S114 that a touch operation with a bare hand is being performed (“Yes” in step S114), the control unit 15 performs a bare hand individual scan in step S113.
- the operation of the capacitive sensor 5 is finally determined by matching the determination result of the first determination result and the second determination result twice in succession.
- the operation of the capacitive sensor 5 may be finally determined by matching the determination results continuously for a plurality of times.
- the control unit 15 determines that the touch operation with the bare hand 91 is not performed (“No” in step S114). It is determined that the touch operation at 91 has ended, and the control unit 15 performs a basic scan in step S101.
- step S109 when the capacitive sensor 5 is not operated with the bare hand 91 in step S109 (“No” in step S109), that is, the glove 92 is worn in both the first determination result and the second determination result.
- the control unit 15 performs the above-described hovering determination (step S111). Even when the bare hand 91 is not operated with the bare hand 91 and the bare hand 91 is located very close to the capacitive sensor 5, the control unit 15 is charged with the hand 93 wearing the globe 92 by the glove scan. It may be erroneously determined that the capacitive sensor 5 has been operated.
- the control unit 15 performs the hovering determination to determine whether or not the capacitive sensor 5 has been operated with both the first determination result and the second determination result with the hand 93 wearing the glove 92. (Step S112), and the above erroneous determination can be prevented.
- FIG. 6 shows the level of the detection signal in the hovering determination of the capacitive sensor 5 in the first embodiment.
- the vertical axis indicates the level of the detection signal
- the horizontal axis indicates time. Since the control unit 15 increases the sensitivity of the detection unit 5B in the glove scan, the level of the detection signal shown in FIG. 5 is larger than the threshold value D22 even in a hovering state where the capacitive sensor 5 is not touched with the bare hand 91.
- the value may be within a range smaller than the threshold value D23.
- the position of the bare hand 91 with respect to the electrode 5A of the capacitive sensor 5 varies more greatly than the state in which the capacitive sensor 5 is operated by the hand 93 wearing the glove 92, as shown in FIG.
- the difference P1 between the level of the detection signal in the glove scan in the first determination result and the level of the detection signal in the glove scan in the second determination result increases.
- the difference P1 is compared with a predetermined value as the hovering determination.
- the control unit 15 determines that the capacitive sensor 5 is operated with the hand 93 wearing the glove 92 in both the first determination result and the second determination result. ("Yes" in step S112).
- the control is performed even if both the first determination result and the second determination result coincide with the operation of the capacitive sensor 5 with the hand 93 wearing the glove 92.
- the unit 15 determines that the capacitive sensor 5 is not operated with the hand 93 wearing the globe 92.
- the control unit 15 sets the difference between the maximum value and the minimum value of the detection signal in the determination results as the difference P1. It is preferable to contrast with a predetermined value.
- step S112 When it is determined in step S112 that the capacitive sensor 5 is operated with the hand 93 wearing the glove 92 (“Yes” in step S112), the control unit 15 uses the hand 93 wearing the glove 92 to Finally, it is determined that the capacitive sensor 5 has been operated, and the final determination result is determined (step S110).
- step S110 the control unit 15 performs a glove individual scan that is an individual scan at the threshold D24 for detecting a touch operation with the hand 93 wearing the glove 92 (step S113).
- the threshold value D24 is larger than the threshold value D23. It is determined whether or not the user has touched the capacitive sensor 5 with the hand 93 wearing the glove 92 during the glove individual scan in step S113 (step S114).
- step S114 When the user touches the capacitive sensor 5 with the hand 93 wearing the glove 92, the level of the detection signal exceeds the threshold value D24, and the control unit 15 determines that the touch operation is being performed (step S114). Yes).
- the control unit 15 employs an operation position at which a touch operation is detected as the operation position.
- the control unit 15 determines that the touch operation with the hand 93 wearing the glove 92 is not performed (step S114). No)), it is determined that the touch operation has been completed, and the control unit 15 performs a basic scan in step S101.
- step S112 When it is determined in step S112 that the capacitive sensor 5 is not operated with the hand 93 wearing the glove 92 ("No" in step S112), the bare hand 91 is in the hovering state and the capacitive sensor 5 Is determined not to be operated, the control unit 15 performs a basic scan in step S101, and obtains a first determination result through steps S102 and S103.
- step S107 the control unit 15 sets the second determination result as the first determination result.
- Step S08 a basic scan is performed in step S104, a second determination result is newly obtained through steps S105 and S106, and in step S107, the control unit 15 determines that the second determination result is the first determination result. It is determined whether or not the result matches the determination result.
- the control unit 15 does not necessarily execute steps S109, S111, and S112 shown in FIG. In this case, when the first and second determination results match in step S107 (“Yes” in step S107), the control unit 15 uses the bare hand 91 to electrode the capacitive sensor 5 in step S110. It is finally determined whether 5A is operated or the electrode 5A is operated with the hand 93 wearing the glove 92, and the final determination result is determined.
- the capacitive sensor 5 is moved by the basic scan that continuously performs the bare hand scan and the glove scan. It is determined as a final determination result whether to operate either the bare hand 91 or the hand 93 wearing the glove 92.
- the control unit 15 determines the presence or absence of the touch operation using the threshold value D13 for detecting the touch operation with the bare hand 91. Individual scan (individual scan for bare hands).
- the control unit 15 detects the touch operation with the hand 93 wearing the globe 92.
- An individual scan (individual scan for glove) in step S113 for determining the presence or absence of a touch operation is performed using.
- the control unit 15 detects the touch operation of the user and activates the functional configuration unit 20 corresponding to the position of the electrode 5 ⁇ / b> A of the capacitive sensor 5.
- both the touch operation with the bare hand 91 and the touch operation with the hand 93 wearing the glove 92 can be detected with appropriate sensitivity in the basic scan, and therefore the capacitance type with high accuracy with few false detections.
- An operation on the sensor 5 can be determined. Further, since the final determination result is obtained by continuously matching the first determination result and the second determination result obtained through a plurality of basic scans, it is possible to reduce erroneous detection of the operation on the capacitive sensor 5. Can do.
- the control unit 15 After the final determination result is confirmed, the control unit 15 repeatedly performs an individual scan, which is only a scan based on the operation obtained from the final determination result, on the capacitive sensor 5 as shown in FIG.
- the control unit 15 When the control unit 15 finally determines that the capacitive sensor 5 is operated with the bare hand 91 in step S110 illustrated in FIG. 3 and finalizes the final determination result, the control unit 15 then touches the bare hand 91.
- the individual scan (individual hand individual scan) in step S113 for detecting the operation is repeated.
- the control unit 15 when the control unit 15 finally determines that the capacitive sensor 5 is operated by the hand 93 wearing the glove 92 in Step S110 shown in FIG.
- step S113 for detecting the touch operation of the hand 93 wearing the glove 92 is repeated.
- the control unit 15 repeatedly performs the individual scan until the touch operation is released. By this operation, the control unit 15 can continue to detect the operation efficiently in a short time and with high accuracy, thereby reducing erroneous detection.
- control unit 15 When the touch operation is released while the control unit 15 repeatedly performs the individual scan, the control unit 15 detects the release of the touch operation through the individual scan, and stops the activated function component unit 20, as shown in FIG. A basic scan is performed in step S101 shown.
- the electronic device 1 includes the functional configuration unit 20 (20A, 20B,..., 20N) as a device operated by a touch operation, and these devices are controlled by the control unit 15. Another device may be used.
- the capacitance type sensor 5 may be arranged separately from the display unit 10.
- the globe 92 is thick and has an insulating property.
- the control unit 15 uses the bare hand 91 to operate the capacitive sensor 5 even when the capacitive sensor 5 is operated with the hand 93 wearing the globe 92. As a result, the operation of the capacitive sensor 5 can be determined stably and with high accuracy.
- the control unit 15 determines whether or not the electrode 5A of the capacitive sensor 5 is operated by the bare hand 91 and whether or not the electrode 5A is operated by the hand 93 wearing the glove 92.
- a glove scan for determining whether or not the electrode 5A is operated
- a first basic scan for determining which of the bare hand 91 and the hand 93 wearing the glove 92 is operated is performed.
- the control unit 15 may perform an individual scan for bare hands that determines whether or not the electrode 5A is operated by the bare hand 91. . In addition, the control unit 15 performs the first basic scan and determines whether or not the electrode 5A is operated with the hand 93 wearing the glove 92 and then whether or not the electrode 5A is operated with the hand 93 wearing the glove 92. A glove individual scan may be performed.
- the control unit 15 determines whether the electrode 5A is operated by the bare hand 91 or the hand 93 wearing the globe 92 by performing the bare hand scan and the glove scan following the first basic scan. Two basic scans may be performed at least once. In this case, when the control unit 15 determines that the electrode 5A is operated with the bare hand 91 in all of the first basic scan and at least one second basic scan, the electrode 5A is operated with the bare hand 91. It is finally determined that The control unit 15 wears the glove 92 when it is determined that the electrode 5A is operated by the hand 93 wearing the glove 92 in all of the first basic scan and at least one second basic scan. It is finally determined that the electrode 5A has been operated with the hand 93.
- the controller 15 determines that the electrode 5A is operated with the hand 93 wearing the globe 92 in the first basic scan and at least one second basic scan, the electrode 5A of the capacitive sensor 5 is used. A plurality of detection signals corresponding to the electrostatic capacity of is obtained. The control unit 15 finally determines that the electrode 5A is operated with the hand 93 wearing the glove 92 when the difference between the maximum value and the minimum value of the levels of the plurality of detection signals is smaller than a predetermined value. In addition, when the difference between the maximum value and the minimum value of the plurality of detection signal levels is equal to or greater than a predetermined value, the control unit 15 finally determines that the electrode 5A is not operated with the hand 93 wearing the globe 92. Judgment.
- the control unit 15 may perform individual scanning for bare hands to determine whether or not the electrode 5A is operated by the bare hand 91 after finally determining that the electrode 5A is operated by the bare hand 91. Further, the control unit 15 finally determines that the electrode 5A is operated with the hand 93 wearing the globe 92, and then determines whether the electrode 5A is operated with the hand 93 wearing the globe 92. Individual scans may be performed.
- the capacitance type sensor 5 can detect a position operated by the control unit 15 based on a change in capacitance caused by a finger or the like approaching or touching. If it is a thing, a shape, a detailed structure, etc. will not be limited, For example, a capacitive touch panel may be sufficient.
- the electronic device 1 on which it is mounted may be a mobile communication device such as a smartphone or an information communication terminal, an electronic device for home appliances, a vehicle-mounted device such as an automobile, or a steering switch.
- the capacitive sensor 5 and the control unit 15 according to the first embodiment can be applied to an electronic component configured to perform a predetermined operation by a touch operation.
- FIG. 7 is a schematic diagram of the electrodes 41, 42, and 43 of the capacitive sensor 35 according to the second embodiment.
- the capacitive sensor 5 in Embodiment 1 shown in FIG. 1B has one electrode 5A, but the capacitive sensor 35 has three electrodes 41 to 43 arranged in a line independently of each other.
- the capacitive sensor 35 is connected to the controller 15 in the same manner as the capacitive sensor 5 in the first embodiment shown in FIG. 1A.
- the capacitive sensor 5 is touch-operated.
- the capacitive sensor may have a plurality of electrodes.
- the input operation to the capacitive sensor 35 is not only a touch operation, but the upper surface of the capacitive sensor 35 is touched by a finger or the like.
- tracing it is possible to detect a so-called gesture operation such as a slide operation or a flick operation that continuously operates the plurality of electrodes 41 to 43.
- the electronic device 1 including the capacitive sensor 35 according to the second embodiment can reduce the erroneous detection of the gesture operation even in the gesture operation based on the idea of the invention.
- the control unit 15 independently performs basic scanning on the electrodes 41 to 43 of the capacitive sensor 35 and performs step S110 shown in FIG. Confirm the final judgment result with.
- the control unit 15 sequentially performs bare-hand scans on the electrodes 41, 42, and 43, and then sequentially performs glove scans on the electrodes 41, 42, and 43. That is, the control unit 15 does not perform basic scanning on the electrodes 41 to 43 simultaneously.
- the individual scan in the operation obtained from the final determination result is performed on the electrodes 41 to 41. Performed in all 43. For example, if it is determined that the electrode 41 of the electrodes 41 to 43 has been operated with the bare hand 91 as the final determination result earliest in step S110, the controller 15 causes the electrodes 42, 43 to be used after the final determination result is determined. The individual scan of the operation of the bare hand 91 is started without performing the basic scan with the other electrodes 42 and 43 even if the final determination result of each is not confirmed. Thereby, erroneous detection can be reduced even in a gesture operation in which the electrodes 41 to 43 of the capacitive sensor 35 are continuously operated.
- the control unit 15 detects a touch operation by the bare hand 91 by performing an individual scan (bare hand individual scan) with the threshold value D13.
- the control unit 15 performs an individual scan (individual scan for the globe) with the threshold value D24. A touch operation with the worn hand 93 is detected.
- 8 and 9 show the level of the detection signal when the electrodes 41 to 43 of the capacitive sensor 35 are continuously operated in the order of the electrodes 41, 42, 43 with the bare hand 91. 8 and 9, the vertical axis indicates the level of the detection signal, and the horizontal axis indicates time. By operating the capacitive sensor 35 with the electrodes 41 to 43, the capacitive sensor 35 outputs detection signals S41 to S43, respectively.
- control unit 15 repeatedly performs each basic scan with the electrodes 41 to 43 until the capacitive sensor 35 is operated with the bare hand 91.
- the control unit 15 determines the final determination result that the operation of the electrode 41 is an operation with the bare hand 91, and thereafter repeatedly performs individual scanning (individual scanning for bare hands) with a threshold value D14 larger than the threshold value D12.
- the threshold value D14 for detecting a gesture operation is smaller than the threshold value D13 for detecting a touch operation.
- the threshold value D14 may be the same as the threshold value D13.
- the final determination result of the electrode 41 is determined at time t1. Since the level of the detection signal S42 of the electrode 42 is smaller than the threshold value D11 at the time point t1, the final determination result at the electrode 42 is not fixed. However, the control unit 15 repeatedly performs the individual scan (individual hand individual scan) at the threshold value D14 for detecting the gesture operation of the electrode 42 from the time point t1. Similarly, since the level of the detection signal S43 at the time point t1 is smaller than the threshold value D11, the final determination result at the electrode 43 is not fixed. However, the control unit 15 repeatedly performs the individual scan (individual hand individual scan) at the threshold value D14 for detecting the gesture operation of the electrode 43 from the time point t1.
- the control unit 15 When the level of the detection signals S42 and S43 due to the operation at the electrodes 42 and 43 exceeds the threshold D14 for detecting the presence or absence of the gesture operation within a predetermined period Tf from the time t1, the control unit 15 causes the electrodes 41 to 43 to It is determined that a gesture operation has been performed.
- the control unit 15 operates the function configuration unit 20 based on the gesture operation, or performs operations such as scrolling and enlarging / reducing the screen displayed on the display unit 10. Note that the detection signal S41 due to the operation at the electrode 41 may exceed the threshold value D14.
- the control unit 15 determines that the user does not perform the gesture operation on the electrodes 41 to 43.
- the predetermined period Tf is 300 msec, but is not limited to this and can be determined as appropriate.
- 10 and 11 show detection signal levels when the electrodes 41 to 43 of the capacitive sensor 35 are successively operated in the order of the electrodes 41, 42, and 43 with the hand 93 wearing the glove 92.
- the vertical axis indicates the level of the detection signal
- the horizontal axis indicates time.
- control unit 15 repeatedly performs each basic scan of the electrodes 41 to 43 until the capacitive sensor 35 is operated with the hand 93 wearing the globe 92.
- the control unit 15 determines that the operation of the electrode 41 is an operation with the hand 93 wearing the glove 92 as a final determination result, and thereafter, the individual scan with the threshold D25 larger than the threshold D22 (the individual scan for glove) ) Repeatedly.
- the threshold value D25 for detecting a gesture operation is smaller than the threshold value D24 for detecting a touch operation.
- the threshold value D25 may be the same as the threshold value D24.
- the final determination result of the electrode 41 is determined at the time point t1. Since the level of the detection signal S42 of the electrode 42 is smaller than the threshold value D21 at the time t1, the final determination result at the electrode 42 is not fixed. However, the control unit 15 repeatedly performs the individual scan (glove individual scan) at the threshold value D25 for detecting the presence or absence of the gesture operation of the electrode 42 from the time point t1. Similarly, since the level of the detection signal S43 of the electrode 43 is smaller than the threshold value D21 at the time point t1, the final determination result at the electrode 43 is not fixed. However, the control unit 15 repeatedly performs the individual scan (glove individual scan) at the threshold D25 for detecting the presence or absence of the gesture operation from the time point t1.
- the control unit 15 When the level of the detection signals S42 and S43 due to the operation at the electrodes 42 and 43 exceeds the threshold D25 for detecting the presence or absence of the gesture operation within a predetermined period Tf from the time t1, the control unit 15 causes the electrodes 41 to 43 to It is determined that a gesture operation has been performed.
- the control unit 15 operates the function configuration unit 20 based on the gesture operation, or performs operations such as scrolling and enlarging / reducing the screen of the display unit 10. Note that the level of the detection signal S41 due to the operation on the electrode 41 may exceed the threshold D25.
- the control unit 15 determines that the user is not performing a gesture operation on the electrodes 41-43.
- the control unit 15 determines that the electrode 42 is operated by the hand 93 wearing the globe 92 within a predetermined period Tf from the time t1 when it is finally determined that the electrode 41 is operated by the hand 93 wearing the globe 92. In this case, it is determined that a gesture operation has been performed on at least the electrodes 41 and 42.
- the capacitive sensor 35 in the second embodiment has three electrodes 41 to 43 arranged in a line, but the arrangement position and number of electrodes are not limited to this.
- the detection method using the capacitive sensor in the present invention can reduce false detection and is useful for various electronic devices.
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Abstract
Description
図1Aは実施の形態1における静電容量式センサ5を搭載した電子機器1のブロック図である。電子機器1は、液晶表示装置などからなる表示部10と、表示部10の前面に配置された静電容量式センサ5と、静電容量式センサ5および表示部10に接続されたマイクロコンピュータなどからなる制御部15と、制御部15によって制御される機能構成部20(20A、20B、・・・、20N)を備える。制御部15は静電容量式センサ5および表示部10を制御する。
図7は実施の形態2における静電容量式センサ35の電極41、42,43の模式図である。図1Bに示す実施の形態1における静電容量式センサ5は1つの電極5Aを有するが、静電容量式センサ35は互いに独立して一列に並べて配された3つの電極41~43を有する。静電容量式センサ35は図1Aに示す実施の形態1における静電容量式センサ5と同様に制御部15に接続されている。
5 静電容量式センサ
5A 電極(第1の電極)
15 制御部
35 静電容量式センサ
41 電極(第1の電極)
42 電極(第2の電極)
Claims (10)
- 第1の電極を有する静電容量式センサを準備するステップと、
素手により前記静電容量式センサの前記第1の電極が操作されたか否かを判定する素手用スキャンと、グローブを着用した手により前記第1の電極が操作されたか否かを判定するグローブ用スキャンとを行うことにより、前記第1の電極が前記素手と前記グローブを着用した前記手とのいずれにより操作されたかを判定する第1の基本スキャンを行うステップと、
を含む、静電容量式センサを用いた検出方法。 - 前記第1の基本スキャンを行うステップにおいて前記素手により前記第1の電極が操作されたと判定した後で、前記素手により前記第1の電極が操作されたか否かを判定する素手用個別スキャンを行うステップと、
前記第1の基本スキャンを行うステップにおいて前記グローブを着用した前記手で前記第1の電極が操作されたと判定した後で、前記グローブを着用した前記手で前記第1の電極が操作されたか否かを判定するグローブ用個別スキャンを行うステップと、
をさらに含む、請求項1に記載の静電容量式センサを用いた検出方法。 - 前記第1の基本スキャンを行うステップに引き続いて、前記素手用スキャンと前記グローブ用スキャンとを行うことにより前記第1の電極が前記素手と前記グローブを着用した前記手とのいずれにより操作されたかを判定する第2の基本スキャンを少なくとも1回行うステップと、
前記第1の基本スキャンを行うステップと前記第2の基本スキャンを少なくとも1回行うステップとの全てにおいて前記素手で前記第1の電極が操作されたと判定した場合に、前記素手で前記第1の電極が操作されたと最終的に判定するステップと、
前記第1の基本スキャンを行うステップと前記第2の基本スキャンを少なくとも1回行うステップとの全てにおいて前記グローブを着用した前記手で前記第1の電極が操作されたと判定した場合に、前記グローブを着用した前記手で前記第1の電極が操作されたと最終的に判定するステップと、
をさらに含む、請求項1に記載の静電容量式センサを用いた検出方法。 - 前記第1の基本スキャンを行うステップと前記第2の基本スキャンを少なくとも1回行うステップとにおいて前記グローブを着用した前記手で前記第1の電極が操作されたと判定した場合に、前記静電容量式センサの前記第1の電極の静電容量に応じた複数の検出信号を得るステップをさらに含み、
前記グローブを着用した前記手で前記第1の電極が操作されたと最終的に判定するステップは、
前記複数の検出信号のレベルの最大値と最小値との差が所定の値より小さい場合に、前記グローブを着用した前記手で前記第1の電極が操作されたと最終的に判定するステップと、
前記複数の検出信号の前記レベルの前記最大値と前記最小値との前記差が前記所定の値以上である場合に、前記グローブを着用した前記手で前記第1の電極が操作されていないと最終的に判定するステップと、
を含む、請求項3に記載の静電容量式センサを用いた検出方法。 - 前記素手で前記第1の電極が操作されたと最終的に判定するステップの後で、前記素手により前記第1の電極が操作されたか否かを判定する素手用個別スキャンを行うステップと、
前記グローブを着用した前記手で前記第1の電極が操作されたと最終的に判定するステップの後で、前記グローブを着用した前記手で前記第1の電極が操作されたか否かを判定するグローブ用個別スキャンを行うステップと、
をさらに含む、請求項3または4に記載の静電容量式センサを用いた検出方法。 - 前記静電容量式センサは第2の電極をさらに有し、
前記素手で前記第1の電極を操作したと最終的に判定するステップにおいて前記素手で前記第1の電極を操作したと最終的に判定した時点から所定の期間内に前記素手により前記第2の電極が操作されたと判定した場合に、前記第1の電極と前記第2の電極にジェスチャ操作が行われたと判定するステップをさらに含む、請求項3に記載の静電容量式センサを用いた検出方法。 - 前記静電容量式センサは第2の電極をさらに有し、
前記グローブを着用した前記手で前記第1の電極を操作したと最終的に判定するステップにおいて前記グローブを着用した前記手で前記第1の電極を操作したと最終的に判定した時点から所定の期間内に前記グローブを着用した前記手により前記第2の電極が操作されたと判定した場合に、前記第1の電極と前記第2の電極にジェスチャ操作が行われたと判定するステップをさらに含む、請求項3に記載の静電容量式センサを用いた検出方法。 - 前記静電容量式センサは第2の電極をさらに有し、
前記第1の基本スキャンを行うステップにおいて前記素手で前記第1の電極を操作したと判定した時点から所定の期間内に前記素手により前記第2の電極が操作されたと判定した場合に、前記第1の電極と前記第2の電極にジェスチャ操作が行われたと判定するステップをさらに含む、請求項1に記載の静電容量式センサを用いた検出方法。 - 前記静電容量式センサは第2の電極をさらに有し、
前記第1の基本スキャンを行うステップにおいて前記グローブを着用した前記手で前記第1の電極を操作したと判定した時点から所定の期間内に前記グローブを着用した前記手により前記第2の電極が操作されたと判定した場合に、前記第1の電極と前記第2の電極にジェスチャ操作が行われたと判定するステップをさらに含む、請求項1に記載の静電容量式センサを用いた検出方法。 - 電極を有する静電容量式センサと、
前記静電容量式センサに接続された制御部と、
を備え、
前記制御部は、素手により前記静電容量式センサの前記電極が操作されたか否かを判定する素手用スキャンと、グローブを着用した手により前記電極が操作されたか否かを判定するグローブ用スキャンとを行うことにより前記第1の電極が前記素手と前記グローブを着用した前記手とのいずれにより操作されたかを判定する基本スキャンを行う、電子機器。
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