WO2013014942A1 - Electronic device - Google Patents
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- WO2013014942A1 WO2013014942A1 PCT/JP2012/004798 JP2012004798W WO2013014942A1 WO 2013014942 A1 WO2013014942 A1 WO 2013014942A1 JP 2012004798 W JP2012004798 W JP 2012004798W WO 2013014942 A1 WO2013014942 A1 WO 2013014942A1
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- piezoelectric element
- touch panel
- pressing
- pressure
- control unit
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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
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
Definitions
- the present invention relates to an electronic device using a piezoelectric element.
- an electronic device having a contact detection unit such as a touch panel is increasing as a member for detecting an operation by an operator.
- electronic devices having a contact detection unit such as devices such as calculators and ticket machines, household appliances such as microwave ovens, televisions, and lighting devices, and industrial devices (FA devices) are widely used. .
- FIG. 7 is a diagram showing the voltage of the piezoelectric element detected by an electronic device having such a discharge function.
- a detection voltage A indicates a change in voltage of the piezoelectric element detected by the electronic device
- a press B indicates an actual press on the touch panel by the operating body.
- the detection of the voltage of the piezoelectric element is restarted from the reference voltage level after discharge (0 V in this figure).
- the detection voltage A is press releasing threshold voltage V 2 or less
- the electronic device is the tactile sensation to the operation member (time T 4 ⁇ T 5), is subsequently forcibly discharging the residual charge accumulated in the piezoelectric element (Times T 5 to T 6 ).
- FIG. 8 is a diagram illustrating a problem of the electronic device when the pressing operation is maintained.
- the detection voltage A indicates a change in the voltage of the piezoelectric element detected by the electronic device
- the press B indicates an actual press on the touch panel by the operating body.
- the electronic device When the detected voltage A exceeds the tactile sensation presentation threshold voltage V 1 (time T 1 ), the electronic device presents a tactile sensation to the operating body (time T 1 to T 2 ), forcing the residual charge accumulated in the piezoelectric element. Discharge (time T 2 to T 3 ). Thereafter, the pressing operation by the operator is maintained from time T 4 to T 5 . If the operator performs a push two stages, as shown in FIG. 8, further pressing B increases from time T 5.
- the electric charge generated at times T 3 to T 4 accumulates in the piezoelectric element, but when the operator maintains the pressing operation and the pressing B becomes substantially constant, the electric charge accumulated in the piezoelectric element during that time is directed toward the zero point.
- the detection voltage A gradually approaches 0V (time T 4 to T 5 ).
- the conventional electronic device has a problem in that the voltage detected by the piezoelectric element fluctuates due to spontaneous discharge of the electric charge accumulated in the piezoelectric element, and the pressure cannot be accurately detected.
- an object of the present invention made in view of such circumstances is to prevent the press on the touch panel by the operator's operating body from deviating from the output of the piezoelectric element that should correspond to the press, and to accurately press the touch on the touch panel. It is an object of the present invention to provide an electronic device that can be detected.
- an electronic device detects a voltage generated by a touch panel, a piezoelectric element that generates a voltage based on pressing on the touch panel, and a voltage generated in the piezoelectric element, and based on the detected voltage, A control unit that drives the piezoelectric element to cause the operating body that presses the touch panel to have a tactile sensation and discharges the electric charge accumulated in the piezoelectric element, and the control unit changes the detected voltage
- the control unit changes the detected voltage
- control unit determines that the pressing operation is maintained when the detected change amount of the voltage does not exceed a predetermined amount over a predetermined time. It is characterized by that.
- control unit maintains the pressing operation when the number of times that the detected voltage becomes maximum or minimum exceeds a predetermined number of times within a predetermined time. It is determined that
- FIG. 1 is a block diagram showing a schematic configuration of an electronic device according to an embodiment of the present invention.
- the electronic device 1 includes a touch panel 10, a display unit 20, a piezoelectric element 30, a switching unit 40, and a control unit 50.
- the control unit 50 includes a pressing determination unit 51, a tactile sensation control unit 52, and a discharge control unit 53.
- the display unit 20 is configured using, for example, a liquid crystal display panel (LCD) or an organic EL display panel, and displays objects such as characters, images, and images.
- LCD liquid crystal display panel
- organic EL organic EL
- the touch panel 10 is normally disposed on the front surface of the display unit 20, and touches an object displayed on the display unit 20 with an operating body (for example, a finger or a stylus pen) or cancels the contact. Detect on (operation surface).
- the touch panel 10 may have a detection function of detecting a contact position with respect to the input surface, and the detection function can be realized by a known method such as a resistance film method or a capacitance method.
- the control unit 50 determines a process to be executed based on information input from the touch panel 10.
- the control unit 50 detects the voltage generated in the piezoelectric element 30 by the pressing determination unit 51, determines the pressing (pressing value) based on the detected voltage, and the determined pressing satisfies a predetermined standard
- a drive signal is applied to the piezoelectric element 30 by the tactile sensation control unit 52.
- the time when the pressure satisfies the predetermined reference may be a time when the pressure reaches the reference value by considering the predetermined reference as a reference value, or may be a time when the pressure exceeds the reference value. And it may be when a pressure equal to the reference value is detected.
- the press determination part 51 performs noise removal, A / D conversion, etc. with respect to the detected voltage.
- the press determination part 51 may handle a press with the unit of a voltage, and may convert it into the unit of Newton.
- the controller 50 forcibly discharges the electric charge remaining in the piezoelectric element 30 to the ground by the discharge controller 53. Further, the control unit 50 determines whether or not the pressing operation (pressing state) is maintained from the change in pressing determined by the pressing determination unit 51, and also determines that the pressing operation is maintained. Then, the electric charge remaining in the piezoelectric element 30 is forcibly discharged to the ground by the discharge control unit 53.
- the pressing operation pressing state
- the pressing operation is maintained, for example, after the operator presses the touch panel 10 with the operating body, and then does not weaken the pressing by the operating body or push in more strongly. This refers to maintaining the pressure for a predetermined time.
- the piezoelectric element 30 is mounted on the touch panel 10 so that the input surface of the touch panel 10 is bent (distorted) when pressed by the operating body.
- the piezoelectric element 30 has a function as a press detection unit that detects a press on the touch panel 10 and a function as a tactile sensation providing unit that presents a tactile sensation to the operating body that presses the touch panel 10.
- the piezoelectric element 30 generates a voltage based on a pressure on the input surface of the touch panel 10.
- the pressure on the touch panel 10 is obtained (determined) by the pressure determination unit 51 detecting a voltage generated in the piezoelectric element 30 based on the pressure.
- the piezoelectric element 30 generates vibration according to a predetermined vibration pattern in accordance with the drive signal applied by the tactile sensation control unit 52.
- a predetermined tactile sensation is presented to the operating body in contact with the input surface of the touch panel 10.
- the switching unit 40 switches between a function as a pressing detection unit of the piezoelectric element 30 and a function as a tactile sensation providing unit.
- FIG. 2 is a block diagram illustrating a schematic configuration of the switching unit 40 of the electronic device 1 according to an embodiment of the present invention, and illustrates a connection relationship between the pressing determination unit 51, the tactile sensation control unit 52, and the piezoelectric element 30. .
- the switching unit 40 includes changeover switches 41 and 42 and capacitors 43 and 44.
- the control unit 50 switches the changeover switch 41 and the changeover switch 42 to ON.
- the intermediate potential (for example, 20V) of the tactile sensation control unit 52 and the intermediate potential (for example, 1.3V) of the pressing determination unit 51 are different, the DC component is cut by the capacitor 43 and the capacitor 44, and only the AC component is obtained. Extract.
- the control unit 50 switches off the changeover switch 41 and the changeover switch 42 so that the drive signal applied to the piezoelectric element 30 is not input to the press determination unit 51. To control.
- the control unit 50 also switches the changeover switch 41 and the changeover switch 42 to OFF when the discharge control unit 53 discharges the residual charge accumulated in the piezoelectric element 30.
- FIG. 3 shows an example of the mounting structure of the electronic device 1 shown in FIG. 1, FIG. 3 (a) is a cross-sectional view of the main part, and FIG. 3 (b) is a plan view of the main part.
- the display unit 20 is housed and held in the housing 11.
- the touch panel 10 is held on the display unit 20 via an insulator 12 made of an elastic member.
- display unit 20 and touch panel 10 are rectangular in plan view.
- the touch panel 10 is held on the display unit 20 via the insulators 12 arranged at the four corners deviated from the display area A of the display unit 20 indicated by virtual lines in FIG.
- the casing 11 is provided with an upper cover 13 so as to cover the surface area of the touch panel 10 that is out of the display area of the display unit 20, and an insulator made of an elastic member is provided between the upper cover 13 and the touch panel 10. 14 is disposed.
- the surface member having the input surface 10 a is made of, for example, a transparent film or glass, and the back member is made of glass or acrylic.
- the touch panel 10 has a structure in which when the input surface 10a is pressed, the pressed portion is slightly bent (distorted) in response to the pressing, or the structure itself is bent slightly.
- the touch panel 10 detects pressure on the input surface 10a of the touch panel 10 in the vicinity of one side or a plurality of sides covered with the upper cover 13 on the back surface, in this case, near the three sides, and vibrates the touch panel 10 or the like. Then, the piezoelectric elements 30 for providing a tactile sensation to the operating body pressing the input surface 10a are respectively mounted.
- the casing 11, the upper cover 13, and the insulator 14 shown in FIG. 3A are not shown.
- FIG. 4 is a flowchart showing the operation of the electronic apparatus 1 according to this embodiment.
- This flowchart corresponds to a two-stage push. In this example, it is assumed that when the second step is pressed, the pressing operation (pressed state) is maintained for a predetermined time after the first step is pressed, and then the second step is further pressed.
- the electronic device 1 detects the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 and determines the pressing based on the detected voltage (step S101). Then, it is determined whether or not the pressure determined by the pressure determination unit 51 satisfies the first stage tactile sensation presentation criteria, that is, whether or not the pressure exceeds the first stage tactile sensation presentation threshold (step S102). If it is determined in step S102 that the pressure satisfies the first stage tactile sensation presentation criteria, the tactile sensation control unit 52 drives the piezoelectric element 30 to present tactile sensation, and then the discharge control unit 53 applies the tactile sensation to the piezoelectric element 30. The accumulated charge is forcibly discharged (step S103).
- step S103 the switching unit 40 turns off the connection between the piezoelectric element 30 and the pressing determination unit 51.
- step S102 if it is determined in step S102 that the pressure does not satisfy the first stage tactile sensation presentation criteria, the process returns to step S101.
- the switching unit 40 turns on the connection between the piezoelectric element 30 and the pressing determination unit 51, and restarts the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 (step S104). .
- the control unit 50 determines whether or not the pressure determined by the pressure determination unit 51 satisfies the first-stage pressure release criterion, that is, whether or not the pressure is equal to or lower than the first-stage pressure release threshold (step S105). ).
- the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then the discharge control unit 53 applies the tactile sensation.
- the accumulated charge is forcibly discharged (step S120), and the process is terminated.
- step S105 if it is determined in step S105 that the pressure does not satisfy the first-stage pressure release criterion, it is determined whether or not the pressure operation is maintained from the displacement of the pressure determined by the pressure determining unit 51 ( Step S106). If it is determined in step S106 that the pressing operation is maintained, the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge controller 53 (step S107). During the process of step S107, the switching unit 40 turns off the connection between the piezoelectric element 30 and the pressing determination unit 51. On the other hand, if it is determined in step S106 that the pressing operation is not maintained, the process returns to step S104.
- step S107 When the discharge process is completed in step S107, the switching unit 40 turns on the connection between the piezoelectric element 30 and the pressing determination unit 51, and the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 is resumed (step S108). .
- the control unit 50 maintains the pressing operation when the amount of change in pressing determined by the pressing determining unit 51 does not exceed a predetermined amount over a predetermined time (for example, 2 seconds). It is determined that FIG. 5 is a diagram showing a discharge timing when discharging is performed based on the first determination example.
- the detection voltage A indicates a change in voltage generated in the piezoelectric element 30 detected by the press determination unit 51 (that is, a voltage corresponding to the press determined by the press determination unit 51), and the press B is applied to the touch panel 10 by the operating body. It shows real pressure.
- FIG. 5 The operation of FIG. 5 will be described with reference to FIG.
- the control unit 50 causes the tactile sensation control unit 52 to perform the piezoelectric element 30.
- the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge controller 53 (time T 2 to T 3 , step S103).
- the discharge controller 53 time T 2 to T 3 , step S103.
- the determined pressure increases due to the voltage detected by the pressure determination unit 51, and does not fall below the first stage input cancellation threshold (input acceptance cancellation standard) (not shown) (time T 3).
- the control unit 50 does not exceed the predetermined amount (for example, 0.2 N) over the predetermined time (the time T 4 to T 5 , step S106-Yes). )
- the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge control unit 53 (time T 5 to T 6 , step S107).
- detection of pressing by the piezoelectric element 30 is resumed (time T 6 , step S108).
- the input acceptance threshold value in the second stage may be set to the same value as the input acceptance threshold value V 1 of the first stage, considering that already the touch panel 10 is curved by the pressing of the first stage, it may be re-set to a value smaller than the input acceptance threshold value V 1.
- the second stage tactile sensation presentation criterion is that the control unit 50 determines that the pressing operation is maintained in step S106, and the discharge control unit 53 forcibly discharges the electric charge accumulated in the piezoelectric element 30. A new setting may be made later. That is, until the time T 6 in FIG. 6 may be configured not to set the second stage tactile sensation reference.
- the tactile sensation reference in the second stage may be set based on a press pressing determination unit 51 has determined the time T 6 in FIG. For example, based on plus a predetermined pressing on a press pressing determination section 51 has determined at time T 6, it may be set tactile sensation reference.
- FIG. 6 is a diagram showing a discharge timing in the case of discharging based on the second determination example.
- a detection voltage A indicates a change in a detection voltage (a press determined by the press determination unit 51) generated in the piezoelectric element 30 detected by the press determination unit 51, and a press B indicates an actual press on the touch panel 10 by the operating body. ing.
- first stage input release threshold (not shown) does not become less (time T 3 ⁇ T 4, Step S105-No). Then, the pressing becomes the maximum value at the time T 4, and has a minimum value at the time T 5.
- a predetermined number of times about the total number of times the maximum or minimum is 1, to cross the threshold at time T 5 (time T 4 ⁇ T 5, step S106-Yes) the charge accumulated in the piezoelectric element 30 by the discharge control unit 53
- the battery is forcibly discharged (time T 5 to T 6 , step S107). Then, when the discharge process is completed, the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 is resumed (time T 6 , step S108).
- control unit 50 determines whether or not the pressure determined by the pressure determination unit 51 satisfies the first-stage pressure release criterion after restarting the detection of the pressure in step S108 (step S109). ). If it is determined in step S109 that the pressure satisfies the first-stage pressure release criterion, the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then forcibly charges the piezoelectric element 30. The process is terminated (step S120).
- step S109 it is determined whether or not the pressure determined by the pressure determination unit 51 satisfies the second-level tactile sensation presentation standard (step S109). S110).
- step S110 the tactile sensation control unit 52 drives the piezoelectric element 30 to present tactile sensation, and then the discharge control unit 53 applies the tactile sensation to the piezoelectric element 30.
- the accumulated charge is forcibly discharged (step S111).
- step S111 the pressure does not satisfy the second stage tactile sensation presentation criteria
- the process returns to step S108.
- the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 interrupted during step S111 is resumed (step S112).
- the control unit 50 determines whether or not the pressing determined by the pressing determination unit 51 satisfies the second-step pressing release criterion after restarting the voltage detection in step S112 (step S113). If it is determined in step S113 that the pressure satisfies the second-stage pressure release criterion, the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then forcibly charges the piezoelectric element 30. (Step S114), and the subsequent processing is returned to step S104. On the other hand, if it is determined in step S113 that the pressure does not satisfy the second-stage pressure release criterion, it is determined whether or not the pressure operation is maintained based on the pressure determined by the pressure determination unit 51 ( Step S115).
- step S115 The determination process in step S115 is the same as the process described in step S106.
- step S115 the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge control unit 53 (step S116).
- step S116 the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge control unit 53.
- step S116 the process returns to step S112.
- step S117 the detection of the voltage generated in the piezoelectric element by the pressing determination unit 51 interrupted during step S116 is resumed (step S117).
- the control unit 50 determines whether or not the pressing determined by the pressing determination unit 51 satisfies the second-step pressing release criterion after restarting the voltage detection in step S117 (step S118).
- the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then the discharge control unit 53 applies the tactile sensation to the piezoelectric element 30.
- the accumulated charge is forcibly discharged (step S119), and the subsequent processing is returned to step S104.
- the process returns to step S117.
- the control unit 50 determines that the pressing operation is maintained from the change in the voltage generated in the piezoelectric element 30, the control unit 50 accumulates the piezoelectric element 30 in the piezoelectric device 30. By discharging the charged electric charges, it is possible to prevent the pressure applied to the touch panel 10 by the operating body from deviating from the voltage generated in the piezoelectric element 30 that should respond to the pressure, and the pressure can be accurately detected. .
- the electronic device may include not only one but a plurality of piezoelectric elements 30 having a function of detecting a pressure on the touch panel 10 and a function of presenting a tactile sensation to an operating body that presses the touch panel 10.
- the touch panel 10 and the display unit 20 in the description of the above-described embodiment may be configured by an integrated electronic device by providing both functions of the touch panel 10 and the display unit 20 on a common substrate.
- a plurality of photoelectric conversion elements such as photodiodes are regularly arranged on a matrix electrode array of pixel electrodes included in the liquid crystal panel. Some are mixed.
- Such an electronic device displays an image by a liquid crystal panel structure, while reflecting the light of a backlight for liquid crystal display at the tip of a pen for touch-inputting a desired position on the surface of the panel, and this reflected light is reflected by peripheral photoelectric conversion elements.
- the touch position can be detected by receiving the light.
- contact with the input surface 10a is detected using the touch panel 10, but contact is made when a predetermined pressure standard is satisfied using a load sensor (press detection unit). It can also be determined.
- the control unit 50 discharges the electric charge accumulated in the piezoelectric element 30 when it is determined that the pressing operation is maintained from the change in voltage generated in the piezoelectric element 30.
- the present invention is not limited to this, and the control unit 50 discharges the electric charge accumulated in the piezoelectric element 30 when it is determined that the pressing operation is completed from the change in voltage generated in the piezoelectric element 30. May be.
- whether or not the pressing operation has been completed is determined, for example, when the pressing force transition (pressing change) changes from increasing to decreasing, and when the pressing force increase / decrease falls within a certain range, When flattened, etc.
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Abstract
Provided is an electronic device capable of accurately detecting a pressing force on a touch panel. An electronic device (1) is provided with the following: a touch panel (10); a piezoelectric element (30) in which voltage is generated on the basis of a pressing force on a touch panel (10); a control unit (50) that detects the voltage generated by the piezoelectric element (30), drives on the basis of the detected voltage the piezoelectric element (30) so as to present a tactile sensation to the operation body pressing the touch panel (10), and discharges the electrical charge that has accumulated in the piezoelectric element (30). The electronic device is characterised in that in a case where, on the basis of changes in the detected voltage, the control unit (50) has determined that a pressing operation by the operation body is continued, the control unit (50) discharges the electrical charge that has accumulated in the piezoelectric element (30).
Description
本出願は、２０１１年７月２７日に出願された日本国特許出願２０１１－１６４７１７号の優先権を主張するものであり、この先の出願の開示全体を、ここに参照のために取り込む。
This application claims the priority of Japanese Patent Application No. 2011-164717 filed on July 27, 2011, and the entire disclosure of this earlier application is incorporated herein for reference.
本発明は、圧電素子を用いる電子機器に関するものである。
The present invention relates to an electronic device using a piezoelectric element.
携帯電話などの携帯端末において、操作者による操作を検出する部材として、タッチパネルなどの接触検出部を備える電子機器が増えている。また、携帯端末以外に、電卓、券売機などの機器や、電子レンジ、テレビ、照明器具などの家電製品、産業用機器（ＦＡ機器）など、接触検出部を備える電子機器は広く使用されている。
In a mobile terminal such as a mobile phone, an electronic device having a contact detection unit such as a touch panel is increasing as a member for detecting an operation by an operator. In addition to portable terminals, electronic devices having a contact detection unit such as devices such as calculators and ticket machines, household appliances such as microwave ovens, televisions, and lighting devices, and industrial devices (FA devices) are widely used. .
近年では、タッチパネル上で操作者の操作体（指やスタイラスペン）による押圧を検出して、押圧が一定の閾値を超えたときに、操作体に振動等の触感を呈示させる電子機器も存在する。このような電子機器には、コストダウンおよび装置の小型化を図るために、操作体によるタッチパネルに対する押圧の検出と、操作体に対する触感の呈示とを、同一の圧電素子を用いて実現しているものがある。しかし、触感の呈示後に押圧の検出を再開すると、触感の呈示中に圧電素子にたまった電荷の影響により、押圧を正確に検出することができなくなるという問題があった。
In recent years, there is an electronic device that detects an operator's operation body (finger or stylus pen) on the touch panel and presents the operation body with a tactile sensation such as vibration when the pressure exceeds a certain threshold. . In such an electronic device, in order to reduce the cost and reduce the size of the apparatus, detection of pressing on the touch panel by the operating body and presentation of tactile sensation on the operating body are realized using the same piezoelectric element. There is something. However, when the detection of the pressure is resumed after the tactile sensation is presented, there is a problem that the pressure cannot be accurately detected due to the influence of the electric charge accumulated on the piezoelectric element during the tactile sensation.
そこで、触感の呈示後に、押圧の検出に影響を与える圧電素子の残留電荷を強制的に放電させることにより、圧電素子にたまった電荷の影響を軽減させた電子機器が知られている（例えば、特許文献１参照）。図７は、このような放電機能を有する電子機器により検出される圧電素子の電圧を示す図である。
Then, after presenting tactile sensation, an electronic device is known in which the residual charge of the piezoelectric element that affects the detection of pressing is forcibly discharged to reduce the influence of the charge accumulated on the piezoelectric element (for example, Patent Document 1). FIG. 7 is a diagram showing the voltage of the piezoelectric element detected by an electronic device having such a discharge function.
図７において、検出電圧Ａは電子機器により検出される圧電素子の電圧の変化を示しており、押圧Ｂは操作体によるタッチパネルに対する現実の押圧を示している。時刻Ｔ０から操作者が操作体によりタッチパネルの押圧動作を開始する。電子機器は、圧電素子の電圧を検出し、検出電圧Ａが触感呈示閾値電圧Ｖ１を超えると（時刻Ｔ１）、操作体に対して触感を呈示し（時刻Ｔ１～Ｔ２）、続いて圧電素子にたまった残留電荷を強制的にアースに放電させる（時刻Ｔ２～Ｔ３）。そして、電子機器は、時刻Ｔ３から圧電素子の電圧の検出を再開する。ここで、圧電素子の電圧の検出の再開は、放電後の基準電圧レベル（本図では０Ｖ）から行われることになる。検出電圧Ａが押圧解除閾値電圧Ｖ２以下となると、電子機器は操作体に対して触感を呈示し（時刻Ｔ４～Ｔ５）、続いて圧電素子にたまった残留電荷を強制的に放電させる（時刻Ｔ５～Ｔ６）。
In FIG. 7, a detection voltage A indicates a change in voltage of the piezoelectric element detected by the electronic device, and a press B indicates an actual press on the touch panel by the operating body. From time T 0 , the operator starts pressing the touch panel with the operating tool. The electronic device detects the voltage of the piezoelectric element, and when the detected voltage A exceeds the tactile sensation providing threshold voltage V 1 (time T 1 ), the tactile sensation is presented to the operating body (time T 1 to T 2 ). The residual charge accumulated in the piezoelectric element is forcibly discharged to the ground (time T 2 to T 3 ). Then, the electronic device resumes detection of the voltage of the piezoelectric element from the time T 3. Here, the detection of the voltage of the piezoelectric element is restarted from the reference voltage level after discharge (0 V in this figure). When the detection voltage A is press releasing threshold voltage V 2 or less, the electronic device is the tactile sensation to the operation member (time T 4 ~ T 5), is subsequently forcibly discharging the residual charge accumulated in the piezoelectric element (Times T 5 to T 6 ).
上述した図７に示す例では、強制放電がなされた後に、押圧Ｂは減少して直ちに押圧動作が完了している。しかし、同一の押圧箇所に対して、押し込んだ後にさらに押し込む（以下、「２段押し」と称する）といった操作を行う場合など、強制放電がなされた後に、押圧動作が維持される場合もある。図８は、押圧動作が維持される場合における、電子機器の課題を説明する図である。図７と同様に、検出電圧Ａは電子機器により検出される圧電素子の電圧の変化を示しており、押圧Ｂは操作体によるタッチパネルに対する現実の押圧を示している。電子機器は、検出電圧Ａが触感呈示閾値電圧Ｖ１を超えると（時刻Ｔ１）、操作体に対して触感を呈示し（時刻Ｔ１～Ｔ２）、圧電素子にたまった残留電荷を強制的に放電させる（時刻Ｔ２～Ｔ３）。その後、操作者による押圧動作は、時刻Ｔ４～Ｔ５にかけて維持される。操作者が２段押しを行う場合には、図８に示すように、時刻Ｔ５からさらに押圧Ｂが増加する。
In the example shown in FIG. 7 described above, after the forced discharge is performed, the pressure B decreases and the pressing operation is completed immediately. However, the pressing operation may be maintained after the forced discharge is performed, for example, when an operation of further pressing (hereinafter referred to as “two-step pressing”) is performed on the same pressing portion. FIG. 8 is a diagram illustrating a problem of the electronic device when the pressing operation is maintained. Similarly to FIG. 7, the detection voltage A indicates a change in the voltage of the piezoelectric element detected by the electronic device, and the press B indicates an actual press on the touch panel by the operating body. When the detected voltage A exceeds the tactile sensation presentation threshold voltage V 1 (time T 1 ), the electronic device presents a tactile sensation to the operating body (time T 1 to T 2 ), forcing the residual charge accumulated in the piezoelectric element. Discharge (time T 2 to T 3 ). Thereafter, the pressing operation by the operator is maintained from time T 4 to T 5 . If the operator performs a push two stages, as shown in FIG. 8, further pressing B increases from time T 5.
ここで、時刻Ｔ３～Ｔ４で発生した電荷は圧電素子にたまるが、操作者が押圧動作を維持して押圧Ｂがほぼ一定となると、その間に圧電素子にたまった電荷はゼロ点に向けて自然に放電され、検出電圧Ａも徐々に０Ｖに近づく（時刻Ｔ４～Ｔ５）。このように、従来の電子機器では、圧電素子にたまった電荷が自然放電することにより、圧電素子により検出さる電圧が変動し、押圧を正確に検出することができないという問題があった。
Here, the electric charge generated at times T 3 to T 4 accumulates in the piezoelectric element, but when the operator maintains the pressing operation and the pressing B becomes substantially constant, the electric charge accumulated in the piezoelectric element during that time is directed toward the zero point. The detection voltage A gradually approaches 0V (time T 4 to T 5 ). As described above, the conventional electronic device has a problem in that the voltage detected by the piezoelectric element fluctuates due to spontaneous discharge of the electric charge accumulated in the piezoelectric element, and the pressure cannot be accurately detected.
したがって、かかる事情に鑑みてなされた本発明の目的は、操作者の操作体によるタッチパネルに対する押圧と、当該押圧に対応すべき圧電素子の出力とが乖離することを防止し、タッチパネルに対する押圧を正確に検出することが可能な電子機器を提供することにある。
Accordingly, an object of the present invention made in view of such circumstances is to prevent the press on the touch panel by the operator's operating body from deviating from the output of the piezoelectric element that should correspond to the press, and to accurately press the touch on the touch panel. It is an object of the present invention to provide an electronic device that can be detected.
上記課題を解決するため、本発明に係る電子機器は、タッチパネルと、前記タッチパネルに対する押圧に基づき電圧が生じる圧電素子と、前記圧電素子で生じた電圧を検出し、当該検出した電圧に基づいて、前記圧電素子を駆動して前記タッチパネルを押圧する操作体に触感を呈示させ、前記圧電素子に蓄積された電荷を放電させる制御部と、を備え、前記制御部は、前記検出された電圧の変化から、前記操作体による押圧動作が維持されていると判定した場合には、前記圧電素子に蓄積された電荷を放電させることを特徴とする。
In order to solve the above problems, an electronic device according to the present invention detects a voltage generated by a touch panel, a piezoelectric element that generates a voltage based on pressing on the touch panel, and a voltage generated in the piezoelectric element, and based on the detected voltage, A control unit that drives the piezoelectric element to cause the operating body that presses the touch panel to have a tactile sensation and discharges the electric charge accumulated in the piezoelectric element, and the control unit changes the detected voltage Thus, when it is determined that the pressing operation by the operating body is maintained, the charge accumulated in the piezoelectric element is discharged.
さらに、本発明に係る電子機器において、前記制御部は、前記検出された電圧の変化量が、所定の時間にわたり、所定の量を超えないときに、前記押圧動作が維持されていると判定することを特徴とする。
Furthermore, in the electronic device according to the present invention, the control unit determines that the pressing operation is maintained when the detected change amount of the voltage does not exceed a predetermined amount over a predetermined time. It is characterized by that.
さらに、本発明に係る電子機器において、前記制御部は、前記検出された電圧が極大または極小となる回数が、所定の時間内で、所定の回数を超えたときに、前記押圧動作が維持されていると判定する。
Furthermore, in the electronic apparatus according to the present invention, the control unit maintains the pressing operation when the number of times that the detected voltage becomes maximum or minimum exceeds a predetermined number of times within a predetermined time. It is determined that
操作者がタッチパネルに対する押圧を一定に保とうとした際に、圧電素子の電荷を放電することにより、操作者の操作体によるタッチパネルに対する押圧と、当該押圧に対応すべき圧電素子で生じる電圧とが乖離することを防止し、タッチパネルに対する押圧を正確に検出することができるようになる。
When the operator tries to keep the pressure on the touch panel constant, by discharging the electric charge of the piezoelectric element, the pressure on the touch panel by the operator's operating body and the voltage generated at the piezoelectric element corresponding to the pressure are different. This prevents the touch panel from being pressed and accurately detects the pressure on the touch panel.
以下、本発明の実施の形態について、図面を参照して詳細に説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は、本発明による一実施形態に係る電子機器の概略構成を示すブロック図である。図１に示すように、電子機器１は、タッチパネル１０と、表示部２０と、圧電素子３０と、切替部４０と、制御部５０とを備える。制御部５０は、押圧決定部５１と、触感制御部５２と、放電制御部５３とを備える。
FIG. 1 is a block diagram showing a schematic configuration of an electronic device according to an embodiment of the present invention. As shown in FIG. 1, the electronic device 1 includes a touch panel 10, a display unit 20, a piezoelectric element 30, a switching unit 40, and a control unit 50. The control unit 50 includes a pressing determination unit 51, a tactile sensation control unit 52, and a discharge control unit 53.
表示部２０は、例えば、液晶表示パネル（ＬＣＤ）や有機ＥＬ表示パネルなどを用いて構成され、文字、画像、映像などのオブジェクトを表示する。
The display unit 20 is configured using, for example, a liquid crystal display panel (LCD) or an organic EL display panel, and displays objects such as characters, images, and images.
タッチパネル１０は、通常は表示部２０の前面に配置され、表示部２０に表示されたオブジェクトに対する操作体（例えば、指またはスタイラスペン）による接触、または接触の解除を、対応するタッチパネル１０の入力面（操作面）において検出する。なお、タッチパネル１０は、入力面に対する接触位置を検出する検出機能を有するようにしてもよく、検出機能は、例えば抵抗膜方式や静電容量方式などの公知の方式により実現することができる。
The touch panel 10 is normally disposed on the front surface of the display unit 20, and touches an object displayed on the display unit 20 with an operating body (for example, a finger or a stylus pen) or cancels the contact. Detect on (operation surface). Note that the touch panel 10 may have a detection function of detecting a contact position with respect to the input surface, and the detection function can be realized by a known method such as a resistance film method or a capacitance method.
制御部５０は、タッチパネル１０から入力される情報に基づいて実行する処理を決定する。また、制御部５０は、押圧決定部５１により、圧電素子３０で生じる電圧を検出し、検出した電圧に基づいて押圧（押圧値）を決定して、決定した押圧が所定の基準を満たした際に、触感制御部５２により圧電素子３０に駆動信号を印加する。ここで、押圧が所定の基準を満たした際とは、所定の基準を基準値とみたて、押圧が基準値に達した際であってもよいし、押圧が基準値を超えた際でもよいし、基準値と等しい押圧が検出された際でもよい。また、押圧決定部５１は、検出した電圧に対して、ノイズの除去、Ａ／Ｄ変換などを行う。なお、押圧決定部５１は、押圧を電圧の単位のまま扱ってもよいし、ニュートンの単位に変換してもよい。
The control unit 50 determines a process to be executed based on information input from the touch panel 10. In addition, the control unit 50 detects the voltage generated in the piezoelectric element 30 by the pressing determination unit 51, determines the pressing (pressing value) based on the detected voltage, and the determined pressing satisfies a predetermined standard In addition, a drive signal is applied to the piezoelectric element 30 by the tactile sensation control unit 52. Here, the time when the pressure satisfies the predetermined reference may be a time when the pressure reaches the reference value by considering the predetermined reference as a reference value, or may be a time when the pressure exceeds the reference value. And it may be when a pressure equal to the reference value is detected. Moreover, the press determination part 51 performs noise removal, A / D conversion, etc. with respect to the detected voltage. In addition, the press determination part 51 may handle a press with the unit of a voltage, and may convert it into the unit of Newton.
また、制御部５０は、触感制御部５２により圧電素子３０を駆動した後に、放電制御部５３により、圧電素子３０に残留する電荷を強制的にアースに放電させる。また、制御部５０は、押圧決定部５１により決定された押圧の変化から、押圧動作（押圧状態）が維持されているか否かを判定し、押圧動作が維持されていると判定した場合にも、放電制御部５３により圧電素子３０に残留する電荷を強制的にアースに放電させる。ここで、押圧動作（押圧状態）が維持されているとは、例えば、操作者が操作体によりタッチパネル１０を押圧した後、操作体による押圧を弱めたり、さらに強く押し込んだりすることなく、現状の押圧を所定の時間にわたって維持することをいう。
Also, after the piezoelectric element 30 is driven by the tactile sensation controller 52, the controller 50 forcibly discharges the electric charge remaining in the piezoelectric element 30 to the ground by the discharge controller 53. Further, the control unit 50 determines whether or not the pressing operation (pressing state) is maintained from the change in pressing determined by the pressing determination unit 51, and also determines that the pressing operation is maintained. Then, the electric charge remaining in the piezoelectric element 30 is forcibly discharged to the ground by the discharge control unit 53. Here, the pressing operation (pressed state) is maintained, for example, after the operator presses the touch panel 10 with the operating body, and then does not weaken the pressing by the operating body or push in more strongly. This refers to maintaining the pressure for a predetermined time.
圧電素子３０は、タッチパネル１０の入力面が操作体により押圧されることにより撓む（歪む）ように、タッチパネル１０に装着される。この圧電素子３０は、タッチパネル１０に対する押圧を検出する押圧検出部としての機能、およびタッチパネル１０を押圧する操作体に触感を呈示する触感呈示部としての機能を有する。圧電素子３０は、タッチパネル１０の入力面に対する押圧に基づき電圧が生じるものである。タッチパネル１０に対する押圧は、押圧決定部５１が、この押圧に基づき圧電素子３０で生じた電圧を検出することにより求められる（決定される）ものである。また、圧電素子３０は、触感制御部５２により印加される駆動信号に応じて所定の振動パターンによる振動を発生させる。圧電素子３０が振動することにより、タッチパネル１０の入力面に接触している操作体に対して、所定の触感が呈示される。
The piezoelectric element 30 is mounted on the touch panel 10 so that the input surface of the touch panel 10 is bent (distorted) when pressed by the operating body. The piezoelectric element 30 has a function as a press detection unit that detects a press on the touch panel 10 and a function as a tactile sensation providing unit that presents a tactile sensation to the operating body that presses the touch panel 10. The piezoelectric element 30 generates a voltage based on a pressure on the input surface of the touch panel 10. The pressure on the touch panel 10 is obtained (determined) by the pressure determination unit 51 detecting a voltage generated in the piezoelectric element 30 based on the pressure. In addition, the piezoelectric element 30 generates vibration according to a predetermined vibration pattern in accordance with the drive signal applied by the tactile sensation control unit 52. When the piezoelectric element 30 vibrates, a predetermined tactile sensation is presented to the operating body in contact with the input surface of the touch panel 10.
切替部４０は、圧電素子３０の押圧検出部としての機能と、触感呈示部としての機能とを切り替える。図２は、本発明による一実施形態に係る電子機器１の切替部４０の概略構成を示すブロック図であり、押圧決定部５１、触感制御部５２、および圧電素子３０の接続関係を示している。図２に示すように、切替部４０は、切替スイッチ４１，４２と、コンデンサ４３，４４とを備える。圧電素子３０を押圧検出部として機能させる場合には、制御部５０は、切替スイッチ４１および切替スイッチ４２をオンに切り替える。このとき、触感制御部５２の中間電位（例えば、２０Ｖ）と押圧決定部５１の中間電位（例えば、１．３Ｖ）が異なるため、コンデンサ４３およびコンデンサ４４によりＤＣ成分をカットし、ＡＣ成分のみを抽出する。
The switching unit 40 switches between a function as a pressing detection unit of the piezoelectric element 30 and a function as a tactile sensation providing unit. FIG. 2 is a block diagram illustrating a schematic configuration of the switching unit 40 of the electronic device 1 according to an embodiment of the present invention, and illustrates a connection relationship between the pressing determination unit 51, the tactile sensation control unit 52, and the piezoelectric element 30. . As shown in FIG. 2, the switching unit 40 includes changeover switches 41 and 42 and capacitors 43 and 44. When the piezoelectric element 30 is caused to function as a pressing detection unit, the control unit 50 switches the changeover switch 41 and the changeover switch 42 to ON. At this time, since the intermediate potential (for example, 20V) of the tactile sensation control unit 52 and the intermediate potential (for example, 1.3V) of the pressing determination unit 51 are different, the DC component is cut by the capacitor 43 and the capacitor 44, and only the AC component is obtained. Extract.
一方、圧電素子３０を触感呈示部として機能させる場合には、制御部５０は、切替スイッチ４１および切替スイッチ４２をオフに切り替えて、圧電素子３０に印加する駆動信号が押圧決定部５１に入力されないように制御する。また、制御部５０は、放電制御部５３により圧電素子３０にたまった残留電荷を放電させる際にも、切替スイッチ４１および切替スイッチ４２をオフに切り替える。
On the other hand, when the piezoelectric element 30 is caused to function as a tactile sensation providing unit, the control unit 50 switches off the changeover switch 41 and the changeover switch 42 so that the drive signal applied to the piezoelectric element 30 is not input to the press determination unit 51. To control. The control unit 50 also switches the changeover switch 41 and the changeover switch 42 to OFF when the discharge control unit 53 discharges the residual charge accumulated in the piezoelectric element 30.
図３は、図１に示した電子機器１の実装構造の一例を示すもので、図３（ａ）は要部断面図、図３（ｂ）は要部平面図である。表示部２０は、筐体１１内に収納保持される。表示部２０上には、弾性部材からなるインシュレータ１２を介して、タッチパネル１０が保持される。なお、本実施の形態に係る電子機器１は、表示部２０およびタッチパネル１０を、平面視で矩形状としてある。本実施の形態において、タッチパネル１０は、図３（ｂ）に仮想線で示す表示部２０の表示領域Ａから外れた４隅に配設したインシュレータ１２を介して表示部２０上に保持される。
3 shows an example of the mounting structure of the electronic device 1 shown in FIG. 1, FIG. 3 (a) is a cross-sectional view of the main part, and FIG. 3 (b) is a plan view of the main part. The display unit 20 is housed and held in the housing 11. The touch panel 10 is held on the display unit 20 via an insulator 12 made of an elastic member. In electronic device 1 according to the present embodiment, display unit 20 and touch panel 10 are rectangular in plan view. In the present embodiment, the touch panel 10 is held on the display unit 20 via the insulators 12 arranged at the four corners deviated from the display area A of the display unit 20 indicated by virtual lines in FIG.
また、筐体１１には、表示部２０の表示領域から外れたタッチパネル１０の表面領域を覆うようにアッパカバー１３が設けられ、このアッパカバー１３とタッチパネル１０との間に、弾性部材からなるインシュレータ１４が配設される。
The casing 11 is provided with an upper cover 13 so as to cover the surface area of the touch panel 10 that is out of the display area of the display unit 20, and an insulator made of an elastic member is provided between the upper cover 13 and the touch panel 10. 14 is disposed.
なお、図３に示すタッチパネル１０は、入力面１０ａを有する表面部材を、例えば透明フィルムやガラスで構成し、裏面部材をガラスやアクリルで構成している。タッチパネル１０は、入力面１０ａが押圧されると、押圧部分が押圧に応じて微少量撓む（歪む）、または構造体そのものが微少量撓む構造のものを用いる。
In the touch panel 10 shown in FIG. 3, the surface member having the input surface 10 a is made of, for example, a transparent film or glass, and the back member is made of glass or acrylic. The touch panel 10 has a structure in which when the input surface 10a is pressed, the pressed portion is slightly bent (distorted) in response to the pressing, or the structure itself is bent slightly.
タッチパネル１０には、その裏面上で、アッパカバー１３で覆われる一辺または複数辺の近傍、ここでは３辺の近傍に、タッチパネル１０の入力面１０ａに対する押圧を検出するとともに、タッチパネル１０を振動等させて、入力面１０ａを押圧している操作体に触感を呈示するための圧電素子３０をそれぞれ装着する。なお、図３（ｂ）は、図３（ａ）に示した筐体１１、アッパカバー１３およびインシュレータ１４の図示を省略している。
The touch panel 10 detects pressure on the input surface 10a of the touch panel 10 in the vicinity of one side or a plurality of sides covered with the upper cover 13 on the back surface, in this case, near the three sides, and vibrates the touch panel 10 or the like. Then, the piezoelectric elements 30 for providing a tactile sensation to the operating body pressing the input surface 10a are respectively mounted. In FIG. 3B, the casing 11, the upper cover 13, and the insulator 14 shown in FIG. 3A are not shown.
次に、このように構成される本実施形態に係る電子機器１の動作を、図４を参照して説明する。図４は、本実施形態に係る電子機器１の動作を示すフローチャートである。本フローチャートは、２段押しに対応するものである。また、この例では、２段押しをする際には、１段目の押圧後、所定の時間にわたり押圧動作（押圧状態）を維持し、その後さらに２段目の押圧を行うものとして説明する。
Next, the operation of the electronic apparatus 1 according to this embodiment configured as described above will be described with reference to FIG. FIG. 4 is a flowchart showing the operation of the electronic apparatus 1 according to this embodiment. This flowchart corresponds to a two-stage push. In this example, it is assumed that when the second step is pressed, the pressing operation (pressed state) is maintained for a predetermined time after the first step is pressed, and then the second step is further pressed.
電子機器１は、操作体によりタッチパネル１０が押圧されると、押圧決定部５１が圧電素子３０で生じる電圧を検出し、検出した電圧に基づき押圧を決定する（ステップＳ１０１）。そして、押圧決定部５１により決定した押圧が１段目の触感呈示基準を満たす否か、すなわち押圧が１段目の触感呈示閾値を越えるか否かを判定する（ステップＳ１０２）。ステップＳ１０２にて押圧が１段目の触感呈示基準を満たすと判定した場合には、触感制御部５２により圧電素子３０を駆動して触感を呈示し、その後、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（ステップＳ１０３）。ステップＳ１０３の処理の間は、切替部４０により、圧電素子３０と押圧決定部５１との接続をオフにする。一方、ステップＳ１０２にて押圧が１段目の触感呈示基準を満たさないと判定した場合には、処理をステップＳ１０１に戻す。ステップＳ１０３にて放電が行われると、切替部４０により、圧電素子３０と押圧決定部５１との接続をオンにし、押圧決定部５１による圧電素子３０で生じる電圧の検出を再開する（ステップＳ１０４）。
When the touch panel 10 is pressed by the operating body, the electronic device 1 detects the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 and determines the pressing based on the detected voltage (step S101). Then, it is determined whether or not the pressure determined by the pressure determination unit 51 satisfies the first stage tactile sensation presentation criteria, that is, whether or not the pressure exceeds the first stage tactile sensation presentation threshold (step S102). If it is determined in step S102 that the pressure satisfies the first stage tactile sensation presentation criteria, the tactile sensation control unit 52 drives the piezoelectric element 30 to present tactile sensation, and then the discharge control unit 53 applies the tactile sensation to the piezoelectric element 30. The accumulated charge is forcibly discharged (step S103). During the process of step S103, the switching unit 40 turns off the connection between the piezoelectric element 30 and the pressing determination unit 51. On the other hand, if it is determined in step S102 that the pressure does not satisfy the first stage tactile sensation presentation criteria, the process returns to step S101. When the discharge is performed in step S103, the switching unit 40 turns on the connection between the piezoelectric element 30 and the pressing determination unit 51, and restarts the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 (step S104). .
そして、制御部５０は、押圧決定部５１により決定した押圧が１段目の押圧解除基準を満たす否か、すなわち押圧が１段目の押圧解除閾値以下となるか否かを判定する（ステップＳ１０５）。ステップＳ１０５にて押圧が１段目の押圧解除基準を満たすと判定した場合には、触感制御部５２により圧電素子３０を駆動して触感を呈示し、その後、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電し（ステップＳ１２０）、処理を終了する。一方、ステップＳ１０５にて押圧が１段目の押圧解除基準を満たさないと判定した場合には、押圧決定部５１により決定した押圧の変位から、押圧動作が維持されているか否かを判定する（ステップＳ１０６）。ステップＳ１０６にて押圧動作が維持されていると判定した場合には、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（ステップＳ１０７）。ステップＳ１０７の処理の間は、切替部４０により、圧電素子３０と押圧決定部５１との接続をオフにする。一方、ステップＳ１０６にて押圧動作が維持されていないと判定した場合には、処理をステップＳ１０４に戻す。ステップＳ１０７にて放電処理が終了すると、切替部４０により、圧電素子３０と押圧決定部５１との接続をオンにし、押圧決定部５１による圧電素子３０で生じる電圧の検出を再開する（ステップＳ１０８）。
Then, the control unit 50 determines whether or not the pressure determined by the pressure determination unit 51 satisfies the first-stage pressure release criterion, that is, whether or not the pressure is equal to or lower than the first-stage pressure release threshold (step S105). ). When it is determined in step S105 that the pressure satisfies the first-stage pressure release criterion, the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then the discharge control unit 53 applies the tactile sensation. The accumulated charge is forcibly discharged (step S120), and the process is terminated. On the other hand, if it is determined in step S105 that the pressure does not satisfy the first-stage pressure release criterion, it is determined whether or not the pressure operation is maintained from the displacement of the pressure determined by the pressure determining unit 51 ( Step S106). If it is determined in step S106 that the pressing operation is maintained, the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge controller 53 (step S107). During the process of step S107, the switching unit 40 turns off the connection between the piezoelectric element 30 and the pressing determination unit 51. On the other hand, if it is determined in step S106 that the pressing operation is not maintained, the process returns to step S104. When the discharge process is completed in step S107, the switching unit 40 turns on the connection between the piezoelectric element 30 and the pressing determination unit 51, and the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 is resumed (step S108). .
ここで、ステップＳ１０６における押圧動作が維持されているか否かの判定例について説明する。第１の判定例では、制御部５０は、押圧決定部５１により決定された押圧の変化量が、所定の時間にわたり（例えば２秒間）、所定の量を超えないときに、前記押圧動作が維持されていると判定する。図５は、この第１の判定例に基づき放電を行う場合の放電タイミングを示す図である。検出電圧Ａは押圧決定部５１が検出する圧電素子３０で生ずる電圧（すなわち、押圧決定部５１により決定される押圧に対応する電圧）の変化を示しており、押圧Ｂは操作体によるタッチパネル１０に対する現実の押圧を示している。
Here, an example of determining whether or not the pressing operation in step S106 is maintained will be described. In the first determination example, the control unit 50 maintains the pressing operation when the amount of change in pressing determined by the pressing determining unit 51 does not exceed a predetermined amount over a predetermined time (for example, 2 seconds). It is determined that FIG. 5 is a diagram showing a discharge timing when discharging is performed based on the first determination example. The detection voltage A indicates a change in voltage generated in the piezoelectric element 30 detected by the press determination unit 51 (that is, a voltage corresponding to the press determined by the press determination unit 51), and the press B is applied to the touch panel 10 by the operating body. It shows real pressure.
図４を参照しつつ図５の動作を説明する。制御部５０は、押圧決定部５１により決定した押圧が１段目の入力受付閾値（触感呈示基準）Ｖ１を超えると（時刻Ｔ１、ステップＳ１０２－Ｙｅｓ）、触感制御部５２により圧電素子３０を駆動して触感を呈示し（時刻Ｔ１～Ｔ２、ステップＳ１０３）、その後、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（時刻Ｔ２～Ｔ３、ステップＳ１０３）。そして、押圧決定部５１による圧電素子３０で生じる電圧の検出を再開する（時刻Ｔ３、ステップＳ１０４）。その後、図５では押圧決定部５１により検出した電圧により、決定した押圧は増加しており、１段目の入力解除閾値（入力受付解除基準）（図示せず）以下とはならない（時刻Ｔ３～Ｔ４、ステップＳ１０５－Ｎｏ）。そして、制御部５０は、押圧決定部５１により決定した押圧の変化量が、所定の時間にわたり所定の量（例えば、０．２Ｎ）を超えないため（時刻Ｔ４～Ｔ５、ステップＳ１０６－Ｙｅｓ）、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（時刻Ｔ５～Ｔ６、ステップＳ１０７）。そして、放電処理が終了すると、圧電素子３０による押圧の検出を再開する（時刻Ｔ６、ステップＳ１０８）。なお、２段目の入力受付閾値は１段目の入力受付閾値Ｖ１と同じ値に設定してもよいし、１段目の押圧によりすでにタッチパネル１０が湾曲していることを考慮して、入力受付閾値Ｖ１よりも小さい値に再設定してもよい。なお、２段目の触感呈示基準は、制御部５０が、ステップＳ１０６において、押圧動作が維持されていると判定し、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させた後に、新たに設定してもよい。つまり、図６の時刻Ｔ６までは、２段目の触感呈示基準を設定しないようにしてもよい。このようにすることにより、予め１段目の触感呈示基準および２段目の触感呈示基準が設定される場合および図６の時刻Ｔ３で２段目の触感呈示基準が設定される場合と比較して、１段目の触感呈示基準を満たす（超える）押圧を加えたユーザが押圧動作を誤り、意図せず２段目の触感呈示基準まで満たす（超える）押圧を加えてしまうという誤操作が生じるおそれを低減することができる。なお、２段目の触感呈示基準は、図６の時刻Ｔ６に押圧決定部５１が決定した押圧に基づいて設定してもよい。例えば、時刻Ｔ６に押圧決定部５１が決定した押圧に所定の押圧を加えたものに基づき、触感呈示基準を設定してもよい。
The operation of FIG. 5 will be described with reference to FIG. When the pressure determined by the pressure determination unit 51 exceeds the first stage input acceptance threshold (tactile sensation presentation standard) V 1 (time T 1 , Step S102-Yes), the control unit 50 causes the tactile sensation control unit 52 to perform the piezoelectric element 30. To provide a tactile sensation (time T 1 to T 2 , step S103), and thereafter, the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge controller 53 (time T 2 to T 3 , step S103). ). Then, it resumes detection of voltage generated by the piezoelectric element 30 by the pressing determination unit 51 (time T 3, step S104). Thereafter, in FIG. 5, the determined pressure increases due to the voltage detected by the pressure determination unit 51, and does not fall below the first stage input cancellation threshold (input acceptance cancellation standard) (not shown) (time T 3). To T 4 , Step S105-No). Then, the control unit 50 does not exceed the predetermined amount (for example, 0.2 N) over the predetermined time (the time T 4 to T 5 , step S106-Yes). ), The electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge control unit 53 (time T 5 to T 6 , step S107). Then, when the discharge process is completed, detection of pressing by the piezoelectric element 30 is resumed (time T 6 , step S108). The input acceptance threshold value in the second stage may be set to the same value as the input acceptance threshold value V 1 of the first stage, considering that already the touch panel 10 is curved by the pressing of the first stage, it may be re-set to a value smaller than the input acceptance threshold value V 1. Note that the second stage tactile sensation presentation criterion is that the control unit 50 determines that the pressing operation is maintained in step S106, and the discharge control unit 53 forcibly discharges the electric charge accumulated in the piezoelectric element 30. A new setting may be made later. That is, until the time T 6 in FIG. 6 may be configured not to set the second stage tactile sensation reference. By doing so, compared to the case of pre-first stage tactile sensation reference and the second stage of the second-stage tactile sensation reference at time T 3 in the case and 6 tactile sensation criterion is set is set Thus, a user who has applied a pressure that satisfies (exceeds) the first stage tactile sensation presentation error causes an erroneous operation in which the user performs an erroneous operation and unintentionally adds a pressure that satisfies (exceeds) the second stage tactile sensation presentation standard. The fear can be reduced. Incidentally, the tactile sensation reference in the second stage may be set based on a press pressing determination unit 51 has determined the time T 6 in FIG. For example, based on plus a predetermined pressing on a press pressing determination section 51 has determined at time T 6, it may be set tactile sensation reference.
次に、ステップＳ１０６における押圧動作が維持されているか否かの第２の判定例について説明する。第２の判定例では、制御部５０は、押圧決定部５１により決定された押圧が極大または極小となる回数が、所定の時間内で、所定の回数を超えたときに、前記押圧動作が維持されていると判定する。図６は、この第２の判定例に基づき放電を場合の放電タイミングを示す図である。検出電圧Ａは押圧決定部５１が検出する圧電素子３０で生じる検出電圧（押圧決定部５１により決定される押圧）の変化を示しており、押圧Ｂは操作体によるタッチパネル１０に対する現実の押圧を示している。
Next, a second determination example of whether or not the pressing operation in step S106 is maintained will be described. In the second determination example, the control unit 50 maintains the pressing operation when the number of times that the pressure determined by the pressure determination unit 51 is maximum or minimum exceeds a predetermined number of times within a predetermined time. It is determined that FIG. 6 is a diagram showing a discharge timing in the case of discharging based on the second determination example. A detection voltage A indicates a change in a detection voltage (a press determined by the press determination unit 51) generated in the piezoelectric element 30 detected by the press determination unit 51, and a press B indicates an actual press on the touch panel 10 by the operating body. ing.
時刻Ｔ３までは上述した図５と同様であるため、時刻Ｔ３以降の動作を、図４を参照して説明する。時刻Ｔ３以降、押圧決定部５１により決定した押圧は増加しており、１段目の入力解除閾値（図示せず）以下とはならない（時刻Ｔ３～Ｔ４、ステップＳ１０５－Ｎｏ）。そして、時刻Ｔ４で押圧は極大値となり、時刻Ｔ５で極小値となっている。極大または極小となる合計回数に関する所定の回数を１とすると、時刻Ｔ５で閾値を越えるため（時刻Ｔ４～Ｔ５、ステップＳ１０６－Ｙｅｓ）放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（時刻Ｔ５～Ｔ６、ステップＳ１０７）。そして、放電処理が終了すると、押圧決定部５１による圧電素子３０で生じる電圧の検出を再開する（時刻Ｔ６、ステップＳ１０８）。
Because until time T 3 is similar to FIG. 5 described above, the time T 3 after the operation will be described with reference to FIG. Time T 3 after pressing is increasing as determined by pressing determination unit 51, first stage input release threshold (not shown) does not become less (time T 3 ~ T 4, Step S105-No). Then, the pressing becomes the maximum value at the time T 4, and has a minimum value at the time T 5. When a predetermined number of times about the total number of times the maximum or minimum is 1, to cross the threshold at time T 5 (time T 4 ~ T 5, step S106-Yes) the charge accumulated in the piezoelectric element 30 by the discharge control unit 53 The battery is forcibly discharged (time T 5 to T 6 , step S107). Then, when the discharge process is completed, the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 is resumed (time T 6 , step S108).
再び図４を参照すると、制御部５０は、ステップＳ１０８にて押圧の検出を再開した後に、押圧決定部５１により決定した押圧が１段目の押圧解除基準を満たす否かを判定する（ステップＳ１０９）。ステップＳ１０９にて押圧が１段目の押圧解除基準を満たすと判定した場合には、触感制御部５２により圧電素子３０を駆動して触感を呈示し、その後、圧電素子３０にたまった電荷を強制的に放電させ（ステップＳ１２０）、処理を終了する。一方、ステップＳ１０９にて押圧が１段目の押圧解除基準を満たさないと判定した場合には、押圧決定部５１により決定した押圧が２段目の触感呈示基準を満たす否かを判定する（ステップＳ１１０）。ステップＳ１１０にて押圧が２段目の触感呈示基準を満たすと判定した場合には、触感制御部５２により圧電素子３０を駆動して触感を呈示し、その後、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（ステップＳ１１１）。一方、ステップＳ１１１にて押圧が２段目の触感呈示基準を満たさないと判定した場合には、処理をステップＳ１０８に戻す。ステップＳ１１１にて放電処理が終了すると、ステップＳ１１１の間中断していた押圧決定部５１による圧電素子３０で生じる電圧の検出を再開する（ステップＳ１１２）。
Referring to FIG. 4 again, the control unit 50 determines whether or not the pressure determined by the pressure determination unit 51 satisfies the first-stage pressure release criterion after restarting the detection of the pressure in step S108 (step S109). ). If it is determined in step S109 that the pressure satisfies the first-stage pressure release criterion, the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then forcibly charges the piezoelectric element 30. The process is terminated (step S120). On the other hand, if it is determined in step S109 that the pressure does not satisfy the first-stage pressure release criterion, it is determined whether or not the pressure determined by the pressure determination unit 51 satisfies the second-level tactile sensation presentation standard (step S109). S110). When it is determined in step S110 that the pressure satisfies the second stage tactile sensation presentation criteria, the tactile sensation control unit 52 drives the piezoelectric element 30 to present tactile sensation, and then the discharge control unit 53 applies the tactile sensation to the piezoelectric element 30. The accumulated charge is forcibly discharged (step S111). On the other hand, if it is determined in step S111 that the pressure does not satisfy the second stage tactile sensation presentation criteria, the process returns to step S108. When the discharge process is completed in step S111, the detection of the voltage generated in the piezoelectric element 30 by the pressing determination unit 51 interrupted during step S111 is resumed (step S112).
制御部５０は、ステップＳ１１２にて電圧の検出を再開した後に、押圧決定部５１により決定した押圧が２段目の押圧解除基準を満たす否かを判定する（ステップＳ１１３）。ステップＳ１１３にて押圧が２段目の押圧解除基準を満たすと判定した場合には、触感制御部５２により圧電素子３０を駆動して触感を呈示し、その後、圧電素子３０にたまった電荷を強制的に放電させ（ステップＳ１１４）、その後の処理をステップＳ１０４に戻す。一方、ステップＳ１１３にて押圧が２段目の押圧解除基準を満たさないと判定した場合には、押圧決定部５１により決定した押圧に基づいて、押圧動作が維持されているか否かを判定する（ステップＳ１１５）。ステップＳ１１５による判定処理はステップＳ１０６にて説明した処理と同じである。ステップＳ１１５にて押圧動作が維持されていると判定した場合には、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させる（ステップＳ１１６）。一方、ステップＳ１１５にて押圧動作が維持されていないと判定した場合には、処理をステップＳ１１２に戻す。ステップＳ１１６にて放電処理が終了すると、ステップＳ１１６の間中断していた押圧決定部５１による圧電素子で生じる電圧の検出を再開する（ステップＳ１１７）。
The control unit 50 determines whether or not the pressing determined by the pressing determination unit 51 satisfies the second-step pressing release criterion after restarting the voltage detection in step S112 (step S113). If it is determined in step S113 that the pressure satisfies the second-stage pressure release criterion, the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then forcibly charges the piezoelectric element 30. (Step S114), and the subsequent processing is returned to step S104. On the other hand, if it is determined in step S113 that the pressure does not satisfy the second-stage pressure release criterion, it is determined whether or not the pressure operation is maintained based on the pressure determined by the pressure determination unit 51 ( Step S115). The determination process in step S115 is the same as the process described in step S106. When it is determined in step S115 that the pressing operation is maintained, the electric charge accumulated in the piezoelectric element 30 is forcibly discharged by the discharge control unit 53 (step S116). On the other hand, if it is determined in step S115 that the pressing operation is not maintained, the process returns to step S112. When the discharge process is completed in step S116, the detection of the voltage generated in the piezoelectric element by the pressing determination unit 51 interrupted during step S116 is resumed (step S117).
制御部５０は、ステップＳ１１７にて電圧の検出を再開した後に、押圧決定部５１により決定した押圧が２段目の押圧解除基準を満たす否かを判定する（ステップＳ１１８）。ステップＳ１１８にて押圧が２段目の押圧解除基準を満たすと判定した場合には、触感制御部５２により圧電素子３０を駆動して触感を呈示し、その後、放電制御部５３により圧電素子３０にたまった電荷を強制的に放電させ（ステップＳ１１９）、その後の処理をステップＳ１０４に戻す。一方、ステップＳ１１８にて押圧が２段目の押圧解除基準を満たさないと判定した場合には、処理をステップＳ１１７に戻す。
The control unit 50 determines whether or not the pressing determined by the pressing determination unit 51 satisfies the second-step pressing release criterion after restarting the voltage detection in step S117 (step S118). When it is determined in step S118 that the pressure satisfies the second-stage pressure release criterion, the tactile sensation control unit 52 drives the piezoelectric element 30 to present a tactile sensation, and then the discharge control unit 53 applies the tactile sensation to the piezoelectric element 30. The accumulated charge is forcibly discharged (step S119), and the subsequent processing is returned to step S104. On the other hand, if it is determined in step S118 that the pressure does not satisfy the second-stage pressure release criterion, the process returns to step S117.
このように、本発明に係る電子機器１によれば、制御部５０は、圧電素子３０で生じる電圧の変化から、押圧動作が維持されていると判定した場合には、圧電素子３０に蓄積された電荷を放電させることにより、操作体によるタッチパネル１０に対する押圧と、当該押圧に対応すべき圧電素子３０で生じる電圧とが乖離することを防止し、押圧を正確に検出することができるようになる。
As described above, according to the electronic device 1 according to the present invention, when the control unit 50 determines that the pressing operation is maintained from the change in the voltage generated in the piezoelectric element 30, the control unit 50 accumulates the piezoelectric element 30 in the piezoelectric device 30. By discharging the charged electric charges, it is possible to prevent the pressure applied to the touch panel 10 by the operating body from deviating from the voltage generated in the piezoelectric element 30 that should respond to the pressure, and the pressure can be accurately detected. .
本発明は、上述した実施形態にのみ限定されるものではなく、幾多の変形または変更が可能である。例えば、電子機器は、タッチパネル１０に対する押圧を検出する機能、およびタッチパネル１０を押圧する操作体に触感を呈示する機能を有する圧電素子３０を、１つだけではなく複数備えてもよい。
The present invention is not limited to the above-described embodiment, and many variations or modifications are possible. For example, the electronic device may include not only one but a plurality of piezoelectric elements 30 having a function of detecting a pressure on the touch panel 10 and a function of presenting a tactile sensation to an operating body that presses the touch panel 10.
また、上述した実施形態においては、タッチパネル１０を表示部２０の上面に重ねて配置した構成を想定して説明したが、必ずしもこのような構成にする必要はなく、タッチパネル１０と表示部２０とを離間した構成にしてもよい。
Moreover, in embodiment mentioned above, although demonstrated supposing the structure which has arrange | positioned the touch panel 10 on the upper surface of the display part 20, it does not necessarily need to be such a structure and the touch panel 10 and the display part 20 are made. A separated configuration may also be used.
また、上述した実施形態の説明におけるタッチパネル１０および表示部２０は、タッチパネル１０および表示部２０の両機能を共通の基板に持たせるなどにより、一体化した電子機器によって構成されてもよい。このようなタッチパネル１０および表示部２０の両機能を一体化した装置の構成の一例としては、液晶パネルが有するマトリクス状配列の画素電極群に、フォトダイオードなどの複数の光電変換素子を規則的に混在させたものがある。かかる電子機器は、液晶パネル構造によって画像を表示する一方で、パネル表面の所望位置をタッチ入力するペンの先端で液晶表示用のバックライトの光を反射し、この反射光を周辺の光電変換素子が受光することにより、タッチ位置を検出することができる。
Further, the touch panel 10 and the display unit 20 in the description of the above-described embodiment may be configured by an integrated electronic device by providing both functions of the touch panel 10 and the display unit 20 on a common substrate. As an example of the configuration of the device in which both functions of the touch panel 10 and the display unit 20 are integrated, a plurality of photoelectric conversion elements such as photodiodes are regularly arranged on a matrix electrode array of pixel electrodes included in the liquid crystal panel. Some are mixed. Such an electronic device displays an image by a liquid crystal panel structure, while reflecting the light of a backlight for liquid crystal display at the tip of a pen for touch-inputting a desired position on the surface of the panel, and this reflected light is reflected by peripheral photoelectric conversion elements. The touch position can be detected by receiving the light.
また、上述した実施形態では、タッチパネル１０を用いて入力面１０ａに対する接触を検出したが、荷重センサ（押圧検出部）を用いて、所定の押圧の基準を満たした場合に、接触がなされたものと判定することもできる。
In the embodiment described above, contact with the input surface 10a is detected using the touch panel 10, but contact is made when a predetermined pressure standard is satisfied using a load sensor (press detection unit). It can also be determined.
また、上述した実施形態の説明において、「超える」「以下となる」といった表現は必ずしも厳密な意味ではなく、閾値を「超える」とは閾値以上となった場合も包含し得るものとし、閾値「以下となる」とは閾値未満となった場合も包含し得るものとする。
Further, in the description of the above-described embodiment, expressions such as “exceed” and “below” are not necessarily strict meanings, and “exceeding the threshold value” can also include a case where the threshold value “is exceeded”. "Becomes below" can include cases where the value is less than the threshold.
また、上述した実施形態では、制御部５０は、圧電素子３０で生じる電圧の変化から、押圧動作が維持されていると判定した場合には、圧電素子３０に蓄積された電荷を放電させているが、本発明はこれに限定されずに、制御部５０は、圧電素子３０で生じる電圧の変化から、押圧動作が完了したと判定した場合には、圧電素子３０に蓄積された電荷を放電させてもよい。ここで、押圧動作が完了したかどうかは、例えば、押下力推移（押圧の変化）が増加から減少に転じたとき、押下力増減が一定範囲内で収まるようになったとき、押下力曲線が平らになったとき、などである。
In the above-described embodiment, the control unit 50 discharges the electric charge accumulated in the piezoelectric element 30 when it is determined that the pressing operation is maintained from the change in voltage generated in the piezoelectric element 30. However, the present invention is not limited to this, and the control unit 50 discharges the electric charge accumulated in the piezoelectric element 30 when it is determined that the pressing operation is completed from the change in voltage generated in the piezoelectric element 30. May be. Here, whether or not the pressing operation has been completed is determined, for example, when the pressing force transition (pressing change) changes from increasing to decreasing, and when the pressing force increase / decrease falls within a certain range, When flattened, etc.
１ 電子機器
１０ タッチパネル
１０ａ 入力面
１１ 筐体
１２，１４ インシュレータ
１３ アッパカバー
２０ 表示部
３０ 圧電素子
４０ 切替部
４１，４２ 切替スイッチ
４３，４４ コンデンサ
５０ 制御部
５１ 押圧決定部
５２ 触感制御部
５３ 放電制御部 DESCRIPTION OFSYMBOLS 1 Electronic device 10 Touchscreen 10a Input surface 11 Housing | casing 12,14 Insulator 13 Upper cover 20 Display part 30 Piezoelectric element 40 Switching part 41,42 Changeover switch 43,44 Capacitor 50 Control part 51 Press decision part 52 Tactile sense control part 53 Discharge control Part
１０ タッチパネル
１０ａ 入力面
１１ 筐体
１２，１４ インシュレータ
１３ アッパカバー
２０ 表示部
３０ 圧電素子
４０ 切替部
４１，４２ 切替スイッチ
４３，４４ コンデンサ
５０ 制御部
５１ 押圧決定部
５２ 触感制御部
５３ 放電制御部 DESCRIPTION OF
Claims (3)
- タッチパネルと、
前記タッチパネルに対する押圧に基づき電圧が生じる圧電素子と、
前記圧電素子で生じた電圧を検出し、当該検出した電圧に基づいて、前記圧電素子を駆動して前記タッチパネルを押圧する操作体に触感を呈示させ、前記圧電素子に蓄積された電荷を放電させる制御部と、を備え、
前記制御部は、前記検出された電圧の変化から、前記操作体による押圧動作が維持されていると判定した場合には、前記圧電素子に蓄積された電荷を放電させることを特徴とする電子機器。 A touch panel;
A piezoelectric element that generates a voltage based on a pressure on the touch panel;
A voltage generated in the piezoelectric element is detected, and based on the detected voltage, the piezoelectric element is driven to cause the operation body that presses the touch panel to have a tactile sensation, and the electric charge accumulated in the piezoelectric element is discharged. A control unit,
The control device discharges the electric charge accumulated in the piezoelectric element when it is determined from the detected voltage change that the pressing operation by the operating body is maintained. . - 前記制御部は、前記検出された電圧の変化量が、所定の時間にわたり、所定の量を超えないときに、前記押圧動作が維持されていると判定することを特徴とする、請求項１に記載の電子機器。 The said control part determines with the said press operation being maintained when the variation | change_quantity of the detected voltage does not exceed predetermined amount over predetermined time, It is characterized by the above-mentioned. The electronic device described.
- 前記制御部は、前記検出された電圧が極大または極小となる回数が、所定の時間内で、所定の回数を超えたときに、前記押圧動作が維持されていると判定することを特徴とする、請求項１に記載の電子機器。 The control unit determines that the pressing operation is maintained when the number of times the detected voltage becomes maximum or minimum exceeds a predetermined number of times within a predetermined time. The electronic device according to claim 1.
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| JPWO2019049375A1 (en) * | 2017-09-11 | 2020-11-19 | 富士通株式会社 | Control devices, electronic devices, and control methods for electronic devices |
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