JP6000642B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device including a panel such as a touch panel.

  In recent years, a user's operation is detected in a mobile terminal such as a smartphone, an information device such as a tablet PC, a calculator, and a ticket vending machine, a home appliance such as a microwave oven, a television, and a lighting fixture, and an industrial device (FA device). Electronic devices equipped with a touch panel are widely used as members.

  For such a touch panel, various systems such as a resistive film system, a capacitance system, and an optical system are known. However, any type of touch panel detects an operation with a user's finger or a stylus pen, and the touch panel itself is not physically displaced like a push button switch even when touched. For this reason, even if a user performs operation with respect to a touch panel, the feedback with respect to the said operation cannot be obtained.

  Therefore, a feedback method that generates vibration when an operation on the touch panel is detected has been proposed (see, for example, Patent Document 1). Patent Document 1 describes an example in which a piezoelectric element is used as a vibrating portion. The vibration unit can generate vibration by bending the touch panel by expanding and contracting the piezoelectric element. In this way, the input device described in Patent Literature 1 can present a tactile sensation when the user operates the touch panel.

JP 2011-34150 A

  By the way, the inventor vibrates the panel by applying a predetermined electric signal (sound signal) to the piezoelectric element, and transmits the vibration of the panel to the human body to transmit the air conduction sound and the vibration sound to the user. We studied new electronic devices with functions.

  The inventor installs such a piezoelectric element for sound transmission and a piezoelectric element for tactile sensation presentation as described in Patent Document 1 on one panel, thereby presenting tactile sensation and sound output with one device. It was assumed that both transmissions would be realized.

  However, while a plurality of piezoelectric elements having different applications are attached to one panel and installed, and a vibration is generated by driving a piezoelectric element for sound transmission, a piezoelectric element for presenting tactile sensation is provided. When driven, inconvenience occurs due to interference of vibrations of both piezoelectric elements.

  Such inconvenience may occur in addition to the piezoelectric element for transmitting both the air conduction sound and the vibration sound as described above in addition to the piezoelectric element for presenting the tactile sensation. For example, in addition to the piezoelectric element for presenting tactile sensation, when a piezoelectric element for transmitting one of air conduction sound and vibration sound or a piezoelectric element for presenting tactile sensation having different resonance frequencies is installed, Inconvenience may occur.

  An object of the present invention made in view of such circumstances is that even if both a piezoelectric element for presenting tactile sensation and a piezoelectric element for sound transmission are arranged on a panel, noise during a call due to vibration of both piezoelectric elements is provided. An object of the present invention is to provide an electronic device capable of reducing the above.

The electronic device according to the present invention is
A touch panel provided with a first piezoelectric element and a second piezoelectric element;
The first piezoelectric element is driven based on the touch on the touch panel, and the control is performed according to the position of the touch on the touch panel, and the second piezoelectric element is driven during the call function to generate sound. A control unit that outputs a control unit,
A proximity sensor that detects that an object has approached the touch panel ,
When the control unit detects that an object is close to the touch panel during execution of the call function, the control unit performs a process according to the position of the touch on the touch panel without driving the first piezoelectric element. It is characterized by doing.

Also, the first piezoelectric element, the long sides of the first piezoelectric element is disposed along one side of the touch panel, the second piezoelectric element is, the long sides the one side of the second piezoelectric element It may be arranged on the outer side of the first piezoelectric element along the center of the touch panel .

  According to the electronic device of the present invention, even when both the piezoelectric element for presenting tactile sensation and the piezoelectric element for sound transmission are disposed on the panel, noise during a call due to vibration of both piezoelectric elements is reduced. be able to.

It is a functional block diagram of the electronic device which concerns on 1st Embodiment of this invention. It is a figure which shows an example of the mounting structure of the electronic device which concerns on 1st Embodiment. It is a flowchart explaining the process by the electronic device which concerns on 1st Embodiment. It is a flowchart explaining the process by the electronic device which concerns on 2nd Embodiment.

(First embodiment)
Hereinafter, embodiments of an electronic apparatus according to a first embodiment of the present invention will be described with reference to the drawings. The electronic device according to the present invention can be a mobile phone, a smartphone, a tablet PC, or the like provided with a touch panel. However, the present invention is not limited to these portable devices, and can be various electronic devices such as home appliances, industrial devices (FA devices), and dedicated terminals provided with a touch panel.

  FIG. 1 is a functional block diagram of an electronic apparatus according to the first embodiment of the present invention.

  As shown in FIG. 1, the electronic device 1 according to the first embodiment of the present invention includes a panel 10, a display unit 20, a first piezoelectric element 31, a second piezoelectric element 32, an input unit 40, a control unit 50, and a proximity. A sensor 80 is provided.

  The panel 10 can be a touch panel that detects contact, a cover panel that protects the display unit 20, or the like. The panel 10 is preferably formed of a synthetic resin such as glass or acrylic. The panel 10 is made of, for example, glass or a synthetic resin such as acrylic. The shape of the panel 10 may be a plate shape. The panel 10 may be a flat plate or a curved panel whose surface is inclined smoothly. When the panel 10 is a touch panel, it detects contact of a user's finger or stylus pen. The detection method of the touch panel should be an arbitrary method such as a capacitance method, a resistance film method, an optical method, a surface acoustic wave method (or an ultrasonic method), an infrared method, an electromagnetic induction method, and a load detection method. Can do.

  In addition, the panel 10 is preferably arranged in a housing or the like so as to be vibrated by an appropriate means. That is, if all the edges of the panel 10 are firmly fixed to a housing or the like, the amplitude when the panel 10 is vibrated cannot be gained, and a good tactile sensation cannot be presented to the user. Therefore, for example, the panel 10 is disposed in the housing via an elastic member, or the panel 10 is partially fixed to the housing, so that the panel 10 can be vibrated and disposed in the housing. It is preferable to install them.

  When the panel 10 is formed of a member such as a touch panel, the panel 10 detects contact with a touch surface such as a user's finger or stylus pen, and outputs information on the position of the contact. With this output, the control unit 50 can acquire the position of the contact detected by the panel 10.

  The display unit 20 is a display device such as a liquid crystal display, an organic EL display, or an inorganic EL display. The display unit 20 can display various information, images, and objects such as keys and buttons on the screen. The display unit 20 is provided on the back surface of the panel 10. The display unit 20 is disposed on the back surface of the panel 10 by a bonding member (for example, an adhesive). The display unit 20 may be disposed apart from the panel 10 and supported by the housing of the electronic device 1. In the case where the panel 10 is configured with a member such as a touch panel, it is preferable that the panel 10 is configured with, for example, a transparent member and the display unit 20 is disposed on the back side thereof. In this case, an object such as a key or a button can be drawn and displayed on the display unit 20 and an operation of the user pressing the object can be detected on the panel 10.

  The first piezoelectric element 31 and the second piezoelectric element 32 are elements that expand or contract or bend according to an electromechanical coupling coefficient of a constituent material by applying an electric signal (voltage). These piezoelectric elements are made of, for example, ceramic or quartz. The first piezoelectric element 31 and the second piezoelectric element 32 can be unimorphs, bimorphs, or stacked piezoelectric elements. The stacked piezoelectric element includes a stacked bimorph element in which bimorphs are stacked (for example, 16 layers or 24 layers are stacked). The laminated piezoelectric element is composed of a laminated structure of a plurality of dielectric layers made of, for example, PZT (lead zirconate titanate) and electrode layers arranged between the plurality of dielectric layers. A unimorph expands and contracts when an electric signal (voltage) is applied, and a bimorph bends when an electric signal (voltage) is applied.

  The first piezoelectric element 31 and the second piezoelectric element 32 are preferably disposed on the back surface of the panel 10 (the surface on the inner side of the electronic device 1). The first piezoelectric element 31 and the second piezoelectric element 32 are attached to the panel 10 by a joining member (for example, double-sided tape). Further, the first piezoelectric element 31 and the second piezoelectric element 32 may be attached to the panel 10 via an intermediate member (for example, a sheet metal). The first piezoelectric element 31 and the second piezoelectric element 32 are arranged on the back surface of the panel 10 and are separated from the inner surface of the housing by a predetermined distance. It is preferable that the first piezoelectric element 31 and the second piezoelectric element 32 be separated from the surface on the inner side of the housing by a predetermined distance even in a stretched or bent state. That is, the distance between the first piezoelectric element 31 and the second piezoelectric element 32 and the inner surface of the housing is set to be larger than the maximum deformation amount of the first piezoelectric element 31 and the second piezoelectric element 32. Is preferred.

  In the present embodiment, the first piezoelectric element 31 is a piezoelectric element mainly used for presenting a tactile sensation. Therefore, it is desirable that the first piezoelectric element 31 is designed so as to have a frequency characteristic suitable for presenting a predetermined tactile sensation based on the electrical signal from the control unit 50. On the other hand, in the present embodiment, the second piezoelectric element 32 is a piezoelectric element mainly used for transmitting sound. Therefore, it is desirable that the second piezoelectric element 32 is designed so as to have a frequency characteristic suitable for transmitting a predetermined sound based on an electric signal from the control unit 50. Thus, in the present embodiment, the first piezoelectric element and the second piezoelectric element are disposed on the panel 10 as different piezoelectric elements.

  The input unit 40 detects a user's input operation and includes, for example, operation buttons (operation keys). The user's input operation detected by the input unit 40 is sent to the control unit 50 as an electrical signal. In addition, when the panel 10 is a touch panel, the panel 10 can also detect the contact from a user.

  The control unit 50 is a processor that controls the electronic device 1. The controller 50 applies a predetermined electrical signal to the first piezoelectric element 31 and the second piezoelectric element 32. When the panel 10 detects contact, the control unit 50 applies an electrical signal to the first piezoelectric element 31 to drive the first piezoelectric element 31.

  Further, the control unit 50 applies an electrical signal to the second piezoelectric element 32, drives the second piezoelectric element 32, and controls sound output. In this way, when the sound output is controlled by driving the second piezoelectric element 32, the control unit 50 is based on a sound output trigger from a predetermined application or the like (based on a sound signal (sound signal) or the like). It can be controlled to drive the second piezoelectric element 32.

  The voltage applied by the control unit 50 to the second piezoelectric element 32 is higher than ± 5 V, which is an applied voltage of a so-called panel speaker for the purpose of conducting sound by air conduction sound, not vibration sound, for example. , ± 15V. Thus, even when the user presses the panel 10 against his / her body with a force of 3N or more (5N to 10N), for example, the panel 10 is caused to vibrate sufficiently, and a part of the user's body is The vibration sound transmitted through can be generated. Note that how much applied voltage is used can be appropriately adjusted according to the fixing strength of the panel 10 to the housing or the support member or the performance of the first piezoelectric element 31 or the second piezoelectric element 32.

  When the control unit 50 applies an electrical signal to the first piezoelectric element 31 and the second piezoelectric element 32, the first piezoelectric element 31 and the second piezoelectric element 32 to which the electrical signal is applied extend and contract in the long side direction of each element. . At this time, the panel 10 to which the first piezoelectric element 31 and the second piezoelectric element 32 are attached is deformed according to the expansion and contraction of the first piezoelectric element 31 and the second piezoelectric element 32, and the panel 10 vibrates.

  When the second piezoelectric element 32 expands and contracts and the panel 10 vibrates, the panel 10 generates air conduction sound, and when the user touches a part of the body (for example, the cartilage of the outer ear), A vibration sound transmitted through a part is generated. The control unit 50 transmits the air conduction sound and the vibration sound to the object in contact with the panel 10. For example, the control unit 50 can apply an electric signal corresponding to an audio signal related to the voice of the other party to the second piezoelectric element 32, for example, and generate air conduction sound and vibration sound corresponding to the audio signal. The audio signal may relate to a ringing melody or a music piece including music. Note that the audio signal applied to the electrical signal may be based on music data stored in the internal memory of the electronic device 1, or music data stored in an external server or the like is reproduced via a network. May be.

  The panel 10 vibrates not only in the attachment region to which the second piezoelectric element 32 is attached, but also in a region away from the attachment region. The panel 10 has a plurality of locations that vibrate in a direction intersecting with the main surface of the panel 10 in a region where the vibration is generated, and the amplitude value of the vibration at each of the plurality of locations increases from plus to minus with time. And vice versa. At a certain moment, the panel 10 vibrates in such a manner that a portion having a relatively large vibration amplitude and a portion having a relatively small vibration amplitude are distributed randomly or periodically throughout the panel 10 at first glance. That is, vibrations of a plurality of waves are detected over the entire area of the panel 10. Even when the user presses the panel 10 against his / her body with a force of 5N to 10N, for example, the control unit 50 applies the second piezoelectric element 32 to suppress the above-described vibration attenuation of the panel 10. The applied voltage may be ± 15V. Therefore, the user can hear the sound by bringing his / her ear into contact with an area away from the above-described panel 10 mounting area.

  Furthermore, in this embodiment, when the control unit 50 executes (acts) a call function, the user of the electronic device 1 can make a call with a user such as another electronic device. When a communication function is executed in the electronic device 1, a communication unit 95 described later performs communication with a base station or another communication device by wire or wireless. At this time, in the electronic device 1, each functional unit related to communication, such as the second piezoelectric element that outputs sound and the microphone 90, is appropriately used. In addition, the control unit 50 can detect that the electronic device 1 is executing a call function. Here, various modes in which the control unit 50 detects the execution of the call function can be assumed. Typically, for example, the control unit 50 can detect that a call function is being executed (activated) when an application for making a call is being executed (activated). Alternatively, when detecting that the control unit 50 is driving the second piezoelectric element 32 for transmitting sound during a call, the control unit 50 can detect the execution of the call function. Furthermore, when a voice of a user or the like is detected by the microphone 90 during a call, the control unit 50 may detect the execution of the call function.

  The proximity sensor 80 detects that an object such as a user's ear has approached the panel 10 up to a predetermined distance, and various sensors can be employed. Here, the predetermined distance includes, for example, a state in which an object such as a user's ear is in contact with the proximity sensor 80 (that is, the distance is zero) by vibration of the second piezoelectric element for outputting sound. It is preferable that the distance be short enough to sufficiently transmit sound to the ear of the person. The proximity sensor 80 is an optical sensor, for example, so that when the user's ear or the like approaches the panel 10 and the light is blocked, the object such as the user's ear approaches the panel 10 to a predetermined distance. Can be detected. Further, the proximity sensor 80 detects, for example, that an object such as a user's ear has approached the panel 10 up to a predetermined distance when a predetermined condition is satisfied by using, for example, an acceleration sensor or a three-axis sensor. You can also. The result detected by the proximity sensor 80 in this way is sent to the control unit 50 as an electrical signal.

  Hereinafter, the proximity sensor 80 will be described as a sensor installed separately from the other functional units. However, when the other functional units also serve as the functional units of the proximity sensor 80, the proximity sensor 80 is independently provided. There is no need to install it. For example, when the panel 10 can detect that an object such as a user's ear has touched the panel 10, the panel 10 can also function as the proximity sensor 80. In addition, for example, when a piezoelectric element such as the first piezoelectric element 31 can detect a pressure on the panel 10 by an object such as a user's ear, the piezoelectric element can also function as the proximity sensor 80.

  The microphone 90 collects ambient sounds such as a user's speech. The sound collected by the microphone 90 is sent to the control unit 50 as an electrical signal.

  When the electronic device 1 is a communication device, the communication unit 95 enables communication with a base station or another communication device by wire or wireless. When the electronic device 1 communicates with a base station or another communication device wirelessly, the communication unit 95 includes the communication antenna.

  FIG. 2 is a diagram illustrating an example of a mounting structure of the electronic device 1 according to the first embodiment. 2A is a front view, and FIG. 2B is a cross-sectional view taken along the line CC in FIG. 3A.

  The electronic device 1 shown in FIG. 2 is a smartphone in which a touch panel, which is a glass plate, is arranged as a panel 10 on the front surface of a housing 60 (for example, a metal or resin case). Panel 10 and input unit 40 are supported by housing 60. In addition, the display unit 20, the first piezoelectric element 31, and the second piezoelectric element 32 are bonded to the panel 10 via bonding members 70. In the example shown in FIG. 2A, the first piezoelectric element 31 and the second piezoelectric element 32 are bonded to the back side of the panel. In order to show this, in FIG. 2A, the first piezoelectric element 31 and the second piezoelectric element 32 are indicated by broken lines. The joining member 70 is an adhesive having a thermosetting property or an ultraviolet curable property, a double-sided tape, or the like, and may be, for example, an optical elastic resin that is a colorless and transparent acrylic ultraviolet curable adhesive. The panel 10, the display part 20, the 1st piezoelectric element 31, and the 2nd piezoelectric element 32 are each substantially rectangular shapes.

  Further, as shown in FIG. 2A, the proximity sensor 80 is disposed near the second piezoelectric element 32, and the user's ear or the like is close to the portion where the second piezoelectric element 32 is disposed. It is preferable to be able to detect. However, the position where the proximity sensor 80 is disposed is not limited to the position shown in FIG. 2A as long as it is possible to detect that a part of the user's body is close to the panel 10. Absent. In the example shown in FIG. 2A, the proximity sensor 80 is bonded to the back side of the panel 10. In order to show this, the proximity sensor 80 is indicated by a broken line in FIG.

  Further, the microphone 90 is disposed around a predetermined position on the panel 10, typically around a position facing the second piezoelectric element 32 with reference to the central portion of the panel 10. The microphone 90 itself is preferably installed on the back side of the panel 10, but by making a hole in the panel 10, the microphone 90 can collect the user's voice from the front side of the panel 10. Note that the microphone 90 is not shown in FIG.

  As shown in FIG. 2A, the display unit 20 is disposed approximately at the center of the panel 10 in the short direction. Further, the first piezoelectric element 31 and the second piezoelectric element 32 are separated from the end in the longitudinal direction of the panel 10 by a predetermined distance, and in the vicinity of the end, the first piezoelectric element 31 and the second piezoelectric element 32 are provided. Are arranged so that the longitudinal direction of the panel is along the short side of the panel 10.

  In FIG. 2, the display unit 20, the first piezoelectric element 31, and the second piezoelectric element 32 are shown to be arranged side by side in a direction parallel to the surface on the back side of the panel 10. The arrangement is not limited to the illustrated example. For example, at least one of the first piezoelectric element 31 and the second piezoelectric element 32 can be arranged in parallel to the longitudinal direction of the electronic apparatus 1 (the longitudinal direction in FIG. 2A). In short, in the present embodiment, the first piezoelectric element 31 and the second piezoelectric element 32 can be arbitrarily configured so as to be able to transmit vibration to the panel 10 by being attached to the panel 10.

  2 shows a configuration in which the display unit 20 is bonded to the back side of the panel 10 via the bonding member 70, but the arrangement of the display unit 20 is not limited to the illustrated example. . For example, the display unit 20 can be adhered to the back surface side of the panel 10 without using the joining member 70, or can be disposed inside the housing 60 instead of being adhered to the panel 10. . When the display unit 20 is arranged inside the housing 60, the display unit 20 is arranged and fixed directly inside the housing 60, or is used for a substrate or a display unit arranged inside the housing 60. It can be fixed to a holder or the like. As shown in FIG. 2, when the display unit 20 is arranged on the back side of the panel 10, when a touch panel is configured by the panel 10 and the display unit 20, a free user interface is displayed on the display unit 20, This operation can be detected by the panel 10. In FIG. 2A, the display unit 20 is indicated by a broken line, so that the display unit 20 is adhered to the back side of the panel 10.

  In FIG. 2, elements other than the display unit 20, the first piezoelectric element 31, the second piezoelectric element 32, the input unit 40, and the bonding member 70 are in the space closed by the housing 60 and the panel 10. The illustration is omitted. Therefore, the electronic device 1 can include elements such as the control unit 50 and various substrates or components other than those shown in FIG. In FIG. 2A, an area on the panel 10 where the display by the display unit 20 does not need to be transmitted (that is, an area where the panel 10 and the display unit 20 do not overlap) is an area near the edge of the panel 10. It is preferred to paint or cover with a bezel. In this way, it is possible to prevent the first piezoelectric element 31, the second piezoelectric element 32, and the like from being visible from the outside of the electronic device 1.

  Next, processing performed by the control unit 50 according to the present embodiment will be described.

  In the present embodiment, when the call function of the electronic device 1 is executed, the control unit 50 drives the second piezoelectric element 32 based on a sound signal or the like from another electronic device received by the communication unit 95. Control to output sound. Thereby, in the electronic device 1, the 2nd piezoelectric element can implement | achieve the function which outputs an audio | voice during a telephone call and transmits the said audio | voice to a user. Further, in the electronic apparatus 1 according to the present embodiment, the control unit 50 controls the first piezoelectric element 31 to be driven when the panel 10 detects contact. Thereby, in the electronic device 1, the 1st piezoelectric element can implement | achieve the function which generate | occur | produces a vibration and shows a tactile sensation to a user.

  On the other hand, as described above, when a plurality of piezoelectric elements having different uses are arranged on one panel, the piezoelectric element for presenting tactile sensation is driven when the sound transmitting piezoelectric element is vibrated to output sound. When vibration is generated, noise is generated during a call due to vibration of both piezoelectric elements. Therefore, in the present embodiment, processing as described below is performed under the control of the control unit 50.

  FIG. 3 is a flowchart for explaining processing by the control unit 50 of the electronic device 1 according to the first embodiment.

  When the process according to the present embodiment is started, first, the control unit 50 determines whether or not a trigger for outputting a sound has occurred (step S11). Here, the trigger for outputting a sound is, for example, an instruction to sound a ring tone by a call application when a call is received, or an instruction to output a voice of a call by a call application. Can be assumed. In short, here, the trigger for outputting sound refers to various instructions that cause the panel 10 to vibrate and output sound by driving the second piezoelectric element 32 for sound output in the electronic device 1. be able to.

  When a trigger for outputting a sound is generated in step S11, the control unit 50 controls to output a sound by driving the second piezoelectric element 32 (step S12).

  If the 2nd piezoelectric element is driven in Step S12, control part 50 will judge whether panel 10 has detected contact with a user's finger etc. (Step S13). In addition, when the trigger which outputs a sound has not generate | occur | produced in step S11, the control part 50 does not drive the 2nd piezoelectric element 32 but progresses to step S13.

  When the panel 10 does not detect contact in step S13, the control unit 50 returns to step S11 and continues the process. On the other hand, when the panel 10 detects contact in step S13, the control unit 50 determines whether or not the call function is being executed (step S14).

  If it is determined in step S14 that the telephone call function is not being executed, the control unit 50 drives the first piezoelectric element 31 because a noise problem does not occur even if vibration for presenting a tactile sensation is generated at this time. And control to present a tactile sensation (step S15). That is, when the panel 10 is touched in step S13 and the call function is not being executed in step S14, a tactile sensation is presented based on the touch. Therefore, the user can confirm by touch that the electronic device 1 has correctly detected his / her operation touching the panel 10.

  When the first piezoelectric element is driven in step S15, the control unit 50 preferably performs control based on the contact position detected in step S13 so as to perform a predetermined process associated with the position. (Step S16). Here, the predetermined process is, for example, when the position of the contact detected on the panel 10 in step S13 corresponds to the position where the icon for starting the phone book application is displayed on the display unit 20. It can be set as the process which starts. Further, for example, the predetermined process is that when the position of the contact detected on the panel 10 in step S13 corresponds to the position where the character key is displayed on the display unit 20, the character key is displayed on the display unit 20. The process can be displayed.

  Note that, even when contact with the panel 10 is detected in step S13, if no processing is associated with the detected contact position, the control unit 50 performs the present processing without performing predetermined processing in step S16. It is preferable to end the processing of the embodiment. Here, the case where no processing is associated with the detected contact position means that, for example, the contact position detected in the panel 10 in step S13 is an object such as any icon or key on the display unit 20. The case where it corresponds to the position which is not displayed also can be assumed.

  On the other hand, if it is determined in step S14 that the call function is being executed, the control unit 50 causes the proximity sensor 80 to determine whether an object such as the user's ear has approached the panel 10 to a predetermined distance. Control (step S17). If it determines with the proximity sensor 80 not detecting the proximity | contact of an object in step S17, the control part 50 will drive the 1st piezoelectric element 31 and will control so that tactile sensation will be presented (step S15).

  On the other hand, if it is determined in step S17 that the proximity sensor 80 has detected the proximity of the object, if a vibration for presenting a tactile sensation is generated at this time, a noise problem occurs. Control is performed so as not to drive the piezoelectric element 31 (step S18). That is, if the panel 10 is touched in step S13, the call function is being executed in step S14, and the user's ear is close to the proximity sensor in step S17, the tactile sensation based on the touch is presented. Not. Therefore, in the present embodiment, when the second piezoelectric element is being driven and the sound is being output, the first piezoelectric element that presents a tactile sensation is driven, thereby causing a problem of noise due to vibrations of both piezoelectric elements. Will not occur. Note that after step S18, the control unit 50 preferably performs control so as to perform a predetermined process corresponding to the position based on the position of the contact detected in step S13 without presenting the tactile sensation. Yes (step S16).

  As described above, in the present embodiment, the control unit 50 controls the second piezoelectric element 32 to output sound when the call function is executed, and controls the first piezoelectric element 31 based on the contact with the panel 10. Control to drive. In the present embodiment, the control unit 50 determines whether to drive the first piezoelectric element 31 based on the detection result of the proximity sensor 80 while the call function is being executed.

  In the above-described embodiment, when a plurality (two in the example of FIG. 2) of the first piezoelectric elements 31 are arranged as shown in FIG. The example in which the first piezoelectric element 31 is controlled not to be driven has been described. By controlling in this way, the electronic apparatus 1 according to the present embodiment can substantially prevent noise caused by vibration of these piezoelectric elements even when a plurality of piezoelectric elements having different uses are provided.

  On the other hand, depending on the specifications of the electronic device 1, there may be a situation where the first piezoelectric element is driven to present a tactile sensation even while the second piezoelectric element 32 is driven to output sound. In such a case, in the present embodiment, while the second piezoelectric element 32 is driven to output sound, control is performed so as not to drive a part of the plurality of first piezoelectric elements 31 provided. Thus, noise caused by these piezoelectric elements can be reduced.

  In this case, when the call function is being executed, the control unit 50 uses the first piezoelectric element disposed closest to the second piezoelectric element 32 among the plurality of first piezoelectric elements 31 based on the detection result of the proximity sensor 80. It is preferable to control so as to determine whether or not 31 is driven. For example, when two upper and lower first piezoelectric elements 31 are provided as shown in FIG. 2, the second piezoelectric element 32 of the two first piezoelectric elements 31 is driven while the second piezoelectric element 32 is driven. It can be controlled not to drive the first piezoelectric element 31 on the upper side.

  Even in this case, as described above, when contact with the panel 10 is detected in step S13, if no processing is associated with the detected contact position, the predetermined processing is not performed in step S16. You can also

  For example, when a tactile sensation presentation piezoelectric element is driven and a tactile sensation is presented while a sound transmitting piezoelectric element is driven to generate sound, the tactile sensation presentation piezoelectric element also vibrates the panel. The vibration is superimposed as noise on the air conduction sound or vibration sound. When such an electronic device is a communication device, a microphone is usually installed. For this reason, in such an electronic device, when a piezoelectric element is driven to generate a sound and a tactile sensation is presented by driving another piezoelectric element, the microphone uses the vibration associated with the tactile sensation as noise. Sound is collected. Furthermore, when the sound is generated by driving the piezoelectric element for sound transmission, when a user listens to the sound by touching the part where sound is output such as the panel of the electronic device. There is. In this way, when the user is listening to the sound with his / her ear abutting against the panel of the electronic device, if vibration related to the presentation of tactile sensation occurs, the user may be surprised or cause discomfort for the user. It is also assumed. However, according to the electronic device 1 according to the present embodiment, such inconvenience can be solved.

(Second Embodiment)
Next, an electronic apparatus according to a second embodiment of the invention will be described. The electronic device 2 according to the second embodiment changes the control by the control unit 50 in the electronic device 1 according to the first embodiment. Therefore, the second embodiment of the present invention can be basically implemented by an electronic device having the same configuration as the electronic device 1 described in the first embodiment. For this reason, the description which becomes the same as 1st Embodiment is abbreviate | omitted.

  In the first embodiment, when contact with the panel 10 is detected, it is necessary to drive the first piezoelectric element 31 while the call function is being executed and the object is in proximity to the proximity sensor 80. Accordingly, control was performed so as to perform a predetermined process. In the second embodiment, the first piezoelectric element 31 is in a state where the call function is being executed and an object is in proximity to the proximity sensor 80 after the user presses the panel 10 while the contact with the panel 10 is detected. Control is performed so as to perform predetermined processing as needed without driving the.

  In order to realize such control, in the present embodiment, the first piezoelectric element 31 attached to the panel 10 detects a pressure on the panel 10. Generally, a piezoelectric element generates a voltage when pressure is applied, and deforms when a voltage is applied. Therefore, the first piezoelectric element 31 may serve as both a functional unit (tactile sensation providing unit) that presents a tactile sensation by generating vibration and a functional unit (press detection unit) that detects a pressure on the panel 10. it can.

  Such a pressure detection unit detects a pressure on the touch surface of the panel 10, and for example, a strain gauge sensor or a piezoelectric that changes physical or electrical characteristics (strain, resistance, voltage, etc.) according to the pressure. An arbitrary number of elements can be used.

  For example, when the pressure detection unit is configured using a piezoelectric element or the like, the piezoelectric element of the pressure detection unit changes the magnitude of the load (force) related to the pressure on the panel 10 (or the magnitude of the load (force) changes. The voltage magnitude (voltage value), which is an electrical characteristic, changes according to the speed (acceleration)). In this case, the pressure detection unit can notify the control unit 50 of the magnitude of the voltage (voltage value (hereinafter simply referred to as data)). The control unit 50 acquires the data when the press detection unit notifies the control unit 50 of the data, or when the control unit 50 detects data related to the piezoelectric element of the press detection unit. That is, the control unit 50 acquires data based on the pressure on the panel 10. That is, the control unit 50 acquires data based on the pressure from the pressure detection unit. Then, the control unit 50 can determine that the operation intended by the user has been performed when the data based on the press satisfies a predetermined standard, and can generate a predetermined vibration. Here, the predetermined reference can be set as appropriate according to the load characteristic when the push button switch is to be expressed. Further, the time when the data based on the pressure satisfies the predetermined standard may be the time when the voltage value (data) reaches the predetermined standard value, or the voltage value (data) exceeds the predetermined standard value. Or a voltage value (data) equal to a predetermined reference value may be detected.

  Also in the second embodiment, the control unit 50 controls to output sound by driving the second piezoelectric element 32. Thereby, in the electronic device 1, the 2nd piezoelectric element is the same as that of 1st Embodiment about the point which can implement | achieve the function which outputs an audio | voice and transmits the said audio | voice to a user.

  On the other hand, in the second embodiment, the control unit 50 drives the first piezoelectric element 31 when the data based on the pressure detected by the first piezoelectric element 31 satisfies a predetermined standard while the panel 10 detects contact. Then, control is performed so as to perform predetermined processing as necessary. Thereby, in the electronic device 1, the 1st piezoelectric element 31 can implement | achieve the function which generate | occur | produces a vibration in the state which the user's press was added to the element, and presents a tactile sensation to a user. For this reason, in the second embodiment, the frequency, amplitude, strength, and the like when the first piezoelectric element 31 generates vibration are appropriately adjusted so that the mechanical key can be obtained when the key is actually pressed. A realistic touch can be presented.

  Next, processing performed by the control unit 50 according to the present embodiment will be described. FIG. 4 is a flowchart for explaining processing by the control unit 50 of the electronic device 2 according to the second embodiment.

  As shown in FIG. 4, the process performed by the control unit 50 in the second embodiment inserts step S21 between step S13 and step S14 in the process according to the first embodiment described in FIG. is there. In the second embodiment, when contact with the panel 10 is detected in step S13, the control unit 50 determines that the data based on the pressure on the panel 10 detected by the first piezoelectric element 31 (the pressure detection unit) is the predetermined value described above. It is determined whether or not the above criteria are satisfied (step S21).

  If the data based on the pressure on the panel 10 does not satisfy the predetermined standard in step S21, the control unit 50 returns to step S13 and continues the process. On the other hand, when the data based on the pressure on the panel 10 satisfies a predetermined standard in step S21, the control unit 50 determines whether or not the call function is being executed (step S14). Step S14 and subsequent steps are the same as the processing according to the first embodiment described in FIG. That is, when the call function is not being executed, or when the call function is being executed but the proximity sensor 80 has not detected the proximity of the object, the control unit 50 drives the first piezoelectric element 31 to present a tactile sensation. Then, control is performed so as to perform predetermined processing. On the other hand, when the call function is being executed and the proximity sensor 80 detects the proximity of an object, the control unit 50 performs control so as to perform a predetermined process without driving the first piezoelectric element 31.

  As described above, in the present embodiment, the control unit 50 performs control so as to determine whether to drive the first piezoelectric element 31 based on the detection result of the proximity sensor 80 while the call function is being executed. To do. Therefore, the electronic device 2 according to the present embodiment can substantially prevent the problem of noise due to vibration of these piezoelectric elements even when a plurality of piezoelectric elements having different uses are arranged. Further, according to the present embodiment, the first piezoelectric element is driven and presents a tactile sensation while the user presses the panel 10 to some extent, so that it is realistic as obtained when the mechanical key is actually pressed. A tactile sensation is presented. Furthermore, according to the present embodiment, the predetermined process is not performed only when a light contact is detected on the panel 10, and the predetermined process is performed when a pressure based on the user's intention is given. It is also possible to prevent a predetermined process from starting based on an operation that is not performed.

  In the present embodiment, as described in the first embodiment, when contact with the panel 10 is detected in step S13, if no processing is associated with the detected contact position, It is possible not to perform the predetermined processing in S16. Also in the present embodiment, as described in the first embodiment, while the second piezoelectric element 32 is driven to output a sound, a part of the plurality of first piezoelectric elements 31 arranged is used. By controlling not to drive, the interference by these piezoelectric elements can be reduced.

  In the second embodiment described above, the configuration in which the first piezoelectric element 31 serves as both a tactile sensation providing unit and a press detection unit has been described. However, the first piezoelectric element 31 may be configured to provide a tactile sensation and provide a pressure detection unit that is separate from the first piezoelectric element 31. In this case, when the panel 10 detects contact in step S13 and the data based on the pressure detected by the pressure detection unit in step S14 satisfies a predetermined standard, the control unit 50 proceeds to step S14 and performs processing. To continue.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, functions included in each component can be rearranged so as not to be logically contradictory, and a plurality of components can be combined into one or divided.

  For example, in each of the above-described embodiments, control is performed so that the first piezoelectric element does not exhibit a tactile sensation while the second piezoelectric element outputs sound. However, conversely, even if control is performed so that the second piezoelectric element does not output sound while the first piezoelectric element presents a tactile sensation, the problem of noise caused by vibration of both piezoelectric elements can be similarly reduced. Can do. That is, in the present invention, the control unit 50 drives one of the second piezoelectric element 32 and the first piezoelectric element 31 when the call function is being executed and the proximity sensor 80 detects the proximity of an object. During the operation, the other piezoelectric element can be controlled not to be driven. For example, when the call function is being executed and the proximity sensor 80 detects the proximity of an object, the control unit 50 does not drive the second piezoelectric element 32 while driving the first piezoelectric element 31. It can also be controlled as follows.

  For example, in each embodiment mentioned above, the aspect which displays an object on the display part 20 arrange | positioned at the back surface side of the panel and the panel 10 detects a user's contact was demonstrated. However, the present invention is not limited to such an aspect, and can be applied to an aspect in which an object is directly printed on the panel 10 with ink or the like without having the display unit 20, for example. .

  Moreover, in the said embodiment, the case where the contact with respect to the said panel 10 was detected using the panel 10 was demonstrated. That is, in the above embodiment, the panel 10 has been described assuming a member such as a so-called touch sensor. However, the touch panel used in the electronic device according to the present invention may be any as long as it can be touched by a contact object such as a user's finger or a stylus pen.

  For example, the panel used for the electronic apparatus according to the present invention can be a member that does not detect the position of contact of the contact object with the panel (that is, does not have a sensing function). In the electronic device having such a configuration, for example, it is possible to determine that contact with the panel has been made based on the pressure detected by the pressure detection unit by further providing a pressure detection unit that detects pressure on the panel. it can.

  Further, the electronic device 1 described above can transmit air conduction sound and vibration sound transmitted through a part of the user's body (for example, cartilage of the outer ear) to the user by the vibration of the panel 10. . Therefore, when outputting a sound having a volume equivalent to that of a conventional dynamic receiver, the sound transmitted to the periphery of the electronic device 1 due to the vibration of the air due to the vibration of the panel 10 is less than that of the dynamic receiver. Therefore, it is suitable, for example, when listening to a recorded message on a train or the like.

  In addition, since the electronic device 1 described above transmits vibration sound by vibration of the panel 10, even if the user wears an earphone or a headphone, for example, by bringing the electronic device 1 into contact with the user, the user can Sounds can be heard through headphones and body parts.

  The electronic device 1 described above transmits sound to the user by the vibration of the panel 10. Therefore, when the electronic device 1 does not include a separate dynamic receiver, it is not necessary to form an opening (sound emission port) for sound transmission in the housing 60, and the waterproof structure of the electronic device 1 can be simplified. In addition, when the electronic device 1 is provided with a dynamic receiver, the sound emission port is preferably closed by a member that allows gas to pass but not liquid. An example of the member that allows gas to pass but not liquid is Gore-Tex (registered trademark).

  In the first embodiment described above, when contact with the panel 10 is detected, if the call function is being executed and a predetermined object is approaching the proximity sensor 80, the first piezoelectric element 31 is driven. Without performing the predetermined processing. However, the present invention is not limited to this, and the electronic device has a call function regardless of whether or not the proximity sensor 80 detects the proximity of a predetermined object when contact with the panel 10 is detected. During execution, the first piezoelectric element 31 may not be driven and a predetermined process may be performed.

  In the first embodiment described above, when the data based on the pressure on the panel 10 satisfies a predetermined standard, if the call function is being executed and a predetermined object is in proximity to the proximity sensor 80, 1 The piezoelectric element 31 was not driven and a predetermined process was performed. However, the present invention is not limited to this, and the electronic device determines whether or not the proximity sensor 80 detects the proximity of a predetermined object when the data based on the pressure on the panel 10 satisfies the predetermined standard. Regardless, if the call function is being executed, the first piezoelectric element 31 may not be driven and a predetermined process may be performed.

DESCRIPTION OF SYMBOLS 1 Electronic device 10 Panel 20 Display part 31 1st piezoelectric element 32 2nd piezoelectric element 40 Input part 50 Control part 60 Case 70 Joining member 80 Proximity sensor 90 Microphone 95 Communication part

Claims (2)

A touch panel provided with a first piezoelectric element and a second piezoelectric element;
The first piezoelectric element is driven based on the touch on the touch panel, and the control is performed according to the position of the touch on the touch panel, and the second piezoelectric element is driven during the call function to generate sound. A control unit that outputs a control unit,
A proximity sensor that detects that an object has approached the touch panel ,
When the control unit detects that an object is close to the touch panel during execution of the call function, the control unit performs a process according to the position of the touch on the touch panel without driving the first piezoelectric element. Electronic equipment characterized by performing. The first piezoelectric element is arranged such that the long side of the first piezoelectric element is along one side of the touch panel, and the second piezoelectric element is such that the long side of the second piezoelectric element is along the one side. The electronic apparatus according to claim 1, wherein the electronic apparatus is disposed outside the first piezoelectric element with a central portion of the touch panel as a reference.

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