JP2013236139A - Electronic apparatus, control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the quality of sounds transmitted to a user by an easy operation.SOLUTION: An electronic apparatus (portable phones 1A to 1C) includes: a piezoelectric element 7; a panel 20 that is vibrated by the piezoelectric element 7 and generates air conduction sounds and vibration sounds transmitted by vibrating a part of a human body; and a touch screen 21 detecting the contact of the part of the human body with the panel 20. The sound quality of the vibration sounds is changed according to a detection result of the touch screen 21.

Description

  The present application relates to an electronic device, a control method, and a control program.

  Patent Document 1 describes an electronic device that transmits air conduction sound and vibration sound to a user. Patent Document 1 describes that when a voltage is applied to a piezoelectric element of a vibrating body arranged on the outer surface of a housing of an electronic device, the vibrating body flexes and vibrates due to expansion and contraction of the piezoelectric element. Further, Patent Document 1 describes that when a user brings a vibrating body that flexes and vibrates into contact with the auricle, air conduction sound and vibration sound are transmitted to the user. According to Patent Document 1, air conduction sound is sound that is transmitted to the eardrum through the ear canal through the vibration of the air due to the vibration of the object, and is transmitted to the user's auditory nerve by the vibration of the eardrum. According to Patent Document 1, the vibration sound is a sound transmitted to the user's auditory nerve through a part of the user's body (for example, cartilage of the outer ear) that contacts the vibrating object.

JP 2005-348193 A

  Incidentally, in general, there is a need for an electronic device to change the quality of sound transmitted to a user with a simple operation.

  An electronic apparatus according to one aspect includes a piezoelectric element, a sound generation unit that generates vibration sound that is vibrated by the piezoelectric element, vibrates a part of a human body, and is transmitted to the sound generation unit. A detection unit that detects a partial contact of the human body, and the quality of the vibration sound changes according to a detection result of the detection unit.

  A control method according to one aspect is a control method executed by an electronic device including a sound generation unit and a piezoelectric element, wherein the sound generation unit is vibrated by the piezoelectric element, and air conduction sound and human body The detection result of the detecting step includes: generating a vibration sound transmitted by vibrating a part of the sound generating unit; and detecting a partial contact of the human body with the sound generating unit. Accordingly, the sound quality of the vibration sound changes.

  A control program according to one aspect is an electronic device including a sound generating unit and a piezoelectric element, wherein the sound generating unit is vibrated by the piezoelectric element, and air conduction sound and vibration transmitted through a part of a human body are transmitted. Generating a sound at the sound generating unit, detecting a contact of a part of the human body with the sound generating unit, and executing the sound, and the sound quality of the vibration sound is determined according to a detection result of the detecting step. Change.

FIG. 1 is a front view of a mobile phone according to an embodiment. FIG. 2 is a cross-sectional view of the mobile phone according to the embodiment. FIG. 3 is a diagram showing an example of the shape of the panel. FIG. 4 is a diagram showing an example of panel vibration. FIG. 5 is a block diagram of the mobile phone according to the embodiment. FIG. 6A is a diagram for describing detection of an ear position. FIG. 6B is a diagram for explaining detection of an ear position. FIG. 6C is a diagram for describing detection of an ear position. FIG. 7A is a diagram for describing control for changing sound quality. FIG. 7B is a diagram for describing control for changing sound quality. FIG. 7C is a diagram for describing control for changing sound quality. FIG. 8A is a diagram illustrating an example of changing the sound quality. FIG. 8B is a diagram illustrating an example of changing the sound quality. FIG. 8C is a diagram illustrating an example of changing the sound quality. FIG. 9A is a flowchart showing a control processing procedure for changing the sound quality. FIG. 9B is a flowchart illustrating a processing procedure of control for changing sound quality. FIG. 9C is a flowchart showing a control processing procedure for changing the sound quality. FIG. 10A is a diagram illustrating an example of changing the first set value. FIG. 10B is a diagram illustrating an example of changing the second setting value. FIG. 10C is a diagram illustrating an example of changing the third setting value. FIG. 11 is a flowchart showing a control processing procedure for changing various setting values for determining sound quality. FIG. 12 is a front view of a mobile phone according to another embodiment. FIG. 13 is a cross-sectional view of a mobile phone according to another embodiment. FIG. 14 is a diagram for explaining detection of an ear position. FIG. 15 is a front view of a mobile phone according to another embodiment. FIG. 16 is a cross-sectional view of a mobile phone according to another embodiment. FIG. 17 is a diagram illustrating an example of the resonance frequency of the panel. FIG. 18 is a diagram for explaining detection of an ear position.

  Embodiments for carrying out the present invention will be described in detail with reference to the drawings. Hereinafter, a mobile phone will be described as an example of an electronic device that transmits air conduction sound and vibration sound to a user.

(Embodiment 1)
With reference to FIGS. 1 and 2, the overall configuration of the mobile phone 1 </ b> A according to the embodiment will be described. FIG. 1 is a front view of the mobile phone 1A. FIG. 2 is a cross-sectional view schematically showing an aa cross section of the mobile phone 1A. As shown in FIGS. 1 and 2, the mobile phone 1A includes a display 2, a button 3, an illuminance sensor 4, a proximity sensor 5, a piezoelectric element 7, a microphone 8, a camera 12, a panel 20, And a housing 40.

  The display 2 is a liquid crystal display (LCD: Liquid Crystal Display), an organic EL display (OELD: Organic Electro-Luminescence Display), or an inorganic EL display (IELD: Inorganic Electro-Luminescence Display). The display 2 displays characters, images, symbols, graphics, and the like.

  The button 3 receives an operation input from the user. The number of buttons 3 is not limited to the example shown in FIGS.

  The illuminance sensor 4 detects the illuminance of ambient light of the mobile phone 1A. Illuminance indicates light intensity, brightness, or luminance. The illuminance sensor 4 is used for adjusting the luminance of the display 2, for example. The proximity sensor 5 detects the presence of a nearby object without contact. The proximity sensor 5 detects the presence of an object based on a change in a magnetic field or a change in a feedback time of an ultrasonic reflected wave. For example, the proximity sensor 5 detects that the display 2 is brought close to the face. The illuminance sensor 4 and the proximity sensor 5 may be configured as one sensor. The illuminance sensor 4 may be used as a proximity sensor.

  When an electric signal (voltage corresponding to a sound signal) is applied, the piezoelectric element 7 expands or contracts or bends according to the electromechanical coupling coefficient of the constituent material. That is, the piezoelectric element 7 is deformed when an electric signal is applied. The piezoelectric element 7 is attached to the panel 20 and used as a vibration source for vibrating the panel 20. The piezoelectric element 7 is formed using, for example, ceramic or quartz. The piezoelectric element 7 may be a unimorph, bimorph, or multilayer piezoelectric element. The multilayer piezoelectric element includes a multilayer bimorph element in which bimorphs are stacked (for example, 16 layers or 24 layers are stacked). The multilayer piezoelectric element is composed of, for example, a multilayer structure including a plurality of dielectric layers made of PZT (lead zirconate titanate) and electrode layers disposed between the plurality of dielectric layers. A unimorph expands and contracts when an electrical signal (voltage) is applied. A bimorph bends when an electrical signal (voltage) is applied.

  The microphone 8 is a sound input unit. The microphone 8 converts the input sound into an electric signal. The speaker 11 is a sound output unit that outputs sound by an air conduction method. The speaker 11 is a dynamic speaker, for example, and can transmit a sound obtained by converting an electric signal to a person whose ear is not in contact with the mobile phone 1A. The speaker 11 is used for outputting music, for example.

  The camera 12 is an in camera that captures an object facing the display 2. The camera 12 converts the captured image into an electrical signal. In addition to the camera 12, the mobile phone 1 </ b> A may include an out camera that captures an object facing the surface on the opposite side of the display 2.

  The panel 20 vibrates as the piezoelectric element 7 is deformed (stretched or bent), and transmits the vibration to the ear cartilage (auricular cartilage) or the like that the user contacts with the panel 20. The panel 20 also has a function of protecting the display 2 and the piezoelectric element 7 from external force. The panel 20 is formed by synthetic resins, such as glass or an acryl, for example. The shape of the panel 20 is, for example, a plate shape. The panel 20 may be a flat plate. The panel 20 may be a curved panel whose surface is smoothly curved.

  The display 2 and the piezoelectric element 7 are attached to the back surface of the panel 20 by a joining member 30. The piezoelectric element 7 is spaced from the inner surface of the housing 40 by a predetermined distance while being arranged on the back surface of the panel 20. The piezoelectric element 7 may be separated from the inner surface of the housing 60 even in a stretched or bent state. That is, the distance between the piezoelectric element 7 and the inner surface of the housing 40 is preferably larger than the maximum deformation amount of the piezoelectric element 7. The piezoelectric element 7 may be attached to the panel 20 via a reinforcing member (for example, sheet metal or glass fiber reinforced resin). The joining member 30 is, for example, a double-sided tape or an adhesive having thermosetting property or ultraviolet curable property. The joining member 30 may be an optical elastic resin that is a colorless and transparent acrylic ultraviolet curable adhesive.

  The display 2 is disposed approximately in the center of the panel 20 in the short direction. The piezoelectric element 7 is disposed in the vicinity of a predetermined distance from the longitudinal end of the panel 20 so that the longitudinal direction of the piezoelectric element 7 is parallel to the lateral direction of the panel 20. The display 2 and the piezoelectric element 7 are arranged in parallel on the inner surface of the panel 20.

  A touch screen (touch sensor) 21 is disposed on almost the entire outer surface of the panel 20. The touch screen 21 detects contact with the panel 20. The touch screen 21 is used to detect a user's contact operation with a finger, pen, stylus pen, or the like. The gestures detected using the touch screen 21 include, but are not limited to, touch, long touch, release, swipe, tap, double tap, long tap, drag, flick, pinch in, and pinch out. The detection method of the touch screen 21 may be any method such as a capacitance method, a resistive film method, a surface acoustic wave method (or an ultrasonic method), an infrared method, an electromagnetic induction method, and a load detection method.

  The touch screen 21 is also used to detect an object such as an auricular cartilage that contacts the panel 20 in order to hear sound. The touch screen 21 is also used to detect pressure on the panel 20 by an object such as auricular cartilage that contacts the panel 20.

  The housing 40 is formed using resin or metal. The housing 40 supports the button 3, the illuminance sensor 4, the proximity sensor 5, the microphone 8, the speaker 11, the camera 12, the panel 20, and the like.

  The sound output by the mobile phone 1A according to the embodiment will be described in more detail with reference to FIGS. FIG. 3 is a diagram illustrating an example of the shape of the panel 20. FIG. 4 is a diagram illustrating an example of the vibration of the panel 20.

  An electric signal corresponding to the output sound is applied to the piezoelectric element 7. For example, ± 15 V higher than ± 5 V, which is an applied voltage of a so-called panel speaker that transmits sound by air conduction sound through the ear canal, may be applied to the piezoelectric element 7. Thereby, even when the user presses a part of his / her body against the panel 20 with a force of 3N or more (5N to 10N force), for example, the panel 20 generates sufficient vibration and is used. Vibration sound transmitted through a part of the person's body can be generated. The voltage applied to the piezoelectric element 7 can be appropriately adjusted according to the fixing strength of the panel 20 with respect to the housing 40 or the performance of the piezoelectric element 7.

  When an electric signal is applied, the piezoelectric element 7 expands or contracts in the longitudinal direction. The panel 20 to which the piezoelectric element 7 is attached is deformed in accordance with expansion / contraction or bending of the piezoelectric element 7. Thereby, the panel 20 vibrates and generates air conduction sound. Further, when the user brings a part of the body (for example, auricular cartilage) into contact with the panel 20, the panel 20 generates vibration sound that is transmitted to the user through the part of the body. That is, as the piezoelectric element 7 is deformed, the panel 20 vibrates at a frequency that is perceived as vibration sound with respect to an object that contacts the panel 20.

  For example, when an electric signal corresponding to the voice of the other party of the call or sound data such as a ring tone or music is applied to the piezoelectric element 7, the panel 20 generates air conduction sound and vibration sound corresponding to the electric signal. Let The sound signal output via the piezoelectric element 7 and the panel 20 may be based on sound data stored in the storage 9 described later. The sound signal output via the piezoelectric element 7 and the panel 20 may be based on sound data stored in an external server or the like and acquired via the network by the communication unit 6 described later.

  In the present embodiment, the panel 20 may be approximately the same size as the user's ear. Moreover, the panel 20 may be larger in size than the user's ear, as shown in FIG. In this case, the user can bring the entire outer periphery of the ear into contact with the panel 20 when listening to the sound. Listening to the sound in this way makes it difficult for ambient sounds (noise) to enter the ear canal. In the present embodiment, at least the panel 20 has a length in the longitudinal direction (or short direction) corresponding to the distance between the lower leg of the anti-annulus (lower anti-annular leg) and the anti-tragus, and the pair of the panel 20 from the tragus. A region wider than a region having a length in the short direction (or the longitudinal direction) corresponding to the distance to the ear ring vibrates. The panel 20 has a length in the longitudinal direction (or short direction) corresponding to the distance from the region near the upper leg of the ear ring (upper pair leg) in the ear ring to the earlobe, and the vicinity of the ear ring in the ear ring from the tragus. A region having a length in the short direction (or the longitudinal direction) corresponding to the distance to the part may vibrate. The region having the above length and width may be a rectangular region, or an elliptical shape in which the length in the longitudinal direction is the major axis and the length in the lateral direction is the minor axis. Also good. The average size of the human ear can be known, for example, by referring to the Japanese human body size database (1992-1994) created by the Human Life Engineering Research Center (HQL).

  As shown in FIG. 4, the panel 20 vibrates not only in the attachment region 20a to which the piezoelectric element 7 is attached, but also in a region away from the attachment region 20a. The panel 20 has a plurality of locations that vibrate in a direction intersecting the main surface of the panel 20 in the vibrating region, and in each of the plurality of locations, the value of the amplitude of vibration changes from positive to negative with time, Or vice versa. At each moment, the panel 20 vibrates at a seemingly random or regular distribution in a substantially entire portion of the panel 20 with a portion having a relatively large vibration amplitude and a portion having a relatively small vibration amplitude. That is, vibrations of a plurality of waves are detected over the entire panel 20. If the voltage applied to the piezoelectric element 7 is ± 15 V as described above, even if the user presses the panel 20 against his / her body with a force of 5N to 10N, for example, The vibrations that occur are difficult to attenuate. For this reason, even if a user makes an ear contact the area | region away from the attachment area | region 20a on the panel 20, he can hear a vibration sound.

  In the present embodiment, the display 2 is attached to the panel 20. For this reason, the lower part of the panel 20 (the side on which the display 2 is attached) is increased in rigidity, and the vibration is smaller than the upper part of the panel 20 (the side on which the piezoelectric element 7 is attached). For this reason, the sound leakage of the air conduction sound due to the vibration of the panel 20 in the lower part of the panel 20 is reduced.

  The cellular phone 1 </ b> A can transmit air conduction sound and vibration sound via a part of the user's body (for example, auricular cartilage) to the user by the vibration of the panel 20. Therefore, when the mobile phone 1A outputs a sound having a volume equivalent to that of the dynamic receiver, the sound transmitted to the surroundings of the mobile phone 1A due to air vibration may be reduced compared to an electronic device having only a dynamic speaker. it can. Such a feature is suitable, for example, when listening to a recorded message in a place where there is another person nearby, such as in a train.

  Furthermore, the mobile phone 1 </ b> A transmits a vibration sound to the user by the vibration of the panel 20. Therefore, even if the user wears the earphone or the headphone, the user can hear the vibration sound due to the vibration of the panel 20 through the earphone or the headphone and a part of the body by bringing the mobile phone 1A into contact therewith. it can.

  Furthermore, the mobile phone 1 </ b> A transmits sound by the vibration of the panel 20. Therefore, when the mobile phone 1A does not include a separate dynamic receiver, there is no need to form an opening (sound outlet) in the housing 40 for transmitting the sound generated by the panel 20 to the outside. For this reason, when realizing a waterproof structure, the structure can be simplified. When it is necessary to form an opening such as a sound outlet of a dynamic speaker in the housing 40, the cellular phone 1A closes the opening with a member that allows gas to pass but not liquid to realize a waterproof structure. A structure may be adopted. An example of the member that allows gas to pass but not liquid is Gore-Tex (registered trademark).

  A functional configuration of the mobile phone 1A will be described with reference to FIG. FIG. 5 is a block diagram of the mobile phone 1A. As shown in FIG. 5, the mobile phone 1A includes a display 2, a button 3, an illuminance sensor 4, a proximity sensor 5, a communication unit 6, a piezoelectric element 7, a microphone 8, a storage 9, and a controller 10. A speaker 11, a camera 12, a posture detection unit 15, a vibrator 18, and a touch screen 21.

  The communication unit 6 communicates wirelessly. The communication method supported by the communication unit 6 is a wireless communication standard. Examples of wireless communication standards include cellular phone communication standards such as 2G, 3G, and 4G. As cellular phone communication standards, for example, LTE (Long Term Evolution), W-CDMA (Wideband Code Multiple Access), CDMA2000, PDC (Personal Digital Cellular, GSM (registered trademark) mmloS). (Personal Handy-phone System). As wireless communication standards, for example, there are WiMAX (Worldwide Interoperability for Microwave Access), IEEE802.11, Bluetooth (registered trademark), IrDA (Infrared Data Association), NFC (NearCo), etc. The communication unit 6 may support one or more of the communication standards described above.

  The storage 9 stores programs and data. The storage 9 is also used as a work area for temporarily storing the processing result of the controller 10. The storage 9 may include any non-transitory storage medium such as a semiconductor storage medium and a magnetic storage medium. The storage 9 may include a plurality of types of storage media. The storage 9 may include a combination of a portable storage medium such as a memory card, an optical disk, or a magneto-optical disk and a storage medium reader. The storage 9 may include a storage device used as a temporary storage area such as a RAM (Random Access Memory).

  The programs stored in the storage 9 include an application executed in the foreground or the background and a control program that supports the operation of the application. For example, the application displays a screen on the display 2 and causes the controller 10 to execute processing according to the gesture detected by the touch screen 21. The control program is, for example, an OS. The application and the control program may be installed in the storage 9 via wireless communication by the communication unit 6 or a non-transitory storage medium.

  The storage 9 stores, for example, a control program 9A, a call application 9B, a music playback application 9C, a moving image playback application 9D, and setting data 9Z. The call application 9B provides a call function for a call by wireless communication. The music playback application 9C provides a music playback function for playing back sound from music data. The video playback application 9D provides a video playback function for playing back video and sound from video data. The setting data 9Z includes information related to various settings related to the operation of the mobile phone 1A.

  The control program 9A provides functions related to various controls for operating the mobile phone 1A. For example, the control program 9A determines a user's operation based on the contact detected by the touch screen 21, and starts a program corresponding to the determined operation. The function provided by the control program 9A includes a function for performing control for changing the sound quality according to the position of the ear in contact with the panel 20, and a control for changing the sound quality according to the pressure on the panel 20 of the contacting ear. And a function for performing control for changing various setting values for determining sound quality according to the position and pressing of the ear. The function provided by the control program 9A may be used in combination with a function provided by another program such as the call application 9B.

  The controller 10 is an arithmetic processing device. The arithmetic processing unit includes, for example, a CPU (Central Processing Unit), an SoC (System-on-a-chip), an MCU (Micro Control Unit), and an FPGA (Field-Programmable Gate Array), but is not limited thereto. The controller 10 implements various functions by comprehensively controlling the operation of the mobile phone 1A.

  Specifically, the controller 10 executes instructions included in the program stored in the storage 9 while referring to the data stored in the storage 9 as necessary. And the controller 10 controls a function part according to data and a command, and implement | achieves various functions by it. The functional unit includes, for example, the display 2, the communication unit 6, the piezoelectric element 7, the microphone 8, the speaker 11, and the vibrator 18, but is not limited thereto. The controller 10 may change the control according to the detection result of the detection unit. The detection unit includes, for example, the button 3, the illuminance sensor 4, the proximity sensor 5, the camera 12, the posture detection unit 15, and the touch screen 21, but is not limited thereto.

  For example, the controller 10 executes the control program 9A to change the sound quality in accordance with the control for changing the sound quality according to the position of the ear in contact with the panel 20 and the pressure on the panel 20 of the contacted ear. And control for changing various setting values for determining sound quality in accordance with the position and pressing of the ear.

  The posture detection unit 15 detects the posture of the mobile phone 1A. The posture detection unit 15 includes at least one of an acceleration sensor, a direction sensor, and a gyroscope in order to detect the posture. Vibrator 18 vibrates a part or the whole of mobile phone 1A. The vibrator 18 includes, for example, a piezoelectric element or an eccentric motor in order to generate vibration. The vibration generated by the vibrator 18 is used not only to transmit sound but also to notify the user of various events such as incoming calls.

  In FIG. 5, some or all of the programs and data stored in the storage 9 may be downloaded from other devices by wireless communication using the communication unit 6. In FIG. 5, some or all of the programs and data stored in the storage 9 may be stored in a non-transitory storage medium that can be read by the reading device included in the storage 9. Non-transitory storage media include, for example, optical disks such as CD (registered trademark), DVD (registered trademark), and Blu-ray (registered trademark), magneto-optical disks, magnetic storage media, memory cards, and solid-state storage media Including, but not limited to.

  The configuration of the cellular phone 1A shown in FIG. 5 is an example, and may be changed as appropriate without departing from the spirit of the present invention. For example, the mobile phone 1A may include buttons such as a numeric keypad layout or a QWERTY layout as buttons for operations.

  Control for changing the sound quality according to the position of the ear in contact with the panel 20 and control for changing the sound quality according to the pressing of the touching ear panel 20 with reference to FIGS. 6A to 9C explain. 6A to 6C are diagrams for explaining detection of the position of the ear that contacts the panel 20. FIG. 7A to FIG. 7C are diagrams for describing control for changing the sound quality according to the position of the ear in contact with the panel 20 or the pressing of the contacting ear against the panel 20. 8A to 8C are diagrams illustrating examples of changing the sound quality. FIG. 9A to FIG. 9C are flowcharts showing a control processing procedure for changing the sound quality.

  With reference to FIGS. 6A to 6C, detection of the position of the ear that contacts the panel 20 performed by the mobile phone 1 </ b> A will be described.

  The cellular phone 1 </ b> A uses the touch screen 21 to detect the position of the ear that contacts the panel 20. For example, in the mobile phone 1A, as shown in FIG. 6A, a position 72 determined based on an area 71 where an ear contact is detected by the touch screen 21 is referred to as an ear position (hereinafter referred to as “contact position”). Detect as. The position 72 is, for example, the center (center of gravity) of the region 71. The position 72 may be any of the vertices of the smallest rectangle including the area 71. The position 72 may be a position corresponding to a predetermined part of the ear. In this case, the position 72 is calculated from the relative positional relationship with the region 71 based on information on the general position of the part in the ear.

  This method makes it possible to detect the position of the ear in contact with the panel 20 without performing complicated calculations. Furthermore, this method can also be applied when the number of points on which the touch screen 21 can simultaneously detect contact with the panel 20 is small.

  Alternatively, as shown in FIG. 6B, the mobile phone 1A detects the position of the ear by pattern matching between an image 73 obtained based on the detection result of the touch screen 21 when an object is in contact with a specimen 74 prepared in advance. To do. The image 73 is obtained by dividing the detection area of the touch screen 21 into a lattice shape and converting the detection state of the contact of the object in each of the divided areas into the corresponding pixel state. When the value detected by the touch screen 21 in each region varies depending on, for example, the distance between the touch screen 21 and the object, the pressure with which the object presses the touch screen 21, and the like, the image 73 is a multi-tone image. Also good.

  The specimen 74 is an image that should be obtained in the same manner as the image 73 in a region where the ear is in contact with the ear. The sample 74 may be an image that should be obtained when the user of the mobile phone 1A touches the ear, or may be an image that should be obtained when the general human ear touches. A plurality of specimens 74 may be prepared such as a right ear image and a left ear image.

  The specimen 74 includes a reference position 74a corresponding to a predetermined part of the ear (for example, tragus). The reference position 74a is located at (x1, y1) with the upper left of the sample 74 as a reference. The reference position 74a may be set based on information regarding the position of the part in a general human ear. When the specimen 74 is an image actually obtained when the user of the mobile phone 1A touches the ear, the reference position 74a may be set by analyzing the image.

  When the image 73 is obtained, the cellular phone 1A obtains the relative positions of the image 73 and the specimen 74 when they most closely match by pattern matching. When it is determined by pattern matching that the image 73 and the sample 74 do not match (for example, when the matching degree is lower than the threshold value), the mobile phone 1A determines that the contact of the ear is not detected. Also good. When the relative position is obtained, the mobile phone 1A calculates the position of the ear based on the relative position and the reference position 74a. In the case of the example in FIG. 6B, when the sample 74 is shifted by x2 in the X-axis direction and y2 in the Y-axis direction with the upper left of the image 73 as a reference, the two match best. In this case, the position of the ear is calculated as (x1 + x2, y1 + y2).

  This method makes it possible to accurately detect the position of the ear in contact with the panel 20. Furthermore, this method determines whether the object that contacts the panel 20 is an ear or whether the object that contacts the panel 20 is a pre-registered person's ear by matching with a specimen. Enable. Furthermore, this scheme makes it possible to detect detailed information about ear contact, such as ear orientation and tilt.

  When the position of the ear is detected by pattern matching, the sample may not include the reference position. In the example shown in FIG. 6C, the image 73 is pattern-matched with the sample 75 that does not include the reference position. In the case of the example in FIG. 6C, when the sample 75 is shifted by x3 in the X-axis direction and y3 in the Y-axis direction with the upper left of the image 73 as a reference, the two match best. In this case, the position of the ear is calculated as (x3, y3), for example.

  Since this method does not include a reference position, the sample is easily created. For example, if the amount and direction of movement of the ear position are required and it is not necessary to specify the position of a specific part of the ear, the necessary information can be obtained by this method without setting a reference position for the specimen. Can do.

  The method for detecting the position of the ear in contact with the panel 20 using the touch screen 21 is not limited to the above method, and other methods may be adopted.

  In the setting data 9Z, information indicating the position of the ear on the panel 20 that is first detected by any one of the above methods or another method is stored as initial coordinates (X, Y). For example, when the ear position is first detected by the method shown in FIG. 6A, the coordinates corresponding to the position 72 are stored in the setting data 9Z as the initial coordinates (X, Y). When the ear position is first detected by the method shown in FIG. 6B, the coordinates (x1, y1) corresponding to the reference position 74a are stored in the setting data 9Z as the initial coordinates (X, Y). When the ear position is first detected by the method shown in FIG. 6C, the coordinates (x3, y3) are stored in the setting data 9Z as the initial coordinates (X, Y).

  With reference to FIG. 7A to FIG. 8C, control for changing the sound quality performed by the mobile phone 1 </ b> A during a call will be described. In the example shown in FIGS. 7A to 7C, the detection area of the touch screen 21 is divided into a 5 × 5 grid in order to simplify the description.

  In the present embodiment, the mobile phone 1A changes the sound quality by any one of the following three controls. The first control is a control in which the cellular phone 1A changes the sound quality according to the change in the longitudinal direction of the panel 20 at the contact position. This first control will be described below with reference to FIGS. 7A, 8A, and 9A. The second control is a control in which the cellular phone 1A changes the sound quality according to the change in the short direction of the panel 20 at the contact position. This second control will be described below with reference to FIGS. 7B, 8B, and 9B. The third control is a control in which the mobile phone 1A changes the sound quality in accordance with a change in pressure. This third control will be described below with reference to FIGS. 7C, 8C, and 9C.

  With reference to FIG. 7A and FIG. 8A, the 1st control which changes the sound quality which the mobile telephone 1A performs is demonstrated.

  As shown in FIG. 7A, when the touch to the ear panel 20 is detected by the touch screen 21, the mobile phone 1 </ b> A determines the position where the ear is in contact with the panel 20 by any one of the above methods or other methods. Detect by the method. Then, the mobile phone 1A stores the ear position detected first in the setting data 9Z as the initial coordinates (X, Y). Then, in step S10, the mobile phone 1A outputs a default sound (standard sound) when the ear position is at the position of the initial coordinates (X, Y) stored in the setting data 9Z. The default sound is a sound set to a standard sound quality as a reference. In step S10, the voice of the other party “Moshimoshi” is output with standard sound quality.

  In step S12, the cellular phone 1A detects that the position of the ear has moved from the initial coordinates to the position (X, Y + 1) shifted by one lattice from the initial coordinate to the upper side in the longitudinal direction, in step S12. In this case, the cellular phone 1A changes the sound quality to be one step higher than the standard sound quality by controlling the electric signal applied to the piezoelectric element 7 as step S14. For example, as shown in FIG. 8A, in the mobile phone 1A, the contact position on the panel 20 of the ear that contacts the panel 20 is close to the upper end in the longitudinal direction of the panel 20 (for example, the contact position is the initial position). As the coordinates (X, Y) deviate from (X, Y + 1), (X, Y + 2)), the sound quality of the vibration sound transmitted to the ear by the panel 20 increases (for example, the high sound level of the sound quality increases to +5, +10). The electric signal applied to the piezoelectric element 7 is controlled so that the low sound level is lowered to -5 and -10. In step S14, the voice of the other party “Moshimoshi” is output with a higher sound quality.

  In step S16, the cellular phone 1A detects that the position of the ear has moved from the initial coordinates to the lower side in the longitudinal direction of the panel 20 by one grid (X, Y-1) by the touch screen 21. To do. In this case, in step S18, the cellular phone 1A changes the sound quality to be one step lower than the standard sound quality by controlling the electric signal applied to the piezoelectric element 7. As shown in FIG. 8A, in the mobile phone 1A, the contact position on the panel 20 of the ear that contacts the panel 20 is close to the lower end of the longitudinal direction of the panel 20 (for example, the contact position is the initial coordinate). As (X, Y) shifts to (X, Y-1) and (X, Y-2)), the sound quality of the vibration sound transmitted to the ear by the panel 20 decreases (for example, the high sound level of sound quality is -5, The electric signal to be applied to the piezoelectric element 7 is controlled so that the low sound level becomes as low as −10 and the low sound level becomes high as +5 and +10. In step S18, the voice “Moshimoshi” of the other party is output with a sound quality one step lower.

  In the example shown in FIGS. 7A and 8A, the mobile phone 1A changes the sound quality according to the coordinate in the Y-axis direction regardless of the change in the coordinate in the X-axis direction even if the coordinate in the X-axis direction changes. .

  With reference to FIG. 7B and FIG. 8B, the 2nd control which changes the sound quality which 1 A of mobile telephones perform is demonstrated.

  As shown in FIG. 7B, when the touch of the ear panel 20 is detected by the touch screen 21, the mobile phone 1 </ b> A determines the position where the ear is in contact with the panel 20 by any one of the above methods or other Detect by the method. Then, the mobile phone 1A stores the ear position detected first in the setting data 9Z as the initial coordinates (X, Y). When the position of the ear is at the position of the initial coordinates stored in the setting data 9Z, the cellular phone 1A outputs a default sound (standard sound) as step S20. In step S20, the call partner's voice “Hello” is output with a standard sound quality.

  In step S22, the mobile phone 1A detects that the position of the ear has moved from the initial coordinates to the right side in the short direction of the panel 20 to a position (X + 1, Y) shifted by one lattice by using the touch screen 21. In this case, the cellular phone 1A changes the sound quality to be one step higher than the standard sound quality by controlling the electric signal applied to the piezoelectric element 7 as step S24. For example, as shown in FIG. 8B, in the mobile phone 1A, the contact position on the panel 20 of the ear that contacts the panel 20 is close to the right end in the short direction of the panel 20 (for example, the contact position is As the initial coordinates (X, Y) deviate from (X + 1, Y) and (X + 2, Y)), the sound quality of the vibration sound transmitted to the ear by the panel 20 increases (for example, the high sound level of the sound quality increases to +10, +20). Thus, the electric signal applied to the piezoelectric element 7 is controlled so that the low sound level is lowered to -10 and -20. In step S24, the voice “Moshimoshi” of the other party is output with a higher sound quality.

  In step S26, the mobile phone 1A confirms that the position of the ear has been moved from the initial coordinates to the lower side of the panel 20 by one grid (X-1, Y) by the touch screen 21. To detect. In this case, in step S28, the cellular phone 1A controls the electric signal applied to the piezoelectric element 7 to change the sound quality to be one step lower than the standard sound quality. For example, as shown in FIG. 8B, in the mobile phone 1A, the contact position on the panel 20 of the ear that contacts the panel 20 is close to the left end in the short direction of the panel 20 (for example, the contact position is As the initial coordinates (X, Y) deviate from (X-1, Y), (X-2, Y)), the sound quality of the vibration sound transmitted to the ear by the panel 20 decreases (for example, the high sound level of the sound quality is- The electric signal applied to the piezoelectric element 7 is controlled so that the low sound level becomes as high as +10 and +20. In step S28, the voice of the other party “Moshimoshi” is output with a sound quality one step lower.

  In the example shown in FIGS. 7B and 8B, the mobile phone 1A changes the sound quality according to the coordinate in the X-axis direction regardless of the change in the coordinate in the Y-axis direction, even if the coordinate in the Y-axis direction changes. .

  In the present embodiment, the mobile phone 1A may store the changed sound quality level in the setting data 9Z. Then, when the mobile phone 1 </ b> A detects the contact position again within a predetermined time based on the detection result of the touch screen 21, the mobile phone 1 </ b> A may execute the above-described sound quality changing process from the changed sound quality level.

  With reference to FIG. 7C and FIG. 8C, the 3rd control which changes the sound quality which 1 A of mobile telephones perform is demonstrated.

  As illustrated in FIG. 7C, when the contact with the ear panel 20 is detected by the touch screen 21, the mobile phone 1 </ b> A calculates the pressure with which the ear presses the touch screen 21 at the pressing point 91. The pressing of the ear can be appropriately calculated by various methods. For example, when the touch screen 21 is a resistive film type, the number of contact points between the electrodes facing each other can be associated with the pressure. When the touch screen 21 is a capacitance type, the change in capacitance and the pressing can be associated with each other. Then, the mobile phone 1A stores the first calculated pressure as the initial pressure (N) in the setting data 9Z. In step S30, the cellular phone 1A outputs a default sound (standard sound) when the ear pressure corresponds to the initial pressure stored in the setting data 9Z. In step S30, the voice of the other party “Hello” is output with standard sound quality.

  When the mobile phone 1 </ b> A detects that the pressing of the ear pressing the touch screen 21 at the pressing point 92 is changed in the increasing direction in step S <b> 32, the mobile phone 1 </ b> A controls the electrical signal applied to the piezoelectric element 7 to control the sound quality. Is changed from the standard sound quality so as to increase in accordance with the increase in pressure. For example, as shown in FIG. 8C, in the cellular phone 1A, the stronger the press (for example, the stronger the press is N + 1, N + 2), the higher the quality of the vibration sound transmitted to the ear by the panel 20 (for example, the high-quality sound) The electric signal applied to the piezoelectric element 7 is controlled so that the level becomes high (+20, +40 and the low sound level becomes low, -20, -40). In step S32, the voice of the other party “Moshimoshi” is output with a higher sound quality.

  In the example of FIG. 7C, the example has been described in which the mobile phone 1 </ b> A is changed so that the sound quality becomes higher according to the increase of the pressure, but the present invention is not limited to this. When the mobile phone 1 </ b> A detects that the pressing force applied to the touch screen 21 at the pressing point 91 is changed in a decreasing direction, the cellular phone 1 </ b> A controls the electrical signal applied to the piezoelectric element 7 to achieve a standard sound quality. You may change so that it may become low according to the decreasing amount of press from sound quality. For example, as shown in FIG. 8C, in the cellular phone 1A, the lower the pressure is (for example, the weaker the pressure is N-1, N-2), the lower the sound quality of the vibration sound transmitted to the ear by the panel 20 (for example, The electric signal applied to the piezoelectric element 7 is controlled so that the high sound level of the sound quality is lowered to -20 and -40 and the low sound level is raised to +20 and +40.

  In the example of FIG. 7C, the example in which the mobile phone 1 </ b> A changes the sound quality according to the change in the pressure detected by the touch screen 21 has been described, but the present invention is not limited to this. The mobile phone 1 </ b> A may detect the contact area of the ear with the touch screen 21 and change the sound quality according to the size of the area of the contact area. In general, it is considered that the larger the pressure with which the user presses the ear against the panel 20, the larger the area of the ear that contacts the panel 20. In this case, the cellular phone 1A controls the electric signal applied to the piezoelectric element 7 so that the quality of the vibration sound transmitted to the ear by the panel 20 increases as the area of the contact region increases. The cellular phone 1 </ b> A controls the electric signal applied to the piezoelectric element 7 such that the smaller the area of the contact region, the lower the quality of the vibration sound transmitted to the ear by the panel 20.

  With reference to FIG. 9A to FIG. 9C, a control processing procedure for changing the sound quality according to the position of the ear contacting the panel 20 or the pressing of the ear when using the human body conduction method will be described. 9A to 9C is realized by the controller 10 executing the control program 9A.

  With reference to FIG. 9A, a first control processing procedure for changing the sound quality performed by the mobile phone 1A will be described.

  As shown in FIG. 9A, when the panel 20 is vibrated and sound output is started (step S101), the controller 10 determines whether there is an object in contact with the panel 20 based on the detection result of the touch screen 21. Determination is made (step S102). When sound output is started, for example, when an operation for starting sound output by a user is detected, and processing for outputting sound such as a call, music playback, video playback, etc. has started. Includes cases. If there is no object in contact with the panel 20 (step S102, No), the controller 10 returns to the process of step S102 and repeats the process until an object in contact with the panel 20 is detected.

  When there is an object in contact with the panel 20 (step S102, Yes), the controller 10 calculates the position of the object in contact with the panel 20 (that is, the contact position) based on the detection result of the touch screen 21. (Step S103). In step S103, the controller 10 calculates the position of the object in contact with the panel 20 using the method described with reference to FIGS. 6A to 6C. Then, the controller 10 stores the first calculated position of the object in the setting data 9Z as initial coordinates.

  When there is an object in contact with the panel 20, the controller 10 may turn off the display 2 in order to reduce power consumption. If the control for turning off the display 2 by the controller 10 when the proximity sensor 5 detects the approach of the face to the display 2 is implemented in another processing procedure, the control for turning off the display 2 is performed in this implementation procedure. It is not necessary to execute. In general, in a mobile phone such as a smartphone, when the proximity sensor 5 detects the approach of a face to the panel 20, in addition to the control for turning off the display 2, the touch screen 21 detects contact in order to prevent erroneous operation. No control is done. In the present embodiment, since the position of the ear in contact with the panel 20 is detected using the touch screen 21, even when the proximity sensor 5 detects the approach of the face to the panel 20, the touch screen 21. Is left valid.

  Subsequently, after storing the initial coordinates in the setting data 9Z, the controller 10 controls the electric signal applied to the piezoelectric element 7 and outputs a standard sound (step S104). Then, as shown in FIG. 7A, the controller 10 determines whether the contact position of the object has moved in the vertical direction (longitudinal direction of the panel 20) based on the detection result of the touch screen 21 (step S105).

  If it is determined that the contact position of the object has moved in the vertical direction (step S105, Yes), the controller 10 determines whether the movement of the contact position of the object is an upward movement based on the detection result of the touch screen 21. Is determined (step S106). If it is determined that the movement of the contact position of the object is upward (step S106, Yes), the controller 10 has higher sound quality in proportion to the change in the coordinate value of the contact position, as shown in FIG. 8A. As described above, the electrical signal applied to the piezoelectric element 7 is controlled to output sound (step S107). Thereafter, the process proceeds to step S109. On the other hand, if it is determined that the movement of the contact position of the object is downward (No in step S106), the controller 10 has a lower sound quality in proportion to the change in the coordinate value of the contact position, as shown in FIG. 8A. As described above, the electrical signal applied to the piezoelectric element 7 is controlled to output sound. Thereafter, the process proceeds to step S109 (step S108). If it is determined in step S105 that the contact position of the object has not moved in the vertical direction (No in step S105), the process also proceeds to step S109.

  Subsequently, the controller 10 determines whether or not to end the sound output of the panel 20 (step S109). In the case of ending the sound output, for example, when the operation for ending the sound output by the user is detected and the process for outputting the sound such as a call, music playback, video playback, etc. is completed. Includes cases.

  When the sound output is not finished (No at Step S109), the controller 10 re-executes Step S105 and the subsequent steps. When the output of the sound is to be ended (step S109, Yes), the controller 10 ends this process.

  With reference to FIG. 9B, a second control processing procedure for changing the sound quality performed by the mobile phone 1A will be described.

  As shown in FIG. 9B, when the panel 20 is vibrated and sound output is started (step S201), the controller 10 determines whether there is an object in contact with the panel 20 based on the detection result of the touch screen 21. Determination is made (step S202). When there is no object in contact with the panel 20 (step S202, No), the controller 10 returns to the process of step S202 and repeats the process until an object in contact with the panel 20 is detected.

  When there is an object in contact with the panel 20 (step S202, Yes), the controller 10 calculates the position of the object in contact with the panel 20 (that is, the contact position) based on the detection result of the touch screen 21. (Step S203). In step S203, the controller 10 calculates the position of the object in contact with the panel 20 by using the method described with reference to FIGS. 6A to 6C. Then, the controller 10 stores the first calculated position of the object in the setting data 9Z as initial coordinates.

  Subsequently, after storing the initial coordinates in the setting data 9Z, the controller 10 controls the electric signal applied to the piezoelectric element 7 and outputs a standard sound (step S204). Then, as shown in FIG. 7B, the controller 10 determines whether the contact position of the object has moved in the left-right direction (the short direction of the panel 20) based on the detection result of the touch screen 21 (step S205).

  If it is determined that the contact position of the object has moved in the left-right direction (step S205, Yes), the controller 10 determines whether the movement of the contact position of the object is a rightward movement based on the detection result of the touch screen 21. Is determined (step S206). When it is determined that the movement of the contact position of the object is rightward (step S206, Yes), the controller 10 has higher sound quality in proportion to the change in the coordinate value of the contact position, as shown in FIG. 8B. As described above, the electrical signal applied to the piezoelectric element 7 is controlled to output sound (step S207). Thereafter, the process proceeds to step S209. On the other hand, if it is determined that the movement of the contact position of the object is in the left direction (step S206, No), the controller 10 has a lower sound quality in proportion to the change in the coordinate value of the contact position, as shown in FIG. 8B. As described above, the electrical signal applied to the piezoelectric element 7 is controlled to output a sound (step S208). Thereafter, the process proceeds to step S209. If it is determined in step S205 that the contact position of the object has not moved in the left-right direction (step S205, No), the process proceeds to step S209.

  Subsequently, the controller 10 determines whether or not to end the sound output of the panel 20 (step S209). When the sound output is not finished (No at Step S209), the controller 10 re-executes Step S205 and the subsequent steps. When the output of the sound is to be ended (step S209, Yes), the controller 10 ends this process.

  With reference to FIG. 9C, a third control processing procedure for changing the sound quality performed by the mobile phone 1 </ b> A will be described.

  As shown in FIG. 9C, when the panel 20 is vibrated and sound output is started (step S301), the controller 10 determines whether there is an object in contact with the panel 20 based on the detection result of the touch screen 21. Determination is made (step S302). If there is no object in contact with the panel 20 (step S302, No), the controller 10 returns to the process of step S302 and repeats the process until an object in contact with the panel 20 is detected.

  When there is an object in contact with the panel 20 (step S302, Yes), the controller 10 calculates the pressure on the panel 20 of the object in contact with the panel 20 based on the detection result of the touch screen 21 (step S302). S303). In step S303, the controller 10 stores the first calculated pressure of the object in the setting data 9Z as an initial pressure.

  Subsequently, after storing the initial pressure in the setting data 9Z, the controller 10 controls the electric signal applied to the piezoelectric element 7 and outputs a standard sound (step S304). Then, as illustrated in FIG. 7C, the controller 10 determines whether there is a change in the pressure based on the detection result of the touch screen 21 (step S305).

  If it is determined that there is a change in the pressure (step S305, Yes), the controller 10 determines whether the change in the pressure is one step stronger based on the detection result of the touch screen 21 (step S306). If it is determined that the pressure change is one step stronger (step S306, Yes), the controller 10 causes the piezoelectric element to increase in sound quality in proportion to the pressure change, as shown in FIG. 8C. The electric signal applied to 7 is controlled to output a sound (step S307). Thereafter, the process proceeds to step S309. On the other hand, if it is determined that the change in pressure is one step weak (No in step S306), the controller 10 causes the piezoelectric element to decrease in sound quality in proportion to the change in pressure, as shown in FIG. 8C. The electrical signal applied to 7 is controlled to output a sound (step S308). Thereafter, the process proceeds to step S309. If it is determined in step S305 that there is no change in pressing (step S305, No), the process proceeds to step S309.

  Subsequently, the controller 10 determines whether or not to end the sound output of the panel 20 (step S309). When the sound output is not finished (No at Step S309), the controller 10 re-executes Step S305 and the subsequent steps. When the output of the sound is to be ended (step S309, Yes), the controller 10 ends this process.

  According to such control, the user can change the sound quality to be easy to hear while confirming the sound by moving the mobile phone 1A while keeping the ear in contact with the panel 20. Therefore, it is not necessary for the user to take his / her ear off the panel 20 when changing the sound quality, and the possibility of missing a part of the sound can be reduced. In addition, according to such control, it is necessary to repeat a time-consuming operation such as separating the ear and adjusting the sound quality, and then touching the ear again after confirming the sound until the user can change to an appropriate sound quality. Disappears. Therefore, the user can easily and quickly change the mobile phone 1A to an appropriate sound quality when using the mobile phone 1A.

  In the above-described embodiment, the example in which the mobile phone 1A changes the sound quality by any one of the three controls has been described, but the mobile phone 1A may appropriately combine these three controls. In this case, as shown in FIG. 8A to FIG. 8C, the mobile phone 1A can change the high sound level of the sound quality according to the change in the longitudinal direction of the contact position, the change in the short direction of the contact position, and the change in the pressure respectively. The amount of change in the bass level can be controlled differently. Therefore, the user can change the sound quality in more detail by appropriately combining the moving operation of the mobile phone 1A while keeping the ear in contact with the panel 20.

  In the above embodiment, the sound quality is changed so that the sound quality is emphasized by high frequency (so that the high frequency component is increased), and the sound quality is changed so that the sound quality is emphasized by low frequency (so that the low frequency component is increased). Although the example to make was demonstrated, it is not limited to this. The mobile phone 1 </ b> A may change preset values relating to the preset equalizing process, the female-specific sound quality change process, the male-specific sound quality change process, and the noise canceling process according to the contact position or press.

  The process for changing the sound quality may be dynamic range compression (DRC), or may be a process for shifting the frequency to a high sound range or a low sound range without changing the waveform of the frequency characteristic of the audio signal. Further, it may be a multiband compression that divides a human audible frequency band into a plurality of frequency bands and controls the volume for each frequency band. For example, the frequency band used in mobile phones is 300 Hz to 3.4 kHz. For example, this may be divided into 300 Hz to 1 kHz, 1 kHz to 2 kHz, 2 kHz to 3.4 kHz, and the volume of each frequency band may be controlled.

(Embodiment 2)
In the above-described embodiment, the control for changing the sound quality according to the position of the ear that touches the panel 20 or the pressing of the ear when using the human body conduction method has been described. As shown in FIGS. 10A to 10C, different set values (for example, a first set value, a second set value, and a third set value) that determine sound quality can be changed in accordance with the pressing of. FIG. 10A is a diagram illustrating an example of changing the first set value. FIG. 10B is a diagram illustrating an example of changing the second setting value. FIG. 10C is a diagram illustrating an example of changing the third setting value.

  In this case, as illustrated in FIG. 10A, the controller 10 changes the first set value that determines the sound quality of the vibration sound transmitted to the object by the panel according to the change in the first direction of the panel 20 at the contact position. In addition, an electric signal applied to the piezoelectric element 7 is controlled. The first direction is, for example, the longitudinal direction of the panel 20. As shown in FIG. 10B, the controller 10 controls the piezoelectric so that the second set value that determines the sound quality of the vibration sound transmitted to the object by the panel changes according to the change in the second direction of the panel 20 at the contact position. The electric signal applied to the element 7 is controlled. The second direction is, for example, the short direction of the panel 20. As shown in FIG. 10C, the controller 10 outputs an electric signal to be applied to the piezoelectric element 7 so that the third set value that determines the sound quality of the vibration sound transmitted to the object by the panel 20 changes according to the change in pressure. Control.

  For example, the first setting value is a setting value related to the high frequency enhancement process, the second setting value is a setting value related to the low frequency enhancement process, and the third setting value is a setting value related to the preset equalizing process. In addition, the first setting value, the second setting value, and the third setting value may be a setting value related to a process for changing to a female-specific sound quality and a male-specific sound quality, or a setting value related to a noise cancellation process.

  With reference to FIG. 11, as shown in FIG. 10A to FIG. 10C, control in which the mobile phone 1 </ b> A changes different set values for determining sound quality according to the position of the ear and the pressing of the ear will be described. FIG. 11 is a flowchart showing a control processing procedure for changing various setting values for determining sound quality.

  As shown in FIG. 11, when the panel 20 is vibrated and sound output is started (step S401), the controller 10 determines whether there is an object in contact with the panel 20 based on the detection result of the touch screen 21. Determination is made (step S402). If there is no object in contact with the panel 20 (step S402, No), the controller 10 returns to the process of step S402 and repeats the process until an object in contact with the panel 20 is detected.

  When there is an object in contact with the panel 20 (step S402, Yes), the controller 10 calculates the position of the object in contact with the panel 20 based on the detection result of the touch screen 21 (step S403). In step S403, the controller 10 calculates the position of the object in contact with the panel 20 using the method described with reference to FIGS. 6A to 6C. Then, the controller 10 stores the first calculated position of the object in the setting data 9Z as initial coordinates. Subsequently, based on the detection result of the touch screen 21, the controller 10 calculates the pressure on the panel 20 of the object that is in contact with the panel 20 (step S404). In step S404, the controller 10 stores the first calculated pressure of the object in the setting data 9Z as an initial pressure. Then, after storing the initial coordinates and the initial pressure in the setting data 9Z, the controller 10 controls the electric signal applied to the piezoelectric element 7 and outputs a standard sound (step S405).

  Subsequently, as shown in FIG. 7A, the controller 10 determines whether the contact position of the object has moved in the vertical direction (longitudinal direction of the panel 20) based on the detection result of the touch screen 21 (step S406).

  If it is determined that the contact position of the object has moved up and down (step S406, Yes), the controller 10 determines whether the movement of the contact position of the object is an upward movement based on the detection result of the touch screen 21. Is determined (step S407). If it is determined that the movement of the contact position of the object is upward (step S407, Yes), the controller 10 sets the first set value in proportion to the change in the coordinate value of the contact position, as shown in FIG. 10A. Adjustment processing is executed to change the value so as to increase (step S408). Thereafter, the process proceeds to step S410. On the other hand, if it is determined that the movement of the contact position of the object is downward (No in step S407), the controller 10 sets the first set value in proportion to the change in the coordinate value of the contact position, as shown in FIG. 10A. Adjustment processing is performed to change so as to decrease (step S409). Thereafter, the process proceeds to step S410. If it is determined in step S406 that the contact position of the object has not moved vertically (step S406, No), the process also proceeds to step S410.

  Subsequently, as illustrated in FIG. 7B, the controller 10 determines whether the contact position of the object has moved in the left-right direction (the short direction of the panel 20) based on the detection result of the touch screen 21 (step S410). .

  If it is determined that the contact position of the object has moved in the left-right direction (step S410, Yes), the controller 10 determines whether the movement of the contact position of the object is a rightward movement based on the detection result of the touch screen 21. Is determined (step S411). If it is determined that the movement of the contact position of the object is in the right direction (step S411, Yes), the controller 10 sets the second set value in proportion to the change in the coordinate value of the contact position, as shown in FIG. 10B. Adjustment processing is executed to change the value so as to increase (step S412). Thereafter, the process proceeds to step S414. On the other hand, when it is determined that the movement of the contact position of the object is in the left direction (step S411, No), the controller 10 sets the second set value in proportion to the change in the coordinate value of the contact position as illustrated in FIG. 10B. An adjustment process is performed to change so as to decrease (step S413). Thereafter, the process proceeds to step S414. When it is determined in step S410 that the contact position of the object has not moved in the left-right direction (step S410, No), the process proceeds to step S414.

  Subsequently, as illustrated in FIG. 7C, the controller 10 determines whether there is a change in the pressure based on the detection result of the touch screen 21 (step S414).

  If it is determined that there is a change in the pressure (step S414, Yes), the controller 10 determines whether the change in the pressure is one step stronger based on the detection result of the touch screen 21 (step S415). And when it determines with the change of a press being a one step strong thing (step S415, Yes), as shown to FIG. 10C, the controller 10 changes so that a 3rd setting value may become large in proportion to the change of a press. The adjustment process is executed (step S416). Thereafter, the process proceeds to step S418. On the other hand, if it is determined that the change in pressure is one step weak (No in step S415), the controller 10 changes the third set value to be smaller in proportion to the change in pressure, as shown in FIG. 10C. The adjustment process to be executed is executed (step S417). Thereafter, the process proceeds to step S418.

  Subsequently, the controller 10 determines whether or not there is a further change in pressure within a predetermined time (step S418). If it is determined that there is a further change in pressure during the predetermined time (step S418, Yes), the controller 10 re-executes step S415 and subsequent steps. On the other hand, if it is determined that there is no further change in pressure during the predetermined time (step S418, No), the controller 10 outputs the sound corrected by the processing of steps S408, S409, S412, S413, S416, and S417 to the piezoelectric element. The electric signal applied to 7 is controlled and output (step S419). And the controller 10 determines whether the output of the sound of the panel 20 is complete | finished (step S420). When the sound output is not finished (No at Step S420), the controller 10 re-executes Step S406 and the subsequent steps. When the output of sound is to be ended (step S429, Yes), the controller 10 ends this process.

  According to such control, as shown in FIGS. 10A to 10C, the user can change the contact position in the first direction, change in the contact position in the second direction, and press the mobile phone 1A. The first set value, the second set value, and the third set value can be changed in accordance with the change in. Accordingly, the user appropriately combines the moving operation of the mobile phone 1A while keeping the ear in contact with the panel 20, thereby determining the first set value, the second set value, It can be changed to a combination of three set values.

  Although FIGS. 10A to 11 illustrate an example in which all of the three parameters are the first set value, the second set value, and the third set value related to sound quality, the present invention is not limited to this. In the present embodiment, at least one set value of the three parameters may be a set value related to sound quality. For example, the cellular phone 1A executes the above processing with the first setting value as a setting value that determines the level of sound quality, the second setting value as the setting value of the volume, and the third setting value as the setting value of the reception speed. May be.

(Embodiment 3)
In the above-described embodiment, an example in which the touch screen 21 is disposed on almost the entire surface of the panel 20 has been described. However, the touch screen 21 may be disposed so as not to overlap the display 2. FIG. 12 is a front view of the mobile phone 1 </ b> B arranged so that the touch screen 21 does not overlap the display 2. FIG. 13 is a cross-sectional view schematically showing a bb cross section of the mobile phone 1B.

  As shown in FIGS. 12 and 13, in the mobile phone 1 </ b> B, the display 2 is arranged side by side with the panel 20 so as to be flush with the panel 20 rather than inside the panel 20. The touch screen 21 is disposed so as to cover almost the entire front surface of the display 2. That is, the touch screen 21 and the display 2 constitute a so-called touch panel (touch screen display).

  The piezoelectric element 7 is attached to the center of the back surface of the panel 20 by a joining member 30. When an electrical signal is applied to the piezoelectric element 7, the panel 20 vibrates in accordance with deformation (expansion / contraction or bending) of the piezoelectric element 7, and air conduction sound and a part of the human body that contacts the panel 20 (for example, an ear) And vibration sound transmitted through the cartilage. By disposing the piezoelectric element 7 in the center of the panel 20, the vibration of the piezoelectric element 7 is evenly transmitted to the entire panel 20, and the quality of air conduction sound and vibration sound is improved.

  Although the touch screen 21 is not disposed on the front surface of the panel 20, the panel 20 is disposed in the vicinity of the display 2 on which the touch screen 21 is disposed.

  When the user of the mobile phone 1 </ b> B having such a configuration touches his / her ear to the panel 20 in order to hear vibration sound, the panel 20 is in the vicinity of the touch screen 21, and thus a part of the ear touches the touch screen 21. To do. For this reason, the detection area of the touch screen 21 is divided into a lattice shape, and the detection state of the contact of the ear in each of the divided areas is converted into the corresponding pixel state, whereby an image 76 as shown in FIG. Is obtained.

  When the image 76 is obtained, the cellular phone 1B obtains the relative position of the image 76 and the specimen 75 when they are most matched by pattern matching. In the case of the example in FIG. 14, when the sample 75 is shifted by x4 in the X-axis direction and −y4 in the Y-axis direction with the upper left of the image 76 as a reference, the two match best. In this case, the position of the ear is calculated as (x4, -y4). The cellular phone 1B can also detect the position of the ear using the specimen 74 including the reference position 74a.

  As described above, the mobile phone 1 </ b> B can detect the position of the ear in contact with the panel 20 using the touch screen 21 even if the touch screen 21 is arranged so as not to overlap the display 2. Therefore, the mobile phone 1B can execute control for changing the sound quality in accordance with the position of the ear in contact with the panel 20, similarly to the mobile phone 1A.

(Embodiment 4)
In the above-described embodiment, an example in which at least a part of the touch screen 21 is disposed so as to overlap the display 2 has been described, but the touch screen 21 may be disposed so as not to overlap the display 2. FIG. 15 is a front view of the mobile phone 1 </ b> C arranged so that the touch screen 21 does not overlap the display 2. FIG. 16 is a cross-sectional view schematically showing a cc cross section of the mobile phone 1C.

  As shown in FIGS. 15 and 16, in the mobile phone 1 </ b> C, the display 2 is arranged side by side with the panel 20 so as to be in the same plane as the panel 20, not inside the panel 20.

  The piezoelectric element 7 is attached to the center of the back surface of the panel 20 by a joining member 30. A reinforcing member 31 is disposed between the panel 20 and the piezoelectric element 7. That is, in the cellular phone 1 </ b> C, the piezoelectric element 7 and the reinforcing member 31 are bonded by the bonding member 30, and the reinforcing member 31 and the panel 20 are bonded by the bonding member 30.

  The reinforcing member 31 is an elastic member such as rubber or silicon. The reinforcing member 31 may be a metal plate made of aluminum or the like having a certain degree of elasticity, for example. The reinforcing member 31 may be a stainless plate such as SUS304. The thickness of a metal plate such as a stainless steel plate is suitably 0.2 mm to 0.8 mm, for example, depending on the voltage value applied to the piezoelectric element 7 or the like. The reinforcing member 31 may be a resin plate, for example. As resin which forms the resin-made board here, a polyamide-type resin is mentioned, for example. Examples of the polyamide-based resin include Reny (registered trademark), which is made of a crystalline thermoplastic resin obtained from metaxylylenediamine and adipic acid and is rich in strength and elasticity. Such a polyamide-based resin may be a reinforced resin reinforced with glass fiber, metal fiber, carbon fiber, or the like using itself as a base polymer. The strength and elasticity of the reinforced resin are appropriately adjusted according to the amount of glass fiber, metal fiber, carbon fiber, or the like added to the polyamide-based resin. The reinforced resin is formed, for example, by impregnating a resin into a base material formed by braiding glass fiber, metal fiber, carbon fiber or the like and curing it. The reinforced resin may be formed by mixing a finely cut fiber piece into a liquid resin and then curing it. The reinforced resin may be a laminate of a base material in which fibers are knitted and a resin layer.

  By disposing the reinforcing member 31 between the piezoelectric element 7 and the panel 20, the following effects can be obtained. When an external force is applied to the panel 20, the possibility that the external force is transmitted to the piezoelectric element 7 and the piezoelectric element 7 is damaged can be reduced. For example, when an external force is applied to the panel 20 by the mobile phone 1 </ b> C falling on the ground, the external force is first transmitted to the reinforcing member 31. Since the reinforcing member 31 has predetermined elasticity, it is elastically deformed by an external force transmitted from the panel 20. Therefore, at least a part of the external force applied to the panel 20 is absorbed by the reinforcing member 31, and the external force transmitted to the piezoelectric element 7 is reduced. As a result, damage to the piezoelectric element 7 can be reduced. When the reinforcing member 31 is disposed between the piezoelectric element 7 and the casing 40, the casing 40 is deformed, for example, when the mobile phone 1C falls on the ground, and the deformed casing 40 collides with the piezoelectric element 7 and the piezoelectric element. The possibility that 7 is damaged can be reduced.

  Vibration due to expansion / contraction or bending of the piezoelectric element 7 is first transmitted to the reinforcing member 31 and further transmitted to the panel 20. That is, the piezoelectric element 7 first vibrates the reinforcing member 31 having a larger elastic coefficient than the piezoelectric element 7 and further vibrates the panel 20. Therefore, the cellular phone 1 </ b> C does not include the reinforcing member 31, and it is possible to make the deformation of the piezoelectric element 7 less likely to be excessive as compared with a structure in which the piezoelectric element 7 is bonded to the panel 20 by the bonding member 70. Thereby, the deformation amount (degree of deformation) of the panel 20 can be adjusted. This structure is particularly effective in the case of the panel 20 that hardly obstructs the deformation of the piezoelectric element 7.

  Furthermore, by disposing the reinforcing member 31 between the piezoelectric element 7 and the panel 20, as shown in FIG. 18, the resonance frequency of the panel 20 is lowered and the acoustic characteristics in the low frequency band are improved. FIG. 18 is a diagram illustrating an example of a change in frequency characteristics due to the reinforcing member 31. FIG. 18 shows a frequency characteristic when a sheet metal such as SUS304 is used as the reinforcing member 31 and a frequency characteristic when a reinforced resin such as Reny is used as the reinforcing member 31. . The horizontal axis represents frequency and the vertical axis represents sound pressure. The resonance point when reinforced resin is used is about 2 kHz, and the resonance point when sheet metal is used is about 1 kHz. The dip when using reinforced resin is about 4 kHz, and the dip when using sheet metal is about 3 kHz. That is, when the reinforced resin is used, the resonance point of the panel 20 is located in a higher frequency region and the frequency characteristic dip is located in a higher frequency region, compared to the case where a sheet metal is used. Since the frequency band used for the voice call of the mobile phone is 300 Hz to 3.4 kHz, when reinforced resin is used as the reinforcing member 31, the dip can be prevented from being included in the use frequency band of the mobile phone 1C. . Even when a sheet metal is used as the reinforcing member 31, the dip is not included in the use frequency band of the cellular phone 1C by appropriately adjusting the type or composition of the metal constituting the sheet metal or the thickness of the sheet metal. be able to. When the sheet metal and the reinforced resin are compared, the reinforced resin can reduce the influence on the antenna performance as compared with the sheet metal. Since reinforced resin is less likely to be plastically deformed than sheet metal, there is an advantage that acoustic characteristics are less likely to change. The reinforced resin suppresses the temperature rise at the time of sound generation compared to the sheet metal. Instead of the reinforcing member 31, a plate-like weight may be attached to the piezoelectric element 7 by the joining member 30.

  When an electrical signal is applied to the piezoelectric element 7, the panel 20 vibrates in accordance with deformation (expansion / contraction or bending) of the piezoelectric element 7, and air conduction sound and a part of the human body that contacts the panel 20 (for example, an ear) And vibration sound transmitted through the cartilage. The touch screen 21 is disposed so as to cover almost the entire front surface of the panel 20.

  When the user of the mobile phone 1C configured as described above touches the panel 20 to hear the vibration sound, the touch screen 21 is smaller than the ear, but a part of the ear touches the touch screen 21. To do. For this reason, the detection area of the touch screen 21 is divided into a lattice shape, and the detection state of the contact of the ear in each of the divided areas is converted into the corresponding pixel state, whereby an image 77 as shown in FIG. Is obtained.

  When the image 77 is obtained, the cellular phone 1 </ b> C obtains a relative position between the image 77 and the specimen 75 when they are most matched by pattern matching. In the case of the example in FIG. 18, when the sample 75 is shifted by x5 in the X-axis direction and −y5 in the Y-axis direction with reference to the upper left of the image 77, the two match best. In this case, the position of the ear is calculated as (x5, -y5). The cellular phone 1B can also detect the position of the ear using the specimen 74 including the reference position 74a.

  As described above, the mobile phone 1 </ b> C can detect the position of the ear in contact with the panel 20 using the touch screen 21 even if the touch screen 21 is disposed so as not to overlap the display 2. Therefore, the mobile phone 1 </ b> C can execute control for changing the sound quality according to the position of the ear in contact with the panel 20, similarly to the mobile phone 1 </ b> A.

(Other embodiments)
Embodiments disclosed in the present application can include matters that are apparent to those skilled in the art, and can be modified without departing from the spirit and scope of the invention. Furthermore, the embodiment disclosed in the present application and its modifications can be combined as appropriate. For example, the above embodiment may be modified as follows.

  For example, each program shown in FIG. 5 may be divided into a plurality of modules, or may be combined with other programs.

  In the above-described embodiment, an example in which the position of an object in contact with the panel 20 is detected using the touch screen 21 has been described. However, the detection unit that detects the position of the object is not limited to the touch screen 21. For example, the detection unit that detects the position of the object may be the camera 12. In this case, the position of the object is detected based on the image acquired by the camera 12.

  In the above-described embodiment, an example in which the movement of an object in contact with the panel 20 is detected using the touch screen 21 has been described. However, the detection unit that detects the movement of the object is not limited to the touch screen 21. For example, the movement of the object may be detected based on an image acquired by the camera 12 or may be detected by an acceleration sensor included in the posture detection unit 15.

  In the above embodiment, an example is shown in which sound quality adjustment is performed on the assumption that an object that contacts the panel 20 is an ear. However, the mobile phones 1A to 1C determine whether an object that contacts the panel 20 is an ear. It may be determined and sound quality adjustment may be performed only when the ear is used. By controlling in this way, when the ear is in contact with the panel 20, the sound quality is adjusted according to the position of the ear, and when the finger is in contact with the panel 20, processing according to the contact operation is performed. Control can be switched according to the situation, such as executing. Whether or not the object in contact with the panel 20 is an ear can be determined, for example, by increasing the accuracy of pattern matching with a specimen.

  In the above embodiment, an example in which the mobile phone changes the sound quality of the vibration sound according to the contact position or contact area of the ear with respect to the panel 20 or the pressing of the ear is shown, but the present invention is not limited to this. For example, the mobile phone may change the quality of the vibration sound according to the number of times the ear touches the panel 20 within a predetermined time. Further, the sound quality of the vibration sound may be changed according to the image captured by the camera 12 with the ear in contact with the panel or the detection result of the posture detection unit 15.

  In the above-described embodiment, an example has been described in which the mobile phone changes the setting value associated with the position change according to the position change from the initial coordinates, but the present invention is not limited to this. When detecting the contact position of the ear, the mobile phone may change the set value of the sound quality associated with the position on the panel in advance.

  In addition, the mobile phone 1A executes a process of switching to the optimal scene mode sound according to the location of the user according to the change in the first direction of the contact position and the change in the second direction of the contact position. Also good. Examples of the optimal scene mode sound according to location include sound suitable for a specific location such as a movie theater, a stadium, a live house, a marble bathroom, and a church. For example, when detecting that the contact position has moved a certain distance upward in the longitudinal direction, the mobile phone 1A switches to the movie theater setting. In the cinema setting, the audio output using the human body conduction method is set to 100%. When the mobile phone 1A detects that the contact position has moved a certain distance downward in the longitudinal direction, it switches to the stadium setting. In the stadium setting, the sound output using the human body conduction method is set to 80%, and the sound output by the dynamic speaker is set to 20%. When the mobile phone 1A detects that the contact position has moved a certain distance to the right in the short direction, the mobile phone 1A switches to the live house setting. In the live house setting, the audio output using the human body conduction method is set to 80%, the audio output by the dynamic speaker is set to 20%, and the noise reduction function is set to be executed. When the mobile phone 1A detects that the contact position has moved a certain distance to the left in the short direction, the mobile phone 1A switches to the marble bathroom setting. In the marble bathroom setting, the sound output using the human body conduction method is set to 20%, the sound output by the dynamic speaker is set to 80%, and the reverb removal function is set to be executed.

  In the above-described embodiment, an example in which the display 2 is attached to the back surface of the panel 20 using the bonding member 30 as the mobile phone 1A has been described. However, the mobile phone 1A has a space between the panel 20 and the display 2. May be configured. By providing a space between the panel 20 and the display 2, the panel 20 easily vibrates, and the range on which the vibration sound can be easily heard on the panel 20 is widened.

  In the above embodiment, the example in which the piezoelectric element 7 is attached to the panel 20 has been described, but the piezoelectric element 7 may be attached to another place. For example, the piezoelectric element 7 may be attached to a battery lid. The battery lid is a member that is attached to the housing 40 and covers the battery. Since the battery lid is often attached to a surface different from the display 2 in a portable electronic device such as a cellular phone, according to such a configuration, the user can place a part of the body (for example, an ear) on a surface different from the display 2. You can hear the sound by touching. The piezoelectric element 7 may be configured to vibrate corners of the housing 40 (for example, at least one of the four corners). In this case, the piezoelectric element 7 may be configured to be attached to the inner surface of the corner portion of the housing 40, or further provided with an intermediate member, and the vibration of the piezoelectric element 7 is transmitted to the corner portion of the housing 40 via the intermediate member. But you can. According to this configuration, the vibrating range can be made relatively narrow, so that air conduction sound generated by the vibration is difficult to leak to the surroundings. In addition, according to this configuration, for example, the air conduction sound and the vibration sound are transmitted to the user in a state where the user inserts the corner portion of the housing into the ear canal, so that ambient noise hardly enters the user's ear canal. Therefore, the quality of the sound transmitted to the user can be improved.

  In said embodiment, although the reinforcement member 31 is a plate-shaped member, the shape of the reinforcement member 31 is not restricted to this. For example, the reinforcing member 31 may have a shape that is larger than the piezoelectric element 7 and has an end that curves toward the piezoelectric element 7 and covers the side of the piezoelectric element 7. The reinforcing member 31 may have, for example, a shape having a plate-like portion and an extending portion that extends from the plate-like portion and covers the side portion of the piezoelectric element 7. In this case, it is preferable that the extended portion and the side portion of the piezoelectric element 7 are separated by a predetermined distance. Thereby, it becomes difficult for the extending part to inhibit the deformation of the piezoelectric element.

  In addition, the panel 20 can constitute a part or all of any of a display panel, an operation panel, a cover panel, and a lid panel for making the rechargeable battery removable. In particular, when the panel 20 is a display panel, the piezoelectric element 7 is disposed outside the display area for the display function. As a result, there is an advantage that the display is hardly disturbed. The operation panel includes a touch panel. In addition, the operation panel includes a sheet key that is a member constituting one surface of the operation unit side casing, in which, for example, a key top of an operation key is integrally formed in a foldable mobile phone.

  In addition, the joining member which adhere | attaches the panel 20 and the piezoelectric element 7, the joining member which adhere | attaches the panel 20 and the housing 40, etc. were demonstrated as the joining member 30 which has the same code | symbol. However, different joining members may be used as appropriate depending on the members to be joined.

  In the above embodiment, a mobile phone has been described as an example of a device according to the appended claims. However, the device according to the appended claims is not limited to a mobile phone. The device according to the appended claims may be a mobile electronic device other than a mobile phone. Examples of the portable electronic device include, but are not limited to, a tablet, a portable personal computer, a digital camera, a media player, an electronic book reader, a navigator, and a game machine.

  The characterizing embodiments have been described in order to fully and clearly disclose the technology according to the appended claims. However, the appended claims should not be limited to the above-described embodiments, but all modifications and alternatives that can be created by those skilled in the art within the scope of the basic matters shown in this specification. Should be configured to embody such a configuration.

1A to 1C Mobile phone 2 Display 3 Button 4 Illuminance sensor 5 Proximity sensor 6 Communication unit 7 Piezoelectric element 8 Microphone 9 Storage 9A Control program 9B Call application 9C Music playback application 9D Video playback application 9Z Setting data 10 Controller 11 Speaker 12 Camera 15 Attitude Detection unit 18 Vibrator 20 Panel 21 Touch screen 30 Joining member 31 Reinforcing member 40 Housing

Claims (20)

A piezoelectric element;
A sound generator that vibrates by the piezoelectric element and generates air conduction sound and vibration sound transmitted by vibrating a part of the human body;
A detection unit that detects contact of a part of the human body with respect to the sound generation unit,
An electronic device in which sound quality of the vibration sound changes according to a detection result of the detection unit. The detection unit detects a contact position of the part of the human body with respect to the sound generation unit,
The electronic device according to claim 1, wherein a sound quality of the vibration sound changes according to a contact position detected by the detection unit.   As the contact position approaches one end of the sound generator, the quality of the vibration sound changes such that the high frequency component of the vibration sound increases, and the contact position is the other end of the sound generator. The electronic device according to claim 2, wherein the sound quality of the vibration sound changes such that a low frequency component of the vibration sound increases as the position approaches the portion.   The electronic device according to claim 3, wherein a sound quality of the vibration sound changes to a sound quality associated with a position on a sound generation unit.   The electronic apparatus according to claim 3, wherein the sound quality of the vibration sound changes based on a degree of change in sound quality associated with a change in contact position. The detection unit detects a pressure on the sound generation unit of a part of the human body,
The electronic device according to claim 1, wherein a sound quality of the vibration sound changes according to the pressing.   The sound quality of the vibration sound changes so that the high frequency component of the vibration sound increases as the press is strong, and the sound quality of the vibration sound increases so that the low frequency component of the vibration sound increases as the pressure is weak. The electronic device according to claim 6 which changes. The detection unit detects a contact area of the part of the human body with the sound generation unit,
The electronic device according to claim 1, wherein a sound quality of the vibration sound changes according to a size of a contact area detected by the detection unit.   A first set value that determines a sound quality of the vibration sound changes according to a change in the first direction of the contact position, and a sound quality of the vibration sound changes according to a change in the second direction of the contact position. The electronic device according to claim 2, wherein the second set value to be determined changes. The piezoelectric element is mounted in the vicinity of the longitudinal end of the sound generating unit,
The first direction is a longitudinal direction of the sound generator,
The electronic device according to claim 9, wherein the second direction is a short direction of the sound generation unit. The detection unit detects a pressure on the sound generation unit of a part of the human body,
The electronic device according to claim 9 or 10, wherein a third set value that determines a sound quality of the vibration sound changes according to the change in the pressure.   The electronic device according to claim 1, wherein a sound quality of the vibration sound changes when a part of the human body is an ear. The detection unit detects a contact range of the human body with respect to the sound generation unit;
The electronic device according to claim 12, wherein the detection unit determines whether a part of the human body is an ear based on the detected contact range.   The sound generator is a region wider than a region having a length corresponding to the distance from the lower leg of the human ear to the antitragus and a width corresponding to the distance from the tragus to the antique. The electronic device according to claim 1, wherein the device vibrates.   The said sound generation part comprises a part or all of any one of the lid panel for enabling a display panel, an operation panel, a cover panel, and a rechargeable battery to be removable. Electronics. When the sound generator is a display panel,
The electronic device according to claim 15, wherein the piezoelectric element is disposed outside a display area for the display function.   The electronic device according to any one of claims 1 to 16, wherein the sound generation unit is deformed to transmit an air conduction sound and a human body vibration sound at any location of the sound generation unit.   The sound generator has a plurality of locations that vibrate in a direction intersecting the main surface of the sound generator in the vibration region, and in each of the locations, the amplitude value of the vibration is changed from plus to minus with time. The electronic device according to any one of claims 1 to 17, wherein the electronic device fluctuates or vice versa. A control method executed by an electronic device including a sound generator and a piezoelectric element,
Vibrating the sound generation unit with the piezoelectric element to generate air conduction sound and vibration sound transmitted by vibrating a part of the human body in the sound generation unit;
Detecting the contact of a part of the human body with the sound generator,
A control method in which sound quality of the vibration sound changes according to a detection result of the detecting step. In an electronic device equipped with a sound generator and a piezoelectric element,
Vibrating the sound generation unit with the piezoelectric element to generate air conduction sound and vibration sound transmitted by vibrating a part of the human body in the sound generation unit;
Detecting a contact of a part of the human body with respect to the sound generation unit; and
A control program in which sound quality of the vibration sound changes according to a detection result of the detecting step.

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