JP2013232853A - Electronic apparatus, control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit sounds to a user in a state that allows the user to easily hear.SOLUTION: An electronic apparatus 1 (a portable telephone) includes: a housing 40; a piezoelectric element 7a; a first sound generation part (for example, a panel 20) which is vibrated by the piezoelectric element, generates air conduction sounds and vibration sounds transmitted by vibrating part of a human body; and a second sound generation part (for example, a dynamic receiver 7b); and a posture detection part (for example, a posture detection unit 15). The first sound generations part (for example, the panel 20) or the second sound generation part (for example, the dynamic receiver 7b) generates sounds on the basis of a detection result of the posture detection part (for example, the posture detection unit 15).

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

  By the way, in general, there is a need for electronic devices to convey to a user in a state where sound can be easily heard.

  An electronic device according to one aspect includes a housing, a piezoelectric element, a first sound generation unit that generates vibration sound that is transmitted by vibrating the air conduction sound and a part of the human body, and is vibrated by the piezoelectric element. A second sound generation unit; and a posture detection unit, wherein the first sound generation unit or the second sound generation unit generates a sound based on a detection result of the posture detection unit.

  A control method according to one aspect includes a piezoelectric element, a first sound generating unit that generates vibration sound that is transmitted by vibrating the piezoelectric element and vibrating part of a human body, and second sound generation. A control method executed by an electronic device comprising: a first sound generation unit; and a second sound generation unit based on a detection result of the posture detection unit. And a step of generating a sound from the determined first sound generation unit or the second sound generation unit.

  A control program according to one aspect includes a piezoelectric element, a first sound generating unit that generates vibration sound that is transmitted by vibrating an air conduction sound and a part of a human body, and a second sound generation. A step of causing an electronic device comprising a unit and a posture detection unit to generate sound from the first sound generation unit or the second sound generation unit based on a detection result of the posture detection unit; Generating a sound from the determined first sound generating unit or the second sound generating unit.

FIG. 1 is a front view of the mobile phone according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line aa of the mobile phone shown in FIG. 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 cross-sectional view of the mobile phone shown in FIG. FIG. 6 is a cross-sectional view showing a schematic configuration of another configuration of the second microphone. FIG. 7 is a block diagram of the mobile phone according to the embodiment. FIG. 8 is a flowchart showing a control processing procedure during a call. FIG. 9 is a flowchart showing a processing procedure for controlling the audio output mode. FIG. 10 is a flowchart showing a control processing procedure during a call. FIG. 11 is a front view of the mobile phone according to the second embodiment. 12 is a cross-sectional view taken along line cc of the mobile phone shown in FIG. FIG. 13 is a front view of the mobile phone according to the third embodiment. 14 is a cross-sectional view taken along the line dd of the mobile phone shown in FIG. FIG. 15 is a diagram illustrating an example of the resonance frequency of the panel.

  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)
The overall configuration of the mobile phone 1A according to the first embodiment will be described with reference to FIG. 1 and FIG. FIG. 1 is a front view of a mobile phone 1A according to the first embodiment. 2 is a cross-sectional view taken along the line aa of the mobile phone 1A shown in FIG. 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 7a, a dynamic receiver (second sound generator) 7b, A first microphone 8a, a second microphone 8b, a camera 12, a panel (first sound generating unit) 20, and a housing 40 are provided.

  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 7a expands or contracts according to the electromechanical coupling coefficient of the constituent material. That is, the piezoelectric element 7a is deformed when an electric signal is applied. The piezoelectric element 7 a is attached to the panel 20 and is used as a vibration source for vibrating the panel 20. The piezoelectric element 7a is formed using, for example, ceramic or quartz. The piezoelectric element 7a 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 dynamic receiver 7b is a sound output unit that outputs sound by an air conduction method. The dynamic receiver 7b can transmit the sound obtained by converting the electric signal to a person whose ear is not in contact with the mobile phone 1A. The dynamic receiver 7b is a mechanism that outputs sound by vibrating a diaphragm with a voice coil. The dynamic receiver 7b mainly includes a permanent magnet, a voice coil, and a diaphragm. When an electrical signal (voltage corresponding to a sound signal) is applied to the voice coil, the dynamic receiver 7b becomes an electromagnet and vibrates in a predetermined direction with respect to the permanent magnet. The dynamic receiver 7b vibrates the diaphragm connected to the voice coil by vibrating the voice coil. The vibration plate vibrates the surrounding air and transmits sound to the surroundings. The dynamic receiver 7b serves as a receiver that outputs the voice of the call while the user presses the ear against the housing 40 during the call. The dynamic receiver 7b also serves as a speaker that outputs sound with an output in which sound can be heard by the user who is away from the housing 40. The dynamic receiver 7b is used, for example, for outputting a ring tone or outputting a call voice when used in a speakerphone mode.

  The first microphone 8a and the second microphone 8b are sound input units. The first microphone 8a and the second microphone 8b convert the input sound into an electrical signal.

  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 with the deformation (expansion or contraction or bending) of the piezoelectric element 7a, and transmits the vibration as sound vibration to an 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, the piezoelectric element 7a, and the like from external forces. 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 a are attached to the back surface of the panel 20 by the joining member 30. The piezoelectric element 7a is spaced from the inner surface of the housing 40 by a predetermined distance in a state where the piezoelectric element 7a is disposed on the back surface of the panel 20. The piezoelectric element 7a 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 7a and the inner surface of the housing 40 is preferably larger than the maximum deformation amount of the piezoelectric element 7a. The piezoelectric element 7a 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 a 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 a is parallel to the short direction of the panel 20. The display 2 and the piezoelectric element 7 a 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 auricular cartilage or the like that contacts the panel 20 in order to hear sound.

  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 dynamic receiver 7b, the first microphone 8a, the second microphone 8b, the camera 12, the panel 20, and the like. The housing 40 supports the piezoelectric element 7 a via the panel 20.

  The layout of each part arranged in the housing 40 will be described. Hereinafter, the arrangement of the piezoelectric element 7a, the dynamic receiver 7b, the first microphone 8a, and the second microphone 8b will be described in particular. In the mobile phone 1A, the housing 40 has a substantially rectangular parallelepiped shape with a small thickness. In the mobile phone 1 </ b> A, the display 2 and the panel 20 are arranged on one surface of the housing 40. In the cellular phone 1 </ b> A, the piezoelectric element 7 a and the dynamic receiver 7 b are disposed on one surface of the housing 40 at positions facing each other with the display 2 and the panel 20 interposed therebetween. Specifically, the piezoelectric element 7 a is disposed on one end 40 a side in the longitudinal direction of one surface of the housing 40. The dynamic receiver 7 b is disposed on the other end 40 b side in the longitudinal direction of one surface of the housing 40. One surface of the housing 40 of the present embodiment has a rectangular shape, and the end portions 40a and 40b which are ends in the longitudinal direction are short sides. Thus, in the cellular phone 1 </ b> A, the piezoelectric element 7 a is disposed at one end 40 a of the housing 40, and the dynamic receiver 7 b is disposed at the other end 40 of the housing 40. Furthermore, the piezoelectric element 7 a and the dynamic receiver 7 b are disposed in the center of the short side direction of one surface of the housing 40. That is, the piezoelectric element 7a and the dynamic receiver 7b are respectively arranged on the one surface of the housing 40 at the end in the longitudinal direction and the center in the lateral direction. By disposing the piezoelectric element 7a and the dynamic receiver 7b in the center in the short direction, the usability as a receiver can be improved.

  In the cellular phone 1A, the illuminance sensor 4, the proximity sensor 5, the camera 12, and the second microphone 8b are arranged on one end 40a side of the housing 40, that is, in the vicinity of the piezoelectric element 7a. In the mobile phone 1A, the first microphone 8a is disposed on the other end 40b side of the housing 40, that is, in the vicinity of the dynamic receiver 7b. Thus, in the mobile phone 1 </ b> A, the second microphone 8 b is disposed at one end 40 a of the housing 40, and the first microphone 8 a is disposed at the other end 40 b of the housing 40. Therefore, the first microphone 8a is disposed at the end 40b opposite to the end 40a where the piezoelectric element 7a is disposed. The second microphone 8b is disposed at the end 40a opposite to the end 40b where the dynamic receiver 7b is disposed. The first microphone 8a and the second microphone 8b are respectively arranged on different end portions in the short side direction of one surface of the housing 40. That is, the first microphone 8a and the second microphone 8b are respectively disposed in the vicinity of the farthest corners that are diagonally located on one surface of the housing 40.

  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 sound to be output is applied to the piezoelectric element 7a. 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 7a. 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 7a 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 7a.

  When an electric signal is applied, the piezoelectric element 7a expands or contracts or bends in the longitudinal direction. The panel 20 to which the piezoelectric element 7a is attached is deformed in accordance with expansion / contraction or bending of the piezoelectric element 7a. 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 air conduction sound and vibration sound that is conducted to the user through the part of the body. . That is, the panel 20 vibrates at a frequency perceived as a vibration sound with respect to an object in contact with the panel 20 as the piezoelectric element 7a is deformed.

  For example, when an electrical signal corresponding to voice data of a call partner or a ring tone, music or the like is applied to the piezoelectric element 7a, the panel 20 generates air conduction sound and vibration sound corresponding to the electrical signal. Let The sound signal output via the piezoelectric element 7a 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 7a 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 7a 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 7a 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 rigidity of the lower part of the panel 20 (the side where the display 2 is attached) is increased, and the vibration is smaller than that of the upper part of the panel 20 (the side where the piezoelectric element 7a 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 mobile phone 1 </ b> A can transmit sound to the user as vibration air that passes through a part of the user's body (for example, auricular cartilage) by 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, it is not necessary to form an opening (sound emission port) 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. In order to realize a waterproof structure, the cellular phone 1A may adopt a structure in which an opening such as a sound outlet of the dynamic speaker 7b is closed by a member that allows gas to pass but not liquid. An example of the member that allows gas to pass but not liquid is Gore-Tex (registered trademark).

  The configuration of the second microphone 8b will be described with reference to FIG. Although the second microphone 8b will be described with reference to FIG. 5, the first microphone 8a has the same configuration. FIG. 5 is a cross-sectional view taken along the line bb of the mobile phone 1A shown in FIG. The second microphone 8 b is disposed inside the housing 40. The second microphone 8 b includes a microphone body 50 and sound insulation members 52 and 53. The casing 40 has a microphone hole 54 formed on the surface on which the panel 20 and the touch screen 21 are arranged. The microphone hole 54 is formed at a position facing the microphone body 50. The space near the microphone main body 50 inside the housing 40 and the space outside the housing 40 communicate with each other through the microphone hole 54. Sound propagating in the space outside the housing 40 reaches the microphone body 50 through the microphone hole 54.

  The microphone body 50 is a part that detects sound collection, that is, sound. The microphone body 50 is arranged at a position facing the microphone hole 54 inside the housing 40. The microphone body 50 is arranged at a position spaced from the microphone hole 54. The sound insulation member 52 is disposed between the microphone main body 50 and the microphone hole 54 inside the housing 40. The sound insulation member 52 is disposed so as to surround the space between the microphone body 50 and the microphone hole 54, and blocks the space between the microphone body 50 and the microphone hole 54 from the inside of the housing 40. . Thereby, the sound insulation member 52 makes it difficult for the sound inside the housing 40 to reach the microphone body 50. The second microphone 8 b detects the sound that has passed through the microphone hole 54 from the outside of the housing 40 and reached the microphone body 50.

  Here, in FIG. 5, the microphone hole 54 is formed on the surface of the housing 40 on which the panel 20 and the touch screen 21 are arranged, but the present invention is not limited to this. The microphone hole 54 may be formed on the side surface of the housing 40, that is, the surface including the thickness direction of the housing 40.

  FIG. 6 is a cross-sectional view showing a schematic configuration of another configuration of the second microphone. The second microphone 8 c illustrated in FIG. 6 is disposed inside the housing 40. The second microphone 8 c includes a microphone body 50 and sound insulation members 62 and 63. The housing 40 has a microphone hole 64 formed on a side surface. The side surface of the housing 40 is a surface connected to the surface on which the panel 20 and the touch screen 21 are arranged, and is a surface that becomes the end portion 40a in the longitudinal direction.

  The microphone main body 50 is a part that detects sound. The microphone main body 50 is installed inside the housing 40 on the side opposite to the surface on which the panel 20 and the touch screen 21 are arranged. The microphone main body 50 is disposed at a position that is not visible even when looking into the microphone hole 64 from the outside of the housing 40. The microphone body 50 is arranged at a position spaced from the microphone hole 64. The sound insulation members 62 and 63 are disposed between the microphone main body 50 and the microphone hole 64 inside the housing 40. The sound insulation members 62 and 63 are disposed so as to surround the space between the microphone body 50 and the microphone hole 64, and block the space between the microphone body 50 and the microphone hole 64 from the inside of the housing 40. ing. As a result, the sound insulating members 62 and 63 make it difficult for the sound inside the housing 40 to reach the microphone body 50. The sound insulating members 62 and 63 guide the sound that has passed through the microphone hole 64 to the microphone main body 50 that is disposed at a position where the sound cannot be seen even if the microphone hole 64 is viewed. The second microphone 8 c detects sound that has passed through the microphone hole 64 from the outside of the housing 40 and reached the microphone body 50. The second microphone 8c can prevent the microphone from being blocked during use by providing the microphone hole 64 on the side surface of the housing 40. Thereby, a sound can be detected more suitably.

  The functional configuration of the mobile phone 1A will be described with reference to FIG. FIG. 7 is a block diagram of the mobile phone 1A. As shown in FIG. 7, 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 7a, a dynamic receiver 7b, and a first microphone 8a. , A second microphone 8b, a storage 9, a controller 10, 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 functions provided by the control program 9A include a function for performing control for determining a control mode used at the time of sound output, a piezoelectric element 7a, a dynamic receiver 7b, a first microphone 8a, and a second based on the determined control mode. A function for controlling the microphone 8b is included. 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 units include, for example, the display 2, the communication unit 6, the piezoelectric element 7a, the dynamic receiver 7b, the first microphone 8a, the second microphone 8b, and the vibrator 18, but are 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 a control program 9A to execute control for determining a control mode to be used at the time of sound output. For example, the controller 10 executes the control program 9A to control the piezoelectric element 7a, the dynamic receiver 7b, the first microphone 8a, and the second microphone 8b based on the determined control mode.

  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. 7, 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. 7, 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 mobile phone 1A shown in FIG. 7 is an example, and may be changed as appropriate without departing from the scope 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.

  With reference to FIGS. 8 to 10, control for determining a control mode to be used at the time of sound output, and the piezoelectric element 7 a, dynamic receiver 7 b, first microphone 8 a, and second microphone based on the determined control mode. Control with 8b will be described. FIG. 8 is a flowchart showing a control processing procedure during a call. FIG. 9 is a flowchart showing a processing procedure for controlling the audio output mode. FIG. 10 is a flowchart showing a control processing procedure during a call. The processing procedure shown in FIGS. 8 to 10 is realized by the controller 10 executing the control program 9A. 8 to 10 will be described as processing when performing a voice call with another communication apparatus. Various processes executed in the voice call are executed by the controller 10 using the communication unit 6 by executing the call application 9B.

  As step S20, the controller 10 determines whether a call has been started. If the controller 10 determines in step S20 that the call has not started (No), the controller 10 proceeds to step S20. If the controller 10 determines in step S20 that the call has been started (Yes), the orientation detection unit 15 detects the orientation, that is, the orientation of the mobile phone 1A in step S22. When the controller 10 detects the orientation in step S22, in step S24, the controller 10 performs receiver and microphone setting processing, and proceeds to step S26.

  The process of step S24 is demonstrated using FIG. In step S24, the controller 10 performs receiver and microphone setting processing based on the detected orientation of the mobile phone 1A. The controller 10 determines whether it is upward as step S40. In the present embodiment, upward refers to the direction in which the end 40a of the housing 40 is on the upper side in the vertical direction than the end 40b.

  If the controller 10 determines in step S40 that it is upward (Yes), the controller 10 selects a method (first mode) for generating the air conduction sound and the vibration sound by the piezoelectric element 7a and the panel 20 as step S42. . In step S44, the dynamic receiver 7b is stopped, and in step S46, the first microphone 8a is set as a receiving microphone. In step S48, the second microphone 8b is set as a noise-cancelling microphone, and this process ends. After completing this process, the controller 10 proceeds to step S26.

  The controller 10 generates the air conduction sound and the vibration sound by the piezoelectric element 7a and the panel 20 by executing the processing from step S42 to step S48, and is arranged on the opposite side to the piezoelectric element 7a. A call is executed using one microphone 8a as a microphone. The controller 10 uses the sound detected by the second microphone 8b disposed in the vicinity of the piezoelectric element 7a for noise cancellation.

  If the controller 10 determines in step S40 that it is not upward (No), the controller 10 sets the dynamic receiver 7b as a call receiver (second mode) in step S52. In step S54, the application of the electric signal to the piezoelectric element 7a is stopped, and in step S56, the second microphone 8b is set as a receiving microphone. In step S58, the first microphone 8a is set as a noise-cancelling microphone, and this process ends. After completing this process, the controller 10 proceeds to step S26.

  By executing the processing from step S52 to step S58, the controller 10 performs a call using the dynamic receiver 7b as a receiver and the second microphone 8b disposed on the opposite side of the dynamic receiver 7b as a microphone. The controller 10 uses the sound detected by the first microphone 8a disposed in the vicinity of the dynamic receiver 7b for noise cancellation.

  After executing the setting process shown in FIG. 9 in step S24, the controller 10 processes the call voice based on the executed setting in parallel with the process shown in FIG. After executing the setting process in step S24, the controller 10 determines whether or not the call is ended in step S26.

  If the controller 10 determines in step S26 that the call has not ended (No), the orientation detection unit 15 detects the orientation as step S28, and determines whether there is a change in orientation as step S30. That is, the controller 10 determines whether the direction has been changed from upward to downward or from downward to upward.

  If the controller 10 determines in step S30 that there is no change in orientation (No), that is, the controller 10 determines that the orientation is the same as the current setting, the controller 10 proceeds to step S26. If the controller 10 determines in step S30 that the orientation has been changed (Yes), that is, if the controller 10 determines that the orientation is different from the current setting, the controller 10 proceeds to step S24 and executes receiver and microphone setting processing.

  If the controller 10 determines in step S26 that the call has ended (Yes), the process ends.

  As shown in FIGS. 8 and 9, the cellular phone 1 </ b> A has a first mode in which the air conduction sound and the vibration sound are generated by the piezoelectric element 7 a and the panel 20 according to the setting from step S <b> 42 to step S <b> 48, and from step S <b> 52. It is possible to make a call in two modes: the second mode in which the dynamic receiver 7b is used as the call receiver by the setting in step S58. Thereby, the user can switch the receiver to be used according to the surrounding environment and application. For example, if the user is noisy and the sound is output from the dynamic receiver 7b and is difficult to hear due to the surrounding noise, the user can listen to the voice of the call suitably even in a noisy environment by outputting the sound in the first mode. Can do. When the environment is quiet, the user can appropriately suppress sound leakage by outputting sound at an appropriate volume in the second mode. In other words, the user can suppress the sound from being transmitted to the position farther than the user's ear by the air conduction method by outputting the sound of the appropriate volume to the ear from the dynamic receiver 7b in the second mode. it can. Thereby, sound leakage can be suppressed.

  The mobile phone 1A switches between performing a call in the first mode and performing a call in the second mode based on the orientation of the mobile phone 1A. Thus, the user can easily switch the mode for outputting the sound by changing the direction of the mobile phone 1A.

  In the mobile phone 1A, the first microphone 8a and the second microphone 8b are arranged around the piezoelectric element 7a and the dynamic receiver 7b, respectively, so that one microphone is used as a call microphone and the other microphone is subjected to noise cancellation. It can be used as a microphone. Thereby, the mobile phone 1A can perform noise cancellation and make a call in both the first mode and the second mode.

  In the mobile phone 1A, the piezoelectric element 7a and the dynamic receiver 7b are arranged at the opposite ends of the casing 40, and the first microphone 8a and the second microphone 8b are arranged at the opposite ends of the casing 40. In either case of the first mode or the second mode, the receiver and the microphone can be suitably switched.

  The mobile phone 1A preferably performs the setting process of the first mode and the second mode during a call as in the present embodiment. As a result, processing can be selectively executed when necessary, and power consumption can be reduced.

  The mobile phone 1A is preferably used as a speaker when the dynamic receiver 7b is not used as a receiver. Accordingly, the mobile phone 1A can realize the function of a receiver that outputs sound by an air conduction method and the function of a speaker that notifies a ring tone and the like with one dynamic receiver 7b. Accordingly, the mobile phone 1A can install a plurality of output type receivers without increasing the number of devices to be mounted.

  Here, in FIG. 8, the start of the call is used as a trigger. However, it may be set as a trigger for starting the processing after step S <b> 22 whether there is an outgoing call or an incoming call.

  The mobile phone 1 </ b> A may consider other conditions when determining the direction switching. Hereinafter, a description will be given with reference to FIG. The controller 10 can execute the process of FIG. 10 instead of the process of step S28 of FIG.

  In step S60, the controller 10 detects the orientation by the posture detection unit 15, and in step S62, compares the orientation with a reference orientation corresponding to the current setting. After performing the comparison in step S62, the controller 10 determines whether the angle formed with the reference direction is equal to or greater than the threshold value in step S64. That is, the controller 10 detects an angle formed by the reference direction and the direction detected in step S60 as step S64. Here, the formed angle is an angle between the reference direction in the plane passing through the vertical direction and the direction detected in step S60.

  If the controller 10 determines that the angle formed in step S64 is not greater than or equal to the threshold (No), the controller 10 proceeds to step S68. When it is determined that the angle formed in step S64 is equal to or greater than the threshold (Yes), the controller 10 determines in step S66 whether there is a switching prohibition operation. Here, the switch prohibiting operation is an operation for prohibiting the mode switching of the voice output during a call. For example, there are pressing of a predetermined button, setting input in advance, and the like. If it is determined in step S66 that there is an operation (Yes), the controller 10 proceeds to step S68. If it is determined in step S66 that there is no operation (No), the controller 10 proceeds to step S70.

  When it is determined No in step S64 or Yes in step S66, the controller 10 determines that there is no change in direction as step S68, and ends this process. If the controller 10 determines No in step S66, it determines that there is a change in direction in step S70, specifies the direction changed in step S72, that is, the current direction after the change, and performs this process. finish.

  As shown in FIG. 10, the mobile phone 1 </ b> A can adjust the ease of switching the voice output mode during a call by providing a threshold value as a reference for determining that the orientation has changed. Here, the controller 10 preferably sets the threshold to an angle larger than 90 degrees, more preferably an angle larger than 135 degrees. Thereby, it is possible to make it difficult to switch the current mode, and it is possible to prevent the mode from being switched at a timing not intended by the user during use. That is, it is possible to provide a posture that becomes a constant buffer region for the mode switching posture. The mobile phone 1 </ b> A may set different angles for the threshold value for switching from the first mode to the second mode and the threshold value for switching from the second mode to the first mode. Thereby, mode switching according to a user's intention is realizable.

  When an operation for prohibiting switching is input, the mobile phone 1A can continue outputting sound in the mode intended by the user by not switching the sound output mode. For example, when the user is talking while sleeping, it is possible to prevent the mode from being switched by simply turning over.

  The mobile phone 1 </ b> A may determine that the orientation has changed when the state in which the orientation is changed continues for a certain time or more, or if the change in angle is small with the orientation being changed, It may be determined that there is a change. Further, the mobile phone 1A may use the acceleration when the orientation changes as a criterion for determination.

(Embodiment 2)
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 panel 20. FIG. 11 is a front view of the mobile phone according to the second embodiment. 12 is a cross-sectional view taken along line cc of the mobile phone shown in FIG. A mobile phone 1B arranged so that the touch screen 21 does not overlap the panel 20 will be described with reference to FIGS.

  As shown in FIGS. 11 and 12, in the mobile phone 1 </ b> B, 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 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 a is attached to the substantially center of the back surface of the panel 20 by a joining member 30. When an electrical signal is applied to the piezoelectric element 7a, the panel 20 vibrates in accordance with the deformation (expansion / contraction or bending) of the piezoelectric element 7a, and air conduction sound and a part of the human body that contacts the panel 20 (for example, an ear) Air conduction sound and vibration sound transmitted through the interchondral cartilage are generated. By disposing the piezoelectric element 7a in the center of the panel 20, the vibration of the piezoelectric element 7a 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.

  Even when the panel 20 is arranged so as not to overlap the touch screen 21 as in the cellular phone 1B, the dynamic receiver 7b is provided at the opposite end of the piezoelectric element 7a in the two modes as described above. Audio can be output, and audio can be output in a manner suitable for the user.

(Embodiment 3)
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. 13 is a front view of the mobile phone according to the third embodiment. 14 is a cross-sectional view taken along the line dd of the mobile phone shown in FIG. A mobile phone 1 </ b> C disposed so that the touch screen 21 does not overlap the panel 20 will be described with reference to FIGS. 13 and 14.

  As shown in FIGS. 13 and 14, 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 a is attached to the substantially 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 7a. The reinforcing plate 31 is a plate including, for example, a resin plate, sheet metal, or glass fiber. That is, in the mobile phone 1 </ b> C, the piezoelectric element 7 a 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 piezoelectric element 7a may not be provided at the center of the panel 20.

  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 7a 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 7a and the piezoelectric element 7a 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 7a is reduced. As a result, damage to the piezoelectric element 7a can be reduced. When the reinforcing member 31 is disposed between the piezoelectric element 7a 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 7a to cause the piezoelectric element. The possibility of breakage of 7a can be reduced.

  Vibration due to expansion / contraction or bending of the piezoelectric element 7 a is first transmitted to the reinforcing member 31 and further transmitted to the panel 20. That is, the piezoelectric element 7a first vibrates the reinforcing member 31 having a larger elastic coefficient than the piezoelectric element 7a, and further vibrates the panel 20. Therefore, the cellular phone 1C does not include the reinforcing member 31 and can make the deformation of the piezoelectric element 7 less likely to be excessive as compared with a structure in which the piezoelectric element 7a is joined to the panel 20 by the joining 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 does not easily disturb the deformation of the piezoelectric element 7a.

  Furthermore, by disposing the reinforcing member 31 between the piezoelectric element 7a and the panel 20, as shown in FIG. 15, the resonance frequency of the panel 20 is lowered and the acoustic characteristics in the low frequency band are improved. FIG. 15 is a diagram illustrating an example of a change in frequency characteristics due to the reinforcing member 31. FIG. 15 shows frequency characteristics when a sheet metal such as SUS304 is used as the reinforcing member 31 and frequency characteristics 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 a by the joining member 30.

  When an electrical signal is applied to the piezoelectric element 7a, the panel 20 vibrates in accordance with the deformation (expansion / contraction or bending) of the piezoelectric element 7a, 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.

  Similarly to the above, in the cellular phone 1C, the dynamic receiver 7b is disposed at the end opposite to the end 40a where the piezoelectric element 7a is disposed. The first microphone 8a is disposed in the vicinity of the dynamic receiver 7b. The second microphone 8b is disposed in the vicinity of the piezoelectric element 7a.

  Even in the case of the mobile phone 1C, by providing the dynamic receiver 7b at the opposite end of the piezoelectric element 7a, it is possible to output sound in two modes as described above, and the sound can be output in a manner suitable for the user. Can be output.

(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. 7 may be divided into a plurality of modules, or may be combined with other programs.

  In the said embodiment, although the piezoelectric element 7a and the dynamic receiver 7b were arrange | positioned at the edge part of the one side of the housing | casing 40, and the edge part of the other side, it is not limited to this. In the mobile phone, the piezoelectric element 7a and the dynamic receiver 7b may be disposed in the vicinity.

  In the said embodiment, although microphone 8a, 8b was each arrange | positioned in the vicinity of the piezoelectric element 7a and the dynamic receiver 7b, it is not limited to this. The mobile phone may use the same microphone as a call microphone. In this case, the mobile phone may have a structure including only one microphone, but may include another microphone used for noise cancellation in either the first mode or the second mode. In the above embodiment, the first microphone 8a and the second microphone 8b may not be used for noise cancellation.

  In the above embodiment, the piezoelectric element 7a and the dynamic receiver 7b are disposed in the vicinity of the end portion in the longitudinal direction of the housing 40, but the present invention is not limited to this. The piezoelectric element 7a and the dynamic receiver 7b may be disposed in the vicinity of both ends in the short direction of the housing 40. When the casing 40 is not rectangular but square, it may be disposed in the vicinity of the opposite ends.

  In the above embodiment, the first microphone 8a and the second microphone 8b are arranged at diagonal positions on the main surface of the housing, but are not limited thereto. For example, the first microphone 8a and the second microphone 8b may be arranged on the same end side in the short side direction of one surface of the housing 40, respectively.

  In the above embodiment, whether to execute the first mode or the second mode is determined based on the orientation of the mobile phone, but the present invention is not limited to this. The mobile phone may determine the mode based on control conditions other than orientation. For example, the mobile phone may determine whether to execute the first mode or the second mode based on voice or an input operation.

  The mobile phone may detect the shape or orientation and position of the ear on the touch screen 21 and determine whether to execute the first mode or the second mode based on the shape or orientation and position of the ear. For example, the mobile phone may determine the mode to output sound using the receiver with the ear facing upward.

  Here, an example is shown in which the shape, orientation, and position of the ear that contacts the panel 20 are detected using the touch screen 21, but 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 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-described embodiment, the example in which the piezoelectric element 7a is attached to the panel 20 has been described. For example, the piezoelectric element 7a 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 mobile phone may be configured such that the piezoelectric element 7a vibrates corners (for example, at least one of the four corners) of the housing 40. In this case, the piezoelectric element 7a may be configured to be attached to the inner surface of the corner portion of the housing 40, or may further include an intermediate member, and the vibration of the piezoelectric element 7a may be 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. The reinforcing member 31 may have, for example, a shape that is larger than the piezoelectric element 7a and whose end is curved toward the piezoelectric element 7a and covers the side of the piezoelectric element 7a. 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 7a. In this case, it is preferable that the extending portion and the side portion of the piezoelectric element 7a 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 7a 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 7a, 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.

  In the above embodiment, the controller of the mobile phone controls the generation of sound, but is not limited to this. For example, sound generation may be controlled based on an instruction signal received via a network by a communication unit. For example, a signal may be received from another electronic device by so-called near field communication such as Bluetooth (registered trademark) or infrared communication, and sound generation may be controlled based on the received signal.

  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 7a Piezoelectric element 7b Dynamic receiver 8a First microphone 8b Second microphone 9 Storage 9A Control program 9B Call application 9C Music playback application 9D Video playback application 9Z Setting Data 10 Controller 12 Camera 15 Posture detection unit 18 Vibrator 20 Panel 21 Touch screen 30 Joining member 31 Reinforcing member 40 Housing

Claims (15)

A housing,
A piezoelectric element;
A first 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 second sound generator;
An attitude detection unit,
The first sound generation unit or the second sound generation unit is an electronic device that generates sound based on a detection result of the posture detection unit.   The electronic device according to claim 1, wherein the first sound generation unit generates a sound when the piezoelectric element is vertically above the second sound generation unit.   2. The electronic device according to claim 1, wherein the second sound generation unit generates a sound when the second sound generation unit is located above the piezoelectric element in the vertical direction. It further has a communication unit for performing voice communication,
4. The electronic device according to claim 1, wherein one of the first sound generation unit and the second sound generation unit generates a sound during a call using the communication unit. 5. The piezoelectric element is disposed in the vicinity of one end in the long side direction of the housing,
5. The electronic device according to claim 1, wherein the second sound generation unit is disposed in the vicinity of the other end in the long side direction of the housing. A first microphone disposed in the vicinity of the other end in the long side direction of the housing;
A second microphone disposed in the vicinity of one end in the long side direction of the housing;
When sound is generated by the first sound generating unit, the first microphone is used as a microphone for the voice call and the second microphone is used as a noise canceling microphone, and sound is generated by the second sound generating unit. The electronic device according to claim 5, wherein the second microphone is a microphone for the voice call and the first microphone is a microphone used for noise cancellation.   The electronic device according to claim 1, wherein the first sound generation unit is a panel. The panel is disposed on the main surface of the housing,
In the first microphone and the second microphone, a microphone main body that detects sound is disposed inside the housing,
The electronic device according to claim 7, wherein a microphone hole that communicates a space in which the first microphone or the second microphone is disposed and an external space of the housing is formed on a surface different from the main surface. machine.   The panel vibrates in 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 7 or 8.   The electronic device according to any one of claims 7 to 9, wherein the panel constitutes a part or all of a display panel, an operation panel, a cover panel, and a lid panel for making a rechargeable battery removable. . When the panel is a display panel,
The electronic device according to claim 10, wherein the piezoelectric element is disposed outside a display area for the display function.   The electronic device according to any one of claims 7 to 11, wherein the panel is deformed to transmit air conduction sound and human body vibration sound in any part of the panel.   The panel has a plurality of locations that vibrate in a direction intersecting with the main surface of the panel in the vibration region, and the amplitude value of the vibration is increased from plus to minus with time or vice versa at each location. The electronic device according to any one of claims 7 to 12, which fluctuates. A piezoelectric element, a first sound generating section that generates vibration sound that is transmitted by vibrating by the piezoelectric element and vibrating part of the human body, a second sound generating section, and a posture detecting section. A control method executed by an electronic device comprising:
Determining to generate sound from the first sound generation unit or the second sound generation unit based on a detection result of the posture detection unit;
Generating sound from the determined first sound generation unit or the second sound generation unit;
Control method. A piezoelectric element, a first sound generating section that generates vibration sound that is transmitted by vibrating by the piezoelectric element and vibrating part of the human body, a second sound generating section, and a posture detecting section. In the electronic equipment provided,
Determining to generate sound from the first sound generation unit or the second sound generation unit based on a detection result of the posture detection unit;
Generating sound from the determined first sound generation unit or the second sound generation unit;
Control program to execute

Images