WO2015064112A1 - 電子機器 - Google Patents
電子機器 Download PDFInfo
- Publication number
- WO2015064112A1 WO2015064112A1 PCT/JP2014/005520 JP2014005520W WO2015064112A1 WO 2015064112 A1 WO2015064112 A1 WO 2015064112A1 JP 2014005520 W JP2014005520 W JP 2014005520W WO 2015064112 A1 WO2015064112 A1 WO 2015064112A1
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- WO
- WIPO (PCT)
- Prior art keywords
- panel
- piezoelectric element
- electronic device
- main surface
- housing
- Prior art date
Links
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Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
- H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2047—Membrane type
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2047—Membrane type
- H10N30/2048—Membrane type having non-planar shape
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
- H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
Definitions
- the present invention relates to an electronic device that transmits a sound to a user by vibrating a panel by applying a predetermined electric signal to a piezoelectric element and transmitting the vibration of the panel to a human body.
- Patent Document 1 in an electronic device such as a mobile phone terminal, a piezoelectric element is attached to a main surface of a panel in the electronic device, and the panel is vibrated due to deformation of the piezoelectric element, thereby contacting the panel.
- the thing which conveys the human body vibration sound to the thing is described.
- Patent Document 1 describes that human body vibration sound is sound transmitted to the user's auditory nerve through a part of the user's body (for example, the cartilage of the outer ear) that contacts the vibrating object. ing.
- Patent Document 1 requires a space for disposing the piezoelectric elements on the main surface of the panel, leading to an increase in the size of the panel.
- An object of the present invention is to provide an electronic device in which a piezoelectric element is arranged that can reduce the size of a panel.
- An electronic apparatus includes a panel, a housing that holds the panel, and a piezoelectric element attached to the panel, and the panel vibrates due to deformation of the piezoelectric element, It transmits human body vibration sound to an object in contact with the panel, and a perpendicular to the main surface of the panel and a virtual plane including the main surface of the piezoelectric element are not orthogonal to each other.
- the panel may have at least a curved portion or a bent portion.
- the panel may have the curved portion or the bent portion at one end of the main surface of the panel, and may have a second surface extending from the curved portion or the bent portion.
- the piezoelectric element may be attached to the curved portion or the bent portion.
- the piezoelectric element may be attached to the second surface.
- the end of the panel on the side where the piezoelectric element is attached may be joined to the housing, so that the end may be a fixed end.
- An electronic apparatus includes a panel, a display unit, a housing that holds the panel and the display unit, and a piezoelectric element attached to the panel, and is caused by deformation of the piezoelectric element.
- the panel vibrates and transmits a human body vibration sound to an object in contact with the panel, and a perpendicular to the main surface of the display unit and a virtual plane including the main surface of the piezoelectric element are not orthogonal to each other. Is.
- the panel may have a region that is not perpendicular to the perpendicular to the main surface of the display unit immediately above the display unit.
- the panel may have a polyhedral shape or a curved shape.
- the electronic device includes a housing, a panel attached to the housing, and a piezoelectric element attached to the panel, and the panel vibrates due to deformation of the piezoelectric element. And transmitting a human body vibration sound to an object in contact with the panel, and when the panel is separated from the housing and placed on a horizontal plane, the virtual plane includes the horizontal plane and the main surface of the piezoelectric element. The plane intersects at a predetermined angle.
- the panel has a projecting curved surface in which an intermediate region protrudes from both end portions in a predetermined cross section of the panel, and is placed on a horizontal plane with the intermediate region facing up from the both end portions of the panel.
- the horizontal plane and a virtual plane including the main surface of the piezoelectric element may intersect at a predetermined angle.
- the panel may have a convex curved shape.
- the panel may have a concave curved shape.
- At least a part of the housing may have a convex curved shape.
- At least a part of the housing may have a concave curved shape.
- FIG. 2B is a sectional view taken along line bb in FIG. 2A. It is a figure which shows the structure of the electronic device which concerns on embodiment of this invention, and the conventional electronic device. It is a figure which shows the 1st modification of embodiment of this invention. It is a figure which shows the 2nd modification of embodiment of this invention. It is a figure which shows the 3rd modification of embodiment of this invention. It is a figure which shows the 4th modification of embodiment of this invention. It is a figure which shows the 5th modification of embodiment of this invention.
- FIG. 9B is a cross-sectional view of the panel of FIG. 9A. It is a front view of the electronic device which concerns on the further another Example of this invention. It is the figure which illustrated the shape of the panel of FIG. 10A. It is the figure which illustrated the shape of the panel of FIG. 10A.
- FIG. 1 is a diagram showing functional blocks of an electronic device 1 according to an embodiment of the present invention.
- the electronic device 1 is, for example, a mobile phone (smart phone), and includes a panel 10, a display unit 20, a piezoelectric element 30, an input unit 40, and a control unit 50.
- the panel 10 is formed of synthetic resin such as glass or acrylic, for example.
- the panel 10 is a touch panel, the touch of a user's finger, pen, stylus pen, or the like is detected.
- a detection method of the touch panel an arbitrary method such as a capacitance method, a resistance film method, a surface acoustic wave method (or an ultrasonic method), an infrared method, an electromagnetic induction method, a load detection method, or the like can be used.
- the display unit 20 is a display device such as a liquid crystal display, an organic EL display, or an inorganic EL display.
- the display unit 20 is provided on the back surface of the panel 10.
- the display part 20 is arrange
- the display unit 20 may be disposed apart from the panel 10 and supported by the housing of the electronic device 1.
- the piezoelectric element 30 is an element that expands and contracts or bends according to an electromechanical coupling coefficient of a constituent material by applying an electric signal (voltage).
- the piezoelectric element 30 may be a unimorph, bimorph, or multilayer piezoelectric element.
- the stacked piezoelectric element includes a stacked bimorph element in which bimorphs are stacked (for example, 16 layers or 24 layers are stacked).
- the multilayer piezoelectric element is composed of a multilayer structure including a plurality of dielectric layers made of, for example, PZT (lead zirconate titanate) and electrode layers disposed between the plurality of dielectric layers.
- PZT lead zirconate titanate
- the input unit 40 receives an operation input from the user, and includes, for example, an operation button (operation key).
- an operation button operation key
- the panel 10 can also accept the operation input from a user by detecting the contact from a user.
- the control unit 50 is a processor that controls the electronic device 1.
- the controller 50 applies a predetermined electrical signal (voltage corresponding to the audio signal) to the piezoelectric element 30.
- the voltage applied to the piezoelectric element 30 by the control unit 50 is, for example, ⁇ 15 V, which is higher than ⁇ 5 V, which is an applied voltage of a so-called panel speaker for the purpose of conducting sound by air conduction sound instead of human body vibration sound. It's okay. Accordingly, even when the user presses the panel 10 against his / her body with a force of 3N or more (for example, a force of 5N to 10N), for example, sufficient vibration is generated in the panel 10 and the user's body A human body vibration sound can be generated through a part.
- the control unit 50 applies an electrical signal to the piezoelectric element 30, the piezoelectric element 30 causes a deflection displacement in the thickness direction.
- the panel 10 to which the piezoelectric element 30 is attached is deformed in accordance with the displacement of the piezoelectric element 30, and the panel 10 vibrates. For this reason, the panel 10 generates air conduction sound.
- the panel 10 transmits a human body vibration sound to an object in contact with the panel 10. Examples of the object include a part of the user's body (such as cartilage in the outer ear).
- control unit 50 can apply an electric signal corresponding to a voice signal related to the voice of the other party to the piezoelectric element 30 and generate air conduction sound and human body vibration sound corresponding to the voice signal.
- the audio signal may be related to an incoming melody or a music piece including music. Note that the audio signal applied to the electrical signal may be based on music data stored in the internal memory of the electronic device 1, or music data stored in an external server or the like is reproduced via a network. May be.
- FIGS. 2A and 2B are diagrams showing the structure of the electronic apparatus 1 according to the embodiment of the present invention.
- 2A is a front view of the electronic device 1
- FIG. 2B is a cross-sectional view in the direction along the long side (bb line) of the electronic device 1 of FIG. 2A.
- An electronic device 1 shown in FIGS. 2A and 2B is a substantially rectangular smartphone in which a touch panel is arranged as a panel 10 on the front surface of the electronic device 1.
- the panel 10 and the input unit 40 are supported by a housing 60, and the display unit 20 and the piezoelectric element 30 are bonded to the panel 10 by a bonding member 70, respectively.
- the display unit 20 and the piezoelectric element 30 are substantially rectangular.
- the panel 10 is partially curved.
- the panel 10 has a substantially rectangular main surface portion 101 (first surface) constituting the front surface of the electronic device 1, and an end portion on one side in a direction along the long side of the main surface portion 101. It has a curved portion 102 extending from the (upper side of the electronic device 1) toward the back of the electronic device 1. Further, the curved portion 102 may be formed from an end portion on the lower side instead of the upper portion side of the main surface portion 101, or may be formed from an end portion in a direction along the short side of the main surface portion 101. Furthermore, the curved portion 102 may be formed from a plurality of ends of the four sides of the main surface portion 101 of the panel 10. Furthermore, the curved portion 102 of the panel 10 may extend from the end portion of the main surface portion 101 in a direction away from the back surface of the electronic device 1, not in a direction approaching the back surface of the electronic device 1.
- the panel 10 is held by the housing 60.
- the edge of the main surface of the panel 10 and / or the side surface of the panel 10 is joined to the housing 60 by the joining member 70 in the present embodiment.
- the joining member 70 is an adhesive or double-sided tape having thermosetting property or ultraviolet curing property, and may be, for example, an optical elastic resin that is a colorless and transparent acrylic ultraviolet curing adhesive. Further, the joining member 70 may also serve as a waterproof tape for enabling a waterproof structure of the electronic device 1.
- the piezoelectric element 30 is attached to a surface on the inner side of the electronic device 1 in the curved portion 102 of the panel 10 by a joining member 70.
- attaching the piezoelectric element 30 to the bending portion 102 includes attaching the piezoelectric element 30 via the bonding member 70 between the bending portion 102 and the piezoelectric element 30.
- an intermediate member or the like is interposed between the piezoelectric element 30 and the bending portion 102 and the piezoelectric element 30 is attached.
- the piezoelectric element 30 is attached to the curved portion 102 of the panel 10 by the joining member 70.
- an adhesive having temporary fluidity such as an ultraviolet curable resin may be solidified in a gap generated between the curved portion 102 and the piezoelectric element 30.
- the piezoelectric element 30 is attached to the bending portion 102 without generating a gap between the bending portion 102 of the panel 10, so that the vibration of the piezoelectric element 30 can be easily transmitted to the panel 10. it can.
- the entire area of the predetermined surface of the piezoelectric element 30 does not have to be attached to the panel 10 and it is sufficient that both end portions of the predetermined surface are attached to the panel 10.
- the piezoelectric element 30 can be attached to the bending portion 102 using a double-sided tape. Further, by processing the surface on the inner side of the electronic device 1 in the bending portion 102 of the panel 10 so as to be a flat surface, the piezoelectric element 30 can be easily attached to the bending portion 102.
- the piezoelectric element 30 has a main surface of the piezoelectric element 30 attached to the curved portion 102 of the panel 10. Since the bending portion 102 of the panel 10 is not parallel to the main surface portion 101, the main surface of the piezoelectric element 30 attached to the bending portion 102 is not parallel to the main surface portion 101 as well. In other words, the piezoelectric element 30 is arranged so that the perpendicular H to the main surface portion 101 of the panel 10 and the virtual plane P including the main surface of the piezoelectric element 30 do not intersect at right angles.
- FIG. 3 is a cross-sectional view showing a detailed configuration of the electronic apparatus according to the embodiment of the present invention.
- FIG. 3 shows a case where, in the electronic device 1 according to the present invention, the main surface portion 101 of the panel 10 is assumed to be a horizontal plane, and a short side of the main surface of the piezoelectric element 30 (ie, a surface attached to the panel 10) is projected onto the horizontal plane. It is the figure which showed width
- the width of the piezoelectric element 30 when the length of the short side of the main surface of the piezoelectric element 30 is T and the angle between the virtual plane P including the main surface of the piezoelectric element 30 and the main surface portion 101 of the panel 10 is ⁇ .
- the width d of the piezoelectric element 30 indicates an area occupied by the piezoelectric element 30 in the dimension along the long side of the main surface of the electronic device 1.
- the virtual plane P including the main surface of the piezoelectric element 30 is not orthogonal to the perpendicular H to the main surface portion 101 of the panel 10. Therefore, the angle ⁇ formed by the virtual plane P including the main surface of the piezoelectric element 30 and the main surface portion 101 of the panel 10 is ⁇ ⁇ 0, and therefore d ⁇ T.
- the virtual plane including the main surface of the piezoelectric element 30 is included.
- the width d of the piezoelectric element 30 in the electronic device 1 according to the present embodiment is such that the piezoelectric element 30 is attached to the main surface portion 101 of the panel 10 including only the main surface portion 101. It becomes smaller than the width d0.
- the electronic device 1 since the piezoelectric element 30 is attached to the curved portion 102 of the panel 10, the electronic device 1 is compared with the case where the piezoelectric element 30 is attached to the main surface portion 101. Since the area occupied by the piezoelectric element 30 in the dimension along the long side of the main surface is small, the electronic device 1 can be downsized.
- a light-shielding film is printed on an area of the panel where the piezoelectric element can be visually recognized in order to prevent the piezoelectric element from being visually recognized by a user. Since the electronic device 1 according to the present invention can reduce the region occupied by the piezoelectric element 30 in the main surface portion 101 of the electronic device 1, the region where the light shielding film is provided can be reduced.
- the above effect can be obtained by arranging the piezoelectric element 30 so that the virtual plane including the main surface of the piezoelectric element 30 is not perpendicular to the perpendicular to the main surface portion 101 of the panel 10, but as in this embodiment, By using the panel 10 having a curved portion in part and attaching a piezoelectric element to the curved portion, such a piezoelectric element can be easily arranged.
- the panel 10 vibrates due to deformation of the piezoelectric element 30 attached to the panel 10, and air conduction sound is generated with respect to an object that contacts the vibrating panel 10.
- Tells human body vibration sound The bending portion 102 of the panel 10 vibrates in a direction intersecting with the bending portion 102 due to the deformation of the piezoelectric element 30.
- the vibration of the bending portion 102 of the panel 10 is also propagated to the main surface portion 101 integrated with the bending portion 102. Therefore, the electronic device 1 can transmit the human body vibration sound in any of the main surface portion 101 and the curved portion 102 of the panel 10.
- the electronic device 1 when the electronic device 1 outputs a sound having a volume equivalent to that of a conventional dynamic receiver, the sound transmitted to the surroundings of the electronic device 1 due to the vibration of air due to the vibration of the panel 10 is less than that of the dynamic receiver. For example, it is suitable for listening to recorded messages on the train.
- the electronic device 1 does not include a separate dynamic receiver, it is not necessary to form an opening (sound emission port) for sound transmission in the housing, and the waterproof structure of the electronic device 1 can be simplified.
- the sound emission port is preferably closed by a member that allows gas to pass but not liquid.
- a member that allows gas to pass but not liquid is Gore-Tex (registered trademark).
- FIG. 4 is a diagram showing a first modification of the embodiment of the present invention.
- the panel 10 of the electronic device 1 has a substantially rectangular main surface portion 101 that constitutes the front surface of the electronic device 1, and one end portion in the direction along the long side of the main surface portion 101 (upper side of the electronic device). And a bent portion 103 that is bent toward the back surface side of the electronic device 1 at a predetermined angle with respect to the main surface portion 101.
- the end of the bent portion 103 is joined to the housing 60 by the joining member 70 and constitutes a part of the side surface on the upper side of the electronic device 1.
- the bending angle etc. of the bending part 103 are set suitably.
- the bent portion 103 may be formed from an end portion on the lower side rather than the upper side of the main surface portion 101, or may be formed from an end portion in a direction along the short side of the main surface portion 101. Furthermore, the bending part 103 may be formed from the some edge part among the four sides of the main surface part 101 of the panel 10. Further, the bent portion 103 of the panel 10 may be provided by bending the end portion of the panel 10 at a predetermined angle not toward the back side of the electronic device 1 but toward the side opposite to the back side of the electronic device 1. good.
- the piezoelectric element 30 is attached to the inner surface of the electronic device 1 in the bent portion 103 of the panel 10 with an adhesive (joining member 70).
- an adhesive joining member 70.
- the main surface of the piezoelectric elements 30 is not parallel to the main surface portion 101 of the panel 10.
- the piezoelectric element 30 is arranged so that the perpendicular H to the main surface of the panel 10 and the virtual plane P including the main surface of the piezoelectric element 30 do not intersect at right angles. Therefore, also in this modification, the area occupied by the piezoelectric element 30 in the dimension along the long side of the main surface of the electronic device 1 can be reduced.
- FIG. 5 is a diagram showing a second modification of the embodiment of the present invention.
- the panel 10 of the electronic device 1 has a main surface portion 101, a curved portion 102 in which one end of the main surface portion 101 is curved, and a second surface 104 on the panel extending from the curved portion 102. ing.
- the second surface 104 of the panel 10 is substantially plate-shaped and is substantially perpendicular to the main surface portion 101 of the panel 10.
- An end of the second surface 104 of the panel 10 is joined to the housing 60 by a joining member 70.
- the curved portion 102 and the second surface 104 of the panel 10 constitute a part of the side surface of the electronic device 1.
- the piezoelectric element 30 is attached to the second surface 104 of the panel 10. Since the second surface 104 is substantially perpendicular to the main surface portion 101, the main surface of the piezoelectric element 30 is also substantially perpendicular to the main surface portion 101. In this case, the area occupied by the piezoelectric element 30 in the surface area of the main surface portion 101 of the electronic device 1 is equal to the thickness width of the piezoelectric element 30. Therefore, as in the embodiment, the area occupied by the piezoelectric element 30 is smaller in the dimension along the long side of the main surface of the electronic device 1 than the conventional electronic device in which the piezoelectric element 30 is attached to the main surface portion 101. Therefore, the electronic device 1 can be downsized.
- the second surface 104 and the main surface portion 101 of the panel 10 are configured to be substantially vertical. However, this is not always necessary, and the second surface 104 and the main surface portion 101 may not be parallel. In this case, the arrangement of the piezoelectric elements 30 in the present invention can be realized.
- the electronic device 1 according to the second modified example has a configuration in which the piezoelectric element 30 is attached to the second surface 104 of the panel 10, but not the second surface 104 but the panel as in the configuration of FIG. 2. Even if it is attached to the ten curved portions 102, it is possible to achieve downsizing of the electronic device which is the object of the present invention. However, since the second surface 104 of the present modification is substantially plate-shaped, the piezoelectric element 30 can be attached more easily than when the main surface of the piezoelectric element 30 is attached to the bending portion 102.
- FIG. 6 is a diagram showing a third modification of the embodiment of the present invention.
- the panel 10 of the electronic device 1 includes a main surface portion 101, a bent portion 103 in which one end portion of the main surface portion 101 is bent, and a second surface 104 on the panel that is bent and extended. Yes.
- the second surface 104 of the panel 10 is substantially plate-shaped, and the end of the second surface 104 is joined to the housing 60 by a joining member 70.
- the second surface 104 of the panel 10 constitutes a part of the side surface of the electronic device 1.
- the main surface of the piezoelectric element 30 is attached to the second surface 104 of the panel 10. Since the second surface 104 is formed by being bent at a predetermined angle from the main surface portion 101, the main surface of the piezoelectric element 30 attached to the second surface 104 and the main surface portion 101 of the panel 10 are not parallel. . That is, the virtual plane P including the main surface of the piezoelectric element 30 is arranged so as not to be orthogonal to the perpendicular H to the main surface portion 101 of the panel 10. Accordingly, also in the present modification, the area occupied by the piezoelectric element 30 in the dimension along the long side of the main surface of the electronic device 1 is reduced, so that the electronic device 1 can be reduced in size.
- the electronic device 1 according to the third modified example has a configuration in which the piezoelectric element 30 is attached to the second surface 104 of the panel 10.
- the piezoelectric element 30 can be attached more easily than when the main surface of the piezoelectric element 30 is attached to the bent portion 103.
- the end of the panel 10 becomes a fixed end by joining the end of the panel 10 on the side where the piezoelectric element 30 is attached to the housing 60. Yes.
- the propagation of vibration to the panel 10 due to the deformation of the piezoelectric element 30 is stabilized, and generation of distortion of vibration sound can be suppressed.
- the end portion of the panel 10 on the side where the piezoelectric element 30 is attached and the housing 60 may not be joined, so that the end portion can be a free end. .
- FIG. 7 is a diagram showing a fourth modification of the embodiment of the present invention.
- FIG. 7 shows a configuration when the end of the panel 10 on the side where the piezoelectric element 30 is attached is a free end.
- the panel 10 includes a main surface portion 101 and a curved portion 102 in which an end portion of the main surface portion 101 is curved.
- the main surface portion 101 of the panel 10 and the upper portion of the electronic device 1 in the housing 60 are joined by the joining member 70, while the end portion of the bending portion 102 is not joined to the housing 60.
- the piezoelectric element 30 is attached to the curved portion 102 of the panel 10.
- the end of the panel 10 on the side where the piezoelectric element 30 is attached becomes a free end.
- the end portion of the bending portion 102 means the end surface of the bending portion 102, the side surface near the end surface, and the edge portion of the main surface of the bending portion 102, but it is essential not to join all of these portions. However, even if a joint portion is provided as appropriate, the end of the panel 10 can be a free end. On the other hand, not only the end portion of the bending portion 102 but also the entire region of the bending portion 102 may not be joined to the housing 60.
- the end of the panel 10 on the side where the piezoelectric element 30 is attached is a free end, and therefore the vibration width of the panel 10 due to the deformation of the piezoelectric element 30 is a fixed end. Compared to Therefore, a larger sound pressure can be realized.
- the panel 10 of the electronic device 1 has the plate-like main surface portion 101
- the present invention is not limited to this.
- the panel 10 may have only a curved surface portion without having a plate-like portion.
- FIG. 8 is a diagram showing a fifth modification of the embodiment of the present invention.
- FIG. 8 shows the electronic device 1 in which a dome-shaped curved panel is arranged on the front surface of the housing 60.
- the display unit 20 is not bonded to the panel 10 but is supported by the housing 60. That is, the electronic apparatus 1 according to this modification has a configuration in which the display unit 20 is separated from the panel 10 and the display unit 20 and the support unit 80 that is a part of the housing 60 are bonded by the bonding member 70. is there.
- the support part 80 is not limited to the structure as a part of the housing
- the piezoelectric element 30 is attached to the surface on the inner side of the electronic device 1 at the end of the panel 10 by a joining member 70. At this time, the piezoelectric element 30 is arranged so that the perpendicular H ′ with respect to the main surface of the display unit 20 and the virtual plane P including the main surface of the piezoelectric element 30 are not orthogonal to each other.
- the electronic device is compared with the case where the perpendicular H ′ and the virtual plane P are orthogonal, that is, compared to the case where the main surface of the display unit 20 and the main surface of the piezoelectric element 30 are parallel.
- the area occupied by the piezoelectric element 30 in the dimension along the long side of the main surface of 1 is reduced.
- the piezoelectric element 30 when the main surface of the piezoelectric element 30 and the main surface of the display unit 20 are assumed to be parallel is shown in FIG. 8 together with a dotted line, and is shown with a dotted line with the piezoelectric element 30 in this modification example.
- the difference in the area occupied on the main surface of the electronic device 1 in the piezoelectric element is indicated by an arrow.
- the fifth modification of the embodiment of the present invention can also be applied to a shape in which the panel 10 has a region immediately above the display unit 20 and not perpendicular to the normal H ′ to the main surface of the display unit 20.
- examples of the shape of the panel 10 corresponding to this include a polyhedral shape, a hemispherical shape, a semi-ellipsoidal shape, and a curved surface shape such as a shape obtained by vertically dividing a water droplet (or egg).
- FIGS. 9A and 9B are diagrams showing another embodiment of the present invention.
- 9A is a cross-sectional view of the electronic device 1
- FIG. 9B is a cross-sectional view of the panel 10 when the panel 10 is separated from the housing 60 of the electronic device 1 and placed on a horizontal plane.
- the panel 10 is attached to the housing 60.
- the panel 10 has a projecting curved surface in which an intermediate region protrudes from both end portions in a predetermined cross section of the panel 10.
- the display unit 20 is bonded and attached to the panel 10 by a bonding member 70.
- the piezoelectric element 30 is attached to the panel 10 by a bonding member 70.
- the panel 10 vibrates due to the deformation of the piezoelectric element 30, and the human body vibration sound is transmitted to the object in contact with the panel 10.
- illustration of the input part 40 is abbreviate
- the panel 10 when the panel 10 is separated from the housing 60 and placed on the horizontal plane S, the horizontal plane S and the virtual plane P including the main surface of the piezoelectric element 30 have a predetermined plane. Intersect at an angle ⁇ .
- the panel 10 has a projecting curved surface in which a middle region protrudes from both ends in a predetermined cross section of the panel 10, and the middle region is located above the both ends of the panel 10. It is placed on a horizontal plane.
- the user views an image displayed from the display unit 20 of the electronic device 1 via the panel 10, the user usually looks from above the electronic device 1 in the direction H perpendicular to the horizontal plane S. The display area of the electronic device 1 is viewed.
- the surface visually recognized by the user is a surface approximately parallel to the horizontal plane S.
- the piezoelectric element 30 is attached to the panel 10 so that the virtual plane P including the main surface of the piezoelectric element 30 and the horizontal plane S intersect at a predetermined angle.
- the horizontal plane S that is, when they are parallel
- the area occupied by the piezoelectric element 30 is small in a plane parallel to the surface to be visually recognized. Therefore, for example, it is possible to reduce the area where the light shielding film for preventing the piezoelectric element 30 from being visually recognized by the user is provided.
- the panel 10 of the electronic device 1 may have a curved surface shape as described above.
- 10A, 10B, and 10C are diagrams illustrating the shape of the panel 10.
- FIG. 10A shows a front view of the electronic device 1
- FIGS. 10B and 10C show cross-sectional views of the electronic device 1 shown in FIG. 10A for each pattern of the shape of the panel 10.
- the piezoelectric element 30 is attached to at least one of the end of the panel 10 in the direction along the long side of the electronic device 1 or the end in the direction along the short side of the electronic device 1.
- FIG. 10B is a cross-sectional view of the panel 10 in the direction along the short side (XX line) of the electronic device 1 and a cross-sectional view of the panel 10 in the direction along the long side of the electronic device 1 (YY line).
- XX line short side
- YY line long side of the electronic device 1
- FIG. 10B the panel 10 is indicated by a solid line
- the housing 60 is indicated by a broken line
- the piezoelectric element 30 is indicated by a diagonal line.
- the illustration of the input unit 40 is omitted.
- the panel 10 protrudes in an intermediate region from both ends of the panel 10 in both the cross section along the XX line and the cross section along the YY line of the electronic device 1.
- the pattern 2 in FIG. 10B is a cross section along the line XX of the electronic device 1
- the pattern 3 in FIG. 10B is a cross section along the YY line of the electronic device 1.
- FIG. 10C is a diagram further illustrating another shape of the panel 10.
- the panel 10 has a convex curved shape in at least one of the cross section along the line XX of the electronic device 1 and the cross section along the line YY. .
- the pattern 1 in FIG. 10C is the same as the example shown in FIG. 10B, and shows a case where the panel 10 is axisymmetric with respect to the normal to the center of the panel 10.
- the pattern 2 in FIG. 10C shows a case where the panel 10 is asymmetric with respect to the normal to the center of the panel 10.
- Such a shape of the panel 10 is, for example, a shape in which a water droplet (or an egg or the like) is vertically divided into two.
- a water droplet or an egg or the like
- the panel 10 has a flat plate shape
- the electronic device 1 when the electronic device 1 is placed so that the panel 10 is brought into contact with a predetermined flat surface, for example, light emitted from the display unit 20 due to notification or the like is emitted to the outside. It does not leak and is difficult to see.
- the panel 10 has a convex curved shape, a gap is formed between the curved surface of the panel 10 and the flat surface even if the panel 10 is placed on the flat surface with the panel 10 facing down, so the display unit 20 The light emitted by is easy to leak out and easily visible.
- each of the patterns 3 and 4 in FIG. 10C shows a case where the housing 60 has a curved surface shape along the curved surface shape of the panel 10 in each of the patterns 1 and 2 in FIG. 10C.
- the housing 60 has a concave curved shape.
- the piezoelectric element 30 When the piezoelectric element 30 is attached to the back surface (housing 60) of the electronic device 1 and a call voice is heard through vibration of the housing 60, the user places the back surface of the electronic device 1 on the side of the head.
- the concave surface is easy to fit in the user's temporal region, which improves usability.
- FIG. 10C shows the case where the panel 10 has a convex curved shape, but is not limited to this.
- Patterns 5 to 8 in FIG. 10C show the case where the panel 10 has a concave curved shape in at least one of the cross section along the line XX of the electronic apparatus 1 and the cross section along the line YY. .
- a pattern 5 in FIG. 10C shows a case where the panel 10 is line-symmetric with respect to a normal line with respect to the central portion of the panel 10, and a pattern 6 in FIG. 10C shows that the panel 10 is in the central portion of the panel 10. The case where it becomes asymmetrical about the normal line with respect to is shown.
- the panel 10 Since the panel 10 has a concave curved shape, the user touches the panel 10 of the electronic device 1 against the side of the head when listening to the call voice through the human body vibration sound caused by the vibration of the panel 10.
- the 10 concave surfaces are easy to fit in the user's temporal region, and usability is improved as compared with the case where the panel 10 has a flat plate shape.
- the patterns 5 and 6 in FIG. 10C the case where the surface constituting the back surface of the electronic device 1 in the housing 60 is a flat surface is shown, but the present invention is not limited to this.
- Each of the patterns 7 and 8 in FIG. 10C shows a case where the housing 60 has a curved surface shape along the curved surface shape of the panel 10 in each of the patterns 5 and 6 in FIG. 10C.
- At least a part of the housing 60 for example, a surface constituting the back surface of the electronic device 1 in the housing 60 has a convex curved shape.
- at least a part of the housing 60 for example, the surface constituting the back surface of the electronic device 1 in the housing 60 has a convex curved shape. Easy to pack and easy to use.
- the virtual plane including the main surface of the piezoelectric element 30 is arranged so as not to be orthogonal to the perpendicular to the main surface of the electronic device 1, and thus a curved surface portion such as a curved portion is partially provided.
- the curved panel which has is used the shape of a panel is not limited to this.
- the intermediate member may be a hard plastic such as polyethylene, or may be an elastic polymer such as rubber or silicone.
- an adhesive or the like used as the joining member 70 may also serve as the intermediate member.
- a hard plastic is used, the vibration of the piezoelectric element is easily propagated to the panel.
- an elastic polymer when an external force is applied to the electronic device 1 from the outside, the external force applied to the piezoelectric element is reduced. Propagation can be mitigated.
- the virtual plane including the main surface of the piezoelectric element 30 is the main surface portion 101 of the panel 10. That is, by making the structure not perpendicular to the perpendicular to the main surface of the electronic device 1, the area occupied by the piezoelectric element 30 in the dimension along the long side of the main surface of the electronic device 1 can be reduced.
- the present invention is not limited to this.
- the virtual plane including the main surface of the piezoelectric element 30 is configured not to be orthogonal to the main surface portion 101 of the panel 10. The area occupied by the piezoelectric element 30 in the dimension along the short side of the main surface can be reduced.
- the combination of the panel 10 having a convex curved shape and the casing 60 having a concave curved shape, or the panel 10 having a concave curved shape and the convex curved shape is shown, the present invention is not limited to this.
- the present invention in the embodiment of the present invention, the case where the thickness of the panel 10 is uniform in any region of the panel 10 is shown. However, the present invention is not limited to this, and the thickness of the panel 10 depends on the region of the panel 10. They may have different shapes.
- the embodiment of the present invention has been described by taking a smartphone as an example, but the present invention can be realized even with a foldable mobile phone.
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Abstract
Description
すなわち、圧電素子30の主面を含む仮想平面Pがパネル10の主面部101に対する垂線Hと直交しないように配置される。従って、本変形例においても、電子機器1の主面の長辺に沿った寸法において圧電素子30が占める領域が小さくなることから、電子機器1の小型化が可能である。
10 パネル
20 表示部
30 圧電素子
40 入力部
50 制御部
60 筐体
70 接合部材
80 支持部
101 主面部
102 湾曲部
103 屈曲部
104 第二の面
Claims (15)
- パネルと、
前記パネルを保持する筐体と、
前記パネルに取り付けられた圧電素子と、を有し、
前記圧電素子の変形に起因して、前記パネルが振動し、当該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記パネルの主面に対する垂線と前記圧電素子の主面を含む仮想平面とが直交しない、
ことを特徴とする電子機器。 - 前記パネルは、少なくとも湾曲部または屈曲部を有する、
ことを特徴とする請求項1に記載の電子機器。 - 前記パネルは、当該パネルの主面の一端に前記湾曲部または前記屈曲部を有し、
当該湾曲部または当該屈曲部から延設される第二の面を有する、
ことを特徴とする請求項2に記載の電子機器。 - 前記圧電素子は、前記湾曲部または前記屈曲部に取り付けられる、
ことを特徴とする請求項2に記載の電子機器。 - 前記圧電素子は、前記第二の面に取り付けられる、
ことを特徴とする請求項3に記載の電子機器。 - 前記パネルにおける、前記圧電素子が取り付けられている側の端部が前記筐体に接合されることにより、当該端部が固定端となる、
ことを特徴とする請求項1に記載の電子機器。 - パネルと、
表示部と、
前記パネルおよび前記表示部を保持する筐体と、
前記パネルに取り付けられた圧電素子と、を有し、
前記圧電素子の変形に起因して、前記パネルが振動し、当該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記表示部の主面に対する垂線と前記圧電素子の主面を含む仮想平面とが直交しない、
ことを特徴とする電子機器。 - 前記パネルは、前記表示部の直上において、当該表示部の主面に対する垂線と直交しない領域を有する、
ことを特徴とする請求項7に記載の電子機器。 - 前記パネルは、多面体形状あるいは曲面形状である、
ことを特徴とする請求項8に記載の電子機器。 - 筐体と、
前記筐体に取り付けられるパネルと、
前記パネルに取り付けられた圧電素子と、を有し、
前記圧電素子の変形に起因して、前記パネルが振動し、当該パネルに接触する対象物に人体振動音を伝える電子機器であって、
前記パネルを前記筐体から分離して水平面上に置いたときに、該水平面と前記圧電素子の主面を含む仮想平面とが所定の角度で交わる、
ことを特徴とする電子機器。 - 前記パネルは、該パネルの所定の断面において、両端部よりもその中間領域が突出する突曲面を有し、
前記パネルの前記両端部よりも前記中間領域を上にして水平面上に置いたときに、該水平面と前記圧電素子の主面を含む仮想平面とが所定の角度で交わる、
ことを特徴とする請求項10に記載の電子機器。 - 前記パネルは、凸状の湾曲形状である、
ことを特徴とする請求項10に記載の電子機器。 - 前記パネルは、凹状の湾曲形状である、
ことを特徴とする請求項10に記載の電子機器。 - 前記筐体の少なくとも一部は、凸状の湾曲形状である、
ことを特徴とする請求項12に記載の電子機器。 - 前記筐体の少なくとも一部は、凹状の湾曲形状である、
ことを特徴とする請求項13に記載の電子機器。
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US20160241689A1 (en) | 2016-08-18 |
JPWO2015064112A1 (ja) | 2017-03-09 |
US9992313B2 (en) | 2018-06-05 |
JP6364423B2 (ja) | 2018-07-25 |
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