WO2014034250A1 - 音響発生器、音響発生装置および電子機器 - Google Patents
音響発生器、音響発生装置および電子機器 Download PDFInfo
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- WO2014034250A1 WO2014034250A1 PCT/JP2013/067892 JP2013067892W WO2014034250A1 WO 2014034250 A1 WO2014034250 A1 WO 2014034250A1 JP 2013067892 W JP2013067892 W JP 2013067892W WO 2014034250 A1 WO2014034250 A1 WO 2014034250A1
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- Prior art keywords
- resin layer
- exciter
- sound
- piezoelectric element
- sound generator
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Images
Classifications
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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
- 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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2892—Mountings or supports for transducers
- H04R1/2896—Mountings or supports for transducers for loudspeaker transducers
-
- 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
Definitions
- the disclosed embodiment relates to a sound generator, a sound generation device, and an electronic apparatus.
- an acoustic generator using a piezoelectric element is known (see, for example, Patent Document 1).
- Such an acoustic generator is configured to vibrate a diaphragm by applying a voltage to a piezoelectric element attached to the diaphragm to vibrate, and to output sound by actively utilizing resonance of the vibration.
- such a sound generator can use a thin film such as a resin film for the diaphragm, it can be configured to be thinner and lighter than a general electromagnetic speaker.
- the thin film when using a thin film for a diaphragm, the thin film is supported in a state in which a uniform tension is applied, for example, by being sandwiched from a thickness direction by a pair of frame members so as to obtain excellent acoustic conversion efficiency. Is required.
- the conventional acoustic generator described above actively uses the resonance of the diaphragm that is uniformly tensioned, and therefore, in the frequency characteristics of the sound pressure, the peak (the portion where the sound pressure is higher than the surroundings) and the dip There is a problem that high quality sound quality is difficult to obtain due to the fact that the sound pressure is lower than the surrounding area.
- One aspect of the embodiments has been made in view of the above, and an object thereof is to provide an acoustic generator, an acoustic generator, and an electronic apparatus that can obtain a favorable frequency characteristic of sound pressure.
- the acoustic generator includes an exciter, a flat vibrator, and a resin layer.
- the exciter vibrates upon receiving an electrical signal.
- the vibrator is attached with the exciter, and vibrates with the exciter due to vibration of the exciter.
- the resin layer is disposed so as to cover the exciter and the surface of the vibrator to which the exciter is attached, and is integrated with the vibrator and the exciter.
- the surface of the resin layer is provided with irregularities.
- a favorable sound pressure frequency characteristic can be obtained.
- FIG. 1A is a schematic plan view showing a schematic configuration of a basic sound generator.
- 1B is a cross-sectional view taken along line A-A ′ of FIG. 1A.
- FIG. 2 is a diagram illustrating an example of frequency characteristics of sound pressure.
- FIG. 3A is a schematic cross-sectional view showing the configuration of the sound generator according to the embodiment.
- FIG. 3B is a schematic enlarged view of a portion M1 shown in FIG. 3A.
- FIG. 3C is a schematic plan view illustrating a formation region of a convex portion and a concave portion.
- FIG. 4A is a schematic cross-sectional view (No. 1) showing another example of forming the convex portion and the concave portion.
- FIG. 1A is a schematic plan view showing a schematic configuration of a basic sound generator.
- 1B is a cross-sectional view taken along line A-A ′ of FIG. 1A.
- FIG. 2 is a diagram illustrating an example
- FIG. 4B is a schematic diagram (part 1) illustrating another method of forming the convex portion and the concave portion.
- FIG. 4C is a schematic diagram (part 2) illustrating another method of forming the convex portion and the concave portion.
- FIG. 5A is a schematic cross-sectional view (No. 2) showing another example of forming the convex portion and the concave portion.
- FIG. 5B is a schematic cross-sectional view (part 3) showing another example of forming the convex portions and the concave portions.
- FIG. 5C is a schematic plan view illustrating a distribution region of the convex portions and the concave portions illustrated in FIG. 5B.
- FIG. 6 is a schematic cross-sectional view (No.
- FIG. 7A is a diagram illustrating a configuration of the sound generation device according to the embodiment.
- FIG. 7B is a diagram illustrating a configuration of the electronic device according to the embodiment.
- FIG. 1A is a schematic plan view showing a schematic configuration of the acoustic generator 1 '
- FIG. 1B is a cross-sectional view taken along line A-A' of FIG. 1A.
- FIGS. 1A and 1B show a three-dimensional orthogonal coordinate system including a Z-axis having a vertically upward direction as a positive direction and a vertically downward direction as a negative direction. Such an orthogonal coordinate system may also be shown in other drawings used in the following description.
- FIG. 1A the resin layer 7 (described later) is not shown.
- FIG. 1B greatly exaggerates the sound generator 1 ′ in the thickness direction (Z-axis direction).
- the sound generator 1 ′ includes a frame body 2, a diaphragm 3, and a piezoelectric element 5. As shown in FIG. 1A, in the following description, the case where there is one piezoelectric element 5 is illustrated, but the number of piezoelectric elements 5 is not limited.
- the frame body 2 is composed of two frame members having a rectangular frame shape and the same shape, and functions as a support body that supports the diaphragm 3 with the peripheral edge of the diaphragm 3 interposed therebetween.
- the vibration plate 3 has a flat shape such as a plate shape or a film shape, and a peripheral portion thereof is sandwiched and fixed by the frame body 2 and is uniformly tensioned in the frame of the frame body 2. Is supported flat.
- the vibrating body 3 a is a portion that has a substantially rectangular shape within the frame of the frame body 2.
- the diaphragm 3 can be formed using various materials such as resin and metal.
- the diaphragm 3 can be made of a resin film such as polyethylene or polyimide having a thickness of 10 to 200 ⁇ m.
- the thickness and material of the frame 2 are not particularly limited, and can be formed using various materials such as metal and resin.
- stainless steel having a thickness of 100 to 1000 ⁇ m can be suitably used as the frame 2 because of its excellent mechanical strength and corrosion resistance.
- FIG. 1A shows the frame 2 in which the shape of the inner region is substantially rectangular, but it may be a polygon such as a parallelogram, trapezoid, or regular n-gon. In the present embodiment, as shown in FIG.
- the frame body 2 is configured by two frame members and the peripheral portion of the diaphragm 3 is sandwiched and supported by the two frame members is described as an example. It is not a thing.
- the frame body 2 may be constituted by a single frame member, and the peripheral edge portion of the diaphragm 3 may be bonded and supported to the frame body 2.
- the piezoelectric element 5 is an exciter which is provided by being attached to the surface of the vibrating body 3a, etc., and excites the vibrating body 3a by receiving a voltage to vibrate.
- the piezoelectric element 5 includes, for example, a laminate in which piezoelectric layers 5a, 5b, 5c, and 5d made of four ceramic layers and three internal electrode layers 5e are alternately laminated, Surface electrode layers 5f and 5g formed on the upper and lower surfaces of the laminate, and external electrodes 5h and 5j formed on the side surfaces where the internal electrode layer 5e is exposed.
- the lead terminals 6a and 6b are connected to the external electrodes 5h and 5j.
- the piezoelectric element 5 has a plate shape, and the main surface on the upper surface side and the lower surface side has a polygonal shape such as a rectangular shape or a square shape.
- the piezoelectric layers 5a, 5b, 5c, and 5d are polarized as shown by arrows in FIG. 1B. In other words, polarization is performed such that the direction of polarization with respect to the direction of the electric field applied at a certain moment is reversed between one side and the other side in the thickness direction (Z-axis direction in the figure).
- the piezoelectric layers 5c and 5d on the side bonded to the vibrating body 3a contract and the upper surface of the piezoelectric element 5 is compressed.
- the piezoelectric layers 5a and 5b on the side are deformed so as to extend. Therefore, by applying an AC signal to the piezoelectric element 5, the piezoelectric element 5 can bend and vibrate, and the vibrating body 3a can be bent.
- the main surface of the piezoelectric element 5 is joined to the main surface of the vibrating body 3a by an adhesive such as an epoxy resin.
- the materials constituting the piezoelectric layers 5a, 5b, 5c and 5d have conventionally been lead-free piezoelectric materials such as lead zirconate titanate, Bi layered compounds and tungsten bronze structure compounds.
- the used piezoelectric ceramics can be used.
- various metal materials can be used as the material of the internal electrode layer 5e.
- the piezoelectric layers 5a, 5b, 5c, and 5d are contained, the piezoelectric layers 5a, 5b, 5c, and 5d and the internal electrode layer 5e Since the stress due to the difference in thermal expansion can be reduced, the piezoelectric element 5 free from stacking faults can be obtained.
- the lead terminals 6a and 6b can be formed using various metal materials. For example, if the lead terminals 6a and 6b are configured using flexible wiring in which a metal foil such as copper or aluminum is sandwiched between resin films, the height of the piezoelectric element 5 can be reduced.
- the sound generator 1 ′ further includes a resin layer 7 formed by filling the frame 2 so as to cover the surfaces of the piezoelectric element 5 and the vibrating body 3 a.
- the resin layer 7 for example, an acrylic resin or an epoxy resin can be used.
- the resin layer 7 is filled and cured to be integrated with the vibrating body 3 a and the piezoelectric element 5, and constitutes one composite vibrating body together with the vibrating body 3 a and the piezoelectric element 5.
- the moderate damping effect can be induced by completely embedding the piezoelectric element 5 in the resin layer 7, the effect of suppressing the resonance phenomenon and suppressing the peak or dip in the frequency characteristic of the sound pressure can be reduced. Can be obtained.
- the piezoelectric element 5 is a bimorph multilayer piezoelectric element.
- the piezoelectric element 5 is not limited to this.
- a unimorph type in which the expanding and contracting piezoelectric element 5 is attached to the vibrating body 3a. It does not matter.
- FIG. 1B shows a vibrating body 3a that is flatly supported in a state where tension is uniformly applied in the frame of the frame body 2, a piezoelectric element 5 provided on the surface of the vibrating body 3a, and The resin layer 7 is shown which is integrated and formed by cutting the surface flat at the height of the frame 2.
- the composite vibration body constituted by the vibration body 3a, the piezoelectric element 5 and the resin layer 7 is shaped as a whole and has a so-called symmetrical shape.
- a peak, dip, or distortion caused by resonance induced by the vibration of the piezoelectric element 5 occurs, so that the sound pressure changes suddenly at a specific frequency, and it is difficult to flatten the frequency characteristics of the sound pressure. .
- FIG. 2 is a diagram illustrating an example of frequency characteristics of sound pressure.
- the composite vibrator constituted by the vibrator 3a, the piezoelectric element 5 and the resin layer 7 has a shape having symmetry in the thickness direction as a whole, for example, the vibrator 3a or the resin layer 7 is used.
- the Young's moduli of each are aligned as a whole.
- the height of the peak P is lowered (see the arrow 201 in the figure), the peak width is widened (see the arrow 202 in the figure), and the peak P or dip (not shown) is reduced. It is effective to take measures to make it smaller.
- the surface of the resin layer 7 is intentionally made non-flat, in other words, the surface of the resin layer 7 is intentionally provided with unevenness. That is, the symmetry in the thickness direction of the above-described composite vibrator is lowered so that the resonance frequencies are not partially aligned. As a result, the resonance mode degeneracy is solved and dispersed, the height of the peak P is lowered, and the peak width is widened.
- FIG. 3A is a schematic cross-sectional view showing the configuration of the sound generator 1 according to the embodiment.
- FIG. 3A a schematic cross-sectional view may be shown, but all of them are schematic cross-sectional views taken along the line A-A ′ of FIG. 1A.
- FIG. 3B is a schematic enlarged view of a portion M1 shown in FIG. 3A.
- FIG. 3C is a schematic plan view showing a distribution region of convex portions and concave portions.
- the acoustic generator 1 is provided with unevenness on the surface of the resin layer 7.
- unevenness can be formed, for example, by omitting the shaping step of the resin layer 7 such that the surface is cut at the height position of the frame 2.
- the distance from the height position of the frame body 2 to the surface of the vibrating body 3a is the height h1
- the distance to the piezoelectric element 5 is also the height h2. That is, height h1> height h2.
- a convex portion is formed on the surface of the resin layer 7 so as to cover the piezoelectric element 5 at a portion corresponding to the upper portion of the piezoelectric element 5, and a concave portion is formed at a portion corresponding to the periphery of the piezoelectric element 5.
- FIG. 3C The formation region where these convex portions 7a and concave portions 7b are formed is shown in FIG. 3C. 3C, at least one of the protrusions 7a is formed so as to cover the entire region overlapping with the piezoelectric element 5 when the resin layer 7 is seen through in plan view. Moreover, the convex part 7a is formed in the area
- a recess 7b is formed in the resin layer 7 other than the hatched area in FIG. 3C.
- FIG. 3C for easy understanding, the formation regions of the convex portions 7a and the concave portions 7b are clearly partitioned, but the actual form of the formation regions is not strictly defined.
- the projection 7a formed along the boundary between the resin layer 7 and the frame body 2 in a plan view suppresses the propagation of vibration around the frame body 2, which is a so-called vibration node. It is possible to cause a deviation between the incident speed and the reflection speed of vibration from the element 5.
- a convex portion 7a is formed at the boundary between the resin layer 7 and the frame body 2, and the convex portion is formed so as to cover the piezoelectric element 5 at a portion corresponding to the upper portion of the piezoelectric element 5.
- the amplitude of the convex portion 7a is smaller than that of the concave portion 7b due to the thickness, so that a difference in amplitude occurs between the convex portion 7a and the concave portion 7b. It is possible to cause a deviation between the incident speed and the reflection speed of vibration from the piezoelectric element 5.
- this also makes it possible to vary the sound pressure peak P at the resonance point and flatten the frequency characteristic of the sound pressure, so that a good frequency characteristic can be obtained.
- FIG. 4A is a schematic cross-sectional view (part 1) showing another example of forming the convex portion 7a and the concave portion 7b.
- 4B and 4C are schematic views (No. 1) and (No. 2) showing other methods of forming the convex portions 7a and the concave portions 7b.
- a plurality of convex portions 7 a and concave portions 7 b may be provided so as to be uniformly distributed on the surface of the resin layer 7. Even in such a case, since the sound pressure peak P at the resonance point can be varied between the interface of the vibrating body 3a and the surface of the resin layer 7, the frequency characteristics of the sound pressure can be flattened. . Therefore, a favorable frequency characteristic of sound pressure can be obtained.
- the surface area of the resin layer 7 can be increased by distributing the plurality of convex portions 7a and concave portions 7b on the surface of the resin layer 7, the sound propagation distance on the surface of the resin layer 7 and the vibration body 3a can be increased.
- the propagation distance at the interface can be made different. Therefore, the resonance can be smoothed, the frequency characteristic of the sound pressure can be flattened, and the good frequency characteristic of the sound pressure can be obtained.
- Such convex portions 7a and concave portions 7b can be formed by a technique as shown in FIG. 4B, for example.
- the material for forming the resin layer 7 may be filled from a plurality of nozzles 70 provided in parallel.
- the convex portions 7a and the concave portions 7b as shown on the right side of FIG. 4B can be obtained on the surface of the resin layer 7 by leaving and leaving the ejection traces of the forming materials ejected from the parallel nozzles 70 to be cured. it can.
- the height of the convex portion 7a is, for example, 1 ⁇ m to 1 mm, and the diameter when the region where the bulge starts is circular is, for example, 10 ⁇ m to 20 mm.
- the convex portions 7a and the concave portions 7b may be formed by a screen printing method. That is, as shown in FIG. 4C, by leaving the mesh marks of the screen printing screen plate 80 on the surface of the resin layer 7, it is possible to obtain the convex portions 7a and concave portions 7b as shown on the right side of FIG. 4C. it can.
- the height of the convex portion 7a is, for example, 1 ⁇ m to 100 ⁇ m
- the width of the convex portion 7a is, for example, 5 ⁇ m to 50 ⁇ m
- the width of the concave portion 7b is, for example, 5 ⁇ m to 50 ⁇ m.
- a plurality of convex portions 7a and concave portions 7b as shown in FIGS. 4A to 4C may be provided so as to be distributed more in the upper part of the piezoelectric element 5. Such a case will now be described with reference to FIGS. 5A to 5C.
- FIGS. 5A and 5B are schematic cross-sectional views (No. 2) and (No. 3) showing other examples of forming the convex portions 7a and the concave portions 7b.
- FIG. 5C is a schematic plan view showing a distribution region of the convex portions 7a and the concave portions 7b shown in FIG. 5B.
- a plurality of convex portions 7a and concave portions 7b are distributed in the upper portion of the piezoelectric element 5 in the resin layer 7, that is, in a region overlapping the piezoelectric element 5 when the resin layer 7 is seen through in plane. May be provided.
- the peak P of the sound pressure at the resonance point can be made gentler as it approaches the piezoelectric element 5. That is, the sound pressure peak P at the resonance point can be varied, and the frequency characteristic of the sound pressure can be flattened. Therefore, a favorable frequency characteristic of sound pressure can be obtained.
- a plurality of convex portions 7 a and concave portions 7 b may be provided so as to be distributed with respect to a partial region along the contour of the piezoelectric element 5.
- the partial region along the contour of the piezoelectric element 5 referred to here is a portion surrounding the contour of the piezoelectric element 5 (a portion straddling the contour) when the resin layer 7 is seen in a plan view as shown by a hatched region in FIG. 5C. is there.
- the sound pressure peak P at the resonance point can be made gentler as the piezoelectric element 5 is approached. That is, the sound pressure peak P at the resonance point can be varied, and the frequency characteristic of the sound pressure can be flattened. Therefore, a favorable frequency characteristic of sound pressure can be obtained.
- FIG. 6 is a schematic sectional view (No. 4) showing another example of forming the convex portions 7a and the concave portions 7b.
- the convex portions 7 a and the concave portions 7 b may be provided by forming the concave portions 7 b as open pores opened on the surface of the resin layer 7.
- the concave portion 7b can be formed by using a so-called shot blasting method in which an abrasive such as sand or dry ice is sprayed from the nozzle 90 as a projection material, for example.
- the diameter is, for example, 10 ⁇ m to 10 mm, and the depth is 1 ⁇ m to 50 ⁇ m.
- the convex portions 7a and the concave portions 7b can also be formed by providing the concave portions 7b as open pores opened on the surface of the resin layer 7. Therefore, the sound pressure peak P at the resonance point varies.
- the frequency characteristics of sound pressure can be flattened. Therefore, a favorable frequency characteristic of sound pressure can be obtained.
- FIG. 7A is a diagram illustrating a configuration of the sound generation device 20 according to the embodiment
- FIG. 7B is a diagram illustrating a configuration of the electronic device 50 according to the embodiment.
- the component required for description is shown and description about a general component is abbreviate
- the sound generator 20 is a sound generation device such as a so-called speaker, and includes, for example, a sound generator 1 and a housing 30 that houses the sound generator 1 as shown in FIG. 7A.
- the housing 30 resonates the sound generated by the sound generator 1 and radiates the sound to the outside through an opening (not shown) formed in the housing 30.
- the sound pressure in a low frequency band can be increased.
- the sound generator 1 can be mounted on various electronic devices 50.
- the electronic device 50 is assumed to be a mobile terminal device such as a mobile phone or a tablet terminal.
- the electronic device 50 includes an electronic circuit 60.
- the electronic circuit 60 includes, for example, a controller 50a, a transmission / reception unit 50b, a key input unit 50c, and a microphone input unit 50d.
- the electronic circuit 60 is connected to the sound generator 1 and has a function of outputting an audio signal to the sound generator 1.
- the sound generator 1 generates sound based on the sound signal input from the electronic circuit 60.
- the electronic device 50 includes a display unit 50e, an antenna 50f, and the sound generator 1. Further, the electronic device 50 includes a housing 40 that accommodates these devices.
- each device including the controller 50a is accommodated in one housing 40, but the accommodation form of each device is not limited. In the present embodiment, it is sufficient that at least the electronic circuit 60 and the sound generator 1 are accommodated in one housing 40.
- the controller 50 a is a control unit of the electronic device 50.
- the transmission / reception unit 50b transmits / receives data via the antenna 50f based on the control of the controller 50a.
- the key input unit 50c is an input device of the electronic device 50 and accepts a key input operation by an operator.
- the microphone input unit 50d is also an input device of the electronic device 50, and accepts a voice input operation by an operator.
- the display unit 50e is a display output device of the electronic device 50, and outputs display information based on the control of the controller 50a.
- the sound generator 1 operates as a sound output device in the electronic device 50.
- the sound generator 1 is connected to the controller 50a of the electronic circuit 60, and emits sound upon application of a voltage controlled by the controller 50a.
- the electronic device 50 is described as a portable terminal device.
- the electronic device 50 is not limited to the type of the electronic device 50, and may be applied to various consumer devices having a function of emitting sound.
- flat-screen TVs and car audio devices can of course be used for products having a function of emitting sound such as "speak", for example, various products such as vacuum cleaners, washing machines, refrigerators, microwave ovens, etc. .
- the sound generator according to the embodiment includes an exciter (piezoelectric element), a flat vibrating body, and a resin layer.
- the exciter vibrates when an electric signal is input thereto.
- the vibrator is provided with the exciter, and vibrates with the exciter by the vibration of the exciter.
- the resin layer is disposed so as to cover the surface of the exciter and the vibrator to which the exciter is attached, and is integrated with the vibrator and the exciter.
- the resin layer is provided with irregularities.
- the sound generator according to the embodiment it is possible to obtain a favorable frequency characteristic of sound pressure.
- the piezoelectric element is provided on one main surface of the vibrating body as an example.
- the present invention is not limited to this, and the piezoelectric element is provided on both surfaces of the vibrating body. It may be provided.
- the shape of the inner region of the frame is a substantially rectangular shape is taken as an example, and it may be a polygon, but is not limited thereto, and is not limited to a circle or an ellipse. It may be a shape.
- the diaphragm is configured by a thin film such as a resin film
- the present invention is not limited to this.
- the diaphragm may be configured by a plate-like member.
- the support body that supports the vibrating body is a frame body and supports the periphery of the vibrating body has been described as an example, but the present invention is not limited thereto. For example, it is good also as supporting only the both ends of the longitudinal direction or a transversal direction of a vibrating body.
- the exciter is a piezoelectric element
- the exciter is not limited to the piezoelectric element, and has a function of vibrating when an electric signal is input. What is necessary is just to have.
- an electrodynamic exciter for vibrating a speaker
- an electrostatic exciter for vibrating a speaker
- an electromagnetic exciter well known as an exciter for vibrating a speaker
- the electrodynamic exciter is such that an electric current is passed through a coil disposed between the magnetic poles of a permanent magnet to vibrate the coil.
- the electrostatic exciter is composed of two metals facing each other. A bias and an electric signal are passed through the plate to vibrate the metal plate, and an electromagnetic exciter is an electric signal that is passed through the coil to vibrate a thin iron plate.
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
2 枠体
3 振動板
3a 振動体
5 圧電素子
5a、5b、5c、5d 圧電体層
5e 内部電極層
5f、5g 表面電極層
5h、5j 外部電極
6a、6b リード端子
7 樹脂層
7a 凸部
7b 凹部
20 音響発生装置
30、40 筐体
50 電子機器
50a コントローラ
50b 送受信部
50c キー入力部
50d マイク入力部
50e 表示部
50f アンテナ
60 電子回路
70 ノズル
80 スクリーン版
90 ノズル
P ピーク
h1、h2 高さ
m メニスカス
Claims (10)
- 電気信号が入力されて振動する励振器と、
前記励振器が取り付けられており、該励振器の振動によって該励振器とともに振動する扁平な振動体と、
前記励振器および該励振器が取り付けられた前記振動体の表面を覆うように配置されて、前記振動体および前記励振器と一体化された樹脂層と
を備え、
前記樹脂層の表面には、凹凸が設けられていること
を特徴とする音響発生器。 - 前記凹凸の凸部の少なくとも1つは、
前記樹脂層を平面透視した場合に前記励振器と重なる領域全体を覆うように設けられていること
を特徴とする請求項1に記載の音響発生器。 - 前記凹凸の凸部は、
前記樹脂層を平面透視した場合に前記励振器と重なる領域に対して複数個分布するように設けられていること
を特徴とする請求項1に記載の音響発生器。 - 前記凹凸の凸部は、
前記樹脂層を平面透視した場合の前記励振器の輪郭に沿った部分領域に対して複数個分布するように設けられていること
を特徴とする請求項1に記載の音響発生器。 - 前記凹凸の凸部は、
前記樹脂層の表面に均一に分布するように複数個設けられていること
を特徴とする請求項1に記載の音響発生器。 - 前記振動体を支持する支持体
をさらに備え、
前記凹凸の凸部は、
平面視した場合の前記支持体と前記樹脂層との境界に沿って設けられていること
を特徴とする請求項1~5のいずれか一つに記載の音響発生器。 - 前記凹凸の凹部は、
前記樹脂層の表面に開口された開気孔として設けられていること
を特徴とする請求項1~6のいずれか一つに記載の音響発生器。 - 前記振動体は、バイモルフ型の積層型圧電素子であること
を特徴とする請求項1~7のいずれか一つに記載の音響発生器。 - 請求項1~8のいずれか一つに記載の音響発生器と、
該音響発生器を収容する筐体と
を備えることを特徴とする音響発生装置。 - 請求項1~8のいずれか一つに記載の音響発生器と、
該音響発生器に接続された電子回路と、
該電子回路および前記音響発生器を収容する筐体と
を備え、
前記音響発生器から音響を発生させる機能を有すること
を特徴とする電子機器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380003220.3A CN103843367B (zh) | 2012-08-30 | 2013-06-28 | 声音产生器、声音产生装置及电子设备 |
US14/402,807 US9407995B2 (en) | 2012-08-30 | 2013-06-28 | Acoustic generator, acoustic generation device, and electronic device |
KR1020137027025A KR101507751B1 (ko) | 2012-08-30 | 2013-06-28 | 음향 발생기, 음향 발생 장치 및 전자 기기 |
JP2014532854A JP5675004B2 (ja) | 2012-08-30 | 2013-06-28 | 音響発生器、音響発生装置および電子機器 |
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JP2012190139 | 2012-08-30 | ||
JP2012-190139 | 2012-08-30 |
Publications (1)
Publication Number | Publication Date |
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WO2014034250A1 true WO2014034250A1 (ja) | 2014-03-06 |
Family
ID=50183073
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PCT/JP2013/067892 WO2014034250A1 (ja) | 2012-08-30 | 2013-06-28 | 音響発生器、音響発生装置および電子機器 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9407995B2 (ja) |
JP (1) | JP5675004B2 (ja) |
KR (1) | KR101507751B1 (ja) |
CN (1) | CN103843367B (ja) |
TW (1) | TWI505722B (ja) |
WO (1) | WO2014034250A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015170848A (ja) * | 2014-03-10 | 2015-09-28 | サムソン エレクトロ−メカニックス カンパニーリミテッド. | 圧電素子及びこれを含む圧電振動子 |
JP2015185819A (ja) * | 2014-03-26 | 2015-10-22 | 京セラ株式会社 | バイモルフ型圧電素子の駆動装置およびこれを備えた携帯端末、音響発生器、音響発生装置、電子機器 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106028250A (zh) * | 2016-06-22 | 2016-10-12 | 深圳市摩码克来沃化学科技有限公司 | 硅胶振膜及制备方法、发声部件 |
KR102380627B1 (ko) | 2017-05-29 | 2022-03-29 | 엘지디스플레이 주식회사 | 표시 장치 |
KR102629516B1 (ko) | 2018-11-13 | 2024-01-24 | 엘지디스플레이 주식회사 | 표시장치 |
CN113767646A (zh) * | 2019-05-27 | 2021-12-07 | 索尼集团公司 | 音频再现装置和音频设备 |
Citations (1)
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JP2012110018A (ja) * | 2010-06-25 | 2012-06-07 | Kyocera Corp | 音響発生器 |
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JPH04150298A (ja) * | 1990-10-09 | 1992-05-22 | Murata Mfg Co Ltd | 額縁スピーカ |
JP2001128292A (ja) | 1999-10-28 | 2001-05-11 | Nippon Ceramic Co Ltd | 超音波トランスデューサの製造方法 |
JP3426185B2 (ja) | 2000-03-28 | 2003-07-14 | 松下電器産業株式会社 | 圧電スピーカ |
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JP2004023436A (ja) | 2002-06-17 | 2004-01-22 | Nihon Ceratec Co Ltd | 圧電スピーカ |
JP2005311415A (ja) | 2004-04-16 | 2005-11-04 | Nec Tokin Corp | 音響振動発生素子 |
TWI455602B (zh) * | 2009-01-27 | 2014-10-01 | Taiyo Yuden Kk | Piezoelectric body |
JP2010177867A (ja) * | 2009-01-28 | 2010-08-12 | Kyocera Corp | 圧電スピーカ |
KR101286768B1 (ko) * | 2009-12-08 | 2013-07-16 | 한국전자통신연구원 | 압전형 스피커 및 그 제조 방법 |
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2013
- 2013-06-28 KR KR1020137027025A patent/KR101507751B1/ko active IP Right Grant
- 2013-06-28 US US14/402,807 patent/US9407995B2/en active Active
- 2013-06-28 CN CN201380003220.3A patent/CN103843367B/zh not_active Expired - Fee Related
- 2013-06-28 JP JP2014532854A patent/JP5675004B2/ja active Active
- 2013-06-28 WO PCT/JP2013/067892 patent/WO2014034250A1/ja active Application Filing
- 2013-08-28 TW TW102130806A patent/TWI505722B/zh not_active IP Right Cessation
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JP2012110018A (ja) * | 2010-06-25 | 2012-06-07 | Kyocera Corp | 音響発生器 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015170848A (ja) * | 2014-03-10 | 2015-09-28 | サムソン エレクトロ−メカニックス カンパニーリミテッド. | 圧電素子及びこれを含む圧電振動子 |
JP2015185819A (ja) * | 2014-03-26 | 2015-10-22 | 京セラ株式会社 | バイモルフ型圧電素子の駆動装置およびこれを備えた携帯端末、音響発生器、音響発生装置、電子機器 |
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US20150139456A1 (en) | 2015-05-21 |
TW201415911A (zh) | 2014-04-16 |
JPWO2014034250A1 (ja) | 2016-08-08 |
KR101507751B1 (ko) | 2015-04-07 |
JP5675004B2 (ja) | 2015-02-25 |
US9407995B2 (en) | 2016-08-02 |
CN103843367A (zh) | 2014-06-04 |
KR20140040707A (ko) | 2014-04-03 |
TWI505722B (zh) | 2015-10-21 |
CN103843367B (zh) | 2016-08-31 |
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