Piezoelectric Or Ferroelectric Patents (Class 381/173)
  • Patent number: 10219055
    Abstract: Disclosed is a loudspeaker module comprising a module housing, wherein a loudspeaker unit is accommodated in the module housing; the loudspeaker unit comprises a unit housing and a unit front cover; an end surface of a sidewall of at least one side of the unit housing is provided with an ultrasonic surface welded to the module housing by means of ultrasound; and an ultrasonic line bonded with the ultrasonic surface by means of ultrasound is provided at a position on the module housing corresponding to the ultrasonic surface. The loudspeaker module of the present invention solves the technical problems of a complex assembly process, poor sealing performance and poor appearance of the loudspeaker module in the prior art, and the loudspeaker module of the present invention has a simple assembly process, good sealing performance, high quality appearance, excellent acoustic performance, high production efficiency and low production cost.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: February 26, 2019
    Assignee: GOERTEK INC.
    Inventors: Zhaopeng Li, Huawei Liu, Xueping Song, Zhilei Han
  • Patent number: 10136858
    Abstract: A method for inspecting a pressure pulse wave sensor is provided. The sensor chip includes a recess which is recessed in a direction perpendicular to the pressure-sensitive face, and the pressure-sensitive element array is formed in a portion of the sensor chip whose thickness is reduced in the direction due to the recess. The method includes: bonding and fixing the sensor chip onto the substrate so that the recess communicates with atmospheric air through only the through hole of the substrate; connecting a substrate-side terminal portion of the substrate and the chip-side terminal portion through an electrically conductive member; and performing characteristic evaluation on the sensor chip based on a signal outputted from the substrate-side terminal portion in a state in which air is sucked through the through hole of the substrate to thereby apply negative pressure to the pressure-sensitive face.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: November 27, 2018
    Assignee: OMRON HEALTHCARE Co., Ltd.
    Inventors: Noriko Shigihara, Yuki Kato, Masayuki Wakamiya, Toshihiko Ogura
  • Patent number: 10136213
    Abstract: The present invention relates to a microphone module comprising a first directional microphone comprising a front sound inlet and a front membrane, a second directional microphone comprising a rear sound inlet and a rear membrane, and a middle sound inlet arrangement being acoustically connected to the front and rear membranes, said middle sound inlet arrangement comprising acoustical resistance means arranged at least partly therein. The microphone module aims at generating a cardioid and an anti-cardioid response, or alternatively any other back-to-back polar patterns.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: November 20, 2018
    Assignee: Sonion Nederland B.V.
    Inventors: Anne-Marie Sänger, Arkadiusz Wasylków
  • Patent number: 10081537
    Abstract: Aspects of the disclosure provide a packaging technique for making a directional microphone which employs mechanical structures to cancel undesired background noise to realize the directional function instead of an extra sensor required in electronic noise-cancelling techniques, thus reducing footprint and cost of a directional microphone. A directional microphone based on this technique can include an acoustic sensor and a housing enclosing the acoustic sensor. The acoustic sensor can include a sensing diaphragm, a cavity below the sensing diaphragm, and a first substrate. The directional microphone device can further includes a channel with an inlet open at an edge of the first substrate and an outlet connected with the cavity. The housing can include a cover attached to a second substrate supporting the first substrate. The cover can include a first opening over the sensing diaphragm and a second opening at a side of the cover.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: September 25, 2018
    Inventors: Kathirgamasundaram Sooriakumar, Anu Austin, Ian Rose Bihag
  • Patent number: 9986355
    Abstract: An electroacoustic transducer comprises a sleeve extending along a longitudinal axis; a diaphragm coupled to the sleeve at a first end of the sleeve; a subassembly in the sleeve; and an alignment element extending from the subassembly in a direction substantially away from the diaphragm.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: May 29, 2018
    Assignee: BOSE CORPORATION
    Inventors: Christopher A. Pare, David W. Beverly
  • Patent number: 9942672
    Abstract: A resilient element is used to bias a vibration element of an auditory prosthesis towards the skin of a recipient. This helps improve transmission of vibration stimuli to the recipient. Additionally, the resilient element helps reduce feedback caused by the vibration element vibrating in close proximity to sound processing components contained within the auditory prosthesis.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: April 10, 2018
    Assignee: COCHLEAR LIMITED
    Inventors: Martin Evert Gustaf Hillbratt, Henrik Fyrlund, Marcus Andersson
  • Patent number: 9781523
    Abstract: A hearing instrument microphone device incudes at least two microphone sound ports (or sound inlets), a pressure difference microphone in communication with at least two of the sound ports and a pressure microphone in communication with at least one of the sound ports, wherein the acoustic centers of the pressure difference microphone and the pressure microphone essentially coincide.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: October 3, 2017
    Assignee: Sonova AG
    Inventors: Martin Kuster, Alfred Stirnemann, Axel Schlesinger
  • Patent number: 9763014
    Abstract: Embodiments are disclosed for a loudspeaker driven by one or more piezoelectric actuators. In embodiments of the disclosure, a loudspeaker comprises a support structure, and a piezoelectric layered cantilever actuator affixed to the support structure via at least two grips. The support structure may also comprise a membrane suspended over the piezoelectric actuator, the membrane being in contact with the piezoelectric actuator between the at least two grips.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: September 12, 2017
    Assignee: Harman International Industries, Incorporated
    Inventor: Ulrich Horbach
  • Patent number: 9756428
    Abstract: An electro-acoustic transducer includes a base, a plurality of vibration portions and a connection portion. Each of the vibration portion includes a piezoelectric transduction layer and has a first connection end and a second connection end opposite to each other, and the first connection ends are connected to the base. The connection portion is separated from the base and connected to the second connection ends. The piezoelectric transduction layers are adapted to receive electrical signals to deform, such that the vibration portions are driven to vibrate and generate corresponding acoustic waves. The vibration portions are adapted to receive acoustic waves to vibrate, such that the piezoelectric transduction layers are driven to deform and generate corresponding electrical signals.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: September 5, 2017
    Assignee: GlobalMEMS Co., Ltd.
    Inventors: Shih-Hsiung Tseng, Ming-Ching Wu
  • Patent number: 9728392
    Abstract: A monolithic electrode includes a first portion devoid of apertures and a second portion surrounded by the first portion, the second portion having a web defining a plurality of apertures. A method for forming an electrode includes forming a first electrode portion devoid of apertures and forming a second electrode portion having a web defining a plurality of apertures. The web of the second electrode portion connects to the first electrode portion.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: August 8, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Ben D. Gardner
  • Patent number: 9674604
    Abstract: The invention relates to a microphone (10). A first (14a) and a second (14b) diaphragm are provided in a housing (12). A first chamber (24a) is delimited by a first side of the first diaphragm (14a) and an inner surface of the housing (12). A first opening (18a) extends from the first chamber (24a) to surroundings of the microphone (10). A second chamber (24b) is delimited by a first side of the second diaphragm (14b) and an inner surface of the housing (12). A second opening (18b) extends from the second chamber (24b) to the surroundings. A common chamber (22) is delimited by a second side of the first diaphragm (14a), a second side of the second diaphragm (14b) and an inner surface of the housing (12). A third opening (20) extends from the common chamber (22) to the surroundings.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: June 6, 2017
    Assignee: Sonion Nederland B.V.
    Inventor: Dion Ivo deRoo
  • Patent number: 9505031
    Abstract: An ultrasonic transducer with housing contains a transducer assembly, an outer housing surface being fixed against a barrier surface for transferring ultrasonic waves to and from a barrier. The housing has an inner surface with plateau. A cap closes the housing and the transducer assembly has a piezoelectric transducer with a pressure surface around its outer perimeter and an opposite vibration surface engaging the plateau. A ring engages the pressure surface for biasing the vibration surface against the plateau. A holder engages the cap, transducer and ring for positioning and a plurality of springs are spaced around the transducer perimeter and between the cap and ring for biasing the vibration surface toward or against the raised plateau. A viscous couplant is between the vibration surface and plateau for enhancing transmission of the ultrasonic waves.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: November 29, 2016
    Assignee: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Kyle R. Wilt, Henry A. Scarton, Tristan J. Lawry, Jonathan D. Ashdown, Gary J. Saulnier
  • Patent number: 9503799
    Abstract: A handheld microphone includes a microphone unit supported with a vibration insulator on a microphone case; the handheld microphone comprising a filter circuit for filtering output signals from the microphone unit; the filter circuit comprising a passive filter connected to an output terminal of the microphone unit, and a high-pass filter connected downstream of the passive filter and outputting the filtered signals from the microphone unit.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: November 22, 2016
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 9462372
    Abstract: A unidirectional condenser microphone includes a first and second condenser elements each having a diaphragm and a fixed electrode disposed opposite the diaphragm, an insulating base having an opening at the center thereof and supporting the respective fixed electrodes of the first and second condenser elements at opposite sides of the insulating base, acoustic resistance materials covering both ends of the opening, and air chambers formed respectively between each of the fixed electrodes and the insulating base, such that respective back sides of the diaphragms of the first and the second condenser elements are acoustically in communication with each other, wherein the diaphragm of the second condenser elements is formed to be an annular-shape having a central opening, and the second condenser element has a rear acoustic terminal hole communicating with the central opening.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: October 4, 2016
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventor: Hiroshi Akino
  • Patent number: 9420365
    Abstract: A silicon condenser microphone is disclosed. The silicon condenser microphone includes a substrate including a side surrounding a cavity, a transducer unit supported by the substrate, a partition positioned in the cavity of the substrate for dividing the cavity into an upper cavity and a lower cavity. The transducer unit includes a backplate and a diaphragm forming a capacitor. The partition includes a main body connected to an inner surface of the side of the substrate, and a perforation penetrating the main body for communicating the upper cavity with the lower cavity. The sensitivity of the silicon condenser microphone is accordingly improved.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: August 16, 2016
    Assignee: AAC Acoustic Technologies (Shenzhen) Co., Ltd.
    Inventor: Congliang Xu
  • Patent number: 9414141
    Abstract: A portable electronic device that provides compact configurations for audio elements are disclosed. The audio elements can be drivers (e.g., speakers) or receivers (e.g., microphones). According to one aspect, mesh structures, such as mesh barriers, are formed to facilitate improved acoustic sealing in a space efficient manner. In one embodiment, a mesh barrier for an audio port can be reliably acoustically sealed (or coupled) with an audio chamber and/or outer device housing in a space efficient manner. A mesh barrier can serve to block undesired foreign substances from entry or further entry into an audio port and/or serve as a cosmetic barrier which obscures vision into an audio port. In one embodiment, a portion of a mesh structure can be provided with a substantially planar surface that facilitates improved acoustic sealing.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: August 9, 2016
    Assignee: APPLE INC.
    Inventors: Sawyer I. Cohen, Jared M. Kole, Michael B. Wittenberg, Nicholas Merz
  • Patent number: 9380391
    Abstract: A microphone and method of manufacturing the microphone are provided. The microphone includes a substrate that has a penetration aperture, a vibration film disposed on the substrate that covers the penetration aperture, and a first electrode disposed on the vibration film. The first electrode includes a first portion and a second portion separated from each other. In addition, the microphone includes a piezoelectric layer disposed on the second portion of the first electrode, a second electrode disposed on the piezoelectric layer, and a fixed electrode. Further, the first portion of the first electrodes is disposed at a substantially center portion of the vibration film and the second portion of the first electrode is disposed at an edge portion of the vibration film.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: June 28, 2016
    Assignee: Hyundai Motor Company
    Inventors: Ilseon Yoo, Hyunsoo Kim
  • Patent number: 9264798
    Abstract: The invention relates to a microphone (10). A first (14a) and a second (14b) diaphragm are provided in a housing (12). A first chamber (24a) is delimited by a first side of the first diaphragm (14a) and an inner surface of the housing (12). A first opening (18a) extends from the first chamber (24a) to surroundings of the microphone (10). A second chamber (24b) is delimited by a first side of the second diaphragm (14b) and an inner surface of the housing (12). A second opening (18b) extends from the second chamber (24b) to the surroundings. A common chamber (22) is delimited by a second side of the first diaphragm (14a), a second side of the second diaphragm (14b) and an inner surface of the housing (12). A third opening (20) extends from the common chamber (22) to the surroundings.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: February 16, 2016
    Assignee: SONION NEDERLAND B.V.
    Inventor: Dion Ivo de Roo
  • Patent number: 9242274
    Abstract: Capacitive micromachined ultrasonic transducers (CMUTs) having a pre-charged floating electrode are provided. Such CMUTs can operate without an applied DC electrical bias. Charge can be provided to the floating electrode after or during fabrication in various ways, such as injection by an applied voltage, and injection by ion implantation.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: January 26, 2016
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Min-Chieh Ho, Mario Kupnik, Butrus T. Khuri-Yakub
  • Patent number: 9131039
    Abstract: An apparatus including a flexible circuit having a flexible substrate and at least one electrical conductor; and a least one piezoelectric member adapted to move when a voltage is applied to the piezoelectric member. The piezoelectric member is mounted to a first side of the flexible substrate and electrically connected to at least one of the electrical conductors.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: September 8, 2015
    Assignee: Nokia Technologies Oy
    Inventor: Thorsten Behles
  • Publication number: 20150131819
    Abstract: A microphone package for providing a modified microphone signal includes a microphone and an equalizer device coupled to the microphone.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 14, 2015
    Applicant: Infineon Technologies AG
    Inventors: Dietmar Straeussnigg, Andreas Wiesbauer
  • Publication number: 20150117680
    Abstract: Provided are an acoustic sensor and a method of manufacturing the same. The acoustic sensor includes a substrate including an acoustic chamber, a first hole, and a second hole, penetrating the substrate, a lower electrode pad extended onto a top surface of the substrate while covering a sidewall of the first hole, a diaphragm pad extended onto the top surface of the substrate while covering a sidewall of the second hole, a lower electrode provided on the acoustic chamber and connected to the lower electrode pad, and a diaphragm above the lower electrode while being separated from the lower electrode and connected to the diaphragm pad.
    Type: Application
    Filed: April 2, 2014
    Publication date: April 30, 2015
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jaewoo LEE, Chang Han JE, Woo Seok YANG, Jong-Kee KWON
  • Patent number: 8942393
    Abstract: A piezoelectric sound component that includes a resin sheet, a piezoelectric diaphragm, and a casing. The piezoelectric diaphragm vibrates by bending, and is attached to at least part of a central portion of the resin sheet excluding a peripheral portion of the resin sheet. The casing holds the peripheral portion of the resin sheet. The casing supports at least one corner portion of the piezoelectric diaphragm.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: January 27, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masakazu Yamauchi, Toshio Imanishi
  • Patent number: 8934650
    Abstract: A low profile ultrasonic emitter comprises a support member operable to support an ultrasonic emittive material, the support member including a plurality of support ribs, each support rib being spaced from adjacent support ribs and extending longitudinally along the support member. An ultrasonic emittive film is coupled to upper portions of the support ribs so as to be carried by the support member. A first electric lead is coupled to a first face of the emittive film and a second electric lead coupled to an opposing face of the emittive film. The first and second leads are coupled to their respective faces adjacent one another but staggered from one another so as to not overlap one another when the film is positioned between the leads.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: January 13, 2015
    Assignee: Turtle Beach Corporation
    Inventors: Elwood G. Norris, John Bolton, Julian Groeli, Jin Chen
  • Publication number: 20140369534
    Abstract: A sound pickup system is disclosed. The sound pickup system includes a screen, an accelerometer attached to the screen, and a pre-processing module electrically connecting with the accelerometer. The screen is configured to detect a vibration caused by sound waves, the accelerometer is configured to receive the vibration detected by the screen and convert the vibration into an acceleration signal, and the pre-processing module is configured to receive the acceleration signal, and process the acceleration signal then convert the processed acceleration signal into a voice signal.
    Type: Application
    Filed: January 24, 2014
    Publication date: December 18, 2014
    Applicants: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD., AAC ACOUSTIC TECHNOLOGIES (CHANGZHOU) CO., LTD., AAC TECHNOLOGIES (NANJING) CO., LTD.
    Inventors: Chao Wang, Qi Tang
  • Patent number: 8913767
    Abstract: There are provided a vibration film (21) having a piezoelectric element, a magnetic circuit (20) which generates magnetic force on the basis of a first electric signal and vibrates the vibration film (21) by the magnetic force; and an adjustment unit (31) which generates a second electric signal on the basis of the first electric signal and applies a voltage based on the second electric signal between both surfaces of the piezoelectric element. The amplitude of the entire vibration film (21) is expanded by making the vibration by the magnetic force, which is generated from the magnetic circuit (20), and the vibration, which is generated by application of a voltage to the piezoelectric element, synchronize with each other.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: December 16, 2014
    Assignee: Lenovo Innovations Limited (Hong Kong)
    Inventors: Yasuharu Onishi, Shigeo Sato, Jun Kuroda, Yukio Murata, Yuichiro Kishinami, Nobuhiro Kawashima, Motoyoshi Komoda
  • Patent number: 8897473
    Abstract: Provided is an acoustic generator which has a high sound pressure at ultrahigh frequencies and which can suppress occurrence of large peak dips. An acoustic generator includes a film, a frame member disposed on an outer peripheral edge of the film, a piezoelectric element disposed on the film and inside the frame member, and a resin layer filled inside the frame member so as to cover the piezoelectric element.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: November 25, 2014
    Assignee: Kyocera Corporation
    Inventors: Shuichi Fukuoka, Noriyuki Kushima, Hiroyuki Kawamura, Hiroshi Ninomiya
  • Patent number: 8879771
    Abstract: In an embodiment an apparatus includes a graphical display panel and a loudspeaker. The panel has a display layer for displaying images and defines a plurality of apertures penetrating through at least the display layer. The loudspeaker includes a diaphragm arranged substantially parallel to the display layer. Sound from the loudspeaker diaphragm is directed outside a host device through the apertures. The speaker may be an electret or a piezo-electric speaker for thinness. There may be apertures on an opposed side of the host device housing to achieve a dipole pattern which is directed and gives acoustic privacy to the user, or a rear acoustic cavity for a monopole pattern which more broadly disperses the sound. One illustrated embodiment is selectable between monopole and dipole. Size and total area of the holes determines acoustic resistance and so a method is described to determine those from physical parameters of the display panel.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: November 4, 2014
    Assignee: Nokia Corporation
    Inventors: Timothy J. Mellow, Leo Mikko Johannes Karkkainen, Zoran Radivojevic, Koray Ozcan
  • Patent number: 8873776
    Abstract: Disclosed is a piezoelectric speaker including: a piezoelectric layer that converts electrical signals into oscillation and outputs sound; an electrode that is formed on a top or a bottom of the piezoelectric layer to apply the electrical signals to the piezoelectric layer; an acoustic diaphragm that is made of a hetero material including a first acoustic diaphragm and a second acoustic diaphragm and is attached to the bottom of the piezoelectric layer on which the electrode is formed; and a frame attached in a form enclosing a side of the acoustic diaphragm.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: October 28, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hye-Jin Kim, Woo Seok Yang, Jong Dae Kim
  • Publication number: 20140294209
    Abstract: A microphone base includes a plurality of metal layers and a plurality of core layers. Each of the plurality of core layers is disposed between selected ones of the metal layers. A dielectric membrane is disposed between other selected ones of the plurality of metal layers. A port extends through the metal layers and the core layers but not through the dielectric membrane. The dielectric membrane has a compressed portion and an uncompressed portion. The uncompressed portion extends across the port and the compressed portion is in contact with the other selected ones of the metal layers. The compressed portion of the membrane is effective to operate as a passive electronic component and the uncompressed portion is effective to act as a barrier to prevent at least some external debris from traversing through the port.
    Type: Application
    Filed: November 4, 2011
    Publication date: October 2, 2014
    Applicant: KNOWLES ELECTRONICS, LLC
    Inventors: John B. Szczech, Peter Van Kessel
  • Patent number: 8842870
    Abstract: Audio apparatus comprising a housing and a piezoelectric transducer (12) mounted in the housing (10) so that the transducer is adjacent a user's pinna whereby the transducer excites vibration in the pinna to cause it to transmit an acoustic signal from the transducer to a user's inner ear characterised by comprising a coupler (14) coupling the transducer (12) to the housing (10) with the coupler (14) approximating to a simple support for the transducer (12).
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: September 23, 2014
    Assignee: NVF Tech Ltd.
    Inventors: James East, Neil Simon Owen
  • Patent number: 8824702
    Abstract: The present invention provides a reverse-phase modulating structure of a piezoelectric ceramic speaker, comprising a positioning frame, an acoustic generator and two or more than two flexible units; wherein the acoustic generator comprises a plurality of ceramic layers stacked onto one another to form a ceramic slat, and said flexible units are clamped between an inner edge of the positioning frame and the acoustic generator. Via the pressure exerted onto the acoustic member by the flexible units, the in-phase movement of the acoustic generator can be modulated and the phase conflict of the acoustic generator can be reduced as well as the prevision of the sound quality distortions such that high quality of the ceramic speaker can be enhanced and realized.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: September 2, 2014
    Assignee: Abatech Electronics Co., Ltd.
    Inventor: Hsiang-Chih Yu
  • Patent number: 8798293
    Abstract: A piezoelectric speaker includes a cover with a receiving space and a vibrating speaker unit accommodated in the receiving space. The vibrating speaker unit includes a piezoelectric oscillator including an upper surface and an lower surface, a diaphragm disposed on the upper surface of the piezoelectric oscillator, and a vibrating member kept a distance from the lower surface of the piezoelectric oscillator. The piezoelectric oscillator defines a first amplitude capable of driving the diaphragm only and a second amplitude driving both the vibrating member to vibrating with a largest amplitude and the diaphragm to generate sound. The distance is larger than the first amplitude and smaller than the second amplitude.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: August 5, 2014
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components Inc.
    Inventors: Lin Liu, Jie He, Sheng-Ping Yu
  • Patent number: 8724832
    Abstract: This disclosure provides systems, methods and apparatus for sense elements in an electromechanical microphone device. In one aspect, a piezoelectric sense element may include a glass substrate, electrode layers, piezoelectric layers, and elastic layers. The elastic layers may serve to modify the neutral plane of the piezoelectric sense element. Including an elastic layer or layers to modify the neutral plane of the piezoelectric sense element may serve to configure the sense element such that the piezoelectric layer generates a voltage in response to a sound wave or may serve to increase the sensitivity of the sense element.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: May 13, 2014
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Philip Jason Stephanou, David William Burns
  • Patent number: 8699728
    Abstract: A vibrating electrode plate 24 that senses a sound pressure faces a counter electrode plate 25 to form a capacitance type acoustic sensor. Acoustic perforations are opened in the counter electrode plate 25 in order to allow vibration to pass through. The acoustic perforations opened in the counter electrode plate 25 include plural acoustic perforations 31 having a relatively small opening area and one acoustic perforation 36 having a relatively large opening area. The acoustic perforations 31 and 36 are disposed into a lattice shape at equal intervals. Assuming that L is a width of a diaphragm 28, in the counter electrode plate 25, the acoustic perforation 36 having the large opening area is provided within a circular region a having a radius r=L/4 around a position facing a center of the diaphragm 28.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: April 15, 2014
    Assignee: OMRON Corporation
    Inventors: Takashi Kasai, Masaki Munechika, Toshiyuki Takahashi
  • Patent number: 8670578
    Abstract: A piezoelectric actuator 60 includes a piezoelectric element 10 expanding and contracting according to a state of an electric field, a pedestal 20, a vibration film 30, and a support member. In the vibration mode of the divided vibration occurring in the piezoelectric actuator in a high frequency band, one or more reinforcement members 50 are selectively disposed on an upper surface or a lower surface of the piezoelectric element 10, in a region where a node of divided vibration occurs. With such configurations, the vibration mode can be changed in the piezoelectric element 10. Therefore, in the frequency sound pressure level characteristics, the divided vibration causing hills or valleys (peaks or dips) can be effectively suppressed, thus enabling the achievement of flatness of frequency sound pressure level characteristics and of reproduction of excellent sound.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: March 11, 2014
    Assignee: NEC Corporation
    Inventors: Yasuharu Onishi, Masatake Takahashi, Yasuhiro Sasaki, Shigeo Satou
  • Patent number: 8644527
    Abstract: A piezoelectric acoustic transducer achieves both space-saving and high sound quality without increasing the number of parts. In order to achieve this, the transducer includes a piezoelectric element constructed of a piezoelectric material interposed between two surface electrodes and a diaphragm of which at least one principal surface is provided with a print wiring and at least one principal surface is bonded to the piezoelectric element. The diaphragm includes a frame section, a vibrating section which is bonded with the piezoelectric element and which vibrates, and at least one supporting section which connects the frame section and the vibrating section and which supports the vibrating section. Either the frame section or the at least one supporting section includes at least one electrical resistance which is integrally formed to the print wiring and which constructs, in combination with the piezoelectric element, a series-RC circuit.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: February 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Akiko Fujise, Toshiyuki Matsumura, Kazue Satoh
  • Publication number: 20130329920
    Abstract: A piezoelectric MEMS microphone comprising a multi-layer sensor that includes at least one piezoelectric layer between two electrode layers, with the sensor being dimensioned such that it provides a near maximized ratio of output energy to sensor area, as determined by an optimization parameter that accounts for input pressure, bandwidth, and characteristics of the piezoelectric and electrode materials. The sensor can be formed from single or stacked cantilevered beams separated from each other by a small gap, or can be a stress-relieved diaphragm that is formed by deposition onto a silicon substrate, with the diaphragm then being stress relieved by substantial detachment of the diaphragm from the substrate, and then followed by reattachment of the now stress relieved diaphragm.
    Type: Application
    Filed: August 9, 2013
    Publication date: December 12, 2013
    Applicant: The Regents of the University of Michigan
    Inventors: Karl Grosh, Robert J. Littrell
  • Patent number: 8582788
    Abstract: A microphone includes a first diaphragm and a second diaphragm coupled to the first diaphragm by a closed air volume. The first diaphragm and the second diaphragm each constitutes a piezoelectric diaphragm. The first diaphragm and the second diaphragm are electrically coupled so that movement of the first diaphragm causes movement of the second diaphragm.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: November 12, 2013
    Assignee: EPCOS AG
    Inventors: Anton Leidl, Wolfgang Pahl, Ulrich Wolff
  • Patent number: 8555483
    Abstract: A vibrating element manufacturing method by which adhesion is stabilized and yield is improved, a vibrating element, a vibrating actuator, a lens barrel and a camera system. A vibrating element manufacturing method is provided with a first step of arranging an elastic body on a holding member, a second step of forming an electromechanical transducing element by injection molding on the surface of the elastic body, and a third step of sintering the electromechanical transducing element by heating and bonding the elastic body with the electromechanical transducer element.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: October 15, 2013
    Assignee: Nikon Corporation
    Inventor: Takahiro Sato
  • Patent number: 8553911
    Abstract: A diaphragm of an MEMS electroacoustic transducer including a first axis-symmetrical pattern layer is provided. Because the layout of the first axis-symmetrical pattern layer can match the pattern of the sound wave, the vibration uniformity of the diaphragm can be improved.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: October 8, 2013
    Assignee: United Microelectronics Corp.
    Inventor: Li-Che Chen
  • Patent number: 8542852
    Abstract: An electro-mechanical transducer contains a vibrating electrode (15b), a vibrating-electrode-insulating film (15a) disposed at a bottom surface of the vibrating electrode (15b), an electret layer (13) facing to the vibrating electrode (15b), an electret-insulating layer (14e) joined to a top surface of the electret layer (13), and a back electrode 17 in contact with a bottom surface of the electret layer (13). A microgap between ten nanometers and 100 micrometers is established between the vibrating-electrode-insulating film (15a) and electret-insulating layer (14e). A central line average roughness Ra of the vibrating electrode (15b), including a bending, is 1/10 or less of a gap width measured between the bottom surface of the vibrating electrode (15b) and the top surface of the electret layer (13).
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: September 24, 2013
    Assignee: National University Corporation Saitama University
    Inventor: Kensuke Kageyama
  • Patent number: 8526642
    Abstract: Provided are a piezoelectric micro speaker and a method of manufacturing the same. The piezoelectric micro speaker includes: a substrate having a cavity therein; a diaphragm that is disposed on the substrate, the diaphragm including a vibrating membrane that overlaps the cavity; a piezoelectric actuator that is disposed on the vibrating membrane; and a weight that is disposed in the cavity and attached to a center portion of the vibrating membrane.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: September 3, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seok-whan Chung, Dong-kyun Kim, Byung-gil Jeong, Jun-sik Hwang
  • Patent number: 8520869
    Abstract: Provided is a piezoelectric type loudspeaker capable of reproducing a high sound pressure in a limited space, without increasing a voltage applied to a piezoelectric element in a bass range. A plurality of piezoelectric diaphragms are disposed in parallel, and coupled to one another in a thickness direction of the diaphragms via a coupling member, and a polarity of the piezoelectric element and the applied voltage are defined so as to cause deformations in opposite directions from each other. One diaphragm includes an edge on a periphery, and operates as a sound wave radiation surface. At least one diaphragm is fixed to a housing side via a fixing member. Series resistance is connected to the piezoelectric element on the piezoelectric diaphragm fixed to the housing side.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: August 27, 2013
    Assignee: Panasonic Corporation
    Inventor: Akiko Fujise
  • Patent number: 8509462
    Abstract: A piezoelectric micro speaker and a method of manufacturing the same are provided. The piezoelectric micro speaker includes a substrate having a cavity formed therein and a diaphragm that is disposed on the substrate that overlaps the cavity. A plurality of first vibrating membranes having concentric annular ring shapes are disposed in a first region of the diaphragm corresponding to a center of the cavity. A second vibrating membrane including a different material from that of the first vibrating membranes is formed in the second region of the diaphragm corresponding to an edge of the cavity. A piezoelectric actuator for vibrating the first vibrating membranes is formed on and between the concentric annular rings of the first vibrating membranes.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: August 13, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-gil Jeong, Dong-kyun Kim, Seok-whan Chung, Jun-sik Hwang
  • Patent number: 8509461
    Abstract: A bone conduction device, comprising: a sound input element configured to receive an acoustic sound signal; an electronics module configured generate an electrical signal representing said acoustic sound signal; and a transducer, comprising a mass configured to move in a rotational direction, configured to generate a vibrational force in a tangential direction with respect to a recipient's bone.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: August 13, 2013
    Assignee: Cochlear Limited
    Inventor: John L. Parker
  • Patent number: 8503693
    Abstract: A system and method for sensing acoustic sounds is provided having at least one directional sensor, each directional sensor including at least two compliant membranes for moving in reaction to an excitation acoustic signal and at least one compliant bridge. Each bridge is coupled to at least a respective first and second membrane of the at least two membranes for moving in response to movement of the membranes it is coupled to for causing movement of the first membrane to be related to movement of the second membrane when either of the first and second membranes moves in response to excitation by the excitation signal. The directional sensor is controllably rotated to locate a source of the excitation signal, including determining a turning angle based on a linear relationship between the directionality information and sound source position described in experimentally calibrated data.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: August 6, 2013
    Assignee: University of Maryland
    Inventors: Miao Yu, Haijun Liu
  • Patent number: 8503700
    Abstract: A piezoelectric speaker includes: a chassis having a wall surface including an opening; a plurality of diaphragms including at least a first piezoelectric diaphragm and second piezoelectric diaphragms which vibrate in phases opposite to each other when a voltage is applied; and a joint member which connects the first and second piezoelectric diaphragms in a positional relationship such that the diaphragms are located at positions different from each other in a thickness direction. One of the diaphragms is provided, in the opening of the chassis, to have one surface facing an outside of the chassis and another surface facing an inside of the chassis. The diaphragm functions as a radiation plate which radiates a sound wave by vibrating at an amplitude generated by synthesizing amplitudes of the first and second piezoelectric diaphragms.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: August 6, 2013
    Assignee: Panasonic Corporation
    Inventors: Akiko Fujise, Toshiyuki Matsumura
  • Patent number: 8492957
    Abstract: An apparatus for generating electric energy comprises a vibration plate, a supporting board, at least one side-wall unit and at least one piezoelectric substrate having a first- and a second end surfaces covered with a first- and a second electrodes, respectively. They all together form at least one cavity resonator. If a sound pressure from the outside arrives at the vibration plate, an acoustic vibration is excited in the vibration plate, and thereby a resonance vibration is induced in the cavity resonator. In this time, the piezoelectric substrate responds collectively to the resonance vibration. Thus, a resonance energy occurred in the cavity resonator is converted into an electric energy, which is delivered through the first- and second electrodes.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 23, 2013
    Inventor: Kohji Toda
  • Patent number: 8433081
    Abstract: A bone conduction device, comprising: a sound input element configured to receive an acoustic sound signal; an electronics module configured generate an electrical signal representing said acoustic sound signal; and a transducer, comprising a mass configured to move in a rotational direction, configured to generate a vibrational force in a tangential direction with respect to a recipient's bone.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 30, 2013
    Assignee: Cochlear Limited
    Inventor: John L. Parker