Multimorph Patents (Class 310/332)
  • Patent number: 10154336
    Abstract: To reduce the driving loss in the diaphragm, and to ensure a good sound output in the wide bandwidth. It includes a circular coil bobbin at least partly disposed between a yoke and a magnet, a coil wound around the coil bobbin, the coil being configured to be moved with the coil bobbin where a driving current is supplied to the coil, a piezoelectric element having one end coupled to one end of the coil bobbin in a movement direction, the piezoelectric element being configured to be expanded and contracted and moved in a direction same as the movement direction where an electric current is supplied to the piezoelectric element, and a diaphragm having an inner circumference part coupled to another end of the piezoelectric element, and a coupled part of the diaphragm to the piezoelectric element and a coupled part of the piezoelectric element to the coil bobbin are positioned on a straight line in the movement direction.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: December 11, 2018
    Inventors: Takahisa Tagami, Nobukazu Suzuki, Kaneaki Fujishita
  • Patent number: 10126270
    Abstract: An ultrasonic sensor assembly includes a flexible supporting material that has flexibility configured for allowing bending of the supporting material to conform to a cylindrical shape of a pipe. The assembly includes a plurality of operable sensor elements arranged in a matrix formation upon the flexible supporting material. The matrix formation includes a plurality of rows of the sensor elements and a plurality of columns of the sensor elements. The flexible supporting material is configured for placement of the columns of the matrix formation to extend along the elongation of the pipe and the flexible supporting material is configured for placement of the rows of the matrix formation to extend transverse to the elongation of the pipe. The flexible support material is configured to flex for positioning the sensor elements within each row in a respective arc that follows a curve of the cylinder shape of the pipe.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: November 13, 2018
    Assignee: General Electric Company
    Inventors: Wolf-Dietrich Kleinert, Mark Howard Feydo
  • Patent number: 9972767
    Abstract: The invention relates to a dielectric transducer structure comprising a body of elastomeric material that is provided with an electrode arrangement on each of two boundary surfaces lying oppositely to one another. At least one boundary surface comprises a corrugated area that comprises heights and depths. The aim of the invention is to improve the compliance to elastic deformations of the dielectric transducer structure. To this end, the heights and depths are arranged in both perpendicular directions of the boundary surface.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: May 15, 2018
    Assignee: Danfoss A/S
    Inventors: Hans-Erik Kiil, Mohamed Benslimane
  • Patent number: 9748469
    Abstract: Provided is a multilayer actuator and a display device comprising the same with improved driving displacement that includes, for example, a plurality of electroactive layers, wherein the electroactive layers comprise a ferroelectric polymer, and polarization directions of all electroactive layers are substantially the same.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: August 29, 2017
    Assignee: LG DISPLAY CO., LTD.
    Inventors: MyungJin Lim, SuSeok Choi, Yong-Su Ham, Taeheon Kim, YongWoo Lee, Seulgi Choi
  • Patent number: 9674417
    Abstract: A mobile terminal including a camera module includes a case; a camera module housing, wherein at least a portion of the housing is exposed through an opening in the case; a first lens unit disposed in the housing and having a plurality of lenses configured to focus light received through the exposed portion of the housing; a second lens unit disposed in the housing and configured to magnify an image formed by light passing through the first lens unit as a function of a distance between the first lens unit and the second lens unit; and a moving unit connected to the first lens unit and the second lens unit and configured to move at least one of the first lens unit and the second lens unit in order to adjust the distance between the first lens unit and the second lens unit.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: June 6, 2017
    Assignee: LG Electronics Inc.
    Inventors: Jongpil Kim, Hakhae Kim, Dongjin Lee
  • Patent number: 9590533
    Abstract: A vibrational energy harvester having a base and a piezoelectric transducer formed from a layer of piezoelectric material and extending between a first end at the base and a second end. At least a portion of the piezoelectric transducer is arranged in a back and forth pattern between the first and second ends. A magnetic component provides a magnetic field within which at least a portion of the piezoelectric transducer operates so that it exhibits nonlinear behavior. A biomedical implantable device using the vibration energy harvester can extract energy from heartbeat waveforms (heartbeats) to thereby power a device within the body.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: March 7, 2017
    Assignee: The Regents of the University of Michigan
    Inventors: Daniel J. Inman, M. Amin Karami, David J. Bradley
  • Patent number: 9571150
    Abstract: An electronic device includes at least one screen. One or more bumpers are moveable between at least a stowed position where the bumper is flush or below the screen and a deployed position where at least a portion of the bumper projects above the screen. One or more sensors detect when the electronic device is subject to one or more drop events. When a drop event is detected, the bumper moves to the deployed position, protecting the screen. In various implementations, the bumper may be moveable by a push-push mechanism or a magnet assisted actuator mechanism. In other implementations, the bumper may include piezoelectric material to which voltage can be applied to move the bumper.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: February 14, 2017
    Assignee: Apple Inc.
    Inventors: Emery A. Sanford, Wei Guang Wu, Sarah E. Carey, Matthew E. Lang
  • Patent number: 9533502
    Abstract: An electro-mechanical transducer element is disclosed. The electro-mechanical transducer element includes a first electrode formed on a substrate; an electro-mechanical transducer film formed on at least a part of the first electrode; and a second electrode formed on at least a part of the electro-mechanical transducer film. In at least one cross section of the electro-mechanical transducer film, a film thickness distribution shape is convex to the second electrode side.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: January 3, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Osamu Machida, Akira Shimofuku, Ryo Tashiro, Atsushi Takeuchi
  • Patent number: 9470910
    Abstract: A transparent lens microphone comprises (a) a refractive eyeglass lens; (b) a sound sensitive coating on an outer surface of the refractive lens; and (c) electrical contacts connected to the sound sensitive coating so as to provide an electrical analog signal representative of an acoustic signal striking the outer surface of the transparent lens microphone.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: October 18, 2016
    Assignee: Acoustic Vision, LLC
    Inventors: Elvin Fenton, O. Wendell McCracken
  • Patent number: 9445750
    Abstract: The invention relates to a heart rate measuring apparatus and a method, adapted for measuring a subject's (6) heart rate and/or heart rate variation. The heart rate measuring apparatus (1) comprises a holder (2) adapted for carrying a portion of a body part of the subject (6) lying on or resting against the holder (2), a motion sensor (4) operatively connected to the holder (2), wherein the holder (2) is adapted for being at least partly moveable in a horizontal direction relative to the ground (7), the motion sensor (4) being adapted for measuring a signal generated by a movement of the subject (6) at least partly in the horizontal direction. In this way, a reliable signal is obtained adapted for measuring the heart rate and/or heart rate variation of a subject while keeping the implementation costs low.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: September 20, 2016
    Inventors: Ronaldus Maria Aarts, Sidarto Bambang Oetomo
  • Patent number: 9422944
    Abstract: An opening at a first carbon fiber sheet is provided, the opening extending through the sheet from a first major surface to a second major surface, the opening defining two sides and a first end of a rectangular flap, a second end of the flap remaining rooted in the first carbon fiber sheet. A piezoelectric transducer is bonded to the first carbon fiber sheet, the transducer proximate to the second end of the flap. A controller including a signal generator is coupled to the piezoelectric transducer, the piezoelectric transducer to excite sympathetic vibration of the flap.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: August 23, 2016
    Assignee: DELL PRODUCTS, LP
    Inventors: Joohyun Woo, Deeder M. Aurongzeb
  • Patent number: 9368426
    Abstract: A piezoelectric fan includes a vibration plate one end of which in a length direction is supported in a fixed manner and the other end of which in the length direction is a free end; and piezoelectric elements, attached on at least one of front and back surfaces of the vibration plate. In an intermediate portion of the vibration plate in the length direction, a right-angle bent portion is provided, and a plurality of divided blades are defined by slits in an area of the vibration plate extending from the free end to a position located a predetermined distance from the bent portion toward the free end. The piezoelectric element is attached on the portion of the vibration plate between the fixed end and the bent portion. Hence, variations in resonant frequency among the blades are reduced and the blades are efficiently excited using a common piezoelectric element.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: June 14, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masayoshi Tanida, Midori Sunaga, Hiroaki Wada
  • Patent number: 9274601
    Abstract: The disclosure relates to a system for providing feedback signals to input signals provided to an electronic device is provided. The system comprises: a display; an input device; an input module to detect activation of the input device; and a input module to generate a feedback signal for the electronic device based on signals from the input module. In system, the input device is a transducer. The transducer may be a piezoelectric element and the input module may cause the transducer to vibrate upon receiving an activation signal from the input module.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: March 1, 2016
    Assignee: BlackBerry Limited
    Inventors: Perry Allan Faubert, Robert James Lowles, Edward Hui
  • Patent number: 9257629
    Abstract: In some embodiments, circuits for ultrasonic transducer element arrays are provided. In some embodiments, a circuit described herein comprises a first layer for receiving a transducer element array, a ground layer comprising at least one ground disposed over the first layer and a plurality of first vias corresponding to transducer elements of the array, the first vias extending through the first layer to the at least one ground and comprising first ends for receiving ground electrodes of the transducer elements and second ends electrically connected to the ground.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: February 9, 2016
    Assignee: TransducerWorks, LLC
    Inventors: Matthew Todd Spigelmyer, Derek Ryan Greenaway
  • Patent number: 9257631
    Abstract: A piezoelectric vibration element capable of reducing occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same are disclosed. The piezoelectric vibration element includes a plurality of electrode layers and a plurality of piezoelectric layers being stacked along a first direction, the piezoelectric vibration element having two surfaces that face each other to be at intervals in the first direction, and vibrating in bending mode in the first direction with an amplitude varying along a second direction perpendicular to the first direction according to input of an electric signal, one of the two surfaces having such a shape that a central portion thereof in a third direction perpendicular to the first direction and the second direction protrudes as compared with opposite end portions thereof in the third direction.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: February 9, 2016
    Assignee: Kyocera Corporation
    Inventors: Yasuhito Fujii, Satoru Iwasaki, Harumi Hayashi, Kenji Yamakawa
  • Patent number: 9246081
    Abstract: There is provided a method for manufacturing a piezoelectric element, the method having a step of polarizing the fired piezoelectric body while fixing at least two positions in a direction perpendicular to the polarization direction. The method is a means for obtaining a piezoelectric element provided with a thin and flat fired piezoelectric body with no warpage.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: January 26, 2016
    Assignee: NGK Insulators, Ltd.
    Inventors: Takao Ohnishi, Masayuki Uetani
  • Patent number: 9210514
    Abstract: A throat microphone includes a cantilevered piezoelectric device 1 having a fixed end 11 supported by a base 3 and a free end with an anchor 4 fixed thereto. The piezoelectric device 1 vibrates to output audio signals in response to vibrations of a throat. The fixed end is attached to the base 3 such that the piezoelectric device 1 vibrates parallel to the surface of the base 3. A gap is defined between the anchor 4 and the base 3. The gap is provided with a vibration absorber 5.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: December 8, 2015
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 9161113
    Abstract: A transparent lens microphone comprises (a) a refractive lens; (b) a sound sensitive coating on an outer surface of the refractive lens; and (c) electrical contacts connected to the sound sensitive coating so as to provide an electrical analog signal representative of an acoustic signal striking the outer surface of the transparent lens microphone.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: October 13, 2015
    Inventors: Elvin Fenton, O. Wendell McCracken
  • Patent number: 9123698
    Abstract: Methods, systems, and apparatuses are described for cooling electronic devices. The electrical device includes an integrated circuit die (IC) having opposing first and second surfaces, a plurality of interconnects on the second surface of the IC die that enable the IC die to be coupled to a substrate, and a flexural plate wave device. The flexural plate wave device is configured to generate a stream of air to flow across the electrical device to cool the IC die during operation of the IC die.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: September 1, 2015
    Assignee: Broadcom Corporation
    Inventors: Milind S. Bhagavat, Seyed Mahdi Saeidi, Tak Sang Yeung
  • Patent number: 9065036
    Abstract: Provided is a vibration-type driving apparatus comprising a vibrating body including an electro-mechanical energy conversion element and an elastic body to which the electro-mechanical energy conversion element is joined; and a flexible printed board connected to the electro-mechanical energy conversion element, wherein the flexible printed board includes a first region bonded to at least the location of an antinode portion of vibration of the vibrating body and a second region that is adjacent to the first region and that is not bonded to the electro-mechanical energy conversion element; the boundary portion between the first region and the second region is located at a node portion of the vibration of the vibrating body; and a gap is present between the second region and the vibrating body.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: June 23, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuyuki Araki
  • Publication number: 20150109650
    Abstract: The present invention relates to an actuator for moving a rigid element, e.g. an optical element such as minor, the element being mechanically coupled to a frame with a bendable coupling, wherein actuator elements are mounted on said coupling between the frame and element, the coupling and actuator elements being adapted to provide a movement to the element when subject to signal from a signal generator.
    Type: Application
    Filed: October 1, 2014
    Publication date: April 23, 2015
    Applicant: SINTEF
    Inventors: Thor Bakke, Ib-Rune Johansen, Andreas Vogl, Frode Tyholdt, Dag Thorstein Wang
  • Publication number: 20150097635
    Abstract: A piezoelectric multiplexer includes an actuator and multiple piezo-morph beams. The actuator includes an actuator conducting head and an actuator stem, and each piezo-morph beam includes a conducting beam contact head and a beam stem manufactured out of piezo-morph material. A control voltage is selectively applied to electrical contacts coupled to the beam stems to create a piezoelectric effect that bends the selected piezo-morph beam and creates an electrical connection between its contact head and the conducting head of the actuator. A control circuit with a controller signals which piezo-morph beam to connect to the actuator. This multi-piezo-morph-beam piezoelectric multiplexer can be affixed to the electrical terminals of different electrical components (e.g., a transistor) to create an electrical cell that can be manufactured on a semiconductor chip or in a microelectromechanical system (MEMS) device.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 9, 2015
    Inventors: Lizon Maharjan, Babak Fahimi, Daniel Christopher Dial, Joseph Hearron, Job Timothy Brunet, Arash Hassanpour Isfahani, Carlos Caicedo-Narvaez
  • Publication number: 20150082884
    Abstract: An actuator includes a multi-layer part having a multilayered piezoelectric part comprising a plurality of piezoelectric bodies and an electrode part connected to the multilayered piezoelectric part, and a support part displaceably supporting the multi-layer part. The multilayered piezoelectric part is polled in the same direction. One of the piezoelectric bodies expands or contracts in an opposite direction to another piezoelectric body.
    Type: Application
    Filed: June 30, 2014
    Publication date: March 26, 2015
    Inventors: Seung Mo LIM, Yun Sung KANG, In Young KANG, Jeong Suong YANG, Hwa Sun LEE
  • Patent number: 8981621
    Abstract: Described herein are transducers and their fabrication. The transducers convert between mechanical and electrical energy. Some transducers of the present invention include a pre-strained polymer. The pre-strain improves the conversion between electrical and mechanical energy. The present invention provides methods for fabricating electromechanical devices including one or more electroactive polymers.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: March 17, 2015
    Inventors: Ronald E. Pelrine, Roy D. Kornbluth, Qibing Pei, Seajin Oh, Jose P. Joseph
  • Publication number: 20150022058
    Abstract: A piezoelectric actuator includes a stacked body composed of internal electrodes and piezoelectric layers which are stacked on each other; and a surface electrode disposed on at least one of main surfaces of the stacked body so as to be electrically connected to the internal electrodes. The internal electrodes each includes a first electrode and a second electrode. The stacked body has an active section in which the first electrodes and the second electrodes of the internal electrodes are arranged so as to overlap each other in a stacking direction thereof, and an inactive section which is every section of the stacked body other than the active section. An internal electrode placed on a one-main-surface side of the internal electrodes is configured so that its end part situated near a boundary between the active section and the inactive section is curved toward the other main surface.
    Type: Application
    Filed: August 31, 2012
    Publication date: January 22, 2015
    Inventors: Takeshi Okamura, Shigenobu Nakamura
  • Patent number: 8922096
    Abstract: A piezo valve is actuated by way of at least one actuator which is formed by a piezoelectric bender transducer (12) having two piezo actuators (14, 16). An actuating method has the steps of generating an actuator control signal (out), which can be output at either one of the two piezo actuators (14, 16), depending on at least one actuating control signal (in), of detecting an electric measurement quantity at one of the piezo actuators (14, 16) which is currently not controlled (16), and of generating a vibration damping signal (fb) on the basis of the detected measurement quantity and use thereof for active vibration damping for the currently controlled piezo actuator (14).
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: December 30, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Stefan Beck, Michael Beuschel, Martin Ebel, Karl Krammel, Carsten Sensche
  • Patent number: 8901802
    Abstract: An energy harvesting device capable of harvesting multiple forms of energy. The device includes a base, a piezoelectric cantilever, and a carbon nanotube film. The piezoelectric cantilever includes a piezoelectric layer disposed between a top electrode and a bottom electrode. A proximate end of the piezoelectric cantilever is supported by the base. The base does not support a distal end of the piezoelectric cantilever. The piezoelectric cantilever is capable of converting vibration energy into electrical power. The carbon nanotube film is capable of absorbing electromagnetic radiation and thermal radiation, and thereafter transmitting heat to the piezoelectric layer. The piezoelectric layer is mechanically deformed in response to said heating, thereby generating electrical power.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: December 2, 2014
    Assignee: Louisiana Tech University Research Foundation, a division of Louisiana Tech University Foundation Inc.
    Inventor: Long Que
  • Patent number: 8896184
    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: Grant
    Filed: August 9, 2013
    Date of Patent: November 25, 2014
    Assignee: The Regents of The University of Michigan
    Inventors: Karl Grosh, Robert J. Littrell
  • Patent number: 8881370
    Abstract: Inertial sensor having a body with first and second cavities on opposite sides thereof, a sensing element in the first cavity, electronic circuitry in the second cavity, electrical conductors interconnecting the sensing element and the circuitry, and leads connected electrically to the circuitry and extending from the body for mounting the sensor and making connections with the circuitry.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: November 11, 2014
    Assignee: Custom Sensors & Technologies, Inc.
    Inventors: William Paul Berger, Mark Andrew Collins, Michael Thomas Frazee, Thad W. (Marc) Smith, Robert Albert Anderson, Stuart John Knowles, Victor Dragotti
  • Publication number: 20140319968
    Abstract: A piezoelectric drive element includes piezoelectric layers, electrode layers between the piezoelectric layers, and electrode layers as the surfaces of the laminated layers. The piezoelectric layers are arranged on the upper side and on the lower side with reference to the center in the thickness direction, and are polarized in opposite directions. The thicknesses of piezoelectric layers at the center which have the least displacement are the thickest. The thicknesses of the piezoelectric layers above and under the thickest piezoelectric layers decrease gradually in an outward direction. A piezoelectric sound-generating body is constructed by affixing the piezoelectric driving element to a support plate and supporting the piezoelectric driving element with a frame.
    Type: Application
    Filed: December 18, 2012
    Publication date: October 30, 2014
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Norikazu Sashida, Shigeo Ishii, Yoshiyuki Watanabe
  • Patent number: 8860284
    Abstract: A piezoelectric multiplexer includes an actuator and multiple bimorph beams. The actuator includes an actuator conducting head and an actuator stem, and each bimorph beam includes a conducting beam contact head and a beam stem manufactured out of bimorph material. A control voltage is selectively applied to electrical contacts coupled to the beam stems to create a piezoelectric effect that bends the selected bimorph beam and creates an electrical connection between its contact head and the conducting head of the actuator. A control circuit with a controller signals which bimorph beam to connect to the actuator. This multi-bimorph-beam piezoelectric multiplexer can be affixed to the electrical terminals of different electrical components (e.g., a transistor) to create an electrical cell that can be manufactured on a semiconductor chip or in a microelectromechanical system (MEMS) device.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: October 14, 2014
    Assignee: 19th Space Electronics
    Inventors: Babak Fahimi, Daniel Christopher Dial
  • Patent number: 8853916
    Abstract: A reconfigurable bi-stable device includes an elastically deformable panel laterally disposed between and connected to one or more mounting members directly or indirectly connected to opposing ends of the panel, with the panel maintained under compressive force along at least one vector extending between the opposing ends. The compressive force deforms the panel into a one of two stable deformed positions, with the device disposed such that the panel may be moved between each of the two stable deformed positions by application of manual force to one of two opposing faces of the panel. A first shape memory alloy (SMA) or piezo actuator member is connected to the panel, the actuator member being capable of moving the panel from a first one of the two stable deformed positions to a second one of the two stable deformed positions.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: October 7, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Alan L. Browne, Nancy L. Johnson, Geoffrey P. McKnight, Andrew C. Keefe, Guillermo A. Herrera
  • Patent number: 8845555
    Abstract: The present invention provides a sensor system for measuring an elastic modulus and a shear modulus and a method for using the sensor system to evaluate a tissue by determining the presence of and/or characterizing abnormal growths. The method involves applying a set of forces of different magnitudes to one or more locations of tissue, detecting the corresponding displacements due to said applied forces, determining the forces acting on those locations of tissue which are a combination of forces from the applied voltages and the countering forces from tissue deformation, obtaining the elastic modulus and/or shear modulus for a plurality of locations, and determining abnormal growth invasiveness, malignancy or the presence of a tumor from said elastic and/or shear moduli.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: September 30, 2014
    Assignees: Drexel University, Philadelphia Health & Education Corporation
    Inventors: Wan Y. Shih, Wei-Heng Shih, Hakki Yegingil, Ari D. Brooks
  • Patent number: 8847466
    Abstract: The present invention relates to a piezoelectric bimorph switch, specifically a cantilever (single clamped beam) switch, which can be actively opened and closed. Piezoelectric bimorph switch are known from the prior art. Such a switch may be regarded as an actuator. Actuators are regarded as a subdivision of transducers. They are devices, which transform an input signal (mainly an electrical signal) into motion. Electrical motors, pneumatic actuators, hydraulic pistons, relays, comb drive, piezoelectric actuators, thermal bimorphs, Digital Micromirror Devices and electroactive polymers are some examples of such actuators. The switch of the invention comprises piezoelectric stack layers (121, 122), which form a symmetrical stack, wherein an electric field is always applied in the same direction as the poling direction of the piezoelectric layers.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: September 30, 2014
    Assignee: NXP B.V.
    Inventors: Olaf Wunnicke, Klaus Reimann
  • Patent number: 8841820
    Abstract: A synthetic jet apparatus including a series of generally parallel spaced-apart bimorph piezoelectric plates defining first and second sets of fluid chambers. The chambers of the second set of fluid chambers are interleaved with the chambers of the first set of fluid chambers. The first and second sets of fluid chambers are in fluid communication with sources of first and second fluids, respectively, the source of the first fluid being separate from the source of the second fluid. The bimorph plates are operable to alternately draw the first fluid from its source into the first set of fluid chambers while expelling the second fluid from the second set of fluid chambers, and then expel the first fluid from the first set of fluid chambers back into its source while drawing the second fluid from its source into the second set of fluid chambers.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: September 23, 2014
    Assignee: Lockheed Martin Corporation
    Inventors: Grover Bennett, Matthew Boespflug, Seyed Saddoughi
  • Patent number: 8841821
    Abstract: In an optical deflector including a mirror, a movable frame supporting the mirror, a support body surrounding the movable frame, and a first group of piezoelectric actuators and a second group of piezoelectric actuators alternating with the first group of piezoelectric actuators, a driver combines first and second original saw-tooth waves having the same waveform into first saw-tooth waves, and applies a first drive voltage having the first saw-tooth waves to the first group of piezoelectric actuators. The driver applies a second drive voltage having second saw-tooth waves opposite in phase with the first saw-tooth waves to the second group of piezoelectric actuators.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: September 23, 2014
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Takanori Aimono
  • Patent number: 8829765
    Abstract: A piezoelectric actuator device includes a substrate anchor region; a support beam arrangement having first and second ends, wherein the first end is fixed to the anchor region and the second end is freely suspended; first and second beams having first and second ends, wherein the first end of each beam is mechanically fixed to at least a part of the second end of the support beam arrangement and the second end of each beam is freely suspended; a coupling beam mechanically coupling the second end of the first and second beams; wherein the first and second beams are arranged such that the first end of the support beam arrangement is located between the coupling beam and the second end of the support beam arrangement.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: September 9, 2014
    Assignee: Agency for Science, Technology and Research
    Inventor: Min Tang
  • Patent number: 8816570
    Abstract: A dual cantilever beam relaxor-based piezoelectric single crystal accelerometer is provided. A flexural sensing structure is provided that employs at least two piezoelectric cantilever beams having their longitudinal axes disposed in a substantially parallel arrangement with each beam containing at least one relaxor-based single crystal transduction element having its polarization axis substantially perpendicular to the longitudinal axis of the beam. One end is mounted to a rigid base and the other end can be mounted to a seismic proof-mass or can be free, wherein the base is subjected to dynamic excitation from either mechanical or acoustical origin. The flexible sensing structure can optionally be encapsulated in a viscoelastic material having a mechanical compliance and loss that is substantially greater than that of the flexible sensing structure.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: August 26, 2014
    Assignee: Applied Physical Sciences Corp.
    Inventor: James A. McConnell
  • Patent number: 8806727
    Abstract: A method of forming a piezoelectric actuator on a vibration plate to provide a driving force to each of a plurality of pressure chambers includes forming a lower electrode on the vibration plate, forming a piezoelectric layer on the lower electrode at a position corresponding to each of the pressure chambers, forming a supporting pad on the lower electrode, the supporting pad contacting one end of the piezoelectric layer and extending away from the one end of the piezoelectric layer, forming an upper electrode extending from a top surface of the piezoelectric layer to a top surface of the supporting pad, and bonding the upper electrode to a driving circuit above the supporting pad to receive a voltage from the driving circuit.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: August 19, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Tae-kyung Lee, Jae-woo Chung, Kyo-yeol Lee, Hwa-sun Lee, Seung-mo Lim, Jae-chang Lee
  • Patent number: 8792417
    Abstract: A system is provided that provides a voice call service over a Circuit Switching (CS) domain to a User Equipment (UE) that was receiving a service in a Packet Switching (PS) domain. A Mobile Management Entity (MME) sends a paging message to the UE to provide a service in the CS domain. The MME sends a suspend request message requesting suspension of the service being provided to the UE in the PS domain, upon receiving a report message indicating that the UE has switched to the CS domain. A gateway suspends the service in the PS domain upon receiving the suspend request message from the MME.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: July 29, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Tae-Sun Yeoum, Beom-Sik Bae, Sung-Ho Choi, Hyoung-Kyu Lim, Han-Na Lim
  • Publication number: 20140167562
    Abstract: Provided is piezoelectric/electrostrictive body generating large electric-field-induced strain, and having high durability with respect to an electric field having a direction opposite to a polarization direction. A composition of piezoelectric/electrostrictive ceramics is represented by a general formula Pba{ZnbSbc(ZrdTi1-d)1-b-c}O3. As for a, b, c, and d, 0.985?a?0.998, 0.010?b?0.040, 0.025?c?0.090, 0.460?d?0.510, and 2.125?c/b?3.000 are satisfied. An accessory component containing at least one element selected from the group consisting of Mn, Cr, Fe, and a rare-earth element may be added to a main component. An additive amount of the at least one element relative to 100 parts by weight of the main component is 0.3 parts by weight or less in terms of an oxide.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 19, 2014
    Applicant: NGK Insulators, Ltd.
    Inventor: Tomohiko HIBINO
  • Patent number: 8749121
    Abstract: A piezoelectric power generating device is provided which is capable of extracting a large amount of power without an increase in device size, even when applied with vibration of low frequency or weak external force, and which is easy to manufacture. The piezoelectric power generating device includes a piezoelectric power generating plate including a piezoelectric plate having a polarized regions that are different in polarization direction, and a support member attached to the piezoelectric power generating plate. Further, the piezoelectric power generating plate includes a fixed portion fixed to the support member, a free end displaced relative to the fixed portion when an external forced, such as a vibration forced, is applied, and a cutout located between the fixed portion and the free end.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: June 10, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Katsumi Fujimoto
  • Publication number: 20140125201
    Abstract: A micro-electrical-mechanical systems (MEMS) device includes a substrate, one or more anchors formed on a first surface of the substrate, and a piezoelectric layer suspended over the first surface of the substrate by the one or more anchors. A first electrode may be provided on a first surface of the piezoelectric layer facing the first surface of the substrate, such that the first electrode is in contact with a first bimorph layer of the piezoelectric layer. A second electrode may be provided on a second surface of the piezoelectric layer opposite the first surface, such that the second electrode is in contact with a second bimorph layer of the piezoelectric layer.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 8, 2014
    Applicant: RF Micro Devices, Inc.
    Inventor: Kushal Bhattacharjee
  • Patent number: 8713789
    Abstract: A method of manufacturing a microphone comprising a substrate, a transducer element that is mounted on a top side of the substrate, a covering layer that covers the transducer element and forms a seal with the top side of the substrate, a shaped covering material that covers the substrate, the transducer element and the covering layer, and a sound opening that extends through the covering material and the covering layer. Methods for manufacturing a microphone and for manufacturing a plurality of microphones are also disclosed.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: May 6, 2014
    Assignee: Epcos AG
    Inventors: Anton Leidl, Wolfgang Pahl
  • Patent number: 8710716
    Abstract: An actuator includes: a diaphragm having a thickness equal to or greater than 0.5 ?m and equal to or less than 20 ?m; a piezoelectric body layer which is provided on a first surface side of the diaphragm, and receives stress from the diaphragm; a pair of electrodes which is provided on the first surface side of the diaphragm together with the piezoelectric body layer, and is mutually opposing via the piezoelectric body layer; and a stress adjusting layer which is provided on a second surface side of the diaphragm on an opposite side to the first surface of the diaphragm, and receives stress from the diaphragm in a same direction as the stress that the piezoelectric body layer receives from the diaphragm.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: April 29, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Takamichi Fujii, Yasutoshi Hirabayashi
  • Publication number: 20140104722
    Abstract: Apparatus for positioning a control object, such as a microactuator used to position a read/write transducer adjacent a data storage medium. In accordance with some embodiments, a piezoelectric transducer (PZT) element is adapted to induce rotational displacement of the control object in a bending mode of operation. The PZT element has a plurality of piezoelectric material layers and a plurality of electrically conductive layers interposed between the piezoelectric material layers. The piezoelectric material layers include a first subset of active layers and at least one non-active layer.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 17, 2014
    Applicant: Seagate Technology LLC
    Inventors: John S. Wright, Razman Zambri
  • Patent number: 8669690
    Abstract: Provided is a piezoelectric sound generating device capable of obtaining a stable connection state of lead-out conductors constituted of a conductive resin layer. A piezoelectric sound generating device 10, wherein lead-out conductors 18a, 18b are so flatly formed as to extend from surface electrodes 11a, 11b1 of a piezoelectric element 11 exposed to first openings 13a1, 13b1 to terminal electrodes 15a, 15b of a terminal portion 15 exposed to second openings 13a2, 13b2 on one main surface side of a diaphragm 12, respectively. As a result, the surface electrode 11a1 of the piezoelectric element 11 and the terminal electrode 15a of the terminal portion 15, and also the surface electrode 11b1 and a surface electrode 11c of the piezoelectric element 11, and the terminal electrode 15b of the terminal portion 15 are conductively connected. Hence, poor connection caused by cracks or the like is not likely to occur in the lead-out conductors.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: March 11, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Shigeo Ishii, Norikazu Sashida, Yoshiyuki Watanabe
  • Patent number: 8661650
    Abstract: A method of making a handheld, electromechanical device useful in mammalian body-care includes the steps of: a) forming a one-piece housing having a single opening defined by a rim; b) assembling a unitary insert; c) inserting the unitary insert through the single opening of the housing; d) removably applying a cover having an exterior surface to close the opening of the one-piece housing; and e) attaching the unitary insert to at least one of the one-piece housing and the removable cover. The rim of the one-piece housing circumscribes a rim area, and the one-piece housing has a projected area that is substantially larger than the rim area. The unitary insert is dimensioned to be insertable through the opening defined by the rim, and it has a frame having disposed thereon electromechanical elements interconnected in an electrical circuit. The cover closes off the opening of the one-piece housing.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: March 4, 2014
    Assignee: Johnson & Johnson Consumer Companies, Inc.
    Inventors: Jorge M. Da Silva, Emanuel P. Morano, John Rytel
  • Patent number: 8659211
    Abstract: An electro-mechanical transducer is disclosed, which provides a very low frequency wide band response from a bender (or benders) using piezoelectric cantilevers or center mounted free edge disc, providing additive output between the resonant frequencies achieving this response at great depths under equivalent free flooded conditions with additionally improved response with silicone rubber to reduce the acoustic cancellation associated with the dipole mode of vibration of the bender.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: February 25, 2014
    Assignee: Image Acoustics, Inc.
    Inventors: John L. Butler, Alexander L. Butler
  • Publication number: 20130328447
    Abstract: An actuator using an electro-active polymer is provided. The actuator includes a vibration plate fixed to an electronic device; at least one electro-active polymer attached to the vibration plate, and activated when electric voltage is applied thereto; and at least one mass joined to at least one a combination member disposed on the vibration plate.
    Type: Application
    Filed: June 10, 2013
    Publication date: December 12, 2013
    Inventors: Jin-Hyoung PARK, Yu-Dong Bae, Eun-Hwa Lee, Dae-Kwang Jung, Ji-Hoon Jung