More Than One Poling Direction (e.g., Rosen Transformer) Patents (Class 310/359)
  • Patent number: 10531552
    Abstract: A device for generating an atmospheric-pressure plasma is disclosed. In an embodiment the device includes a piezoelectric transformer comprising an input region and an output region, wherein the input region is designed to convert an applied alternating voltage into a mechanical oscillation, wherein the output region is designed to convert a mechanical oscillation into a voltage, and wherein the output region adjoins the input region in a longitudinal direction, a contact element fastened to the piezoelectric transformer, the contact element being designed to apply the alternating voltage to the input region and a holder, wherein the contact element is connected to the holder by a form-fit connection, in such a manner that a movement of the piezoelectric transformer in the longitudinal direction, relative to the holder, is prevented.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: January 7, 2020
    Assignee: EPCOS AG
    Inventors: Pavol Kudela, Franz Rinner, Markus Puff
  • Patent number: 10288876
    Abstract: This optical scanning actuator can improve yield and assembly efficiency. An optical scanning actuator (10) includes a piezoelectric element (14) that is joined to a displaceably supported emission end (11a) of an optical fiber (11) and displaces the emission end (11a) in a direction perpendicular to an optical axis direction of the optical fiber (11) by expanding and contracting in the optical axis direction. The piezoelectric element (14) includes an identifier (16) for identifying a polarization direction, the identifier (16) being formed physically.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: May 14, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Masato Fujiwara, Morimichi Shimizu
  • Patent number: 9941857
    Abstract: A spur cancelling, electromechanical filter includes a first resonator having a first resonant frequency and one or more first spurious responses, and it also includes, electrically connected to the first resonator, a second resonator having a second resonant frequency and one or more second spurious responses. The first and second resonant frequencies are approximately identical, but the first resonator is physically non-identical to the second resonator. The difference between the resonators makes the respective spurious responses different. This allows for filters constructed from a cascade of these resonators to exhibit reduced spurious responses.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: April 10, 2018
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Roy H. Olsson, Vincent M. Hietala
  • Patent number: 9847472
    Abstract: A piezoelectric transformer that includes a piezoelectric body having driving portions and a power generating portion, an input electrode, and an output electrode. The driving portions and the power generating portion are arranged in the lengthwise direction of the piezoelectric body. The driving portions are disposed symmetrically relative to a plane that passes through a center of the piezoelectric body in the lengthwise direction and is orthogonal to the lengthwise direction, occupy no less than half of the regions in the piezoelectric body, and are include two or more adjacent polarized regions.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: December 19, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Hiroshi Asano
  • Patent number: 9581810
    Abstract: A piezoelectric actuator includes a plurality of piezoelectric layers, a plurality of electrodes between which each of the piezoelectric layers is placed so that the electrodes and the piezoelectric layers alternate with each other, and a substrate on which the plurality of piezoelectric layers and the plurality of electrodes are formed.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: February 28, 2017
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Hisanori Aga, Ayu Sugiyama
  • Patent number: 9513652
    Abstract: A power multiplier and method are provided. The power multiplier includes a power multiplying network that is a multiply-connected, velocity inhibiting circuit constructed from a number of lumped-elements. The power multiplier also includes a launching network, and a directional coupler that couples the launching network to the power multiplying network. The power multiplier provides for power multiplication at nominal power generation frequencies such as 50 Hertz, 60 Hertz, and other power frequencies, in a compact circuit.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: December 6, 2016
    Assignee: CPG Technologies, LLC
    Inventor: James F. Corum
  • Patent number: 9515369
    Abstract: A system for power smoothing in power distribution and methods are provided. In one embodiment, a power multiplying network is provided that comprises a multiply-connected, velocity inhibiting circuit constructed from a number of lumped-elements. The power multiplying network is coupled to a power distribution network. The power multiplying network is configured to store power from and supply power to the power distribution network.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: December 6, 2016
    Assignee: CPG Technologies, LLC
    Inventor: James F. Corum
  • Patent number: 9497806
    Abstract: A power transformation apparatus between DC light element and ballast is provided, including: a first inductance, a second inductance, and a rectifier module. The first inductance includes a first input end and a second input terminal, and at least one of the first input terminal and the second input terminal is electrically connected to an output terminal of the ballast. The second inductance has a third input terminal and a fourth input terminal, and at least one of the third input terminal and the fourth input terminal is electrically connected to another output end of the ballast. The rectifier module has two input terminals, and the two input terminals are electrically connected to the first inductance and the second inductance, respectively. The rectifier module inputs a rectified direct current, so as to provide the electricity to the DC light elements. When the ballast is electrical ballast, the impedance value of the first inductance and the second inductance are between 150? and 800?.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: November 15, 2016
    Inventors: Yu Lin Lee, Lin Kan Weng
  • Patent number: 9184368
    Abstract: A film-type piezoelectric/electrostrictive element which is a fired object includes a body part, a pair of side-surface electrodes and an electrode exposed surface. The body part has n+1 layered piezoelectric/electrostrictive films and n layered internal electrode layer(s). The piezoelectric/electrostrictive films are composed of ceramic. The piezoelectric/electrostrictive films and the internal electrode layer(s) are stacked in an alternating manner. The n is an integer equal to 1 or more. The pair of side-surface electrodes is positioned on two opposing side surfaces of the body part. The two opposing side surfaces extend in a stacking direction of the body part. The internal electrode layer(s) is/are exposed on an electrode exposed surface of the body part. The electrode exposed surface extends in the stacking direction. An electrode exposure ratio of the internal electrode layer(s) on the electrode exposed surface as defined by Formula (1) being more than 0% and less than or equal to 10%.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: November 10, 2015
    Assignee: NGK Insulators, Ltd.
    Inventors: Kohji Shibayama, Haruhiko Ito
  • Patent number: 8973229
    Abstract: A method for manufacturing a composite piezoelectric substrate in which a piezoelectric substrate and a supporting substrate are prepared, ions are implanted in the piezoelectric substrate to form a defective layer at a predetermined depth in the piezoelectric substrate, impurities that are adhered to a surface of the piezoelectric substrate or a surface of the supporting substrate are removed to expose the constituent atoms thereof and to activate the surfaces, the supporting substrate is bonded to the piezoelectric substrate to form a bonded substrate body, the bonded substrate body is separated at the defective layer so that a separation layer between the surface of the piezoelectric substrate and the defective layer is separated from the piezoelectric substrate and bonded to the supporting substrate to form a composite piezoelectric substrate, and the surface of the separation layer of the composite piezoelectric substrate is smoothed.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 10, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hajime Kando, Yoshiharu Yoshii
  • Patent number: 8905934
    Abstract: Object is that an output sound pressure at transmission or an output voltage at reception of a predetermined higher resonance component becomes higher than those of the primary resonance component. The piezoelectric material layer 24 has an electrode on the surface of the piezoelectric material of between the layer and both ends, and outputs and inputs an electrical signal with this electrode. The piezoelectric material 24 has a remanent polarization in a thickness direction, the relationship of the (4P+1)th layer piezoelectric material from fixed end side is used as the basic relationship, piezoelectric materials are periodically arranged so that piezoelectric materials of (4p+2)th and (4p+3)th layer each has an opposite relationship, and (4p+4)th layer has the same relationship as the basic relationship.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: December 9, 2014
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventor: Yuichi Nishikubo
  • Patent number: 8866367
    Abstract: A method for forming an electrical device having a {100}-textured platinum electrode comprising: depositing a textured metal thin film onto a substrate; thermally oxidizing the metal thin film by annealing to convert it to a rocksalt structure oxide with a {100}-texture; depositing a platinum film layer; depositing a ferroelectric film. An electrical device comprising a substrate; a textured layer formed on the substrate comprising metal oxide having a rocksalt structure; a first electrode film layer having a crystallographic texture acting as a template; and at least one ferroelectric material layer exhibiting spontaneous polarization epitaxially deposited on the first electrode film layer whereby the rocksalt structure of the textured layer facilitates the growth of the first electrode film layer with a {100} orientation which forms a template for the epitaxial deposition of the ferroelectric layer such that the ferroelectric layer is formed with an {001} orientation.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: October 21, 2014
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Glen R. Fox, Ronald G. Polcawich, Daniel M. Potrepka
  • 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
  • Publication number: 20140265624
    Abstract: A piezoelectric transformer includes a rectangular plate-shaped piezoelectric board having a length L in a longitudinal direction. In the piezoelectric board, five regions having a length L/5 are formed. In the two of regions, inner electrodes are formed in a thickness direction and conducted to outer electrodes provided in these regions. In a third region, outer electrodes are provided. The two regions of the piezoelectric board are polarized in the thickness direction, and two adjacent regions thereof are polarized in the longitudinal direction, and the third region is non-polarized. When a voltage is applied to the outer electrodes, the piezoelectric board expands and contracts in the longitudinal direction due to a piezoelectric effect. Thus, a piezoelectric transformer which enables high-efficient energy conversion even when a driving frequency is increased and a wireless power transmission system using the piezoelectric transformer are provided.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Keiichi Ichikawa, Takaaki Asada, Takashi Kawada
  • Patent number: 8829766
    Abstract: An acoustic wave resonator device comprising a resonant layer that comprises a series of side-by-side areas of first and second dielectric materials. In one embodiment the first dielectric material is a piezoelectric, in particular the first dielectric material can be a piezoelectric and the second dielectric material can be non-piezoelectric. In another embodiment, the first dielectric material is a piezoelectric of first polarity and the second dielectric material is a piezoelectric of opposite polarity or different polarity. Where needed, the resonant layer is supported on a reflector composed of series of layers of high acoustic impedance material(s) alternating with layers of low acoustic impedance material(s). For example, the reflector comprises AlN, Al2O3, Ta2O5, HfO2 or W as high impedance material and SiO2 as low impedance material.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: September 9, 2014
    Assignee: Epcos AG
    Inventors: Evgeny Milyutin, Paul Muralt
  • Publication number: 20140132118
    Abstract: Multilayered piezoelectric transformers, transformer elements and methods of constructing piezoelectric transformers are disclosed.
    Type: Application
    Filed: October 5, 2012
    Publication date: May 15, 2014
    Inventors: Ross W. Bird, William M. Bradley, Gareth J. Knowles
  • Patent number: 8720024
    Abstract: A method for processing a ring type piezoelectric device comprises: providing a ring type piezoelectric embryo; printing at least a pair of electrodes to divide the ring type piezoelectric embryo into a plurality of equal sections; and immersing the divided ring type piezoelectric embryo into high temperature silicon oil with high voltage for polarization so as to make the polarization of the ring type piezoelectric device perpendicular to a cross-section thereof.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: May 13, 2014
    Assignee: Chung-Yuan Christian University
    Inventors: Yung Ting, Sheuan-Perng Lin
  • Patent number: 8710761
    Abstract: The invention relates to a circuit arrangement (20) for a piezo transformer (22) comprising a driver circuit (23), to which the piezo transformer (22) can be connected, and a current sensor (21) for the determining an incoming power signal (IM), which is subject to an incoming current (IE) flowing through the piezo transformer (22). The invention further relates to the circuit arrangement (20) of a control unit (24) for providing a control signal (ST), which is subject the incoming power signal (IM); and an oscillator (25) having an oscillator output (43) for emitting an oscillator signal (SO) to a driver signal input (44) of the driver circuit (23) subject to the control signal (ST).
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: April 29, 2014
    Assignee: AMS AG
    Inventors: Manfred Pauritsch, Peter Trattler
  • Patent number: 8686619
    Abstract: A piezoelectric actuator is provided, including a piezoelectric layer which is joined to a joining member and which has a coefficient of linear expansion smaller than a coefficient of linear expansion of the joining member; a first electrode which is arranged on one surface of the piezoelectric layer; a second electrode which is arranged on a portion of the one surface of the piezoelectric layer different from the first electrode and which is in conduction with the first electrode; and a low dielectric layer which is formed between the piezoelectric layer and the second electrode and which has a dielectric constant lower than a dielectric constant of the piezoelectric layer.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: April 1, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Taiki Tanaka, Keiji Kura
  • Publication number: 20130278115
    Abstract: Multilayered piezoelectric transformers, transformer elements and methods of constructing piezoelectric transformers are disclosed.
    Type: Application
    Filed: October 5, 2012
    Publication date: October 24, 2013
    Inventors: Ross W. Bird, William M. Bradley, Gareth J. Knowles
  • Patent number: 8456061
    Abstract: A piezoelectric thin film device comprises a piezoelectric thin film having upper and lower surfaces and a defined tilted crystal morphology, a top electrode disposed on the upper surface, a substrate having a surface morphology that corresponds to the defined crystallographically tilted morphology, and a bottom electrode disposed between and crystallographically linked to both the lower surface of the piezoelectric thin film and the substrate surface, the bottom and top electrodes having a parallel planar configuration relative to the plane of the substrate and the defined crystallographically tilted morphology having a crystallographic c-axis direction oriented at a >0° angle relative to the normal to the plane of the electrodes; and method of making the device.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: June 4, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Brady J. Gibbons, Chris Shelton, Peter Mardilovich, Tony S. Cruz-Uribe
  • Patent number: 8421559
    Abstract: The present invention relates to the field of acoustic wave devices, and particularly to that of transducers capable of operating at very high frequencies, from a few hundred MHz to several gigahertz, and its subject is more particularly an interface acoustic wave device including at least two substrates and a layer of ferroelectric material, the latter being contained between a first electrode and a second electrode and having first positive-polarization domains and second negative-polarization domains, the first and second domains being alternated, wherein the assembly constituted by the first electrode, the layer of ferroelectric material, and the second electrode is contained between a first substrate and a second substrate.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: April 16, 2013
    Assignees: Etat Francais Represente par le Delegue General pour l'Armement, Centre Nationale de Recherche Scientifique, Université de Franche Comte
    Inventors: Roger Petit, Sylvain Ballandras, Emilie Courjon, Dorian Gachon
  • Patent number: 8410668
    Abstract: A crystal oriented ceramic composite body is provided, including a substrate that has a first surface and a second surface, and a {100} oriented ceramic film that is disposed to face the first surface. The {100} oriented ceramic film includes a first sectional surface. The first sectional surface is perpendicular to the first surface, and a 90 degree domain includes a domain wall within a range of ±20 degrees of a normal to the first surface and occupies a surface area of at least ? of the first sectional surface.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: April 2, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takaaki Koizumi, Takuya Katsuno
  • Patent number: 8395303
    Abstract: To provide a piezoelectric transformer which can reduce the capacity of an input unit and realize a impedance matching with a drive circuit of an input side. A piezoelectric transformer includes: a piezoelectric substrate (11) having both main surfaces of a rectangular shape; and input side electrodes (12, 13, 15, 16) and output side electrodes (14, 17) formed on the both main surfaces of the piezoelectric substrate (11). A pair of opposing input side electrodes (12, 13, 15, 16) are arranged on the both surfaces of the piezoelectric substrate (11) in the first input unit (A1) and the second input unit (A2). At least one of the pair of input side electrodes (12, 13, 15, 16) is a partial electrode arranged at the center portion of the main surface of the piezoelectric substrate (11) in the first input unit (A1) and the second input unit (A2).
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: March 12, 2013
    Assignee: KYOCERA Corporation
    Inventors: Kenichi Yoshimura, Michiaki Nishimura
  • Patent number: 8379411
    Abstract: The present invention relates to voltage transformers, comprising multi-layer structures of piezoelectric ceramics, so-called piezoelectric transformers. The present invention further relates to switched mode power supplies, comprising such a piezoelectric transformer as part of a piezoelectric converter. The piezoelectric transformer according to the invention comprises a primary-side electrode arrangement (102) that can be connected to the primary-side voltage, a secondary-side electrode arrangement (104) on which the secondary-side voltage can be tapped, and an auxiliary electrode arrangement (106) for creating an auxiliary electrode voltage proportional to the secondary-side voltage, wherein the auxiliary electrode arrangement (106) is formed by at least two plane electrodes located opposite one another.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: February 19, 2013
    Assignee: Flextronics AP, LLC
    Inventors: Michael Bothe, Stefan Mörbe
  • Patent number: 8336192
    Abstract: A method of collective fabrication of remotely interrogatable sensors, wherein the method may include fabricating fabricating a first series of first resonators exhibiting a first resonant frequency at ambient temperature and a first static capacitance and fabricating a second series of second resonators exhibiting a second resonant frequency at ambient temperature and a second static capacitance. The method may also include performing a series of electrical measurements of the set of the first series of first resonators and of the set of the second series of second resonators, so as to determine first pairs and second pairs of resonant frequency and of capacitance of each of the first and second resonators and performing a series of matching of a first resonator and of a second resonator.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: December 25, 2012
    Assignee: Senseor
    Inventors: Jean-François Leguen, Luc Chommeloux
  • Patent number: 8327522
    Abstract: The invention relates to a process for the collective fabrication of a remotely interrogable sensor having at least one first resonator and one second resonator. Each resonator exhibits respectively a first and a second operating frequency. A first series of first resonators are fabricated. The first resonators each have a first operating frequency belonging to a first set of frequencies centered on a first central frequency. A second series of second resonators are fabricated. The second resonators each having a second operating frequency belonging to a second set of frequencies centered on a second central frequency. A series of pairings of a first resonator and of a second resonator are conducted so as to form pairs of resonators exhibiting a difference of operating frequencies which is equal to the difference of the first and second central frequencies.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: December 11, 2012
    Assignee: Senseor
    Inventors: Luc Chommeloux, Raphael Lardat, Sylvain Ballandras
  • Patent number: 8299686
    Abstract: An actuator with a sensor, including an actuator having a pair of electrodes and an ionic conduction layer present between the pair of electrodes, and a sensor having electrodes and an electromechanical conversion element. When the actuator is deformed, the sensor is also deformed. The relationship between the modulus of elasticity (A) of the actuator and the modulus of elasticity (S) of the sensor satisfies S<A.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: October 30, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Yamamoto, Sotomitsu Ikeda
  • Patent number: 8266773
    Abstract: A method of manufacturing a piezoelectric actuator includes a first polarization of a piezoelectric body; polishing the piezoelectric body; first heating step of heating the piezoelectric body to a temperature which is not lower than a Curie point of the piezoelectric body and performing a re-polarization of the piezoelectric body in a second polarization of the piezoelectric body having been heated in the first heating step.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: September 18, 2012
    Assignee: FUJIFILM Corporation
    Inventor: Ryuji Tsukamoto
  • Patent number: 8174169
    Abstract: A piezoelectric transformer with a body that includes a first functional part and a second functional part is disclosed. The second functional part has inner electrodes, located in the body, which are connected to outer electrodes of this part. The first outer electrode of the first functional part is arranged parallel to the inner electrodes of the second functional part, wherein the minimum distance between the first outer electrode of the first functional part and the respective outer electrodes of the second functional part is selected greater than the distance between the first outer electrode of the first functional part and a terminal inner electrode of the second functional part facing it.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: May 8, 2012
    Assignee: EPCOS AG
    Inventors: Christian Hoffmann, Igor Kartashev
  • Publication number: 20110291530
    Abstract: A crystal oriented ceramic composite body including a substrate that has a first surface and a second surface, and a {100} oriented ceramic film that is disposed to face the first surface. The {100} oriented ceramic film includes a first sectional surface. The first sectional surface is perpendicular to the first surface, and a 90 degree domain includes a domain wall within a range of ±20 degrees of a normal to the first surface and occupies a surface area of at least ? of the first sectional surface.
    Type: Application
    Filed: May 31, 2011
    Publication date: December 1, 2011
    Applicant: NGK Insulators, Ltd.
    Inventors: Takaaki KOIZUMI, Takuya Katsuno
  • Patent number: 7982372
    Abstract: A piezoelectric transformer includes: a piezoelectric transducer on whose outer surface an electrode is formed; a case housing the piezoelectric transducer; a terminal disposed to face the electrode; an elastic member in contact with both the electrode and the terminal in the case and having conductivity to bring the electrode and the terminal into mutual continuity; and a folder formed in the case and fixedly holding the elastic member to press-fit the elastic member between the electrode and the terminal.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: July 19, 2011
    Assignee: Tamura Corporation
    Inventors: Akio Machida, Ryo Nakagawa, Yasuhide Matsuo
  • Patent number: 7932663
    Abstract: Disclosed herein is a piezoelectric transformer having a pinwheel-type electrode. The piezoelectric transformer of the present invention includes a body, an upper electrodes and a lower electrode. The body is formed in a circular planar shape and is made of a piezoelectric material. The upper electrodes are formed to be adjacent to one of first and second planes corresponding to upper and lower surfaces of the body, formed in the same planar shape as that of the body, and formed to be separated in the shape of a pinwheel. In the upper electrodes, input voltage is applied to some of separate electrodes, and output voltage is obtained from the remaining electrodes. The lower electrode is adjacent to a plane opposite the plane on which the upper electrode is formed, the lower electrode being formed in the same planar shape as that of the body.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: April 26, 2011
    Assignees: Inova Inc., Santoma Ltd.
    Inventors: Tae-Shik Yoon, Man-Sun Yun
  • Patent number: 7893603
    Abstract: An apparatus for determining and/or monitoring a process variable of a medium. The apparatus includes: An oscillatable unit secured on a membrane; a sending/receiving unit, which excites the membrane and the oscillatable unit to oscillate and which receives oscillations of the oscillatable unit. The sending/receiving unit is a disk-shaped, piezoelectric element. The apparatus further includes a control/evaluation unit, which, on the basis of oscillations of the oscillatable unit, monitors and/or determines the process variable. The disk-shaped, piezoelectric element has segments, which are essentially polarized oppositely to one another, and at least two electrodes of opposite polarity are applied to the side of the disk-shaped, piezoelectric element facing away from the membrane.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: February 22, 2011
    Assignee: Endress + Hauser GmbH + Co. KG
    Inventor: Sergej Lopatin
  • Patent number: 7723902
    Abstract: A piezoelectric transformer includes a base body. The base body includes an input part and an output part mechanically connected to the input part. The base body also includes internal electrodes perpendicular to a polarization axis of the transformer-in the input part and the output part. The transformer also includes an auxiliary electrode galvanically separated from the input part and the output part.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: May 25, 2010
    Assignee: EPCOS AG
    Inventors: Heinz Florian, Reinhard Gabl, Igor Kartashev, Patrick Schmidt-Winkel
  • Patent number: 7642697
    Abstract: Disclosed is an ultrasonic motor whose output is improved by enhancing the exciting force of a vibration caused on a vibrating body having a rectangular portion. The ultrasonic motor includes the vibrating body having a piezoelectric element, and a moving body which contacts the vibrating body. The phases of two difference vibrations caused on the vibrating body are changed to make the moving direction of the moving body or the vibrating body itself variable by selecting whether to apply a drive signal to first electrodes provided at one side of the piezoelectric element or to apply a drive signal to second electrodes provided at a portion whose polarization direction differs from that of the first electrodes.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: January 5, 2010
    Assignee: Seiko Instruments Inc.
    Inventors: Akihiro Iino, Satoshi Watanabe
  • Publication number: 20090309460
    Abstract: The present invention discloses an insulation piezoelectric transformer, wherein upper electrodes and corresponding lower electrodes are respectively formed on the upper surface and lower surface of a ceramic substrate to form the primary side and the secondary side. A high DC voltage is applied to the primary side and the secondary side to polarize the ceramic material in between the upper and lower electrodes. The unpolarized portion of substrate still keeps the properties of a ceramic material and functions as an insulator of the primary and secondary sides. Therefore, the present invention functions as an insulation piezoelectric transformer.
    Type: Application
    Filed: July 25, 2008
    Publication date: December 17, 2009
    Inventors: Tao-Chin Wei, Ming Shing Chou, Hsi Chen Chang
  • Patent number: 7613076
    Abstract: An acoustic power transformer includes: an input port adapted to receive an input signal; a transmitting acoustic transducer coupled to the input port and adapted to transmit an acoustic wave in response to the input signal received at the input port; a receiving acoustic transducer adapted to receive the acoustic wave and in response thereto to produce an output signal; an output port adapted to output the output signal; and an acoustic medium disposed in an acoustic wave propagation path between the transmitting acoustic transducer and the receiving acoustic transducer. In one case, at least one of the transmitting acoustic transducer and receiving acoustic transducer includes a Fresnel lens. In another case, the transformer includes an acoustic lens disposed in the acoustic wave propagation path between the transmitting acoustic transducer and the receiving acoustic transducer.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: November 3, 2009
    Assignee: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: John D. Larson, III, Michael L. Frank, Mark A. Unkrich, Stephen R. Gilbert
  • Patent number: 7608975
    Abstract: The magnetic device according to the invention is integrated on a substrate and comprises at least one element made of piezoelectric material associated with actuating electrodes, and at least one magnetic element able to deform under the stress of the piezoelectric material element. The device has the form of a beam movable with respect to the substrate, and comprises two transverse parts of predetermined width, along a reference longitudinal axis. The piezoelectric material element is formed by at least a part of a transverse part and each transverse part comprises a zone for mechanical anchoring on the substrate. The transverse parts are connected by at least one central branch, of predetermined width, on which the magnetic element is arranged.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: October 27, 2009
    Assignees: Commissariat a l'Energie Atomique, STMicroelectronics SA
    Inventors: Bastien Orlando, Bernard Viala, Sébastien Hentz
  • Patent number: 7598655
    Abstract: A piezoelectric transformer driving apparatus and a piezoelectric transformer driving method, wherein even if there exists a variation between piezoelectric transformers, no unnecessary resonant points occur in the vicinity of a frequency used, that is, the output is stable for the frequency. For this purpose, the primary electrodes (1b, 2a) of a pair of piezoelectric transformers (1, 2) that exhibit potentials of mutually different signs on their respective secondary sides are connected to each other, while the piezoelectric transformers (1, 2) are connected in series with an AC power supply. An input voltage is applied between the primary electrodes (1a, 2b), and the outputs are supplied to a load, whereby even if there exists a variation between the vibrations of the piezoelectric transformers, it results in only a single resonant point existing.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: October 6, 2009
    Assignee: Tamura Corporation
    Inventors: Yasuhide Matsuo, Akira Mizutani
  • Patent number: 7579760
    Abstract: A vibrator includes a vibrating body having a substantially quadrangular prism shape and including four side surfaces extending in the longitudinal direction of the vibrating body. A common electrode is formed on substantially an entire surface of one of the side surfaces of the vibrating body. Split electrodes extend in the longitudinal direction on another side surface opposite to the side surface on which the common electrode is formed, and are spaced from each other in the width direction of the side surface on which the split electrodes are formed. In the vibrating body, a first polarized section is polarized in a direction from the side surfaces of the vibrating body that do not have an electrode disposed thereon, toward the split electrodes. A second polarized section is polarized in a direction from the side surfaces of the vibrating body that do not have an electrode disposed thereon, toward the common electrode.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: August 25, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Katsumi Fujimoto
  • Patent number: 7550903
    Abstract: In a method and device for polarizing a piezoelectric actuator according to which high-frequency pulse voltages can be used for polarizing the actuators an actuator to be polarized is mounted between two retaining elements while connected in series to a second piezoelectric actuator. The retaining elements provide the actuator (1) with a desired pretension. A compensating element compensates for changes in length of the actuator (1) so that even in the event of high-frequency pulse voltages and thus high-frequency changes in length, the pretension can be maintained within a desired range of values. Preferably, the second piezoelectric actuator has the identical design of the first actuator and is polarized with the first actuator. This enables two piezoelectric actuators to be simultaneously polarized during a polarizing process.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: June 23, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernhard Döllgast, Roland Niefanger, Kord Witte
  • Patent number: 7548012
    Abstract: A piezoelectric measuring element (9) consists of at least two piezoelectric crystals (1) showing a transversal effect for the measurement of axially acting forces and/or pressures as well as to a pressure or force sensor comprising said element. The crystals (1) with transversal effect having an opposite polarization (4) to each other are attached to each other by means of a lateral electrode (12). In this manner, if n crystals (1) are attached to each other, a single multi-layer measuring element (9) is obtained with a stability under load which is n-times that of an individual crystal. Preferably, the electrodes extend alternately into the two force-absorbing end faces (3) of the crystals. Such measuring elements can be fabricated from wafers (15) in a cost-effective manner. A compact multi-layer measuring element prepared in this way can be easily mounted in a sensor, particularly a force or pressure sensor, without the risk of inclination.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: June 16, 2009
    Assignee: Kistler Holding, AG
    Inventors: Claudio Cavalloni, Kurt Vollenweider, Roland Sommer
  • Patent number: 7545080
    Abstract: A piezoactuator has at least one piezoelectric-active partial stack with piezoceramic layers arranged one over the other with piezoceramic material and electrode layers arranged between the piezoceramic layers, at least one piezoelectric-inactive terminating region arranged over the partial stack and at least one transition region between the partial stack and the terminating region, the partial stack, the terminating region and the transition region all connected together to give a monolithic complete stack. The transition region has a transition region stack with piezoceramic layers arranged one over the other and electrode layers arranged between the piezoceramic layers both have a form and are arranged on each other such that, in the stack direction of the transition region stack, from piezoceramic layer to piezoceramic layer there is a successive rotation about a main axis of the polarity and/or a rotation of the main axis of the electric control is provided.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: June 9, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Harald Johannes Kastl, Andreas Lenk, Carsten Schuh, Claus Zumstrull
  • Publication number: 20090085432
    Abstract: A self-poling piezoelectric based MEMS device is configured for piezoelectric actuation in response to application of a device operating voltage. The MEMS device comprises a beam, a first electrode disposed on the beam, a layer of piezoelectric material having a self-poling thickness disposed overlying a portion of the first electrode, and a second electrode overlying the layer of piezoelectric material. The layer of piezoelectric material is self-poled in response to application of the device operating voltage across the first and second electrodes. In addition, the self-poled piezoelectric material has a poling direction established according to a polarity orientation of the device operating voltage as applied across the first and second electrodes.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventor: Lianjun Liu
  • Patent number: 7504765
    Abstract: A small, thin, light piezoelectric transformer capable of large-capacity output is provided at low cost. In piezoelectric transformers adjacent to each other in the row direction, a lower electrode extends in the column direction in a supporting substrate, so as to connect a plurality of piezoelectric transformers arranged in the column direction. Referring to FIGS. 2(a) and 2(b) as well, the piezoelectric substrates of the piezoelectric transformers adjacent to each other in the row direction are connected via the lower electrode or an upper electrode wire that collectively connects the piezoelectric transformers arranged in the column direction. Meanwhile, the piezoelectric substrates of the piezoelectric transformers adjacent to each other in the column direction are connected via a right electrode wire or a left electrode wire that collectively connects the piezoelectric transformers arranged in the row direction.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: March 17, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Ohki, Yasuhiro Tsukada
  • Patent number: 7492078
    Abstract: A circular piezoelectric apparatus includes an electrode assembly which has an independent electrode located on a perimeter side wall of the circular piezoelectric apparatus and two separated electrodes located respectively at two opposite surfaces of the circular piezoelectric apparatus, a first structure located between the two separated electrodes that has a polarized direction coincided with a first axial direction directing from one electrode of the two separated electrodes to the other electrode thereof, and a second structure surrounding the first structure about the first axial direction and having a polarized direction coincided with a radial direction of the perimeter. One of the three electrodes is electrically connected a ground electrode to provide a voltage source for supplying an input voltage and a load through at least a conductive wire, and another electrode is electrically connected to an input electrode of the voltage source through another conductive wire.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: February 17, 2009
    Assignee: Zippy Technology Corp.
    Inventors: Chin-Wen Chou, Ying-Nan Cheng
  • Publication number: 20090015096
    Abstract: An ultrasound system for providing megasonics and ultrasonics to a liquid at different frequencies and/or sweeping frequencies with associated generators, transducers, operations between resonance and anti-resonance, non-resistive output with phase shift, multiple/sweep/single frequency modes, individually controlled sections, gate drive power control, variable inductive compensation for temperature changes, parallel inductor matching, stacked ceramics and non-volatile memory storage of fault, error and failure history.
    Type: Application
    Filed: July 11, 2007
    Publication date: January 15, 2009
    Inventor: William L. Puskas
  • Patent number: 7453189
    Abstract: There is provided with a piezoelectric transformer which does not require a marking operation, is easy to manufacture, and is capable of reducing costs. After the piezoelectric transformer is manufactured, a shape of secondary side electrodes on the outer end is made so that a polarization direction can be recognized at the time of printing the secondary side electrodes without marking by a separate step to recognize the polarity on the primary side.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: November 18, 2008
    Assignee: Tamura Corporation
    Inventors: Ryo Nakagawa, Yasuhide Matsuo
  • Patent number: 7439659
    Abstract: The piezoelectric actuator comprises: a plate-shaped piezoelectric body which has a portion polarized in a thickness direction of the piezoelectric body and a portion polarized in a direction oblique to the thickness direction; and a pair of electrodes which are disposed on opposite surfaces of the piezoelectric body facing each other in the thickness direction across the piezoelectric body, have plane-symmetrical portions and plane-asymmetrical portions in relation to the piezoelectric body, are used as polarization electrodes for polarizing the piezoelectric body so that the portion polarized in the thickness direction and the portion polarized in the direction oblique to the thickness direction are formed in the piezoelectric body, and are used as drive electrodes for inducing strain in the piezoelectric body.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: October 21, 2008
    Assignee: Fujifilm Corporation
    Inventor: Ryuji Tsukamoto