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This page is updated frequently with new Piezo-related patent applications. Subscribe to the Piezo RSS feed to automatically get the update: related Piezo RSS feeds. RSS updates for this page: Piezo RSS RSS


Loudspeaker with piezoelectric elements

Harman International Industries

Loudspeaker with piezoelectric elements

Saw filter with improved stop band suppression

Epcos Ag

Saw filter with improved stop band suppression

Saw filter with improved stop band suppression

Avago Technologies General Ip (singapore) Pte. Ltd

Bulk acoustic wave resonator having doped piezoelectric layer


Date/App# patent app List of recent Piezo-related patents
08/27/15
20150245145 
 Sound generator, vibration member for the sound generator, and sound generation system patent thumbnailSound generator, vibration member for the sound generator, and sound generation system
A sound generator includes a vibration unit (60) having a piezoelectric element (61) and also includes a weight (10) for applying a load to the vibration unit (60). The vibration unit (60) deforms based on a sound signal while receiving the load from the weight (10), thereby vibrating a contact surface (150) in contact with the sound generator (10) and generating a sound from the contact surface (150)..
Kyocera Corporation


08/27/15
20150245144 
 Loudspeaker with piezoelectric elements patent thumbnailLoudspeaker with piezoelectric elements
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.
Harman International Industries, Incorporated


08/27/15
20150244348 
 Saw filter with improved stop band suppression patent thumbnailSaw filter with improved stop band suppression
A filter working with surface acoustic waves comprises a piezoelectric substrate (su), a first transducer (idt1) arranged in the acoustic track coupled to an input, having a first mean finger period (pi) assigned to a centre frequency of a pass band of the filter and a second transducer (idt2) arranged in the acoustic track coupled to an output, having the same first mean finger period (p1), and a reflector arranged between first and second transducer having a second mean finger period (p2) assigned to a stop band frequency different from the centre frequency. Further, a new type of very broad bandwidth filters with small insertion loss and high return loss and high rejection are given that use a substrate that can propagate a psaw and comprises fan shaped transducers..
Epcos Ag


08/27/15
20150244347 
 Bulk acoustic wave resonator having  doped piezoelectric layer patent thumbnailBulk acoustic wave resonator having doped piezoelectric layer
In accordance with a representative embodiment, a bulk acoustic wave (baw) resonator comprises: a first electrode having a first electrode thickness; a second electrode having a second electrode thickness; and a piezoelectric layer having a piezoelectric layer thickness and being disposed between the first and second electrodes, the piezoelectric layer comprising a piezoelectric material doped with at least one rare earth element. For a particular acoustic coupling coefficient (kt2) value and a series resonance frequency (fs) of the baw resonator, the first electrode thickness and the second electrode thickness are each greater than a thickness of a first electrode and a thickness of a second electrode of a baw resonator comprising an undoped piezoelectric layer..
Avago Technologies General Ip (singapore) Pte. Ltd


08/27/15
20150244346 
 Bulk acoustic wave resonators having doped piezoelectric material and frame elements patent thumbnailBulk acoustic wave resonators having doped piezoelectric material and frame elements
A bulk acoustic wave (baw) resonator includes a first electrode; a second electrode; and a piezoelectric layer disposed between the first and second electrodes. The piezoelectric layer includes a piezoelectric material doped with at least one rare earth element.
Avago Technologies General Ip (singapore) Pte. Ltd


08/27/15
20150244345 
 Tunable filter structures and design structures patent thumbnailTunable filter structures and design structures
Tunable filter structures, methods of manufacture and design structures are disclosed. The method of forming a filter structure includes forming a piezoelectric resonance filter over a cavity structure.
International Business Machines Corporation


08/27/15
20150244343 
 Laterally-coupled acoustic resonators patent thumbnailLaterally-coupled acoustic resonators
An apparatus, comprises a piezoelectric layer, a first acoustic resonator comprising first and second electrodes formed on opposite sides of the piezoelectric layer, and a second acoustic resonator comprising first and second electrodes formed on opposite sides of the piezoelectric layer and acoustically coupled to the first acoustic resonator.. .
Avago Technologies General Ip ( Singapore) Pte. Ltd.


08/27/15
20150244149 
 Tunable semiconductor device and  making tunable semiconductor device patent thumbnailTunable semiconductor device and making tunable semiconductor device
Method and apparatus for a tunable laser device. In one aspect, a tunable laser device comprises a first doped cladding layer on a semiconductor substrate, a first waveguide layer of essentially undoped piezoelectric material on a top surface of the first doped cladding layer, an active layer on the top surface of the first waveguide layer, a second waveguide layer of essentially undoped piezoelectric material on the top surface of the active layer, a longitudinal structure parallel to a longitudinal axis of the semiconductor device on a top surface of the second waveguide layer comprising a doped semiconductor material, and a longitudinal interdigitated transducer (idt) formed on the top surface of the second waveguide layer or on the bottom surface of the first waveguide layer, the idt extending longitudinally in a direction parallel to the longitudinal axis and being arranged to, in response to a signal from a signal generator, generate a surface acoustic wave (saw) in a direction parallel to the longitudinal axis..
Euphoenix B.v.


08/27/15
20150243880 
 Piezoelectric actuator of a multilayer design and  fastening an outer electrode in a piezoelectric actuator patent thumbnailPiezoelectric actuator of a multilayer design and fastening an outer electrode in a piezoelectric actuator
A piezoelectric actuator of a multilayer design includes outer electrodes that are fastened by means of a bonding layer applied by thermal spraying. For example, the outer electrodes are formed as a woven wire fabric.
Epcos Ag


08/27/15
20150243878 
 Nbt-bt crystal piezoelectric film and piezoelectric stacking structure comprising the same patent thumbnailNbt-bt crystal piezoelectric film and piezoelectric stacking structure comprising the same
The present invention provides an nbt-bt film having a higher polarization-disappearance temperature. The present invention is a [(na,bi)1-xbax]tio3 crystal piezoelectric film.
Panasonic Corporation


08/27/15
20150243877 

Piezoelectric element unit and driving device


A piezoelectric element unit comprises an element body having internal electrodes laminated with piezoelectric layers therebetween and a pair of external electrodes electrically connected to the internal electrodes and an electric connection part for connecting a wiring part to the external electrodes. The electric connection part is composed of a conductive resin adhesive part and the conductive resin adhesive part is covered by a resin part..
Tdk Corporation


08/27/15
20150243876 

Piezoelectric element unit and driving device


A piezoelectric element unit comprises an element body having an active part and an inactive part; and a first resin part bonding one end surface in the laminating direction of the element body to a mounting surface of a joint member placed to face the one end surface. The first resin part covers the mounting surface up to an outer side surface of the element body corresponding to an interface between the active part and the inactive part, a second resin part covers an outer surface of the first resin part covering the outer side surface of the element body at a position corresponding to the interface between the active part and the inactive part, and the second resin part also integrally covers the outer side surface of the element body corresponding to the active part..
Tdk Corporation


08/27/15
20150243874 

Transducers with improved impedance matching


A transducer (140) having a mechanical impedance over an operative frequency range and having a desired power coupling (145) to a load over the operative frequency range comprises a piezoelectric device (141) having a frequency distribution of modes in the operative frequency range; and an overmould (143). The overmould (143) is arranged to surround at least part of the piezoelectric device (141); and the parameters of the overmould (143) are selected to provide a required impedance matching between the mechanical impedance of the transducer (140) and the mechanical impedance of the load.
Nvf Tech Ltd.


08/27/15
20150243873 

Acoustic wave device with suppressed higher order transverse modes


In an acoustic wave device, an unnecessary high-order transverse mode wave is suppressed. The acoustic wave device includes a piezoelectric substrate, at least one pair of interdigital transducer (idt) electrodes formed on the piezoelectric substrate, and a dielectric film which covers at least a part of the piezoelectric substrate and the idt electrodes.
Skyworks Panasonic Filter Solutions Japan Co., Ltd


08/27/15
20150243440 

Non-uniform dielectric layer capacitor for vibration and acoustics improvement


A non-uniform dielectric layer, multi-layer-ceramic-capacitor (mlcc) has upper and lower dielectric layers separating upper and lower electrode layers, where the lower dielectric layers have a greater vertical thickness than the upper dielectric layers to reduce piezoelectric effect driven capacitor reaction forces on a printed circuit board (pcb) on which the capacitor is mounted. Such an mlcc may include an upper set of dielectric layers that separate adjacent pairs of upper electrode layers in a top portion of the mlcc, and a lower set of dielectric layers that separate adjacent pairs of lower electrode layers in a bottom portion of the mlcc.
Apple Inc.


08/27/15
20150242037 

Transparent force sensor with strain relief


A transparent force sensor for detecting an applied force on a surface of a device. The transparent force sensor includes a transparent force-sensitive film having an array of strain-relief features oriented along a first direction.
Apple Inc.


08/27/15
20150241465 

Piezoresistive mems sensor


A pressure sensor includes a soi substrate that includes a si substrate, a sio2 layer, and a surface si film. An opening portion is formed in the si substrate through etching, and a displacement portion having a membrane structure is defined by the surface si film and the sio2 layer in this area.
Murata Manufacturing Co., Ltd.


08/27/15
20150241393 

Ultrasonic authenticating button


Embodiments of an ultrasonic button and methods for using the ultrasonic button are disclosed. In one embodiment, an ultrasonic button may include an ultrasonic transmitter configured to transmit an ultrasonic wave, a piezoelectric receiver layer configured to receive a reflected wave of the ultrasonic wave, a platen layer configured to protect the ultrasonic transmitter and the piezoelectric receiver layer, a first matching layer configured to match an acoustic impedance of the platen layer with an acoustic impedance of ridges of a finger, and an ultrasonic sensor array configured to detect the finger using the reflected wave..
Qualcomm Incorporated


08/27/15
20150241291 

Pressure sensor made from nanogauges coupled to a resonator


A pressure sensor made of semiconductor material, the sensor comprising a box defining a housing under a secondary vacuum, at least one resonator received in the housing and suspended by flexible beams from at least one elastically deformable diaphragm closing the housing that also contains means for exciting the resonator in order to set the resonator into vibration and detector means for detecting a vibration frequency of the resonator. The detector means comprise at least a first suspended piezoresistive strain gauge having one end secured to one of the beams and one end secured to the diaphragm.
Sagem Defense Securite


08/27/15
20150241189 

Solid state ignition safety device


A solid state ignition safety device for rocket assisted projectiles having a piezoelectric generator that charges a capacitor during the initial acceleration of the projectile by the launching propellant charge. The capacitor is then discharged after a delay to ignite an initiator, which ignites the rocket motor of the projectile.
Bae Systems Land & Armaments, L.p.


08/27/15
20150239248 

Liquid ejecting head and liquid ejecting apparatus


Piezoelectric elements each have a configuration in which a lower electrode film, a piezoelectric body layer, and an upper electrode film are stacked in order from a side relatively near to a displacement portion that defines a pressure chamber by tightly closing a portion of a pressure chamber space that forms the pressure chamber. The lower electrode film is provided individually for each pressure chamber.
Seiko Epson Corporation


08/27/15
20150239247 

Liquid discharge apparatus and piezoelectric actuator


A liquid discharge apparatus includes: a flow passage structure; and a piezoelectric actuator which is joined to the flow passage structure, the piezoelectric actuator including: a first piezoelectric layer; a second piezoelectric layer; a plurality of first electrodes which are arranged on an upper surface of the first piezoelectric layer; a second electrode which is arranged between the first piezoelectric layer and the second piezoelectric layer; a first conductive pattern which is arranged in an area disposed on an outer side of the plurality of first electrodes on the upper surface of the first piezoelectric layer; a conducting portion which is arranged in a through-hole penetrating through the first piezoelectric layer, the through-hole being formed in the first conductive pattern; and a second conductive pattern which is arranged between the through-hole and the plurality of first electrodes on the upper surface of the first piezoelectric layer.. .
Brother Kogyo Kabushiki Kaisha


08/27/15
20150239246 

Multiple thin film piezoelectric elements driving single jet ejection system


A printhead including a plurality of actuators, wherein each actuator of the plurality of actuators includes a plurality of drive electrodes, a plurality of diaphragms, and a single nozzle. Each drive electrode is uniquely paired with one of the diaphragms.
Xerox Corporation


08/27/15
20150239239 

Liquid discharge apparatus and residual vibration detection method


A liquid discharge apparatus includes: a head having a piezoelectric element that vibrates a diaphragm, a pressure chamber where an interior pressure is increased or decreased by vibration of the diaphragm, and a nozzle communicating with the pressure chamber to discharge a liquid inside the pressure chamber according to increasing and decreasing of the interior pressure; a drive unit that outputs a drive signal which becomes a first potential during a first period, becomes a second potential during a second period following the first period, and becomes a third potential, which is a potential between the first potential and the second potential, during a third period following the second period; a detection unit that detects a residual vibration inside the pressure chamber; and a control unit capable of modifying the potential of the third potential within a range between the first potential and the second potential.. .
Seiko Epson Corporation


08/27/15
20150239126 

Force detector and robot


A force detector includes a first base part, a second base part, and a pressure detection unit provided between the first base part and the second base part and including a piezoelectric element that outputs a signal in response to an external force, wherein the pressure detection unit has a first member having a portion in contact with the first base part, a second member having a portion in contact with the second base part, and a third member connecting the first member and the second member, a first longitudinal elastic modulus of at least a part of the first member is lower than a third longitudinal elastic modulus of the third member, and a second longitudinal elastic modulus of at least a part of the second member is lower than the third longitudinal elastic modulus of the third member.. .
Seiko Epson Corporation


08/27/15
20150239011 

Device


The present invention provides a device with a piezoelectric element disposed at a location other than near an edge of a panel. A device includes a panel and a piezoelectric element disposed in a predetermined region on a planar surface of the panel.
Kyocera Corporation


08/27/15
20150238993 

Dual air-chamber fully-sealed piezoelectric nebulization module


Disclosed is a dual air-chamber fully sealed piezoelectric nebulization module including a first casing, a second casing and a piezoelectric nebulization module, and the piezoelectric nebulization module is clamped between the casings by snapping and sealing to partition the internal space in the first casing and the second casing into two independent air chambers. In this design, a peripheral portion of the piezoelectric nebulization module is packaged to reduce the energy and vibration from being absorbed or inhibited during vibration and provides a space with good support and free vibration to enhance the nebulization efficiency.
Micro Base Technology Corporation


08/27/15
20150238753 

Artificial sensory epithelium


An artificial sensory epithelium (1) to be embedded in a cochlea (301) of a patient includes a piezoelectric film (2) and multitude microelectrodes (3), (3), . .
Osaka University


08/20/15
20150236665 

Method for manufacturing surface acoustic wave apparatus


Provided is a method for manufacturing a surface acoustic wave apparatus that can reduce degradation of electric characteristics and also reduce the number of manufacturing processes. The method for manufacturing a surface acoustic wave apparatus includes the steps of: forming an idt electrode on an upper surface of a piezoelectric substrate, forming a frame member surrounding a formation area in which the idt electrode is formed on the piezoelectric substrate, and mounting a film-shaped lid member on the upper surface of the frame member so as to be joined to the frame member so that a protective cover, used for covering the formation area and for providing a tightly-closed space between it and the formation area, is formed..
Kyocera Corporation


08/20/15
20150236620 

Method for manufacturing energy harvester comprising piezoelectric polymer microstructure array


A method for manufacturing an energy harvester including a piezoelectric polymer microstructure array. The method includes: preparing a micro-column array of a piezoelectric polymer on a substrate; supplying a plate electrode as an upper electrode, allowing the substrate and the upper electrode to form a pair of plate electrodes; applying a dc voltage between the pair of the plate electrodes; heating the substrate to a temperature higher than a glass transition temperature of the piezoelectric polymer and performing rheological formation of the micro-column array with the dc voltage still being applied until the column array of the piezoelectric polymer reaches the upper electrode to form a mushroom-shaped structure array; and cooling and solidifying the piezoelectric polymer to obtain the piezoelectric energy harvester..
Xi'an Jiaotong University


08/20/15
20150236244 

Ferroelectric ceramics and manufacturing method thereof


To obtain a piezoelectric film having excellent piezoelectric properties. One aspect of the present invention relates to ferroelectric ceramics including a zro2 film oriented in (200), a pt film that is formed on the zro2 film and is oriented in (200) and a piezoelectric film formed on the pt film..
Youtec Co., Ltd.


08/20/15
20150236243 

Piezoelectric element, liquid ejecting head, and sensor


A piezoelectric element 300 includes a first electrode 60, a piezoelectric layer 70 arranged on the first electrode 60, and a second electrode 80 arranged on the piezoelectric layer 70, in which the piezoelectric layer 70 includes a composite oxide which has a perovskite structure and the composite oxide has a composition represented as a mixed crystal of bismuth ferrate and strontium titanate.. .
Seiko Epson Corporation


08/20/15
20150236242 

Single-crystal piezoelectric fiber composite and magnetoelectric laminate composite including the same


A piezoelectric fiber composite and a magnetoelectric laminate composite including the same are disclosed. The piezoelectric fiber composite includes a first protective layer having a first electrode, a second protective layer having a second electrode, and a piezoelectric fiber layer formed between the first and the second electrode and having piezoelectric fibers arranged in the longitudinal direction of the composite, wherein the piezoelectric fibers include a single-crystal piezoelectric material and are configured such that a <011> direction of the single crystal is identical to a thickness direction of the composite and a <001> direction of the single crystal is identical to a longitudinal direction of the composite, thus exhibiting superior piezoelectric strain properties and sensing properties.
Korea Institute Of Machinery And Minerals


08/20/15
20150236241 

Vibration generating apparatus


There is provided a vibration generating apparatus including: an elastic member having both end portions thereof fixedly installed on a support part of a lower case; a piezoelectric element installed on one surface of the elastic member; and a mass body part connected to the elastic member to increase an amount of vibrations, wherein the mass body part is provided with protrusion portions for first contacting the lower case at the time of an external impact.. .
Samsung Electro-mechanics Co., Ltd.


08/20/15
20150236240 

Piezoelectric vibration actuator and manufacturing the same


Embodiments of the invention provide a piezoelectric vibration actuator and a method of manufacturing the same. According to at least one embodiment, the piezoelectric vibration actuator includes a case having an internal space partitioned into a top wall, a right side wall, a bottom wall, and a left side wall and having opened one side wall, and a driving part coupled to the case and linearly translated toward the top wall and the bottom wall in the internal space of the case..
Samsung Electro-mechanics Co., Ltd.


08/20/15
20150236239 

Actuator device


Actuator device has a main body with base and superstructure bodies, the device having a plurality of actuators formed from a piezoelectric or electrostrictive material and each extend from the base body and form the superstructure body. The actuators each have at least two inner actuating electrodes of which at least one first inner actuating electrode extends, in a positive depthwise direction from the front side up to a distance from the rear side, and of which at least one second inner actuating electrode extends in a negative depthwise direction from the rear side up to a distance from the front side.
Pi Ceramic Gmbh


08/20/15
20150236238 

Elastic wave element and ladder filter using same


Methods and apparatus for reducing electric loss in an elastic wave element. In one example, the elastic wave element includes a piezoelectric body having a upper surface, an interdigital transducer (idt) electrode disposed on the piezoelectric body, a connection wiring disposed on the piezoelectric body and electrically connected to the idt electrode, the connection wiring having a lower connection wiring and an upper connection wiring provided above the lower connection wiring, and a reinforcement electrode provided above the connection wiring, the reinforcement electrode being in contact with and electrically connected to the lower connection wiring..

08/20/15
20150236237 

Elastic wave device manufacturing method and elastic wave device


Functional element units and a connection line electrically connecting the functional element units are formed on one principal surface of a piezoelectric motherboard. A resin support layer enclosing the functional element units is formed on the one principal surface of the motherboard.
Murata Manufacturing Co., Ltd.


08/20/15
20150235656 

Apparatus for detecting voice and controlling method thereof


Embodiments of the invention provide a method and apparatus for detecting a voice. The apparatus, according to various embodiments of the invention, includes a driving signal processing unit configured to generate a driving signal using a first output voltage induced from an initial voice signal sensed by a piezoelectric and a first preset reference voltage.
Samsung Electro-mechanics Co., Ltd.


08/20/15
20150234484 

Use of hyper gliding for reducing friction between an input device and a reference surface


An input device is communicatively coupled to a host, wherein a movement of the input device is measured relative to a reference surface, and wherein the friction between the input device and the said reference surface is dynamically reducible. The input device comprises a housing and an actuator for contacting the reference surface.
Logitech Europe S.a.


08/20/15
20150234465 

Electronic device and providing information thereof


An electronic device includes a pressure providing part, a fluid, and a tactile sensation providing layer. The pressure providing part generates an initial pressure by an electrical signal.
Samsung Display Co., Ltd.


08/20/15
20150234446 

Dynamic switching of power modes for touch screens using force touch


Switching of power modes for touch screens is disclosed. In example embodiments a touch detect mode may be activated for touchscreen operation.

08/20/15
20150234177 

Mems optical scanner


Provided is a mems optical scanner that stably performs a scan with light by rotary moving a mirror centering on a v-axis in coincidence with a resonant frequency that enables ramp wave driving while securing shock resistance. The mems optical scanner includes a first substrate, a driving portion that drives the mirror by a piezoelectric film in a first axial direction where the piezoelectric film is installed on the first substrate, a frame that supports a driving portion, a second substrate, a support portion that supports the first substrate, a frame portion spaced from and surrounding the support portion, and an axis portion that supports the support portion and the frame portion along a second axial direction.
Jvc Kenwood Corporation


08/20/15
20150233777 

Strain transmitter


A strain transmitter for detecting strain of a structure includes a strain body, which has a strain axis with fastening devices for fastening the strain body on a structure, and a measurement element, which is arranged centrally between the fastening devices on the strain axis. The measurement element includes a metal sheet.
Kistler Holding Ag


08/20/15
20150232186 

De-icing system and method


A de-icing system for a hemispherical protective housing mounted on an aircraft structure is described. The system can include a series of piezo-electric devices mounted at the boundary of the housing.
Selex Es Ltd


08/20/15
20150231907 

Liquid discharge device, and discharge abnormality testing method


A liquid discharge device includes a head having a piezoelectric element that vibrates a vibrating plate, a pressure chamber for which the internal pressure is increased and decreased by vibration of the vibrating plate, and a nozzle in communication with the pressure chamber, that can discharge a liquid by increasing and decreasing the pressure of the pressure chamber, a drive unit that outputs drive signals to the piezoelectric element, a testing unit that tests discharge abnormality of the nozzle based on a vibration pattern of residual vibration inside the pressure chamber that occurs due to the drive signals, and a control unit that has the drive unit output a second drive signal after having it output a first drive signal, and that has the testing unit detect the discharge abnormality of the nozzle after the second drive signal is output.. .
Seiko Epson Corporation


08/20/15
20150231884 

Piezoelectric actuator, liquid ejecting head, and manufacturing piezoelectric actuator


Provided is piezoelectric actuator includes; a vibrating plate; a first electrode provided on the vibrating plate; a first seed layer provided on the first electrode; a second seed layer provided on the vibrating plate at least at a position adjacent to the first electrode; a first piezoelectric layer provided on the first seed layer, the first piezoelectric layer and has a perovskite structure; a second piezoelectric layer that is provided to cover the first piezoelectric layer and the second seed layer; and a second electrode that is provided on the second piezoelectric layer. The first piezoelectric layer and the second piezoelectric layer are preferentially oriented to a (100) face..
Seiko Epson Corporation


08/20/15
20150231881 

Liquid ejecting head and liquid ejecting apparatus


A liquid ejecting head includes: a nozzle plate provided with nozzle openings; an actuator unit including a flow channel formation substrate in which pressure generation chambers are provided and piezoelectric actuators that cause a change in the pressure of the liquid within respective pressure generation chambers; a communication substrate in which communication channels that communicate between the pressure generation chambers and corresponding nozzle openings are provided; a first case member that is a frame member affixed to the communication substrate so that the actuator unit is disposed within the first case member and that, along with the actuator unit, forms a manifold that holds the liquid to be supplied to the pressure generation chambers; and a second case member that is affixed to the first case member and in which is formed an introduction channel that sends the liquid from the exterior to the manifold.. .
Seiko Epson Corporation


08/20/15
20150231530 

Centrifugal microfluidic device


Disclosed is a centrifugal microfluidic device comprising a piezoelectric substrate; a rotatable platform device on the substrate; and at least one transducer on the substrate, the transducer being configured to generate a surface acoustic wave that propagates on the surface of the substrate and contacts the rotatable platform device asymmetrically to transfer energy thereto with a lateral distribution to cause rotation of the rotatable platform device. The device may be a microfluidic valve, a microfluidic mixer or a microfluidic particle concentrator..
Royal Melbourne Institute Of Technology


08/20/15
20150231394 

Cochlear implant


A device for implantation into a scalia tympani of a cochlea is disclosed. The device comprises blocks and compliant elements interconnecting the blocks with one of the compliant elements disposed between each pair of adjacent blocks.
The Regents Of The University Of Michigan


08/13/15
20150229290 

Piezoelectric thin film element, manufacturing the same, and electronic device including piezoelectric thin film element


An alkali-niobate-based piezoelectric thin film element includes a substrate, a lower electrode film on the substrate, a piezoelectric thin film on the lower electrode film, and an upper electrode film on the piezoelectric thin film. The piezoelectric thin film is made of an alkali-niobate-based piezoelectric material represented by the formula (naxkyliz)nbo3, where 0≦x≦1, 0≦y≦1, 0≦z≦0.2, and x+y+z=1.
Hitachi Metals, Ltd.


08/13/15
20150229242 

Device and harvesting energy


A miniature energy harvesting device for producing electricity from acoustical energy, stray electromagnetic energy, noise and from energy of different anatomical motions. The device comprises a housing, a mechanical spring engaged with the housing between a static and dynamic state and a first magnet engaged with the mechanical spring.

08/13/15
20150229240 

Ultrasonic motor


An ultrasonic motor having an ultrasound actuator in the form of a piezoelectric hollow cylinder with friction elements on at least one of its end surfaces, and having a rotor in effective contact with the friction elements and an electric excitation device. The actuator is subdivided in the circumferential direction in an even number of sectors sa and sb with the sectors sa and sb alternating and being adjacent in circumferential direction, and the friction elements being arranged in the range of adjacency of neighboring sectors.
Physik Instrumente (pi) Gmbh & Co. Kg


08/13/15
20150229238 

Piezoelectric device, piezoelectric actuator, hard disk drive, and inkjet printer apparatus


A piezoelectric device is provided with a piezoelectric element including a piezoelectric layer exhibiting a polarizability γ smaller than 1×10−9 (c/(v·m)) in the case where an electric field is applied until polarization is saturated and a circuit having a means to set a minimum value of a drive electric field to become larger than a positive coercive electric field of the above-described piezoelectric layer and a means to set a maximum value of the above-described drive electric field to become smaller than (pm′ (maximum value of polarization)−pr′ (quasi-remanent polarization))/(1×10−9) and, therefore, an object is to drive the piezoelectric element in an electric field range in which maximum piezoelectric characteristics are obtained, improve the characteristics of the piezoelectric device, and enhance the reliability.. .
Tdk Corporation




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Piezo topics: Piezoelectric, Transducer, Ultrasonic, Electric Actuator, Electronic Device, Electronic Apparatus, Damping Force, Radial Flow, Semiconductor Material, Semiconductor, Sound Transducer, Ultrasound, Synchronous, Asynchronous, Liquid Adhesive

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