This page is updated frequently with new Piezo-related patent applications.
| Electroacoustic converter|
An electroacoustic converter includes a piezoelectric film whose principal surface expands and contracts according to an electric field, a viscoelastic support which is in close contact with the principal surface of the piezoelectric film, a pressing member which presses the piezoelectric film to the viscoelastic support, and an expandable pressing sheet which is tensioned and in close contact with the surface of the piezoelectric film opposite to the viscoelastic support to press the piezoelectric film and the viscoelastic support. In a section in a predetermined direction perpendicular to the principal surface of the piezoelectric film, the piezoelectric film has a flat portion which is held by the pressing sheet and the viscoelastic support in a portion thereof excluding a pressed portion by the pressing member, and an inclined portion which is connected to the pressed portion and the flat portion and extends in a direction of intersecting the pressed portion.
| Physical object drop and impact alarm device|
The present invention comprises a device which emits an audible sound when it is dropped and impacts upon the ground or other surface. The device is small enough to be easily placed in a user's wallet, on a keychain, or other valuable and will alert the user when these valuables are dropped.
| Acoustic wave filter, duplexer, and module|
An acoustic wave filter includes: series resonators connected in series; and one or more parallel resonators connected in parallel, wherein at least two series resonators and a parallel resonator therebetween are divided into a first divided resonator, which includes a piezoelectric substance sandwiched between a pair of electrodes in a c-axis orientation direction, and a second divided resonator, which includes another piezoelectric substance sandwiched between another pair of electrodes so that the another pair of electrodes in the c-axis orientation direction has an electric potential opposite to that of the electrodes of the first divided resonator in the c-axis orientation direction, a first group including the first divided resonators and a second group including the second divided resonators are interconnected in parallel between two nodes, and the first divided resonators and the second divided resonators of the at least two series resonators are not electrically interconnected at the two nodes.. .
Taiyo Yuden Co., Ltd.
| Hybrid photovoltaic and piezoelectric fiber|
The invention provides hybrid photovoltaic-piezoelectric energy harvesting devices in the form of flexible filaments. The devices harvest energy from ambient light, and also from environmental motions and vibrations.
| Wireless signal transmitting apparatus and wireless illumination control apparatus using the same|
A wireless signal transmitting apparatus, includes: a piezoelectric harvester configured to generate electrical energy responsive to user switch manipulation; and, a wireless communication circuit configured to generate wireless signals from the electrical energy and wirelessly transmit the wireless signals to an external wireless power receiving device.. .
Samsung Electro-mechanics Co., Ltd.
| Combined renewable energy and compressed gas energy storage and generator microgrid system using reciprocating piezoelectric generators|
A combined heat and power system, namely a portable combined heat and power microgrid system with the capacity to convert air to electricity, since the system imparts excess energy derived from multiple electrical energy sources, namely renewables or other sources of electrical supply like gas-induced electrical generation, to produce and store energy as compressed heat that is then redirected to generate reciprocating energy utilizing a barrel housing or setting to promote direct kinetic energy transfer method onto an array of rowed piezoelectric generators that use sequential direct kinetic energy transference to produce electricity and store it in a second electrical storage unit that can be interconnected to the operational electrical storage unit to not only promote redirect electrical flow during peak or off-peak to extend systemic operations but also to promote high volumes of energy from multiple energy sources for electric user purposes, enabling communication with high density energy when stored.. .
| Piezoelectric material piezoelectric element and electronic apparatus|
The present invention provides a piezoelectric material not containing lead and potassium, showing satisfactory insulation and piezoelectricity, and having a high curie temperature. The invention relates to a piezoelectric material includes a main component containing a perovskite-type metal oxide represented by formula (1): (naxba1-y)(nbyti1-y)o3 (wherein, 0.80≦x≦0.94 and 0.83≦y≦0.94), and an additive component containing at least one element selected from mn and ni, wherein the content of the ni is 0 mol or more and 0.05 mol or less based on 1 mol of the perovskite-type metal oxide, and the content of the mn is 0 mol or more and 0.005 mol or less based on 1 mol of the perovskite-type metal oxide..
Canon Kabushiki Kaisha
| Piezoelectric polymer composite|
In a piezoelectric polymer composite in which piezoelectric particles are dispersed in a polymer matrix, the piezoelectric particles include 5 vol % to 30 vol % of particles having a particle size which is 0.25 times to 1 time a thickness of the piezoelectric polymer composite. As a result, the piezoelectric polymer composite exhibits satisfactory piezoelectric characteristics..
| Drive device for vibrating member, vibration type actuator using the same, and imaging apparatus|
When stopping a vibration type actuator at a final target stopping position, driving frequency and phase difference of ac signals input to a piezoelectric element are set in accordance with a first deviation obtained from a command position sequentially determined and a relative position of a vibrating member and driven element, and also pulse duty is adjusted in accordance with a second deviation obtained from a final target stopping position and the relative position.. .
Canon Kabushiki Kaisha
| Scanning ion conductance microscopy|
A method for interrogating a surface of a sample bathed in electrolyte solution using sicm, comprising: controlling the potential between first and second electrodes bathed in the electrolyte solution to induce an ion current in the electrolyte solution, a submerged portion of the first electrode being contained within a micropipette and the second electrode being external to the micropipette; recording the ion current whilst controlling the micropipette to move with respect to a stage supporting the sample; and determining, from the ion current and calibration data, the surface height profile of the sample. Said potential can be controlled according to a spread spectrum modulated signal.
Sealing member with visible pressure and temperature indication
A sealing member for a machine may include an elastomeric body configured to fit at least partially into a recess defined in at least one of two sealing surfaces of two mating parts of the machine. The elastomeric body may include a visible indicator portion extending out from between the two mating parts.
Downhole acoustic transducer, downhole probe and tool comprising such a transducer
A thickness (ei) of the membrane wall (13) is such that there is a common resonance between the membrane wall and the piezoelectric element thereby achieving high acoustic transmission through the membrane wall (13), and such that the membrane wall (13) is suitable to resist to the hydrocarbon well pressure.. .
An ultrasound probe including a matching element, a backing layer, a piezoelectric element and a driver is provided. The piezoelectric element is disposed between the matching element and the backing layer.
A mobile terminal according to the present disclosure includes a housing member with a first sound hole, a film speaker and a speaker holder with a second sound hole. The film speaker includes a piezoelectric element and a resin film configured to vibrate with the piezoelectric element.
Piezoelectric drive device and robot
A piezoelectric drive device includes a plurality of piezoelectric vibrating portions that drive a driven member. A difference between the maximum resonance frequency and the minimum resonance frequency in each resonance frequency of the plurality of piezoelectric vibrating portions falls within a range of 0.001% to 5% of an average resonance frequency of the plurality of piezoelectric vibrating portions..
Seiko Epson Corporation
Drum-type wide-frequency piezoelectric power generation apparatus
A drum-type wide-frequency piezoelectric power generation apparatus may include a protective layer pasted on piezoelectric layer through epoxy resin glue or other conductive adhesives. The piezoelectric layer is pasted on the base layer through epoxy resin or other conductive adhesives.
Beijing University Of Technology
We describe a nanopositioning device comprising: a mount and a moving stage held within said mount, preferably by sets of flexures on opposite sides of the stage such that the stage is displaceable in a longitudinal direction within said mount. A piezoelectric actuator is mechanically coupled to said stage to controllably displace the stage in a longitudinal direction.
Elektron Technology Uk Limited
Dc-ac power converting circuit
A direct current (dc)-alternating current (ac) power convertor is disclosed. The dc-ac power converting circuit may include an inverter configured to convert the dc power into first output power, a piezoelectric transforming unit including piezoelectric transformers connected in parallel to an output terminal of the inverter, and each piezoelectric transformer of the piezoelectric transformers configured to transform the first output power to second output power, and an output configured to add the second output power output from the each of the piezoelectric transformer and to output ac power, wherein each piezoelectric transformer has a resonance frequency..
Samsung Electro-mechanics Co., Ltd.
Hybrid energy system for general applications
The hybrid energy system for onshore and for offshore applications to include buildings infrastructure, and vessels respectively an assortment one or more arrays of integrated piezoelectric devices, wind turbine array and solar panels characterized in that they are to produce renewable energy for on demand use and for battery bank storage. Accordingly the onshore application includes a kinetic energy turbine farm, and also offshore methods for kinetic energy turbine farms, mega buoys and mega vessels to supply extra electric energy to other vessels and to shunt net power to utility grid companies, and mega-barges produce net power in onboard giant battery bank containers to rent by shipping to utility consignment locations coastally..
Scanner unit, optical fiber scanner, illumination apparatus, and observation apparatus
A scanner unit includes: a tubular elastic part provided with marks outside a prescribed bonding region set on an outer surface thereof and; and a piezoelectric element that is bonded to the bonding region. The piezoelectric element includes: a piezoelectric body having two mutually opposing electrode faces; and marks that are different from each other, respectively provided on the two electrode faces.
Optical fiber scanner, illuminator, and observation apparatus
An optical fiber scanner includes: an elongated optical fiber; driving piezoelectric elements that are provided on an outer circumferential surface of the optical fiber and produce bending oscillation at a distal-end portion of the optical fiber as a result of an alternating voltage being applied thereto; detecting piezoelectric elements provided on the outer circumferential surface at the distal-end portion of the optical fiber; and a control unit that controls an alternating voltage to be applied to the driving piezoelectric elements on the basis of the voltages produced by the detecting piezoelectric elements.. .
Heterogeneous surfaces for patterned bubble arrays, enhanced heat transfer, & advanced heat exhanger applications
Heterogeneous surfaces to tailor bubble nucleation, bubble sites, and bubble dynamics. In some embodiments, piezoelectric inkjet printing is employed to deposit hydrophobic polymer dot arrays having any predetermined pattern.
Liquid ejecting head, liquid ejecting apparatus, and piezoelectric device
A liquid ejecting head includes a flow channel forming substrate that is provided with a space constituting a pressure generating chamber which communicates with nozzle openings, a vibration plate that is stacked on one surface of the flow channel forming substrate and seals the space, and a piezoelectric element that includes a first electrode, a piezoelectric layer, and a second electrode sequentially stacked on a surface of the vibration plate opposite to the flow channel forming substrate, in which the first electrode is formed, in which at least a width of a first direction along the opposite surface is narrower than the space in a region corresponding to the space, the piezoelectric layer is stacked so as to overlap the first electrode and at least a part of the vibration plate in the region corresponding to the space, the second electrode is stacked so as to overlap the piezoelectric layer in the region corresponding to the space, and as a thickness of a stacked direction of the piezoelectric element is a thickness of the piezoelectric layer, a first thickness (d1) of the piezoelectric layer of a part positioned on the first electrode and a second thickness (d2) of the piezoelectric layer of a part positioned on the vibration plate satisfy a relationship of the first thickness (d1)>the second thickness (d2).. .
Seiko Epson Corporation
An inkjet head includes a substrate that defines a cavity in which ink is stored, a vibrating membrane that is supported by the substrate and that defines the cavity, and a piezoelectric device that is disposed on the vibrating membrane and that changes a volume of the cavity by displacing the vibrating membrane. The piezoelectric device includes a lower electrode, a piezoelectric membrane that is disposed on the lower electrode, and an upper electrode that is disposed on the piezoelectric membrane and that faces the lower electrode with the piezoelectric membrane interposed between the upper electrode and the lower electrode.
Rohm Co., Ltd.
Ink jet head and manufacturing method thereof
An ink jet head includes a base member having a plurality of openings, a diaphragm formed on a surface of the base member covering each of the openings, a pressure chamber being formed at each of the openings, and a plurality of piezoelectric elements formed at locations on the diaphragm corresponding to the pressure chambers, each of the piezoelectric elements being configured to eject liquid from a corresponding pressure chamber by causing deformation of the diaphragm. The diaphragm includes a plurality of stress release portions that reduces compressive residual stress in the diaphragm, each of the stress release portions corresponding to one of the piezoelectric elements..
Toshiba Tec Kabushiki Kaisha
Piezoelectric drive device, robot, and driving piezoelectric drive device
A piezoelectric drive device includes: a piezoelectric vibrating portion including a vibrating body, a piezoelectric element disposed on at least one surface of the vibrating body, and a support portion supporting the vibrating body; an elastic member pressing the vibrating body against a driven member; and a heat conducting member disposed so as to be capable of changing a mutual positional relationship with the elastic member while maintaining a surface-to-surface contact state therewith.. .
Seiko Epson Corporation
An ultrasonic sensor including a case having a bottom portion, and a piezoelectric element that is bonded to an inner surface of the bottom portion and performs bending vibration together with the bottom portion. The piezoelectric element includes a piezoelectric layer having a transmission region and a reception region, a common electrode, a transmission electrode opposing the common electrode with the transmission region interposed therebetween, and a reception electrode opposing the common electrode with the reception region interposed therebetween.
Murata Manufacturing Co., Ltd.
Device for generating mechanical vibrations
There is disclosed a mechanical-vibration-generating-device for generating a mechanical vibration, the mechanical vibration having a vibration direction. The mechanical-vibration-generating-device comprises: rigid bushings comprising at least a beginning rigid bushing and a end rigid bushing, at least one axial piezoelectric stack positioned between the beginning rigid bushing and the end rigid bushing, the at least one axial piezoelectric stack having an imaginary axis; the imaginary axis being aligned with the vibration direction, a coupling for interconnecting the beginning rigid bushing and the end rigid bushing, a common internal channel defined in the rigid bushings and the piezoelectric stack, the first connective passage and the second connective passage defined in the rigid bushings providing a fluid path between the common internal channel and an ambient environment, the first connective passage having a first valve and the second connective passage having a second valve, the first valve being configured as an inlet valve and the second valve being configured as an outlet valve..
Obshchestvo S Ogranichennoy Otvetstvennostyu "renk"
Non-planar and non-symmetrical piezoelectric crystals and reflectors
An acoustophoretic device is disclosed. The acoustophoretic device includes an acoustic chamber, an ultrasonic transducer, and a reflector.
Flodesign Sonics, Inc.
Dispensing device and method
A system for accurately dispensing small droplets from a positive displacement pumps is actuated by a linear actuator. Preferably the linear actuator is a piezo-actuator.