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Piezoelectric patents

      

This page is updated frequently with new Piezoelectric-related patent applications.




 Device generating sound patent thumbnailnew patent Device generating sound
In the present invention, a device is provided with a main surface member, a piezoelectric body plate, a first support part, and a housing. The main surface member is used as a vibration plate.
Sharp Kabushiki Kaisha


 Acoustic wave device and acuoustic wave module patent thumbnailnew patent Acoustic wave device and acuoustic wave module
An acoustic wave device of the present invention has a piezoelectric substrate, an excitation electrode arranged on the piezoelectric substrate, an electrode pad arranged on the piezoelectric substrate and electrically connected to the excitation electrode, and a cover arranged on the piezoelectric substrate so that a oscillation space is arranged between the cover and the excitation electrode. The cover has inside it a via conductor electrically connected to the electrode pad and is curved so that its surface facing the piezoelectric substrate approaches the excitation electrode side with respect to an upper surface of the piezoelectric substrate from a position of contact with the via conductor..
Kyocera Corporation


 Acoustic wave device patent thumbnailnew patent Acoustic wave device
An acoustic wave device includes: a support substrate; a piezoelectric substrate bonded to the support substrate; a first acoustic wave element formed on the piezoelectric substrate; a frame formed on the support substrate to surround the first acoustic wave element; and a substrate formed on the frame so that a cavity to which the first acoustic wave element is exposed is formed above the piezoelectric substrate, wherein a difference in linear expansion coefficient between the support substrate and the substrate in a first direction in a surface direction of the piezoelectric substrate is less than a difference in linear expansion coefficient between the support substrate and the piezoelectric substrate in the first direction, and the piezoelectric substrate remains in a region where the first acoustic wave element is formed and is removed in a region where the frame is formed.. .
Taiyo Yuden Co., Ltd.


 Method and  identifying discharge failure of a piezoelectric circuitry patent thumbnailnew patent Method and identifying discharge failure of a piezoelectric circuitry
The present disclosure discloses a method and apparatus for identifying discharge failure of a piezoelectric circuitry. The apparatus comprises a piezoelectric circuitry consisting of charging and discharging circuit with a microcontroller to compute the time required to charge and discharge the piezoelectric element respectively.
Hcl Technologies Limited


 Self-limited crack etch to prevent device shorting patent thumbnailnew patent Self-limited crack etch to prevent device shorting
A semiconductor device includes a piezoelectric layer interposed between a first metal layer and a hardmask layer. A first trench extends through the hardmask layer, the piezoelectric layer and the first metal layer.
International Business Machines Corporation


 Method of fabricating a base plate for piezo actuation patent thumbnailnew patent Method of fabricating a base plate for piezo actuation
A method of fabricating a base plate for piezoelectric actuation, comprises providing a plate having a major surface, striking a first removable portion of the plate in a first direction substantially normal to the major surface to shear the first removable portion relative to the plate by a shear distance that is less than the plate thickness. Striking the first removable portion in a second direction substantially opposite the first direction to reduce the shear distance by a reduction in shear that is less than the plate thickness.
Intri-plex Technologies, Inc.


 Piezoelectric device patent thumbnailnew patent Piezoelectric device
A piezoelectric device including a substrate, at least two electrodes extending on the substrate, at least one piezoelectric strip extending on the substrate and on the electrodes, and at least one electrically-conductive strip extending at least on one of the electrodes and on the piezoelectric strip and in contact with the substrate on either side of the piezoelectric strip.. .
Commissariat à I'Énergie Atomique Et Aux Énergies Alternatives


 Piezoelectric devices and methods for their preparation and use patent thumbnailnew patent Piezoelectric devices and methods for their preparation and use
Methods for fabricating a piezoelectric device are provided. The methods can include providing a substrate and forming a nanocrystalline diamond layer on a first surface of the substrate.
Indian Institute Of Technology Madras


 Tactile sensation providing apparatus and control  tactile sensation providing apparatus patent thumbnailnew patent Tactile sensation providing apparatus and control tactile sensation providing apparatus
A tactile sensation providing apparatus includes a piezoelectric element 1, a detection unit 7 for detecting each pressing and releasing based on an output voltage of the piezoelectric element 1, a drive unit 4 for driving the piezoelectric element 1 synchronously with the detection of each pressing and releasing by the detection unit 7 and thereby providing a tactile sensation, a discharge unit 5 for discharging the piezoelectric element 1 after the driving of the piezoelectric element 1 before start of detection of next releasing or pressing, and a voltage fixing unit 11 for fixing, after the detection of the pressing or releasing by the detection unit 7 before the start of the detection of the next pressing or releasing, an input voltage of the detection unit 7 at a predetermined voltage.. .
Kyocera Corporation


 Piezoelectric sensor assembly for wrist based wearable virtual keyboard patent thumbnailnew patent Piezoelectric sensor assembly for wrist based wearable virtual keyboard
In one example a holder for a piezoelectric sensor comprises a body comprising a first surface and a second surface, opposite the first surface and a recess formed in the first surface of the body to receive the piezoelectric sensor. Other examples may be described..
Intel Corporation


new patent

Vacuum cell-assembly device, cell-assembly method and manufacturing device


A vacuum cell-assembly device, for cell-assembly of an upper substrate and a lower substrate of a display panel, includes an upper machine table, a lower machine table, a control circuit and a dynamic sensing and regulating structure. The dynamic sensing and regulating structure is fixed on the upper machine table and comprises a plurality of sub-structures.
Boe Technology Group Co., Ltd.)


new patent

Actuation and sensing platform for sensor calibration and vibration isolation


A micro-system with integrated multi-axis actuation and sensing capabilities for in-situ calibration of long-term scale-factor drifts in the output signal of attached or monolithically integrated inertial sensors. The micro-system comprises a piezoelectric actuator, integrated position sensors, and a controller.
The Regents Of The University Of Michigan


new patent

Cylindrical resonator gyroscope


A quartz vibratory gyroscope comprises a substrate, a quartz cylindrical ring having one end connected to the substrate and an opposite open end, and a radial surface lined with an electrically conductive material, and a pair (or more) of electrodes arranged adjacent opposite sections of the electrically conductive material to electrically induce resonance at the open end of the quartz cylindrical ring, such as by electrostatic actuation or piezoelectric actuation. The same or additional electrode pairs may be used for rotational sensing, such as by capacitive sensing or by piezoelectric sensing..

new patent

A flow control valve and a mass flow controller using the same


Thereby, a flow control valve which can effectively intercept a transmission of heat using a simpler and compacter structure than a flow control valve according to a conventional technology so that the temperature of a laminated piezoelectric actuator does not exceed its heat-resistant temperature even when it is used for high-temperature process gas is provided.. .

new patent

Piezoelectric injector for direct fuel injection


A piezo injector for direct fuel injection may comprise an injector body, an actuator unit having a piezoelectric actuator with a head plate and a base plate, a hydraulic coupler having a coupler piston, a coupler cylinder, and a coupler spring, and a nozzle unit having a nozzle needle arranged in a nozzle body. The piezoelectric actuator is surrounded by a corrugated tube braced between the head plate and the base plate such that the piezoelectric actuator has a preload imparted to it.
Continental Automotive Gmbh


new patent

Liquid discharge manufacturing the same


A liquid discharge apparatus is provided, including a liquid discharge head including: an upper substrate, a plurality of piezoelectric elements, an intermediate substrate, a lower substrate and a plurality of individual traces arranged on the upper substrate and extending toward the contacts arranged on the one end side in the second direction from the plurality of piezoelectric elements respectively.. .
Brother Kogyo Kabushiki Kaisha


new patent

Liquid discharge producing piezoelectric actuator


A liquid discharge apparatus is provided, which comprises a channel substrate formed with a plurality of first and second pressure chambers disposed in a first direction, a plurality of first and second individual electrodes, a piezoelectric film, a common electrode, and first traces. The first traces are connected to exposed portions of the first individual electrodes exposed from the piezoelectric film, and each of the first traces passes from the exposed portion between the two second individual electrodes to extend to the one side in the second direction.
Brother Kogyo Kabushiki Kaisha


new patent

Liquid discharging apparatus and control liquid discharging apparatus


A liquid discharging apparatus includes a housing, a head unit that is provided in the housing, and includes a discharge section, which is provided with a piezoelectric element that is displaced depending on a driving signal, a driving signal creation section that creates the driving signal, a temperature information creation section that creates temperature information, which shows a temperature of a predetermined location inside the housing, a detection signal creation section that creates a detection signal by amplifying a residual vibration signal, which shows residual vibrations that occur in the discharge section after the piezoelectric element is displaced depending on the driving signal, with an amplification factor that depends on a temperature, which the temperature information shows, and a discharge state determination section that determines a discharge state of the liquid in the discharge section on the basis of the detection signal.. .
Seiko Epson Corporation


new patent

Driving circuit for driving a capacitive load


Provided is a liquid discharging apparatus which includes a modulation circuit which generates a modulation signal which is obtained by pulse-modulating a source signal, a transistor which generates an amplified modulation signal by amplifying the modulation signal, a low pass filter which includes an inductor and a capacitor and generates a drive signal by smoothening the amplified modulation signal, a piezoelectric element which is displaced by receiving the drive signal, a cavity of which the internal volume changes in accordance with the displacement of the piezoelectric element, a nozzle through which liquid in the cavity is discharged in accordance with change in the internal volume of the cavity, and a circuit substrate on which the modulation circuit, the transistor, and the low pass filter are mounted, in which the capacitor is a leadless type capacitor.. .
Seiko Epson Corporation


new patent

Drive circuit for driving a capacitive load


A liquid discharge apparatus includes: a modulation circuit that generates a modulated signal by pulse-modulating a source signal; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that returns the drive signal to the modulation circuit; a circuit board; a piezoelectric element that is displaced by application of the drive signal thereto. The circuit board has a first mounting surface and a second mounting surface.
Seiko Epson Corporation


Electronic device


An electronic device 1 includes: a panel 10; a housing 60 holding the panel 10; and a piezoelectric element 30 attached to the panel 10, wherein the deformation of the piezoelectric element 30 causes the panel 10 to vibrate, to transmit human body vibration sound to an object in contact with the panel 10, and the perpendicular line or normal to the main surface of the panel 10 and the surface of the piezoelectric element 30 attached to the panel 10 are not orthogonal to each other.. .
Kyocera Corporation


Drive circuit for driving a capacitive load


A liquid discharge apparatus includes: an modulation circuit that generates a modulated signal by pulse-modulating a source signal through self-oscillation; a transistor that amplifies the modulated signal to generate an amplified modulated signal; a low-pass filter that includes an inductor and a capacitor and smoothes the amplified modulated signal to generate a drive signal; a feedback circuit that allows the drive signal to return to the modulation circuit; a piezoelectric element that is displaced by application of the drive signal thereto; a cavity that is filled with a liquid inside and has an internal volume which changes when the piezoelectric element is displaced; and a nozzle that is provided to discharge the liquid inside the cavity in response to the change of the internal volume of the cavity. In this configuration, a self-resonant frequency of the capacitor is higher than a frequency of the self-oscillation..
Seiko Epson Corporation


Lifting system, electrical testing, vibration damper, and machine assembly


The invention relates to a lifting system, comprising a piezoelectric actuator, a support, and a hydraulic stroke multiplier having an input and an output side, wherein with the input side of the hydraulic stroke multiplier said hydraulic stroke multiplier is tied to the piezoelectric actuator, and with the output side of the hydraulic stroke multiplier said hydraulic stroke multiplier is tied to the support. In the method for electrically testing an electronic component, the component is placed on the support of such a lifting system, and is lifted for positioning relative to a test contact.
Siemens Aktiengesellschaft


Piezoelectric drive device, robot, and drive method thereof


A piezoelectric drive device includes a vibrating plate and multiple piezoelectric drive units that are disposed in the vibrating plate, and that respectively have a contact portion which can come into contact with a driven body.. .
Seiko Epson Corporation


Piezoelectric thin film stack


The present disclosure is drawn to a piezoelectric thin film stack and method of preparing the same. The piezoelectric thin film stack can comprise a substrate with an oxide application surface, a metal oxide adhesive blend layer applied to the oxide application surface, and a piezoelectric film applied directly to the metal oxide adhesive blend layer..
The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Orego


Piezoelectric element and manufacturing piezoelectric element


Provided are a piezoelectric element having high stability, which operates with high efficiency, and a method for manufacturing the piezoelectric element. The piezoelectric element (10) has a laminate structure in which a first electrode (14), a first piezoelectric film (16), a second electrode (18), an adhesion layer (20), an interlayer (22), a third electrode (24), a second piezoelectric film (26), and a fourth electrode (28) are laminated in this order on a silicon substrate (12).
Fujifilm Corporation


Nebulizing driving apparatus and nebulizing system


A nebulizing driving apparatus is used to drive a piezoelectric material of a nebulizing module. The nebulizing driving apparatus includes a driving circuit, a control circuit and a feedback circuit.
Delta Electronics, Inc.


Piezoelectric thin-film based flexible sensing device, fabrication thereof and operating the same


A sensing device, a method for fabrication thereof, and a method for operating the same are disclosed. The sensing device includes a flexible substrate, a first metallisation layer, a piezoelectric thin film layer, a second metallisation layer, and an insulating layer.
Masdar Institute Of Science And Technology


Apparatus including optical deflector controlled by saw-tooth voltage and its controlling method


An optical deflector includes a mirror; a piezoelectric actuator adapted to rock the mirror around an axis of the mirror; and a piezoelectric sensor adapted to sense vibrations of the piezoelectric actuator. A control unit includes: a saw-tooth voltage generating block adapted to generate a saw-tooth voltage; an integral block adapted to calculate an integral voltage of a sum of a sense voltage of the piezoelectric sensor and a dc offset characteristic voltage; a dc offset characteristic voltage calculating block adapted to calculate the dc offset characteristic voltage in accordance with the integral voltage; a subtracter block adapted to generate a deviation between the saw-tooth voltage and the integral voltage; and a controller adapted to generate a drive voltage in accordance with the deviation to apply the drive voltage to the piezoelectric actuator..
Stanley Electric Co., Ltd.


Pressure-sensing device and pressure-sensing touch panel


A pressure-sensing device including a pressed component that has a contact surface to which pressure is applied by contact from a presser; a polymeric piezoelectric element that is disposed at an opposite side from the contact surface of the pressed component and that has a piezoelectric constant d14 of 1 pc/n or more as measured at 25° c. Using a stress-charge method; a curable resin layer that includes at least one selected from the group consisting of cold-setting resins, thermosetting resins, and actinic radiation-curable resins and that is in contact with at least part of a surface of the polymeric piezoelectric element; and an electrode that is in contact with at least part of a surface of the polymeric piezoelectric element or of a surface of the curable resin layer..
Murata Manufacturing Co., Ltd


Droplet discharge head and image forming apparatus incorporating same


A droplet discharge head includes a nozzle, a substrate, a diaphragm, and an electromechanical transducer element. The nozzle discharges droplets.
Ricoh Company, Ltd.


Liquid discharging apparatus, head unit, capacitive load driving circuit, and control capacitive load driving circuit


A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; an amplifier that includes a first gate driver generating a first amplification control signal based on the modulation signal, a second gate driver generating a second amplification control signal based on the modulation signal, a first transistor operating based on the first amplification control signal, a second transistor connected to the first transistor on a low-potential side in series and operating based on the second amplification control signal; an operation control portion that controls operations of the first gate driver and the second gate driver; a low-pass filter that generates a driving signal by demodulating an amplification modulation signal generated based on operations of the first transistor and the second transistor; and a piezoelectric element that is displaced by applying the driving signal.. .
Seiko Epson Corporation


Printing apparatus, control printing apparatus, and control program for printing apparatus


A printing apparatus includes a first piezoelectric element; a first cavity; a first nozzle; a second piezoelectric element; a second cavity; a second nozzle; a drive signal generating unit that generates a drive signal; a residual vibration detecting unit that detects the first residual vibration signal and the second residual vibration signal; a discharge state determining unit that determines the state of discharge from the first nozzle from the first residual vibration signal and determines the state of discharge from the second nozzle from the second residual vibration signal; and a setting unit that sets the frequency of detection of the first residual vibration signal to be higher than the frequency of detection of the second residual vibration signal.. .
Seiko Epson Corporation


Device for receiving impacts, comprising inner piezoelectric energy recovery means


A device includes a deformable shell that defines an inner space under a gas pressure higher than the atmospheric pressure. A flexible piezoelectric membrane is applied against an inner wall of the deformable shell under the effect of the pressure present in the inner space.
Commissariat A L'energie Atomique Et Aux Energies Alternatives


Device for contactless monitoring of patient's vital signs


Device for contactless monitoring of a patient's vital signs in the form of a measuring mat comprising at least one measuring element. The measuring element comprises a piezoelectric sensor with a first and a second conductive electrode and a piezoelectric element.
Linet Spol. S R.o.


Device with rigid shell designed to undergo impacts and comprising internal energy recovery means


A device includes a rigid outer shell defining a hollow inner space. The device also includes an inner shell defining a hollow inner space.
Commissariat A L'energie Atomique Et Aux Energies Alternatives


Powerpad


Aspects of the present invention include: a method of fabricating a large-scale triboelectri nano-generator, a method of fabricating a large scale piezoelectric nanogenerator, and a method of placing either or both kinds of nano-generators in a single housing.. .

Piezoelectric element, multilayered piezoelectric element, liquid discharge head, liquid discharge apparatus, ultrasonic motor, optical apparatus, and electronic apparatus


A lead-free piezoelectric element that stably operates in a wide operating temperature range contains a lead-free piezoelectric material. The piezoelectric element includes a first electrode, a second electrode, and a piezoelectric material that includes a perovskite-type metal oxide represented by (ba1-xcax)a(ti1-yzry)o3 (1.00≦a≦1.01, 0.02≦x≦0.30, 0.020≦y≦0.095, and y≦x) as a main component and manganese incorporated in the perovskite-type metal oxide.
Canon Kabushiki Kaisha


Piezoelectric energy harvesting


An energy harvesting unit comprising: a package formed by a base and a lid, the package including a sealed interior volume and an exterior; a ledge formed in the sealed interior volume with a first cavity above and a second cavity below the ledge; a plurality of inner electrical contacts formed on the ledge; a plurality of outer electrical contacts formed on the exterior of the package wherein the outer electrical contacts are electrically connected to the inner electrical contacts through the package; and, a piezo-electric member in electrical communication with the inner electrical contacts and coupled to the ledge on a first side of the package and spanning across the cavity and coupled to the ledge on an opposite side of the package.. .
Meggitt A/s


Planar piezoelectric actuator providing a large shear movement


An actuator providing a large shear movement in a chosen direction. The angle of inclination of the fibres relative to the chosen direction is larger than 2° and smaller than 40°; the spaces between the piezoelectric fibres of the active layer are filled with an incompressible elastic material; the active layer comprises at least two dimensionally stable elongate elements parallel to the chosen direction; the ends of each fibre are adhesively bonded to said dimensionally stable elements using a rigid adhesive; and said dimensionally stable elements are adhesively bonded, by a rigid adhesive, to said electrode-bearing layers..
Office National D'Études Et De Recherches Aérospatiales (onera)


Vibration generating apparatus


A vibration generating apparatus includes a mass body; an, elastic member coupled to the mass body; and a piezoelectric element disposed on one surface of the elastic member facing the mass body, wherein a surface of the mass body facing the piezoelectric element has a shape that prevents contact between the piezoelectric element and the mass body.. .
Mplus Co., Ltd.


Method for producing a piezoelectric multilayer component and a piezoelectric multilayer component


A method for producing a piezoelectric multilayer component is disclosed. Piezoelectric green films and electrode material are provided, arranged alternately on top of one another and sintered.
Epcos Ag


Multiple electrode plane wave generator


The invention may be embodied as an ultrasonic plane wave generator having a first sheet of piezoelectric material and a second sheet of piezoelectric material. A shared electrode may be between the first sheet and the second sheet.
Qualcomm Incorporated


Touch panel having press detection function


A piezoelectric sensor that can perform position detection and load detection. The touch panel having press detection function can detect the pressing load inputted to the pressing surface.
Nissha Printing Co., Ltd.


Phased array ultrasonic transducers with solderless stack bonding assembly


Disclosed is an ndt/ndi probe array and manufacturing method. The probe array includes a sheet of flexible circuit 10 with a plurality of lower pins 102 and corresponding, electrically connected, upper pins 104.
Olympus Scientific Solutions Americas Inc.


Vibrating element and manufacturing the same, gyro sensor, electronic apparatus and moving object


A vibrating element includes a vibrating arm for detection. An electrode is provided on the vibrating arm for detection.
Seiko Epson Corporation


Piezo electric and high voltage absorption cooling system


The ever increasing cost of electricity has become a main area of concern for the indoor climate control business due to the fact that conventional absorption cooling devices suffer from a very high power consumption ranging from 2 kw to tens of kilo watts. The high power consumption of a typical absorption coolers comes from the operation of the boiler which is used to heat the lithium bromide (libr) solution, as well as the chiller pump and pipings.

Liquid ejecting head and liquid ejecting apparatus


At an area corresponding to a pressure chamber, the width of a lower electrode film in a nozzle row direction is narrower than the width of the pressure chamber in the same direction. A vibrating plate at the area corresponding to a pressure chamber includes an area p1, an area p2, and an area p3.
Seiko Epson Corporation


Force detection device and robot


To obtain a force detection device and a robot light in weight and having excellent detection accuracy, a force detection device includes a first member, a second member joined to the first member, and a piezoelectric element joined to the second member. A material forming the first member is different from a material forming the second member.
Seiko Epson Corporation


Identification apparatus and method


An electronic baggage tag (1) includes one or more of: •• a sensor (17) for sensing an external trigger and an electronic display screen (2a, 2b) arranged selectively to display baggage tag codes and/or information in response to the external trigger; •• a power source comprising one or more of piezoelectric, kinetic, acoustic or radiation-based power sources; •• an electronic variable colour indicator configurable according to the area of origin or transit of the baggage item (40); •• means for capturing information relating to the local environment of the baggage item, and means for reporting the information to a remote service; •• means for sensing the contents of the baggage item, and means for providing an output responsive to said sensing; and •• a remote communications interface for communication over a remote communications network, and a local communications interface for communication over a local communications link, the tag arranged to relay, to the remote communications network, data received over the local communications link.. .
British Airways Plc


Acoustic wave elements, and duplexers and electronic devices using same


An acoustic wave element that includes a piezoelectric body, an aluminum oxide layer disposed on the piezoelectric body, an electrode disposed on the aluminum oxide layer, and a protection film disposed on the aluminum oxide layer to cover the electrode. The piezoelectric body is formed of a piezoelectric material based on lithium niobate having euler angles (φ, θ, ψ).
Skyworks Panasonic Filter Solutions Japan Co., Ltd


Piezoelectric element drive circuit and robot


A piezoelectric element drive circuit includes a piezoelectric element array in which the n number (n is an integer of two or more) of piezoelectric elements respectively having a piezoelectric substance whose thickness is 0.05 μm to 20 μm and two electrodes interposing the piezoelectric substance therebetween are connected in series, a first generation circuit that supplies a voltage including an ac component and a dc component to the piezoelectric element array, and a second generation circuit that supplies a voltage including the dc component to the m number (m is an integer of one or more) of connection points within the (n−1) number of connection points between two adjacent piezoelectric elements in the piezoelectric element array.. .
Seiko Epson Corporation


Piezoelectric element drive circuit and robot


A piezoelectric element drive circuit includes a piezoelectric element that has a piezoelectric substance whose thickness is 0.05μ to 20 μm and two electrodes which interpose the piezoelectric substance therebetween, an inductor that is connected to the piezoelectric element in parallel, and a drive voltage generation circuit that applies a drive voltage including an ac component to the piezoelectric element and the inductor.. .
Seiko Epson Corporation


Piezoelectric drive device, robot, and drive robot


A piezoelectric drive device includes multiple piezoelectric drive units that drive a driven member. Each of the multiple piezoelectric drive units has a vibrating plate, a piezoelectric vibrating body which is disposed in the vibrating plate, and a contact member which can come into contact with the driven member.
Seiko Epson Corporation


Ceramic


The present invention relates to a ceramic comprising (or consisting essentially of) a solid solution containing bi, k, ti and fe (and optionally pb) which exhibits piezoelectric behaviour.. .
Lonix Advanced Technologies Limited


Method for driving piezoelectric element, piezoelectric element, and piezoelectric element applied device


A method for driving a piezoelectric element including a first electrode, a piezoelectric layer formed on the first electrode and containing a composite oxide of an abo3 type perovskite structure, and a second electrode formed on the piezoelectric layer, and the method includes driving the piezoelectric element by applying a signal having a predetermined driving waveform by a predetermined number of times, and driving the piezoelectric element by applying a signal having the predetermined driving waveform in reverse polarity.. .
Seiko Epson Corporation


Direct bandgap substrates and methods of making and using


An indirect bandgap thin film semiconductor circuit can be combined with a compound semiconductor led such as to provide an active matrix led array that can have high luminous capabilities such as for a light projector application. In another example, a highly efficient optical detector is achievable through the combination of indirect and direct bandgap semiconductors.
The Trustees Of Columbia University In The City Of New York


Remotely controllable lens device


One aspect of the present disclosure relates to a remotely controllable lens device. The lens device can include a lens material and a circuit physically coupled to the lens material.
Pohang University Of Science And Technology


Sensor systems


A sensor assembly includes a frame defining a sensor axis having opposing endplates with axially extending supports. The opposing endplates are connected by a pair of axially extending side beams.
Goodrich Corporation


Surface roughness sensor apparatus and processing tool structure using the same


The present disclosure relates to a surface roughness sensor apparatus. The surface roughness sensor apparatus includes: a rotatable rotation shaft; a piezoelectric sensor provided along a circumference of the rotation shaft, rotated by rotation of the rotation shaft, and configured to generate a sensing signal in response to a pressure applied by a surface of an object as being in direct contact with the surface of the object; and a signal transfer unit configured to transfer the sensing signal generated and transmitted by the piezoelectric sensor to the outside of the sensor apparatus, and the piezoelectric sensor may be rotated in a direction in which a relative movement between the piezoelectric sensor and the surface of the object is made at a contact point with the object to minimize damage to the surface of the object..
Soongsil University Research Consortium Techno-park


Integrated picomotor mount


An adjustable compact mount that may include an integrated configuration that is suitable for use in confined spaces. Some adjustable compact mount embodiments may include a threaded drive screw that is completely disposed within an outer perimeter of the base during use.
Newport Corporation


Liquid ejection head and liquid ejection apparatus


A liquid ejection head includes a vibration portion that serves as a wall of a pressure chamber having a shape extending in a first direction; at least one piezoelectric element that is disposed on the vibration portion at an opposite side to the pressure chamber; and an extracting portion that electrically connects the piezoelectric element to external wiring. The piezoelectric element includes a first electrode, a second electrode, and a piezoelectric material layer between the first electrode and the second electrode.
Seiko Epson Corporation


Liquid discharging apparatus, head unit, capacitive load driving circuit, and control capacitive load driving circuit


A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; an amplifier that includes a gate driver generating an amplification control signal based on the modulation signal, a bootstrap circuit supplying power to the gate driver, a power source circuit supplying power to the gate driver and the bootstrap circuit, and a transistor generating the amplification modulation signal that is obtained by amplifying the modulation signal based on amplification control signal; a low-pass filter that generates the driving signal by demodulating the amplification modulation signal; a piezoelectric element that is displaced by applying the driving signal; and a control portion that controls an operation of the amplifier. The control portion performs a second process of starting an amplification operation of the amplifier after a first process of performing supply of power to the bootstrap circuit..
Seiko Epson Corporation


Liquid discharging apparatus, head unit, capacitive load driving circuit, and control capacitive load driving circuit


A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; an amplifier that includes a first transistor and a second transistor operating based on the modulation signal; an operation control portion that controls operations of the amplifier; a low-pass filter that generates a driving signal by demodulating an amplification modulation signal generated based on operations of the first transistor and the second transistor; and a piezoelectric element that is displaced by applying the driving signal. The operation control portion performs a stopping process that stops an operation of the amplifier by allowing the first transistor to be in a non-conductive state in which a current does not flow through the first transistor and the second transistor to be in a conductive state in which the current flows through the second transistor..
Seiko Epson Corporation


Liquid discharging apparatus, head unit, capacitive load driving circuit, and control capacitive load driving circuit


A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; a switching element that generates an amplification modulation signal obtained by amplifying the modulation signal; a low-pass filter that generates a driving signal by demodulating the amplification modulation signal; a piezoelectric element that is displaced by applying the driving signal; a selection portion that is configured to include a transistor and selects whether or not the driving signal is applied to the piezoelectric element; and a detection portion that detects lowering of a power source voltage supplied to the selection portion. The detection portion performs control for lowering a voltage of the driving signal if lowering of the power source voltage is detected..
Seiko Epson Corporation


Electronic device and manufacturing the electronic device


An electronic device includes a substrate; and a plurality of thin-film elements formed on the substrate. Further, the thin-film element includes a thin-film section having a function selected from a group including piezoelectric effect, inverse piezoelectric effect, charge storage, semiconductivity, and conductivity, and the plurality of thin-film elements includes the thin-film sections having two or more different functions..

Ultrasonic probe and ultrasonic apparatus having the same


Disclosed is a ultrasonic probe provided with a plurality of rfid tags each including identification information, and a ultrasonic apparatus having the same. The ultrasonic probe includes a housing, a piezoelectric member receiving echo-ultrasonic waves reflected from a subject, and a plurality of radio-frequency identification (rfid) tags..
Samsung Medison Co., Ltd.


Ultrasonic transducer electrode assembly


The present disclosure provides a method of fabricating an ultrasound transducer. A substrate having a first side and a second side opposite the first side is provided.
Volcano Corporation


Multi-mode microphones


In some embodiments, a sensor system may include a deformable structure and a sensing element. The deformable structure may include at least one layer of piezoelectric material and at least one actuator port disposed on the at least one layer of piezoelectric material.
Silicon Audio Directional, Llc


Multi-mode microphones


In some embodiments, a sensor system may include a deformable structure and a sensing element. The deformable structure may include at least one layer of piezoelectric material and at least one actuator port disposed on the at least one layer of piezoelectric material.
Silicon Audio Directional, Llc


Multi-mode microphones


In some embodiments, a sensor system may include a deformable structure and a sensing element. The deformable structure may include at least one layer of piezoelectric material and at least one actuator port disposed on the at least one layer of piezoelectric material.
Silicon Audio Directional, Llc.


Piezoelectric speaker driver


A speaker apparatus includes a speaker assembly and a piezoelectric driver. The speaker assembly including a diaphragm and a motor.
Knowles Electronics, Llc


Vibration speaker


A vibration speaker includes a screen; a frame for supporting the screen; a support attached to the frame, including a first supporting part and a second supporting part; and a piezoelectric vibrator fixed on the support for actuating the screen to vibrate. The piezoelectric vibrator is respectively connected to the first supporting part and the second supporting part..
Aac Technologies Pte. Ltd.


Control panel for vehicle and manufacturing such control panel


A control panel and method of making a control panel for a dashboard of a passenger compartment of a vehicle. The control panel includes a trim element, a support element and a piezoelectric film.
Faurecia Interieur Industrie


Piezoelectric vibrating reed and piezoelectric vibrator


A pair of vibrating arms are arranged side by side in a second direction crossing the first direction, base end sides of which in the first direction are fixed to the base, a pair of inclined surfaces are formed in both sides of the base end of the vibrating arm in the second direction, an end portion in the base end side of an inner inclined surface is connected to an end surface in the tip end side of the base, and an end portion in the base end side of an outer inclined surface is connected to an end surface of the base in the second direction, and the base-end side end portion of the outer inclined surface is arranged closer to the tip end side than the base-end side end portion of the inner inclined surface.. .
Sii Crystal Technology Inc.


Amplifier circuit and detection apparatus including the same


An amplifier circuit converts a charge signal into a voltage signal. The charge signal indicates a detection result outputted from a piezoelectric device that detects a detection object as a change in an amount of a charge.
Murata Manufacturing Co., Ltd.


Pavement interlayer


A pavement interlayer, suitable for laying between layers of pavement, includes: at least one layer of interlayer material, a plurality of piezoelectric elements; at least one transmission line, coupled to the plurality of piezoelectric elements, for transmitting power generated by the plurality of piezoelectric elements to an output.. .

Graphene enhanced piezoelectric article of manufacture, system and energy generator and storage cell


The present invention provides a graphene enhanced piezoelectric article of manufacture, system and method of energy generation electrical energy and an electrical charge obtained from environmental motion forces present in the environment that may be collected and stored. The graphene enhanced piezoelectric generator device is configured to utilize a supersatuatrated liquid solution enhanced with graphene to interact with piezoelectric material to generate the electrical charge to provide a self-powered system.

Micro inchworm-type piezoelectric-driven rotating joint mechanism


Disclosed is a micro inchworm-type piezoelectric-driven rotating joint mechanism, including a u-shaped base, bearing pedestals, bearing brackets, bearing rings, piezoelectric ceramic plates, a rotating shaft, a rotating sleeve and end caps. Every bearing ring is divided into two half-rings which are coupled to the bearing pedestals via a pair of bearing brackets.
Hefei University Of Technology


Low voltage transistor and logic devices with multiple, stacked piezoelectronic layers


A piezoelectronic transistor device includes a first piezoelectric (pe) layer, a second pe layer, and a piezoresistive (pr) layer arranged in a stacked configuration, wherein an electrical resistance of the pr layer is dependent upon an applied voltage across the first and second pe layers by an applied pressure to the pr layer by the first and second pe layers. A piezoelectronic logic device includes a first and second piezoelectric transistor (pet), wherein the first and second pe layers of the first pet have a smaller cross sectional area than those of the second pet, such that a voltage drop across the pe layers of the first pet creates a first pressure in the pr layer of the first pet that is smaller than a second pressure in the pr layer of the second pet created by the same voltage drop across the pe layers of the second pet..
International Business Machines Corporation


Piezoelectric devices


piezoelectric devices are provided. A device can include a top electrode, a first piezoelectric layer having an upper surface disposed on a lower surface of the top electrode, a first center electrode having an upper surface disposed on a lower surface of the first piezoelectric layer, an insulating layer having an upper surface disposed on a lower surface of the first center electrode, a second center electrode having an upper surface disposed on a lower surface of the insulating layer, a second piezoelectric layer having an upper surface disposed on a lower surface of the second center electrode, and a bottom electrode having an upper surface disposed on a lower surface of the second piezoelectric layer.
Applied Cavitation, Inc.


Piezoelectric thin film element, piezoelectric actuator, piezoelectric sensor, hard-disk drive and ink jet printer device


The present invention provides a piezoelectric thin film element having a pair of electrode layers and a piezoelectric thin film sandwiched between the pair of electrode layers, wherein the pair of electrode layers are composed of platinum (pt), oxide particles are contained in at least one of the electrode layers, and the oxide particles are oxide particles of at least one element constituting the piezoelectric thin film or oxide particles of pt.. .
Tdk Corporation


Optical fiber scanner, illumination system, and observation apparatus


An optical fiber scanner is provided with an illumination optical fiber that guides light and emits the light from a distal end thereof; a plurality of piezoelectric elements that are secured on a side surface of the illumination optical fiber, that have polarizations in radial directions of the illumination optical fiber, and that vibrate the illumination optical fiber when an alternating voltage is applied in the polarization directions; and a vibration suppressing part that suppresses vibrations in the radial directions generated at a position of the illumination optical fiber away from the piezoelectric elements toward a base end.. .
Olympus Corporation


Pressure sensing and control for semiconductor wafer probing


A wafer probing system includes a probe card assembly having a plurality of individual probe structures configured make contact with a semiconductor wafer mounted on a motor driven wafer chuck, with each probe structure configured with a pressure sensing unit integrated therewith; and a controller configured to drive the probe card assembly with one or more piezoelectric driver units response to feedback from the pressure sensing units of the individual probe structures.. .
International Business Machines Corporation


Piezoelectric-effect-induced heterogeneous electrochemical reactions


Domain polarization can affect the surface properties of ferroelectric oxides. Mechanical energy is exploited to enable direct chemical reactions on the ferroelectric surface by the piezoelectric effect.
Sandia Corporation


Ink level sensor formed with an array of self-sensing piezoelectric transducers


A fluid level sensor is configured for identifying a fluid level in a small volume reservoir, such as a fluid reservoir in an ejector head. The reservoir includes a plurality of vertically arranged chambers.
Xerox Corporation


Liquid discharge apparatus, head unit, capacitive load drive circuit, and integrated circuit device for capacitive load drive


A liquid discharge apparatus includes: an integrated circuit device that includes a modulation portion which generates a modulation signal by pulse-modulating a source signal; a feedback circuit; a transistor that generates an amplified modulation signal which is obtained by amplifying the modulation signal; a low-pass filter that generates a drive signal by demodulating the amplified modulation signal; and a piezoelectric element that is displaced by applying the drive signal, wherein the feedback circuit generates a feedback signal on the basis of the drive signal, and feeds back the feedback signal to the modulation portion through a feedback terminal, the modulation portion includes a first circuit block and a second circuit block, and the integrated circuit device is configured to separate the first circuit block from the second circuit block by a triple-well structure.. .
Seiko Epson Corporation


Exterior cover with speaker


The present disclosure provides an exterior cover of an electronic device including a cover that protects a display of the electronic device. The cover may include one or more speakers.
Samsung Electronics Co., Ltd.


Passive wireless sensor including piezoelectric mems resonator


A passive wireless sensor includes a substrate having at least one microelectromechanical system (mems) piezoelectric resonator thereon. The mems piezoelectric resonator includes a piezoelectric layer between a top metal or semiconductor layer (top electrode layer) and a bottom metal or semiconductor layer (bottom electrode layer).
University Of Central Florida Research Foundation, Inc.


Frequency-variable filter


A frequency-variable filter includes a filter unit and matching circuits. The filter unit includes frequency-variable resonance circuits that include piezoelectric resonators.
Murata Manufacturing Co., Ltd.


Power generating element


The power generation efficiency is to be enhanced by converting vibration energy including various direction components into electric energy without waste. A cantilever structure is adopted, in which a first plate-like bridge portion (120) and a second plate-like bridge portion (130) extend in a shape of a letter u from a fixing-portion (110) fixed to the device housing (200) and a weight body (150) is connected to the end.
Tri-force Management Corporation


Energy generating device using temperature variation and sensor for detecting temperature variation comprising the same


An energy generating device includes first material portions comprising a first material, wherein the first material is a piezoelectric material; second material portions comprising a second material, wherein the second material has a larger coefficient of thermal expansion than the first material; lower electrodes; and upper electrodes, wherein second material portions are spaced apart from one another, the first material portions are disposed in a space between the second material portions and in contact with the second material portion, and each of the lower electrodes and upper electrodes are disposed below and above, respectively, each of the first material portions.. .
Research & Business Foundation Sungkyunkwan University


Piezoelectric actuator, ceramic component polarizing method and piezoelectric motor system


The piezoelectric actuator of the present invention has at least one ceramic component. The ceramic component has an output surface and two driving surfaces.
Chung-yuan Christian University


Multi-axis piezoelectric transducer


A multi-axis transducer is provided. The transducer includes: a stationary member; at least two connecting members and two or more energy-conversion elements disposed on each connecting member.
The Regents Of The University Of Michigan


Touch sensor


Provided herein is a touch sensor for sensing a touch of a user. The touch sensor includes a first electrode, a second electrode facing the first electrode, at least one piezoelectric element disposed between the first electrode and the second electrode, and electrode pads coupled to the first electrode..
Electronics And Telecommunications Research Institute


Display panel including piezoelectric device and compensating for properties of piezoelectric device


There is provided a display panel including a piezoelectric device and a method for compensating properties of a piezoelectric device. According to the an exemplary embodiment of the present disclosure, the display panel includes: a panel; and a piezoelectric device coupled with the panel, wherein the piezoelectric device includes: a plurality of piezoelectric elements disposed at different positions of the panel and each configured to generate vibrations according to a driving signal; a driver configured to supply the driving signal to the plurality of piezoelectric elements; a plurality of acceleration sensors configured to detect acceleration information of vibrations in different regions of the panel; and a compensator configured to control the driving signal to compensate for property deviations of the plurality of piezoelectric elements, based on the acceleration information..
Samsung Display Co., Ltd.


Mirror, more particularly for a microlithographic projection exposure apparatus


A mirror, in particular for a microlithographic projection exposure apparatus has an optically effective surface (11), a mirror substrate (12), a reflection layer stack (21) for reflecting electromagnetic radiation that is incident on the optical effective surface, and at least two piezoelectric layers (16a, 16b, 16c), which are arranged successively between the mirror substrate and the reflection layer stack in the stack direction of the reflection layer stack and to which an electric field can be applied to produce a locally variable deformation, wherein at least one intermediate layer (22a, 22b) made of crystalline material is arranged between the piezoelectric layers (16a, 16b, 16c), wherein the intermediate layer is designed to leave an electric field, which is present in the region of the piezoelectric layers (16a, 16b, 16c) that adjoin the intermediate layer (22a, 22b) in the stack direction of the reflection layer stack (21), substantially uninfluenced.. .
Carl Zeiss Smt Gmbh


Neutron detector


A neutron detecting system and method. The neutron detecting system may include one or more coated substrates including a piezoelectric substrate having a first surface and a second surface opposite of the first surface, a coating of 10boron (10b) on the first surface, and a conductive backplane deposited on the second surface.
Honeywell Fm&t


Sensor system


A sensor system is provided which includes an electroacoustic transducer, which is designed as a thickness oscillator and accordingly includes a front element having a bottom area and an end face, at least one disk-shaped piezoelectric element having a first surface and a second surface, and a rear element having a first end face and a second end face, the end face of the front element being coupled to a diaphragm which is suitable for emitting and receiving sound waves. The bottom area of the front element is joined to the first surface of the piezoelectric element integrally and/or in a force-fit manner, and the second end face of the rear element is joined to the second surface of the piezoelectric element integrally and/or in a force-fit manner.
Robert Bosch Gmbh


Device for detecting an analyte


This invention relates to a device for detecting an analyte in a sample comprising: a radiation source adapted to generate a series of pulses of electromagnetic radiation; a transducer having a pyroelectric or piezoelectric element and electrodes which is capable of transducing energy generated by non-radiative decay into an electrical signal; a detector which is capable of detecting the electrical signal generated by the transducer; a first reagent proximal to the transducer, the first reagent having a binding site which is capable of binding a labelled reagent proportionally to the concentration of the analyte in the sample, which labelled reagent being capable of absorbing the electromagnetic radiation generated by the radiation source to generate energy by non-radiative decay; a second reagent proximal to the transducer, the second reagent having a lower affinity for the labelled reagent under the conditions of the assay than the first reagent; and a third reagent proximal to the transducer, the third reagent having a binding site which is capable of binding the labelled reagent, wherein the third reagent has an affinity for the labelled reagent which is less influenced than the first reagent by the concentration of the analyte or the complex or derivative of the analyte.. .
Vivacta Limited


Variable ice and methods for measuring sample properties with the same


A system and method for measuring properties of a sample utilizing a variable integrated computation element (ice) formed of one or more layers of film that is physically sensitive to an electrical field or a magnetic field applied through the material. The thickness of a layer, and hence the optical properties of the ice, can be electrically or magnetically altered to adjust the ice for a analysis of a particular property of the sample, or to calibrate the ice or to adjust the ice to compensate for alterations to the ice resulting from environmental conditions.
Haliburton Energy Services, Inc.


Infrared radiation detection element, infrared radiation detection device, and piezoelectric element


An infrared detecting element includes a detection laminate body including a lower electrode layer, a detection layer provided on the lower electrode layer, and, an upper electrode layer provided on the detection layer. The detection layer has a columnar crystal structure.
Panasonic Intellectual Property Management Co., Ltd.




Piezoelectric topics:
  • Piezoelectric
  • Piezoresistive Material
  • Wave Device
  • Acoustic Wave
  • Electronic Device
  • Attenuation
  • Control Unit


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