Abstract: The present invention provides a sound device, which includes a bottom plate, a support fixed to the bottom plate, a frame arranged on the support, and a diaphragm fixed to the frame. The sound device further includes a first piezoelectric ceramic sheet and a second piezoelectric ceramic sheet that are disposed separately on the support, and the first piezoelectric ceramic sheet and the second piezoelectric ceramic sheet are respectively provided with a transmission member abutting against the diaphragm. The sound device in the present disclosure can increase a driving force, increase a vibration amplitude, enhance a product sensitivity, broaden a response range, increase a driving fulcrum, improve a vibration balance, and avoid a product distortion.

Abstract: A piezoelectric stepper drive includes a piezoelectric drive apparatus with at least two drive sections, each acted upon by at least two piezoelectric actuators, and a driven member which is advanced by at least one of the drive sections when control voltages are applied to the actuators. The drive apparatus is configured approximately in the shape of a triangle, at the tip of which the drive sections are arranged. At least one of the drive sections is biased against the driven member, in the absence of control voltages applied to the actuators, such that the drive section blocks advance of the driven member, where each of the drive sections is mounted individually resilient relative to a base of the triangle.

Abstract: The present disclosure provides an ultrasonic transducer and a method for manufacturing an ultrasonic transducer, a display substrate and a method for manufacturing a display substrate. The method for manufacturing the ultrasonic transducer includes: forming a via hole in a substrate; forming a structural layer on a side of the substrate, the structural layer cover the via hole; and etching the structural layer from a side of the substrate away from the structural layer by using the substrate formed with the via hole as a blocking layer, to form a cavity at a position of the structural layer corresponding to that of the via hole.

Abstract: An impactor, system and method for performing real-time measurements of particles in aerosol gases. The impactor comprises a plurality of cascading stages having impaction plates, mass-measurement mechanisms retained on the impaction plates, and a nozzle plate. A signal line associated with each of the plurality of cascading stages is configured to relay signals from the mass-measurement mechanism of the associated stage to a computer-based system configured to receive the transmitted signals from the signal lines, and to correlate changes in the resonant frequencies to particle concentrations in real time.

Abstract: A piezoelectric element includes a piezoelectric material layer and an electrode layer, wherein the piezoelectric material layer and the electrode layer are stacked on top of each other, the piezoelectric material layer includes a barium titanate-based material, and two coercive fields Ec1 and Ec2 of the piezoelectric element have the same sign and satisfy (|Ec2|?|Ec1|)?8 kV/cm.

Abstract: A method for exciting sound-wave producing transducers (7) which have operating frequencies defining a transducer frequency range, in which a generator (9) produces an electrical excitation signal for the transducers (7), these electrical excitation signal being fed to the transducers (7), wherein the generator (9) carries out frequency sweeps in a frequency sweep range between a minimum frequency (fmin) and a maximum frequency (fmax) with an adjustable sweep rate, with a target frequency (fZiel) being defined within said frequency sweep range, this method being characterized in that the minimum frequency (fmin), the maximum frequency (fmax) and the target frequency (fZiel) are selected in such a way that a first frequency difference (?f1) between the minimum frequency (fmin) and the target frequency (fZiel) differs in terms of magnitude from a second frequency difference (?f2) between the maximum frequency (fmax) and the target frequency (fZiel) within a number of frequency sweeps, and wherein the minimum fr

Abstract: A microfluidic device for generating microbubbles includes a substrate and a microfluidic channel embedded in the substrate. The microfluidic channel includes a plurality of fluid inlets, at least one bubble formation outlet having a nozzle with an adjustable diameter, and a flow focusing junction in fluid communication with the plurality of fluid inlets and the bubble formation outlet. A method for mass producing monodisperse microbubbles with a microfluidic device includes supplying a flow of dispersed phase fluid into a first fluid inlet of a microfluidic channel, supplying a flow of continuous phase fluid into a second fluid inlet of the microfluidic channel, and adjusting a diameter of a nozzle to obtain a plurality of monodisperse microbubbles having a specified diameter.

Abstract: A flexible touch panel includes a flexible substrate bent in a first direction, and a touch sensor unit disposed on the flexible substrate, the touch sensor unit including a bridge extending in a second direction intersecting the first direction.

Abstract: Artificial muscles comprising a body of dielectric elastomer, wherein the body contains a pair of microfluidic networks are presented. Each microfluidic network includes a plurality of channels fluidically coupled via a manifold. The channels of the microfluidic networks are interdigitated and filled with conductive fluid such that each set of adjacent channels functions as the electrodes of an electroactive polymer (EAP) actuator. By using the manifolds as compliant wiring to energize the electrodes, artificial muscles in accordance with the present disclosure mitigate some or all of the reliability problems associated with prior-art artificial muscles.

Abstract: A MEMS structure that includes: a substrate having an opening; a diaphragm arranged opposite the opening in the substrate; a plurality of anchors securing the diaphragm to the substrate or to another component; and a fixed membrane surrounding the diaphragm over a slit. The outline of the diaphragm protrudes toward the anchors and includes a predetermined intersecting structure that when viewed from the normal to the diaphragm, the diaphragm protrudes toward the anchors in at least one location on the diaphragm between two intersection points of the outline of the diaphragm and the outline of the opening in the substrate. The intersecting structure is configured such that the distance between the two intersection points is greater than the width of the diaphragm at a location closest to an anchor.

Abstract: A vibration actuator includes an elastic body on which at least one projection is formed and a vibrating body including an electromechanical conversion device, and drives a driven member that is in contact with a contact portion of the projection by causing an end portion of the projection to perform an ellipsoidal movement in response to a combination of two vibration modes generated in the vibrating body when an alternating driving voltage is applied. The elastic body is formed integrally with the projection and a bonding portion between the projection and the electromechanical conversion device. A space is provided between the contact portion and the electromechanical conversion device to which the projection is bonded. The spring portion is provided between the bonding portion and the contact portion and causes the projection to exhibit a spring characteristic when the contact portion is pressed by the driven member.

Abstract: A positioning feature includes a first member so that in an embodiment where the pins of a connector are perpendicular to a main axis, an incorrect angular orientation is prevented by the positioning feature that would contact one of the pins and, a correct angular orientation is assured by the engagement of the first member between the pins.

Abstract: A frictional electric generator, a device including the frictional electric generator, and a method for manufacturing the frictional electric generator are provided. The frictional electric generator includes a first frictional unit and a second frictional unit arranged opposite to each other. The first frictional unit includes a first output electrode, and the second frictional unit includes a second output electrode. A composite layer is arranged in at least one of the first frictional unit or the second frictional unit, and is provided with a surface having concave-convex nanostructures as a frictional surface. The first output electrode and the second output electrode are configured to form a capacitor.

Abstract: A piezoelectric motor with form-locked drive mechanism avoiding step losses and undefined step sizes caused by environmental conditions such as temperature, surface quality and air humidity by engaging actuator teeth interacting with the toothed structure of a driven rack.

Abstract: A method of manufacturing an actuator includes a first electrode layer forming step, a dielectric elastomer layer forming step, and a second electrode layer forming step, and obtains the actuator in which dielectric elastomer layers and electrode layers have been concentrically laminated. In the first electrode layer forming step, an electrode material is provided to an outer circumferential surface of a shaft section to form the electrode layer. In the dielectric elastomer layer forming step, a sheet-like or paste-like dielectric elastomer material is provided to an outer circumferential surface of the electrode layer to form the dielectric elastomer layer. In the second electrode layer forming step, the electrode material is provided to an outer circumferential surface of the dielectric elastomer layer to form the electrode layer.

Abstract: A droplet forming device is provided. The droplet forming device includes a liquid holder configured to hold a liquid, a film having a discharge hole, two or more vibration generators configured to vibrate the film, and a driver configured to apply a driving signal to the vibration generators. One or more of the vibration generators are disposed in each region on the film where a polarity of bending moment differs.

Abstract: A piezoelectric element includes a first electrode layer, a piezoelectric layer, and a second electrode layer. The first electrode layer, the piezoelectric layer, and the second electrode layer are stacked in sequence on one another. The first electrode layer has a first part overlapping the piezoelectric layer in a plan view, and a second part at least partially separated from the first part and not overlapping the piezoelectric layer in the plan view. The second electrode layer has a third part overlapping the piezoelectric layer in the plan view, and a fourth part separated from the third part. The fourth part is in contact with the first part and the second part.

Abstract: Embodiments of the invention include a current sensing device for sensing current in an organic substrate. The current sensing device includes a released base structure that is positioned in proximity to a cavity of the organic substrate and a piezoelectric film stack that is positioned in proximity to the released base structure. The piezoelectric film stack includes a piezoelectric material in contact with first and second electrodes. A magnetic field is applied to the current sensing device and this causes movement of the released base structure and the piezoelectric stack which induces a voltage (potential difference) between the first and second electrodes.

Abstract: A capacitive actuator motor according to an embodiment of the present invention includes a capacitive actuator having six actuator units and a motor output cam having a periodic shape portion. Each of the six actuator units includes a buckling displacement expansion mechanism configured to convert an output of a piezoelectric element and urge an output joint in a predetermined output direction and a preload adjustment spring configured to urge an output joint with a certain characteristic in a direction in which the periodic shape portion and the output joint come into contact with each other.

Abstract: Embodiments of the present invention provide an automobile including a processor and a sensing apparatus, and the sensing apparatus is installed on a part that is of the automobile and that may be in contact with a hand of a driver, and includes a transmitter and a receiver. The transmitter sends a sound wave signal to the hand of the driver, and the receiver receives a reflected sound wave signal reflected by the hand of the driver, converts the reflected sound wave signal to an electrical signal, and sends the electrical signal to the processor. The processor analyzes the electrical signal to obtain a feature of the reflected sound wave signal, and recognizes an identity of the driver based on the feature of the reflected sound wave signal.

Abstract: An inkjet printhead includes: a rigid elongate manifold having at least one ink supply channel and a lower surface with a longitudinal ink cavity defined therein, the longitudinal ink cavity having a roof and sidewalls extending between the roof and the lower surface; a metal film sealingly attached to the lower surface so as to bridge across the longitudinal ink cavity, the film having a plurality of film apertures for receiving ink from the longitudinal ink cavity; and a plurality of printhead chips attached to the film, each printhead chip receiving ink from the longitudinal ink cavity via the film apertures. A plurality of through-holes are defined in the manifold to provide fluid communication between the ink supply channel and the longitudinal ink cavity. The through-holes extend perpendicular to the ink supply channel and the longitudinal ink cavity.

Abstract: The invention is directed to a device and to a method for generating an oscillatory motion of a mass, wherein an oscillating electrical signal and/or an operation power is wirelessly transmitted in order to facilitate retrofitting the device.

Abstract: A downhole seal includes a field responsive shape changeable material configured as a layer having a first surface and a second surface, a first field generating electrode disposed in operable communication with the first surface, and a second field generating electrode disposed in operable communication with the second surface.

Abstract: A fuel injection valve of a fuel injection system includes a connector piece that is insertable at least partly into a receiving space of a connector body of a fluid-conveying component. In the installed state a support part is disposed on the connector piece, and the connector piece is mounted via the support part on the connector body. The support part has a spherical support surface with which the support part braces at least indirectly against the connector body in order to implement the mounting of the connector piece directly or indirectly on the connector body.

Abstract: Disclosed is a piezoelectric rotary drive for a shaft, which includes a piezoelectric actuator, a deformable frame that can be coupled with a coupling section to the shaft in a force-fit manner in order to accomplish a stick-slip drive, and a loading device which can apply a preloading force to the coupling section and/or the actuator and/or the shaft. To facilitate production and assembly, the loading device can be a leaf spring which in the relaxed state extends substantially in a plane, such as along a straight line.

Abstract: A piezoelectric material contains ferroelectric particles and an adhesive resin. The ratio of the ferroelectric particles relative to the total mass of the ferroelectric particles and the adhesive resin is 40 mass % or greater and 98 mass % or less.

Abstract: A haptic stimulator includes a multilayer sheet with a piezoelectric or electroactive polymer layer adapted to mechanically deform upon application of voltage, the multilayer sheet secured to a substrate, and a source of electrical stimulation coupled to drive electrodes on the polymer layer with an AC signal to vibrate the polymer layer. In particular embodiments, the polymer contains polyvinylidene fluoride, and electrodes are patterned to control local electric fields. Another haptic stimulator has first and second electrodes with an air gap and an insulating sheet between first and second electrodes, with an AC voltage driver connecting to the electrodes. In a method of providing haptic stimulation to skin an alternating current supply drives first and second electrodes, the electrodes disposed upon either a piezoelectric or electroactive polymer sheet, vibrating the polymer layer by driving the electrodes; and coupling vibrations of the polymer layer to the sensate skin.

Abstract: A magnetoelectric energy harvester having excellent power generation performance and a manufacturing method thereof are provided. The magnetoelectric energy harvester includes a magnetostrictive material portion including a magnetostrictive material which generates a mechanical deformation when being magnetized. The magnetoelectric energy harvester also includes a piezoelectric material portion which has a bending vibration mode and includes a piezoelectric material which produces power by receiving a mechanical deformation force from the magnetostrictive material portion.

Abstract: The present invention provides, in various embodiments, a miniature movable-beam laser objective configured to fit within the very small dimensions of a standard objective. This small, portable movable-laser source allows the beam to be directed at a computer-generated target or at the spot of a focused target-designator beam.

Abstract: A pressure sensor according to an aspect of the present invention comprises a plurality of piezoelectric elements that are sheet-like and laminated, wherein: the plurality of piezoelectric elements are divided into a plurality of element groups; and the plurality of element groups are connected in parallel and in each element group the piezoelectric elements are connected in series, or the plurality of element groups are connected in series and in each element group the piezoelectric elements are connected in parallel.

Abstract: The present invention is related to a sensor. In particular, the present invention is related to a MEMS strain gauge die and its fabrication process. The MEMS strain gauge die comprises a handle, a device layer and a cap all connected together. A silicon oxide layer is formed between the handle and the device layer. Another silicon oxide layer is formed between the device layer and the cap. Recesses are respectively formed on the handle and the cap and face each other. The handle recess and the cap recess are connected to form a cavity. The device layer, which spans the cavity, further comprises a bridge on which a plurality of piezoresistive sensing elements are formed. The present strain gauge die is more immune to temperature effects. It is especially suitable for operating in a high temperature environment and is capable of delivering accurate and reliable strain measurements at low cost.

Abstract: Embodiments of a tunable bandpass microelectromechanical (MEMS) filter are described. In one embodiment, such a filter includes a pair of arch beam microresonators, and a pair of voltage sources electrically coupled to apply a pair of adjustable voltage biases across respective ones of the pair of arch beam microresonators. The pair of voltage sources offer independent tuning of the bandwidth of the filter. Based on the structure and arrangement of the filter, it can be tunable by 125% or more by adjustment of the adjustable voltage bias. The filter also has a relatively low bandwidth distortion, can exhibit less than 2.5 dB passband ripple, and can exhibit sideband rejection in the range of at least 26 dB.

Abstract: An actuator device (AV) including a main body (10) with a base body (10a) and a buildup body (10b) a plurality of actuators which are formed of actuator bodies comprising a piezoelectric or electrostrictive material and actuation electrodes and a printed circuit board (100) which extends in the longitudinal direction (X) of the actuator device (AV) over at least sections of actuator connection coatings, wherein conductive paths thereof are in electrical contact with the actuator connection coatings and wherein in the connection area segment (S0b, S1b, S2b, S3b) of the respective recess (S0, S1, S2, S3) at least in sections a connection layer (V) made of a resin reinforcement material with bismaleimide is disposed such that the connection layer (V) at least in sections contacts side surfaces (AS1, AS2) which respectively delimit a connection area segment (S0b, S1b, S2b, S3b) and which are opposed to each other.

Abstract: The present invention relates to a piezoelectric fiber having excellent flexibility, the piezoelectric fiber employs a conductive fiber member as an inner electrode, on which a piezoelectric polymer layer, an outer electrode and a coating layer are sequentially formed, thereby having excellent flexibility and sufficient elasticity to be sewed, woven, knotted or braided. Therefore, the piezoelectric fiber can be applied in power supplies for a variety of sizes and types of wearable electronic devices, portable devices, clothing, etc. In addition, since the piezoelectric fiber has excellent piezoelectricity and durability because of the above-described structure, it can effectively convert deformation or vibration caused by external physical force into electric energy, and thus can replace existing ceramic-based and polymer piezoelectric bodies, etc. Furthermore, an economical and simple method of manufacturing a piezoelectric fiber having excellent piezoelectricity is provided.

Abstract: The piezoelectric element comprises a piezoelectric body extending in a lateral direction and a first and second electrodes that are provided on the piezoelectric body. The piezoelectric body has an active portion sandwiched between the first and second electrodes in a thickness direction that is vertical to the lateral direction, and an inactive portion connected to the active portion in the lateral direction. The first electrode has an active electrode portion disposed on the active portion. The active electrode portion includes an interface region that is adjacent to the interface of the active portion and the inactive portion in the lateral direction, and an inner region that is separated from the interface of the active portion and the inactive portion in the lateral direction. The cross sectional surface area per unit length of the interface region in the cross section of the active electrode portion is greater than the cross sectional area per unit length of the inner region.

Abstract: The subject matter described herein relates to methods and systems for fast imprinting of nanometer scale features in a workpiece. According to one aspect, a system for producing nanometer scale features in a workpiece is disclosed. The system includes a die having a surface with at least one nanometer scale feature located thereon. A first actuator moves the die with respect to the workpiece such that the at least one nanometer scale feature impacts the workpiece and imprints a corresponding at least one nanometer scale feature in the workpiece.

Abstract: Example variable pitch propulsion mechanisms may include propeller hubs having variable pitch propeller blades. The propeller hubs may include shape memory actuators operatively connected to the propeller blades to change their pitch. In addition, the propeller hubs may include linkage arms to transfer movement from the shape memory actuators to the propeller blades. Further, the propeller hubs may include geared connections to transfer movement from the shape memory actuators to the propeller blades. Moreover, the propeller hubs may include latch mechanisms, similar to retractable pen mechanisms, to transfer movement from the shape memory actuators to the propeller blades and decouple movement of the propeller blades from alignment of the propeller blades.

Abstract: A method can be used for producing ceramic multilayer components. The method includes providing green layers for the ceramic multilayer components, stacking the green layers into a stack, and subsequently compressing the stack to form a block. Furthermore, the method includes isolating the block into partial blocks that each have a longitudinal direction, thermally treating the partial blocks, subsequently mechanically machining surfaces of the partial blocks, and providing the partial blocks with outer electrodes and isolating the partial blocks in each case transversely to the longitudinal direction into individual ceramic multilayer components.

Abstract: A piezoelectric device includes a body provided with a first region and a second region lined along a first direction. The first region deformably extends/contracts along the first direction. The second region deformably curves in such a manner that one or the other side in a second direction intersecting the first direction curves outward.

Abstract: A piezoelectric sensing module, a piezoelectric sensing module detecting method, and a piezoelectric sensing detection system thereof are disclosed. The piezoelectric sensing module is used for an operating tool. The piezoelectric sensing module includes a piezoelectric sensing film, and the piezoelectric sensing film includes at least a first to a sixth electrodes; wherein the first electrode is disposed between the third and the fourth electrodes, the second electrode is disposed between the fifth and the sixth electrodes; wherein the first and the second electrodes, the third and the fifth electrodes, and the fourth and the sixth electrodes are separated by a certain distance respectively, and a first angle between the first and the second electrodes, a second angle between the third and the fifth electrodes, and a third angle between the fourth and the sixth electrodes each have an included angle of 90 degrees.

Abstract: A pressure sensor and a method for measuring a pressure, the pressure sensor including a main body having a piezoelectric material and at least two internal electrodes arranged in the piezoelectric material, where the at least two internal electrodes are arranged such that a voltage arises between the at least two internal electrodes when a pressure acts on a side surface of the main body.

Abstract: A piezoelectric device is provided and includes: a piezoelectric vibrating piece, having an outer shape in rectangular shape and including an excitation electrode formed on both principal surfaces which are a top surface and a lower surface, an electrode pad formed at both ends of one short side, and an extraction electrode extracted from the excitation electrode to the electrode pad to be electrically connected to the electrode pad; a package, including a placement surface on which the piezoelectric vibrating piece is placed as opposed to the lower surface of the piezoelectric vibrating piece, and an adhesion pad formed on the placement surface; and a conductive adhesive, securing the piezoelectric vibrating piece to the package and electrically connecting the adhesion pad to the electrode pad. An adhesive is applied on the top surface of the piezoelectric vibrating piece and between the conductive adhesive and the excitation electrode.

Abstract: A foldable device includes: a display; a touch panel configured to detect a touch input; a sensing interface configured to detect an angle of the foldable device; and a controller configured to activate the display unit when the angle detected by the sensing unit as the foldable device is unfolded is equal to or greater than a first angle, and activate the touch panel when the angle detected by the sensing unit is equal to or greater than a second angle.

Abstract: The application describes a MEMS transducer in which first and second conductive elements of a capacitor are both provided on the membrane. The membrane is shaped such that the first and second conductive elements are displaced relative to each other when the flexible membrane deflects in response to a pressure differential across the membrane. For example the membrane may be corrugated.

Abstract: An enhanced method and precision nanopositioning apparatus for implementing enhanced nanopositioning performance is provided. The nanopositioning apparatus includes a vertical linear nanopositioning flexure stage and a horizontal linear nanopositioning flexure stage. The vertical linear nanopositioning flexure stage includes a stage base, a symmetrically configured flexure linear guiding mechanism with precision motion enhancement structure, and a stage carriage. The horizontal linear nanopositioning flexure stage is mounted on the stage carriage of the vertical linear nanopositioning flexure stage, and includes a middle-bar relative position control mechanism to enhance the stiffness of a flexure linear guiding mechanism.

Abstract: Certain configurations of a stable capacitor are described which comprise electrodes produced from materials comprising a selected coefficient of thermal expansion to enhance stability. The electrodes can be spaced from each other through one of more dielectric layers or portions thereof. In some instances, the electrodes comprise integral materials and do not include any thin films. The capacitors can be used, for example, in feedback circuits, radio frequency generators and other devices used with mass filters and/or mass spectrometry devices.

Abstract: A device for projecting a time variable optical pattern onto an object that is to be measured in three dimensions, the device comprising a frame for an optical pattern; a light source with optional illumination optics; and imaging optics, wherein the optical pattern is on slide that is attached to a movement mechanism that moves the optical pattern relative to the optional illumination optics and/or relative to the imaging optics, wherein the movement mechanism causes a movement of the optical pattern in a slide plane that is oriented orthogonal to an optical axis of the imaging optics.

Abstract: Systems, apparatuses, and methods for manufacturing a microelectromechanical system (MEMS) device. The MEMS device includes a substrate, a cap, a microelectromechanical component, and a tag. The cap is coupled to the substrate such that the substrate and the cap cooperatively define an interior cavity. One of the substrate or the cap defines a port. The microelectromechanical component is disposed within the interior cavity. The tag is coupled to the substrate and an exterior surface of the cap to secure the cap to the substrate.

Abstract: A piezoelectric deflection sensor includes a first piezoelectric plate having a polarization axis direction that is parallel to first and second principal surfaces, first and second segmented electrodes provided on the first principal surface of the first piezoelectric plate, and third and fourth segmented electrodes provided on the second principal surface of the first piezoelectric plate. A piezoelectric element is defined by the first piezoelectric plate and the first to fourth segmented electrodes. The first segmented electrode and the third segmented electrode oppose each other across the first piezoelectric plate, and the second segmented electrode and the fourth segmented electrode oppose each other across the first piezoelectric plate. The first segmented electrode and the fourth segmented electrode are electrically connected to each other, and the second segmented electrode and the third segmented electrode are electrically connected to each other.

Abstract: A piezoelectric element includes a piezoelectric body layer, a first electrode, a second electrode, a third electrode, and a first through-hole conductor. The piezoelectric body layer has rectangular first and second principal surfaces opposing each other, and includes a piezoelectric material. The first electrode is provided on the first principal surface. The second electrode is provided on the first principal surface in such a way that the second electrode is separated from the first electrode. The third electrode is provided on the second principal surface in such a way that the third electrode opposes the first electrode. The through-hole conductor penetrates the piezoelectric body layer and is connected to the second electrode and the third electrode. The first electrode has a round corner when seen in an opposing direction of the first and second principal surfaces.