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| Number | Title | Issue Date |
| 7786647 | Micromotion mechanism and microscope apparatus having micromotion mechanism A micromotion mechanism includes: a fixing base; a movable element supported by the fixing base and movable thereon; an ultrasonic actuator for relatively moving the movable element and the fixing base; and a control device for outputting a drive signal of the ultra... | 08/31/2010 |
| 7786648 | Semi-resonant driving systems and methods thereof A driving system in accordance with embodiments of the present invention includes a structure and a vibration system. The structure has at least one point to frictional couple to and drive a movable element in one of at least two directions. The structure also has a... | 08/31/2010 |
| 7755251 | Control apparatus and control method for vibration wave driven apparatus A vibration wave driven apparatus capable of preventing a resonance frequency of a vibrator from being shifted to a frequency side higher than a fixed drive frequency of the vibrator during the execution of phase difference control or voltage control. Driving signal... | 07/13/2010 |
| 7745971 | Driving device and optical apparatus Disclosed is a driving device capable of stably operating a plurality of actuators. Control units supply driving signals to piezoelectric elements to control actuators such that the actuators repeatedly change their operational states between a driving state ... | 06/29/2010 |
| 7741753 | Megasonic apparatus, circuitry, signals and methods for cleaning and/or processing The invention utilizes multiple frequency megasonic generators driving multiple frequency harmonic transducers. Generator signals that increase cavitation efficiency and that have successive time periods with predominantly stable cavitation and predominantly transie... | 06/22/2010 |
| 7737604 | Ultrasonic actuator An ultrasonic actuator includes: an actuator body (5) including an actuator body (50); a control circuit (150) for setting a driving frequency; power supply sources (191, 192) for applying a driving voltage having the driving frequency to... | 06/15/2010 |
| 7732978 | Piezoelectric element driving circuit and pump device A piezoelectric element driving circuit includes: a transformer; a switch circuit; a reactance element connected in parallel with the piezoelectric element on one of the primary side and the secondary side of the transformer, the reactance element forming a resonant... | 06/08/2010 |
| 7732977 | Transceiver circuit for film bulk acoustic resonator (FBAR) transducers A piezoelectric transducer device includes a receive signal path, a transistor and a piezoelectric transducer connected to a first terminal of the transistor. The device also includes a switch connected to a second terminal of the transistor, wherein the switch is a... | 06/08/2010 |
| 7728484 | Hybrid control circuit A device for controlling a capacitive charge, in particular a piezoelectric actuator (2) has a signal generator (6) which is used to control a first end step (1) which is used to produce a discrete signal on the capacitive charge. Device has a s... | 06/01/2010 |
| 7723899 | Active material and light emitting device An active material and light emitting device comprises an ultrasonic atomizer assembly and a light emission device. The active material and light emitting device are operated such that the active material is periodically or aperiodically dispensed and the light emit... | 05/25/2010 |
| 7719165 | Method and circuit arrangement for the precise dynamic digital control of especially piezoelectric actuators for micropositioning systems The invention relates to a method and a circuit arrangement for the precise, dynamic, digital control of especially piezoelectric actuators for micropositioning systems, comprising a regulator, whereby in order to minimise position order deviations the future system... | 05/18/2010 |
| 7709997 | Multi-element piezoelectric transducers A piezoelectric transducer formed of a body of piezoelectric material having first and second opposed sides and first and second electrically conductive layers on the first and second sides respectively of the piezoelectric body, wherein the piezoelectric body and t... | 05/04/2010 |
| 7705517 | Ultrasound transmitter A system and method for providing a high voltage ultrasonic drive signal from an ultrasound transmitter are disclosed herein. An ultrasound transmitter includes a first plurality of drive transistors. A bias network is coupled to at least one transistor of the first... | 04/27/2010 |
| 7701116 | Motor driving method, program therefor, and motor driving apparatus Provided are a motor driving method, a program therefor, and a motor driving apparatus which can shorten starting time of a vibration wave motor. A driving circuit of the vibration wave motor includes a control unit. The control unit controls two-phase driving volta... | 04/20/2010 |
| 7687972 | Drive wave generation circuit Fundamental waveform data transferred through a serial interface is stored in a register. A fundamental waveform generation circuit uses the data to generate a fundamental waveform. A selector is capable of providing fundamental waveform data stored in a fixed memor... | 03/30/2010 |
| 7679262 | Piezoelectric micro-pump and driving circuit thereof The present invention is a driving circuit applied to a piezoelectric activation element, which comprises: a driving period generation unit and a switch circuit unit. The driving period generation unit further comprises: a driving indication signal and a programmabl... | 03/16/2010 |
| 7675218 | Drive apparatus of piezoelectric actuator, electronic apparatus, drive method of electronic apparatus, drive control program of electronic apparatus, and medium An electronic device comprising a power source, a piezoelectric actuator A, and a drive control apparatus 100 for controlling the driving of the piezoelectric actuator, wherein the drive control apparatus 100 is provided with a drive circuit 111... | 03/09/2010 |
| 7675219 | Method for controlling an ultrasonic unit of an ultrasonic cleaning system The invention relates to a method for controlling an ultrasonic unit f an ultrasonic cleaning system with at least one control unit, one generator unit and one hand-held unit containing the ultrasonic unit and one switching module provided for starting the ultrasoni... | 03/09/2010 |
| 7675220 | Method of driving piezoelectric devices The driving method includes a first drive step of applying a specified drive voltage to a piezoelectric film to drive a piezoelectric device during a first drive period, a standby step of suspending a drive of the piezoelectric device to keep the piezoelectric devic... | 03/09/2010 |
| 7667370 | Generating device for generating a useful stream of a medium, in particular for generating sound A generating device (1) for generating a useful stream of a medium (2) comprises at least a medium stream source (14) for generating a high-frequency medium stream (15) and at least a medium stream diode (36, 37) for cooperating wi... | 02/23/2010 |
| 7667371 | Electronic device and circuit for providing tactile feedback A circuit (800) for controlling at least one piezoelectric actuator (142) includes a piezoelectric drive circuit (802) that generates unidirectional voltage drive signal, also referred to as Vout, at node (804). The piezoelectr... | 02/23/2010 |
| 7663291 | Drive unit and information recording device The present invention may provide a accurate drive unit 1 which comprises an electromechanical transducer 10, a drive element 12 fixed on the one end of the electromechanical transducer 10, a movable element 11 engaging with the dr... | 02/16/2010 |
| 7638923 | Operating method for a hydraulic injection valve comprising a piezoelectric actuator and a control unit The invention relates to a method and a control unit for operating a hydraulic injection valve, which comprises at least one piezoelectric actuator (2), a displaceable component (3) and a hydraulic element (9) such as bearing or a transmission s... | 12/29/2009 |
| 7638924 | Method of driving ultrasonic transducer An ultrasonic transducer includes a piezoelectric resonator including a pair of electrodes sandwiching a piezoelectric body and provided with the backing layer in contact with one of the electrodes of the piezoelectric resonator and having the same acoustic characte... | 12/29/2009 |
| 7635940 | Ultrasonic motor and microscope stage An ultrasonic motor includes a vibrator formed by stacking a plurality of rectangular piezoelectric plates in a thickness direction, a driving circuit for applying a driving signal to a piezoelectric plate, and a detection circuit for detecting an electromotive forc... | 12/22/2009 |
| 7608979 | Driving device and driving system Drive technology is provided which makes suitable low velocity driving and smooth changing of driving velocity possible and achieves reduced power consumption. In the driving device, the drive unit is driven which engages with drive shaft which moves back and forth ... | 10/27/2009 |
| 7608980 | Vibration control apparatus and method A vibration control apparatus capable of efficiently generating vibrations of different orders using the same electrodes. A plurality of electrodes polarized to have desired polarities are formed in a piezoelectric element, and are divided into a plurality of electr... | 10/27/2009 |
| 7598654 | Megasonic processing apparatus with frequency sweeping of thickness mode transducers A megasonic processing apparatus and method has one or more piezoelectric transducers operating in thickness mode at fundamental resonant frequencies of at least 300 KHz. A generator powers the transducers with a variable-frequency driving signal that varies or swee... | 10/06/2009 |
| 7589454 | Driving apparatus A driving apparatus comprises: an electro-mechanical conversion element; a driving member that drives backwards and forwards in a straight line in response to extension and contraction of the electro-mechanical conversion element which are brought about by a drive s... | 09/15/2009 |
| 7586235 | Matching circuit for megasonic transducer device A method and apparatus for matching impedance magnitude and impedance phase for an acoustic-wave transducer load and an RF power source. The acoustic-wave transducer load has a load impedance magnitude and phase. The RF power source has a source impedance magnitude ... | 09/08/2009 |
| 7569973 | Method for driving piezoelectric element or optical modulator including piezoelectric element Disclosed are a method for driving a piezoelectric element or an optical modulator including a piezoelectric element and a recorded medium recorded with a program for executing the same. In accordance with an embodiment of the present invention, the method for drivi... | 08/04/2009 |
| 7567012 | Drive unit A drive unit being characterized in that a movable object can be prevented from being tilted when the movable object is stopped using a restricting member. The drive unit comprises a piezoelectric element, a rod provided at an end of the piezoelectric element, a mov... | 07/28/2009 |
| 7564164 | Drive circuit for piezoelectric pump and cooling system that uses this drive circuit A piezoelectric element of the piezoelectric pump is driven by the output signal of an amplifier that takes as input a signal that is generated by a sine wave oscillator of the same frequency that drives the piezoelectric element. The amplifier is driven by a high v... | 07/21/2009 |
| 7564165 | Actuating device having an integrated electronic control circuit An actuating device including a load and an integrated electronic control circuit comprising a microcontroller and at least one passive component. The microcontroller performs the dual function of providing a control signal to generate sufficient power to actuate a ... | 07/21/2009 |
| 7564166 | Driving apparatus, lens driving apparatus and image pickup apparatus A driving apparatus comprises an actuator, the actuator comprising an electromechanical conversion element and a driving shaft attached to the electromechanical conversion element, wherein the driving apparatus expands and contracts the electromechanical conversion ... | 07/21/2009 |
| 7554243 | Class DE driving amplifier for piezoelectric actuators The invention relates to a method and device for driving a piezo-electric actuator. A driving voltage is coupled to the piezo-electric actuator by an inductive element coupled in series with the piezo-electric actuator. The piezo-electric actuator is adapted to move... | 06/30/2009 |
| 7550897 | Electronic drive system for a droplet spray generation device An electronic drive system for a droplet spay generation device of the type having a droplet generator including a perforate membrane driven by a piezoelectric transducer, the electronic drive system comprising: a programmable micro-controller providing a power supp... | 06/23/2009 |
| 7545076 | System and method for tracking drive frequency of piezoelectric motor A system and method for actively tracking a drive frequency of a piezoelectric motor is disclosed. A drive voltage can be applied at a drive frequency to an active piezoelectric element in the piezoelectric motor. A voltage response can be induced in a passive piezo... | 06/09/2009 |
| 7538473 | Drive circuits and methods for ultrasonic piezoelectric actuators A drive circuit for and method of driving a piezoelectric actuator utilizes an impedance coupled to the piezoelectric actuator, wherein the impedance and the piezoelectric actuator together form a tank circuit that has a resonant frequency. A first circuit is provid... | 05/26/2009 |
| 7528525 | Damping and stabilization for linear motor stage A system that facilitates damping of mechanical vibration associated with machinery that is subject to such mechanical vibration. The system comprises machinery with at least one moveable part and a piezoelectric actuator that is selectively applied to the machinery... | 05/05/2009 |
